WO2020148366A1 - Broyeur à billes et bol de broyage pour broyeur à billes - Google Patents

Broyeur à billes et bol de broyage pour broyeur à billes Download PDF

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Publication number
WO2020148366A1
WO2020148366A1 PCT/EP2020/050986 EP2020050986W WO2020148366A1 WO 2020148366 A1 WO2020148366 A1 WO 2020148366A1 EP 2020050986 W EP2020050986 W EP 2020050986W WO 2020148366 A1 WO2020148366 A1 WO 2020148366A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinding bowl
grinding
lifting
holder
ball mill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2020/050986
Other languages
German (de)
English (en)
Inventor
Stefan Drechsler
Bastian Sonntag
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Retsch GmbH
Original Assignee
Retsch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE202019105373.9U external-priority patent/DE202019105373U1/de
Priority claimed from DE202019106400.5U external-priority patent/DE202019106400U1/de
Application filed by Retsch GmbH filed Critical Retsch GmbH
Priority to JP2021541279A priority Critical patent/JP7441845B2/ja
Priority to CN202080021603.3A priority patent/CN113573814B/zh
Priority to EP20702575.0A priority patent/EP3911444A1/fr
Publication of WO2020148366A1 publication Critical patent/WO2020148366A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B02C17/08—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with containers performing a planetary movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details

Definitions

  • a first aspect of the present invention relates to a ball mill on a laboratory scale according to the preamble of claim 1 and a grinding bowl for a ball mill according to the preamble of claim 4.
  • the invention relates to a ball mill on a laboratory scale, with a carrier device rotatably mounted about a central axis, with at least a grinding bowl holder for at least one grinding bowl, the grinding bowl holder being rotatably mounted about an offset planetary axis to the carrier device and being carried by the latter about the center axis, and with a tensioning device with a tensioning element for axially tightening the grinding bowl against the grinding bowl holder and for axially releasing the grinding bowl.
  • Laboratory ball mills according to the proposal can be designed as planetary or centrifugal mono ball mills with only one grinding station or as ball mills with several grinding stations, the grinding stations preferably being arranged symmetrically about the center axis in order to compensate moments of inertia as well as possible.
  • DE 10 2012 009 987 A1 discloses a laboratory ball mill. This has a carrier device which rotates about a vertical center axis. On the carrier device, a plurality of grinding stations are rotatably mounted to the carrier device about a planet axis offset parallel to the center axis, each grinding station having a cage-like receiving device for at least one grinding bowl which can be filled with grinding stock and grinding media, in particular grinding balls. Each receiving device is carried about the center axis by the carrier device and additionally rotates - mostly in the opposite direction - to the carrier device about the respective planet axis.
  • the laboratory ball mill described in DE 10 2012 009 987 A1 has a tensioning device with a tensioning element for axially tensioning a grinding bowl in the receiving device and a motor drive for the clamping element, which automatically actuates the tensioning of the grinding bowl in the receiving device.
  • the axial bracing is accomplished by means of an eccentric shaft extending transversely to the planetary axis as a tensioning element, which is rotatably mounted in the receiving device for the grinding bowl.
  • the ball mill has a motor, which is stationary in relation to a device housing. half of the support device is attached. The motor drives a drive shaft that is slotted at its end in order to be able to couple to the eccentric shaft.
  • Coupling to the eccentric shaft is only possible if the grinding station is in a specific insertion and removal position and in the correct rotational orientation.
  • the eccentric shaft can then be rotated via the motor, an axial change in height of the eccentric shaft being transmitted via a plate spring to a spring-loaded pressure plate which lifts the grinding bowl until it abuts with a grinding bowl cover against a stop on the receiving device. By turning back the eccentric shaft it is possible to release the tension again.
  • the known ball mill has a complex construction. Another disadvantage is that it is difficult to couple the motor to the eccentric shaft to tension / relax the grinding bowl. Since the eccentric shaft is mounted in the holding device for the grinding bowl, the eccentric shaft also rotates during operation of the ball mill, which leads to unbalance effects which lead to vibrations and increased wear.
  • the design of the receiving device as a rigid cage means that access to the grinding bowl is severely restricted. To take a sample, it is always necessary to remove the grinding bowl from the cage. Therefore, the operation of the known ball mill is not very user-friendly.
  • the object of the present invention is to provide a ball mill and a grinding bowl for such a mill, which enable a high level of operating comfort with high safety and, in particular, convenient sampling with improved accessibility to the grinding bowl.
  • the tensioning and relaxing of a grinding bowl on the grinding bowl holder should be quicker and less expensive.
  • the ball mill should preferably have a simple construction.
  • the imbalance when operating the ball mill should be low.
  • a first aspect of the present invention is that the ball mill preferably a clamping element for holding the bottom or bottom side of the Has grinding bowl on or on an associated grinding bowl holder.
  • the bracing device and the grinding bowl holder are designed for receiving, holding and / or bracing the grinding bowl only on the underside or only on the bottom. This enables a very simple structure and very good accessibility.
  • the proposed grinding bowl is characterized in particular by the fact that (only) it is provided on the bottom side with a holding section for holding or bracing on the floor side on or against or on the assigned grinding bowl holder. This results in corresponding advantages.
  • the grinding bowl is therefore preferably held only on the underside or only on the bottom side on or against the grinding bowl holder and / or the grinding bowl opening is also freely accessible in the operating state - that is to say when the grinding bowl is held on the grinding bowl holder.
  • the clamping element is preferably designed to be axially adjustable for axially and / or radially bracing the grinding bowl on or against the grinding bowl holder. This also allows simple construction and / or good accessibility.
  • the tensioning element is preferably axially adjustable for axially relaxing or lifting the grinding bowl - that is, for releasing the grinding bowl from the grinding bowl holder. This enables very simple and, in particular, intuitive operation or a high level of operating comfort.
  • the tensioning element is preferably held only in its position holding or tensioning the grinding bowl by spring force, without the need for an actuator such as the motor and the eccentric shaft in DE 10 2012 009 987 A1 , causes the necessary force or preload or axial feed. This allows a simple structure and a reproducible bracing.
  • the tensioning element is axially adjustable, whereby by lowering the tensioning element or by axial movement of the An axial tensile force can be transmitted to at least one grinding bowl in a first direction via the clamping element in order to pull the grinding bowl downwards or in the first direction against the grinding bowl holder or to clamp the grinding bowl axially.
  • an axial lifting force can preferably be transmitted to the grinding bowl in order to lift the grinding bowl upwards from the grinding bowl holder or to axially relax the grinding bowl. After relaxing the grinding bowl, it can then be removed from the ball mill.
  • the ball mill according to the invention thus differs fundamentally from the ball mill known from DE 10 2012 009 987 A1, in which the clamping element, namely the eccentric shaft, transmits an axial compressive force to the grinding bowl, around the grinding bowl upwards against a stop of the cage-like grinding bowl holder to press and thereby to clamp axially.
  • the grinding bowl is then lowered by rotating the eccentric shaft and thus axially relaxed.
  • the tensioning device provided according to the invention enables a number of essential advantages.
  • the axial bracing of the grinding bowl by pulling the grinding bowl downwards creates the possibility of easy access to the grinding bowl from above and thus convenient sampling.
  • the grinding bowl can be braced and relaxed quickly and easily.
  • the bracing device provided in the ball mill according to the invention can be implemented in a simple manner with a small number of components.
  • a constructive design can be selected in which the clamping element, together with the grinding bowl holder, is rotatably mounted about the planetary axis to the carrier device and is carried by the ball mill around the center axis with little imbalance of the ball mill.
  • a plurality of grinding bowl holders or a plurality of grinding stations can be implemented in a simple manner, the grinding stations in particular being arranged symmetrically about the center axis in order to balance moments of inertia as well as possible, at least one clamping element is assigned to the grinding bowl holder and the clamping elements can be relaxed simultaneously.
  • the laboratory ball mill according to the invention can also be used for grinding bowls large on a laboratory scale, in particular with a size of more than 100 ml, more than 250 ml and / or up to about 500 ml per grinding cup or even larger, and enables a high grinding capacity.
  • a lifting drive is provided for lifting the tensioning element and for automatically actuating the relaxation of the grinding bowl.
  • the lifting force for lifting the tensioning element can be generated electrically, hydraulically or pneumatically.
  • the transmission of the lifting force to the tensioning element can take place, for example, with a (knee) lever mechanism, an eccentric tensioner and / or a spindle or rack winch.
  • a motor of a motorized lifting drive can be fixedly attached to a device housing of the ball mill, so that it does not rotate together with the carrier device, but is fixed when the ball mill is in operation.
  • a motor of the lifting drive does not have to be arranged laterally to the carrier device, but can also be arranged, for example, below the carrier device. This results in reduced lateral dimensions of the device housing of the ball mill according to the invention.
  • a lifting drive for lifting the tensioning element can also be designed to hold the tensioning element in a relief position, in which the grinding bowl is raised or relaxed relative to the grinding bowl holder. This means that the grinding bowls can be inserted and removed quickly and conveniently.
  • the lifting drive for the tensioning element actuates only the relaxation of the grinding bowl and, if appropriate, the holding of the grinding bowl in a relief position, but not the tensioning of the grinding bowl on the grinding bowl holder.
  • the axial tensile force to be transmitted to the grinding bowl to clamp the grinding bowl via the clamping element is then not provided by the lifting drive.
  • at least one spring element acting against the tensioning element can be provided, which is elastically deformed and preloaded when the tensioning element is raised.
  • the spring force of the prestressed spring element automatically causes the tensioning element to lower and, as a result, the clamping of the grinding bowl.
  • the lowering of the tensioning element is then effected only via the resilient spring element, the tensile force required for tightening the grinding bowl preferably being smaller than the restoring or spring force of the prestressed spring element.
  • a constructional design is also not ruled out, in which the relaxation of the grinding bowl is actuated manually, that is to say the lifting force required for lifting the clamping element and possibly the holding force for holding the clamping element in a relief position in which the grinding bowl is axially relaxed, is applied manually.
  • the manual power transmission can be carried out in a simple manner, for example with a lever mechanism, in particular a toggle lever mechanism, as is used in scissor-jacks.
  • the clamping element can preferably be held and / or supported on the grinding bowl holder and carried with it by the carrier device about the central axis when the carrier device rotates.
  • the tensioning element can be designed as a rod-shaped tie rod which extends coaxially to the planet axis and is axially displaceable in a shaft of the grinding bowl holder and is preferably arranged in a rotationally fixed manner relative to the shaft.
  • the shaft of the grinding bowl holder in turn can be rotatably mounted in a sun gear of the carrier device.
  • the grinding bowl holder can have a grinding bowl plate which is non-rotatably connected to the shaft and against which the grinding bowl with the clamping element is tightened when the grinding bowl is clamped until a frictional or non-rotatable connection between the grinding bowl and the grinding bowl plate is achieved.
  • the design of the tensioning element as a rod-shaped tie rod extending along the planet axis contributes to the fact that the ball mill according to the invention has a very low imbalance when the carrier device rotates.
  • the clamping element can be connected to a grinding bowl in a form-locking and / or frictional and non-destructive manner, for example via a bayonet connection.
  • the grinding bowl can have a connection area or holding section for releasable connection to the clamping element.
  • the grinding bowl When inserting the grinding bowl into the ball mill, the grinding bowl is placed from above onto the grinding bowl holder or the clamping element, put on and / or turned on. If a bayonet connection is provided between the grinding bowl and the clamping element, the grinding bowl can be rotated in order to align the contact surfaces of the bayonet until the grinding bowl and the clamping element are mechanically connected.
  • the connection is then preferably made via a plug and / or rotary movement.
  • the bayonet connection is preferably designed in such a way that the grinding bowl is only held axially on the tie rod. The grinding bowl is then connected to the tie rod only by a plug-and-turn movement.
  • a frictional connection can alternatively or additionally also be provided, wherein a friction coating, for example a rubber coating, can be provided on contact surfaces of the clamping element and / or contact surfaces of the grinding bowl.
  • a friction coating for example a rubber coating
  • Such a friction-locked coating can also be provided in addition if the grinding bowl and the clamping element are coupled via a bayonet connection.
  • the frictional engagement ensures that, after the bayonet catch has been formed, the grinding bowl does not unintentionally turn back into a position in which the tie rod only overlaps partial areas of an undercut on the grinding bowl or connection geometries of the bayonet connection on the grinding bowl and clamping element only overlap in some areas or reach over or behind in some areas, which could lead to the grinding bowl being destroyed.
  • Another variant provides a bayonet connection with magnetic means for positioning.
  • a corresponding bracing device can preferably be provided for each grinding bowl holder.
  • One clamping element each for axially holding or bracing a grinding bowl against the grinding bowl holder may be provided.
  • a common lifting device can be provided, wherein in a preferred embodiment the lifting device can have a lifting element arranged below the carrier device and in particular below the clamping elements, preferably a lifting plate. The lifting element can then act against the tensioning elements when lifting from below and transmit the lifting force required for lifting the tensioning elements and, if necessary, holding force to the tensioning elements.
  • a common motor drive can be provided for all clamping elements, which in particular automatically actuates only the relaxation of the grinding bowls and, if necessary, the holding of the grinding bowls in a relief position.
  • a coupling device For the power transmission of a motor to the lifting element, a coupling device can be provided, which is preferably also arranged below the carrier device and in particular below the lifting element.
  • the device housing of the ball mill according to the invention then has small lateral dimensions.
  • the lifting element is arranged in the device housing such that it cannot rotate and / or can be raised and lowered in the axial direction.
  • the lifting element In the clamped state of the grinding bowl, the lifting element is preferably kinematically decoupled from the rotary movement of the carrier device. This leads to a very low imbalance or rotating mass when operating the ball mill according to the invention.
  • the clamping element can also perform a safety function. This safety function can result from the property that the clamping element, when the grinding bowl is not inserted, can be lowered considerably more when tightening than when the grinding cup or bowls are inserted.
  • an advantageous further development of the invention provides that the tensioning element in a state not connected to a grinding bowl until a frictional and / or positive connection is formed with the lifting device, in particular the lifting element. and / or a stationary housing part of the ball mill can be lowered in order to brake and / or block a rotary movement of the carrier device. If the connection between the clamping element and the grinding bowl fails during grinding, the clamping element can also assume this or another collision position and fulfill an active braking function. This enables a self-monitoring and fail-safe design. No further elements are necessary to additionally monitor the safe position of the clamping element, in which the clamping element is properly connected to the grinding bowl. This enables cost advantages to be achieved.
  • an upward stop-free bracing of the grinding bowl is preferably provided on the grinding bowl holder.
  • a grinding chamber of the grinding bowl can be closed in the usual way by a grinding bowl cover connected to the grinding bowl.
  • the grinding bowl cover can be screwed to the grinding bowl, for example.
  • At least one anti-rotation element for example a locking pin, can be provided on the grinding bowl holder for the grinding bowl, whereby a grinding bowl position or specific rotational position of the grinding bowl relative to the clamping element is possible, in which the grinding bowl can be connected to the clamping element in a positive and / or frictional manner .
  • connection geometries can be provided, for example, in such a way that a connection of the anti-rotation element to the grinding bowl is formed at the same time when the grinding bowl has reached a lowered position or a position relative to the tensioning element after it has been plugged on and turned strike the connection geometries of a bayonet connection of grinding bowl and clamping element against each other and the bayonet connection forms.
  • Further partial aspects of the first aspect of the present invention relate to a ball mill on a laboratory scale, - Wherein the clamping element indirectly holds or engages the grinding bowl, and / or
  • the grinding bowl up against a device housing of the ball mill is non-stop on the grinding bowl holder or axially braced, and / or
  • clamping element is positively and / or frictionally and non-destructively releasably connectable to the grinding bowl, and / or
  • an axial tensile force can be transmitted to the grinding bowl by lowering the clamping element, in order to pull the grinding bowl down against the grinding bowl holder and to axially clamp the grinding bowl against the grinding bowl holder, and / or
  • an axial lifting force can be transmitted to the grinding bowl via the clamping element in order to lift the grinding bowl upwards from the grinding bowl holder and to axially relax the grinding bowl or to release the grinding bowl from the grinding bowl holder, and / or
  • At least one spring element acting against or on the tensioning element is provided, the spring element being preloaded when the tensioning element is raised and relieved when the tensioning element is lowered, and / or
  • the clamping element is held and / or supported on the grinding bowl holder and carried with it by the carrier device during the rotation of the carrier device about the center axis, and / or
  • the tensioning element is designed as a tie rod extending coaxially to the planet axis, and / or
  • a drive or a lifting device is provided for lifting the tensioning element and / or the grinding bowl, and / or
  • the lifting device has a lifting element arranged below the tensioning elements, the lifting element preferably acting against the tensioning elements from below during or for lifting, and / or #
  • the lifting element being arranged in a rotationally fixed manner and / or being able to be raised and lowered in the axial direction and / or the lifting element being kinematically decoupled from the rotary movement of the carrier device and / or the rotary movement of the grinding bowl holder in the tensioned state of the grinding bowl, and / or
  • the tensioning element in a friction and / or positive connection with the lifting device and / or a fixed housing part of the gel mill can be lowered in order to brake and / or block a rotary movement of the carrier device, and / or
  • At least two grinding bowl holders and at least two bracing devices each with a clamping element for axially bracing or holding a grinding bowl each against a grinding bowl holder, are provided, preferably with a common lifting device for simultaneously lifting several, preferably all, clamping elements, and / or
  • the tensioning element or the tensioning device has or forms a centering tensioner, and / or
  • the clamping element or the clamping device has a plurality of circumferentially distributed or radially movable holding elements for the friction or positive locking holding or centering of the grinding bowl, and / or
  • the ball mill has a grinding bowl which is provided on the bottom side with a holding section for holding on the floor side on or on the grinding bowl holder.
  • the holding section is ring-like or flange-like and / or radially protrudes preferably inwards, and / or
  • the holding section forms or delimits a recess or circumferential groove which is open radially inwards.
  • a second aspect of the present invention relates to a ball mill on a laboratory scale with a carrier device rotatably mounted about a central axis, with at least one grinding bowl holder for at least one grinding bowl, the grinding bowl holder being rotatably mounted on and / or in the carrier device and around it the center axis is carried along and, preferably, the grinding bowl holder is rotatably mounted about an offset planet axis to the carrier device, and wherein the grinding bowl holder has at least one clamping element for axially bracing the grinding bowl in and / or on or against the grinding bowl holder and the clamping element during the rotation - Hung the grinding bowl holder is carried by the carrier device around the center axis.
  • the grinding bowl cherhalterung correspondingly carried the clamping element from the grinding bowl holder or is also rotatable about the planet axis to the carrier device.
  • a laboratory ball mill with the features described above is already known from DE 10 2012 009 987 A1.
  • Laboratory-type ball mills of this type are used for a wide range of applications, for example for comminuting and mixing samples and / or for mechanical alloying.
  • Possible embodiments of laboratory ball mills, in particular designed as planetary and centrifugal ball mills, are described in DE 10 2012 009 987 A1.
  • DE 10 2012 009 987 A1 describes a planetary or centrifugal ball mill on a laboratory scale, in which the grinding container is axially clamped in a rigid cage in order to secure the grinding container in a grinding station for a grinding process.
  • the axial bracing is accomplished by means of an eccentric shaft extending transversely to the planet axis, which is rotatably mounted in a receiving device for the grinding bowl.
  • the eccentric shaft is located below an axially movable clamping base.
  • the tensioning base can be clamped upwards by a predefined length dimension against the grinding container by the eccentric shaft in order to clamp the grinding container in the cage axially from below against an upper transverse bridge.
  • the eccentric shaft transmits the tensioning force to the tensioning floor by means of needle bearings with which the eccentric shaft is mounted between a lower floor part and the tensioning floor.
  • the clamping base lifts a pressure plate upwards via a spring assembly, which in turn first moves an inserted grinding bowl against a pressure yoke, which acts as a stop for the grinding bowl lid until axial gaps are eliminated from the system.
  • a seal between the grinding bowl and the grinding bowl lid is compressed. If this is compressed up to a rigid flea stop, the clamping base compresses the disc springs on the remaining clamping path of the eccentric shaft in order to bring about the actual axial bracing force for the grinding vessel in the rigid cage.
  • the motor of a motor drive for an adjustment or rotation of the eccentric shaft is fixed to a device housing and does not rotate with the carrier device.
  • a coupling device is provided which, when the ball mill is at rest, with a certain rotational orientation of the grinding container, the motor drive to the eccentric shaft couples, so that the eccentric shaft can be actuated from outside the carrier device in the idle state. In this way, for example, electrical supply lines to the rotating carrier device can be avoided and even in a mill with several grinding stations, only one motor is required.
  • the coupling of the known laboratory mill comprises several interacting coupling parts of the motor drive and the eccentric shaft, which are to automatically interlock when the grinding station comes to rest in an insertion and removal position.
  • the coupling device is designed as a slot coupling, in which a pin running transversely to the eccentric shaft engages in a slot of a drive shaft running coaxially to the eccentric shaft when the grinding station is in the insertion and removal position.
  • the eccentric shaft can be rotated via the motor in order to automatically tension the grinding vessel axially or to automatically release the tension again.
  • a commercially available geared motor can be provided as the motor, which generates a torque on a drive shaft that is transmitted to the eccentric shaft.
  • the previously described bracing mechanism of the known laboratory mill provides a plurality of clamping elements for axially bracing a grinding bowl, which are rotatably mounted on the support device as part of a grinding bowl holder and are carried by the support device about the central axis when the support device is rotated.
  • the eccentric shaft is provided as a lifting element and clamping element for raising and lowering the clamping base, the spring assembly and the pressure plate as further clamping elements.
  • the eccentric shaft is used for power transmission and power transmission of the motor drive force to the further clamping elements.
  • the structural design of the bracing mechanism is mechanically complex.
  • a high number of rotating masses is provided by the cage with rotating eccentric shaft and the rotating further clamping elements provided during the grinding process for securing the grinding container, which makes balancing difficult and can lead to malfunctions during operation of the known laboratory mill.
  • a large moving mass of the clamping mechanism causes a greater bearing load and requires the use of high quality, expensive bearing components.
  • a further disadvantage is when the known bracing mechanism is used in planetary or centrifugal ball mills with several grinding stations.
  • Each grinding bowl holder has a separate bracing arrangement made up of an eccentric shaft and the other clamping elements. To clamp several grinding bowls, it is necessary to bring the grinding stations into the insert and removal positions in order to form the coupling between the motor drive and the eccentric shaft of the respective grinding station and then to clamp the grinding bowl of the respective grinding station. The bracing of several grinding bowls is therefore very time-consuming.
  • Another object of the present invention is to provide a laboratory ball mill of the type mentioned at the outset with a tightening and / or relaxing mechanism which has been developed further than the prior art for at least one grinding bowl in the grinding bowl holder, the tightening and / or relaxing mechanism in structurally simple way with high operational reliability, the forwarding and transmission of motor or possibly also manually generated clamping forces to the clamping element and the clamping forces required for clamping lead to a lower mechanical load on the construction of the grinding bowl holder.
  • the tensioning and / or relaxation mechanism should therefore be low-maintenance and allow the transmission of high clamping forces.
  • the relaxation and / or relaxation mechanism should offer the possibility of taking up little time and in a simple and convenient manner for the user. len way in planetary and centrifugal ball mills with several grinding stations to cause the clamping of the grinding bowls in the grinding bowl holders.
  • the ball mill according to the invention has a lifting device as part of a tensioning and / or relaxing mechanism with at least one lifting element for transmitting a motor-driven and / or manually generated clamping force to the at least one clamping element, the lifting element being kinematically dependent on the rotational movement of the carrier device and / or the rotary movement of the grinding bowl holder is decoupled.
  • a plurality of lifting elements can also be provided for transmitting a clamping force to the clamping element. When the carrier device rotates, the lifting element is not carried along about the center axis by the carrier device.
  • a “lifting element” in the sense of the invention is preferably a passive component which serves for the pure transmission and / or transmission of a motor or manual driving force to the tensioning element.
  • the driving force can be applied manually or via a motor drive unit.
  • the lifting element is preferably located substantially below the grinding bowl holder, more preferably below the clamping element, and is used in particular to transmit an axial lifting force to the clamping element.
  • An "axial" lifting force in the sense of the invention exists when the force vector is at least substantially parallel or coaxial (coaxial) to or with an axis of rotation of the grinding bowl holder and / or an axis of rotation of the tensioning element.
  • the lifting element can be permanently connected to a motor drive.
  • a connection to the motor drive can in particular also be present if the carrier device rotates about the center axis when the ball mill is in operation.
  • the invention is based on the idea of using a clamping element or lifting element which is at least essentially stationary with respect to the carrier device in order to transmit the clamping forces required for expanding and / or relaxing the grinding bowl in and / or on the grinding bowl holder for a relaxation and / or relaxation cooperates with at least one clamping element of the grinding bowl holder carried by the carrier device during operation of the ball mill.
  • a clamping element or lifting element which is at least essentially stationary with respect to the carrier device in order to transmit the clamping forces required for expanding and / or relaxing the grinding bowl in and / or on the grinding bowl holder for a relaxation and / or relaxation cooperates with at least one clamping element of the grinding bowl holder carried by the carrier device during operation of the ball mill.
  • an eccentric shaft which also rotates during operation of the ball mill serves for the transmission and transmission of motor-generated clamping forces.
  • the invention provides at least one lifting element which is kinematically decoupled from the rotary movement of the carrier device and is fixed during operation of the ball mill.
  • the invention thus permits a design of the tensioning and / or relaxation mechanism for the grinding bowl, which is characterized by a smaller number of components which are carried about the center axis by the carrier device during operation of the ball mill. Due to the lower rotating masses, a simple design is possible that is low-wear and therefore low-maintenance. Furthermore, the invention permits a structural design of the tensioning and / or relaxation mechanism, in which tensioning forces are absorbed in particular by the grinding bowl holder with less mechanical stress.
  • the tensioning and / or releasing mechanism can also provide the transmission of motor-generated clamping forces from a motor to the clamping element without a clutch, so that the disadvantages in connection with the use of a coupling device in the ball mill known from DE 10 2012 009 987 A1 can be avoided.
  • the grinding bowl holder is in particular designed exclusively for holding the grinding bowl on the underside or bottom and / or is axially adjustable for axially and / or radially bracing a grinding bowl on or against the grinding bowl holder and / or for axially and / or radially relaxing the grinding bowl.
  • This enables user-friendly attachment of the grinding bowl to, in, on and / or with the grinding bowl holder.
  • the design of the grinding bowl holder as a cage that can be loaded from the side which is known from DE 10 2012 009 987 A1
  • a particularly simple structural embodiment of the invention provides that the lifting element is guided and / or supported in a height-adjustable manner, in particular only essentially parallel and / or coaxially to a longitudinal or rotational axis of the grinding bowl holder, the grinding bowl and / or the clamping element, preferably in an at least substantially vertical direction.
  • the lifting force is then preferably transmitted to the tensioning element only by adjusting the height of the lifting element when they come into contact.
  • the lifting element can be designed, for example, as a lifting stone, which can be adjusted in height in the axial direction, preferably in at least substantially the vertical direction, via an adjusting or actuating element.
  • the lifting element as such is guided and / or supported so as to be adjustable transversely to the axis of rotation of the grinding bowl holder and / or the clamping element.
  • the lifting element can be designed, for example, as a push rod with an inclined run-up surface, the run-up slope being brought into contact with the tensioning element against the tensioning element during the adjustment movement of the push rod, and the tensioning element being raised or lowered depending on the direction of movement during the adjustment movement.
  • the lifting element can also be designed as an eccentric shaft which is rotatably arranged transversely to the longitudinal or rotational axis of the grinding bowl holder and / or the clamping element, an eccentric section of the eccentric shaft for transmitting the required clamping force with the clamping element in Contact occurs.
  • an eccentric shaft known from DE 10 2012 009 987 A1 for the transmission of clamping forces, however, in deviation from the known ball mill, a stationary arrangement of the eccentric shaft is proposed according to the invention, in which the eccentric shaft is kinematically different from the Turning movement of the carrier device and / or the rotary movement of the grinding bowl holder is decoupled.
  • a “lifting element” in the sense of the invention can also be an actuator or a linear motor, which preferably moves a force transmission element against the tensioning element in at least substantially a vertical direction and thus transmits the required force for lifting or lowering to the tensioning element .
  • the actuator or linear motor can be arranged below the tensioning element.
  • the axial lifting force from the lifting element only when a certain insertion and / or removal position of the carrier device has been reached, i.e. on reaching a certain insertion and / or removal position of the grinding bowl holder, i.e. when a certain rotational orientation of the carrier device is reached, is transferable.
  • the determined insertion and / or removal position is preferably reached when the tensioning element is located coaxially above the lifting element.
  • the lifting element In a properly clamped state of the grinding bowl on and / or in the grinding bowl holder, the lifting element is preferably spaced apart from the clamping element, so that a relative movement between the clamping element and thus the grinding bowl holder on the one hand and the lifting element on the other hand is possible in the circumferential direction of the circular path along which the grinding bowl holder is moved during operation of the ball mill.
  • the lifting element is then mechanically decoupled from the tensioning element, in particular there is no direct physical connection between the two components.
  • the tensioning element can be lowered or lowered relative to the lifting element in such a way that a positive and / or non-positive connection is formed between the tensioning element and the lifting element.
  • the lifting element is then mechanically coupled and / or can be coupled to the tensioning element and can fulfill a braking or stop function for the carrier device and / or the grinding bowl holder if the grinding bowl is not properly held on and / or in the grinding bowl holder.
  • the lifting device can have at least one adjusting element for transmitting a motor and / or manual driving force to the lifting element and for adjustment, in particular for lifting the lifting element.
  • the adjusting element is then also kinematically decoupled from the rotary movement of the carrier device and / or the rotary movement of the grinding bowl holder.
  • An adjustment movement of the adjustment element transversely to the longitudinal axis or axis of rotation of the grinding bowl holder and / or the tensioning element can particularly preferably lead to an adjustment movement of the lifting element.
  • the adjusting element can be designed as a spindle or push rod, the motor drive force of a drive motor possibly being transmitted to the spindle or push rod via a motor coupling and the lifting element being adjusted, preferably raised, by axial adjustment of the spindle or push rod. This enables a structurally simple transmission of high clamping forces.
  • An eccentric shaft which can be rotated relative to the lifting element and acts against the lifting element can also be provided as the adjusting element, the lifting element being able to be raised via an eccentric section of the eccentric shaft.
  • a lever can also be provided as the adjusting element in order to adjust, in particular to raise, at least one lifting element for transmitting tensioning forces with a reduced effort.
  • the adjustment element can be permanent, i.e. in particular when the support device rotates or the ball mill is operated, be mechanically connected to a motor drive, in particular without a clutch.
  • a coupling device for rigid, elastic, movable or releasable connection of the adjusting element to a motor drive can also be provided.
  • the motor drive can preferably be arranged laterally spaced from rotating components and / or vertically below the grinding bowl holder.
  • the drive is further preferably arranged in a stationary manner and kinematically decoupled from the rotary movement of the carrier device and / or the rotary movement of the grinding bowl holder.
  • manual actuation of the adjusting element is also possible using an adjusting tool or an adjusting handle.
  • At least one coupling element is expediently provided for the kinematic coupling of the adjusting element to the lifting element, wherein, preferably, the coupling element can be adjusted relative to the adjusting element by rotating the adjusting element.
  • the coupling element can, for example, be wedge-shaped with oblique and / or curved contact surfaces. These come into contact with the lever element during the translatory movement of the adjusting element, which can lead to the lifting element being raised.
  • a sliding or rolling contact can reduce frictional forces and enables the movement of the adjusting element to be coupled to the lifting element via the coupling element with little effort.
  • a low-friction coating and / or a hardened contact surface of the coupling element also simplify the kinematic coupling.
  • a corresponding contact surface can also be provided on the lifting element.
  • the lifting element can rest against the inclined or curved run-up surface on the coupling element via at least one roller, which rolls up and down along the run-up surface during the lifting movement of the lifting element.
  • the coupling element is preferably a separate component.
  • the adjusting element is direct, i.e. acts directly or abuts against the lifting element and has, for example, an oblique run-up surface which comes into operative contact with the lifting element during the adjustment movement of the adjusting element and, for example, lifts the lifting element to transmit the clamping force.
  • the coupling element is preferably adjustable on the adjusting element.
  • the adjusting element can be designed as a spindle with an external thread and the coupling element can have a threaded bore for a threaded section of the spindle. If the coupling element can only be adjusted in the linear direction, an adjustment movement of the coupling element along the axis of rotation of the spindle then occurs as a function of the thread pitch when the threaded spindle rotates.
  • the coupling element is also kinematically decoupled from the rotational movement of the carrier device and / or the rotational movement of the grinding bowl holder.
  • the lifting device can further comprise at least one lifting housing, the lifting element being guided and / or supported in the lifting housing, preferably adjustable in height and, more preferably, having play on the side.
  • the lifting housing can have a recess for the lifting element in which the lifting element is is preferably added axially adjustable in height. It is expedient if the lifting element is received and guided loosely in the recess, ie not tightly fitting. A lifting movement of the lifting element in the recess is thus possible without the risk of the lifting element becoming jammed.
  • the lifting housing is also kinematically decoupled from the rotary movement of the carrier device and / or the rotary movement of the grinding bowl holder.
  • the lifting housing as part of the lifting device is then not carried by the carrier device about the center axis during the rotational movement of the latter.
  • At least one abutment or support section can be provided on the lifting housing for forming an abutment for the grinding bowl holder.
  • the grinding bowl holder can have a holding section corresponding to the abutment section on the lifting housing.
  • the formation of an abutment requires the abutment section to come into contact with the holding section.
  • the formation of an abutment can in particular take place before the lifting element comes into contact with the tensioning element, also simultaneously or only afterwards.
  • the tensioning element is preferably raised only after the holding section on the grinding bowl holder bears against the abutment section on the lifting housing.
  • the abutment for the grinding bowl holder ensures that the lifting housing is held on the grinding bowl holder during the transmission of clamping forces and that the compressive forces transmitted from the lifting element to the clamping element and the counteracting forces on the abutment are essentially compensated.
  • the lifting housing is essentially not supported over the bottom of the mill, so that the tensioning or relaxing forces essentially do not have to be transmitted via the bearing means of the carrier device and the grinding bowl holder. In particular, essentially no vertical forces have to be absorbed by the adjusting element when the lifting element is raised.
  • the holding section on the grinding bowl holder can engage under and / or engage behind the abutment section on the lifting housing to form an abutment.
  • the abutment section on the lifting housing can engage under and / or behind a corresponding holding section on the grinding bowl holder.
  • the abutment section on the grinding bowl holder can be formed in a particularly advantageous manner at the lower end of a planetary shaft of the grinding bowl holder, for example as a shoulder projecting radially outwards.
  • An anchor-shaped or piston-shaped tensioning element can be guided axially or vertically adjustable in the planetary shaft.
  • a recess can be provided on the lifting housing, on which protrusions projecting radially inwards are formed, which form the abutment section on the lifting housing.
  • the lifting housing can be adjustable, in particular height-adjustable, relative to the grinding bowl holder to form the abutment. It is expedient if the design of the abutment is coupled to the achievement of a certain rotational orientation of the carrier device provided for inserting / removing a grinding bowl.
  • a corresponding height adjustability of the adjusting means and, if appropriate, a drive connected to the adjusting means is preferably provided for a height adjustment of the lifting housing.
  • a structural design of the tensioning and / or releasing mechanism can be provided such that the grinding bowl holder is carried along by the carrier device and freely past and / or in some areas in the lifting housing is moved.
  • the holding section is formed on a lower end of a planetary axle body, in which the tensioning element can be guided in a height-adjustable manner
  • the planetary axle body can engage with a lower end facing the lifting housing in a corresponding recess in the lifting housing and periodically pass through the recess when the carrier device rotates .
  • the recess in the circumferential direction of the carrier device can be designed to be open on both sides, so that the components cannot collide when the lower end of the planetary body passes through the lifting housing.
  • the holding and abutment geometries on the grinding bowl holder on the one hand and the lifting housing on the other are to be designed accordingly.
  • abutment sections can be formed on the lifting housing, for example, which cover only part of the width of the recess and / or part of the circumferential length of the Extend recess and are further preferably arranged opposite one another.
  • the lifting housing can preferably only be arranged in a height-adjustable manner relative to the grinding bowl holder and / or an axle body of the grinding bowl holder and fixed in a direction transverse to the axis of rotation of the grinding bowl holder and / or transverse to the axis of rotation of the clamping element or transverse to the axis of rotation of the carrier device be arranged.
  • a coupling element is provided for power transmission to the lifting element, the coupling element can be adjustably guided in and / or on the lifting housing and, preferably, moves in an direction transverse to the axis of rotation of the grinding bowl holder and / or to the axis of rotation of the clamping element during an adjustment movement relative to the lifting housing become.
  • the coupling element can be guided in and / or on the lifting housing by means of rollers. Sliding contact is also possible.
  • the lifting housing has a corresponding guide recess for the coupling element, in which the coupling element is guided with play, preferably loosely and not closely fitting.
  • a rotationally fixed guidance of the coupling element in the lifting housing is ensured by corresponding guide geometries on the lifting housing and / or on the coupling element.
  • the coupling element can preferably be raised or lowered together with the lifting housing.
  • the lifting or lowering of the lifting housing is preferably brought about by an adjustment movement of the coupling element or the movement of the coupling element relative to the adjustment element. If, for example, a threaded spindle is provided as the adjusting element, the coupling element provided with a threaded bore and penetrated by the threaded spindle being displaceable or displaceable in one direction only in the lifting housing, then it can move to the positively guided movement of the coupling element by rotating the threaded spindle along the spindle axis Raising or lowering the coupling element and thus also the lifting housing.
  • the lifting device can have a preferably stationary support element for the coupling element, on which the coupling element rests and to which the coupling element is relatively adjusted using the adjusting element.
  • the support element can provide at least two different height levels for the coupling element, the coupling element being adjusted with the adjusting element and sliding off from a first height level to a second height level during the adjustment together with the lifting housing. During the adjustment movement of the coupling element with the adjustment element, there is then automatically a change in height of the coupling element and the adjustment element and thus also a change in height of the lifting housing.
  • the lifting device By means of the lifting device provided according to the invention with a lifting element which is kinematically decoupled from the rotary movement of the carrier device and / or the rotary movement of the grinding bowl holder, the lifting device can be designed for the synchronous lifting and / or lowering of several clamping elements.
  • an adjustment element can be provided, the adjustment of which leads to the actuation, in particular to the lifting, of a plurality of lifting elements and thus to the synchronous raising and / or lowering of the clamping elements from a plurality of grinding stations.
  • a threaded spindle can be provided on which two coupling elements are guided so as to be movable in the axial direction.
  • Each coupling element interacts with a lifting element, the adjusting movement of the spindle, ie rotation of the spindle about the axis of rotation, leading to simultaneous contact of the coupling elements with the lifting elements, whereupon the lifting elements in turn come into contact with the clamping elements of two grinding bowl holders and can actuate the clamping elements, in particular lift them.
  • the coupling elements can have threaded bores and, correspondingly, the threaded spindle with different thread sections Have direction of rotation, so that there is an adjustment movement of the two coupling elements in the opposite direction when the threaded spindle rotates.
  • a spindle that has a left-handed and a right-handed external thread section can be used as an adjusting element together with coupling elements that have corresponding internal thread bores with different directions of rotation.
  • a preferred embodiment of the mill according to the invention has at least two grinding bowl brackets and at least two bracing devices, each with a clamping element for axially holding or bracing a grinding bowl each on or against the one grinding bowl holder and / or in each grinding bowl holder and / or for axial relaxation , in particular wherein the common lifting device is provided for the simultaneous and / or synchronous lifting and / or lowering of several, preferably all, clamping elements.
  • the common lifting device is provided for the simultaneous and / or synchronous lifting and / or lowering of several, preferably all, clamping elements.
  • several adjustment elements can be provided in order to be able to adjust several coupling elements independently of one another if necessary.
  • the threads can also be designed in the same direction, so that both coupling elements are adjusted in the same direction during an adjustment movement of the adjustment element.
  • the adjusting element is kinematically decoupled from the rotational movement of the carrier device and / or the rotational movement of the grinding bowl holder, and / or
  • Adjusting element is provided with the lifting element, wherein, preferably, the coupling element is adjusted by rotating the adjusting element relative to the adjusting element, and that the coupling element is kinematically decoupled from the rotational movement of the carrier device and / or the rotational movement of the grinding bowl holder, and / or
  • the lifting device has at least one lifting housing and that the lifting element is guided and / or supported in the lifting housing, preferably adjustable in height and, more preferably, laterally with play, and / or
  • the lifting housing is kinematically decoupled from the rotational movement of the carrier device and / or the rotational movement of the grinding bowl holder, and / or
  • At least one abutment section (is provided on the lifting housing to form an abutment for the grinding bowl holder, and / or
  • the coupling element is adjustable in and / or on the lifting housing, preferably relative to the lifting housing in a direction transverse to
  • the coupling element can be raised or lowered together with the lifting housing, wherein, preferably, the raising or lowering is brought about by an adjustment movement of the coupling element relative to the adjustment element, and / or
  • a third aspect of the present invention relates to a ball mill on a laboratory scale, in particular in the form of a centrifugal ball mill and / or planetary ball mill, with at least one grinding bowl holder for at least one grinding bowl that can be closed with a grinding bowl lid, with a clamping device with at least one clamping element for axial holding or axial clamping of the grinding bowl on or against the grinding bowl holder and / or for the axial relaxation of the grinding bowl, and, preferably, with a support device rotatably mounted about a central axis, the grinding bowl holder being rotatably mounted about an offset planetary axis to the support device and being carried by the latter around the central axis becomes. Furthermore, the present invention relates to a grinding bowl for a laboratory mill according to one of the preceding claims.
  • Laboratory ball mills according to the invention can be designed as planetary or centrifugal mono ball mills with only one grinding station or also as ball mills with several grinding stations, the grinding stations preferably being arranged symmetrically about the center axis in order to compensate moments of inertia as well as possible.
  • DE 10 2012 009 987 A1 discloses a laboratory ball mill. This has a carrier device which rotates about a vertical center axis. On the carrier device, a plurality of grinding stations are rotatably mounted to the carrier device about a planet axis offset parallel to the center axis, each grinding station having a cage-like receiving device for at least one grinding bowl which can be filled with grinding stock and grinding media, in particular grinding balls. Each receiving device is carried about the center axis by the carrier device and additionally rotates - mostly in the opposite direction - to the carrier device about the respective planet axis.
  • the laboratory ball mill described in DE 10 2012 009 987 A1 has a tensioning device with a tensioning element for axially tensioning a grinding bowl in the receiving device and a motor drive for the tensioning element, which automatically actuates the tensioning of the grinding bowl in the receiving device.
  • the axial bracing is accomplished by means of an eccentric axle body extending transversely to the planet axis as a clamping element, which is rotatably mounted in the receiving device for the grinding bowl.
  • the ball mill has a motor which is fixed to a device housing outside of the carrier device. The motor drives a drive axle body that is slotted at its end so that it can be coupled to the eccentric axle body.
  • Coupling to the eccentric axle bodies is only possible if the grinding station is in a specific insertion and removal position and in the correct rotational orientation.
  • the eccentric axle body can then be rotated via the motor, whereby an axial change in height of the eccentric axle body is transmitted via a plate spring to a spring-loaded pressure plate which lifts the grinding bowl until it abuts with a grinding bowl cover against a stop on the holding device. By turning back the eccentric axle bodies, it is possible to release the tension again.
  • the known ball mill has a complex construction. Another disadvantage is that it is difficult to couple the motor to the eccentric axle body to tension / relax the grinding bowl. Since the eccentric axle body is mounted in the holder for the grinding bowl, the eccentric axle body also rotates during operation of the ball mill, which leads to unbalance effects, which lead to vibrations and increased wear.
  • the design of the receiving device as a rigid cage makes it accessible to the grinding bowl highly limited. To take a sample, it is always necessary to remove the grinding bowl from the cage. Therefore, the operation of the known ball mill is not very user-friendly.
  • tensioning and relaxing a grinding bowl on the grinding bowl holder should be quicker and less expensive.
  • the ball mill should preferably have a simple construction.
  • the imbalance when operating the ball mill should be low.
  • a further aspect of the invention relates to the top accessibility of the grinding bowl lid in the tensioned state of the grinding bowl while maintaining the state of tension, the tensioning device being designed such that the tensioning cup cover is not subjected to a tensioning force from above when the grinding bowl is tensioned.
  • the grinding bowl according to the invention has at least one jacket-side holding means for a stop on the grinding bowl holder of the ball mill.
  • grinding bowl is used in the following for grinding vessels whose grinding bowl is clamped or held directly on the grinding bowl holder and grinding vessels in which a grinding bowl is clamped or held as a separate component on the grinding bowl holder via a grinding bowl adapter.
  • the clamping and / or holding force for axially bracing or holding the grinding bowl on or against the grinding bowl holder is consequently only applied in the area of a lateral surface and / or over the bottom of the grinding bowl, but not over the grinding bowl cover.
  • the grinding bowl cover is thus freely accessible from the clamping device on the cover side, that is to say from above. This makes it easy to take samples even when the grinding bowl is clamped, without having to remove it from the grinding bowl holder.
  • the grinding bowl lid can be releasably connected to the grinding bowl by means of clamping and / or screwing means known per se from the prior art.
  • the bracing device serves to hold or axially brace the grinding bowl on or against the grinding bowl holder and / or to axially relax the grinding bowl and is thus to be distinguished from the bracing of the grinding bowl cover against the grinding bowl, which is inherently from the state of the art Technology known clamping or screwing can be done.
  • the tensioning element is designed to transmit a clamping force to the grinding bowl on the shell side and / or on the bottom or bottom side.
  • a simple constructive embodiment of the invention provides that the clamping element is designed to be axially adjustable for axially and / or radially bracing the grinding bowl on or against the grinding bowl holder and / or for axially and / or radially releasing the grinding bowl.
  • the clamping element is adjusted relative to the grinding bowl holder.
  • the clamping element is raised or clamped up to clamp the grinding bowl and lowered or pulled down to relax the grinding cup.
  • a constructional design is not excluded in such a way that the clamping element is lowered or pulled down to brace the grinding bowl and raised or pressed up to relax the grinding bowl.
  • the tensioning element can be spring-loaded via at least one spring element.
  • the clamping force required to clamp the grinding bowl is preferably applied only via the spring element. To relax the grinding bowl, it is then necessary to move the tensioning element against the spring force of the spring element from a first position, in which the grinding bowl cup is clamped, to a second position, in which the grinding bowl is relaxed.
  • the adjustment force required for this can be generated with a motor drive or manually. In another configuration, on the other hand, it can also be provided that the clamping force required to clamp the grinding bowl is applied via a motor drive. After a motorized release of the clamping element, in which there is no power transmission from the motor drive to the clamping element, the clamping element can then be brought into a position in at least one spring element in which the grinding bowl is relaxed.
  • the grinding bowl holder has at least one stop as an abutment for at least one protruding holding means of the grinding bowl formed on the outer circumference of the grinding bowl, the grinding bowl via the stop and the holding means in the axial direction and, preferably, in the circumferential direction during the transfer of the Bracing force on or against the grinding bowl holder is clamped or held.
  • the transfer of the clamping force from the clamping element to the grinding bowl then leads to the fact that the folding projection is adjusted together with the grinding bowl in the axial direction and is pressed against the stop. Due to a complementary geometry of the stop and the folding projection, the grinding bowl can be automatically centered when it is transferred from a relaxed state to a tensioned state with the clamping element.
  • the stop can preferably be provided in the area of the outer circumference of the grinding bowl holder.
  • the grinding bowl holder can further preferably have a plurality of stops as an abutment for a plurality of folding projections on the grinding bowl, a particularly circular insertion region for the grinding bowl being formed between the stops.
  • the grinding bowl can then be easily inserted from above into the insertion area between the stops of the grinding bowl holder and then braced.
  • the stop on the grinding bowl holder can be in relation to the grinding bowl held in or on the grinding bowl holder in the region below half the height, preferably in the region of the lower third of the height of the grinding bowl be provided in the area of the grinding bowl near the bottom.
  • the grinding bowl has at least one holding projection as a holding means, which cooperates with the stop when the grinding bowl is clamped.
  • the grinding bowl is then freely accessible from above and, preferably, on the casing side, manual access to the grinding bowl in this area not being impaired by parts of the grinding bowl bracing and / or the bracing device.
  • the grinding bowl holder can have at least one further stop, which limits the rotational movement of the grinding bowl in the circumferential direction of the grinding bowl holder.
  • the further stop preferably interacts with the holding means on the outer circumference of the grinding bowl.
  • the holding means can be brought into contact with the further stop by rotating the grinding bowl relative to the grinding bowl holder.
  • This allows the grinding bowl in the relaxed state by rotating relative to the grinding bowl holder in a simple manner in a position in which the grinding bowl is subsequently braced by transmission of the clamping force on or against the grinding bowl holder and, preferably, due to the axial movement of the grinding bowl at the Bracing is automatically centered relative to the grinding bowl holder.
  • the stop on the grinding bowl holder and the holding means on the grinding bowl can have such complementary geometries that a positive connection acting in the axial direction and preferably in the circumferential direction between the grinding bowl and the grinding bowl holder in the clamped state of the grinding bowl is achieved via the stop and the holding means. This ensures that the grinding bowl is securely attached to the grinding bowl holder when it is clamped.
  • the grinding bowl holder and the grinding bowl can have complementary locking means, whereby, preferably, the locking means for forming a locking connection when a certain rotational position of the grinding bowl is reached relative to the grinding bowl holder, and, more preferably, for forming the locking connection before the grinding bowl is braced on or are formed against the grinding bowl holder.
  • At least one ball thrust piece can be provided on the grinding bowl holder, preferably on the jacket side of the grinding bowl, which engages in an opening or recess on the outer circumference of the grinding bowl when a certain rotational position of the grinding bowl is reached.
  • a specific rotational position of the grinding bowl can thus be found in a simple manner if the grinding bowl is still in the relaxed state, that is to say no tensioning force has yet been transmitted to the grinding bowl.
  • a snap-in and / or interlocking connection between the grinding bowl holder and the grinding bowl makes it easy to ensure that the grinding bowl is not inadvertently moved relative to the grinding bowl holder before being braced.
  • a structurally simple embodiment of the invention provides that the grinding bowl holder has at least one tab arranged on the outer circumference of the grinding bowl holder, the stop being integrated in the tab.
  • a recess can be provided in the tab, into which the above holding means on the grinding bowl can be screwed in relative to the grinding bowl holder after the grinding bowl has been inserted into and / or the grinding bowl has been placed on the grinding bowl holder by rotating the grinding bowl.
  • the holding means can then be clamped against the stop in the tab.
  • an axially adjustable one Slider can be provided, which can be kinematically coupled to the grinding bowl and, preferably, can be raised and / or lowered with the holding means provided on the grinding bowl, the slide forming a mechanical stop when the grinding bowl is not or not properly inserted, so that rotation of the grinding bowl holder is excluded is.
  • This turns one Carrier device for the grinding bowl holder and thus improper operation of the laboratory mill effectively prevented.
  • the grinding bowl holder has a plurality of stops as an abutment for the grinding bowl, an insertion area for the grinding bowl being formed between the stops, and / or
  • Grinding jar preferably in the region of the lower third of the height of the grinding jar, further preferably in the area near the floor, is subjected to a bracing force and / or holding force, and / or
  • the grinding bowl holder has at least one tab arranged on the outer circumference of the grinding bowl holder, the stop being integrated in the tab, and / or
  • the grinding bowl holder and the grinding bowl have complementary locking means, and that, preferably, the locking means are provided when the grinding bowl has reached a certain rotational position relative to the grinding bowl holder before the grinding bowl is braced on or against the grinding bowl holder to form a locking connection, and / or
  • At least one locking means is integrated in the tab, and / or
  • an axially adjustable slide which can be kinematically coupled to the grinding bowl and, preferably, can be raised and / or lowered via the holding means on the grinding bowl, the slide forming a mechanical stop when the grinding bowl is not or not properly inserted, so that a Rotation of the grinding bowl holder is excluded.
  • FIG. 1 shows a schematic section of a ball mill according to the invention with two grinding stations arranged opposite one another according to a first exemplary embodiment
  • Fig. 2 is a side view of a clamping element for axial bracing
  • FIG. 3 shows a perspective view of the tensioning element from FIG. 2,
  • FIG. 4 shows an end view of the tensioning element from FIG. 2
  • FIG. 5 shows a section of an auxiliary disk which can be connected to a grinding bowl and which has a connection geometry for connection to the tensioning element from FIG. 2,
  • FIG. 6 is a plan view of the reed plate from FIG. 5,
  • FIG. 7 shows a schematic section of the ball mill according to the invention with a grinding bowl according to the invention in accordance with a second exemplary embodiment
  • FIG. 8 shows a perspective view of a ball mill according to the invention with two grinding bowl holders
  • FIG. 9 is a plan view of the ball mill from FIG. 8
  • FIG. 10 is a partial sectional view of the ball mill from FIG. 8 along the section line III-III from FIG. 2, the grinding bowl holders being shown in a clamped state
  • 11 is a partial sectional view of the ball mill from FIG. 8, which shows the right grinding bowl holder and part of a fluffing device for the grinding bowl holder in a relaxed state of the grinding bowl holder
  • Fig. 12 is a sectional view of the ball mill of Fig. 8 along the section line V-V of Fig. 9 and
  • FIG. 13 shows the detail VI from FIG. 12 in an enlarged view
  • FIGS. 17 to 19 are perspective views of an arrangement for a ball mill, the arrangement comprising a grinding bowl holder and a bracing device, designed for axially holding or axially bracing one in the FIGS. 17 to 19 shown grinding bowl adapter on or against the grinding bowl holder and for axially relaxing the grinding bowl;
  • FIG. 15 is a plan view of the arrangement of FIG. 14,
  • Fig. 16 is a sectional view taken along the line III - III of Fig. 15, one with the
  • FIG. 17 shows a side view of the arrangement shown in FIG. 14, consisting of a grinding bowl holder and bracing device in the direction of arrow IV from FIG. 14, a grinding bowl adapter connected to the arrangement being shown for a grinding bowl, not shown,
  • Fig. 18 is a sectional view of the arrangement shown in Fig. 17 along the
  • FIG. 19 shows a partial sectional view of the arrangement from FIG. 17 along the sectional plane VI from FIG. 18.
  • 1 to 7 show a proposed ball mill according to a first aspect of the invention.
  • Fig. 1 shows a schematic section of a proposed ball mill 1 according to a first embodiment with one or more, in particular two grinding stations 2, which are preferably constructed identically.
  • the ball mill 1 is preferably designed as a laboratory mill or planetary ball mill.
  • the invention is explained below using the example of a ball mill 1 with two grinding stations 2.
  • the description of the features of the ball mill 1 is not limited to ball mills 1 with two grinding stations 2, but is equally valid for laboratory ball mills with more than two grinding stations 2 or also for planetary mono ball mills. Due to the preferably identical construction of the grinding stations 2, the features and components of the ball mill 1 or grinding stations 2 are primarily described below using the example of the grinding station 2 shown on the left in FIG. 1.
  • the grinding station 2 has a grinding bowl holder 3 for a grinding bowl 4.
  • the grinding bowl 4 is optionally provided with a reed disk or an end piece or base element 5, preferably via a plurality of screws 6, or is permanently connected.
  • the grinding bowl 4 and the auxiliary disc or the base element 5 can in principle also be formed in one piece. Accordingly, either the auxiliary disc or the base element 5 or the grinding bowl 4 can form the end face or the grinding bowl end with which the grinding bowl 4 sits or is held on the grinding bowl holder 3 in the operating state - that is, as shown in FIG. 1.
  • the grinding bowl holder 3 is rotatably mounted about a vertical planet axis Y1 to or on a carrier device 7.
  • the carrier device 7 has a sun gear 8, which can be rotated about a central axis Y2, preferably a central bearing shaft 9, and in particular is rotatably supported via bearings 9a.
  • the grinding bowl holder 3 is preferably rotatable via a shaft 10 or bearing or roller bearing 10a, in particular mounted on or in the sun gear 8.
  • the carrier device 7 or the sun gear 8 is preferably driven by an electric drive motor (not shown) or preferably by means of a belt drive 11a, which is only indicated.
  • the carrier device 7 or the sun gear 8 rotates, the grinding bowl holder 3 is carried about the center axis Y2.
  • the (rotary) drive of the grinding stations 2 or shafts 9 preferably takes place via a rotary coupling or belt coupling 11b, as indicated by belt wheels 11c and 11d.
  • the two grinding stations 2 lie opposite one another with respect to the center axis Y2, so that their moments of inertia are compensated for.
  • the grinding bowl holder 3 preferably has a grinding bowl plate 12 for holding the grinding bowl 4.
  • a grinding bowl plate 12 for holding the grinding bowl 4.
  • the tensioning device 14 has the tensioning element 13.
  • the clamping element 13 preferably extends coaxially to the planet axis Y1, the longitudinal axis of the clamping element 13 and the planet axis Y1 coinciding.
  • the clamping element 13 is preferably connected in a rotationally fixed manner to the shaft 10 of the grinding bowl holder 3, but is guided in an axially movable manner on or in the shaft 10, as shown schematically by the arrow or the lifting movement H in FIG. 1.
  • an axial holding or pulling force can be transmitted to the grinding bowl 4 via the tensioning element 13 and the optional auxiliary disk 5.
  • the holding or tensile force causes the grinding bowl 4 (via or with the auxiliary disk 5) downwards against the grinding bowl plate 12 of the grinding bowl holder 3 is held or pulled and therefore the grinding bowl 4 is held or axially clamped in particular only on the bottom or bottom side against or on the grinding bowl holder 3.
  • the grinding bowl 4 or the auxiliary disc 5, if present, is seated with the bottom or underside, in particular with contact and centering surfaces 16, on the grinding bowl holder 3 or the grinding bowl plate 12 , particularly preferably on contact and centering surfaces 15 formed therefrom.
  • the grinding bowl holder 3 and the grinding bowl 4 or the contact and centering surfaces 15, 16 are adapted to one another and / or are designed to be complementary in such a way that radial grinding of the grinding bowl 4 on the grinding bowl holder 3 or to the planetary axis Y1 or shaft 10 and / or a preferably positive rotational driving or rotating coupling takes place.
  • the centering and / or rotary coupling can also take place by the axial holding or tensioning and / or an engagement of the tensioning element 13 or the tensioning device 14 on the grinding bowl 4 or its auxiliary disk 5.
  • one or more engagement elements such as a pin or anti-rotation element 26, for desired positioning, centering and / or rotational coupling between the grinding bowl 4 or its auxiliary disk 5 on the one hand and the grinding bowl holder 3 or its grinding bowl plate 12 on the other hand be used.
  • the clamping element 13 is raised to relax or loosen the grinding bowl 4 from the grinding bowl holder 3.
  • the grinding bowl 4 can then be rotated and thereby released from an engagement of the tensioning element 13 or the tensioning device 14.
  • an axial lifting force is preferably transmitted to the grinding bowl 4 via the clamping element 13, which leads to the grinding bowl 4 (with the auxiliary disk 5 if present) being raised from the grinding bowl plate 12 of the grinding bowl holder 3 and / or the grinding bowl 4 axially released or relaxed.
  • a force preferably acts against the clamping element 13 from below and lifts it up relative to the contact and centering surfaces 15, 16 of the grinding bowl plate 12 and the auxiliary disk 5.
  • An optional holder or pot 17 is used here to receive or hold one or more springs, in particular plate springs 18, for axially pretensioning or moving the tensioning element 13 downwards or into the holding or tensioning position.
  • the clamping element 13 is preferably in particular firmly connected to the holder or pot 17, so that a relative movement between the clamping element 13 and the holder or pot 17 in the axial direction is not possible.
  • plate springs 18 instead of plate springs 18, other means for storing potential energy, for example a gas pressure spring, can also be provided.
  • an optional sleeve 19 is arranged between the springs 18 and the shaft 10.
  • the plate spring assembly lies radially on the inside, preferably against the inner ring of the lower roller bearings 10a shown in FIG. 1, via which the shaft 10 is supported in the sun gear 8.
  • the springs 18 can therefore preferably rotate together with the grinding bowl holder 3, the shaft 10 and the tensioning element 13 as well as the pot and / or the pulley 11 c.
  • the plate springs 18 are preloaded or tensioned further. If the grinding bowl 4 (with the auxiliary disk 5) is raised sufficiently far that the grinding bowl 4 with the auxiliary disk 5 can be rotated relative to the grinding bowl plate 12 or rotated by the latter and / or the clamping element 13 or the clamping device 14 can be released. the grinding bowl 4 with the auxiliary disk 5 can be removed from the ball mill 1 and optionally a new grinding bowl 4 can be inserted into the ball mill 1.
  • the clamping element 13 can preferably be connected to the auxiliary disk 5 or the grinding bowl 4 by means of a bayonet connection by means of a combined plug-in and rotary movement.
  • the auxiliary disc 5 or the grinding bowl 4 preferably has a connection on the underside. binding area or section 21 for releasable connection with the tensioning element 13 or for an engagement or engagement of the tensioning device 14.
  • Preferred connection geometries of the tensioning element 13 and auxiliary disk 5 are shown in detail in FIGS. 2 to 6.
  • FIGS. 2 to 4 show the tensioning element 13, which is preferably designed as a tie rod.
  • the tensioning element 13 has at least one engagement section or a first connection geometry, in the present case preferably three radial connection projections 20, which are spaced apart in the circumferential direction.
  • the connecting area is provided, in particular in the form of one or more, preferably complementary, connecting projections or sections 21, which interact when connecting with the tensioning element 13 or its connecting projections 20, in particular for axially positive locking of the clamping element 13 or the clamping device 14 are axially overlapped.
  • the ball mill 1 or tensioning device 14 preferably has a lifting device 22 for axially moving or lifting the tensioning element 13 or for automatically actuating or relieving or releasing the grinding bowl 4 from the grinding bowl holder 3.
  • the lifting device 22 can act with an axial force (lifting force) on the tensioning element 13, for example by means of a lifting element 23, with the tensioning elements 13 being shown in FIG. 1 only in the lowered state or in the tensioned state or the state holding the grinding element 4 are.
  • the grinding bowl 4 is connected to the clamping element 13 by placing the grinding bowl 4 (with the auxiliary disk 5) on the contact and centering surfaces 15 on the upper side of the grinding bowl plate 12, the grinding bowl 4 with the auxiliary disk 5 to form a bayonet connection (for axial aligned alignment or overlap of the connecting projections 20, 21) is rotated in the mounted state relative to the grinding bowl plate 12.
  • the grinding bowl 4 with the auxiliary disk 5 must preferably be lifted upwards from the grinding bowl plate 12 - in particular with the clamping element 13 - and axially relaxed.
  • a lifting device 22 is provided, which preferably has a lifting element 23 arranged below the tensioning elements 13 and, for example, designed as a lifting plate.
  • An electrical, hydraulic and / or also pneumatic drive can be provided for lifting the lifting element 23 or tensioning element 13 or for the lifting device 22.
  • the drive then serves to automatically actuate the relaxation of one, several or all of the grinding bowls 4 and is, preferably, designed to hold the tensioning elements 13 in a relief position in which the grinding bowls 4 are axially relaxed. This enables the grinding bowls 4 to be inserted and removed in a simple and convenient manner.
  • the grinding bowls 4 can be opened at the same time in the inserted state and thus allow convenient sampling at any time during the grinding.
  • the grinding bowls 4 do not have to be removed for this.
  • the drive with the drive elements such as an electric motor, can be arranged below the lifting element 23.
  • a variety of different mechanisms can be used to transmit the lifting force for the relaxation of the grinding bowls 4 to the lifting element 23 when the lifting device 22 is positioned in a fixed position.
  • the Lifting force of a drive with a toggle lever mechanism, a coupling with an eccentric tensioner or a spindle or rack winch are transmitted to the lifting element 23.
  • the lifting element 23 is preferably connected to the clamping elements 13 only in the relaxed state of the grinding bowl 4.
  • the mechanism which exerts the lifting force on the clamping elements 13 is preferably completely decoupled from the rotation of the components of the ball mill 1. Due to fewer rotating components, the unbalance or rotating mass during the operation of the ball mill 1 is significantly reduced.
  • the tensile force required to brace the grinding bowls 4 on the grinding bowl holders 3 is preferably generated exclusively via the plate springs 18 and transmitted to the clamping elements 13.
  • the drive provided for lifting the clamping elements 13 and for the axial relaxation of the grinding bowls 4 then makes no contribution to the tensile or clamping force required for the clamping of the grinding bowls 4.
  • the drive is therefore preferably not involved in the tensioning of the grinding bowls 4.
  • the lifting element 23 preferably does not extend in the radial direction beyond the tensioning elements 13, in any case preferably not in the radial direction beyond the sun gear 8. This results in a space-saving construction of the ball mill 1.
  • the drive components of the drive for generating the lifting force are preferably arranged below the lifting element 23 and not laterally. This also contributes to a small size of the ball mill 1 in the lateral direction. Access to the grinding stations 2 is very good for the user. Due to the few exposed components, the cleaning of the components of the ball mill 1 is simplified.
  • the grinding bowl 4 is preferably closed by a grinding bowl cover 24, which is preferably screwed on.
  • One or more valves 25 are preferably provided in the grinding bowl cover 24.
  • the clamping elements 13 can also perform a safety function in addition to the bracing of the grinding bowls 4.
  • “Inserting” in the sense of the invention is understood to mean placing the respective grinding bowl 4 (with the auxiliary disk 5) on the contact and centering surfaces 15 of the grinding bowl plate 12.
  • the respective clamping element 13 can be lowered further, so that the clamping element 13 is in a frictional and / or positive connection with the lifting device 22, in particular with the lifting element 23, and / or get with a fixed housing part of the ball mill 1 and thus a start of the ball mill 1 can be prevented by mechanically blocking the rotary movement.
  • the stabilizing element 13 can then perform an active braking function by prestressing the plate springs 18. It can thus also be ensured that both grinding bowls 4 must always be inserted and braced in the ball mill 1 in order to put the mill 1 into operation. A securely clamped grinding bowl 4 can thus be detected without the need for further sensors or elements in order to monitor the reliable position of the clamping elements 13.
  • a constructive embodiment can be realized in which the clamping element 13 also assumes a more lowered position when the bayonet connection between the clamping element 13 and the grinding bowl 4 fails during grinding and in frictional and / or positive contact with the lifting device 22, in particular the lifting element 23.
  • the illustrated and described bracing of the grinding bowls 4 against the grinding bowl holders 3 by pulling or holding the grinding bowls 4 against the grinding bowl holders 3 with the tensioning elements 13 preferably permits a self-monitoring and fail-safe construction, whereby when the grinding bowl is not inserted and / or when the connection between a clamping element 13 and a grinding bowl 4 a position of the clamping element 13 is assumed in each machine state, in which the ball mill 1 is automatically transferred to a safe operating state.
  • An anti-rotation pin or element 26 can be provided, as indicated schematically on the right-hand side in FIG. 1, in order to prevent unwanted rotation. to prevent nes grinding bowl 4 during grinding. Such an anti-rotation function is advantageous for the stability of the connection between the grinding bowl 4 and the clamping element 13. Moreover, by using one or more anti-rotation pins or elements 26, a torque can be safely transmitted to the grinding bowl 4 at high loads.
  • an anti-rotation pin 26 is structurally possible to arrange an anti-rotation pin 26 in such a way that the positioning of the grinding bowl 4 in the correct rotational position relative to the grinding bowl plate 12 or clamping element 13 is simplified, or a complete axial placement of the grinding bowl 4 is only possible, for example, when the bayonet connection has been made.
  • the anti-rotation pin 26, which can be provided, for example, on the underside of the auxiliary disk 5, can be lowered into a corresponding bore in the grinding bowl plate 12 only when the rotating position of the grinding bowl 4 relative to the clamping element 13 results in an essentially complete overlay the connecting projections 20, 21 leads.
  • a second exemplary embodiment of the proposed ball mill 1 and of the proposed grinding bowl 4 is explained in more detail with reference to the schematic section in FIG. 7, the previous explanations and explanations in particular correspondingly or additionally being applicable.
  • FIG. 7 shows the ball mill 1 in the area of only one grinding station 2, other parts, such as the sun wheel 8, having been omitted for reasons of clarity.
  • the grinding bowl 4 is preferably (at least essentially) held or clamped by the grinding cup holder 3, the tensioning device 14 or the tensioning element 13 only at the bottom or bottom, in particular against or against the grinding bowl holder 3 or its grinding bowl plate 12, as shown.
  • the grinding bowl 4 is preferably held in a form-fitting manner in the axial and / or radial direction in the clamped state or holding state.
  • the clamping element 13 or the clamping device 14 preferably has at least one radially movable holding element 27 for holding or centering the grinding bowl 4.
  • a plurality of holding elements 27 are preferably provided and in particular (evenly) distributed over the circumference. This is particularly conducive to a desired centering and / or clamping or holding distributed over the circumference.
  • a centering vice can be formed.
  • the holding elements 27 are moved or preloaded radially in particular outwards, preferably in order to engage in a recess or groove or circumferential groove 28 and / or to engage behind or overlap the holding or connecting section 21 and / or to radially engage against a wall 29 of the grinding bowl 4 (or a bottom element or end piece of the grinding bowl 4 formed by the auxiliary disk 5 or the like) or to press on.
  • the wall 29 preferably surrounds the holding elements 27 and / or delimits the recess or groove 28.
  • the recess or circumferential groove 28 is preferably open radially inwards.
  • the holding or connecting section 21 preferably delimits the recess or groove 28 in the axial direction and / or downwards.
  • the holding or connecting section 21 is preferably ring-like or flange-like and / or projects radially, in particular inwards.
  • the holding or connecting section 21 preferably forms an axial stop and / or a preferably circumferential shoulder, in particular for one or more holding elements 27, alternatively for a connecting projection 20 of the tensioning element 13 according to the first exemplary embodiment.
  • the clamping element 13 or the tensioning device 14 or the at least one holding element 27 preferably engages from the inside on the grinding bowl 4 or the bottom element or end of the grinding bowl 4 formed by the auxiliary disk 5 or the like, in particular on the lower end or peripheral wall 29 on and / or from the inside into the recess or circumferential groove 28.
  • the grinding bowl 4 is held or braced alternatively or additionally in the region of its lower or bottom end in the holding state from radially outside and / or axially below.
  • the holding or tightening of the grinding bowl 4 always takes place axially below a grinding bowl bottom 4a delimiting the grinding bowl interior.
  • the receptacle or groove 28, the wall 29 and / or the connecting section 21 is / are arranged in the region of the lower or the end of the grinding bowl 4 opposite the grinding bowl opening.
  • the grinding bowl holder 3 or the grinding bowl plate 12 preferably forms a particularly conical receptacle or groove 12a for the grinding bowl 4 or its lower end or wall 29.
  • the tensioning device 14 or the tensioning element 13 preferably has a head 13a which is arranged or formed at the end of the tensioning element 13 on the grinding bowl side.
  • the head 13a is non-positively connected to the tensioning elements 13 via a screw 13c.
  • the clamping element 13 or the head 13a preferably has a contact surface 13b inclined to the radial plane, which serves as an inclined plane or acts on the holding element 27 in order to move the at least one holding element 27 radially when the clamping element 13 is axially lowered, here outside, or preload.
  • the at least one holding element 27 is preferably axially supported on the grinding bowl holder 3 or grinding bowl plate 12 via a sliding surface 12b, so that when the clamping element 13 is axially lowered - that is, the head 13a is moved axially towards the grinding bowl plate 12 - the holding element 27 radially - preferably outwards - is moved.
  • This engagement or bracing movement preferably or optionally does not run purely radially, but, depending on the symmetrical or asymmetrical inclination of the surfaces 12b and 13b, can also be inclined in addition to the radial plane, in particular directed downwards, in order to achieve a desired axial bracing of the grinding bowl 4 or to effect its holding section 21 against the grinding bowl holder 3 or the grinding bowl plate 12.
  • the inclination of the engagement or bracing movement of the holding element 27 to the radial plane is preferably more than 2 ° or 5 ° and / or preferably less than 10 ° or 15 °.
  • the holding element 27 is preferably at least essentially triangular or trapezoidal in cross section, one surface, in particular the outer surface 27a, preferably essentially forming a circumferential surface, in particular with respect to the preferably ring-like turn 29.
  • the holding element 27 is preferably at least essentially triangular or trapezoidal in cross section, one surface, in particular the outer surface 27a, preferably essentially forming a circumferential surface, in particular with respect to the preferably ring-like turn 29.
  • other shapes are also possible.
  • the holding element 27 can either act punctually or linearly radially and / or axially on the grinding bowl 4 or its end piece or act on it.
  • the holding element 27 preferably engages only or only substantially with a lower end or stop 27b on the grinding bowl 4 or its connecting section 21 and / or in the receptacle or groove 28.
  • the retaining element 27 can also engage, abut and / or be pressed onto the grinding bowl 4 or its wall 29 with its peripheral or outer surface 27a.
  • the holding element 27 or its outer surface 27a can, for example, only abut the wall 29 in a punctiform or linear manner.
  • the holding element 27 can also radially into the wall 29 or a recess formed therein, for example in the case of a concave design of the wall 29, and with a corresponding shape, for example a spherical design, of the holding element 27 engage and thereby - if necessary additionally - bring about a form-fitting mounting or fixing of the grinding bowl 4 in the axial direction.
  • the axial contact surface or shoulder formed by the holding section 21 for the holding element 27 or its stop 27b is preferably slightly inclined with respect to the radial plane, in particular towards the free end or opposite to the inclination of the engagement or bracing movement of the holding element 27.
  • the clamping device 14 or the at least one holding element 27 preferably has a resetting device or a resetting element 30 in order to move the holding element 27 or the holding elements 27 back into an initial position when the tensioning element 13 / head 13a is released or axially raised - in this case radially inward to move - so that the grinding head 4 or its holding section 21 is released in order to be able to remove or lift off the grinding bowl 4 from the grinding bowl holder 3 (axially).
  • An elastic element such as a spring or an elastic band or the like, is preferably provided as the resetting device or resetting element 30 in order to preload all holding elements 27 radially inwards and thereby to bring about the desired resetting when the tensioning element 13 or head 13a is raised .
  • the tensioning element 13 extends, for example, through bores in the holding elements 27 and extends over the entire circumference.
  • other constructive solutions are also possible.
  • a seal 31 in particular as a ring or molded seal, preferably all around, is preferably arranged between the head 13a and the grinding bowl plate.
  • the seal 31 can, for example, be arranged or held in an annular groove 12c of the grinding bowl plate 12.
  • other design solutions are also possible.
  • the clamping element 13 with its head 13a is preferably guided or mounted axially displaceably or movably in the shaft 10 or the grinding bowl plate 12 connected thereto via an upper bearing element 32a and / or a lower bearing element 32b.
  • the clamping element 13 is not necessarily rotationally coupled to the shaft 10 in the second exemplary embodiment.
  • the shaft 10 is preferably firmly connected or screwed to the grinding bowl plate 12 by means of screws 12c in order to keep it rotatable in the desired manner.
  • the return spring or the spring set here the set of plate springs 18, is preferably around the tensioning element 13, in particular between a shoulder 13d of the tensioning element 13 as an axial stop on the one hand and a stop of the shaft 10 or the grinding bowl plate 12 arranged or clamped on the other hand as a second axial stop.
  • the plate springs 18 are preferably arranged within the shaft 10 or grinding bowl holder 3.
  • the return spring or the spring assembly is preferably pre-tensioned, in particular also when the tensioning element 13 or the tensioning device 14 is tensioned or lowered.
  • the grinding station 2 or the shaft 10 is preferably rotatably supported about the planetary axis Y1 by means of the bearings 10a.
  • the grinding station 2, grinding bowl holder 3 or shaft 10 is preferably rotationally coupled via an engagement 10b or a belt wheel or the like (not shown), in particular with the central bearing shaft 9, that when the carrier device 7 or sun wheel 8 is rotated (not in FIG. 7) shown) the grinding station 2 or grinding bowl holder 3 and thus the grinding bowl 4 rotate about the planet axis Y1.
  • the fleece device 22 preferably has a motor or drive 33 and / or an actuating element 34, which particularly preferably acts on the fleece element 23 via an inclined plane or another gear for axially moving or lifting the tensioning element 13.
  • the control element 34 can also be placed directly on the instead of the fleece element 23 Act clamping element 13 (axially). Other constructive solutions are also possible.
  • the grinding station 2 or grinding bowl holder 3 or shaft 10 preferably has a possibility of engagement 10c and / or a stop 10d for the lifting device 22 or a holding device 35 of the lifting device 22 in order to axially abut or hold the grinding bowl holder 3 or the shaft 10 when to enable or ensure axial movement, in particular lifting, of the tensioning element 13.
  • no separate base element such as the auxiliary disk 5 is attached or shown on the grinding bowl 4 in the second exemplary embodiment.
  • a suitable end piece or base element or a suitable insert can be arranged or fastened on the grinding bowl 4 for forming and / or adapting the engagement options for the grinding bowl holder 3 or the grinding bowl plate 12 and / or for the clamping device 14.
  • the attachment can be done, for example, by clamping and / or screwing.
  • Such an end piece or base element can also be used to retrofit existing grinding bowls 4 to adapt to the new clamping system.
  • a particularly preferred aspect of the solution in accordance with the regulations is that the grinding bowl 4 can preferably be held or fixed and / or clamped in the axial direction on the grinding bowl holder or on the grinding bowl base 12 in a threadless and / or form-fitting manner.
  • the clamping device 14 is particularly preferably designed as a quick-clamping device and / or only engages in the recesses or depressions of the grinding bowl 4 on the bottom or underside, the bottom or bottom side of the grinding bowl 4 optionally being provided by an end piece or base element, such as the auxiliary disc 5 or the like , can be formed.
  • the pretensioning device 14 in the depicted example can preferably include the tensioning element 13 with its head 13a, one or more or all holding elements 27, the spring return or plate springs 18 and / or the lifting device 22.
  • Individual aspects and features of the various exemplary embodiments can be combined with one another as desired, but can also be implemented independently of one another. 8 to 13 show a proposed ball mill according to a second aspect of the invention.
  • FIGS. 8 to 13 show a ball mill T on a laboratory scale which has a carrier device 2 'which is rotatably mounted about a central axis body 3' and rotates about the central axis 3a 'when the mill T is in operation.
  • the ball mill T in the exemplary embodiment selected has two grinding bowl holders 4 ', each grinding bowl holder 4' being designed to fix a grinding bowl (not shown) for a grinding operation of the ball mill T.
  • the grinding bowls can have a size between 100 ml and 500 ml, for example.
  • Each grinding bowl holder 4 ' is rotatably mounted on the carrier device 2' and is carried by the latter when it rotates about the central axis 3a '.
  • each grinding bowl holder 4 ' has a planet axis 5 and is rotatably mounted to the carrier device 2'.
  • the two grinding bowl holders 4 ' lie opposite one another with respect to the center axis 3a', so that their moment of inertia is compensated for or their mass produces the least possible imbalance when rotating about the center axis 3a '.
  • the features described below using the example of a ball mill T with a plurality of grinding stations can also be implemented in the same way in laboratory ball mills with only one grinding station or with more than two grinding stations.
  • a drive motor 6 ' sets the carrier device 2' in rotation about the center axis 3a 'by means of a V-belt 7' via a pulley 8 ', as a result of which the grinding bowl holders 4' with a cover plate 9 'of the carrier device 2' run in a circular path around the center axis 3a ' .
  • the cover plate 9 ' is not shown in FIGS. 10 and 11.
  • a rotary movement of the grinding bowl holders 4 ' is additionally about the planet axes 21 'eccentrically mounted to the center axis 3a'.
  • the grinding stations thus run around the center or sun axis 3a 'and at the same time additionally rotate about their own planetary axis 21'.
  • the directions of rotation can be opposite.
  • the central axle body 3 ' is rigidly connected to a base plate 11', which in turn is attached to a housing base plate 12 '.
  • the carrier device 2 ' is rotatably mounted on the stationary central axle body 3' with ball bearings 13 ', 14'.
  • the coupled belt drive 10 ' comprises toothed belt wheels 15', 16 'in order to drive the rotation of the grinding bowl holders 4 with two further toothed belts 17', 18 '.
  • each grinding bowl holder 4 ' has a piston-like clamping element 19' for axially bracing a grinding bowl on a grinding bowl holder 20 '.
  • the clamping element 19 ' is axially displaceably received in the planetary axle 5'.
  • the planetary axle bodies 5' rotate about their planetary axes 2T, the planetary axle bodies 5 'being rotatable by means of ball bearings 22', 23 'on a block-like reinforced bearing area 24' of the pulley 8 'on the one hand and on a disk-like bearing block 25 ', which is fixedly connected to the pulley 8', are rotatably mounted.
  • a grinding bowl is braced and relaxed on a grinding bowl holder 4 'as described below.
  • 10 shows the grinding bowl holders 4 'in the clamped state, in which, when the grinding bowl bottom of a grinding bowl is properly placed on the grinding bowl receptacle 20', clamping blocks 26 'with a pressure plate 27' are pushed radially outward into a corresponding folding projection on the grinding bowl bottom, so that the grinding bowl is on the grinding bowl holder 20 'is fixed.
  • the pressure plate 27 ' is fixedly connected to the tensioning element 19' in the axial direction, the tensioning element 19 'being spring-loaded.
  • the clamping stones 26 'thus come out of a groove-shaped receptacle on the grinding bowl base, so that the grinding bowl is released and can be removed from the pressure plate 27'.
  • Fig. 1 1 shows an example of a grinding bowl holder 4 'in a relaxed state when the clamping element 19' and thus the pressure plate 27 'is raised and the clamping blocks 26' are pulled radially inwards.
  • the ball mill T has a lifting device 30 'for applying a fluid force which is required to lift the tensioning element 19' from the tensioned state into the relaxed state.
  • the lifting device 30 'and the principle of the power transmission to the clamping element 19' is shown below using the example of the tensioning and relaxing mechanism of the clamping element 19 'shown in FIGS. 8 to 13 and the clamping of the grinding bowl via the grinding bowl base described and described by means of clamping stones 26' the grinding bowl holder 20 'described. It goes without saying that the clamping and relaxing mechanism shown and described has been selected as an example to explain the transmission of clamping forces or lifting forces to a clamping element of a grinding bowl holder.
  • the lifting device 30 'described below can also be used, if necessary, for lifting clamping elements in grinding bowl holders 4' which are designed differently from the exemplary embodiment shown, in order to transmit axial and / or vertical clamping forces to at least one clamping element of a grinding bowl holder.
  • the lifting device 30 ' has a lifting element 3T which is guided in a lifting housing 32' so as to be displaceable coaxially to the clamping element 19 '.
  • the lifting element 3T lies freely or loosely in a recess in the lifting housing and is freely movable in the axial direction of the clamping element 19 '.
  • the lifting element 3T bears against a lifting wedge as a coupling element 34 'via two rollers 33'.
  • the rollers 33 ' are connected via a retaining bolt 33a'.
  • the lifting element 3T is held in the center between the two rollers 33 'via a hole in the lifting element 3T on the holding bolt 33a'.
  • the lifting wedge kinematically couples the lifting element 31 'to an adjusting element 35' designed as a threaded spindle on both sides.
  • the coupling element 34 ' has a through bore with an internal thread and is guided in the lifting housing 32' so as to be displaceable in the axial direction of the adjusting element 35 'and rests on two pairs of rollers 36' lying next to one another.
  • Each pair of rollers 36 ' is mounted on the lifting housing 32' via a bearing pin 37 '.
  • FIG. 13 shows a sectional view of lateral projections 38 'in the bottom region of the coupling element 34', which engage under and behind the lateral shoulders 39 'on the inner housing sides of the lifting housing 32'.
  • the coupling element 34 ' is displaceable in the axial direction of the adjusting element 35' and non-displaceably guided transversely to the axial direction via the shoulders 39 '.
  • Fig. 1 1 shows the relaxed state of the grinding bowl holder 20 'with the clamping element 19' raised. Due to the thread guidance of the coupling element 34 'on the adjusting element 35', the adjusting element rotates
  • the lifting device 30 'with the lifting housing 32' and the lifting element 31 'guided on the lifting housing 32' and the coupling element 34 'also guided on the lifting housing 32' as well as the adjusting element 35 'designed as a threaded spindle are kinematically of the carrier device 2' or the Rotational movement of the pulley 8 'and all components connected to the pulley 8' decoupled about the central axis 3a '. In other words, this means that the lifting device 30 'is not carried along by the carrier device 2' about the center axis 3a 'when the ball mill T is operating.
  • an adjusting motor 42' is provided, which can be a commercially available gear motor.
  • the adjusting motor 42 ' transmits a torque to the adjusting element 35', which is converted into a movement of the lifting element 31 'via the coupling element 34'.
  • the adjusting motor 42 ' is attached in such a way that it can follow an adjusting movement, in particular a height adjustment, of the adjusting element 35'.
  • the lifting housing 32 ' has lateral abutment sections 43' in the upper region.
  • the planetary axle 5 ' has a diameter widening at the lower end which forms a circumferential holding section 44' which engages under and behind the abutment sections 43 '.
  • the lifting housing 32' is open. The result is an open recess in the lifting element 3T in the circumferential direction of the circular path along which the planetary axle 5 'is moved during the rotation of the carrier device 2' for the lower end of the planetary axle 5 '.
  • Fig. 1 1 shows the grinding bowl holder 20 'in the relaxed state when the clamping element 19' is raised by the lifting element 3T.
  • the holding section 44 lies at the lower end of the planetary axle 5' from the inside against the abutment sections 43 'of the lifting housing 32' to form an abutment when the grinding bowl holder 4 'is transferred from a tensioned state to a relaxed state.
  • the lifting housing 32 ' can be adjusted or lowered in the vertical direction relative to the grinding bowl holder 4' or relative to the planetary axle body 5 '.
  • the lowering of the lifting housing 32 ' is coupled to the achievement of a specific rotational orientation of the carrier device 2', in which the clamping element 19 'is arranged above the lifting element 3T.
  • the planetary axle body 5' can be carried around the center axis 3 'by the carrier device 2' during the rotation of the carrier device 2 ', i.e. during the milling operation of the ball mill T, and freely on the abutment sections 43 'of the lifting housing 32'.
  • the abutment is formed by lowering the lifting housing 32 '.
  • the lifting housing 32 ' is raised and lowered via a lifting bar 46', which is preferably fixedly connected to the housing base plate 12 'and has a shoulder 47' which opens into a slope 48 '.
  • the coupling element 34 ' has a bevel 49' on the underside and is in the tensioned state of the grinding bowl holder 4 ', when the lifting housing 32' is raised, with the underside on the shoulder 47 '. This is shown in Figure 3.
  • the lifting device 30 ' is designed for the synchronous raising or lowering of the clamping elements 19 of the opposing grinding bowl holders 4' and, in particular, has two coupling elements 34 ', two lifting housings 32', two lifting elements 31 'and a threaded spindle as an adjusting element 35 ', which has a left-hand thread section and a right-hand thread section. Due to an opposite inclination of the run-up surfaces 41 'and correspondingly different thread directions, when the threaded spindle provided as the adjusting element 35' rotates, the coupling elements 34 'of the two lifting devices 30' move towards or away from one another, which results in the lifting or lowering of the lifting arms at the same time - mente 31 'leads.
  • the retaining bolt 33a ' is clamped vertically by means of a spring means 50', preferably an annular spring, which is wound around the retaining bolt 33a 'and the two bearing bolts 37', so that it always experiences a spring tension downwards in addition to the weight, in order to always use it the rollers 33 'to be in contact with the coupling element 34'.
  • a spring means 50' preferably an annular spring, which is wound around the retaining bolt 33a 'and the two bearing bolts 37', so that it always experiences a spring tension downwards in addition to the weight, in order to always use it the rollers 33 'to be in contact with the coupling element 34'.
  • FIGS. 14 to 19 show a proposed arrangement of a ball mill according to a third aspect of the invention.
  • FIGS. 14 to 19 show an arrangement formed from a grinding bowl holder 1 "and a bracing device 2" of a ball mill, not shown in detail, in particular a planetary ball mill.
  • the bracing device 2 " is for axially holding or axially bracing a grinding bowl (not shown in FIG. 14) and / or a grinding bowl adapter shown in FIGS. 16 to 19 on or against the grinding bowl holder 1" and for axially relaxing the grinding bowl or . of the grinding bowl adapter 3 ".
  • the ball mill can have a carrier device rotatably mounted about a center axis, the grinding cup holder 1 being rotatably mounted about an offset planet axis to the carrier device and being carried by the latter about the center axis.
  • the grinding bowl adapter 3 is designed for fastening with a grinding device, not shown.
  • the grinding chamber of the grinding bowl is closed in a manner known per se from the prior art via a grinding bowl cover, which can be connected to the grinding bowl in a non-positive and / or positive manner
  • a grinding bowl cover which can be connected to the grinding bowl in a non-positive and / or positive manner
  • the grinding bowl holder 1 has a plate-shaped base body 4" with three tabs 5 "screwed onto the outer circumference of the base body 4".
  • the tabs 5 are screwed to the base body 4" in each case by means of two screws 6 ".
  • the tabs 5 are arranged on the outer periphery of the grinding bowl holder 1" or on the outer periphery of the base body 4 ", the tabs 5" having an arcuate inner contour, so that there is a circular insertion area for the grinding bowl adapter 3 ".
  • the tensioning device 2 has a piston 7" as a tensioning element, which in an axle body 8 "via a slide bearing 9" is height-adjustable in the axial direction.
  • the piston 7 is spring-loaded via a disk spring assembly 10", with the disk spring assembly 10 "only being shown schematically in Fig. 16.
  • the clamping force required for bracing a grinding bowl or a grinding bowl adapter 3" is only applied via the spring washer pack 10 " Spring force presses the piston 7 “to brace the grinding bowl or the grinding bowl adapter 3" in the axial direction upwards against a pressure plate 11 "which has an annular projection 12" on the edge side.
  • a clamping force is applied via the annular projection 12 "when the piston 7" is raised transfer to the grinding bowl adapter 3 ".
  • the tensioning mechanism provides that the tensioning force is transmitted via the piston 7 "to the pressure plate 11", which raises the grinding bowl or the grinding bowl adapter 3 "from the position shown in FIG. 16, so that radially projecting holding means 13" which are arranged, for example, offset by 60 ° to one another on an outer circumferential surface of the grinding bowl adapter 3 ", against which stops 14" integrated in the straps 5 “come to rest.
  • the stops 14" form abutments on the grinding bowl holder 1 "in the axial direction, so that the The grinding bowl adapter 3 "together with a grinding bowl attached to the grinding bowl adapter 3” can be clamped in the axial direction due to the spring force of the plate spring assembly 10 "and can be fixed on the grinding bowl holder 1.
  • the holding means 13 can be formed in one piece on the outer circumference of the grinding bowl adapter 3".
  • the holding means 13 can also be a separate component which is firmly connected to the grinding bowl adapter 3".
  • each tab 5" has a cutout 15 ".
  • the cutouts 15" in the tabs 5 are of identical design, but can in principle also have a different geometry.
  • Each cutout 15" points upward in the axial direction delimited by a vertical wall section 16 "and two inclined wall sections 17", 18 "adjoining the vertical wall section 16". In the circumferential direction, the recess 15 "is delimited by a vertical wall section 19".
  • the recess 15" On the side opposite the vertical wall section 19 ", the recess 15" is open, so that it is possible to screw a holding means 13 "on the grinding bowl adapter into the recess 15" when the grinding bowl adapter 3 "is placed on the base body 4" of the grinding bowl holder 1 ".
  • the grinding bowl adapter 3" is thereby placed on the base body 4 "from above placed or inserted into the grinding bowl holder 1 "and then rotated until the holding means 13" comes into contact with the vertical wall section 19 "of the bracket 5".
  • the vertical wall section 19 “thus forms a further stop 20" and an abutment acting in the circumferential direction for the holding means 13 ".
  • the geometry of the holding means 13 "in cross section is adapted to the wall geometry of the tab 5" in the region of the recess 15 ".
  • the holding means 13" in cross section can have two centering bevels 21 “, 22 “on the top.
  • a sliding plate 24 can be provided for a simplified rotatability of the grinding bowl adapter 3" to reach the final rotational position.
  • at least one ball thrust piece 25 can also be provided, which is inserted into a bore 26" of the base body 24 "and on which the bottom of the grinding bowl adapter 3" rolls when it is rotated relative to the grinding bowl holder 1 ".
  • axle body 8 is connected in a rotationally fixed manner to the base body 4 "by means of screws 28".
  • axle body 8 is rotatably mounted on a support device, not shown, and by this when the support device is rotated by one Center axis can be carried.
  • the axle body 8 ′′ then forms a planetary axis which is rotatably mounted to the carrier device.
  • the carrier device in turn is rotatably mounted about a central axis body and rotates about the central axis during operation of the ball mill.
  • a drive motor can set the carrier device in rotation about the center axis by means of a V-belt via a belt pulley, whereby the grinding bowl holder 1 "rotates with the carrier device on a circular path around the center axis.
  • a toothed belt drive coupled to the belt drive of the belt pulley can additionally rotate the Grinding bowl holder 1 "can be brought about a planet axis mounted eccentrically to the center axis.
  • the axle body 8 has on its outside a tooth profile 29 ′′ for a toothed belt (not shown) of a belt drive. The grinding station thus rotates around the center or sun axis and at the same time rotates additionally about its own planet axis. The directions of rotation can be opposite.
  • the ball mill can have, for example, two grinding bowl holders 1 ", each grinding bowl holder 1" being designed to fix a grinding bowl for a grinding operation of the ball mill.
  • the grinding bowls can have a size between 100 ml and 500 ml, for example.
  • the grinding bowl adapter 3 is then pressed with the folding means 13" provided on the circumference against the axial stops 14 "in the tabs 5" and due to the inclined wall sections 17 “, 18" in the tabs 5 "and the centering bevels 21", 22 “ centered the tabs 13 "at the same time.
  • a positive connection acting in the axial and circumferential direction between the grinding bowl adapter 3" and the grinding bowl holder 1 " is achieved via the stops 14" and the holding means 13 ".
  • the clamping concept described provides that the grinding bowl adapter 3 "is only subjected to a clamping force on the bottom and shell side.
  • a grinding bowl connected to the grinding bowl adapter 3" is therefore not clamped between the disgust and the floor from above, but the grinding bowl is pushed through from below Piston 7 "pressed into the stops 14".
  • the stops 14 ′′ form abutments acting in the axial direction and in the circumferential direction in order to securely clamp the grinding bowl adapter 3 ′′ on or against the grinding bowl holder 1 ′′.
  • the holding means 13 are provided in the region of the grinding bowl adapter 3" near the bottom.
  • the abutment sections formed by the stops 14 "in the tabs 5" are accordingly provided in the area below half the height, preferably in the area of the lower third of the height of the grinding bowl adapter 3 ".
  • the grinding bowl adapter 3 " is provided in the area above the tabs 5".
  • the grinding bowl adapter 3 " is provided. and thus also a grinding bowl connected to the grinding bowl adapter 3 "freely accessible on the shell side.
  • the grinding bowl lid is freely accessible from above when the grinding bowl is clamped while maintaining the clamping state, which increases ease of use and allows access to the grinding chamber of the grinding bowl by loosening the grinding bowl lid even when the grinding bowl is clamped.
  • a slide 30 can be provided on at least one of the tabs 5", which is arranged so as to be longitudinally displaceable on a corresponding longitudinal recess in the lens 5 ", the slide 30" being pushed into a blocking position via a spring means 31 "when the grinding bowl adapter 3 "is not or not properly inserted into the grinding bowl holder 1".
  • a lower blocking edge 32 "strikes a stationary mill part, in particular on a carrier device of the mill. This means that the axle body 8 "and thus the grinding bowl holder 1" and, preferably, also a carrier device for the grinding bowl holder 1 "are not freely rotatable.
  • a vertical guide 34" is provided in the upper region of the tab 5 ", in which an axial shaft piece 35 on the actuating arm 33" of the slide 30 "is guided to be longitudinally displaceable.
  • a locking element 36" designed as a ball is provided, which is spring-loaded and snaps into a complementary recess in the lateral surface of the folding means 13 "when the grinding bowl adapter 3" has reached a certain rotational position, preferably the final rotating position before the grinding bowl adapter 3 "is tightened. This ensures that the grinding bowl adapter 3 "is not unintentionally turned back from a certain rotational position or is rotated further.
  • this can have a longitudinal groove 38 ′′.
  • the slide 30 In order to be able to raise the slide 30 "relative to a guide sleeve 38", in which the latching means 36 "is guided in a transversely displaceable manner, the slide 30" has an elongated hole 39 ".
  • the slide 30" has another Elongated hole 40 ′′ for a folding projection 41 ′′ on the tab 5 ′′, the slide 30 ′′ resting against the folding projection 41 ′′ in the blocking position and being secured against further axial displacement downwards.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

L'invention concerne un broyeur planétaire à billes pour laboratoire, ainsi qu'un bol de broyage destiné à un tel broyeur. Ledit bol de broyage est maintenu uniquement par le bas par l'intermédiaire d'un élément de serrage mobile axialement et peut être de préférence soulevé axialement de l'élément de serrage pour être retiré.
PCT/EP2020/050986 2019-01-16 2020-01-16 Broyeur à billes et bol de broyage pour broyeur à billes Ceased WO2020148366A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2021541279A JP7441845B2 (ja) 2019-01-16 2020-01-16 ボールミルおよびボールミル用の粉砕ジャー
CN202080021603.3A CN113573814B (zh) 2019-01-16 2020-01-16 球磨机和用于球磨机的研磨罐
EP20702575.0A EP3911444A1 (fr) 2019-01-16 2020-01-16 Broyeur à billes et bol de broyage pour broyeur à billes

Applications Claiming Priority (14)

Application Number Priority Date Filing Date Title
DE202019100236 2019-01-16
DE202019100236.0 2019-01-16
DE202019100260.3 2019-01-17
DE202019100260 2019-01-17
DE202019102694.4 2019-05-14
DE202019102694 2019-05-14
DE202019105373.9 2019-09-27
DE202019105373.9U DE202019105373U1 (de) 2019-01-16 2019-09-27 Kugelmühle
DE202019106400.5U DE202019106400U1 (de) 2019-01-16 2019-11-15 Kugelmühle
DE202019106400.5 2019-11-15
DE202019106603.2U DE202019106603U1 (de) 2019-01-16 2019-11-27 Kugelmühle
DE202019106603.2 2019-11-27
DE102019135467.6A DE102019135467A1 (de) 2019-01-16 2019-12-20 Kugelmühle und Mahlbecher für eine Kugelmühle
DE102019135467.6 2019-12-20

Publications (1)

Publication Number Publication Date
WO2020148366A1 true WO2020148366A1 (fr) 2020-07-23

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Application Number Title Priority Date Filing Date
PCT/EP2020/050986 Ceased WO2020148366A1 (fr) 2019-01-16 2020-01-16 Broyeur à billes et bol de broyage pour broyeur à billes

Country Status (5)

Country Link
EP (1) EP3911444A1 (fr)
JP (1) JP7441845B2 (fr)
CN (1) CN113573814B (fr)
DE (4) DE102019126162B4 (fr)
WO (1) WO2020148366A1 (fr)

Cited By (2)

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DE102022118216B3 (de) 2022-07-21 2023-10-12 Retsch Gmbh Labormühle, Mahlbecher für eine Labormühle und Anordnung mit einer Labormühle und mit einem Mahlbecher
CN117960317A (zh) * 2024-04-01 2024-05-03 西华大学 一种翻转振动式研磨装置及方法

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CN112756070B (zh) * 2021-01-11 2024-09-17 合肥九晟机电科技有限公司 一种新型快速装夹装置
CN112894684A (zh) * 2021-05-08 2021-06-04 成都飞机工业（集团）有限责任公司 一种径向直动式夹紧装置
US20260048945A1 (en) * 2022-08-16 2026-02-19 Krämer Ag Semiautomatic spiral-tightening device for a vibrating conveyor
EP4536408A1 (fr) * 2023-05-19 2025-04-16 Retsch GmbH Broyeur de laboratoire et procédé de serrage d'une cuve de broyage sur et/ou dans un support de cuve de broyage d'un broyeur de laboratoire
CN119951629B (zh) * 2025-04-03 2025-11-18 山东科赛基农生物工程有限公司 一种悬浮剂生产用的高效型砂磨机

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CN104470637B (zh) * 2012-06-15 2016-12-21 雷特希有限责任公司 具有空间不平衡补偿的球磨机
MY181810A (en) * 2013-05-20 2021-01-07 Jtg And Partners Pty Ltd A grinding apparatus
CN104525319B (zh) * 2015-01-01 2017-06-13 长沙天创粉末技术有限公司 一种全方位行星式球磨机
CN205308454U (zh) * 2016-01-15 2016-06-15 江西省君鑫贵金属科技材料有限公司 改良的行星式球磨机
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JPH0417838U (fr) * 1990-06-01 1992-02-14
WO2007042203A1 (fr) * 2005-10-07 2007-04-19 Fritsch Gmbh Broyeur a boulets pourvu de moyens d'encliquetage
CN100376327C (zh) * 2005-12-30 2008-03-26 中山大学 行星式球磨机
DE102012009987A1 (de) 2012-05-22 2013-11-28 Fritsch Gmbh Laborkugelmühle
CN203886612U (zh) * 2014-06-16 2014-10-22 长沙天创粉末技术有限公司 一种行星球磨机

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Publication number Priority date Publication date Assignee Title
DE102022118216B3 (de) 2022-07-21 2023-10-12 Retsch Gmbh Labormühle, Mahlbecher für eine Labormühle und Anordnung mit einer Labormühle und mit einem Mahlbecher
CN117960317A (zh) * 2024-04-01 2024-05-03 西华大学 一种翻转振动式研磨装置及方法

Also Published As

Publication number Publication date
CN113573814A (zh) 2021-10-29
DE102019135467A1 (de) 2020-07-16
JP2022517808A (ja) 2022-03-10
DE202019106603U1 (de) 2020-04-17
DE102019130964A1 (de) 2020-07-16
DE102019126162A1 (de) 2020-07-16
CN113573814B (zh) 2023-06-23
EP3911444A1 (fr) 2021-11-24
JP7441845B2 (ja) 2024-03-01
DE102019126162B4 (de) 2025-03-13

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