EP2199028B1 - Outil manuel électrique, en particulier marteau perforateur et/ou burineur - Google Patents

Outil manuel électrique, en particulier marteau perforateur et/ou burineur Download PDF

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Publication number
EP2199028B1
EP2199028B1 EP09173522.5A EP09173522A EP2199028B1 EP 2199028 B1 EP2199028 B1 EP 2199028B1 EP 09173522 A EP09173522 A EP 09173522A EP 2199028 B1 EP2199028 B1 EP 2199028B1
Authority
EP
European Patent Office
Prior art keywords
bearing element
housing
hammer tube
electric power
portable electric
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.)
Not-in-force
Application number
EP09173522.5A
Other languages
German (de)
English (en)
Other versions
EP2199028A2 (fr
EP2199028A3 (fr
Inventor
Kurt Sieber
Tobias Herr
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2199028A2 publication Critical patent/EP2199028A2/fr
Publication of EP2199028A3 publication Critical patent/EP2199028A3/fr
Application granted granted Critical
Publication of EP2199028B1 publication Critical patent/EP2199028B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0019—Guide-sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/065—Details regarding assembling of the tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/331—Use of bearings
    • B25D2250/335—Supports therefor

Definitions

  • the invention relates to an electric hand tool according to the preamble of claim 1, in particular drilling and percussion hammer, with a housing and with a hammer tube, which is rotatably mounted in the housing by means of at least one bearing element.
  • the invention further relates to a method for introducing such a hammer tube in the housing of such a power hand tool.
  • Electric hand tools of the generic type are known in particular as drills and impact hammers. They have as a driven member to a hammer tube, are introduced in the pulse generating construction elements with effect on a tool holder, and wherein the hammer tube of the rotational drive of the tool holder is used and is driven for this purpose via a transmission of the electric motor.
  • Such hammer tubes are therefore rotatably mounted in a housing of the electric hand tool.
  • the radial bearing takes place here regularly via plain bearings, such a plain bearing is pressed for example in an intermediate flange, which surrounds the hammer tube at least partially and serves to accommodate the hammer tube in the bearing in the housing, and by means of a needle bearing, which is arranged in the housing.
  • the axial bearing via stops in the housing of the electric hand tool, for example in the gear housing and in the intermediate flange.
  • This storage which is customary in the prior art, is associated with a high level of component expenditure, with a tolerance chain that tends to vibrate being present due to the multiplicity of components, in particular due to axial play.
  • the assembly is complicated, since in the motor housing and / or gear housing of the intermediate flange is introduced, in the direction of the engine then working the hammer tube inserted and joined with the bearings.
  • the document GB 877,794A describes an electric hand tool with a housing and a hammer tube, which is rotatably mounted in the housing by means of a bearing element.
  • the bearing element is designed to screw into a bearing receptacle of the housing for producing a positive connection.
  • the patent GB 1,028,531 A describes a similar electric hand tool.
  • the document US 6,902,013 B2 describes an electric hand tool, which has three connectable by a bayonet lock housing parts.
  • the object of the invention is to provide a cost-effective, space-saving and low-backlash storage of the hammer tube for generic electric hand tools and to allow a simplified installation.
  • an electric hand tool for this purpose, is proposed, in particular a drilling and percussion hammer, with a housing and with a hammer tube, which is rotatably mounted in the housing by means of at least one bearing element.
  • the bearing element is held fixed by means of a rotation caused by positive engagement of the housing.
  • the fixation of the bearing element is therefore not as usual in the prior art, but by means of a positive connection, which is effected by rotation.
  • the bearing element is thus introduced into the housing in such a manner that it is loose or removable before the positive engagement occurring by rotation of the bearing element, but its installation position is fixed by means of the positive connection. It is therefore not screwed and not injected / molded, but held on the form-fitting.
  • the positive connection is formed by a bayonet connection between the bearing element and a bearing receptacle.
  • Bayonet closures as such are known, they have shape-responsive positive locking elements, which are brought by rotation of the components to be joined together in engagement and positive engagement.
  • bayonet locks are used when the components to be connected are also to be released frequently by a user, in particular in daily use of a corresponding device or a corresponding device, for example, lenses of a single-lens reflex camera, ie whenever a quick release and application on the one hand and a secure fixation on the other hand is required.
  • the bearing element is a bearing ring, which is penetrated by the hammer tube.
  • the bearing element is in this case annular, namely as a bearing ring.
  • the bearing ring is penetrated by the hammer tube, so that the bearing ring rests on the hammer tube or an outer circumferential surface of the hammer tube.
  • the bearing element is a sliding bearing element.
  • Plain bearings are inexpensive and durable in production and construction.
  • the bearing element preferably has on its outer side at least one fixing means for fixing to the housing.
  • the fixing means serves to secure the positive connection caused by rotation and thus the fixation in the mounting position intended for the bearing element.
  • the fixing agent is intended to prevent undesired loosening of the positive locking caused by rotation, for example due to vibrations during operation of the electric hand tool.
  • the fixing means is designed as a protruding fixing lug.
  • the fixing means is formed projecting over the outer contour of the bearing element, in particular in the form of a fixing lug.
  • a fixing lug can engage in recesses formed on the housing in the region of the bearing element or, for example be determined by means of another element, such as a screw.
  • the fixing means is formed integrally with the bearing element, that is not attached to this, but formed from the same material.
  • a cost-effective and rapid production in one go such as in a punching / forming process, allows.
  • the invention provides an anti-rotation between the bearing element and the housing. By preventing rotation, a relative rotation between the bearing element and the housing, thus an undesirable release of the positive connection, prevented. This ensures that the bearing element remains fixed in the housing in the intended manner. As a rotation, for example, a screw, a positive connection or any other connection comes into question, which reliably prevents twisting.
  • the housing has a transmission housing and / or an intermediate housing, wherein the bearing element is located in the transmission housing and / or in the intermediate housing.
  • the housing is subdivided with regard to the spatial allocation of different housing areas in a transmission housing, in which a transmission of the electric hand tool, for example, at least parts of a striking mechanism are arranged, an intermediate housing in which the connection to the tool holder is arranged and a motor housing in which essentially the motor of the electric hand tool is arranged, can be distinguished.
  • a transmission housing in which a transmission of the electric hand tool, for example, at least parts of a striking mechanism are arranged
  • an intermediate housing in which the connection to the tool holder is arranged
  • a motor housing in which essentially the motor of the electric hand tool is arranged
  • the housing may also consist of only one part or of two parts and, for example, not only have a transverse, but also a longitudinal division. It is essential that the bearing element is arranged in the region of the housing, in which at least substantially the transmission is located and / or in the region which serves as an intermediate housing of the connection of the transmission region to the tool holder. This arrangement makes a simple, low-cost design causes because the bearing element can be easily introduced into such areas of the housing.
  • Next is a recording of the over causes the hammer tube transmitted forces through the gear housing, which is designed to be very resilient and stable due to its design as a gear housing.
  • the gear housing is only a partial housing or, in particularly preferred embodiments, a skeleton structure, wherein the sub-housing or this skeleton structure are designed so that the force introduction and force absorption takes place in a particularly effective manner and in such a way that the structure as such absorbs the forces.
  • the housing of the electric hand tool Particularly easy and inexpensive form by the gear housing or the skeleton structure in mechanically very stable, for example, made of a metal alloy structure and the housing outer contour is represented by a low-priced and lightweight plastic cover, for example as housing half-shells or partial shells.
  • a gearbox housing training with a separate, lightweight housing cover is possible.
  • the hammer tube superimposed in only one bearing element, unlike in the prior art, in which it is stored in at least two bearing elements.
  • the hammer tube can be shortened in this embodiment and the bearing element can also be formed extended, so that there is a greater overlap of bearing element and hammer tube, as viewed on the relative length of the hammer tube.
  • the hammer tube can be very easily introduced in this way with the only one bearing element in the housing, in particular in the transmission housing.
  • a particularly simplified structure of the electric hand tool can be achieved, with the formation of substantially two blocks, one of which includes the engine and the motor housing, the other the transmission in the transmission housing with the bearing element and the hammer tube.
  • the structure of the electric hand tool, in particular the assembly is thereby greatly simplified.
  • the outer diameter of the bearing element is greater than each outer diameter of such parts associated with and / or disposed on the hammer tube, and which are arranged between the bearing element and a tool holder to be assigned or assigned hammer tube end face. This ensures that the assembly, namely an insertion in the axial direction, as described above, can be done easily and easily. At the same time a clear axial positioning of the hammer tube is achieved in the housing, as a further displacement in the axial direction in the direction of a tool holder (which is not yet arranged on the hammer tube, but there will be arranged) can be done.
  • a method for introducing a hammer tube in the housing of an electric hand tool, in particular a drill and / or percussion hammer, preferably as described above, wherein the housing has a motor area and the electric hand tool is provided with a tool holder. It is provided that the hammer tube is inserted starting from the engine area in the direction of the tool holder in the housing and then fixed by turning the bearing element. Unlike the prior art, therefore, the hammer tube is not mounted in the direction of the engine or a motor assembly, but in the opposite direction in the direction of the tool holder.
  • the hammer tube is actually inserted starting from the motor area, such that the motor is already mounted and inserted in the housing, but it can housing parts, in particular motor housing and gear housing, be present separately. It is essential that the hammer tube is inserted from the area provided for connection to the motor and inserted in the direction of the tool holder. In such an inserted position, the bearing element for the hammer tube is fixed by twisting, resulting in the above-described positive connection, using the bayonet closure described above.
  • FIG. 1 shows a hammer tube 1 with applied on its outer circumferential surface 2 bearing element 3, wherein the bearing element 3 is formed as a bearing ring 4, which is penetrated by the hammer tube 1.
  • the hammer tube 1 is inserted for its inclusion and shipment in an installed state in the axial direction 5 in a transmission housing 6, wherein the transmission housing 6 has a bearing element receptacle 7 for receiving the bearing element 3.
  • the hammer tube 1 passes through the bearing element receptacle 7 in the direction of an axial direction 5 to the bearing element receiving 7 machine neck 8, to which, viewed in the axial direction 5, a tool holder 9 connects.
  • the tool holder 9 is coupled to the hammer tube 1 and thus operatively connected in terms of rotational movement and pulse / impact action (for transmission to an insert tool, not shown).
  • the gear housing 6 is preferably made of a solid material 10, for example, a solid aluminum alloy 11. It has, formed from the material 10, the bearing element receiving 7, the radial and axial forces, as they are applied by the bearing element 3 on the bearing element receptacle 7, receives and dissipates in the transmission housing 6.
  • the gear housing 6 may have the lower side, removable housing cover 12 shown here, which in the embodiment shown here, a gearbox switch 13 for a not-shown gearbox, which is incorporated in the gear housing 6 of the electric hand tool, not shown.
  • the hammer tube 1 After introduction of the hammer tube 1 (namely insertion in the axial direction 5 until it engages in the bearing element receptacle 7), the hammer tube 1 supports exclusively via the bearing element 3 and the associated bearing element receptacle 7 in the gearbox housing 6.
  • the radial support of the hammer tube 1 takes place via the bearing element 3, which is designed as a sliding bearing 14.
  • FIG. 2 shows the hammer tube 1 immediately before reaching its installation position in the gear housing 6, wherein the tool holder 9 associated coupling piece 17 passes through the machine neck 8, and wherein the hammer tube 1 rotatably axially concentric to a rotational axis 18 of the tool holder 9 in the gear housing 6 rotatably supports.
  • the introduction of the hammer tube 1 in the bearing element receiving 7 takes place in the axial direction 5, wherein upon engagement of the bearing element 3 for locking the bayonet lock 15, a rotation 19 takes place in the circumferential direction; a rotation 19 in the opposite direction causes a loosening of the bayonet closure 15, whereby the hammer tube 1 can be easily removed again from the gear housing 6, for example, in the case of service.
  • the transmission and the impact mechanism is introduced and joined and then the unit shown of the gear housing 6 with the motor housing (not shown) and the motor introduced there to drive connected.
  • FIG. 3 shows the bearing element 3, which is designed as a self-lubricating sliding bearing 14. It consists of a suitable material for such self-lubricating bearing applications, for example, sintered bronze 20.
  • the bearing element 3 On its outer peripheral side 21, the bearing element 3 for forming the bayonet lock 15 locking webs 22 which in shape-responsive geometries of in FIGS. 1 and 2 shown bearing element receptacle 7 (see there) intervene. Due to the elongated in the circumferential direction execution of the locking webs 22 can be a relatively large-scale axial fixation of the bearing element 3 in the bearing element holder 7, not shown here cause.
  • the locking webs 22 are in this case as fixing means 23 for fixing the bearing element 3 in the in FIGS.
  • the bearing element 3 has a rotation 25, which consists of an interaction of recesses 26 in a face 27 and the outer peripheral side 21 of the bearing element 3 with engagement means, not shown.
  • the engagement means engage, in the installed state of the bearing element 3 in the bearing element receptacle 7 shown in the preceding figures, into the recesses 26 and thereby prevent a relative rotation of the bearing element 3 to the bearing element receptacle 7 shown in the preceding figures, ie an opening of the bayonet 15
  • the engagement means may in this case be formed by a screw connection, a detent or other suitable means which reliably (and in particular self-acting) engage in the recesses 26.
  • the engagement means is preferably formed by a web arranged on the housing cover 12, in particular a plastic web, which stops, for example, during the production process of the housing cover 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (11)

  1. Outil électrique à main, en particulier marteau perforateur et percuteur, avec un carter et avec un tube de marteau (1) qui est supporté en rotation dans le carter au moyen d'au moins un élément de palier (3), l'élément de palier (3) étant retenu de façon fixée sur le carter au moyen d'une liaison de forme suscitée par une rotation (19), caractérisé en ce que la liaison de forme est formée par une fermeture à baïonnette (15) entre l'élément de palier (3) et un logement d'élément de palier (7) du carter, l'élément de palier (3) présentant un dispositif anti-rotation (25), le dispositif anti-rotation (25) se composant, de façon interactive, de creux (26) dans un côté frontal (27) ainsi que dans le côté circonférentiel extérieur (21) de l'élément de palier (3) avec des moyens d'enclenchement, les moyens d'enclenchement s'enclenchant dans les creux (26) dans l'état monté de l'élément de palier (3) et empêchant ainsi une rotation relative de l'élément de palier (3) par rapport au logement d'élément de palier (7) et donc une ouverture de la fermeture à baïonnette (15).
  2. Outil électrique à main selon la revendication 1, caractérisé en ce que l'élément de support (3) est une bague de palier (4) qui est traversée par le tube de marteau (1).
  3. Outil électrique à main selon l'une des revendications précédentes, caractérisé en ce que l'élément de palier (3) est un élément de palier glissant.
  4. Outil électrique à main selon l'une des revendications précédentes, caractérisé en ce que l'élément de palier (3) présente sur son côté extérieur au moins un moyen de fixation (23) destiné à la fixation sur le carter.
  5. Outil électrique à main selon la revendication 4, caractérisé en ce que le moyen de fixation (23) est constitué en tant qu'ergot de fixation (24) en saillie.
  6. Outil électrique à main selon l'une des revendications 4 ou 5, caractérisé en ce que le moyen de fixation (23) est constitué d'un seul tenant avec l'élément de palier (3).
  7. Outil électrique à main selon l'une des revendications précédentes, caractérisé en ce que le carter présente un carter d'engrenage (6) et/ou un carter intermédiaire, et en ce que l'élément de palier (3) se trouve dans le carter d'engrenage (6) et/ou dans le carter intermédiaire.
  8. Outil électrique à main selon l'une des revendications précédentes, caractérisé en ce que le tube de marteau (1) est supporté uniquement dans un élément de palier (3).
  9. Outil électrique à main selon la revendication 8, caractérisé en ce que l'élément de palier (3) uniquement au nombre de un est disposé dans le carter d'engrenage (6).
  10. Outil électrique à main selon l'une des revendications précédentes, caractérisé en ce que l'élément de palier (3) présente un diamètre extérieur qui est plus grand que chaque diamètre extérieur de composants affectés au tube de marteau (1) et mis en place sur le tube de marteau (1) entre l'élément de palier (3) et un côté frontal de tube de marteau affecté ou à affecter à un logement d'outil (9).
  11. Procédé de mise en place du tube de marteau (1) dans le carter d'un outil électrique à main selon l'une ou plusieurs des revendications précédentes, le carter présentant une zone moteur, et l'outil électrique à main étant muni d'un logement d'outil, caractérisé en ce que le tube de marteau (1) est inséré dans le carter en partant de la zone de moteur en direction du logement d'outil, le logement d'élément de palier (7) étant, lors de l'insertion du tube de marteau, traversé pour la réception de l'élément de palier (3), et le tube de marteau (1) étant fixé axialement par le biais d'une fixation de l'élément de palier (3) disposé sur le tube de marteau (1) dans le logement d'élément de palier (7) au moyen d'une rotation par la formation d'une fermeture à baïonnette, des moyens d'enclenchement disposés, dans l'état monté de l'élément de palier, sur un couvercle de carter du carter s'enclenchant dans les creux dans un côté frontal ainsi que dans un côté de circonférence extérieur de l'élément de palier (3), pour empêcher une rotation relative de l'élément de palier (3) par rapport au logement d'élément de palier (7), et donc une ouverture de la fermeture à baïonnette, les moyens d'enclenchement étant formés par une nervure disposée côté intérieur sur le couvercle de carter (12).
EP09173522.5A 2008-12-19 2009-10-20 Outil manuel électrique, en particulier marteau perforateur et/ou burineur Not-in-force EP2199028B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008054978A DE102008054978A1 (de) 2008-12-19 2008-12-19 Elektrohandwerkzeug, insbesondere Bohr- und/oder Schlaghammer

Publications (3)

Publication Number Publication Date
EP2199028A2 EP2199028A2 (fr) 2010-06-23
EP2199028A3 EP2199028A3 (fr) 2014-01-22
EP2199028B1 true EP2199028B1 (fr) 2017-12-13

Family

ID=42020454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09173522.5A Not-in-force EP2199028B1 (fr) 2008-12-19 2009-10-20 Outil manuel électrique, en particulier marteau perforateur et/ou burineur

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Country Link
EP (1) EP2199028B1 (fr)
DE (1) DE102008054978A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9573262B2 (en) * 2012-11-19 2017-02-21 Makita Corporation Impact tool
WO2019079560A1 (fr) 2017-10-20 2019-04-25 Milwaukee Electric Tool Corporation Outil à percussion
US11059155B2 (en) 2018-01-26 2021-07-13 Milwaukee Electric Tool Corporation Percussion tool

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
DE557948C (de) * 1930-05-09 1932-08-30 Nordiska Armaturfab Ab Vorrichtung an elektrischen Schlagwerkzeugen
GB626869A (en) * 1946-08-26 1949-07-22 Romeo Agustoni Portable machine tool
GB877794A (en) * 1959-01-14 1961-09-20 Joseph Morris Mechanical hammer
US3119274A (en) * 1961-06-05 1964-01-28 Black & Decker Mfg Co Power-driven tool for drilling or impact-drilling
GB1028531A (en) * 1963-02-22 1966-05-04 Black & Decker Mfg Co Rotary hammer
DE10045618A1 (de) * 2000-09-15 2002-04-04 Bosch Gmbh Robert Werkzeugmaschine mit einem Raum mit Schmiermittel und einer Druckausgleichseinrichtung des Raums
DE10260710A1 (de) * 2002-12-23 2004-07-01 Robert Bosch Gmbh Bohr- oder Schlaghammer
DE10261025A1 (de) * 2002-12-24 2004-07-08 Robert Bosch Gmbh Elektrowerkzeugmaschine mit mehreren, in getrennten Gehäusen untergebrachten Funktionsbaugruppen
DE102006026157A1 (de) * 2006-06-06 2007-12-13 Robert Bosch Gmbh Elektrohandwerkzeugmaschine mit einem Hammerrohr
DE102006060319A1 (de) * 2006-12-20 2008-06-26 Robert Bosch Gmbh Werkzeugmaschine mit einem mit einer Verdrehsicherung versehenden Gleitlager

Non-Patent Citations (1)

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Title
None *

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Publication number Publication date
EP2199028A2 (fr) 2010-06-23
EP2199028A3 (fr) 2014-01-22
DE102008054978A1 (de) 2010-06-24

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