EP2501523B2 - Presse à guidage manuel - Google Patents

Presse à guidage manuel Download PDF

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Publication number
EP2501523B2
EP2501523B2 EP10781667.0A EP10781667A EP2501523B2 EP 2501523 B2 EP2501523 B2 EP 2501523B2 EP 10781667 A EP10781667 A EP 10781667A EP 2501523 B2 EP2501523 B2 EP 2501523B2
Authority
EP
European Patent Office
Prior art keywords
pressing
electric motor
motor
manually guided
control device
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.)
Active
Application number
EP10781667.0A
Other languages
German (de)
English (en)
Other versions
EP2501523B1 (fr
EP2501523A1 (fr
Inventor
Martin Bungter
Volker Reichel
Jörg Hanisch
Günther Odenthal
Sven Meyer
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.)
Novopress GmbH Pressen und Presswerkzeuge and Co KG
Original Assignee
Novopress GmbH Pressen und Presswerkzeuge and Co KG
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
Family has litigation
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Application filed by Novopress GmbH Pressen und Presswerkzeuge and Co KG filed Critical Novopress GmbH Pressen und Presswerkzeuge and Co KG
Publication of EP2501523A1 publication Critical patent/EP2501523A1/fr
Application granted granted Critical
Publication of EP2501523B1 publication Critical patent/EP2501523B1/fr
Publication of EP2501523B2 publication Critical patent/EP2501523B2/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5367—Coupling to conduit

Definitions

  • the invention relates to a hand-held pressing device for connecting two workpieces.
  • the pressing device according to the invention is suitable for connecting a pipe to a press fitting by pressing.
  • the invention relates to hand-held pressing tools for pressing cable lugs.
  • Such hand-held pressing devices have a pressing tool with several pressing jaws.
  • the pressing jaws enclose the press fitting placed over the pipe. Closing the press jaws deforms or presses the press fitting and the pipe.
  • pressing tools for cable lugs these are pressed by closing pressing jaws, with the cable lug being arranged between at least two pressing jaws.
  • One of the pressing jaws can be fixed here.
  • the pressing tool is connected to a usually electro-hydraulic or electro-mechanical conversion device.
  • the conversion device is usually driven by an electric motor with the interposition of a gearbox.
  • a hydraulic conversion device includes a hydraulic pump, which is usually a piston pump or a gear pump.
  • the pump is driven by a brush motor.
  • the pumps used which have to generate a high torque, require a relatively low drive speed of usually 2,000 to 5,000 revolutions per minute due to their design.
  • a reduction gear is arranged between the motor and the pump.
  • a working piston is displaced by the hydraulic medium delivered by the pump.
  • the working piston is connected to the pressing jaws so that high pressing forces can be transferred to the pressing jaws via the working piston.
  • the pressure chamber provided for actuating the working piston is opened by a valve usually designed as a needle valve, so that there is an abrupt pressure reduction in the pressure chamber.
  • the pressure reduction leads to an increase in the speed of the pump, which is detected by a speed sensor and leads to the electric motor being switched off automatically.
  • the working piston is then pushed back via a return spring and the pressing jaws are thus opened.
  • a drive unit for a hand-held pressing device consisting of an electric motor and a hydraulic conversion device.
  • the pump driven by the engine, delivers a hydraulic medium that moves a working piston.
  • the working piston can be connected to a pressing tool.
  • Such hand-held pressing devices must be serviced at regular intervals.
  • the component that determines the maintenance interval is the brushed motor.
  • the brushes of the brushed motor are subject to very high wear due to the frequent starting under load and due to the provision of stop functions in which a short circuit is generated via the brush.
  • the object of the invention is to create a hand-held pressing device in which longer maintenance intervals are implemented.
  • the hand-held pressing device for connecting a pipe to a press fitting by pressing has a pressing tool with a plurality of pressing jaws.
  • the pressing tool is driven by an electric motor with the interposition of a conversion device.
  • the conversion device is in particular an electrohydraulic or electromechanical conversion device.
  • the electric motor is a brushless electric motor.
  • a brushless electric motor has the considerable advantage over the brushed motor used in known pressing tools that no brushes that are susceptible to wear are provided.
  • the brushes which are subject to high wear due to the heavy loads, can be omitted. This makes it possible to significantly extend the maintenance cycles.
  • the number of pressing operations that can be carried out between two maintenance operations can in particular be at least doubled or even tripled.
  • An advantage according to the invention of using a brushless electric motor to operate the pressing device is that additional functions can be implemented in a simple manner by a brushless electric motor or the control device of the brushless electric motor.
  • the speed required to generate a desired torque or a desired pressing force is controlled via a control device connected to the electric motor or integrated into it.
  • the current engine speed is determined by means of the control device and the electric motor is switched off when the speed increases.
  • a brushless electric motor according to the invention has the advantage that the maintenance costs are reduced since it is not necessary to replace the brushes or the entire brush motor.
  • the electric motor is an external or internal rotor motor.
  • the electric motor is preferably a brushless external rotor motor.
  • External rotor motors have the advantage over brushless internal rotor motors that they rotate more slowly and have a higher torque with the same torque have overall dimensions.
  • a seven-pole external rotor motor has a stator with twelve slots, with every second slot being wound. From this it follows that the field rotates by 60° when changing the phase.
  • the bell surrounding the stator or the external rotor has fourteen magnets or seven pairs of poles, which are distributed over 360°.
  • the outer rotor moves seven times slower than the field, so that the outer rotor turns by only 8.57° when the field moves by 60°. As a result, a low speed is achieved with an external rotor.
  • the brushless electric motor is connected directly to the converter device.
  • a reduction gear which is absolutely necessary when using brushed motors, can be omitted in this preferred development according to the invention.
  • the output shaft of the electric motor is connected directly to the hydraulic pump, i.e. to the drive shaft of the hydraulic pump. Due to the possible omission of the transmission in this embodiment, the costs can be reduced. In particular, however, the space required can be significantly reduced.
  • a particular advantage of using the brushless motor while omitting or greatly simplifying a reduction gear is that efficiency can be greatly improved. In particular due to the friction occurring in the transmission, losses occur which can be greatly reduced by greatly simplifying or even by completely omitting the transmission.
  • the output shaft of the electric motor is preferably arranged in such a way that it is coaxial with the drive shaft of the hydraulic pump. In this way, a simple connection of the shafts can be implemented with little installation space.
  • the current speed is determined via a control device connected to or integrated in the electric motor.
  • the motor speed can be inferred from the voltage induced in the windings. This makes it possible to easily detect that the engine speed is increasing. A sudden increase in engine speed occurs when the pressure valve opens, i.e. as soon as the required pressing force is reached. This increase in engine speed can be determined in a simple manner via the control device and used to switch off the electric motor.
  • the rotational speed sensor required in known pressing devices which is absolutely necessary for determining the increase in rotational speed when the valve is opened, can be dispensed with by using a brushless electric motor according to the invention. As a result, the manufacturing costs can be reduced.
  • this has the advantage that a component that is important for the function of the pressing device is replaced by the control device of the motor, and this results in a considerably more reliable determination of the rotational speed. A failure of the speed sensor, which can lead to significant damage to the pressing tool, can no longer occur.
  • the motor torque and/or the pressing force generated by the pressing jaws is determined or calculated directly via the parameters of the brushless electric motor. This makes it possible in a simple manner to switch off the electric motor automatically when the desired or set pressing force is reached.
  • Another advantage of using a brushless electric motor, in particular in connection with the control device that is already present or connected to the electric motor, is that when the set pressing force is reached or errors occur, the motor can be braked by appropriate control commands or by software .
  • the high level of wear that occurs with brushed motors, which occurs when the motor is braked via the short circuit generated, can thus be avoided.
  • Another advantage of using a brushless electric motor is that sensorless commutation is possible. It is therefore no longer necessary to provide fault-prone speed sensors for monitoring the press force or for process control.
  • an adjustment device is provided.
  • pressing parameters can be entered in a simple manner, for example via keys and a display. These are transmitted to the control device of the electric motor, so that direct, simple control of the electric motor and thus of the whole pressing device is possible.
  • the desired pressing force only has to be entered via the setting device.
  • a mechanical change for example by varying the pressure point at which the valve opens, is not required.
  • the construction of the pressing device is considerably simplified. Furthermore, there are no mechanical components which, particularly due to the high forces that occur, may be damaged or at least require more maintenance.
  • the type of pressing tool used via the setting device it is possible, for example, to enter the type of pressing tool used via the setting device.
  • This has the advantage that a hand-held pressing device can be provided in which the pressing tool can be exchanged.
  • a complex adaptation of the pressing device to the pressing tool is no longer necessary. It is only necessary to enter, for example, a code number for the pressing tool.
  • the type of pressing tool is automatically recognized by the pressing device. This can be done by labeling the pressing tool, which is in particular automatically detected by the control device. The user can thus change the pressing tool and does not have to ensure that the corresponding pressing parameters are adjusted. This avoids, for example, the maximum permissible pressing force for a specific pressing tool being exceeded.
  • a signal output device is connected to the control device of the brushless electric motor.
  • the completion of the compression can be signaled in a simple manner by the signal output device.
  • the occurrence of faults or the need to carry out maintenance can also be signaled by the signal output device.
  • the signal output device can be an acoustic and/or tactile (vibration) signal output device.
  • the particularly acoustic signal output can be realized directly by the control device.
  • the signal output device can also have a display.
  • the hand-held pressing device is operated in a preferred embodiment in such a way that the control device connected to the electric motor, as described above, is used to determine the speed.
  • the control device can also be used to control a signal output device.
  • the hand-held pressing device for connecting pipes using a press fitting by pressing ( 1 ) has a brushless electric motor 10 whose output shaft 12 is connected to an eccentric.
  • a pump piston 16 is operated via the eccentric.
  • the brushless electric motor 10 is connected to a chargeable battery (not shown), such as a rechargeable battery or a power pack or the mains, for the energy supply.
  • the hydraulic fluid is supplied to a chamber 20 via a control valve 18 .
  • Pumping the hydraulic fluid into the chamber 20 causes a working piston 22 to move to the left in the drawing.
  • the end of the working piston 22 on the left in the figure is connected to the pressing jaws 24 of the pressing tool 26 -.
  • the press jaws 24 are closed.
  • the pressing device shown thus has three main components, the pressing tool 26 , a conversion device 28 and the electric motor 10 .
  • a needle valve 30 is provided, which opens the chamber 20 when the pressing force is reached, so that the pressure in the chamber suddenly decreases. Due to this decrease in pressure in the chamber 20, the engine speed increases significantly. This increase in speed is detected by a control device 32, which is connected to the brushless electric motor 10, and causes the electric motor 10 to be switched off. As soon as the electric motor 10 is switched off, the working piston 22 is pushed back into its in 1 shown starting position pushed back.
  • control device 32 can be connected to an adjustment device 34 provided in particular on the housing of the pressing device (not shown). Pump parameters, pressing forces, etc. can be preselected via the setting device 34, which has a display 36 and input keys 38, for example.
  • the brushless electric motor provided according to the invention can be used as a signal output device. This can be an acoustic signal output, a tactile signal output, such as the generation of vibrations, or a act optical signal output via a display.
  • the existing display 36 of the setting device can also be used for signal output.
  • a pressing device is a pressing device for cable lugs ( 2 ).
  • This in 2 schematically illustrated pressing device for cable lugs is shown in a non-sectional side view, the operation of that of the basis 1 corresponds to the pressing tool described.
  • a brushless electric motor 10 is also provided according to the invention, which is also connected to an eccentric.
  • Within a housing 41 are thus the same components as on the basis 1 apparent, arranged. Only the essentially cylindrical intermediate part 42 ( 1 ) omitted. Instead, with the working piston 22 ( 1 ) Jaws 44 ( 2 ) tied together.
  • the pressing jaws 44 are arranged within a pressing jaw head 46 .
  • the pressing jaw head 46 has an opening 48 into which the pressing cable lug is inserted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Presses (AREA)
  • Battery Mounting, Suspending (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (8)

  1. Appareil de serrage à main destiné à relier deux pièces, notamment un tuyau équipé d'une monture de serrage par compression, ledit appareil comprenant un outil de serrage (26) comportant plusieurs mâchoires de serrage (24) et
    un moyen de conversion (28) relié à l'outil de serrage (26) et entraîné par un moteur électrique (10), le moteur électrique (10) étant relié à un piston de pompage (16) au moyen d'un excentrique pour pomper un fluide hydraulique via une vanne de commande (18) dans une chambre (20) du moyen de conversion (28), serrant ainsi les mâchoires de serrage de l'outil de serrage, dans lequel est prévue une soupape à pointeau (30), afin que la soupape à pointeau (30) ouvre la chambre (20) lorsque la force de compression maximale réglée ou prédéfinie est atteinte, diminuant brusquement la pression dans la chambre (20),
    caractérisé en ce que
    le moteur électrique (10) est conçu comme un moteur électrique sans balais,
    le moteur électrique (10) est relié à un moyen de commande (32) servant à commander la vitesse de rotation et la détermination de la vitesse de rotation courante du moteur est effectuée à l'aide du moyen de commande (32) et le moteur électrique (10) est arrêté lorsque la vitesse de rotation augmente de manière significative en raison de la diminution de la pression dans la chambre (20).
  2. Appareil de serrage à main selon la revendication 1, caractérisé en ce que le moteur électrique (10) est conçu sous la forme d'un moteur à rotor extérieur sans balais.
  3. Appareil de serrage à main selon la revendication I, caractérisé en ce que le moteur électrique (10) est conçu sous la forme d'un rotor interne sans balais.
  4. Appareil de serrage à main selon l'une des revendications 1 à 3, caractérisé en ce que le moteur électrique (10) est relié directement au moyen de conversion (28).
  5. Appareil de serrage à main selon la revendication 1 à 4, caractérisé en ce que la détermination du couple du moteur et/ou de la force de serrage générée par les mâchoires de serrage (24) est effectuée à l'aide du moyen de commande (32).
  6. Appareil de serrage à main selon l'une des revendications 1 à 5, caractérisé par un moyen de réglage (34) relié au moyen de commande (32) et servant à entrer des paramètres de serrage.
  7. Appareil de serrage à main selon la revendication 1 à 6, caractérisé par un moyen de sortie de signal (40) relié au moyen de commande (32).
  8. Procédé pour faire fonctionner un moyen de serrage à main selon l'une des revendications 1 à 7, dans lequel
    on démarre la compression,
    on détecte la tension induite dans les enroulements du moteur,
    on détermine la vitesse de rotation du moteur en se fondant sur la tension détectée et
    on arrête le moteur lorsque la vitesse de rotation augmente de manière significative.
EP10781667.0A 2009-11-17 2010-11-17 Presse à guidage manuel Active EP2501523B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202009015515U DE202009015515U1 (de) 2009-11-17 2009-11-17 Handgeführtes Pressgerät
PCT/EP2010/067641 WO2011061212A1 (fr) 2009-11-17 2010-11-17 Presse à guidage manuel

Publications (3)

Publication Number Publication Date
EP2501523A1 EP2501523A1 (fr) 2012-09-26
EP2501523B1 EP2501523B1 (fr) 2015-04-29
EP2501523B2 true EP2501523B2 (fr) 2023-04-19

Family

ID=43536575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10781667.0A Active EP2501523B2 (fr) 2009-11-17 2010-11-17 Presse à guidage manuel

Country Status (6)

Country Link
US (1) US20120284981A1 (fr)
EP (1) EP2501523B2 (fr)
AU (1) AU2010320961B2 (fr)
DE (1) DE202009015515U1 (fr)
ES (1) ES2543168T5 (fr)
WO (1) WO2011061212A1 (fr)

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CN107900968B (zh) * 2017-12-25 2023-12-15 南阳淅减汽车减振器有限公司 一种减震器油缸底盖压装装置
EP3513911B2 (fr) 2018-01-17 2025-03-26 Emerson Professional Tools AG Machine de pressage
JP7083915B2 (ja) * 2018-04-17 2022-06-13 ルーカス ヒュードラウリク ゲーエムベーハー 作業装置または救助装置の動作方法、および作業装置または救助装置
EP3643422B8 (fr) 2018-10-25 2023-07-26 Emerson Professional Tools AG Machine de pressage destinée au pressage d'outils
EP3650176B1 (fr) * 2018-11-07 2025-12-24 Emerson Professional Tools AG Machine à presser
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EP4005733A1 (fr) * 2020-11-27 2022-06-01 Hilti Aktiengesellschaft Engrenage excentrique pour une machine-outil
EP4006382A1 (fr) 2020-11-30 2022-06-01 Hilti Aktiengesellschaft Élément ressort sur le dispositif d'accouplement
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DE202009015515U1 (de) 2009-11-17 2011-04-07 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kommanditgesellschaft Handgeführtes Pressgerät

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0860220A2 (fr) † 1997-02-21 1998-08-26 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE & CO. KG. Presse

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US20120284981A1 (en) 2012-11-15
ES2543168T5 (es) 2023-10-04
EP2501523B1 (fr) 2015-04-29
EP2501523A1 (fr) 2012-09-26
AU2010320961B2 (en) 2015-10-08
WO2011061212A1 (fr) 2011-05-26
HK1175436A1 (en) 2013-07-05
AU2010320961A1 (en) 2012-05-31
DE202009015515U1 (de) 2011-04-07

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