EP2135709B1 - Outil de compression électrique - Google Patents

Outil de compression électrique Download PDF

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Publication number
EP2135709B1
EP2135709B1 EP09162347.0A EP09162347A EP2135709B1 EP 2135709 B1 EP2135709 B1 EP 2135709B1 EP 09162347 A EP09162347 A EP 09162347A EP 2135709 B1 EP2135709 B1 EP 2135709B1
Authority
EP
European Patent Office
Prior art keywords
pump
housing
piston
electrically operated
press tool
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
EP09162347.0A
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German (de)
English (en)
Other versions
EP2135709A2 (fr
EP2135709A3 (fr
Inventor
Beat Schweizer
Martin Moritz
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.)
Von Arx AG
Original Assignee
Von Arx AG
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Filing date
Publication date
Application filed by Von Arx AG filed Critical Von Arx AG
Publication of EP2135709A2 publication Critical patent/EP2135709A2/fr
Publication of EP2135709A3 publication Critical patent/EP2135709A3/fr
Application granted granted Critical
Publication of EP2135709B1 publication Critical patent/EP2135709B1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/042—Hand tools for crimping
    • H01R43/0427—Hand tools for crimping fluid actuated hand crimping tools

Definitions

  • the present invention describes an electrically operated press tool with a driven by a drive unit hydraulic pump which acts on a hydraulic piston-cylinder unit, which is operatively connected to a roll holder, roll on the jaws of a clamping nipper and thus move the same relative to each other, and that the pressing tool next to a Pump housing having a housing wall and a housing cover, an actuating valve for opening a passage between the pump housing housing and the piston-cylinder unit.
  • Portable, hydraulically actuated pressing tool devices of the type mentioned are used for pressing of coupling elements, such as press sleeves, press fittings, pipe sleeves, telescoped pipe sections and the like.
  • the pressing tools have a pressing unit comprising a clamping jaw with clamping jaws, which form a pressing space for receiving the coupling element to be pressed.
  • the pressing pressure required for pressing is supplied by a hydraulic unit.
  • a hydraulic unit Downstream of the piston-cylinder unit is a hydraulic unit, which comprises a hydraulic pump in a pump-receiving housing.
  • Hydraulic fluid generally hydraulic oil
  • Hydraulic fluid is pumped from a fluid reservoir and / or from the pump receiving housing into the hydraulic pump and from the hydraulic pump into the piston-cylinder unit by high-pressure lines.
  • the piston is moved in the direction of actuation and the clamping pliers are closed. If such a clamping operation is completed, the hydraulic oil is pumped back into the hydraulic tank in many devices and in some devices of this type a direct return from the supply line to a return line or suction is effected via a corresponding actuating valve.
  • the functions mentioned require a structure as just described. Accordingly, miniaturization is practically impossible without loss of performance. A reduction of the pressing forceps device can therefore be achieved only with innovative measures.
  • piston pumps have been increasingly used recently, which, in addition to a weight saving, can also achieve higher liquid pressures than gear pumps and thus can deliver high outputs.
  • the achievable weight savings do not lead to the desired results and the increase in the fluid pressure occurring causes new difficulties for the known press tools.
  • the DE102007005837 describes a hydraulic unit of a linearly configured pressing tool device, which is delimited by an elastic wall or a flexible hose and sealingly surrounds the region of the piston pump and a control valve.
  • the hydraulic fluid is maintained in a hydraulic fluid circuit by returning the hydraulic fluid through passages leading into a hydraulic fluid reservoir.
  • the present invention has set itself the task of creating a weight reduction of an electrically operable press tool by optimizing the design of the hydraulic unit.
  • FIG. 7 an embodiment of a press tool device 1 according to the prior art is shown.
  • the actual functional part is packed here in a device housing made of plastic.
  • the clamping pliers 10 which has two clamping jaws 11 and is held by a secured pin 14 in a fork-shaped receptacle 13.
  • the rollers which are rotatably mounted in a roller holder 62.
  • piston-cylinder unit 5 By means of a piston-cylinder unit 5, these rollers are moved forward, with the jaws 11 close.
  • the jaws 11 are shown in the closed state.
  • the electrically operated press tool unit 1 has a drive unit 2, a hydraulic unit 3, a piston-cylinder unit 5 and a press unit 6.
  • the illustrated in the following figures, preferred embodiment of the pressing device is executed pistol-shaped, whereby a linear configuration according to the prior art is conceivable.
  • the hydraulic unit 3 connects the drive unit 2 and the piston-cylinder unit 5, the longitudinal axis of the drive unit 2 and the longitudinal axis of the press unit 6 being approximately parallel to one another.
  • An electronic control device, as well as an electronic display device are omitted for simplicity in the figures.
  • the electronic control device is used to trigger and carry out the pressing operations, wherein a piston 64 is advanced linearly by a constructed in the hydraulic unit 3 fluid pressure of a few hundred bar.
  • the electronic display device indicates, for example, whether the pressing process has been carried out as desired and how many pressing operations have been carried out so far.
  • a piston rod 63 which is mounted in a spring 65, moves linearly in the direction of the fork-shaped receptacle 13 of the pressing unit 6.
  • The, attached to the piston rod 63 roller holder 62 closes the jaws 11 in the linear feed of the piston 64, whereby a pipe fitting on at least one tube can be fastened.
  • the jaws 11 are held by the bolt 14. The correct fit of the jaws 11 is read by the electronic control device and displayed by the electronic display device.
  • the drive unit 2 comprises an AC or DC electric motor 20, which has a motor shaft, which leads into a gear 21, in this embodiment, in a planetary gear 21.
  • the gear 21 has a hollow shaft 24 into which an eccentric shaft 22 is inserted and is held in a form-fitting manner in the hollow shaft 24.
  • the rotational movement of the hollow shaft 24, which is translated by the transmission 21, is transmitted to the eccentric shaft 22.
  • the connection between the hollow shaft 24 and the eccentric shaft 22 is located in the region of a transmission flange 306 on a pump housing 30 of the hydraulic unit. 3
  • the hydraulic unit 3 comprises a piston pump 320 and is enclosed and sealed by the pump receiving housing 30, the pump receiving housing 30 having a housing wall 300, a housing cover 301 and a flexible rubber-elastic housing wall 302 made of an elastomer.
  • the attachment of the Drive unit 2 on the pump receiving housing 30 is ensured solely by the connector between the hollow shaft 24 and the eccentric shaft 22, wherein the connector is securable by unillustrated securing means against unwanted loosening.
  • the transmission flange 306 opposite is located on the eccentric shaft 22 an eccentric shaft bearing 304, which is non-positively and / or positively connected to the eccentric shaft 22, wherein the eccentric shaft bearing 304 rotatably mounted in a bearing 305.
  • the bearing 305 is replaceably held in a recess in the housing wall 300.
  • the eccentric shaft 22 is linearly movable in the direction of the axis of rotation only with little play, and thus can be moved substantially rotationally.
  • the bearing 305 is inserted into a recess in the pump housing 30 and fixed by the housing cover 301.
  • the housing wall 300 can be provided with reinforcing ribs 311, whereby bending moments are further reduced.
  • An eccentric 23 is non-releasably connected to the eccentric shaft 22 non-positively and / or positively, so that the eccentric disc 23 is carried along with the rotational movement of the eccentric shaft 22.
  • a piston pump 320 Completely within the pump receiving housing 30 is located a piston pump 320 whose movable pump piston 321 is operatively connected to the eccentric disc 23.
  • the pump piston 321 By rotations of several thousand revolutions per minute of the motor 20 via the gear 21 driven eccentric shaft 22, the pump piston 321 is also often linearly displaced.
  • hydraulic fluid is sucked through an inlet valve 322 and through an outlet valve 323 in a Pump flange continued in the piston-cylinder unit 5, whereby a high fluid pressure of several hundred bar is built up.
  • an actuation valve 50 is opened, whereby the piston 64 is displaced linearly, after which the pumping process can begin anew when the actuation valve 50 is closed.
  • the piston pump 320 is completely disposed within the pump receiving housing 30, the pump receiving housing 30 partially transverse.
  • a piston stop 310 may be formed on the housing wall 300, whereby a stable mounting of the piston pump 320 is supported.
  • At least one pump attachment means 324 fixably fixes the piston pump 320 inside the pump housing 30 to the housing wall 300.
  • a pump flange 326 and the outlet valve 323 point in the direction of the piston cylinder unit 5.
  • the piston cylinder unit 5 is provided with a connection cylinder 55 which defines a pump passage 313 of the pump Pump receiving housing 30 is arranged transversely through the housing wall 300 protruding.
  • the pump flange 326 of the piston pump 320 is mounted in direct contact with the connecting cylinder 55 pressed onto the piston-cylinder unit 5.
  • An O-ring 325 in the region of the outlet valve 323 seals the interior of the pump housing 30 to the piston-cylinder unit 5.
  • the housing wall 300 is plugged with a molded centering pin 312 on the piston-cylinder unit 5 in a predetermined position and with the pump attachment means 324, which is inserted for example by a housing mounting hole 309, positively and / or non-positively attached.
  • the flexible housing wall 302 is placed on the edge of the housing wall 300, which comprises a circumferential sealing groove 303.
  • a liquid-tight fixing of the pump receiving housing 30 is achieved by fixing the housing cover 301 with at least one lid fastening means 308 in at least one cover bore, wherein a portion of the flexible housing wall 302 engages in the sealing groove 303.
  • the pump-receiving housing 30 Due to the direct attachment of the piston pump 320 on the piston-cylinder unit 5 presented here, the pump-receiving housing 30 according to the invention remains free of high pressure. Inside the pump receiving housing 30 are no high pressure lines, which is why it is designed to be free of lines.
  • the pump housing 30 is filled with hydraulic fluid, but the fluid pressure within the pump receiving housing 30 is very low and it comes only to pressure oscillations due to the periodic deflections of the pump piston 321 with low pressure fluctuations.
  • the piston-cylinder unit 5 has a liquid inlet 53 and a liquid outlet 54, both of which are easily accessible and allow a simple level correction of the hydraulic fluid. If a compression operation has not been completed and therefore the fluid pressure through the actuation valve 50 has not been partially or completely drained, an emergency stop valve may be provided 51 are actuated with an emergency release lever 52, whereby the overpressure is drainable.
  • the pump housing 30 is filled to the lower edge of the housing cover 301 with hydraulic fluid. After assembly of all components, excess air is pumped out of the pump housing 30. This aspiration of the air prevents the formation of bubbles, which optimizes the pumping process.
  • the movable components are mounted within the pump receiving housing 30 in such a way that almost no forces act on the housing wall 300 and the housing cover 301, thus resulting in a negligible bending stress in the housing wall 300. For this reason, it is possible to manufacture the housing wall 300 and the housing cover 301 from a thermoplastic by injection molding. It is advantageous that the housing walls 300 and housing cover 301 produced by injection molding no longer need to be reworked, which reduces the production time and the manufacturing costs. In order to further increase the fatigue strength of the pump receiving housing 30, it is advantageous to mold reinforcing ribs 311 into the housing wall 300.
  • thermoplastics such as polyamide with a glass fiber reinforcement
  • the pump housing 30 can be installed directly to limit the hydraulic unit 3 and for receiving the piston pump 320.
  • the pump receiving housing 30 Due to the cover of the pump receiving housing 30 with the rubber-elastic housing wall 302, the pump receiving housing is configured volume-adjustable. According to the prior art, a separate element was used for volume adaptation, which in turn requires additional lines and additional space. From the EP 1689563 a system is known in which the hydraulic oil receptacle is designed by a rubber-elastic cuff around the piston-cylinder unit. For such a configuration would be necessary here separate hydraulic lines, which are undesirable.
  • a maintenance of the hydraulic unit 3, for example, an exchange of the piston pump 320 is easily possible by the discharge of the hydraulic fluid from the liquid drain 54, the at least one lid fastening means 308 is released and the housing cover 301 including the flexible housing wall 302 is removed from an elastomer. Subsequently, the piston pump 320 is removed by the removal of the pump attachment means 324 and can be replaced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Press Drives And Press Lines (AREA)
  • Gripping On Spindles (AREA)
  • Reciprocating Pumps (AREA)

Claims (8)

  1. Outil de compression (1) fonctionnant électriquement avec une pompe hydraulique (320) entraînée au moyen d'une unité d'entraînement (2), laquelle agit sur une unité de cylindre à piston hydraulique (5) qui est en liaison active avec un porte-rouleaux (62) dont les rouleaux se déroulent sur des mâchoires de serrage (11) d'une pince de serrage (10) et font ainsi bouger ces mêmes l'une par rapport à l'autre, et l'outil de compression (1) présentant, en plus d'un carter de logement de pompe (30) avec une paroi de carter (300) et un couvercle de carter (301), une soupape de commande (9) pour l'ouverture d'un passage entre le carter de logement de pompe (30) et l'unité de cylindre à piston (5),
    caractérisé en ce que le carter de logement de pompe (30) est réalisé sans conduites, une bride de pompe (326) avec une soupape de refoulement (323) de la pompe hydraulique (320) étant fixée par pressage directement sur un cylindre de liaison (55) de l'unité de cylindre à piston (5) et qu'ainsi, seulement des oscillations de pression avec une faible pression de liquide apparaissent à l'intérieur du carter de logement de pompe (30).
  2. Outil de compression (1) fonctionnant électriquement selon la revendication 1,
    caractérisé en ce qu'au moins un moyen de fixation de pompe (324) relie directement par pressage, de manière non détachable et détachable, la pompe à piston (320) à la bride de pompe (326) sur le cylindre de liaison (55) à l'intérieur du carter de logement de pompe (30) de telle sorte que l'intérieur du carter de logement de pompe (30) n'est pas sous haute pression.
  3. Outil de compression (1) fonctionnant électriquement selon la revendication 1,
    caractérisé en ce que le cylindre de liaison (55) traverse un passage de pompe (313) dans la paroi de carter (300) du carter de logement de pompe (30).
  4. Outil de compression (1) fonctionnant électriquement selon la revendication 1,
    caractérisé en ce que la paroi de carter (300) est fabriquée en une matière thermoplastique.
  5. Outil de compression (1) fonctionnant électriquement selon la revendication 4,
    caractérisé en ce que la paroi de carter (300) est fabriquée en polyamide avec un renforcement par fibres de verre.
  6. Outil de compression (1) fonctionnant électriquement selon la revendication 5,
    caractérisé en ce que la paroi de carter (300) est dotée de nervures de renforcement (311).
  7. Outil de compression (1) fonctionnant électriquement selon la revendication 1,
    caractérisé en ce qu'un arbre à excentrique (22) pouvant être entraîné par l'unité d'entraînement (2) est maintenu en liaison active dans un palier (305) à l'intérieur du carter de logement de pompe (30) de manière rotative avec un piston de pompe (321) de la pompe hydraulique (320).
  8. Outil de compression (1) fonctionnant électriquement selon la revendication 1,
    caractérisé en ce que le carter de logement de pompe (30) est recouvert par une paroi de carter (302) élastique comme du caoutchouc de telle sorte que le carter de logement de pompe (30) forme simultanément un récipient de collecte d'huile hydraulique adaptable au volume.
EP09162347.0A 2008-06-18 2009-06-10 Outil de compression électrique Active EP2135709B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH9422008 2008-06-18

Publications (3)

Publication Number Publication Date
EP2135709A2 EP2135709A2 (fr) 2009-12-23
EP2135709A3 EP2135709A3 (fr) 2015-04-29
EP2135709B1 true EP2135709B1 (fr) 2016-03-23

Family

ID=41066496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09162347.0A Active EP2135709B1 (fr) 2008-06-18 2009-06-10 Outil de compression électrique

Country Status (3)

Country Link
US (1) US8151703B2 (fr)
EP (1) EP2135709B1 (fr)
CN (1) CN101607390B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH699690B1 (de) * 2008-10-03 2012-07-31 Arx Ag Rollenhaltereinheit.
CN102069373B (zh) * 2010-11-23 2012-07-25 江苏速升自动化装备股份有限公司 液压压紧装置
US9199389B2 (en) * 2011-04-11 2015-12-01 Milwaukee Electric Tool Corporation Hydraulic hand-held knockout punch driver
CN102416603B (zh) * 2011-12-15 2013-01-30 苏州百泰柯机械有限公司 一种冲击式电动压接或剪切钳
US9016317B2 (en) 2012-07-31 2015-04-28 Milwaukee Electric Tool Corporation Multi-operational valve
US8935948B1 (en) * 2013-02-17 2015-01-20 Jack T Gregory Electric-hydraulic riveter and crimper hand power tool
WO2016057326A1 (fr) 2014-10-06 2016-04-14 Milwaukee Electric Tool Corporation Outil hydraulique
CN106289652A (zh) * 2016-10-14 2017-01-04 芜湖全程智能科技有限公司 一种abs电磁阀柱塞泵及储液室活塞测试装置
US10677238B2 (en) 2017-11-08 2020-06-09 Ingersoll-Rand Industrial U.S., Inc. Filled resin layer separated pump housing
EP3513912A1 (fr) 2018-01-22 2019-07-24 Von Arx AG Appareil de pressage à commande manuelle
TWI717112B (zh) * 2019-11-19 2021-01-21 科頡工業股份有限公司 活塞泵及具有該活塞泵的夾持裝置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216213A1 (de) * 2002-04-10 2003-10-23 Klauke Gmbh Gustav Elektrohydraulisches Verpressgerät und Verfahren zum Betreiben desselben
US5125324A (en) * 1988-02-10 1992-06-30 Daia Industry Co. Ltd. Portable hydraulically operated device incorporating automatic drain valve
ATE347973T1 (de) * 2000-05-25 2007-01-15 Arx Ag Presswerkzeug für die verpressung von kupplungselementen
US20030230132A1 (en) * 2002-06-17 2003-12-18 Emerson Electric Co. Crimping apparatus
CN100423902C (zh) * 2003-12-04 2008-10-08 沃恩阿克斯公开股份有限公司 电动压制工具
US7260975B2 (en) * 2005-02-16 2007-08-28 Emerson Electric Co. Compression tool jawset
DE102007005837B4 (de) * 2006-02-03 2016-04-07 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Antriebseinheit für ein Preßgerät

Also Published As

Publication number Publication date
CN101607390B (zh) 2013-07-24
EP2135709A2 (fr) 2009-12-23
CN101607390A (zh) 2009-12-23
EP2135709A3 (fr) 2015-04-29
US20100000425A1 (en) 2010-01-07
US8151703B2 (en) 2012-04-10

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