EP2412478B1 - Dispositif de serrage avec amplification de puissance - Google Patents

Dispositif de serrage avec amplification de puissance Download PDF

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Publication number
EP2412478B1
EP2412478B1 EP11172310.2A EP11172310A EP2412478B1 EP 2412478 B1 EP2412478 B1 EP 2412478B1 EP 11172310 A EP11172310 A EP 11172310A EP 2412478 B1 EP2412478 B1 EP 2412478B1
Authority
EP
European Patent Office
Prior art keywords
clamping
threaded
clamping device
threaded sleeve
housing
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
EP11172310.2A
Other languages
German (de)
English (en)
Other versions
EP2412478A2 (fr
EP2412478A3 (fr
Inventor
Marcel Schlüssel
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.)
Gressel AG
Original Assignee
Gressel AG
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 Gressel AG filed Critical Gressel AG
Publication of EP2412478A2 publication Critical patent/EP2412478A2/fr
Publication of EP2412478A3 publication Critical patent/EP2412478A3/fr
Application granted granted Critical
Publication of EP2412478B1 publication Critical patent/EP2412478B1/fr
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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
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/10—Arrangements for positively actuating jaws using screws
    • B25B1/106—Arrangements for positively actuating jaws using screws with mechanical or hydraulic power amplifiers
    • 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
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/10—Arrangements for positively actuating jaws using screws
    • B25B1/103—Arrangements for positively actuating jaws using screws with one screw perpendicular to the jaw faces, e.g. a differential or telescopic screw
    • 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
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • B25B1/2405—Construction of the jaws

Definitions

  • the invention relates to a tensioning device with a force reinforcement according to the preamble of claim 1.
  • Such a tensioning device is made DE 19615335 C1 known.
  • a pressure force is exerted on the movable clamping jaw via the drive.
  • such fixtures are only limited use for today's 5-axis machining due to their limited accessibility.
  • the object of the invention is to provide a clamping device of the type mentioned, which allows optimal accessibility while maintaining high clamping precision.
  • the threaded spindle is designed as a telescopic spindle and the reinforcing mechanism exerts a tensile force on the movable jaw. Due to the telescopic spindle a particularly good accessibility to the workpiece can be achieved. The telescopic spindle also offers the possibility of a large span adjustment with constant clamping precision. The force acting on train mechanism also prevents bending of the body and allows optimal clamping force on the jaws.
  • the threaded spindle designed as a telescopic spindle comprises a first threaded sleeve arranged in a base body of the movable clamping jaw or a base body of the fixed clamping jaw, at least one second threaded sleeve engaging with the first threaded sleeve and one engaging with the second threaded sleeve threaded rod.
  • the second threaded sleeve via an external thread with a continuous internal thread of the first threaded sleeve and the threaded rod via an external thread with a continuous internal thread of the second threaded sleeve in engagement.
  • the external threads are arranged only in the front region of the threaded sleeve or the threaded rod.
  • the telescopic spindle has no exposed thread and is thus well protected against contamination.
  • the threaded rod and the threaded sleeves can be sealed by seals.
  • the reinforcing mechanism includes in a preferred embodiment, an axially displaceable within a housing, connected to the threaded spindle first clamping element and disposed within the housing second clamping element, which are connected to each other via thrust pieces and clamping bolts.
  • a planetary gear is interposed, which expediently includes a arranged on the drive shaft sun gear, a plurality of arranged on the first clamping element as a planet carrier planetary gears and a ring gear on the housing as a ring gear.
  • a detent coupling is provided with a plurality of offset in the circumferential direction of the housing locking elements for engagement in corresponding recesses on the outside of the first clamping element.
  • an adjusting mechanism for adjusting the axial position of the first threaded sleeve can be arranged in the base part of the adjustable clamping jaw.
  • the adjusting mechanism may comprise a laterally arranged in the base part adjusting wheel with a conical pin for engagement in a cone bushing on the outside of the threaded sleeve.
  • the axial adjustment of the threaded sleeve but can also be done via a threaded sleeve retaining locking ring or the like.
  • the in the Figures 1 and 2 shown in a front and side view clamping device includes a fixed jaw 1 and a movable jaw 2, which is adjustable by a drive explained in more detail below with respect to the fixed jaw 1.
  • the fixed jaw 1 and the movable clamping jaw 2 are arranged on respective base body 3 and 4 on a plate-shaped base body 5.
  • the fixed jaw 1 and the movable clamping jaw 2 are designed as top jaws and mounted for easy replacement detachably on the respective base body 3 and 4 respectively.
  • the base body 3 of the fixed clamping jaw 1 is fastened on the base body 5 via illustrated screws, while the base body 4 of the movable clamping jaw 2 is displaceably guided on the base body 5 via longitudinal guides 6.
  • the drive for adjusting the movable jaw 2 relative to the fixed jaw 1 comprises a threaded spindle 7 designed as a telescopic spindle and a reinforcing mechanism 8 arranged within the base body 2 of the fixed jaw 2, by which the clamping force can be increased.
  • the coaxial with the threaded spindle 7 arranged reinforcing mechanism 8 includes a within a substantially cylindrical housing 9 axially displaceable first clamping element 10 having a passage 11 and disposed within the housing 9 second clamping element 12 which passes through the passage 11 of the first clamping element 10 and with this over hemispherical plungers 13 and 14 and interposed clamping bolt 15 is connected.
  • two hemispherical pressure pads 13 are attached to an inner shoulder 16 of the first tensioning element 10 and two hemispherical pressure pads 14 are fastened to the inside of the second tensioning element 12.
  • the clamping bolts 15 arranged between the pressure pieces 13 and 14 have a ball socket 17 at their ends facing the respective pressure pieces 13 and 14, respectively.
  • the first clamping element 10 includes a relative to the inside of the base body 3 outwardly projecting sleeve-shaped projection 18 with an internal thread 19 for connection to a threaded rod 20 of the spindle formed as a telescopic spindle 7. Between the arranged within the neck 18 end of the threaded rod 20 and the second clamping element 12, a compression spring 21 is clamped, which acts on the second clamping element 12 and the arranged on this pressure pieces 13 against the clamping bolt 15 presses.
  • the housing 9 formed in the embodiment shown from a front and rear part 9a and 9b is rotatably supported via a thrust bearing 22 within a receiving opening 23 of the base body 3 and fixed axially via a rear bearing cap 24.
  • a drive shaft 27 is mounted in a bore 25 in the bearing cap 24 and a bore 26 of the second clamping element 10.
  • the planetary gear has a sun gear 28 arranged on the inner end of the drive shaft 27, which is in engagement with a plurality of planetary gears 29 arranged on a planet carrier.
  • the planet carrier is formed by the first clamping element 10. There are several in FIG.
  • FIG. 8 Between the housing 9 and the first clamping element 10 is an in FIG. 8 provided latching coupling provided.
  • This has a plurality of offset in the circumferential direction of the housing 9 mutually offset locking elements 32, which are arranged radially movable in outer recesses 33 and acted upon by leaf springs 34 radially inwardly.
  • the locking elements 32 engage with nose-shaped ends 35 in corresponding recesses 36 on the outside of the first clamping element 10 a.
  • spring-loaded balls or other corresponding locking elements can be used.
  • the designed as a telescopic spindle screw 7 contains according to FIG. 4 a first threaded sleeve 37 disposed in the base body 4 of the movable jaw 2, a second threaded sleeve 38 engaged with the first threaded sleeve 37, and the threaded rod 20 engaged with the second threaded sleeve 38 at one end and secured to the other end is connected to the first clamping element 10.
  • the first threaded sleeve 37 is arranged in a corresponding bore 39 in the base body 4 of the movable clamping jaw 2 and is secured there by a locking ring 40 in the axial direction.
  • the second threaded sleeve 38 is connected via an external thread 41 with a continuous internal thread 42 of the first threaded sleeve 37 in engagement, while the threaded rod 12 is at one end via an external thread 43 with a continuous internal thread 44 of the second threaded sleeve 38 is engaged.
  • the other end of the threaded rod 20 is screwed via an external thread 45 with the internal thread 19 of the first clamping element 10.
  • the external threads 41 and 43 are only in the front region of the second threaded sleeve 38 and the threaded rod 20, so that the telescopic spindle has no exposed thread.
  • 38 are on the locking ring 40 and on the inside of the threaded sleeve
  • FIG. 4 illustrated seals 53 and 54 for sealing engagement with the thread-free cylindrical outer side of the threaded sleeve 38 and the threaded rod 20 is provided.
  • the adjusting mechanism includes a laterally arranged in the base part 4 thumb wheel 46 by the axial position of the first threaded sleeve 37 can be changed within the base body 4.
  • the adjusting wheel 46 which is arranged perpendicularly to the center axis of the bore 39, has at its inner end a conical pin 50 which engages in a cone bushing 51 arranged on the outside of the threaded sleeve 37.
  • the cone bushing 51 is arranged eccentrically to the adjusting wheel 46, so that the threaded sleeve 37 displaced by screwing the adjusting wheel 46 against the force of the disc springs 47 and thereby a gap 52 between the stopper 48 and a collar 55 can be made smaller. If the thumbwheel 46 is unscrewed, there is a large gap 52, so that the threaded sleeve 37 is absorbed by the large gap distance upon actuation of the power stroke against the stop 48 and thus a large part of the power stroke. By contrast, when the adjusting wheel 46 is screwed in, the threaded sleeve 37 is already in contact with the stop 48, so that the power stroke is transmitted 100% to the clamping jaw and the clamping takes place with high clamping force.
  • the first clamping element 10 is blocked with the planetary gears 29 arranged thereon and is no longer rotated about the central axis.
  • the housing 9 is further rotated in a gear ratio 4: 1 via the toothing 30 of the rear part 9b, which serves as the ring gear, during a further rotation on the drive shaft 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Claims (14)

  1. Dispositif de serrage comprenant une mâchoire de serrage fixe (1), une mâchoire de serrage mobile (2) et un entraînement servant à ajuster la mâchoire de serrage mobile (2) par rapport à la mâchoire de serrage fixe (1), sachant que l'entraînement contient une broche filetée (7) et un mécanisme d'amplification (8) servant à amplifier la force de serrage, caractérisé en ce que la broche filetée (7) est réalisée sous la forme d'une broche télescopique, et en ce que le mécanisme d'amplification (8) est réalisé afin d'exercer une force de serrage sur la mâchoire de serrage mobile (2).
  2. Dispositif de serrage selon la revendication 1, caractérisé en ce que la broche filetée (7) comprend une première douille filetée (37) disposée dans un corps de base (4) de la mâchoire de serrage mobile (2) ou dans un corps de base (2) de la mâchoire de serrage fixe (1), au moins une deuxième douille filetée (38) en prise avec la première douille filetée (37) et une tige filetée (20) en prise avec la deuxième douille filetée (38).
  3. Dispositif de serrage selon la revendication 2, caractérisé en ce que la deuxième douille filetée (38) se trouve en prise, par l'intermédiaire d'un filetage extérieur (41), avec un filetage intérieur (42) continu de la première douille filetée (37), et en ce que la tige filetée (20) se trouve en prise, par l'intermédiaire d'un filetage extérieur (43), avec un filetage intérieur (44) continu de la deuxième douille filetée (38).
  4. Dispositif de serrage selon la revendication 3, caractérisé en ce que le filetage extérieur (41) est disposé uniquement dans la zone avant de douille filetée (38), et en ce que le filetage extérieur (43) est disposé uniquement dans la zone avant de la tige filetée (20).
  5. Dispositif de serrage selon l'une quelconque des revendications 2 à 4, caractérisé en ce que la tige filetée (20) et les douilles filetées (37, 38) sont rendues étanches par des joints d'étanchéité (53, 54).
  6. Dispositif de serrage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le mécanisme d'amplification (8) est disposé dans un boîtier (9) disposé de manière à pouvoir tourner sur un palier axial (22) dans une partie de base (3) de la mâchoire de serrage fixe (1) ou dans une partie de base (4) de la mâchoire de serrage mobile (2).
  7. Dispositif de serrage selon la revendication 6, caractérisé en ce que le mécanisme d'amplification (8) contient un premier élément de serrage (10) pouvant être déplacé par coulissement axialement à l'intérieur du boîtier (9), relié à la broche filetée (7) et un deuxième élément de serrage (12) disposé à l'intérieur du boîtier (9), lesquels sont reliés l'un à l'autre par l'intermédiaire de pièces de pression (13, 14) et de boulons de serrage (15).
  8. Dispositif de serrage selon la revendication 7, caractérisé en ce qu'un engrenage planétaire (28, 29, 30) est intercalé entre un arbre d'entraînement (27) du mécanisme d'amplification (8) et le premier élément de serrage (10).
  9. Dispositif de serrage selon la revendication 8, caractérisé en ce que l'engrenage planétaire (28, 29, 30) contient une roue solaire (28) disposée sur l'arbre d'entraînement (27), plusieurs pignons satellites (29) disposés en tant que porte-pignons satellites au niveau du premier élément de serrage (10) et une couronne dentée (30) au niveau du boîtier (9) en tant que roue à denture intérieure.
  10. Dispositif de serrage selon l'une quelconque des revendications 6 à 9, caractérisé en ce qu'un couplage par enclenchement (32, 36) est disposé entre le boîtier (9) et le premier élément de serrage (10).
  11. Dispositif de serrage selon la revendication 10, caractérisé en ce que le couplage par enclenchement contient plusieurs éléments d'enclenchement (32) décalés dans la direction périphérique du boîtier (9) servant à venir en prise avec des renfoncements (36) correspondants au niveau du côté extérieur du premier élément de serrage (10).
  12. Dispositif de serrage selon l'une quelconque des revendications 2 à 11, caractérisé en ce qu'un mécanisme d'ajustement (46, 50, 51) servant à régler la position axiale de la première douille filetée (37) est disposé dans une partie de base (4) de la mâchoire de serrage pouvant être ajustée (2).
  13. Dispositif de serrage selon la revendication 12, caractérisé en ce que le mécanisme d'ajustement (46, 50, 51) comprend une roue de réglage (46) disposée latéralement dans une partie de base (4), pourvue d'un tourillon (50) conique destiné à venir en prise avec une bague conique (51) au niveau du côté extérieur de la douille filetée (37).
  14. Dispositif de serrage selon l'une quelconque des revendications 1 à 13, caractérisé en ce que la broche filetée (7) réalisée sous la forme d'une broche télescopique peut être rallongée par une tige de rallonge (56).
EP11172310.2A 2010-07-30 2011-07-01 Dispositif de serrage avec amplification de puissance Active EP2412478B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202010010867U DE202010010867U1 (de) 2010-07-30 2010-07-30 Spannvorrichtung mit Kraftverstärkung

Publications (3)

Publication Number Publication Date
EP2412478A2 EP2412478A2 (fr) 2012-02-01
EP2412478A3 EP2412478A3 (fr) 2014-05-28
EP2412478B1 true EP2412478B1 (fr) 2015-09-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11172310.2A Active EP2412478B1 (fr) 2010-07-30 2011-07-01 Dispositif de serrage avec amplification de puissance

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EP (1) EP2412478B1 (fr)
DE (1) DE202010010867U1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH708548A1 (de) * 2013-09-02 2015-03-13 Dieter Mosig Zentrumsspanneinrichtung.
CN108942749A (zh) * 2018-08-24 2018-12-07 安徽铭海通科技有限公司 一种便于夹紧的五金加工用夹紧装置
CN112847179A (zh) * 2020-12-24 2021-05-28 江西艾普若科技有限责任公司 一种改进式通讯产品加工用夹持机构
CN114161334B (zh) * 2021-11-12 2023-12-01 广东大钧离合器有限公司 离合器壳体加工用夹持装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320606A (en) * 1940-12-11 1943-06-01 Jesionowski John Work holder
FR1459301A (fr) * 1965-10-08 1966-04-29 Perfectionnements aux étaux-machine
DE4127772C2 (de) * 1991-08-22 1996-06-05 Kesel Georg Gmbh & Co Kg Mechanischer Kraftverstärker
DE4209699A1 (de) * 1992-03-25 1993-09-30 Gressel Ag Aadorf Spannvorrichtung mit Kraftverstärker, insbesondere Maschinenschraubstock
DE19615335C1 (de) * 1996-04-18 1997-10-02 Gressel Ag Spannvorrichtung mit mechanischem Kraftverstärker
US5873000A (en) 1996-07-19 1999-02-16 Compaq Computer Corporation System incorporating hot docking and undocking capabilities without requiring a standby or suspend mode by placing local arbiters of system and base into idle state
US5893551A (en) * 1997-05-16 1999-04-13 Cousins; Joseph Russell Vise with fully machinable jaws

Also Published As

Publication number Publication date
DE202010010867U1 (de) 2011-11-02
EP2412478A2 (fr) 2012-02-01
EP2412478A3 (fr) 2014-05-28

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