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EP3271112B1 - Schraubstock - Google Patents

Schraubstock Download PDF

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Publication number
EP3271112B1
EP3271112B1 EP16701415.8A EP16701415A EP3271112B1 EP 3271112 B1 EP3271112 B1 EP 3271112B1 EP 16701415 A EP16701415 A EP 16701415A EP 3271112 B1 EP3271112 B1 EP 3271112B1
Authority
EP
European Patent Office
Prior art keywords
spindle
clamping jaw
vice
clamping
guide bars
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
EP16701415.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3271112A1 (de
Inventor
Reiner Hippenstiel
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.)
Ludwig Ehrhardt GmbH
Original Assignee
Ludwig Ehrhardt 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 Ludwig Ehrhardt GmbH filed Critical Ludwig Ehrhardt GmbH
Publication of EP3271112A1 publication Critical patent/EP3271112A1/de
Application granted granted Critical
Publication of EP3271112B1 publication Critical patent/EP3271112B1/de
Active 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
    • 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
    • B25B1/02—Vices with sliding jaws
    • 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
    • B25B1/2489—Slideways

Definitions

  • the invention relates to a vice for clamping workpieces.
  • vises are known from the prior art, which serve to clamp workpieces, for example, for machining the workpieces in the clamped state.
  • FIGS. 3A and 3B show various views of a conventional vise 1, which is designed as a jaw tensioner.
  • the vise 1 has two jaw receivers 2, 3, at the top of each of which a clamping jaw can be screwed, which is known per se from the prior art.
  • the jaw receptacle 2 is in this case fixed by means of a tongue and groove connection 4 fixed to a lower part 5, ie the jaw holder 2 does not move in a clamping operation.
  • the other jaw holder 3, however, is moved in a clamping operation in the direction of the double arrow.
  • the clamping jaw receptacle 3 is mounted on a displaceable carriage 6, which is guided in the direction of the double arrow slidably in the lower part 5.
  • a carriage guide which consists essentially of laterally integrally formed on the carriage 6 springs 7, 8, wherein the springs 7, 8 in corresponding longitudinal grooves in the upwardly projecting legs of the substantially U-shaped Lower parts 5 are arranged.
  • the displacement of the jaw holder 3 is in this case by rotation of a spindle 9 causes, which is known per se from the prior art.
  • FIGS. 4A and 4B show another embodiment of a conventional vise 1, this embodiment partially with the above-described and in the FIGS. 3A and 3B illustrated embodiment, so reference is made to avoid repetition of the above description, wherein the same reference numerals are used for corresponding details.
  • a special feature here is that the fixed jaw receptacle 2 is fixed by a screw connection to the lower part 5.
  • FIGS. 5A and 5B show a further embodiment of a conventional vise 1, which partially coincides with the conventional embodiments described above, so reference is made to avoid repetition of the above description, wherein the same reference numerals are used for corresponding details.
  • a special feature of this embodiment is that the spindle 9 is axially fixed by a bolt 10, wherein the bolt 10 is fitted from below into a vertical bore in the lower part 5 and projects upwards into an annular groove 11 in the spindle 9, whereby the Spindle 9 is fixed in the axial direction.
  • springs 7, 8 are arranged on the carriage 6 adjacent to the underside of the carriage 6 and not - as in the FIGS. 3A and 3B - In the vertical direction in the middle of the carriage. 6
  • FIGS. 6A and 6B show a further embodiment of a conventional vise 1, which also partially in accordance with the embodiments described above, so reference is made to avoid repetition of the above description, wherein the same reference numerals are used for corresponding details.
  • a special feature of this embodiment is that the carriage guide for the linearly displaceable guide of the carriage 6 guide rails 12, 13 which are screwed with fastening screws 14, 15 from above on the upwardly projecting legs of the U-shaped base 5, wherein the guide rails 12, 13 hold the carriage 6 in the lower part 5.
  • the known vices 1 described above have various disadvantages. Of particular importance, however, is the fact that the slide guide of the carriage 6 always has an unavoidable height clearance. This means that the carriage 6 and thus also the jaw receptacles 2, 3 and the clamping jaws mounted thereon have a vertical clearance. This vertical play of the jaws can in turn lead to an oblique clamping of the workpiece.
  • the invention is therefore based on the object, the unwanted vertical play of the clamping jaws in such Minimize vise.
  • the vise according to the invention initially has, in accordance with the prior art, two clamping jaw receptacles, on each of which a clamping jaw can be mounted, which is known per se from the prior art.
  • the clamping jaws can be screwed tight on the jaw receptacles.
  • the invention is not limited to a gland with respect to the mounting of the jaws on the jaw receptacles.
  • the vise according to the invention in accordance with the prior art comprises a fixed base.
  • the vise according to the invention comprises, in accordance with the prior art, a slide guide in order to displaceably guide at least one clamping jaw receptacle.
  • the vise according to the invention can optionally be designed as a center tensioner or as a jaw tensioner.
  • a jaw tensioner one of the two jaw receptacles is fixed in position, while the other jaw receptacle is displaceable in order to clamp a workpiece.
  • both clamping jaw shots are linearly displaceable and are moved in opposite directions.
  • the carriage guide has in the vise according to the invention in accordance with the prior art at least two guide rails, which are attached to the lower part.
  • the guide rails in the vice according to the invention are not attached to the upper side of the lower part, but are attached laterally to the lower part of the vise. This is advantageous because it allows the vertical height clearance of the jaw receptacles can be reduced to almost zero, as will be described in detail below.
  • the guide rails are each screwed by at least one fastening screw laterally on the lower part, wherein the fastening screws of the guide rails can each be aligned horizontally.
  • the vise according to the invention thus differs from the prior art also by the orientation of the fastening screws for fastening the guide rails.
  • the guide rails in the pre-assembled state with its bottom does not rest on the base.
  • the preassembled state here is the state in which the attachment of the guide rails is not yet tightened.
  • a gap (eg 1/10 mm - 2/10 mm), allowing the pre-assembled state a vertical positioning of the guide rails relative to the lower part in order to reduce the height play of the slide guide, especially to zero.
  • the guide rails are therefore initially placed loose. Subsequently, the guide rails are then pushed so far down to the vertical play of the carriage almost on Zero is reduced. Subsequently, the guide rails are then attached to the lower part by tightening the mounting screws. This makes it possible to reduce the height clearance of the carriage and thus also the unwanted height clearance of the clamping jaws almost independent of manufacturing tolerances to zero.
  • the mounting screws for mounting the guide rails on the lower part allow in the preassembled state vertical play of the guide rails relative to the mounting screws. This means that the guide rails can still be positioned in the vertical direction before tightening the mounting screws to reduce the unwanted height clearance.
  • the guide rails preferably have horizontally extending through holes in order to be able to pass the fastening screws can. It is advantageous if the inner diameter of these through holes in the guide rails is greater than the outer diameter of the fastening screws. In this way, there is the possibility that the guide rails after insertion of the mounting screws and before tightening the mounting screws can still be positioned in the vertical direction to reduce the unwanted height clearance.
  • the guide rails each have a horizontal leg which engages around the jaw receptacles above to prevent upward movement of the jaw receptacles.
  • the guide rails preferably also have a vertical leg, which engages around the clamping jaw receptacles laterally outside, to a sideways movement of the clamping jaw receptacles to prevent.
  • the guide rails therefore preferably have a cross-section which is substantially L-shaped.
  • the guide rails can extend over the entire length of the vise.
  • a plurality of guide rails are arranged one behind the other.
  • the guide rails together with the lower part form a longitudinal groove in which laterally molded-in springs engage in the clamping jaw receptacles.
  • the slide guide thus preferably has a tongue and groove connection in the vice according to the invention, which allows a displacement of the carriage with the movable clamping jaw receiving relative to the fixed lower part and the fixed guide rails.
  • the displacement of the displaceable jaw receptacle is preferably carried out by a rotatable spindle, which is known per se from the prior art.
  • the rotatable spindle is in this case rotatably mounted in a spindle bearing, which is also known from the prior art.
  • this spindle bearing is preferably carried out exclusively by a threaded engagement of the spindle in the two jaw receptacles.
  • the jaw tensioner according to the invention therefore preferably has no separate pivot bearing for supporting the spindle.
  • the fixed jaw tensioner according to the invention preferably also has no separate axial fixing in order to fix the spindle in the axial direction.
  • the fixation of the stationary clamping jaw receptacle on the lower part can in the fixed jaw tensioner according to the invention - as in the known embodiment according to the FIGS. 3A and 3B -
  • a tongue and groove connection which is aligned transversely to the clamping direction.
  • the stationary jaw receptacle is bolted to the lower part.
  • other types of attachment are possible in the invention, to secure the stationary jaw receiving the lower part.
  • the threaded engagements of the spindle in the two jaw receptacles are in opposite directions, so that a rotation of the spindle in the one direction of rotation contracts the jaw receivers, whereas a rotation of the spindle in the opposite direction pulls the two jaws apart.
  • the spindle in the threaded engagement with the stationary jaw receiving a right-hand thread and in the threaded engagement with the displaceable jaw receiving a left-hand thread.
  • the stationary clamping jaw receptacle is preferably clamped in the lateral direction between the guide rails with a press fit, in order to fix the stationary clamping jaw receptacle in a stationary manner.
  • the displaceable jaw receiving device is preferably clamped in the lateral direction between the guide rails with a clearance fit to allow a displacement of the displaceable jaw receiving.
  • both jaw recordings displaced are.
  • the displacement of the jaw receptacles is preferably carried out by a rotatable spindle which is rotatably mounted in a spindle bearing.
  • an axial fixing is preferably provided, which axially fixes the spindle in the vise.
  • the axial fixation engages in the formed as a center vice vice on the spindle only one side in the region of one of the two displaceable jaw receptacles and does not protrude into the space between the two jaw shots into it.
  • This is advantageous because the axial fixation would otherwise result in an arrangement in the space between the two jaw receptacles that the gap is rugged so that chips could accumulate there.
  • the spindle has a thread-free, smooth lateral surface in the intermediate space between the two clamping jaw receptacles.
  • the axial fixation of the spindle bearing can, for example - as in the known embodiment according to the FIGS. 5A and 5B - Made by a bolt which is inserted from below into the lower part of the vise and engages with its free end up in an annular groove in the spindle to fix the spindle axially.
  • the bolt with its free end not only causes an axial fixation of the spindle, but also forms a bearing shell for the rotatable mounting of the spindle.
  • FIGS 1A-1D show different views of a first embodiment of a vise 1 according to the invention, which partially with the above-described and in the Figures 3A-6B illustrated conventional vices 1, so that to avoid repetition of the above description of the conventional vices. 1 the same reference numbers are used for corresponding details.
  • the vise 1 according to the invention is formed in this embodiment as a center tensioner. This means that the two clamping jaw receptacles 2, 3 are displaceable in the direction of the double arrow.
  • a special feature of this embodiment consists in the carriage guide for displaceable guidance of the two clamping jaw receptacles 2, 3.
  • the carriage guide the two substantially L-shaped guide rails 12, 13, which are screwed by means of fastening screws 14, 15 laterally to the lower part 5.
  • the two guide rails 12, 13 each have a vertical leg 16, 17, wherein the two vertical legs 16, 17 each have a through hole for the implementation of the two fastening screws 14, 15. It is important that the inner diameter of the two through holes in the two vertical legs 16, 17 is greater than the outer diameter of the two fastening screws 14, 15. This offers the advantage that the guide rails 12, 13 in the preassembled state, i. before tightening the two mounting screws 14, 15 can still be adjusted in height to reduce the unwanted height clearance of the two clamping jaws shots 2, 3 almost to zero.
  • the guide rails 12, 13 so initially loosely mounted, the mounting screws 14, 15 are only loosely tightened. Subsequently, the guide rails 12, 13 then pushed so far down to the jaw shots 2, 3 have no height clearance more. In this state, the fastening screws 14, 15 are then tightened so that the guide rails 12, 13 are fixed in an altitude in which almost no height clearance of the jaw receivers 2, 3 remains.
  • substantially L-shaped guide rails 12, 13 each also have a horizontal leg 20, 21 which engage around the laterally projecting springs 7, 8 on the clamping jaw receptacles 2, 3 above.
  • the vise 1 has an axial fixation in order to axially fix the spindle 9.
  • This Axialfix ist consists essentially of the bolt 10 which is inserted from below into the lower part 5 and engages with its free end in the annular groove 11 in the spindle 9 and the spindle 9 thereby fixed in the axial direction.
  • the bolt 10 is in this case arranged in the vise 1 on one side in the region of the clamping jaw 2 and does not extend into the space between the two jaw receptacles. This is advantageous because of the gap between the two Clamping jaw fixtures otherwise would be rugged by the Axialfixmaschine and would be prone to contamination. For this reason, the spindle 9 in the space between the two jaw receptacles 2, 3 and a smooth, thread-free lateral surface.
  • FIGS. 2A-2D show a second embodiment of a vise 1 according to the invention, which partially coincides with the vices 1 described above, so reference is made to avoid repetition of the above description, wherein the same reference numerals are used for corresponding details.
  • the vise 1 is formed in this embodiment as a jaw tensioner. This means that the clamping jaw 2 is fixedly attached to the lower part 5 and does not move during a clamping operation. For this purpose, the clamping jaw 2 is connected by the tongue and groove connection 4 with the lower part 5.
  • the other jaw holder 3 can be moved by rotating the spindle 9 in the direction of the double arrow.
  • Another advantage of the two vices 1 according to the invention is also that all surfaces are accessible for surface grinding and for heat treatment.
  • the longitudinal grooves of the carriage guide in the FIGS. 3A and 5A difficult to access for subsequent material processing.
  • the two clamping jaw receivers 2, 3 are held down in the vertical direction only by the guide rails.
  • the stationary clamping jaw 2 in the prior art according to the FIGS. 3A, 3B and 4A, 4B firmly bolted to the lower part 5, while the displaceable clamping jaw receptacle 3 is held in the vertical direction by the carriage guide.
  • this has the consequence that the stationary clamping jaw receptacle 2 yields differently during a clamping operation than the displaceable clamping jaw receptacle 3, so that the workpiece is clamped somewhat obliquely.
  • both clamping jaw receptacles 2, 3 are held in the vertical direction by the guide strips 12, 13 and therefore also yield evenly during a clamping operation.
  • This uniform yielding of the two clamping jaw receptacles 2, 3 is in turn advantageous because the workpiece is thereby clamped straight.
  • FIGS 7A-7E show different views of another embodiment of a vise 1 according to the invention, this embodiment is partially with the embodiment according to the Figures 1A-1D matches. To avoid repetition, reference is therefore made to the above description, wherein the same reference numerals are used for corresponding details.
  • a peculiarity of this embodiment is that the vise 1 avoids mechanical overdeterminations that may otherwise occur when long workpieces (e.g., rails, profiles) are tensioned by a plurality of scraper sticks juxtaposed along the length of the workpiece to be clamped.
  • the long workpieces to be clamped usually have lateral deviations. If now the adjacently arranged vices are aligned exactly on a line, then the lateral deviations of the workpiece to be clamped lead to mechanical stresses, since the overall system is mechanically over-determined.
  • the vise 1 according to the invention also makes it possible to avoid such stresses in this variant Clamping a long workpiece (eg rail).
  • the vise 1 therefore has instead of the bolt 10 for Axialfixierung the spindle 9, a clamping element 10 ', which engages with its upper side in the annular groove 11 in the spindle 9, so that the clamping element 10', the spindle 9 can fix axially.
  • the clamping element 10 ' is arranged in the lower part 5 with a certain axial play, i. the clamping element 10 'is displaceable in the lower part 5 corresponding to the axial play in the axial direction.
  • the clamping element 10 ' has an axial bore, through which a locking spindle 25 is guided.
  • the axial bore in the clamping element 10 ' has an internal thread which is in a threaded engagement 26 with an external thread on the lateral surface of the locking spindle 25. A rotation of the locking spindle 25 thus leads to a corresponding axial displacement of the clamping element 10 '.
  • the clamping element 10 ' has two arms 10.1, 10.2, which are laterally expandable by the locking spindle 25, ie in Figure 7E up or down to clamp the clamping element 10 'in the lower part 5.
  • the locking spindle 25 has a cone end 27, which tapers towards its free end.
  • the long workpiece e.g., rail
  • the axial fixation of the clamping element 10 ' is released.
  • the workpiece is then tensioned by a rotation of the spindles 9 on the individual vices 1, wherein the axial fixation of the spindles 9 is still solved.
  • the axial fixation of the spindles 9 is locked, whereby the workpiece is firmly clamped without mechanical over-determination occur.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Jigs For Machine Tools (AREA)
  • Clamps And Clips (AREA)
EP16701415.8A 2015-03-20 2016-01-22 Schraubstock Active EP3271112B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015003662.9A DE102015003662B3 (de) 2015-03-20 2015-03-20 Schraubstock
PCT/EP2016/000116 WO2016150536A1 (de) 2015-03-20 2016-01-22 Schraubstock

Publications (2)

Publication Number Publication Date
EP3271112A1 EP3271112A1 (de) 2018-01-24
EP3271112B1 true EP3271112B1 (de) 2019-08-21

Family

ID=55229645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16701415.8A Active EP3271112B1 (de) 2015-03-20 2016-01-22 Schraubstock

Country Status (8)

Country Link
US (1) US20180099382A1 (es)
EP (1) EP3271112B1 (es)
JP (1) JP6724002B2 (es)
KR (1) KR20180005154A (es)
CN (1) CN107206577B (es)
DE (1) DE102015003662B3 (es)
ES (1) ES2756582T3 (es)
WO (1) WO2016150536A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022116645A1 (de) 2022-07-04 2024-01-04 Ludwig Ehrhardt Gmbh Zentrumspanner

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107097040A (zh) * 2017-06-23 2017-08-29 安徽工业大学 一种轴类零件表面滚压装置
CN107914217A (zh) * 2017-10-23 2018-04-17 淮海工业集团有限公司 一种可防止活动钳口受力倾斜的平口钳
WO2019162963A1 (en) * 2018-02-23 2019-08-29 Chandratre Deepak Advanced vise jaws
US11045923B2 (en) 2018-09-06 2021-06-29 Muhammad Fareed Khan Suri Vice jaw assembly
DE102018122635C5 (de) 2018-09-17 2023-11-09 Ludwig Ehrhardt Gmbh Schraubstock
SI3685963T1 (sl) * 2019-01-28 2022-09-30 Oml Srl Vpenjalna naprava, zlasti primež
TWI692388B (zh) * 2019-05-10 2020-05-01 東佑達自動化科技股份有限公司 夾具裝置
CN111070116B (zh) * 2019-12-19 2021-12-21 大连德迈仕精密科技股份有限公司 精密仪器用快速可调节夹持装置
CN114473730B (zh) * 2022-01-17 2023-05-09 清华大学 用于夹持带沟槽零部件的夹具组件及夹持方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022116645A1 (de) 2022-07-04 2024-01-04 Ludwig Ehrhardt Gmbh Zentrumspanner
EP4302925A1 (de) 2022-07-04 2024-01-10 Ludwig Ehrhardt GmbH Zentrumspanner

Also Published As

Publication number Publication date
CN107206577A (zh) 2017-09-26
JP6724002B2 (ja) 2020-07-15
WO2016150536A1 (de) 2016-09-29
KR20180005154A (ko) 2018-01-15
US20180099382A1 (en) 2018-04-12
ES2756582T3 (es) 2020-04-27
JP2018512288A (ja) 2018-05-17
DE102015003662B3 (de) 2016-06-23
EP3271112A1 (de) 2018-01-24
CN107206577B (zh) 2019-09-24

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