US3779538A - Machinist vise - Google Patents

Machinist vise Download PDF

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Publication number
US3779538A
US3779538A US00189871A US3779538DA US3779538A US 3779538 A US3779538 A US 3779538A US 00189871 A US00189871 A US 00189871A US 3779538D A US3779538D A US 3779538DA US 3779538 A US3779538 A US 3779538A
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US
United States
Prior art keywords
sleeve
nut
axially
spindle
pin
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Expired - Lifetime
Application number
US00189871A
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English (en)
Inventor
G Rohm
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE2051119A external-priority patent/DE2051119B2/de
Application filed by Individual filed Critical Individual
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Publication of US3779538A publication Critical patent/US3779538A/en
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Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • a machinist vise has a-Sleeve threaded into a pp Oct. 23, 1970 Germany P70 39 210.8 and y g an extensible hydraulic P and-cylinder mechanism which in turn carries a vise [52] US. Cl 269/23, 269/24, 269/27 j gageable with another vise jaw carried on the 511 1m. (21....
  • a slip clutch is provided between the nutand the sleeve to couple the .two together rotationally until 2 gg t i the jaws engage the workpiece, and then decouple the 3:
  • a machinist vise often is provided with a clutch ar-- rangement that automatically switches between a highspeed low-mechanical-advantage mode of operation and a low-speed high-mechanical-advantage mode of operation once the workpiece is engaged between the vise jaws. This allows the workpiece to be very tightly clamped, while rapid travel is assured in opening and closing the jaws of the vise.
  • a small hydraulic piston-and-cylinder mechanism is provided as a link between a rotatable spindle threaded in a stationary support and the movable vise jaw.
  • This mechanism has a fluid chamber closed by a pair of pistons, one much larger than the other.
  • This larger piston is engaged by the threaded spindle and the smaller piston is connected via a force-transmitting rod to the displaceable vise jaw so that the vise jaws close rapidly, but once they contact the workpiece the smaller piston is operated creating a substantial mechanical advantage.
  • crank is rotationally connected to the two pistons which are concentric. Once some resistance has been met a slip clutch disconnects the larger piston from the spindle and the threaded spindle is effective .to drive the smaller piston home.
  • the crank in this arrangement also moves after switchover.
  • Another object is the provision of such a vise in which the crank remains stationary once the workpiece is engaged and the slow-advance mode of operation is effective.
  • Yet another object is the provision of a vise wherein the extent of high-mechanical-advantage clamping can be visually ascertained.
  • a further object is to provide a vise wherein the slowadvance mode of operation always takes place only after the fast-advance mode on closing of the vise, and is completed first on opening of the vise, so that the full length of travel of the displaceable jaw in the slowadvance mode is always at the disposal of the machinist, even when he only opens the vise slightly in order to reposition the workpiece.
  • a clamping device preferably a machinist vise, having a sleeve threadedlyreceived in a stationary support and axially displaceable toward a stationary jaw mounted on the support.
  • An axially ex-' pansible hydraulic piston-and-cylinder mechanism is provided on the sleeve and carries a displaceable vise jaw axially engageable with the stationary jaw.
  • a nut adapted to be rotated about the vise axis is axially entrained by thesleeve and is rotatable'relative thereto while a force-transmitting spindle which is nonrotatable relative to the sleeve is threaded at one end into the nut and has another end operatively connected to a small piston of the hydraulic mechanism.
  • a slip clutch is provided between the sleeve and the nut so that the nut rotates the sleeve and advances the displaceable jaw by means of the large piston until resistance is met, then it decouples them and turns on the spindle to advance the small piston and displace the movable jaw at greatly reduced speed but with a greatly
  • the spindle is formed with an axially elongated transverse hole through whicha pin extends. This p n is received at one end at least in an axial slot in the sleeve to rotationally couple the spindle and sleeve together.
  • the slip clutch is constituted by axially directed teeth formed on confronting surfaces of the nut and a ring or bushing which is rotationally coupled to the spindle and which is urged toward the nut by a spring or .the like.
  • the sleeve bears on the large piston through a spring or spring packet ofbelleville washers to maintain the chamber under pressure.
  • the outer end of the spindle is advantageously provided with a marking viewable through a port in the sleeve and comparable with indicia thereon to ascertain its position.
  • FIG. 1 is an axial section through the apparatus according to the present invention
  • FIG. 2 is a section taken along line II II of FIG. 1;
  • FIG. 3 is an elevational view illustrating a feature of the invention.
  • the machinist vise has a frame 1 screwed to a fixed mounting plate In here mounted in a vertical position but capable of being mounted horizontally, as on a drill press or the like.
  • a movable clamping assembly 2 is displaceable parallel to the plate 1a in the directions indicated by in-line arrows A and B to clamp a workpiece W between a fixed jaw 3 (held in place by screw 33) carried on the housing 1 and a movable jaw 4 carried on a steel slide 2a of the assembly 2.
  • the position of the slide 2a is determined by a pistonand-cylinder arrangement having a cylinder 5a formed in a cylinder member Sbolted to the slide 2a, with a drain screw 41) provided for emptying and refilling of the cylinder 5a (see my copending patent application, Ser. No. l90,035).
  • a piston 7 is slidable axially in the cylinder 5a and surrounds a piston 6 the piston 7 has an effective surface area equal to around twelve times that of the piston 6 to deplace hydraulic fluid F (here oil) in the cylinder 5a.
  • a gland 8 is provided to prevent leakage around and between the coaxial pistons 6 and 7.
  • a sleeve 10 is threaded through an arm 11 formed on the frame 1 and bears via springs 12, axially abutting caps 13 and 45, and springs 14a on the piston 7.
  • the springs 12 and 14a in the form of stacks of belleville washers, are arranged in annular recesses 12a and 14 in the sleeve 10 and between the piston 7 and the cylinder 5.
  • the slide 2a has an axial extension 15 formed with a bore 16 snugly receiving a cylindrical portion of the sleeve 10 between a shoulder 48 formed thereon and a snap ring 34 received therein, leaving a small amount of play P.
  • a rod 9 passes axially through the cap 13 and extends into the interior of the hollow sleeve 10, with its lower end bearing on the piston 6 and its upper end bearing on an end of a rod 17 axially slidable in the sleeve 10.
  • Another pin 18 engages the upper end 17a of the rod 17 and is axially couplable with another sleeve or nut 19 carried on the upper end of the sleeve 10.
  • the sleeve 10 and nut 19 are rotationally couplable through a torque coupling shown at 20.
  • the nut 19 is axially fixed relative to the sleeve 10 by a snap ring 22 on one side and a flange 21 on the other side.
  • the nut 19 threadedly engages a threaded region 23 of the pin 18 which is prevented from rotating relative to the sleeve 10 by means of a transverse pin 25 passing through a bore 30 in the lower end of the pin 18 and engaging in axial grooves 26 formed in the interior of the sleeve 10 (see FIG. 2). These grooves 26 have an axial length at least equal to the. axial travel of the piston 6.
  • the torque coupling 20 is formed by axially interengaging V-shaped teeth 29 formed on one end of the sleeve 19 and on the confronting surface of a ring or bushing 27 urged into contact with this sleeve 19 by a spring 28.
  • the bushing 27 is formed with a transverse bore 24 snugly receiving the pin 25 and coupling the spindle 18 to the sleeve 10 for joint rotation.
  • the teeth 29 will couple the sleeves l9 and 10 together through the intermediary of the pin 25 passing through the ring 27.
  • a crank 32 is fitted into a hexagonal socket 31 in the upper end of this sleeve 19.
  • the upper end of the rod 18 is formed with a circumferential groove 35 visible in relation to a scale 36 formed in a port in the upper end of sleeve 19 (see FIG. 3).
  • Axially displaceable relative to the upper part 39 of the sleeve 10 is-a ring 37 provided with a pin 38 engageable in axial bores 40 formed in this upper section 39.
  • a key 43 engageable in an axial slot in the ring 37 rotationally couples this ring 37 and the sleeve 19 while a spring-loaded pin 41 is engageable in a pair of axially spaced recesses 42 to retain the ring in an up or down position as described below.
  • a workpiece W is set between the open jaws 3 and 4 of the device and the crank 32 is rotated in one direction. Rotation of this crank 32 is transmitted by the teeth 29 to the ring 27 and therethrough to the pin 25 which rotates the sleeve 10 relative to its support arm 1 1, thereby advancing this sleeve 10 in the direction A. Since the sleeve 10 bears through springs 12a and 14a and members 13 and 45 on the piston 7, this piston will build up pressure in the cylinder 5a to displace the ja 4 in direction A also.
  • crank 32 Since the effective surface area of piston 6 is only a fraction of that of the piston 7 and since the I pitch of the threads on section 23 is much smaller than that of the threads between the sleeve 10 and the arm 11, the crank 32 is thereby effective with a greatly increased mechanical advantage to clamp the workpiece W between the jaws 3 and 4.
  • the teeth 29 only slip for a very brief time since after only one or two turns of the crank 32 the pin 18 pulls the ring 27 completely out of engagement with the teeth 29 on the sleeve 19.
  • the operator can observe on the scale 36 just how far the pin 18 has moved, which displacement is of course indicative of how tightly the workpiece is clamped.
  • the hole 30 is axially elongated to permit disengagement of the teeth upon the development of a predetermined torque.
  • springs 12a and 14a insure that any minor leaks of fluid F are taken up without releasing the workpiece.
  • the ring 37 can be pushed down so that its pin 38 engages in one of the bores 40 to couple the sleeves l9 and rotationally, thereby making the forcible withdrawal of the jaw 4 possible.
  • This auxiliary rotational coupling is also useful on excessively resilient objects which must be tightly clamped.
  • the machinist vise described above allows a workpiece to be clamped tightly with great ease.
  • the worker need merely rotate the crank to first advance the jaw 4 at a fast-advance speed with a small mechanical advance and, once the workpiece W is engaged on both sides, the vise automatically and instantaneously switches over to a slow rate of advance with a very great mechani-cal advantage.
  • the slow-advance screw will always be wound fully back automatically at the end of each operation so that the machinist need never worry whether or not he only disposes of part of the effectiveness of this element.
  • a clamping device comprising:
  • a displaceable jaw carried on said mechanism and axially shiftable toward said stationary jaw;
  • a tubular nut axially coupled with said sleeve and rotatable relative-thereto, said nut extending coaxially into said sleeve a force-transmitting spindle having one end operatively engageable with said small piston and another end axially threadedly received in said tubular nut at a portion thereof within said sleeve said spindle being nonrotatable relative to said sleeve;
  • said clutch comprises a ring engaging said nut and rotationally entrained by said spindle, said ring and said nut having confronting and engaging surfaces formed with interengaging -teeth, said clutch further comprising spring means for urging said ring resiliently into engagement with said nut.
  • said means for coupling includes a ring axially displaceable and r0- tationally fixed on said sleeve and engageable with said nut, said ring and said nut being provided with mutually interengageable interfitting axially extending formations, whereby axial displacement of said ring toward said nut engages said formations together and rotationally couples said spindle and said nut.
  • a clamping device comprising:
  • an axially expansible hydraulic piston-and-cylinder mechanism carried on said sleeve and having a largepiston and a small piston, said sleeve bearing on said large piston;
  • a displaceable jaw carried on said mechanism and axially engageable with said stationary jaw
  • a force-transmitting spindle having one end operatively engageable with said small piston and another end axially threadedly received in said nut, said spindle being nonrotatable relative to said sleeve;
  • a slip clutch rotationally coupling said sleeve to said nut and decoupling same after development of a predetermined amount of torque therebetween;
  • said sleeve being formed with at least one axially extending slot receiving an end of said pin, said spindle being formed with a throughgoing transverse hole receiving said pin, whereby said pin rotationally couples said spindle to said sleeve
  • said .clutch comprising a ring engaging said nut and rotationally entrained by said spindle, said ring and said nut having confronting and engaging surfaces formed with interengaging teeth, said clutch including spring means for urging said ring resiliently into engagement with said nut, said ring being formed with a throughgoing transverse hole receiving said pin, at least one of said holes being sufficiently axially elongated to permit disengagement of said teeth on development of said predetermined amount of torque.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
US00189871A 1970-10-17 1971-10-18 Machinist vise Expired - Lifetime US3779538A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2051119A DE2051119B2 (de) 1970-10-17 1970-10-17 Spanneinrichtung, insbesondere Maschinenschraubstock
DE7039210 1970-10-23

Publications (1)

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US3779538A true US3779538A (en) 1973-12-18

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ID=25759919

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US00189871A Expired - Lifetime US3779538A (en) 1970-10-17 1971-10-18 Machinist vise

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US (1) US3779538A (enExample)
FR (1) FR2112306B1 (enExample)
GB (1) GB1306758A (enExample)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5683077A (en) * 1996-05-10 1997-11-04 Fink; Paul David Vise handle with torque control
US20050034556A1 (en) * 2003-08-11 2005-02-17 Kelley Pate Manual Handle Apparatus
US20090255098A1 (en) * 2008-04-11 2009-10-15 John William Andberg Clamp with a non-linear biasing member
CN101003127B (zh) * 2006-01-16 2011-03-16 津田驹工业株式会社 带增力装置的虎头钳
TWI549782B (zh) * 2013-04-26 2016-09-21 林澤培 虎鉗調壓裝置
TWI594846B (zh) * 2016-07-22 2017-08-11 林長毅 虎鉗調壓裝置
CN107914218A (zh) * 2017-12-13 2018-04-17 陕西宝成航空仪表有限责任公司 多功能组合平行夹持装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE594C (de) * 1877-08-07 A. Rassmann in Ilmenau Nufsknacker
US278094A (en) * 1883-05-22 Micro meter-gage
GB563735A (en) * 1943-04-23 1944-08-28 William Charles Pallant Improvements in vices
DE894948C (de) * 1951-09-18 1953-10-29 Licentia Gmbh Spannvorrichtung, insbesondere zum Einspannen der zu schweissenden Werkstuecke bei Stumpfschweissmaschinen
US2803157A (en) * 1952-07-30 1957-08-20 Seitter Karl Holding device having screw and hydraulic pressure-applying means sequentially exerted
US3147002A (en) * 1960-11-23 1964-09-01 Arnold Franz Mechanical-hydraulic fastening device
US3400924A (en) * 1964-04-07 1968-09-10 Arnold Franz Clamping device
US3484094A (en) * 1967-02-09 1969-12-16 Franz Arnold Clamping device having an operating screw portion
US3650522A (en) * 1968-12-03 1972-03-21 Gressel Ag Mechanical clamping device, in particular machine vice

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US278094A (en) * 1883-05-22 Micro meter-gage
DE594C (de) * 1877-08-07 A. Rassmann in Ilmenau Nufsknacker
GB563735A (en) * 1943-04-23 1944-08-28 William Charles Pallant Improvements in vices
DE894948C (de) * 1951-09-18 1953-10-29 Licentia Gmbh Spannvorrichtung, insbesondere zum Einspannen der zu schweissenden Werkstuecke bei Stumpfschweissmaschinen
US2803157A (en) * 1952-07-30 1957-08-20 Seitter Karl Holding device having screw and hydraulic pressure-applying means sequentially exerted
US3147002A (en) * 1960-11-23 1964-09-01 Arnold Franz Mechanical-hydraulic fastening device
US3400924A (en) * 1964-04-07 1968-09-10 Arnold Franz Clamping device
US3484094A (en) * 1967-02-09 1969-12-16 Franz Arnold Clamping device having an operating screw portion
US3650522A (en) * 1968-12-03 1972-03-21 Gressel Ag Mechanical clamping device, in particular machine vice

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5683077A (en) * 1996-05-10 1997-11-04 Fink; Paul David Vise handle with torque control
US20050034556A1 (en) * 2003-08-11 2005-02-17 Kelley Pate Manual Handle Apparatus
CN101003127B (zh) * 2006-01-16 2011-03-16 津田驹工业株式会社 带增力装置的虎头钳
US20090255098A1 (en) * 2008-04-11 2009-10-15 John William Andberg Clamp with a non-linear biasing member
CN102124353A (zh) * 2008-04-11 2011-07-13 惠瑞捷（新加坡）私人有限公司 具有非线性施力构件的夹持件
TWI549782B (zh) * 2013-04-26 2016-09-21 林澤培 虎鉗調壓裝置
TWI594846B (zh) * 2016-07-22 2017-08-11 林長毅 虎鉗調壓裝置
CN107914218A (zh) * 2017-12-13 2018-04-17 陕西宝成航空仪表有限责任公司 多功能组合平行夹持装置
CN107914218B (zh) * 2017-12-13 2019-05-10 陕西宝成航空仪表有限责任公司 多功能组合平行夹持装置

Also Published As

Publication number Publication date
FR2112306B1 (enExample) 1974-03-29
FR2112306A1 (enExample) 1972-06-16
GB1306758A (en) 1973-02-14

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