US3400924A - Clamping device - Google Patents

Clamping device Download PDF

Info

Publication number
US3400924A
US3400924A US445922A US44592265A US3400924A US 3400924 A US3400924 A US 3400924A US 445922 A US445922 A US 445922A US 44592265 A US44592265 A US 44592265A US 3400924 A US3400924 A US 3400924A
Authority
US
United States
Prior art keywords
toggle
abutment
spindle
slide
clamping
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.)
Expired - Lifetime
Application number
US445922A
Other languages
English (en)
Inventor
Arnold Franz
Wermuth Charles
Wagner Heinz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3400924A publication Critical patent/US3400924A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B25B1/14—Arrangements for positively actuating jaws using toggle links

Definitions

  • the mov- ⁇ able jaw is moved into engagement with the workpiece by simultaneous rotation of the handcrank and the spindle.
  • the overload clutch releases whereby further rotation of the ⁇ handcrank causes a pushrod coaxially mounted within the spindle to axially extend.
  • the pushrod has a pressure member mounted on the end thereof, which member coacts with a pair of toggle mechanisms so as. to exert a high clamping pressure onto the movable jaw.
  • Each toggle mechanism comprises a pair of links and three cylindrical pressure rollers, each of the links being provided with partial cylindrical recesses on opposite ends thereof for receiving the pressure members therein.
  • the links and the rollers have a large axial length whereby large bearing areas are provided between the respective members of the toggle mechanism to permit transfer therethrough oflarge clamping pressures.
  • the toggle mechanismsl are mounted within a U-shaped frame member comprising the movable jaw whereby the jaw member can withstand the large clamping pressures applied thereto.
  • This invention relates to a clamping device for achieving high clamping pressures. More particularly, the present invention relates to a clamping device which is adapted to chuck workpieces and which can be usedas a machine vise. i
  • the present invention relates to a clamping device wherein ,two opposite pairs of toggle means are arranged between an abutment and a slide which carries the clamping jaw, while a movable pressure element for forcing the two pairs of toggle means apart and hence for stretching said pairs is provided between said pairs.
  • the pairs of toggle means consist of laminar members, while all toggle links are formed in a usual manner Aby hinge bolts extending through said laminar members. Since only relatively small pressures can be ⁇ achieved by toggle means of this type, this known structure is ⁇ unsuited for machine vises wherein clamping pressures of at least 4 tons must be achieved. Besides, saidpreviously known toggle means are subject to considerable wear.
  • the problem underlying the present invention is to provide a clampingdevice provided with pairs of toggle means by which it is possible to achieve very highclamping pressures and which are virtually not subject to wear.
  • the toggle lever system shall have a simple structure and it shall be easy to manufacture; in particular, it shall be of small dimension so as to occupy a minimum of space in a machine vise or the like.
  • each pair of toggle means ⁇ embodying the present invention consists of three press rollers and two support levers which 3,400,924 Patented sept. 1o, 196s ICC are positioned between said rollers and which are supported on said rollers by partial cylindrical bearing surfaces of said levers. Furthermore, substantially semicylindrical recesses which receive said two rollers are provided in said slide and in said abutment. Since these elements of the pairs of toggle means are very compact and sturdy and since they have very large pressure surfaces, it is possible to achieve very high clamping pressures by such pairs of toggle means. All components of these pairs of toggle means as well as the pressure element are made advantageously of hardened steel so thatalso in view of the presence of large pressure surfaces-any wear is practically out of the question.
  • the pairs of toggle means in this novel structure can be disposed in as small spaces as possibile and they can be advantageously mounted for free displacement between two horizontal parallel bearing plates which are integral with said abutment and which together forma U-prole piece.
  • FIG. 1 is a side elevation of a machine vise
  • FIG. 2 is the corresponding top plan view partially in section taken along line II-II of FIG. l;
  • FIG. 3 is a diagrammatic illustration of the slide of said screw vise including the toggle lever system with parts broken away;
  • FIG. 4 is an enlarged section of one component of the system of FIG. 2.
  • 1 represents the substructure of a machine vise
  • 2 represents the immovable clamping jaw
  • 3 represents the movable clamping jaw secured to a slide 4.
  • a spindle nut 5 which is secured to the structure 1 by means of a bolt 6 inserted therethrough and which can be arranged in different positions on the substructure 1 in order to achieve diterent stretch widths a.
  • a hollow quick acting spindle 7 which can be rotated by a crank handle 8 and which is connected to an abutment 9 is screwable in said spindle nut 5.
  • each pair of toggle means comprises three cylindrical press rollers v11, 12 and 13 and two support levers 15, 16 which are positioned between said rollers and which are supported on said rollers by partial cylindrical bearing surfaces 14 on said levers.
  • the roller 12 constitutes an intermediate cylindrical roller member of the toggle linkage, while the other two rollers 11 and 13 constitute end partial cylindrical bearing members. Substantially semi-cylindrical recesses which receive the rollers 11i and 13 are provided in said slide 4 and in said abutment 9.
  • the support levers have a thickness s which is approximately equal to the diameter d of the press rollers.
  • rollers 11-13 and the support levers 15, 16 are formed relatively large, nearly semi-cylindrical pressure surfaces 14 extending over the width h.
  • This permits the achievement of very high pressing forces by the pairs of toggle means, between which there is arranged a pressure element 18 which is secured to the offset end 10a of the pushrod 10 by means of a pin 19.
  • All members 11-13, 15, 16 of the pairs of toggle linkages as well as the pressure member 18 are advantageously made of hardened steel in a distortionless manner due to the simple, compact structure of these members.
  • This arrangement has the advantage that the pairs of toggle linkages are always in uniform engagement with the pressure element and that, respectively, the pressure element can freely adjust itself when said element is displaced in the direction A so that invariably equally great forces are created between said element and the two pairs of toggle linkages.
  • said pressure element is mounted for free movement in the direction B, it is possible to avoid any one-sided, unequal forces which would otherwise come into being due to unavoidable dissimilar manufacture and arrangement of both pairs of toggle linkages if said pressure element is immovably mounted.
  • said pressure element 18 can either act indirectly upon the pairs of toggle linkages or, advantageously, directly upon the press rollers 12.
  • Said pressure element 18 has convex pressure surfaces 18a Which are suitably cylindrically shaped. Due to said con- Vex cylindrical pressure surfaces cooperating with the rollers 12, it is pos-sible to achieve the force required for displacing the pressure element 18 when the latter is displaced in the direction A-and hence also the torque to be exerted by the crank handle S--which force remains nearly unchanged despite the increasing toggle lever pressure.
  • the press rollers 11-13, the support levers 15, 16 and the pressure element 18 have the same height h, and all of these elements are mounted for free movement between two parallel, horizontal bearing plates 22 and 23.
  • These two bearing plates 22 and 23 are advantageously formed integral with the abutment 9 and together form a U-prole piece.
  • the legs of this U-profile piece constitute the two bearing plates 22, 23 for the pairs of toggle linkages and the pressure element 18, while the web or ridge of this U-prole piece constitutes the abutment 9.
  • This abutment is subjected to considerable bending stress due to the very high pressure forces exerted by the pairs of toggle linkages. Yet deflection or bending of said abutment 9 is prevented by the long legs 22, 23 of said U-prole piece.
  • a stop 24 which is rotatable about a vertical axis and which has two (or more) vertical stop faces at 25 for the push rod end 10a.
  • the clamping device and in particular the ⁇ toggle linkage system is represented in the released or expanded condition where a spacing b exists between the end 10a and the set stop face 25 so that the push rod 10 can only be moved a distance b in the direction A.
  • the stop faces 25, 26 permit selection of different clamping pressures.
  • the upper side of slide 4 includes an indicating scale 27 for adjusting the clamping pressure, Isaid scale being concentrically disposed relative to the rotatable stop 24.
  • a detent device ball catch 28, compression spring 29 for arresting the stop 24 in various stop positions is provided between theA slide 4 and the rotatable stop 24.
  • FIG. 2 shows stops 35 for the abutment 9, which are for limiting the displacement of said abutment in the slide 4 iu the clamping direction A.
  • compression springs 36 are arranged between said stops and the abutment.
  • these springs 36 which are formed as cup or disk springs are arranged on bolts 37 which are located in the abutment 9 and engage with the stops 35.
  • the cup springs 36 are effective to constantly urge the abutment 9 in the direction A, in consequence of which the pairs of toggle linkages subjected to this pressure remain movable for free play and are constantly pressed with the rollers 12 against the pressure element 18.
  • the quick acting spindle 7 is rotatably mounted at 38 with one end thereof on the abutment 9.
  • a compression spring 39 which has one end thereof bearing against the spindle at 40, and has the other end thereof bearing against the push rod 10 at 41. Under the'force of this spring, the spindle end 38 is pressed against one side of the abutment 9, while the transverse face 42 of the pressure element 18 is pressed against the other side of the abutment 9.
  • a driving spindle 43 is provided which is rotatable by the crank handle 8 and the end 43a of which is rotatably mounted on the push rod 10.
  • This driving spindle 43 is screwable in a nut 44 which is securely connected to the hollow spindle 7 by means of, e.g., pins 45.
  • a torque coupling or clutch is provided between the nut 44 and the driving spindle 43.
  • the torque coupling can consist of a coupling member 46 which is slidable on but rotatable with the spindle end 43a and which has wedgelike ribs 48 which engage in corresponding depressions in the nut 44 under the pressure of the cup springs 47.
  • the driving spindle 43 can be securely connected to a sleeve 49 rotatably mounted on the hollow spindle 7 so that the driving spindle 43 can be rotated not only by the crank handle 8 but also manually by means of the sleeve 49.
  • the end 43a of the driving spindle is advantageously supported by means of a bearing ball 50 and an axial ball bearing 51 on the end 52 of tht push rod 10, while also a bearing plate 53 is interposed between the ball 50- and the bearing 51.
  • the vmode of operation of this drive is as follows:
  • the nut 44 and hence the hollow spindle 7 are rotated by the driving spindle-43 via-the coupling 46-48. Due to thethreaded connection between the spindle 7 and the xednut 5, the hollow spindle 7, the abutment 9, the pairs of toggle linkages and the slide 4 (in the condition of the individual members as shown in FIG. 2) are moved in the ⁇ direction A whereby the jaw 3 comes into engagement with the workpiece. In this position, spindle 7 is restrained from further axial movement. Thus, upon further rotation of the crank handle 8, the coupling member 46 will be released whereby the spindle 43 will be movedin the direction A relative to the nut 44. As a result, the push rod 10 will be moved in the direction A so that the pairs 15, 16 of toggle levers will be forced apart by the pressure element 18 causing a small displacement of the slide 4 in the direction A so that the clamping pressure will be considerably increased.
  • the present invention is not limited to the illustrative embodiment of a machine vise as is described and represente-d herein but is applicable to clamping devices of all types.
  • a clamping device for exerting high clamping pressures on a workpiece, said device comprising:
  • drive means connected to one of said clamping members for movement relative to the other said clamping member, said drive members comprising an abutment member and a slide, toggle means interconnecting said abutment member and said slide for causing said relative movement, said slide being iixedly connected to said one clamping member;
  • said toggle means comprising a pair of toggle mechanisms, each of which comprises a pair of links having partial cylindrical recesses in each end thereof, a first partial cylindrical bearing member being received in the recess in one end of one of said links and being connected to said abutment member, a second partial cylindrical bearing member being received in the recess in one end of the other of said links 'and further being connected to said slide, a substantially cylindrical roller member being received inthe recesses at the other ends of said pair of links, said pair of links and said first and second partial cylindrical bearing members and said cylindrical roller member all being of substantially the same width;
  • said drive means further including a movable pressure element ⁇ having convex pressure surfaces thereon, said pressure surfaces being adapted to contact and actuate each of said toggle mechanisms;
  • toggle mechanisms are mounted for free displacement between said parallel bearing plates and are capable of transmitting large clamping forces therethrough.
  • a clamping device wherein said abutment member has an opening therethrough, and said drive means further includes a pushrod extending through said opening and having said pressure element tixedly connected to the end thereof, means mounting said pushrod for free movement relative to said abutment member in a direction substantially transverse to the longitudinal axis of said pushrod.
  • a clamping device according to claim 1, wherein said parallel bearing plates are integrally connected to said abutment member so as to form a generally U-shaped member.
  • a clamping device according to claim' 3,l wherein one of said bearing plates is mounted in slideable engagement with said slide and the other bearing plate is mounted in slideable engagement with said frame means, said U-shaped member being movable relative to said frame means and said slide in the same longitudinal direction as said slide.
  • a clamping device wherein a rotatable stop means is mounted on said slide for permitting adjustment of the clamping pressure, said stop means having a plurality of stop faces thereon, one of said faces being adapted to coact with said pressure member for limiting the movement thereof.
  • a clamping device according to claim S, wherein springdetent means are positioned between said slide and said stop means for releasably holding said stop means in a selected position.
  • a clamping device wherein a scale is provided on the upper side of said slide in con- Centric relationship to said rotatable stop means for providing a visual indication of the selected clamping pressure.
  • a clamping device according to claim 1, wherein a nut is ltixedly connected to said frame means, and said drive means further includes a hollow spindle threadedly received in said nut and having a pushrod positioned within said spindle, said abutment member havingan opening therein, said pushrod having an end thereof extending through said opening and having said pressure element iixedly secured thereto, spring means coacting between said spindle and said pushrod for urging one end of said spindle into engagement with one side of said abutment member, said one end of said spindle being rotatably mounted on said abutment member, said spring means also urging said pushrod and the pressure element Imounted thereon against the other side of said abutment member.
  • said drive means further includes rotatable crank means having a driving spindle xedly secured thereto, said driving spindle having an end thereof aligned with and rotatably supported on the pushrod, a coupling member securely connected to said hollow spindle, and releasable clutch means interconnecting said driving spindle and said coupling member.
  • a clamping device according to claim 9, wherein said driving spindle is threadedly connected to said coupling member and is supported on the pushrod by means of antifriction bearings.
  • a clamping device wherein said rst and second partial cylindrical bearing members are each cylindrical roller members and said abutment member and said slide are each provided with partial cylindrical recesses therein for receiving said cylindrical roller members.
  • a clamping device for applying a clamping force to a workpiece, said device comprising:
  • slide means mounted on said frame means for linear movement relative thereto, said slide means including a clamp jaw tixedly secured thereto and movable toward and away from said iixed clamp jaw;
  • abutment means mounted on said frame means for slideable linear movement with resp-ect to said frame means and said slide means, said abutment means being movable in a direction substantially parallel to said slide means;
  • toggle means comprising a pair of toggle mechanisms connecting said slide means and said abutment means, actuation of said toggle mechanisms causing relative movement between said slide means and said abutment means;
  • crank means for actuating said rotatable driven means whereby said abutment means and said slide means are simultaneously moved relative to said frame means;
  • reciprocalV driven means operatively connected to said crank means and driveable thereby when said clutch means is released, said reciprocal driven means bev ing adapted to engage and actuate said toggle mechamsm;
  • crank means actuation of said crank means causes said abutment means and said slide means to move relative to said xed jaw until said movable jaw contacts the workpiece causing said clutch means to release, said crank means then linearly moving said reciprocal driven means to actuate said toggle mechanism f for causing the application of a large clamping pressure to the workpiece by moving the movable jaw relative to the abutment means.
  • a clamping device wherein said rotatable driven means includes a hollow spindle and said reciprocal driven means includes a pushrod freely mounted within saidhollow spindle, a pressure element being mounted on one end of said pushrod and being adapted to engage said pair of toggle mechanisms.
  • said rotatable driven means includes a hollow spindle having a portion thereof threadedly received in said frame means with one end of said spindle bearing against and being rotatably supported on said abutment means, and resilient means urging said hollow spindle into engagement with said abutment means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
US445922A 1964-04-07 1965-04-06 Clamping device Expired - Lifetime US3400924A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA45689A DE1284366B (de) 1964-04-07 1964-04-07 Spannvorrichtung

Publications (1)

Publication Number Publication Date
US3400924A true US3400924A (en) 1968-09-10

Family

ID=6934847

Family Applications (1)

Application Number Title Priority Date Filing Date
US445922A Expired - Lifetime US3400924A (en) 1964-04-07 1965-04-06 Clamping device

Country Status (5)

Country Link
US (1) US3400924A (de)
CH (1) CH424674A (de)
DE (1) DE1284366B (de)
GB (1) GB1096459A (de)
NL (1) NL6504435A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650522A (en) * 1968-12-03 1972-03-21 Gressel Ag Mechanical clamping device, in particular machine vice
US3779538A (en) * 1970-10-17 1973-12-18 Roehm Guenter H Machinist vise
US3807721A (en) * 1970-12-10 1974-04-30 F Arnold Mechanical clamping device
US3902707A (en) * 1972-12-20 1975-09-02 Saurer Allma Gmbh Drive spindle for a vise
US5171004A (en) * 1990-06-07 1992-12-15 Gressel Ag Clamping device with force amplifier, especially machine vise
US5707053A (en) * 1996-08-12 1998-01-13 Huck International, Inc. Blind alignment and clamp up tool
US6345567B1 (en) * 1998-10-06 2002-02-12 The Whitaker Corporation Power enhancing unit for a linear power module
US20150343606A1 (en) * 2015-08-11 2015-12-03 Hsi-Shui Lin Vise
CN112589477A (zh) * 2020-12-16 2021-04-02 上海鼎亚精密机械设备有限公司 一种便于上料的线轨加工中心

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2710424A1 (de) * 1977-03-10 1978-09-14 Roehm Guenter H Spanneinrichtung, insbesondere maschinenschraubstock
DE2913506A1 (de) * 1979-04-04 1980-10-16 Amsted Siemag Kette Gmbh Kraftverstaerker
DE3625753A1 (de) * 1986-07-30 1988-02-04 Festo Kg Spannvorrichtung
EP0418197B1 (de) * 1989-09-13 1993-06-16 Gremolith Ag Kniehebelkraftverstärker
AU659467B2 (en) * 1991-08-06 1995-05-18 La-Z-Boy Incorporated Reclining sofa
TWI564117B (zh) * 2015-07-03 2017-01-01 Improved structure of double force vise

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE16179C (de) * F. BLÜTHGEN in Wittenberg (Prov. Sachsen) Lenkvorrichtung an Strafsenfuhrwerken
US2803157A (en) * 1952-07-30 1957-08-20 Seitter Karl Holding device having screw and hydraulic pressure-applying means sequentially exerted
US2979975A (en) * 1958-10-20 1961-04-18 Bliss E W Co Knuckle joint press

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE926400C (de) * 1953-05-22 1955-04-18 Willi Seikel Gewindespindel
GB779153A (en) * 1954-04-07 1957-07-17 Albert Charles Trow Improvements in or relating to vices and other screw-operated mechanisms
DE1738596U (de) * 1954-08-16 1957-01-24 Christian Calmbach Schraubstock.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE16179C (de) * F. BLÜTHGEN in Wittenberg (Prov. Sachsen) Lenkvorrichtung an Strafsenfuhrwerken
US2803157A (en) * 1952-07-30 1957-08-20 Seitter Karl Holding device having screw and hydraulic pressure-applying means sequentially exerted
US2979975A (en) * 1958-10-20 1961-04-18 Bliss E W Co Knuckle joint press

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650522A (en) * 1968-12-03 1972-03-21 Gressel Ag Mechanical clamping device, in particular machine vice
US3779538A (en) * 1970-10-17 1973-12-18 Roehm Guenter H Machinist vise
US3807721A (en) * 1970-12-10 1974-04-30 F Arnold Mechanical clamping device
US3902707A (en) * 1972-12-20 1975-09-02 Saurer Allma Gmbh Drive spindle for a vise
US5171004A (en) * 1990-06-07 1992-12-15 Gressel Ag Clamping device with force amplifier, especially machine vise
US5707053A (en) * 1996-08-12 1998-01-13 Huck International, Inc. Blind alignment and clamp up tool
US6345567B1 (en) * 1998-10-06 2002-02-12 The Whitaker Corporation Power enhancing unit for a linear power module
US20150343606A1 (en) * 2015-08-11 2015-12-03 Hsi-Shui Lin Vise
US9808913B2 (en) * 2015-08-11 2017-11-07 Hsi-Shui Lin Vise
CN112589477A (zh) * 2020-12-16 2021-04-02 上海鼎亚精密机械设备有限公司 一种便于上料的线轨加工中心

Also Published As

Publication number Publication date
GB1096459A (en) 1967-12-29
NL6504435A (de) 1965-10-08
CH424674A (de) 1966-11-15
DE1284366B (de) 1968-11-28

Similar Documents

Publication Publication Date Title
US3400924A (en) Clamping device
DE4031746C2 (de)
US3427016A (en) Ratchet clamp vernier
DE2308175B2 (de) Kniehebelkraftverstärker
US3650522A (en) Mechanical clamping device, in particular machine vice
US3968869A (en) Pallet locating and clamping arrangement
US2855964A (en) Quick-acting clamp
US631991A (en) Vise.
US3847381A (en) Pneumatic vise with high clamping force
US2954713A (en) Vise
DE499040C (de) Maschinen-Parallelschraubstock mit niederziehenden Spannbacken
US3044314A (en) Control mechanism
US4194406A (en) Lever mechanism
US2465679A (en) Slidable vise jaw locked and actuated by system of levers
US2985960A (en) Nut-splitting tools
US2890613A (en) Locking adjustable handle for hand tools
US72921A (en) Peter shelletfbock
DE3925718A1 (de) Schraubstock zum zentrischen spannen
US1302834A (en) Wrench.
US625193A (en) Clamping device for glue presses
DE478156C (de) Innenbackenbremse fuer Kraftfahrzeuge
US320797A (en) Hieam t
DE74050C (de) Vorrichtung an Spindel-Pressen zum selbstthätigen Ein- und Ausrücken des Antriebes bei Ueberschreitung des Prefsdruckes
DE933909C (de) Lamellen-Reibungskupplung fuer Pressen, Scheren und aehnliche Maschinen
DE424327C (de) Reibungskupplung fuer Reihenantrieb