GB2130932A - Vice or like clamping device - Google Patents
Vice or like clamping device Download PDFInfo
- Publication number
- GB2130932A GB2130932A GB08330216A GB8330216A GB2130932A GB 2130932 A GB2130932 A GB 2130932A GB 08330216 A GB08330216 A GB 08330216A GB 8330216 A GB8330216 A GB 8330216A GB 2130932 A GB2130932 A GB 2130932A
- Authority
- GB
- United Kingdom
- Prior art keywords
- guide
- vice
- base portion
- locking member
- guide base
- 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.)
- Granted
Links
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
- B25B1/12—Arrangements for positively actuating jaws using screws with provision for disengagement
- B25B1/125—Arrangements for positively actuating jaws using screws with provision for disengagement with one screw perpendicular to the jaw faces
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Jigs For Machine Tools (AREA)
Abstract
In a vice having jaws 2, 3 adjustment is provided for a guide base portion 9 carrying a nut 8 through which passes a screwthreaded spindle 5 for adjusting jaw 2 relatively to fixed jaw 3. The base portion 9 is fixed in adjusted position on the vice bottom 1 by a reciprocable locking member 13 having teeth 13.1 that engage rack teeth 12.1 on portion 9 when positioned in the selected location. The locking member 13 is advanced to and withdrawn from the portion 9 by a lever operated eccentric. <IMAGE>
Description
SPECIFICATION
Vice or like clamping device
The invention relates to a vice or the like clamping device, in particular a machine screw vice, comprising two clamping jaws of which at least one is movable and is adjustable by a screwthreaded spindle which is mounted in a spindle nut which is displaceable in the direction of adjustment of the movable clamping jaw, with a guide base portion in a guide means, formed by guide grooves and guide bar portions laterally engaging therein, in a vice bottom portion which carries the other clamping jaw, and comprising a means for fixing the guide base portion in its guide means in the vice bottom portion.
Screw vices of that kind are known and have the advantage that, by virtue of the high degree of precision with which the guide base portion, which is comparatively long in the direction of the guide means, is guided in the bottom portion of the vice, it is possible to achieve a correspondingly high degree of clamping precision in regard to clamping the workpiece which is to be held between the two clamping jaws. The fact that the guide base portion is displaceable in the bottom portion of the screw vice that it is possible for the clamping distance required between the two clamping jaws to be coarsely preset quickly; however, the means which is provided for fixing the guide base portion in its guide means in the bottom portion of the vice permits the guide base portion to be fixed in only a smali number of positions, in most cases only three positions, lengthwise of the guide means.More particularly, in the known vices, the fixing means comprises holes which extend in the bottom portion of the vice, in a direction transverse with respect to the direction of the guide means, for insertion of a locking pin therein, and at least one corresponding hole which is provided in the guide base portion and into which the locking pin fits and locks the guide base portion when the guide base portion is in a position in which the hole therein is disposed coaxially opposite to one of the holes in the bottom portion of the vice.In such an arrangement, the locking pin can either be transferred between the various holes in the bottom portion of the vice, or each of those holes may fixedly carry its own locking pin which is urged by a spring force against the guide base portion and engages into the hole therein when, during movement of the guide base portion, the hole thereof passes the pin. The small number of possible locking positions for the guide base portion, which can be achieved in that way, can be explained by virtue of the fact that each locking position at least requires its own hole in the bottom portion of the vice, but an excessive number of such holes has an excessively detrimental effect on the strength and rigidity of the bottom portion of the vice, and accordingly also the accuracy with which a workpiece can be clamped in the vice.This distance between the locking positions is therefore comparatively great and has to be bridged by suitably turning the screwthreaded swindle in the spindle nut, which can involve a considerable amount of time, particularly when the clamping distance between the clamping jaws has to be more frequently adjusted between two widely spaced values.
The invention is based on the problem of so designing a screw vice of the kind set forth in the opening part of this specification, that it is possible for the guide base portion to be fixed, throughout the range of movement thereof, in closely successive positions, without the means provided for that purpose weakening the strength of the bottom portion of the screw vice.
According to the invention, that problem is solved in that the means for fixing the guide base portion comprises a toothed rack on the guide base portion, which extends in the guide direction thereof over the length of its range of displacement, and has teeth extending transversely to said direction, and a locking member which is disposed in the bottom portion of the vice immovably in the guide direction of the guide base portion and which is guided displaceably with respect to the toothed rack and wh-ich is provided with a locking head which carries a co-operating tooth arrangement fitting into the tooth arrangement of the toothed rack and which, in the condition of engagement of the tooth arrangements, locks the guide base portion to prevent movement thereof.
Accordingly, with one and the same locking member, the guide base portion can be fixed in a plurality of positions which only differ by the spacing of the teeth of the tooth arrangements, which are associated with each other, on the toothed rack and on the locking head. The single locking member can readily be arranged in the bottom portion of the vice in such a way that the bottom portion of the vice does not experience any reduction in its strength and rigidity, which would have a detrimental effect on the clamping function of the vice.
The locking member may be arranged laterally in the bottom portion of the vice and may be displaceable substantially horizontally with respect to the toothed rack which is provided on one of the guide bar portions. In a preferred embodiment of the invention, very accurate symmetrical and therefore particularly precise loading conditions may be achieved by virtue of the fact that the guide bar portions are arranged laterally on the guide base portion and the guide grooves are arranged on the side walls of a guide recess which is provided in the bottom portion of the vice for the guide base portion, with the guide bar portions and the respective guide grooves being disposed opposite to each other and positively engaging into each other, that the toothed rack is disposed on the underside of the guide base portion centrally between the guide bar portions, and that the locking member is a pin of circular cross-section, which is guided perpendicularly in the bottom of the guide recess, an actuating means being provided for adjusting the pin from the exterior. Desirably, the actuating means is formed from a shaft portion which is mounted in the bottom portion of the vice rotatably by means of a hand lever about an axis which is perpendicular to the axis of the pin forming the locking member, and which is provided at its end towards the locking member with an eccentric pin portion which engages into a groove in the locking member, the groove extending transversely with respect to the direction of movement of the locking member.
Accordingly, the locking member is positively displaced by the eccentric pin portion and is additionally prevented from rotating. In addition, it is desirable for the shaft portion to be secured so as to be axially immovable, so that the eccentric pin portion cannot slip out of the groove accommodating same in the locking member or out of its mounting in the bottom portion of the vice.In addition, in accordance with a further proposai applicable to the present invention, it is possible for the locking member to have a lateral recess which extends in the direction of displacement thereof and into which engages an abutment which delimits the adjusting stroke movement of the locking member and which also secures the locking member in its guide means in the bottom portion of the vice when it is not to be positively displaced in the direction of movement thereof, by the actuating means.
In order that the invention may be clearly understood and readily carried into effect one embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 shows a partly sectional side view of the embodiment;
Figure 2 shows a view of the embodiment of
Figure 1 in section taken along line Il-Il in
Figure 1;
Figure 3 shows a view of part of the vice shown in Figure 2, in the direction of the arrow Ill shown therein, and
Figure 4 shows a plan view of the embodiment shown in Figures 1 and 2.
Referring to the drawings, the bottom portion of the machine screw vice is denoted by reference numeral 1, while a clamping jaw which is fixed thereon is denoted by reference numeral 2. An adjustable clamping jaw 3 is disposed on a slide member or carriage 4 which is displaceable by means of a screwthreaded spindle 5. The slide member 4 is guided displaceably on a bottom portion 1 of the vice on the outside thereof, at outer guide bar portions 6, while a spindle nut 8 which mounts the screwthreaded spindle 5 is guided displaceably in the direction of displacement of the slide member 4, on the inside, in a guide recess 7.For that purpose, the spindle nut 8 is provided with a guide base portion 9 which is comparatively long in the direction of displacement and which has guide bar portions 10 projecting therefrom on both sides, which formlockingly or positively engage into guide grooves 11 which are disposed in mutually oppositely disposed relationship in the side walls of the guide recess 7 of the bottom portion 1 of the vice.
Accordingly, the guide base portion 9 and therewith the spindle nut 8 is immovable in any direction transversely with respect to the guide direction indicated in Figure 1 by the doubleheaded arrow 14. So that the guide base portion 9 can be fixed in position lengthwise of its guide means in the bottom portion 1 of the vice, provided on the guide base portion 9 is a toothed rack 1 2 which extends over the length of the region of movement of the guide base portion 9 and which has teeth 12.1 extending transversely with respect thereto.The arrangement also includes a locking member 1 3 which is disposed immovably in the guide direction 12 of the guide base portion 9 in the bottom portion 1 of the vice and which is guided in the bottom portion 1 of the vice displaceably with respect to the toothed rack 12 and which is provided with a locking head which carries a co-operating tooth arrangement 13.1 that fits into the tooth arrangement 12.1 of the toothed rack 12 so that, when the teeth come into engagement with each other, the locking member 13 locks the guide base portion 9, to prevent movement thereof. The toothed rack 12 is disposed on the underside of the guide base portion 9, centrally between the guide bar portions 10.The locking member 13 is a pin of circular cross-section, which is guided perpendicularly in the bottom of the guide recess 7, with an actuating means being provided for displacement of the locking pin from the exterior. The actuating means if formed from a shaft portion 15 which is mounted in the bottom portion 1 of the vice, rotatably by means of a handle 1 6 about an axis 1 5.1 which is perpendicular to the axis 13.2 of the pin forming the locking member.At its end wnich is towards the locking member 13, the shaft portion 1 5 carries an eccentric pin portion 1 7 which engages into a groove 1 8 in the locking member 13, the groove extending transversely with respect to the direction of displacement of the locking member 1 3. Accordingly, rotating the shaft portion 1 5 by means of the handle 16 causes the locking member 1 3 to be reciprocated in its guide means, by way of the eccentric pin portion 17, so that a condition of engagement between the two tooth arrangements can be produced or released respectively. In that connection, for the sake of clarity of the drawing,
Figure 2 shows the lever 1 6 for operating the shaft portion 15, in a position in which it is displaced through 900. The actual conditions are to be seen from Figure 3 which shows that it is only when the hand lever 1 6 is turned over towards the right (the position shown in solid lines) that the locking member 13 is lifted into a position of engagement between the respective tooth arrangements, whereas when the lever 1 6 is laid over towards the left (the position shown in dash-dotted linesi, the locking member is moved downwardly to such an extent that the engagement between the teeth
12.1 and 13.1 of the guide base portion 9 and the locking head of the locking member 13 is released.With the locking member 13 in that position, the guide base portion 9 and therewith the spindle nut, and accordingly therefore also the slide member 4 with the movable clamping jaw 3 carried thereby, can be readily displaced in the direction indicated by the arrow 1 4. The guide base portion 9 is locked by moving the hand lever 1 6 into the position shown on the right in Figure 3; in that connection, the locking effect can be produced with one and the same locking member 1 3, in displaced positions in respect of the guide base portion 9, which are in close succession in the guide direction (arrow 14), the positions in which the guide base portion 9 can be locked each being displaced relative to the adjacent position by one tooth gap of tne tooth arrangements 12.1 and 13.1.As can be seen from Figure 1, the teeth are of trapezoidal cross-section so that, when the locking member 13 is displaced into the locking position, the two sets of teeth 12.1 and 13.1 on the locking member 13 and on the guide base portion 9 respectively can always come into engagement with each other. The shaft portion 1 5 is also secured against axial movement thereof, for which purpose the shaft portion, at 19, is provided with an annular groove into which engages a locking peg 20 mounted in the bottom portion 1 of the vice.The locking member 1 3 is provided with a lateral recess 21 which extends in the direction of displacement of the locking member and into which engages an abutment member 22 for restricting the adjusting stroke movement of the locking member 1 3. The abutment 22 prevents the locking member 13 from falling out of its guide means in the bottom portion 1 of the vice, if the shaft portion 1 5 should be retracted in its guide means, for example when dealing with assembly or maintenance operations, to such an extent that the eccentric pin portion 1 7 comes out of the transverse groove 1 8 in the locking member 13.The abutment 22 also prevents rotary movement of the locking member 13 so that the teeth 1 3.1 are always positioned parallel to the gaps between the teeth of the array of teeth 1 2, thereby ensuring that the locking action can always be produced without difficulty.
The construction and mode of operation of the screwthreaded spindle 5, as is generally known, is not shown in detail in the drawing and therefore does not need to be described further herein. In the present context, suffice it to say that the screwthreaded spindle 5 only serves to provide for high-speed adjustment of the movable clamping jaw 3 in the spindle nut 8, but a hydraulic system is provided to generate the actual clamping force, which system can be actuated by way of a spindle insert 23 which is disposed in the hollow interior of the screwthreaded spindle 5.
Accordingly, the mode of operation of the illustrated vice may be briefly described in the following terms:
Firstly, with the guide base portion 9 in an unlocked condition, the guide base portion, with the spindle nut 8 and the screwthreaded spindle 5, is coarsely set to the dasired clamping width which is indicated by the double-headed arrow 24 in Figure 1. When the guide base portion 9 has been locked in that position as shown in Figure 1 by means of the locking member 13, further coarse adjustment of the movable clamping jaw 3 is effected by rotating the screwthreaded spindle 5 in the spindle nut 8, until both clamping jaws, 2, 3 bear against the workpiece. That rotary movement of the screwthreaded spindle is produced by means of the hand crank 25 which can be taken off and turned over and which, as long as the movable jaw 3 is still not in contact with the workpiece, rotatably entrains the screwthreaded spindle 5 by way of a torque coupling (not shown in the drawing). It is only when both jaws 2, 3 are in contact with the workpiece and the screwthreaded spindle 5 can therefore no longer continue to rotate in the spindle nut 8 that the torque coupling between the hand crank 25 and the screwthreaded spindle 5 is opened so that further rotation of the hand crank 25 now actuates the spindle insert 23 and thereby, by way of the pin member 26, the hydraulic clamping means.
Claims (6)
1. A vice comprising two clamping jaws of which at least one is movable and is adjustable by a screwthreaded spindle which is mounted in a spindle nut which is displaceable in the direction of adjustment of the movable clamping jaw, with a guide base portion in a guide means, formed by guide grooves and guide bar portions laterally engaging therein, in a vice bottom portion which carries the other clamping jaw, and comprising a means for fixing the guide base portion in its guide means in the vice bottom portion, the means for fixing the guide base portion comprising a toothed rack on the guide base portion, which extends over the length of its range of displacement in the guide direction thereof and has teeth extending transversely to said direction, and a locking member which is disposed in the bottom portion of the vice immovably in the guide direction of the guide base portion and which is guided displaceably with respect to the tooth rack and which is provided with a locking head which carries a co-operating tooth arrangement fitting into the tooth arrangement of the toothed rack and which, in the condition of engagement of the tooth arrangements, locks the guide base portion to prevent movement thereof.
2. A vice according to claim 1 in which the guide bar portions are arranged laterally on the guide base portion and the guide grooves are arranged on the side walls of a guide recess which is provided in the bottom portion of the vice for the guide base portion, with the guide bar portions and the guide grooves being disposed opposite to each other and positively engaging into each other, the toothed rack is disposed on the underside of the guide base portion centrally between the guide bar portions, and the locking member is a pin of circular cross-section, which is guided perpendicularly in the bottom of the guide recess, an actuating means being provided for adjusting the pin from the exterior.
3. A vice according to claim 2, in which the actuating means is formed from a shaft portion which is mounted in the bottom portion of the vice to be rotated by means of a hand lever about an axis which is perpendicular to the axis of the pin forming the locking member, and which is provided at its end towards the locking member with an eccentric pin portion which engages into a groove in the locking member, the groove extending transversely with respect to the direction of movement of the locking member.
4. A vice according to claim 3, in which the shaft portion is secured to prevent sliding movements thereof.
5. A vice according to one of claims 1 to 4 in which the locking member has a lateral recess which extends in the direction of displacement thereof and into which engages an abutment for limiting the adjusting stroke movement of the locking member.
6. A vice substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19823244377 DE3244377A1 (en) | 1982-12-01 | 1982-12-01 | VICE OR THE LIKE TENSION DEVICE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8330216D0 GB8330216D0 (en) | 1983-12-21 |
| GB2130932A true GB2130932A (en) | 1984-06-13 |
| GB2130932B GB2130932B (en) | 1986-01-22 |
Family
ID=6179493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08330216A Expired GB2130932B (en) | 1982-12-01 | 1983-11-11 | Vice or like clamping device |
Country Status (6)
| Country | Link |
|---|---|
| BR (1) | BR8306598A (en) |
| DE (1) | DE3244377A1 (en) |
| ES (1) | ES276045Y (en) |
| FR (1) | FR2537035B1 (en) |
| GB (1) | GB2130932B (en) |
| IT (2) | IT1175286B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4807269A (en) * | 1987-04-02 | 1989-02-21 | Grady John K | Apparatus for powering x-ray tubes |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB509881A (en) * | 1937-09-30 | 1939-07-24 | Albert Mossaz | Improvements in and relating to vices |
| GB605076A (en) * | 1945-12-13 | 1948-07-15 | Crolt Engineering Ltd | Improvements in or relating to vices |
| GB629938A (en) * | 1947-12-24 | 1949-09-30 | Central Tool And Equipment Com | Improvements in or relating to work-holding vices |
| GB705600A (en) * | 1951-02-28 | 1954-03-17 | Theodore Alexander Clarke | Improvements in and relating to work-holding vices |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2511843A (en) * | 1950-06-20 | Screw-actuated vise jaw quickly | ||
| US1428996A (en) * | 1920-12-13 | 1922-09-12 | Athol Machine Company | Vise |
| US1753924A (en) * | 1927-04-22 | 1930-04-08 | Gordon William | Screw-actuated vise |
| US2359951A (en) * | 1942-09-05 | 1944-10-10 | Nathan W Warman | Quick-action vise |
| US2485641A (en) * | 1945-04-28 | 1949-10-25 | Birtman Electric Co | Screw operated vise having a toothed nut and displaceable ratchet for quick opening |
| US2471444A (en) * | 1945-05-02 | 1949-05-31 | Birtman Electric Co | Base lock for vises |
| US2484641A (en) * | 1945-10-12 | 1949-10-11 | Western Electric Co | Method of separating adhering sheets by an air blast |
| DE1040467B (en) * | 1954-08-12 | 1958-10-02 | Hilma G M B H Maschf | Upper pressure parallel vice |
| US3088729A (en) * | 1960-11-08 | 1963-05-07 | Marcus Abraham | Quick-acting vises |
| DE1247228B (en) * | 1961-08-19 | 1967-08-10 | Maschf Augsburg Nuernberg Ag | Vice for machine tools |
-
1982
- 1982-12-01 DE DE19823244377 patent/DE3244377A1/en not_active Withdrawn
-
1983
- 1983-11-11 GB GB08330216A patent/GB2130932B/en not_active Expired
- 1983-11-28 FR FR8318927A patent/FR2537035B1/en not_active Expired
- 1983-11-30 BR BR8306598A patent/BR8306598A/en not_active IP Right Cessation
- 1983-11-30 IT IT68255/83A patent/IT1175286B/en active
- 1983-11-30 IT IT8353998U patent/IT8353998V0/en unknown
- 1983-11-30 ES ES1983276045U patent/ES276045Y/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB509881A (en) * | 1937-09-30 | 1939-07-24 | Albert Mossaz | Improvements in and relating to vices |
| GB605076A (en) * | 1945-12-13 | 1948-07-15 | Crolt Engineering Ltd | Improvements in or relating to vices |
| GB629938A (en) * | 1947-12-24 | 1949-09-30 | Central Tool And Equipment Com | Improvements in or relating to work-holding vices |
| GB705600A (en) * | 1951-02-28 | 1954-03-17 | Theodore Alexander Clarke | Improvements in and relating to work-holding vices |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3244377A1 (en) | 1984-06-07 |
| GB2130932B (en) | 1986-01-22 |
| IT1175286B (en) | 1987-07-01 |
| IT8353998V0 (en) | 1983-11-30 |
| FR2537035B1 (en) | 1989-08-18 |
| FR2537035A1 (en) | 1984-06-08 |
| ES276045U (en) | 1984-05-01 |
| IT8368255A0 (en) | 1983-11-30 |
| BR8306598A (en) | 1984-07-10 |
| GB8330216D0 (en) | 1983-12-21 |
| ES276045Y (en) | 1984-12-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19951111 |