Vice

Abstract

The invention relates to a vise comprising a fixed rear jaw (1) and a front jaw (2) which is displaceable along a guide relative to the rear jaw (1) via a threaded spindle (3), one end of which is rotatably mounted in the front jaw (2), wherein the threaded spindle (3) is fixed in the front jaw (2) and is provided with a spindle head (31) and has a first external thread (33) which corresponds to an internal thread arranged on the rear jaw (1), wherein the threaded spindle (3) is fixed in the front jaw (2) by means of a sleeve which is attached to the threaded spindle (3).

Description

[0001] The invention relates to a vise comprising a fixed rear jaw and a front jaw which is displaceable along a guide relative to the rear jaw via a threaded spindle, one end of which is rotatably mounted in the front jaw, wherein the threaded spindle is guided through a cylindrical passage arranged for this purpose in the front jaw and has a spindle head at its end, the diameter of which is larger than the passage, and wherein the threaded spindle has a first external thread which corresponds to an internal thread arranged on the rear jaw.

[0002] Vises are known in a wide variety of designs. They feature a fixed jaw and a front jaw that can be moved relative to it via a leadscrew. The leadscrew is secured to the front jaw by a snap ring. The leadscrew is equipped with a handle, allowing it to rotate. A rotational movement of the handle causes a longitudinal movement of the leadscrew and the movable front jaw, clamping or releasing a workpiece between the jaws. For mounting on a base, vises typically have a base with holes for mounting screws. Such a vise is described, for example, in EP 1 884 317 A1.

[0003] The known vises meet the requirements placed upon them. However, a disadvantage is that with these vises, clamping is only possible between the front and rear jaws. This is because the clamping force can only be generated in one direction with these vises: when tightening, i.e., when the jaws move towards each other. A force in the opposite direction, i.e., when loosening, when the jaws move away from each other, cannot be generated because the retaining ring fails.

[0004] Against this background, the present invention aims to create a vise that allows force to be applied both when tightening and loosening. According to the invention, this objective is achieved by the features of claim 1.

[0005] The invention provides a vise that allows for force to be applied during both tightening and loosening. By fixing the threaded spindle in the front jaw using a sleeve attached to the threaded spindle, a wide contact point is achieved on the threaded spindle, through which forces acting on the sleeve are transmitted to the threaded spindle. In this context, "fixing" refers to a rotationally fixed and non-displaceable attachment of the sleeve to the threaded spindle.

[0006] The solution according to the invention makes it possible to clamp components in the vise that are not clamped between the jaws, but are held in the vise by means of the jaws under the influence of a tensile force.

[0007] In a further development of the invention, the sleeve is a threaded sleeve that is screwed onto a second external thread provided for this purpose on the spindle, with means for rotationally fixing the threaded sleeve to the spindle being arranged. The threads of the threaded sleeve and spindle ensure stable transmission of applied forces. The means for fixing the threaded sleeve screwed onto the second external thread can, for example, be a lock nut or an adhesive layer between the threaded sleeve and the second external thread.

[0008] In one embodiment of the invention, the means comprise at least one setscrew that can be screwed into a threaded bore radially aligned for this purpose in the threaded sleeve. Preferably, the threaded spindle is provided in the region of the second external thread with at least one bore or an axially aligned groove for engaging a setscrew. The bore or groove enables a positive locking mechanism for the rotationally fixed retention of the threaded sleeve on the spindle, thereby preventing rotation of the threaded sleeve on the spindle. The provision of an axial groove simplifies the positioning of the setscrew to achieve this positive locking mechanism.

[0009] In an embodiment of the invention, the second external thread 35 has a larger outer diameter and preferably a smaller pitch than the first external thread 33. This enables precise positioning of the threaded sleeve on the spindle. The threaded sleeve preferably projects beyond the front jaw in certain areas.

[0010] In a further embodiment of the invention, the threaded sleeve is arranged within the front jaw. For this purpose, a recess is provided in the front jaw, which is preferably cylindrical and is concentric to a passage arranged in the front jaw through which the spindle passes. The threaded sleeve rests against the wall of the front jaw in the direction of the spindle head.

[0011] In a further development of the invention, the threaded sleeve projects beyond the front jaw in the direction of the rear jaw in certain areas. This results in a wider thread engagement area between the threaded sleeve and the second external thread of the spindle, thereby improving the dissipation of axial forces acting on the spindle.

[0012] In one embodiment of the invention, the front jaw and the rear jaw each have a workpiece support equipped with clamping elements positioned orthogonally to them. This enables the clamping of hollow bodies, particularly tubular ones, by means of internal tensile forces. Preferably, the clamping elements are formed by pins, which are preferably cylindrical.

[0013] In a further embodiment of the invention, the clamping elements are detachable, preferably connected to the respective workpiece support by a screw or plug connection. This allows different clamping devices to be used depending on the workpiece to be clamped.

[0014] Other embodiments and configurations of the invention are specified in the remaining dependent claims. Exemplary embodiments of the invention are illustrated in the drawings and are described in detail below. The drawings show: Figure 1: View of a vise; Figure 2: Top view of the vise. Figure 1 The vise shown; Figure 3, the front view of the vise in Figure 1 The vise shown in Figure 4; the longitudinal section through the vise shown in Figure 4. Figure 1 The illustrated vise; Figure 5, the enlarged view of a threaded spindle; Figure 6, detail "A" from Figure 5Figure 7 shows an enlarged view of a threaded sleeve; Figure 8 shows a section along line AA. Figure 7 .

[0015] The vise chosen as an exemplary embodiment essentially consists of a fixed rear jaw 1 and a front jaw 2, which is slidably arranged relative to the rear jaw 1. The rear jaw 1 and the front jaw 2 are connected to each other via a threaded spindle 3. The threaded spindle 3 is fixed in the front jaw 2. The front jaw 2 is welded to a slide rail 4; the rear jaw 1 is guided in the slide rail 4.

[0016] The rear jaw 1 is manufactured as a drop-forged part and essentially consists of a base body 11 to which a front jaw 12 is integrally formed. At its lower end, facing the floor, a base 13 is integrally formed on the side of the base body 11 opposite the front jaw 12. In the exemplary embodiment, this base 13 is provided with four holes 14 for attachment to a workbench, welding table, or the like. In the exemplary embodiment, the front jaw 12 is provided with a workpiece support 15, which is screwed to the front jaw 12. The workpiece support 15 is provided with vertically oriented holes 16 into which clamping elements, in particular cylindrical pins, can be inserted. A bore is formed in the base body 11, which has a spindle nut 17.

[0017] The front jaw 2 is also designed as a drop-forged part. It is essentially formed from a base body 21 to which a secondary jaw 22 is integrally formed. In the exemplary embodiment, the secondary jaw 22 is provided with a workpiece support 23, which is screwed to the secondary jaw 22. The workpiece support 23 has vertically oriented holes 24 into which pins can be inserted. A cylindrical passage 25 is incorporated into the front jaw 2, which transitions on its side facing the rear jaw 1 into a cylindrical recess 26 with an increased diameter.

[0018] The threaded spindle 3 runs parallel to the slide rail 4 between the base 13 and the clamping jaws 12, 22 of rear jaw 1 and front jaw 2, thereby transferring the weight load of a workpiece held between the clamping jaws 12, 22 directly to the base 13. The threaded spindle 3 is guided through the opening 25 of the front jaw 2 and has a spindle head 31 at one end, the outer diameter of which is larger than the diameter of the opening 25 of the front jaw 2 against which it rests. The spindle head 31 is provided with a through-bore 32, which is penetrated by a lever (not shown). At its end opposite the spindle head 31, the spindle 3 is provided with a first external thread 33, which engages with the spindle nut 17 in the rear jaw 1. Between the spindle head 31 and the first external thread 33, two opposing and axially aligned longitudinal grooves 34 are formed in the threaded spindle 3.Furthermore, the spindle 3 has a second external thread 35 between the spindle head 31 and the first external thread 33, which has a larger outer diameter and a smaller pitch than the first external thread 33.

[0019] According to the invention, the threaded spindle 3 is fixed in the front jaw 2 by means of a threaded sleeve 5. The threaded sleeve 5 is screwed onto the second external thread 35 of the spindle 3 and held in the cylindrical recess 26 of the front jaw 2. In the exemplary embodiment, a snap ring 6 is arranged between the threaded sleeve 5 and the front jaw 2 in the cylindrical recess 26, by means of which the threaded spindle 3 is held in the front jaw.

[0020] The inner diameter of the threaded sleeve 5 is larger than the outer diameter of the first external thread 33 of the threaded spindle 3, thus enabling easy assembly. As particularly evident from the Figure 1 and 4As can be seen, the threaded sleeve 5 protrudes in some areas towards the rear jaw 1 beyond the front jaw 2. The internal thread 53 of the threaded sleeve 5 engages with the second external thread 35 of the spindle 3 and is screwed onto it. The threaded sleeve 5 has at least one radially oriented threaded bore 51; in the exemplary embodiment, two radially opposite threaded bores 51 are formed.

[0021] Threaded studs 52 can be screwed into the threaded bores 51. In the assembled position, the threaded sleeve 5 is aligned on the spindle 3 such that the threaded bores 51 are located above the longitudinal grooves 34 in the spindle 3. Therefore, after being screwed into the threaded bores 51, the ends of the threaded studs 52 facing the spindle 3 protrude into the longitudinal grooves 34 of the spindle 3. This creates a positive-locking connection between the spindle 3 and the threaded sleeve 5. After the threaded studs 52 are screwed in, the threaded sleeve 5 is fixed against rotation on the spindle 3.

[0022] The sole function of the threaded pins 52 is to engage in a longitudinal groove 34 of the threaded spindle 3, thus preventing the threaded sleeve 5 from rotating in the position it achieves by screwing onto the second external thread 35. Of course, a cotter pin or a plug can also be used instead of a threaded pin. However, the threaded pin 52 has the advantage that it can also be clamped against the bottom of the longitudinal groove 34.

[0023] The threaded sleeve 5 enables the threaded spindle 3 to transmit forces both when tightening and loosening the vise. This is not possible with the previously known method of fixing the spindle using a snap ring. Snap rings absorb limited forces acting along the axis of a rotating body – in the case of vises, the threaded spindle. They merely secure the threaded spindle 3 in the front jaw 2 and engage it when loosening. When tightening the threaded spindle 3, the clamping forces are absorbed by the spindle head 31, which rests against the front jaw 2. If clamping forces were to occur during loosening, the snap ring would fail.

[0024] In contrast, the threaded sleeve 5, installed according to the invention to fix the threaded spindle 3, also fixes the threaded spindle 3 in the front jaw 2 and engages it during tightening. Furthermore, its internal thread, which engages with the second external thread 35, allows clamping forces to be absorbed during tightening. Consequently, it is possible to clamp workpieces even during tightening. This can be achieved, for example, by inserting pins into four holes 16 and 24, as mentioned above. A ring to be machined can then be placed around these four pins on the workpiece supports 15 and 23. When the spindle 3 is tightened, the pins press against the inside of the ring, thus clamping it in the vise. The clamping forces are absorbed by the threaded connection between the threaded sleeve 5 and the second external thread 35 of the threaded spindle 3.Such clamping during the turning process is not possible with vises known from the state of the art.

[0025] The threaded sleeve 5 is arranged offset relative to the front jaw 22 of the front jaw 2 in the direction of the spindle head 31, whereby the threaded sleeve 5 does not impair the receiving space between the front jaws 12, 22 of rear jaw 1 and front jaw 2.

Claims

1. Vise comprising a fixed rear jaw (1) and a front jaw (2) which is displaceable along a guide relative to the rear jaw (1) via a threaded spindle (3), one end of which is rotatably mounted in the front jaw (2), wherein the threaded spindle (3) is guided through a cylindrical opening arranged for this purpose in the front jaw (2) and has a spindle head (31) at its end, the diameter of which is larger than the opening, and wherein the threaded spindle (3) has a first external thread (33) which corresponds to an internal thread arranged on the rear jaw (1), characterized by the fact that The threaded spindle (3) is fixed in the front jaw (2) by means of a sleeve which is attached to the threaded spindle (3).

2. Vise according to claim 1, characterized by the fact thatthe sleeve is a threaded sleeve (5) which is screwed onto a second external thread provided for this purpose on the spindle, wherein means for rotationally fixed the threaded sleeve on the spindle are arranged.

3. Vise according to claim 2, characterized by the fact that the means shall comprise at least one threaded stud (52) which can be screwed into a threaded bore (51) radially aligned for this purpose in the threaded sleeve (5).

4. Vise according to claim 3, characterized by the fact that the threaded spindle (3) in the area of ​​the second external thread (35) is provided with at least one bore or an axially aligned groove (34) for engagement of a threaded pin (52).

5. Vise according to one of claims 2 to 4 characterized by the fact that the second external thread 35 has a larger outer diameter and preferably a lower pitch than the first external thread 33.

6. Vise according to one of claims 2 to 5, characterized by the fact thatthe threaded sleeve (5) is arranged in the front jaw (2).

7. Vise according to one of claims 2 to 6, characterized by the fact that the threaded sleeve (5) protrudes in some areas towards the rear jaw (1) beyond the front jaw (2).

8. Vise according to one of the aforementioned claims, characterized by the fact that the front jaw (2) and the rear jaw (2) have a workpiece support (15, 23) which are provided with clamping pieces arranged orthogonally to these.

9. Vise according to claim 8, characterized by the fact that The clamping pieces are formed by preferably cylindrical pins.

10. Vise according to claim 8 or 9, characterized by the fact that the clamping pieces are detachably connected to the workpiece supports (15,23), preferably by means of a screw or plug connection.

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