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 provided with a spindle head (31) and has an external thread (33) which corresponds to an internal thread arranged on the rear jaw (1), wherein means (5) for attaching a torque wrench can be attached to the spindle head (31).

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 provided with a spindle head and has an 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 lead screw. The lead screw is equipped with a handle, allowing it to rotate. A rotational movement of the handle causes a longitudinal movement of the lead screw 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, there are known applications where a certain clamping force acting on the workpiece must not be exceeded, for example, to prevent deformation or damage to the workpiece. Since the known vises do not offer any means of testing the clamping force, compliance with a maximum clamping force depends solely on the experience of the operator using the vise.

[0004] To avoid this disadvantage, it is known to integrate a torque measuring device into a vise (see, for example, DE 1 220 800 A). This involves the use of a torque clutch that triggers when a preset torque is reached. While this solution allows monitoring of the tightening torque, it requires a considerable amount of design effort. Furthermore, this solution cannot be used or retrofitted to existing vises.

[0005] Against this background, the present invention aims to create a vise with which the clamping force can be limited to the desired level without significant design complexity. According to the invention, this objective is achieved by the features of claim 1.

[0006] The invention provides a vise that allows the clamping force to be limited to the desired level without significant design effort. The solution according to the invention makes it possible to attach a standard torque wrench to the spindle head and thus precisely adjust the clamping force to the specified value. Furthermore, the solution according to the invention is suitable for use with conventional vises without requiring any modifications or similar alterations.

[0007] A torque wrench is a hand-operated tool used to apply a defined tightening torque to a bolted connection. This ensures the necessary clamping force between the components being joined, even when maximum operating forces are applied. When using so-called click-type torque wrenches, exceeding the desired torque is prevented by the wrench slipping upon reaching the set torque, thus preventing further torque application.

[0008] In a further development of the invention, the means for attaching a torque wrench are formed by an internal polygon that is formed in the spindle head. In this way, a polygonal pin arranged on the torque wrench can be directly attached to the spindle head and thus to the spindle.

[0009] In another embodiment of the invention, the means for attaching a torque wrench are formed by an external polygon that is formed on the circumference of the spindle head. This allows a socket attached to the torque wrench to be directly attached to the spindle head and thus to the spindle itself.

[0010] The means for attaching a torque wrench are advantageously provided by an attachment. Using an attachment offers the benefit of being able to attach a torque wrench to a standard vise spindle.

[0011] In one embodiment of the invention, the attachment has a receptacle for the spindle head. This embodiment offers a precise solution for mounting on known vise spindles.

[0012] In another embodiment of the invention, the receptacle is designed in the form of a hollow cylinder. The hollow cylinder causes the spindle head to be completely immersed in the receptacle, thereby improving the stability of the arrangement on the spindle.

[0013] Preferably, the wall of the receptacle features two milled grooves, each with an undercut. These grooves allow the handle to pass through when the attachment is fitted. When the torque wrench is operated, the undercuts cause the handle to partially engage in the grooves, creating a positive-locking connection.

[0014] Preferably, a magnet is arranged in the base of the holder. The magnet ensures a reliable hold of the holder on the spindle head, so that it remains reliably positioned on the spindle head even when not in use.

[0015] 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, the three-dimensional representation of a vise; Figure 2, the view of a spindle with external polygon; and Figure 3, the end-face view of the Figure 2 The depicted spindle; Figure 4, the three-dimensional representation of an attachment; Figure 5, the underside view of the in Figure 4 Figure 6 shows the attachment as depicted; Figure 6 shows the three-dimensional representation of an attachment in its position on the spindle head; Figure 7 shows the three-dimensional representation of an attachment in a different embodiment; Figure 8 shows the underside of the attachment in Figure 7 the essay shown; Figure 9 the three-dimensional representation of the in Figure 7 The attachment shown is in the state arranged on the spindle head.

[0016] 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 along a guide (not shown). The rear jaw 1 and the front jaw 2 are connected to each other via a spindle 3.

[0017] 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 formed. At its lower end facing the floor, a base 13 is formed on the base body 11, which in the exemplary embodiment is provided with two holes 14 for attachment to a workbench, a welding table or the like.

[0018] The front jaw 2 is also designed as a drop-forged part. It is essentially formed from a base body 21 to which a front jaw 22 is formed.

[0019] The spindle 3 has a spindle head 31 at one end. In the exemplary embodiment, the spindle head 31 is shown according to the Figure 1 and 6 The spindle 3 is provided with a through-bore 32, which is penetrated by a lever 4. At its end facing away from the spindle head 31, the spindle 3 is provided with a thread 33. Between the thread 33 and the spindle head 31, a circumferential groove 34 is provided in the spindle 3 for receiving a snap ring.

[0020] Means 5 for attaching a torque wrench can be mounted on the spindle head 31. The means 5 can be directly and permanently connected to the spindle 3. This is the case in the embodiments according to the Figures 1 to 3 the case.

[0021] The means 5 are in the exemplary embodiment according to Figure 1formed by an internal polygon 51, which is formed in the spindle head 31. In the exemplary embodiment, this is an internal square which is suitable and intended for receiving a square pin, such as is frequently used on torque wrenches.

[0022] In the exemplary embodiment according to the Figures 2 and 3 In contrast, the means 5 are formed by an external polygon 52, which is formed on the circumference of the spindle head 31. In the exemplary embodiment, this is an external hexagon, which serves to engage a conventional socket.

[0023] In the exemplary embodiment according to Figure 1It is evident that a lever 4 is provided, which passes through the spindle 3 and with which the spindle 3 can be actuated in a known manner. The situation is different, however, with the spindle 3 shown in Figures 2 and 3. Here, the spindle is actuated by means of a ratchet, a cross wrench, also known as a wheel wrench or rotary wrench, or the like, which is placed on the external polygon 52.

[0024] In the exemplary embodiment according to the Figures 4 to 8 In contrast, a conventional spindle 3 with a conventional spindle head 32 is used. The means 5 for attaching a torque wrench are formed by an attachment 53, which has a receptacle 54 for the spindle head 31. The receptacle 54 is designed in the form of a hollow cylinder. It therefore has a wall 55 with a round cross-section. In the exemplary embodiment, the following are located in the wall 55: Figures 4 to 6Two milled grooves 56 are formed directly opposite each other, extending parallel to the longitudinal centerline of the attachment 53. Each milled groove 56 has an undercut 57. In the exemplary embodiment according to the Figures 7 to 9 In contrast, two boreholes 50 directly opposite each other are formed in the wall 55.

[0025] The attachment 53 has a base 58, which forms the bottom of the receptacle 54. The attachment 53 also has an external polygon 59, which in the exemplary embodiment is designed as an external square. The external polygon 59 is arranged on the side of the base 59 facing away from the wall 55. In the basic of the receptacle 54, according to the exemplary embodiment... Figures 4 to 6 a magnet 6 arranged.

[0026] When using means 5 to attach a torque wrench according to the exemplary embodiment according to the Figures 4 to 6The attachment 53 is simply placed onto the standard spindle head 31. This is done by immersing the spindle head 31 into the receptacle 54. The attachment 53 is oriented in such a way that the lever 4 can enter and pass through the milled recesses 56. The attachment 53 has reached its final position when the lever 4 is located at the bottom of the milled recesses 56 in the area of ​​the undercuts 57, as shown in Figure 6 This is evident. In this position, the magnet 6 is in contact with the spindle head 31. Therefore, the attachment 53 is securely positioned on the spindle head 31 in this position. Consequently, the spindle 3 can be operated reliably and without obstruction, even with the attachment 53 in place.

[0027] When using means 5 to attach a torque wrench according to the exemplary embodiment according to the Figures 6 to 9The attachment 53 is also placed on the usual spindle head 31, but before the lever 4 is positioned in the bore 32 in the spindle head 31. Once the attachment 53 is positioned on the spindle head 31 in this embodiment, the bores 50 and bore 32 in the spindle head 31 are aligned one above the other. Subsequently, the lever 4 is mounted on the spindle 3 in a known manner, passing completely through the bores 50 and 32, thus capturing the attachment 53 on the spindle 3.

[0028] To adjust or control the desired clamping force, a torque wrench can be attached to the external polygon 59 of the attachment 53 in a known manner by placing the socket of the wrench onto the external polygon 59, thereby creating a positive locking connection.

[0029] Applying force to the torque wrench causes the socket to rotate, and consequently, the attachment 53 rotates. The attachment 53 initially moves relative to the spindle head 31. During this movement, the sections of the lever 4 located in the milled recesses 56 engage with the undercuts 57. Once these sections are engaged in the undercuts 57, a positive connection is established between the attachment 53 and the lever 4. Therefore, further movement of the torque wrench causes the attachment 53, and thus the spindle head 31 along with the spindle 3, to rotate until the torque preset in the torque wrench, and thus the desired clamping force between the front jaw 1 and the rear jaw 2, is reached.When using a trigger torque wrench, reaching this point causes the wrench to slip, preventing further torque application and thus preventing the clamping force from increasing further.

[0030] The same result occurs when using a torque wrench on the solutions according to the exemplary embodiments of the Figures 1 to 3 The difference is that in these cases, the socket or the multi-sided pin on the torque wrench is applied directly to the spindle head 31 of the spindle 3. In the exemplary embodiment according to Figure 1 The polygonal pin of the torque wrench is inserted into the internal polygon 51 of the means 5; in the exemplary embodiment according to the Figures 2 and 3 The socket of the torque wrench is placed on the external polygon 52 of the center 5.

[0031] The invention provides a vise in which exceeding the clamping force can be prevented without significant effort. This applies particularly when using the attachment 53, which is compatible with known vises. Consequently, this solution according to the invention can also be applied to vises already in operation. In the inventive solutions of the exemplary embodiments according to the Figures 1 to 3 Only a modified spindle is used; all other parts of the vise remain unchanged from conventional vises known from the prior art. Consequently, these designs can be optionally incorporated into the manufacturing process of the vises.

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) the one end of which is rotatably mounted in the front jaw (2), wherein the threaded spindle (3) is provided with a spindle head (31) and has an external thread (33) which corresponds to an internal thread arranged on the rear jaw (1), characterized by the fact that Means (5) for attaching a torque wrench can be attached to the spindle head (31).

2. Vise according to claim 1, characterized by the fact that the means (5) for attaching a torque wrench are formed by an internal polygon formed in the spindle head (31).

3. Vise according to claim 1, characterized by the fact that the means (5) for attaching a torque wrench are formed by an external polygon which is formed on the circumference of the spindle head (31).

4. Vise according to one of the aforementioned claims, characterized by the fact that the spindle head (31) is provided with a bore (33) through which a lever (4) is inserted.

5. Vise according to one of the aforementioned claims, characterized by the fact that the means (5) for attaching a torque wrench are formed by an attachment (53).

6. Vise according to claim 5, characterized by the fact that the attachment (53) has a receptacle (54) for the spindle head (31).

7. Vise according to claim 6, characterized by the fact that the receptacle (54) is designed in the form of a hollow cylinder with a wall (55) that is round in cross-section.

8. Vise according to claim 7, characterized by the fact that In the wall (55) of the receptacle (54) two milled grooves (56) are formed, each having an undercut (57).

9. Vise according to claim 7, characterized by the fact that Two bores (50) are formed in the wall (55) of the receptacle (54).

10. Vise according to one of claims 5 to 9, characterized by the fact that the attachment (53) has an external polygon (59).

11. Vise according to one of claims 5 to 10, characterized by the fact that a magnet (6) is arranged in the recording (54).

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