Clamp

Abstract

The utility model discloses a clamp, which relates to the technical field of clamps and comprises a clamp body, a first clamping plate, a second clamping plate and a driving mechanism, the second clamping plate is fixedly connected onto the clamp body, and the first clamping plate can be movably connected onto the clamp body and can be close to or far away from the second clamping plate. A containing space used for containing a workpiece is formed between the first clamping plate and the second clamping plate, a first positioning pin is arranged on the first clamping plate, a second positioning pin is arranged on the second clamping plate, and positioning holes are formed in the side walls of the workpiece. The first positioning pin and the second positioning pin can be inserted into one positioning hole to position the workpiece placed in the containing space, the driving mechanism is connected to the clamp body, and the driving mechanism can drive the first clamping plate to be close to the second clamping plate and enable the first clamping plate and the second clamping plate to clamp the workpiece. According to the clamp, the clamping force of the clamp can be improved, and accurate positioning can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fixture, in particular to a fixture. BACKGROUND

[0002] In the mechanical processing manufacturing industry, the clamping fixture plays a very important role, which ensures that the workpiece is always in the correct position relative to the machine tool, tool and the like, and guarantees the consistency and processing quality of the workpiece.

[0003] Patent (CN 109664128B) discloses a kind of clamping fixture, the clamping fixture is slid up and down by air cylinder and drives clamping plate, clamping plate unilateral pressing is clamped to workpiece, the clamping fixture is complex, and the volume is relatively large, clamping plate is positioned slowly in the process of sliding up and down, and unilateral pressing is prone to cause displacement of workpiece in the processing process, it is difficult to realize the accuracy of positioning, thereby a large amount of waste material can be generated, to lead to the increase of production cost. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of fixture to solve the problems existing in the prior art, improve the clamping force of clamping fixture, and can be positioned accurately.

[0005] To achieve the above object, the utility model provides the following scheme:

[0006] The utility model provides a kind of fixture, including fixture body, first clamping plate, second clamping plate and drive mechanism, the second clamping plate is fixedly connected on the fixture body, the first clamping plate can be movably connected on the fixture body and can be close to or away from the second clamping plate, there is accommodating space for accommodating workpiece between the first clamping plate and the second clamping plate, first positioning pin is provided on the first clamping plate, second positioning pin is provided on the second clamping plate, and positioning hole is formed on the side wall of workpiece, the first positioning pin and the second positioning pin can be inserted into one positioning hole to position workpiece placed in the accommodating space, the drive mechanism is connected on the fixture body, the drive mechanism can drive the first clamping plate close to the second clamping plate and make the first clamping plate and the second clamping plate clamp workpiece.

[0007] In some embodiments, the driving mechanism comprises a pressing member and a moving block, the pressing member comprises a rod body and a pressing block, the pressing block is slidingly connected to the clamp body, the clamp body is provided with a threaded hole, the rod body passes through the pressing block and can rotate relative to the pressing block, one end of the rod body is threadedly connected to the threaded hole, the moving block is vertically movably connected to the clamp body and is fixedly connected to the first clamping plate above the first clamping plate, the pressing member and / or the moving block is provided with a pressing slope, the distance between the pressing slope and the first clamping plate gradually increases in the direction close to the threaded hole, and the rod body can drive the pressing block to press the moving block to move in the direction close to the second clamping plate by rotating the rod body.

[0008] In some embodiments, the clamp body is fixedly connected to a cantilever, the cantilever is located below the pressing member, the moving block is vertically movably connected to the cantilever, the cantilever is provided with a first recess on the side close to the first clamping plate, the first positioning pin is movably connected to the first recess, the first recess is provided with a first elastic element, two ends of the first elastic element are in contact with the first positioning pin and the bottom surface of the first recess respectively, the first positioning pin is provided with a limiting portion for limiting the length of the end of the first positioning pin protruding out of the outer wall surface of the moving block, and the first positioning pin can pass through the first clamping plate and be inserted into the first positioning hole.

[0009] In some embodiments, the second clamping plate is provided with a second recess, the second positioning pin is arranged in the second recess, one end of the second positioning pin protrudes out of the outer wall surface of the second clamping plate and can be inserted into the second positioning hole, and the first positioning hole and the second positioning hole are coaxially arranged.

[0010] In some embodiments, the clamp further comprises a third clamping plate, the third clamping plate is provided with a third recess, the third positioning pin is arranged in the third recess, the axis direction of the third positioning pin is perpendicular to the axis direction of the first positioning hole, one end of the third positioning pin protrudes out of the outer wall surface of the third clamping plate and can be inserted into the third positioning hole.

[0011] In some embodiments, the clamp further comprises a second elastic element, the second elastic element is arranged between the moving block and the cantilever, and the moving block can press the second elastic element when moving in the direction close to the second clamping plate.

[0012] In some embodiments, the contact surfaces of the first clamping plate, the second clamping plate and the third clamping plate with the workpiece are all tooth-shaped surfaces.

[0013] In some embodiments, the second positioning pin is movably connected in the second groove, a third elastic element is arranged between the second positioning pin and the bottom surface of the second groove, the third positioning pin is movably connected in the third groove, and a fourth elastic element is arranged between the third positioning pin and the bottom surface of the third groove

[0014] In some embodiments, a long hole is formed in the extrusion block, a first bolt passes through the clamp body and extends into the long hole, and the extrusion block moves relative to the clamp body along a direction parallel to the axis of the rod body through the long hole.

[0015] In some embodiments, a limiting piece is arranged at one end of the rod body, the limiting piece protrudes from the part of the rod body that passes through the extrusion block, and the limiting piece is used to drive the extrusion block to move.

[0016] The utility model discloses relative to prior art has obtained following technical effect:

[0017] The utility model provides a kind of clamp, by being provided with first clamping plate, second clamping plate and drive mechanism, first clamping plate movably connects on clamp body, and first clamping plate is provided with first positioning pin, second clamping plate is fixedly connected on clamp body, and second clamping plate is provided with second positioning pin, drive mechanism can drive first clamping plate close to second clamping plate and make first clamping plate and second clamping plate clamp workpiece, simultaneously, first positioning pin and second positioning pin are inserted into the positioning hole formed on the side wall of workpiece, and workpiece is positioned, therefore, the clamp is positioned by first clamping plate and second clamping plate to the multi-surface clamping of workpiece, and first positioning pin and second positioning pin to the bidirectional positioning of workpiece can improve the clamping force of clamping clamp, and accurate positioning can be carried out. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiments will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0019] Fig. 1 It is the structure schematic view of the clamp in one embodiment of the utility model;

[0020] Fig. 2 It is the sectional view of the clamp in one embodiment of the utility model.

[0021] Wherein: 1-rod body; 2-extrusion block; 3-second elastic element; 4-moving block; 5-first elastic element; 6-first positioning pin; 7-first clamping plate; 8-bolt; 9-workpiece; 10-clamp body; 11-second positioning pin; 12-second clamping plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, obvious and easy to understand, the utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0024] The utility model provides a kind of clamp, as Figs. 1-2 As shown, including clamp body, first clamping plate 7, second clamping plate 12 and drive mechanism, second clamping plate 12 is fixedly connected on clamp body, first clamping plate 7 can be movably connected on clamp body and can be close to or away from second clamping plate 12, there is accommodating space for accommodating workpiece 9 between first clamping plate 7 and second clamping plate 12, first positioning pin 6 is provided on first clamping plate 7, second positioning pin 11 is provided on second clamping plate 12, positioning hole is all set on the side wall of workpiece 9, first positioning pin 6 and second positioning pin 11 can be inserted into one positioning hole to position workpiece 9 placed in accommodating space, drive mechanism is connected on clamp body, drive mechanism can drive first clamping plate 7 close to second clamping plate 12 and make first clamping plate 7 and second clamping plate 12 clamp workpiece 9. The first clamping plate 7 of the present application, second clamping plate 12 and drive mechanism are set, first clamping plate 7 is movably connected on clamp body, and first positioning pin 6 is provided on first clamping plate 7, second clamping plate 12 is fixedly connected on clamp body, and second positioning pin 11 is provided on second clamping plate 12, drive mechanism can drive first clamping plate 7 close to second clamping plate 12 and make first clamping plate 7 and second clamping plate 12 clamp workpiece 9, while first positioning pin 6 and second positioning pin 11 are inserted into the positioning hole set on the side wall of workpiece 9, and workpiece 9 is positioned, therefore, the clamp is clamped by first clamping plate and second clamping plate to the multiple faces of workpiece, and first positioning pin and second positioning pin are bidirectional positioning to workpiece, so that the clamping force of clamping clamp can be improved, and positioning precision can be positioned.

[0025] In some embodiments of the present embodiment, the driving mechanism includes a pressing member and a moving block 4, the pressing member includes a rod body 1 and a pressing block 2, the pressing block 2 is slidingly connected to the clamp body, the clamp body is provided with a threaded hole, the rod body 1 penetrates through the pressing block 2 and can rotate relative to the pressing block 2, one end of the rod body 1 is threadedly connected with the threaded hole, the moving block 4 is vertically movably connected to the clamp body and is fixedly connected with the first clamping plate 7 above the first clamping plate 7, the pressing member and / or the moving block 4 has a pressing inclined surface, the distance from the pressing inclined surface to the first clamping plate 7 gradually increases in the direction close to the threaded hole, and the rod body 1 can drive the pressing block 2 to press the moving block 4 to move in the direction close to the second clamping plate 12 by rotating the rod body 1. The pressing member is threadedly connected with the threaded hole on the clamp body, and the movement of the pressing member in the direction close to or away from the threaded hole can be accurately controlled by rotating the pressing member. This threaded connection mode provides good linear motion control, so that the user can accurately adjust the position of the pressing member according to actual needs; when the pressing member presses the pressing inclined surface of the moving block 4, the moving block 4 moves in the direction close to the second clamping plate 12, because the design of the pressing inclined surface makes the force transmission and conversion more controllable, this structure can convert the horizontal motion of the pressing member into the axial motion of the moving block 4, and can control the moving speed and displacement of the moving block 4 according to the angle of the pressing inclined surface and other factors, so as to accurately control the clamping force of the first clamping plate 7 and the second clamping plate 12 on the workpiece 9, thereby preventing the workpiece 9 from being displaced or deformed during machining. The moving block 4 is fixedly connected with the first clamping plate 7 by the bolt 8, but is not limited to this connection mode.

[0026] In some embodiments of the present embodiment, the clamp body is fixedly connected with a cantilever, the cantilever is located below the pressing member, the moving block 4 is vertically movably connected to the cantilever, the cantilever is provided with a first recess on the side close to the first clamping plate 7, the first positioning pin 6 is movably connected in the first recess, the first recess is provided with the first elastic element 5, two ends of the first elastic element 5 are respectively in contact with the first positioning pin 6 and the bottom surface of the first recess, and the first positioning pin 6 has a limiting portion for limiting the length of the end of the first positioning pin 6 protruding out of the outer surface of the moving block 4, and the first positioning pin 6 can penetrate through the first clamping plate 7 and be inserted into the first positioning hole. The first positioning pin 6 penetrates through the first clamping plate 7 and is inserted into the first positioning hole, which can limit the movement of the workpiece 9, so that the workpiece 9 is accurately positioned at the preset machining position, thereby ensuring that the drilling position conforms to the design requirements and improving the machining accuracy; when there is a positioning error of the workpiece 9, the first elastic element 5 can play a buffering role, which can avoid damage between the positioning pin and the positioning hole due to rigid collision, thereby prolonging the service life of the positioning pin and the positioning hole and reducing the maintenance cost of the clamp.

[0027] In some embodiments of the present embodiment, the second clamping plate 12 is provided with a second groove, and the second positioning pin 11 is arranged in the second groove. One end of the second positioning pin 11 protrudes from the outer wall surface of the second clamping plate 12 and can be inserted into the second positioning hole. The first positioning hole and the second positioning hole are coaxial. The coaxial positioning holes can effectively limit the movement of the workpiece 9 in the clamp, enhance the stability of the workpiece 9 in the clamp, prevent the workpiece 9 from shifting or shaking during processing, reduce processing errors caused by inaccurate positioning of the workpiece 9, and ensure the consistency of the processing precision of the workpiece 9.

[0028] In some embodiments of the present embodiment, the clamp further comprises a third clamping plate, the third clamping plate is provided with a third groove, and a third positioning pin is arranged in the third groove. The axis direction of the third positioning pin is perpendicular to the axis direction of the first positioning hole. One end of the third positioning pin protrudes from the outer wall surface of the third clamping plate and can be inserted into the third positioning hole. The insertion of the third positioning pin into the third positioning hole further limits the degrees of freedom of the workpiece 9 and provides an additional support point for the workpiece 9. This makes the workpiece 9 more stably maintain at the predetermined position when subjected to external forces during processing, thereby ensuring the processing precision of the workpiece 9.

[0029] In some embodiments of the present embodiment, the clamp further comprises a second elastic element 3. The second elastic element 3 is arranged between the moving block 4 and the cantilever. When the moving block 4 moves towards the second clamping plate 12, the second elastic element 3 can be compressed. When it is necessary to loosen the workpiece 9, the compressed second elastic element 3 can reset the moving block 4, so that the moving block 4 quickly returns to the initial position, thereby preparing for the next clamping operation and improving the working efficiency of the clamp.

[0030] In some embodiments of the present embodiment, the contact surfaces of the first clamping plate 7, the second clamping plate 12 and the third clamping plate with the workpiece 9 are all tooth-shaped surfaces. The design of the tooth-shaped surface can greatly increase the friction between the clamping plate and the workpiece 9. When the clamping plate clamps the workpiece, the tooth-shaped structure will be embedded into the surface of the workpiece 9, so that the workpiece 9 is less likely to shift when subjected to external forces, thereby ensuring that the workpiece 9 is stably fixed in the clamp.

[0031] In some embodiments of the present embodiment, the second positioning pin 11 is movably connected in the second groove, and a third elastic element is arranged between the second positioning pin 11 and the bottom surface of the second groove. The third positioning pin is movably connected in the third groove, and a fourth elastic element is arranged between the third positioning pin and the bottom surface of the third groove. When there is an alignment error between the positioning pin and the positioning hole, the elastic element can play a buffering role, thereby avoiding damage between the positioning pin and the positioning hole due to rigid collision. During the positioning operation, this protection mechanism can effectively prolong the service life of the positioning pin and the positioning hole.

[0032] In some embodiments of the present embodiment, a long hole is formed in the extrusion block 2, the first bolt passes through the clamp body and extends into the long hole, and the extrusion block 2 moves relative to the clamp body along the axis direction parallel to the rod body 1 through the long hole. The cooperation of the long hole and the first bolt provides precise linear motion guide for the extrusion block 2, so that the extrusion block 2 can only move along the axial direction of the long hole, and it is ensured that the extrusion block 2 can stably push the moving block 4 according to the predetermined direction, so that the driving action of the extrusion piece is more accurate.

[0033] In some embodiments of the present embodiment, a limiting piece is arranged at one end of the rod body 1, the limiting piece protrudes from the part of the rod body 1 passing through the extrusion block 2, and the limiting piece is used to drive the extrusion block 2 to move. The protruding design of the limiting piece makes it easier for the operator to exert force when rotating the rod body 1, improves the convenience of operation, and thus improves the work efficiency.

[0034] The principle and implementation mode of the present application are described by applying specific examples in the present application, and the above embodiment is only used to help understand the method and core idea of the present application; at the same time, for the general technical personnel in the field, according to the idea of the present application, the specific implementation mode and application range will be changed. In view of the above, the content of the present application should not be understood as a limitation of the present application.

Claims

1. A clamp characterized by: The utility model provides a clamping device, including the clamp body, first clamping plate, second clamping plate and drive mechanism, second clamping plate fixedly connected on the clamp body, first clamping plate can be movably connected on the clamp body and can be close to or far from second clamping plate, first clamping plate and second clamping plate between have the accommodating space for accommodating workpiece, be provided with first positioning pin on first clamping plate, be provided with second positioning pin on second clamping plate, and the side wall of workpiece is all seted up with positioning hole, first positioning pin and second positioning pin can all be inserted into one positioning hole to position workpiece put into the accommodating space, drive mechanism is connected on the clamp body, and drive mechanism can drive first clamping plate close to second clamping plate and make first clamping plate and second clamping plate clamp workpiece.

2. The clamp of claim 1, wherein: The drive mechanism includes a pressing piece and a moving block. The pressing piece includes a rod body and a pressing block. The pressing block is slidingly connected to the clamp body. The clamp body is provided with a threaded hole. The rod body passes through the pressing block and can rotate relative to the pressing block. One end of the rod body is threadedly connected to the threaded hole. The moving block is vertically movably connected to the clamp body and is fixedly connected to the first clamping plate above the first clamping plate. The pressing piece and / or the moving block has a pressing slope. In the direction close to the threaded hole, the distance from the pressing slope to the first clamping plate gradually increases. Rotating the rod body can drive the pressing block to press the moving block to move in the direction close to the second clamping plate.

3. The clamp of claim 2, wherein: The clamp body is fixedly connected with a cantilever. The cantilever is located below the pressing piece. The moving block is vertically movably connected to the cantilever. The cantilever is provided with a first recess on the side close to the first clamping plate. The first positioning pin is movably connected to the first recess. The first recess is provided with a first elastic element. The two ends of the first elastic element are in contact with the first positioning pin and the bottom surface of the first recess, respectively. The first positioning pin has a limiting portion for limiting the length of the end of the first positioning pin protruding from the outer surface of the moving block. The first positioning pin can pass through the first clamping plate and be inserted into the first positioning hole.

4. The clamp of claim 3, wherein: The second clamping plate is provided with a second recess. The second positioning pin is arranged in the second recess. One end of the second positioning pin protrudes from the outer surface of the second clamping plate and can be inserted into the second positioning hole. The first positioning hole and the second positioning hole are coaxially arranged.

5. The clamp of claim 4, wherein: The utility model also includes a third clamping plate. The third clamping plate is provided with a third recess. A third positioning pin is arranged in the third recess. The axis direction of the third positioning pin is perpendicular to the axis direction of the first positioning hole. One end of the third positioning pin protrudes from the outer surface of the third clamping plate and can be inserted into the third positioning hole.

6. The clamp of claim 3, wherein: The utility model also includes a second elastic element. The second elastic element is arranged between the moving block and the cantilever. The moving block can press the second elastic element when moving in the direction close to the second clamping plate.

7. The clamp of claim 5, wherein: The contact surfaces of the first, second and third clamping plates with the workpiece are all toothed surfaces.

8. The clamp of claim 5, wherein: The second positioning pin is movably connected in the second groove, and a third elastic element is arranged between the second positioning pin and the bottom surface of the second groove; the third positioning pin is movably connected in the third groove, and a fourth elastic element is arranged between the third positioning pin and the bottom surface of the third groove.

9. The clamp of claim 2, wherein: A long hole is formed in the extrusion block, a first bolt passes through the clamp body and extends into the long hole, and the extrusion block moves relative to the clamp body along an axis direction parallel to the rod body through the long hole.

10. The clamp of claim 2, wherein: A limiting piece is arranged at one end of the rod body, the limiting piece protrudes from the part of the rod body that passes through the extrusion block, and the limiting piece is used to drive the extrusion block to move.

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