Clamp for clamping workpiece

Abstract

A clamp for clamping a workpiece comprises a base, a pushing assembly and an abutting portion, the pushing assembly comprises a base block, an L-shaped mounting plate, a movable wrench, a movable plug pin, an abutting structure and a connecting piece, the axis of the movable plug pin is parallel to the horizontal plane, and the axis of the movable plug pin is parallel to the horizontal plane. The abutting structure comprises a mounting plate arranged at the tail end of the movable bolt, at least one abutting column vertically arranged on the mounting plate, and an abutting head arranged at the tail end of the abutting column. According to the clamp for clamping the workpiece, the movable wrench is arranged, the movable plug pin is hinged to one end of the movable wrench, the abutting structure is arranged at the tail end of the movable plug pin, the movable wrench controls the abutting structure to move, the workpiece is clamped between the abutting structure and the abutting part, and therefore the workpiece is clamped between the movable wrench and the abutting part. Therefore, the workpiece is clamped.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of clamps, especially a clamp for clamping workpieces. BACKGROUND

[0002] With the continuous development of injection molding process, the shape of the workpiece formed by injection molding is also more and more, but the workpiece after injection molding also needs to be sprayed on the surface of the pattern, so as to play the prompting role or increase the beauty of the workpiece, and the workpiece needs to be clamped in the same direction during spraying, so that the position of the pattern is unified and accurate.

[0003] The existing clamping device has some problems when in use, because the workpiece itself has a certain arc shape, when the clamping part of the clamping device contacts the arc part, it is easy to cause the arc to deform or break, and the existing clamping device cannot be suitable for workpieces of various sizes, when the size of the workpiece changes, the position of the arc-shaped protrusion on the surface will also change, and every time the workpiece of different size is replaced, the clamping part needs to be replaced as a whole, so as to ensure the stability of clamping. SUMMARY

[0004] Therefore, the utility model provides a clamp for clamping workpieces to solve the above problems.

[0005] A clamp for clamping workpieces, comprising a base, a pushing assembly arranged on the top of the base, and an abutting portion arranged on the top of the base and spaced from the pushing assembly. The pushing assembly comprises a base block arranged on the top of the base, an L-shaped mounting plate arranged on the top of the base block, a movable wrench hinged to the L-shaped mounting plate, a movable pin movably inserted into the L-shaped mounting plate, an abutting structure arranged at the end of the movable pin, and a connecting piece hinged to the movable wrench and the movable pin at both ends. The movable wrench rotates in the horizontal plane to pull the movable pin to move along the axis direction. The axis of the movable pin is parallel to the horizontal plane, the abutting structure comprises an installation plate arranged at the end of the movable pin, at least one abutting column arranged vertically on the installation plate, and an abutting head arranged at the end of the abutting column, the end of the abutting head is tapered, the abutting portion comprises a base block, and at least one positioning ring arranged on the side of the base block facing the abutting interface, the number of the positioning rings is not less than the number of the abutting columns, each abutting column is positionally corresponding to a positioning ring, and the movable wrench drives the movable pin to move after rotation, so that the abutting head approaches or moves away from the positioning ring.

[0006] Further, the L-shaped mounting plate comprises a mounting plate body, a positioning cylinder vertically arranged on one side of the mounting plate body, and a hinge column vertically arranged on the other side of the mounting plate body, the movable bolt is sleeved in the positioning cylinder, and the movable wrench is sleeved on the hinge column.

[0007] Further, the mounting plate body comprises a horizontal base plate and a vertical stand plate arranged at one end of the base plate, the hinge is arranged on the base plate, and the positioning cylinder is arranged on the stand plate.

[0008] Further, a side of the base plate away from the stand plate is provided with a stop edge, and a middle portion of the stand plate protrudes away from the base plate to form an arc shape.

[0009] Further, the connecting piece is V-shaped, and the V-shaped two ends of the connecting piece are respectively hinged with the movable wrench and the movable bolt.

[0010] Further, opposite sides of the base are respectively provided with a handle slot.

[0011] Further, the abutting portion comprises a base block and a plurality of positioning rings arranged on the base block, the positioning rings are arranged on a side of the base block facing the pushing assembly, and each abutting head is opposite to the position of one positioning ring.

[0012] Compared with the prior art, the clamp for clamping workpieces provided by the utility model clamps the workpiece between the abutting structure and the abutting part through the abutting structure and the abutting head of the movable spanner, the abutting area of the abutting head is small, the abutting structure is detachable, the abutting head in different positions can be arranged to avoid the arc-shaped part of the workpiece, thus the workpiece can be clamped without deformation or even crushing, the abutting structure is detachable, the abutting structure with different distribution positions and number of abutting columns can be selected according to the shape of the workpiece and the distribution position of the arc-shaped part, thus the abutting column cannot be clamped in the arc-shaped part, the distribution of the abutting column can clamp the workpiece, and the clamp is suitable for workpieces of different sizes and shapes, and the application range of the clamp is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The structure diagram of the clamp for clamping workpieces provided by the utility model is shown.

[0014] Figure 2 The structure diagram of the clamp for clamping workpieces provided by the utility model is shown. Figure 1 The top view of the clamp for clamping workpieces provided by the utility model is shown.

[0015] Figure 3 The structure diagram of the clamp for clamping workpieces provided by the utility model is shown. Figure 1 The structure diagram of the L-shaped mounting plate of the clamp for clamping workpieces provided by the utility model is shown. DETAILED DESCRIPTION

[0016] The specific embodiments of the utility model will be further described below. It should be understood that the description of the embodiments of the utility model herein is not used to limit the protection scope of the utility model.

[0017] As Figures 1 to 3As shown, it is the structure schematic view of the clamp for clamping workpiece provided by the utility model. The clamp for clamping workpiece comprises a base 10, a pushing assembly 20 arranged on the top of the base and an abutting portion 30 arranged on the top of the base 10 and abutting with the pushing assembly 20. The clamp for clamping workpiece further comprises other functional modules, such as the connecting structure arranged on the base 10 for fixing the base 10 on the surface of the operation table and the like, which should be the technology known by the person skilled in the art and will not be described in detail one by one.

[0018] The base 10 is used for providing the mounting position for the pushing assembly 20 and the abutting portion 30. The base 10 is symmetrically provided with a handle slot 11 on both sides, so as to facilitate the user to respectively insert hands into the handle slot 11 to lift the whole device, so as to facilitate carrying.

[0019] The pushing assembly 20 comprises a base block 21 arranged on the top of the base 10, an L-shaped mounting plate 22 arranged on the top of the base block 21, a movable wrench 23 hinged on the L-shaped mounting plate 22, a movable bolt 24 movably inserted on the L-shaped mounting plate 22, an abutting structure 25 arranged at the end of the movable bolt 24 and a connecting piece 26 hinged between the movable bolt 24 and the movable wrench 23.

[0020] The base block 21 is used for raising the height of the movable bolt 24, so that the movable bolt 24 can match the positioning ring 32 below, thereby clamping the workpiece. The base block 21 is a detachable structure, and the base block 21 with appropriate height can be selected according to the size of the workpiece.

[0021] The L-shaped mounting plate 22 provides the mounting position for the movable wrench 23 and the movable bolt 24. The L-shaped mounting plate 22 comprises an installation plate body 221, a positioning cylinder 222 vertically arranged on one side of the installation plate body 221 and a hinge column 223 vertically arranged on the other side of the installation plate body 221.

[0022] The axis of the positioning cylinder 222 is parallel to the top surface of the base 10, and the hinge column 223 is perpendicular to the base 10. The mounting plate body 221 is L-shaped, and includes a horizontal base plate 224 and a vertical stand plate 225 arranged on the top of the base plate 224. The hinge column 223 is mounted on the base plate 224, and the positioning cylinder 222 is mounted on the stand plate 225. The base plate 224 is detachably connected to the base block 21 by bolts. The side of the base plate 224 away from the stand plate 225 is vertically provided with a baffle 226, so as to protect the hinge column 223. The top of the baffle 226 is lower than the bottom of the movable spanner 23. The middle of the stand plate 225 protrudes outward, so that the stand plate 225 is arc-shaped. The arc-shaped structure can increase the protection range of the movable bolt 24. The positioning cylinder 222 is a cylindrical structure arranged on the side of the stand plate 225 away from the base plate 224, and is used for inserting and guiding the movement direction of the movable bolt 24. The hinge column 223 is used for providing a mounting position for the movable spanner 23.

[0023] The movable spanner 23 is hinged on the hinge column 223, and in use, the movable spanner 23 can be rotated, so that the connecting piece 26 can drive the abutting structure 25 to move. The movable bolt 24 is cylindrical. The connecting piece 26 is V-shaped, and the two ends of the connecting piece 26 are respectively hinged with the movable bolt 24 and the movable spanner 23. When the movable spanner 23 rotates, it will pull the connecting piece 26, and then drive the movable bolt 24 to move.

[0024] The abutting structure 25 is detachably arranged at the end of the movable bolt 24. According to the shape and size of the workpiece, the abutting structure 25 with different number of abutting heads 253 can be selected and matched with the positioning ring 32 at different positions of the abutting block 30 to ensure that the workpiece can be clamped. In the embodiment, the abutting structure 25 is screw-mounted at the end of the movable bolt 24, so as to facilitate disassembly. In actual use, the abutting structure 25 and the movable bolt 24 can be detachably connected by using a pin to pin the abutting structure 25 to the side wall of the movable bolt 24. The abutting structure 25 comprises a fixed plate 251 fixedly arranged at the end of the movable bolt 24, at least one abutting column 252 inserted into the fixed plate 241, and an abutting head 253 arranged at the end of the abutting column 252. The end of the abutting head 253 is tapered, so that the abutting head 253 is in the shape of a circular truncated cone as a whole. The cross-sectional radius of the end of the abutting head 253 is smaller than the inner wall radius of the positioning ring 32, so that when the abutting head 253 abuts on the workpiece, the workpiece will be deformed to form a circular protrusion at the position of force due to the elasticity of the plastic material of the workpiece. The deformed part will be clamped in the positioning ring 32, so that the workpiece can be stably clamped by the positioning ring 32 and the abutting head 253.

[0025] The abutting part 30 comprises a base block 31 and a plurality of positioning rings 32 arranged on the side of the base block 31 facing the pushing assembly 20. The base block 31 is detachably arranged, so that different base blocks 31 can be replaced as needed to adapt to workpieces of different sizes and shapes. The positioning ring 32 is used to abut with the abutting head 253. The end face radius of the abutting head 253 is greater than the inner wall radius of the positioning ring 32 and smaller than the outer wall radius of the positioning ring 32, so as to ensure that the abutting head 253 can abut with the positioning ring 32. The inner wall of the positioning ring 32 is funnel-shaped, and a bolt passes through the positioning ring 32 to clamp the positioning ring 32 on the base block 31. A plurality of mounting holes for bolt mounting are reserved on the base block 31. By selectively disassembling the positioning rings 32 at different positions and matching with different.

[0026] In use, according to the shape of the workpiece, a suitable abutting structure 25 is selected, so that one side of the relatively flat position on the workpiece is provided with an abutting head 253, and the position corresponding to the abutting head 253 on the base block 31 is provided with the positioning ring 32, so that each abutting head 253 can abut with a positioning ring 32. After the operator places the workpiece between the abutting structure 25 and the abutting part 30, one hand rotates the movable wrench 23 to control the abutting head 253 to approach the workpiece and finally clamp the workpiece. The operator adjusts the tightness of the clamping by rotating the movable wrench 23, and under the condition of skilled operation, it is difficult to appear that the workpiece is clamped and deformed or loose, which improves the stability of clamping. When replacing workpieces of different sizes or shapes, the operator replaces different abutting structures 25, so that the position of the abutting head 253 avoids the arc-shaped part of the workpiece that is not easy to clamp, and the position of the positioning ring 32 on the base block 31 is adjusted to correspond to the abutting head 253, thereby realizing stable clamping.

[0027] Compared with the prior art, the clamp for clamping a workpiece provided by the utility model clamps the workpiece between the abutting structure 25 and the abutting part 30 by arranging the movable wrench 23, hinging an activity bolt 24 at one end of the movable wrench 23, arranging an abutting structure 25 at the end of the activity bolt 24, controlling the abutting structure 25 to move by the movable wrench 23, and clamping the workpiece, so that the workpiece is clamped. The abutting structure 25 comprises a fixed plate 251 detachably arranged at the end of the activity bolt 24, at least one abutting column 252 inserted into the fixed plate 251, and an abutting head 253 arranged at the end of each abutting column 252. Specifically, a plurality of positioning rings 32 are detachably arranged on the abutting part 30, each abutting head 253 corresponds to a positioning ring 32 in position, so that the workpiece between them can be clamped. The abutting head 253 and the positioning ring 32 are used to clamp the workpiece. Since the abutting area of the abutting head 253 is small and the abutting structure 25 is a detachable structure, the abutting head 253 can be arranged at different positions to avoid the arc-shaped part of the workpiece, so that the workpiece is not clamped, deformed or even crushed. Since the abutting structure 25 is a detachable structure, only the abutting structure 25 needs to be replaced, the abutting structure 25 with different distribution positions and numbers of abutting columns 252 can be selected according to the shape of the workpiece and the distribution position of the arc-shaped part, so that the abutting column 252 is not clamped in the arc-shaped part, and the distribution of the abutting column 252 can clamp the workpiece, thereby being suitable for workpieces of different sizes and shapes, and improving the application range of the clamp.

[0028] The above merely is the preferred embodiment of the present application, and is not used for limiting the protection scope of the present application, and any modification, equivalent replacement or improvement etc. within the spirit of the present application are all covered in the claim scope of the present application.

Claims

1. A fixture for clamping a workpiece, characterized by: The clamp for clamping workpieces comprises a base, a pushing assembly arranged on the top of the base, and an abutting part arranged on the top of the base and spaced from the pushing assembly, the pushing assembly comprises a base block arranged on the top of the base, an L-shaped mounting plate arranged on the top of the base block, a movable wrench hinged on the L-shaped mounting plate, a movable bolt movably inserted into the L-shaped mounting plate, an abutting structure arranged at the end of the movable bolt, and a connecting piece hinged at both ends of the movable wrench and the movable bolt, the movable wrench rotates in the horizontal plane to pull the movable bolt to move along the axis, the axis of the movable bolt is parallel to the horizontal plane, the abutting structure comprises a mounting plate arranged at the end of the movable bolt, at least one abutting column arranged vertically on the mounting plate, and an abutting head arranged at the end of the abutting column, the end of the abutting head is tapered, the abutting part comprises a base block, and at least one positioning ring arranged on the side of the base block facing the abutting interface, the number of the positioning rings is not less than the number of the abutting columns, each abutting column corresponds to a positioning ring in position, the movable wrench drives the movable bolt to move after rotation, so that the abutting head approaches or moves away from the positioning ring.

2. The fixture for clamping a workpiece of claim 1, wherein: The L-shaped mounting plate comprises a mounting plate body, a positioning cylinder arranged vertically on one side of the mounting plate body, and a hinge column arranged vertically on the other side of the mounting plate body, the movable bolt is sleeved in the positioning cylinder, and the movable wrench is sleeved on the hinge column.

3. The fixture for clamping a workpiece of claim 2, wherein: The mounting plate body comprises a base plate arranged horizontally, and a stand plate arranged vertically on one end of the base plate, the hinge is located on the base plate, and the positioning cylinder is located on the stand plate.

4. The fixture for clamping a workpiece of claim 3, wherein: A stop edge is arranged on the side of the base plate away from the stand plate, and the middle part of the stand plate protrudes away from the base plate to form an arc shape.

5. The fixture for clamping a workpiece of claim 2, wherein: The connecting piece is V-shaped, and the V-shaped ends of the connecting piece are hinged with the movable wrench and the movable bolt, respectively.

6. The fixture for clamping a workpiece of claim 1 wherein: Opposite sides of the base are respectively provided with a handle slot.

7. The fixture for clamping a workpiece of claim 1 wherein: The abutting part comprises a base block and a plurality of positioning rings arranged on the base block, the positioning rings are located on the side of the base block facing the pushing assembly, and each abutting head corresponds to a positioning ring in position.

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