A gripping mechanism for simultaneously gripping two workpieces

Abstract

The utility model relates to a kind of clamping mechanism of simultaneously clamping two workpieces, and it is related to workpiece clamping technical field, including clamping main body, first clamping component capable of clamping workpiece one is equipped on it, and second clamping component capable of clamping workpiece two is equipped on the outside of workpiece one, second clamping component includes two clamping blocks oppositely arranged and can be opened and closed, the opposite side of two clamping blocks is rotatably provided with abutting block, at least one side of abutting block protrudes the clamping block, and protruding portion is located between two clamping blocks, and two are spaced apart on the abutting block of same clamping block, limiting slot is further provided on clamping block, part of abutting block is located in limiting slot, and limiting slot is arranged as the rotating angle of abutting block can be limited. Its abutting block can adjust clamping angle adaptively with the shape (rectangular or cylindrical) of workpiece two, break through traditional limitation, improve adaptability;Double abutting block interval layout can be clamped workpiece two both sides to improve clamping stability;Limiting slot prevents excessive rotation of abutting block, and clamping stability can be ensured controllable.

Description

Technical Field

[0001] This utility model relates to the field of workpiece clamping technology, specifically a clamping mechanism that can clamp two workpieces simultaneously. Background Technology

[0002] Existing clamping mechanisms for simultaneously holding two types of workpieces generally suffer from the drawback of being unable to simultaneously meet the clamping requirements of rectangular and cylindrical workpieces. For example, the robotic arm disclosed in patent CN211993031U, although equipped with a clamping body 10 and two pairs of grippers on the clamping body 10 to respectively clamp workpiece A and workpiece B sleeved on the outside of workpiece A, has two opposing grippers for clamping workpiece B: a second left gripper 40 and a second right gripper 50. Both the second left gripper 40 and the second right gripper 50 have V-shaped grooves. Such V-shaped grooves can only achieve stable clamping by fitting the opposite sides of the cylindrical workpiece B. If facing a rectangular workpiece, it is difficult to form a suitable clamping and positioning structure, which cannot guarantee the clamping reliability. Ultimately, this limits the applicable scenarios of such clamping mechanisms. Summary of the Invention

[0003] To address the technical problems existing in the background art, this utility model provides a clamping mechanism that can simultaneously clamp two workpieces.

[0004] The technical solution of this utility model is as follows: A clamping mechanism for simultaneously clamping two workpieces includes a clamping body, on which a first clamping component capable of clamping workpiece one, and a second clamping component capable of clamping workpiece two sleeved on the outside of workpiece one.

[0005] The gripping body and the first gripping component are existing technologies, such as the robotic arm disclosed in patent CN211993031U that can grip two workpieces at the same time. The structure and implementation principle of the gripping body and the first gripping component are the same as the rest of the structure in the patent except for the second left gripper and the second right gripper, and will not be described in detail here.

[0006] As the core technical concept of this utility model, the second clamping component includes two clamping blocks that are arranged opposite to each other and can be opened and closed. Each clamping block has a rotatable abutment block on its opposite side. At least one side of the abutment block protrudes from the clamping block and the protruding part is located between the two clamping blocks. Two abutment blocks are spaced apart on the same clamping block. A limiting groove is also provided on the clamping block. Part of the abutment block is located in the limiting groove, and the limiting groove is configured to limit the rotation angle of the abutment block.

[0007] As one implementation method, one side of the clamping block protruding from the clamping block is a plane.

[0008] To ensure a smooth clamping process, clearance grooves are provided in the middle of the opposite sides of the two clamping blocks, and the two abutting blocks on the same clamping block are located at the two ends of the clearance grooves.

[0009] To enhance the durability and clamping stability of the clamping block, a limiting groove is provided in the middle of the clamping block, with the opening facing the other clamping block.

[0010] Specifically, the limiting groove includes an outward-facing arc-shaped segment and an inclined segment and a horizontal segment connected to it in sequence.

[0011] Furthermore, the clamping block has a polygonal structure and is detachably connected to the clamping block it belongs to.

[0012] Furthermore, the clamping block is made of polyurethane A90, and its thickness is 1 / 3 to 2 / 3 of the clamping block's thickness, and not less than 5mm.

[0013] As one implementation, the clamping body includes two connecting rods that are arranged opposite to each other and can drive the two clamping blocks to open and close. The two clamping blocks are respectively connected to the two connecting rods through two sets of adjustment components. The adjustment components are configured to adjust the clamping height of the clamping blocks, and the sides of the two clamping blocks that are opposite to each other are detachably connected to the two adjustment components respectively.

[0014] The beneficial effects of this utility model are as follows: through the combined design of clamping blocks, rotatable abutment blocks, and limiting grooves, on the one hand, the abutment blocks can adaptively adjust their rotation angle according to the shape of the workpiece (rectangular or cylindrical), and the protruding side can adaptively fit against the outer wall of the workpiece, breaking through the limitation of traditional clamping mechanisms that can only adapt to workpieces of a single shape, and greatly improving the adaptability of the mechanism to workpieces of different shapes; on the other hand, the spaced arrangement of the double abutment blocks can form a stable clamping from both sides of the workpiece, avoiding workpiece displacement caused by single-point clamping, while the limiting grooves precisely limit the rotation range of the abutment blocks, preventing excessive rotation of the abutment blocks from causing clamping failure, ensuring stable and controllable clamping action, and ultimately enhancing the clamping stability and operational reliability of the clamping mechanism. Attached Figure Description

[0015] In the attached diagram: Figure 1 This is a front view (clamping state) of a clamping mechanism that simultaneously clamps two workpieces in this embodiment. Figure 2 This is a schematic diagram of the clamping structure of the second clamping component in this embodiment. Figure 1 (A schematic diagram of the AA section; workpiece two is a cylindrical part). Figure 3 This is a top view of the clamping block in this embodiment; Figure 4 for Figure 3 Schematic diagram of the lateral structure of the middle clamping block; Figure 5This is a schematic diagram of another clamping structure of the second clamping component in this embodiment (workpiece two is a rectangular piece); The components represented by the various reference numerals in the diagram are: 10. Clamping body; 20. Left connecting rod; 30. Right connecting rod; 40. Second left gripper; 50. Second right gripper; 60. Workpiece one; 70. Workpiece two; 11. Connecting rod; 12. Adjusting rod; 13. Clamping block; 131. Arc-shaped section; 132. Inclined section; 133. Horizontal section; 134. Clearance groove; 14. Clamping block. Detailed Implementation

[0016] Example 1 Combination Figure 1 This embodiment provides a clamping mechanism for simultaneously clamping two workpieces, including a clamping body 10, on which a first clamping component capable of clamping workpiece 60 and a second clamping component capable of clamping workpiece 70 sleeved on the outside of workpiece 60 are provided. Specifically, the clamping mechanism in this embodiment is vertically arranged, with workpiece 70 sleeved on the outside of workpiece 60 and the upper end of workpiece 60 protruding from the upper end of workpiece 70. The first clamping component of the clamping mechanism in this embodiment clamps the outer side of the protruding upper part of workpiece 60, and the second clamping component clamps the outer side of the middle position of workpiece 70 in the length direction.

[0017] Specifically, in this embodiment, the gripping body 10 and its first gripping component both adopt existing technologies, combined with... Figure 1 The structure and implementation principle of the gripping body 10 and the first gripping component disclosed in the patent with publication number CN211993031U are the same as the structure of the above-mentioned patent except for the second left gripper 40 and the second right gripper 50. Since it is not the core inventive point of this application, those skilled in the art can also clearly understand the structure and usage principle of the gripping body 10 and the first gripping component on it in this embodiment by combining with the prior art, so it will not be described in detail here.

[0018] Combination Figure 1 and Figure 2 The core invention of the clamping mechanism in this embodiment lies in the structural design of the second clamping component. Specifically, the second clamping component includes two clamping blocks 13 that are arranged opposite to each other and can be opened and closed. Each clamping block 13 has a rotatable abutment block 14 on its opposite side. At least one side of the abutment block 14 protrudes from the clamping block 13, and the protruding part is located between the two clamping blocks 13. Two abutment blocks 14 are spaced apart on the same clamping block 13. A limiting groove is also provided on the clamping block 13. Part of the abutment block 14 is located in the limiting groove, and the limiting groove is designed to limit the rotation angle of the abutment block 14.

[0019] To further ensure the reliability of the clamping action, one side of the clamping block 14 protruding from the clamping block 13 is flat. This design not only enables stable clamping when clamping cylindrical workpieces 70, but also utilizes the included angle formed by the protruding sides of the two clamping blocks 14, similar to a V-shaped positioning structure, to conform to the curved surface of the cylinder (see...). Figure 2 Furthermore, when clamping a rectangular workpiece 70, the two planes formed by the protruding sides of the two clamping blocks 14 can be made to fit against the plane of the rectangular workpiece 70 (see...). Figure 5 By using surface contact, the clamping reliability is ensured, preventing the rectangular workpiece from sliding during the clamping process, thereby ensuring the reliability of the clamping action.

[0020] Combination Figure 3 To ensure smooth clamping, clearance grooves 134 are provided in the middle of opposite sides of the two clamping blocks 13. Two abutting blocks 14 on the same clamping block 13 are located at both ends of the clearance grooves 134. The clearance grooves 134 can effectively avoid the central protrusion of cylindrical workpieces 70 (see...). Figure 5 This avoids rigid interference between the clamping block 13 and the workpiece 70, ensuring a smooth clamping process. At the same time, the clamping block 14 clamps the workpiece 70 from both ends of the relief groove 134, forming a symmetrical clamping force distribution. This effectively prevents the workpiece 70 from tilting due to uneven force, and is especially suitable for long workpieces 70.

[0021] Combination Figure 4 The clamping block 14 is located in the limiting groove, which is opened in the middle of the clamping block 13 and faces the other clamping block 13. This design ensures that only the middle part of the clamping block 14 protrudes and contacts the workpiece 2 70, and the force is concentrated in the middle area of ​​the workpiece 2 70. This design can avoid local stress concentration caused by uneven load on the clamping block 14, reduce wear or deformation, and ensure uniform distribution of clamping force. This not only improves the durability of the clamping block 14, but also enhances the clamping stability.

[0022] Specifically, the clamping block 14 is made of polyurethane A90 material, which has both high elasticity and suitable hardness. The clamping block 14 has a polygonal structure and is detachably connected to the clamping block 13, so that the clamping block 14 has multiple sides with different angles. By changing different sides, it can be set to contact the workpiece. At the same time, the detachable connection method makes it easy to quickly replace the clamping block 14 according to the workpiece specifications or the wear of the protruding side, so that different sides can be used as protruding sides to contact the workpiece. This eliminates the need to replace the entire clamping block 13 after a single damage, thus reducing the maintenance cost of the clamping block 14.

[0023] In a preferred embodiment, the clamping block 14 is a rectangular block structure with four planar sides. The clamping block 14 is provided with through holes, and the clamping block 13 is provided with threaded holes corresponding to the through holes. The bolt passes through the threaded hole on the upper side of the clamping block 13, the through hole, and the threaded hole on the lower side of the clamping block 13 in sequence, and is screwed into the threaded hole to fix the clamping block 14 in the limiting groove of the clamping block 13.

[0024] The thickness of the clamping block 14 is 1 / 3 to 2 / 3 of the thickness of the clamping block 13, and not less than 5mm. This ensures that it has sufficient structural strength to withstand the clamping force and effectively avoids the risk of deformation or breakage caused by excessive thickness. It also avoids reducing the additional load on the clamping body 10 due to excessive thickness.

[0025] Combination Figure 3 The limiting groove includes an outward-facing arc-shaped segment 131 and an inclined segment 132 and a horizontal segment 133 connected to it in sequence. Through this three-segment combination design, the center of the arc-shaped segment 131 coincides with the rotation axis of the clamping block 14, and its radius is larger than the rotation radius of the clamping block 14. The inclined segment 132 allows the plane of the clamping block 14 to form an angle with the inclined surface, adapting to the curved contour of the cylindrical workpiece (see...). Figure 2 This achieves stable positioning; the horizontal segment 133 is fully fitted with the plane of the clamping block 14, adapting to the planar clamping requirements of rectangular workpieces (see...). Figure 5 ).

[0026] When clamping a workpiece, the rotational characteristics of the rectangular clamping block 14 allow it to adaptively fit both rectangular and cylindrical workpieces. For cylindrical workpieces, the included angle formed by adjacent sides of the polygon, similar to a V-shaped positioning structure, conforms to the cylindrical curved surface to achieve stable clamping. For rectangular workpieces, rotating the clamping block 14 allows the flat side to form surface contact with the workpiece plane, ensuring clamping reliability. At the same time, the spaced arrangement of the double clamping blocks 14 can form symmetrical clamping from both sides of the workpiece, avoiding offset caused by single-point clamping. The limiting groove precisely limits the rotation range of the clamping block 14, preventing excessive rotation from causing positioning failure. Ultimately, the same clamping component can simultaneously adapt to two types of workpieces, solving the problem of the narrow applicability of existing mechanisms and significantly improving clamping stability and operational reliability.

[0027] Example 2 For gripping a long workpiece 70, clamping the middle part along its length is the key to ensuring clamping stability. Therefore, this embodiment provides a structure for the second clamping assembly in embodiment 1 that can adjust the clamping height of the two clamping blocks 13 to further improve the adaptability of the clamping mechanism.

[0028] Combination Figure 1The clamping body 10 includes two connecting rods 11 that are arranged opposite to each other and can drive the two clamping blocks 13 to open and close. The connection structure between the two connecting rods 11 and the clamping body 10 corresponds to the left connecting rod 20 and the right connecting rod 30 in the patent described in Embodiment 1 above. The two clamping blocks 13 are respectively connected to the two connecting rods 11 through two sets of adjustment components. The adjustment components are configured to adjust the clamping height of the clamping blocks 13. The sides of the two clamping blocks 13 that are opposite to each other are detachably connected to the two adjustment components respectively.

[0029] Specifically, the adjustment assembly includes a fixed block on the connecting rod 11 and an adjustment rod 12 arranged parallel to the connecting rod 11. The adjustment rod 12 passes through the fixed block and is helically connected to it. The clamping block 13 is detachably connected to the adjustment rod 12 through a connecting block. The clamping height of the clamping block 13 can be adjusted by rotating the adjustment rod 12. In order to improve the stability of the adjustment rod 12, a guide block is also provided on the connecting rod 11 near the clamping block 13. The adjustment rod 12 passes vertically through the guide block and is helically connected to it.

Claims

1. A clamping mechanism for simultaneously clamping two workpieces, comprising a clamping body (10), wherein a first clamping assembly capable of clamping workpiece one (60) is provided thereon, and a second clamping assembly capable of clamping workpiece two (70) sleeved on the outside of workpiece one (60), characterized in that: The second clamping assembly includes two clamping blocks (13) that are arranged opposite to each other and can be opened and closed, and abutting blocks (14) are rotatably provided on opposite sides of the two clamping blocks (13). The abutting block (14) protrudes from at least one side of the clamping block (13), and the protruding part is located between the two clamping blocks (13), and two abutting blocks (14) are provided at intervals on the same clamping block (13); The clamping block (13) is also provided with a limiting groove, and part of the abutting block (14) is located in the limiting groove. The limiting groove is configured to limit the rotation angle of the abutting block (14).

2. The clamping mechanism for simultaneously clamping two workpieces as described in claim 1, characterized in that, The side of the clamping block (14) that protrudes from the clamping block (13) is a plane.

3. The clamping mechanism for simultaneously clamping two workpieces as described in claim 1, characterized in that, The two clamping blocks (13) have a relief groove (134) in the middle of opposite sides, and the two abutting blocks (14) on the same clamping block (13) are located at both ends of the relief groove (134).

4. The clamping mechanism for simultaneously clamping two workpieces as described in claim 1, characterized in that, The limiting groove is located in the middle of the clamping block (13) and the opening faces the other clamping block (13).

5. The clamping mechanism for simultaneously clamping two workpieces as described in claim 1, characterized in that, The limiting groove includes an outward-facing arc-shaped segment (131) and an inclined segment (132) and a horizontal segment (133) connected thereto in sequence.

6. The clamping mechanism for simultaneously clamping two workpieces as described in claim 1, characterized in that, The clamping block (14) has a polygonal structure and is detachably connected to the clamping block (13).

7. A clamping mechanism for simultaneously clamping two workpieces as described in claim 1, characterized in that, The material of the clamping block (14) is polyurethane A90.

8. A clamping mechanism for simultaneously clamping two workpieces as described in claim 7, characterized in that, The thickness of the clamping block (14) is 1 / 3 to 2 / 3 of the thickness of the clamping block (13), and not less than 5 mm.

9. A clamping mechanism for simultaneously clamping two workpieces as described in any one of claims 1-8, characterized in that, The clamping body (10) includes two connecting rods (11) that are arranged opposite to each other and can drive the two clamping blocks (13) to open and close. The two clamping blocks (13) are respectively connected to the two connecting rods through two sets of adjustment components, and the adjustment components are configured to adjust the clamping height of the clamping blocks (13).

10. A clamping mechanism for simultaneously clamping two workpieces as described in claim 9, characterized in that, The two clamps (13) are detachably connected to the two adjustment components on opposite sides.

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