Clamp for machining shaft pin part

Abstract

The utility model discloses a shaft pin part machining clamp which comprises a U-shaped frame, a sleeve pipe is fixedly installed on the top of the U-shaped frame, three cavities are formed in the surface of the sleeve pipe in an annular array mode, rotatable clamping jaws are arranged in inner cavities of the cavities, the top of an inner cavity of the U-shaped frame is fixedly connected with a fixing pipe, and the fixing pipe is fixedly connected with the top of the inner cavity of the U-shaped frame. An inner cavity of the fixing pipe is rotationally connected with a threaded pipe, an inner cavity of the threaded pipe is in threaded connection with a threaded rod, and the top of the threaded rod is fixedly connected with a frustum block. The shaft pin is inserted into the inner cavity of the sleeve pipe, then the threaded pipe is operated to rotate, the threaded rod moves upwards due to threads, the threaded rod drives the frustum block to move upwards, the frustum block pushes the clamping jaws to rotate with the rotating shaft as the axis through the arc-shaped block, and the tops of the three clamping jaws gather towards the middle to achieve centering fixing of the shaft pin. Therefore, the tubular opening is matched with the three rotating clamping jaws, and the purpose of clamping the shaft pin part in the middle is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of shaft pin parts processing technology, and in particular relates to a fixture for processing shaft pin parts. Background Technology

[0002] A pivot pin is a standardized fastener mainly used to form a hinge connection between two parts. It can also be used for positioning and fastening parts. It is widely used in the mechanical field and is commonly used for connecting and positioning parts in products such as automobiles, motorcycles, construction machinery, and home appliances. Examples include the connection between shafts and gears in automobile transmissions and the hinge parts of windshield wipers.

[0003] The machining of shaft pins requires the use of fixtures. Some fixtures use a single clamping method, such as clamping the shaft pin from only one side, which may cause uneven force on the shaft pin, resulting in skewing during machining and affecting machining accuracy. Therefore, we designed a fixture for machining shaft pin parts. The tubular opening is combined with three rotating jaws to achieve centered clamping of the shaft pin parts. Utility Model Content

[0004] The purpose of this utility model is to provide a fixture for machining shaft pin parts, which has a tubular opening and three rotating jaws, achieving the advantage of centrally clamping the shaft pin parts, thereby solving the above-mentioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A fixture for machining shaft pin parts includes a U-shaped frame, a sleeve tube fixedly installed on the top of the U-shaped frame, three cavities arranged in a ring array on the surface of the sleeve tube, a rotatable gripper provided in the inner cavity of the cavity, a fixed tube fixedly connected to the top of the inner cavity of the U-shaped frame, a threaded tube rotatably connected to the inner cavity of the fixed tube, a threaded rod threadedly connected to the inner cavity of the threaded tube, a frustum block fixedly connected to the top of the threaded rod, and an arc-shaped block adapted to the frustum block provided at the bottom of the inner side of the gripper.

[0006] Preferably, the cavity is equipped with a rotating shaft, and the gripper is rotatably connected to the surface of the rotating shaft.

[0007] Preferably, an annular edge is fixedly connected to the top of the surface of the threaded tube, and an annular groove is provided in the inner cavity of the fixed tube for the annular edge to rotate.

[0008] Preferably, the top of the U-shaped frame is provided with a circular hole for the movement of the annular groove, and guide strips are fixedly connected to both sides of the inner cavity of the circular hole and both sides of the inner cavity of the fixed tube. Two guide grooves that slide on the surface of the guide strips are provided on the surface of the truncated cone block.

[0009] Preferably, a hand-tightening block is fixedly installed at the bottom of the threaded tube.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model inserts the shaft pin into the inner cavity of the sleeve tube, then operates the threaded tube to rotate, and the threaded rod moves upward due to the thread. The threaded rod drives the frustum block to move upward, and the frustum block pushes the jaws to rotate around the rotating shaft through the arc block. The tops of the three jaws converge towards the middle to fix the shaft pin in the center. This achieves the purpose of centrally clamping the shaft pin by cooperating with the tubular opening and the three rotating jaws.

[0012] 2. This utility model, through the combined use of guide groove and guide strip, can guide and limit the movement of the frustum block, and also limit the threaded rod, preventing the threaded rod and frustum block from rotating with the rotation of the threaded tube, thus improving the stability of the movement of the threaded rod and frustum block.

[0013] 3. By using the combination of the annular edge and the annular groove, the rotation of the threaded tube will cause the annular edge to rotate within the annular groove, which can limit the rotation of the threaded tube and prevent the threaded tube from moving up and down. Attached Figure Description

[0014] The advantages of the present invention, as described above and / or in the following detailed description in conjunction with the accompanying drawings, will become clearer and more readily understood. These drawings are merely illustrative and do not limit the scope of the present invention.

[0015] Figure 1 This is a perspective view of one embodiment of the present utility model;

[0016] Figure 2 This is a bottom-view perspective view of one embodiment of the present invention;

[0017] Figure 3 This is a three-dimensional disassembled schematic diagram of one embodiment of the present utility model;

[0018] Figure 4 This is a three-dimensional disassembled schematic diagram of the fixed tube and the threaded tube according to one embodiment of the present invention.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. U-shaped frame, 2. Sleeve tube, 3. Cavity, 4. Clamping claw, 5. Fixed tube, 6. Threaded tube, 7. Threaded rod, 8. Frustum block, 9. Arc block, 10. Rotating shaft, 11. Annular edge, 12. Annular groove, 13. Round hole, 14. Guide bar, 15. Guide groove, 16. Hand-tightening block. Detailed Implementation

[0021] In the following description, embodiments of the fixture for machining pin parts according to the present invention will be described with reference to the accompanying drawings.

[0022] Figure 1-4 This invention illustrates a fixture for machining shaft pin parts according to an embodiment of the present invention. It includes a U-shaped frame 1, with a sleeve tube 2 fixedly mounted on the top of the U-shaped frame 1. Three cavities 3 are arranged in a circular array on the surface of the sleeve tube 2. Rotatable grippers 4 are provided within the inner cavity of each cavity 3. A rotating shaft 10 is mounted within the inner cavity of each cavity 3, and the grippers 4 are rotatably connected to the surface of the rotating shaft 10. A fixed tube 5 is fixedly connected to the top of the inner cavity of the U-shaped frame 1. A threaded tube 6 is rotatably connected to the inner cavity of the fixed tube 5. An annular edge 11 is fixedly connected to the top of the surface of the threaded tube 6. An annular groove 12 is provided within the inner cavity of the fixed tube 5 for the annular edge 11 to rotate. Through the cooperation of the annular edge 11 and the annular groove 12, the rotation of the threaded tube 6 causes the annular edge 11 to rotate within the annular groove 12, thus limiting the rotation of the threaded tube 6 and preventing the threaded tube from rotating. The threaded tube 6 exhibits a tendency to move up and down. The inner cavity of the threaded tube 6 is threadedly connected to a threaded rod 7. A hand-tightening block 16 is fixedly installed at the bottom of the threaded tube 6. A frustum block 8 is fixedly connected to the top of the threaded rod 7. A circular hole 13 is opened at the top of the U-shaped frame 1 for the movement of the annular groove 12. Guide strips 14 are fixedly connected to both sides of the inner cavity of the circular hole 13 and both sides of the inner cavity of the fixed tube 5. Two guide grooves 15 are opened on the surface of the frustum block 8, which slide on the surface of the guide strips 14. Through the cooperation of the guide grooves 15 and the guide strips 14, the movement of the frustum block 8 can be guided and limited, and the threaded rod 7 can also be limited, preventing the threaded rod 7 and the frustum block 8 from rotating with the rotation of the threaded tube 6, thus improving the stability of the movement of the threaded rod 7 and the frustum block 8. An arc-shaped block 9 that matches the frustum block 8 is provided at the bottom of the inner side of the gripper 4.

[0023] Working principle: When using this utility model, the U-shaped frame 1 is fixed on the processing table with screws. By inserting the shaft pin into the inner cavity of the sleeve tube 2, and then operating the threaded tube 6 to rotate, the threaded rod 7 will not rotate with the threaded tube 6 under the limiting of the guide groove 15 and guide bar 14 on the surface of the truncated cone block 8. The threaded rod 7 will move upward due to the thread, and the threaded rod 7 will drive the truncated cone block 8 to move upward. The arc surface of the truncated cone block 8 will abut against the arc block 9. The bottom of the jaw 4 will rotate outward, and the top of the jaw 4 will rotate inward about the rotating shaft 10. The tops of the three jaws 4 will converge towards the middle to fix the shaft pin in the center, and then processing can be carried out.

[0024] In summary: This fixture for machining shaft pin parts works by inserting the shaft pin into the inner cavity of the sleeve tube 2, then rotating the threaded tube 6. The threaded rod 7 moves upward due to the thread, which in turn drives the frustum block 8 to move upward. The frustum block 8 then pushes the jaws 4 to rotate around the rotating shaft 10 via the arc block 9. The tops of the three jaws 4 converge towards the center to fix the shaft pin in a centered position. This achieves the purpose of centrally clamping the shaft pin part by using a tubular opening with three rotating jaws.

Claims

1. A fixture for machining shaft pin parts, characterized in that, The device includes a U-shaped frame (1), a sleeve tube (2) is fixedly installed on the top of the U-shaped frame (1), and three cavities (3) are arranged in a ring array on the surface of the sleeve tube (2). The inner cavity of the cavity (3) is provided with a rotatable gripper (4). A fixed tube (5) is fixedly connected to the top of the inner cavity of the U-shaped frame (1), and a threaded tube (6) is rotatably connected to the inner cavity of the fixed tube (5). A threaded rod (7) is threadedly connected to the inner cavity of the threaded tube (6), and a frustum block (8) is fixedly connected to the top of the threaded rod (7). An arc-shaped block (9) that matches the frustum block (8) is provided at the bottom of the inner side of the gripper (4).

2. The fixture for machining a shaft pin part according to claim 1, characterized in that, The cavity (3) has a rotating shaft (10) installed inside, and the gripper (4) is rotatably connected to the surface of the rotating shaft (10).

3. The fixture for machining shaft pin parts according to claim 2, characterized in that, The top of the surface of the threaded tube (6) is fixedly connected with an annular edge (11), and the inner cavity of the fixed tube (5) is provided with an annular groove (12) for the annular edge (11) to rotate.

4. A fixture for machining shaft pin parts according to claim 3, characterized in that, The top of the U-shaped frame (1) is provided with a circular hole (13) for the movement of the annular groove (12). Guide strips (14) are fixedly connected to both sides of the inner cavity of the circular hole (13) and both sides of the inner cavity of the fixed tube (5). Two guide grooves (15) are provided on the surface of the truncated cone block (8) and slide on the surface of the guide strips (14).

5. A fixture for machining shaft pin parts according to claim 4, characterized in that, A hand-tightening block (16) is fixedly installed at the bottom of the threaded pipe (6).

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