Automobile rear hub drilling clamp

Abstract

The utility model discloses an automobile rear hub drilling clamp which comprises a workbench, and two sets of positioning clamps are arranged on the workbench and are respectively an automobile rear hub front face drilling positioning clamp and an automobile rear hub back face drilling positioning clamp. The automobile rear hub front face drilling positioning clamp comprises a center positioning short table and three supporting columns evenly distributed around the center positioning short table along the circumference, a transverse pushing air cylinder is arranged on one side of the workbench, and a U-shaped pushing chuck is fixedly connected to the output end of the transverse pushing air cylinder. The pushing direction of the U-shaped pushing chuck corresponds to the position above the center positioning short table, and the automobile rear hub reverse face drilling positioning clamp comprises a center positioning high table, a limiting table and three supporting columns evenly distributed around the center positioning high table along the circumference. According to the utility model, positioning holes do not need to be additionally processed, the working procedures are reduced, the processing efficiency is greatly improved, the cost is saved, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hub processing, in particular to a drilling fixture for an automobile rear hub. Background Art

[0002] A hub is a cylindrical metal part that supports a tire inside the tire profile and is centered on an axle. It is also called a wheel rim, steel rim, wheel, or tire rim. Hubs come in a wide variety of types according to diameter, width, forming method, and material.

[0003] As Figure 1 and Figure 2 shown, an automobile rear hub includes a central shaft hole 1, a flange ring 2, a first flange connecting disc 3, and a second flange connecting disc 4. When drilling the automobile rear hub, it is necessary to limit the position through the central shaft hole and drill corresponding holes on the flange ring, the first flange connecting disc, and the second flange connecting disc respectively.

[0004] However, the central shaft hole can only limit the radial positioning and cannot limit the circumferential positioning, so precise positioning and automatic drilling cannot be achieved.

[0005] The existing technical means is to precisely position by additionally processing positioning holes on the flange ring and installing positioning posts on the fixture correspondingly. However, on the one hand, additionally processing positioning holes on the flange ring increases the process and raises the cost, and on the other hand, the additional positioning holes will affect the quality of subsequent products. Summary of the Utility Model

[0006] To solve the above technical problems, the utility model designs a drilling fixture for an automobile rear hub.

[0007] The utility model adopts the following technical scheme:

[0008] A drilling fixture for an automobile rear hub includes a workbench, and two groups of positioning fixtures are arranged on the workbench, namely a front drilling positioning fixture for an automobile rear hub and a rear drilling positioning fixture for an automobile rear hub;

[0009] The front drilling positioning fixture for an automobile rear hub includes a central positioning low platform and three support columns evenly distributed along the circumference around the central positioning low platform. Pushing cylinders are respectively arranged at positions of the support columns close to both sides on the workbench. Claws are hinged on the pushing cylinders. The output end of the pushing cylinder is hinged to the end of the claw, and the middle position of the claw is hinged to the cylinder body of the pushing cylinder. A corner cylinder is arranged at the position of the support column close to the middle on the workbench. The output end of the corner cylinder is fixedly connected with a double-headed pressing plate. Claws are respectively arranged at both ends of the double-headed pressing plate. A transverse pushing cylinder is arranged on one side of the workbench. The output end of the transverse pushing cylinder is fixedly connected with a U-shaped pushing chuck, and the pushing direction of the U-shaped pushing chuck is arranged corresponding to the position above the central positioning low platform;

[0010] The reverse drilling positioning fixture for the rear wheel hub of an automobile comprises a central positioning high platform, a limiting platform and three support columns evenly distributed along the circumference around the central positioning high platform. Pushing cylinders are respectively arranged at positions of the support columns close to both sides on the workbench. Claws are hinged to the pushing cylinders. The end of the claw is hinged to the output end of the pushing cylinder, and the middle position of the claw is hinged to the cylinder body of the pushing cylinder. A positioning column is fixedly connected to the limiting platform.

[0011] When the drilling fixture for the rear wheel hub of an automobile is in use, first place the front side of the rear wheel hub of the automobile face up on the central positioning low platform. The central shaft hole is positioned corresponding to the central positioning low platform, and the flange ring is correspondingly supported on the support columns. At this time, after the flange connecting disc II is placed, it is initially positioned corresponding to the direction of the U-shaped pushing chuck. Then start the transverse pushing cylinder, and the transverse pushing cylinder drives the U-shaped pushing chuck to clamp on the flange connecting disc II to achieve precise circumferential positioning of the flange connecting disc II. Then, the pushing cylinder and the corner cylinder are started to control the claw and the chuck to clamp the workpiece. The drill bit of the drilling machine performs automatic drilling. Drilling holes evenly arranged along the circumference on the flange ring and the flange connecting disc II are completed.

[0012] After the front drilling process is completed, after the workpiece is taken off, place it face down on the central positioning high platform. The central shaft hole is positioned corresponding to the central positioning high platform, and the flange ring is correspondingly supported on the support columns. At this time, the processed holes on the flange ring are positioned corresponding to the positioning column on the limiting platform for circumferential positioning. Then, the pushing cylinder and the corner cylinder are started to control the claw and the chuck to clamp the workpiece. The drill bit of the drilling machine performs automatic drilling. Drilling holes evenly arranged along the circumference on the flange connecting disc I are completed.

[0013] Preferably, the central positioning high platform, the central positioning low platform, the limiting platform, the drilling platform, the pushing cylinder and the corner cylinder are respectively fixedly connected to the workbench through bolts.

[0014] Preferably, a lifting lug is fixedly connected to the workbench.

[0015] Preferably, the central positioning high platform and the central positioning low platform are respectively arranged in cooperation with the central shaft hole of the rear wheel hub of the automobile.

[0016] Preferably, the U-shaped pushing chuck is fixedly connected to the output end of the transverse pushing cylinder through bolts.

[0017] The beneficial effects of the present utility model are as follows: The present utility model designs a drilling fixture for the rear wheel hub of an automobile. Without additional machining of positioning holes, only by setting a transverse pushing cylinder and a U-shaped pushing chuck, precise circumferential positioning is achieved to complete front drilling. Then, positioning is carried out through the positioning column and the drilled holes completed on the front side to achieve reverse drilling, reducing the process, greatly improving the processing efficiency, saving costs and prolonging the service life of the product. Description of the Drawings

[0018] Figure 1It is a schematic structural diagram of the reverse-upward angle of the existing rear wheel hub of an automobile;

[0019] Figure 2 It is a schematic structural diagram of the forward-upward angle of the existing rear wheel hub of an automobile;

[0020] Figure 3 It is a schematic structural diagram of the present utility model;

[0021] Figure 4 It is a diagram of the use state of the present utility model;

[0022] In the figure: 1. Central axis hole, 2. Flange ring, 3. First flange connection disc, 4. Second flange connection disc, 5. Workbench, 6. Central positioning high platform, 7. Support column, 8. Pushing cylinder, 9. Rotary cylinder, 10. Double-headed pressing plate, 11. Limiting platform, 12. Central positioning low platform, 13. Transverse pushing cylinder, 14. U-shaped pushing chuck, 15. Lifting lug, 16. Claw, 17. Positioning column. Detailed implementation mode

[0023] The technical solution of the present utility model will be further specifically described below through specific embodiments and in conjunction with the accompanying drawings:

[0024] Embodiment: As Figure 3 and Figure 4 shown, an automobile rear wheel hub drilling fixture includes a workbench 5, and two groups of positioning fixtures are arranged on the workbench, namely a front drilling positioning fixture for the rear wheel hub of an automobile and a reverse drilling positioning fixture for the rear wheel hub of an automobile;

[0025] The front drilling positioning fixture for the rear wheel hub of an automobile includes a central positioning low platform 12 and three support columns evenly distributed around the central positioning low platform along the circumference. Pushing cylinders are respectively arranged at positions of the support columns near both sides on the workbench. A claw 16 is hinged on the pushing cylinder. The output end of the pushing cylinder is hinged to the end of the claw, and the cylinder body of the pushing cylinder is hinged to the middle position of the claw. A rotary cylinder 9 is arranged at the position of the support column near the middle on the workbench. The output end of the rotary cylinder is fixedly connected with a double-headed pressing plate 10. Claws are respectively arranged at both ends of the double-headed pressing plate. A transverse pushing cylinder 13 is arranged on one side of the workbench. The output end of the transverse pushing cylinder is fixedly connected with a U-shaped pushing chuck 14, and the pushing direction of the U-shaped pushing chuck is arranged corresponding to the upper position of the central positioning low platform;

[0026] The reverse drilling positioning fixture for the rear wheel hub of an automobile includes a central positioning high platform 6, a limiting platform 11 and three support columns 7 evenly distributed around the central positioning high platform along the circumference. Pushing cylinders 8 are respectively arranged at positions of the support columns near both sides on the workbench. A claw is hinged on the pushing cylinder. The output end of the pushing cylinder is hinged to the end of the claw, and the cylinder body of the pushing cylinder is hinged to the middle position of the claw. A positioning column 17 is fixedly connected to the limiting platform.

[0027] The center positioning high platform, center positioning low platform, limit platform, drilling platform, pushing cylinder and corner cylinder are respectively fixedly connected to the workbench by bolts.

[0028] A lifting lug 15 is fixedly connected to the workbench. The center positioning high platform and center positioning low platform are respectively arranged in cooperation with the central shaft hole of the rear wheel hub of the automobile. The U-shaped pushing chuck is fixedly connected to the output end of the transverse pushing cylinder by bolts.

[0029] When the drilling fixture for the rear wheel hub of the automobile is used, first place the rear wheel hub of the automobile face up on the center positioning low platform, position the central shaft hole corresponding to the center positioning low platform, and support the flange ring on the support column correspondingly. At this time, place the flange connection disc II in the initial positioning corresponding to the direction of the U-shaped pushing chuck, and then start the transverse pushing cylinder. The transverse pushing cylinder drives the U-shaped pushing chuck to clamp on the flange connection disc II to achieve precise circumferential positioning of the flange connection disc II. Then, start the pushing cylinder and the corner cylinder to control the clamping jaws and claws to clamp the workpiece. The drill bit of the drill press performs automatic drilling. Complete the drilling uniformly arranged along the circumference on the flange ring and the flange connection disc II.

[0030] After the front drilling process is completed, remove the workpiece, turn it face down, and place it on the center positioning high platform. Position the central shaft hole corresponding to the center positioning high platform, and support the flange ring on the support column correspondingly. At this time, the processed holes on the flange ring are circumferentially positioned corresponding to the positioning posts of the limit platform. Then, start the pushing cylinder and the corner cylinder to control the clamping jaws and claws to clamp the workpiece. The drill bit of the drill press performs automatic drilling. Complete the drilling uniformly arranged along the circumference on the flange connection disc I.

[0031] The above-described embodiments are only a preferred solution of the present invention, and do not impose any form of limitation on the present invention. There are other variations and modifications without exceeding the technical solutions described in the claims.

Claims

1. An automotive rear hub drilling fixture, comprising a workbench, characterized in that, There are two sets of positioning jigs on the workbench, namely the front drilling positioning jig for the automobile rear hub and the rear drilling positioning jig for the automobile rear hub; The front drilling positioning jig for the automobile rear hub includes a central positioning low platform and three support columns evenly distributed along the circumference around the central positioning low platform. Pushing cylinders are respectively arranged at positions of the support columns near both sides of the workbench. Claws are hinged on the pushing cylinders. The output end of the pushing cylinder is hinged to the end of the claw, and the cylinder body of the pushing cylinder is hinged to the middle position of the claw. A corner cylinder is arranged at the position of the support column near the middle of the workbench. A double-headed pressing plate is fixedly connected to the output end of the corner cylinder. Claws are respectively arranged at both ends of the double-headed pressing plate. A transverse pushing cylinder is arranged on one side of the workbench. A U-shaped pushing chuck is fixedly connected to the output end of the transverse pushing cylinder. The pushing direction of the U-shaped pushing chuck is arranged corresponding to the upper position of the central positioning low platform; The rear drilling positioning jig for the automobile rear hub includes a central positioning high platform, a limiting platform and three support columns evenly distributed along the circumference around the central positioning high platform. Pushing cylinders are respectively arranged at positions of the support columns near both sides of the workbench. Claws are hinged on the pushing cylinders. The output end of the pushing cylinder is hinged to the end of the claw, and the cylinder body of the pushing cylinder is hinged to the middle position of the claw. A positioning column is fixedly connected to the limiting platform.

2. The automotive rear hub drilling fixture according to claim 1, characterized in that, The central positioning high platform, the central positioning low platform, the limiting platform, the drilling platform, the pushing cylinder and the corner cylinder are respectively fixedly connected to the workbench by bolts.

3. The drilling fixture for the rear hub of an automobile according to claim 1, characterized in that, Lifting lugs are fixedly connected to the workbench.

4. A drilling fixture for the rear hub of an automobile according to claim 1, characterized in that, The central positioning high platform and the central positioning low platform are respectively arranged in cooperation with the central shaft holes of the automobile rear hub.

5. The drilling fixture for the rear hub of an automobile according to claim 1, characterized in that, The U-shaped pushing chuck and the output end of the transverse pushing cylinder are fixed by bolts.

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