Turning fixture for automotive bell housing

Abstract

The utility model relates to the field of machining technology, and relates to a turning fixture suitable for automobile bell housings. The utility model positions the housing through a positioning fixture, and the mandrel is connected to the clamping pins. The mandrel drives multiple clamping pins to synchronously extend out of the guide holes to center the housing. The multi-point clamping pins are used to contact the ball surface of the workpiece, and the workpiece is tightened when the mandrel is pushed forward. The assembly is convenient, the clamping is more stable, and the precision of the processed product is higher. At the same time, based on the centering clamping of the ball surface of the workpiece blank, the allowance of the next ball surface processing is reduced, and the allowance is more uniform, ensuring the product precision.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a turning fixture suitable for a bell-shaped housing of an automobile. Background Art

[0002] The constant velocity universal joint is a mechanism that connects two axes that do not overlap and transmits motion at the same angular velocity. It is an important component in the car transmission system. The ball cage universal joint is the mainstream of the car universal joint, and the bell shell is a key part of the ball cage universal joint. Different fixtures are used for different workpieces. The existing fixtures cannot meet the needs of fixing the bell shell workpiece. It needs to be clamped multiple times during turning to complete the turning of the bell shell parts. With multiple circulation and clamping, it is difficult to meet the design requirements for machining accuracy, making it difficult to control the machining quality. Therefore, after the bell shell is formed, it is generally necessary to perform finishing on the outer circle of the bell shell, which is time-consuming and labor-intensive. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a turning fixture suitable for automobile bell housings, which has multi-point clamping pins contacting the ball surface of the workpiece, is easy to assemble, has more stable clamping, and has higher precision of the processed product.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model to solve its technical problems is:

[0005] A turning fixture suitable for a bell housing of an automobile, comprising:

[0006] A main body, on which a guide cylinder is arranged, and a core shaft is passed through the guide cylinder;

[0007] A positioning jig is arranged at the end of the guide cylinder, and is used to position the housing;

[0008] A clamping assembly is arranged on the guide cylinder. The clamping assembly is arranged opposite to the positioning fixture. The clamping assembly includes a plurality of clamping pins. A guide hole is arranged on the guide cylinder. The clamping pin is passed through the guide hole. The mandrel is drivingly connected to the clamping pin. The mandrel is used to drive the plurality of clamping pins to synchronously extend out of the guide hole to center the shell.

[0009] In one embodiment of the present invention, the positioning fixture comprises a positioning block, a fixture block is arranged on the positioning block, a contoured positioning surface is arranged on the fixture block, and a reference block is arranged on the fixture block.

[0010] In an embodiment of the utility model, a guide hole is provided on the core shaft, a guide rod is provided on the positioning block, the guide rod passes through the guide hole, and the guide rod is sealedly connected to the inner wall of the guide hole.

[0011] In one embodiment of the utility model, a sliding hole is provided on the body, a piston rod is provided on the core shaft, the piston rod is slidably arranged on the sliding hole, and the depth of the sliding hole is greater than the thickness of the piston rod.

[0012] In one embodiment of the utility model, a flange is further included, the flange is provided with a mounting groove, the body is arranged on the mounting groove, a pull rod is passed through the flange, and the pull rod is connected to the core shaft.

[0013] In one embodiment of the utility model, the clamping pin comprises a cylinder, a mounting hole is provided on the cylinder, a clamping block is provided on the mounting hole, and a positioning cone head is provided on the clamping block.

[0014] In one embodiment of the utility model, an inclined groove is provided on the core shaft, and a guide inclined surface is provided at the bottom of the cylinder. The guide inclined surface is slidably arranged on the inclined groove. The core shaft reciprocates on the main body so that the wire inclined surface on the cylinder slides along the inclined groove to drive multiple clamping pins to synchronously extend out of the guide holes.

[0015] In one embodiment of the utility model, guide strips are arranged on both sides of the inclined groove, and guide grooves matching the guide strips are arranged on the cylinder body, and the guide cylinder is slidably arranged on the guide strips through the guide grooves.

[0016] In one embodiment of the utility model, a limiting assembly is further included, the limiting assembly includes a limiting screw, a limiting hole is provided on the guide cylinder, the limiting screw is provided on the limiting hole, a limiting groove is provided on the core shaft, and the free end of the limiting screw is passed through the limiting groove.

[0017] In one embodiment of the utility model, it also includes an oil nozzle, a first flow channel is provided on the main body, a second flow channel is provided on the guide cylinder, the first flow channel is connected to the second flow channel, the oil nozzle is connected to the first flow channel, and the second flow channel is connected to the guide hole.

[0018] Beneficial effects of the utility model:

[0019] The utility model positions the shell body through a positioning fixture, and the core shaft is driven and connected with the clamping pins. The core shaft drives multiple clamping pins to synchronously extend out of the guide holes to center and position the shell body. Multi-point clamping pins are used to contact the ball surface of the workpiece, and the workpiece is tightened when pushed forward by pushing the core shaft. The assembly is convenient, the clamping is more stable, and the precision of the processed product is higher. At the same time, based on the ball surface centering clamping of the workpiece blank, the excess of the next ball surface processing is reduced, and the excess is more uniform, thereby ensuring the product precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a schematic diagram of a turning fixture suitable for a bell-shaped housing of an automobile.

[0021] Figure 2 It is a schematic diagram of the clamping assembly of the utility model.

[0022] Explanation of the numbers in the figure: 1. Shell; 2. Positioning fixture; 21. Positioning block; 22. Fixture block; 23. Reference block; 24. Guide rod; 25. Guide hole; 3. Mandrel; 31. Piston rod; 32. Sliding hole; 33. Flange; 34. Pull rod; 4. Limit screw; 41. Limit groove; 5. Body; 51. Oil nozzle; 52. First flow channel; 53. Guide cylinder; 54. Second flow channel; 55. Guide hole; 6. Clamping pin; 61. Cylinder; 62. Positioning cone head; 63. Bevel groove; 64. Guide strip; 65. Guide groove; 66. Clamping block. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0024] Reference Figure 1-2 , a turning fixture suitable for a bell housing of an automobile, comprising:

[0025] The body 5 is provided with a guide cylinder 53, and the guide cylinder 53 is penetrated by the core shaft 3;

[0026] A positioning jig 2 is provided at the end of the guide cylinder 53, and the positioning jig 2 is used to position the housing 1;

[0027] The clamping assembly is arranged on the guide cylinder 53. The clamping assembly is arranged opposite to the positioning fixture 2. The clamping assembly includes a plurality of clamping pins 6. A guide hole 55 is arranged on the guide cylinder 53. The clamping pin 6 is passed through the guide hole 55. The core shaft 3 is drivingly connected to the clamping pin 6. The core shaft 3 is used to drive the plurality of clamping pins 6 to synchronously extend out of the guide hole 55 to center the shell 1.

[0028] The utility model positions the shell 1 through the positioning fixture 2, the core shaft 3 is driven and connected with the clamping pin 6, the core shaft 3 drives multiple clamping pins 6 to synchronously extend out of the guide hole 55 to center and position the shell 1, and adopts multi-point clamping pins 6 to contact the ball surface of the workpiece, and the workpiece is tightened when pushing forward by pushing the core shaft 3, which is convenient to assemble, more stable clamping, and higher precision of the processed product; at the same time, based on the ball surface centering clamping of the workpiece blank, the excess of the subsequent ball surface processing is reduced, and the excess is more uniform, thereby ensuring the product precision.

[0029] In one embodiment of the utility model, the positioning fixture 2 includes a positioning block 21, a fixture block 22 is provided on the positioning block 21, a contoured positioning surface is provided on the fixture block 22, and a reference block 23 is provided on the fixture block 22. The bell-shaped shell is sleeved on the positioning fixture 2, and the reference block 23 and the square positioning surface are used to perform initial positioning on the bell-shaped shell, which is convenient for the subsequent clamping pin 6 to tighten and position the workpiece, and the processing accuracy is higher.

[0030] In one embodiment of the utility model, a guide hole 25 is provided on the core shaft 3 , a guide rod 24 is provided on the positioning block 21 , the guide rod 24 passes through the guide hole 25 , and the guide rod 24 is sealedly connected to the inner wall of the guide hole 25 .

[0031] Specifically, the guide rod 24 is sealedly connected to the inner wall of the guide hole 25, and the guide rod 24 is inserted into the guide hole 25, so that the guide rod 24 can support and guide the free end of the core shaft 3, thereby avoiding position deviation when the clamping pin 6 is ejected, and improving the operating stability of the core shaft 3.

[0032] In one embodiment of the utility model, a sliding hole 32 is provided on the main body 5, and a piston rod 31 is provided on the core shaft 3. The piston rod 31 is slidably arranged on the sliding hole 32. The depth of the sliding hole 32 is greater than the thickness of the piston rod 31. The structure is simple, the operating stability of the core shaft 3 is improved, and the effect is good.

[0033] In one embodiment of the utility model, a flange 33 is further included. A mounting groove is provided on the flange 33 . The body 5 is provided on the mounting groove. A pull rod 34 is passed through the flange 33 . The pull rod 34 is connected to the core shaft 3 .

[0034] Specifically, the flange 33 is connected to the processing equipment, the pull rod 34 is connected to the driving source, the core shaft 3 is pulled away from the positioning fixture 2 by the pull rod 34, and the piston rod 31 slides on the sliding hole 32, which can facilitate the assembly and use of the fixture and improve the processing efficiency.

[0035] In an embodiment of the present utility model, the clamping pin 6 comprises a cylinder 61 , a mounting hole is provided on the cylinder 61 , a clamping block 66 is provided on the mounting hole, and a positioning cone head 62 is provided on the clamping block 66 .

[0036] Specifically, multiple clamping pins 6 are driven to synchronously extend out of the guide holes 55, so that the positioning cone heads 62 on the multiple clamping pins 6 clamp and position the bell shell, and a three-point ball head pin (clamping pin 6) is used to contact the ball surface of the workpiece so that it is centered and clamped based on the ball surface of the blank, reducing the allowance of the subsequent ball processing, and making the allowance more uniform, thereby ensuring product accuracy.

[0037] In one embodiment of the utility model, an inclined groove 63 is provided on the core shaft 3, and a guide inclined surface is provided at the bottom of the cylinder 61, and the guide inclined surface is slidably arranged on the inclined groove 63. The core shaft 3 reciprocates on the main body 5 so that the wire inclined surface on the cylinder 61 slides along the inclined groove 63 to drive multiple clamping pins 6 to synchronously extend out of the guide hole 55.

[0038] In an embodiment of the utility model, guide strips 64 are provided on both sides of the inclined groove 63 , guide grooves 65 matching the guide strips 64 are provided on the cylinder 61 , and the guide cylinder 53 is slidably disposed on the guide strips 64 through the guide grooves 65 .

[0039] Specifically, the core shaft 3 reciprocates on the main body 5 so that the inclined surface of the wire on the cylinder 61 slides along the inclined groove 63, and the cylinder 61 is slid on the guide bar 64 through the guide groove 65, driving multiple clamping pins 6 to synchronously extend out of the guide hole 55 to tighten the workpiece. The forward-pushing sliding core shaft 3 with a dovetail groove formed by the inclined groove 63 and the guide bar 64 can tighten the workpiece when pushed forward. In this way, the dovetail groove on the core shaft 3 is easier to process, easier to assemble, more stable to clamp, and the processed product has higher precision.

[0040] In one embodiment of the utility model, a limiting assembly is further included, the limiting assembly includes a limiting screw, a limiting hole is provided on the guide cylinder 53, the limiting screw 4 is provided on the limiting hole, a limiting groove 41 is provided on the core shaft 3, and the free end of the limiting screw is passed through the limiting groove 41.

[0041] Specifically, the free end of the limit screw is inserted into the limit groove 41. When the core shaft 3 slides on the guide cylinder 53, the two side surfaces of the limit groove 41 can abut against the limit screw, thereby limiting the reciprocating stroke of the core shaft 3. The limit adjustment operation is simple and fast.

[0042] In one embodiment of the utility model, it also includes an oil nozzle 51, a first flow channel 52 is provided on the main body 5, a second flow channel 54 is provided on the guide cylinder 53, the first flow channel 52 is connected to the second flow channel 54, the oil nozzle 51 is connected to the first flow channel 52, and the second flow channel 54 is connected to the guide hole 55.

[0043] Specifically, the oil nozzle 51 is connected to the first flow channel 52, and the second flow channel 54 is connected to the guide hole 55. Lubricating oil can be injected into the clamping assembly through the oil nozzle 51 to lubricate the sliding structure thereon, thereby ensuring the stability of the clamp and increasing its service life.

[0044] Usage process

[0045] The flange 33 is connected to the processing equipment, and the pull rod 34 is connected to the driving source. The core shaft 3 is pulled away from the positioning fixture 2 through the pull rod 34. The piston rod 31 slides on the sliding hole 32. The guide cylinder 53 is slid on the guide bar 64 through the guide groove 65, thereby driving multiple clamping pins 6 to retract into the guide hole 55 synchronously, and the bell shell is sleeved on the positioning fixture 2. After the reference block 23 and the square positioning surface perform initial positioning on the bell shell, the driving source pulls the core shaft 3 toward the positioning fixture 2 through the pull rod 34. The guide cylinder 53 is slidably arranged on the guide bar 64 through the guide groove 65, thereby driving multiple clamping pins 6 to synchronously extend out of the guide hole 55, so that the positioning cone heads 62 on the multiple clamping pins 6 can clamp and position the bell shell, and a three-point ball head pin (clamping pin 6) is used to contact the ball surface of the workpiece, and the forward-pushing sliding mandrel 3 with a dovetail groove formed by the inclined groove 63 and the guide bar 64 is used to tighten the workpiece when pushing forward. In this way, the dovetail groove on the mandrel 3 is easier to process, easier to assemble, more stable to clamp, and the processed product has higher precision.

[0046] The above-described embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A turning fixture suitable for automobile bell housing, characterized in that: include: A main body, on which a guide cylinder is arranged, and a core shaft is passed through the guide cylinder; A positioning jig is arranged at the end of the guide cylinder, and is used to position the housing; A clamping assembly is arranged on the guide cylinder. The clamping assembly is arranged opposite to the positioning fixture. The clamping assembly includes a plurality of clamping pins. A guide hole is arranged on the guide cylinder. The clamping pin is passed through the guide hole. The mandrel is drivingly connected to the clamping pin. The mandrel is used to drive the plurality of clamping pins to synchronously extend out of the guide hole to center the shell.

2. The turning fixture for automobile bell housing according to claim 1, characterized in that: The positioning jig comprises a positioning block, a jig block is arranged on the positioning block, a contoured positioning surface is arranged on the jig block, and a reference block is arranged on the jig block.

3. The turning fixture for automobile bell housing according to claim 2, characterized in that: The core shaft is provided with a guide hole, the positioning block is provided with a guide rod, the guide rod is passed through the guide hole, and the guide rod is sealedly connected to the inner side wall of the guide hole.

4. The turning fixture for automobile bell housing according to claim 1, characterized in that: The body is provided with a sliding hole, the core shaft is provided with a piston rod, the piston rod is slidably arranged on the sliding hole, and the depth of the sliding hole is greater than the thickness of the piston rod.

5. The turning fixture for automobile bell housing according to claim 4, characterized in that: It also includes a flange, which is provided with a mounting groove, the body is arranged on the mounting groove, a pull rod is passed through the flange, and the pull rod is connected to the core shaft.

6. The turning fixture for automobile bell housing according to claim 1, characterized in that: The clamping pin comprises a cylinder body, a mounting hole is arranged on the cylinder body, a clamping block is arranged on the mounting hole, and a positioning cone head is arranged on the clamping block.

7. The turning fixture for automobile bell housing according to claim 6, characterized in that: The core shaft is provided with an inclined groove, and the bottom of the cylinder is provided with a guiding inclined surface, which is slidably arranged on the inclined groove. The core shaft reciprocates on the main body so that the wire inclined surface on the cylinder slides along the inclined groove to drive multiple clamping pins to extend out of the guide holes synchronously.

8. The turning fixture for automobile bell housing according to claim 7, characterized in that: Guide strips are arranged on both sides of the inclined groove, and guide grooves matching the guide strips are arranged on the cylinder body, and the guide cylinder is slidably arranged on the guide strips through the guide grooves.

9. The turning fixture for automobile bell housing according to claim 1, characterized in that: It also includes a limiting component, which includes a limiting screw. A limiting hole is arranged on the guide cylinder, and the limiting screw is arranged on the limiting hole. A limiting groove is arranged on the core shaft, and the free end of the limiting screw is passed through the limiting groove.

10. The turning fixture suitable for automobile bell housing according to claim 1, characterized in that: It also includes an oil nozzle, a first flow channel is arranged on the main body, a second flow channel is arranged on the guide cylinder, the first flow channel is connected with the second flow channel, the oil nozzle is connected with the first flow channel, and the second flow channel is connected with the guide hole.

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