Spline tooth fixing and shaping clamp

By designing spline fixing tooth insertion fixtures, the precise positioning and fixing of splines is achieved using structures such as inner holes and rotating seats, the problem of reduced accuracy caused by spline deformation after heat treatment is solved, and level 6 is achieved in the field of new energy vehicles The above precision of the tooth insertion processing.

CN222359711UActive Publication Date: 2025-01-17DALIAN CHUANGXIN GEARBOX MFG CO LTD
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Patent Information

Application Number
CN202420187336.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-01-26
Publication Date
2025-01-17
Estimated Expiration
2034-01-26

AI Technical Summary

Technical Problem

The splines are deformed after heat treatment, resulting in a reduction in accuracy, making it difficult to achieve the accuracy requirements of level 6 or above. Especially under the high-precision requirements in the field of new energy vehicles, how to insert teeth into the semen after heat treatment has become a problem.

Method used

A spline fixed tooth insertion fixture is designed. By setting an inner hole and a rotating seat that matches the spline shaft in the fixture, combining the positioning seat, cylindrical pin, positioning plate and spring mechanism to ensure accurate positioning and fixing of the spline teeth. , realize the thermal semen insertion.

Benefits of technology

On a tooth insertion machine without a toothing mechanism, the tooth fixing mechanism of the spline fixing fixture can achieve accurate positioning and finishing of splines, achieving the accuracy requirements of level 6 or above.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222359711U_ABST
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Abstract

According to the spline tooth fixing and shaping clamp, an inner hole matched with a spline shaft is formed in the center of a clamp body, a rotating seat is arranged on the outer side of the clamp body, and the rotating seat is fixedly connected with the clamp body; the upper end of the positioning seat is connected with a positioning plate through a cylindrical pin, and the upper end of the positioning plate is transversely provided with a positioning pin; one end of the right-angle pressing plate is located on the upper portion of the end face of the spline shaft, and the other end of the right-angle pressing plate is located on the upper end face of the clamp body. According to the spline tooth fixing and shaping clamp, on a gear shaping machine without a tooth aligning mechanism, spline teeth can be accurately positioned through the tooth fixing mechanism of the spline tooth aligning clamp, so that finish machining of splines is achieved, and the sixth-level precision requirement of the splines is met.
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Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing. Background Art

[0002] There are many spline shafts in automobile gearboxes that need to be slotted. The spline precision is qualified before hot-slotting, but the spline is deformed after heat treatment carburizing and quenching, which makes its precision low and unqualified. With the development of new energy vehicles, the spline precision is required to be above level 6. The spline precision after hot-slotting and then heat treatment carburizing and quenching cannot reach above level 6. Therefore, how to achieve precision slotting of splines after heat treatment is a major problem in the spline shaft processing process. Utility Model Content

[0003] In order to solve the problem of precision insertion of splines after heat treatment, the utility model provides a spline fixed tooth inserting fixture.

[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a spline fixed-tooth inserting clamp, an inner hole 16 matching the spline shaft 15 is provided at the center of the clamp body 1, a rotating seat 10 is provided on the outer side of the clamp body 1, and the rotating seat 10 and the clamp body 1 are fixedly connected; a positioning seat 9 is installed on the rotating seat 10, and the upper end of the positioning seat 9 is connected to the positioning plate 7 through a cylindrical pin 8, and a positioning pin 6 is horizontally installed on the upper end of the positioning plate 7; one end of the right-angle pressure plate 4 is located at the upper end surface of the spline shaft 15, and the other end of the right-angle pressure plate 4 is located at the upper end surface of the clamp body 1, and the pressure plate 4 is fixed to the clamp body 1 by a clamping screw 3.

[0005] The rotating seat 10 is located above the bottom edge of the clamp body 1 , and the rotating seat 10 is fixed to the clamp body 1 by a rotating seat fastening screw 13 .

[0006] A spring 2 is disposed outside the clamping screw 3 between the pressure plate 4 and the end surface of the clamp body 1 .

[0007] A dust cover 5 is installed on the outer side of the spline shaft 15 above the pressure plate 4 .

[0008] The spline fixed-tooth gear shaping fixture of the utility model can accurately position the spline teeth on a gear shaping machine without a gear alignment mechanism through the fixed-tooth mechanism of the spline gear shaping fixture, thereby realizing the fine processing of the spline and achieving the precision requirement of the spline level 6. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a front sectional view of a spline fixed-tooth gear-shaping fixture of the utility model.

[0010] In the figure: 1. clamping body; 2. spring; 3. clamping screw; 4. pressure plate; 5. dust cover; 6. positioning pin; 7. positioning plate; 8. cylindrical pin; 9. positioning seat; 10. rotating seat; 11. clamping body fastening screw; 12. workbench; 13. rotating seat fastening screw; 14. gear inserting cutter; 15. spline shaft; 16. inner hole; 17. spline teeth. DETAILED DESCRIPTION

[0011] The spline fixed tooth gear shaping fixture of the utility model is as follows Figure 1 As shown, the center of the clamp body 1 is provided with an inner hole 16 matching the spline shaft 15, and the outer side of the clamp body 1 is provided with a rotating seat 10, which is located above the bottom edge of the clamp body 1, and the rotating seat 10 is fixed to the clamp body 1 by a rotating seat fastening screw 13; a positioning seat 9 is installed on the rotating seat 10, and the upper end of the positioning seat 9 is connected to the positioning plate 7 by a cylindrical pin 8, and a positioning pin 6 is installed horizontally on the upper end of the positioning plate 7; one end of the right-angle pressure plate 4 is located at the upper end of the spline shaft 15, and the other end of the right-angle pressure plate 4 is located at the upper end face of the clamp body 1, and the pressure plate 4 is fixed to the clamp body 1 by a clamping screw 3, and a spring 2 is provided between the pressure plate 4 and the end face of the clamp body 1 outside the clamping screw 3. A dust cover 5 is installed above the pressure plate 4 on the outer side of the spline shaft 15. The spline fixed tooth gear shaping fixture is designed to be positioned by the outer circle of the shaft diameter and the end face and the spline teeth, and then the workpiece is pressed to perform fine gear shaping after heat treatment, ensuring that the margins on both sides of the tooth profile are uniform during fine shaping, thereby achieving fine gear shaping after heat treatment.

[0012] The usage process is as follows:

[0013] 1) Place the clamp body 1 on the gear shaping machine workbench 12 and fix the clamp body with the clamp body fastening screws 11;

[0014] 2) Place the spline shaft 15 to be processed into the inner hole 16 of the fixture body 1. The spline shaft 15 is centered and positioned by the large diameter and the inner hole 16 of the fixture;

[0015] 3) Move the gear shaping cutter 14 to the edge of the spline teeth 17, and gently rotate the spline shaft 15 to align the cutter teeth with the spline tooth grooves;

[0016] 4) Rotate the rotating seat 10, and the rotating seat drives the gear locator (locating seat 9, cylindrical pin 8, locating plate 7, locating pin 6) to rotate together, and then rotate the locating plate 7 through the rotating shaft (cylindrical pin 8) to make the locating pin 6 align with the spline tooth groove. At this time, tighten the rotating seat fastening screw 13 to fix the rotating seat 10 and the clamp body 11;

[0017] 5) Tighten the clamping screw 3, press the end face of the spline shaft 15 through the pressure plate 4, and fix the spline shaft 15 on the clamp body 1;

[0018] 6) Rotate the positioning plate 7 to make the positioning pin 6 leave the spline teeth;

[0019] 7) Remove the spline gear cutter 14, put on the dust cover 5, and prepare for fine spline insertion;

[0020] 8) Start the gear shaping machine to start precision inserting of spline teeth. After precision inserting of the spline teeth, the accuracy requirements of the design in the drawing are met.

Claims

1. Spline fixed tooth gear shaping fixture, characterized by: The center of the clamp body (1) is provided with an inner hole (16) matching the spline shaft (15); the outer side of the clamp body (1) is provided with a rotating seat (10); the rotating seat (10) and the clamp body (1) are fixedly connected; a positioning seat (9) is installed on the rotating seat (10); the upper end of the positioning seat (9) is connected to the positioning plate (7) through a cylindrical pin (8); the upper end of the positioning plate (7) is transversely installed with a positioning pin (6); one end of the right-angle pressure plate (4) is located at the upper end of the spline shaft (15); the other end of the right-angle pressure plate (4) is located at the upper end surface of the clamp body (1); the pressure plate (4) is fixed to the clamp body (1) through a clamping screw (3).

2. The spline fixed tooth gear shaping fixture according to claim 1, characterized in that: The rotating seat (10) is located above the bottom edge of the clamp body (1), and the rotating seat (10) is fixed to the clamp body (1) via a rotating seat fastening screw (13).

3. The spline fixed tooth gear shaping fixture according to claim 1, characterized in that: A spring (2) is provided outside the clamping screw (3) and between the pressure plate (4) and the end surface of the clamp body (1).

4. The spline fixed tooth gear shaping fixture according to claim 1, characterized in that: A dust cover (5) is installed on the outer side of the spline shaft (15) above the pressure plate (4).