Low-fault elastic check ring assembly tool
By designing a low-failure elastic retaining ring assembly fixture and manufacturing it using 3D printing technology, the assembly process is simplified, assembly efficiency and accuracy are improved, costs are reduced, it is suitable for non-professional operation, and the service life of the transmission is extended.
Patent Information
- Application Number
- CN202520094650.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-15
AI Technical Summary
The assembly process of the elastic retaining ring of the traditional automobile transmission is complicated, relying on multiple steps and tools, resulting in a high failure rate, high cost, difficulty in ensuring assembly accuracy, and high skill requirements for technicians.
A low-failure elastic retaining ring assembly fixture is designed and manufactured using 3D printing technology. The fixture body has a gear groove, a limiting area, and a guiding area. The supporting force and the direction of the striking force are relatively horizontal, simplifying the assembly process.
It improves assembly efficiency and accuracy, reduces costs and production cycles, is suitable for non-professional operation, extends the service life of the transmission, and enhances the flexibility and response speed of on-site maintenance.
Smart Images
Figure CN223820425U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive transmission technology, specifically relating to a low-failure elastic retaining ring assembly fixture. Background Technology
[0002] The gear on the reverse gear shaft of a car transmission is fixed by a flexible retaining ring. The traditional method is to install the flexible retaining ring vertically. Because the direction of the supporting force is perpendicular to the direction of the striking force and it is not convenient to observe, it requires a high level of skill from the technician. If you are not careful, the flexible retaining ring may not be installed properly or may be damaged, affecting the normal operation of the transmission.
[0003] Currently, the assembly of elastic retaining rings in automotive transmissions often relies on a cumbersome process involving multiple steps and tools. This is not only costly and time-consuming, but also makes it difficult to ensure assembly accuracy, leading to a high failure rate and making on-site emergency repairs extremely inconvenient. Therefore, the market urgently needs a dedicated tooling that is low-failure, low-cost, easy to operate, and highly integrated. Utility Model Content
[0004] The purpose of this utility model is to provide a low-failure elastic retaining ring assembly fixture, which assembles the elastic retaining ring onto the reverse gear shaft of an automotive transmission, solving the cumbersome process of multiple steps and tools, and significantly improving on-site work efficiency.
[0005] The technical solution adopted by this utility model is:
[0006] A low-failure elastic retaining ring assembly fixture includes a fixture body. A gear groove is formed in the middle of the upper surface of the fixture body, and a left semi-circular limiting area and a right semi-circular limiting area are formed at the left and right ends of the gear groove, respectively. A left guide area and a clamping groove are connected from left to right at the upper end of the left semi-circular limiting area, and a right guide area and a right vertical limiting area are connected from left to right at the upper end of the right semi-circular limiting area.
[0007] Compared with the prior art, the present invention has the following advantages:
[0008] This invention simplifies the assembly process of the elastic retaining ring, improves work efficiency, and the tooling is small and easy to carry. This tooling can be manufactured using 3D printing technology, which reduces costs and production cycle. This tooling ensures the accuracy and safety of the elastic retaining ring assembly process and helps to extend the overall service life of the transmission.
[0009] The integrated design of this utility model reduces the skill requirements for operators, allowing even non-professionals to quickly get started.
[0010] This invention ensures the accuracy and safety of the assembly process, solves the problem of elastic retaining rings coming off due to damage or misalignment, and extends the service life of the transmission.
[0011] This invention solves the problems of traditional tooling being bulky and having many parts that are inconvenient to carry. It is suitable for temporary assembly of elastic retaining rings and emergency repair needs in various environments, improving the flexibility and response speed of automotive repair services.
[0012] This invention has low requirements for precision and materials, and can use 3D printing technology to solve the problems of high cost and long cycle of traditional elastic retaining ring assembly tooling customization. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the reverse gear shaft and gear accessories of the transmission involved in this utility model;
[0015] Figure 3 This utility model relates to an elastic retaining ring and an elastic retaining ring mounting plate;
[0016] Figure 4 This is a schematic diagram of the utility model in use;
[0017] Figure 5 This is a schematic diagram showing the completed assembly of the elastic retaining ring;
[0018] The components are: 1. Tooling body; 2. Left end guide area; 3. Clamping groove; 4. Left end semi-circular limiting area; 5. Gear groove; 6. Right end guide area; 7. Right end semi-circular limiting area; 8. Right end vertical limiting area; 9. Reverse gear shaft; 10. Elastic retaining ring limiting groove; 11. Shim; 12. Transmission gear; 13. Reverse gear shaft assembly; 14. Elastic retaining ring; 15. Elastic retaining ring mounting plate. Detailed Implementation
[0019] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model will be provided below with reference to the accompanying drawings.
[0020] like Figure 1 As shown, this utility model provides a low-failure elastic retaining ring assembly fixture, including a fixture body 1. A gear groove 5 is formed in the middle of the upper surface of the fixture body 1, and a left semi-circular limiting area 4 and a right semi-circular limiting area 7 are formed at the left and right ends of the gear groove 5, respectively. A left guide area 2 and a clamping groove 3 are connected from left to right at the upper end of the left semi-circular limiting area 4, and a right guide area 6 and a right vertical limiting area 8 are connected from left to right at the upper end of the right semi-circular limiting area 7.
[0021] like Figure 1As shown, the tooling body 1 has a frustum structure on the outside, which facilitates stable placement of the tooling on the platform. The bottom can be fixed with glue for long-term use. The size of the frustum is adjusted according to the reverse gear shaft assembly, reducing the volume while meeting strength requirements, making it easy to carry.
[0022] like Figure 1 , Figure 2 As shown, the left semicircular limiting area 4 and the right semicircular limiting area 7 are semicircular structures with their centers on the same axis and relatively horizontal to the bottom of the tooling body 1. The diameters of the left semicircular limiting area 4 and the right semicircular limiting area 7 are 9% to 11% larger than the diameter of the reverse gear shaft 9 at the contact point. This structure can prevent stress concentration, extend the service life of the tooling of this utility model, and ensure that the reverse gear shaft 9 is placed stably.
[0023] like Figure 1 As shown, the left guide area 2 and the right guide area 6 are both at a 60° angle. The guide surfaces of the left guide area 2 and the right guide area 6 are tangent to the semicircles of the left semicircular limiting area 4 and the right semicircular limiting area 7, which facilitates the placement of the reverse gear shaft 9.
[0024] like Figure 1 , Figure 2 As shown, the gear groove 5 is adjusted to accommodate the size of the intermediate gear. The diameter and width of the gear groove 5 are 30% larger than the outer dimensions of the transmission gear 12 to prevent interference with the transmission gear 12 and facilitate clamping.
[0025] like Figure 1 , Figure 2 , Figure 3 As shown, the right-end vertical limiting area 8 adopts a semi-circular structure. The position design of the semi-circular limiting part ensures the contact area of the outer diameter of the large end of the reverse gear shaft 9. The height of the semi-circular limiting part is lower than the center of the outer diameter of the reverse gear shaft 9. This structure not only prevents the reverse gear shaft 9 from moving left and right during the installation of the elastic retaining ring 14, but also allows the hand to directly reach into the clamping groove 3 to pinch the large end of the reverse gear shaft 9 and the transmission gear 12 to remove the reverse gear shaft assembly 13 after the elastic retaining ring 14 is installed.
[0026] Finally, the tooling of this invention was printed using a 3D printer, and the elastic retaining ring was installed. The finished 3D-printed tooling weighs approximately 1 kg, making it easy to carry.
[0027] like Figure 4 , Figure 5 As shown, the usage method is as follows:
[0028] First, draw the model of the tooling body 1, and then use 3D printing to print the tooling body 1.
[0029] The transmission gear 12 and the shim 11 are assembled onto the reverse gear shaft 9, and then the reverse gear shaft assembly 13 is placed onto the tooling body 1 by hand or by a jig.
[0030] The reverse gear shaft 9 is supported at both ends by the left guide area 2 and the right guide area 6, and then by the left semi-circular limiting area 4 and the right semi-circular limiting area 7. For example... Figure 4 Finally, press the right end of the reverse gear shaft 9 against the right end vertical limit area 8.
[0031] Place the elastic retaining ring 14 on the elastic retaining ring mounting plate 15, and align the elastic retaining ring 14 with the elastic retaining ring limiting groove 10. Figure 4 Use a tool to tap the elastic retaining ring mounting plate 15 in the direction of the arrow. Since the direction of the supporting force is relatively horizontal with the direction of the tapping force, it can ensure that the elastic retaining ring 14 is accurately installed into the elastic retaining ring limiting groove 10, which solves the problem of the elastic retaining ring coming off due to damage or misalignment, and extends the service life of the transmission.
[0032] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A low-failure elastic retaining ring assembly fixture, characterized in that: The tooling body (1) has a gear groove (5) in the middle of its upper surface, and a left semicircular limiting area (4) and a right semicircular limiting area (7) are respectively connected at the left and right ends of the gear groove (5). The left semicircular limiting area (4) is connected from left to right to the left guide area (2) and the clamping groove (3). The right semicircular limiting area (7) is connected from left to right to the right guide area (6) and the right vertical limiting area (8).
2. The low-failure elastic retaining ring assembly fixture according to claim 1, characterized in that: The tooling body (1) has a frustum structure on the outside.
3. The low-failure elastic retaining ring assembly fixture according to claim 2, characterized in that: The left guide area (2) and the right guide area (6) are both at a 60° angle. The guide surfaces of the left guide area (2) and the right guide area (6) are tangent to the semicircles of the left semicircular limiting area (4) and the right semicircular limiting area (7).
4. The low-failure elastic retaining ring assembly fixture according to claim 2, characterized in that: The right-end vertical limiting area (8) adopts a semi-circular structure, and the height of the semi-circular limiting part is lower than the center of the outer diameter of the reverse gear shaft (9).