A pinion shaft for an electric vehicle retarder
By designing a positioning groove and a fixing thread on the gear shaft, the detachable installation of the gear shaft is achieved, which solves the problem of high replacement cost of the gear shaft after wear, realizes the reusability of the gear shaft, and reduces replacement costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 上海万众实业股份有限公司
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-28
AI Technical Summary
Existing gear shafts are prone to wear and tear after prolonged use, resulting in high replacement costs.
A gear shaft structure including a positioning groove and a fixing thread was designed. The gear shaft is slidably sleeved with the positioning groove and fixed with the fixing thread, so that the gear shaft can be detached and installed. Only the worn parts need to be replaced for reuse.
This reduces the cost of replacing gear shafts, enables the reusability of gear shafts, and saves on replacement costs.
Smart Images
Figure CN224566556U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of gear shaft technology, and more particularly to a gear shaft for use in electric vehicle reducers. Background Technology
[0002] A gear shaft is a mechanical part that supports rotating parts and rotates with them to transmit motion, torque, or bending moment. It is used in electric vehicle reducers and is generally a metal rod. Each section can have a different diameter. Parts that rotate in a machine are mounted on the shaft. According to the different shapes of the shaft axis, shafts can be divided into two categories: crankshafts and straight shafts. In recent years, with social progress and the rapid development of science and technology, the usage environment and conditions of gear shafts have become more and more diversified, and the requirements for the structure, material, and performance of gear shafts have also become higher and higher.
[0003] After prolonged use, the teeth of existing gear shafts will wear down and become damaged, requiring the replacement of the entire gear shaft. However, gear shafts are very expensive, resulting in high replacement and usage costs. Therefore, an improvement has been made to a gear shaft used in electric vehicle reducers. Utility Model Content
[0004] In view of the shortcomings of the prior art, this application provides a gear shaft for electric vehicle reducers, which overcomes the shortcomings of the prior art and aims to solve the problem that after the gear shaft has been used for a long time, the teeth of the gear shaft will be damaged due to wear, and the entire gear shaft needs to be replaced after wear, which is costly.
[0005] To achieve the above objectives, this application provides the following technical solution: a gear shaft for an electric vehicle reducer, comprising a gear shaft body, the gear shaft body including a positioning part, a fixing part and a connecting part, a gear seat fixedly installed at the bottom of the positioning part, a positioning groove formed on the outer wall of the positioning part, a gear member slidably sleeved on the positioning part through the positioning groove, the bottom of the gear member abutting against the top of the gear seat, a fixing thread provided on the outer surface of the fixing part near the lower end, a fixing member threadedly connected to the fixing part through the fixing thread, the bottom of the fixing member abutting against the top of the gear member.
[0006] By adopting the above technical solution, the positioning groove facilitates the sliding engagement of the shaft gear on the outer surface of the positioning part. The fixing thread facilitates the fixed assembly of the fixing part and the fixing part. The shaft gear seat and the fixing part abut against the shaft gear, thus completing the fixed installation between the shaft gear and the positioning part. This makes it convenient to install and disassemble the shaft gear. When the shaft gear wears out after a long period of use, only the shaft gear needs to be replaced, without replacing the entire shaft. It can be reused, saving costs.
[0007] As a preferred technical solution of this application, the inner wall of the shaft gear is fixedly connected with a positioning block, the number of positioning blocks is four and they are evenly distributed in a circular array on the inner wall of the shaft gear, the number of positioning grooves is four and they are evenly distributed in a circular array along the outer wall of the positioning part, and the positioning blocks and positioning grooves are adapted to each other.
[0008] By adopting the above technical solution, the positioning block and positioning groove facilitate the sliding engagement of the shaft gear on the outer surface of the positioning part, providing the necessary conditions for its installation.
[0009] As a preferred technical solution of this application, the interior of the fixing part is symmetrically inlaid with threaded sleeves above the fixing threads, the outer wall of the fixing part is symmetrically provided with mounting holes, the mounting holes are threadedly connected to fixing bolts, the front end of the fixing bolts is inside the threaded sleeves, and the fixing bolts are adapted to the threaded sleeves.
[0010] By adopting the above technical solution, a second layer of security is provided for the fixed installation of the fixing part and the fastener through fixing bolts, threaded sleeves and mounting holes, ensuring that the fixing part and the fastener are firmly assembled and will not loosen.
[0011] As a preferred technical solution of this application, the upper surface of the fastener is provided with an oil immersion tank, and the outer surface of the fastener is provided with a plurality of conveying grooves, all of which are connected to the oil immersion tank.
[0012] By adopting the above technical solution, when lubricating oil is needed, the lubricating oil is poured into the oil immersion tank, and the lubricating oil will flow out from the conveying tank and flow onto the shaft gear to lubricate it, which is convenient to operate.
[0013] As a preferred technical solution of this application, the outer wall of the shaft tooth is provided with a plurality of shaft teeth, and the cross-section of the plurality of shaft teeth is arranged in an isosceles trapezoidal shape.
[0014] By adopting the above technical solutions, the design of the shaft tooth is reasonable, which can not only ensure the structural strength of the shaft tooth, but also effectively increase the biting area of the shaft tooth, thereby enhancing the torque.
[0015] As a preferred technical solution of this application, the connecting part has a hollow groove inside, and the inner wall of the hollow groove is provided with connecting threads.
[0016] By adopting the above technical solution, the gear shaft is installed onto other parts through the connecting part and connecting thread.
[0017] The beneficial effects of this application are: In this invention, a positioning groove is provided to facilitate the sliding of the shaft gear onto the outer surface of the positioning part. A fixing thread is used to facilitate the fixed assembly of the fixing part and the fixing part together. The shaft gear and the fixing part abut against each other to complete the fixed installation between the shaft gear and the positioning part. This makes it convenient to install and disassemble the shaft gear. When the shaft gear wears out after a long period of use, only the shaft gear needs to be replaced. There is no need to replace the entire shaft. It can be reused and saves costs.
[0018] With reference to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereto. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram showing the connection between the positioning part and the gear in this application; Figure 3 This is a schematic diagram showing the connection between the fixing part and the fixing member in this application; Figure 4 This is a schematic diagram of the overall structure of the fastener in this application.
[0020] In the diagram: 1. Gear shaft body; 2. Positioning part; 3. Fixing part; 4. Connecting part; 5. Gear seat; 6. Positioning groove; 7. Gear shaft component; 8. Positioning block; 9. Gear shaft teeth; 10. Fixing thread; 11. Threaded sleeve; 12. Fixing component; 13. Mounting hole; 14. Fixing bolt; 15. Oil immersion tank; 16. Conveying trough; 17. Connecting thread. Detailed Implementation
[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0022] Reference Figure 1-4A gear shaft for an electric vehicle reducer includes a gear shaft body 1. The gear shaft body 1 includes a positioning part 2, a fixing part 3, and a connecting part 4. A gear seat 5 is fixedly installed at the bottom of the positioning part 2. A positioning groove 6 is formed on the outer wall of the positioning part 2. A gear member 7 is slidably sleeved on the positioning part 2 through the positioning groove 6. The bottom of the gear member 7 abuts against the top of the gear seat 5. A fixing thread 10 is provided on the outer surface of the fixing part 3 near the lower end. A fixing member 12 is threadedly connected to the fixing part 3 through the fixing thread 10. The bottom of the fixing member 12 abuts against the top of the gear member 7. In use, the positioning groove 6 facilitates the sliding of the gear 7 onto the outer surface of the positioning part 2. The fixing thread 10 facilitates the fixing of the fixing part 12 and the fixing part 3 together. The gear seat 5 and the fixing part 12 abut against the gear 7, thus completing the fixed installation between the gear 7 and the positioning part 2. This makes it convenient to install and disassemble the gear 7. When the gear 7 is worn after a long period of use, only the gear 7 needs to be replaced. There is no need to replace the entire gear shaft, so it can be reused and save costs.
[0023] In this embodiment, as Figure 2 As shown, a positioning block 8 is fixedly connected to the inner wall of the shaft gear 7. There are four positioning blocks 8, which are evenly distributed in a circular array on the inner wall of the shaft gear 7. There are four positioning grooves 6, which are evenly distributed in a circular array along the outer wall of the positioning part 2. The positioning blocks 8 and the positioning grooves 6 are adapted to each other. In use, the positioning blocks 8 and the positioning grooves 6 facilitate the sliding of the shaft gear 7 onto the outer surface of the positioning part 2, providing the necessary conditions for its installation.
[0024] In this embodiment, as Figure 3 As shown, the interior of the fixing part 3 is symmetrically inlaid with threaded sleeves 11 above the fixing thread 10. The outer wall of the fixing member 12 is symmetrically provided with mounting holes 13. The mounting holes 13 are threadedly connected to fixing bolts 14. The front end of the fixing bolts 14 is inside the threaded sleeves 11. The fixing bolts 14 and the threaded sleeves 11 are adapted to each other. In use, the fixing bolts 14, threaded sleeves 11 and mounting holes 13 provide a second layer of security for the fixing of the fixing part 3 and the fixing member 12, ensuring that the fixing part 3 and the fixing member 12 are firmly assembled and will not loosen.
[0025] In this embodiment, as Figure 4 As shown, the upper surface of the fixing member 12 is provided with an oil immersion tank 15, and the outer surface of the fixing member 12 is provided with several conveying grooves 16. The several conveying grooves 16 are all connected to the oil immersion tank 15. When it is needed to add lubricating oil, the lubricating oil is poured into the oil immersion tank 15, and the lubricating oil will flow out from the conveying grooves 16 and flow to the shaft gear 7 to lubricate it. The operation is convenient.
[0026] In this embodiment, as Figure 1 and2 As shown, the outer wall of the shaft tooth 7 is provided with a number of shaft teeth 9. The cross-section of the shaft teeth 9 is arranged in an isosceles trapezoid. In use, the shaft teeth 9 are reasonably designed, which can not only ensure the structural strength of the shaft teeth 9, but also effectively increase the biting area of the shaft teeth 9, thereby enhancing the torque.
[0027] In this embodiment, as Figure 1 As shown, the connecting part 4 has a hollow groove inside, and the inner wall of the hollow groove is provided with a connecting thread 17. In use, the gear shaft is installed on other parts through the connecting part 4 and the connecting thread 17.
[0028] Working principle: When using the gear shaft for electric vehicle reducer according to this application, the positioning groove 6 facilitates the sliding of the gear 7 onto the outer surface of the positioning part 2. The fixing thread 10 facilitates the fixing of the fixing part 12 and the fixing part 3 together. The gear 7 is abutted by the gear seat 5 and the fixing part 12, thus completing the fixed installation between the gear 7 and the positioning part 2. This facilitates the installation and disassembly of the gear 7. When the gear shaft is worn after long-term use, only the gear 7 needs to be replaced, without replacing the entire gear shaft. It can be reused, saving costs.
[0029] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A gear shaft for an electric vehicle reducer, comprising a gear shaft body (1), characterized in that, The gear shaft body (1) includes a positioning part (2), a fixing part (3) and a connecting part (4). A gear seat (5) is fixedly installed at the bottom of the positioning part (2). A positioning groove (6) is provided on the outer wall of the positioning part (2). A gear component (7) is slidably sleeved on the positioning part (2) through the positioning groove (6). The bottom of the gear component (7) abuts against the top of the gear seat (5). A fixing thread (10) is provided on the outer surface of the fixing part (3) near the lower end. A fixing member (12) is threadedly connected to the fixing part (3) through the fixing thread (10). The bottom of the fixing member (12) abuts against the top of the gear component (7).
2. The gear shaft for an electric vehicle reducer according to claim 1, characterized in that, The inner wall of the shaft gear (7) is fixedly connected with a positioning block (8). There are four positioning blocks (8) and they are evenly distributed in a circular array on the inner wall of the shaft gear (7). There are four positioning grooves (6) and they are evenly distributed in a circular array along the outer wall of the positioning part (2). The positioning blocks (8) and the positioning grooves (6) are compatible.
3. The gear shaft for an electric vehicle reducer according to claim 1, characterized in that, The inside of the fixing part (3) is symmetrically inlaid with a threaded sleeve (11) above the fixing thread (10). The outer wall of the fixing part (12) is symmetrically provided with mounting holes (13). The mounting holes (13) are threadedly connected to fixing bolts (14). The front end of the fixing bolts (14) is inside the threaded sleeve (11). The fixing bolts (14) are adapted to the threaded sleeves (11).
4. A gear shaft for an electric vehicle reducer according to claim 1, characterized in that, The upper surface of the fastener (12) is provided with an oil immersion tank (15), and the outer surface of the fastener (12) is provided with a plurality of conveying grooves (16), all of which are connected to the oil immersion tank (15).
5. A gear shaft for an electric vehicle reducer according to claim 1, characterized in that, The outer wall of the shaft tooth (7) is provided with a plurality of shaft teeth (9), and the cross-section of the plurality of shaft teeth (9) is arranged in an isosceles trapezoidal shape.
6. A gear shaft for an electric vehicle reducer according to claim 1, characterized in that, The connecting part (4) has a hollow groove inside, and the inner wall of the hollow groove is provided with a connecting thread (17).