Electric transmission for tricycle
By adopting an input shaft, differential, and two-speed gear set design in the electric vehicle transmission, combined with helical gears and a shifting mechanism, the problems of complex structure and easy wear of existing electric vehicle transmissions are solved, resulting in a transmission with high reliability and low failure rate, ensuring driving safety and smoothness.
Patent Information
- Application Number
- CN202520070976.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2035-01-13
AI Technical Summary
Existing electric vehicle transmissions have complex structures, are prone to wear, resulting in low durability and reliability, and the shifting operation is complicated.
The design employs an input shaft, differential, and two-speed gear set, combined with helical gears and a shifting mechanism. It achieves fast and slow gear switching through synchronized gears and shift forks, simplifying the structure and improving power transmission stability.
This invention achieves a transmission with simple structure, high reliability, and low cost, reducing the failure rate, ensuring driving safety and smoothness, and avoiding misoperation.
Smart Images
Figure CN223536884U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric transmission technology, and in particular to electric transmissions for three-wheeled vehicles. Background Technology
[0002] Currently, electric vehicles are generally driven by electric motors. In existing technology, when an electric vehicle is moving forward, the motor rotates in the forward direction, and when it needs to reverse, the motor rotates in the reverse direction. Electric vehicles exhibit both high-speed and low-speed driving states during forward movement. Some electric vehicles use a gear shifting device on the transmission to change the gear ratio by moving and engaging corresponding shift gears, thus switching between high and low gears. However, this type of transmission has a relatively complex structure, requiring many movable components. Furthermore, the gear shifting device and shift gears are prone to wear after prolonged use, resulting in lower durability and reliability. Utility Model Content
[0003] The purpose of this invention is to provide an electric transmission for three-wheeled vehicles that has a low failure rate, high reliability, and high durability.
[0004] The purpose of this utility model is achieved through the following technical solution: an electric transmission for tricycles, including an input shaft and a differential with output teeth, a gear is provided on the input shaft, and a two-speed gear set is provided between the input shaft and the differential, the two-speed gear set respectively cooperating with the gear on the input shaft and the differential; a shifting mechanism for moving the two-speed gear set is provided on the two-speed gear set.
[0005] The gear on the input shaft includes a fast-speed active gear and a slow-speed active gear. The slow-speed active gear is located at one end of the input shaft and is integrally formed with the input shaft. A spline is provided at the other end of the input shaft.
[0006] Further described, the two-speed gear set includes a gear shaft, on which are provided fast driven teeth and slow driven teeth that respectively mesh with fast driving teeth and slow driving teeth; on the gear shaft and located outside the fast driven teeth, there are transmission teeth integrally formed with the gear shaft; the transmission teeth mesh with output teeth.
[0007] In this utility model, the shifting mechanism includes a synchronous tooth disposed on the gear shaft and located between the fast driven tooth and the slow driven tooth, a shift fork disposed on the synchronous tooth, and a shift fork shaft disposed at the upper end of the shift fork.
[0008] To make power transmission more stable, the slow-speed driving tooth, slow-speed driven tooth, transmission tooth, and output tooth are all helical teeth. The width of the slow-speed driving tooth is greater than that of the slow-speed driven tooth, and the width of the transmission tooth is greater than that of the output tooth.
[0009] Due to the adoption of the above technical solution, this utility model has the advantages of simple structure, reliable use and low cost. It can reduce the failure rate of the transmission and improve its reliability and durability. It not only makes shifting operation convenient and prevents misoperation, ensuring the safety of vehicle driving, but also makes driving smoother.
[0010] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0011] The accompanying drawings of this utility model are described below:
[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. However, this utility model is not limited to these embodiments. Any improvements or substitutions based on the basic spirit of these embodiments shall still fall within the scope of protection claimed by the claims of this utility model.
[0014] Example 1: As Figure 1 As shown, an electric transmission for a three-wheeled vehicle includes an input shaft 1 and a differential 2 with output gears 3. Gears are provided on the input shaft 1, and a two-speed gear set is provided between the input shaft 1 and the differential 2. The two-speed gear set respectively cooperates with the gears on the input shaft 1 and the differential 2. A shifting mechanism for moving the two-speed gear set is provided on the two-speed gear set.
[0015] The gear on the input shaft 1 includes a fast drive gear 4 and a slow drive gear 5. The slow drive gear 5 is located at one end of the input shaft 1 and is integrally formed with the input shaft 1. A spline 6 is provided at the other end of the input shaft 1.
[0016] Further description: the two-speed gear set includes a gear shaft 7, on which are provided fast driven teeth 8 and slow driven teeth 9 respectively meshing with fast driving teeth 4 and slow driving teeth 5; on the gear shaft 7 and located outside the fast driven teeth 8, there are integrally formed transmission teeth 10 formed with the gear shaft 7; the transmission teeth 10 mesh with the output teeth 3.
[0017] In this utility model, the shifting mechanism includes a synchronous tooth 11 disposed on the gear shaft 7 and located between the fast driven tooth 8 and the slow driven tooth 9, a shift fork 12 disposed on the synchronous tooth 11, and a shift fork shaft 13 disposed at the upper end of the shift fork 12.
[0018] To ensure the stability of power transmission, the slow-speed driving tooth 5, the slow-speed driven tooth 9, the transmission tooth 10, and the output tooth 3 are all helical teeth. The width of the slow-speed driving tooth 5 is greater than that of the slow-speed driven tooth 9, and the width of the transmission tooth 10 is greater than that of the output tooth 3.
[0019] The invention works as follows: Power is transmitted through the input shaft 1, causing the input shaft 1 to rotate. The input shaft 1 drives the fast-moving drive gear 4 and the slow-moving drive gear 5 to rotate. The rotating fast-moving drive gear 4 and the slow-moving drive gear 5 respectively drive the fast-moving driven gear 8 and the slow-moving driven gear 9 to rotate. When a fast speed is needed, the shift fork 12 is engaged, causing the synchronizing gear 11 to mesh with the fast-moving driven gear 8. The rotation of the fast-moving driven gear 8 is transmitted to the synchronizing gear 11. The rotation of the synchronizing gear 11 then drives the gear shaft 7 to rotate. The rotation of the gear shaft 7 then drives the transmission gear 10 to rotate. The transmission gear 10 then drives the output gear 3 to rotate, thus transmitting the power. When a slow speed is needed, the shift fork 12 is engaged, causing the synchronizing gear 11 to mesh with the slow-moving driven gear 9. The rotation of the slow-moving driven gear 9 is transmitted to the synchronizing gear 11. The rotation of the synchronizing gear 11 then drives the gear shaft 7 to rotate. The rotation of the gear shaft 7 then drives the transmission gear 10 to rotate. The transmission gear 10 then drives the output gear 3 to rotate, thus transmitting the power.
Claims
1. An electric transmission for a three-wheeled vehicle, comprising an input shaft (1) and a differential (2) with output gears (3), characterized in that: The input shaft (1) is provided with a gear, and a two-speed gear set is provided between the input shaft (1) and the differential (2). The two-speed gear set is respectively engaged with the gear on the input shaft (1) and the differential (2); a shifting mechanism for moving the two-speed gear set is provided on the two-speed gear set.
2. The electric transmission for a three-wheeled vehicle as described in claim 1, characterized in that: The gear on the input shaft (1) includes a fast active gear (4) and a slow active gear (5) disposed on the input shaft (1). The slow active gear (5) is disposed at one end of the input shaft (1) and is integrally formed with the input shaft (1). A spline (6) is disposed at the other end of the input shaft (1).
3. The electric transmission for a three-wheeled vehicle as described in claim 2, characterized in that: The two-speed gear set includes a gear shaft (7), on which are provided fast driven teeth (8) and slow driven teeth (9) respectively meshing with fast driving teeth (4) and slow driving teeth (5); on the gear shaft (7) and outside the fast driven teeth (8), there are transmission teeth (10) integrally formed with the gear shaft (7); the transmission teeth (10) mesh with the output teeth (3).
4. The electric transmission for a three-wheeled vehicle as described in claim 3, characterized in that: The shifting mechanism includes a synchronizing gear (11) disposed on the gear shaft (7) and located between the fast driven gear (8) and the slow driven gear (9), a shift fork (12) disposed on the synchronizing gear (11), and a shift fork shaft (13) disposed at the upper end of the shift fork (12).
5. The electric transmission for a three-wheeled vehicle as described in claim 4, characterized in that: The slow-speed driving tooth (5), slow-speed driven tooth (9), transmission tooth (10) and output tooth (3) are all helical teeth. The width of the slow-speed driving tooth (5) is greater than that of the slow-speed driven tooth (9), and the width of the transmission tooth (10) is greater than that of the output tooth (3).