Transmission lubricating structure for electric vehicle

Abstract

The utility model discloses a transmission lubricating structure for an electric vehicle. The transmission lubricating structure comprises a frame, a hub, a motor and a wheel shaft, a transmission installation end cover is arranged at the end of a shell of the motor, a transmission installation cavity is formed in the transmission installation end cover, a transmission assembly is arranged in the transmission installation cavity and comprises a gear ring and a power output shaft disc, and the end of a rotating shaft of the motor is in meshing transmission with the gear ring. The wheel shaft penetrates through the transmission installation end cover and the power output shaft disc to be connected, the transmission installation cavity is a sealed cavity, lubricating oil is injected into the transmission installation cavity, and the gear ring and the power output shaft disc are partially located in the lubricating oil in the transmission installation cavity. The transmission connection structure between the output shaft of the motor and the hub is redesigned, the output shaft of the motor and the axle of the electric car are not traditionally coaxially mounted, and a transmission part between the motor and the hub can be immersed in lubricating oil, so that the transmission lubricating effect is improved, the transmission reliability is ensured, and the service life of the motor is prolonged. And meanwhile, rotation positioning between transmission parts is reliable and stable.

Description

Technical Field

[0001] This utility model belongs to the field of electric vehicle technology, specifically relating to a transmission lubrication structure for electric vehicles. Background Technology

[0002] Electric vehicles, including two-wheeled and three-wheeled models, are important means of transportation for urban and rural residents. The wheel hub is the core supporting component, connected to the frame via an axle, while the motor provides the driving power. In existing structural technologies, the motor is mounted on the wheel hub, the stator of the motor is mounted on the axle, and the rotor is fixedly mounted to the wheel hub, thus driving the hub to rotate during operation. Because the motor and axle are coaxially mounted in current technology, the rotating parts between the motor and axle can only be lubricated with grease. However, with increased use, the lubrication at the rotating joints deteriorates, affecting the performance of the electric vehicle. Therefore, it is essential to improve the existing structural design to address these shortcomings. Summary of the Invention

[0003] The purpose of this invention is to solve the problems mentioned in the background art and provide a transmission lubrication structure for electric vehicles.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a transmission lubrication structure for electric vehicles, including a frame, a hub, a motor, and an axle; a transmission mounting end cover is provided at the end of the motor housing, and a transmission mounting cavity is provided in the transmission mounting cavity, wherein a transmission assembly is provided, the transmission assembly including a gear ring and a power output shaft disc, the gear ring being fixedly connected to the power output shaft disc, the end of the motor shaft engaging with the gear ring for transmission, and the power output shaft disc being fixedly connected to the hub; the axle passes through the transmission mounting end cover and the power output shaft disc for connection, and the axle can rotate relative to the transmission mounting end cover and the power output shaft disc, while the motor is simultaneously fixedly connected to the frame through a rear end cover of the motor; the transmission mounting cavity is a sealed cavity filled with lubricating oil, and the gear ring and the power output shaft disc are partially immersed in the lubricating oil within the transmission mounting cavity.

[0005] In the above-mentioned transmission lubrication structure for electric vehicles, the power output shaft disc includes a mounting disc and an output shaft. The output shaft is rotatably connected to the wheel axle and the transmission mounting end cover via bearings. The gear ring is fixed in the mounting disc. The gear ring and the mounting disc are partially immersed in the lubricating oil in the transmission mounting cavity. The output shaft is fixedly connected to the wheel hub.

[0006] In the aforementioned transmission lubrication structure for an electric vehicle, the transmission mounting end cover includes a front mounting cover and a rear mounting cover. The front mounting cover and the rear mounting cover are sealed and fixedly connected to form a transmission mounting cavity, and the wheel axle passes through the front mounting cover and the rear mounting cover for connection.

[0007] In the aforementioned transmission lubrication structure for an electric vehicle, a positioning device is provided between the front mounting cover and the rear mounting cover, and the positioning device can form a side rolling contact with the mounting plate.

[0008] In the aforementioned transmission lubrication structure for an electric vehicle, the rear mounting cover and the motor housing are an integral structure, and the front mounting cover is fixedly connected to the rear mounting cover by bolts.

[0009] In the aforementioned transmission lubrication structure for an electric vehicle, the positioning device includes a mounting rod and a positioning bearing. The two ends of the mounting rod are fixedly mounted on the front mounting cover and the rear mounting cover, and the positioning bearing is mounted on the mounting rod. The positioning bearing can form a side rolling contact with the mounting plate.

[0010] In the aforementioned transmission lubrication structure for an electric vehicle, the output shaft is threaded and fixed to the wheel hub, and the direction of rotation of the output shaft is opposite to the direction of rotation of the wheel hub.

[0011] In the aforementioned transmission lubrication structure for an electric vehicle, the wheel hub includes a wheel hub connecting disc, a wheel hub bracket, and a wheel hub ring. The output shaft is tightened and fixed to the wheel hub connecting disc in the wheel hub. A fixed step is provided on the output shaft to fix and abut against the wheel hub connecting disc. A brake disc corresponding to the wheel hub connecting disc is installed on the wheel axle.

[0012] In the aforementioned transmission lubrication structure for electric vehicles, a dustproof sealing ring is provided between the wheel axle and the rear mounting cover, and a corresponding positioning boss and positioning groove are also provided between the wheel axle and the rear mounting cover.

[0013] In the above-mentioned transmission lubrication structure for electric vehicles, the hub connecting disc and the brake disc correspond to form a brake chamber. The brake disc is fixedly installed on the wheel axle. The gap between the brake disc and the output shaft, as well as the threaded connection between the output shaft and the hub connecting disc, are all located in the formed brake chamber.

[0014] By adopting the above-described technical solution, this utility model has the following beneficial effects:

[0015] In this utility model, the transmission connection structure between the motor output shaft and the wheel hub is redesigned. The motor output shaft and the wheel axle in the tram are not installed coaxially as in the traditional way. The transmission components between the motor and the wheel hub can be immersed in lubricating oil to improve the transmission lubrication effect and ensure the reliability of the transmission. At the same time, the rotational positioning between the transmission components is reliable and stable. Attached Figure Description

[0016] Figure 1 , Figure 2 These are perspective views of this utility model from two different directions;

[0017] Figure 3 This is a three-dimensional cross-sectional view of the present invention;

[0018] Figure 4 yes Figure 3 Enlarged view of part A;

[0019] Figure 5 yes Figure 3 Enlarged view of part B;

[0020] Figure 6 , Figure 7 These are perspective views of the transmission component in this utility model from two different directions. Detailed Implementation

[0021] The present invention will be further described in conjunction with the accompanying drawings.

[0022] Please see Figures 1 to 7 This utility model provides a transmission lubrication structure for electric vehicles, including a frame 1, a hub 2, a motor 3, and an axle 4. The motor 3 has a transmission mounting end cover 5 at its housing 3-1 end, and a transmission mounting cavity 6 is provided in the transmission mounting end cover 5. The transmission mounting cavity 6 is provided with a transmission assembly, which includes a gear ring 7 and a power output shaft disc 8. The power output shaft disc 8 includes a mounting disc 9 and an output shaft 10. The output shaft 10 is rotatably connected to the axle 4 and the transmission mounting end cover 5 through a bearing 11. The axle 4 passes through the transmission mounting end cover 5 and the power output shaft disc 8 for connection. The axle 4 can rotate relative to the transmission mounting end cover 5 and the power output shaft disc 8. The motor 3 is also fixedly connected to the frame 1 through the rear end cover 3-2 of the motor 3.

[0023] The gear ring 7 is fixed in the mounting plate 9, so that the gear ring 7 is fixedly connected to the power output shaft plate 8. The end of the motor 3's rotating shaft meshes with the gear ring 7 for transmission. The output shaft 10 in the power output shaft plate 8 is fixedly connected to the hub 2. The transmission mounting cavity 6 is a sealed cavity filled with lubricating oil. The gear ring 7 and the mounting plate 9 of the power output shaft plate 8 are partially immersed in the lubricating oil in the transmission mounting cavity 6. This provides lubrication and heat dissipation for the transmission.

[0024] Furthermore, the transmission mounting end cover 5 includes a front mounting cover 12 and a rear mounting cover 13. The front mounting cover 12 and the rear mounting cover 13 are sealed and fixedly connected to form a transmission mounting cavity 6. The wheel axle 4 passes through the front mounting cover 12 and the rear mounting cover 13 for connection. Preferably, the rear mounting cover 13 and the housing 3-1 of the motor 3 are an integral structure, and the front mounting cover 12 is fixedly connected to the rear mounting cover 13 by bolts.

[0025] Furthermore, a positioning device 14 is provided between the front mounting cover 12 and the rear mounting cover 13. The positioning device 14 includes a mounting rod 15 and a positioning bearing 16. The two ends of the mounting rod 15 are fixedly mounted on the front mounting cover 12 and the rear mounting cover 13. The positioning bearing 16 is mounted on the mounting rod 15 and can form a lateral rolling contact with the mounting disc 9. When the motor speed is low, there is a gap between the positioning bearing 16 and the mounting disc 9. However, when the motor is running at high speed, the mounting disc 9 generates a high-speed rotating centrifugal force, and the positioning bearing 16 can form a lateral rolling contact with the mounting disc 9, thereby improving the stability of the transmission.

[0026] Furthermore, the hub 2 includes a hub connecting plate 17, a hub bracket 18, and a hub ring 19. The output shaft 10 is tightened and fixed to the hub connecting plate 17 in the hub 2, and the direction of rotation of the output shaft 10 is opposite to the direction of rotation of the hub 2. This makes the transmission between the output shaft 10 and the hub 2 more secure, preventing loosening and detachment. At the same time, the output shaft 10 is provided with a fixing step 20 that is fixedly abutted against the hub connecting plate 17, which also serves as a positioning function for the secure connection.

[0027] Furthermore, a dustproof sealing ring 22 is provided between the axle 4 and the rear mounting cover 13, and corresponding positioning bosses 23 and positioning grooves 24 are also provided between the axle 4 and the rear mounting cover 13; a brake disc 21 corresponding to the hub connecting plate 17 is installed on the axle 4, and the corresponding relationship between the hub connecting plate 17 and the brake disc 21 forms a brake cavity 25. The brake disc 21 is fixedly installed on the axle 4, and the gap between the brake disc 21 and the output shaft 10, as well as the threaded connection between the output shaft 10 and the hub connecting plate 17, are all located in the formed brake cavity 25. The connection design provides a better dustproof effect for the transmission mounting cavity 6.

[0028] The above provides a detailed description of a transmission lubrication structure for electric vehicles provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the technical solution disclosed in this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A transmission lubrication structure for an electric vehicle, comprising a frame (1), a hub (2), a motor (3), and an axle (4); characterized in that: The motor (3) has a transmission mounting end cover (5) at the end of its housing (3-1). The transmission mounting end cover (5) has a transmission mounting cavity (6). The transmission mounting cavity (6) has a transmission assembly, which includes a gear ring (7) and a power output shaft disc (8). The gear ring (7) is fixedly connected to the power output shaft disc (8). The end of the motor (3)'s shaft (3-3) meshes with the gear ring (7) for transmission. The power output shaft disc (8) is fixedly connected to the wheel hub (2). The wheel axle (4) passes through the transmission mounting end cover (5) and the power output shaft disc (8) for connection. The wheel axle (4) can rotate relative to the transmission mounting end cover (5) and the power output shaft disc (8). The motor (3) is also fixedly connected to the frame (1) through the rear end cover (3-2) of the motor (3). The transmission mounting cavity (6) is a sealed cavity filled with lubricating oil. The gear ring (7) and the power output shaft disc (8) are partially submerged in the lubricating oil in the transmission mounting cavity (6).

2. The transmission lubrication structure for electric vehicles according to claim 1, characterized in that: The power output shaft disk (8) includes a mounting disk (9) and an output shaft (10). The output shaft (10) is rotatably connected to the wheel axle (4) and the transmission mounting end cover (5) through a bearing (11). The gear ring (7) is fixed in the mounting disk (9). The gear ring (7) and the mounting disk (9) are partially in the lubricating oil in the transmission mounting cavity (6). The output shaft (10) is fixedly connected to the wheel hub (2).

3. A transmission lubrication structure for an electric vehicle according to claim 1 or 2, characterized in that: The transmission mounting end cover (5) includes a front mounting cover (12) and a rear mounting cover (13). The front mounting cover (12) and the rear mounting cover (13) are sealed and fixedly connected to form a transmission mounting cavity (6). The axle (4) passes through the front mounting cover (12) and the rear mounting cover (13) for connection.

4. The transmission lubrication structure for an electric vehicle according to claim 3, characterized in that: A positioning device (14) is provided between the front mounting cover (12) and the rear mounting cover (13), and the positioning device (14) can roll against the mounting plate (9) from the side.

5. The transmission lubrication structure for an electric vehicle according to claim 3, characterized in that: The rear mounting cover (13) and the housing (3-1) of the motor (3) are an integral structure, and the front mounting cover (12) is fixedly connected to the rear mounting cover (13) by bolts.

6. The transmission lubrication structure for an electric vehicle according to claim 4, characterized in that: The positioning device (14) includes a mounting rod (15) and a positioning bearing (16). The two ends of the mounting rod (15) are fixedly mounted on the front mounting cover (12) and the rear mounting cover (13). The positioning bearing (16) is mounted on the mounting rod (15) and can roll against the mounting plate (9) from the side.

7. The transmission lubrication structure for an electric vehicle according to claim 2, characterized in that: The output shaft (10) is threaded and fixed to the hub (2), and the direction of rotation of the output shaft (10) is opposite to the direction of rotation of the hub (2).

8. The transmission lubrication structure for an electric vehicle according to claim 2, characterized in that: The hub (2) includes a hub connecting plate (17), a hub bracket (18), and a hub ring (19). The output shaft (10) is tightened and fixed to the hub connecting plate (17) in the hub (2). A fixed step (20) is provided on the output shaft (10) to abut against the hub connecting plate (17). A brake disc (21) corresponding to the hub connecting plate (17) is installed on the axle (4).

9. A transmission lubrication structure for an electric vehicle according to claim 3, characterized in that: A dustproof sealing ring (22) is provided between the axle (4) and the rear mounting cover (13), and a corresponding positioning boss (23) and positioning groove (24) are also provided between the axle (4) and the rear mounting cover (13).

10. A transmission lubrication structure for an electric vehicle according to claim 8, characterized in that: The hub connecting disc (17) and the brake disc (21) correspond to form a brake cavity (25). The brake disc (21) and the wheel axle (4) are fixedly installed. The gap between the brake disc (21) and the output shaft (10), as well as the threaded connection between the output shaft (10) and the hub connecting disc (17), are all located in the formed brake cavity (25).

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