Driving system of electric motorcycle

Abstract

The utility model discloses an electric motorcycle driving system which comprises a rear bottom fork support connected with a motorcycle frame, a motor shell is arranged on one side of the rear bottom fork support, a controller, a motor and a speed reducer are arranged in the motor shell, and the controller and the speed reducer are located at the two ends of the motor respectively. An output shaft is arranged on the speed reducer, a hub is arranged on the output shaft, the output shaft is rotationally connected with the other side of the rear fork support, and the integrated driving system improves the overall transmission efficiency; meanwhile, the transmission proportion can be optimized, and the system efficiency is further improved; the cost of the driving system is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric motorcycle drive, and more specifically relates to an electric motorcycle drive system. Background Art

[0002] With the wide application of new technologies, people's requirements for electric motorcycles are also increasing day by day. The traditional electric motorcycle drive system usually consists of a controller, a motor integrated structure or a motor and a reducer integrated structure, and adopts a drive mode with a parallel shaft type gear reduction mechanism. They are mechanically and electrically connected to each other, and each subsystem is independent. The integration degree of the drive assembly is insufficient, with large volume, high cost and low reliability. Moreover, the cooperation efficiency between the traditional mechanical components is relatively low, and problems such as energy loss and unstable control are prone to occur, which also increases the maintenance cost. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides an electric motorcycle drive system to improve the transmission efficiency and reduce the cost of the drive system.

[0004] To achieve the above object, the utility model provides the following technical solution: An electric motorcycle drive system includes a rear swingarm bracket connected to the motorcycle frame. On one side of the rear swingarm bracket, there is a motor housing. Inside the motor housing, there are a controller, a motor and a reducer. The controller and the reducer are respectively located at both ends of the motor. An output shaft is provided on the reducer, and a hub is provided on the output shaft. The output shaft is rotatably connected to the other side of the rear swingarm bracket.

[0005] Further, a spacer sleeve is provided on the output shaft, and the spacer sleeve is located between the hub and the rear swingarm bracket.

[0006] Further, the rear swingarm bracket includes a fixed bracket connected to the motorcycle frame. Both ends of the fixed bracket are respectively connected to a motor bracket and a right swingarm bracket. The motor housing is connected to the motor bracket, the output shaft is rotatably connected to the right swingarm bracket, and the spacer sleeve is located between the hub and the right swingarm bracket.

[0007] Further, a motor end cover is provided at the rear end of the motor housing. Inside the motor housing, there is a motor bearing mounting plate. A sealed control cavity is formed among the motor housing, the motor end cover and the motor bearing mounting plate. The controller is located in the control cavity. The motor spindle is rotatably connected to the motor bearing mounting plate, and a bearing is provided between the motor spindle and the motor bearing mounting plate. The motor and the controller are electrically connected through a wire, and the wire passes through the motor bearing mounting plate.

[0008] Further, the controller includes an electrical control module, a adapter base, and an encoder. The motor lead wire passes through the motor bearing mounting plate and then connects to the adapter base. The adapter base is electrically connected to the electrical control module. The electrical control module is connected to the motor end cover. The adapter base is connected to the motor bearing mounting plate. The encoder is connected to the motor bearing mounting plate and is located at the rear end of the motor main shaft.

[0009] Further, a reducer end cover is provided at the front end of the motor housing. A reduction cavity is formed between the reducer end cover and the motor housing. A reduction gear pair is provided in the reduction cavity.

[0010] Further, the reduction gear pair includes a central gear, a plurality of planetary gears, and an internal gear ring. The central gear is connected to the motor main shaft. The internal gear ring is fixedly connected to the inner wall of the motor housing. The two sides of the planetary gear are respectively meshed with the central gear and the internal gear ring. A planetary carrier is provided on the output shaft. The planetary carrier is connected to the plurality of planetary gears. A bearing is provided between the planetary gear and the planetary carrier.

[0011] Further, the motor main shaft, the output shaft, and the internal gear ring are coaxially arranged.

[0012] Further, a plurality of heat dissipation fins are provided on the outer side of the motor end cover.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The controller, the motor, and the reducer of the present drive system are tightly coupled, reducing the energy loss during the transmission process. This design reduces the friction and energy conversion loss in the transmission system, thereby improving the overall transmission efficiency. At the same time, the transmission ratio can be optimized to further improve the system efficiency. It has the characteristics of integration and high efficiency, and reduces the cost of the drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the drive system of the electric motorcycle of the present utility model

[0015] Figure 2 is a schematic internal structure diagram of the integrated motor in the drive system of the electric motorcycle of the present utility model;

[0016] Figure 3 is a schematic structural diagram of the controller at the rear end of the motor housing in the drive system of the electric motorcycle of the present utility model;

[0017] Figure 4 is a schematic structural diagram of the reducer at the front end of the motor housing in the drive system of the electric motorcycle of the present utility model.

[0018] Reference numerals: motor housing 1; controller 2; motor 3; reducer 4; motor end cover 5; motor bearing mounting plate 6; control cavity 7; electrical control module 8; adapter seat 9; encoder 10; reducer end cover 11; reduction cavity 12; motor cavity 13; bearing seat 14; oil seal 15; central gear 16; planetary gear 17; internal gear ring 18; planetary carrier 19; output shaft 20; connecting shaft 21; heat dissipation fins 22; hub 23; spacer 24; fixed bracket 25; motor bracket 26; right flat fork bracket 27. Detailed implementation

[0019] In the description of the present invention, it should be noted that for orientation terms, if there are terms such as "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

[0020] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meanings of "several" and "a number of" are two or more, unless otherwise specifically defined.

[0021] Refer to Figures 1 to 4 For further description of the present invention.

[0022] An electric motorcycle drive system includes a rear flat fork bracket connected to the motorcycle frame. On one side of the rear flat fork bracket, there is a motor housing 1. Inside the motor housing 1, there are a controller 2, a motor 3, and a reducer 4. The controller 2 and the reducer 4 are respectively located at both ends of the motor 3. An output shaft 20 is provided on the reducer 4. A hub 23 is provided on the output shaft 20. The output shaft 20 is rotatably connected to the other side of the rear flat fork bracket.

[0023] As Figure 1 described, preferably in this embodiment, a spacer 24 is provided on the output shaft 20, and the spacer 24 is located between the hub 23 and the rear flat fork bracket.

[0024] As Figure 1As described above, preferably in this embodiment, the rear swingarm bracket includes a fixed bracket 25 which is connected to the motorcycle frame. Both ends of the fixed bracket 25 are respectively connected to a motor bracket 26 and a right swingarm bracket 27. The motor housing 1 is connected to the motor bracket 26. The output shaft 20 is rotatably connected to the right swingarm bracket 27. The spacer sleeve 24 is located between the wheel hub 23 and the right swingarm bracket 27.

[0025] Specifically, a bearing hole is provided on the right swingarm bracket 27. The output shaft 20 passes through the bearing hole, and a bearing is provided in the bearing hole and is connected to the output shaft 20.

[0026] Specifically, both ends of the fixed bracket 25 are respectively connected to the motor bracket 26 and the right swingarm bracket 27 by bolts.

[0027] As Figure 2 described above, preferably in this embodiment, a motor end cover 5 is provided at the rear end of the motor housing 1. A motor bearing mounting plate 6 is provided inside the motor housing 1. A sealed control cavity 7 is formed among the motor housing 1, the motor end cover 5 and the motor bearing mounting plate 6. The controller 2 is located in the control cavity 7. The main shaft of the motor 3 is rotatably connected to the motor bearing mounting plate 6, and a bearing is provided between the main shaft of the motor 3 and the motor bearing mounting plate 6. The motor 3 and the controller 2 are electrically connected by a wire, and the wire passes through the motor bearing mounting plate 6.

[0028] As Figure 3 shown, preferably in this embodiment, the controller 2 includes an electrical control module 8, an adapter base 9 and an encoder 10. The outgoing line of the motor 3 passes through the motor bearing mounting plate 6 and then is connected to the adapter base 9. The adapter base 9 is electrically connected to the electrical control module 8. The electrical control module 8 is connected to the motor end cover 5. The adapter base 9 is connected to the motor bearing mounting plate 6. The encoder 10 is connected to the motor bearing mounting plate 6 and is located at the rear end of the main shaft of the motor 3.

[0029] Specifically, the electrical control module 8 includes electrical components such as a PCB board, a power component, a filter and plug-in components symmetrically arranged on both sides.

[0030] Specifically, the PCB board of the electrical control module 8 is attached to the motor end cover 5 by heat dissipation glue and fixed by screws.

[0031] As Figure 3 shown, preferably in this embodiment, a reducer end cover 11 is provided at the front end of the motor housing 1. A reduction cavity 12 is formed between the reducer end cover 11 and the motor housing 1. A reduction gear pair is provided in the reduction cavity 12 to reduce the output speed and increase the torque.

[0032] As Figure 2 and Figure 4As shown in the figure, specifically, a motor cavity 13 is provided inside the motor housing 1. The motor 3 is located inside the motor cavity 13. A bearing seat 14 is provided between the motor cavity 13 and the reduction cavity 12. The main shaft of the motor 3 passes through the bearing seat 14, and a oil seal 15 is provided between the main shaft of the motor 3 and the bearing seat 14.

[0033] As Figure 4 shown in the figure, preferably in this embodiment, the reduction gear pair includes a central gear 16, several planetary gears 17 and an internal gear ring 18. The central gear 16 is connected to the main shaft of the motor 3. The internal gear ring 18 is fixedly connected to the inner wall of the motor housing 1. The two sides of the planetary gear 17 are respectively meshed with the central gear 16 and the internal gear ring 18. A planetary carrier 19 is provided on the output shaft 20. The planetary carrier 19 is connected to several planetary gears 17. A bearing is provided between the planetary gear 17 and the planetary carrier 19.

[0034] As Figure 4 shown in the figure, preferably in this embodiment, the main shaft of the motor 3, the output shaft 20 and the internal gear ring 18 are coaxially arranged.

[0035] As Figure 4 shown in the figure, specifically, a connecting shaft 21 is provided on the main shaft of the motor 3, and the central gear 16 is located on the connecting shaft 21.

[0036] As Figure 3 shown in the figure, preferably in this embodiment, several heat dissipation fins 22 are provided on the outer side of the motor end cover 5 to improve the heat dissipation efficiency of the electrical control module 8.

[0037] Preferably in this embodiment, the motor 3 is a flat wire structure six-phase permanent magnet synchronous motor 3, or it can also be a motor 3 with other structures.

[0038] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. An electric motorcycle driving system, characterized in that: It comprises a rear fork bracket connected to a motorcycle frame, wherein a motor housing is arranged on one side of the rear fork bracket, a controller, a motor and a reducer are arranged in the motor housing, the controller and the reducer are respectively located at two ends of the motor, an output shaft is arranged on the reducer, a wheel hub is arranged on the output shaft, and the output shaft is rotatably connected to the other side of the rear fork bracket.

2. The electric motorcycle driving system according to claim 1, characterized in that: The output shaft is provided with a spacer sleeve, and the spacer sleeve is located between the wheel hub and the rear flat fork bracket.

3. The electric motorcycle driving system according to claim 2, characterized in that: The rear fork bracket includes a fixed bracket, which is connected to the motorcycle frame, the two ends of the fixed bracket are respectively connected to the motor bracket and the right fork bracket, the motor housing is connected to the motor bracket, the output shaft is rotatably connected to the right fork bracket, and the spacer is located between the wheel hub and the right fork bracket.

4. The electric motorcycle driving system according to claim 1, characterized in that: A motor end cover is provided at the rear end of the motor housing, and a motor bearing mounting plate is provided inside the motor housing. A sealed control chamber is formed between the motor housing, the motor end cover and the motor bearing mounting plate. The controller is located in the control chamber. The motor bearing mounting plate is rotatably connected to the motor main shaft. A bearing is provided between the motor main shaft and the motor bearing mounting plate. The motor and the controller are electrically connected through a wire, and the wire passes through the motor bearing mounting plate.

5. The electric motorcycle driving system according to claim 4, characterized in that: The controller includes an electrical control module, an adapter and an encoder. The motor output line passes through the motor bearing mounting plate and is connected to the adapter. The adapter is electrically connected to the electrical control module. The electrical control module is connected to the motor end cover. The adapter is connected to the motor bearing mounting plate. The encoder is connected to the motor bearing mounting plate and is located at the rear end of the motor spindle.

6. The electric motorcycle driving system according to claim 1, characterized in that: A reducer end cover is arranged at the front end of the motor housing, a reduction cavity is formed between the reducer end cover and the motor housing, and a reduction gear pair is arranged in the reduction cavity.

7. The electric motorcycle driving system according to claim 6, characterized in that: The reduction gear pair includes a central gear, a plurality of planetary gears and an inner ring gear, the central gear is connected to the motor main shaft, the inner ring gear is fixedly connected to the inner wall of the motor housing, the two sides of the planetary gears are respectively meshed with the central gear and the inner ring gear, a planetary bracket is arranged on the output shaft, the planetary bracket is connected to the plurality of planetary gears, and bearings are arranged between the planetary gears and the planetary bracket.

8. The electric motorcycle driving system according to claim 7, characterized in that: The motor main shaft, output shaft and inner gear ring are coaxially arranged.

9. The electric motorcycle driving system according to claim 4, characterized in that: A plurality of heat dissipation fins are arranged on the outer side of the motor end cover.

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