Wheel edge coaxial electric drive system

Abstract

The utility model discloses a wheel edge coaxial electric drive system which comprises a motor shell, a controller, a motor and a speed reducer are arranged in the motor shell, the controller and the speed reducer are located at the two ends of the motor respectively, the integrated motor shell internally comprises the controller, the motor and the speed reducer, and a deep integrated electric drive system is formed. The driving system overcomes the inherent defects of a traditional electric motorcycle driving system, has the advantages of being large in reduction ratio, high in bearing capacity, flexible in configuration and the like, and meets market requirements.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric motorcycle driving, and more specifically relates to a wheel-side coaxial electric driving system. Background Art

[0002] An electric motorcycle is a type of electric vehicle that uses a reducer to reduce the torque of its motor and then increase the torque to drive the vehicle. Traditional electric motorcycle drive systems are usually a two-in-one structure of controller and motor or a two-in-one structure of motor and reducer. The subsystems are independent of each other through mechanical and electrical connections, which inevitably lead to inherent defects such as large size, high cost and low reliability. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a deeply integrated wheel-side coaxial electric drive system with the advantages of large reduction ratio, strong load-bearing capacity, flexible configuration, etc., which meets market demand.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a wheel-side coaxial electric drive system, comprising a motor housing, wherein a controller, a motor and a reducer are arranged in the motor housing, and the controller and the reducer are respectively located at both ends of the motor.

[0005] Furthermore, 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 cavity is formed between the motor housing, the motor end cover and the motor bearing mounting plate. The controller is located in the control cavity. 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.

[0006] Furthermore, the controller includes an electrical control module, an adapter and an encoder. The motor output wire 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.

[0007] Furthermore, 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, and a reduction gear pair is provided in the reduction cavity.

[0008] Furthermore, the reduction gear pair includes a primary reduction gear pair and a secondary reduction gear pair, the primary reduction gear pair includes a first pinion and a first large gear, the secondary reduction gear pair includes a second pinion and a second large gear, an output shaft is provided on the reducer end cover, an intermediate shaft is provided between the motor housing and the reducer end cover, the first pinion is connected to the front end of the motor main shaft, the first large gear and the second pinion are both connected to the intermediate shaft, and the second pinion is connected to the output shaft.

[0009] Furthermore, the motor main shaft and the output shaft are arranged coaxially, and a bearing is provided between the front end of the motor main shaft and the output shaft.

[0010] Furthermore, a plurality of heat dissipation fins are provided on the outer side of the motor end cover.

[0011] Compared with the existing technology, the beneficial effects of the present invention are: the present invention deeply integrates the independent subsystems together, and the drive system solves the inherent defects of the traditional electric motorcycle drive system, has the advantages of large reduction ratio, strong load-bearing capacity, flexible configuration, etc., and meets market demand; the controller is integrated at the left end of the motor by adjusting the appropriate structural form, the reducer adopts an axial gear structure, and the motor housing is an integrated structure including a controller cavity, a motor cavity and a reduction cavity, thereby forming a deeply integrated and integrated wheel-side coaxial electric drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the internal structure of the wheel-side coaxial electric drive system of the present invention;

[0013] Figure 2 This is a schematic diagram of the controller structure at the rear end of the motor housing in the wheel-side coaxial electric drive system of the present invention;

[0014] Figure 3 This is a schematic diagram of the reducer structure at the front end of the motor housing in the wheel-side coaxial electric drive system of the present invention.

[0015] Figure numerals: motor housing 1; controller 2; motor 3; reducer 4; motor end cover 5; motor bearing mounting plate 6; control chamber 7; electrical control module 8; adapter 9; encoder 10; reducer end cover 11; reduction chamber 12; motor chamber 13; bearing seat 14; oil seal 15; first pinion 16; first large gear 17; second pinion 18; second large gear 19; output shaft 20; intermediate shaft 21; connecting shaft 22; cooling fins 23. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. In the description of this utility model, "several" and "a number" mean two or more, unless otherwise specifically defined.

[0018] Reference Figures 1 to 3 The utility model is further described.

[0019] A wheel-side coaxial electric drive system includes a motor housing 1. A controller 2, a motor 3 and a reducer 4 are arranged in the motor housing 1. The controller 2 and the reducer 4 are respectively located at two ends of the motor 3.

[0020] like Figure 1 As shown, in this example, preferably, a motor end cover 5 is provided at the rear end of the motor housing 1, and a motor bearing mounting plate 6 is provided inside the motor housing 1. A sealed control cavity 7 is formed between 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 motor bearing mounting plate 6 is rotatably connected to the main shaft of the motor 3. 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 through a wire, and the wire passes through the motor bearing mounting plate 6.

[0021] like Figure 2 As shown, in this example, preferably, the controller 2 includes an electrical control module 8, an adapter 9 and an encoder 10. The output wire of the motor 3 passes through the motor bearing mounting plate 6 and is connected to the adapter 9. The adapter 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 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.

[0022] Specifically, the electrical control module 8 includes electrical components such as a PCB board, power components, filters, and connector components arranged symmetrically on both sides.

[0023] Specifically, the PCB board of the electrical control module 8 is attached to the motor end cover 5 through heat dissipation adhesive and fixed by screws.

[0024] like Figure 3 As shown, in this example, preferably, a reducer end cover 11 is provided at the front end of the motor housing 1, and 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.

[0025] like Figure 1 and Figure 3 As shown, specifically, a motor cavity 13 is provided in the motor housing 1, the motor 3 is located in the motor cavity 13, a bearing seat 14 is provided between the motor cavity 13 and the deceleration cavity 12, the main shaft of the motor 3 passes through the bearing seat 14, and an oil seal 15 is provided between the main shaft of the motor 3 and the bearing seat 14.

[0026] like Figure 3 As shown, in this example, preferably, the reduction gear pair includes a primary reduction gear pair and a secondary reduction gear pair, the primary reduction gear pair includes a first pinion 16 and a first large gear 17, the secondary reduction gear pair includes a second pinion 18 and a second large gear 19, an output shaft 20 is provided on the reducer end cover 11, an intermediate shaft 21 is provided between the motor housing 1 and the reducer end cover 11, the first pinion 16 is connected to the front end of the main shaft of the motor 3, the first large gear 17 and the second pinion 18 are both connected to the intermediate shaft 21, and the second pinion 18 is connected to the output shaft 20.

[0027] like Figure 3 As shown, in this example, preferably, the motor main shaft and the output shaft 20 are coaxially arranged, and a bearing is provided between the front end of the motor 3 main shaft and the output shaft 20.

[0028] like Figure 3 As shown, specifically, a connecting shaft 22 is provided on the main shaft of the motor 3, the first small gear 16 is located on the connecting shaft 22, a bearing groove is provided on the second large gear 19, a bearing is provided in the bearing groove, and the front end of the connecting shaft 22 is supported by the connecting shaft 22.

[0029] like Figure 2 As shown, in this embodiment, preferably, a plurality of heat dissipation fins 23 are provided on the outer side of the motor end cover 5 to improve the heat dissipation efficiency of the electrical control module 8 .

[0030] In this embodiment, the motor 3 is preferably a six-phase permanent magnet synchronous motor with a flat wire structure, but may also be a motor with other structures.

[0031] The present invention deeply integrates the independent subsystems together. The drive system solves the inherent defects of traditional electric motorcycle drive systems, has the advantages of large reduction ratio, strong load-bearing capacity, flexible configuration, etc., and meets market demand; the controller 2 is integrated at the left end of the motor 3 by adjusting the appropriate structural form, the reducer 4 adopts an axial gear structure, and the motor housing 1 is an integrated structure including the controller 2 cavity, the motor cavity 13 and the reduction cavity 12, thereby forming a deeply integrated and integrated wheel-side coaxial electric drive system.

[0032] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A wheel-side coaxial electric drive system, characterized by: The motor housing comprises a controller, a motor and a reducer, wherein the controller and the reducer are respectively located at two ends of the motor; A motor end cover is provided at the rear end of the motor housing, a motor bearing mounting plate is provided inside the motor housing, and a sealed control cavity is formed between the motor housing, the motor end cover and the motor bearing mounting plate, and the controller is located in the control cavity; 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, and a reduction gear pair is provided in the reduction cavity.

2. The wheel-side coaxial electric drive system according to claim 1, characterized in that: 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 via a wire, and the wire passes through the motor bearing mounting plate.

3. The wheel-side coaxial electric drive system according to claim 2, characterized in that: The controller includes an electrical control module, an adapter and an encoder. The motor output wire 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.

4. The wheel-side coaxial electric drive system according to claim 1, characterized in that: The reduction gear pair includes a primary reduction gear pair and a secondary reduction gear pair, the primary reduction gear pair includes a first pinion and a first large gear, the secondary reduction gear pair includes a second pinion and a second large gear, an output shaft is provided on the reducer end cover, an intermediate shaft is provided between the motor housing and the reducer end cover, the first pinion is connected to the front end of the motor main shaft, the first large gear and the second pinion are both connected to the intermediate shaft, and the second pinion is connected to the output shaft.

5. The wheel-side coaxial electric drive system according to claim 4, characterized in that: The motor main shaft and the output shaft are arranged coaxially, and a bearing is provided between the front end of the motor main shaft and the output shaft.

6. The wheel-side coaxial electric drive system according to claim 2, characterized in that: A plurality of heat dissipation fins are arranged on the outer side of the motor end cover.

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