Wheel edge coaxial electric drive system

Abstract

The invention 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 invention 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 is a means of transportation in which the motor torque is reduced in speed and increased in torque through a reducer to drive the vehicle. The traditional electric motorcycle drive system is usually a two-in-one structure of a controller and a motor or a two-in-one structure of a motor and a reducer. The subsystems are independent of each other through mechanical and electrical connections, and are inevitably subject to inherent defects such as large size, high cost, and low reliability. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a deeply integrated wheel-side coaxial electric drive system, which has the advantages of large reduction ratio, strong bearing capacity, flexible configuration, etc., and 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 two ends of the motor.

[0005] Furthermore, 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, 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.

[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] Further, 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 arranged on the outer side of the motor end cover.

[0011] Compared with the prior art, 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 the 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 It 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 It 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 cavity 7; electrical control module 8; adapter 9; encoder 10; reducer end cover 11; reduction cavity 12; motor cavity 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 directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., 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 narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0017] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "several" and "a number" mean two or more, unless otherwise clearly and specifically defined.

[0018] Reference Figures 1 to 3 The present invention is further described.

[0019] A wheel-side coaxial electric drive system comprises a motor housing 1, wherein a controller 2, a motor 3 and a reducer 4 are arranged in the motor housing 1, and 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, a motor bearing mounting plate 6 is provided inside the motor housing 1, a sealed control chamber 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 chamber 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 via 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, a power component, a filter, and connector components symmetrically arranged on both sides.

[0023] Specifically, the PCB board of the electrical control module 8 is attached to the motor end cover 5 by means of heat dissipation adhesive and is 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, a reduction chamber 12 is formed between the reducer end cover 11 and the motor housing 1, and a reduction gear pair is provided in the reduction chamber 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 reduction 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 arranged coaxially, and a bearing is provided between the front end of the main shaft of the motor 3 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 connected to the bearing.

[0029] like Figure 2 As shown, in this example, 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 example, the motor 3 is preferably a six-phase permanent magnet synchronous motor with a flat wire structure, and 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 the traditional electric motorcycle drive system, has the advantages of large reduction ratio, strong load-bearing capacity, flexible configuration, etc., and meets the 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 is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A wheel-side coaxial electric drive system, characterized in that: The invention comprises a motor housing, in which a controller, a motor and a reducer are arranged, and the controller and the reducer are respectively located at two ends of the motor.

2. The wheel-side coaxial electric drive 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.

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 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.

4. The wheel-side coaxial electric drive 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.

5. The wheel-side coaxial electric drive system according to claim 4, 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 arranged on the reducer end cover, an intermediate shaft is arranged 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.

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

7. 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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