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CN-224233491-U - Driving system and electric two-wheeled vehicle

CN224233491UCN 224233491 UCN224233491 UCN 224233491UCN-224233491-U

Abstract

The utility model discloses a driving system and an electric two-wheeled vehicle, which comprise a first shell, a motor body, a speed reducer body and a motor body, wherein a cooling structure is formed in the first shell, the cooling structure is configured to be used for a liquid cooling medium circulation controller, the liquid cooling medium circulation controller is arranged on the first shell and is thermally coupled with the cooling structure, the motor body is arranged on the first shell, is electrically connected with the controller, is thermally coupled with a second shell, is detachably connected with the first shell, is arranged on the second shell and is in transmission connection with the motor body, and a heat conduction interface is formed between the first shell and the second shell, so that heat of the speed reducer body is transmitted to the cooling structure through the second shell and the heat conduction interface. The utility model adopts the structure, has good cooling performance, and can cool the motor body, the controller and the speed reducer body at the same time.

Inventors

  • GAO XU
  • TANG LEI
  • ZHANG GUANGQUAN
  • XIA LI
  • ZHANG SHU

Assignees

  • 上海盘毂动力科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250513

Claims (10)

  1. 1. A drive system, comprising: a first housing (100) having a cooling structure formed therein, the cooling structure configured to allow circulation of a liquid cooling medium; A controller (200) disposed in the first housing (100) and thermally coupled to the cooling structure; a motor body (300) disposed in the first housing (100), electrically connected to the controller (200), and thermally coupled to the cooling structure; A second housing (400) detachably connected to the first housing (100); The speed reducer body (500) is arranged on the second casing (400) and is in transmission connection with the motor body (300); Wherein a thermally conductive interface is formed between the first housing (100) and the second housing (400) such that heat from the reducer body (500) is transferred to the cooling structure via the second housing (400) and the thermally conductive interface.
  2. 2. The drive system of claim 1, wherein the first housing (100) comprises: A front housing (110) comprising a first portion (111) and a second portion (112); -a rear housing (120) comprising a third portion (121) and a fourth portion (122), said front housing (110) and said rear housing (120) being adapted to be mutually spliced such that said first portion (111) and/or said third portion (121) form a control housing (130) housing said controller (200), said second portion (112) and said fourth portion (122) forming a motor housing (140) housing said motor body (300); Wherein, the cooling structure includes a first cooling cavity (151) at the control housing (130) and a second cooling cavity (152) at the motor housing (140), and the first cooling cavity (151) and the second cooling cavity (152) are communicated.
  3. 3. The drive system of claim 2, wherein the motor body (300) is a dual-stator single-rotor axial flux motor, the cooling structure further comprises a third cooling cavity (153) located at the motor casing (140), the third cooling cavity (153) is communicated with the second cooling cavity (152), and the third cooling cavity (153) and the second cooling cavity (152) are respectively arranged at two sides of the motor body (300) in the axial direction.
  4. 4. A drive system as claimed in claim 3, characterized in that the first cooling chamber (151) comprises a first inflow channel (1511) and a first return channel (1512), the second cooling chamber (152) comprises a second inflow channel (1521) and a second return channel (1522), the third cooling chamber (153) comprises a cooling channel (1531), the first inflow channel (1511), the second inflow channel (1521), the cooling channel (1531), the second return channel (1522) and one end of the first return channel (1512) are sequentially connected in series, a first liquid inlet (1513) is arranged at the other end of the first inflow channel (1511), and a first liquid outlet (1514) is arranged at the other end of the first return channel (1512).
  5. 5. The drive system of claim 4, wherein flow guiding structures are provided within each of the first cooling chamber (151), the second cooling chamber (152), and the third cooling chamber (153) to define the first inlet flow channel (1511), the first return flow channel (1512), the second inlet flow channel (1521), the second return flow channel (1522), and the cooling flow channel (1531), respectively.
  6. 6. The drive system according to claim 2, wherein the first portion (111) is recessed inwardly from an end face facing away from the rear housing (120) to form a first cooling channel (1111), the front housing (110) being provided with a front cover plate (171), the front cover plate (171) being adapted to cover the first cooling channel (1111), the first cooling channel (1111) and the front cover plate (171) cooperating to form the first cooling cavity (151); The third part (121) is recessed inwards from an end surface facing away from the front shell (110) to form a mounting groove (1211), the rear shell (120) is provided with a rear cover plate (172), and the rear cover plate (172) is suitable for covering the mounting groove (1211) to form a control cavity (162) for accommodating the controller (200); wherein a thermally conductive interface is formed between the control chamber (162) and the first cooling chamber (151).
  7. 7. The drive system of claim 2, wherein the second portion (112) is recessed inwardly from an end face facing away from the rear housing (120) to form a second cooling channel (1121), the front housing (110) being provided with a front cover plate (171), the front cover plate (171) being adapted to cover the second cooling channel (1121), the second cooling channel (1121) and the front cover plate (171) cooperating to form the second cooling cavity (152); The fourth part (122) is inwards recessed from the end face facing away from the front shell (110) to form a third cooling groove (1221), the rear shell (120) is provided with a rear cover plate (172), the rear cover plate (172) is suitable for sealing the third cooling groove (1221), the third cooling groove (1221) and the rear cover plate (172) are matched to form a third cooling cavity (153), and the third cooling cavity (153) is communicated with the second cooling cavity (152).
  8. 8. The drive system of claim 6 or 7, wherein the second housing (400) is provided at an end face of the front housing (110) facing away from the rear housing (120), comprising: A speed reducer case (410) for housing the speed reducer body (500); A middle bottom fork (420) integrated with the reducer casing (410); Wherein the reducer casing (410) and/or the middle bottom fork (420) are/is in contact with the front cover plate (171).
  9. 9. The drive system of claim 1, wherein the motor shaft (310) of the motor body (300) and the input shaft of the reducer body (500) are integrally formed, and the ratio of the axial thickness dimension of the motor body (300) to the axial thickness dimension of the reducer body (500) is 0.8:1 to 1.2:1.
  10. 10. An electric two-wheeled vehicle comprising a drive system according to any one of claims 1 to 9.

Description

Driving system and electric two-wheeled vehicle Technical Field The utility model relates to the technical field of electric vehicle driving, in particular to a driving system and an electric two-wheel vehicle. Background The driving system of the electric two-wheel vehicle is generally composed of a motor, a controller and a speed reducer, and when the electric two-wheel vehicle is in operation, the driving system generates heat, and the performance and the service life of the electric two-wheel vehicle are influenced by long-time high-temperature state. For example, chinese patent No. CN117748829a discloses an electric motor drive system with an air-cooled outer riser to cool the motor and controller. However, the adoption of the air cooling structure has relatively poor heat dissipation performance, and meanwhile, the speed reducer is difficult to effectively cool. Accordingly, there is a need for an improvement over the prior art to overcome the deficiencies described in the prior art. Disclosure of utility model The utility model aims to provide a driving system and an electric two-wheeled vehicle, which have good cooling performance and can cool a motor body, a controller and a speed reducer body at the same time. The utility model aims at realizing the following technical scheme that the driving system comprises: a first housing having a cooling structure formed therein, the cooling structure configured to allow circulation of a liquid cooling medium; a controller disposed in the first housing and thermally coupled to the cooling structure; The motor body is arranged on the first shell, is electrically connected with the controller and is thermally coupled with the cooling structure; the second shell is detachably connected with the first shell; The speed reducer body is arranged on the second shell and is in transmission connection with the motor body; and a heat conduction interface is formed between the first shell and the second shell, so that heat of the speed reducer body is transferred to the cooling structure through the second shell and the heat conduction interface. Further, the first housing includes: a front housing including a first portion and a second portion; A rear housing comprising a third portion and a fourth portion, the front housing and the rear housing being adapted to be mutually spliced such that the first portion and/or the third portion form a control housing the controller, the second portion and the fourth portion form a motor housing the motor body; The cooling structure comprises a first cooling cavity positioned at the control shell and a second cooling cavity positioned at the motor shell, and the first cooling cavity and the second cooling cavity are communicated. Further, the motor body is an axial flux motor with double stators and single rotor, the cooling structure further comprises a third cooling cavity positioned at the motor shell, the third cooling cavity is communicated with the second cooling cavity, and the third cooling cavity and the second cooling cavity are respectively arranged at two sides of the motor body in the axial direction. Further, the first cooling cavity comprises a first inflow channel and a first backflow channel, the second cooling cavity comprises a second inflow channel and a second backflow channel, the outlet end of the first inflow channel is connected with the inlet end of the second inflow channel, the third cooling cavity comprises a cooling channel, the first inflow channel, the second inflow channel, the cooling channel, the second backflow channel and one end of the first backflow channel are sequentially communicated in series, a first liquid inlet is formed in the other end of the first inflow channel, and a first liquid outlet is formed in the other end of the first backflow channel. Further, the first cooling cavity, the second cooling cavity and the third cooling cavity are respectively provided with a flow guiding structure, so that the first inflow channel, the first backflow channel, the second inflow channel, the second backflow channel and the cooling channel are respectively defined. Further, the first part is recessed inwards from the end face away from the rear shell to form a first cooling groove, the front shell is provided with a front cover plate, the front cover plate is suitable for sealing the first cooling groove, and the first cooling groove and the front cover plate are matched to form the first cooling cavity; The third part is inwards recessed from the end surface facing away from the front shell to form a mounting groove, the rear shell is provided with a rear cover plate, and the rear cover plate is suitable for sealing the mounting groove to form a control cavity for accommodating the controller; And a heat conduction interface is formed between the control cavity and the first cooling cavity, and the second shell is arranged on the end surface of the front shell, which is away from the rear shell