A liquid-cooled wheel motor

Abstract

The utility model relates to a kind of liquid-cooled wheel edge motor, including rotor device, stator device and rear end cover;The stator device is sleeved in rotor device outside;The rear end cover is set in the rear end of rotor device and stator device;The rotor device includes rotor core and rotor shaft;The rotor core is sleeved in rotor shaft outside;The stator device includes winding stator core and inner sleeve;The winding stator core is sleeved in rotor core outside;The inner sleeve is sleeved in winding stator core outside;Cooling liquid channel is set on the inner sleeve;The rear end cover is connected with inner sleeve by fastener;The liquid-cooled wheel edge motor of the utility model adopts liquid cooling heat dissipation mode, and high-efficiency heat dissipation is realized by cooling liquid circulation loop;Through reasonable component layout, the number of components is reduced, the installation complexity is reduced, and the production efficiency and product quality are improved.

Description

Technical Field

[0001] This utility model relates to a wheel-side motor, and more particularly to a liquid-cooled wheel-side motor with water channels, belonging to the field of motor technology. Background Technology

[0002] In the field of wheel-side motors, traditional air-cooled heat dissipation structures are difficult to meet the heat dissipation requirements of high-power motors, which can easily lead to a decrease in motor power, severe demagnetization, and even burn out the enameled wire, causing the motor to be scrapped. In addition, conventional wheel-side motors have complex structures, a large number of parts, and complicated installation, which affects the production schedule.

[0003] To address the heat dissipation problem, several improvements have been proposed. For example, patent 201710824487.9, "A Wind-Cooled Servo Motor," discloses a servo motor that improves cooling efficiency by adding a cooling fan and creating a reasonable airflow through structural changes. However, this only achieves localized heat dissipation, and the overall cooling effect remains poor, especially when operating in high-temperature environments. Furthermore, structural changes may lead to a decrease in the overall performance of the motor, making it difficult to simultaneously meet stringent requirements such as high power and low noise.

[0004] Therefore, a design that can effectively solve the heat dissipation problem of wheel-side motors, while simplifying the structure and reducing costs, becomes particularly important. It should ensure high power output of the motor, provide efficient heat dissipation performance, and be easy to manufacture and install. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art by providing a liquid-cooled wheel-side motor with a simplified structure, reduced number of parts, and lower installation complexity.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a liquid-cooled wheel-side motor, comprising a rotor assembly, a stator assembly, and a rear end cover; the stator assembly is sleeved outside the rotor assembly; the rear end cover is located at the rear end of the rotor assembly and the stator assembly; the rotor assembly includes a rotor core, a rotor shaft, and a rear bearing; the rotor core is sleeved outside the rotor shaft; the rear bearing is sleeved at the rear end of the rotor shaft; the stator assembly includes a wound stator core and an inner sleeve; the wound stator core is sleeved outside the rotor core; the inner sleeve is sleeved outside the wound stator core; a coolant channel is formed on the inner sleeve; the rear end cover is connected to the inner sleeve by fasteners.

[0007] Preferably, the rear end cover has a receiving cavity, and an encoder is installed in the receiving cavity.

[0008] Preferably, a junction box is provided outside the rear end cover.

[0009] Preferably, it also includes a client base device; the client base device is disposed at the front end of the rotor device and the stator device.

[0010] Preferably, the client base assembly includes a client base, a client output shaft, a front bearing, and a bearing sleeve; the client base is located at the front end of the rotor assembly and the stator assembly, and cooperates with the inner sleeve to form a liquid cooling system; the client output shaft is sleeved outside the rotor shaft; the client output shaft is sleeved with a front bearing and a bearing sleeve, and the bearing sleeve is used to press the front bearing.

[0011] Preferably, a water channel sealing ring is provided between the client base and the coolant channel.

[0012] Preferably, the client output shaft and the rotor shaft are connected by spline engagement.

[0013] Preferably, a wave washer is provided between the client output shaft and the rotor shaft in the axial direction.

[0014] Preferably, a positioning sleeve is provided between the client output shaft and the rotor shaft in the radial direction.

[0015] Preferably, the positioning bushing is a wear-resistant bushing made of wear-resistant material.

[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0017] 1. It adopts liquid cooling heat dissipation method, and achieves efficient heat dissipation through coolant circulation loop, which effectively solves the problem that traditional air cooling heat dissipation structure cannot meet the heat dissipation requirements of high-power motors, and significantly improves the heat dissipation efficiency of motors;

[0018] 2. The motor structure is simplified. The front cover of the motor is eliminated. The car manufacturer (customer) integrates the wheel-side motor body, front cover and other components into the customer's mounting device, which is installed in conjunction with the motor. Through reasonable component layout, the number of components is reduced, the installation complexity is reduced, and the production efficiency and product quality are improved.

[0019] 3. By installing a front bearing on the client-side frame, the problem of insufficient stator strength in traditional structures is avoided, thus improving the long-term performance of the motor.

[0020] 4. By installing a wear-resistant positioning bushing between the motor rotor shaft and the client output shaft radially, the coaxiality deviation between the front and rear bearings is effectively compensated, significantly reducing the wear at the mating point between the motor shaft and the client output shaft, and improving the service life and overall performance of the motor.

[0021] 5. By installing a wave washer between the motor rotor shaft and the client output shaft, axial preload is provided to eliminate the gap between the motor shaft and the client output shaft, and to improve the rigidity and positioning accuracy of the front and rear bearings, thereby suppressing bearing vibration and noise and extending bearing life. Attached Figure Description

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0023] Appendix Figure 1 This is a schematic diagram of the rear end portion of the liquid-cooled wheel-side motor of this utility model;

[0024] Appendix Figure 2 This is a structural schematic diagram of the liquid-cooled wheel-side motor of this utility model in its assembled state;

[0025] The components are: 1. Rear end cover; 2. Rotor core; 3. Rotor shaft; 4. Stator core with windings; 5. Inner sleeve; 6. Coolant passage; 7. Fastener; 8. Client base; 9. Client output shaft; 10. Front bearing; 11. Bearing sleeve; 12. Water channel seal ring; 13. Shaft sleeve; 14. Encoder; 15. Junction box; 16. Waveform washer; 17. Rear bearing. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] As attached Figure 1 , 2 As shown, the liquid-cooled wheel-side motor of this utility model includes a rotor assembly, a stator assembly, and a rear end cover 1. The stator assembly is sleeved outside the rotor assembly. The rear end cover is located at the rear end of the rotor assembly and the stator assembly. The rotor assembly includes a rotor core 2, a rotor shaft 3, and a rear bearing 17. The rotor core 2 is sleeved outside the rotor shaft 3. The rear bearing 17 is sleeved at the rear end of the rotor shaft 3. The stator assembly includes a wound stator core 4 and an inner sleeve 5. The wound stator core 4 is sleeved outside the rotor core 2. The inner sleeve 5 is sleeved outside the wound stator core 4. Cooling fluid channels 6 are provided on the inner sleeve. The rear end cover 1 is connected to the inner sleeve 4 by fasteners 7.

[0028] The rotor assembly, stator assembly, and rear end cover 1 are structures provided by the motor manufacturer, referred to as the rear end of the motor. The vehicle manufacturer (customer) integrates the wheel-side motor body, front end cover, etc., into a customer-side mounting assembly. This customer-side mounting assembly is located at the front end of the rotor and stator assemblies. It includes a customer-side mounting base 8, a customer-side output shaft 9, a front bearing 10, and a bearing sleeve 11. The customer-side mounting base 8, located at the front end of the rotor and stator assemblies, cooperates with the inner sleeve 5, forming a liquid cooling system through the coolant channels. Generally, the coolant inlet is located on the customer-side mounting base 8, and the coolant outlet is located on the rear end cover 1. The coolant inlet and outlet are connected to the coolant channels, forming a coolant circulation loop, achieving efficient heat dissipation. To increase sealing performance, a water channel sealing ring 12 is provided between the customer-side mounting base 8 and the coolant channel 6. The customer-side output shaft 9 is sleeved outside the rotor shaft 3. The customer-side output shaft 9 is sleeved with the front bearing 10 and the bearing sleeve 11, with the bearing sleeve 11 used to press the front bearing 10.

[0029] In use, the motor manufacturer's back-end components are installed in conjunction with the vehicle manufacturer's client-side mounting base, simplifying the motor structure. Through a reasonable layout of motor components, the number of components is reduced, installation complexity is lowered, and production efficiency and product quality are improved.

[0030] In the preferred embodiment, a positioning sleeve 13 is provided radially between the client output shaft 9 and the rotor shaft 3. The positioning sleeve 13 is a wear-resistant sleeve made of wear-resistant material, which effectively compensates for the coaxiality deviation between the front and rear bearings, significantly reduces the wear at the mating point between the motor shaft and the client output shaft, and improves the service life and overall performance of the motor. The wear-resistant material includes, but is not limited to, fluororubber, with a thickness of generally 1-10mm. The client output shaft 9 and the rotor shaft 3 are connected by spline meshing. A wave washer 16 is provided axially between the client output shaft 9 and the rotor shaft 3 to provide axial preload, thereby eliminating the gap between the motor shaft and the client output shaft and improving the rigidity and positioning accuracy of the front and rear bearings, thus achieving the effect of suppressing bearing vibration and noise and extending bearing life.

[0031] As a complete solution, the rear cover 1 has a receiving cavity inside, and an encoder 14 is installed inside the receiving cavity; the rear cover 1 has a junction box 15 outside.

[0032] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model; all technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of this utility model.

Claims

1. A liquid-cooled wheel-side motor, characterized in that: The device includes a rotor assembly, a stator assembly, and a rear end cover. The stator assembly is fitted over the rotor assembly. The rear end cover is located at the rear end of both the rotor assembly and the stator assembly. The rotor assembly includes a rotor core, a rotor shaft, and a rear bearing. The rotor core is fitted over the rotor shaft. The rear bearing is fitted over the rear end of the rotor shaft. The stator assembly includes a wound stator core and an inner sleeve. The wound stator core is fitted over the rotor core. The inner sleeve is fitted over the wound stator core. Coolant channels are provided on the inner sleeve. The rear end cover is connected to the inner sleeve by fasteners.

2. The liquid-cooled wheel-side motor according to claim 1, characterized in that: The rear end cover has a receiving cavity, and an encoder is installed in the receiving cavity.

3. A liquid-cooled wheel-side motor according to claim 2, characterized in that: A junction box is provided on the outside of the rear cover.

4. A liquid-cooled wheel-side motor according to any one of claims 1-3, characterized in that: It also includes a client base device; the client base device is located at the front end of the rotor device and the stator device.

5. A liquid-cooled wheel-side motor according to claim 4, characterized in that: The client base assembly includes a client base, a client output shaft, a front bearing, and a bearing sleeve; the client base is located at the front end of the rotor assembly and the stator assembly, and cooperates with the inner sleeve to form a liquid cooling system through the cooling fluid channels; the client output shaft is sleeved outside the rotor shaft; the client output shaft is sleeved with a front bearing and a bearing sleeve, and the bearing sleeve is used to press the front bearing.

6. A liquid-cooled wheel-side motor according to claim 5, characterized in that: A water channel sealing ring is provided between the client base and the coolant channel.

7. A liquid-cooled wheel-side motor according to claim 6, characterized in that: The client output shaft and the rotor shaft are connected by spline engagement.

8. A liquid-cooled wheel-side motor according to claim 7, characterized in that: A wave-shaped washer is provided between the client output shaft and the rotor shaft in the axial direction.

9. A liquid-cooled wheel-side motor according to claim 8, characterized in that: A positioning sleeve is provided between the client output shaft and the rotor shaft radially.

10. A liquid-cooled wheel-side motor according to claim 9, characterized in that: The positioning bushing is a wear-resistant bushing made of wear-resistant material.

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