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1. 发明公开

EP4403789A1 POWER ASSEMBLY AND AUTOMOBILE 审中-公开
公开(公告)号：EP4403789A1
公开(公告)日：2024-07-24
申请号：EP23219008.2
申请日：2023-12-21
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： HONG, Jian , MA, Senlin , CHEN, Jian
IPC分类号： F16D3/64 , F16D3/68
CPC分类号： F16D3/64 , F16D3/68
摘要： A powertrain includes a motor, a reducer, and an elastic component. The reducer includes an input shaft, the motor includes an output shaft, the input shaft is coaxially coupled to the output shaft, a coupling end of the input shaft includes a first limiting platform and a first coupling surface, and a coupling end of the output shaft includes a second limiting platform and a second coupling surface. The first coupling surface and the second coupling surface are disposed opposite to each other along a radial direction of the input shaft, and the first coupling surface is in contact with the second coupling surface, so that the output shaft is in transmission connection with the input shaft. The first limiting platform and the second limiting platform are disposed opposite to each other along an axial direction of the input shaft. The elastic component is fastened between the first limiting platform and the second limiting platform. The first limiting platform and the second limiting platform are disposed opposite to each other along the axial direction of the input shaft, and the elastic component is disposed between the first limiting platform and the second limiting platform. The elastic component allows the motor to move axially in an operation process. Compared with a manner in which inner and outer rings of a bearing of a fixed motor are completely fastened, this reduces an assembly requirement of the motor and a design requirement of a housing

2. 发明公开

EP4262063A1 ELECTRIC MOTOR SHAFT, ELECTRIC MOTOR AND ELECTRIC VEHICLE 审中-实审
公开(公告)号：EP4262063A1
公开(公告)日：2023-10-18
申请号：EP22739009.3
申请日：2022-01-11
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： HU, Xiong , MEI, Xueyu , TANG, Zhengyi , MA, Senlin
IPC分类号： H02K7/00 , H02K5/16
摘要： This application provides a motor shaft, a motor, and an electric vehicle. The motor shaft includes a shaft body and an insulation coating. The shaft body includes a first mounting portion and a second mounting portion that are fastenedly connected. A positioning step surface is disposed at an end that is of the first mounting portion and that is close to the second mounting portion. The first mounting portion is configured to mount a rotor. The second mounting portion is covered with the insulation coating, and the second mounting portion is configured to mount a bearing. A resistivity of the insulation coating is not less than 10 7 Q m. In this way, a possibility that a shaft current is generated when a shaft voltage discharges and breaks down a lubricating oil film in the bearing to form a path can be effectively reduced. To be specific, the insulation coating can effectively block circulation of the shaft current between the motor shaft and the bearing, to reduce a possibility of abnormal operating noise of the motor due to electrical corrosion of the bearing, and effectively prolong a service life of the motor.

3. 发明公开

EP4368855A1 DIFFERENTIAL, POWERTRAIN, AND VEHICLE 审中-公开
公开(公告)号：EP4368855A1
公开(公告)日：2024-05-15
申请号：EP23207879.0
申请日：2023-11-06
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： HONG, Jian , MA, Senlin , CHEN, Jian
IPC分类号： F16H48/40
CPC分类号： F16H48/08 , F16H57/082 , F16H48/40 , F16H57/0483
摘要： This application provides a differential, a powertrain, and a vehicle. The differential includes a housing, three planetary gears, two side gears, and at least one window. The housing is configured to be fixedly connected to a main reduction gear, and the housing can rotate around an axial direction of the housing under a drive of the main reduction gear. Each of the three planetary gears is mounted on an inner wall of the housing through a pin shaft, the three planetary gears are disposed spaced from each other along a circumferential direction of the housing, and the circumferential direction of the housing is a direction of rotation of the housing. The two side gears are disposed on two sides of the three planetary gears along the axial direction of the housing and meshed with the three planetary gears. The main reduction gear drives the housing to rotate around the axial direction of the housing, so that the three planetary gears drive the two side gears to drive two drive shafts respectively. The at least one window penetrates through the housing and is located between axes of two adjacent planetary gears for inflow or outflow of coolant. The differential provided in this application has a good bearing capability and is easy to be cooled and lubricated.

4. 发明公开

EP4012902A1 MOTOR, POWERTRAIN, AND VEHICLE 有权
公开(公告)号：EP4012902A1
公开(公告)日：2022-06-15
申请号：EP21212975.3
申请日：2021-12-07
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： WANG, Ke , JIANG, Shenghai , LV, Lang , WEI, Zhiqi , XU, Guojie , MA, Senlin , MA, Wenwu
IPC分类号： H02K11/40 , H02K5/173 , H02K7/00
摘要： This application relates to the field of motor technologies, and in particular, to a motor, a powertrain, and a vehicle. The motor includes a housing, an output shaft, a conductive bearing, and a conductive component. The output shaft is disposed in the housing. A positioning hole is disposed on an end face of a first end of the output shaft, and the positioning hole is disposed coaxially with the output shaft. The conductive bearing is disposed in the positioning hole, the conductive bearing includes an inner ring and an outer ring, and the outer ring of the conductive bearing is fixedly connected to the output shaft. One end of the conductive component is fixedly connected to the inner ring of the conductive bearing, and the other end is connected to the housing. In this application, the motor can output, by using the conductive bearing and the conductive component, charges accumulated in the output shaft, to eliminate a generated common-mode voltage and prevent a bearing configured to support the output shaft from being electrically corroded.

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