An integrated system of drive motor and transmission for electric vehicles

Abstract

An integrated system of a drive motor and a transmission for an electric vehicle, comprising a drive motor (1) and a transmission (2). The drive motor (1) comprises a motor rotation shaft (11), a rotor assembly (12), a stator assembly (13), and a housing (14). The rotor assembly (12) is mounted on the rotation shaft (11). The stator assembly (13) and the housing (14) are mounted together and are nested outside the rotor assembly (12). The transmission (2) mainly comprises a front end cover (21) and a transmission rotation shaft (22). A bearing chamber (210) is disposed in the middle of the front end cover (21). A bearing (3) is mounted in the bearing chamber (210). An input end of the transmission rotation shaft (22) is supported on the bearing (3) of the front end cover (21). The front end cover (21) of the transmission (2) is mounted on a rear end surface of the housing (14) of the drive motor (1). The motor rotation shaft (11) and the transmission rotation shaft (22) are connected together. An output end of the motor rotation shaft (11) is supported on the bearing (3) of the front end cover (21) of the transmission (2). The axial size of the system can be reduced, the mounting structure of the whole vehicle can be optimized, few parts are used, the system weight and production cost can be reduced and the production efficiency can be improved.

Description

[0001] Technical field: [0002] The invention relates to an integrated system of a driving motor and a transmission of an electric vehicle. [0003] Background technique: [0004] The integrated system of the drive motor and the transmission of the existing electric vehicle includes a drive motor and a transmission. The drive motor includes a rotating shaft, a rotor assembly, a stator assembly, a casing, a front end cover and a rear end cover, and the rotor assembly is installed on the rotating shaft. The assembly is connected with the casing and nested outside the rotor assembly. The front end cover and the rear end cover are respectively installed at both ends of the casing. The rotating shaft is supported on the bearings of the front end cover and the rear end cover. The rear end cover is connected together, and the rotating shaft of the motor and the rotating shaft of the transmission are installed together through internal splines and external splines. However, this integ...

AI Technical Summary

Problems solved by technology

[0004] The integrated system of the drive motor and the transmission of the existing electric vehicle includes a drive motor and a transmission. The drive motor includes a rotating shaft, a rotor assembly, a stator assembly, a casing, a front end cover and a rear end cover, and the rotor assembly is installed on the rotating shaft. The assembly is connected with the casing and nested outside the rotor assembly. The front end cover and the rear end cover are respectively installed at both ends of the casing. The rotating shaft is supported on the bearings of the front end cover and the rear end cover. The rear end cover is connected together, and the rotating shaft of the motor and the rotating shaft of the transmission are installed together through internal splines and external splines. However, this integrated system has the following problems: 1) The axial dimension of the system is long, which affects the entire vehicle. 2) There are many components, which leads to low production efficiency and increases the weight and production cost of the system

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