Integrated driving device for two-level electric vehicle

Abstract

The invention relates to an integrated driving device for a two-level electric vehicle. The integrated driving device is composed of a driving motor, a transmission and a differential mechanism. The transmission comprises an input shaft and an intermediate shaft. An intermediate shaft gear, a first-level reduction gear, a synchronizer and a second-level reduction gear are sequentially arranged on the intermediate shaft from right to left. A first spline, a second spline, a first-level gear and a second-level gear are sequentially arranged on the input shaft from right to left. An output shaft of the driving motor is connected to the first spline of the input shaft of the transmission. The second spline is fixedly sleeved with a parking gear. The first-level reduction gear is meshed with the first-level gear. The second-level reduction gear is meshed with the second-level gear. The second-level reduction gear and the differential mechanism are integrated. The second-level reduction gear is fixedly arranged on a differential mechanism shell in a sleeving mode and meshed with the intermediate shaft gear. Two axle shaft gears are fixedly into the differential mechanism shell. The axle shaft gears are connected with vehicle axle shaft splines. The integrated driving device has the advantages of being compact in structure and high in integration, and the performance of the electric vehicle is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of driving devices for electric vehicles, and in particular relates to an integrated driving device for two-speed electric vehicles. Background technique [0002] Automobile exhaust is considered to be one of the main culprits for the increase in global greenhouse gas emissions, frequent occurrence of smog and increasingly prominent environmental problems. With the continuous consumption of petroleum energy and the introduction of increasingly stringent emission regulations, new energy vehicles as an emission Small, less polluting vehicles have been widely valued by various OEMs, and the development of new energy vehicles has become an urgent task for the automotive industry. In addition to the engine, transmission, reducer, differential and other components of traditional vehicles, the powertrain of new energy vehicles also adds components such as drive motors and their control systems, and power batteries....

AI Technical Summary

Problems solved by technology

The problem is that each independent assembly is bulky and heavy

The problem is that each independent assembly is bulky and heavy

The driving device on most electric vehicles uses a combination of a drive motor and a fixed-ratio reducer. Due to the inability to change gears, it is difficult to take into account the requirements of vehicle climbing and acceleration and the maximum speed of the vehicle, resulting in some electric vehicles. The maximum speed is significantly different from that of traditional cars

[0004] Patent CN104295675A discloses a two-speed electric vehicle transmission assembly, which cooperates with the drive motor and can adapt to different working conditions of the vehicle, but the integration of the two-speed transmission and the drive motor has not been realized, and the size of the assembly is too large, which affects the layout of the vehicle space

Patent CN203859630U discloses an integrated two-speed motor transmission for pure electric vehicles, which adopts a planetary gear structure and shifts gears through a clutch. The existing problem is that the assembly structure is relatively complicated

At the 22nd Aachen Automobile and Engine Technology Symposium, the article The InnovativeBMWPowertrainintheAllNewBMWi8 mentioned a two-speed transmission used in conjunction with the drive motor, which can meet the needs of different working conditions of the vehicle, but has not realized the integration with the drive motor

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