Dual-motor variable-speed electric drive axle system

Abstract

The invention provides a dual-motor variable-speed electric drive axle system. The dual-motor variable-speed electric drive axle system comprises a first motor (EM1), a second motor (EM2), a first hollow shaft (3-I), a second hollow shaft (3-II), a differential mechanism (D), an intermediate shaft (4), a first clutch (A), a second clutch (B), a lock-up clutch (C) and a gear shifting mechanism (6). A double-motor speed control system is adopted, in the mode switching process, one motor is always kept in power connection, and therefore it can be guaranteed that power is not interrupted in the gear shifting process; three working modes are realized by using two pairs of gear sets, the structure is simple, and the space is saved; the design of two hollow shafts is adopted, the two hollow shafts are connected with the two motors respectively, and large-speed-ratio speed regulation is achieved while the compact structure is achieved; and the first clutch and the second clutch are bidirectionally connected left and right and are coaxially distributed with the lock-up clutch, the same gear shifting mechanism is adopted for control, the structure is compact, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a dual-motor variable-speed electric drive axle system. Background technique [0002] With the continuous development of new energy vehicle technology, the drive system is required to be integrated and integrated. For commercial vehicles, the traditional central drive form, the power system and the rear axle are separated, and the degree of integration is not high. It affects the efficiency of the whole vehicle, especially for vehicles with limited space such as professional vehicles, and also affects the spatial layout of other components. Therefore, the electric drive axle system of commercial vehicles has advantages in both efficiency and space layout. However, there are not many types of commercial vehicle electric drive axle systems on the market, and most of them are driven by a single motor, which has defects such as power interruption and application limitatio...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of new energy vehicle technology, the drive system is required to be integrated and integrated. For commercial vehicles, the traditional central drive form, the power system and the rear axle are separated, and the degree of integration is not high. It affects the efficiency of the whole vehicle, especially for vehicles with limited space such as professional vehicles, and also affects the spatial layout of other components. Therefore, the electric drive axle system of commercial vehicles has advantages in both efficiency and space layout. However, there are not many types of electric drive axle systems for commercial vehicles on the market, and most of them are driven by a single motor, which has defects such as power interruption and application limitations.

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