Two-speed dual clutch transmission drive unit for pure electric vehicle

Abstract

The invention relates to a two-speed dual clutch transmission drive unit for a pure electric vehicle. The two-speed dual clutch transmission drive unit comprises a motor, a dual clutch, a transmission box, an inner input gear shaft, an outer input gear shaft, an intermediate shaft and an output shaft. A gear on the inner input gear shaft is a first-gear driving gear; a gear on the outer input gear shaft is a second-gear driving gear; the intermediate shaft is provided with a first-gear driven gear, a second-gear driven gear and a main reducing driving gear; and the output shaft is provided with a main reducing driven gear. Power is delivered from the motor to be input to the dual clutch, and is delivered to a first-gear gear set (a second-gear gear set) through the inner input gear shaft (the outer input gear shaft), and then, a first-gear torsion (a second-gear torsion) is transmitted to the output shaft by a main reducing gear on the intermediate shaft to be output. The two-speed dual clutch transmission drive unit for the pure electric vehicle has the characteristics that 1, by adopting an integrated structure of the transmission and a reducer, the transmission and a main reducer of an electric vehicle are fused together, and thus, the power can be directly output to axletrees; a reducing mechanism is not needed, so that a drive system is more compact in structure, the number of parts is reduced, and the cost is reduced; 2, gears are shifted by adopting the dual clutch, and thus, the requirements of the gear shifting dynamic property and the economic efficiency of a traditional electric vehicle are met; the power of the motor is utilized optimally; and the driving distance of the electric vehicle is extended.

Description

technical field [0001] This patent relates to a two-speed dual-clutch transmission transmission device suitable for pure electric vehicles. Background technique [0002] With the deterioration of the earth's environment and the lack of energy, human beings have an urgent need for the research and development of new energy vehicles. As one of the new energy vehicles, electric vehicles have attracted extensive attention from various countries. At present, the transmission system of pure electric vehicles mostly uses a fixed speed ratio reducer as the transmission device. On the one hand, this transmission method makes electric vehicles have higher requirements on the performance of the motor, and on the other hand, it cannot keep the motor in the best working condition. . A large number of studies have shown that the two-speed transmission is a more suitable transmission system for pure electric vehicles. [0003] Electric vehicles have requirements on the transmission devi...

AI Technical Summary

Problems solved by technology

At present, the transmission system of pure electric vehicles mostly uses a fixed speed ratio reducer as the transmission device. On the one hand, this transmission method makes electric vehicles have higher requirements on the performance of the motor, and on the other hand, it cannot keep the motor in the best working condition.

Images