Electric drive device with double motors and single planetary gear train

Abstract

The invention relates to an electric drive device with double motors and single planetary gear train. The electric drive device comprises a first drive motor (16), a planetary gear train (100), a second drive motor (13) and a wet clutch (104), wherein the planetary gear train (100 ) comprises a sun gear (101), a gear ring (102), a planet carrier (103) and a planetary gear train housing, the firstdrive motor (16) is connected with the sun gear (101), the gear ring (102) is fixedly connected with the planetary gear train housing, the second drive motor (13) is connected with the planet carrier(103), one end of the wet clutch (104) is connected with the sun gear (101), and the other end of the wet clutch (104) is connected with the planet carrier (103). Compared with the prior art, the electric drive device has the advantages that the electric drive device can realize two speed transmission without power interruption, achieve the purpose of decelerating and increasing the torque of thefirst driving motor and satisfy the power requirements of a vehicle, meanwhile complete the shifting process through the wet clutch, and achieve smooth shifting process, short shifting time and good driving comfort.

Description

technical field [0001] The invention relates to a driving device for a pure electric vehicle, in particular to an electric driving device with double motors and a single planetary gear train. Background technique [0002] In order to alleviate the growing global energy crisis, reduce greenhouse gas emissions, and maintain the sustainable development of human society, the development of electric vehicles has become the focus of the automotive industry, and has attracted more and more attention and attention from the government and the people. Pure electric vehicles are energy-saving and environmentally friendly new energy vehicles that replace traditional vehicle engines with electric motors. Because the electric motor has the characteristics of on-load start, wide operating speed range and stepless speed regulation, pure electric vehicles can be driven independently by the motor without a transmission However, this technical solution needs to be equipped with an electric mot...

AI Technical Summary

Problems solved by technology

[0004] The Chinese invention patent with the patent number ZL201510309021.6 discloses a planetary gear dual-motor drive device, including a planetary gear reducer, a first motor, and a second motor. The planetary carrier, the sun gear, and the first motor shaft are set in a hollow structure. , the first motor shaft is connected to the sun gear, the second motor shaft passes through the hollow structure of the first motor shaft, the sun gear, and the planet carrier and is connected to the planet carrier, the first motor is a deceleration output, and the second motor is a direct output, that is Equivalently has two gears, and at the same time does not require a mechanical shift mechanism, only needs to switch the motor drive according to the working conditions, which solves the problems of insufficient power performance and complicated shift control in the prior art, and is mainly used in the field of pure electric vehicle drive devices

But this invention can only realize three working modes by controlling the start and stop of the first motor and the second motor, that is, the first motor is driven alone, the second motor is driven alone, and the double motor is coupled. Driven by a speed ratio motor, it is difficult to ensure that the motor works in a high-efficiency area under different working conditions. Therefore, the economical efficiency of this technical solution is poor and needs to be improved urgently

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