Dual-motor coupler for pure electric automobile

Abstract

The invention discloses a dual-motor coupler for a pure electric automobile. The dual-motor coupler for the pure electric automobile comprises a motor A, a motor B, a sun gear, two planet gears, a planet carrier, a hollow gear shaft, a duplex gear ring, three normally engaged gears, a duplex gear and a differential mechanism, and comprises three driving gears, during switching of the three gears,power-failure-free gear shifting can be realized, energy loss is relieved, the utilization rate of energy is increased, and adverse effects of power failure to running are reduced; the three driving gears comprises a driving gear A, a driving gear B and a driving gear C; the driving gear A is a low-speed gear; the driving gear B is a high-speed gear; the driving gear C is a large-torque outputtinggear; and requirements for speed and power under different road conditions can be met, running of the motors in a high-efficiency section can be maintained, and the working efficiency of the motor isimproved. By the dual-motor coupler, the power arrangement mode of a traditional automobile is changed, a traditional power system assembly is integrated on a driving axle, a transmission system is simplified, and the transmission efficiency is improved.

Description

technical field [0001] The invention relates to an electric vehicle coupler, in particular to a dual-motor coupler for a pure electric vehicle. technical background [0002] At present, almost all electric models are equipped with a single-speed transmission, and do not match a variable-speed transmission like a gasoline engine model. In urban road conditions, the electric motor directly drives the single-speed transmission, but in low-speed conditions, the output torque of the electric motor is unstable, and it will be more difficult when encountering road conditions with steep slopes. Therefore, a reasonable transmission ratio like a transmission is required to achieve a reasonable distribution of vehicles under different road conditions. The motor will generate strong electromagnetic interference during frequent and large-scale speed changes, which will have a bad effect on the motor and its controller. At the same time, if the output power of the battery pack changes t...

AI Technical Summary

Problems solved by technology

The motor will generate strong electromagnetic interference during frequent and large-scale speed changes, which will have a bad impact on the motor and its controller

At the same time, if the output power of the battery pack changes too frequently, it is easy to cause uneven power of each battery unit inside the battery pack, thereby reducing the life of the battery pack.

The traditional transmission system uses the transmission shaft device, which occupies the chassis space, and at the same time reduces the transmission efficiency of the power transmission system, which affects fuel economy and power performance

[0003] As disclosed in CN201611044037, a dual-input and output power-free interrupt coupler adopts distributed drive, and the transmission system is complicated. After the motor passes through a series of transmission mechanisms, the output efficiency decreases, and the differential speed of the front and rear wheels cannot

[0004] Application No. 201710342894.6 discloses a single-motor hybrid drive system based on a power coupler, which is used for hybrid electric vehicles and uses three clutches and one brake. The gear shifting process requires the manipulation of clutches and brakes, and the operation is complicated. There is an obvious power interruption during the shifting process, resulting in power loss

[0005] The invention patent with the authorized announcement number CN204526822 U provides a planetary gear power coupler. Although the coupling between the motor and the engine power is realized, the two powers can only work independently and cannot input two kinds of power at the same time. It can only solve the problem of power conversion. Realize the coupling of power

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