Planetary plate gear shifting type automatic four-speed pure electric power assembly

Abstract

The invention discloses a planetary plate gear shifting type automatic four-speed pure electric power assembly which comprises a motor, a front double-speed planetary transmission device, a rear double-speed planetary transmission device, a differential mechanism, a first gear shifter, a second gear shifter, a third gear shifter and a fourth gear shifter. The motor and the front double-speed planetary transmission device are coaxially mounted; the rear double-speed planetary transmission device and the differential mechanism are coaxially mounted; a differential mechanism transmission shaft and an output shaft of the motor are installed in parallel. The first gear shifter and the second gear shifter are connected with the front double-speed planetary transmission device in a matched mode,and the third gear shifter and the fourth gear shifter are connected with the rear double-speed planetary transmission device in a matched mode. Through the actions of the four gear shifters, the assembly realizes four-gear mode, electronic parking and neutral gear mode output. Unpowered intermittent gear shifting, random gear shifting, small neutral gear loss, quick gear shifting response, largespeed ratio difference between gears, small gear shifting energy consumption and low cost are achieved, and higher cost performance is achieved.

Description

technical field [0001] The invention relates to the field of pure electric assembly, in particular to an astrolabe shifting automatic four-speed pure electric power assembly. Background technique [0002] With the continuous improvement of pure electric passenger vehicles' demand for high power performance, high power saving and low cost of pure electric powertrain, most of the current market adopts single-motor direct drive mode and multi-speed with single motor and small speed ratio difference The drive scheme of the transmission device, among which the multi-speed automatic transmission device mainly adopts the AMT scheme and the AT scheme. The former mainly uses the electronic execution of the shift fork to select and shift the gear, and the latter mainly uses the wet friction disc to perform the gear shift hydraulically. For multi-speed AMT gearboxes, there are power interruptions, large loss in neutral gear, weak electric braking energy recovery, difficulty in fast arb...

AI Technical Summary

Problems solved by technology

For multi-speed AMT gearboxes, there are power interruptions, large loss in neutral gear, weak electric braking energy recovery, difficulty in fast arbitrary gear switching, small speed ratio difference between gears, long shifting time, and high energy consumption for shifting; for Although the multi-speed wet friction pair AT gearbox solves the problems of power interruption and arbitrary gear switching, there are problems such as great idling loss after the clutch is disconnected, high cost, and high energy consumption for gear shifting.

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