Two-stage speed reduction mechanism for speed reducer of pure electric vehicle

Abstract

The invention relates to a two-stage speed reduction mechanism for a speed reducer of a pure electric vehicle. The two-stage speed reduction mechanism for the speed reducer of the pure electric vehicle comprises a differential mechanism as well as an input shaft, a first auxiliary shaft, a second auxiliary shaft and a middle shaft which are mutually parallel, wherein an input drive gear is fixed to the input shaft; a first driven gear and a one-way overrunning clutch are fixedly arranged in the circumferential direction of the first auxiliary shaft; a second auxiliary shaft clutch and a synchronizer are fixedly arranged in the circumferential direction of the second auxiliary shaft; the first driven gear and a gear of the second auxiliary shaft clutch are co-engaged with the input drive gear; a first drive gear is arranged on the first auxiliary shaft in a manner of slide fit; the first drive gear is connected with the first auxiliary shaft through the one-way overrunning clutch; a reverse gear and an output gear are arranged on the second auxiliary shaft in a manner of slide fit separately; the reverse gear and a second gear are located at the two sides of the synchronizer separately; the second gear is engaged with a differential mechanism input gear of the differential mechanism; a first driven gear and a transmission gear are fixedly arranged on the middle shaft; the firstdriven gear is co-engaged with the first drive gear and the reverse gear; and the transmission gear is engaged with the second gear.

Description

technical field [0001] The invention relates to the field of pure electric vehicles, in particular to a two-stage deceleration mechanism of a pure electric vehicle reducer. Background technique [0002] At present, traditional pure electric vehicles all use a single-stage reduction mechanism with a fixed speed ratio, and its performance can basically meet the driving requirements of the vehicle. However, the power performance of a pure electric vehicle using a single-stage reduction mechanism depends entirely on the drive motor, and the performance requirements for the drive motor are relatively high. In actual road conditions, the motor of a pure electric vehicle with a single-stage transmission mechanism cannot always work in the optimal efficiency zone, especially when driving at the highest or lowest speed and low load state, the energy consumption of the driving motor is large and the efficiency is low. Low, reducing the cruising range of pure electric vehicles, the ec...

AI Technical Summary

Problems solved by technology

However, the power performance of a pure electric vehicle using a single-stage reduction mechanism depends entirely on the drive motor, and the performance requirements for the drive motor are relatively high.

In actual road conditions, the motor of a pure electric vehicle with a single-stage transmission mechanism cannot always work in the optimal efficiency zone, especially when driving at the highest or lowest speed and low load state, the energy consumption of the driving motor is large and the efficiency is low. Low, reducing the cruising range of pure electric vehicles, the economy of the car is not high

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