Three-gear planet speed change mechanism suitable for electric vehicle

Abstract

The invention belongs to the technical field of machine transmission, and particularly relates to a three-gear planet speed change mechanism suitable for an electric vehicle. The speed change mechanism is composed of two planet rows, two gear-shifting brakes and one gear-shifting clutch. The first planet row and the second planet row are both internal and external meshed single planet rows; the first planet row is composed of a first sun gear, a first planet carrier, a first gear ring and four first planet wheels; and the second planet row is composed of a second sun gear, a second planet carrier, a second gear ring and four second planet wheels. The three-gear planet speed change mechanism has the beneficial effects that the transmission scope is large, the gear order ratio is relatively large, and the motor rotating speed requirement under the high-speed working condition is reduced through an overgear while the requirement of the electric vehicle for climbing an abrupt slope is met; and in addition, the transmission scheme is exquisite, the structure is simple, and the compact design is facilitated.

Description

technical field [0001] The invention belongs to the technical field of mechanical transmission, and in particular relates to a three-speed planetary transmission mechanism suitable for electric vehicles. Background technique [0002] Electric vehicles have become one of the main development directions of current vehicles because of their advantages such as energy saving and environmental protection, good power performance, stable starting, infinitely variable speed, and recyclable braking energy. Small cars have low power levels and simple road conditions, and the general power characteristics of electric motors can meet their driving needs, so most small cars have canceled the transmission. However, for large vehicles, such as buses, trucks, armored vehicles, etc., their own mass is relatively large, the driving power required is large, and the driving conditions are complex. The transmission with two to three gears can not only expand the transmission range of the motor, ...

AI Technical Summary

Problems solved by technology

However, for large vehicles, such as buses, trucks, armored vehicles, etc., their own mass is relatively large, the driving power required is large, and the driving conditions are complex. The transmission with two to three gears can not only expand the transmission range of the motor, but also has a simple and compact structure and is easy to arrange

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