Two-speed transmission of pure electric vehicle

Abstract

The invention provides a two-speed transmission of a pure electric vehicle, which is relatively simple in structure and less in control difficulty and relatively low in cost. A sun gear (3) of a planetary row is located within a planetary carrier (5); a planetary wheel (4) is rotationally mounted on the planetary carrier (5); a gear ring (6) is mounted outside the planetary carrier (5); the right end of the motor shaft (2) of a driving motor (1) is fixedly connected to the planetary carrier (5) of the planetary row; the right end of the sun gear (3) of a planetary row is fixedly connected with the left end of a main shaft (7) of a reducer (11); and a gear ring (6) thereof is fixedly connected with the right end of an outer ring (8). The two-speed transmission has the characteristics that a clutch (10) is a high-speed-disengage centrifugal clutch, and is connected to the lower end of the outer ring (8) and the planetary carrier (5) of the planetary row, and the middle of the outer ring (8) is connected with a brake (9).

Description

technical field [0001] The invention relates to a pure electric vehicle, in particular to a two-speed transmission for a pure electric vehicle. Background technique [0002] Pure electric vehicles are a kind of clean energy vehicles. With the vigorous promotion of energy saving and emission reduction, pure electric vehicles have become a major development trend. Although the traditional pure electric transmission can satisfy functions such as speed regulation and driving. However, since the reducer of the traditional pure electric transmission has a fixed speed ratio, the transmission efficiency of the whole vehicle is low. And increasing the gear position to two gears can solve the problem of low transmission efficiency of the above-mentioned vehicle. [0003] At present, a common two-speed transmission for pure electric vehicles includes a drive motor and a planetary row. In order to achieve gear shifting, a non-centrifugal clutch and a brake are used. The problem is tha...

AI Technical Summary

Problems solved by technology

However, due to the fixed speed ratio of the reducer of the traditional pure electric transmission, the transmission efficiency of the whole vehicle is low

And increasing the gear to two gears can solve the problem of low transmission efficiency of the above-mentioned vehicle

[0003] At present, a common two-speed transmission for pure electric vehicles includes a drive motor and a planetary row. In order to achieve gear shifting, a non-centrifugal clutch and a brake are used. The problem is that the non-centrifugal clutch and brake are separately The control requires two sets of actuators and control systems, the structure is relatively complex, the cost is high, and the two sets of control systems are controlled at the same time during the shifting process, which is difficult to control

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