Automatic Transmissions for Electric Vehicles

Abstract

The invention discloses an automatic transmission for an electric vehicle. The automatic transmission comprises a speed change mechanism arranged between an input shaft and an output shaft, wherein aplanetary transmission mechanism and a clutch device are arranged in the speed change mechanism; the planetary transmission mechanism is composed of a first transmission part, a second transmission part and a third transmission part; when the first transmission part is connected with the input shaft, the second transmission part or the third transmission part is connected with the output shaft; and the clutch device is composed of a driving disc, a first clutch unit and a second clutch unit, wherein the first clutch unit is installed on the first transmission part in a matched mode, and the second clutch unit is installed on the second transmission part or the third transmission part in a matched mode. The automatic transmission has the advantages of compact structure, high and low speed two-gear automatic shifting, stable shifting, wide shifting range and no impact. At the same time, the reverse rotation of a driving motor can further enable a motor vehicle to reverse.

Description

technical field [0001] The invention relates to the field of vehicle transmissions, in particular to an automatic transmission for electric vehicles. Background technique [0002] An automatic transmission, generally speaking, is a car transmission that can automatically change the gear ratio while the vehicle is running, without the need for the driver to manually shift gears. It is widely used in the automotive industry. With the rapid development of new energy vehicles, vehicles gradually begin to use electric motors instead of internal combustion engines as power, and motor-powered vehicles often achieve variable speed by changing the speed of the motor itself, which can easily cause the locomotive to fail to provide Higher instantaneous torque. Although there are also some automatic transmissions for electric locomotives on the market now, many still have the disadvantages of large shifting impact and affecting driving comfort. [0003] For this reason, a transmissio...

AI Technical Summary

Problems solved by technology

With the rapid development of new energy vehicles, vehicles gradually begin to use electric motors instead of internal combustion engines as power, and motor-powered vehicles often achieve variable speed by changing the speed of the motor itself, which can easily cause the locomotive to fail to provide high instantaneous torque

Although there are some automatic transmissions for electric vehicles on the market, many still have disadvantages such as large shifting impact and affecting driving comfort.

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