Electric vehicle and its dual-motor planetary gear powertrain

Abstract

The invention belongs to the field of automobiles, and specifically provides an electric automobile and a double-motor planetary gear power transmission system thereof. The present invention aims to solve at least one of the problems in the prior art that the wheels of an electric vehicle driven by multiple in-wheel motors cannot output large torque through a reducer and the problem that the wheels of an electric vehicle driven by a single motor cannot individually adjust the driving torque question. The dual-motor planetary gear power transmission system of the present invention mainly includes two identical power transmission subsystems. Each power transmission subsystem further includes a motor and a reducer respectively arranged on the sub-frame, and the motor is connected with the half shaft of the electric vehicle through the reducer so as to be able to drive the wheels to rotate. The reducer mainly includes a drive-connected single-stage cylindrical gear reduction mechanism and a planetary gear reduction mechanism. The two reduction mechanisms can make the reducer have a high reduction ratio while ensuring a compact layout space, so that electric vehicles can Get better low speed performance.

Description

technical field [0001] The invention belongs to the field of automobiles, and specifically provides an electric automobile and a double-motor planetary gear power transmission system thereof. Background technique [0002] At present, there are two main schemes for single-axis drive systems used in electric vehicles: single-motor drive and multi-motor drive. Among them, single-motor drive means that the power output of a single motor is distributed to the left and right half shafts through the differential, and then the left and right half shafts are respectively transmitted to the wheels corresponding to each half shaft, so that the two wheels rotate synchronously. . Since any one of the two wheels cannot rotate independently, the driving torque of each wheel cannot be adjusted individually, thus making it impossible to obtain good operability of the vehicle. [0003] The multi-motor drive scheme is to configure a hub motor for each wheel separately, so that each wheel can...

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Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the wheels of electric vehicles driven by multiple in-wheel motors in the prior art cannot output large torque through the reducer and the wheels of electric vehicles driven by a single motor cannot be independently For at least one of the problems of adjusting drive torque, the present invention provides a dual-motor planetary gear powertrain for an electric vehicle, said powertrain comprising at least one powertrain subsystem; said powertrain subsystem comprising A motor and a reducer, wherein the reducer includes a first reduction mechanism and a second reduction mechanism, the input end of the first reduction mechanism is connected to the output shaft of the motor, and the output end of the first reduction mechanism connected to the input end of the second reduction mechanism, and the output end of the second reduction mechanism is used to connect the half shaft of the electric vehicle

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