Electric vehicle and dual-motor planet gear power transmission system thereof

Abstract

The invention belongs to the field of automobiles, particularly provides an electric vehicle and a dual-motor planet gear power transmission system thereof and is intended to solve at least one of theproblems of the prior art that wheels of an electric vehicle driven by a single motor cannot output high torque through a reducer and wheels of the electric vehicle driven by the single motor are unsuitable for independent adjustment of driving torque. The dual-motor planet gear power transmission system mainly comprises two power transmission subsystems which are identical; each power transmission subsystem includes a motor and a reducer arranged on an auxiliary frame, and the motor is connected with an axle shaft of the electric vehicle through the reducer such that wheels can be driven torotate. Each reducer mainly includes a single-stage cylindrical gear reduction mechanism and a planet gear reduction mechanism which are in driving connection, the two mechanisms enable the reducer togain a high reduction ratio at the premise of compact layout space, and therefore, the electric vehicle can gain 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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