Multi-mode dual-motor two-gear gearbox for electric automobile

Abstract

The invention discloses a multi-mode dual-motor two-gear gearbox for an electric automobile, relates to the technical field of electric automobiles, and aims to solve the technical problem that a common three-in-one electric drive assembly of an existing electric automobile cannot meet the requirements of dynamic property and economical efficiency of the automobile. In a multi-mode dual-motor two-gear gearbox of an electric automobile, a dual-motor structure in which motor rotor shafts are connected in series and integrated is adopted, a main drive motor is connected with a first-gear gear pair, and a second-gear gear pair transmits power to wheels through a differential mechanism. The auxiliary drive motor drives the direct gear pair through the one-way clutch and then transmits power to the wheels through the differential mechanism, the main drive motor and the auxiliary drive motor can independently drive the vehicle and can also transmit power to drive the wheels through power coupling, and the vehicle can have multiple working modes in the running process. Through switching of different working modes, the motor can operate in an efficient area as much as possible, the utilization rate of the motor is improved, power redundancy in matching is avoided, and the two-gear gearbox is free of power interruption during gear shifting.

Description

technical field [0001] The invention relates to the technical field of electric vehicle gearboxes, in particular to a multi-mode dual-motor two-speed gearbox for electric vehicles. Background technique [0002] At present, the power system of electric vehicles often adopts a three-in-one mode in which a motor, a reducer and a controller are integrated. In this way, the single motor and reducer solution cannot take into account the power and economy of the vehicle at the same time, and because the vehicle must be given priority. The dynamic performance of the vehicle to meet the acceleration and climbing performance of the vehicle leads to excessive back power and torque of the motor. However, the vehicle cannot use such a high power in the normal low-speed and high-speed cruising state, so that the motor often runs. In the high-speed and low-torsion area, we know that according to the efficiency map of the motor, the high-efficiency area is often concentrated in the low- and...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-mode dual-motor two-speed gearbox for electric vehicles, which is used to solve the problem that the commonly used three-in-one electric drive assembly of electric vehicles in the prior art cannot take into account the power and economy of the vehicle Asked technical questions

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