Symmetrical Arrangement of Disk Motor Differential Gear Train Composite Driven Automotive Hub Motor

Abstract

The present invention relates to a driving transmission system of an electric vehicle, in particular to an automotive wheel hub motor driven by a new type of disc motor differential wheel system symmetrically arranged, including a central shaft, a first disc motor, a second disc motor and a planetary differential Wheel train; one end of the central shaft is rotatably supported by a wheel hub through the first bearing, the other end of the central shaft is fixedly connected to the steering knuckle, tires are fixedly installed on the wheel hub, and brakes are fixedly installed on the steering knuckle; the first disc motor is set On the central shaft near the hub, the second disc motor is arranged on the central shaft near the steering knuckle; the planetary differential gear train is arranged on the central shaft, between the hub and the first disc motor. The invention can provide high torque when the drive system starts at low speed, and can also realize high-efficiency operation in a wide speed range, thereby adapting to the changing driving conditions of the vehicle, effectively improving the driving efficiency of the system, and extending the mileage.

Description

technical field [0001] The invention relates to a drive transmission system of an electric vehicle, in particular to an automobile wheel hub motor with a symmetrically arranged disc motor differential wheel train compound drive. Background technique [0002] With the increasing environmental problems and energy consumption problems, electric vehicle technology is becoming more and more important, and its development is accelerating. Among them, the technical advantages of electric vehicles driven by in-wheel motors in terms of vehicle general layout structure, active chassis control and convenient handling have attracted widespread attention from industry and academia. Many famous automobile companies and research institutions have successively launched in-wheel motors. Drive concept car. [0003] Drive motor technology is one of the most important core technologies of electric vehicles, and hub motors are one of the most important ones. Hub motor technology is a technolog...

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Problems solved by technology

At the same time, in order to improve the cruising range of the vehicle, this requires the motor to operate at high efficiency in a wide speed range, and it is difficult for a single motor to meet these requirements at the same time;

[0007] (2) Due to the limitation of the space size of the hub and the power and torque requirements of the hub motor for electric vehicles, it is difficult to design and manufacture a hub motor, and it is not suitable to adopt a new driving method of decentralized multi-power according to different road conditions;

[0008] (3) The hub motor is integrated in the hub, which will increase the unsprung mass, which will affect the driving comfort. This requires the hub motor to have high power and torque density to reduce the mass. However, the radial magnetic field motor commonly used at present has axial Disadvantages such as large size, heavy weight, poor low-speed performance, and difficulty in improving the utilization of wheel space

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