Low-speed large-torque electric wheel device and electric automobile

Abstract

The invention discloses a low-speed large-torque electric wheel device. The low-speed large-torque electric wheel device comprises a motor shell, a wheel hub, a motor shaft, an inner gear ring, a sunwheel, at least one planetary gear and at least one planetary shaft, wherein the motor shell is of a hollow disc structure, and the centers of the two sides of the motor shell are coaxially provided with concave cavities; the wheel hub is arranged on one side of the motor shell; the motor shaft can rotationally penetrate through the centers of the two sides of the motor shell, and one end of the motor shaft is rotatably arranged in the center of the wheel hub; the inner gear ring is coaxially arranged inside the concave cavities in one side, close to the wheel hub, of the motor shell in an interference mode; the sun wheel is arranged on one side, corresponding to the inner gear ring, of the motor shaft in an interference and sleeving mode; the at least one planetary gear is arranged insidethe inner gear ring in a meshed mode, and the planetary gear is in meshed transmission with the sun gear; and the at least one planetary shaft can rotationally penetrate through the center of the corresponding planetary gear, and one end of the planetary shaft close to the wheel hub is fixedly connected with the wheel hub and is used for driving the wheel hub to rotate. The invention further provides an electric automobile. The low-speed large-torque electric wheel device is adopted, so that the smoothness and the maneuverability of the automobile running are improved.

Description

technical field [0001] The invention relates to the field of electric wheel structure, more specifically, the invention relates to a low-speed high-torque electric wheel device and an electric vehicle. Background technique [0002] As an important solution for new energy vehicles at present, electric vehicles have the advantages of energy saving and environmental protection. At present, electric vehicles mainly have three drive types: centralized drive system, the power output by the drive motor passes through the transmission to the drive shaft, and then is transmitted to the wheels by the differential, and one or several motors control the four wheels at the same time; In the wheel drive system, the driving motor is arranged on the drive axle, and each motor controls a wheel; in the hub drive system, the motor, reducer, and brake are all placed in the hub, and each motor drives a wheel independently to drive the whole vehicle. Among them, the use of the hub drive system, ...

AI Technical Summary

Problems solved by technology

[0005] In the Chinese patent application with the application number 201811066721.7, although the two-stage planetary gear reduction mechanism adopted theoretically solves the problems in principle and technology, it requires two sets of planetary wheel reduction mechanisms, and the structure is complex, resulting in non-spring The drastic increase in the load quality will affect the ride comfort and maneuverability of the car

In addition, the heat dissipation and sealing of the planetary gear reduction mechanism are still insufficient, and it is difficult to achieve lubrication. In the process of high-speed operation, it causes serious mechanical wear and reduces transmission efficiency.

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