Wheel driving device

Abstract

The invention discloses a wheel driving device. The wheel driving device comprises a driving motor and a driving shaft. The driving shaft is connected with a motor output shaft of the driving motor by a planetary gear mechanism, the driving motor is connected onto a power source of an automobile by a motor controller, the planetary gear mechanism comprises a sun gear and a planetary carrier, the sun gear is fixedly sleeved on the driving shaft, the planetary carrier is fixedly sleeved on the motor output shaft, an inner gear ring is sleeved on an outer circle of the sun gear, a plurality of planetary gears are in mesh connection between the sun gear and the inner gear ring and are rotationally connected onto the planetary carrier, and a motor brake is arranged on the planetary carrier and is electrically connected onto the motor controller. The wheel driving device has the advantages that the motor can be disconnected from a transmission system according to requirements of working conditions, accordingly, the service life of the motor can be prolonged, and technical problems that an existing motor of a vehicle in the prior art can be reversely dragged at a speed higher than the maximum rotation speed of the existing motor when the vehicle runs at the highest speed, a motor controller can be damaged due to counter electromotive force of the existing motor and the service life of the existing motor is shortened can be solved.

Description

technical field [0001] The invention relates to a wheel-side driving device, in particular to a wheel-side driving device which can cut off the connection between a motor and a transmission system according to working conditions, thereby improving the service life of the motor. Background technique [0002] In the existing wheel-drive vehicles, when the whole vehicle goes downhill continuously or reaches the maximum speed, the motor will be dragged backwards. At this time, the motor speed exceeds its own maximum speed. If the motor is not disconnected from the entire transmission system, the motor will Running in an overspeed state will directly affect the life of the motor end bearing, and in an overspeed state, the motor will generate high counter electromotive force, which will damage the motor controller. [0003] A Chinese patent discloses a wheel drive device (CN201120847Y). The device is composed of a bevel gear transmission part and a planetary gear train transmissio...

AI Technical Summary

Problems solved by technology

Although this device solves the problem that traditional transport vehicles are not suitable for material transportation in narrow spaces and low roadways, it has the advantages of eliminating the need for cars, lowering the center of gravity, making the frame into an integral compartment, and improving the loading capacity. , but this device also has the problem that the motor will be dragged backwards when the vehicle goes downhill continuously or reaches the maximum speed, which will easily cause the motor speed to exceed its own maximum speed, which will not only affect the life of the motor end bearing, but also damage the motor due to the back electromotive force of the motor controller, reducing the service life of the motor

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