Electric wheel assembly adopting drum brake

Abstract

The invention discloses an electric wheel assembly adopting a drum brake, which comprises a tire, a wheel rim, a wheel hub, a steering knuckle assembly, a drum brake, an inner rotor hub motor and a planetary gear reducer. The input of the planetary gear speed reducer is a sun gear, and the output of the planetary gear speed reducer is a planetary carrier; the planetary carrier is integrally integrated on the wheel hub and is connected with the wheel rim, and the tower gear adopted by the planetary gear of the planetary gear speed reducer achieves larger transmission ratio under the condition of smaller axial length. The inner rotor hub motor is arranged between the planetary gear reducer and the drum brake, power is transmitted to the sun gear through a hollow rotor sleeve, the other end of the rotor sleeve is connected with a brake drum of the drum brake, braking force of the brake is amplified through the planetary gear reducer, braking force required to be provided by a braking system can be reduced, and the motor can provide electric braking force during braking. The steering knuckle assembly and the wheel hub penetrate through the centers of the inner rotor hub motor and the drum brake, and a wheel hub bearing is arranged between the steering knuckle sleeve and the wheel hub.

Description

technical field [0001] The invention belongs to the technical field of electric drive of new energy vehicles, and in particular relates to an electric wheel assembly using a drum brake. Background technique [0002] Distributed drive technology has the advantages of short transmission chain, high transmission efficiency, high integration, and is conducive to the overall layout of the vehicle. The torque of each wheel motor can be independently controlled and measured, and it is easy to realize various vehicle dynamics controls. Therefore, the hub motor is used to drive The electric wheel system has become a research and development hotspot of various scientific research institutions and companies. [0003] In the existing electric wheel technology, the scheme of disc brake is mostly adopted. The space arrangement of the electric wheel is compact. In order to make full use of the radial space of the electric wheel, other components are often arranged in the center of the bra...

AI Technical Summary

Problems solved by technology

This scheme is not conducive to dissipating a large amount of heat generated in the process of friction braking, which will cause a serious temperature rise of the motor, which may cause problems such as permanent magnet demagnetization and affect the performance of the motor. The layout of the drum brake is not ideal enough, and the problem of heat dissipation still more prominent

[0006] In addition, in the existing electric wheel schemes, many configurations of electric wheels, such as the schemes of patent "CN104590001A" and patent "CN201810454446.X", use the motor housing to transmit the force from the rim to the suspension, that is, the motor The shell must bear the load of the wheel. In this configuration, the load of the motor shell is relatively complex, and it is difficult to reduce the weight. The load and vibration of the electric wheel directly affect the motor system, and the layout is not ideal.

Images