Electric wheel assembly integrating hub motor

Abstract

The invention discloses an electric wheel assembly integrating a hub motor. The electric wheel assembly comprises a hub, a hub shaft, an inner rotor motor, a planet gear reducer, a steering knuckle assembly and a braking system. The hub shaft is connected to the hub, the inner rotor motor is arranged in the hub and comprises a rotor sleeve, the hub shaft is sleeved with the rotor sleeve, the inputend of the planet gear reducer is connected with the rotor sleeve, and the output end of the planet gear reducer is connected with the hub. The steering knuckle assembly comprises a steering knucklesleeve, the hub shaft is sleeved with the steering knuckle sleeve, the rotor sleeve is sleeved with the braking system, and the electric wheel assembly brakes by the braking system through the rotor sleeve. A motor bearing is arranged between the rotor sleeve and a motor shell, and a hub bearing is arranged between the steering knuckle sleeve and the hub shaft. By the adoption of the electric wheel assembly integrating the hub motor, force is borne more reasonably, the reliability and safety of the electric wheel assembly are improved, the axial dimension of the electric wheel assembly is reduced, and the mass of the electric wheel assembly is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to an electric wheel assembly integrating a hub motor and a reducer. Background technique [0002] Traditionally mechanically driven heavy-duty vehicles, no matter if they adopt a single-axle, double-axle or multi-axle drive configuration, generally adopt a centralized drive method, which often faces some restrictions: components such as drive shafts, transfer cases and differentials occupy Most of the space in the longitudinal beam of the vehicle affects the overall layout and light weight; the overall efficiency of the multi-link transmission chain is low, which limits the number of drive axles, thereby limiting the development of the vehicle in the direction of ultra-long and ultra-heavy load; a single engine provides power , The power transmission is a series transmission method, which has poor reliability and fault tolerance; the specific power is low, the power is ...

AI Technical Summary

Problems solved by technology

The multi-stage reduction scheme will take up too much space in the wheel and reduce the transmission efficiency, while the single-stage planetary gear reduction scheme is often difficult to achieve the required large reduction ratio

Secondly, the improper arrangement of the electric in-wheel motor and the deceleration mechanism will lead to unreasonable layout of the main bearing of the wheel. The in-wheel motor occupies too much space outside the wheel, and there is no space to arrange the steering kingpin, suspension and braking system. Problems such as unreasonable loading of motor housing and other components

If the layout of the braking system is unreasonable, it will affect the reliability and safety of the electric wheel, and the heat generated by the braking system will affect the performance of the motor

The design of the hub motor drive wheel also faces problems such as difficult cooling of the motor and excessive unsprung mass

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