Brushless motor for electric axle

Abstract

The invention discloses a brushless motor for an electric axle. The brushless motor comprises an axle, a protective casing, a built-in fixed casing, a top cover and a brushless motor. A built-in fixedcasing is fixedly welded on the upper surface of the axle. The brushless motor is arranged inside the built-in fixed casing. The brushless motor in the device is fixed inside the built-in fixed casing. The brushless motor contacts a heat sink strip inside the built-in fixed casing. The brushless motor is stably fixed inside the built-in fixed casing, has a stable structure, and is not easy to shake. The heat sink strip has a certain heat dissipation effect. Heat dissipation holes in the built-in fixed casing enhance the heat dissipation of the brushless motor. A shock-absorbing spring in a buffer hole in the heat sink strip movably fits the outer wall of the brushless motor, which has a certain cushioning effect and enhances the stability of the brushless motor. A protective plate is arranged on the upper end of the brushless motor. The protective plate is fixed on the inner wall above the top cover through a protective casing stabilizing spring, which reduces the wear of the upper end face of the brushless motor and increases the service life of the brush motor.

Description

technical field [0001] The invention relates to the technical field of brushless motors for electric vehicle axles, in particular to a brushless motor for electric vehicle axles. Background technique [0002] The brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. Since the brushless DC motor operates in a self-controlled manner, it does not add an additional starting winding to the rotor like a synchronous motor with heavy load under variable frequency speed regulation, nor does it cause oscillation and out of step when the load changes suddenly. The permanent magnets of brushless DC motors with small and medium capacity are now mostly made of rare earth NdFeB materials with high magnetic energy levels. Therefore, the volume of the rare earth permanent magnet brushless motor is reduced by one frame size compared with the three-phase asynchronous motor with the same capacity, but the existing brushless motors for electric axles st...

AI Technical Summary

Problems solved by technology

[0003] 1. The existing brushless motors for electric axles still have certain disadvantages in their convenient shock absorption performance. After the brushless motors vibrate for a long time, the installation structure of the brushless motors is easy to loosen;

[0004] 2. When the brushless motor vibrates and loosens, it is easy to aggravate the wear and tear, resulting in a reduction in the service life of the brushless motor;

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