Motor shell structure

Abstract

The invention discloses a motor shell structure. The motor shell structure comprises an outer shell, an inner shell and a plurality of middle piece assembled between the outer shell and the inner shell, each of the middle pieces is of an arc-shaped structure or an annular structure with the hollow interior, a plurality of protrusions and / or grooves are formed in the upper surfaces and the lower surfaces of the middle pieces, the protrusions and / or the grooves in the upper surface are matched and fixed with the grooves and / or the protrusions in the inner circular face of the outer shell, and the protrusions and / or the grooves in the lower surface are matched and fixed with the grooves and / or the protrusions in the outer circular face of the inner shell. The invention discloses the motor shell structure, through the design of the outer shell, the inner shell and the plurality of middle pieces assembled between the outer shell and the inner shell, the excitation of vibration generated bya stator to the motor shell can be weakened, the damping coefficient of the motor shell is increased, the outer shell, the inner shell and the middle pieces can be machined and formed independently, and the motor shell structure has the advantages of being simple in machining process, short in machining period, low in manufacturing cost and capable of being produced in batches.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a motor housing structure. Background technique [0002] With the development of automobile manufacturing industry, automobile NVH performance has become a comprehensive technical index of modern automobile manufacturing quality. NVH is the English abbreviation of noise, vibration and harshness (Noise, Vibration, Harshness). NVH gives car users the most direct and superficial feeling. The NVH problem of vehicles is one of the concerns of major vehicle manufacturers and parts companies in the international auto industry. According to statistics, about 1 / 3 of the failure problems of the whole vehicle are related to the NVH problem of the vehicle. The main excitation sources that affect the noise level in the car are engine, motor, reducer, tire and other components. For electric vehicles, the main source of excitation comes from the electric motor. There are many mo...

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Problems solved by technology

[0003] Due to the integrated design of the damping structure and the motor housing of the existing built-in damping motor, this kind of motor housing has the problems of difficult processing, long processing cycle, high manufacturing cost and inability to mass produce

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