Permanent magnet motor protection structure

Abstract

The invention discloses a permanent magnet motor protection structure. The protection structure comprises a motor shell, wherein a shaft extension end of the motor shell is fixedly connected with a front end cover, a through hole is formed in the center of the front end cover, the through hole is matched with an output shaft, a top end of the output shaft is fixedly connected with a coupler, the side, close to the front end cover, between the front end cover and the coupler is sleeved with an oil seal cover, the side, close to the oil seal cover, between the oil seal cover and the coupler is provided with a dustproof water throwing ring, and a non-shaft-extension end of the motor shell is provided with a rear end cover. The diameter of a non-mounting end of the dustproof water throwing ring is slightly larger than that of a non-mounting end of the oil seal cover, rainwater on a surface of the oil seal cover can be smoothly thrown out through the dustproof water throwing ring, and siltcan be effectively prevented from entering an inner surface of the oil seal cover, a ventilation valve is arranged, the ventilation valve can effectively prevent external water and water vapor from entering the motor cavity, meanwhile, the water vapor in the motor cavity can be discharged, and that no water vapor condensation exists in the motor is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet motors for new energy vehicles, and specifically relates to a protective structure for permanent magnet motors. Background technique [0002] The permanent magnet motor provides excitation with permanent magnets, which makes the motor structure relatively simple, reduces the cost of processing and assembly, and saves the collector ring and brush that are prone to problems, without wireless interference, and improves the reliability of the motor operation; The magneto does not require excitation current and has no excitation loss, which improves the efficiency and power density of the motor; the permanent magnet motor adopts a simplified rotor structure, and its internal structure is compact, making it small in size and light in weight. Benefiting from the above advantages, permanent magnet motors are widely used in the computer industry, automobile industry, and industrial and agricultura...

AI Technical Summary

Problems solved by technology

At present, most permanent magnet motors of new energy vehicles have a closed protective structure. Generally, a closed cavity is formed by the motor casing, front end cover, rear end cover, waterproof joint, oil seal, etc. to ensure the protection level of the motor, but In fact, this common protective structure often causes water to enter the motor during operation, and it is difficult to ensure that the motor does not enter water and sand for a long time, so the design of the protective structure needs to be improved and upgraded

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