Motor end cover and motor

Abstract

The invention relates to a motor end cover which comprises an end cover body formed by integrally stretching a metal plate, the end cover body comprises a cover plate and an outer cylinder, the cover plate and the outer cylinder form a containing cavity with one open end, the end cover body is provided with a reinforcing structure, and the reinforcing structure comprises a first reinforcing area; a flange formed by extending the opening edge of the accommodating cavity in the radial direction and then folding the opening edge in the axial direction; a second reinforcing area, wherein a convex ring extends from the middle of the cover plate towards the opening direction, the upper end face of the convex ring is flattened by a flattening tool to form a plane, and the inner and outer circumferential surfaces of the convex ring are shaped to be perpendicular to the inner and outer side surfaces of the cover plate; and a third reinforcing area arranged on an annular reinforcing rib on the outer side face, close to the edge, of the cover plate. The stress release of the metal plate can be effectively reduced, and the deformation is reduced; the strength is not reduced, the thickness of the metal plate is reduced, and the cost is reduced; the invention further relates to a motor with the motor end cover, the motor comprises a rotor, a stator and a motor base, and an air gap between the rotor and the stator is smaller than 0.2 mm; and the material cost is reduced, and the production efficiency and the qualified rate can be improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a motor end cover and a motor. Background technique [0002] The motor end cover is a structural part connecting the rotor and the frame. On the one hand, it protects the inside of the motor, and on the other hand, it ensures the relative position of the stator and the rotor through the rolling bearing placed in the end cover. [0003] The main key parts of the end cover: the spigot and the end face matched with the stator core, the shaft hole matched with the rotating shaft and the bearing, the inner circle of the bearing and the end face. The technical index requirements of the end cap: [0004] 1. It is necessary to ensure the dimensional accuracy, smoothness and cylindricity of the bearing chamber of the end cover. The excessive tolerance of shape and position will cause uneven stress on the inner and outer sleeves of the bearing, resulting in failure of the bearing. [00...

AI Technical Summary

Problems solved by technology

[0008] In order to meet the above standards, the end cover of the existing structure cannot meet the accuracy requirements. Therefore, the air gap between the stator and the rotor is designed to be relatively large when designing the motor, which will cause friction and electromagnetic noise in the motor, and the qualified rate will drop.

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