A motor stator stamping

Abstract

The invention provides motor stator punches. The stator punches are stacked together to form a stator core, and each two optional stator punches which are adjacent to each other in the up-down direction serve as mirror images of each other. Screw holes in the stator punches are overlapped to form a screw hole of the stator core. Pin holes of the stator punches are overlapped to form a pin hole of the stator core. When two motor end caps are assembled at two ends of the stator core, four screw holes and four pin holes are respectively formed in four corners of each motor end cap. After being inserted in the pin holes, the positioning pins penetrate in the pin hole of the stator core. After penetrating in the screw hole of one of the motor end cap, a screw which is used for fixing the end caps and the stator core penetrates in the screw hole of the stator core, penetrates in the screw hole of the other motor end cap, and then is screwed with a nut.

Description

technical field [0001] The invention relates to the field of electric vehicle motors, in particular to a stamping sheet of a motor stator. Background technique [0002] Existing industrial fields, including the field of electric vehicles, require a large number of motors. The traditional motor assembly method is mainly installed by means of screws and end caps. The traditional screw motor assembly operation is to pass the screw through the end cover hole, put on the flat washer, spring washer, and nut. The dimensions of these four parts are relatively small, and it is extremely difficult to assemble the motor; and each set of screws, flat washer , Spring washers, and nuts need to be tightened with an electric wrench, because it needs to be tightened manually by groups, and the force is inconsistent, so the installation accuracy cannot be guaranteed after tightening, so the coaxiality of the motor is not good, and the noise is loud during use. Not only pollute the environmen...

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to solve the problem that when the design of motors (especially two-pole asynchronous motors) tends to be high-power-small-volume development, the radial size of the motor is reduced, the length of the iron core is increased, the shaft of the motor is becoming more and more slender, and the critical speed of the shaft often becomes The working speed of the motor, due to the traditional stator structure and assembly, the unilateral magnetic pull of the motor increases, which will cause the shaft deflection to increase with the increase in the stiffness of the magnetic pull, the motor shaft is bent and deformed, and the acceleration bearing is damaged, causing Vibration and noise will lead to increased loss and reduced efficiency. In severe cases, the stator and rotor will even rub against each other, and the motor cannot rotate until the motor is burned. At the same time, it will cause problems such as increased vibration and noise.

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