Motor

Abstract

A motor in an example of the invention forms a stator core stack by laminating a plurality of straight cores having a core back, a tooth, and a linking part for linking the core backs. In the stator core stack, the linking portion is folded and deformed the linking portion so as to join an end surfaces of the straight core, and a core back outer peripheral portion is formed at the back side of the core back, and the diameter of the core back outer peripheral portion is formed same as or shorter than the diameter of the inner peripheral surface of the housing, and is disposed in the housing. A bar-like member is press-fitted in the axial direction between both the end surfaces of the straight core. In other example of motor, an engaging portion extending in the axial direction and projecting in the radial inward direction is formed in the inner peripheral surface of the housing, and the end surfaces of the straight core are engaged or fitted with the engaging portion.

Description

technical field [0001] The present invention relates to electric motors, in particular to inner rotor type electric motors. Background technique [0002] Conventionally, there is known an inner rotor type motor in which magnets are disposed on the inner peripheral side of a stator. In this inner rotor type motor, such as Figure 14 As shown in the plan view of , a straight core C is formed in which a plurality of core pieces C1 are connected by thin-walled connection portions. The straight core C is a stamped flat plate made of a magnetic material such as a silicon steel plate, and a stator core body U is formed by laminating a plurality of them as shown in the perspective view of FIG. 15 . Each core piece C1 has a core back Y and teeth (tooth) T. Resin insulators not shown in the figure are attached to the stator core body U from both sides in the direction in which the straight cores C are stacked (up and down in FIG. 15 ), and then wound around the teeth T. Figure 16 ...

AI Technical Summary

Problems solved by technology

In addition, if the stator S is pressed into the case H in such a state where scratches have occurred, the teeth T adjacent to the stator S in the circumferential direction and the circumferential slots of the teeth T are not uniform, and due to the applied current On the other hand, the magnetic field generated in the stator S is not uniform in the circumferential direction, and the characteristics of the stator S deteriorate.

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