Fixing structure for a commutator, insulator for a motor core, and motor structure

摘要

A motor has an armature that includes a motor core and a commutator. An insulator for insulating the motor core is composed of winding insulating portions and a shaft insulating portion integral with the winding insulating portions. A connecting portion is formed at the end of the shaft insulating portion. The connecting portion is inserted into an insertion groove of the commutator for integral connection. Specifically, the insulator is fixed to the armature shaft by the application of windings, and the commutator is connected and fixed to the insulator. Accordingly, a larger fixing force can be obtained compared to conventional structures, and the use of an adhesive and highly accurate machining become unnecessary, thereby decreasing costs.