Patent ID: 6018209
Filing Date: 2000-01-25
Classification: H02K

Abstract:
A rotary electric machine comprising:a shaft;an armature core connected to said shaft, a plurality of slots being defined on an outer periphery of said armature core;a plurality of pairs of upper coil sections and lower coil sections, each said pair being disposed in a corresponding one of said slots;a plurality of lower coil-end sections, each having one end connected to an end of a corresponding end of said lower coil section and extending toward said shaft;a plurality of upper coil-end sections, each being connected between an end of one of said upper coil sections and another end of a corresponding one of said lower coil-end sections and extending toward said shaft to form a smooth contact surface;a brush member disposed in contact with contact surfaces composed of said upper coil-end sections; andstructure disposed on said shaft axially outside of said upper coil end sections, said structure resiliently retaining said upper coil end section from outside, thereby allowing thermal expansion of said upper and lower coil sections while maintaining said smooth contact surface;wherein said structure comprises a fixing cap made of a resilient steel and externally biasing said upper coil-end sections against said armature core, andwherein said fixing cap includes an inner ring fitted on said shaft, an outer ring pressing said upper coil-end sections toward said armature core, and a retaining ring connecting said inner ring and said outer ring.