초록 ▼

It is an object of the present invention to provide a motor having a structure so as to prevent the peeling off of adhesive for fixing the bearing. The outer ring of the second ball bearing is fitted into the second ball bearing fitting space of the bearing holder portion of the second end bracket.

It is an object of the present invention to provide a motor having a structure so as to prevent the peeling off of adhesive for fixing the bearing. The outer ring of the second ball bearing is fitted into the second ball bearing fitting space of the bearing holder portion of the second end bracket. The annular leaf spring which gives a pressure in the direction toward the first end bracket to the outer ring of the second ball bearing is disposed in the pressure giving structure receiving space which is formed continuously to the second ball bearing fitting space. The annular leaf spring is shaped such that trough and crest portions appear alternately in the circumferential direction. The screw members are inserted into the screw holes formed in the second end bracket. The tip end portions of the screw members are arranged to abut the trough portions of the annular leaf spring.

대표청구항 ▼

1. A motor comprising:a stator body having a stator core, a rotor having a rotor member disposed inside and opposite to said stator core and a shaft on which said rotor member is fixed, a first and a second end brackets fixed at the end portions in the axial direction of said stator body, said first

1. A motor comprising:a stator body having a stator core, a rotor having a rotor member disposed inside and opposite to said stator core and a shaft on which said rotor member is fixed, a first and a second end brackets fixed at the end portions in the axial direction of said stator body, said first and a second end brackets having a bearing holder portion respectively, a first and a second ball bearings having an inner ring and an outer ring respectively, said inner rings being forcedly set onto the shaft and said outer rings being joined with corresponding said bearing holder portions of said end brackets with adhesive, said bearing holder portion of said first end bracket being so constructed that said first ball bearing is prevented from moving mechanically in said axial direction with respect to said first end bracket, said bearing holder portion of said second end bracket being formed with a bearing fitting space into which said outer ring of said second ball bearing is fitted and a pressure giving structure receiving space which is formed continuously to said bearing fitting space for receiving a pressure giving structure to give pressure in the direction toward said first end bracket to said outer ring of said second ball bearing, said pressure giving structure comprising a spring member, and said second end bracket being provided with a stopper which allows said outer ring of said second ball bearing to move in a spring-compressing direction to compress said spring member before said adhesive cures, but prevents said outer ring of said second ball bearing from moving in the spring-compressing direction to compress said spring member after said adhesive has cured.