| 摘要 |
PROBLEM TO BE SOLVED: To provide a holding structure of angular bearings for a hollow motor, in which angular bearings are accurately operated without difficulty and in which a pressurizing shaft is also smoothly operated. SOLUTION: This is a holding structure of angular bearings in a welding gun, in which, a hollow through-hole 6 is formed in the rotary shaft 5 of a motor 1 and a pressure shaft 13 having a part driven by the motor and pulled inside the hollow through-hole of the motor is provided. The rotary shaft is freely rotatably supported by angular bearings 7a arranged in the front part, and freely movably supported forward and backward by bearings 22. The outer wheel of the angular bearings is held in the axial direction of the motor by an angular bearing holding member 16 that is fixed to the front end face of the motor by a screw 18. In this holding structure of the angular bearings for a hollow motor, the angular bearing holding member is provided with a spring function 20 and integrally formed with the bearings of the pressure shaft. COPYRIGHT: (C)2010,JPO&INPIT
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