| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact motor-driven robot welding gun by shortening the whole length of the gun by fixing a movable side electrode to a motor body and a fixed side electrode to a robot mounting bracket side. SOLUTION: A movable side electrode 19 is fixed to a motor body 9 and a fixed side electrode 8 is fixed to a robot mounting bracket 1 side. A holding shaft 6 fixed to the bracket side is arranged toward the output shaft 10 side of the motor and makes it as a screw shaft. The screw shaft is fixed inside the output shaft of the motor by fixing a nut 11 to the output shaft of the motor or providing the nut in the holding shaft. The rotation-stopping members 13 and 16 for motor body are arranged between the bracket side and the motor body. The motor is reciprocated with respect to the bracket by screwing the nut with the screw shaft, and pressurizing and releasing operations are conducted between the movable side electrode and the fixed side electrode.
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