| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotational power transmitter for a fastening tool that can reduce the number of revolutions on the output side of rotational power against the number of revolutions on the input side.SOLUTION: A rotational power transmitter 4 for a fastening tool, incorporated in the rotational power transmission path of a nut runner 1, enables a rotational power to be transmitted, until a seating torque value is reached, between a drive shaft 11 and a drive housing 12 under a contact force of a drive pin 19 with a leading edge groove surface 13a of a lead groove 13 by a compression coil spring 24, and when the seating torque value is reached, enables the rotational power to be transmitted between the drive shaft 11 and the drive housing 12 by rotating the drive housing 12 relative to the drive shaft 11 and moving the drive pin 19 along the lead groove 13 to bring the drive pin 19 into contact with the end edge of the lead groove 13. |
