| 摘要 |
According to the present invention, a stopper ring for a power screwdriver is installed by inserting a stopper washer (13) between a bearing (17) to an outer side of a fastening member (11). The fastening member (11) installs a spring ring (16) in an inner wall. A plurality of rolling balls (12) are installed on a side of the spring ring (16) to be supported on the center, thereby forming a through portion (11a) wherein a driver shaft (21) is inserted. On a side of the fastening member (11), an adhesion piece (14) is installed to be upright in a line with a rotational axis; thus, a stopper ring (A) is fixedly installed on an outer surface of the driver shaft (21) by a fixing screw (15). |
