MULTISPEED POWER TOOL

摘要

A tool with a transmission assembly having a reduction gearset and a speed selector. The speed selector has a member, an actuator and a shifter assembly. The member is movable between a first position, in which the member is non-rotatable, and a second position in which the member is coupled to a planet carrier of the reduction gearset for common rotation. The actuator includes a pivoting yoke and a follower that is coupled to the yoke. The follower engages the member so as to be axially movable with the follower. The shifter assembly has a selector switch, a switch fork, and a pair of springs. The selector switch is slidable between a first switch position and a second switch position. The shift fork is slidably coupled to the selector switch and receives the yoke. The springs cooperate to bias the shift fork relative to the selector switch into a neutral position.

主权项

1. A tool comprising:
a housing assembly defining a handle; a motor housed in the housing; a transmission assembly received in the housing assembly, the transmission assembly having a reduction gearset; the transmission assembly further including a locking member including a plurality of locking projections, the locking member including a circular hole; wherein the reduction gearset has a first ring gear and is selectively operable in a first overall gear ratio and a second overall gear ratio; wherein the transmission assembly further includes a movable member, the movable member including locking teeth; and wherein the movable member in the transmission assembly non-rotatably engages the locking member when the transmission assembly is operated in the first overall gear ratio through engagement of the movable member locking teeth with the locking projections and wherein the movable member locking teeth and the locking projections are disengaged when the transmission assembly is operated in the second overall gear ratio so as to allow rotation of the movable member relative to the locking member; and wherein the locking member is held in a gear case in a circumferentially extending groove in a manner that restricts relative rotation and axial movement of the locking member with respect to the gear case.