Transmission and variable radially expanding spring clutch assembly

摘要

A transmission comprising: an output shaft (102) driven by a motor (22) that is selectively energized by a trigger assembly (18) that extends from a housing (14) containing said motor (22); a radially expanding spring clutch assembly (50) including a shaft member (52) connected to said output shaft (102), said shaft member (52) directs torque to a gear member (54) in a drive condition and when a value of torque surpasses a threshold value said shaft member (52) directs a reduced torque to said gear member (54) in a clutch out condition; and a spindle shaft (28) having a high speed gear (130) and a low speed gear (134) that move together longitudinally along said spindle shaft (28) between a high speed condition and a low speed condition, wherein said clutch shaft (52) is generally parallel to said spindle shaft (28), wherein said high speed condition at least defines said high speed gear (130) engaged to said spindle shaft (28) and driven by a gear (120) on said shaft member (52), said low speed gear (134) engaged with said gear member (54) but said low speed gear (134) is free to rotate around said spindle shaft (28) and wherein said low speed condition at least defines said high speed gear (130) engaged with said gear (120) on said clutch shaft (52) but free to rotate around said spindle shaft (28), said low speed gear (134) driven by said gear member (54) and engaged to said spindle shaft (28).