Patent ID: 7225705

Claim:
A power transmission device comprising: a drive-side transmission case; a drive shaft being journaled by the drive-side transmission case such that one end of the drive shaft extends beyond the drive-side transmission case; a drive wheel mounted onto the one end of the drive shaft, a driven-side transmission case being mounted onto the drive-side transmission case and including substantially coplanar first and second abutment surfaces, a driven wheel journaled by the driven-side transmission case and arranged so as to be interlockingly coupled with the drive wheel; a cover member being mounted onto the driven-side transmission case and being juxtaposed with at least the first abutment surface thereof, the cover member covering said one end of the drive shaft, the drive wheel and the driven wheel from a location on an outer side of the driven-side transmission case; and a regulating member being positioned to lie on an outer side surface of the drive wheel and being mounted onto the driven-side transmission case so as to juxtapose at least the second abutment surface thereof, the regulating member being configured to restrict at least axial movement of the drive wheel relative to the driven-side transmission case.