Patent attributes
Disclosed is a fastening structure of a ring gear, wherein a ring gear is fastened to a flange of a differential case constituting a differential subassembly. The ring gear has an inner peripheral surface to be press-fitted to the outer peripheral surface of the flange, and is swaged by a swaging portion provided on at least one end of the flange in the axial direction. In order to prevent the ring gear from deforming in the radial direction, an engaging means for engaging the flange with the ring gear using the relationship between a recess and a protrusion is provided. The engaging means is comprised of a recess formed at an end face of the ring gear and a protrusion formed on the flange. The protrusion is engaged in the recess by swaging.
