| 摘要 |
<p>Disclosed is a structure (1) for fastening a ring gear (3) to a differential case (2). The ring gear (3) has a gear-side press-fit face (21) annularly formed thereon, a projected portion (23) located at an inner position relative to the gear-side press-fit face (21), and a notch portion (5) located opposite to the gear-side press-fit face (21) across the projected portion (23). The differential case (2) has a case-side press-fit face (6) which is annularly formed thereon and over which the gear-side press-fit face (21) is press fitted, a caulk portion (8) which is smaller than the case-side press-fit face (6) in outer diameter and caulked to the notch portion (5), and a case-side smooth face (9) which contacts the projected portion (23) to position the ring gear (3) with respect to the differential case (2). This arrangement serves to reduce the differential case (2) in size.</p> |
