| 摘要 |
A drive-wheel axle unit which prevents the mutual contact portion between a caulk portion ( 29 a) of a hub ( 6 a) and an outer-end face ( 39 ) of a housing portion ( 11 ) of a drive shaft member ( 31 ) from being exhausted, thereby preventing the occurrence of shaky motion, strange sounds and vibrations for a long period of time. A flat surface ( 38 ) is formed in the end face of the caulk portion ( 29 a), and is contacted over a large area with the outer end face ( 39 ), which makes it possible to reduce the contact surface pressure in the mutual contact portion between the flat surface ( 38 ) and outer end face ( 39 ). |
