| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an improved technique for a driving wheel axle structure capable of effectively preventing and suppressing generation of abnormal sound by stick-slip. <P>SOLUTION: In this driving wheel axle structure, a stationary ring 2, rotary rings 4 (a hub 12 and an inner ring constitution body 16) and a plurality of rolling bodies 18 are provided, and the rotary rings 4 are fixed to a CVJ (Constant Velocity Joint) 92 by a fastening member 94 in a state that a spline shaft 92s of the CVJ 92 is inserted into a spline hole 12t formed in an inner diameter part of the hub 12 and an inner ring constitution body is butted against an extension direction terminal part (butting surface 92a) of the spline shaft 92s. In the spline hole 12t, a plurality of spline teeth are formed along a through direction in an inner peripheral part. In the spline shaft 92s, a plurality of spline teeth engageable with the spline teeth of the spline hole 12t are formed in an outer peripheral part along the extension direction. When an outer diameter in the extension direction terminal part of the spline shaft 92s against which the inner ring constitution body is butted is D and a pitch circle diameter of each of the spline teeth of the spline shaft 92s is d, a relation of D/d>2 is set. <P>COPYRIGHT: (C)2011,JPO&INPIT |
