| 摘要 |
PROBLEM TO BE SOLVED: To provide a hub unit capable of preventing a bolt hole into which a hub bolt for fixing a wheel is pressed, from exposing to the outside.SOLUTION: A hub unit is equipped with an outer ring member 1, and an inner ring member coaxially arranged with the outer ring member on an inner side of the outer ring member. A wheel installing flange 11 is formed on the inner ring member, and a plurality of bolt holes 12 into which hub bolts 13 for fixing a wheel are pressed is formed on the wheel installing flange in a circumferential direction. A notch is formed on a side part of a head portion 13a of a part of the hub bolt. If the minimum value of a distance from a shaft core of the hub bolt to a notch edge in the notch is made to be A, and a radius of the bolt hole on a side on which the hub bolt is pressed in is made to be B, an expression A≥B is established.SELECTED DRAWING: Figure 1 |
