Patent ID: 8998731
Filing Date: 2015-04-07
Classification: B60B,B60Y,F16C,F16D,Y10T

Abstract:
1. A wheel bearing device comprising: a wheel bearing including: a bolt member; and a constant velocity universal joint having an outer joint member including a shaft portion with a bolt hole, wherein one of the shaft portion of the outer joint member and the hole portion of the hub wheel has projections extending in an axial direction that are press-fitted into another of the shaft portion of the outer joint member and the hole portion of the hub wheel to form recesses therein by the projections, the recesses and the projections forming a recess-projection fitting structure where an entire area of fitting sites of the projections and the recesses is brought into close contact, the bolt member is screwed into the bolt hole and fastens the hub wheel to the outer joint member via the inner wall of the hub wheel, when the bolt member is detached, a drawing force applied in the axial direction separates the recess-projection fitting structure, if a seating surface outer diameter of the bolt member is d an end surface of the caulking portion and an end surface of the outer joint member, which are opposed to each other, are in contact while an end surface of the shaft portion of the outer joint member and an end surface of the inner wall of the hub wheel, which are opposed to each other, are free from contact, and the hub wheel is sandwiched between the bolt member and the outer joint member in the axial direction.