Patent ID: 9039286
Filing Date: 2015-05-26
Classification: B60B,F16C,F16D,Y10T

Abstract:
1. A bearing device for a wheel, the bearing device comprising: a bearing; and an outer joint member having a shaft section, the shaft section having an outer diameter surface with a projection extending axially therefrom, wherein the bearing comprises an outer member having double-row outer raceway surfaces, an inner member having double-row inner raceway surfaces, and rolling elements in double rows interposed between the double-row outer raceway surfaces of the outer member and the double-row inner raceway surfaces of the inner member, the inner member has a hub wheel having a hole and a flange for attachment to a wheel, the hole having an inner diameter surface with a small recess provided thereat, an end of the hub wheel has a caulked portion formed thereat, the caulked portion applying a preload to the bearing, the shaft section of the outer joint member is inserted in a fitting manner into the hole of the hub wheel and is coupled to the hub wheel, and the projection is press-fitted along an axial direction into the small recess, and a recess is formed in the hole of the hub wheel by cutting the small recess by the press-fitting of the projection, to thereby form a recess-projection fitting structure in which the projection and the recess are held in close contact with each other over an entire region of fitting contact regions therebetween.