Patent ID: 9321309
Filing Date: 2016-04-26
CPC Classification: B60B,F16C,F16D,Y10T

Claim Text:
1. A manufacturing method for a bearing device for a wheel, the bearing device comprising: a bearing; and an outer joint member having a shaft section, 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 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, the manufacturing method comprising steps of: providing a projection with an outer diameter surface of the shaft section of the outer joint member, the projection being extended axially; providing a small recess with an inner diameter surface of the hub wheel; and forming a recess in the hole of the hub wheel by cutting the small recess by the projection press-fitted into the small recess along an axial direction, 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.