Manufacturing method for a bearing device for a wheel

Patent metadata

Field	Value
Publication number	US-9321309-B2
Application number	US-201514665177-A
Country	US
Kind code	B2
Filing date	Mar 23, 2015
Priority date	Mar 22, 2007
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

A bearing device for a wheel prevents backlash in a circumferential direction and has excellent workability for connecting a hub wheel and an outer joint member of a constant velocity universal joint. The bearing device includes a recess-projection fitting structure in which the hub wheel and a shaft section, which is fitted in a hole of the hub wheel of the outer joint member of the constant velocity universal joint, are unitized together. In the recess-projection fitting structure, entire fitting regions among projections on the outer surface of the shaft section of the outer joint member and recesses, which fit on the projections, are brought into intimate contact with each other.

First claim

The invention claimed is:

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.

Assignees

• Torii Akira
• Kawamura Hiroshi
• Yamauchi Kiyoshige
• Ozawa Masahiro
• Nakagawa Tohru
• Asano Yuichi
• Umekida Mitsuru
• Kura Hisaaki
• Tomogami Shin
• Ntn Toyo Bearing Co Ltd

Inventors

• Torii Akira
• Kawamura Hiroshi
• Yamauchi Kiyoshige
• Ozawa Masahiro
• Nakagawa Tohru
• Asano Yuichi
• Umekida Mitsuru
• Kura Hisaaki
• Tomogami Shin

Classifications

• B60B27/0084

  caulking to fix inner race · CPC title

• F16C2326/02

  Wheel hubs or castors · CPC title

• B60B27/0042

  characterised by the fixation of the homokinetic joint to the hub · CPC title

• B60B27/0005

  with ball bearings · CPC title

• F16C35/0635

  the bore of the inner ring being of special non-cylindrical shape which co-operates with a complementary shape on the shaft, e.g. teeth, polygonal sections · CPC title