Back to results
US 9,511,629 B2Granted
Bearing device for a wheel
AssigneeNtn Corporation
InventorsAkira Torii, Hiroshi Kawamura, Kiyoshige Yamauchi, Masahiro Ozawa, Tohru Nakagawa, Yuichi Asano, Mitsuru Umekida, Hisaaki Kura, Shin Tomogami
Life of this patent
Estimating the term…
Abstract
A bearing device includes a recess-projection fitting structure in which a 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.
Claims22
A bearing device for a wheel, the bearing device comprising:
- a hub wheel;
- a constant velocity universal joint;
- and
- a double-row roller bearing comprising:
- an outer member having an inner circumference in which double-row outer raceway surfaces are formed;
- an inner member including
- the hub wheel having an outer circumference in which one of inner raceway surfaces opposed to the double-row outer raceway surfaces is provided, and
- an inner race externally fitted onto the hub wheel and having an outer circumference in which another one of the inner raceway surfaces opposed to the double-row outer raceway surfaces is formed;
- and
- balls accommodated in double rows between both the raceway surfaces of the inner member and the outer member so as to freely roll,
- the hub wheel, the double-row roller bearing, and the constant velocity universal joint being unitized together,
- wherein a recess-projection fitting structure, in which the hub wheel and a shaft section of an outer joint member of the constant velocity universal joint are integrated with each other, is provided, the recess-projection fitting structure being configured such that projections, which are provided on one of an outer surface of the shaft section of the outer joint member and an inner surface of a hole of the hub wheel so as to extend in an axial direction, are press-fitted to another one of the outer surface of the shaft section and the inner surface of the hole along the axial direction, and that recesses, which intimately fit on the projections, are formed in the another one of the outer surface of the shaft section and the inner surface of the hole by the projections, and that entire regions of fitting contact regions between the projections and the recesses are brought into intimate contact with each other,
- wherein fitting between the inner race and a small diameter step section at an area corresponding to an outer surface side of the recess-projection fitting structure is non-interference fitting, and the fitting between the inner race and the small diameter step section at another area is interference fitting, and
- wherein a circumferential notch section is formed in an inner surface of the inner race in the area corresponding to the outer surface side of the recess-projection fitting structure, whereby the non-interference fitting is realized.
11 more elements
A bearing device for a wheel, the bearing device comprising:
- a hub wheel;
- a constant velocity universal joint;
- and
- a double-row roller bearing comprising:
- an outer member having an inner circumference in which double-row outer raceway surfaces are formed;
- an inner member including
- the hub wheel having an outer circumference in which one of inner raceway surfaces opposed to the double-row outer raceway surfaces is provided, and
- an inner race externally fitted onto the hub wheel and having an outer circumference in which another one of the inner raceway surfaces opposed to the double-row outer raceway surfaces is formed;
- and
- balls accommodated in double rows between both the raceway surfaces of the inner member and the outer member so as to freely roll,
- the hub wheel, the double-row roller bearing, and the constant velocity universal joint being unitized together,
- wherein a recess-projection fitting structure, in which the hub wheel and a shaft section of an outer joint member of the constant velocity universal joint are integrated with each other, is provided, the recess-projection fitting structure being configured such that projections, which are provided on one of an outer surface of the shaft section of the outer joint member and an inner surface of a hole of the hub wheel so as to extend in an axial direction, are press-fitted to another one of the outer surface of the shaft section and the inner surface of the hole along the axial direction, and that recesses, which intimately fit on the projections, are formed in the another one of the outer surface of the shaft section and the inner surface of the hole by the projections, and that entire regions of fitting contact regions between the projections and the recesses are brought into intimate contact with each other,
- wherein fitting between the inner race and a small diameter step section at an area corresponding to an outer surface side of the recess-projection fitting structure is non-interference fitting, and the fitting between the inner race and the small diameter step section at another area is interference fitting, and
- wherein a circumferential notch section is formed in an outer surface of the small diameter step section in the area corresponding to the outer surface side of the recess-projection fitting structure, whereby the non-interference fitting is realized.
11 more elements
Dependencies are inferred from the claim text.