Pulley unit
AssigneeKoyo Seiko Co., Ltd.
InventorsJunya Ooitsu, Yasuhito Tanaka, Hajime Tazumi, Yoshitaka Nakagawa
Life of this patent
Estimating the term…
Abstract
In an annular space between a pulley and a shaft body disposed coaxially with each other, a one-way clutch is interposed in an intermediate range in an axial direction and rolling bearings are disposed on both sides in the axial direction of the one-way clutch. A tightening distance for fitting between the one-way clutch and pulley is set to be smaller than that between the rolling bearing and pulley. Due to this structure, in a condition in which an excessive radial load acts upon the pulley, that radial load acts on not the one-way clutch but the rolling bearings on both sides thereof, so that a clutch operation of the one-way clutch can be carried out stably.
Claims7
A pulley unit comprising:
- a shaft body;
- a pulley disposed on said shaft body coaxially therewith;
- a one-way clutch disposed in an axially intermediate portion in an annular space between said pulley and shaft body, and having an outer ring having, on respective ends thereof, extending portions that extend axially from a range corresponding to a clutch functioning portion;
- and
- rolling bearings disposed between respective extending portions and said shaft body,
- wherein, in said outer ring of said one-way clutch, a circumferential fitting interference between said range corresponding to said clutch functioning portion and said pulley is set to be smaller than that between said extending portions and said pulley.
A pulley unit comprising:
- a shaft body;
- a pulley disposed on said shaft body coaxially therewith;
- a one-way clutch disposed in an axially intermediate portion in an annular space between said pulley and shaft body, and having an outer ring, said outer ring having, on respective ends thereof, extending portions that extend axially from a range corresponding to a clutch functioning portion;
- and
- rolling bearings disposed between respective extending portions and said shaft body, wherein:
- said extending portions are expanded outward in the diameter direction by pressure of said rolling bearings pressing outward with respect to said extending portions, and
- a first circumferential fitting interference between said range corresponding to said clutch functioning portion and said pulley is set to be smaller than a second circumferential fitting interference between said extending portions and said pulley.
A pulley unit comprising:
- a shaft body;
- a pulley disposed on said shaft body coaxially therewith;
- a one-way clutch disposed in an axially intermediate portion in an annular space between said pulley and shaft body, and having an outer ring having, on respective ends thereof, extending portions that extend axially from a range corresponding to a clutch functioning portion;
- and
- rolling bearings disposed between respective extending portions and said shaft body,
- wherein a peripheral groove forming a predetermined gap relative to the pulley is provided in an outer peripheral face of said outer ring of said one-way clutch in said range corresponding to said clutch functioning portion.
A pulley unit comprising:
- a shaft body;
- a pulley disposed on said shaft body coaxially therewith;
- a one-way clutch disposed in an axial direction in an annular space between said pulley and shaft body, and having an outer ring having, on respective ends thereof, extending portions that extend axially from a range corresponding to a clutch functioning portion;
- and
- rolling bearings disposed between respective extending portions and said shaft body,
- wherein a peripheral groove forming a predetermined gap relative to said outer ring of said one-way clutch is provided in an inner peripheral face of said pulley in said range corresponding to said clutch functioning portion.
Dependencies are inferred from the claim text.