Reverse-input shutoff clutch and rotation drive device
AssigneeNtn Corporation
InventorsMasahiro Kawai, Masahiro Kurita, Seiichi Takada, Atsushi Yoshioka
Life of this patent
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Abstract
A reverse-input shutoff clutch according to the invention includes an outer ring as an input-side rotation member, an inner ring as an output-side rotation member, rollers as torque transmission means, a cage for retaining the roller, a centering spring as an elastic member for positioning the cage, a housing as a stationary-side member, and a sliding spring coupled to and co-rotate with the cage while sliding against the housing. With the constitution described above, the clutch applies rotational resistance induced by friction resistance to the cage.
Claims16
A reverse-input shutoff clutch comprising:
- an input-side rotation member;
- an output-side rotation member;
- a torque transmission member that can be engaged with and disengaged from said input-side rotation member and the output-side rotation member in both positive and negative rotation directions;
- a cage for retaining said torque transmission member and switching between the engagement and disengagement of the torque transmission member through the relative rotation of the cage with respect to said input-side rotation member;
- a stationary-side member;
- an elastic member for connecting the input-side rotation member and the cage in both positive and negative directions;
- and
- rotational resistance applying means for causing slide friction resistance to act on the cage against its rotation with respect to the stationary-side member,
- wherein rotational resistance of the cage caused by the slide friction resistance is larger than elastic force of the elastic member, and
- wherein through the control of a rotational phase difference between the input-side rotation member and the cage, the transmission of positive and negative rotational torque from said input-side rotation member to the output-side rotation member is conducted by the engagement of the torque transmission member to said input-side and output-side rotation members, while the transmission of positive and negative rotational torque from said output-side rotation member is shutoff by the disengagement of said torque transmission member.
Dependencies are inferred from the claim text.