Power transmission device
AssigneeKabushiki Kaisha F.C.C.
InventorsYoshihiko Ozawa, Han Hiong Chen, Makoto Kataoka, Masataka Murai, Kaoru Aono, Yuta Kine, Yuta Yokomichi
Life of this patent
Estimating the term…
Abstract
A power transmission device has a back torque transmission cam that brings driving clutch plates 6 and driven clutch plates 7 into press contact with each other. This occurs by moving a second clutch member 4b when a rotational force is input to a first clutch member 4a, via the output shaft 3. A pressure member 5 is located at a non-actuation position. A back torque transmission cam can hold abutment between an interlocking member 9 and weight member 8 by moving the second clutch member 4b in a direction of being brought into proximity to the interlocking member 9.
Claims5
A power transmission device comprising:
- a clutch housing rotatable together with an input member, the input member is rotatable by a drive force of an engine of a vehicle, a plurality of driving clutch plates attached to the clutch housing;
- a clutch member coupled to an output member that can rotate a wheel of the vehicle, a plurality of driven clutch plates attached to the clutch member, the driven clutch plates are alternately positioned with the driving clutch plates of the clutch housing;
- a pressure member movable between an actuation position and a non-actuation position, in the actuation position drive force of the engine can be transmitted to the wheel with the driving clutch plates and the driven clutch plates brought into press contact with each other, in the non-actuation position, transmission of the drive force of the engine to the wheel can be blocked by releasing a press-contact force between the driving clutch plates and the driven clutch plates;
- a weight member disposed in a groove portion in the clutch housing, the groove portion extend in a radial direction, the weight member is movable, by a centrifugal force due to rotation of the clutch housing, from a radially inner position to a radially outer position of the groove portion;
- and
- an interlocking member moving the pressure member from the non-actuation position to the actuation position as the weight member is moved from the radially inner position to the radially outer position;
- the clutch member comprising:
- a first clutch member coupled to the output member,
- a second clutch member attached to the driven clutch plates,
- a back torque transmission cam brings the driving clutch plates and the driven clutch plates into press contact with each other by moving the second clutch member when the pressure member is located at the non-actuation position and a rotational force is input to the first clutch member via the output member;
- and
- the back torque transmission cam can hold abutment between the interlocking member and the weight member by moving the second clutch member in a direction of being brought into proximity to the interlocking member.
Dependencies are inferred from the claim text.