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US 9,945,444 B2Granted
Lock-up device
AssigneeExedy Corporation
InventorNaoki Tomiyama
Life of this patent
Estimating the term…
Abstract
A lock-up device includes a drive plate, a driven plate, first torsion springs, second torsion springs, a spring holder and a rotation restricting unit. The rotation restricting unit is configured to restrict and bring the first torsion spring in each group and the second torsion spring in each group to a deactivated state by at least either of engagement of the spring holder with the driven plate or engagement of the drive plate with the spring holder.
Claims10
A lock-up device for transmitting torque and for absorbing and attenuating torsional vibration, comprising:
- an input rotary member;
- an output rotary member disposed to be rotatable with respect to the input rotary member;
- a plurality of groups of first elastic members, the first elastic members in each group being configured to be circumferentially compressed in series by relative rotation between the input rotary member and the output rotary member;
- a plurality of second elastic members respectively having free lengths shorter than free lengths of the first elastic members and being respectively disposed in inner peripheral parts of the first elastic members;
- a float member restricting radial movement of the plurality of groups of the first elastic members;
- and
- an activation restricting mechanism configured to restrict and bring one of the first elastic members in each group and the second elastic member disposed in the inner peripheral part of the one of the first elastic members in each group to a deactivated state by at least either of engagement of the float member with the output rotary member or engagement of the input rotary member with the float member.
4 more elements
Dependencies are inferred from the claim text.