US 10,968,978 B2Granted

Damper device

AssigneeExedy Corporation

InventorHiroshi Uehara

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Abstract

The present damper device includes a large hysteresis mechanism, generating a large hysteresis torque, and a hysteresis inhibiting mechanism. In a positive-side torsional region, when relative rotation is performed until reaching a maximum torsion angle from a neutral position, the hysteresis inhibiting mechanism deactivates the large hysteresis mechanism until the relative rotation reaches a first torsion angle from the neutral position, but activates the large hysteresis mechanism until the relative rotation reaches the maximum torsion angle from the first torsion angle; and when the relative rotation is performed until reaching the neutral position from the maximum torsion angle, the hysteresis inhibiting mechanism deactivates the large hysteresis mechanism until the relative rotation reaches a second torsion angle less than the first torsion angle from the maximum torsion angle, but activates the large hysteresis mechanism until the relative rotation reaches the neutral position from the second torsion angle.

Claims12

Dependent claims

A damper device for a vehicle transmitting a torque from a drive source to an output side therethrough, the damper device comprising:

an input-side rotor;
an output-side rotor rotatable relative to the input-side rotor;
a damper part adapted to elastically couple the input-side rotor and the output-side rotor in a rotational direction;
a first friction mechanism adapted to generate a first hysteresis torque in relative rotation between the input-side rotor and the output-side rotor;
and
a friction control mechanism adapted to control actuation of the first friction mechanism, wherein
in a positive-side torsional region in which the torque is transmitted from the drive source,
when the relative rotation is performed until reaching a maximum torsion angle from a neutral position without the relative rotation, the friction control mechanism deactivates the first friction mechanism until the relative rotation reaches a first torsion angle from the neutral position, the friction control mechanism activating the first friction mechanism until the relative rotation reaches the maximum torsion angle from the first torsion angle, and
when the relative rotation is performed until reaching the neutral position from the maximum torsion angle, the friction control mechanism deactivates the first friction mechanism until the relative rotation reaches a second torsion angle less than the first torsion angle from the maximum torsion angle, the friction control mechanism activating the first friction mechanism until the relative rotation reaches the neutral position from the second torsion angle.

6 more elements

A damper device for a vehicle transmitting a torque from a drive source to an output side therethrough, the damper device comprising:

an input-side rotor;
an output-side rotor rotatable relative to the input-side rotor;
a contact member attached to the input-side rotor;
a damper part adapted to elastically couple the input-side rotor and the output-side rotor in a rotational direction;
and
a friction mechanism adapted to generate a hysteresis torque in relative rotation between the input-side rotor and the output-side rotor, wherein
the friction mechanism includes a first friction mechanism and a second friction mechanism, the second friction mechanism adapted to generate a second hysteresis torque, the first friction mechanism generating a first hysteresis torque greater than the second hysteresis torque,
in a positive-side torsional region in which the torque is transmitted from the drive source, the second friction mechanism generates the second hysteresis torque within a first angular range in which the relative rotation is performed until reaching a first torsion angle from a neutral position without the relative rotation, and
in the positive-side torsional region, the first friction mechanism generates the first hysteresis torque greater than the second hysteresis torque in a state where the first friction mechanism contacts the contact member and the second friction mechanism contacts the input-side rotor within a second angular range in which the relative rotation is performed until reaching a maximum torsion angle from the first torsion angle, the second angular range narrower than the first angular range.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/703,217Filed 4 Dec 2019
Priority: JP JP2019-0185105 Feb 2019
Published: US 2020/0248779 A16 Aug 2020
Granted: 6 Apr 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

F16F 15/36
Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels: operating automatically , i.e. where, for…
F16D 13/38
With axially-movable clutching members: with flat clutching surfaces, e.g. discs
F16F 15/123
Using springs as elastic members, e.g. metallic springs: wound springs
F16F 15/1292
Characterised by friction-damping means: characterised by arrangements for axially clamping or positioning or otherwise influencing the frictional…