Damper device

Patent metadata

Field	Value
Publication number	US-11661971-B2
Application number	US-202117191462-A
Country	US
Kind code	B2
Filing date	Mar 3, 2021
Priority date	Apr 3, 2020
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

A damper device includes first and second rotors, a first pre-damper, and a first main elastic member. The second rotor includes a hub and a flange. The first pre-damper elastically couples the hub and the flange in a rotational direction, and is actuated in a first range of torsion angle between the first and second rotors. The first main elastic member elastically couples the first and second rotors in the rotational direction, and is actuated in a greater second range of torsion angle. The first pre-damper includes first and second subordinate elastic members. The first subordinate elastic member is compressed in a neutral state, and urges the flange to a first side in the rotational direction with respect to the hub. The second subordinate elastic member is compressed in the neutral state, and urges the flange to a second side in the rotational direction with respect to the hub.

First claim

What is claimed is:

1. A damper device comprising:
a first rotor;
a second rotor rotatable relative to the first rotor, the second rotor including a hub and a flange, the hub having a tubular shape, the flange disposed on an outer peripheral side of the hub to be rotatable relative to the hub;
a first pre-damper configured to elastically couple the hub and the flange in a rotational direction, the first pre-damper actuated in a first range of torsion angle between the first rotor and the second rotor; and
a first main elastic member disposed in a different position from the first pre-damper in a circumferential direction, the first main elastic member configured to elastically couple the first rotor and the second rotor in the rotational direction, the first main elastic member actuated in a second range of torsion angle greater than the first range of torsion angle, wherein
the first pre-damper includes a first subordinate elastic member and a second subordinate elastic member,
the first subordinate elastic member is compressed in a neutral state without relative rotation between the hub and the flange, the first subordinate elastic member configured to urge the flange to a first side in the rotational direction with respect to the hub, and
the second subordinate elastic member is compressed in the neutral state, the second subordinate elastic member configured to urge the flange to a second side in the rotational direction with respect to the hub,
the hub includes a plurality of first engaging portions and a support portion on an outer peripheral surface thereof,
the flange includes a plurality of second engaging portions and a holding cutout on an inner peripheral surface thereof, the plurality of second engaging portions opposed to the plurality of first engaging portions at intervals in the circumferential direction, the holding cutout having a predetermined width, the holding cutout allowing the support portion to be inserted therein,
the first subordinate elastic member is compressed between the support portion and a first end of the holding cutout, and
the second subordinate elastic member is compressed between the support portion and a second end of the holding cutout,
the first and second subordinate elastic members directly opposing each other across the support portion, whereby the flange is biased toward a neutral position relative to the hub when the flange and the hub are not subjected to a relative torque.

2. The damper device according to claim 1 , wherein
the first subordinate elastic member is further compressed when the hub is rotated to the first side in the rotational direction with respect to the flange, and
the second subordinate elastic member is further compressed when the hub is rotated to the second side in the rotational direction with respect to the flange.

3. The damper device according to claim 1 , wherein
the first subordinate elastic member expands when the hub is rotated to the second side in the rotational direction with respect to the flange, and
the second subordinate elastic member expands when the hub is rotated to the first side in the rotational direction with respect to the flange.

4. The damper device according to claim 1 , further comprising:
a stopper mechanism configured to restrict an angle of relative rotation between the first rotor and the second rotor to a predetermined angular range, wherein
the flange includes a first window hole configured to accommodate the first main elastic member,
the stopper mechanism includes a first cutout, a second cutout, and two stop members, the first and second cutouts provided in the flange, the two stop members fixed to the first rotor,
the first cutout is provided on a first side of the first window hole in the circumferential direction so as to extend in the circumferential direction,
the second cutout is made in shape of a hole, the second cutout provided on a second side of the first window hole in the circumferential direction so as to extend in the circumferential direction, the second cutout communicating with the first window hole at a first end thereof closer to the first window hole than a second end thereof, and
the two stop members are movable in the circumferential direction within the first cutout and the second cutout respectively.

5. The damper device according to claim 4 , wherein the first cutout is provided apart from the first window hole.

6. The damper device according to claim 5 , wherein
the first cutout is provided in a circular-arc shape having a first pitch radius, and
the second cutout is provided in a circular-arc shape having a second pitch radius, the second pitch radius defined on an inner peripheral side of the first pitch radius.

7. The damper device according to claim 6 , wherein
the first window hole includes a protruding portion on one of pressing surfaces provided therein in the circumferential direction, the protruding portion protruding to bulge in the circumferential direction from a radially middle part of the one of pressing surfaces, and
the first cutout protrudes toward the protruding portion at a first end thereof located closer to the first window hole than a second end thereof.

8. The damper device according to claim 1 , further comprising:
a second main elastic member disposed radially outside the first pre-damper, the second main elastic member configured to elastically couple the first rotor and the second rotor in the rotational direction, wherein
the first rotor includes a pair of window portions each greater in circumferential length than the second main elastic member, and
the flange includes a pair of window holes each configured to accommodate the second main elastic member.

9. The damper device according to claim 8 , further comprising:
a second pre-damper opposed to the first pre-damper through a rotational axis of the first rotor, the second pre-damper configured to elastically couple the hub and the flange in the rotational direction together with the first pre-damper;
a third main elastic member opposed to the first main elastic member through the rotational axis of the first rotor, the third main elastic member configured to elastically couple the first rotor and the second rotor in the rotational direction together with the first main elastic member; and
a fourth main elastic member opposed to the second main elastic member through the rotational axis of the first rotor, the fourth main elastic member disposed radially outside the second pre-damper, the fourth main elastic member configured to elastically couple the first rotor and the second rotor in the rotational direction together with the second main elastic member.

10. The damper device according to claim 9 , wherein the first and third main elastic members comprise coil springs.

11. The damper device according to claim 9 , wherein the second and fourth main elastic members comprise resin members.

12. The damper device according to claim 8 , wherein the second main elastic member comprises a resin member.

13. The damper device according to claim 1 , wherein the first main elastic member comprises a coil spring.

Assignees

• Exedy Corp

Inventors

• Uehara Hiroshi

Classifications

• F16F2230/007

  with, or used as an end stop or buffer; Limiting excessive axial separation · CPC title

• F16F15/137

  the elastic members consisting of two or more springs of different kinds, {e.g. elastomeric members and wound springs} · CPC title

• F16F15/12366

  acting on multiple sets of springs · CPC title

• F16F15/1238

  with pre-damper, i.e. additional set of springs between flange of main damper and hub · CPC title

• F16F15/12346 Primary

  Set of springs, e.g. springs within springs · CPC title