US 2026/0298309 A1Published application

Damper device

AssigneesNissan Motor Co., Ltd., Exedy Corporation

InventorsMakoto OGATA, Satoshi YOSHIDA, Takeshi SENOUE, Yuji FUKUTA, Katsunari KATO

Life of this patent

Estimating the term…

Loading patent…

Abstract

A cylindrical section extends in an axial direction from an inner circumferential edge of a disc section of a bush, and is interposed between an inner circumferential end edge of a retaining plate and an outer peripheral surface of a boss part. Dimensions of the cylindrical section are set so as to limit a deflection angle of a central axis within a prescribed range when the boss part is inclined. When the boss part is inclined during the step for connecting to a gear box, the cylindrical section is sandwiched between the inner circumferential end edge of the retaining plate and the boss part, thereby limiting the deflection angle of the central axis. Dimensions of a claw section are set such that a bending stress with the maximum deflection angle does not cause breakage.

A damper device comprising:

a first rotor;
a second rotor arranged to rotate with respect to the first rotor, wherein the second rotor includes a boss part at a center of the second rotor;
a spring member connecting the first rotor and the second rotor elastically in a rotational direction;
and
a friction-producing mechanism structured to produce a frictional torque in response to relative rotation between the first rotor and the second rotor;
wherein the friction-producing mechanism includes:
a bushing having an annular shape, and fitted on an outer periphery of the boss part, and arranged to rotate with respect to the boss part, wherein the bushing has an end surface in contact with an annular friction surface of the second rotor;
a retaining plate of the first rotor, wherein the retaining plate faces the bushing in an axial direction;
and
a conical spring having an annular shape, and arranged in a compressed state between the bushing and the retaining plate to bias the bushing toward the annular friction surface;
wherein the bushing includes:
a disc portion located between the annular friction surface and the conical spring;
a tubular portion extending in the axial direction from an inner periphery of the disc portion and between the outer periphery of the boss part and an inner periphery of the retaining plate;
and
claw portions each of which protrudes radially outwardly from a corresponding one of locations of an outer periphery of the disc portion;
wherein each of the claw portions engages with an engagement recess formed in an annular member that rotates integrally with the first rotor;
and
wherein the tubular portion is structured to limit an angle of deviation of a central axis of the boss part with respect to a central axis of the first rotor so as to prevent the claw portions from being broken due to a bending stress, by being sandwiched between the inner periphery of the retaining plate and the boss part in response to inclination of the central axis of the boss part with respect to the central axis of the first rotor.

15 more elements

Abstract

Claims7