Damper device

Patent metadata

Field	Value
Publication number	US-10895302-B2
Application number	US-201515303896-A
Country	US
Kind code	B2
Filing date	Apr 20, 2015
Priority date	Apr 30, 2014
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

In a damper device, a dynamic damper is coupled to a first intermediate member, first and second inner-side springs that act in series with each other are straight coil springs disposed between a second intermediate member and a driven member so that outward movement of the springs in a radial direction of the damper device is restricted at respective both ends, and a gap is formed between each body portion of the first and the second inner-side springs and the second intermediate member or a spring abutment portion of the driven member.

First claim

The invention claimed is:

1. A damper device comprising:
an input element;
a first intermediate element;
a second intermediate element;
an output element;
a plurality of first elastic bodies that transmits torque between the input element and the first intermediate element;
a plurality of second elastic bodies that transmits torque between the first intermediate element and the second intermediate element;
a plurality of third elastic bodies that acts in series with the second elastic bodies and transmits torque between the second intermediate element and the output element; and
a dynamic damper that includes a mass body and vibration absorbing elastic bodies, wherein
the vibration absorbing elastic bodies of the dynamic damper are directly coupled to the first intermediate element;
the second elastic bodies are straight coil springs disposed between the first intermediate element and the second intermediate element and the third elastic bodies are straight coil springs disposed between the second intermediate element and the output element so that outward movement of the second and the third elastic bodies in a radial direction of the damper device is restricted at respective both end portions; and
a gap is formed between each body portion of the second and the third elastic bodies and a corresponding one of the second intermediate element and the output element disposed on an outer side of each of the second and the third elastic bodies in the radial direction,
wherein damper device is configured so that torque is transferred in an order such that the torque is transferred from the input element to the first intermediate element, the torque transferred to the first intermediate element is then transferred to the second intermediate element, and then the torque transferred to the second intermediate element is transferred to the output element.

2. The damper device according to claim 1 , wherein
the second and the third elastic bodies are disposed on an inner side of the first elastic bodies in the radial direction so as to be alternately side by side in a circumferential direction of the damper device.

3. The damper device according to claim 1 , wherein
the first elastic bodies are arc coil springs; and
the input element includes at least one member that supports the first elastic bodies from an outer side in the radial direction and from one side in an axial direction of the damper device.

4. The damper device according to claim 3 , wherein
the input element includes the at least one member that supports at least an outer peripheral portion and a side portion of the one side of each of the first elastic bodies, and a second member that is coupled to the at least one member via a plurality of fastening tools and supports at least an inner peripheral side of a side portion on an opposite side from the one side of each of the first elastic bodies; and
the plurality of fastening tools is disposed on a radially inner side of the first elastic bodies.

5. The damper device according to claim 1 , wherein
the second intermediate element is an annular member that surrounds the output element, and includes a plurality of intermediate-side abutment portions each projecting from an inner peripheral surface of the second intermediate element inward radially and each abutting, between the second and the third elastic bodies that are adjacent to each other, against each end surface of the second and the third elastic bodies; and
the gap is formed between each body portion of the second and the third elastic bodies and the inner peripheral surface of the second intermediate element.

6. The damper device according to claim 5 , wherein
the inner peripheral surface of the second intermediate element includes:
a plurality of radial support surfaces that is each formed on both sides of each of the intermediate-side abutment portions in the circumferential direction and each supports an outer peripheral surface of each end portion of the second or the third elastic bodies from the outer side in the radial direction; and
a plurality of flank surfaces each being positioned on an outer side of each of the radial support surfaces in the radial direction and each being formed so as to be further away from each of the intermediate-side abutment portions than each of the radial support surfaces in the circumferential direction.

7. The damper device according to claim 6 , wherein
the output element includes a plurality of output-side abutment portions each projecting from an outer peripheral surface of the output element toward an outer side in the radial direction so as to abut against each end surface of the third elastic bodies;
each of the output-side abutment portions includes an abutment surface that abuts against each of the end surfaces of the third elastic bodies, and a radial support portion that projects in the circumferential direction on an outer side of the abutment surface in the radial direction and supports an outer peripheral surface of each end portion of the third elastic bodies from an outer side in the radial direction; and
in a state in which the damper device is attached, a part of the second intermediate member and each of the radial support portions of the output element face each other at intervals in the circumferential direction.

8. The damper device according to claim 7 , wherein
each of the output-side abutment portions further includes a second abutment surface that abuts against the each of the end surfaces of the second elastic bodies on an opposite side from the abutment surface, and a second radial support portion that projects in the circumferential direction on an outer side of the second abutment surface in the radial direction and supports an outer peripheral surface of each end portion of the second elastic bodies from an outer side in the radial direction; and
in a state in which the damper device is attached, a part of the second intermediate member and each of the second radial support portions face each other at intervals in the circumferential direction.

9. The damper device according to claim 7 , wherein
the inner peripheral surface of the second intermediate member includes stopper surfaces that each extends from an end portion on an opposite side of each of the flank surfaces from the radial support surface side toward an outer peripheral surface of the second intermediate member, and facing surfaces that each extends from an end portion of each of the stopper surfaces that is closer to the outer peripheral surface and each faces an outer peripheral surface of each of the output side abutment portion at intervals in the circumferential direction; and
each of the stopper surfaces of the second intermediate member and each of the radial support portions of the output element face each other at intervals in the circumferential direction in a state in which the damper device is attached, and configure a stopper that restricts relative rotation between the second intermediate member and the output element.

10. The damper device according to claim 1 , wherein
the input element is coupled to an output shaft of an internal combustion engine by a lock-up clutch; and
during a period of time until a rotational speed of the input element reaches a rotational speed that is higher than a lock-up rotational speed of the lock-up clutch by at least 500 to 1000 rpm, a gap is formed between each body portion of the second and the third elastic bodies and each member disposed on an outer side of the second and the third elastic bodies in the radial direction.

11. The damper device according to claim 1 , wherein
the mass body of the dynamic damper includes

Assignees

• Aisin Aw Co

Inventors

• Ito Kazuyoshi
• Otsuki Akiyoshi
• Hirai Yuichiro
• Wajima Masaki

Classifications

• F16F15/12373 Primary

  the sets of springs being arranged at substantially the same radius · CPC title

• F16F15/1217

  Motion-limiting means, e.g. means for locking the spring unit in pre-defined positions (F16F15/1202, F16F15/1338 take precedence) · CPC title

• F16F15/12313

  characterised by the dimension or shape of spring-containing windows · CPC title

• F16F15/1414

  Masses driven by elastic elements (F16F15/145, F16F15/1464 take precedence) · CPC title

• F16H2045/0231

  arranged in series · CPC title