Damper device

Patent metadata

Field	Value
Publication number	US-10309483-B2
Application number	US-201515501663-A
Country	US
Kind code	B2
Filing date	Sep 14, 2015
Priority date	Sep 12, 2014
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

A damper device with a first intermediate element; a second intermediate element; a first elastic body that transmits torque between the input element and the first intermediate element; a second elastic body that transmits torque between the first intermediate element and the output element; a third elastic body that transmits torque between the input element and the second intermediate element; a fourth elastic body that transmits torque between the second intermediate element and the output element; and a fifth elastic body that transmits torque between the first intermediate element and the second intermediate element.

First claim

The invention claimed is:

1. A damper device comprising:
an input element to which torque from an engine is transmitted;
an output element;
a first intermediate element;
a second intermediate element;
a first elastic body that transmits torque between the input element and the first intermediate element;
a second elastic body that transmits torque between the first intermediate element and the output element;
a third elastic body that transmits torque between the input element and the second intermediate element;
a fourth elastic body that transmits torque between the second intermediate element and the output element; and
a fifth elastic body that transmits torque between the first intermediate element and the second intermediate element.

2. The damper device according to claim 1 , wherein
a natural frequency of the first intermediate element when torque is transmitted from the input element to the output element via all the first to fifth elastic bodies is different from a natural frequency of the second intermediate element when torque is transmitted from the input element to the output element via all the first to fifth elastic bodies.

3. The damper device according to claim 2 , wherein
when torque is transmitted from the input element to the output element via all the first to fifth elastic bodies, one of a set of vibrations transmitted from the second elastic body to the output element and a set of vibrations transmitted from the fourth elastic body to the output element cancels at least part of the other set of vibrations of the set of vibrations transmitted from the second elastic body to the output element and the set of vibrations transmitted from the fourth elastic body to the output element.

4. The damper device according to claim 2 , wherein
the fifth elastic body transmits, to the first intermediate element or the second intermediate element, part of torque transmitted from the input element to the second intermediate element via the third elastic body or part of torque transmitted from the input element to the first intermediate element via the first elastic body.

5. The damper device according to claim 1 , wherein
when torque is transmitted from the input element to the output element via all the first to fifth elastic bodies, one of a set of vibrations transmitted from the second elastic body to the output element and a set of vibrations transmitted from the fourth elastic body to the output element cancels at least part of the other set of vibrations of the set of vibrations transmitted from the second elastic body to the output element and the set of vibrations transmitted from the fourth elastic body to the output element.

6. The damper device according to claim 1 , wherein
the fifth elastic body transmits, to the first intermediate element or the second intermediate element, part of torque transmitted from the input element to the second intermediate element via the third elastic body or part of torque transmitted from the input element to the first intermediate element via the first elastic body.

7. The damper device according to claim 6 , wherein
deformation of the first to fifth elastic bodies is not restricted until input torque transmitted to the input element becomes equal to or greater than a predetermined threshold.

8. The damper device according to claim 1 , wherein
when stiffness of the first elastic body is “k 11 ”, stiffness of the second elastic body is “k 12 ”, stiffness of the third elastic body is “k 21 ”, and stiffness of the fourth elastic body is “k 22 ”, the stiffnesses k 11 , k 12 , k 21 , and k 22 of the first to fourth elastic bodies are selected so as to satisfy k 11 ≠k 21 and k 11 /k 21 ≠k 12 /k 22 .

9. The damper device according to claim 8 , wherein
the stiffnesses k 11 , k 12 , k 21 , and k 22 of the first to fourth elastic bodies are selected so as to satisfy k 11 /k 21 <k 12 /k 22 .

10. The damper device according to claim 8 , wherein
the stiffnesses k 11 , k 12 , k 21 , and k 22 of the first to fourth elastic bodies are selected so as to satisfy k 11 <k 12 <k 22 ≤k 21 .

11. The damper device according to claim 8 , wherein
when stiffness of the fifth elastic body is “k m ”, the stiffnesses k 11 , k 12 , k 21 , k 22 , and k m of the first to fifth elastic bodies are selected so as to satisfy k 11 <k m <k 12 <k 22 ≤k 21 .

12. The damper device according to claim 8 , wherein
a stiffness of the fifth elastic body is higher than the stiffnesses k 11 , k 12 , k 21 , and k 22 of the first to fourth elastic bodies.

13. The damper device according to claim 8 , wherein
a stiffness of the fifth elastic body is lower than the stiffnesses k 11 , k 12 , k 21 , and k 22 of the first to fourth elastic bodies.

14. The damper device according to claim 1 , wherein
moment of inertia of the first intermediate element is larger than moment of inertia of the second intermediate element.

15. The damper device according to claim 1 , wherein
the first intermediate element is coupled to a turbine runner that forms a fluid transmission apparatus along with a pump impeller so as to rotate together therewith.

16. The damper device according to claim 1 , wherein
when torque transmitted by the first elastic body is “T 11 ”, torque transmitted by the second elastic body is “T 12 ”, torque transmitted by the third elastic body is “T 21 ”, and torque transmitted by the fourth elastic body is “T 22 ”,
T 11 /( T 11 +T 21 )< T 12 /( T 12 +T 22 ),
0.07≤ T 11 /( T 11 +T 21 )≤0.28, and

0.12≤ T 12 /( T 12 +T 22 )≤0.42

are satisfied.

17. The damper device according to claim 1 , wherein
when torque transmitted by the first elastic body is “T 11 ”, torque transmitted by the second elastic body is “T 12 ”, torque transmitted by the third elastic body is “T 21 ”, and torque transmitted by the fourth elastic body is “T 22 ”, and when torque transmitted by the fifth elastic body is “T m ”,
at least either one of 0<T m /(T 11 +T 21 )≤0.35 and 0<T m /(T 12 +T 22 )≤0.35 is satisfied.

18. The damper device according to claim 1 , wherein
based on frequency at an antiresonance point where vibration amplitude of the output element becomes zero, spring constants of the first, second, third, fourth, and fifth elastic bodies and moments of inertia of the first and second intermediate elements are determined.

19. The damper device according to claim 18 , wherein
based on the frequency at the antiresonance point and the number of cylinders of the engine, the spring constants of the first, second, third, fourth, and fifth elastic bodies and the moments of inertia of the first and second intermediate elements are determined.

20. The damper device according to claim 19 , wherein
when the frequency at the antiresonance point where vibration amplitude of the output element becomes zero is “fa” and the number of cylinders of the engine is “n”,
500 rpm≤(120/ n )· fa≤ 1500 rpm

is satisfied.

21. The damper device according to claim 20 , wherein
900 rpm≤(120/ n )· fa≤ 1200 rpm

is satisfied.

22. The damper device according to claim 20 , wherein
the frequency fa at the antiresonance point is represented by Formula (1):

fa
=

1

Assignees

• Aisin Aw Co

Inventors

• Takikawa Yoshihiro
• Nagai Hiroki
• Wajima Masaki
• Sakamoto Takao
• Itou Kazuhiro

Classifications

• F16F15/13492 Primary

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

• F16H45/02 Primary

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title

• F16H2045/0294

  Single disk type lock-up clutch, i.e. using a single disc engaged between friction members · CPC title

• F16D2300/22

  Vibration damping · CPC title

• F16D13/40

  in which the or each axially-movable member is pressed exclusively against an axially-located member · CPC title