# US 10,309,483 B2 · Damper device

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- Number: US 10,309,483 B2
- Document ID: US10309483B2
- Status: Granted
- Kind: B2
- Application number: 15/501,663
- Filed: 2015-09-14
- Published: 2017-08-10
- Granted: 2019-06-04
- Earliest claimed: 2014-09-12
- Assignees: Aisin Aw Co., Ltd.
- Applicants: Aisin Aw Co., Ltd.
- Inventors: Yoshihiro Takikawa; Hiroki Nagai; Masaki Wajima; Takao Sakamoto; Kazuhiro Itou
- Web page: https://patentgrep.com/patent/US10309483B2

## CPC

- F16F 15/13492: {the sets of springs being arranged at substantially the same radius}
- F16D 13/64: Clutch-plates; Clutch-lamellae (brake-plates, brake-lamellae F16D65/12)
- F16F 15/1236: {resulting in a staged spring characteristic, e.g. with multiple intermediate plates}
- F16F 15/13476: {resulting in a staged spring characteristic, e.g. with multiple intermediate plates}
- F16H 45/02: with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14)
- F16D 13/40: in which the or each axially-movable member is pressed exclusively against an axially-located member
- F16D 2300/22: Vibration damping
- F16F 2228/007: of solids, e.g. hardness
- F16F 2228/066: Variable stiffness
- F16H 2045/0221: {with damping means}
- F16H 2045/0294: {Single disk type lock-up clutch, i.e. using a single disc engaged between friction members}
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16H: GEARING

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 2)

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.

### Claim 4 (depends on 2)

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.

### Claim 5 (depends on 1)

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.

### Claim 6 (depends on 1)

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.

### Claim 7 (depends on 6)

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.

### Claim 8 (depends on 1)

The damper device according to claim 1, wherein
when stiffness of the first elastic body is “k11”, stiffness of the second elastic body is “k12”, stiffness of the third elastic body is “k21”, and stiffness of the fourth elastic body is “k22”, the stiffnesses k11, k12, k21, and k22 of the first to fourth elastic bodies are selected so as to satisfy k11≠k21 and k11/k21≠k12/k22.

### Claim 9 (depends on 8)

The damper device according to claim 8, wherein
the stiffnesses k11, k12, k21, and k22 of the first to fourth elastic bodies are selected so as to satisfy k11/k21<k12/k22.

### Claim 10 (depends on 8)

The damper device according to claim 8, wherein
the stiffnesses k11, k12, k21, and k22 of the first to fourth elastic bodies are selected so as to satisfy k11<k12<k22≤k21.

### Claim 11 (depends on 8)

The damper device according to claim 8, wherein
when stiffness of the fifth elastic body is “km”, the stiffnesses k11, k12, k21, k22, and km of the first to fifth elastic bodies are selected so as to satisfy k11<km<k12<k22≤k21.

### Claim 12 (depends on 8)

The damper device according to claim 8, wherein
a stiffness of the fifth elastic body is higher than the stiffnesses k11, k12, k21, and k22 of the first to fourth elastic bodies.

### Claim 13 (depends on 8)

The damper device according to claim 8, wherein
a stiffness of the fifth elastic body is lower than the stiffnesses k11, k12, k21, and k22 of the first to fourth elastic bodies.

### Claim 14 (depends on 1)

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.

### Claim 15 (depends on 1)

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.

### Claim 16 (depends on 1)

The damper device according to claim 1, wherein
when torque transmitted by the first elastic body is “T11”, torque transmitted by the second elastic body is “T12”, torque transmitted by the third elastic body is “T21”, and torque transmitted by the fourth elastic body is “T22”,
T11/(T11+T21)<T12/(T12+T22),
0.07≤T11/(T11+T21)≤0.28, and
0.12≤T12/(T12+T22)≤0.42
are satisfied.

### Claim 17 (depends on 1)

The damper device according to claim 1, wherein
when torque transmitted by the first elastic body is “T11”, torque transmitted by the second elastic body is “T12”, torque transmitted by the third elastic body is “T21”, and torque transmitted by the fourth elastic body is “T22”, and when torque transmitted by the fifth elastic body is “Tm”,
at least either one of 0<Tm/(T11+T21)≤0.35 and 0<Tm/(T12+T22)≤0.35 is satisfied.

### Claim 18 (depends on 1)

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.

### Claim 19 (depends on 18)

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.

### Claim 20 (depends on 19)

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.

### Claim 21 (depends on 20)

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

### Claim 22 (depends on 20)

The damper device according to claim 20, wherein
the frequency fa at the antiresonance point is represented by Formula (1):
fa
=
1
2
⁢
π
⁢
k
5
·
(
k
1
+
k
3
)
·
(
k
2
+
k
4
)
+
k
1
⁢
k
2
⁢
k
3
+
k
1
⁢
k
2
⁢
k
4
+
k
1
⁢
k
3
⁢
k
4
+
k
2
⁢
k
3
⁢
k
4
J
21
⁢
k
3
⁢
k
4
+
J
22
⁢
k
1
⁢
k
2
(
1
)
in Formula (1), “k1” is a combined spring constant of the first elastic body, “k2” is a combined spring constant of the second elastic body, “k3” is a combined spring constant of the third elastic body, “k4” is a combined spring constant of the fourth elastic body, “k5” is a combined spring constant of the fifth elastic body, “J21” is the moment of inertia of the first intermediate element, and “J22” is the moment of inertia of the second intermediate element.

### Claim 23 (depends on 19)

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”, the number of cylinders of the engine is “n”, and lockup rotational speed of a lockup clutch that couples the engine and the input element is “Nlup”,
Nlup≤(120/n)·fa
is satisfied.

### Claim 24 (depends on 1)

The damper device according to claim 1, 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.

### Claim 25 (depends on 24)

The damper device according to claim 24, further comprising:
a first stopper that restricts relative rotation between the first intermediate element and the output element;
a second stopper that restricts relative rotation between the second intermediate element and the output element; and
a third stopper that restricts relative rotation between the input element and the output element, wherein
the first and second stoppers restrict relative rotation between the first or second intermediate element and the output element when the input torque reaches the threshold, and the third stopper restricts relative rotation between the input element and the output element when the input torque reaches a second threshold that is higher than the threshold.

### Claim 26 (depends on 1)

The damper device according to claim 1, wherein
the input element has a contact portion being in contact with an end of the first elastic body and a contact portion being in contact with an end of the third elastic body,
the output element has a contact portion being in contact with an end of the second elastic body and a contact portion being in contact with an end of the fourth elastic body,
the first intermediate element has a contact portion being in contact with an end of the first elastic body, a contact portion being in contact with an end of the second elastic body, and a contact portion being in contact with an end of the fifth elastic body, and
the second intermediate element has a contact portion being in contact with an end of the third elastic body, a contact portion being in contact with an end of the fourth elastic body, and a contact portion being in contact with the end of the fifth elastic body.

### Claim 27 (depends on 1)

The damper device according to claim 1, wherein the first, second, third, and fourth elastic bodies are coil springs.

### Claim 28 (depends on 1)

The damper device according to claim 1, wherein the fifth elastic body is a coil spring.

### Claim 29 (depends on 1)

The damper device according to claim 1, wherein the output element is operatively coupled to an input shaft of a transmission.

### Claim 30 (depends on 29)

The damper device according to claim 29, wherein
to the input element, torque from the engine is transmitted via a lockup clutch, and
lockup rotational speed of the lockup clutch is higher than a rotational speed corresponding to a lower natural frequency of the natural frequencies of the first and second intermediate elements when torque is transmitted from the input element to the output element via all the first to fifth elastic bodies, and is lower than a rotational speed corresponding to the higher natural frequency of the natural frequencies of the first and second intermediate elements when torque is transmitted from the input element to the output element via all the first to fifth elastic bodies.