Damper disk assembly

Patent metadata

Field	Value
Publication number	US-9964158-B2
Application number	US-201414914743-A
Country	US
Kind code	B2
Filing date	Aug 29, 2014
Priority date	Sep 3, 2013
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A damper disc assembly includes first and second input plates, an output unit, a high stiffness damper unit, and first and second low stiffness damper units. The output unit includes an input-side member and an output-side member disposed rotatably relative to each other. The high stiffness damper unit elastically couples the input-side member and the first and second input plates in a rotational direction and is actuated in a high torsion angular range of torsional characteristics. The first and second low stiffness damper units elastically couple the input-side member and the output-side member and are actuated in a low torsion angular range of the torsional characteristics. The second low stiffness damper unit is actuated later than actuation of the first low stiffness damper unit.

First claim

The invention claimed is:

1. A damper disc assembly for attenuating variation in torque inputted thereto from an engine and for transmitting the torque toward a transmission, comprising:
first and second input plates to which the torque is inputted from the engine, the first and second input plates disposed axially in opposition to each other, the first and second input plates fixed to each other;
an output unit including an input-side member and an output-side member, the input-side member and the output-side member disposed rotatably relative to the first and second input plates, the input-side member and the output-side member disposed rotatably relative to each other, the input-side member disposed axially between the first and second input plates, the output-side member coupleable to the transmission;
a high stiffness damper unit elastically coupling the input-side member and the first and second input plates in a rotational direction, the high stiffness damper unit configured to be actuated in a high torsion angular range of torsional characteristics;
a first low stiffness damper unit elastically coupling the input-side member and the output-side member in the rotational direction, the first low stiffness damper unit disposed axially between the first input plate and the input-side member on an inner peripheral side of the high stiffness damper unit, the first low stiffness damper unit configured to be actuated in a low torsion angular range of the torsional characteristics, the first low stiffness damper unit having a lower stiffness than the high stiffness damper unit;
a second low stiffness damper unit elastically coupling the input-side member and the output-side member in the rotational direction, the second low stiffness damper unit disposed axially between the second input plate and the input-side member on the inner peripheral side of the high stiffness damper unit, the second low stiffness damper unit configured to be actuated later than actuation of the first low stiffness damper unit in the low torsion angular range of the torsional characteristics, the second low stiffness damper unit having a lower stiffness than the high stiffness damper unit; and
a first hysteresis torque generating mechanism configured to generate a first hysteresis torque in an actuation range of the first low stiffness damper unit.

2. The damper disc assembly recited in claim 1 , wherein
the output-side member is a hub coupleable to the transmission, and
the input-side member is a flange radially extending on an outer peripheral side of the hub, the flange rotatable relatively to the hub within a predetermined angular range.

3. The damper disc assembly recited in claim 2 , wherein
the each of the first and second low stiffness damper units includes
a pair of holder plates engaged with the flange whereby the torque is inputted thereto from the flange,
a drive plate disposed axially between the pair of holder plates, the drive plate engaged with the hub whereby the torque is outputted therefrom to the hub, and
an elastic member elastically coupling the drive plate and the pair of holder plates in the rotational direction.

4. The damper disc assembly recited in claim 1 , further comprising:
a second hysteresis torque generating mechanism configured to generate a second hysteresis torque higher than the first hysteresis torque in a higher torsion angular part of an actuation range of the second low stiffness damper unit, wherein the first hysteresis torque generating mechanism is further configured to generate the first hysteresis torque in a lower torsion angular part of the actuation range of the second low stiffness damper unit.

5. The damper disc assembly recited in claim 4 , wherein the second hysteresis torque generating mechanism is further configured to generate the second hysteresis torque in the actuation range of the high stiffness damper unit.

6. The damper disc assembly recited in claim 4 , further comprising:
an intermediate hysteresis torque generating mechanism configured to generate an intermediate hysteresis torque in the lower torsion angular part of the actuation range of the second low stiffness damper unit, the intermediate hysteresis torque higher than the first hysteresis torque and lower than the second hysteresis torque.

Assignees

• Exedy Corp

Inventors

• Kubota Yoshitaka
• Hashimoto Kazuki
• Matsumura Ryota

Classifications

• F16D3/12 Primary

  specially adapted for accumulation of energy to absorb shocks or vibration (by making use of fluid elements F16D3/80) · CPC title

• F16D13/64 Primary

  Clutch-plates; Clutch-lamellae (brake-plates, brake-lamellae F16D65/12) · CPC title

• F16D2300/22

  Vibration damping · CPC title

• F16F15/134

  Wound springs {(F16F15/1333, F16F15/1337, F16F15/137 take precedence)} · CPC title

• F16F15/12346

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