Vibration damper

Patent metadata

Field	Value
Publication number	US-9920812-B2
Application number	US-201515316659-A
Country	US
Kind code	B2
Filing date	Jun 9, 2015
Priority date	Jun 10, 2014
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

To prevent response delay and to damp torsional vibration transmitted to a power transmission route. A vibration damper includes a first route R 1 provided with a coil spring 43 as an elastic member, and a second route R 2 provided with a sun gear 5 s as an inertial body formed to be parallel as power transmission routes between an engine 10 to a transmission 20 , and by switching the first route R 1 and the second route R 2 by a first clutch C 1 and a second clutch C 2 , switchover to a state in which an inertial torque acts on the power transmission route by the sun gear 5 s and a state in which the inertial torque is not generated is carried out.

First claim

The invention claimed is:

1. A vibration damper which includes a damper mechanism having an elastic member that is expanded and compressed by a pulsation of a torque transmitted between an input shaft to which the torque is inputted and an output shaft, and an inertial body that is allowed to be rotated freely by the pulsation of the torque and that generates an inertial torque in a direction of suppressing the pulsation of torque when a rotational speed is changed, comprising:
a first route which transmits the torque between the input shaft and the output shaft via the damper mechanism;
a second route which transmits the torque between the input shaft and the output shaft while bypassing the damper mechanism; and
a switching mechanism which switches a torque transmission route between the input shaft and the output shaft to any one of the first route and the second route,
wherein the switching mechanism allows the inertial body to rotate freely in a case that the torque transmitting route between the input shaft and the output shaft is switched to the first route, and connects the inertial member to a member to which a torque is applied in a case that the torque transmitting route between the input shaft and the output shaft is switched to the second route so as to transmit the torque through the second route.

2. The vibration damper according to claim 1 , further comprising:
a planetary mechanism adapted to perform a differential action among a plurality of rotary elements, wherein
the planetary mechanism comprises a first rotary element to which the torque is transmitted from the input shaft, a second rotary element which is rotated integrally with the output shaft, and a third rotary element which serves as the inertial body,
the damper mechanism is disposed between the first rotary element and the second rotary element to transmit the torque therebetween, and
the switching mechanism comprises a first clutch mechanism which is disposed in series with respect to the damper mechanism between the first rotary element and the second rotary element, and a second clutch mechanism which connects the third rotary element to one of the first rotary element and the second rotary element.

3. The vibration damper according to claim 1 , further comprising:
a planetary mechanism adapted to perform a differential action among a plurality of rotary elements, wherein
the planetary mechanism comprises a first rotary element to which the torque is transmitted from the input shaft, a second rotary element which rotates integrally with the output shaft, and a third rotary element which serves as the inertial body,
the member to which the torque is applied includes a fixed portion to which the torque is applied from the third rotary element to exert a reaction torque to the third rotary element, and
the switching mechanism comprises a first clutch mechanism which is disposed in series with respect to the damper mechanism between the first rotary element and the second rotary element, and a second clutch mechanism which connects the third rotary element to one of the first rotary element and the second rotary element.

4. The vibration damper according to claim 1 , further comprising:
a spring damper mechanism which is disposed between an engine and the input shaft, or on the output shaft; and
a controller which carries out a switching operation of the switching mechanism,
wherein the controller is configured to
compare a speed of the engine with a predetermined criterion speed, and
switch the switching mechanism to transmit the torque from the input shaft to the output shaft through the first route in a case that the speed of the engine is lower than the predetermined speed.

5. The vibration damper according to claim 4 , wherein the controller is further configured to switch the switching mechanism to transmit the torque from the input shaft to the output shaft through the second route in a case that the speed of the engine is equal to or higher than the predetermined speed.

6. The vibration damper according to claim 1 , further comprising:
a spring damper mechanism which is disposed between an engine and the input shaft or on the output shaft; and
a controller which carries out a switching operation of the switching mechanism,
wherein the controller is configured to
compare a speed of the engine with a predetermined criterion speed, and
switch the switching mechanism to transmit the torque from the input shaft to the output shaft through the second route in a case that the speed of the engine is equal to or higher than the predetermined speed.

7. The vibration damper according to claim 2 , further comprising:
a spring damper mechanism which is disposed between an engine and the input shaft, or on the output shaft; and
a controller which carries out a switching operation of the switching mechanism,
wherein the controller is configured to
compare a speed of the engine with a predetermined criterion speed, and
switch the switching mechanism to transmit the torque from the input shaft to the output shaft through the first route in a case that the speed of the engine is lower than the predetermined speed.

8. The vibration damper according to claim 3 , further comprising:
a spring damper mechanism which is disposed between an engine and the input shaft, or on the output shaft; and
a controller which carries out a switching operation of the switching mechanism,
wherein the controller is configured to
compare a speed of the engine with a predetermined criterion speed, and
switch the switching mechanism to transmit the torque from the input shaft to the output shaft through the first route in a case that the speed of the engine is lower than the predetermined speed.

9. The vibration damper according to claim 7 , wherein the controller is further configured to switch the switching mechanism to transmit the torque from the input shaft to the output shaft through the second route in a case that the speed of the engine is equal to or higher than the predetermined speed.

10. The vibration damper according to claim 8 , wherein the controller is further configured to switch the switching mechanism to transmit the torque from the input shaft to the output shaft through the second route in a case that the speed of the engine is equal to or higher than the predetermined speed.

11. The vibration damper according to claim 2 , further comprising:
a spring damper mechanism which is disposed between an engine and the input shaft or on the output shaft; and
a controller which carries out a switching operation of the switching mechanism,
wherein the controller is configured to
compare a speed of the engine with a predetermined criterion speed, and
switch the switching mechanism to transmit the torque from the input shaft to the output shaft through the second route in a case that the speed of the engine is equal to or higher than the predetermined speed.

12. The vibration damper according to claim 3 , further comprising:
a spring damper mechanism which is disposed between an engine and the input shaft or on the output shaft; and
a controller which carries out a switching operation of the switching mechanism,
wherein the controller is configured to
compare a speed of the engine with a predetermined criterion speed, and
switch the switching mechanism to transmit the torque from the input shaft to the output shaft through the second route in a case that the speed of the engine is equal to or higher than the predetermined speed.

Assignees

• Toyota Motor Co Ltd

Inventors

• Sekiguchi Tadashi
• Kishimoto Naoyuki
• Tsukano Fusahiro
• Honda Atsushi

Classifications

• F16F15/1206 Primary

  with a planetary gear system · CPC title

• F16H1/28

  with gears having orbital motion · CPC title

• F16F15/1478

  with a planetary gear system · CPC title