Damper device

Abstract

A rotary inertia mass damper of a damper device is configured to include a planetary gear that includes a driven member with outer teeth, first and second input plate member as a carrier which rotatably supports a plurality of pinion gears, and a ring gear that meshes with the plurality of pinion gears and works as the mass body. The outer teeth of the driven member are arranged to be disposed outside first and second springs in a radial direction of the damper device. The driven member, the plurality of pinion gears and the ring gear are arranged to at least partially overlap with the first and second springs as viewed in the radial direction. A motion of the ring gear in the axial direction is restricted by the plurality of pinion gears.

1 . A damper device configured to include a plurality of rotational elements including an input element to which a torque from an engine is transmitted and an output element, a plurality of elastic bodies respectively arranged to transmit a torque between the input element and the output element, and a rotary inertia mass damper with a mass body that oscillates in accordance with relative rotation between a first rotational element which is one of the plurality of rotational elements and a second rotational element different from the first rotational element, the damper device comprising:
 a plurality of inner elastic bodies configured to work in parallel to the plurality of elastic bodies when the torque transmitted between the input element and the output element is equal to or larger than a predetermined value,   wherein the plurality of elastic bodies are arranged to be disposed inside the mass body of the rotary inertia mass damper in a radial direction of the rotational elements, and   wherein the plurality of inner elastic bodies are arranged to be disposed inside the plurality of elastic bodies in the radial direction.   
     
     
         2 . The damper device according to  claim 1 ,
 wherein the rotary inertia mass damper is configured to include a planetary gear that includes a sun gear, a plurality of pinion gears, a carrier that rotatably supports the plurality of pinion gears, and a ring gear that meshes with the plurality of pinion gears, and   wherein the sun gear, the plurality of pinion gears and the ring gear are arranged to at least partially overlap with the plurality of elastic bodies and the plurality of inner elastic bodies in an axial direction.   
     
     
         3 . The damper device according to  claim 2 ,
 wherein the ring gear works as the mass body,   wherein one of the first and second rotational elements is configured to include two plate members arranged to be opposed to each other in an axial direction such as to support the plurality of elastic bodies, the two plate members rotatably supporting the plurality of pinion gears such as to work as the carrier, and   wherein the two plate members are coupled with each other by means of a plurality of rivets arranged adjacent to the pinion gear in a circumferential direction on an outer side of the plurality of elastic bodies in the radial direction.   
     
     
         4 . The damper device according to  claim 3 ,
 wherein the one of the first and second rotational elements is the input element and the other of the first and second rotational elements is the output element that rotates integrally with the sun gear.   
     
     
         5 . The damper device according to  claim 4 ,
 wherein the output element is a single output plate member disposed between the two plate members in the axial direction, the output plate member including outer teeth in an outer circumference thereof such as to work as the sun gear.   
     
     
         6 . The damper device according to  claim 5 ,
 wherein the output plate member is configured to include the outer teeth formed in the outer circumference, a plurality of outer accommodating windows in which the corresponding elastic body is disposed, and a plurality of inner accommodating windows in which the corresponding inner elastic body is disposed, the plurality of inner accommodating windows arranged inside the plurality of outer accommodating windows in the radial direction, and   wherein each of the plate members is configured to include a plurality of outer accommodating windows in which the corresponding elastic body is disposed, the plurality of outer accommodating windows arranged at intervals in the circumferential direction, a plurality of pinion gear supporting portions that respectively supporting one end of a pinion shaft that is inserted into the pinion gear, and a plurality of inner accommodating windows in which the corresponding inner elastic body is disposed, and the plurality of inner accommodating windows arranged inside the plurality of outer accommodating windows in the radial direction and respectively having a circumferential length longer than a length of the inner elastic body.   
     
     
         7 . The damper device according to  claim 1 ,
 wherein the plurality of rotational elements includes an intermediate element, and   wherein the plurality of elastic bodies include a plurality of first elastic bodies arranged to transmit a torque between the input element and the intermediate element, and a plurality of second elastic bodies arranged to transmit a torque between the intermediate element and the output element.   
     
     
         8 . The damper device according to  claim 1 ,
 wherein the output element is operatively connected to an input shaft of a transmission.