Damper apparatus

A damper apparatus comprising:

• a first rotor;
• a second rotor relatively rotatable with respect to the first rotor;
• a spring connecting the first rotor and the second rotor elastically in a rotational direction;
• and
• a friction generation mechanism structured to generate frictional torque in response to relative rotation between the first rotor and the second rotor,
• wherein:
• the friction generation mechanism includes:
• a bush that has a substantially L-shaped cross section, and includes a back face being in contact with an annular friction surface of the second rotor;
• a retention plate that is a part of the first rotor, and faces the bush in an axial direction;
• and
• a cone spring that has an annular shape, and is disposed between the bush and the retention plate so as to be compressed, and biases the bush toward the annular friction surface of the second rotor;
• the bush includes a first load support surface being in contact with an inner periphery of the cone spring;
• the retention plate includes a second load support surface being in contact with an outer periphery of the cone spring;
• the first load support surface and the second load support surface face each other;
• the first load support surface and the second load support surface respectively include a first step part and a second step part that are retracted in the axial direction so as to respectively accept the outer periphery and the inner periphery of the cone spring in case that the cone spring is installed at a reversed orientation;
• and
• the first step part of the first load support surface has a boundary that is positioned outer in a radial direction, with respect to a boundary of the second step part of the second load support surface.

A damper apparatus comprising:

• a first rotor;
• a second rotor relatively rotatable with respect to the first rotor;
• a spring connecting the first rotor and the second rotor elastically in a rotational direction;
• and
• a friction generation mechanism structured to generate frictional torque in response to relative rotation between the first rotor and the second rotor,
• wherein:
• the friction generation mechanism includes:
• a bush that has a substantially L-shaped cross section, and includes a back face being in contact with an annular friction surface of the second rotor;
• a retention plate that is a part of the first rotor, and faces the bush in an axial direction;
• and
• a cone spring that has an annular shape, and is disposed between the bush and the retention plate so as to be compressed, and biases the bush toward the annular friction surface of the second rotor;
• the bush includes a first load support surface being in contact with an inner periphery of the cone spring;
• the retention plate includes a second load support surface being in contact with an outer periphery of the cone spring;
• the first load support surface and the second load support surface face each other;
• the first load support surface includes a first step part that is retracted in the axial direction so as to accept the outer periphery of the cone spring in case that the cone spring is installed at a reversed orientation;
• and
• the first step part of the first load support surface has a boundary that is positioned outer in a radial direction, with respect to an inner peripheral edge of the second load support surface being flat.

A damper apparatus comprising:

• a first rotor;
• a second rotor relatively rotatable with respect to the first rotor;
• a spring connecting the first rotor and the second rotor elastically in a rotational direction;
• and
• a friction generation mechanism structured to generate frictional torque in response to relative rotation between the first rotor and the second rotor,
• wherein:
• the friction generation mechanism includes:
• a bush that has a substantially L-shaped cross section, and includes a back face being in contact with an annular friction surface of the second rotor;
• a retention plate that is a part of the first rotor, and faces the bush in an axial direction;
• and
• a cone spring that has an annular shape, and is disposed between the bush and the retention plate so as to be compressed, and biases the bush toward the annular friction surface of the second rotor;
• the bush includes a first load support surface being in contact with an outer periphery of the cone spring;
• the retention plate includes a second load support surface being in contact with an inner periphery of the cone spring;
• the first load support surface and the second load support surface face each other;
• the first load support surface and the second load support surface respectively include a first step part and a second step part that are retracted in the axial direction so as to respectively accept the inner periphery and the outer periphery of the cone spring in case that the cone spring is installed at a reversed orientation;
• and
• the first step part of the first load support surface has a boundary that is positioned inner in a radial direction, with respect to a boundary of the second step part of the second load support surface.

A damper apparatus comprising:

• a first rotor;
• a second rotor relatively rotatable with respect to the first rotor;
• a spring connecting the first rotor and the second rotor elastically in a rotational direction;
• and
• a friction generation mechanism structured to generate frictional torque in response to relative rotation between the first rotor and the second rotor,
• wherein:
• the friction generation mechanism includes:
• a bush that has a substantially L-shaped cross section, and includes a back face being in contact with an annular friction surface of the second rotor;
• a retention plate that is a part of the first rotor, and faces the bush in an axial direction;
• and
• a cone spring that has an annular shape, and is disposed between the bush and the retention plate so as to be compressed, and biases the bush toward the annular friction surface of the second rotor;
• the bush includes a first load support surface being in contact with an outer periphery of the cone spring;
• the retention plate includes a second load support surface being in contact with an inner periphery of the cone spring;
• the first load support surface and the second load support surface face each other;
• the first load support surface includes a first step part that is retracted in the axial direction so as to accept the inner periphery of the cone spring in case that the cone spring is installed at a reversed orientation;
• and
• the first step part of the first load support surface has a boundary that is positioned in a radial direction within a radial range of the second load support surface being flat.