Active damper upper mount

Patent metadata

Field	Value
Publication number	US-11358428-B2
Application number	US-201816646373-A
Country	US
Kind code	B2
Filing date	Oct 10, 2018
Priority date	Oct 10, 2017
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

The active damper upper mount includes an inner member ( 11, 111 ) to which an upper end portion of a rod ( 22, 122 ) of an active damper ( 21, 121 ) is fixed, an intermediate member ( 12, 112 ) that surrounds the inner member in a circumferential direction around a rod axis (O 1 , O 2 ), an outer member ( 13, 113 ) that surrounds the intermediate member in the circumferential direction and is attached to a vehicle body side, a first elastic body ( 14, 114 ) that is disposed between the inner member and the intermediate member and supports the inner member and the intermediate member so as to be elastically displaceable relative to each other, and a second elastic body ( 15, 115 ) that is disposed between the intermediate member and the outer member and supports the intermediate member and the outer member so as to be elastically displaceable relative to each other.

First claim

The invention claimed is:

1. An active damper upper mount comprising:
an inner member to which an upper end portion of a rod of an active damper is fixed;
an intermediate member that surrounds the inner member in a circumferential direction around a rod axis;
an outer member that surrounds the intermediate member in the circumferential direction and is attached to a vehicle body side;
a first elastic body that is disposed between the inner member and the intermediate member and supports the inner member and the intermediate member so as to be elastically displaceable relative to each other; and
a second elastic body that is disposed between the intermediate member and the outer member and supports the intermediate member and the outer member so as to be elastically displaceable relative to each other,
wherein the intermediate member includes a body tube in which the inner member is disposed, and an annular support plate that protrudes outward in a radial direction from an outer peripheral surface of the body tube,
wherein the second elastic body is formed in a tubular shape having a length in a direction of the rod axis larger than a thickness thereof in the radial direction, and is externally fitted to the body tube so as to be slidable in the direction of the rod axis,
wherein a plurality of annular projections, which extend in the circumferential direction, are formed on an outer peripheral surface of the second elastic body at intervals in the direction of the rod axis,
wherein a lower end opening edge of the second elastic body is supported on an upper surface of the support plate in a state where the upper end portion of the rod is fixed to the inner member and the outer member is attached to the vehicle body side,
wherein the length of the second elastic body in the direction of the rod axis is larger than a size of the first elastic body in the direction of the rod axis, and the lower end opening edge of the second elastic body is located below the first elastic body, and
wherein lubricant is disposed between an inner peripheral surface of the second elastic body and an outer peripheral surface of the body tube.

2. The active damper upper mount according to claim 1 ,
wherein the body tube is press-fitted into the second elastic body.

3. The active damper upper mount according to claim 1 ,
wherein an annular groove into which a lower end portion of the second elastic body is inserted is formed in the upper surface of the support plate, and
wherein a gap in the radial direction is provided between an outer peripheral surface of an internal surface of the annular groove that faces inward in the radial direction and the outer peripheral surface of the second elastic body.

4. The active damper upper mount according to claim 1 ,
wherein the support plate and the outer member face each other in the direction of the rod axis, and a stopper rubber is disposed in at least one of the support plate and the outer member.

5. An active damper upper mount comprising:
an inner member to which an upper end portion of a rod of an active damper is fixed;
an intermediate member that surrounds the inner member in a circumferential direction around a rod axis;
an outer member that surrounds the intermediate member in the circumferential direction and is attached to a vehicle body side;
a first elastic body that is disposed between the inner member and the intermediate member and supports the inner member and the intermediate member so as to be elastically displaceable relative to each other; and
a second elastic body that is disposed between the intermediate member and the outer member and supports the intermediate member and the outer member so as to be elastically displaceable relative to each other,
wherein the intermediate member includes a body tube in which the inner member is disposed and which extends in a direction of the rod axis, and an annular support plate that protrudes outward in a radial direction from an outer peripheral surface of the body tube,
wherein the second elastic body is formed in a tubular shape having a length in the direction of the rod axis larger than a thickness thereof in the radial direction, and is externally fitted to the body tube so as to be slidable in the direction of the rod axis,
wherein a lower end opening edge of the second elastic body is supported on an upper surface of the support plate in a state where the upper end portion of the rod is fixed to the inner member and the outer member is attached to the vehicle body side,
wherein lubricant is disposed between an inner peripheral surface of the second elastic body and the outer peripheral surface of the body tube, and
wherein the outer member includes a surrounding tube which extends in the direction of the rod axis and surrounds the body tube from the outside in the radial direction, and to which the second elastic body bonded, and an annular mounting part that protrudes outward in the radial direction from the surrounding tube, faces the support plate in the direction of the rod axis, and is attached to the vehicle body side.

6. The active damper upper mount according to claim 5 ,
wherein a plurality of annular projections, which extend in the circumferential direction, are formed on an outer peripheral surface of the second elastic body at intervals in the direction of the rod axis.

7. The active damper upper mount according to claim 5 ,
wherein the length of the second elastic body in the direction of the rod axis is larger than a size of the first elastic body in the direction of the rod axis, and the lower end opening edge of the second elastic body is located below the first elastic body.

8. The active damper upper mount according to claim 5 ,
wherein the body tube is press-fitted into the second elastic body.

9. The active damper upper mount according to claim 5 ,
wherein an annular groove into which a lower end portion of the second elastic body is inserted is formed in the upper surface of the support plate, and
wherein a gap in the radial direction is provided between an outer peripheral surface of an internal surface of the annular groove that faces inward in the radial direction and an outer peripheral surface of the second elastic body.

10. The active damper upper mount according to claim 5 ,
wherein a stopper rubber is disposed in at least one of the support plate and the mounting part.

11. An active damper upper mount comprising:
an inner member to which an upper end portion of a rod of an active damper is fixed;
an intermediate member that surrounds the inner member in a circumferential direction around a rod axis;
an outer member that surrounds the intermediate member in the circumferential direction and is attached to a vehicle body side;
a first elastic body that is disposed between the inner member and the intermediate member and supports the inner member and the intermediate member so as to be elastically displaceable relative to each other; and
a second elastic body that is disposed between the intermediate member and the outer member and supports the intermediate member and the outer member so as to be elastically displaceable relative to each other,
wherein the intermediate member includes a body tube in which the inner member is disposed, and an annular support plate that protrudes outward in a radial direction from an outer peripheral surface of the body tube,
wherein the second elastic body is formed in a tubular shape having a length in a direction of the rod axis larger than a thickness thereof in the radial direction, and is externally fitted to the body tube so as to be slidable in the direction of the rod axis,
wherein a plurality

Assignees

• Bridgestone Corp

Inventors

• Otsu Kazutaka
• Tsuji Syogo

Classifications

• B60G2800/162

  Reducing road induced vibrations · CPC title

• B60G2204/41

  Elastic mounts, e.g. bushings · CPC title

• B60G13/003 Primary

  characterised by the mounting on the vehicle body or chassis of the damper unit · CPC title

• B60G2202/413

  Hydraulic actuator · CPC title

• B60G2204/128

  Damper mount on vehicle body or chassis · CPC title