Torque rod

Patent metadata

Field	Value
Publication number	US-9611916-B2
Application number	US-201314646060-A
Country	US
Kind code	B2
Filing date	Nov 26, 2013
Priority date	Nov 27, 2012
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

A second inner member and a second insulator are provided in a second ring-shaped member forming a torque rod. A first bore section and a second bore section are provided in front of and in the rear of the second inner member. The insulator has an elastic arm section extending in the direction of a Y axis. A spring adjustment recess extends in a slit shape in the direction of an X axis from an end of the first bore section. The spring adjustment recess forms an unrestricted part of the elastic arm section by the second ring-shaped member, whereby the Z spring in the axial direction of the inner member is lowered, and the XZ spring ratio can be changed greatly while maintaining the size of the X spring in the main vibration inputting direction.

First claim

What is claimed is:

1. A torque rod comprising:
a rod main body of a long member,
a small round section and a large round section which form a pair of vibration isolating connecting sections different in size, being provided in each end in the longitudinal direction of the rod main body,
at least the large round section of the vibration isolating connecting sections including a ring-shaped member provided in the rod main body, an inner member arranged in a center portion of the ring-shaped member, and an insulator of an elastic body elastically connecting the inner member and the ring-shaped member,
wherein, a center axis of the inner member is a Z axis, a main vibration inputting axis orthogonal to the Z axis is an X axis, and an axis orthogonal to these Z axis and X axis is a Y axis,
wherein the insulator extends from the inner member to both sides of the X axis and includes
an elastic arm section, each extending end of which is joined to, and restricted in the Y axis by the ring-shaped member, and
a spring adjustment recess provided in a part of a joint portion of the elastic arm section relative to the ring-shaped member, and separating a part of the elastic arm section from the ring-shaped member so as to provide an unrestricted region on the elastic arm section that is separated from and not restricted by the ring-shaped member, and

wherein the insulator has a spring value of Ex in the X axis, a spring value of Ey in the Y axis, and a spring value of Ez in the Z axis, all of which are affected by the depth and width of the spring adjustment recess,
wherein the insulator has a XZ spring ratio of Ez/Ex, which may be reduced by including the spring adjustment recess in comparison to not including the spring adjustment recess, in order to adjust a frequency of the rigid body resonance in the direction of the Z axis in such a way as to be offset from the high sensitive frequency on a vehicle body side.

2. The torque rod according to claim 1 , wherein the spring adjustment recess is located in an outward position in the direction of the Y axis in relation to a spring region of the elastic arm section, the spring region functioning as a main body of spring action when a main vibration has been inputted.

3. The torque rod according to claim 1 , wherein the insulator includes a first bore section and a second bore section which are located in either side of the inner member in the direction of the X axis, wherein the first bore section and the second bore section pass through the insulator in the direction of the Z axis and extend on either side of the X axis across the elastic arm section, and the spring adjustment recess is formed in such a way as to extend from the first bore section or the second bore section in the direction of the X axis.

4. The torque rod according to claim 3 ,
wherein, when a tangential line of the inner member in parallel with the X axis is L 1 and a straight line extending in parallel with the tangential line and passing an end portion of the second bore section in the direction of the Y axis and a connecting section with the ring-shaped member is L 2 , a region of the elastic arm section located between the tangential line L 1 and the straight line L 2 is the spring region, which functions as the main body of the spring action when a main vibration has been inputted, and
wherein the spring adjustment recess is provided in an outward position of the spring region in the direction of the Y axis.

5. The torque rod according to claim 1 , wherein the spring adjustment recess is formed in a slit shape.

6. The torque rod according to claim 1 , wherein the rod main body and the ring-shaped member are integrally formed of non-metal having a specific gravity of 2.7 or less.

7. The torque rod according to claim 2 , wherein the insulator includes a first bore section and a second bore section which are located in either side of the inner member in the direction of the X axis, wherein the first bore section and the second bore section pass through the insulator in the direction of the Z axis and extend on either side of the X axis across the elastic arm section, and the spring adjustment recess is formed in such a way as to extend from the first bore section or the second bore section in the direction of the X axis.

8. The torque rod according to claim 7 , wherein, when a tangential line of the inner member in parallel with the X axis is L 1 and a straight line extending in parallel with the tangential line and passing an end portion of the second bore section in the direction of the Y axis and a connecting section with the ring-shaped member is L 2 , the spring region of the elastic arm section is located between the tangential line L 1 and the straight line L 2 .

9. The torque rod according to claim 1 , wherein the spring adjustment recess is formed of a groove.

10. The torque rod according to claim 1 , wherein the spring adjustment recess is formed in the shape of a through bore in an intermediate position of the joint portion of the elastic arm section.

11. The torque rod according to claim 1 , wherein the XZ spring ratio of Ez/Ex is 0.35 to 0.36.

Assignees

• Yamashita Rubber Kk

Inventors

• Shimada Hitoshi

Classifications

• F16F15/085 Primary

  Use of both rubber and metal springs · CPC title

• F16F3/10

  combined with springs made of steel or other material having low internal friction · CPC title

• F16F1/3849 Primary

  Mounting brackets therefor, e.g. stamped steel brackets; Restraining links · CPC title

• F16F1/3873

  having holes or openings · CPC title

• B60K5/1241

  Link-type support (B60K5/125, B60K5/1275 take precedence) · CPC title