Torque rod and engine mounting system for using same

Patent metadata

Field	Value
Publication number	US-9689457-B2
Application number	US-201113818382-A
Country	US
Kind code	B2
Filing date	Aug 23, 2011
Priority date	Aug 23, 2010
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A torque rod ( 1 ) has two elastic bushes ( 2, 3 ) to be mounted respectively to a vibration-generating side and a vibration-receiving side, and a connecting rod ( 4 ) connecting the two elastic bushes ( 2, 3 ). The actively controlled vibration cancellation means ( 5 ) is an actuator including: the shaft ( 5 a ) having two opposite ends mounted to the connecting rod ( 4 ) and extending in an axial direction of the connecting rod ( 4 ), the mass member ( 5 b ) shaped in a tube to surround the shaft ( 5 a ); a coil ( 5 e ) and a winding core ( 5 f ) fixed to the shaft ( 5 a ) in the tube-shaped mass member ( 5 b ); a permanent magnet ( 5 d ) mounted to an inner peripheral surface of the tube-shaped mass member ( 5 b ) or the shaft ( 5 a ), and a connecting member ( 5 c ) for connecting at least one end of the tube-shaped mass members ( 5 b ) to the shaft ( 5 a ).

First claim

The invention claimed is:

1. A torque rod comprising two elastic bushes to be mounted respectively to a vibration-generating side and a vibration-receiving side, and a connecting rod connecting the two elastic bushes,
wherein an actively controlled vibration cancellation means configured to relatively displace a mass member from an originally arranged position toward the two elastic bushes around a shaft extending toward the two elastic bushes is provided in the connecting rod, and
the actively controlled vibration cancellation means comprises an actuator including: the shaft having two opposite ends, each end of the shaft being mounted to the connecting rod and extending in an axial direction of the connecting rod; the mass member shaped in a tube to surround the shaft and reciprocatively displaced to generate a vibration in a phase opposite of that of the input vibration from the vibration-generating side in the axial direction of the torque rod due to the active control; a coil and a winding core fixed to the shaft in the tube-shaped mass member; at least one permanent magnet mounted to an inner peripheral surface of the tube-shaped mass member or the shaft; and a connecting member for connecting at least one end of the tube-shaped mass member to the shaft.

2. The torque rod according to claim 1 , wherein the ends of the shaft of the vibration cancellation means are respectively mounted to opposing walls adjacent to the elastic bushes, and at least one end of the shaft is mounted to the connecting rod in a manner that allows a relative displacement in the central axial direction of the shaft with respect to the connecting rod.

3. The torque rod according to claim 2 , wherein the one end of the shaft of the vibration cancellation means relatively displaceable with respect to the connecting rod, in a posture in which the elastic bushes are respectively mounted to the vibration-generating side and the vibration-receiving side, is disposed at the vibration-generating side.

4. The torque rod according to claim 2 , wherein the one end of the shaft of the vibration cancellation means is disposed to insert into a hole formed on the adjacent wall of the connecting rod.

5. The torque rod according to claim 4 , wherein the other end of the shaft of the vibration cancellation means opposed to the relatively displaceable one end is press-fitted and fixed into the adjacent wall of the vibration-receiving side.

6. The torque rod according to claim 4 , wherein an elastic member is interposed between the one end of the shaft of the vibration cancellation means and the hole of the connecting rod.

7. The torque rod according to claim 1 , wherein the connecting rod has a gap at least between one of the elastic bushes and one of the ends of the shaft of the vibration cancellation means in the longitudinal direction of the shaft, the gap extending in a direction intersecting the central axial direction of the shaft and having a depth beyond an arranged level of the shaft.

8. The torque rod according to claim 7 , wherein two gaps are provided to separate the shaft of the vibration cancellation means from the two elastic bushes respectively in the longitudinal direction of the shaft.

9. The torque rod according to claim 7 , wherein the gap is filled with elastomeric material.

10. The torque rod according to claim 1 , further comprising a rod body having a rectangular cross-section in a plane perpendicular to an axis line connecting the elastic bushes fixed respectively to the vibration-generating side and the vibration-receiving side, and an actuator chamber with an opening at the short side of the rectangular cross-section,
wherein the actuator is installed through the opening into the actuator chamber and reciprocates the mass member along the shaft paralleled with the axis line to reduce the vibration transmitted to the rod body.

11. The torque rod according to claim 10 , wherein the mass member has a rectangular cross-section in a plane perpendicular to the shaft.

12. The torque rod according to claim 10 , wherein the actuator comprises: the shaft fixed to an inner wall of the actuator chamber, the winding core fixed to the shaft, the coil wound around the winding core, and the at least one permanent magnet disposed on an outer peripheral surface of the winding core,
wherein the mass member is adapted to have a higher density of mass at a portion facing to
the at least one permanent magnet than a density of mass at the remainder.

13. The torque rod according to claim 10 , wherein one of the elastic bushes has a smaller diameter than that of the other elastic bush, and
the opening of the actuator chamber is located outward from a tangent line passing through the base of the one elastic bush and touching an opening of the other elastic bush.

14. The torque rod according to claim 10 , wherein one of the elastic bushes has a smaller diameter than that of the other elastic bush, the one elastic bush has an opening toward the same direction as the actuator chamber, and the other elastic bush has an opening toward a direction perpendicularly to the actuator chamber.

15. The torque rod according to claim 10 , wherein one of the elastic bushes has a smaller diameter than that of the other elastic bush
the one and other elastic bushes have openings toward a direction perpendicularly to the actuator chamber, and
the torque rod further comprises a rib disposed at the base of the one elastic bush, and a screw hole for fixing a lid provided in an extension of the rib as viewed from the opening sides of the actuator chamber.

16. The torque rod according to claim 10 , wherein the torque rod is to be mounted to a vehicle so that the opening of the actuator chamber faces a hood.

17. The torque rod according to claim 1 , comprising: the elastic bushes mounted respectively to the vibration-generating side and the vibration-receiving side, the connecting rod connecting the elastic bushes, and the actuator installed in an actuator chamber formed inside of the connecting rod and reciprocating the mass member in the axial direction,
wherein the actuator chamber has an opening toward an outer surface of the connecting rod, and the opening is located in a region other than a space defined by connecting each of the elastic bushes.

18. An engine mount system for connecting an engine to a vehicle body side by means of the torque rod according to claim 1 ,
wherein the two elastic bushes have mutually different spring constants, the elastic bush with the smaller spring constant is mounted to an engine-side member, and the elastic bush with larger spring constant is mounted to a vehicle-side member.

19. The torque rod according to claim 1 , wherein the connecting member is elastically deformable to urge the mass member in the axial direction of the shaft.

20. The torque rod according to claim 1 , wherein the actuator is a linearly movable type actuator, and two pairs of the at least one permanent magnet adjacent to one another are mounted on the inner peripheral surface of the tube-shaped mass member such that the pairs of the at least one permanent magnet are oppositely spaced from the shaft with their polarities reversely oriented to each other.

21. The torque rod according to claim 1 , wherein the connecting member consistently connects the at least one end of the mass member to the shaft.

Assignees

• Kojima Hiroshi
• Sugimoto Yukihiro
• Ueki Akira
• Kurose Humiharu
• Sugiyama Takanobu
• Kimura Yoshiyasu
• Kondo Masahiko
• Satou Yuusuke
• Bridgestone Corp
• Nissan Motor

Inventors

• Kojima Hiroshi
• Sugimoto Yukihiro
• Ueki Akira
• Kurose Humiharu
• Sugiyama Takanobu
• Kimura Yoshiyasu
• Kondo Masahiko
• Satou Yuusuke

Classifications

• F16F1/3849

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

• F16F7/1011

  by electromagnetic means · CPC title

• F16F15/022 Primary

  using dampers and springs in combination · CPC title

• B60K5/1241 Primary

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

• B60K5/1216

  characterised by the location of the supports relative to the motor or to each other (B60K5/1225 takes precedence) · CPC title