Vibration isolating device

Patent metadata

Field	Value
Publication number	US-9470289-B2
Application number	US-201314419776-A
Country	US
Kind code	B2
Filing date	Aug 10, 2013
Priority date	Aug 11, 2012
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A torque rod includes a rod main body, a first bushing and a second bushing. The rod main body is made of resin and provided integral with a first ring section and a second ring section on each end of an arm section. A first rib extends from the arm section to a front lateral surface of the second ring section. In a plan view, a second rib is provided to overlap with the first rib. The first rib projects forwardly of and in the left and right directions of the second rib. This projecting portion forms an enlarged diameter portion. Due to this enlarged diameter portion, an area of the first rib is made larger than an area of the second rib thereby to increase a rigidity of a forward side of the second ring.

First claim

What is claimed is:

1. A vibration isolating device comprising:
a main body including an arm section, a first ring section, and a second ring section, said first and second ring sections being each located on a respective end in a longitudinal direction of the arm section;
a first bushing being provided in the first ring section;
a second bushing being provided in the second ring section; and
a plurality of horizontal ribs that extend in a plane orthogonal to a center axis of the second bushing, being formed on an outer periphery of at least the second ring section of the ring sections in a direction of the center axis of the second bushing;
wherein the second ring section has a front side portion, which is connected to the arm section on a forward side with respect to the center axis of the second busing, and a rear side portion located on an opposite side; and
wherein, in a plan view, the horizontal ribs are placed in an upwardly and downwardly overlapping relationship with each other and include a first rib and a second rib, which are different in area, wherein the first rib of a larger area has an enlarged diameter portion extending outwardly of the second rib of a smaller area and connecting the arm section and the second ring section, and the second rib is provided to extend from the front side portion to the rear side portion; and wherein the first rib extends from the arm section to only an outer periphery of the front side portion.

2. The vibration isolating device according to claim 1 , wherein, letting a minimum distance of a center distance between an outer periphery of the first rib and a center of the bushing be 1, a center distance between an outer periphery of the enlarged diameter portion and the center is not less than 1.

3. The vibration isolating device according to claim 2 , wherein the first rib, the second rib and another third horizontal rib are provided on the outer periphery of the ring section, and recesses are formed along each of the horizontal ribs, and wherein a depth of the recess extending along the enlarged diameter portion of the first rib is greater than a depth of the recess extending along the third rib.

4. The vibration isolating device according to claim 3 , wherein, in a front view, a plurality of ribs including the first rib are provided in the front side portion, and a plurality of ribs including the third rib different from the first rib and the second rib are provided in the rear side portion, and wherein the number of ribs provided in the front side portion is different from the number of ribs provided in the rear side portion.

5. The vibration isolating device according to claim 4 , wherein the horizontal ribs of the front side portion and the rear side portion are continuously formed integral with each other by a vertical rib which is formed long in the axial direction of the bushing on an outer peripheral surface of the one of the ring sections.

6. The vibration isolating device according to claim 5 , wherein the second rib is formed in an annular shape on an end portion in an axial direction of the one of the ring sections, and the second rib is located outwardly in the axial direction with respect to the first rib.

7. The vibration isolating device according to claim 6 , wherein the second rib is connected obliquely through a fourth rib to the first rib.

8. The vibration isolating device according to claim 7 , wherein, in a plan view, an outer peripheral portion of the enlarged diameter portion of the first rib and an edge portion in a left and right direction of the fourth rib have a curved portion, respectively, and wherein a radius of the curved portion of the first rib is greater than a radius of the curved portion of the fourth rib.

9. The vibration isolating device according to claim 8 , further comprising lightening recesses which are formed between the first rib and each of the second rib and the fourth rib.

10. The vibration isolating device according to claim 7 , further comprising lightening recesses which are formed between the first rib and each of the second rib and the fourth rib.

11. The vibration isolating device according to claim 1 , wherein the first rib, the second rib and another third horizontal rib are provided on the outer periphery of the ring section, and the third rib is provided only in the rear side portion.

12. The vibration isolating device according to claim 11 , wherein, in a front view, a plurality of horizontal ribs including the first rib are provided in the front side portion, and a plurality of horizontal ribs including the second rib second rib and the third rib are provided in the rear side portion, and wherein the number of horizontal ribs provided in the front side portion is larger than the number of horizontal ribs provided in the rear side portion.

13. The vibration isolating device according to claim 12 , wherein all of the horizontal ribs of the front side portion and the rear side portion are continuously formed integral with each other by a vertical rib, which is formed long in the axial direction on an outer peripheral surface of the second ring section.

14. The vibration isolating device according to claim 13 , wherein the second rib is formed in an annular shape on an end portion in an axial direction of the second ring section, and the second rib is located outwardly in the axial direction with respect to the first rib.

15. The vibration isolating device according to claim 14 , wherein the second rib is connected obliquely through a fourth rib to the first rib.

16. The vibration isolating device according to claim 15 , wherein, in a plan view, an outer peripheral portion of the enlarged diameter portion of the first rib and an edge portion in a left and right direction of the fourth rib have a curved portion, respectively, and wherein a radius of the curved portion of the first rib is greater than a radius of the curved portion of the fourth rib.

17. The vibration isolating device according to claim 16 , further comprising lightening recesses which are formed between the first rib and each of the second rib and the fourth rib.

18. The vibration isolating device according to claim 15 , further comprising lightening recesses which are formed between the first rib, and each of the second rib and the fourth rib.

19. The vibration isolating device according to claim 11 , further comprising recesses that are formed along each of the first rib, the second rib, and the third rib, and wherein depths of the recesses extending along the enlarged diameter portion of the first rib are greater than a depth of the recess extending along the third rib.

Assignees

• Yamashita Rubber Kk

Inventors

• Shimada Hitoshi

Classifications

• F16F15/08 Primary

  with rubber springs {(grommet- or bushing-type resilient mountings F16F1/3732, F16F1/38); with springs made of rubber and metal (arrangement of internal-combustion or jet-propulsion units B60K5/12; mounting of propulsion plants on vessels B63H21/30; mounting of vehicle drivers' cabs B62D33/0604)} · CPC title

• B60K5/1208

  Resilient supports (B60K5/1241 - B60K5/1291 take precedence) · CPC title

• B60K5/1241

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

• F16F1/3849 Primary

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