JP2000065138A - Suspendible supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the rise of a spring constant in a high-frequency region, also realize light weight and cost reduction. SOLUTION: This device is equipped with a first holding part 1: having a first through hole 1A thereto one side is inserted to be fitted, a second holding part 2: having a second through hole 2A provided at an interval to the holding part 1, and another side is inserted to be fitted, and a pair of side parts 3 and 4: for connecting these holding parts 1 and 2 on both sides; and the whole is formed of rubberlike elastic material. In this case, the axial directional thickness of the side parts 3 and 4 is thined, to make the cross section area in the side parts 3 and 4 smaller than that of the boundary place between the holding parts 1 and 2 and the side parts 3 and 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension support device called a muffler hanger for suspending and supporting vibration generated in an exhaust pipe of an automobile or the like.

[0002]

2. Description of the Related Art As a conventional muffler hanger, a first holding portion having a first through hole into which a supporting portion on the vehicle body side is inserted, and a supporting portion on the exhaust system member side provided at a distance from the first holding portion. It has a second holding portion having a second through hole into which the portion is inserted, and a pair of side portions connecting the first and second holding portions on both sides thereof. Have been.

A conventional suspension support device made of an elastic material such as rubber has a first through hole 1 as shown in FIGS.
A first holding portion 100 (shown by cross-hatching) having the first holding portion 100A and a second holding portion 101 (shown by cross-hatching) having a second through-hole 101A provided at a distance from the first holding portion 100; And the second holding unit 100, 1
01 and a pair of side portions 102 and 103 connecting both sides thereof.
, A central hole 104 is provided at the center, and the whole is formed from an elastic material such as rubber. Such a suspension support device absorbs vibration transmitted from an exhaust system member and vibration transmitted from a vehicle body by the operation of an automobile engine.
Further, in this conventional example, the axial thickness b of the side portions 102 and 103 is
Are formed to be the same as the axial thickness of the first and second holding portions 100 and 101, and the width a of the side portions 102 and 103 in the width direction is
Are also formed relatively thick.

[0004]

In the conventional hanging support device, the volume and mass of the pair of side portions 102 and 103 are large.
It becomes a mass in a high frequency range, and the spring constant increases due to resonance. For example, the thing shown in FIG. 6 is used as a muffler hanger, and the support part on the vehicle body side is inserted into the first through hole 100A, and the support part on the exhaust pipe side is inserted into the second through hole 101A. When the thickness b in the axial direction is 55 mm and the thickness b in the axial direction is 30 mm, a graph shown by a broken line in FIG. 3 is obtained, and the spring constant sharply increases at about 500 Hz.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a suspension support device that suppresses a rise in a spring constant in a high-frequency range, reduces the weight, and reduces the cost.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a first holding portion having a first through hole to which one side is inserted and attached, and a space provided between the first holding portion and the first holding portion. A second holding portion provided with a second through hole to be inserted and mounted on the other side, and a pair of side portions connecting the first and second holding portions on both sides, the whole being formed from a rubber-like elastic material; In the hanging support device, the thickness of the pair of side portions in the axial direction is reduced, and the cross-sectional area at the side portion is smaller than the cross-sectional area at the boundary between the first and second holding portions and the pair of side portions. It is.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, the overall shape is substantially elliptical when viewed from the front, and the whole is vulcanized and molded integrally with NR / EPDM, and one side is inserted as in the prior art. A first holding portion 1 having a first through-hole 1A to be attached;
A second holding portion 2 having a second through hole 2A which is provided at a distance from the first holding portion 1 and which is inserted and attached on the other side;
It has a pair of side portions 3 and 4 connecting the first and second holding portions 1 and 2 on both sides, and has a central hole 5 at the center. B of the side part 3 (4) is larger than the cross-sectional area at the boundary AA between the first and second holding parts 1 and 2 and the pair of side parts 3 and 4.
-The cross-sectional area at the line B is reduced.

FIG. 2 is a side view of FIG. 1, in which the axial thickness d of the pair of side portions 3 and 4 is less than half the axial thickness c of the first and second holding portions 1 and 2. Also, the side part 3 (4)
The width e in the width direction is about two thirds of the thickness d or less in the axial direction.

In the embodiment shown in FIGS. 1 and 2, the total length in the vertical direction is 65 mm, the total length in the left and right directions is 55 mm, the thickness c in the axial direction is 30 mm,
The thickness d in the axial direction is 20 mm, the diameter of each through hole 1A, 2A is 12 mm, the thickness e in the width direction is 8 mm, and the whole is NR / SB.
R was vulcanized and molded.

When the above-described embodiment is used with a muffler hanger, a graph shown by a solid line in FIG.
The spring constant did not increase at 0 Hz, but began to increase from around 700 Hz.

In another embodiment shown in FIGS. 4 and 5, the shape of the side portions 3 and 4 is changed, and the shape of the center hole 5 is changed so as to suppress an increase in the spring constant in a higher frequency range. It is shown. The side parts 3, 4 are first and second holding parts 1, 2,
, The cross-sectional area gradually increases, and the cross-sectional area at the central portion of the side portions 3 and 4 is reduced.

[0013]

As described above, according to the present invention, the thickness of the pair of side portions in the axial direction is reduced to be smaller than the sectional area of the boundary between the first and second holding portions and the pair of side portions. Since the cross-sectional area at the side is reduced, it is possible to prevent the side from functioning as a mass in a high-frequency range and to increase the spring constant, thereby enabling vibration isolation at a higher frequency range. Further, by reducing the cross-sectional area of the side portion, the overall weight can be reduced and the weight can be reduced, and the material can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a preferred embodiment of the present invention.

FIG. 2 is a side view.

FIG. 3 is a graph showing a relationship between a frequency and a spring constant comparing a conventional example and an embodiment of the present invention.

FIG. 4 is a front view showing another embodiment.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a front view showing a conventional example.

FIG. 7 is a side view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st holding | maintenance part 1A 1st through-hole 2 2nd holding | maintenance part 2A 2nd through-hole 3,4 Side part

Claims (2)

[Claims] 1. A first holding portion having a first through hole to be inserted and mounted on one side, and a second holding portion provided at a distance from the first holding portion and having a second through hole to be inserted and mounted on the other side. A suspension support device comprising: a second holding portion; and a pair of side portions connecting the first and second holding portions on both sides, and a suspension support device entirely formed of a rubber-like elastic material; Wherein the cross-sectional area at the side portion is smaller than the cross-sectional area at the boundary between the first and second holding portions and the pair of side portions. 2. The first and second axial thicknesses of the pair of side portions are defined as:
A hanging support device wherein the thickness of the pair of side portions in the width direction is less than half the thickness in the axial direction of the holding portion and about two thirds of the thickness in the axial direction.