JPH0452424Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an O-ring for supporting the exhaust pipe of a vehicle, and specifically relates to a dynamometer that prevents vibrations from being transmitted from the exhaust pipe to the vehicle body. This relates to a Mitsuku damper type O-ring.

[Conventional technology]

As shown in FIG. 7, the exhaust pipe is attached to the vehicle body by supporting it with an O-ring 70 made of an elastic material such as rubber to prevent transmission of vibrations from the exhaust pipe 74 to the vehicle body 75. I have to.

In such an O-ring, if the exhaust pipe has a resonance point in the engine's normal rotation range, the elastic properties of an elastic body such as rubber alone cannot suppress the transmission of vibrations, so as shown in Figure 8, To,
Two U-shaped support rubbers 71 and 72
A single mass 73 is interposed between the open ends of the
A dynamic damper type O-ring has been proposed in which the entire vibration path from the exhaust pipe 74 to the vehicle body 75 is subjected to the action of the mass 73 to absorb vibrations (Utility Model Application No. 59-186574).

However, the dynamic damper type O
The ring has a structure in which the left and right open ends of the two support rubbers 71 and 72 are joined by a single mass 73, so when a tensile load is applied, the left and right displacement of the O-ring is restricted and the O-ring moves up and down. The spring constant in this direction increases, which increases the transmission of vibration from the exhaust pipe to the vehicle body, which in some cases actually worsens the vibration noise of the vehicle body.

Therefore, as shown in FIG. 9, the squares are divided and formed, and these divided squares 73a and 7
3b is interposed and joined between opposing open ends of two U-shaped support rubbers 71 and 72 to form an O-ring 70, so that even when a tensile load is applied, the O-ring is not restricted in the left-right direction. , so that it can be freely displaced in any direction,
It is conceivable (unknown) to avoid increasing the spring constant in the vertical direction and without impairing the function of the dynamic damper.

[Problem that the invention attempts to solve]

However, in the above-mentioned O-ring formed by dividing the mass, although the spring constant can be lowered by dividing the mass, since the amount of displacement of the divided mass is large, the support rubber 71
There was a problem in that a large load was applied to the joints with the support rubbers 71 and 72, increasing the displacement of the support rubbers 71 and 72.

Therefore, an object of the present invention is to reduce the load on the joint between the mass and the support rubber in a dynamic damper type O-ring having a divided mass.

[Means for solving problems]

Therefore, the present invention is characterized in that the displacement of the divided masses is regulated.

Specifically, the O-ring structure for supporting an exhaust pipe of the present invention includes two U-shaped support rubbers and each mass formed separately between the opposing open ends of these support rubbers is interposed and joined to form a dynamometer. Configure the Mitsuku damper. The respective masses are connected by a swingable joint.

[Effect]

As a result, when a tensile load is applied to the O-ring,
Each segmented mass is displaced while being regulated by the swingable joint, which reduces the amount of displacement, reduces the load applied to the joint between each mass and the support rubber, and improves durability. be able to. At this time, since the joint that connects each mass is swingable, the amount of displacement can be reduced as described above, and each mass can be easily displaced, without affecting the deformation of the O-ring. Transmission of vibration can be effectively suppressed without increasing the spring constant of the O-ring in the vertical direction.

〔Example〕

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

1 and 2 are front and side views of a first embodiment of the present invention, in which 10 and 20 are support rubbers, 30 and 40 are masses, and 50 is a rubber joint.

The support rubber 10 has a mounting hole 11 in the center, and both ends 12 and 13 are open ends.
It is formed into a letter shape.

Like the support rubber 10, the support rubber 20 is formed into a U-shape with a mounting hole 21 bored in the center and both ends 22 and 23 open.

Both ends 1 of these support rubbers 10 and 20
2 and 13 and 22 and 23 are joined by interposing masses 30 and 40 that are formed separately between opposing ends.

That is, the open end 12 of the support rubber 10
and support rubber 2 facing this open end 12.
0, and a mass 30 is interposed between the support rubber 10 and the open end 22 of the support rubber 10, and a mass is connected between the open end 13 of the support rubber 10 and the open end 23 of the support rubber 20 that By joining with 40 interposed, an O-shaped support rubber ring is formed. Here, iron is used for the masses 30 and 40, and the iron masses 30 and 40 and the support rubbers 10 and 20 are joined by vulcanization adhesion.

The rubber joint 50 includes support rubbers 10 and 20.
The O-ring is interposed between the ends of the masses 30 and 40 on the inner peripheral side of the O-ring formed by the masses 30 and 40 to connect the masses 30 and 40. The connection between the rubber joint 50 and the masses 30 and 40 is also performed by vulcanization adhesion in the same manner as the support rubbers 10 and 20 described above.

Then, one end of the hanging fitting 77 fixed to the vehicle main body 75 is inserted into and engaged with the mounting hole 11, and one end of the hanging fitting 76 fixed to the exhaust pipe 74 is inserted into and engaged with the mounting hole 21, so that the exhaust Connect the pipe 74 to the vehicle body 7
5.

As a result of the above configuration, support rubber 1
Even if a tensile load is applied to the mounting holes 11 and 21 of 0 and 20 due to fluctuations in the exhaust pipe 74 and the vehicle body 75, the masses 30 and 40 are mutually controlled by the swingable rubber joint 50. However, since the O-rings are displaced, the amount of displacement becomes small, and the load applied to the joints between the respective masses 30 and 40 and the support rubbers 10 and 20 is reduced, and the durability of the O-ring can be improved. At this time, each square 3
Since the rubber joint 50 that connects the O-rings 30 and 40 is swingable, the amount of displacement can be reduced as described above, and each mass 30 and 40 can be easily displaced. Transmission of vibration can be effectively suppressed without affecting deformation and without increasing the spring constant of the O-ring in the vertical direction.

3 and 4 are a front view of a second embodiment of the present invention and a cross-sectional view taken along the line -2 of this front view. In place of the rubber joint 50 in the embodiment, a hinge 60
This is done by

That is, the hinge 60 has elongated holes 61 and 62 integrally formed at the lower end of the inner peripheral side of the mass 30 except for the center part, and the central part of the mass 30 is formed at the center of the lower end of the inner peripheral side of the mass 40. By integrally forming a long hole 63 corresponding to
The masses 30 and 40 are connected by inserting a mandrel 65 therein.

Also in this embodiment, the cells 30 and 40 are
Since they are connected by a swingable hinge 60, the amount of displacement can be reduced, and the support rubber 10
Moreover, it is possible to reduce the load on the joints between 20 and masses 30 and 40, thereby improving the durability of the O-ring. In addition, since the joint connecting each mass 30 and 40 is a swingable hinge 60, the amount of displacement can be reduced as described above, and the O-ring can be easily displaced around the shaft 65. The transmission of vibration can be effectively suppressed without affecting the deformation due to the tensile load and without increasing the spring constant of the O-ring in the vertical direction.

In addition, in this embodiment, the hinge 6 is used as a joint.
Since the connection is made by the 0, it is possible to easily connect each of the divided squares 30 and 40, and the durability of the connection portion can be further improved.

Although a specific embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and includes various embodiments within the scope of the claims for utility model registration. For example, as shown in FIG. 5, in order to increase the area of the joint between the support rubbers 10 and 20 and the separately formed masses 30 and 40, the masses 30 and 40 are placed around the circumference of the O-ring. The tangentially interposed parts may be connected by a swingable joint, and as shown in FIG. In the case where the inner circumferential ends are made to protrude largely toward the inner circumferential side and intersect with each other, the intersecting portions may be connected by a swingable joint.

[Effect of idea]

As described above, according to the present invention, the displacement of each mass is regulated by connecting each segmented mass with a swingable joint, so that when a tensile load is applied to the O-ring, the segmentation occurs. Each formed mass is displaced while being regulated by the swingable joint, so the amount of displacement is reduced, the load applied to the joint between each mass and the support rubber is reduced, and durability is improved. I can do it. At this time, since the joint that connects each mass is swingable, the amount of displacement can be reduced as described above, and each mass can be easily displaced, so that it will not deform due to the tensile load of the O-ring. has no influence, and the transmission of vibration can be effectively suppressed without increasing the spring constant of the O-ring in the vertical direction.

[Brief explanation of drawings]

Figure 1 is a front view of the first embodiment of the present invention;
The figure is a side view including a cross section taken along the line - in FIG. 1;
FIG. 3 is a front view of the second embodiment of the present invention, FIG. 4 is a sectional view taken along the - line of the second embodiment, FIG. 5 is a front view of the third embodiment of the present invention, and FIG. The figure shows a front view of a fourth embodiment of the present invention, and FIGS. 7 to 9 show front views of conventional O-rings. 10...Support rubber, 20...Support rubber, 30...Mass, 40...Mass, 50...Rubber joint (joint), 60...Hinge (joint).

Claims (1)

[Claims for Utility Model Registration] An O-ring made of an elastic body for supporting an exhaust pipe on a vehicle body, this O-ring is made up of two U-shaped support rubbers, and the opposing openings of the support rubbers are An O-ring for supporting an exhaust pipe, characterized in that the O-ring is configured to form a dynamic damper by intervening and joining each of the masses formed separately between the ends, wherein the masses are connected by a swingable joint. structure.