JPH07103282A - Damper - Google Patents

Abstract

PURPOSE:To improve vibration damping caused by bending resonance without drastically increasing a weight by bonding and holding a vibrationproof member formed by a clothlike article formed by braiding thin metallic linear bodies on the front surface of a vibration body. CONSTITUTION:A vibrationproof member 3 is a clothlike article formed by braiding thin metallic linear bodies 5, and the braided and thin metallic linear bodies 5 like a clothlike article for forming the vibrationproof article 3 is displaced by following the movement of the vibration body 2 when a vibration body 2 resonates at the specific frequency. And friction are generated on contact parts 6 where the metallic linear bodies 5 are brought in contact with each other, and vibration of the vibration body 2 can be damped by the friction. Particularly, extremely effective damping can be obtained to the bending resonance of the vibration body 2 formed by pipes, etc. The vibrationproof member 3 is pressed as a damper to the front surface 2a of the vibration body 2 by means of an elastic member 4 such as a spring, etc., so as to be bonded and held thereon. Since this vibrationproof structure is not a double structure wherein the whole of pipes is formed into the double structure like, a double pipe, the drastic increase of weight is not caused.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper, and more particularly to a damper that effectively damps vibrations caused by bending resonance.

[0002]

2. Description of the Related Art For example, noise emitted from an exhaust pipe is often a problem in noise outside a vehicle. The exhaust pipe is generally made of a thin steel pipe and has almost no vibration damping effect by itself, so that when the vibration from the engine is transmitted to the exhaust pipe, it causes a radiated sound from the exhaust pipe.

As means for preventing the above-mentioned radiated sound, conventionally,
Consists of an inner tube and an outer tube that is adhered and laminated on this inner tube 2
There is a proposal to use a heavy pipe. With respect to the vibration (resonance) caused by the cross-sectional change in the pipe, the vibration is damped by the friction between the inner pipe and the outer pipe. However, even though this double tube is effective for crushing resonance, twisting resonance, etc., it has not yet effectively provided a damping effect for bending resonance of the tube, which is particularly problematic with radiated sound. Further, since the exhaust pipe has a double structure, there is a problem that the weight is significantly increased.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a damper capable of improving damping of vibrations caused by bending resonance without increasing the weight significantly.

[0005]

The damper of the present invention which achieves the above object comprises a vibration isolating member formed by braiding a thin metal linear body and formed of a cloth-like material in close contact with the surface of the vibrating body. Characterize.

[0006]

According to the present invention, since the vibration isolating member having the above-mentioned structure and closely held on the surface of the vibrating body is formed of the cloth-like material in which the thin metal linear body is braided, the vibrating body resonates at a predetermined frequency. However, since the braided metal linear body forming the vibration damping member is displaced following the movement of the vibrating body, friction occurs at the contact portion where the metal linear bodies contact each other, and the friction causes the vibrating body. The vibration of can be dampened. In particular, a very effective damping effect can be obtained with respect to bending resonance of a vibrating body including a pipe or the like. In addition, since the thin metal linear body is formed by braiding, the entire tube does not have a double structure unlike a double tube, and a significant increase in weight is not caused.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective explanatory view of a damper according to the present invention. The damper 1 of the present invention has a structure in which a vibration-proof member 3 is closely held on a surface 2a of a vibrating body 2 by being pressed by an elastic member 4 such as a spring. Has become.

As shown in FIG. 2, the anti-vibration member 3 is formed of a cloth-like material in which a thin metal linear body 5 such as a metallic wire or a thin band is formed into a braid. The metal linear body 5 is not particularly limited and may be a conventionally known one, for example, a steel wire is preferably used. As the braided structure of the metal linear bodies 5, for example, a plurality of the metal linear bodies 5 arranged in parallel can be braided so as to be orthogonal to each other, but it is not particularly limited thereto. The anti-vibration member 3 may be provided on the entire surface of the vibrating body 2 or partially, and the adhering area of the anti-vibration member 3 can be adjusted according to the need of the damping effect.

The vibration isolator 3 is attached to the vibrating body 2 so that the metal linear body 5 intersects the vibration transmitting direction A of the vibrating body 2 in the opposite direction at the same angle. It is not limited. As described above, according to the present invention, in the damper 1 in which the vibration isolating member 3 is closely held on the surface 2a of the vibrating body 2, the vibration isolating member 3 is formed of a cloth-like object in which the thin metal linear body 5 is braided. Therefore, when the vibrating body 2 resonates at a predetermined frequency, the thin metal linear body 5 of the braided cloth-like material forming the vibration isolating member 3 is displaced following the movement of the vibrating body 2, and as shown in FIG. As shown, friction is generated in the contact portion 6 where the metal linear bodies 5 contact each other, and the vibration of the vibrating body 2 can be damped by the friction. In particular, the vibrating body 2 composed of a pipe or the like
It is possible to obtain extremely effective damping for the bending resonance of.

Further, a thin metal linear body 5 is braided,
Unlike the double pipe, the entire pipe does not have a double structure, so that the weight is not significantly increased. In addition, the increase in the heat capacity of the vibrating body 2 itself is small, and problems due to temperature rise are unlikely to occur. Then, the necessary damping effect can be easily obtained by adjusting the contact area of the vibration isolating member 3 with respect to the vibrating body 2.

Further, by holding the vibration-proof member 3 in close contact with the surface 2a of the vibrating body 2 by pressing it with the elastic member 4,
Even if the anti-vibration member 3 deteriorates over time, the surface 2a of the vibrating body 2 can always have a high surface pressure and a large contact area, so that the damping effect can be maintained for a long time. FIG. 4 is a graph showing the difference in damping characteristics between the damper 1 (dotted line) of the present invention provided with the vibration isolating member 3 and the case without the anti-vibration member 3 (solid line). The damper 1 of the present invention has a low vibration level even in bending resonance and crushing resonance, and the vibration body 2
It can be seen that the vibration of is effectively damped.

The vibrating body 2 is not particularly limited as long as it is a vibrating and lightweight general structure.
For example, an exhaust pipe connected to the engine can be preferably used.

[0013]

As described above, according to the present invention, in the damper in which the vibration isolating member is closely held on the surface of the vibrating body, the vibration isolating member is formed of a cloth-like material in which thin metal linear bodies are braided. Even if the vibrating body resonates at a predetermined frequency, the vibration of the vibrating body can be damped by the following displacement of the metal linear body. In particular, for bending resonance of a vibrating body consisting of a pipe,
It is extremely effective. Moreover, since the thin metal linear body is formed by braiding, the entire tube does not have a double structure unlike a double tube, and a significant increase in weight is not caused.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of a damper of the present invention.

FIG. 2 is a plan view of an essential part of the vibration isolator of FIG.

FIG. 3 is an enlarged perspective view of an essential part of a vibration isolation member.

FIG. 4 is a graph showing damping characteristics of the damper (dotted line) of the present invention provided with a vibration isolating member and the damping characteristic without a vibration isolating member (solid line).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 damper 2 vibrating body 2a surface 3 anti-vibration body 4 elastic member 5 metal linear body

Claims (2)

[Claims] 1. A damper comprising a vibration-proof member formed by braiding a thin metal linear body and formed of a cloth-like material in close contact with the surface of the vibration body. 2. The damper according to claim 1, wherein the vibration isolation member is held in close contact with the surface of the vibrating body by an elastic member.