JPH07127448A - Support device for exhaust part - Google Patents

Abstract

PURPOSE:To support an exhaust part from a car body without generating noise and the occurrence of a problem on heat resistance of rubber. CONSTITUTION:In structure wherein an exhaust part, such as a muffler 6, is supported from a car body 5 through a resilient member, such as support rubber 3, support rubber 3 is arranged in the longitudinal direction of an exhaust pipe, the two ends of the support rubber 3 are supported to the car body 5, and a suspension support 12 fixed to the exhaust part 6 is caused to span the outer periphery of the intermediate part of the support rubber 3. The suspension support 12 is extended throughout the overall length of the exhaust part 6, the two ends thereof are fixed to the exhaust part 6, and the support rubber 3 is caused to span the central part of the suspension support.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust system component supporting device for supporting an automobile exhaust system component on a vehicle body.

[0002]

2. Description of the Related Art Since an exhaust pipe is a structure that is long in the axial direction and has one end suspended by an engine and the other end suspended by an automobile body, it often has a number of resonance points. For this reason, support for the body is performed through a soft and highly dampening support means, which is a node of vibration of the exhaust pipe, and a part with high body rigidity, which suppresses vibration transmission to the body and reduces vehicle interior noise. It is necessary to prevent the deterioration of. Since the vicinity of the center of gravity of a heavy-weight exhaust system component such as a muffler is likely to become a node of vibration of the exhaust pipe, it is optimal as an exhaust pipe support point. For example, the actual exploitation 56-12092
No. 0, gazette, a metal locking member is welded to the outer periphery of the central portion in the axial direction of a muffler tubular casing, and a metal fitting member is slid in the axial direction of the tubular casing with respect to the locking member. An exhaust pipe support device has been proposed in which a fitting member made of metal is freely fitted and connected to a vehicle body via rubber.

[0003]

However, the prior art has the following problems. First, since the locking member fixed to the muffler and the fitting member connected to the body side are in sliding contact with each other, noise due to rattling at that portion becomes a problem. In addition, the locking member is fixed to the central part of the muffler where the temperature is the highest, and the rubber that supports the fitting member from the body is located directly above it, so that the heat of the exhaust gas is large in the rubber. Conduction and rubber durability become a problem. An object of the present invention is to provide a support device for exhaust system parts that can suppress noise and does not pose a problem in terms of rubber durability when elastically supporting the central part of the exhaust system parts in the longitudinal direction from the vehicle body.

[0004]

A support device for an exhaust system component according to the present invention for achieving the above object comprises the following. That is, a support device for an exhaust system component for supporting an exhaust system component of an automobile on a vehicle body of the automobile, the elastic member being arranged parallel to the longitudinal direction of the exhaust system component and supported by the vehicle body at both ends, and the exhaust system component. A support device for an exhaust system component, comprising: a suspension support that extends over both end portions of the elastic member, is connected to both end portions of the exhaust system component at both ends, and is suspended slidably around the outer periphery of the central portion of the elastic member at the central portion.

[0005]

In the above-described device of the present invention, since the sliding portion is in contact with the elastic member and the suspension support between rubber and metal, noise is suppressed as compared with contact between metal and metal.
Also, since the suspension support is fixed to both ends of the exhaust system component and is hung on the elastic member in the central part, the temperature of both end parts of the exhaust system component is lower than that of the central part, and the exhaust system is exhausted at both ends of the suspension support. The heat transferred from the components to the suspension support by heat conduction is removed from the suspension support surface to the surrounding air while being transferred from both ends of the suspension support to the center of the suspension support by heat transfer. It is kept relatively low, and the elastic member does not pose a problem in terms of thermal durability.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention, FIGS. 4 to 6 show a second embodiment of the present invention, and FIGS. 7 to 9 show a third embodiment of the present invention. Shows. FIG. 10 is a schematic configuration of the exhaust system. The same reference numerals are given to constituent parts common to all the embodiments. First, a configuration common to all the embodiments is shown in FIG. 1 to FIG. 3 and FIG.
This will be described with reference to 0. The exhaust pipe 10 of the automobile is shown in FIG.
As shown in FIG. 3, the muffler 6, which is an exhaust system component of a heavy object near one end and the other end, vibrates as a node of vibration, so that the muffler 6 vibrates with its center of gravity (central portion in the longitudinal direction) as a node. First, the muffler 6 is elastically supported from the vehicle body 5. The present support device is also applicable when the catalytic converter 14 is located far away from the engine and wants to support it. In the following description, the exhaust system component is the muffler 6.

As shown in FIG. 1, the exhaust system component supporting device comprises a support rubber 3 which is an elastic member, and a suspension support 12. The support rubber 3 is arranged parallel to the longitudinal direction of the muffler, and is connected and fixed to the floor side member 5 which is a part of the vehicle body at both ends of the support rubber via the support brackets 4. The support bracket 4 is a metal member fixed to the floor side member 5 by welding or the like, and metal pins 4a and 4b protruding in a direction orthogonal to the muffler longitudinal direction at two positions separated from each other in the direction parallel to the muffler longitudinal direction. Have. Pins 4a, 4b
Are inserted into holes formed at both ends of the support rubber 3 to support the support rubber 3. As shown in FIG. 2, the support rubber 3 has a substantially rectangular cross section and a groove 3a on the side surface.
Have. However, if it is not necessary for the hook to be described later to enter the groove 3a, the groove 3a may not be provided.

As shown in FIG. 1, the suspension support 12 extends over both ends of the muffler 6 and is fixed to both ends 7 and 8 of the muffler 6 at both ends of the suspension support. The suspension support 12 has its central portion separated from the muffler 6, and at this central portion, the support rubber 3
It is slidably mounted on the outer periphery of the central part of the. The suspension support 12 is, for example, a rod-shaped metal support 1
And a metal support 2 fixed integrally with the support 1, and the support 2 has a metal hook, which is hung on the support rubber 3. One support 1 extends over the entire length of the muffler 6, is bent at both ends of the support and extends in the circumferential direction of the muffler 6, and the portions extending in the circumferential direction are welded to the curlings 7 and 8 at both ends of the muffler. The muffler curlings 7 and 8 are located at low temperature portions at both ends of the muffler and have high rigidity due to the curling structure, and are suitable as support points.

The suspension support 12 is supported on the support rubber 3 only at the central portion of the suspension support 12. This is because when the suspension support 12 is supported on both ends of the vehicle body by the vehicle body, as shown in FIG. 7, the both end portions have a larger vibration amplitude than the central portion, which is not desirable for transmission of vibration to the vehicle body. This is to prevent a large vibration load from being applied to the support rubber and the muffler. The support hook 2 is, as shown in FIG.
The support rubber 3 rises along one side surface, bends at the upper end of the support rubber 3 and extends along the upper surface of the support rubber 3 to the other side surface of the support rubber 3, and then bends downward to form a groove on the side surface of the support rubber 3. 3a or to the lower end of the support rubber, where it bends toward one side of the support rubber and extends for a short length. As a result, the support hook 2 winds around the outer peripheral surface of the support rubber 3 so as to be slidable in the longitudinal direction of the support rubber and suspends the muffler 6.

A heat insulator 9 is provided on the upper surface side of the muffler 6 to prevent the radiant heat of the muffler 6 from heating the underfloor of the vehicle. The suspension support 12 and the support rubber 3 are also located behind the heat insulator 9 and are prevented from being directly heated by the muffler 6. The heat insulator 9 is composed of, for example, a plate floated from an outer cylinder of the muffler, and is fixed to both ends of the muffler at both ends of the insulator. The heat insulator 9 may be a metal plate or may be a plate made of a material having heat insulation property.

Next, the structure peculiar to each embodiment will be described. In the first embodiment, as shown in FIGS. 1 to 3, a suspension support 12 comprises a rod-shaped support 1 and a plate-shaped support hook 2. The support 1 extends over the entire length of the muffler 6, and both ends of the support 1 extend in the circumferential direction of the muffler 6, where the muffler curlings 7, 8 are provided.
It is welded to. Support hook 2 is support 1
As shown in FIG. 2, the support rubber 3 is welded to the center of the support rubber 3 so that the support rubber 3 is wrapped around, and the tip of the support rubber 3 projects into the groove 3a on the side surface of the support rubber 3. Support hook 2
The both ends of the support rubber in the longitudinal direction are curled as shown in FIG. 3 so that the support hook 2 does not bite into the support rubber 3 during sliding, ensuring smooth sliding. There is.

In the second embodiment, as shown in FIGS. 4 to 6, the suspension support 12 comprises a rod-shaped support 1A and a rod-shaped support hook 2A. The support 1A extends over the entire length of the muffler 6, and the support 1A
Both ends of the muffler extend in the circumferential direction of the muffler 6 and are welded to the muffler curlings 7 and 8 there. Support hook 2
Extends from the central portion of the muffler 6 to one end of the muffler 6 over a half length of the muffler 6. One end of the support hook 2 on the muffler end side is welded to the muffler curling 8, and this portion is separated from the welded part of the support 1 with the muffler curling 8 in the circumferential direction of the muffler, and the left and right sides of the muffler 6 are separated. The directional rigidity is increased. The end portion of the support hook 2 on the center side of the muffler is welded to the center portion of the support 1, and is bent in a direction perpendicular to the longitudinal direction of the muffler, and is slidably wound around the support rubber 3. As shown in FIGS. 5 and 6, the tip of the support hook 2 extends along the lower end of the support rubber 3 in a short manner.

In the third embodiment, as shown in FIGS. 7 to 9, the suspension support 12 is bent so that its cross section has a substantially inverted U-shape and is convex upward in the longitudinal direction. It consists of a bent plate material. The plate suspension support 12 is fixed to the ring portions 7 and 8 at both ends of the muffler 6 by welding or the like at both ends in the longitudinal direction. The central portion in the longitudinal direction of the suspension support 12 is separated from the muffler. The hook portion 2 is also made of a plate material, and the hook portion 2 is fixed to the central portion of the suspension support 12 by welding.

Next, the operation (common to the first, second and third embodiments) will be described. By supporting the central portion of the suspension support 12 by the support rubber 3, the muffler 6 is supported by the vehicle body 5 at its center of gravity. As a result, the exhaust pipe system can be supported by the portion with the smallest vibration amplitude, and transmission of exhaust pipe system vibration to the vehicle body is suppressed. In the case of supporting the muffler on the vehicle body at the center of gravity, conventionally, a bracket was attached to the outer periphery of the muffler to support the muffler on the vehicle body via a slide structure for thermal expansion relief and rubber. There was a problem of noise from hitting each other and heat damage to the rubber just above the bracket. However, in the present invention, the thermal expansion can be escaped by sliding the suspension support 12 and the support rubber 3, and since this portion is the contact between the metal and the rubber, the metal contact noise is not generated and the noise problem is solved. To be done.

Further, since the suspension support 12 is fixed to the muffler 6 by the muffler curlings 7 and 8 which are the lowest temperature parts of the muffler 6 and have the highest rigidity,
The heat transmitted from the muffler 6 to the suspension support 12 is suppressed. Further, the suspension support 12 is hung on the support rubber 3 at the central portion in the longitudinal direction thereof, and the distance between both end portions and the central portion is relatively long, so that heat is transferred from the support surface while heat is transferred to the central portion by heat conduction. The temperature of the central portion of the suspension support 12 is low because the air is sufficiently taken by the air by the transmission. The portion of the suspension support 12 that connects both ends and the central portion has a rod-shaped structure,
Since the heat conduction area (the cross-sectional area of the supports 1 and 1A) is small, the amount of heat conducted from both ends of the suspension support 12 to the center is small, and the temperature of the central portion of the suspension support 12 is suppressed. Therefore, even if the central portion of the suspension support 12 makes sliding contact with the support rubber 3, the support rubber 3 is not thermally deteriorated or damaged.

[0016]

According to the present invention, an elastic member (support rubber of the embodiment) arranged in parallel with an exhaust system component (for example, a muffler), and an elastic member fixed to the exhaust system component at both ends and at the central portion. Since a support device for exhaust parts is composed of a suspension support slidably mounted on the slide support, noise can be prevented by contacting the slide part with metal and rubber, and from the both ends of the suspension support to the center part. The heat transfer of the rubber is suppressed to a small level and the thermal deterioration of the rubber can be suppressed,
The durability of the supporting device can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of an exhaust system component supporting device according to a first embodiment of the present invention.

2 is a cross-sectional view of the vicinity of a support rubber portion of the device of FIG.

FIG. 3 is a side view of the portion of FIG.

FIG. 4 is a perspective view of a support device for an exhaust system component according to a second embodiment of the present invention.

5 is a cross-sectional view of the vicinity of a support rubber portion of the device of FIG.

6 is a side view of the portion of FIG.

FIG. 7 is a perspective view of a support device for an exhaust system component according to a third embodiment of the present invention.

8 is a side view of a support rubber and a suspension support part of the apparatus of FIG.

9 is a plan view of the device of FIG.

FIG. 10 is a vibration amplitude diagram of the exhaust system.

[Explanation of symbols]

 1 Support 2 Support Hook 3 Support Rubber (Elastic Member) 4 Support Bracket 5 Floor Side Member 6 Muffler (Exhaust System Parts) 7 Muffler Curling 8 Muffler Curling 9 Heat Insulator 10 Pipe 11 Tail Pipe 12 Suspension Support

Claims (1)

[Claims] 1. An exhaust system component supporting device for supporting an exhaust system component of an automobile on a vehicle body of the automobile, the elastic member being arranged in parallel with a longitudinal direction of the exhaust system component and supported by the vehicle body at both ends thereof. A suspension support that extends over both ends of the exhaust system component, is connected to both ends of the exhaust system component at both ends, and is slidably hung on the outer periphery of the central portion of the elastic member at the central portion. Support device for exhaust system parts.