JP2972074B2 - Exhaust system parts support device - Google Patents

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 support device for elastically supporting an exhaust system component of a vehicle on a vehicle body.

[0002]

2. Description of the Related Art A technique for elastically supporting an exhaust pipe with respect to a vehicle body to suppress transmission of vibration to the vehicle body to prevent deterioration of vehicle interior noise is disclosed, for example, in Japanese Utility Model Publication No. 50-4118. . The exhaust system support device of this publication is provided with a wire on an anti-vibration rubber body that supports the exhaust system component on the vehicle body side, and prevents the exhaust system component from falling off with the wire even when the anti-vibration rubber body is broken. It has become.

[0003]

However, in the exhaust system supporting device disclosed in Japanese Utility Model Laid-Open Publication No. 50-4118, the vibration isolating rubber body 2 is supported vertically as shown in FIG. The vibration isolating rubber body 2 swings with respect to displacement due to thermal expansion or thermal contraction of the exhaust pipe 4. Therefore, the support height of the main muffler 6, that is, the alignment S in the height direction changes, which causes noise and vibration (noise vibration) to deteriorate. Further, as shown in FIG. 9A, when the main muffler 6 bounces (arrow F ₁ ), the wire 8 in the rubber cushion 2 functions as a stopper for preventing excessive deformation of the rubber cushion 2. However, as shown in FIG. 9B, when the main muffler 6 rebounds (arrow F ₂ ), the wire 8 does not perform the function of preventing excessive deformation of the rubber vibration insulator 2. Therefore, there is a problem that the durability of the vibration isolating rubber body 2 is reduced due to excessive deformation of the vibration isolating rubber body 2 when the main muffler 6 rebounds.

[0004] The present invention provides an exhaust system component capable of maintaining a constant supporting height of an exhaust system component with respect to expansion and contraction of an exhaust pipe and preventing excessive deformation of an elastic member when the exhaust system component bounces and rebounds. It is an object of the present invention to provide a supporting device.

[0005]

According to the present invention, there is provided a supporting device for an exhaust system component for elastically supporting the exhaust system component on a vehicle body via an elastic member. A support hole into which a support member provided on the vehicle body side or the exhaust system component side is inserted is formed at both ends in the horizontal direction of the elastic member arranged parallel to the longitudinal direction of the exhaust system component. In the member, a loop-shaped reinforcing wire is buried so that the support hole is disposed inside when viewed in a longitudinal cross section of the elastic member, and the outer periphery of the elastic member is located between the two support holes. It consists of a support bracket that movably supports an exhaust system component.

[0006]

In the exhaust device supporting apparatus, the outer periphery of an elastic member arranged in parallel with the longitudinal direction of the exhaust system component is provided.
The support bracket that hangs the exhaust system component is movably supported, so if the exhaust pipe expands or contracts due to thermal expansion or thermal contraction, the support bracket moves parallel to the longitudinal direction of the exhaust system component relative to the elastic member. Will do.
That is, when the exhaust pipe expands and contracts, only the support bracket moves, and the elastic member horizontally supported by the support member does not move. Therefore, unlike the conventional structure, the supporting height of the exhaust system components does not change due to the expansion and contraction of the exhaust pipe, and deterioration of the noise vibration is prevented. In addition, since the elastic member has a loop-like reinforcing wire embedded so as to surround the support holes formed at both ends in the horizontal direction, the reinforcing wire is used for both the bounce and the rebound of the exhaust system component. Is subjected to a tensile force, and the reinforcing wire functions as a stopper for preventing excessive movement of the exhaust pipe in the vertical direction. Therefore, excessive deformation of the elastic member is prevented, and the durability of the elastic member can be improved.

[0007]

1 to 7 show an embodiment of the present invention. 2, a catalytic converter 22, a sub-muffler 24, and a main muffler 26 are provided in the middle of an exhaust pipe 20 of a vehicle. The upstream end of the exhaust pipe 20 is connected to an engine (not shown). The vicinity of the catalytic converter 22 of the exhaust pipe 20 is supported by a support device 28 on the vehicle body (not shown) side. The main muffler 26 is supported by the support device 30 on the vehicle body side. The present invention can be applied to any of the supporting devices 28 and 30, but in the following description, the exhaust system component is the main muffler 26.

[0010] As shown in FIG. 1, the supporting device for the exhaust system component includes a support rubber 32 as an elastic member and a support bracket 40. The support rubber 32 is arranged parallel to the longitudinal direction of the main muffler 26. The support rubber 32 is connected and fixed to a floor side member 42, which is a part of the vehicle body, via a support member 44 at both ends in the horizontal direction. The support member 44 is a metal member fixed to the floor side member 42 by welding or the like, and protrudes in two directions separated from each other in a direction parallel to the longitudinal direction of the main muffler 26 in a direction orthogonal to the longitudinal direction of the main muffler 26. It has metal pins 44a and 44b. The pins 44 a and 44 b are inserted into support holes 34 formed at both ends of the support rubber 32 in the horizontal direction, and support the support rubber 32.

3 to 5 show the structure of the support rubber. In this embodiment, the support rubber 32 is formed in a thick plate shape curved upward. Support rubber 3
2 is curved upward in order to make the support rubber 32 substantially horizontal when the main muffler 26 is suspended, but may have another external shape. As shown in FIG. 4, both ends of the support rubber 32 protrude in the width direction. This is because the metal pins 44a, 44
This is to ensure a large supporting area with b.

At both ends in the horizontal direction of the support rubber 32,
As described above, the support holes 34 into which the pins 44a and 44b are inserted are respectively formed. In the support rubber 32, a support hole 3 as viewed in the longitudinal section of the support rubber 32
A loop-shaped reinforcing wire 50 is buried so that 4 is disposed inside. The reinforcing wire 50 is made of a polyester wire in which polyester fibers are twisted, but any wire having a predetermined tensile strength may be used. For example, a wire rope made of stainless steel may be used, or another resin-made wire may be used. It may be a rope. Reinforcing member 50
Is fixed to the support rubber 32 by molding, so that the reinforcing member 50 and the support rubber 32 cannot move relative to each other.

On one end face of the support rubber 32, a narrow groove 36 or a small hole 3 for tuning the frequency of the exhaust system is provided.
7 are formed. The support rubber 32 is formed by a mold (not shown). The mold is provided with a plurality of positioning pins (not shown) for pulling the reinforcing wire 50 into a predetermined shape (an inverted shape). One of the positioning pins is shared with a pin for forming the support hole 34. The other positioning pins are also used as pins for forming small tuning holes 37 located at the center of the support rubber 32. The protrusion (not shown) of the mold for forming the narrow groove 36 also has a function of regulating the position of the reinforcing wire 50 from the end face of the support rubber 32, for example.

The support bracket 40 is fixed to the outer peripheral surface of the main muffler 26. Support bracket 4
The upper end 40a of the zero is slidably fitted to the outer peripheral surface of the support rubber 32. The upper end portion 40 a of the support bracket 40 is located between the two support holes 34 and is moved in the longitudinal direction X of the main muffler 26. Thus, expansion and contraction of the exhaust pipe 20 due to thermal expansion or thermal contraction is absorbed by the relative movement between the support rubber 32 and the support bracket 40.

Next, the operation of the exhaust system component supporting apparatus will be described. Immediately after the start of the engine of the automobile, the exhaust pipe 20 is cold, and the exhaust pipe 20 is contracted in the longitudinal direction. In this state, as shown in FIG.
Is moving in the vehicle traveling direction. After the engine is warmed up, the exhaust pipe 20 becomes hot due to the heat received from the exhaust gas, and the exhaust pipe 20 expands in the longitudinal direction. In this state,
As shown in FIG. 6B, the support bracket 34 moves in the direction opposite to the vehicle traveling direction with respect to the support rubber 32.

Since the support rubber 32 is substantially horizontal when the main muffler 26 is suspended, the support bracket 40 moves horizontally along the support rubber 32. Thus, the support height of the main muffler 26 does not change even if the exhaust pipe 20 expands and contracts.
As compared with the conventional structure shown in FIG.

When the vehicle is running, the exhaust pipe 20 vibrates in the vertical direction due to irregularities on the road surface, and the support rubber 32 from which the main muffler 26 is suspended is elastically deformed in the vertical direction. Since the reinforcing wire 50 buried in the support rubber 32 has a concave shape, when the amount of elastic deformation in the vertical direction of the support rubber 32 is small, the reinforcing wire 50 is in a loose state, and Has no tension.

FIG. 7A shows a state in which the main muffler 26 is stationary, and FIG. 7B shows a state in which the main muffler 26 bounces. Main muffler 26
There when trying bound to direction of arrow F ₁ by a predetermined amount or more, the pin 44a of the support member 44 inserted reinforcing wire member 50 within the support hole 34, caught by the 44b, the reinforcing wire 50
Is subjected to a tensile force. Thereby, the support rubber 32
Cannot be elastically deformed and the support rubber 32
Is prevented from being excessively deformed. FIG. 7C shows a state when the main muffler 26 rebounds. When the main muffler 26 attempts to rebound in the arrow F ₂ direction more than a predetermined amount, the pin 44a, 44 of the support member 44 is a reinforcing wire 50 in the same manner as described above is inserted into the supporting hole 34
b, a tensile force acts on the reinforcing wire 50,
Excessive deformation of the support rubber 32 is prevented.

As described above, when the main muffler 26 bounces over a predetermined amount or rebounds, the reinforcing wire 50
Functions as a tension stopper, and the support rubber 32 is suppressed within a predetermined elastic deformation. Therefore,
The tensile stress acting on the support rubber 32 is also reduced, and the durability of the support rubber 32 is increased. As shown in FIG. 7D, even if the support rubber 32 is damaged,
Since the support bracket 34 is hooked on the reinforcing wire 50, it is possible to prevent the main muffler 26 from separating from the vehicle body side and interfering with the road surface. Also, if the support rubber 32 is broken, the main muffler 26 is directly supported by the reinforcing wire 50, so that the noise vibration is extremely deteriorated, and the occupant of the vehicle immediately notices this. Become. Therefore, the support device 30 also has a warning (warning) function.

[0018]

According to the present invention, there is provided a support in which a support member provided on a vehicle body side or an exhaust system component is inserted into both horizontal ends of an elastic member arranged parallel to the longitudinal direction of the exhaust system component. A hole is formed, a loop-shaped reinforcing wire is buried in the elastic member so that the support hole is disposed inside, and a support for suspending the exhaust system component located between the two support holes on the outer periphery of the elastic member. Since the bracket was movably supported,
The supporting height of the exhaust system component with respect to the expansion and contraction of the exhaust pipe can be made constant, and deterioration of noise vibration can be prevented. In addition, excessive deformation of the elastic member when the exhaust system component bounces and rebounds can be prevented, and the durability of the elastic member can be improved.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of an exhaust system of a vehicle provided with the support device of FIG. 1;

FIG. 3 is a front view of the support rubber of FIG. 1;

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a schematic diagram showing a change in height-direction alignment accompanying movement of a support bracket due to expansion and contraction of an exhaust pipe in FIG. 1;

FIG. 7 is a schematic diagram showing a deformed state of a support rubber accompanying displacement of a main muffler of FIG. 1;

FIG. 8 is a schematic view showing a change in height direction alignment in a conventional exhaust system component support device.

FIG. 9 is a schematic diagram showing a deformed state of a support rubber in the support device of FIG. 8;

[Explanation of symbols]

 Reference Signs List 20 exhaust pipe 26 main muffler as exhaust system component 32 support rubber as elastic member 34 support hole 40 support bracket 44 support member 50 reinforcing wire

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-15039 (JP, A) JP-A-50-4118 (JP, U) JP-A-3-1212 (JP, U) (58) Investigation Field (Int.Cl. ⁶ , DB name) F01N 7/00 F01N 7/08 B60K 13/04 F16F 15/08

Claims (1)

(57) [Claims] 1. An exhaust system component support device for elastically supporting an exhaust system component on a vehicle body via an elastic member, wherein both ends of the elastic member in a horizontal direction are arranged in parallel with a longitudinal direction of the exhaust system component. A support hole provided on the vehicle body side or the exhaust system component side, into which a support member is inserted. The support hole is arranged inside the elastic member when viewed in a longitudinal section of the elastic member. Embedded in a loop-shaped reinforcement wire, and movably supports a support bracket for suspending the exhaust system component located between the support holes on the outer periphery of the elastic member. Support device.