JP2591097Y2 - Exhaust pipe 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 pipe supporting device for supporting an exhaust pipe of an automobile engine on a vehicle body.

[0002]

2. Description of the Related Art As an exhaust system of an automobile engine, an exhaust port is disposed on a front side of an engine mounted on a front portion of a vehicle body, and an exhaust manifold connected to the exhaust port extends downward. The connected exhaust pipe system extends to the lower side of the engine, and a flexible tube is connected to the tip of the exhaust pipe system fixed to the engine at the lower position of the engine to transmit engine vibration to the exhaust pipe. Shut off and connect the front end of an exhaust pipe arranged in the front and rear direction of the vehicle body to the rear end of the flexible tube at the lower part of the vehicle body. There is known an elastic pipe which is elastically supported in a direction and an appropriate portion of an intermediate portion of an exhaust pipe is elastically supported by a vehicle body. With such a configuration, the vibration of the engine is transmitted to the exhaust pipe to resonate, and the vibration of the exhaust pipe is transmitted to the vehicle body via the support device, thereby preventing generation of unpleasant vibration noise.

As a specific example of the structure of the exhaust pipe front end support device, as shown in FIG. 5, one end of a support piece 34 is fixed to the front end of an exhaust pipe 31 having a flexible tube 33 connected to the front end. It is known that the other end of the support piece 34 extends horizontally to one side in the vehicle body width direction, and the other end is inserted and engaged with the elastic support means 35. The elastic support means 3
5 has an elastic body 37 of an appropriate shape integrally fixed inside a tubular member 36 fixed to a cross member 32 disposed at the rear portion of the engine, and is provided in a horizontal engaging hole 38 formed in the center thereof. By inserting the other end of the support piece 34, the support piece 34
Are vertically elastically supported.

In Japanese Utility Model Laid-Open Publication No. Sho 61-155622, the other end of the support piece extends in the front-rear direction of the vehicle body, and a member on the vehicle body supporting the exhaust pipe is also disposed in the front-rear direction. Although different in point, a similar configuration is disclosed.

[0005]

However, in the structure of the exhaust pipe supporting device as shown in FIG. 5, the vertical movement of the front end of the exhaust pipe to which the flexible tube is connected can be suppressed. (Or in the front-back direction), the behavior is free, so that the displacement of the flexible tube is increased and an excessive stress is applied, which causes a problem that its life is shortened.

In view of the above problems, the present invention resiliently supports the front end of an exhaust pipe provided in a lower part of a vehicle body in all directions to prevent an excessive stress from acting on a flexible tube. It is another object of the present invention to provide an exhaust pipe supporting device in which transmission of vibration is prevented.

[0007]

According to the present invention, an exhaust pipe system is provided at a lower portion of a vehicle body in a longitudinal direction of the vehicle body and is fixed to an engine side via a flexible tube connected to a front end of the vehicle body. In an exhaust pipe supporting device for supporting a front end of an exhaust pipe with a cross member at a front part of a vehicle body, one ends of first and second support pieces are fixed to a front end of the exhaust pipe, and the first support piece is disposed in a horizontal direction. The extended other end is inserted into and engaged with a first stopper elastically supporting in the vertical direction, and the other end vertically suspended of the second support is inserted into a second stopper elastically supporting in the front, rear, left and right directions. It is characterized by being engaged.

[0008]

According to the present invention, the front end of the exhaust pipe is elastically moved in the vertical and horizontal directions by the first and second stoppers via the first and second supports. To prevent large displacement of the flexible tube connected to the front end of the exhaust pipe, and to prevent excessive stress from being generated.Also, since the flexible tube is elastically supported, vibration transmission is ensured. Is prevented.

In the present invention, the first stopper and the second stopper
If the first stopper is disposed closer to the flexible tube than the second stopper together with the stopper together with the cross member, the following operation is performed. In other words, the present invention relates to a structure in which the front end of the exhaust pipe is elastically supported by a stopper attached to the cross member, but from the viewpoint that the regulation of displacement due to the weight of the exhaust pipe is most important, By disposing the first stopper at a position farther from the center of gravity of the exhaust pipe (a position closer to the flexible tube), the displacement of the exhaust pipe can be effectively controlled, and the second stopper does not increase the weight of the exhaust pipe. The stopper is arranged at a position farther from the flexible tube, and only the displacement of the exhaust pipe in the front-rear and left-right directions is restricted.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1 and FIG. 2, reference numeral 1 denotes an exhaust pipe disposed at a lower portion of the vehicle body in the front-rear direction of the vehicle body. I have. The cross member 2 in the illustrated example is configured by a suspension member that integrally connects the left and right suspensions 9, 9. A flexible tube 3 is connected to a front end of the exhaust pipe 1, and is connected to an exhaust pipe system 4 such as an exhaust manifold or a front pipe fixed to an engine (not shown) via the flexible tube 3.

At the front end of the exhaust pipe 1, a first support 5 and a second support 5 are provided.
One end of the support piece 6 is integrally fixed by welding. The other end 5a of the first support 5 extends horizontally in the front-rear direction of the vehicle body, and the other end 5a is inserted and engaged with a first stopper 7 elastically supported in the vertical direction.

The other end 6b of the second support piece 6 is vertically suspended, and the other end 6a is inserted and engaged with a second stopper 8 elastically supported in the front-rear and left-right directions. These first
The stopper 5 and the second stopper 6 are fastened and fixed to the cross member 2.

The first stopper 7, as shown in FIG.
An elastic member 12 of an appropriate shape is integrally fixed inside a cylindrical member 11 formed by combining a U-shaped member 11a and an inverted U-shaped member 11b, and a horizontal direction formed at a central portion 12a of the elastic body 12 is formed. The other end 5 of the first support piece 5 is
The first support piece 5 is configured to be elastically supported in the vertical direction by inserting a. Central part 1 of elastic body 12
2a is a relatively thick and short upper and lower connecting portion 12b,
1, is elastically supported mainly in the vertical direction, and is also connected to the left and right sides of the tubular member 11 by relatively thin and long left and right connecting portions 12c to reinforce against vertical displacement. Also, it is configured to suppress excessive displacement to the left and right. Further, a fastening bolt 14 is hung from the lower surface of the tubular member 11 and a projection 15 for preventing rotation is provided so as to be fastened and fixed to the cross member 2 with a nut 16 as shown by a virtual line. It is configured.

As shown in FIG. 4, the second stopper 8 is disposed farther away from the flexible tube 3 than the first stopper 8, and the mounting bracket is formed by welding a holding ring 23 to one end of the mounting plate 22. 21 and an elastic disk 25 fitted and mounted on the inner periphery of the retaining ring 23, and the second support piece 6 is inserted into a vertical engaging hole 26 formed in the center of the elastic disk 25. By inserting the other end 6a, the second support piece 6 is configured to be elastically supported in the front-rear and left-right directions. Then, a pair of fastening bolts 24 is hung downward from the mounting plate portion 22, and is fastened and fixed to the cross member 2 by a nut 27 as shown by a virtual line. Further, the engagement hole 26 of the cross member 2
A large-diameter hole 28 is drilled in a portion corresponding to a position immediately below the second member 6 so as not to interfere with the cross member 2 even if the other end 6a of the second support piece 6 inserted into the engagement hole 26 is displaced. I have.

In the above construction, the other end portions 5a and 6a of the first support 5 and the second support 6 fixed to the front end of the exhaust pipe 1 are engaged with the engagement holes 13 of the first stopper 7 and the second stopper, respectively. 8
The front end of the exhaust pipe 1 is elastically supported by the first stopper 7 and the second stopper 8 in any of the vertical direction, the front-rear direction, and the left-right direction. . Therefore, the front end of the exhaust pipe 1 is
It is possible to reliably prevent large displacement from side to side,
It is possible to reliably prevent the flexible tube 3 connected to the front end of the exhaust pipe 1 from being largely displaced and causing excessive stress. Further, since the front end of the exhaust pipe 1 is elastically supported and is not fixed, the transmission of vibration is reliably prevented.

[0017]

According to the exhaust pipe support device of the present invention, the front end of the exhaust pipe is moved vertically and forward / backward / left / right by the first and second stoppers via the first and second support pieces. Since a large displacement is prevented by being elastically supported in any direction, the flexible tube connected to the front end of the exhaust pipe can be prevented from undergoing a large displacement to generate excessive stress, and can be elastically supported. Therefore, vibration transmission can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of an exhaust pipe support device of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 shows a first stopper according to the embodiment, and FIG.
FIG. 2 is a front view, and FIG. 2B is a plan view taken along the line AA of FIG.

FIG. 4 shows a second stopper in the embodiment, and FIG.
Is a plan view, and (b) is a cross-sectional front view taken along the line BB of (a).

FIG. 5 is a perspective view of a conventional exhaust pipe support device.

[Explanation of symbols]

 Reference Signs List 1 exhaust pipe 2 cross member 3 flexible tube 5 first support 6 second support 7 first stopper 8 second stopper

Claims (2)

(57) [Scope of request for utility model registration] 1. A front end portion of an exhaust pipe which is disposed in a vehicle front-rear direction at a lower portion of a vehicle body and is connected to an exhaust pipe system fixed to an engine via a flexible tube connected to a front end thereof. In the exhaust pipe supporting device supported by the cross member of the section, one ends of the first and second supports are fixed to the front end of the exhaust pipe, and the other end of the first support extending in the horizontal direction is connected to the other end. The second stopper is inserted into and engaged with a first stopper elastically supported in the vertical direction, and the other end vertically suspended of the second support piece is inserted into and engaged with a second stopper elastically supported in the front-rear and left-right directions. Exhaust pipe support device. 2. The exhaust pipe supporting device according to claim 1, wherein the first stopper and the second stopper are both attached to the cross member, and the first stopper is located closer to the flexible tube than the second stopper.