JP2010242606A - Supporting device of exhaust pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a supporting device of an exhaust pipe capable of regulating the movement in there directions of the exhaust pipe by one elastic member, simplifying a structure without increasing a number of parts and weight, and being easily manufactured. <P>SOLUTION: In the supporting device of the exhaust pipe, a holding member equipped with an engaging portion horizontally extending in a vehicle front direction or a rear direction on one end side of the supporting member fixed to the exhaust pipe on the other end side, and mounted on a lower portion of a vehicle body, is formed in a U-shape by a bottom portion and right/left side portions, and mounted on the lower portion of the vehicle body so as to position the right/left side portions in a vehicle lateral direction. An elastic member held on an inner surface of the bottom portion and the right/left side portions of the holding member elastically supports an engaging portion of a supporting member in a vehicle vertical direction and the lateral direction. On the right/left side portions of the holding member, a stopper of a band-shaped member for preventing the elastic member from moving in the vehicle front direction is laid over at least on a front side in a vehicle fore-and-aft direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an exhaust pipe support device, and more particularly to an exhaust pipe support device that can restrict movement of the exhaust pipe in three directions with a single elastic member and does not increase the number of parts or weight.

In an exhaust system of an internal combustion engine mounted on a vehicle or the like, an exhaust pipe extending rearward of the vehicle is disposed below the floor of the vehicle body. The exhaust pipe is elastically supported on the lower surface of the floor by a support device, thereby preventing vibrations of the internal combustion engine from being transmitted from the exhaust pipe to the vehicle body.
In the conventional exhaust pipe support device, as shown in FIG. 4, an elastic member 101 is formed in an oval shape, and is attached to a vehicle body by an attachment hole 102 at the upper part of the elastic member 101, and is fitted into an engagement hole 103 at the lower part of the elastic member 101. There is one that engages a support member fixed to the exhaust pipe and elastically supports the exhaust pipe in the vehicle vertical direction (one direction).
Further, in the conventional exhaust pipe support device, as shown in FIG. 5, the elastic member 202 is fixedly held by the holding member 201 attached to the vehicle body, and fixed to the exhaust pipe in the engagement hole 203 of the elastic member 202. Some of the support members engage with each other and elastically support the exhaust pipe in the vehicle vertical direction and the horizontal direction (two directions).
With respect to the movement of the exhaust pipe, it is difficult to restrict the three directions of up and down, left and right, and front and rear with one elastic member. Therefore, only the movement in the up and down direction is restricted in FIG. Regulates direction movement.

  On the other hand, the exhaust pipe support device includes a first elastic support means for elastically supporting the exhaust pipe in the vertical direction and a second elasticity for elastically supporting the exhaust pipe in the front-rear direction and the left-right direction. Some support means are provided to restrict the movement by elastically supporting the exhaust pipe in three directions.

Japanese Utility Model Publication No. 6-58118

  However, since the exhaust pipe support device disclosed in Patent Document 1 is provided with two elastic support means for restricting the movement of the exhaust pipe in three directions, it causes an increase in the number of parts and weight. There is.

  According to the present invention, the movement of the exhaust pipe in three directions can be restricted by one elastic member, the number of parts and the weight are not increased, the structure can be simplified, and the manufacturing can be easily performed. An object of the present invention is to realize an exhaust pipe support device.

  The present invention provides an exhaust pipe support device in which an exhaust pipe extending in the rearward direction of the vehicle is disposed below the vehicle body, and the exhaust pipe is elastically supported at the lower part of the vehicle body, and a support member having one end fixed to the exhaust pipe. The support member is provided with an engaging portion that extends horizontally in the front or rear direction of the vehicle on the other end side, and a holding member that is attached to the lower part of the vehicle body near the exhaust pipe to which the support member is fixed, The holding member is formed in a U shape by a bottom portion extending in the left-right direction of the vehicle and right and left side portions rising from the right and left ends of the bottom portion, and the right and left side portions are positioned in the left-right direction of the vehicle, and An elastic member is provided and is held on the bottom surface of the holding member and the inner surfaces of the right and left side portions, and the elastic member elastically supports the engaging portion of the support member in the vehicle vertical direction and the horizontal direction, Right of the holding member On the left portion, wherein said elastic member at least on the front side has spanned the stopper of the band-shaped member for preventing the moving the vehicle forward in the vehicle longitudinal direction.

The exhaust pipe support device according to the present invention includes a band-shaped member stopper that prevents the elastic member that elastically supports the vertical and lateral movements of the exhaust pipe from moving forward in the vehicle. The three elastic members can regulate the movement of the exhaust pipe in the vertical direction, the horizontal direction, and the front-rear direction, and the number of parts and the weight are not increased.
Therefore, the exhaust pipe support device of the present invention can be simplified in structure and easily manufactured.

(A) is a front view of a support device, (B) is a side view of a support device. (Example) It is a perspective view of a support device. (Example) It is a bottom view of the vehicle provided with the support device. (Example) It is a front view of a support device. (Conventional example 1) It is a front view of a support device. (Conventional example 2)

The present invention provides an exhaust pipe with a single elastic member by providing a belt-shaped member stopper that prevents the elastic member that elastically supports the movement of the exhaust pipe in the vertical direction and the horizontal direction from moving forward. The movement in the three directions is regulated.
Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention. In FIG. 3, 1 is a vehicle, 2 is a floor, 3 is a sub-frame, 4 is an engine, and 5 is a transmission. The vehicle 1 has an engine 4 and a transmission 5 mounted on a subframe 3 on the front side of a floor 2 constituting the vehicle body, and drives left and right front wheels 6 and 7. One end of an exhaust pipe 10 is connected to the engine 4 via an exhaust manifold 8 and a catalytic converter 9 on the front side. The exhaust pipe 10 is curved in the rearward direction of the vehicle at the lower part of the engine 4, is disposed in a tunnel 11 formed on the lower surface of the floor 2, extends in the rearward direction of the vehicle, and is provided with a muffler 12 in the middle.
The exhaust pipe 10 is elastically supported on the lower part of the floor 2 (vehicle body) by a support device 13. The support device 13 supports a support member 14 having one end fixed to the exhaust pipe 10. The support member 14 includes an engaging portion 15 that extends horizontally in the front or rear direction of the vehicle on the other end side. The support member 14 of this embodiment includes an engaging portion 15 that extends horizontally in the vehicle rearward direction.
As shown in FIGS. 1 and 2, the support device 13 is provided with a holding member 16 attached to the lower surface of the floor 2 (lower part of the vehicle body) in the vicinity of the exhaust pipe 9 to which the support member 14 is fixed. The holding member 16 is formed in a U shape by a bottom portion 17 extending in the left-right direction of the vehicle, and a right side portion 18 and a left side portion 19 rising upward from the right end and the left end in the extending direction of the bottom portion 17. A space 20 surrounded by the left side portions 18 and 19 is provided.

The holding member 16 is attached to the lower surface of the floor 2 (lower part of the vehicle body) by an attachment member 21. The attachment member 21 includes a lower attachment member 22, an upper attachment member 23, and an intermediate attachment member 24. The lower mounting member 22 is formed in an inverted saddle shape having an inverted U-shaped cross section, is bent in an L shape in plan view, and is fixed to the lower surface of the bottom portion 17 in a state of protruding rightward from the right side portion 18. ing. The upper mounting member 23 is formed in a bowl shape having a U-shaped cross section, and is fixed to the upper ends of the right and left side portions 18 and 19 in a state of protruding rightward from the right side portion 18. The intermediate mounting member 24 is formed in a flat plate shape and includes a projecting portion 25 in the middle. The upper and lower ends of the intermediate mounting member 24 are fixed to the lower mounting member 22 and the upper mounting member 23 that are projected to the right of the right side portion 18. 25 is fixed to the outer surface of the right side portion 18.
The holding member 16 attaches the upper mounting member 22 of the mounting member 21 to which the lower mounting member 22, the upper mounting member 23 and the intermediate mounting member 24 are fixed to the lower surface of the floor 2 (the lower part of the vehicle body) by fixing means such as bolts and nuts. By fixing, the space 20 surrounded by the bottom portion 17 and the right and left side portions 18 and 19 is directed in the vehicle front-rear direction, and the right and left side portions 18 and 19 are positioned in the vehicle left and right direction on the lower surface of the floor 2. It is attached.

The support device 13 is provided with an elastic member 26 held on the bottom 17 of the holding member 16 and the inner surfaces of the right and left side portions 18 and 19. The elastic member 26 elastically supports the engaging portion 15 of the support member 14 in the vehicle vertical direction and the horizontal direction. The elastic member 26 includes a central portion 27 located at the center of the space 20 surrounded by the bottom portion 17 and the right and left side portions 18 and 19 of the holding member 16, and the central portion 27 as the bottom portion 17 and the right and left side portions 18 and 19. And right and left connecting portions 28 and 29 that are elastically supported in the vertical and horizontal directions. The central portion 27 includes an engagement hole 30 that extends in the horizontal direction toward the vehicle longitudinal direction and engages with the engagement portion 15 of the support member 14. The right and left connecting portions 28 and 29 are extended from the right and left lower portions of the central portion 27 so as to spread obliquely downward to the right and left, and a continuous portion of the bottom portion 17 and the right side portion 18 and the bottom portion 17 and the left side portion 19. It is connected to the continuous part.
The right and left side portions 18 and 19 of the holding member 16 are provided with stoppers 31 that prevent the elastic member 26 from moving in the vehicle front direction at least on the front side in the vehicle front-rear direction. The stopper 31 of this embodiment is made of a flexible band-shaped member made of aramid fiber or the like having high strength and excellent heat resistance such as Kevlar (registered trademark). The stopper 31 wraps the belt-shaped member around the right and left side portions 18 and 19 of the holding member 16 in an annular manner in the horizontal direction, so that the right and left side portions 18 and 19 of the holding member 16 are placed on the front side in the vehicle front-rear direction. The provided front side stopper 31F and the rear side stopper 31R provided on the rear side of the right and left side parts 18 and 19 of the holding member 16 in the vehicle front-rear direction are connected and integrated by the right side connection part 31a and the left side communication part 31b. This is the structure. The front stopper 31F prevents the central portion 27 of the elastic member 26 from moving in the vehicle front direction. The rear stopper 31R prevents the central portion 27 of the elastic member 26 from moving in the vehicle rearward direction.
Further, the right and left side portions 18 and 19 of the holding member 16 are provided with a pair of right front projections 32 and 32 and left front projections 33 and 33 for restricting the vertical position of the front stopper 31F on the front side, and the rear side Are provided with a pair of right rear projections 34 and 34 and left rear projections 35 and 35 for restricting the vertical position of the rear stopper 31R. The front stopper 31F and the rear stopper 31R are provided between the right and left front protrusions 32, 32, 33, and 33 and between the right and left rear protrusions 34, 34, 35, and 35. In addition, a flexible belt-shaped member is looped and attached in a state of being pulled with a predetermined torque so that a constant tension can be maintained.

The support device 13 for the exhaust pipe 10 holds the elastic member 26 on the holding member 16 attached to the lower surface of the floor 2 (the lower part of the vehicle body) by the attachment member 21, and supports the engaging portion 15 of the support member 14 by the elastic member 26. By doing so, the exhaust pipe 10 is elastically supported in the vehicle vertical direction and the horizontal direction.
At normal times, the exhaust pipe 10 moves in the vertical direction and the horizontal direction, and the elastic member 26 restricts the movement in the vertical direction and the horizontal direction.
On the other hand, the exhaust pipe 10 receives an excessive force in the front-rear direction in an emergency such as sudden start, sudden reverse, and sudden braking of the vehicle. In an emergency such as sudden braking, the elastic member 26 that supports the exhaust pipe 10 moves in the forward direction, and the front side stopper 31F provided with the central portion 27 of the elastic member 26 on the front side of the right and left side portions 18 and 19 of the holding member 16. Contact with. In an emergency such as sudden start, the elastic member 26 that supports the exhaust pipe 10 moves backward, and the central portion 27 of the elastic member 26 is provided on the rear side of the right and left side portions 18 and 19 of the holding member 16. It contacts the rear stopper 31R.
The front side stopper 31F and the rear side stopper 31R that restrict the movement of the elastic member 26 are made of band-shaped members formed of aramid fibers, and have a high temperature strength and are band-shaped. However, no abnormal noise is generated and wear can be suppressed.
In this way, the support device 13 for the exhaust pipe 10 is a front-side stopper that prevents the elastic member 26 that elastically supports the movement of the exhaust pipe 10 in the vertical direction and the horizontal direction from moving forward or backward in the vehicle. 31F and the rear stopper 31R are formed of a flexible band-shaped member, and spanned between the right and left side portions 18 and 19 of the holding member 16, so that the vertical direction of the exhaust pipe 10 with one elastic member 26 The movement in the three directions of the left and right direction and the front and rear direction can be restricted, and the structure can be simplified and the weight can be reduced as compared with the case where a stopper obtained by pressing a metal plate is welded to the holding member 16. .
Furthermore, the support device 13 for the exhaust pipe 10 can simplify manufacturing processes such as press working, welding, and painting, and can be easily manufactured.

The support device 13 for the exhaust pipe 10 is provided with front stoppers 31F and rear stoppers 31R on the right and left side portions 18 and 19 of the holding member 16 to restrict the movement of the elastic member 26 in the front-rear direction. By providing a pin extending to the elastic member 26 side on the 31F and the rear stopper 31R, it is possible to restrict the movement in the vertical direction and the horizontal direction as well as the front-rear direction.
Further, the support device 13 for the exhaust pipe 10 is provided with the front stopper 31F and the rear stopper 31R in the horizontal direction above the right and left side portions 18 and 19 of the holding member 16, but the height position and direction are changed. The stopper 31 can be provided at a position optimal for suppressing the movement of the exhaust pipe 10 and can be provided in the lower part of the right and left side parts 18 and 19 or in an oblique direction or a vertical direction instead of the horizontal direction. it can.

  The present invention provides a stopper that prevents the elastic member that elastically supports the vertical and lateral movements of the exhaust pipe from moving in the front direction of the vehicle. It restricts movement and can be applied to a device that elastically supports other members other than an exhaust pipe mounted on a vehicle.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Floor 4 Engine 10 Exhaust pipe 13 Support apparatus 14 Support member 15 Engagement part 16 Holding member 17 Bottom part 18 Right part 19 Left part 20 Space 21 Attachment member 22 Lower attachment member 23 Upper attachment member 24 Intermediate attachment member 26 Elasticity Member 27 Central part 28 Right side connection part 29 Left side connection part 30 Engagement hole 31 Stopper 31F Front side stopper 31R Rear side stopper 32/32 Right front side protrusion 33/33 Left front side protrusion 34/34 Right rear side protrusion 35/35 Left rear side Protrusion

Claims (4)

In an exhaust pipe support device, an exhaust pipe extending in the rearward direction of the vehicle is disposed below the vehicle body, and the exhaust pipe is elastically supported on the lower part of the vehicle body.
A support member having one end fixed to the exhaust pipe is provided, and the support member includes an engaging portion that extends horizontally in the front or rear direction of the vehicle on the other end.
A holding member attached to the lower part of the vehicle body in the vicinity of the exhaust pipe to which the support member is fixed is provided, and the holding member is U-shaped by a bottom portion extending in the left-right direction of the vehicle and right and left sides rising from the right and left ends of the bottom portion And is attached to the lower part of the vehicle body with the right and left side parts positioned in the left-right direction of the vehicle,
An elastic member that is held on the bottom surface of the holding member and the inner surfaces of the right and left side portions is provided, and the elastic member elastically supports the engaging portion of the support member in the vehicle vertical direction and the horizontal direction,
A support for an exhaust pipe, characterized in that a belt-shaped member stopper for preventing the elastic member from moving in the front direction of the vehicle is hung on at least the front side in the vehicle front-rear direction on the right and left sides of the holding member. apparatus. The elastic body includes a central portion located at the center of the space surrounded by the bottom portion of the holding member and the right and left side portions, and the central portion is connected to the inner surfaces of the bottom portion and the right and left side portions so as to move in the vertical direction and left and right directions. With right and left connecting parts that elastically support in the direction,
2. The exhaust pipe support device according to claim 1, wherein the central portion includes an engagement hole that extends in a horizontal direction toward the vehicle front-rear direction and engages with an engagement portion of the support member. .   The stopper is formed by integrating a front stopper provided on the front side in the vehicle front-rear direction of the right and left sides of the holding member and a rear stopper provided on the rear side of the right and left side of the holding member in the vehicle front-rear direction. The exhaust pipe support device according to claim 1 or 2, wherein the exhaust pipe support device has the structure described above.   The right and left side portions of the holding member include a pair of right front protrusions and left front protrusions that restrict the position of the front stopper on the front side, and a pair of right rear protrusions that restrict the position of the rear stopper on the rear side. The exhaust pipe support device according to claim 3, further comprising a left rear projection.

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