JP2005146889A - Exhaust muffler support part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve easiness of layout of exhaust system by preventing interference of an exhaust muffler with other members by movement thereof and suppress deterioration of mount rubber due to heat without increasing the number of parts. <P>SOLUTION: Both exhaust muffler side brackets 2 are fixed to the exhaust muffler 1 with forming a predetermined gap "h" with a rear surface of the exhaust muffler 1 and are composed of a vertical surface 23a provided with both exhaust muffler side support pins 22 and vehicle fore-aft direction surfaces 23b bent and formed rearward from an inner side edge part of the vertical surface 23a. The vertical surface 23a is arranged between a rear surface of the exhaust muffler 1 and mount rubber 4 respectively. The vehicle fore-aft direction surface 23b is arranged between a mount rubber 4 and a tail tube 13 connected to a rear surface of the exhaust muffler 1. The vehicle fore-aft direction surface 23b is arranged to regulate movement of the exhaust muffler 1 by making one of mount rubbers 4 abut on the vehicle fore-aft direction surface 23b when the exhaust muffler 1 moves in up and down and left and right direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a structure for supporting an exhaust muffler interposed in an exhaust system.

  Conventionally, as a structure for supporting a vehicle body of an exhaust muffler interposed in an exhaust system, for example, as shown in FIG. 8, vehicle body side support pins 102, 102 provided in the left and right positions of a vehicle body floor 101 are provided. Vehicle-side brackets 103, 103 provided, exhaust muffler-side brackets 106, 106 having vehicle front-rear exhaust muffler-side support pins 105, 105 provided at the left and right positions of the exhaust muffler 104, and both vehicle-body-side support pins A structure provided with left and right mount rubbers 107 and 107 that are symmetrically arranged in a reverse C-shape by changing the distance between 102-102 and the support pins 105-105 on the exhaust muffler side. It has become.

JP 2000-2113 (Specification (page 1), FIG. 1) JP 2002-160536 A (page (5) of the specification, FIG. 4)

  However, in the conventional support structure, when there is a large up / down and left / right direction input while the vehicle is running and the exhaust muffler 104 moves up / down and left / right, the left and right mount rubbers 107, 107 are located above and below the exhaust muffler 104. The exhaust muffler 104 moves up and down and in the left and right directions and interferes with other members such as the vehicle body floor 101 because it rotates around the vehicle body side support pins 102 and 102 according to the left and right movement without any restriction. Since there is a concern, it is necessary to determine the arrangement of the brackets in the entire exhaust system in order to suppress the movement amount of the exhaust muffler 104, and thus there is a problem that the layout of the exhaust system is difficult.

  Further, since the exhaust muffler 104 and the exhaust pipe have a high surface temperature, there is a risk of deteriorating both the mounting rubbers 107 and 107 disposed in the vicinity of these exhaust systems. It is necessary to provide a heat shield as a component to cut off heat. Therefore, the increase in the number of components increases the cost and causes a reduction in layout flexibility.

  The problem to be solved by the present invention is that the layout of the exhaust system can be improved by preventing interference with other members due to the movement of the exhaust muffler, and the mount rubber by heat without increasing the number of parts. An object of the present invention is to provide a support structure for an exhaust muffler that can suppress deterioration.

  In order to solve the above-mentioned problem, the exhaust muffler support structure according to claim 1 includes a vehicle body side bracket having a vehicle body side support pin provided on the vehicle body floor, and a rear or front or left or right position provided on the exhaust muffler. The exhaust muffler side bracket having the exhaust muffler side support pins projecting forward, and the distance between the two vehicle body side support pins and the distance between the two support pins on the exhaust muffler side are made opposite to each other in a symmetrical manner. The left and right mount rubbers are inclined and arranged in a C shape, and both the exhaust muffler side brackets are fixed to the exhaust muffler in a state where a predetermined gap is formed between the rear surface or the front surface of the exhaust muffler. And a board part provided with both exhaust muffler side support pins, and a bent part formed from the inner side edge part of the board part toward the rear or front of the exhaust muffler. And the two substrate portions are respectively disposed between the rear surface or front surface of the exhaust muffler and the left and right mounting rubbers, and the bent plate portions are connected to the rear surface or front surface of the exhaust muffler. The exhaust pipe is disposed between the left and right mounting rubbers, and when the exhaust muffler moves in the vertical and horizontal directions, either one of the left and right mounting rubbers abuts the bent plate portion. The bi-fold plate portion is arranged so that the movement amount of the exhaust muffler is regulated.

  In the exhaust muffler support portion structure according to claim 1, as described above, both the exhaust muffler side brackets are constituted by the substrate portion and the bent plate portion, and both the substrate portions are the rear or front surface of the exhaust muffler and the left and right mounts. The two muffler side brackets are arranged between the left and right mounting rubber and the exhaust pipe connected to the rear or front of the exhaust muffler. It serves as a heat shield, and this makes it possible to suppress deterioration of the mount rubber due to heat without increasing the number of components.

  Further, when the exhaust muffler moves in the up / down / left / right direction, the double folding plate portion is arranged so that the amount of movement of the exhaust muffler is regulated by one of the left and right mounting rubbers coming into contact with the bending plate portion. Therefore, the bent plate serves as an anti-sway stopper for the exhaust muffler, which prevents interference with other members due to the movement of the exhaust muffler. Can be raised.

  Embodiments of the present invention will be described below with reference to the drawings.

The support structure of the exhaust muffler of this embodiment corresponds to the invention described in claims 1 and 2.
First, the exhaust muffler support structure of this embodiment will be described with reference to the drawings.
FIG. 1 is a rear view of the exhaust muffler support structure of this embodiment, FIG. 2 is a plan view of the main part, FIG. 3 is a side view of the main part, and FIG. 4 is an arrow A view of FIG. FIG. 5 is an enlarged view as viewed in the direction of the arrow B in FIG. 4, FIG. 6 is an enlarged view as seen in the direction of the arrow C in FIG. 4, and FIG.

  The exhaust muffler support structure of this embodiment includes an exhaust muffler 1, a pair of left and right exhaust muffler side brackets 2 and 2 fixed to the back of the exhaust muffler 1, and a pair of left and right vehicle body side brackets provided on the vehicle body side. 3 and 3, and a pair of left and right mount rubbers 4 and 4 which are interposed between the vehicle body side brackets 3 and 3 and the exhaust muffler side brackets 2 and 2 and elastically support the exhaust muffler 1 with respect to the vehicle body. As a major component.

More specifically, the exhaust muffler 1 has an outer shell 11 having a substantially triangular cross section, and a tail tube (exhaust pipe) 13 disposed at the center of the rear outer plate 12.
The mounting rubbers 4 and 4 have support pin insertion holes 42 and 42 formed at both ends in the longitudinal direction of a substantially elliptical elastic rubber body 41, and a substantially H-shaped hole 43 formed at an intermediate part. It has a structure.

  Each of the exhaust muffler side brackets 2 has a mounting base portion 21 formed in a substantially U-shaped cross section, and both sides 21a and 21a of the mounting base portion 21 are connected to the inner peripheral standing portion 12a of the outer plate 12. A large gap h is formed between the outer plate 12 and a vertical surface 23a (described later) by welding and fixing in a state of being in contact with and locked to the peripheral surface (see FIGS. 4 to 6). .

  Further, a concave portion 21c having a semicircular cross section extending in the vehicle front-rear direction is formed in the central side 21b of the mounting base portion 21, and the base portion of the exhaust muffler side support pin 22 is welded and fixed along the concave portion 21c. Has been. The exhaust muffler side support pin 22 has a guide surface whose diameter gradually increases from a diameter smaller than the inner diameter of the support pin insertion hole 42 formed in the mount rubber 4 at the front end (rear end of the vehicle), and an insertion A guide stopper 22 a having a larger diameter than the inner diameter of the hole 42 and the outer diameter of the exhaust muffler side support pin 22 is provided.

  Further, a vertical surface (substrate portion) 23a for closing the rear end portion is extended from the opening side edge portion of the vertical surface 23a toward the rear of the vehicle at the rear end edge portion of the mounting base portion 21. A heat shield plate portion 23 that also serves as a stopper having a substantially L-shaped cross section is integrally formed with the vehicle longitudinal direction surface (bent plate portion) 23b. And in the state which attached the mounting base part 21 with respect to the outer plate 12, the said left-right both vehicle front-back direction surfaces 23b and 23b are each formed in the inclined shape so that it may become reverse C shape seeing from the vehicle rear. .

  Further, three ribs 24 and 25 are respectively formed on the opposing surface of the vertical surface 23a and the vehicle front-rear direction surface 23b by press molding. The ribs 24 and 25 serve to reinforce the heat shield plate portion 23 that also serves as a stopper, and to increase the heat radiation area and reduce the contact area with the mount rubber 4.

  As shown in FIG. 7, each of the vehicle body side brackets 3, 3 has a base portion fixed to the vehicle body floor 5 side, and a vehicle body side support pin 31 that extends in the vehicle front-rear direction at the front end portion thereof. Similar to the exhaust muffler side support pin 22, the vehicle body side support pin 31 gradually starts from a diameter smaller than the inner diameter of the support pin insertion hole 42 formed in the mount rubber 4 at the tip end portion (vehicle rear end portion). A guide surface having an enlarged diameter, and a guide stopper 31 a having a diameter larger than the inner diameter of the insertion hole 42 and the outer diameter of the vehicle body side support pin 31 are provided.

  The distance between the left and right vehicle body side support pins 31-31 is wider than the distance between the left and right exhaust muffler side support pins 22-22. In a state where the side support pins 31 and the exhaust muffler side support pins 22 are respectively inserted, the left and right mount rubbers 4 and 4 are respectively connected to the vehicle front and rear direction surfaces 23b and 23b in the heat shield plates 23 and 23 that also serve as both stoppers The tips of the three ribs 25 in the heat shield plate 23 that also serves as a stopper are brought into contact with the outer surfaces of the mount rubbers 4, 4. ing.

  Further, when the exhaust muffler 1 moves by a predetermined amount in the vertical and horizontal directions, the movement of the exhaust muffler 1 is caused by either one of the left and right mount rubbers 4 or 4 coming into contact with the vehicle front-rear direction surface 23b of the heat shield plate portion 23. The positional relationship of the vehicle front-rear direction surface 23b is set so that the amount is regulated.

Next, the operation and effect of this embodiment will be described.
In the exhaust muffler support portion structure of this embodiment, as described above, the mounting base portion 21 of both the exhaust muffler side brackets 2 includes the vertical surface (substrate portion) 23a and the vehicle front-rear direction surface (folded plate portion) 23b. And each vertical surface (substrate portion) 23a is disposed between the rear surface of the outer plate 12 and the left and right mount rubbers 4 and 4 in the exhaust muffler 1, respectively, and front and rear of each vehicle. Since the directional surface (folded plate portion) 23b is arranged between the exhaust pipe 13 and the left and right mount rubbers 4, 4, each muffler side bracket 2 shields heat from the exhaust muffler 1 and the tail tube 13. This serves as a heat shield, and it is possible to suppress the deterioration of the mount rubbers 4 and 4 due to the heat of the exhaust muffler 1 and the exhaust pipe 13 without increasing the number of parts. Cormorants effect can be obtained. (Corresponding to claim 1).

In addition, as shown in the operation explanatory diagram of FIG. 7, if there is a large vertical and horizontal input while the vehicle is running, the exhaust muffler is centered on the vehicle body side support pins 31, 31 from the stop state of FIG. 1 moves up and down, left and right (swings in the right direction in the figure (B)), but when the exhaust muffler 1 moves (swings) by a predetermined amount in the top, bottom, left and right directions, as shown in the figure (B). In addition, one of the left and right mount rubbers 4 and 4 (the right side in FIG. 7 that is the swinging direction) is in contact with the vehicle front-rear direction surface (bending plate portion) 23b of the heat shield plate portion 23. Thus, the movement (swing) of the exhaust muffler 1 is stopped.
Accordingly, the front-rear direction surfaces (bending plate portions) 23b, 23b of both vehicles serve as anti-sway stoppers for the exhaust muffler 1, thereby preventing interference with other members due to movement of the exhaust muffler 1. Therefore, it is possible to improve the layout of the exhaust system. (Corresponding to claim 1).

  In addition, since the three ribs 24 and 25 protrude from the opposing surface of the vertical surface 23a and the vehicle front-rear direction surface 23b by press molding, not only the rigidity is improved but also the heat dissipation is improved. Therefore, the contact area with the mount rubbers 4 and 4 can be reduced, so that the effect of suppressing the deterioration of the mount rubbers 4 and 4 due to heat can be further enhanced. (Corresponding to claim 2).

Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.
For example, in this embodiment, the exhaust muffler is disposed in the vehicle front-rear direction, but can be disposed in the vehicle width direction or in an oblique direction.
Further, in this embodiment, an example in which the exhaust muffler is supported on the rear surface side is shown, but the exhaust muffler may be supported on the front surface side.

It is a figure from the vehicle rear which shows the support part structure of the exhaust muffler of an Example. It is a top view of the principal part which shows the support part structure of the exhaust muffler of an Example. It is a side view of the principal part which shows the support part structure of the exhaust muffler of an Example. It is A arrow enlarged view of FIG. FIG. 5 is an enlarged view taken in the direction of arrow B in FIG. It is C arrow enlarged view of FIG. It is action explanatory drawing in a use condition. It is a figure from the vehicle rear which shows the support part structure of the exhaust muffler of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exhaust muffler 11 Outer shell 12 Outer plate 12a Outer peripheral standing part 13 Tail tube (exhaust pipe)
2 Exhaust muffler side bracket 21 Mounting base portion 21a Side side 21b Central side 21c Recess 22 Exhaust muffler side support pin 22a Guide stopper 23 Heat shield plate portion 23a Vertical surface (substrate portion)
23b Vehicle front-rear direction surface (bent plate)
24 Rib 25 Rib 3 Car body side bracket 31 Car body side support pin 31a Guide stopper 4 Mount rubber,
41 elastic rubber body 42 support pin insertion hole 43 hole 5 body floor h gap

Claims (2)

A vehicle body side bracket having a vehicle body side support pin provided on the vehicle body floor;
An exhaust muffler side bracket having an exhaust muffler side support pin projecting rearward or forward provided at a rear surface or a front left / right position of the exhaust muffler;
The left and right mounting rubbers are arranged symmetrically in the shape of an inverted C by making the distance between the two vehicle body side support pins different from the distance between the two support pins on the exhaust muffler side,
A substrate portion having both the exhaust muffler side brackets fixed to the exhaust muffler in a state where a predetermined gap is formed between the rear surface or the front surface of the exhaust muffler and the both exhaust muffler side support pins; A bent plate portion that is bent toward the rear or front of the exhaust muffler from the inner side edge of the portion,
The two substrate portions are respectively disposed between the rear surface or front surface of the exhaust muffler and the left and right mount rubbers, and the two bent plate portions are connected to the rear surface or front surface of the exhaust muffler, and It is placed between the left and right mount rubber,
When the exhaust muffler moves in the up / down / left / right direction, either one of the left and right mount rubbers abuts on the bent plate portion so that the movement amount of the exhaust muffler is regulated. An exhaust muffler support part structure, wherein:   2. The exhaust muffler support portion structure according to claim 1, wherein the exhaust gas muffler side bracket includes a base plate portion and a bent plate portion that is bent backward or forward from an inner side edge portion of the base plate portion. A structure for supporting an exhaust muffler, in which a plurality of ribs are formed by pressing on both opposing surfaces.

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