JP2001328441A - Exhaust mount structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve defectiveness, that is, the fall of a body part in an exhaust mount structured to connect the body part to a vehicle body mounting bracket by welding. SOLUTION: The vehicle body mounting bracket 10 is provided with a pair of spaced oblong holes 11, 11 in parallel, while a mounting metal fitting 50 of a body part 20 is provided with a pair of rising bent parts 12, 12 to be inserted in the oblong holes 11, 11, and a weld part V is provided at an intersection part between the vehicle body mounting bracket 10 and each rising bent part 12 piercing the oblong hole 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust mount structure, and more particularly, to a vehicle body in which a connecting portion for supporting a connecting portion of an exhaust pipe in an automobile is integrally formed with a rubber elastic body in a rectangular cylindrical mounting bracket. The present invention relates to an exhaust mount structure that is joined to a vehicle body mounting bracket fixed to a vehicle body by welding.

[0002]

2. Description of the Related Art A structure of this kind which has been conventionally known is as follows.
As shown in FIGS. 12 and 13, the main body 2 is connected to the vehicle body mounting bracket 1 by welding. The vehicle body mounting bracket 1 is a metal fitting formed by bending a flat plate-shaped body having mounting fixing bolt holes 3 and 3 at one end and a square hole 4 at the other end, by bending both sides. . Further, the main body 2 is formed by integrally molding a connecting portion 7 inside rubber mounting members 5 with rubber elastic bodies 6 and 6 interposed therebetween. The connecting portion 7 is provided with a through hole 8 through which a connecting portion of an exhaust pipe (not shown) is inserted.

[0003] The body mounting bracket 1 and the main body 2 are connected by mounting the vehicle body mounting bracket 1 on the upper surface of the main body 2 and at least two opposing sides of the square hole 4 on the inner surface of the square hole 4. And the mounting part 5 are connected by welding parts V, V.

[0004]

However, according to such a conventional exhaust mount structure, the welds V, V are provided at the intersection between the inner side surface of the square hole 4 and the upper surface of the mount fitting 5. When the load of the exhaust pipe is applied to the main body 2 and the exhaust pipe swings up and down or left and right to apply the force to the main body 2, a strong tensile force acts on the welded portions V and V. And the main body 2 falls off from the vehicle body mounting bracket 1.

[0005]

Therefore, in order to solve the above-mentioned problems, the present invention provides a pair of spaced long holes in parallel to the bracket for mounting the vehicle body instead of the square holes, while mounting brackets have these holes. A pair of upright bent portions to be inserted into the long hole is provided, and an intersection between the upright bent portion penetrating the long hole and the vehicle body mounting bracket is welded. Thus, even if the welded portion is broken, it can be prevented from stopping in the elongated hole and causing a wedge action, so that the main body portion is immediately dropped from the vehicle body mounting bracket.

When the vertical bent portion is inserted into the elongated hole and welded, the curved portion at the intersection of the vertical bent portion and the shoulder of the base portion abuts on the lower surface corner of the elongated hole so that the curved portion does not run up to form a gap. An angle of intersection θ between the upright bent portion and the shoulder, which is the base portion, is formed to be 90 degrees or less, and the bent portion is formed by pushing the bent portion inward of the mounting bracket, and the bent portion has a lower surface angle of the elongated hole. It is formed so as to be located away from the part.

Further, in order to prevent the vertical bent portion penetrating the long hole from easily falling off during the welding operation, the maximum distance between the vertical bent portions after the main body is formed is larger than the maximum distance between the pair of long holes, and The distance between the shoulders is equal to or smaller than the maximum distance between the pair of slots.

The mounting bracket may be a square pipe similar to the conventional one, and one side may be cut open to form a pair of upright bent portions. Is formed by bending a rectangular sheet metal formed at both ends into a symmetrical rectangular tube shape, and having a pair of upright bent portions opened by bending up the ear portions.

Further, the mounting bracket is formed by bending a rectangular sheet metal having ears to be formed with upright bent portions at both ends into a symmetrical rectangular tube shape, and bending the ears upright and following the shoulders. The main body may be formed integrally with the main body in a state in which the space between the pair of upright bent portions is larger than the space between the elongated holes.

In this case, when inserting the upright bent portion into the long hole, the main body is compressed to adjust the interval between the upright bent portions to the interval between the elongated holes, and after the insertion, the upright bending is performed by the reaction force of the main body itself. The portion slides against the inner surface of the elongated hole and becomes difficult to come off, and can be temporarily fixed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In the first embodiment of the present invention shown in FIGS. 1 and 2, a pair of elongated holes 11, 11 instead of the square holes 4 are formed in the vehicle body mounting bracket 10 in parallel. on the other hand,
The mounting bracket 50 forming the main body 20 has the long hole 1
The vertical bent portions 12 and 12 to be inserted into the first and the first 11 are formed. As shown in FIGS. 1 to 3, welding portions V, V are provided at intersections between the upright bent portions 12, 12 penetrating the elongated holes 11, 11 and the vehicle body mounting bracket 10, and the two are integrally joined. I do.

The construction of the vehicle body mounting bracket 10 is the same as that of the conventional one except for the long hole 11, but the mounting bracket 50 is formed by a sheet metal having a rectangular tube shape. That is,
It is formed by bending a sheet metal having ears to be the upright bent portions 12 at both ends of the rectangle, into a symmetrical rectangular tube shape. A connecting portion 7 integrally formed of rubber elastic bodies 6 and 6 is housed inside the main body 20 as in the related art. The upright bent portion 12 is formed to be bent perpendicularly from the shoulder portion 13.

According to this configuration, the welding portion V is applied to the intersection of the side surface of the upright bent portion 12 penetrating the elongated hole 11 and the vehicle body mounting bracket 10, so that the welding portion V is subjected to a compressive force rather than a tensile force. Therefore, even if it is broken, it is drawn into the long hole 11 side and closes the long hole 11 to generate a wedge action, thereby preventing the falling off of the upright bent portion 12.

Next, a second embodiment of the present invention shown in FIGS. 5 and 6 will be described. In the second embodiment, the mounting bracket 51 has a curved portion R formed at the intersection of the upright bent portion 12 and the shoulder portion 13 below the lower surface of the vehicle body mounting bracket 10 to be brought into contact with the shoulder portions 13, 13. It is inclined inward to be located. That is, the intersection angle θ between the upright bent portion 12 and the shoulder portion 13 is set to 90 degrees or less, and the bent portion R is slightly pushed inward of the main body portion 21. The vehicle body mounting bracket 10 is the same as the previous example.

Therefore, in this case, when the upright bent portion 12 is inserted into the elongated hole 11, as shown in FIG.
Although the gap S is formed apart from the lower corner 14 of the elongated hole 11, the vicinity 15 of the corner of the mounting bracket 51 comes into contact with the lower surface of the vehicle body mounting bracket 10, and the stable contact state of the main body 21. Can be obtained. With this configuration, in the first embodiment, since the lower surface corner 14 of the long hole 11 can be prevented from running on the curved portion R, the operation of chamfering the lower surface corner 14 of the long hole 11 can be performed. Can be omitted.

Next, a third embodiment of the present invention shown in FIGS. 7 and 8 will be described. In the third embodiment, the mounting bracket 52 includes the upright bent portion 12 and the shoulder portion 13 as in the second embodiment.
Is formed to be 90 degrees or less, and the curved portion R is inclined inward so as to be located below the lower surface of the vehicle body mounting bracket 10 to be brought into contact with the shoulder portions 13, 13. Unlike the two embodiments, the upright bent portions 12 and 12 have a configuration in which they are opposed to each other and inclined outward. The vehicle body mounting bracket 10 is the same as the previous example.

That is, as shown in FIGS. 9 and 10,
The relationship between the distance a between the shoulders 13, the maximum distance b between the elongated holes 11, and the maximum distance c between the upright bent parts 12, is a ≦ b <c. That is, the vertical bent portions 12, 1
2 is the maximum distance c between the long holes 11, 11 and the shoulder 1
It is assumed that the distance is larger than the distance a between 3 and 13. In the first and second embodiments, a = b = c.

With this configuration, as shown in FIG. 10, the outer side surface of the upright bent portion 12 slides against the inner side surface of the long hole 11 or comes into contact with the upper surface corner portion 16 of the long hole 11 to prevent it from falling off. It works. Therefore, in the first embodiment, when the vertical bent portion 12 penetrating the long hole 11 is welded, the vertical bent portion 12 comes off the long hole 11 carelessly (see FIG. 4). Body mounting bracket 10 using
It is necessary to perform an operation of connecting the main body 20 to the main body 20, but this operation can be omitted in the third embodiment.

Further, as a measure to prevent the standing bent portion 12 from accidentally falling out of the elongated hole 11, a main body 23 according to a fourth embodiment of the present invention shown in FIG.
The vertical bending portion 12 is formed so as to be in sliding contact with the inner surface of the elongated hole 11 by the reaction force itself. That is, the body mounting bracket 10 is the same as the previous example,
For the long hole 1
The rubber moldings 6 and 6 and the connecting portion 7 are formed in advance in a state where the opening is larger than the interval b between the first and the first 11.

Therefore, in this example, when the upright bent portion 12 is inserted into the elongated hole 11, both side wall portions are set so that the interval c 'between the upright bent portions 12, 12 becomes the interval a between the elongated holes 11, 11. 24, 24 are compressed by applying a force in the direction of the arrow. In this example, the gap a between the shoulders 13, 13 of the mounting bracket 53 before the molding of the main body 23, the vertical bending parts 12, 12
The relationship between the maximum distance c and the maximum distance b between the long holes 11 and 11 may be either a ≦ b <c or a = b = c,
The bending of the second and third embodiments may be used.

According to this configuration, since a deformation of the metal plate of the mounting bracket 50 forming the main body 23 and a reaction force due to the compression of the rubber moldings 6 and 6 are generated, the vertical bent portion 12 penetrating the elongated hole 11 is Has an effect of preventing the frictional resistance from accidentally falling off. Moreover, in this example, the rubber molded bodies 6 and 6 are pre-compressed, and there is an advantage that the durability is improved.

[0022]

According to the first aspect of the present invention, a welded portion is provided at the intersection of the pair of upright bent portions of the body portion penetrating the pair of elongated holes of the vehicle body mounting bracket and the vehicle body mounting bracket. Since the welded part is compressed, rather than pulled, the weld is applied. Even if the weld is broken, it is drawn into the slot and closes the slot, creating a wedge action. it can.

According to the second aspect of the present invention, in addition to the effect of the first aspect, a gap is formed in which the curved portion at the intersection of the upright bent portion and the shoulder rides on the lower surface corner of the long hole of the bracket for mounting the vehicle body. It can prevent it from causing damage,
The operation of chamfering the corner of the lower surface of the long hole can be omitted.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects, the side surfaces of the pair of upright bent portions of the main body portion passing through the pair of elongated holes of the bracket for mounting the vehicle body have the elongated holes. The main body can be prevented from falling off from the body mounting bracket by sliding on the side surface or abutting on the corner of the upper surface, and can be temporarily fixed until the main body is assembled to the body mounting bracket and then welded. The trouble that both are separated can be prevented, and the workability is improved because it is not necessary to fix the jig to the jig.

According to the invention described in claim 4, claims 1 to 1 are provided.
In addition to the effect of 3, the mounting bracket can be formed by bending a rectangular sheet metal to form a rectangular cylinder, so that the cost can be considerably reduced as compared with the case where a square pipe is used.

According to the fifth aspect of the present invention, the first to fifth aspects are provided.
In addition to the effect of 3, the elastic body is pre-compressed by compressing the main body, and the durability thereof is improved. In addition, since the mounting bracket can be formed by bending a rectangular sheet metal to form a rectangular cylinder, it is possible to considerably reduce costs as compared with the case where a square pipe is used.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is an essential part cross-sectional view showing a relationship between a vertical bent portion and a long hole in the first embodiment.

FIG. 4 is an explanatory cross-sectional view of a main part showing a relationship between a vertical bent portion and a long hole in the first embodiment.

FIG. 5 is a front view of a main body showing a second embodiment of the present invention.

FIG. 6 is a partial sectional front view of FIG. 5;

FIG. 7 is a front view showing a third embodiment of the present invention.

FIG. 8 is an assembly example diagram showing a partial cross section of FIG. 7;

FIG. 9 is a front view of a main body in a third embodiment.

FIG. 10 is a cross-sectional view showing a relationship between a vertical bent portion and a long hole in a third embodiment.

FIG. 11 is an exploded front view showing a fourth embodiment of the present invention.

FIG. 12 is a plan view of a conventional example.

FIG. 13 is a front view of FIG. 12;

[Explanation of symbols]

 V ... Welded part R ... Bent part 6 ... Rubber molded body 7 ... Connecting part 10 ... Body mounting bracket 11 ... Elongated hole 12 ... Standing part 13 ... Shoulder part 20,21,22,23 ... Main body part 50 ... Mount fitting 50, 51, 52, 53 ... Mounting bracket

Claims (5)

[Claims] 1. An exhaust mount structure in which a connecting portion for supporting a connecting portion of an exhaust pipe is integrally formed of a rubber elastic body inside a square-tube-type mounting bracket, and a main body is joined to a vehicle body mounting bracket by welding. In the vehicle body mounting bracket, a pair of long holes are opened, the mounting bracket is formed with a pair of upright bent portions that can be inserted into these long holes, and the upright bent portion penetrating the long hole and the vehicle body mounting bracket are formed. Exhaust mount structure characterized by a welded portion at the intersection. 2. The mounting bracket according to claim 1, wherein an angle of intersection θ between the upright bent portion and a shoulder as a base thereof is formed to be 90 degrees or less, and the bent portion at the intersection is directed inward of the mount fitting. An exhaust mount structure which is formed by pushing in, and the main body is formed by the mount fitting. 3. The method according to claim 1, wherein the maximum distance between the vertical bent portions after the molding of the main body is larger than the maximum distance between the pair of long holes, and the distance between the shoulder portions is the maximum distance between the pair of long holes. An exhaust mount structure characterized by being equal to or smaller than the interval. 4. The mounting bracket according to claim 1, wherein the mounting plate is formed by bending a rectangular sheet metal having ears on which both ends are to be formed with a vertical bent portion into a symmetrical rectangular tube shape, and mounting the ears. An exhaust mount structure characterized by standing up and forming a standing up section following the shoulder. 5. The mounting bracket according to claim 1, wherein the mounting metal part is formed by bending a rectangular metal plate having ear portions on which both ends are to be formed into a vertical bent portion into a symmetrical rectangular tube shape, and forming the ear portions. While standing up to form a standing bend following the shoulder,
When the main body is formed, it is formed with the gap between the pair of uprights being wider than the gap between the pair of long holes of the bracket for mounting the vehicle body, and when inserting the uprights into the long holes, the body is compressed and upright bent. Exhaust mount structure characterized by making the opening of the part small to match the gap between the long holes.