JP3691342B2 - Exhaust mount structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an exhaust mount structure, and in particular, a vehicle body attachment in which a main body portion formed by integrally forming a connecting portion for supporting a connecting portion of an exhaust pipe in an automobile with a rubber elastic body in a square tube mounting bracket is fixed to the vehicle body. The present invention relates to an exhaust mount structure that is connected to a bracket for welding by welding.
[0002]
[Prior art]
As shown in FIGS. 12 and 13, this type of structure that has been conventionally known has a main body 2 joined to a vehicle body mounting bracket 1 by welding. The vehicle body mounting bracket 1 is a metal fitting in which a plate-like body formed by drilling mounting fixing bolt holes 3 and 3 on one end side and a square hole 4 on the other end side is bent and reinforced on both sides. . The main body 2 is formed by integrally forming a connecting portion 7 inside a rectangular mounting bracket 5 via rubber elastic bodies 6 and 6. The connecting portion 7 is formed with a through hole 8 through which a connecting portion of an exhaust pipe (not shown) is inserted.
[0003]
The vehicle body mounting bracket 1 and the main body 2 are coupled to each other by placing the vehicle body mounting bracket 1 on the upper surface of the main body 2 and at least two sides of the square hole 4 opposite to each other. The crossing part with 5 was connected and comprised by welding part V, V.
[0004]
[Problems to be solved by the invention]
However, according to such a conventional exhaust mount structure, the welded portions V and V are applied to the intersecting portion between the inner surface of the square hole 4 and the upper surface of the mounting bracket 5, so that the load of the exhaust pipe is applied to the main body portion 2. When the exhaust pipe is swung up and down or left and right and the force is applied to the main body 2, the welded portions V and V are strongly damaged by the tensile force, and the main body 2 is There was a problem of falling off the mounting bracket 1.
[0005]
[Means for Solving the Problems]
Therefore, in order to solve the above problems, the present invention provides a pair of spaced long holes in parallel to the body mounting bracket instead of the square holes, while the mounting bracket has a pair of uprights to be inserted into the long holes. A bending portion is provided, and an intersecting portion between the vertical bending portion penetrating the long hole and the body mounting bracket is welded. Accordingly, even if the welded portion is damaged, it can be prevented that the main body portion is immediately dropped from the vehicle body mounting bracket by stopping in the elongated hole and causing a wedge action.
[0006]
In addition , when inserting the vertical bent part into the long hole and welding, the vertical part is bent so that the curved part at the intersection of the vertical bent part and the shoulder abuts against the lower corner of the long hole and does not form a gap. The crossing angle θ between the shoulder and the shoulder is formed to be 90 degrees or less, and the curved portion is formed by pushing inward of the mounting bracket so that the curved portion is located away from the bottom corner of the long hole. Form.
[0007]
Further, in order to prevent the standing bent part that has penetrated the long hole during welding operation from easily falling off, the maximum interval dimension of the standing bent part after forming the main body part is larger than the maximum interval of the pair of long holes and the shoulder part. The distance between the holes is equal to or smaller than the maximum distance between the pair of slots.
[0008]
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 standing bent parts. It is assumed that the rectangular sheet metal formed in the above is bent into a left-right symmetric rectangular tube shape and provided with a pair of standing bent portions opened by standing and bending the ear portion.
[0009]
In addition, the mounting bracket bends the rectangular sheet metal with the ears that should form the standing bends at both ends into a rectangular tube shape that is symmetrical to the left and right, and forms the standing bends that follow the shoulders by standing up the ears In addition, the main body portion may be integrally formed in a state where the interval between the pair of standing bent portions is larger than the interval between the long holes.
[0010]
In this case, when inserting the vertical bending part into the long hole, compress the main body part so that the interval dimension of the vertical bending part matches the interval dimension of the long hole, and after insertion, the vertical bending part is long due to the reaction force of the main body part itself. It is difficult to come out by sliding on the inner surface of the hole and can be temporarily fixed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the first embodiment of the present invention shown in FIGS. 1 and 2, a pair of long holes 11, 11 instead of the square holes 4 are opened in parallel in the vehicle body mounting bracket 10. On the other hand, upright bent portions 12 and 12 to be inserted into the long holes 11 and 11 are formed in the mount metal fitting 50 forming the main body portion 20. As shown in FIGS. 1 to 3, welded portions V, V are applied to the intersections between the vertical bent portions 12, 12 penetrating the long holes 11, 11 and the vehicle body mounting bracket 10, and the two are integrally coupled. To do.
[0012]
The vehicle body mounting bracket 10 is the same as the conventional one except for the long hole 1, but the mounting bracket 50 is formed by using a sheet metal as a rectangular tube. That is, a sheet metal in which ears to be raised portions 12 are formed on both side end portions of a rectangle is formed in a rectangular tube shape having an opening at the center of the upper surface by bending left and right symmetrically. Inside, a connecting portion 7 formed integrally with rubber bullets 6 and 6 is housed in the same manner as in the prior art to constitute a main body portion 20. The vertical bending portion 12 of the mount metal fitting 50 is formed to be bent perpendicularly from the shoulder portion 13.
[0013]
With this configuration, the welded portion V is applied to the intersection between the side surface of the upright bent portion 12 penetrating the long hole 11 and the vehicle body mounting bracket 10, so that the compressive force acts on the welded portion V rather than the tensile force. Therefore, even if it is destroyed, it is drawn into the long hole 11 side and closes the long hole 11 to cause a wedge action to prevent the vertical bending portion 12 from falling off.
[0014]
Next, a second embodiment of the present invention shown in FIGS. 5 and 6 will be described. In this second embodiment, the mounting bracket 51 has a curved portion R formed at the intersection of the standing bent portion 12 and the shoulder portion 13 below the lower surface of the vehicle body mounting bracket 10 that should contact the shoulder portions 13, 13. It is inclined inward so as to be located. That is, the crossing angle θ between the standing bent portion 12 and the shoulder portion 13 is formed to be 90 degrees or less, and the curved portion R is slightly pushed inward of the main body portion 21. The body mounting bracket 10 is the same as the previous example.
[0015]
Therefore, in this case, when the upright bent portion 12 is inserted into the long hole 11, the curved portion R is separated from the lower surface corner portion 14 of the long hole 11 as shown in FIG. The vicinity 15 of the corner portion comes into contact with the lower surface of the vehicle body mounting bracket 10, and a stable contact state of the main body portion 21 can be obtained. With this configuration, in the first embodiment, the lower surface corner portion 14 of the long hole 11 can be prevented from riding on the curved portion R, so that the lower surface corner portion 14 of the long hole 11 is chamfered. With the advantage that can be omitted.
[0016]
A third embodiment of the present invention shown in FIGS. 7 and 8 will be described. In the third embodiment, the mount fitting 52 is formed so that the crossing angle θ between the standing bent portion 12 and the shoulder portion 13 is 90 degrees or less as in the second embodiment, and the curved portion R contacts the shoulder portions 13 and 13. In contrast to the second embodiment, the upright bent portions 12 and 12 are configured to be inclined in the outward direction opposite to each other, while being inclined inward so as to be positioned below the lower surface of the power vehicle mounting bracket 10. The body mounting bracket 10 is the same as the previous example.
[0017]
That is, as shown in FIG. 9 and FIG. 10, regarding the relationship among the distance a between the shoulder portions 13 and 13, the maximum interval b between the long holes 11 and 11, and the maximum interval c between the standing bent portions 12 and 12, a ≦ Let b <c. In other words, the maximum interval c between the upright bent portions 12 and 12 is greater than the maximum interval b between the long holes 11 and 11 and the interval a between the shoulder portions 13 and 13. Incidentally, in the first and second embodiments, a = b = c.
[0018]
With this configuration, as shown in FIG. 10, the outer side surface of the upright bent portion 12 is in sliding contact with the inner side surface of the long hole 11, or comes into contact with the upper surface corner 16 of the long hole 11. . Therefore, in the first embodiment, when the vertical bending portion 12 penetrating the long hole 11 is welded, the vertical bending portion 12 is carelessly dropped from the long hole 11 (see FIG. 4). However, in this third embodiment, it is possible to omit this.
[0019]
Furthermore, as a measure for preventing the vertical bending portion 12 from inadvertently falling off the long hole 11, the main body portion 23 according to the fourth embodiment of the present invention shown in FIG. By having it, the vertical bending portion 12 is formed so as to be in sliding contact with the inner surface of the long hole 11. That is, the vehicle body mounting bracket 10 is the same as the previous example, and the main body portion 23 is opened in the state where the interval dimension c ′ of the upright bent portions 12 and 12 is opened larger than the interval dimension b of the long holes 11 and 11. The rubber molded bodies 6 and 6 and the connecting portion 7 are formed in advance.
[0020]
Therefore, in this example, when inserting the upright bent portion 12 into the long hole 11, both side wall portions 24, 24 are set so that the interval dimension c ′ of the upright bent portions 12, 12 becomes the interval dimension a of the long holes 11, 11. Apply force in the direction of the arrow to compress. In this example, the distance a between the shoulder portions 13 and 13 of the mounting bracket 53 before the body portion 23 is molded, the maximum distance c between the standing bent portions 12 and 12, and the maximum distance b between the long holes 11 and 11 are as follows. Regarding the relationship, a ≦ b <c, a = b = c, or the bending of the second and third embodiments may be used.
[0021]
With this configuration, a reaction force is generated due to deformation of the metal plate of the mounting metal 53 forming the main body 23 and compression of the rubber molded bodies 6, 6, so that the vertical bending portion 12 penetrating the long hole 11 is the inner surface of the long hole 11. The frictional resistance prevents the frictional resistance from inadvertently dropping off. Moreover, in this example, the rubber molded bodies 6 and 6 are pre-compressed, which has the advantage that the durability is improved.
[0022]
【The invention's effect】
According to the first aspect of the present invention, the welded portion is provided at the intersection of the side surface of the pair of upright bent portions of the main body portion penetrating the pair of elongated holes of the body mounting bracket and the body mounting bracket. A compressive force rather than a tensile force acts, and even if it is destroyed, a wedge action is generated by being pulled into the long hole side and closing the long hole, so that the vertical bending portion can be prevented from falling off.
[0023]
In addition, it is possible to prevent the bent portion at the intersection of the vertical bent portion and the shoulder from running over the lower surface corner of the long hole of the mounting bracket for the vehicle body and causing damage, and to prevent the bottom surface angle of the long hole. The work of chamfering the part can be omitted.
[0024]
According to the second aspect of the present invention, in addition to the effect of the first aspect, the side surfaces of the pair of upright bent portions of the main body portion penetrating the pair of long holes of the vehicle body mounting bracket are in sliding contact with the side surfaces of the long holes. The main body can be prevented from falling off the body mounting bracket by abutting against the top corner, and the two parts can be separated by temporarily securing the main body until it is welded after being assembled to the body mounting bracket. Since it is not necessary to fix to a jig | tool, workability | operativity improves.
[0025]
According to the third aspect of the present invention, in addition to the effects of the first and second aspects, the mounting bracket can be formed into a rectangular tube shape by bending a rectangular metal plate. Cost reduction is possible.
[0026]
According to invention of Claim 4 , in addition to the effect of Claims 1-3, by compressing a main-body part, an elastic body is pre-compressed and the durability improves. Further, since the mounting bracket can be formed into a rectangular tube by bending a rectangular metal plate, the cost can be considerably reduced as compared with the case of using a rectangular pipe.
[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.
FIG. 3 is a cross-sectional view of a main part showing a relationship between a vertical bending portion and a long hole in the first embodiment.
FIG. 4 is a cross-sectional explanatory view of a main part showing a relationship between a vertical bending part and a long hole in the first embodiment.
FIG. 5 is a front view of a main body portion showing a second embodiment of the present invention.
6 is a partial cross-sectional front view of FIG. 5;
FIG. 7 is a front view showing a third embodiment of the present invention.
8 is an assembly example diagram with a partial cross-section of FIG. 7;
FIG. 9 is a front view of the main body in the third embodiment.
FIG. 10 is a cross-sectional view showing the relationship between a vertical bending portion and a long hole in the 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.
13 is a front view of FIG.
[Explanation of symbols]
V ... welded portion R ... bent portion 6 ... rubber molded body 7 ... connecting portion 10 ... body mounting bracket 11 ... long hole 12 ... vertical bent portion 13 ... shoulder portions 20, 21, 22, 23 ... main body portion 50 ... mount bracket 50, 51, 52, 53 ... Mount bracket

Claims (4)

The main body portion formed by integrally forming a connecting portion for supporting the connecting portion of the exhaust pipe inside the rectangular mounting metal fitting having an opening at the center of the upper surface assembled to the body mounting bracket with a rubber elastic body is the bracket. In the exhaust mount structure that is joined to the mounting bracket, the mounting bracket is provided with a bent portion bent from the shoulders on both sides of the opening, and a pair of long lengths through which the bent portion can be inserted into the body mounting bracket. It is an exhaust mount structure in which a hole is opened and a welded part is applied to the intersection of the vertical bending part penetrating the long hole and the vehicle body mounting bracket,
The mounting bracket is formed by forming the intersecting angle θ between the vertical bent portion and the shoulder portion to be 90 degrees or less, and pushing the bent portion at the intersection into the mounting bracket, and the mounting bracket forms the main body. Exhaust mount structure characterized by that. In claim 1,
Exhaust characterized in that 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 shoulder portions is equal to or smaller than the maximum distance between the pair of long holes. Mount structure. In claim 1 or 2,
The mounting bracket is formed by bending a rectangular metal plate with ears at both ends to form a vertical bent part into a symmetrical rectangular tube shape, and forming a vertical bent part following the shoulder by standing up the ear part. Exhaust mount structure characterized by In claim 1, 2 or 3,
The mounting bracket bends a rectangular sheet metal with ears that should form upright bends at both ends into a symmetrical rectangular tube shape, and forms the upright bends that follow the shoulders by standing up the ears When molding the main body, the pair of vertical bent parts is molded with the gap between the pair of elongated holes in the body mounting bracket being larger than the distance between the pair of long holes. Exhaust mount structure characterized in that the opening of the bent part is reduced to match the interval between the long holes.

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