JP2020157949A - Exhaust mount - Google Patents

Abstract

To provide an exhaust mount having a novel structure, which ensures sufficient durability while achieving both stable support of an exhaust pipe and excellent vibration isolation performance by its compact structure.SOLUTION: There is provided an exhaust mount 10, in which a plurality of insertion holes 14 through which a mounting pin 28 on the vehicle body 24 side extending from the vehicle body 24 and a mounting pin 30 on the exhaust pipe 26 side extending from the exhaust pipe 26 are inserted are provided on a rubber elastic body 12 of the main body, and the rubber elastic body 12 of the main body interposes between the vehicle body 24 and the exhaust pipe 26 so as to support the exhaust pipe 26 in a suspended state with respect to the vehicle body 24 while preventing vibration. In a section of the rubber elastic body 12 of the main body that forms a peripheral wall of the insertion hole 14, a reinforcing member 22 is provided at a position away from the insertion hole 14 in the vertical direction. The reinforcing member 22 is arranged so as to cover the entire surface of the insertion hole 14 in the radial direction from outside in the vertical direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to an exhaust mount that supports a vehicle body with vibration isolation of an exhaust pipe.

Conventionally, an exhaust mount has been known in which an exhaust pipe is suspended from a vehicle body to support vibration isolation. As for the exhaust mount, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-032893 (Patent Document 1), mounting holes are formed on both sides of the anti-vibration rubber in the vertical direction, and the mounting holes are formed on the vehicle body side and the exhaust. By attaching each one on the pipe side, the exhaust pipe is vibration-proof connected to the vehicle body in a suspended state.

By the way, in the anti-vibration rubber of Patent Document 1, the support load and the vibration load of the exhaust pipe are mainly input in the vertical direction with respect to the mounting hole. Therefore, the anti-vibration rubber has a large static spring constant in the vertical direction to stably support the exhaust pipe, and a small dynamic spring constant in the vertical direction to make it difficult for the vibration of the exhaust pipe to be transmitted to the vehicle body. However, both are required.

Japanese Unexamined Patent Publication No. 7-032893

However, as a result of the study by the present inventor, it has become clear that it is difficult to realize both the hard static spring characteristic and the soft dynamic spring characteristic in the main body rubber elastic body constituting the exhaust mount. It was. That is, if the elastic body of the main body is made of hard rubber to increase the static spring constant, the dynamic spring constant also increases, which adversely affects the vibration isolation performance at the time of vibration input. If the elastic body of the main body is made of soft rubber and the dynamic spring constant is reduced, the static spring constant is also reduced, which makes it difficult to stably support the exhaust pipe. In order to obtain a large static spring constant of the main body rubber elastic body while forming the main body rubber elastic body with soft rubber, it is necessary to increase the rubber volume of the main body rubber elastic body, so increasing the size of the exhaust mount is a problem. become. Moreover, local stress concentration is likely to occur on the main body rubber elastic body, and if the main body rubber elastic body is formed of soft rubber, it is difficult to secure the durability of the main body rubber elastic body.

An object of the present invention is to provide an exhaust mount having a novel structure in which sufficient durability is ensured while achieving both stable support of an exhaust pipe and excellent anti-vibration performance due to a compact structure. ..

Hereinafter, preferred embodiments for grasping the present invention will be described, but each of the embodiments described below is described as an example, and not only can be appropriately combined with each other and adopted, but also described in each embodiment. The plurality of components of the above can be recognized and adopted independently as much as possible, and can be appropriately adopted in combination with any of the components described in another embodiment. Thereby, in the present invention, various other aspects can be realized without being limited to the aspects described below.

In the first aspect, the main body rubber elastic body is provided with a plurality of insertion holes through which a mounting pin on the vehicle body side extending from the vehicle body and a mounting pin on the exhaust pipe side extending from the exhaust pipe are inserted. An exhaust mount in which the main body rubber elastic body is interposed between the vehicle body and the exhaust pipe to support the exhaust pipe in a suspended state with respect to the vehicle body, and is the main body rubber elastic body. In the portion constituting the peripheral wall of the insertion hole, a reinforcing member is provided at a position away from the insertion hole in the vertical direction, and the reinforcing member covers the entire radial direction of the insertion hole outward in the vertical direction. It is arranged so as to cover it.

According to the exhaust mount having a structure according to this aspect, the peripheral wall of the insertion hole is deformed with respect to the vibration input in the vertical direction because the reinforcing member is provided on the outer portion of the peripheral wall of the insertion hole in the vertical direction. The amount is reduced. Further, since the force is transmitted to a wider area of the main body rubber elastic body by the reinforcing member, the stress is dispersed in the main body rubber elastic body, and the durability of the main body rubber elastic body is improved.

By improving the durability of the main body rubber elastic body, the main body rubber elastic body can be formed of a rubber material having a lower rubber hardness. Therefore, the dynamic spring constant of the rubber elastic body of the main body can be set small, and the vibration isolation performance can be improved.

Even if the main body rubber elastic body is made of a rubber material with low rubber hardness, the amount of deformation of the outer part in the vertical direction on the peripheral wall of the insertion hole is limited by the reinforcing member, so that the static spring of the main body rubber elastic body It is possible to prevent the constant from becoming small. Therefore, the exhaust pipe can be stably supported.

Since the static spring constant is increased by providing a reinforcing member, it is not necessary to increase the size of the rubber elastic body of the main body in order to increase the static spring constant, and the exhaust mount has a large static spring constant and a small dynamic spring constant. Is realized compactly.

The second aspect is the exhaust mount described in the first aspect with respect to both the insertion hole through which the mounting pin on the exhaust pipe side is inserted and the insertion hole through which the mounting pin on the vehicle body side is inserted. Therefore, the reinforcing member is provided on each outer side in the vertical direction.

According to the exhaust mount having a structure according to this aspect, since the reinforcing members are provided on both sides of the rubber elastic body in the vertical direction, the static spring constant can be further increased in the vertical direction and the dynamic spring constant can be increased. The spring constant can be made smaller. In addition, the durability and compactness of the rubber elastic body of the main body are also realized more advantageously.

In the third aspect, in the exhaust mount described in the first or second aspect, connecting portions are provided on both sides of the main body rubber elastic body in the width direction, which is the radial direction of the insertion hole. The reinforcing member extends outward in the vertical direction of the connecting portions.

According to the exhaust mount having a structure according to this aspect, the vertical force input to the insertion hole is transmitted to a wider range of the connecting portion via the reinforcing member, so that the connecting portion has a wider range. Elastically deforms. As a result, the static spring constant in the vertical direction of the rubber elastic body of the main body including the connecting portion is increased, strain is dispersed in the connecting portion, and the durability of the connecting portion is improved.

In the fourth aspect, in the exhaust mount described in any one of the first to third aspects, the reinforcing member has a flat plate shape.

According to the exhaust mount having a structure according to this aspect, even if the reinforcing member is arranged outward in the vertical direction of the insertion hole, the body rubber elastic body can be prevented from increasing the vertical dimension of the exhaust mount. A free length can be secured in the vertical direction. As a result, the compact structure can further improve durability and anti-vibration performance.

According to the present invention, in the exhaust mount, it is possible to secure sufficient durability while achieving both stable support of the exhaust pipe and excellent vibration isolation performance due to the compact structure.

Perspective view showing an exhaust mount as the first embodiment of the present invention. It is a cross-sectional view of the exhaust mount shown in FIG. 1 and corresponds to the II-II cross section of FIG. Top view of the exhaust mount shown in FIG. Cross-sectional view showing the exhaust mount shown in FIG. 1 in a state of being mounted on a vehicle. Sectional drawing which shows the exhaust mount as the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 3 show an exhaust mount 10 as the first embodiment of the present invention. The exhaust mount 10 includes a main body rubber elastic body 12. In the following description, the vertical direction is the vertical direction in FIG. 2 which is the vertical direction of the vehicle when mounted on the vehicle, the horizontal direction is the horizontal direction in FIG. 2, and the front-rear direction is described later. The vertical direction in FIG. 3, which is the length direction of the insertion holes 14a and 14b, are referred to, respectively.

The main body rubber elastic body 12 has a substantially rectangular block shape, and includes an upper insertion hole 14a and a lower insertion hole 14b. The upper and lower insertion holes 14a and 14b both have a circular cross section and penetrate the main body rubber elastic body 12 in the front-rear direction. The upper and lower insertion holes 14a and 14b both have a substantially constant cross-sectional shape and extend linearly, and as shown in FIG. 3, the opening ends are tapered so that the diameter gradually increases toward the opening side. ing. As shown in FIG. 2, in the upper and lower insertion holes 14a and 14b, the upper insertion holes 14a are provided at the upper end portion of the main body rubber elastic body 12, and the lower insertion holes 14b are provided in the main body rubber elastic body 12. It is provided at the lower end and is arranged apart from each other in the vertical direction. The upper and lower insertion holes 14a and 14b are both provided substantially in the center in the left-right direction. In the present embodiment, the upper insertion hole 14a and the lower insertion hole 14b have a common shape and size.

A lightening hole 16 penetrating in the front-rear direction is formed between the upper and lower insertion holes 14a and 14b. Upper and lower stopper protrusions 18 and 18 projecting inward from both sides in the vertical direction are provided at the central portion of the lightening hole 16 in the left-right direction. As a result, the portion of the lightening hole 16 located between the upper and lower stopper protrusions 18 and 18 facing each other is made smaller in the vertical direction than the portion where the upper and lower stopper protrusions 18 and 18 are separated from each other in the left-right direction. It has a substantially H-shaped cross section as a whole. The width dimension of the lightening hole 16 in the left-right direction is larger than the width dimension of the upper and lower insertion holes 14a and 14b in the left-right direction, and the left and right ends of the lightening hole 16 are lateral to the upper and lower insertion holes 14a and 14b. It is located on the outside.

Left and right connecting portions 20, 20 are provided on both outer sides in the left-right direction of the lightening hole 16 in the main body rubber elastic body 12. The left and right connecting portions 20 and 20 have a substantially plate shape extending in the vertical direction.

Upper and lower reinforcing members 22a and 22b are provided on the outer side in the vertical direction with respect to the upper and lower insertion holes 14a and 14b. The upper and lower reinforcing members 22a and 22b are all made of metal, a hard synthetic resin, or the like. The upper and lower reinforcing members 22a and 22b are preferably plate-shaped, and in the present embodiment, all of them have a substantially flat plate shape having a curvature of substantially 0. The dimensions of the upper and lower reinforcing members 22a and 22b in the front-rear direction are slightly smaller than the dimensions in the front-rear direction of the main body rubber elastic body 12, and the dimensions in the left-right direction are smaller than the dimensions in the left-right direction of the main body rubber elastic body 12. Is also slightly smaller. In the present embodiment, the upper reinforcing member 22a and the lower reinforcing member 22b have a common shape and size, and the parts are standardized.

Then, the upper reinforcing member 22a is fixed to the upper end portion of the main body rubber elastic body 12 forming the peripheral wall of the upper insertion hole 14a in the main body rubber elastic body 12 in a substantially embedded state. Further, the lower reinforcing member 22b is fixed to the lower end portion of the main body rubber elastic body 12 forming the peripheral wall of the lower insertion hole 14b in the main body rubber elastic body 12 in a substantially embedded state. The upper reinforcing member 22a is arranged at a position separated upward from the upper insertion hole 14a, and the lower reinforcing member 22b is arranged at a position separated downward from the lower insertion hole 14b.

In other words, the upper reinforcing member 22a is provided between the upper end surface of the main body rubber elastic body 12 and the upper insertion hole 14a, and the lower reinforcing member 22b is provided with the lower end surface of the main body rubber elastic body 12. It is provided between the lower insertion hole 14b and the lower insertion hole 14b. Preferably, the upper and lower reinforcing members 22a and 22b are provided at positions closer to the upper and lower end surfaces of the main body rubber elastic body 12 than the upper and lower insertion holes 14a and 14b. As a result, the first and second mounting pins 28 and 30 (described later) can be easily inserted into the upper and lower insertion holes 14a and 14b while the main body rubber elastic body 12 is miniaturized in the vertical direction.

In the present embodiment, the upper and lower reinforcing members 22a and 22b are vulcanized and bonded at the time of molding the main body rubber elastic body 12, but can also be post-fixed with an adhesive or the like. The upper and lower reinforcing members 22a and 22b are arranged so as to spread substantially orthogonal to the vertical direction.

The width dimension W1 in the left-right direction of the upper reinforcing member 22a is larger than the diameter dimension r1 in the left-right direction of the upper insertion hole 14a. As a result, the upper reinforcing member 22a is arranged so as to cover the entire upper insertion hole 14a in the left-right radial direction at the upper side, which is the outer side in the vertical direction. Similarly, the width dimension W2 in the left-right direction of the lower reinforcing member 22b is larger than the diameter dimension r2 in the left-right direction of the lower insertion hole 14b. As a result, the lower reinforcing member 22b is arranged so as to cover the entire lower insertion hole 14b in the left-right radial direction at the lower side, which is the outer side in the vertical direction. In other words, the upper and lower reinforcing members 22a and 22b extend to both outer sides in the left-right direction from the upper and lower insertion holes 14a and 14b in the vertical projection.

As shown in FIG. 3, in the present embodiment, the openings of the upper and lower insertion holes 14a and 14b are not covered by the upper and lower reinforcing members 22a and 22b. However, it is desirable that the upper and lower insertion holes 14a and 14b have a wider range covered with the upper and lower reinforcing members 22a and 22b in the vertical direction in the front-rear direction. Preferably, more than half of the upper and lower insertion holes 14a and 14b are covered with the upper and lower reinforcing members 22a and 22b on the outer side in the vertical direction, and more preferably 4 / of the length dimension. Five or more are covered with reinforcing members 22a and 22b.

In the present embodiment, the width dimension W1 of the upper reinforcing member 22a and the width dimension W2 of the lower reinforcing member 22b have the same size. Further, the diameter dimension r1 of the upper insertion hole 14a and the diameter dimension r2 of the lower insertion hole 14b are the same size. However, the upper and lower reinforcing members 22a and 22b may have different shapes and sizes from each other, and the upper and lower insertion holes 14a and 14b may have different shapes and sizes from each other.

It is desirable that the upper reinforcing member 22a is located above the upper insertion hole 14a, which is outward from the center L1 in the vertical direction. More preferably, the upper reinforcing member 22a is separated from the upper insertion hole 14a in the front-back direction and the left-right direction projection. Further, the upper reinforcing member 22a is not provided below the upper insertion hole 14a, which is inward in the vertical direction.

Similarly, it is desirable that the lower reinforcing member 22b is located below the vertical center L2 of the lower insertion hole 14b, which is outward in the vertical direction. More preferably, the lower reinforcing member 22b is separated from the lower insertion hole 14b in the front-back and left-right projections. Further, the lower reinforcing member 22b is not provided above the lower insertion hole 14b, which is inward in the vertical direction.

In the present embodiment, the width dimension W1 of the upper reinforcing member 22a and the width dimension W2 of the lower reinforcing member 22b are larger than the width dimension W3 in the left-right direction of the lightening hole 16, respectively. As a result, the left and right end portions of the upper and lower reinforcing members 22a and 22b are positioned so as to extend outward in the vertical direction of the left and right connecting portions 20 and 20. In other words, the upper and lower reinforcing members 22a and 22b are all extended to positions where they overlap with the left and right connecting portions 20 and 20 in the vertical projection. The left and right dimensions of the upper and lower reinforcing members 22a and 22b that overlap with the left and right connecting portions 20 and 20 in the vertical projection are half or more, more preferably 2/3 or more of the left and right dimensions of the left and right connecting portions 20 and 20. It is desirable to be.

The exhaust mount 10 having such a structure is interposed between the vehicle body 24 and the exhaust pipe 26. That is, as shown in FIG. 4, the first mounting pin 28 on the vehicle body 24 side is inserted into the upper insertion hole 14a, and the second mounting pin 30 on the exhaust pipe 26 side is inserted into the lower insertion hole 14b. To. As a result, the exhaust pipe 26 is vibration-proof and supported with respect to the vehicle body 24 in a suspended state by the exhaust mount 10. When the exhaust mount 10 is mounted on the vehicle body 24 and the exhaust pipe 26, the supporting load of the exhaust pipe 26 is input to the exhaust mount 10 in the vertical direction, and the tensile load in the vertical direction acts on the rubber elastic body 12 of the main body. are doing. In FIG. 4, the deformation of the main body rubber elastic body 12 due to the action of the tensile load is omitted.

In the exhaust mount 10, the upper and lower reinforcing members 22a and 22b are arranged outside the upper and lower insertion holes 14a and 14b in the vertical direction, so that the static spring constant in the vertical direction is increased, and the exhaust pipe 26 has a large static spring constant. Stable support is realized.

That is, the upper and lower reinforcing members 22a and 22b having a width dimension in the left-right direction larger than the upper and lower insertion holes 14a and 14b are displaced in the vertical direction following the first and second mounting pins 28 and 30. As a result, the vertical force input from the first and second mounting pins 28 and 30 is dispersed and transmitted over a wider range of the main body rubber elastic body 12. As a result, a wider range of the main body rubber elastic body 12 is elastically deformed with respect to the input in the vertical direction, and the substantial rubber volume is increased, so that the static spring constant in the vertical direction is increased.

In the present embodiment, the upper and lower reinforcing members 22a and 22b are provided so as to extend outward to the upper and lower sides of the left and right connecting portions 20 and 20. Therefore, the upper and lower reinforcing members 22a and 22b disperse the force exerted on the left and right connecting portions 20 and 20, and the local concentration of strain on the left and right connecting portions 20 and 20 is avoided. As a result, the left and right connecting portions 20, 20 are elastically deformed in a wider range, and it becomes easy to set a large static spring constant. In particular, if the upper and lower reinforcing members 22a and 22b are provided so as to overlap the left and right connecting portions 20 and 20 in a wide range in the vertical projection, it becomes easier to set a larger static spring constant.

Further, the upper portion of the peripheral wall of the upper insertion hole 14a and the lower portion of the peripheral wall of the lower insertion hole 14b are restrained from being deformed by the upper and lower reinforcing members 22a and 22b. As a result, when a load in the vertical direction is input to the peripheral wall of the upper insertion hole 14a through which the first mounting pin 28 is inserted and the peripheral wall of the lower insertion hole 14b through which the second mounting pin 30 is inserted. , The peripheral wall of the upper insertion hole 14a and the peripheral wall of the lower insertion hole 14b are restrained to some extent from deformation. Therefore, a decrease in the static spring constant due to local deformation of the peripheral walls of the upper and lower insertion holes 14a and 14b is avoided.

Since the static spring constant of the main body rubber elastic body 12 is increased by providing the upper and lower reinforcing members 22a and 22b, the main body rubber elastic body 12 is made while reducing the rubber hardness of the main body rubber elastic body 12. The static spring constant of is sufficiently large. In this way, by forming the main body rubber elastic body 12 with a rubber material having a low rubber hardness, the dynamic spring constant can be reduced, and the vibration isolation effect such as vibration insulation exhibited at the time of vibration input can be advantageously obtained. be able to.

The upper and lower reinforcing members 22a and 22b are provided on the outer side in the vertical direction with respect to the upper and lower insertion holes 14a and 14b, and are not provided on the inner side in the vertical direction. As a result, the free length of the main body rubber elastic body 12 in the vertical direction is secured long, the durability of the main body rubber elastic body 12 is improved, and the degree of freedom in setting the spring characteristics of the main body rubber elastic body 12 is increased. be able to.

FIG. 5 shows an exhaust mount 40 as a second embodiment of the present invention. The exhaust mount 40 has a structure in which two upper insertion holes 14a and 14a and one lower insertion hole 14b are formed with respect to the main body rubber elastic body 42. In the following description, the members and parts substantially the same as those in the first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

The upper part of the main body rubber elastic body 42 has a larger width dimension in the left-right direction than the lower part. Two upper insertion holes 14a and 14a are provided above the main body rubber elastic body 42 having a large width dimension so as to be separated from each other in the left-right direction. At the lower part of the main body rubber elastic body 42 having a small width dimension, one lower insertion hole 14b is provided in the central portion in the left-right direction. The upper insertion holes 14a and 14a are provided at positions that are outwardly separated from the lower insertion holes 14b in the left-right direction.

A lightening hole 44 is formed in the central portion of the main body rubber elastic body 42 in the vertical direction. The lightening hole 44 has a substantially trapezoidal hole cross-sectional shape in which the lateral width dimension becomes smaller toward the upper side. Further, a stopper protrusion 46 projects from the lightening hole 44. The stopper protrusion 46 projects upward from the lower inner surface of the lightening hole 44, and the width dimension in the left-right direction becomes smaller toward the protruding tip. Both sides of the lightening hole 44 in the left-right direction are inclined downward toward the outside in the left-right direction by providing the stopper protrusion 46, and the upper insertion holes 14a and 14a and the lower insertion holes 14b are formed. It is located between. It should be noted that the left and right side portions of the lightening hole 44 in the main body rubber elastic body 42 constitute connecting portions 20 and 20 extending vertically in an inclined shape that is inclined inward in the left-right direction toward the bottom.

A reinforcing member 22b is fixed to the lower portion of the main body rubber elastic body 42. The reinforcing member 22b is made of a material harder than the main body rubber elastic body 42 such as metal or synthetic resin. The reinforcing member 22b has a flat plate shape. The reinforcing member 22b is arranged downward with respect to the lower insertion hole 14b. The reinforcing member 22b has a width dimension in the left-right direction larger than that of the lower insertion hole 14b, and is arranged so as to cover the entire lower insertion hole 14b in the left-right direction below. In short, the reinforcing member 22b extends outward in the left-right direction from the lower insertion hole 14b. The reinforcing member 22b is arranged inside the upper insertion holes 14a and 14a in the left-right direction, and does not overlap with the upper insertion holes 14a and 14a in the vertical projection. Further, no reinforcing member is provided above the upper insertion holes 14a and 14a.

In the exhaust mount 40, the first mounting pin on the vehicle body side (not shown) is inserted into the upper insertion holes 14a and 14a, respectively, and the second mounting pin on the exhaust pipe side (not shown) is inserted into the lower insertion hole 14b. As a result, the exhaust pipe is vibration-proof connected to the vehicle body.

According to the exhaust mount 40 having a structure according to the present embodiment, when the reinforcing member 22b is provided below the lower insertion hole 14b, a downward load acts on the lower insertion hole 14b. In addition, it is possible to prevent strain from concentrating on the lower end portion of the peripheral wall of the lower insertion hole 14b. Therefore, damage due to local large deformation of the main body rubber elastic body 42 is prevented, and durability is improved.

Since the two upper insertion holes 14a and 14a are provided, the upward load acting on the upper end portion of the peripheral wall of each upper insertion hole 14a at the time of vertical vibration input acts on the lower insertion hole 14b. It is dispersed and smaller than the downward load. Therefore, even if there is no reinforcing member above the upper insertion holes 14a, 14a, damage to the main body rubber elastic body 42 on the peripheral wall of the upper insertion holes 14a, 14a is unlikely to be a problem. However, reinforcing members may be provided above the upper insertion holes 14a and 14a, if necessary.

Since the reinforcing member 22b extends below the left and right connecting portions 20 and 20, the left and right connecting portions 20 and 20 are elastically deformed in a wider range when vibration is input in the vertical direction, and the strain is dispersed. Be done. As a result, the durability of the main body rubber elastic body 42 at the left and right connecting portions 20 and 20 is also improved.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited by the specific description thereof. For example, in the first embodiment, the upper and lower reinforcing members 22a and 22b are provided on the upper and lower outer sides of the upper and lower insertion holes 14a and 14b, but the upper and lower outer sides of any one of the upper and lower insertion holes 14a and 14b are provided. A reinforcing member may be provided only on the side.

The reinforcing member preferably has a flat plate shape, but the shape is not limited. For example, when the upper surface and the lower surface of the main body rubber elastic body are curved surfaces that are convex outward in the vertical direction as in the anti-vibration rubber of JP-A-7-032893, the reinforcing member is the main body rubber. It may have a curved plate shape along the upper and lower surfaces of the elastic body. However, the shape of the reinforcing member is not limited to the shape corresponding to the upper and lower surfaces of the rubber elastic body of the main body.

Further, the reinforcing member does not have to be plate-shaped, and may be columnar (block-shaped), for example. The reinforcing member may have a partial bend or break, unevenness, a hole, or the like. Even when the reinforcing member is bent, broken, or uneven, it is desirable that the entire reinforcing member is located outward in the vertical direction from the vertical center (L1, L2) of the insertion hole.

It is desirable that the reinforcing member extends to the upper and lower sides of the left and right connecting portions 20 and 20, but for example, the width dimension in the left and right direction is made smaller than the lightening hole 16 so that the reinforcing member is smaller than the left and right connecting portions 20 and 20. It may be provided only on the inside in the left-right direction.

When a plurality of reinforcing members are provided, the shapes, sizes, forming materials, and the like of the reinforcing members may be different from each other.

A plurality of reinforcing members that are independent of each other in the left-right direction or the front-rear direction may be provided. For example, when there are two upper insertion holes 14a, 14a as in the second embodiment, upper reinforcing members 22a, 22a independent of each other are provided above the upper insertion holes 14a. You may.

The inner surface of the peripheral wall of the insertion hole does not necessarily have to be formed of rubber. For example, the inner surface of the peripheral wall of the insertion hole may be formed by a hard sleeve made of metal or the like.

The cross-sectional shape of the insertion hole is not limited to a circle, and may be an ellipse, a polygon, or an irregular shape. Even when the hole cross-sectional shape of the insertion hole is other than circular, it is desirable that the entire reinforcing member is provided outside the center of the hole cross-section in the vertical direction.

Lightening holes are not essential. Further, a plurality of lightening holes may be formed. The cross-sectional shape of the lightening hole is not limited.

10,40 Exhaust mount 12,42 Main body rubber elastic body 14 Insertion hole 14a Upper insertion hole 14b Lower insertion hole 16,44 Lightening hole 18,46 Stopper protrusion 20 Connecting part 22 Reinforcing member 22a Upper reinforcing member 22b Below Reinforcing member on the side 24 Body 26 Exhaust pipe 28 First mounting pin (mounting pin on the vehicle body side)
30 Second mounting pin (mounting pin on the exhaust pipe side)

Claims (4)

The main body rubber elastic body is provided with a plurality of insertion holes through which a mounting pin on the vehicle body side extending from the vehicle body and a mounting pin on the exhaust pipe side extending from the exhaust pipe are inserted, and the main body rubber elastic body is provided with a plurality of insertion holes. It is an exhaust mount that supports the exhaust pipe in a suspended state with respect to the vehicle body by being interposed between the vehicle body and the exhaust pipe.
In the rubber elastic body of the main body, a reinforcing member is provided at a position away from the insertion hole in the vertical direction at a portion constituting the peripheral wall of the insertion hole, and the reinforcing member moves up and down as a whole in the radial direction of the insertion hole. Exhaust mounts that are placed to cover the outside of the direction. Reinforcing members are provided on each outer side in the vertical direction with respect to both the insertion hole through which the mounting pin on the exhaust pipe side is inserted and the insertion hole through which the mounting pin on the vehicle body side is inserted. The exhaust mount according to claim 1. The rubber elastic body of the main body is provided with connecting portions on both sides of the insertion hole in the width direction, which is the radial direction, and the reinforcing member extends outward in the vertical direction of the connecting portions. Or the exhaust mount according to 2. The exhaust mount according to any one of claims 1 to 3, wherein the reinforcing member has a flat plate shape.

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