Muffler support

Abstract

To provide a muffler support having a novel structure which can facilitate attachment to a vehicle or the like by improving the insertion workability of each attachment shaft into first and second attachment holes.SOLUTION: In a muffler support 10 which has a first attachment hole 12 and a second attachment hole 14 extending across each other by a projection in a vertical direction, and in which a peripheral wall part 16 of the first attachment hole 12 and a peripheral wall part 18 of the second attachment hole 14 are connected to each other by a pair of elastic arm parts 20, and the elastic arm parts 20 are formed into curved shapes which are bulged to the outside, a pressing operation face 30 in an axial direction of the first attachment hole 12 is constituted by enlarging a thickness dimension of a portion located at the first attachment hole 12 side of the elastic arm part 20 compared with a portion located at the second attachment hole 14 side, and by reducing thickness dimensions of the elastic arm parts 20 toward an end part of the second attachment hole 14 side, and making the elastic arm parts approach each other, a length B2 of the second attachment hole 14 is set smaller than maximum outer width dimensions B1 of the elastic arm parts 20.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a muffler support for use in an automobile or the like. [Background technology]

[0002] Conventionally, muffler supports have been used in power units equipped with internal combustion engines to support exhaust system members on the vehicle body in a vibration-proof manner. Such muffler supports generally have a structure as proposed in JP 2002-70547 A (Patent Document 1), in which the peripheral walls of a first mounting hole and a second mounting hole are elastically connected by a pair of elastic arms.

[0003] Such a muffler support is attached to a vehicle by inserting a mounting shaft provided on either the vehicle body side member or the exhaust system member into the first mounting hole and the second mounting hole. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-70547 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, because each mounting shaft is inserted into each mounting hole in abutting or press-fit state, the installation work is difficult and time-consuming. In particular, with small muffler supports, even if you try to insert the mounting shaft by pressing the periphery of the axial opening end of each mounting hole, the pressing area is small, making it difficult to apply sufficient pressing force, making the installation work even more difficult.

[0006] The present invention has been made against the background of the circumstances described above, and its problem to be solved is to provide a muffler support of a new structure that improves the ease with which the mounting shafts are inserted into the first and second mounting holes, thereby making it easier to install the muffler support on a vehicle, etc. [Means for solving the problem]

[0007] The following describes preferred embodiments for understanding the present invention, but the embodiments described below are merely illustrative and may be combined with one another as appropriate, and the multiple components described in each embodiment may be recognized and used independently as far as possible, and may also be combined with any of the components described in another embodiment as appropriate. As a result, the present invention is not limited to the embodiments described below, and various other embodiments may be realized.

[0008] In a first aspect, a muffler support has a first mounting hole and a second mounting hole which extend and intersect each other when projected in the vertical direction, and the peripheral wall portion of the first mounting hole and the peripheral wall portion of the second mounting hole are connected by a pair of elastic arms, and each of the pair of elastic arms has an outwardly bulging curved shape, in which a portion of the pair of elastic arms located on the first mounting hole side is made thicker than a portion of the pair of elastic arms located on the second mounting hole side to form a pressing operation surface in the axial direction of the first mounting hole, and the thickness of the pair of elastic arms is reduced toward the end on the second mounting hole side and are brought closer to each other, so that the axial length of the second mounting hole is smaller than the maximum outer width dimension of the pair of elastic arms.

[0009] According to this aspect, when inserting the mounting shaft into the first mounting hole, the pressing surface area is secured well, improving the ease of insertion. Also, when inserting the mounting shaft into the second mounting hole, the axial length of the second mounting hole is set short, reducing frictional resistance during insertion, improving the ease of insertion. Moreover, by reducing the thickness dimension of the elastic arm portion on the second mounting hole side, even if the pair of elastic arms are positioned close to each other, the size of the through window formed between the pair of elastic arms can be secured without being excessively limited.

[0010] In a second aspect, in the muffler support according to the first aspect, with respect to the width dimension of the pair of elastic arms which is in the axial direction of the first mounting hole, the width dimension of the pair of elastic arms at a portion located on the second mounting hole side is larger than the width dimension of the pair of elastic arms at a portion located on the first mounting hole side.

[0011] According to this aspect, at the end portion on the second mounting hole side where the thickness dimension of the pair of elastic arms is reduced, a sufficient cross-sectional area can be achieved, thereby reducing stress concentration and improving durability.

[0012] A third aspect is a muffler support having a first mounting hole and a second mounting hole which extend and intersect each other when projected in the vertical direction, a peripheral wall portion of the first mounting hole and a peripheral wall portion of the second mounting hole are connected by a pair of elastic arms, and a through window extending in the length direction of the first mounting hole is formed between the pair of elastic arms, and a vertical stopper portion is formed inside the through window by opposing surfaces on the peripheral wall side of the first mounting hole and the peripheral wall side of the second mounting hole, and in the stopper portion, the length dimension in the penetration direction of the through window of the opposing surface on the peripheral wall side of the first mounting hole is larger than the opposing surface on the peripheral wall side of the first mounting hole.

[0013] In the conventional muffler support, the rubber block shape was of a substantially constant thickness, so the length dimension of the stopper abutment surface within the through window was substantially the same.

[0014] However, the exhaust system member is displaced relative to the vehicle body member by swinging, etc. As a result, the stopper abutment surfaces on the first mounting hole side and the second mounting hole side are misaligned with each other in the penetration direction of the through window, making it difficult to stably secure the abutment surfaces and abutment state of the stopper.

[0015] Therefore, in this embodiment, by enlarging the opposing surface on the peripheral wall side of the second mounting hole, even if the opposing surface on the peripheral wall side of the first mounting hole moves relatively, the area of ​​the stopper abutment surface and the abutment state can be stably secured, and the stopper function can be stabilized. Moreover, in this embodiment, since the stopper abutment surface (opposing surface) on the peripheral wall side of the first mounting hole is set small in the axial direction, the axial length of the first mounting hole can be reduced, and frictional resistance when the mounting shaft is inserted into the first mounting hole can be suppressed. As a result, it is also possible to improve the ease of installation of the muffler support on the vehicle.

[0016] In a fourth aspect, in the muffler support according to the third aspect, the outer diameter dimension of the peripheral wall portion of the second mounting hole is made larger than the length dimension of the peripheral wall portion of the first mounting hole in the penetration direction of the through window.

[0017] According to this aspect, as described above, the length of the first mounting hole is set short, thereby reducing frictional resistance when inserting the mounting shaft, thereby improving the ease of mounting. Moreover, the aspect in which the length dimension of the stopper abutment surface on the second mounting hole side is made larger than that of the stopper abutment surface on the first mounting hole side can be achieved by increasing the diameter of the peripheral wall without requiring an increase in the length dimension of the second mounting hole, so that an increase in insertion resistance of the mounting shaft due to an increase in the length of the second mounting hole can be avoided, and problems such as a decrease in the ease of mounting the mounting shaft into the second mounting hole do not occur. Effect of the Invention

[0018] According to the present invention, it is possible to provide a muffler support that can improve the efficiency of inserting the mounting shafts into the first and second mounting holes, thereby facilitating installation on a vehicle or the like. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view showing a muffler support according to an embodiment of the present invention; [Diagram 2] A front view of the muffler support shown in FIG. [Diagram 3] Right side view of the muffler support shown in Figure 1 [Figure 4] IV-IV cross section in FIG. [Diagram 5] VV cross section in Figure 2 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] In order to clarify the present invention more specifically, embodiments of the present invention will be described in detail below with reference to the drawings.

[0021] 1 to 5 show a muffler support 10 as one embodiment of the present invention. This muffler support 10 supports exhaust system members such as a muffler in a vehicle in a vibration-proof manner relative to the vehicle body. In the following description, the vertical direction generally refers to the vertical direction in FIG. 2.

[0022] More specifically, the muffler support 10 of this embodiment has a first mounting hole 12 and a second mounting hole 14 that extend crossing each other when projected in the up-down direction, and a peripheral wall portion 16 of the first mounting hole 12 and a peripheral wall portion 18 of the second mounting hole 14 are connected by a pair of elastic arms 20, 20. Each of the pair of elastic arms 20, 20 has a curved shape that bulges outward. In this embodiment, the entire muffler support 10 is made of an elastic body such as rubber or elastomer, and is an integrally molded product made of a single material.

[0023] In addition, the intersection angle between the first mounting hole 12 and the second mounting hole 14 in the vertical projection is not limited, but in this embodiment, the first mounting hole 12 and the second mounting hole 14 extend in directions perpendicular to each other. The orientation of the muffler support 10 when mounted to the vehicle is not limited, but in the following description, the left-right direction generally refers to the direction in which the second mounting hole 14 extends (the left-right direction in FIG. 2), and the front-rear direction generally refers to the direction in which the first mounting hole 12 extends (the bottom-upper direction in FIG. 5).

[0024] The first mounting hole 12 is a circular through hole, and a circumferential wall portion 16 having a substantially cylindrical shape extending in the front-rear direction is provided around the first mounting hole 12. In other words, the inner hole of the circumferential wall portion 16 is the first mounting hole 12. In this embodiment, the inner diameter dimension of the first mounting hole 12 is constant over substantially the entire length in the longitudinal direction (front-rear direction), and at both longitudinal ends of the first mounting hole 12, the inner diameter dimension is gradually increased toward the outside in the longitudinal direction. A lower end surface 22 located at the lower end of the outer circumferential surface of the circumferential wall portion 16 has a flat portion extending in the horizontal direction (direction perpendicular to the up-down direction). In addition, both longitudinal end surfaces of the circumferential wall portion 16 are vertical surfaces 23 extending in a direction perpendicular to the front-rear direction, and each vertical surface 23 is formed into a substantially annular shape.

[0025] The second mounting hole 14 is a circular through hole, and a substantially cylindrical peripheral wall portion 18 extending in the left-right direction is provided around the second mounting hole 14. In other words, the inner hole of the peripheral wall portion 18 is the second mounting hole 14. In this embodiment, the inner diameter dimension of the second mounting hole 14 is constant over substantially the entire length in the longitudinal direction (left-right direction), and at both longitudinal ends of the second mounting hole 14, the inner diameter dimension is gradually increased toward the outside in the longitudinal direction. An upper end surface 24 located at the upper end of the outer peripheral surface of the peripheral wall portion 18 has a flat portion extending in the horizontal direction. In this embodiment, a flat surface 26 extending in the horizontal direction is also provided at the lower end of the outer peripheral surface of the peripheral wall portion 18. In addition, both longitudinal end faces of the peripheral wall portion 18 are vertical surfaces 27 extending in a direction perpendicular to the left-right direction, and each vertical surface 27 is formed into a substantially annular shape.

[0026] The peripheral wall portion 16 of the first mounting hole 12 and the peripheral wall portion 18 of the second mounting hole 14 are disposed opposite each other in the up-down direction with a gap therebetween. That is, a lower end surface 22 at the lower end of the peripheral wall portion 16 and an upper end surface 24 at the upper end of the peripheral wall portion 18 face each other while being spaced apart from each other in the up-down direction. Therefore, the lower end surface 22 constitutes the opposing surface of the first mounting hole 12 on the peripheral wall portion 16 side, and the upper end surface 24 constitutes the opposing surface of the second mounting hole 14 on the peripheral wall portion 18 side. In this embodiment, as shown in FIG. 4, the center of the length of the first mounting hole 12 and the center of the width of the second mounting hole 14 are located at substantially the same position in the front-rear direction, and as shown in FIG. 2, the center of the width of the first mounting hole 12 and the center of the length of the second mounting hole 14 are located at substantially the same position in the left-right direction.

[0027] The peripheral wall portion 16 of the first mounting hole 12 and the peripheral wall portion 18 of the second mounting hole 14 are connected by a pair of elastic arms 20, 20. The elastic arms 20 are provided on both the left and right sides of the peripheral wall portion 16 of the first mounting hole 12. In this embodiment, the elastic arms 20 on both the left and right sides have the same shape, and each elastic arm 20 is provided from the upper end of the peripheral wall portion 16 of the first mounting hole 12 to the upper end portion of the peripheral wall portion 18 of the second mounting hole 14.

[0028] Each elastic arm 20 has a curved shape that bulges outward, and at the lower portion of the peripheral wall 16, a gap is formed in the left-right direction between the outer peripheral surface of the peripheral wall 16 and the inner peripheral surface of each elastic arm 20. These left and right gaps communicate with the gaps between the lower and upper end faces 22, 24, and in this embodiment, a single gap is formed that spreads on three sides (left and right sides and below) around the peripheral wall 16. This gap opens on both front and rear sides, and thus in this embodiment, a through window 28 is formed between the pair of elastic arms 20, 20 that extends in the length direction (front and rear direction) of the first mounting hole 12.

[0029] The outer peripheral surface and the inner peripheral surface of each elastic arm portion 20 are curved surfaces, and the portion of the outer peripheral surface of each elastic arm portion 20 that protrudes most outward in the left-right direction is provided in the vertical middle portion of each elastic arm portion 20. The curvature of the inner peripheral surface of each elastic arm portion 20 is smaller than the curvature of the outer peripheral surface of each elastic arm portion 20, and the inner peripheral surface of each elastic arm portion 20 is connected to the outer peripheral surface of the peripheral wall portion 16 and the upper end surface 24, which is the outer peripheral surface of the peripheral wall portion 18, while curving relatively gently. As a result, in this embodiment, the thickness dimension A1 (see FIG. 2) of the portion of each elastic arm portion 20 located on the first mounting hole 12 side is larger than the thickness dimension A2 (see FIG. 2) of the portion of each elastic arm portion 20 located on the second mounting hole 14 side.

[0030] By setting the thickness dimension of each elastic arm 20 as described above, a pressing operation surface 30 in the axial direction (front-rear direction) of the first mounting hole 12 is formed on both end surfaces in the front-rear direction of each elastic arm 20. Each of these pressing operation surfaces 30 spreads with a certain width when viewed in the front-rear direction (projected in the front-rear direction). In addition, both ends of the front-rear direction of each elastic arm 20 have flat parts that spread in the up-down direction, and are connected by curved surfaces that smoothly curve from the flat parts on both sides in the front-rear direction of each elastic arm 20 to the outer circumferential surface. Each of the pressing operation surfaces 30 may have a part that includes not only the flat parts on both sides in the front-rear direction of each elastic arm 20 but also the curved surface on the outer circumferential side. As described later, the pressing operation surface 30 is a part to which a pressing operation force is applied when the mounting shaft 34 is inserted into the first mounting hole 12, and for example, the end part (lower end part) of each elastic arm 20 on the second mounting hole 14 side may not constitute the pressing operation surface 30. The lower end of the pressing operation surface 30 is, but is not limited to, located higher than the lower end surface 22 of the peripheral wall portion 16, for example.

[0031] Moreover, the thickness of each elastic arm portion 20 decreases from the portion where the thickness dimension is greatest toward the end portion on the second mounting hole 14 side (the lower end portion of each elastic arm portion 20, the upper end portion of the peripheral wall portion 18) and the elastic arms 20 are closer to each other. As a result, as shown in Fig. 2, the axial (left-right) length B2 of the second mounting hole 14 (i.e., the length dimension of the peripheral wall portion 18) is smaller than the maximum outer width dimension B1 of the pair of elastic arms 20, 20.

[0032] On the other hand, in each elastic arm portion 20, the width dimension in the front-to-rear direction, which is the axial direction of the first mounting hole 12, is made larger in width dimension C2 (see Figure 3) of the portion of each elastic arm portion 20 located on the second mounting hole 14 side than in width dimension C1 (see Figure 3) of the portion of each elastic arm portion 20 located on the first mounting hole 12 side.

[0033] In this embodiment, the width dimension C1 of the portion of each elastic arm 20 located on the first mounting hole 12 side is smaller than the length dimension (D1 described later) of the peripheral wall 16 of the first mounting hole 12. That is, as shown in Fig. 3, the pressing operation surfaces 30 on both sides in the front-rear direction of each elastic arm 20 are located to some extent inward in the front-rear direction from the vertical surfaces 23 on both sides in the front-rear direction of the peripheral wall 16 (are set back inward in the front-rear direction). In this way, by positioning each pressing operation surface 30 inward in the front-rear direction from the vertical surfaces 23 of the peripheral wall 16, when a pressing operation force is applied to each pressing operation surface 30 during insertion of the mounting shaft 34 into the first mounting hole 12, it is possible to prevent the pressing operation force from being applied to the opening periphery of the first mounting hole 12, causing the opening of the first mounting hole 12 to deform, etc., and thus preventing deterioration in the workability of inserting the mounting shaft 34. Furthermore, by positioning each pressing operation surface 30 inward in the front-rear direction from each vertical surface 23 of the peripheral wall portion 16, it is possible to prevent the rubber volume of each elastic arm portion 20 from becoming too large.

[0034] As described above, a through window 28 that opens in the front-rear direction is formed between each elastic arm 20, and the opposing surface (lower end surface 22) on the peripheral wall portion 16 side of the first mounting hole 12 and the opposing surface (upper end surface 24) on the peripheral wall portion 18 side of the second mounting hole 14 face each other in the vertical direction. As a result, when an external force in the vertical direction is input to the muffler support 10 and each elastic arm 20 is elastically deformed, when the peripheral wall portion 16 of the first mounting hole 12 and the peripheral wall portion 18 of the second mounting hole 14 approach each other, the lower end and upper end surfaces 22, 24 come into contact with each other, thereby restricting the relative displacement between the vehicle body side member (a mounting shaft 34 to be described later that is inserted through the first mounting hole 12) and the exhaust system member (a mounting shaft 36 to be described later that is inserted through the second mounting hole 14). As a result, the opposing surfaces (lower end and upper end surfaces 22, 24) form a stopper portion 32 in the vertical direction. Therefore, the lower end surface 22 constitutes a stopper abutment surface on the first mounting hole 12 side, and the upper end surface 24 constitutes a stopper abutment surface on the second mounting hole 14 side.

[0035] In the penetration direction (front-rear direction) of the through window 28 in the stopper portion 32, as shown in FIG. 4, the length dimension D2 of the facing surface (upper end surface 24) of the second mounting hole 14 on the peripheral wall portion 18 side is larger than the length dimension D1 (i.e., the length dimension of the peripheral wall portion 16) of the facing surface (lower end surface 22) of the first mounting hole 12 on the peripheral wall portion 16 side. In this embodiment, a chamfered curved surface is provided at both ends in the length direction (front-rear direction) of the outer peripheral surface of the peripheral wall portion 16, and the lower end surface 22 includes not only a flat spreading portion but also curved surfaces at both ends in the front-rear direction. Similarly, the upper end surface 24 is connected to the outer peripheral surface of the peripheral wall portion 18 via a chamfered curved surface, and the upper end surface 24 includes not only a flat spreading portion but also curved surfaces at both ends in the front-rear direction. In addition, the flat spreading portions of the lower end and upper end surfaces 22, 24 may be provided with irregularities, for example.

[0036] In addition, in this embodiment, in the penetration direction (front-to-back direction) of the through window 28, the outer diameter dimension E (see Figure 4) of the peripheral wall portion 18 of the second mounting hole 14 is larger than the length dimension D1 of the peripheral wall portion 16 of the first mounting hole 12.

[0037] In the muffler support 10 constructed as described above, the peripheral wall portions 16, 18 and the elastic arm portions 20 are integrally formed. That is, in this embodiment, the muffler support 10 is formed as an integrally molded product that integrally includes the peripheral wall portions 16, 18 and the elastic arm portions 20. In this muffler support 10, various dimensions such as the length dimension D1 of the peripheral wall portion 16, the length dimension B2 of the peripheral wall portion 18, the thickness dimensions A1 and A2 of the elastic arm portions 20, and the width dimensions C1 and C2 are not limited and can be appropriately set according to the required spring characteristics, etc.

[0038] The muffler support 10 is interposed between the vehicle body member and the exhaust system member by inserting a mounting shaft 34 provided on the vehicle body member into the first mounting hole 12 and inserting a mounting shaft 36 provided on an exhaust system member such as a muffler into the second mounting hole 14, thereby elastically connecting them. In other words, vibrations input to the muffler support 10 are absorbed by the elastic deformation of each elastic arm portion 20, etc., and a stable vibration-proofing effect can be achieved. The mounting shafts 34, 36 are attached by being inserted into the first mounting hole 12 and the second mounting hole 14 in abutting or press-fitted state.

[0039] In this embodiment, in each elastic arm portion 20 that is provided bulging outward, the thickness dimension A1 of the portion located on the first mounting hole 12 side is made larger than the thickness dimension A2 of the portion located on the second mounting hole 14 side, so that each pressing operation surface 30 formed on both end surfaces in the front-rear direction of each elastic arm portion 20 can be formed with a relatively large area. This makes it possible to insert the mounting shaft 34 into the first mounting hole 12 by applying a pressing force to each pressing operation surface 30 with a finger, a jig, or the like, for example, and makes it easier to insert the mounting shaft 34 into the first mounting hole 12.

[0040] Moreover, the elastic arms 20 approach each other toward the peripheral wall 18 of the second mounting hole 14, and the length dimension B2 of the second mounting hole 14 (length dimension of the peripheral wall 18) is kept relatively small. This prevents the insertion resistance from becoming too large when the mounting shaft 36 is inserted into the second mounting hole 14. Furthermore, since the thickness dimension of each elastic arm 20 decreases toward the peripheral wall 18 of the second mounting hole 14, the left-right gap between each elastic arm 20 and the peripheral wall 16 of the first mounting hole 12 and the through window 28 can be stably provided, and the desired vibration-proofing effect can be more reliably achieved.

[0041] With regard to the width dimension of each elastic arm portion 20, the width dimension C2 of the portion located on the second mounting hole 14 side is made larger than the width dimension C1 of the portion located on the first mounting hole 12 side. In this way, the width dimension is ensured at the portion of each elastic arm portion 20 on the second mounting hole 14 side, with the thickness dimension being reduced, so that the cross-sectional area of ​​the portion of each elastic arm portion 20 on the second mounting hole 14 side does not become too small, and concentration of stress and strain is avoided when each elastic arm portion 20 elastically deforms when vibration is input, thereby improving durability.

[0042] On the other hand, in the stopper portion 32 of the muffler support 10, the length dimension D2 of the opposing surface (upper end surface 24) of the second mounting hole 14 on the peripheral wall portion 18 side is made larger than the length dimension D1 of the opposing surface (lower end surface 22) of the first mounting hole 12 on the peripheral wall portion 16 side in the penetration direction (front-rear direction) of the through window 28. This allows the upper and lower opposing surfaces (lower end and upper end surfaces 22, 24) to stably abut upon vibration input to the muffler support 10, and allows the stopper portion 32 to stably exert its stopper effect. In addition, by setting the length dimension D1 of the lower end surface 22 to be relatively small, the length dimension of the peripheral wall portion 16 can also be kept small, thereby avoiding an increase in insertion resistance when inserting the mounting shaft 34 into the first mounting hole 12.

[0043] In particular, in the penetration direction (front-rear direction) of the through window 28, the outer diameter dimension E of the peripheral wall portion 18 of the second mounting hole 14 is made larger than the length dimension D1 of the peripheral wall portion 16 of the first mounting hole 12. By setting in this manner, the length dimension D1 of the peripheral wall portion 16 can be kept relatively small, so that the insertion resistance when inserting the mounting shaft 34 into the first mounting hole 12 can be reduced. In addition, by increasing the outer diameter dimension E of the peripheral wall portion 18, the length dimension D2 of the opposing surface (upper end surface 24) on the peripheral wall portion 18 side can be increased, so that the length dimension B2 of the peripheral wall portion 18 does not increase when the length dimension D2 of the opposing surface (upper end surface 24) on the peripheral wall portion 18 side is increased, and an increase in insertion resistance when inserting the mounting shaft 36 into the second mounting hole 14 is avoided.

[0044] Although one embodiment of the present invention has been described in detail above, the present invention is in no way limited by the specific description of the embodiment, and can be implemented in various forms with various changes, modifications, improvements, etc. based on the knowledge of those skilled in the art, and it goes without saying that all such embodiments are included within the scope of the present invention as long as they do not deviate from the spirit of the present invention.

[0045] For example, in the above embodiment, the first mounting hole 12 and the second mounting hole 14 extend in directions perpendicular to each other when projected in the vertical direction, but this is not limited to this form, and the first mounting hole and the second mounting hole may intersect at an angle smaller than 90 degrees or greater than 90 degrees in a planar view.

[0046] In the above embodiment, the elastic arms 20 are of the same shape, but the elastic arms may be of different shapes. In one aspect of the present invention, the shape of the pair of elastic arms is not limited as long as the thickness of the portion located on the first mounting hole side is larger than the thickness of the portion located on the second mounting hole side, and the thickness is reduced toward the end on the second mounting hole side and the elastic arms are close to each other. For example, the upper end of the elastic arm may be located below the upper end of the peripheral wall of the first mounting hole, and the elastic arm may extend from the vertical middle part of the peripheral wall of the first mounting hole. In another aspect of the present invention, the shape of the elastic arm is not limited as long as it connects the peripheral wall of the first mounting hole and the peripheral wall of the second mounting hole.

[0047] In the embodiment described above, in the penetration direction (front-rear direction) of the through window 28, the length dimension D2 of the opposing surface (upper end surface 24) of the second mounting hole 14 on the peripheral wall portion 18 side is larger than the length dimension D1 of the opposing surface (lower end surface 22) of the first mounting hole 12 on the peripheral wall portion 16 side, but in one aspect of the present invention, the present invention is not limited to the above configuration. That is, the length dimension of the opposing surface of the second mounting hole on the peripheral wall portion side may be equal to or smaller than the length dimension of the opposing surface of the first mounting hole on the peripheral wall portion side.

[0048] In the above embodiment, the entire muffler support 10 is made of a single elastic body made of rubber, elastomer, or the like, but the muffler support according to the present invention may have a hard member, for example, metal or synthetic resin, embedded therein, and the hard member may provide a reinforcing effect. That is, the muffler support according to the present invention may be a composite of an elastic body and a hard member, or may be a composite of a plurality of elastic bodies made of a plurality of different materials depending on the required vibration-proofing characteristics, etc. [Explanation of symbols]

[0049] 10 Muffler support 12 First mounting hole 14 Second mounting hole 16 (First mounting hole) peripheral wall portion 18 (Second mounting hole) peripheral wall portion 20 Elastic arm 22 Lower end surface (opposing surface on the peripheral wall side of the first mounting hole) 23 Vertical Plane 24 Upper end surface (opposing surface on the peripheral wall side of the second mounting hole) 26 Flat surface 27 Vertical Plane 28 Through window 30 Press operation surface 32 Stopper part 34,36 Mounting axis A1: Thickness dimension of the part of the elastic arm located on the first mounting hole side A2: Thickness dimension of the part of the elastic arm located on the second mounting hole side B1 Maximum outer width dimension of a pair of elastic arms B2 Axial length of second mounting hole C1: Width dimension of the part of the elastic arm located on the first mounting hole side C2 Width dimension of the part of the elastic arm located on the second mounting hole side D1: Length of the surface facing the peripheral wall of the first mounting hole (length of the peripheral wall of the first mounting hole) D2: Length of the surface facing the peripheral wall of the second mounting hole E Outer diameter of the peripheral wall of the second mounting hole

Claims

1. A muffler support having a first mounting hole and a second mounting hole which extend intersecting each other when projected in the up-down direction, a peripheral wall portion of the first mounting hole and a peripheral wall portion of the second mounting hole are connected by a pair of elastic arms, each of the pair of elastic arms having an outwardly curved shape, The thickness of the portions of the pair of elastic arm portions located on the first mounting hole side is made larger than that of the portions of the pair of elastic arm portions located on the second mounting hole side, thereby forming a pressing operation surface in the axial direction of the first mounting hole, The thickness of the pair of elastic arms is reduced toward the end of the second mounting hole and is brought closer to each other, so that the axial length of the second mounting hole is smaller than the maximum outer width of the pair of elastic arms. Muffler support.

2. Regarding the dimension in the width direction of the pair of elastic arm portions which is the axial direction of the first mounting hole, The width dimension of the pair of elastic arm portions at a portion located on the second mounting hole side is larger than the width dimension of the pair of elastic arm portions at a portion located on the first mounting hole side. The muffler support according to claim 1 .

3. a muffler support having a first mounting hole and a second mounting hole which extend intersecting each other when projected in the vertical direction, a peripheral wall portion of the first mounting hole and a peripheral wall portion of the second mounting hole are connected by a pair of elastic arms, a through window is formed between the pair of elastic arms and extends in the length direction of the first mounting hole, and a vertical stopper portion is formed inside the through window by opposing surfaces on the peripheral wall side of the first mounting hole and the peripheral wall side of the second mounting hole, In the stopper portion, the opposing surface on the peripheral wall portion side of the second mounting hole has a larger length dimension in the penetration direction of the through window than the opposing surface on the peripheral wall portion side of the first mounting hole. Muffler support.

4. In a penetration direction of the through window, an outer diameter dimension of a peripheral wall portion of the second mounting hole is larger than a length dimension of a peripheral wall portion of the first mounting hole. The muffler support according to claim 3.

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