JP2012117403A - Muffler support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a muffler support of a novel structure, which can effectively alleviate the difficulty of attachment work resulting from a relative dimensional variation of each attachment position between an exhaust pipe side and a vehicle body side in attachment, without causing a problem such as the deterioration of vibration insulation performance resulting from the low-spring performance of a rubber material itself, the lowering of durability caused by the reduction of a rubber volume, and the high-spring performance of spring characteristics.SOLUTION: A shearing component can effectively be generated at a rubber elastic body 16 since there is formed a specific inclined portion at the rubber elastic body 16 which connects an inner attachment member 12 and an outer attachment member 14, the vibration insulation performance excellent in vibration in a vertical direction being the vibration input direction of an exhaust pipe 18 and durability performance can be exhibited, relative displacement in a horizontal direction between the inner attachment member 12 and the outer attachment member 14 can easily be permitted, and thus the improvement of the attachment work corresponding to the relative dimensional variation of each attachment position between the exhaust pipe 18 side and the vehicle body 20 side can effectively be achieved.

Description

  The present invention relates to a muffler support for supporting the exhaust pipe of an automobile on a vehicle body with vibration isolation, and in particular, has a novel structure that enables easy mounting work without impairing the vibration isolation performance and durability of the muffler support. About muffler support.

  Conventionally, a muffler support has been used as a support portion of the exhaust pipe to the vehicle body. There is also a hanging type formed of a single rubber as a muffler support, but with such a single muffler support, it is difficult to reliably limit the amount of displacement of the exhaust pipe in order to avoid interference with other parts of the exhaust pipe. Therefore, for example, as shown in Japanese Patent Application Laid-Open No. 2005-2963 (Patent Document 1), a mounting shaft fitting attached to the exhaust pipe is inserted and disposed in a groove of a groove-shaped fitting attached to the vehicle body. There has been proposed a muffler support having a structure in which the mounting shaft bracket is connected to both side walls of the groove-shaped mounting bracket with a pair of rubber elastic bodies.

  By the way, the muffler support is required to secure a soft spring characteristic as compared with a general anti-vibration mount or the like for vibration insulation of the exhaust pipe while ensuring sufficient durability. Therefore, as shown in Patent Document 1 above, in order to realize a soft spring characteristic in the vertical direction as the vibration input direction of the exhaust pipe while securing the rubber volume and maintaining the durability, the mounting shaft A pair of rubber elastic bodies extending in a substantially horizontal direction toward both side walls of the groove-shaped mounting bracket is adopted on both sides of the metal fitting, and the main deformation in the vibration input direction of the exhaust pipe in this rubber elastic body is shear deformation. It is supposed to be.

  On the other hand, since the exhaust pipe is long and extends from the front to the rear of the vehicle body, the exhaust pipe side mounting position and the vehicle body side mounting position in the muffler support are caused by variations in parts and assembly of the automobile. Are easily misaligned with each other. Therefore, the muffler support is required to be able to be mounted with good workability without any major trouble even when there is such a shift in the mounting position.

  However, in the muffler support having the conventional structure as described in Patent Document 1 described above, the rubber elastic body extending in a substantially horizontal direction, which is employed to realize soft spring characteristics, is provided in the horizontal direction with respect to the groove-shaped mounting bracket of the mounting shaft bracket. Compressive / tensile deformation is caused when the relative displacement is. Therefore, if there is a deviation between the mounting position of the mounting shaft bracket on the exhaust pipe side and the mounting position of the groove mounting bracket on the vehicle body side, the mounting shaft bracket is displaced relative to the groove mounting bracket. When mounting at each mounting position on the exhaust pipe side and the vehicle body side, the rubber elastic body is compressed / tensilely deformed between the mounting shaft bracket and the groove mounting bracket, so mounting work is required due to large deformation rigidity. It was very difficult.

JP 2005-2963 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is that the rubber material itself has a low spring and a decrease in durability due to a decrease in rubber volume, and vibration input. The difficulty of mounting work due to relative dimensional variations in the mounting positions on the exhaust pipe side and the vehicle body side during mounting is avoided without the problem of reduced vibration isolation performance due to higher spring characteristics in the direction. It is to provide a muffler support having a novel structure that can be effectively reduced.

  That is, according to the first aspect of the present invention, an inner mounting member attached to the exhaust pipe is disposed between a pair of opposed plate portions provided in an outer mounting member attached to the vehicle body, and the inner mounting member In the muffler support provided with a pair of rubber elastic bodies extending on both sides toward the pair of opposed plate portions, each of the pair of rubber elastic bodies is inclined sideways with respect to the opposed direction of the pair of opposed plate portions. The muffler support is provided with an inclined portion that is elastically deformed with a shearing component when the inner mounting member approaches the opposing plate portion and is displaced in the separation direction.

  In the muffler support according to this aspect, the inner mounting member and the outer mounting member must be displaced relative to each other due to relative dimensional variations of the mounting plates between the exhaust side and the vehicle body side. When the member is relatively displaced in the horizontal direction when mounted on the outer mounting member, for example, in the opposing direction of the pair of opposing plate portions or in the orthogonal direction thereof, the pair of rubber elastic bodies is elastically deformed with a shear component in both cases. It will be. Therefore, it is easy to relatively adjust the mounting positions of the inner mounting member and the outer mounting member on the exhaust pipe side and the vehicle body side based on soft spring characteristics based on shear deformation. Therefore, even if the mounting position of the muffler support on the exhaust pipe side and the mounting position on the vehicle body side are relatively deviated due to individual differences for each vehicle due to component dimensional errors, assembly errors, etc., the muffler support inner The attachment member and the outer attachment member can be easily attached to the respective attachment positions, and the muffler support can be attached to the vehicle with excellent workability.

  In addition, in the vibration input direction, when the inner mounting member is displaced relative to the outer mounting member in the vertical vertical direction orthogonal to the opposing direction of the pair of opposing plate portions, shear deformation mainly occurs in the pair of rubber elastic bodies. It will be squeezed. Therefore, an excellent vibration insulation effect can be exhibited by the low spring characteristics of the pair of rubber elastic bodies against the input vibration.

  In addition, in the vibration input direction, which is also the support load input direction of the exhaust pipe, shear deformation is mainly caused in the pair of rubber elastic bodies as described above, so that the vibration-proof performance due to the low spring characteristics is not impaired. It is possible to sufficiently secure the rubber volume of the pair of rubber elastic bodies. As a result, the anti-vibration support function of the exhaust pipe can be realized with sufficient durability while ensuring excellent anti-vibration performance.

  According to a second aspect of the present invention, in the muffler support according to the first aspect, the inner mounting member has a linearly extending shaft shape, while the outer mounting member is paired on both sides of the bottom plate portion. The inner plate is formed in a groove shape in which the inner plate is integrally formed, and the inner mounting member is disposed in a state of extending in the groove direction in the groove portion of the outer mounting member. The inner mounting member and the outer mounting member are elastically connected by the pair of rubber elastic bodies extending on both sides toward the pair of side plate portions.

  In the muffler support of this aspect, the inner mounting member is formed into an axial shape and the axial length is secured, so that the rubber elastic body is inclined to elastically connect between the opposed surfaces of the inner mounting member and the pair of opposed plate portions. The portion can be inclined more greatly toward the axial direction of the inner mounting member. As a result, by setting the shear component of the rubber elastic body in a displacement direction in which the inner mounting member is approached / separated in the direction perpendicular to the axis with respect to the pair of opposing plate portions, the spring characteristics are made softer. It is possible to further improve the mounting workability.

  According to a third aspect of the present invention, there is provided the muffler support according to the first or second aspect, and in the pair of rubber elastic bodies, the orthogonal direction to the facing direction of the pair of opposing plate portions, respectively. Are provided with opposite inclined portions which are inclined in opposite directions to make a pair.

  In the muffler support of this aspect, when a load is applied between the inner mounting member and the outer mounting member and the both mounting members are relatively displaced, the rubber elastic body is provided with an inclined portion, The force in the twisting direction that may be exerted between the inner mounting member and the outer mounting member as the elastic reaction force of the elastic body can be effectively reduced by the canceling action of the opposite inclined portion. Therefore, for example, the support load or vibration load of the exhaust pipe that is input in a substantially vertical direction, the mounting load that is caused by the relative displacement between the exhaust pipe side and the vehicle body side that is input in a substantially horizontal direction, etc. Even when it is exerted between the member and the outer mounting member, the direction of the mounting portion of the inner mounting member or the outer mounting member to the exhaust pipe or the vehicle body is maintained, and the action of the force in the twisting direction to the exhaust pipe or the vehicle body is maintained. This suppresses the target vibration-proofing effect stably, and can alleviate problems such as strain concentration in the rubber elastic body.

  In particular, since the opposite inclined portion cooperates to share the required exhaust pipe support load and anti-vibration load, the total volume of the opposite inclined portion is provided with an inclined portion in a single direction. Compared to the rubber elastic body of the muffler support and the rubber elastic body of the muffler support having a conventional structure as described in Patent Document 1, the required characteristics of vibration-proof performance and durability are almost the same volume. It can be achieved and does not increase significantly.

  According to a fourth aspect of the present invention, in the muffler support according to the third aspect, the opposite inclined portions that are inclined in opposite directions to form a pair are separated from each other in the support load input direction of the exhaust pipe. And the structure provided in the state which at least one part overlaps by projection of this support load input direction is employ | adopted.

  In the muffler support of this aspect, the opposite inclined part is provided so as to be positioned vertically in the vertical direction in the mounted state that becomes the support load input direction of the exhaust pipe, thereby reducing the size of the muffler support component in the horizontal direction. Can be In addition, as described above, the opposite inclined portion can cooperate to share the exhaust pipe support load and vibration isolation load. Therefore, the muffler support of this aspect is also perpendicular to the muffler support of the conventional structure. There is no significant increase in size.

  According to a fifth aspect of the present invention, in the muffler support according to any one of the first to fourth aspects, the pair of rubber elasticity extending further on both sides from the inner mounting member toward the pair of opposed plate portions. A structure is adopted in which the body is the inclined portion over the entire length between the inner mounting member and the opposing plate portion.

  In the muffler support of this aspect, since the volume of the inclined portion can be ensured with respect to the entire volume of the rubber elastic body, the above-mentioned operational effects of the inclined portion can be more effectively exhibited.

  In the muffler support having the structure according to the present invention, the rubber elastic body connecting the inner mounting member and the outer mounting member is provided with a specific inclined portion, so that the vertical direction which is the main input direction of the exhaust pipe support load and vibration load is provided. Not only in the direction but also in the front-rear direction and the left-right direction, which are horizontal directions, a shear component is effectively generated in the rubber elastic body, and a soft spring characteristic is exhibited. Therefore, both excellent vibration-proof performance due to the low spring characteristics exhibited against vibration in the vertical direction of the vehicle and excellent durability performance due to the rubber volume that can be secured while maintaining the low spring characteristics are exhibited. In addition, the relative displacement in the horizontal direction between the inner mounting member and the outer mounting member is easily allowed under low spring rigidity, so that the relative dimensional variations of the mounting positions on the exhaust pipe side and the vehicle body side can be accommodated. The improved mounting workability can be effectively achieved.

The front view of the muffler support as 1st embodiment of this invention. The top view of the muffler support shown by FIG. The right view of FIG. The top view of the muffler support as 2nd embodiment of this invention. The top view of the muffler support as 3rd embodiment of this invention. The front view of the muffler support as 4th embodiment of this invention. The top view of the muffler support shown by FIG.

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

  1 to 3 show a muffler support 10 as a first embodiment of the present invention. The muffler support 10 has a structure in which an inner mounting member 12 and an outer mounting member 14 are elastically connected by a pair of rubber elastic bodies 16 and 16. And while the inner attachment member 12 is fixedly attached to the exhaust pipe 18, the outer attachment member 14 is fixedly attached to the vehicle body 20 of the vehicle, so that the intermediate portion in the longitudinal direction of the exhaust pipe 18 is provided. Anti-vibration support is provided for the vehicle body 20.

  In the following description, the vertical direction means, in principle, the vertical direction in FIG. 1 which is a substantially vertical vertical direction when the vehicle is mounted. Further, the left-right direction in FIG. 1 which is almost horizontal when mounted on the vehicle is referred to as the left-right direction, and the direction perpendicular to the paper surface of FIG. 1 is referred to as the front-rear direction. In the actual vehicle mounting state, either the left-right direction or the front-rear direction in the description may be the left-right direction of the vehicle or the front-rear direction of the vehicle. It may be an oblique direction inclined with respect to the front-rear direction.

  In addition, in the mounting state on the automobile, a shared support load of the exhaust pipe 18 is exerted between the inner mounting member 12 and the outer mounting member 14. As a result, the rubber elastic bodies 16, 16 are elastically deformed, and the inner mounting member 12 is positioned relative to the outer mounting member 14 with a predetermined relative displacement downward.

  More specifically, the inner shaft member 12 is a shaft-shaped metal fitting that extends linearly with a constant cross-sectional shape in the front-rear direction in the mounted state, and a mounting hole 22 that extends through in the axial direction is formed on the central axis. Is formed. The outer peripheral surface of the inner shaft member 12 is formed as substantially parallel surfaces 24 and 24 whose upper portions on both sides extend vertically, while the lower portions on both sides are downward inclined surfaces 26 and 26 whose width dimension gradually decreases downward. Yes. Further, the mounting hole 22 of the inner shaft member 12 is provided with irregularities extending in the axial direction, and has a petal-shaped cross-sectional shape as a whole.

  As shown by phantom lines in FIG. 1, a hook-shaped (reverse L-shaped) mounting shaft 28 fixed to the exhaust pipe 18 is fitted into the mounting hole 22 of the inner shaft member 12 and is necessary. It is attached by being fixed with a bolt etc. according to. The outer peripheral surface of the mounting shaft 28 is provided with irregularities corresponding to the inner peripheral surface of the mounting hole 22 so that rotation of the mounting shaft 28 around the central axis relative to the inner shaft member 12 is prevented. Yes.

  On the other hand, the outer mounting member 14 is formed by, for example, pressing a band plate-shaped metal fitting, and a pair of rising portions that rise upward on both sides in the length direction of the flat bottom plate portion 30 extending in the left-right direction. A pair of left and right side plate portions 32, 32 as opposing plate portions are formed in a groove shape. The bottom plate portion 30 and the side plate portions 32, 32 extend with a substantially constant width dimension that is substantially the same as the axial length of the inner shaft member 12. Further, the bottom plate portion 30 and the side plate portions 32, 32 are provided with reinforcing ribs 34 extending substantially along the entire length in the width direction. Furthermore, the upper portions 32 a and 32 a of the pair of side plate portions 32 and 32 extend substantially in parallel in the vertical direction, and are opposed to the parallel surfaces 24 and 24 of the inner shaft member 12. On the other hand, the lower portions 32b and 32b of the pair of side plate portions 32 and 32 are inclined so that the opposing distance gradually decreases downward and are opposed to the inclined surfaces 26 and 26 of the inner shaft member 12. I'm hurt.

  Further, the outer mounting member 14 is integrally formed with mounting plate portions 36, 36 that horizontally spread outward from the upper end edge portions of the side plate portions 32, 32. Bolt holes 38, 38 are provided in the respective central portions of the mounting plate portions 36, 36, and fixing bolts (not shown) are inserted into the bolt holes 38 and screwed into the vehicle body 20, whereby both side plate portions are provided. 32 and 32 are fixed to the vehicle body 20 by bolts. In addition, between each side board part 32 and the attachment board part 36, the reinforcement pieces 40 and 40 extended ranging between both width direction edge parts are integrally formed.

  And with respect to the outer mounting member 14 having a groove shape extending in the front-rear direction, the inner mounting member 12 extends in the front-rear direction at a position away from the bottom by a predetermined distance at the center portion in the width direction in the groove portion. It is arranged. Further, a pair of rubber elastic bodies 16, 16 are disposed on the left and right sides of the inner mounting member 12 sandwiched in the direction perpendicular to the axis, and the left and right side surfaces of the inner mounting member 12 and the left and right side plates of the outer mounting member 14 are disposed. The opposing surfaces of the portions 32 and 32 are elastically connected by the pair of rubber elastic bodies 16 and 16.

  The rubber elastic body 16 of the present embodiment is composed of an upper rubber elastic body 16a and a lower rubber elastic body 16b that are arranged in an independent state with a predetermined space 41 in the thickness direction which is the vertical direction in FIG. It is configured. The upper rubber elastic body 16 a and the lower rubber elastic body 16 b are integrally formed of the same rubber material, and both are fixed to the inner mounting member 12 and the outer mounting member 14, and the inner mounting member 12. The muffler support 10 of this embodiment is configured as an integrally vulcanized molded product of the rubber elastic bodies 16 and 16 including the outer mounting member 14.

  The upper rubber elastic body 16a is disposed across the opposing surface between the parallel surface 24 of the inner mounting member 12 and the upper portion 32a of the side plate portion 32 of the outer mounting member 14, while the lower rubber The elastic body 16b is disposed across the opposing surfaces of the inclined surface 26 of the inner mounting member 12 and the lower portion 32b of the side plate portion 32 of the outer mounting member 14. Further, the upper rubber elastic body 16a and the lower rubber elastic body 16b are set to have substantially the same rubber volume.

  Furthermore, as shown in FIG. 1, when viewed from the front in the front-rear direction, the upper rubber elastic body 16a and the lower rubber elastic body 16b have substantially the same shape, and linear elasticity that extends parallel to each other. A main shaft extends between opposing surfaces of the inner mounting member 12 and the outer mounting member 14. In particular, in the present embodiment, both the upper rubber elastic body 16a and the lower rubber elastic body 16b are provided with an elastic main shaft that is inclined downward from the inner mounting member 12 toward the side plate portions 32, 32 of the outer mounting member 14. Yes.

  On the other hand, as shown in FIG. 2, the upper rubber elastic body 16 a and the lower rubber elastic body 16 b have substantially the same width in the plan view in the vertical direction, but the axial direction of the inner mounting member 12. In the front-rear direction, the elastic main shafts extend linearly so as to intersect with each other toward the opposite sides, and extend between opposing surfaces of the inner mounting member 12 and the outer mounting member 14.

  The pair of upper and lower rubber elastic bodies 16a, 16a on both the left and right sides sandwiching the inner mounting member 12 in the direction perpendicular to the axis is either one in the vehicle longitudinal direction from the inner mounting member 12 to the left and right side plate portions 32, 32. It inclines in the direction extended toward the side. On the other hand, the pair of lower rubber elastic bodies 16b, 16b on both the left and right sides sandwiching the inner mounting member 12 in the direction perpendicular to the axis are both in the vehicle front-rear direction from the inner mounting member 12 to the left and right side plate portions 32, 32. It inclines in the direction extended toward the other side.

  In particular, in the present embodiment, the amount of displacement in the front-rear direction of each fixing position between the upper rubber elastic body 16 a and the lower rubber elastic body 16 b is larger in the inner mounting member 12 than in the outer mounting member 14. Thereby, the fixed surface of the rubber elastic body 16 with respect to the inner mounting member 12 is set to be large in the axial direction, so that the rubber elastic body 16 can prevent the inner mounting member 12 from being tilted in the vertical direction (displacement in the twisting direction). Spring rigidity is more effectively exhibited.

  With the muffler support 10 having such a structure, a shared support load of the exhaust pipe 18 is vertically applied between the inner mounting member 12 and the outer mounting member 14 in the mounted state. Then, the rubber elastic bodies 16 and 16 are elastically deformed by such a shared load, whereby the inner mounting member 12 is positioned relative to the outer mounting member 14 by a predetermined amount relative to the lower side, and in FIG. The inner mounting member 12 is positioned substantially at the center in the recessed groove of the outer mounting member 14.

  In this state, when main vibrations to be vibrated are applied in the vertical direction, a pair of upper and lower rubber elastic bodies 16a and 16a and a lower rubber elastic body 16b constituting the pair of rubber elastic bodies 16 and 16, Based on the elastic deformation with 16b, the inner mounting member 12 is elastically displaced with respect to the outer mounting member 14, and the intended vibration isolation effect is exhibited. Further, when the vibration is input, the pair of upper and lower upper rubber elastic bodies 16a and 16a and the lower rubber elastic bodies 16b and 16b constituting the pair of rubber elastic bodies 16 and 16 are substantially sheared and deformed. A soft spring characteristic is exhibited and an excellent vibration insulation effect can be obtained.

  Further, in an automobile, due to superposition of dimensional errors and assembly errors in various components of the exhaust pipe 18 and the vehicle body 20, there is a gap between the exhaust pipe 18 and the fixing screw hole of the vehicle body 20 in the mounting portion of the muffler support 10. The relative displacement is likely to occur. Such displacement is caused by relatively displacing the inner mounting member 12 and the outer mounting member 14 when the muffler support 10 is mounted, and mounting the inner mounting member 12 and the outer mounting member 14 to the exhaust pipe 18 and the vehicle body 20 respectively. It will correspond.

  At that time, in the muffler support 10 having the above-described structure, since the upper and lower rubber elastic bodies 16a and 16b constituting the rubber elastic body 16 have inclined portions in plan view, the inner mounting member 12 and the outer mounting member The rubber elastic bodies 16 and 16 are elastically deformed with a shear component not only in the vertical vertical direction but also in the front-rear direction and the horizontal direction that are horizontal orthogonal directions. Therefore, relative displacement of the inner mounting member 12 and the outer mounting member 14 in the front-rear direction and the left-right direction can be easily permitted under the small spring rigidity of the rubber elastic bodies 16, 16. The muffler support 10 can be attached to the automobile with good workability by dealing with the relative displacement between the exhaust pipe 18 and the fixing screw hole of the vehicle body 20.

  In addition, in the muffler support 10 of the present embodiment, the upper and lower rubber elastic bodies 16a and 16b are inclined in opposite directions in the front-rear direction that is orthogonal to the opposing direction of the pair of opposing plate portions in plan view. Since it is provided with the opposite inclined portion, it is twisted between the mounting members 12, 14 when a load in the vertical direction, the front-rear direction, and the left-right direction is exerted between the inner mounting member 12 and the outer mounting member 14. The relative displacement in the direction is suppressed in an offset manner. In particular, in this embodiment, since the upper and lower rubber elastic bodies 16a and 16b are substantially the same rubber volume and are formed symmetrically with respect to the horizontal direction line, the effect of canceling the twisting direction displacement at the time of load input is obtained. Is more effective. As a result, the inner mounting member 12 and the outer mounting member 14 are relatively displaced when the exhaust pipe 18 is supported and when the relative displacement between the exhaust pipe 18 and the fixing screw hole of the vehicle body 20 is dealt with. At the same time, the external force action in the twisting direction on the exhaust pipe 18 is avoided, and stress concentration in the rubber elastic body 16 can be reduced.

  Further, as described above, in the muffler support 10 of the present embodiment, not only the vertical direction as the vibration input direction of the exhaust pipe 18 but also the support of the exhaust pipe 18 and the screw holes for fixing the exhaust pipe 18 and the vehicle body 20 are fixed. Since the elastic deformation of the rubber elastic bodies 16 and 16 is caused by a shearing component even when displaced in the front-rear direction and the left-right direction in which an external force is exerted when dealing with the relative positional deviation, The rubber volume can be sufficiently secured while achieving the low spring characteristics required in each direction, and as a result, excellent durability can be realized.

  Furthermore, the muffler support 10 of the present embodiment is configured such that the inner mounting member 14 has an axial shape and the axial length is ensured, so that the space between the opposed surfaces of the inner mounting member 14 and the pair of side plate portions 32 and 32 is increased. It is possible to make the inclined portions of the rubber elastic bodies 16, 16 that elastically connect each other more greatly inclined in the axial direction of the inner mounting member 14. Therefore, the shear component of the rubber elastic body in the left-right direction in which the inner mounting member 14 is displaced / displaced in the direction perpendicular to the axis with respect to the pair of side plate portions 32, 32 is set to be larger, and the spring characteristics are made softer. This makes it possible to further improve the mounting workability.

  Next, in the muffler support 10 of the first embodiment described above, other specific examples that can be adopted as the pair of rubber elastic bodies 16 and 16 will be described below as second to fourth embodiments. In the following embodiments, the same reference numerals as those in the first embodiment are assigned to the members and parts having the same structure as in the first embodiment, and detailed description thereof is omitted. Moreover, although the muffler support shown by each following embodiment is not described anew, it can exhibit the same effect as 1st embodiment.

  The muffler support 42 of the second embodiment shown in FIG. 4 and the muffler support 44 of the third embodiment shown in FIG. 5 are both compared to the muffler support 10 of the first embodiment. The upper rubber elastic body 16a and the lower rubber elastic body 16b constituting the pair of rubber elastic bodies 16 and 16 are shown as other examples of shapes in plan view.

  First, in the second embodiment shown in FIG. 4, the upper and lower rubber elastic bodies 16 a and 16 b of the muffler support 42 are in the length direction extending between the opposing surfaces of the inner mounting member 12 and the outer mounting member 14. Both end portions of the inner mounting member 12 side and the outer mounting member 14 side are non-inclined portions 46 and 48 extending linearly in the direction perpendicular to the axis of the inner mounting member 12, respectively. And the intermediate part of the length direction in the upper and lower rubber elastic bodies 16a, 16b located between these non-inclined portions 46, 48 is directed toward the opposite sides in the front-rear direction (vertical direction in FIG. 4). The inclined portions 50 and 50 are inclined and extended at substantially the same angle. In the present embodiment, the inclined portions 50, 50 in the upper and lower rubber elastic bodies 16a, 16b form a pair to constitute the opposite inclined portion.

  In this way, by adjusting the length of the inclined portion 50 to an appropriate size in the length direction of the upper and lower rubber elastic bodies 16a, 16b, the inner mounting member 12 and the outer mounting member 14 can be relatively moved in the left-right direction. The size of the shear component exerted on the rubber elastic bodies 16 and 16 with respect to the displacement and the left and right spring characteristics exerted by the rubber elastic bodies 16 and 16 are determined by the rubber volume and the vertical direction of the rubber elastic bodies 16 and 16. The change tuning can be performed while keeping the spring characteristics of the substantially constant.

  In the third embodiment shown in FIG. 5, the upper and lower rubber elastic bodies 16 a and 16 b of the muffler support 44 both extend between the opposing surfaces of the inner mounting member 12 and the outer mounting member 14. In the direction, it is curved in a substantially arc shape in the front-rear direction (vertical direction in FIG. 5), and an inclined portion is constituted by such a curve. In particular, in the present embodiment, the upper and lower rubber elastic bodies 16a, 16b are both curved with a substantially constant cross-sectional shape (width dimension) and extended over the entire length in the length direction, so that the entire length is curved. It is considered a part. In addition, it is also possible to configure inclined portions inclined to opposite sides in the front-rear direction on both sides (the inner mounting member 12 side and the outer mounting member 14 side) across the inflection point located in the central portion in the length direction. It is. In the present embodiment, the inclined portions of the upper and lower rubber elastic bodies 16a and 16b make a pair to constitute the opposite inclined portion.

  Furthermore, in the muffler support 44 of the present embodiment, the upper rubber elastic body 16a and the lower rubber elastic body 16b are set so that their bending directions are opposite to each other in the front-rear direction. As a result, the force component in the twisting direction exerted between the inner mounting member 12 and the outer mounting member 14 as the elastic reaction force of the rubber elastic bodies 16 and 16 at the time of load input in the left-right direction and the front-rear direction is more effective. Offsetting can be mitigated.

  Further, FIGS. 6 to 7 show a muffler support 52 as a fourth embodiment of the present invention. The muffler support of the present embodiment also shows another aspect of the rubber elastic bodies 16 and 16 as compared with the first embodiment, and with respect to members and parts having the same structure as the first embodiment. Are denoted by the same reference numerals as in the first embodiment, and detailed description thereof is omitted.

  In the muffler support 52 of this embodiment, the pair of rubber elastic bodies 16, 16 that connect the inner mounting member 12 and the outer mounting member 14 are respectively opposite to each other in the front-rear direction that is the axial direction of the inner mounting member 12. The first rubber elastic body 16a and the second rubber elastic body 16b are inclined and extended toward the front. In particular, in the present embodiment, the first rubber elastic body 16a and the second rubber elastic body 16b are arranged on both sides in the axial direction of the inner mounting member 12 from the central portion in the front-rear direction of the outer mounting member 14 toward the inner mounting member 12. Each of them extends linearly so as to open toward each other.

  The first rubber elastic body 16a and the second rubber elastic body 16b are symmetrical with respect to the axis-perpendicular direction line of the inner mounting member 12 as shown in the plan view shown in FIG. It is said that. In addition, the first rubber elastic body 16a and the second rubber elastic body 16b both extend linearly with a substantially constant cross-sectional shape, and the rubber volume is substantially the same. In other words, in the present embodiment, the first rubber elastic body 16a and the second rubber elastic body 16b are each formed with an inclined portion by the total length.

  In the muffler support 52 of this embodiment, the first and second rubber elastic bodies 16a having inclined portions as opposite inclined portions that are inclined in opposite directions in the axial direction of the inner mounting member 12 to form a pair. 16b is provided so as to overlap in the front view shown in FIG. 6, and the overall rubber volume of the main rubber elastic bodies 16 and 16 is secured, and the dimension in the height direction in FIG. 6 is set small. Is also possible. Based on the elastic deformation action of the first and second rubber elastic bodies 16a and 16b, there is a problem of lowering durability due to lower spring of the rubber material itself and a decrease in rubber volume, and spring characteristics in the vibration input direction. This reduces the difficulty of mounting work due to relative dimensional variations in the mounting positions of the exhaust pipe 18 and the vehicle body 20 during mounting without causing problems such as a reduction in vibration-proof performance due to the increase in springs. It goes without saying that the same technical effects as the muffler support 10 of the first embodiment can be achieved.

  As mentioned above, although some embodiment of this invention has been explained in full detail, these are illustrations to the last and this invention is not interpreted limitedly by the specific description in this embodiment. For example, when there is no problem with the twisting direction force exerted between the inner mounting member 12 and the outer mounting member 14 due to elastic deformation of the rubber elastic body, the rubber elastic body in the first to fourth embodiments is used. Only one of the rubber elastic bodies 16a and 16b configured by cooperating 16 may be adopted.

  Even when two rubber elastic bodies 16a and 16b inclined in opposite directions are employed as the rubber elastic body 16, the inclination angle, the length of the inclined portion, the cross-sectional area, and the shape of the two rubber elastic bodies 16a and 16b are used. It is also possible to make them different from each other. In particular, when the total lengths of the two rubber elastic bodies 16a and 16b are different due to the shape of the inner mounting member 12 and the outer mounting member 14, the lengths and cross-sectional areas of the inclined portions of the two rubber elastic bodies 16a and 16b are different. , The shape and the like can be positively changed so that the canceling action in the twisting direction can be efficiently exhibited.

  Further, the rubber elastic body 16 is configured by providing two or more sets of rubber elastic bodies 16a and 16b each provided with inclined portions inclined in opposite directions as shown in the embodiment. Is also possible.

  The specific shapes of the inner mounting member 12 and the outer mounting member 14 are appropriately changed depending on the exhaust pipe, the mounting structure to the vehicle body, and the like. For example, in addition to the shaft shape illustrated as the inner mounting member, a block shape A cylindrical shape or the like can be employed, and a pair of opposing plate portions in the outer mounting member can be configured as independent members.

10, 42, 44, 52: Muffler support, 12: Inner mounting member, 14: Outer mounting member, 16: Rubber elastic body, 16a: Upper rubber elastic body (rubber elastic body), 16b: Lower rubber elastic body (rubber Elastic body), 18: exhaust pipe, 20: vehicle body, 30: bottom plate portion, 32: side plate portion (opposite plate portion), 50: inclined portion

Claims (5)

An inner mounting member attached to the exhaust pipe is disposed between a pair of opposing plate portions provided on an outer mounting member attached to the vehicle body, and extends from the inner mounting member toward the pair of opposing plate portions on both sides. In the muffler support provided with a pair of rubber elastic bodies,
Each of the pair of rubber elastic bodies is inclined sideways with respect to the opposing direction of the pair of opposing plate portions, and has a shearing component when the inner mounting member is moved toward and away from the opposing plate portion. A muffler support characterized by an inclined part that can be elastically deformed. While the inner mounting member has a linearly extending shaft shape, the outer mounting member has a groove shape in which a pair of side plate portions are integrally formed on both sides of the bottom plate portion,
The pair of inner mounting members disposed in a groove direction of the outer mounting member in the groove direction and extending from the inner mounting member toward both sides toward the pair of side plate portions as the pair of opposing plate portions. The muffler support according to claim 1, wherein the inner mounting member and the outer mounting member are elastically connected by a rubber elastic body.   3. The muffler support according to claim 1, wherein each of the pair of rubber elastic bodies is provided with opposite inclined portions that are inclined in opposite directions in the direction orthogonal to the opposed direction of the pair of opposed plate portions to form a pair. .   The opposite inclined portions that are inclined in opposite directions to form a pair are separated from each other in the support load input direction of the exhaust pipe, and are provided in a state where at least a part thereof is overlapped by projection in the support load input direction. The muffler support according to Item 3.   The pair of rubber elastic bodies extending on both sides from the inner mounting member toward the pair of opposing plate portions are respectively inclined portions over the entire length between the inner mounting member and the opposing plate portion. The muffler support according to any one of claims 1 to 4.

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