JP6909571B2 - Anti-vibration device - Google Patents

Description

The present invention relates to a vibration isolator used in, for example, an engine mount of an automobile.

Conventionally, an anti-vibration device has been known as a type of anti-vibration support or anti-vibration connecting body which is interposed between members constituting a vibration transmission system and connects these members with each other. Is being considered for application to engine mounts, etc. As disclosed in Japanese Patent No. 5543047 (Patent Document 1) and the like, the anti-vibration device has a main body rubber in which a first mounting member is fixed to an axial end surface of a tubular main body rubber elastic body. The tubular portion of the second mounting member is fixed to the outer peripheral surface of the elastic body, and the first mounting member and the second mounting member have a structure in which the first mounting member and the second mounting member are elastically connected to each other by the main body rubber elastic body.

By the way, in the vibration isolator of Patent Document 1, a rod member is inserted into the rubber elastic body of the main body from below, and a bolt portion provided on the upper part of the rod member is inserted into a bolt insertion hole of the first mounting member. The first mounting member is fixed to the rod member by being screwed to the nut.

However, when the rod member has a significantly smaller diameter than the inner hole of the rubber elastic body of the main body, the bolt portion is first at a position shifted in the direction perpendicular to the axis with respect to the bolt insertion hole of the first mounting member. There was a risk that the bolt portion would be caught without being inserted into the bolt insertion hole due to being brought close to the mounting member of.

In Patent Document 1, the stopper member extrapolated to the rod member and housed in the inner hole of the rubber elastic body of the main body functions as a spacer, so that the relative position of the rod member with respect to the first mounting member is in the direction perpendicular to the axis. It is possible to prevent a large deviation from each other, and the bolt portion of the rod member can be easily inserted into the bolt insertion hole of the first mounting member. However, such a stopper member may be caught in the rubber elastic body of the main body at the time of assembly, and the manufacturing workability may be deteriorated. Further, the stopper member may not be provided depending on the required characteristics and the like. In such a case, if a special spacer corresponding to the stopper member of Patent Document 1 is provided, the number of parts and the weight increase. At the same time, the spacer may affect the deformation characteristics of the rubber elastic body of the main body, and the desired anti-vibration performance may not be obtained.

Japanese Patent No. 5543047

The present invention has been made in the background of the above circumstances, and the problem to be solved is a novel invention in which the bolt portion of the member to be connected can be easily inserted into the bolt insertion hole of the first mounting member. The purpose is to provide a structural vibration isolator.

Hereinafter, aspects of the present invention made to solve such problems will be described. The components adopted in each of the following aspects can be adopted in any combination as much as possible.

First, the present inventor examined making the inner hole of the rubber elastic body of the main body a small diameter in order to define the position of the member to be connected with respect to the first mounting member in the direction perpendicular to the axis. However, if the inner hole of the main body rubber elastic body is simply reduced in diameter, the main body rubber elastic body becomes thicker and the inner peripheral surface of the main body rubber elastic body is restrained by the connecting target member over the entire circumference. It has become clear that the spring in the direction perpendicular to the axis becomes stiff and adversely affects the anti-vibration performance. Therefore, the present invention has been made by further studying a structure capable of easily guiding the bolt portion of the member to be connected to the bolt insertion hole of the first mounting member while suppressing the influence on the spring characteristics in the direction perpendicular to the axis. rice field.

That is, in the first aspect of the present invention, the first mounting member is fixed to the axial end surface of the tubular main body rubber elastic body provided with the inner hole, and the second is attached to the outer peripheral surface of the main body rubber elastic body. The first mounting member and the second mounting member have a structure in which the first mounting member and the second mounting member are elastically connected by the main body rubber elastic body, and the first mounting member is axially connected to the first mounting member. A bolt insertion hole is formed through the inner hole of the rubber elastic body of the main body to open with a size smaller than the inner hole, and a bolt provided in the member to be connected to be inserted into the inner hole. In a state where the portion is inserted into the bolt insertion hole, the first mounting member is directly tightened and fixed to the bolt portion with a nut without passing through the main body rubber elastic body to the connecting target member. In the anti-vibration device as described above, the inner surface of the peripheral wall of the inner hole of the rubber elastic body of the main body protrudes toward the inner peripheral side at a height not reaching the bolt insertion hole, and the bolt insertion hole is formed from the inner hole. A plurality of contact convex portions for guiding the bolt portion to be inserted into the bolt portion are provided in the circumferential direction, and the outer periphery of the contact convex portion is formed between the plurality of contact convex portions in the circumferential direction. It is characterized in that it is recessed to the side and the diameter is expanded, and a relief recess is provided to form a gap between the member to be connected and the member to be connected.

In the anti-vibration device having a structure according to the first aspect, the outer peripheral surface of the member to be connected including the bolt portion inserted into the inner hole of the main body rubber elastic body protrudes to the inner peripheral surface of the main body rubber elastic body. By being guided by sliding contact with the formed contact convex portion, when the bolt portion of the member to be connected is inserted into the bolt insertion hole of the first mounting member, the bolt portion is inserted into the bolt insertion hole. It is positioned within a predetermined range that can be inserted. As a result, the bolt portion is inserted without being caught in the bolt insertion hole, and the member to be connected and the first mounting member are easily and surely connected.

Further, since the plurality of relief recesses are formed, the contact protrusions are not continuous over the entire circumference in the circumferential direction, and the plurality of contact protrusions arranged across the relief recesses are arranged in the circumferential direction. They are located apart from each other. Therefore, even if the contact convex portion is compressed by the vibration input in the direction perpendicular to the axis, the bulging deformation of the contact convex portion on both sides in the circumferential direction is allowed by the escape recess. It is possible to prevent the spring in the direction perpendicular to the axis of the vibration isolator from becoming stiff due to the provision of the contact convex portion, and it is possible to realize excellent vibration isolation performance.

A second aspect of the present invention is the anti-vibration device according to the first aspect, which includes the connecting target member provided with the bolt portion, and the inner peripheral end surface of the contact convex portion. virtual radial dimensional difference between the diameter of the circumference of the diameter and the bolt insertion hole, the maximum and minimum diameters of the tapered surface whose diameter decreases toward the tip is set to the tip portion of the bolt portion but situated It is characterized in that it is made smaller than the radial dimensional difference of the above , and is combined with the connecting target member .

According to the second aspect, when the bolt portion is inserted into the inner hole of the rubber elastic body of the main body, the outer peripheral surface of the bolt portion abuts on the inner peripheral side end surface of the contact convex portion and is positioned. The opening peripheral edge of the bolt insertion hole in one mounting member comes into contact with the tapered surface of the tip portion of the bolt portion. As a result, the bolt portion is guided to the bolt insertion hole, and the bolt portion can be easily inserted into the bolt insertion hole.

A third aspect of the present invention is that in the vibration isolator described in the first or second aspect, the four contact protrusions are formed so as to protrude on the inner surface of the peripheral wall of the inner hole of the rubber elastic body of the main body. The relief recesses are provided between the four contact convex portions in the circumferential direction, and the four contact convex portions are substantially orthogonal to each other on the inner surface of the peripheral wall of the inner hole of the rubber elastic body of the main body. It is arranged on each side in two directions perpendicular to the axis.

According to the third aspect, by forming four contact convex portions in the circumferential direction, it becomes easy to prevent the circumferential length of each contact convex portion from becoming too long, and the contact convex portion can be prevented from becoming too long. The influence of the formation on the spring characteristics of the vibration isolator can be suppressed. In particular, by arranging the four contact convex portions on both sides in the two directions perpendicular to the axis substantially orthogonal to each other, it is possible to effectively prevent the circumferential length of the contact convex portions from becoming significantly long. ..

Further, by contacting the connection target member from both sides in two directions perpendicular to the axis orthogonal to the outer peripheral surface of the connection target member, the four contact convex portions can guide the connection target member more stably. The bolt portion of the member to be connected can be more reliably inserted into the bolt insertion hole of the first mounting member.

A fourth aspect of the present invention is that in the vibration isolator according to any one of the first to third aspects, the axial end surface of the contact convex portion on the opposite side of the first mounting member is formed. It is a tapered guide surface that gradually expands outward in the axial direction.

According to the fourth aspect, when the member to be connected is inserted into the inner hole of the rubber elastic body of the main body, when the bolt portion abuts on the axial end surface of the abutting convex portion, the bolt portion guides the abutting convex portion. Since it is guided to the inner peripheral side by the surface and guided to the bolt insertion hole of the first mounting member communicated with the inner hole, the insertion of the bolt portion into the bolt insertion hole becomes easier.

A fifth aspect of the present invention is the first attachment of the contact convex portion in the inner hole of the main body rubber elastic body in the vibration isolator according to any one of the first to fourth aspects. It is arranged at the end on the member side.

According to the fifth aspect, since the opening on the inner hole of the rubber elastic body on the opposite side of the first mounting member is not narrowed by the abutting convex portion, a large opening area is secured, so that the member to be connected is connected. Is easy to insert into the inner hole. Moreover, by positioning the connecting target member by the abutting convex portion at a position close to the bolt insertion hole of the first mounting member, the relative position of the connecting target member with respect to the first mounting member can be set more accurately, and the bolt can be set. Insertion of the portion into the bolt insertion hole is realized more easily and surely.

Further, if the contact convex portion is arranged outside the second mounting member in the axial direction, the influence of the contact convex portion on the spring characteristics in the direction perpendicular to the axis of the vibration isolator can be reduced more effectively. ..

A sixth aspect of the present invention is the first attachment of the contact convex portion in the inner hole of the main body rubber elastic body in the vibration isolator according to any one of the first to fourth aspects. It is provided near the end on the opposite side of the member.

According to the sixth aspect, since the guiding action by the contact convex portion is effectively exerted from the initial stage of insertion of the member to be connected to the inner hole of the rubber elastic body of the main body, the member to be inserted into the inner hole is in contact with the inner hole. It becomes easy to prevent the main body rubber elastic body from coming into contact with the inner peripheral surface at a position off the contact convex portion, and the durability of the main body rubber elastic body can be improved.

A seventh aspect of the present invention is the curvature in which the inner peripheral surface of the relief recess is continuously curved over the entire circumferential direction in the vibration isolator according to any one of the first to sixth aspects. It is supposed to be a face.

According to the seventh aspect, since the inner peripheral surface of the relief recess is a curved surface having no break points or break lines, the contact convex portion compressed in the direction perpendicular to the axis bulges and deforms in the circumferential direction. In this case, the stress is dispersed on the inner peripheral surface of the relief recess, and the durability is improved.

The eighth aspect of the present invention is the anti-vibration device according to any one of the first to seventh aspects, including the member to be connected to which the bolt portion is provided, and the vibration isolator. includes an insertion base consolidated member is inserted into the bore of the main rubber elastic body, is characterized in that the insert base is larger in diameter than the bolt portion, combined with the consolidated member It was done .

According to the eighth aspect, by sandwiching the first mounting member between the insertion base having a diameter larger than that of the bolt portion and the nut screwed to the bolt portion, the first mounting member is connected to the member to be connected. Is fixed to.

In the ninth aspect of the present invention, in the vibration isolator described in the eighth aspect, the contact convex portion of the rubber elastic body of the main body directly guides the bolt portion of the connecting target member. In a state of being mounted on the vehicle in which the first mounting member is fixed to the connecting target member, the outer peripheral surface of the insertion base portion of the connecting target member arranged in the inner hole of the main body rubber elastic body. Is in contact with the inner peripheral end surfaces of the plurality of contact convex portions, and the relief recesses provided between the plurality of contact convex portions in the circumferential direction are arranged apart from the outer peripheral surface of the insertion base portion. ..

According to the ninth aspect, in the mounted state on the vehicle, the outer peripheral surface of the insertion base portion having a diameter larger than that of the bolt portion is in contact with the end surface on the inner peripheral side of the contact convex portion, whereby the shaft Abnormal noise caused by the member to be connected hitting the inner peripheral surface of the rubber elastic body of the main body at the time of vibration input in the right angle direction is prevented.

Further, when the amplitude of the input vibration is small, the abutting convex portion that has previously abuted on the insertion base is elastically deformed, so that a soft spring characteristic is exhibited. In particular, in a stationary state without vibration input, the relief recess provided between the circumferential directions of the contact convex portion is separated from the outer peripheral surface of the insertion base, so that the contact convex portion is elastically deformed when small amplitude vibration is input. Is allowed by the relief recesses, so that soft spring characteristics can be effectively obtained. On the other hand, when the amplitude of the input vibration is large, a non-linear hard spring characteristic can be obtained by setting the insertion base portion to abut on the inner peripheral surface of the rubber elastic body of the main body even at a portion outside the abutting convex portion. ..

A tenth aspect of the present invention is the anti-vibration device according to any one of the first to eighth aspects, wherein the anti-vibration device includes the connecting target member provided with the bolt portion, and the above-mentioned. the said bore of the main rubber elastic body, is positioned in the axis-perpendicular direction with than the bolt portion of said consolidated member sleeve having a larger diameter is inserted by being guided by the contact projecting portion, the connecting The target member includes an insertion base to be inserted into the sleeve disposed in the inner hole of the main body rubber elastic body, and the bolt part inserted into the bolt insertion hole corresponds to the main body rubber elastic body. It is combined with the connecting target member, characterized in that it is positioned by the tangent-convex portion and indirectly guided by the tangent-convex portion via the sleeve.

According to the tenth aspect, since the sleeve inserted into the inner hole of the rubber elastic body of the main body is positioned by the abutting convex portion, the connecting target member is inserted through the sleeve when the connecting target member is inserted into the sleeve. Indirectly guided by the contact convex portion, the bolt portion is positioned with respect to the bolt insertion hole.

Further, since the sleeve has a larger diameter than the bolt portion, the sleeve is not inserted into the bolt insertion hole of the first mounting member, and for example, the insertion tip of the sleeve comes into contact with the first mounting member. By inserting the sleeve up to, the sleeve can be easily placed in the proper position.

The eleventh aspect of the present invention is the vibration isolator according to the tenth aspect, wherein the main body rubber elasticity is obtained in a state of being mounted on the vehicle in which the first mounting member is fixed to the connecting target member. The outer peripheral surface of the sleeve arranged in the inner hole of the body abuts on the inner peripheral end surfaces of the plurality of contact convex portions, and the relief recess provided between the circumferential directions of the plurality of contact convex portions is the relief recess. It is arranged away from the outer peripheral surface of the sleeve.

According to the eleventh aspect, in the mounted state on the vehicle, the sleeve having a diameter larger than that of the bolt portion is in contact with the inner peripheral end surface of the contact convex portion in advance, so that the sleeve vibrates in the direction perpendicular to the axis. Abnormal noise caused by the sleeve hitting the inner peripheral end surface of the contact convex portion at the time of input is prevented.

Further, when the amplitude of the input vibration is small, the abutting convex portion that has previously come into contact with the insertion base via the sleeve is elastically deformed, so that a soft spring characteristic is exhibited. In particular, in a stationary state without vibration input, the relief recess provided between the circumferential directions of the contact convex portion is separated from the outer peripheral surface of the sleeve, so that the elastic deformation of the contact convex portion is missed when a small amplitude vibration is input. Allowed by the recesses, soft spring properties can be effectively obtained. On the other hand, when the amplitude of the input vibration is large, if the insertion base is set to abut on the inner peripheral surface of the rubber elastic body of the main body even at the portion deviating from the abutting convex portion via the sleeve, a non-linear hard spring characteristic can be obtained. You can also get it.

A twelfth aspect of the present invention is the anti-vibration device according to any one of the first to eleventh aspects, which includes the connecting target member provided with the bolt portion. as characterized in that the inner circumferential surface of the bolt insertion hole is a fitting surface fitted to the base end portion of the bolt portion of the consolidated member, but combined with the consolidated member ..

According to the twelfth aspect, the base end portion of the bolt portion is fitted to the fitting surface of the bolt insertion hole, so that the first mounting member and the member to be connected are held in a mutually positioned state. For example, problems such as loosening of the nut due to deformation due to deterioration of the rubber elastic body of the main body are avoided, and reliability is improved.

According to the present invention, a plurality of abutting convex portions formed so as to project on the inner surface of the peripheral wall of the inner hole of the main body rubber elastic body allow the member to be connected to be a first mounting member when the main body rubber elastic body is inserted into the inner hole. Since it is positioned with respect to the bolt insertion hole, the bolt portion of the member to be connected is inserted into the bolt insertion hole without being caught in the peripheral portion of the opening of the bolt insertion hole in the first mounting member. In addition, concave relief recesses are formed between the circumferential directions of the plurality of contact convex portions arranged side by side in the circumferential direction, and the deformation of each contact convex portion to the outside in the circumferential direction is caused by the relief recesses. By being allowed, it is possible to set a soft spring characteristic for each contact convex portion with respect to the input in the direction perpendicular to the axis.

It is sectional drawing which shows the engine mount as the 1st Embodiment of this invention, and is the figure corresponding to the II sectional | cross section of FIG. FIG. 1 is a sectional view taken along line II-II of FIG. The bottom view of the engine mount shown in FIG. FIG. 5 is a cross-sectional view showing the engine mount shown in FIG. 1 with the inner connecting member and the outer connecting member mounted. It is a figure explaining the process of attaching the inner connecting member to the engine mount shown in FIG. 1, and is the figure which shows the state which the bolt part came into contact with the guide surface of the contact convex part. It is a figure explaining the process of attaching the inner connecting member to the engine mount shown in FIG. 1, and is the figure which shows the state in which the tapered surface of a bolt part is in contact with the opening peripheral edge of a bolt insertion hole. FIG. 5 is a cross-sectional view showing an engine mount as a second embodiment of the present invention. The bottom view of the integrally vulcanized molded product of the main body rubber elastic body constituting the engine mount shown in FIG. 7. FIG. 8 is a cross-sectional view taken along the line IX-IX of FIG. FIG. 9 is a cross-sectional view taken along the line XX of FIG. FIG. 10 is a cross-sectional view taken along the line XI-XI of FIG. FIG. 9 is a cross-sectional view illustrating a process of attaching a sleeve to the integrally vulcanized molded product shown in FIG. FIG. 6 is a cross-sectional view showing the engine mount shown in FIG. 7 with the inner connecting member and the outer connecting member mounted.

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

In FIGS. 1 to 3, an engine mount 10 for an automobile is shown as a first embodiment of a vibration isolator having a structure according to the present invention. The engine mount 10 has a structure in which the first mounting member 12 and the second mounting member 14 are elastically connected by a main body rubber elastic body 16. In the following description, as a general rule, the vertical direction refers to the vertical direction in FIG. 1, the horizontal direction refers to the horizontal direction in FIG. 1, and the front-rear direction refers to the horizontal direction in FIG.

More specifically, the first mounting member 12 is a high-rigidity member formed of a metal such as iron or aluminum alloy, a synthetic resin reinforced with fibers, or the like, and has a substantially shallow dish shape. .. Further, in the radial center portion of the first mounting member 12, the first bolt hole 18 as a bolt insertion hole is formed so as to penetrate in the vertical direction which is the thickness direction.

The second mounting member 14 has a tubular portion 20 extending linearly in the vertical direction, and a pair of mounting pieces 22 and 22 extending outward to the left and right are integrally formed at the upper end of the tubular portion 20. A second bolt hole 24 penetrating vertically is formed in each of the pair of mounting pieces 22 and 22. In the present embodiment, a step is provided in the left and right intermediate portion of the mounting piece 22, and the end portion where the second bolt hole 24 is formed located on the left and right outside of the step is located on the left and right inside of the step. It is located below the base of the mounting piece 22 connected to the tubular portion 20.

Then, the first mounting member 12 is arranged above the second mounting member 14, and the first mounting member 12 and the second mounting member 14 are elastically connected by the main body rubber elastic body 16. The main body rubber elastic body 16 has a tubular shape having an inner hole 26 penetrating in the axial direction (vertical direction), and the upper surface, which is the end face in the axial direction, is the first bolt hole on the lower surface of the first mounting member 12. The outer peripheral surface of the second mounting member 14 is vulcanized and bonded to the inner peripheral surface of the tubular portion 20 of the second mounting member 14. In the present embodiment, the main body rubber elastic body 16 is formed as an integrally vulcanized molded product including the first mounting member 12 and the second mounting member 14. Further, the main body rubber elastic body 16 of the present embodiment has a substantially long cylindrical shape having semi-arc plate-shaped portions on both sides of a pair of flat plate portions facing each other. For example, an ellipse having no flat plate portions. It may be tubular or cylindrical.

Further, the inner peripheral surface of the main body rubber elastic body 16 which is the inner surface of the peripheral wall of the inner hole 26 expands in the left-right direction as it goes downward in the axial direction, and is smoothly continuous up and down. In particular, on the inner peripheral surface of the portion of the second mounting member 14 fixed to the tubular portion 20, inclined surfaces 28 having an increased inclination angle with respect to the axial direction are provided on both the left and right sides, and the inclined surfaces 28 are provided. The lower side has a larger internal dimension in the left-right direction than the upper side. Further, on the inner peripheral surface of the main body rubber elastic body 16, an annular lip 30 protruding into the inner hole 26 above the inclined surfaces 28 and 28 is continuously formed over the entire circumference.

Further, the first bolt hole 18 of the first mounting member 12 is arranged on substantially the same central axis as the inner hole 26 of the main body rubber elastic body 16 and is opened toward the inner hole 26 as well as inside. The internal dimension in the direction perpendicular to the axis is smaller than that of the hole 26. As a result, the opening peripheral edge of the first bolt hole 18 in the first mounting member 12 is moved to the inner peripheral side of the inner peripheral surface of the upper end portion of the main body rubber elastic body 16 fixed to the first mounting member 12. It protrudes and is exposed from the main body rubber elastic body 16.

Further, as shown in FIG. 3, four contact convex portions 32, 32, 32, 32 project from the inner surface of the peripheral wall of the inner hole 26 of the main body rubber elastic body 16. The abutting convex portion 32 is integrally formed so as to project toward the inner peripheral side at the axial upper end portion of the main body rubber elastic body 16 to which the first mounting member 12 is fixed. Four protruding from the inner peripheral surface of the body 16 in the front-rear and inward and inwardly on the left and right are arranged side by side in the circumferential direction. Further, the contact convex portion 32 is provided above the inclined surface 28, and is arranged at a position deviated upward in the axial direction with respect to the tubular portion 20 of the second mounting member 14. Furthermore, the contact convex portion 32 has a guide surface 34 whose lower surface is inclined in the direction perpendicular to the axis, and has a tapered shape that expands as the guide surface 34 goes downward, and the inner peripheral end surface 36. Spreads linearly in the vertical direction.

In addition, relief recesses 38 are formed between the circumferential directions of the abutting convex portions 32 and 32 arranged adjacent to each other. As shown in FIG. 3, the relief recess 38 is formed in a portion that is aligned with the contact convex portion 32 in the main body rubber elastic body 16 in the circumferential direction and is separated from the contact convex portion 32 in the circumferential direction. Since the portion 32 projects toward the inner circumference, it has a concave shape that opens relatively toward the inner circumference. In short, the four contact protrusions 32, 32, 32, 32 and the four relief recesses 38, 38, 38, 38 are provided alternately in the circumferential direction as shown in FIG. 3, and are adjacent to each other in the circumferential direction. The contact protrusions 32, 32 arranged at the positions are separated by the relief recesses 38 without being continuous in the circumferential direction.

Further, the relief recess 38 of the present embodiment has an inner surface curved in an arc shape in the circumferential direction, and the inner surface of the relief recess 38 is a smooth concave curved surface having no break points or break lines. Further, the circumferential end of the relief recess 38 and the circumferential end of the contact convex portion 32 may be continuous at an angle, but it is desirable that they are smoothly continuous in the circumferential direction.

In the engine mount 10 having such a structure, as shown in FIG. 4, the first mounting member 12 is fixed to the inner connecting member 40 as the connecting target member inserted into the main body rubber elastic body 16. , The second mounting member 14 is fixed to the outer connecting member 42 to be overlapped with the mounting pieces 22 and 22 by the connecting bolt 41 or the like inserted into the second bolt hole 24. The inner connecting member 40 is attached to, for example, a power unit (not shown), and the outer connecting member 42 is attached to, for example, a vehicle body (not shown), and the power unit is vibration-proof connected to the vehicle body via the engine mount 10. It has become so.

As shown in FIG. 4, the inner connecting member 40 is rod-shaped as a whole and is a high-rigidity member made of metal or the like, and the bolt portion 44 having a thread formed on the outer peripheral surface is inside. It has a structure integrally formed so as to project upward from the actual rod-shaped insertion base 46. The outer peripheral surface of the upper end portion of the bolt portion 44 is a tapered surface 48 that is inclined with respect to the axial direction, and the upper end portion of the bolt portion 44 is reduced in diameter by the tapered surface 48. ing. Further, a serration portion 50 in which a large number of concave grooves and ridges extending linearly in the vertical direction are alternately formed in the circumferential direction is integrally formed at the lower end portion of the bolt portion 44.

Further, the outer diameter dimension of the upper end portion of the insertion base portion 46 is larger than the outer diameter dimension of the lower end portion of the bolt portion 44, and the joint portion between the lower end portion of the bolt portion 44 and the upper end portion of the insertion base portion 46 is substantially. An annular contact surface 52 extending in the direction perpendicular to the axis is formed. The insertion base 46 has a portion to be inserted into the inner hole 26 of the rubber elastic body 16 of the main body, which will be described later, having a gradually or stepwise larger diameter toward the lower side. It has a structure in which an outer diameter changing portion 58 whose outer diameter gradually changes is integrally formed between the shaft portion 54 and the lower large diameter shaft portion 56.

The inner connecting member 40 is inserted into the rubber elastic body 16 of the main body from below, and the bolt portion 44 provided at the upper end is inserted into the first bolt hole 18 of the first mounting member 12, and the bolt is inserted. The insertion base 46 integrally formed below the portion 44 is inserted into the inner hole 26 of the main body rubber elastic body 16. The first bolt hole 18 has a larger diameter than the bolt portion 44 of the inner connecting member 40 and a smaller diameter than the annular contact surface 52. Further, the peripheral portion of the first bolt hole 18 on the lower surface of the first mounting member 12 is the same as or larger than the annular contact surface 52 of the inner connecting member 40 in the inner hole 26 of the main body rubber elastic body 16. It is exposed directly in the area. Then, by screwing the nut 60 into the bolt portion 44 inserted into the first bolt hole 18, the opening peripheral edge portion of the first bolt hole 18 in the first mounting member 12 becomes larger than the bolt portion 44. The first mounting member 12 is fixed to the inner connecting member 40 by being vertically sandwiched between the insertion base 46 of the inner connecting member 40 having a large diameter and the nut 60.

Here, when the inner connecting member 40 is inserted into the inner hole 26 of the main body rubber elastic body 16 from below, the bolt portion 44 can be inserted into the first bolt hole 18 of the first mounting member 12. You will be guided to the position. That is, as shown in FIG. 5, when the bolt portion 44 is inserted at a position deviated from the center in the direction perpendicular to the axis with respect to the inner hole 26 of the main body rubber elastic body 16, the tip portion of the bolt portion 44 becomes the main body rubber elastic body. It abuts on the inner surface of the peripheral wall of the inner hole 26 of the body 16. Since the inner surface of the peripheral wall of the inner hole 26 has a smaller diameter as it goes upward smoothly and continuously in the axial direction, the bolt portion 44 gradually comes into contact with the inner surface of the peripheral wall of the inner hole 26 in the direction perpendicular to the axis. You will be guided to the center. Then, the bolt portion 44 slides in contact with the contact convex portion 32 of the rubber elastic body 16 of the main body and is directly guided to the inner peripheral side, so that the upper end surface of the bolt portion 44 is projected in the axial direction of the first bolt hole 18. Positioned on top.

Since the lower surface of the contact convex portion 32 is a tapered guide surface 34 whose diameter gradually decreases upward in the axial direction, the inner connecting member 40 is inserted into the inner hole 26 of the main body rubber elastic body 16. Even if the tip portion of the bolt portion 44 comes into contact with the guide surface 34 of the contact convex portion 32, the bolt portion 44 is guided to the inner peripheral side without being caught on the lower surface of the contact convex portion 32.

In this way, when the inner connecting member 40 is inserted upward from the lower opening of the main body rubber elastic body 16, the bolt portion 44 of the inner connecting member 40 comes into contact with the contact convex portion 32, whereby the first bolt It is positioned within a predetermined range in the direction perpendicular to the axis with respect to the hole 18. As a result, the bolt portion 44 of the inner connecting member 40 is inserted into the first bolt hole 18 of the first mounting member 12 without being caught in the opening peripheral portion of the first bolt hole 18. The work of mounting the engine mount 10 on the vehicle becomes easy. Further, the bolt portion 44 is strongly pressed against the first mounting member 12 in the axial direction, the first mounting member 12 is deformed, the first mounting member 12 is peeled off from the main body rubber elastic body 16, and the like. Problems are also avoided.

In particular, in the present embodiment, the four contact convex portions 32, 32, 32, 32 are arranged on both sides of the inner surface of the peripheral wall of the main body rubber elastic body 16 in two directions orthogonal to each other (front-rear direction and left-right direction). The inner connecting member 40 comes into contact with the outer peripheral surface of the insertion base 46 from both sides in the front-rear direction and the left-right direction. As a result, when the inner connecting member 40 is inserted into the inner hole 26 of the main body rubber elastic body 16, the inner connecting member 40 can be positioned more stably by the contact convex portion 32, and the inner connecting member 40 can be positioned more stably. The bolt portion 44 can be more reliably guided to the first bolt hole 18 of the first mounting member 12.

Further, as shown in FIG. 6, the tapered surface 48 provided at the tip of the bolt portion 44 comes into contact with the lower opening peripheral edge of the first bolt hole 18 of the first mounting member 12, so that the bolt portion 44 Is further guided to the inner peripheral side by the guiding action of the tapered surface 48, and the bolt portion 44 is easily inserted into the first bolt hole 18 without being caught by the opening peripheral edge. In the present embodiment, the inner method of the inner peripheral end surface 36 of the contact convex portion 32, that is, the diameter of the virtual circumference where the inner peripheral end surface 36 of the contact convex portion 32 is located and the diameter of the first bolt hole 18. The difference between the bolt portion 44 and the tapered surface 48 of the bolt portion 44 is smaller than the difference between the maximum outer diameter and the minimum outer diameter. As a result, the outer peripheral surface of the bolt portion 44 is in sliding contact with the inner peripheral end surface 36 of the contact convex portion 32, in other words, the first bolt hole within the range in which the bolt portion 44 is positioned by the contact convex portion 32. Even when the bolt portion 44 is inserted at the most displaced position with respect to 18, the tapered surface 48 of the bolt portion 44 comes into contact with the lower opening peripheral edge of the first bolt hole 18.

Further, in the present embodiment, since the contact convex portion 32 is formed at the upper end portion of the main body rubber elastic body 16, the lower opening on the insertion side of the inner connecting member 40 is narrowed by the contact convex portion 32. A large opening area is secured without being damaged. As a result, the inner connecting member 40 can be easily inserted into the inner hole 26 of the rubber elastic body 16 of the main body, and the bolt portion 44 of the inner connecting member 40 is closer to the first bolt hole 18 by the contact convex portion 32. It can be positioned accurately at the position.

In the bolt portion 44 inserted into the first bolt hole 18, the serration portion 50 provided at the protruding base end portion is fitted to the inner peripheral surface (fitting surface 62) of the first bolt hole 18. The bolt portion 44 is positioned with respect to the first mounting member 12 in a predetermined insertion state into the first bolt hole 18. Further, after the serration portion 50 is press-fitted into the first bolt hole 18, the portion of the serration portion 50 that protrudes upward from the first bolt hole 18 is crushed downward to expand the diameter of the bolt portion 44. It can also be positioned more firmly in the axial direction with respect to the first mounting member 12. By positioning the bolt portion 44 and the first mounting member 12 relative to each other in this way, loosening of the nut 60 due to the relative displacement of the bolt portion 44 and the first mounting member 12 in the axial direction is prevented. Therefore, reliability and durability can be improved.

When axial vibration is input while the engine mount 10 is mounted on the vehicle as described above, the rubber elastic body 16 of the main body is elastically deformed between the first mounting member 12 and the second mounting member 14. , The desired anti-vibration effect is exhibited. On the other hand, when vibration in the direction perpendicular to the axis is input while mounted on the vehicle, the insertion base 46 of the inner connecting member 40 and the second mounting member are overlapped on the inner surface of the peripheral wall of the inner hole 26 of the main body rubber elastic body 16. The rubber elastic body 16 of the main body is elastically deformed between the body and the rubber body 14, and the desired anti-vibration effect is exhibited.

Further, in the engine mount 10, the inner peripheral end surface 36 of the contact convex portion 32 protruding toward the inner circumference of the main body rubber elastic body 16 is inserted at the insertion base when the engine mount 10 is mounted on a vehicle in which the shared supporting load of the power unit acts in the vertical direction. The relief recesses 38 formed on both sides of each of the contact convex portions 32 in the circumferential direction while being pressed against the outer peripheral surface of the 46 are arranged apart from the outer peripheral surface of the insertion base portion 46 toward the outer peripheral side. As a result, each contact convex portion 32 is allowed to be deformed outward in the circumferential direction, and the radial compression spring characteristic of each contact convex portion 32 is set to be soft. Therefore, the contact convex portion 32 is formed. The influence of the above on the spring characteristics of the engine mount 10 is reduced, and the desired anti-vibration performance can be effectively obtained. In particular, when inputting small-amplitude vibration to the extent that the insertion base 46 does not come into contact with the main body rubber elastic body 16 in the region outside the contact convex portion 32, the soft spring characteristics set in the contact convex portion 32 are excellent. Anti-vibration performance can be realized.

In addition, when the inner connecting member 40 is mounted on the vehicle, the insertion base 46 of the inner connecting member 40 is in contact with the inner peripheral end surface 36 of the contact convex portion 32 in advance, so that the inner connecting member 40 is in contact with the inner peripheral end surface 36 in the direction perpendicular to the axis. Abnormal noise caused by hitting the inner peripheral end surface 36 of the contact convex portion 32 is also prevented.

Further, in the present embodiment, since the four contact convex portions 32, 32, 32, 32 are arranged on the front, rear, left and right sides of the vehicle, which is the main vibration input direction in the direction perpendicular to the axis, the front, rear, left and right vibration inputs can be obtained. On the other hand, each contact convex portion 32 is easily deformed so as to bulge to both sides in the circumferential direction, and the soft spring characteristic of the contact convex portion 32 is advantageously realized. Moreover, since the four contact convex portions 32, 32, 32, 32 are provided side by side in the circumferential direction, the circumferential length of each contact convex portion 32 does not become too long, and each contact does not occur. It is easy to set a soft spring characteristic on the convex portion 32.

In addition, in the engine mount 10 according to the present embodiment provided with the abutting convex portion 32 and the relief recess 38, the vibration isolation is substantially the same as that of the engine mount having the conventional structure having no abutting convex portion 32 and the relief recess 38. It was confirmed by experiments that the characteristics were exhibited. Further, when an engine mount having a structure in which a contact convex portion is provided in an annular shape is prototyped and compared with the engine mount 10 according to the present embodiment, the height is about 10% with respect to the spring of the engine mount 10 according to the present embodiment. It was confirmed that it was made into a dynamic spring. Therefore, the engine mount 10 according to the present embodiment can be mounted on the vehicle while effectively reducing the influence on the anti-vibration characteristics due to the provision of the contact convex portion 32 and realizing the desired anti-vibration performance. It has been confirmed from the experimental results that it can be easily and surely performed.

Furthermore, the abutting convex portion 32 is formed at the upper end portion of the main body rubber elastic body 16, and the abutting convex portion 32 is axially above the portion of the main body rubber elastic body 16 fixed to the second mounting member 14. Is located in. As a result, the influence of the contact convex portion 32 on the spring characteristics in the direction perpendicular to the axis of the engine mount 10 is further reduced, and excellent vibration isolation performance can be realized.

Further, since the inner peripheral surface of the relief recess 38 is a smooth arcuate curved surface having no broken points or broken lines, stress is dispersed when the inner peripheral surface of the relief recess 38 is deformed. , Durability is improved.

Further, when a large-amplitude vibration is input in the direction perpendicular to the axis, the insertion base portion 46 abuts on the main body rubber elastic body 16 in a region outside the abutting convex portion 32, so that a non-linear spring characteristic can be obtained. This makes it possible to obtain the desired vibration isolation performance while limiting the relative displacement between the power unit and the vehicle body.

FIG. 7 shows an engine mount 70 as a second embodiment of the present invention. As shown in FIGS. 8 to 11, the engine mount 70 is formed so that the four contact convex portions 72a, 72a, 72b, 72b project toward the inner peripheral side at the lower end portion of the main body rubber elastic body 16. A groove-shaped relief recess 74 extending vertically is formed between the contact convex portion 72a and the contact convex portion 72b in the circumferential direction. 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.

More specifically, in the main body rubber elastic body 16 of the present embodiment, as shown in FIG. 8, a pair of contact convex portions 72a, 72a formed at positions facing each other in the front-rear direction and positions facing each other in the left-right direction. It is provided with a pair of contact convex portions 72b and 72b formed in the above, and the contact convex portion 72a has a larger circumferential length dimension than the contact convex portion 72b. The four relief recesses 74, 74, 74, 74 are arranged unevenly at positions far from the left and right centers and close to the front and rear centers due to the difference in the circumferential lengths of the contact convex portions 72a and the contact convex portions 72b. (See FIG. 8).

As shown in FIGS. 9 and 10, the upper portion of the inner peripheral end surface 36 of the abutting convex portion 72 is slightly inclined downward to the outer periphery, and the lower end of the inner peripheral end surface 36 of the abutting convex portion 72. The portion has an expanded shape in which the diameter becomes larger as it goes downward at an inclination angle larger than that of the upper portion, so that the sleeve 78, which will be described later, can be easily inserted into the inner hole 26. Further, on the upper side of the abutting convex portion 72, an annular lip 30 projecting from the inner peripheral surface of the inner hole 26 is continuously formed over the entire circumference, and the inner method of the annular lip 30 in the direction perpendicular to the axis is formed. The dimensions are smaller than the outer diameter below the stepped portion 82 of the sleeve 78, which will be described later.

Further, as shown in FIG. 7, a sleeve 78 is inserted and arranged in the inner hole 26 of the main body rubber elastic body 16. The sleeve 78 is a hard member made of synthetic resin, metal, or the like, and has a substantially cylindrical shape as a whole, and has a tapered tubular shape in which the lower end portion gradually expands in diameter downward. There is. As a result, the guide hole 80, which is the inner hole of the sleeve 78, extends linearly up and down with a substantially constant circular cross section, and the lower end portion becomes larger in diameter as it goes downward. The upper opening of the guide hole 80 in the sleeve 78 has a diameter larger than that of the first bolt hole 18 of the first mounting member 12, and the inner diameter of the sleeve 78 is inserted into the first bolt hole 18. It is made larger than the outer diameter of the bolt portion 44.

Further, an annular stepped portion 82 is formed in the upper and lower intermediate portions of the sleeve 78, and the outer diameter dimension above the stepped portion 82 of the sleeve 78 is lower than the stepped portion 82 of the sleeve 78. It is smaller than the outer diameter. Further, the stepped portion 82 of the sleeve 78 is a surface that tilts upward toward the inner peripheral side, and the outer peripheral surface of the sleeve 78 above the stepped portion 82 gradually becomes smaller in diameter upward. It has a tapered tubular shape. As a result, the upper portion of the sleeve 78 with respect to the stepped portion 82 gradually becomes thinner in the radial direction toward the upper side.

The sleeve 78 is inserted into the inner hole 26 of the main body rubber elastic body 16 from below, and is elastically supported by the annular lip 30 projecting from the inner peripheral surface of the main body rubber elastic body 16. It is attached to the elastic body 16 without adhesion. The sleeve 78 is held so as not to be unintentionally dropped due to the elasticity of the annular lip 30 in the mounted state inserted into the inner hole 26 of the main body rubber elastic body 16, and by applying an external force to the sleeve 78, the sleeve 78 is held. It is possible to pull out the sleeve 78 from the inner hole 26.

Further, as shown in FIG. 12, when the sleeve 78 is inserted into the inner hole 26 of the rubber elastic body 16 of the main body, if the central axis of the sleeve 78 and the central axis of the inner hole 26 are deviated from each other, the sleeve 78 The sleeve 78 is positioned on substantially the same central axis with respect to the inner hole 26 by guiding the upper end portion by sliding contact with the contact convex portion 72 projecting from the inner peripheral surface of the main body rubber elastic body 16. .. That is, since the inner surface of the peripheral wall of the inner hole 26 of the main body rubber elastic body 16 has a smooth shape continuous in the axial direction, the upper end portion of the sleeve 78 is guided by sliding contact with the inner surface of the peripheral wall of the inner hole 26. , The sleeve 78 is guided to the inner peripheral side in the inner hole 26 of the main body rubber elastic body 16. Further, the upper end portion of the sleeve 78 is in contact with the contact convex portion 72, and the sleeve 78 is inserted and arranged in the inner hole 26 of the main body rubber elastic body 16 while being guided along the surface of the contact convex portion 72. , The guide hole 80 of the sleeve 78 is positioned in the direction perpendicular to the axis and communicates in the axial direction with respect to the first bolt hole 18 of the first mounting member 12.

Further, as shown in FIG. 7, the upper end surface of the sleeve 78 abuts from below on the inner peripheral end portion of the first mounting member 12 projecting from the main body rubber elastic body 16 to the inner circumference, so that the sleeve 78 becomes a second. It is positioned relative to one mounting member 12 in the axial direction. As described above, the sleeve 78 is inserted into the inner hole 26 of the main body rubber elastic body 16 from below, so that the guide hole 80 of the sleeve 78 is perpendicular to the first bolt hole 18 of the first mounting member 12. It is designed to be positioned in the directional and axial directions. Since the sleeve 78 has a diameter larger than that of the first bolt hole 18 of the first mounting member 12, it does not enter the first bolt hole 18 and hits the first mounting member 12. By being inserted to a contacting position, it is arranged at an appropriate position in the axial direction in the inner hole 26 of the main body rubber elastic body 16.

In the engine mount 70 according to the present embodiment provided with such a sleeve 78, as shown in FIG. 13, the inner hole 80 is inserted into the inner hole 26 of the rubber elastic body 16 of the main body and is inserted into the guide hole 80 of the sleeve 78. The connecting member 84 is inserted from below. The inner connecting member 84 has a rod shape that extends linearly in the vertical direction as a whole, and has an insertion base 86 that is inserted into the guide hole 80 of the sleeve 78 and a first mounting member 12 that protrudes upward from the insertion base 86. A bolt portion 44 to be inserted into the first bolt hole 18 of the above is integrally provided. Further, below the insertion base 86, a collar 88 having a diameter larger than that of the lower opening of the guide hole 80 of the sleeve 78 is integrally formed. The insertion base portion 86 of the present embodiment has a substantially cylindrical shape having a diameter larger than that of the bolt portion 44, the outer peripheral surface extends vertically with a substantially constant circular cross section, and the outer diameter dimension of the sleeve 78. It is slightly smaller than the inner diameter.

Then, when the inner connecting member 84 is inserted into the guide hole 80 of the sleeve 78, the inner connecting member 84 is in sliding contact with the inner peripheral surface of the sleeve 78, so that the bolt portion 44 is the first of the first mounting members 12. It is positioned in the direction perpendicular to the axis with respect to the bolt hole 18 of the above. As a result, the bolt portion 44 can be inserted into the first bolt hole 18, and the nut 60 is screwed into the bolt portion 44 to fix the inner connecting member 84 to the first mounting member 12. It has become like.

In the engine mount 70 having a structure according to the present embodiment, when the sleeve 78 is inserted into the inner hole 26 of the main body rubber elastic body 16, the sleeve 78 abuts the convex portions 72a, 72a, 72b of the main body rubber elastic body 16. By sliding contact with at least one of 72 and 72b, the sleeve 78 is positioned at an appropriate position in the direction perpendicular to the axis with respect to the inner hole 26 of the main body rubber elastic body 16. As a result, by inserting the inner connecting member 84 into the guide hole 80 of the sleeve 78, the bolt portion 44 of the inner connecting member 84 passes through the sleeve 78 with respect to the first bolt hole 18 of the first mounting member 12. Indirectly guided, the bolt portion 44 can be easily inserted into the first bolt hole 18.

Further, the contact convex portion 72 is provided near the lower end portion of the main body rubber elastic body 16, and when the sleeve 78 is inserted into the inner hole 26 of the main body rubber elastic body 16, the sleeve 78 is inserted from the initial stage of insertion. It is positioned by the contact convex portion 72. Therefore, it becomes easy to prevent the sleeve 78 from coming into contact with the inner peripheral surface of the main body rubber elastic body 16 at a position separated from the contact convex portion 72, and the durability of the main body rubber elastic body 16 can be improved. ..

Further, in the engine mount 70, the outer peripheral surface of the sleeve 78 and the inner peripheral end surface 36 of the contact convex portion 72 of the main body rubber elastic body 16 vibrate when the power unit is mounted on a vehicle in which the shared supporting load acts in the vertical direction. Even when no input is made, the contact is made in advance. As a result, it is possible to prevent the sleeve 78 and the contact convex portion 72 from hitting each other from a state of being separated from each other at the time of vibration input to generate a hitting sound or the like. Moreover, since the relief recesses 74 formed on both sides of the contact convex portion 72 in the circumferential direction are separated from the outer peripheral surface of the sleeve 78 toward the outer peripheral side in the stationary state of mounting on a vehicle to which vibration is not input. Elastic deformation that bulges outward in the circumferential direction of the contact convex portion 72 at the time of vibration input is allowed by the relief concave portion 74, and a soft spring characteristic is realized.

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, the specific number of the abutting convex portions 32, the arrangement in the circumferential direction, the shape, and the like should not be construed as being limited by the description of the above embodiment, and may be changed as appropriate. Further, the specific number of the relief recesses 38, the arrangement in the circumferential direction, the shape, and the like are not particularly limited and may be changed as appropriate.

Further, the contact convex portion 32 and the relief recess 38 are preferably formed at or near the axial end portion of the inner hole 26 of the main body rubber elastic body 16, but are formed at an intermediate portion such as the axial center. It may have been done. Further, the main body rubber elastic body 16 having the contact convex portion 32 at the upper end portion shown in the first embodiment, and the sleeve 78 and the inner connecting member 84 shown in the second embodiment can be adopted in combination. .. Further, the main body rubber elastic body 16 having the contact convex portion 72 at the lower end portion shown in the second embodiment and the inner connecting member 40 shown in the first embodiment may be adopted in combination.

Further, for example, the tapered surface 48 set at the upper end portion of the bolt portion 44 is omitted or made smaller, and is located above the lower surface of the opening peripheral edge portion of the first bolt hole 18 in the first mounting member 12. A tapered surface that contracts toward the surface is set, and the bolt portion 44 may come into contact with the tapered surface of the first mounting member 12 so that the bolt portion 44 is guided to the first bolt hole 18. ..

10,70: Engine mount, 12: First mounting member, 14: Second mounting member, 16: Main body rubber elastic body, 18: First bolt hole (bolt insertion hole), 20: Cylindrical part, 26 : Inner hole, 32, 72: Contact convex part, 34: Guide surface, 38, 74: Relief concave part, 40, 84: Inner connecting member (connecting target member), 44: Bolt part, 46, 86: Insertion base, 48: Tapered surface, 62: Fitting surface, 78: Sleeve

Claims (12)

The first mounting member is fixed to the axial end surface of the tubular main body rubber elastic body provided with the inner hole, and the second mounting member is fixed to the outer peripheral surface of the main body rubber elastic body. Has a structure in which the mounting member and the second mounting member are elastically connected by the main body rubber elastic body, and the first mounting member penetrates in the axial direction, and the inside of the main body rubber elastic body. A state in which a bolt insertion hole that opens with a size smaller than the inner hole is formed with respect to the hole, and a bolt portion provided in a member to be connected to be inserted into the inner hole is inserted into the bolt insertion hole. In a vibration isolator in which the first mounting member is directly tightened and fixed to the bolt portion with a nut without passing through the main body rubber elastic body to the connecting target member.
The inner surface of the peripheral wall of the inner hole of the main body rubber elastic body projects toward the inner peripheral side at a height that does not reach the bolt insertion hole, and guides the bolt portion to be inserted into the bolt insertion hole from the inner hole. with abutment protrusions is provided with a plurality of circumferentially for, which is among the plurality of circumferential direction of the protrusions is expanded recessed toward the outer periphery than the formation portion of the relevant protrusion tangent the A vibration isolator characterized in that a relief recess forming a gap between the member to be connected is provided. It is configured to include the connecting target member provided with the bolt portion, and has a radial dimension between the diameter of the virtual circumference where the inner peripheral end surface of the contact convex portion is located and the diameter of the bolt insertion hole. difference, characterized in that it is smaller than the radial dimensional difference between the maximum and minimum diameters of the tapered surface whose diameter decreases toward the tip is set to the tip portion of the bolt portion, and said consolidation member The anti-vibration device according to claim 1, which is combined. Four contact convex portions are formed so as to protrude on the inner surface of the peripheral wall of the inner hole of the main body rubber elastic body, and the relief recesses are provided between the circumferential directions of the four contact convex portions. The anti-vibration device according to claim 1 or 2, wherein these four contact convex portions are arranged on both sides of the inner surface of the inner hole of the rubber elastic body of the main body in two directions perpendicular to the axis substantially orthogonal to each other. .. Any one of claims 1 to 3, wherein the axial end surface of the contact convex portion on the opposite side of the first mounting member is a tapered guide surface that gradually expands outward in the axial direction. The anti-vibration device described in the section. The anti-vibration device according to any one of claims 1 to 4, wherein the contact convex portion is arranged at an end portion of the inner hole of the main body rubber elastic body on the side of the first mounting member. The anti-vibration device according to any one of claims 1 to 4, wherein the contact convex portion is provided in the vicinity of an end portion of the inner hole of the main body rubber elastic body on the side opposite to the first mounting member. .. The anti-vibration device according to any one of claims 1 to 6, wherein the inner peripheral surface of the relief recess is a curved surface that is continuously curved over the entire circumferential direction. The connection target member is configured to include the connection target member provided with the bolt portion, and the connection target member includes an insertion base portion to be inserted into the inner hole of the rubber elastic body of the main body, and the insertion base portion is the insertion base portion. The anti-vibration device according to any one of claims 1 to 7, which is combined with the member to be connected, which has a diameter larger than that of the bolt portion. The contact convex portion of the main body rubber elastic body directly guides the bolt portion of the connection target member, and the first mounting member is fixed to the connection target member to the vehicle. In the mounted state, the outer peripheral surface of the insertion base of the connecting target member arranged in the inner hole of the main body rubber elastic body abuts on the inner peripheral end faces of the plurality of abutting convex portions, and the plurality of abutting surfaces thereof. The anti-vibration device according to claim 8, wherein the relief recess provided between the circumferential directions of the convex portion is arranged away from the outer peripheral surface of the insertion base portion. Together with the bolt portion is configured to include the consolidated member provided, said body into said hole of the rubber elastic body, the bolt portion and the sleeve of larger diameter abutment than of the consolidated member It is guided and inserted by the convex portion and is positioned in the direction perpendicular to the axis, and the connecting target member includes an insertion base portion to be inserted into the sleeve disposed in the inner hole of the rubber elastic body of the main body. The bolt portion inserted into the bolt insertion hole is positioned by the corresponding tangent-convex portion of the rubber elastic body of the main body and is indirectly guided by the tangent-convex portion via the sleeve. The anti-vibration device according to any one of claims 1 to 8, which is combined with the member to be connected. In a state of being mounted on the vehicle in which the first mounting member is fixed to the connecting target member, the outer peripheral surface of the sleeve arranged in the inner hole of the main body rubber elastic body is formed by the plurality of contact convex portions. The anti-vibration device according to claim 10, wherein the relief recesses provided between the plurality of contact convex portions in the circumferential direction are arranged apart from the outer peripheral surface of the sleeve while abutting on the inner peripheral end surface. Together is configured to include the consolidated member to which the bolt portion is provided, the fitting surface of the inner peripheral surface of the bolt insertion hole is fitted to the base end portion of the bolt portion of the consolidated member The anti-vibration device according to any one of claims 1 to 11, which is combined with the member to be connected.

Images