JP5582961B2 - Bush type anti-vibration rubber mounting method, anti-vibration bush, and torque rod using anti-vibration bush - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a cylindrical bush type vibration proof rubber, a vibration proof bush formed by this method, and a torque rod using the vibration proof bush. It proposes a technology that can greatly reduce the number of rubber assembly steps or assembly steps.

  As conventional methods for attaching this type of bush type vibration-proof rubber, for example, there are those disclosed in Patent Documents 1 and 2, etc., and these methods are provided with a rigid inner cylinder in advance, The bush type anti-vibration rubber in which the cylinder is inserted and disposed afterward is reduced in diameter, and the anti-vibration rubber is inserted into the rigid outer cylinder in a reduced diameter state.

JP 2000-193004 A JP 2007-308016 A

  However, in these prior arts, in the installation of the bush type vibration isolating rubber, the diameter reducing deformation process of the vibration isolating rubber and the process of inserting the diameter reducing deformed vibration isolating rubber into the rigid outer cylinder Therefore, the number of work steps or work man-hours can not be denied, and in addition, bush type vibration-proof rubber is intended to reduce the number of parts, for example, at the assembly site of automobile bodies, etc. It was virtually impossible to attach directly to a predetermined rigid outer cylinder.

  The present invention has an object to solve such problems of the prior art, and the object of the invention is to reduce the diameter of the bush type vibration-proof rubber and to reduce the diameter of the rubber. Bush-type anti-vibration rubber that eliminates the need to insert anti-vibration rubber into a rigid outer cylinder, eliminates the risk of increase in work man-hours, etc. It is in providing the attachment method, the anti-vibration bush comprised by the method, and the torque rod which applied this anti-vibration bush.

In the present invention, a bush type vibration-proof rubber having a central through-hole is often subject to vibration-proofing by tightening a bolt inserted into the central through-hole, etc. Therefore, the bush type vibration isolator mounting method of the present invention is separated from the central through hole of the bush type anti vibration rubber having a central through hole. A pair of push-in members are disposed, and the tapered or spherical surfaces of the push-in members facing each other are pushed into the central through hole by tightening bolts, etc. Along with the compression deformation in the axial direction of the vibration isolator, the anti-vibration rubber is expanded and deformed, whereby at least a plurality of locations in the circumferential direction of the outer peripheral surface of the bush type anti-vibration rubber are provided. Rigidity encircling bracket is disposed around, for example, the inner peripheral surface of the rigid outer tube, wherein in close contact in a compressed deformed state of the central axis side of the central opening, across the central axis of the surrounding bracket, the surrounding bracket Projecting toward the inner peripheral surface side of the bushing type anti-vibration rubber, disposing a retaining part engaging with one end surface of the bushing type anti-vibration rubber, the bushing type anti-vibration rubber having a diameter smaller than the inner diameter of the retaining part, the outermost diameter of the bush-type vibration isolating rubber is to be greater than the inner diameter of the retaining portion, in Ru is the diameter variations.

  In this case, the pushing displacement of both pushing members is, for example, a bolt inserted through the central through hole or arranged outside the bush type vibration-proof rubber and extending in the central axial direction of the central through hole. It is preferable to perform the tightening of the anti-vibration rubber in order to cause the anti-vibration rubber to exhibit a necessary anti-vibration function, and to simultaneously perform the final installation process of the anti-vibration rubber and the pushing displacement process of the pushing member.

  In addition, each of the pair of push-in members is pushed into the central through-hole by the mutual contact between the opposed push-in members or the inner cylinder arranged in advance in the central through-hole and each push-in. It is preferable to specify by contact with the member in order to easily set the diameter expansion deformation amount of the vibration-proof rubber to a predetermined value.

Further, the vibration-isolating bushing of the present invention comprises one or more bush-type anti-vibration rubbers having a central through-hole, and a pair of pushing members arranged with the central through-hole spaced apart from each other with tapered surfaces or spherical surfaces facing each other. In the surrounding bracket made of a rigid member, the outer peripheral surface of the bushing anti-vibration rubber is provided with a plurality of circumferential positions around the anti-vibration rubber. the peripheral surface, said central through hole Ri Na is brought into close contact in a compressed deformed state of the central axis side of encircling bracket to both ends of the central axis line direction, of the bush type vibration isolating rubber protruding to the inner peripheral surface of the surrounding bracket It is provided with a retaining portion that engages with the end face .

  By the way, the bush type anti-vibration rubber can arrange two or three or more on the same axis with respect to one go bracket. In the latter case, three or more anti-vibration rubbers are arranged. One or two taper-shaped members or spherical surface members that enter the central through-holes of the bush-type anti-vibration rubber are arranged between the adjacent bush-type anti-vibration rubbers. Guarantees the required diameter expansion deformation of rubber.

  Here, the pushing amount of the pair of pushing members is set so as to penetrate both the pushing members and the bush type vibration-proof rubber, or to penetrate one pushing member while screwing to the other pushing member with the tip screw portion. It is advantageous to specify the bolt by the tightening amount of the bolt so that the bolt can be used for a predetermined assembly of the vibration-proof bushing.

  Furthermore, the torque rod according to the present invention is connected to the vibration generation side member and the vibration transmission side member via respective elastic members, and at least one elastic member is connected to any one of the above-described elastic members. It is a vibration-proof bush.

  In the method of mounting the bush type vibration-proof rubber of the present invention, the bush-type vibration-proof rubber having the central through hole is compressed and deformed in the axial direction by a pair of pushing members that enter the central through hole. By expanding and deforming under compressibility, as a result, the outer peripheral surface of the anti-vibration rubber is brought into close contact with the inner peripheral surface of the surrounding bracket disposed around it at least at a plurality of locations in the circumferential direction. The vibration isolating rubber can be easily attached to the rigid surrounding bracket at the site construction, for example, the step of reducing the diameter of the bush type anti-vibration rubber in which a rigid inner cylinder is inserted into the central through hole, and the diameter reducing By attaching the anti-vibration rubber in the state to the outer bracket without the need to insert it into the rigid outer cylinder, the number of work steps and man-hours can be reduced effectively. TMG, a bush type anti-vibration rubber in a compressed deformed state of the central axis side of its central opening, can be held sufficiently firmly.

  By the way, in this method, for example, the indentation displacement of both pushing members is passed through both the pushing members and the central through hole of the anti-vibration rubber, and the bolts extended in the central axis direction of the central through hole are tightened. Can be performed simultaneously with the indentation displacement of the indentation member and the attachment of the anti-vibration rubber to the vibration generation side or vibration transmission side member with a bolt, thereby further reducing the work man-hours and the like. it can.

  In addition, the inner cylinder in which the pushing amount of each of the pair of pushing members into the central through hole is arranged in advance by mutual contact of the opposed pushing members or at a predetermined position in the central through hole. When the contact with each pushing member is specified, the deformation of the anti-vibration rubber, and thus the elastic characteristic provided by the anti-vibration rubber, is always constant, and the performance of the anti-vibration bush is always determined. It can be homogeneous.

In the vibration isolating bushing of the present invention, the anti-vibration rubber is expanded and deformed by pushing the tapered surface or spherical surface of the pair of pushing members into the central through hole of the bush type anti-vibration rubber. By holding the rigid surrounding bracket, the same effect as described above with respect to the mounting method of the bush type vibration-proof rubber can be provided.
Here, the compression ratio in the central axial direction of the vibration isolating rubber for providing the required amount of expansion deformation of the bush type vibration isolating rubber is, for example, 3 to 50% with respect to the original axial length. In particular, 3 to 10% is preferable.
That is, if it is 3% or more, excellent pull-out resistance can be obtained, while if it is 50% or less, there is no possibility of deteriorating characteristics and durability. Among these, 10% or less is particularly preferable.
In other words, if it is less than 3%, it is difficult to ensure a sufficient pull-out resistance. On the other hand, if it exceeds 50%, the characteristics, durability, etc. cannot be greatly reduced.

  In such an anti-vibration bushing, at both ends in the central axis direction of the surrounding bracket, a retaining portion that protrudes toward the inner peripheral surface side of the surrounding bracket and engages with the end surface of the bush type anti-vibration rubber in an expanded posture is provided over the entire circumference. Alternatively, when a plurality of places spaced in the circumferential direction are provided, the vibration-proof rubber can be effectively prevented from unintentionally coming out in the axial direction of the surrounding bracket although there is no great input.

  Here, as for the bush type anti-vibration rubber, it is of course possible to arrange only one piece, but it is also possible to arrange two bush type anti-vibration rubbers on the same axis. Even in such a case, by pushing the pair of pushing members into the central through hole, each of the anti-vibration rubbers can be reliably expanded and deformed as expected.

On the other hand, when three or more bush type anti-vibration rubbers are arranged on the same axis line, each anti-vibration rubber is expanded and deformed as expected. It is preferable to arrange a taper member or a spherical member that enters into each central through hole between the vibration rubbers.
Here, the taper-shaped member or the like is a single one and can have a form that enters each central through hole of each adjacent anti-vibration rubber, and two adjacent back-to-back arrangements. It can also have a form which penetrates into each central through-hole of vibration-proof rubber.
Even in this case, for example, based on the predetermined pushing displacement of the pushing members paired up and down into the central through hole, each bush type vibration isolating rubber is combined with the action of the tapered member etc. Thus, the diameter can be expanded and deformed as expected.

  Further, the pushing amount of the pair of pushing members is penetrated through both pushing members and a nut is screwed into the tip portion, or one pushing member is passed through, while the other pushing member is screwed with the tip screw portion. When the bolt is specified by the tightening amount of the combined bolt, the bolt can also be applied to the vibration-proof bushing attached to at least one of the vibration generating side member and the vibration transmitting member. .

It is a longitudinal cross-sectional view which shows embodiment of the method and vibration isolating bush of this invention. It is a longitudinal cross-sectional view which shows other embodiment. It is a longitudinal cross-sectional view which shows other embodiment. It is a principal part disassembled perspective view which shows embodiment of a torque rod. It is a principal part disassembled perspective view which shows torque rod other embodiment. It is a perspective view which shows the connection side to the vehicle body side member of a torque rod.

  The bushing type vibration isolating rubber mounting method and the vibration isolating bushing shown in FIG. 1 show a case where two bush type vibration isolating rubbers 2 having a central through hole 1 are arranged on the same axis. Yes, as shown in the figure, each of the two anti-vibration rubbers 2 is fixed to, for example, a rigid inner cylinder 3 with a flange disposed in each central through hole 1 by vulcanization bonding, adhesive bonding or the like. It is positioned and held equal.

  Each of such two anti-vibration rubbers 2 is positioned inside the surrounding bracket 4 made of a rigid member so as to oppose each other of the pair of pushing members 5 arranged with the central through-holes 1 therebetween. Both tapered surfaces or spherical surfaces, in the figure, the tapered surfaces are pushed into the central through-hole 1 by tightening bolts 6 arranged to penetrate both the pushing members 5 and the rigid inner cylinder 3, for example. Both the anti-vibration rubbers 2 are compressed and deformed in the axial direction by equal amounts, and the diameter of the both anti-vibration rubbers 2 is expanded, so that at least a plurality of circumferential outer surfaces of the bush type anti-vibration rubbers 2, for example, the entire circumference are enclosed. The bracket 4 is brought into close contact with the inner peripheral surface of the central through hole 1 in a state of compressive deformation toward the central axis side.

  According to this, both the anti-vibration rubbers 2 are frictionally engaged with the surrounding bracket 4 with a predetermined force and effectively prevented from coming off, and the required elastic force is exerted under the action of the initial compression force. Therefore, the anti-vibration function as expected can be exhibited with respect to the input in the direction in which the inner cylinder 3 and the surrounding bracket 4 approach and separate.

  In the anti-vibration bush 7 in which the anti-vibration rubbers 2 are in close contact with the surrounding bracket 4 as shown in FIG. 1 (b), it preferably protrudes toward the inner peripheral surface at both ends in the central axis direction of the surrounding bracket 4. In addition, the anti-separation portion 8 that engages with one end face of each bush type anti-vibration rubber 2 is provided intermittently or over the entire circumference in the circumferential direction, and the anti-vibration is against the input of the anti-vibration rubber 2 in the axial direction. The rubber 2 is sufficiently prevented from unintentionally coming out.

  By the way, the amount of diameter expansion deformation accompanying the compression deformation as described above of both the anti-vibration rubbers 2 is, as shown in the figure, the bolt 6 penetrated through the inner cylinder 3 or the center penetration through the outer bracket 4. Needless to say, it can be controlled by adjusting the tightening amount of other bolts extending in the direction of the central axis of the hole 1. As shown in FIG. 1 (b), it is preferable that each of these is pushed and displaced into the central through hole 1 to a position where it abuts on each end face of the rigid inner cylinder 3 previously disposed in the central through hole 1. According to this, a constant quality anti-vibration bush can always be manufactured reliably.

  Here, instead of providing the rigid inner cylinder 3, in the drawing, at least one of the pair of pushing members 5 paired up and down is integrally provided with a cylindrical member protruding toward the facing pushing member 5 side. When the displacement of the vibration isolating rubber 2 into the central through hole 1 is displaced, one of the pushing members 5 is brought into contact with the cylindrical protrusion or between the two cylindrical protrusions. In the case where the indentation displacement amount is specified, the same effect as described above can be brought about.

  In the embodiment shown in FIG. 2, only one bush type vibration-proof rubber 2 is provided, and a rigidity having a predetermined axial length is provided at an intermediate portion in the extending direction of the central through hole 1 of the vibration-proof rubber 2. The inner cylinder 3 is fixed by, for example, vulcanization adhesion or the like, or is pressed and arranged under the action of a required frictional force.

This is because, for example, through the center portion of the push-in member 5, the taper surfaces facing each other of the pair of push-in members 5 arranged with the central through-hole 1 separated from each other inside the surrounding bracket 4 made of a rigid member, Under the action of a bolt or the like (not shown), the vibration-proof rubber 2 is expanded and deformed by being pushed into the central through hole 1, and the outer peripheral surface of the vibration-proof rubber 2 is surrounded by, for example, a plurality of circumferential brackets 4. The anti-vibration bush 9 as shown in FIG. 2B is configured by these.
In this vibration isolating bushing 9, the both ends in the axial direction of the surrounding bracket 4 are provided with retaining portions 8 that protrude toward the inner peripheral surface and engage with the respective end surfaces of the bush type vibration isolating rubber 2. The anti-vibration rubber 2 is prevented from unexpectedly coming out of the bracket 4.
And also in this figure, the pushing displacement amount of the pushing member 5 is regulated by the contact with the inner cylinder 3.

FIG. 3 shows a case where four bush type vibration-proof rubbers 2 are arranged on the same axis, and this is a displacement of the push-in member 5 forming a pair into the central through hole 1. At this time, in order to cause each of the vibration isolating rubbers 2 to be expanded and deformed sufficiently evenly, in addition to providing a tapered surface for each of the pair of pushing members, between the bush type vibration isolating rubbers 2 adjacent to each other, the bush One or two, for example, one in the figure, for example, an abacus bead-shaped taper member 10 is provided which enters the central through-hole 1 of the type anti-vibration rubber 2.
Here, each of the tapered members 10 may be two tapered members obtained by dividing each of the tapered members 10 in the vertical direction of the drawing. Each illustrated tapered member 10 may be one or two. It can also be a spherical member.
Incidentally, in each of the pair of pushing members 5 and the individual tapered members 10 that enter the central through hole 1 of the vibration isolator, the bush type anti-vibration rubber 2 is expanded in diameter by a predetermined amount as shown in FIG. Each of the cylindrical protrusions 5a and 10a is brought into contact with each other in a state of being in contact with each other.

  Each of the bush-type vibration isolating rubbers 2 here is also based on, for example, the central through hole 1 based on the tightening of a bolt or the like penetrating through the central portion of each of the pair of pushing member 5 and tapered member 10. Due to the inward displacement, the diameter can be expanded and deformed as required.

  In the embodiment described above, when each of the vibration isolating rubbers 2 is expanded and deformed on the basis of tightening of bolts or the like, the bolts or the like are disposed outside the bush type anti-vibration rubber 2 on the outside. Apart from extending in the central axial direction of the central through hole 1 of the rubber 2, when extending in the central axial direction in the central through hole 1, the bolt penetrated through one pushing member 5 It is possible to screw the male threaded portion at the tip of the inner threaded portion into the female threaded portion formed on the other push-in member 5, which eliminates the need for preparing a nut to be threadedly engaged with the male threaded portion of the bolt. The vibration rubber 2 can be expanded and deformed as expected.

  Incidentally, in the embodiment shown in FIG. 3 as well, in the anti-vibration bush in which the outer peripheral surface of each individual anti-vibration rubber 2 is brought into close contact with the inner peripheral surface of the surrounding bracket 4, It is preferable to provide a retaining portion 8 that engages with the end surface of the vibration rubber 2 partially or over the entire circumference.

  Such an anti-vibration bush is attached to the vibration generation side member or the vibration transmission side member with the bolt or the like when the bush type anti-vibration rubber 2 is tightened with a bolt or the like that causes diameter expansion deformation. Assembling on-site can be done easily with less work man-hours.

  4 and 5 show that the bush type vibration-proof rubber is attached to one end portion of the torque rod connected to each of the vibration generating side member and the vibration transmitting side member through the respective elastic members as described above. In many cases, the elastic member is an exploded perspective view of a main part, with the surrounding bracket to be fixed or fixed to one end of the torque rod omitted.

Here, the one shown in FIG. 4 penetrates the plate-like portion 22a at one end portion of the connecting member 22 of the torque rod 21 to fix or fix the rigid inner cylinder 3 having a predetermined length. The two bush-type anti-vibration rubbers 2 are fitted around the cylinder 3 with a central through hole 1 with or without an adhesive, and each central through hole is inserted. By encircling the tapered surfaces of the pair of push-in members 5 spaced apart from each other into the respective central through-holes 1, the respective vibration-proof rubbers 2 are sufficiently expanded in diameter to be deformed. 4 is configured so as to constitute one elastic member of the torque rod 21, and the torque rod 21 is provided with a torque lock by a bolt or the like that causes the displacement of the pair of pushing members 5. 21 in that the connecting members of the vibration generating side or vibration transmission side, the bolt or the like, can be used also with the mounting member of the vibration damping rubber 2, the connecting member of the torque rod 21.
It should be noted that the other elastic member can be obtained by assembling another anti-vibration bush or the like to the other end portion of the illustrated torque rod 21 by press-fitting or the like.

5, the connecting member 32 of the torque rod 31 is formed by a U-shaped molded product like a dust gripping tong that becomes a plastic processed product of a single metal plate. As shown in FIG. 2, the respective pushing members 5 that make a pair are fixed or fixed to each other at the free ends that are the end portions of the connecting member 32, and between the free ends of the connecting member 32. In addition, one bush type vibration isolating rubber 2 in which a rigid inner cylinder 3 is disposed in advance in the central through hole 1 of the vibration isolating rubber 2 is disposed concentrically with both pushing members 5 and then one free end. From the part side, the opposing taper surfaces of both pushing members 5 are pushed and displaced into the central through hole 1 by tightening bolts or the like penetrating the pushing members 5 and the vibration damping rubber 2. By bringing the outer peripheral surface into close contact with the inner peripheral surface of the go bracket 4, torque torque This torque rod 31 has a connecting member 32 formed of a U-shaped molded product, and a cylindrical molded portion provided at the other end portion. Therefore, for example, when the vibration isolating rubber 2 is attached to one end portion of the torque rod 31 as described above, when a necessary vibration isolating bush or the like is disposed in the cylindrical molded portion of the other end portion of the connecting member 32. The other elastic member such as the anti-vibration bush can be fastened and fixed in the cylindrical molded portion simultaneously with the attachment of the anti-vibration rubber 2 described above.
The torque rod 31 is also connected to a member on the vibration generation side or vibration transmission side by a bolt or the like that causes a displacement of the pair of pushing members 5, so that the bolt or the like is connected to the other elastic member. It can be used not only for fastening and fixing, but also for a mounting member for the vibration isolating rubber 2 and a connecting member for the torque rod 31.

FIG. 6 is a perspective view showing a connection side of a torque rod to a suspension member as an example of a vibration transmission side member.
For the suspension member 41 whose outer contour is shown in phantom lines in the figure, for example, on-site construction of the vehicle body assembly line, the attachment of the anti-vibration rubber 2 as illustrated in FIG. 4 and the connection of one end portion of the torque rod 21 are performed. When performing simultaneously, first, the rigid inner cylinder 3 provided on the connecting member 22 of the torque rod 21 is inserted into the opening 41 a formed in the suspension member 41 and the opening 4 a of the surrounding bracket 4 provided integrally with the suspension member 41. In a state of being sequentially inserted, each vibration isolating rubber 2 is fitted and arranged on the inner cylinder 3 from the upper and lower sides of the connecting member 22 in the figure, and then the central through hole 1 of each anti vibration isolating rubber 2 is separated. Thus, the pair of push-in members 5 are arranged with the tapered surfaces facing each other.
In this case, both the anti-vibration rubbers 2 before the diameter expansion deformation have a total length in the central axial direction longer than the axial length of the surrounding bracket 4, so that the dimension of the suspension member 41 in the thickness direction in the figure is In this relation, each of the anti-vibration rubbers 2 may be positioned so as to protrude from the top wall or the bottom wall of the suspension member 41 as shown in FIG.
On the other hand, when the thickness of the suspension member 41 is large and the top wall and the bottom wall are sufficiently separated from each other, the rigid inner cylinder is inserted prior to insertion of one end portion of the connecting member 22 into the respective openings 41a and 4a. It is also possible to fit each vibration isolating rubber 2 to 3 in advance. In this case, when each of the pushing members 5 making a pair can also be arranged in advance, the top wall and the bottom wall of the suspension member 41 It is sufficient to drill a small-diameter hole for inserting a bolt or the like described later.

After that, the bolts 42 are inserted through the washers 43 into the respective push-in members 5 and the central through holes 1 of the anti-vibration rubbers 2, and the bolts 42 are bolted through the washers (not shown). 42 is screwed into a nut (not shown) that is screwed into the male screw portion 42, and each vibration isolating rubber 2 is expanded and deformed sufficiently evenly based on the required pushing displacement of the pushing member 5. As shown in FIG. 6B, the outer peripheral surfaces of the two anti-vibration rubbers 2 are brought into close contact with the inner peripheral surface of the surrounding bracket 4 provided integrally with the suspension member 41, so that the connecting member 22 The attachment of the anti-vibration rubber 2 to one end portion and the connection of the one end portion of the torque rod 21 to the suspension member 41 can be performed simultaneously.
Although the present invention has been described based on the illustrated embodiment, the tapered surfaces facing each other of the pair of pushing members can be replaced with spherical surfaces.

DESCRIPTION OF SYMBOLS 1 Center through-hole 2 Bush type vibration-proof rubber 3 Rigid inner cylinder 4a, 41a Opening 4 Enclosure bracket 5 Push-in member 5a, 10a Cylindrical protrusion 6 Bolt 7, 9 Anti-vibration bush 8 Retaining part 10 Tapered member 21, 31 Torque rods 22, 32 Connecting member 22a Plate portion 41 Suspension member 42 Bolt 43 Washer

Claims (8)

A bush type anti-vibration rubber having a central through hole is provided with a pair of pushing members across the central through hole, and a tapered surface or a spherical surface of the two pushing members facing each other is disposed in the central through hole. The bush type anti-vibration rubber is expanded and deformed by being pushed into the hole, and at least a plurality of locations in the circumferential direction on the outer peripheral surface of the bush type anti-vibration rubber are arranged around the anti-vibration rubber. Adhere to the inner peripheral surface of the bracket,
At both ends of the central axis of the surrounding bracket, a retaining portion that protrudes toward the inner peripheral surface side of the surrounding bracket and engages with one end surface of the bush type anti-vibration rubber is disposed, and the inner diameter of the retaining portion is Installation of the bush type anti-vibration rubber, wherein the bush type anti-vibration rubber having a smaller diameter is deformed and expanded so that the outermost diameter of the bush type anti-vibration rubber is larger than the inner diameter of the retaining portion. Method.   The method of attaching a bush type vibration-proof rubber according to claim 1, wherein the pushing displacement of both pushing members is performed by tightening a bolt extending in the direction of the central axis of the central through hole.   The pushing amount of each of the pair of pushing members into the central through-hole is determined by mutual contact between the opposed pushing members, or an inner cylinder disposed in advance in the central through-hole, and each pushing member. The method for attaching the bush type vibration-proof rubber according to claim 1 or 2 specified by contact with the bushing. One or more bush type anti-vibration rubbers having a central through-hole are formed by a displacement of a pair of pushing members arranged with the central through-hole spaced apart from each other by taper surfaces or spherical surfaces facing each other into the central through-hole. The outer peripheral surface of the bush type anti-vibration rubber is deformed by expanding the diameter, and the peripheral portions of the bush type anti-vibration rubber are closely attached to the inner peripheral surface of the surrounding bracket made of a rigid member provided around the anti-vibration rubber.
An anti-vibration bushing provided with a retaining portion that protrudes toward the inner peripheral surface and engages with a bush-type anti-vibration rubber at both ends in the central axial direction of the surrounding bracket.   The anti-vibration bush according to claim 4, wherein two bush-type anti-vibration rubbers are disposed on the same axis.   Three or more bush-type anti-vibration rubbers are arranged on the same axis, and between each bush-type anti-vibration rubber, a tapered or spherical member that enters into each central through hole of the bush-type anti-vibration rubber The anti-vibration bush according to claim 4, wherein the anti-vibration bush is provided.   The push amount of the pair of push members is specified by the tightening amount of the bolt that is penetrated by both push members or is penetrated by one push member while being screwed to the other push member by the tip screw portion. The vibration-insulating bush according to any one of claims 4 to 6. Torque rods connected to the vibration generation side member and the vibration transmission side member via respective elastic members,
The torque rod which becomes at least one elastic member as a vibration proof bush in any one of Claims 4-7.