JPH10141437A - Cylindrical vibration-proof support body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical vibration-proof support body which can set large spring rigidity in the direction of right angle of a shaft, can realize a displacement amount limit mechanism (stopper mechanism) at the time of inputting load in the axial direction by a simple structure, and can be mounted between connected bodies easily. SOLUTION: A second mounting member 34 fixed on a second connected body 42 is inserted into a first mounting member 32 which is mounted on a first connected body 40 by inserting a cylindrical part 48 and overlapping a support plate part 46 internally, and a first end member 70 and a second end member 82 are fixed in both end parts of the second mounting member 34 in the axial direction. Furthermore, a first rubber elastic body 36 and a second rubber elastic body 38 are provided between the first mounting member 32 and the second mounting member 34 and are connected elastically. On the other hand, a scraped part 56 which is opened on an outer peripheral face and is extended in the peripheral direction is provided for a first compression rubber 52 in the axial direction which is provided between the support plate part 46 of the first mounting member 32 and the first end member 70 of the second mounting member 34, and both outer peripheral fringe parts of the support plate part 46 and the first end member 70 are positioned opposingly in the axial direction across a buffer rubber 62 to constitute a stopper mechanism in the axial direction of the first mounting member 32 and the second mounting member 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical vibration isolating support interposed between connected members to be vibration-isolated with each other, and in particular, to set a large spring stiffness ratio between an axial direction and a direction perpendicular to the axial direction. It has a stopper mechanism that is easy and can advantageously limit the relative displacement of the connected body when an excessive load is applied in the axial direction. For example, as a body mount, cab mount, subframe mount, etc. for automobiles The present invention relates to a cylindrical anti-vibration support that can be advantageously used.

[0002]

2. Description of the Related Art As a cylindrical anti-vibration support used as an automobile body mount or the like, a structure shown in FIG. 7 is conventionally known. Such a cylindrical anti-vibration support includes a pair of rubber blocks 6 having a thick cylindrical shape from both sides of the first connected member 4 provided with the mounting holes 2.
8 are overlapped and the inner cylinder fitting 10 is inserted into the center holes of the rubber blocks 6 and 8, and the inner cylinder fitting 10 is fixed to the second connected body 14 by bolts 12. Annular plate-shaped press contact plates 1 at both axial ends of 10
The rubber blocks 6 and 8 are axially pressed between the first connected member 4 and each of the press contact plates 16 and 16 in such a manner that the rubber blocks 6 and 16 are overlapped and fixed with the bolts 12.

However, in such a tubular vibration-proof support, the rubber blocks 6 and 8 effectively exert the spring rigidity and the vibration-proof effect against the input load in the axial direction, but the input force in the direction perpendicular to the axis. Since it is difficult for the load to be effectively applied to the rubber blocks 6 and 8 with respect to the load, it has been difficult to obtain sufficient spring rigidity and vibration-proof effect. For that, for example,
It has been very difficult to achieve the required characteristics in an engine mount for an automobile or the like, which requires a large spring stiffness even in the direction perpendicular to the axis in order to achieve both riding comfort and steering stability of the vehicle.

Therefore, as shown in FIG. 8, the outer peripheral surface of a cylindrical rubber block 18 in which an inner cylindrical metal fitting 10 to be bolted to the first connected member 2 is inserted is attached to the outer peripheral surface. A cylindrical anti-vibration support having a structure in which an outer cylindrical metal member 22 having an oriented flange portion 20 is vulcanized and bonded, and the flange portion 20 is overlapped with the second connected body 12 and fixed by bolts is also proposed. . In such a tubular anti-vibration support, the inner cylinder fitting 10 and the outer cylinder fitting 22 sandwich the rubber block 18,
Since the rubber block 18 is located at the radially opposed position, the input load in the direction perpendicular to the axis is effectively applied to the rubber block 18.

[0005] However, in such a tubular anti-vibration support, the mounting operation is troublesome because the flange portion 20 of the outer cylindrical fitting 22 must be bolted to the second connected body 14 at the time of mounting. There was a problem. Also,
Since the substantially opposed width in the radial direction of the inner cylindrical member 10 and the outer cylindrical member 22 that are radially opposed to each other with the rubber block 18 interposed therebetween is determined by the outer diameter of the inner cylindrical member 10, the small diameter When the inner cylinder 10 is employed, it is difficult to secure a sufficient radially opposed area between the inner cylinder 10 and the outer cylinder 22, and it is still difficult to obtain sufficient radial spring rigidity. There was also.

[0006]

Here, the inventions according to claims 1 to 7 have all been made on the background of the above-mentioned circumstances, and an object of the invention is to provide a spring rigidity in a direction perpendicular to an axis. It is an object of the present invention to provide a cylindrical anti-vibration support capable of setting a large value.

[0007] It is also an object of the present invention to provide a tubular anti-vibration support that can be easily mounted between connected objects.

Further, in any of the first to seventh aspects of the present invention, buckling or the like of the rubber elastic body when a large load is input in the axial direction is prevented, and the durability is improved. Is also a problem to be solved.

Further, the inventions described in any of the first to seventh aspects realize a stopper mechanism which can advantageously limit the relative displacement of the connected member when an excessive load is input in the axial direction. This is also a problem to be solved.

[0010]

In order to solve such a problem, a feature of the invention according to claim 1 is that the device is interposed between a first member to be connected and a second member to be connected. A cylindrical anti-vibration support for connecting both connected members in an anti-vibration manner, comprising: (a) a cylindrical cylindrical portion, and a circle extending outward from one axial end of the cylindrical portion in a direction perpendicular to the axis. Having a ring-shaped support plate portion,
An outer peripheral edge of the support plate is raised outward in the axial direction to form an annular stopper, and the cylindrical body is inserted into a mounting hole provided in the first connected body. In a state where the support plate portion is superimposed on the first connected body, a first mounting member mounted on the first connected body,
(B) having an outer diameter smaller by a predetermined dimension than the inner diameter of the cylindrical body of the first mounting member, inserted into the first mounting member, and protruding on both axial sides of the first mounting member. A second mounting member in the form of a rod, which is fixedly mounted to the second connected member, and (c) a direction perpendicular to the axis from one end of the second mounting member in the axial direction. An annular plate-shaped first pressure contact plate portion which is spread outward and is axially spaced and opposed to the support plate portion of the first mounting member; A cylindrical cover cylinder that projects in the axial direction from the peripheral portion toward the first mounting member side, and a protruding tip of the cover cylinder is positioned with respect to a stopper of the first mounting member. A first end member serving as an abutting portion facing the axial direction; and (d) the second mounting member is mounted on the other end of the second mounting member in the axial direction. A cylindrical outer insertion tube portion that extends inward in the axial direction so as to cover an end portion of the material, and is externally spaced apart from the tube portion of the first attachment member in a radially outward direction, It extends outward in the direction perpendicular to the axis from the opening end of the outer cylindrical portion, and is axially separated from and opposed to the surface of the first connected member opposite to the superposed surface of the support plate portion. A second end member having an annular plate-shaped second press-contact plate portion to be positioned; and (e) the second mounting member projecting radially from the cylindrical body portion of the first mounting member. The first radially compressed rubber pressed against the outer peripheral surface of the first mounting member, and protruded in the axial direction from the supporting plate portion of the first mounting member, and were pressed against the first pressing plate portion of the first end member. A first axial compression rubber, and a cushioning rubber provided on a surface of the first mounting member facing the contact portion of the stopper portion. And, a bulge portion which is formed on the outer peripheral surface of the first axially compressed rubber and continuously extends in the circumferential direction is formed, and the inner peripheral surface of the first axially compressed rubber faces in the protruding direction. (F) a first rubber elastic body adhered to the first mounting member, which gradually expands and is separated from the outer peripheral surface of the second mounting member;
Projecting radially from the outer tube portion of the second end member,
A second radial compression rubber pressed against an outer peripheral surface of the cylindrical body portion of the first mounting member, and an axially projecting protruding from the second pressing plate portion of the second mounting member; And a second rubber elastic body adhered to the second end member.

In the cylindrical vibration isolating support having the structure according to the first aspect of the present invention, the cylindrical portion of the first mounting member is inserted into the mounting hole of the first connected member. At the same time, based on the elasticity of the first axially-compressed rubber and the second axially-compressed rubber disposed on both sides of the first connected body, the support plate portion of the first mounting member is moved to the first position. The first attachment member is fixed to the first connected body by being pressed against the connected body. Thereby, the first mounting member is fixedly attached to the first connected body without requiring special fixing means such as bolts, so that the vibration-proof support can be easily attached to the connected body. It can be mounted.

The second mounting member is fixed to the second connected member by, for example, forming the second mounting member into a hollow rod shape and inserting the second mounting member into the second connected member by a bolt member inserted therein. The mounting member may be fixed to the second connected member, or the second mounting member may be formed as a solid rod, and the second mounting member may be bolted integrally at the axial end of the second mounting member. For example, the second attachment member may be fixed to the second connected body.

[0013] An axial input load or vibration input between the first mounting member and the second mounting member is applied to the first axial compression rubber and the second axial compression rubber. Thus, the support spring stiffness against the input load in the axial direction is exerted by these two axially compressed rubbers, and the anti-vibration effect against the axial input vibration is exhibited based on the elastic deformation of these two axially compressed rubbers. On the other hand, the radial input load is applied to the first radial compressed rubber and the second radial compressed rubber, and the first radial compressed rubber exerts spring stiffness against the radial input load. At the same time, an anti-vibration effect against radial input vibration is exhibited based on the elastic deformation of the first radial compression rubber.

Further, the spring stiffness in the axial direction, the vibration isolation characteristics, etc.
Tuning can be easily performed by appropriately changing the size, shape, and the like of the burrs provided on the first axial compression rubber.

Further, since the first radially compressed rubber and the second radially compressed rubber are compressed and deformed when a radial load is applied, a large spring rigidity is exhibited. In addition, the first radially compressed rubber and the second radially compressed rubber are provided between the cylindrical portion of the first mounting member and the respective radially opposed surfaces of the second mounting member and the second end member. Because of the interposition, the effective working area of the radial load on the first and second radially compressed rubbers is advantageously secured, and a large spring rigidity can be easily obtained.

The first compressed rubber in the axial direction has a substantially cylindrical shape which is continuous with a substantially constant cross-sectional shape in the circumferential direction, and further has an opening on the outer peripheral surface thereof to form a bulged portion. This effectively prevents buckling and local deformation such as bending inward and outward in the radial direction during compressive deformation in the axial direction, and exhibits stable elastic characteristics and vibration damping performance It is done. Furthermore, the first axially compressed rubber has an inner peripheral surface which is tapered toward the protruding direction and has a larger diameter, and is separated from the outer peripheral surface of the second mounting member. Even at the time of compression deformation, more stable elastic characteristics are exhibited by reducing or preventing pressure contact and buffering of the first axially compressed rubber to the second mounting member.

In addition, since the cover tubular portion of the first end member is disposed so as to cover the outer peripheral side of the protruding distal end portion of the first axially compressed rubber, when a large vibration load is input. In addition, irregular deformation such as buckling and bending of the first axially compressed rubber outward in the direction perpendicular to the axis is prevented by the contact with the cover cylinder, and the Thereby, the elastic vibration of the first axially compressed rubber and the vibration-proof performance of the cylindrical vibration-proof support can be stably exhibited, and the durability can be improved. In addition,
In order for the elasticity of the first axially compressed rubber to be advantageously exerted, a predetermined distance is provided between the outer peripheral surface of the first axially compressed rubber and the cover cylindrical portion under a mounted state of the cylindrical anti-vibration support. It is desirable that a gap be formed.

Furthermore, when an excessive load is input in the axial direction, the contact portion of the first end member is brought into contact with the stopper portion of the first mounting member via the cushion rubber. By doing so, the relative amount of axial displacement between the first mounting member and the second mounting member is limited, so that excessive relative displacement between the first connected member and the second connected member is prevented. At the same time, excessive deformation of the first axially compressed rubber is also prevented.

The invention described in claim 2 is the first invention.
In the cylindrical anti-vibration support having the structure according to the invention described in the above, the corners on both sides in the width direction at the bottom of the hollow portion provided on the first axial compression rubber, the first axial compression rubber In the free shape, each has an arcuate cross section, and the radius of curvature of the corner on the base side of the first axial compression rubber is set smaller than the radius of curvature of the corner on the tip side of the protruding end. That is the feature.

In the cylindrical vibration isolating support having the structure according to the second aspect of the present invention, when the first axially compressed rubber is subjected to an axial compression load, the first axially compressed rubber is subjected to the first axially compressed rubber. Since the bending point is easily generated at the base side corner of the bulge in the directional compression rubber, buckling bending deformation of only the tip of the first axial compression rubber can be effectively prevented, and the first The spring stiffness and elasticity of the axially compressed rubber can be exhibited more stably and more advantageously.

The invention described in claim 3 is the first invention.
Or in the cylindrical vibration-damping support having a structure according to the invention described in 2, wherein the first axial compression is performed in an interposed state between the first connected body and the second connected body. The opening size of the burring portion provided on the rubber is smaller than the distance between the abutting portion of the first end member and the surface facing the cushioning rubber provided on the stopper portion.

In the cylindrical vibration isolating support having the structure according to the third aspect of the present invention, when an axial load is applied, after the curving portion of the first axially compressed rubber is crushed. By exerting the stopper function by the contact between the contact portion and the stopper portion, a two-stage non-linear spring characteristic is exhibited, and the cushioning stopper function is extremely effectively exhibited.

The invention described in claim 4 is the first invention.
4. A cylindrical vibration isolating support having a structure according to the invention described in any one of (1) to (3), wherein the second rubber elastic body has an opening at an outer peripheral surface of the second axially-compressed rubber and is continuous in a circumferential direction. And an inner peripheral surface of the second axially-compressed rubber gradually expands in a protruding direction and is separated from an outer peripheral surface of the cylindrical body portion in the first mounting member. It is characterized by being hampered.

[0024] In the cylindrical vibration isolating support having the structure according to the fourth aspect of the present invention, the second axially-compressed rubber also has the same shape as that of the first axially-compressed rubber during compression deformation. The buckling deformation such as bending inward in the direction perpendicular to the axis is prevented, and the cushioning of the first mounting member to the cylindrical portion is reduced or damped, so that stable spring rigidity and elastic characteristics are exhibited. It is done. The configuration of the invention described in claim 4 is appropriately adopted in consideration of the input direction and the magnitude of the axial load in the cylindrical vibration isolating support, and particularly, the main component in the axial direction. It is advantageously applied when the load input direction is exerted from both axial sides.

The invention described in claim 5 is the first invention.
5. The cylindrical vibration-isolation support having the structure according to any one of the above-described aspects, wherein the first rubber member and the second rubber elastic member are mounted under the assembled state of the first mounting member and the second mounting member. The axial height of the second axially compressed rubber is not more than の of the axial height of the first axially compressed rubber in the first rubber elastic body, I do.

In the cylindrical vibration isolating support having the structure according to the fifth aspect of the present invention, the main load is applied in the direction in which the first axially compressed rubber is subjected to the axial compression deformation. It is preferably used in cases such as
Based on the elasticity of the first axial compression rubber, effective spring stiffness and anti-vibration performance can be effectively and stably exhibited.

The invention according to claim 6 is the first invention.
6. The cylindrical vibration-isolation support having a structure according to any one of claims 5 to 5, wherein the second rubber elastic body is mounted under an assembled state of the first mounting member and the second mounting member. Wherein the radial height of the second radially compressed rubber is １ ／ or less of the radial height of the first radially compressed rubber in the first rubber elastic body, I do.

In the cylindrical vibration isolating support having the structure according to the sixth aspect of the present invention, the spring rigidity in the direction perpendicular to the axis is advantageously based on the spring rigidity of the second radially compressed rubber. In addition to the elasticity of the first radial compression rubber, a relatively soft spring characteristic with respect to the input vibration in the twisting direction can exert a good vibration damping effect.

The invention described in claim 7 is the first invention.
7. In the cylindrical vibration isolating support having the structure according to any one of the above-described aspects, one of the first end member and the second end member is integrated with the second mounting member. While the other one of the first end member and the second end member is formed separately from the second mounting member, and is inserted through the first mounting member. The second mounting member is overlapped and fixed to an axial end of the second mounting member.

[0030] In the cylindrical anti-vibration support having the structure according to the seventh aspect of the present invention, for example, one of the first end member and the second end member is previously welded or the like. After the fixed or integrally formed second attachment member is inserted through the first attachment member, one of the first end member and the second end member is inserted through the second attachment member. It will be fixed with a bolt etc. to a tip part. Therefore, the first mounting member and the second mounting member can be easily and quickly assembled, and the second end member can be fixed to the second mounting member by the second mounting member. By using a bolt or the like for attaching to the connected body, the cylindrical vibration-isolating support can be mounted between the connected bodies simultaneously with the assembling.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIG. 1 shows an automobile body mount 30 according to an embodiment of the present invention. The body mount 30 includes a first mounting member 32 as a first mounting member and a second mounting member 3 as a second mounting member.
4 is elastically assembled via a first rubber elastic body 36 and a second rubber elastic body 38. In the body mount 30, the first mounting bracket 32 is fixed to the frame 40 as the first connected body, while the second mounting bracket 34 is fixed to the vehicle body 42 as the second connected body. As a result, the vehicle body 4 is interposed between the frame 40 and the vehicle body 42 in a state where the vertical direction in FIG.
2 is supported on the frame 40 by vibration isolation. In such a mounted state, the supporting load of the vehicle body 42 and the main vibration to be damped are input in the vertical direction in FIG. In the following description, the terms “upper” and “lower” refer, in principle, to the vertical direction in FIG.

More specifically, as shown in FIG. 2, the first mounting member 32 has a cylindrical tubular portion 44, and the axial direction of the tubular An annular plate-shaped support plate portion 46 extending radially outward is formed integrally with the upper opening peripheral edge portion. Further, the support plate 4
6 has a substantially cylindrical shape rising upward in the axial direction, and its protruding tip portion has a flange shape or a flange shape radially outward over the entire circumference. A substantially annular stopper 48 that rises at a predetermined height upward in the axial direction is formed at the outer peripheral edge of the support plate 46 by being curved.

A first radial compression rubber 50 having a cylindrical shape is provided on the inner peripheral surface of the cylindrical body portion 44 of the first mounting bracket 32, and the inner peripheral surface of the cylindrical body portion 44 is formed. The cylindrical body portion 44 is covered with a substantially constant thickness over substantially the entire surface.
Vulcanized adhesive. Further, a first axial compression rubber 52 having a thick cylindrical shape and projecting upward in the axial direction is vulcanized and bonded to the support plate portion 46. The inner peripheral surface of the first axially compressed rubber 52 is a tapered surface 54 that linearly expands in diameter from the support plate portion 46 toward the upper side in the axial direction. It is smaller than the radial width of the base end. Note that the first axially compressed rubber 52 is integrally formed at the lower end in the axial direction so as to be connected to the upper end in the axial direction of the first radially compressed rubber 50.

Further, on the outer peripheral surface side of the first axially compressed rubber 52, there is provided a concave groove-shaped straight portion 56 which is located at an intermediate portion in the axial direction and is opened on the outer peripheral surface and extends continuously in the circumferential direction. Is formed. And, by this tick part 56,
The spring characteristics of the first axial compression rubber 52 are adjusted, and in combination with the tapered surface 54 of the inner peripheral surface, the first axial compression rubber 52 Sometimes, it is prevented from buckling down inward in the radial direction, so that stable deformation is generated and effective elasticity is exerted.

In particular, in the present embodiment, as shown in FIG. 3, corners 58, 60 on both sides in the up-down width direction at the bottom of the hollow portion 56 apply external force to the first axial compression rubber 52. In the state where it is not applied, it is formed with an arc-shaped cross section having different radii of curvature, and the radius of curvature: Ra of the corner 58 on the base side in the protruding direction of the first axially compressed rubber 52 is Ra The radius of curvature of the corner 60 is set smaller than Rb. Thereby, when the first axially-compressed rubber 52 is axially compressed and deformed, the
6 is reduced or prevented from being concentrated on the tip corner 58 due to the formation of the first compression rubber 5.
The buckling deformation in which the protruding tip side portion of the 2 is bent outward in the radial direction at the bulging portion 56 is suppressed, and more stable deformation is generated, and cracks and the like due to local deformation are suppressed. And durability is advantageously ensured.

Further, the first axially compressed rubber 52 has a large diameter such that the lower portion (base portion) of the bulging portion 56 extends radially outward.
A rubber cushion 62 having an annular shape with a predetermined thickness and covering the protruding tip of the stopper 48 formed on the first mounting bracket 32.
However, it is integrally formed with the first axial compression rubber 52.

In short, in the present embodiment, the first radial compression rubber 50, the first axial compression rubber 52, and the cushion rubber 6
2 are integrally formed with each other to form a first rubber elastic body 36, and are formed as a first integrally vulcanized molded product 64 having a first mounting bracket 32. Further, a suitable number of through holes 66 are provided in the cylindrical body portion 44 and the support plate portion 46 of the first mounting member 32, and the rubbers 50, 52 are formed through the through holes 66 by the rubber 50, 52. By being turned to the outer peripheral surface and the lower surface in the axial direction of the support plate portion 46, a thin mounting rubber layer 68 is formed on the outer peripheral surface of the cylindrical body portion 44 and the lower surface in the axial direction of the support plate portion 46.

On the other hand, the second mounting member 34 has a cylindrical shape, and has an outer diameter of the cylindrical portion 4 of the first mounting member 32.
4 is set to be smaller than the inner diameter of the first radial compression rubber 50, and the axial length is set to be larger than the axial size of the first mounting bracket 32. ing. Also, as shown in FIG. 4, a first end fitting 70 as a first end member is axially superimposed on the axially upper end of the second mounting fitting 34, They are integrally fixed by welding.

The first end fitting 70 has a center hole 74 at the center which communicates with the inner hole 72 of the second mounting fitting 34, and has an axial end at the axial end of the first end fitting 70. A disk-shaped first pressure-contact plate portion 76 extending in a right angle direction, and a large-diameter cylindrical cover tube portion 78 protruding axially downward from an outer peripheral edge of the first pressure-contact plate portion 76. And has a substantially inverted cup shape as a whole. The protruding distal end of the cover cylinder 78 is bent outward in the radial direction into a flange shape or a flange shape to form an annular contact portion 80 that is continuous in the circumferential direction.

A second end fitting 82 as a second end member is axially superimposed on an axially lower end of the second mounting fitting 34, and Inner hole 72
And is fixedly fastened by mounting bolts 85 that are inserted through. As shown in FIG. 5, the second end fitting 82 has a disc-shaped mounting plate 86 having a center hole 84 at the center thereof, which is communicated with the inner hole 72 of the second mounting fitting 34. A cylindrical outer tube portion 88 protruding axially upward from the outer peripheral edge of the mounting plate portion 86; and a circle extending radially outward from the protruding tip end of the outer tube portion 88. And a second pressure-contacting plate portion 90 having an annular shape. The outer tube 88 has an inner diameter that is larger than the outer diameter of the tube 44 of the first fitting 32. In addition, the second press-contact plate portion 90 has an inner diameter slightly larger than the support plate 46 of the first mounting bracket 32 and an outer diameter slightly smaller than the support plate 46.

Further, a second radially-compressed rubber 92 having a cylindrical shape is provided on the inner peripheral surface of the outer cylindrical portion 88 of the second end fitting 82 with the large cylindrical portion 44 of the first fitting 32. Are formed with an inner diameter dimension smaller than the outer diameter dimension.
Furthermore, a second axial compression rubber 94 which has a cylindrical shape and protrudes upward in the axial direction is provided on the second pressing plate portion 90. Like the first axial compression rubber 52, the inner peripheral surface of the second axial compression rubber 94 extends upward from the second press-contact plate portion 90 in the axial direction under no external force. A tapered surface 96 that linearly expands in diameter as it goes, is located at an axially intermediate portion on the outer peripheral surface side, and has a concave groove-shaped straight portion that opens to the outer peripheral surface and extends continuously in the circumferential direction. 98 are formed so that stable axial compressive deformation can be caused.

In the present embodiment, as shown in FIG. 6, the curving portion 98 of the second axially compressed rubber 52 is also similar to the curving portion 56 of the first axially compressed rubber 52, as shown in FIG. In a state where no external force is applied, the corners 100 and 102 on both sides in the vertical width direction at the bottom have an arc-shaped cross-sectional shape, and the radius of curvature: Rc of the corner 100 on the base side at the bottom is equal to the tip. The radius of curvature of the side corner 102 is set to be smaller than Rd, whereby the axial compression deformation of the second axial compression rubber 52 is stably generated, and good durability is secured. It is supposed to be.

In this embodiment, the second radially compressed rubber 92 and the second axially compressed rubber 94 are formed integrally with each other to form the second rubber elastic body 38, and the second rubber elastic body 38 is formed. It is formed as a second integrally vulcanized molded product 104 having end fittings 82. Further, an appropriate number of through holes 106 are provided in the second press-contact plate portion 90 of the second end fitting 82, and the second axial compression rubber 94 is formed through these through holes 106. Is pressed to the lower surface in the axial direction of the pressure contact plate portion 90 and is vulcanized and bonded.

Then, the first integrally vulcanized molded product 64 and the second integrally vulcanized molded product 104 configured as described above,
The second mounting fitting 34 to which the first end fitting 70 is welded.
Are assembled to each other to form a target body mount 30. In the present embodiment, at the same time as the assembling, the body mount 30 is
It is designed to be mounted between the frame 40 and the vehicle body 42.

Specifically, first, the first integrally vulcanized molded product 64 is inserted into the mounting hole 108 penetrated through the frame 40.
And the cylindrical body portion 44 of the first mounting member 32 is inserted and fitted, and the support plate portion 46 of the first mounting member 32 is placed on the frame 40 so as to overlap. Next, the second mounting member 34 is axially inserted from above into the first integrally vulcanized molded product 64, and the second mounting member 34 is pressed into the first radially compressed rubber 50. . Subsequently, the first end fitting 70 is superimposed on the lower surface of the vehicle body 42, and the mounting bolt 85 inserted from above into the mounting hole 110 formed in the vehicle body 42 is attached to the first end fitting 70. Through the center hole 74 of the second mounting bracket 34. Further, a second integrally vulcanized molded product 104 is assembled from below the second mounting bracket 34 in the axial direction, and the second integral vulcanized molded product 104 is assembled from the second mounting bracket 34 by the mounting bolt 85 protruding downward in the axial direction. The second end metal fitting 82 constituting the vulcanized molded product 104 is tightened, overlapped and fixed to the axial lower end of the second mounting metal fitting 34, and the second radial compression rubber 92 is attached to the first mounting metal fitting 34. The metal fitting 32 is pressed into the outer peripheral surface of the cylindrical body part 44.

In the body mount 30 formed in this manner, the second mounting bracket 34 is fixedly mounted on the vehicle body 42 by the tightening force of the mounting bolt 85, and Due to the tightening force of the bolt 85 and the load of the vehicle body 42 input between the second mounting bracket 34 and the first mounting bracket 32, the first axial compression rubber 50 is
The support plate 46 of the first fitting 32 and the first end fitting 7
0 is compressed in the axial direction between the first pressing plate 76 and the second compressed rubber 94 in the support plate 46.
Are compressed in the axial direction between the frame 40 superposed on the lower surface of the second end fitting 82 and the second press-contact plate portion 90 of the second end fitting 82. Then, based on the elasticity of the first axial compression rubber 50 and the second axial compression rubber 94, the support plate portion 46 of the first mounting bracket 32 is fixed so as not to be separated from the frame 40. Is pressed against.

That is, in the body mount 30 having such a structure, the first mounting bracket 32 fixedly mounted on the frame 40 and the second mounting bracket fixedly mounted on the vehicle body 42. The first and second radially compressed rubbers 50 and 92 and the first and second axially compressed rubbers 52 and 94 are interposed between the metal fitting 34 and the first and second radially compressed rubbers. The first fitting 32 and the second fitting 3 are based on the elastic deformation of the directional compression rubbers 50 and 92.
4 and the frame 40 of the vehicle body 42
Is allowed in the horizontal direction (for example, in the lateral direction of the vehicle), and the first and second axial compression rubbers 52, 94
, The relative displacement of the first fitting 32 and the second fitting 34 in the axial direction and, consequently, the displacement of the vehicle body 42 in the vertical direction (vehicle vertical direction) with respect to the frame 40 are allowed. It is.

Therefore, in the body mount 30, the first mounting bracket 32 can be easily fixed to the frame 40 without requiring any special fixing means such as bolts, and a single mounting bolt 85. The fixing operation of the first mounting member 32 to the frame 40 and the fixing of the second mounting member 34 to the vehicle body 42 can be performed at the same time only by the mounting operation of, so that extremely excellent mounting workability is exhibited. In particular, by assembling the first mounting bracket 32 and the second mounting bracket 34 with the mounting bolts 85, the mounting
Since the mounting on the vehicle is completed, more excellent mounting workability is exhibited.

The vehicle body 4 input in the mount axis direction
With respect to the supporting load of 2, the spring stiffness based on the compression deformation of the first axial compression rubber 52 exerts an effective supporting strength, and the first and the second vibrations with respect to the input vibration in the mounting axial direction. An effective vibration damping effect is exhibited by the elastic deformation of the second axial compression rubbers 52, 94. There, the first and second axially compressed rubbers 52, 94
Are mounted in such a manner that the curving portions 56, 98 formed on the outer peripheral surface are not crushed. When a vibration load is input, soft spring characteristics are exhibited until the curling portions 56, 98 are crushed. And at the same time
After crushing, the rigid spring characteristic is exhibited, so that the non-linear spring characteristic is exhibited with respect to the input load. A good anti-vibration effect is exhibited also against vibration.

Moreover, the first and second axially compressed rubbers 5
Since the inner peripheral surfaces of the second and second 94 are tapered surfaces 54 and 96, the inner peripheral surface is reduced or prevented from being pressed against or interfered with the second mounting member 34 or the cylindrical body portion 44 during elastic deformation. As a result, the change in the axial spring characteristic caused by the press-contact and the interference is avoided, and the intended vibration-proof performance is stably exhibited with sufficient durability.

The first and second axially compressed rubbers 5
2, 94 have tapered surfaces 54, 96 on the inner peripheral surface, and are formed with bulging portions 56, 98 that open on the outer peripheral surface, so that they are radially inward at the time of compressive deformation in the axial direction. Buckling is prevented, and stable elastic deformation is generated, so that the intended spring characteristics are exhibited with stability and excellent durability.
In particular, the outer peripheral surface of the distal end portion of the first axial compression rubber 52 is covered with a cover cylinder portion 78 of the first end fitting 70 at a predetermined distance in the radial direction, and radially outward. Buckling deformation such as crushing is also prevented by the contact with the cover tube portion 78, and therefore, with respect to an input load that causes the first axial compression rubber 52 to undergo compression deformation. In addition, more effective spring characteristics can be stably exhibited.

Further, between the first mounting bracket 32 and the second mounting bracket 34, a stopper portion 48 which is opposed to the vehicle body 42 at a predetermined distance in the bounding direction in which the supporting load of the vehicle body 42 is inputted, is provided. A stopper mechanism is configured by the contact portion 80, and when an excessive bound load is input,
When the stopper portion 48 and the contact portion 80 are in contact with each other via the buffer rubber 62, the amount of displacement in the bounding direction of the first fitting 32 and the second fitting 34 is buffered. In particular, in the present embodiment, since the cushion rubber 62 is formed to have a thickness enough to exhibit effective elasticity, even if the stopper mechanism operates after the bulging portion 56 is crushed, the cushion rubber 62 is The effective vibration damping effect is exerted on the basis of the sufficiently hard spring characteristic based on the elastic deformation.

On the other hand, with respect to a roll load or the like input in the radial direction of the mount, the first and second radially compressed rubbers 50 and 92 undergo compressive deformation, so that a large spring rigidity is effectively provided. It is exerted, whereby the steering stability of the vehicle is advantageously ensured.
In the body mount 30 in particular, the first and second radially-compressed rubbers 50 and 92 are located at portions sufficiently separated from the first and second axially-compressed rubbers 52 and 94, respectively, and are substantially provided. , It is possible to set a large spring stiffness for the first and second radially compressed rubbers 50 and 92 irrespective of the required characteristics in the axial direction. Second radial compression rubber 50, 9
2 and the transmission of deformation and stress between the first and second axial compression rubbers 52 and 94 are prevented, and the desired spring characteristics can be stably obtained in the axial direction and the radial direction, respectively. You can.

In the body mount 30 as described above, the first radial compression rubber 50 and the second radial compression rubber 92 independently increase the spring stiffness against an input load in the mount radial direction. Since the spring stiffness can be easily adjusted, the spring stiffness in the radial direction can be easily tuned, and a large degree of freedom in setting can be secured, so that a large spring stiffness can be more easily secured. Since both the cylindrical body portion 44 and the externally inserted cylindrical portion 88 exerting the compressive force are larger in diameter than the second mounting bracket 34, the radial load on the second radially compressed rubber 92 is reduced. The effective working area is advantageously ensured, so that a large spring stiffness can be more easily ensured.

Further, in the body mount 30 of the present embodiment, the first mounting bracket 32 and the second mounting bracket 34 are connected based on the elastic deformation of the first and second radial compression rubbers 50 and 92. Direction (first mounting bracket 3)
Effective spring characteristics can be exhibited even with a load in the direction in which the second mounting member 34 is inclined with respect to the second cylindrical body portion 44).

Although the embodiment of the present invention has been described in detail above, this is a literal example.
This embodiment is not to be construed as limiting in any way, and various changes, modifications,
It can be implemented in an aspect with improvements and the like,
Further, the scope of application of the present invention is not limited to the body mount illustrated in the above-described embodiment, and the present invention is advantageous for various cylindrical anti-vibration supports such as a cab mount and a subframe mount. Can be applied.

[0058]

As is apparent from the above description, in the cylindrical vibration-damping support having the structure according to any one of the first to seventh aspects of the present invention, any one of the first connected body and Since it can be mounted on the second connected body very easily, simplification of the mounting structure for the first and second connected bodies can be achieved, and excellent mounting workability can be realized. .

Further, in such a cylindrical vibration-proof support,
The first and second axial compression rubbers ensure sufficient support spring characteristics and anti-vibration characteristics for axial input loads,
The first and second radial compression rubbers can advantageously secure spring stiffness against a radial input load.

Further, the first axially compressed rubber has a flared portion formed in the outer peripheral surface thereof to facilitate tuning of the spring characteristic and to effectively and stably provide the non-linear spring characteristic. It is possible to advantageously exhibit both good vibration isolation performance and excellent spring stiffness.

Further, a stopper mechanism for limiting the relative displacement of the first mounting member and the second mounting member in the axial direction when an excessive axial load is input is provided by a special member or complicated structure. It can be advantageously configured in the first mounting bracket and the second mounting bracket without accompanying.

[Brief description of the drawings]

FIG. 1 is an explanatory longitudinal sectional view showing an automobile body mount as one embodiment of the present invention in a state of being mounted on an automobile.

FIG. 2 is a longitudinal sectional view showing a first integrally vulcanized molded product constituting the body mount shown in FIG.

FIG. 3 is an enlarged sectional view of a main part of the first integrally vulcanized molded product shown in FIG. 2;

FIG. 4 is a longitudinal sectional view showing a second mounting bracket constituting the body mount shown in FIG. 1;

FIG. 5 is a longitudinal sectional view showing a second integrally vulcanized molded product constituting the body mount shown in FIG. 1;

FIG. 6 is an enlarged sectional view of a main part of the second integrally vulcanized molded product shown in FIG. 5;

FIG. 7 is a longitudinal sectional view showing a specific example of a cylindrical anti-vibration support having a conventional structure.

FIG. 8 is a vertical cross-sectional view showing another specific example of a cylindrical anti-vibration support having a conventional structure.

[Explanation of symbols]

 Reference Signs List 30 body mount 32 first mounting bracket 34 second mounting bracket 36 first rubber elastic body 38 second rubber elastic body 40 frame 42 vehicle body 44 cylindrical body part 46 support plate part 48 stopper part 50 first radial direction Compressed rubber 52 First compressed rubber in the axial direction 56 Fastening portion 62 Buffer rubber 70 First end fitting 76 First press contact plate 78 Cover cylinder 80 Contact portion 82 Second end fitting 85 Mounting bolt 86 Mounting Plate portion 88 External insertion tube portion 90 Second press-contact plate portion 92 Second radial compression rubber 94 Second axial compression rubber

Claims (7)

[Claims] 1. A cylindrical anti-vibration support interposed between a first connected body and a second connected body to connect the two connected bodies in a vibration-proof manner. Body portion, and a ring-shaped support plate portion extending outward in the direction perpendicular to the axis from one axial end of the cylindrical body portion, and the outer peripheral edge of the support plate portion is axially outward. An upright annular stopper portion is formed, and the cylindrical body portion is inserted into a mounting hole provided in the first connected member, and the support plate portion is attached to the first connected member. A first attachment member attached to the first connected member in an overlapped state, having an outer diameter smaller by a predetermined dimension than an inner diameter of a cylindrical body of the first attachment member, A rod-like member that is inserted into the mounting member and is disposed so as to protrude on both axial sides of the first mounting member, and is fixedly mounted to the second connected member. A second mounting member, which extends outward in a direction perpendicular to the axis from one end in the axial direction of the second mounting member, and is opposed to the support plate portion of the first mounting member in the axial direction. A first press-contact plate in the form of an annular plate to be urged, and a cylindrical cover tube protruding axially from an outer peripheral edge of the first press-contact plate toward the first mounting member. A first end member in which a projecting distal end of the cover tubular portion is a contact portion axially opposed to a stopper portion of the first mounting member; Extending axially inward from the other end in the axial direction so as to cover the end of the second mounting member,
A cylindrical outer tubular portion that is extrapolated radially outwardly away from the tubular body portion of the first mounting member, and extends outward in the direction perpendicular to the axis from the open end of the outer tubular portion. An annular plate-shaped second pressure-contacting plate portion which is axially spaced and opposed to a surface of the first connected member opposite to the surface on which the support plate portion is overlapped. A second end member, radially protruding from the cylindrical body of the first mounting member,
A first radially compressed rubber pressed against the outer peripheral surface of the second mounting member, and a first pressing member of the first end member protruding in an axial direction from the support plate portion of the first mounting member; A first axial compression rubber pressed against the plate portion, and a cushioning rubber provided on a surface of the first mounting member opposite to the contact portion of the stopper portion, and A threaded portion is formed on the outer peripheral surface of the axially compressed rubber and extends continuously in the circumferential direction, and the inner peripheral surface of the first axially compressed rubber gradually expands in the protruding direction, and A first rubber elastic body separated from the outer peripheral surface of the second mounting member and adhered to the first mounting member, radially protruding from the outer cylindrical portion of the second end member;
A second radial compression rubber pressed against an outer peripheral surface of the cylindrical body portion of the first mounting member, and an axially projecting protruding from the second pressing plate portion of the second mounting member; And a second rubber elastic body adhered to the second end member. Cylindrical anti-vibration support. 2. A corner portion on both sides in a width direction at a bottom portion of a hollow portion provided on the first axially-compressed rubber has an arc-shaped cross section in a free shape of the first axially-compressed rubber. 2. The cylindrical vibration isolating support according to claim 1, wherein a radius of curvature of a corner on the base side of the first axially compressed rubber is set to be smaller than a radius of curvature of a corner on the protruding tip side. . 3. An interposed state between the first connected body and the second connected body, wherein an opening dimension of a burring portion provided on the first axially-compressed rubber is the same as that of the first connected rubber. The cylindrical anti-vibration support according to claim 1 or 2, wherein a distance between an abutting portion of the one end member and an opposing surface with respect to a cushioning rubber provided on the stopper portion is set smaller. 4. A second opening in the second rubber elastic body which is formed on the outer peripheral surface of the second axially compressed rubber and extends continuously in the circumferential direction. The cylindrical shape according to any one of claims 1 to 3, wherein an inner peripheral surface of the compressed rubber gradually expands in a protruding direction and is separated from an outer peripheral surface of the cylindrical body portion in the first mounting member. Anti-vibration support. 5. In the assembled state of the first mounting member and the second mounting member, an axial height of the second axially compressed rubber in the second rubber elastic body is equal to the first height. The cylindrical vibration-isolation support according to any one of claims 1 to 4, wherein the height of the first elastic rubber in the rubber elastic body is not more than 1/2 of the height in the axial direction. 6. In the assembled state of the first mounting member and the second mounting member, the radial height of the second radial compression rubber in the second rubber elastic body is equal to the first height. The cylindrical anti-vibration support according to any one of claims 1 to 5, wherein the height of the first elastic rubber in the rubber elastic body is less than or equal to 1/2 of a radial height of the first radial rubber. 7. One of the first end member and the second end member is formed integrally with the second mounting member, while the first end member and the second end member are formed integrally with the second mounting member. The other one of the end members is formed separately from the second mounting member, and is fixed by being overlapped with the axial end of the second mounting member inserted through the first mounting member. The cylindrical anti-vibration support according to any one of claims 1 to 6, wherein