JP6285190B2 - Vibration isolator - Google Patents

Description

  The present invention relates to a vibration isolator used for, for example, an automobile.

  An example of a conventional vibration isolator for a vehicle is shown in FIG. 6 includes a first bush 210 attached to the vehicle body 300, a second bush 220 attached to an engine (not shown), and a connecting rod that connects the first bush 210 and the second bush 220 together. 230. The first bush 210 includes an inner cylinder 211 coupled to the vehicle body 300, an outer cylinder 219 coupled to the coupling rod 230, a main body elastic body 214 connecting the inner cylinder 211 and the outer cylinder 219, and an outer cylinder 219. It has fixed stopper elastic bodies 215 and 216.

  In the illustrated example, when the engine vibrates in the vertical direction (Z-axis direction in the figure) when the vehicle suddenly starts, quick clutch, etc., the outer cylinder 212 of the first bush 210 is centered on the second bush 220 side (see FIG. In this example, the vibration isolator 1 is rotated (within the XZ plane) and the pendulum-like motion is performed. At this time, the end edge 219a of the outer cylinder 219 may interfere with the vehicle body 300 to generate a metallic sound.

  In order to suppress interference between the outer cylinder 219 and the vehicle body 300 at the time of vibration input to such a vibration isolator, the edge 219a of the outer cylinder 219 is covered with a rubber plate separate from the first bush 210. A method can be considered. Further, as proposed in Patent Document 1, a method of providing rubber protrusions protruding outward from both axial ends of the outer cylinder 212 on both axial sides of the rubber elastic body of the first bush 210 may be considered. .

JP 2005-188575 A

  However, the method of covering the end 219a of the outer cylinder 219 with a separate rubber plate has a problem that the cost increases. On the other hand, in the method of providing the rubber protrusion, when the large vibration is input or when the vibration isolator is bent in the left-right direction, the displacement of the outer protrusion 219 toward the vehicle body 300 cannot be suppressed. There is a risk of interference between the cylinder 219 and the vehicle body 300.

  The present invention is for solving the above-described problems, and provides a vibration isolator capable of reliably preventing interference with an external member such as a vehicle body during vibration input while avoiding an increase in cost. It is the purpose.

An anti-vibration device according to the present invention includes an outer cylinder connected to one of a vibration generator and a vibration receiver, and an inner cylinder on the inner peripheral side of the outer cylinder, and one of the vibration generator and the vibration receiver. An inner cylinder connected to the other, an intermediate elastic body provided between the inner cylinder and the outer cylinder, and the intermediate so as to protrude from the intermediate elastic body toward the outer side in the axial direction of the inner cylinder. And an elastic stopper portion that is provided on the elastic body and can cover at least a part of an end edge of the outer cylinder by deformation of the intermediate elastic body at the time of vibration input.
According to the vibration isolator of the present invention, it is possible to reliably prevent interference with an external member during vibration input while avoiding an increase in cost.

  In the vibration isolator of the present invention, it is preferable that the elastic stopper portion has an inclined surface that inclines toward the radially outer side of the inner cylinder toward the outer side in the axial direction of the inner cylinder. Thereby, at the time of vibration input, the elastic stopper portion easily falls down toward the radially outer side of the inner cylinder, so that interference with the external member can be sufficiently prevented.

  In the vibration isolator of the present invention, it is preferable that the radial distance from the inner cylinder to the elastic stopper is not less than 1/3 of the radial distance from the inner cylinder to the outer cylinder. Thereby, at the time of vibration input, since the elastic stopper portion easily falls down toward the radially outer side of the inner cylinder, it is possible to more reliably prevent interference with the external member.

  In the vibration isolator of the present invention, the intermediate elastic body includes a main body elastic body that connects the inner cylinder and the outer cylinder, and is fixed to the outer cylinder, and the shaft of the inner cylinder is fixed in the radial direction of the inner cylinder. A stopper elastic body that is independent of the main body elastic body and faces the inner cylinder across a hollow portion penetrating in the direction, and the elastic stopper portion is provided on the main body elastic body and the stopper elastic body, respectively. It is preferable to be provided. Thereby, since an elastic stopper part will be provided over a wide angle range, it can prevent more reliably interference with an external member.

  The vibration isolator of the present invention includes a second outer cylinder connected to the outer cylinder via a connecting rod, a second inner cylinder arranged on the inner peripheral side of the second outer cylinder, and the second inner cylinder. And a second intermediate elastic body provided between the second outer cylinder and the second outer cylinder. Thereby, even if the space | interval of a vibration generation part and a vibration receiving part is separated, a vibration isolator can be connected to both and it can prevent that the vibration from a vibration generation part to a vibration receiving part is transmitted.

  According to the vibration isolator according to the present invention, it is possible to provide a vibration isolator capable of reliably preventing interference between the outer cylinder and the external member during vibration input while avoiding an increase in cost.

It is a top view which shows one Embodiment of the vibration isolator of this invention. It is II sectional drawing in alignment with an inner cylinder axial direction which shows the 1st bush of FIG. 1 when vibration is not input. It is II sectional drawing which follows the inner cylinder axial direction which shows the principal part of the 1st bush of FIG. 1 when vibration is input. It is a top view which shows the modification of the vibration isolator of this invention. It is a perspective view which shows the 1st bush of FIG. It is a perspective sectional view showing the conventional vibration isolator attached to the vehicle body.

Hereinafter, embodiments of the vibration isolator according to the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of the vibration isolator of the present invention. The vibration isolator 1 of the present embodiment includes a first bush 10 and a connecting rod that connects the second bush 20 and the first bush 10 and the second bush 20 with a smaller diameter than the first bush 10 in the illustrated example. 30 is a torque rod for a vehicle.

As shown in FIG. 1, the first bush 10 includes an outer cylinder 9, an inner cylinder 11 disposed on the inner peripheral side of the outer cylinder 9, and an intermediate elasticity provided between the inner cylinder 11 and the outer cylinder 9. And a body 50.
In this example, the outer cylinder 9 is connected to a vibration generating part (such as an engine) via a connecting rod 30 and a second bush 20 extending in the front-rear direction of a vehicle (not shown), and the inner cylinder 11 is vibrated. It is connected with a receiving part (body 300 in this example).
However, the outer cylinder 9 may be directly connected to the vibration generating unit without using the connecting rod 30 and the second bush 20. Further, the inner cylinder 11 may be connected to the vibration generating part, and the outer cylinder 9 may be connected to the vibration receiving part. The connecting rod 30 may extend in any direction of the vehicle.
In this example, the outer cylinder 9 includes an outer peripheral side outer cylinder 12 fixed to the connecting rod 30 and an inner peripheral side outer cylinder 13 press-fitted into the inner peripheral surface of the outer peripheral side outer cylinder 12. However, the outer cylinder 9 may not include the inner peripheral side outer cylinder 13.
In the case where the outer cylinder 9 includes the outer peripheral side outer cylinder 12 and the inner peripheral side outer cylinder 13 as in this example, the “end 9a of the outer cylinder 9” is hereinafter referred to as the inner cylinder of the entire outer cylinder 9. The outermost edge in the axial direction, that is, the outermost edge in the inner cylinder axial direction of the outer cylinder 12 on the outer cylinder side and the outermost edge in the inner cylinder axis direction of the outer cylinder 13 on the outer circumference side.

In the following description, the extending direction of the connecting rod 30 (in this example, the direction that becomes the front-rear direction of the vehicle when attached to the vehicle body) is referred to as the “X-axis direction”, and the axial direction of the inner cylinder 11 (hereinafter, referred to as “X-axis direction”). Also referred to as “inner cylinder axial direction.” In this example, the direction that is the vertical direction of the vehicle when attached to the vehicle body is defined as the “Z axis direction”, and the radial direction of the inner cylinder 11 (hereinafter “inner cylinder radial direction”). In a plane parallel to the direction of the inner cylinder axis, the direction perpendicular to the X-axis direction (in this example, the direction that becomes the left-right direction of the vehicle when attached to the vehicle body). “Y-axis direction”.
Note that FIG. 1 is a view as seen from the lower side of FIG. 2 as instructed in the XYZ axis directions of FIGS. 1 and 2.

On the other hand, the second bush 20 includes a second outer cylinder 22 connected to the outer cylinder 9 via a connecting rod 30, a second inner cylinder 21 disposed on the inner peripheral side of the second outer cylinder 22, and a second A second intermediate elastic body 24 provided between the inner cylinder 21 and the second outer cylinder 22. Since the vibration isolator 1 further includes the connecting rod 30 and the second bush 20, vibration from the vibration generating unit to the vibration receiving unit is transmitted even if the interval between the vibration generating unit and the vibration receiving unit is separated. Can be prevented.
In this example, the axial direction of the inner cylinder 11 of the first bush 10 and the axial direction of the second inner cylinder 21 of the second bush 20 extend in parallel to each other. It may extend in the direction.

  The first bush 10 includes one or more (three in the illustrated example) elastic stopper portions 40 to 40 provided on the intermediate elastic body 50 so as to protrude outward from the intermediate elastic body 50 in the inner cylinder axial direction. 42 is further provided. In the example of the figure, the elastic stopper portions 40 to 42 protrude outward in the inner cylinder axial direction from the outer peripheral side outer cylinder 12 and the inner peripheral side outer cylinder 13. The elastic stopper portions 40 to 42 are at least part of the edge 9a of the outer cylinder 9 in the inner cylinder axial direction due to deformation of the intermediate elastic body 50 when vibration is input from the vibration generator to the vibration isolator 1 (see FIG. In this example, the outer peripheral side outer cylinder 12 and the inner peripheral side outer cylinder 13 are formed so as to be able to cover a part of the edge of the outer peripheral side outer cylinder 12 and the entire inner cylinder radial direction. More specifically, as will be described in detail later, the elastic stopper portions 40 to 42 have inclined surfaces 40 a to 42 a that are inclined toward the outer side in the inner cylinder radial direction toward the outer side in the inner cylinder axis direction, Thereby, it is easy to fall toward the outer side in the inner cylinder radial direction at the time of vibration input. When the vibration isolator 1 is attached to the vehicle body 300, the elastic stopper portions 40 to 42 prevent interference between the outer cylinder 9 and the vehicle body 300 (external member) during vibration input.

  The intermediate elastic body 50 connects the inner cylinder 11 and the outer cylinder 9 (more specifically, the inner peripheral side outer cylinder 13 in the example of the figure). A body 14 and stopper elastic bodies 15 and 16 on both sides in the X-axis direction in the illustrated example are fixed to the outer cylinder 9 (more specifically, in the illustrated example, the inner circumferential outer cylinder 13). The stopper elastic bodies 15, 16 are opposed to the inner cylinder 11 with the hollow portions 17, 18 penetrating in the inner cylinder axial direction in the illustrated example and sandwiching the cavity portions 17, 18 on both sides in the X axis direction in the inner cylinder radial direction.

In the example of the figure, the pair of main body elastic bodies 14 has their one ends connected to both sides in the Y-axis direction of the inner cylinder 11 and as they move away from the second bush 20 in the X-axis direction, The other end of each is connected to the inner peripheral side outer cylinder 13.
When vibration is input from the vibration generator to the vibration isolator 1 in an arbitrary direction of the vehicle, the main body elastic body 14 is displaced in the inner cylinder axial direction and / or the inner cylinder radial direction of the outer cylinder 9 with respect to the inner cylinder 11. In response to the elastic deformation, the elastic deformation absorbs the vibration. Thereby, the vibration from the vibration generating unit is suppressed from being transmitted to the vehicle body 300.

The stopper elastic bodies 15, 16 are independent from the main body elastic body 14, and in this example, protrude from the inner peripheral side outer cylinder 13 toward the inner cylinder 11 on both sides in the X-axis direction. Here, the stopper elastic bodies 15 and 16 are “independent” from the main body elastic body 14, that is, the main body elastic body 14 and the stopper elastic bodies 15 and 16 can be deformed independently of each other, It is assumed that the body 14 is not affected by the stopper elastic bodies 15 and 16 because of its own anti-vibration function. For example, for manufacturing reasons, the body elastic body 14 and the stopper elastic body 15, 16 includes a thin elastic body portion fixed to the inner peripheral side outer cylinder 13 and the like.
In the present embodiment, the stopper elastic bodies 15 and 16 are directly fixed (fixed) to the inner peripheral side outer cylinder 13 by, for example, vulcanization adhesion, but at least one of the stopper elastic bodies 15 and 16 is fixed. It is also possible to indirectly fix the inner peripheral side outer cylinder 13 via another member.
The stopper elastic bodies 15 and 16 are arranged such that when a relatively large vibration is input from the vibration generating unit to the vibration isolator 1 in the front-rear direction of the vehicle, the outer cylinder 9 is in the inner cylinder radial direction (more specifically, Specifically, along with the large displacement in the X-axis direction, each of them alternately hits the inner cylinder 11 (more specifically, a thin elastic body portion covering the inner cylinder 11) to function as a stopper. Since the stopper elastic bodies 15 and 16 are made of an elastic body, it is possible to reduce the hitting sound when the stopper elastic bodies 15 and 16 hit the inner cylinder 11.

  In this example, elastic stopper portions 40 and 41 are provided on the pair of main body elastic bodies 14 on one side in the inner cylinder axial direction, respectively, and on the opposite side to the second bush 20 with respect to the inner cylinder 11. The stopper elastic body 15 is provided with an elastic stopper portion 42.

  Further, in this example, as shown in FIG. 2, the elastic stopper portion 16 on the second bush 20 side with respect to the inner cylinder 11 is located on the other side (upper side in FIG. 2) in the inner cylinder axis direction. An axial stopper portion 43 that extends and is made of an elastic body is provided. When the outer cylinder 9 is displaced to the other side in the inner cylinder axial direction with respect to the inner cylinder 11 at the time of vibration input, the axial direction stopper portion 43 hits a vehicle body (not shown) on the other side in the inner cylinder axis direction, and serves as a stopper. Function.

In the vibration isolator 1 configured as described above, when the vibration generating portion vibrates in the vertical direction (Z-axis direction) of the vehicle, such as when the vehicle suddenly starts or during quick clutching, the outer cylinder 9 of the first bush 10. Is rotated in the XZ plane around the second bush 20 side, and the vibration isolator 1 performs a substantially pendulum-like motion. During this time, the main body elastic body 14 and the stopper elastic bodies 15 and 16 are elastically deformed according to the displacement of the outer cylinder 9 with respect to the inner cylinder 11 in the inner cylinder axis direction and the inner cylinder diameter direction (mainly the X axis direction). For example, when the outer cylinder 9 is displaced to the inner cylinder axial direction one side (lower side in FIG. 2) and the X-axis second bush 20 side (left side in FIG. 2) with respect to the inner cylinder 11, first, the main body elasticity The body 14 is elastically deformed (shear deformation or the like in the inner cylinder axis direction), whereby the elastic stopper portions 40 and 41 provided on the main body elastic body 14 are respectively tilted outward in the inner cylinder radial direction, and the outer cylinder 9 Part of the edge 9a (in this example, the edge of the outer peripheral side outer cylinder 12 and the end edge of the inner peripheral side outer cylinder 13). Thereafter, when the displacement of the outer cylinder 9 relative to the inner cylinder 11 further proceeds and the stopper elastic body 15 hits the inner cylinder 11 as shown in FIG. 3, the stopper elastic body 15 is also elastically deformed (in the inner cylinder radial direction). Compression, shear deformation and expansion in the inner cylinder axis direction, etc.), whereby the elastic stopper portion 42 provided on the stopper elastic body 15 falls to the outer side in the inner cylinder radial direction, and the end 9a of the outer cylinder 9 Cover part.
At this time, since the elastic stopper portions 40 to 42 are located between the end edge 9a of the outer cylinder 9 and the vehicle body 300, interference between the outer cylinder 9 and the vehicle body 300 is prevented.

In the above example, since the elastic stopper portion is provided in the main body elastic body 14 and the stopper elastic body 15, respectively, for example, compared with the case where the elastic stopper portion is provided only in one of the main body elastic body 14 or the stopper elastic body 15. Since the elastic stopper portion is provided over a wider angular range, interference between the outer cylinder 9 and the vehicle body 300 can be further reliably prevented against vibrations in various directions.
From this point of view, the elastic stopper portion is intermittent or continuous over a circumferential angular range of about 180 degrees along a part of the end 9a of the outer cylinder 9 where frequent interference with the vehicle body 300 is expected. It is preferable that the intermediate elastic body 50 is provided intermittently (in this example).
Note that “the portion of the edge 9a of the outer cylinder 9 where frequent interference with the vehicle body 300 is expected” varies depending on how the vibration isolator 1 is attached to the vehicle. Therefore, depending on how the vibration isolator 1 is attached to the vehicle, it is preferable to provide the elastic stopper portion on the other stopper elastic body 16 or on both sides of the intermediate elastic body 50 in the inner cylinder axis direction. There may be preferred cases.

In this example, the elastic stopper portions 40 to 42 have inclined surfaces 40 a to 42 a that are inclined toward the outer side in the inner cylinder radial direction toward the outer side in the inner cylinder axis direction. Thereby, at the time of vibration input, the elastic stopper portions 40 to 42 easily fall down toward the outer side in the inner cylinder radial direction, so that the interference between the outer cylinder 9 and the vehicle body 300 can be sufficiently prevented.
Further, as in the present example, when the inclined surfaces 40a to 42a are disposed in the inner cylinder radial direction inner side from the protruding tip of the elastic stopper portions 40 to 42, the inner cylinder radial direction outer side is further increased at the time of vibration input. When the intermediate elastic body 50 and the elastic stopper portions 40 to 42 are integrally molded, the mold is attached to the intermediate elastic body 50 without damaging the elastic stopper portions 40 to 42. And it can remove from the elastic stopper parts 40-42 toward an inner cylinder axial direction outer side. However, the elastic stopper portions 40 to 42 may be configured separately from the intermediate elastic body 50, and both may be fixed with an adhesive or the like.
The “protruding tip” of the elastic stopper portions 40 to 42 refers to the outermost portion of the elastic stopper portions 40 to 42 in the inner cylinder axis direction.

As in this example, the radial distance L1 from the outer peripheral surface of the inner cylinder 11 to the innermost radial position of the elastic stopper portions 40 to 42 is the inner peripheral surface of the outer cylinder 9 from the outer peripheral surface of the inner cylinder 11. In this example, it is preferably 1/3 or more of the inner cylinder radial direction distance L2 up to (inner peripheral surface of the inner peripheral side outer cylinder 13). Thereby, at the time of vibration input, the elastic stopper portions 40 to 42 become sufficiently thin in the inner cylinder radial direction and easily fall down toward the outer side in the inner cylinder radial direction, so that the interference between the outer cylinder 9 and the vehicle body 300 is further reduced. It can be surely prevented.
In addition, when providing multiple elastic stopper parts like the elastic stopper parts 40-42 of this example, the inner cylinder radial direction innermost position of each elastic stopper part may mutually differ.

The inclination angle θ on the acute angle side with respect to the inner cylinder radial direction of the inclined surfaces 40a to 42a of the elastic stopper portions 40 to 42 improves the ease of the elastic stopper portions 40 to 42 to fall outward in the inner cylinder radial direction at the time of vibration input. It is preferable that it is 15 to 45 degree | times from a viewpoint and the viewpoint of durability maintenance of the elastic stopper parts 40-42.
In addition, the inclination | tilt angle (theta) of the inclined surfaces 40a-42a of the elastic stopper parts 40-42 may mutually be the same, or may differ.
From the same viewpoint, the inner cylinder axial distance L3 between the protruding tip of the elastic stopper portions 40 to 42 and the edge 9a of the outer cylinder 9 on the side close to the protruding tip is the thickness of the outer cylinder 9. In this example, it is preferably 0.5 to 2.0 times the distance L4 corresponding to (the total thickness of the outer peripheral side outer cylinder 12 and the inner peripheral side outer cylinder 13).

  In addition, each dimension described in this specification shall point out the value when the external force is not acting with respect to the vibration isolator 1. FIG.

  The elastic stopper portion is formed by the deformation of the intermediate elastic body 50 at the time of vibration input, so that the end 9a of the outer cylinder 9 (in this example, the end edge of the outer peripheral outer cylinder 12 and the end edge of the inner peripheral outer cylinder 13). It is only necessary to cover at least a part. That is, in the above-described example, the inner peripheral side outer cylinder 13 and the outer peripheral side outer cylinder 12 are in substantially the same position in the inner cylinder axial direction, but for example, the inner peripheral side outer cylinder 13 is more inner than the outer peripheral side outer cylinder 12. When projecting outward in the axial direction, if the elastic stopper portion can cover at least a part of the edge of the inner peripheral side outer tube 13 at the time of vibration input, the inner peripheral side outer tube 13 (and thus the outer tube 9) and the external member Interference with can be prevented. For example, if the outer peripheral side outer cylinder 12 protrudes outward in the inner cylinder axial direction from the inner peripheral side outer cylinder 13, the elastic stopper portion covers at least a part of the edge of the outer peripheral side outer cylinder 12 when vibration is input. If possible, interference between the outer peripheral side outer cylinder 12 (and consequently the outer cylinder 9) and the external member can be prevented.

  The elastic stopper portion is limited to the one having the inclined surface as described above as long as it can cover at least a part of the end edge 9a of the outer cylinder 9 by deformation of the intermediate elastic body 50 at the time of vibration input. Absent. For example, the elastic stopper portion may protrude from the intermediate elastic body 50 toward the outer side in the inner cylinder axial direction, and may be curved or bent so that its protruding tip faces the outer side in the inner cylinder radial direction. Since the intermediate elastic body 50 is easily deformed when the vibration is input, the intermediate elastic body 50 is likely to fall outward in the inner cylinder radial direction.

  According to this embodiment, without providing a rubber plate or the like for covering the edge 9a of the outer cylinder 9 separately, that is, while avoiding an increase in cost, the outer cylinder 9 and an external member such as a vehicle body when vibration occurs Can be reliably prevented.

  4 and 5 show a modification of the above embodiment. This modification is mainly opposite to the second bush 20 with respect to the inner cylinder 11 in the X-axis direction (in this example, when attached to the vehicle body, the vehicle longitudinal direction and the connecting rod 30 extending direction). The configuration of the stopper elastic body 15 on the side and the configuration of the elastic stopper portions 60 to 62 provided on the stopper elastic body 15 are different from those in the above embodiment. In the following description, the description of the same part as the above embodiment is omitted.

  The stopper elastic body 15 is formed with a hollow portion 63 penetrating in the direction of the inner cylinder axis. Thus, compared to the case where the stopper elastic body 15 is solid as in the above embodiment, the stopper elastic body 15 Since the thickness in the X-axis direction becomes thin, it becomes easy to elastically deform in the X-axis direction. Thereby, when the vehicle vibrates in the front-rear direction and the up-down direction, the main body elastic body 14 can be displaced more widely in the X-axis direction, so that the vibration isolation function of the main body elastic body 14 can be improved.

  The stopper elastic body 15 is provided with three elastic stopper portions 60 to 62 instead of the elastic stopper portion 42 in the above embodiment on one side in the inner cylinder axis direction. Among them, the pair of elastic stopper portions 60 and 62 are arranged on both sides in the Y-axis direction with respect to the cavity portion 63, and the elastic stopper portion 61 is on the second bush 20 side in the X-axis direction with respect to the cavity portion 63. Has been placed.

The pair of elastic stopper portions 60, 62 are inclined portions 60a, 62a that are inclined toward the outer side in the inner cylinder radial direction toward the outer side in the inner cylinder axial direction at the inner cylinder radial direction inside from the protruding tip. ing. Thereby, the ease with which the elastic stopper parts 60 and 62 fall to the inner cylinder radial direction outside at the time of vibration input is improved.
On the other hand, the elastic stopper portion 61 does not have such an inclined surface and is formed in a rectangular parallelepiped shape extending along the inner cylinder axis direction. This is because the elastic stopper portion 61 in the example of FIG. 4 has a sufficiently small thickness in the X-axis direction, and therefore, when the vibration is input, the inner cylinder 11 outwards from the inner cylinder 11 in the inner cylinder radial direction (mainly the X-axis direction outer side). Since the elastic stopper 61 is deformed by the force acting on the outer cylinder 9 to be deformed outward in the inner cylinder radial direction and part of the edge 9a of the outer cylinder 9 can be covered, it is not necessary to have an inclined surface. is there. However, if the thickness of the elastic stopper portion 61 in the inner cylinder radial direction is not sufficiently thin, the inclined surface as described above may be formed on the elastic stopper portion 61 as necessary.

In the vibration isolator 1 configured as described above, when the outer cylinder 9 is displaced to the X-axis second bush 20 side (left side in FIG. 4) with respect to the inner cylinder 11 at the time of vibration input, for example, Due to the elastic deformation of the main body elastic body 14, the elastic stopper portions 40, 41 provided on the main body elastic body 14 fall down outward in the inner cylinder radial direction and cover a part of the edge 9 a of the outer cylinder 9. After that, the displacement of the outer cylinder 9 with respect to the inner cylinder 11 is such that the stopper elastic body 15 is moved to the outer cylinder 9 (in this example, the inner peripheral side outer cylinder 13 (more in this example) after the stopper elastic body 15 hits the inner cylinder 11. More specifically, the process further proceeds until it hits a thin elastic body portion covering the inner peripheral side outer cylinder 13). Then, due to the elastic deformation of the stopper elastic body 15 during this period, the elastic stopper portions 60 to 62 provided on the stopper elastic body 15 fall to the outside in the inner cylinder radial direction, and a part of the edge 9a of the outer cylinder 9 Cover.
At this time, the elastic stopper portions 40, 41, 60 to 62 are positioned between the end edge 9 a of the outer cylinder 9 and the vehicle body 300, so that interference between the outer cylinder 9 and the vehicle body 300 is prevented.

1, 201: Anti-vibration device, 9, 219: Outer cylinder, 9a, 219a: Edge of outer cylinder, 10, 210: First bush, 11, 211: Inner cylinder, 12: Outer cylinder (outer cylinder) , 13: inner peripheral side outer cylinder (outer cylinder), 14, 214: main body elastic body, 15, 16, 215, 216: stopper elastic body, 17, 18, 63: hollow portion, 20, 220: second bush, 21: 2nd inner cylinder, 22: 2nd outer cylinder, 24: 2nd main body elastic body, 30, 230: Connecting rod, 40-42, 60-62: Elastic stopper part, 40a, 41a, 42a, 60a, 62a : Inclined surface, 43: axial stopper, 50: intermediate elastic body, 300: vehicle body

Claims (4)

An outer cylinder connected to one of the vibration generator and the vibration receiver;
An inner cylinder disposed on the inner peripheral side of the outer cylinder and connected to one of the vibration generating part and the vibration receiving part;
An intermediate elastic body provided between the inner cylinder and the outer cylinder;
The intermediate elastic body is provided on the intermediate elastic body so as to protrude from the intermediate elastic body toward the axially outer side of the inner cylinder, and covers at least a part of the edge of the outer cylinder by deformation of the intermediate elastic body at the time of vibration input. An elastic stopper, which can
Equipped with a,
The intermediate elastic body is
A main body elastic body connecting the inner cylinder and the outer cylinder;
A stopper elastic body independent from the main body elastic body, which is fixed to the outer cylinder and faces the inner cylinder with a hollow portion penetrating in the axial direction of the inner cylinder in the radial direction of the inner cylinder,
Have
The anti-vibration device according to claim 1, wherein the elastic stopper portion is provided on each of the main body elastic body and the stopper elastic body .   The anti-vibration device according to claim 1, wherein the elastic stopper portion has an inclined surface that is inclined toward an outer side in the radial direction of the inner cylinder as it goes toward an outer side in the axial direction of the inner cylinder. The radial distance of the inner cylinder from the inner cylinder to the elastic stopper portion is 1/3 or more of the radial distance of the inner cylinder from the inner cylinder to the outer cylinder. The vibration isolator described in 1. A second outer cylinder connected to the outer cylinder via a connecting rod;
A second inner cylinder disposed on the inner peripheral side of the second outer cylinder;
A second intermediate elastic body provided between the second inner cylinder and the second outer cylinder;
The vibration isolator according to any one of claims 1 to 3 , further comprising: