JP2009115136A - Vibration isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration isolation device capable of applying pre-compression to a rubber elastic body without increasing a cost, and capable of applying sufficient pre-compression by increasing a compression adjustment width. <P>SOLUTION: The vibration isolation device 1 is provided with a cylindrical outer member 2 attached to one of a vibration generating source or a vibration receiving body, an inner member 3 disposed in an inside of the outer member 2 and attached to the other of the vibration generating source or the vibration receiving body, and the rubber elastic body 4 arranged between the outer member 2 and the inner member 2 and elastically connecting the outer member 2 and the inner member 3. The outer member 2 is divided at least into a main body part 21 to which the rubber elastic body is adhered, and a separated part 22 capable of being attached to the main body part 21. A protruded rubber part 42 protruded to the separated body part 22 side is formed on the rubber elastic body 4, and the separated body part 22 is assembled with the main body part 21 in a state that an end surface of the protruded rubber part 42 is pressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vibration isolator used, for example, as an engine mount for a vehicle.

Conventionally, as the vibration isolator, for example, as disclosed in Patent Document 1, an outer cylinder (outer member) press-fitted into a bracket, an inner cylinder (inner member) disposed inside the outer cylinder, A configuration is known that includes a rubber elastic body that is disposed between an inner peripheral surface of an outer cylinder and an outer peripheral surface of the inner cylinder and elastically connects the outer cylinder and the inner cylinder. In the conventional vibration isolator described above, a rubber elastic body is vulcanized between the outer cylinder and the inner cylinder, and then the outer cylinder is reduced by drawing using a drawing die disposed on the outer periphery of the outer cylinder. It is deformed in diameter, pre-compressed to the rubber elastic body, and then the outer cylinder is press-fitted into the bracket. Thereby, generation | occurrence | production of the effect that the generation | occurrence | production of the tensile stress in a rubber elastic body is reduced or prevented and durability improves is acquired.
JP 2000-104775 A

  However, the above-described conventional vibration isolator requires a drawing die or the like for drawing, which increases the cost. Further, in the pre-compression by drawing, there is a case where the rubber elastic body cannot be sufficiently pre-compressed because the compression amount is limited and the compression adjustment width is narrow.

  In the present invention, the above-described conventional problems are taken into consideration, the rubber elastic body can be pre-compressed without cost, and sufficient pre-compression can be applied by increasing the compression adjustment width. It aims at providing the vibration isolator which can do.

A vibration isolator according to the present invention includes a cylindrical outer member attached to any one of a vibration generation source and a vibration receiver, and an inner side of the outer member, and the vibration generation source and the vibration receiver. An anti-vibration device comprising: an inner member attached to any one of the members; and a rubber elastic body that is disposed between the outer member and the inner member and elastically connects the outer member and the inner member. The outer member is divided into at least a main body portion to which the rubber elastic body is bonded and a separate body portion that can be attached to the main body portion. A convex rubber portion projecting toward the body portion side is formed, and the separate body portion is assembled to the main body portion in a state where the tip end surface of the convex rubber portion is pressed.
With such a feature, the rubber elastic body is pre-compressed when the separate body portion is attached to the main body portion. More specifically, when manufacturing the vibration isolator, first, the main body portion and the inner member of the outer member are connected via a rubber elastic body, and a member composed of the main body portion, the inner member and the rubber elastic body is manufactured. Then, the said separate part is assembled | attached to the said main-body part, pressing the separate part of an outer member against the front end surface of the convex rubber part of a rubber elastic body. At this time, the front end surface of the convex rubber part is pressed by the separate part, and the rubber elastic body is pre-compressed.

Moreover, it is preferable that the vibration isolator which concerns on this invention is formed with the recessed part by which the front-end | tip of the said convex rubber part is fitted in the press part of the said separate body part.
Thereby, even if the outer member and the inner member are relatively displaced and the rubber elastic body is deformed, it is difficult for the rubber elastic body to be cut off at the end of the separate body. Further, when the separate body portion is assembled to the main body portion, the separate body portion is positioned by fitting the tip of the convex rubber portion of the rubber elastic body into the concave portion of the separate body portion, so that the fit is improved. Further, the rubber elastic body is prevented from being displaced with respect to the separate body portion.

Further, in the vibration isolator according to the present invention, the rebound side portion of the outer member is constituted by the separate member, and a static load acts on the inner member, whereby the tip surface of the convex rubber portion Is preferably separated from the pressing portion, and the pressing portion serves as a rebound stopper portion that abuts the tip end surface of the convex rubber portion and restricts the displacement of the inner member toward the rebound side.
Thereby, when a static load acts on the inner member, the inner member moves to the bounce side relative to the outer member, and the tip surface of the convex rubber portion is separated from the pressing portion. Thereafter, when the inner member is relatively displaced relative to the outer member on the rebound side, the convex rubber portion of the rubber elastic body comes into contact with the pressing portion of the separate portion, and the relative displacement is restricted.
The above-mentioned "static load" refers to an initial load that acts on the inner member when either the vibration source or the vibration receiver is attached to the inner member, and the above-mentioned "rebound side" Means the direction opposite to the input direction of the static load.

Moreover, it is preferable that the vibration isolator which concerns on this invention fixes the attachment part of the said separate part and the to-be-attached part of the said main-body part by crimping.
Thereby, a separate body part is reliably attached with respect to a main-body part, and precompression is reliably applied with respect to a rubber elastic body.

Further, the vibration isolator according to the present invention has a configuration in which the caulking portion between the separate body portion and the main body portion is configured by bending the plate-like attachment portion and fixing the attachment portion therebetween, in a plan view. It is preferably curved.
Thereby, the relative movement in the axial direction between the separate body portion and the main body portion is restricted, and rattling between the separate body portion and the main body portion is prevented.

In the vibration isolator according to the present invention, either one of the vibration generating source and the vibration receiving body attached to the inner member is brought into contact with the rubber elastic body, and the axial direction of the inner member is reached. It is preferable that an axial stopper portion that restricts the displacement of is formed.
As a result, when the inner member is largely displaced in the axial direction with respect to the outer member, one of the vibration generation source and the vibration receiver attached to the inner member abuts on the axial stopper portion, and Relative displacement is regulated.
Note that “the other of the vibration generating source and the vibration receiver attached to the inner member” includes a vibration generating source such as a bracket (stay) and a member attached to the vibration receiver.

  According to the vibration isolator of the present invention, the rubber elastic body can be pre-compressed without performing the drawing process, so that the cost can be reduced. In addition, since the amount of compression is adjusted by adjusting the protruding length of the convex rubber portion of the rubber elastic body, the compression adjustment width can be easily increased as necessary, which is sufficient for the rubber elastic body. Pre-compression can be applied.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a vibration isolator according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a vibration isolator 1 according to the present embodiment, FIG. 2 is a plan view of the vibration isolator 1, and FIGS. 3 and 4 are cross-sectional views taken along line AA in FIG. FIG. 5 is an exploded view in which a part of the vibration isolator 1 is broken.
FIG. 3 shows the vibration isolator 1 in a state before installation, that is, a state where no static load is applied, and FIG. 4 shows a state after installation, that is, a state where a static load is applied. The device 1 is shown.
Moreover, in this Embodiment, the upper side in FIG. 3, FIG. 4 is a rebound side, and the lower side in FIG. 3, FIG. Further, in the present embodiment, the bound-rebound direction (vertical direction in FIGS. 3 and 4) is the vertical direction, the center axis direction (vertical direction in FIG. 2) of the outer member 2 described later is the axial direction, and the vertical direction The direction (lateral direction in FIGS. 3 and 4) orthogonal to the direction and the axial direction is defined as the left-right direction.

As shown in FIGS. 1 to 3, the vibration isolator 1 in the present embodiment includes an engine (not shown) (corresponding to a vibration generating source in the present invention) and a vehicle body (not shown) in the vibration receiver in the present invention. It is used as an engine mount that is interposed between the engine and the vehicle to attenuate the vibration input from the engine mounted on the vehicle and suppress the vibration transmission to the vehicle body. is there.
The vibration isolator 1 has a cylindrical outer member 2 attached to a vehicle body (not shown) and an inner side of the outer member 2 and is attached to an engine (not shown) via an engine bracket (stay) (not shown). An inner member 3 and a rubber elastic body 4 disposed between the outer member 2 and the inner member 3 are provided.

[Outside member]
The outer member 2 is a cylindrical member that serves as both an outer cylinder and a vehicle body side bracket. The outer member 2 is disposed in a substantially U-shaped main body 21 in a sectional view with the rebound side opened, and an open portion on the upper side of the main body 21. It is divided into a separate body portion 22 attached to the main body portion 21.

  The main body 21 is a metal member formed by pressing a single strip-shaped plate material, and the rubber elastic body 4 is bonded to the inner surface thereof. The main body 21 includes a bound stopper portion 21a provided on the bounce side (upper side) of the inner member 3, a pair of sidewall portions 21b and 21b provided on the left and right sides of the inner member 3, and a pair of sidewall portions. And flange portions 21c and 21c provided at the lower ends of 21b and 21b, respectively.

  The bound stopper portion 21a extends in the left-right direction, and sidewall portions 21b, 21b are erected from both left and right ends of the bound stopper portion 21a. The pair of side wall portions 21b and 21b extend substantially in the vertical direction, and are arranged symmetrically with a space therebetween. The flange portion 21c extends from the upper end of the sidewall portion 21b toward the outside of the pair of sidewall portions 21b, 21b, and extends in the left-right direction. Bolt holes 21d for inserting bolts (not shown) are formed in both end portions in the axial direction of the flange portion 21c. A concave notch 21e is formed in the axial center portion of the flange portion 21c, and a mounted portion 21f to which a mounting portion 22c of a separate body portion 22 to be described later is attached is formed next to the notch 21e. Is formed.

  The separate body portion 22 is a metal member formed by pressing a single strip-shaped plate material, and constitutes a rebound side portion of the outer member 2. The separate body portion 22 is attached to the main body portion 21 in a state in which a distal end surface of a convex rubber portion 42 of the rubber elastic body 4 described later is pressed. If it demonstrates in detail, the separate part 22 will be arrange | positioned so that the open part of the rebound side of the main-body part 21 may be obstruct | occluded. The central portion of the separate body portion 22 in the left-right direction is provided with a convex pressing portion 22a that protrudes toward the inner side (lower side) of the main body portion 21, and is provided on both side portions of the separate body portion 22 in the left-right direction. Are provided with flange portions 22b and 22b which are superposed on the upper surface of the flange portion 21c of the main body portion 21, respectively. The convex pressing portion 22a has a configuration in which a flat plate is bent and deformed into a substantially U shape, and a concave portion 22d (dent) into which a convex rubber portion 42 of a rubber elastic body 4 described later is fitted on the lower surface (tip surface) thereof. Is formed.

  In addition, an attachment portion 22 c that is attached to the attached portion 21 f of the main body portion 21 is provided at the axial center portion of the end portion of the flange portion 22 b of the separate body portion 22. The attaching portion 22c is fixed by caulking to the attached portion 21f. More specifically, the plate-like attachment portion 22c is plastically deformed so as to be bent in a U shape, and the attachment portion 21f is sandwiched and fixed by the attachment portion 22c.

In the example shown in FIG. 2, the caulking portion 23 between the separate body portion 22 and the main body portion 21 has a linear shape extending in the axial direction in plan view, but as shown in FIG. The caulking portion 23 ′ is preferably curved in a plan view. That is, as shown in FIG. 6, the attachment portion 22c ′ is bent and plastically deformed along the attachment portion 21f ′ whose tip has an arc shape, and the attachment portion 21f ′ is sandwiched by the attachment portion 22c ′. Configure to fix. Thereby, the relative movement in the axial direction between the main body portion 21 and the separate body portion 22 is restricted, and rattling in the axial direction between the main body portion 21 and the separate body portion 22 can be prevented.
Further, bolt holes 22e (shown in FIG. 5) communicating with the bolt holes 21d of the main body portion 21 are formed in both end portions in the axial direction of the flange portion 22b of the separate body portion 22, respectively.

[Inner member]
The inner member 3 is a cylindrical metal member extending in the axial direction, and is disposed inside the outer member 2. The engine bracket is mechanically fixed to the inner member 3 by inserting a bolt provided on the engine bracket (not shown) into the inner member 3 and tightening a nut on the bolt protruding from the end of the inner member 3. Is done.

[Rubber elastic body]
The rubber elastic body 4 elastically connects the outer member 2 and the inner member 3, is vulcanized and molded between the outer member 2 and the inner member 3, and has an inner peripheral surface and an inner member of the main body 21. 3 are vulcanized and bonded to the outer peripheral surface. The rubber elastic body 4 includes an inner peripheral covering rubber portion 40 that covers the inner peripheral surface of the main body portion 21 and a pair of support members that extend obliquely from the side wall portions 21b and 21b on both sides toward the inner member 3. The rubber parts 41 and 41 and the convex rubber part 42 protruded toward the rebound side (upward) from the inner member 3 are provided.

  The inner peripheral covering rubber portion 40 is vulcanized and bonded to the inner side surface (upper surface) of the bound stopper portion 21a and the inner side surfaces of the left and right sidewall portions 21b and 21b. Further, the outer peripheral surface of the inner member 3 is covered by the upper portions of the support rubber portions 41 and 41 and the lower portion of the convex rubber portion 42. Further, a substantially horizontal stopper contact surface 40a is formed on the inner peripheral covering rubber portion 40 formed on the upper surface of the bound stopper portion 21a. Moreover, the front end surface of the convex rubber part 42 is formed substantially horizontally and is pressed by the concave part 22d of the pressing part 22a.

  Further, the rubber elastic body 4 is provided with an outer peripheral covering rubber portion 43 that covers the outer peripheral surface of the outer member 2. The outer peripheral covering rubber portion 43 is vulcanized and bonded to the outer side surfaces of the side wall portions 21b and 21b on both the left and right sides and the outer side surface (lower surface) of the bound stopper portion 21a. And a peripheral covering rubber portion 40).

  Further, the rubber elastic body 4 is provided with an engine bracket (not shown) attached to the inner member 3 and an axial stopper portion 44 that abuts an engine and restricts the displacement of the inner member 3 in the axial direction. . Specifically, the axial stopper portion 44 is provided at both axial end portions of the inner peripheral covering rubber portion 40 and the axial stopper portion 44, and includes a plurality of peak portions 44 a protruding along the axial direction. Become.

  Next, the operation of the vibration isolator 1 having the above configuration will be described.

  When manufacturing the vibration isolator 1 described above, as shown in FIG. 5, first, the inner member 3 is disposed inside the main body 21 and the rubber elastic body 4 is vulcanized. The main body 21 and the inner member 3 of the outer member 2 are placed in a mold (not shown) for vulcanization molding of the rubber elastic body 4. At this time, the inner member 3 is disposed inside the main body 21. In addition, an adhesive is applied to the outer peripheral surface of the inner member 3 and the inner and outer peripheral surfaces of the main body 21. Thereafter, vulcanized rubber is poured into the mold to form the rubber elastic body 4. At this time, the inner peripheral covering rubber part 40, the supporting rubber parts 41, 41, the convex rubber part 42, the outer peripheral covering rubber part 43, and the axial stopper part 44 are integrally formed. Then, after the rubber elastic body 4 is solidified, the mold is removed. Thereby, the vibration isolator main body 10 which consists of the main-body part 21, the inner member 3, and the rubber elastic body 4 is produced.

Next, the separate part 22 of the outer member 2 is attached to the main body part 21 of the vibration isolator main body 10 described above. More specifically, first, the separate part 22 is arranged on the rebound side of the vibration isolator main body 10, and the pressing part 22 a of the separate part 22 is brought into contact with the tip surface of the convex rubber part 42 of the rubber elastic body 4. At this time, the tip of the convex rubber portion 42 of the rubber elastic body 4 is fitted inside the concave portion 22d of the separate body portion 22 so that the separate body portion 22 is positioned. Further, a slight gap (about 1 to 5 mm) is provided between the flange portion 21 c of the main body portion 21 and the flange portion 22 b of the separate body portion 22. Subsequently, the pressing portion 22a described above is pressed against the tip surface of the convex rubber portion 42 so that the flange portion 21c of the main body portion 21 and the flange portion 22b of the separate body portion 22 overlap each other, and the mounting portion 22c of the separate body portion 22 is pressed. Is attached to the attached portion 21 f of the main body 21 and the separate body 22 is assembled to the main body 21. Thereby, the front end surface of the convex rubber part 42 is pressed by the separate part 22, and the rubber elastic body 4 is pre-compressed. The pre-compression amount can be adjusted by adjusting the protruding length (diameter direction dimension) of the convex rubber portion 42. For example, in order to increase the pre-compression amount, the protruding length of the convex rubber portion 42 may be increased, and in order to reduce the pre-compression amount, the protruding length of the convex rubber portion 42 may be shortened. In addition, since the attachment portion 22c of the separate body portion 22 is fixed by caulking to the attached portion 21f of the main body portion 21, the separate body portion 22 is unlikely to be detached from the main body portion 21, and the separate body portion 22 is securely attached to the main body portion 21. It is attached.
As described above, the vibration isolator 1 having the above-described configuration is manufactured.

The vibration isolator 1 manufactured as described above is interposed between an engine (not shown) and a vehicle body (not shown).
More specifically, first, the vibration isolator 1 is attached to the vehicle body X. Specifically, the flange portion 21c of the main body portion 21 is placed on the vehicle body, bolts (not shown) are inserted into a plurality of bolt holes 21d formed in the flange portions 21c, 21c, and fastened to the vehicle body.

Next, a bolt portion of an engine bracket attached to an engine (not shown) is inserted into the inner member 3 and tightened with a nut. Thereby, the engine (not shown) is supported via the engine bracket and the vibration isolator 1 and mounted on the vehicle body.
With the vibration isolator 1 installed as described above, vibrations of the engine (not shown) are absorbed by the rubber elastic body 4, and engine vibrations transmitted to the vehicle body (not shown) are reduced.

  When the engine is mounted as described above, a downward static load (bound side) static load is input to the rubber elastic body 4 due to the weight of the engine and the engine bracket. That is, the weight of the engine and the engine bracket (not shown) acts on the support rubber portions 41 and 41 via the inner member 3. As a result, as shown in FIG. 4, the support rubber portions 41, 41 of the rubber elastic body 4 are bent and deformed, and the inner member 3 and the convex rubber portion 42 move downward, and the front end surface (upper end surface) of the convex rubber portion 42 is moved. ) Is separated from the lower surface of the pressing portion 22a. As a result, the pressing portion 22a serves as a rebound stopper portion that restricts the displacement of the inner member 3 toward the rebound side by contacting the tip end surface of the convex rubber portion 42.

  As described above, in a vehicle in which an engine is mounted on the vehicle body via the vibration isolator 1, when the vehicle rides on a step, for example, the vehicle body jumps up and the engine (not shown) is relatively displaced downward relative to the vehicle body ( Then, the rubber elastic body 4 below the inner member 3 (an arch-shaped portion made of the support rubber portions 41, 41) comes into contact with the stopper contact surface 40a of the inner peripheral covering rubber portion 40, and the bound stopper portion 21a The relative displacement of the inner member 3 toward the bound side with respect to the outer member 2 is restricted. At this time, the rubber elastic body 4 below the inner member 3 and the inner peripheral covering rubber portion 40 on the inner side surface of the bound stopper portion 21a serve as a cushioning material to alleviate the impact.

  On the other hand, when the engine (not shown) is relatively displaced (rebounded) upward with respect to the vehicle body X, the front end surface (upper end surface) of the convex rubber portion 42 comes into contact with the pressing portion 22a serving as the rebound stopper portion, and the outer member 2 The relative displacement of the inner member 3 to the rebound side is restricted. At this time, the convex rubber portion 42 acts as a cushioning material to reduce the impact.

  Further, when the engine (not shown) is displaced relative to the vehicle body in the longitudinal direction of the vehicle (axial direction of the vibration isolator 1), for example, when the vehicle suddenly accelerates or decelerates, the engine bracket or engine (not shown) Abutting against the axial stopper 44 of the elastic body 4, the relative displacement of the inner member 3 in the axial direction with respect to the outer member 2 is restricted. At this time, the rubber axial stopper portion 44 acts as a cushioning material, and the impact is alleviated.

  According to the vibration isolator 1 having the above-described configuration, the rubber elastic body 4 can be pre-compressed without performing the drawing process. Therefore, the cost can be reduced as compared with the vibration isolator that pre-compresses by the drawing process. be able to. Further, since the amount of pre-compression can be adjusted by adjusting the protruding length of the convex rubber portion 42 of the rubber elastic body 4, the adjustment range of pre-compression can be easily increased as necessary. Sufficient precompression can be applied to the elastic body 4.

  Further, according to the vibration isolator 1 having the above-described configuration, the recess 22d is formed in the pressing portion 22a, and it is difficult for the rubber elastic body 4 to be cut out at the end of the separate body portion 22. Durability can be improved. Further, when the separate body portion 22 is assembled to the main body portion 21, the positioning is performed by the recess 22d and the fit is good, so that the assembly work of the separate body portion 22 is facilitated, and the productivity can be improved. Furthermore, since the gap between the separate portion 22 and the rubber elastic body 4 is prevented by the recess 22d, vibration damping by the rubber elastic body 4 can be effectively exhibited.

  Moreover, according to the vibration isolator 1 which consists of an above-described structure, when the static load acts on the inner member 3, the front end surface of the convex rubber part 42 separates from the press part 22a, and the press part 22a becomes a rebound stopper part. Therefore, the stopper on the rebound side can be easily formed, and productivity can be improved.

  Further, according to the vibration isolator 1 having the above-described configuration, the attachment portion 22 c of the separate body portion 22 and the attached portion 21 f of the main body portion 21 are caulked and fixed, and the separate body portion 22 is fixed to the main body portion 21. Since it is securely attached to the rubber elastic body 4 and pre-compression is reliably applied to the rubber elastic body 4, it can sufficiently cope with a large displacement and the separate part 22 is detached from the main body part 21. Can be prevented.

  Further, since the axial stopper portion 44 is formed on the rubber elastic body 4 and relative displacement in the axial direction of the inner member 3 with respect to the outer member 2 is restricted, it is necessary to separately provide an axial stopper. Therefore, it is possible to reduce the cost by reducing the number of assembly steps. Further, if an axial stopper is separately provided, rattling occurs in the stopper. However, since the above-described axial stopper portion 44 is integrally formed with the rubber elastic body 4, rattling can be prevented.

  Further, as shown in FIG. 6, when the caulking portion 23 ′ is curved in plan view, the axial backlash between the main body portion 21 and the separate body portion 22 is prevented, so that the vibration characteristics of the vibration isolator 1 can be stabilized. It can be made.

As mentioned above, although the embodiment of the vibration isolator according to the present invention has been described, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist thereof.
For example, in the above-described embodiment, the separate body portion 22 is disposed on the main body portion 21, the outer member 2 is attached to a vehicle body that is a vibration receiver, and the inner member 3 is a vibration generation source. Although it is attached to an engine (not shown) via an engine bracket, in the present invention, the outer member 2 can be attached to a vibration generating source such as an engine, and the inner member 3 can be attached to a vibration receiver such as a vehicle body. More specifically, the vibration isolator 1 is installed upside down from the direction of the embodiment as shown in FIGS. That is, the vibration isolator 1 is arranged in such a direction that the separate part 22 is disposed below the main body part 21, the inner member 3 is attached to the vehicle body (vibration receiver) via the vehicle body bracket, and the outer member 2. An engine (vibration generating source) (not shown) is attached to the flange portions 21c and 22b. Thereby, the outer member 2 is lowered by the weight of the engine or the like, the tip surface of the convex rubber 42 is separated from the pressing portion 22a, and the separate portion 22 becomes a rebound side stopper.

  In the above-described embodiment, the vibration isolator 1 applied as an engine mount of a vehicle is described. The vibration isolator 1 is interposed between an engine (not shown) and a vehicle body. The vibration isolator according to the invention can be applied to other than the engine mount. For example, the vibration isolator according to the present invention can be applied as a mount of a generator mounted on a construction machine, or can be applied as a mount of a machine installed in a factory or the like.

  In the embodiment described above, a bolt of an engine bracket (not shown) is inserted inside the inner member 3 and mechanically fixed with a nut or the like. A configuration in which the press-fitting portion of the engine bracket is press-fitted inside may be employed. Furthermore, the present invention is not limited to the cylindrical inner member 3, and may be an inner member having a configuration in which a bolt protrudes from an end surface of a cylindrical core portion. It may be configured to be attached to.

  Further, in the above-described embodiment, the axial stopper portion 44 is formed on the rubber elastic body 4, but in the present invention, the axial stopper portion 44 can be omitted. For example, the axial stopper can be provided as a separate member.

  In the above-described embodiment, the attachment portion 22c of the separate body portion 22 and the attached portion 21f of the main body portion 21 are caulked and fixed. However, in the present invention, the separate body portion 22 and the main body portion 21 are provided. It may be fixed by other methods. For example, the separate body portion 22 and the main body portion 21 can be fixed with bolts and nuts.

  Moreover, in above-mentioned embodiment, it has the structure which the front end surface of the convex rubber part 42 spaces apart from the press part 22a when a static load acts on the inner member 3, and the press part 22a becomes a rebound stopper part. However, in the present invention, it is possible to adopt a configuration in which the pressing portion 22a is not a rebound stopper portion. For example, even when a static load is applied to the inner member 3, the tip end surface of the convex rubber portion 42 may be kept in contact without being separated from the pressing portion 22 a.

  Moreover, in above-mentioned embodiment, although the part by the side of the rebound of the outer side member 2 is comprised by the separate part 2, this invention is arrange | positioned in parts other than the part by the side of the rebound. Also good. For example, the separate part may be disposed on the side part of the outer member, or the separate part may be disposed on the bound side part.

  In the above-described embodiment, the concave portion 22d is formed on the distal end surface of the pressing portion 22a. However, the present invention can be configured without the concave portion 22d, and the distal end surface of the pressing portion 22a is flat. It may be a simple shape. Moreover, the convex part may be formed in the front end surface of the press part 22a. For example, a configuration in which a plurality of ridges extending in a direction orthogonal to the axial direction (left-right direction) is arranged at intervals may be used.

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

It is a perspective view of the vibration isolator for demonstrating embodiment of this invention. It is a top view of the vibration isolator for demonstrating embodiment of this invention. It is sectional drawing between AA shown in FIG. It is sectional drawing between AA shown in FIG. It is an exploded view of the vibration isolator for demonstrating embodiment of this invention. It is a top view of the vibration isolator for demonstrating other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration isolator 2 Outer member 3 Inner member 4 Rubber elastic body 21 Main body part 21f Attached part 22 Separate part 22a Press part 22c Attaching part 22d Recess 23, 23 'Caulking part 42 Convex rubber part 44 Axial direction stopper part

Claims (6)

A cylindrical outer member attached to any one of the vibration source and the vibration receiver;
An inner member disposed on the inner side of the outer member and attached to either the vibration source or the vibration receiver;
A rubber elastic body disposed between the outer member and the inner member and elastically connecting the outer member and the inner member;
An anti-vibration device comprising:
The outer member is divided into at least a main body portion to which the rubber elastic body is bonded, and a separate body portion that can be attached to the main body portion.
The rubber elastic body is formed with a convex rubber portion protruding toward the separate body portion side,
The vibration isolation device is characterized in that the separate body is assembled to the main body in a state where the tip surface of the convex rubber portion is pressed. The vibration isolator according to claim 1,
The vibration isolator according to claim 1, wherein the pressing portion of the separate portion is formed with a recess into which a tip of the convex rubber portion is fitted. In the vibration isolator according to claim 1 or 2,
A part on the rebound side of the outer member is constituted by the separate part,
When the static load is applied to the inner member, the tip surface of the convex rubber portion is separated from the pressing portion, and the pressing portion is brought into contact with the tip surface of the convex rubber portion to the rebound side of the inner member. Anti-vibration device characterized by being a rebound stopper that regulates the displacement of the lens. In the vibration isolator in any one of Claim 1 to 3,
An anti-vibration device characterized in that the attachment portion of the separate body portion and the attachment portion of the main body portion are fixed by caulking. The vibration isolator according to claim 4,
The caulking portion between the separate body portion and the main body portion has a configuration in which the attachment portion having a plate shape is bent and fixed with the attachment portion interposed therebetween, and is curved in a plan view. apparatus. In the vibration isolator in any one of Claim 1 to 5,
The rubber elastic body has an axial stopper portion that abuts either one of the vibration generation source and the vibration receiver attached to the inner member and restricts displacement of the inner member in the axial direction. An anti-vibration device characterized by being formed.

Images