JP2007309451A - Vibration isolating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration isolating device including a chain connecting flange plates to each other, rationally improved so that a means for stopping the oscillation of a chain in compression to avoid an abnormal sound or cracks is mounted not to cause disadvantage in non-compression. <P>SOLUTION: This vibration isolating device includes: a pair of flange plates 1, 2 formed of rigid plates; a vibration isolating body 10 integrally interposed between the flange plates 1, 2; and a connecting means R connecting the flange plates 1, 2 to each other in a state of storing the flange plates 1, 2 in the vibration isolating body 10 to be regulated from moving in the direction of separating from each other, wherein the vibration isolating body 10 is constituted as a layered product formed by alternately stacking a hard plate 3 and an elastic layer 4. The vibration isolating body 10 has a through hole 5 penetrating in the stacking direction of the layered product, a rubber pipe 7 is fitted in and disposed in the through hole 5, and the chain 8 constituting the connecting means R is stored and disposed in the rubber pipe 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vibration isolator used mainly for suspension devices such as off-road trucks and construction machines, such as a large truck used in a mining site of a mine.

  Conventionally, as this type of vibration isolator, those disclosed in Patent Document 1 and Patent Document 2 are known. That is, a hollow vibration-proof body made of rubber or elastomer is disposed between a metal upper flange and a lower flange, and a link chain that connects a plurality of links is provided in the hollow portion of the vibration-proof body. And a vibration isolator having a structure in which the link at the upper end of the link chain is held by the link holding portion provided on the upper flange, and the link at the lower end of the link chain is held by the link holding portion provided on the lower flange. .

  Such a vibration isolator is designed so that the vibration isolating function is exhibited mainly when receiving a compressive load, and should be used in a place that meets such design conditions. However, in off-road truck suspension systems, etc., a tensile load may act on the vibration isolator, so the upper and lower flanges are connected internally to prevent the vibration isolator body from being damaged. A chain is provided as connecting means.

  The vibration isolator is used in such a manner that a vibration isolator is interposed between the engine and the vehicle body frame to support the engine on the vehicle body, or between the swing arm and the vehicle body frame in the rear wheel suspension device. In general, there is a situation in which either one is a fixed or almost fixed member and one of the other is a movable member, such as a vibration isolator interposed between the two. There is also a method of using a vibration isolator between members.

Such a vibration isolator is in a state where the chain is tensioned in a free state before being assembled to an actual vehicle, but in many cases, a compression load is applied in a mounted state on an off-road truck or a construction machine. Therefore, the chain (intermediate chain link) is in a free state.
JP-T-2002-527700 U.S. Pat. No. 4,615,513

  Therefore, when the chain swings due to running vibration or the like, there is a problem that abnormal noise is generated due to contact with the end face of the hard plate of the laminated body. Further, as shown in FIG. 4, the rubber layer 34 of the laminate H between the upper and lower flange plates 31, 32 is formed in the hole 35 because of the rust prevention of the hard plate 33 made of a steel plate or the like and the molding convenience of the rubber layer 34. In the case of assuming a vibration isolator (comparative example) A having an internal rubber part 36 covering the inner peripheral surface, a crack occurs in the internal rubber part 36 due to a collision with the chain 38, and the crack progresses to the rubber layer 34. There is also a possibility that it may peel off from the hard plate 33. Therefore, the movement of the chain 38 during compression, which causes abnormal noise and cracks, becomes a problem, and it is actually necessary to take some measures.

  An object of the present invention is to provide a vibration isolator having a chain accommodated in an anti-vibration main body as a connecting means across the flange plates, and to prevent the steadying means of the chain during compression so as to avoid abnormal noise and cracking. The object is to provide a reasonably improved vibration isolator that is equipped while avoiding inconvenience during compression.

The invention according to claim 1 includes a pair of flange plates 1 and 2 made of a rigid plate, a vibration isolating body 10 that is integrally interposed between the flange plates 1 and 2, and the flange plates 1 and 2. And connecting means R for connecting the flange plates 1 and 2 while being accommodated in the vibration isolating body 10 so as to restrict movement in directions away from each other. In the vibration isolator configured in a laminated body in which the elastic layers 4 are alternately laminated,
The vibration isolating body 10 is formed with a through hole 5 penetrating in the laminating direction of the laminate, and a tubular member 7 made of an elastic material is fitted and disposed in the through hole 5 and the chain 8 constituting the connecting means R is formed. Is accommodated in the tubular member 7.

The invention according to claim 2 is the vibration isolator according to claim 1, wherein the chain 8 includes a first chain link 8A screwed to one of the pair of flange plates 1 and 2; The second chain link 8B supported by the other two of the pair of flange plates 1 and 2 by the hooking and locking mechanism 9 and one or more intermediates connecting the first chain link 8A and the second chain link 8B. Chain link 8C,
The hook locking mechanism 9 is integrated with the link body 15 in a state having a diameter larger than the maximum width dimension of the link body 15 to which the intermediate chain link 8C in the second chain link 8B is connected. The flange portion 16 includes a through hole 17 formed in the other flange plate 2 in a state that allows passage of the link main body 15 and the flange portion 16 has a diameter incapable of passing, and By passing the first chain link 8A, the intermediate chain link 8C, and the link main body 15 through the through-hole 17 so as to be inserted into the vibration isolating main body 10, the flange portion 16 penetrates the other flange plate 2 through the through hole 17. It is configured to be able to be hooked on the peripheral portion 17b of the hole 17.

  The invention according to claim 3 is the vibration isolator according to claim 1 or 2, wherein the tubular member 7 is tightly fitted or press-fitted into the punched hole 5, and / or the chain 8 is the tubular member. 7 has a structure that is tightly fitted or press-fitted into 7.

  According to a fourth aspect of the present invention, in the vibration isolator according to any one of the first to third aspects, the tubular member 7 is formed of a composite material having a reinforcing fiber 7B on an elastic material 7A. It is a feature.

  According to a fifth aspect of the present invention, in the vibration isolator according to any one of the first to fourth aspects, the punch hole 5 has a circular shape when viewed in the stacking direction, and the tubular member 7 has a cylindrical shape. It is formed in the thing made from rubber to exhibit.

  According to invention of Claim 1, the tubular member is interposed between the chain accommodated in the punched hole of the laminate and the laminate, and there is no annular space between the laminate and the chain, Since there is almost no gap, there is no space for the chain to swing, and the chain swing itself is suppressed or eliminated. Therefore, even when the anti-vibration device is compressed and the chain is loosened and played, the chain will be prevented from coming into contact with the inner rubber part, and the inner rubber part will crack, or the crack will progress to the rubber layer. Or the fact that it causes the separation of the hard plate and the rubber layer is eliminated, and the swinging movement of the chain itself is greatly suppressed or avoided. Therefore, even when the laminate has a structure that does not have the inner rubber portion, the collision between the chain and the inner end surface of the hard plate is eliminated, and no abnormal noise is generated by the collision. Since the tubular member is made of an elastic material, the slackened chain can be moved laterally while elastically deforming the tubular member because the vibration isolator is compressed. There is no inconvenience even if the gap between the body (space for moving the chain) is eliminated.

  As a result, in the vibration isolator having a chain accommodated in the vibration isolating body as a connecting means across the flange plates, the chain steadying means at the time of compression in order to avoid the occurrence of abnormal noise and cracks, A reasonably improved vibration isolator can be provided which is equipped while avoiding inconvenience.

  According to the invention of claim 2, although described in detail in the section of the embodiment, it is possible to freely attach and detach the chain and the tubular member through the through hole formed in the other flange plate. Therefore, it is possible to provide a convenient anti-vibration device that can easily replace the chain and the tubular member and perform maintenance. If the tubular member and the laminate or the chain are tightly fitted or press-fitted as in claim 3, the swing movement regulation of the tubular member or chain is strengthened, and the tubular member is As a composite member made of an elastic member containing reinforcing fibers, the material can be a tubular member with improved rigidity. Further, as in claim 5, if a cylindrical tubular member made of rubber is disposed in a circular hole as viewed in the stacking direction, claims 1-4 regardless of the relative posture between the chain and the tubular member. Thus, it is possible to provide a non-directional vibration isolator capable of exhibiting any one of the above effects.

  Embodiments of a vibration isolator according to the present invention will be described below with reference to the drawings. 1 is a cross-sectional view showing the structure of a vibration isolator according to Embodiment 1, FIG. 2 is a plan view of the vibration isolator of FIG. 1, and FIG. 3 is a partially cutaway view showing another structure of a rubber pipe built in a laminate. A side view and FIG. 4 are sectional views of a vibration isolator of a comparative example.

[Example 1]
As shown in FIGS. 1 and 2, the vibration isolator A according to the first embodiment includes a pair of upper and lower flange plates 1 and 2 made of a thick metal plate (an example of a rigid plate), and between the flange plates 1 and 2. The upper and lower flange plates 1 and 2 are accommodated in the anti-vibration main body 10 so as to restrict the movement of the anti-vibration main body 10 and the upper and lower flange plates 1 and 2 in a direction away from each other. The anti-vibration rubber comprises connecting means R for connecting the two.

  The anti-vibration main body 10 is configured as a laminated body in which a large number of hard plates 3 and rubber layers (an example of an elastic layer) 4 made of steel plates are alternately laminated, and a circular shape having an axis P in plan view. A hollow portion (opening hole) 5 that penetrates in the vertical direction (an example of the stacking direction) and has a circular shape in plan view (bottom view) is formed at the center so as to form an annular shape. Each rubber layer 4 is integrally formed with an inner rubber portion 6 that extends to the inner diameter side and covers the inner peripheral end of each hard plate 3. The rubber layers 4 and 4 at the upper and lower end portions are vulcanized and bonded to the upper and lower flange plates 1 and 2, whereby the upper and lower flange plates 1 and 2 and the laminate (vibration-proof body) 10 are integrated. Has been.

  A tubular member made of rubber (an example of an elastic material), that is, a rubber pipe 7 is fitted and disposed in the hollow portion 5 of the laminated body 10, and a chain 8 constituting the connecting means R is accommodated and disposed in the rubber pipe 7. Is arranged in. The chain 8 includes an upper flange plate (an example of “one of a pair of flange plates”) 1 and a lower chain plate (an example of “the other of a pair of flange plates”). 2) the second chain link 8B supported by the hooking and locking mechanism 9 and one (or two or more) intermediate chain links 8C connecting the first chain link 8A and the second chain link 8B. It consists of and.

  The first chain link 8 </ b> A includes a loop-shaped link main body 11 connected to the intermediate chain link 8 </ b> C, a flange portion 12, and a bolt portion 13. In order to fix the first chain link 8 </ b> A to the upper flange plate 1, the bolt portion 13 is passed through the insertion hole 1 a formed through the center portion of the upper flange plate 1 from the bottom upward, This is done by tightening the upper flange plate 1 with the nut 14 and the flange portion 12 to be screwed together. The intermediate chain link 8C is configured in an elliptical loop shape that is long in the vertical direction.

  The second chain link 8B includes a loop-shaped link body 15 connected to the intermediate chain link 8C and a large-diameter flange portion 16. A step hole 17 is formed through the central portion of the lower flange plate 2, and the large diameter flange portion 16 is fitted into a large diameter hole portion 17 a on the lower side of the step hole 17 so that an annular step surface (“through hole” An example of a peripheral portion of the hook) is configured to have a hook locking mechanism 9 for hooking and locking the second chain link 8B to the lower flange plate 2 in a state of preventing the second chain link 8B from coming off (downward). Has been.

  That is, the hook locking mechanism 9 is a flange portion integrated with the link body 15 in a state having a diameter larger than the maximum width dimension of the link body 15 to which the intermediate chain link 8C in the second chain link 8B is coupled. 16 and the through-hole 17 formed in the lower flange plate 2 in a state where the passage of the link body 15 is allowed and the flange portion 16 has a diameter incapable of passage, and the first chain link 8A and the middle By passing through the through hole 17 so that the chain link 8C and the link main body 15 are inserted into the laminated body 10, the flange portion 16 is configured to be hooked on the peripheral portion 17b of the through hole 17 in the lower flange plate 2. ing.

  Therefore, if the nut 14 is removed from the bolt part 13, the vibration isolating chain 8 built in the laminated body 10 is taken out from the through hole 17 of the lower flange plate 2 or is inserted into the laminated body 10 from the outside. It has become free. By the way, the dimension of the maximum width W of the intermediate chain link 8C is equal to the maximum width of the link body 11 of the first chain link 8A and the maximum width of the link body 15 of the second chain link 8B. Each of the maximum widths 11 and 15 may be a value that can pass through the through hole 17, and the magnitude relationship is not limited.

  1 and 2, the rubber pipe 7 has an outer diameter ro slightly smaller than the diameter (inner diameter) D of the hollow portion 5 of the laminate 10 (ro <D), and an inner diameter ri of the chain 8. Of the intermediate chain link 8C is slightly larger than the width dimension W (ri> W), and the length d is slightly shorter than the length L in the free state of the hollow portion 5 of the laminate 10. It is formed in the cylindrical thing set to (d <L), respectively. In FIG. 1, the rubber pipe 7 is depicted as being in a state of being radially offset in the hollow portion 5. The diameter D of the hollow portion 5 is the same as the diameter of the small diameter hole portion 17 c in the through hole 17 of the lower flange plate 2, and the rubber pipe 7 can be freely inserted into and removed from the laminated body 10 using the through hole 17. Yes. Therefore, the rubber pipe 7 can be replaced or maintained through the through hole 17 due to deterioration over time or the like.

  Although not shown in the drawing, the inner diameter ri of the rubber pipe 7 is set to a diameter dimension that is tightly fitted or press-fitted into the intermediate chain link 8C (ri = W, ri> W), or the outer diameter ro of the rubber pipe 7 is set. The diameter may be set (ro = W, ro> W) to be tightly fitted or press-fitted into the hollow portion 5 of the laminate 10. The length d of the rubber pipe 7 may be the same as the height L of the hollow portion 5, and when the laminate 10 is pre-compressed, it is desirable to match the height of the hollow portion 5 after the pre-compression. Further, the material of the tubular member 7 may be other than rubber such as fluororesin or EPDM, and may be made of an elastic material.

  In the vibration isolator A of the first embodiment, the rubber pipe 7 is disposed in the annular space between the laminated body 10 and the chain 8 so that there is almost no gap. Therefore, the vibration isolator A is compressed and the chain 8 is compressed. Even when the chain 8 is slack and playing, the swinging movement of the chain 8 is greatly suppressed or avoided, and the chain 8 comes into contact with the inner rubber part 6 (including shocking contact (collision)). It is eliminated that the inner rubber part 6 is cracked or that the crack progresses to the rubber layer 4.

  Further, in the vibration isolator A having the laminated body 10 having the structure without the inner rubber portion 6, there is also an advantage that the noise due to the collision between the chain 8 and the end face of the hard plate 3 is not generated. Even if the rubber pipe 7 is damaged by the chain 8, the rubber pipe 7 is separate from the laminated body 10, so that there is no problem in the laminated body 10 and only the rubber pipe 7 can be replaced. Furthermore, although the spring constant of the laminated body 10 tends to be lower than that of the structure without the hollow part 5 due to the presence of the hollow part 5, it is possible to reduce the decrease in the spring constant by the arrangement of the rubber pipe 7. There are advantages.

[Another Example]
As shown in FIG. 3, the tubular member 7 may be made of a composite material having reinforcing fibers 7B in an elastic material 7A. For example, various materials such as a material in which a fiber used for a tire cord or the like is put in rubber or a glass fiber in a synthetic resin material having elasticity are possible. Since the tubular member 7 having the reinforcing fibers 7B has higher rigidity than the case without the reinforcing fibers 7B, advantages such as improved shape retention and improved durability can be obtained.

Sectional drawing which shows structure of vibration isolator (Example 1) Plan view of the vibration isolator of FIG. Side view of a partially cut-out showing another structure of the tubular member Sectional drawing which shows the vibration isolator of a comparative example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flange plate 2 Flange plate 3 Hard plate 4 Elastic layer 5 Punching hole 6 Internal rubber part 7 Tubular member 7A Elastic material 7B Reinforcing fiber 8 Chain 8A First chain link 8B Second chain link 8C Intermediate chain link 9 DESCRIPTION OF SYMBOLS 10 Anti-vibration main body 15 Link main body 16 Flange part 17 Through-hole 17b Surrounding part A Anti-vibration tool R Connection means

Claims (5)

A pair of flange plates made of rigid plates, an anti-vibration main body integrally interposed between the flange plates, and the anti-vibration main body are accommodated in the anti-vibration main body so as to restrict movement of the flange plates in a direction away from each other. A vibration isolator having a coupling means for coupling the flange plates in a state, and the vibration isolating body is configured in a laminate formed by alternately laminating hard plates and elastic layers,
In the vibration-proof body, a hole that penetrates in the stacking direction of the laminate is formed, and a tubular member made of an elastic material is fitted into the hole and the chain constituting the connecting means is accommodated in the tubular member. Anti-vibration device being placed. The chain includes a first chain link that is screwed to one of the pair of flange plates, a second chain link that is supported on the other of the pair of flange plates by a hook and lock mechanism, and these It is composed of one or more intermediate chain links connecting the first chain link and the second chain link,
The hook locking mechanism includes a flange portion integrated with the link body in a state having a diameter larger than a maximum width dimension of a link body to which the intermediate chain link is connected in the second chain link, The link body is allowed to pass, and the flange portion has a through hole formed in the other flange plate in a state where the flange portion has a diameter that cannot pass, and the first chain link and the intermediate chain link, The flange portion is configured to be hookable on a peripheral portion of the through hole in the other flange plate by passing the through hole so as to insert the link main body into the vibration isolating main body. Item 1. The vibration isolator according to item 1.   The vibration isolator according to claim 1 or 2, wherein the tubular member has a configuration in which the tubular member is tightly fitted or press-fitted into the punched hole, and / or the chain is tightly fitted in or pressed into the tubular member. .   The said tubular member is a vibration isolator as described in any one of Claims 1-3 currently formed with the composite material which has a reinforcement fiber in an elastic material. The vibration isolator according to any one of claims 1 to 4, wherein the punched hole has a circular shape when viewed in the stacking direction, and the tubular member is formed of rubber having a cylindrical shape.

Images