JP2006226435A - Rubber cushion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber cushion capable of preventing the deformation and damage of an upper flange and a lower flange and a link retention part caused by large compression even if impact energy is applied on a rubber cushion body. <P>SOLUTION: The hollow rubber cushion body 4 is integrated between the metal upper and lower flanges 2, 3 by a vulcanization adhesion means or the like. A link chain 7 connecting a plurality of links 5, 6... is provided in a hollow part of the rubber cushion body 4. The link 5 of one end of the link chain 7 is bendably retained by a link retention part 9 fixed on the upper flange 2 and the link 5 of another end is retained so as to be bendable by a link retention part 8 fixed on the lower flange 3, and adjoining links 5, 6 are connected so as to be bendable. The dimension G of a gap between the link chain 7 and the inner surface of the rubber cushion body 4 is set to a dimension preventing the links 5, 6 from abutting on the inner surface of the rubber cushion body 4 even if the links 5, 6 bend. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an anti-vibration rubber suitably used for a vehicle suspension device such as an off-road truck.

  Conventionally, as this type of anti-vibration rubber, for example, as shown in FIGS. 6 to 8, a hollow anti-vibration rubber main body 23 made of an elastomer material is disposed between a metal upper flange 21 and a lower flange 22, A link chain 27 in which a plurality of links 24, 25, 26 are connected in the hollow of the vibration-proof rubber body 23 is provided, and the link 24 at one end of the link chain 27 is attached to the link holding portion 28 provided on the upper flange 21. Some of the links 26 at the other end are respectively held by link holding portions 29 provided on the lower flange 22 (see Patent Document 1). According to this, during normal use, the compression load is supported by the anti-vibration rubber main body 23, and when a tensile load is applied, the anti-vibration rubber main body 23 is less likely to receive the tensile load by the link chain 27. The main body 23 can be protected from damage.

JP-T-2002-527700

  However, the anti-vibration rubber is provided with three links, ie, upper and lower end links 24 and 26 and a center link 25, in order to make it difficult to receive a tensile load. Of these, the upper end link 24 is provided on the link holding portion 28 of the upper flange 21. On the other hand, it is held in a semi-fixed state where it cannot be refracted (refer to the description of paragraph No. [0031], FIG. 1 and FIG. 3 in the above-mentioned Patent Document 1), and the lower end link 26 also holds the link of the lower flange 22. Since the portion 29 is held in a semi-fixed state incapable of refraction (see the paragraph numbers [0032], [0033], FIG. 1 and FIG. 2 in the same publication), the center link 25 is connected to the upper end link 24. And it is in a state where it cannot be refracted with respect to the lower end link 26. That is, as shown in FIGS. 6 and 7, the link holding portion 28 of the upper flange 21 is integrally formed on the inner surface of the upper flange 21 so as to protrude opposite to each other. Or a holding pin 28c passed between the pin receiving projecting walls 28a and 28b, and the upper end link 24 is a within the groove 30 between the pin receiving projecting walls 28a and 28b. The upper end link 24 is held in a semi-fixed state in which it cannot be bent with respect to the link holding portion 28 of the upper flange 21. . As shown in FIGS. 6 and 8, the link holding portion 29 of the lower flange 22 has cross-shaped groove portions 31a and 31b formed inside the frustoconical portion 22a protruding inwardly at the center of the lower flange 22. The buffer member 32 is arranged, the half link 33 is fitted into one groove 31 a of the buffer member 32, and the lower end link 26 extends in the b direction within the other groove 31 b of the buffer member 32 by the half link 33. The lower end link 26 is also held in a semi-fixed state where it cannot be bent with respect to the link holding portion 29 of the lower flange 22.

  When the upper and lower end links 24 and 26 are both held in a semi-fixed state as described above, the center link 25 is not refracted with respect to the upper and lower end links 24 and 26 when receiving a compressive load in the vertical direction, and the upper flange When the collision occurs in the link holding portion 28 of the link 21 and the link holding portion 29 of the lower flange 22 and the collision is repeated, a temporary and sudden large compressive load is applied particularly when the vehicle bounces. The anti-vibration rubber main body 23 is greatly compressed, but the central link 25 collides with the upper and lower link holding portions 28 and 29 by this compression, so that the upper and lower flanges 21 and 22 and the link holding portions 28 and 29 are deformed or damaged. There was a problem of generating abnormal noise.

  The present invention has been made to solve such problems, and in the above-described anti-vibration rubber, a method for attaching the link chain to the link holding portion of the both ends of the link chain and a way of connecting the links are devised. The purpose is to provide an anti-vibration rubber that can prevent deformation and breakage of the upper and lower flanges and the link holding part due to a large load even when impact energy is applied to the anti-vibration rubber body by stiffening. To do.

  The anti-vibration rubber of the present invention has a hollow anti-vibration rubber main body integrated between a metal upper flange and a lower flange, and a link chain in which a plurality of links are connected in the hollow of the anti-vibration rubber main body. In the anti-vibration rubber provided, the link chain at one end of the link chain is held by the link holding part fixed to the upper flange, and the link at the other end is held by the link holding part fixed to the lower flange. The link chain is composed of at least two or more links, the links at both ends are held in a refractive manner with respect to the link holding portion, and adjacent links are connected in a refractive manner with each other. The gap between the vibration rubber main body and the inner surface of the vibration isolating rubber body is set to a dimension that prevents the link from coming into contact with the inner surface of the vibration isolating rubber main body due to refraction of the link. Those having features and.

  In this case, it is preferable that at least the inner periphery of the link is covered with rubber.

  According to the anti-vibration rubber having the above configuration, the links at both ends of the link chain made up of at least two links are held to be refractable with respect to the link holding portions of the upper and lower flanges, and adjacent links can be refracted from each other. Therefore, when a heavy load is applied to the anti-vibration rubber body and the anti-vibration rubber body compresses greatly, the links are refracted in the hollow of the anti-vibration rubber body so that the links are vertically flanged and link holding parts. Can be prevented from being deformed or damaged in the upper and lower flanges and the link holding part. In addition, the gap between the link chain and the inner surface of the anti-vibration rubber body is set so that the link does not come into contact with the inner surface of the anti-vibration rubber body due to the refraction of the link. it can.

  By covering at least the inner periphery of the link of the link chain with rubber, it is possible to prevent damage or abnormal noise due to contact between the links.

A preferred embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of an anti-vibration rubber showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the anti-vibration rubber. 1 and 2, an anti-vibration rubber 1 according to the present invention includes a metal upper flange 2, a metal lower flange 3 disposed opposite to the lower surface side of the upper flange 2, and upper and lower flanges 2, 3. A hollow anti-vibration rubber main body 4 integrated by a vulcanizing adhesive means or the like is provided therebetween. In the hollow of the anti-vibration rubber body 4, a link chain 7 connecting two or more circular or elliptical links 5, 6... Is provided, and the link 5 at one end of the link chain 7. Is held by the link holding part 8 fixed to the upper flange 2, and the link 6 at the other end is held by the link holding part 9 fixed to the lower flange 3.

  The link holding portion 8 fixed to the upper flange 2 has a circular annular portion 8a. The annular portion 8a protrudes inward of the upper flange 2, and the link holding portion 9 fixed to the lower flange 3 is provided. Has a circular annular portion 9 a, and this annular portion 9 a protrudes inward of the lower flange 3. The link 5 at one end and the link 6 at the other end of the link chain 7 can be tilted in the longitudinal and lateral directions with respect to the annular portions 8a and 9a of the upper and lower link holding portions 8 and 9, respectively (appropriate play). Is inserted and held so that it can be refracted freely. Adjacent links 5 and 6 are connected so that they can be freely refracted by setting appropriate play between the links 5 and 6. Further, the gap dimension G between the link chain 7 and the inner surface of the anti-vibration rubber body 4 is such that the links 5 and 6 do not contact the inner surface of the anti-vibration rubber body 4 even when the links 5 and 6 are refracted. It is set.

  The anti-vibration rubber 1 configured as described above is supported by the anti-vibration rubber body 4 during normal use, and when the tensile load is applied, the anti-vibration rubber body 4 is pulled by the link chain 7 when the tensile load is applied. The anti-vibration rubber body 4 can be protected from damage by making it less susceptible to damage. In particular, even when a sudden and sudden large load is applied to the anti-vibration rubber main body 4 and the anti-vibration rubber main body 4 is greatly compressed when the vehicle bounces, the link to the link holding portion 8 of the upper flange 2 is linked. 5 and the links 6 are refracted with respect to the link holding portion 9 of the lower flange 3, or the links 5, 6 are refracted, so that the upper and lower flanges 2, 3 and the link holding portions 8, 9 and the link 5 are refracted. , 6 can be avoided, so that the upper and lower flanges 2, 3 and the link holding portions 8, 9 can be protected from deformation and damage. Further, since the links 5 and 6 do not come into contact with the inner surface of the anti-vibration rubber main body 4 due to the refraction of the links 5 and 6, damage to the anti-vibration rubber main body 4 can be prevented.

  3 and 4 show another embodiment. The anti-vibration rubber 1 of this embodiment is formed in a quadrangular shape instead of forming the annular portions 8a and 9a of the link holding portions 8 and 9 of the upper and lower flanges 2 and 3 in a circular shape. The above-described links 5, 6... Are configured in the same manner as in the case of the anti-vibration rubber 1 of the above embodiment, except that the links 5, 6. In this way, the upper and lower link holding portions 8 and 9 and the links 5, 6... Are formed in a square shape, and then the link 5 is connected to the link holding portion 8 of the upper flange 2 and the link holding portion of the lower flange 3. In the above embodiment, the links 6 are respectively held with a play that is movable in the horizontal direction with respect to 9, and adjacent links 5 and 6 are connected with a play that can be relatively moved in the horizontal direction. In addition to the effect of preventing deformation and breakage of the obtained upper and lower flanges 2 and 3 and link holding portions 8 and 9 and preventing damage to the vibration isolating rubber main body 4, the link chain 7 is sufficient for large shear deformation of the vibration isolating rubber main body 4. It has the advantage that it can be made to follow.

  As shown in FIG. 5, the anti-vibration rubber body 4 itself has a laminated rubber structure in which rubber layers 4a and steel plates 4b are alternately laminated and vulcanized as in the embodiment shown in FIGS. Alternatively, it may be configured as a single hollow rubber block, or instead of a single inclined rubber block, it may be configured as a single hollow vertical rubber block.

  As shown in FIG. 5, covering only the inner periphery of each link 5, 6, or covering the inner periphery and the outer periphery with rubber 10 can prevent abnormal noise and damage when the links 5, 6 come into contact with each other. This is preferable. In addition, you may coat | cover the rubber | gum 10 also on the inner periphery or outer periphery of the cyclic | annular parts 8a and 9a of the link holding | maintenance parts 8 and 9 as needed.

It is a top view of the vibration isolator which shows one Example of this invention. It is a longitudinal cross-sectional view of the vibration-proof rubber of FIG. It is a top view of the vibration isolator which shows another Example. It is a longitudinal cross-sectional view of the vibration-proof rubber of FIG. It is a longitudinal cross-sectional view of the vibration-proof rubber which shows other Example. It is a half notched longitudinal cross-sectional view of a conventional anti-vibration rubber. FIG. 7 is an end view of the anti-vibration rubber in FIG. 6 in the direction of arrow X in FIG. 6. FIG. 7 is an end view of the anti-vibration rubber in FIG. 6 in the direction of arrow Y in FIG. 6.

Explanation of symbols

1 Anti-vibration rubber 2 Upper flange 3 Lower flange 4 Anti-vibration rubber body 5, 6 Link 7 Link chain 8, 9 Link holding part 10 Rubber G Gap dimension

Claims (2)

A hollow anti-vibration rubber body is integrated between a metal upper flange and a lower flange, and a link chain in which a plurality of links are connected in the hollow of the anti-vibration rubber body is provided. One end of the link chain In the anti-vibration rubber in which the link is held by the link holding part fixed to the upper flange and the link at the other end is held by the link holding part fixed to the lower flange,
The link chain is composed of at least two or more links, the links at both ends are held in a refractive manner with respect to the link holding portion, and adjacent links are connected in a refractive manner with each other, and the link chain and the link An anti-vibration rubber characterized in that a gap between the anti-vibration rubber main body and the inner surface of the anti-vibration rubber main body is set such that the link does not contact the inner surface of the anti-vibration rubber main body due to refraction of the link. The anti-vibration rubber according to claim 1, wherein at least an inner periphery of the link is covered with rubber.

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