WO2007058363A1

WO2007058363A1 - Laminate vibration isolating rubber

Info

Publication number: WO2007058363A1
Application number: PCT/JP2006/323246
Authority: WO
Inventors: Hiroo Todoroki; Seiji Tamada; Kiyoshi Ozu; Hiroyuki Yamamoto
Original assignee: Bridgestone Kbg Co., Ltd.; Sharp Corporation
Priority date: 2005-11-21
Filing date: 2006-11-21
Publication date: 2007-05-24
Also published as: JP4514694B2; JP2007139125A

Abstract

A vibration isolating rubber comprising a vibration isolating rubber basic body consisting of annular flat board restriction materials (1) each having an annular outer circumferential edge (1a) defining the outer edge of the vibration isolating rubber, rubber layers (2) laminated to alternate with the restriction materials through vulcanization adhesion, and a central vacant region (6) formed to penetrate the restriction materials (1) and the rubber layers (2), and an annular neck portion (4) having a vacant region continuous to the central vacant region (6) formed at the upper end of the vibration isolating rubber basic body and secured to the vibration source side. The restriction material (1) has the inner edge buried in the rubber layer and the outer edge (1a) substantially aligned with the outer edge (2) of the rubber layer, and a recess (5) is formed in the upper and lower rubber layers (2) at the outer edge (1a) of the restriction material (1).

Description

Specification

Laminated anti-vibration rubber

Technical field

[0001] The present invention relates to a new structure of a vibration-proof rubber, and relates to a laminated vibration-proof rubber having a restraining material incorporated therein.

Background art

[0002] Conventional anti-vibration rubber has been able to cope with many purposes by improving its shape. Such countermeasures have been unable to adequately meet recent social demands. For this reason, the requirement has been addressed by embedding a restraining material in rubber and further combining this with a viscoelastic material (Patent Documents 1 to 3).

Of course, it goes without saying that the former anti-vibration rubber is superior in cost, but such anti-vibration rubber is repeatedly distorted in the vertical direction and, in some cases, in the horizontal direction. Due to repeated repeated strain, the adhesive force at the boundary between the restraint material and the rubber is reduced, resulting in peeling of the part force, and contact between the deformed rubber caused by the strain and other surrounding members. As a result, there was a risk that the rubber would crack.

[0004] Furthermore, when molding anti-vibration rubber, the constraining material set in the mold may interfere with the injected rubber material, and may not reach every corner of the mold. It has occurred. Furthermore, there are some cases where the position where the restraint is set in the mold is uncertain. In the case of the anti-vibration rubber formed by vulcanizing a large amount of rubber, the restraint may be displaced from the predetermined position. Yes.

[0005] Patent Document 1: Japanese Patent Laid-Open No. 05-202636

Patent Document 2: Japanese Patent Application Laid-Open No. 2004-36648

Patent Document 3: Japanese Patent Laid-Open No. 08-210437

Disclosure of the invention

Problems to be solved by the invention

[0006] The present invention relates to an anti-vibration rubber in which the former restraining material is embedded in rubber, and in particular, supports a compressor leg of a refrigerator or an air conditioner, a Stirling engine, and a linear drive compressor. The purpose of the present invention is to provide a technology that eliminates the disadvantages of the laminated vibration-proof rubber embedded with the restraining material as described above.

Means for solving the problem

[0007] The first gist of the present invention is an annular flat plate binding material in which an annular outer peripheral edge defines an outer edge of a vibration-proof rubber, and a rubber layer that is alternately laminated on the binding material by vulcanization adhesion. An anti-vibration rubber base comprising a central air region formed through the restraining material and the rubber layer, and an annular fixed to the vibration source side having an air region continuous with the central air region at an upper end of the anti-vibration rubber base. An anti-vibration rubber having a neck portion, wherein the inner edge of the restraining material is embedded in the rubber layer, and the outer edge of the restraining material substantially coincides with the outer edge of the rubber layer, and above and below the outer edge of the restraining material. Laminated rubber anti-vibration rubber in which a depression is formed in the rubber layer, and preferably the outer diameter (ΦΝ) of the rubber layer sandwiched between the restraining materials is equal to the outer diameter (ΦΑ) of the restraining material or the like. It depends on.

[0008] And more specifically, if the inner diameter (ΦΕ) of the restraint material, the inner diameter of the central airspace (ΦΒ), the inner diameter of the neck airspace (ΦΚ), and the outer diameter of the neck airspace (F), ΦΕ> ΦΡ≥ ΦΒ> ΦΚ (Claim 3) A laminated anti-vibration rubber.

[0009] The second gist of the present invention uses a mold that defines the outer shape of the laminated anti-vibration rubber specified in claims 1 to 7, and a mold in which the center of the laminated anti-vibration rubber is divided into two in the vertical direction. Then, a restraint material is sandwiched between the circumferential ridges forming the depressions, the mold is closed, cavities are formed on the upper and lower sides and the inner edge side of the restraint material, and the rubber material is supplied from the injection port formed in the annular neck portion of the laminated vibration-proof rubber Injecting, filling the cavity on the inner edge side of the restraint material with rubber material, filling the cavity material between the upper and lower sides of the restraint material, then vulcanizing the powerful rubber material and placing it in the mold The present invention relates to a method for producing a laminated anti-vibration rubber, which is obtained by further demolding.

The invention's effect

[0010] The first aspect of the present invention is a laminated anti-vibration rubber having the configuration as described above, and particularly has high durability with reduced horizontal panel constants while ensuring vertical support rigidity. Anti-vibration rubber, which is suitable for use in, for example, a compressor having a strong vibration force in the horizontal direction. Is. And it is set as the structure excellent also in productivity.

Brief Description of Drawings

FIG. 1 is a perspective view of a laminated anti-vibration rubber according to the present invention.

FIG. 2 is a front view of the anti-vibration rubber shown in FIG.

FIG. 3 is a side view of the vibration isolating rubber shown in FIG.

[FIG. 4] FIG. 4 is a bottom view of the anti-vibration rubber shown in FIG.

FIG. 5 is a central cross-sectional view of the vibration-proof rubber shown in FIG.

FIG. 6 is a side view of the inner surface of a mold for producing the vibration-proof rubber of the present invention.

[FIG. 7] FIG. 7 is a side view of a core that forms a cavity in combination with a mold. BEST MODE FOR CARRYING OUT THE INVENTION

[0012] The first laminated anti-vibration rubber of the present invention is an anti-vibration rubber in which the horizontal panel constant is reduced while securing the vertical support rigidity. Needless to say, it provides anti-vibration rubber that provides sufficient anti-vibration effect even in the horizontal direction. Usually, the adhesion interface between the restraining material and the rubber does not peel off. Force to be generated We provide anti-vibration rubber with countermeasures against this peeling phenomenon.

[0013] The restraining material is most preferably a metal material in order to achieve a force-specific effect that can use metal, ceramics, plastics, and the like. The restraint material may be a flat and annular restraint material.

[0014] As the rubber material to be laminated, various vulcanized rubbers or rubber-like elastic bodies are used. Examples of rubber include EPM, EPDM, NBR, IIR, CIIR, CR, NR, IR, SBR, and BR.

[0015] It is possible to coat the outer surface portion with a rubber material having excellent weather resistance for the purpose of improving weather resistance and the like. For example, IIR, U, EPM, EPDM can be used as the coating rubber material. , CSM, CM, CR, etc.

[0016] These rubber materials may be used alone, in combination of two or more, or may be blended with other commercially available rubber materials. These rubber materials are mixed with various fillers such as anti-aging agents, plasticizers, softeners and oils.

[0017] The laminated anti-vibration rubber according to the first aspect of the present invention secures the supporting rigidity in the vertical direction. Therefore, it is a highly durable anti-vibration rubber with a reduced panel constant in the horizontal direction, and has a structure with excellent productivity. Therefore, the inner edge of the restraining material is embedded in the rubber layer, the outer edge of the restraining material substantially coincides with the outer edge of the rubber layer, and the depressions are formed in the rubber layers above and below the outer edge of the restraining material. It is. This achieves the purpose of reducing the horizontal panel constant while ensuring the vertical support rigidity, and the adhesive interface between the restraining material and the rubber layer is peeled even if the force is repeatedly strained. The durability is extremely improved. That is, even when a large strain is applied in the horizontal direction, the rubber at the bonding interface is not pulled, and the strain can be always dealt with with a margin corresponding to the depression of the rubber layer. Of course, the formation of this recess makes it possible to widen the linear region as a vibration-proof rubber. This depression of the rubber layer also plays a major role in the manufacture of vibration-proof rubber, and this will be described later.

[0018] More specifically, if the outer diameter of the restraint material (ΦΑ) and the outer diameter of the rubber layer sandwiched between the restraint materials (ΦΑ), then ΦΝ≥ΦΝ, Even when a load is applied in the direction, the outer edge of the rubber layer sandwiched between the restraining materials will not protrude beyond the outer edge of the restraining material. Durability in this respect that cannot be repeated is improved.

[0019] The relationship between the inner diameter (ΦΕ) of the restraint material and the inner diameter (ΦΒ) of the central airspace is such that ΦΕ> ΦΒ, which means that the inner edge of the restraint material is buried in the rubber layer To do. The presence of this rubber layer makes it possible to control the panel characteristics in the horizontal and vertical directions. The rubber layer on the inside of the restraint material plays a major role in the manufacture of the vibration isolating rubber, and this point will be described later.

[0020] The relationship between the inner diameter (ΦΒ) of the central airspace and the inner diameter (ΦΚ) of the neck airspace is such that ΦΒ> ΦΚ, so that the pressure receiving portion D in the vertical direction can be widened.

[0021] The relationship between the inner diameter (ΦΕ) of the restraint material and the outer diameter (F) of the neck is such that ΦΕ> ΦΡ, so that the entire surface of the restraint material can be adapted to a vertical load. .

[0022] The interrelationship between the inner diameter of the restraint (ΦΕ), the inner diameter of the central airspace (ΦΒ), the inner diameter of the neck airspace (ΦΚ), and the outer diameter of the neck (F) is ΦΕ>ΦΡ≥ΦΒ> ΦΦ ΦΦ is the same as F A little smaller is better.

[0023] The relationship between the outer diameter of the restraint (ΦΑ) and the inner diameter of the central airspace (ΦΒ) is ΦΑΖΦΒ = 1.2 to 1.

In this range where 6 is preferred, a large buckling limit strain can be obtained and a low panel constant can be obtained.

[0024] The method for producing a laminated anti-vibration rubber according to the second aspect of the present invention is to set a restraining material at a predetermined position in a mold that defines the outer shape of the laminated anti-vibration rubber, and in this state, the rubber material is poured and added. The method of sulfuration is optimal. However, in order to form a recess (circumferential groove) in the rubber layer, the peripheral groove is formed by forming the peripheral protrusion at a predetermined position in the mold, and the restraining material is interposed between the peripheral protrusions. For this reason, when the arrangement of the restraining material in the laminated anti-vibration rubber becomes accurate, it also has the characteristics.

[0025] According to a preferable manufacturing method of the present invention, a mold in which the center of the laminated anti-vibration rubber is divided into two in the vertical direction is used, and the restraining material is sandwiched between the peripheral protrusions in the mold as described above. However, the molten rubber material is poured into the mold cavity and molded. The injection port of the rubber material is the neck, and the space between the constraining materials is ΦΕ-ΦΒ. The rubber flows down and is filled. In other words, the portion constituting the rubber layer on the inner side of the restraint material becomes a path for the rubber to flow down, so that the rubber is completely filled between the restraint materials. Then, it is obtained by vulcanizing a powerful rubber material and removing it from the mold.

[0026] [Example]

Hereinafter, the present invention will be described in more detail with reference to the drawings. 1 is a perspective view of a laminated anti-vibration rubber according to the present invention, FIG. 2 is a front view, FIG. 3 is a side view, and FIG. 4 is a bottom view. In the figure, 1 is a metal restraint material, 2 is a rubber layer sandwiched between restraint materials 1, 3 is an upper and lower rubber layer of restraint material 1, and 4 is an annular neck. The outer edge la of the constraining material 1 substantially coincides with the outer edge of the rubber layer 3, and a depression (circumferential groove) 5 is formed with the outer edge la sandwiched between the upper and lower rubber layers 2 and 3 of the outer edge la of the constraining material 1, and the restraint The outer edge 2 a of the rubber layer 2 sandwiched between the materials 1 is formed so as to recede inward from the outer edge la of the restraint material 1. The rubber layers 2 and 3 are made of NR rubber, and the restraint material 1 and the rubber layers 2 and 3 are vulcanized and integrated in a mold.

FIG. 5 is a central sectional view. In the figure, 6 is the central airspace, 7 is the central airspace of the annular neck 4, and 8 is the It is a tom part, and a hole 8a is formed here. ΦΑ is the outer diameter of restraint material 1, ΦΕ is the inner diameter of restraint material 1, ΦΝ is the outer diameter of rubber layer 2 sandwiched between restraint materials 1, ΦΒ is the inner diameter of central airspace 6, and ΦK is the airspace of neck 4 The inner diameter, F, indicates the outer diameter of the neck 4. G indicates the width of the restraint 1 and D indicates the width of the pressure receiving portion 9. The central airspace 6 and the airspace 4a of the neck 4 are connected with a tapered surface.

[0028] Speaking of the actual dimensions of a strong laminated anti-vibration rubber, ΦΑ is 24mm, ΦΕ is 18mm, ΦΝ is 5mm, ΦΒ is 15mm, ΦΚ is 13mm, and F is 17mm. The height H of the anti-vibration rubber is 28.2mm, the height of the neck 4 is 4.2mm, the height of the rubber layer 2 is 5mm, the rubber layer 3 is 5.5mm, the height of the bottom 8 is 3mm, the hole The inner diameter of 8a was 10mm, and the thickness of restraint 1 was lmm. Further, the outer edge 2a of the rubber layer 2 is formed 0.5 mm inside the outer edge la of the restraint material 1, and the recess 5 has a width of 1 mm and a depth of 1.5 mm. The width G of the constraining material is 3 mm, and the width of the pressure receiving part D is 4 mm.

[0029] The target spring constant of the laminated anti-vibration rubber obtained here was 4NZmm in the horizontal direction and 25NZmm in the vertical (compression) direction. This target value was completely cleared.

[0030] Further, regarding the durability of the obtained laminated anti-vibration rubber, since the recesses 5 are formed in the rubber layers 2 and 3 in contact with the restraint material 1, the rubber layers 2 and 3 are particularly large even during horizontal vibration. The tension no longer works, which greatly reduces the phenomenon of delamination between the restraining material and the rubber, and the fact that the durability has been greatly improved has become a component.

FIG. 6 is an inner side view showing one side of the mold 11 used in the second of the present invention.

Of course, the inner surface of the mold is engraved with a shape that defines the outer shape of the first laminated anti-vibration rubber of the present invention. In particular, a constraining material is used to form depressions (circumferential grooves) 5 above and below the constraining material. A pair of circumferential ridges 12 and 13 are engraved on each. Therefore, the restraining material 1 is sandwiched between the circumferential protrusions 12 and 13, and the rubber material is injected into the cavity in this state. For example, reference numeral 14 denotes a rubber injection port provided at the neck, and the injected rubber material flows down into the cavity inside the restraint material 1 and flows into each part.

Note that reference numeral 21 shown in FIG. 7 denotes a core, which has a surface that defines the inner surface of the laminated anti-vibration rubber, and also constitutes a cavity through which the rubber material flows down. Needless to say, a pair of molds 11 and 11 is combined with the core 21 to form a complete mold. Is.

Industrial applicability

The present invention is as described above, and is a highly durable laminated anti-vibration rubber in which the panel constant in the horizontal direction is reduced while securing the vertical support rigidity, and can be widely used as an anti-vibration rubber. In particular, it is particularly suitable for a Stirling engine having a strong vibration force in the horizontal direction and a linear drive compressor.

Claims

The scope of the claims

[1] An annular flat plate restraining material in which an annular outer peripheral edge defines an outer edge of the vibration isolating rubber, a rubber layer that is alternately laminated on the restraining material by vulcanization adhesion, and the restraint material and the rubber layer are penetrated. An anti-vibration rubber base comprising: an anti-vibration rubber base comprising: an anti-vibration rubber base having an annular neck fixed to the vibration source side and having an air space connected to the central air-space at the upper end of the anti-vibration rubber base; The inner edge of the restraint material is embedded in the rubber layer, the outer edge of the restraint material substantially coincides with the outer edge of the rubber layer, and the depressions are formed in the rubber layers above and below the outer edge of the restraint material. A laminated anti-vibration rubber characterized by this.

[2] The laminated anti-vibration rubber according to claim 1, wherein the outer diameter of the restraining material (ΦΑ) and the outer diameter of the rubber layer sandwiched between the restraining materials (ΦΝ) are ΦΑ≥ΦΝ.

[3] The laminate according to claim 1, wherein the inner diameter (ΦΕ) of the restraint material, the inner diameter of the central airspace (ΦΒ), the inner diameter of the neck airspace (ΦΚ), and the outer diameter of the neck, ΦΕ> F≥ΦΒ> ΦΚ Anti-vibration rubber.

[4] The laminated anti-vibration rubber according to claim 1, wherein ΦΑ / ΦΒ = 1.2 to 1.6.

5. The laminated vibration-proof rubber according to claim 1, wherein the restraining material is a metal material.

[6] The mold that defines the outer shape of the laminated anti-vibration rubber specified in claim 1 is a mold in which the center of the laminated anti-vibration rubber is divided into two in the vertical direction, and is constrained between the circumferential ridges that form the depressions. The material is sandwiched and the mold is closed to form cavities on the upper and lower and inner edges of the restraint material. The rubber material is injected from the injection port formed in the annular neck of the laminated anti-vibration rubber. It was obtained by filling the cavity with rubber material while filling the cavity between the upper and lower parts of the restraint material, then vulcanizing the powerful rubber material and removing it from the mold. A process for producing laminated anti-vibration rubber.

[7] The method for producing a laminated anti-vibration rubber according to claim 6, wherein ΦΑ≥Φ すると, where the outer diameter of the restraining material (ΦΑ) and the outer diameter of the rubber layer sandwiched between the restraining materials (ΦΝ).

[8] The laminate according to claim 6, wherein the inner diameter (ΦΕ) of the restraint material, the inner diameter of the central airspace (ΦΒ), the inner diameter of the neck airspace (ΦΚ), and the outer diameter of the neck, ΦΕ> F≥ΦΒ> ΦΚ Anti-vibration rubber manufacturing method.

[9] The method for producing a laminated anti-vibration rubber according to claim 6, wherein ΦΑΖΦΒ = 1.2 to 1.6.

[10] The method for producing a laminated vibration-proof rubber according to claim 6, wherein the restraining material is a metal material.