Vibration isolation components

Abstract

The technical challenge is to develop a novel vibration-damping component that possesses high load-bearing capacity and vibration isolation against vibration loads from the main compression direction, while also exhibiting vibration isolation against vibration loads from directions other than the compression direction. [Solution] The vibration isolation member 1 of the present invention comprises a base 2 fixed to the vibrating base B, a mounting base 3 fixed to the supported body W, a load vibration isolation body 4 that connects and fixes the base 2 and the mounting base 3 so that they face each other and cushions and supports the load of the supported body W, and a viscoelastic vibration isolation body 5 fixed and bonded to both the base 2 and the mounting base 3. At least one of the base 2 and the mounting base 3 is provided with a fixing projection 6 in the direction in which the base 2 and the mounting base 3 face each other, and the fixing projection 6 is fixed and bonded to the viscoelastic vibration isolation body 5 in an inserted state, and the load vibration isolation body 4 is composed of a spring element.

Description

[Technical Field]

[0001] This invention relates to a vibration-damping member for mounting a bearing to a vibrating substrate in a vibrating environment, by reducing or avoiding vibrations. [Background technology]

[0002] Precision measuring instruments and precision machining equipment installed in environments with high vibration levels are mounted on the equipment to be installed via cushioning or vibration-damping materials. Suitable materials for this purpose include cushioning materials such as silicone gel, and various vibration-damping components incorporating these materials are available on the market. Such vibration-damping components often support relatively lightweight equipment materials in terms of their permissible load. When supporting relatively heavy objects with a permissible load of several tens of kgf, it tends to be difficult to obtain the desired interference performance.

[0003] To address this issue, vibration-damping members have been proposed that have a structure in which a cushioning material such as silicone gel and a spring element act in parallel. For example, Patent Document 1 (Japanese Utility Model Publication No. 63-133656) proposes a vibration-damping support device comprising a base that is fixed to a support surface, a support for placing an article, a self-shape-maintaining outer casing made of an elastic material that is enclosed at the top and bottom by the base and the support, a plurality of spring elements housed inside the outer casing and sandwiched between the base and the support, and a gel-like substance that is filled so as to be compressed between the base and the support at least during operation. Furthermore, according to Patent Document 1, while exhibiting a vibration damping effect through the deformation and restoration of the gel-like material, the elasticity of the spring element sets the basic resistance force of the vibration isolation support device, receiving a substantial portion of the static pressure of the object, reducing the burden on the gel-like material and improving vibration isolation characteristics.

[0004] On the other hand, in actual vibration isolation environments, vibration loads can occur not only from the main compression direction (bearing load direction), but also from directions other than the compression direction due to changes in the center of gravity of the supported body, and in recent years there has been a growing demand for improved vibration isolation against such vibration loads. However, in response to this requirement, a structure that simply uses a cushioning material such as silicone gel and a spring element in parallel, as in the vibration isolation support device of Patent Document 1, had room for improvement in terms of vibration isolation performance against vibration loads from directions different from the compression direction. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Utility Model Publication No. 63-133656 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] This invention was made in consideration of the above background, and its technical objective is to develop a novel vibration-damping member that has high load-bearing capacity and vibration damping properties against vibration loads from the main compression direction, while also exhibiting vibration damping properties against vibration loads from directions other than the compression direction. [Means for solving the problem]

[0007] In other words, the vibration-damping member described in claim 1 is A vibration-damping member for mounting a bearing body to a vibrating base in a vibrating environment, which reduces or avoids vibrations. This vibration-damping component is A base that is fixed to the vibrating substrate, A mounting base fixed to the supported body, A load-shielding vibration damper connects and fixes the base and mounting base so that they face each other, thereby cushioning and supporting the load of the supported body. It comprises a viscoelastic vibration damper that is fixedly bonded to both the base and the mounting base, At least one of the base base and the mounting base is provided with a fixing projection in the direction in which the base base and the mounting base face each other, and the fixing projection is fixed and bonded to the viscoelastic vibration damper in an inserted state. Furthermore, the load-dissipating vibration damper is characterized by being composed of spring elements.

[0008] Furthermore, the vibration-damping member described in claim 2, in addition to the requirements described in claim 1, The aforementioned load-dissipating vibration damper is characterized by being a compression coil spring.

[0009] Furthermore, the vibration-damping member described in claim 3, in addition to the requirements described in claim 1 or 2, The base is characterized by comprising a cylindrical retaining frame facing the mounting base side, which is equipped with the fixing protrusions, and a viscoelastic vibration damper provided within this retaining frame.

[0010] Furthermore, the vibration-damping member described in claim 4, in addition to the requirements described in claim 1 or 2, The mounting base is characterized by comprising a cylindrical retaining frame that extends toward the base side and is equipped with the fixing protrusions, and a viscoelastic vibration damper provided within this retaining frame.

[0011] Furthermore, the vibration-damping member described in claim 5, in addition to the requirements described in claim 1 or 2, The aforementioned fixing projection is characterized in that the diameter of the free end side, which is inserted into the viscoelastic vibration damper, is formed in a tapered shape with a gradually decreasing diameter.

[0012] Furthermore, the vibration-damping member described in claim 6, in addition to the requirements described in claim 1 or 2, The aforementioned fixing protrusions are characterized by being divided in the compression direction of the load-bearing vibration-damping body and being provided in multiple portions.

[0013] Furthermore, the vibration-damping member described in claim 7, in addition to the requirements described in claim 3, The aforementioned retaining frame is characterized by being divided in the compression direction of the load-bearing vibration-damping body.

[0014] Moreover, the vibration isolator according to claim 8, in addition to the requirements described in claim 1 or 2, the fixing protrusion is provided in an inserted state penetrating the viscoelastic vibration isolator, and is characterized in that.

[0015] Moreover, the vibration isolator according to claim 9, in addition to the requirements described in claim 1, the load vibration isolator is a tension coil spring or a diaphragm spring, and is characterized in that.

[0016] Moreover, the vibration isolator according to claim 10, in addition to the requirements described in claim 1 or 2, the viscoelastic vibration isolator has a complex elastic modulus of 1×10 5 MPa or more and a loss tangent of 0.2 or more, and is characterized in that.

[0017] Moreover, the vibration isolator according to claim 11, in addition to the requirements described in claim 10, the viscoelastic vibration isolator is an aryl-modified silicone resin composition, and is characterized in that.

[0018] Moreover, the vibration isolator according to claim 12, in addition to the requirements described in claim 1 or 2, the fixing protrusion fixedly adhered in an inserted state within the viscoelastic vibration isolator is formed separately from the base base or the mounting base, and is arranged spaced apart from the base base or the mounting base, when a vibration load is input to the vibration isolator, until the base base or the mounting base abuts against the fixing protrusion, only the load vibration isolator compresses to buffer and support the supported body, while after the base base or the mounting base abuts against the fixing protrusion, along with the compression of the load vibration isolator, the viscoelastic vibration isolator also deforms to buffer and support the supported body, and is characterized in that it has such a configuration.

[0019] Moreover, the vibration isolator according to claim 13, in addition to the requirements described in claim 1 or 2, The aforementioned fixing projection comprises a first fixing projection formed separately from the base and a second fixing projection formed separately from the mounting base. Of these, the first fixing projection is fixed and bonded with one end inserted into the first viscoelastic vibration damper which is fixed and bonded to the base, and is positioned so that the other end faces the direction of the mounting base, and the second fixing projection is fixed and bonded with one end inserted into the second viscoelastic vibration damper which is fixed and bonded to the mounting base, and is positioned so that the other end faces the direction of the base. Furthermore, the first and second fixing protrusions are spaced apart from each other when no vibration load is applied to the vibration-damping member, and are arranged so that at least a portion of them can come into contact with each other when a vibration load is applied to the vibration-damping member. When a vibration load is applied to the vibration isolation member, until the first and second fixing protrusions come into contact, only the load-bearing vibration isolation body compresses, cushioning and supporting the supported body. The first fixed projection and the second fixed projection come into contact, and as the load-bearing vibration-damping body is compressed, the first viscoelastic vibration-damping body and the second viscoelastic vibration-damping body deform, respectively, to cushion and support the supported body. The aforementioned problems are then solved by the means described in each of these claims. [Effects of the Invention]

[0020] First, according to the invention described in claim 1, a load-bearing vibration damper is provided that cushions and supports the load of the supported body, thus providing a vibration damping member that exhibits high load-bearing capacity. Furthermore, since a fixing projection is provided on at least one of the base or the mounting base, and this fixing projection is fixed and bonded to the viscoelastic vibration damper (a viscoelastic vibration damper fixed and bonded to both the base and the mounting base), a vibration damping member is obtained that exhibits vibration damping even against vibration loads from directions different from the compression direction of the load vibration damper.

[0021] Furthermore, according to the invention described in claim 2, since the load-damping vibration isolation body that cushions and supports the load of the supported body is composed of a compression coil spring, the vibration isolation member can be configured simply.

[0022] Furthermore, according to the invention described in claim 3 or 4, the base or mounting base is provided with a cylindrical retaining frame, and a viscoelastic vibration damper is provided within this retaining frame. Therefore, when a vibration load is applied to the viscoelastic vibration damper, vibration damping is obtained by controlling the deformation state of the viscoelastic vibration damper with the retaining frame.

[0023] Furthermore, according to the invention described in claim 5, the fixed projection is formed in a tapered shape, with its diameter gradually decreasing toward the free end side where it is inserted into the viscoelastic vibration damper. This angle (taper angle) allows for vibration damping that controls the deformation state of the viscoelastic vibration damper when a vibration load is applied.

[0024] Furthermore, according to the invention described in claim 6, since multiple fixing protrusions are provided so as to divide the load vibration damper in the compression direction, a different vibration damping performance can be obtained compared to, for example, when the fixing protrusions are formed in a cylindrical or cylindrical shape.

[0025] Furthermore, according to the invention described in claim 7, since the retaining frame of the base is formed to be divided in the compression direction of the load vibration damper, a different vibration damping performance can be obtained compared to, for example, the case in which the retaining frame is continuously formed in a cylindrical shape.

[0026] Furthermore, according to the invention described in claim 8, since the fixing projection is provided so as to penetrate the viscoelastic vibration damper, a different vibration damping performance can be obtained compared to, for example, the case in which the tip of the fixing projection is embedded and fixed inside the viscoelastic vibration damper.

[0027] Furthermore, according to the invention described in claim 9, since the load-damping vibration isolation body that cushions and supports the load of the supported body is composed of a tension coil spring or a diaphragm spring, a different vibration isolation performance can be obtained compared to when the load-damping vibration isolation body is composed of a compression coil spring.

[0028] Furthermore, according to the invention described in claim 10, the viscoelastic vibration damper has a complex modulus of 1 × 10⁻⁶. 5 Since the loss tangent is 0.2 or more at MPa or higher, a vibration-damping member that better supports vibration damping and high load resistance can be obtained.

[0029] Furthermore, according to the invention described in claim 11, since the viscoelastic vibration damper is composed of an aryl-modified silicone resin composition, the complex modulus of elasticity is 1 × 10⁻⁶. 5 With a loss tangent of 0.2 or more at MPa or higher, low compressive strain, and excellent temperature stability, high load-bearing capacity and long-term stable vibration isolation are achieved.

[0030] Furthermore, according to the invention described in claim 12, for example, until a vibration load is applied to the vibration-damping member and the mounting base comes into contact with the fixed projection, the load-bearing vibration-damping member alone provides cushioning and support to the supported body. However, once the mounting base comes into contact with the fixed projection, the viscoelastic vibration-damping member deforms along with the compression of the load-bearing vibration-damping member, thereby providing cushioning and vibration-damping performance in two stages.

[0031] Furthermore, according to the invention described in claim 13, for example, when a vibration load is applied to the vibration-damping member, the load-bearing body alone provides cushioning and support until the first and second fixed protrusions, which were initially positioned opposite each other and spaced apart, come into contact. After the fixed protrusions come into contact with each other, the first viscoelastic vibration-damping body and the second viscoelastic vibration-damping body deform individually along with the compression of the load-bearing vibration-damping body, thereby providing cushioning and vibration-damping capabilities in a more diverse manner in two or three stages. [Brief explanation of the drawing]

[0032] [Figure 1] This is a longitudinal cross-sectional view showing Examples 1 to 3 of the vibration-damping member according to the present invention. [Figure 2] The above diagram shows an explanatory diagram illustrating Examples 4 to 6. [Figure 3] The same as above, this is a longitudinal cross-sectional view showing Examples 7 to 9. [Figure 4] The same as above, this is a longitudinal cross-sectional view showing Examples 10 and 11. [Figure 5] The same as above, this is a longitudinal cross-sectional view showing Examples 12 and 13. [Figure 6] These are longitudinal cross-sectional views (a) to (h), mainly showing various examples of modifications to the viscoelastic vibration damper compared to Example 6. [Figure 7] These are vertical cross-sectional views (a) and (b) that mainly show two examples of modifications to the retaining frame compared to Example 6. [Figure 8] These are longitudinal cross-sectional views (a) to (c) that mainly show various examples of modifications to the fixing protrusions compared to Example 6. [Figure 9] These are longitudinal cross-sectional views (a) to (c) that mainly show various modified examples in which the mounting method of the fixing protrusions to the viscoelastic vibration damper is changed, in Example 6. [Modes for carrying out the invention]

[0033] The present invention is as shown in the following embodiments, but is not limited to these embodiments, and modifications can be made to these embodiments as appropriate within the scope of the technical idea of ​​the present invention. [Examples]

[0034] The vibration-damping member 1 of the present invention will be described in detail below based on the illustrated embodiment. The vibration-damping member 1 is a member that reduces or avoids vibrations in a vibrating base B that is in a vibrating environment, and supports the supported body W. Here, the vibrating base B in a vibrating environment is, for example, construction machinery where vibration is unavoidable during operation, or a deck-like support structure installed on the track bed of a railway vehicle. On the other hand, the supported body W is a precision measuring instrument, a work machine, or a control device for them that is supported by the vibration-damping member 1. Many embodiments of the vibration-damping member 1 have been devised, as shown in the following Examples 1 to 11, but we will first explain the common members that encompass their configurations.

[0035] The vibration isolation member 1 comprises a base 2 fixed to the vibrating base B, a mounting base 3 fixed to the supported body W, a load vibration isolation body 4 that connects and fixes the base 2 and mounting base 3 so that they face each other and cushions and supports the load of the supported body W, and a viscoelastic vibration isolation body 5 fixed and bonded to both the base 2 and the mounting base 3. Furthermore, at least one of the base 2 and the mounting base 3 is provided with a fixing projection 6 in the direction in which the base 2 and the mounting base 3 face each other, and the fixing projection 6 is fixed and bonded to the viscoelastic vibration isolation body 5 in an inserted state. Here, "provided with a fixing projection 6 in the direction in which the base 2 and the mounting base 3 face each other" means that the insertion portion of the fixing projection 6 is facing in that direction. Furthermore, this viscoelastic vibration damper 5 has a complex modulus of elasticity of 1 × 10⁻⁶. 5 The load-dissipating vibration damper 4 is made of a viscoelastic material with a loss tangent of 0.2 or more at a pressure of MPa or higher, and is composed of spring elements such as compression coil springs.

[0036] Here, the complex modulus, also called the dynamic modulus, is the sum of the storage modulus and the loss modulus. The storage modulus corresponds to the dynamic modulus derived from elasticity, and the loss modulus corresponds to the dynamic modulus derived from viscosity. The loss tangent is the ratio of the loss modulus to the storage modulus, and the larger the loss tangent, the higher the vibration damping. The complex modulus and loss tangent of the viscoelastic vibration damper 5 are measured in accordance with JIS K 7224-10, "Plastics - Test methods for dynamic mechanical properties - Part 10: Complex shear viscosity by parallel plate vibration rheometer". Specifically, the material constituting the viscoelastic vibration damper 5 (cured or solidified product) is molded into a disc shape (test specimen) with a diameter of 8 mm and a thickness of 2 mm, and this test specimen is measured using a dynamic viscoelasticity measuring device under conditions of 25°C and 1 Hz.

[0037] The base 2 and mounting base 3 constituting the vibration isolation member 1 have sufficient rigidity to either not deform or to bend to a degree that does not affect the vibration isolation characteristics of the vibration isolation member 1 when the load-bearing vibration isolation body 4 and viscoelastic vibration isolation body 5 are compressed and deformed by vibrations and loads applied from the vibrating base B side or the bearing body W side. Metal materials or resin materials with excellent mechanical strength can be applied individually or in combination. Examples of metal materials include iron, tin, nickel, aluminum, magnesium, etc., or alloys thereof. Examples of resin materials with excellent mechanical strength include polyacetal, polycarbonate, polyamide, polyetheretherketone, polyphenylene sulfide, and various fiber-reinforced plastics. The materials constituting the base 2 and mounting base 3 are appropriately selected according to the load and stress when using the vibration isolation member 1.

[0038] Furthermore, the load-bearing vibration damper 4, which constitutes the vibration-damping member 1, is a component that primarily contributes to the high load-bearing capacity of the vibration-damping member 1 by connecting and fixing the base 2 and the mounting base 3 so that they face each other, thereby cushioning and supporting the load of the supported body W. Since the load-bearing vibration isolation body 4 has the characteristic of requiring a large force to achieve the same amount of deformation as the viscoelastic vibration isolation body 5, it can support the load of the supported body W up to a load range that the viscoelastic vibration isolation body 5 cannot support, thereby greatly improving the high load-bearing capacity of the vibration isolation member 1. The load-bearing vibration damper 4 is a spring element capable of exhibiting the above-mentioned effects, and can be a compression coil spring, a tension coil spring 4A, a diaphragm spring 4B, or other springs.

[0039] The basic configuration of the vibration-damping member 1 of the present invention is as described above, and it works as follows to reduce or avoid the transmission of vibrations to the heavily loaded bearing W. First, when vibrations are transmitted from the vibrating base B to the base 2, these vibrations are transmitted to the bearing W on the mounting base 3 with some of the vibration energy absorbed by the load vibration damper 4. However, the load vibration damper 4 itself does not have an active damping effect, i.e., a damping effect, so the vibrations are gradually attenuated. On the other hand, at this time, the mounting base 3 is fixed in a state where the fixing projection 6 is inserted into the viscoelastic vibration damper 5, so the vibrations transmitted through the load vibration damper 4 are effectively attenuated and absorbed by the viscoelastic vibration damper 5, and the bearing W is stably supported.

[0040] Incidentally, the viscoelastic vibration damper 5 has a complex modulus of elasticity of 1 × 10⁻¹⁰ from the perspective of high load resistance. 5 It is preferable that the pressure is MPa or higher. This provides a vibration-damping member 1 that better supports both vibration damping and high load resistance. Furthermore, in a configuration where the base 2, viscoelastic vibration damper 5, and mounting base 3 are directly superimposed in the order commonly used in the past, the damping effect against weak vibrations becomes somewhat sluggish, and the desired vibration damping performance cannot be obtained. Therefore, from the viewpoint of vibration damping performance that dampens these vibrations, it is effective to have a material property that also possesses a loss tangent of 0.2 or higher.

[0041] Furthermore, the viscoelastic vibration damper 5 is preferably a cured product of the above-mentioned highly elastic and high-damping silicone resin composition, and is particularly preferably a cured product of an aryl-modified silicone resin composition. Specifically, it is a cured product obtained by crosslinking a block copolymer, which consists of diorganosiloxane units and trifunctional arylsiloxane units and whose molecular ends are sealed with alkenyl groups, with an organopolysiloxane having reactive groups that can be added to the alkenyl groups.

[0042] The cured product of the aryl-modified silicone resin composition is, more specifically, (A) The following formula (1): [ka] A siloxane block (a) represented by the following formula (2): [wherein R is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms that does not contain an aliphatic unsaturated group, and n is an integer from 3 to 150] and the following formula (2): [ka] [In the formula, R 1 It is represented by the average unit formula of (b) a siloxane block (b) having 3 to 150 silicon atoms, and the following formula (3): [ka] [In the formula, R 2 R is an alkenyl group, 3 An organopolysiloxane block copolymer in which at least a portion of the molecular ends are sealed by a unit represented by [where does not contain an aliphatic unsaturated group and represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms], (B) A crosslinked cured product with an organohydrogenpolysiloxane having an average of two or more hydrogen atoms bonded to silicon atoms in each molecule. The siloxane block (a) in the organopolysiloxane block copolymer (A) constituting this cured product acts to impart elasticity to the cured product obtained from this silicone resin composition, and the trifunctional arylsiloxane block (b) acts to impart high damping properties to the cured product. Therefore, the viscoelastic vibration damper 5 made from this cured product possesses both high elasticity and high damping properties.

[0043] The siloxane block (a) represented by the formula (1) that constitutes the organopolysiloxane block copolymer (A) has a substituted or unsubstituted monovalent hydrocarbon group R that does not have an aliphatic unsaturated group, and the number of carbon atoms is 1 to 10. Examples include alkyl groups such as methyl, ethyl, propyl, butyl, hexyl, and octyl; cycloalkyl groups such as cycloheptyl and cyclohexyl; aryl groups such as phenyl, naphthyl, tolyl, and xylyl; aralkyl groups such as benzyl, phenylethyl, and phenylpropyl; and groups in which a part or all of the hydrogen atoms of these groups are substituted with halogen atoms such as chlorine, fluorine, and bromine, or cyano groups, such as halogenated hydrocarbon groups such as chloromethyl, trifluoropropyl, chlorophenyl, and difluorophenyl, and cyanoalkyl groups such as β-cyanoethyl, γ-cyanopropyl, and β-cyanopropyl. In the present invention, since synthesis is easy, a methyl group is preferred. In the formula (1), the integer n representing the degree of polymerization is preferably 3 to 150, and more preferably in the range of 10 to 50.

[0044] The trifunctional arylsiloxane block (b) represented by the average unit formula of the formula (2) that constitutes the organopolysiloxane block copolymer (A) preferably has 3 to 150 silicon atoms, and particularly preferably 5 to 50. In this average unit formula (2), the substituted or unsubstituted aryl or alkaryl group R 1 has 6 to 12 carbon atoms, and examples include phenyl group, tolyl group, xylyl group, ethylphenyl group, chlorophenyl group, bromophenyl group, cyanophenyl group, 4-methylphenyl group, 2,4-diethylphenyl group, etc. The most suitable R in the present invention 1 is a phenyl group.

[0045] The proportion of siloxane block (a) in the organopolysiloxane block copolymer (A) is preferably 20-60% by weight, and more preferably 30-50% by weight. If the proportion of siloxane block (a) is low, the resulting cured product will have low elasticity, and if the proportion is high, the resulting cured product will have low damping properties. Similarly, the proportion of trifunctional arylsiloxane block (b) in the organopolysiloxane block copolymer (A) is preferably 30-80% by weight, and more preferably 40-60% by weight. If the proportion of siloxane block (b) is low, the resulting cured product will have low damping properties, and if the proportion is high, the resulting cured product will have low elasticity. Therefore, the proportion of siloxane block (a) and trifunctional arylsiloxane block (b) in the organopolysiloxane block copolymer (A) is adjusted according to the balance between elasticity and damping properties.

[0046] Furthermore, the organopolysiloxane block copolymer (A) is composed of units (c) represented by formula (3) above, in which at least a portion of the molecular chain ends are sealed. These terminal units (c) provide crosslinking points to the block copolymer (A), and the amount of terminal units (c) adjusts the crosslinking density of the cured product. In these terminal units (c) represented by formula (3), the alkenyl group R 2 Examples include those with 2 to 8 carbon atoms, such as vinyl, allyl, propenyl, butenyl, and hexenyl. Also, substituted or unsubstituted monovalent hydrocarbon groups R 3 Examples of such groups include those similar to those exemplified for R in formula (1) above. The proportion of terminal units (c) in the organopolysiloxane block copolymer (A) is preferably 1 to 10% by weight.

[0047] In organohydrogenpolysiloxane (B), the hydrogen atoms may be bonded to either silicon atoms at the molecular ends or silicon atoms along the molecular chain. Specifically, the following average empirical formula (4): [ka] [In the formula, R 4It has the same meaning as R in the above formula (1), and a and b are numbers satisfying 0 < a ≤ 3, 0 < b ≤ 2, and 0 < a + b < 4, respectively. What is represented by this is used. In the organohydrogenpolysiloxane represented by this average composition formula, the siloxane skeleton may be not only linear but also cyclic, branched or resinous (network).

[0048] In addition, for the organopolysiloxane block copolymer (A) and the above organohydrogenpolysiloxane (B), it is preferable that the component (B) is crosslinked at a ratio such that the number of hydrogen atoms bonded to silicon atoms is 0.4 to 4.0 per alkenyl group in the component (A). Further, an addition reaction catalyst (C) may be added to promote the crosslinking reaction between the component (A) and the component (B) for curing. The addition reaction catalyst (C) is not particularly limited, and for example, known ones such as chloroplatinic acid, an alcohol-modified solution of chloroplatinic acid, a coordination compound of chloroplatinic acid and olefins or vinylsiloxane, tetrakis(triphenylphosphine)palladium, and chlorotris(triphenylphosphine)rhodium can be applied.

[0049] The vibration isolator 1 of the present invention has the basic structure described above, and various embodiments as described below are disclosed. Hereinafter, each embodiment will be described.

[0050] <<Example 1>> First, Example 1 shown in Fig. 1(a) is so-called the basic form. For the viscoelastic vibration isolator 5, the bottom is fixed to the base base 2, while there is no member (the holding frame 7 described below) that particularly surrounds it on its side peripheral part. Further, the fixing projection 6 is provided downward in one piece at the center of the mounting base 3. Above the mounting base 3, a screw part for attachment (attachment screw 8) is provided so as to face the fixing projection 6, and this is arranged concentrically with the fixing projection 6. In addition, the load vibration isolator 4 is arranged at an appropriate interval on the outer peripheral side of the viscoelastic vibration isolator 5. In this Example 1, a compression coil spring is applied as the load vibration isolator 4.

[0051] Example 2 Furthermore, Embodiment 2, shown in Figure 1(b), shares the same basic configuration as Embodiment 1, but the base 2 includes a cylindrical (in this case, cylindrical) retaining frame 7 as part of the base 2, which restricts the viscoelastic vibration damper 5 on its outer circumference. This retaining frame 7 is provided extending from the base 2 toward the mounting base 3. Embodiment 2 corresponds to claim 3 of the claims. With this configuration, when a vibration load is applied to the viscoelastic vibration damper 5, vibration damping performance is obtained that controls the deformation state of the viscoelastic vibration damper 5 by the retaining frame 7, compared to Embodiment 1. In this Embodiment 2, the base 2 and the retaining frame 7 ultimately form a cup-shaped (container-shaped) configuration that accommodates the viscoelastic vibration damper 5. With such a cup-shaped configuration, it is possible to adopt a process in which the vibration damping member 1 is left in a semi-assembled state, uncured viscoelastic material is injected into the retaining frame 7, and this is heated and cured to form the viscoelastic vibration damper 5. Incidentally, the retaining frame 7 can be formed integrally with the base 2, or it can be formed separately and then glued and fixed to the base 2 in a cup shape.

[0052] Example 3 Furthermore, Embodiment 3, shown in Figure 1(c), shares the same basic configuration as Embodiments 1 and 2, but the fixing projection 6 is formed in a tapered shape, with its diameter gradually decreasing towards the free end side that is inserted into the viscoelastic vibration damper 5. This Embodiment 3 corresponds to the configuration described in claim 5 of the patent claims. In such embodiments, the deformation of the viscoelastic vibration damper 5 due to the input vibration load can be controlled by the taper angle of the fixing projection 6.

[0053] Example 4 Furthermore, Embodiment 4 shown in Figure 2(a) shares the same basic configuration as the embodiments described above, but the fixing projection 6, which is provided downward from the mounting base 3, is divided in the compression direction (vertical direction) of the load vibration damper 4 and provided in multiple parts. This configuration allows for more diverse control of the deformation state of the viscoelastic vibration damper 5 due to the input vibration load. This Embodiment 4 corresponds to claim 6 in the claims.

[0054] Example 5 Furthermore, Embodiment 5, shown in Figure 2(b), shares the same basic configuration as the embodiments described above, but the retaining frame 7, which is provided as part of the base 2 and rises from the base 2, is not cylindrical, but is divided in the compression direction (up and down direction) of the load vibration damper 4. Also, the lower surface of the viscoelastic vibration damper 5 is not in direct contact with the base 2, and is supported in a hollow manner. In addition, the tip of the fixing projection 6 is installed in a state where it penetrates the viscoelastic vibration damper 5. By adopting this configuration, a different vibration damping performance can be obtained compared to, for example, when the retaining frame 7 is formed in a cylindrical shape. This Embodiment 5 corresponds to claim 7 in the claims.

[0055] Example 6 Furthermore, Embodiment 6, shown in Figure 2(c), shares the same basic configuration as the above embodiment, but the fixing projection 6 is installed in a state where it penetrates the viscoelastic vibration damper 5, and the base 2 is provided with a through hole 21 to allow further downward movement of the fixing projection 6. Also, the viscoelastic vibration damper 5 is supported in a hollow form, similar to Embodiment 5. This configuration provides different vibration damping performance compared to, for example, the case where the tip of the fixing projection 6 is embedded and fixed within the viscoelastic vibration damper 5. This Embodiment 6 corresponds to claim 8 in the claims.

[0056] Examples 7 and 8 Furthermore, Examples 7 and 8 shown in Figures 3(a) and 3(b) illustrate modified versions of the load-bearing vibration isolation body 4. Example 7 is a configuration in which a tension coil spring 4A is used instead of a compression coil spring as the load-bearing vibration isolation body 4. Example 8 is a configuration in which a diaphragm spring 4B is used as the load-bearing vibration isolation body 4. Furthermore, due to the different configurations of the load-bearing vibration isolation body 4, modifications are also made to the base 2 and mounting base 3 according to each spring element. Specifically, in embodiment 7, which uses a tension coil spring 4A, a vertical wall portion 22 is raised from the base 2, and a suspension portion 23 is formed to protrude from the upper part of this vertical wall portion 22 in an inner flange shape. In addition, a downward-facing wall portion 31 is provided from the mounting base 3, and a receiving portion 32 is formed to protrude from the lower part of this downward-facing wall portion 31 in an outer flange shape. The tension coil spring 4A is then hooked between these suspension portion 23 and receiving portion 32 to cushion and support the supported body W. Furthermore, in Embodiment 8, which uses a diaphragm spring 4B, a configuration is adopted in which the mounting base 3 is supported above the diaphragm spring 4B. Also, due to the shape of such a diaphragm spring 4B, a sufficiently large gap is formed in the center, for example, and a viscoelastic vibration damper 5 is provided there. In this way, by having the load vibration damper 4 composed of a tension coil spring 4A or a diaphragm spring 4B, a different vibration damping performance is obtained compared to when the load vibration damper 4 is composed of a compression coil spring. Furthermore, Examples 7 and 8 correspond to claim 9 in the claims.

[0057] Example 9 Furthermore, in the embodiment 9 shown in Figure 3(c), both the base 2 and the mounting base 3 are provided with fixing protrusions 6, and these fixing protrusions 6 are arranged in a facing state, and in this case in an alternating manner (alternating in a vertical cross-sectional view), so as to be inserted into the viscoelastic vibration damper 5. Note that this embodiment 9 is an embodiment in which fixing protrusions 6 are provided on both the base 2 and the mounting base 3, and is a configuration that is included in the phrase "at least one of the base 2 and the mounting base is provided with fixing protrusions,..." described in claim 1.

[0058] Example 10 Furthermore, the embodiment 10 shown in Figure 4(a) is an example of a configuration in which the load vibration damper 4, which is composed of spring elements, is not exposed (built-in). Specifically, a bottomed cylindrical bowl-shaped casing with a hollow interior is first formed by the base 2 and the retaining frame 7, and the viscoelastic vibration damper 5 is provided to cover the upper part of this casing. The viscoelastic vibration damper 5 is also bonded and fixed on its outer circumference to the upper inner circumference of the retaining frame 7, and on its inner circumference to the outer circumference of the fixing projection 6. Furthermore, when a large load or vibration acts on the mounting base 3 from the supported body W, the fixing projection 6 compresses the load-dissipating vibration damper 4, and the viscoelastic vibration damper 5, which is adhesively fixed to both the inner and outer circumferences, deforms, thereby providing vibration isolation. In this embodiment 10, a pressing surface 61 is formed at the tip of the fixed projection 6 that presses against the load vibration damper 4, thereby ensuring a sufficiently flat surface for stable pressing of the load vibration damper 4. In addition, a positioning projection 24 is formed on the base 2 to position the load vibration damper 4 (compression coil spring).

[0059] Examples 11 and 12 Furthermore, in the embodiment 11 shown in Figure 4(b), the fixing projection 6, which is installed in a recessed state within the viscoelastic vibration damper 5, is formed separately from the base 2 or the mounting base 3, that is, it is formed separately from both the base 2 and the mounting base 3. In this embodiment, the fixing projection 6 is spaced apart on the mounting base 3 side. Here, "the fixing projection 6 (spaced apart) on the mounting base 3 side" means that the flat portion 6f (non-recessed portion) of the fixing projection 6 is located closer to the mounting base 3 than the recessed portion (the portion inserted into the viscoelastic vibration damper 5). When a vibration load is input to the vibration isolation member 1, until the mounting base 3 contacts the flat portion 6f of the fixing projection 6, only the load vibration isolation body 4 compresses to cushion and support the supported body W. After the mounting base 3 contacts the flat portion 6f of the fixing projection 6, the viscoelastic vibration isolation body 5 also deforms via the fixing projection 6 along with the compression of the load vibration isolation body 4, cushioning and supporting the load of the supported body W. This is an example of a so-called two-stage compression configuration. Furthermore, Example 12 is a variation of Example 11, and as an example, as shown in Figure 5(a), the fixing protrusions 6 are spaced apart on the base 2 side, and equivalent effects and advantages can be obtained in Example 12 as in Example 11. Also, in the examples of Figures 4(b) and 5(a), the shape of the flat portion 6f is configured to be larger than the diameter (width) of the fixing protrusion 6, but it may be configured to be the same size as the diameter (width) of the fixing protrusion 6. In addition, in this embodiment, the end shape of the fixing protrusion 6 on the side that abuts the base 2 or mounting base 3 only needs to be able to transmit force so as to deform the viscoelastic vibration damper 5 along with the compression of the load vibration damper 4 when in contact with the base 2 or mounting base 3, and may be a curved surface or a shape other than flat (flat portion). Note that Examples 11 and 12 correspond to claim 12 in the claims.

[0060] Example 13 Furthermore, Example 13 is a variation example in which, as shown in Figure 5(b) as an example, the fixing protrusions 6 are spaced apart on the base 2 side and also spaced apart on the mounting base 3 side. That is, Example 13 comprises a first fixing protrusion 6A formed separately from the base 2 and a second fixing protrusion 6B formed separately from the mounting base 3 as the fixing protrusion 6. Of these, one end of the first fixing protrusion 6A is fixedly inserted into the first viscoelastic vibration damper 5A which is fixedly bonded to the base 2, and the other end is positioned to face the direction of the mounting base 3. The other end of the second fixing protrusion 6B is fixedly inserted into the second viscoelastic vibration damper 5B which is fixedly bonded to the mounting base 3, and the other end is positioned to face the direction of the base 2, with the other end being a flat portion 6f. Furthermore, the first fixing protrusion 6A and the second fixing protrusion 6B are spaced apart from each other when no vibration load is applied to the vibration isolation member 1, but are arranged so that at least a portion of them can come into contact with each other when a vibration load is applied to the vibration isolation member 1. When a vibration load is applied to the vibration isolation member 1, until the first fixing protrusion 6A and the second fixing protrusion 6B come into contact, only the load vibration isolation body 4 is compressed to cushion and support the supported body W. After the first fixing protrusion 6A and the second fixing protrusion 6B come into contact, the first viscoelastic vibration isolation body 5A and the second viscoelastic vibration isolation body 5B deform together with the compression of the load vibration isolation body 4, respectively, to cushion and support the supported body W. In this embodiment 13, a three-stage compression configuration can be obtained by making the distance from the second fixing projection 6B (flat portion 6f) to the base 2 and the distance from the first fixing projection 6A (flat portion 6f) to the mounting base 3 different. In addition, by making the complex modulus and shape of the first viscoelastic vibration damper 5A and the second viscoelastic vibration damper 5B different, the vibration damping characteristics with two-stage or three-stage compression can be further diversified. Also, in the embodiment shown in Figure 5(b), the shape of the flat portion 6f (surface on the other end) is configured to be larger than the diameter (width) of the first fixing projection 6A and the second fixing projection 6B, but it may also be configured to be the same size as the diameter (width) of the first fixing projection 6A and the second fixing projection 6B. Furthermore, in this embodiment, the other end surface of each fixing projection only needs to be able to transmit force in such a way that it deforms the first viscoelastic vibration damper 5A and the second viscoelastic vibration damper 5B, respectively, along with the compression of the load vibration damper 4, when the first fixing projection 6A and the second fixing projection 6B are in contact with each other, and may be a curved surface or other shape other than flat. Also, the shape of the other end surface of each fixing projection may be different for the first fixing projection 6A and the second fixing projection 6B. Note that the above embodiment 13 corresponds to claim 13 in the claims.

[0061] Furthermore, the configuration examples shown in Figures 6(a) to (h) are variations of the above-described embodiment 6 (Figure 2(c)), for example, in which the shape of the viscoelastic vibration damper 5 is changed. In other words, in embodiment 6, the viscoelastic vibration damper 5 was cylindrical, or more specifically, a cylindrical block body with a hole for attaching the fixing projection 6 provided through the center, but the viscoelastic vibration damper 5 does not necessarily have to be formed in such a cylindrical shape. Specifically, it can be formed as a three-dimensional object having the cross-sectional shape shown in Figures 6(a) to (h). Here, Figures 6(f) to (h) are shown without the load vibration damper 4 (compression coil spring).

[0062] Furthermore, the configuration examples shown in Figures 7(a) and 7(b) are modified examples in which the retaining frame 7 constituting the casing wall surface is formed in a tapered shape, compared to, for example, the above embodiment 6 (Figure 2(c)). Specifically, Figure 7(a) is a variation example in which the inside of the casing housing the viscoelastic vibration damper 5 is formed to narrow towards the base 2. On the other hand, Figure 7(b) is a variation example in which the inside of the casing is formed to widen towards the base 2. Note that since the outer circumferential surface of the viscoelastic vibration damper 5 is bonded and fixed to the inner circumference of the retaining frame 7, the cross-sectional shape (outer shape) of the viscoelastic vibration damper 5 is also formed in a frustoconical shape to match the inner surface of the retaining frame 7 (the casing shape).

[0063] Furthermore, the configuration examples shown in Figures 8(a) to 8(c) are variations of the above-described embodiment 6 (Figure 2(c)), for example, in which the fixed projection 6, which is installed in a state of being inserted into the viscoelastic vibration damper 5, is modified. In other words, in embodiment 6, the fixed projection 6 was formed in the shape of a simple rod, but the fixed projection 6 is not necessarily limited to this shape. Specifically, for example, as shown in Figure 8(a), a flange-shaped flat portion (referred to as the pressing portion 62) is provided at the pressing tip of the rod-shaped projection, and this pressing portion 62 can be embedded and fixed inside the viscoelastic vibration damper 5. This makes it possible to increase the pressing area when the fixed projection 6 presses into the viscoelastic vibration damper 5. Figure 8(b) shows an example configuration in which two pressing parts 62 are provided at appropriate intervals in the axial direction on the pressing tip of the fixing projection 6. Furthermore, Figure 8(c) shows an example configuration in which a single rod-shaped fixing projection 6 is provided in the center of the base 2, and fixing projections 6 are provided at two locations on the outer circumference of the mounting base 3, with these fixing projections 6 installed in an alternating manner. Note that the configuration example in Figure 8(c) is similar to that of Embodiment 9 (Figure 3(c)), and can be said to be a modified example of Embodiment 9 in which a retaining frame 7 is provided as part of the base 2. Incidentally, in Figures 8(b) and 8(c) above, the load vibration damper 4 is omitted from the illustration.

[0064] Furthermore, the configuration examples shown in Figures 9(a) to 9(c) are variations of the above-described embodiment 6 (Figure 2(c)), in which the method of installing the fixed projection 6 to the viscoelastic vibration damper 5 is different, or in other words, the installation configuration of the fixed projection 6 and the viscoelastic vibration damper 5 is different. That is, in embodiment 6, the tip of the fixed projection 6, which is formed in the shape of a single rod, was installed so that it completely protruded from the viscoelastic vibration damper 5, but the fixed projection 6 and the viscoelastic vibration damper 5 are not necessarily limited to this installation configuration. Specifically, for example, as shown in Figure 9(a), it is possible to install the fixed projection 6 by embedding and fixing its pressing tip within the viscoelastic vibration damper 5. Furthermore, the configuration example shown in Figure 9(b) is one in which the pressing tip of the fixing projection 6 is made to penetrate the lower end surface of the viscoelastic vibration damper 5, and such an installation configuration can also be adopted. Furthermore, the configuration example shown in Figure 9(c) is an installation configuration in which flange portions 63 are provided at the pressing lower end and the middle portion of the fixing projection 6, and the viscoelastic vibration damper 5 is sandwiched between these flange portions 63 from the load direction (up and down direction). Note that in Figures 9(b) and 9(c), the load-bearing vibration isolation body 4 is omitted from the illustration.

[0065] The vibration-damping member 1 in each of the embodiments described above all exhibits excellent vibration-damping effects. In other words, the vibration-damping member 1 of the present invention is provided with a load-bearing vibration-damping body 4 that cushions and supports the load of the supported body W, and therefore exhibits high load-bearing capacity. Furthermore, the viscoelastic vibration damper 5 is configured such that, for integration with either the base 2 or the mounting base 3, or both, a fixing projection 6 is inserted into the viscoelastic vibration damper 5, thereby securing the fixing projection 6 to the viscoelastic vibration damper 5. This configuration allows the damper to exhibit vibration damping even against vibration loads from directions different from the compression direction of the load vibration damper 4. Furthermore, the viscoelastic vibration damper 5 has a complex modulus of elasticity of 1 × 10⁻⁶. 5 Because it is composed of a viscoelastic material with a loss tangent of 0.2 or more at MPa or higher, it can better support vibration damping and high load resistance.

[0066] Furthermore, in the vibration-damping member 1 of each embodiment described above, the base 2 and the mounting base 3 may be swapped, and equivalent high load-bearing capacity and vibration damping performance can be obtained. [Explanation of Symbols]

[0067] 1. Vibration isolation member 2 Base 3 Mounting base 4. Load-bearing vibration isolation body 4A Tension Coil Spring 4B Diaphragm Spring 5. Viscoelastic vibration damper 5A First viscoelastic vibration isolation body 5B Second viscoelastic vibration isolation body 6 Fixed protrusion 6A 1st fixing protrusion 6B 2nd fixing protrusion 6f Flat section 7 Holding slots 8 Mounting screws 21 Throughpores 22 Vertical wall section 23 Hanging part 24 Positioning protrusions 31 Hanging wall section 32 Receiving part 61 Pressing surface 62 Pressing part 63 Flange section B Vibration base W is the supported body

Claims

1. A vibration-damping member for mounting a bearing body to a vibrating base in a vibrating environment, which reduces or avoids vibrations. This vibration-damping component is A base that is fixed to the vibrating substrate, A mounting base fixed to the supported body, A load-shielding vibration damper connects and fixes the base and mounting base so that they face each other, thereby cushioning and supporting the load of the supported body. It comprises a viscoelastic vibration damper that is fixedly bonded to both the base and the mounting base, At least one of the base base and the mounting base is provided with a fixing projection in the direction in which the base base and the mounting base face each other, and the fixing projection is fixed and bonded to the viscoelastic vibration damper in an inserted state. Furthermore, the load-bearing vibration-damping body is characterized by being composed of spring elements.

2. The vibration-damping member according to claim 1, characterized in that the load-damping body is a compression coil spring.

3. The vibration damping member according to claim 1 or 2, characterized in that the base portion comprises a cylindrical retaining frame facing the mounting base side, which has the fixing protrusions, and a viscoelastic vibration damping body is provided within this retaining frame.

4. The vibration damping member according to claim 1 or 2, characterized in that the mounting base comprises a cylindrical retaining frame facing the base side having the fixing protrusions, and a viscoelastic vibration damping body is provided within this retaining frame.

5. The vibration-damping member according to claim 1 or 2, characterized in that the fixing projection is formed in a tapered shape, with the diameter of the free end side that is inserted into the viscoelastic vibration-damping body gradually decreasing.

6. The vibration-damping member according to claim 1 or 2, characterized in that the fixing protrusions are divided in the compression direction of the load vibration-damping body and a plurality of them are provided.

7. The vibration-damping member according to claim 3, characterized in that the retaining frame is divided in the compression direction of the load vibration-damping body.

8. The vibration-damping member according to claim 1 or 2, characterized in that the fixing projection is provided in a state of being inserted through the viscoelastic vibration-damping body.

9. The vibration-damping member according to claim 1, characterized in that the load-bearing vibration-damping body is a tension coil spring or a diaphragm spring.

10. The viscoelastic vibration damper has a complex modulus of 1 × 10⁻⁶. 5 The vibration-damping member according to claim 1 or 2, characterized in that it has a power of MPa or higher and a loss tangent of 0.2 or higher.

11. The vibration-damping member according to claim 10, characterized in that the viscoelastic vibration-damping body is an aryl-modified silicone resin composition.

12. The fixing projection, which is fixedly bonded to the viscoelastic vibration damper in an inserted state, is formed separately from the base base or mounting base and is positioned at a distance from the base base or mounting base. When a vibration load is applied to the vibration isolation member, until the base or mounting base comes into contact with the fixing projection, only the load-bearing vibration isolation body compresses, cushioning and supporting the supported body. The vibration-damping member according to claim 1 or 2, characterized in that, after the base or mounting base comes into contact with the fixing projection, the viscoelastic vibration-damping body deforms along with the compression of the load vibration-damping body, thereby cushioning and supporting the supported body.

13. The aforementioned fixing projection comprises a first fixing projection formed separately from the base and a second fixing projection formed separately from the mounting base. Of these, the first fixing projection is fixed and bonded with one end inserted into the first viscoelastic vibration damper which is fixed and bonded to the base, and is positioned so that the other end faces the direction of the mounting base, and the second fixing projection is fixed and bonded with one end inserted into the second viscoelastic vibration damper which is fixed and bonded to the mounting base, and is positioned so that the other end faces the direction of the base. Furthermore, the first and second fixing protrusions are spaced apart from each other when no vibration load is applied to the vibration-damping member, and are arranged so that at least a portion of them can come into contact with each other when a vibration load is applied to the vibration-damping member. When a vibration load is applied to the vibration isolation member, until the first and second fixing protrusions come into contact, only the load-bearing vibration isolation body compresses, cushioning and supporting the supported body. The vibration-damping member according to claim 1 or 2, characterized in that, after the first fixed projection and the second fixed projection come into contact, the first viscoelastic vibration-damping body and the second viscoelastic vibration-damping body deform together with the compression of the load vibration-damping body, thereby cushioning and supporting the supported body.

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