JP4344677B2 - Anti-vibration support device - Google Patents

Description

  According to the present invention, the first and second liquid chambers whose volumes expand and contract with the input of vibration are partitioned by a partition member that movably supports the movable plate between the first and second movable plate holders. The present invention relates to a vibration support device.

  Such an anti-vibration support device is known, for example, from Patent Documents 1 and 2 below. This type of conventional anti-vibration support device supports the movable plate through a minute gap between the first and second movable plate holders, thereby allowing the movable plate to be moved in accordance with the fluctuation of the hydraulic pressure within the gap. It was possible to move. This movable plate type anti-vibration support device moves when the minute vibration (amplitude is about 0.1 mm) in the engine sound region is input, and the dynamic spring constant becomes extremely small. While there is an advantage that it is high, there is a problem that no damping force is generated in the region of minute vibration in which the movable plate can move (see the broken line in FIG. 6). Therefore, when the vehicle travels on a flat road with a relatively large vibration (amplitude is about 0.25 mm) while moving the movable plate and making the dynamic spring constant as small as possible in the engine sound range. It is desirable to immediately generate a damping force by restraining the movement of the movable plate.

An anti-vibration support device having a structure in which the periphery of the movable film formed of an elastic member is fixed to first and second movable plate holders and the movable film is bent in accordance with a change in hydraulic pressure is also known. Although this movable membrane type vibration isolating support device can generate a damping force in the entire amplitude region, the dynamic spring constant in the engine sound region of a minute amplitude is higher and larger than that of the movable plate type vibration isolating support device. There is a problem that the damping force is low in the amplitude region (see the chain line in FIG. 6).
No. 6-37217 Japanese Utility Model Publication No. 5-24835

  By the way, in a movable plate type anti-vibration support device, in the engine sound region, the movable plate can be moved to make the dynamic spring constant as small as possible. In order to generate this, it is necessary to precisely manage a minute gap between the movable plate and the first and second movable plate holders. However, in the conventional structure in which the movable plate is floatingly supported so as to be movable between the first and second movable plate holders, the size of the gap varies depending on the dimensional accuracy of the first and second movable plate holders and the movable plate. In addition, since the rubber movable plate and the first and second movable plate holders swell due to contact with the liquid, it is necessary to set a large initial set value of the gap, and the function of the movable plate is switched. There was a problem that the amplitude had to be larger than a desired value.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to enable accurate management of the gap between the movable plate of the vibration-proofing support device and the first and second movable plate holders.

In order to achieve the above object, according to the first aspect of the present invention, the first attachment member attached to the vibrating body, the second attachment member attached to the support, and the first and second attachment members An elastic body connecting the first liquid chamber, the first liquid chamber partitioned inside the elastic body, and the first liquid chamber communicated with each other through an attenuation passage, and the volume is reduced according to the expansion / reduction of the volume of the first liquid chamber A second liquid chamber is formed of an elastic member that is arranged with a predetermined interval so as to partition the second liquid chamber and the first and second liquid chambers, and has an opening that communicates the first and second liquid chambers. 1. An anti-vibration support device comprising: a second movable plate holder; and a movable plate supported between the first and second movable plate holders. The movable plate is first fixed from the radially inner side to the outer side. A first slit, a movable portion facing the opening, a second slit, and a second fixed portion, By fixing the fixed portion and the second fixed portion between the first and second movable plate holders, and forming a recess on the surface of the first and second movable plate holders facing the movable portion, An anti-vibration support device is proposed in which a gap is formed that allows the movable portion to be displaced .

According to the invention described in claim 2 , in addition to the structure of claim 1 , the first and second movable plate holders are sandwiched between the first and second backup plates made of a rigid member, 1. An anti-vibration support device is proposed in which recesses are formed on the surfaces of the first and second movable plate holders facing the second backup plate.

According to the invention described in claim 3 , in addition to the configuration of claim 1 or claim 2, a reinforcing plate extending in parallel with the movable plate is embedded in the first and second movable plate holders. A characteristic anti-vibration support device is proposed.

According to the invention described in claim 4 , in addition to the structure of any one of claims 1 to 3 , the gap between the first and second movable plate holders and the movable plate is movable. An anti-vibration support device is proposed, characterized in that it is varied in the radial direction or circumferential direction of the plate.

According to the invention described in claim 5 , in addition to the structure of any one of claims 1 to 3 , the first and second movable plate holders are formed with projections protruding toward the movable plate. An anti-vibration support device characterized by the above is proposed.

According to the invention described in claim 6 , in addition to the structure of any one of claims 1 to 5 , the movable plate is made of a material having a higher Young's modulus than the first and second movable plate holders. An anti-vibration support device characterized by comprising:

According to the invention described in claim 7 , in addition to the structure of any one of claims 1 to 6 , the movable plate is made of polyethylene terephthalate or polyimide, and is provided with an anti-vibration support. A device is proposed.

  The engine E of the embodiment corresponds to the vibrating body of the present invention, and the vehicle body frame F of the embodiment corresponds to the support body of the present invention.

According to the first aspect of the present invention, when the elastic body connecting between the first and second mounting members is deformed by the input of vibration, vibrational hydraulic pressure is applied to the first liquid chamber partitioned inside the elastic body. appear. When the amplitude of vibration is small, the movable portion of the movable plate vibrates within the range of the gap between the first and second movable plate holders, so that no hydraulic pressure is generated in the first liquid chamber, and the vibration isolating support device The dynamic spring constant can be reduced and noise can be cut off. Further, when the amplitude of vibration is large, the movable part of the movable plate closes the openings of the first and second movable plate holders to generate liquid pressure in the first liquid chamber, so that the liquid in the first and second liquid chambers is attenuated. It is possible to generate a damping force that attenuates the vibration by going back and forth through the passage. A first fixed portion radially inward of the movable plate and a second fixed portion radially outer are sandwiched and fixed between the first and second movable plate holders, and the first and second fixed portions are interposed between the first and second fixed portions. Since the movable part is provided via the two slits, the movable part can be freely moved. In addition, since a gap that enables displacement of the movable part is formed by forming a recess on the surface of the first and second movable plate holders facing the movable part, there is a manufacturing variation in the thickness of the movable plate. Even when the first and second fixed portions of the movable plate are fixed by being sandwiched between the first and second movable plate holders made of elastic members, the first and second movable plate holders are elastically deformed. Variations in the thickness of the movable plate can be absorbed, and the dimensional accuracy of the gap between the movable portion of the movable plate and the concave portions of the first and second movable plate holders can be increased. Thereby, the amplitude of the vibration in which the movable plate switches between the state of opening the opening of the movable plate holder and the state of closing the movable plate holder can be managed with high accuracy .

According to the second aspect, first, first the second movable plate holder made of a rigid member, sandwiched between the second backup plate, first, first, second movable plate opposite to the second backup plate Since the concave portions are formed on the surface of the holder, the first and second backup plate holders regulate the bending of the first and second movable plate holders, while the first and second movable plate holders come into contact with the liquid and heat. The volume increase due to expansion is absorbed by the recess, and the change in the gap between the movable portion of the movable plate and the first and second movable plate holders can be minimized.

According to the configuration of the third aspect , since the reinforcing plate extending in parallel with the movable plate is embedded in the first and second movable plate holders, the first and second movable plate holders are restrained by the reinforcing plate and the liquid It is possible to reduce the influence of swelling and thermal expansion caused by the contact between the movable plate and the gap between the movable portion of the movable plate and the first and second movable plate holders.

According to the configuration of the fourth aspect , since the gap between the first and second movable plate holders and the movable plate is changed in the radial direction or the circumferential direction of the movable plate, the movable plate that vibrates with hydraulic pressure is provided. The area of contact with the first and second movable plate holders can be gradually increased to suppress the occurrence of collision noise.

According to the fifth aspect of the present invention, since the first and second movable plate holders are formed with the protrusions that project toward the movable plate, the movable plate that vibrates with the hydraulic pressure contacts the first and second movable plate holders. Sometimes, the protrusions can be gradually deformed to suppress the occurrence of collision noise.

According to the configuration of the sixth aspect , since the Young's modulus of the movable plate is set higher than the Young's modulus of the first and second movable plate holders, the fixed portion of the movable plate is sandwiched between the first and second movable plate holders. The first and second movable plate holders are elastically deformed to absorb variations in the thickness of the movable plate, and the gap between the movable portion of the movable plate and the first and second movable plate holders is fixed. The dimensional accuracy can be further increased.

According to the configuration of the seventh aspect , since the movable plate is made of polyethylene terephthalate or polyimide, swelling of the movable plate due to contact with the liquid can be minimized.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.

  1 to 6 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a vibration isolating support device, FIG. 2 is an enlarged view of a part 2 in FIG. 1, and FIG. 3 is an exploded view of a partition member. 4 is a view taken in the direction of the arrow 4 in FIG. 3, FIG. 5 is a view taken in the direction of the arrow 5 in FIG. 3, and FIG.

  As shown in FIGS. 1 to 5, an anti-vibration support device M used for elastically supporting an automobile engine on a body frame has a substantially axisymmetric structure with respect to an axis (attenuation axis) L. Thus, a flat plate-like first mounting member 12 having a stud bolt 11 attached to the engine E as a vibrating body, and a cylindrical second mounting member 13 having a flange portion 13a fixed to the vehicle body frame F as a support. With. A caulking portion 16a at the lower end of the annular elastic support ring 16 is fixed to the upper end of the second mounting member 13 by caulking, and the upper end of the elastic body 17 formed in a conical shape with thick rubber is the first attachment. While being fixed to the lower surface of the member 12 by vulcanization adhesion, the lower end is fixed to the upper part of the elastic body support ring 16 by vulcanization adhesion.

  The elastic body 17 is divided into an upper half and a lower half by a reinforcing ring 18 embedded in an intermediate portion in the axis L direction, and the buckling strength of the elastic body 17 in the axis L direction by the reinforcing ring 18. The spring constant in the direction orthogonal to the axis L is increased while ensuring the above. Further, a stopper portion 17 a that can contact the upper surface of the partition member 19 is provided on the lower surface of the elastic body 17 so as to protrude downward. The outer periphery of the partition member 19 and the fixing ring 20 are sandwiched and caulked integrally with the caulking portion 16 a that fixes the lower end of the elastic support ring 16 to the upper end of the second mounting member 13. An outer peripheral portion of a diaphragm 21 covering the lower surface of the partition member 19 is vulcanized and bonded to the fixing ring 20. A first liquid chamber 22 is defined between the elastic body 17 and the partition member 19, and a second liquid chamber 23 is defined between the diaphragm 21 and the partition member 19. The first and second liquid chambers 22 and 23 are filled with a mixture of water and antifreeze liquid (polyethylene glycol).

  The partition member 19 includes a disc-shaped first backup plate 24 and second backup plate 25 whose outer peripheral portions are in contact with each other and whose inner peripheral portions are separated from each other, and between the first and second backup plates 24 and 25. The first movable plate holder 26 and the second movable plate holder 27 made of rubber sandwiched, the disc-shaped movable plate 28 disposed between the first and second movable plate holders 26, 27, and the first and first 2 A rivet 29 for restricting the distance between the central portions of the backup plates 24 and 25 to be constant. The movable plate 28 of the first embodiment is made of rubber, and is cut out from a rubber plate having a thickness of 2 mm, for example. The first and second backup plates 24 and 25 are made of highly rigid metal, and restrict the bending of the first and second movable plate holders 26 and 27 made of rubber.

  The movable plate 28 is a disk-shaped member, and a pair of small-diameter first slits 28a and 28a having a central angle of slightly less than 180 °, and a pair of large-diameter second slits 28b having a central angle of slightly less than 180 °, 28b is concentrically provided with the same phase. A region inside the first slits 28a and 28a and a region outside the second slits 28b and 28b are respectively defined as first and second fixing portions 28c and 28d, and the first slits 28a and 28a and the second slits 28b and 28b. A region sandwiched between the two is the movable portion 28e.

  The first and second backup plates 24 and 25 and the first and second movable plate holders 26 and 27 are formed with a plurality of openings h1... H2. Further, on the surface of the first and second movable plate holders 26 and 27 facing the movable plate 28, the first fixed portions 26 a and 27 a that contact the first fixed portion 28 c inside the movable plate 28, and the movable plate 28. Second fixing portions 26b and 27b are formed in contact with the outer second fixing portion 28d, and shallow concave portions 26c and 27c are formed between the first fixing portions 26a and 27a and the second fixing portions 26b and 27b. .

  Accordingly, the first fixed portion 28c inside the movable plate 28 and the second fixed portion 28d outside the movable plate 28 are respectively the first fixed portions 26a, 27a and the second fixed portions 26a, 27 of the first and second movable plate holders 26, 27. The movable portion 28e of the movable plate 28 faces the concave portions 26c and 27c of the first and second movable plate holders 26 and 27 with a gap α therebetween, and is fixed to the first slits 28a and 27b. 28a and the second slits 28b and 28b enable vertical movement within the gap α.

  And the openings h1,..., H2... Communicating the first and second liquid chambers 22, 23 face the movable portion 28e of the movable plate 28. An annular attenuation passage 30 extending substantially 360 ° is formed on the mating surfaces of the first and second movable plate holders 26 and 27, and one end thereof is connected to the first liquid chamber 22 via the communication hole h3. The other end communicates with the second liquid chamber 23 through the communication hole h4.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  When the vibration of the engine E or the vibration of the vehicle body F is input in the direction of the axis L, which is a damping axis, and the first and second mounting members 12 and 13 approach and separate from each other in the direction of the axis L due to the vibration, the elastic body 17 The volume of the first liquid chamber 22 is increased or decreased by deformation. At this time, with respect to minute amplitude vibration such as idling vibration of the engine E, the movable plate 28 supported with a gap α between the first and second movable plate holders 26 and 27 of the partition member 19 is supported. The movable portion 28e moves up and down with a minute amplitude to absorb pressure fluctuations in the first liquid chamber 22. As a result, the dynamic spring constant of the vibration isolating support device M can be reduced at the time of inputting a vibration having a small amplitude, and high frequency vibration that causes noise can be absorbed.

  Further, when the elastic body 17 is deformed by the input of large amplitude vibration and the hydraulic pressure in the first liquid chamber 22 is greatly increased or decreased, the movable portion 28e of the movable plate 28 is pressed against the first and second movable plate holders 26 and 27. The openings h1,..., H2... Of the first and second backup plates 24, 25 and the first and second movable plate holders 26, 27 are closed. As a result, when the volume of the first liquid chamber 22 decreases, the liquid in the first liquid chamber 22 moves to the second liquid chamber 23 via the communication hole h3, the annular attenuation passage 30 and the communication hole h4, and the first liquid When the volume of the chamber 22 increases, the liquid in the second liquid chamber 23 moves to the first liquid chamber 22 via the communication hole h4, the annular attenuation passage 30 and the communication hole h3, and a large damping force is generated at that time. Therefore, vibration such as car shake can be suppressed.

  When an even greater vibration is input, the elastic body 17 can be prevented from being excessively deformed by the stopper portion 17a of the elastic body 17 greatly deformed downward coming into contact with the upper surface of the partition member 19.

  The graph of FIG. 6 shows the relationship between the amplitude of vibration input to the vibration isolating support apparatus M and tan δ (loss factor).

  The chain line shows the characteristics of a conventional example using a movable film whose periphery is fixed instead of the movable plate 28. When the movable film is used, a hydraulic pressure is generated in the first liquid chamber 22 even when a minute vibration is input. As a result, a damping force is generated and it becomes difficult to effectively shut off the idle vibration and idle noise of the engine E, and if the movable film is greatly bent due to a large amplitude vibration, the film thickness decreases. Since deformation is further promoted, there is a problem that a sufficient damping force cannot be generated when a large amplitude vibration such as a car shake is input.

  The broken line shows the characteristics of the conventional example in which the movable plate 28 made of a rubber plate having a thickness of 2 mm is floatingly supported. Originally, it is desirable that the damping force rises when the amplitude of the input vibration is about 0.1 mm. On the other hand, when the amplitude becomes 0.3 mm or more, the damping force rises with a delay.

  The reason why the rise of the damping force of the conventional movable plate 28 that is floatingly supported is delayed because the gap α cannot be accurately managed. Since the first and second movable plate holders 26 and 27 are molded, the dimensional accuracy is relatively high. However, since the movable plate 28 is cut out from the rubber plate, the thickness dimensional accuracy is relatively low. As a result, the dimensional accuracy of the gap α is governed by the accuracy of the thickness of the movable plate 28.

  However, according to the present embodiment, the first and second fixed portions 28c and 28d of the movable plate 28 are replaced with the first fixed portions 26a and 27a and the second fixed portions 26b of the first and second movable plate holders 26 and 27, respectively. 27c, the first and second movable plate holders 26 and 27 are crushed more when the movable plate 28 is thicker than the set value, and the first and second plates 26 and 27 are collapsed when the movable plate 28 is thinner than the set value. Since the second movable plate holders 26 and 27 are crushed to a lesser extent, the accuracy of the gap α can be increased even if the thickness of the movable plate 28 varies. For the above reasons, it is desirable that the Young's modulus of the movable plate 28 is higher than the Young's modulus of the first and second movable plate holders 26 and 27.

  Thus, when the accuracy of the gap α between the movable plate 28 and the first and second movable plate holders 26 and 27 is increased, the amplitude of the input vibration is about 0.15 mm as shown by the solid line in FIG. When it is less than this, the movable plate 28 can be moved to reduce the dynamic spring constant, and the engine sound blocking effect can be enhanced. When a vibration having an amplitude of about 0.15 mm or more is input, the movable plate 28 closes the openings h1,..., H2... Of the first and second movable plate holders 26, 27 and immediately raises the damping force. Can effectively block vibration with an amplitude of about 0.25 mm when traveling on a flat road.

  7 and 8 show a second embodiment of the present invention. FIG. 7 is a view corresponding to FIG. 2, and FIG. 8 is a view taken along line 8-8 in FIG.

  Although the movable plate 28 of the first embodiment is made of rubber, the movable plate 28 of the second embodiment is a synthetic resin having a thickness of about 100 μm (specifically, polyethylene terephthalate which does not swell easily even when it comes into contact with a liquid). Or polyimide). If both the first and second movable plate holders 26 and 27 and the movable plate 28 are made of rubber that swells by contact with a liquid, the gap α becomes unstable due to the swelling, but the movable plate 28 is difficult to swell. By using a synthetic resin, it is possible to stabilize the gap α while minimizing the influence of swelling. Similarly to the movable plate 28, the first and second movable plate holders 26 and 27 can be made of synthetic resin to further stabilize the gap α. However, the movable plate 28 has the first and second movable plate holders 26 and 26, There is a problem that an undesired hitting sound is generated when touching 27.

  In the second embodiment, in order to minimize the influence of swelling of the first and second movable plate holders 26 and 27, the first and second movable plate holders 26 and 27 are provided as the first and second backup plates 24, Concave portions 26d, 26e; 27d, 27e are formed on the surface in contact with 25. One of the recesses 26d and 27d is formed relatively deep so as to surround the periphery of the openings h1,..., H2..., And the other recesses 26e and 27e are formed relatively shallow in other portions.

  In this manner, the first and second movable plate holders 26 and 27 are formed with the recesses 26d and 26e; 27d and 27e on the surfaces that contact the first and second backup plates 24 and 25, so that the first rubber made first Even if the second movable plate holders 26 and 27 swell due to contact with the liquid, the volume increase due to the swelling is absorbed by the recesses 26d and 26e; 27d and 27e, thereby contributing to further stabilization of the gap α. Can do.

  The recesses 26d and 26e; 27d and 27e of the first and second movable plate holders 26 and 27 alleviate not only the swelling effect of the first and second movable plate holders 26 and 27 but also the thermal expansion effect. The function can also be demonstrated.

  The third embodiment shown in FIG. 9 is a modification of the second embodiment, and the reinforcing plates 31 and 32 made of metal plates are placed inside the first and second movable plate holders 26 and 27 so as to sandwich the movable plate 28. Is buried. By reinforcing the first and second movable plate holders 26 and 27 with the reinforcing plates 31 and 32, the influence of swelling and thermal expansion can be further reduced, and the size of the gap α can be further stabilized.

  By the way, when the movable portion 28e of the movable plate 28 sandwiched between the first and second movable plate holders 26 and 27 vibrates with hydraulic pressure, noise is generated by contacting the first and second movable plate holders 26 and 27. To do. In order to reduce this noise, the first and second movable plate holders 26 and 27 are made of rubber. However, according to the following fourth to sixth embodiments, the movable portion 28e of the movable plate 28 is Noise when contacting the first and second movable plate holders 26 and 27 can be further reduced.

  In the fourth embodiment shown in FIG. 10, the movable portion 28e of the movable plate 28 is waved in the circumferential direction. According to this embodiment, the gap α between the movable portion 28e of the movable plate 28 and the first and second movable plate holders 26 and 27 changes in the circumferential direction and the radial direction, and the movable portion 28e of the movable plate 28 becomes the first. Since the lower surface of the first movable plate holder 26 and the upper surface of the second movable plate holder 27 are in contact with each other, the flow of the liquid between the first and second liquid chambers 22 and 23 is not obstructed when a minute vibration is input. In addition, noise generated when the movable portion 28e of the movable plate 28 contacts the first and second movable plate holders 26 and 27 can be further reduced.

  Note that the same effect can be achieved even when the movable portion 28e of the movable plate 28 is waved in the radial direction instead of being waved in the circumferential direction.

  In the fifth embodiment shown in FIG. 11, a plurality of protrusions 26f, 27f projecting toward the movable portion 28e of the movable plate 28 around the openings h1,..., H2... Of the first and second movable plate holders 26, 27. Are formed at predetermined intervals. According to this embodiment, since the protrusions 26f and 27f are gradually crushed when the movable portion 28e of the movable plate 28 is moved by the hydraulic pressure, it is possible to prevent the occurrence of a collision sound and further reduce the noise.

  In the sixth embodiment shown in FIG. 12, a plurality of projections 26g projecting toward the movable portion 28e of the movable plate 28 at portions where the openings h1,. , 27g are formed at predetermined intervals. Also in this embodiment, when the movable portion 28e of the movable plate 28 is moved by the hydraulic pressure, the protrusions 26g and 27g are gradually crushed, so that it is possible to prevent the occurrence of a collision sound and further reduce the noise.

  Although the embodiments of the present invention have been described above, various design changes can be made without departing from the scope of the present invention.

  For example, the anti-vibration support device M of the embodiment is applied to support the engine E of an automobile, but the present invention can be applied to any other application.

  In the embodiment, the movable plate 28 is formed of a single member. However, the inner peripheral first fixing portion 28c, the outer peripheral second fixing portion 28d, and the central movable portion 28e are divided into two inner and outer annular slits. Alternatively, it may be constituted by a separate member completely separated.

Longitudinal section of anti-vibration support device 2 enlarged view of FIG. Exploded view of partition member 4 direction arrow view of FIG. 5 direction arrow view of FIG. Graph explaining the effect The figure corresponding to the said FIG. 2 based on 2nd Example. Fig. 8-8 arrow view The figure corresponding to the inside of the frame of FIG. 7 according to the third embodiment. The figure corresponding to the inside of the frame of FIG. 7 according to the fourth embodiment. The figure corresponding to the inside of the frame of FIG. 7 according to the fifth embodiment. The figure corresponding to the inside of the frame of FIG. 7 according to the sixth embodiment.

Explanation of symbols

12 First mounting member 13 Second mounting member 17 Elastic body 22 First liquid chamber 23 Second liquid chamber 24 First backup plate 25 First backup plate 26 First movable plate holder
26c recess
2 6d, 26e recess 26f, 26 g projections 27 the second movable plate holder
27c recess
2 7d, 27e recess 27f, 27 g projections 28 movable plate 28a first slit 28b first slit 28c, 28d fixed portion 28e movable section 30 attenuates passage 31 reinforcement plate E engine (vibration member)
F Body frame (support)
h1 opening h2 opening α gap

Claims (7)

A first attachment member (12) attached to the vibrating body (E);
A second attachment member (13) attached to the support (F);
An elastic body (17) for connecting the first and second mounting members (12, 13);
A first liquid chamber (22) partitioned inside the elastic body (17);
A second liquid chamber (23) that communicates with the first liquid chamber (22) via the attenuation passageway (30), and whose volume is reduced / expanded in accordance with the expansion / reduction of the volume of the first liquid chamber (22);
The first and second liquid chambers (22, 23) are arranged at a predetermined interval so as to partition each other, and openings (h1, h2) for communicating the first and second liquid chambers (22, 23) are formed. First and second movable plate holders (26, 27) made of elastic members,
A movable plate (28) supported between the first and second movable plate holders (26, 27);
In an anti-vibration support device comprising:
The movable plate (28) includes a first fixed portion (28c), a first slit (28a), a movable portion (28e) facing the openings (h1, h2), 2 slits (28b) and a second fixed part (28d), the first fixed part (28c) and the second fixed part (28d) being the first and second movable plate holders (26, 27). The movable portion (28e) is formed by forming concave portions (26c, 27c) on the surfaces facing the movable portion (28e) of the first and second movable plate holders (26, 27). A vibration-proof support device characterized in that a gap (α) is formed that enables displacement . The first and second movable plate holders (26, 27) are sandwiched between first and second backup plates (24, 25) made of a rigid member, and are attached to the first and second backup plates (24, 25). The anti-vibration support device according to claim 1, wherein concave portions ( 26d, 26e ; 27d, 27e) are formed on the surfaces of the opposed first and second movable plate holders (26, 27). The reinforcing plate (31, 32) extending in parallel with the movable plate (28) is embedded in the first and second movable plate holders (26, 27), according to claim 1 or 2 . Anti-vibration support device. The gap (α) between the first and second movable plate holders (26, 27) and the movable plate (28) is changed in the radial direction or the circumferential direction of the movable plate (28). The anti-vibration support device according to any one of claims 1 to 3 . First, projection projecting toward the movable plate (28) to the second movable plate holder (26,27) (26f, 26g; 27f, 27g) , characterized in that the formation of the, claims 1 to 3 The vibration-proof support device according to any one of the above. The movable plate (28) is made of a material having a higher Young's modulus than the first and second movable plate holders (26, 27), and the movable plate (28) is any one of claims 1 to 5. Anti-vibration support device. The vibration-proof support device according to any one of claims 1 to 6 , wherein the movable plate (28) is made of polyethylene terephthalate or polyimide.

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