JP2000088036A - Vibrationproof supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply change the vibration characteristic of a vibrationproof supporting device. SOLUTION: A rubber layer 24 is provided on the undersurface of a fixing frame 21, and the bottom of the layer 24 is joined with the top of a casing 31, and a tightly closed space is formed between the rubber layer 24 and casing 31. A diapgragm 33 and partitioning plates 34 and 35 are provided between the rubber layer 24 and casing 31, and the closed space is partitioned into a gas chamber R1, a first and a second oil chamber R1, R2. The partitioning plates 34 and 35 are furnished with small holes 34a and 35a to form an orifice, and a spring 36 is interposed between the diaphragm 33 and the bottom surface of the casing 31. The frame 21 and casing 31 are fixed to an object vibrating or a support therefor, and the object is supported resiliently and a damping force is given thereto which is vibrating. The vibration characteristic of this vibrationproof supporting device can be changed simply to various patterns only through properly selecting the spring constant of the spring 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting a vibrating object on a support member by mounting the support member between an engine of a vehicle and a support frame fixed to the vehicle body or between a vehicle body of a bogie and wheels. The present invention relates to a preventive support device for elastically supporting the object and suppressing vibration of the object.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a rubber layer 12 having a concave portion on the lower surface and fixed to a lower surface of a fixing frame 11, and a rubber layer 12 formed in a cup shape and having a peripheral edge at an upper end. A casing 13 which forms a sealed space between the rubber layer 12 and the rubber layer 12 while being joined to the lower end of the rubber layer 12;
And a casing 13. The deformable isolation film 14 is provided between the first casing 13 and the bottom face of the casing 13 so as to face the bottom surface of the casing 13, and divides the sealed space into an oil chamber and a gas chamber R1. And partition members 15 and 16 which are provided between the first and second oil chambers R2 and R3 to form orifices between the first and second oil chambers R2 and R3. Provided anti-vibration support devices are well known.

[0003]

However, in the above-described conventional vibration isolating and supporting apparatus, the vibration characteristics such as the spring constant are determined by the rubber layer 12, the volume of the gas chamber R1, the separator 14, the partition member 1, and the like.
It is determined by the holes provided in the holes 5 and 16, and it is difficult to change the vibration characteristics.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to address the above problems, and has as its object to provide an anti-vibration support device whose vibration characteristics can be easily and variously changed.

According to the present invention, in the vibration isolating support device constructed as in the above-mentioned conventional device, a spring accommodated in a gas chamber and supported at both ends by a separator and a casing is provided.

In the present invention configured as described above,
Since the spring constant of the spring is related to the vibration characteristics such as the spring constant of the whole anti-vibration support device, by selecting a spring having a different spring constant as the same spring, the vibration characteristics such as the spring constant of the whole anti-vibration support device are changed. Is done. Therefore, according to the present invention, it is possible to easily and variously change the vibration characteristics such as the spring constant of the vibration isolation support device.

[0007]

DETAILED DESCRIPTION OF THE INVENTION a. First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a vibration isolating support device according to the embodiment in a front sectional view.

The anti-vibration support device includes a rubber layer unit A. The rubber layer unit A includes a fixing frame 21. The frame 21 is formed of a flat plate having one side bent downward, and is fixed to a vibrating object (not shown) or a supporting member of the object at the center thereof. For this purpose, a screw 22 that penetrates from the lower surface to the upper surface is assembled. At the center of the lower surface of the fixing frame 21, an upper frame 23 formed in a truncated cone shape with a bottom is fixed by welding or the like at its upper open end. Fixing frame 21 and upper frame 2
A rubber layer 24 as an elastic member having a concave portion formed in the center of the lower surface is fixed to the lower surface of the lower surface 3, and the upper and lower sides of the side surface of the rubber layer 24 are formed in a truncated cone shape. The frame 25 is fixed. The rubber layer unit A including the fixing frame 21, the upper frame 23, the rubber layer 24, the side frame 25, and the like is integrally formed by rubber vulcanization bonding.

At the lower end of the rubber layer unit A, a cup-shaped casing 31 which forms a sealed space between the rubber layer unit 24 and the rubber layer 24 in a joined state is assembled. Screws 32a and 32b penetrating from the upper surface to the lower surface are attached to the bottom of the casing 31 for fixing to a vibrating object (not shown) or a supporting member of the object.

An annular step 31a is formed on the peripheral edge of the upper end of the casing 31, and the casing 3 is provided on the step 31a.
A diaphragm 33 as a separating means (separating membrane) and a partition plate 3 as a partition member so as to face the bottom surface
4 and 35 are placed in this order, and their peripheral edges are air-tight and liquid-tight on the annular step portion 31a of the casing 31 by caulking the lower peripheral edge of the lower side frame 25 of the rubber layer unit A. Fixed.

The diaphragm 33 is configured to be deformable,
The closed space formed by the rubber layer 24 and the casing 31 is partitioned into an oil chamber and a gas chamber R1. A spring 36 supported at both ends by the casing 31 and the diaphragm 33 is housed in the gas chamber R1, and the spring 36 urges the diaphragm 33 upward in FIG. In this embodiment, air is sealed in the gas chamber R1, but another gas may be sealed.

The partition plates 34 and 35 are formed by flat plates in a dish shape, and divide the oil chamber into first and second oil chambers R2 and R3. Small holes 34a, 35a are formed at appropriate places in the partition plates 34, 35, and the small holes 34a, 35a are formed.
“a” forms an orifice with the oil passage R4 formed between the partition plates 34 and 35. In addition, these 1st and 2nd
Hydraulic oil is sealed in the oil chambers R2, R3 and the oil passage R4.

In manufacturing the anti-vibration support device having the above-described structure, the rubber layer unit A including the fixing frame 21, the rubber layer 24, the side frame 25 and the like shown in FIG. Hydraulic oil is put into the concave portion of the rubber layer 24 forming the oil chamber R2, the partition plate 35 is placed thereon, and hydraulic oil is again put into the concave portion of the partition plate 35 forming the oil passage R4. The partition plate 34 is placed on the upper portion, and the operating oil is again supplied to the concave portion of the partition plate 34 constituting the second oil chamber R3. After that, the diaphragm 33 is placed on the partition plate 34, and the casing 31 is placed thereon with the spring 36 placed thereon, so that the diaphragm 33 and the partition plate 3
4 and 35, the rubber layer 24 and the annular step 31 of the casing 31
a, the lower end peripheral edge of the side frame 25 is swaged over the entire circumference to the annular step portion 31a.

When using the anti-vibration support device manufactured in this manner, the fixing frame 21 is fixed to a vibrating object (not shown) and one of the supporting members for supporting the object by screws 22 and the casing 31 is fixed to the casing 31. The other of the object and the support member is fixed by screws 32a and 32b. In such a state, when a large load is applied between the fixing frame 21 and the bottom surface of the casing 31 or when the application of the load is released, the rubber layer 24 is elastically deformed, and the spring 36 contracts and expands. Since the air in the gas chamber R1 is compressed and expanded, the vibrating object is elastically supported by the support member.

On the other hand, with the deformation of the rubber layer 24, the contraction / extension of the spring 36, and the compression / expansion of the gas chamber R1, the volume of the gas chamber R1 changes and the diaphragm 33 is displaced in the axial direction. And the second oil chamber R2, R
The volume of 3 changes. Due to this volume change, the first oil chamber R
2 is provided with small holes 34 provided in the partition plates 34, 35.
a, 35a and the oil passage R4, flows into the second oil chamber R3, and the hydraulic oil in the second oil chamber R3 is filled with the small holes 34a, 35a.
a, and flows into the first oil chamber R2 via the oil passage R4. In this case, the small holes 34 provided in the partition plates 34, 35
The a, 35a and the oil passage R4 act as a flow resistance of the operating oil, that is, an orifice, so that a damping force is applied to the vibration of the object supported by the vibration isolating support device, and the vibration is generated by the orifice. Decay.

According to the above embodiment, since the spring constant of the spring 36 is related to the vibration characteristics such as the spring constant of the whole vibration isolator, by selecting a spring having a different spring constant as the spring 36, Vibration characteristics, such as a spring constant, of the whole vibration isolation support device are changed. Therefore, the vibration characteristics such as the spring constant of the vibration isolation support device can be easily and variously changed. b. Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows a vibration isolating support device according to the same embodiment in a front sectional view.

The anti-vibration support device according to the second embodiment includes:
In addition to the rubber layer unit A of the first embodiment, a casing 31, a diaphragm 33, partition plates 34 and 35, and a spring 36 are unitized as a damper unit B. For this reason, in the second embodiment, the peripheral edge of the upper end of the casing 31 is
The diaphragm 33 and the peripheral portions of the partition plates 34 and 35 are sandwiched between the diaphragm 1 and the peripheral portion of the partition plate 35 in an air-tight and liquid-tight manner. And the casing 3
An annular lower end of the side frame 25 of the rubber layer unit A is air-tightly and liquid-tightly fixed to the upper end caulking portion 1 by air-tight and liquid-tight.

In the manufacture of this anti-vibration support device, FIG.
As shown in (A), rubber is integrally vulcanized and bonded to a fixing frame 21 and a side frame 25 in which a screw 22 and an upper frame 23 are assembled, and the fixing frame 21, the rubber layer 24, and the side frame 25 is manufactured. In this state, the side frame 25
Is in a state of extending linearly downward.

Independently of the manufacture of the rubber layer unit A, as shown in FIG.
Of the diaphragm 33 and the partition plate 3 on the annular step portion 31a.
4 and 35 are placed in this order. And the diaphragm 3
The upper edge of the casing 31 is swaged over the entire edge of the partition 3 and the partition plates 34 and 35. This allows
The damper unit B is manufactured.

Next, hydraulic oil is injected into the second oil chamber R3 and the oil passage R4 using an injector having a thin inlet such as a syringe. Then, both the damper unit B and the manufactured rubber layer unit A are attached to an oil tank, and the lower end of the side frame 25 is swaged to the annular step 31a of the casing 31 in the oil tank. As a result, the first oil chamber R2 is automatically filled with the hydraulic oil in the oil tank.

The anti-vibration support device according to the second embodiment thus configured operates in the same manner as the anti-vibration support device according to the above-described first embodiment, and elastically supports a vibrating object. The same vibration is attenuated. Also in this case, the vibration characteristics of the vibration isolating support device are changed by appropriately selecting the spring constant of the spring 36, so that the vibration characteristics such as the spring constant of the vibration isolating support device can be easily and variously changed. become.

Further, in the second embodiment, since the damper unit B is formed separately from the rubber layer unit A, only the damper unit B is immersed in the liquid tank before the units A and B are combined. By examining whether or not gas leaks from the upper end caulking portion of the casing 31, it is possible to inspect the airtightness of the gas chamber R1. If the gas tightness of the gas chamber R1 is not maintained according to the inspection result, another damper unit B may be used, or only the unit B may be adjusted and reassembled. Therefore, in the second embodiment, the anti-vibration support device includes the rubber layer unit A and the damper unit B separately.
Inspection of the airtightness of the gas chamber R1 is simplified, and the inspection result can be easily dealt with. c. Third Embodiment Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 4 shows a vibration isolating support device according to the third embodiment in a front sectional view.

The anti-vibration support device according to the third embodiment includes:
This is a modification of the damper unit B of the second embodiment, and includes a cup-shaped casing 41 that is configured to be longer in the axial direction than the above-described casing 31. In addition,
The casing 41 is fixed to a vibrating object or a support of the object by a bracket (not shown) fixed to the casing 41 by welding or the like. An annular step portion 41 a is formed on the peripheral edge of the upper end of the casing 41.
A diaphragm 42 as a separating means (separating film) and a partition plate 43 as a partition member are mounted on the partitioning member a.
In a state sandwiched on the first annular step 31a, the same annular step 41
a is airtightly and liquidtightly caulked.

The point that the concave portion of the casing 41 located below the diaphragm 42 is formed in the gas chamber R1, the point that the first oil chamber R2 is formed between the rubber layer 24 and the partition plate 43, and the partition The point that the second oil chamber R3 is formed between the plate 43 and the diaphragm 42 is the same as in the first and second embodiments.

A hole is formed in the center of the diaphragm 42, and a cylindrical holder 44 having a flange at the upper end is inserted into the hole from above. Diaphragm 42
An annular retainer 45 having the column portion of the holder 44 penetrated is attached to the lower surface of the holder 44. A spring 4 is provided between the lower surface of the retainer 45 and the bottom surface of the casing 41.
6, the spring 46 urges the diaphragm 42, the holder 44 and the retainer 45 upward in the figure. A screw 47 that penetrates the center of the bottom of the casing 41 so as to be able to advance and retreat is screwed into the lower end surface of the holder 44, and the urging force of the spring 46 with respect to the diaphragm 42 is adjusted by the screw 47. I have.
An O-ring 48 is interposed between the head 47a of the screw 47 and the casing 41 to ensure the gas chamber R1 is airtight.

A hole is formed in the center of the partition plate 43,
A cylindrical holder 51 is assembled in the hole in a liquid-tight manner. A cylindrical orifice member 52 is press-fitted and fixed on the inner peripheral surface of the holder 51, and the orifice member 52 is a flow path for hydraulic oil flowing between the first oil chamber R2 and the second oil chamber R3. It functions as an orifice by providing resistance.

In the manufacture of the vibration isolating support device, the rubber layer unit A shown in FIG. 5A and the damper unit B shown in FIG. Then, both units A and B are combined. The production of the rubber layer unit A is the same as that of the first embodiment. In manufacturing the damper unit B, the spring 46 is housed in the casing 41,
With the diaphragm 42 and the retainer 45 attached to the holder 44, the peripheral edge of the diaphragm 42 is placed on the annular step 41 a of the casing 41, and the tip of the screw 47 is attached with the O-ring 48 attached to the screw 47. Holder 4
Screw into 5. After that, the damper unit B is assembled by caulking the peripheral end of the partition plate 43 to which the holder 51 and the orifice member 52 are assembled with the annular step portion 41a of the casing 41 with the peripheral edge of the diaphragm 42 interposed therebetween.

Next, hydraulic oil is injected into the second oil chamber R3 through the orifice member 52 using an injector having a thin injection port such as a syringe, and this damper unit B and FIG.
The rubber layer unit A configured as shown in (A) is attached to a hydraulic oil tank, and the lower end of the side frame 27 is swaged on the peripheral end of the partition plate 41 in the oil tank. Therefore,
The first oil chamber R2 is automatically filled with hydraulic oil in the oil tank.

As a result, the anti-vibration support device according to the third embodiment configured as described above operates similarly to the above-described first and second anti-vibration support devices, and elastically supports a vibrating object. At the same time, the vibration is attenuated by the hydraulic oil passing through the orifice member 52. And also in this case,
By appropriately selecting the spring constant of the spring 46, the vibration characteristics of the anti-vibration support device are changed, so that the vibration characteristics such as the spring constant of the anti-vibration support device can be easily and variously changed. Also, in the third embodiment, the rubber layer unit A and the damper unit B are configured separately, so that the inspection of the airtightness of the gas chamber R1 is simplified as in the case of the second embodiment. At the same time, the test results can be easily dealt with.

Further, in this case, by selecting a cylindrical orifice member 52 having a different inner diameter and length as the cylindrical orifice member 52 which is press-fitted and fixed to the holder 51, the damping characteristic can be easily changed.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an anti-vibration support device according to a first embodiment of the present invention.

FIG. 2 is a front sectional view of an anti-vibration support device according to a second embodiment of the present invention.

3A is a front sectional view of the rubber layer unit of FIG. 2, and FIG. 3B is a front sectional view of the damper unit of FIG.

FIG. 4 is a front sectional view of an anti-vibration support device according to a third embodiment of the present invention.

5A is a front sectional view of the rubber layer unit of FIG. 4, and FIG. 5B is a front sectional view of the damper unit of FIG.

FIG. 6 is a front sectional view of a conventional anti-vibration support device.

[Explanation of symbols]

R1: gas chamber, R2, R3: oil chamber, R4: oil path, A: rubber layer unit, B: damper unit, 21: fixing frame, 24: rubber layer, 25: side frame, 31, 41
... Casing, 33, 42 ... Diaphragm, 34, 3
5, 43: partition plate, 34a, 35a: small hole, 36, 4
6 ... spring, 44 ... holder, 47 ... screw, 51 ... holder, 52 ... orifice member.

Claims (1)

[Claims] A rubber layer having a concave portion on the lower surface and adhered to the lower surface of the fixing frame; and a rubber layer formed in a cup shape and having an upper peripheral edge joined to a lower end of the rubber layer. A deformation forming a sealed space between the rubber layer and the casing, the deformation being provided between the rubber layer and the casing so as to face a bottom surface of the casing, and dividing the sealed space into an oil chamber and a gas chamber. A partition which is provided between the rubber layer and the separator and partitions the oil chamber into first and second oil chambers and forms an orifice between the first and second oil chambers; A vibration-damping support device comprising a member, and a spring housed in the gas chamber and having both ends supported by the separator and the casing.