JP2000088033A - Vibrationproof supporting device and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply inspect the air-tightness of a gas chamber of a vibrationproof supporting device and reduce the labor to make reassembly of the supporting device to be performed in case the air-tightness is poorly established. SOLUTION: This vibrationproof supporting device is composed of a rubber layer unit A and a damper unit B, wherein the rubber layer unit A is formed consolidatedly by adhering in vulcanization a rubber layer 24 to a fixing frame 21 and a side frame 25. The damper unit B is formed independently of the rubber layer unit A by means of caulking the top periphery of the casing 31 onto a ring-shaped step part 31a of the casing 31 upon placing a diaphragm 33 and partitioning plates 34 and 35 on the step part 31a. The bottom of the side frame 25 is caulked to the peripheral edge of the damper unit B. Before the two units A and B are consolidated, the unit B in the single piece condition is immersed in a liquid chamber for inspecting the air-tightness on the basis of whether or not bubbles are generated.

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 method of manufacturing an anti-vibration support device that elastically supports and suppresses vibration of an object, and an anti-vibration support device manufactured by the method.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a rubber layer 12 fixed to the lower surface of a fixing frame 11 is formed, a concave portion is formed on the lower surface of the rubber layer 12, and a side frame 13 is formed on the side surface. A casing 14 forming a closed space between the rubber layer 12 and the rubber layer 12 in a state in which the upper edge is joined to the lower end of the rubber layer 12 and the upper edge is joined to the lower end of the rubber layer 12. A deformable isolation film 15 provided between the rubber layer 12 and the casing 14 so as to face the bottom surface of the casing 14 to partition the sealed space into an oil chamber and a gas chamber R1; Between the first and second oil chambers R1 and R2.
An anti-vibration support device including partition members 16 and 17 forming an orifice between the first and second oil chambers is known. In the manufacture of the anti-vibration support device, the rubber layer unit A is turned upside down as shown in the figure, and hydraulic oil is put into the concave portion, and the partition plates 16 and 17 are placed on the rubber layer unit A while putting the hydraulic oil. At the same time, the separator 15 is placed thereon, and finally the casing 14 is placed, and the lower end of the side frame 13 is swaged to the annular step 14a of the casing 14. In addition, the partition plates 16 and 17 and the separator 15 are placed on the rubber layer unit A in the oil tank, and the lower end of the side frame 13 is swaged with air remaining in the recess of the casing 14. In some cases, the operation was performed in an oil tank.

[0003]

However, in the above-described conventional method of manufacturing a vibration-proof supporting device, it is determined whether or not the lower end of the side frame 13 is properly caulked to ensure the airtightness of the gas chamber R1. In order to check whether or not the bubble is generated, the whole of the anti-vibration support device manufactured as described above is immersed in a liquid tank to determine whether or not bubbles are generated. However, after all the components have been assembled in this way, bubbles may be accumulated in the depressions of the rubber layer unit A,
There is a problem that the airtightness test is not performed well. In addition, as for the anti-vibration support device that is determined to be not airtight as a result of the inspection, it is necessary to discard the entire device or disassemble and reassemble the device again. There has been a problem that the device is wasted or it takes time.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to address the above problems, and has as its object to provide an apparatus for simply checking the airtightness of a gas chamber and for maintaining the airtightness when the airtightness is not maintained. It is an object of the present invention to provide a method of manufacturing an anti-vibration support device and a method of manufacturing the anti-vibration support device manufactured by the method, which reduces waste of time and labor of fine assembly.

A feature of the present invention is a rubber layer unit having a rubber layer fixed to the lower surface of a fixing frame, a concave portion formed on the lower surface of the rubber layer, and a side frame fixed to the side surface. Independently, there is provided a method for manufacturing an anti-vibration support device in which a damper unit is assembled by assembling a separator and a partition member to a casing, and a side frame of a rubber layer unit is assembled to a peripheral portion of the assembled damper unit. . There is also a vibration-proof support device manufactured by the same method.

[0006] By adopting the manufacturing method as described above, the inspection of the airtightness of the gas chamber formed between the casing of the damper unit and the separator is performed by immersing only the damper unit in the liquid tank. This can be performed by determining the presence / absence of air bubbles from the damper unit. In this case, since the rubber layer unit is not assembled to the damper unit, there is no influence of the recess existing in the rubber layer unit, and the inspection of the airtightness can be performed simply and well. Also, as a result of the inspection, even when it is determined that the airtightness is not maintained, only the damper unit may be discarded or the unit may be reassembled, so that waste of parts can be minimized. Also, even in the case of reassembly, the trouble of the reassembly can be minimized.

[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.

[0008] This vibration isolating support device is composed of a rubber layer unit A and a damper unit B. 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
On the lower surface of the upper frame 23, a rubber layer 24 as an elastic member having a concave portion formed in the center of the lower surface is fixed,
A side frame 25 formed in a truncated cone shape with the upper and lower portions opened is fixed to the side surface of the rubber layer 24.
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.

The damper unit B has a casing 31 which is formed in a cup shape with a bottom and forms a closed space between the rubber layer 24 and the upper peripheral edge joined to the lower end of the rubber layer unit A. ing. At the bottom of the casing 31, screws 32a penetrating from the upper surface to the lower surface for fixing to a vibrating object (not shown) or a support member of the object are provided.
32b is assembled. An annular stepped portion 31a is formed on the peripheral edge of the upper end of the casing 31. On the annular stepped portion 31a, a diaphragm 33 as isolation means (isolation film) and a partition plate 3 are provided so as to face the bottom surface of the casing 31.
4 and 35 are placed in this order, and their peripheral portions are air-tightly and liquid-tightly fixed on the annular step portion 31 a of the casing 31 by caulking the upper peripheral edge of the casing 31. The annular lower end portion of the side frame 25 of the rubber layer unit A is swaged and fixed to the upper end swaged portion of the casing 31.

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. In the gas chamber R1, the casing 31 and the diaphragm 3
3 accommodates springs 36 supported at both ends, and the springs 36 urge 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 constitute a partition member having a flat plate-like shape, and divide the oil chamber into first and second oil chambers R2 and R3. Partition plates 34, 35
Are formed with small holes 34a, 35a at appropriate locations. The small holes 34a, 35a form an orifice together with an oil passage R4 formed between the partition plates 34, 35. The first and second oil chambers R2 and R3 and the oil passage R4 are filled with hydraulic oil.

In the manufacture of this vibration isolating support device, first, as shown in FIG. 2A, rubber is integrally applied to a fixing frame 21 and a side frame 25 to which a screw 22 and an upper frame 23 are assembled. Fixing frame 2 with sulfuric acid
1. A rubber layer unit A including a rubber layer 24, a side frame 25 and the like is manufactured. In this state, the lower end of the side frame 25 is linearly extended downward.

Independently of the production 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.

In this state, if the damper unit B is immersed in the liquid tank and the bottom portion of the casing 31 is pressed to generate air bubbles from the caulked portion at the upper end of the casing 31, it is determined whether the caulking is good. No, that is, whether or not the airtightness of the gas chamber R1 is ensured. As a result of this inspection, the damper unit B that is determined not to have airtightness is discarded, re-swaged, and reassembled.

Next, hydraulic oil is injected into the second oil chamber R3 and the oil passage R4 of the damper unit B determined to be normal by 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 placed in the oil tank in the annular step portion 3 of the casing 31.
1a. As a result, the first oil chamber R2 is automatically filled with the hydraulic oil in the oil tank.

In the anti-vibration support device manufactured as described above, the airtightness of the gas chamber R1 of the damper unit B before the rubber layer unit A and the damper unit B are united before the unit is assembled. Inspection, rubber layer unit A
The airtightness is easily and satisfactorily inspected because there is no influence such as generation of air bubbles due to the dents existing in the airtightness. In addition, even if it is determined that the airtightness is not maintained as a result of the inspection, only the damper unit B may be discarded, or the unit B may be re-adjusted or reassembled, thereby minimizing waste of parts. As well as readjustment,
Even in the case of reassembly, the trouble can be minimized.

When using the anti-vibration support device thus configured, 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 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, the deformation of the rubber layer 24 and the spring 36
With the contraction / extension of the gas chamber R1 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 volumes of the first and second oil chambers R2 and R3 change. Due to this volume change, the hydraulic oil in the first oil chamber R2 is supplied to the small holes 34a, 35a provided in the partition plates 34, 35.
And the oil in the second oil chamber R3 flows through the small holes 34a and 35a and the oil passage R
4 and flows into the first oil chamber R2. In this case, the small holes 34a, 35a provided in the partition plates 34, 35
The oil passage R4 functions as a flow passage resistance of the hydraulic oil, that is, an orifice, so that a damping force is applied to the vibration of the object supported by the vibration isolation support device, and the vibration is attenuated by the orifice.

Further, according to the first embodiment, since the spring constant of the spring 36 is related to the vibration characteristics such as the spring constant of the whole anti-vibration support device, a spring having a different spring constant is selected as the spring 36. Thereby, the vibration characteristics such as the spring constant of the whole vibration isolating support device are changed.
Further, the spring 36 may be omitted, and the diaphragm 33 may be urged toward the partition plates 34 and 35 by the pressure of the gas chamber R1. b. Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 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 comprises:
This is a modification of the damper unit B of the first embodiment, and includes a cup-shaped casing 41 that is configured to be longer in the axial direction than the casing 31 described above. 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 41a is formed at the peripheral edge of the upper end of the casing 41, and the step portion 41a
A diaphragm 42 as a separating means (separating film) and a partition plate 43 as a partition member are placed on the lower surface of the casing 41 so as to oppose the bottom surface of the casing 41, and the periphery of the partition plate 43 is annular with the diaphragm 42 interposed therebetween. It is crimped air-tight and liquid-tight on the outer periphery of the step portion 41a.

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 embodiment.

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 cylindrical portion of the holder 44 penetrated therethrough is attached to the lower surface of the holder 44. A spring 46 is interposed between the lower surface of the retainer 45 and the bottom surface of the casing 41, and urges the retainer 45, the diaphragm 42, and the holder 44 upward in the drawing. A screw 47 is screwed into the lower end surface of the holder 44 so as to advance and retreat through the center of the bottom surface of the casing 41.
The screw 47 is provided with a spring 46 for the diaphragm 42.
Can be adjusted. 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. 4A 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. Thereafter, 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 attached, with the annular step 41a of the casing 41 sandwiching the peripheral edge of the diaphragm 42.

In this state, if the damper unit B is immersed in the liquid tank and the bottom portion of the casing 41 is pressed so that air bubbles come out from the upper end caulking portion of the casing 41, whether the caulking is good or not is determined. No, that is, whether or not the airtightness of the gas chamber R1 is ensured. Also in this case, regarding the damper unit B determined to be not airtight by the inspection, it is discarded or
Perform re-swaging and re-assembly.

Next, hydraulic oil is injected into the second oil chamber R3 of the damper unit B determined to be normal using the above-described injector. 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 on the caulking portion at the lower end of the partition plate 43 in the oil tank. As a result, the first oil chamber R2
Is automatically filled with hydraulic oil in the oil tank.

In the anti-vibration support device manufactured in this manner, similarly to the first embodiment, the rubber layer unit A
Before combining the damper unit B with the damper unit B, the airtightness of the gas chamber R1 of the unit B can be inspected in a single state of the damper unit B, so that the airtightness inspection can be performed easily and favorably. Also, as a result of the inspection, even if it is determined that the airtightness is not maintained, the waste of parts can be minimized, and readjustment and reassembly can be performed, as in the case of the first embodiment. And the like can be minimized.

In using the anti-vibration support device thus configured, the fixing frame 21 is fixed to a vibrating object (not shown) and one of the supporting members supporting the object by screws 22 and the casing 41 is fixed to the above-mentioned case. It is fixed to the other of the object and the support member via a bracket (not shown) or the like. In this embodiment as well, the device operates in the same manner as the vibration isolating support device according to the above-described first embodiment, elastically supports the vibrating object, and performs the vibration by the hydraulic oil passing through the orifice member 52. Decay. Also in this case, the vibration characteristics of the vibration isolating support device are changed by appropriately selecting the spring constant of the spring 46, and the spring 46 may be omitted.

Further, in this case, by selecting the orifice member 52 having a different inner diameter and length as the orifice member 52 press-fitted and fixed to the holder 51, the above-mentioned damping characteristics 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.

2A is a front sectional view of the rubber layer unit of FIG. 1, and FIG. 2B is a front sectional view of the damper unit of FIG.

FIG. 3 is a front sectional view of an anti-vibration support device according to a second embodiment of the present invention.

4A is a front sectional view of the rubber layer unit of FIG. 3, and FIG. 4B is a front sectional view of the damper unit of FIG.

FIG. 5 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, 51: holder, 52: orifice member.

Claims (2)

[Claims] 1. A rubber layer unit having a rubber layer adhered to a lower surface of a fixing frame, a concave portion formed on the lower surface of the rubber layer, and a side frame fixed to a side surface, and formed into a cup shape. A casing that forms a sealed space between the rubber layer and the upper end peripheral edge joined to the lower end of the rubber layer unit, and faces a bottom surface of the casing between the rubber layer and the casing. And a deformable isolation film that divides the sealed space into an oil chamber and a gas chamber, and is provided between the rubber layer and the isolation film so that the oil chamber is first and second. A method for manufacturing an anti-vibration support device, comprising a partition member that partitions into an oil chamber and forms an orifice between the first and second oil chambers, wherein the partition member is separated from the rubber layer unit by the casing. Assemble membrane and partition member A damper unit is assembled, and a side frame of the rubber layer unit is assembled to a peripheral portion of the assembled damper unit. 2. A rubber layer unit having a rubber layer adhered to a lower surface of a fixing frame, a concave portion formed on the lower surface of the rubber layer, and a side frame fixed to a side surface, and formed into a cup shape. A casing that forms a sealed space between the rubber layer and the upper end peripheral edge joined to the lower end of the rubber layer unit, and faces a bottom surface of the casing between the rubber layer and the casing. And a deformable isolation film that divides the sealed space into an oil chamber and a gas chamber, and is provided between the rubber layer and the isolation film so that the oil chamber is first and second. A partition member that partitions the oil chamber and forms an orifice between the first and second oil chambers, wherein the casing is provided with an insulating film and a partition member independently of the rubber layer unit. Assemble and damper An anti-vibration support device comprising: assembling a unit; and manufacturing the damper unit by assembling a side frame of the rubber layer unit around a periphery of the assembled damper unit.