JP2000088034A - Vibrationproof supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply change the damping force 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 32 and a partitioning plate 33 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. A cylindrical orifice 42 is fitted by pressing on the partitioning plate 33 firmly, and the frame 21 and casing 31 are fixed to an object vibrating or a support therefor. This vibrationproof supporting device supports the object resiliently and gives a damping force to the object vibrating, wherein the damping force characteristic of the device can be changed only through selecting the orifice member 42 properly.

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. 3, a rubber layer 12 having a concave portion on the lower surface and adhered to the lower surface of a fixing frame 11, and a rubber layer formed in a cup shape and having a peripheral edge at an upper end thereof. 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. 14, small holes 15a, 16a for dividing the oil chamber into first and second oil chambers R2, R3 and forming orifices between the first and second oil chambers R2, R3. The anti-vibration support device including the partition plates 15 and 16 having the following is well known.

[0003]

However, in the above-mentioned conventional anti-vibration support device, the damping force for attenuating the vibration of the object fixed to the fixing frame 11 or the casing 13 is provided on the partition plates 15 and 16. Small holes 15a, 16a
And the oil passage formed between the partition plates 15 and 16, and changing the characteristics of the damping force is equivalent to replacing the partition plates 15 and 16. was difficult.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an anti-vibration support device in which the characteristics of a damping force can be easily and variously changed.

According to the present invention, there is provided an orifice in which the first and second oil chambers are communicated with a partition plate for partitioning the oil chamber in the conventional vibration isolating support device into first and second oil chambers, and an orifice is formed. I have assembled the members.

In the present invention configured as described above,
The orifice member is assembled to the partition plate, and it is relatively easy to replace the orifice member with an orifice member having different characteristics. Therefore, according to the present invention, the characteristics of the damping force of the vibration isolation support device can be easily and easily changed in various ways.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below 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 the upper open end side. Fixing frame 2
A rubber layer 24 as an elastic member having a recess formed in the center of the lower surface is fixed to the lower surface of the upper frame 1 and the upper frame 23. The upper and lower sides of the rubber layer 24 are opened upward and downward to form a truncated cone. The side frame 25 is fixed. These fixing frame 21, upper frame 23,
The rubber layer unit A including the rubber layer 24, the side frame 25, and the like is formed integrally by vulcanization bonding of rubber.

The damper unit B has a casing 31 which is formed in a cup shape with a bottom and forms a sealed space between the rubber layer 24 and the upper end peripheral edge portion joined to the lower end portion of the rubber layer unit A. Have. A bracket (not shown) or the like is fixed to the casing 31, and the casing 31 is fixed to a vibrating object or a supporting member of the object via the bracket. Casing 3
An annular stepped portion 31a is formed on the peripheral edge of the upper end of the diaphragm 1, and a diaphragm 3 as an isolating means (separating film) is formed on the stepped portion 31a.
2 and the partition plate 33 are placed so as to face the bottom surface of the casing 31, and the peripheral edge of the partition plate 33 is air-tightly and liquid-tightly caulked to the annular step portion 31 a with the diaphragm 32 interposed therebetween. . Further, the annular lower end of the side frame 25 of the rubber layer unit A is air-tightly and liquid-tightly fixed to the caulking portion of the partition plate 33.

The diaphragm 32 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 hole is formed in the center of the diaphragm 32, and a cylindrical holder 34 having a flange at the upper end is inserted into the hole from above. On the lower surface of the diaphragm 32, an annular retainer 35 that penetrates the cylindrical portion of the holder 34 is attached. Lower surface of retainer 35 and casing 31
A spring 36 is interposed between the bottom and
The spring 36 includes a retainer 35 and a diaphragm 32.
And the holder 34 are urged upward in the figure. Holder 34
A screw 37 that penetrates the center of the bottom surface of the casing 31 so as to be able to advance and retreat is screwed into the lower end surface of the casing 31, and the urging force of the spring 36 against the diaphragm 32 is adjusted by the screw 37. Head 37a of screw 37
An O-ring 38 is interposed between the gas chamber R1 and the casing 31 to ensure airtightness of the gas chamber R1.

The partition plate 33 is formed by flat plate-shaped plate, and the divided oil chambers are further divided into first and second oil chambers R2 and R2.
Partitioned into R3. These oil chambers R2, R3
Are filled with hydraulic oil. A hole is formed in the center of the partition plate 33, and a cylindrical holder 41 is assembled in the hole in a liquid-tight manner. On the inner peripheral surface of the holder 41, a cylindrical orifice member 42 is press-fitted and fixed, and the orifice member 42 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 this anti-vibration support device, FIG.
After the rubber layer unit A shown in FIG. 2A and the damper unit B shown in FIG.
Is united. Regarding the manufacture of the rubber layer unit A, rubber is integrally vulcanized and bonded to the fixing frame 21 and the side frame 25 to which the screw 22 and the upper frame 23 are assembled, and the fixing frame 21, the rubber layer 24, the side Frame 2
5 is manufactured. In this state, the lower end of the side frame 25 is linearly extended downward.

With respect to the manufacture of the damper unit B, FIG.
As shown in FIG.
While the diaphragm 32 and the retainer 35 are assembled to the holder 34, the diaphragm 3
2 is placed on the annular step portion 31 a of the casing 31, and the tip of the screw 37 is screwed to the holder 34 with the O-ring 38 attached to the screw 37. Thereafter, the partition plate 3 in which the holder 41 and the orifice member 42 are assembled
The damper unit B is assembled by caulking the peripheral end of 3 to the annular step 31a of the casing 31 with the peripheral edge of the diaphragm 32 interposed therebetween.

In this state, if the damper unit B is immersed in the liquid tank and the bottom portion of the casing 31 is pressed so that bubbles come out from the caulked portion by the partition plate 33, whether or not the caulking is good is determined. , That is, the gas chamber R1
It is checked whether the airtightness is secured. 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 rubber layer unit A manufactured as described above are attached to an oil tank, and the lower end of the side frame 25 is air-tightly and liquid-tightly connected to the caulking portion by the partition plate 33 in the oil tank. Close. Thereby, the inside of the first oil chamber R1 is also automatically filled with the hydraulic oil.

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 can be performed. In the inspection, the airtightness is easily and satisfactorily inspected because the inspection is not affected by the generation of bubbles due to the dents and the like existing in the rubber layer unit A. 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. In addition to the above, it is possible to minimize the time and effort for readjustment and reassembly.

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 It is fixed to the other of the object and the support member via a bracket. 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 32 also displaces 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 through the orifice member 42 to the second oil chamber R
3 or the hydraulic oil in the second oil chamber R3 flows into the first oil chamber R2 via the orifice member 42. In this case, since the orifice member 42 acts as a resistance to the flow of the hydraulic oil, that is, acts as an orifice, 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 embodiment constructed as described above, the damping characteristic can be easily changed by selecting a cylindrical orifice member 42 having a different inner diameter and length as the cylindrical orifice member 42 press-fitted and fixed to the holder 41. Can be. Therefore, according to the anti-vibration support device according to the present embodiment, the characteristics of the damping force can be easily and variously changed.

Further, according to this 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, by selecting a spring having a different spring constant as the spring 36, Vibration characteristics such as a spring constant of the whole vibration isolator are easily and variously changed.

In the above embodiment, when the damper unit B is manufactured, the partition plate 33 is folded back and swaged to the annular step portion 31a of the casing 31. 31a is a partition plate 3
3 may be crimped on the peripheral portion.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an anti-vibration support device according to an 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 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 casing, 32 ... diaphragm, 33 ... partition plate, 34 ...
Holder, 36: Spring, 37: Screw, 38: O-ring, 41: Holder, 42: 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 vibration-isolating support device comprising: a possible separator; and a partition provided between the rubber layer and the separator to partition the oil chamber into first and second oil chambers. An anti-vibration support device, wherein an orifice member that connects the first and second oil chambers and forms an orifice is assembled.