JPH1137207A - Liquid-sealed mount and rolling stock axle-box suspension using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid-sealed mount which displays high damping characteristics in the total frequency range including a low frequency range and a rolling stock axle-box suspension which is improved in maintainability by utilizing the liquid-sealed mount. SOLUTION: A supporting shaft 4 penetrates the center of a case 1, while the space between the top end of the supporting shaft 4 and the top end of the case 1 is sealed with a flexible sealing lid 5 to the water tight. The space between the bottom part of the case 1 and the bottom part of the supporting shaft 4 is held watertight by a layered mount 6 formed by laminating a plurality of cylindrical mount rubbers and cylindrical mount plates 6b. In addition, a damping plate 8, which is within the watertight chamber thus formed and which is provided with a gap 8a formed between the inner peripheral surface of the case 1 and the plate 8 is installed in the intermediate part of the supporting shaft 4. On the other hand, a pair of damping plates 9, which are provided with a gap 9a between it and the supporting shaft 4, are installed in both top and bottom of the inner peripheral surface of the case 1, with the damping plates 8 installed in the supporting shaft 4 between in order to form a liquid-sealed mount. The rolling stock axle-box suspension utilizes the liquid-sealed mount thus formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled mount having high damping characteristics over a wide range of vibration frequencies including a low frequency range, and an axle box for a railway vehicle equipped with the liquid-filled mount as a damping device in a shaft spring. It relates to a support device.

[0002]

2. Description of the Related Art There are various types of conventional liquid-filled mounts. Among them, one having excellent vibration proof properties against vibrations in middle and high frequencies is disclosed, for example, in Japanese Patent Application Laid-Open No. 6-25763.
No. 8 has proposed a liquid-filled rubber mount.

As shown in FIG. 6, the liquid-filled mount is provided with a laminated mount 32 in which a mount rubber and a mount plate are laminated between a case 30 and a guide rod 31 inserted at the center thereof. The liquid filling chamber 33 is joined to the lower end, and a stopper plate 34 is provided along the lower edge of the case. On the other hand, the damper plate 35 is fitted to a bolt 36 projecting from the lower end of the guide rod 31 and fastened by a nut. A plurality of small holes 37 are provided in the damper plate 35, and a rubber stopper 39 is attached to the periphery.
A gap 38 is formed between the liquid filling chamber 33 and the inner periphery. A high viscosity liquid is sealed in the liquid sealing chamber 33.

According to this device, the case 30 and the guide rod 3
When 1 is relatively displaced in the vertical direction, the damper plate 35 agitates the liquid in the liquid filling chamber 33, so that a large damping force is obtained. Fig. 10 (b) shows how to achieve excellent vibration isolation in the middle and high frequency range by using this liquid-filled mount.
Damping coefficient C ₂ for vertically oscillating as shown in the 2
At 6 kgf · sec / mm, the dynamic spring constant K ₂ must satisfy the condition of 200 to 400 kg / mm as shown in FIG.

As means for attenuating vertical vibration in a railway vehicle, a spring system of a shaft spring is usually used, but in a high-speed vehicle, a shaft damper 28 is attached to the shaft spring as shown in FIG. Is attached. That is, in the figure, a shaft spring 25 is mounted between a spring seat 29 of a support frame 24 provided at an end of a side beam 23 of a bogie frame and a spring seat 26 provided on an axle box 22, and a special spring is provided in the shaft spring. The link type axle box support device is provided with a rubber 42 and connected between the side beam 23 and the side surface of the axle box 22 by the link device 21. Between the tip of the side beam 23 and the side surface of the axle box 22 is provided. A shaft damper 28 is provided.

[0006] By installing the shaft damper 28,
Vibration damping performance sufficient to maintain good ride comfort is exhibited. However, the shaft damper 28 requires periodic disassembly and repair in order to prevent oil leakage and maintain a good damping action. However, since the shaft damper 28 has a complicated configuration in which many parts are combined,
Overhaul takes time and maintenance is poor.

[0007]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 6-257.
The liquid-filled mount disclosed in Japanese Patent No. 638 exhibits an excellent damping effect on vibrations in middle and high frequency ranges, but cannot expect excellent damping performance in all frequency ranges including a low frequency range. Further, if the shaft damper composed of the sealed oil damper is used for the axle box support device of the railway vehicle as described above, it takes a long time for overhaul and the maintenance property is poor.

In view of the above situation, the present invention provides a liquid-filled mount provided with an attenuating performance so as to exhibit high attenuation characteristics in all frequency ranges including a low-frequency range, and a liquid inexpensive liquid as compared with a conventional shaft damper. It is an object of the present invention to provide an axle box support device for a railway vehicle in which an enclosed mount is used and replaced when a failure occurs, thereby improving maintainability of the damping device.

[0009]

In order to achieve the above object, a liquid-filled mount according to the present invention has a support shaft inserted through a shaft center of a case having a mounting flange provided on an upper portion of a cylindrical body, and a support shaft of the case is provided. A laminated mount formed by laminating a plurality of cylindrical mount rubbers and a cylindrical mount plate between the lower part of the case and the lower part of the support shaft, with the flexible seal lid sealing the space between the upper end and the upper end of the case in a watertight manner. And a watertight chamber is formed by the flexible sealing lid and the laminated mount. In the watertight room,
A damping plate having a gap with the inner peripheral surface of the case is attached to an intermediate portion of the support shaft. On the other hand, a pair of damping plates having a gap with the support shaft are mounted above and below the inner peripheral surface of the case with the damper plate mounted on the support shaft interposed therebetween, and a high-viscosity liquid is sealed in the watertight chamber.

In the axle box support device for a railway vehicle, in the axle box support device provided with an axle spring on an upper surface of a axle box or on a wing, the liquid-filled mount is inserted as an attenuating device into an inner space of the axle spring. The flange at the upper end of the case of the liquid-filled mount is mounted on the bogie frame, and the lower end of the support shaft is mounted on the upper surface of the axle box or on the wing.

[0011] Still another axle box support device for a railway vehicle is a shaft beam type axle box support device in which an axle spring is mounted on an upper surface of the axle box and an arm extending from the axle box is connected to a bogie frame. The liquid-filled mount is inserted as a damping device into the internal space of the spring, and the support shaft of the liquid-filled mount is attached to the bogie frame.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a liquid-filled mount according to the present invention comprises a highly viscous liquid 7 sealed in a watertight chamber formed in a case 1 by a flexible sealing lid 5 and a laminated mount 6. Is provided with a pair of upper and lower damping plates 9 attached to the inner peripheral surface of the case 1,
When a vertical vibration acts on this device, the liquid is stirred through the gaps 8a and 9a by the movement of the damping plate 8. At this time, the damping coefficient C ₁ shown in FIG.
By applying the dynamic spring constant K1 shown in ( ₁₎ , high damping performance can be obtained in all frequency ranges including the low frequency range.

A liquid-filled mount having a single damping plate attached to the inner peripheral surface of the case (shown as "one damping plate" in FIGS. 8 and 9) and the case according to the invention of claim 1 of the present application. The damping performance with respect to vibration of a liquid-sealed mount having two damping plates attached to the peripheral surface (shown in FIGS. 8 and 9 as “in the case of two damping plates”) was compared and examined. The result is shown in FIG. 8 when the amplitude is ± 1.0 mm, and the amplitude is ± 2.0 mm.
9 is shown in FIG. From this result, it can be seen that the invention according to the first aspect of the present application has excellent vibration damping performance over the entire frequency range as compared with a single damping plate.

Although the case where one damping plate 9 is provided above and below the damping plate 8 is shown, the damping plate 8 and the damping plate 9 are provided.
Are arranged, a higher damping effect can be obtained.

The liquid-filled mount of the present invention is mounted on the damping device 13.
When provided in the axle box support device, the damping device 13 can be provided in the space inside the shaft spring 20 as shown in the link type axle box support device of FIG. If the rigidity of the laminated mount 6 is appropriately selected in the front-rear and left-right directions, excellent support characteristics can be obtained as a shaft spring supporting device for a railway vehicle in combination with the resiliency of the shaft spring 20, and vibration in the vertical direction is reduced by a damping device. The attenuating plate 8 and the pair of two attenuating plates 9 agitate the highly viscous liquid and the shearing resistance of the laminated mount 6 acts, so that excellent damping performance is obtained and the riding comfort of the vehicle is improved. In addition, even when the shaft spring 20 is pre-compressed after the damping device 13 is mounted in the shaft spring 20, the pre-compression can be easily provided by the presence of the flexible sealing lid 5 of the liquid-filled mount. If the liquid-mounting mount shown in FIG. 6 shown as a prior art example is used as a damping device, the liquid-filling chamber is made of a metal container, so that precompression cannot be applied.

As the high-viscosity liquid, any liquid having a high viscosity and a low temperature dependency can be used, but mainly silicone oil, polyisobutylene oil, polypropylene oil and the like are used. Further, as a result of examining the damping performance of the gap 8a between the damping plate 8 and the inner peripheral surface of the case and the gap 9a between the damping plate 9 and the support shaft 4 by an experiment, it was found that 2 to 9 mm was desirable. Further, in order to exhibit excellent damping performance in all frequency range from the low frequency region to a high frequency range, vertical damping coefficient C ₁ as shown in FIG. 10 (a) 0.5 as a liquid sealed mount 3 kgf · sec / mm, FIG. 11 (a)
The dynamic spring constant K ₁ as shown in, it is necessary to satisfy the condition of 40 to 80 kg / mm. The support rigidity of the axle box support device is set to an appropriate value of 200 to 1
It is desirable to set it to 500 kgf / mm / shaft box.

[0017]

【Example】

Embodiment 1 A liquid filled mount according to an embodiment of the present invention will be described with reference to FIG. In order to attach to a member (not shown), a mounting flange 2 is provided at the upper part of the cylindrical body, and a support shaft 4 is inserted through the shaft center of the case 1 having a stepped portion 3 formed at the upper part of the inner peripheral surface.
Between the upper end of the case 1 and the upper end of the case 1 in a watertight manner with a flexible sealing lid 5 made of, for example, synthetic rubber, and a plurality of cylindrical mount rubbers 6a between the lower part of the case 1 and the lower part of the support shaft 4. In a watertight chamber formed by the flexible sealing lid 5 and the laminated mount 6, a gap 8a is formed between the cylindrical mounting plate 6b and the inner peripheral surface of the case. The supporting damper 8 is attached to the support shaft 4 so as to be located at the center of the watertight chamber, and a pair of two damping plates 9 having a gap 9a between the support shaft 4 and the damper plate 8 are sandwiched therebetween. The upper damping plate 9 is engaged with the step 3 on the inner peripheral surface of the case, and the lower damping plate 9 is mounted on the inner peripheral surface of the case at a position corresponding to the lower part of the watertight chamber, and the high-viscosity liquid 7 is sealed in the watertight chamber. Do it. In this liquid-filled mount, for example, the flange 2 is applied to a member on the vibration-proof side, a bolt is attached to a through hole 16 provided in the flange 2, and a mounting member 10 on the oscillation side is attached to the lower end of the support shaft 4 by a bolt. Also, instead of fastening with bolts, the lower end mounting portion of the support shaft 4 is
It can also be mounted by press-fitting into the hole provided in. In addition,
Although the lower damping plate 9 is shown as projecting integrally from the inner peripheral surface of the case, a separately formed damping plate may be pressed into the case and attached.

When a vertical vibration is applied to the liquid-filled mount, the damping plate 9 moves by the movement of the flange 2 accompanying the vibration, and the high-viscosity liquid 7 is stirred. At this time, the flange 2
Is effectively attenuated due to the high viscosity of the liquid, the existence of the gap 8a, the upper and lower two gaps 9a, and the shear resistance of the laminated mount 6. The rigidity of the laminated mount 6 in the front-rear and left-right directions can be adjusted by selecting the hardness of the rubber.

Embodiment 2 A case where the liquid-filled mount according to the embodiment of the present invention is mounted on a link type axle box support device of a railway vehicle as a damping device will be described with reference to FIG. The damping device 13 is placed in a support frame 15 provided at the tip of the side beam 14 of the bogie frame, and the flange 2 of the damper device 13 is mounted on the top plate of the support frame 15. A shaft spring 20 composed of a coil spring is mounted between the spring seat 19 provided. Axle box 1
The inner side surface 8 and the side beam 14 are connected by a link device 21.

The basic structure of the damping device 13 is the same as that of FIG. 1, but instead of the support shaft 4, a bolt insertion hole is provided in the upper half and a projection 12c is provided in the lower half on the upper surface of the axle box. A shaft rod 11 provided with a support hole into which the fitted support 12 is inserted is used. The support column 12 is provided with a screw hole into which a bolt 17 is screwed. Then, the flange 2 is applied to the lower side of the top plate of the support frame 15 and bolts are attached to the through holes formed in the flange 2. On the other hand, a bolt 17 inserted into the bolt insertion hole of the shaft 11 is screwed into a screw hole provided at the tip of the support 12. In this case, when the axle box supporting device has an appropriate value of 200 to 1500 kgf / mm / axle box in the front-rear direction and the left-right direction, the damping coefficient for vertical vibration is 0.5 to 3 kgf.
-Construct so that the axle box support rigidity that satisfies the condition of sec / mm can be obtained.

Further, the damping device can be used in the opposite direction to the damping device 13 in the above embodiment. An example is shown in FIG. Its basic configuration is the same as that of FIG.
On the structure, the laminated mount is placed on the upper side, the watertight chamber filled with the highly viscous liquid is placed on the lower side, the flexible sealing lid 5a and the flange of the case are placed on the upper surface of the shaft box 18, and the support plate 43 is placed on the side. The difference is that it is placed on the top plate 15a of the support frame 15 provided on the beam 14 and fastened with bolts 44, and the upper end of the support shaft is attached to this support plate 43 with bolts 17a. In this case, when vibration in the vertical direction is applied to the damping device 13, the damping plate attached to the supporting shaft moves due to the movement of the supporting shaft accompanying the vibration, and agitates the highly viscous liquid. There is no difference in the damping action and effect on the vibration at this time.

Embodiment 3 FIG. 4 shows a case where the liquid-filled mount according to the embodiment of the present invention is mounted on a cylindrical rubber-type axle box support device of a railway vehicle as a damping device. In this case, a pair of front and rear shaft springs 20 are provided between the wing 40 projecting from the lower portion of the axle box 18 in the front-rear direction and the side beam 14 of the bogie frame. A damping device 13a having the same operation and effect as the damping device 13 is mounted.

Embodiment 4 FIG. 5 shows a case where the liquid-filled mount according to the embodiment of the present invention is mounted on an axle beam type axle box support device of a railway vehicle as a damping device. In this case, a shaft spring 20 is provided between the upper part of the axle box 18 and the side beam 14 of the bogie frame.
The damping device 13 shown in FIG.

[0024]

According to the liquid filled mount of the present invention, excellent damping performance can be exhibited in all frequency ranges from a low frequency range to a high frequency range. Available. Also, in the axle box support device for railway vehicles, if a liquid-filled mount that is less expensive than an axle damper is used as a damping device, it can be replaced when the attenuator fails, thereby improving maintainability compared to using an axle damper. You. In addition, installation space can be saved by mounting in the space inside the shaft spring.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a liquid filled mount according to an embodiment of the present invention.

FIG. 2 is a partially cutaway explanatory view showing a link type axle box support device of a railway vehicle equipped with a liquid filled mount according to an embodiment of the present invention as a damping device.

FIG. 3 shows a part of a link type axle box support device of a railway vehicle in which a stacked mount is mounted on an upper portion and a liquid filled mount filled with a high-viscosity liquid is mounted as a damping device, opposite to the liquid filled mount in FIG. FIG. 3 is an explanatory view cut away.

FIG. 4 is a partially cutaway explanatory view showing a cylindrical rubber-type axle box support device of a railway vehicle equipped with a liquid filled mount according to an embodiment of the present invention as a damping device.

FIG. 5 is a partially cutaway explanatory view showing an axle beam type axle box support device of a railway vehicle equipped with a liquid filled mount according to an embodiment of the present invention as a damping device.

FIG. 6 is a longitudinal sectional view showing an example of a conventional liquid-filled mount.

FIG. 7 is an explanatory view partially broken away showing a link type shaft box supporting device provided with a shaft damper as a conventional damping device.

FIG. 8 shows a liquid-filled mount having a single damping plate attached to the inner peripheral surface of the case (shown as a single damping plate in the figure) and attached to the inner peripheral surface of the case according to the invention of claim 1 of the present application. The two damping plates are mounted in a liquid-filled mount (in the figure, damping plate 2
7 is a graph showing a comparison between a change in the damping coefficient with respect to the vibration frequency (amplitude ± 1.0 mm) of the sheet and the number of sheets.

9 is a graph showing, similarly to FIG. 8, a comparison of a change in damping coefficient with respect to a vibration frequency (amplitude ± 2.0 mm) in the case of one damping plate and the case of two damping plates.

10A and 10B are graphs showing a relationship between a vertical attenuation coefficient C and a frequency required for a liquid-filled mount, wherein FIG. 10A shows a case of the present invention and FIG. 10B shows a case of a conventional product as a comparative example. .

FIG. 11 shows a dynamic spring constant K required for a liquid-filled mount.
7A is a graph showing the relationship between the frequency and the frequency, wherein FIG. 7A shows the case of the present invention, and FIG. 7B shows the case of a conventional product as a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 30 Case 2 Flange 3 Step part 4 Support shaft 5, 5a Flexible sealing lid 6 Laminated mount 6a Cylindrical mount rubber 6b Cylindrical mount plate 7 High-viscosity liquid 8 Damping plate 8a, 9a Gap 9 Damping plate 10 Mounting member DESCRIPTION OF SYMBOLS 11 Shaft bar 12 Prop 12a Support bar 12c Projection 13, 13a Damping device 14, 23 Side beam 15 24 Support frame 15a Top plate 16 Through hole 17, 27, 36, 44, 45 Bolt 18, 22 Shaft box 19, 26, 29 Spring seats 20, 25 Shaft spring 21 Link device 28 Shaft damper 31 Guide rod 32 Stack mount 33 Liquid filling chamber 34 Stopper plate 35 Damper plate 37 Small hole 38 Gap 39 Rubber stopper 40 Wing 41 Shaft beam 42 Special rubber 43 Support plate

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[Procedure amendment]

[Submission date] September 24, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

According to this device, the case 30 and the guide rod 3
When 1 is relatively displaced in the vertical direction, the damper plate 35 agitates the liquid in the liquid filling chamber 33, so that a large damping force is obtained. Fig. 10 (b) shows how to achieve excellent vibration isolation in the middle and high frequency range by using this liquid-filled mount.
Damping coefficient C ₂ for vertically oscillating as shown in the 2
In 6kgf · sec / mm, also the dynamic spring constant K ₂ as shown in FIG. 11 (b) it is necessary that satisfies the 200~400kg f / mm.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

In the axle box support device for a railway vehicle, in the axle box support device provided with an axle spring on an upper surface of a axle box or on a wing, the liquid-filled mount is inserted as an attenuating device into an inner space of the axle spring. , attach the flange case the upper end of the fluid-filled mount truck frame, comprising attach the lower end of the support shaft on the upper surface or wing of the axle box.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011] Still another axle box support device for a railway vehicle is a shaft beam type axle box support device in which an axle spring is mounted on an upper surface of the axle box and an arm extending from the axle box is connected to a bogie frame. Insert the liquid mount as a damping device into the internal space of the spring, and place the flange on the top of the case of the liquid mount.
Mounting the bogie frame, comprising a lower end of the support shaft Ke <br/> Installing the upper surface of the axle box.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

As the high-viscosity liquid, any liquid having a high viscosity and a low temperature dependency can be used, but silicone oil, polyisobutylene oil, polypropylene oil and the like are mainly used. Further, as a result of examining the damping performance of the gap 8a between the damping plate 8 and the inner peripheral surface of the case and the gap 9a between the damping plate 9 and the support shaft 4 by an experiment, it was found that 2 to 9 mm was desirable. Further, in order to exhibit excellent damping performance in all frequency range from the low frequency region to a high frequency range, vertical damping coefficient C ₁ as shown in FIG. 10 (a) 0.5 as a liquid sealed mount 3 kgf · sec / mm, FIG.
The dynamic spring constant K ₁ as shown in (a) is 40 to 80 kg f
/ Mm condition must be satisfied. The support rigidity of the axle box support device is set to an appropriate value 2 in the front-rear direction and the left-right direction.
It is desirable to set it to 00 to 1500 kgf / mm / shaft box.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction contents]

Embodiment 2 A case where the liquid-filled mount according to the embodiment of the present invention is mounted on a link type axle box support device of a railway vehicle as a damping device will be described with reference to FIG. Pay damping device 13 to the support frame 15 provided at the tip portion of the side frames 14 of the bogie frame, attach the flange 2 of the top plate to the damping device 13 of the support frame 15, on the said flange surface and the shaft box 18 A shaft spring 20 composed of a coil spring is mounted between the spring and the spring seat 19. Axle box 1
The inner side surface 8 and the side beam 14 are connected by a link device 21.

[Procedure amendment 7]

[Document name to be amended] Drawing

[Correction target item name] Fig. 8

[Correction method] Change

[Correction contents]

FIG. 8

[Procedure amendment 8]

[Document name to be amended] Drawing

[Correction target item name] Fig. 9

[Correction method] Change

[Correction contents]

FIG. 9

[Procedure amendment 9]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 10

[Procedure amendment 10]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 11

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor: Shigeo Sugawara 5-1-1109, Shimaya, Konohana-ku, Osaka-shi 3-105 Sugaya Fukukoku Co., Ltd. (72) Inventor Mitsuo Kuzukawa 3-105 Sugaya, Ageo-shi, Saitama Pref.

Claims (3)

[Claims] 1. A support shaft is inserted into a shaft center of a case provided with a mounting flange at an upper part of a cylindrical body, and a space between an upper end of the support shaft and an upper end of the case is water-tightly sealed with a flexible sealing lid. The space between the lower part of the case and the lower part of the support shaft is watertightly held by a laminated mount formed by laminating a plurality of cylindrical mount rubbers and a cylindrical mount plate, and the watertight formed by the flexible sealing lid and the laminated mount. In the room, a damping plate having a gap between itself and the inner circumferential surface of the case is attached to a central portion of the support shaft, and a pair of damping plates having a gap between the support shaft and the damping plate attached to the support shaft. A liquid-filled mount that is mounted above and below the inner surface of the case with a highly viscous liquid sealed in a watertight chamber. 2. A case for a liquid-filled mount, wherein the liquid-filled mount according to claim 1 is inserted as an attenuator into an inner space of the shaft spring in a shaft-box supporting device provided with a shaft spring on an upper surface or a wing of a shaft box. An axle box support device for a railway vehicle in which a flange at an upper end is attached to a bogie frame, and a lower end of a support shaft is attached to an upper surface or a wing of the axle box. 3. The liquid according to claim 1, wherein a shaft spring is mounted on an upper surface of the shaft box, and an arm extending from the shaft box is connected to a bogie frame. An axle box support device for railway vehicles in which a sealed mount is inserted as a damping device and the support shaft of the liquid sealed mount is attached to a bogie frame.