JPH1194010A - Liquid sealing mount and axle box suspension using it for railway rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve maintenance performance of a damping device by adopting a liquid sealing mount which shows high damping characteristics in all frequency ranges including a low frequency range. SOLUTION: A support shaft 4 is penetrated into an axis of a case 1. A flexible sealing cover 5 is arranged between an upper end of the support shaft 4 and an upper end of the case 1, for sealing. A lamination mount 6 is arranged between the lower side of the case 1 and the lower side of the support shaft 4 in a water-tight manner. A damping plate 8 is attached to the upper portion of the support shaft 4, within a water-sealing chamber surrounded by the flexible sealing cover 5 and the lamination mount 6, with a clearance 8a. A damping plate 9 is attached to a stepped portion 3 on an inner peripheral surface of the case, with a clearance 9a in respect to the support shaft 4. A plurality of small holes 8b, 9b are formed on one or both of damping plates 8, 9. Highly viscous liquid 7 is sealed into the water-sealing chamber.

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. 7, the liquid-filled mount is provided with a laminated mount 32 formed by laminating a mount rubber and a mount plate between a case 30 and a guide rod 31 inserted at the center thereof. A liquid filling chamber 33 is joined to the lower end, and a stopper plate 34 is provided along the lower edge of the case 30. 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 with a nut. The damper plate 35 has a plurality of small holes 37.
Is provided, and a rubber stopper 39 is attached to the periphery, and a gap 38 is formed between the liquid stopper chamber 33 and the inner periphery. A high attenuation 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 high-attenuation liquid in the liquid filling chamber 33, so that a large damping force is obtained. In order to exhibit excellent vibration isolation in the middle and high frequency range by using this liquid-filled mount, see FIG.
As shown in (b), the damping coefficient C ₂ for vertical vibration
Is 2 to 6 kgf · sec / mm, and the dynamic spring constant K ₂ is 200 to 400 kgf / m as shown in FIG.
It is necessary to satisfy the condition of m.

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

[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 rubber mount disclosed in Japanese Patent No. 638 exerts an excellent damping effect on vibration in a middle / high frequency range, but cannot expect excellent damping performance in all frequency ranges including a low frequency range. In addition, as described above, the shaft damper including the sealed oil damper requires a long time for overhaul and is poor in maintainability.

In view of the above situation, the present invention improves the maintainability of an attenuator by using a liquid-sealed mount capable of exhibiting high attenuation characteristics in all frequency ranges including a low-frequency range, and using the liquid-sealed mount. An axle box support device for a railway vehicle is provided.

[0009]

In order to achieve the above object, a liquid-filled mount according to the present invention is provided with a mounting flange at an upper portion of a cylindrical body and a step formed at a central portion of an inner peripheral surface. Insert the support shaft through the shaft center of the case, seal the space between the upper end of the support shaft and the upper end of the case water-tight with a flexible sealing lid, and form a plurality of cylindrical sections between the lower part of the case and the lower part of the support shaft. Damping with a gap between the inner peripheral surface of the case and a watertight chamber formed by a flexible sealing lid and a laminated mount, held in a watertight manner by a laminated mount formed by laminating the mounting rubber and the cylindrical mount plate. The plate is mounted on the upper part of the support shaft, and a damping plate having a gap between the support shaft and the damper is mounted on the inner peripheral surface of the case located between the damper plate mounted on the support shaft and the laminated mount. A plurality of small holes are provided on one or both plate surfaces of the damping plate, and a highly viscous liquid is sealed in a watertight chamber.

According to a third aspect of the present invention, there is provided an axle box support device for a railway vehicle, wherein the axle spring is mounted on an upper surface or a wing of the axle box. , The upper flange of the case of the liquid-filled mount is attached to the bogie frame, and the lower end of the support shaft is attached to the upper surface of the axle box or on the wing.

Further, in the shaft beam type supporting device for mounting a shaft spring on the upper surface of the shaft box and connecting the arm projecting from the shaft box to the bogie frame, the liquid according to claim 1 is provided in the internal space of the shaft spring. The sealed mount is inserted as a damping device, the upper flange of the case of the liquid sealed mount is attached to the bogie frame, and the lower end of the support shaft is attached to the upper surface of the axle box.

[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. The presence of the damping plate 8 and the damping plate 9 allows the gap 8a, 9a and the small holes 8b formed in the damping plate to move when the vertical vibration is applied to the device. The highly viscous liquid 7 is stirred through 9b. In this case, by applying the dynamic spring constant K ₁ shown in damping coefficient C ₁ and FIG. 12 (a) shown in FIG. 11 (a), high damping performance is obtained over the entire frequency range, including low frequency range.

[0013] Vibration caused by a liquid-filled mount having no small holes in the damping plates 8 and 9 and a liquid-filled mount having a plurality of small holes (13 mm in diameter) provided in the damping plate 8 according to the invention of claim 1 of the present application. The damping performance was compared and examined. As a result, FIG. 9 shows the relationship between the frequency and the damping coefficient when the amplitude is ± 2.0 mm, and FIG. 10 shows the relationship between the frequency and the dynamic spring when the amplitude is ± 2.0 mm. From these results, it can be seen that by forming a small hole in the damping plate, the damping effect has almost the same effect as that of the damping plate without holes, while the dynamic spring constant can be reduced.

When the liquid filled mount of the present invention is used as a damping device in an axle box support device, as shown in the link type axle box support device of FIG. Can be equipped. If the rigidity of the laminated mount 6 is appropriately selected for the front, rear, left, and right sides of the vehicle, excellent support characteristics can be obtained as an axial spring support device for a railway vehicle in combination with the resiliency of the shaft spring 20, and the vertical vibration can be reduced. The upper and lower damping plates, which have small holes on the plate surface, stir the highly viscous liquid, and the shear resistance of the laminated mount acts to provide excellent damping performance and improve the ride comfort of the vehicle. . In addition, even if the shaft spring is pre-compressed after the liquid sealing mount is mounted in the shaft spring, the pre-compression can be easily performed by the presence of the flexible sealing lid of the liquid sealing mount. If the liquid-filled mount of FIG. 7 shown as a prior art example is used as a damping device, the liquid-filling chamber is made of a metal container, so that no pre-compression can be given.

As the highly viscous 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. 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 were measured for the damping performance by an experiment, and as a result, the diameter of the small holes 8b and 9b was 5 to 20mm. Degree was found to be desirable. In order to exhibit excellent damping performance over the entire frequency range from the low frequency range to the high frequency range as a liquid-enclosed mount, FIG.
Vertical damping coefficient C ₁ as shown in (a) is 0.5
3.0kgf · sec / mm, the dynamic spring constant K ₁ as shown in FIG. 12 (a) is necessary to satisfy the conditions of 40~80kgf / mm. The support rigidity of the axle box support device is set to an appropriate value of 200 to 1500 k in the front-rear direction and the left-right direction.
gf / mm / shaft box is desirable.

[0016]

【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 flange 2 for attachment is provided at the upper part of the cylindrical body, and a support shaft 4 is inserted through the axis of the case 1 having a stepped portion 3 formed at the center of the inner peripheral surface,
The space between the upper end of the support shaft 4 and the upper end of the case 1 is water-tightly sealed with a flexible sealing lid 5 made of, for example, synthetic rubber. In a watertight chamber formed by the flexible sealing lid 5 and the laminated mount 6, the mounting rubber 6 a and the cylindrical mount plate 6 b are watertightly held by a laminated mount 6 formed by laminating the mount rubber 6 a and the cylindrical mount plate 6 b. A damping plate 8 having a gap 8a is attached to the upper part of the support shaft 4, and a damping plate 9 having a gap 9a
To the step 3 on the inner peripheral surface of the case. A plurality of small holes 8b, 9b are provided on both plate surfaces of the damping plate 8 and the damping plate 9. Then, the highly viscous liquid 7 is sealed in the watertight chamber. In this liquid-filled mount, for example, the flange 2 is applied to a member on the vibration-proof side, and a bolt is attached to a through-hole 16 provided in the flange 2. Instead of fastening with bolts, the lower end of the support shaft 4 can be press-fitted into a hole provided in the member 10 and attached. In addition, although the case where the damping plate 9 is fixed to the step portion 3 and shown is shown, as shown in FIG. Further, the damping plate 9
Can be press-fitted into the cylinder and attached. The small holes 8b and 9b can be provided on only one of the attenuation plates 8 and 9.

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
Movement is due to the high viscosity of the liquid and the gaps 8a, 9a and the small holes 8b, 9
b and the shear resistance of the laminate mount 6 provide effective damping. The hardness of the laminated mount 6 in the front-rear and left-right directions can be adjusted by selecting the rubber rigidity.

Embodiment 2 A case where the liquid-filled mount according to the embodiment of the present invention is mounted as a damping device 13 on a link type axle box support device of a railway vehicle will be described with reference to FIGS. Bogie frame side beam 1
4, the damping device 13 is placed in a support frame 15 provided at the tip of the support frame 15, the flange 2 of the damper device 13 is mounted on the top plate of the support frame 15, and a spring seat 19 provided on the flange surface and the axle box 18.
A shaft spring 20 composed of a coil spring is mounted between the two. The inner side surface of the axle box 18 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 the bolt insertion hole 1 is provided in the upper half instead of the support shaft 4.
1a is a shaft rod 11 provided with a support hole 11b in the lower half part for inserting a support 12 fitted on a projection 12c planted on the upper surface of a shaft box.
Use The support column 12 is provided with a screw hole into which the bolt 12b is screwed. Then, the flange 2 is attached to the lower side of the top plate of the support frame 15 and bolts 17 are attached to the through holes provided in the flange 2. On the other hand, the bolt 12b inserted into the bolt insertion hole 11a of the shaft rod 11 is
It is screwed into a screw hole provided at the tip of 2a. In this case, the appropriate value in the front-rear direction and the left-right direction of the axle box support device is 200 to 200, respectively.
In 1500 kgf / mm / axle box, the damping coefficient C ₁ for the vertical vibration is configured to satisfy axle box support rigidity of 0.5~3kgf · sec / mm is obtained.

Further, it can be used in a direction opposite to the damping device 13 in the above embodiment. An example is shown in FIG. The basic structure of the damping device 13 is the same as that shown in FIGS. 1 and 2 except that a laminated mount is arranged on the upper side, and a watertight chamber filled with a high-viscosity liquid is arranged on the lower side.
a and the flange 2 of the case are mounted on the upper surface of the axle box 18,
Top plate 15 of support frame 15 provided with support plate 43 on side beam 14
The difference is that the upper end of the shaft 11 is mounted on the support plate 43 with the bolts 12b. In this case, when vertical vibration is applied to the damping device 13,
The damping plate attached to the shaft moves due to the movement of the shaft accompanying the vibration, and stirs the highly viscous liquid. The damping action and effect on the vibration at this time are not different from those shown in FIGS.

Embodiment 3 FIG. 5 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 13a. 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. Same action as damping device 13
A damping device 13a having an effect is mounted.

Embodiment 4 Further, FIG. 6 shows a case where the liquid-filled mount according to the embodiment of the present invention is mounted as a damping device 13 on an axle beam type axle box support device of a railway vehicle. 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 inside of 8 and the side beam 14 are connected by a shaft beam 41, and a damping device 13 shown in FIG.

[0023]

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]

1A is a longitudinal sectional view of a liquid-filled mount according to an embodiment of the present invention, and FIG. 1B is a plan view of an attenuation plate.

FIG. 2 is a sectional view of a damping device mounted in a shaft spring of a shaft box supporting device according to an embodiment of the present invention.

FIG. 3 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. 4 is a view showing 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, contrary to the liquid filled mount in FIG. 3; It is explanatory drawing broken and shown.

FIG. 5 is an explanatory view showing a main part of 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. 6 is an explanatory view showing a main part of an axle beam type axle box support device of a railroad vehicle equipped with a liquid filled mount according to an embodiment of the present invention as a damping device.

FIG. 7 is a longitudinal sectional view showing an example of a conventional liquid-filled mount.

FIG. 8 is a partially cutaway explanatory view showing a link type axle box support device provided with an axle damper as a conventional damping device.

FIG. 9 shows a case where the amplitude of a liquid-encapsulated mount having no holes in the damping plates 8 and 9 (no-hole type) and a liquid-encapsulated mount having holes in the damping plates 8 and 9 (type with holes) are ± 2.0 mm. 6 is a graph showing the relationship between the vibration frequency and the damping coefficient at the time.

FIG. 10 shows a case where the amplitude of a liquid-encapsulated mount having no small holes in the attenuation plates 8 and 9 (no-hole type) and a liquid-encapsulated mount having small holes in the attenuation plates 8 and 9 (type with holes) are ± 2.0 mm. 6 is a graph showing the relationship between the frequency and the dynamic spring in FIG.

11A and 11B are graphs showing a relationship between a damping coefficient C in a vertical direction and a frequency required for a liquid-filled mount, wherein FIG. 11A shows a case of the present invention, and FIG. 11B shows a case of a conventional product as a comparative example. .

FIG. 12 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]

 1, 30 Case 2 Flange 3 Step 4 Spindle 5, 5a Flexible sealing lid 6 Laminated mount 6a Cylindrical mount rubber 6b Cylindrical mount plate 7 High viscous liquid 8, 9 Attenuation plate 8a, 9a Gap 8b, 9b Small Hole 10 Member 11 Shaft rod 11a Bolt insertion hole 11b Support hole 12 Post 12a Support rod 12b Bolt 12c Projection 13, 13a Damping device 14 Beam 15 24 Support frame 15a Top plate 16 Through hole 17, 27 Bolt 18, 22 Shaft box 19 , 29 Spring seat 20 25 Shaft spring 21 Link device 23 Bogie frame 26 Spring seat 28 Shaft damper 31 Guide rod 32 Stack mount 33 Liquid sealing chamber 34 Stopper plate 35 Damper plate 36 Bolt 37 Hole 38 Gap 39 Rubber stopper 40 Wing 41 Shaft beam 42 Special rubber 43 Support plate 44 Bolt

 ──────────────────────────────────────────────────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, an attenuation plate having a gap with the case inner peripheral surface is attached to the upper part of the support shaft, and a damper plate having a gap with the support shaft is attached to the case inner peripheral surface, and one or both of them are attached. A liquid-filled mount in which a plurality of small holes are arranged on the plate surface of the damping plate, and a highly viscous liquid is filled 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 an upper flange 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 a railway vehicle in which an enclosed mount is inserted as a damping device, the upper flange of the case of the liquid enclosed mount is attached to the bogie frame, and the lower end of the support shaft is attached to the upper surface of the axle box.