JP2002087257A - Rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a truck for a rolling stock which can suppress the vibration attributable to unbalance of a driving system and reduce in-vehicle noise accompanied by the vibration. SOLUTION: An object 41 is installed on an outer circumferential part of a link 30 for connecting a connection member 25 of a vehicle body 20 to a truck frame 11 via an elastic sheet 41. The vibration generated from the driving system of the truck is transmitted to the link 30. The vibration energy generated in the link 30 is reduced by adding damping between the object 42 disposed on an outer circumference of the link 30 and the elastic sheet 41. Thus, propagation of the vibration to the vehicle body can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bogie for a railway vehicle.

[0002]

2. Description of the Related Art As described in Japanese Utility Model Publication No. 58-1406, a bogie frame of a railway vehicle and a vehicle body are connected by a towing link (hereinafter referred to as a link). Rubber bushes are arranged at both ends of the link, that is, in the front-rear direction. The rubber bush is designed to sufficiently withstand a large front-back (link) compressive load. The rubber bush is used for running stability. The bogie and the vehicle body are connected by a yaw damper.

Further, as a sound insulation panel using a granular material,
There is JP-A-10-266388. In the vehicle body floor using an aluminum honeycomb panel, powder having a particle size of 30 μm to 1000 μm is housed inside the panel to achieve vertical vibration control of the vehicle body floor.

[0004] As a vibration preventing device for a pipe through which a fluid passes, there is Japanese Utility Model Laid-Open No. 4-77092. In this method, a cylindrical body filled with granular materials is fixed to the outer periphery of a pipe via a rubber packing. The vibration of the pipe is absorbed by the vibration of the granular material.

[0005]

SUMMARY OF THE INVENTION Vibration in the front-rear direction (vehicle running direction) generated on the bogie side is transmitted to the vehicle body side via two rubber bushes, a link, and a connecting portion such as a yaw damper. . For this reason, the noise inside the vehicle is high. In particular, there is a problem in that the solid-borne vibration in the 80 to 300 Hz band of the rotational frequency component due to the imbalance of the drive system is transmitted to the bogie frame, causing the floor to vibrate and increasing the in-vehicle noise.

The rotational vibration generated due to the imbalance of the drive system is relatively remarkable as a component having a magnitude of 10 m / s ² or less from 1 to 3 times the rotational vibration component f ₁ of the motor shaft. These rotational vibration components f ₁ ~3f ₁ is transmitted as a structure-borne vibration to the vehicle body via a link becomes a vertical vibration of the vehicle body floor surface, it appears as vehicle interior noise. In particular, during acceleration while the vehicle is traveling contributing in the longitudinal direction, increases occur horizontal direction and the vertical direction to twice the 2f ₁ component, especially the front-rear direction of the vibration of the vehicle interior noise. Furthermore, during deceleration and coasting is 1 × f ₁ component, occurs remarkably vibration increase of 3 times the 3f ₁ component. For example, when f ₁ is a 80 Hz, 2f ₁
Is 160Hz, 3f ₁ is 240Hz. For this reason,
It is required to reduce vibration of about 100 Hz or more.

[0007] An object of the present invention is to reduce in-vehicle noise with a simple configuration.

[0008]

The above object can be achieved by installing an object via a resilient sheet on a connecting member between a vehicle body and a vehicle body or a connecting member between a vehicle body and a bogie frame. The connecting members include a traction link, a yaw damper, a left-right motion damper, a front-rear damper between the vehicle bodies, a bolster anchor, and the like.

According to this, the vibration energy generated in the connecting member is absorbed by the kinetic energy of the connecting member due to the additional damping between the object and the elastic body, and the vibration of the connecting member is reduced. . For this reason, propagation of vibration to the vehicle body can be suppressed, and vehicle interior noise can be reduced.

[0010] In-vehicle noise is generated by vibration of the floor of the vehicle body. The vibration source is the rotational imbalance of the drive system of the vehicle body. The connecting member is located between the vibration source and the floor of the vehicle body and vibrates mainly in the front-back direction. For this reason, the object attached to the outer periphery of the connecting member via the elastic body can easily move in the front-rear direction due to the minute displacement. For this reason, the object does not need to vibrate at a speed of 10 m / S ² against gravity, and the object moves actively even with a small excitation force. Therefore, the vibration source on the floor of the vehicle body can be suppressed, and the noise in the vehicle can be reduced.

Since the connecting member is relatively light, vibration can be suppressed with a simple device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a bogie for a railway vehicle according to the present invention will be described with reference to FIGS. The bogie frame 11 of the bogie is supported by two axles 13 having wheels 12 and supports a motor 14 for driving the axle 13 and a speed reducer composed of gears. The bogie frame 11 supports the vehicle body 20 via an air spring 15.

A connecting member (generally called a center pin) 25 protruding downward from the lower surface of the vehicle body is connected to a bogie frame 11 by a towing link (hereinafter referred to as a link) 30. The link 30 transmits a longitudinal force, and extends along the horizontal direction in the traveling direction.

The left and right ends of the bogie frame 11 are the yaw dampers 2
It is connected to the vehicle body 20 via 8, 28. Both ends of the yaw damper 28 are connected to the bogie frame 11 and the vehicle body 20 via rubber bushes in the same manner as the link 30. The yaw damper 28 is for preventing snake behavior during running.

Both ends of the link 30 are connected to the carriage 11 and the connecting member 25 via rubber bushes 35, pins 36 and the like. The connecting member 25 is arranged to be inclined from the vehicle body 20 toward the connecting portion with the link 30. The cross section of the lower end of the connecting member 25 is an inverted U-shape. The slope is along the running direction of the vehicle body. The link 30 is arranged in the horizontal direction of the running direction of the vehicle body, and penetrates the inverted U-shaped portion. The center of the link 30 is a tube 31.

Since vibrations originating from the electric motor 14, its speed reducer, and the drive system of the shaft coupling are transmitted mainly to the vehicle body via the link 30, an example in which the link 30 is provided with a vibration countermeasure will be described below. .

One vibration damping device 40 is attached to the outer periphery of the shaft portion (consisting of a cylinder) 31 of the link 30 on the connection portion side with the bogie frame 11. The vibration damping device 40 is installed on the side near the bogie frame 11.

The vibration damping device 40 includes an elastic sheet 41 disposed on the outer periphery of the cylindrical portion 31 and an object 42 fixed to the cylindrical portion 31 via the elastic sheet 41. Elastic sheet 41
Is a rubber sheet or the like. For example, a rubber sheet is formed by multi-layer winding. The object 42 is a semi-cylindrical metal member, and is made of an iron-based material or a metal (for example, lead) having a higher specific gravity equal to or higher than that. The object 42 is composed of two members. Each of the objects 42, 42 has a flange at the end of a semicircle. The flange is along the axial direction. This flange is firmly fixed with bolts 43 or the like. Instead of the bolt 43, it may be fixed by welding.

As the mass of the object 42 increases, damping acts between the elastic sheet 41 and the object 42 to increase the vibration damping effect. Further, by forming the elastic sheet 41 into a multilayer winding, sliding friction occurs on the surface of the elastic sheet 41, and the vibration damping effect is increased. The combination of the mass of the object 42 and the spring action of the elastic body makes it possible to arrange the object 42 in an optimal structure. At this time, if the elastic sheet 41 is a rubber sheet, it is preferable that the elastic sheet 41 is wound about three times with a plate thickness of 1 mm.

According to this configuration, when the link 30 vibrates due to the vibration of the drive system, the object 42 fixed via the elastic sheet 41 also vibrates even with a small displacement, and the elastic sheet 4
Due to the addition of damping between the object 1 and the object, the vibration energy of the link 30 is reduced, and the vibration of the link 30 can be damped. In particular, because of the vibration of the drive system, the longitudinal movement of the vibration damping device 40 does not need to be against gravity (vibration of 10 mm / S ² or more is not required), and is therefore activated even by a small excitation force. . For this reason, the vibration in the front-rear direction transmitted through the link 30 to the vehicle body is reduced. Therefore,
Vibration in the vertical direction of the vehicle body floor is reduced, and vehicle interior noise radiated from the floor can be reduced.

[0021] That is, a relatively significant 2f ₁ vibration components during acceleration, the longitudinal vibrations that borne via the link 30, repeated vibrations object 42 has minute displacement between the elastic sheet 41, the elastic Damping is added due to the relationship between the spring action of the seat 41 and the mass of the object 42 and the link 30
Will be attenuated. Further, since the mass of the object can be easily changed, the change can be made in accordance with the individual difference of the vehicle.

It is preferable to provide a stopper for suppressing the movement in the front-rear direction and a stopper for suppressing the rotation in the front-rear position of the object 42.

The embodiment shown in FIG. 5 will be described. As compared with this embodiment, one ends of the half portions of the objects 42, 42 are connected by a pin 51, and the other ends are connected by bolts 43 as in the previous embodiment. According to this, the objects 42, 42 can be easily installed on the outer periphery of the link 30 and can be mounted with high accuracy.

The embodiment shown in FIG. 6 will be described. In this case, concave portions are provided in the objects 42, 42 at the front and rear positions of the elastic sheet 41, and an O-ring 61 is disposed therein and sealed. According to this, the elastic sheet 41 is protected against disturbance such as rain and dust.
Deterioration of the elastic sheet 41 can be suppressed, and the damping effect can be maintained.

Incidentally, a protective cover may be provided on the outer periphery of the objects 42, 42.

The embodiment shown in FIGS. 7 and 8 will be described. This is one in which a plurality of objects (cylinders) 72 are arranged between the elastic sheet 41 and the containers 75, 75. The container 75 has a semicircular shape, and the flanges at the ends of the semicircle are connected by bolts 43. The flange is along the axial direction. An axial end of the container 75 has a flange that contacts the axial end of the cylinder 72.
The shaft end of the cylinder 72 is in contact with this flange.

According to this, it is easy to increase or decrease the mass of the object 71, and it is possible to change the mass for obtaining a vibration damping effect adapted to the characteristics of the vehicle.

The embodiment shown in FIG. 9 will be described. This is a cylinder 72
Instead, a plurality of semi-cylindrical members 77 are used.

The embodiment shown in FIGS. 10 and 11 will be described. The vibration damping device composed of the object 82 (84) and the elastic body 81 (83) is connected to the pin 36 on the bogie frame 11 side of the link 30 and the connecting member 2
It is arranged on the pin 36 on the fifth side. As a matter of course, they may be arranged on the connecting members 25 and 11.

FIG. 11 shows a case where an object 82 and an elastic body 81 are arranged on the pin 36 on the connecting member 25 side. The elastic body 81 is sandwiched between washers 84, 84 and is bonded or bolted. Washers 84 of the elastic body 81 are firmly fixed to the object 82 and the pin 36 by bolts 83 or the like.

According to this configuration, since the objects 82, 84 and the elastic bodies 81, 83 are installed on the pins 36, 36,
Damping is added at the portion of the pin 36, so that transmission of vibration to the vehicle body can be reduced. In combination with the damping device 40, the damping effect is further increased.

In each of the above embodiments, the cylinder 3 of the link 30
1 can be filled with a granular material, whereby vibration damping can be added. The granular material has a particle size of about 0.1 mm to 10 mm. The material of the granular material preferably has a high specific gravity, for example, lead. The grain state does not need to be spherical, but may be polygonal or the like. A hole for accommodating the granular material is provided in a cylinder, and the hole is covered with an elastic sheet 41 and closed.

The technical scope of the present invention is not limited to the language described in each claim or the language described in the section for solving the problem, and is easily replaced by those skilled in the art. It extends to a range.

[0034]

According to the present invention, a simple structure for fixing an object via a resilient sheet to a connecting member for connecting a vehicle body to a vehicle body and a connecting member for connecting a bogie to the vehicle body through a simple structure is provided. Transmission can be suppressed, and vehicle interior noise can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view including a longitudinal section of a main part of a towing link according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a plan view of a bogie provided with the tow link of FIG. 1;

FIG. 4 is a side view of the bogie at a portion of the tow link in FIG. 1;

FIG. 5 is a view corresponding to FIG. 2 of a tow link according to another embodiment of the present invention.

FIG. 6 is a view corresponding to FIG. 1 of a tow link according to another embodiment of the present invention.

FIG. 7 is a view corresponding to FIG. 1 of a tow link according to another embodiment of the present invention.

FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 7;

FIG. 9 is a diagram corresponding to FIG. 2 of another embodiment of the present invention.

FIG. 10 is a side view of a bogie at a portion of a tow link according to another embodiment of the present invention.

FIG. 11 is an enlarged view of a main part of FIG. 10;

[Explanation of symbols]

11: bogie frame, 25: connecting member, 28: yaw damper,
Reference numeral 30: traction link, 31: cylinder, 40: damping device, 41:
Elastic sheet, 42 ... object, 71 ... cylinder, 75 ... container, 7
7: Semi-cylindrical member, 82, 84: Object.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Motomi Hiraishi 794, Higashi-Toyoi, Kazamatsu, Kamamatsu City, Yamaguchi Prefecture Inside the Kasado Plant of Hitachi, Ltd. (72) Kazuhiro Makino, Inventor Kazuhiro Makino 794, Higashi-Toyoi, Kazamatsu-shi, Yamaguchi Prefecture In-house, Kasado Plant

Claims (11)

[Claims] An object is provided on a connecting member between a vehicle body and a vehicle body or a connecting member between a vehicle body and a bogie frame via an elastic sheet. 2. The railway vehicle according to claim 1, wherein said object has a specific gravity equal to or higher than that of an iron-based vehicle. 3. The railway vehicle according to claim 1, wherein said connecting member is a traction link connecting a second connecting member protruding downward from said vehicle body to said bogie frame. . 4. The railway vehicle according to claim 3, wherein said elastic sheet is wound around an outer periphery of a shaft portion of said towing link, and said object is arranged around an outer periphery of said elastic sheet. vehicle. 5. The railway vehicle according to claim 4, wherein said object is composed of two semicircular members, and the two are connected. 6. The railway vehicle according to claim 3, wherein said elastic sheet is wound around an outer periphery of a shaft portion of said towing link, and a container is provided on an outer periphery of said elastic sheet, and between said elastic sheet and said container. A railway vehicle, wherein the object is arranged. 7. The railway vehicle according to claim 6, wherein said object is divided in a circumferential direction. 8. The railway vehicle according to claim 1, wherein the elastic sheet is provided on a pin of the connecting member on the bogie frame side or a pin of the connecting member on the vehicle body side. . 9. An elastic sheet spread around an outer periphery of a shaft portion of a connecting member between a vehicle body and a vehicle body or a connecting member between a vehicle body and a bogie frame, and an object disposed on the outer periphery of the elastic sheet. Vibration control device. 10. The vibration damping device according to claim 9, wherein said object is composed of two semicircular members, and both are connectable. 11. The vibration damping device according to claim 9, further comprising a container arranged on an outer periphery of said elastic sheet, wherein said object is arranged between said container and said elastic sheet, wherein said object is arranged in a circumferential direction. The vibration damping device is divided into a plurality.