JP2001260878A - Rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit the vibration of a truck of a rolling stock resulting from an unbalanced driving system and reduce noises in the rolling stock following the vibration. SOLUTION: A traction link 30 for a truck frame 11 is connected to a connection member 40 suspended down from a body 20. The connection member 40 is filled with grains 50. Rotating vibration generated in a travelling motor, a reducer and a driving system for a shaft coupling is transmitted from the truck frame 11 through the link 30 to the connection member 40 and the body 20. Vibration energy generated in the connection member 40 is converted into kinetic energy for the grains 50 with the collision of the internal grains 50 with each other to reduce the vibration of the connection member 40. Therefore, the propagation of the vibration to the body can be inhibited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to 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-rear direction (link direction) compressive load generated at each time. The rubber bush is used for running stability. The link is connected to a connecting member called a so-called center pin projecting downward from the lower surface of the vehicle body.

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]

The vibration in the front-rear direction (running direction of the vehicle) generated on the bogie side is transmitted to the vehicle body side via a connecting portion such as two rubber bushes and links. For this reason, the noise inside the vehicle is high. In particular, the rotation frequency component of 80 to 300H due to the drive system imbalance
There is a problem that the z-band solid-borne vibration is transmitted to the bogie frame, causing the floor to vibrate and increasing the noise inside the vehicle.

The rotational vibration generated due to the imbalance of the drive system is relatively remarkable as a component having a magnitude of 10 m / s2 or less from 1 to 4 times the rotational vibration component f1 of the motor shaft. These rotational vibration components f1 to 4f1 are transmitted to the vehicle body as solid-borne vibrations via links, become vertical vibrations of the vehicle body floor, and appear as vehicle interior noise. In particular, during acceleration while the vehicle is running, twice the 2f1 component occurs in the front-rear direction, the left-right direction, and the up-down direction, and vibration in the front-rear direction in particular contributes to an increase in vehicle interior noise. In addition, during deceleration and coasting, the longitudinal vibration of the f1 component of 1 time and the 3f1 component of 3 times increases remarkably. For example, if f1 is 80 Hz,
2f1 is 160 Hz, 3f1 is 240 Hz, 4f1 is 3
20 Hz. Therefore, it is required to reduce the vibration of about 100 Hz or more.

[0006] An object of the present invention is to reduce in-vehicle noise with a simple configuration.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to connect a connecting member suspended from a lower surface of a vehicle body to a bogie frame by a towing link, and movably enclose a large number of granular bodies inside the connecting member. Can be achieved by:

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a railway vehicle according to the present invention will be described with reference to FIGS. Bogie frame 11
Are supported by two axles 13 having wheels 12 and support a motor 14 driving the axle 13 and a speed reducer composed of gears. The bogie frame 11 is connected to the vehicle body 2 via an air spring 15.
Supports 0.

A connecting member (generally called a center pin) 40 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 40 via rubber bushes 35, pins 36 and the like. The connecting member 40 is arranged to be inclined from the vehicle body 20 toward the connecting portion with the link 30. The cross section of the joint 45 at the lower end of the connecting member 40 has an inverted U-shape. Link 30
Is disposed in the horizontal direction of the running direction of the vehicle body, and penetrates the U-shaped portion of the joint 45.

The bogie frame 11 has a joint 15 having a U-shaped cross section. The link 30 includes the joint 15 of the bogie frame 11 and the connecting member 4.
0 is connected to the joint 45. This configuration is known.

The connecting member 40 has a rectangular horizontal section and is formed by welding plates constituting four surfaces. The flange 43 on the upper surface is fixed to the lower surface of the vehicle body 20 with bolts. Reinforcement plates 44 are welded to the inside of the plate constituting the four surfaces in a plurality of steps in the vertical direction. The reinforcing plate 44 has a hole at the center.

In the space inside the connecting member 40, a large number of granular bodies 50 for damping are put. The granular material 50 is inserted through an opening provided on a side surface of the connecting member 40. This opening is sealed with a lid 46, a sealant or the like. The granular material 50 inserted from above can be dropped downward by inclining the connecting member 40.

The particles 50 are lead-based or iron-based, and are spherical. The particle size is about 0.1 mm to 10 mm. The granules need not be spherical. It may be non-circular or polygonal in the manufacturing process.

The granular material 50 is not limited to one kind of shape (including size), but may be a mixture of granular materials having a plurality of shapes. According to this, the weight ratio increases and the frictional force increases,
The damping effect is improved. This shape refers to the difference in particle size and appearance. For example, it has a gourd shape, a polygonal shape, and a shape having irregularities on the surface. If there are a concave portion and a convex portion on the surface, the contact area between the granular materials is improved, and the vibration damping effect is improved.

The higher the packing density of the granular material 50, the better.
If it is too small, the damping effect is small. Also, the connecting member 40
Because the space inside is large, increasing the density of the weights leads to an increase in weight. The filling amount of the granular material 50 is determined from various experiments. Thereby, the position of the opening for receiving the granular material 50 may be determined. The amount of the granular material 50 in FIG. 1 is an example.

The particle size of the granular material 50 may be relatively large.
For example, it is several mm. If the granular material is as small as powder, the production cost increases. If the particle size is large, it can be manufactured relatively inexpensively.

In order to prevent rust, corrosion, or abrasion of the granular material 50, a hygroscopic material (eg, bengara) may be enclosed.

According to this configuration, when the bogie frame 11 vibrates due to the vibration of the drive system, the connecting member 40 vibrates via the link 30. As a result, the granules 50 in the connecting member 40 vibrate, and the collision between the granules 50, the connecting member 40
Due to the collision between the plate and the granular body 50, the vibration of the connecting member 40 is reduced, and the transmission of the vibration to the vehicle body 20 is reduced. As the specific gravity of the granular material 50 increases, the vibration energy of the connecting member 40 at the time of the collision is efficiently converted into the kinetic energy of the granular material 50. Thereby, the vibration energy is reduced, and the vibration of the connecting member 40 can be reduced. Particularly, due to the vibration of the drive system, the longitudinal movement of the granular body 50 inside the connecting member 40 does not need to oppose the gravity (vibration of 10 mm / S2 or more is not required), so that it is active even with a small excitation force. Be transformed into For this reason, the connecting member 4
Vibration in the front-rear direction that is propagated from 0 to the vehicle body 20 is reduced. Therefore, the vertical vibration of the vehicle body floor is reduced, and the vehicle interior noise radiated from the floor can be reduced.

That is, due to the back-and-forth vibration propagating through the link 30 through the solid, the granular body 50 repeatedly collides within a minute range. Therefore, the vibration energy generated in the connecting member 40 is converted into the kinetic energy of the granular body 50.
Thereby, the vibration in the connecting member 40 is reduced.

It is more effective to reduce the vibration of the connecting member 40 in the front-rear direction, which is the transmission path, as compared with the case where the granular material is installed on the floor of the vehicle body. This is because the granular material 50 actively moves with respect to the vibration of the connecting member 40 in the front-back direction even with a small excitation force (no vibration of 10 m / s2 or more against the gravity is required). Therefore, by suppressing the longitudinal vibration of the connecting member 40, the increase of the vertical vibration of the vehicle body floor can be suppressed, and the noise in the vehicle can be reduced. Further, since the connecting member 40 is relatively lightweight, vibration can be suppressed by a lightweight device.

Further, during acceleration / deceleration and coasting, the vibration in the front-rear direction is further increased, so that the vibration damping effect becomes more remarkable. In this case, the movement of the granular body 50 is such that the granular body 50 is actively moved even with a large excitation force, and the vibration damping effect is increased.

A granular material may be enclosed inside the link.
As is clear from the above description, it is better that the weight of the granular material is large. However, since the diameter of the link 30 is relatively small,
The packing density of the granules 50 is preferably as large as possible. However, it is necessary that the granular material 550 vibrate due to vibration. Further, a container enclosing the granular material may be attached to the outer surface of the link 30.

The longitudinal section of the connecting member 40 is substantially L-shaped.
It is. That is, the connecting member 40 includes a first portion 41 extending downward from the lower surface of the vehicle body 20 and a second portion 42 extending horizontally at a lower end of the first portion. The traction link 30 is connected to a joint 45 at the distal end of the second portion 42 projecting in the horizontal direction. The granular material 50 is sealed inside the second portion 42.

The second portion 4 thus extended in the horizontal direction
Since the traction link 30 is connected to the second part 2, the second part 42 is easily bent in the vertical direction. Since the granular material 50 is present in the second portion 42, the granular material 50 actively moves and the vibration is easily reduced.

The lower surface of the second part is inclined. For this reason, the granular body 50 becomes easy to move, and the vibration is reduced.

For example, the granular material 5 sealed in the link 30
The particle size of 0 is 1 mm, and the particle size of the granular material 50 sealed in the connecting member 40 is 3 mm, which is larger than that.

According to this, the granular bodies 50, 50 can be arranged in accordance with the characteristics of each part (the link 30, the connecting member 40), so that vibration suppression can be maximized.

Further, it is conceivable to reduce the transmission of vibration to the link 30 by enclosing a large number of granular materials in the member of the bogie frame 11 near the joint 15.

In the above embodiment, the connecting member and the bogie frame are connected by one tow link, but the present invention can also be applied to a case where the connecting member is connected by a plurality of links.

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.

[0033]

According to the present invention, it is possible to suppress the transmission of vibration generated from the drive system and reduce the noise in the vehicle with a simple structure in which the granular material is movably provided on the connecting member connecting the bogie and the vehicle body. You can do it.

[Brief description of the drawings]

FIG. 1 is a side view of a portion of a tow link according to one embodiment of the present invention.

FIG. 2 is a plan view of a carriage provided with one embodiment of the present invention.

FIG. 3 is a diagram for explaining the vibration characteristics of a bogie.

[Explanation of symbols]

11: bogie frame, 30: towing link, 40: connecting member, 5
0: Granular body.

Continued on the front page (72) Inventor Motomi Hiraishi 794, Higashi-Toyoi, Kazamatsu, Kamamatsu, Yamaguchi Prefecture Inside the Kasado Works of Hitachi, Ltd. F-term in the Kasado Plant (reference) 3J048 AA04 BF09 EA15

Claims (4)

[Claims] 1. A connecting member suspended from a lower surface of a vehicle body and a bogie frame are connected by a traction link, and a large number of particles are movably sealed inside the connecting member. Railway car. 2. The connecting member according to claim 1, wherein the connecting member comprises a first portion extending downward from a lower surface of the vehicle body, and a second portion extending horizontally at a lower end of the first portion. The railway vehicle, wherein the tow link is connected to the second end, and the granular material is sealed inside the second portion. 3. The railway vehicle according to claim 2, wherein a lower surface of the second portion is inclined. 4. The railway vehicle according to claim 1, wherein the granular body has a plurality of shapes.