JP2000142398A - Anti-vibration rubber for shaft beam equipment for railway vehicles - Google Patents

Abstract

(57) [Abstract] [Problem] To reduce the amount of industrial waste and running cost by recycling the central shaft with very little deterioration over time, and at the same time, to provide anti-vibration characteristics corresponding to the usage environment. The setting can be changed easily and widely. SOLUTION: A mandrel 1a of a central shaft 1 having flanges 1b, 1b at both ends in the axial direction, and a rubber elastic body which is arranged on the outer periphery of the central shaft 1 and is divided into two in the circumferential direction. 2
A, 2B and the divided outer cylinders 3A, 3B covering the outer periphery thereof are configured as independent parts so that they can be separated and assembled from each other, and the mandrel 1a of the central shaft 1 and the divided rubber elastic bodies 2A, 2A
B are positioned in the assembled state with B, and pins 5a and 6b are provided on one side as engagement portions that are integrated in the circumferential direction.
The pin holes 5b and 6a are provided on the other side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration rubber for an axle beam device for railway vehicles, and more particularly, to an anti-vibration rubber provided at one end of an axle beam extending in a vehicle traveling direction from an axle box portion supporting an axle of a railway vehicle. By fitting and fixing to the cylindrical housing part and fixing its central axis to the bogie frame in a non-rotatable manner, rotational movement around the central axis of the shaft beam is allowed, and vibration of the connecting part between the shaft beam and the bogie frame. Also, the present invention relates to an anti-vibration rubber for a rail beam device for a railway vehicle used to absorb an impact.

[0002]

2. Description of the Related Art As shown in FIG. 7 and FIG.
A central shaft 20 having flanges 20b, 20b at both ends in the axial direction of Oa, and flanges 20b, 20 at both ends in the axial direction at both ends in the axial direction.
b, a cylindrical rubber elastic body 21 having flange portions 21a, 21a corresponding to b, and an outer cylinder 22 made of a thin metal plate that covers the entire outer peripheral surface of the rubber elastic body 21. These components 20, 21, 22 were simultaneously bonded and integrated during vulcanization.

[0003]

In the vibration isolating rubber of the railroad beam shaping device having the above structure, the ratio of the center shaft 20 among the components 20, 21, 22 is overwhelmingly large. . Incidentally, the center axis 20 is 80
Accounts for ~ 90%. On the other hand, most of the causes of the deterioration of the vibration isolation performance due to the use over time are the elastic deterioration of the rubber elastic body, and the center axis is still in a usable state even at the time of replacement for returning the performance. Nevertheless, when the components 20, 21, 22 are vulcanized and integrated as in the past, the entire vibration isolating rubber including the center shaft 20 is replaced with a new one at the time of replacement. It is necessary to dispose of used rubber vibration absorbers together, which not only increases the amount of industrial waste generated, but also increases the running cost of rubber beam vibration absorbers for railway vehicles. there were.

[0004] The present invention has been made in view of the above-mentioned circumstances, and it is possible to recycle a central shaft with very little deterioration over time, thereby reducing the amount of industrial waste and the running cost. It is an object of the present invention to provide an anti-vibration rubber for a rail beam axle beam device capable of easily and widely changing the anti-vibration characteristics according to the environment and the like.

[0005]

In order to achieve the above object, an anti-vibration rubber for a railroad vehicle shaft beam device according to the present invention is provided.
A cylindrical rubber elastic member having a central shaft having flanges at both ends in the axial direction, and a flange disposed at the outer periphery of the central shaft and having flanges at both ends in the axial direction corresponding to the flanges of the central shaft. Body and
In an anti-vibration rubber for a rail beam device for a railway vehicle comprising an outer cylinder covering the entire outer peripheral surface of the rubber elastic body, the mandrel and the rubber elastic body excluding at least both end flange portions of the center shaft are provided. In addition to being configured so that they can be separated and assembled from each other, the mandrel of the central shaft and the rubber elastic body are positioned in the assembled state of the rubber elastic body, and an engaging portion that is integrated in the circumferential direction is provided. Is what you do.

According to the present invention having the above-described structure, at least the mandrel of the center shaft and the rubber elastic body are independent parts, and when they are used, they are assembled together, and are positioned via the engaging part. By integrating them, they are configured to exhibit a predetermined function as an anti-vibration rubber. Therefore, according to the present invention, when the rubber elastic body deteriorates due to aging or is locally damaged and needs to be replaced, the vibration isolating rubber does not need to be entirely disposed and the center shaft can be replaced. At least the mandrel is separated from the rubber elastic body, only the rubber elastic body is replaced with a new one, and the mandrel can be recycled as it is. As a result, the amount of generated industrial waste and the running cost of the vibration isolating rubber can be reduced.

Also, various types of rubber elastic bodies having different rubber characteristics are prepared as rubber elastic bodies which become independent parts with respect to the mandrel of the central shaft by selecting hardness, material, etc., and various rubber elastic bodies having different rubber characteristics are prepared. By selecting any one of the above and assembling and integrating it with the mandrel of the center shaft, the mandrel is kept in common, and a wide range of spring characteristics, that is, multiple types of vibration Rubber can be obtained easily and inexpensively.

In particular, in the vibration isolating rubber of the rail beam device for a railway vehicle having the above-mentioned structure, the rubber elastic body is divided into a plurality of parts in the circumferential direction as described in claim 2, and these are divided with respect to the mandrel of the central axis. Separately assembling allows separate rubber elastics to be used in combination with different characteristics, such as when a strong force acts on a specific rubber elastic when a vehicle is braked. The entire rubber elastic body can be appropriately designed in accordance with various use environments such as a case where a heat source is near or where a local part is easily affected by heat, and the durability can be improved.

[0009] In the vibration isolating rubber for a railway vehicle shaft beam device having the above structure, the rubber elastic body includes a rubber elastic body including a flange-shaped portion at both axial ends thereof. By adopting a configuration in which a rigid plate that holds the entire elastic body in a predetermined shape is integrally bonded, the shape retention of the rubber elastic body is improved, and the stability of functions when used with the center shaft assembled is improved. In addition, the engagement strength of the engagement portion can be increased, and the performance of positioning and integration in the circumferential direction can be enhanced.

Further, in the vibration isolating rubber of the rail beam axle device for a railway vehicle having the above structure, the center shaft is separated into flange portions and mandrel portions at both ends in the axial direction. It is also possible to adopt a configuration in which the formed flange portions at both ends are integrally connected to both ends of a rigid plate that holds the entire rubber elastic body in a predetermined shape. Still further, it is structurally most preferable that the engaging portion for positioning the center shaft and the rubber elastic body and for integrating the rubber member in the circumferential direction is constituted by a pin and a pin hole. Although it is simple and easy to manufacture, other than this, the mandrel of the central axis may be formed in a square shape, or may be formed in a circular shape and a part of the peripheral portion may be cut off flat.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal side view of an anti-vibration rubber of a rail beam axle beam device according to a first embodiment of the present invention,
FIG. 2 is a longitudinal sectional front view taken along line AA in FIG. 1. The basic configuration is the same as that of the conventional one shown in FIGS. The center shaft 1 formed integrally with the flanges 1b, 1b and the center at both ends in the axial direction of the cylindrical portion 2a arranged on the outer periphery of the center shaft 1 and enclosing the mandrel 1a of the center shaft 1 Both ends flanges 1b, 1 of shaft 1
b, flange portions 2b, 2 integrally provided so as to correspond to b.
b), and an outer cylinder 3 made of a thin metal plate that covers the entire outer peripheral surface including both end flange portions 2b, 2b of the rubber elastic body 2.

In the vibration isolating rubber C of the rail beam axle beam device having the basic configuration as described above, the center shaft 1 and the rubber elastic body 2 are formed as independent parts so that they can be separated and assembled to each other. In addition, the rubber elastic body 2 and the outer cylinder 3 are also divided into two in the circumferential direction. These two divided rubber elastic bodies 2A and 2B and the divided outer cylinders 3A and 3B are formed integrally with each other in a half-cylinder shape having a circumferential angle θ of 180 ° or less, specifically about 120 to 130 °. On the inner peripheral surface of each of the divided rubber elastic bodies 2A, 2B, including the flanged portions 2b, 2b at both ends in the axial direction, the divided rubber elastic bodies 2A, 2B are formed.
Rigid plates 4A and 4B, such as steel plates, which hold B in a predetermined shape, are formed in exactly the same shape and integrally bonded,
These split rubber elastic bodies 2A, 2B, split outer cylinders 3A, 3B
The central shaft 1 and the rubber elastic body 2 are separated from each other by moving the integral body of the rigid plates 4A and 4B in the radial direction with respect to the mandrel 1a of the central shaft 1 as shown by arrows in the drawing. It is freely configured.

In addition, the mandrel 1a of the center shaft 1 and the divided rubber elastic members 2A and 2B of the rubber elastic member 2 are positioned in the axial direction in the assembled state and integrated in the circumferential direction. As a joint, a pin 5a is attached to one of the diametrically opposed portions on the outer peripheral surface of the axially intermediate portion of the mandrel 1a.
And a pin hole 5b is formed on the other, and a pin hole 6a with which the pin 5a is engaged is formed on the inner peripheral surface of the axially intermediate portion of one of the divided rubber elastic bodies 2A. A pin 6b that engages with the pin hole 5b protrudes from a rigid plate 4B serving as an inner peripheral surface of an intermediate portion in the axial direction of the rubber elastic body 2B.

As shown in FIG. 3, in the rubber vibration isolator C of the rail beam device for a railway vehicle having the above-described structure, divided man-made rubber elastic bodies 2A and 2B and divided outer cylinders 3A and 3
B and the rigid plates 4A and 4B are moved toward the inside in the radial direction, respectively, so that the pin hole 6a of one of the divided rubber elastic bodies 2A is engaged with the pin 5a of the mandrel 1a, and the other. The center shaft 1 and the rubber elastic body 2 (divided rubber elastic bodies 2A, 2B) are positioned by engaging the pin 6b of the divided rubber elastic body 2B with the pin hole 5b of the mandrel 1a, and Both can be mounted on a predetermined form of vibration-proof rubber C integrated in the circumferential direction.

The anti-vibration rubber C thus assembled
As shown in FIG. 4, is fitted and fixed to a cylindrical housing part 10 provided at one end of an axial beam 9 extending in the vehicle traveling direction from an axle box part 8 supporting an axle 7 of a railway vehicle. By fixing both ends of the shaft 1 to the bogie frame 11 in a non-rotatable manner, rotational movement of the shaft beam 11 around the central axis 1 is allowed, and vibration and impact of a connecting portion between the shaft beam 9 and the bogie frame 11 are reduced. Used to absorb.

If the rubber elastic body 2 deteriorates or is locally damaged due to aged use in the above-mentioned state and needs to be replaced, the two integrated members are reversed. 1 and 2, the center shaft 1 and the rubber elastic body 2 (the divided rubber elastic bodies 2A,
2B), only the rubber elastic body 2 is replaced with a new one, and the center shaft 1 is recycled and used as it is to regenerate the original anti-vibration rubber C to exhibit the same vibration and shock absorbing function as above. It can be used to

Further, by appropriately changing the circumferential angle θ of the divided rubber elastic bodies 2A and 2B or changing the material hardness thereof, the divided rubber elastic bodies 2A and 2B are changed.
By adjusting the spring constant of B, the vibration isolation characteristics of the whole rubber cushion C can be set and changed over a wide range. further,
In response to various usage environments, such as when the brake is applied to the vehicle and when it acts strongly on a specific rubber elastic body or when there is a heat source nearby and the local area is easily affected by heat,
By setting the spring constants of the two divided rubber elastic bodies 2A and 2B to be different from each other by selecting a material and hardness, it is possible to appropriately design the entire rubber elastic body 2 to improve the durability. .

FIGS. 5 and 6 are a longitudinal sectional side view and a longitudinal sectional front view taken along the line BB of FIG. 5, respectively, of a rubber damper for a railroad vehicle shaft beam device according to a second embodiment of the present invention. In the second embodiment, the center shaft 1 is connected to the flanges 1b at both ends in the axial direction.
1b is separated from the mandrel 1a, and the separated flanges 1b, 1b are integrally connected to both ends of rigid plates 4A, 4B such as steel plates for holding the divided rubber elastic bodies 2A, 2B in a predetermined shape. The flanges 1b, 1b are configured to be used as a part of the shape retaining plate of each of the divided rubber elastic bodies 2A, 2B and the flange of the central shaft 1. Other configurations are the same as those of the first embodiment, and therefore, the same portions are denoted by the same reference numerals and detailed description thereof will be omitted.

In the vibration isolating rubber C according to the second embodiment having the above structure, if the rubber elastic body 2 deteriorates due to aging or is locally damaged and needs to be replaced,
The mandrel 1a of the central shaft 1 can be recycled and used as it is to regenerate the original vibration-isolating rubber C and exert the same vibration and shock absorbing function as described above.

In each of the above embodiments, the rubber elastic body 2 is divided into two in the circumferential direction, but may be divided into three or more. Also, each of the divided rubber elastic bodies 2A, 2A,
In the above embodiment, a combination of a pin and a pin hole, which is the simplest in structure and is easy to manufacture, is used as an engaging portion that positions both members in the axial direction in the assembled state with the 2B and that is integrated in the circumferential direction. However, other than this, a configuration may be adopted in which the mandrel 1a of the central shaft 1 is formed in a square shape, or formed in a circular shape, and a part of the periphery thereof is cut off flat.

[0021]

As described above, in short, the present invention is characterized in that at least the mandrel of the center shaft and the rubber elastic body are formed as independent parts and are assembled and integrated when used, and the rubber elastic body is deteriorated by aging. If it is necessary to replace the rubber due to damage or local damage, the two parts can be separated from each other. Can be replaced with a new one, and the mandrel that occupies most of the anti-vibration rubber can be recycled as it is to restore the anti-vibration rubber of a predetermined performance. Therefore, the amount of industrial waste generated can be reduced, and the running cost of the vibration-proof rubber can be significantly reduced.

In addition, various types of rubber elastic bodies having different rubber characteristics depending on the selection of hardness, material and the like are prepared as rubber elastic bodies which are independent parts with respect to the center shaft part, and various types of rubber elastic bodies having different rubber characteristics are prepared. By selecting any one of the bodies and assembling it with the mandrel of the central shaft and using it integrally, the mandrel is kept in the common specification, and a wide variety of spring characteristics, that is, multiple types of There is an effect that the vibration-proof rubber can be easily and inexpensively obtained.

In particular, by dividing the rubber elastic body into a plurality of parts in the circumferential direction and separating and assembling them with respect to the mandrel of the central shaft, it is possible to use a combination of the rubber elastic bodies having different characteristics as the divided rubber elastic bodies. It is possible to cope with various use environments, such as when a strong force acts on a specific split rubber elastic body when the vehicle is braked, or when there is a heat source nearby and the local area is easily affected by heat. By appropriately designing the entire rubber elastic body, the durability can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of an anti-vibration rubber of a rail beam axle beam device according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional front view taken along line AA of FIG. 1;

FIG. 3 is a longitudinal sectional side view showing an assembled state of the vibration isolating rubber.

FIG. 4 is a partially cutaway front view for explaining a usage mode of the vibration isolating rubber.

FIG. 5 is a longitudinal sectional side view of an anti-vibration rubber of a rail beam axle beam device according to a second embodiment of the present invention.

FIG. 6 is a vertical sectional front view taken along line BB of FIG. 5;

FIG. 7 is a vertical sectional side view of a vibration-proof rubber of a conventional railroad vehicle shaft beam device.

FIG. 8 is a vertical sectional front view taken along line DD of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Center axis 1a Mandrel part 1b Flange part 2 Rubber elastic body 2A, 2B Divided rubber elastic body 2a Flange part 3 Outer cylinder 3A, 3B Divided outer cylinder 4A, 4B Rigid plate 5a, 6b Pin (an example of an engaging part) 5b, 6a Pin hole (an example of an engaging portion)

Claims (5)

[Claims] 1. A central shaft having flanges at both ends in the axial direction, and a flange disposed at the outer periphery of the central shaft and corresponding to the flanges of the central shaft at both ends in the axial direction. In a vibration-isolating rubber for a railway vehicle shaft beam device including a cylindrical rubber elastic body and an outer cylinder covering the entire outer peripheral surface of the rubber elastic body, a mandrel excluding at least both end flange portions of the center shaft. And the rubber elastic body are configured such that they can be separated and assembled from each other, and they are positioned in the assembled state of the mandrel of the central shaft and the rubber elastic body, and the engaging part is integrated in the circumferential direction. An anti-vibration rubber for a rail beam axle beam device, characterized in that: 2. The rubber elastic body is divided into a plurality in the circumferential direction, and each of the plurality of divided rubber elastic bodies is
2. The vibration isolating rubber for a rail beam axle beam device according to claim 1, wherein the flanged portion at both ends and the mandrel are integrally formed so as to be able to be separated and assembled in a radial direction with respect to the mandrel of the central shaft. 3. A rigid plate for holding the entire rubber elastic body in a predetermined shape, including flange-shaped portions at both axial ends thereof, is integrally bonded to an inner peripheral surface of the rubber elastic body. 3. An anti-vibration rubber for the rail beam shaft beam device according to 2. 4. The central shaft is separated into a flange portion and a mandrel portion at both ends in the axial direction, and the separated flange portions at both ends hold the entire rubber elastic body in a predetermined shape. 4. The rubber vibration isolator according to claim 1, wherein said rubber beams are integrally connected to both ends of said shaft beam device. 5. The method according to claim 1, wherein the engaging portion comprises a mandrel of the center shaft, a pin protruding from one of the inner and outer corresponding portions of the rubber elastic body, and a pin hole formed on the other. Anti-vibration rubber for rail beam shaft beam devices.