JP2000225940A - Vibration control rubber bushing for rolling stock shaft beam device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce machining hours, number of part items and man hours for assembly and improve the durability of the whole of a rolling stock shaft beam device by securing a specified vibration control function for a long time. SOLUTION: A projection 12, which is projected in a radial direction by pressing a part of the external cylinder 11 covering all over the external periphery of the cylindrical rubber elastic body 10, a vibration control rubber bushing, which is fittedly fixed to the cylindrical housing section 4 continuously arranged at the end section of a shaft beam 3 and the center shaft 7 of which is unrotatably fixed to a truck frame, is formed. The relative slide between the cylindrical rubber elastic body 10 and the cylindrical housing section 4 when the shaft beam 3 rotates around the center shaft 7 is prevented by engaging this projection 12 in the recessed section 13 formed on the internal wall of the cylindrical housing 4.

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 bush for a railroad vehicle axle beam device, and more particularly, to one end of an axle beam extending in a vehicle traveling direction from an axle box portion supporting an axle of a railroad vehicle. The present invention relates to an anti-vibration rubber bush for a railroad vehicle shaft beam device that is used to be connected to one end portion of a shaft beam and a bogie frame when connected and supported.

[0002]

2. Description of the Related Art This type of railcar shaft beam device is arranged and fixed to a cylindrical housing portion provided at one end of the shaft beam at a center axis perpendicular to a vehicle traveling direction and at an outer periphery of the center shaft. A vibration-proof rubber bush consisting of a cylindrical rubber elastic body formed and an outer cylinder fixed so as to cover the entire outer peripheral surface of the cylindrical rubber elastic body is fitted and fixed, and the center axis of the vibration-proof rubber bush is fixed. By being fixed to the bogie frame so as not to be rotatable, rotation of the shaft beam about the central axis of the shaft beam is allowed based on the elastic action of the cylindrical rubber elastic body of the vibration-isolating rubber bush, and a connecting portion between the shaft beam and the bogie frame. It exhibits a vibration-proof function such as absorbing vibrations and shocks.

In order to reliably exert the above-described vibration damping function, it is necessary to prevent relative slippage between the cylindrical rubber elastic body and the cylindrical housing portion during the rotation about the central axis of the shaft beam. As a countermeasure for preventing relative slippage, conventionally, as disclosed in Japanese Utility Model Application Laid-Open No. Hei 6-23863, for example, a pin hole is provided on the inner peripheral side of a housing portion, and a pin hole is fixed by being pushed into the pin hole. Means has been adopted in which a pin hole in which a protruding portion of the mating pin is inwardly engaged is formed in the outer cylinder and the cylindrical rubber elastic body of the vibration-proof rubber bush.

[0004]

However, in the conventional railcar axle beam device as described above, not only the inner peripheral side of the cylindrical housing portion but also the outer cylinder and the cylindrical rubber elastic body side of the vibration-proof rubber bush. It is not only necessary to precisely form the pin holes so that there is no misalignment, but also, after the engaging pins are pushed and fixed in the pin holes of the cylindrical housing, Is troublesome assembling such that the protruding portion engages with the pin holes on the outer cylinder and the cylindrical rubber elastic body side of the vibration-proof rubber bush. Moreover,
Stress concentrates on the pin hole portion on the rubber elastic body side via the engaging pin, so that the rubber elastic body is easily cracked or the like, and the predetermined vibration isolating function cannot be maintained for a long period of time. There was a problem of lack of durability.

The present invention has been made in view of the above circumstances, and can reduce the number of processing, the number of parts, and the number of assembling steps. An object of the present invention is to provide an anti-vibration rubber bush for a railway beam shaft device capable of improving durability.

[0006]

In order to achieve the above object, a vibration isolating rubber bush for a railcar axle beam device according to the present invention is provided with a center axis perpendicular to a vehicle traveling direction and an outer periphery of the center axis. An anti-vibration rubber bush having a cylindrical rubber elastic body disposed and fixed and an outer cylinder fixed so as to cover the entire outer peripheral surface of the cylindrical rubber elastic body, wherein the outer cylinder is an axle of a railway vehicle. Axle beam extending from the axle box portion in the vehicle traveling direction to the end portion of the shaft beam is disposed continuously in a horizontal posture perpendicular to the vehicle traveling direction, and is divided into two halves in the vehicle traveling direction. In a vibration-absorbing rubber bush for a railroad vehicle axle beam device, the body is fitted and fixed to a cylindrical housing portion that can be fastened to each other, and the center axis thereof is fixed to the bogie frame so as not to rotate. Pressed part of the cylinder to protrude radially outward The cylindrical rubber elastic body and the cylinder at the time of the rotational movement around the central axis of the shaft beam are formed by forming a convex portion that engages with a concave portion formed on the inner peripheral side of the cylindrical housing portion. Characterized in that it is configured to prevent relative sliding with the housing.

According to the present invention having the above-described structure, the protrusion formed by pressing the part of the outer cylinder of the vibration-isolating rubber bush is engaged with the recess formed on the inner peripheral side of the cylindrical housing part. By doing so, it is possible to prevent relative slippage between the cylindrical rubber elastic body and the cylindrical housing part during rotational movement about the central axis of the shaft beam, and to prevent relative slippage with the cylindrical rubber elastic body. The use of an engaging pin, which is a small part separate from the cylindrical housing part, becomes unnecessary, so that not only the number of parts but also the number of assembly steps can be reduced. In addition, since it is not necessary to provide a pin hole in the rubber elastic body of the vibration-proof rubber bush, stress concentration that may cause a crack or the like does not occur in the rubber elastic body, and the vibration-proof function as specified can be performed for a long period of time. Thus, it is possible to improve the durability of the entire shaft beam device.

In the vibration-absorbing rubber bush for a railway vehicle axle beam device having the above-mentioned structure, the convex portion of the outer cylinder may be formed in a closed-end cylindrical shape having a closed top at the protruding end. A hole may be formed in a part of the tube, and the edge of the hole may be formed by burring to expand the edge of the hole into a cylindrical shape. Thus, the durability of the shaft beam device can be improved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view of a railroad vehicle axle beam device according to an embodiment of the present invention, and shows an axle beam from an axle box portion 2 supporting an axle 1 of a railroad vehicle in a vehicle traveling direction (arrow Y direction). A cylindrical housing 4 is connected to one end of the shaft beam 3.
An outer cylinder 11 of an anti-vibration rubber bush 6, which will be described later, is fitted and fixed in a fitting hole 5 of the cylindrical housing portion 4, and both ends of the center shaft 7 of the anti-vibration rubber bush 6 are connected to a bogie frame 8.
Fixed to the central axis 7 of the beam 3
It is configured to allow a rotational movement around and absorb vibrations and shocks at a connecting portion between the shaft beam 3 and the bogie frame 8.

The housing part 4 is a half-split type which is divided into two in the vehicle traveling direction Y. One half-split body 4A is integrated with the shaft beam 3 as shown in FIG. 4B can be fastened to the rubber elastic body 10 of the anti-vibration rubber bush 6 by applying a predetermined tightening force to the anti-vibration rubber bush 6 at the time of the fastening. It is configured to add.

The anti-vibration rubber bush 6 is shown in FIGS.
As shown in FIG. 5, a central shaft 7 integrally formed with flange portions 7b, 7b at both axial ends of a mandrel portion 7a having a solid cross section and arranged in a horizontal posture perpendicular to the vehicle traveling direction Y, A mandrel 7 a of the center shaft 7, which is arranged on the outer periphery of the center shaft 7.
Rubber elastic body 10 having flange-shaped portions 10b, 10b integrally connected to both ends of the cylindrical portion 10a in the axial direction corresponding to the flange-shaped portions 7b, 7b at both ends of the central shaft 7 to enclose the cylindrical shaft 10a.
And both end flange portions 10b, 10b of the rubber elastic body 10
And an outer cylinder 11 made of a thin metal plate that covers the entire outer peripheral surface including the outer cylinder 11.

As shown in FIG. 2, notches 12 and 12 are formed at two locations in the diameter direction of the rubber elastic body 10 in the vibration-proof rubber bush 6, thereby allowing the rubber elastic body 10 to move in the vehicle direction. Two blocks 10 in the direction Y
A and 10B, and the outer cylinder 11 is divided into two parts corresponding to this, and the divided outer cylinder bodies 11A and 11B are fixed to the outer peripheral surfaces of the block bodies 10A and 10B, respectively.

In the vibration-proof rubber bush 6 having the above-mentioned structure, one of the outer cylinders 11A of the outer cylinder 11 in the axial center portion of the outer cylinder 11 has a bottomed cylindrical projection 12 projecting radially outward by press working. Are formed integrally, while the convex portion 1 is formed on the inner peripheral side of one half body 4A of the cylindrical housing portion 4.
A concave portion 13 is formed at a position corresponding to 2.

In the railcar axle beam device provided with each of the above components, the outer cylinder 11 of the vibration-proof rubber bush 6 is fitted into the other half body 4B of the cylindrical housing part 4 in a half-shape. The central shaft 7 is fitted into the hole 5 and
Are fixed to the bogie frame 8 so as not to rotate, and the concave portion 13 is formed on the convex portion 12 of the vibration-proof rubber bush 6 projecting radially outward from one of the divided outer cylinders 11A of the outer cylinder 11. By fastening one half 4A of the cylindrical housing portion 4 to the other half 4B via a bolt 9 so as to engage with the cylindrical rubber elastic body 10 of the vibration-proof rubber bush 6, , A pre-compression is applied, and the assembled state in which the relative slip between the cylindrical rubber elastic body 10 and the cylindrical housing portion 4 is prevented can be obtained.

According to the railway beam shaft apparatus in such an assembled state, when the axle 1 and the bogie frame 8 are relatively displaced up and down, the elastic action of the cylindrical rubber elastic body 10 of the vibration-proof rubber bush 6 occurs. A predetermined vibration-proof function, such as allowing rotation of the shaft beam 3 around the central axis 7 and properly absorbing vibration and impact at each connection portion between the shaft beam 3 and the bogie frame 8, is reliably exhibited. Will be.

In the above-described embodiment, the vibration-proof rubber bush 6 is described with the outer cylinder 11 having the bottomed cylindrical projection 12 projecting radially outward from one of the divided outer cylinders 11A of the outer cylinder 11. As shown in FIG. 4, a hole 12a is formed in the axial center of one of the divided outer cylinders 11A of the outer cylinder 11, and the convex portion 12 is formed by burring processing in which the edge of the hole 12a is expanded into a cylindrical shape. Even if it does, it is possible to exhibit the same anti-slip function as in the above embodiment.

Further, in the above-described embodiment, the case where the cylindrical rubber elastic body 10 in the vibration-proof rubber bush 6 is divided into the two block bodies 10A and 10B in the vehicle traveling direction Y has been described. May be divided into blocks.

[0018]

As described above, in summary, the present invention allows a rotational movement about the center axis of a shaft beam based on the elastic action of a cylindrical rubber elastic body of a vibration-proof rubber bush, As a measure to prevent relative slippage between the cylindrical rubber elastic body and the cylindrical housing part, which is indispensable for reliably exhibiting the vibration damping function of absorbing vibration and shock at the connection part with the frame, A configuration is adopted in which a convex portion formed by press working on a part of the outer cylinder is engaged with a concave portion formed on the inner peripheral side of the cylindrical housing portion, so that it is separate from the cylindrical rubber elastic body and the cylindrical housing portion. It is possible to reduce the number of parts by eliminating the use of engaging pins, which are small parts, and to reduce the number of assembly steps by eliminating the need for driving pins. In addition, since it is not necessary to form a pin hole that generates stress concentration that causes cracks or the like in the rubber elastic body of the vibration isolating rubber bush, the shaft vibration is secured by securing the vibration isolating function as specified for a long period of time. There is an effect that the durability of the entire apparatus can be improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a railcar axle beam device according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional side view of a main part of the same device.

FIG. 3 is an enlarged cross-sectional plan view of a main part of the same device.

FIG. 4 is an enlarged cross-sectional plan view of a main part of a railcar axle beam device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Axle 2 Axle box part 3 Axle beam 4 Cylindrical housing part 4A, 4B Half body 6 Vibration-proof rubber bush 7 Center shaft 8 Dolly frame 10 Rubber elastic body 11 Outer cylinder 12 Convex part 13 Concave part

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[Procedure amendment]

[Submission date] September 30, 1999 (September 9, 1999
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Anti-vibration rubber bush for railway vehicle axle beam device

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration rubber bush for a railroad vehicle axle beam device, and more particularly, to one end of an axle beam extending in a vehicle traveling direction from an axle box portion supporting an axle of a railroad vehicle. The present invention relates to an anti-vibration rubber bush for a railroad vehicle shaft beam device that is used to be connected to one end portion of a shaft beam and a bogie frame when connected and supported.

[0002]

2. Description of the Related Art This type of railcar shaft beam device is arranged and fixed to a cylindrical housing portion provided at one end of the shaft beam at a center axis perpendicular to a vehicle traveling direction and at an outer periphery of the center shaft. A vibration-proof rubber bush consisting of a cylindrical rubber elastic body formed and an outer cylinder fixed so as to cover the entire outer peripheral surface of the cylindrical rubber elastic body is fitted and fixed, and the center axis of the vibration-proof rubber bush is fixed. By being fixed to the bogie frame so as not to be rotatable, rotation of the shaft beam about the central axis of the shaft beam is allowed based on the elastic action of the cylindrical rubber elastic body of the vibration-isolating rubber bush, and the connecting portion between the shaft beam and the bogie frame It exhibits a vibration-proof function such as absorbing vibrations and shocks.

In order to reliably exert the above-described vibration damping function, it is necessary to prevent relative slippage between the cylindrical rubber elastic body and the cylindrical housing portion during the rotation about the central axis of the shaft beam. As a countermeasure for preventing relative slippage, conventionally, as disclosed in Japanese Utility Model Application Laid-Open No. Hei 6-23863, for example, a pin hole is provided on the inner peripheral side of a housing portion, and a pin hole is fixed by being pushed into the pin hole. Means has been adopted in which a pin hole in which a protruding portion of the mating pin is inwardly engaged is formed in the outer cylinder and the cylindrical rubber elastic body of the vibration-proof rubber bush.

[0004]

However, in the conventional railcar axle beam device as described above, not only the inner peripheral side of the cylindrical housing portion but also the outer cylinder and the cylindrical rubber elastic body side of the vibration-proof rubber bush. It is not only necessary to precisely form the pin holes so that there is no misalignment, but also, after the engaging pins are pushed and fixed in the pin holes of the cylindrical housing, Is troublesome assembling such that the protruding portion engages with the pin holes on the outer cylinder and the cylindrical rubber elastic body side of the vibration-proof rubber bush. Moreover,
Stress concentrates on the pin hole portion on the rubber elastic body side via the engaging pin, so that the rubber elastic body is easily cracked or the like, and the predetermined vibration isolating function cannot be maintained for a long period of time. There was a problem of lack of durability.

The present invention has been made in view of the above circumstances, and can reduce the number of processing, the number of parts, and the number of assembling steps. An object of the present invention is to provide an anti-vibration rubber bush for a railway beam shaft device capable of improving durability.

[0006]

In order to achieve the above object, a vibration isolating rubber bush for a railcar axle beam device according to the present invention is provided with a center axis perpendicular to a vehicle traveling direction and an outer periphery of the center axis. An anti-vibration rubber bush having a cylindrical rubber elastic body disposed and fixed and an outer cylinder fixed so as to cover the entire outer peripheral surface of the cylindrical rubber elastic body, wherein the outer cylinder is an axle of a railway vehicle. Axle beam extending from the axle box portion in the vehicle traveling direction to the end portion of the shaft beam is disposed continuously in a horizontal posture perpendicular to the vehicle traveling direction, and is divided into two halves in the vehicle traveling direction. In a vibration-absorbing rubber bush for a railroad vehicle axle beam device, the body is fitted and fixed to a cylindrical housing portion that can be fastened to each other, and the center axis thereof is fixed to the bogie frame so as not to rotate. Pressed part of the cylinder to protrude radially outward The cylindrical rubber elastic body and the cylinder at the time of the rotational movement around the central axis of the shaft beam are formed by forming a convex portion that engages with a concave portion formed on the inner peripheral side of the cylindrical housing portion. Characterized in that it is configured to prevent relative sliding with the housing.

According to the present invention having the above-described structure, the protrusion formed by pressing the part of the outer cylinder of the vibration-isolating rubber bush is engaged with the recess formed on the inner peripheral side of the cylindrical housing part. By doing so, it is possible to prevent relative slippage between the cylindrical rubber elastic body and the cylindrical housing part during rotational movement about the central axis of the shaft beam, and to prevent relative slippage with the cylindrical rubber elastic body. The use of an engaging pin, which is a small part separate from the cylindrical housing part, becomes unnecessary, so that not only the number of parts but also the number of assembly steps can be reduced. In addition, since it is not necessary to provide a pin hole in the rubber elastic body of the vibration-proof rubber bush, stress concentration that may cause a crack or the like does not occur in the rubber elastic body, and the vibration-proof function as specified can be performed for a long period of time. Thus, it is possible to improve the durability of the entire shaft beam device .

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view of a railroad vehicle axle beam device according to an embodiment of the present invention, and shows an axle beam from an axle box portion 2 supporting an axle 1 of a railroad vehicle in a vehicle traveling direction (arrow Y direction). A cylindrical housing 4 is connected to one end of the shaft beam 3.
An outer cylinder 11 of an anti-vibration rubber bush 6, which will be described later, is fitted and fixed in a fitting hole 5 of the cylindrical housing portion 4, and both ends of the center shaft 7 of the anti-vibration rubber bush 6 are connected to a bogie frame 8.
Fixed to the central axis 7 of the beam 3
It is configured to allow a rotational movement around and absorb vibrations and shocks at a connecting portion between the shaft beam 3 and the bogie frame 8.

The housing portion 4 is a half-split type which is divided into two in the vehicle traveling direction Y. One half-split body 4A is integrated with the shaft beam 3 as shown in FIG. 4B can be fastened to the rubber elastic body 10 of the anti-vibration rubber bush 6 by applying a predetermined tightening force to the anti-vibration rubber bush 6 at the time of the fastening. It is configured to add.

The vibration-proof rubber bush 6 is shown in FIGS.
As shown in FIG. 5, a central shaft 7 integrally formed with flange portions 7b, 7b at both axial ends of a mandrel portion 7a having a solid cross section and arranged in a horizontal posture perpendicular to the vehicle traveling direction Y, A mandrel 7 a of the center shaft 7, which is arranged on the outer periphery of the center shaft 7.
Rubber elastic body 10 having flange-shaped portions 10b, 10b integrally connected to both ends of the cylindrical portion 10a in the axial direction corresponding to the flange-shaped portions 7b, 7b at both ends of the central shaft 7 to enclose the cylindrical shaft 10a.
And both end flange portions 10b, 10b of the rubber elastic body 10
And an outer cylinder 11 made of a thin metal plate that covers the entire outer peripheral surface including the outer cylinder 11.

As shown in FIG. 2, notches 12, 12 are formed at two locations in the diameter direction of the rubber elastic body 10 in the vibration-proof rubber bush 6, so that the rubber elastic body 10 can travel in the vehicle. Two blocks 10 in the direction Y
A and 10B, and the outer cylinder 11 is divided into two parts corresponding to this, and the divided outer cylinder bodies 11A and 11B are fixed to the outer peripheral surfaces of the block bodies 10A and 10B, respectively.

In the vibration-proof rubber bush 6 having the above construction, a bottomed cylindrical projection 14 projecting radially outward by press working is provided at a central portion of one of the outer cylinders 11A of the outer cylinder 11 in the axial direction. Are formed integrally, while the convex portion 1 is formed on the inner peripheral side of one half body 4A of the cylindrical housing portion 4.
A recess 13 is formed at a location corresponding to 4 .

In the railcar axle beam device having the above components, the outer cylinder 11 of the vibration-proof rubber bush 6 is fitted into the other half body 4B of the cylindrical housing part 4 in a half-shape. The central shaft 7 is fitted into the hole 5 and
Are fixed to the bogie frame 8 so that they cannot rotate, and the concave portion 13 is formed on the convex portion 14 of the anti-vibration rubber bush 6 projecting radially outward from one of the divided outer cylinders 11A of the outer cylinder 11. By fastening one half 4A of the cylindrical housing portion 4 to the other half 4B via a bolt 9 so as to engage with the cylindrical rubber elastic body 10 of the vibration-proof rubber bush 6, , A pre-compression is applied, and the assembled state in which the relative slip between the cylindrical rubber elastic body 10 and the cylindrical housing portion 4 is prevented can be obtained.

According to the railcar axle beam device in such an assembled state, when the axle 1 and the bogie frame 8 are vertically displaced relative to each other, the elastic action of the cylindrical rubber elastic body 10 of the vibration-proof rubber bush 6 is used. A predetermined vibration-proof function, such as allowing rotation of the shaft beam 3 around the central axis 7 and properly absorbing vibration and impact at each connection portion between the shaft beam 3 and the bogie frame 8, is reliably exhibited. Will be.

In the above embodiment, the rubber elastic body 10 in the vibration- proof rubber bush 6 is divided into two blocks 10A and 10B in the vehicle traveling direction Y. May be divided into blocks.

[0016]

As described above, in summary, the present invention allows a rotational movement about the center axis of a shaft beam based on the elastic action of a cylindrical rubber elastic body of a vibration-proof rubber bush, As a measure to prevent relative slippage between the cylindrical rubber elastic body and the cylindrical housing part, which is indispensable for reliably exhibiting the vibration damping function of absorbing vibration and shock at the connection part with the frame, A configuration is adopted in which a convex portion formed by press working on a part of the outer cylinder is engaged with a concave portion formed on the inner peripheral side of the cylindrical housing portion, so that it is separate from the cylindrical rubber elastic body and the cylindrical housing portion. It is possible to reduce the number of parts by eliminating the use of engaging pins, which are small parts, and to reduce the number of assembly steps by eliminating the need for driving pins. In addition, since it is not necessary to form a pin hole that generates stress concentration that causes cracks or the like in the rubber elastic body of the vibration isolating rubber bush, the shaft vibration is secured by securing the vibration isolating function as specified for a long period of time. There is an effect that the durability of the entire apparatus can be improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a railcar axle beam device according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional side view of a main part of the same device.

FIG. 3 is an enlarged cross-sectional plan view of a main part of the same device .

[Description of Signs] 1 Axle 2 Axle box 3 Shaft 4 Cylindrical housing 4A, 4B Half body 6 Anti-vibration rubber bush 7 Center shaft 8 Truck frame 10 Rubber elastic body 11 Outer cylinder 13 Concave part 14 Convex part

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

[Procedure amendment 4]

[Document name to be amended] Drawing

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[Correction method] Deleted

Claims (2)

[Claims] 1. A central axis perpendicular to a traveling direction of a vehicle, a cylindrical rubber elastic body disposed and fixed on the outer periphery of the central axis, and fixed so as to cover the entire outer peripheral surface of the cylindrical rubber elastic body. A rubber bush having an outer cylinder, the outer cylinder being perpendicular to the vehicle traveling direction at the end of a shaft beam extending in the vehicle traveling direction from the axle box portion supporting the axle of the railway vehicle. In a horizontal position, and the two divided halves in the vehicle traveling direction are fitted and fixed to a cylindrical housing part which can be fastened to each other, and the center axis thereof is connected to the bogie frame. In a vibration damping rubber bush for a railway vehicle shaft beam device that is fixedly used non-rotatably, a convex portion projecting radially outward is formed on a part of the outer cylinder by press working, and the convex portion is formed in the cylindrical housing. By engaging with the concave part formed on the inner peripheral side of the part, Serial axis beam central axis cylindrical rubber elastic body and the railcar axis beam device for vibration damping rubber bushing, characterized in that is configured to prevent relative sliding between the cylindrical housing during rotation motion about the. 2. The anti-vibration rubber bush for an axle beam device of a railway vehicle according to claim 1, wherein the convex portion of the outer cylinder is formed by burring.