KR20020061487A - Dust-proof rubber bush assembly for connecting shaft beam of a railway vehicle - Google Patents

Abstract

PURPOSE: To provide a vibration control rubber bushing assembly which can be assembled in a assembly site with ease even if it is provided with expanded opening collar-shaped sections at both axial ends and used as a vibration control rubber bushing used for connecting a shaft beam and a bogie frame in a rolling stock. CONSTITUTION: The vibration control rubber bushing assembly 26 comprises a center shaft body 28 as an inner metal fixture having collar shaped sections 42, a vibration control rubber bushing 36 provided with a rubber elastic body 38 having a collar shaped section 50 fixed to the external peripheral face of the center shaft body 28 and an outer metal fixture 40 divided into two parts in the direction orthogonal to the axis, and a press fitting assembly member 68. The press fitting assembly member 68 is provided with an outer block 70, which is divided into two parts in the direction orthogonal to the axis for giving pressure compression to the rubber elastic body 38 by the clamping force in the direction orthogonal to the axis, and an outer ring 72 for restricting the outer block 70. The assembly 26 in this state is press-fitted in the cylindrical housing section of the shaft beam.

Description

DUST-PROOF RUBBER BUSH ASSEMBLY FOR CONNECTING SHAFT BEAM OF A RAILWAY VEHICLE}

The present invention relates to an anti-vibration rubber bush assembly for use in connection to a stepped frame of an axial beam end of a railway vehicle, specifically, an axial beam end extending in the front-rear direction from an axial part supporting the axle.

Background Art Conventionally, in a railroad car, the shaft beam extends in the front-rear direction from an axial portion supporting the axle, and its end portion is connected to the bogie frame through the anti-vibration rubber bush.

12 shows an example thereof.

In the same drawing, reference numeral 200 denotes a bogie frame, 202 a wheel, and 204 an axle, and the axial beam 206 extends in the front-rear direction from an axial portion 205 supporting the axle 204.

The cylindrical housing part 208 is formed in the edge part of the axial beam 206, and the dustproof rubber bush 210 is fitted and fixed to this housing part 208. As shown in FIG.

The anti-vibration rubber bush 210 is composed of a central shaft 212, a rubber elastic body 214 arranged outside thereof, and an outer bracket 216 fixed to an outer circumferential surface of the rubber elastic body 214. In the housing portion 208 of the shaft beam 206 and fixed to the bogie frame 200 in the central shaft 212.

In this type of connecting device, the rotational movement of the axial beam 206 around the central shaft 212 is allowed based on the elastic action of the anti-vibration rubber bush 210, and at the same time, the connecting portion of the axial beam 206 and the bogie frame 200 is connected. Vibration and shock are well absorbed from above.

Therefore, in order to impart good durability to the dustproof rubber bush, preliminary compression is usually applied to it.

In this case, if the anti-vibration rubber bush is shaped as shown in Fig. 12B, i.e., the outer bracket 218 is cylindrical in shape and straight in the axial direction, the anti-vibration rubber bush is fixed. By carrying out the drawing processing with the drawing values, the necessary preliminary compression can be easily given.

However, as shown in (b) of FIG. 12B, when the anti-vibration rubber bushes do not have the same shape in the axial direction, that is, the inner bracket 222, the rubber elastic body 224, and the outer bracket 220 ) Each have an extension-shaped blade-shaped portion 226 at both ends in the axial direction, it is difficult to perform the drawing processing, and it is practically difficult to apply preliminary compression to the dustproof rubber bush by such drawing processing.

In this case, as shown in FIG. 13, the outer bracket 216 is divided into two in the axially perpendicular direction (two divisions in the illustrated example), while the housing portion 208 at the end of the shaft beam 206 is divided into half sections ( 228A) and the half-divided body 228B, and the two bolts are fastened in the axially perpendicular direction with the fastening bolts 230, and then the dustproof rubber bushes 210 are tightened in the axially perpendicular direction. It is possible to impart preliminary compression for 210.

In this case, however, the housing portion 208 at the end of the axial beam 206 should be divided into the half partition 228A and the half partition 228B, and at the same time, the axial beam 206 of the dustproof rubber bush 210 is formed. When assembling to the end, the dustproof rubber bush 210 is set in the forward direction, and then the half partition 228A and the half partition 228B must be fastened by tightening the fastening bolt 230, so that the process at the assembly site is performed. The problem that the assembly workability is not good because it becomes cumbersome and many days.

For example, as shown in FIG. 13, when the outer bracket 216 is divided in the left-right direction, ie, the fastening direction of the half division 228A and the half division 228B in a figure, there is no problem. In the case where the outer bracket 216 is divided in the direction perpendicular to the cross direction, the direction of preliminary compression with respect to the anti-vibration rubber bush 210 and the fastening direction of the half body 228A and 228B are different, so that the assembly workability is further improved. Problems get worse.

1 is a view showing a state in which the axial beam in the railway vehicle is connected to the bogie frame through the anti-vibration rubber bush assembly of the present embodiment.

Fig. 2 is a view showing the dustproof rubber bush assembly and its periphery of the same embodiment.

3 is a front view showing a dustproof rubber bushing assembly of the same embodiment in an assembled state and a side view showing a cut away.

4 is a cross-sectional view along the line A-A and B-B in FIG.

Fig. 5 is a cross-sectional view showing the dustproof rubber bush assembly of the same embodiment before the outer ring is fitted.

Figure 6 is a perspective view showing the dustproof rubber bushing assembly of the same embodiment in an appearance state.

7 is an exploded perspective view showing the dust-proof rubber bush assembly of the same embodiment in a disassembled manner.

FIG. 8 is an exploded perspective view showing the outer bracket in FIG. 7 assembled;

FIG. 9 is an exploded perspective view showing the outer block in FIG. 8 assembled;

10 is a view showing another embodiment of the present invention.

FIG. 11 is an exploded perspective view illustrating the dust-proof rubber bush assembly in FIG. 10 disassembled into respective members. FIG.

12 is a view showing a connection structure between the axis beam and the bogie frame using a conventional anti-vibration rubber bush.

FIG. 13 is a view showing a dustproof rubber bush and its peripheral portion in FIG. 12. FIG.

* Explanation of symbols for the main parts of the drawings *

18: shaft beam 24: housing portion

26: dustproof rubber bush assembly 28: central shaft (inner bracket)

36: dustproof rubber bush 38: rubber elastomer

40: outer bracket 42, 50, 62: blade shape

64: stopper 66: stopper bracket

68: press-fit assembly member 70: outer block

72: outer ring 78: press fit surface

The anti-vibration rubber bush assembly for connecting the axial beam of the railway vehicle of the present invention is devised to solve such a problem.

Therefore, Claim 1 is characterized in that (A) (a) an inner bracket having an extended blade shape at both ends of the axial direction, and (b) a blade shape of the inner bracket at both axial ends fixed to the outer circumferential surface of the inner bracket. A dust-proof rubber bush having a rubber elastic body having a corresponding blade-shaped portion, and (c) an outer bracket divided into a plurality of axially perpendicular directions having an enlarged inner surface of a shape corresponding to the blade-shaped portion of the rubber elastic body at both axial ends thereof; (B) It is fixed in the axial direction with respect to the anti-vibration rubber bush, and has a press-fit assembly member for press-assembling the anti-vibration rubber bush in the cylindrical housing portion in the axial beam of the railway vehicle. The press-fit assembly member is divided into plural in the axially perpendicular direction to provide a rigid outer block for preliminary compression in the axially perpendicular direction with respect to the rubber elastic body by the tightening force in the axially perpendicular direction. And a press-fitting fitting surface which is substantially linear in this axial direction, which is pressed in the axial direction with respect to the inner circumferential surface of the housing part, and is formed on the outer circumferential surface of the press-fitting assembly member. It is characterized in that it is made to assemble fixed to the axis beam in a pre-compressed state.

2. The blade of claim 1, wherein the outer bracket is formed of a plate-shaped member that is separate from the outer block and is relatively thin with respect to the outer block. It has a corresponding blade-shaped part, The inside surface is vulcanized by this rubber elastic body, It is characterized by the above-mentioned.

Claim 3 is characterized in that the press-fitting assembly member has an annular shape and is fitted outside the outer block, and further includes an outer ring for restraining the outer block in the tightened state.

The method according to claim 2, characterized in that the press-fit assembly member further includes an outer ring which is formed in a ring shape and fitted to the outer block and restrains the outer block in the tightened state.

In Claim 3, the said press-fitting surface is formed in the outer peripheral surface of the said outer ring, It is characterized by the above-mentioned.

Claim 6 is characterized in that the press-fitting face is formed on the outer peripheral surface of the outer ring.

The vibration-proof rubber bush assembly according to any one of claims 1 to 6, wherein the anti-vibration rubber bushing assembly has a stopper for preventing excessive deformation of the rubber elastic body in the front-back direction position, which is the relative displacement direction of the inner bracket during the brake action. It is characterized by being vulcanized integrally.

Claim 8 is characterized in that the stopper is vulcanized and bonded to the inner bracket of the dustproof rubber bush.

9. The stopper according to claim 8, wherein the stopper has a stopper bracket and a rubber elastic body, and the stopper bracket contacts the outer block to achieve a stopper action during a brake action.

(Actions and effects)

As described above, the anti-vibration rubber bush assembly of claim 1 is provided with an anti-vibration rubber bush including inner and outer brackets each having a blade-shaped portion at both ends thereof in an axial direction, and rubber elastic bodies sandwiched therebetween, and anti-vibration rubber bushes And a press-fit assembly member for press-fitting the bush in the cylindrical housing portion in the axial beam in the axial direction, and also with a tightening force by the rigid outer block divided into a plurality of axes in the axial direction in the press-fit assembly member. The rubber elastic body is preliminarily compressed in the axially perpendicular direction, and in such a state, the dustproof rubber bushing assembly is press-fitted into the cylindrical housing portion of the axial beam at the press-fit fitting surface formed on the outer circumferential surface of the press-fitting assembly member. In this case, the axial beam end portion, i.e., the housing portion, is merely pushed into the cylindrical housing portion. Assembly can be fixed.

That is, according to the present invention, a complicated and cumbersome work of dividing the cylindrical housing part of the axial beam end into half-divided bodies and fastening it with a fastening bolt at the assembly site, and then applying preliminary compression to the dustproof rubber bush at that time. The assembly workability of the anti-vibration rubber bush at the assembly site is dramatically improved.

In the present invention, the outer block of the press-fit assembly member, which is conventionally composed of a clamping of the anti-vibration rubber bush, ie, preliminary compression in the axially perpendicular direction, implemented by the half-split bodies 228A and 228B constituting the housing part in the assembly site. It can be considered that it is made to carry out.

In this way, it is possible to easily realize the vibration-proof rubber bush to be assembled and fixed in the housing portion of the axial beam end just by pressing it in, and also to give a preliminary compression to the rubber-elastic material in detail.

In addition, since preliminary compression is not given to the rubber elastic body by tightening the half-divided bodies 228A and 228B at the same time, there is no problem and it is simple regardless of the assembly direction (rotation direction side) of the anti-vibration rubber bush. The assembly work can be carried out in the housing part with preliminary compression.

In the present invention, the outer bracket of the anti-vibration rubber bush can be formed integrally with the outer block made of metal, but the outer bracket is separate from the outer block and is formed of a plate-shaped member having a relatively thin thickness with respect to the outer block. In addition, blade-shaped portions can be formed at both ends of the axial direction, and the rubber surface can be vulcanized and adhered to the rubber elastic body (claim 2).

In addition, the press-fit fitting surface of the outer circumferential surface of the press-fit assembly member may be formed on the outer circumferential surface of the outer block.

Alternatively, as an constituent of the press-fitting assembly member, an outer ring may be formed outside the outer block to restrain the clamping state (claim 3, claim 4).

In this way, the anti-vibration rubber bush and the outer block can be preassembled to the anti-vibration rubber bush and the outer block in a restrained state while the outer block tightens the rubber elastic body in the axially perpendicular direction to give preliminary compression. The assembly workability of the axial beam end (housing part) can be further improved.

In the case of using the outer ring in this manner, the press-fitting surface can be formed on the outer circumferential surface of the outer ring (claim 5, claim 6).

In addition, when the press-fitting fitting surface is formed on the outer circumferential surface of the outer ring, that is, when the outer ring is press-fitted directly into the cylindrical housing portion of the axial beam, the outer ring remains as assembled to the axial beam even after assembly. .

However, when the press-fit fitting surface is formed on the outer circumferential surface of the outer block to directly press the outer block into the cylindrical housing, the outer ring can be separated after assembly.

In this case, the outer ring only achieves the role of restraining the outer block in the tightened state until the dustproof rubber bush is assembled to the shaft beam.

Subsequently, claim 7 is a vulcanized-integral stopper for preventing excessive deformation of the rubber elastic body in the front-back direction position, which is the relative displacement direction of the inner bracket during brake action, to the anti-vibration rubber bush assembly.

In recent years, high speed is progressing in railroad cars, and the anti-vibration rubber bush is being purified by low spring.

In addition, there is a tendency for single braking to be applied to brake the wheels only in one direction before and after.

In this case, a large load is applied to the anti-vibration rubber bush in the front-rear direction during the brake action.

Therefore, when the spring constant of the anti-vibration rubber bush is made flexible (small), the rubber elastic body is greatly deformed back and forth during the brake action, causing not only the durability life of the anti-vibration rubber bush but also deteriorating the effect of the brake.

In the present invention, the stopper for preventing excessive deformation of the rubber elastic body is vulcanized and integrally bonded to the anti-vibration rubber bush assembly, thereby extending the durability life of the anti-vibration rubber bush and at the same time achieving the effect of the brake itself well. can do.

It is also conceivable to attach the stopper to the back of the anti-vibration rubber bushing assembly with bolts or the like. In this case, the production process of the anti-vibration rubber bushing assembly including the assembly of the stopper increases, resulting in deterioration of productivity and tightening by bolts. Insufficiency may cause the stopper to fall off during use.

In the present invention, since the stopper is integrally formed with the anti-vibration rubber bush assembly by vulcanization, the bolt is loosened except that the number of manufacturing steps of the anti-vibration rubber bush assembly including the stopper is small and the productivity is good. It is also possible to eliminate the possibility of the stopper falling off during use.

In this case, the stopper can be vulcanized integrally to the dustproof rubber bush itself, and in particular, it can be vulcanized integrally to the inner bracket (claim 8).

The stopper may be composed of a stopper bracket and a rubber elastic body, and the stopper bracket may be configured to contact the outer block to achieve a stopper action (claim 9).

In these claims 1 to 9, the rubber elastic body can be formed in a continuous form from one end in the axial direction to the other end.

In addition, the outer block or the outer bracket can also be formed in a continuous form from one end in the axial direction to the other end.

(Example)

Next, the Example of this invention is described in detail based on drawing.

In Fig. 1, reference numeral 10 denotes a bogie frame, reference numeral 12 denotes a wheel, reference numeral 14 denotes an axle shaft, and an axial beam 18 extends from an axial portion 16 supporting the axle 14.

Reference numeral 20 denotes a shaft spring, and reference numeral 22 denotes a brake device.

As shown, in this example, the brake device 22 is formed in only one of the front and rear directions of the wheel 12, that is, only on one side, and the brake shoe 23 is extruded only on one side of the front and rear with respect to the wheel 12. The wheel 12 is braked. That is, in this example, it is a single brake.

The cylindrical housing part 24 is formed in the edge part of the axial beam 18, and the dustproof rubber bush 36 (refer FIG. 3) fits inside the housing part 24 in the state of the assembly 26. As shown in FIG. It is fixed.

The arm 30 of the trolley frame 10 is fixed by the bolt 32 and the nut 34 with respect to the central shaft body 28 in the anti-vibration rubber bush 36.

In this example, the central shaft 28 constitutes the inner bracket of the anti-vibration rubber bush 36.

2, the housing part 24 has comprised the cylindrical shape of the form continuous in the circumferential direction.

In this example, the connecting device of the axial beam 18 and the bogie frame 10 includes the cylindrical housing portion 24 formed at the end of the axial beam 18, the dustproof rubber bush assembly 26, and the bogie frame 10. It consists of the arm 30, the bolt 32, and the nut 34. As shown in FIG.

3, 4, 5, and 6 to 8 show a specific configuration of the dustproof rubber bush assembly 26.

First, in Fig. 3, reference numeral 36 denotes an anti-vibration rubber bush, and the anti-vibration rubber bush 36 is a rubber elastic body 38 integrally fixed to the central shaft body 28 constituting the inner bracket and to the outer peripheral surface thereof by vulcanization. And an outer bracket 40 which is integrally fixed to the outer peripheral surface of the rubber elastic body 38 by vulcanization.

The central shaft body 28 as an inner bracket has an inner-filled structure and has a pair of blade-shaped portions 42 extending in both axial directions.

The central shaft body 28 is an axis in which the intermediate shaft portion 44 between the blade-shaped portion 42 and the blade-shaped portion 42 forms a cross-sectional shape and protrudes outwardly from the blade-shaped portion 42 in the axial direction. As shown in Fig. 3 (a) and Figs. 6 to 8, the end portion 46 is almost trapezoidal in cross section.

These shaft end portions 46 are provided with fixing holes 48 penetrating in the vertical direction in the drawing, and the bolts 32 and the nuts 34 at the bogie frame 10 side in the fixing holes 48. It is fixed to the arm 30.

As shown in Fig. 3B, the rubber elastic body 38 has an expanded blade-shaped portion 50 corresponding to the blade-shaped portion 42 in the central shaft body 28 at both ends in the axial direction. have.

In addition, as the portion between the blade-shaped portion 50 and the blade-shaped portion 50 is shown in Fig. 4B, the upper portion 52, the lower portion 54 and the intermediate portion 56, 58 are formed. It is partitioned.

A shallow V-shaped notch 60 is formed between these upper portions 52, lower portions 54 and the intermediate portion 56.

And the outer bracket 40 is integrally fixed to the outer peripheral surfaces of the upper part 52 and the lower part 54 by vulcanization bonding over their entire circumference.

As shown in Fig. 4B, the outer bracket 40 has a shape divided into two in the axial perpendicular direction, and is fixed to the upper portion 52 and the lower portion 54, respectively.

As shown in Fig. 3 (b), these pairs of outer brackets 40 also have blade-shaped portions 62 that are expanded at both ends in the axial direction, and the surface is expanded inside the blade-shaped portion 62. The blade-shaped portion 50 in the rubber elastic body 38 is sandwiched between the blade-shaped portion 62 and the blade-shaped portion 42 in the central shaft body 28.

The outer circumferential surface of the upper portion 52 and the lower portion 54 of the rubber elastic body 38 has an arc shape, and the outer bracket 40 also has an arc shape correspondingly.

As shown in Fig. 4B, the stopper bracket 66 is integrally fixed to the outer circumferential surface of the intermediate portion 58 on one side by vulcanization, and the intermediate portion 58 and the stopper bracket ( 66, a stopper 64 is formed.

This stopper 64 makes a stopper action by touching the stopper bracket 66 to the outer block 70 described later during the brake action, and prevents excessive deformation of the rubber elastic body 38 during the brake action.

As shown in FIG. 4B, the stopper 64 is vulcanized and integrally bonded to the central shaft body 28 on one side in the front-rear direction of the central shaft body 28.

In this example, the anti-vibration rubber bush assembly 26 is provided on the inner circumferential surface 76 (see FIG. 2) of the anti-vibration rubber bush 36 having the above-described configuration and the cylindrical housing portion 24 at the end of the axial beam 18 described above. And a press-fit assembly member 68 for press-fitting in the axial direction.

As shown in Fig. 3B, the press-fit assembly member 68 has a rigid (metal) outer block 70 constituting the main body and a pair of metal outer rings 72.

As shown in Figs. 4, 7 and 8, the outer block 70 has a semicylindrical shape in which a cylindrical body is divided into two in the axially perpendicular direction, and each of the outer blocks 70 is disposed on the outer circumferential surface of the upper and lower pairs of outer brackets 40 outside. It is fitted in the fitted state.

These pairs of outer blocks 70 are for preliminarily compressing the anti-vibration rubber bush 36, in particular, the rubber elastic body 38 in the axially perpendicular direction with a predetermined tightening value, as shown in FIG. As shown in Fig. 1), the gaps S necessary for applying the preliminary compression are provided so as to face each other up and down.

As shown in Figs. 5, 7, 8, and 9 at the axial ends of the pair of outer blocks 70, shallow fitting grooves 74 are formed therein, and a pair of outer rings 72 are located thereon. ) Are sandwiched from opposite sides of the axial direction.

These pairs of outer rings 72 restrain each outer block 70 in a state of preliminary compression in the axially perpendicular direction with respect to the rubber elastic body 38, and the outer circumferential surface thereof in the axial direction over the entire length in the axial direction. The press fit surface 78 which forms a straight shape is formed.

That is, these outer ring 72 has the outer peripheral surface protruding axially outward with respect to the outer peripheral surface of the outer block 70, and the outer peripheral surface of the whole protruding part becomes the press-fitting surface 78. As shown in FIG.

Next, the procedure at the time of assembling the dustproof rubber bush 36 of this example to the cylindrical housing part 24 of the edge part of the axial beam 18 is demonstrated below.

First, a dustproof rubber bush 36 formed by vulcanizing and bonding the central shaft body 28, the rubber elastic body 38, and the outer bracket 40 integrally is manufactured, and as shown in Figs. The outer block 70 is fitted to the outer surface of the outer bracket 40 in the rubber bush 36 by fitting.

Then, an external force is applied to the pair of upper and lower outer blocks 70 in the axial perpendicular direction to tighten the rubber elastic member 38 in the axial perpendicular direction to give a predetermined preliminary compression in the same direction.

5 and 9, the pair of outer rings 72 are inserted into the fitting grooves 74 from the front and rear in the axial direction with respect to the outer block 70, and the outer blocks 70 are shown in the state. The outer block 70 is restrained in the tightened state by the ring 72. That is, the rubber elastic body 38 is restrained in the pre-compressed state.

Fig. 6 shows the overall appearance of the dustproof rubber bush assembly 26 assembled in this way.

In order to assemble the dustproof rubber bush assembly 26 thus constructed into the housing portion 24 at the end of the shaft beam 18, it is only necessary to press this in the axial direction.

Then, when the arm 30 of the bogie frame 10 is fixed by the bolt 32 and the nut 34 with respect to the central shaft body 28 in the anti-vibration rubber bush 36, the axial beam 18 is dustproof. The rubber bush 36 is connected to the balance frame 10.

In the case of the anti-vibration rubber bush assembly 26 of the present example as described above, it can be assembled and fixed to the end of the axial beam 18, that is, the housing portion 24 only by pressing it into the cylindrical housing portion 24.

Therefore, according to the present example, the cylindrical housing portion 24 at the end of the shaft beam 18 is divided into half-divided bodies as in the prior art, and then fastened with a fastening bolt at the assembly site, where the dustproof rubber bush 36 It is possible to simply assemble the anti-vibration rubber bush 36 at the assembly site since no complicated and cumbersome work of preliminary compression is given.

In addition, without using the outer ring 72, the outer block 70 is fixed to the outer bracket 40 of the anti-vibration rubber bush 36 by suitable means (for example, with a bolt or the like), and the dust-proof rubber bush is fixed in that state. It is also possible to press-fit into the housing part 24 of the axial beam 18 in the press fit surface formed in the outer peripheral surface of the outer block 70 as an assembly.

In contrast, in the present example, the outer block 70 is restrained in advance in a state in which the preliminary preliminary compression is applied to the rubber elastic body 38 by using the outer ring 72. A proper amount of preliminary compression can be given, and the assembly workability is good at the time of assembly.

In addition, in this example, since the stopper 64 is vulcanized integrally to the anti-vibration rubber bush assembly 26, the rubber elastic body 38 deforms excessively during the brake action. It can prevent, and the advantage that the durability life of the dustproof rubber bush 36 can be extended effectively is acquired.

In addition, since the stopper 64 is integrally formed with the anti-vibration rubber bush 36 by vulcanization, the anti-vibration rubber bush 36 including the stopper 64 is different from the case where the stopper 64 is assembled with a bolt or the like. ) Is easy to manufacture, has high productivity, and has the advantage that the stopper 64 does not fall off during use by loosening of a bolt or the like.

In this example, the stopper 64 is formed only on one side in the front-rear direction of the central shaft body 28, but it is also possible to form the stopper 64 on both of the front and rear sides.

It is also possible to form the stopper 64 integrally on the outer block 70 side by vulcanization instead of the inner shaft body 28 side, which is an inner bracket.

In this example, since the rubber elastic body 38 is preliminarily compressed by tightening the rubber elastic body 38 from the outer block 70 in the axially perpendicular direction, the rubber elastic body 38 is provided at the other end in the axial direction. It can be configured in a continuous form over, thereby allowing the rubber volume of the rubber elastic body 38 to be large, and the tightening value can be large.

Therefore, there is an advantage that the spring constant of the rubber elastic body 38 itself can be set flexibly.

As mentioned above, the embodiment of the present invention has been described above. This is merely an example, and in the present invention, the dustproof rubber bush assembly may be configured in various forms other than the above examples.

For example, in the above example, the outer ring 72 protrudes outward from the outer circumferential surface of the outer block 70 in the axial direction so as to press-fit the outer circumferential surface of the outer ring 72 into the housing portion 24 of the axial beam 18. In some cases, however, the outer circumferential surface of the outer block 70 protrudes outward in the axially perpendicular direction than the outer circumferential surface of the outer ring 72 so that the outer circumferential surface is a press-fit fitting surface, which is press-fit into the housing portion of the shaft beam. It is also possible.

In addition, in this case, since the outer ring 72 fulfills its mission by press-fitting, it may be left as it is or may be separated after assembly.

In the above example, the central shaft 28 constitutes an inner bracket, but the inner bracket of the anti-vibration rubber bush can be configured separately from this.

Further, in some cases, the fitting groove is installed on the other side along the circumferential direction on one side of the inner circumferential surface of the outer ring 72 or the outer circumferential surface of the fitting groove 74 in the outer block 70 so as to fit. It is also possible.

By doing in this way, the fall off from the outer block 70 of the outer ring 72 can be prevented favorably.

It is also possible to form the outer ring by having an axial length over the entire axial length of the outer block, so that one outer ring can be formed to fit the outer block outer circumferential surface.

In this case, it is possible to bend both ends of the outer ring in the axial direction to prevent the fall.

In addition, the outer peripheral surface of the outer block can be a straight surface in the axial direction.

Further, in the above example, the outer bracket 40 and the outer block 70 of the anti-vibration rubber bush 36 are constituted by their respective members and at the same time they are separated from each other. The outer bracket 40 and the outer block 70 may be fixed in advance so that the outer block 70 may be vulcanized integrally with the rubber elastic body 38 together with the outer bracket 40, or further, in FIG. 10. As shown in the figure, the outer bracket 40 and the outer block 70 in the above embodiment may be formed as an integral molded product, that is, as shown in FIG. .

In addition, the outer block 70 may be a cast product, may be molded by forging, may be molded by cutting, or may be used as a constituent material of the outer block 70.

In addition, the present invention can be configured in a form in which various modifications are made without departing from the main purpose thereof.

Therefore, the present invention is an anti-vibration rubber bush used for connecting the axial beam and the bogie frame in a railroad vehicle, and can be easily assembled at an assembly site even when one having an extended blade-shaped portion at both ends in the axial direction is used. Provided is a rubber bush assembly.

Claims (9)

(A) (A) Inner brackets having blade-shaped sections extending on both axial ends thereof, and (b) Blade-shaped sections corresponding to the blade-shaped sections of the inner brackets on both axial ends fixed to the outer circumferential surface of the inner bracket. A dust-proof rubber bush having a rubber elastic body and (c) an outer bracket divided into a plurality of axially perpendicular directions each having an enlarged inner surface of a shape corresponding to the blade-shaped portion of the rubber elastic body at both axial ends thereof; (B) is fixedly axially mounted relative to the anti-vibration rubber bush, and has a press-fit assembly member for axially pressing and assembling the anti-vibration rubber bush in the cylindrical housing portion in the axial beam of the railway vehicle, The press-fit assembly member is divided into plural in the axially perpendicular direction, and includes a rigid outer block for preliminary compression in the axially perpendicular direction with respect to the rubber elastic body by the tightening force in the axially perpendicular direction. The outer circumferential surface of the axial beam is formed with a press-fitting fitting surface that is substantially linearly axially pressurized with respect to the inner circumferential surface of the housing part, and the rubber elastic body is precompressed by the outer block. Anti-vibration rubber bush assembly for connecting the axial beam of the railway vehicle, characterized in that the assembly is fixed to. The blade according to claim 1, wherein the outer bracket is formed of a plate-like member that is separate from the outer block and is relatively thin in thickness with respect to the outer block, and has blades corresponding to the blade-shaped portion of the rubber elastic body at both axial ends thereof. An anti-vibration rubber bush assembly for axial beam connection of a railway vehicle, having a shape and an inner surface vulcanized to the rubber elastic body. 2. The axial beam connection of a railway vehicle according to claim 1, wherein the press-fit assembly member further includes an outer ring which is annularly fitted to the outer block and restrains the outer block in the tightened state. Dustproof rubber bush assembly. 3. The axial beam connection of a railway vehicle according to claim 2, wherein the press-fitting assembly member has an annular shape and is fitted outside the outer block and restrains the outer block in the tightened state. Dustproof rubber bush assembly. 4. The dustproof rubber bush assembly for axial beam connection of a railway vehicle according to claim 3, wherein the press-fitting surface is formed on an outer circumferential surface of the outer ring. 5. The anti-vibration rubber bush assembly for axial beam connection of a railway vehicle according to claim 4, wherein the press-fitting surface is formed on an outer circumferential surface of the outer ring. 7. The anti-vibration rubber bush assembly according to any one of claims 1 to 6, wherein the anti-vibration rubber bushing assembly includes a stopper for preventing excessive deformation of the rubber elastic body in the front-back direction position, which is the relative displacement direction of the inner bracket during the brake action. An anti-vibration rubber bush assembly for connecting an axial beam of a railway vehicle, wherein the assembly is vulcanized. The anti-vibration rubber bush assembly for axial beam connection of a railway vehicle according to claim 7, wherein said stopper is vulcanized and bonded to the inner bracket of said anti-vibration rubber bush. 10. The anti-vibration rubber bush for connecting an axial beam of a railway vehicle according to claim 8, wherein the stopper has a stopper bracket and a rubber elastic body, and the stopper bracket contacts the outer block to act as a stopper when the brake is applied. Assembly.