JP2003191845A - Waterproof cover of axle box support device and waterproof device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof cover with large fixing force and excellent sealability of an axle box support device of a rolling stock. <P>SOLUTION: An annular engaging part 52 downward engaging into a recessed part 16 is formed on the rubber waterproof cover 32, which is fixed via a fixing plate 38 in a state to close an upper surface opening 34 of the recessed part 16 internally containing a damping rubber 20, of the axle box support device 14 of the rolling stock. An annular engaging groove 54 engaging with inner peripheral edge of the fixing plate 38 is formed on outer peripheral surface of the engaging part 52. The engaging groove 54 is elastically engaged with the whole inner peripheral edge of the fixing plate 38 for sealing and fixing. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof cover and a waterproof device for an axle box supporting device in a railway vehicle.

[0002]

2. Description of the Related Art Conventionally, in an axle box supporting device for a railway vehicle, a rubber waterproof cover is attached to prevent rainwater and the like from entering the recess of the axle box supporting device. ing. FIG. 8 shows an example of a conventional waterproof cover and waterproof device of the axle box supporting device.

In FIG. 8, reference numeral 200 denotes an axle box in which a bearing for rotatably supporting an axle is housed, 202 is a bogie frame, and 204 is an axle box supporting device. Axle box support device 204
In the recess 206, a coil spring 208 as a shaft spring and a damping rubber (vibration-proof rubber) 210 are housed.

The damping rubber 210 has a cylindrical inner metal fitting 212 and an outer metal fitting 214, and an annular rubber elastic body 216 sandwiched between them. 218 is fixed to this by a nut 220 in a fitted state. 222 is an opening 224 in the upper surface of the recess 206 in the axle box supporting device 204.
It is a rubber waterproof cover that closes the vehicle, and is attached via a metal mounting plate 228 that is fixed to the upper surface of the bogie frame 202 with bolts 226.

9 and 10 specifically show a waterproof cover 222, a mounting plate 228, and a mounting structure of the waterproof cover 222 by the mounting plate 228. As shown in FIG. As shown in these figures, the waterproof cover 222 has a substantially hat shape, and as shown in FIG. 9, it has an annular fitting portion 230 and a relatively wide collar portion 232 on the outer peripheral portion. In the state where the fitting portion 230 is fitted into the opening of the mounting plate 228, the collar portion 232 is attached to the mounting plate 2
It is fixed to 28.

Here, the collar portion 232 is provided with semicircular notches 234 at a total of four locations. These notches 2
Reference numeral 34 is for avoiding interference with the bolt 226.

As shown in FIG. 10, in the mounting plate 228, four holding claws 238 having an L-shaped cross section are welded to the upper surface of the plate body 236 and spaced at 90 ° intervals. By waterproof cover 2
The collar portion 232 of 22 is pressed downward and fixed. That is, the waterproof cover 222 forcibly pushes the collar portion 232 into the inside of the four holding claws 238 welded to the plate body 236, and thereby the opening 224 on the upper surface of the recess 206 via the mounting plate 228.
Is fixed in a closed state. This mounting plate 2
Reference numeral 28 constitutes a waterproof device together with the waterproof cover 222.

[0008]

However, the above-mentioned conventional waterproof structure has a problem that it is not sufficient in terms of waterproofness, and rainwater and the like enter the inside of the axle box support device 204, and particularly the inner part of the damping rubber 210. Metal fitting 212 and shaft 21
8 will rust and stick together, and when the axle box support device 204 is later disassembled into each member, the damping rubber 210
There is a risk that the shaft and the shaft 218 cannot be separated. If you try to disassemble it by force, the damping rubber 210
This causes a problem that the rubber elastic body 216 is destroyed.

Others In the conventional waterproof structure, the waterproof cover 2
The brim portion 232 of 22 must be pushed into the inside of the presser pawl 238 of the mounting plate 228 with a strong force to fix the waterproof cover 222, which requires a great deal of difficulty.
There was a problem that mounting workability was poor.

Furthermore, when the mounting plate 228 is manufactured, a plurality of holding claws 238 must be welded and joined to the plate body 236, which requires a lot of man-hours for manufacturing the mounting plate 228, resulting in a problem of high cost. Was there.

[0011]

The waterproof cover and the waterproof device of the axle box supporting device of the present invention have been devised in order to solve such problems. Thus, the invention according to claim 1 relates to a waterproof cover, which is attached via a mounting plate in a state of closing the upper surface opening of the recess of the axle box supporting device in the railway vehicle that accommodates the damping rubber therein. A watertight cover for a shaft box supporting device made of material, which is provided with an annular fitting portion that fits downward toward the recess, and engages an inner peripheral edge of the mounting plate on an outer peripheral surface of the fitting portion. An annular engagement groove is provided.

According to a second aspect of the present invention, in the first aspect, a part or the whole of the engagement groove of the waterproof cover elastically contacts the inner peripheral edge of the mounting plate over the entire circumference thereof. It is characterized in that a seal is provided between the mounting plate and the mounting plate.

A third aspect of the present invention relates to a waterproof device, wherein a waterproof cover made of an elastic material is attached to the axle box supporting device of a railway vehicle in a state in which a top opening of a recess in which damping rubber is housed is closed. A mounting plate for mounting the waterproof cover in a state of closing the opening,
The waterproof cover is provided with an annular fitting portion that is fitted downward toward the recess, and an outer peripheral surface of the fitting portion is provided with an annular engaging groove that engages with an inner peripheral edge of the mounting plate. In addition, the mounting plate is not provided with a pressing claw for pressing the waterproof cover downward and fixing the waterproof cover in a retaining state, and the waterproof cover is mounted on the mounting plate in the engaging groove. It is characterized in that it is fixed in a retaining state by engagement with the inner peripheral edge of the plate.

[0014]

As described above, in the waterproof cover according to the first aspect of the invention, the downward fitting portion is provided with the annular engaging groove for engaging with the inner peripheral edge of the mounting plate on the outer peripheral surface thereof. In the case of the cover, the fixing force of the waterproof cover to the mounting plate can be made strong by the engaging action and the engaging force of the engaging groove with respect to the inner peripheral edge of the mounting plate. Therefore, the fixing by the engagement of the engaging groove to the inner peripheral edge of the mounting plate,
When the flange of the waterproof cover is also fixed by the holding claw of the mounting plate shown in 0, the fixing of the waterproof cover becomes reliable, and some external force is generated during operation of the railway vehicle, and the waterproof cover comes off from the mounting plate. It is possible to reliably prevent such a situation.

Further, the fixing force based on the engagement of the engaging groove with the inner peripheral edge of the mounting plate can be made strong as described above. Therefore, depending on the case, the collar portion of the waterproof cover is fixed by pressing with the pressing claw shown in FIG. It becomes possible to omit such a thing (Claim 3). In such a case, it is not necessary to push the collar into the inside of the holding claw when installing the waterproof cover, and the workability of assembling the waterproof cover to the mounting plate is greatly improved, Also in the plate, the presser pawl can be made unnecessary, and therefore the welding work process of the presser pawl to the mounting plate can also be made unnecessary, the structure of the mounting plate itself can be simplified, and the manufacturing cost thereof can be reduced.

According to a second aspect of the present invention, a part or the whole of the engaging groove in the waterproof cover is elastically contacted with the inner peripheral edge of the mounting plate over the entire circumference, whereby the mounting plate is According to the second aspect of the present invention, the waterproof property can be improved more than before, and rainwater and the like can be more effectively intruded into the recess in the axle box supporting device. It becomes possible to prevent it.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 is an axle box containing a bearing for rotatably supporting an axle, and 12 is a bogie frame, 1
Reference numeral 4 is an axle box supporting device. The axle box support device 14 includes the recess 1
A coil spring 18 serving as a shaft spring and a damping rubber (vibration-proof rubber) 20 are housed in the inside of 6.

The damping rubber 20 has a cylindrical inner metal fitting 22 and an outer metal fitting 24, and an annular rubber elastic body 26 sandwiched between them. The portion 28 is fixed by a nut 30 in a fitted state. Reference numeral 32 denotes a rubber waterproof cover that closes an opening 34 on the upper surface of the recess 16 in the axle box support device 14, and is attached via a metal mounting plate 38 fixed to the upper surface of the bogie frame 12 by bolts 36. There is.

FIGS. 3 and 4 specifically show the waterproof cover 32, the mounting plate 38, and the mounting structure of the waterproof cover 32 by the mounting plate 38. As shown in FIG. 4, the mounting plate 38 has a circular opening at the center thereof, and further, at a position between the bolt holes 44 with respect to the plate body 42 having the bolt insertion holes 44 at every 90 °. In addition, the pressing claw 4 having an L-shaped cross section at four locations in the circumferential direction.
6 is welded and fixed to the upper surface of the bogie frame 12 by bolts 36 in the bolt holes 44.

On the other hand, the waterproof cover 32 is a hat-shaped member as a whole, and has a relatively wide brim portion 48 on its outer peripheral portion, and the brim portion 48 is superposed on the upper surface of the mounting plate 38. In this state, it is pressed downward by the pressing claw 46 and fixed to the mounting plate 38. Here, the flange portion 48 is formed with semicircular cutouts 50 at every 90 ° along the circumferential direction. These notches 50 are for avoiding interference with the bolt 36.

As shown in FIG. 5, the waterproof cover 32
A short cylindrical fitting portion 52 is integrally formed at a position below the brim portion 48, and the fitting portion 52 is fitted into the opening 34 of the recess 16. An annular engagement groove 54 is formed on the outer peripheral surface of the fitting portion 52, specifically, at a position immediately below the flange portion 48.
4 is adapted to engage with the inner peripheral edge of the mounting plate 38.

In this example, the outer diameter of the bottom portion 56 of the engaging groove 54 is the same as the inner diameter of the mounting plate 38. Tapered surfaces (45 ° in this example) 58, 60 are formed on both side surfaces of the engagement groove 54 at the upper and lower positions, respectively. The peripheral edge, in particular, the inner peripheral edge of the upper end and the inner peripheral edge of the lower end having a square cross section are elastically contacted with each other to form a seal.

In this example, the vertical width of the engaging groove 54 is slightly larger than the wall thickness of the mounting plate 38. This engaging groove 54 in the fitting portion 52
The lower part is an annular projection 62 that projects radially outward.
It is said that. In this example, the waterproof cover 32 constitutes a waterproof device together with the mounting plate 38.

In FIG. 2, the waterproof cover 32 is attached to the mounting plate 38.
The sectional structure in the state of being attached by is shown enlarged. In the case of this example, as shown in the figure, the waterproof cover 3
The collar portion 48 in FIG. 2 is sandwiched between the plate body 42 by the four holding claws 46 of the mounting plate 38, that is, the collar portion 48 is pressed downward by the holding claws 46 and fixed, and the fitting portion 52 of the recess 16 is formed. It is fitted in the opening 34, and the engaging groove 54 on the outer peripheral surface is attached to the mounting plate 38.
The waterproof cover 32 is fixed by engaging with the inner peripheral edge of the.

At this time, the engaging groove 54 is attached to the mounting plate 38.
By making elastic contact with the inner peripheral edge of the mounting plate 38 over the entire circumference thereof, in particular, by making watertight elastic contact with the upper end inner peripheral edge and the lower end inner peripheral edge of the mounting plate 38 on the tapered surfaces 58 and 60 over the entire circumference. A good seal is provided between the waterproof cover 32. Further, in this example, when the annular protruding portion 62 on the lower side of the engaging groove 54 is brought into elastic contact with the inner peripheral surface of the opening 34 in the recess 16, the sealing is also performed well in this portion.

As described above, in this embodiment, the fixing force of the waterproof cover 32 to the mounting plate 38 can be made strong by the engaging action and the engaging force of the engaging groove 54 with respect to the inner peripheral edge of the mounting plate 38. In addition, in this example, since the brim portion 48 of the waterproof cover 32 is also fixed by the pressing claw 46 of the mounting plate 38, the waterproof cover 32 is securely fixed, and some external force is generated during operation of the railway vehicle. As a result, the waterproof cover 32 can be reliably prevented from coming off the mounting plate 38.

Further, in this example, the engaging groove 54 is formed in the mounting plate 3.
Since it makes elastic contact with the inner peripheral edge of 8 over the entire circumference to perform a sealing action, it is highly waterproof, and rainwater and the like can effectively be prevented from entering the axle box support device 14. Therefore, when the shaft box supporting device is disassembled into the respective members, it is possible to prevent the shaft part 28 and the inner metal fitting 22 of the damping rubber 20 from being fixed due to rusting and becoming impossible to disassemble.

FIG. 6 shows another embodiment of the present invention. In this example, the mounting plate 38 is not provided with the holding claw 46 as shown in FIGS. 3 and 4, and the engaging groove 54 in the waterproof cover 32 is provided. This is an example in which the waterproof cover 32 is fixed to the mounting plate 38 only by a fixing force based on the engagement between the mounting plate 38 and the inner peripheral edge of the mounting plate 38.

In this case, it is not necessary to push the brim portion 48 into the inside of the holding claw 46 when mounting the waterproof cover 32, and the workability of mounting the waterproof cover 32 on the mounting plate 38 is significantly improved, and at the same time, the mounting plate is mounted. Also in 38, it is possible to eliminate the need for the presser pawl 46, and also to eliminate the step of welding the presser pawl 46 to the mounting plate 38, and simplify the structure of the mounting plate 38 itself.
The manufacturing cost can also be reduced.

Although the embodiment of the present invention has been described in detail above, this is merely an example. For example, in the present invention, as shown in FIG. 7, the collar portion 48 may be formed with a smaller outer diameter than that of the first embodiment, or, in some cases, the collar portion 48 may be omitted. It is also possible.

In addition, the outer diameter of the bottom portion 56 of the engaging groove 54 is made slightly larger than the inner diameter of the mounting plate 38, and the bottom portion 5 thereof is
6 can be elastically contacted with the inner peripheral surface of the mounting plate 38 so that sealing can be performed even at the same portion. Further, depending on the case, the outer diameter of the bottom portion 56 can be changed.
It is also possible to form it slightly smaller than the inner diameter of.

Further, the vertical groove width of the engaging groove 54 is set to be equal to or smaller than the wall thickness of the mounting plate 38 so that both side surfaces of the engaging groove 54 are attached.
The present invention can be configured in variously modified forms without departing from the gist of the present invention, such as elastic contact with the front surface and the back surface.

[Brief description of drawings]

FIG. 1 is a diagram showing a waterproof cover and a waterproof device according to an embodiment of the present invention together with an axle box supporting device.

FIG. 2 is an enlarged cross-sectional view of a main part of the waterproof cover, the mounting plate, and the periphery thereof shown in FIG.

FIG. 3 is a perspective view showing the waterproof cover and the mounting plate in FIG. 1 in a mounted state and a state before mounting the waterproof cover.

FIG. 4 is a perspective view showing both the waterproof cover and the mounting plate in FIG. 1 in a state before mounting.

5 is a view of the waterproof cover alone in FIG. 1. FIG.

FIG. 6 is a diagram showing another embodiment of the present invention.

FIG. 7 is a diagram showing still another embodiment of the present invention.

FIG. 8 is a view showing a conventional waterproof cover and waterproof device together with an axle box supporting device.

9 is an enlarged cross-sectional view showing a waterproof cover, a mounting plate and its peripheral portion in FIG.

10 is a perspective view showing the waterproof cover and the mounting plate in FIG. 8 in a mounted state and a state before the waterproof cover is mounted.

[Explanation of symbols]

14 Axle box support device 16 recess 20 damping rubber 32 waterproof cover 34 opening 38 Mounting plate 46 Presser claw 48 Tsuba 52 Fitting part 54 Engagement groove

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takenaka Kakunaka             5-109 Shimaya, Konohana-ku, Osaka City, Osaka Prefecture               Sumikin Design Engineering Co., Ltd. (72) Inventor Hiroshi Yamada             Tokai Rubber Works, Higashi 3-chome, Komaki City, Aichi Prefecture             Business (72) Inventor Hideaki Iwata             Tokai Rubber Works, Higashi 3-chome, Komaki City, Aichi Prefecture             Business

Claims (3)

[Claims] 1. A waterproof cover for an axle box supporting device made of an elastic material, which is attached via a mounting plate in a state in which an upper surface opening of a recess accommodating damping rubber of the axle box supporting device in a railway vehicle is closed. In addition, an annular fitting portion that fits downward toward the recess is provided, and an annular engaging groove that engages with an inner peripheral edge of the mounting plate is provided on an outer peripheral surface of the fitting portion. A waterproof cover for an axle box supporting device, which is characterized in that 2. The part or the whole of the engagement groove of the waterproof cover elastically contacts the inner peripheral edge of the mounting plate over the entire circumference thereof, and is in contact with the mounting plate. A waterproof cover for an axle box supporting device, characterized in that it is designed to seal 3. A waterproof cover made of an elastic material, which is attached to the axle box supporting device of a railway vehicle in a state of closing a top opening of a recess containing damping rubber therein, and the waterproof cover closing the opening. And a mounting plate for mounting the mounting plate in a state in which the waterproof cover is provided with an annular fitting portion that is fitted downward toward the recess, and the mounting plate is provided on the outer peripheral surface of the fitting portion. An annular engaging groove that engages with the inner peripheral edge is provided, and the mounting plate is not provided with a holding claw for pressing the waterproof cover downward and fixing it in a retaining state. A watertight device for an axle box supporting device, wherein the watertight device is fixed to the mounting plate in a retaining state by engaging the engagement groove with an inner peripheral edge of the mounting plate.