JP4052833B2 - Waterproof cover and waterproof device for axle box support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof cover and a waterproof device for a shaft box support device in a railway vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an axle box support device for a railway vehicle, a rubber waterproof cover is attached, and the waterproof cover prevents rainwater and the like from entering the recess of the axle box support device.
FIG. 8 shows an example of a conventional waterproof cover and waterproof device of the axle box support device.
[0003]
In FIG. 8, reference numeral 200 denotes an axle box in which a bearing that rotatably supports the axle is housed, 202 denotes a carriage frame, and 204 denotes an axle box support device.
The axle box support device 204 contains a coil spring 208 as a shaft spring and a damping rubber (anti-vibration rubber) 210 in a recess 206.
[0004]
Here, 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, and the shaft portion 218 is attached to the inner metal fitting 212. It is fixed by a nut 220 in a state where it is fitted in.
A rubber waterproof cover 222 closes the opening 224 on the upper surface of the recess 206 in the axle box support device 204, and is attached via a metal mounting plate 228 fixed to the upper surface of the carriage frame 202 by bolts 226. Yes.
[0005]
9 and 10 specifically show the waterproof cover 222, the mounting plate 228, and the waterproof cover 222 mounting structure using the mounting plate 228.
As shown in these drawings, the waterproof cover 222 has a substantially hat shape, and has an annular fitting portion 230 and a relatively wide flange portion 232 at the outer peripheral portion as shown in FIG. The flange portion 232 is fixed to the mounting plate 228 in a state where the insertion portion 230 is inserted into the opening of the mounting plate 228.
[0006]
Here, the collar portion 232 is provided with semicircular cutouts 234 at a total of four locations. These notches 234 are for avoiding interference with the bolts 226.
[0007]
As shown in FIG. 10, the mounting plate 228 has L-shaped presser claws 238 welded and joined to the upper surface of the plate body 236 at 90 ° intervals, and the presser claws 238 provide waterproofing. The collar part 232 of the cover 222 is pressed down and fixed.
That is, the waterproof cover 222 forcibly pushes the flange portion 232 inside the four presser claws 238 welded and joined to the plate body 236, thereby opening the opening 224 on the upper surface of the recess 206 via the mounting plate 228. Mounted and fixed in a closed state.
The mounting plate 228 forms a waterproof device together with the waterproof cover 222.
[0008]
[Problems to be solved by the invention]
However, in the case of the above conventional waterproof structure, there is a problem that it is not sufficient in terms of waterproofness, and rainwater or the like enters the shaft box support device 204, and the inner metal fitting 212 and the shaft portion 218 in the damping rubber 210 are particularly rusted. When the axle box support device 204 is later disassembled into each member, the damping rubber 210 and the shaft 218 may not be separated.
Thus, if the decomposition is forced, the rubber elastic body 216 of the damping rubber 210 is broken.
[0009]
In the other conventional waterproof structure, the waterproof cover 222 must be fixed by pressing the flange portion 232 of the waterproof cover 222 into the inside of the presser claw 238 of the mounting plate 228 with a strong force. There was a problem that mounting workability was bad.
[0010]
Furthermore, when the mounting plate 228 is manufactured, a plurality of presser claws 238 must be welded to the plate main body 236, which causes a problem that manufacturing the mounting plate 228 takes a lot of man-hours and increases costs.
[0011]
[Means for Solving the Problems]
The waterproof cover and the waterproof device for the axle box support device of the present invention have been devised to solve such problems.
Thus, the first aspect of the present invention relates to a waterproof cover, which is attached to the axle box support device in a railway vehicle via a mounting plate so as to close the upper surface opening of the recess in which the damping rubber is accommodated. A waterproof cover for a shaft box supporting device made of a material, provided with an annular fitting portion that is fitted downward toward the recess, and engaged with an inner peripheral edge of the mounting plate on an outer peripheral surface of the fitting portion provided engaging an annular groove, the engagement groove is with the width dimension of the vertical direction is larger relative to the thickness dimension of the mounting plate, profile angle-shaped upper end of the mounting plate in engagement grooves have tapered surface is formed in contact with the inner peripheral edge and the lower end inner periphery elastically, resiliently contact with the mounting engagement grooves over the entire circumference against the inner peripheral edge of the mounting plate in said tapered surface Seal between the plates And said that you have without the jar.
[0012]
Claim 2 relates to a waterproof device, and is provided with a waterproof cover made of an elastic material, which is attached in a state of closing an upper surface opening of a recess in which a damping rubber is housed in an axle box support device in a railway vehicle, and the waterproof cover A mounting plate for closing the opening, and 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. the engaging an annular groove which engages the inner peripheral edge of the mounting plate is provided, the engagement groove is with the width dimension of the vertical direction is larger relative to the thickness dimension of the mounting plate, the engagement groove the be formed tapered surfaces which resiliently contacts the upper end inner periphery and a lower end inner peripheral edge profile angle like of the mounting plate, all the engagement groove with the inner peripheral edge of the mounting plate in said tapered surface Elastic contact over the circumference Yes forms to seal between the mounting plate and the mounting plate does not have retaining pawl is provided for securing the retaining state pressed down the waterproof cover, the waterproof cover with said mounting The engagement groove is fixed to the plate so as to be secured by engagement with the inner peripheral edge of the mounting plate.
[0013]
[Operation and effect of the invention]
As described above, the waterproof cover according to claim 1 is provided with the annular engagement groove that engages with the inner peripheral edge of the mounting plate on the outer peripheral surface of the downward fitting portion. The fixing force of the waterproof cover to the mounting plate can be strengthened by the engaging action and engaging force of the engaging groove with respect to the inner peripheral edge.
Therefore, when the fixing by engagement of the engaging groove with the inner peripheral edge of the mounting plate and the fixing of the collar portion of the waterproof cover by the presser claw of the mounting plate shown in FIG. It can be reliably prevented that some external force is generated during operation of the railway vehicle and the waterproof cover is detached from the mounting plate.
[0014]
In addition, since the fixing force based on the engagement of the engagement groove with the inner peripheral edge of the mounting plate can be made strong as described above, in some cases, for example, pressing and fixing the collar portion of the waterproof cover with the presser claw shown in FIG. It can be omitted (Claim 2 ).
In such a case, it is no longer necessary to push the collar part into the inside of the presser claw when installing the waterproof cover, and the workability of attaching the waterproof cover to the mounting plate is greatly improved. Even in the plate, the presser claw can be eliminated, and therefore, the welding operation process of the presser claw to the mounting plate can be eliminated, the structure of the mounting plate itself can be simplified, and the manufacturing cost can be reduced.
[0015]
Further, according to the present invention , a taper surface is formed in the engagement groove in the waterproof cover, and the engagement groove is brought into elastic contact with the inner peripheral edge of the attachment plate over the entire circumference. According to the present invention , the waterproof property can be improved as compared with the conventional case, and rainwater and the like can be effectively prevented from entering the recess in the axle box support device. Is possible.
[0016]
【Example】
Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes an axle box in which a bearing that rotatably supports an axle is housed, 12 is a carriage frame, and 14 is an axle box support device.
The axle box support device 14 accommodates a coil spring 18 as a shaft spring and a damping rubber (anti-vibration rubber) 20 in the recess 16.
[0017]
Here, 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 nut 30 is fixed in the fitted state.
A rubber waterproof cover 32 closes the 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 carriage frame 12 by bolts 36. Yes.
[0018]
3 and 4 specifically show the waterproof cover 32, the mounting plate 38, and the mounting structure of the waterproof cover 32 using the mounting plate 38. FIG.
As shown in FIG. 4, the mounting plate 38 has a circular opening at the center, and is further provided at a position between the bolt holes 44 with respect to the plate body 42 having the bolt insertion holes 44 every 90 °. The presser claws 46 having L-shaped cross sections are welded and joined at four locations in the circumferential direction. The bolt holes 44 are fixed to the upper surface of the carriage frame 12 by bolts 36.
[0019]
On the other hand, the waterproof cover 32 is a hat-shaped member as a whole, and has a relatively wide flange 48 on the outer periphery, and the flange 48 is superimposed on the upper surface of the mounting plate 38. It is pressed downward by the presser claw 46 and is fixed to the mounting plate 38.
Here, a semicircular cutout 50 is formed in the flange portion 48 every 90 ° along the circumferential direction.
These notches 50 are for avoiding interference with the bolts 36.
[0020]
As shown in FIG. 5, the waterproof cover 32 is integrally formed with a short cylindrical fitting portion 52 at a position below the flange portion 48, and the fitting portion 52 is an opening of the recess 16. 34 is inserted into the inside.
An annular engagement groove 54 is formed on the outer peripheral surface of the fitting portion 52, specifically, a position directly below the flange portion 48, so that the engagement groove 54 engages with the inner peripheral edge of the mounting plate 38. It has become.
[0021]
Here, the bottom portion 56 of the engagement groove 54 has the same outer diameter as the inner diameter of the mounting plate 38 in this example.
Tapered surfaces (45 ° in this example) 58, 60 are formed on both side surfaces of the upper and lower positions of the engagement groove 54, and the engagement groove 54 is formed on the inner side of the mounting plate 38 at both the taper surfaces 58, 60. Elastic contact is made with the peripheral edge, particularly the upper and lower inner peripheral edges having an angular cross section, and a seal is formed at those portions.
[0022]
In this example, the vertical dimension of the engagement groove 54 is slightly larger than the thickness dimension of the mounting plate 38.
The lower portion of the engaging groove 54 in the fitting portion 52 is an annular projecting portion 62 projecting radially outward.
In this example, the waterproof cover 32 and the mounting plate 38 constitute a waterproof device.
[0023]
FIG. 2 shows an enlarged sectional structure of the waterproof cover 32 attached by the attachment plate 38.
As shown in the figure, in this example, the collar portion 48 of the waterproof cover 32 is sandwiched with the plate body 42 by the four presser claws 46 of the mounting plate 38, that is, the collar portion 48 is lowered downward by the presser claw 46. The waterproof cover 32 is fixed by pressing and fixing, inserting the fitting portion 52 into the opening 34 of the recess 16, and engaging the engaging groove 54 on the outer peripheral surface with the inner peripheral edge of the mounting plate 38. The
[0024]
At this time, the engagement groove 54 is elastically contacted with the inner periphery of the mounting plate 38 over the entire circumference, so that the taper surfaces 58 and 60 are watertight over the entire circumference of the upper end inner periphery and the lower end inner periphery of the mounting plate 38. Due to the elastic contact, the space between the mounting plate 38 and the waterproof cover 32 is well sealed.
Further, in this example, when the annular projecting 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 same portion is sealed well.
[0025]
Thus, in this example, the fixing force of the waterproof cover 32 to the mounting plate 38 can be strengthened 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, the fixing of the flange portion 48 of the waterproof cover 32 by the presser claw 46 of the mounting plate 38 is used in combination, so that the waterproof cover 32 is securely fixed and some external force is generated during operation of the railway vehicle. Thus, it is possible to reliably prevent the waterproof cover 32 from being detached from the mounting plate 38.
[0026]
Further, in this example, the engaging groove 54 is elastically contacted with the inner peripheral edge of the mounting plate 38 over the entire circumference to provide a sealing action. Therefore, the waterproofing is high, and rainwater or the like enters the axle box support device 14 effectively. Can be prevented.
Therefore, when the axle box supporting device is disassembled into each member, it is possible to prevent the shaft portion 28 and the inner metal fitting 22 of the damping rubber 20 from being fixed due to rusting and becoming impossible to disassemble.
[0027]
FIG. 6 shows another embodiment of the present invention. In this example, the attachment plate 38 is not provided with the presser pawl 46 as shown in FIGS. 3 and 4, and the engagement groove 54 and the attachment plate in the waterproof cover 32 are 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 with the inner peripheral edge of 38.
[0028]
In this case, when attaching the waterproof cover 32, it is not necessary to push the collar portion 48 into the inside of the presser claw 46, and the workability of attaching the waterproof cover 32 to the attachment plate 38 is greatly improved. The presser claw 46 can be eliminated, and therefore, the welding operation process of the presser claw 46 to the mounting plate 38 can be eliminated, the structure of the mounting plate 38 itself can be simplified, and the manufacturing cost can be reduced.
[0029]
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, it is possible to form the collar portion 48 with a smaller outer diameter than in the first embodiment, or the collar portion 48 may be omitted in some cases. It is also possible.
[0030]
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 so that the bottom portion 56 is brought into elastic contact with the inner peripheral surface of the mounting plate 38 and sealing is also performed at that portion. also to be, also der Luna etc. that such further case slightly smaller than the inner diameter of the mounting plate 38 the outer diameter of the bottom portion 56 by the present invention is variously modified within a range not departing from the gist that It can be configured in a form to which is added.
[Brief description of the drawings]
FIG. 1 is a view showing a waterproof cover and a waterproof device according to an embodiment of the present invention together with a shaft box support device.
2 is an enlarged cross-sectional view of a main part showing an enlarged view of a waterproof cover, a mounting plate and its periphery in FIG.
FIG. 3 is a perspective view showing the waterproof cover and the mounting plate in FIG. 1 in a waterproof cover attached state and a state before attachment.
4 is a perspective view showing both the waterproof cover and the mounting plate in FIG. 1 in a state before mounting. FIG.
5 is a diagram of a 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 a shaft box supporting device.
9 is an enlarged cross-sectional view of the waterproof cover, the mounting plate, and the periphery thereof in FIG.
10 is a perspective view showing the waterproof cover and the mounting plate in FIG. 8 in a waterproof cover attached state and a state before attachment.
[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 flange 52 fitting part 54 engagement groove

Claims (2)

A waterproof cover for an axle box support device made of an elastic material, which is attached via a mounting plate in a state of closing an upper surface opening of a recess in which a damping rubber is housed in an axle box support device in a railway vehicle,
An annular fitting portion that is fitted downward toward the recess is provided, and an annular engagement groove that is engaged with the inner peripheral edge of the mounting plate is provided on the outer peripheral surface of the fitting portion. with the width of the vertical direction is larger relative to the thickness dimension of the mounting plate, the engagement groove tapered surface for elastically contacting the upper end inner periphery and lower end inner periphery profile angle like of the mounting plate There have been formed, that the engagement grooves are no to seal between the elastic contact to the mounting plate over the entire circumference against the inner peripheral edge of the mounting plate in said tapered surface A waterproof cover for the axle box support device. A waterproof cover made of an elastic material, which is attached in a state in which an upper surface opening of a recess in which a damping rubber is accommodated is closed, and a waterproof cover in a state in which the opening is closed. The waterproof cover is provided with an annular fitting portion that is fitted downward toward the recess, and is engaged with the inner peripheral edge of the mounting plate on the outer peripheral surface of the fitting portion. annular engaging groove is provided, the engagement groove is with the width dimension of the vertical direction is larger relative to the thickness dimension of the mounting plate, the engagement groove profile angle like of the mounting plate have tapered surface is formed to elastically contact the upper end inner periphery and lower end inner periphery, resiliently contact with the engaging groove over the entire circumference against the inner peripheral edge of the mounting plate in said tapered surface Seal between the mounting plate And the mounting plate is not provided with a presser claw for pressing down the waterproof cover downward and fixing the waterproof cover in a locked state, and the waterproof cover is not attached to the mounting plate with respect to the engagement groove. A waterproofing device for a shaft box supporting device, wherein the waterproofing device is fixed in a retaining state by engagement with an inner peripheral edge of a mounting plate.

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