JP4693151B2 - High-speed railway vehicle with a bogie cover - Google Patents

Description

  The present invention relates to a bogie cover for a high-speed railway vehicle. When the portion of the bogie cover facing the bogie axle box is closed, the bogie cover may interfere with the bogie by turning the bogie during a sharp turn. The structure of the carriage cover is such that the air resistance and noise caused by the opening of the carriage cover during high-speed traveling can be reduced.

High-speed rail cars are covered with a bogie cover to reduce running resistance and noise, but in places where the radius of curvature of the rail is small, the turning angle of the bogie becomes large and protrudes toward the bogie side. In order for the part, for example, the axle box to interfere with the carriage cover, the portion facing the axle box of the carriage is an opening.
In addition, in order to prevent air resistance and noise due to the opening, there is a thing that covers the carriage completely without providing an opening in the carriage cover (No. 6-53356 microfilm). The present invention is intended for a vehicle that does not have the possibility of interference between the cover and the carriage and does not require any interference between the carriage cover and the carriage.
By the way, in the new direct high-speed railcar that enters the conventional line from the Shinkansen, the size of the car body is almost the same as the size of the conventional line, and the carriage part is the size of the Shinkansen. It cannot be completely covered with a bogie cover without providing an opening. However, since the driving conditions for high-speed driving are the same as for ordinary Shinkansen vehicles, the requirements for the bogie cover for reducing driving resistance and noise are the same.
Japanese Utility Model No. 6-53356 Microfilm

In conventional new direct high-speed railway vehicles (hereinafter simply referred to as “high-speed railway vehicles”), the carriage cover has an opening and the carriage is not completely covered. Not only is the resistance high, but there are also inconveniences such as a reduction in noise shielding performance due to noise generated from the opening and from the carriage. For this reason, although it is requested | required that a trolley | bogie part is completely covered with a trolley | bogie cover, an appropriate measure is not yet taken.
By the way, in a high-speed railway vehicle, when the carriage is completely covered with the carriage cover, the carriage cover actually interferes with the protruding portion of the axle box of the carriage. The radius of curvature of the main line for high-speed running is usually 2500 m or more. Because the turning angle of the carriage relative to the vehicle body is small, this is a special condition and there is no interference in other situations. On the other hand, when passing through a crossover at a low speed or traveling in a yard, there is a curve with a radius of curvature of up to 100m on the track. And the axle box of the cart may interfere with each other. Therefore, the impact between the carriage and the carriage cover is relatively small. By analyzing the actual situation of interference between the carriage and the carriage cover, it is possible to completely cover the carriage with the carriage cover if it is devised so that the carriage cover will not be damaged even if it interferes with the carriage. It was found that there was no particular hindrance.
The part that is closest to the side of the car body on the trolley side and is difficult to move to a position where interference can be avoided is the tip part of the axle box. is there.

On the other hand, during high-speed traveling, air pressure is also applied to the carriage cover as well as the side skirts due to micro-pressure waves generated when the trains pass each other or when the tunnel enters. Although the pressure applied to the carriage cover is relatively small because the lower end of the carriage cover is released, the force applied to that part is proportional to "pressure x area". The pressure receiving area (outer surface area) is desirably as small as possible.
In view of this, the present invention provides a carriage cover for a high-speed railway vehicle by providing a flexible portion with a minimum area that interferes with the carriage so that the carriage will not be damaged even if it interferes with the carriage due to the turning operation of the carriage. Thus, an object of the present invention is to devise the mechanism and structure of the bogie cover so that the required rigidity is ensured with respect to the micro atmospheric pressure at the time of passing the train or entering the tunnel.

[Solution]
Means taken to solve the above problems are as follows (a) to (c) for the high-speed railway vehicle provided with the bogie cover.
(A) A molded product made of a flexible elastic sheet material (hereinafter referred to as “flexible”) made of a natural rubber base or a synthetic rubber such as EPDM (ethylene propylene rubber) in a bogie cover opening provided in a portion facing the axle box of the bogie. A flexible elastic material molded product), and the flexible elastic material molded product is detachably fixed to the carriage cover.
(B) The flexible elastic material molded product has a bellows portion at a front portion, a rear portion and an upper portion thereof, and an outer side of the bellows portion is fixed to a peripheral edge of the carriage cover opening,
(C) When the bogie turns and the outer end of the axle box comes into contact with and pushes the synthetic rubber plate, the bellows portion is elastically deformed so that the central portion of the synthetic rubber plate is pushed out of the vehicle body. Being.

[Action]
Since a material having the necessary hardness and strength can be selected and appropriately adjusted with a natural rubber base or a synthetic rubber such as EPDM (ethylene propylene rubber), necessary rigidity and wear resistance can be ensured.
The opening provided in the part of the carriage cover that faces the carriage axle box is closed by a flexible elastic material molded product, so that the carriage axle box is molded into a flexible elastic material when the carriage turns significantly. Touch the product and push it outward. The flexible elastic material molded product is easily elastically deformed in the horizontal cross section direction (front part, rear part) and the vertical cross section direction (upper part), so that the central part is pushed outwards without difficulty. This will not be damaged.
In addition, although the said bellows part of the horizontal cross-sectional shape means the part which is a several waveform of an unevenness | corrugation, if the stretchability to the front-back direction is high, this unevenness | corrugation may be one. In addition, the vertical bellows portion means a single wave shape, but a plurality of wave shapes may be used when more flexibility is required.

[Embodiment 1]
In Embodiment 1, a sliding plate having a low sliding resistance is fixed to the outer end surface of the bogie axle box. When the bogie axle box interferes with a flexible elastic material molded product of the bogie cover, this sliding plate is acceptable. That is, it is in sliding contact with the inner surface of the flexible elastic material molded product.

[Action]
When the outer end surface of the bogie axle box is covered with a sliding plate with low sliding resistance, and the bogie turns and the axle box interferes with the flexible elastic material molded product, the sliding plate is flexible elastic Since the material box is pressed against the inner surface of the molded product, the axle box can slide smoothly against the molded product of the flexible elastic material, and wear and damage to the inner surface of the molded product of the flexible elastic material can be prevented.

[Embodiment 2]
Embodiment 2 is that the cart cover in the above solution is made of glass fiber reinforced plastic (hereinafter referred to as “GFRP”) that is easy to transmit electromagnetic waves and has high strength, and an LCX antenna antenna is attached to the inside of the cart cover. .
Even if it is a fiber-reinforced plastic with the same strength, carbon fiber is conductive, so the carbon-fiber-reinforced plastic using it (generally called CFRP) has high strength. Since the shielding property against electromagnetic waves is high, it is not convenient to place an antenna inside. On the other hand, since glass fiber has no electrical conductivity, GFRP using this does not have such a problem.
The LCX antenna is housed inside the side skirt of the Shinkansen train, and can reliably communicate various information with LCX (leakage coaxial cable: fixed antenna) laid along the rail. A communication antenna that can be used is known in the art.
In conventional Shinkansen vehicles, the LCX antenna 10 is arranged at necessary locations in the train vehicle, on the left and right sides of the vehicle, either continuously or divided into two locations of one vehicle (see FIG. 6: FIG. An example in which the vehicle is divided into two front and rear portions of the vehicle), and a large number of LCX antenna antenna elements 13 are arranged in a line in the front-rear direction and electrically connected sequentially.
The side skirt of the portion where the LCX antenna 10 is arranged has a structure in which an opening is formed in the metal side skirt, and a high-strength GFRP plate is attached to the portion without shielding electromagnetic waves as a cover. The LCX antenna antenna element 13 is detachably fixed to the inside thereof. The structure of the above-mentioned LCX antenna antenna element 13 and the mounting structure to the side skirt are various, and since it is a well-known matter in the past, detailed description thereof will be omitted, but the outline of the structure of an example is as shown in FIG. Is.

[Action]
The material of the trolley cover in the solution means can be selected as appropriate, and the fact that it is made of GFRP is not inseparably related to the problem solving, but it is made of GFRP that is easy to transmit electromagnetic waves and has high strength. The LCX antenna antenna can be housed inside.
Conventionally, the LCX antenna was installed inside the metal side skirt, but the metal as it is does not transmit electromagnetic waves, so there is a problem for the purpose of use of the antenna. A plate made of GFRP was attached for the purpose of creating an opening and allowing electromagnetic waves to pass through, and an LCX antenna antenna was housed inside the plate. For this reason, the structure of the side skirt was complicated.
As in Embodiment 2, the main part of the carriage cover is made of GFRP, and the LCX antenna antenna is housed inside thereof, so that the side skirts of the general part can all have the same structure.
Also, since the length of the antenna for one car is insufficient at only one carriage, it is possible to provide a conventional synthetic antenna by providing an LCX antenna antenna in the carriage cover before and after one vehicle. is there.

The effect of the present invention is clear from the action of the above solution 1, and uses the carriage cover having the mechanism and structure as described above, and thus completely covers the carriage, so that the opening provided in the carriage cover Air resistance and noise due to the parts are reduced, and the flexible elastic material molded product is easily elastically deformed by interference with the bogie axle box, so there is no impact due to the interference, and the flexible elastic material molded product is durable. Moreover, the vibration of the carriage cover is effectively prevented when the high-speed railway vehicle is traveling at high speed.
In addition, the flexible elastic material molded part of the carriage cover is deformed by being pushed by the carriage axle box, but since this deformation is due to the expansion and contraction of the bellows part, it is not damaged by the deformation, and therefore High durability.

Next, embodiments will be described with reference to the drawings.
[Example 1]
There is a side skirt 1 having a cross-sectional shape in which the upper half is vertical and the lower half is inclined inward, and a portion covering the carriage is a carriage cover 2 having the same shape. Front and rear openings 2a, 2a are provided at positions corresponding to the cart axle box of the cart cover 2 (FIG. 1). The carriage cover 2 is made of GFRP (glass fiber reinforcement plastic), and flexible elastic material molded products 3 and 3 are mounted in the openings 2a and 2a (FIGS. 2 and 3). The flexible elastic material molded products 3 and 3 have a bellows-like periphery, and the lower side is free. Sides other than the lower side, that is, the front side, the rear side, and the upper side are detachably fixed to the edges of the openings 2a and 2a by a fixing screw A (FIG. 4). As shown in FIG. 4, there are fixing bolt holes 3c in the front and rear fixed parts 3x and the upper fixed part 3y, and the bellows part is formed by two corrugations in the vicinity of the fixed part 3x. There are 3a and 3a, and there is a bellows part 3b with one corrugated unevenness in the vicinity of the fixed part 3y in the upward direction.

In this embodiment, the flexible elastic material molded product 3 has a thickness of 15 mm, the wave width of the bellows portion 3a is 100 mm, the height is 50 mm, and the wave width of the bellows portion 3b is 50 mm. The height is 50 mm. The dimensions of the bellows portions 3a and 3b are expanded and contracted smoothly when the synthetic rubber plate 3 is pushed into the axle box 8 supporting the shaft of the wheel 6 while maintaining the required rigidity. It is designed as appropriate according to the hardness and strength of the material and the size of the synthetic rubber plate so as to have a certain degree of rigidity and flexibility.
The flexible elastic material molded products 3 and 3 themselves need to have a strength that does not vibrate due to wind pressure during high-speed traveling and does not easily break.

  When the carriage 4 turns sharply while traveling on a sharp curve, the carriage axle box 8 comes into contact with the inner side surface of the flexible elastic material molded product 3 and pushes it outward. A flexible elastic material molded product (specifically, a synthetic rubber plate) 3 is elastically deformed and bulges outward by this cart axle box 8, and when the cart axle box 8 returns to the inside, a flexible elastic material molded product is obtained. 3 is elastically restored. And the elastic deformation resistance of the flexible elastic material molding 3 with respect to the pushing force of the cart axle box 8 is relatively large. If the frictional resistance between the bogie axle box 8 and the flexible elastic material molded product 3 is large, an excessive force is applied to the flexible elastic material molded product 3 to improve the durability of the flexible elastic material molded product 3. Seriously harmed. In this embodiment, a sliding plate 9 is put on the outer end surface of the bogie axle box 8 and is detachably fixed by appropriate fixing means such as a set screw (see FIG. 5). The sliding plate 9 is made of a steel plate having a shape as shown in FIG. 5B, and the sliding surface s is coated with a low friction resin such as a fluororesin film, thereby reducing the above-mentioned frictional resistance. Yes.

By the way, as shown in the figure, the axle center of the wheel 6 is below the fold line (the fold line between the vertical upper half and the lower half inclined inward) L of the carriage cover 2 (see FIGS. 1 and 3). Therefore, when the cart 4 turns significantly, the lower end of the outer end surface of the cart axle box 8 collides with the inclined portion of the cart cover 2. From the above, in this embodiment, the inclined portion of the carriage cover 2 is cut out to form an opening, and the flexible elastic material molded product 3 is attached to the opening. By doing so, the size of the opening 2a is made as small as possible.
Incidentally, since the length of the opening 2a in the front-rear direction is about 600 mm, the height in the up-down direction is about 200 mm, and the surface area is small, the load on the flexible elastic material molded product 3 due to air pressure (wind pressure, etc.) is extremely high. small.

[Example 2]
Next, another embodiment 2 in which an LCX antenna antenna is attached to the cart cover 2 of the above embodiment will be described.
The LCX antenna is a communication antenna that is housed inside the side skirt of a Shinkansen train and that can reliably communicate various information with a fixed antenna laid along the rail. Are well known in the art.
The LCX antenna antennas 10 are arranged on the left and right sides of the leading vehicle of the train (see FIG. 8), and a large number of LCX antenna antenna elements 13 are arranged in a line in the front-rear direction and electrically connected sequentially. The side skirt cover 14 (see FIGS. 6C and 7) where the LCX antenna antenna 10 is disposed is made of GFRP, and the LCX antenna antenna element 13 is detachably fixed to the inside thereof. The LCX antenna antenna element 13 has a variety of structures (see FIG. 7) and attachments to the side skirt cover 14, which are well known in the art, and will not be described in detail.

In the second embodiment, the carriage cover 2 is made of GFRP, and a large number of LCX antenna antenna elements 13 are detachably attached to the inside of the vertical portion (see FIG. 9). In this example, two sets of LCX antenna antenna elements 13 are attached to one carriage cover 2 because of the length of the carriage cover 2 in the front-rear direction, but if the LCX antenna antenna elements 13 are insufficient, the leading vehicle The LCX antenna antenna elements 13 may be housed in the front and rear cart covers, and these may be connected by the coaxial cable 12 via the combiner 11.
In the second embodiment, since the LCX mid-line antenna element 13 is not attached to the side skirt 1, the same side skirt as that of other vehicles (for example, aluminum alloy) can be used for the side skirt of the leading vehicle. . Since the side skirts can be made of, for example, an aluminum alloy for all vehicles, the cost can be reduced.

FIG. 2 is a perspective view schematically showing a high-speed railway vehicle. (A) is a top view which shows typically the relationship between the trolley | bogie and the trolley | bogie cover in Example 1, (b) is a side view of (a). (A) is a front view of the attachment part of the flexible elastic material molded product of Example 1 of FIG. 2, (b) is BB sectional drawing in figure (a). (A) is a front view of a flexible elastic material molded article, (b) is a BB cross-sectional view of (a), and (c) is a CC cross-sectional view of (a). (A) is sectional drawing which shows notionally the positional relationship of a bogie cover, a bogie axle box, and a sliding board, (b) is a perspective view of a sliding board. (A) is a top view which shows notionally arrangement | positioning of the LCX antenna antenna of a prior art example, (b) is a (a) side view, (c) is a front view of the attachment part of an antenna antenna. (A) is sectional drawing of the sleeper direction (vehicle lateral direction) of an example of the conventional LCX antenna antenna element, (b) is sectional drawing of the planar direction of an example of the conventional LCX antenna antenna element. (A) is a conceptual top view of Example 2 which has arrange | positioned the LCX antenna antenna in the trolley | bogie cover, (b) is a side view. These are the side views of Example 2 which has arrange | positioned the LCX antenna in the trolley | bogie cover.

Explanation of symbols

1: Side skirt of high-speed railway vehicle 2: Bogie cover 2a: Opening portion of bogie cover (attachment portion of “molded product made of flexible elastic sheet material”)
3: Flexible elastic material molded product 4: Bogie 5: Air spring 6: Wheel 7: Axle 8: Bogie axle box 9: Sliding plate 10: LCX antenna antenna 11: Synthesizer 12: Coaxial cable 13: LCX antenna antenna element 14: GFRP side skirt cover (LCX antenna antenna part)
A: Fixing screw L: Fold line in side skirt

Claims (3)

In high-speed rail cars with a bogie cover,
A flexible elastic material molded product is fitted into a carriage cover opening provided in a portion facing the protruding portion of the axle box of the cart, and the flexible elastic material molded product is detachably fixed to the cart cover.
The flexible elastic material molded product has a bellows portion at its front portion, rear portion, and upper portion, and the outside of the bellows portion is fixed to the periphery of the carriage cover opening,
When the carriage turns and the protruding portion of the axle box abuts against and presses the flexible elastic material molded product, the bellows part is elastically deformed so that the central portion of the flexible elastic material molded product is outside the vehicle body. A high-speed railway vehicle characterized in that it is pushed out to the road.   A sliding plate with a low sliding resistance is fixed to the outer end surface of the protruding portion of the bogie axle box. When the protruding portion of the bogie axle box interferes with the flexible elastic material molded product of the bogie cover, this sliding 2. The high-speed railway vehicle according to claim 1, wherein the plate is in sliding contact with the inner surface of the flexible elastic material molded product.   The vehicle cover is made of glass fiber reinforcement plastic (GFRP) that is easy to transmit electromagnetic waves and has high strength, and it is a vehicle that is planned to travel along a railway line that has LCX (leakage coaxial cable) in parallel with the track. In this case, the high-speed railway vehicle according to claim 1, wherein an LCX antenna antenna is attached to the inside of the carriage cover.

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