Railroad vehicle

Abstract

To provide a railroad vehicle designed to reduce a burden on piping installation work.SOLUTION: A railroad vehicle (1) comprises a truck (20) and a vehicle body (10) which is supported by the truck (20). The truck (20) has a truck frame (21), first piping (25) and second piping (26). The first piping (25) is: connected to a first connection section (251) installed on a position closer to a front side than a center of the truck frame (21) in a longitudinal direction; and extended from the first connection section (251) toward the front side. The second piping (26) is: connected to a second connection section (261) installed on a position closer to a rear side than the center of the truck frame (21) in the longitudinal direction; and extended from the second connection section (261) toward the rear side. An interior of the truck frame (21) is continuous from the first connection section (251) to the second connection section (261).SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to rail vehicles. [Background technology]

[0002] A railway vehicle (hereinafter, simply referred to as a "vehicle") comprises a bogie, which includes a bogie frame as a skeleton, and a car body. The bogies are usually arranged at the front and rear of the car body. The car body is supported by a pair of left and right air springs arranged on each bogie. Generally, a number of cars are coupled together to run on rails. The coupling between the cars is maintained by couplers. The couplers are connected to the front and rear beams of the car body, respectively.

[0003] In railway vehicles, the power source for air springs is compressed air. The compressed air is generated by a compressor. The generated compressed air is stored in an air reservoir. The compressed air in the air reservoir is supplied to the air springs. The compressor and the air reservoir are located, for example, in the center of the front-to-rear direction of the lower part of the car body. The compressed air in the air reservoir is used to power various devices equipped on the car. For example, the compressed air is used to open and close doors, raise and lower pantographs, and power couplers. In addition, the compressed air is used to power brakes, etc.

[0004] Piping for transporting compressed air is essential to supply compressed air to equipment that uses it. For example, the piping connecting the air reservoir and the coupler is passed through the gap formed between the bogie and the car body. However, the gap between the bogie and the car body is extremely narrow near the center in the fore-and-aft direction of the bogie. This is because many parts, such as the air spring, center pin, and traction device, are densely packed in the gap. Passing the piping through the narrow gap between the bogie and the car body is a very burdensome task that requires careful work by the worker.

[0005] Conventionally, there is known a technique for facilitating the installation of such piping (for example, Patent Document 1). Patent Document 1 discloses a bogie for a railway vehicle in which various piping is installed inside the bogie frame. In Patent Document 1, the bogie frame includes two side beams and a cross beam. The side beams are hollow, and various piping is installed inside the side beams. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Utility Model Application Publication No. 59-102564 Summary of the Invention [Problem to be solved by the invention]

[0007] As described above, it is a heavy burden for workers to pass piping through the narrow gap between the bogie and the car body near the center of the bogie in the front-rear direction. Even if the technology described in Patent Document 1 is used, large-scale work is required to install the piping inside the hollow side beam.

[0008] An object of the present disclosure is to provide a railway vehicle that can reduce the burden of piping installation work. [Means for solving the problem]

[0009] A railway vehicle according to the present disclosure includes a bogie and a carbody supported on the bogie. The bogie includes a bogie frame, a first pipe, and a second pipe. The first pipe is connected to a first connection portion provided forward of the center of the bogie frame in the fore-aft direction, and extends forward from the first connection portion. The second pipe is connected to a second connection portion provided rearward of the center of the bogie frame in the fore-aft direction, and extends rearward from the second connection portion. The interior of the bogie frame is continuous from the first connection portion to the second connection portion. Effect of the Invention

[0010] According to the railway vehicle according to the present disclosure, the burden of piping installation work can be reduced. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic diagram showing the overall configuration of a railway vehicle according to a first embodiment. [Diagram 2] FIG. 2 is a top view of the bogie of the railway vehicle according to the first embodiment. [Diagram 3] FIG. 3 is a top view of the bogie of the railway vehicle according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] A railway vehicle according to an embodiment includes a bogie and a carbody supported on the bogie. The bogie includes a bogie frame, a first pipe, and a second pipe. The first pipe is connected to a first connection portion provided forward of the center in the fore-aft direction of the bogie frame, and extends forward from the first connection portion. The second pipe is connected to a second connection portion provided rearward of the center in the fore-aft direction of the bogie frame, and extends rearward from the second connection portion. The interior of the bogie frame is continuous from the first connection portion to the second connection portion (first configuration).

[0013] A first pipe and a second pipe are connected to the bogie frame of the railcar according to the first configuration. The inside of the bogie frame is continuous from the first connection part to which the first pipe is connected to the second connection part to which the second pipe is connected. Therefore, the part of the bogie frame between the first connection part and the second connection part can be used as a pipe for transporting compressed air. For example, when connecting the air reservoir and the coupler in the railcar according to the first configuration, the first pipe can be connected to the air reservoir, and the second pipe can be connected to the coupler. Then, the compressed air in the air reservoir is transported to the coupler through the bogie frame. In this case, no work is required to install a pipe in the gap between the bogie and the car body near the center of the bogie in the front-rear direction. Therefore, according to the railcar according to the first configuration, the burden of the work of installing the pipe can be reduced. In addition, by increasing the volume of the part of the bogie frame that contributes to the transport of compressed air, that part can be used as an air tank.

[0014] The railway vehicle according to the first configuration preferably has the following configuration. The bogie frame includes two side beams, two cross beams, and an intermediate pipe. Each of the two side beams extends in the front-rear direction. Each of the two cross beams extends in the left-right direction and is joined to both of the two side beams. The intermediate pipe is joined to both of the two cross beams and is continuous with the interiors of each of the two cross beams. The first connection portion is provided on the front cross beam of the two cross beams. The second connection portion is provided on the rear cross beam of the two cross beams (second configuration). In the railway vehicle of the second configuration, the front cross beam provided with the first connection portion, the intermediate pipe, and the rear cross beam provided with the second connection portion can be used as piping for transporting compressed air.

[0015] In the railway vehicle according to the first configuration, the bogie frame preferably includes two side beams and a cross beam. Each of the two side beams extends in the fore-aft direction. The cross beam extends in the left-right direction and is joined to both of the two side beams. The first connection portion is provided at the front end portion of one of the two side beams. The second connection portion is provided at the rear end portion of the one side beam. The interior of the one side beam is continuous between the first connection portion and the second connection portion (third configuration). In the railway vehicle of the third configuration, the portion of the one side beam between the first connection portion and the second connection portion can be used as a pipe for transporting compressed air.

[0016] The railcar according to the third configuration preferably has the following configuration. The bogie further includes a third pipe and a fourth pipe. The third pipe is connected to a third connection part provided at the front end part of the other of the two side beams, and extends forward from the third connection part. The fourth pipe is connected to a fourth connection part provided at the rear end part of the other side beam, and extends rearward from the fourth connection part. The interior of the other side beam is continuous between the third connection part and the fourth connection part (fourth configuration). In the railcar of the fourth configuration, apart from the one side beam on which the first connection part and the second connection part are provided, the part of the other side beam between the third connection part and the fourth connection part can be used as a pipe for transporting compressed air. In short, according to the railcar of the fourth configuration, both of the two side beams can be used as a transport path for compressed air.

[0017] Hereinafter, a railway vehicle according to an embodiment of the present disclosure will be described with reference to the drawings. In the drawings, the same or corresponding parts are given the same reference numerals, and duplicated explanations will be omitted as appropriate.

[0018] [First embodiment] Fig. 1 is a schematic diagram showing the overall configuration of a railway vehicle 1 according to this embodiment. Fig. 1 shows the railway vehicle 1 as viewed along the traveling direction. In this specification, the traveling direction of the railway vehicle 1 may be referred to as the front-rear direction, the width direction of the railway vehicle 1 may be referred to as the left-right direction, and the height direction of the railway vehicle 1 may be referred to as the up-down direction.

[0019] 1, a railway vehicle 1 includes a car body 10 and a bogie 20. The car body 10 is supported on the bogie 20. The bogies 20 are disposed on the front and rear sides of the car body 10. In this embodiment, the bogie 20 is a bolsterless bogie.

[0020] The bogie 20 includes a bogie frame 21, air springs 22 arranged on the left and right sides of the bogie frame 21, and wheel sets 23. The bogie frame 21 forms the framework of the bogie 20. The air springs 22 are arranged between the car body 10 and the bogie frame 21 to support the car body 10. The wheel sets 23 are arranged on the front and rear sides of the bogie frame 21, respectively. The wheel set 23 has a pair of wheels 231 on the left and right, and an axle 232 extending in the left-right direction. The left and right wheels 231 are fixed to both ends of the axle 232, respectively. Axle boxes 24 are arranged on the left and right sides of the wheel set 23, respectively. The axle 232 is rotatably supported by bearings (not shown) provided in the axle box 24.

[0021] FIG. 2 is a top view of the bogie 20. Note that the air springs 22 and the wheel sets 23 are omitted in FIG. 2. Referring to FIG. 1 and FIG. 2, the bogie frame 21 includes two side beams 30, two cross beams 40, and two relay pipes 50. The two side beams 30 are arranged side by side in the left-right direction. Each of the two side beams 30 extends in the front-rear direction. The two cross beams 40 are arranged side by side in the front-rear direction between the left and right side beams 30. Each of the two cross beams 40 extends in the left-right direction and is joined to both of the two side beams 30. Each of the two relay pipes 50 is arranged side by side in the left-right direction between the front and rear cross beams 40. Each of the two relay pipes 50 extends in the front-rear direction and is joined to both of the two cross beams 40.

[0022] The side beams 30 include a main body 31 extending in the front-rear direction, and spring caps 32 connected to the front and rear ends, respectively, of the main body 31. An axle spring 33 (FIG. 1) is housed in each of the front and rear spring caps 32. The side beams 30 are supported by the axle boxes 24 via the axle springs 33. In other words, the bogie frame 21 is supported by the front and rear wheel sets 23.

[0023] The side beam 30 and the cross beam 40 each have a closed cross section. In this embodiment, the cross beam 40 is connected to the surface of the side beam 30. In other words, the side beam 30 and the cross beam 40 are not connected to each other internally, and air cannot be transported between them. Each side beam 30 has a closed internal space. Each cross beam 40 has a closed internal space. In this embodiment, the left and right air springs 22 are installed on the left and right side beams 30, respectively, and are connected to the left and right side beams 30. In other words, each of the left and right side beams 30 serves as an auxiliary air chamber for the air spring 22.

[0024] The bogie 20 further includes a first pipe 25 and a second pipe 26. Each of the first pipe 25 and the second pipe 26 is, for example, a hose whose main material is rubber. Each of the first pipe 25 and the second pipe 26 may be a metal pipe. The first pipe 25 is connected to a first connection portion 251 provided forward of the center in the front-rear direction of the bogie frame 21, and extends forward from the first connection portion 251. The first connection portion 251 is provided on the front cross beam 40 of the two cross beams 40. The first connection portion 251 is, for example, a hole that opens forward. The first pipe 25 communicates with the internal space of the front cross beam 40 via the first connection portion 251.

[0025] The second piping 26 is connected to a second connection portion 261 provided rearward of the center in the fore-and-aft direction of the bogie frame 21, and extends rearward from the second connection portion 261. The second connection portion 261 is provided on the rear cross beam 40 of the two cross beams 40. The second connection portion 261 is, for example, a hole that opens rearward. The second piping 26 communicates with the internal space of the rear cross beam 40 via the second connection portion 261. The positions at which the first connection portion 251 and the second connection portion 261 are provided on the cross beam 40 are not particularly limited, but are, for example, the center in the left-right direction.

[0026] The two relay pipes 50 are connected to the two cross beams 40, respectively, at their interiors. In other words, the internal space of the front cross beam 40 communicates with the internal space of the rear cross beam 40 through the relay pipe 50. In this case, the interior of the bogie frame 21 is continuous between the first connection portion 251 and the second connection portion 261. Therefore, the portion of the bogie frame 21 between the first connection portion 251 and the second connection portion 261 can be used as a piping for transporting air. Specifically, the two cross beams 40 and the two relay pipes 50 of the bogie frame 21 can be used as an air transport path. Furthermore, the two cross beams 40 and the two relay pipes 50 can also be treated as an air tank of the railway vehicle 1.

[0027] In this embodiment, the two cross beams 40 and the two relay pipes 50 are used as piping for transporting compressed air. The compressed air is generated by a compressor (not shown). The generated compressed air is accumulated in an air reservoir (not shown). The compressor and the air reservoir are attached to the bottom of the car body 10. The compressor and the air reservoir are disposed in the center of the car body 10 in the fore-and-aft direction. In other words, the compressor and the air reservoir are disposed between the bogies 20 in the railcar 1. One compressor may be shared between adjacent railcars 1. In this case, of two adjacent railcars 1, one railcar 1 is provided with both a compressor and an air reservoir, and the other railcar 1 is provided with an air reservoir without a compressor.

[0028] For example, the cross beam 40 and the relay pipe 50 can be used as piping for connecting an air reservoir and a coupler in the railway vehicle 1. The cross beam 40 and the relay pipe 50 may also be used as piping for connecting air reservoirs of adjacent railway vehicles 1. The cross beam 40 and the relay pipe 50 may also be used as piping for supplying compressed air to other equipment that uses compressed air.

[0029] As an example of using two cross beams 40 and two relay pipes 50 as piping, a case where an air reservoir and a coupler are connected in the railway vehicle 1 according to this embodiment will be described. For example, when the bogie 20 is the rear bogie among the bogies arranged at the front and rear of the car body 10, the front of the bogie 20 is the center side in the longitudinal direction of the car body 10, and the rear of the bogie 20 is the car end side (rear end side) of the car body 10. In this case, the first pipe 25 is connected to the air reservoir, and the second pipe 26 is connected to the coupler. The compressed air in the air reservoir is introduced from the first pipe 25 into the bogie frame 21 (into the two cross beams 40 and the two relay pipes 50). This compressed air flows through the transport path shown by the dotted arrow in FIG. 2, and is introduced into the coupler through the second pipe 26.

[0030] When the bogie 20 is a bolsterless bogie, usually, either the side beam 30 or the cross beam 40 is used as the auxiliary air chamber of the air spring 22. Here, if compressed air is introduced into one of the side beams 30 and the cross beam 40 that is used as the auxiliary air chamber of the air spring 22, it will affect the height of the air spring 22. Therefore, of the side beams 30 and the cross beams 40, the one that is not used as the auxiliary air chamber of the air spring 22 is used as the transport path of the compressed air. In the example of this embodiment, as described above, since the side beam 30 is used as the auxiliary air chamber of the air spring 22, the cross beam 40 (and the relay pipe 50) is used as the transport path of the compressed air.

[0031] [effect] The first pipe 25 and the second pipe 26 are connected to the bogie frame 21 of the railcar 1 according to this embodiment. The inside of the bogie frame 21 is continuous from the first connection part 251 to which the first pipe 25 is connected to the second connection part 261 to which the second pipe 26 is connected. Therefore, the part of the bogie frame 21 between the first connection part 251 and the second connection part 261 can be used as a pipe for transporting compressed air. Specifically, the front cross beam 40 on which the first connection part 251 is provided, the two relay pipes 50, and the rear cross beam 40 on which the second connection part 261 is provided can be used as a pipe for transporting air. In this case, no work is required to install pipes in the gap between the bogie 20 and the car body 10 near the center part of the bogie 20 in the front-rear direction. Therefore, according to the railcar 1 according to this embodiment, the burden of the work of installing the pipes can be reduced.

[0032] [Second embodiment] 3 is a top view of the bogie 20 of the railway vehicle 1 of this embodiment. Referring to FIG. 3, in the bogie frame 21 of the railway vehicle 1 of this embodiment, each of the two cross beams 40 penetrates each of the two side beams 30. Each of the two penetrating cross beams 40 is connected to both of the two air spring pedestals 60. The two air spring pedestals 60 are provided on the outer sides of the two side beams 30 in the left and right directions, respectively. The interiors of the two air spring pedestals 60 are continuous with each of the two cross beams 40. Even in this embodiment, the interiors of the side beams 30 and the cross beams 40 are not continuous with each other, and air cannot be transported between them.

[0033] In this embodiment, the left and right air springs 22 (FIG. 1) are respectively installed on the left and right air spring pedestals 60 and connected to the air spring pedestals 60. In other words, the cross beam 40 and the air spring pedestals 60 serve as auxiliary air chambers for the air springs 22.

[0034] The first connection portion 251 is provided at the front end portion of the main body 31 of one of the two side beams 30. The second connection portion 261 is provided at the rear end portion of the main body 31 of one of the side beams 30 (the side beam 30 having the first connection portion 251 provided at its front end portion). Each of the first connection portion 251 and the second connection portion 261 is, for example, a hole that opens upward. The interior of one of the side beams 30 is continuous between the first connection portion 251 and the second connection portion 261.

[0035] In the railcar 1 according to this embodiment, the bogie 20 further includes a third pipe 27 and a fourth pipe 28. Each of the third pipe 27 and the fourth pipe 28 is, for example, a hose whose main material is rubber. Each of the third pipe 27 and the fourth pipe 28 may be a metal pipe. The third pipe 27 is connected to a third connection portion 271 provided forward of the center in the front-rear direction of the bogie frame 21, and extends forward from the third connection portion 271. The third connection portion 271 is provided at a front end portion of the main body 31 of the other side beam 30 (the side beam 30 on which the first connection portion 251 and the second connection portion 261 are not provided) of the two side beams 30. The fourth pipe 28 is connected to a fourth connection portion 281 provided rearward of the center in the front-rear direction of the bogie frame 21, and extends rearward from the fourth connection portion 281. The fourth connection portion 281 is provided at the rear end portion of the main body 31 of the other side beam 30 .

[0036] Each of the third connection portion 271 and the fourth connection portion 281 is, for example, a hole that opens upward. Between the third connection portion 271 and the fourth connection portion 281, the inside of the other side beam 30 is continuous.

[0037] In the railway vehicle 1 according to this embodiment, the portion between the first connection portion 251 and the second connection portion 261 of one side beam 30 can be used as a pipe for transporting air. Furthermore, the portion between the third connection portion 271 and the fourth connection portion 281 of the other side beam 30 can also be used as a pipe for transporting air. In short, according to the railway vehicle 1 according to this embodiment, both of the two side beams 30 can be used as air transport paths.

[0038] The embodiments of the present disclosure have been described above. However, the above-described embodiments are merely examples for implementing the present disclosure. Therefore, the present disclosure is not limited to the above-described embodiments, and can be implemented by appropriately modifying the above-described embodiments without departing from the spirit of the present disclosure.

[0039] In the above embodiment, the bogie 20 is a bolsterless bogie. However, the bogie 20 may be a bolstered bogie having a bolster. In this case, the bolster serves as an auxiliary air chamber for the air spring 22. In other words, neither the side beam 30 nor the cross beam 40 is used as an auxiliary air chamber. Therefore, both the side beam 30 and the cross beam 40 can be used as an air transport path. In this case, the side beam 30 and the cross beam 40 are connected to each other internally, allowing air transport between them.

[0040] In the above embodiment, the bogie frame 21 includes two cross beams 40. However, the bogie frame 21 may have only one cross beam 40. In this case, both the first connection portion 251 and the second connection portion 261 may be provided on the cross beam 40. [Explanation of symbols]

[0041] 1:Railway vehicles 10: Body 20: Cart 21: Truck frame 25: First pipe 251: First connection part 26: Second piping 261: Second connection part 27: 3rd piping 271: Third connection part 28: 4th pipe 281: 4th connection part 30: Side beam 40: Horizontal

Claims

1. a bogie including: a bogie frame; a first piping connected to a first connection portion provided forward of a center of the bogie frame in a front-rear direction and extending forward from the first connection portion; and a second piping connected to a second connection portion provided rearward of the center of the bogie frame in the front-rear direction and extending rearward from the second connection portion; a car body supported on the bogie; a railroad vehicle, wherein an interior of the bogie frame is continuous between the first connection portion and the second connection portion.

2. 2. The railway vehicle according to claim 1, The bogie frame includes: Two side beams each extending in the front-to-rear direction; Two cross beams each extending in the left-right direction and joined to both of the two side beams; a relay pipe connected to both of the two cross beams and having an interior continuous with each of the two cross beams; The first connection portion is provided on a front cross beam of the two cross beams, The second connection portion is provided on a rear one of the two cross beams.

3. 2. The railway vehicle according to claim 1, The bogie frame includes: Two side beams each extending in the front-to-rear direction; A cross beam extending in the left-right direction and joined to both of the two side beams; The first connection portion is provided at a front end portion of one of the two side beams, The second connection portion is provided at a rear end portion of the one side beam, A railway vehicle, wherein the interior of the one side beam is continuous between the first connection portion and the second connection portion.

4. 4. The railway vehicle according to claim 3, The cart is a third pipe connected to a third connection portion provided at a front end portion of the other of the two side beams and extending forward from the third connection portion; A fourth pipe is connected to a fourth connection portion provided at a rear end portion of the other side beam and extends rearward from the fourth connection portion, A railway vehicle, wherein the interior of the other side beam is continuous between the third connection portion and the fourth connection portion.

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