JP2021017147A - Truck for railway vehicle and railway vehicle - Google Patents

Abstract

To provide a truck for a railway vehicle and a railway vehicle capable of improving ride quality of the railway vehicle and maintaining a vehicle body at an appropriate angle when the railway vehicle passes through a curve section.SOLUTION: A truck 10 for a railway vehicle includes a truck frame 12 and a pair of pneumatic springs 18. The truck frame 12 has a pair of auxiliary air chambers 24 provided corresponding to each of the pair of pneumatic springs 18 and a pair of valve devices 46 provided corresponding to each of the pair of auxiliary air chambers 24. Each auxiliary air chamber 24 includes a first air chamber 40 communicating with the pneumatic spring 18 and a second air chamber 42 communicating with the first air chamber 40 through a connection part 45. The valve device 46 brings the connection part 45 into an opened state when the pneumatic pressure inside the pneumatic spring 18 and the first air chamber 40 is a predetermined value or less and brings the connection part 45 into a closed state when the pneumatic pressure exceeds the predetermined value.SELECTED DRAWING: Figure 2

Description

The present invention relates to a bogie for a railroad vehicle and a railroad vehicle.

In railway vehicles, it is required to suppress the vibration of the vehicle body to improve the riding comfort. Therefore, conventionally, in order to improve the riding comfort of a railroad vehicle, an air spring is provided on the bogie for the railroad vehicle.

For example, the bogie frame disclosed in Patent Document 1 includes a pair of side beam members and a pair of cross beam members. The pair of cross beam members are provided so as to penetrate the pair of side beam members. A pair of pillow spring receivers are provided so as to connect both ends of the pair of cross beam members on the outer side of the pair of side beam members in the vehicle width direction, and the bottom of the vehicle body is supported on the pair of pillow spring receivers. An air spring is provided.

Japanese Unexamined Patent Publication No. 2011-255754

In the bogie frame as described above, it is conceivable to reduce the rigidity of the air spring in order to suppress the vibration of the vehicle body. As a result, it is possible to suppress the transmission of vibration from the bogie frame to the vehicle body, and it is possible to suppress the vibration of the vehicle body.

However, if the rigidity of the air spring is lowered, when the railroad vehicle passes through the curved section, the vehicle body is greatly tilted outward due to centrifugal force, and it becomes difficult to tilt the vehicle body at an appropriate angle. This problem becomes more pronounced as the number of passengers increases.

Therefore, an object of the present invention is to provide a bogie for a railroad vehicle and a railroad vehicle capable of improving the riding comfort of the railroad vehicle and maintaining the vehicle body at an appropriate angle when the railroad vehicle passes through a curved section. It is said.

The gist of the present invention is the following bogies for railroad vehicles and railroad vehicles.

(1) A bogie frame provided with a pair of side beams extending in the front-rear direction and a cross beam extending in the vehicle width direction so as to connect the pair of side beams.
A bogie for railway vehicles provided with a pair of air springs provided on one side and the other side of the bogie frame in the vehicle width direction and supporting the vehicle body, respectively.
A pair of auxiliary air chambers provided corresponding to the pair of air springs, and
It has a pair of valve devices provided corresponding to the pair of auxiliary air chambers, respectively.
Each of the pair of auxiliary air chambers
The first air chamber communicating with the air spring and
The second air chamber and
A connection portion for connecting the first air chamber and the second air chamber is provided.
Each of the pair of valve devices is provided so that the connection portion can be opened and closed, and when the air pressure in the air spring and the first air chamber is equal to or less than a predetermined value, the connection portion is opened, and the air spring and the first air chamber are opened. When the air pressure in the first air chamber exceeds the predetermined value, the connection portion is closed.
When the connection portion is in the open state, the first air chamber and the second air chamber communicate with each other via the connection portion, and when the connection portion is in the closed state, the first air chamber and the second air chamber are communicated with each other. A bogie for railroad vehicles that cuts off communication with the room.

(2) At least a part of the first air chamber is provided in one of the side beam and the cross beam, and at least a part of the second air chamber is provided in the other of the side beam and the cross beam. The railroad vehicle bogie according to (1) above, which is provided.

(3) Further provided with a bolster provided between the bogie frame and the vehicle body.
The railway according to (1) above, wherein the first air chamber is provided in one of the bolster and the bogie frame, and the second air chamber is provided in the other of the bolster and the bogie frame. Bogie for vehicles.

(4) A railroad vehicle provided with the bogie for railroad vehicles according to any one of (1) to (3) above.

According to the present invention, it is possible to improve the riding comfort of a railroad vehicle and prevent an excessive inclination of the vehicle body when the railroad vehicle passes through a curved section.

FIG. 1 is a plan view schematically showing a bogie for a railroad vehicle according to an embodiment of the present invention. FIG. 2 is a front view schematically showing a railroad vehicle. FIG. 3 is a diagram for explaining the internal structure of the passage forming member. FIG. 4 is a front view schematically showing a railroad vehicle.

Hereinafter, a railroad vehicle bogie and a railroad vehicle according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view (viewed from above) schematically showing a bogie 10 for railway vehicles (hereinafter, abbreviated as bogie 10) according to an embodiment of the present invention. Further, FIG. 2 is a front view schematically showing a bogie 10 and a railroad vehicle 100 provided with a car body 36 supported by the bogie 10. Note that FIG. 2 is a diagram for explaining the configuration of the auxiliary air chamber 24, which will be described later, and FIG. 2 schematically shows the structure of the auxiliary air chamber 24 and its surroundings in a cross-sectional view.

With reference to FIGS. 1 and 2, the bogie 10 includes a bogie frame 12, a plurality of wheels 14, a plurality of axles 16, and a pair of air springs 18. The bogie frame 12 includes a pair of side beams 20 extending in the front-rear direction (traveling direction of the railcar) of the bogie 10, a pair of cross beams 22 extending in the vehicle width direction of the bogie 10 so as to connect the pair of side beams 20. A pair of auxiliary air chambers 24 (see FIG. 2) provided corresponding to the air springs 18 and a pair of passage forming members 44 (see FIG. 2) provided corresponding to the pair of auxiliary air chambers 24, respectively. It is provided with a pair of valve devices 46 (see FIG. 2) provided corresponding to the auxiliary air chambers 24 of the above. In FIG. 1, the passage forming member 44 and the valve device 46 are not shown in order to avoid complicating the drawings.

With reference to FIG. 1, an axle 16 serving as a rotation axis of the pair of wheels 14 is rotatably supported at the front end portion of the pair of side beams 20. Similarly, an axle 16 serving as a rotation axis of the pair of wheels 14 is rotatably supported at the rear end portion of the pair of side beams 20.

The cross beam 22 is joined to the pair of side beams 20. In the present embodiment, the cross beam 22 includes a pair of pipe members 26, a pair of outer connecting members 28, and a pair of inner connecting members 30. Each of the pair of pipe members 26 extends in the vehicle width direction so as to penetrate the pair of side beams 20. The pair of outer connecting members 28 connect the pair of pipe members 26 on the outer side in the vehicle width direction with respect to the pair of side beams 20. Each of the pair of inner connecting members 30 connects the pair of pipe members 26 inside the pair of side beams 20 in the vehicle width direction.

With reference to FIG. 2, the bogie frame 12 is supported by the axle 16 via a plurality of elastic members 32. With reference to FIGS. 1 and 2, the pair of air springs 18 are provided at both ends of the bogie frame 12 in the vehicle width direction. Specifically, one air spring 18 is provided on one side of the center of the bogie frame 12 in the vehicle width direction, and the other air spring 18 is provided on the other side of the center of the bogie frame 12 in the vehicle width direction. It is provided. With reference to FIG. 2, in this embodiment, each air spring 18 is supported by a side beam 20 and an outer connecting member 28 via a receiving seat 34. In this embodiment, the vehicle body 36 is supported by a pair of air springs 18. That is, the vehicle body 36 is supported by the bogie frame 12 via a pair of air springs 18. In the example shown in FIG. 2, the pair of air springs 18 support the bottom of the vehicle body 36, but as will be described later, the pair of air springs 18 may support the vehicle body 36 via the bolster. ..

With reference to FIG. 2, each auxiliary air chamber 24 includes a first air chamber 40, a second air chamber 42, and a connection portion 45. In the present embodiment, the pair of side beams 20, the cross beams 22, the pair of outer connecting members 28, and the pair of inner connecting members 30 each have a hollow portion inside. In the present embodiment, the first air chamber 40 and the second air chamber 42 are formed by partitioning the inside of the hollow portion of the bogie frame 12. In the present embodiment, at least a part of the first air chamber 40 is provided in one of the side beam 20 and the cross beam 22, and at least a part of the second air chamber 42 is in the side beam 20 and the cross beam 22. It is provided on the other side. More specifically, in the present embodiment, the first air chamber 40 is provided inside the side beam 20 and the cross beam 22, and the second air chamber 42 is provided inside the cross beam 22. The first air chamber 40 communicates with the internal space of the air spring 18.

FIG. 3 is a diagram for explaining the internal structure of the passage forming member 44. In FIG. 3, (a) is a schematic cross-sectional view showing a passage forming member 44 when the connecting portion 45 is in the open state, and (b) is a schematic cross-sectional view showing the connecting portion 45 in the closed state. It is the schematic sectional drawing which shows the passage forming member 44 of the case.

With reference to FIG. 2, each of the pair of passage forming members 44 is provided on one of the pipe members 26. With reference to FIGS. 2 and 3, a first passage 44a, a second passage 44b, an opening 44c, an adjusting chamber 44d, and an opening chamber 44e are formed in the passage forming member 44.

The first passage 44a communicates with the first air chamber 40, and the second passage 44b communicates with the second air chamber 42. The opening 44c is a portion connecting the first passage 44a and the second passage 44b. The adjusting chamber 44d is provided above the first passage 44a, and the opening chamber 44e is provided between the first passage 44a and the adjusting chamber 44d. In the present embodiment, the first passage 44a, the second passage 44b, and the opening 44c function as a connecting portion 45 that communicates the first air chamber 40 and the second air chamber 42.

In the present embodiment, the valve device 46 is configured as a cutoff valve and is provided in the passage forming member 44. With reference to FIG. 3, the valve device 46 has a main body portion 50, a flexible portion 52, a flexible portion 54, and an urging member 56.

The main body 50 has a shaft portion 50a, a flange portion 50b provided at the upper end portion of the shaft portion 50a, a flange portion 50c provided at the lower end portion of the shaft portion 50a, and a substantially central portion of the shaft portion 50a in the vertical direction. It has a flange portion 50d provided on the. Further, an internal passage 50e is formed in the main body 50 so as to communicate the first passage 44a and the adjusting chamber 44d. In the present embodiment, the main body portion 50 is attached to the inner wall of the passage forming member 44 via the flexible portions 52 and 54.

The flexible portion 52 is made of an elastically deformable material (for example, rubber). The flexible portion 52 has a ring shape and is provided so as to connect the outer peripheral portion of the flange portion 50b and the inner wall of the passage forming member 44. The flange portion 50b and the flexible portion 52 function as the first diaphragm 58. In the present embodiment, the first diaphragm 58 also functions as a partition wall between the adjusting chamber 44d and the opening chamber 44e.

The flexible portion 54 is made of an elastically deformable material (for example, rubber). The flexible portion 54 has a ring shape and is provided so as to connect the outer peripheral portion of the flange portion 50d and the inner wall of the passage forming member 44. The flange portion 50d and the flexible portion 54 function as a second diaphragm 60. In the present embodiment, the second diaphragm 60 also functions as a partition wall between the first passage 44a and the open chamber 44e. As shown by the arrow of the alternate long and short dash line in FIG. 3A, in the present embodiment, air can flow between the first passage 44a and the adjustment chamber 44d via the internal passage 50e of the main body 50. .. The open chamber 44e communicates with the outside of the passage forming member 44.

The flange portion 50c is provided in the first passage 44a. As will be described later, the flange portion 50c functions as a valve body that opens and closes the opening 44c. The urging member 56 is provided so as to pass through the opening 44c and support the flange portion 50c from below. The urging member 56 is, for example, a coil spring, and urges the flange portion 50c upward.

In the present embodiment, as described above, air can flow between the first passage 44a and the adjusting chamber 44d via the internal passage 50e of the shaft portion 50a. Therefore, the air pressure in the first passage 44a and the air pressure in the adjusting chamber 44d are equal to each other. Further, in the present embodiment, the area of the first diaphragm 58 is larger than the area of the second diaphragm 60 when viewed from above. Therefore, the force of the air in the adjusting chamber 44d pushing the first diaphragm 58 downward is larger than the force of the air in the first passage 44a pushing the second diaphragm 60 upward.

Regarding the above points, in the present embodiment, the urging member 56 urges the flange portion 50c upward. Therefore, when the difference between the force of the air in the adjusting chamber 44d pushing the first diaphragm 58 downward and the force of the air in the first passage 44a pushing the second diaphragm 60 upward is small (in the first passage 44a and in the first passage 44a). When the air pressure in the adjusting chamber 44d is small), the flange portion 50c (main body portion 50) is supported by the urging member 56 at a position separated above the opening 44c. In this case, air can flow between the first air chamber 40 and the second air chamber 42 via the connecting portion 45. That is, the connection portion 45 is in the open state.

On the other hand, when the difference between the force by which the air in the adjusting chamber 44d pushes the first diaphragm 58 downward and the force by which the air in the first passage 44a pushes the second diaphragm 60 upward becomes large (in the first passage 44a and the adjustment). (When the air pressure in the chamber 44d increases), the flange portion 50c moves downward while compressing the urging member 56. Then, when the air pressure in the first passage 44a and the adjusting chamber 44d (that is, the air pressure in the first air chamber 40) exceeds a predetermined value, the flange portion 50c opens as shown in FIG. 3B. The portion 44c is closed. As a result, the flow of air between the first air chamber 40 and the second air chamber 42 is blocked. That is, the connecting portion 45 is closed.

As described above, in the present embodiment, the flange portion 50c (main body portion 50) of the valve device 46 moves in the vertical direction according to the air pressure. As a result, the flange portion 50c opens and closes the connection portion 45 (opening 44c). Specifically, referring to FIG. 2, the load applied from the vehicle body 36 to the air spring 18 is small, and the air pressure in the air spring 18, the first air chamber 40, the first passage 44a, and the adjustment chamber 44d is predetermined. If it is less than or equal to the value, the flange portion 50c is separated upward from the opening 44c, and the connecting portion 45 is in the open state. On the other hand, referring to FIG. 4, the load applied from the vehicle body 36 to the air spring 18 becomes large, and the air pressure in the air spring 18, the first air chamber 40, the first passage 44a, and the adjusting chamber 44d becomes a predetermined value. When it exceeds, the flange portion 50c closes the opening 44c, and the connecting portion 45 is closed.

With reference to FIGS. 2 and 3A, when the connecting portion 45 is in the open state, the first air chamber 40 and the second air chamber 42 communicate with each other via the connecting portion 45. Therefore, the first air chamber 40 and the second air chamber 42 communicate with the air spring 18. On the other hand, when the connecting portion 45 is in the closed state, the communication between the first air chamber 40 and the second air chamber 42 is cut off. That is, the communication between the second air chamber 42 and the air spring 18 is cut off. In this case, the capacity of the auxiliary air chamber is substantially smaller than that in the case where the first air chamber 40 and the second air chamber 42 communicate with each other. As a result, when the connecting portion 45 is in the closed state, the rigidity of the air spring 18 is higher than when the connecting portion 45 is in the open state.

As described above, in the present embodiment, the rigidity of each air spring 18 can be adjusted according to the load received from the vehicle body 36. For example, assume that the vehicle body 36 is tilted to one side in the vehicle width direction when the railway vehicle 100 passes through a curved section. At this time, when the load applied to the air spring 18 on one side from the vehicle body 36 in the vehicle width direction increases and the air pressure in the air spring 18 and the first air chamber 40 exceeds a predetermined value, the flange portion 50c The opening 44c is closed and the connection 45 is closed. As a result, the rigidity of the air spring 18 on one side increases in the vehicle width direction, and it is possible to prevent the vehicle body 36 from tilting too much. The predetermined value can be set in advance by adjusting the configuration of the valve device 46 according to the structure of the railway vehicle 100 and the like.

As described above, in the present embodiment, even when the rigidity of the air spring 18 in the normal state is set low, the rigidity of the air spring 18 can be increased when a large load is applied to the air spring 18. .. As a result, it is possible to maintain the vehicle body 36 at an appropriate angle when the railway vehicle 100 passes through the curved section while improving the riding comfort of the railway vehicle 100 in a normal state.

In the present embodiment, when the number of passengers of the railroad vehicle 100 increases, the connection portion 45 is closed and the rigidity of the air spring 18 increases even when the railroad vehicle 100 is traveling in a straight section. Conceivable. However, when there are many passengers, the weight of the vehicle body 36 (weight including passengers) increases, so that even if the rigidity of the air spring 18 increases, it is possible to suppress the occurrence of large vibrations in the vehicle body 36. Therefore, even if the rigidity of the air spring 18 is increased, it is possible to suppress the deterioration of the riding comfort.

In the above-described embodiment, the case where the pair of passage forming members 44 and the pair of valve devices 46 are provided on one of the pipe members 26 has been described, but the valve devices 46 are provided so as to correspond to the respective air springs 18. Just do it. Therefore, one pipe member 26 may be provided with one passage forming member 44 and one valve device 46, and the other pipe member 26 may be provided with the other passage forming member 44 and the other valve device 46. Further, the number of passage forming members 44 and valve devices 46 is not limited to the above example, and a plurality of passage forming members 44 and a plurality of valve devices 46 are provided so as to correspond to one air spring 18, and the other air. A plurality of passage forming members 44 and a plurality of valve devices 46 may be provided so as to correspond to the spring 18.

The configuration of the valve device is not limited to the above example, and any configuration may be used as long as the connection portion can be opened and closed according to the air pressure in the air spring and the first air chamber. Therefore, for example, a solenoid valve may be used as the valve device. In this case, for example, a detector for detecting the air pressure in the air spring or the first air chamber is provided, and a plunger (valve body) for opening and closing the connection portion is provided based on the air pressure detected by the detector. You may move it. Further, although detailed description is omitted, an electric valve using a motor may be used as the valve device. Further, the position of the valve device is not limited to the above-mentioned example, and the valve device may be provided at a position where the connection portion between the first air chamber and the second air chamber can be opened and closed.

Further, in the above-described embodiment, the case where the auxiliary air chamber 24 has the first air chamber 40 and the second air chamber 42 has been described, but the auxiliary air chamber 24 may have three or more air chambers. .. In this case, a valve device may be provided at each connection portion connecting the air chambers.

Further, the position where the auxiliary air chamber (the first air chamber 40, the second air chamber 42 and the connecting portion 45 in the above embodiment) is formed is not limited to the above example. Therefore, the first air chamber and the second air chamber may be formed inside the side beam 20 and the cross beam 22 at positions different from those of the first air chamber 40 and the second air chamber 42 shown in FIG. For example, the first air chamber may be formed inside the cross beam 22, and the second air chamber may be formed inside the side beam 20. Further, one or both of the first air chamber and the second air chamber may be formed outside the side beam 20 and the cross beam 22. Therefore, for example, one or both of the first air chamber and the second air chamber may be formed outside the bogie frame 12. Further, the position of the connecting portion is not limited to the above example, and for example, the connecting portion may be formed outside the side beam 20 and the cross beam 22.

Further, in the examples shown in FIGS. 2 and 4, the air spring 18 and the first air chamber 40 communicate with each other in the outer connecting member 28, but the position where the air spring 18 is provided is not limited to the above example. For example, the air spring 18 may be provided so that the air spring 18 and the first air chamber 40 communicate with each other in the side beam 20, and the air spring 18 and the first air chamber 40 may communicate with each other in the pipe member 26. An air spring 18 may be provided.

In the above-described embodiment, the case where the present invention is applied to a bolsterless carriage has been described, but the present invention may be applied to a carriage provided with a bolster. In this case, the bolster may be provided with a part or all of the auxiliary air chamber. Specifically, for example, the first air chamber may be provided in one of the bolster and the bogie frame, and the second air chamber may be provided in the other of the bolster and the bogie frame. When the present invention is applied to a direct mount type bogie in which a pair of air springs is provided between the bolster and the vehicle body, the bolster is provided with a first air chamber, a passage forming member, a valve device and a second air chamber. The bolster may be provided with a first air chamber, the bogie frame may be provided with a second air chamber, and a passage forming member and a valve device may be provided between the bolster and the bogie frame. Further, for example, when the present invention is applied to an indirect mount type bogie in which a pair of air springs is provided between the bolster and the bogie frame, the first air chamber is provided in either the bolster or the bogie frame. , A passage forming member, a valve device and a second air chamber may be provided, a first air chamber is provided in the bolster, a second air chamber is provided in the bogie frame, and a passage forming member and a valve are provided between the bolster and the bogie frame. The device may be provided, a first air chamber may be provided in the bogie frame, a second air chamber may be provided in the bolster, and a passage forming member and a valve device may be provided between the bolster and the bogie frame.

According to the present invention, the riding comfort of a railroad vehicle is improved, and the vehicle body can be maintained at an appropriate angle when the railroad vehicle passes through a curved section. Therefore, the present invention can be suitably used in various railway vehicles.

10 Bogie for railcars 12 Bogie frame 14 Wheels 16 Axles 18 Air springs 20 Side beams 22 Cross beams 24 Auxiliary air chambers 26 Pipe members 28 Outer connecting members 30 Inner connecting members 32 Elastic members 34 Receiving seat 36 Body 40 First air chamber 42 No. 2 Air chamber 45 Connection part 46 Valve device 50 Main body part 52, 54 Flexible part 56 Biasing member

Claims (4)

A bogie frame having a pair of side beams extending in the front-rear direction and a cross beam extending in the vehicle width direction so as to connect the pair of side beams.
A bogie for railway vehicles provided with a pair of air springs provided on one side and the other side of the bogie frame in the vehicle width direction and supporting the vehicle body, respectively.
A pair of auxiliary air chambers provided corresponding to the pair of air springs, and
It has a pair of valve devices provided corresponding to the pair of auxiliary air chambers, respectively.
Each of the pair of auxiliary air chambers
The first air chamber communicating with the air spring and
The second air chamber and
A connection portion for connecting the first air chamber and the second air chamber is provided.
Each of the pair of valve devices is provided so that the connection portion can be opened and closed, and when the air pressure in the air spring and the first air chamber is equal to or less than a predetermined value, the connection portion is opened to open the air spring and the first air spring. When the air pressure in the air chamber exceeds the predetermined value, the connection portion is closed.
When the connection portion is in the open state, the first air chamber and the second air chamber communicate with each other via the connection portion, and when the connection portion is in the closed state, the first air chamber and the second air chamber are communicated with each other. A bogie for railroad vehicles that cuts off communication with the room. At least a part of the first air chamber is provided on one of the side beam and the cross beam, and at least a part of the second air chamber is provided on the other of the side beam and the cross beam. The carriage for railroad vehicles according to claim 1. Further provided with a bolster provided between the bogie frame and the vehicle body,
The railway vehicle according to claim 1, wherein the first air chamber is provided in one of the bolster and the bogie frame, and the second air chamber is provided in the other of the bolster and the bogie frame. Bogie. A railroad vehicle provided with the bogie for railroad vehicles according to any one of claims 1 to 3.

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