Railway vehicle bogies

Abstract

To provide a railroad vehicle carriage capable of improving steering property in curve segments while maintaining travelling stability in a straight line section.SOLUTION: A railroad vehicle carriage includes: a carriage frame; a first axle box and a second axel box for respectively retaining different axles; a first support device for supporting the first axle box; and a second support device for supporting the second axel box in a position deviated from the first support device in the rail direction of the carriage frame. The first support device and the second support device include: a first elastic body elastically deformed in at least one direction of a vertical direction, a rail direction, and a sleeper direction; a retaining member for retaining the first elastic body; and an interfering member sandwiched between the carriage frame and the retaining member. The interfering member of the second support device is harder than the interfering member for the first support device.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a bogie for a rail vehicle. [Background technology]

[0002] An axle box that holds the axle is connected to the bogie of a railway vehicle via an axle box suspension device. The axle box suspension device has elastic bodies (such as axle springs and laminated rubber) that support loads in the up-down direction of the axle box, the direction of the sleepers, and the direction of the rail (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6309596 Summary of the Invention [Problem to be solved by the invention]

[0004] If the axle box suspension is too rigid in the direction of the rail (i.e., the axle box is less likely to deform), steering performance on curved sections will be reduced and the angle of attack, which is the difference between the direction of the wheels and the direction of travel, will increase. A larger angle of attack can cause squealing noise and increase wheel and rail wear.

[0005] In response to this, the angle of attack can be reduced by reducing the rigidity of the axle box suspension in the rail direction (i.e., making it easier for the axle box to displace). However, reducing the rigidity of the axle box suspension reduces the running stability of the railway vehicle on straight sections.

[0006] An object of one aspect of the present disclosure is to provide a bogie for a railway vehicle that can improve steering performance in curved sections while maintaining running stability in straight sections. [Means for solving the problem]

[0007] One aspect of the present disclosure is a bogie for a railway vehicle that includes a bogie frame, a first axle box and a second axle box that each hold a different axle, a first support device that supports the first axle box, and a second support device that supports the second axle box at a position offset from the first support device in the rail direction of the bogie frame.

[0008] The first support device and the second support device each include a first elastic body configured to elastically deform in at least one of the vertical direction, the rail direction, and the sleeper direction, a holding member supported by the bogie frame and holding the first elastic body, and an intervening member sandwiched between the bogie frame and the holding member. The intervening member of the second support device is harder than the intervening member of the first support device.

[0009] With this configuration, the difference in hardness of the intervening member allows the rigidity of the first support device to be smaller than the rigidity of the second support device. Therefore, by locating the first support device forward in the rail direction of the railway vehicle, maneuverability in curved sections can be improved. Furthermore, the rigidity of the second support device can maintain running stability in straight sections.

[0010] In one aspect of the present disclosure, the first support device and the second support device may each further include a second elastic body configured to elastically deform in at least one of the vertical direction, the rail direction, and the sleeper direction, independent of the first elastic body. The second elastic body of the first support device may be softer than the second elastic body of the second support device. This configuration effectively reduces the rigidity of the first support device while maintaining the rigidity of the second support device. This can further improve maneuverability in curved sections.

[0011] In one aspect of the present disclosure, in each of the first support device and the second support device, the first elastic body may be configured to elastically deform at least in the vertical direction, and the second elastic body may be configured to elastically deform at least in the rail direction. With this configuration, the intervening member and the second elastic body each contribute to the rigidity of the first support device in the rail direction (i.e., the front-to-rear direction). This makes it easier for the first axle box to rotate in a horizontal plane (i.e., around an axis parallel to the vertical direction), thereby promoting the effect of improving steering performance in curved sections.

[0012] In one aspect of the present disclosure, in each of the first support device and the second support device, the first elastic body may be a coil spring, the holding member may have an insertion portion that penetrates the bogie frame, and the intervening member may be a cylindrical body disposed between the insertion portion and the bogie frame. With this configuration, it is possible to improve steerability in curved sections while suppressing transmission of vibrations from the first support device and the second support device to the bogie frame. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1A is a schematic bottom view of a railway vehicle in an embodiment traveling on a straight section, and FIG. 1B is a schematic bottom view of a railway vehicle in an embodiment traveling on a curved section. [Figure 2] FIG. 2 is a schematic plan view of the railcar bogie of FIG. [Figure 3] FIG. 3 is a schematic partial cross-sectional view of the first support device of FIG. 2 as viewed from the side. [Figure 4] FIG. 4 is a schematic plan view of the first support device of FIG. [Figure 5] FIG. 5 is a schematic enlarged view of the vicinity of the lid in FIG. [Figure 6] FIG. 6 is a schematic cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 7 is a schematic cross-sectional view taken along line VII-VII in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings. [1. First embodiment] [1-1.Configuration] The railway vehicle 100 shown in FIG. 1A includes a car body 101, a first bogie 1A, a second bogie 1B, a first axle 102A, a second axle 102B, a third axle 102C, a fourth axle 102D, and a plurality of wheels 103.

[0015] The first bogie 1A and the second bogie 1B support the car body 101 from below. The first bogie 1A and the second bogie 1B are arranged apart from each other in the rail direction of the railway vehicle 100.

[0016] The first axle 102A and the second axle 102B are supported by the first bogie 1 A. The third axle 102C and the fourth axle 102D are supported by the second bogie 1 B. A plurality of wheels 103 are attached to the axles 102A-102D, respectively, and run on rails.

[0017] <First bogie> As shown in FIG. 2, the first bogie 1A has a bogie frame 2, a first axle box 3A (the so-called second axle box), a second axle box 3B (the so-called fourth axle box), a third axle box 3C (the so-called first axle box), a fourth axle box 3D (the so-called third axle box), a first support device 4A (the so-called second support device), a second support device 4B (the so-called fourth support device), a third support device 4C (the so-called first support device), and a fourth support device 4D (the so-called third support device).

[0018] (Bogie frame) The bogie frame 2 is attached to the lower part of the car body 101. The bogie frame 2 has a cross beam 21, a first side beam 22 (so-called second side beam), and a second side beam 23 (so-called first side beam).

[0019] The cross beam 21 extends in the sleeper direction (i.e., the extension direction of the sleepers) perpendicular to the rail direction of the railway vehicle 100. The first side beam 22 and the second side beam 23 are attached to the cross beam 21. The first side beam 22 and the second side beam 23 are arranged spaced apart from each other in the sleeper direction. The first side beam 22 and the second side beam 23 each extend in the rail direction.

[0020] The first side beam 22 has a first side beam outer end 22A to which the first support device 4A is attached, and a first side beam inner end 22B to which the second support device 4B is attached. The first side beam outer end 22A is disposed on the outer side of the first side beam inner end 22B in the rail direction (i.e., at a position farther from the second bogie 1B).

[0021] The second side beam 23 has a second side beam outer end 23A to which the third support device 4C is attached and a second side beam inner end 23B to which the fourth support device 4D is attached. The second side beam outer end 23A is disposed outward in the rail direction from the second side beam inner end 23B.

[0022] (shaft box) The first axle box 3A is supported by a first support device 4A. The second axle box 3B is supported by a second support device 4B. The third axle box 3C is supported by a third support device 4C. The fourth axle box 3D is supported by a fourth support device 4D.

[0023] The first axle box 3A and the third axle box 3C support the outer first axle 102A shown in Figure 1A. The second axle box 3B and the fourth axle box 3D support the inner second axle 102B shown in Figure 1A.

[0024] (1st support device) The first support device 4A is attached to the first side beam outer end portion 22A of the first side beam 22 and supports the first axle box 3A.

[0025] As shown in Figures 3 and 4, the first support device 4A has a first elastic body 41, a first holding member 42, an intervening member 43, a second elastic body 44, a second holding member 45, a third elastic body 46, and a lid 47.

[0026] (First elastic body) The first elastic body 41 is configured to be elastically deformable at least in the vertical direction. Specifically, the first elastic body 41 is a coil spring having a central axis parallel to the vertical direction.

[0027] The shaft portion 421 of the first retaining member 42 is axially inserted into the first elastic body 41. The first elastic body 41 bears the load of the first axle box 3A in the vertical direction. The central axis C1 of the first elastic body 41 intersects with the axis center P0 of the first axle 102A.

[0028] The upper part of the first elastic body 41 is disposed inside a cylinder (i.e., a spring cap) formed by vertical plates 223 that connect the upper beam 221 and the lower beam 222 of the first side beam 22. The lower part of the first elastic body 41 protrudes downward from the lower beam 222.

[0029] (First holding member) The first holding member 42 is supported by the first axle 102A via the first axle box 3A, and holds the first elastic body 41. The first holding member 42 has a shaft portion 421, a flange portion 422, and , has a base portion 423 , an insertion portion 424 , and a rubber seat 425 .

[0030] The shaft portion 421 is a cylindrical portion arranged so that its central axis is parallel to the vertical direction. The first elastic body 41 is wound around the outer circumferential surface of the shaft portion 421. The third elastic body 46 is also arranged inside the shaft portion 421. The central axis of the shaft portion 421 intersects with the axis center P0 of the first axle 102A.

[0031] The flange portion 422 is a disk-shaped portion connected to the upper end of the shaft portion 421. The outer diameter of the flange portion 422 is larger than the outer diameter of the shaft portion 421. The flange portion 422 holds the upper end of the first elastic body 41.

[0032] The pedestal portion 423 has a base portion 423A and a support portion 423B. The base portion 423A is a plate-shaped portion that holds the lower end portion of the first elastic body 41. The first axle box 3A is fixed to the base portion 423A from below.

[0033] Support portion 423B is a columnar portion that protrudes upward from base portion 423A. The upper end portion of support portion 423B is inserted into shaft portion 421. Support portion 423B supports third elastic body 46 inside shaft portion 421.

[0034] The base portion 423 is connected to the shaft portion 421 via the third elastic body 46 so as to be movable in the up and down direction. Therefore, when the first axle box 3A is displaced upward, the base portion 423 moves upward while compressing the first elastic body 41 from below.

[0035] The insertion portion 424 is a cylindrical or columnar portion that protrudes upward from the upper surface of the flange portion 422. The insertion portion 424 passes through the first side beam 22 in the up-down direction. Specifically, the insertion portion 424 is inserted into a through-hole provided in the upper beam 221. The outer diameter of the insertion portion 424 is smaller than the outer diameter of the shaft portion 421.

[0036] The rubber seat 425 is disposed on the upper surface of the flange portion 422. The insertion portion 424 is inserted into the center of the rubber seat 425. The rubber seat 425 is sandwiched in the vertical direction between the flange portion 422 and the upper beam 221. The rubber seat 425 is elastically deformable in the vertical direction and in the radial direction of the insertion portion 424.

[0037] (intervening member) The intervening member 43 is disposed so as to be sandwiched between the bogie frame 2 and the first holding member 42. Specifically, the intervening member 43 is a cylindrical body (i.e., a bushing) disposed between the insertion portion 424 of the first holding member 42 and the upper beam 221 of the first side beam 22.

[0038] 5, intervening member 43 covers the entire outer circumferential surface of insertion portion 424, at least the portion that is inserted into upper beam 221. Intervening member 43 is disposed in the through-hole of upper beam 221, and is sandwiched between upper beam 221 and insertion portion 424 in the radial direction of insertion portion 424. In addition, the lower end of intervening member 43 contacts the upper surface of rubber seat 425.

[0039] The intervening member 43 of the first support device 4A is made of rubber. The intervening member 43 is elastically deformable in the radial direction of the insertion portion 424. The intervening member 43 bears the load of the first axle box 3A in the rail direction and the sleeper direction.

[0040] (Second elastic body) The second elastic bodies 44 shown in FIGS. 3 and 4 are elastically deformable in the up-down direction of the bogie frame 2, the rail direction (i.e., the front-rear direction), and the sleeper direction (i.e., the left-right direction), independently of the first elastic bodies 41. It is configured to:

[0041] As shown in FIG. 6, the second elastic body 44 has a first cylindrical laminated rubber 441 , a first inner cylinder 442 , a first outer cylinder 443 , and a first housing 444 .

[0042] The first cylindrical laminated rubber 441 has a plurality of rubber plates 441A and a plurality of metal plates 441B. The plurality of rubber plates 441A and the plurality of metal plates 441B are alternately laminated in the radial direction of the cylinder. The rubber plates 441A and the metal plates 441B are curved along the circumferential direction of the first inner cylinder 442. In other words, each of the plurality of rubber plates 441A is configured in an arc shape.

[0043] The first cylindrical laminated rubber 441 has two gaps 441C formed in opposite locations in the radial direction. The gaps 441C are spaces where the rubber plate 441A and the metal plate 441B are not arranged. The gaps 441C are provided at positions opposite each other in the sleeper direction. The first cylindrical laminated rubber 441 has a symmetrical shape.

[0044] The first inner cylinder 442 is a rigid cylindrical body that is disposed radially inside the first cylindrical laminated rubber 441 and fixed to the inner circumferential surface of the first cylindrical laminated rubber 441. The second holding member 45 is inserted into the first inner cylinder 442.

[0045] The first outer cylinder 443 is a rigid cylindrical body that is disposed radially outside the first cylindrical laminated rubber 441 and fixed to the outer peripheral surface of the first cylindrical laminated rubber 441. The first housing 444 is a cylindrical body that is disposed radially outside the first outer cylinder 443 and fixed to the outer peripheral surface of the first outer cylinder 443. The first housing 444 is fixed to the support arm 31 (see FIG. 3) of the first axle box 3A.

[0046] The central axis C2 of the first cylindrical laminated rubber 441 (i.e., the central axis of the first inner cylinder 442) is parallel to the central axis C1 of the first elastic body 41. The first cylindrical laminated rubber 441 is elastically deformable in the vertical direction, the rail direction, and the sleeper direction. The second elastic body 44 mainly bears the load of the first axle box 3A in the rail direction.

[0047] (Second holding member) The second holding member 45 is supported by the bogie frame 2 and holds the second elastic body 44. Specifically, the second holding member 45 is fixed to the lower beam 222 of the first side beam 22 and the first inner cylinder 442 of the second elastic body 44.

[0048] (Third elastic body) The third elastic body 46 shown in FIGS. 3 and 4 is configured to be elastically deformable in the vertical direction, the rail direction, and the sleeper direction, independently of the first elastic body 41 and the second elastic body 44.

[0049] As shown in FIG. 7, the third elastic body 46 has a second cylindrical laminated rubber 461 , a second inner cylinder 462 , and a second outer cylinder 463 .

[0050] The second cylindrical laminated rubber 461 has a plurality of rubber plates 461A and a plurality of metal plates 461B. The configuration of the second cylindrical laminated rubber 461 is the same as that of the first cylindrical laminated rubber 441 of the second elastic body 44. However, in the second cylindrical laminated rubber 461, two gaps 461C are provided at positions facing each other in the rail direction. Therefore, the second cylindrical laminated rubber 461 has a symmetrical shape in the front-rear direction.

[0051] The second inner cylinder 462 is a rigid cylindrical body that is disposed radially inside the second cylindrical laminated rubber 461 and fixed to the inner circumferential surface of the second cylindrical laminated rubber 461. The support portion 423B of the first holding member 42 is inserted into the second inner cylinder 462.

[0052] The second outer cylinder 463 is a rigid cylindrical body that is disposed radially outside the second cylindrical laminated rubber 461 and fixed to the outer peripheral surface of the second cylindrical laminated rubber 461. The second outer cylinder 463 is fixed to the inner peripheral surface of the shaft portion 421 of the first holding member 42.

[0053] The central axis of the second cylindrical laminated rubber 461 (i.e., the central axis of the second inner cylinder 462) coincides with the central axis C1 of the first elastic body 41. The second cylindrical laminated rubber 461 is elastically deformable in the up-down direction, the rail direction, and the sleeper direction. The third elastic body 46 mainly bears the load of the first axle box 3A in the sleeper direction.

[0054] (lid) 5 is connected to the upper end of the insertion portion 424 of the first holding member 42. Specifically, the lid 47 has a claw 47A that engages with a portion of the insertion portion 424 that protrudes above the upper beam 221.

[0055] (Second support device) 2 is attached to the first side beam inner end portion 22B of the first side beam 22. The second support device 4B supports the second axle box 3B at a position offset from the first support device 4A in the rail direction of the bogie frame 2 (i.e., the front-rear direction).

[0056] The second support device 4B has the same structure as the first support device 4A. That is, the second support device 4B has a first elastic body 41, a first holding member 42, an interposing member 43, a second elastic body 44, a second holding member 45, a third elastic body 46, and a lid 47, as shown in FIGS.

[0057] However, the intervening member 43 of the second supporting device 4B is harder than the intervening member 43 of the first supporting device 4A. In other words, the spring constant (i.e., rigidity) of the intervening member 43 of the second supporting device 4B is greater than the spring constant of the intervening member 43 of the first supporting device 4A.

[0058] The intervening member 43 of the second supporting device 4B is made of, for example, rubber that is harder than the intervening member 43 of the first supporting device 4A, or a rigid material that does not elastically deform. Examples of this rigid material include insulating plastic.

[0059] Furthermore, the second elastic body 44 of the first support device 4A is softer than the second elastic body 44 of the second support device 4B. Specifically, the spring constant in the rail direction of the second elastic body 44 of the second support device 4B is greater than the spring constant in the rail direction of the second elastic body 44 of the first support device 4A.

[0060] By making the size (i.e., the circumferential length) of the gap 441C of the first cylindrical laminated rubber 441 of the second support device 4B smaller than the size of the gap 441C of the first cylindrical laminated rubber 441 of the first support device 4A, or by eliminating the gap 441C of the first cylindrical laminated rubber 441 of the second support device 4B, the second elastic body 44 of the second support device 4B can be made harder than the second elastic body 44 of the first support device 4A.

[0061] In addition, by making the hardness or thickness of the rubber plate 441A constituting the first cylindrical laminated rubber 441 of the second support device 4B greater than that of the first support device 4A, it is also possible to make the second elastic body 44 of the second support device 4B harder than the second elastic body 44 of the first support device 4A.

[0062] (Third support device and fourth support device) The third support device 4C is attached to the second side beam outer end portion 23A of the second side beam 23 and supports the third axle box 3C. The third support device 4C has the same structure as the first support device 4A, except that it is attached to the second side beam 23 instead of the first side beam 22.

[0063] The fourth support device 4D is attached to the second side beam inner end portion 23B of the second side beam 23 and supports the fourth axle box 3D. The fourth support device 4D has the same structure as the second support device 4B, except that it is attached to the second side beam 23 instead of the first side beam 22.

[0064] That is, the intervening member 43 of the fourth support device 4D is harder than the intervening member 43 of the third support device 4C. Also, the second elastic body 44 of the third support device 4C is softer than the second elastic body 44 of the fourth support device 4D.

[0065] <Second bogie> The second bogie 1B shown in Fig. 1A has a configuration that is point-symmetrical to the first bogie 1A. That is, the second bogie 1B has a bogie frame 2, a first axle box 3A, a second axle box 3B, a third axle box 3C, a fourth axle box 3D, a first support device 4A, a second support device 4B, a third support device 4C, and a fourth support device 4D, as shown in Fig. 2.

[0066] In the second bogie 1B, the first axle box 3A, the first support device 4A, the third axle box 3C and the third support device 4C are arranged outside in the rail direction (i.e., farther from the first bogie 1A, on the right side in Figure 1A) relative to the second axle box 3B, the second support device 4B, the fourth axle box 3D and the fourth support device 4D.

[0067] The first axle box 3A and the third axle box 3C of the second bogie 1B support the outer fourth axle 102D shown in Figure 1A. The second axle box 3B and the fourth axle box 3D of the second bogie 1B support the inner third axle 102C shown in Figure 1A.

[0068] <Behavior of the trolley> As shown in FIG. 1A, when railway vehicle 100 is traveling on a straight section, axles 102A-102D are each parallel to the direction of the sleepers of railway vehicle 100.

[0069] On the other hand, as shown in FIG. 1B, when railcar 100 is traveling on a curved section, axles 102A-102D are each tilted relative to the direction of the sleepers of railcar 100 so as to follow the curve.

[0070] At this time, in the first bogie 1A, the first axle box 3A supported by the first support device 4A is displaced more relative to the bogie frame 2 than the second axle box 3B supported by the second support device 4B. Similarly, the third axle box 3C supported by the third support device 4C is displaced more relative to the bogie frame 2 than the fourth axle box 3D supported by the fourth support device 4D.

[0071] As a result, the inclination angle of the second axle 102B held by the second axle box 3B and the fourth axle box 3D relative to the sleeper direction of the car body 101 becomes smaller than the inclination angle of the first axle 102A held by the first axle box 3A and the third axle box 3C.

[0072] Due to the same principle, the inclination angle of the third axle 102C held by the second axle box 3B and the fourth axle box 3D on the second bogie 1B is smaller than the inclination angle of the fourth axle 102D held by the first axle box 3A and the third axle box 3C.

[0073] That is, in the railway vehicle 100, the inclination angles of the second axle 102B and third axle 102C on the inside in the rail direction are smaller than the inclination angles of the first axle 102A and fourth axle 102D on the outside in the rail direction.

[0074] In addition, such behavior of the first bogie 1A and the second bogie 1B is such that the first bogie 1A is in the lead. This is common to both the case where the railcar 100 travels in the direction of the first bogie 1B and the case where the railcar 100 travels in the direction where the second bogie 1B is at the front.

[0075] [1-2.Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) Due to the difference in hardness of the intervening member 43, the rigidity of the first support device 4A can be made smaller than the rigidity of the second support device 4B. Therefore, by disposing the first support device 4A at the front of the rail direction of the railway vehicle 100, it is possible to improve the maneuverability in curved sections. In addition, the rigidity of the second support device 4B makes it possible to maintain running stability in straight sections.

[0076] (1b) By changing the hardness of the second elastic body 44, the rigidity of the first support device 4A can be effectively reduced while maintaining the rigidity of the second support device 4B, thereby enhancing the effect of improving steering performance in curved sections.

[0077] (1c) The first elastic body 41 elastically deforms in the vertical direction, and the second elastic body 44 elastically deforms in the rail direction, so that the intervening member 43 and the second elastic body 44 each contribute to the rigidity of the first support device 4A in the rail direction (i.e., the front-to-rear direction). This makes it easier for the first axle box 3A to rotate in the horizontal plane (i.e., around an axis parallel to the vertical direction), thereby promoting the effect of improving steering performance in curved sections.

[0078] (1d) Since the intervening member 43 is a cylindrical body arranged between the insertion portion 424 and the bogie frame 2, the transmission of vibrations from the first support device 4A and the second support device 4B to the bogie frame 2 is suppressed, while the steering performance in curved sections is improved.

[0079] 2. Other Embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take on various forms.

[0080] (2a) In the railway vehicle bogie of the above embodiment, the intervening member does not necessarily have to be disposed between the insertion portion of the first holding member and the bogie frame. Also, the intervening member does not necessarily have to be a cylindrical body.

[0081] (2b) In the railway vehicle bogie of the above embodiment, the first support device and the second support device do not necessarily have the second elastic body and the third elastic body. For example, the first support device and the second support device may be so-called wing-type support devices that have only elastic bodies that elastically deform in the up-down direction.

[0082] (2c) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, part of the configuration of the above embodiments may be omitted. Furthermore, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. All aspects included in the technical idea identified by the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0083] 1A, 1B...Bolly, 2...Bogie frame, 3A, 3B, 3C, 3D... Axle box 4A, 4B, 4C, 4D...support device, 21...cross beam, 22...first side beam, 23...second side beam, 31...support arm, 41...first elastic body, 42...first holding member, 43...intervening member, 44...second elastic body, 45...second holding member, 46...third elastic body, 47...lid, 100... railway vehicle, 101... car body, 102A, 102B, 102C, 102D... axles, 103...Wheel, 221...Upper beam, 222...Lower beam, 223...Vertical plate, 421...Shaft part, 422... flange portion, 423... base portion, 423A... base portion, 423B... support portion, 424...insertion portion, 425...rubber seat, 441, 461...cylindrical laminated rubber, 441A, 461A... rubber plates, 441C, 461C... gap portions, 442, 462... inner cylinders, 443,463...outer cylinder, 444...casing.

Claims

1. The bogie frame and a first axle box and a second axle box each holding a different axle; a first support device that supports the first axle box; a second support device that supports the second axle box at a position displaced from the first support device in the rail direction of the bogie frame; Equipped with The first support device and the second support device each include: a first elastic body configured to be elastically deformed in at least one direction of the vertical direction, the rail direction, and the sleeper direction; a holding member supported by the bogie frame and holding the first elastic body; an intervening member sandwiched between the bogie frame and the holding member, the intervening member contributing to rigidity in the rail direction; and A bogie for a railway vehicle, wherein the intervening member of the second support device is harder than the intervening member of the first support device.

2. The bogie for a railway vehicle according to claim 1, The first support device and the second support device each include: The rail structure further includes a second elastic body configured to elastically deform in at least one of the vertical direction, the rail direction, and the sleeper direction, independently of the first elastic body, The second elastic body of the first support device is softer than the second elastic body of the second support device.

3. The bogie for a railway vehicle according to claim 2, In each of the first support device and the second support device, The first elastic body is configured to be elastically deformable at least in the vertical direction, The second elastic body is configured to elastically deform at least in the rail direction.

4. A bogie for a railway vehicle according to any one of claims 1 to 3, The intervening member of the second support device is made of plastic.

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