Bogie frame component and bogie

Abstract

To provide a bogie frame component for a railway vehicle that can reduce an amount of welding on a side beam.SOLUTION: A component of a bogie frame (10) for a railway vehicle includes a side beam (11). The side beam (11) includes two side plates (111b) and a top plate (111a). The side plates (111b) face each other. The top plate (111a) connects the side plates (111b) to each other at one end in a height direction of the side plates (111b). The side beam (11) is open on the opposite side in the height direction from the top plate (111a).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a component part of a bogie frame for a railway vehicle, and a bogie using the component part. [Background technology]

[0002] A bogie for a railway vehicle includes a wheelset, which is an assembly of wheels and axles, and a bogie frame, which supports the wheelset. The bogie frame is made up of multiple components.

[0003] For example, Patent Document 1 discloses a side beam integrated with a spring cap portion as a component of a bogie frame. The side beam of Patent Document 1 includes a side beam body and a bottom plate (lower plate). The side beam body is formed, for example, by press working, so as to have an inverted U-shaped cross section. Wide portions that form the spring cap portion are provided at both longitudinal ends of the side beam body. The bottom plate is welded to the side beam so as to close the opening portion on the lower side of the side beam body.

[0004] Patent Document 2 discloses a side beam with an integral axle beam rubber support that serves as a support seat for an axle box support device. The side beam includes a side beam body (upper side beam part) and a bottom plate (lower side beam plate). The side beam body is formed to have an inverted U-shaped cross section. The bottom plate is joined to the lower end of the side beam body by welding. The axle beam rubber support is bent and formed at both ends of the bottom plate in the width direction so as to extend downward from the bottom plate. The connection part of the axle beam-type axle box support device is fastened to the axle beam rubber support with a bolt. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-42778 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-168968 Summary of the Invention [Problem to be solved by the invention]

[0006] As described in Patent Documents 1 and 2, in a typical bogie frame for a railway vehicle, the bottom plate is welded to the entire side beam body. However, the allowable stress of the weld is smaller than the allowable stress of the base material. Therefore, from the perspective of improving the reliability of the bogie frame, it is preferable to reduce the amount of welding on the side beam as much as possible.

[0007] An object of the present disclosure is to provide a component part for a bogie frame for a railway vehicle that can reduce the amount of welding on the side beams. [Means for solving the problem]

[0008] A component of a bogie frame for a railway vehicle according to the present disclosure includes a side beam. The side beam includes two side plates and a top plate. The side plates face each other. The top plate connects the side plates at one end in the height direction of the side plates. The side beam is open on the opposite side of the top plate in the height direction. [Effects of the Invention]

[0009] According to the present disclosure, the amount of welding of side beams in components of bogie frames for railway vehicles can be reduced. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a side view of a bogie for a railway vehicle according to the first embodiment. [Figure 2] FIG. 2 is a perspective view of a side beam included in the bogie shown in FIG. [Figure 3] 3 is another perspective view of the side beam included in the bogie shown in FIG. 1. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 5 is a side view of the side beam shown in FIG. [Figure 6] FIG. 6 is a perspective view showing another example of a side beam included in the bogie shown in FIG. [Figure 7]FIG. 7 is a side view of a bogie for a railway vehicle according to the second embodiment. [Figure 8] 8 is a perspective view of a bogie frame included in the bogie shown in FIG. [Figure 9] 9 is a perspective view of a side beam included in the bogie shown in FIG. [Figure 10] FIG. 10 is a side view of a bogie for a railway vehicle according to a modified example of the second embodiment. [Figure 11] 11 is a perspective view of a bogie frame included in the bogie shown in FIG. [Figure 12] FIG. 12 is a schematic view showing a cross section taken along line XII-XII in FIG. [Figure 13] FIG. 13 is a side view of a bogie for a railway vehicle according to a modified example of the first embodiment. [Figure 14] FIG. 14 is a side view of a bogie for a railway vehicle according to another modified example of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] A component part of a bogie frame for a railway vehicle according to an embodiment includes a side beam. The side beam includes two side plates and a top plate. The side plates face each other. The top plate connects the side plates at one end in the height direction of the side plates. The side beam is open on the opposite side of the top plate in the height direction (first configuration).

[0012] A typical side beam is largely composed of two side plates and a top plate (the side beam main body). Therefore, the bottom plate is welded to the entire side beam main body, which increases the amount of welding required for the side beam. In contrast, in the bogie frame component according to the first configuration, the side beams are configured such that the side plates are connected to each other at one end in the height direction of the side plates by the top plate, while the other end in the height direction of the side plates, i.e., the side opposite the top plate, is open. In other words, the side beam main body is not sealed by the bottom plate as in conventional configurations, and the side beam does not have a weld for joining the bottom plate to the side beam main body. Therefore, the component according to the first configuration can reduce the amount of welding required for the side beam.

[0013] In the component according to the first configuration, the side beam may further include a flange. The flange is provided at the end of the side beam opposite the top plate and can protrude in the width direction of the side beam (second configuration).

[0014] In the bogie frame component according to the second configuration, a flange protruding in the width direction of the side beam is provided at the open end of the side beam, i.e., the end opposite the top plate, thereby improving the strength of the side beam.

[0015] In the component according to the first or second configuration, the side beam may further include a receiving seat for the axle box support device. The receiving seat may be formed on each of the side plates at the other end side in the height direction of the side plate (third configuration).

[0016] The component according to the first or second configuration may further comprise a cross beam and a bearing seat for the axle box support. The cross beam may pass through the side plate. The bearing seat may be attached to the cross beam (fourth configuration).

[0017] For example, as described in Patent Document 2, other components, such as a screw seat for bolt fastening, may be attached to the axle box support seat. When other components are attached to the axle box support seat, welding may be required depending on the size of the components. In contrast, in the bogie frame component according to the fourth configuration, the axle box support seat is attached to the cross beam. Therefore, there is no need to weld the seat itself to the side beam, which further reduces the amount of welding on the side beam. Furthermore, even when components such as a screw seat are attached to the axle box support seat, no welding is required for the side beam. The side beam can be manufactured essentially by press working alone. Therefore, the side beam can be easily handled as an easily manufactured replacement part.

[0018] In the component according to the fourth configuration, the support seat may be attached to the cross beam outside the side beam (fifth configuration).

[0019] In the component according to the fourth configuration, the support seat may be attached to the cross beam inside the side beam (sixth configuration).

[0020] A bogie for a railway vehicle according to an embodiment includes a bogie frame and front and rear wheel sets. The bogie frame may include components according to any one of the first to sixth configurations. The wheel sets are supported by the bogie frame. Each wheel set includes a pair of wheels and an axle. The wheels are attached to the axle (seventh configuration).

[0021] The bogie according to the seventh configuration may further include front and rear axle boxes and a connecting part. The axle boxes are provided corresponding to the respective wheel sets. The connecting part can connect the axle boxes to each other. At least a part of the connecting part may be disposed below the top plate so as to face the top plate (eighth configuration).

[0022] In a bogie for a railway vehicle, the side beams of the bogie frame elastically support the axle boxes in the vertical direction. Therefore, when the bogie is loaded with the mass of passengers in addition to the mass of the carbody, the axle springs deflect, causing the side beams to move downward and approach the axle boxes. To avoid interference with the bottom plates of the side beams, the connecting parts connecting the front and rear axle boxes are generally positioned with a lateral offset from the side beams. In contrast, in the bogie according to the eighth configuration, the side beams of the bogie frame are open on the opposite side of the top plate. This allows the space within or directly below the side beams to be used as a placement space for the connecting parts. The connecting parts connecting the axle boxes are positioned below the top plate of the side beam so that at least a portion of them faces the top plate of the side beam without being lateral offset from the side beams. Because a relatively large space is formed within the side beams, interference between the connecting parts and the side beams can be avoided even if the side beams move downward. Therefore, the connecting parts can be freely arranged, for example, within the side beam or immediately below the side beam.

[0023] The bogie according to the seventh or eighth configuration may further include a linear component. The linear component may extend in the front-to-rear direction of the bogie. At least a portion of the linear component may be housed inside the side beam (ninth configuration).

[0024] In bogies for railway vehicles, various components such as air springs are generally attached to the bogie frame. Therefore, it is difficult to arrange linear components extending in the fore-and-aft direction of the bogie on the bogie frame. In contrast, in the bogie according to the embodiment, the side beams of the bogie frame are open on the opposite side of the top plate. Therefore, as in the ninth configuration, linear components can be accommodated inside the side beams. In other words, the space inside the side beams can be used as an arrangement space for linear components.

[0025] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same or equivalent components are designated by the same reference numerals, and the same description will not be repeated.

[0026] First Embodiment 1 is a side view showing a schematic configuration of a bogie 100 according to this embodiment. The bogie 100 is used in a railway vehicle. Referring to FIG. 1, the bogie 100 includes a bogie frame 10, wheel sets 20F, 20R, axle boxes 30F, 30R, and a connecting component 40.

[0027] The bogie frame 10 is a main structural frame that constitutes the bogie 100. The bogie frame 10 includes, as structural parts thereof, a pair of side beams 11 and at least one cross beam 12. The side beams 11 are arranged side by side in the left-right direction (width direction) of the bogie 100. The side beams 11 are connected by the cross beams 12.

[0028] The wheel sets 20F, 20R are arranged in the front-to-rear direction (longitudinal direction) of the bogie 100. The wheel sets 20F, 20R are supported by the bogie frame 10. Each of the wheel sets 20F, 20R includes a pair of wheels 21 and an axle 22. The axle 22 extends in the left-to-right direction of the bogie 100. The wheels 21 are arranged on both sides of the axle 22 and attached to the axle 22.

[0029] The axle boxes 30F, 30R are provided corresponding to the wheel sets 20F, 20R, respectively. The axle boxes 30F, 30R house bearings that support the axles 22 of the corresponding wheel sets 20F, 20R. In the example of Fig. 1, the axle boxes 30F, 30R are arranged outward in the left-right direction of the bogie 100 relative to the wheels 21 of the corresponding wheel sets 20F, 20R.

[0030] The axle boxes 30F, 30R are supported on the bogie frame 10 via axle box suspensions 50F, 50R, respectively. The axle boxes 30F, 30R are elastically connected in the vertical direction to the side beams 11 of the bogie frame 10 by the axle box suspensions 50F, 50R. The axle box suspensions 50F, 50R are preferably of the crown spring type. A crown spring type axle box suspension is a type of axle box suspension in which axle springs are arranged above the axle boxes 30F, 30R.

[0031] The connecting part 40 connects the front and rear axle boxes 30F, 30R. The connecting part 40 is connected to each axle box body of the axle boxes 30F, 30R. In the example of Fig. 1, the connecting part 40 is an oiling device.

[0032] The configuration of the side beam 11, which is a component of the bogie frame 10, will be described in detail below with reference to Figures 2 and 3. Figure 2 is a perspective view showing the schematic configuration of the side beam 11. Figure 3 is a perspective view of the side beam 11 viewed from a different angle than that of Figure 2. As shown in Figures 2 and 3, the side beam 11 includes a side beam main body 111, a receiving seat 112 for the axle box suspension devices 50F, 50R (Figure 1), and a flange 113.

[0033] 2, the side beam main body 111 has an elongated shape. When the side beam 11 is assembled into the bogie 100 (FIG. 1), the side beam main body 111 extends in the front-rear direction of the bogie 100.

[0034] The side beam body 111 includes a top plate 111a and two side plates 111b. The top plate 111a and the side plates 111b each extend in the longitudinal direction of the side beam body 111. The side plates 111b are arranged on both sides of the top plate 111a in the width direction of the side beam body 111. The width direction refers to the direction perpendicular to the longitudinal direction of the side beam body 111 when viewing the side beam body 111 from the top plate 111a side. The direction perpendicular to the longitudinal and width directions of the side beam body 111 is the height direction.

[0035] The top plate 111a connects the side plates 111b to each other at one end in the height direction of the side plates 111b. A receiving seat 112 is formed on each side plate 111b at the other end in the height direction of the side plate 111b. In this embodiment, each side plate 111b is provided with a receiving seat 112 for the axle box support devices 50F, 50R (FIG. 1) in regions on one and the other sides in the longitudinal direction. A screw seat 114 is attached to each receiving seat 112. The screw seat 114 is attached to the receiving seat 112, for example, so as to sandwich the receiving seat 112 from both sides in the plate thickness direction.

[0036] 1, a link 60 connected to the axle box support device 50F or 50R is attached to each of the screw seats 114 using a fastening member such as a bolt. The link 60 is fastened to the screw seats 114 on both sides in the width direction of the side beam 11 via a rod-shaped member (not shown) inserted through the link 60.

[0037] Returning to FIG. 2, the side beam body 111 includes integral spring cap portions 111c. The spring cap portions 111c are arranged at both longitudinal ends of the side beam body 111. Each of the spring cap portions 111c has a wider shape compared to the other portions of the side beam body 111. When viewed from above the side beam body 111, each spring cap portion 111c may have a substantially circular shape as shown in the example in FIG. 2, or may have other shapes such as a substantially rectangular shape or a substantially trapezoidal shape.

[0038] 3, the flange 113 is provided at the end of the side beam 11 opposite the top plate 111a and protrudes in the width direction. In this embodiment, the flange 113 is provided integrally with the end (tip) of each side plate 111b opposite the top plate 111a and / or the free end of each receiving seat 112. The flange 113 bends inward in the width direction of the side beam main body 111 from the tip of each side plate 111b and / or the end of each receiving seat 112. However, the flange 113 may also be bent outward in the width direction of the side beam main body 111 from the tip of each side plate 111b and / or the end of each receiving seat 112. In other words, the flange 113 may protrude inward in the width direction or outward in the width direction from the end of the side beam 11 opposite the top plate 111a.

[0039] Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 2. Fig. 4 shows a cross section (transverse section) of the side beam 11 cut perpendicularly to the longitudinal direction.

[0040] Referring to Figure 4, the side beam body 111 has an inverted U-shape in cross section. That is, in the cross section of the side beam body 111, one end side in the height direction of the two side plates 111b is closed by the top plate 111a, while the other end side in the height direction of the two side plates 111b is open. That is, the side beam body 111 has an opening on the opposite side of the top plate 111a in the height direction. The end (tip) of each side plate 111b opposite the top plate 111a is an open end. The side beam body 111 has an open cross section over its entire length in the longitudinal direction.

[0041] In the side beam main body 111, an internal space S is defined by the top plate 111a and the two side plates 111b. At least a portion of the connecting part 40 (FIG. 1) is disposed inside or immediately below the internal space S. Specifically, the connecting part 40 is disposed below the top plate 111a of the side beam main body 111 so that at least a portion of the connecting part 40 faces the top plate 111a. For example, when the railway vehicle is empty, the connecting part 40, which is an oiling device, extends in the longitudinal direction of the bogie 100, inside the two side plates 111b in the width direction of the side beam 11 and below the side plates 111b. In other words, a portion of the connecting part 40 is disposed substantially directly below the internal space S. When the side beam 11 moves downward as the occupancy rate of the railway vehicle increases, the connecting part 40 relatively enters the internal space S of the side beam 11. As shown in FIG. 1, at least when the railway car is fully loaded, a portion of the connecting part 40 is disposed within the internal space S of the side beam 11.

[0042] Fig. 5 is a side view of the side beam 11. Referring to Fig. 5, the side plate 111b of the side beam main body 111 is arranged so that the longitudinal center portion is shifted in the height direction relative to the portions on both sides in the longitudinal direction. On the paper surface of Fig. 5, the longitudinal center portion of the side plate 111b is arranged lower than the portions on both sides in the longitudinal direction. Therefore, the edge 115 of the side beam main body 111 opposite the top plate 111a in a side view of the side beam 11 includes, for example, a central portion 115a, a side portion 115b, and a transition portion 115c.

[0043] The side portions 115b are arranged on both sides of the central portion 115a in the longitudinal direction of the side beam body 111. Each of the side portions 115b is connected to the central portion 115a via a transition portion 115c. In a side view of the side beam 11, the central portion 115a and the side portions 115b have, for example, a linear shape extending in the longitudinal direction of the side beam body 111.

[0044] In a side view of the side beam 11, the portion 115d of the transition portion 115c adjacent to the side portion 115b has a concave curved shape toward the inside of the side plate 111b. The portion 115d adjacent to the side portion 115b smoothly continues to the side portion 115b. The portion 115e of the transition portion 115c, which is located closer to the center portion 115a than the portion 115d adjacent to the side portion 115b, is the free end of the receiving seat 112 for the axle box support device 50F, 50R (FIG. 1). The radius of curvature of the transition portion 115c usually changes at the boundary between the portions 115d and 115e. In the side beam 11, the portion located outside the tangent line (double-dashed line) of the transition portion 115c at the boundary between the portions 115d and 115e becomes the receiving seat 112.

[0045] Each of the receiving seats 112 is formed on the side plate 111b. Preferably, each of the receiving seats 112 is formed integrally with the side plate 111b. The side plate 111b is formed integrally with the top plate 111a. The side plate 111b is also formed integrally with the flange 113 (FIG. 3). "Integratedly formed" means that the components are integrated from the material stage, and does not mean that separate components are joined to form a single part after molding such as press working.

[0046] In this embodiment, the side beam 11, including the top plate 111a, the side plate 111b, and the flange 113, can be fabricated by, for example, pressing a single sheet of metal material. Typically, there are no joints, such as welds, between the top plate 111a, the side plate 111b, and the flange 113. It is preferable that the receiving seat 112 be integrally formed with the side plate 111b of the side beam main body 111 from the material stage, for example, by welding or forging. In this case, the side beam 11, including the top plate 111a, the side plate 111b, the flange 113, and the receiving seat 112, can be fabricated by pressing. It is preferable that there are no joints, such as welds, between the receiving seat 112 and the side plate 111b. That is, it is preferable that the receiving seat 112 be provided continuously with the side plate 111b without welding.

[0047] The top plate 111a, side plate 111b, flange 113, and receiving seat 112 of the side beam main body 111 are made of, for example, steel. If the top plate 111a, side plate 111b, flange 113, and receiving seat 112 are not joined by welding, higher strength steel can be used compared to when welding is required. Examples of high strength steel include high tensile steel (high tensile steel), stainless steel (SUS), and spring steel.

[0048] The thicknesses of the top plate 111a, side plate 111b, flange 113, and receiving seat 112 of the side beam body 111 may be the same or may vary depending on the location. For example, the thickness of the receiving seat 112 may be greater than the thicknesses of the other locations.

[0049] [effect] The side beams 11 according to this embodiment have an inverted U-shape in cross section and are open on the side opposite the top plate 111a. That is, unlike conventional side beams, the side beams 11 do not have a bottom plate and do not have welds for joining the bottom plate. Therefore, the amount of welding required for the side beams 11 can be reduced.

[0050] In the side beam 11 according to this embodiment, the receiving seats 112 for the axle box supports 50F, 50R are preferably formed integrally with each of the side plates 111b of the side beam main body 111. In other words, it is preferable that the side beam main body 111 and the receiving seats 112 are a single component that is integrated from the stage of the material to be subjected to press working or the like, and are not joined after each is formed. It is more preferable that the receiving seats 112 are attached to the side beam main body 111 without welding. In this case, the amount of welding of the side beam 11 can be further reduced.

[0051] In the side beam 11 according to this embodiment, a flange 113 is provided at the end opposite the top plate 111a. The flange 113 is provided at the edge 115 of the side beam main body 111 opposite the top plate 111a in a side view of the side beam 11. This flange 113 can improve the strength of the side beam 11. The flange 113 is preferably provided at the transition portion 115c of the edge 115 of the side beam main body 111. Particularly high stress occurs at the transition portion 115c, so providing the flange 113 at the transition portion 115c can effectively increase the strength of the side beam 11.

[0052] In the side beam 11 according to this embodiment, the flange 113 provided on each transition portion 115c may have the same shape as or a different shape from the flanges provided on the other transition portions 115c. Furthermore, it is sufficient that the flange 113 is provided on at least one of the transition portions 115c. However, as shown in FIG. 6, the flange 113 does not necessarily have to be provided on the side beam 11.

[0053] In the bogie 100 according to this embodiment, an internal space S is formed within the side beam 11. The internal space S is open on the side opposite the top plate 111a, i.e., on the underside of the side beam 11. Therefore, the connecting part 40 that connects the axle boxes 30F, 30R can be disposed below the top plate 111a so that at least a portion of the connecting part 40 faces the top plate 111a. Because the internal space S is a relatively large space provided within the side beam 11, even if the side beam 11 moves downward due to the weight of passengers or the like, the side beam 11 is unlikely to come into contact with the connecting part 40. Therefore, the connecting part 40 can be freely disposed, for example, within the side beam 11 or directly below the side beam 11, while avoiding interference between the connecting part 40 and the side beam 11.

[0054] In this embodiment, the connecting part 40 is an oiling device. The oiling device is a device that applies oil to the rails on which the railway vehicle runs. In conventional bogies, the underside of the side beams is sealed off by a bottom plate, so the oiling device is arranged on the outside of the side beams in the left-right direction of the bogie. On the other hand, in this embodiment, the oiling device, which is the connecting part 40, is arranged below the top plate 111a of the side beam 11 so as to face the top plate 111a, so that the oiling device can be brought closer to the rails in the track width direction.

[0055] Second Embodiment Fig. 7 is a side view showing a schematic configuration of a bogie 100A for a railway vehicle according to this embodiment. The bogie 100A has basically the same configuration as the bogie 100 according to the first embodiment, but differs from the first embodiment in the configuration of the bogie frame 10A. Fig. 8 is a perspective view showing the components of the bogie frame 10A. With reference to Figs. 7 and 8, the bogie frame 10A includes, as its components, a pair of side beams 11A, at least one cross beam 12, and bearing seats 13 for the axle box suspensions 50F, 50R.

[0056] FIG. 9 is a perspective view of the side beam 11A. Referring to FIGS. 8 and 9, the side beam 11A includes a side beam main body 111. The side beam main body 111 includes a top plate 111a and a side plate 111b similar to those in the first embodiment. However, in the side beam 11A, the side beam main body 111 is not provided with a receiving seat 13 for the axle box support device 50F, 50R (FIG. 7). Although not shown, in this embodiment, each side plate 111b of the side beam main body 111 may also be integrally provided with a flange 113 (FIG. 3) at the end opposite the top plate 111a. As in the first embodiment, the flange 113 is preferably provided at the transition portion 115c of the edge 115 of the side beam main body 111 in a side view.

[0057] Referring to Fig. 8, the cross beam 12 extends in the left-right direction of the carriage 100A (Fig. 7). The cross beam 12 penetrates the side plates 111b of the side beams 11A. More specifically, the cross beam 12 is inserted into through holes 116 provided in each side plate 111b. The cross beam 12 is preferably attached to each side beam 11A in a detachable manner.

[0058] Each of the side beams 11A is made of metal, as in the first embodiment. The side beams 11A may be made of steel. The side beams 11A are preferably made of high-strength steel, such as stainless steel (SUS), spring steel, or high-tensile steel (HTSS). The cross beams 12 may be made of the same material as the side beams 11A, or may be made of a different material.

[0059] Returning to FIG. 7, the bearing seats 13 for the axle box supports 50F, 50R are attached to the cross beam 12. More specifically, the bearing seats 13 are attached to both longitudinal ends of the cross beam 12. In the example of FIG. 7, the bearing seats 13 are attached to the cross beam 12 outside the side beam 11A. That is, the bearing seats 13 are attached to the cross beam 12 outside the side beam 11A in the left-right direction of the bogie 100A. The bearing seats 13 are fixed to the cross beam 12 in a detachable manner. The bearing seats 13 may be fixed to the cross beam 12 by fastening members 14 such as bolts.

[0060] The front and rear axle box support devices 50F, 50R are connected to the receiving seat 13 via a link 60. In this embodiment, a common receiving seat 13 is provided for the axle box support devices 50F, 50R. However, a receiving seat 13 may be provided for each axle box support device 50F, 50R.

[0061] In this embodiment, as in the first embodiment, the side beam 11A is open on the side opposite the top plate 111a. That is, the side beam 11A does not have a bottom plate like conventional side beams, and does not have a welded portion for joining the bottom plate. Therefore, the side beam 11A according to this embodiment can also reduce the amount of welding.

[0062] When the side beams 11 are provided with the receiving seats 112 for the axle box supports 50F, 50R as in the first embodiment, each receiving seat 112 is typically provided with a screw seat 114 for bolt fastening. When other components, such as the screw seat 114, are attached to the receiving seats 112, welding may be required on the side beam 11 depending on the size of the components. In contrast, in this embodiment, the receiving seats 13 for the axle box supports 50F, 50R are attached to the cross beam 12. Therefore, the receiving seats 13 themselves do not need to be welded to the side beam 11A, further reducing the amount of welding required for the side beam 11A. Furthermore, even when other components, such as the screw seat 114, are attached to the receiving seats 13 for the axle box supports 50F, 50R, no welding is required for the side beam 11A. The side beams 11A can be formed from a single sheet of metal material and can be manufactured essentially by press working alone. This makes the side beams 11A easy to handle as replacement parts that are easy to manufacture.

[0063] In the example of Fig. 7, the support seat 13 is attached to the cross beam 12 outside the side beam 11A. However, as shown in Figs. 10 and 11, the support seat 13 may be attached to the cross beam 12 inside the side beam 11A. That is, the support seat 13 may be attached to the cross beam 12 inside the side beam 11A in the left-right direction of the bogie 100A. In this case, the support seat 13 is disposed between the two side plates 111b of the side beam 11A.

[0064] Figure 12 is a schematic diagram showing the XII-XII cross section of Figure 11. As shown in Figure 12, the bearing seat 13 is attached to the underside of the cross beam 12 by fastening members 14 such as bolts. The bearing seat 13 is fastened to the cross beam 12 by the fastening members 14 on both sides of a link 60 connected to, for example, the axle box suspension 50F or 50R (Figure 10). The link 60 is disposed in a recess 131 formed in the underside of the bearing seat 13. The link 60 is attached to the bearing seat 13 via a rod-shaped member 15. More specifically, the link 60 is inserted through the rod-shaped member 15, and both ends of the rod-shaped member 15 are attached to the end faces of the bearing seat 13.

[0065] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present disclosure.

[0066] In the bogies 100, 100A according to the above embodiments, an oiling device is provided as the connecting part 40 that connects the axle boxes 30F, 30R. However, the connecting part 40 does not have to be an oiling device. For example, as shown in FIG. 13, when the bogie 100 according to the first embodiment is a steering bogie, the connecting part 40 that connects the axle boxes 30F, 30R may be a steering device. Similarly, in the bogie 100A according to the second embodiment, the connecting part 40 that connects the axle boxes 30F, 30R may be a steering device. In this case, the bogies 100, 100A do not have to include the receiving seats 112, 13 (FIGS. 1 and 7) for the axle box supports 50F, 50R. The steering device as the connecting part 40 is disposed below the top plate 111a of the side beams 11, 11A so that at least a portion of the steering device faces the top plate 111a. Although not shown, the connecting part 40 connecting the axle boxes 30F, 30R may be an equalizer, and at least a part of the equalizer may be disposed below the top plate 111a of the side beams 11, 11A so as to face the top plate 111a.

[0067] The bogies 100, 100A according to the above embodiments may be equipped with linear components (not shown). The linear components are components that extend in the front-to-rear direction of the bogies 100, 100A, such as various wiring or piping. At least a portion of the linear components may be housed inside the side beams 11, 11A. In other words, it is preferable that the internal space S of the side beams 11, 11A is also used as a space for arranging the linear components.

[0068] In the bogies 100, 100A according to the above embodiments, the axle boxes 30F, 30R are arranged on the outer sides of the wheels 21 in the width direction of the bogies 100, 100A. That is, the axle boxes 30F, 30R are outer axle boxes. However, the axle boxes 30F, 30R may also be inner axle boxes. That is, the axle boxes 30F, 30R may also be arranged on the inner sides of the wheels 21 in the width direction of the bogies 100, 100A. In this case, the connecting piece 40 connects the front and rear axle boxes 30F, 30R on the inner sides of the wheels 21 in the width direction of the bogies 100, 100A.

[0069] The bogies 100, 100A according to the above embodiments may not be provided with the connecting part 40. For example, as shown in Fig. 14, the bogie 100A according to the second embodiment may not be provided with an oil application device as the connecting part 40. Although not shown in the figures, similarly, the bogie 100 according to the first embodiment may not be provided with an oil application device as the connecting part 40. [Explanation of symbols]

[0070] 100, 100A: Cart 10, 10A: Bogie frame 11, 11A: Side beam 111a: Top plate 111b: Side plate 112: Receptacle 113: Flange 12: Horizontal 13: Receptacle 20F,20R:wheel axle 21:Wheel 22: Axle 30F,30R: Axle box 40: Connecting parts 50F,50R: Axle box support device

Claims

1. A component of a bogie frame for a railway vehicle, The device comprises a side beam including two side plates facing each other and a top plate connecting the side plates at one end side in the height direction of the side plates, A component in which the side beam is open on the opposite side of the top plate in the height direction.

2. 10. The component of claim 1, The side beam further includes a flange provided at an end opposite the top plate and protruding in the width direction of the side beam.

3. 10. The component of claim 1, The side beams further include a receiving seat for an axle box support device formed on each of the side plates at the other end side of the side plate in the height direction.

4. 10. The component of claim 1, further comprising: a cross beam penetrating the side panel; a bearing seat for an axle box support device attached to the cross beam; A component comprising:

5. Component according to claim 4, A component in which the support seat is attached to the cross beam outside the side beam.

6. Component according to claim 4, A component in which the support seat is attached to the cross beam inside the side beam.

7. A bogie for a railway vehicle, a bogie frame including a component according to any one of claims 1 to 6; front and rear wheel sets each including a pair of wheels and an axle to which the wheels are attached, and supported by the bogie frame; A trolley equipped with:

8. The bogie according to claim 7, further comprising: front and rear axle boxes provided corresponding to each of the wheel sets; a connecting component that is disposed below the top plate so that at least a portion of the connecting component faces the top plate and connects the axle boxes to each other; A trolley equipped with:

9. The bogie according to claim 7, further comprising: A bogie comprising a linear part at least a portion of which is housed inside the side beam and extends in the fore-and-aft direction of the bogie.

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