Covering structure of bogie, bogie assembly and railway vehicle

Abstract

The covering structure (100) for a bogie (200) includes a bottom plate (1) covering the bottom of the bogie (200), and the bottom plate (1) has openings (1a) for allowing the wheels (23) of the railway vehicle to escape. A bogie bogie assembly and a railway vehicle are also disclosed. The covering structure (100) covers the bottom of the bogie (200), and when air flows under the bottom of the bogie (200), it flows directly through the bottom surface of the bottom plate (1), thereby reducing air resistance in the bogie (200) area. The openings (1a) occupy a small space, reducing the impact of resistance caused by air entering the bogie (200) through the openings (1a), and not affecting the effect of the covering structure (100) in reducing running resistance.

Description

[Technical Field]

[0001] This application claims priority from the following three Chinese patent applications, the entire contents of which are incorporated herein by reference: 1. Filed with the China Patent Office on June 30, 2023, application number 202310796439.9, invention name "Bogie bogie covering device, bogie bogie and railway vehicle"; 2. The application number is 202310796806.5, filed with the China Patent Office on June 30, 2023, and the invention title is "Covering structure, bogie carriage assembly and railway vehicle"; 3. The application number is 202321707911.9, filed with the China Patent Office on June 30, 2023, and the invention title is "Bogie bogie device and railway vehicle."

[0002] The present invention relates to the technical field of railway vehicles, and more particularly to a covering structure for a bogie, a bogie assembly and a railway vehicle. [Background technology]

[0003] High-speed rail vehicles include bogies installed under the vehicle body, and the bogies have a complex structure, including a frame to which wheels and brake discs are attached, as well as a number of other components such as suspensions, yaw dampers, anti-roll bars, etc. When air flows through the bogie area during travel, it experiences significant air resistance, which affects the energy consumption of the vehicle during travel. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application provides a covering structure, which includes a bottom plate covering the bottom of the bogie truck, and the bottom plate has openings for allowing the wheels of the railway vehicle to escape. [Means for solving the problem]

[0005] In a specific embodiment, the opening is a notch provided at the end of the bottom plate, and / or the edge of the opening is provided with a protective plate extending upward.

[0006] In a specific embodiment, the bottom plate is provided with a recess for accommodating the brake disc of the bogie truck, the wall of the recess protrudes downward relative to the bottom surface of the bottom plate, and the outer surface of the recess is streamlined.

[0007] In a specific embodiment, the outer surface of the recess is spindle-shaped or tear-shaped.

[0008] In a specific embodiment, both edges of the bottom plate extend upward to form side flanges, and / or both edges of the end of the bottom plate extend upward to form end flanges.

[0009] In a specific embodiment, the vehicle further includes an attachment arm, the attachment arm including a first connection base connected to the bottom plate and a second connection base connected to an end of the side beam of the bogie.

[0010] In a specific embodiment, the mounting arm is provided with a sand scattering device and / or an obstacle deflector.

[0011] In a specific embodiment, the mounting arm is provided at the position of the opening, a side flange is provided on the side edge of the opening extending upward, and the first connecting base includes a U-shaped plate that is engaged with and fixed to the side flange.

[0012] In a specific embodiment, the covering structure further includes a support framework fixed to the bottom plate and connected to a frame of the bogie.

[0013] The present application further provides a bogie assembly, comprising a bogie and a covering structure covering the bottom of the bogie, the covering structure being the covering structure for the bogie described in any one of the above claims.

[0014] The present application further provides a railway vehicle, including the bogie truck assembly according to any one of the preceding claims.

[0015] The covering structure in this application covers the bottom of the bogie, so that when air flows under the bottom of the bogie, it does not enter the complex parts inside the bogie but flows directly through the bottom surface of the bottom plate, reducing the air resistance in the bogie area and energy consumption during vehicle operation. In addition, the bottom plate is provided with openings for wheel relief, and since the covering structure is fixed to the frame of the bogie and its relative movement with the wheels is small, the openings occupy a small space as a wheel relief position, reducing the impact of resistance caused by air entering the bogie through the openings, without affecting the effect of reducing running resistance achieved by the covering structure.

[0016] The present application further provides a covering structure for a bogie truck, which is used to cover the bottom of a bogie truck, and the bogie truck is provided with a frame body and an axle brake disc, and the covering structure for the bogie truck comprises: a mounting cross beam fixedly connected to the frame body of the bogie; and at least two mounting plates fixedly arranged on the mounting cross beam, at least one of the mounting plates being fixedly connected to the frame body of the bogie truck, at least one of the mounting plates being provided with a storage section for accommodating the axle brake disc, and at least two mounting plates being arranged so that the bottom of the storage section protrudes beyond the outer surface of the mounting plate.

[0017] Preferably, the portion of the receiving portion that protrudes from the outer surface of the mounting plate is spindle-shaped.

[0018] Preferably, at least one of the mounting plates is removably attached to the mounting cross beam by a tenon arrangement.

[0019] Preferably, the mounting cross beam includes two first mounting cross beams and a second mounting cross beam arranged in parallel, the first mounting cross beam and the second mounting cross beam both being arranged perpendicular to the traveling direction of the bogie truck, the mounting plate includes two side plates, two end plates, and an inspection cover, the two side plates are respectively provided at both ends in the longitudinal direction of the first mounting cross beam and the second mounting cross beam, the two end plates are respectively provided at the front end of the first mounting cross beam and the rear end of the second mounting cross beam, and the inspection cover is provided between the front end of the first mounting cross beam and the second mounting cross beam, The storage portion is provided in the end plate.

[0020] Preferably, one of the inspection cover and the first mounting cross beam is provided with a first protrusion, and the other is provided with a first recess that engages with the first protrusion, and the first protrusion is inserted into the first recess, At least one of the inspection cover and the second mounting cross beam is provided with a locking mechanism that locks or unlocks the inspection cover.

[0021] Preferably, the locking mechanism includes a deadbolt provided on the inspection cover so as to extend movably between a first position and a second position, and the second mounting cross beam is provided with a locking protrusion and an unlocking groove, so that when the deadbolt moves to the first position, it engages with the locking protrusion to lock the inspection cover closed, and when the deadbolt moves to the second position, it engages with the unlocking groove to unlock the inspection cover open.

[0022] Preferably, relief holes for extending the wheels are formed on both sides of the end plate and between the two side plates, and fenders are provided on at least one of the end plate and the adjacent side plate, the fenders being positioned circumferentially outside the wheels and gradually inclining from the bottom up in a direction approaching the wheels.

[0023] Preferably, the mounting plate and the mounting cross beam are combined into a hull-shaped structure, and the hull-shaped structure has a flat surface at its middle position along the direction of travel and both ends are inclined surfaces that are inclined upward.

[0024] A bogie truck includes a frame body, a wheel attached to the frame body, an axle brake disc, and the covering structure for the bogie truck described in any one of the above.

[0025] A railway vehicle including the bogie described above. [Effects of the Invention]

[0026] In the process of using the covering structure for the bogie provided by the present application, first, the mounting cross beam and the mounting plate are assembled, and then the assembled covering structure for the bogie is attached to the bogie, or the mounting cross beam and the mounting plate are directly attached to the bogie, and at least one mounting plate is provided with a receiving portion for receiving the axle brake disc, so that the large-sized axle brake disc can be received in the receiving portion, and the influence of the large-sized axle brake disc on the mounting height of the mounting plate is avoided, and the covering structure for the bogie is used for the bogie having the large-sized axle brake disc. - It can be applied to bogies, and during the travel process, the mounting cross beam and mounting plate are connected to the frame body, which reduces the relative movement with the wheels and reduces the gap between the wheels and the relief holes in the covering plate, and prevents airflow from entering the bogie bogie device through the relief holes and generating air resistance. Most of the airflow flows from the outside of the covering structure of the bogie bogie along the bottom surface of the covering structure of the bogie bogie, and the airflow does not flow directly through the complex parts within the covering structure of the bogie bogie, effectively reducing air resistance and further reducing energy consumption. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 2 is a schematic diagram showing the covering structure covering the bottom of the bogie truck in the first embodiment of the present application. [Figure 2] FIG. 2 is a schematic diagram of another viewing angle of FIG. [Figure 3] FIG. 2 is a schematic diagram of the coating structure of FIG. 1. [Figure 4] 4 is a schematic diagram of another viewing angle of FIG. 3. FIG. [Figure 5]FIG. 2 is a schematic diagram of the mounting arm of FIG. 1. [Figure 6] FIG. 4 is a schematic diagram of the supporting framework of FIG. 3. [Figure 7] FIG. 2 is a structural schematic diagram of a covering structure for a bogie truck according to a second embodiment of the present application. [Figure 8] FIG. 8 is an exploded schematic view of the covering structure of the bogie truck of FIG. 7. [Figure 9] This is a schematic diagram of the end plate and inspection cover being attached to the first mounting cross beam. [Figure 10] FIG. 10 is a schematic view showing an end plate attached to a first attachment cross beam. [Figure 11] This is a schematic diagram of an inspection cover being attached to a second mounting cross beam. [Figure 12] FIG. 12 is a locally enlarged view of part A in FIG. [Figure 13] FIG. 1 is a schematic diagram of the structure of an inspection cover. [Figure 14] 1 is a structural schematic diagram of a specific embodiment of the bogie truck provided by the present invention; FIG. [Figure 15] FIG. 15 is a bottom view of the bogie of FIG. 14. [Figure 16] 1 is a cross-sectional schematic diagram of a railway vehicle provided by the present application. [Figure 17] FIG. 2 is a structural schematic diagram of a bogie truck provided in a second embodiment of the present application after removing the end plate. [Figure 18] FIG. 10 is a structural schematic diagram of the bogie truck provided in the second embodiment of the present application after the inspection cover has been removed. [Figure 19] FIG. 10 is a schematic diagram illustrating the connection between the second mounting cross beam and the end plate in the bogie truck provided by the second embodiment of the present application. [Figure 20] FIG. 2 is a schematic diagram of a portion of the structure of a bogie covering device provided by the second embodiment of the present application; [Figure 21] FIG. 21 is a cross-sectional schematic view taken along the line BB in FIG. 20. [Figure 22] FIG. 21 is a cross-sectional schematic view taken along the AA direction in FIG. 20. [Figure 23] FIG. 10 is a schematic diagram showing the mounting position of the metal plate of the end plate. [Figure 24]FIG. 10 is a structural schematic diagram of a bogie truck assembly according to a third embodiment of the present application. [Figure 25] FIG. 25 is a bottom view of the bogie assembly of FIG. 24. [Figure 26] FIG. 10 is a structural schematic diagram of a bogie truck assembly according to a fourth embodiment of the present application. [Figure 27] FIG. 10 is a structural schematic diagram of the mounting arm and the frame body of the mounting base attached to each other. [Figure 28] FIG. 2 is a structural schematic diagram of a specific embodiment of a separate covering plate. DETAILED DESCRIPTION OF THE INVENTION

[0028] In order to make those skilled in the art better understand the solutions of the present invention, the present invention will be further described in detail hereinafter in combination with drawings and specific embodiments.

[0029] Referring to Figures 1 to 4, Figure 1 is a schematic diagram of a covering structure 100 covering the bottom of a bogie truck 200 in the first embodiment of the present application, Figure 2 is a schematic diagram of another viewing angle of Figure 1, Figure 3 is a schematic diagram of the covering structure 100 of Figure 1, and Figure 4 is a schematic diagram of another viewing angle of Figure 3.

[0030] In this embodiment, the covering structure 100 covers the bottom of the bogie 200, and the covering structure 100 includes a bottom plate 1, which is formed of a single-piece plate structure or a multi-plate structure joined together. The bottom plate 1 in FIG. 2 includes a multi-plate structure, which may be connected with bolts and then joined to form a single plate structure, or multiple plate structures may be joined and welded together. An opening 1a is also formed in the bottom plate 1. In this embodiment, the two ends of the bottom plate 1 are distributed along the front-to-rear direction, and both sides of the bottom plate 1 are defined as the left and right sides. The front, rear, left, and right can be understood based on the bogie 200. After the bogie 200 is installed on a railway vehicle, the front-to-rear direction is the length direction of the railway vehicle, and the left-to-right direction is the width direction.

[0031] In this embodiment, the bottom plate 1 has two openings 1a at each end, one on each side, one on the left and one on the right. The openings 1a accommodate the wheels 23 of the railway vehicle, and the four openings 1a accommodate the four wheels 23 on the bogie 200. In this case, both the inside and outside of the wheels 23 are covered by the bottom plate 1, with the space between the wheels 23 approaching on the left and right sides being the inside and vice versa being the outside. In this arrangement, the entire bottom of the bogie 200 is covered by the bottom plate 1. Here, the covering means that, when projected from top to bottom, the projection of the bottom of the bogie 200 is located within the projection plane of the bottom plate 1. As can be seen in FIG. 1, the projections of most of the structure of the bogie 200 are located on the projection plane of the bottom plate 1, and the yaw dampers 24 on both sides are slightly wider than the bottom plate 1.

[0032] With this arrangement, when air flows under the bottom of the bogie 200, it does not enter the complex internal components of the bogie 200, but flows directly through the bottom surface of the bottom plate 1, thereby reducing the air resistance experienced in the area of ​​the bogie 200. In addition, the bottom plate 1 is provided with openings 1a for the wheels 23 to escape, and the covering structure 100 is fixed to the frame of the bogie 200, i.e., the frame body of the frame, and the relative movement with respect to the wheels 23 is small, so the openings 1a occupy a small space as a position for the wheels 23 to escape, reducing the impact of resistance caused by the airflow entering the bogie 200 from the openings 1a, and does not affect the effect of the covering structure 100 in reducing running resistance. Of course, when positioning the opening 1a, its size in the front-to-back and left-to-right directions should be as small as possible, so as to maintain the necessary clearance with the wheels 23, i.e., to avoid interference with the running of the wheels 23, and to reduce as much as possible the airflow flowing into the interior of the bogie truck 200 through the clearance between the opening 1a and the wheels 23.

[0033] As shown in FIG. 3, specifically, the openings 1a are notches provided at the ends of the bottom plate 1. That is, the openings 1a penetrate the bottom plate 1 from top to bottom, with the opening 1a at the front end penetrating the front end of the bottom plate 1 toward the front, and the opening 1a at the rear end penetrating the rear end of the bottom plate 1 toward the rear. As shown in FIG. 2, the openings 1a are generally U-shaped notches. In this way, the wheels 23 can be easily attached, and the openings 1a can be easily formed in the bottom plate 1. As can be seen from this, the openings 1a are not limited to notches, and may be, for example, connecting groove structures penetrating only the top and bottom of the bottom plate 1.

[0034] 3, the edge of the opening 1a of the bottom plate 1 is provided with a protective plate 14 extending upward, the protective plate 14 being arranged to surround the opening 1a, thereby covering a portion of the wheel 23, so that when the bogie 200 is moving, debris, rain, snow, soil, etc. on the railway enters upward through the opening 1a, the protective plate 14 can block it to some extent. The extension size of the protective plate 14 is not limited, and the opening 1a in FIGS. 2 and 3 may be a notch, with the side edges and end edges of the opening 1a extending upward, and the end edges may be arranged to extend toward the wheel surfaces of the wheels 23, so that the height of the end edge portion of the protective plate 14 is longer, because this portion is more likely to encounter debris due to the inertia of the wheel surface when moving.

[0035] In addition, the bogie 200 includes the wheels 23, and the bottom of the brake disc 22 is located at a low position. In this case, as shown in FIG. 2, the bottom plate 1 of the covering structure 100 is provided with a recess 11 that accommodates the brake disc 22 of the bogie 200. The recess 11 is recessed downward based on the top-down viewing angle, and the cavity formed by the recess 11 recessing downward accommodates the brake disc 22. Based on the bottom-up viewing angle, the wall of the recess 11 protrudes downward relative to the bottom surface of the bottom plate 1. Since the protruding portion relative to the entire bottom surface of the flat bottom plate 1 increases air resistance, in this embodiment, the outer surface of the recess 11 is arranged in a streamlined shape. The outer surface of the recess 11 described here is the bottom surface of the recess 11, and the inner surface, the cavity wall of the cavity of the recess 11, is the top surface of the recess 11. By designing the outer surface of the recess 11 to be streamlined, the increased airflow resistance caused by the recess 11 protruding from the bottom surface of the base plate 1 can be reduced, and the arrangement of the recess 11 corresponds to a reinforcing rib of the base plate 1, thereby improving the structural strength of the base plate 1.

[0036] By arranging in this manner, the bottom plate 1 of the covering structure 100 is as close as possible to the bottom of the bogie 200, with almost no increase in the flow resistance at the bottom of the bottom plate 1; that is, the height of the bottom plate 1 is made high and as far away from the ground as possible, and it does not need to be lower than the brake disc 22 overall, nor should it be too low and limited to a lower limit; in this way, the two ends of the bottom plate 1 are as close as possible to the bogie 200, thereby reducing the airflow entering from the ends and further reducing the flow resistance.

[0037] A streamlined structure is a structural shape in which the airflow on the structural surface is not obviously separated, and when moving relative to the airflow, the streamlined structure experiences little airflow resistance. Specifically, in this embodiment, the outer surface of the recess 11 in the base plate 1 is arranged in a spindle shape as shown in Figures 1 and 3. The spindle shape is small at both ends and large in the middle, with both ends tapered and its size gradually increasing toward the middle, with a curved surface extending gently into the middle. In this way, when the airflow passes through the recess 11, it flows along the curved surface from the tapered end to the rear, resulting in little flow resistance. Of course, the streamlined structure is not limited to a spindle shape and can be various, for example, roughly teardrop-shaped. However, since the teardrop shape has only one tapered end, it can only achieve the purpose of reducing resistance when moving in one direction.

[0038] In this embodiment, both the left and right edges of the bottom plate 1 extend upward to form side flanges 12, and / or both the end edges of the bottom plate 1 extend upward to form end flanges 13. The side flanges 12 of the bottom plate 1 also partially cover the sides of the bogie 200, or at least block the gap between the side of the bogie 200 and the side of the bottom plate 1, preventing airflow or other debris from entering the inside of the bogie 200. The end flanges 13 are provided at the ends to prevent airflow from entering the inside of the bogie 200 through the end gap, and as described above, the recesses 11 are arranged to allow the brake discs 22 to escape and the bottom plate 1 can be as close as possible to the bogie 200, so the height of the end flanges 13 provided at the ends is designed to be small, thereby reducing the resistance of airflow when flowing to the ends.

[0039] 2 to 4, the ends of the bottom plate 1 may be arc-shaped, thereby reducing the flow resistance at the ends and making it less likely to interfere with other components when the covering structure 100 swings and deflects along with the bogie 200. Also, as shown in FIG. 2, the bottom plate 1 in this embodiment includes end blocks and a plurality of middle blocks, and the end blocks have arc-shaped ends and openings 1a, forming an irregular structure. The middle blocks may be rectangular blocks, or as shown in FIG. 2, may be three rectangular blocks distributed along the width direction. When the length of the bogie 200 changes, there is no need to change the structure of the end blocks at both ends; only the number of middle blocks needs to be adjusted, allowing for modular assembly.

[0040] With continued reference to FIG. 5, which is a schematic diagram of the mounting arm 2 of FIG.

[0041] The covering structure 100 of this embodiment further includes a mounting arm 2, which includes a first connecting base 21 and a second connecting base 22. The first connecting base 21 of the mounting arm 2 is connected to an end of the bottom plate 1. As shown in FIG. 3 , two mounting arms 2 are provided at each of the two ends of the bottom plate 1, and the two mounting arms 2 are provided on both sides of each end of the bottom plate 1. In this embodiment, the first connecting base 22 specifically has a U-shaped plate structure that opens downward. When attached to the covering structure 100, it is engaged with the protective plate 14 extending from the side edge of the opening 1a of the bottom plate 1. Here, the position of the protective plate 14 may be thickened, and the first connecting base 22 may be fastened to this position with fasteners such as bolts, or may be welded.

[0042] The frame of the bogie 200 includes side sills 201 located on both the left and right sides, with air springs provided in the middle of the side sills 201, and generally, mounting holes for attaching primary suspensions are provided at the bottom of the ends of the side sills 201. In this embodiment, the second connection base 22 and the ends 2011 of the side sills 201 of the bogie 200 are butted together, and as shown in FIG. 5 , a connection plate 221 facing the ends 2011 of the side sills 201 is provided at the upper end of the second connection base 22, with a connection hole provided therein, and the connection plate is butted and fixed to the ends 2011 of the side sills 201 by connection bolts 222. This arrangement makes full use of the positions of the ends 2011 of the side sills 201 to complete the connection between the bogie 200 and the covering structure 100, facilitating installation and ensuring connection strength.

[0043] In this embodiment, a sand scattering device 3 and / or an obstacle deflector 5 are attached to the mounting arm 2. The mounting arm 2 is located at the opening 11a. In this case, a sand scattering device 3 for scattering sand on the railway surface is attached to the mounting arm 2, and the obstacle deflector 5 may be the obstacle deflector plate shown in Fig. 5. That is, the mounting arm 2 can also provide an attachment position for the obstacle deflector 5 or the sand scattering device 3, making the installation of the structure more convenient and preventing the covering structure 100 from interfering with the installation of the sand scattering device 3 and the obstacle deflector 5.

[0044] Please refer to FIG. 6, which is a schematic diagram of the supporting framework 4 of FIG.

[0045] In this embodiment, the covering structure 100 further includes a support framework 4, which is fixed to the upper surface of the bottom plate 1 and connected to the frame of the bogie bogie 200. The support framework 4 can improve the strength of the bottom plate 1 while also improving the reliability of the connection with the bogie bogie 200. 6, the support framework 4 includes a middle frame, which includes two frame cross beams 42 and two frame longitudinal beams 41, the frame longitudinal beams 41 on both sides of the middle frame are respectively connected to curved beams 46, which extend laterally and then upward to connect to the frame of the bogie 200, the frame cross beams 42 on both ends of the middle frame are each connected to one end cross beam 44 by two longitudinal beams 43, the end cross beam 44 is approximately arc-shaped to match the end shape between the two openings 11a of the bottom plate 1, the two longitudinal beams 43 are respectively located between the two recesses 11, and the two frame cross beams 41 of the middle frame are each provided with a support base 45 extending upward to be connected to the frame of the bogie 200. With this arrangement, the support framework 4 can well connect and support the bottom plate 1 and the bogie 200, improving the stability of the structure.

[0046] Furthermore, the bottom plate 1 of the covering structure 100 provided in the above embodiment is made of a composite material, such as a carbon fiber composite material, a fiber-reinforced plastic composite material, an aramid fiber composite material, or a combination material including one or more of the above, and thus has advantages such as high strength and light weight. When the bottom plate 1 is made of a carbon fiber composite material, the mounting arm 2, the support frame 4, and the bottom plate 1 can all be connected and fixed by fasteners such as bolts when joining the multi-plate structure.

[0047] This embodiment further provides a bogie bogie assembly, including a bogie bogie 200 and the covering structure 100 described in any one of the above embodiments, covering the bottom of the bogie bogie 200. This embodiment also provides a railway vehicle, including the above bogie bogie assembly. Both the bogie bogie assembly and the railway vehicle have the same technical effects as the above embodiments, so no further details will be provided.

[0048] 7 to 23, a covering structure 2 for a bogie according to a second embodiment of the present application is shown.

[0049] This specific embodiment discloses a covering structure 2 for a bogie bogie, which may be defined as a covering device for covering the bottom of a bogie bogie, the bogie bogie being provided with a frame body 1 and an axle brake disc 11, the covering structure 2 for the bogie bogie including: a mounting cross beam 2a fixedly connected to the frame body 1 of the bogie bogie; and at least two mounting plates 2b fixedly arranged on the mounting cross beam 2a, at least one of the mounting plates 2b being fixedly connected to the frame body 1 of the bogie bogie, at least one of the mounting plates 2b being provided with a storage section 26 for accommodating the axle brake disc 11, the storage section 26 being similar to the recess 11 in the first embodiment, and the bottom of the storage section 26 being arranged to protrude to the outer surface of the mounting plate 2b.

[0050] In the process of using the covering structure 2 of the bogie bogie provided in this specific embodiment, first, the mounting cross beam 2a and the mounting plate 2b are assembled, and then the assembled covering structure 2 of the bogie bogie is attached to the bogie bogie, or the mounting cross beam 2a and the mounting plate 2b are directly attached to the bogie bogie, and at least one mounting plate 2b is provided with a receiving portion 26 for receiving the axle brake disc 11, so that the large-sized axle brake disc 11 can be accommodated in the receiving portion 26, and the influence of the large-sized axle brake disc 11 on the mounting plate mounting height can be avoided; The bogie bogie covering structure 2 can be applied to bogie bogies having large-sized axle brake discs 11, and during the process of movement, the mounting cross beam 2a and the mounting plate 2b are connected to the frame body 1, reducing the relative movement with the wheel 7 and reducing the gap between the wheel 7 and the escape hole 27 (same as the opening 1a in the first embodiment) of the covering structure 2, and further preventing the airflow from entering the bogie bogie device through the escape hole 27 and generating air resistance, and most of the airflow flows from the outside of the bogie bogie covering structure 2 along the bottom surface of the bogie bogie covering structure 2.

[0051] As is well known, the bogie of a railway vehicle carries the car body to realize the traveling and steering functions. The bogie is installed at the bottom of the car body and generally includes a frame body and components attached to the frame body. Each component is exposed to the outside, and the axle brake discs are large in size, making it difficult to cover the large-sized axle brake discs. During the traveling of the railway vehicle, the exposed components are greatly affected by air resistance, generating large wind resistance.

[0052] Since the airflow is directly directed through the complex components inside the bogie, this embodiment can effectively reduce air resistance and further reduce energy consumption. In addition, the arrangement of the mounting plate and the mounting cross beam 2a can reduce mounting stress.

[0053] 1, 3 and 9, in a specific embodiment, like the first embodiment, the protruding portions of the storage compartments 26 from the outer surface of the mounting plate 2b are arranged in a spindle shape, and if there are multiple storage compartments 26, they are all arranged in a spindle shape, the storage compartments 26 are arranged in parallel, and the tapered ends of the spindles are aligned in the direction of travel of the bogie. Of course, the outer surfaces of the storage compartments 26 protruding from the mounting plate 2b may have other shapes, and this can be determined according to actual circumstances, and no further details are provided here.

[0054] In a specific embodiment, as shown in Figure 8, the mounting cross beam 2a includes two parallel-arranged first and second mounting cross beams 21 and 22, with the first and second mounting cross beams 21 and 22 both arranged perpendicular to the direction of travel of the bogie truck; the mounting plate 2b includes two side plates 24, two end plates 23, and an inspection cover 25, with the two side plates 24 being provided at both longitudinal ends of the first and second mounting cross beams 21 and 22, respectively; the two end plates 23 being provided at the front end of the first mounting cross beam 21 and the rear end of the second mounting cross beam 22, respectively; the inspection cover 25 being provided between the front end of the first mounting cross beam 21 and the second mounting cross beam 22; and the storage section 26 being provided on the end plate 23.

[0055] In a specific connection process, a reinforcing rib 233 is arranged inside the mounting plate 2b, and specifically, a foam core 2331 is filled in the reinforcing rib 233, and a carbon fiber layer 2332 is arranged inside the reinforcing rib 233, as shown in Figure 21. The reinforcing rib 233 is arranged in a keel shape to increase the cross-sectional area and improve the strength and modality of each end plate 23, thereby meeting design needs. In addition, the foam core 2331 has a low density, which realizes a lightweight overall structure. The foam core 2331 has a porous structure, which can absorb sound and dissipate energy, thereby achieving a certain level of noise reduction in the bogie area.

[0056] The side plate 24 may be provided with a reinforcing rib 233 as shown in FIG. 21, which may be determined according to the actual situation, and will not be described in detail here.

[0057] As shown in Figure 22, metal mounting blocks 234 are embedded in the connection points of the end plate 23 where it is connected to the first mounting cross beam 21 or the second mounting cross beam 22, and in the connection points of the inspection cover 25 where it is connected to the first mounting cross beam 21 or the second mounting cross beam 22, thereby effectively alleviating stress concentration at the screw connection points. Both the mounting plate 2b and the mounting cross beam 2a may be composite material elements made from composite materials. By arranging them in this manner, it is possible to prevent the composite material from being directly subjected to screw extrusion and being destroyed. The metal mounting blocks 234 and the composite material elements are bonded with epoxy resin.

[0058] As shown in FIG. 23, the covering structure 2 further includes a mounting arm 5 connected to the end plate 23. A metal plate 235 is embedded at the connection between the end plate 23 and the mounting arm 5. The metal plate 235 has fiber-passing holes 236. When the carbon fiber is supplied and layered to form the structure, the carbon fiber thread passes through the fiber-passing holes 236 and extends to the surrounding carbon fiber cloth to form a resin-impregnated structure. Thus, after the covering structure 2 is installed, the carbon fiber thread and the metal plate 235 simultaneously receive force, increasing the force-receiving area and reducing the shear force of the resin connected around the metal plate 235, thereby improving the connection strength.

[0059] Both ends of the first mounting cross beam 21 and the second mounting cross beam 22 are connected to the side plates 24, and as shown in FIG. 9, the end plate 23 on one side is provided with a second convex portion 231, and the first mounting cross beam 21 is provided with a second recess 212 that engages with the second convex portion 231, and during the assembly process, the second convex portion 231 is inserted into the second recess 212, and as shown in FIG. 10, the end plate 23 on the other side is provided with a second convex portion 231, and the second mounting cross beam 22 is provided with a second recess 212 that engages with the second convex portion 231, and during the assembly process, the second convex portion 231 of the end plate 23 on the other side is inserted into the second recess 212, and as shown in FIG. 9, the inspection cover 25 is provided with a first convex portion 252, and the first mounting cross beam 21 is provided with a second recess 212 that engages with the first convex portion 252. When the inspection cover 25 is attached, the first protrusion 252 is inserted into the first recess 211, and the inspection cover 25 is locked by the locking mechanism. As shown in FIG. 12, the locking mechanism includes a deadbolt 251 provided on the inspection cover 25 so as to protrude movably between a first position and a second position. The second mounting cross beam 22 is provided with a locking protrusion 221 and an unlocking groove 222. When the deadbolt 251 is moved to the first position, it engages with the locking protrusion 221, locking the inspection cover 25 closed, and when the deadbolt 251 is moved to the second position, it engages with the unlocking groove 222, unlocking and opening the inspection cover 25. As shown in FIG. 12, a rack 253 and a locking bar 254 are provided, and the locking bar 254 connects the rack 253 and the deadbolt 251. The rack 253 moves the locking bar 254, which in turn moves the deadbolt 251 between a first position and a second position. When the deadbolt 251 in FIG. 12 is in the first position, it engages with the locking protrusion 221, and at this time, the inspection cover 25 is locked and closed. Specifically, the rack 253 may be moved by a gear or adopt other moving forms, which are not described here in detail.

[0060] Preferably, based on the above embodiment, as shown in FIG. 19, the fastening is performed by arranging a flat head bolt 103 and a butterfly anti-loosening washer 104, and the tenon structure mainly provides the function of preventing falling off. When forming the screw holes in the mounting plates such as the first mounting cross beam 21, the second mounting cross beam 22, the end plate 23, and the side plate 24, a trumpet-shaped opening is prepared. After the flat head bolt 103 is fastened, the bolt head of the flat head bolt 103 will be aligned with the outer surface of the connected element. This prevents the bolt head from colliding with foreign objects (such as pebbles kicked up by the wheels) when the vehicle is driving, making the bolt connection invalid and destroying the covering plate.

[0061] Specifically, tooth-like protrusions are uniformly provided on the contact surface between the butterfly anti-loosening washer 104 and the connected element, and after tightening with the flat head bolt 103, they are pressed against the surface of the connected element, increasing the frictional force and providing an anti-loosening effect.

[0062] In a specific embodiment, relief holes 27 are formed between both sides of the end plate 23 and the two side plates 24 to allow the wheels 7 to protrude, and fenders 28 are provided on at least one of the end plate 23 and the adjacent side plates 24, and the fenders 28 are located outside the circumferential direction of the wheels 7 and gradually incline from the bottom up in the direction approaching the wheels 7.

[0063] Specifically, as shown in FIG. 8, fenders 28 are provided on both sides of the end plate 23, and a fender 28 (the same as the protective plate 14 in the first embodiment) is also provided on the side of the side plate 24 facing the end plate 23. During assembly, the fenders 28 on the end plate 23 are fixed and connected to the fenders 28 on the side plates 24 to form the overall fender 28. From the bottom of the bogie covering structure 2 upward, the fenders 28 gradually incline in the direction approaching the wheels 7, which effectively blocks airflow from being drawn into the bogie during operation and reduces dust accumulation and snow and ice accumulation on the bogie.

[0064] Preferably, the edges of both the end plate 23 and the side plate 24 are provided with flanges, which are disposed perpendicular to the bottom surface of the end plate 23 or side plate 24 .

[0065] As shown in Figure 7, the first mounting cross beam 21 and the second mounting cross beam 22 are both provided with mounting bases 6, and the two side plates 24 are provided with connection holders 8, and when the bogie truck covering structure 2 is connected to the frame main body 1, the mounting bases 6 and connection holders 8 can be fixed and connected to the frame main body 1.

[0066] In addition to the above-mentioned bogie bogie covering structure 2, the present invention further provides a bogie bogie, which includes a frame body 1, a wheel 7 attached to the frame body 1, an axle brake disc 11, and the bogie bogie covering structure 2 disclosed in the above-mentioned embodiment. The structures of other parts of the bogie bogie can be referred to in the prior art, and will not be described in detail in this specification.

[0067] As shown in FIG. 14, an axle brake disc 11 is provided between the two wheels 7 of the frame body 1, and the lower part of the axle brake disc 11 is located within the storage section 26 of the mounting plate 2b, thereby effectively increasing the height of the entire covering plate. Mounting arms 5 (the same as the mounting arms 2 in the first embodiment) are provided at both ends of the frame body 1 along the direction of travel, with one end of the mounting arm 5 fixedly connected to the frame body 1 and the other end fixedly connected to the mounting plate. Preferably, the mounting arms 5 are provided with mounting interfaces for attaching structures such as a sand spreader or an obstacle avoidance device, and the frame body 1 of FIG. 1 is further provided with a vibration damping device 4 and an anti-roll bar 3.

[0068] During use of the bogie provided in this embodiment, each plate element of the bogie covering structure 2 can be individually removed, facilitating maintenance and part replacement. For example, as shown in Fig. 17, to replace the brake pads 101 and clamps 102 of the bogie, the end plates 23 on both ends are removed, and to perform a visual inspection of the bogie during maintenance, the inspection cover 25 is removed, and as shown in Fig. 18, a quick-detachment structure for the inspection cover 25 is used to meet the requirements for quick inspection and repair.

[0069] In addition to the above bogie truck, the present invention also provides a railway vehicle including a bogie truck, and the structures of other parts of the railway vehicle can be referred to the prior art and will not be described in detail in this specification.

[0070] As shown in Figure 16, the railway vehicle includes a car body 9, and when viewed from the side of the railway vehicle, the bogie bogie covering structure 2 has a ship-shaped structure. Along the direction of travel of the car body 9, the middle of the bogie bogie covering structure 2 is a flat surface except for the storage section 26. The front and rear ends of the bogie bogie covering structure 2 are both inclined and curved upward, and the edges of the mounting plates 2b are both provided with flanges of a certain height, which effectively prevent airflow from entering the inside of the bogie bogie and reduce air resistance. In addition, the upward-curved parts of the front and rear ends of the bogie bogie covering structure 2 are provided with end arc surfaces 232. The arrangement of the end arc surfaces 232 balances the rotation angle of the bogie bogie relative to the car body 9 and reduces the gap between the bogie bogie covering structure 2 and the car body 9. This further reduces the airflow entering the bogie bogie and reduces air resistance.

[0071] The terms "first" and "second" in the first recess 211 and second recess 212, the first convex portion 252 and second convex portion 231, and the first mounting cross beam 21 and second mounting cross beam 22 mentioned in this application document do not indicate any order, but are simply used to distinguish different positions.

[0072] Please refer to Figures 24 to 28.

[0073] This specific embodiment discloses a bogie bogie assembly, which includes a frame body 1, a covering plate 4 covering the bottom of the bogie bogie assembly, the bottom surface of the covering plate 4 being a flat surface, and the covering plate 4 being provided with relief holes 42 for allowing the wheels 8 to protrude, the relief holes 42 corresponding to the openings 1a in the first embodiment, a mounting arm 2 provided at both ends of the frame body 1 along the vehicle travel direction, one end of which is fixed and connected to the frame body 1 and the other end of which is fixed and connected to the covering plate 4, and a mounting base 3 provided at an intermediate position of the frame body 1 along the vehicle travel direction, and to which the covering plate 4 is fixed and connected.

[0074] Here, the covering plate 4 may be an integral structure or a separate structure, and the covering plate 4 is provided with an inspection cover 46 that is easy to open and close, and the inspection cover 46 may be rotatably arranged on the covering plate 4 or may be removably engaged with the covering plate 4. Specific details can be determined according to actual circumstances, and no further details are given here.

[0075] In this specific embodiment, the covering plate 4 mainly covers the bottom of the bogie assembly, and covers all the components of the bogie assembly internally. The covering plate 4 has extensions on both sides, which cover the sides of the bogie assembly, and the specifics can be determined according to actual circumstances.

[0076] In use of the bogie assembly provided by the present invention, when the vehicle is in operation, air flows through the bogie assembly, and the covering plate 4 covers the bottom of the bogie assembly and is fixedly connected to the frame body 1 by the mounting arms 2 and mounting bases 3, reducing the relative movement with the wheels 8 and reducing the gap between the wheels 8 and the relief holes 42 in the covering plate 4, thereby preventing the air from entering the bogie assembly through the relief holes 42 and generating air resistance, and most of the air flows from the outside of the covering plate 4 along the bottom surface of the covering plate 4. Rather than the air flow directly flowing through the complex parts within the covering plate 4, air resistance is effectively reduced and energy consumption is also reduced.

[0077] As shown in Figure 27, there are four mounting arms 2, each installed at the end of a support beam arranged along the driving direction of the frame body 1, and at least one joint 21 is provided on the mounting arm 2, which connects structures such as a sand scattering device and an obstacle deflector, facilitating the connection of the bogie assembly with other components.

[0078] In a specific embodiment, the frame body 1 is provided with axle brake discs 51, which are located completely inside the covering plate 4. The small size of the axle brake discs 51 does not affect the placement of the covering plate 4, allowing the covering plate 4 to be placed on a flat surface. Specifically, the covering plate 4 is placed in a ship-shaped structure, with the middle of the covering plate 4 along the direction of travel of the vehicle being flat, and both sides of the plane being symmetrically sloped. Of course, the covering plate 4 may adopt other placement forms, which are not specifically mentioned here. For example, in the first and second embodiments, axle brake discs are used, and the pitch between the covering plate and the frame body is short, which affects the placement of the axle brake discs. Therefore, in the first embodiment, the bottom plate 1 of the covering structure 100 is provided with a relief recess 11, and in the second embodiment, the bogie covering device 2 is provided with a relief storage section 26.

[0079] As shown in FIG. 24 , reinforcing ribs 41 are provided on the inner surface of the covering plate 4. The reinforcing ribs 41 may be arranged in the direction of vehicle travel or in other directions, as determined by actual circumstances. Here, without further elaboration, the arrangement of the reinforcing ribs 41 can effectively improve the structural rigidity of the covering plate 4. Axle brake discs 51 are attached to the connecting axles connecting two wheels 8. The axle brake discs 51 in FIG. 24 are small in size and do not affect the installation of the covering plate 4. Vibration dampers 6 are provided on both sides of the frame body 1 perpendicular to the direction of travel. The vibration dampers 6 may be yaw dampers. To improve stability during travel, the frame body 1 is further provided with anti-roll bars 7. As shown in FIG. 24 , flanges 43 are provided at the edges of the covering plate 4, folded back toward the frame body 1 perpendicular to the bottom surface of the covering plate 4. The arrangement of the flanges 43 improves the strength of the covering plate 4 and prevents airflow from entering the bogie assembly.

[0080] In a specific embodiment, the cover plate 4 is arranged as a separate structure. As shown in FIG. 29, the cover plate 4 is arranged as a separate structure including two end plates 44, two side plates 45, a mounting beam 47, and an inspection cover 46. In the specific connection process, the end plates 44, the side plates 45, and the inspection cover 46 are attached by two mounting beams 47. The separate arrangement reduces the difficulty of processing the cover plate 4 and simplifies the installation and removal process. The inspection cover 46 may be rotatably arranged on the mounting beam 47 by a hinge, or may be removably fastened to the mounting beam 47. Specific details can be determined according to actual circumstances, and no further details are provided here.

[0081] Specifically, the bottom surface of the cover plate 4 may be arranged to be flat, or a combination of at least two of flat, inclined, and arcuate surfaces.

[0082] As shown in FIG. 29, a fender 48 is provided in the escape hole 42 of the covering plate 4. The fender 48 is provided on the outer side of the wheel 8 in the circumferential direction and gradually slopes upward from the bottom surface of the covering plate 4 in the direction approaching the wheel 8, thereby blocking the entrainment of airflow during operation and reducing dust accumulation and snow and ice accumulation on the bogie assembly.

[0083] 26, in a specific embodiment, the frame body 1 is provided with a wheel brake disc 52, at least a portion of which protrudes from the relief hole 42, the frame body 1 is provided with a suspension structure 9 and a brake clamp 521, the wheel brake disc 52 is attached to the wheel 8, and the wheel brake disc 52 can effectively improve the braking effect. A cover plate 4 is provided at the bottom of the frame body 1, and the cover plate 4 in this specific embodiment is the cover plate 4 mentioned in the above embodiment.

[0084] As shown in Figure 27, the frame body 1 is provided with a plurality of mounting bases 3, one end of the mounting base 3 is fixed and connected to the frame body 1, and the other end is fixed and connected to the covering plate 4, and the mounting bases 3 and the covering plate 4 are fixed and connected by connecting elements. In Figure 27, the number of mounting bases 3 is eight, and the eight mounting bases 3 are arranged symmetrically with respect to the mid-section of the frame body 1. According to different actual situations, the number of mounting bases 3 may be other values, and the arrangement positions of the mounting bases 3 may be other forms.

[0085] In addition to the above bogie bogie assembly, the present invention also provides a railway vehicle including the bogie bogie assembly disclosed in the above embodiment. The structures of other parts of the railway vehicle may be referred to in the prior art and will not be described in detail in this specification.

[0086] In this specification, the principle and embodiments of the present invention are described using specific examples, and the description of the above examples is only used to understand the method and spirit of the present invention. Here, those skilled in the art may make some improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. [Explanation of symbols]

[0087] (Figures 1 to 6) 100 ···Covering structure; 1...bottom plate; 11 ···recess; 12 ···Side flange; 13 ···End flange; 14...protective plate; 1a...opening; 2···mounting arm; 21 ···First connection stand; 22 ···Second connection block; 221 ···Connection board; 222 ··· volts; 3. Sand spreading device; 4 ···Supporting framework; 41 ···Frame cross beam; 42 ···Frame longitudinal beam; 43 ···Longitudinal beam; 44...end crossbeam; 45...Support stand; 5. Obstruction clearance device; 200 ···Bogie; 201...side beam; 22 ···Brake discs; 23...wheel; 24. Yaw Damper (Figures 7-23) 1 ···Frame body; 11···axle brake disc; 2. Bogie covering device; 21 ···First mounting cross beam; 211 ···First recess; 212 ···Second recess; 22 ···Second mounting crossbeam; 221 ···Locking protrusion; 222 ···Unlock groove; 23...end plate; 231 ···Second convex part; 232...end arc surface; 233 ···Reinforcing ribs; 2331 ···Foam core; 2332 ···Carbon fiber layer; 234 ···Metal mounting block; 235...metal plate; 236 ···Fiber passage hole; 24 ···Side plate; 25 ···Inspection lid; 251 ···Deadbolt; 252 ···First convex part; 253 ···rack; 254 ···Rock Bar; 26 ···Storage section; 27 ···Relief hole; 28 ···fender; 3. Anti-roll bar; 4 ···Vibration damping device; 5···Mounting arm; 6 ···Mounting base; 7...wheel; 8 ···Connection holder; 9 ···Car body; 101 ···Brake pads; 102 ···Clamp; 103 ···Flat head bolt; 104 ···Butterfly locking washer; (Figures 24-28) 1 ···Frame body; 2···mounting arm; 21 ··· fittings; 3 ···Mounting base; 4...Covering board; 41 ···Reinforcing rib; 42 ···Relief hole; 43 ···flange; 44...end plate; 45 ···Side plate; 46 ···Inspection lid; 47 ···Mounting beam; 48 ···fender; 51 ···Axle brake disc; 52 ···Wheel brake disc; 521 ···Brake clamp; 6 ···Vibration damping device; 7. Anti-roll bar; 8...wheel; 9. Suspension structure

Claims

1. A covering structure for a bogie bogie, the covering structure including a bottom plate that covers the bottom of the bogie bogie, the bottom plate having an opening that allows the wheels of a railway vehicle to escape.

2. The covering structure for a bogie truck according to claim 1, characterized in that the opening is a notch provided in the end of the bottom plate, and / or the edge of the opening is provided with a protective plate extending upward.

3. The covering structure for a bogie bogie as described in claim 1, characterized in that the bottom plate is provided with a recess for accommodating the brake disc of the bogie bogie, the wall of the recess protruding downward relative to the bottom surface of the bottom plate, and the outer surface of the recess being streamlined, or the bogie bogie is provided with a wheel brake disc, and at least a portion of the wheel brake disc protrudes from the escape hole.

4. 4. The covering structure for a bogie truck according to claim 3, wherein the outer surface of the recess is spindle-shaped or teardrop-shaped.

5. The covering structure for a bogie truck according to claim 1, characterized in that both edges of the bottom plate extend upward to form side flanges, and / or both edges of the bottom plate end extend upward to form end flanges.

6. A covering structure for a bogie bogie as described in any one of claims 1 to 5, further comprising an attachment arm, the attachment arm comprising a first connection base connected to the bottom plate and a second connection base connected to the end of the side beam of the bogie bogie.

7. 7. The covering structure for a bogie truck according to claim 6, wherein a sand scattering device and / or an obstacle deflector is attached to the mounting arm.

8. The covering structure for a bogie truck according to claim 7, characterized in that the mounting arm is provided at the position of the opening, the side edge of the opening is provided with a side flange extending upward, and the first connecting base includes a U-shaped plate that is engaged with and fixed to the side flange.

9. The covering structure for a bogie truck according to any one of claims 1 to 5, characterized in that the covering structure further includes a support framework fixed to the bottom plate and connected to a frame of the bogie truck.

10. A covering structure for a bogie truck, which covers the bottom of the bogie truck, the bogie truck is provided with a frame body (1) and an axle brake disc (11), and the covering structure for the bogie truck (2) comprises: a mounting cross beam (2a) fixedly connected to the frame body (1) of the bogie; a covering structure for a bogie truck, characterized in that it includes at least two mounting plates (2b) fixedly arranged on the mounting cross beam (2a), at least one of the mounting plates (2b) being fixedly connected to the frame body (1) of the bogie truck, at least one of the mounting plates (2b) being provided with a storage section (26) for accommodating the axle brake disc (11), and at least two mounting plates (2b) arranged so that a bottom of the storage section (26) protrudes beyond the outer surface of the mounting plate (2b).

11. 11. The covering structure for a bogie truck according to claim 10, wherein the portion of the storage section (26) that protrudes from the outer surface of the mounting plate (2b) is spindle-shaped.

12. 11. The covering structure for a bogie truck according to claim 10, wherein each of the mounting plates (2b) is removably attached to the mounting cross beam (2a) by a tenon structure.

13. The mounting cross beam (2a) includes two parallel-arranged first and second mounting cross beams (21 and 22), the first and second mounting cross beams (21 and 22) being arranged perpendicular to the direction of travel of the bogie truck; the mounting plate (2b) includes two side plates (24), two end plates (23) and an inspection cover (25), the two side plates (24) being provided at both ends of the length of the first mounting cross beam (21) and the second mounting cross beam (22), the two end plates (23) being provided at the front end of the first mounting cross beam (21) and the rear end of the second mounting cross beam (22), the inspection cover (25) being provided between the front end of the first mounting cross beam (21) and the second mounting cross beam (22); 13. The covering structure for a bogie truck according to claim 12, wherein the storage section (26) is provided in the end plate (23).

14. A first protrusion (252) is provided on one of the inspection cover (25) and the first mounting cross beam (21), and a first recess (211) that engages with the first protrusion (252) is provided on the other, and the first protrusion (252) is inserted into the first recess (211); The covering structure for a bogie truck according to claim 13, characterized in that at least one of the inspection cover (25) and the second mounting cross beam (22) is provided with a locking mechanism for locking or unlocking the inspection cover (25).

15. The covering structure for a bogie truck according to claim 14, characterized in that the locking mechanism includes a deadbolt (251) provided on the inspection cover (25) so as to protrude movably between a first position and a second position, and the second mounting cross beam (22) is provided with a locking protrusion (221) and an unlocking groove (222), and when the deadbolt (251) moves to the first position, it engages with the locking protrusion (221) to lock and close the inspection cover (25), and when the deadbolt (251) moves to the second position, it engages with the unlocking groove (222) to unlock and open the inspection cover (25).

16. A covering structure for a bogie truck according to any one of claims 13 to 15, characterized in that relief holes (27) for projecting wheels (7) are formed between both sides of the end plate (23) and the two side plates (24), and fenders (28) are provided on at least one of the end plate (23) and the adjacent side plate (24), the fenders (28) being located circumferentially outside the wheels (7) and gradually inclining from the bottom upward in a direction approaching the wheels (7).

17. A covering structure for a bogie truck as described in any one of claims 10 to 15, characterized in that the mounting plate (2b) and the mounting cross beam (2a) are combined into a ship-shaped structure, and the intermediate position of the ship-shaped structure along the direction of travel is flat, and both ends are inclined surfaces arranged with an upward incline.

18. A bogie bogie assembly comprising a bogie bogie and a covering structure covering the bottom of the bogie bogie, wherein the covering structure is a covering structure for a bogie bogie as claimed in any one of claims 1 to 17.

19. A bogie bogie assembly comprising a bogie bogie and a covering structure covering the bottom of the bogie bogie, the covering structure being a covering structure for a bogie bogie as defined in any one of claims 1 to 9, and further comprising a mounting base (3) provided at an intermediate position along the vehicle travel direction of the frame body (1) and to which the covering plate (4) is fixedly connected.

20. 20. The bogie assembly of claim 19, wherein the bottom surface of said cladding plate is a flat surface.

21. 20. The bogie assembly according to claim 19, wherein the inner surface of the covering plate facing the frame body of the bogie is provided with a reinforcing rib.

22. 22. The bogie assembly according to claim 21, wherein the bottom surface of the covering plate (4) is flat, or a combination of at least two of flat, inclined and arcuate surfaces.

23. A railway vehicle comprising a bogie assembly according to any one of claims 18 to 22.

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