Rubber-tyred train and bogie mounting structure

Abstract

A rubber-tyred train and a bogie mounting structure. The bogie mounting structure comprises an underframe bearing structure (2), end structures (3), and a bogie (4); the underframe bearing structure (2) comprises underframe edge beams (21), end side floors (22), sleeper side floors (23), sleeper inner floors (24), and a long floor (25); each end structure (3) comprises a sleeper beam (31), a draft sill (32), and a transition plate (33); the sleeper beams (31) and the draft sills (32) are partially embedded in the underframe bearing structure (2); the bogie (4) comprises rubber tyres (41), steel wheels (42), guide wheels (43), a rotary supporting structure (44), and a framework (45), wherein the rubber tyres (41) are located on the outer sides of the steel wheels (42), and the framework (45) is fixed below the end structures (3) by means of the rotary supporting structure (44); edge beam notches (21a) located in the front and rear positions of the sleeper beams (31) are formed in the lower portions of the underframe edge beams (21), and the edge beam notches (21a) are distributed in the positions corresponding to the rubber tyres (41) and provide movement space for the rubber tyres (41).

Description

Rubber-wheeled train and bogie mounting structure Technical Field

[0001] The invention relates to a rubber-wheeled train and a bogie mounting structure, belonging to the technical field of rail vehicles. Background Art

[0002] Currently, steel-wheel and rail transit systems, characterized by high speed, heavy axle weight, and high transport capacity, have established them as the dominant force in the rolling stock market. They also hold a commanding market share in high-capacity subway vehicles. However, issues such as high noise levels, poor gradeability, and large curve radiuses remain to be addressed. The use of steel-wheel and rubber-tyre co-drive bogies can effectively overcome these weaknesses.

[0003] CN109131413A discloses a steel-wheel and rubber-wheel co-drive bogie and its transportation system. This system couples rubber and steel wheels and can selectively use either a steel-wheel and steel-rail system or a rubber-wheel and flat-rail system, depending on passenger flow, road conditions, and operational performance requirements. However, the bogie and carbody connection in this patented solution utilizes the traditional subway car traction block and air spring connection, limiting the train's ability to negotiate tight curves.

[0004] EP1557337A1 discloses an underframe in which the floor of the vehicle body is directly hollowed out in the wheel set area, and the profiles are arranged horizontally to directly process the traction structure. This is very different from the structure of existing models, and the manufacturing tooling needs to be significantly adjusted.

[0005] The use of a slewing support structure to connect the bogie and car body is beneficial to enhancing the train's ability to pass through small-radius curves, allowing the train to operate in cities with more stringent operating conditions, greatly improving the train's adaptability and versatility.

[0006] However, steel-wheel and rubber-tyre co-drive bogies using a slewing support structure are larger than conventional subway bogies. The car body requires multiple cutouts or a compact design to allow for movement of the wheelset and frame, which negatively impacts the car body's structural strength. Furthermore, the slewing support structure must be installed on the car body, and the traditional subway car body bolster structure is not suitable for this installation. Light rail vehicles using rubber-tyre systems also have lower structural load-bearing requirements than subway vehicles, and their existing mounting structures cannot be directly transferred to subway vehicles for application.

[0007] Summary of the Invention

[0008] The present invention aims to provide a rubber-wheeled train and bogie mounting structure that ensures the structural strength of the vehicle body underframe while providing a notch in the underframe side beam. The technical solution adopted by the present invention is:

[0009] A bogie mounting structure includes an underframe bearing structure, end structures located at both ends of the underframe bearing structure, and a bogie fixed below the end structures. The structural features are:

[0010] The chassis bearing structure includes chassis side beams, end side floors, pillow side floors, pillow inner floors and long floors;

[0011] The end structure includes a bolster, a traction beam and a transition plate; the bolster and traction beam are partially embedded in the interior of the chassis bearing structure; the traction beam, bolster and transition plate are arranged in sequence from the end to the center of the vehicle; the bolster is connected to the chassis side beam;

[0012] The end side floors are located on both sides of the traction beam, the pillow side floors are located on both sides of the pillow beam, and the pillow inner floor is located at the center of the pillow beam;

[0013] The bogie comprises a rubber wheel, a steel wheel, a guide wheel, a slewing support structure and a frame; wherein the rubber wheel is located outside the steel wheel, and the frame is fixed below the end structure through the slewing support structure;

[0014] Side beam notches are provided below the chassis side beam at front and rear positions of the bolster beam. The side beam notches are distributed at positions corresponding to the rubber wheels, providing movement space for the rubber wheels.

[0015] The present invention creatively processes notches in the chassis side beams in front and behind the bolster, solving the problem of interference between the movement space of the wheelset in the bolster area and the existing bolster structure, and arranges traction beams and transition plate structures in front and behind the bolster to solve the problem of insufficient local strength after the notches are processed in the side beams.

[0016] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization:

[0017] In one of the preferred embodiments, the traction beam includes a traction beam floor, a traction beam vertical plate, a wing beam, a screen cabinet floor and an end beam; the screen cabinet floor is located between the end beam and the wing beam, the traction beam vertical plate is located behind the wing beam, and the traction beam floor is located between the two traction beam vertical plates; preferably, the end beam and the wing beam are arranged in parallel.

[0018] In one preferred embodiment, the traction beam uprights are used to transfer longitudinal loads, and the end beams, wing beams and double-layer structured panel cabinet floors are used to transfer transverse loads.

[0019] In one preferred embodiment, the upper surface of the screen cabinet floor is flush with the upper surface of the end side floor; the upper surface of the traction beam floor is flush with the upper surface of the end side floor.

[0020] In one of the preferred embodiments, the bolster includes two bolster cross beams and two bolster longitudinal beams, the bolster cross beams and the bolster longitudinal beams are arranged vertically, and two adjacent and concentric outer ring grooves and inner ring grooves are provided in the middle of the lower rib plate of the cross beam of the bolster cross beam and the lower rib plate of the longitudinal beam of the bolster longitudinal beam, and a plurality of concave bolt holes and through bolt holes are processed in the inner ring groove.

[0021] In one of the preferred embodiments, the bolster cross beam is a multi-cavity profile structure, a lower beam rib is provided on the lower surface of the bolster cross beam, and an oblique rib and vertical ribs are provided inside the bolster cross beam.

[0022] In one of the preferred embodiments, multiple groups of holes are provided in the inner ring groove of the lower surface of the lower rib plate of the crossbeam and the lower rib plate of the longitudinal beam, each group of holes consists of two recessed bolt holes and two through bolt holes, and the through bolt holes are located on the outside of the recessed bolt holes, and each pillow crossbeam and pillow longitudinal beam is processed with two groups of holes distributed symmetrically; each group of holes corresponds to a set of threaded plate fastening systems.

[0023] In one of the preferred embodiments, the two ends of the pillow block crossbeam have a first end notch and a second end notch. The first end notch is arranged on the lower rib plate and the oblique rib plate of the crossbeam to provide a welding space for the weld between the vertical rib and the chassis side beam. The first end notch is fixedly connected to the pillow block cover plate after welding is completed.

[0024] In one preferred embodiment, the side beam notch provides installation space when the second end notch is inserted into the threaded plate.

[0025] In one of the preferred embodiments, the rotary support structure is fixed to the pillow block of the end structure by a threaded plate fastening system; preferably, the threaded plate fastening system includes a threaded plate, a first bolt and a second bolt; holes are provided on the threaded plate, and the first bolt and the second bolt pass through the corresponding holes and connect the rotary support structure and the end structure together; the second end notch is provided on the lower rib plate of the beam to provide space for the threaded plate to be inserted.

[0026] The bolster, longitudinal beam and cross beam are double-layer cavity structures, with notches at both ends of the cross beam, which can be inserted with threaded plates used to fix the bogie.

[0027] In one of the preferred embodiments, the threaded plate is inserted into the bolster crossbeam through the first end notch; the threaded plate is inserted into the bolster longitudinal beam through the longitudinal beam process hole; the threaded plate is fixed to the cavity of the bolster crossbeam and the bolster longitudinal beam through the first bolt at the recessed bolt hole position for installing the rotary support structure.

[0028] In one of the preferred embodiments, the slewing support structure includes a first slewing body, a second slewing body and balls. The first slewing body and the second slewing body can move relative to each other under the action of the balls. Thus, the bogie and the bolster part of the car body are connected by a slewing support structure with balls.

[0029] In one of the preferred embodiments, the bolster and the side sill of the underframe form a "mu" shaped structure; preferably, the end structure further includes a cable duct and a bolster cover plate, wherein the cable duct is embedded inside the bolster; the bolster and the side sill of the underframe are connected by the bolster cover plate.

[0030] In one of the preferred embodiments, flat stiffening plates are provided on the lower surface of the long floor, and the side sill notch extends to the position of the flat stiffening plates.

[0031] In one of the preferred embodiments, the end side floor, the bolster side floor, the bolster inner floor, the long floor, the drawbeam floor and the cabinet floor all adopt a double-layer closed cavity structure. Seven floors inside and before and after the bolster all adopt double-layer structures, effectively isolating the working noise of the bogie from being transmitted into the car.

[0032] In one of the preferred embodiments, the end side floor, the bolster side floor, the bolster inner floor and the long floor have the same height.

[0033] Based on the same inventive concept, the present invention also provides a rubber-tyred train, which includes multiple carriages. Each carriage includes an upper structure of the car body, a coupler buffer system and the bogie mounting structure as described above. Adjacent two carriages are connected by the coupler buffer system; the upper structure of the car body is located above the underframe bearing structure, the end structure is located at both ends of the underframe bearing structure, the coupler buffer system is horizontally fixed on the end side of the end structure, and above the end structure area, the upper structure of the car body is provided with a door opening for passengers to enter and exit.

[0034] Thus, the rubber-tyred train of the present invention is equipped with a steel wheel and rubber wheel co-drive bogie at both ends of the underframe of each car body, and the marshaling cars are connected by couplers.

[0035] The bolster of the car body underframe adopts a frame structure, and is connected to the side sill of the underframe on both sides to form a "mu" shaped structure, and two rows of concentric circular grooves are machined on the profile in the middle "square" shaped structure part for connecting with the "mu" shaped two-axle bogie frame through a circular slewing support body.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] 1) The train simultaneously has the performances of large passenger capacity and passing through small-radius curves, adapts to more severe operating line conditions, and the versatility is greatly improved;

[0038] 2) The "eye" - shaped bolster structure has good overall load - bearing performance. Its multi - layer cavity structure is processed with open - type gaps at both ends, which is convenient for inserting threaded blocks. The structure is simple and has high reliability;

[0039] 3) The vehicle has good sound insulation performance, providing a comfortable space for passengers inside the vehicle;

[0040] 4) By adopting an aluminum alloy profile grooving structure to replace the carbon steel disc, the lightweight effect is good. Brief Description of the Drawings

[0041] Figure 1 is a schematic diagram of the vehicle composition according to an embodiment of the present invention;

[0042] Figure 2 is the bottom view of the underframe structure of the present invention;

[0043] Figure 3 is a partial view of the car - body structure of the present invention;

[0044] Figure 4 is an exploded view of the underframe structure of the present invention;

[0045] Figure 5 is the B - B view of Figure 3 of the present invention;

[0046] Figure 6 is a schematic diagram of the bolster structure of the present invention;

[0047] Figure 7 is a partial enlarged view of Figure 6 of the present invention;

[0048] Figure 8 is a cross - sectional view of the bolster cross - beam profile of the present invention;

[0049] Figure 9 is a schematic diagram of the connection structure between the bogie and the car - body of the present invention;

[0050] Figure 10 is a schematic diagram of the threaded plate fastening system of the present invention;

[0051] Figure 11 is the A - A view of Figure 1 of the present invention

[0052] Figure 12 is the C - C view of Figure 11 of the present invention;

[0053] Figure 13 is the D - D view of Figure 11 of the present invention;

[0054] Figure 14 is a schematic diagram of the slewing bearing installation of the present invention.

[0055] In Figures 1 to 14: vehicle body upper structure 1, door opening 1a, chassis bearing structure 2, chassis side beam 21, side beam notch 21a, flat rib plate 211, end side floor 22, pillow side floor 23, pillow inner floor 24, long floor 25, end structure 3, pillow beam 31, outer ring groove 31a, inner ring groove 31b, concave platform bolt hole 31c, through bolt hole 31d, pillow beam cross beam 311, first end notch 311a, second end notch 311b, cross beam lower rib plate 3111, oblique rib plate 3112, vertical rib 3113, pillow beam longitudinal beam 312, longitudinal beam process hole 312a, longitudinal beam lower rib plate 3121, traction Beam 32, traction beam floor 321, traction beam vertical plate 322, wing beam 323, screen cabinet floor 324, end beam 325, transition plate 33, wire pipe 34, pillow block cover plate 35, bogie 4, rubber wheel 41, steel wheel 42, guide wheel 43, slewing support structure 44, first rotating body 441, second rotating body 442, ball 443, frame 45, hook buffer system 5, threaded plate fastening system 6, threaded plate 61, first bolt 62, second bolt 63, bolt system three 7. DETAILED DESCRIPTION

[0056] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0057] As shown in the vehicle configuration diagram in Figure 1, the rubber-tyred train structure of this embodiment includes a vehicle body superstructure 1, an underframe support structure 2, end structures 3, bogies 4, and a coupler / buffer system 5. The vehicle body superstructure 1 is located above the underframe support structure 2, while the end structures 3 are located at both ends of the underframe support structure 2. The bogies 4 are fixed below the end structures 3, and the coupler / buffer system 5 is horizontally fixed to the ends of the end structures 3. Above the end structures 3, the vehicle body superstructure 1 is provided with a doorway 1a for passenger entry and exit.

[0058] Figure 2 is a top-down view of the underframe structure, Figure 3 is a partial view of the vehicle body structure, Figure 4 is an exploded view of the underframe structure, and Figure 5 is the BB view of Figure 3. The underframe support structure 2 primarily consists of underframe side beams 21, end floor panels 22, bolster side floor panels 23, bolster inner floor panels 24, and long floor panels 25. The end floor panels 22, bolster side floor panels 23, bolster inner floor panels 24, and long floor panels 25 can be set to the same height. The end structure 3 primarily consists of bolster beams 31, traction beams 32, transition plates 33, wire guides 34, and bolster cover plates 35. The traction beams 32, bolster beams 31, and transition plates 33 are arranged sequentially from the end toward the center of the vehicle. The wire guides 34 are embedded within the bolster beams 31 to allow for the passage of electrical cables and brake lines. Bolster cover plates 35 are located at the four corners of the bolster beams 31 and connect the bolster beams 31 to the underframe side beams 21. The coupling buffer system 5 is located at both ends of the chassis supporting structure 2 and is fixed on the side of the traction beam 32 for connecting other carriages in front and behind.

[0059] The traction beam 32 is mainly composed of a traction beam floor 321, traction beam vertical plates 322, wing beams 323, a screen cabinet floor 324, and an end beam 325. The end beam 325 is arranged parallel to the wing beam 323, and the screen cabinet floor 324 is located between the end beam 325 and the wing beam 323, with its upper surface flush with the upper surface of the end side floor 22. The traction beam vertical plates 322 are located behind the wing beams 323, and the traction beam floor 321 is located between the two traction beam vertical plates 322, with its upper surface flush with the upper surface of the end side floor 22. The traction beam 32 has a compact structure. The traction beam vertical plates 322 transmit longitudinal loads, while the end beams 325, wing beams 323, and the double-layered screen cabinet floor 324 can transmit transverse loads, effectively solving the problem of longitudinal and transverse load transmission of the coupling buffer system 5 when the train has a very small radius. Among them, the traction beam vertical plates 322 are in a vertical state when in use and extend in a plane parallel to the longitudinal direction. The wing beams 323 are beams extending in the transverse direction. The longitudinal direction and the transverse direction refer to the longitudinal direction of the train and the transverse direction of the train, respectively.

[0060] At the front and rear positions of the bolster 31, a side beam notch 21a of a certain length is set below the chassis side beam 21, and the notch is processed to the position of the flat rib plate 211 parallel to the lower surface of the long floor 25, thereby ensuring the movement space required by the bogie 4 to the greatest extent.

[0061] The end structure 3 is located at both ends of the underframe bearing structure 2. Its bolster 31 and drawbeam 32 are partially embedded inside the underframe bearing structure 2, breaking and decomposing the end part of the long floor 25 of the underframe bearing structure 2. Five short floors are newly added, including two end-side floors 22 on both sides of the drawbeam 32, two bolster-side floors 23 on both sides of the bolster 31, and one in-bolster floor 24 at the center of the bolster 31. The bolster 31 and the drawbeam 32 maintain the structural continuity. A number of transition plates 33 are arranged at the rear side of the bolster 31. Moreover, the bolster 31 and the underframe side beam 21 form a "mu" shaped structure, which has good overall stiffness and strength and is beneficial to overcoming the problem of insufficient car body stiffness caused by the door opening 1a and the side beam notch 21a located below the door opening.

[0062] The end-side floor 22, the bolster-side floor 23, the in-bolster floor 24, and the long floor 25, as well as the drawbeam floor 321 and the cabinet floor 324, all adopt a double-layer closed cavity structure, which is beneficial to improving the sound insulation effect in the bogie area, preventing the noise during the operation of the bogie from being transmitted to the passengers in the passenger compartment, and enhancing the interior comfort.

[0063] Figure 6 is a schematic diagram of the bolster structure, Figure 7 is a partial enlarged view of Figure 6, and Figure 8 is a sectional view of the bolster crossbeam profile. The bolster 31 is mainly composed of two relatively long bolster crossbeams 311 and two relatively short bolster longitudinal beams 312. The bolster crossbeam 311 and the bolster longitudinal beam 312 are arranged perpendicularly. Two adjacent and concentric outer grooves 31a and inner grooves 31b are machined in the middle of the crossbeam lower rib plate 3111 of the bolster crossbeam 311 and the longitudinal beam lower rib plate 3121 of the bolster longitudinal beam 312. A number of concave bolt holes 31c and through bolt holes 31d are machined in the inner groove 31b.

[0064] The bolster crossbeam 311 is a multi-cavity profile structure. The lower surface is provided with a crossbeam lower rib plate 3111, and the inside is provided with an inclined rib plate 3112 and a vertical rib 3113. First end notches 311a and second end notches 311b are machined at both ends of the bolster crossbeam 311. The first end notch 311a cuts off the crossbeam lower rib plate 3111 and the inclined rib plate 3112 to provide a welding space for the weld between the vertical rib 3113 and the underframe side beam 21. After the welding is completed, it is filled with a bolster cover plate 35 and welded around to strengthen the local strength of this part. The second end notch 311b cuts off the crossbeam lower rib plate 3111 to provide a space for inserting the threaded plate 61.

[0065] Figure 9 is a schematic diagram of the bogie-carriage connection structure. The bogie 4 primarily consists of a rubber wheel 41, a steel wheel 42, a guide wheel 43, a slewing support structure 44, and a frame 45. The rubber wheel 41 is located outside the steel wheel 42. The bogie 4 is secured to the underside of the end structure 3 via the slewing support structure 44. The side beam notches 21a in the underframe side beam 21 correspond to the rubber wheel 41, providing space for movement and allowing the threaded plate 61 to be inserted into the second end notch 311b.

[0066] Figure 10 is a schematic diagram of a threaded plate fastening system. The threaded plate fastening system 6, used to secure the slewing support structure 44 to the end structure 3, consists of a threaded plate 61, a first bolt 62, and a second bolt 63. The threaded plate 61 has four holes: the center two for the first bolts 62 and the outer two for the second bolts 63.

[0067] Figure 11 is view AA of Figure 1, Figure 12 is view CC of Figure 11, and Figure 13 is view DD of Figure 11. Eight groups of holes are machined into the inner groove 31b on the lower surfaces of the crossbeam lower ribs 3111 and longitudinal beam lower ribs 3121. Each group consists of two recessed bolt holes 31c and two through-bolt holes 31d, with the through-bolt holes 31d located outside the recessed bolt holes 31c. Each bolster crossbeam 311 and longitudinal beam 312 is machined with two symmetrically distributed groups of holes. All holes are arranged in a circular pattern on the horizontal plane.

[0068] Each set of holes corresponds to a threaded plate fastening system 6. The threaded plate 61 is inserted into the bolster crossbeam 311 through the first end notch 311a. The threaded plate 61 is inserted into the bolster longitudinal beam 312 through the longitudinal beam process hole 312a. The threaded plate 61 is then secured to the cavities of the bolster crossbeam 311 and longitudinal beam 312 using first bolts 62 at the recessed bolt holes 31c. This is then used to install the slewing support structure 44.

[0069] Figure 14 is a schematic diagram of the slewing support installation. The slewing support structure 44 is mainly composed of a first slewing body 441, a second slewing body 442 and a ball 443. The first slewing body 441 and the second slewing body 442 can move relative to each other under the action of the ball 443.

[0070] The installation steps for fixing the bogie 4 on the bolster 31 are as follows:

[0071] Step 1: Fix the slewing support structure 44 to the bolster 31 using the threaded plate 61 and the second bolt 63 of the threaded plate fastening system 6;

[0072] Step 2: Fix the frame 45 on the bogie 4 to the slewing support structure 44 through the bolt system 7 to complete the installation of the bogie 4.

[0073] At the corresponding part of the third bolt system 7, the bolster 31 is pre-processed with an outer groove 31a to provide the installation and movement space for the bolt head in the third bolt system 7.

[0074] The bolster of the underframe in this embodiment adopts a frame structure, which is connected to the side beams of the underframe on both sides to form a "mu" - shaped structure, and is connected to the "mu" - shaped two - axle bogie frame through a circular rotary support, solving the problems of too small radius and large - slope climbing of the large - capacity rubber - tired subway system, and at the same time solving the problem of the body's own strength. By optimizing the bolster structure and innovating the connection method between the car body and the bogie, the interference problem between the movement space of the wheelset in the bolster area and the existing bolster structure is solved. In this embodiment, by adopting an aluminum alloy profile grooving structure to replace the carbon steel disc, the weight can be effectively reduced.

[0075] The content clarified in the above embodiments should be understood that these embodiments are only used to illustrate the present invention more clearly, rather than to limit the scope of the present invention. After reading the present invention, various equivalent forms of modification of these embodiments by those skilled in the art all fall within the scope defined by the appended claims of the present invention.

Claims

1. A bogie mounting structure, comprising an underframe bearing structure (2), end structures (3) located at both ends of the underframe bearing structure (2), and a bogie (4) fixed below the end structures (3); Features: The chassis bearing structure (2) comprises chassis side beams (21), end side floors (22), pillow side floors (23), pillow inner floors (24) and long floors (25); The end structure (3) comprises a bolster (31), a traction beam (32) and a transition plate (33); the bolster (31) and the traction beam (32) are partially embedded in the interior of the chassis bearing structure (2); the traction beam (32), the bolster (31) and the transition plate (33) are arranged in sequence from the end to the center of the vehicle, and the bolster (31) is connected to the chassis side beam (21); The end side floor (22) is located on both sides of the traction beam (32), the pillow side floor (23) is located on both sides of the pillow beam (31), and the pillow inner floor (24) is located at the center of the pillow beam (31); the bogie (4) comprises a rubber wheel (41), a steel wheel (42), a guide wheel (43), a slewing support structure (44) and a frame (45); wherein the rubber wheel (41) is located on the outside of the steel wheel (42), and the frame (45) is fixed below the end structure (3) through the slewing support structure (44); A side beam notch (21a) is provided below the chassis side beam (21) and is located in front of and behind the bolster beam (31). The side beam notch (21a) is distributed at a position corresponding to the rubber wheel (41).

2. The bogie mounting structure according to claim 1, characterized in that: The traction beam (32) includes a traction beam floor (321), a traction beam vertical plate (322), a wing beam (323), a screen cabinet floor (324) and an end beam (325); the screen cabinet floor (324) is located between the end beam (325) and the wing beam (323), the traction beam vertical plate (322) is located behind the wing beam (323), and the traction beam floor (321) is located between two traction beam vertical plates (322); preferably, the end beam (325) and the wing beam (323) are arranged in parallel.

3. The bogie mounting structure according to claim 2, characterized in that: The traction beam upright plate (322) is used to transfer the longitudinal load, and the end beam (325), the wing beam (323) and the double-layer structured cabinet floor (324) are used to transfer the transverse load.

4. The bogie mounting structure according to claim 2, characterized in that: The upper surface of the screen cabinet floor (324) is flush with the upper surface of the end side floor (22); the upper surface of the traction beam floor (321) is flush with the upper surface of the end side floor (22).

5. The bogie mounting structure according to claim 1, characterized in that: The bolster (31) comprises two bolster cross beams (311) and two bolster longitudinal beams (312), wherein the bolster cross beams (311) and the bolster longitudinal beams (312) are arranged vertically, and two adjacent and concentric outer ring grooves (31a) and inner ring grooves (31b) are provided in the middle of the lower rib plate (3111) of the cross beam of the bolster cross beam (311) and the lower rib plate (3121) of the longitudinal beam of the bolster longitudinal beam (312), and a plurality of concave platform bolt holes (31c) and through bolt holes (31d) are processed in the inner ring groove (31b).

6. The bogie mounting structure according to claim 5, characterized in that: The bolster cross beam (311) is a multi-cavity profile structure. A cross beam lower rib plate (3111) is provided on the lower surface of the bolster cross beam (311), and an inclined rib plate (3112) and a vertical rib (3113) are arranged inside the bolster cross beam (311).

7. The bogie mounting structure according to claim 6, characterized in that: Multiple groups of holes are provided in the inner ring groove (31b) on the lower surfaces of the cross beam lower rib plate (3111) and the longitudinal beam lower rib plate (3121). Each group of holes consists of two counterbore bolt holes (31c) and two through bolt holes (31d), and the through bolt holes (31d) are located outside the counterbore bolt holes (31c). Two sets of holes distributed symmetrically are machined on each bolster cross beam (311) and bolster longitudinal beam (312); each set of holes corresponds to a set of threaded plate fastening systems (6).

8. The bogie mounting structure according to claim 5, characterized in that: Both ends of the bolster cross beam (311) have a first end notch (311a) and a second end notch (311b). The first end notch (311a) is provided on the cross beam lower rib plate (3111) and the inclined rib plate (3112) to provide a welding space for the weld between the vertical rib (3113) and the underframe side beam (21). After the welding is completed, the first end notch (311a) is fixedly connected to the bolster sealing plate (35).

9. The bogie mounting structure according to claim 8, characterized in that: The side beam notch (21a) provides an installation space for the second end notch (311b) to insert the threaded plate (61).

10. The bogie mounting structure according to claim 7, characterized in that: The slewing support structure (44) is fixed on the bolster (31) of the end structure (3) through the threaded plate fastening system (6); preferably, the threaded plate fastening system (6) includes a threaded plate (61), a first bolt (62), and a second bolt (63); holes are formed in the threaded plate (61), and the first bolt (62) and the second bolt (63) pass through the corresponding holes and connect the slewing support structure (44) and the end structure (3) together; the second end notch (311b) is provided on the cross beam lower rib plate (3111) to provide a space for the threaded plate (61) to be inserted.

11. The bogie mounting structure according to claim 10, characterized in that: The threaded plate (61) is inserted into the bolster cross beam (311) through the first end notch (311a); the threaded plate (61) is inserted into the bolster longitudinal beam (312) through the longitudinal beam process hole (312a); at the position of the counterbore bolt hole (31c), the threaded plate (61) is fixed in the cavities of the bolster cross beam (311) and the bolster longitudinal beam (312) through the first bolt (62) for installing the slewing support structure (44).

12. The bogie mounting structure according to any one of claims 1 to 11, characterized in that: The slewing support structure (44) includes a first slewing body (441), a second slewing body (442), and balls (443). The first slewing body (441) and the second slewing body (442) can move relative to each other under the action of the balls (443).

13. The bogie mounting structure according to any one of claims 1 to 11, characterized in that: The bolster (31) and the underframe side beam (21) form an "eye" - shaped structure; preferably, the end structure (3) further includes a wire duct (34) and a bolster sealing plate (35), wherein the wire duct (34) is embedded inside the bolster (31); the bolster (31) and the underframe side beam (21) are connected through the bolster sealing plate (35).

14. The bogie mounting structure according to any one of claims 1 to 11, characterized in that: A flat rib plate (211) is provided on the lower surface of the long floor (25), and the edge beam notch (21a) extends to the position of the flat rib plate (211).

15. The bogie mounting structure according to any one of claims 1 to 11, characterized in that: The end side floor (22), the pillow side floor (23), the pillow inner floor (24), the long floor (25), the traction beam floor (321) and the screen cabinet floor (324) all adopt a double-layer closed cavity structure.

16. The bogie mounting structure according to any one of claims 1 to 11, characterized in that: The end side floor (22), the pillow side floor (23), the pillow inner floor (24) and the long floor (25) are all of the same height.

17. A rubber-tyred train, comprising a plurality of vehicles, each vehicle comprising a vehicle body superstructure (1), a coupling buffer system (5) and a bogie mounting structure as claimed in any one of claims 1 to 16, and two adjacent vehicle sections are connected by the coupling buffer system (5); characterized in that: The vehicle body upper structure (1) is located above the underframe bearing structure (2), the end structures (3) are located at both ends of the underframe bearing structure (2), the hook buffer system (5) is horizontally fixed to the end side of the end structure (3), and above the end structure (3) area, the vehicle body upper structure (1) is provided with a door opening (1a) for passengers to enter and exit.

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