Rail vehicle body underframe structure and rail vehicle

Abstract

The present invention discloses a rail vehicle chassis structure and a rail vehicle, and relates to the technical field of rail vehicles. The chassis structure has two layers of bolsters, and the ends of the top structure of the bolsters and the ends of the bottom structure of the bolsters are arranged in a stepped manner; a wiring channel is provided in the middle of the top of the bolster, and a detachable cover is provided on the top of the wiring channel to close the top opening of the wiring channel; the first end of the first floor of the floor has an installation space, and the bolsters and traction beams are both embedded in the installation space, and the structures on both sides of the installation space are overlapped with the top of the bolsters and the top of the traction beams; the two sides of the first floor have wiring channels arranged longitudinally, and the top and bottom walls of the wiring channels have openings; the opposite side walls of the installation space have openings connected to the wiring channel and the wiring channel; the bolster is provided at the end of the traction beam, and the top surface of the traction beam, the top surface of the bolster, the top surface of the first floor, and the top surface of the cover are coplanar. The chassis structure has high strength and rigidity and has sufficient installation space.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and more specifically, to a rail vehicle body underframe structure. In addition, the present invention also relates to a rail vehicle comprising the above rail vehicle body underframe structure. Background Art

[0002] The underframe structure of an urban rail vehicle is the main load-bearing component of the vehicle body structure. It usually connects the bogie and the vehicle body and is used to transmit longitudinal compression and traction to the vehicle body. It is a key structure for power transmission to ensure safe vehicle driving.

[0003] With the increase in the speed level of urban rail vehicles, higher requirements are placed on the structural strength and longitudinal stiffness of the vehicle body frame; there are more and more equipment, pipelines, cables, etc. under the vehicle, and the installation space under the vehicle is becoming more and more cramped.

[0004] To improve the structural strength and longitudinal rigidity of the vehicle body chassis, the currently feasible solution is to raise the traction beam toward the upper surface of the floor. However, this solution breaks the chassis floor into an inner and outer bolster floor, and the floor cavity is correspondingly interrupted at the bolster. As a result, the floor cavity cannot be used for cable installation, and the traditional off-vehicle wiring method must be adopted, and holes must be drilled in the bolster for wiring. This is not conducive to the installation of brake lines and equipment under the vehicle. At the same time, drilling holes in the bolster will inevitably reduce the strength of the bolster.

[0005] In order to save installation space under the vehicle, the existing feasible solution is to use the cavity of the hollow aluminum profile floor for cable installation. This solution passes the underbody cables through the middle of the aluminum profile cavity along the longitudinal direction of the vehicle, leaving enough space for brake lines, equipment installation, etc. However, in order to ensure the smooth wiring path of the floor cavity, the traction and buffer components need to be welded to the lower surface of the floor. Therefore, it is impossible to increase the strength and rigidity of the chassis by increasing the cross-sectional height of the traction and buffer components. At the same time, this solution does not establish a horizontal wiring channel, and it is necessary to open a hole in the traction beam for horizontal wiring, which further reduces the strength of the traction beam.

[0006] In summary, how to ensure that the vehicle underframe meets the requirements of strength and rigidity while reserving sufficient installation space is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, an object of the present invention is to provide a railway vehicle body underframe structure, which has high strength and rigidity and has sufficient installation space.

[0008] Another object of the present invention is to provide a rail vehicle comprising the above rail vehicle body underframe structure.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A rail vehicle underframe structure comprises a traction beam, a bolster, side beams, an end beam and a floor, wherein the bolster has two layers, and an end of the bolster top structure and an end of the bolster bottom structure are arranged in a stepped manner;

[0011] A wiring channel is provided in the middle of the top of the bolster, and a detachable cover is provided on the top of the wiring channel for closing the top opening of the wiring channel;

[0012] The floor comprises a first floor, a first end of the first floor having an installation space, the bolster and the traction beam are both embedded in the installation space, and structures on both sides of the installation space are overlapped with the top of the bolster and the top of the traction beam;

[0013] Both sides of the first floor are provided with wiring channels arranged in the longitudinal direction, and the top wall and the bottom wall of the wiring channels both have openings;

[0014] The side wall opposite to the installation space has an opening communicating with both the wiring channel and the wiring channel;

[0015] The bolster is arranged at the end of the traction beam, and the top surface of the traction beam, the top surface of the bolster, the top surface of the first floor, and the top surface of the cover plate are coplanar.

[0016] Preferably, the first floor panel and the traction beam are connected by a transition beam, the thickness of the transition beam is greater than the thickness of the first floor panel, the transition beam is located in the angle between the traction beam and the bolster, and the top surface of the transition beam is coplanar with the top surface of the traction beam;

[0017] And / or, the edge of the top surface of the bolster beam and the edge of the top surface of the traction beam both have a sunken portion, and the edge of the side wall of the first floor forming the installation space is overlapped with the sunken portion and welded.

[0018] Preferably, the other end of the traction beam is provided with a mounting beam for mounting a coupler, and the mounting beam comprises a vertical plate and two supporting members arranged on the side of the vertical plate and extending in the longitudinal direction;

[0019] The tops of the two support members are provided with end floors, and the top surfaces of the vertical plates and the end floors are coplanar with the top surface of the traction beam.

[0020] Preferably, a second floor is provided between the two traction beams, and the top surface of the second floor is coplanar with the top surface of the traction beam.

[0021] Preferably, a mounting seat is provided on the side of the bolster substructure for mounting a shock absorber or an anti-roll device, and a first side wall opposite to the mounting seat has a plug-in hole along a transverse collinear line;

[0022] The inserting hole is inserted with a threaded block, and the second side wall of the mounting seat and the threaded block have colinear threaded holes.

[0023] Preferably, the first end of the threaded block has a limit block, and the limit block can abut against the side surface of the mounting seat;

[0024] And / or, a side surface of the second side wall close to the inner cavity of the mounting seat is provided with a limiting boss for guiding the threaded block, and an extending direction of the limiting boss is the length direction of the plug hole.

[0025] Preferably, the number of the wiring channels is greater than or equal to two, and the wiring channels arranged in the longitudinal direction are evenly distributed in the transverse direction.

[0026] Preferably, the opposite sides of the top structure of the bolster are provided with connecting parts, and the top surface of the connecting part is lower than the top surface of the bolster;

[0027] The connecting portion and the cover plate both have connecting holes, and the cover plate and the connecting portion are connected by bolts or screws.

[0028] Preferably, the top structure of the bolster is a hollow profile, and / or the bottom structure of the bolster is a hollow profile.

[0029] A rail vehicle comprises the rail vehicle body underframe structure provided by any one of the above items.

[0030] The present invention provides a rail vehicle underframe structure, wherein a bolster is arranged transversely and a traction beam is arranged longitudinally, with the bolster located at the end of the traction beam. The bolster is a two-layer structure, wherein the length of the bolster bottom structure is greater than that of the bolster top structure, and both ends of the bolster bottom structure protrude beyond the end of the bolster top structure. A gap is left between the two side structures extending transversely from the bolster top structure as a wiring channel, and a cover plate is provided on the top of the wiring channel to close the top end of the wiring channel. A first floor panel defines an installation space near the end of the bolster, which can be a rectangular hole or a T-shaped hole, etc., into which the bolster top structure and the traction beam are inserted, and the bottom surface of the first floor panel overlaps the top surface of the bolster bottom structure. The first floor panel is a hollow structure, and an inner cavity of the first floor panel defines a wiring channel. The wiring channel is located above the two side structures of the first floor panel forming the installation space, and the wiring channel extends longitudinally. Openings are machined in the top and bottom walls of the wiring channel, so that cables can extend from the wiring channel to the top or bottom of the underframe structure. An opening is machined in the inner side wall forming the installation space of the first floor panel, with a first end of the opening connected to the wiring channel and a second end of the opening connected to the wiring channel.

[0031] The top surfaces of the bolster, traction beam, cover plate and first floor are all butted and tightly connected. Since the top surfaces of the bolster, traction beam and cover plate are all coplanar with the top surface of the first floor, the bolster, traction beam and cover plate are raised to the same height as the first floor, effectively improving the longitudinal stiffness and structural strength of the underframe structure. Furthermore, cables can be arranged longitudinally in the first floor or transversely in the wiring channel on the top layer of the bolster, thereby leaving ample installation space for brake lines, various equipment, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0033] Figure 1 A schematic structural diagram of a specific embodiment provided by the present invention;

[0034] Figure 2 An exploded view of a specific embodiment provided by the present invention;

[0035] Figure 3 A schematic diagram of a bolster and a cover plate according to a specific embodiment of the present invention;

[0036] Figure 4 A cross-sectional view of a bolster and a cover plate according to a specific embodiment of the present invention;

[0037] Figure 5 A partial cross-sectional view of a specific embodiment provided by the present invention;

[0038] Figure 6 A schematic diagram of a mounting base according to a specific embodiment of the present invention;

[0039] Figure 7 A schematic diagram of a threaded block according to a specific embodiment of the present invention;

[0040] Figure 8 A schematic diagram of a mounting base and a threaded block according to a specific embodiment of the present invention;

[0041] Figure 9 for Figure 5 Schematic diagram of point A.

[0042] Figures 1-9 , the reference numerals include:

[0043] 1 is a traction beam;

[0044] 2 is a bolster, 21 is a wiring channel, 22 is a cover plate, 23 is a connecting portion, 24 is a mounting seat, 241 is a plug hole, 242 is a threaded hole, 243 is a limiting boss, 244 is a first side wall, 245 is a second side wall, 25 is a threaded block, and 251 is a limiting block;

[0045] 3 is the side beam, 4 is the end beam;

[0046] 5 is the floor, 51 is the first floor, 511 is the wiring channel, 512 is the installation space, 52 is the transition beam, 53 is the second floor, and 54 is the end floor;

[0047] 6 is a mounting beam, 61 is a vertical plate, and 62 is a support member;

[0048] 7 is a cable, 71 is a first cable, 72 is a second cable, and 73 is a third cable;

[0049] 8 is the sinking part;

[0050] W1 is the first weld and W2 is the second weld;

[0051] X is vertical and Y is horizontal. DETAILED DESCRIPTION

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0053] The core of the present invention is to provide a rail vehicle body underframe structure, which has high strength and rigidity and has sufficient installation space. Another core of the present invention is to provide a rail vehicle including the above rail vehicle body underframe structure.

[0054] Please refer to Figures 1 to 9The present invention provides a rail vehicle body underframe structure, including a traction beam 1, a bolster beam 2, a side beam 3, an end beam 4 and a floor 5. Among them, the bolster 2 has two layers, and the end of the top structure of the bolster 2 and the end of the bottom structure of the bolster 2 are stepped; a wiring channel 21 is provided in the middle of the top of the bolster 2, and a cover plate 22 is removably provided on the top of the wiring channel 21 to close the top opening of the wiring channel 21; the floor 5 includes a first floor 51, and the first end of the first floor 51 has an installation space 512, the bolster 2 and the traction beam 1 are both embedded in the installation space 512, and the structures on both sides of the installation space 512 are overlapped on the top of the bolster 2 and the top of the traction beam 1; the two sides of the first floor 51 have wiring channels 511 arranged in the longitudinal direction, and the top wall and bottom wall of the wiring channel 511 have openings; the opposite side walls of the installation space 512 have openings that are connected to the wiring channel 21 and the wiring channel 511; the bolster 2 is arranged at the end of the traction beam 1, and the top surface of the traction beam 1, the top surface of the bolster 2, the top surface of the first floor 51, and the top surface of the cover plate 22 are coplanar.

[0055] like Figure 2 and Figure 3 As shown, the bolster 2 is arranged in the horizontal direction, the traction beam 1 is arranged in the longitudinal direction, and the bolster 2 is located at the end of the traction beam 1; the bolster 2 is a two-layer structure, and the length of the top structure of the bolster 2 is greater than the length of the bottom structure of the bolster 2, and both ends of the bottom structure of the bolster 2 protrude from the end of the top structure of the bolster 2, thereby realizing a stepped arrangement; the side surface of the top structure of the bolster 2 is in contact with the side surface of the traction beam 1 and the top surface is in contact or has a gap fit, and the top surface of the top structure of the bolster 2 is coplanar with the top surface of the traction beam 1, so that the top surface of the top structure of the bolster 2 is connected to the top surface of the traction beam 1 to form a tightly connected plane.

[0056] It is worth noting that when the top surface of the traction beam 1 is a curved surface, the top surface of the bolster 2 and the top surfaces of the adjacent ends of the traction beam 1 are coplanar to achieve curved surface splicing.

[0057] A gap is left between the two side structures of the top layer of the bolster 2 as a wiring channel 21, and the length direction of the wiring channel 21 is horizontal. A cover plate 22 is set on the top of the wiring channel 21, which can be connected by snapping or threading. Specifically, Figure 4 As shown, the side surfaces of the cover plate 22 are in contact with the side surfaces of the top structure of the bolster 2 and the side surfaces of the first floor 51, and the top surfaces are in contact with or have a clearance fit. The top surface of the cover plate 22 is coplanar with the top surface of the top structure of the bolster 2 and the top surface of the first floor 51, so that the top surface of the cover plate 22 is connected to the top surface of the bolster 2 and the top surface of the first floor 51 to form a tightly connected plane.

[0058] like Figure 2As shown, an installation space 512 is opened at the end of the first floor 51 near the bolster 2, which can be a rectangular hole or a T-shaped hole, and the installation space 512 can open up the side wall of the first floor 51 or not. Specifically, when the installation space 512 opens up the side wall of the first floor 51, the bolster 2 and the traction beam 1 are inserted into the installation space 512 along the longitudinal direction. When the installation space 512 does not open up the side wall of the first floor 51, the first floor 51 is placed vertically. During the placement process, the bolster 2 and the traction beam 1 are inserted into the installation space 512 along the vertical direction.

[0059] The top structure of the bolster 2 and the traction beam 1 are inserted into the installation space 512, and the bottom surface of the first floor 51 overlaps the top surface of the bottom structure of the bolster 2. Specifically, the first floor 51 forms a side wall structure of the installation space 512, which is in contact with the end of the top structure of the bolster 2 and the side of the traction beam 1, and the top surface is in contact with or has a gap fit. The side wall at the end of the installation space 512 is in contact with the side wall of the top structure of the bolster 2, and the top surface is in contact with or has a gap fit. The top surface of the first floor 51 is coplanar with the top surface of the bolster 2 and the top surface of the traction beam 1, so that the top surface of the first floor 51 is connected to the top surface of the bolster 2 to form a tightly connected plane.

[0060] It is worth noting that side fitting and top fitting or clearance fit means that the adjacent side surfaces of the two connected parts are fitted and fixedly connected, the top surfaces are spliced, and there is no gap or a small gap at the top surface splicing.

[0061] Since the top surfaces of the bolster 2, the traction beam 1, and the cover plate 22 are all coplanar with the top surface of the first floor 51, the bolster 2, the traction beam 1, and the cover plate 22 are raised to the same height as the first floor 51, effectively improving the longitudinal stiffness and structural strength of the underframe structure.

[0062] The first floor panel 51 is a hollow structure, and the inner cavity of the first floor panel 51 has a wiring channel 511. Specifically, Figure 5 As shown, the wiring channel 511 is located on the two side structures of the first floor 51 forming the installation space 512, and the wiring channel 511 extends longitudinally, so that the cables 7 can be arranged longitudinally; an opening is processed on the top wall of the wiring channel 511, that is, a through hole is processed on the top surface of the first floor 51, so that the cables 7 can be extended from the wiring channel 511 to the top of the chassis structure; an opening is processed on the bottom wall of the wiring channel 511, that is, a through hole is processed on the bottom surface of the first floor 51, so that the cables 7 can be extended from the wiring channel 511 to the bottom of the chassis structure. With such an arrangement, when the chassis structure is actually used, the cables 7 laid in the first floor 51 can be extended to the electrical cabinet on the vehicle, and can also be extended to the junction box under the vehicle, to meet actual needs. Specifically, as Figure 1 As shown, the first cable 71 and the second cable 72 are both arranged in the longitudinal direction, and the third cable 73 is arranged in the transverse direction through the wiring channel 21 .

[0063] It is worth noting that the size of the opening set on the first floor 51 needs to adapt to the number of cables 7, that is, it needs to allow a preset number of cables 7 to extend out, and needs to adapt to the bending radius of the cables 7, that is, it needs to ensure that each cable 7 is bent within the bending radius range without being damaged.

[0064] An opening is processed on the inner wall of the first floor 51 forming the installation space 512, and the first end of the opening is connected to the wiring channel 511, and the second end of the opening is connected to the routing channel 21. Preferably, the opening is located on the inner wall of the first floor 51 forming the installation space 512 at a position opposite to the wiring channel 511, so that the cable 7 located on one side of the installation space 512 can extend to the other side of the installation space 512 through the routing channel 21, that is, the cable 7 can be arranged horizontally in the routing channel 21 on the top layer of the pillow beam 2, thereby leaving sufficient installation space 512 for brake pipes, various equipment, etc.

[0065] On the basis of the above embodiment, the first floor 51 and the traction beam 1 are connected by a transition beam 52. The thickness of the transition beam 52 is greater than the thickness of the first floor 51. The transition beam 52 is located in the angle between the traction beam 1 and the pillow beam 2, and the top surface of the transition beam 52 is coplanar with the top surface of the traction beam 1; and / or, the edge of the top surface of the pillow beam 2 and the edge of the top surface of the traction beam 1 both have a sunken platform 8, and the side wall edge of the first floor 51 forming the installation space 512 is overlapped on the sunken platform 8 and welded.

[0066] Specifically, such as Figure 3 As shown, the length direction of the traction beam 1 is longitudinal, the length direction of the bolster 2 is transverse, and the traction beam 1 and the bolster 2 are connected at the middle part. The installation between the traction beam 1 and the bolster 2 and the traction beam 1 and the first floor 51 requires an installation adjustment amount. The transition beam 52 is used to connect at the position of the installation adjustment amount. Figure 5 and Figure 9 As shown, the side surfaces of the transition beam 52 are in contact with the opposite side surfaces of the adjacent traction beam 1, the bolster beam 2, and the first floor panel 51, and the top surfaces are in contact with or have a clearance fit, and the top surface of the transition beam 52 is coplanar with the top surface of the traction beam 1, so that the top surface of the first floor panel 51 is coplanar with the top surface of the bolster beam 2, the top surface of the first floor panel 51, etc., so that the top surface of the transition beam 52 is in contact with the top surface of the traction beam 1, the top surface of the bolster beam 2, and the top surface of the first floor panel 51 to form a tightly connected plane.

[0067] The transition beam 52 fills the gap between the traction beam 1 and the first floor 51, effectively ensuring that the first floor 51 of the chassis structure is tightly connected to the pillow beam 2 and the traction beam 1 to form a complete plane, and the thickness of the transition beam 52 is greater than that of the first floor 51. With the help of the welds between the first floor 51 and the transition beam 52, and the welds between the transition beam 52 and the traction beam 1, it is effectively ensured that the rigidity change between the first floor 51 and the traction beam 1 is small.

[0068] like Figure 3 As shown, the sunken portion 8 is a recessed structure at the edge of the component it is located on. Sunken portions 8 are provided on both the top structure of the bolster 2 and the edge of the traction beam 1 near the first floor panel 51. During assembly, the bottom side of the first floor panel 51 is overlapped on top of the sunken portion 8, and the two connected components are secured by welding. This arrangement provides a more stable connection between the first floor panel 51, the traction beam 1, and the bolster 2, and the entire surface formed by the top surfaces of the floor panel 5, the traction beam 1, and the bolster 2 of the underframe structure is relatively flat.

[0069] It is worth noting that the chassis structure may only be provided with the transition beam 52 and may adopt any other connection method except welding, or may adopt a connection method of overlapping and welding through the sinking portion 8 .

[0070] On the basis of the above embodiment, the other end of the traction beam 1 is provided with a mounting beam 6 for setting a coupler, and the mounting beam 6 includes a vertical plate and two support members 62 arranged on the side of the vertical plate 61 and extending longitudinally; the top of the two support members 62 is provided with an end floor 54, and the top surface of the vertical plate 61 and the top surface of the end floor 54 are both coplanar with the top surface of the traction beam 1.

[0071] Specifically, such as Figure 2 As shown, a mounting beam 6 is provided at the other end of the traction beam 1. The vertical plate 61 of the mounting beam 6 is used to connect the traction beam 1 and install the coupler. The two support members 62 of the mounting beam 6 are arranged at intervals to support the end floor 54; the end floor 54 is arranged on the top of the two support members 62 to cover the coupler, and the side surfaces of the vertical plate 61 are in contact with the side surfaces of the traction beam 1 and the top surfaces are in contact with or have a clearance fit. The side surfaces of the end floor 54 are in contact with the side surfaces of the vertical plate 61 and the top surfaces are in contact with or have a clearance fit. The top surfaces of the vertical plate 61 and the end floor 54 are all coplanar with the top surface of the traction beam 1, so that the top surfaces of the end floor 54, the top surfaces of the vertical plate 61 and the top surfaces of the traction beam 1 are sequentially butted against each other to form a tightly connected plane.

[0072] Preferably, the bolster 2, the traction beam 1 and the installation beam 6 are welded together in advance and then assembled with the floor 5, which is conducive to simplifying the assembly of the chassis structure.

[0073] It is worth noting that when the top surface of the traction beam 1 is a curved surface, the top surface of the vertical plate 61 is coplanar with the top surface of the adjacent end of the traction beam 1 to achieve curved surface splicing.

[0074] On the basis of the above embodiment, a second floor panel 53 is provided between the two traction beams 1 , and the top surface of the second floor panel 53 is coplanar with the top surface of the traction beam 1 .

[0075] Typically, rail vehicles are equipped with two parallel traction beams 1 along the longitudinal direction. In the present invention, a second floor panel 53 is provided between the two traction beams 1. The second floor panel 53 and the two traction beams 1 can be connected by welding or bolts. The side surfaces of the second floor panel 53 are aligned with the side surfaces of the traction beams 1, and the top surface is aligned or has a clearance fit. The top surface of the second floor panel 53 is also coplanar with the top surface of the traction beams 1. Thus, the top surfaces of the second floor panel 53 and the top surfaces of the traction beams 1 abut to form a tightly connected plane. This arrangement fills the space between the two traction beams 1, effectively ensuring that the second floor panel 53 of the underframe structure and the traction beams 1 are tightly connected to form a complete plane.

[0076] Preferably, the chassis structure is simultaneously provided with a first floor 51, a transition beam 52, a vertical plate 61, an end floor 54 and a second floor 53. The side surfaces of the first floor 51, the side surfaces of the vertical plate 61 and the side surfaces of the end floor 54 are all in contact with the side beams 3 and the top surfaces are in contact with or have a clearance fit. The side surfaces of the end floor 54 away from the traction beam 1 are in contact with the end beam 4 and the top surfaces are in contact with or have a clearance fit. The top surfaces of the first floor 51, the transition beam 52, the vertical plate 61, the end floor 54 and the second floor 53 are all coplanar with the top surface of the traction beam 1, so that the top of the chassis structure is a complete plane.

[0077] On the basis of the above embodiment, a mounting seat 24 is provided on the side of the underlying structure of the bolster 2 for mounting a shock absorber or an anti-roll device. The first side wall opposite the mounting seat 24 has a plug hole 241 along a transverse collinear line; a threaded block 25 is inserted into the plug hole 241, and the second side wall of the mounting seat 24 and the threaded block 25 have a threaded hole 242 that is collinear.

[0078] The mounting base 24 can be used to install preset equipment such as anti-roll devices and vertical shock absorbers. Specifically, Figure 3 As shown, a square notch is provided on the side of the bottom structure of the bolster 2, and the mounting seat 24 is welded in the square notch. Preferably, square notches are provided on the front of the bottom structure of the bolster 2 close to the traction beam 1 and on the back away from the traction beam 1, and square notches are provided at both ends of the front and back of the traction beam 1.

[0079] like Figure 6As shown, the first mounting seat 24 is a hollow structure. The first mounting seat 24 has two opposite first side walls 244 with plug-in holes 241. The plug-in holes 241 can be rectangular holes or circular holes, etc., for plugging the threaded block 25. The first mounting seat 24 has a threaded hole 242 on the second side wall 245, which is used to cooperate with the threaded hole 242 of the threaded block 25 to fix the preset equipment.

[0080] like Figure 7 As shown, the threaded block 25 is a rod-shaped structure. Preferably, the cross-sectional shape of the threaded block 25 is equal to the plug hole 241, the basic size of the threaded block 25 is equal to the basic size of the plug hole 241, and the threaded block 25 is interference fit with the plug hole 241. With this arrangement, the threaded block 25 can be more stably matched with the plug hole 241. A threaded hole 242 is provided on the threaded block 25 along a direction perpendicular to its own length. When assembling, the threaded block 25 is inserted into the inner cavity of the mounting seat 24 along the plug hole 241, and the threaded hole 242 of the threaded block 25 is collinear with the threaded hole 242 of the mounting seat 24. After installation is completed, Figure 8 As shown, the threaded block 25 in the chassis structure is inserted into the mounting seat 24 in the horizontal direction, and no additional bolts are required for fixing. The operator does not need to hold the threaded block 25 to limit the position. The threaded block 25 can be installed with one hand, which is helpful to prevent the threaded block 25 from falling off.

[0081] Furthermore, the base of the preset equipment has a through hole. The through hole on the base of the preset equipment is aligned with the threaded hole 242 of the mounting seat 24, and screws are screwed into the through hole and the threaded hole 242 to complete the assembly.

[0082] Based on the above embodiment, the first end of the threaded block 25 has a limit block 251, which can abut against the side of the mounting seat 24; and / or, the second side wall is close to the side of the inner cavity of the mounting seat 24 and is provided with a limit boss 243 for guiding the threaded block 25, and the extension direction of the limit boss 243 is the length direction of the plug hole 241.

[0083] Specifically, one end of the threaded block 25 is inserted into the first plug-in hole 241, and a limit block 251 is set at the other end of the threaded block 25. The size of the limit block 251 is larger than the size of the plug-in hole 241. During assembly, the threaded block 25 is inserted into the plug-in hole 241 until the limit block 251 abuts against the first side wall 244 of the mounting seat 24 to complete the assembly.

[0084] A limiting boss 243 is provided on the side of the inner cavity of the first side wall 244 of the mounting seat 24. The limiting boss 243 can be a long strip structure or a small protrusion. During assembly, the limiting boss 243 is used to guide the threaded block 25 to assist the threaded block 25 in smoothly inserting into the plug hole 241. Preferably, the limiting boss 243 is located at the bottom of the plug hole 241. After the assembly is completed, the limiting boss 243 is located at the bottom of the threaded block 25, and the limiting boss 243 is used to support the threaded block 25.

[0085] Preferably, the limiting boss 243 adopts an elongated structure, and the length of the limiting boss 243 is equal to the width of the inner cavity of the mounting seat 24 , which is beneficial to improving the guiding and supporting effect of the limiting boss 243 on the threaded block 25 .

[0086] On the basis of the above embodiment, the number of the wiring channels 511 is greater than or equal to two, and the wiring channels 511 arranged in the longitudinal direction are evenly distributed in the transverse direction.

[0087] Specifically, such as Figure 5 As shown, a partition plate extending in the longitudinal direction is provided in the inner cavity of the first floor 51, thereby dividing the inner cavity of the first floor 51 into a number of small chambers arranged side by side and extending in the longitudinal direction as wiring channels 511, and the spacing distances between each group of partition plates are equal, so that each wiring channel 511 is evenly distributed in the transverse direction, and the transverse dimensions of each wiring channel 511 are equal. Such a structure is simple and reasonable, and is conducive to sorting out the cables 7 arranged in the inner cavity of the first floor 51, and is convenient for the installation and maintenance of the chassis structure.

[0088] Based on any of the above embodiments, a connecting portion 23 is provided on the opposite sides of the top structure of the bolster 2, and the top surface of the connecting portion 23 is lower than the top surface of the bolster 2; the connecting portion 23 and the cover plate 22 both have connecting holes, and the cover plate 22 and the connecting portion 23 are connected by bolts or screws.

[0089] Specifically, a connecting hole is vertically provided on the connecting portion 23, and the connecting hole can be a smooth through hole or a threaded hole 242; the connecting portion 23 can be Figure 3 The long strip structure shown, or a circular arc boss structure is adopted. Specifically, a plurality of connection holes are evenly arranged along the horizontal direction on the long strip connection part 23, or a circular arc boss structure is respectively arranged at both ends of the top structure of the pillow beam 2, and a connection hole is arranged on the circular arc boss structure, etc.

[0090] During assembly, the cover plate 22 is overlapped on the top of the connecting part 23. The height of the connecting part 23 below the top structure of the bolster 2 is equal to the thickness of the cover plate 22, so that the top surface of the cover plate 22 is coplanar with the top surface of the top structure of the bolster 2; align the connecting holes of the cover plate 22 with the corresponding connecting holes of the connecting part 23, and screw the bolts or screws into the corresponding connecting holes. The cover plate 22 and the top structure of the bolster 2 are fixed by bolts or screws, so that the cover plate 22 is more stably connected to the top structure of the bolster 2 and is easy to assemble.

[0091] Based on any of the above embodiments, the top structure of the bolster 2 is a hollow profile, and / or the bottom structure of the bolster 2 is a hollow profile. Figure 3 and Figure 4 As shown, the bottom structure of the bolster 2 and the top structure of the bolster 2 are made of hollow profiles, which is beneficial to improving the rigidity and strength of the chassis structure and reducing the weight of the chassis structure.

[0092] Furthermore, the bottom structure of the bolster 2 and the top structure of the bolster 2 are a profile of a specific double-layer cavity. The bottom cavity structure of the profile is the bottom structure of the bolster 2, and the top cavity structure is the top structure of the bolster 2. The two parallel profiles are divided into an outer profile and an inner profile, and the outer profile and the inner profile are welded to the middle profile. The height of the middle profile is equal to the height of the bottom structure of the bolster 2. Specifically, Figure 4 As shown, the outer profile is welded to the middle profile through the first weld W1 and the second weld W2; after welding is completed, the cavity structure at the top of the outer profile and the inner profile is sawed off at the end, so that the end of the top structure of the bolster beam 2 and the end of the bottom structure of the bolster beam 2 form a step.

[0093] It is worth noting that the connection terms such as fixed connection, setting, installation, etc. mentioned above, unless otherwise specified, are preferably welding connections.

[0094] In addition to the above-mentioned rail vehicle body underframe structure, the present invention also provides a rail vehicle including the rail vehicle body underframe structure disclosed in the above-mentioned embodiment. For the structures of other parts of the rail vehicle, please refer to the prior art and will not be described in detail herein.

[0095] It should be noted that the relational terms such as "first" and "second" mentioned above are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities; the "upper surface, lower surface, top, bottom" and the directional words "up, down, left, right" mentioned above are all defined based on the drawings in the specification.

[0096] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0097] The above is a detailed introduction to the rail vehicle underframe structure and rail vehicle provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core concept of the present invention. It should be noted that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A rail vehicle underframe structure, comprising a traction beam (1), a bolster beam (2), a side beam (3), an end beam (4) and a floor (5), characterized in that: The bolster (2) has two layers, and the end of the top structure of the bolster (2) and the end of the bottom structure of the bolster (2) are arranged in a stepped manner; A wiring channel (21) is provided in the middle of the top of the bolster (2), and a cover plate (22) is detachably provided on the top of the wiring channel (21) for closing the top opening of the wiring channel (21); The floor (5) comprises a first floor (51), a first end of the first floor (51) having an installation space (512), the bolster (2) and the traction beam (1) are both embedded in the installation space (512), and the structures on both sides of the installation space (512) are overlapped with the top of the bolster (2) and the top of the traction beam (1); Both sides of the first floor (51) are provided with wiring channels (511) arranged in the longitudinal direction, and the top wall and the bottom wall of the wiring channel (511) both have openings; The opposite side wall of the installation space (512) has an opening that is in communication with both the wiring channel (21) and the wiring channel (511); The bolster (2) is arranged at the end of the traction beam (1), and the top surface of the traction beam (1), the top surface of the bolster (2), the top surface of the first floor (51), and the top surface of the cover plate (22) are coplanar.

2. The rail vehicle underframe structure according to claim 1, characterized in that: The first floor (51) and the traction beam (1) are connected in the middle by a transition beam (52), the thickness of the transition beam (52) is greater than the thickness of the first floor (51), the transition beam (52) is located in the angle between the traction beam (1) and the bolster (2), and the top surface of the transition beam (52) is coplanar with the top surface of the traction beam (1); And / or, the edge of the top surface of the pillow beam (2) and the edge of the top surface of the traction beam (1) both have a sunken platform (8), and the edge of the side wall of the first floor (51) forming the installation space (512) is overlapped with the sunken platform (8) and welded.

3. The rail vehicle underframe structure according to claim 1, characterized in that: The other end of the traction beam (1) is provided with a mounting beam (6) for arranging a coupler, and the mounting beam (6) comprises a vertical plate and two supporting members (62) arranged on the side of the vertical plate (61) and extending in the longitudinal direction; An end floor (54) is provided on the top of the two support members (62), and the top surface of the vertical plate (61) and the top surface of the end floor (54) are both coplanar with the top surface of the traction beam (1).

4. The rail vehicle underframe structure according to claim 1, characterized in that: A second floor (53) is provided between the two traction beams (1), and the top surface of the second floor (53) is coplanar with the top surface of the traction beam (1).

5. The rail vehicle underframe structure according to claim 1, characterized in that: A mounting seat (24) is provided on the side of the bottom structure of the bolster (2) for mounting a shock absorber or an anti-roll device, and a first side wall opposite to the mounting seat (24) has a plug-in hole (241) along a transverse collinear line; The plug-in hole (241) is plugged with a threaded block (25), and the second side wall of the mounting seat (24) and the threaded block (25) have colinear threaded holes (242).

6. The rail vehicle underframe structure according to claim 5, characterized in that: The first end of the threaded block (25) has a limiting block (251), and the limiting block (251) can abut against the side surface of the mounting seat (24); And / or, a limiting boss (243) for guiding the threaded block (25) is provided on the side of the second side wall close to the inner cavity of the mounting seat (24), and the extending direction of the limiting boss (243) is the length direction of the plug hole (241).

7. The rail vehicle underframe structure according to claim 1, characterized in that: The number of the wiring channels (511) is greater than or equal to two, and the wiring channels (511) arranged in the longitudinal direction are evenly distributed in the transverse direction.

8. The rail vehicle underframe structure according to any one of claims 1 to 7, characterized in that: The top structure of the bolster (2) is provided with connecting portions (23) on opposite sides thereof, and the top surface of the connecting portion (23) is lower than the top surface of the bolster (2); The connecting portion (23) and the cover plate (22) both have connecting holes, and the cover plate (22) and the connecting portion (23) are connected via bolts or screws.

9. The rail vehicle body underframe structure according to any one of claims 1 to 7, characterized in that: The top structure of the bolster (2) is a hollow profile piece, and / or the bottom structure of the bolster (2) is a hollow profile piece.

10. A rail vehicle, characterized in that: The rail vehicle body underframe structure comprises the rail vehicle body underframe structure according to any one of claims 1 to 9.

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