Stainless steel vehicle structure

Abstract

The application discloses a kind of stainless steel vehicle structures.The vehicle structure includes vehicle body, equipment box, equipment suspension beam and cable preloading system;The bottom of the vehicle body is provided with side beam, pillow beam, corrugated plate, low crossbeam and support, the side beam is located on both sides of the vehicle body, pillow beam is located at both ends of the vehicle body;Between two pillow beams, a plurality of low crossbeams are distributed;The equipment box is fixed on the equipment suspension beam, and the equipment suspension beam is installed on the side beam;The cable preloading system is longitudinally distributed in the middle of the vehicle body, fixed below the low crossbeam, and above the equipment suspension beam;The side beam is a closed cavity structure, and a flange structure is provided inside below the side beam.The application realizes the overall pre-arrangement of wiring pipeline, and has good modularization effect.

Description

Technical Field

[0001] This invention belongs to the field of rail vehicle technology and relates to a rail vehicle body structure, especially for EMU and subway vehicles. Background Technology

[0002] For rail passenger vehicles, since the interior space is mainly used to accommodate passengers, large equipment is usually installed and fixed on the outside of the vehicle. For heavy rail vehicles such as EMU trains and subway cars, apart from equipment such as air conditioners and pantographs which are installed on the roof, other large equipment is mainly installed under the underframe.

[0003] Currently, there are three main ways to install large equipment under the chassis of a vehicle. The first is the floor suspension method, in which the equipment is fixed on the longitudinally distributed C-shaped profiles of the floor extrusion profile. This method is often used in aluminum alloy vehicle bodies with hollow profile structures. This structure requires high floor rigidity and is not conducive to achieving lightweighting. The second is the chassis beam suspension method, in which the equipment is fixed on the transversely arranged beams welded under the floor. This method is often used in stainless steel vehicle bodies. The third is the chassis side beam installation method, in which the equipment is fixed on the side beams on both sides of the chassis and does not have direct contact with the floor. This method is currently commonly used in aluminum alloy vehicle bodies.

[0004] There are two installation methods for the underframe side beams: suspension and support. The bolts in the support installation method do not directly bear the weight of the equipment, resulting in higher safety, as illustrated in patent number CN20141061982.5. The underframe side beam installation method significantly reduces the vibration transmitted from the equipment under the vehicle to passengers above the floor, improving passenger comfort. Simultaneously, since the floor does not need to bear a large concentrated load, the strength requirements for the floor can be reduced, effectively reducing the floor weight and improving the vehicle's lightweight effect, making the vehicle more energy-efficient.

[0005] The key to the installation method of the underframe side beams is that the side beams must have sufficient support strength and rigidity. Since the hollow profiles of aluminum alloy vehicle bodies allow for the simultaneous extrusion of the mounting stiffeners during the side beam extrusion process, avoiding the problem of insufficient local strength caused by welding, aluminum alloy vehicles are now widely used. However, stainless steel vehicle bodies have a plate beam structure, and the underframe side beams are cold-formed sheet metal parts, typically with a "C"-shaped opening. They lack sufficient rigidity to directly support equipment weighing over 1 ton, or even 2 tons, so side beam installation is generally not used. Furthermore, stainless steel vehicle floors typically use a corrugated plate structure, requiring crossbeams underneath to provide sufficient rigidity to support passengers. These crossbeams can be used to install under-vehicle equipment, which is another important reason why stainless steel vehicles currently do not use underframe side beams for installing large under-vehicle equipment.

[0006] However, the crossbeam suspension method for stainless steel vehicles has significant drawbacks: to achieve sufficient rigidity and strength for suspending large equipment underneath, the crossbeam cross section height must be sufficiently large, and the distance between crossbeams cannot be too great. Weight reduction is achieved by incorporating several U-shaped holes in the crossbeams, which also serve as recesses for the installation of cables and electrical conduits underneath the vehicle. However, these conduits must be pre-installed in the crossbeam holes before the chassis is welded; otherwise, subsequent operations are impossible. This method cannot achieve modular pre-installation of under-vehicle wiring, failing to meet the demands of current modular intelligent manufacturing and hindering the ease of maintenance. Furthermore, it lacks the energy-saving and comfort advantages of the side beam mounting method. Summary of the Invention

[0007] This invention aims to provide a stainless steel vehicle structure that solves the following technical problems by adopting a new underframe side beam structure and integrating a wiring conduit structure into the corrugated floor:

[0008] 1. The existing stainless steel chassis structure cannot accommodate the side beam mounting method for large equipment under the vehicle;

[0009] 2. The stainless steel vehicle underframe wiring conduits need to be pre-laid during the underframe manufacturing process, and there are significant difficulties in optimizing the solution and reworking it after the underframe is assembled and welded.

[0010] 3. The cable conduits running through the crossbeams of the base frame present a problem of inconvenient maintenance in the later stages;

[0011] 4. The problem that under-vehicle wiring conduits cannot be pre-laid modularly under the dashboard and installed as a whole under the chassis;

[0012] 5. Equipment vibration is transmitted to the vehicle floor through the underframe crossbeams, and then directly to the passengers, resulting in poor comfort.

[0013] 6. The problem of difficulty in further reducing the weight of the vehicle body with a crossbeam suspension system.

[0014] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0015] A stainless steel vehicle structure includes a vehicle body, an equipment box, an equipment suspension beam, and a cable pre-installation system. Its structural features include: the bottom of the vehicle body is provided with side beams, bolster beams, corrugated plates, low crossbeams, and supports; the side beams are located on both sides of the vehicle body, and the bolster beams are located at both ends of the vehicle body; a number of low crossbeams are distributed between two bolster beams; the equipment suspension beam is mounted on the side beams, and the equipment box is fixed to the equipment suspension beam; the cable pre-installation system, longitudinally distributed in the middle of the vehicle body, is fixed below the low crossbeams and located above the equipment suspension beam.

[0016] The side beam is a closed cavity structure, with a flange structure provided on the inner side below the side beam.

[0017] According to embodiments of the present invention, the present invention can be further optimized, and the optimized technical solution is as follows:

[0018] In one preferred embodiment, the side beam includes an outer side beam and an inner side beam that both extend longitudinally; the cross-section of the outer side beam is generally C-shaped.

[0019] The outer beam includes a vertical outer beam section, an upper outer beam section connected to the upper part of the vertical outer beam section, and a lower outer beam section connected to the lower part of the vertical outer beam section.

[0020] The inner side beam includes a vertical inner side beam portion, an upper inner side beam portion connected to the upper part of the vertical inner side beam portion, and a lower inner side beam portion connected to the lower part of the vertical inner side beam portion.

[0021] The upper outer side beam and the upper inner side beam are fixedly connected, and the lower outer side beam and the lower inner side beam are fixedly connected, forming a closed cavity.

[0022] In one preferred embodiment, the upper outer beam portion includes an upper boss or upper recess connected to the upper part of the vertical outer beam portion, and the extended end of the upper boss or upper recess is fixedly connected to the upper inner beam portion.

[0023] In two preferred embodiments, the lower outer beam portion includes a recessed platform connected to the lower part of the vertical outer beam portion and a flange connected to the extended end of the recessed platform; the flange is fixedly connected to the lower inner beam portion; or

[0024] The lower outer edge beam includes a recessed platform connected to the lower part of the vertical outer edge beam, a lower protrusion connected to the extended end of the recessed platform, and a platform connected to the extended end of the lower protrusion.

[0025] In one preferred embodiment, a connecting beam is provided in the closed cavity between the outer beam and the inner beam; the connecting beam is fixedly connected to the outer beam and the inner beam respectively.

[0026] In one preferred embodiment, the cross-section of the connecting beam is generally S-shaped, including a first connecting part and a second connecting part distributed in parallel, and a third connecting part arranged perpendicular to the first connecting part; the second connecting part is fixedly connected to the vertical outer beam, the first connecting part is fixedly connected to the vertical inner beam, and the third connecting part is fixedly connected to the lower outer beam.

[0027] In one preferred embodiment, a fourth connecting part is provided above the first connecting part, which is fixedly connected to the vertical inner side beam.

[0028] In one preferred embodiment, the cross-section of the inner beam is generally C-shaped.

[0029] In one preferred embodiment, the lower inner side beam bends and extends toward the vertical outer side beam of the outer side beam to form a U-shaped bend; the two ends of the U-shaped bend are respectively fixedly connected to the lower outer side beam.

[0030] In one preferred embodiment, a short crossbeam is provided below the corrugated plate, and both ends of the short crossbeam are connected to the inner side beam of the side beam. A second flange is provided below the inner side beam. The equipment suspension beam with the equipment box is mounted above the second flange and the first flange and connected by a fastening system. The support is fixed below the crossbeam, and the cable pre-installation system is fixed below the support by a cable trough, and a certain gap h is reserved between the lower surface of the cable trough and the upper surface of the equipment suspension beam. Preferably, the gap h is greater than 5 mm and less than 20 mm.

[0031] In one preferred embodiment, the cable pre-installation system includes two parts: a cable trough and a cable. The two ends of the cable trough are provided with connecting parts and a second web plate. Several parallel partitions are provided between the second web plates. The cable is arranged between the second web plate and the partitions. The cable is pre-installed after the cable trough, and the entire cable pre-installation system is installed on the support.

[0032] The stainless steel vehicle structure of the present invention uses a chassis side beam mounting method for large equipment under the vehicle, and the vehicle body adopts a plate beam structure.

[0033] The present invention sets the underframe side beam as a closed cavity structure and sets a flange structure on the inner side below the side beam for installing the main crossbeam of the undercarriage equipment.

[0034] This invention reduces the cross-sectional height of the underframe beam, allowing the distance between the lower surface of the beam and the upper surface of the flange of the side beam to accommodate the wire groove and the protruding part of the main beam of the equipment, while also reserving a gap of 5-20mm, more preferably about 10mm. It can also eliminate manufacturing errors and the influence of the pre-set upper deflection of the vehicle body.

[0035] The underframe side beams of this invention adopt a closed cavity structure. A C-shaped inner side beam is embedded inside the C-shaped outer side beam, and a hat-shaped connecting beam is provided between the inner and outer side beams. A cantilever stiffener is provided on the inner side. The C-shaped inner side beam and the hat-shaped connecting beam are first welded together, and then welded to the C-shaped outer side beam. A hat-shaped longitudinal beam structure with an opening facing downward is provided in the middle of the underframe. The undercarriage cable tray is hoisted below the hat-shaped beam structure. The cable tray and the hat-shaped longitudinal beam form a closed cavity to achieve the load-bearing effect of the middle beam.

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

[0037] 1. This invention enables the overall pre-arrangement of wiring conduits, has good modularity, is easy to install and maintain, and is more suitable for the needs of intelligent manufacturing;

[0038] 2. The longitudinally arranged grooves under the underframe of the present invention form a closed cavity with the support, which acts as a middle longitudinal beam and improves the rigidity of the vehicle body, especially the underframe floor.

[0039] 3. The vehicle body structure of the present invention is simple, and the underframe crossbeams are not limited by the position of the equipment under the vehicle, which can be arranged more evenly and with lighter weight;

[0040] 4. The main crossbeam for mounting the undercarriage equipment of the present invention can provide lateral stiffness, resulting in higher overall vehicle body stiffness;

[0041] 5. The vibration of the undercarriage equipment of the present invention is not directly transmitted from the crossbeam to the floor and then to the passengers, resulting in higher vehicle comfort. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the base frame structure according to an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the side beam of the base frame according to an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the assembly of the base frame side beams according to an embodiment of the present invention;

[0046] Figure 5 yes Figure 2 AA section view;

[0047] Figure 6 yes Figure 5 A magnified view of a portion of the image;

[0048] Figure 7 This is an installation diagram of a cable pre-installation system according to an embodiment of the present invention;

[0049] Figure 8 This is a schematic diagram of a closed cavity structure of a wire groove according to an embodiment of the present invention;

[0050] Figure 9 This is a schematic diagram of three forms of side beam cross-sections according to another embodiment of the present invention;

[0051] Figure 10 This is a schematic diagram of another embodiment of the present invention.

[0052] In the figure

[0053] Vehicle body 1, door opening 1a, side beam 11, outer side beam 111, plug weld hole 1111, flange one 111a, upper boss 111b, lower recess 111c, lower boss 111d, platform 111e, upper recess 111f, connecting beam 112, connecting part one 112a, connecting part two 112b, connecting part three 112c, inner side beam 113, process hole 113a, flange two 113b, U-shaped bend 113c, sleeper beam 12, corrugated plate 13, low crossbeam 14, support 15, connecting part 15a, web plate one 15b, equipment box 2, equipment suspension beam 3, fastening system 31, cable pre-installation system 4, cable trough 41, connecting part 41a, web plate two 41b, partition 41c, cable 42, weld w. Detailed Implementation

[0054] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" used below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0055] like Figure 1 As shown, the stainless steel vehicle structure of this embodiment mainly consists of a vehicle body 1, an equipment box 2, an equipment suspension beam 3, and a cable pre-installation system 4. The side of the vehicle body 1 has several pairs of door openings 1a. The bottom of the vehicle body 1 has side beams 11, bolster beams 12, corrugated plates 13, low crossbeams 14, and supports 15, etc., wherein the side beams 11 are located on both sides of the vehicle body 1, and the bolster beams 12 are located at both ends of the vehicle body 1 and are perpendicularly connected to the side beams 11; a number of parallel low crossbeams 14 are distributed between two bolster beams 12. The equipment box 2 is fixed to the equipment suspension beam 3, which is installed on the side beams 11. The cable pre-installation system 4 is longitudinally distributed in the middle of the vehicle body 1, fixed below the low crossbeams 14, and located above the equipment suspension beam 3.

[0056] Reference Figure 3 and Figure 4 As shown, the side beam 11 consists of three parts: an outer side beam 111, a connecting beam 112, and an inner side beam 113. The outer side beam 111 is generally C-shaped, with an upper boss 111b on top, a flange 111a and a lower recess 111c on the bottom, and several plug welding holes 1111 on the upper surface of the lower recess 111c. The flange 111a is located below the lower recess 111c. When the height of the side beam 11 is constrained by the limit, the opening height of the flange 111a and the upper boss 111b can be increased to provide installation space for the equipment suspension beam 3.

[0057] In some embodiments, the inner side beam 113 is generally C-shaped, with a process hole 113a on the belly and a flange 113b below.

[0058] In some embodiments, a connecting beam 112 is provided between the outer beam 111 and the inner beam 113. The connecting beam 112 has a first connecting portion 112a and a second connecting portion 112b that are distributed in parallel, and a third connecting portion 112c that is distributed perpendicularly to the first connecting portion 112a is provided below the second connecting portion 112b. The inner beam 113 is nested inside the outer beam 111, and several connecting beams 112 are provided in the middle to connect it.

[0059] During the assembly of the side beam 11, the connecting part 112a of the connecting beam 112 and the inner side beam 113 are pre-fixed into a whole by resistance spot welding or other forms of welding. Then, the outer side beam 111 is placed over the upper and lower sides of the inner side beam 113, with its web fitting against the connecting part 112b of the connecting beam 112. The welding torch tip passes through the process hole 113a of the inner side beam 113 to complete the resistance spot welding connection w between the outer side beam 111 and the connecting part 112b of the connecting beam 112, and completes the plug welding w' connection w' between the outer side beam 111 and the connecting part 112c of the connecting beam 112 through the plug welding hole 1111 of the outer side beam 111. At the same time, the upper and lower sides of the outer beam 111 and the inner beam 113 are fixed into a whole by resistance spot welding or other forms of welding. The flange 111a and the flange 113b are overlapped, and their rigidity and strength are combined to support the suspension beam 3 of the equipment.

[0060] Reference Figure 5 and Figure 6 As shown, a short crossbeam 14 is provided below the corrugated plate 13. The two ends of the short crossbeam 14 are connected to the inner side beam 113 of the side beam 11. The equipment suspension beam 3 with the equipment box 2 is mounted above the flange 113b and flange 111a and is connected by the fastening system 31. The support 15 is fixed below the crossbeam 14. The cable pre-installation system 4 is fixed below the support 15 through the cable tray 41, and a certain gap h is reserved between the lower surface of the cable tray 41 and the upper surface of the equipment suspension beam 3. h is generally greater than 5mm and less than 20mm.

[0061] like Figure 7 and Figure 8 As shown, the cable pre-installation system 4 includes two parts: a cable tray 41 and cables 42. The cable tray 41 has connecting parts 41a and a second web 41b at both ends, with several parallel partitions 41c between the second webs 41b. Cables 42 are arranged between the second webs 41b and the partitions 41c. The partitions 41c isolate cables 42 with different functions and purposes, and also serve to isolate electromagnetic interference. The partitions 41c also enhance the rigidity of the cable tray 41.

[0062] After the cable 42 is pre-arranged in the cable tray 41, the cable pre-installation system 4 is fixedly connected to the connecting part 15a through the connecting part 41a, so that the whole system is installed on the support 15.

[0063] Example 2

[0064] Unlike Example 1, as Figure 9 As shown, the upper part of the outer beam 111 can be provided with an upper boss 111b or an upper recess 111f to accommodate the connection space with the side wall of the vehicle body 1. The lower part can be provided with a lower recess 111c, a lower boss 111d, and a platform 111e to adjust the height of the flange 111a, thereby solving the problems of installation space and clearance of the equipment suspension beam 3.

[0065] Example 3

[0066] Unlike Embodiment 1, the equipment suspension beam 3 is fixed to the inner vertical surface of the side beam 11. The outer side beam 111 and the inner side beam 113 are welded to form a closed cavity. A U-shaped bend 113c structure is provided on the lower side of the inner side beam 113. The two sides of the U-shaped bend 113c are fixed to the outer side beam 111 by welds w. The equipment suspension beam 3 is installed inside the U-shaped bend 113c. The fastening system 31 can be installed by passing through the outer process hole 113a of the U-shaped bend 113c.

[0067] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the present embodiments by those skilled in the art will fall within the scope defined by the appended claims.

Claims

1. A stainless steel vehicle structure, comprising a vehicle body (1), an equipment box (2), an equipment suspension beam (3), and a cable pre-installation system (4); characterized in that, The bottom of the vehicle body (1) is provided with side beams (11), pillow beams (12), corrugated plates (13), low crossbeams (14) and supports (15). The side beams (11) are located on both sides of the vehicle body (1), and the pillow beams (12) are located at both ends of the vehicle body (1). A number of low crossbeams (14) are distributed between the two pillow beams (12). The equipment suspension beam (3) is installed on the side beams (11), and the equipment box (2) is fixed on the equipment suspension beam (3). The cable pre-installation system (4) which is longitudinally distributed in the middle of the vehicle body (1) is fixed below the low crossbeams (14) and above the equipment suspension beams (3). The support (15) is fixed below the low crossbeam (14), and the cable pre-installation system (4) is fixed below the support (15) through the cable groove (41). The cable groove (41) and the support (15) form a closed cavity, forming a middle longitudinal beam. The side of the vehicle body (1) is provided with several pairs of door openings (1a). The side beam (11) is a closed cavity structure, and a flange structure is provided on the inner side below the side beam (11); The side beam (11) includes an outer side beam (111) and an inner side beam (113) that extend longitudinally; the cross-section of the outer side beam (111) is generally C-shaped; The outer beam (111) includes a vertical outer beam portion, an upper outer beam portion connected to the upper part of the vertical outer beam portion, and a lower outer beam portion connected to the lower part of the vertical outer beam portion; The inner side beam (113) includes a vertical inner side beam portion, an upper inner side beam portion connected to the upper part of the vertical inner side beam portion, and a lower inner side beam portion connected to the lower part of the vertical inner side beam portion. The upper outer side beam and the upper inner side beam are fixedly connected, the lower outer side beam and the lower inner side beam are fixedly connected, and the outer side beam (111) and the inner side beam (113) are fixedly connected to form a closed cavity; A connecting beam (112) is provided in the closed cavity between the outer side beam (111) and the inner side beam (113); the connecting beam (112) is fixedly connected to the outer side beam (111) and the inner side beam (113) respectively.

2. The stainless steel vehicle structure according to claim 1, characterized in that, The upper outer edge beam includes an upper boss (111b) or an upper recess (111f) connected to the upper part of the vertical outer edge beam. The extended end of the upper boss (111b) or the upper recess (111f) is fixedly connected to the upper inner edge beam.

3. The stainless steel vehicle structure according to claim 1, characterized in that, The lower outer edge beam includes a recessed platform (111c) connected to the lower part of the vertical outer edge beam and a flange (111a) connected to the extended end of the recessed platform (111c); the flange (111a) is fixedly connected to the lower inner edge beam. or The lower outer beam includes a recessed platform (111c) connected to the lower part of the vertical outer beam, a lower protrusion (111d) connected to the extended end of the recessed platform (111c), and a platform (111e) connected to the extended end of the lower protrusion (111d).

4. The stainless steel vehicle structure according to any one of claims 1-3, characterized in that, The cross-section of the connecting beam (112) is generally S-shaped, including a first connecting part (112a) and a second connecting part (112b) distributed in parallel, and a third connecting part (112c) arranged perpendicular to the first connecting part (112a); the second connecting part (112b) is fixedly connected to the vertical outer beam, the first connecting part (112a) is fixedly connected to the vertical inner beam, and the third connecting part (112c) is fixedly connected to the lower outer beam.

5. The stainless steel vehicle structure according to claim 4, characterized in that, Above the first connecting part (112a), there is also a fourth connecting part, which is fixedly connected to the vertical inner side beam.

6. The stainless steel vehicle structure according to any one of claims 1-3, characterized in that, The cross-section of the inner beam (113) is C-shaped.

7. The stainless steel vehicle structure according to any one of claims 1-3, characterized in that, The lower inner side beam bends and extends toward the vertical outer side beam of the outer side beam (111) to form a U-shaped bend (113c); the two ends of the U-shaped bend (113c) are fixedly connected to the lower outer side beam.

8. The stainless steel vehicle structure according to any one of claims 1-3, characterized in that, The corrugated plate (13) is provided with a short crossbeam (14) below it. The two ends of the short crossbeam (14) are connected to the inner side beam (113) of the side beam (11). The inner side beam (113) is provided with a flange two (113b) below it. The equipment suspension beam (3) with the equipment box (2) is mounted on the flange two (113b) and flange one (111a) and connected by a fastening system (31). A certain gap h is reserved between the lower surface of the wire trough (41) and the upper surface of the equipment suspension beam (3).

9. The stainless steel vehicle structure according to claim 8, characterized in that, The gap h is greater than 5mm and less than 20mm.

10. The stainless steel vehicle structure according to any one of claims 1-3, characterized in that, The cable pre-installation system (4) includes two parts: a cable trough (41) and a cable (42). The two ends of the cable trough (41) are provided with a connecting part (41a) and a second web plate (41b). Several parallel partitions (41c) are provided between the second web plates (41b). The cable (42) is arranged between the second web plate (41b) and the partitions (41c). The cable (42) is pre-installed after the cable trough (41). The cable pre-installation system (4) is installed on the support (15).

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