Vehicle body structure of lightweight straddle type hinged monorail vehicle

Abstract

The vehicle body structure of the light-weight straddle type hinged monorail vehicle comprises a bottom frame, side walls, a vehicle roof, a cab and an end wall, and the bottom frame is sequentially provided with a vehicle coupler installation base, a bottom frame end beam, a one-position end bogie wheel cabin frame, a bottom frame floor, a bottom frame edge beam and a two-position end bogie wheel cabin frame from the one-position end to the two-position end. The chassis concentrated bearing area is formed by splicing and welding chassis boundary beams and chassis floors made of aluminum profiles, and the chassis concentrated bearing part is formed by splicing and welding high-strength alloy steel. The whole structure is simple, the modularization degree of all parts is high, and the production efficiency can be improved; a coupler seat, a traction rod seat, a cab and other parts are of carbon steel structures, force is dispersed and evenly transmitted to a chassis floor in a multi-point riveting mode, other main structures are hollow aluminum alloy sections, the weight of a vehicle body is further reduced, product quality control and weight reduction of the vehicle body are facilitated, and the requirements for light weight and high strength are met.

Description

Technical Field

[0001] The invention relates to the technical field of articulated straddle-type monorails, and in particular to a vehicle body structure of a lightweight straddle-type articulated monorail vehicle. Background Art

[0002] The straddle-type monorail is a type of urban rail transit system with medium and low capacity. Compared with the traditional urban rail transit system, the straddle-type monorail has the advantages of flexible layout, small turning radius, high space utilization, low capital investment, short construction period, and excellent climbing ability. It has good prospects for promotion and application.

[0003] Currently, the commonly used rail transit car body materials are carbon steel, stainless steel and aluminum alloy. Stainless steel car bodies have advantages in corrosion resistance and maintenance-free, but stainless steel has poor thermal material processability, sheet metal and welding processes are difficult, and spot welding is mostly used to connect various components, and the structure has poor air tightness. Carbon steel car body structure has low cost, but has great disadvantages in corrosion resistance and weight, with a large number of parts and welds, and a low degree of structural automation.

[0004] Aluminum alloy has excellent anti-corrosion effect, low density and good strength, can greatly reduce the weight of the vehicle, has excellent forming and processing performance, high surface quality and beautiful appearance, can be connected by riveting, arc welding and other methods, and has high structural design flexibility.

[0005] After searching, it was found that Chinese invention patent application CN115771536A discloses a body structure of a rail-type rubber-wheeled rapid transit system, which includes a chassis, end walls, side walls, a roof, and an end wall. The chassis is a carbon steel beam row structure, and the side walls, end walls and roof are welded from aluminum alloy profiles. The various components are riveted together. The chassis beam row structure is low in cost and quick to produce, but the steel chassis has large thermal deformation during welding, is heavy, and is easily corroded. The interior floor of the passenger compartment bears the vertical load of passengers, and there are requirements for the strength of the interior floor, which is not good for the energy consumption of the entire vehicle and the wear of the track brake pads.

[0006] Chinese invention patent application CN115214731A discloses an articulated straddle-type monorail vehicle intermediate frame, which includes a base frame, end walls, side walls, a roof and an articulated seat, and the various components are welded together; the articulated seat and the base frame are riveted together by rivets. This articulated straddle-type monorail vehicle has a simple body structure, light weight and low production cost, but the whole vehicle adopts a carbon steel welded structure, which has large deformation after welding, heavy weight, and a complex vehicle completion process, which is not conducive to modular production.

[0007] It can be seen that the existing technology uses pure carbon steel structure in the chassis area, and the weight of the car body is relatively high, which is not conducive to green and lightweight production. How to achieve less parts, lightweight, green while meeting the strength requirements of the car body structure, reduce production costs, and improve production efficiency is a problem that needs to be solved in this field. Summary of the invention

[0008] In view of the problems in the related art, the present invention proposes a body structure of a lightweight straddle-type articulated monorail vehicle, which can comprehensively solve the above problems and can take into account both lightweight and high strength requirements.

[0009] To this end, the specific technical scheme adopted by the present invention is as follows: a car body structure of a lightweight straddle-type articulated monorail vehicle, including a chassis, side walls and a roof, wherein the chassis is welded by a chassis floor and chassis side beams, and is characterized in that the chassis is provided with a coupler mounting seat, a chassis end beam, a first-end bogie wheel well frame, a chassis floor and a chassis side beam, and a second-end bogie wheel well frame in sequence from the first end to the second end, wherein: The coupler mounting seat is a symmetrically distributed box structure, wherein the middle part has a coupler mounting plate for fixing the coupler, and the rear end surface of the coupler mounting seat is riveted and fixed to the chassis end beam, so that the longitudinal force on the coupler mounting seat is transmitted to the chassis floor through the chassis end beam; The wheel well frame of the first-end bogie is welded from aluminum alloy profiles and fixed to the chassis floor by welding or riveting; The wheel well frame of the second-end bogie is welded from alloy steel plates and bent parts, and the mounting frame of the articulated bogie is a welded structure of alloy steel plate beams and cast steel parts. The two are connected by welding and then riveted to the chassis floor by rivets, so that the load in the bogie area is smoothly transferred to the chassis floor; The lower part of the side wall has a side wall lower side beam, and the chassis side beam is overlapped on the side wall lower side beam and fixed by rivets; the steering overhead spring mounting seat is connected with the chassis side beam and the side wall lower side beam by bolts to bear the vertical load of the whole vehicle; A bogie traction rod seat is provided at the bottom of the chassis floor, which is close to the wheel well frame of the first-end bogie. The car body transmits the bogie traction force to the car body chassis floor through the bogie traction rod seat, thereby driving the whole vehicle to move. The traction force is transmitted to the subsequent towing vehicle through the articulated bogie mounting frame, thereby realizing the movement of the marshaled vehicle.

[0010] Furthermore, a driver's cab is fixed above one end of the chassis floor, and the driver's cab includes a driver's cab frame composed of a driver's cab end beam, an airtight wall and a driver's cab side beam. Small chassis side beams welded to the sides of the chassis side beams are arranged on both sides of the one end of the chassis, and the side walls have door columns and side wall end columns. The driver's cab side beams fall on the small chassis side beams and are fixed by welding. The driver's cab side beams, the small chassis side beams, the side wall lower side beams and the side wall end columns are riveted and fixed by transition connecting plates to locally reinforce the structure.

[0011] Furthermore, the concentrated load-bearing area of ​​the underframe is welded from underframe side beams and an underframe floor of an aluminum profile, and the concentrated load-bearing parts of the underframe are welded from high-strength alloy steel. The concentrated load-bearing parts of the underframe include: the coupler mounting seat, the first-end bogie wheel well frame and the second-end bogie wheel well frame.

[0012] Furthermore, the side wall includes a first side wall and a second side wall, and the first side wall and the second side wall are symmetrically distributed on both sides about the center line of the vehicle, and the roof is overlapped on the first side wall and the second side wall and connected by riveting.

[0013] Furthermore, a side wall lower flange is provided in the web area of ​​the side wall lower side beam, and a bottom frame lower flange is provided in the web area of ​​the bottom frame side beam. The side wall lower flange and the bottom frame lower flange are kept in the same plane, providing an installation interface for the under-vehicle equipment.

[0014] Furthermore, the main part of the roof is welded by roof side beams and dome panels, end sealing plates are provided at the ends of the roof, symmetrically distributed air-conditioning installation beams are provided in the air-conditioning area to form an air-conditioning installation frame, and the variable-section area of ​​the roof panel is transitioned through the sealing plates; the roof is overlapped on the side wall upper beams through the roof side beams and fixed by riveting.

[0015] The body structure of the lightweight straddle-type articulated monorail vehicle of the present invention also has an end wall located at the second end, wherein the main part of the end wall is an aluminum plate and is provided with a through-platform opening to provide a mounting surface for the through-passage; a reinforcing beam is welded on the upper part of the aluminum plate, and a glue groove is provided on the aluminum plate for gluing and sealing after riveting the side wall.

[0016] In addition, the present invention also claims protection for a lightweight straddle-type articulated monorail vehicle, which is characterized by having the aforementioned vehicle body structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The overall structure is simple, the utilization rate of the space under the vehicle is high, and it is easy to avoid the bogie and tire area. The modularity of each component is high, and each component has good production independence and universal interchangeability. The number of parts of each component is small, and the degree of welding automation is high, which is conducive to improving production efficiency.

[0018] 2. The coupler seat, traction rod seat, driver's cab and other parts are made of carbon steel structure. Through multi-point riveting, the force is evenly distributed and transmitted to the chassis floor. The rest of the main structure is hollow aluminum alloy profiles, which further reduces the weight of the vehicle body, is beneficial to product quality control and vehicle weight reduction, and takes into account both lightweight and high strength requirements.

[0019] 3. The various parts of the vehicle body adopt riveted structure to reduce the difficulty of production and realize green production and assembly.

[0020] 4. The driver's cab frame of the present invention is semi-open and occupies little space. While meeting the collision requirements, it provides an installation interface for the driver's cab mask and has little impact on the shape of the driver's cab. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of a vehicle body structure according to an embodiment of the present invention: Figure 2 yes Figure 1 A partial enlarged view of the center: Figure 3 : is a schematic diagram of the underframe structure of a vehicle body structure according to an embodiment of the present invention: Figure 4 yes Figure 3 A partial enlarged view of point C in the middle: Figure 5 This is the bottom view of the chassis structure: Figure 6 This is a schematic diagram of the side wall structure in the vehicle body structure according to an embodiment of the present invention: Figure 7 yes Figure 6 A partial enlarged view of point B in the middle.

[0023] Figure 8 It is a schematic diagram of the roof structure in the vehicle body structure according to an embodiment of the present invention.

[0024] Fig. 9 It is a schematic diagram of the end wall structure of the vehicle body structure according to an embodiment of the present invention.

[0025] Fig.10 It is a schematic diagram of the driver's cab structure in the vehicle body structure of an embodiment of the present invention.

[0026] Fig.11 This is a schematic diagram of the position relationship between the driver's cab, chassis and side walls: Fig.12 This is a schematic diagram of the main structure section of the vehicle body: Fig.13 yes Fig.12 A partial enlarged view of point F in the middle: Fig.14 yes Fig.12 A partial enlarged view of the G in the middle: The icon numbers are as follows: 1. chassis; 2. first side wall; 3. second side wall; 4. roof; 5. end wall; 6. driver's cab; 11. chassis side beam; 111. chassis lower flange; 12. chassis floor; 13. coupler mounting seat; 14. first end bogie wheel well frame; 15. articulated bogie mounting frame; 16. bogie spring mounting seat; 17. second end bogie wheel well frame; 18. chassis small side beam; 19. chassis end beam; 110. bogie traction rod seat; 21. door column; 22. side wall end column; 23. side wall upper beam; 24. side wall lower beam; 2 41. Lower flange of side wall; 26. Window installation interface; 27. Interface for interior seats; 28. Door installation interface; 29. ​​External unlocking installation interface; 31. End sealing plate; 32. Roof side beam; 33. Air conditioning installation beam; 34 sealing plate; 35. Dome plate; 36 Air conditioning installation seat; 41 aluminum plate; 42. Reinforcement beam; 43. Glue groove; 44. Through-hole; 51. Driver's cab end beam; 52. Bending reinforcement longitudinal beam; 53. Airtight wall; 54. Driver's cab side beam; 55. Bending reinforcement cross beam; 01. Transition connecting plate; 03. Driver's cab mask installation seat. DETAILED DESCRIPTION

[0027] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0028] Figure 1 The body structure of an articulated straddle monorail vehicle shown in the figure is composed of a chassis 1, a first side wall 2, a second side wall 3, a roof 4, an end wall 5 and a driver's cab 6. The first side wall 2 and the second side wall 3 are symmetrically distributed on both sides of the vehicle with respect to the center of the vehicle and are connected to the chassis by rivets. The driver's cab 6 and the end wall 5 are distributed at the first end and the second end of the vehicle, and the roof 4 and the chassis 1 are placed at the top and the bottom respectively. Each component is fixed by riveting to form a vehicle body frame. In the exposed area, the structure is provided with a glue groove for sealing the vehicle body with structural glue to prevent water from entering from the outside. The chassis 1 is provided with a coupler mounting seat 13, a chassis end beam 19, a first end bogie wheel well frame 14, a chassis floor 12 and a chassis side beam 11, and a second end bogie wheel well frame 17 in sequence from the first end to the second end. The concentrated load-bearing area of ​​the underframe 1 is welded from the underframe side beam 11 and the underframe floor 12 of aluminum profiles. The concentrated load-bearing parts of the underframe 1 are welded from high-strength alloy steel. The concentrated load-bearing parts of the underframe 1 include: a coupler mounting seat 13, a first-end bogie wheel well frame 14 and a second-end bogie wheel well frame 17.

[0029] like Figure 2 ,11 As shown, the cab 6 is above the chassis 1, the cab side beam 54 is welded to the chassis small side beam 18, and the transition connecting plate 01 connects the cab side beam 54, the chassis small side beam 18, the side wall lower side beam 24 and the side wall end column 22, and is connected by rivets to locally reinforce the structure. The end wall 5 is overlapped on the roof 4, the side walls 2, 3 and the chassis, and the components are connected by riveting.

[0030] The car body transmits the traction force of the bogie to the car body frame floor 12 through the bogie traction rod seat 110, thereby driving the whole vehicle to move. The traction force is transmitted to the subsequent trailer through the articulated bogie mounting frame 15 to realize the movement of the marshaled vehicle. The bogie spring mounting seat 16 is connected to the frame side beam 11 and the side wall lower side beam 24 by bolts to bear the vertical load of the whole vehicle. The first end bogie wheel well frame 14 and the second end bogie wheel well frame 17 form a wheel well space to provide sufficient movement space for the bogie.

[0031] In order to ensure that the chassis 1 is lightweight and has high load-bearing capacity, the chassis side beam 11 and the aluminum profile floor 12 are welded in the non-concentrated load-bearing area of ​​the chassis 1. The chassis side beam 11 is T-shaped and is provided with a flange riveted to the side wall and a flange for supporting equipment under the vehicle. In the concentrated load-bearing parts such as the hook mounting seat 13 and the articulated bogie mounting frame 15, high-strength alloy steel is selected for welding. For the parts with particularly complex shapes, cast steel parts are selected and welded together with high-strength alloy steel. The hook mounting seat 13 is a symmetrically distributed triangular box structure with reinforcing ribs inside. The middle is a hook mounting plate connecting the triangular box structures on both sides, and the mounting seat structure is welded by high-strength alloy steel. The first-end bogie wheel well frame 14 is welded by 3 pieces of Japanese-shaped aluminum alloy profiles. To ensure the strength of the frame, oblique ribs are provided inside the profile. The first-end bogie wheel well frame 14 is connected to the chassis floor 12 by welding. The bogie spring mounting seat 16 is a rigid strength cast steel part to ensure that it has sufficient impact resistance and strength. It is connected to the chassis 1 by bolts, and the later maintenance and renovation are quick and convenient. The bogie wheel well frame 17 is welded from alloy steel plates and bent parts, and the articulated bogie mounting frame 15 is a welded structure of alloy steel plate beams and cast steel parts. After the two are connected by welding, they are riveted to the floor 12 by rivets. By increasing the riveting points, it is ensured that the load in the bogie area is smoothly transferred to the floor 12, and the overall structure is loaded.

[0032] like Figure 6As shown, in order to ensure the modality and strength of the whole vehicle, the side walls 2 and 3 are each provided with two door columns 21 and two side wall end columns 22. The door column 21 is welded with the side wall upper beam 23 and the side wall lower beam 24 to form a door frame structure, providing a door installation interface. Due to the thickness of the door column and the design of the internal rib plate, the door frame structure has sufficient strength. The lower web area of ​​the side wall lower beam 24 is provided with a side wall lower flange 241, and the web area of ​​the bottom frame side beam 11 is provided with a bottom frame lower flange 111. The side wall lower flange 241 and the bottom frame lower flange 111 maintain the same plane, providing a mounting plane for the undercarriage equipment, ensuring that the equipment has sufficient safety redundancy.

[0033] like Figure 8 As shown, the roof is welded by roof side beams 32 and dome panels 35, with end sealing panels 31 provided at the ends, and symmetrically distributed air conditioning installation beams 33 provided in the air conditioning area to form an air conditioning installation frame. The roof panel variable cross-section area is transitioned by a sealing panel 34.

[0034] like Fig. 9 As shown, in order to achieve maximum lightness, the end wall is an aluminum plate 41. In order to improve the rigidity, a reinforcement beam 42 is welded on the upper part of the end wall to improve the rigidity of the end wall and prevent the end wall from being plastically deformed by the through-passage load. A glue groove 43 is provided on the end wall for gluing and sealing after riveting the side wall.

[0035] like Fig.10 As shown, the cab end beam 51, the airtight wall 53 and the cab side beam 54 constitute the cab frame, which is welded from Japanese-shaped aluminum alloy profiles. A bent reinforcing longitudinal beam 52 and a bent reinforcing cross beam 55 are added inside the frame to ensure the strength of the skeleton and meet the strength requirements of the cab while providing a bonding installation surface for the interior floor.

[0036] like Fig.13 As shown, the roof is overlapped on the side wall side beam 23 through the roof side beam 32 and fixed by riveting. Fig.14 As shown, the frame side beam 11 is flanged and overlapped on the side wall bottom beam 24 and connected by rivets.

[0037] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle body structure of a lightweight straddle-type articulated monorail vehicle, comprising a chassis (1), side walls (2, 3) and a roof (4), wherein the chassis (1) is welded together by a chassis floor (12) and chassis side beams (11), and is characterized in that: The chassis (1) is provided with a coupler mounting seat (13), a chassis end beam (19), a first-end bogie wheel well frame (14), a chassis floor (12) and a chassis side beam (11), and a second-end bogie wheel well frame (17) in sequence from the first end to the second end, wherein: The coupler mounting seat (13) is a symmetrically distributed box structure, wherein the middle portion has a coupler mounting plate for fixing the coupler, and the rear end surface of the coupler mounting seat (13) is riveted and fixed to the chassis end beam (19), so that the longitudinal force applied to the coupler mounting seat (13) is transmitted to the chassis floor (12) through the chassis end beam (19); A first-end bogie wheel well frame (14) is welded from aluminum alloy profiles and fixed to the chassis floor (12) by welding or riveting; The wheel well frame (17) of the second end bogie is welded from alloy steel plates and bent parts, and the articulated bogie mounting frame (15) is a welded structure of alloy steel plate beams and cast steel parts. The two are connected by welding and then riveted to the chassis floor (12) by rivets, so that the load in the bogie area is stably transmitted to the chassis floor (12); The lower part of the side walls (2, 3) has a side wall bottom beam (24); the chassis side beam (11) is overlapped on the side wall bottom beam (24) and fixed by rivets; the steering frame spring mounting seat (16) is connected to the chassis side beam (11) and the side wall bottom beam (24) by bolts to bear the vertical load of the whole vehicle; A bogie traction rod seat (110) is provided at the bottom of the chassis floor (12) near a first-end bogie wheel well frame (14). The vehicle body transmits the bogie traction force to the vehicle body chassis floor (12) through the bogie traction rod seat (110), thereby driving the entire vehicle to move. The traction force is transmitted to the subsequent towing vehicle through the articulated bogie mounting frame (15), thereby realizing the movement of the train assembly.

2. The vehicle body structure of the lightweight straddle-type articulated monorail vehicle according to claim 1, characterized in that: A driver's cab (6) is fixed above one end of the chassis floor (12), the driver's cab (6) comprising a driver's cab frame composed of a driver's cab end beam (51), an airtight wall (53) and a driver's cab side beam (54), small chassis side beams (18) welded to the sides of the chassis side beam (11) are arranged on both sides of one end of the chassis (1), the side walls (2, 3) have door columns (21) and side wall end columns (22), the driver's cab side beam (54) falls on the small chassis side beam (18) and is fixed by welding, and the driver's cab side beam (54), the chassis small side beam (18), the side wall lower side beam (24) and the side wall end column (22) are riveted and fixed by a transition connecting plate (01), thereby locally reinforcing the structure.

3. The vehicle body structure of the lightweight straddle-type articulated monorail vehicle according to claim 1, characterized in that: The concentrated load-bearing area of ​​the chassis (1) is welded from chassis side beams (11) and chassis floors (12) made of aluminum profiles, and the concentrated load-bearing parts of the chassis (1) are welded from high-strength alloy steel. The concentrated load-bearing parts of the chassis (1) include: the coupler mounting seat (13), a first-end bogie wheel well frame (14), and a second-end bogie wheel well frame (17).

4. The vehicle body structure of the lightweight straddle-type articulated monorail vehicle according to claim 1, characterized in that: The side walls (2, 3) comprise a first side wall (2) and a second side wall (3), wherein the first side wall (2) and the second side wall (3) are symmetrically distributed on both sides about a center line of the vehicle, and the roof (4) is overlapped on the first side wall (2) and the second side wall (3) and connected by riveting.

5. The vehicle body structure of the lightweight straddle-type articulated monorail vehicle according to claim 1, characterized in that: The side wall lower side beam (24) is provided with a side wall lower flange (241) in the web region, and the bottom frame side beam (11) is provided with a bottom frame lower flange (111) in the web region. The side wall lower flange (241) and the bottom frame lower flange (111) are kept in the same plane, thereby providing an installation interface for under-vehicle equipment.

6. The vehicle body structure of the lightweight straddle-type articulated monorail vehicle according to claim 1, characterized in that: The main part of the vehicle roof (3) is formed by welding a vehicle roof side beam (32) and a dome plate (35); an end sealing plate (31) is provided at the end of the vehicle roof (3); symmetrically distributed air conditioning installation beams (33) are provided in the air conditioning area to form an air conditioning installation frame; the variable cross-section area of ​​the vehicle roof plate is transitioned through the sealing plate (34); the vehicle roof (4) is overlapped on the side wall upper beam (23) through the vehicle roof side beam (32) and fixed by riveting.

7. The vehicle body structure of the lightweight straddle-type articulated monorail vehicle according to claim 1, characterized in that: It also has an end wall (5) located at the second end, the main part of the end wall (5) is an aluminum plate (41) and is provided with a through-hole (44) to provide a mounting surface for the through-hole; a reinforcing beam (42) is welded on the upper part of the aluminum plate (41), and a glue groove (43) is provided on the aluminum plate (41) for gluing and sealing after riveting the side wall.

8. The vehicle body structure of the lightweight straddle-type articulated monorail vehicle according to claim 1, characterized in that: The inner side and upper part of the side walls (2, 3) provide installation interfaces for in-vehicle wire ducts, the lower part of the side walls (2, 3) provides installation interfaces for seats, and rain canopies are arranged on the outer side of the side walls (2, 3).

9. The vehicle body structure of the lightweight straddle-type articulated monorail vehicle according to claim 1, characterized in that: The side walls (2, 3) further comprise a side wall upper beam (23), a window installation interface (26), an interior seat interface (27), a door installation interface (28), and an exterior unlocking installation interface (29).

10. A lightweight straddle-type articulated monorail vehicle, characterized in that: A vehicle body structure as claimed in any one of claims 1 to 8.

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