A full load type bus and a special-shaped support beam of a middle aisle thereof

Abstract

The utility model relates to a passenger car technical field especially, a kind of full bearing type passenger car and the special-shaped support beam of middle aisle in it. The special-shaped support beam of middle aisle of the passenger car of the utility model includes beam body, the both ends of beam body have the fixed end for being fixedly connected with car frame longitudinal beam, the top surface of the beam body has the lower concave pipeline laying groove with upward opening to be directly laid in for pipeline, the lower concave pipeline laying groove is equipped with two and is arranged in the length direction of the beam body interval, the top surface on the beam body side of the lower concave pipeline laying groove constitutes the fixed support surface for supporting and fixing aisle floor. The special-shaped support beam of middle aisle of the utility model solves the problem that pipeline is arranged between floor support crossbeam and luggage compartment top crossbeam in prior art, leading to threading inconvenience, relatively low efficiency, pipeline is vulnerable to damage.

Description

Technical Field

[0001] The utility model relates to the technical field of passenger buses, in particular to a full-load-bearing passenger bus and a special-shaped support beam for the middle aisle thereof. Background Art

[0002] In the interior of a full-load-bearing passenger bus, there is a middle aisle extending forward and backward for passengers to walk. On both sides of the middle aisle, there are seat steps, and passenger seats are fixed on the seat steps. The middle aisle and the seat steps are both built by the vehicle body frame. Specifically, in the middle of the vehicle body frame, there are longitudinally arranged frame longitudinal beams spaced left and right. At the bottom position between the two frame longitudinal beams, a plurality of luggage compartment middle support beams are fixedly connected at intervals in the front and rear directions. At the top of the two frame longitudinal beams, step skeletons are respectively connected to the opposite sides. Between the two frame longitudinal beams, a plurality of middle aisle support beams are fixedly connected at intervals in the front and rear directions between the top and the bottom of the frame longitudinal beams. The middle aisle floor is laid on the middle aisle support beams. In a full-load-bearing passenger bus, various pipelines need to be arranged from the head of the bus to the tail, such as water pipes, electric wires, brake air pipes, steering oil pipes, and fuel pipes, etc., to meet the various requirements of the bus for hydraulic pressure, electricity, and water heating, etc. In current passenger buses, most of these pipelines are arranged between the middle aisle support beams and the luggage compartment middle support beams.

[0003] For example, a support cross beam for a vehicle aisle floor and a vehicle frame disclosed in the Chinese utility model patent with the authorization announcement number CN221188425U. The support cross beam for the vehicle aisle floor includes a cross beam body and connecting parts provided at opposite ends of the cross beam body. The cross beam body is welded and connected to the vehicle frame aisle longitudinal beam through the connecting parts. The cross beam body includes a top wall and side walls provided on opposite sides of the top wall. The side walls include a horizontal section and a vertical section connected perpendicularly. The whole cross beam body is in a "U" shape. The top wall is used to connect with the aisle floor, and the vertical section is used to connect the horizontal section and the top wall. A plurality of tie strap mounting holes are arranged at intervals along the extending direction of the cross beam on the horizontal section, and are used to fix the pipeline to the cross beam by passing a tie strap through adjacent two tie strap mounting holes.

[0004] In the aforementioned existing technology, securing pipelines to the bottom of the crossbeam and the top panel of the luggage compartment using cable ties can reduce the number of assembly parts and lower costs. However, during actual installation, the pipeline must first pass through the entire vehicle body or part of it to reach the predetermined position before it can be secured to the crossbeam with cable ties. During this process, the pipeline needs to be threaded through the space between the supporting crossbeam and the luggage compartment crossbeam. For pipelines with multiple branches, large wiring harnesses, or those with limited dimensions, installation in a confined space by pulling and threading results in significant friction between the pipeline and the frame, easily causing frictional damage. This installation process is time-consuming and inefficient. Furthermore, pulling on pipelines with multiple branches can cause the branches to become stuck in the frame, damaging the pipeline and posing a safety hazard. Utility Model Content

[0005] The purpose of this utility model is to provide a fully load-bearing bus to solve the problems in the prior art where the bus pipeline is arranged between the floor support beam and the luggage compartment top beam, which leads to inconvenience in wiring, low efficiency, and easy damage to the pipeline.

[0006] The purpose of this utility model is to provide an irregularly shaped support beam for the central aisle of a fully load-bearing bus, so as to solve the problem that pipelines are easily damaged during the installation process relative to the frame in the prior art, resulting in low installation efficiency and high installation cost of the frame pipelines.

[0007] To solve the above problems, the fully load-bearing bus of this utility model adopts the following technical solution:

[0008] The fully load-bearing bus includes a frame, which includes a pair of left and right longitudinal beams. Multiple central support beams for the luggage compartment, spaced apart in the longitudinal direction, are fixedly connected at the bottom between the two longitudinal beams. Step frames are connected to the top of the two longitudinal beams on opposite sides. Multiple central aisle support beams, spaced apart in the longitudinal direction, are fixedly connected between the top and bottom of the two longitudinal beams. A central aisle floor is laid on the central aisle support beams. Each central aisle support beam includes a beam body with fixed ends for fixed connection to the longitudinal beams. The top surface of the beam body has an upward-opening recessed pipe laying groove for direct pipe laying. Two recessed pipe laying grooves are provided and spaced apart along the length of the beam body. The top surfaces of the beam body on both sides of the recessed pipe laying grooves form fixed support surfaces for supporting and fixing the aisle floor. Pipes extending longitudinally are installed between the central aisle floor and the central support beams for the luggage compartment.

[0009] Furthermore, the bottom surface of the beam has a downward-opening concave pipe laying groove to form a pipe passage between it and the central support beam of the luggage compartment. The pipe passage and the concave pipe laying groove are arranged vertically to separate the pipes within them into vertical layers. The pipe passage is used for pipes subject to vibration to pass through so that they are kept away from the aisle floor.

[0010] Furthermore, the beam body has an extension edge extending perpendicular to the length direction of the beam body at least at the bottom of the concave pipeline laying groove and the upper concave pipeline laying groove, and the extension edge is provided with a pipeline fixing structure for fixing cable clips or pipeline ties.

[0011] Furthermore, the extension sides corresponding to the concave pipeline paving groove and the convex pipeline paving groove extend to both sides of the beam body, so as to fix the pipelines in the concave pipeline paving groove and the convex pipeline paving groove respectively through the two extension sides.

[0012] Furthermore, the upper extension edge extends from one end edge of the beam body along the top edge to the other end edge, and the horizontal extension edges on both sides of the recessed pipeline paving groove on the beam body constitute the fixed support surface.

[0013] Furthermore, at both ends of the beam, corresponding to the position of the recessed pipeline paving groove, there are upper protruding sections extending outward in the length direction of the beam. The horizontally extending edge at the bottom of the upper protruding section forms an upper lap surface for lap welding with the longitudinal beam of the vehicle frame.

[0014] Furthermore, the extended edge on the lower side extends along the bottom edge of the beam, and both ends of the beam are respectively provided with a lower protruding section extending outward in the length direction of the beam at the position corresponding to the upper concave pipeline paving groove. The horizontal extending edge at the bottom of the lower protruding section forms a lower lap surface for lap welding with the longitudinal beam of the frame.

[0015] Furthermore, the beam body has an extension side extending perpendicular to the length direction of the beam body at least at the bottom of the recessed pipeline laying groove, and the extension side is provided with a pipeline fixing structure for fixing cable clips or pipeline ties.

[0016] This utility model of a fully load-bearing bus improves upon existing buses by employing a new irregularly shaped support beam in the central aisle. An open, recessed cable tray with an upward-facing opening is installed at the top of the beam. This open design facilitates cable installation; during installation, workers can easily lay the cables directly into the tray from top to bottom before installing the aisle floor. This simplified installation process saves time and labor, improving worker efficiency. Furthermore, directly placing the cables into the recessed tray avoids friction and abrasion between the cables and the vehicle frame during traditional cable threading processes, ensuring cable integrity and reducing safety risks.

[0017] To solve the above problems, the irregularly shaped support beam for the central aisle of the fully load-bearing bus of this utility model adopts the following technical solution:

[0018] The irregular support beam of the central aisle of the fully load-bearing bus includes a beam body. Both ends of the beam body have fixed ends for fixed connection with the longitudinal beams of the vehicle frame. The top surface of the beam body has an upward-opening recessed pipeline laying groove for pipelines to be laid directly inside. There are two recessed pipeline laying grooves, which are spaced apart along the length of the beam body. The top surfaces of the beam body on both sides of the recessed pipeline laying grooves constitute a fixed support surface for supporting and fixing the aisle floor.

[0019] Furthermore, the bottom surface of the beam has a downward-opening concave pipe laying groove to form a pipe passage between it and the central support beam of the luggage compartment. The pipe passage and the concave pipe laying groove are arranged vertically to separate the pipes within them into vertical layers. The pipe passage is used for pipes subject to vibration to pass through so that they are kept away from the aisle floor.

[0020] Furthermore, the beam body has an extension edge extending perpendicular to the length direction of the beam body at least at the bottom of the concave pipeline laying groove and the upper concave pipeline laying groove, and the extension edge is provided with a pipeline fixing structure for fixing cable clips or pipeline ties.

[0021] Furthermore, the extension sides corresponding to the concave pipeline paving groove and the convex pipeline paving groove extend to both sides of the beam body, so as to fix the pipelines in the concave pipeline paving groove and the convex pipeline paving groove respectively through the two extension sides.

[0022] Furthermore, the upper extension edge extends from one end edge of the beam body along the top edge to the other end edge, and the horizontal extension edges on both sides of the recessed pipeline paving groove on the beam body constitute the fixed support surface.

[0023] Furthermore, at both ends of the beam, corresponding to the position of the recessed pipeline paving groove, there are upper protruding sections extending outward in the length direction of the beam. The horizontally extending edge at the bottom of the upper protruding section forms an upper lap surface for lap welding with the longitudinal beam of the vehicle frame.

[0024] Furthermore, the extended edge on the lower side extends along the bottom edge of the beam, and both ends of the beam are respectively provided with a lower protruding section extending outward in the length direction of the beam at the position corresponding to the upper concave pipeline paving groove. The horizontal extending edge at the bottom of the lower protruding section forms a lower lap surface for lap welding with the longitudinal beam of the frame.

[0025] Furthermore, the beam body has an extension side extending perpendicular to the length direction of the beam body at least at the bottom of the recessed pipeline laying groove, and the extension side is provided with a pipeline fixing structure for fixing cable clips or pipeline ties.

[0026] This invention, a pioneering creation, features a uniquely shaped support beam for the central aisle of a fully load-bearing bus. The top of the beam has an open, upward-facing recessed cable tray. This open design facilitates cable installation; workers can easily lay the cables directly into the tray from top to bottom before installing the aisle floor. This simplified installation process saves time and effort, increasing worker efficiency. Furthermore, directly placing the cables into the recessed tray avoids friction and abrasion between the cables and the vehicle frame during conventional cable threading processes, ensuring cable integrity and reducing safety risks. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of one embodiment of the irregular support beam for the central aisle of a fully load-bearing bus according to this utility model;

[0028] Figure 2 for Figure 1 The front view of the structure shown;

[0029] Figure 3 for Figure 2 Schematic diagram of the cross section at point AA;

[0030] Figure 4 This is a schematic diagram showing the cooperation between the irregularly shaped support beam of the central aisle of the fully load-bearing bus of this utility model and the longitudinal beams of the frame, pipelines, aisle floor and central support beam of the luggage compartment;

[0031] Figure 5 This is a schematic diagram of another embodiment of the irregular support beam for the central aisle of the fully load-bearing bus according to this utility model.

[0032] In the diagram: 10. Beam; 11. Fixed end; 12. Recessed pipeline installation groove; 13. Upper extension edge; 130. Support plate; 131. Fixed support surface; 14. Recessed pipeline installation groove; 15. Lower extension edge; 151. Lower protruding section; 1511. Lower side overlapping surface; 16. Side extension edge; 161. Upper protruding section; 1611. Upper side overlapping surface; 17. Pipeline fixing structure; 20. Passage floor; 30. Frame longitudinal beam; 40. Luggage compartment central support beam; 41. Pipe passage. Detailed Implementation

[0033] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0034] By replacing the strip floor beams supporting the aisle floor in the fully load-bearing bus frame with "mountain"-shaped aisle support beams featuring open, upward-facing cable trays, the installation process can be simplified by directly placing larger, more complex, or multi-branched cables into the open trays from top to bottom, even before the aisle floor is installed. This improves installation efficiency and eliminates the need for pulling and dragging during installation, thus reducing the risk of cable damage from the frame.

[0035] Based on the main concepts above, different implementation methods are provided below for illustration.

[0036] The implementation method of this utility model of a fully load-bearing bus is as follows:

[0037] In a typical scheme, refer to Figure 1-4 As shown, the fully load-bearing bus includes a fully load-bearing bus frame with an integral structure. The frame has an aisle frame for passenger movement, and a luggage compartment frame for storing passenger luggage is formed at the bottom of the frame. An aisle floor 20 is installed at the aisle frame. The aisle frame includes a central aisle support beam at the bottom of the aisle floor 20 to support it; this is the irregularly shaped support beam for the central aisle of the fully load-bearing bus. The luggage compartment frame includes a central luggage compartment support beam 40 connected to the top surface of the luggage compartment. Frame longitudinal beams 30 are installed on the left and right sides of the aisle. The frame longitudinal beams 30 have a certain height and can form steps higher than the aisle floor 20 with the step frame. Seats for passengers are installed on these steps. The left and right ends of the central aisle support beam have fixed ends 11 welded to the frame longitudinal beams 30.

[0038] The passenger car's central aisle support beam includes a beam body 10. Two parallel, open, recessed cable trays 12 are formed on the top of the beam body 10 facing the bottom of the passenger car. Fixed support surfaces 131 are formed on the top surfaces of the beam body 10 on opposite sides of the recessed cable trays 12, supporting and fixedly connected to the aisle floor 20. The recessed cable trays 12 accommodate brake air pipes, electrical cables, and water pipes within the passenger car. Three parallel, upward-facing cable trays 14 are formed on the bottom of the central aisle support beam facing the top of the vehicle frame. The upward-facing cable trays 14 accommodate the passenger car's steering oil pipes and fuel oil pipes. In this embodiment, the passenger car's brake air pipes, electrical cables, and water pipes are installed within the recessed cable trays 12. Because the brake air pipes, electrical cables, and water pipes need to branch out to multiple different locations within the workshop, a threaded installation method is not convenient. Meanwhile, the water pipes are also wrapped with insulation cotton, resulting in a larger pipe radius and making threaded installation difficult. Therefore, these difficult-to-install pipes are placed in the recessed pipe laying groove 12 on the upper layer of the passenger bus's central aisle support beam. The bus's steering oil pipes and fuel oil pipes are placed in the upper recessed pipe laying groove 14 located on the lower layer of the passenger bus's central aisle support beam. This is because these pipes have few or no branches and a relatively smooth outer surface, making them easy to thread and install. Therefore, these pipes are placed in the upper recessed pipe laying groove 14. Furthermore, the steering oil pipes generate and transmit vibrations during bus operation, so they need to be placed in the upper recessed pipe laying groove 14 to prevent vibrations from being transmitted to the aisle floor 20, thus reducing the impact on passengers.

[0039] At the bottom of the recessed pipeline installation groove 12 on the support beam 10 of the passenger vehicle's central aisle, there is an upper extension edge 13 extending perpendicular to the length of the support beam. Multiple converging grooves are spaced apart along the length of the beam 10 on the upper extension edge 13. Workers can install cable ties between adjacent converging grooves to secure the pipelines, thus fixing them to the upper extension edge 13 and accommodating and fixing them within the recessed pipeline installation groove 12. The converging grooves are opened from the side of the upper extension edge 13 away from the beam 10 and narrow at the opening, making the distance between the opposite sides of the groove opening width direction closer than the distance between the opposite sides of the groove body width direction. This creates a narrower outer and wider inner converging groove, preventing the cable ties from coming loose after securing the pipelines and improving the stability of the pipeline fixation. The upper extension edge 13 extends along the upper edge of the beam 10 to both sides in the length direction of the beam 10. When the upper extension edge 13 extends to the top surface of the beam 10 on both sides of the recessed pipeline paving groove 12, it can form a fixed support surface 131 for supporting and fixing the passageway floor 20.

[0040] At the bottom of the recessed pipeline paving groove 14 on the beam 10, a lower extension edge 15 extending perpendicularly to the length direction of the passenger car central aisle support beam is provided. A circular hole is provided on the lower extension edge 15. After workers fix the pipeline with wire clips, they fix the side of the wire clip facing away from the pipeline to the circular hole of the lower extension edge 15, thus accommodating and fixing the pipeline within the recessed pipeline paving groove 14. Fixing the pipeline within the recessed pipeline paving groove 14 with wire clips facilitates the installation and fixing of the lower pipeline, making the pipeline fixing process convenient and quick. At the bottom of the left and right sides of the beam 10, lower protruding sections 151 extending outward along the length direction of the beam 10 are respectively provided. The lower extension edge 15 extends along the lower edge of the beam 10 to both sides, reaching the lower protruding section 151 to form a lower lap surface 1511 for lap welding with the longitudinal beam 30 of the vehicle frame. In this embodiment, the upper extension edge 13 and the lower extension edge 15 extend toward the front and rear sides of the beam body 10, respectively. That is, the upper extension edge 13 and the lower extension edge 15 are arranged one in front of the other on the beam body 10, so that the lateral cross section of the passenger car middle passage support beam is "Z" shaped.

[0041] On the left and right sides of the beam 10, there are upper protruding sections 161 extending outward along the length of the beam 10. On the left and right sides of the beam 10, there are also side extension edges 16. When the side extension edges 16 extend to the upper protruding sections 161 and completely surround the upper protruding sections 161, they can form an upper lap surface 1611 at the bottom of the upper protruding sections 161 for welding and fixing with the longitudinal beams 30 of the frame.

[0042] In the actual assembly process of this embodiment, the central aisle support beam of the bus is first welded to the longitudinal beam 30 of the frame. Then, the steering oil pipe and fuel pipe are pulled and threaded between the central aisle support beam and the central support beam 40 of the luggage compartment and placed in the upper concave pipeline installation groove 14, and fixed to the round hole of the lower extension side 15 with wire clips. Then, the water pipe, brake air pipe and electrical wire are placed directly into the lower concave pipeline installation groove 12 from top to bottom, and the pipelines are fixed to the closing groove provided on the upper extension side 13 with cable ties. Then, the aisle floor 20 is installed in the aisle and fixedly connected to the fixed support surface 131 of the upper extension side 13 by nailing. In the fully load-bearing bus with the above structure, the central aisle support beam of the bus can support and fix the aisle floor 20, ensuring the stability and safety of passengers walking on the floor. On the other hand, the open-type recessed pipeline installation groove 12 allows for convenient and quick installation and fixation of water pipes, brake air pipes, and electrical wires with many plugs, branches, and large dimensions. Steering oil pipes and fuel pipes, which are easy to install, have few or no branches, and can transmit vibrations, are placed in the upper recessed pipeline installation groove 14. This layered pipeline arrangement optimizes the pipeline installation process, improves installation efficiency, and saves installation time. It also avoids friction and scratches between the pipelines and the vehicle frame during installation, ensuring the integrity of the pipelines and reducing safety risks. Furthermore, it prevents pipeline vibrations from being transmitted to the aisle floor 20, thus avoiding any impact on the vehicle's NVH (noise, vibration, and harshness).

[0043] Among them, the monocoque bus frame is an advanced bus frame structure technology. It adopts an integrated frame structure, combining the body and frame into one. The various parts of the monocoque bus frame are tightly connected by welding and other methods to form a cage-like overall frame. The monocoque bus frame does not have a traditional independent frame and body; it bears all the loads, including passenger weight, luggage weight, and various forces during vehicle operation.

[0044] For details, please refer to Figure 4 It can form a pipe passage 41 between the recessed pipeline laying groove 12 and the middle support beam 40 of the luggage compartment, so that the corresponding pipeline can pass through the pipe passage 41 more easily, and finally complete the connection and fixation between the pipeline and the recessed pipeline laying groove 12.

[0045] In another embodiment of this scheme, the upper extension edge 13 and the lower extension edge 15 are arranged in the same direction, that is, both are arranged towards the front or rear side of the beam 10, so that the lateral cross-section of the bus middle aisle support beam is "C" shaped. Alternatively, in another embodiment, the upper extension edge 13 and the lower extension edge 15 extend from opposite sides of the beam 10, so that the lateral cross-section of the bus middle aisle support beam is "I" shaped.

[0046] In the above embodiment, while providing the upper overlapping surface 1611, a lower overlapping surface 1511 is also provided at the bottom of the left and right ends of the lower extension edge 15, which can increase the fixing area of ​​the bus middle aisle support beam and the frame longitudinal beam 30, thereby enhancing the welding area of ​​the bus middle aisle support beam and the frame longitudinal beam 30.

[0047] In another embodiment, the side extension 16 is perpendicularly connected to the upper extension 13, and the entire side extension 16 forms an upper lap surface 1611. To weld and fix the upper lap surface 1611 to the longitudinal beam 30 of the vehicle frame, the fixed support surfaces 131 located on both sides of the passenger car's central aisle support beam need to be extended in the width direction. This increases the area of ​​the fixed support surfaces 131, thereby increasing the load-bearing capacity of the passenger car's central aisle support beam on the aisle floor 20. In this embodiment, the lower lap surface 1511 may not be provided on the lower extension 15.

[0048] In a preferred embodiment, reference Figure 2 Two recessed pipeline paving grooves 12 are symmetrically arranged along the length of the beam 10 so that the fixed support surface 131 is evenly distributed along the length of the beam 10, making the support effect of the bus middle aisle support beam on the aisle floor 20 more uniform and stable.

[0049] In a preferred embodiment, reference Figure 1 Three downward-opening recessed pipeline installation grooves 14 are provided on the beam body 10, facing the top of the beam body 10, to separate and install different types of pipelines. In another embodiment, one recessed pipeline installation groove 14 can be provided at the bottom of the passenger car central aisle support beam, and all lower-level pipelines can be installed in the same recessed pipeline installation groove 14. Alternatively, two recessed pipeline installation grooves 14 can be provided, dividing the lower-level pipelines into two parts and installing them in the two recessed pipeline installation grooves 14. Or more than three recessed pipeline installation grooves 14 can be provided to separate the corresponding lower-level pipelines.

[0050] In a preferred embodiment of this implementation, reference is made to Figure 1Multiple closing grooves are provided at intervals along the length of the beam 10 at the bottom of the recessed pipeline laying groove 12 on the upper extension edge 13. These closing grooves facilitate the installation of cable ties, allowing them to be directly slipped in without needing to be threaded through. The closing design also prevents the cable ties from slipping out of the grooves after the pipeline is secured. In another embodiment, multiple hole-shaped structures, such as round or square holes, are provided at the bottom of the recessed pipeline laying groove 12 on the upper extension edge 13. When the cable tie is installed in a round hole, the circular structure of the inner ring of the round hole prevents it from being cut or damaged. When the cable tie is installed in a square hole, the straight structure of the inner ring of the square hole makes it less likely for the cable tie to move relative to the square hole. In another embodiment, multiple through grooves are provided at intervals along the length of the beam 10 at the bottom of the recessed pipeline laying groove 12 on the upper extension edge 13. Each through groove is a groove with equal distances between its opposite sides, opening on the side of the upper extension edge 13 away from the beam 10. The width of the groove opening and the width of the groove are the same, facilitating the insertion of cable ties and simplifying the manufacturing of the upper extension edge 13. When the upper extension edge 13 has a closing groove or through groove, the recessed pipeline laying groove 12 secures the pipeline with cable ties. When the upper extension edge 13 has a round hole or square hole, the recessed pipeline laying groove 12 secures the pipeline with wire clips, which are then fixed at the round or square hole. In summary, whether it is a closing groove, round hole, square hole, through groove, or other structure, all belong to the pipeline fixing structure 17 used for fixing pipelines.

[0051] Similarly, a constriction groove, round hole, square hole, through groove, or other pipeline fixing structure 17 can also be set at the bottom of the concave pipeline laying groove 14 on the lower extension edge 15. When a constriction groove or through groove is set on the lower extension edge 15, the pipeline is fixed and connected by cable ties. When a round hole or square hole is set on the lower extension edge 15, the pipeline is fixed by wire clips, and then the wire clips are fixed at the round hole or square hole.

[0052] In a preferred embodiment of this invention, the fixed support surface 131 is fixed to the passageway floor 20 by nailing. This fixing and installation process is simple and quick, reducing installation time and improving installation efficiency. In another embodiment, the fixed support surface 131 and the passageway floor 20 are connected by welding. Welded connections have higher strength and are more stable and reliable. In yet another embodiment, the fixed support surface 131 and the passageway floor 20 are fixedly connected by structural adhesive.

[0053] In another design, two deeper recessed pipe laying grooves 12 are formed only at the top of the support beam of the middle aisle of the bus, and no upper recessed pipe laying groove 14 is provided at the bottom of the support beam. In this design, pipes that are easy to install and can generate and transmit vibrations are first installed in the recessed pipe laying grooves 12, then pipes that are difficult to install are laid on top of them, and finally the connecting aisle floor 20 is installed. This not only places the pipes that generate and transmit vibrations at the bottom of the recessed pipe laying grooves 12, preventing vibrations from being transmitted to the aisle floor 20, but also improves the efficiency of pipe installation and reduces the difficulty of installation.

[0054] In this embodiment, without the concave pipeline paving groove 14, a lower extension edge 15 can be provided at the bottom of the beam 10, so that the bottom of the left and right ends of the lower extension edge 15 can form a lower lap surface 1511. In another embodiment, without the concave pipeline paving groove 14, the lower extension edge 15 is not provided, and therefore the lower lap surface 1511 is not provided; the beam is simply welded to the frame longitudinal beam 30 through the upper lap surface 1611.

[0055] In this embodiment, the beam 10 is a one-piece stamped beam formed from a single sheet metal sheet. This structure results in higher structural strength and greater stability for the beam 10. In another embodiment, such as... Figure 5 As shown, the beam 10 of the passenger bus central aisle support beam is a structure welded together from multiple structural components. Specifically, the beam 10 is a square steel structure with fixed ends 11 at both ends. Square lower notches are cut out at both ends, and the upper parts that are not cut out form lower protruding sections 161. The lower protruding sections 161 are U-shaped with their openings facing downwards. The lower edges of the two sides of the U-shape form upper overlapping surfaces 1611, which are used to overlap and weld with the longitudinal beams 30 of the vehicle frame. Two upward-facing grooves are also cut out from the upper side of the beam 10 to form recessed pipeline paving grooves 12. The upper sides of the beam on both sides of the recessed pipeline paving grooves form fixed support surfaces 131. A support plate 130, perpendicular to the length of the beam and extending horizontally, is welded to the bottom of the recessed pipeline paving groove on the beam body 10. This support plate 130 serves the same function as the upper extending edge 13 in the above embodiment: supporting the pipelines laid in the recessed pipeline paving groove, and having a pipeline fixing structure 17 at the edge of its cantilever section. The specific structural form of the pipeline fixing structure 17 can be the same as in the above embodiment, and will not be listed here. This structure facilitates the manufacture of irregularly shaped support beams for the central aisle of fully load-bearing buses, and reduces costs.

[0056] The implementation method of the irregular support beam for the central aisle of the fully load-bearing bus of this utility model is the same as the irregular support beam structure for the central aisle in the implementation method of the fully load-bearing bus described above, and will not be repeated here.

[0057] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. The patent protection scope of this utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of this utility model shall also be included within the protection scope of this utility model.

Claims

1. A special-shaped support beam for a full-load bus middle aisle, characterized in that, The beam includes a beam body with fixed ends at both ends for fixed connection to the longitudinal beams of the vehicle frame. The top surface of the beam body has an upward-opening recessed pipeline laying groove for pipelines to be laid directly inside. There are two recessed pipeline laying grooves, which are spaced apart along the length of the beam body. The top surfaces of the beam body on both sides of the recessed pipeline laying grooves form a fixed support surface for supporting and fixing the passageway floor.

2. The contoured support beam for a full-coach bus mid-aisle as defined in claim 1 wherein, The bottom surface of the beam has a downward-opening concave pipe laying groove to form a pipe passage between it and the central support beam of the luggage compartment. The pipe passage and the concave pipe laying groove are arranged vertically to separate the pipes within them into vertical layers. The pipe passage is used to allow pipes subject to vibration to pass through so that they are kept away from the aisle floor.

3. The contoured support beam for a full-coach bus mid-aisle as defined in claim 2 wherein, The beam body has an extension edge extending perpendicular to the length direction of the beam body at least at the bottom of the concave pipeline laying groove and the upper concave pipeline laying groove, and the extension edge is provided with a pipeline fixing structure for fixing wire clips or pipeline cable ties.

4. The contoured support beam for a full-coach bus mid-aisle as defined in claim 3 wherein, The extension sides of the concave pipeline paving groove and the convex pipeline paving groove extend to both sides of the beam body, respectively, so as to fix the pipelines in the concave pipeline paving groove and the convex pipeline paving groove through the two extension sides.

5. The contoured support beam for a full-coach bus mid-aisle as defined in claim 4 wherein, The upper extension edge extends from one end edge of the beam body along the top edge to the other end edge, and the horizontal extension edges on both sides of the recessed pipeline paving groove on the beam body constitute the fixed support surface.

6. The contoured support beam for a full-coach bus mid-aisle as defined in claim 5 wherein, At both ends of the beam, corresponding to the recessed pipeline paving groove, there are upper protruding sections extending outward in the length direction of the beam. The horizontally extending edge at the bottom of the upper protruding section forms an upper lap surface for lap welding with the longitudinal beam of the frame.

7. The irregularly shaped support beam for the central aisle of a fully load-bearing bus according to claim 4, characterized in that it is located in... The lower extension edge extends along the bottom edge of the beam. At both ends of the beam, corresponding to the position of the upper concave pipeline paving groove, there are respectively a lower protruding section extending outward in the length direction of the beam. The horizontal extension edge at the bottom of the lower protruding section forms a lower lap surface for lap welding with the longitudinal beam of the frame.

8. The irregularly shaped support beam for the central aisle of a fully load-bearing bus according to claim 1, characterized in that, The beam body has an extension side extending perpendicular to the length direction of the beam body at least at the bottom of the recessed pipeline laying groove, and the extension side is provided with a pipeline fixing structure for fixing wire clips or pipeline cable ties.

9. A fully load-bearing passenger vehicle, comprising a frame, the frame including left and right pairs of frame longitudinal beams, a plurality of luggage compartment central support beams arranged at intervals in the front-rear direction fixedly connected at the bottom position between the two frame longitudinal beams, step frames respectively connected to the top of the two frame longitudinal beams on opposite sides, a plurality of central aisle support beams arranged at intervals in the front-rear direction fixedly connected between the top and bottom of the two frame longitudinal beams, the central aisle floor being laid on the central aisle support beams, characterized in that, The central aisle support beam is the irregularly shaped support beam of the central aisle of the fully load-bearing bus as described in any one of claims 1-8, and a pipeline extending forward and backward is installed between the central aisle floor and the central support beam of the luggage compartment.

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