Large-span double-beam truss vehicle for building

Abstract

The invention discloses a large-span double-beam joist barrow for building, and relates to the technical field of double-beam lifting joist barrows, the large-span double-beam joist barrow comprises two main beams, end beams, auxiliary beams and a lifting trolley, the two main beams are arranged in parallel, guide rails are arranged on the main beams, the lifting trolley moves along the main beams, and the large-span double-beam joist barrow further comprises a rail cleaning mechanism; the track cleaning mechanism comprises scraping plates, the scraping plates are fixedly arranged on the two sides of the lifting trolley, and main conveying belt type pushing mechanisms used for cleaning sundries on the main beam are distributed on the scraping plates. According to the invention, sundries falling on the main beam or caked and adhered to the main beam are shoveled by the scraper, and in the process that the scraper moves along with the lifting trolley, the arranged transmission rollers roll along the main beam, and the distributed transmission mechanisms drive the conveying belt body arranged at the bottom of the scraper to operate, so that the sundries directly fall off from the edge, and the conveying efficiency is improved. And abrasion caused by the fact that sundries move to the end of the beam body along the main beam or the guide rail along with pushing of the scraper is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of double-beam lifting truss vehicles, in particular to a large-span double-beam lifting truss vehicle for construction. Background Art

[0002] A large-span double-girder gantry crane usually refers to a double-girder bridge crane or gantry crane used in large-span applications. It has a high load-bearing capacity and stability. For example, this equipment is used in building construction projects to lift some construction equipment or materials.

[0003] The existing large-span double-girder truss vehicle includes a main beam structure, end beams, a lifting trolley and a drive system. The main beam adopts a parallel box-type structure to ensure bending and torsional resistance. The lifting trolley is controlled and driven by the drive system, moves along the main beam track, and lifts cargo through the lifting mechanism.

[0004] The disadvantages of the existing large-span double-girder gantry crane are that: due to its application in the construction engineering environment, it is inevitable that some debris such as bolts, tools or building materials will fall onto the track surface, or the track grease will harden and agglomerate on the track, and the existing double-girder gantry crane generally does not have a device for cleaning the track. The wheels of the lifting trolley press on the debris on the track, especially some metal debris, which is not easy to crush, and it is easy to damage the wheels, or cause the lifting trolley to shift its position, which may cause derailment in severe cases. Although a scraper can be installed on the trolley so that the scraper can push and scrape away the debris on the track during the trolley's forward movement, the simple scraper will only move along the main beam track as the scraper pushes the debris, and may only fall down when it moves to the end of the main beam track, that is, the debris pushed and scraped by the scraper cannot be separated from the main beam track in time. In this way, the debris may wear the surface of the main beam track during the movement pushed by the scraper, and still cause harm. Summary of the Invention

[0005] The purpose of the present invention is to provide a large-span double-girder truss vehicle for construction, so as to solve the technical problem in the prior art that large-span double-girder truss vehicles are not convenient for effectively cleaning up debris on the main beam track in a timely manner, which is prone to cause harm.

[0006] The technical problem to be solved by the present invention can be achieved through the following technical solutions: A large-span double-beam truss vehicle for construction, comprising a main beam, an end beam, a secondary beam and a lifting trolley, wherein two main beams are arranged in parallel, a guide track is provided on the main beam, and the lifting trolley moves along the main beam, and further comprising a track cleaning mechanism; The track cleaning mechanism includes a scraper, and scrapers are fixedly provided on both sides of the lifting trolley. A main conveyor belt pushing mechanism for cleaning up debris on the main beam is distributed on the scraper. The main conveyor belt pushing mechanism includes a main conveyor belt mechanism and a transmission roller rolling along the end face of the main beam, and a transmission mechanism is connected between the transmission roller and the main conveyor belt mechanism. When the transmission roller rolls along the main beam, the main conveyor belt mechanism is driven to operate through the transmission mechanism.

[0007] Preferably, the main conveyor belt type pushing mechanism is provided with two groups, and is distributed on both sides of the bottom of the scraper.

[0008] Preferably, the main conveyor belt mechanism includes a mounting opening, a conveyor belt body and a first synchronous wheel. The mounting opening is opened at the bottom of the scraper. Transmission columns are rotatably connected on both sides of the mounting opening. The conveyor belt body is cooperatively connected between the two transmission columns, and a plurality of convex plates are evenly distributed on the conveyor belt body. The first synchronous wheel is coaxially fixedly connected to one of the transmission columns, and the first synchronous wheel is cooperatively connected to the transmission roller through a transmission mechanism.

[0009] Preferably, the transmission mechanism includes a transmission gear set, a second synchronous wheel and a first synchronous belt. A wheel frame is fixedly installed on one side of the scraper. The transmission roller is rotatably connected to the wheel frame. The second synchronous wheel is rotatably connected to the wheel frame. The second synchronous wheel is connected to the first synchronous wheel through the first synchronous belt. The second synchronous wheel is also connected to the transmission roller through the transmission gear set.

[0010] Preferably, the transmission gear group includes a first steering bevel gear, a second steering bevel gear and a steering gear group, the first steering bevel gear is coaxially fixedly connected to the transmission roller, the second steering bevel gear is rotationally connected to the wheel frame, and the second steering bevel gear is meshed with the first steering bevel gear, and the second steering bevel gear is connected to the second synchronous wheel through the steering gear group.

[0011] Preferably, the steering gear set includes a first transmission gear and a second transmission gear, the first transmission gear is coaxially fixedly connected to the second steering bevel gear, the second transmission gear is coaxially fixedly connected to the second synchronous wheel, and the first transmission gear is meshed with the second transmission gear.

[0012] Preferably, the scraper is also provided with a secondary conveyor belt mechanism, and the secondary conveyor belt mechanism has the same structure as the main conveyor belt mechanism, and a third synchronous wheel is rotatably provided on the scraper side wall corresponding to the position of the secondary conveyor belt mechanism, and a second synchronous belt is cooperated and connected between the third synchronous wheel and the first synchronous wheel of the secondary conveyor belt mechanism, and a fourth synchronous wheel is coaxially fixedly connected to the second synchronous wheel, and a third synchronous belt is cooperated and connected between the fourth synchronous wheel and the third synchronous wheel.

[0013] Preferably, a material receiving box is provided on both sides of each scraper, and the material receiving box includes a side baffle and a bottom box. The side baffle is fixedly connected to the lifting trolley, and the bottom box is fixedly connected below the side baffle and is located below the edge of the main beam. The side baffle is located at the edge of the main beam.

[0014] Preferably, a linkage elastic switch mechanism is provided at the bottom of the bottom box, and recovery boxes are fixedly connected to both ends of the main beam, and the recovery boxes cooperate with the linkage elastic switch mechanism.

[0015] Preferably, the linkage elastic switch mechanism includes a slide plate, a linkage block and a limit spring. The bottom of the bottom box is an opening. The slide plate slides through the bottom box near the bottom, and one side of the slide plate is connected to the bottom box through the limit spring. The linkage block is fixedly connected to the bottom of the side of the slide plate away from the limit spring, and the linkage block is aligned with the top edge of the recovery box on the corresponding side.

[0016] Beneficial effects of the present invention: 1. The present invention provides a scraper on the lifting trolley, which facilitates the scraper to remove debris that has fallen on the main beam or stuck to the main beam during the movement of the lifting trolley. As the scraper moves with the lifting trolley, the transmission rollers provided thereon roll along the main beam, and the distributed transmission mechanism drives the conveyor belt body provided at the bottom of the scraper to run. The conveyor belt body relies on the distributed convex plates to directly push the debris pushed by the scraper to the edge of the main beam, thereby making it easier for the debris to fall directly from the edge, avoiding the debris being pushed by the scraper and moving along the main beam or guide rail to the end of the beam body to cause wear, thereby effectively protecting the main beam and the guide rail.

[0017] 2. The present invention cooperates with the conveyor belt body and the convex plate to push the debris scooped up by the scraper down from the edge of the main beam, and the bottom boxes distributed on both sides of the lifting trolley catch the fallen debris, avoiding the danger caused by falling objects from high altitude. Moreover, when the bottom box moves to the end of the main beam with the lifting trolley, the slide at the bottom of the bottom box slides open due to the squeezing effect of the recovery box, making it convenient for the debris in the bottom box to fall into the recovery box. Since the recovery box is at the end of the main beam, it is convenient for manual processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall left-side structure of the present invention; Figure 3 This is a schematic diagram of the structure of the scraper and the main beam in the present invention; Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at A in the middle; Figure 5 This is a schematic structural diagram of the relative position distribution of the lifting trolley, driving wheels and main beam in the present invention; Figure 6 yes Figure 5 Schematic diagram of the enlarged structure at B in the middle; Figure 7 This is a schematic diagram of the structure of the transmission roller and the scraper in the present invention; Figure 8 It is a schematic structural diagram of the transmission rollers in the present invention in cooperation with the transmission posts of the main conveyor belt mechanism and the auxiliary conveyor belt mechanism; Figure 9 It is a structural schematic diagram of the bottom box of the present invention; Figure 10 It is a schematic cross-sectional view of the sliding plate and the bottom box in the present invention; Figure 11 It is a schematic diagram of the docking state of the bottom box and the recovery box in the present invention.

[0020] In the figure: 1. Main beam; 2. Guide rail; 3. Auxiliary beam; 4. End beam; 5. Lifting trolley; 6. Driving wheel; 7. Hook; 8. Recovery box; 9. Side baffle; 10. Bottom box; 11. Scraper; 12. Mounting port; 13. Conveyor belt body; 14. Conveyor plate; 15. Transmission column; 16. Transmission roller; 17. Fourth synchronous wheel; 18. Third synchronous wheel; 19. Third synchronous belt; 20. First steering bevel gear; 21. Second steering bevel gear; 22. First transmission gear; 23. Second transmission gear; 24. Second synchronous wheel; 25. First synchronous belt; 26. Limiting spring; 27. Slide plate; 28. Linkage block; 29. ​​Wheel frame; 30. First synchronous wheel; 31. Second synchronous belt. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0022] like Figures 1-11The lifting trolley 5 is a kind of large-span double-beam truss vehicle for construction, comprising a main beam 1, an end beam 4, a sub-beam 3 and a lifting trolley 5. The main beam 1 is provided with two parallel arrangements, and a guide rail 2 is provided on the main beam 1. Driving wheels 6 are distributed on both sides of the lifting trolley 5, which rely on the driving wheels 6 to cooperate with the guide rail 2 to achieve movement on the main beam 1, and a hook 7 is provided at the bottom of the lifting trolley 5. The hook 7 with the heavy object is moved up and down by a winch installed at the bottom of the lifting trolley 5. The end beam 4 is fixedly connected between the ends of the two main beams 1 by bolts, and a driving wheel assembly is installed inside the end beam 4. The main beam 1 is driven to move laterally along the sub-beam 3 through the driving wheel assembly. There are also two sub-beams 3, which are used to be installed on the roofs of two oppositely distributed buildings. The sub-beam 3 is distributed perpendicular to the main beam 1, which is convenient for realizing large-span transportation and lifting materials. The double-beam truss vehicle also includes a track cleaning mechanism, which includes a track cleaning mechanism that matches the guide rail 2 and the upper surface of the main beam 1. The scraper 11 is combined, and scrapers 11 are fixedly provided on both sides of the lifting trolley 5. It should be noted that the scraper 11 referred to here is coordinated with the guide rail 2 and the upper surface of the main beam 1, which means that the bottom edge of the scraper 11 changes with the ups and downs of the guide rail 2 and the upper surface of the main beam 1, so as to ensure that different positions can be pushed and scraped; the scraper 11 is distributed with a main conveyor belt pushing mechanism for cleaning up the debris on the main beam 1, and the main conveyor belt pushing mechanism includes a main conveyor belt mechanism and a transmission roller 16 that rolls along the end face of the main beam 1, and a transmission mechanism is connected to the main conveyor belt mechanism. When the transmission roller 16 rolls along the main beam 1, the main conveyor belt mechanism can be driven to operate by the transmission mechanism, so as to facilitate the transportation of debris scraped off from the main beam 1 and the guide rail 2 by the scraper 11 to the edge for cleaning, so as to avoid the scraper 11 pushing the debris along the main beam 1 or the surface of the guide rail 2 and causing wear.

[0023] In some specific embodiments, such as Figure 4 As shown, there are two groups of main conveyor belt pushing mechanisms, which are distributed on both sides of the bottom of the scraper 11 and are divided by the position of the guide rail 2. The lengths of the two groups of main conveyor belt pushing mechanisms are set according to the bottom edge lengths of the scrapers 11 on both sides of the guide rail 2, ensuring that the two groups of main conveyor belt pushing mechanisms transport debris to the corresponding side edge positions of the main beam 1 respectively, thereby ensuring that the debris falling on the corresponding area of ​​the main beam 1 falls from the edge of the corresponding side, for example, the debris falling on the surface of the main beam 1 on the right side of the guide rail 2 falls from the right edge, and will not move along the surface of the main beam 1 or the guide rail 2 as pushed by the scraper 11, causing wear on the surface of the main beam 1 or the guide rail 2.

[0024] In some embodiments, combined Figure 4 and Figure 8As shown, the main conveyor belt mechanism includes a mounting opening 12, a conveyor belt body 13 and a first synchronous wheel 30. The mounting opening 12 is opened at the bottom position of the scraper 11. Both sides of the mounting opening 12 are rotatably connected to the transmission column 15 through a rotating shaft. The conveyor belt body 13 is connected between the two transmission columns 15, and a plurality of convex plates 14 are evenly distributed on the conveyor belt body 13. The first synchronous wheel 30 is coaxially fixedly connected to one of the transmission columns 15, and the first synchronous wheel 30 is connected to the transmission roller 16 through a transmission mechanism.

[0025] In other specific embodiments, reference Figure 8 As shown, the transmission mechanism includes a transmission gear set, a second synchronous wheel 24 and a first synchronous belt 25. A wheel frame 29 is fixedly installed on one side of the scraper 11. The transmission roller 16 is rotatably connected to the wheel frame 29. The second synchronous wheel 24 is rotatably connected to the wheel frame 29 through a rotating shaft. The second synchronous wheel 24 is connected to the first synchronous wheel 30 through the first synchronous belt 25, and the second synchronous wheel 24 is also connected to the transmission roller 16 through the transmission gear set.

[0026] Among them, the transmission gear group includes a first steering bevel gear 20, a second steering bevel gear 21 and a steering gear group. The first steering bevel gear 20 is coaxially fixedly connected to the transmission roller 16, and the second steering bevel gear 21 is rotatably connected to the wheel frame 29 through a rotating shaft. The second steering bevel gear 21 is meshed with the first steering bevel gear 20, and the second steering bevel gear 21 is connected to the second synchronous wheel 24 through the steering gear group.

[0027] In some specific embodiments, the steering gear set includes a first transmission gear 22 and a second transmission gear 23, the first transmission gear 22 is coaxially fixedly connected to the second steering bevel gear 21, the second transmission gear 23 is coaxially fixedly connected to the second synchronous wheel 24, and the first transmission gear 22 is meshed with the second transmission gear 23.

[0028] When the lifting trolley 5 moves along the main beam 1, the transmission roller 16 on the scraper 11 on the forward side rolls synchronously along the surface of the main beam 1. During the rolling process, it drives the first steering bevel gear 20 to rotate, and the first steering bevel gear 20 drives the second steering bevel gear 21 to rotate. The second steering bevel gear 21 drives the first transmission gear 22 to rotate synchronously, and the first transmission gear 22 drives the second transmission gear 23 to rotate. The second transmission gear 23 drives the second synchronous wheel 24 to rotate. The second synchronous wheel 24 drives the corresponding transmission column 15 to rotate through the first synchronous belt 25 and the first synchronous wheel 30. The transmission column 15 makes the corresponding conveyor belt body 13 operate. During this process, if the scraper 11 scoops up debris, the running conveyor belt body 13 can rely on the distributed convex plates 14 to push the debris to the edge of the main beam 1 and fall off, so as to prevent the debris from relying on the scraper 11 to move along the main beam 1 all the time, causing wear to the main beam 1, especially some metal debris.

[0029] In some embodiments, combined Figures 6 to 8 As shown, the scraper 11 is also provided with a secondary conveyor belt mechanism, and the secondary conveyor belt mechanism has the same structure as the main conveyor belt mechanism, and only the length and other dimensions will differ. A third synchronous wheel 18 is rotatably provided on the side wall of the scraper 11 corresponding to the position of the secondary conveyor belt mechanism. Specifically, a bracket can be fixedly installed on the side wall of the scraper 11, and the third synchronous wheel 18 is connected to the bracket through a rotating shaft, so as to achieve connection with the scraper 11. A second synchronous belt 31 is cooperated and connected between the third synchronous wheel 18 and the first synchronous wheel 30 of the secondary conveyor belt mechanism. A fourth synchronous wheel 17 is also coaxially fixedly connected to the second synchronous wheel 24, and a third synchronous belt 19 is cooperated and connected between the fourth synchronous wheel 17 and the third synchronous wheel 18. It should be noted that since the third synchronous wheel 18 must be connected to both the second synchronous belt 31 and the third synchronous belt 19, the third synchronous wheel 18 needs to be set as a longer component, and two annular limit grooves can be set on its surface to limit the corresponding synchronous belt position. In this way, when the corresponding side transmission roller 16 rolls along the main beam 1 during the forward movement of the lifting trolley 5, it not only makes the corresponding main conveyor belt mechanism run, but also makes the fourth synchronous wheel 17 coaxially connected to the second synchronous wheel 24 rotate. The fourth synchronous wheel 17 drives the third synchronous wheel 18 to rotate through the third synchronous belt 19, and the third synchronous wheel 18 drives the first synchronous wheel 30 of the auxiliary conveyor belt mechanism to rotate through the second synchronous belt 31, thereby making the auxiliary conveyor belt mechanism run, making it convenient to push the debris on the guide rail 2 onto the main beam 1, and then rely on the corresponding main conveyor belt mechanism to continue pushing the debris, and finally push it down from the edge.

[0030] In some specific implementation schemes, in order to avoid the occurrence of falling objects from high altitudes and the danger to people on the ground, Figure 2 and Figure 9 , each scraper 11 is provided with a material receiving box on both sides, and the material receiving box includes a side baffle 9 and a bottom box 10. The side baffle 9 is fixedly connected to the lifting trolley 5, and the bottom box 10 is fixedly connected to the bottom of the side baffle 9, and is located below the edge of the main beam 1. The side baffle 9 is located at the edge of the main beam 1. Specifically, according to needs, several plates can be used to cooperate to enclose the edge of the main beam 1 aligned with the position of the scraper 11 to ensure that the pushed debris falls into the bottom box 10.

[0031] In other specific embodiments, in order to facilitate the recovery of debris in the bottom box 10, a linkage elastic switch mechanism is provided at the bottom of the bottom box 10, and recycling boxes 8 are fixedly connected to both ends of the main beam 1, and the recycling boxes 8 cooperate with the linkage elastic switch mechanism.

[0032] Among them, such as Figure 10As shown, the linkage elastic switch mechanism includes a slide plate 27, a linkage block 28 and a limit spring 26. The bottom of the bottom box 10 is open, and the slide plate 27 slides through the bottom box 10 near the bottom, and one side of the slide plate 27 is connected to the bottom box 10 through the limit spring 26. The linkage block 28 is fixedly connected to the bottom of the side of the slide plate 27 away from the limit spring 26, and the linkage block 28 is aligned with the top edge of the recovery box 8 on the corresponding side.

[0033] When the lifting trolley 5 is about to move to the end position of the main beam 1 with the distributed bottom box 10, the linkage stopper 28 on the slide plate 27 at the bottom of the bottom box 10 contacts the top edge position of the corresponding recovery box 8. Then, as the lifting trolley 5 continues to move, the slide plate 27 is blocked and cannot continue to move. Therefore, relative sliding occurs between the slide plate 27 and the bottom box 10, and the slide plate 27 opens the bottom of the bottom box 10. For details, please refer to Figure 11 , so that the debris collected in the bottom box 10 can fall into the recovery box 8. Since the recovery box 8 is at the end of the main beam 1, close to the top of the building, it is convenient for manual cleaning. In this process, the limit spring 26 is stretched to generate a rebound force, which makes it convenient for the lifting trolley 5 to reset, and the slide plate 27 is reset relative to the bottom box 10 to re-close the bottom of the bottom box 10.

[0034] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in conjunction with specific application scenarios: When the lifting trolley 5 lifts the heavy object through the hook 7 and moves in the corresponding direction along the guide track 2 on the main beam 1, the scraper 11 arranged in the forward direction of the lifting trolley 5 scrapes off the debris or lumps that fall on the main beam 1 or the guide track 2.

[0035] When the lifting trolley 5 moves along the main beam 1, the transmission roller 16 on the scraper 11 on the forward side rolls synchronously along the surface of the main beam 1. During the rolling process, it drives the first steering bevel gear 20 to rotate, and the first steering bevel gear 20 drives the second steering bevel gear 21 to rotate. The second steering bevel gear 21 drives the first transmission gear 22 to rotate synchronously, and the first transmission gear 22 drives the second transmission gear 23 to rotate. The second transmission gear 23 drives the second synchronous wheel 24 to rotate. The second synchronous wheel 24 drives the corresponding transmission column 15 to rotate through the first synchronous belt 25 and the first synchronous wheel 30. The transmission column 15 makes the corresponding conveyor belt body 13 operate. During this process, if the scraper 11 scoops up debris, the running conveyor belt body 13 can rely on the distributed convex plates 14 to push the debris to the edge of the main beam 1 and drop it, so as to prevent the debris from always relying on the scraper 11 to move along the main beam 1 and causing wear to the main beam 1. And when the corresponding side transmission roller 16 rolls along the main beam 1 during the forward movement of the lifting trolley 5, the transmission roller 16 also causes the fourth synchronous wheel 17 coaxially connected to the second synchronous wheel 24 to rotate, and the fourth synchronous wheel 17 drives the third synchronous wheel 18 to rotate through the third synchronous belt 19, and the third synchronous wheel 18 drives the first synchronous wheel 30 of the auxiliary conveyor belt mechanism to rotate through the second synchronous belt 31, thereby making the auxiliary conveyor belt mechanism operate, facilitating the pushing of debris on the guide rail 2 onto the main beam 1, and then relying on the corresponding main conveyor belt mechanism to continue pushing the debris, and finally pushing it down from the edge; The debris falling from the edge of the main beam 1 falls into the bottom box 10 by relying on the side baffles 9, and when the lifting trolley 5 is about to move to the end position of the main beam 1 with the distributed bottom box 10, the linkage stopper 28 on the slide plate 27 at the bottom of the bottom box 10 contacts the corresponding top edge position of the recovery box 8. Then, as the lifting trolley 5 continues to move, the slide plate 27 is blocked and cannot continue to move, so relative sliding occurs between the slide plate 27 and the bottom box 10, and the slide plate 27 opens the bottom of the bottom box 10, thereby facilitating the debris collected in the bottom box 10 to fall into the recovery box 8. Since the recovery box 8 is at the end of the main beam 1, close to the top of the building, it is convenient for manual cleaning, and in this process, the limit spring 26 is stretched to generate a rebound force, which makes it convenient for the lifting trolley 5 to reset, and the slide plate 27 resets relative to the bottom box 10, reclosing the bottom of the bottom box 10.

[0036] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A large-span double-beam truss vehicle for construction, comprising a main beam (1), an end beam (4), a secondary beam (3) and a lifting trolley (5), wherein two main beams (1) are arranged in parallel, a guide rail (2) is provided on the main beam (1), and the lifting trolley (5) moves along the main beam (1), characterized in that: Also included are track clearing mechanisms; The track cleaning mechanism includes a scraper (11), and the scraper (11) is fixedly provided on both sides of the lifting trolley (5). A main conveyor belt type pushing mechanism for cleaning debris from the main beam (1) is distributed on the scraper (11). The main conveyor belt type pushing mechanism includes a main conveyor belt mechanism and a transmission roller (16) rolling along the end face of the main beam (1), and a transmission mechanism is connected between the transmission roller (16) and the main conveyor belt mechanism. When the transmission roller (16) rolls along the main beam (1), the main conveyor belt mechanism is driven to operate through the transmission mechanism.

2. A large-span double-beam truss vehicle for construction according to claim 1, characterized in that: The main conveyor belt type pushing mechanism is provided with two groups, and is distributed on both sides of the bottom of the scraper (11).

3. The large-span double-beam truss vehicle for construction according to claim 1, characterized in that: The main conveyor belt mechanism comprises an installation opening (12), a conveyor belt body (13) and a first synchronous wheel (30). The installation opening (12) is opened at the bottom position of the scraper (11). Both sides of the installation opening (12) are rotatably connected to transmission columns (15). The conveyor belt body (13) is cooperatively connected between the two transmission columns (15), and a plurality of convex plates (14) are evenly distributed on the conveyor belt body (13). The first synchronous wheel (30) is coaxially fixedly connected to one of the transmission columns (15), and the first synchronous wheel (30) is cooperatively connected to the transmission roller (16) through a transmission mechanism.

4. A large-span double-beam truss vehicle for construction according to claim 3, characterized in that: The transmission mechanism includes a transmission gear set, a second synchronous wheel (24) and a first synchronous belt (25); a wheel frame (29) is fixedly mounted on one side of the scraper (11); the transmission roller (16) is rotatably connected to the wheel frame (29); the second synchronous wheel (24) is rotatably connected to the wheel frame (29); the second synchronous wheel (24) is connected to the first synchronous wheel (30) through the first synchronous belt (25); and the second synchronous wheel (24) is further connected to the transmission roller (16) through the transmission gear set.

5. A large-span double-beam truss vehicle for construction according to claim 4, characterized in that: The transmission gear set comprises a first steering bevel gear (20), a second steering bevel gear (21) and a steering gear set, wherein the first steering bevel gear (20) is coaxially fixedly connected to the transmission roller (16), the second steering bevel gear (21) is rotationally connected to the wheel frame (29), and the second steering bevel gear (21) is meshed with the first steering bevel gear (20), and the second steering bevel gear (21) is cooperatively connected to the second synchronous wheel (24) through the steering gear set.

6. A large-span double-beam truss vehicle for construction according to claim 5, characterized in that: The steering gear set comprises a first transmission gear (22) and a second transmission gear (23), wherein the first transmission gear (22) is coaxially fixedly connected to the second steering bevel gear (21), the second transmission gear (23) is coaxially fixedly connected to the second synchronous wheel (24), and the first transmission gear (22) is meshed with the second transmission gear (23).

7. A large-span double-beam truss vehicle for construction according to claim 4, characterized in that: The scraper (11) is also provided with an auxiliary conveyor belt mechanism, and the auxiliary conveyor belt mechanism has the same structure as the main conveyor belt mechanism. A third synchronous wheel (18) is rotatably provided on the side wall of the scraper (11) corresponding to the position of the auxiliary conveyor belt mechanism. A second synchronous belt (31) is connected between the third synchronous wheel (18) and the first synchronous wheel (30) of the auxiliary conveyor belt mechanism. A fourth synchronous wheel (17) is coaxially fixedly connected to the second synchronous wheel (24), and a third synchronous belt (19) is connected between the fourth synchronous wheel (17) and the third synchronous wheel (18).

8. The large-span double-beam truss vehicle for construction according to claim 4, characterized in that: A material receiving box is provided on both sides of each scraper (11), and the material receiving box includes a side baffle (9) and a bottom box (10). The side baffle (9) is fixedly connected to the lifting trolley (5), and the bottom box (10) is fixedly connected below the side baffle (9) and is located below the edge of the main beam (1). The side baffle (9) is located at the edge of the main beam (1).

9. A large-span double-beam truss vehicle for construction according to claim 8, characterized in that: A linkage elastic switch mechanism is provided at the bottom of the bottom box (10), and recovery boxes (8) are fixedly connected to both ends of the main beam (1), and the recovery box (8) cooperates with the linkage elastic switch mechanism.

10. A large-span double-beam truss vehicle for construction according to claim 9, characterized in that: The linkage elastic switch mechanism includes a slide plate (27), a linkage block (28) and a limit spring (26); the bottom of the bottom box (10) is open; the slide plate (27) slides through a position near the bottom of the bottom box (10); and one side of the slide plate (27) is connected to the bottom box (10) via the limit spring (26); the linkage block (28) is fixedly connected below a side of the slide plate (27) away from the limit spring (26), and the linkage block (28) is aligned with the top edge of the recovery box (8) on the corresponding side.

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