Highway engineering cost display device and operation method

Abstract

The invention relates to the technical field of engineering cost display, and discloses a highway engineering cost display device and an operation method.The highway engineering cost display device comprises a display board, and a clamping piece is arranged on the display board; the lifting mechanism comprises a supporting rod rotationally connected with the display board, the two ends of the supporting rod are connected with spur racks, the spur racks are connected with driving parts, and the driving parts are used for synchronously adjusting the two spur racks; the angle adjusting mechanism is installed on the lifting mechanism and used for adjusting the inclination angle of the display board. According to the display device, the two spur racks are synchronously adjusted through the driving part, then the supporting rod drives the display board to synchronously ascend and descend, the problem that the display board is not smooth enough in the ascending and descending process is solved, the inclination angle of the display board is adjusted through the angle adjusting mechanism, and practicability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of highway project cost display, and specifically relates to a highway project cost display device and an operation method thereof. Background Art

[0002] In the work related to project cost, the display device is an important tool for presenting key information such as project cost, budget, and settlement to all parties. Its performance directly affects the efficiency and accuracy of information transmission. There are many problems to be solved urgently in the existing highway project cost display devices. On the one hand, in terms of the lifting function of the display board, many devices use telescopic rods to adjust the height at both ends of the rotating shaft respectively. However, in actual operation, it is very difficult to ensure the synchronous operation of the telescopic rods. This results in inconsistent heights at both ends of the display board during the lifting process, and the lifting process is not smooth enough. This not only affects the display effect, but also may cause the materials fixed on the display board to fall or be damaged, reducing the reliability of the device. On the other hand, in terms of angle adjustment of the existing display devices, the functions are often single, the adjustment methods are complex and not flexible enough. It is impossible to quickly and accurately adjust the inclination angle of the display board according to different display requirements, greatly limiting the practicality of the device in various scenarios. In addition, the existing display devices also have deficiencies in fixing materials. There is a lack of a convenient and effective clamping method, making it difficult to firmly fix paper documents such as cost tables on the display board. To sum up, there is an urgent practical need to develop a highway project cost display device that can achieve smooth lifting of the display board, flexible angle adjustment, and convenient material fixing.

[0003] On the other hand, in highway engineering, for work such as predicting, planning, controlling, accounting, analyzing, and evaluating engineering projects to obtain the construction costs expected or actually incurred during the construction period, a display device can be used to analyze or evaluate the project. CN212391978U discloses a display rack for project cost, including a horizontal board. Four square chutes are opened on the upper surface of the horizontal board. A slider is arranged inside each square chute, and the slider is slidably connected to the square chute. One end of the sliders on the front and back sides located outside the square chute is hinged with a display board, and a rotating shaft is sleeved at one end of the two display boards away from the sliders. Both the left and right ends of the rotating shaft are fixedly connected with telescopic rods. By setting a vertical rod, an I-shaped plate, a sliding rod, and an arc chute, the I-shaped plate can be moved up and down through the up and down movement of the arc plate, and then the sliding rod can be moved up and down, so as to adjust the inclination angle of the display board.

[0004] The existing display devices have the following problems: Since the telescopic rods are used to adjust the height at both ends of the rotating shaft respectively, it is difficult to achieve synchronous lifting, resulting in an uneven lifting process of the display board.

[0005] Based on the above situation, there is an urgent need for a measure to display highway project costs to solve the problem that the lifting process of the display board is not smooth enough. Summary of the Invention

[0006] The object of the present invention is to solve the problem that the lifting process of the display board is not smooth enough for the existing display device. Since the telescopic rods are used to adjust the heights at both ends of the rotating shaft respectively, it is difficult to achieve synchronous lifting, resulting in the lifting process of the display board not being smooth enough.

[0007] The technical solution of the present invention is as follows: A display device for highway project costs includes: A display board, on which a clamping member is provided; A lifting mechanism, including a support rod rotatably connected to the display board. Both ends of the support rod are connected with straight racks, and the straight racks are connected with a driving part, and the driving part is used to synchronously adjust the two straight racks; An angle adjustment mechanism, installed on the lifting mechanism and used to adjust the inclination angle of the display board.

[0008] For the existing display device, since the telescopic rods are used to adjust the heights at both ends of the rotating shaft respectively, it is difficult to achieve synchronous lifting, resulting in the lifting process of the display board not being smooth enough. In this solution, the two straight racks are synchronously adjusted by the driving part, and then the support rod drives the display board to lift synchronously, solving the problem that the lifting process of the display board is not smooth enough. The inclination angle of the display board is adjusted by the angle adjustment mechanism, improving the practicability.

[0009] Furthermore, the specific structure of the driving part is not uniquely defined in this solution. One feasible solution is that the driving part includes a gear meshing with the straight rack. The gear is connected with a worm gear and the worm gear is connected with a worm. The parts of the worm meshing with the two worm gears have opposite helix directions. When this solution is adopted, by rotating the worm, the two worm gears are driven to rotate synchronously, so as to synchronously lift the two straight racks. Due to the self-locking property of the worm gear mechanism, the display board can be fixed at a specified height.

[0010] Furthermore, in order to facilitate the rotation of the worm, one feasible solution is that the worm is connected with a rotating rod and a grip is installed on the rotating rod. When this solution is adopted, by operating the grip, the worm can be rotated conveniently and quickly.

[0011] Furthermore, the specific structure of the angle adjustment mechanism is not uniquely defined in this solution. One feasible solution is that the angle adjustment mechanism includes an intermediate rod installed on the display board, and a sleeve cooperating with the intermediate rod is installed on the straight rack. When this solution is adopted, by extending or retracting the intermediate rod from the sleeve, the display board is driven to rotate, and the inclination angle of the display board can be adjusted conveniently and quickly.

[0012] Furthermore, in order to facilitate fixing the inclination angle of the display board, one feasible solution is as follows: a locking knob is installed on the sleeve. When adopting this solution, by tightening the locking knob, the intermediate rod can be fixed, and thus the inclination angle of the display board can be fixed.

[0013] Furthermore, the clamping member includes a plurality of magnets adsorbed on the display board. When adopting this solution, it is convenient to fix paper documents such as cost sheets on the display board by means of the magnets.

[0014] An operation method of the highway project cost display device according to the above, characterized in that the operation process is as follows: (1) Device assembly; Install the lifting mechanism: firmly connect the two ends of the support rod to the straight rack respectively to ensure that the connection part is stable and reliable; then, accurately engage and install the straight rack with the gear in the driving part so that the teeth of the gear and the straight rack fit tightly; then, install the worm gear on the shaft of the gear to ensure that the two are coaxial and firmly fixed; then, install the worm in a suitable position so that the part meshing with the two worm gears is in correct contact, and the parts of the worm meshing with the two worm gears have opposite helix directions; finally, connect the rotating rod to one end of the worm and install a grip on the rotating rod for convenient subsequent operation; after completing the assembly of the driving part, connect the straight rack to the support to complete the overall installation of the lifting mechanism; (2) Connect the display board and the lifting mechanism: rotatably connect the display board to the support rod to ensure that the display board can rotate flexibly around the connection point with the support rod; at the same time, install a clamping member on the display board, that is, adsorb a plurality of magnets to fix paper documents such as cost sheets; (3) Install the angle adjustment mechanism: install a sleeve cooperating with the intermediate rod at the corresponding position on the straight rack to make the sleeve firmly connected to the straight rack; then, install the intermediate rod on the display board and ensure that the intermediate rod can smoothly extend or retract in the sleeve; install a locking knob on the sleeve to fix the position of the intermediate rod; (4) Lifting and debugging: manually operate the grip and slowly rotate the worm to observe whether the two worm gears rotate synchronously and the movement of the gear and the straight rack connected thereto; ensure that the two straight racks can lift synchronously, drive the support rod to move smoothly, and thus enable the display board to lift smoothly; if problems such as asynchronous lifting or jamming are found, promptly check the meshing condition of the gear and the straight rack, the cooperation condition of the worm gear and the worm, and whether the connection parts are loose, and make corresponding adjustments and tightenings; (5) Angle adjustment debugging: Loosen the locking knob, manually push the display board, and extend or retract the middle rod in the sleeve, observe whether the rotation of the display board is flexible and smooth, and whether it can be adjusted to different inclination angles conveniently and quickly; after the inspection is completed, tighten the locking knob and test whether the inclination angle of the display board can be firmly fixed; if there are problems, check the matching accuracy between the middle rod and the sleeve, as well as the locking effect of the locking knob, and perform necessary repairs or component replacements. (6) Height adjustment: When it is necessary to adjust the height of the display board, the operator holds the handle and rotates the worm clockwise or counterclockwise according to the direction of the required height; the rotation of the worm drives the two worm wheels to rotate synchronously, and then the gears connected to them rotate synchronously, and finally drives the two straight racks to rise and fall synchronously. During the lifting and lowering process, observe the height change of the display board until the display board is adjusted to the preset height. (7) Angle adjustment: After the display board is adjusted to the preset height, if it is necessary to adjust the inclination angle of the display board, loosen the locking knob on the sleeve; then, manually rotate the display board to extend or retract the middle rod (31) in the sleeve accordingly, so as to drive the display board to rotate to the preset inclination angle; after the adjustment is completed, tighten the locking knob again to fix the inclination angle of the display board. (8) Data fixing and display: After the display board is adjusted to the appropriate height and inclination angle, use the magnet of the clamping piece on the display board to adsorb and fix paper documents such as cost tables on the display board, and then the project cost information can be displayed.

[0015] Specifically, this patent has the following effects: (1) Achieving stable lifting: Through the coordinated action of the gears, worm wheels and worms in the driving part, rotating the worm can drive the two worm wheels to rotate synchronously, and then make the two straight racks meshed with them rise and fall synchronously. This synchronous adjustment mechanism avoids the problem of inconsistent heights at both ends caused by the separate adjustment of traditional telescopic rods, ensures that the display board always remains stable during the lifting and lowering process, effectively improves the display effect, reduces the risk of data falling or damage, and enhances the reliability of the device. (2) Convenient height fixing: Due to the self-locking property of the worm and worm wheel mechanism, when the display board is adjusted to the preset height, the worm can prevent the worm wheel from reversing in the static state, so that the straight rack remains fixed, and then the display board is stably fixed at the specified height. No additional locking device is required, which simplifies the operation process and at the same time ensures the stability of the display board during use. (3) Simple and efficient operation: Connect a rotating rod to the worm and install a handle, and the operator only needs to easily operate the handle to conveniently and quickly rotate the worm to adjust the lifting height of the display board. This design conforms to the ergonomic principle, greatly reduces the operation difficulty, and improves the work efficiency. (4)Flexible angle adjustment: The angle adjustment mechanism adopts the cooperation mode of the middle rod and the sleeve, so that the middle rod extends or retracts from the sleeve, which can drive the display board to rotate, and the inclination angle of the display board can be adjusted conveniently and quickly. It meets the needs of all parties to clearly view the cost information on the display board from different angles in different display scenarios, and significantly improves the practicability of the device. (5)Stable inclination angle locking: A locking knob is installed on the sleeve. After the display board rotates to the preset inclination angle, tightening the locking knob can firmly fix the middle rod, and then stably lock the inclination angle of the display board. It ensures that the angle of the display board will not change randomly during the display process, providing a reliable guarantee for information display. (6)Convenient data fixing: The clamping parts arranged on the display board are composed of several magnets adsorbed on the display board. Using the adsorption force of the magnets, paper documents such as cost tables can be easily and firmly fixed on the display board. Compared with the traditional clamping method, this method is more convenient to operate and will not damage the data, facilitating the replacement and sorting of data. Brief Description of the Drawings

[0016] Figure 1 is the overall first perspective structural schematic diagram of the embodiment of the present invention; Figure 2 is the overall second perspective structural schematic diagram of the embodiment of the present invention; Figure 3 is Figure 1 the enlarged view of part A in Figure 4 is Figure 2 the enlarged view of part B in Figure 5 is Figure 2 the enlarged view of part C in

[0017] Reference Signs: 1, display board; 2, lifting mechanism; 3, angle adjustment mechanism; 11, clamping part; 21, support rod; 22, straight rack; 23, driving part; 231, gear; 232, worm gear; 233, worm; 234, rotating rod; 235, grip; 31, middle rod; 32, sleeve; 33, locking knob. Detailed Embodiment

[0018] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0019] The features and performance of the present invention will be further described in detail below in conjunction with embodiments.

[0020] Embodiment: Please refer to Figure 1 、 Figure 2 and Figure 3 , a highway engineering cost display device, comprising: A display board 1, on which a clamping member 11 is provided; A lifting mechanism 2, including a support rod 21 rotatably connected to the display board 1, both ends of the support rod 21 are connected with straight racks 22, the straight racks 22 are connected with a driving part 23, and the driving part 23 is used to synchronously adjust the two straight racks 22. Specifically, in this embodiment, the straight racks 22 are connected with a support and the lifting mechanism 2 is installed on the support; An angle adjustment mechanism 3, installed on the lifting mechanism 2 and used to adjust the inclination angle of the display board 1.

[0021] In the existing display device, since the telescopic rods are used to respectively adjust the heights at both ends of the rotating shaft, it is difficult to achieve synchronous lifting, resulting in an uneven lifting process of the display board. In this solution, the two straight racks 22 are synchronously adjusted by the driving part 23, and then the support rod 21 drives the display board 1 to lift synchronously, solving the problem of uneven lifting of the display board. The inclination angle of the display board 1 is adjusted by the angle adjustment mechanism 3, improving the practicability.

[0022] Referring to Figure 4 , the specific structure of the driving part 23 is not uniquely limited in this solution. One feasible solution is that the driving part 23 includes a gear 231 meshing with the straight rack 22, the gear 231 is connected with a worm gear 232 and the worm gear 232 is connected with a worm 233. The parts of the worm 233 meshing with the two worm gears 232 have opposite helix directions. When this solution is adopted, by rotating the worm 233, the two worm gears 232 are driven to rotate synchronously, so as to synchronously lift the two straight racks 22. Due to the self-locking property of the worm gear mechanism, the display board 1 can be fixed at a specified height.

[0023] To facilitate the rotation of the worm 233, one feasible solution is as follows: The worm 233 is connected to a rotating rod 234, and a grip 235 is installed on the rotating rod 234. When this solution is adopted, by operating the grip 235, the worm 233 can be rotated conveniently and quickly.

[0024] Refer to Figure 5 , the specific structure of the angle adjustment mechanism 3 is not uniquely defined in this solution. One feasible solution is as follows: The angle adjustment mechanism 3 includes an intermediate rod 31 installed on the display board 1, and a sleeve 32 cooperating with the intermediate rod 31 is installed on the straight rack 22. When this solution is adopted, by extending or retracting the intermediate rod 31 from the sleeve 32, the display board 1 can be driven to rotate, and the inclination angle of the display board 1 can be adjusted conveniently and quickly.

[0025] To facilitate the fixation of the inclination angle of the display board 1, one feasible solution is as follows: A locking knob 33 is installed on the sleeve 32. When this solution is adopted, by tightening the locking knob 33, the intermediate rod 31 can be fixed, and thus the inclination angle of the display board 1 can be fixed.

[0026] The clamping member 11 includes a plurality of magnets adsorbed on the display board 1. When this solution is adopted, it is convenient to fix paper documents such as cost sheets on the display board 1 through the magnets.

[0027] The working principle of this embodiment: Operate the grip 235 to rotate the worm 233, drive the two worm wheels 232 and the corresponding gears 231 to rotate synchronously, so as to drive the two straight racks 22 to lift and lower synchronously, adjust the display board 1 to the preset height. After loosening the locking knob 33 and rotating the display board 1 to the preset inclination angle, tighten the locking knob 33 to fix the inclination angle of the display board 1.

[0028] To solve the problem that the lifting process of the display board is not smooth enough, in this solution, the two straight racks 22 are synchronously adjusted by the driving part 23, and then the support rod 21 drives the display board 1 to lift and lower synchronously, solving the problem that the lifting process of the display board is not smooth enough. The inclination angle of the display board 1 is adjusted by the angle adjustment mechanism 3, improving the practicability.

[0029] To facilitate the fixation of the display board 1 at a specified height, in this solution, since the driving part 23 includes a gear 231 meshing with the straight rack 22, the gear 231 is connected to a worm wheel 232 and the worm wheel 232 is connected to a worm 233, and the meshing parts of the worm 233 with the two worm wheels 232 have opposite helix directions. By rotating the worm 233, the two worm wheels 232 can be driven to rotate synchronously, so as to facilitate the synchronous lifting and lowering of the two straight racks 22. Due to the self-locking property of the worm and worm wheel mechanism, the display board 1 can be fixed at a specified height.

[0030] In order to facilitate the rotation of the worm 233, in this solution, since the worm 233 is connected to a rotating rod 234 and a grip 235 is installed on the rotating rod 234, by operating the grip 235, the worm 233 can be rotated conveniently and quickly.

[0031] The following describes the implementation process of the patent for the highway engineering cost display device of this application; (I) Device assembly; Install the lifting mechanism: Firmly connect both ends of the support rod 21 to the straight rack 22 respectively to ensure the stability and reliability of the connection part. Then, accurately mesh and install the straight rack 22 with the gear 231 in the driving part 23, so that the teeth of the gear 231 and the straight rack 22 fit tightly. Then, install the worm wheel 232 on the shaft of the gear 231 to ensure that the two are coaxial and firmly fixed. Next, install the worm 233 in the appropriate position so that the part meshing with the two worm wheels 232 makes correct contact, and the helix directions of the parts where the worm 233 meshes with the two worm wheels 232 are opposite. Finally, connect the rotating rod 234 to one end of the worm 233 and install a grip 235 on the rotating rod 234 for convenient subsequent operation. After completing the assembly of the driving part 23, connect the straight rack 22 to the support, thus completing the overall installation of the lifting mechanism 2. Connect the display board to the lifting mechanism: Rotationally connect the display board 1 to the support rod 21 to ensure that the display board 1 can rotate flexibly around the connection point with the support rod 21. At the same time, install a clamping member 11 on the display board 1, that is, adsorb a number of magnets to fix paper documents such as cost tables. Install the angle adjustment mechanism: Install a sleeve 32 that cooperates with the intermediate rod 31 at the corresponding position on the straight rack 22 to make the sleeve 32 firmly connected to the straight rack 22. Then, install the intermediate rod 31 on the display board 1 and ensure that the intermediate rod 31 can smoothly extend or retract in the sleeve 32. Install a locking knob 33 on the sleeve 32 to fix the position of the intermediate rod 31. (II) Device debugging; Lifting debugging: Manually operate the grip 235 to slowly rotate the worm 233, and observe whether the two worm wheels 232 rotate synchronously, as well as the movement of the connected gear 231 and straight rack 22. Ensure that the two straight racks 22 can be lifted and lowered synchronously, drive the support rod 21 to move smoothly, and then make the display board 1 achieve smooth lifting and lowering. If problems such as asynchronous lifting or jamming are found, promptly check the meshing situation between the gear 231 and the straight rack 22, the cooperation situation between the worm wheel 232 and the worm 233, and whether the connection parts are loose, and make corresponding adjustments and tightenings. Angle adjustment debugging: Loosen the locking knob 33, manually push the display board 1, so that the middle rod 31 extends or retracts in the sleeve 32, and observe whether the rotation of the display board 1 is flexible and smooth, and whether it can be adjusted to different inclination angles conveniently and quickly. After the inspection is completed, tighten the locking knob 33 and test whether the inclination angle of the display board 1 can be firmly fixed. If there are problems, check the matching accuracy between the middle rod 31 and the sleeve 32, as well as the locking effect of the locking knob 33, and perform necessary repairs or replace parts. (III) Specific use; Height adjustment: When it is necessary to adjust the height of the display board 1, the operator holds the grip 235 and rotates the worm 233 clockwise or counterclockwise according to the direction of the required height. The rotation of the worm 233 drives the two worm wheels 232 to rotate synchronously, and then drives the gears 231 connected thereto to rotate synchronously, and finally drives the two straight racks 22 to lift and lower synchronously. During the lifting and lowering process, observe the height change of the display board 1 until the display board 1 is adjusted to the preset height. Angle adjustment: After the display board 1 is adjusted to the preset height, if it is necessary to adjust the inclination angle of the display board 1, loosen the locking knob 33 on the sleeve 32. Then, manually rotate the display board 1 to make the middle rod 31 extend or retract correspondingly in the sleeve 32, so as to drive the display board 1 to rotate to the preset inclination angle. After the adjustment is completed, tighten the locking knob 33 again to fix the inclination angle of the display board 1. Data fixing and display: After the display board 1 is adjusted to the appropriate height and inclination angle, use the magnet of the clamping member 11 on the display board 1 to adsorb and fix paper documents such as the cost statement on the display board 1, and then the project cost information can be displayed.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A highway engineering cost display device, characterized in that: include: A display board (1), wherein a clamping member (11) is provided on the display board (1); The lifting mechanism (2) comprises a support rod (21) rotatably connected to the display board (1), both ends of the support rod (21) are connected to spur racks (22), the spur racks (22) are connected to a driving unit (23), and the driving unit (23) is used to synchronously adjust the two spur racks (22); the spur racks (22) are connected to a support and the lifting mechanism (2) is installed on the support; An angle adjustment mechanism (3) installed on the lifting mechanism (2) and used to adjust the inclination angle of the display board (1); The two spur racks (22) are synchronously adjusted by the driving part (23), so that the support rod (21) drives the display board (1) to be raised and lowered synchronously, thereby solving the problem that the display board is not smoothly raised and lowered. The inclination angle of the display board (1) is adjusted by the angle adjustment mechanism (3), thereby improving practicality.

2. A highway engineering cost display device according to claim 1, characterized in that: The driving part (23) comprises a gear (231) meshing with the spur rack (22); the gear (231) is connected to a worm wheel (232), and the worm wheel (232) is connected to a worm (233); the meshing parts of the worm (233) and the two worm wheels (232) rotate in opposite directions; by rotating the worm (233), the two worm wheels (232) are driven to rotate synchronously, so that the two spur racks (22) are raised and lowered synchronously; due to the self-locking property of the worm wheel mechanism, the display board (1) can be fixed at a specified height.

3. A highway engineering cost display device according to claim 2, characterized in that: The worm (233) is connected to a rotating rod (234), and a handle (235) is mounted on the rotating rod (234); the worm (233) can be rotated conveniently and quickly by operating the handle (235).

4. A highway engineering cost display device according to claim 1, characterized in that: The angle adjustment mechanism (3) comprises an intermediate rod (31) mounted on the display board (1), and a sleeve (32) matched with the intermediate rod (31) is mounted on the spur rack (22); the intermediate rod (31) is extended or retracted from the sleeve (32), thereby driving the display board (1) to rotate, so that the inclination angle of the display board (1) can be adjusted conveniently and quickly.

5. A highway engineering cost display device according to claim 4, characterized in that: A locking knob (33) is mounted on the sleeve (32); by tightening the locking knob (33), the intermediate rod (31) can be fixed, thereby fixing the inclination angle of the display board (1).

6. A highway engineering cost display device according to claim 1, characterized in that: The clamping member (11) comprises a plurality of magnets adsorbed on the display board (1); the magnets facilitate fixing paper items such as a cost table on the display board (1).

7. An operating method of the highway engineering cost display device according to claim 1, characterized in that: The operation process is as follows:

1. Device assembly; Install the lifting mechanism: firmly connect the two ends of the support rod (21) to the spur rack (22) respectively, and ensure that the connection parts are stable and reliable; then, accurately mesh the spur rack (22) with the gear (231) in the driving part (23) so that the teeth of the gear (231) and the spur rack (22) fit tightly; then, install the worm wheel (232) on the shaft of the gear (231), and ensure that the two are coaxial and firmly fixed; then install the worm (233) in a suitable position so that the meshing parts of the worm wheels (232) are in correct contact, and the meshing parts of the worm (233) and the two worm wheels (232) rotate in opposite directions. ; Finally, the rotating rod (234) is connected to one end of the worm (233), and a handle (235) is installed on the rotating rod (234) to facilitate subsequent operations; after the assembly of the driving part (23) is completed, the spur rack (22) is connected to the support, thereby completing the overall installation of the lifting mechanism (2); (ii) connecting the display board and the lifting mechanism: the display board (1) is rotatably connected to the support rod (21) to ensure that the display board (1) can flexibly rotate around the connection point with the support rod (21); at the same time, a clamping member (11) is installed on the display board (1), that is, a plurality of magnets are adsorbed to fix paper items such as cost tables; (iii) installing the angle adjustment mechanism: installing a sleeve (32) matching the intermediate rod (31) at a corresponding position on the spur rack (22) so that the sleeve (32) and the spur rack (22) are firmly connected; then, installing the intermediate rod (31) on the display board (1) and ensuring that the intermediate rod (31) can be smoothly extended or retracted in the sleeve (32); installing a locking knob (33) on the sleeve (32) to fix the position of the intermediate rod (31); (IV) Lifting and lowering debugging: manually operate the handle (235) to slowly rotate the worm (233) and observe whether the two worm wheels (232) rotate synchronously, as well as the movement of the gear (231) and the spur rack (22) connected thereto; ensure that the two spur racks (22) can be raised and lowered synchronously, drive the support rod (21) to move smoothly, and thus enable the display board (1) to be raised and lowered smoothly; if problems such as lifting asynchronism or jamming are found, promptly check the meshing of the gear (231) and the spur rack (22), the matching of the worm wheel (232) and the worm (233), and whether the various connecting parts are loose, and make corresponding adjustments and tightening; (V) Angle adjustment and debugging: Loosen the locking knob (33), manually push the display board (1), make the intermediate rod (31) extend or retract in the sleeve (32), and observe whether the rotation of the display board (1) is flexible and smooth, and whether it can be adjusted to different inclination angles conveniently and quickly; after the inspection is completed, tighten the locking knob (33) to test whether the inclination angle of the display board (1) can be firmly fixed; if there is a problem, check the matching accuracy of the intermediate rod (31) and the sleeve (32), as well as the locking effect of the locking knob (33), and carry out necessary repairs or replace parts; (vi) Height adjustment: When the height of the display board (1) needs to be adjusted, the operator holds the handle (235) and rotates the worm (233) clockwise or counterclockwise according to the direction of the required height; the rotation of the worm (233) drives the two worm wheels (232) to rotate synchronously, thereby causing the gear (231) connected thereto to rotate synchronously, and finally drives the two spur racks (22) to rise and fall synchronously; during the lifting process, the height change of the display board (1) is observed until the display board (1) is adjusted to a preset height; (VII) Angle adjustment: After the display board (1) is adjusted to a preset height, if the inclination of the display board (1) needs to be adjusted, loosen the locking knob (33) on the sleeve (32); then, manually rotate the display board (1) so that the intermediate rod (31) extends or retracts in the sleeve (32) accordingly, thereby driving the display board (1) to rotate to a preset inclination; after the adjustment is completed, tighten the locking knob (33) again to fix the inclination of the display board (1); (VIII) Fixing and displaying materials: After the display board (1) is adjusted to a suitable height and inclination, paper materials such as a cost table are fixed to the display board (1) by adsorption using the magnet of the clamping member (11) on the display board (1), so that the project cost information can be displayed.

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