A geographic information surveying and mapping device and a surveying and mapping method thereof

Abstract

The present invention discloses a geographic information surveying and mapping device and a surveying and mapping method thereof, and relates to the field of geographic information surveying and mapping technology. The geographic information surveying and mapping device and the surveying and mapping method thereof include a geographic surveying and mapping mechanism, and the geographic surveying and mapping mechanism includes a flatbed car, the top of the flatbed car is fixedly connected with the geographic information surveying and mapping device, the bottom of the flatbed car is fixedly connected with rollers, the outer wall of the flatbed car is fixedly connected with a placement and stabilization mechanism, and the outer wall of the roller is fixedly connected with an impurity cleaning mechanism. The geographic information surveying and mapping device and the surveying and mapping method thereof, by rotating the second bolt, the bottoms of the folding rods are interlaced with each other, and then the insertion thorns are inserted into the ground, which further ensures the fixation of the geographic information surveying and mapping device, and the interlacing of the folding rods is aimed at harder soil, and the folding rods can be stuck on the soil to provide a stable support for the flatbed car, and the movement of the folding rods will drive the movement of the extrusion plate.

Description

Technical Field

[0001] The present invention relates to the technical field of geographic information surveying and mapping, and in particular to a geographic information surveying and mapping device and a surveying and mapping method thereof. Background Art

[0002] Simply speaking, geographic information engineering surveying and mapping equipment refers to instruments and devices designed and manufactured for data collection, processing, and output for surveying and mapping operations;

[0003] By citing the existing national patent application for comparison, the patent application with patent application number 202011383251.4 discloses a geographic information engineering surveying and mapping device, wherein a rotatable push rod is connected to the lower end of the circular support platform, the lower end of the push rod is fixed on the rotating control box, the rotating control box is fixed on the control base plate, a geographic information control panel is arranged inside the control base plate, and a fixed chassis is arranged at the four corners of the lower end of the control base plate; a rotating motor, a motor driver and a motor controller are arranged inside the rotating control box; the rotating motor, the motor driver and the motor controller are connected in sequence; the rotating motor can drive the push rod to rotate; a circular card table of a surveying instrument is placed on the circular support platform, and handles are symmetrically arranged on both sides of the circular card table of the surveying instrument; the fixed chassis can be sucked onto the roof;

[0004] The above patent has the functions of waterproof, rainproof and dustproof by designing a circular card table and support, remote wireless control and battery. However, in the process of geographic information surveying and mapping, a long time of surveying and mapping is required. The weeds or mud at the required detection location will affect the level of the surveying and mapping device, resulting in inconsistency in the surveying and mapping data. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a geographic information surveying and mapping device and a surveying and mapping method thereof to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a geographic information surveying and mapping device, comprising a geographic surveying and mapping mechanism, the geographic surveying and mapping mechanism comprising a flatbed car, the top of the flatbed car is fixedly connected to the geographic information surveying and mapping device, the bottom of the flatbed car is fixedly connected to a roller, the outer wall of the flatbed car is fixedly connected to a placement and stabilization mechanism, and the outer wall of the roller is fixedly connected to an impurity cleaning mechanism;

[0007] The placement and stabilization mechanism comprises a working compartment, and the top of the flatbed vehicle is fixedly connected with the working compartment;

[0008] A first bolt, a hole is opened on the top of the working chamber, a thread is arranged in the hole of the working chamber, and the first bolt is inserted into the hole of the working chamber, and the working chamber and the first bolt are threadedly connected;

[0009] The bottom of the first bolt is fixedly connected with a conical block, the bottom of the first bolt is also fixedly connected with a spiral rod, and the end of the spiral rod is fixedly connected with an oblique thorn

[0010] Preferably, the impurity cleaning mechanism includes a bearing, and the top of the working chamber is rotatably connected to the outer wall of the bearing.

[0011] Preferably, the outer wall of the bearing is rotatably connected to two folding rods, and the two folding rods are staggered with each other.

[0012] Preferably, the bottom of the folding rod is fixedly connected with a snap-in thorn, and the top of the folding rod is provided with a hole.

[0013] Preferably, a thread groove is provided in the hole of the folding rod, a second bolt is inserted into the hole of the folding rod, and the second bolt is threadedly connected to the hole of the folding rod.

[0014] Preferably, the outer wall of the folding rod is fixedly connected to two extrusion plates at a position inside the working bin, and an airbag is fixedly connected to a position inside the working bin and between the two extrusion plates, and the airbag is in active contact with the extrusion plates.

[0015] Preferably, a cutting plate is fixedly connected to the outer wall of the roller, and cutting spikes are fixedly connected to the outer wall of the cutting plate.

[0016] A surveying and mapping method of a geographic information surveying and mapping device, comprising the following steps:

[0017] S1, the flatbed car moves to the desired position through rollers;

[0018] S2. When the flatbed truck moves, the roller drives the cutting board to rotate. The cutting board and the cutting thorns cut the higher plants on the ground. When the roller moves back and forth, the cutting thorns cut the weeds many times, so that the weeds are cut and crushed. The roller then moves to the position where the weeds are cut. The weeds will not affect the level of the roller.

[0019] S3, then rotate the first bolt, and after the first bolt rotates down, it penetrates into the ground through the conical block. The first bolt will rotate to the required length according to the terrain, and the conical block penetrates into the ground, which will increase the stability with the ground;

[0020] S4. During the rotation of the first bolt, the spiral rod rotates accordingly. The oblique thorn is arranged at the end of the spiral rod. When encountering a sandy ground, the oblique thorn rotates along with the spiral rod and penetrates into the sand. Then, the spiral rod continues to be inserted into the sand following the oblique thorn.

[0021] S5. During the rotation of the second bolt, the thread grooves on the tops of the two folding rods are in opposite directions. When the second bolt rotates, the tops of the two folding rods will approach each other, and then under the setting of the bearing, the bottoms of the folding rods will intersect with each other. When the bottoms of the folding rods approach each other, they drive the inserted thorns to penetrate into the ground;

[0022] S6. When the folding rods are staggered, the outer walls of the folding rods will approach each other, thereby driving the two extrusion plates to approach each other. When the extrusion plates approach each other, the airbags are squeezed, thereby causing the gas in the airbags to be discharged. When the gas is discharged, the airflow is blown downward and blows to the ground. The flow of the airflow will drive the plastic garbage and dust on the ground away, so that the inserted thorns can be directly inserted into the ground;

[0023] S7. The geographic information surveying and mapping device surveys and maps the geographic information. After the surveying and mapping is completed, rotating the first bolt and the second bolt will loosen the inserted thorn and the first bolt, thereby pushing the flatbed truck to move.

[0024] The present invention provides a geographic information surveying and mapping device and a surveying and mapping method thereof. The present invention provides the following beneficial effects:

[0025] 1. The geographic information surveying and mapping device and the surveying and mapping method thereof play a role of supporting the flatbed car by rotating the first bolt to the ground, and the length of the first bolt can be extended and shortened according to the terrain, ensuring contact with the ground, thereby ensuring support for the flatbed car, and the first bolt drives the conical block to penetrate into the ground, and the spiral rod follows the rotation of the first bolt. When it is aimed at sandy soil, it can be inserted into the sand to fix the flatbed car, ensuring the temperature of the flatbed car. When encountering hard soil, the spiral rod will reduce the pitch due to its own elasticity and only support it through the first bolt.

[0026] 2. The geographic information surveying and mapping device and the surveying and mapping method thereof, by rotating the second bolt, make the bottoms of the folding rods intertwine with each other, and then make the insertion spikes insert into the ground, further ensuring the fixation of the geographic information surveying and mapping device, and the interlacing of the folding rods is aimed at harder soil, the folding rods can be stuck on the soil, and provide a stable support for the flatbed truck, the movement of the folding rods will drive the movement of the extrusion plate, the extrusion plate squeezes the airbag, and then the blowing of the airflow in the airbag will clean the dust and plastic waste at the position of the insertion spike, ensuring that the insertion spike inserts into the ground.

[0027] 3. The geographic information mapping device and the mapping method thereof are characterized in that the cutting plate is arranged on the roller, and the cutting plate and the cutting thorns are driven to cut the weeds when the roller rolls, thereby preventing the weeds from affecting the height of the roller and ensuring the levelness of the flatbed vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the axial side stereoscopic structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-sectional structure of the middle airbag position;

[0030] Figure 3 For the present invention Figure 1 Schematic diagram of the cross-sectional structure of the middle folding rod position;

[0031] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0032] Figure 5 For the present invention Figure 3 The enlarged structural diagram of the middle B part;

[0033] Figure 6 It is a bottom-up three-dimensional structural schematic diagram of the present invention;

[0034] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of part C in the middle.

[0035] In the figure: 1. geographic surveying and mapping mechanism; 11. geographic information surveying and mapping device; 12. flatbed car; 13. roller; 2. placement and stabilization mechanism; 21. working chamber; 22. first bolt; 23. spiral rod; 24. conical block; 25. oblique thorn; 3. impurity cleaning mechanism; 31. second bolt; 32. bearing; 33. folding rod; 34. extrusion plate; 35. insertion thorn; 36. cutting plate; 37. cutting thorn; 38. air bag. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] See also Figure 1-7 The present invention provides a technical solution: a geographic information surveying and mapping device, comprising a geographic surveying and mapping mechanism 1, the geographic surveying and mapping mechanism 1 comprises a flatbed car 12, the top of the flatbed car 12 is fixedly connected with a geographic information surveying and mapping device 11, the bottom of the flatbed car 12 is fixedly connected with a roller 13, the outer wall of the flatbed car 12 is fixedly connected with a placing and stabilizing mechanism 2, and the outer wall of the roller 13 is fixedly connected with an impurity cleaning mechanism 3;

[0039] The placing and stabilizing mechanism 2 includes a working chamber 21, and the top of the flatbed trolley 12 is fixedly connected with the working chamber 21. When the flatbed trolley 12 moves, the roller 13 drives the rotation of the cutting plate 36, and the cutting plate 36 and the cutting thorns 37 cut the higher plants on the ground. When the roller 13 moves back and forth, the cutting thorns 37 cut the weeds for many times, so that the weeds are cut and crushed. The roller 13 then moves to the position where the weeds are cut, and the weeds will not affect the level of the roller 13.

[0040] The first bolt 22, a hole is provided on the top of the working chamber 21, a thread is provided in the hole of the working chamber 21, and the first bolt 22 is inserted into the hole of the working chamber 21, and the working chamber 21 and the first bolt 22 are threadedly connected, and the first bolt 22 is rotated, and the first bolt 22 is rotated and descended and penetrated into the ground through the conical block 24, and the first bolt 22 will rotate to the required length following the terrain, and the conical block 24 penetrates into the ground, which will increase the stability with the ground. During the rotation of the first bolt 22, the spiral rod 23 rotates accordingly, and the oblique thorn 25 is arranged at the end of the spiral rod 23. When encountering a sandy ground, the oblique thorn 25 rotates and penetrates into the sand following the spiral rod 23, and then the spiral rod 23 continues to be inserted into the sand following the oblique thorn 25;

[0041] The spiral rod 23 and the bottom of the first bolt 22 are fixedly connected with a conical block 24. The first bolt 22 rotates to the ground to support the flatbed 12. The length of the first bolt 22 can be extended or shortened according to the terrain to ensure contact with the ground and support for the flatbed 12. The first bolt 22 drives the conical block 24 to penetrate the ground. The spiral rod 23 follows the rotation of the first bolt 22. When it is in sandy soil, it can be inserted into the sand to fix the flatbed 12 to ensure the temperature of the flatbed 12. When encountering hard soil, the spiral rod 23 will reduce its pitch under its own elasticity and only support it through the first bolt 22. The bottom of the first bolt 22 is also fixedly connected with the spiral rod 23, and the end of the spiral rod 23 is fixedly connected with an oblique thorn 25

[0042] Specifically, the impurity cleaning mechanism 3 includes a bearing 32 , and the top of the working chamber 21 is rotatably connected to the outer wall of the bearing 32 .

[0043] Specifically, the outer wall of the bearing 32 is rotatably connected to two folding rods 33. The second bolt 31 is rotated to make the bottoms of the folding rods 33 intertwine with each other, so that the insertion spikes 35 are inserted into the ground, further ensuring the fixation of the geographic information surveying and mapping device 11. In addition, the interlacing of the folding rods 33 is aimed at harder soil. The folding rods 33 can be stuck on the soil to provide stable support for the flatbed truck 12. The movement of the folding rods 33 will drive the movement of the extrusion plate 34, and the extrusion plate 34 will squeeze the airbag 38, and the blowing of the airflow in the airbag 38 will clean the dust and plastic waste at the position of the insertion spike 35, ensuring that the insertion spike 35 is inserted into the ground, and the two folding rods 33 are interlaced with each other.

[0044] Specifically, the bottom of the folding rod 33 is fixedly connected with a snap-in spike 35 , and the top of the folding rod 33 is provided with a hole.

[0045] Specifically, a threaded groove is provided in the hole of the folding rod 33, and a second bolt 31 is inserted into the hole of the folding rod 33. During the rotation of the second bolt 31, the threaded grooves at the tops of the two folding rods 33 are in opposite directions. When the second bolt 31 rotates, the tops of the two folding rods 33 will approach each other, and then under the setting of the bearing 32, the bottoms of the folding rods 33 will be staggered with each other. When the bottoms of the folding rods 33 approach, they drive the insertion spikes 35 to penetrate into the ground, and the second bolt 31 is threadedly connected to the hole of the folding rod 33.

[0046] Specifically, the outer wall of the folding rod 33 is located inside the working chamber 21 and is fixedly connected to two extrusion plates 34. When the folding rods 33 are staggered, the outer walls of the folding rods 33 will approach each other, thereby driving the two extrusion plates 34 to approach each other. When the extrusion plates 34 approach each other, the airbag 38 is squeezed, thereby causing the gas in the airbag 38 to be discharged. When the gas is discharged, the airflow is blown downward and blows to the ground. The flow of the airflow will drive the plastic garbage and dust on the ground away, so that the insertion spikes 35 can be directly inserted into the ground. The airbag 38 is fixedly connected to the position inside the working chamber 21 and located between the two extrusion plates 34, and the airbag 38 is in active contact with the extrusion plates 34.

[0047] Specifically, a cutting plate 36 is fixedly connected to the outer wall of the roller 13 , and a cutting spike 37 is fixedly connected to the outer wall of the cutting plate 36 .

[0048] A surveying and mapping method of a geographic information surveying and mapping device, comprising the following steps:

[0049] S1, the flatbed trolley 12 is moved to the desired position by the rollers 13;

[0050] S2. During the movement of the flatbed vehicle 12, the roller 13 drives the cutting plate 36 to rotate, and the cutting plate 36 and the cutting thorns 37 cut the higher plants on the ground. Under the back and forth movement of the roller 13, the cutting thorns 37 cut the weeds for many times, so that the weeds are cut and crushed. The roller 13 then moves to the position where the weeds are cut, and the weeds will not affect the level of the roller 13;

[0051] S3, then rotate the first bolt 22, and the first bolt 22 will rotate down and penetrate into the ground through the conical block 24. The first bolt 22 will rotate to the required length according to the terrain, and the conical block 24 will penetrate into the ground, which will increase the stability with the ground;

[0052] S4. During the rotation of the first bolt 22, the spiral rod 23 rotates accordingly. The oblique thorn 25 is arranged at the end of the spiral rod 23. When encountering a sandy ground, the oblique thorn 25 rotates along with the spiral rod 23 and penetrates into the sand. Then, the spiral rod 23 continues to be inserted into the sand following the oblique thorn 25.

[0053] S5. During the rotation of the second bolt 31, the thread grooves at the tops of the two folding rods 33 are in opposite directions. When the second bolt 31 rotates, the tops of the two folding rods 33 are close to each other, and then under the setting of the bearing 32, the bottoms of the folding rods 33 are intertwined with each other. When the bottoms of the folding rods 33 are close to each other, they drive the inserted spikes 35 to penetrate into the ground.

[0054] S6. When the folding rods 33 are staggered, the outer walls of the folding rods 33 will approach each other, thereby driving the two extrusion plates 34 to approach each other. When the extrusion plates 34 approach each other, they squeeze the airbag 38, thereby discharging the gas in the airbag 38. When the gas is discharged, the airflow is blown downward and blows to the ground. The flow of the airflow will drive the plastic garbage and dust on the ground away, so that the insertion spikes 35 can be directly inserted into the ground;

[0055] S7. The geographic information surveying and mapping device 11 surveys and maps the geographic information. After the surveying and mapping is completed, rotating the first bolt 22 and the second bolt 31 will loosen the inserted spike 35 and the first bolt 22, thereby pushing the flatbed vehicle 12 to move.

[0056] When in use, the flatbed trolley 12 is moved to the desired position by the roller 13. During the movement of the flatbed trolley 12, the roller 13 will drive the rotation of the cutting plate 36, and the cutting plate 36 and the cutting spikes 37 will cut the higher plants on the ground. Under the back and forth movement of the roller 13, the cutting spikes 37 will cut the weeds multiple times, so that the weeds are cut and crushed. The roller 13 moves to the position where the weeds are cut, and the weeds will not affect the level of the roller 13. At this time, the first bolt 22 is rotated. After the first bolt 22 rotates and descends, it will penetrate into the ground through the conical block 24. The first bolt 22 will rotate to the desired length following the terrain. The conical block 24 penetrates into the ground, which will increase the stability with the ground. During the rotation of the first bolt 22, the spiral rod 23 follows the rotation. The oblique spike 25 is set at the end of the spiral rod 23. When encountering a sandy ground, the oblique spike 25 follows the spiral rod 23 to rotate and penetrate into the sand, and then the spiral rod 23 continues to be inserted into the sand following the oblique spike 25. When the second bolt 31 is rotated, the thread grooves at the tops of the two folding rods 33 are in opposite directions. When the second bolt 31 rotates, the tops of the two folding rods 33 will approach each other, and then under the setting of the bearing 32, the bottoms of the folding rods 33 will be staggered with each other. When the bottoms of the folding rods 33 are approaching, the inserted thorns 35 are driven to penetrate into the ground. Moreover, when the folding rods 33 are staggered, the outer walls of the folding rods 33 will approach, thereby driving the two extrusion plates 34 to approach each other. When the extrusion plates 34 approach each other, the airbags 38 are squeezed, thereby discharging the gas in the airbags 38. When the gas is discharged, the airflow is blown downward, and the airflow blows to the ground. The flow of the airflow will drive the plastic garbage and dust on the ground away, so that the inserted thorns 35 can be directly stuck on the ground, and then the geographic information surveying and mapping device 11 maps the geographic information. After the mapping is completed, rotating the first bolt 22 and the second bolt 31 will loosen the inserted thorns 35 and the first bolt 22, thereby pushing the flatbed trolley 12 to move.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A geographic information surveying and mapping device, comprising a geographic surveying and mapping mechanism (1), the geographic surveying and mapping mechanism (1) comprising a flatbed vehicle (12), the top of the flatbed vehicle (12) being fixedly connected to the geographic information surveying and mapping device (11), the bottom of the flatbed vehicle (12) being fixedly connected to a roller (13), characterized in that: The outer wall of the flatbed vehicle (12) is fixedly connected with a placement and stabilization mechanism (2), and the outer wall of the roller (13) is fixedly connected with an impurity cleaning mechanism (3); The placement and stabilization mechanism (2) comprises a working compartment (21), and the top of the flatbed vehicle (12) is fixedly connected to the working compartment (21); A first bolt (22), wherein a hole is provided at the top of the working chamber (21), a thread is provided in the hole of the working chamber (21), and the first bolt (22) is inserted into the hole of the working chamber (21), and the working chamber (21) and the first bolt (22) are threadedly connected; The screw rod (23) is fixedly connected to a conical block (24) at the bottom of the first bolt (22), and the screw rod (23) is also fixedly connected to the bottom of the first bolt (22). The end of the screw rod (23) is fixedly connected to an oblique thorn (25). The impurity cleaning mechanism (3) comprises a bearing (32). The top of the working chamber (21) is rotatably connected to the outer wall of the bearing (32). The outer wall of the bearing (32) is rotatably connected to two folding rods (33), and the two folding rods (33) are staggered with each other. The bottom of each folding rod (33) is fixedly connected to a snap-in thorn (35). The top of the folding rod (33) is provided with a hole. A thread groove is provided in the hole of the folding rod (33); a second bolt (31) is inserted into the hole of the folding rod (33), and the second bolt (31) is threadedly connected to the hole of the folding rod (33); two extrusion plates (34) are fixedly connected to the outer wall of the folding rod (33) at a position inside the working bin (21); an air bag (38) is fixedly connected to a position inside the working bin (21) and between the two extrusion plates (34); the air bag (38) is in active contact with the extrusion plate (34); a cutting plate (36) is fixedly connected to the outer wall of the roller (13); and a cutting thorn (37) is fixedly connected to the outer wall of the cutting plate (36); The second bolt (31) is rotated to make the bottoms of the folding rods (33) intersect with each other, thereby causing the insertion spikes (35) to be inserted into the ground. The movement of the folding rods (33) drives the movement of the squeezing plate (34), and the squeezing plate (34) squeezes the airbag (38), thereby blowing out the airflow in the airbag (38) to clean the dust and plastic waste at the position of the insertion spikes (35), thereby ensuring that the insertion spikes (35) are inserted into the ground and the two folding rods (33) are intersect with each other.

2. A method for surveying and mapping using the geographic information surveying and mapping device according to claim 1, characterized in that: The steps are, S1, the flatbed cart (12) is moved to a desired position via rollers (13); S2. During the movement of the flatbed vehicle (12), the roller (13) drives the cutting plate (36) to rotate, and the cutting plate (36) and the cutting thorns (37) cut the higher plants on the ground. As the roller (13) moves back and forth, the cutting thorns (37) cut the weeds multiple times, so that the weeds are cut and crushed. The roller (13) then moves to the position where the weeds are cut, and the weeds do not affect the level of the roller (13); S3, then rotating the first bolt (22), the first bolt (22) rotates down and penetrates into the ground through the conical block (24), the first bolt (22) rotates to a desired length following the terrain, and the conical block (24) penetrates into the ground, which increases the stability with the ground; S4. During the rotation of the first bolt (22), the spiral rod (23) rotates accordingly. The oblique thorn (25) is arranged at the end of the spiral rod (23). When encountering a sandy ground, the oblique thorn (25) rotates along with the spiral rod (23) and penetrates into the sand. Then, the spiral rod (23) continues to be inserted into the sand following the oblique thorn (25). S5. During the rotation of the second bolt (31), the thread grooves at the tops of the two folding rods (33) are in opposite directions. When the second bolt (31) rotates, the tops of the two folding rods (33) are close to each other, and then under the setting of the bearing (32), the bottoms of the folding rods (33) are intertwined with each other. When the bottoms of the folding rods (33) are close to each other, they drive the insertion spikes (35) to penetrate into the ground; S6. When the folding rods (33) are interlaced, the outer walls of the folding rods (33) are brought closer together, thereby driving the two extrusion plates (34) to move closer together. When the extrusion plates (34) move closer together, the airbag (38) is squeezed, thereby causing the gas in the airbag (38) to be discharged. When the gas is discharged, the airflow is blown downward and onto the ground. The flow of the airflow drives the plastic garbage and dust on the ground away, so that the insertion spikes (35) can be directly inserted into the ground. S7. The geographic information surveying and mapping device (11) surveys and maps the geographic information. After the surveying and mapping is completed, the first bolt (22) and the second bolt (31) are rotated to loosen the inserted thorn (35) and the first bolt (22), thereby pushing the flatbed vehicle (12) to move.

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