A terrain flatness measuring device for urban planning

Abstract

The invention relates to the technical field of flatness measurement, and proposes a terrain flatness measuring device for urban planning, which can form a fixed point large-scale measurement of terrain flatness, and can also form a mobile traveling measurement, has richer measurement modes, better practicality, more convenient operation, and higher measurement efficiency. The device comprises a frame and a measurement comparison component, wherein an autonomously adjustable middle column is installed in the frame, a threaded column is fixedly connected to the bottom end of the autonomously adjustable middle column, and a counterweight ball is fixedly connected to the bottom end of the threaded column, and the measurement comparison component comprises a lifting platform, a threaded barrel is fixedly connected in the lifting platform, the threaded barrel is threadedly connected to the threaded column, and a limit frame is connected to the threaded barrel through a limit spring, and the limit frame matches the autonomously adjustable middle column, and three hinge interfaces are provided on the lifting platform, a rotating frame is rotatably connected in the three hinge interfaces, and laser rangefinders are installed on the three rotating frames, an adjusting sleeve is externally threadedly connected to the threaded barrel, and a synchronous pulling frame is rotatably connected to the outside of the adjusting sleeve.

Description

Technical Field

[0001] The present invention relates to the technical field of flatness measurement, and in particular to a terrain flatness measuring device for urban planning. Background Art

[0002] As we all know, in the process of urban planning and construction, the terrain is usually sorted out, especially to determine the corresponding project sites for buildings, roads or green spaces. In order to facilitate the processing during the terrain leveling process and the verification of the terrain after leveling, we propose a terrain flatness measurement device for urban planning.

[0003] After searching, the Chinese patent publication number CN116147468A discloses a terrain flatness measuring device for urban planning, which is roughly described as comprising a frame, fixed guide rails are installed on the left and right sides of the top of the frame near the rear, and indicator components are installed on the top of the fixed guide rails. Fixed tubes located below the fixed guide rails are embedded on the left and right sides of the top of the frame. When in use, the device converts the up and down displacement into the relative distance or relative proximity of the guide blocks, and converts the relative proximity or relative distance of the guide blocks into pressure to achieve the movement of the colored liquid. The flatness of the ground is directly obtained by combining the colored liquid input into the first temporary storage tank and the second temporary storage tank with the scale on the outer surface. The Chinese patent publication number CN117190968A discloses A terrain flatness measuring device for land planning is roughly described as including a workbench, a lifting component symmetrically arranged on the workbench, a cleaning component fixedly connected to the lifting component, a flatness measuring mechanism fixedly connected to the workbench, the flatness measuring mechanism is used to measure the flatness of the terrain, and an angle measuring mechanism symmetrically arranged at the bottom end of the workbench, the angle measuring mechanism fixedly connected to the workbench. When in use, when measuring the flatness of the terrain, the position of the angle measuring mechanism is adjusted so that the angle measuring mechanism does not contact the ground, the distance-adjusting electric push rod adjusts the position of the flatness measuring mechanism so that the measuring roller fits the terrain to be measured, and the staff pushes the device to measure the flatness of the terrain. The measuring roller marks the area where the flatness does not meet the requirements, and transmits the unqualified data to the staff at the same time.

[0004] Although both of the above-mentioned two sets of existing technical solutions can realize the measurement of terrain flatness, they need to drive past the measurement location before they can realize the measurement, and are affected by the wheel support driving. Once the multiple support points formed by the support contact of multiple wheels are poorly flat, it is very easy to cause the frame or workbench to deflect or swing, which is very likely to affect the measurement operation and measurement accuracy. The measurement convenience and measurement reliability need to be further improved. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a terrain flatness measuring device for urban planning, which can perform large-scale fixed-point measurement of terrain flatness, and can also perform mobile traveling measurement. It has richer measurement modes, better practicality, more convenient operation, and higher measurement efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a terrain flatness measuring device for urban planning, comprising a frame and a measurement and comparison component, wherein an autonomously adjustable central column is installed in the frame, and the bottom end of the autonomously adjustable central column is fixedly connected to a threaded column, and the bottom end of the threaded column is fixedly connected to a counterweight ball, and the measurement and comparison component comprises a lifting platform, a threaded cylinder is fixedly connected in the lifting platform, the threaded cylinder is threadedly connected to the threaded column, and the threaded cylinder is connected to a limiting frame through a limit spring, and the limit frame matches the autonomously adjustable central column, and three hinge interfaces are provided on the lifting platform, and a rotating frame is rotatably connected in the three hinge interfaces, and laser rangefinders are installed on the three rotating frames, and an adjusting sleeve is externally threadedly connected to the threaded cylinder, and a synchronous pull frame is externally rotatably connected to the adjusting sleeve, and the synchronous pull frame is hinged with three transmission plates, and the three transmission plates are respectively hinged to the three rotating frames.

[0007] Preferably, the limit frame is fixedly connected to an outer end plate, the limit spring is fixedly connected to the outer end plate, and the limit spring is fixedly connected to a rotating ring, the rotating ring is rotatably connected to a fixed guide cylinder, and a transfer groove matching the limit frame is provided in the fixed guide cylinder, and a limit opening and a through opening are provided in the transfer groove, the limit opening is used for the insertion limit of the limit frame, and the through opening is used for the passage of the limit frame, a friction limit surface is provided at one end of the limit frame close to the threaded column, and the fixed guide cylinder is fixedly connected to the threaded cylinder.

[0008] Preferably, the frame includes an outer ring frame, a rotating frame is rotatably connected to the outer ring frame, the self-adjusting middle column is rotatably connected to the rotating frame, and the outer ring frame and the rotating frame are both threadedly connected with clamping bolts, and limiting rings are provided on the self-adjusting middle column and the rotating frame, and the two limiting rings are respectively matched with the two clamping bolts, and a rotating support structure is installed outside the outer ring frame.

[0009] Preferably, the swivel structure includes three swivel legs and three external frames, the three swivel legs are fixedly connected to a shaft cylinder, the three external frames are fixedly connected to the outer ring frame, the three shaft cylinders are rotatably connected in the three external frames, the three external frames are slidably connected with synchronization racks, the three synchronization racks are engaged with synchronization gears, the three synchronization gears are fixedly connected to the three swivel legs respectively, the bottom ends of the three synchronization racks are fixedly connected to synchronization rings, a threaded rod is installed on an external frame on the right, and a synchronization rack on the right is rotatably connected to the threaded rod.

[0010] Preferably, an outrigger is fixedly connected to one of the external frames on the right side, and two opposing shift blocks are slidably connected inside the outrigger. A first screw groove and a second screw groove are respectively provided in the two opposing shift blocks, and the first screw groove and the second screw groove are both matched with the threaded rod. An adjustment limit assembly is installed in the outrigger, and the adjustment limit assembly is used for relative contact adjustment limit and relative distance adjustment limit of the two opposing shift blocks.

[0011] Preferably, the adjustment limit assembly includes a shift frame, which is rotatably connected to the outrigger frame, and the two shift blocks are fixedly connected to a transmission rod. Two strip openings are opened on the shift frame, and the two transmission rods are respectively inserted into the two strip openings. The shift frame is connected to a positioning spring, and the positioning spring is connected to the outrigger frame.

[0012] Preferably, the bottom ends of the three swivel legs are fixedly connected to the bottom supports, the three bottom supports are rotatably connected to the swivel brackets, the three swivel brackets are fixedly connected to the ball wheel sleeves, the three ball wheel sleeves are installed with spherical wheels, the three bottom supports are installed with storage springs, the three storage springs are respectively connected to the three swivel brackets, the three swivel brackets are fixedly connected to the outriggers, the three outriggers are fixedly connected to the traction ropes, the three traction ropes pass through the three swivel legs respectively, the three shaft cylinders are provided with lead-out holes matching the traction ropes, the outer ring frame is installed with a storage swivel rack, the three traction ropes are installed on the storage swivel rack, and the outer ring frame is installed with an adjustment mechanism matching the storage swivel rack.

[0013] Preferably, the adjustment mechanism includes a drive shaft gear and a transmission gear ring, the transmission gear ring is fixedly connected to the storage rotary frame, the drive shaft gear is rotatably connected to the outer ring frame, the drive shaft gear is meshed with the transmission gear ring, and a threaded hole is opened on the drive shaft gear, and a limiting screw is threadedly connected in the threaded hole.

[0014] Preferably, the adjusting sleeve, the limiting screw and the two clamping bolts are all fixedly connected with an auxiliary rotating cap ring, three rope inlets are opened on the outer ring frame, and the three rope inlets are respectively matched with the three traction ropes, a hand-held ring is fixedly connected to the outer ring frame, and an auxiliary adjustment club is fixedly connected to the self-adjusting middle column.

[0015] Preferably, the shifting frame, the outrigger, the three bottom supports and the three rotating brackets are all rotatably connected with rotating connecting blocks, and the eight rotating connecting blocks are respectively fixedly connected to the two ends of the positioning spring and the two ends of the three storage springs.

[0016] Compared with the prior art, the present invention provides a terrain flatness measurement device for urban planning, which has the following beneficial effects:

[0017] (1) In the present invention, by designing a measurement comparison component, the terrain flatness of the supporting urban planning land is formed into a corresponding data measurement and acquisition functional component, the measurement mode is more abundant, the measurement range can be adjusted, and the measurement efficiency is higher.

[0018] (2) In the present invention, a matching bracket installation structure is formed for the measurement and comparison component through the design of the frame, which can form a corresponding bracket installation structure for the measurement and comparison component, facilitate the fixed-point support and mobile travel of the measurement and comparison component, and can form fixed-point measurement of terrain flatness, and can also form mobile travel measurement, which is more practical and more convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 Schematic diagram of the local enlarged structure at A in the middle;

[0021] Figure 3 For the present invention Figure 1 Schematic diagram of the local enlarged structure at B in the middle;

[0022] Figure 4 For the present invention Figure 1 Schematic diagram of the local enlarged structure at C in the middle;

[0023] Figure 5 This is a schematic diagram of the exploded three-dimensional structure of the lifting platform and the threaded barrel of the present invention;

[0024] Figure 6 This is a schematic diagram of the exploded three-dimensional structure of the threaded barrel, the adjusting sleeve and the synchronous puller of the present invention;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the present invention that autonomously adjusts the coordination of the center column, outer ring frame, and rotating frame;

[0026] Figure 8 It is a schematic diagram of a partially cutaway three-dimensional structure of the present invention;

[0027] Figure 9 For the present invention Figure 8 Schematic diagram of the local enlarged structure at D in the middle;

[0028] Figure 10 For the present invention Figure 8 Schematic diagram of the local enlarged structure at E in the middle;

[0029] Figure 11 It is a schematic diagram of the three-dimensional structure of the external frame, the outrigger and the shift block of the present invention;

[0030] Figure 12 For the present invention Figure 11 Schematic diagram of the local enlarged structure at F in the middle;

[0031] Figure 13 It is a schematic diagram of the exploded three-dimensional structure of the outrigger, the shift block and the shift frame of the present invention;

[0032] Figure 14 It is a bottom-view schematic diagram of the three-dimensional structure of the driving shaft gear, the limiting screw and the auxiliary rotation cap of the present invention;

[0033] Figure 15 It is a bottom-up schematic diagram of the three-dimensional structure of the present invention as a whole;

[0034] Figure 16 For the present invention Figure 15 Schematic diagram of the local enlarged structure at G in the middle;

[0035] Figure 17 It is a schematic diagram of the exploded three-dimensional structure of the threaded cylinder, rotating ring and fixed guide cylinder of the present invention.

[0036] In the figure: 1. Self-adjusting center column; 2. Threaded column; 3. Counterweight ball; 4. Lifting platform; 5. Threaded cylinder; 6. Limit spring; 7. Limit frame; 8. Hinge interface; 9. Rotating frame; 10. Laser rangefinder; 11. Adjusting sleeve; 12. Synchronous pull frame; 13. Transmission plate; 14. Outer end plate; 15. Rotating ring; 16. Fixed guide cylinder; 17. Adjustment groove; 18. Limit opening; 19. Through opening; 20. Outer ring frame; 21. Rotating frame; 22. Pressing bolt; 23. Limiting ring; 24. Rotating support leg; 25. External frame; 26. Shaft cylinder; 27. Synchronous gear 1. The gears of the gears are arranged in a circle, and the gears are rotated in a circle. 2. The gears of the gears are arranged in a circle, and the gears are rotated in a circle. 3. The gears of the gears are arranged in a circle, and the gears are rotated in a circle. 4. The gears of the gears are arranged in a circle, and the gears are rotated in a circle. 5. The gears of the gears are arranged in a circle, and the gears are rotated in a circle. 6. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 7. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 8. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 9. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 10. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 11. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 12. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 13. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 14. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 15. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 16. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 17. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 18. The gears of the gears are rotated in a circle, and the gears are rotated in a circle. 19 DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] For examples, see Figures 1-17 , A terrain flatness measuring device for urban planning includes a frame and a measurement and comparison component. An autonomous adjusting middle column 1 is installed in the frame, and an auxiliary adjustment ball rod 52 is fixedly connected to the autonomous adjusting middle column 1. The bottom end of the autonomous adjusting middle column 1 is fixedly connected to a threaded column 2, and the bottom end of the threaded column 2 is fixedly connected to a counterweight ball 3. The measurement and comparison component includes a lifting platform 4, a threaded cylinder 5 is fixedly connected to the lifting platform 4, the threaded cylinder 5 is threadedly connected to the threaded column 2, and the threaded cylinder 5 is connected to the limiting frame 7 through a limit spring 6, the limiting frame 7 is fixedly connected to an outer end plate 14, the limit spring 6 is fixedly connected to the outer end plate 14, and the limit spring 6 is fixedly connected to a rotating ring 15, the rotating ring 15 is rotatably connected to a fixed guide cylinder 16, and a transfer groove 17 matching the limit frame 7 is provided in the fixed guide cylinder 16, and a limit opening 18 and a through opening 19 are provided in the transfer groove 17. The limit opening 18 is used for inserting and limiting the limit frame 7. The through-hole 19 is used for the passage of the limit frame 7. A friction limit surface is provided at one end of the limit frame 7 near the threaded column 2. When the friction limit surface and the threaded column 2 form mutual contact and tightness, the rotation limit of the threaded column 2 will be realized. The fixed guide cylinder 16 is fixedly connected to the threaded cylinder 5. The limit frame 7 is matched with the self-adjusting middle column 1. Three hinge interfaces 8 are provided on the lifting platform 4. The three hinge interfaces 8 are rotatably connected with the rotating frame 9. The three rotating frames 9 are all equipped with laser rangefinders 10. The threaded cylinder 5 is externally threaded with an adjusting sleeve 11. The adjusting sleeve 11 is externally rotatably connected with a synchronous pull frame 12. The synchronous pull frame 12 is hinged with three transmission plates 13. The three transmission plates 13 are respectively hinged with the three rotating frames 9. Through the design of the measurement and comparison components, the terrain flatness of the supporting urban planning land is formed to form corresponding data measurement and collection functional components. The measurement mode is richer, the measurement range can be adjusted, and the measurement efficiency is high.

[0039] It should be further explained that the frame includes an outer ring frame 20, to which a hand-held ring 51 is fixedly connected, and a rotating frame 21 is rotatably connected inside the outer ring frame 20, and the self-adjusting middle column 1 is rotatably connected inside the rotating frame 21, and the outer ring frame 20 and the rotating frame 21 are both threadedly connected with a clamping bolt 22, and a limiting ring 23 is provided on the self-adjusting middle column 1 and the rotating frame 21, and the two limiting rings 23 are respectively matched with the two clamping bolts 22, and a swivel structure is installed outside the outer ring frame 20, and the swivel structure includes three swivel legs 24 and three external frames 25, and the three swivel legs 24 are all fixedly connected with a shaft cylinder 26, and the three external frames 25 are all fixedly connected to the outer ring frame 20, and the three shaft cylinders 26 are respectively rotatably connected to the three external frames 25, and the three external frames 25 are all slidably connected. A synchronous rack 27 is dynamically connected, and the three synchronous racks 27 are all meshed with a synchronous gear 28. The three synchronous gears 28 are respectively fixedly connected to the three rotating legs 24. The bottom ends of the three synchronous racks 27 are fixedly connected to a synchronous ring 29. A threaded rod 30 is installed on an external frame 25 on the right side. A synchronous rack 27 on the right side is rotatably connected to the threaded rod 30. An external frame 25 on the right side is fixedly connected to an outrigger 31. Two shift blocks 32 are slidably connected in the outrigger 31. A first screw groove and a second screw groove are respectively provided in the two shift blocks 32. The first screw groove and the second screw groove are matched with the threaded rod 30. An adjustment limit assembly is installed in the outrigger 31. The adjustment limit assembly is used to adjust the relative contact limit and the relative distance adjustment limit of the two shift blocks 32. The adjustment limit assembly includes a shift frame 33, which is rotatably connected to the outrigger 31. The two shift blocks 32 are fixedly connected to a transmission rod 34. Two strip openings 35 are provided on the shift frame 33. The two transmission rods 34 are respectively inserted into the two strip openings 35. The shift frame 33 is connected to a positioning spring 36, and the positioning spring 36 is connected to the outrigger 31. The bottom ends of the three rotating legs 24 are fixedly connected to a bottom support 37. The three bottom supports 37 are rotatably connected to a rotating bracket 38. The three rotating brackets 38 are fixedly connected to a ball wheel sleeve 39. Spherical wheels 40 are installed in the three ball wheel sleeves 39. The three bottom supports 37 are installed with storage springs 41. The three storage springs 41 are respectively connected to the three rotating brackets 38. The three rotating brackets 38 are fixedly connected to the outrigger 42. The three outriggers 42 are all fixedly connected with traction ropes 43. The three traction ropes 43 pass through the three rotating legs 24 respectively. The three shaft cylinders 26 are all provided with lead-out holes matching the traction ropes 43. A storage rotating frame 44 is installed in the outer ring frame 20. The three traction ropes 43 are all installed on the storage rotating frame 44. Through the design of the frame, a matching bracket installation structure is formed for the measurement and comparison component. A corresponding bracket installation structure can be formed for the measurement and comparison component, which is convenient for the fixed-point support and mobile travel of the measurement and comparison component. It can form a fixed-point measurement of the terrain flatness, and can also form a mobile travel measurement. It is more practical and more convenient to operate. Three rope inlets 50 are opened on the outer ring frame 20, and the three rope inlets 50 are matched with the three traction ropes 43 respectively.It is convenient for the traction rope 43 to be wound around and loosened relative to the outer ring frame 20.

[0040] The outer ring frame 20 is provided with an adjusting mechanism that matches the storage rotating frame 44. The adjusting mechanism includes a drive shaft gear 45 and a transmission gear ring 46. The transmission gear ring 46 is fixedly connected to the storage rotating frame 44. The drive shaft gear 45 is rotatably connected to the outer ring frame 20. The drive shaft gear 45 is meshed with the transmission gear ring 46. The rotation of the transmission gear ring 46 can be achieved by rotating the drive shaft gear 45. The rotation of the transmission gear ring 46 will drive the storage rotating frame 44 to rotate. The rotation of the storage rotating frame 44 can form a control for the storage or deployment of the traction rope 43. A threaded hole 47 is provided on the drive shaft gear 45. The threaded hole 47 is connected to the limiting screw 48 by threading. By rotating the limiting screw 48 so that the limiting screw 48 is pressed against the outer ring frame 20, the rotation control of the drive shaft gear 45 relative to the outer ring frame 20 can be achieved to form a limit for the retraction and deployment of the traction rope 43. The sleeve 11, the limit screw 48 and the two clamping bolts 22 are all fixedly connected with an auxiliary rotating cap ring 49. By rotating the auxiliary rotating cap ring 49, the corresponding adjusting sleeve 11, the limit screw 48 and the two clamping bolts 22 can be driven to rotate. The auxiliary rotating cap ring 49 is provided with a column structure for the operator to directly grasp with his hand. It also has a circular groove structure formed to facilitate the increase of the driving force arm. When a larger rotational force is required, an external rod-shaped object is inserted into the corresponding circular groove structure, and the corresponding auxiliary rotating cap ring 49 is pried by the rod-shaped object to rotate. The moving frame 33, the outrigger frame 31, the three bottom supports 37 and the three rotating brackets 38 are all rotatably connected with a rotating connecting block 53. The eight rotating connecting blocks 53 are respectively fixedly connected to the two ends of the positioning spring 36 and the two ends of the three storage springs 41, ensuring that the positioning spring 36 and the storage spring 41 are connected while providing sufficient adjustment freedom for the positioning spring 36 and the storage spring 41.

[0041] The laser rangefinder 10 in this embodiment is a conventional device purchased on the market and known to those skilled in the art. In the present invention, we only use it and do not improve its structure and function. For those skilled in the art, its setting method, installation method and electrical connection method can be debugged and operated according to the requirements of its instruction manual, and will not be described in detail here.

[0042] To sum up, the working principle of the terrain flatness measuring device for urban planning is as follows: when in use, the terrain flatness measuring device for urban planning is first carried to the place where it is required to be used. In the carrying state, in order to reduce the space occupied by the terrain flatness measuring device for urban planning, the three bottom supports 37 are moved relatively close to each other by rotating the three rotating legs 24. When in use, the three bottom supports 37 are adjusted to move away from each other by rotating the three rotating legs 24. Since the synchronous rack 27 and the synchronous gear 28 have a meshing transmission effect, when the rotating legs 24 rotate and drive the synchronous gear 28 to rotate, a sliding movement of the synchronous rack 27 relative to the external frame 25 will be formed. Since the bottom ends of the three synchronous racks 27 are fixedly connected to the synchronous ring 29, the movement of one of the three synchronous racks 27 will drive the three synchronous racks 27 to form a synchronous movement, as shown in the attached figure. Figure 2In the state shown, the two shift blocks 32 are controlled to move closer to each other so that the opposite ends of the two shift blocks 32 contact and fit together. At this time, the first screw groove and the second screw groove act together on the threaded rod 30, so that the two shift blocks 32 form a threaded effect with the threaded rod 30. At this time, the rotation of the threaded rod 30 will realize the relative height change of the threaded rod 30 relative to the outrigger 31, forming a height adjustment of the synchronous rack 27 on the right side, and then realizing the synchronous height adjustment of the three synchronous racks 27, and finally realizing the synchronous relative rotation adjustment of the three rotating legs 24. One of the two shift blocks 32 is set on The shifting frame 33 is rotated by the movable frame 33 and the movable frame 33 is rotated by the movable frame 33. The movable frame 33 is rotated by the movable frame 33 and the movable frame 33 is rotated by the movable frame 33. The movable frame 33 is rotated by the movable frame 33 and the movable frame 33 is rotated by the movable frame 33. The movable frame 33 is rotated by the movable frame 33 and the movable frame 33 is rotated by the movable frame 33. The movable frame 33 is rotated by the movable frame 33 and the movable frame 33 is rotated by the movable frame 33. The movable frame 33 is rotated by the movable frame 33 and the movable frame 33 is rotated by the movable frame 33. The movable frame 33 is rotated by the movable frame 33 and the movable frame 33 is rotated by the movable frame 33. The two limiting states of the limit spring 6 are used to limit the relatively close contact state and the relatively separated state of the two shift blocks 32. The two limiting states of the limit spring 6 take the shortest compression state in the rotation and swinging process of the limit spring 6 as the critical point. The limit spring 6 is in one limiting state when it has not passed the shortest compression state during the swing adjustment process. When the limit spring 6 rotates through the shortest compression state, it enters another limiting state. After the two shift blocks 32 are relatively far apart, since the first screw groove and the second screw groove are separated relative to the threaded rod 30, the threaded cooperation between the two shift blocks 32 and the threaded rod 30 is fully The cam 27 is rotated to move the support legs 24 so that the support legs 24 are in a stable position relative to each other, and the cam 27 is rotated to move the support legs 24 so that the support legs 24 are in a stable position relative to each other, and the support legs 24 are in a stable position relative to each other, and the support legs 24 are in a stable position relative to each other, and the support legs 24 are in a stable position relative to each other, and the support legs 24 are in a stable position relative to each other, and the support legs 24 are in a stable position relative to each other, and the support legs 24 are in a stable position relative to each other, and the support legs 24 are in a stable position relative to each other, and the support legs

[0043] Furthermore, by adjusting the three swivel legs 24 so that they can form a stable support for the outer ring frame 20, the three swivel legs 24 have a fixed support form and a movable support form in the support state. In the fixed support form, the spherical wheel 40 is separated from the ground, and the bottom support 37 is in contact with the ground. At this time, the support fixation of the three swivel legs 24 is better. At the same time, by rotating and adjusting the storage swivel frame 44, the synchronous rotation and storage of the three traction ropes 43 are achieved, so that the three traction ropes 43 act on the three outriggers 42 respectively, and the three outriggers 42 respectively pull the three swivel brackets 38 to rotate, so that the three spherical wheels 40 are respectively rotated and lowered relative to the three bottom supports 37. Finally, the three spherical wheels 40 respectively enter a relatively low posture relative to the three bottom supports 37. Thereafter, The three spherical wheels 40 are in contact with the ground surface to form the support of the three rotating legs 24. In this state, the movement of the terrain flatness measuring device for urban planning can be achieved by applying a pushing force to push the handheld ring 51, and the relative positions of the three laser rangefinders 10 are also fixed when the terrain flatness measuring device for urban planning is fixed. The relative positions of the three laser rangefinders 10 also move when the terrain flatness measuring device for urban planning is moved. In the fixed state, the two clamping bolts 22 will be adjusted first to invalidate the rotation limit effect between the outer ring frame 20 and the rotating frame 21, and also invalidate the rotation limit effect between the rotating frame 21 and the self-adjusting middle column 1. Under the action of the counterweight ball 3, the threaded column 2 will actively enter the upright posture. When the threaded column 2 stops swinging, By adjusting the two clamping bolts 22 in reverse, the limit between the rotating frame 21 and the self-adjusting middle column 1 and the limit between the outer ring frame 20 and the rotating frame 21 are achieved. Then, the limit frame 7 is adjusted into the limit opening 18. At this time, the limit frame 7 does not form a relative limit effect with the threaded column 2. The threaded barrel 5 is adjusted upward to the limit height relative to the threaded column 2 and the relative height is maintained. The three laser rangefinders 10 are started and debugged. When the three laser rangefinders 10 all have detection data, the interference force acting on the threaded barrel 5 is released. Thereafter, under the action of the lifting platform 4's own gravity, the threaded barrel 5 will fall relative to the threaded column 2. Due to the threaded connection between the threaded barrel 5 and the threaded column 2, the lifting platform 4 will rotate during the falling process, and the final performance is The three laser rangefinders 10 fall in a synchronous spiral trajectory. During the spiral trajectory, three data measurements are formed at multiple time points. After the measurement is completed, the deviation values of the three sets of data at the same time point are compared to form a terrain flatness judgment. That is, when the difference between the three data at the same time point is smaller, the terrain flatness is better, and vice versa, the terrain flatness is worse. Since the three laser rangefinders 10 will form a coverage data measurement from far to near around the bracket installed for the urban planning terrain flatness measurement device during the spiral fall, the single measurement coverage effect is good and the measurement efficiency is high. In addition, the three transmission plates 13 can be synchronously adjusted by rotating the adjustment sleeve 11 relative to the threaded cylinder 5.The three transmission plates 13 drive the three rotating frames 9 to rotate relative to the lifting platform 4, and finally adjust the angle between the laser rangefinder 10 and the ground to enrich the surveying range of the three laser rangefinders 10.

[0044] Furthermore, when applying a driving force to push the hand-held ring 51 to form the movement of the terrain flatness measuring device for urban planning, it is necessary to pull the limit frame 7 out of the limit opening 18 and make the limit frame 7 enter the adjustment groove 17, keep the limit frame 7 in the adjustment groove 17 and form an auxiliary rotation until the limit frame 7 corresponds to the through opening 19, and then adjust the relative height of the threaded cylinder 5 relative to the threaded rod 30. After the adjustment is completed, release the pull of the limit frame 7, and under the elastic action of the limit spring 6, the limit frame 7 passes through the through opening 19 and acts on the threaded column 2, so that the lifting platform 4 has a relatively stable height limit relative to the threaded column 2. After that, turn on the three laser rangefinders 10, and push the terrain flatness measuring device for urban planning to realize the terrain flatness measuring device for urban planning. The terrain flatness measuring device moves on the surface, and the three laser rangefinders 10 collect data from different surface positions in a moving state. Similarly, three data measurements at multiple time points are selected for comparison. When the difference between the three data at the same time point is smaller, the terrain flatness is better, and vice versa, the terrain flatness is worse. During the detection process, the threaded column 2 is provided with the function of autonomous upright adjustment by rotating the adjustment clamping bolt 22 to ensure that the three laser rangefinders 10 will not form horizontal deviations due to the different support heights of the three rotating legs 24 on the surface. At this time, the terrain flatness measuring device for urban planning should be pushed as smoothly and uniformly as possible during the pushing process to reduce the swing of the threaded rod 30 due to inertia.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A terrain flatness measuring device for urban planning, comprising a frame, characterized in that: It also includes a measurement and comparison component, an autonomous adjustment center column is installed in the frame, the bottom end of the autonomous adjustment center column is fixedly connected to a threaded column, the bottom end of the threaded column is fixedly connected to a counterweight ball, the measurement and comparison component includes a lifting platform, a threaded barrel is fixedly connected in the lifting platform, the threaded barrel is threadedly connected to the threaded column, and the threaded barrel is connected to the limit frame through a limit spring, the limit frame is matched with the autonomous adjustment center column, three hinge interfaces are provided on the lifting platform, the three hinge interfaces are rotatably connected to the rotating frame, the three rotating frames are all installed with laser rangefinders, the threaded barrel is externally threaded with an adjusting sleeve, the adjusting sleeve The outer rotation is connected with a synchronous pulling frame, the synchronous pulling frame is hinged with three transmission plates, the three transmission plates are respectively hinged with the three rotating frames, the limit frame is fixedly connected with an outer end plate, the limit spring is fixedly connected to the outer end plate, and the limit spring is fixedly connected to a rotating ring, the rotating ring is rotatably connected to a fixed guide cylinder, a transfer groove matching the limit frame is provided in the fixed guide cylinder, a limit opening and a through opening are provided in the transfer groove, the limit opening is used for the insertion and limiting of the limit frame, and the through opening is used for the passage of the limit frame, a friction limit surface is provided on one end of the limit frame close to the threaded column, and the fixed guide cylinder is fixedly connected to the threaded cylinder; The frame includes an outer ring frame, a rotating frame is rotatably connected inside the outer ring frame, the self-adjusting middle column is rotatably connected in the rotating frame, and the outer ring frame and the rotating frame are both threadedly connected with a tightening bolt, and a limit ring is provided on the self-adjusting middle column and the rotating frame, and the two limit rings are matched with the two tightening bolts respectively. A swivel support structure is installed outside the outer ring frame, and the swivel support structure includes three swivel legs and three external frames, and the three swivel legs are fixedly connected with a shaft cylinder, and the three external frames are fixedly connected to the outer ring frame, and the three shaft cylinders are rotatably connected in the three external frames respectively, and the three external frames are slidably connected with synchronous racks, and the three synchronous racks are meshed There is a synchronous gear, and the three synchronous gears are fixedly connected to the three rotating legs respectively. The bottom ends of the three synchronous racks are fixedly connected to the synchronous ring. A threaded rod is installed on an external frame on the right side, and a synchronous rack on the right side is rotatably connected to the threaded rod. An external frame on the right side is fixedly connected to an outrigger, and two shift blocks are slidably connected in the outrigger. A first screw groove and a second screw groove are respectively provided in the two shift blocks, and the first screw groove and the second screw groove are matched with the threaded rod. An adjustment limit assembly is installed in the outrigger, and the adjustment limit assembly is used for relative contact adjustment limit and relative distance adjustment limit of the two shift blocks.

2. The terrain flatness measuring device for urban planning according to claim 1, characterized in that: The adjustment limit assembly includes a shift frame, which is rotatably connected to the outrigger frame. The two shift blocks are fixedly connected to a transmission rod. Two strip openings are provided on the shift frame, and the two transmission rods are respectively inserted into the two strip openings. The shift frame is connected to a positioning spring, and the positioning spring is connected to the outrigger frame.

3. The terrain flatness measuring device for urban planning according to claim 2, characterized in that: The bottom ends of the three swivel legs are fixedly connected to the bottom supports, and the three bottom supports are rotatably connected to the swivel brackets, and the three swivel brackets are fixedly connected to the ball wheel sleeves, and the three ball wheel sleeves are installed with spherical wheels. The three bottom supports are installed with storage springs, and the three storage springs are respectively connected to the three swivel brackets, and the three swivel brackets are fixedly connected to the outriggers, and the three outriggers are fixedly connected to the traction ropes, and the three traction ropes pass through the three swivel legs respectively. The three shaft cylinders are provided with lead-out holes matching the traction ropes, and a storage swivel bracket is installed in the outer ring frame, and the three traction ropes are installed on the storage swivel bracket, and an adjustment mechanism matching the storage swivel bracket is installed in the outer ring frame.

4. The terrain flatness measuring device for urban planning according to claim 3, characterized in that: The adjustment mechanism includes a drive shaft gear and a transmission gear ring, the transmission gear ring is fixedly connected to the storage rotary frame, the drive shaft gear is rotatably connected to the outer ring frame, the drive shaft gear is meshed with the transmission gear ring, a threaded hole is opened on the drive shaft gear, and a limiting screw is threadedly connected in the threaded hole.

5. The terrain flatness measuring device for urban planning according to claim 4, characterized in that: The adjusting sleeve, the limiting screw and the two clamping bolts are all fixedly connected with an auxiliary rotating cap ring. Three rope inlets are opened on the outer ring frame, and the three rope inlets are matched with the three traction ropes respectively. A hand-held ring is fixedly connected to the outer ring frame, and an auxiliary adjustment club is fixedly connected to the self-adjusting middle column.

6. The terrain flatness measuring device for urban planning according to claim 5, characterized in that: The shifting frame, the outrigger, the three bottom supports and the three rotating brackets are all rotatably connected with rotating connecting blocks, and the eight rotating connecting blocks are respectively fixedly connected to the two ends of the positioning spring and the two ends of the three storage springs.

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