Terrain flatness measuring device for urban planning

Abstract

The invention relates to the technical field of flatness measurement, and provides a terrain flatness measuring device for urban planning, which can form fixed-point large-range measurement on the terrain flatness and also can form mobile advancing measurement, and is richer in measurement mode, better in practicability, more convenient to operate and higher in measurement efficiency. Comprising a rack and a measurement and comparison assembly, an automatic adjusting middle column is installed in the rack, the bottom end of the automatic adjusting middle column is fixedly connected with a threaded column, the bottom end of the threaded column is fixedly connected with a balance weight ball, the measurement and comparison assembly comprises a lifting table, and a threaded cylinder is fixedly connected in the lifting table and is in threaded connection with the threaded column; the lifting platform is provided with three hinge ports, rotating frames are rotationally connected into the three hinge ports, laser range finders are installed on the three rotating frames, an adjusting sleeve is connected to the outer portion of the threaded cylinder in a threaded mode, and a synchronous pulling frame is rotationally connected to the outer portion of the adjusting sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of flatness measurement, and in particular to a terrain flatness measurement 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 of buildings, roads or green spaces. In order to facilitate the processing during terrain leveling and the verification after terrain leveling, we propose a terrain flatness measuring 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, indicating components are installed on the top of the fixed guide rails, and fixed tubes located below the fixed guide rails are inlaid and installed 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 realize the movement of the colored liquid, and the flatness of the ground is directly obtained by the colored liquid input into the first temporary storage tank and the second temporary storage tank in combination with the scale on the outer side. 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 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, the staff pushes the device to measure the flatness of the terrain, the measuring roller marks the area with unqualified flatness, and transmits the unqualified data to the staff at the same time.

[0004] Although the above two sets of existing technical solutions can both realize the measurement of terrain flatness, they need to drive past the measurement position to realize the measurement during the measurement operation, and are affected by the wheel-supported driving. Once the flatness of multiple support points formed by the cooperation of multiple wheels is poor, it is very easy to cause the frame or workbench to tilt 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 view of the shortcomings of the prior art, 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 more diverse 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 measuring and comparing component, wherein an autonomously adjustable middle column is installed in the frame, and 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 measuring and comparing 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 limiting frame is connected to the threaded barrel through a limiting spring, and the limiting frame matches the autonomously adjustable middle column, and three hinge interfaces are provided on the lifting platform, and rotating frames are 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 pull frame is rotatably connected to the outside of 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, the fixed guide cylinder is provided with an adjustment groove matching the limit frame, the adjustment groove is provided with a limit opening and a through opening, 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, the limit frame is provided with a friction limit surface at one end 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 inside the outer ring frame, the self-adjusting middle column is rotatably connected inside the rotating frame, and both the outer ring frame and the rotating frame are threadedly connected with clamping bolts, and limiting rings are provided on the self-adjusting middle column and the rotating frame, 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 with a shaft cylinder, the three external frames are fixedly connected with the outer ring frame, the three shaft cylinders are rotatably connected in the three external frames respectively, the three external frames are slidably connected with synchronization racks, the three synchronization racks are meshed 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 with 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, and the two opposing shift blocks are respectively provided with a first screw groove and a second screw groove, and both the first screw groove and the second screw groove match the threaded rod, and 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 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.

[0012] Preferably, the bottom ends of the three swivel legs are fixedly connected to a bottom support, the three bottom supports are rotatably connected to swivel brackets, the three swivel brackets are fixedly connected to 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 outrigger rods, the three outrigger rods are fixedly connected to 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, a storage swivel rack is installed in the outer ring frame, the three traction ropes are installed on the storage swivel rack, and an adjustment mechanism matching the storage swivel rack is installed in the outer ring frame.

[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 rotating 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.

[0014] Preferably, the adjusting sleeve, the limit screw and the two clamping bolts are all fixedly connected with an auxiliary rotating cap ring, the outer ring frame is provided with three rope inlets, the three rope inlets are respectively matched with the three traction ropes, the outer ring frame is fixedly connected with a hand-held ring, and the autonomously adjustable center column is fixedly connected with an auxiliary adjustment club.

[0015] Preferably, the shifting frame, the outrigger frame, the three bottom supports and the three rotating supports 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 measuring device for urban planning, which has the following beneficial effects: (1) In the present invention, through the design of the measurement comparison component, the terrain flatness of the supporting urban planning land forms a corresponding data measurement and collection functional component, the measurement mode is richer, the measurement range can be adjusted, and the measurement efficiency is higher.

[0017] (2) In the present invention, a matching bracket installation structure is formed for the measurement comparison component through the design of the frame, which can form a corresponding bracket installation structure for the measurement comparison component, facilitate the fixed-point support and mobile travel of the measurement comparison component, and can form a fixed-point measurement of the terrain flatness, and can also form a mobile travel measurement, which is more practical and more convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle; Figure 3 For the present invention Figure 1 A schematic diagram of the local enlarged structure at B in the middle; Figure 4 For the present invention Figure 1 A schematic diagram of the local enlarged structure at C in the middle; Figure 5 It is a schematic diagram of the exploded three-dimensional structure of the lifting platform and the threaded cylinder of the present invention; Figure 6 It is a schematic diagram of the exploded three-dimensional structure of the threaded cylinder, the adjusting sleeve and the synchronous puller of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the self-adjusting middle column, outer ring frame and rotating frame of the present invention; Figure 8 It is a schematic diagram of a partially cutaway three-dimensional structure of the present invention; Fig. 9 For the present invention Figure 8 A schematic diagram of the local enlarged structure at D in the middle; Fig.10 For the present invention Figure 8 A schematic diagram of the local enlarged structure at E in the middle; Fig.11 It is a schematic diagram of the three-dimensional structure of the external frame, the outrigger and the shifting block of the present invention; Fig.12 For the present invention Fig.11 A schematic diagram of the local enlarged structure at F in the middle; Fig.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; Fig.14It is a bottom-up three-dimensional structural schematic diagram of the driving shaft gear, the limiting screw and the auxiliary rotation cap of the present invention; Fig.15 It is a bottom-up three-dimensional structural schematic diagram of the present invention as a whole; Fig.16 For the present invention Fig.15 A schematic diagram of the local enlarged structure at G in the middle; Fig.17 It is a schematic diagram of the exploded three-dimensional structure of the threaded cylinder, the rotating ring and the fixed guide cylinder of the present invention.

[0019] 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. Limit ring; 24. Rotating support leg; 25. External frame; 26. Shaft cylinder; 27. Synchronous gear strip; 28, synchronous gear; 29, synchronous ring; 30, threaded rod; 31, outrigger; 32, shift block; 33, shift frame; 34, transmission rod; 35, strip mouth; 36, positioning spring; 37, bottom support; 38, rotating bracket; 39, ball wheel sleeve; 40, spherical wheel; 41, storage spring; 42, outrigger; 43, traction rope; 44, storage rotating frame; 45, drive shaft gear; 46, transmission gear ring; 47, threaded hole; 48, limit screw; 49, auxiliary rotation cap ring; 50, rope inlet; 51, hand-held ring; 52, auxiliary adjustment ball rod; 53, rotating connecting block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0021] For examples, see Figure 1-Figure 17A terrain flatness measuring device for urban planning includes a frame and a measurement comparison component. An autonomously adjustable middle column 1 is installed in the frame. An auxiliary adjustment ball rod 52 is fixedly connected to the autonomously adjustable middle column 1. A threaded column 2 is fixedly connected to the bottom end of the autonomously adjustable middle column 1. A counterweight ball 3 is fixedly connected to the bottom end of the threaded column 2. The measurement 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 a limit frame 7 through a limit spring 6. The limit 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. A transfer groove 17 matching the limit frame 7 is provided in the fixed guide cylinder 16. 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-opening 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 close to 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 matches 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 a rotating frame 9. Laser rangefinders 10 are installed on the three rotating frames 9. 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 higher.

[0022] It should be further explained that the frame includes an outer ring frame 20, to which a hand-held ring 51 is fixedly connected, a rotating frame 21 is rotatably connected inside the outer ring frame 20, an autonomously adjustable 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 clamping bolts 22, and limit rings 23 are provided on the autonomously adjustable middle column 1 and the rotating frame 21, and the two limit 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 shaft cylinders 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 inside the three external frames 25, and the three external frames 25 are all slidably connected inside. 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 fixedly connected to the three rotating legs 24 respectively. The bottom ends of the three synchronous racks 27 are fixedly connected with 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 outrigger 31 is fixedly connected to an external frame 25 on the right side. Two shift blocks 32 are slidably connected in the outrigger 31. The two shift blocks 32 are respectively provided with a first screw groove and a second screw groove. 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 for the relative contact adjustment 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, which 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. The three ball wheel sleeves 39 are installed with a spherical wheel 40. The three bottom supports 37 are installed with a storage spring 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 comparison component, and a corresponding bracket installation structure can be formed for the measurement comparison component, which is convenient for the fixed-point support and mobile travel of the measurement comparison component, and can form a fixed-point measurement of the terrain flatness, and can also form a mobile travel measurement, which is more practical and more convenient to operate, and 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 to guide the winding and loosening of the traction rope 43 relative to the outer ring frame 20.

[0023] It should be further explained that an adjustment mechanism matching the storage rotating frame 44 is installed in the outer ring frame 20, and the adjustment 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, and 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 drive of the transmission gear ring 46 can be realized 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 the control of 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 threadedly connected to a limiting screw 48. By rotating the limiting screw 48 to make the limiting screw 48 form abutment against the outer ring frame 20, the rotation control of the drive shaft gear 45 relative to the outer ring frame 20 can be realized to form the limit 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. The corresponding adjusting sleeve 11, the limit screw 48 and the two clamping bolts 22 can be driven by rotating the auxiliary rotating cap ring 49. The auxiliary rotating cap ring 49 is provided with a column structure for the operator to directly grasp with his hands. 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.

[0024] 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 without improving 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.

[0025] In summary, 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 location 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 relatively moved closer by rotating and adjusting 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 approach each other so that the opposite ends of the two shift blocks 32 are in contact with each other. At this time, the first screw groove and the second screw groove act on the threaded rod 30 together, 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 a 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 provided with There is a toggle key block, and the toggle key block extends out of the outrigger 31. By toggling and adjusting the toggle key block, the auxiliary push of the corresponding shift block 32 can be achieved. The movable shift block 32 moves through the transmission rod 34 fixedly connected thereto to realize the rotation drive of the shift frame 33. During the rotation of the rotating shift frame 33, on the one hand, another transmission rod 34 will drive the other shift frame 33 to slide, and finally the two shift frames 33 will be synchronously relatively far away from each other. On the other hand, the rotation of the shift frame 33 will also drive the positioning spring 36 to swing, so that the positioning spring 36 will run from one positioning state to another positioning state. The limiting spring 6 is in one limiting state when it has not passed the shortest compression state during the swinging adjustment process, and enters another limiting state when the limiting spring 6 rotates through the shortest compression state. After the two shift blocks 32 are relatively far apart, since the first screw groove and the second screw groove are separated from the threaded rod 30, the threaded cooperation between the two shift blocks 32 and the threaded rod 30 is The three pivot legs 24 disappear, and at this time, the three pivot legs 24 can be quickly adjusted by rotating and adjusting any one of the three pivot legs 24. After the synchronous relative rotation adjustment of the three pivot legs 24 is completed, the two shift blocks 32 need to be adjusted again to be close to each other and contact each other, so that the threaded cooperation between the two shift blocks 32 and the threaded rod 30 can take effect again, so that the synchronous rack 27 at the bottom end of the threaded rod 30 has a certain height limit, that is, the threaded rod 30 does not rotate at this time, and the synchronous rack 27 does not form relative sliding relative to the corresponding external frame 25, and the three pivot legs 24 have a relatively fixed bracket posture.

[0026] 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 realized, 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 are respectively in 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 driving force to push the hand-held ring 51. 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 are also moved when the terrain flatness measuring device for urban planning is moved. In the fixed state, the two clamping bolts 22 are 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 is no longer 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, and then the limit frame 7 is adjusted to enter 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 gravity of the lifting platform 4 itself, 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 falling process, three data measurements are formed at multiple time points. After the measurement is completed, the terrain flatness judgment can be formed by comparing the deviation values ​​of the three sets of data at the same time point, 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 of the urban planning terrain flatness measurement device during the spiral falling process, the single measurement coverage effect is better and the measurement efficiency is higher. In addition, the synchronous adjustment of the three transmission plates 13 can be achieved 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.

[0027] 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 tube 5 relative to the threaded rod 30. After the adjustment is completed, release the pull of the limit frame 7. 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, the three laser rangefinders 10 are turned on, and the terrain flatness measuring device for urban planning is pushed to achieve the city 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. During the detection process, the threaded column 2 is adjusted by rotating the clamping bolt 22 so that the threaded column 2 has the function of autonomous upright adjustment 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 evenly as possible during the pushing process to reduce the swing of the threaded rod 30 due to inertia.

[0028] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present 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: The machine frame also includes a measurement comparison component, wherein an autonomously adjustable middle column (1) is installed in the machine frame, a threaded column (2) is fixedly connected to the bottom end of the autonomously adjustable middle column (1), a counterweight ball (3) is fixedly connected to the bottom end of the threaded column (2), and the measurement 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 a limit frame (7) is connected to the threaded cylinder (5) via a limit spring (6), and the limit frame (7) is connected to the autonomously adjustable middle column (1). The middle column (1) is matched, and three hinged interfaces (8) are opened on the lifting platform (4). The three hinged interfaces (8) are rotatably connected to the rotating frames (9). The three rotating frames (9) are installed with laser rangefinders (10). The threaded cylinder (5) is externally threadedly connected to the adjusting sleeve (11). The adjusting sleeve (11) is externally rotatably connected to the synchronous pulling frame (12). The synchronous pulling frame (12) is hinged with three transmission plates (13). The three transmission plates (13) are respectively hinged to the three rotating frames (9).

2. A terrain flatness measuring device for urban planning according to claim 1, characterized in that: The limit 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 tube (16), a transfer groove (17) matching the limit frame (7) is arranged in the fixed guide tube (16), a limit opening (18) and a through opening (19) are arranged in the transfer groove (17), the limit opening (18) is used for inserting and limiting the limit frame (7), and the through opening (19) is used for passing the limit frame (7), a friction limit surface is arranged at one end of the limit frame (7) close to the threaded column (2), and the fixed guide tube (16) is fixedly connected to the threaded tube (5).

3. A terrain flatness measuring device for urban planning according to claim 2, characterized in that: The frame comprises an outer ring frame (20), a rotating frame (21) is rotatably connected inside the outer ring frame (20), 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 clamping bolts (22), and the self-adjusting middle column (1) and the rotating frame (21) are both provided with limit rings (23), two limit rings (23) are respectively matched with two clamping bolts (22), and a rotating support structure is installed outside the outer ring frame (20).

4. A terrain flatness measuring device for urban planning according to claim 3, characterized in that: The swivel structure comprises three swivel legs (24) and three external frames (25), the three swivel legs (24) are all fixedly connected to a shaft cylinder (26), the three external frames (25) are all fixedly connected to the outer ring frame (20), the three shaft cylinders (26) are respectively rotatably connected in the three external frames (25), the three external frames (25) are all slidably connected to a synchronous rack (27), 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 swivel 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 one of the external frames (25) on the right side, and one of the synchronous racks (27) on the right side is rotatably connected to the threaded rod (30).

5. A terrain flatness measuring device for urban planning according to claim 4, characterized in that: An outrigger (31) is fixedly connected to one of the external frames (25) on the right side, and two opposing shift blocks (32) are slidably connected inside the outrigger (31). A first screw groove and a second screw groove are respectively provided inside the two opposing shift blocks (32), and the first screw groove and the second screw groove both match the threaded rod (30). An adjustment limit assembly is installed inside the outrigger (31), and the adjustment limit assembly is used for relative contact adjustment limit and relative distance adjustment limit of the two opposing shift blocks (32).

6. A terrain flatness measuring device for urban planning according to claim 5, characterized in that: The adjustment and limiting assembly comprises a shift frame (33), the shift frame (33) is rotatably connected to the outrigger frame (31), the two shift blocks (32) are fixedly connected to a transmission rod (34), the shift frame (33) is provided with two strip openings (35), 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 frame (31).

7. A terrain flatness measuring device for urban planning according to claim 6, characterized in that: The bottom ends of the three rotating legs (24) are all fixedly connected to a bottom support (37), the three bottom supports (37) are all rotatably connected to a rotating bracket (38), the three rotating brackets (38) are all fixedly connected to a ball wheel sleeve (39), the three ball wheel sleeves (39) are all installed with a spherical wheel (40), the three bottom supports (37) are all installed with a storage spring (41), the three storage springs (41) are respectively connected to the three rotating brackets (38), and the three rotating brackets (38) are all fixedly connected There is an extension rod (42), the three extension rods (42) are all fixedly connected with a traction rope (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), and an adjustment mechanism matching the storage rotating frame (44) is installed in the outer ring frame (20).

8. A terrain flatness measuring device for urban planning according to claim 7, characterized in that: The adjustment mechanism comprises 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 rotationally connected to the outer ring frame (20); the drive shaft gear (45) is meshed with the transmission gear ring (46); a threaded hole (47) is formed on the drive shaft gear (45); and a limit screw (48) is internally threadedly connected to the threaded hole (47).

9. A terrain flatness measuring device for urban planning according to claim 8, characterized in that: The adjusting sleeve (11), the limiting screw (48) and the two clamping bolts (22) are all fixedly connected to an auxiliary rotating cap ring (49); three rope inlets (50) are opened on the outer ring frame (20); the three rope inlets (50) are matched with the three traction ropes (43) respectively; a hand-held ring (51) is fixedly connected to the outer ring frame (20); and an auxiliary adjustment club (52) is fixedly connected to the self-adjusting middle column (1).

10. The terrain flatness measuring device for urban planning according to claim 9, characterized in that: The shifting frame (33), the outrigger frame (31), the three bottom supports (37) and the three rotating supports (38) are all rotatably connected to a rotating connecting block (53), and the eight rotating connecting blocks (53) are respectively fixedly connected to two ends of the positioning spring (36) and two ends of the three storage springs (41).

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