Building level measuring device

Abstract

The present application discloses a building level measuring device, belonging to the technical field of measuring devices. The device comprises a movable box with an upward opening, a top cover mounted on the top surface of the movable box, movable wheels mounted at the corners of the bottom surface of the movable box, support plates hingedly connected to the circumference of the bottom of the movable box, a supporting base plate fixed to the support plates, a positioning through-hole formed on the top surface of the supporting base plate, a positioning rod inserted into the positioning through-hole, a movable plate mounted vertically slidingly installed in the movable box, a measuring instrument mounted on the top surface of the movable box, buffer grooves formed on the inner wall of the movable box, a buffer block mounted slidingly along the width direction of the movable box through the buffer groove, a sponge pad fixed to the side of the buffer block near the measuring instrument, and a control component for controlling the movement of the buffer block along the width direction of the movable box and a drive component for driving the movable plate to move vertically are disposed in the movable box. The present application has the effect of facilitating measurement using a measuring instrument.

Description

Technical Field

[0001] The present application relates to the technical field of measuring devices, and in particular to a building level measuring device. Background Art

[0002] Measuring devices are often needed in construction projects. Common measuring devices include levels, total stations, theodolites, plumb lines, rangefinders, etc. Levels are mainly used to measure height differences, and levels can be used with horizontal rangefinders to measure horizontal distances.

[0003] When using a level for measurement, the instrument is usually installed on a retractable tripod. First, open the tripod and adjust the height of the tripod to a moderate level. Then open the instrument box and fix the level to the tripod with connecting bolts.

[0004] Regarding the above-mentioned related technologies, the inventors believe that when using a level for measurement, the level needs to be installed on a tripod. When changing the observation point, in order to protect the level, the level needs to be placed back in the instrument box for transportation, which affects the measurement efficiency. Summary of the Invention

[0005] In order to improve the problem of cumbersome transportation of existing levels, the present application provides a building level measuring device.

[0006] The present application provides a building level measuring device that adopts the following technical solution:

[0007] The top surface of the movable frame is fixed with a lifting mechanism, and the lifting mechanism is installed in the movable frameed by the lifting mechanism, and the lifting mechanism is installed in the movable frame.

[0008] By adopting the above technical solution, when the measuring instrument is moved, the control component is used to move the buffer block toward the direction close to the measuring instrument, so that the sponge pad abuts against the measuring instrument, thereby providing a buffering effect on the measuring instrument and protecting the measuring instrument; when the measuring instrument is used, the support plate is rotated to make the support bottom plate contact the ground, and then the positioning rod is inserted into the soil after passing through the positioning through hole to fix the mobile box, and then the top cover is opened, and the driving component is used to move the mobile plate upward to facilitate the use of the measuring instrument for measurement.

[0009] Preferably, the control component includes a spring 1 fixed to the side of the buffer block, the end of the spring 1 away from the buffer block is fixedly connected to the inner wall of the buffer groove, a pull rope is fixed to the side of the buffer block away from the movable plate, and a tensioning component for pulling the pull rope is provided in the movable box.

[0010] By adopting the above technical solution, when the pull rope is loosened, the buffer block moves toward the direction close to the measuring instrument under the elastic force of spring 1, so that the sponge pad is in close contact with the measuring instrument; the pull rope can be used to drive the buffer block to move toward the direction away from the measuring instrument, so as to facilitate the upward movement of the measuring instrument.

[0011] Preferably, the top surface of the moving box is provided with an installation groove for inserting the top cover, the top surface of the installation groove is provided with a connecting groove, the tensioning assembly includes a connecting block, the connecting block is slidably connected to the moving box vertically through the connecting groove, the bottom surface of the connecting block is fixedly connected to the end of the pull rope away from the buffer block, the side surface of the connecting block is provided with a reset groove, the inner wall of the connecting groove is fixed with a reset block inserted into the reset groove, the top surface of the reset block is fixed with a spring 2, and the top end of the spring 2 is fixedly connected to the inner top surface of the reset groove.

[0012] By adopting the above technical solution, after the measuring instrument enters the mobile box, the top cover is inserted into the installation slot, the top cover pushes the connecting block to move downward, the pull rope is loosened, and the buffer block moves toward the direction close to the measuring instrument under the elastic force of spring one; when the top cover is removed, the connecting block moves upward under the elastic force of spring two, and the connecting block drives the buffer block to move away from the measuring instrument through the pull rope, so as to facilitate the upward movement of the measuring instrument.

[0013] Preferably, a clamping groove is provided on the inner wall of the installation groove, and the mobile box is slidably installed with a clamping block along its own width direction through the clamping groove, and a clamping groove for inserting the clamping block is provided on the side of the top cover.

[0014] By adopting the above technical solution, the top cover is inserted into the installation slot, and the clamping block is inserted into the clamping slot, thereby limiting the top cover and making it difficult for the top cover to fall out of the installation slot.

[0015] Preferably, a spring three is fixed on the side of the clamping block away from the top cover, and one end of the spring three away from the clamping block is fixedly connected to the inner wall of the clamping groove. The side of the clamping block close to the top cover is provided with a slope one, and the slope one is located on the top surface of the clamping block.

[0016] By adopting the above technical solution, when the top cover is moved downward, the top cover pushes the clamping block into the clamping groove through the inclined surface 1. When the top cover is fully inserted into the installation groove, the clamping block is inserted into the clamping groove under the elastic force of the spring 1.

[0017] Preferably, the top surface of the moving box is provided with a pressing groove connected to the clamping groove, and a pressing block is fixed to the top surface of the clamping block. The pressing block is slidingly connected to the moving box along the width direction of the moving box through the pressing groove.

[0018] By adopting the above technical solution, when the top cover needs to be removed, the pressing block is moved away from the top cover, and the pressing block drives the connecting block to move, so that the connecting block is separated from the slot, so that the top cover can be separated from the installation slot.

[0019] Preferably, the driving assembly includes a driving sleeve rotatably mounted on the bottom surface of the moving box and a driving screw fixed on the bottom surface of the moving plate, the driving screw and the driving sleeve are threadedly matched, a rotating shaft is rotatably mounted in the moving box, a motor is provided in the moving box, the output shaft of the motor is fixedly connected to the end of the rotating shaft, a gear 1 is fixed on the outer periphery of the rotating shaft, and a gear 2 that meshes with the gear 1 is fixed on the outer periphery of the driving sleeve; a guide rod is fixed on the bottom surface of the moving box, a guide sleeve is provided on the outer periphery of the guide rod, and the top surface of the guide sleeve is connected to the bottom surface of the moving plate.

[0020] By adopting the above technical solution, the guide rod and the guide sleeve provide a guiding effect on the movable plate, so that the movable plate always moves vertically; when the motor is started, the motor drives gear 1 to rotate through the rotating shaft, and gear 1 drives the driving sleeve to rotate through gear 2, thereby causing the driving screw to move vertically, and then driving the movable plate to move vertically.

[0021] The top of the movable frame is fixed with a spring, and the top of the movable frame is fixed with a spring, and the top of the movable frame is fixed with a contact block, and the inner wall of the movable frame is fixed with a contact block that can electrically contact the contact block; the top surface of the movable box is provided with a control groove, and the movable box is vertically slidably installed with a control block through the control groove, and a moving contact piece 1 is fixed on the bottom surface of the control block, and a fixed contact piece 1 that can electrically contact the moving contact piece 1 is fixed on the bottom surface of the control groove; the fixed contact piece 1 is electrically connected to the power supply, the moving contact piece 1 is electrically connected to the contact strip, and the contact block is electrically connected to the motor.

[0022] By adopting the above technical solution, the control block is moved downward, the movable contact piece 1 is electrically contacted with the fixed contact piece 1, and the contact block is electrically contacted with the contact strip, the motor is powered on, and the measuring instrument moves upward. After the measuring instrument moves to a certain height, the contact block and the contact strip are separated, the motor is powered off, and the measuring instrument stops moving, thereby limiting the highest position of the measuring instrument to ensure the stability of the measuring instrument; after the measuring instrument is used, the movable sleeve is moved downward, so that the contact block and the contact strip are electrically contacted, and the control block is pressed downward at the same time, so that the motor is powered on, the gear 1 rotates in the opposite direction, and the measuring instrument moves downward into the movable box.

[0023] Preferably, a limiting block is fixed on the side of the control block, a limiting groove is provided on the inner wall of the control groove, the limiting block is slidably connected to the movable box vertically through the limiting groove, a spring five is fixed on the bottom surface of the limiting block, and the bottom end of the spring five is fixedly connected to the inner bottom surface of the limiting groove.

[0024] By adopting the above technical solution, the control block is moved downward, and the spring five is in a compressed state. After the control block is released, the control block moves upward under the elastic force of the spring five, so that the movable contact piece 1 is separated from the fixed contact piece 1.

[0025] Preferably, a plurality of rotating grooves are provided on the bottom surface of the movable box, a rotating sleeve is rotatably installed in the rotating groove, a gear three is fixed on the outer circumference of the rotating sleeve, a gear ring is rotatably installed on the bottom of the movable box, the inner circumference of the gear ring is provided with an inner gear ring that meshes with the gear one, and the outer circumference of the gear ring is provided with an outer gear ring that meshes with the gear three; a rotating screw is inserted in the rotating sleeve, and the rotating screw is threadedly matched with the rotating sleeve, an insert is fixed on the inner wall of the rotating groove, a slot is provided on the outer circumference of the rotating screw, and the insert is vertically slidably connected to the rotating screw through the slot.

[0026] By adopting the above technical solution, gear one drives gear three to rotate through the gear ring, gear three drives the rotating sleeve to rotate, and the insert block is inserted in the slot to limit the rotating screw, so that the rotating screw moves vertically. When the measuring instrument moves upward, the rotating screw moves downward and contacts the ground to pre-position the mobile box; when the measuring instrument moves downward, the rotating screw moves upward and resets, so that the roller can drive the mobile box to move.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When moving the measuring instrument, use the control component to move the buffer block toward the measuring instrument so that the sponge pad contacts the measuring instrument, thereby providing a buffering effect and protecting the measuring instrument. When using the measuring instrument, rotate the support plate so that the support base plate contacts the ground. Then, insert the positioning rod through the positioning hole and insert it into the soil to fix the mobile box. Then, open the top cover and use the drive component to move the mobile plate upward to facilitate measurement using the measuring instrument.

[0029] 2. When the pull rope is loosened, the buffer block moves toward the measuring instrument under the elastic force of spring 1, so that the sponge pad is in close contact with the measuring instrument; the pull rope can be used to drive the buffer block to move away from the measuring instrument, so that the measuring instrument can move upward;

[0030] 3. The guide rod and guide sleeve provide guidance for the movable plate, so that the movable plate always moves vertically; start the motor, the motor drives gear 1 to rotate through the rotating shaft, and gear 1 drives the driving sleeve to rotate through gear 2, thereby causing the driving screw to move vertically, and then driving the movable plate to move vertically. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the building level measuring device of an embodiment of the present application.

[0032] Figure 2 It is a cross-sectional view of the movable box in the building level measuring device according to an embodiment of the present application.

[0033] Figure 3 It is a cross-sectional view of the guide sleeve in the building level measuring device according to an embodiment of the present application.

[0034] Figure 4 It is a structural diagram of the control block in the building level measurement device according to an embodiment of the present application.

[0035] Figure 5 It is a structural schematic diagram of the rotating sleeve and the rotating screw in the building level measuring device of an embodiment of the present application.

[0036] Figure 6 yes Figure 2 Enlarged schematic diagram of point A in the middle.

[0037] 1. Moving box; 11. Moving wheel; 12. Moving plate; 13. Measuring instrument; 2. Driving assembly; 21. Driving sleeve; 22. Driving screw; 23. Cavity; 24. Rotating shaft; 25. Motor; 26. Gear 1; 27. Gear 2; 28. Guide rod; 3. Guide sleeve; 31. Fixed sleeve; 32. Moving sleeve; 33. Synchronous groove; 34. Synchronous block; 35. Spring 4; 36. Contact block; 37. Contact strip; 4. Control block; 41. Control groove; 42. Limit block; 43. Limit groove; 44. Spring 5; 45. Moving contact piece 1; 46. Fixed contact piece 1; 5. Gear ring; 51. Inner gear ring; 52. Outer gear ring; 53. Gear 3; 54. Rotating sleeve; 55. Rotating screw; 56. Rotating groove; 57. Insert block; 58. Slot; 59. Rotating base plate; 6. Support plate; 61. Mounting piece; 62. Mounting rod; 63. Torsion spring; 64. Support base plate; 65. Positioning through hole; 66. Positioning rod; 7. Top cover; 71. Mounting groove; 72. Buffer pad; 73. Snap-fit ​​groove; 74. Snap-fit ​​block; 75. Snap-fit ​​groove; 76. Spring three; 77. Inclined surface one; 78. Pressing groove; 79. Pressing block; 8. Buffer block; 81. Buffer groove; 82. Sponge pad; 9. Control assembly; 91. Spring one; 92. Connecting groove; 93. Connecting block; 94. Pull rope; 95. Reset groove; 96. Reset block; 97. Spring two. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-6 This application is described in further detail.

[0039] The embodiment of the present application discloses a building level measuring device. Figure 1 The building level measuring device includes a mobile box 1 with an opening upward, and mobile wheels 11 are installed at the corners of the bottom surface of the mobile box 1. Two mounting plates 61 are fixed on the side of the mobile box 1, and a mounting rod 62 is rotatably installed between the two mounting plates 61. A support plate 6 is sleeved on the outer periphery of the mounting rod 62, and the support plate 6 is rotatably connected to the mounting rod 62. A torsion spring 63 is sleeved on the outer periphery of the mounting rod 62, one end of the torsion spring 63 is fixedly connected to the mounting plate 61, and the other end of the torsion spring 63 is fixedly connected to the support plate 6. A support base plate 64 is fixed to the end of the support plate 6 away from the mounting rod 62, and a positioning through hole 65 is opened on the top surface of the support base plate 64, and a positioning rod 66 is inserted into the positioning through hole 65.

[0040] When the mobile box 1 moves, the support plate 6 rotates upward under the elastic force of the torsion spring 63 and abuts against the side of the mobile box 1; when the mobile box stops moving, the support plate 6 is rotated so that the bottom surface of the support base plate 64 abuts against the ground, and then the positioning rod 66 is passed through the positioning through hole 65 and inserted into the soil, thereby fixing the mobile box 1.

[0041] Reference Figure 2 A movable plate 12 is installed in the movable box 1 for sliding vertically, a measuring instrument 13 is fixed on the top surface of the movable box 1, and a driving assembly 2 for driving the movable plate 12 to move vertically is provided in the movable box 1. The driving assembly 2 includes a driving sleeve 21 rotatably installed on the bottom surface of the movable box 1 and a driving screw 22 fixed on the bottom surface of the movable plate 12. The driving sleeve 21 is sleeved on the outer periphery of the driving screw 22, and the driving screw 22 and the driving sleeve 21 are threadedly matched. A cavity 23 is provided at the bottom of the movable box 1, and a rotating shaft 24 is rotatably installed in the cavity 23. A motor 25 is fixed in the cavity 23, and the output shaft of the motor 25 is fixedly connected to the top end of the rotating shaft 24. A gear 1 26 is sleeved and fixed on the outer periphery of the rotating shaft 24, and a gear 2 27 that meshes with the gear 1 26 is sleeved and fixed on the outer periphery of the driving sleeve 21.

[0042] Reference Figure 2 and Figure 3 A vertically arranged guide rod 28 is fixed to the inner bottom surface of the movable box 1, and a guide sleeve 3 is sleeved on the outer periphery of the guide rod 28. The guide sleeve 3 includes a movable sleeve 32 and a fixed sleeve 31 fixed to the bottom surface of the movable plate 12. The bottom surface of the fixed sleeve 31 is provided with two symmetrically arranged synchronization grooves 33. A synchronization block 34 inserted into the synchronization groove 33 is fixed to the top surface of the movable sleeve 32. The synchronization block 34 is vertically slidably connected to the fixed sleeve 31 through the synchronization groove 33. A spring 4 35 is fixed to the top surface of the synchronization block 34. The top end of the spring 4 35 is fixedly connected to the inner top surface of the synchronization groove 33. Under the elastic force of the spring 4 35, the movable sleeve 32 is in close contact with the fixed sleeve 31.

[0043] Reference Figure 2 and Figure 4A contact block 36 is fixed to the bottom of the movable sleeve 32, and a contact strip 37 that can electrically contact the contact block 36 is embedded and fixed on the inner wall of the movable box 1. A control slot 41 is provided on the top surface of the movable box 1, and the control block 4 is installed on the movable box 1 through the control slot 41 so as to slide vertically. Limit blocks 42 are fixed on both sides of the control block 4, and a limit slot 43 is provided on the inner wall of the control slot 41. The limit blocks 42 are vertically slidably connected to the movable box 1 through the limit slot 43. A spring 5 44 is fixed to the bottom surface of the limit block 42, and the bottom end of the spring 5 44 is fixedly connected to the inner bottom surface of the limit slot 43. A movable contact piece 1 45 is fixed to the bottom surface of the control block 4, and a fixed contact piece 1 46 that can electrically contact the movable contact piece 1 45 is fixed to the bottom surface of the control slot 41. The fixed contact piece 1 46 is electrically connected to the power supply, the movable contact piece 1 45 is electrically connected to the contact strip 37, and the contact block 36 is electrically connected to the motor 25.

[0044] The control block 4 is moved downward, the movable contact piece 45 is electrically contacted with the fixed contact piece 46, and the contact strip 37 is electrically contacted with the contact block 36, the motor 25 is powered on, the motor 25 drives the rotating shaft 24 to rotate, the rotating shaft 24 drives the gear 1 26 to rotate, the gear 1 26 drives the gear 2 27 to rotate, and the gear 2 27 drives the driving sleeve 21 to rotate, thereby moving the movable plate 12 upward; when the movable plate 12 moves to a certain height, the contact block 36 and the contact strip 37 are separated, the motor 25 is powered off, and the movable plate 12 stops moving, thereby limiting the height of the measuring instrument 13; after the measuring instrument 13 is used, the movable sleeve 32 is moved downward, so that the contact block 36 and the contact strip 37 are electrically contacted, and the control block 4 is moved downward at the same time, the motor 25 is powered on and drives the rotating shaft 24 to rotate in the opposite direction, so that the movable plate 12 moves downward and resets.

[0045] Reference Figure 2 and Figure 5 A gear ring 5 is rotatably mounted on the bottom of the moving box 1, and an inner gear ring 51 meshing with the gear one 26 is provided on the inner circumference of the gear ring 5. Rotating grooves 56 are provided at the corners of the bottom surface of the moving box 1, and a rotating sleeve 54 is rotatably mounted in the rotating groove 56. Gear three 53 is sleeved and fixed on the outer circumference of the rotating sleeve 54, and an outer gear ring 52 meshing with the gear three 53 is provided on the outer circumference of the gear ring 5. A rotating screw 55 is inserted into the rotating sleeve 54, and the rotating screw 55 is threadedly matched with the rotating sleeve 54. A rotating bottom plate 59 is fixed to the bottom end of the rotating screw 55. An insert block 57 is fixed to the inner wall of the rotating groove 56, and a slot 58 is provided on the outer circumference of the rotating screw 55. The insert block 57 is vertically slidably connected to the rotating screw 55 through the slot 58.

[0046] The motor 25 rotates, and the motor 25 drives the gear 1 26 to rotate. The gear 1 26 drives the gear ring 5 to rotate. The gear ring 5 drives the gear 3 53 to rotate, and then drives the rotating sleeve 54 to rotate. The insert block 57 provides a limiting effect on the rotating screw 55, so that the rotating screw 55 moves downward, and the bottom surface of the rotating base plate 59 abuts against the ground, thereby supporting the mobile box 1 and the mobile box 1 stops moving.

[0047] Reference Figure 2 and Figure 6 The top surface of the mobile box 1 is provided with a mounting groove 71, and a top cover 7 is inserted into the mounting groove 71. A buffer pad 72 is fixed to the bottom surface of the top cover 7, and the bottom surface of the buffer pad 72 can abut against the top surface of the measuring instrument 13. The inner wall of the mounting groove 71 is provided with a clamping groove 73, and the mobile box 1 is slidably installed with a clamping block 74 along its own width direction through the clamping groove 73. The side of the top cover 7 is provided with a clamping groove 75 for inserting the clamping block 74. A spring three 76 is fixed to the side of the clamping block 74 away from the top cover 7, and one end of the spring three 76 away from the clamping block 74 is fixedly connected to the inner wall of the clamping groove 73. A slope one 77 is provided on the side of the clamping block 74 close to the top cover 7, and the slope one 77 is located on the top surface of the clamping block 74. The top surface of the moving box 1 is provided with a pressing groove 78 connected to the clamping groove 73 , and a pressing block 79 is fixed to the top surface of the clamping block 74 . The pressing block 79 is slidably connected to the moving box 1 along the width direction of the moving box 1 through the pressing groove 78 .

[0048] Reference Figure 2 and Figure 6 The inner wall of the moving box 1 is provided with a buffer groove 81, through which the moving box 1 slides along its width. A sponge pad 82 is fixed to the side of the buffer block 8 near the measuring instrument 13, and the sponge pad 82 can abut the side of the measuring instrument 13. A control assembly 9 is installed inside the moving box 1 to control the movement of the buffer block 8 along the width of the moving box 1.

[0049] Reference Figure 2 and Figure 6 The control assembly 9 includes a spring 1 91 fixed to the side of the buffer block 8, and the end of the spring 1 91 away from the buffer block 8 is fixedly connected to the inner wall of the buffer groove 81. The top surface of the mobile box 1 is provided with a connecting groove 92 connected to the installation groove 71. The mobile box 1 is vertically slidably installed with a connecting block 93 through the connecting groove 92. The top surface of the connecting block 93 can abut against the bottom surface of the top cover 7. A pull rope 94 is fixed to the bottom surface of the connecting block 93, and the other end of the pull rope 94 is fixedly connected to the side of the buffer block 8 away from the moving plate 12. A reset groove 95 is provided on the side of the connecting block 93, and a reset block 96 is fixed to the inner wall of the connecting groove 92 and is inserted into the reset groove 95. A spring 2 97 is fixed to the top surface of the reset block 96, and the top end of the spring 2 97 is fixedly connected to the inner top surface of the reset groove 95. The elastic force of the spring 2 97 is greater than the elastic force of the spring 1 91.

[0050] The working principle of the building level measuring device of the embodiment of the present application is as follows: when the measuring instrument 13 needs to be used, the pressing block 79 is moved in a direction away from the top cover 7, so that the clamping block 74 is disengaged from the clamping slot 75, and then the top cover 7 is removed, the top cover 7 is separated from the connecting block 93, and the connecting block 93 moves upward under the elastic force of the second spring 97. The connecting block 93 drives the buffer block 8 to move in a direction away from the measuring instrument 13 through the pull rope 94, so that the sponge pad 82 is separated from the measuring instrument 13, so that the measuring instrument 13 can be moved upward;

[0051] When the locking cam 72 is in the locked state, the locking cam 75 is locked and the locking cam 76 is locked, so that the top cover 7 is locked and the locking cam 76 is locked.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A building level measuring device, characterized in that: The invention comprises a moving box (1) with an opening facing upward, a top cover (7) being installed on the top surface of the moving box (1), moving wheels (11) being installed at the corners of the bottom surface of the moving box (1), support plates (6) being hingedly connected to the circumference of the bottom of the moving box (1), a supporting bottom plate (64) being fixed on the supporting plate (6), a positioning through hole (65) being opened on the top surface of the supporting bottom plate (64), a positioning rod (66) being inserted into the positioning through hole (65), a moving plate (12) being installed in the moving box (1) along a vertical sliding direction, and the moving box ( 1) is provided with a measuring instrument (13) on the top surface, a buffer groove (81) is provided on the inner wall of the mobile box (1), a buffer block (8) is provided on the mobile box (1) so as to slide along its width direction through the buffer groove (81), a sponge pad (82) is fixed on the side of the buffer block (8) close to the measuring instrument (13), and a control component (9) for controlling the movement of the buffer block (8) along the width direction of the mobile box (1) and a drive component (2) for driving the mobile plate (12) to move vertically are provided in the mobile box (1); The control assembly (9) includes a spring (91) fixed to the side of the buffer block (8), one end of the spring (91) away from the buffer block (8) is fixedly connected to the inner wall of the buffer groove (81), a pull rope (94) is fixed to the side of the buffer block (8) away from the movable plate (12), and a tensioning assembly for pulling the pull rope (94) is provided in the movable box (1); The top surface of the mobile box (1) is provided with an installation groove (71) for inserting the top cover (7), and the top surface of the installation groove (71) is provided with a connecting groove (92). The tensioning assembly includes a connecting block (93), and the connecting block (93) is vertically connected to the mobile box (1) by sliding through the connecting groove (92). The bottom surface of the connecting block (93) is fixedly connected to the end of the pull rope (94) away from the buffer block (8). The side surface of the connecting block (93) is provided with a reset groove (95). The inner wall of the connecting groove (92) is fixed with a reset block (96) that is inserted into the reset groove (95). The top surface of the reset block (96) is fixed with a spring 2 (97), and the top end of the spring 2 (97) is fixedly connected to the inner top surface of the reset groove (95).

2. A building level measuring device according to claim 1, characterized in that: The inner wall of the installation groove (71) is provided with a clamping groove (73), and the mobile box (1) is slidably installed with a clamping block (74) along its own width direction through the clamping groove (73), and the side surface of the top cover (7) is provided with a clamping groove (75) for inserting the clamping block (74).

3. A building level measuring device according to claim 2, characterized in that: A spring three (76) is fixed on the side of the clamping block (74) away from the top cover (7), and one end of the spring three (76) away from the clamping block (74) is fixedly connected to the inner wall of the clamping groove (73). A slope one (77) is provided on the side of the clamping block (74) close to the top cover (7), and the slope one (77) is located on the top surface of the clamping block (74).

4. A building level measuring device according to claim 2, characterized in that: The top surface of the moving box (1) is provided with a pressing groove (78) connected to the clamping groove (73); the top surface of the clamping block (74) is fixed with a pressing block (79); the pressing block (79) is slidably connected to the moving box (1) along the width direction of the moving box (1) through the pressing groove (78).

5. The building level measuring device according to claim 1, characterized in that: The driving assembly (2) comprises a driving sleeve (21) rotatably mounted on the bottom surface of the moving box (1) and a driving screw (22) fixed to the bottom surface of the moving plate (12); the driving screw (22) and the driving sleeve (21) are threadedly matched; a rotating shaft (24) is rotatably mounted in the moving box (1); a motor (25) is provided in the moving box (1); the output shaft of the motor (25) is fixedly connected to the end of the rotating shaft (24); a gear 1 (26) is fixedly sleeved on the outer periphery of the rotating shaft (24); a gear 2 (27) meshing with the gear 1 (26) is fixedly sleeved on the outer periphery of the driving sleeve (21); a guide rod (28) is fixedly sleeved on the bottom surface of the moving box (1); a guide sleeve (3) is sleeved on the outer periphery of the guide rod (28); the top surface of the guide sleeve (3) is connected to the bottom surface of the moving plate (12).

6. A building level measuring device according to claim 5, characterized in that: The guide sleeve (3) includes a movable sleeve (32) and a fixed sleeve (31) fixed to the bottom surface of the movable plate (12). The bottom surface of the fixed sleeve (31) is provided with a synchronization groove (33). The top surface of the movable sleeve (32) is fixed with a synchronization block (34) inserted into the synchronization groove (33). The synchronization block (34) is vertically connected to the fixed sleeve (31) by sliding through the synchronization groove (33). The top of the synchronization block (34) is fixed with a spring (35). The top of the spring (35) is fixedly connected to the inner wall of the synchronization groove (33). The bottom of the movable sleeve (32) is fixed with a contact block (36). ), a contact strip (37) capable of electrically contacting the contact block (36) is fixed on the inner wall of the movable box (1); a control groove (41) is provided on the top surface of the movable box (1), and a control block (4) is mounted on the movable box (1) through the control groove (41) for vertical sliding movement, a movable contact piece (45) is fixed on the bottom surface of the control block (4), and a fixed contact piece (46) capable of electrically contacting the movable contact piece (45) is fixed on the bottom surface of the control groove (41); the fixed contact piece (46) is electrically connected to a power supply, the movable contact piece (45) is electrically connected to the contact strip (37), and the contact block (36) is electrically connected to the motor (25).

7. A building level measuring device according to claim 6, characterized in that: A limiting block (42) is fixed on the side of the control block (4), and a limiting groove (43) is provided on the inner wall of the control groove (41). The limiting block (42) is slidably connected to the moving box (1) in the vertical direction through the limiting groove (43). A spring five (44) is fixed on the bottom surface of the limiting block (42), and the bottom end of the spring five (44) is fixedly connected to the inner bottom surface of the limiting groove (43).

8. The building level measuring device according to claim 5, characterized in that: The bottom surface of the moving box (1) is provided with a plurality of rotating grooves (56), a rotating sleeve (54) is rotatably mounted in the rotating groove (56), a gear three (53) is fixedly mounted on the outer circumference of the rotating sleeve (54), a gear ring (5) is rotatably mounted on the bottom of the moving box (1), the inner circumference of the gear ring (5) is provided with an inner gear ring (51) meshing with the gear one (26), and the outer circumference of the gear ring (5) is provided with an inner gear ring (51) meshing with the gear one (26). The outer gear ring (52) of the wheel three (53) is meshed with each other; a rotating screw (55) is inserted into the rotating sleeve (54), and the rotating screw (55) and the rotating sleeve (54) are threadedly matched; an insert (57) is fixed to the inner wall of the rotating groove (56); a slot (58) is opened on the outer peripheral surface of the rotating screw (55), and the insert (57) is vertically connected to the rotating screw (55) by sliding through the slot (58).

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