Convenient perpendicularity measuring device

Abstract

The utility model provides a convenient verticality measuring device. The convenient verticality measuring device comprises a measuring unit, a control unit, an adjusting support and a positioning support, wherein the measuring unit comprises a telescopic rod, a plurality of laser transmitters arranged on the telescopic rod and a laser receiving module rotationally connected to the telescopic rod; the control unit comprises a controller electrically connected with the laser emitting module and the laser receiving module; the adjusting support is rotationally connected with the measuring unit and is provided with a spirit level; the positioning support is detachably connected to the adjusting support and is provided with an adjustable supporting leg; the measuring unit further comprises a mounting seat and an adjusting mechanism. The device is simple and convenient to operate, an operator only needs to place the device at a set position, adjust the positioning support and the adjusting mechanism and start the laser transmitter, measurement can be completed, and the measurement efficiency and the measurement precision are improved; measurement data can be automatically processed through the controller, so that the measurement efficiency is further improved; the whole structure is simple and easy to manufacture and maintain; and the structure is compact, the occupied space is small, and storage and turnover use are convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of verticality measurement, and in particular relates to a convenient verticality measuring device. Background Art

[0002] In the field of building construction, ensuring the verticality of walls, main bodies, etc. is crucial to the overall quality of the building. However, traditional verticality measurement methods often rely on manual operation, using simple tools such as magnetic plumb bobs and 90° right-angle steel rulers for measurement. This method has low measurement efficiency and is easily affected by operator skills and environmental conditions, resulting in inaccurate measurement results. Therefore, it is urgent to develop a verticality measurement device that is easy to operate, fast and accurate in measurement, which is of great significance to improving the efficiency and quality of building construction. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a convenient verticality measuring device, which improves the efficiency and accuracy of verticality measurement.

[0004] The technical solution adopted by the utility model is: a convenient verticality measuring device, comprising:

[0005] The measuring unit comprises a telescopic rod, a plurality of laser transmitters arranged on the telescopic rod, and a laser receiving module rotatably connected to the telescopic rod;

[0006] A control unit, comprising a controller electrically connected to the laser emitting module and the laser receiving module;

[0007] an adjusting support, rotatably connected to the measuring unit and provided with a level;

[0008] The positioning support is detachably connected to the adjusting support and is provided with an adjustable foot for adjusting the height and verticality of the adjusting support.

[0009] Furthermore, the telescopic rod comprises a laser emitting panel, and a plurality of the laser emitters are arranged on the laser emitting panel along the length direction of the telescopic rod; the laser emitting panel is also provided with an auxiliary positioner.

[0010] Furthermore, the telescopic rod includes a plurality of nested telescopic sections, and adjacent telescopic sections are provided with matching buckles, slots and limit blocks; when adjacent telescopic sections move relatively, the buckles can be embedded in the slots; and the limit blocks are used to limit the movement of the telescopic sections.

[0011] Furthermore, the telescopic joint further comprises a shell, the laser emitting panel is arranged in the shell, and the shell is provided with a notch for the laser beam to pass through; wherein,

[0012] A connecting column is provided on the outer side of the outer shell of the telescopic joint located at the outermost side;

[0013] A sleeve is rotatably connected to the outer side of the connecting column, and the sleeve is connected to the laser receiving module.

[0014] Furthermore, the sleeve is provided with a positioning hole, and can be fixed to the connecting column by a fastener passing through the positioning hole.

[0015] Furthermore, the measuring unit also includes a mounting seat for mounting the telescopic rod, the mounting seat is connected to a rotating sleeve, the rotating sleeve is connected to a fixed shaft through a bearing, and the fixed shaft is connected to the adjusting support.

[0016] Furthermore, the sleeve extends to the mounting seat, and the measuring unit also includes an adjusting mechanism, which includes a hollow shaft slidably connected to the sleeve, a driving assembly and a limiting mechanism; the driving assembly includes a hand crank handle for driving the hollow shaft to rotate; the limiting mechanism includes a knob, and rotating the knob can limit the rotation of the hollow shaft.

[0017] Furthermore, the controller includes a processor and a display. The processor receives the signal from the laser receiving module, calculates the flight time of the laser beam and the distance from the measuring point to the laser emitting plate, obtains the flatness of the measured object, and displays the data on the display.

[0018] Furthermore, the control unit is arranged on the mounting seat.

[0019] Furthermore, the positioning support includes a positioning piece; the adjustment support is threadedly connected to the positioning piece and is provided with a power supply system.

[0020] The advantages and positive effects of the utility model are:

[0021] (1) Easy to operate. The operator only needs to place the device at the set position, adjust the positioning support and adjustment mechanism, and start the laser transmitter to complete the measurement, which improves the measurement efficiency and accuracy.

[0022] (2) The controller can automatically process the measurement data, further improving the measurement efficiency;

[0023] (3) The overall structure is simple, easy to manufacture and maintain; the structure is compact, occupies little space, and is easy to store and circulate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a specific implementation of the utility model;

[0025] Figure 2It is a schematic diagram of a telescopic rod structure of a specific implementation of the utility model;

[0026] Figure 3 It is a schematic diagram of a telescopic joint connection of a specific implementation of the utility model.

[0027] Figure 4 It is a top view of the outermost telescopic joint of a specific implementation of the utility model;

[0028] Figure 5 This is a schematic diagram of the connection of a laser receiving module in a specific implementation of the utility model;

[0029] Figure 6 It is a schematic diagram of the structure of an adjustment mechanism of a specific implementation of the utility model;

[0030] Figure 7 It is a front view of an adjustment mechanism of a specific implementation of the utility model;

[0031] Figure 8 It is a schematic diagram of the connection between a hollow shaft and a sleeve in a specific implementation of the utility model;

[0032] Fig. 9 It is a schematic diagram of the controller structure of a specific implementation of the utility model.

[0033] In the figure:

[0034] 10. Measuring unit 11. Telescopic rod 111. Telescopic joint

[0035] 112, housing 1121, connecting column 113, laser emission panel

[0036] 114, laser transmitter 115, auxiliary positioner 12, laser receiving module

[0037] 13. Sleeve 131, fastener 132, clip

[0038] 14. Mounting seat 141. Fixing plate 15. Rotating jacket

[0039] 16. Bearing 17. Fixed shaft 18. Adjustment mechanism

[0040] 181. Worm 182. Hand crank 183. Turbine

[0041] 184, limit mechanism 1841, knob 1842, limit rod

[0042] 19. Hollow shaft

[0043] 20. Control unit 21. Controller 211. Display

[0044] 212. Operation panel

[0045] 30. Adjustment support 31. Leveler

[0046] 40. Positioning support 41. Positioning member 42. Adjustable support foot DETAILED DESCRIPTION

[0047] The embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0048] like Figure 1 As shown, the utility model proposes a convenient verticality measuring device, including a measuring unit 10, a control unit 20, an adjusting support 30 and a positioning support 40: wherein the measuring unit 10 includes a telescopic rod 11, a plurality of laser emitters 114 arranged on the telescopic rod 11 and a laser receiving module 12 rotatably connected to the telescopic rod 11; the control unit 20 includes a controller 21 electrically connected to the laser emitter 114 and the laser receiving module 12; the adjusting support 30 is rotatably connected to the measuring unit 10 and is provided with a level 31; the positioning support 40 is detachably connected to the adjusting support 30 and is provided with an adjustable foot 42 for adjusting the height and verticality of the adjusting support 30.

[0049] When in use, adjust the position of the positioning support 40 and the angle of the measuring unit 10 so that they are aligned with the measured object, adjust the adjustable foot 42 so that the adjustment support 30 is in a vertical state, and the telescopic rod 11 is also in a vertical state; then adjust the height and angle of the telescopic rod 11 and the angle of the laser receiving module 12 according to the measurement requirements, and control the laser emitter 114 to emit a laser beam through the controller 21. The laser beam is reflected by the measured object and reaches the laser receiving module 12; the laser receiving module 12 transmits the signal to the controller 21, thereby obtaining the verticality of the measured object. The overall process is simple to operate, fast to measure, and highly accurate.

[0050] In the present application, the laser emitter 114 uses a high-precision laser source, which can generate lasers with high stability and precise wavelength. Preferably, a semiconductor fiber laser is used, and the emitted laser has better linearity and more stable energy; the laser emitter 114 is controlled to be turned on and off by the controller 21.

[0051] In a specific embodiment, the adjustment support 30 includes a side wall and an upper end surface, and the level 31 is respectively arranged on the side wall and the upper end surface, and the measuring unit 10 is perpendicular to the upper end surface; through the cooperation of the level 31 and the adjustable support foot 42, the upper end surface can be in a horizontal state, so that the measuring unit 10 and its telescopic rod 11 are in a vertical state.

[0052] Furthermore, the telescopic rod 11 includes a laser emitting panel 113, and a plurality of laser emitters 114 are arranged on the laser emitting panel 113 along the length direction of the telescopic rod 11; the laser emitting panel 113 is also provided with an auxiliary positioner 115 to help the operator to align the measured object and ensure that the laser beam can accurately fall on the measured part of the measured object.

[0053] In a specific embodiment, a plurality of laser emitters 114 are evenly and spaced apart on the laser emission panel 113. When in use, the length of the telescopic rod 11 is adjusted according to the height of the measured object so that the laser emitters 114 are arranged in the height direction of the measured object to meet the verticality measurement requirements.

[0054] In this embodiment, the outer side of the laser emitter 114 is covered with a protective cover to prevent the laser emitter 114 from being affected by dust and causing inaccurate measurement, and to prevent it from being displaced or damaged by collision.

[0055] In a specific embodiment, the length adjustment range of the telescopic rod 11 is 2000 mm-2500 mm, which can cover the wall height in conventional buildings.

[0056] In the present application, the telescopic rod 11 may adopt an electric telescopic structure, a pneumatic telescopic structure or any other form of telescopic structure, which is not limited here.

[0057] In a specific embodiment, Figure 2 , Figure 3 As shown, the telescopic rod 11 includes a plurality of nested telescopic sections 111, and adjacent telescopic sections 111 are provided with matching buckles, slots and limit blocks, so that adjacent telescopic sections 111 can move relative to each other without separation; specifically, when adjacent telescopic sections 111 move relative to each other, the buckles can be embedded in the slots; the limit blocks are used to limit the movement of the telescopic sections 111.

[0058] In this embodiment, if Figure 2 , Figure 3As shown, the above-mentioned telescopic joints 111 are respectively the first telescopic joint, the second telescopic joint and the third telescopic joint, the second telescopic joint is arranged in the cavity inside the first telescopic joint, and the third telescopic joint is arranged in the cavity inside the second telescopic joint; the inner edge of the first telescopic joint is provided with a slot and a limit block convexly arranged on the inner wall, and the limit block includes an upper limit block and a lower limit block; one end of the second telescopic joint is always located on the inner side of the first telescopic joint, and the other end always extends out of the first telescopic joint 1; the edge of one end of the second telescopic joint located on the outside is provided with a buckle matched with the slot, when the second telescopic joint moves toward the inside of the first telescopic joint, the lower limit block plays a limiting role on the second telescopic joint, so that the other end of the second telescopic joint can always be exposed from the first telescopic joint, when the second telescopic joint is pulled to move outside the first telescopic joint, the buckle of the second telescopic joint can be engaged with the slot of the first telescopic joint, and the upper limit block can prevent the second telescopic joint from continuing to move outward; similarly, the second telescopic joint is also provided with the same slot and limit block, and the third telescopic joint is provided with the same buckle.

[0059] In this embodiment, if Figure 3 As shown, the buckle is made of elastic pressure-resistant material; the slot is composed of an upper limit block and an annular structure. When in use, one telescopic joint 111 is pulled so that the buckle is squeezed by the annular structure of another telescopic joint 111 and deformed, and the pulling is stopped after it enters the slot. At this time, the buckle is fixed to the slot under the limit of the upper limit block and the annular structure; at the same time, the upper limit block contacts the outer wall of the telescopic joint 111 to prevent the position of the telescopic joint 111 from shifting, so that the laser emitters 114 of the interconnected telescopic joints 111 are located on the same straight line; when resetting is required, the operator can push the telescopic joint 111.

[0060] In some other embodiments of the present application, the cooperation between the buckle and the slot may also adopt other structures in the prior art, which will not be elaborated here.

[0061] Furthermore, if Figure 4 , Figure 5 As shown, in a preferred embodiment, the telescopic joint 111 includes a shell 112, and the laser emitting panel 113 is arranged in the shell 112, and the shell 112 is provided with a notch for the laser beam to pass through; wherein, a connecting column 1121 is provided on the outer side of the shell 112 of the telescopic joint 111 located on the outermost side; a sleeve 13 is rotatably connected to the outer side of the connecting column 1121, and the sleeve 13 is connected to the laser receiving module 12; this arrangement enables the sleeve 13 to drive the laser receiving module 12 to rotate around the connecting column 1121 to meet the angle requirement for receiving the laser beam signal; at the same time, when the height of the measured object is high and the telescopic joint 111 needs to be extended, the sleeve 13 can slide along the connecting column 1121 to drive the laser receiving module 12 to move to a position matching the telescopic joint 111.

[0062] Specifically, the cross-sectional shape of the sleeve 13 is a part of a circle and is larger than a semicircle. When in use, rotating the sleeve 13 can drive the laser receiving module 12 to rotate around the connecting column 1121 within a certain range to meet the demand of receiving laser signals.

[0063] In the present application, the cross-sectional shape of the housing 112 may be a triangle, a square or other shapes without arcs, and when two adjacent telescopic joints 111 move relative to each other, no axial rotation or offset occurs, making the measurement more accurate.

[0064] In a specific embodiment, the cross-sectional shape of the housing 112 is a triangle, including a first side wall, a second side wall and a third side wall. The laser emission panel 113 is disposed on a mounting block, and the mounting block is connected to the first side wall and the second side wall respectively, so that the laser emission panel 113 is opposite to the third side wall. The other ends of the first side wall and the second side wall are provided with a connecting column 1121, and the third side wall is connected to the connecting column 1121. The outer side of the connecting column 1121 is rotatably connected with a sleeve 13. When the sleeve 13 contacts the third side wall, the laser receiving module 12 can be attached to the third side wall. When the sleeve 13 rotates around the connecting column 1121 to contact the first side wall or the second side wall, an angle is formed between the laser receiving module 12 and the third side wall.

[0065] Furthermore, if Figure 5 As shown, the sleeve 13 is provided with a positioning hole, which can be fixed to the connecting column 1121 through the fastener 131. When the angle and position of the laser receiving module 12 meet the measurement requirements, the sleeve 13 can be fixed by the fastener 131 to prevent the laser receiving module 12 from moving during the measurement process, thereby ensuring accurate measurement. Specifically, the positioning hole is threadedly connected to the fastener 131. When the fastener 131 is rotated, the fastener 131 moves toward the inside of the sleeve 13 and clamps the connecting column 1121.

[0066] Furthermore, if Figure 1 As shown, the measuring unit 10 also includes a mounting base 14 for mounting the telescopic rod 11, the mounting base 14 is connected to a rotating sleeve 15, the rotating sleeve 15 is connected to a fixed shaft 17 through a bearing 16, and the fixed shaft 17 is connected to an adjusting support 30. When the mounting base 14 rotates relative to the adjusting support 30, the measuring unit 10 is driven to rotate to align with the measuring object to meet the use requirements.

[0067] Furthermore, if Figure 1 , Figure 6 , Figure 7As shown, the sleeve 13 extends to the mounting seat 14, and the measuring unit 10 further includes an adjusting mechanism 18, which includes a hollow shaft 19 slidably connected to the sleeve 13, a driving assembly and a limiting mechanism 184; the driving assembly includes a hand crank 182 for driving the hollow shaft 19 to rotate; the limiting mechanism 184 includes a knob 1841, and rotating the knob 1841 can drive the limiting mechanism 184 to rotate to limit the rotation of the hollow shaft 19. When in use, by rotating the hand crank 182, the hollow shaft 19 can be driven to rotate, and then the sleeve 13 can be driven to rotate synchronously. When the laser receiving module 12 connected to the sleeve 13 rotates to the angle required for measurement, the hollow shaft 19 is fixed by rotating the knob 1841; then the sleeve 13 is moved to slide along the hollow shaft 19 and the connecting column 1121, so that the position of the laser receiving module 12 meets the measurement height requirement.

[0068] Preferably, if Figure 7 As shown, the hand crank handle 182 and the knob 1841 are both arranged on the mounting panel of the mounting base 14 , and the mounting panel is constructed to be concave toward the inner side of the mounting base 14 , thereby forming a good protective effect for the hand crank handle 182 and the knob 1841 .

[0069] like Figure 8 As shown, in a specific embodiment, the hollow shaft 19 is sleeved on the outside of the sleeve 13, and the inner wall of the hollow shaft 19 is provided with a slide groove arranged along its length direction, and the outer wall of the part of the sleeve 13 extending into the mounting seat 14 is provided with a matching clamping strip 132, and the clamping strip 132 is embedded in the clamping slot, so that the sleeve 13 can move along the length direction of the hollow shaft 19 and can rotate synchronously with the hollow shaft 19.

[0070] Furthermore, if Figure 6 As shown, the drive assembly also includes a worm 181 and a turbine 183, and a hand crank 182 is provided at one end of the worm 181 extending out of the adjustment support 30; the turbine 183 is meshed with the worm 181; the hollow shaft 19 is connected to the rotating shaft of the turbine 183; the limiting mechanism 184 also includes a limiting rod 1842 connected to the knob 1841, and the knob 1841 can drive the limiting rod 1842 to rotate to engage with the turbine 183, thereby limiting the rotation of the turbine 183. By providing the adjustment mechanism 18 and the limiting mechanism 184, the rotation of the laser receiving module 12 can be finely adjusted and controlled to meet the requirements of measuring the angle.

[0071] Specifically, when in use, the telescopic rod 11, the sleeve 13 and the hollow shaft 19 are all in a vertical state, and the angle adjustment of the laser receiving module 12 is completed by the adjustment mechanism 18. When the telescopic rod 11 does not need to be extended, one end of the sleeve 13 extends into the bottom of the cavity of the hollow shaft 19. When the telescopic rod 11 needs to be extended according to usage requirements, the sleeve 13 moves upward along the hollow shaft 19, and then the fastener 131 is used to fix the sleeve 13 to the connecting column 1121, so that the height of the laser receiving module 12 can match the laser emitter 114.

[0072] Furthermore, the mounting seat 14 is provided with a fixing plate 141 for mounting the worm 181 and the limiting rod 1842. The fixing plate 141 is also provided with a limiting piece, which cooperates with the limiting rod 1842. When the limiting rod 1842 rotates to contact with the limiting piece, it can just engage with the turbine 183, so as to realize effective limitation of the turbine 183.

[0073] In the present application, the controller 21 can control the opening and closing of the laser emitter 114, and can adjust its power to adapt to different measurement environments; the laser receiving module 12 is used to receive the laser beam, including a number of high-sensitivity receivers arranged in an array, the receiver includes a photosensitive element made of a photodiode or a photomultiplier tube, which can detect weak laser signals and convert the laser signals into electrical signals and transmit them to the controller 21. Further, the controller 21 also includes a processor and a display 211. The processor receives the signal transmitted by the laser receiving module 12 and converts the electrical signal into processable data, thereby calculating the flight time of the laser and the distance from the measurement point to the laser emitter 114, obtaining the flatness of the measured object, and displaying the data on the display 211.

[0074] In a specific embodiment, Fig. 9 As shown, the controller 21 also includes an operation panel 212, on which the operator can perform basic operations such as unit switching and measurement mode selection, and can also store or transmit measurement data to an external device; the display 211 can also display information such as measurement time, measurement environment temperature and humidity.

[0075] In this embodiment, the control unit 20 is disposed on the mounting base 14 , and the display 211 and the operation panel 212 are disposed on a mounting surface of the mounting base 14 , so that an operator can conveniently operate and observe the measurement data.

[0076] Furthermore, the positioning support 40 includes a positioning member 41 , the adjustment support 30 is threadedly connected to the positioning member 41 , and is provided with a power supply system, which can supply power to the laser emitter 114 , the laser receiving module 12 and the control unit 20 .

[0077] In a specific embodiment, the positioning support 40 includes a horizontal plate, a positioning member 41 vertically arranged on the upper part of the horizontal plate, and three adjustable feet 42 hinged to the lower part of the horizontal plate. A rubber pad is provided at the bottom end of each adjustable foot 42, which can provide stable support on an uneven ground. The adjustable foot 42 has a connecting portion, which can adjust the length of the adjustable foot 42. When in use, the adjustable foot 42 is adjusted, and the level 31 on the adjustment support 30 is observed, so that the adjustment support 30 is in a vertical state, thereby ensuring that the telescopic rod 11 is in a vertical state, and then the laser emitter 114 is located in the same vertical straight line, so that the verticality of the measured object can be accurately measured. When not in use, the adjustable foot 42 can be retracted and folded for easy movement.

[0078] The working principle of the convenient verticality measuring device proposed in the present application is as follows: according to the height and width of the measured object, the height of the telescopic rod 11 and the height and angle of the laser receiving module 12 are adjusted, and then the laser emitter 114 is started. The laser beam emitted by the laser emitter 114 falls on the measured object to form multiple measuring points and is reflected. The laser receiving module 12 receives the reflected signal of the laser beam and converts the reflected signal into an electrical signal and transmits it to the processor; the processor calculates the distance from each measuring point to the laser emitter 114 according to the flight time and the emission power of the laser beam, forms a measuring line that can reflect the actual situation of the measured object, and compares the measuring line with the virtual vertical line to finally obtain the verticality of the measured object; the processor sends the measurement data to the display 211, and the operator can clearly see the verticality deviation of the measured object and the possible maximum and minimum deviation points.

[0079] The advantages and positive effects of the utility model are:

[0080] (1) Easy to operate. The operator only needs to place the device at the set position, adjust the positioning support and adjustment mechanism, and start the laser transmitter to complete the measurement, which improves the measurement efficiency and accuracy.

[0081] (2) The controller can automatically process the measurement data, further improving the measurement efficiency;

[0082] (3) The overall structure is simple, easy to manufacture and maintain; the structure is compact, occupies little space, and is easy to store and circulate.

[0083] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A convenient verticality measuring device, characterized in that: include: The measuring unit comprises a telescopic rod, a plurality of laser transmitters arranged on the telescopic rod, and a laser receiving module rotatably connected to the telescopic rod; A control unit, including a controller electrically connected to the laser emitting module and the laser receiving module; an adjustment support, rotatably connected to the measuring unit and provided with a leveler; The positioning support is detachably connected to the adjusting support and is provided with an adjustable foot for adjusting the height and verticality of the adjusting support.

2. The verticality measuring device according to claim 1, characterized in that: The telescopic rod comprises a laser emitting panel, and a plurality of laser emitters are arranged on the laser emitting panel along the length direction of the telescopic rod; the laser emitting panel is also provided with an auxiliary positioner.

3. The verticality measuring device according to claim 2, characterized in that: The telescopic rod includes a plurality of nested telescopic sections, and adjacent telescopic sections are provided with matching buckles, slots and limit blocks; when adjacent telescopic sections move relatively, the buckles can be embedded in the slots; the limit blocks are used to limit the movement of the telescopic sections.

4. The verticality measuring device according to claim 3, characterized in that: The telescopic joint further comprises a shell, the laser emitting panel is arranged in the shell, and the shell is provided with a notch for the laser beam to pass through; wherein, A connecting column is provided on the outer side of the outer shell of the telescopic joint located at the outermost side; A sleeve is rotatably connected to the outer side of the connecting column, and the sleeve is connected to the laser receiving module.

5. The verticality measuring device according to claim 4, characterized in that: The sleeve is provided with a positioning hole and can be fixed to the connecting column by a fastener passing through the positioning hole.

6. The verticality measuring device according to claim 4 or 5, characterized in that: The measuring unit further comprises a mounting seat for mounting the telescopic rod, the mounting seat is connected with a rotating sleeve, the rotating sleeve is connected with a fixed shaft via a bearing, and the fixed shaft is connected with the adjusting support.

7. The verticality measuring device according to claim 6, characterized in that: The sleeve extends to the mounting seat, and the measuring unit also includes an adjustment mechanism, which includes a hollow shaft slidably connected to the sleeve, a drive assembly and a limit mechanism; the drive assembly includes a hand crank handle for driving the hollow shaft to rotate; the limit mechanism includes a knob, and rotating the knob can limit the rotation of the hollow shaft.

8. The verticality measuring device according to any one of claims 1 to 5 or 7, characterized in that: The controller includes a processor and a display. The processor receives the signal from the laser receiving module, calculates the flight time of the laser beam and the distance from the measuring point to the laser emitting plate, obtains the flatness of the measured object, and displays the data on the display.

9. The verticality measuring device according to claim 6, characterized in that: The control unit is arranged on the mounting seat.

10. The verticality measuring device according to any one of claims 1 to 5, 7 and 9, characterized in that: The positioning support comprises a positioning piece; the adjusting support is threadedly connected to the positioning piece and is provided with a power supply system.

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