A device for detecting the flatness of building ground

Abstract

The present invention belongs to the field of building construction technology, and specifically relates to a device for detecting the flatness of a building ground, the device for detecting the flatness of a building ground comprises a first ruler body and a second ruler body arranged side by side, and the second ruler body is rotatably connected to one end of the first ruler body, the first ruler body and the second ruler body are both provided with a U-shaped groove inside, and the two U-shaped grooves constitute a rectangular slide, and further comprises: a measuring part, and the measuring part is assembled inside the rectangular slide. The present invention starts a driving motor so that the shell drives the detection wheel to roll on the ground. In the process of following the ups and downs of the ground, the detection wheel detects the moving distance of the detection wheel in the vertical direction through a second distance sensor, and transmits the monitoring signal to a processing element in real time, thereby detecting the flatness of the ground, simplifying the detection process, improving the detection efficiency, and ensuring the validity of the detection data.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a device for detecting the flatness of a building ground. Background Art

[0002] In construction projects, the flatness of the ground is one of the key factors to ensure the quality of the project. The detection of ground flatness is crucial for subsequent construction activities because it directly affects the laying quality and aesthetics of materials such as floors and tiles. At present, there are two main types of ground flatness detection devices commonly used: engineering detection rulers and eight-wheel continuous flatness meters.

[0003] Among them, the eight-wheel continuous flatness meter is an automated testing device that can continuously test the flatness of the ground and provide accurate data. However, this device is large in size and not easy to carry. It usually needs to be transported to the construction site by vehicle. In addition, the eight-wheel continuous flatness meter is expensive and may not be an economical choice for small projects or projects with limited budgets.

[0004] The engineering inspection ruler, also known as the ruler, is a widely used measuring tool in construction and decoration. It is mainly used to evaluate the flatness, verticality and slope of the building surface to ensure the quality and accuracy of construction. It is a simple manual tool with a length of 2 to 3 meters. It has the advantages of simple operation, convenient carrying, simple maintenance and flexible use. It is widely used in small projects, small inspection areas and inspection projects with restricted terrain. However, the following problems still exist in the use of engineering inspection rulers:

[0005] 1. The staff will place the ruler on the ground, and place the wedge-shaped vernier feeler gauge (referred to as: feeler gauge) in the multiple gaps between the ruler and the ground in turn. By observing the maximum scale value on the feeler gauge, the size of the gap can be determined, and then the flatness of the ground can be evaluated. However, in this process, the staff needs to repeatedly measure the size of different gaps, read the scale and record the test value. The detection steps are relatively cumbersome, which leads to low detection efficiency and easy errors in reading the scale.

[0006] 2. Before using a ruler to detect the flatness of the building floor, the staff needs to mark the points to be tested on the ground (including the center point and several test points on the same straight line). Every time the ruler is moved between two adjacent test points, the tail end of the ruler needs to be marked to ensure that the front end of the ruler after movement corresponds to the marked point. In this process, frequent marking is cumbersome, and relying on visual observation, it is impossible to ensure that the ruler is on the same straight line before and after the movement, which can easily cause deviations in the detection and inaccurate detection data.

[0007] Based on the above problems, this application document proposes a device for detecting the flatness of building ground to improve the above problems. Summary of the invention

[0008] The purpose of the present invention is to provide a device for detecting the flatness of building floors. By starting a driving motor, the shell drives the detection wheel to roll on the ground. In the process of following the ups and downs of the ground, the second distance sensor detects the moving distance of the detection wheel in the vertical direction, and transmits the monitoring signal to the processing element in real time, thereby detecting the flatness of the ground, simplifying the detection process, improving the detection efficiency, and ensuring the validity of the detection data.

[0009] The technical solution adopted by the present invention is as follows:

[0010] A device for detecting the flatness of a building floor comprises a first ruler body and a second ruler body arranged side by side, wherein the second ruler body is rotatably connected to one end of the first ruler body, the first ruler body and the second ruler body are both provided with U-shaped grooves inside, and the two U-shaped grooves form a rectangular slide groove, and further comprises:

[0011] A measuring part, the measuring part is assembled inside the rectangular slide groove, the measuring part comprises a shell, a detection slide bar, a detection wheel, a first elastic element, a second distance sensor and a processing element, the shell is slidably connected to the inside of the rectangular slide groove, the detection slide bar is slidably connected to the inside of the shell, the detection wheel is fixed to the lower end of the detection slide bar, the first elastic element is assembled between the detection slide bar and the shell, the second distance sensor is fixed to the inside of the shell and is located at the upper end of the first elastic element, and the detection slide bar is adapted to the second distance sensor, the processing element is fixed to the inside of the shell, and the second distance sensor and the processing element are electrically connected through a wire;

[0012] A positioning portion, the positioning portion being assembled inside the housing;

[0013] A locking assembly, wherein the locking assembly is assembled between the first ruler body and the second ruler body;

[0014] Wherein, in the initial state, the plane where the top of the detection slide bar is located is recorded as the reference plane, and the first elastic element is always in a compressed state.

[0015] In a preferred embodiment, the measuring part also includes: a driving motor, a driving gear and two racks, the driving motor is fixed inside the shell, and the output end of the driving motor extends to the lower end of the shell, the driving gear is fixed to the output end of the driving motor, the two racks are respectively fixed on one side of the inside of the two U-shaped grooves, the two racks are located on the same straight line, and the driving gear and the rack are meshingly connected.

[0016] In a preferred embodiment, guide grooves are provided on both sides of the two U-shaped grooves, sliders are fixed on both sides of the shell, and the sliders are adapted to the guide grooves, and the shell and the rectangular groove are slidably connected via the sliders.

[0017] In a preferred embodiment, the positioning portion includes a positioning slide bar, a second elastic element, a holding element and a plurality of positioning rods, the positioning slide bar is slidably connected to the interior of the shell, the second elastic element is assembled between the positioning slide bar and the shell, the holding element is fixed to the upper end of the positioning slide bar and is located at the upper end of the shell, and the plurality of positioning rods are fixed to the bottom of the positioning slide bar.

[0018] In a preferred embodiment, an anti-skid rubber sleeve is provided on the outer side of the gripping element, and a plurality of anti-skid grooves are provided on the outer side of the anti-skid rubber sleeve.

[0019] In a preferred solution, chamfered surfaces are arranged on the outer sides of the detection slide bar and the positioning slide bar, and a plurality of anti-rotation surfaces are arranged inside the housing, and the plurality of anti-rotation surfaces correspond to the plurality of chamfered surfaces one by one.

[0020] In a preferred embodiment, the lock assembly includes a first locking rod, a locking cross rod, a second locking rod and a third elastic element. The first locking rod is fixed to one end of the first ruler body close to the second ruler body, the locking cross rod is rotatably connected to the outer side of the first locking rod, and a locking groove is provided at one end of the locking cross rod away from the first locking rod. The second locking rod is slidably connected to one end of the second ruler body close to the first ruler body, and the locking groove and the second locking rod are adapted to each other. The third elastic element is assembled between the second locking rod and the second ruler body. In the initial state, the third elastic element is in a compressed state.

[0021] In a preferred embodiment, a snap-fit ​​section and an unlocking groove are provided on the outer side of the second locking rod, and the snap-fit ​​section is located at the upper end of the unlocking groove. When the locking groove and the snap-fit ​​section are in contact with each other, the second locking rod limits the locking cross bar; when the locking groove and the unlocking groove are in contact with each other, the second locking rod releases the limit formed on the locking cross bar.

[0022] The technical effects achieved by the present invention are:

[0023] The present invention drives the driving gear to rotate through a driving motor, and through the cooperation of the driving gear and the rack, the housing slides inside the rectangular slide groove, and the detection wheel is driven to roll on the ground through the housing. In the process of following the ups and downs of the ground, the detection wheel detects the moving distance of the detection wheel in the vertical direction through the second distance sensor, and transmits the monitoring signal to the processing element in real time, processes and screens the relevant signals through the processing element, and outputs the result through the display element. There is no need for the staff to operate the wedge-shaped vernier feeler gauge to repeatedly measure the sizes of different gaps, read the scales and record the detection values, which simplifies the detection process, improves the detection efficiency, avoids the phenomenon that the reading of the wedge-shaped vernier feeler gauge scale is prone to error, and ensures the validity of the detection data;

[0024] After a single flatness detection is completed, the present invention presses the gripping element with the hand of the staff so that the piercing end of the positioning rod contacts the ground, and through the cooperation of multiple positioning rods, the positioning slide bar forms a limit on the shell, and pulls the second scale body, so that the first scale body and the second scale body move relative to the shell in the extension direction of the first scale body, until the first scale body is fitted with the shell again, and then the driving motor is started to perform a second detection. In this process, through the limit of the shell, the positions of the first scale body and the second scale body before and after the movement are located on the same straight line, and the positions before and after the movement can be connected with each other, and the staff does not need to draw lines and marks before the movement, which simplifies the operation process, avoids the deviation of the detection data caused by the position deviation, and improves the detection efficiency and data accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the overall structure of the measuring part of the present invention;

[0028] Figure 4 is a structural cross-sectional view of the measuring part of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure inside the housing of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the positioning part of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the detection slide bar and the positioning slide bar of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the lock assembly of the present invention;

[0033] Fig. 9It is an exploded diagram of the lock assembly of the present invention;

[0034] Fig.10 It is a schematic diagram of the folded state of the device of the present invention.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 10. First ruler body; 11. Second ruler body; 12. Rectangular slide groove; 13. Sliding block; 14. Display element; 15. First distance sensor; 16. Energy storage element;

[0037] 20. Measurement Department;

[0038] 21. housing; 22. detection slide bar; 23. detection wheel; 24. first elastic element; 25. second distance sensor; 26. processing element; 27. drive motor; 28. drive gear; 29. ​​rack;

[0039] 30. Positioning unit;

[0040] 31. Positioning slide bar; 32. Second elastic element; 33. Holding element; 34. Positioning rod;

[0041] 40. Locking assembly;

[0042] 41. First locking rod; 42. Locking cross bar; 43. Second locking rod; 44. Third elastic element; 45. Locking groove; 46. Fastening section; 47. Unlocking groove. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0046] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0047] Please see attached Figures 1 to 5 As shown in the figure, it is the first embodiment of the present invention, which provides a device for detecting the flatness of a building floor, comprising a first ruler body 10 and a second ruler body 11 arranged side by side, one end of the first ruler body 10 is provided with a rotating shaft, and the second ruler body 11 is rotatably connected to one end of the first ruler body 10 through the rotating shaft, the first ruler body 10 and the second ruler body 11 are both provided with U-shaped grooves inside, and the opening ends of the two U-shaped grooves are close to each other, and the two U-shaped grooves are connected to each other to form a rectangular slide groove 12, and further comprising:

[0048] The measuring part 20 is assembled inside the rectangular slide 12. The measuring part 20 includes a housing 21, a detection slide bar 22, a detection wheel 23, a first elastic element 24, a second distance sensor 25 and a processing element 26. The housing 21 is slidably connected to the inside of the rectangular slide 12, the detection slide bar 22 is slidably connected to the inside of the housing 21, the detection wheel 23 is fixed to the lower end of the detection slide bar 22, the first elastic element 24 is assembled between the detection slide bar 22 and the housing 21, the second distance sensor 25 is fixed to the inside of the housing 21 and is located at the upper end of the first elastic element 24, and the detection slide bar 22 and the second distance sensor 25 are adapted, the processing element 26 is fixed to the inside of the housing 21, and the second distance sensor 25 and the processing element 26 are electrically connected through a wire;

[0049] A positioning portion 30, the positioning portion 30 is assembled inside the housing 21;

[0050] A locking assembly 40, the locking assembly 40 is assembled between the first ruler body 10 and the second ruler body 11;

[0051] In the initial state, the plane where the top of the detection slide bar 22 is located is recorded as the reference plane, and the first elastic element 24 is always in a compressed state. The first elastic element 24 can drive the detection wheel 23 to move away from the housing 21.

[0052] It should be noted that the initial state refers to the state when the device is placed on an absolutely flat ground. At this time, the bottom of the first scale body 10 and the second scale body 11 can completely fit the ground without any gap, and the lowest point of the bottom of the detection wheel 23 and the bottom surface of the second scale body 11 are located in the same plane.

[0053] Here, a display element 14 is fixed to the upper end of the shell 21, and the display element 14 is used to display the relevant detection value of the gap. A first distance sensor 15 is fixed to the end of the shell 21 away from the positioning part 30, and the first distance sensor 15 is used to monitor the distance between the shell 21 and the second ruler 11. An energy storage element 16 is fixed inside the shell 21, and a charging interface is also provided on the outside of the shell 21. The display element 14 and the processing element 26, the first distance sensor 15 and the processing element 26, the energy storage element 16 and the charging interface, the energy storage element 16 and the processing element 26, and the energy storage element 16 and the driving electric The machines 27 are electrically connected through wires. The processing element 26 can process the detection signals sent by the first distance sensor 15 and the second distance sensor 25, and control the display element 14 and the drive motor 27 to work according to the corresponding detection signals. A matching program is also provided inside the processing element 26. In each independent detection process, after all detection values ​​are obtained through the cooperation of the second distance sensor 25 and the processing element 26, the matching program can screen out several larger detection values ​​from all the detection values, and the staff can observe the above detection values ​​through the display element 14.

[0054] It should be noted that the device has a working state and a folded state. When the device is in the working state, the second ruler 11 is located in the extension direction of the first ruler 10. At this time, the length of the device is the largest. When the device is in the folded state, the length of the device is shorter.

[0055] Furthermore, when using this device to detect the flatness of the ground, it is necessary to preset a starting point and a detection direction on the ground to determine the starting position and the moving direction of the device when the detection is performed for the first time. Compared with the existing usage method, only one starting point and moving direction need to be set, and there is no need to set multiple detection points.

[0056] In this embodiment, when the flatness of the ground is detected, the first scale body 10 and the second scale body 11 in the working state are placed on the ground according to the starting point and the detection direction, so that the first scale body 10 and the second scale body 11 are in contact with the ground. At this time, the first elastic element 24 in the compressed state drives the detection wheel 23 to contact the ground. Since the shell 21 is slidably connected to the inside of the rectangular slide groove 12, the shell 21 is driven to slide in the rectangular slide groove 12 along the extension direction of the first scale body 10. Through the sliding connection between the shell 21 and the detection wheel 23, the shell 21 drives the detection wheel 23 to move along the extension direction of the first scale body 10. During the movement, the detection wheel 23 is moved by the shell 21. The measuring wheel 23 rolls on the ground. At the same time, due to the undulation of the ground, the detecting wheel 23 will synchronously move in the vertical direction during the rolling process. The moving distance of the detecting slide bar 22 relative to the reference plane is monitored by the second distance sensor 25, and the monitoring signal is transmitted to the processing element 26 in real time. The processing element 26 processes and filters the relevant signals, and outputs the results through the display element 14. There is no need for the staff to operate the wedge-shaped vernier feeler gauge to repeatedly measure the sizes of different gaps, read the scales and record the detection values, which simplifies the detection process, improves the detection efficiency, avoids the phenomenon of easy errors in reading the scales of the wedge-shaped vernier feeler gauge, and ensures the validity of the detection data.

[0057] Next, please refer to Figure 4 and Figure 5 As shown, the measuring part 20 also includes: a driving motor 27, a driving gear 28 and two racks 29. The driving motor 27 is fixed inside the shell 21, and the output end of the driving motor 27 extends to the lower end of the shell 21. The driving gear 28 is fixed to the output end of the driving motor 27. The two racks 29 are respectively fixed to one side of the inside of the two U-shaped grooves. The two racks 29 are located on the same straight line, and the driving gear 28 and the racks 29 are meshed and connected.

[0058] In this embodiment, when the flatness of the ground is detected, the drive motor 27 is started to rotate the output end of the drive motor 27. The drive motor 27 and the drive gear 28 are fixedly connected, so that the drive motor 27 drives the drive gear 28 to rotate. Since the first scale body 10 and the second scale body 11 remain relatively still with the ground, and the rack 29 is fixed inside the U-shaped groove, the rack 29 and the drive gear 28 cooperate with each other, so that the drive gear 28 drives the housing 21 to move inside the rectangular slide groove 12, and then drives the housing 21 to move inside the rectangular slide groove 12, and then drives the detection wheel 23 to roll on the ground through the housing 21. The detection wheel 23 and the second distance sensor 25 cooperate to detect the flatness of the ground, and there is no need for the staff to operate the wedge-shaped vernier feeler gauge to repeatedly measure the sizes of different gaps, read the scales and record the detection values, thereby simplifying the detection process and improving the detection efficiency.

[0059] Secondly, please also refer to Figure 2 , Figure 3 and Figure 5 As shown, guide grooves are provided on both sides of the two U-shaped grooves, and the two U-shaped grooves on the same side are interconnected, sliders 13 are fixed on both sides of the shell 21, and the sliders 13 are adapted to the guide grooves, and the shell 21 and the rectangular groove 12 are slidably connected through the sliders 13.

[0060] In this embodiment, the cooperation between the slider 13 and the guide slot can guide and limit the housing 21 during its movement, thereby preventing the housing 21 from moving relative to the first scale body 10 and the second scale body 11 in the vertical direction.

[0061] Next, please refer to Figures 4 to 7 As shown, the positioning portion 30 includes a positioning slide bar 31, a second elastic element 32, a gripping element 33 and a plurality of positioning rods 34. The positioning slide bar 31 is slidably connected to the interior of the shell 21. The second elastic element 32 is assembled between the positioning slide bar 31 and the shell 21. The gripping element 33 is fixed to the upper end of the positioning slide bar 31 and is located at the upper end of the shell 21. The plurality of positioning rods 34 are all fixed to the bottom of the positioning slide bar 31 and are located at the bottom of the shell 21. A piercing end is provided at one end of the positioning rod 34 away from the positioning slide bar 31.

[0062] It should be noted that the second elastic element 32 is always in a compressed state. When no external force is applied to the holding element 33, the positioning rod 34 is located inside the rectangular slide groove 12. Through the above-mentioned arrangement, it is possible to prevent the piercing end of the positioning rod 34 from injuring the staff. Furthermore, a protective cover can be tied to the outer side of the positioning rod 34 to prevent the piercing end of the positioning rod 34 from injuring the staff.

[0063] For further information, see Figure 7 As shown, the outer sides of the detection slide bar 22 and the positioning slide bar 31 are both provided with chamfered surfaces, and the interior of the shell 21 is provided with multiple anti-rotation surfaces, and the multiple anti-rotation surfaces correspond to the multiple chamfered surfaces one by one. The setting of the chamfered surfaces and the anti-rotation surfaces can prevent relative rotation between the shell 21, the detection slide bar 22 and the positioning slide bar 31.

[0064] In this embodiment, after a single flatness detection is completed, the driving motor 27 drives the housing 21 to move to the end of the second scale body 11 away from the first scale body 10. At this time, the first scale body 10 and the second scale body 11 need to be moved for the next detection, and it is necessary to ensure that the positions of the device before and after movement can be connected. At this time, the staff presses the gripping element 33 with their hands to move the gripping element 33 toward the ground. The gripping element 33 is fixedly connected to the positioning slide bar 31, so that the gripping element 33 drives the positioning slide bar 31 to move, and the positioning slide bar 31 squeezes the second elastic element 32, so that the positioning slide bar 31 is further compressed. The positioning slide bar 31 is fixedly connected to the positioning rod 34, so that the positioning slide bar 31 drives the positioning rod 34 toward the ground. When the piercing end of the positioning rod 34 contacts the ground, the positioning rod 34 is moved toward the ground. The cooperation of the plurality of positioning rods 34 limits the positioning slide bar 31 to prevent the positioning slide bar 31 from moving relative to the ground. At the same time, the chamfered surface provided on the outer side of the positioning slide bar 31 can prevent the housing 21 from rotating relative to the positioning slide bar 31, and pull the second scale body 11, so that the first scale body 10 and the second scale body 11 move relative to the housing 21 in the extension direction of the first scale body 10, until the first scale body 10 is fitted with the housing 21 again, and the driving motor 27 is started to perform a second detection. In this process, through the limitation of the housing 21, the positions of the first scale body 10 and the second scale body 11 before and after the movement are located on the same straight line, and the positions before and after the movement can be connected to each other, without the need for staff to draw lines and marks before the movement, which simplifies the operation process, avoids the deviation of the detection data caused by the position deviation, and improves the detection efficiency and data accuracy.

[0065] In a preferred embodiment, an anti-skid rubber sleeve is disposed on the outer side of the gripping element 33 , and a plurality of anti-skid grooves are disposed on the outer side of the anti-skid rubber sleeve. The material of the anti-skid rubber sleeve is preferably rubber.

[0066] It should be noted that the cross-sectional shape of the gripping element 33 can be circular, spherical, rectangular or other shapes that are easy to grip. In the present embodiment, a spherical shape is preferred to increase the contact area between the operator's hand and the gripping element 33. Of course, it can only achieve the purpose of gripping and does not constitute a specific limitation.

[0067] In this embodiment, the provision of the anti-slip sleeve can increase the friction between the worker's hand and the gripping element 33, making it easier for the worker to apply force.

[0068] Please refer again Figure 8 and Fig. 9As shown, the lock assembly 40 includes a first lock rod 41, a lock cross bar 42, a second lock rod 43 and a third elastic element 44. The first lock rod 41 is fixed to one end of the first ruler body 10 close to the second ruler body 11, the lock cross bar 42 is rotatably connected to the outer side of the first lock rod 41, and a lock groove 45 is formed at one end of the lock cross bar 42 away from the first lock rod 41. The second lock rod 43 is slidably connected to one end of the second ruler body 11 close to the first ruler body 10, and the lock groove 45 and the second lock rod 43 are adapted to each other. The third elastic element 44 is assembled between the second locking rod 43 and the second ruler body 11. In the initial state, the third elastic element 44 is in a compressed state. A buckling section 46 and an unlocking groove 47 are provided on the outer side of the second locking rod 43. The buckling section 46 is located at the upper end of the unlocking groove 47. When the locking groove 45 and the buckling section 46 are in contact with each other, the second locking rod 43 limits the locking cross bar 42; when the locking groove 45 and the unlocking groove 47 are in contact with each other, the second locking rod 43 releases the limit formed on the locking cross bar 42.

[0069] It should be noted that the outer diameter of the locking section 46 is greater than the outer diameter of the unlocking groove 47 .

[0070] In this implementation, see Figure 1 and Fig.10 As shown, in the working state, the first ruler 10 and the second ruler 11 can be integrated into one by the cooperation of the first locking rod 41, the locking cross rod 42 and the second locking rod 43, so that the first ruler 10 and the second ruler 11 can be prevented from rotating relative to each other during the process of moving the positions of the first ruler 10 and the second ruler 11. In the folded state, the locking cross rod 42 can limit the open ends of the two U-shaped grooves to prevent the shell 21 from falling off from the inside of the U-shaped groove. At the same time, the first ruler 10 and the second ruler 11 in the folded state can be prevented from rotating relative to each other. When it is necessary to release the limit of the second locking rod 43 by the locking cross rod 42, the second locking rod 43 is pressed to make the unlocking groove 47 slide to the inside of the locking groove 45, so that the locking cross rod 42 can be rotated to release the limit of the locking cross rod 43 by the second locking rod 43, and the first ruler 10 and the second ruler 11 can be relatively rotated, so that the device can be switched between the working state and the folded state.

[0071] The working principle of the present invention is:

[0072] When the flatness of the ground is detected, the first ruler 10 and the second ruler 11 in working state are placed on the ground according to the starting point and the detection direction, so that the first ruler 10 and the second ruler 11 are in contact with the ground. At this time, the first elastic element 24 in the compressed state drives the detection wheel 23 to contact with the ground, starts the driving motor 27, and drives the driving gear 28 to rotate. Through the cooperation of the driving gear 28 and the rack 29, the driving motor 27 drives the shell 21 to slide inside the rectangular slide groove 12, and drives the detection wheel 23 to roll on the ground through the shell 21. Through the cooperation of the detection wheel 23 and the second distance sensor 25, the flatness of the ground is detected. When the first distance sensor 15 detects that the distance between the shell 21 and the second ruler 11 is 0, the driving motor 27 is turned off through the processing element 26. After the processing element 26 obtains the detection data and processes the detection data, it is finally displayed through the display element 14. After a single flatness detection is completed, the driving motor 27 drives the detection wheel 23 to roll on the ground. The movable housing 21 moves to the end of the second scale body 11 away from the first scale body 10. At this time, the first scale body 10 and the second scale body 11 need to be moved for the next detection, and it is necessary to ensure that the positions of the device before and after the movement can be connected. At this time, the staff presses the holding element 33 with their hands to make the piercing end of the positioning rod 34 contact the ground. The positioning slide bar 31 is prevented from moving relative to the ground through the cooperation of multiple positioning rods 34. The second scale body 11 is pulled to make the first scale body 10 and the second scale body 11 move relative to the housing 21 in the extension direction of the first scale body 10 until the first scale body 10 is fitted with the housing 21 again. The driving motor 27 is started to perform the second detection. In this process, the positions of the first scale body 10 and the second scale body 11 before and after the movement are on the same straight line, and the positions before and after the movement can be connected with each other. There is no need for the staff to mark before the movement, which simplifies the operation process and avoids the deviation of the detection data caused by the position deviation.

[0073] The above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the art unless otherwise specified and limited.

Claims

1. A device for detecting the flatness of a building floor, characterized in that: The invention comprises a first ruler body (10) and a second ruler body (11) arranged side by side, wherein the second ruler body (11) is rotatably connected to one end of the first ruler body (10), the first ruler body (10) and the second ruler body (11) are both provided with U-shaped grooves inside, and the two U-shaped grooves form a rectangular slide groove (12), and further comprises: A measuring part (20), the measuring part (20) being mounted inside the rectangular slide groove (12), the measuring part (20) comprising a housing (21), a detection slide bar (22), a detection wheel (23), a first elastic element (24), a second distance sensor (25) and a processing element (26), the housing (21) being slidably connected to the inside of the rectangular slide groove (12), the detection slide bar (22) being slidably connected to the inside of the housing (21), the detection wheel (23) being fixed to the lower end of the detection slide bar (22), the first elastic element (24) being mounted between the detection slide bar (22) and the housing (21), the second distance sensor (25) being fixed to the inside of the housing (21) and being located at the upper end of the first elastic element (24), the detection slide bar (22) and the second distance sensor (25) being matched with each other, the processing element (26) being fixed to the inside of the housing (21), and the second distance sensor (25) and the processing element (26) being electrically connected via a wire; a positioning portion (30), the positioning portion (30) being mounted inside the housing (21), the positioning portion (30) comprising a positioning slide bar (31), a second elastic element (32), a holding element (33) and a plurality of positioning rods (34), the positioning slide bar (31) being slidably connected inside the housing (21), the second elastic element (32) being mounted between the positioning slide bar (31) and the housing (21), the holding element (33) being fixed to an upper end of the positioning slide bar (31) and being located at an upper end of the housing (21), and the plurality of positioning rods (34) being fixed to a bottom of the positioning slide bar (31); A locking assembly (40), wherein the locking assembly (40) is assembled between the first ruler body (10) and the second ruler body (11); Wherein, in the initial state, the plane where the top of the detection slide bar (22) is located is recorded as the reference plane, and the first elastic element (24) is always in a compressed state.

2. The device for detecting the flatness of a building floor according to claim 1, characterized in that: The measuring part (20) further comprises: a driving motor (27), a driving gear (28) and two racks (29); the driving motor (27) is fixed inside the housing (21), and the output end of the driving motor (27) extends to the lower end of the housing (21); the driving gear (28) is fixed to the output end of the driving motor (27); the two racks (29) are respectively fixed to one side inside the two U-shaped grooves; the two racks (29) are located on the same straight line, and the driving gear (28) and the racks (29) are meshingly connected.

3. The device for detecting the flatness of a building floor according to claim 1, characterized in that: Guide slide grooves are provided on both sides of the two U-shaped grooves, sliders (13) are fixed on both sides of the shell (21), and the sliders (13) are matched with the guide slide grooves, and the shell (21) and the rectangular slide groove (12) are slidably connected via the sliders (13).

4. The device for detecting the flatness of a building floor according to claim 1, characterized in that: The outer side of the gripping element (33) is provided with an anti-skid rubber sleeve, and the outer side of the anti-skid rubber sleeve is provided with a plurality of anti-skid grooves.

5. The device for detecting the flatness of a building floor according to claim 1, characterized in that: The outer sides of the detection slide bar (22) and the positioning slide bar (31) are both provided with chamfered surfaces, and the interior of the housing (21) is provided with a plurality of anti-rotation surfaces, and the plurality of anti-rotation surfaces correspond to the plurality of chamfered surfaces in a one-to-one manner.

6. The device for detecting the flatness of a building floor according to claim 1, characterized in that: The lock assembly (40) comprises a first locking rod (41), a locking cross rod (42), a second locking rod (43) and a third elastic element (44); the first locking rod (41) is fixed to one end of the first ruler (10) close to the second ruler (11); the locking cross rod (42) is rotatably connected to the outside of the first locking rod (41); one end of the locking cross rod (42) away from the first locking rod (41) is provided with a locking groove (45); the second locking rod (43) is slidably connected to one end of the second ruler (11) close to the first ruler (10), and the locking groove (45) and the second locking rod (43) are matched; the third elastic element (44) is assembled between the second locking rod (43) and the second ruler (11); in an initial state, the third elastic element (44) is in a compressed state.

7. The device for detecting the flatness of a building floor according to claim 6, characterized in that: The outer side of the second locking rod (43) is provided with a buckling section (46) and an unlocking groove (47); the buckling section (46) is located at the upper end of the unlocking groove (47); when the locking groove (45) and the buckling section (46) are in contact with each other, the second locking rod (43) limits the locking cross bar (42); when the locking groove (45) and the unlocking groove (47) are in contact with each other, the second locking rod (43) releases the limit formed on the locking cross bar (42).

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