Measuring tool

Abstract

The utility model relates to the technical field of construction engineering cost, in particular to a measuring tool. Comprising a frame assembly, a measuring assembly and an adjusting assembly, the frame assembly comprises a frame base and a tool box, the measuring assembly comprises a measuring box and a laser range finder, the adjusting assembly comprises an adjusting box, a sleeve is arranged on the inner side of a mounting side plate, a bearing plate is arranged on the inner side of the measuring box, and a sliding rod is connected to the outer wall of the bearing plate. The lower end of the adjusting block is connected with a linkage plate. After the use position of the laser range finder is adjusted, the measurement parameters of the laser range finder are set on the operation panel, the laser range finder is started and the building foundation pit is measured, so that the problem that the measurement accuracy is influenced by personal factors of a user in the process of manually holding the range finder for measurement is solved, and the measurement accuracy is improved by pressing a start button. The laser range finder emits laser for measurement, and measurement data are read and recorded.

Description

Technical Field

[0001] This utility model relates to the field of construction engineering cost technology, specifically a measuring tool. Background Technology

[0002] Construction project cost generally refers to the expenses incurred in carrying out a certain project, that is, the total cost from planning to completion, acceptance and handover. It consists of construction and installation costs, equipment and tool purchase costs, other construction costs, contingency costs and taxes. In the process of calculating costs, surveying tools are used to measure the various attributes of the construction site in order to more accurately control costs.

[0003] Currently, the depth of building foundation pits is mainly measured manually using handheld rangefinders. Since the rangefinders are handheld, the measurement process is affected by the user's personal factors. Although laser rangefinders measure distance by emitting and receiving laser pulses and do not rely on visible light to identify targets, obstacles in the building foundation pit can still affect the reflection of the laser and thus the accuracy of the measurement. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a measuring tool that solves the problem that, since the operation of a handheld rangefinder is affected by the user's personal factors, and although laser rangefinders measure distance by emitting and receiving laser pulses rather than relying on visible light to identify targets, obstacles in the construction pit can still affect the reflection of the laser and thus the accuracy of the measurement. The tool provides an adjustment block to control the position of the laser rangefinder, and a lighting system to help the operator better observe the interior of the construction pit and select a suitable measurement point.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A measuring tool, comprising a frame assembly, a measuring assembly, and an adjusting assembly. The frame assembly includes a frame base and a toolbox. The measuring assembly includes a measuring box and a laser rangefinder. The adjusting assembly includes an adjusting box. The frame base is welded with a mounting side plate. A sleeve is provided on the inner side of the mounting side plate. A first screw is provided on the inner side of the sleeve. The first screw and the sleeve are rotated and lifted through a threaded connection. A bearing groove is formed on the inner side of the measuring box. A straight sliding groove is formed on the inner wall of the bearing groove. A bearing plate is provided on the inner side of the measuring box. A sliding rod is connected to the outer wall of the bearing plate. A clearance groove is formed on the inner side of the bearing plate. An adjusting groove is formed on the top wall of the measuring box. A motor is provided on the inner side of the adjusting box. The output end of the motor is connected to a second screw through a coupling. An adjusting block is provided on the outer ring of the second screw. A linkage plate is connected to the lower end of the adjusting block.

[0006] The beneficial effects of this utility model are as follows: After the motor starts running, it works and drives the second screw to rotate. With the lighting, although the laser rangefinder measures distance by emitting and receiving laser pulses, its working principle is based on the propagation speed and reflection time of the laser, rather than relying on visible light to identify the target. In the dark environment of the construction pit, the laser can still be emitted and reflected normally, and the laser rangefinder can measure the distance. However, when there are obstacles in the construction pit, it will affect the reflection effect of the laser, resulting in inaccurate measurement. The lighting can help the operator to better observe the situation inside the construction pit so as to select a suitable measurement point.

[0007] The toolbox is used simultaneously for mounting and securing the measuring box and the adjustment box:

[0008] As a further improvement to the above technical solution: the lower end of the frame base is connected to a universal wheel with double locking function, the top of the frame base is connected to a toolbox, the measuring box is installed on the top of the toolbox, and the toolbox is equipped with an adjustable partition.

[0009] The beneficial effects of this improvement are: by setting up a toolbox, auxiliary tools such as measuring tapes and levels can be stored in separate areas according to tool type, and the toolbox is also used to install and fix measuring boxes and adjustment boxes.

[0010] To lock the first screw using a locking nut, ensuring the stability of the laser rangefinder during depth measurement:

[0011] As a further improvement to the above technical solution: the mounting side plates are arranged in pairs, and each pair of mounting side plates is symmetrically distributed about the central axis of the vehicle frame base. The inner wall of the sleeve is provided with internal threads. The first screw is rotatably connected to the sleeve by threads. The outer ring of the first screw is rotatably connected to a locking nut by threads. The lower end of the first screw is connected to a positioning cover with a bottom anti-slip flat structure.

[0012] The beneficial effects of this improvement are as follows: push the device to the predetermined measurement position, observe whether the frame base is level, rotate the first screw in sequence, and during the rotation of the first screw, drive the positioning cover to gradually approach the ground until the positioning cover is in contact with the ground. Then use the locking nut to lock the first screw to ensure the stability of the laser rangefinder during depth measurement.

[0013] For storage and protection of the laser rangefinder after measurement:

[0014] As a further improvement to the above technical solution: the inner wall of the bearing groove is provided with a sliding groove that matches the size of the sliding rod; the open end of the measuring box is rotatably connected to a protective door via a hinge; the protective door and the measuring box are equipped with matching locks; and a sealing strip is provided between the protective door and the measuring box.

[0015] The beneficial effects of this improvement are as follows: the bearing groove is used to store and protect the laser rangefinder after measurement; the sliding groove is used for the sliding rod to slide. The laser rangefinder is pushed into the bearing groove along the sliding groove to ensure that the sliding rod is fully inserted into the sliding groove, the protective door is closed, and the key is inserted to turn the lock.

[0016] To avoid being affected by personal factors during manual measurement using a handheld rangefinder:

[0017] As a further improvement to the above technical solution: the laser rangefinder is securely mounted on the support plate by screws, and both the laser emitting end and the laser receiving end of the laser rangefinder have corresponding clearance slots. The position and shape of the clearance slots ensure that laser emission and reception are not obstructed.

[0018] The beneficial effects of this improvement are as follows: After adjusting the position of the laser rangefinder, the measurement parameters of the laser rangefinder are set on the operation panel, the laser rangefinder is started and the building foundation pit is measured, thereby avoiding the problem of measurement accuracy being affected by the user's personal factors during the manual handheld measurement process. Pressing the start button, the laser rangefinder emits a laser to measure, and reads and records the measurement data.

[0019] To enable operators to better observe the interior of the construction pit and select appropriate measurement points:

[0020] As a further improvement to the above technical solution: the motor is connected to the operation panel via a control circuit, the inner wall of the adjustment box is connected to a partition plate, the partition plate divides the interior of the adjustment box into an installation area and a transmission area, the end of the second screw away from the motor passes through the partition plate and is rotatably connected to the inner wall of the adjustment box via a bearing, and a lighting lamp is installed on the bottom inner side of the front end of the bearing plate, the lighting lamp is a waterproof LED lamp with adjustable brightness.

[0021] The beneficial effects of this improvement are as follows: After the motor starts running, it works and drives the second screw to rotate. With the lighting, although the laser rangefinder measures distance by emitting and receiving laser pulses, its working principle is based on the propagation speed and reflection time of the laser, rather than relying on visible light to identify targets. In the dark environment of the construction pit, the laser can still be emitted and reflected normally, and the laser rangefinder can measure the distance. However, when there are obstacles in the construction pit, the reflection effect of the laser will be affected, leading to inaccurate measurements. The lighting can help the operator better observe the situation inside the construction pit so as to select a suitable measurement point.

[0022] To adjust the position of the laser rangefinder by operating the adjustment block:

[0023] As a further improvement to the above technical solution: the adjusting block is rotatably connected to the second screw, the internal thread of the adjusting block is engaged with the external thread of the second screw, and two smooth-surfaced limiting rods are provided on the inner side of the adjusting box. The two limiting rods are symmetrically arranged at the upper and lower ends of the second screw. One end of the limiting rod is connected to the inner wall of the adjusting box, and the end of the limiting rod away from the inner wall of the adjusting box is connected to the partition plate. The limiting rod is slidably connected to the adjusting block.

[0024] The beneficial effects of this improvement are as follows: after the motor is started, the adjusting block moves linearly under the action of the second screw and the limit rod, and the movement of the adjusting block is used to adjust the position of the laser rangefinder.

[0025] To ensure the linkage plate pushes the carrier plate horizontally within the measuring box, observe the movement of the carrier plate to guarantee that the laser rangefinder accurately reaches the measuring position:

[0026] As a further improvement to the above technical solution: the adjustment box is installed on the top of the measuring box, the adjustment box and the measuring box are connected by bolts, the inner side of the wall connecting the adjustment box and the measuring box is provided with a smooth inner wall adjustment groove, and the end of the linkage plate away from the adjustment block passes through the adjustment groove and extends to connect with the bearing plate.

[0027] The beneficial effects of this improvement are as follows: when the motor is started, the adjusting block moves and drives the linkage plate, which in turn pushes the carrier plate to move horizontally within the measuring box. By observing the movement of the carrier plate, it can be ensured that the laser rangefinder accurately reaches the measuring position. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0029] Figure 2 This is a cross-sectional view of the measuring box of this utility model.

[0030] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle.

[0031] Figure 4 This is a schematic diagram of the structure of the bearing plate of this utility model.

[0032] Figure 5 This is a schematic diagram of the measuring box of this utility model.

[0033] In the diagram: 1. Frame assembly; 11. Frame base; 12. Locking nut; 13. Mounting side plate; 14. Sleeve; 15. First screw; 16. Positioning cover; 17. Toolbox; 2. Measuring assembly; 21. Measuring box; 22. Bearing groove; 23. Sliding groove; 24. Bearing plate; 25. Clearance groove; 26. Sliding rod; 27. Laser rangefinder; 28. Adjustment groove; 29. ​​Protective door; 3. Adjustment assembly; 31. Adjustment box; 32. Motor; 33. Second screw; 34. Divider plate; 35. Limiting rod; 36. Adjusting block; 37. Linkage plate; 38. Lighting lamp. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0035] like Figure 1-5As shown, a measuring tool includes a frame assembly 1, a measuring assembly 2, and an adjusting assembly 3. The frame assembly 1 includes a frame base 11 and a toolbox 17. The measuring assembly 2 includes a measuring box 21 and a laser rangefinder 27. The adjusting assembly 3 includes an adjusting box 31. The frame base 11 is welded with a mounting side plate 13. A sleeve 14 is provided on the inner side of the mounting side plate 13. A first screw 15 is provided on the inner side of the sleeve 14. The first screw 15 and the sleeve 14 are screwed together to achieve rotation and lifting. The inner side of the measuring box 21 has a bearing groove 22. The inner wall of the bearing groove 22 has a straight sliding groove 23. The measuring box... A bearing plate 24 is provided on the inner side of the measuring box 21. A sliding rod 26 is connected to the outer wall of the bearing plate 24. A clearance groove 25 is opened on the inner side of the bearing plate 24. An adjustment groove 28 is opened on the top wall of the measuring box 21. A motor 32 is provided on the inner side of the adjustment box 31. The output end of the motor 32 is connected to a second screw 33 through a coupling. An adjustment block 36 is provided on the outer ring of the second screw 33. A linkage plate 37 is connected to the lower end of the adjustment block 36. A universal wheel with double locking function is connected to the lower end of the frame base 11. A toolbox 17 is connected to the top of the frame base 11. The measuring box 21 is installed on the top of the toolbox 17. The toolbox 17 has an adjustable partition inside; the toolbox 17 is used to store auxiliary tools such as measuring tapes and levels according to tool type. The toolbox 17 is also used to install and fix the measuring box 21 and the adjusting box 31. The mounting side plates 13 are arranged in pairs, with each pair symmetrically distributed about the central axis of the frame base 11. The inner wall of the sleeve 14 has internal threads. The first screw 15 is threadedly rotatably connected to the sleeve 14. A locking nut 12 is threadedly rotatably connected to the outer ring of the first screw 15. The lower end of the first screw 15 is connected to a positioning cover 16 with a non-slip flat bottom. The device is pushed to the predetermined measuring position. Place the first screw 15 and observe whether the frame base 11 is level. Rotate the first screw 15 in sequence. During the rotation, the first screw 15 will drive the positioning cover 16 to gradually approach the ground until the positioning cover 16 is in contact with the ground. Then, use the locking nut 12 to lock the first screw 15 to ensure the stability of the laser rangefinder 27 during depth measurement. The inner wall of the bearing groove 22 is provided with a sliding groove 23 that matches the size of the sliding rod 26. The opening end of the measuring box 21 is connected to the protective door 29 by a hinge. The protective door 29 and the measuring box 21 are equipped with matching locks. A sealing strip is provided between the protective door 29 and the measuring box 21.The support groove 22 is used to store and protect the laser rangefinder 27 after measurement. The sliding groove 23 is used for the sliding rod 26 to slide. The laser rangefinder 27 is pushed into the support groove 22 along the sliding groove 23, ensuring the sliding rod 26 is fully inside. The protective door 29 is closed, and the key is inserted to turn the lock. The laser rangefinder 27 is securely mounted on the support plate 24 with screws. Both the laser emitting end and the laser receiving end of the laser rangefinder 27 correspond to the clearance groove 25. The position and shape of the clearance groove 25 ensure that laser emission and reception are not obstructed. After adjusting the position of the laser rangefinder 27, the operation... The panel displays the measurement parameters for the laser rangefinder 27. The laser rangefinder 27 is activated and measures the building foundation pit, thus avoiding the problem of measurement accuracy being affected by personal factors during manual handheld measurement. Pressing the start button causes the laser rangefinder 27 to emit a laser for measurement, reading and recording the measurement data. The motor 32 is connected to the operation panel via control circuitry. A partition plate 34 is connected to the inner wall of the adjustment box 31, dividing the interior of the adjustment box 31 into an installation area and a transmission area. The end of the second screw 33 furthest from the motor 32 passes through the partition plate 34 and is rotatably connected to the inner wall of the adjustment box 31 via a bearing. A lighting lamp 38 is installed on the inner bottom side of the front end of the support plate 24. The lighting lamp 38 is a waterproof LED lamp with adjustable brightness. After the motor 32 is started, the motor 32 works and drives the second screw 33 to rotate. With the lighting lamp 38, although the laser rangefinder 27 measures distance by emitting and receiving laser pulses, its working principle is based on the propagation speed and reflection time of the laser, rather than relying on visible light to identify targets. In the dark environment of the construction pit, the laser can still be emitted and reflected normally, and the laser rangefinder 27 can measure the distance. However, when there are obstacles in the construction pit, it will affect the laser. When the reflection effect causes inaccurate measurements, the lighting lamp 38 can help operators better observe the internal conditions of the building foundation pit in order to select a suitable measurement point. The adjusting block 36 is threadedly rotatably connected to the second screw 33. The internal thread of the adjusting block 36 is engaged with the external thread of the second screw 33. Two smooth-surfaced limiting rods 35 are provided on the inner side of the adjusting box 31. The two limiting rods 35 are symmetrically arranged at the upper and lower ends of the second screw 33. One end of the limiting rod 35 is connected to the inner wall of the adjusting box 31, and the end of the limiting rod 35 away from the inner wall of the adjusting box 31 is connected to the partition plate 34. The limiting rod 35 is slidably connected to the adjusting block 36.When the motor 32 is started, the adjusting block 36 moves linearly under the action of the second screw 33 and the limiting rod 35. This movement of the adjusting block 36 is used to adjust the position of the laser rangefinder 27. The adjusting box 31 is installed on top of the measuring box 21 and is connected to the measuring box 21 by bolts. A smooth inner adjusting groove 28 is provided on the inner side of the wall connecting the adjusting box 31 and the measuring box 21. The end of the linkage plate 37 away from the adjusting block 36 passes through the adjusting groove 28 and extends to connect with the support plate 24. When the motor 32 is started, the adjusting block 36 moves, driving the linkage plate 37. The linkage plate 37 pushes the support plate 24 horizontally within the measuring box 21. The movement of the support plate 24 is observed to ensure that the laser rangefinder 27 accurately reaches the measuring position.

[0036] The working principle of this utility model is as follows: Push the frame assembly 1 to the predetermined measurement position at the edge of the pit. Utilize the universal wheels with double locking function at the lower end of the frame base 11, first unlock the wheels and move them to the appropriate location, then lock the rotation and steering of the wheels respectively to confirm that the frame base 11 is level. If not level, adjust it subsequently using the first screw 15. Simultaneously, inside the toolbox 17, according to the type of tool, use adjustable partitions to divide the area and store auxiliary tools such as measuring tapes and levels. After the frame assembly 1 is in place, each set of mounting side plates 13, symmetrically distributed about the central axis of the frame base 11, begins to function. Hold each first screw 15 with both hands and slowly rotate clockwise. The first screw 15, in thread engagement with the sleeve 14, drives the bottom... The positioning cover 16, with its anti-slip planar structure, is gradually lowered vertically until it is in close contact with the ground. Then, the locking nut 12 is tightened with a wrench to secure the first screw 15 and prevent it from loosening, thus ensuring the stability of the entire measuring tool during subsequent measurements. The protective door 29, which is hinged to the opening of the measuring box 21, is opened. The rotation direction and speed of the motor 32 are set on the control panel via the control circuit. The motor start button is pressed, and the motor 32 begins to work. Its output end drives the second screw 33 to rotate via a coupling. After the motor 32 starts, the adjusting block 36, under the threaded rotational engagement with the second screw 33 and the guidance of the two symmetrically arranged limit rods 35, moves, driving the lower end of the coupling... The moving plate 37, which passes through the smooth adjusting groove 28 on the inner side of the connecting wall between the adjusting box 31 and the measuring box 21, pushes the bearing plate 24 to move horizontally within the measuring box 21. During this process, the movement of the bearing plate 24 is continuously observed to ensure that the laser rangefinder 27 installed on it accurately reaches the predetermined measurement position, so as to realize the measurement of different points in the building foundation pit. If the light inside the building foundation pit is dim or there are obstacles that affect laser reflection, the waterproof and brightness-adjustable LED light 38 installed on the inner side of the bottom front of the bearing plate 24 can be turned on. The brightness can be adjusted according to the actual situation to better observe the inside of the foundation pit, select a suitable measurement point, and after adjustment, press the start button. The laser rangefinder 27 emits a laser to measure the building foundation pit. After measurement, read and record the measurement data. Then, smoothly push the laser rangefinder 27 into the sliding groove 23 on the inner wall of the support groove 22, ensuring that the sliding rod 26 connected to the outer wall of the support plate 24 is fully inserted into the sliding groove 23. The laser rangefinder 27 is securely installed on the support plate 24 with screws, and its laser emitting end and receiving end correspond to the clearance groove 25 on the inner side of the support plate 24 to ensure that laser emission and reception are not obstructed. After placement, close the protective door 29, insert the key and turn the lock. At the same time, since a sealing strip is set between the protective door 29 and the measuring box 21, dust and moisture are prevented from entering, protecting the laser rangefinder 27 inside. The laser rangefinder 27 is model iLDM-150, with a measuring range of 0.05-70 meters and an accuracy of ±1.It features a 5mm diameter, built-in Bluetooth and wireless transmission for data measurement, transmission, analysis, and cloud storage. It has an IP54 protection rating and a 27mm laser rangefinder for distance measurement. The underlying principles of this structure are publicly available technology, and all components are standard parts or known to those skilled in the art. Its structure and principles can be understood by those skilled in the art through technical manuals or conventional experimental methods.

[0037] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A measuring tool, comprising a frame assembly (1), a measuring component (2), and an adjusting component (3), wherein the frame assembly (1) includes a frame base (11) and a toolbox (17), the measuring component (2) includes a measuring box (21) and a laser rangefinder (27), and the adjusting component (3) includes an adjusting box (31), characterized in that: The frame base (11) is welded with a mounting side plate (13). A sleeve (14) is provided on the inner side of the mounting side plate (13). A first screw (15) is provided on the inner side of the sleeve (14). The first screw (15) and the sleeve (14) are connected by a thread to achieve rotation and lifting. A bearing groove (22) is provided on the inner side of the measuring box (21). A straight sliding groove (23) is provided on the inner wall of the bearing groove (22). A bearing plate (24) is provided on the inner side of the measuring box (21). The outer wall of the bearing plate (24) is connected to a sliding rod (26), the inner side of the bearing plate (24) is provided with a clearance groove (25), the top wall of the measuring box (21) is provided with an adjustment groove (28), the inner side of the adjustment box (31) is provided with a motor (32), the output end of the motor (32) is connected to a second screw (33) through a coupling, the outer ring of the second screw (33) is provided with an adjustment block (36), and the lower end of the adjustment block (36) is connected to a linkage plate (37).

2. A measuring tool according to claim 1, characterized in that: The lower end of the frame base (11) is connected to a universal wheel with double locking function, and the top of the frame base (11) is connected to a toolbox (17). The measuring box (21) is installed on the top of the toolbox (17), and the toolbox (17) is provided with an adjustable partition.

3. A measuring tool according to claim 1, characterized in that: The mounting side plates (13) are arranged in pairs, and each pair of mounting side plates (13) is symmetrically distributed about the central axis of the frame base (11). The inner wall of the sleeve (14) is provided with internal threads. The first screw (15) is rotatably connected to the sleeve (14) by threads. The outer ring of the first screw (15) is rotatably connected to a locking nut (12). The lower end of the first screw (15) is connected to a positioning cover (16) with a bottom anti-slip flat structure.

4. A measuring tool according to claim 1, characterized in that: The inner wall of the bearing groove (22) is provided with a sliding groove (23) that matches the size of the sliding rod (26). The opening end of the measuring box (21) is connected to a protective door (29) by a hinge. The protective door (29) and the measuring box (21) are provided with matching locks. A sealing strip is provided between the protective door (29) and the measuring box (21).

5. A measuring tool according to claim 1, characterized in that: The laser rangefinder (27) is securely mounted on the support plate (24) by screws. The laser emitting end and the laser receiving end of the laser rangefinder (27) are both equipped with relief grooves (25). The position and shape of the relief grooves (25) ensure that the laser emission and reception are not obstructed.

6. A measuring tool according to claim 1, characterized in that: The motor (32) is connected to the operation panel via a control line. The inner wall of the regulating box (31) is connected to a partition plate (34), which divides the interior of the regulating box (31) into an installation area and a transmission area. The end of the second screw (33) away from the motor (32) passes through the partition plate (34) and is rotatably connected to the inner wall of the regulating box (31) via a bearing. A lighting lamp (38) is installed on the bottom inner side of the front end of the bearing plate (24). The lighting lamp (38) is a waterproof LED lamp with adjustable brightness.

7. A measuring tool according to claim 1, characterized in that: The adjusting block (36) is rotatably connected to the second screw (33) by a thread. The internal thread of the adjusting block (36) is engaged with the external thread of the second screw (33). Two smooth-surfaced limiting rods (35) are provided on the inner side of the adjusting box (31). The two limiting rods (35) are symmetrically arranged at the upper and lower ends of the second screw (33). One end of the limiting rod (35) is connected to the inner wall of the adjusting box (31), and the end of the limiting rod (35) away from the inner wall of the adjusting box (31) is connected to the partition plate (34). The limiting rod (35) is slidably connected to the adjusting block (36).

8. A measuring tool according to claim 1, characterized in that: The adjustment box (31) is installed on the top of the measuring box (21). The adjustment box (31) and the measuring box (21) are connected by bolts. The inner side of the wall connecting the adjustment box (31) and the measuring box (21) is provided with an adjustment groove (28) with a smooth inner wall. The end of the linkage plate (37) away from the adjustment block (36) passes through the adjustment groove (28) and extends to connect with the bearing plate (24).

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