A leveling mechanism for detecting a level meter

Abstract

The present application relates to the technical field of laser level adjustment, and the leveling mechanism for level detection, which comprises a main support, a fixing frame is installed on the main support, a receiving grating is fixedly installed on the fixing frame, a protective sleeve is sleeved with the receiving end of the receiving grating, a cleaning assembly is arranged on the main support, a center table is fixedly installed between the main supports, a control module is arranged in the center table, and a three-axis driving assembly is arranged on the center table; before measurement, the cleaning assembly is used to remove floating dust attached to the receiving grating and the protective sleeve, so that the adjustment accuracy of the equipment is ensured; in the cleaning process, suction and filtration are used to prevent the floating dust generated in the cleaning process from being suspended in the air and affecting the irradiation path of the laser; when measuring for the first time, a point recording module is used to mark the test point; in the subsequent measurement process, the positioning cylinder is used for accurate resetting of the measurement point, so that the repeated accuracy of the equipment test is ensured, and the test efficiency of repeated detection is improved.

Description

Technical Field

[0001] This invention belongs to the field of laser level adjustment technology, specifically relating to a leveling mechanism for level testing. Background Technology

[0002] A laser level is an electronic tool that uses a laser beam and a precision optical system to project accurate horizontal lines, vertical lines, or points. It is a commonly used measuring device in related fields, replacing traditional bubble levels and achieving high-efficiency, high-precision, and long-distance measurement. It is a core tool in industries such as construction, decoration, and installation. Essentially, a laser level is a reference generator. Therefore, to ensure that the reference provided by the laser level is not skewed, calibration and testing using leveling equipment are required. However, existing leveling mechanisms require deviation detection of laser points in multiple directions, necessitating multiple adjustments to the laser's position during testing. Each adjustment requires manual operation, relying on the operator's experience and impacting the level's calibration efficiency. Therefore, designing a leveling mechanism for level testing is essential. Summary of the Invention

[0003] The purpose of this invention is to provide a leveling mechanism for leveling instruments that is simple in structure and reasonably designed in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] A leveling mechanism for leveling instruments includes a main support, a fixed frame mounted on the main support, a receiving grating fixedly mounted on the fixed frame, a protective sleeve fitted to the receiving end of the receiving grating, a cleaning assembly on the main support, a central platform fixedly mounted between the main supports, a control module in the central platform, a three-axis drive assembly on the central platform, a clamping platform mounted on the three-axis drive assembly, a support plate on the top of the clamping platform, and a point recording module on the clamping platform.

[0006] The cleaning assembly includes an electric slide rail mounted on a main support. A sliding housing is fixed to an electric slider in the electric slide rail. A lifting screw is rotatably connected to the sliding housing. A lifting block is mounted on the lifting screw. The lifting block is fixedly connected to a side slider. The side slider is slidably connected to a guide rail mounted on one side of the sliding housing. A cleaning docking assembly is fixedly mounted on the side slider.

[0007] The point recording module includes a fixed ring mounted on a three-axis drive assembly. A positioning slide is slidably connected between the fixed ring and the clamping table. A positioning cylinder is fixedly mounted on the top of the positioning slide, and a positioning block is fixedly connected to the output end of the positioning cylinder. A locking structure is provided on the positioning slide.

[0008] As a further optimization of the present invention, the bottom of the sliding housing is slidably connected to the guide rail on the lower support, the lower support is fixed on the main support, a lifting motor is fixedly installed in the sliding housing, and the output end of the lifting motor is fixedly connected to the bottom end of the lifting screw.

[0009] As a further optimization of the present invention, the cleaning docking assembly includes a flip motor fixed on the side slider, the output end of the flip motor is fixedly connected to a mounting plate, an adjusting cylinder is fixed on the mounting plate, the output end of the adjusting cylinder is fixedly connected to a mounting plate, a cleaning motor is fixed on one side of the mounting plate, and the cleaning motor is fixed on the connecting cover.

[0010] As a further optimization of the present invention, a cleaning disc is rotatably connected in the connecting cover, the cleaning disc is fixedly connected to the output end of the cleaning motor, cleaning support blocks are evenly arranged on the cleaning disc, cleaning brushes are evenly arranged on the cleaning support blocks, a pressure plate is slidably connected between the cleaning support blocks, a spring is provided on the pressure plate, one end of the spring is fixed on the cleaning disc, and the end of the pressure plate away from the spring is covered with non-woven fabric.

[0011] As a further optimization of the present invention, an air pump is fixedly installed on one side of the cleaning motor. The input end of the air pump is connected to the inside of the connecting cover through a pipe, and the output end of the air pump is provided with a connecting pipe. The connecting pipe is connected to the filter shell, and the filter shell is fixed to the cleaning motor.

[0012] As a further optimization of the present invention, the three-axis drive assembly includes a lower frame fixed on a central platform, a first lead screw rotatably connected in the lower frame, a first rocker arm provided at one end of the first lead screw, a first slide table provided on the first lead screw, and the first slide table slidably connected to the lower frame.

[0013] As a further optimization of the present invention, a second lead screw is rotatably connected to the first slide, a second rocker is provided at one end of the second lead screw, a second slide is provided on the second lead screw, and the second slide is slidably connected to the upper frame, and a fixing ring is fixedly connected to the second slide.

[0014] As a further optimization of the present invention, a rotary motor is fixedly installed in the groove opened on the top of the second slide table. The output end of the rotary motor is fixedly connected to the bottom of the clamping table, and the clamping table is rotatably connected to the second slide table. Positioning slots are symmetrically opened on the side wall of the clamping table.

[0015] As a further optimization of the present invention, the locking structure includes an inner locking cylinder fixed on one side of the top of the positioning slide, and an outer locking cylinder provided on the other side of the top of the positioning slide. The output ends of both the inner locking cylinder and the outer locking cylinder are fixedly connected to a locking frame.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention utilizes an electric slide rail to adjust the position of the sliding housing, while a lifting motor drives a lifting screw to rotate. During the rotation of the lifting screw, it works in conjunction with a lifting block to move the lifting block and side slider upwards, thereby adjusting the height of the cleaning docking assembly. Subsequently, a flip motor adjusts the angle of the output end of the adjusting cylinder, and the adjusting cylinder presses the cleaning disc onto the protective sleeve. Then, the cleaning motor rotates, and during the rotation, the cleaning brush on the cleaning support block removes floating dust, while the non-woven cloth on the pressure plate wipes the surface, preventing scratches on the transparent lens and ensuring the equipment's adjustment accuracy.

[0018] During the cleaning process of this invention, the air pump connected to the connecting cover draws the floating dust into the filter shell, and finally the dust is adsorbed by the filter shell, preventing the floating dust generated during cleaning from being suspended in the air and affecting the laser irradiation path.

[0019] During the initial measurement, the invention uses a rotary motor to rotate the clamping platform, adjusting the deflection angle of the laser level. This ensures the laser emitted by the level passes through the photosensitive surface of the receiving grating. Subsequent manual fine-tuning then directs the laser beam to the center of the grating's photosensitive surface. During adjustment, a semi-elliptical positioning block, under the action of a positioning cylinder, presses into a positioning slot on the side wall of the clamping platform. At this time, four positioning slides rotate with the clamping platform. After the initial positioning is complete, the positioning cylinder retracts the positioning block, and simultaneously, the external locking cylinder moves the locking frame on the output end downwards, pressing it tightly against the fixing ring to secure the positioning slides. In subsequent measurements, the rotary motor rotates the clamping platform, and the positioning cylinder precisely resets the measurement points, ensuring the repeatability of the equipment tests and improving the efficiency of repeated testing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a top view of the structure of the present invention;

[0022] Figure 3 This is a three-dimensional diagram of a partial structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the three-axis drive assembly in this invention;

[0024] Figure 5This is a schematic diagram of the point recording module in this invention;

[0025] Figure 6 This is a schematic diagram of the cleaning component in this invention;

[0026] Figure 7 yes Figure 6 A magnified view of a portion of region A in the middle.

[0027] In the diagram: 1. Main support; 2. Fixing frame; 3. Receiving grating; 4. Protective sleeve; 5. Cleaning assembly; 6. Center platform; 7. Three-axis drive assembly; 8. Point recording module; 9. Clamping table; 10. Support plate; 51. Electric slide rail; 52. Sliding housing; 53. Lower support; 54. Lifting screw; 55. Lifting motor; 56. Lifting block; 57. Side slider; 58. Tilting motor; 59. Adjusting cylinder; 60. Cleaning motor; 61. Air pump; 62. Connecting cover; 63. Cleaning tray; 6 4. Cleaning brush; 65. Pressure plate; 66. Spring; 67. Non-woven fabric; 68. Connecting pipe; 69. Filter shell; 71. Lower frame; 72. First lead screw; 73. First slide; 74. First rocker arm; 75. Upper frame; 76. Second lead screw; 77. Second slide; 78. Second rocker arm; 79. Rotary motor; 80. Positioning slot; 81. Fixing ring; 82. Positioning slide; 83. Inner locking cylinder; 84. Outer locking cylinder; 85. Locking frame; 86. Positioning cylinder; 87. Positioning block. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] Example: Please refer to Figures 1-7A leveling mechanism for a spirit level includes a main support 1, on which a fixing frame 2 is mounted. The main support 1 consists of two sets of mutually perpendicular brackets. The fixing frame 2 is fixed to the main support 1 by bolts and is used to mount a receiving grating 3. A protective sleeve 4 is fitted onto the receiving end of the receiving grating 3. The protective sleeve 4 consists of a rubber sleeve and a transparent lens. The rubber sleeve supports the transparent lens on the photosensitive surface of the receiving grating 3. A laser beam passes through the transparent lens and directly irradiates the photosensitive surface of the receiving grating 3. A cleaning component 5 is provided on the main support 1 for removing impurities adhering to the transparent lens. A central platform 6 is fixedly installed between the main supports 1. A control module is provided in the central platform 6. After the photosensitive surface of the receiving grating 3 receives light, it feeds back the position data of the irradiated point to the control module. In this block, the control module compares the position changes of different receiving gratings 3. When the drift of the irradiated point is detected, the level of the laser is adjusted by adjusting the fine adjustment knob on the laser level. A three-axis drive assembly 7 is set on the central platform 6, and a clamping platform 9 is installed on the three-axis drive assembly 7. A support plate 10 is set on the top of the clamping platform 9, and a point recording module 8 is set on the clamping platform 9. The support plate 10 is used to fix the laser level that needs to be adjusted. The point recording module 8 marks the measurement point when the level deflection angle is adjusted for the first time. During the repeated test, the position is coarsely adjusted by the three-axis drive assembly 7, and then precisely reset by the point recording module 8, which ensures the repeatability accuracy of the equipment test and improves the test efficiency of repeated detection.

[0030] Please see Figure 3 and Figures 6-7The cleaning component 5 includes an electric slide rail 51 symmetrically arranged on the main support 1. The electric slide rail 51 is existing technology. A sliding housing 52 is fixed to an electric slider in the electric slide rail 51. A lifting screw 54 is rotatably connected to the sliding housing 52. A lifting block 56 is provided on the lifting screw 54. The lifting block 56 is fixedly connected to a side slider 57. The side slider 57 is slidably connected to a guide rail symmetrically arranged on one side of the sliding housing 52. A cleaning docking component is fixedly installed on the side slider 57. The bottom of the sliding housing 52 is slidably connected to a guide rail on the lower support 53. The electric slide rail 51 can drive the sliding housing 52 to slide along the guide rail on the lower support 53. The lower support 53 is fixed to the main support 1. A lifting motor 55 is fixedly installed in the groove on the side. The output end of the lifting motor 55 is fixedly connected to the bottom end of the lifting screw 54. The cleaning docking assembly includes a tilting motor 58 fixed on the side slider 57. The output end of the tilting motor 58 is fixedly connected to a mounting plate. An adjusting cylinder 59 is fixed in the groove on the mounting plate. The output end of the adjusting cylinder 59 is fixedly connected to a mounting plate. A cleaning motor 60 is fixedly installed on one side of the mounting plate. The cleaning motor 60 is fixedly connected to a cover 62. The side of the cover 62 away from the cleaning motor 60 is open. A cleaning disc 63 is rotatably connected to the cover 62. The cleaning disc 63 is fixedly connected to the output end of the cleaning motor 60. Cleaning supports are evenly arranged on the cleaning disc 63. Cleaning brushes 64 are evenly distributed on the blocks. Pressure plates 65 are slidably connected between the cleaning blocks. Pressure plates 65 are connected to the cleaning disc 63 via springs 66. The end of the pressure plate 65 away from the springs 66 is covered with non-woven fabric 67. An air pump 61 is fixedly installed on one side of the cleaning motor 60. The input end of the air pump 61 is connected to the interior of the connecting cover 62 via a pipe, and the output end of the air pump 61 is provided with a connecting pipe 68, which is connected to the filter housing 69. The filter housing 69 is fixed to the cleaning motor 60. When cleaning the protective sleeve 4 on the receiving grating 3, the position of the sliding housing 52 is adjusted using the electric slide rail 51. Simultaneously, the lifting motor 55 drives the lifting screw 54 to rotate. During the process, the lifting block 56 and the side slider 57 are moved up and down to adjust the height of the cleaning docking component by cooperating with the lifting block 56. Then, the angle of the output end of the adjusting cylinder 59 is adjusted by the flipping motor 58, and the cleaning disc 63 is pressed onto the protective sleeve 4 by the adjusting cylinder 59. After that, the cleaning motor 60 rotates. During the rotation, the cleaning brush 64 on the cleaning support block removes the floating dust. At the same time, the non-woven cloth 67 on the pressure plate 65 is used to wipe the lens to avoid scratches. During the cleaning process, the air pump 61 connected to the connecting cover 62 draws the floating dust into the filter shell 69. Finally, the filter shell 69 adsorbs the dust to prevent the floating dust generated during cleaning from being suspended in the air and affecting the laser irradiation path.

[0031] Please see Figures 4-5The three-axis drive assembly 7 includes a lower frame 71 fixed on a central platform 6. A first lead screw 72 is rotatably connected to the lower frame 71 via bearings. A first rocker arm 74 is provided at one end of the first lead screw 72, which can drive the first lead screw 72 to rotate. A first slide 73 is provided on the first lead screw 72. The first slide 73 is connected to the first lead screw 72 through an internally embedded ball nut. The first slide 73 is slidably connected to the lower frame 71. A second lead screw 76 is rotatably connected to the first slide 73 via bearings. One end of the second lead screw 76... A second rocker arm 78 is provided to drive the second lead screw 76 to rotate. A second slide 77 is provided on the second lead screw 76. The second slide 77 cooperates with the second lead screw 76 through an internally embedded ball nut. The second slide 77 is slidably connected to the upper frame 75. A rotary motor 79 is fixedly installed in a groove opened at the top of the second slide 77. The output end of the rotary motor 79 is fixedly connected to the bottom of the clamping table 9. The clamping table 9 is rotatably connected to the circular slot at the top of the second slide 77. Four sets of positioning slots 80 are symmetrically opened on the side wall of the clamping table 9.

[0032] Please see Figures 4-5The point recording module 8 includes a fixing ring 81 fixed to the top of the second slide 77. A positioning slide 82 is slidably connected between the fixing ring 81 and the clamping table 9. A positioning cylinder 86 is fixedly installed in a fixed frame set on the top of the positioning slide 82, and a semi-elliptical positioning block 87 is fixedly connected to the output end of the positioning cylinder 86. An inner locking cylinder 83 is embedded in a groove on the top of the positioning slide 82 near the clamping table 9, and an outer locking cylinder 84 is embedded in a groove on the top of the positioning slide 82 near the fixing ring 81. Locking frames 85 are fixedly connected to the output ends of both the inner locking cylinder 83 and the outer locking cylinder 84. During the first measurement, the rotation of the clamping table 9 is driven by the rotary motor 79 to adjust the deflection angle of the laser level, so that the laser emitted by the laser level to be adjusted can pass through the photosensitive surface of the receiving grating 3. Then, manual fine-tuning is used to make the laser irradiate the center of the photosensitive surface of the receiving grating 3. During the adjustment process, the semi-elliptical positioning block 87 acts as a positioning cylinder 86. The positioning slides 82 are pressed into the positioning slots 80 on the side wall of the clamping table 9. At this time, the four sets of positioning slides 82 can rotate with the clamping table 9. After the first positioning is completed, the positioning cylinder 86 drives the positioning block 87 to retract. At the same time, the outer locking cylinder 84 drives the locking frame 85 on the output end to move down. The locking frame 85 presses tightly on the fixing ring 81 to fix the position of the positioning slides 82. In the subsequent test, the control module drives the rotary motor 79 to rotate the clamping table 9 by 90 degrees, so that the laser level is facing the next set of receiving gratings 3. Then, the positioning cylinder 86 drives the positioning block 87 to extend. The four sets of semi-elliptical positioning blocks 87 are pressed into the positioning slots 80 in four directions to fine-tune the rotation position of the clamping table 9. After the positioning block 87 is fully embedded in the positioning slot 80, the inner locking cylinder 83 drives the locking frame 85 to move down. The locking frame 85 presses tightly on the clamping table 9 to lock the position of the clamping table 9 for a second time to prevent the clamping table 9 from tilting during the debugging process. Then, the operation is repeated to complete the debugging work in four directions.

[0033] It should be noted that, in use, this leveling mechanism for leveling instruments first fixes the laser level to be adjusted onto the support plate 10. The first rocker arm 74 drives the first lead screw 72 to rotate, adjusting the position of the first slide 73. Then, the second rocker arm 78 drives the second lead screw 76 to rotate, adjusting the position of the second slide 77, so that the laser level is positioned at the center of the receiving grating 3. Next, the electric slide rail 51 adjusts the position of the sliding housing 52. Simultaneously, the lifting motor 55 drives the lifting lead screw 54 to rotate. During the rotation of the lifting lead screw 54, it cooperates with the lifting block 56 to move the lifting block 56 and the side slider 57 upwards, adjusting the height of the cleaning docking assembly. Finally, the tilting motor 58 adjusts the angle of the output end of the adjusting cylinder 59. The cleaning disc 63 is pressed onto the protective sleeve 4 by the adjusting cylinder 59. Then, the cleaning motor 60 rotates, and during the rotation, the cleaning brush 64 on the cleaning support block removes the floating dust. At the same time, the non-woven cloth 67 on the pressure plate 65 wipes the lens to prevent scratches. During the cleaning process, the air pump 61 connected to the connecting cover 62 draws the floating dust into the filter shell 69. Finally, the filter shell 69 adsorbs the dust to prevent the floating dust generated during cleaning from being suspended in the air and affecting the laser irradiation path. After cleaning, the initial positioning is performed. During positioning, the rotation motor 79 drives the clamping table 9 to rotate to adjust the deflection angle of the laser level, so that the laser emitted by the laser level to be adjusted can pass through the photosensitive surface of the receiving grating 3. Then, the laser is finely adjusted manually. Illumination is directed at the center of the photosensitive surface of the receiving grating 3. During adjustment, the semi-elliptical positioning block 87 is pressed into the positioning slot 80 on the side wall of the clamping table 9 by the positioning cylinder 86. At this time, the four sets of positioning slides 82 can rotate with the clamping table 9. After the first positioning is completed, the positioning cylinder 86 drives the positioning block 87 to retract, and at the same time, the external locking cylinder 84 drives the locking frame 85 on the output end to move down. The locking frame 85 presses tightly against the fixing ring 81 to fix the position of the positioning slide 82. In subsequent tests, the control module drives the rotary motor 79 to rotate the clamping table 9 by 90 degrees, so that the laser level is oriented towards the next set of receiving gratings 3. Then, the positioning cylinder 86 drives the positioning block 87 to extend, and the four sets of semi-elliptical positioning blocks 87 press in four directions. The positioning slot 80 is inserted into the positioning slot 80, and the rotation position of the clamping table 9 is finely adjusted. After the positioning block 87 is fully embedded in the positioning slot 80, it is ensured that the clamping table 9 can be precisely rotated by 90 degrees, ensuring that the rotation amount is consistent in each adjustment, thereby improving the efficiency and accuracy of the adjustment. The internal locking cylinder 83 drives the locking frame 85 to move down, and the locking frame 85 presses tightly on the clamping table 9 to lock the position of the clamping table 9 for a second time, preventing the clamping table 9 from tilting during the adjustment process. The operation is repeated. After each angle change, the photosensitive surface of the receiving grating 3 receives light and feeds back the position data of the irradiation point to the control module. Then, the control module compares the position changes of different receiving gratings 3. When the drift of the irradiation point is detected, the laser level is adjusted by adjusting the fine adjustment knob on the laser level.

[0034] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A leveling mechanism for a spirit level, comprising a main support, characterized in that: A fixing frame is installed on the main support, and a receiving grating is fixedly installed on the fixing frame. The receiving end of the receiving grating is fitted with a protective sleeve. A cleaning component is provided on the main support. A central platform is fixedly installed between the main supports. A control module is provided in the central platform. A three-axis drive component is provided on the central platform, and a clamping platform is installed on the three-axis drive component. A support plate is provided on the top of the clamping platform. A point recording module is provided on the clamping platform. Positioning slots are symmetrically opened on the side wall of the clamping platform. The cleaning assembly includes an electric slide rail mounted on a main support. A sliding housing is fixed to an electric slider in the electric slide rail. A lifting screw is rotatably connected to the sliding housing. A lifting block is mounted on the lifting screw. The lifting block is fixedly connected to a side slider. The side slider is slidably connected to a guide rail on one side of the sliding housing. A cleaning docking assembly is fixedly installed on the side slider. The bottom of the sliding housing is slidably connected to a guide rail on a lower support. The lower support is fixed to the main support. A lifting motor is fixedly installed in the sliding housing, and the output end of the lifting motor is fixedly connected to the bottom end of the lifting screw. The point recording module includes a fixed ring mounted on a three-axis drive assembly. A positioning slide is slidably connected between the fixed ring and the clamping table. A positioning cylinder is fixedly mounted on the top of the positioning slide, and a positioning block is fixedly connected to the output end of the positioning cylinder. A locking structure is provided on the positioning slide. The cleaning docking assembly includes a flip motor fixed on a side slider. The output end of the flip motor is fixedly connected to a mounting plate. An adjusting cylinder is fixed on the mounting plate. The output end of the adjusting cylinder is fixedly connected to a mounting plate. A cleaning motor is fixed to one side of the mounting plate. The cleaning motor is fixedly connected to a connecting cover. A cleaning disc is rotatably connected to the connecting cover. The cleaning disc is fixedly connected to the output end of the cleaning motor. Cleaning blocks are evenly arranged on the cleaning disc. Cleaning brushes are evenly arranged on the cleaning blocks. A pressure plate is slidably connected between the cleaning blocks. A spring is provided on the pressure plate. One end of the spring is fixed to the cleaning disc. The end of the pressure plate away from the spring is covered with non-woven fabric. An air pump is fixedly installed on one side of the cleaning motor. The input end of the air pump is connected to the inside of the connecting cover via a pipe. The output end of the air pump is provided with a connecting pipe, which is connected to a filter housing. The filter housing is fixed to the cleaning motor.

2. The leveling mechanism for a spirit level as described in claim 1, characterized in that: The three-axis drive assembly includes a lower frame fixed on a central platform, a first lead screw rotatably connected to the lower frame, a first rocker arm at one end of the first lead screw, a first slide on the first lead screw, and the first slide slidably connected to the lower frame.

3. The leveling mechanism for a spirit level as described in claim 2, characterized in that: The first slide is rotatably connected to a second lead screw, one end of which is provided with a second rocker arm. The second slide is provided on the second lead screw and is slidably connected to the upper frame. The second slide is fixedly connected to a fixing ring.

4. The leveling mechanism for a spirit level as described in claim 3, characterized in that: A rotary motor is fixedly installed in a groove on the top of the second slide. The output end of the rotary motor is fixedly connected to the bottom of the clamping table, and the clamping table is rotatably connected to the second slide.

5. A leveling mechanism for leveling instruments according to claim 1, characterized in that: The locking structure includes an inner locking cylinder fixed to one side of the top of the positioning slide, and an outer locking cylinder provided on the other side of the top of the positioning slide. The output ends of both the inner and outer locking cylinders are fixedly connected to locking frames.

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