Photoelectric measuring instrument convenient to level

Abstract

The invention relates to the field of photoelectric instruments, in particular to a leveling device for a photoelectric measuring instrument, which comprises a photoelectric measurer and a total station leveler, a level bubble instrument is arranged at the top of the photoelectric measurer, and the photoelectric measurer is mounted on the total station leveler; according to the leveling device disclosed by the invention, through the adjustment matching of an adjusting cam and a clamping cam which are arranged in the leveling assembly, the horizontal state of the photoelectric measurer and the total station leveling device after being placed is finely adjusted, the adjustment amplitude is fine, and further slight adjustment can be carried out in a state of being matched with the positioning assembly to roughly perform horizontal positioning, so that the adjustment fineness is improved; compared with a traditional air rod and manual rotation adjustment mode, the precision of horizontal adjustment is greatly improved, so that the measurement accuracy is improved, and the problems that the fine adjustment function is insufficient after preliminary positioning in the traditional mode, further fine and accurate adjustment is difficult to achieve after rough positioning, and the measurement precision is poor are solved. And the improvement of the adaptability and the measurement precision of the equipment in a complex measurement environment is limited.

Description

Technical Field

[0001] The invention relates to the field of photoelectric instruments, and in particular to a photoelectric measuring instrument which is convenient for leveling. Background Art

[0002] A leveling device for a photoelectric measuring instrument with application number CN202222004807.5 relates to the technical field of leveling devices, including a support frame, an upper surface of the support frame is fixedly connected with a mounting frame, a through slot is provided in the mounting frame, a photoelectric measuring instrument body is arranged in the through slot, one side of the mounting frame is fixedly connected with an electric telescopic rod, an upper surface of the photoelectric measuring instrument body is fixedly connected with an electric level ruler, an angle adjustment component is arranged in the photoelectric measuring instrument body, and the angle adjustment component includes a servo motor, a connecting shaft, and a slider; when the photoelectric measuring instrument body of the utility model rotates, the electric level ruler is cooperated to realize accurate adjustment of the measuring angle, and the electric telescopic rod can also be started to make the height of the photoelectric measuring instrument body better adapt to the use scenario. Compared with manual adjustment of the transmission, the servo motor is used to cooperate with the electric level ruler for adjustment, and the angle is more precise, which ensures the accuracy of the measurement result and provides convenience for use.

[0003] In the prior art including the above-mentioned patents, traditional photoelectric measuring equipment has many defects in leveling. When adjusting the level, gas rod adjustment or manual rotation adjustment is often used. It is difficult to accurately control the adjustment range of gas rod adjustment, and it is easy to over-adjust or under-adjust, resulting in inaccurate level of the equipment, which in turn affects the accuracy of the measurement results. Manual rotation adjustment relies on the experience and feel of the operator. The adjustment process is cumbersome and the accuracy is limited. The adjustment effects of different operators vary greatly, and it cannot meet the strict requirements of high-precision measurement for levelness. The traditional method lacks the fine-tuning function after preliminary positioning, and it is difficult to achieve further subtle and precise adjustments after rough positioning, which limits the adaptability of the equipment in complex measurement environments and the improvement of measurement accuracy.

[0004] Therefore, it is necessary to invent a photoelectric measuring instrument that is easy to level to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a leveling device for a photoelectric measuring instrument, comprising a photoelectric measuring instrument and a total station leveler, wherein a horizontal bubble meter is provided on the top of the photoelectric measuring instrument, the photoelectric measuring instrument is mounted on the total station leveler, the photoelectric measuring instrument comprises a protective cover, a positioning assembly is slidably connected to the inner side of the protective cover, one end of the positioning assembly is connected to a first micro motor, a fixing plate is provided on the top of the protective cover, one end of the fixing plate is hinged to a measuring instrument body, positioning rods cooperating with the positioning assembly are provided on both sides of the measuring instrument body, a plurality of leveling assemblies are detachably mounted on one side of the protective cover, and the leveling assembly is electrically connected to the first micro motor; The total station leveler includes a cylinder, one end of which is provided with a supporting platform, the top of the supporting platform is provided with a plurality of mounting frames that cooperate with the leveling assembly, the mounting frames are provided with anti-slip grooves, the bottom of the supporting platform is provided with a plurality of driving motors, the power output shafts of the plurality of driving motors are all threadedly connected to a supporting leg, and one end of the supporting leg is provided with a mounting groove that cooperates with the leveling assembly.

[0006] As a preferred solution of the present invention, the positioning assembly includes a movable clamping plate and a fixed clamping plate, the movable clamping plate is slidably connected to the inner bottom wall of the protective cover, the fixed clamping plate is fixedly connected in the protective cover, and two symmetrically arranged screws are provided on the fixed clamping plate, one end of the screw is threadedly connected to the movable clamping plate, and the other end of the screw is connected to the power output shaft of the first micro motor, and the first micro motor is arranged on the protective cover; The plurality of screw rods are connected by belt transmission; The sides of the movable clamping plate and the fixed clamping plate close to each other are both provided with anti-slip sheets matched with the positioning rods.

[0007] As a preferred solution of the present invention, the leveling assembly includes a leveling frame, the top of the leveling frame is provided with a plurality of mounting screw holes, the bottom of the leveling frame is provided with an arc-shaped groove, a hollow rod is rotatably connected in the arc-shaped groove, an adjusting cam is provided on the hollow rod, one end of the adjusting cam is rotatably connected to a barrel rod, the outer side wall of the barrel rod is sleeved with a first roller, a transmission rod is rotatably penetrated by the inner cavity of the barrel rod, one end of the transmission rod is connected to a gear roller, the other end of the transmission rod is connected to a clamping cam, one end of the clamping cam is rotatably connected to a second roller, the clamping cam is provided with an arc-shaped bayonet matched with the mounting frame, and a tooth groove is provided in the arc opening; A third micro motor capable of synchronously driving the two clamping cams to operate is arranged in the regulating cam, and a power output shaft of the third micro motor is connected with a gear plate, and the gear plate is meshed with two gear rollers.

[0008] As a preferred solution of the present invention, a protective shell is provided on one side of the leveling frame, a second micro motor is provided in the protective shell, an output end of the second micro motor is engaged with one end of the hollow rod, and the second micro motor is electrically connected to the first micro motor.

[0009] As a preferred solution of the present invention, a mounting plate is provided at the bottom of the protective cover, a plurality of spring slots cooperating with the leveling frame are provided at the bottom of the mounting plate, a connecting strip cooperating with the spring slots is provided at the top of the leveling frame, and two groups of symmetrically arranged right-angle teeth are provided at the top of the connecting strip.

[0010] As a preferred solution of the present invention, the wire of the input end of the third micro-motor passes through the inner cavity of the hollow rod.

[0011] As a preferred solution of the present invention, the power output shaft of the driving motor is connected with a threaded rod, the threaded rod is threadedly connected to the support leg, one end of the threaded rod is rotatably connected to a limit plate, a plurality of the limit plates are arranged in a circular array on the outer wall of the cylinder, and the limit plate is provided with a sliding groove that slides with the support leg.

[0012] As a preferred solution of the present invention, a mounting plate is provided at one end of the supporting leg, and a screw hole matching the mounting screw hole is provided on the mounting plate.

[0013] In the above technical solution, compared with the prior art, the technical effects and advantages provided by the present invention are as follows: 1. Through the adjustment and coordination of the adjustment cam and the clamping cam set in the leveling component, the horizontal state of the photoelectric measuring device and the total station leveler after placement can be fine-tuned. The adjustment range is subtle, and further slight adjustments can be made when the positioning component is roughly horizontally positioned, thereby improving the fineness of the adjustment; compared with the traditional gas rod and manual rotation adjustment method, the accuracy of the horizontal adjustment is greatly improved, thereby improving the measurement accuracy; 2. Through the detachable installation between the leveling component and the photoelectric measuring device and the total station leveler, the convenient leveling function of the photoelectric measuring device in different scenes is realized, avoiding the inconvenience of using the photoelectric measuring device in different scenes, improving the flexibility of the equipment and the multi-scene use function; 3. Further fine-tuning can be achieved by adjusting the clamping cam, and on this basis, the arc-shaped bayonet and the mounting bracket can be quickly installed to improve the installation convenience between the photoelectric measuring device and the total station leveler. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 The overall three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The overall three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 3 The structure of the photoelectric measuring device of the present invention is shown in FIG. Figure 1 ; Figure 4 The structure of the photoelectric measuring device of the present invention is shown in FIG. Figure 2 ; Figure 5 It is a schematic diagram of the structure of the leveling assembly of the present invention; Figure 6 It is a schematic diagram of the planar cross-sectional structure of the leveling component of the present invention; Figure 7 for Figure 6 The enlarged structural diagram at A in the middle; Figure 8 It is a schematic diagram of the structure of the mounting frame of the present invention; Fig. 9 It is a schematic diagram of the supporting leg structure of the present invention; Fig.10 It is a schematic diagram of the leveling frame structure of the present invention.

[0016] Description of reference numerals: 1. Photoelectric measuring device; 001. First micro motor; 002. Second micro motor; 11. Protective cover; 12. Positioning assembly; 121. Movable clamping plate; 122. Fixed clamping plate; 123. Screw; 13. Measuring instrument body; 14. Positioning rod; 15. Leveling assembly; 151. Leveling frame; 152. Adjusting cam; 153. Transmission rod; 154. Clamping cam; 155. Third micro motor; 552. Gear disc; 2. Total station leveler; 21. Cylinder; 22. Support platform; 23. Mounting frame; 24. Driving motor; 25. Support leg; 26. Limit plate. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] The present invention provides Figure 1-Figure 10A photoelectric measuring instrument for easy leveling shown in the figure comprises a photoelectric measuring device 1 and a total station leveler 2, a level bubble meter is provided on the top of the photoelectric measuring device 1, the photoelectric measuring device 1 is installed on the total station leveler 2, the photoelectric measuring device 1 comprises a protective cover 11, a positioning assembly 12 is slidably connected to the inner side of the protective cover 11, one end of the positioning assembly 12 is connected to a first micro motor 001, a fixing plate is provided on the top of the protective cover 11, one end of the fixing plate is hinged with a measuring instrument body 13, both sides of the measuring instrument body 13 are provided with positioning rods 14 cooperating with the positioning assembly 12, a plurality of leveling assemblies 15 are detachably installed on one side of the protective cover 11, and the leveling assembly 15 is electrically connected to the first micro motor 001; The total station leveler 2 includes a cylinder 21, one end of which is provided with a supporting platform 22, the top of the supporting platform 22 is provided with a plurality of mounting frames 23 that cooperate with the leveling component 15, the mounting frames 23 are provided with anti-slip grooves, and the bottom of the supporting platform 22 is provided with a plurality of driving motors 24, the power output shafts of the plurality of driving motors 24 are all threadedly connected with supporting legs 25, and one end of the supporting legs 25 is provided with a mounting groove that cooperates with the leveling component 15; this overall structural design combines the photoelectric measuring device 1 with the total station leveler 2, which can not only utilize the measuring function of the photoelectric measuring device 1 itself, but also make use of the stable support and leveling foundation of the total station leveler 2, and the two work together and can be applied to a variety of complex measuring environments, greatly improving the flexibility and adaptability of the measuring operation, and at the same time, the components are interrelated and coordinated with each other, which is convenient for operation and maintenance, and effectively improves the work efficiency and measurement accuracy.

[0019] Further, the positioning assembly 12 includes a movable clamping plate 121 and a fixed clamping plate 122, the movable clamping plate 121 is slidably connected to the inner bottom wall of the protective cover 11, the fixed clamping plate 122 is fixedly connected in the protective cover 11, and two symmetrically arranged screws 123 are provided on the fixed clamping plate 122, one end of the screw 123 is threadedly connected to the movable clamping plate 121, and the other end of the screw 123 is connected to the power output shaft of the first micro motor 001, and the first micro motor 001 is provided on the protective cover 11; The multiple screw rods 123 are connected by belt transmission; The movable clamping plate 121 and the fixed clamping plate 122 are close to each other on one side and are provided with anti-slip sheets that cooperate with the positioning rod 14. Through such a positioning component 12 design, the measuring instrument body 13 can be accurately positioned during the leveling process, effectively preventing the measuring instrument body 13 from displacement deviation and ensuring the accuracy of the measurement.

[0020] Furthermore, the leveling assembly 15 includes a leveling frame 151, a plurality of mounting screw holes are provided on the top of the leveling frame 151, an arc-shaped groove is provided on the bottom of the leveling frame 151, a hollow rod is rotatably connected in the arc-shaped groove, an adjusting cam 152 is provided on the hollow rod, one end of the adjusting cam 152 is rotatably connected to a barrel rod, a first roller is sleeved on the outer side wall of the barrel rod, a transmission rod 153 is rotatably passed through the inner cavity of the barrel rod, one end of the transmission rod 153 is connected to a gear roller, the other end of the transmission rod 153 is connected to a clamping cam 154, one end of the clamping cam 154 is rotatably connected to a second roller, the clamping cam 154 is provided with an arc-shaped bayonet matched with the mounting frame 23, and a tooth groove is provided in the arc-shaped opening; A third micro motor 155 is provided in the adjusting cam 152 and can synchronously drive the two clamping cams 154 to operate. The power output shaft of the third micro motor 155 is connected to a gear plate 552, and the gear plate 552 is meshed with two gear rollers. The structural design of the leveling component 15 enables it to have multiple adjustment functions. Whether it is when it is connected and installed with the total station leveler 2 or when the measuring instrument body 13 is adjusted horizontally, it can be operated flexibly, and the various components cooperate closely with each other, thereby improving the overall leveling efficiency and accuracy.

[0021] Furthermore, a protective shell is provided on one side of the leveling frame 151, and a second micro motor 002 is provided in the protective shell. The output end of the second micro motor 002 is engaged with one end of the hollow rod, and the second micro motor 002 is electrically connected to the first micro motor 001; the protective shell can effectively protect the second micro motor 002, reduce the interference and damage to the motor by external factors, and the electrical connection between the motors is conducive to the coordinated work of various components, so that the entire leveling process is more automated and the complexity and errors of manual operation are reduced.

[0022] Furthermore, a mounting plate is provided at the bottom of the protective cover 11, and a plurality of spring slots cooperating with the leveling frame 151 are provided at the bottom of the mounting plate, and a connecting strip cooperating with the spring slots is provided at the top of the leveling frame 151, and two groups of symmetrically arranged right-angle teeth are provided at the top of the connecting strip; this connection method between the mounting plate and the leveling frame 151 makes the leveling frame 151 easy and stable to install, and the setting of the right-angle teeth further enhances the reliability of the connection, and is not prone to loosening during the operation of the equipment, thereby ensuring the stability of the leveling work.

[0023] Furthermore, the wire at the input end of the third micromotor 155 passes through the inner cavity of the hollow rod; the design of the wire passing through the inner cavity of the hollow rod makes the line layout more regular, avoids problems such as entanglement and damage that may be caused by exposed wires, improves the safety and reliability of the equipment, and reduces equipment abnormalities caused by line failures.

[0024] Furthermore, the power output shaft of the driving motor 24 is connected to a threaded rod, which is threadedly connected to the support leg 25, and one end of the threaded rod is rotatably connected to a limit plate 26. A plurality of limit plates 26 are arranged in a circular array on the outer wall of the cylinder 21, and a sliding groove is provided on the limit plate 26 for sliding cooperation with the support leg 25. Through the cooperation of the driving motor 24, the threaded rod and the limit plate 26, the height of the support leg 25 can be accurately adjusted to realize the leveling function of the total station leveler 2. The limit plates 26 arranged in a circular array make the support leg 25 evenly stressed during the adjustment process, and the setting of the sliding groove ensures the smooth movement of the support leg 25, thereby improving the overall leveling accuracy and stability.

[0025] Furthermore, a mounting plate is provided at one end of the support leg 25, and a screw hole that cooperates with the mounting screw hole is provided on the mounting plate; the screw hole on the mounting plate cooperates with the mounting screw hole of the leveling frame 151, which facilitates the installation and disassembly of the leveling component 15 on the support leg 25, enhances the maintainability and adaptability of the equipment, and enables more convenient adjustment and replacement of components under different usage scenarios and requirements.

[0026] Working principle: Step 1: When the photoelectric measuring device 1 is used alone in a laboratory, it is installed by inserting the connecting strips provided on the multiple leveling components 15 into the adjacent spring slots; After installation, the photoelectric measuring device 1 is placed on the table, and the measuring device body 13 automatically adjusts the tilt by taking the hinge point with the fixed plate as the rotation center. At this time, the second micro motor 002 is started, and the adjusting cam 152 is driven to rotate by the power output shaft of the second micro motor 002. The rotation of the adjusting cam 152 pushes the adjacent adjusting cam 152 to adjust the angle. Since the size of the gear connected to the output shaft of the second micro motor 002 is smaller than the size of the gear connected to the outer side of the hollow rod, when the small-sized gear rotates to drive the large-sized gear to rotate, the rotation of the adjusting cam 152 is slow and subtle. By driving one side of the leveling frame 151 to be lifted, the fineness of the adjustment can be guaranteed. Compared with the traditional gas rod and manual rotation adjustment, it is more precise and the stability of the adjustment is higher. During the above operation, it should be noted that: the second micro motor 002 is electrically connected to the first micro motor 001, and the second micro motor 002 and the first micro motor 001 are started synchronously, that is, the second micro motor 002 is started synchronously, and the first micro motor 001 drives the screw 123 to rotate, and cooperates with the transmission connection of the belt to make the two movable clamping plates 121 move to one side of the fixed clamping plate 122, so as to clamp the positioning rod 14, and then realize the positioning of the measuring instrument body 13; Through the linkage relationship, the leveling component 15 can synchronously drive the positioning component 12 to position the measuring instrument body 13 during adjustment, which is convenient for personnel to adjust, avoids shaking of the measuring instrument body 13 during adjustment, and ensures the stability of the adjustment process; During the process, when further fine-tuning is needed, the third micro motor 155 can be started, and the power of the third micro motor 155 can be used to drive the gear plate 552 to rotate, and the two clamping cams 154 can be synchronously driven to swing and adjust. The swing adjustment of the clamping cam 154 can further push the leveling frame 151 to perform angle lifting adjustment, and the personnel can cooperate to observe the horizontal bubble meter set on the top of the protective cover 11 to perform subtle adjustments, which can further improve the fineness of the adjustment.

[0027] Step 2: When used outdoors, it can be used with the total station leveler 2; Method of use 1: first, place the protective cover 11 on the mounting frame 23, start the third micro motor 155, and drive the two transmission rods 153 and the clamping cam 154 to rotate through the third micro motor 155, and the two clamping cams 154 rotate toward the side close to each other, and fit with the mounting frame 23 through the arc-shaped bayonet to clamp the mounting frame 23, so that the photoelectric measuring device 1 and the total station leveler 2 can be quickly connected and installed; 2. Similarly, after the installation is completed, the adjustment cam 152 can be adjusted in the same way as in "step 1", and the effect of adjusting the lifting is the same; this method can facilitate the rapid installation of the equipment and can realize convenient horizontal adjustment after installation; Method of use 2: When it is necessary to adapt to the traditional total station leveler 2, the photoelectric measuring device 1 can be connected to the total station leveler 2 in a traditional way, and then the multiple leveling components 15 can be disassembled and installed at the bottom of the supporting leg 25. The level of the photoelectric measuring device 1 can be adjusted through the same operation method as in "Step 1" to improve the compatibility with traditional equipment and improve the practicality of the product.

[0028] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A photoelectric measuring instrument that is easy to level, characterized in that: The invention comprises a photoelectric measuring device (1) and a total station leveler (2), wherein a level bubble meter is provided on the top of the photoelectric measuring device (1), and the photoelectric measuring device (1) is mounted on the total station leveler (2), and the photoelectric measuring device (1) comprises a protective cover (11), a positioning component (12) is slidably connected to the inner side of the protective cover (11), one end of the positioning component (12) is connected to a first micro motor (001), a fixing plate is provided on the top of the protective cover (11), one end of the fixing plate is hinged to a measuring instrument body (13), positioning rods (14) cooperating with the positioning component (12) are provided on both sides of the measuring instrument body (13), and a plurality of leveling components (15) are detachably mounted on one side of the protective cover (11), and the leveling components (15) are electrically connected to the first micro motor (001); The total station leveler (2) comprises a cylinder (21), one end of the cylinder (21) is provided with a support platform (22), the top of the support platform (22) is provided with a plurality of mounting frames (23) that cooperate with the leveling assembly (15), the mounting frames (23) are provided with anti-slip grooves, the bottom of the support platform (22) is provided with a plurality of drive motors (24), the power output shafts of the plurality of drive motors (24) are all threadedly connected to support legs (25), and one end of the support leg (25) is provided with a mounting groove that cooperates with the leveling assembly (15).

2. The photoelectric measuring instrument for easy leveling according to claim 1, characterized in that: The positioning assembly (12) comprises a movable clamping plate (121) and a fixed clamping plate (122), wherein the movable clamping plate (121) is slidably connected to the inner bottom wall of the protective cover (11), and the fixed clamping plate (122) is fixedly connected in the protective cover (11), and two symmetrically arranged screw rods (123) are provided on the fixed clamping plate (122), one end of the screw rod (123) is threadedly connected to the movable clamping plate (121), and the other end of the screw rod (123) is connected to the power output shaft of the first micro motor (001), and the first micro motor (001) is provided on the protective cover (11); The plurality of screw rods (123) are connected to each other via a belt drive; The movable clamping plate (121) and the fixed clamping plate (122) are both provided with anti-slip sheets that cooperate with the positioning rod (14) on the sides where they are close to each other.

3. The photoelectric measuring instrument for easy leveling according to claim 1, characterized in that: The leveling assembly (15) comprises a leveling frame (151), the top of the leveling frame (151) is provided with a plurality of mounting screw holes, the bottom of the leveling frame (151) is provided with an arc-shaped groove, a hollow rod is rotatably connected in the arc-shaped groove, an adjusting cam (152) is provided on the hollow rod, one end of the adjusting cam (152) is rotatably connected to a barrel rod, the outer wall of the barrel rod is sleeved with a first roller, a transmission rod (153) is rotatably penetrated in the inner cavity of the barrel rod, one end of the transmission rod (153) is connected to a gear roller, the other end of the transmission rod (153) is connected to a clamping cam (154), one end of the clamping cam (154) is rotatably connected to a second roller, the clamping cam (154) is provided with an arc-shaped bayonet matched with the mounting frame (23), and a tooth groove is provided in the arc-shaped opening; A third micro motor (155) capable of synchronously driving the two clamping cams (154) to operate is disposed inside the regulating cam (152); a power output shaft of the third micro motor (155) is connected to a toothed disc (552); and the toothed disc (552) and the two toothed rollers are arranged to mesh with each other.

4. The photoelectric measuring instrument for easy leveling according to claim 3, characterized in that: A protective shell is provided on one side of the leveling frame (151), a second micro motor (002) is provided in the protective shell, an output end of the second micro motor (002) is engaged with one end of the hollow rod, and the second micro motor (002) is electrically connected to the first micro motor (001).

5. The photoelectric measuring instrument for easy leveling according to claim 4, characterized in that: A mounting plate is provided at the bottom of the protective cover (11), a plurality of spring slots cooperating with the leveling frame (151) are provided at the bottom of the mounting plate, a clamping strip cooperating with the spring slots is provided at the top of the leveling frame (151), and two groups of symmetrically arranged right-angled teeth are provided at the top of the clamping strip.

6. The photoelectric measuring instrument for easy leveling according to claim 3, characterized in that: The wire at the input end of the third micro motor (155) passes through the inner cavity of the hollow rod.

7. The photoelectric measuring instrument for easy leveling according to claim 1, characterized in that: The power output shaft of the driving motor (24) is connected to a threaded rod, the threaded rod is threadedly connected to the support leg (25), one end of the threaded rod is rotatably connected to a limit plate (26), a plurality of limit plates (26) are arranged in a circular array on the outer wall of the cylinder (21), and a sliding groove is provided on the limit plate (26) for sliding cooperation with the support leg (25).

8. The photoelectric measuring instrument for easy leveling according to claim 7, characterized in that: A mounting plate is provided at one end of the support leg (25), and a screw hole matching the mounting screw hole is provided on the mounting plate.

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