Land measuring device and use method thereof

By designing a land measurement device including a protection box, a lifting plate, a laser rangefinder, a universal ball and a self-unlocking locking component, the problems of poor protection and low automation of the laser rangefinder in the prior art are solved, and efficient use convenience and safety are achieved.

CN119803427AInactive Publication Date: 2025-04-11卢龙县土地开发整理中心
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Patent Information

Application Number
CN202510081577.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-20
Publication Date
2025-04-11
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing land measurement device cannot effectively protect the laser rangefinder after use, and lacks automatic unlocking, leveling and locking functions when supporting, making the convenience of use unsatisfactory.

Method used

A land measurement device including a protective box, a lift plate, a laser rangefinder, a universal ball and a self-unlocking locking assembly is designed. The lifting plate is driven by the threaded rotary drive lifting assembly, and the laser rangefinder realizes automatic leveling and locking through a spherical sleeve and a universal ball. At the same time, the self-opening shielded solar power storage module automatically stores solar power when in use, and automatically stores and protects it after use.

Benefits of technology

It realizes safety protection for the laser rangefinder after use, automatically unlocks, leveling and locks, improving the convenience of use and automation. At the same time, through solar power storage and automatic storage protection, the risk of equipment being damaged when carried is reduced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a land measurement device and a use method thereof, the land measurement device comprises a protection box and a laser range finder, the top of the protection box is provided with a storage cavity, the bottom of the protection box is provided with a rectangular groove, and the laser range finder is located in the storage cavity. By arranging a series of structures, the laser range finder can be conveniently driven to move out during use and stored, hidden and protected after use, the safety is ensured while the integrated portability is ensured, the laser range finder can be automatically unlocked in the lifting and moving-out process, the laser range finder can be automatically locked and prevented from shaking after being lifted, and the practicability is high. According to the technical scheme, independent unlocking and fixing operation is not needed, the whole leveling and locking process and moving-out use form an integrated cooperative and matched utilization effect, the use convenience and the automation degree are improved, the support is integrally heightened and the height is automatically reduced when the support is moved out for use, the multifunctional convenient integrated cooperative automatic application effect is achieved, and the practicability is high. And the use convenience and the automation degree are improved.
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Description

Technical Field

[0001] The present invention relates to the technical field of land surveying, and in particular to a land surveying device and a use method thereof. Background Art

[0002] Land development refers to the activities carried out to expand the effective use of land or improve the depth of land use by adopting certain modern scientific and technological economic means in response to the needs of the continuous development of human production, construction and life. It includes the reclamation and utilization of unused land to expand the scope of land use, and also includes the improvement of used land to improve the land utilization rate and intensive management. In land development work, it is necessary to use measuring devices to measure the length and width of the land to calculate the area. Because the reclaimed land is uneven, it is impossible to use a roller measuring device to measure it. Usually, a leather tape measure is used for measurement. When using it, it is easy to cause a large amount of soil to stick to the outside of the leather tape and cause it to be contaminated.

[0003] In this regard, it can be learned from the new structure retrieval report that the announcement number CN219692803U discloses a measuring device for land development, including a ground plug, a rotating rod is provided at the top of the ground plug, a support rod is rotatably installed at the top of the rotating rod, a support plate is fixedly installed at the top of the support rod, a movable ball is movably installed in the support plate, a connecting rod is threadedly installed at the top of the movable ball, a laser rangefinder is provided at the top of the connecting rod, a connecting rod is fixedly installed at the bottom end of the movable ball, a load-bearing ball is fixedly installed at the bottom end of the connecting rod, a cavity is opened inside the support plate, a No. 1 threaded rod is threadedly installed on one side of the support plate, and an arc-shaped stop block is rotatably installed on one side of the No. 1 threaded rod; it has a simple structure, is easy to use, and has strong connectivity, so that the laser rangefinder installed on the movable ball can be kept level, thereby improving the detection accuracy.

[0004] The above technology discloses a land development measurement device, which supports a laser rangefinder through a supporting structure, and uses the laser rangefinder to cooperate with an external pole to perform laser distance measurement. The use of laser distance measurement can avoid the phenomenon that a large amount of soil is easily attached to the traditional leather tape measure and is contaminated during measurement. However, there are the following problems during use: 1. There is a lack of a structure for the safety protection of the laser rangefinder after use. The risk of the laser rangefinder being accidentally damaged when exposed and carried outside is relatively high, and safety cannot be ensured while ensuring portability; 2. Although the laser rangefinder can be conveniently leveled by using a universal ball in combination with a counterweight, a person needs to manually unlock and fix the universal ball before and after leveling, and it cannot automatically unlock, level and lock the universal ball when supporting and using it, and the convenience of use is not ideal; 3. There is a lack of a structure for the integrated height-increasing support during use, and a person needs to manually adjust both sides separately, and the multi-functional integrated collaborative automation is poor, and the convenience of use is not ideal;

[0005] In order to solve the problems of the inability to integrate safety protection of the laser rangefinder after use, the inability to automatically unlock, level and lock the support when in use, the inability to integrate heightening the support when in use, and the poor degree of multi-functional integrated collaborative automation, we propose a land surveying device and its use method to solve the above problems. Summary of the invention

[0006] The land surveying device and the use method thereof proposed in the present invention solve the problems that the laser rangefinder cannot be integrated for safety protection after use, the unlocking, leveling and locking work cannot be integrated when supported and used, the support cannot be integrated to increase height when used, and the multi-functional integrated collaborative automation level is poor.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a land measurement device, comprising a protection box and a laser rangefinder, wherein a storage cavity is provided on the top of the protection box, a rectangular groove is provided on the bottom of the protection box, and the laser rangefinder is located in the storage cavity; the storage cavity is used to integrally store and hide the laser rangefinder for protection when not in use, and the laser rangefinder is used to measure the distance of the land in cooperation with an external benchmark after being removed;

[0008] The sliding sleeve in the storage cavity is provided with a lifting plate, and a threaded rotary drive lifting assembly for driving the lifting plate to lift is installed on the right inner wall of the storage cavity. A spherical sleeve with openings at the top and bottom is embedded and fixed on the top of the lifting plate, and a movable sleeve in the spherical sleeve is provided with a universal ball. The laser rangefinder is fixedly installed on the top of the universal ball, and a counterweight block with a weight larger than that of the laser rangefinder is fixedly connected to the bottom of the universal ball. Vertical support rods are fixedly connected to the left side, front side and rear side of the top of the lifting plate, and the tops of the three vertical support rods are fixedly connected to the same cover plate, and the top of the cover plate is fixedly connected to a U-shaped handle; the threaded rotary drive lifting assembly is used to drive the lifting plate to lift, and the lifting plate is used to drive the cover plate to move up and down to unlock or move back and close through the three vertical support rods. The universal ball and spherical sleeve are used to drive the laser rangefinder to move out upward or retract downward when the lifting plate is lifted, and the counterweight block is used to drive the laser rangefinder to self-adaptively level through the universal ball during the lifting process;

[0009] A rectangular hole is provided on the left side of the top of the lifting plate, and a self-unlocking locking assembly for automatically unlocking the universal ball during the lifting process and automatically locking the universal ball after the lifting is installed in the left inner wall of the storage cavity and the rectangular hole; the self-unlocking locking assembly is used to automatically unlock the universal ball during the lifting process of the lifting plate and automatically lock the universal ball after the lifting is completed, and the locking can prevent the shaking of the universal ball when it is removed for use, causing the laser rangefinder to shake;

[0010] The same self-opening shielding solar energy storage component is installed on the protection box and the cover plate; the self-opening shielding solar energy storage component is used to automatically perform solar energy storage when the cover plate is raised, and is used to protect itself from damage when the cover plate is closed.

[0011] Preferably, the threaded rotary drive lifting assembly includes a fixed plate fixedly connected to the right inner wall of the storage chamber, a rectangular guide rod is fixedly connected between the bottom of the fixed plate and the bottom inner wall of the storage chamber, the lifting plate is slidably sleeved on the rectangular guide rod, a driving motor is fixedly installed on the top of the fixed plate, a first screw rod fixedly connected to the bottom end of the driving motor output shaft is rotatably embedded on the bottom inner wall of the storage chamber, and the lifting plate is threadedly sleeved on the first screw rod.

[0012] Preferably, the self-unlocking locking assembly includes two trapezoidal blocks fixedly connected to the left inner wall of the storage cavity, the right side of the trapezoidal block is set as an inclined surface, the two inclined surfaces are symmetrically arranged, the trapezoidal block located above is slidably sleeved on the vertical support rod on the left, two cross guide columns are fixedly connected between the two side inner walls of the rectangular hole, the two cross guide columns are slidably sleeved with the same U-shaped moving rod, two compression springs in a compressed state are fixedly connected between the left inner wall of the U-shaped moving rod and the right inner wall of the rectangular hole, the compression springs are movably sleeved on the corresponding cross guide columns, both ends of the U-shaped moving rod are fixedly connected with pressure blocks, the right side of the pressure block is adhesively fixed with an anti-slip rubber block, the right sides of the two anti-slip rubber blocks are both in tight contact with the left side of the universal ball, the spherical sleeve is movably sleeved on the two pressure blocks, the top left side and the bottom left side of the U-shaped moving rod are rotatably installed with extrusion wheels, and the extrusion wheels located below are in tight contact with the inclined surface below.

[0013] Preferably, the self-opening shielded solar energy storage assembly includes a battery fixedly mounted on the bottom inner wall of the storage cavity, the top of the battery is fixed and electrically connected to an inverter, the left top of the protection box is fixedly connected to a U-shaped guard plate, the bottom left side of the cover plate is fixedly connected to a solar panel located in the U-shaped guard plate and electrically connected to the battery, and the drive motor and the laser rangefinder are electrically connected to the inverter via soft wires.

[0014] Preferably, two anti-wear balls are movably embedded on the inner walls of the four sides of the spherical sleeve, and the universal ball is located between the eight anti-wear balls and is in movably contact with the anti-wear balls.

[0015] Preferably, a threaded hole threadably connected to the first screw rod is provided on the top of the lifting plate.

[0016] Preferably, the left side of the spherical sleeve is provided with two rectangular through holes which are respectively in active contact with the outer sides of the corresponding pressing blocks.

[0017] Preferably, a lever-type integrated vertical guide lifting support assembly fixedly connected to the threaded rotary drive lifting assembly is installed in the rectangular groove, and the lever-type integrated vertical guide lifting support assembly is used to automatically perform lifting and supporting work in an integrated manner by leveraging the rotation force of the threaded rotary drive lifting assembly when it is lifted out for use; the lever-type integrated vertical guide lifting support assembly includes a second screw rotatably installed between the inner walls on both sides of the rectangular groove, and the bottom of the protection box is movably contacted with a bottom plate, and the bottom of the bottom plate is rectangular and fixedly connected with four plug-in columns with conical structures at the bottom, and two vertical guide shafts are fixedly connected to the two sides of the top of the bottom plate, and two vertical guide grooves are provided on both sides of the bottom of the protection box, and the vertical guide shaft sliding sleeves are arranged in the corresponding vertical guide grooves, and the threaded sleeve on the second screw is provided with a moving seat slidably installed with the inner wall of the top of the rectangular groove, and the front and rear sides of the moving seat are rotatably installed with inclined connecting rods, and the bottom ends of the two connecting rods are hinged to the top of the bottom plate, and the second screw is fixedly provided with a first umbrella gear, and the top of the first umbrella gear is meshed with a second umbrella gear fixedly connected to the bottom end of the first screw.

[0018] Preferably, two T-shaped guide rails are fixedly connected to the top inner wall of the rectangular groove, and the top of the movable seat is provided with two T-shaped slide grooves with openings on both sides, and the T-shaped slide grooves are slidably connected to the corresponding T-shaped guide rails.

[0019] The present invention also provides a method for using the land measurement device, comprising the following steps:

[0020] S1: Use the driving motor to start forward to drive the first screw to rotate and drive the lifting plate to rise. The lifting plate drives the cover plate to rise and unseal through the vertical support rod, and drives the laser rangefinder to be moved out for use through the spherical sleeve and the universal ball in turn;

[0021] S2: When the lifting plate described in S1 moves upward, the U-shaped moving rod is driven to rise through the cross guide column, and the U-shaped moving rod drives the two extrusion wheels to rise. When the lower extrusion wheel moves upward, it gradually separates from the lower inclined surface, releasing the extrusion force on the lower extrusion wheel. The compression spring in the compressed state drives the two anti-skid rubber blocks to the left through the U-shaped moving rod and the two pressure blocks in turn to release the extrusion locking state of the universal ball. When the upper extrusion wheel moves up to be extruded with the upper inclined surface, under the extrusion force, the upper extrusion wheel moves to the right along its inclined surface and drives the U-shaped moving rod to move to the right. The U-shaped moving rod compresses the compression spring to the right, and drives the anti-skid rubber block to squeeze and lock the universal ball to the right through the pressure block;

[0022] S3: During the lifting process of the lifting platform described in S2, when the overall placement is tilted, the weight block automatically rotates downward to a vertical position by its own gravity, and drives the universal ball to rotate adaptively in the spherical sleeve. The universal ball drives the laser rangefinder to automatically rotate to a horizontal position, so as to achieve the effect of automatically unlocking the universal ball during the lifting and removal process and automatically locking the universal ball after the lifting is completed, and the laser rangefinder is automatically leveled in the lifting process after the automatic unlocking, so that the whole leveling and locking process forms an integrated collaborative and complementary utilization effect with the removal process;

[0023] S4: When the cover described in S1 moves upward, it drives the solar panel to move upward, and the solar panel is used to convert solar energy into electrical energy and store it in the battery, and the inverter is used to convert direct current into alternating current for power supply, thereby achieving the effect of solar energy environmental protection power supply;

[0024] S5: When the first screw described in S1 rotates, it also drives the second screw to rotate through the second bevel gear and the first bevel gear in sequence. The second screw rotates to drive the moving seat to move rightward, and the moving seat drives the two connecting rods to rotate and squeeze the bottom plate. Under the squeezing force, the moving seat moves upward and drives the protection box to rise upward to perform the lifting support work, so as to achieve the effect of integrated heightening support when the support is removed for use, and realize the multi-functional convenient integrated collaborative automation application effect;

[0025] S6: When the driving motor is used to reversely start and drive the first screw to rotate, the movement process is completely opposite to the above. The lifting plate is transformed to move downward and drive the laser rangefinder to be protected in the storage cavity, and the cover plate is driven to move downward and closed and drive the solar panel to be stored in the U-shaped guard plate. The moving seat is transformed to move back to the left and drives the two connecting rods to rotate left, gradually releasing the lifting force and driving the protection box to move back downward to lower the height, reducing the occupied height when not in use, making it easier to carry, and achieving the effect of integrated safety protection of the laser rangefinder after use, reducing the risk of accidental damage when it is exposed and carried outside, ensuring safety while ensuring integrated portability.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. This land surveying device, through the cooperation of the protective box, lifting plate, laser rangefinder, vertical support rod, cover plate, threaded rotary drive lifting assembly, ball sleeve, universal ball, counterweight and self-unlocking locking assembly, can drive the laser rangefinder to be moved out during use and store it for hidden protection after use, and can automatically unlock the universal ball during the lifting and moving process and automatically lock the universal ball after the lifting is completed, and can automatically level the laser rangefinder during the lifting and unlocking process, without the need for separate unlocking and fixing operations, and the entire leveling and locking process forms an integrated collaborative and mutual utilization effect with the removal use, thereby improving the convenience of use and the degree of automation; it has a significant and convenient use effect of integrated collaborative and mutual assistance application of the entire removal and unlocking self-leveling and locking process;

[0028] 2. This land surveying device, through the cooperation of the self-opening shielding solar energy storage component and the cover plate, can automatically use solar energy to store electricity when it is moved out for use, and automatically store and protect the solar panel when it is stored after use, thereby reducing the risk of accidental damage to the laser rangefinder and the solar panel when they are exposed and carried outside, and ensuring safety while ensuring portability; by combining the laser rangefinder with the above-mentioned removal and storage for integrated collaborative application, there is no need to perform a separate post-use protection operation, and it has the advantages of power storage application and integrated convenient and safe carrying;

[0029] 3. This land surveying device, through the cooperation of the threaded rotary drive lifting assembly and the lever-type integrated vertical guide lifting support assembly, can raise the support when the support is removed for use, and automatically lower the height when it is stored after use, without the need for personnel to manually adjust the two sides separately, and uses a single drive to achieve multi-functions, so as to achieve a multi-function integrated coordinated mutual matching automatic application effect, improve the convenience of use and the degree of automation; it has a significant and convenient use effect of combining the above functions for multi-function integrated coordinated mutual assistance application;

[0030] The present invention is provided with a series of structures, which are convenient for driving the laser rangefinder to be moved out when in use and for storing and hiding it for protection after use, thereby ensuring safety while ensuring integrated portability, and being able to automatically unlock the laser rangefinder during the lifting and moving-out process to level it and automatically lock it to prevent shaking after lifting, without the need for separate unlocking and fixing operations, and the entire leveling and locking process forms an integrated collaborative and complementary utilization effect with the moving-out use, thereby improving the convenience of use and the degree of automation, and facilitating the integrated height increase support and automatic height reduction when moving out for support use, thereby realizing a multifunctional convenient integrated collaborative and automated application effect, thereby improving the convenience of use and the degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of a land surveying device proposed in Embodiment 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of a front cross-sectional structure of a land surveying device proposed in the first embodiment of the present invention;

[0033] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0034] Figure 4 This is a schematic diagram of the structure of a land surveying device proposed in the second embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of a front cross-sectional structure of a land surveying device proposed in the second embodiment of the present invention;

[0036] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of part B in FIG.

[0037] Figure 7 This is a structural schematic diagram of a laser rangefinder and a solar panel of a land surveying device proposed in Embodiment 2 of the present invention being moved out and raised to support the device.

[0038] In the figure: 1, protection box; 101, storage cavity; 102, rectangular slot; 2, laser rangefinder; 3, lifting plate; 301, rectangular hole; 302, vertical support rod; 303, cover plate; 304, U-shaped handle; 4, spherical sleeve; 401, anti-wear ball; 402, universal ball; 403, counterweight; 5, fixing plate; 501, driving motor; 502, rectangular guide rod; 503, first screw; 6, trapezoidal block; 601, inclined surface; 602, horizontal guide column; 603, U-shaped moving rod; 604, compression spring; 605, pressure block; 606, anti-skid rubber block; 607, extrusion wheel; 7, U-shaped guard plate; 701, solar panel; 702, battery; 703, inverter; 8, second screw; 801, moving seat; 802, connecting rod; 803, bottom plate; 804, plug column; 805, vertical guide shaft; 806, first bevel gear; 807, second bevel gear; 808, vertical guide groove; 809, T-shaped guide rail. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Embodiment 1

[0041] like Figures 1 to 3As shown, a land measurement device proposed in this embodiment includes a protection box 1 and a laser rangefinder 2. A storage cavity 101 is provided on the top of the protection box 1, and a rectangular groove 102 is provided on the bottom of the protection box 1. The laser rangefinder 2 is located in the storage cavity 101. The storage cavity 101 is used to integrally store and hide the laser rangefinder 2 for protection when not in use. The laser rangefinder 2 is used to measure the distance of the land in cooperation with an external pole after being removed.

[0042] A lifting plate 3 is provided in the sliding sleeve of the storage chamber 101, and a threaded rotary drive lifting component for driving the lifting plate 3 to lift is installed on the right inner wall of the storage chamber 101. A spherical sleeve 4 with openings on the top and bottom is fixed on the top of the lifting plate 3, wherein the top of the lifting plate 3 is provided with an embedding hole fixedly connected to the outer side of the spherical sleeve 4, and a universal ball 402 is provided in the movable sleeve of the spherical sleeve 4, wherein two anti-wear balls 401 are movably embedded on the four inner walls of the spherical sleeve 4, the universal ball 402 is located between the eight anti-wear balls 401 and is in active contact with the anti-wear balls 401, so as to provide an anti-wear and active support for the universal ball 402, and the laser rangefinder 2 is fixedly installed on the top of the universal ball 402, and the bottom of the universal ball 402 A counterweight block 403 heavier than the laser rangefinder 2 is fixedly connected, the top left side, top front side and top rear side of the lifting plate 3 are fixedly connected with vertical support rods 302, the top ends of the three vertical support rods 302 are fixedly connected with the same cover plate 303, and the top of the cover plate 303 is fixedly connected with a U-shaped handle 304; the threaded rotary drive lifting assembly is used to drive the lifting plate 3 to rise and fall, and the lifting plate 3 is used to drive the cover plate 303 to move up to unlock or move back to close through the three vertical support rods 302, the universal ball 402 and the spherical sleeve 4 are used to drive the laser rangefinder 2 to move out upward or retract downward when the lifting plate 3 is raised and lowered, and the counterweight block 403 is used to drive the laser rangefinder 2 to perform adaptive leveling work through the universal ball 402 during the lifting process;

[0043] A rectangular hole 301 is provided on the left side of the top of the lifting plate 3, and a self-unlocking locking component for automatically unlocking the universal ball 402 during the lifting process and automatically locking it after lifting is installed on the left inner wall of the storage cavity 101 and the rectangular hole 301; the self-unlocking locking component is used to automatically unlock the universal ball 402 during the lifting process of the lifting plate 3 and automatically lock the universal ball 402 after the lifting is completed, and the locking can prevent the universal ball 402 from shaking when it is removed for use, causing the laser rangefinder 2 to shake; the protection box 1 and the cover 303 are installed with the same self-opening shielding solar energy storage component; the self-opening shielding solar energy storage component is used to automatically perform solar energy storage when the cover 303 is raised, and is used to protect itself from damage when the cover 303 is closed.

[0044] Specifically, the threaded rotary drive lifting assembly includes a fixed plate 5 fixedly connected to the right inner wall of the storage chamber 101, a rectangular guide rod 502 is fixedly connected between the bottom of the fixed plate 5 and the bottom inner wall of the storage chamber 101, and the lifting plate 3 is slidably sleeved on the rectangular guide rod 502, wherein the top of the lifting plate 3 is provided with a rectangular guide hole that is slidably sleeved with the outer side of the rectangular guide rod 502, which plays the effect of guiding the vertical sliding of the lifting plate 3, and a driving motor 501 is fixedly installed on the top of the fixed plate 5, and a first screw 503 fixedly connected to the bottom end of the output shaft of the driving motor 501 is rotatably embedded on the bottom inner wall of the storage chamber 101, wherein a circular through hole is provided on the bottom inner wall of the storage chamber 101, and a first screw 503 fixedly connected to the bottom end of the output shaft of the driving motor 501 is fixedly sleeved in the circular through hole The inner ring of the first bearing is fixedly mounted on the outer side of the first screw 503, which has the effect of rotatably installing the first screw 503. The lifting plate 3 is threadedly sleeved on the first screw 503, wherein a threaded hole threadedly connected to the first screw 503 is opened on the top of the lifting plate 3. The threaded connection relationship between the first screw 503 and the threaded hole is utilized to facilitate the effect of driving the lifting plate 3 up and down when the first screw 503 rotates; the set fixed plate 5, rectangular guide rod 502, driving motor 501 and first screw 503 cooperate, and the driving motor 501 is used to drive the first screw 503 to rotate. The rotation of the first screw 503 drives the lifting plate 3 to rise and fall, and the rectangular guide rod 502 is used to vertically guide the lifting plate 3.

[0045] Furthermore, the self-unlocking locking assembly includes two trapezoidal blocks 6 fixedly connected to the left inner wall of the storage cavity 101, the right side of the trapezoidal block 6 is arranged as an inclined surface 601, and the two inclined surfaces 601 are arranged symmetrically, the trapezoidal block 6 located on the upper side is slidably sleeved on the vertical support rod 302 on the left side, wherein the top of the trapezoidal block 6 on the upper side is provided with a vertical guide hole that is slidably sleeved with the outer side of the vertical support rod 302 on the left side, and has the effect of guiding the vertical sliding of the vertical support rod 302 on the left side, and two cross guide posts 602 are fixedly connected between the inner walls on both sides of the rectangular hole 301, and the two cross guide posts 602 are slidably sleeved with the same U-shaped moving rod 603, wherein the left side of the U-shaped moving rod 603 is provided with two cross guide holes that are respectively slidably sleeved with the outer sides of the corresponding cross guide posts 602, and have the effect of guiding the U-shaped moving rod 603 to slide laterally. Two compression springs 604 in a compressed state are fixedly connected between the left inner wall of the movable rod 603 and the right inner wall of the rectangular hole 301. The compression springs 604 are movably mounted on the corresponding transverse guide pillars 602. Both ends of the U-shaped movable rod 603 are fixedly connected with pressure blocks 605. The right side of the pressure blocks 605 is bonded and fixed with anti-skid rubber blocks 606. The right sides of the two anti-skid rubber blocks 606 are tightly contacted with the left side of the universal ball 402. The spherical sleeve 4 is movably mounted on the two pressure blocks 605, wherein the left side of the spherical sleeve 4 is provided with two rectangular through holes that are movably contacted with the outer sides of the corresponding pressure blocks 605, respectively, so as to allow the pressure blocks 605 to movably pass through. Extrusion wheels 607 are rotatably mounted on the top left side and the bottom left side of the U-shaped movable rod 603, and the extrusion wheels 607 located at the bottom are tightly contacted with the inclined surface 601 at the bottom.The set trapezoidal block 6, inclined surface 601, horizontal guide column 602, U-shaped moving rod 603, compression spring 604, pressure block 605, anti-skid rubber block 606 and extrusion wheel 607 cooperate. When the lifting plate 3 is raised, the U-shaped moving rod 603 is driven to rise through the horizontal guide column 602, and the U-shaped moving rod 603 drives the two extrusion wheels 607 to rise. When the lower extrusion wheel 607 moves upward, it gradually separates from the lower inclined surface 601, and the extrusion force on the lower extrusion wheel 607 is released. At this time, the compression wheel 607 in the compressed state The elastic force of the compression spring 604 drives the U-shaped moving rod 603 to move to the left, and the U-shaped moving rod 603 drives the two anti-skid rubber blocks 606 to the left through the two pressure blocks 605 to release the squeeze locking state of the universal ball 402. When the upper squeezing wheel 607 moves up to squeeze the upper inclined surface 601, under the squeezing force, the upper squeezing wheel 607 moves rightward along its inclined surface and drives the U-shaped moving rod 603 to move to the right. The U-shaped moving rod 603 compresses the compression spring 604 to the right, and the U-shaped moving rod 603 drives the anti-skid rubber block 606 to squeeze and lock the universal ball 402 to the right through the pressure block 605, and when the lifting plate 3 moves downward, it moves away from it upward. When the upper extrusion wheel 607 separates from the upper inclined surface 601, the elastic force of the compression spring 604 in the compressed state drives the anti-skid rubber block 606 to move to the left for unlocking. When the lower extrusion wheel 607 moves down to squeeze the lower inclined surface 601, the U-shaped moving rod 603 moves to the right again and drives the anti-skid rubber block 606 to squeeze and lock the universal ball 402, so as to achieve the effect of automatically unlocking the universal ball 402 during the lifting process of the lifting plate 3 and automatically locking the universal ball 402 after the lifting is completed. The automatic unlocking during the lifting process is combined with the counterweight block 403 to form an adaptive leveling method, and then combined with the automatic locking after removal to prevent shaking, there is no need to perform unlocking and fixing operations separately, and the entire leveling and locking process forms an integrated collaborative and complementary utilization effect with the removal use, thereby improving the convenience of use and the degree of automation. ;

[0046] Furthermore, the self-opening shielded solar energy storage assembly includes a battery 702 fixedly mounted on the inner wall of the bottom of the storage chamber 101, the top of the battery 702 is fixedly connected to an inverter 703 and electrically connected, the top of the left side of the protection box 1 is fixedly connected to a U-shaped guard plate 7, the bottom left side of the cover plate 303 is fixedly connected to a solar panel 701 located in the U-shaped guard plate 7 and electrically connected to the battery 702, and the drive motor 501 and the laser rangefinder 2 are both electrically connected to the inverter 703 through a flexible wire; the battery 702, the inverter 703, the U-shaped guard plate 7 and the solar panel 701 are arranged 01, when the cover 303 is moved up to be unsealed, the cover 303 also drives the solar panel 701 to move upward and out, and uses the solar panel 701 to convert solar energy into electrical energy and store it in the battery 702, and uses the inverter 703 to convert direct current into alternating current for power supply, thereby achieving the effect of solar energy environmentally friendly power supply. In addition, when the rear cover 303 is moved down, it drives the solar panel 701 downward to be retracted into the U-shaped protective plate 7, so that the solar panel 701 is automatically stored, hidden and protected when closed after use, reducing the risk of accidental damage when carrying it, and improving safety when carrying it.

[0047] This embodiment can drive the laser rangefinder 2 to be moved out when in use and store it for hidden protection after use, and can automatically unlock the universal ball 402 during the lifting and moving process and automatically lock the universal ball 402 after the lifting and lifting are completed, and can automatically level the laser rangefinder 2 during the lifting and unlocking process, without the need for separate unlocking and fixing operations, and the entire leveling and locking process forms an integrated collaborative and complementary utilization effect with the removal use, thereby improving the convenience of use and the degree of automation; and can automatically utilize solar energy for power storage when moved out for use, and automatically store and protect the solar panel 701 when stored after use, reducing the risk of damage caused by accidental contact when exposed and carried outside, ensuring safety while ensuring integrated portability, and realizing a multi-functional way of single drive, realizing a multi-functional convenient integrated collaborative and automated application effect, thereby improving the convenience of use and the degree of automation.

[0048] This embodiment also provides a method for using the land measurement device, comprising the following steps:

[0049] S1: The driving motor 501 is started forward to drive the first screw rod 503 to rotate and drive the lifting plate 3 to rise. The lifting plate 3 drives the cover plate 303 to rise and unseal through the vertical support rod 302, and drives the laser rangefinder 2 to be moved out for use through the spherical sleeve 4 and the universal ball 402 in turn;

[0050] S2: When the lifting plate 3 in S1 moves upward, the U-shaped moving rod 603 is driven to rise through the cross guide column 602, and the U-shaped moving rod 603 drives the two extrusion wheels 607 to rise. When the lower extrusion wheel 607 moves upward, it gradually separates from the lower inclined surface 601, releasing the extrusion force on the lower extrusion wheel 607. The compression spring 604 in the compressed state drives the two anti-skid rubber blocks 606 to the left through the U-shaped moving rod 603 and the two pressure blocks 605 in turn to release the extrusion locking state of the universal ball 402. When the upper extrusion wheel 607 moves upward to be extruded with the upper inclined surface 601, under the extrusion force, the upper extrusion wheel 607 moves to the right along its inclined surface and drives the U-shaped moving rod 603 to move to the right. The U-shaped moving rod 603 compresses the compression spring 604 to the right, and drives the anti-skid rubber block 606 to squeeze and lock the universal ball 402 to the right through the pressure block 605;

[0051] S3: During the lifting process of the lifting plate 3 in S2, when the whole is placed and tilted, the weight block 403 is automatically rotated downward to a vertical position by its own gravity, and the universal ball 402 is driven to rotate adaptively in the spherical sleeve 4. The universal ball 402 drives the laser rangefinder 2 to automatically rotate to a horizontal position, so as to achieve the effect of automatically unlocking the universal ball 402 during the lifting and removal process and automatically locking the universal ball 402 after the lifting is completed, and the lifting process after automatic unlocking is used to automatically level the laser rangefinder 2, without the need for separate unlocking and fixing operations, and the whole leveling and locking process forms an integrated collaborative and mutual utilization effect with the removal use, thereby improving the convenience of use and the degree of automation;

[0052] S4: When the cover plate 303 in S1 moves upward, it drives the solar panel 701 to move upward, and the solar panel 701 is used to convert solar energy into electrical energy and store it in the battery 702, and the inverter 703 is used to convert direct current into alternating current for power supply, thereby achieving the effect of solar energy environmental protection power supply;

[0053] S5: When the driving motor 501 is used to reversely start and drive the first screw 503 to rotate, the lifting plate 3 is completely opposite to the above movement process, and the lifting plate 3 is transformed to move downward and drive the laser rangefinder 2 to be stored in the storage cavity 101 for protection, and the cover plate 303 is driven to move downward and close and drive the solar panel 701 to be stored in the U-shaped protective plate 7, so as to achieve the effect of integrated safety protection of the laser rangefinder 2 and the solar panel 701 after use, reduce the risk of accidental damage when exposed to the outside and carried, and ensure safety while ensuring integrated portability.

[0054] Embodiment 2

[0055] like Figures 4 to 7As shown, this embodiment is based on the embodiment 1, and its difference from the embodiment 1 is that: a lever-type integrated vertical guide lifting support assembly fixedly connected to the threaded rotary drive lifting assembly is installed in the rectangular groove 102, and the lever-type integrated vertical guide lifting support assembly is used to use the rotational force of the threaded rotary drive lifting assembly to automatically perform lifting support work when it is lifted out for use; the lever-type integrated vertical guide lifting support assembly includes a second screw rod 8 rotatably installed between the inner walls on both sides of the rectangular groove 102, wherein the inner walls on both sides of the rectangular groove 102 are fixedly connected with second bearings, and the inner ring of the second bearing is fixedly mounted on the outer side of the second screw rod 8, which has the effect of rotatably installing the second screw rod 8, and the bottom of the protective box 1 is movably in contact with a bottom plate 803, and the bottom plate 803 The bottom of the rectangular shape is fixedly connected with four plug posts 804 with conical structures at the bottom, two vertical guide shafts 805 are fixedly connected on both sides of the top of the bottom plate 803, two vertical guide grooves 808 are provided on both sides of the bottom of the protection box 1, and the vertical guide shafts 805 are slidably sleeved in the corresponding vertical guide grooves 808. The second screw rod 8 is threadedly sleeved with a movable seat 801 slidably mounted on the top inner wall of the rectangular groove 102, wherein the right side of the movable seat 801 is provided with a threaded through hole threadedly connected to the second screw rod 8, and the threaded connection relationship between the second screw rod 8 and the threaded through hole is utilized to facilitate the effect of driving the movable seat 801 to move right and left when the second screw rod 8 rotates, and two T-shaped guide rails 80 are fixedly connected to the top inner wall of the rectangular groove 102 9. The top of the movable seat 801 is provided with two T-shaped slide grooves with openings on both sides. The T-shaped slide grooves are slidably connected with the corresponding T-shaped guide rails 809, which play the role of guiding the lateral sliding of the movable seat 801. The front and rear sides of the movable seat 801 are rotatably installed with inclined connecting rods 802. The bottom ends of the two connecting rods 802 are hinged to the top of the bottom plate 803. The second screw rod 8 is fixedly sleeved with a first bevel gear 806. The top of the first bevel gear 806 is meshed with a second bevel gear 807 fixedly connected to the bottom end of the first screw rod 503; the second screw rod 8, the movable seat 801, the bottom plate 803, the vertical guide shaft 805, the connecting rod 802, the plug column 804, the first bevel gear 806 and the first bevel gear 807 are fixedly connected to the bottom end of the first screw rod 503; The two bevel gears 807 cooperate with each other, and when the first screw rod 503 rotates, its rotational force is used to drive the second bevel gear 807 to rotate as a whole. The second bevel gear 807 drives the second screw rod 8 to rotate through the first bevel gear 806. The second screw 8 rotates and drives the movable seat 801 to move right or move back to the left. When the movable seat 801 moves to the right, it drives the two connecting rods 802 to rotate and squeeze the bottom plate 803. Under the squeezing force, the movable seat 801 moves upward and drives the protective box 1 to rise upward to perform the lifting support work. When the movable seat 801 moves back to the left, it drives the two connecting rods 802 to rotate left, gradually releasing the lifting force and driving the protective box 1 to move back downward to lower the height, thereby reducing the occupied height when not in use and facilitating carrying.

[0056] This embodiment facilitates the integrated height increase of the support when the support is removed for use, and the integrated height automatic lowering when stored after use, without the need for personnel to manually adjust the two sides separately, and a single drive realizes multi-functions, thereby achieving a multi-function convenient integrated collaborative automation application effect, improving ease of use and the degree of automation.

[0057] This embodiment also provides a method for using the land measurement device, comprising the following steps:

[0058] S1: The driving motor 501 is started forward to drive the first screw rod 503 to rotate and drive the lifting plate 3 to rise. The lifting plate 3 drives the cover plate 303 to rise and unseal through the vertical support rod 302, and drives the laser rangefinder 2 to be moved out for use through the spherical sleeve 4 and the universal ball 402 in turn;

[0059] S2: When the lifting plate 3 in S1 moves upward, the U-shaped moving rod 603 is driven to rise through the cross guide column 602, and the U-shaped moving rod 603 drives the two extrusion wheels 607 to rise. When the lower extrusion wheel 607 moves upward, it gradually separates from the lower inclined surface 601, releasing the extrusion force on the lower extrusion wheel 607. The compression spring 604 in the compressed state drives the two anti-skid rubber blocks 606 to the left through the U-shaped moving rod 603 and the two pressure blocks 605 in turn to release the extrusion locking state of the universal ball 402. When the upper extrusion wheel 607 moves upward to be extruded with the upper inclined surface 601, under the extrusion force, the upper extrusion wheel 607 moves to the right along its inclined surface and drives the U-shaped moving rod 603 to move to the right. The U-shaped moving rod 603 compresses the compression spring 604 to the right, and drives the anti-skid rubber block 606 to squeeze and lock the universal ball 402 to the right through the pressure block 605;

[0060] S3: During the lifting process of the lifting plate 3 in S2, when the whole is placed and tilted, the weight block 403 is automatically rotated downward to a vertical position by its own gravity, and the universal ball 402 is driven to rotate adaptively in the spherical sleeve 4. The universal ball 402 drives the laser rangefinder 2 to automatically rotate to a horizontal position, so as to achieve the effect of automatically unlocking the universal ball 402 during the lifting and removal process and automatically locking the universal ball 402 after the lifting is completed, and the lifting process after automatic unlocking is used to automatically level the laser rangefinder 2, without the need for separate unlocking and fixing operations, and the whole leveling and locking process forms an integrated collaborative and mutual utilization effect with the removal use, thereby improving the convenience of use and the degree of automation;

[0061] S4: When the cover plate 303 in S1 moves upward, it drives the solar panel 701 to move upward, and the solar panel 701 is used to convert solar energy into electrical energy and store it in the battery 702, and the inverter 703 is used to convert direct current into alternating current for power supply, thereby achieving the effect of solar energy environmental protection power supply;

[0062] S5: When the first screw 503 in S1 rotates, it also drives the second screw 8 to rotate through the second bevel gear 807 and the first bevel gear 806 in sequence. The second screw 8 rotates to drive the moving seat 801 to move rightward, and the moving seat 801 drives the two connecting rods 802 to rotate and squeeze the bottom plate 803. Under the squeezing force, the moving seat 801 moves upward and drives the protection box 1 to rise upward to perform the lifting support work, so as to achieve the effect of integrated heightening support when the support is removed for use, without the need for personnel to manually adjust the two sides separately, so as to achieve a multifunctional, convenient, integrated, coordinated and automated application effect, thereby improving the convenience of use and the degree of automation;

[0063] S6: When the driving motor 501 is used to reversely start and drive the first screw 503 to rotate, the movement process is completely opposite to the above. The lifting plate 3 changes to move downward and drives the laser rangefinder 2 to be protected in the storage cavity 101, and drives the cover plate 303 to move downward and close and drives the solar panel 701 to be stored in the U-shaped protective plate 7. The movable seat 801 changes to move back to the left and drives the two connecting rods 802 to rotate left, gradually releasing the lifting force and driving the protection box 1 to move back downward to lower the height, reducing the occupied height when not in use, facilitating carrying work, and achieving the effect of integrated safety protection of the laser rangefinder 2 and the solar panel 701 after use, reducing the risk of accidental damage when exposed to the outside when carried, and ensuring safety while ensuring integrated portability.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A land surveying device, comprising a protective box (1) and a laser rangefinder (2), characterized in that: The top of the protection box (1) is provided with a storage cavity (101), the bottom of the protection box (1) is provided with a rectangular groove (102), and the laser rangefinder (2) is located in the storage cavity (101); The sliding sleeve in the storage chamber (101) is provided with a lifting plate (3), and a threaded rotary drive lifting assembly for driving the lifting plate (3) to lift is installed on the right inner wall of the storage chamber (101). A spherical sleeve (4) with openings at the top and bottom is fixedly mounted on the top of the lifting plate (3), and a movable sleeve in the spherical sleeve (4) is provided with a universal ball (402). The laser rangefinder (2) is fixedly mounted on the top of the universal ball (402), and a counterweight (403) with a weight greater than that of the laser rangefinder (2) is fixedly connected to the bottom of the universal ball (402). The top left side, the top front side and the top rear side of the lifting plate (3) are all fixedly connected with vertical support rods (302), the top ends of the three vertical support rods (302) are fixedly connected with the same cover plate (303), and the top of the cover plate (303) is fixedly connected with a U-shaped handle (304); A rectangular hole (301) is provided on the left side of the top of the lifting plate (3), and a self-unlocking locking component for automatically unlocking the universal ball (402) during the lifting process and automatically locking it after lifting is installed on the left inner wall of the storage cavity (101) and in the rectangular hole (301); The same self-opening shielding solar energy storage component is installed on the protection box (1) and the cover plate (303).

2. A land surveying device according to claim 1, characterized in that: The threaded rotary drive lifting assembly comprises a fixed plate (5) fixedly connected to the right inner wall of the storage chamber (101); a rectangular guide rod (502) is fixedly connected between the bottom of the fixed plate (5) and the bottom inner wall of the storage chamber (101); the lifting plate (3) is slidably sleeved on the rectangular guide rod (502); a driving motor (501) is fixedly installed on the top of the fixed plate (5); a first screw rod (503) fixedly connected to the bottom end of the output shaft of the driving motor (501) is rotatably embedded on the bottom inner wall of the storage chamber (101); and the lifting plate (3) is threadedly sleeved on the first screw rod (503).

3. A land surveying device according to claim 1, characterized in that: The self-unlocking locking assembly comprises two trapezoidal blocks (6) fixedly connected to the left inner wall of the storage cavity (101), the right side of the trapezoidal block (6) is arranged as an inclined surface (601), the two inclined surfaces (601) are arranged symmetrically, the trapezoidal block (6) located at the top is slidably sleeved on the left vertical support rod (302), two transverse guide pillars (602) are fixedly connected between the inner walls on both sides of the rectangular hole (301), the same U-shaped moving rod (603) is slidably sleeved on the two transverse guide pillars (602), and two compression-state fixedly connected between the left inner wall of the U-shaped moving rod (603) and the right inner wall of the rectangular hole (301) The compression spring (604) is movably mounted on the corresponding transverse guide column (602). Both ends of the U-shaped moving rod (603) are fixedly connected with a pressure block (605). The right side of the pressure block (605) is bonded and fixed with an anti-skid rubber block (606). The right sides of the two anti-skid rubber blocks (606) are in tight contact with the left side of the universal ball (402). The spherical sleeve (4) is movably mounted on the two pressure blocks (605). The top left side and the bottom left side of the U-shaped moving rod (603) are rotatably mounted with an extrusion wheel (607). The extrusion wheel (607) located at the bottom is in tight contact with the inclined surface (601) below.

4. A land surveying device according to claim 2, characterized in that: The self-opening shielded solar energy storage assembly comprises a storage battery (702) fixedly mounted on the inner wall of the bottom of the storage chamber (101); the top of the storage battery (702) is fixedly connected to and electrically connected to an inverter (703); the top of the left side of the protection box (1) is fixedly connected to a U-shaped protective plate (7); the bottom left side of the cover plate (303) is fixedly connected to a solar panel (701) located in the U-shaped protective plate (7) and electrically connected to the storage battery (702); and the drive motor (501) and the laser rangefinder (2) are both electrically connected to the inverter (703) via flexible wires.

5. A land surveying device according to claim 1, characterized in that: Two anti-wear balls (401) are movably embedded on the inner walls of the four sides of the spherical sleeve (4), and the universal ball (402) is located between the eight anti-wear balls (401) and is in movably contact with the anti-wear balls (401).

6. A land surveying device according to claim 2, characterized in that: The top of the lifting plate (3) is provided with a threaded hole which is threadedly connected to the first screw rod (503).

7. A land surveying device according to claim 3, characterized in that: The left side of the spherical sleeve (4) is provided with two rectangular through holes which are respectively in active contact with the outer sides of the corresponding pressing blocks (605).

8. A land surveying device according to claim 2, characterized in that: A lever-type integrated vertical guide and lifting support assembly fixedly connected to the threaded rotary drive lifting assembly is installed in the rectangular groove (102), and the lever-type integrated vertical guide and lifting support assembly includes a second screw rod (8) rotatably installed between the inner walls on both sides of the rectangular groove (102). The bottom of the protection box (1) is movably in contact with a bottom plate (803), and the bottom of the bottom plate (803) is rectangular and fixedly connected with four plug posts (804) with conical bottom structures. Two vertical guide shafts (805) are fixedly connected to both sides of the top of the bottom plate (803), and two vertical guide grooves (808) are provided on both sides of the bottom of the protection box (1). The vertical guide shaft (805) is slidably sleeved in the corresponding vertical guide groove (808), the second screw rod (8) is threadedly sleeved with a movable seat (801) slidably mounted on the top inner wall of the rectangular groove (102), the front and rear sides of the movable seat (801) are rotatably mounted with inclined connecting rods (802), the bottom ends of the two connecting rods (802) are hinged to the top of the bottom plate (803), the second screw rod (8) is fixedly sleeved with a first bevel gear (806), and the top of the first bevel gear (806) is meshed with a second bevel gear (807) fixedly connected to the bottom end of the first screw rod (503).

9. A land surveying device according to claim 8, characterized in that: Two T-shaped guide rails (809) are fixedly connected to the top inner wall of the rectangular groove (102), and two T-shaped slide grooves with openings on both sides are provided on the top of the movable seat (801), and the T-shaped slide grooves are slidably connected to the corresponding T-shaped guide rails (809).

10. A method for using a land surveying device, characterized in that: The following steps are involved: S1: The driving motor (501) is started in a positive direction to drive the first screw rod (503) to rotate and drive the lifting plate (3) to rise, thereby driving the cover plate (303) to rise and unseal and drive the laser rangefinder (2) to be removed for use; S2: When the lifting plate (3) described in S1 moves upward, it drives the two squeezing wheels (607) to rise and separate from the inclined surface (601) below. The compression spring (604) drives the two anti-skid rubber blocks (606) to release the squeezing and locking state of the universal ball (402) to the left through the U-shaped moving rod (603) and the two pressing blocks (605). When the upper squeezing wheel (607) moves upward to squeeze the upper inclined surface (601), it moves rightward along its inclined surface and drives the anti-skid rubber blocks (606) to squeeze and lock the universal ball (402) to the right through the U-shaped moving rod (603) and the pressing block (605). S3: During the lifting process of the lifting plate (3) described in S2, the counterweight (403) rotates to a vertical position under its own weight, and drives the laser rangefinder (2) to automatically rotate to a horizontal position through the universal ball (402); S4: When the cover plate (303) described in S1 moves upward, it drives the solar panel (701) to move upward, and the solar panel (701) is used to convert solar energy into electrical energy and store it in the storage battery (702), and the inverter (703) is used to convert direct current into alternating current for power supply; S5: When the first screw rod (503) described in S1 rotates, it also drives the second screw rod (8) to rotate, so as to drive the movable seat (801) to move rightward. The movable seat (801) drives the two connecting rods (802) to rotate and squeeze the bottom plate (803). Under the squeezing force, the movable seat (801) moves upward and drives the protection box (1) to rise upward, thereby performing the lifting support work; S6: When the driving motor (501) is used to start the first screw rod (503) in reverse and rotate, the lifting plate (3) is transformed into moving downward and drives the laser rangefinder (2) to be stored in the storage chamber (101), and drives the cover plate (303) to move downward and close and drives the solar panel (701) to be stored in the U-shaped guard plate (7). The movable seat (801) is transformed into moving back to the left and drives the two connecting rods (802) to rotate left, gradually releasing the lifting force and driving the protection box (1) to move back downward to reduce the height.

Citation Information

Patent Citations

  • Measuring device for land development

    CN219692803U