Support device for engineering surveying

Abstract

The utility model discloses a support device for engineering surveying relates to engineering surveying technical field, including installation platform, telescopic support foot and total station, the number of telescopic support foot is three, and all rotationally connected in installation platform lower extreme a week, total station sets up installation platform top, and with installation platform swing joint. The utility model discloses the cooperation of installation platform, telescopic support foot, total station, docking groove, placement groove, fixing device, clamping joint assembly, linkage control mechanism, linkage, control self -locking spare, worm, knob, docking seat, draw -in groove and packaging board is used, need not work piece and screw thread cooperation can realize total station quick docking installation and disassembly, shorten operation preparation time, and can avoid the problem of the thread abrasion, improper operation and cause the silk and structural damage, connect stablely simultaneously, and the total station accidental drop possible of great reduction.

Description

Technical Field

[0001] This utility model relates to the field of engineering measurement technology, specifically to a support device used for engineering measurement. Background Technology

[0002] In fields such as engineering construction, geological exploration, and topographic mapping, engineering surveying is a core component ensuring the accurate implementation of projects. Support devices, as the foundation for the stable operation of surveying equipment, directly affect the accuracy of measurement data and operational efficiency. Currently, commonly used support devices in engineering surveying include tripods, lifting platforms, and other types. Among them, the total station tripod, due to its stable structure, portability, and wide adaptability, has become a core auxiliary device for high-precision surveying operations with a total station. Its height and level are adjusted via three retractable legs at the bottom, while the upper platform is used to fix the total station, ensuring stability in complex conditions such as rugged terrain in the field and construction sites, providing reliable support for core functions such as angle and distance measurement. With the accelerating pace of engineering surveying operations, higher demands are placed on the ease of installation and equipment protection of the total station tripod. Most existing total station tripods connect to the total station using threaded connections. The bottom of the total station has connecting screw holes, and the tripod platform has corresponding screws. Fixing is achieved by rotating the total station to engage the screw holes and screws. However, in actual use, the existing connection method of the total station tripod requires multiple rotations for alignment, making it difficult to quickly connect and install the total station, thus prolonging the preparation time. At the same time, when disassembling after the operation, it is necessary to rotate in the opposite direction. If the threads wear after long-term use, or if improper operation during installation and disassembly causes twisting or excessive force, it is very easy to cause the threads to strip. This will not only damage the connection structure of the tripod or the total station, affecting the stability of subsequent use, but in severe cases, it may also cause the total station to fall off unexpectedly during installation. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a support device for engineering surveying. This device enables rapid docking, installation, and disassembly of a total station without the need for workpieces or threaded connections, shortening preparation time. It also avoids problems such as thread wear, stripping, and structural damage caused by improper operation. Furthermore, its stable connection significantly reduces the possibility of the total station accidentally falling off. This design improves upon or solves the problems associated with existing total station tripod connections, which require multiple rotations for alignment, hindering rapid docking and installation and extending preparation time. Additionally, disassembly after operation requires reverse rotation. If the threads wear after prolonged use, or if improper operation during installation or disassembly leads to twisting, misalignment, or excessive force, thread stripping is highly likely. This not only damages the connection structure of the tripod or total station, affecting subsequent stability, but in severe cases, may even cause the total station to accidentally fall off during installation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a support device for engineering surveying, comprising a mounting platform, telescopic legs, and a total station. The telescopic legs are three in number and are rotatably connected to the lower end of the mounting platform. The total station is positioned above the mounting platform and is movably connected to it. A docking groove is formed at the center of the upper surface of the mounting platform, and an annular mounting groove is formed on the upper surface of the mounting platform outside the docking groove. A fixing device is provided inside the annular mounting groove, and the total station is movably connected to the mounting platform through the fixing device. The fixing device includes clamping and snapping components and a linkage control mechanism. There are three clamping and snapping components, which are evenly arranged around the upper part of the annular mounting groove. The linkage control mechanism is located below the three clamping and snapping components.

[0005] In a preferred embodiment of this invention, the clamping and engaging assembly includes a positioning rod, a clamping head, and a pressure rod. There are two positioning rods, both of which are located inside the front side of the annular mounting groove. The front and rear ends of the two positioning rods are respectively fixedly connected to the front and rear inner walls of the front end of the annular mounting groove. The clamping head is sleeved on the surface of the two positioning rods and is slidably connected to the positioning rods. The rear end of the clamping head near the docking groove extends into the docking groove and is slidably connected to the mounting platform. The pressure rod is fixedly connected to the lower surface of the clamping head.

[0006] As a preferred embodiment of this utility model, a docking seat is fixedly connected to the lower surface of the total station. The docking seat corresponds to and is adapted to the docking groove. Three slots are evenly opened on the circumference of the docking seat. The three slots correspond to and are adapted to one end of the three clips that extend into the docking groove.

[0007] As a preferred embodiment of this utility model, an encapsulation plate is fixedly connected to the upper end of the annular mounting groove, and the upper surface of the encapsulation plate is flush with the upper surface of the mounting platform.

[0008] In a preferred embodiment of this utility model, the linkage control mechanism includes a linkage component and a control self-locking component. The linkage component is disposed at the lower end of the three pressure rods, and the control self-locking component is disposed on the left side of the lower end of the linkage component.

[0009] In a preferred embodiment of this utility model, the linkage includes a rotating ring, an arc-shaped extrusion groove, and a worm gear. The rotating ring is disposed inside the annular mounting groove and fitted onto the inner wall of the annular mounting groove, and is rotatably connected to the mounting platform. There are three arc-shaped extrusion grooves, each formed around the upper surface of the rotating ring and penetrating the rotating ring. The lower ends of the three pressure rods are respectively disposed inside the three arc-shaped extrusion grooves and are movably connected to the arc-shaped extrusion grooves. The worm gear is fixedly connected to the lower surface of the rotating ring and fitted onto the inner wall of the annular mounting groove, and is rotatably connected to the mounting platform.

[0010] In a preferred embodiment of this utility model, the self-locking control component includes a worm gear and a knob. The worm gear is located on the left side of the worm wheel and is meshed with the worm wheel. Both ends of the worm gear are rotatably connected to the mounting platform, and the rear end extends out of the mounting platform. The knob is fixedly connected to the rear end of the worm gear.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the coordinated use of an installation platform, telescopic legs, total station, docking groove, placement groove, fixing device, clamping and snap-fit ​​assembly, positioning rod, snap head, pressure rod, linkage control mechanism, linkage component, swivel ring, arc-shaped extrusion groove, worm gear, control self-locking component, worm, knob, docking seat, snap groove, and encapsulation plate, improves or solves to a certain extent the problems of existing total station tripod connection methods in actual use. These problems include the need for multiple rotations for alignment during threaded connections, making rapid docking and installation of the total station difficult and prolonging preparation time. Furthermore, disassembly after operation requires reverse rotation. If the threads wear down after long-term use, or if improper operation during installation or disassembly leads to twisting, misalignment, or excessive force, thread stripping is highly likely. This not only damages the connection structure of the bracket or total station, affecting subsequent stability, but in severe cases, may even cause the total station to accidentally detach during installation.

[0012] 2. This utility model, by setting up a clamping and snapping assembly, in which the double positioning rods achieve precise guidance and limiting of the snap head, and with the matching design of the snap head and the snap slot, ensures accurate installation and positioning of the total station. At the same time, the encapsulation plate can isolate external dust and impurities from entering the annular mounting groove, protect the internal components from contamination and damage, and extend the overall service life of the device.

[0013] 3. By setting up a control component, this utility model can achieve synchronous linkage control of three clamping and locking components through a single knob, and the self-locking characteristics of the worm gear and worm wheel ensure connection stability, which simplifies the operation process and prevents the equipment from loosening due to vibration, further improving the efficiency of disassembly and assembly and the safety of use. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the tripod support for the total station of this utility model; Figure 2 This is an exploded three-dimensional structural diagram of the tripod support for a total station. Figure 3 This is an exploded three-dimensional structural diagram of the packaging board; Figure 4 This is a schematic diagram of the exploded three-dimensional structure of the fixed device; Figure 5 This is a schematic diagram of the exploded three-dimensional structure of the linkage control mechanism.

[0015] In the diagram: 1. Mounting platform; 2. Telescopic support leg; 3. Total station; 4. Docking groove; 5. Placement groove; 6. Fixing device; 7. Clamping and snap-fit ​​assembly; 71. Positioning rod; 72. Clamp head; 73. Pressure rod; 8. Linkage control mechanism; 81. Linkage component; 811. Rotary ring; 812. Arc-shaped extrusion groove; 813. Worm gear; 82. Control self-locking component; 821. Worm; 822. Knob; 9. Docking seat; 10. Slot; 11. Encapsulation plate. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0019] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0020] Example 1 Reference Figure 1-5 This is the first embodiment of the present utility model, which provides a support device for engineering surveying, including a mounting platform 1, telescopic legs 2 and a total station 3. There are three telescopic legs 2, all of which are rotatably connected to the lower end of the mounting platform 1. The total station 3 is set above the mounting platform 1 and is movably connected to the mounting platform 1. A docking groove 4 is opened in the center of the upper surface of the mounting platform 1. An annular mounting groove 5 is opened on the upper surface of the mounting platform 1 outside the docking groove 4. A fixing device 6 is set inside the annular mounting groove 5. The total station 3 is movably connected to the mounting platform 1 through the fixing device 6. The fixing device 6 includes clamping and snapping components 7 and linkage control mechanism 8. There are three clamping and snapping components 7, which are evenly arranged around the upper part of the annular mounting groove 5. The linkage control mechanism 8 is located below the three clamping and snapping components 7.

[0021] Specifically, it features the advantages of quick assembly and disassembly of the total station 3, a secure connection that is not easily damaged, effectively shortens the preparation time for operation, and avoids the problems of easy stripping and structural damage caused by traditional threaded connections.

[0022] Furthermore, by inserting the docking seat 9 of the total station 3 into the docking slot 4 of the mounting platform 1, and using the linkage control mechanism 8 to drive the clamping and snapping assembly 7 in the annular mounting slot 5, the snapping structure cooperates with the snapping slot 10 of the docking seat 9, thereby achieving rapid fixing and disassembly of the total station 3 and the mounting platform 1.

[0023] Example 2 In the second embodiment of this utility model, the clamping and snapping assembly 7 includes a positioning rod 71, a snap head 72, and a pressure rod 73. There are two positioning rods 71, both of which are located inside the front side of the annular mounting groove 5. The front and rear ends of the two positioning rods 71 ​​are respectively fixedly connected to the front and rear inner walls of the front end of the annular mounting groove 5. The snap head 72 is sleeved on the surface of the two positioning rods 71 ​​and is slidably connected to the positioning rods 71. The snap head 72 extends into the interior of the docking groove 4 near the rear end of the docking groove 4 and is slidably connected to the mounting platform 1. The pressure rod 73 is fixedly connected to the lower surface of the snap head 72. A docking seat 9 is fixedly connected to the lower surface of the total station 3. The docking seat 9 corresponds to and is compatible with the docking groove 4. Three slots 10 are evenly opened around the circumference of the docking seat 9. The three slots 10 correspond to and are compatible with one end of the three clips 72 that extend into the docking groove 4. An encapsulation plate 11 is fixedly connected to the upper end of the annular mounting groove 5, and the upper surface of the encapsulation plate 11 is flush with the upper surface of the mounting platform 1.

[0024] Specifically, by setting up the clamping and snapping assembly 7, in which the double positioning rod 71 achieves precise guidance and limiting of the snap head 72, and with the matching design of the snap head 72 and the snap slot 10, the total station 3 is ensured to be installed and positioned accurately. At the same time, the encapsulation plate 11 can isolate external dust and impurities from entering the annular mounting groove 5, protect the internal components from contamination and damage, and extend the overall service life of the device.

[0025] Furthermore, when the rotating ring 811 rotates, the inner wall of the arc-shaped extrusion groove 812 will exert a radial extrusion force on the pressure rod 73. The pressure rod 73, under extrusion, will drive the clamp 72 fixedly connected to its upper end to slide along the positioning rod 71. The positioning rod 71 plays a guiding and limiting role for the clamp 72, ensuring that the clamp 72 can only move in the direction close to or away from the center of the docking groove 4. Finally, the ends of the three clamps 72 close to the docking groove 4 are simultaneously embedded into the three corresponding slots 10 of the docking seat 9, completing the rapid fixation of the total station 3 and the mounting platform 1. At the same time, the worm gear 813 and the worm 821 have a self-locking property, which can effectively prevent the rotating ring 811 from rotating in the opposite direction due to external vibration or accidental contact, ensuring that the extrusion force of the pressure rod 73 on the clamp 72 is continuously stable, thus allowing the clamp 72 to always be tightly fitted in the slot 10 of the docking seat 9, achieving a firm and loose connection between the total station 3 and the mounting platform 1.

[0026] Example 3 In the third embodiment of this utility model, the linkage control mechanism 8 includes a linkage component 81 and a control self-locking component 82. The linkage component 81 is disposed at the lower end of the three pressure rods 73, and the control self-locking component 82 is disposed on the left side of the lower end of the linkage component 81. The linkage component 81 includes a rotating ring 811, an arc-shaped extrusion groove 812, and a worm gear 813. The rotating ring 811 is located inside the annular mounting groove 5 and is fitted onto the inner wall of the annular mounting groove 5, and is rotatably connected to the mounting platform 1. There are three arc-shaped extrusion grooves 812, each of which is formed around the upper surface of the rotating ring 811 and passes through the rotating ring 811. The lower ends of the three pressure rods 73 are respectively located inside the three arc-shaped extrusion grooves 812 and are movably connected to the arc-shaped extrusion grooves 812. The worm gear 813 is fixedly connected to the lower surface of the rotating ring 811 and is fitted onto the inner wall of the annular mounting groove 5, and is rotatably connected to the mounting platform 1. The self-locking control component 82 includes a worm gear 821 and a knob 822. The worm gear 821 is located on the left side of the worm wheel 813 and is meshed with the worm wheel 813. Both the front and rear ends of the worm gear 821 are rotatably connected to the mounting platform 1, and the rear end extends out of the mounting platform 1. The knob 822 is fixedly connected to the rear end of the worm gear 821.

[0027] Specifically, by setting up control components, the three clamping and locking components 7 can be synchronously controlled by a single knob 822, and the self-locking characteristics of the worm gear 821 and worm wheel 813 ensure connection stability, which simplifies the operation process and prevents the equipment from loosening due to vibration, further improving the efficiency of disassembly and assembly and the safety of use.

[0028] Furthermore, rotating the knob 822 can drive the worm gear 821 to rotate. The worm gear 821 drives the worm wheel 813 to rotate synchronously with the rotating ring 811 through meshing transmission. When the arc-shaped extrusion groove 812 on the rotating ring 811 rotates with the rotating ring 811, it will generate radial extrusion force on the pressure rod 73 embedded in the groove, driving the pressure rod 73 to drive the clamp 72 to complete the locking and fixing. Reverse rotation of the knob 822 will cause the rotating ring 811 to rotate in the opposite direction. The arc-shaped extrusion groove 812 will extrude the pressure rod 73 in the opposite direction, causing the pressure rod 73 to drive the clamp 72 to disengage from the clamp 10. At the same time, the meshing structure of the worm gear 821 and worm wheel 813 can prevent the rotating ring 811 from accidentally reversing, ensuring the stability of the fixed state.

[0029] Working principle: During use and installation, the docking seat 9, fixed to the lower surface of the total station 3, is aligned and inserted into the docking groove 4. The docking seat 9 fits tightly against the inner wall of the docking groove 4. Due to the shape matching between the docking seat 9 and the docking groove 4, after the docking seat 9 is inserted, the three slots 10 will correspond to the positions of the three clips 72. Then, the worm 821 is rotated by the knob 822. As the worm 821 rotates, it drives the worm wheel 813, which meshes with it, to rotate synchronously. Since the worm wheel 813 is fixedly connected to the lower surface of the rotating ring 811, the rotating ring 811 will rotate together with the worm wheel 813 on the inner wall of the annular mounting groove 5. The surface is provided with three arc-shaped extrusion grooves 812, and the lower ends of the three pressure rods 73 are respectively embedded in the three arc-shaped extrusion grooves 812. When the rotating ring 811 rotates, the inner wall of the arc-shaped extrusion groove 812 will exert a radial extrusion force on the pressure rod 73. At the same time, the worm wheel 813 and the worm 821 have a self-locking property, which can effectively prevent the rotating ring 811 from rotating in the opposite direction due to external vibration or accidental contact, ensuring that the extrusion force of the pressure rod 73 on the clamp 72 is continuously stable, thereby allowing the clamp 72 to always be tightly embedded in the clamp groove 10 of the docking seat 9, realizing a firm and loose connection between the total station 3 and the mounting platform 1. The squeezed pressure bar 73 will cause the clamp 72 fixedly connected to its upper end to slide along the positioning rod 71. The positioning rod 71 guides and limits the clamp 72, ensuring that the clamp 72 can only move in the direction close to or away from the center of the docking groove 4. Finally, the ends of the three clamps 72 close to the docking groove 4 are simultaneously embedded into the three corresponding clamps 10 of the docking seat 9, completing the rapid fixation of the total station 3 and the mounting platform 1. If the total station 3 needs to be disassembled, rotate the knob 822 in the opposite direction. The worm gear 821 drives the worm wheel 813 and the rotating ring 811 to rotate in the opposite direction. The arc-shaped extrusion groove 812 extrudes the pressure rod 73 in the opposite direction. The pressure rod 73 pushes the chuck 72 to move away from the docking groove 4 along the positioning rod 71, so that the chuck 72 is disengaged from the chuck groove 10. Then the total station 3 together with the docking seat 9 can be taken out from the docking groove 4. The whole operation does not require repeated rotation and alignment, which effectively shortens the installation and disassembly time, and avoids the problems of stripping and structural damage that are prone to occur in threaded connections.

[0030] In summary, by using the mounting platform 1, telescopic legs 2, total station 3, docking groove 4, placement groove 5, fixing device 6, clamping and snap-fit ​​assembly 7, positioning rod 71, snap head 72, pressure rod 73, linkage control mechanism 8, linkage component 81, rotating ring 811, arc-shaped extrusion groove 812, worm gear 813, control self-locking component 82, worm 821, knob 822, docking seat 9, snap-fit ​​groove 10, and encapsulation plate 11, rapid docking, installation, and disassembly of the total station can be achieved without workpieces or threaded connections. This shortens preparation time and avoids problems such as thread wear, stripping, and structural damage caused by improper operation. Furthermore, the stable connection significantly reduces the possibility of the total station accidentally falling off.

[0031] The telescopic support 2, total station 3, worm gear 813 and worm 821 used in this application can be additionally equipped with protective measures of common knowledge in this technical field under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.

[0032] It should be noted that the telescopic outrigger 2, the total station 3, the worm gear 813 and the worm 821 are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method and other methods of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0033] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0034] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0035] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A support device for engineering surveying, comprising a mounting platform (1), telescopic legs (2), and a total station (3), wherein the number of telescopic legs (2) is three, and each is rotatably connected to the lower end of the mounting platform (1) for one revolution; the total station (3) is positioned above the mounting platform (1) and is movably connected to the mounting platform (1), characterized in that: The mounting platform (1) has a docking groove (4) at the center of its upper surface. The mounting platform (1) outside the docking groove (4) has an annular placement groove (5) on its upper surface. A fixing device (6) is installed inside the annular placement groove (5). The total station (3) is movably connected to the mounting platform (1) through the fixing device (6). The fixing device (6) includes a clamping and snapping assembly (7) and a linkage control mechanism (8). There are three clamping and snapping assemblies (7), which are evenly arranged around the upper part of the annular mounting groove (5). The linkage control mechanism (8) is located below the three clamping and snapping assemblies (7).

2. The support device for engineering surveying according to claim 1, characterized in that: The clamping and snapping assembly (7) includes a positioning rod (71), a snap head (72), and a pressure rod (73). There are two positioning rods (71), both of which are located inside the front side of the annular mounting groove (5). The front and rear ends of the two positioning rods (71) are fixedly connected to the front and rear inner walls of the front end of the annular mounting groove (5), respectively. The snap head (72) is sleeved on the surface of the two positioning rods (71) and is slidably connected to the positioning rods (71). The snap head (72) extends into the docking groove (4) near the rear end of the docking groove (4) and is slidably connected to the mounting platform (1). The pressure rod (73) is fixedly connected to the lower surface of the snap head (72).

3. The support device for engineering surveying according to claim 2, characterized in that: The lower surface of the total station (3) is fixedly connected to a docking seat (9). The docking seat (9) corresponds to and is adapted to the docking groove (4). Three slots (10) are evenly opened on the circumference of the docking seat (9). The three slots (10) correspond to and are adapted to one end of the three clips (72) that extend into the docking groove (4).

4. The support device for engineering surveying according to claim 1, characterized in that: An encapsulation plate (11) is fixedly connected to the upper end of the annular mounting groove (5), and the upper surface of the encapsulation plate (11) is flush with the upper surface of the mounting platform (1).

5. The support device for engineering surveying according to claim 2, characterized in that: The linkage control mechanism (8) includes a linkage component (81) and a control self-locking component (82). The linkage component (81) is located at the lower end of the three pressure rods (73), and the control self-locking component (82) is located on the left side of the lower end of the linkage component (81).

6. The support device for engineering surveying according to claim 5, characterized in that: The linkage (81) includes a rotating ring (811), an arc-shaped extrusion groove (812), and a worm gear (813). The rotating ring (811) is disposed inside the annular mounting groove (5) and sleeved on the inner wall of the annular mounting groove (5), and is rotatably connected to the mounting platform (1). There are three arc-shaped extrusion grooves (812), each of which is opened around the upper surface of the rotating ring (811) and passes through the rotating ring (811). The lower ends of the three pressure rods (73) are respectively disposed inside the three arc-shaped extrusion grooves (812) and are movably connected to the arc-shaped extrusion grooves (812). The worm gear (813) is fixedly connected to the lower surface of the rotating ring (811) and sleeved on the inner wall of the annular mounting groove (5), and is rotatably connected to the mounting platform (1).

7. The support device for engineering surveying according to claim 6, characterized in that: The self-locking control component (82) includes a worm (821) and a knob (822). The worm (821) is located on the left side of the worm wheel (813) and is meshed with the worm wheel (813). Both ends of the worm (821) are rotatably connected to the mounting platform (1), and the rear end extends out of the mounting platform (1). The knob (822) is fixedly connected to the rear end of the worm (821).

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