A portable measuring device for architectural design

Abstract

This invention relates to a portable architectural design measuring device, comprising a support and a measuring instrument. The support includes a head and at least two legs rotatably connected to the bottom of the head. A protective cover is provided on the head, and at least one push rod is provided between the protective cover and the head. The push rod can drive the protective cover to move vertically through its own rotation. The advantages of this invention are: when the legs are retracted, the adjusting shaft rotates in the opposite direction under the action of the sleeve rod, lead screw nut, lead screw, and first universal joint, shortening the multi-stage telescopic rod, causing the protective cover to move down and cover the measuring instrument, thus protecting it. The setup of the device and the movement of the protective cover are linked, requiring no additional steps compared to existing methods. When changing measurement points, the operator simply retracts the device and carries it on their back; the protective cover automatically covers the outside of the measuring instrument, providing protection and effectively preventing measurement inaccuracies caused by external factors.

Description

Technical Field

[0001] This invention relates to the field of architectural design technology, and in particular to a portable measuring device for architectural design. Background Technology

[0002] When conducting architectural design surveying, measuring devices such as levels, theodolites, and total stations are frequently used. During the surveying process, the measuring instruments are mounted on suitable supports or tripods, followed by steps such as rough leveling, aiming, fine leveling, and reading.

[0003] Because measuring instruments require good protection, they are generally stored in individual packaging boxes. When needed, they are removed and mounted on a tripod. When changing measurement locations, the standard procedure is to disassemble the measuring instrument and place it in its individual packaging box, then carry the tripod and measuring instrument separately to the new location for installation, leveling, and measurement. However, due to the large workload of surveying, surveyors often fail to disassemble the measuring device when moving it, either to save time or out of negligence, and simply carry the tripod on their backs. This exposes the measuring instrument to the elements, making it vulnerable to wind, vibration, and even minor impacts, which can directly affect the accuracy of the data, including the line of sight, level tube axis, and vertical / horizontal axes. Dust, moisture, and sand can also enter the instrument, affecting its lifespan and accuracy. To address these disassembly and assembly issues, some studies have proposed easily foldable architectural design measuring devices.

[0004] For example, a portable outdoor measuring device for architectural design, disclosed in CN118980361B, uses a bracket with legs featuring a three-fold structure. When changing measurement positions, the legs can be folded and flipped upwards to form a protective box, enclosing the measuring instrument. The bracket and measuring instrument can then be carried to the target location without disassembling the instrument. However, the leg structure is complex. Changing measurement positions requires folding and flipping the legs to protect the instrument, and upon reaching the new position, the legs must be folded back up for leveling and measurement, making the operation cumbersome. Another example is a portable architectural measuring instrument disclosed in CN219319424U, which uses four flip-up protective plates on its bracket. These plates can be flipped to protect the measuring instrument when needed. However, its use requires separate operation of the protective plates, making the operation still relatively complex. Summary of the Invention

[0005] This invention provides a portable architectural design measuring device that solves the problem in the prior art where the measuring instrument needs to be disassembled and reassembled when changing measuring points, or where it still requires complex operations even if disassembly and reassembly are not required.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a portable architectural design measuring device, including a support and a measuring instrument, wherein the support includes a frame head and at least two legs rotatably connected to the bottom of the frame head, a protective cover is provided on the frame head, and at least one push rod is provided between the protective cover and the frame head, the push rod being able to drive the protective cover to move vertically through its own rotation; At least one of the outriggers is rotatably connected to a sleeve rod on its inner side, and a lead screw nut is fixedly connected to the end of the sleeve rod. The lead screw nut is threadedly connected to a lead screw, and the lead screw is connected to a push rod through a first universal joint. The outriggers are adjustable in length, and a synchronous transmission assembly is provided between adjacent outriggers to enable all outriggers to expand or retract synchronously. When the outriggers expand or retract, the lead screw is driven to rotate through the sleeve rod, which in turn drives the push rod to rotate through the first universal joint, causing the protective cover to move up or down.

[0007] Preferably, the push rod includes a fixed sleeve fixedly connected to the frame head, an adjustment shaft rotatably connected to the fixed sleeve, and a moving rod threadedly connected to the adjustment shaft. The top end of the moving rod is fixedly connected to the protective cover, and the adjustment shaft is connected to the lead screw through a first universal joint.

[0008] Preferably, the outrigger is rotatably connected to the bottom of the frame head via a pivot, and the synchronous transmission assembly includes a transmission rod rotatably connected to the bottom surface of the frame head and a second universal joint disposed between the transmission rod and the pivot of the outrigger.

[0009] The number of the push rods is the same as the number of the outriggers, and all the outriggers are rotatably connected to a sleeve rod on their inner side.

[0010] Preferably, the protective cover includes a mounting ring, a plurality of protective posts fixedly connected to the mounting ring, and a top plate fixedly connected to the top of the protective posts. The mounting ring is fixedly connected to the moving rod of the jacking rod.

[0011] Preferably, the protective cover further includes an elastic protective strip disposed on the outside of the protective post, and the protective post is a telescopic rod with adjustable length.

[0012] Preferably, the mounting ring and protective post are made of stainless steel or aluminum alloy.

[0013] Preferably, the lead screw is a ball screw or a roller screw.

[0014] Compared to existing technologies, this invention, through the use of a multi-stage telescopic rod, adjusting shaft, protective cover, adjusting rod, lead screw, lead screw nut, and first universal joint, allows for several advantages. When the outriggers are extended, the bottom end of the sleeve rod moves with the outriggers. Under the tension of the first universal joint, the lead screw nut displaces relative to the lead screw, causing the lead screw to rotate. The lead screw, through the first universal joint, drives the push rod to rotate, pushing the protective cover upwards. When the outriggers are retracted, the push rod rotates in the opposite direction under the influence of the sleeve rod, lead screw nut, lead screw, and first universal joint. The push rod causes the protective cover to move downwards and cover the measuring instrument, protecting it. The installation of the device and the movement of the protective cover are linked. The installation operation requires no additional steps compared to existing methods. When changing measurement points, the operator simply retracts the device and carries it on their back; the protective cover automatically covers the measuring instrument, providing protection and effectively preventing measurement inaccuracies caused by external factors. Measurement work can continue without disassembling or reassembling the measuring instrument or performing complex operations. Attached Figure Description

[0015] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second perspective structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 This is a side view of the outriggers of the present invention after they have been deployed; Figure 5 This is a partial cross-sectional view of the outriggers of the present invention after they have been deployed. Figure 6 This is a cross-sectional structural diagram of the push rod of the present invention; Figure 7 This is a partial cross-sectional view of the protective cover of the present invention; Figure 8 This is a schematic diagram of a structure according to an embodiment of the present invention; Figure 9 For the present invention Figure 8 A schematic diagram of the synchronous transmission component in the embodiment shown.

[0016] In the diagram: 1. Frame head; 2. Measuring instrument; 3. Push rod; 301. Fixed sleeve; 302. Moving rod; 303. Adjustment shaft; 4. Protective cover; 401. Mounting ring; 402. Protective column; 403. Top plate; 404. Elastic protective belt; 5. Outrigger; 6. Sleeve rod; 7. Lead screw; 8. Lead screw nut; 9. First universal joint; 10. Back strap; 11. Synchronous transmission assembly; 1101. Transmission rod; 1102. Second universal joint. Detailed Implementation

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] like Figures 1 to 6 As shown, the present invention provides a portable measuring device for architectural design, including a support and a measuring instrument 2. The support includes a frame head 1 and at least two legs 5 rotatably connected to the bottom of the frame head 1. A protective cover 4 is provided on the frame head 1, and at least one push rod 3 is provided between the protective cover 4 and the frame head 1. The push rod 3 can drive the protective cover 4 to move vertically by rotating itself. A sleeve rod 6 is rotatably connected to the inner side of at least one leg 5, and a lead screw nut 8 is fixedly connected to the end of the sleeve rod 6. The lead screw nut 8 is threadedly connected to a lead screw 7, and the lead screw 7 is connected to the push rod 3 through a first universal joint 9. The legs 5 are adjustable in length, and a synchronous transmission assembly 11 is provided between adjacent legs 5 to enable all legs 5 to expand or retract synchronously. When the legs 5 expand or retract, the sleeve rod 6 drives the lead screw 7 to rotate, which in turn drives the push rod 3 to rotate through the first universal joint 9, causing the protective cover 4 to move upward or downward.

[0019] Specifically, the support bracket is used to support the measuring instrument 2, providing a stable platform for its placement and ensuring it is at a suitable height for easy measurement work. The support bracket can be a tripod, a common type in existing technology. Specifically, the bracket head 1 provides a platform for the measuring instrument 2. As in existing technology, the bracket head 1 should have a centering screw to secure the measuring instrument 2 to it. The legs 5 support the bracket head 1, and their angle and / or length can be adjusted to maintain its horizontal position. Three legs 5 are typically used, similar to a tripod. If necessary, two legs can also be used, but these legs must ensure the stability of the storage cylinder 1. Supports on the plane intersecting the two legs are needed at the bottom of the legs to assist in the support, such as using T-shaped legs. The legs 5 are preferably telescopic, a common type in existing technology. The telescopic method can refer to the telescopic legs of existing tripods, or other telescopic methods are also possible; this application does not impose any restrictions. The bottom of the outrigger 5 should be equipped with an anti-slip structure. This could be a fixed toe on the bottom of the outrigger of a commonly used tripod, or an anti-slip sleeve on the bottom of the outrigger 5, to improve the stability of the outrigger 5 when providing support for the storage cylinder 1. The measuring instrument 2 is the instrument used for architectural design surveying, such as a level, theodolite, or total station.

[0020] The jacking rod 3 is used to drive the protective cover 4 to move vertically. The jacking rod 3 can be a manually operated, rotary-driven multi-stage telescopic rod, and its length can be adjusted by rotating the control shaft 303. Alternatively, it can be a threaded post that is threadedly connected to the protective cover 4, and this threaded post should be rotatably connected to the headstock 1. The jacking rod 3 should have sufficient strength to prevent it from bending and becoming unusable when subjected to lateral impact. Carbon steel or alloy steel is preferred. The protective cover 4 is used to cover the outside of the measuring instrument 2 for protection when it is not in use. The volume of the protective cover 4 should be as small as possible while still covering the measuring instrument 2, so as to reduce the overall size of the device and improve its portability.

[0021] The bottom end of the sleeve rod 6 is rotatably connected to the outrigger 5, and the top end is connected to the adjusting shaft 303 via a lead screw 7 and a first universal joint 9, allowing both ends of the sleeve rod 6 to rotate. Therefore, when the outrigger 5 changes angle, the sleeve rod 6 can also change angle accordingly, adapting to the movement of the outrigger 5. It should be noted that when using a telescopic outrigger, the sleeve rod 6 should be connected to the fixed part of the telescopic outrigger, i.e., the part directly connected to the frame head 1, to prevent the extension and retraction of the outrigger 5 from causing the sleeve rod 6 to move.

[0022] The lead screw 7 and lead screw nut 8 cooperate to convert the planar movement of the sleeve 6 into the rotation of the lead screw 7. Therefore, this lead screw-lead screw nut mechanism is a reverse transmission mechanism. Thus, this lead screw-lead screw nut mechanism should have high reverse transmission efficiency; ball screws or precision trapezoidal lead screws with low friction are preferred. The lead screw 7 is connected to the push rod 3 via a first universal joint 9. A universal joint is a mechanical transmission component that enables power transmission between two shafts with different included angles. It is hinged to the universal joint forks at both ends via a cross shaft, allowing torque and rotational motion to be transmitted even when the included angle of the driving and driven shafts changes within a certain range. This ensures stable transmission between the lead screw 7 and the push rod 3 when the lead screw 7 follows the sleeve 6 in changing angles. A ball cage type universal joint is preferred, as it can transmit power over a larger angle range, adapting to the needs of the device. The first universal joint 9 can be connected to the lead screw 7 and the push rod 3 through spline connection, key-fit set screw / lock nut connection, interference fit connection, welding connection, flange connection, etc.

[0023] In addition, to facilitate carrying by staff, a shoulder strap 10 can be installed on the outrigger 5 or the headstock 1. The shoulder strap 10 allows staff to move the carrying device, similar to a backpack shoulder strap. The shoulder strap 10 can be an adjustable auxiliary strap, specifically using a D-ring buckle adjustment structure or a combination of trapezoidal buckles and mortise buckles. Preferably, the shoulder strap 10 is arranged vertically between the headstock 1 and the outrigger. This vertical arrangement ensures that the device remains upright when carried by the staff, thus avoiding inaccuracies caused by tilting or tipping of the measuring instrument.

[0024] In practical use, the following steps are included: S1. Move the device to the required measurement point, unfold all the support legs 5 and adjust the support legs 5 to make the top surface of the support roughly horizontal. During the unfolding of the support legs 5, the bottom end of the sleeve rod 6 moves with the support legs 5. Under the pulling action of the first universal joint 9, the screw nut 8 is displaced relative to the screw 7, causing the screw 7 to rotate. The screw 7 drives the push rod 3 to rotate through the first universal joint 9. The push rod 3 pushes the protective cover 4 upward, so that the frame head 1 is exposed. Install the measuring instrument 2 on the frame head 1 and perform leveling and measurement operations. S2. After the measurement of the points mentioned in S1 is completed, the support leg 5 is retracted. During the retraction of the support leg 5, the push rod 3 rotates in the opposite direction to that in S1 under the drive of the sleeve rod 6, the lead screw nut 8, the lead screw 7 and the first universal joint 9. The push rod 3 drives the protective cover 4 to move down and cover the measuring instrument 2 to protect it. S3. Move the carrying device to the subsequent measurement point, repeat S1 and S2 until all measurement points have been measured. Remove the measuring instrument 2 from the headstock 1 and store it separately. Then fold up the support leg 5 and store it.

[0025] like Figure 6 As shown, in order to reduce the distance between the protective cover and the frame head and improve the protective effect, preferably, the push rod 3 includes a fixed sleeve 301 fixedly connected to the frame head 1, an adjustment shaft 303 rotatably connected to the fixed sleeve 301, and a moving rod 302 threadedly connected to the adjustment shaft 303. The top end of the moving rod 302 is fixedly connected to the protective cover 4, and the adjustment shaft 303 is connected to the lead screw 7 through the first universal joint 9.

[0026] Specifically, the fixed sleeve 301, the movable rod 302, and the adjusting shaft 303 constitute the basic structure of a manual telescopic rod. The fixed sleeve 301, as a fixed component, is fixedly installed on the frame head 1. The movable rod 302 can have several stages, serving as the main component for the extension and retraction of the multi-stage telescopic rod. Each section of the rod should be equipped with a rotating locking mechanism at its connection point. The movable rod 302 is housed within the fixed sleeve 301 and extends or retracts with the rotation of the adjusting shaft 303. For details, refer to existing multi-stage telescopic rods where the length is adjusted by manual rotation.

[0027] like Figures 8 to 9 As shown, in order to achieve the purpose of synchronous rotation of multiple outriggers and simplify the erection process, preferably, the outrigger 5 is rotatably connected to the bottom of the frame head 1 via a rotating shaft. The synchronous transmission assembly 11 includes a transmission rod 1101 rotatably connected to the bottom surface of the frame head 1 and a second universal joint 1102 disposed between the transmission rod 1101 and the rotating shaft of the outrigger 5.

[0028] Specifically, when a certain outrigger 5 rotates, under the action of its rotating shaft and the synchronous transmission assembly 11, adjacent outriggers 5 rotate synchronously in the same direction, realizing the synchronous deployment or retraction of all outriggers 5. A transmission rod 1101 is set on the frame head 1, and a second universal joint 1102 is set in cooperation to realize the transmission between the rotating shafts of adjacent outriggers 5. The second universal joint 1102 is preferably a ball cage type universal joint, which can transmit within a large angle range and adapt to the transmission needs between outriggers 5.

[0029] Alternatively, the second universal joint 1102 can be a bevel gear set consisting of two bevel gears that mesh with each other and are respectively set on the shaft of the transmission rod 1101 and the support leg 5. However, the angle of the transmission surface of the bevel gear set needs to be adapted to the angle between the shaft of the support leg 5 and the transmission rod 1001.

[0030] In order to achieve the purpose of providing stable support and enabling balanced and stable movement of the protective sleeve, preferably, the number of push rods 3 is the same as the number of legs 5, and all legs 5 are rotatably connected to the inner side of the sleeve rod 6.

[0031] Specifically, by setting multiple jacking rods 3, which provide support to the protective cover 4 from different positions, the protective cover 4 becomes more stable. Each support leg 5 is equipped with a sleeve rod 6, and the drive structure composed of multiple sleeve rods 6, lead screws 7, etc., synchronously drives multiple jacking rods 3 to perform synchronous extension and retraction movements, so that the protective cover 4 is driven synchronously at multiple points, thereby making its movement more balanced and stable.

[0032] It should be noted that since all outriggers 5 have sleeve rods 6 on their inner sides, attention should be paid to the problem of interference between multiple sleeve rods 6. This can be avoided by adjusting the setting height of each sleeve rod 6.

[0033] like Figures 1 to 2 and Figure 7 As shown, in order to achieve both the protective performance of the protective cover and the portability of the device, preferably, the protective cover 4 includes a mounting ring 401, a plurality of protective columns 402 fixedly connected to the mounting ring 401, and a top plate 403 fixedly connected to the top of the protective columns 402. The mounting ring 401 is fixedly connected to the moving rod 302 of the push rod 3.

[0034] Specifically, the mounting ring 401 provides bottom constraint for the protective columns 402. Several protective columns 402, forming the main protective structure of the protective cover 4, are evenly distributed circumferentially on the mounting ring 401. When the protective cover 4 covers the measuring instrument 2, the protective columns 402 surround the outside of the measuring instrument 2, protecting it. The top plate 403 supports the protective columns 402 from the top and also protects the measuring instrument 2 from the top. It also isolates rain and snow, preventing rainwater from directly falling onto the measuring instrument 2 and affecting it during measurement work. In summary, both the mounting ring 401 and the protective columns 402 should have high strength to prevent deformation under stress; high-strength aluminum alloy is preferred. The top plate 403 is preferably made of a material with good waterproof performance, but aluminum alloy can also be used.

[0035] like Figures 1 to 2 and Figure 7 As shown, in order to improve the protective effect and reduce the size of the device, preferably, the protective cover 4 also includes an elastic protective strip 404 set on the outside of the protective post 402, and the protective post 402 adopts a telescopic rod with adjustable length.

[0036] Specifically, an elastic protective strip 404 is installed on the outside of the protective column 402 to isolate small particles such as dust, preventing them from entering the protective cover 4 and adhering to the measuring instrument 2, thus avoiding any impact. Simultaneously, the protective column 402 uses an adjustable telescopic rod. When the protective cover 4 is not covering the measuring instrument 2, its internal support is lacking. Under the weight of the top plate 403, the protective column 402 retracts to its shortest length, reducing the overall volume of the device and improving its portability.

[0037] In order to achieve the protective effect of the protective cover and reduce the impact of external impact on the measuring instrument, preferably, the mounting ring 401 and the protective post 402 are both made of stainless steel or aluminum alloy.

[0038] Specifically, the mounting ring 401 and protective post 402, as the main structure of the protective cover 4, bear the primary protective function. Both should be able to withstand conventional external impacts without deformation. Therefore, the selection of materials for both should prioritize strength. Stainless steel and aluminum alloy are both commonly used and suitable materials for rods in engineering, offering high strength. Specifically, 304 stainless steel or 316L stainless steel can be selected, with a yield strength fy≈205MPa and a tensile strength fu≥515MPa. For aluminum alloy, 6061-T6 aluminum alloy can be selected, with a yield strength fy=240MPa and a tensile strength fu=260MPa. Both are sufficient to withstand conventional impacts, and their processing technology is mature and cost-effective. Aluminum alloy also possesses lightweight characteristics, reducing the burden on workers carrying the equipment and simplifying measurement work.

[0039] In order to enable the outriggers to open and close smoothly and drive the lead screw and control shaft to rotate smoothly, preferably, the lead screw 7 is a ball screw or roller screw.

[0040] Specifically, the core of a ball screw is a helical drive pair, whose motion conversion relationship is inherently bidirectional. In forward transmission, the screw rotates actively—the balls roll along the thread raceway—pushing the nut into linear motion (high mechanical energy conversion efficiency); in reverse transmission, the nut is actively pulled into linear motion—the balls roll in the opposite direction along the raceway—driving the screw to rotate. During reverse transmission, the linear driving force of the nut only needs to overcome minimal rolling friction resistance and the screw's rotational inertia, resulting in extremely low energy loss. Therefore, the transmission process is smooth and without jamming. Ball screws are manufactured with high precision (typically C1~C10 precision grade), and the radius of curvature and lead error of the thread raceway are strictly controlled. This ensures uniform contact between the balls and raceway during reverse transmission, preventing resistance fluctuations due to localized stress concentration. The good coaxiality of the nut and screw eliminates interference caused by radial offset, further enhancing the smoothness of reverse transmission. The lead screw 7 is made of ball screw or roller screw, which allows it to rotate smoothly when the sleeve rod 6 pushes or pulls the lead screw nut 8 to move, and then smoothly drives the control shaft 303 to rotate through the first universal joint 9.

[0041] In order to facilitate the movement of the device by staff and ensure that the status of the outriggers does not change during the movement of the device, preferably, the outriggers 5 are rotatably connected to the bottom surface of the frame head 1 via a damping shaft.

[0042] Specifically, the outrigger 5 is rotatably connected to the bottom surface of the headstock 1 via a damping pivot. The damping pivot is a mechanical connector that provides controllable damping force for rotational movement. Its core function is to ensure uniform movement, arbitrary angle suspension, and buffering and noise reduction during component rotation and opening / closing (such as flaps, hinges, and supports), preventing rapid opening / closing, impact noises, or positioning misalignment caused by gravity or external forces. Its core principle is to convert rotational kinetic energy into heat energy dissipation through mechanical friction, fluid damping, and magnetic damping, achieving precise control of the damping effect. The damping pivot ensures that the outrigger 5 cannot change its state under gravity, allowing it to remain folded when the worker carries the device, eliminating the need for additional straps and making it more convenient to use.

[0043] Compared to existing technologies, this invention, through the arrangement of a push rod 3, an adjusting shaft 303, a protective cover 4, an adjusting rod 6, a lead screw 7, a lead screw nut 8, and a first universal joint 9, allows for the following structure: When the outrigger 5 is extended, the bottom end of the sleeve rod 6 moves with the outrigger 5. Under the pulling action of the first universal joint 9, the lead screw nut 8 is displaced relative to the lead screw 7, causing the lead screw 7 to rotate. The lead screw 7, through the first universal joint 9, drives the push rod 3 to rotate, pushing the protective cover 4 upward. When the outrigger 5 is retracted, the push rod 3, driven by the sleeve rod 6, the lead screw nut 8, the lead screw 7, and the first universal joint 9, rotates in the opposite direction. The push rod 3 causes the protective cover 4 to move downward and cover the measuring instrument 2, protecting it. The installation of the device is linked to the movement of the protective cover 4. The installation operation requires no additional steps compared to existing methods. When changing measurement points, the operator simply folds up the device and carries it on their back; the protective cover automatically covers the outside of the measuring instrument to protect it, effectively preventing measurement inaccuracies caused by external factors. Measurement work can continue without disassembling or reassembling the measuring instrument or performing any complicated operations.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable architectural design measuring device, comprising a support and measuring instruments, the support including a head and at least two legs rotatably connected to the bottom of the head, characterized in that, A protective cover is provided on the frame head, and at least one push rod is provided between the protective cover and the frame head. The push rod can drive the protective cover to move vertically by rotating itself. At least one of the outriggers is rotatably connected to a sleeve rod on its inner side, and a lead screw nut is fixedly connected to the end of the sleeve rod. The lead screw nut is threadedly connected to a lead screw, and the lead screw is connected to a push rod via a first universal joint. The outriggers are adjustable in length, and a synchronous transmission assembly is provided between adjacent outriggers to enable all outriggers to expand or retract synchronously. When the outriggers expand or retract, the lead screw is driven to rotate through the sleeve rod, which in turn drives the push rod to rotate through the first universal joint, causing the protective cover to move up or down.

2. The portable architectural design measuring device according to claim 1, characterized in that: The jacking rod includes a fixed sleeve fixedly connected to the frame head, an adjustment shaft rotatably connected to the fixed sleeve, and a moving rod threadedly connected to the adjustment shaft. The top end of the moving rod is fixedly connected to the protective cover, and the adjustment shaft is connected to the lead screw through a first universal joint.

3. The portable architectural design measuring device according to claim 1, characterized in that: The outrigger is rotatably connected to the bottom of the frame head via a pivot. The synchronous transmission assembly includes a transmission rod rotatably connected to the bottom surface of the frame head and a second universal joint disposed between the transmission rod and the pivot of the outrigger.

4. The portable architectural design measuring device according to claim 3, characterized in that: The number of the push rods is the same as the number of the outriggers, and all the outriggers are rotatably connected to a sleeve rod on their inner side.

5. The portable architectural design measuring device according to claim 2, characterized in that: The protective cover includes a mounting ring, several protective columns fixedly connected to the mounting ring, and a top plate fixedly connected to the top of the protective columns. The mounting ring is fixedly connected to the moving rod of the jacking rod.

6. The portable architectural design measuring device according to claim 5, characterized in that: The protective cover also includes an elastic protective strip set on the outside of the protective post, and the protective post adopts a telescopic rod with adjustable length.

7. The portable architectural design measuring device according to claim 5, characterized in that: The mounting ring and protective post are both made of stainless steel or aluminum alloy.

8. The portable architectural design measuring device according to claim 1, characterized in that: The lead screw is either a ball screw or a roller screw.

Images