Precise positioning device for hoisting and installing prefabricated components
By using a precise positioning device for hoisting and installing prefabricated components, and by utilizing movable supports and horizontal adjustment mechanisms, combined with clamping arms and laser rangefinders, the swaying problem during the hoisting process of prefabricated components was solved, thereby improving the stability and safety of construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE SECOND ENG COMPANY OF CCCC FOURTH HARBOR ENG
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-29
AI Technical Summary
In the hoisting operation of precast components, the existing technology has problems of high construction difficulty and difficulty in ensuring safety, mainly because precast components are prone to swaying during the hoisting process and are severely affected by tides and waves.
A precise positioning device for hoisting and installing prefabricated components is adopted, including a movable support mechanism, a horizontal adjustment mechanism, and a hoisting mechanism. Combined with a base, clamping arms, lifting components, and a laser rangefinder, the stable movement and precise positioning of the prefabricated components are achieved through the coordinated use of these components.
This improved the stability and installation accuracy of precast components during hoisting, reduced the impact of tides and waves, and ensured construction safety and efficiency.
Smart Images
Figure CN224298754U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated component installation technology, specifically to a precise positioning device for hoisting and installing prefabricated components. Background Technology
[0002] The use of precast components is becoming increasingly widespread in construction, for example, in wharf construction. The existing construction method for wharves typically involves: first, driving multiple foundation piles to the riverbed or seabed; then, installing precast hollow pile caps on top of the piles; and precasting multiple rows of longitudinal beams and transverse beams that form a grid-like connection between the pile caps; finally, laying precast panels between the longitudinal and transverse beams. However, the precast components used to construct wharves (such as precast hollow pile caps) are usually lifted and hoisted using large floating cranes during construction. Construction workers need to reach the work site by water and wade through the water. Due to the influence of tides and waves, the precast components are prone to swaying during lifting and hoisting operations, which not only increases the difficulty of construction but also makes it difficult to guarantee the safety of construction workers. Utility Model Content
[0003] The purpose of this utility model is to provide a precise positioning device for the hoisting and installation of precast components, which effectively solves the technical problems that existing precast components are prone to swaying during hoisting operations, resulting in high construction difficulty and inability to ensure construction safety.
[0004] To solve the above-mentioned technical problems, this utility model provides a precise positioning device for hoisting and installing prefabricated components, including two movable support mechanisms, a horizontal adjustment mechanism, and a hoisting mechanism; the two ends of the horizontal adjustment mechanism are respectively set at the upper ends of the two movable support mechanisms; the hoisting mechanism is set at the bottom of the horizontal adjustment mechanism; the hoisting mechanism includes a base, two clamping arms, a lifting assembly, and a laser rangefinder; the base is connected to the bottom of the horizontal adjustment mechanism; the two clamping arms are slidably connected to the bottom of the base, and the two clamping arms can move relative to the base in a direction that approaches or moves away from each other; the lifting assembly is assembled at the bottom of the base and located between the two clamping arms; the laser rangefinder is set at the center of the bottom of the base.
[0005] Preferably, it also includes two temporary mounting frames, which are set on both sides of the width of the proposed wharf area; the upper end of one temporary mounting frame is provided with a slide rail, and the pulley of the movable support mechanism is slidably connected to the slide rail.
[0006] Preferably, the base has two symmetrical sliding grooves at its bottom; a bidirectional lead screw is rotatably connected inside the base; a first drive motor for driving the bidirectional lead screw to rotate is provided on the outer wall of the base; one end of a clamping arm is located inside the base and is threadedly connected to the bidirectional lead screw, and the other end passes through the sliding groove and extends downward to the bottom of the base.
[0007] Preferably, one clamping arm includes an electric telescopic rod and a clamping plate; one end of the electric telescopic rod is threaded to a bidirectional lead screw, and the other end passes through a slide groove and extends downward to below the base; one end of the clamping plate is connected to the end of the electric telescopic rod away from the bidirectional lead screw, and the other end extends toward the clamping plate side of another clamping arm.
[0008] Preferably, an anti-slip pad is provided at the end of the clamping plate away from the electric telescopic rod.
[0009] Preferably, the base has multiple grooves at its bottom, which surround the periphery of the laser rangefinder; the lifting assembly includes a hook, a winding shaft, and a second drive motor for driving the winding shaft to rotate; one end of the hook is connected to the winding shaft, and the other end extends downward to the base; the winding shaft is rotatably connected in the groove; the second drive motor is mounted in the base, and the output end of the second drive motor is connected to the winding shaft.
[0010] Preferably, the horizontal adjustment mechanism includes a crossbeam, a threaded rod, a guide rod, a slider, and a third drive motor; the two ends of the crossbeam are respectively disposed at the upper ends of two movable support mechanisms; the threaded rod is rotatably connected to the lower end of the crossbeam; the guide rod is fixed to the lower end of the crossbeam and located on one side of the threaded rod; the slider is provided with a threaded hole and a guide hole, the threaded rod is threadedly connected to the threaded hole, and the guide rod passes through the guide hole; the third drive motor is disposed on the side wall of the crossbeam, and the output end of the third drive motor is connected to the threaded rod.
[0011] Preferably, the movable support mechanism includes a support rod, a support base, and multiple sets of pulleys; the support rod is fixed to the upper end of the support base; and the multiple sets of pulleys are assembled at the bottom of the support base.
[0012] Compared with the prior art, the technical solution provided by this utility model has the following advantages:
[0013] (1) The present invention provides a prefabricated component hoisting and installation precision positioning device. Because it is equipped with a movable support mechanism, a horizontal adjustment mechanism and a hoisting mechanism, and the hoisting mechanism is equipped with a base, two clamping arms, a lifting component and a laser rangefinder, through the cooperation of the above components, it can not only facilitate the movement of the prefabricated component to the designated position, but also ensure the stability of the prefabricated component during the hoisting process, improve the installation positioning accuracy of the prefabricated component, effectively avoid the influence of tide level and wind waves, and improve the safety of prefabricated component hoisting operation.
[0014] (2) The present invention provides a prefabricated component hoisting and installation precision positioning device. Because it is equipped with a sliding groove, a bidirectional screw and a first drive motor, the bidirectional screw is driven to rotate by the first drive motor. The thread transmission characteristics of the bidirectional screw are used to make the two clamping arms move synchronously towards or away from each other along the sliding groove. This not only facilitates the clamping of the foundation pile by the two clamping arms and improves the stability of the foundation, but also allows the spacing between the two clamping arms to be adjusted according to the size of the foundation pile, thereby improving the adaptability range of the prefabricated component hoisting and installation precision positioning device.
[0015] (3) The present invention provides a precast component hoisting and installation precision positioning device. Since the clamping arm is equipped with an electric telescopic rod and a clamping plate, the clamping plate moves up and down relative to the foundation pile through the electric telescopic rod. When it is necessary to lower the precast component onto the foundation pile, the clamping plate can be moved down to one side of the foundation pile, so that the two clamping plates can clamp the foundation pile, ensure the stability of the base, prevent the lifting assembly from swinging when lowering the precast component, so that the precast component can be accurately lowered to the designated position on the foundation pile, improve the installation accuracy of the precast component, and after the precast component is accurately installed, the length of the electric telescopic rod can be shortened so that the clamping plate moves closer to the bottom of the base, so as to hoist the next precast component.
[0016] (4) The present invention provides a prefabricated component hoisting and installation precision positioning device, which can effectively improve the connection stability between the clamping plate and the foundation pile by setting anti-slip pads, further improve the stability of the base, and improve the installation accuracy of the prefabricated components.
[0017] (5) The present invention provides a prefabricated component hoisting and installation precision positioning device, which hangs multiple hooks on the prefabricated component and drives the winding shaft to rotate by the second drive motor to adjust the extension length of the hooks, thereby realizing the lifting or lowering of the prefabricated component. This can effectively improve the stability of the prefabricated component during the lifting or lowering process, prevent the prefabricated component from swinging or rotating, and further improve the installation accuracy of the prefabricated component.
[0018] (6) The present invention provides a precise positioning device for hoisting and installing precast components. The horizontal adjustment mechanism includes a crossbeam, a threaded rod, a guide rod, a slider, and a third drive motor. The slider has a threaded hole and a guide hole. The third drive motor drives the threaded rod to rotate, causing the slider to move left and right relative to the crossbeam, thereby moving the base left and right relative to the crossbeam. This allows the precast component to be moved to a designated position in the width direction of the proposed wharf area. The guide rod is used to move the slider along a predetermined direction, preventing deviation or swaying during movement and improving the stability of the precast component during hoisting. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the prior art and the embodiments of this application, the drawings used in the description of the prior art and the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a partial structural schematic diagram of a precise positioning device for hoisting and installing prefabricated components according to the present invention.
[0021] Figure 2 This is a schematic diagram of the internal structure of the hoisting mechanism.
[0022] Figure 3 This is a bottom view of the hoisting mechanism.
[0023] Figure 4 This is a schematic diagram showing the usage status of a precise positioning device for hoisting and installing prefabricated components according to this utility model.
[0024] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.
[0025] Explanation of reference numerals in the attached drawings: movable support mechanism 100, support rod 110, support base 120, pulley 130, horizontal adjustment mechanism 200, crossbeam 210, threaded rod 220, guide rod 230, slider 240, third drive motor 250, hoisting mechanism 300, base 310, slide groove 311, double-acting lead screw 312, first drive motor 313, groove 314, clamping arm 320, electric telescopic rod 321, clamping plate 322, anti-slip pad 323, hook 330, winding shaft 340, second drive motor 350, laser rangefinder 360, temporary mounting frame 400, slide rail 410, prefabricated component 500, foundation pile 600. Detailed Implementation
[0026] To better understand the purpose, structure, and function of this utility model, the following detailed description, in conjunction with the accompanying drawings, provides a precise positioning device for hoisting and installing prefabricated components, so that those skilled in the art can better understand and implement this utility model. However, the embodiments described are not intended to limit this utility model.
[0027] Please see Figures 1 to 5As shown in the embodiment of this application, a precise positioning device for hoisting and installing prefabricated components is provided, including two movable support mechanisms 100, a horizontal adjustment mechanism 200, and a hoisting mechanism 300. The two ends of the horizontal adjustment mechanism 200 are respectively disposed at the upper ends of the two movable support mechanisms 100. The hoisting mechanism 300 is disposed at the bottom of the horizontal adjustment mechanism 200. The hoisting mechanism 300 includes a base 310, two clamping arms 320, a lifting assembly, and a laser rangefinder 360. The base 310 is connected to the bottom of the horizontal adjustment mechanism 200. The two clamping arms 320 are slidably connected to the bottom of the base 310, and the two clamping arms 320 can move relative to the base 310 in a direction that approaches or moves away from each other. The lifting assembly is assembled at the bottom of the base 310 and located between the two clamping arms 320. The laser rangefinder 360 is disposed at the center of the bottom of the base 310. The precast component hoisting and installation precision positioning device also includes two temporary mounting frames 400, which are set on both sides of the width of the proposed wharf area; the upper end of one temporary mounting frame 400 is provided with a slide rail 410, and the pulley 130 of the movable support mechanism 100 is slidably connected to the slide rail 410. One temporary mounting frame 400 is set along the length of the proposed wharf area.
[0028] Because it is equipped with a movable support mechanism 100, a horizontal adjustment mechanism 200, and a hoisting mechanism 300, and the hoisting mechanism 300 is equipped with a base 310, two clamping arms 320, a lifting assembly, and a laser rangefinder 360, the coordinated use of these components not only facilitates the movement of precast components 500 (such as precast hollow pile caps) to designated positions, but also ensures the stability of precast components 500 during hoisting, improves the installation and positioning accuracy of precast components 500, effectively avoids the influence of tides and waves, and improves the safety of hoisting operations of precast components 500. Specifically, the movable support mechanism 100 includes a support rod 110, a support base 120, and multiple sets of pulleys 130; the support rod 110 is fixed to the upper end of the support base 120; and the multiple sets of pulleys 130 are assembled at the bottom of the support base 120. The pulleys 130 of the two movable support mechanisms 100 are mounted on the slide rails 410 of the temporary mounting frame 400, allowing the movable support mechanisms 100 to move along the length of the proposed wharf area. A horizontal adjustment mechanism 200 is used to adjust the position of the hoisting mechanism 300 in the width direction of the proposed wharf area. Through the coordinated use of the movable support mechanisms 100 and the horizontal adjustment mechanism 200, the precast component 500 is moved to the designated position. The hoisting mechanism 300 is used to hoist the precast component 500 above the designated foundation pile 600, ensuring the stability of the precast component 500 during installation and lowering, and improving the installation positioning accuracy of the precast component 500. This allows the precast component 500 to be smoothly assembled onto the foundation pile 600, effectively preventing the precast component 500 from swaying and failing to install properly due to tidal levels and waves. This significantly improves the safety of the hoisting operation of the precast component 500 while increasing construction efficiency.
[0029] Furthermore, by connecting the base 310 to the horizontal adjustment mechanism 200, the base 310 can move along the width direction of the proposed wharf area with the slider 240 of the horizontal adjustment mechanism 200, thereby driving the precast component 500 suspended below the lifting assembly to move along the width direction of the proposed wharf area, so as to move the precast component 500 above the designated foundation pile 600. By setting two clamping arms 320 and enabling the two clamping arms 320 to move relative to the base 310 in a direction that approaches or moves away from each other, the precast component 500 is clamped onto the foundation pile 600 after it is moved to the designated position, thereby improving the stability of the base 310 and preventing the lifting assembly from swinging when lowering the precast component 500, so that the precast component 500 can be accurately lowered to the designated position on the foundation pile 600, thus improving the installation accuracy of the precast component 500. By setting up a laser rangefinder 360, construction personnel can not only conveniently monitor and adjust the lifting height of the precast component 500, but also understand the lowering height of the precast component 500 in a timely manner during the lowering process, so as to accurately lower the precast component 500 to the designated position on the foundation pile 600, improve the lowering accuracy of the precast component 500, and ensure construction safety.
[0030] Preferably, the base 310 has two symmetrical sliding grooves 311 at its bottom; a bidirectional lead screw 312 is rotatably connected inside the base 310; a first drive motor 313 for driving the bidirectional lead screw 312 to rotate is provided on the outer side wall of the base 310; one end of a clamping arm 320 is located inside the base 310 and is threadedly connected to the bidirectional lead screw 312, and the other end passes through the sliding groove 311 and extends downward to the bottom of the base 310.
[0031] Because it is equipped with a sliding groove 311, a bidirectional lead screw 312 and a first drive motor 313, the first drive motor 313 drives the bidirectional lead screw 312 to rotate. The thread transmission characteristics of the bidirectional lead screw 312 make the two clamping arms 320 move synchronously towards or away from each other along the sliding groove 311. This not only facilitates the clamping of the foundation pile 600 by the two clamping arms 320 and improves the stability of the base 310, but also allows the spacing between the two clamping arms 320 to be adjusted according to the size of the foundation pile 600, thereby increasing the adaptability of the precise positioning device for hoisting and installing the precast component.
[0032] Preferably, one clamping arm 320 includes an electric telescopic rod 321 and a clamping plate 322; one end of the electric telescopic rod 321 is threadedly connected to a bidirectional lead screw 312, and the other end passes through a slide groove 311 and extends downward to below the base 310; one end of the clamping plate 322 is connected to the end of the electric telescopic rod 321 away from the bidirectional lead screw 312, and the other end extends toward the clamping plate 322 side of the other clamping arm 320.
[0033] Because the clamping arm 320 is equipped with an electric telescopic rod 321 and a clamping plate 322, the electric telescopic rod 321 drives the clamping plate 322 to move up and down relative to the foundation pile 600. When it is necessary to lower the precast component 500 onto the foundation pile 600, the clamping plate 322 can be moved down to one side of the foundation pile 600, so that the two clamping plates 322 can clamp the foundation pile 600, ensuring the stability of the base 310 and preventing the lifting assembly from swinging when lowering the precast component 500. This allows the precast component 500 to be accurately lowered to the designated position on the foundation pile 600, improving the installation accuracy of the precast component 500. After the precast component 500 is accurately installed, the length of the electric telescopic rod 321 can be shortened so that the clamping plate 322 moves closer to the bottom of the base 310, so as to lift the next precast component 500.
[0034] Preferably, an anti-slip pad 323 is provided at the end of the clamping plate 322 away from the electric telescopic rod 321. By providing the anti-slip pad 323, the connection stability between the clamping plate 322 and the foundation pile 600 can be effectively improved, the stability of the base 310 can be further improved, and the installation accuracy of the precast component 500 can be improved.
[0035] Preferably, the base 310 has a plurality of grooves 314 at its bottom, which surround the periphery of the laser rangefinder 360; the lifting assembly includes a hook 330, a winding shaft 340, and a second drive motor 350 for driving the winding shaft 340 to rotate; one end of the hook 330 is connected to the winding shaft 340, and the other end extends downward to the bottom of the base 310; the winding shaft 340 is rotatably connected in the grooves 314; the second drive motor 350 is mounted in the base 310, and the output end of the second drive motor 350 is connected to the winding shaft 340.
[0036] In this embodiment, the lifting assembly is provided in four sets. The bottom of the base 310 has four grooves 314. By hanging multiple hooks 330 on the prefabricated component 500, the second drive motor 350 drives the winding shaft 340 to rotate, thereby adjusting the extension and retraction length of the hooks 330, so as to realize the lifting or lowering of the prefabricated component 500. This can effectively improve the stability of the prefabricated component 500 during the lifting or lowering process, prevent the prefabricated component 500 from swinging or rotating, and further improve the installation accuracy of the prefabricated component 500.
[0037] Preferably, the horizontal adjustment mechanism 200 includes a crossbeam 210, a threaded rod 220, a guide rod 230, a slider 240, and a third drive motor 250; the two ends of the crossbeam 210 are respectively disposed on the upper ends of the two movable support mechanisms 100; the threaded rod 220 is rotatably connected to the lower end of the crossbeam 210; the guide rod 230 is fixed to the lower end of the crossbeam 210 and located on one side of the threaded rod 220; the slider 240 is provided with a threaded hole and a guide hole, the threaded rod 220 is threadedly connected to the threaded hole, and the guide rod 230 passes through the guide hole; the third drive motor 250 is disposed on the side wall of the crossbeam 210, and the output end of the third drive motor 250 is connected to the threaded rod 220.
[0038] The horizontal adjustment mechanism 200 includes a crossbeam 210, a threaded rod 220, a guide rod 230, a slider 240, and a third drive motor 250. The slider 240 has threaded holes and guide holes. The third drive motor 250 drives the threaded rod 220 to rotate, causing the slider 240 to move left and right relative to the crossbeam 210. This, in turn, moves the base 310 left and right relative to the crossbeam 210, thereby moving the precast component 500 to a designated position in the width direction of the proposed wharf area. The guide rod 230 is used to guide the slider 240 along a predetermined direction, preventing deviation or swaying during movement and improving the stability of the precast component 500 during hoisting.
[0039] The working principle of the precast component hoisting and installation precision positioning device provided in this embodiment is as follows: In use, a temporary mounting frame 400 is first set up on both sides of the width direction of the proposed wharf area. The precast component hoisting and installation precision positioning device is then installed on the two temporary mounting frames 400. Specifically, the pulleys 130 of the two movable support mechanisms 100 are respectively mounted on the slide rails 410 of the two temporary mounting frames 400. The device can then be moved along the length direction of the proposed wharf area. The threaded rod 220 is driven to rotate by the third drive motor 250 to adjust the position of the slider 240 relative to the crossbeam 210, thereby causing the base 310 to move left and right relative to the crossbeam 210. This adjusts the position of the precast component 500, which is hung on the hook 330, in the width direction of the proposed wharf area until the precast component 500 is positioned above the designated foundation pile 600. By extending the length of the electric telescopic rod 321, the clamping plate 322 moves downward to one side of the foundation pile 600. The first drive motor 313 drives the bidirectional lead screw 312 to rotate. Utilizing the threaded transmission characteristics of the bidirectional lead screw 312, the two electric telescopic rods 321 move synchronously towards each other along the slide groove 311, so that the two clamping plates 322 move towards one side of the foundation pile 600 until the anti-slip plate on the clamping plate 322 abuts against the foundation pile 600. The second drive motor 350 drives the winding shaft 340 to rotate, so as to slowly lower the prefabricated component 500 hanging on the hook 330 until the prefabricated component 500 is accurately lowered onto the designated foundation pile 600, thus completing the precise installation of the prefabricated component 500.
[0040] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A precise positioning device for hoisting and installing prefabricated components, characterized in that, It includes two movable support mechanisms (100), a horizontal adjustment mechanism (200), and a hoisting mechanism (300); the two ends of the horizontal adjustment mechanism (200) are respectively disposed at the upper ends of the two movable support mechanisms (100); the hoisting mechanism (300) is disposed at the bottom of the horizontal adjustment mechanism (200); the hoisting mechanism (300) includes a base (310), two clamping arms (320), a lifting assembly, and a laser rangefinder (360); the base (310) 10) Connected to the bottom of the horizontal adjustment mechanism (200); the two clamping arms (320) are slidably connected to the bottom of the base (310), and the two clamping arms (320) can move relative to the base (310) in a direction that is closer to or further away from each other; the lifting assembly is assembled at the bottom of the base (310) and located between the two clamping arms (320); the laser rangefinder (360) is located at the center of the bottom of the base (310).
2. The precise positioning device for hoisting and installing precast components according to claim 1, characterized in that, It also includes two temporary mounting frames (400), which are located on both sides of the width of the proposed dock area; a slide rail (410) is provided at the upper end of one of the temporary mounting frames (400), and the pulley (130) of the movable support mechanism (100) is slidably connected to the slide rail (410).
3. The precise positioning device for hoisting and installing precast components according to claim 1, characterized in that, The base (310) has two symmetrical sliding grooves (311) at its bottom; a bidirectional lead screw (312) is rotatably connected inside the base (310); a first drive motor (313) for driving the bidirectional lead screw (312) to rotate is provided on the outer side wall of the base (310); one end of a clamping arm (320) is located inside the base (310) and threadedly connected to the bidirectional lead screw (312), and the other end passes through the sliding groove (311) and extends downward to below the base (310).
4. The precise positioning device for hoisting and installing precast components according to claim 3, characterized in that, One of the clamping arms (320) includes an electric telescopic rod (321) and a clamping plate (322); one end of the electric telescopic rod (321) is threaded to the bidirectional lead screw (312), and the other end passes through the slide groove (311) and extends downward to below the base (310); one end of the clamping plate (322) is connected to the end of the electric telescopic rod (321) away from the bidirectional lead screw (312), and the other end extends toward the clamping plate (322) side of the other clamping arm (320).
5. The precise positioning device for hoisting and installing precast components according to claim 4, characterized in that, An anti-slip pad (323) is provided at the end of the clamping plate (322) away from the electric telescopic rod (321).
6. The precise positioning device for hoisting and installing precast components according to any one of claims 1 to 5, characterized in that, The base (310) has a plurality of grooves (314) at its bottom, and the plurality of grooves (314) are arranged around the periphery of the laser rangefinder (360); the lifting assembly includes a hook (330), a winding shaft (340) and a second drive motor (350) for driving the winding shaft (340) to rotate; one end of the hook (330) is connected to the winding shaft (340), and the other end extends downward to below the base (310); the winding shaft (340) is rotatably connected in the grooves (314); the second drive motor (350) is assembled in the base (310), and the output end of the second drive motor (350) is connected to the winding shaft (340).
7. The precise positioning device for hoisting and installing precast components according to claim 6, characterized in that, The horizontal adjustment mechanism (200) includes a crossbeam (210), a threaded rod (220), a guide rod (230), a slider (240), and a third drive motor (250). The two ends of the crossbeam (210) are respectively disposed on the upper ends of the two movable support mechanisms (100). The threaded rod (220) is rotatably connected to the lower end of the crossbeam (210). The guide rod (230) is fixed to the lower end of the crossbeam (210) and located on one side of the threaded rod (220). The slider (240) is provided with a threaded hole and a guide hole. The threaded rod (220) is threadedly connected to the threaded hole, and the guide rod (230) passes through the guide hole. The third drive motor (250) is disposed on the side wall of the crossbeam (210), and the output end of the third drive motor (250) is connected to the threaded rod (220).
8. The precise positioning device for hoisting and installing precast components according to claim 6, characterized in that, The movable support mechanism (100) includes a support rod (110), a support base (120), and multiple sets of pulleys (130); the support rod (110) is fixed to the upper end of the support base (120); the multiple sets of pulleys (130) are assembled at the bottom of the support base (120).