A precast concrete slab hoisting device and a method of using the same

The adjustment mechanism of the precast concrete slab hoisting device solves the problems of direction adjustment and environmental impact during hoisting, achieving efficient and safe suspension and installation of precast concrete slabs.

CN118270633BActive Publication Date: 2026-06-23CCCC SECOND HIGHWAY ENG BUREAU RAILWAY CONSTR CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CCCC SECOND HIGHWAY ENG BUREAU RAILWAY CONSTR CO LTD
Filing Date
2024-04-07
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

The existing precast concrete slabs are difficult to oriented during hoisting, are easily affected by environmental factors and sway, and the suspension cables are subjected to uneven stress, which affects construction safety and makes relocation inconvenient.

Method used

A precast concrete slab hoisting device is adopted, which includes a connecting plate, adjusting components, a pusher, a pusher ring, and an adjusting motor. The position and angle of the precast concrete slab are adjusted by driving the adjusting threaded rod and the worm gear mechanism through the adjusting motor, and it is used in conjunction with existing steel cable equipment for suspension.

Benefits of technology

It enables convenient adjustment of the suspension position of precast concrete slabs, reduces the impact of environmental factors on hoisting, and improves construction safety and operational efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a precast concrete slab hoisting device and a use method thereof, and comprises a first function mechanism, the first function mechanism comprises a connecting plate and an adjusting component, a mounting seat is fixedly connected to the bottom of the connecting plate through bolts, two moving openings are formed in the top of the mounting seat, a push frame is slidingly inserted into each moving opening, a push ring is rotatably connected between the opposite inner walls on the two sides of each push frame, and two groups of mounting blocks are fixedly connected to the top of the mounting seat. In the application, when in use, the device can be stably connected with an existing hoisting device through the connecting plate, and then the use position of the moving block can be conveniently adjusted by increasing or decreasing the moving pins according to the actual precast concrete slab specifications, and then the precast concrete slab can be conveniently fixed and connected in position by cooperating with the existing steel cable equipment, and then the device can be conveniently pulled and suspended by the existing hoisting device, so that the device can effectively suspend and handle the precast concrete slab by cooperating with the existing steel cable.
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Description

Technical Field

[0001] This invention belongs to the field of hoisting equipment technology, specifically a precast concrete slab hoisting device and its usage method. Background Technology

[0002] Precast concrete refers to concrete products made in a factory or on-site. Precast concrete is poured elsewhere rather than at the final construction site. Fiber reinforced concrete of different sizes and shapes can enhance its reliability and toughness after cracking.

[0003] However, in existing technologies, precast concrete slabs require four lifting points to maintain balance during hoisting. If four steel cables are directly used to hang the slabs from the hooks, it becomes difficult to adjust the orientation of the precast concrete slabs in the air, making it difficult to install them in the intended position. Furthermore, when the precast concrete slabs are hoisted to a high position, they are easily affected by environmental factors and sway, which can lead to uneven stress on the suspension cables, affecting the safety of actual construction. In addition, it is not convenient to move or transfer the precast concrete slabs, resulting in poor actual performance of existing precast concrete slab hoisting equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a precast concrete slab hoisting device and its usage method that can conveniently adjust the suspension position of precast concrete slabs according to actual installation requirements, thereby facilitating the installation of precast concrete slabs, and effectively reducing the impact of environmental factors on the suspension of precast concrete slabs.

[0005] The technical solution adopted in this invention is as follows: A precast concrete slab hoisting device includes: a first functional mechanism, the first functional mechanism including a connecting plate and an adjusting component, the bottom of the connecting plate is fixedly connected to a mounting base by bolts, the top of the mounting base has two movable openings, each movable opening is slidably inserted with a pusher, each pusher is rotatably connected to the inner surface wall on both sides of the pusher, the top of the mounting base is fixedly connected with two sets of mounting blocks, each set of mounting blocks has two blocks, each set of two mounting blocks is rotatably connected to the outer surface of the two mounting blocks, each movable threaded rod is threadedly connected to the corresponding pusher, each movable threaded rod is fitted with a movable worm gear on its outer surface, and the adjusting component is disposed on the mounting base;

[0006] The second functional mechanism comprises two sets, each set including a first adapter ring rotatably connected to the bottom of the mounting base. The first adapter ring is rotatably connected to one end of a corresponding push ring. A connecting steel rope is slidably fitted onto one end of the first adapter ring, and a second adapter ring is rotatably connected to one end of the connecting steel rope. Connecting strips are rotatably connected to both outer surfaces of the second adapter ring, and a connecting bolt slidably passes between the two connecting strips on their respective outer surfaces.

[0007] The third functional mechanism includes a thick plate. Multiple first mounting holes are equidistantly provided on the outer surfaces of both sides of the thick plate. The thick plate is slidably fitted onto the outer surface of the connecting bolt through the first mounting holes. Steel beams are fixedly connected to both outer surfaces of the thick plate. Channel steel is fixedly connected to the inner wall of one side of each steel beam. Side plates are fixedly connected to both ends of the thick plate.

[0008] The mounting base has two sets of fixing bars fixedly connected to its top. Each set of fixing bars has two bars. A movable worm gear is rotatably connected between the outer surfaces of the two fixing bars in each set. Each movable worm gear is engaged with a corresponding movable worm wheel.

[0009] The mounting base has two sliding frames fixedly connected to its top, and each sliding frame has a connecting toothed plate slidably inserted inside.

[0010] Each of the moving worm gears has a connecting gear fitted on its outer surface near one end edge, and each connecting gear meshes with a corresponding connecting tooth plate.

[0011] The adjustment components are provided in two sets, and each set of adjustment components includes a limiting piece. There are two limiting pieces, and both limiting pieces are fixedly connected to the mounting base. An adjusting threaded rod is rotatably connected between the outer surfaces of the two limiting pieces. An adjusting piece is threadedly connected to the outer surface of the adjusting threaded rod. One outer surface of the adjusting piece is fixedly connected to the outer surface of the corresponding connecting toothed plate.

[0012] The mounting base has two adjustable motors fixedly connected to its top, and the output end of each adjustable motor is fixedly connected to one end of the corresponding adjustable threaded rod.

[0013] In each group of two connecting strips, a positioning block is slidably inserted between the inner surfaces of the two connecting strips, and each positioning block is slidably fitted onto the top of the thick plate.

[0014] Each of the steel beams has multiple second mounting holes equidistantly spaced on one side of its outer surface, and each of the channel steels has multiple third mounting holes equidistantly spaced on one side of its outer surface. Each of the third mounting holes and the corresponding first and second mounting holes are connected.

[0015] In this configuration, a movable bolt is slidably inserted between the interiors of the two sets of second mounting holes, and two movable blocks are slidably fitted on the outer surface of each movable bolt. A lifting block is rotatably connected to the bottom of each movable block.

[0016] A method for using a precast concrete slab hoisting device includes the following steps:

[0017] S1. Installation and Lifting: The connecting plate can securely connect the equipment to the existing lifting device. Then, according to the actual specifications of the precast concrete slab, the position of the moving block can be easily adjusted by adding or removing moving bolts. In conjunction with the existing steel cable equipment, the position of the precast concrete slab can be easily fixed and connected. Then, the equipment can be easily pulled and suspended by the existing lifting device, so that the equipment can be used with the existing steel cable to suspend the precast concrete slab.

[0018] S2. Lifting and Adjustment: During the suspension process using the existing lifting device, based on the environmental factors affecting the precast concrete slab, the adjustment motor is activated to drive the corresponding adjustment threaded rod to rotate. This rotating threaded rod moves the adjustment plate to adjust its position, which in turn moves the connecting gear plate to adjust its position. During the movement of the connecting gear plate, the connecting gear drives the moving worm gear to rotate, which in turn drives the corresponding moving threaded rod to rotate. This allows the rotating threaded rod to easily adjust the position of the push frame. Under the positional constraints of the moving port, the push frame can adjust the position of the push ring. Under the positional constraints of the mounting base, the push ring can adjust the angle of the first transition ring. The first transition ring, in conjunction with the connecting steel rope, the second transition ring, and the connecting strip, can adjust the overall angle of the third functional mechanism. This allows the third functional mechanism to adjust the suspension angle of the precast concrete slab using the existing steel cable equipment.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] In this invention, during use, the connecting plate securely connects the equipment to the existing lifting device. Based on the actual specifications of the precast concrete slab, the position of the adjusting block can be easily moved and adjusted by adding or removing moving bolts. Combined with existing steel cable equipment, the position of the precast concrete slab can be easily fixed. The existing lifting device can then easily pull and suspend the equipment, enabling the equipment to effectively suspend the precast concrete slab with the existing steel cable, allowing the equipment to efficiently perform its intended functions. Furthermore, during the suspension process using the existing lifting device, considering the environmental factors affecting the precast concrete slab, the adjusting motor is activated, causing the corresponding adjusting threaded rod to rotate. This rotating threaded rod effectively moves the position of the adjusting plate, which in turn effectively moves the position of the adjusting linkage toothed plate. During the positional movement, the linkage gear effectively drives the moving worm gear to rotate, which in turn, in conjunction with the linkage worm wheel, effectively drives the corresponding moving threaded rod to rotate. This allows the rotating moving threaded rod to easily move and adjust the corresponding push frame's position. Under the positional constraints of the moving port, the push frame can effectively move and adjust the push ring's position. Under the positional constraints of the mounting base, the push ring can move and adjust the corresponding first adapter ring's angle. This allows the first adapter ring, in conjunction with the connecting steel rope, the second adapter ring, and the connecting strip, to effectively adjust the overall angle of the third functional mechanism. Consequently, the third functional mechanism can adjust the suspension angle of the precast concrete slab using existing steel cable equipment, ensuring that the adjusted precast concrete slab is less affected by external environmental factors. Furthermore, the installation angle of the precast concrete slab can be easily adjusted during installation, enabling the equipment to efficiently perform its intended functions. Attached Figure Description

[0021] Figure 1 This is a frontal perspective view of the present invention;

[0022] Figure 2 This is a bottom-view perspective view of the present invention;

[0023] Figure 3 This is a frontal sectional perspective view of the present invention;

[0024] Figure 4 This is a frontal sectional perspective view of the first functional mechanism of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged view of section A in the middle;

[0026] Figure 6 This is a frontal sectional view of the second functional mechanism of the present invention.

[0027] Figure 7This is a frontal sectional view of the third functional mechanism of the present invention.

[0028] The diagram shows the following markings: 1. First functional mechanism; 101. Connecting plate; 102. Mounting base; 103. Adjusting motor; 104. Moving threaded rod; 105. Push frame; 106. Push ring; 107. Moving worm gear; 108. Moving worm; 109. Connecting gear; 110. Slide frame; 111. Connecting gear plate; 112. Adjusting threaded rod; 113. Adjusting plate; 2. Second functional mechanism; 201. First transition ring; 202. Connecting steel rope; 203. Second transition ring; 204. Connecting strip; 205. Connecting bolt; 206. Positioning block; 3. Third functional mechanism; 301. Thick plate; 302. Steel beam; 303. Side plate; 304. Channel steel; 305. Moving bolt; 306. Moving block; 307. Lifting block. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] Example 1

[0031] Reference Figures 1-7A precast concrete slab hoisting device includes: a first functional mechanism 1, a second functional mechanism 2, and a third functional mechanism 3. The first functional mechanism 1 includes a connecting plate 101 and adjusting components. The connecting plate 101 provides an installation base for other functional components of the device. A mounting seat 102 is bolted to the bottom of the connecting plate 101, facilitating the installation of other functional components. Two movable openings are provided on the top of the mounting seat 102, facilitating the installation of pushers 105. A pusher 105 is slidably inserted into each movable opening, effectively adjusting the position of a pusher ring 106. Each pusher 105 has a pusher ring rotatably connected between its two sides and their inner surfaces. 106. The push ring 106 allows for convenient adjustment of the operating angle of the first adapter ring 201. Two sets of mounting blocks are fixedly connected to the top of the mounting base 102, with two blocks in each set. A movable threaded rod 104 is rotatably connected between the outer surfaces of the two mounting blocks in each set. The movable threaded rod 104 facilitates the adjustment of the operating position of the push frame 105. Each movable threaded rod 104 is threadedly connected to the corresponding push frame 105. A movable worm gear 107 is fitted onto the outer surface of each movable threaded rod 104. The movable worm gear 107, in conjunction with the movable worm 108 and the connecting gear 109, enables the connecting gear plate 111 to effectively rotate and adjust the corresponding adjusting threaded rod 112. The adjusting component is mounted on the mounting base 102. The second functional mechanism 2 is provided with... There are two sets, each of which includes a first adapter ring 201. The first adapter ring 201, in conjunction with the connecting steel rope 202 and the second adapter ring 203, facilitates the installation of other functional components of the equipment. The first adapter ring 201 is rotatably connected to the bottom of the mounting base 102. The first adapter ring 201 is rotatably connected to one end of the corresponding push ring 106. The connecting steel rope 202 is slidably sleeved on one end of the first adapter ring 201. The second adapter ring 203 is rotatably connected to one end of the connecting steel rope 202. Connecting strips 204 are rotatably connected to both outer surfaces of the second adapter ring 203. A connecting bolt 205 slides through the two connecting strips 204 relative to each other. When the connecting bolt 205 is in place, the second functional mechanism 2 and the third functional mechanism 3 can be securely connected. The third functional mechanism 3 includes a thick plate 301. Multiple first mounting holes are equidistantly provided on the outer surfaces of both sides of the thick plate 301. The establishment of the first mounting holes, together with the second and third mounting holes, facilitates the installation of other functional components of the equipment. The thick plate 301 is slidably sleeved on the outer surface of the connecting bolt 205 through the first mounting holes. Steel beams 302 are fixedly connected to both outer surfaces of the thick plate 301. The establishment of steel beams 302 facilitates the installation of other functional components of the equipment. A channel steel 304 is fixedly connected to the inner wall of one side of each steel beam 302. The establishment of channel steel 304, together with the thick plate 301 and the side plate 303, facilitates the installation of other functional components of the equipment and provides overall stability of the equipment. Side plates 303 are fixedly connected to both ends of the thick plate 301.

[0032] Reference Figures 3-7 The top of the mounting base 102 is fixedly connected to two sets of fixing bars, with two fixing bars in each set. A movable worm gear 108 is rotatably connected between the outer surfaces of the two fixing bars in each set. Each movable worm gear 108 meshes with a corresponding movable worm wheel 107. The top of the mounting base 102 is fixedly connected to two sliding frames 110. A connecting gear plate 111 is slidably inserted inside each sliding frame 110. A connecting gear 109 is fitted onto the outer surface of each movable worm gear 108 near one edge. Each connecting gear 109 meshes with a corresponding connecting gear... All gear plates 111 are engaged. Two sets of adjusting components are provided, each set including two limiting plates. Both limiting plates are fixedly connected to the mounting base 102. An adjusting threaded rod 112 is rotatably connected between the outer surfaces of the two limiting plates. The adjusting threaded rod 112 allows for convenient adjustment of the position of the adjusting plate 113. The adjusting plate 113 is threaded onto the outer surface of the adjusting threaded rod 112. When the adjusting plate 113 is in place, the adjusting threaded rod 112 can effectively move and adjust the gear plate 111. The outer surface of one side of the adjusting plate 113 is fixedly connected to the outer surface of the corresponding connecting toothed plate 111. Two adjusting motors 103 are fixedly connected to the top of the mounting base 102. The adjusting motors 103 provide rotational power for the adjusting threaded rod 112. The output end of each adjusting motor 103 is fixedly connected to one end of the corresponding adjusting threaded rod 112. A positioning block 206 is slidably inserted between the inner walls of each pair of connecting bars 204. The positioning block 206 can effectively limit the operating angle of the connecting bar 204. Each positioning block 206 is slidably sleeved on the top of the thick plate 301. Each steel beam 302 has multiple second mounting holes equidistantly opened on one side of its outer surface. Each channel steel 304 has multiple third mounting holes equidistantly opened on one side of its outer surface. Each third mounting hole and its corresponding first mounting hole and second mounting hole are connected. A movable bolt 305 slidably passes through the interior of each of the two sets of second mounting holes. Two movable blocks 306 are slidably sleeved on the outer surface of each movable bolt 305. A lifting block 307 is rotatably connected to the bottom of each movable block 306.

[0033] The following provides a detailed description of the method of using a precast concrete slab hoisting device provided in an embodiment of the present invention. The method of use includes the following steps:

[0034] Step 1, Installation and Lifting: The connecting plate 101 can securely connect the equipment to the existing lifting device. Then, according to the actual specifications of the precast concrete slab, the position of the moving block 306 can be easily adjusted by adding or removing the moving bolts 305. In conjunction with the existing steel cable equipment, the position of the precast concrete slab can be easily fixed and connected. Then, the equipment can be easily pulled and suspended by the existing lifting device. Thus, the equipment can effectively suspend the precast concrete slab with the existing steel cable, enabling the equipment to efficiently perform its intended functions.

[0035] Step Two, Lifting and Adjustment: During the suspension process using the existing lifting equipment, based on the environmental factors affecting the precast concrete slab, the adjustment motor 103 is activated. This motor drives the corresponding adjustment threaded rod 112 to rotate, effectively moving the adjustment plate 113 to its position. The adjustment plate 113 then moves the connecting gear plate 111 to its position. During this movement, the connecting gear plate 111, in conjunction with the connecting gear 109, effectively drives the moving worm gear 108 to rotate. This rotating worm gear, in conjunction with the connecting worm wheel, effectively drives the corresponding moving threaded rod 104 to rotate, allowing the rotating threaded rod 104 to be easily moved and adjusted. The section corresponds to the position of the push frame 105, which allows the push frame 105 to effectively move and adjust the position of the push ring 106 under the position restriction of the moving port. Then, under the position restriction of the mounting base 102, the push ring 106 can move and adjust the angle of the corresponding first adapter ring 201. In turn, the first adapter ring 201, together with the connecting steel rope 202, the second adapter ring 203 and the connecting strip 204, can effectively adjust the overall angle of the third functional mechanism 3. This allows the third functional mechanism 3 to adjust the suspension angle of the precast concrete slab using existing steel cable equipment, thereby ensuring that the adjusted precast concrete slab is not easily affected by external environmental factors. At the same time, the installation angle of the precast concrete slab can be easily adjusted during installation, thus enabling the equipment to efficiently perform its intended functions.

[0036] The above description is only a preferred embodiment of the present invention and is 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 precast concrete slab hoisting device, characterized in that, include: The first functional mechanism (1) includes a connecting plate (101) and an adjusting component. The bottom of the connecting plate (101) is fixedly connected to a mounting base (102) by bolts. The top of the mounting base (102) has two movable openings. A pusher (105) is slidably inserted into each movable opening. A push ring (106) is rotatably connected between the two sides of each pusher (105) relative to the inner surface wall. The top of the mounting base (102) is fixedly connected to two sets of mounting blocks. Each set of mounting blocks has two blocks. The two mounting blocks in each set are opposite to the outer surface. A movable threaded rod (104) is rotatably connected between them. Each movable threaded rod (104) and the corresponding pusher (105) are threadedly connected. A movable worm gear (107) is sleeved on the outer surface of each movable threaded rod (104). The adjusting component is set on the mounting base (102). Two sets of fixing bars are fixedly connected to the top of the mounting base (102). There are two fixing bars in each set. A movable worm (108) is rotatably connected between the outer surfaces of the two fixing bars in each set. Each movable worm (108) and the corresponding movable worm gear (107) are meshed. The second functional mechanism (2) is provided in two sets. Each set of the second functional mechanism (2) includes a first adapter ring (201). The first adapter ring (201) is rotatably connected to the bottom of the mounting base (102). The first adapter ring (201) and the corresponding push ring (106) are rotatably connected at one end. A connecting steel rope (202) is slidably sleeved on one end of the first adapter ring (201). A second adapter ring (203) is rotatably connected to one end of the connecting steel rope (202). Connecting strips (204) are rotatably connected to both outer surfaces of the second adapter ring (203). Connecting bolts (205) slide between the two connecting strips (204) relative to each other on their outer surfaces. The third functional mechanism (3) includes a thick plate (301). Multiple first mounting holes are equidistantly provided on the outer surfaces of both sides of the thick plate (301). The thick plate (301) is slidably sleeved on the outer surface of the connecting bolt (205) through the first mounting holes. Steel beams (302) are fixedly connected to both outer surfaces of the thick plate (301). Channel steel (304) is fixedly connected to the inner wall of one side of each steel beam (302). Side plates (303) are fixedly connected to both ends of the thick plate (301).

2. The precast concrete slab hoisting device as described in claim 1, characterized in that: The mounting base (102) has two sliding frames (110) fixedly connected to its top, and each sliding frame (110) has a connecting toothed plate (111) slidably inserted inside.

3. The precast concrete slab hoisting device as described in claim 2, characterized in that: Each of the moving worm gears (108) has a connecting gear (109) fitted on its outer surface near one end edge, and each connecting gear (109) meshes with a corresponding connecting toothed plate (111).

4. The precast concrete slab hoisting device as described in claim 3, characterized in that: The adjustment components are provided in two sets. Each set of adjustment components includes a limiting piece. There are two limiting pieces. Both limiting pieces are fixedly connected to the mounting base (102). An adjusting threaded rod (112) is rotatably connected between the outer surfaces of the two limiting pieces. An adjusting piece (113) is threadedly connected to the outer surface of the adjusting threaded rod (112). One side of the outer surface of the adjusting piece (113) is fixedly connected to one side of the outer surface of the corresponding connecting toothed plate (111).

5. The precast concrete slab hoisting device as described in claim 4, characterized in that: Two adjusting motors (103) are fixedly connected to the top of the mounting base (102), and the output end of each adjusting motor (103) is fixedly connected to one end of the corresponding adjusting threaded rod (112).

6. The precast concrete slab hoisting device as described in claim 5, characterized in that: A positioning block (206) is slidably inserted between the inner surfaces of the two connecting strips (204) in each group, and each positioning block (206) is slidably sleeved on the top of the thick plate (301).

7. The precast concrete slab hoisting device as described in claim 6, characterized in that: Each of the steel beams (302) has a plurality of second mounting holes equidistantly provided on one side of its outer surface, and each of the channel steels (304) has a plurality of third mounting holes equidistantly provided on one side of its outer surface, and each of the third mounting holes and the corresponding first mounting hole and second mounting hole are connected.

8. The precast concrete slab hoisting device as described in claim 7, characterized in that: Two sets of second mounting holes are slidably connected by movable bolts (305), and two movable blocks (306) are slidably sleeved on the outer surface of each movable bolt (305). Each movable block (306) is rotatably connected to a hanging block (307) at its bottom.

9. A method of using a precast concrete slab hoisting device, characterized in that, The device, when used in a precast concrete slab hoisting apparatus as described in claim 8, comprises the following steps: S1. Installation and lifting: The equipment can be securely connected to the existing lifting device through the connecting plate (101). Then, according to the actual specifications of the precast concrete slab, the position of the movable block (306) can be easily moved and adjusted by adding or removing the movable bolt (305). In conjunction with the existing steel cable equipment, the position of the precast concrete slab can be easily fixed and connected. Then, the equipment can be easily pulled and suspended by the existing lifting device, so that the equipment can be used with the existing steel cable to suspend the precast concrete slab. S2, Lifting Adjustment: During the suspension process of the existing lifting device, based on the influence of environmental factors on the actual precast concrete slab, the adjustment motor (103) is started by controlling the motor (103) to rotate the corresponding adjustment threaded rod (112). The rotating adjustment threaded rod (112) can move the adjustment plate (113) to its position, which in turn moves the connecting gear plate (111) to its position. During the position movement of the connecting gear plate (111), the connecting gear (109) will drive the moving worm (108) to rotate, which in turn drives the corresponding moving threaded rod (108) to rotate. The rod (104) is rotated, thereby enabling the rotating movable threaded rod (104) to easily move and adjust the corresponding push frame (105) usage position. Under the position restriction of the moving port, the push frame (105) can move and adjust the push ring (106) usage position. Under the position restriction of the mounting seat (102), the push ring (106) can move and adjust the corresponding first adapter ring (201) usage angle. Thus, the first adapter ring (201) can cooperate with the connecting steel rope (202), the second adapter ring (203) and the connecting strip (204) to adjust the overall usage angle of the third functional mechanism (3). Thus, the third functional mechanism (3) can adjust the suspension angle of the precast concrete slab through the existing steel cable equipment.