A lifting device for composite panels

Abstract

The utility model provides a kind of lifting appliance for composite board belongs to hoisting technical field, technical scheme is, a kind of lifting appliance for composite board, including lifting appliance main part, the top of lifting appliance main part is equipped with for hoisting assembly of hoisting connection, the bottom of lifting appliance main part is equipped with the U-shaped groove for the edge of composite board insertion, the single side wall of U-shaped groove is equipped with several locking screw holes, each locking screw hole is equipped with locking assembly, locking assembly includes locking bolt, locking bolt is connected with locking screw hole thread, the screw rod end of locking bolt extends into U-shaped groove and is fixedly connected with connecting rod, the free end of connecting rod away from locking bolt is penetrated second wedge and is rotatably connected with first wedge.The utility model has the beneficial effects that, the wedge-shaped structure cooperation of first wedge and second wedge in the device, locking bolt is not easy to loosen, the effect that composite board is not easy to fall.

Description

Technical Field

[0001] This utility model belongs to the field of hoisting technology, specifically relating to a hoisting tool for composite panels. Background Technology

[0002] In the construction industry, composite panels are widely used in the construction of walls, roofs, and other structures. Because composite panels typically have large dimensions and considerable weight, their production, storage, and on-site transfer all rely on lifting equipment for efficient and safe hoisting and handling. As core equipment in the composite panel distribution process, lifting equipment prevents deformation, surface scratches, or falls during hoisting, and is a crucial guarantee for ensuring construction progress and operational safety.

[0003] As shown in patent CN207209772U, the lifting device mainly includes a clamp body with a U-shaped groove, which is used for inserting the edge of the thin steel plate of the composite panel. The top of the clamp body is integrally formed with a lifting plate, which has a circular lifting hole. The entire assembly can be lifted by connecting to the hook of the lifting equipment through the lifting hole. The U-shaped groove has two screw holes spaced apart in the vertical direction, and a locking bolt is threaded into each screw hole. In use, the edge of the thin steel plate of the composite panel is inserted into the U-shaped groove, so that the upper surface of the thin steel plate abuts against the upper side wall of the U-shaped groove. Then, the two locking bolts are tightened with a wrench, so that the top of the stud is in close contact with the lower surface of the thin steel plate, thereby clamping and fixing the composite panel.

[0004] However, during hoisting, the starting, stopping, and turning operations of the lifting equipment generate high-frequency vibrations. In addition, the composite plate may sway slightly due to wind or inertia. These dynamic loads continuously act between the threaded pair of the locking bolt and the threaded hole, resulting in continuous relative friction and impact forces. After prolonged or frequent stress, the preload of the threaded pair gradually decreases, easily causing the locking bolt to loosen and leading to clamping failure. Utility Model Content

[0005] This utility model addresses the problem that existing lifting tools are prone to loosening of locking bolts and falling of composite panels during the lifting process. It provides a lifting tool for composite panels that can prevent the locking bolts from loosening and the composite panels from falling.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: a lifting device for composite panels, including a lifting device body, a lifting assembly for lifting and connecting is provided on the top of the lifting device body, and a U-shaped groove for inserting the edge of the composite panel is provided on the bottom of the lifting device body. A number of locking screw holes are provided on one side wall of the U-shaped groove, and a locking assembly is provided in each locking screw hole. The locking assembly includes a locking bolt, which is threadedly connected to the locking screw hole. The screw end of the locking bolt extends into the U-shaped groove and is fixedly connected to a connecting rod. The free end of the connecting rod away from the locking bolt passes through a second wedge and is rotatably connected to a first wedge. The connecting rod and the first wedge are clearance-fitted. The first wedge is located above the second wedge. The bottom of the first wedge is provided with a first inclined surface, and the top of the second wedge is provided with a second inclined surface that fits and conforms to the first inclined surface.

[0007] In this technical solution, the top of the lifting device body is provided with a lifting assembly for lifting connection, and the bottom is provided with a U-shaped groove for the edge of the composite board to be inserted. A locking screw hole is provided on one side wall of the U-shaped groove, and a locking bolt is threaded into the locking screw hole. The screw end of the locking bolt extends into the U-shaped groove and is fixedly connected to the connecting rod. The free end of the connecting rod away from the locking bolt passes through the second wedge and is rotatably connected to the first wedge. The connecting rod and the first wedge are in clearance fit. The first wedge is located above the second wedge and has a first inclined surface at its bottom. The top of the second wedge has a second inclined surface that fits and conforms to the first inclined surface. In use, after inserting the thin steel plate at the edge of the composite panel into the U-shaped groove, tightening the locking bolts applies pressure to the first and second wedges via the connecting rod, causing the first wedge to press against the thin steel plate at the edge of the composite panel, thus achieving clamping and fixing. During hoisting, if the locking bolts loosen, causing a decrease in clamping force and a tendency for the composite panel to fall off, the composite panel will cause the first wedge to slide slightly downwards simultaneously. Due to the wedge-shaped structure of the first and second wedges, the positive pressure of the second wedge on the first wedge will increase accordingly. This not only prevents the composite panel from continuing to slide down but also increases the positive pressure of the threaded pair, thereby preventing the locking bolts from loosening further. Ultimately, this achieves the effect of preventing the locking bolts from loosening and the composite panel from falling off.

[0008] Furthermore, there are two locking screw holes, which are spaced apart horizontally. A single locking screw hole can only provide clamping force at a single point, and the composite panel is prone to tilting at the edge due to concentrated force during hoisting. However, the two horizontally spaced screw holes correspond to two sets of locking bolts, which can form a two-point support clamping in the horizontal direction of the composite panel edge. This allows the clamping force to be evenly covered along the horizontal direction of the composite panel edge, effectively limiting the horizontal displacement of the composite panel and avoiding clamping loosening due to imbalance of force at a single point.

[0009] Furthermore, the side of the first wedge facing away from the second wedge is parallel to the sidewall of the U-shaped groove. This parallel alignment ensures complete contact between the first wedge and the composite plate, and between the composite plate and the sidewall of the U-shaped groove, maximizing the contact area. Under the same clamping force, a larger contact area generates stronger static friction, directly enhancing the constraint on the composite plate and reducing the risk of relative slippage between the composite plate and the contact surface during hoisting.

[0010] Furthermore, the side of the first wedge block opposite to the second wedge block is provided with anti-slip grooves, the grooves extending horizontally. If the composite panel becomes loose during hoisting, the main risk is vertical slippage. The horizontally extending anti-slip grooves interlock with the possible vertical sliding direction of the composite panel, forming a cross-interlocking pattern. When the composite panel tends to slide downwards, the raised parts of the anti-slip grooves can embed into the surface of the composite panel, significantly increasing the static friction in the vertical direction by increasing the mechanical interlocking resistance of the contact surface, directly counteracting the downward sliding force.

[0011] Furthermore, a connecting hole is provided on the first inclined surface, and a limiting groove communicating with the connecting hole is provided at the bottom of the connecting hole. A limiting block is installed in the limiting groove, and the outer peripheral wall of the limiting block and the inner side wall of the limiting groove are in clearance fit. The free end of the connecting rod passes through the connecting hole and is fixedly connected to the limiting block, and the outer peripheral wall of the connecting rod and the inner wall of the connecting hole are in clearance fit. This achieves rotational isolation between the locking bolt and the wedge, ensuring stable engagement of the inclined surface. When the locking bolt rotates, the limiting block rotates synchronously through the connecting rod. Because the two are fixedly connected, and the limiting block and the limiting groove are in clearance fit, and the connecting rod and the connecting hole are in clearance fit, the limiting groove forms a circumferential constraint on the limiting block. This ensures that the rotation is limited only to the connecting rod and the limiting block, and the first and second wedges do not rotate with the locking bolt. This rotational isolation ensures that the inclined surfaces of the first and second wedges always maintain a preset fitting angle, avoiding misalignment and failure of engagement due to wedge rotation, thus structurally guaranteeing the basic conditions for the wedge-shaped force-enhancing function. The first wedge is allowed to slide freely, ensuring timely triggering of the wedge self-locking mechanism. When the composite plate tends to slide down and causes the first wedge to slide down, the clearance fit between the connecting rod and the connecting hole, and the clearance fit between the limiting block and the limiting groove, provide the first wedge with sliding space along the inclined plane, without rigid constraints. This free sliding allows the first wedge to move synchronously with the composite plate, ensuring that the wedge structure can be triggered when the composite plate experiences a small displacement. The relative sliding on the inclined plane generates greater positive pressure, quickly achieving clamping and preventing self-locking delays or failures due to structural jamming. Enhanced connection reliability prevents component detachment. The limiting block is constrained within the limiting groove, and the connecting rod is fixedly connected to the limiting block. This prevents the connecting rod from axially dislodging from the connecting hole, avoiding separation of the locking assembly from the wedge. The limiting groove also radially limits the limiting block, ensuring the connecting rod always moves along the preset axis, preventing force transmission offset due to connecting rod misalignment, ensuring stable transmission of the locking bolt pressure to the wedge, and improving the overall structure's vibration and impact resistance.

[0012] Furthermore, a buffer pad is fitted around the outside of the limiting block. When the composite plate drives the first wedge to slide down, the first and second wedges will slide relative to each other. At this time, the buffer pad fitted around the limiting block can form a suitable sliding space through its own elastic compression. This elastic space can prevent jamming between the limiting block and the limiting groove, and between the first wedge and the connecting rod due to rigid contact, ensuring that the first wedge slides smoothly with the displacement of the composite plate, and keeping the inclined surfaces of the first and second wedges in contact at all times. This ensures that the wedge structure can generate a force-increasing effect in a timely manner through the inclined surface cooperation during relative sliding, and stably perform its self-locking function.

[0013] Furthermore, a guide plate is fixed to the top of the first wedge, with a guide hole running through it. A guide rod slides within the guide hole, with a clearance fit between the guide rod and the guide hole. The axial direction of the guide rod is the same as that of the locking bolt, and one end of the guide rod is fixedly connected to the inner wall of the U-shaped groove near the locking bolt. The clearance fit between the guide rod and the guide hole, combined with the alignment of the guide rod's axial direction with that of the locking bolt, provides clear motion guidance for the first wedge, restricting it to linear movement only along the guide rod's axial direction and preventing circumferential rotation or lateral displacement during sliding. This constraint ensures that the inclined surfaces of the first and second wedges always maintain a preset fitting angle and contact state, preventing misalignment due to wedge rotation. This ensures that the two wedges can stably generate a force-increasing effect through the inclined surface fit during relative sliding, reliably fulfilling the self-locking function.

[0014] Furthermore, an anti-slip pad is provided on the inner wall of the U-shaped groove away from the locking bolt. This directly increases the coefficient of friction and enhances static friction. The surface of the anti-slip pad usually has a rough texture or is made of a high-friction-coefficient material. When it comes into contact with the thin steel plate at the edge of the composite panel, it can significantly increase the coefficient of friction of the contact surface. Compared to the direct contact between the metal U-shaped groove wall and the thin steel plate, the anti-slip pad can greatly enhance the static friction between the two, effectively resisting the tendency of the composite panel to slide due to its own weight, vibration, or external forces.

[0015] Furthermore, the lifting assembly includes a connecting plate, which is fixedly connected to the top of the lifting device body. The connecting plate has connecting holes into which shackles are installed. This enhances connection stability and ensures reliable load-bearing capacity. The fixed connection between the connecting plate and the top of the lifting device body increases the contact area between the lifting assembly and the lifting device body, evenly distributing the lifting force to the lifting device body and preventing structural damage caused by concentrated stress at a single point of connection. In addition, due to the rotatable nature of the shackles, they can flexibly rotate during lifting, adjusting to the angle of the slings. When the slings change angle due to different placement positions of the composite panels or lifting directions, the rotation of the shackles prevents the slings from twisting or tangling, reducing additional stress on the slings, extending their service life, and ensuring that the lifting force is always transmitted in the correct direction, preventing the composite panels from tilting due to force deviation of the lifting device body.

[0016] Furthermore, a spring washer is provided between the head of the locking bolt and the body of the lifting device, and the spring washer is fitted over the outside of the bolt thread. When the locking bolt is tightened, the spring washer is deformed by the bolt head and the lifting device body, generating a continuous elastic reaction force. This reaction force always acts on the threaded pair of the bolt and the locking bolt hole, significantly increasing the positive pressure of their contact and preventing the positive pressure from decreasing due to the loosening of the locking bolt itself or long-term use, thus keeping the threaded connection always tight.

[0017] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: 1. The wedge-shaped self-locking structure achieves dynamic anti-loosening. When the composite plate tends to fall off, the first wedge and the second wedge slide relative to each other, increasing the positive pressure. This not only strengthens the clamping force to prevent slippage, but also increases the pressure of the threaded pair to prevent the locking bolt from loosening, forming a self-locking effect that increases force when slipping. 2. Multiple structures work together to enhance clamping stability. The double locking screw holes form two-point support, and the parallel contact surface design ensures uniform clamping force. The anti-slip texture and anti-slip pad increase friction, effectively limiting the displacement of the composite plate and improving clamping reliability. 3. The auxiliary structure ensures functional stability, and the spring washer maintains the pressure of the threaded pair to prevent initial loosening and provide long-term reliable support for the core function. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a cross-sectional schematic diagram of the locking component in a specific embodiment of this utility model.

[0020] In the diagram: 1. Lifting device body; 11. U-shaped groove; 12. Locking screw hole; 13. Anti-slip pad; 14. Spring washer; 2. Lifting assembly; 21. Connecting plate; 211. Connecting hole; 22. Shackle; 3. Locking assembly; 31. Locking bolt; 32. Connecting rod; 33. Second wedge; 331. Second inclined plane; 34. First wedge; 341. First inclined plane; 342. Anti-slip texture; 343. Connecting hole; 344. Limiting groove; 345. Limiting block; 346. Buffer pad; 35. Guide plate; 351. Guide hole; 36. Guide rod. Detailed Implementation

[0021] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0022] A type of lifting tool for composite panels, such as Figure 1-3 As shown, the device includes a lifting body 1, with a lifting assembly 2 for lifting and connection at the top and a U-shaped groove 11 for inserting the edge of the composite board at the bottom. Several locking screw holes 12 are provided on one side wall of the U-shaped groove 11, and a locking assembly 3 is provided in each locking screw hole 12. When the edge of the thin steel plate on one side of the composite board is inserted into the U-shaped groove 11, it is locked and fixed by the locking assembly 3 to ensure that it will not fall during the lifting process. The inner side wall of the U-shaped groove 11 away from the locking bolt 31 is provided with an anti-slip pad 13 to enhance the friction with the thin steel plate on one side of the composite board.

[0023] In this specific embodiment, the hoisting assembly 2 includes a connecting plate 21, which is welded and fixed to the top of the hoisting body 1. The connecting plate 21 has a connecting hole 211, and a shackle 22 is installed in the connecting hole 211. The bolt of the shackle 22 passes through the connecting hole 211, and the shackle 22 can rotate around the connecting hole 211. When in use, the shackle 22 can be connected to the sling, and the composite panel can be hoisted by the sling.

[0024] In this specific embodiment, there are two locking screw holes 12, which are distributed horizontally at intervals, and each locking screw hole 12 is provided with a corresponding locking component 3. The locking component 3 includes a locking bolt 31, which is threadedly connected to the locking screw hole 12. A spring washer 14 is provided between the head of the locking bolt 31 and the lifting body 1, and the spring washer 14 is sleeved on the outside of the screw of the locking bolt 31. The end of the screw of the locking bolt 31 extends into the U-shaped groove 11. The end of the screw has an inner hole, the center line of which coincides with the axis of the locking bolt 31. The inner wall of the inner hole has an internal thread. A connecting rod 32 is provided on the outer side of the end of the screw of the locking bolt 31. The connecting rod 32 is coaxially arranged with the locking bolt 31. The outer circular surface of the connecting rod 32 near the fixed end of the locking bolt 31 has an external thread. The fixed end of the connecting rod 32 is inserted into the inner hole of the end of the screw of the locking bolt 31, and a detachable fixed connection is achieved through threaded engagement.

[0025] A second wedge 33 and a first wedge 34 are sequentially arranged on the outer side of the connecting rod 32, with the second wedge 33 located below the first wedge 34. The top of the second wedge 33 has a second inclined surface 331, and the bottom of the first wedge 34 has a first inclined surface 341. The first inclined surface 341 and the second inclined surface 331 have the same slope and fit together. A through-hole is provided on the second wedge 33, horizontally positioned and penetrating the second inclined surface 331. The centerline of the through-hole coincides with the axis of the connecting rod 32, and the inner diameter of the through-hole is the same as the outer diameter of the connecting rod 32. The side of the second wedge 33 facing away from the first wedge 34 is parallel to the plane of the screw end of the locking bolt 31.

[0026] A connecting hole 343 is provided on the first inclined surface 341 of the first wedge 34. The connecting hole 343 is aligned with the optical aperture of the second wedge 33, and the inner diameter of the connecting hole 343 is larger than the inner diameter of the optical aperture of the second wedge 33. A limiting groove 344 is provided at the bottom of the connecting hole 343, communicating with the connecting hole 343. The limiting groove 344 is aligned with the connecting hole 343, and the inner diameter of the limiting groove 344 is larger than the inner diameter of the connecting hole 343. A limiting block 345 is assembled inside the limiting groove 344. The limiting block 345 is cylindrical, and the outer peripheral wall of the limiting block 345 is clearance-fitted with the inner side wall of the limiting groove 344. A buffer pad 346 is sleeved on the outside of the limiting block 345, and the buffer pad 346 is made of elastic material.

[0027] The limiting block 345 has an insertion hole on its side near the connecting rod 32, and the inner diameter of the insertion hole is smaller than the diameter of the connecting rod 32. The free end of the connecting rod 32 away from the locking bolt 31 first passes through the light hole of the second wedge block 33, then through the connecting hole 343, and finally inserts into the insertion hole of the limiting block 345, forming an interference fit fixed connection. When the connecting rod 32 rotates with the locking bolt 31, the limiting block 345 rotates synchronously in the limiting groove 344, thereby realizing a rotational connection with the first wedge block 34. At this time, the outer peripheral wall of the connecting rod 32 and the inner wall of the connecting hole 343 are in clearance fit.

[0028] The side of the first wedge 34 facing away from the second wedge 33 is parallel to the side wall of the U-shaped groove 11, and this side is provided with anti-slip texture 342, the texture of which extends horizontally. A guide plate 35 is welded and fixed to the top of the first wedge 34, and a guide hole 351 is provided through the guide plate 35. A guide rod 36 is slidably arranged in the guide hole 351, and there is a clearance fit between the guide rod 36 and the guide hole 351. The axial direction of the guide rod 36 is the same as that of the locking bolt 31, and one end of the guide rod 36 is welded and fixed to the inner side wall of the U-shaped groove 11 near the locking bolt 31.

[0029] Work process: First, the lifting device is assembled: the locking bolt 31 is passed through the spring washer 14, and then the locking bolt 31 is inserted into the locking screw hole 12 to form a preliminary threaded fit; next, the connecting rod 32 extending from the first wedge 34 through the connecting hole 343 is aligned with the light hole of the second wedge 33 and passed through, so that the first inclined surface 341 of the first wedge 34 and the second inclined surface 331 of the second wedge 33 are precisely fitted together, ensuring that the inclined surfaces of the two are in close contact; then, the guide hole 351 of the guide plate 35 at the top of the first wedge 34 is aligned with the guide rod 36 and fitted in, and the guide plate 35 is pushed to slide smoothly along the guide rod 36, thereby adjusting the relative position of the first wedge 34 and the second wedge 33 to ensure the stability of the overall structure; finally, the connecting rod 32 is inserted into the inner hole of the screw end of the locking bolt 31 near the fixed end, and the two are detachably fixedly connected by tightening the thread. At this time, the screw end of the locking bolt 31 is tightly abutting against the second wedge 33, and the assembly process of the lifting device is completed.

[0030] After assembly, the composite plate is clamped: the edge of the thin steel plate on one side of the composite plate is aligned with the opening of the U-shaped groove, and slowly inserted into the U-shaped groove until the thin steel plate is completely inserted into the groove; then, the locking bolt 31 is tightened with a tool. Under the threaded engagement of the locking bolt 31 and the locking screw hole 12, the locking bolt 31 moves along the axis of the locking screw hole 12 toward the inside of the U-shaped groove, and at the same time drives the connecting rod 32 fixedly connected to it to move synchronously. The limiting block 345 at the end of the connecting rod 32 away from the locking bolt 31 rotates synchronously with the connecting rod 32 in the limiting groove 344 of the first wedge block 34. Because the limiting block 345 and the limiting groove 344 are in clearance fit, and the first wedge 34 is constrained by the guide rod 36 and the guide hole 351, its rotation is limited only to the connecting rod 32 and the limiting block 345. During this process, the connecting rod 32 pushes the first wedge 34 and the second wedge 33 to translate as a whole towards the direction of the thin steel plate on one side of the composite plate. Due to the axial constraint of the guide rod 36, the first wedge 34 and the second wedge 33 only perform linear motion and do not rotate circumferentially. When the first wedge 34 moves away from the first wedge 345, the second wedge 345 rotates only linearly. When the anti-slip texture 342 on the side of the two wedges 33 contacts the surface of the thin steel plate on one side of the composite plate and forms an opposing clamp with the anti-slip pad 13 on the inner wall of the U-shaped groove, continue to tighten the locking bolt 31 until the first wedge 34 and the anti-slip pad 13 together clamp and fix the thin steel plate on one side of the composite plate. At this time, the spring washer 14 is squeezed and deformed by the head of the locking bolt 31 and the lifting body 1, generating a continuous elastic reaction force to ensure that the threaded pair of the locking bolt 31 and the locking screw hole 12 maintains a tight fit.

[0031] After the clamping process is completed, the hoisting operation is started: one end of the sling is connected and fixed to the shackle 22, and the other end is connected to the hoisting equipment; the hoisting equipment is started to pull the sling. During the hoisting process, the shackle 22 can rotate flexibly around the connecting hole 211 of the connecting plate 21 to adapt to the angle adjustment of the sling caused by the change of the composite panel placement angle and hoisting direction, so as to avoid the sling from twisting or tangling. The rotation characteristics of the shackle 22 ensure that the hoisting force is always transmitted to the lifting device body 1 in a reasonable direction, thereby driving the composite panel to rise steadily and realizing the safe hoisting of the composite panel.

[0032] If the locking bolt 31 becomes slightly loose during hoisting: When the loosening of the locking bolt 31 causes a decrease in the clamping force of the first wedge 34 on the thin steel plate on one side of the composite plate, the thin steel plate on one side of the composite plate will tend to slide down due to its own weight, and will also cause the first wedge 34 in contact with it to slide down slightly in sync; at this time, the first inclined surface 341 of the first wedge 34 slides relative to the second inclined surface 331 of the second wedge 33. Due to the mechanical characteristics of the wedge structure, the normal pressure of the second wedge 33 on the first wedge 34 gradually increases with the increase of the sliding distance; this increase The positive pressure is transmitted to the surface of the thin steel plate on one side of the composite plate through the first wedge 34, which significantly enhances the clamping force between the first wedge 34 and the thin steel plate, thereby preventing the thin steel plate on one side of the composite plate from continuing to slide down. At the same time, the buffer pad 346 outside the limiting block 345 provides a suitable space for the sliding of the first wedge 34 through its own elastic deformation, avoiding jamming between the limiting block 345 and the limiting groove 344, and between the connecting rod 32 and the connecting hole 343 due to rigid contact. This ensures that the wedge-shaped force-increasing effect is stable and timely, and ultimately ensures the safety of the composite plate during the hoisting process and prevents it from falling off.

[0033] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: 1. The wedge-shaped self-locking structure achieves dynamic anti-loosening. When the composite plate tends to fall off, the first wedge and the second wedge slide relative to each other, increasing the positive pressure. This not only strengthens the clamping force to prevent slippage, but also increases the pressure of the threaded pair to prevent the locking bolt from loosening, forming a self-locking effect that increases force when slipping. 2. Multiple structures work together to enhance clamping stability. The double locking screw holes form two-point support, and the parallel contact surface design ensures uniform clamping force. The anti-slip texture and anti-slip pad increase friction, effectively limiting the displacement of the composite plate and improving clamping reliability. 3. The auxiliary structure ensures functional stability, and the spring washer maintains the pressure of the threaded pair to prevent initial loosening and provide long-term reliable support for the core function.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lifting device for composite panels, comprising a lifting device body (1), a lifting assembly (2) for lifting and connecting is provided on the top of the lifting device body (1), and a U-shaped groove (11) for inserting the edge of the composite panel is provided on the bottom of the lifting device body (1), characterized in that, A number of locking screw holes (12) are provided on one side wall of the U-shaped groove (11). Each locking screw hole (12) is provided with a locking component (3). The locking component (3) includes a locking bolt (31). The locking bolt (31) is threadedly connected to the locking screw hole (12). The screw end of the locking bolt (31) extends into the U-shaped groove (11) and is fixedly connected to the connecting rod (32). The free end of the connecting rod (32) away from the locking bolt (31) passes through the second wedge (33) and is rotatably connected to the first wedge (34). The connecting rod (32) and the first wedge (34) are in clearance fit. The first wedge (34) is located above the second wedge (33). The bottom of the first wedge (34) is provided with a first inclined surface (341). The top of the second wedge (33) is provided with a second inclined surface (331) that fits and conforms to the first inclined surface (341).

2. The lifting tool for composite panels according to claim 1, characterized in that, There are two locking screw holes (12), which are distributed at intervals along the horizontal direction.

3. The lifting tool for composite panels according to claim 2, characterized in that, The side of the first wedge (34) facing away from the second wedge (33) is parallel to the side wall of the U-shaped groove (11).

4. The lifting tool for composite panels according to claim 3, characterized in that, The first wedge (34) has anti-slip texture (342) on the side opposite to the second wedge (33), and the texture of the anti-slip texture (342) extends in the horizontal direction.

5. The lifting tool for composite panels according to claim 1, characterized in that, The first inclined surface (341) is provided with a connecting hole (343). The bottom of the connecting hole (343) is provided with a limiting groove (344) that communicates with the connecting hole (343). A limiting block (345) is assembled in the limiting groove (344). The outer peripheral wall of the limiting block (345) and the inner side wall of the limiting groove (344) are in clearance fit. The free end of the connecting rod (32) passes through the connecting hole (343) and is fixedly connected to the limiting block (345). The outer peripheral wall of the connecting rod (32) and the inner wall of the connecting hole (343) are in clearance fit.

6. The lifting tool for composite panels according to claim 5, characterized in that, The limiting block (345) is fitted with a buffer pad (346).

7. The lifting tool for composite panels according to claim 1, characterized in that, The top of the first wedge (34) is fixed with a guide plate (35), and a guide hole (351) is provided through the guide plate (35). A guide rod (36) is slidably provided in the guide hole (351). The guide rod (36) and the guide hole (351) are in clearance fit. The axial direction of the guide rod (36) is the same as the axial direction of the locking bolt (31). One end of the guide rod (36) is fixedly connected to the inner wall of the U-shaped groove (11) near the locking bolt (31).

8. The lifting tool for composite panels according to claim 1, characterized in that, The inner wall of the U-shaped groove (11) facing away from the locking bolt (31) is provided with an anti-slip pad (13).

9. The lifting tool for composite panels according to claim 1, characterized in that, The hoisting assembly (2) includes a connecting plate (21), which is fixedly connected to the top of the hoisting body (1). The connecting plate (21) has a connecting hole (211), and a shackle (22) is installed in the connecting hole (211).

10. The lifting tool for composite panels according to claim 1, characterized in that, A spring washer (14) is provided between the head of the locking bolt (31) and the body of the lifting device (1), and the spring washer (14) is sleeved on the outside of the screw of the locking bolt (31).

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