Stone tablet head hoisting protection clamp with double-layer rubber pad

Abstract

This utility model discloses a protective clamp for lifting stone monuments with double-layer rubber pads, belonging to the technical field of stone component lifting equipment. It solves the problems of insufficient protection, inflexible adjustment, poor stability, and limited cushioning effect of existing clamps. The clamp includes a frame and at least four clamping structures. The frame is a hollow rectangular structure with sliding grooves on the crossbeams. The clamping structures are slidably connected to the crossbeams via these grooves and include locking bolts. The clamping structures also include a rotating structure and a position adjustment structure. The rotating structure connects the two, and the position adjustment structure has a rubber pad assembly at its end. This assembly includes an anti-slip connecting block, an internal rubber pad, a gourd-shaped outer rubber sleeve, and a pair of internal cushioning pads. The top of the frame has four corner lifting lugs, and the crossbeams have L-shaped connectors. This clamp allows for flexible adjustment of the clamping position and angle. The double-layer rubber structure enhances the cushioning and anti-slip effect, the frame has strong stability, and it can adapt to monuments of different sizes, ensuring lifting safety.

Description

Technical Field

[0001] This utility model provides a hoisting protection clamp, and particularly relates to a hoisting protection clamp for stone monuments with double-layer rubber pads. Background Technology

[0002] Stone monument hoisting and protection clamps are special clamping and protection devices used in the hoisting and transportation of stone monuments (such as ancient stone tablets and inscriptions). Their main function is to fix the monument through the clamping structure and provide buffer protection to avoid damage to the surface of the monument or structural cracking caused by vibration, squeezing or collision during hoisting, thus ensuring the safe transportation of stone cultural relics or large stone components.

[0003] Existing stone monument hoisting fixtures typically consist of a simple frame and fixed clamping components. The frame is often a one-piece structure, with the clamping components directly fixed to it, making it impossible to slide and adjust their position along the frame beams. This makes it difficult to adapt to monuments of different sizes and shapes. The clamping components lack rotation and telescopic adjustment structures, making it impossible to adjust the clamping angle and support points according to the surface shape of the monument, which can easily lead to unstable clamping or excessive local stress. The protective structure is mostly a single layer of ordinary rubber pads, without dedicated cushioning pads or gourd-shaped rubber outer sleeves, resulting in limited cushioning and shock absorption, and insufficient anti-slip performance. This can easily lead to relative sliding during hoisting, causing damage to the monument. In addition, the existing frame beams lack external limiting connectors for sliding grooves, resulting in poor support stability. The overall structure's adaptability and comprehensive protection of monuments need to be improved. Utility Model Content

[0004] This utility model aims to solve the problems of insufficient protection, inflexible clamping position adjustment, poor stability and limited buffering effect of existing stone monument hoisting clamps, and provides a stone monument hoisting protection clamp with double-layer rubber pads to achieve stable clamping, flexible adjustment and comprehensive buffering protection for monuments of different sizes.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a stone monument hoisting and protection clamp with double-layer rubber pads, including a frame and at least four clamping structures; the frame is a hollow rectangular frame structure, and a sliding groove is provided on the crossbeam of the frame; the clamping structures are slidably connected to the crossbeam of the frame through the sliding groove, and the clamping structure includes a locking bolt that cooperates with the sliding groove; the clamping structure also includes a rotating structure and a position adjustment structure, the rotating structure is connected between the position adjustment structure and the crossbeam of the frame, and the rotating structure is used to drive the position adjustment structure to rotate; a rubber pad assembly is connected to the end of the position adjustment structure away from the rotating structure, the rubber pad assembly includes an anti-slip connecting block, a rubber pad disposed inside the anti-slip connecting block, and a gourd-shaped rubber outer sleeve fitted above the anti-slip connecting block, and a pair of buffer rubber pads are disposed inside the rubber outer sleeve.

[0006] Furthermore, the top of the frame is provided with lifting lugs for hoisting, and there are four symmetrically arranged lifting lugs located at the four corners of the top of the frame; the crossbeam is provided with an L-shaped connector sleeved on the outside of the sliding groove to ensure the support effect of the crossbeam and limit the sliding position of the clamping structure.

[0007] Furthermore, the sliding groove is an elongated through groove opened along the length of the crossbeam, and the locking bolt passes through the sliding groove. By tightening the locking bolt, the clamping structure can be fixed to a designated position on the crossbeam.

[0008] Furthermore, the rotating structure includes a rotating seat and a rotating shaft; the rotating seat includes a connecting sleeve sleeved on the outside of the crossbeam of the frame and penetrated by a locking bolt, and a connecting rod located below the connecting sleeve and fixedly connected to the rotating shaft; the rotating shaft is sleeved on the outside of a rotating bearing assembly fixedly connected to a position adjustment structure, and a buffer spring assembly is provided between the outer shell of the rotating bearing assembly and the connecting cylinder.

[0009] Furthermore, the position adjustment structure is a telescopic rod-shaped structure, including a fixed rod and a movable rod. The movable rod can move along the length of the fixed rod to adjust the support position of the rubber pad assembly.

[0010] Furthermore, the anti-slip connecting block is a block structure and is fixedly connected to the movable rod; the movable rod is provided with a fixing bolt that passes through itself and the fixed rod, and adjusting bolts located outside the fixed rod are sleeved on both sides of the fixing bolt for adjusting the tightness.

[0011] Furthermore, the rubber jacket is gourd-shaped and has two accommodating cavities for accommodating the buffer pads. The two buffer pads are respectively disposed in the accommodating cavities, and the shape of the buffer pads is adapted to the accommodating cavities.

[0012] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages compared with the prior art: 1. By using the sliding groove on the frame beam to cooperate with the locking bolts of the clamping structure, the clamping structure can slide and be fixed along the beam, which can adapt to the hoisting of stone monuments of different sizes and improve the adaptability of the structure to monuments. 2. The lifting lugs at the four corners of the top of the frame facilitate hoisting operations, and the L-shaped connectors on the crossbeams enhance the support effect of the crossbeams and limit the sliding position of the clamping structure, thereby improving the overall structural stability. 3. The rotating seat, rotating shaft, rotating bearing assembly and buffer spring assembly of the rotating structure work together to realize the flexible rotation of the position adjustment structure. At the same time, the buffer spring assembly enhances the buffering effect and avoids rigid collisions. 4. The retractable position adjustment structure can flexibly adjust the support position of the rubber pad assembly to ensure precise clamping and adapt to different surface shapes of the monument. 5. The rubber pad assembly adopts a double-layer rubber buffer structure consisting of an internal rubber pad in the anti-slip connecting block, a gourd-shaped rubber outer sleeve, and a pair of internal buffer pads. This effectively enhances the anti-slip performance and buffering effect, preventing damage to the stone monument from squeezing, collision, or vibration during hoisting, thus achieving comprehensive protection.

[0013] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0014] Figure 1 This is a three-dimensional frame diagram of the stone monument hoisting and protection clamp with double-layer rubber pads of this utility model; Figure 2 This is a schematic diagram of the clamping structure and sliding connection of the frame of the stone monument hoisting and protection clamp with double-layer rubber pads of this utility model; Figure 3 This is an exploded view of the clamping structure of the stone monument hoisting protection clamp with double-layer rubber pads according to this utility model; Figure 4 This is a cross-sectional view of the rubber pad portion of the stone monument hoisting and protection clamp with double-layer rubber pads according to this utility model.

[0015] As shown in the figure: 1. Frame; 2. Clamping structure; 3. Sliding groove; 4. Locking bolt; 5. Rotating structure; 6. Position adjustment structure; 7. Rubber pad assembly; 8. Anti-slip connecting block; 9. Rubber pad; 10. Rubber outer sleeve; 11. Buffer pad; 12. Lifting lug; 13. Rotating seat; 14. Rotating shaft; 15. Rotating bearing assembly; 16. Buffer spring assembly; 17. Fixed rod; 18. Movable rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] like Figures 1 to 4 As shown, the stone monument hoisting protection clamp with double-layer rubber pads includes a frame 1 and at least four clamping structures 2; The frame 1 is a hollow rectangular frame structure, and a sliding groove 3 is provided on the crossbeam of the frame 1. The clamping structure 2 is slidably connected to the crossbeam of the frame 1 through the sliding groove 3. The clamping structure 2 includes a locking bolt 4 that cooperates with the sliding groove 3. The sliding groove 3 is a long strip-shaped through groove opened along the length of the crossbeam. The locking bolt 4 passes through the sliding groove 3. When in use, loosening the locking bolt 4 can push the clamping structure 2 to move along the sliding groove 3. After adjusting it to the position suitable for the stone tablet, tightening the locking bolt 4 can fix the clamping structure 2 to the designated position on the crossbeam.

[0020] The top of the frame 1 is provided with lifting lugs 12 for hoisting. There are four symmetrically arranged lifting lugs 12, which are located at the four corners of the top of the frame 1, so as to facilitate the connection between the lifting equipment such as the crane hook and the lifting lugs 12 to achieve overall hoisting. The crossbeam is provided with an L-shaped connector sleeved on the outside of the sliding groove 3. The L-shaped connector enhances the structural strength of the crossbeam and ensures the support effect. On the other hand, it limits the sliding range of the clamping structure 2 to prevent it from sliding out of the crossbeam.

[0021] The clamping structure 2 also includes a rotating structure 5 and a position adjustment structure 6. The rotating structure 5 is connected between the position adjustment structure 6 and the crossbeam of the frame 1, and is used to drive the position adjustment structure 6 to rotate. The rotating structure 5 includes a rotating seat 13 and a rotating shaft 14. The rotating seat 13 includes a connecting sleeve sleeved on the outside of the crossbeam of the frame 1 and penetrated by a locking bolt 4, and a connecting rod located below the connecting sleeve and fixedly connected to the rotating shaft 14. A rotating bearing assembly 15 fixedly connected to the position adjustment structure 6 is sleeved on the outside of the rotating shaft 14, and a buffer spring assembly 16 is provided between the outer shell of the rotating bearing assembly 15 and the connecting cylinder. When the stone monument is hoisted and there is an angular deviation or lateral force, the position adjustment structure 6 can rotate around the rotating shaft 14 through the rotating bearing assembly 15, while the buffer spring assembly 16 can absorb vibration and impact force to avoid rigid collision damage to the monument.

[0022] The end of the position adjustment structure 6 furthest from the rotating structure 5 is connected to a rubber pad assembly 7. The position adjustment structure 6 is a telescopic rod-shaped structure, including a fixed rod 17 and a movable rod 18. The movable rod 18 can move along the length of the fixed rod 17 to adjust the support position of the rubber pad assembly 7. The anti-slip connecting block 8 is a block-shaped structure, fixedly connected to the movable rod 18. The movable rod 18 is provided with a fixing bolt that passes through itself and the fixed rod 17. Adjusting bolts located outside the fixed rod 17 are sleeved on both sides of the fixing bolt for adjusting the tightness. In use, loosening the adjusting bolts can push the movable rod 18 to slide within the fixed rod 17 to adjust the contact position between the rubber pad assembly 7 and the monument. After adjustment, tightening the adjusting bolts can fix the relative position of the movable rod 18 and the fixed rod 17.

[0023] The rubber pad assembly 7 includes an anti-slip connecting block 8, a rubber pad 9 disposed inside the anti-slip connecting block 8, and a gourd-shaped rubber outer sleeve 10 fitted over the anti-slip connecting block 8. The rubber outer sleeve 10 contains a pair of cushioning rubber pads 11. The gourd-shaped rubber outer sleeve 10 has two cavities for accommodating the cushioning rubber pads 11, with each cushioning rubber pad 11 positioned within one cavity and its shape adapted to the cavity. The gourd-shaped rubber outer sleeve 10 better conforms to the surface shape of the stone monument, and the pair of cushioning rubber pads 11 inside, together with the rubber pad 9 inside the anti-slip connecting block 8, form a double-layer cushioning effect, significantly improving the anti-slip and shock absorption effect, effectively protecting the surface of the monument from damage.

[0024] In use, first, according to the size of the stone monument, loosen the locking bolts 4 of each clamping structure 2, and adjust the position of the clamping structure 2 along the sliding groove 3 of the crossbeam of the frame 1 so that the rubber pad assembly 7 corresponds to the support point of the monument; then adjust the extension and retraction of the movable rod 18 of the position adjustment structure 6 so that the rubber pad assembly 7 is close to the monument; next, adjust the angle of the position adjustment structure 6 by rotating the structure 5 so that the rubber outer sleeve 10 fits against the surface of the monument; finally, tighten the locking bolts 4 and the adjusting bolts of the position adjustment structure 6 to fix each structure, and then connect the hoisting equipment through the lifting lug 12 at the top of the frame 1 to hoist and transport the stone monument. During the process, the double-layer rubber structure of the rubber pad assembly 7 and the buffer spring assembly 16 of the rotating structure 5 work together to achieve stable and buffered hoisting.

[0025] Specifically, the frame can be constructed using existing aluminum alloy profiles or steel, assembled into a hollow rectangular structure via bolt connections or welding. The sliding grooves on the crossbeams are machined using a milling machine. L-shaped connectors are angle brackets, fixed to the outside of the crossbeams with countersunk bolts. Forged lifting lugs are fixed to the four corners of the top of the frame using a full welding process, with rust-proofing treatment applied to the welds. During clamping structure installation, the connecting sleeve of the rotating seat is first fitted onto the outside of the crossbeam, allowing the locking bolts to pass through the connecting sleeve and sliding groove, and initially secured with a wing nut. Then, one end of the rotating shaft is connected to the rotating seat connecting rod body via a key, and the other end is fitted with a rotating bearing assembly and welded to the fixing rod of the position adjustment structure. A buffer spring assembly is fitted between the outer shell of the rotating bearing assembly and the connecting cylinder, limited by a snap ring. The fixing rod and movable rod of the position adjustment structure adopt existing telescopic rod designs. Hex socket head cap bolts are used for fixing, paired with anti-loosening nuts, while the adjusting bolts are hand-tightened for quick on-site operation. In the rubber pad assembly, the anti-slip connecting block is tightened and fixed by the internal threaded hole and the external thread of the movable rod end. The rubber pad is pasted into the groove of the anti-slip connecting block through a vulcanization process. The rubber outer sleeve is fitted on top of the anti-slip connecting block with an interference fit. The buffer rubber pad is cut to fit the gourd-shaped accommodating cavity of the rubber outer sleeve and then embedded for installation. In use, first measure the length and width of the stone monument with a tape measure. Loosen the locking bolts according to the dimensions, adjust the spacing of the clamping structure by hand, and then use a wrench to turn the adjusting bolts to adjust the extension length of the movable rod so that the rubber outer sleeve fits the surface of the monument. Then tighten the locking bolts and adjusting bolts respectively. Then use a crane hook to hook the frame lifting lugs. Before hoisting, check the levelness of the frame with a level. During the hoisting process, the operator coordinates with the crane driver through a walkie-talkie to control the hoisting speed and height. After transferring to the designated position, lower it slowly. After the monument is stably placed, loosen the adjusting bolts and locking bolts. Finally, remove the entire frame to complete the hoisting operation.

[0026] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A stone monument hoisting and protective clamp with double-layer rubber pads, characterized in that, Includes a frame (1) and at least four clamping structures (2); The frame (1) is a hollow rectangular frame (1) structure, and a sliding groove (3) is provided on the crossbeam of the frame (1); the clamping structure (2) is slidably connected to the crossbeam of the frame (1) through the sliding groove (3), and the clamping structure (2) includes a locking bolt (4) that cooperates with the sliding groove (3). The clamping structure (2) also includes a rotating structure (5) and a position adjustment structure (6). The rotating structure (5) is connected between the position adjustment structure (6) and the crossbeam of the frame (1). The rotating structure (5) is used to drive the position adjustment structure (6) to rotate. The position adjustment structure (6) is connected to a rubber pad assembly (7) at one end away from the rotation structure (5). The rubber pad assembly (7) includes an anti-slip connecting block (8), a rubber pad (9) disposed inside the anti-slip connecting block (8), and a gourd-shaped rubber outer sleeve (10) sleeved on top of the anti-slip connecting block (8). A pair of buffer rubber pads (11) are provided inside the rubber outer sleeve (10).

2. The stone monument hoisting and protective clamp with double-layer rubber pads according to claim 1, characterized in that, The top of the frame (1) is provided with lifting lugs (12) for hoisting. There are four symmetrically arranged lifting lugs (12), which are located at the four corners of the top of the frame (1). The crossbeam is provided with an L-shaped connector sleeved on the outside of the sliding groove (3) to ensure the support effect of the crossbeam and limit the sliding position of the clamping structure (2).

3. The stone monument hoisting and protective clamp with double-layer rubber pads according to claim 1, characterized in that, The sliding groove (3) is a long strip-shaped through groove opened along the length direction of the crossbeam. The locking bolt (4) is inserted into the sliding groove (3). By tightening the locking bolt (4), the clamping structure (2) can be fixed to a designated position on the crossbeam.

4. The stone monument hoisting and protective clamp with double-layer rubber pads according to claim 1, characterized in that, The rotating structure (5) includes a rotating seat (13) and a rotating shaft (14); The rotating seat (13) includes a connecting sleeve sleeved on the outside of the crossbeam of the frame (1) and penetrated by the locking bolt (4), and a connecting rod located below the connecting sleeve and fixedly connected to the rotating shaft (14); The rotating shaft (14) is fitted with a rotating bearing assembly (15) which is fixedly connected to the position adjustment structure (6). A buffer spring assembly (16) is provided between the outer shell of the rotating bearing assembly (15) and the connecting cylinder.

5. The stone monument hoisting and protective clamp with double-layer rubber pads according to claim 1, characterized in that, The position adjustment structure (6) is a telescopic rod structure, including a fixed rod (17) and a movable rod (18). The movable rod (18) can move along the length of the fixed rod (17) to adjust the support position of the rubber pad assembly (7).

6. The stone monument hoisting and protective clamp with double-layer rubber pads according to claim 5, characterized in that, The anti-slip connecting block (8) is a block structure and is fixedly connected to the movable rod (18). The movable rod (18) is provided with a fixing bolt that passes through itself and the fixed rod (17). Adjusting bolts located outside the fixed rod (17) are sleeved on both sides of the fixing bolt for adjusting the tightness.

7. The stone monument hoisting and protective clamp with double-layer rubber pads according to claim 1, characterized in that, The rubber jacket (10) is gourd-shaped and has two cavities for accommodating the buffer pads (11). The two buffer pads (11) are respectively disposed in the cavities, and the shape of the buffer pads (11) is adapted to the cavities.

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