A steel structure profile hoisting clamp with self-locking function

Abstract

This utility model relates to the field of steel production technology and discloses a steel structure profile lifting clamp with a self-locking function, including a connecting ring, a drive assembly, and a locking assembly. The drive assembly includes a cross-linked drive arm and a clamping arm. The locking assembly includes a first connecting rod and a second connecting rod fixed to the drive arm. The first connecting rod has a locking rod, and the second connecting rod has a cavity and a rotating hook. When the clamping arm clamps, the locking rod simultaneously enters the cavity, and the hook rotates back to the rear of the locking rod by gravity to form a structural block, achieving mechanical locking. This utility model achieves dual self-locking by gravity and machinery through the addition of a mechanical lock, greatly improving safety. Magnetic adsorption enhances locking stability, and replaceable hooks improve versatility.

Description

Technical Field

[0001] This utility model relates to the field of steel production technology, and in particular to a steel structure profile hoisting clamp with a self-locking function. Background Technology

[0002] In modern construction and bridge engineering, steel structures are widely used due to their high strength and prefabrication advantages. The hoisting and handling of steel structural profiles is a crucial step in the construction process, typically requiring specialized hoisting clamps. Currently, one widely used type on the market utilizes lever principles and gravity self-locking. The ingenious design of this type of clamp lies in the fact that the greater the weight of the steel itself, the greater the clamping force converted through the lever mechanism, thus achieving reliable clamping of the steel.

[0003] However, in the complex construction environment, the hoisting process is not always smooth. Steel structural members being hoisted, especially when working at heights, are prone to swaying, shaking, or bumping due to wind, equipment start-up and shutdown inertia, or collisions with surrounding obstacles.

[0004] Under such unstable working conditions, the sling may slacken momentarily, causing the weight of the steel acting on the clamp to temporarily disappear or decrease drastically. For traditional clamps that rely entirely on gravity to maintain clamping, this momentary weightlessness will directly lead to the loss of clamping force in the clamping arms, and the arms may open instantly. Once the clamping arms open, even if the sling immediately tightens again, it is highly likely that the clamping position will shift and fail to effectively restore clamping, thus causing the steel to slip or even fall, posing a serious safety accident and a huge threat to personnel and property on site.

[0005] Therefore, this utility model proposes a steel structure profile hoisting clamp with a self-locking function to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problem that existing steel structure profile lifting clamps rely solely on gravity for self-locking, and that the clamp arms may accidentally open due to shaking or collision during lifting, thus causing safety risks, this utility model aims to provide a steel structure profile lifting clamp with a self-locking function that has an improved structure and can effectively solve the above problems.

[0007] This utility model provides a steel structure profile hoisting clamp with a self-locking function, including a connecting ring and a drive assembly; the drive assembly includes a first drive arm and a second drive arm pivotally connected to the bottom of the connecting ring, and a second clamping arm and a first clamping arm respectively rotatably connected to the first drive arm and the second drive arm via a connecting shaft; the clamp also includes a locking assembly.

[0008] The locking assembly includes a first connecting rod and a second connecting rod that are respectively fixedly connected to the first drive arm and the second drive arm.

[0009] Furthermore, a locking rod is fixed to the front end of the first connecting rod, and a cavity is opened inside the second connecting rod for the locking rod to enter. A hook is rotatably connected inside the cavity. The hook has a hook portion, which is positioned so that after the locking rod enters the cavity, it can rotate back to the rear of the movement path of the locking rod by gravity, thereby forming a structural block on the locking rod and preventing the locking rod from exiting the cavity.

[0010] Preferably, in order to determine the rotation center of the hook and ensure its flexible rotation, the hook is rotatably connected to the inside of the second connecting rod via a shaft.

[0011] Preferably, in order to achieve mechanical linkage between the locking rod and the hook, a drive rod is also connected to the hook. At least a part of the drive rod is cleverly positioned on the necessary movement path of the locking rod entering the cavity. When the locking rod moves forward, it will push the drive rod, thereby causing the hook to rotate and move out of position.

[0012] Preferably, in order to cooperate with the subsequent magnetic-assisted locking function, a metal limiting plate is fixed on the hook, and the metal limiting plate exists as the target component for magnetic adsorption.

[0013] Furthermore, to prevent the hook from unexpectedly rebounding due to equipment vibration in the locked position, a magnet is fixed inside the second connecting rod. The position of the magnet precisely corresponds to the position of the metal limiting plate in the locked state. The metal limiting plate is firmly attracted by magnetic attraction, thereby ensuring the absolute stability of the locked state.

[0014] Preferably, to improve the versatility of the clamp to accommodate steel of different specifications, the bottom of both the first and second clamp arms are detachably equipped with replacement components, so that the parts in direct contact with the steel can be replaced according to operational needs.

[0015] In one specific implementation, the replacement component includes a housing fixed to the bottom of the clamping arm and a connecting block that is pluggably fitted inside the housing. This pluggable structural design is the basis for realizing the quick replacement function.

[0016] Preferably, in order to simplify the number of parts in the replacement assembly and improve the overall structural strength, the replacement assembly further includes a hook body, which is integrally formed with the connecting block, avoiding additional connection points and improving reliability.

[0017] Preferably, in order to achieve reliable fixing and convenient disassembly of the connecting block within the housing, the connecting block is fastened to the housing by bolts. Bolts are a standard and reliable fastener, which is convenient for on-site personnel to operate using conventional tools.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model solves the safety hazard of accidental opening of the clamp arm and falling of heavy objects when the clamp relies solely on gravity for self-locking in the prior art during hoisting due to shaking or collision. It achieves the synergistic effect of mechanical and gravity self-locking, greatly improving the safety and reliability of hoisting operations.

[0020] 2. This utility model solves the problem that the hook in the locking assembly may jump unexpectedly due to equipment vibration after locking by setting a metal limiting plate on the hook and setting a magnet at the corresponding position. This achieves the technical effect of magnetic adsorption to maintain the locked state, and further ensures the stability and reliability of the self-locking function.

[0021] 3. This utility model solves the problem of traditional clamps having a single structure, poor applicability, and incompatibility with various steel materials of different specifications and shapes, which leads to the need to equip them with a variety of special clamps, by designing the hook body at the clamping end as a detachable and replaceable component consisting of a connecting block, a housing, and bolts. It achieves the technical effect of quick replacement to adapt to different work requirements, significantly enhances the versatility of the clamps, and reduces the overall cost of using the tool. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a steel structure profile hoisting clamp with a self-locking function proposed in this utility model.

[0023] Figure 2 This is a schematic diagram of the connecting ring of a steel structure profile hoisting clamp with self-locking function proposed in this utility model;

[0024] Figure 3 Exploded view of a replacement component for a steel structure profile hoisting clamp with self-locking function proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the first connecting rod of a steel structure profile hoisting clamp with a self-locking function proposed in this utility model.

[0026] Legend:

[0027] 1. Drive assembly; 101. First clamping arm; 102. Second clamping arm; 103. Connecting shaft; 104. First drive arm; 105. Second drive arm; 2. Locking assembly; 201. First connecting rod; 202. Second connecting rod; 203. Locking rod; 204. Hook; 205. Shaft; 206. Drive rod; 207. Limiting plate; 208. Magnet; 3. Replacement assembly; 301. Hook body; 302. Connecting block; 303. Housing; 304. Bolt; 4. Connecting ring. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 4 This utility model provides a steel structure profile hoisting clamp with a self-locking function, which aims to solve the safety hazard of existing hoisting clamps that mainly rely on gravity self-locking, where the clamping arms may accidentally open and cause heavy objects to fall off when subjected to shaking or collision.

[0031] like Figure 1 and Figure 2 As shown, the steel structure profile hoisting clamp with self-locking function includes a connecting ring 4 and a drive assembly 1 pivotally connected to the bottom of the connecting ring 4. The drive assembly 1 includes a first drive arm 104 and a second drive arm 105 pivotally connected to the bottom of the connecting ring 4. The drive assembly 1 also includes a second clamping arm 102 and a first clamping arm 101. The first drive arm 104 is rotatably connected to the second clamping arm 102 through a connecting shaft 103, and the second drive arm 105 is rotatably connected to the first clamping arm 101 through a connecting shaft 103, thereby forming a cross-linked lever structure.

[0032] The clamp also includes a locking assembly 2, which includes a first connecting rod 201 and a second connecting rod 202. The first connecting rod 201 is fixedly connected to the first drive arm 104, and the second connecting rod 202 is fixedly connected to the second drive arm 105, so that the action of the locking assembly 2 is synchronized with the clamping action of the drive assembly 1; specifically, please refer to Figure 4The first connecting rod 201 has a locking rod 203 fixed to its front end; the second connecting rod 202 has a cavity inside for the locking rod 203 to enter, and a hook 204 is rotatably connected inside the cavity. The hook 204 is rotatably connected to the inside of the second connecting rod 202 via a shaft 205. A drive rod 206 is also connected to the hook 204. At least a part of the drive rod 206 is arranged on the movement path of the locking rod 203 entering the cavity. When the drive arm retracts, the locking rod 203 moves forward and pushes the drive rod 206, thereby causing the hook 204 to rotate upward around the shaft 205 to open the passage; the hook 204 has a hook portion, the position of which is... The hook 204 is designed so that after the locking lever 203 is fully inserted into the cavity, it can rotate back to the rear of the movement path of the locking lever 203 by gravity. Its hook part forms a structural block on the locking lever 203, preventing the first connecting rod 201 from separating from the second connecting rod 202. To further improve the locking reliability, a metal limiting plate 207 is also fixed on the hook 204. A magnet 208 is also fixed inside the second connecting rod 202. The magnet 208 is correspondingly set with the metal limiting plate 207 and is used to generate a magnetic attraction force on the metal limiting plate 207 when the hook 204 is in the blocking position, so as to prevent the hook 204 from accidentally jumping off due to equipment vibration.

[0033] To further enhance the applicability of the steel structure profile lifting clamp with self-locking function, a replacement component 3 is detachably installed at the bottom of both the first clamping arm 101 and the second clamping arm 102. The replacement component 3 is used to directly clamp the steel structure profile, and its structure can be quickly replaced as needed.

[0034] Please refer to the following carefully. Figure 3 The structure of the replacement component 3 is described in detail below: The replacement component 3 includes a hook body 301, a connecting block 302, a housing 303, and bolts 304. The housing 303 is fixed to the bottom of the first clamping arm 101 or the second clamping arm 102. The housing 303 has an insertion cavity inside to accommodate the connecting block 302. The connecting block 302 is integrally formed with the hook body 301. The shape and size of the connecting block 302 are adapted to the insertion cavity of the housing 303, allowing it to be smoothly inserted or removed. In the assembled state, the connecting block 302 is fastened to the inside of the housing 303 by bolts 304. This detachable connection structure, consisting of the housing 303, the connecting block 302, and the bolts 304, ensures that when different shapes of steel need to be lifted, the operator only needs to unscrew the bolts 304 to easily replace the entire connecting block 302 hook body assembly with different hook shapes 301, thereby greatly expanding the versatility and economy of the clamp.

[0035] Based on the above embodiments, the present invention may further include the following preferred technical solutions:

[0036] In a preferred embodiment, to determine the rotation center of the hook 204, the hook 204 is rotatably connected to the inside of the second connecting rod 202 via the shaft 205.

[0037] As another preferred embodiment, in order to realize the linkage between the locking rod 203 and the hook 204, a drive rod 206 is connected to the hook 204, and at least a part of the drive rod 206 is arranged on the movement path of the locking rod 203 entering the cavity.

[0038] As another preferred embodiment, a metal limiting plate 207 is fixed on the hook 204 to cooperate with subsequent magnetic locking.

[0039] Furthermore, to prevent the hook 204 from accidentally rebounding due to vibration in the locked position, a magnet 208 is also fixed inside the second connecting rod 202. The magnet 208 is correspondingly set with the metal limiting plate 207. When the hook 204 is in the blocking position, the magnet 208 attracts the metal limiting plate 207 to enhance the stability of the locked state.

[0040] As a preferred parallel implementation, the structure of the replacement component 3 can be further refined. The replacement component 3 includes a housing 303 fixed to the bottom of the clamping arm and a connecting block 302 that is pluggably fitted inside the housing 303. This structure is the basis for achieving quick replacement.

[0041] To simplify the structure of replacement component 3 and improve its strength, replacement component 3 also includes hook body 301, which is integrally formed with connecting block 302.

[0042] To ensure reliable fixing and convenient disassembly of the replacement component 3, the connecting block 302 is fastened to the housing 303 by bolts 304.

[0043] The working principle of this self-locking steel structure profile hoisting clamp is as follows:

[0044] When the hoisting equipment applies an upward lifting force through the connecting ring 4, the connection point of the first drive arm 104 and the second drive arm 105, which are pivotally connected to the connecting ring 4, serves as a fulcrum. Their lower ends approach each other under the action of gravity and leverage. This movement is transmitted to the second clamping arm 102 and the first clamping arm 101 respectively through the connecting shaft 103, forcing the lower ends of the first clamping arm 101 and the second clamping arm 102 to rotate towards each other, thereby driving the replacement component 3 installed at its bottom to clamp the steel and achieve the first gravity self-locking.

[0045] Simultaneously with the clamping action, the locking assembly 2 moves in sync. The first connecting rod 201 fixed on the first drive arm 104 and the second connecting rod 202 fixed on the second drive arm 105 move closer together. The locking rod 203 at the front end of the first connecting rod 201 moves into the internal cavity of the second connecting rod 202. During this process, the front end of the locking rod 203 pushes the drive rod 206 located on its movement path. The drive rod 206 drives the hook 204 to rotate upward around the shaft 205, making way for the locking rod 203. When the locking rod 203 is fully inside the cavity of the second connecting rod 202, the hook 204 falls back under its own gravity. Its hook structure directly blocks the back of the locking rod 203. At this time, the metal limiting plate 207 fixed on the hook 204 is attracted by the magnet 208 inside the second connecting rod 202, further ensuring that the hook 204 will not jump accidentally. This forms a purely mechanical second layer of locking, completely preventing the risk of the clamping arm opening due to accidental shaking or weightlessness.

[0046] When the hook body 301 needs to be replaced to adapt to different profiles, simply unscrew the bolt 304 to pull the connecting block 302 together with its integrally formed hook body 301 out of the housing 303, then insert the new replacement component 3 and tighten it with the bolt 304. The operation is simple and quick.

[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A steel structure profile lifting clamp with a self-locking function, comprising: Connecting ring (4); The drive assembly (1) includes a first drive arm (104) and a second drive arm (105) pivotally connected to the bottom of the connecting ring (4), and a second clamping arm (102) and a first clamping arm (101) respectively rotatably connected to the first drive arm (104) and the second drive arm (105) via a connecting shaft (103); The feature is that the steel structure profile hoisting clamp with self-locking function further includes a locking component (2); The locking assembly (2) includes a first connecting rod (201) and a second connecting rod (202) fixedly connected to the first driving arm (104) and the second driving arm (105) respectively. The front end of the first connecting rod (201) is fixed with a locking rod (203). The interior of the second connecting rod (202) is provided with a cavity for the locking rod (203) to enter, and a hook (204) is rotatably connected in the cavity. The hook (204) has a hook portion. The position of the hook portion is set so that after the locking rod (203) enters the cavity, it can rotate back to the rear of the movement path of the locking rod (203) by gravity, so as to form a structural block on the locking rod (203).

2. The steel structure profile hoisting clamp with self-locking function according to claim 1, characterized in that, The hook (204) is rotatably connected to the inside of the second connecting rod (202) via a shaft (205).

3. The steel structure profile hoisting clamp with self-locking function according to claim 2, characterized in that, The hook (204) is also connected to a drive rod (206), at least a portion of which is located on the movement path of the locking rod (203) as it enters the cavity.

4. The steel structure profile hoisting clamp with self-locking function according to claim 2, characterized in that, A metal limiting plate (207) is fixed on the hook (204).

5. The steel structure profile hoisting clamp with self-locking function according to claim 4, characterized in that, The second connecting rod (202) also has a magnet (208) fixed inside. The magnet (208) is correspondingly arranged with the metal limiting plate (207) and is used to generate a magnetic attraction force on the metal limiting plate (207) when the hook (204) is in the blocking position.

6. The steel structure profile hoisting clamp with self-locking function according to claim 1, characterized in that, Replacement components (3) are detachably mounted on the bottom of both the first clamping arm (101) and the second clamping arm (102).

7. The steel structure profile hoisting clamp with self-locking function according to claim 6, characterized in that, The replacement component (3) includes a housing (303) fixed to the bottom of the clamping arm, and a connecting block (302) that is pluggably fitted inside the housing (303).

8. The steel structure profile hoisting clamp with self-locking function according to claim 7, characterized in that, The replacement component (3) also includes a hook (301) integrally formed with the connecting block (302).

9. The steel structure profile hoisting clamp with self-locking function according to claim 7, characterized in that, The connecting block (302) is fastened to the housing (303) by bolts (304).

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