A buckle type anti-unhooking device

Abstract

The present disclosure relates to the technical field of hooks, and one embodiment of the present disclosure provides a buckle type anti-unhooking device, which comprises a hook body and a round hole, the round hole is arranged in the hook body, an anti-unhooking limiting component is arranged in the hook body, the anti-unhooking limiting component comprises an inner cavity, the inner cavity is arranged in the hook body, both sides of the inner cavity are open structures, one pair of outer ears is arranged on one side of the inner cavity, a shaft is arranged between the outer ears, an anti-unhooking stop rod is rotatably connected to the shaft, the anti-unhooking stop rod has an L-shaped structure, one end of the anti-unhooking stop rod is located inside the hook body, and the other end of the anti-unhooking stop rod penetrates through the inner cavity and is located on the outer side of the hook body. Through the above technical scheme, the technical problem that the existing common cargo hooks generally lack reliable anti-unhooking structures and are prone to unhooking due to vibration, load shaking or operation deviation in hoisting operation is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of hooks, and more specifically, to a snap-on anti-detachment hook. Background Technology

[0002] In logistics, construction, and industrial production, the hook is a core component for connecting heavy objects in lifting equipment (such as cranes and overhead cranes), and its connection stability directly determines the safety and efficiency of lifting operations. As lifting demands become increasingly heavy-duty and frequent, the shortcomings of ordinary hooks become more apparent: existing ordinary hooks generally lack reliable anti-detachment structures, making them prone to detachment during lifting operations due to vibration, load swaying, or operational deviations. This not only poses a safety risk of the heavy object falling but also interrupts the work process, severely impacting efficiency and making it difficult to adapt to lifting needs under complex conditions. Ordinary hooks often employ open or simple pin-type designs, relying solely on the curvature of the hook itself and the friction between the lifting ring and the load to maintain the connection. In actual operation, vibrations generated by the lifting equipment and swaying due to inertia after the load is lifted can easily cause relative displacement between the lifting ring and the hook. If the operator has a positional deviation when hooking the hook or fails to fully confirm that the lifting ring is securely fastened, the lifting ring can easily slip off the hook opening when the load is unevenly distributed. Unhooking accidents can not only cause damage to heavy objects and equipment, but also pose a serious threat to the safety of on-site personnel. In addition, a lot of time needs to be spent cleaning up the site and repairing equipment after the accident, resulting in a long period of work stoppage.

[0003] Furthermore, the risk of hook detachment triggers a chain reaction of problems: to reduce the risk of detachment, operators need to repeatedly check the hook status, extending the preparation time for each hoisting operation; for valuable or fragile heavy objects, additional rope binding and reinforcement are required, increasing operational complexity and labor costs; in some scenarios, due to concerns about detachment, hoisting speed and load weight must be reduced, further restricting operational efficiency. Although a few hooks are equipped with simple anti-detachment pins, they require manual insertion and removal for locking, which is cumbersome and prone to risks due to forgetting to lock. Therefore, developing a snap-on anti-detachment hook with automatic anti-detachment function and resistance to vibration and swaying has become an urgent need to ensure hoisting safety and improve operational efficiency. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a snap-on anti-detachment hook, which solves the technical problem that existing ordinary cargo hooks generally lack a reliable anti-detachment structure and are prone to detachment due to vibration, load shaking or operational deviation during hoisting operations.

[0005] According to one aspect, at least one embodiment of this disclosure provides a snap-on anti-detachment hook, comprising: The hook body and the circular hole, wherein the circular hole is formed inside the hook body; An anti-detachment limiting component is disposed in the hook body; The anti-detachment limiting component includes an inner cavity, which is opened inside the hook body. Both sides of the inner cavity are open structures. A pair of ears are provided on one end face of the hook body. A shaft is provided between the ears, and an anti-detachment stop bar is rotatably connected to the shaft.

[0006] As a further technical solution, the anti-detachment stop bar has an overall L-shaped structure, with one end of the anti-detachment stop bar located inside the hook body and the other end of the anti-detachment stop bar penetrating the inner cavity and located on the outer side of the hook body.

[0007] As a further technical solution, the surface of the anti-detachment stop bar located in the inner cavity is provided with a boss, and a fixing block is provided on the upper outer side of the hook body. A support rod is rotatably connected to the fixing block through a pin, and a sleeve groove is opened at the lower end of the support rod.

[0008] As a further technical solution, the lower end of the support rod is fitted onto the top of the boss through the sleeve groove, the side end face of the support rod is provided with a slot, the side end face of the support rod is provided with a circular groove, and a tension spring is connected between the circular groove and the side end face of the hook body.

[0009] As a further technical solution, the inner side of the slot is an inclined V-shaped opening structure, and one end of the anti-disengagement lever can be inserted into the slot when it is in the open state.

[0010] As a further technical solution, the lower end of the anti-detachment stop bar is an inclined structural surface, and the inclined part of the lower end of the anti-detachment stop bar is attached to the inner side of the hook groove of the hook body.

[0011] As a further technical solution, a widened protrusion is provided on one side of the lower end of the anti-detachment bar.

[0012] As a further technical solution, one side of the sleeve groove has an open structure, and the sleeve groove and the boss are tightly fitted together.

[0013] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the anti-detachment limiting component completely solves the problem of unreliability in traditional hook anti-detachment designs through a dual protection design of mechanical locking and elastic reset. The L-shaped anti-detachment stop bar rotates flexibly around the shaft, with its inner end completely blocking the hook slot entrance and its outer end facilitating manual operation. The tight fit between the boss and the support rod sleeve groove forms a rigid lock, preventing the stop bar from shifting due to impact from the suspended load. The tension spring provides continuous elastic tension, ensuring that the sleeve groove always fits against the boss, resisting the effects of vibration and swaying. The V-shaped slot provides temporary fixation when the stop bar is open, preventing the stop bar from automatically resetting during operation and improving hooking convenience. This structure can seal the hook slot in real time, firmly limiting the position of the suspended load even under complex working conditions such as load swaying and equipment vibration, fundamentally eliminating the risk of detachment and ensuring operational safety.

[0014] The inclined structural surface at the lower end of the anti-slip stop conforms to the arc-shaped contour of the hook groove, eliminating gaps and preventing rope slippage. The widened boss increases the contact area with the rope, distributing pressure to prevent stop deformation and expanding the coverage area to reduce the risk of edge disengagement. The open structure of the slot facilitates quick assembly and disassembly of the support rod, simplifying maintenance. The cooperation between the tension spring and the circular groove ensures smooth return of the support rod, preventing damage to components from rigid collisions. These detailed designs enhance anti-slip performance while maintaining ease of operation, ensuring safety without compromising lifting efficiency, and adapting to high-frequency lifting needs in logistics, construction, and other scenarios. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; In the diagram: 1. Hook body; 2. Circular hole; 3. Anti-detachment limiting component; 3-1. Inner cavity; 3-2. Outer ear; 3-3. Shaft; 3-4. Anti-detachment stop bar; 3-5. Boss; 3-6. Fixing block; 3-7. Support rod; 3-8. Sleeve groove; 3-9. Slot; 3-10. Circular groove; 3-11. Tension spring; 4. Widened protrusion. Detailed Implementation

[0017] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0020] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-3 As shown, a snap-on anti-detachment hook according to an embodiment of the present disclosure includes: The hook body 1 and the circular hole 2 are formed inside the hook body 1; Anti-detachment limiting component 3, wherein the anti-detachment limiting component 3 is disposed in the hook body 1; The anti-detachment limiting component 3 includes an inner cavity 3-1, which is formed inside the hook body 1. Both sides of the inner cavity 3-1 are open. An outer ear 3-2 is provided on one end face of the hook body 1. A shaft 3-3 is provided between the outer ears 3-2. An anti-detachment stop rod 3-4 is rotatably connected to the shaft 3-3. The anti-detachment stop rod 3-4 has an overall L-shaped structure. One end of the anti-detachment stop rod 3-4 is located inside the hook body 1, and the other end of the anti-detachment stop rod 3-4 passes through the inner cavity 3-1 and is located on the outer side of the hook body 1. The anti-detachment stop bar 3-4 in 3-1 has a boss 3-5 on its surface. The upper outer side of the hook body 1 has a fixing block 3-6. A support rod 3-7 is rotatably connected to the fixing block 3-6 via a pin. The lower end of the support rod 3-7 has a sleeve groove 3-8. The lower end of the support rod 3-7 is fitted onto the top of the boss 3-5 through the sleeve groove 3-8. The side end face of the support rod 3-7 has a retaining groove 3-9 and a circular groove 3-10. A tension spring 3-11 connects the circular groove 3-10 and the side end face of the hook body 1.

[0024] In some examples, in order to achieve real-time shielding and anti-detachment protection of the hook groove of the hook body 1 and to prevent the load from falling off due to vibration or tilting during the hoisting process, an anti-detachment limiting component 3 is designed. This component includes an inner cavity 3-1 inside the hook body 1 to provide rotation and movement space for the anti-detachment stop bar 3-4, and the open structure on both sides ensures that the two ends of the anti-detachment stop bar 3-4 can be flexibly extended or retracted.

[0025] One pair of ears 3-2 on one side end face of the hook body 1 provides fixed support for the shaft 3-3. The shaft 3-3 passes through the anti-detachment stop bar 3-4 to achieve rotational fitting, so that the L-shaped anti-detachment stop bar 3-4 can rotate around the shaft 3-3. The end located inside the hook body 1 can block the hook groove entrance when rotating, while the outer end serves as the operating end for easy adjustment.

[0026] The boss 3-5 on the surface of the anti-slip stop 3-4 located in the inner cavity 3-1 provides a lower support point for the support rod 3-7. The upper fixing block 3-6 on the outer side of the hook body 1 is rotatably connected to the support rod 3-7 through a pin. The sleeve groove 3-8 at the lower end of the support rod 3-7 is fitted onto the top of the boss 3-5. When the inner end of the anti-slip stop 3-4 blocks the hook groove, the cooperation between the sleeve groove 3-8 and the boss 3-5 can limit the reverse rotation of the anti-slip stop 3-4 and prevent the stop from shifting due to the impact of the suspended object. The slot 3-9 on the side end face of the support rod 3-7 can further cooperate with the surface structure of the hook body 1 to enhance the locking stability. The tension spring 3-11 connected to the side end face of the hook body 1 by the circular groove 3-10 can provide continuous elastic tension for the support rod 3-7, so that the sleeve groove 3-8 is always tightly fitted to the boss 3-5, avoiding the two from separating due to vibration, forming a double anti-slip guarantee.

[0027] The L-shaped anti-slip lever 3-4 is designed to cover the hook groove while reducing interference with the loading and unloading of the load. The length of the inner end is adapted to the width of the hook groove to ensure complete coverage. The tight fit between the shaft 3-3 and the outer ear 3-2 ensures that the anti-slip lever 3-4 rotates smoothly and avoids jamming that may affect operation.

[0028] During operation, rotating the outer end of the anti-detachment stop bar 3-4 opens the hook groove on the inner end. After hoisting, releasing the outer end causes the tension spring 3-11 to pull the support rod 3-7, which in turn moves the anti-detachment stop bar 3-4 back to its original position, blocking the hook groove. The elastic reset ensures real-time protection, while the mechanical limit ensures structural stability. All components work together to block the hook groove and prevent detachment, meeting the safety hoisting requirements of the snap-on anti-detachment hook.

[0029] For example, such as Figure 3 As shown, the inner side of the slot 3-9 has an inclined V-shaped opening structure, and one end of the anti-disengagement rod 3-4 can be inserted into the slot 3-9 when it is in the open state.

[0030] In some examples, the inclined V-shaped opening structure inside the slot 3-9 can guide one end of the anti-detachment bar 3-4 to be accurately inserted into the slot 3-9 when the anti-detachment bar 3-4 is opened. The V-shaped inclined surface can automatically calibrate the insertion position, avoiding difficulty in engagement due to alignment deviation. The inclined structure can increase the contact area between the bar and the slot 3-9, improve the locking strength after engagement, and prevent the anti-detachment bar 3-4 from accidentally falling off due to vibration when it is open, ensuring the stability of the operation before hoisting.

[0031] For example, such as Figure 3 As shown, the lower end of the anti-detachment stop bar 3-4 is an inclined structural surface, and the inclined part of the lower end of the anti-detachment stop bar 3-4 is attached to the inner side of the hook groove of the hook body 1.

[0032] In some examples, the inclined structural surface at the lower end of the anti-slip stop 3-4 can closely fit the arc-shaped contour of the inner side of the hook groove of the hook body 1, eliminating the gap between the stop and the hook groove and preventing the lifting rope from slipping out of the gap. The adaptive design of the inclined angle can enhance the lateral limiting effect of the stop on the rope. Even if the rope sways slightly during lifting, the rope position can be maintained by the blocking effect of the inclined surface, while reducing the rigid collision between the stop and the hook groove and reducing component wear.

[0033] For example, such as Figure 2 As shown, a widened protrusion is provided on one side of the lower end of the anti-detachment stop bar 3-4.

[0034] In some examples, the widened protrusion on one side of the lower end of the anti-slip stop 3-4 increases the contact area between the stop and the hoisting rope, dispersing the local pressure of the rope on the stop and preventing deformation or breakage of the lower end of the stop due to long-term use. The widened structure also further expands the coverage of the hook groove entrance, reducing the risk of the rope slipping off the edge of the stop. At the same time, the protrusion 3-5 can serve as a stress fulcrum, enhancing the overall structural strength of the stop and extending its service life.

[0035] For example, such as Figure 3 As shown, one side of the groove 3-8 has an open structure, and the groove 3-8 is tightly fitted with the boss 3-5.

[0036] In some examples, the open structure on one side of the slot 3-8 facilitates the quick insertion or removal of the support rod 3-7 from the boss 3-5, simplifying the disassembly and maintenance process of the anti-detachment stop bar 3-4. The tight fit between the slot 3-8 and the boss 3-5 eliminates gaps, ensuring the support rod 3-7's precise and effective restraint on the boss 3-5, preventing displacement of the anti-detachment stop bar 3-4 due to loosening. This tight fit also reduces noise and wear caused by vibration.

[0037] In actual use: Before hoisting, manually rotate the end of the anti-detachment stop bar 3-4 located on the outside of the hook body 1, causing it to rotate around the shaft 3-3. The inner end of the anti-detachment stop bar 3-4 then opens the hook groove of the hook body 1. At this time, one end of the anti-detachment stop bar 3-4 inserts into the V-shaped slot 3-9 of the support rod 3-7, achieving temporary fixation in the open state. After placing the lifting ring or rope of the load into the hook groove, rotate the outer end of the anti-detachment stop bar 3-4 in the opposite direction, causing it to disengage from the slot 3-9. The tension spring 3-11 pulls the support rod 3-7 back to its original position. The sleeve groove 3-8 at the lower end of the support rod 3-7 tightly fits onto the boss 3-5 of the anti-detachment stop bar 3-4, restricting the reverse rotation of the anti-detachment stop bar 3-4. The inner end of the anti-detachment stop bar 3-4 fits against the inner side of the hook groove, forming a closed protection. During hoisting, the inclined structural surface at the lower end of the anti-detachment stop bar 3-4 and the widened boss 43-5 further prevent the rope from swaying and avoid detachment. After the operation is completed, the outer end can be rotated again to open the stop bar and remove the hoisted object. No complicated tools are required throughout the process, achieving a combination of convenient operation and reliable anti-detachment.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A snap-on anti-detachment hook, characterized in that, include: The hook body (1) and the circular hole (2) are provided inside the hook body (1); Anti-detachment limiting component (3), wherein the anti-detachment limiting component (3) is disposed in the hook body (1); The anti-detachment limiting component (3) includes an inner cavity (3-1), which is opened inside the hook body (1). Both sides of the inner cavity (3-1) are open structures. A pair of ears (3-2) are provided on one end face of the hook body (1). A shaft (3-3) is provided between the ears (3-2). An anti-detachment stop bar (3-4) is rotatably connected to the shaft (3-3).

2. The snap-on anti-detachment hook according to claim 1, characterized in that, The anti-detachment stop bar (3-4) has an overall L-shaped structure. One end of the anti-detachment stop bar (3-4) is located inside the hook body (1), and the other end of the anti-detachment stop bar (3-4) passes through the inner cavity (3-1) and is located on the outer side of the hook body (1).

3. A snap-on anti-detachment hook according to claim 2, characterized in that, The surface of the anti-detachment stop bar (3-4) located in the inner cavity (3-1) is provided with a boss (3-5). A fixing block (3-6) is provided on the upper outer side of the hook body (1). A support rod (3-7) is rotatably connected to the fixing block (3-6) by a pin. A sleeve groove (3-8) is opened at the lower end of the support rod (3-7).

4. A snap-on anti-detachment hook according to claim 3, characterized in that, The lower end of the support rod (3-7) is fitted onto the top of the boss (3-5) through the sleeve groove (3-8). The side end face of the support rod (3-7) is provided with a slot (3-9) and a circular groove (3-10). A tension spring (3-11) is connected between the circular groove (3-10) and the side end face of the hook body (1).

5. A snap-on anti-detachment hook according to claim 4, characterized in that, The inner side of the slot (3-9) has an inclined V-shaped opening structure, and one end of the anti-disengagement rod (3-4) can be inserted into the slot (3-9) when it is in the open state.

6. A snap-on anti-detachment hook according to claim 1, characterized in that, The lower end of the anti-detachment stop bar (3-4) is an inclined structural surface, and the inclined part of the lower end of the anti-detachment stop bar (3-4) is attached to the inner side of the hook groove of the hook body (1).

7. A snap-on anti-detachment hook according to claim 1, characterized in that, A widened protrusion (4) is provided on one side of the lower end of the anti-detachment bar (3-4).

8. A snap-on anti-detachment hook according to claim 3, characterized in that, The sleeve groove (3-8) has an open structure on one side, and the sleeve groove (3-8) fits tightly with the boss (3-5).

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