A lifting hook and its unhooking method

Abstract

This invention discloses a lifting hook and its unhooking method. The lifting hook includes a connecting seat, on which a rotatable locking rod, locking ring, and lifting rod are mounted. When the lifting hook is closed, the limiting mechanism is in a first engaged position, and the lifting rod is inserted into the locking ring. When the lifting hook is opened, the limiting mechanism is in a second engaged position, the locking ring rotates to an inclined position, and the lifting rod can rotate and disengage from the locking ring. An electric push rod is installed in the connecting seat to press the locking rod, causing the limiting mechanism to rotate from the first engaged position to the second engaged position. The limiting mechanism in the first engaged position limits the locking ring, ensuring the lifting hook remains in a stable and effective closed state, effectively preventing unhooking during lifting. By energizing the electric push rod, the limiting mechanism rotates, releasing the locking ring and causing it to rotate to an inclined position, allowing the lifting rod to disengage from the locking ring, thus achieving rapid and safe unhooking of the lifting rod.

Description

Technical Field

[0001] This invention relates to the field of lifting hook technology, and more specifically to a lifting hook and its unhooking method. Background Technology

[0002] A crane hook is a connecting accessory required for high-altitude transportation of goods by conveying equipment. It is used to connect the rack that carries the goods and is mainly used for transporting goods at high heights, such as in construction, bridges, and structures.

[0003] In port cargo loading and unloading, hooks are widely used on various lifting equipment. Most of the hooks currently used in ports are traditional mechanical hooks, which not only cannot achieve safe and fast automatic unhooking, but also pose a risk of unhooking during the swinging process. Summary of the Invention

[0004] The purpose of this invention is to provide a lifting hook and its unhooking method, which can effectively prevent detachment during lifting and safely perform the unhooking operation.

[0005] To address this, the present invention provides a lifting hook, comprising a connecting seat, wherein a rotatable locking rod, a locking ring, and a lifting rod are provided on the connecting seat; a first elastic element abutting against the locking rod and a second elastic element abutting against the locking ring are provided within the connecting seat, and a locking limiting mechanism is provided between the locking rod and the locking ring; when the lifting hook is closed, the limiting mechanism is in a first locking position, and the lifting rod is inserted into the locking ring; when the lifting hook is opened, the limiting mechanism is in a second locking position, the locking ring rotates to an inclined position, and the lifting rod can rotate out of the locking ring; an electric push rod is installed within the connecting seat, the electric push rod being used to press the locking rod, so that the limiting mechanism rotates from the first locking position to the second locking position.

[0006] Preferably, the limiting mechanism includes a first limiting step disposed at the end of the locking rod and a second limiting step disposed at the end of the locking ring; when the limiting mechanism is in the first engaged position, the top of the first limiting step abuts against the step surface of the second limiting step; when the limiting mechanism is in the second engaged position, the bottom of the first limiting step abuts against the step surface of the second limiting step.

[0007] Preferably, the first limiting step includes a first plane, a second plane, a third plane, and a fourth plane that intersect perpendicularly in sequence, and the second limiting step includes a fifth plane and a sixth plane that intersect perpendicularly; when the limiting mechanism is in the first engaging position, the first plane and the second plane abut against the fifth plane and the sixth plane, respectively; when the limiting mechanism is in the second engaging position, the third plane and the fourth plane abut against the fifth plane and the sixth plane, respectively.

[0008] Preferably, the first elastic element includes a vertically arranged first support rod and a first spring sleeved on the first support rod, with the top of the first support rod abutting against the bottom of the locking rod; when the lifting hook is opened, the first spring is in a compressed state.

[0009] Preferably, a first support plate arranged horizontally is fixed inside the connecting seat, the bottom of the first support rod can slide through the first support plate, and the bottom of the first spring abuts against the first support plate.

[0010] Preferably, the locking ring includes a locking ring body and a connecting body fixed to the end of the locking ring body, and the connecting body is rotatably connected to the connecting seat via a rotating shaft.

[0011] Preferably, the second elastic element includes a second support rod arranged laterally and a second spring sleeved on the second support rod, the end of the second support rod abutting against the connecting body; when the lifting hook is closed, the second spring is in a compressed state.

[0012] Preferably, a second support plate is fixed inside the connecting seat, the second support rod can slide through the second support plate, and the end of the second spring abuts against the second support plate.

[0013] Preferably, one end of the boom is rotatably connected to one side of the bottom of the connecting seat, and the locking ring body is rotatably fitted to the other side of the bottom of the connecting seat; when the lifting hook is closed, the other end of the boom is inserted into the locking ring body, and the connecting seat, the boom, and the locking ring body form a closed hook space.

[0014] The present invention also provides a method for unhooking the lifting hook, the method comprising: controlling the electric push rod to de-energize, the piston rod extending and pressing the locking rod; the locking rod rotating counterclockwise, simultaneously causing the limiting mechanism to rotate, thereby releasing the limiting of the locking ring; the locking ring rotating to an inclined position, causing the lifting rod to disengage from the locking ring, thereby achieving rapid and safe unhooking of the lifting rod; the limiting mechanism rotating to a second engagement position to limit the locking ring, thereby maintaining the lifting hook in a stable and effective unhooking open state.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The present invention provides a lifting hook and its unhooking method. The lifting hook includes a connecting seat, on which a rotatable locking rod, a locking ring, and a lifting rod are provided. The connecting seat contains a first elastic element that abuts against the locking rod and a second elastic element that abuts against the locking ring. A locking mechanism is provided between the locking rod and the locking ring for engagement. When the lifting hook is closed, the locking mechanism is in a first engagement position, and the lifting rod is inserted into the locking ring. When the lifting hook is opened, the locking mechanism is in a second engagement position, the locking ring rotates to an inclined position, and the lifting rod can rotate away from the locking ring. An electric push rod is installed in the connecting seat to press the locking rod, causing the locking mechanism to rotate from the first engagement position to the second engagement position. The lifting hook of the present invention has a simple structure and a reasonable design. The locking mechanism in the first engagement position can limit the locking ring, ensuring that the lifting hook maintains a stable and effective closed state, thereby achieving effective anti-unhooking lifting. The limit mechanism is rotated by energizing the electric push rod, which releases the lock ring and causes it to rotate to an inclined position, allowing the boom to disengage from the lock ring and achieve a quick and safe unhooking of the boom. The limit mechanism rotates to the second engagement position to limit the lock ring, ensuring that the lifting hook remains in a stable and effective unhooking state.

[0016] Other features and advantages of the present invention will become clearer after reading the detailed embodiments in conjunction with the accompanying drawings.

[0017] Make it clearer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the lifting hook (closed) of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of one embodiment of the lifting hook (closed) of the present invention;

[0020] Figure 3 This is a schematic diagram of one embodiment of the lifting hook (open) of the present invention;

[0021] Figure 4 This is a schematic cross-sectional view of one embodiment of the lifting hook (open) of the present invention;

[0022] Figure 5 This is a partial structural schematic diagram of one embodiment of the lifting hook of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of one embodiment of the locking rod of the lifting hook of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of one embodiment of the locking ring of the lifting hook of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of one embodiment of the first elastic support member of the lifting hook of the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of one embodiment of the second elastic support member of the lifting hook of the present invention;

[0027] Figure 10 This is a schematic diagram of the structure of one embodiment of the connecting seat of the lifting hook of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1-10 As shown, the lifting hook of the present invention includes a connecting seat, on which a rotatable locking rod 20, a locking ring, and a lifting rod 40 are provided; the connecting seat contains a first elastic element that abuts against the locking rod 20 and a second elastic element that abuts against the locking ring, and a locking mechanism is provided between the locking rod 20 and the locking ring for engaging; when the lifting hook is closed, the locking mechanism is in the first engaging position, and the lifting rod 40 is inserted into the locking ring; when the lifting hook is opened, the locking mechanism is in the second engaging position, the locking ring rotates to an inclined position, and the lifting rod 40 can rotate to disengage from the locking ring; an electric push rod 70 is installed in the connecting seat, and a retractable piston rod 71 is provided at the bottom of the electric push rod 70; the piston rod 71 is used to press against the locking rod 20 to make the locking mechanism rotate from the first engaging position to the second engaging position.

[0030] The lifting hook of this invention has a simple structure and a reasonable design. When the limiting mechanism is in the first engaged position, it can limit the locking ring, ensuring that the lifting rod 40 is stably and effectively inserted into the locking ring, thus maintaining the lifting hook in a stable and effective closed state and achieving effective anti-disengagement during lifting. Rotating the limiting mechanism via the electric push rod 70 releases the locking ring, causing it to rotate to an inclined position, allowing the lifting rod 40 to disengage from the locking ring, thus achieving rapid and safe rotation of the lifting rod 40 to the disengaged opening position. When the limiting mechanism rotates to the second engaged position, it can limit the locking ring, ensuring the lifting hook maintains a stable and effective disengaged opening state.

[0031] In this embodiment, the connecting seat includes two vertically spaced connecting plates. The two connecting plates can be connected and fixed together by a connecting post (not shown). The locking rod 20, locking ring, and hanging rod 40 are rotatably connected between the two connecting plates via a rotating shaft. Specifically, the connecting plate is a one-piece flat plate, and the connecting plate includes a first connecting plate 111. One side of the first connecting plate 111 (e.g., Figure 3As shown, a second connecting plate 112 extends out to the right side of the first connecting plate 111. The first connecting plate 111 and the second connecting plate 112 are two parts of one plate. The bottom of the first connecting plate 111 is higher than the bottom of the second connecting plate 112, and the connection between the bottom of the first connecting plate 111 and the bottom of the second connecting plate 112 is designed to be arc-shaped, which can make the closed hook space larger and facilitate the hanging of goods on the lifting rod 40.

[0032] The locking rod 20 is basically arranged horizontally. The locking rod 20 is rotatably connected between two second connecting plates 112 via a pivot. One end of the locking rod 20 extends upward towards the second connecting plate 112, and the other end of the locking rod 20 extends towards the first connecting plate 111.

[0033] The locking ring is a single piece, including a locking ring body 31 and a connecting body 32 fixed to the end of the locking ring body 31. The connecting body 32 is rotatably connected between two second connecting plates 112 via a rotating shaft, and the locking ring body 31 extends out of the bottom of the second connecting plate 112.

[0034] One end of the boom 40 (the left end of the boom 40 in this embodiment) is rotatably connected to the bottom of the two first connecting plates 111 via a pivot. When the lifting hook is closed, the other end of the boom 40 (the right end of the boom 40 in this embodiment) is inserted into the locking ring body 31. The first connecting plates 111, the boom 40, and the locking ring body 31 form a closed hook space. The boom 40 can be cylindrical, and the locking ring body 31 can be an elliptical ring, which allows the boom 40 to be stably and effectively fitted within the locking ring body 31, maintaining a stable and effective closed state for the hook. In addition, it facilitates the insertion and separation of the boom 40 within the locking ring body 31.

[0035] The electric actuator 70 can be any type of electric actuator commonly used in this technical field, and no specific limitation is made here. The electric actuator 70 is installed between the tops of the two first connecting plates 111, and the installation method can be bolt fixing or other fixing methods commonly used in this field, and no specific limitation is made here. A cover plate can be connected between the tops of the two first connecting plates 111. The cover plate is used to cover the electric actuator 70, concealing it and preventing problems such as easy contamination and scratching caused by exposure. The piston rod 71 can be directly a telescopic push rod on the electric actuator 70, or the piston rod 71 can be fixed to the end of the push rod, and no specific limitation is made here. Figure 2 and Figure 4 As shown, the piston rod 71 can extend and retract vertically. The bottom of the piston rod 71 corresponds to the left end of the locking rod 20. The extended piston rod 71 can press down on the left end of the locking rod 20, so that the locking rod 20 can rotate counterclockwise.

[0036] The limiting mechanism includes a first limiting step 21 disposed at the end of the locking rod 20 and a second limiting step 33 disposed at the end of the locking ring; when the limiting mechanism is in the first engaged position, the top of the first limiting step 21 abuts against the step surface of the second limiting step 33 (e.g., Figure 2 (As shown); it can limit the locking ring, preventing it from rotating, and ensure that the lifting rod 40 is securely and effectively inserted into the locking ring body 31, so that the lifting hook maintains a stable and effective closed state, thereby achieving effective anti-detachment lifting. When the limiting mechanism is in the second engagement position, the bottom of the first limiting step 21 abuts against the step surface of the second limiting step 33 (as shown). Figure 4 (As shown in the figure) can limit the locking ring, prevent the locking ring from rotating, and prevent the boom 40 from being inserted into the locking ring body 31, so that the lifting hook can maintain a stable and effective unhooking and opening state.

[0037] Specifically, the first limiting step 21 includes a first plane 211, a second plane 212, a third plane 213, and a fourth plane 214 that intersect perpendicularly in sequence. The second limiting step 33 includes a fifth plane 331, a sixth plane 332, a seventh plane 333, and an eighth plane 334 that intersect perpendicularly in sequence. When the limiting mechanism is in the first engaging position, the first plane 211 and the second plane 212 abut against the sixth plane 332 and the seventh plane 333, respectively. There is a gap between the third plane 213 and the eighth plane 334, which allows for a movable gap, facilitating the rotation of the locking rod 20 and the locking ring. When the limiting mechanism is in the second engaging position, the third plane 213 and the fourth plane 214 abut against the sixth plane 332 and the seventh plane 333, respectively. There is a gap between the second plane 212 and the fifth plane 331, which allows for a movable gap, facilitating the rotation of the locking rod 20 and the locking ring. The first elastic element includes a vertically arranged first support rod 51 and a first spring 52 sleeved on the first support rod 51. The top of the first support rod 51 is provided with an abutment cap 53, which abuts against the bottom of the locking rod 20. When the lifting hook is opened, the locking rod 20 rotates counterclockwise, which can drive the first support rod 51 to slide downward, so that the first spring 52 is in a compressed state.

[0038] A first support plate 12, arranged horizontally, is fixed inside the connecting seat. Specifically, the first support plate 12 is horizontally positioned between two first connecting plates 111, and a first through hole 13 is provided on the first support plate 12. The bottom of the first support rod 51 slidably passes through the first through hole 13 on the first support plate 12, which guides the vertical sliding of the first support rod 51, allowing it to slide smoothly and effectively vertically. The top of the first spring 52 abuts against the abutment cap 53, and the bottom of the first spring 52 abuts against the first support plate 12.

[0039] In this embodiment, the outer diameter of the contact cap 53 is larger than the diameter of the first through hole 13, which can prevent the first support rod 51 from falling out of the first through hole 13. The outer diameter of the first spring 52 is larger than the diameter of the first through hole 13, which can ensure that the bottom of the first spring 52 can abut against the first support plate 12.

[0040] The second elastic element includes a second support rod 61 arranged laterally and a second spring 62 sleeved on the second support rod 61. The end of the second support rod 61 abuts against the connecting body 32. When the lifting hook is closed, the locking ring rotates clockwise, and the connecting body 32 abuts against the second support rod 61, causing the second support rod 61 to slide to the left and the second spring 62 to be in a compressed state.

[0041] A vertically arranged second support plate 14 is fixed inside the connecting seat. The second support plate 14 has a second through hole (not shown in the figure). The second support rod 61 can slide through the second through hole in the second support plate 14, which can guide the lateral sliding of the second support rod 61, so that the second support rod 61 can slide smoothly and effectively laterally.

[0042] In this embodiment, the right end of the second support rod 61 abuts against the connecting body 32. An abutment ring 63 is provided on the second support rod 61 near its right end. The right end of the second spring 62 abuts against the abutment ring 63, and the left end of the second spring 62 abuts against the second support plate 14. The outer diameter of the abutment ring 63 is larger than the diameter of the second through hole, thereby preventing the second support rod 61 from sliding out of the second through hole.

[0043] The top of the connecting seat is equipped with a lifting ring 80, which allows the entire lifting hook to be lifted and moved.

[0044] The process of unhooking and opening the lifting hook: The electric push rod 70 is energized, and the spring of the electric push rod 70 pushes the piston rod 71, causing the piston rod 71 to move downwards and extend. The extended piston rod 71 can press down on the top of the locking rod 20, allowing the locking rod 20 to rotate counterclockwise around the pivot. Simultaneously, the limiting mechanism rotates, so that the limiting mechanism is no longer in the first engaged position, thus releasing the locking ring. The second elastic support member abuts against the locking ring, and the locking ring receives a rightward abutment force, causing the locking ring to rotate counterclockwise around the pivot. The locking ring body 31 rotates to an angle (the angle between the axial and lateral sides of the locking ring body 31 is acute), allowing the lifting rod 40 to disengage from the locking ring body 31, thereby allowing the lifting rod 40 to rotate and open, thus realizing the unhooking and opening of the lifting hook.

[0045] When the limiting mechanism rotates to the second engaging position, it limits the locking ring, preventing it from rotating counterclockwise and maintaining its tilted state. This prevents the other end of the boom 40 from being inserted into the locking ring body 31, thus ensuring the lifting hook remains in a stable and effective unhooked open state. Simultaneously, when the limiting mechanism rotates to the second engaging position, it limits the locking rod 20, preventing it from rotating counterclockwise and keeping the first spring 52 compressed.

[0046] The piston rod 71 can be controlled to remain in the extended state for 1-3 seconds. After 1-3 seconds, the piston rod 71 automatically retracts and no longer resists the locking rod 20. The specific control method can be a control method commonly used in this technical field, and no specific limitations are made here.

[0047] The closing process of the lifting hook: Push the locking ring body 31 to rotate clockwise to the vertical position (the axis of the locking ring body 31 is horizontal), insert the other end of the locking rod 20 into the locking ring body 31 to realize the closing of the lifting hook; at the same time, the first spring 52 abuts against the locking rod 20, and the locking rod 20 is subjected to an upward resisting force, which can give the locking rod 20 a clockwise rotation force, so that the locking rod 20 rotates to reset, and at the same time, the limiting mechanism rotates from the second engagement position to the first engagement position, which can limit the locking ring, so that the locking ring maintains a stable and effective vertical state, thereby enabling the lifting hook to maintain a stable and effective closed state, so as to achieve effective anti-unhooking operation.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A lifting hook, characterized in that, include A connecting seat, wherein the connecting seat is provided with a rotatable locking rod, a locking ring and a lifting rod; The connecting seat is provided with a first elastic element that abuts against the locking rod and a second elastic element that abuts against the locking ring, and a locking limiting mechanism is provided between the locking rod and the locking ring; When the lifting hook is closed, the limiting mechanism is in the first locking position, and the lifting rod is inserted into the locking ring; When the lifting hook is opened, the limiting mechanism is in the second locking position, the locking ring rotates to the tilt position, and the lifting rod can rotate to disengage from the locking ring; An electric push rod is installed inside the connecting seat. The electric push rod is used to press the locking rod so that the limiting mechanism rotates from the first engagement position to the second engagement position. The limiting mechanism includes a first limiting step disposed at the end of the locking bar and a second limiting step disposed at the end of the locking ring; When the limiting mechanism is in the first engaging position, the top of the first limiting step abuts against the step surface of the second limiting step; When the limiting mechanism is in the second engaging position, the bottom of the first limiting step abuts against the step surface of the second limiting step; The first limiting step includes a first plane, a second plane, a third plane and a fourth plane that intersect perpendicularly in sequence, and the second limiting step includes a fifth plane, a sixth plane, a seventh plane and an eighth plane that intersect perpendicularly in sequence. When the limiting mechanism is in the first engaging position, the first plane and the second plane respectively abut against the sixth plane and the seventh plane; When the limiting structure is in the second engaging position, the third plane and the fourth plane abut against the sixth plane and the seventh plane, respectively; The first elastic element includes a vertically arranged first support rod and a first spring sleeved on the first support rod, with the top of the first support rod abutting against the bottom of the locking rod; A first support plate arranged horizontally is fixed inside the connecting seat. The bottom of the first support rod can slide through the first support plate, and the bottom of the first spring abuts against the first support plate. The locking ring includes a locking ring body and a connecting body fixed to the end of the locking ring body. The connecting body is rotatably connected to the connecting seat via a rotating shaft. The second elastic element includes a second support rod arranged laterally and a second spring sleeved on the second support rod, the end of the second support rod abutting against the connecting body; A second support plate is fixed inside the connecting seat, the second support rod can slide through the second support plate, and the end of the second spring abuts against the second support plate; One end of the boom is rotatably connected to one side of the bottom of the connecting seat, and the locking ring body is rotatably fitted to the other side of the bottom of the connecting seat; When the lifting hook is closed, the other end of the boom is inserted into the locking ring body, and the connecting seat, the boom, and the locking ring body form a closed hook space; The method for unhooking the lifting hook includes: The electric push rod is de-energized. The bottom of the electric push rod is equipped with a retractable piston rod, which extends and presses against the locking rod. The locking rod rotates counterclockwise, which in turn causes the limiting mechanism to rotate, thereby releasing the limiting effect on the locking ring; The locking ring rotates to an inclined position, causing the boom to disengage from the locking ring, thereby enabling the boom to be quickly and safely unhooked and opened. The limiting mechanism rotates to the second engaging position to limit the locking ring, thereby maintaining the lifting hook in a stable and effective unhooked open state.

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