Overturning type quick and safe unhooking lifting hook for crane and lifting hook device assembly

Abstract

The utility model provides a turnover type quick and safe unhooking lifting hook of a crane and a lifting hook device assembly, and solves the problems that the crane inclines and the load of the lifting hook device assembly is difficult to unhook in time when the load of a cargo hoisted by the crane exceeds the limit, and the technical scheme is as follows: a hook part comprises a main hook and a turnover hook hinged through the front end of the main hook; the front end of the overturning hook is provided with an upward-warping hook tip, the tail of the overturning hook is provided with a limiting column extending towards the side wall of the main hook, and an arc-shaped shallow groove used for hooking a load cable is formed between the hook tip and the limiting column; the lower part of the overturning hook is rotationally connected with a main hook through a transverse main shaft; an electric control lock and a positioning bolt arranged through a guide sliding sleeve are arranged on the longitudinal side wall, corresponding to the limiting column, of the main hook, the lower end of the positioning bolt is connected with the limiting column in a pressing mode, and the electric control lock locks the upper end of the positioning bolt through a spring bolt; the bottom center of the arc-shaped shallow groove of the overturning hook at the locking position deviates to the outer side of the main shaft. Load goods can be quickly unhooked in an overloading state, a crane is prevented from turning over, and the safety of the crane is protected.

Description

Technical Field

[0001] This utility model relates to the field of crane equipment, and in particular to a crane tilting type quick and safe unhooking hook and hook device assembly, which is suitable for safe lifting operations of engineering cranes. Background Technology

[0002] Currently, cranes are commonly used lifting equipment in engineering projects, including truck cranes, construction site cranes, train cranes, and ship cranes. During crane operations, operator negligence, operational errors, misjudgments of the weight of the load, or issues with the quality of the lifting equipment can lead to excessive crane load, causing a shift in the center of gravity. This can result in the inability to immediately adjust the crane's center of gravity or detach it from the load, ultimately leading to a rollover or overturning accident, causing significant personal injury and property damage. Existing crane hooks consist of an upper vertical connecting rod and a lower integrated hook for attaching the load. The hook assembly includes a hook support frame with side guards and a pulley mechanism for connecting the slings. The upper end of the hook connecting rod passes through a mounting hole in the bottom plate of the hook support frame and is secured by bolts. The hook hangs naturally at the lower end of the hook support frame. When lifting heavy loads, the hook is attached to the bend of the hook via a cable sling suspending the load. Some hook systems incorporate an elastic anti-detachment bar at the hook opening to prevent the cable from detaching from the hook when not in a slack state. After lifting, the elastic anti-detachment bar is opened, allowing the cable sling to be removed. To monitor for potential rollovers or other abnormalities during crane operations, patent document CN111807241A provides a crane hydraulic outrigger anti-rollover alarm system. This system uses a pressure transmitter within the control system to monitor the status of the outriggers and issues an alarm signal when an abnormality occurs. Patent document CN107697820A also provides a crane anti-rollover system. This system uses gravity and pressure sensors on the outriggers, connected to an alarm system via the control system, to prevent rollovers and issue a warning signal. A typical crane hook assembly includes a sling pulley mechanism supported by a hook support frame and a hook suspension chassis equipped with the hook. The hook is engaged with the center through-hole of the hook suspension chassis via a hook positioning nut at the upper end of the hook shank, ensuring the hook is securely mounted and preventing it from detaching. Therefore, if the crane tilts while lifting cargo and the anti-tipping system alarms, the hook remains connected to the load, preventing the crane operator from quickly releasing the load and potentially leading to a rollover accident. Utility Model Content

[0003] The purpose of this utility model is to provide a crane tilting type fast and safe unhooking hook and hook device assembly, which solves the problem that when the crane tilts when the load exceeds the limit, the hook device assembly is difficult to unhook the load in time. It can quickly unhook the load under overload conditions, prevent the crane from overturning, and protect the crane safety.

[0004] The technical solution adopted by this utility model is as follows: a crane tilting type quick and safe unhooking hook, including a hook body with a connecting rod and a bent hook. The key technical points are: the bent hook includes a main hook and a tilting hook hinged to the front end of the main hook; the front end of the tilting hook is provided with an upward-curving hook tip, and the tail end of the tilting hook is provided with a limiting post extending towards the side wall of the main hook. An arc-shaped shallow groove for attaching the load cable is provided between the hook tip and the limiting post; the lower part of the tilting hook is rotatably connected to the main hook through a horizontally placed main shaft; an electric control lock and a positioning bolt provided through a guide sleeve are provided on the longitudinal side wall of the main hook corresponding to the limiting post. The lower end of the positioning bolt presses against the limiting post, and the electric control lock locks the upper end of the positioning bolt through a locking tongue; the center of the bottom of the arc-shaped shallow groove of the tilting hook in the locked position is biased to the outside of the main shaft.

[0005] The main hook is a single-piece arc-shaped hook connected to a flipping hook.

[0006] The main hook is an inverted T-shape with two symmetrical front ends, and flip hooks are respectively provided on the two symmetrical front ends.

[0007] The lower end of the positioning bolt is provided with a pressure plate with a clamp-shaped slot, and the tail limiting post of the flip hook is provided with an upper protrusion with an arc-shaped end face for embedding into the clamp-shaped slot.

[0008] The positioning bolt rod is fitted with a push rod spring that elastically pushes the positioning bolt upward.

[0009] The electric lock is an electric lock equipped with a wireless signal receiver to control its operation.

[0010] The opening of the hook is provided with an elastic anti-slip bar, and the front end of the elastic anti-slip bar overlaps with the hook tip.

[0011] A crane tilting type quick and safe hook release device assembly includes a hook support frame with side guards, a pulley mechanism for connecting slings, and a hook body. The hook body has a connecting rod and a hook portion. The key technical points are: the hook portion includes a main hook integrally connected to the connecting rod and a tilting hook hinged to the front end of the main hook; the front end of the tilting hook has an upward-curving hook tip, and the middle part has an arc-shaped shallow groove for attaching the load cable. The root of the tilting hook is rotatably connected to the main hook through a horizontally placed main shaft; the side wall of the main hook corresponding to the limiting post is provided with an electric lock and a positioning bolt set through a guide sleeve. The lower end of the positioning bolt presses against the limiting post at the tail of the tilting hook, and the electric lock locks the upper end of the positioning bolt through a locking tongue; the center of the bottom of the arc-shaped shallow groove of the tilting hook in the locked position is biased to the outside of the main shaft.

[0012] The main hook is a single-piece arc-shaped hook connected to a flipping hook.

[0013] The main hook is an inverted T-shape with two symmetrical front ends, and flip hooks are respectively provided on the two symmetrical front ends.

[0014] The advantages and positive effects of this utility model are as follows: Because the hook body of the crane tilting fast and safe unhooking hook and hook device assembly of this utility model adopts a combined structure of a bent hook main hook and a tilting hook, the tilting hook is provided with an arc-shaped shallow groove, an upward-curving hook tip at the front end, and a limiting post extending towards the side wall of the main hook at the rear end. The lower part is hinged to the front end of the tilting hook via a main shaft. Therefore, the tilting hook can use the arc-shaped shallow groove to support the cable of the hoisted load, the hook tip prevents the cable from detaching, and the tilting hook can rotate around the main shaft. The structure employs an electrically controlled lock on the side wall of the main hook and a positioning bolt installed through a guide sleeve, utilizing the positioning bolt... The lower end pressing limit post and the electric control lock, through the locking tongue locking the upper end of the positioning bolt, can keep the tilting hook in the state of supporting the hoisted load, prevent the tilting hook from tilting, effectively lock and position the tilting hook, and when the electric control lock is opened and released, the upper end of the positioning bolt disengages from the electric control lock's locking tongue limit and can move upward. Utilizing the tilting hook's position at the bottom center of the arc-shaped shallow groove, which is biased towards the outside of the main shaft, the weight of the load causes the tilting hook to quickly tilt outward of the hook body around the main shaft. At the same time, the tail limit post of the tilting hook disengages from the positioning bolt limit and tilts upward around the main shaft, thereby ensuring that the load cable disengages downward from the tilting hook. Therefore, it can effectively and reliably control the tipping hook through the electronic lock to release the load, avoiding the loss of personnel and crane overturning caused by the dragging of the suspended object. After the suspended object is separated from the crane, it can not only prevent the crane from being damaged, but also prevent the crane boom from being damaged by the suspended object and the surrounding environment due to the crane overturning. At the same time, it can prevent the crane operator from being injured or killed, thus protecting the crane's safety. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the crane tilting type quick and safe unhooking hook according to Embodiment 1 of this utility model;

[0017] Figure 2 yes Figure 1 Sectional view along axis AA;

[0018] Figure 3 yes Figure 1 BB-direction sectional view;

[0019] Figure 4 This is a schematic diagram of another flipping hook according to Embodiment 1 of this utility model;

[0020] Figure 5 This is a schematic diagram of the flipping hook in the flipping state structure of Embodiment 1;

[0021] Figure 6 This is a structural schematic diagram of the crane tilting type quick and safe unhooking hook device assembly according to Embodiment 1 of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the crane tilting type quick and safe unhooking hook according to Embodiment 2 of this utility model;

[0023] Figure 8 This is a structural schematic diagram of the crane tilting type quick and safe unhooking hook device assembly according to Embodiment 2 of this utility model;

[0024] Figure 9 yes Figure 8 A structural diagram showing the load-bearing item in a detached state from its cable.

[0025] The numbers in the diagram are explained as follows: 1. Connecting rod, 2. Main hook, 3. Electric lock, 31. Pin, 4. Guide sleeve, 5. Positioning bolt, 51. Push rod spring, 52. Pressure plate, 6. Main shaft, 7. Tilting hook, 71. Arc-shaped shallow groove, 72. Limiting post, 73. Hook tip, 74. Lower part of the tilting hook, 75. Bottom center vertical line of the arc-shaped shallow groove, 76. Upper protrusion, 8. Elastic anti-detachment rod, 9. Hook support frame, 10. Pulley mechanism, 11. Sling, 12. Fixing bolt, 13. Cable. Detailed Implementation

[0026] according to Figures 1 to 9 Detailed description of the specific structure of the utility model, Example 1, as follows Figure 1 As shown, a crane tilting type quick and safe unhooking hook includes a hook body with a connecting rod 1 and a hook portion. The connecting rod 1 serves as the hook shank. The hook portion includes an arc-shaped main hook 2 integrally connected to the connecting rod and a tilting hook 7 hinged to the front end of the main hook. The main hook is a single arc-shaped hook connected to the tilting hook. The front end of the main hook is near its lowest point. The two sides of the main hook 2 and the tilting hook 7 can be flat surfaces. Figures 2 to 5 As shown, the flip hook 7 has an upward-curving hook tip 73 at its front end and a limiting post 72 extending laterally towards the side wall of the main hook at its rear end. An arc-shaped shallow groove 71 is provided in the middle between the hook tip and the limiting post for attaching the cable carrying the load. The flip hook 7 has an upward-curving hook tip 73 at its front end, and the lower part 74 of the flip hook is rotatably connected to the main hook via a horizontally placed main shaft 6. Figure 3 As shown, the lower part 74 of the flip hook can be fork-shaped, with the front end of the main hook positioned in the middle of the lower part of the flip hook, and hinged to the main shaft 6 via a shaft hole, as shown. Figure 4As shown, a fork-shaped main hook front end and a lower part 74 of the flip hook positioned in the middle of the main hook front end can also be used, hinged to the main shaft 6 via a shaft hole. An electric lock 3 and a positioning bolt 5 are provided on the longitudinal sidewall of the main hook corresponding to the limiting post 72. Two sets of guide sleeves 4 can be fixedly arranged vertically on the longitudinal sidewall of the main hook. The positioning bolt 5 is longitudinally positioned and can move longitudinally along the guide sleeves. The lower end of the positioning bolt 5 presses against the end of the limiting post 72, thus limiting the tail of the flip hook. The electric lock 3 is located near the upper end of the positioning bolt and locks the upper end of the positioning bolt via a locking tongue 31, preventing the positioning bolt from moving upwards. The electric lock can be a commercially available pin-type electric lock with a wireless signal receiver controlling its operation. The pin-type electric lock has a pin locking tongue 31 and is connected to a battery power source. The flip hook is locked and released via the positioning bolt and the electric lock. The center of the bottom of the arc-shaped shallow groove of the flip hook in the locked position is offset towards the outside of the main shaft, as shown in the image. Figure 5 As shown, the vertical line 75 at the bottom center of the arc-shaped shallow groove 71 of the tilting hook 7 in the locked position is slightly offset from the outer side of the main shaft center. That is, the vertical line at the bottom center of the arc-shaped shallow groove forms a small angle C with the line connecting the bottom center of the arc-shaped shallow groove and the center of the main shaft. The angle C can be in the range of 1-3 degrees, which can ensure that the tilting hook tilts outward when it is released from the locked state. It is suitable for installation on cranes equipped with a crane tilt monitoring and alarm system or controlled by a remote control. The tilting hook is tilted by receiving the control signal from the crane tilt monitoring and alarm system or the remote control. This crane tilting type quick and safe unhooking hook is used as the hook of the crane hook assembly.

[0027] As a further improvement, such as Figure 5 As shown, the lower end of the positioning bolt 5 can be equipped with a pressure plate 52 with a clamp-shaped slot, and the tail limiting post 72 of the flip hook is provided with an upper protrusion 76 with an arc-shaped end face for embedding into the clamp-shaped slot. This allows the positioning bolt to lock and limit the limiting post more stably. The clamp-shaped slot of the pressure plate 52 and the upper protrusion 76 make arc-shaped surface contact, which can prevent jamming and locking between the clamp-shaped slot and the upper protrusion 76 when the flip hook flips outward.

[0028] As a further improvement, such as Figure 1 and Figure 3 As shown, a push rod spring 51, which elastically pushes the positioning bolt upward, can be fitted onto the rod section of the positioning bolt 5. The push rod spring is fitted onto the positioning bolt rod section between the upper and lower sets of guide sleeves 4. The upper end of the push rod spring 51 is fixed to the baffle of the positioning bolt rod, and the lower end of the push rod spring 51 abuts against the lower guide sleeve. Figure 6 As shown, when the electric lock 3, which is in the locked state, is opened, the bolt 31 retracts, and the push rod spring 51 can quickly push the positioning bolt upward, thereby causing the limit pin to disengage from the locking of the positioning bolt.

[0029] As a further improvement, such as Figure 1As shown, an elastic anti-detachment rod 8 can also be provided at the opening of the hook. The front end of the elastic anti-detachment rod 8 overlaps with the hook tip, and the root of the elastic anti-detachment rod is connected to the lower end of the connecting rod or the upper part of the hook. This can prevent the cable loop of the load cargo being suspended by the hook from coming off from the opening of the hook in the slack state when it is not being lifted.

[0030] Example 2, as Figure 7 As shown, a crane tilting type quick and safe unhooking hook includes a hook body with a connecting rod 1 and a hook portion. The connecting rod 1 serves as the hook handle. The hook portion includes an arc-shaped main hook 2 integrally connected to the connecting rod and a tilting hook 7 hinged to the front end of the main hook. The front end of the main hook is near the bottom of the main hook. The two sides of the main hook and the tilting hook can be flat surfaces. The main hook 2 adopts an inverted T-shape with two symmetrical front ends, and tilting hooks 7 are respectively provided on the two symmetrical front ends. The front ends of both tilting hooks 7 are provided with upward-curving hook tips 73, and the tails are provided with limiting posts 72 extending laterally towards the side wall of the main hook. An arc-shaped shallow groove 71 is provided in the middle between the hook tip and the limiting post. The lower parts of the two tilting hooks are rotatably connected to the two symmetrical front ends of the main hook through a horizontally placed main shaft 6. The connection between the lower part of the tilting hook and the front end of the main hook can adopt the structure of Embodiment 1. The limiting posts of the two flip hooks 7 adopt the same electrically controlled lock and positioning bolt as those provided on the longitudinal sidewalls of the corresponding main hooks. The structure of the electrically controlled lock and positioning bolt is the same as in Embodiment 1. A pressure plate can be provided at the lower end of the positioning bolt, or a pressure plate 52 with a clamp-shaped slot can be used. The limiting posts 72 at the tails of the two flip hooks are provided with upper protrusions 76 with arc-shaped end faces for embedding into the clamp-shaped slots. A push rod spring and / or an elastic anti-disengagement rod can also be provided.

[0031] Example 3: A crane tilting type quick and safe unhooking hook device assembly, such as... Figure 6 and Figure 8 As shown, the device includes a hook support frame 9 with side guards, a pulley mechanism 10 for connecting the sling 11, and a hook body. The hook body adopts the crane tilting type quick and safe release hook of Embodiment 1 or Embodiment 2. The connecting rod of the hook body is hooked to the hook hole on the bottom plate of the hook support frame by fixing bolts 12. The tilting hook 7 of the hook body can hook the cable 13 carrying the load. The crane tilting type quick and safe release hook can be applied to various cranes and hoists.

[0032] Working principle and process: such as Figure 5 and Figure 9As shown, when the crane's tilting-type quick-release hook and hook device assembly is in operation, the limiting pin of the tilting hook 7 is locked by the positioning bolt. When the electric lock is in the locked state, the tilting hook is in the locked position. This locked position causes the tilting hook to be in an unstable equilibrium state in the direction of gravity. "Unstable equilibrium" means that an object in a state of equilibrium cannot return to its original equilibrium state if it is slightly deviated due to some external force. When the electric lock 3 is opened, the positioning bolt 5 is pushed upward, and the tilting hook is released from the lock. Under the vibration or the gravity of the load cable 13, the tilting hook, using the fact that the center vertical line of the bottom of the arc-shaped shallow groove at the locked position is slightly deviated from the outside of the center of the main shaft, will quickly rotate outward and downward after slightly deviating from the locked position, thereby detaching the load cable from the hook body. After the tilting hook is tilted, it still remains connected to the main hook through the main shaft. This invention can therefore avoid the loss of personnel and crane accidents caused by the dragging of the suspended object. After the suspended object is separated from the crane, it can not only prevent the crane from being damaged by the suspended object and the surrounding environment due to the crane overturning, but also avoid the injury or death of the crane operator. It can be said to be a win-win situation and protect the safety of the crane.

[0033] In summary, the purpose of this utility model has been achieved.

Claims

1. A crane tilting type quick and safe unhooking hook, comprising a hook body with a connecting rod and a bent hook, characterized in that: The hook portion includes a main hook and a flip hook hinged to the front end of the main hook; the front end of the flip hook is provided with an upward-curving hook tip, and the tail end of the flip hook is provided with a limiting post extending towards the side wall of the main hook. An arc-shaped shallow groove for attaching a load cable is provided between the hook tip and the limiting post; the lower part of the flip hook is rotatably connected to the main hook via a horizontally placed main shaft; the longitudinal side wall of the main hook corresponding to the limiting post is provided with an electric lock and a positioning bolt provided through a guide sleeve. The lower end of the positioning bolt presses against the limiting post, and the electric lock locks the upper end of the positioning bolt through a locking tongue; the center of the bottom of the arc-shaped shallow groove of the flip hook in the locked position is biased towards the outside of the main shaft.

2. The crane tilting type quick and safe unhooking hook according to claim 1, characterized in that: The main hook is a single-piece arc-shaped hook connected to a flipping hook.

3. The crane tilting type quick and safe unhooking hook according to claim 1, characterized in that: The main hook is an inverted T-shape with two symmetrical front ends, and flip hooks are respectively provided on the two symmetrical front ends.

4. The crane tilting type quick and safe unhooking hook according to any one of claims 1 to 3, characterized in that: The lower end of the positioning bolt is provided with a pressure plate with a clamp-shaped slot, and the tail limiting post of the flip hook is provided with an upper protrusion with an arc-shaped end face for embedding into the clamp-shaped slot.

5. The crane tilting type quick and safe unhooking hook according to any one of claims 1 to 3, characterized in that: The positioning bolt rod is fitted with a push rod spring that elastically pushes the positioning bolt upward.

6. The crane tilting type quick and safe unhooking hook according to any one of claims 1 to 3, characterized in that: An electronically controlled lock is an electronically controlled lock that is equipped with a wireless signal receiver to control its operation.

7. The crane tilting type quick and safe unhooking hook according to any one of claims 1 to 3, characterized in that: The opening of the hook is provided with an elastic anti-slip bar, and the front end of the elastic anti-slip bar overlaps with the hook tip.

8. A crane tilting type quick and safe unhooking hook device assembly, comprising a hook support frame with side guard plates, a pulley mechanism for connecting slings, and a hook body, the hook body having a connecting rod and a hook portion, characterized in that: The hook portion includes a main hook integrally connected to the connecting rod and a flip hook hinged to the front end of the main hook; the front end of the flip hook is provided with an upward-curving hook tip, and the middle is provided with an arc-shaped shallow groove for attaching a load cable. The root of the flip hook is rotatably connected to the main hook through a horizontally placed main shaft; the side wall of the main hook corresponding to the limiting post is provided with an electric lock and a positioning bolt provided through a guide sleeve. The lower end of the positioning bolt presses against the limiting post at the tail of the flip hook, and the electric lock locks the upper end of the positioning bolt through a locking tongue; the center of the bottom of the arc-shaped shallow groove of the flip hook in the locked position is biased to the outside of the main shaft.

9. The crane tilting type quick and safe unhooking hook device assembly according to claim 8, characterized in that: The main hook is a single-piece arc-shaped hook connected to a flipping hook.

10. The crane tilting type quick and safe unhooking hook device assembly according to claim 8, characterized in that: The main hook is an inverted T-shape with two symmetrical front ends, and flip hooks are respectively provided on the two symmetrical front ends.

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