Safe unhooking crane hook device

Abstract

The invention provides a safe unhooking crane hook device which solves the problem that after an inclination monitoring alarm of a crane sends out an alarm signal, a hook device is difficult to unhook a load in time, and consequently the crane overturns, and the technical scheme is that the safe unhooking crane hook device comprises a sling pulley mechanism and a hook which are arranged through a hook supporting frame, the technical key points are as follows: the lifting hook is provided with a lifting hook unhooking device which is driven and locked by utilizing a driving motor and / or an electric control lock, a signal receiver for receiving a signal transmitted by a crane inclination alarm is arranged on the lifting hook supporting frame, and the signal receiver is connected with and controls the lifting hook unhooking device. The overload protection device can quickly and automatically unhook loaded goods in an overload state, prevent the crane from turning over and protect the safety of the crane.

Description

Technical Field

[0001] This invention relates to the field of crane equipment, and in particular to a safe unhooking crane hook device, 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. To monitor whether crane equipment will experience rollover or other abnormal conditions during operation, patent document CN111807241A discloses a crane hydraulic outrigger anti-rollover alarm system. This crane tilt monitoring and alarm system uses a pressure transmitter within the control system to monitor the status of the crane's hydraulic outriggers, and issues an alarm signal when an abnormality occurs. Patent document CN107697820A discloses a crane anti-tipping system. Its crane tilt monitoring and alarm system employs gravity and pressure sensors installed on the crane's outriggers, connected to an alarm via a control system for prevention. The alarm issues a warning signal. Conventional crane hook devices include a sling pulley mechanism supported by a hook support frame and a hook suspension chassis equipped with the hook. The hook is hooked to 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 detachment. Therefore, when the crane tilts while lifting cargo and the anti-tipping alarm system sounds, the hook remains connected to the cargo, preventing the crane operator from quickly releasing the load and potentially causing a tipping accident. Patent document CN106904531B ​​discloses an automatic unhooking hook. The hook is supported by a horizontally positioned hook shaft, and a gear section is installed outside the collar at the base of the hook shank. A gear meshing with the gear section is also installed on the gear shaft, serving to limit and guide rotation. The hook also includes a guide block with a compression spring, a safety buckle, and a positioning pin. Its function is that after the hook has delivered the load to the target position and completed the lifting, the hook loses the weight of the load and can be pushed by the compression spring to rotate and disengage from the sling. This reduces the need for operators to manually unhook the sling, thus reducing their workload. Patent document CN101973484B discloses an automatically disengaging hook. One end of the hook shank's extended balance point is equipped with a permanent magnet, and the other end with a counterweight. After the hook has delivered the load to the target position, it loses the load's weight, and the counterweight causes the hook to rotate and disengage from the sling. The permanent magnet then rotates to the locking position and remains in place. This design also reduces the workload of the operator. Therefore, the aforementioned two types of automatically disengaging hooks still cannot automatically disengage when the hook is overloaded, thus failing to prevent crane overturning. Summary of the Invention

[0003] The purpose of this invention is to provide a safe unhooking crane hook device that solves the problem that the hook device cannot unhook the load in time after the crane tilt monitoring alarm signal is issued, which leads to overturning and rollover. It can quickly and automatically unhook the load in the overload state to prevent the crane from overturning and protect the crane safety.

[0004] The technical solution adopted in this invention is: a safe unhooking crane hook device, including a sling pulley mechanism and a hook set through a hook support frame. The key technical point is: the hook is equipped with a hook unhooking device driven and locked by a drive motor and / or an electric lock. The hook support frame has a signal receiver for receiving signals emitted by a crane tilt alarm. The signal receiver is connected to control the hook unhooking device.

[0005] The hook is a wheel-type hook that rotates via a support shaft at the bottom of the support frame. The hook release device has an arc-shaped hook groove with a release opening along the circumference of the lower half of the hook, and an arc-shaped external gear ring in the upper half. The drive motor is mounted in the middle of the support frame and is connected to a gear transmission mechanism that engages with the arc-shaped external gear ring to drive the hook release device to rotate, causing the hook opening to rotate downwards. The hook shank includes connecting arms on both sides and a roller between the two connecting arms via a wheel axle. The roller is rolled in the arc-shaped hook groove to hook the hook. The electric lock is mounted on the hook support frame, and the electric lock pin is inserted into the lock hole of the hook release device. The signal receiver has a wireless signal receiving module.

[0006] The motor output shaft of the drive motor is laterally rotatable and mounted in the middle of the support frame. The gear transmission mechanism is a transmission gear set on the motor output shaft. The transmission gear meshes with the arc-shaped external gear ring. The motor base is fixedly connected to the support frame.

[0007] The output shaft of the drive motor is laterally mounted on the middle of the support frame. The gear transmission mechanism is a worm gear connected to the output shaft of the motor. The worm gear meshes with an arc-shaped external gear ring. The motor base is fixedly connected to the support frame.

[0008] The gear transmission mechanism includes a gear shaft and a right-angle reversing bevel gear set. The gear shaft is mounted in the middle of the support frame and meshes with the upper part of the arc-shaped external gear ring. The drive motor is vertically fixed on the inner wall of the support frame, and the motor output shaft of the drive motor drives the right-angle reversing sector gear set to transmit the transmission to the gear shaft.

[0009] The radius of the bottom edge of the arc-shaped hook groove of the hook gradually increases from the root of the hook groove to the unhooking opening.

[0010] The hook unhooking device includes a flipping hook hinged to the front end of the main hook; the front end of the flipping hook has an upward-curving hook tip, and the tail end of the flipping hook has 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 flipping 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 the electric control 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 control lock locks the upper end of the positioning bolt through a locking pin; the center of the bottom of the arc-shaped shallow groove of the flipping hook in the locked position is offset to the outside of the main shaft, and the signal receiver has a wireless signal receiving module.

[0011] The main hook is a single-piece arc-shaped hook connected to a flipping hook.

[0012] 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.

[0013] The positioning bolt rod is fitted with a push rod spring that elastically pushes the positioning bolt upward.

[0014] The advantages and positive effects of this invention are as follows: The safety hook release device of this invention employs a hook release mechanism driven and locked by a drive motor and / or an electronic lock. The hook support frame has a signal receiver for receiving signals emitted by a crane tilt alarm, and the signal receiver is connected to control the hook release mechanism. It can release the load by driving the hook release mechanism with a drive motor and / or an electronic lock, preventing overturning due to the dragging of the suspended object, thus avoiding losses to personnel and the crane itself. After the suspended object separates from the crane, it not only prevents crane accidents but also avoids damage to the crane boom, the suspended object, and the surrounding environment caused by crane overturning. Simultaneously, it prevents injury or death to the crane operator, protecting crane 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 hook device structure according to Embodiment 1 of the present invention; Figure 2 yes Figure 1 Sectional view along axis AA; Figure 3 This is a schematic diagram of the hook device structure according to Embodiment 2 of the present invention; Figure 4 This is a longitudinal sectional view of Embodiment 3 of the present invention; Figure 5 This is a longitudinal sectional view of Embodiment 4 of the present invention; Figure 6 This is a schematic diagram of the hook unhooking device of the present invention; Figure 7 This is a schematic diagram of the unhooking state structure of the present invention; Figure 8 This is a block diagram showing the connection between the drive motor and the electronic lock of the present invention; Figure 9 This is a schematic diagram of the structure of the flip-type hook unhooking device according to Embodiment 5 of the present invention; Figure 10 yes Figure 9 BB-direction sectional view; Figure 11 yes Figure 9 CC-direction sectional view; Figure 12 This is a schematic diagram of the flipping hook according to Embodiment 5 of the present invention; Figure 13 This is a schematic diagram of another flipping hook structure in Embodiment 5 of the present invention; Figure 14 This is a schematic diagram of the flipping hook in the flipping state structure of Example 5; Figure 15 This is a schematic diagram of the crane tilting type quick and safe unhooking hook of Embodiment Six of the present invention; Figure 16 This is a structural schematic diagram of the flipping hook in the flipped state according to Embodiment Six of the present invention.

[0017] Explanation of the numbers in the diagram: 1. Hook release device; 2. Support shaft; 3. Support frame; 4. Wireless signal receiver; 5. Gear transmission mechanism; 6. Sling pulley mechanism; 7. Drive motor; 8. Power supply; 9. Hook; 10. Electric lock; 10-1. Locking pin; 11. Bearing; 12. Arc-shaped external gear ring; 13. Arc-shaped hook root; 14. Arc-shaped hook head; 15. Release port; 16. Arc-shaped hook groove; 17. Locking hole; 50 Worm gear, 51 gear shaft, 52 transmission gear, 53 right-angle reversing bevel gear set, 54 reduction gear set, 71 motor output shaft, 72 motor base, 91 roller, 92 wheel axle, 93 hook handle, 94 bent hook, 95 cable, 101 connecting rod, 102 main hook, 104 guide sleeve, 105 positioning bolt, 151 push rod spring, 152 pressure plate, 106 main shaft, 107 flipping hook, 171 arc-shaped shallow groove, 172 limit post, 173 hook tip, 174 lower part of flipping hook, 175 bottom center vertical line of arc-shaped shallow groove, 176 upper protrusion, 108 elastic anti-detachment rod, 112 fixing bolt. Detailed Implementation

[0018] according to Figure 1-16 The specific structure of this invention is described in detail. A safe unhooking crane hook device, employing a rotary type, is suitable for installation on cranes equipped with a crane tilt monitoring and alarm system. Example 1, as follows... Figure 1 and Figure 2As shown, the system includes a hook support frame 3, a sling pulley mechanism 6, a hook release device 1, a hook 9, and a drive motor 7. The sling pulley mechanism 6 is mounted on the upper part of the support frame 3 via a rotating shaft. The hook release device 1 is a rotary wheel-shaped device, with its central part rotatably mounted on the lower part of the support frame via a transverse support shaft 2. Figure 6 and Figure 1 As shown, the hook release device adopts an arc-shaped hook groove 16 with a release opening along the circumference of the lower half of the hook, and an arc-shaped external toothed ring 12 is provided in the upper half. The root of one end of the arc-shaped hook is connected to the body of the hook release device, and the other end forms a release opening 15. The hook release device can rotate around the support shaft 2. The hook shank of the hook 9 adopts a longitudinal connecting arm shape on both sides. A roller 91 is provided between the two connecting arms using a wheel axle 92. The width between the two connecting arms is greater than the thickness of the hook release device. The roller 91 is rolled in the arc-shaped hook groove 16 so that the hook 9 is hooked on the hook release device 1. When the hook release device is in the rotating state, the roller 91 can roll in the arc-shaped hook groove 16, and the hook hangs down naturally. A drive motor 7 is mounted in the middle of the support frame 3. The drive motor 7 is connected to a gear transmission mechanism 5. In this embodiment, the output shaft 71 of the drive motor 7 is mounted horizontally in the middle of the support frame 3 via a bearing 11. The motor base 72 is fixed to the inner wall of the support frame 3. The gear transmission mechanism is a transmission gear 52 mounted on the output shaft of the drive motor. The transmission gear 52 meshes with an arc-shaped external gear ring 12, driving the unhooking port to rotate downwards from the side. A signal receiver is located on the hook support frame to receive signals from the crane tilt alarm. The signal receiver is connected to a control hook unhooking device. The drive motor 7 is also connected to a wireless signal receiver 4 and a power supply 8. The wireless signal receiver 4 and the power supply 8 can be fixed to the inner wall of the support frame 3. The wireless signal receiver 4 receives signals from the crane tilt monitoring alarm to rotate the drive motor 7, thereby causing the unhooking port 15 to rotate downwards. The drive motor can be a commercially available wireless control motor with a wireless signal receiving module. The wireless signal receiving module is used to receive alarm signals from the crane tilt monitoring alarm system to trigger the motor's operation. The wireless signal receiver can be controlled by wireless remote control, sound wave, or Bluetooth wireless signal connection, which is compatible with the crane tilt monitoring and alarm system.

[0019] As a further improvement, such as Figure 1 and Figure 8As shown, the support frame 3 can also be equipped with an electric lock 10. The electric lock is a commercially available wireless control electric lock with a wireless signal receiving module and a locking pin 10-1. A locking hole 17 is provided on the upper part of the hook release device 1. The locking pin 101 of the electric lock is inserted into the locking hole 17 of the hook release device. The electric lock is controlled by receiving signals from the crane tilt monitoring alarm using a wireless signal receiver 4. By setting the electric lock, the opening state of the hook release device can be controlled. When the locking pin of the electric lock is inserted into the locking hole of the hook release device, it locks the hook release device, preventing the hook release device from rotating and avoiding accidental hook detachment.

[0020] Example 2, as Figure 3 As shown, the motor base 72 of the drive motor is fixedly connected to the inner wall of the support frame 3. The motor output shaft 71 of the drive motor is laterally rotatably mounted in the middle of the support frame 3. The far end of the motor output shaft 71 can be rotatably mounted through the bearing 10. The gear transmission mechanism can adopt a worm gear 50 connected to the motor output shaft 71, and the worm gear 50 meshes with the arc-shaped external gear ring 12. By adopting the structure of the drive motor output shaft and the worm gear, the length direction of the motor output shaft can be perpendicular to the hook axis direction, which can reduce the thickness of the support frame in the hook axis direction, facilitate the installation of the drive motor, and use the worm gear to drive the hook, which can reduce speed and drive the transmission, resulting in a compact structure. Other structures are the same as in Embodiment 1. The wireless signal receiving module receives the signal from the crane tilt monitoring alarm, drives the motor to rotate, and drives the hook opening to rotate downward.

[0021] Example 3, as Figure 4 As shown, the motor base 72 of the drive motor is vertically fixed to the inner wall of one side of the support frame 3. The gear transmission mechanism can include a gear shaft 51 and a right-angle reversing bevel gear set 53. The two ends of the gear shaft 51 are mounted on the middle of the support frame through bearings. The right-angle reversing bevel gear set 53 is set at the end of the gear shaft 51 and the motor output shaft 71, meshing with each other. The transmission gear 52 of the gear shaft 51 meshes with the arc-shaped external gear ring 12. The structure of the gear shaft and the right-angle reversing bevel gear set allows for flexible and convenient installation of the drive motor. The speed reduction can be adjusted by adjusting the bevel gear set according to the load of the hook, saving space. Other structures are the same as in Embodiment 1. The wireless signal receiving module receives the signal from the crane tilt monitoring alarm, drives the motor to rotate, and drives the hook opening to rotate downward.

[0022] Example 4, as Figure 5As shown, the drive motor 7 is horizontally positioned on the inner wall of the support frame. The gear transmission mechanism includes a gear shaft 51 and a reduction gear set 54. The two ends of the gear shaft are mounted on the middle of the support frame via bearings. The reduction gear set 54 meshes with the motor output shaft 71 at the ends of the gear shaft 51. The transmission gear 52 of the gear shaft meshes with the arc-shaped external gear ring 12. The use of a gear shaft and reduction gear set allows for greater adjustment of the transmission ratio, accommodating larger loads on the hook, reducing the power of the drive motor, and saving space. Other components are the same as in Embodiment 1. The wireless signal receiving module receives signals from the crane tilt monitoring alarm, causing the drive motor to rotate and the hook opening to rotate downwards.

[0023] As a further improvement, such as Figure 6 As shown, the lower half of the hook is an arc-shaped hook, forming an arc-shaped hook groove 16 with the middle part. The upper half is equipped with an arc-shaped external toothed ring 12. The radius of the bottom of the inner edge of the arc-shaped hook groove gradually increases from the root of the hook groove to the unhooking opening. Similarly, the inner edge of the arc-shaped hook of the hook unhooking device 1 can gradually increase from the radius R of the arc-shaped hook root 13 to the radius r of the arc-shaped hook head 14. This allows the hook unhooking device to rotate from the side to the bottom, causing the hook roller 91 to gradually move downwards, making it easier for the drive motor to rotate the hook.

[0024] The working process and principle of a rotary safety release hook device for cranes: (e.g.) Figure 7 As shown, a longitudinal roller-type hook release device 1 is used. The lower half of the hook release device is an arc-shaped hook body, and the upper half is equipped with an arc-shaped external gear ring. Therefore, the drive motor 7 and gear transmission mechanism 5 can drive the release port of the hook release device to rotate from the side to the bottom, without increasing the upward tension on the sling or raising the sling position. As the release port rotates from the side to the bottom, the hook 9 falls out of the release port and is released. The drive motor is equipped with a wireless signal receiving module. After receiving the crane tilt monitoring alarm signal, the wireless signal receiving module can trigger the drive motor to rotate, so that the crane automatically drives the release port to rotate downward after receiving the tilt alarm. Therefore, it can avoid 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 save the crane from accidents, but also avoid the crane boom and the suspended object and the surrounding environment from being injured due to the crane overturning. At the same time, it can avoid the injury or death of the crane operator. It can be said to be a double benefit, protecting the safety of the crane.

[0025] Examples 5 and 6, as Figures 9 to 15 As shown, a flip-type safety unhooking crane hook device is used, as in Embodiment 5. Figure 1As shown, it includes a hook support frame 3 with side guards, a sling pulley mechanism 6, and a hook body with a connecting rod 101 and a hook portion. The connecting rod 101 serves as the hook shank. The hook portion includes an arc-shaped main hook 102 integrally connected to the connecting rod and a flip hook 107 hinged to the front end of the main hook. The main hook is a single arc-shaped hook connected to a flip hook. The front end of the main hook is near its lowest point. The two sides of the main hook 102 and the flip hook 107 can be flat surfaces. Figures 10 to 15 As shown, the flip hook 107 has an upward-curving hook tip 173 at its front end and a limiting post 172 extending laterally towards the side wall of the main hook at its rear end. An arc-shaped shallow groove 171 is provided in the middle between the hook tip and the limiting post for attaching the 95 cable carrying the load. The flip hook 107 has an upward-curving hook tip 173 at its front end, and the lower part 174 of the flip hook is rotatably connected to the main hook via a horizontally positioned main shaft 106. Figure 11 As shown, the lower part 174 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 106 via a shaft hole, as shown. Figure 13 As shown, a fork-shaped main hook front end and a tilting hook lower part 174 positioned in the middle of the main hook front end can also be used, hinged via a shaft hole through a main shaft 106. An electric lock 10 and a positioning bolt 105 are provided on the longitudinal sidewall of the main hook corresponding to the limiting post 172. Two sets of guide sleeves 104 can be fixedly arranged vertically on the longitudinal sidewall of the main hook. The positioning bolt 105 is longitudinally positioned and can move longitudinally along the guide sleeves. The lower end of the positioning bolt 105 presses against the end of the limiting post 172, limiting the tail of the tilting hook. The electric lock 10 is located near the upper end of the positioning bolt and locks the upper end of the positioning bolt with a locking pin 10-1, preventing the positioning bolt from moving upwards. A signal receiver for receiving signals transmitted by the crane tilt alarm is provided on the hook support frame. The signal receiver is connected to a control hook unhooking device. The electric lock can be a commercially available pin-type electric lock with a wireless signal receiver controlling the switch operation. The pin-type electric lock has a locking pin 10-1, and the electric lock 10 is connected to a battery power source. The tilting hook is locked and released by a positioning bolt and an electronic lock. In the locked position, the tilting hook is positioned with the center of the bottom of the arc-shaped shallow groove offset to the outside of the main shaft, as shown below. Figure 12 As shown, the vertical line 175 at the bottom center of the arc-shaped shallow groove 171 in the locked position of the flip hook 107 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 main shaft center. This angle C can be in the range of 1-3 degrees, ensuring that the flip hook flips outwards when 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 flip hook flips by receiving control signals from the crane tilt monitoring and alarm system or the remote control and controlling the electronic lock. This crane flip-type quick-release hook is used as the hook in the crane hook assembly.

[0026] As a further improvement, such as Figure 12As shown, the lower end of the positioning bolt 105 can be equipped with a pressure plate 152 with a clamp-shaped slot, and the tail limiting post 172 of the flip hook is provided with an upper protrusion 176 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 152 and the upper protrusion 176 make arc-shaped surface contact, which can prevent jamming and locking between the clamp-shaped slot and the upper protrusion 176 when the flip hook flips outward.

[0027] As a further improvement, such as Figure 9 and Figure 11 As shown, a push rod spring 151, which elastically pushes the positioning bolt 105 upward, can be fitted onto the rod section of the positioning bolt 105. The push rod spring is fitted between the upper and lower sets of guide sleeves 104 on the positioning bolt rod section. The upper end of the push rod spring 151 is fixed to the baffle of the positioning bolt rod, and the lower end of the push rod spring 151 abuts against the lower guide sleeve. Figure 14 As shown, when the electric lock 10, which is in the locked state, is opened, the locking pin 10-1 retracts, and the push rod spring 151 can quickly push the positioning pin upward, thereby causing the limit pin to disengage from the locking of the positioning pin.

[0028] As a further improvement, such as Figure 9 As shown, an elastic anti-detachment rod 108 can also be provided in the opening of the hook. The front end of the elastic anti-detachment rod 108 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.

[0029] Example 6, as Figure 14As shown, a flip-type safety hook release device for cranes includes a hook support frame 3 with side guards, a sling pulley mechanism 6, and a hook body with a connecting rod 101 and a bent hook. The connecting rod 101 serves as the hook handle. The two sides of the main hook and the flip hook can be flat surfaces. The main hook 102 is an inverted T-shape with symmetrical front ends on both sides, and flip hooks 107 are respectively provided on the symmetrical front ends on both sides. The front ends of both flip hooks 7 are provided with upward-curving hook tips 173, and the tails are provided with limiting posts 172 extending laterally towards the side wall of the main hook. An arc-shaped shallow groove 171 is provided in the middle between the hook tips and the limiting posts. The lower parts of the two flip hooks are rotatably connected to the symmetrical front ends of the main hook through a horizontally placed main shaft 106. The connection between the lower part of the flip hook and the front end of the main hook can adopt the structure of Embodiment 5. The limiting posts of the two flip hooks 107 adopt the same electrically controlled lock and positioning bolt as those provided on the longitudinal sidewall of the corresponding main hook. The structure of the electrically controlled lock and positioning bolt is the same as in Embodiment 5. A pressure plate can be provided at the lower end of the positioning bolt, or a pressure plate 152 with a clamp-shaped slot can be used. The limiting posts 172 at the tail of the two flip hooks are provided with an upper protrusion 176 with an arc-shaped end face for embedding into the clamp-shaped slot. A push rod spring and / or an elastic anti-disengagement rod can also be provided. The flip hook 7 of the hook body can be used to attach the cable 13 carrying the load. The crane flip-type quick and safe unhooking hook can be applied to various cranes and hoists.

[0030] The working principle and process of the tilting safety hook release device for cranes: Figure 15 and Figure 16 As 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 equilibrium cannot return to its original equilibrium state if it is slightly deviated due to some external force. When the electric lock 10 is opened, the positioning bolt 105 is pushed upward, and the tilting hook is released from the lock. Under the vibration or the gravity of the load cable 95, 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 save the crane from accidents, but also avoid damage to the crane boom and the suspended object and the surrounding environment caused by the crane overturning. At the same time, it can avoid injury or death to the crane operator. It can be said to be a win-win situation and protect the safety of the crane.

[0031] In summary, the objective of this invention has been achieved.

Claims

1. A safety disengaging hook device for a crane hook, comprising a sling pulley mechanism and a hook provided by a hook support frame, characterized in that: The hook is provided with a hook unhooking device driven by a driving motor and / or an electric control lock, the hook support frame is provided with a signal receiver for receiving the signal emitted by the crane tilt alarm, and the signal receiver is connected to control the hook unhooking device.

2. A safety disengaging hook device for a hoist hook as claimed in claim 1, characterised in that: The hook is a wheel type hook provided with rotation through a support frame lower support shaft, the hook unhooking device is an arc-shaped hook slot provided with an unhooking opening in the circumferential direction of the lower half of the hook, the upper half is provided with an arc-shaped outer gear ring, the driving motor is arranged in the middle of the support frame, the driving motor is connected with a gear transmission mechanism for engaging the arc-shaped outer gear ring to drive the rotation of the hook unhooking device to make the hook opening rotate downward; the hook handle includes two connecting arms on both sides and a roller arranged by a wheel shaft between the two connecting arms, the roller is arranged in the arc-shaped hook slot to hang the hook; the electric plug lock is arranged on the hook support frame, and the electric control lock pin is inserted into the lock hole of the hook unhooking device; the signal receiver is provided with a wireless signal receiving module.

3. A safety disengaging hook device for a hoist hook as claimed in claim 2, wherein: The motor output shaft of the driving motor is transversely arranged in the middle of the support frame, the gear transmission mechanism is a transmission gear arranged on the motor output shaft, the transmission gear is engaged with the arc-shaped outer gear ring, and the motor base is fixedly connected with the support frame.

4. The safety disengaging hook device of claim 2, wherein: The motor output shaft of the driving motor is transversely arranged in the middle of the support frame, the gear transmission mechanism is a worm connected with the motor output shaft, the worm is engaged with the arc-shaped outer gear ring, and the motor base is fixedly connected with the support frame.

5. The safety disengaging hook device of claim 2, wherein: The gear transmission mechanism includes a gear shaft and a right-angle reversing bevel gear set, the gear shaft is arranged in the middle of the support frame and engaged with the upper part of the arc-shaped outer gear ring; the driving motor is vertically fixed on the inner wall of the support frame, and the motor output shaft of the driving motor drives the right-angle reversing bevel gear set to drive the gear shaft.

6. A safety disengaging hook device according to any one of claims 2 to 5, characterised in that: The inner edge bottom of the arc-shaped hook slot of the hook gradually increases in radius from the hook slot root to the unhooking opening.

7. The safety decoupling hoist hook device according to claim 1, characterized in that: The hook unhooking device includes a turnover hook hingedly arranged at the front end of the main hook of the hook; the front end of the turnover hook is provided with an upwardly curved hook tip, the tail of the turnover hook is provided with a limiting column extending to the side wall of the main hook, and an arc-shaped shallow groove for hanging the cable of the load is arranged between the hook tip and the limiting column; the lower part of the turnover hook is rotatably connected to the main hook through a transversely arranged main shaft; the electric control lock and a positioning bolt arranged through a guide sleeve are arranged on the longitudinal side wall of the main hook corresponding to the limiting column, the lower end of the positioning bolt is pressed to the limiting column, and the electric control lock locks the upper end of the positioning bolt through a lock pin; the center of the arc-shaped shallow groove of the turnover hook at the locking position is deviated to the outside of the main shaft, and the signal receiver is provided with a wireless signal receiving module.

8. A safety disengaging hook device for a hoist hook as claimed in claim 6, wherein: The main hook is a single arc-shaped hook provided with one turnover hook.

9. The safety disengaging hook device of claim 6, wherein: The main hook is a reverse T-shaped hook provided with two symmetric front ends, and the two symmetric front ends are respectively provided with a turnover hook.

10. A safety disengaging hook device according to any one of claims 7 to 9, characterised in that: The rod part of the positioning bolt is sleeved with a push rod spring for pushing the positioning bolt upwardly.

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