Safe unhooking crane hook device

Abstract

The utility model 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, so that the crane overturns, and adopts the technical scheme 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] The utility model relates to the field of crane equipment, in particular to a safe unhooking crane hook device, which is suitable for safe hoisting operations of engineering cranes. Background Art

[0002] At present, cranes are commonly used crane equipment in engineering equipment, including automobile cranes, construction site cranes, train cranes and ship cranes. When the crane operator is lifting load objects for lifting construction operations, due to negligence, misjudgment of the weight of the objects being lifted and the quality of the lifting equipment, the crane load is too large and the center of gravity is shifted. The center of gravity of the crane cannot be adjusted immediately or it is separated from the objects being lifted, and eventually a rollover or overturning safety accident occurs, causing huge losses of personnel and property. In order to monitor whether the crane equipment will roll over or other abnormal conditions during construction operations, the patent document with announcement number CN111807241A provides a crane hydraulic outrigger anti-rollover alarm system, and its crane tilt monitoring alarm system monitors the state of the crane hydraulic outrigger by setting a pressure transmitter in the control system, and sends an alarm signal through the alarm when an abnormality occurs. The patent document with announcement number CN107697820A provides a crane anti-rollover system, in which the crane tilt monitoring alarm system adopts gravity sensors and pressure sensors to be set on the crane legs, and the alarm is connected to the control system for prevention, and the alarm sends out a warning signal. The conventional crane hook device includes a sling pulley mechanism set by a hook support frame and a hook suspension chassis equipped with a hook. The hook is hung on the central through hole of the hook suspension chassis through the hook positioning nut at the upper end of the hook handle, so that the hook can be firmly set on the hook suspension chassis to ensure that the hook cannot be unhooked. Therefore, when the crane tilts while lifting the cargo and the crane anti-rollover system alarm system sends out an alarm signal, the hook is still connected to the hoisted cargo, and the crane equipment operator cannot quickly throw away the load, resulting in a rollover accident. The patent document with announcement number CN106904531B ​​provides an automatic unhooking hook, which supports the hook through a horizontally placed hook shaft, and a gear part is arranged outside the ring at the root of the hook handle. A gear meshing with the gear part is also arranged through the gear shaft to play a role of limiting and guiding rotation. It also has a guide block with a compression spring, a safety buckle and a positioning pin structure. Its function is that after the hook delivers the load to the target position and completes the lifting, the hook loses the gravity of the load and can be pushed by the compression spring to rotate the hook to detach from the sling, thereby reducing the steps for the operator to manually remove the sling and reducing the operator's workload. The patent document with the announcement number CN101973484B provides a hook that can be automatically unhooked. A permanent magnet is set at one end of the balance point of the extended end of the hook handle, and a counterweight is set at the other end. When the hook delivers the load to the target position and completes the delivery, the hook loses the gravity of the load, and the counterweight is drooped to drive the hook to rotate and detach from the sling, and the permanent magnet rotates to the locking position to be fixed, which also plays a role in reducing the workload of the operator. Therefore, the above two types of automatically unhooking hooks still cannot automatically unhook when the hook load is overloaded to prevent the crane from overturning. Utility Model Content

[0003] The purpose of the utility model is to provide a safe unhooking crane hook device, which solves the problem that after the tilt monitoring alarm of the crane sends out an alarm signal, the hook device is difficult to unhook the load in time, resulting in overturning. It can quickly and automatically unhook the load in an overload state, prevent the crane from overturning, and protect the safety of the crane.

[0004] The technical solution adopted by the utility model is: a safe unhooking crane hook device, including a sling pulley mechanism and a hook arranged through a hook support frame, and the technical key points are: the hook is provided with a hook unhooking device driven and locked by a drive motor and / or an electric control lock, and the hook support frame is provided with a signal receiver for receiving a signal transmitted by a crane tilt alarm, and the signal receiver is connected to control the hook unhooking device.

[0005] The hook is a wheeled hook that is rotatably arranged through the supporting shaft at the lower part of the supporting frame; the hook unhooking device is an arc-shaped hook groove with an unhooking opening arranged in the circumferential direction on the lower half of the hook, and an arc-shaped outer gear ring is arranged on the upper half; the driving motor is mounted in the middle part of the supporting frame, and the driving motor is connected to a gear transmission mechanism for engaging the arc-shaped outer gear ring to drive the hook unhooking device to rotate so that the unhooking opening of the hook rotates downward; the hook handle of the hook includes connecting arms on both sides and rollers arranged between the two connecting arms using wheel axles, and the rollers are rollingly arranged in the arc-shaped hook groove to hang the hook; the electric control lock is arranged on the hook supporting frame, and the electric control lock pin is inserted into the lock hole of the hook unhooking device; the signal receiver has a wireless signal receiving module.

[0006] The motor output shaft of the driving motor is laterally rotatably mounted in the middle of the supporting frame, the gear transmission mechanism is a transmission gear arranged on the motor output shaft, the transmission gear is meshed with the arc-shaped outer gear ring, and the motor base is fixedly connected to the supporting frame.

[0007] The motor output shaft of the driving motor is laterally rotatably mounted in the middle of the supporting frame, the gear transmission mechanism is a worm connected to the motor output shaft, the worm is meshed with the arc-shaped outer gear ring, and the motor base is fixedly connected to the supporting 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 outer gear ring. The drive motor is vertically fixed to the inner wall of the support frame, and the motor output shaft of the drive motor drives the right-angle reversing fan gear set to transmit and connect the gear shaft.

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

[0010] The hook unhooking device includes a flip hook hinged at the front end of the main hook of the hook; an upwardly tilted hook tip is arranged at the front end of the flip hook, a limiting column extending toward the side wall of the main hook is arranged at the tail of the flip hook, and an arc-shaped shallow groove for hanging the load cable is arranged between the hook tip and the limiting column; the lower part of the flip hook is rotatably connected to the main hook through a horizontal main shaft; the electric control lock and the 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 against the limiting column, 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 flip hook in the locked position is biased toward the outside of the main shaft, and the signal receiver has a wireless signal receiving module.

[0011] The main hook is a single-body arc-shaped hook connected to a flip hook.

[0012] The main hook is in an inverted T-shape with two symmetrical front ends, and the two symmetrical front ends are respectively provided with flip hooks.

[0013] The positioning bolt rod portion is sleeved with a push rod spring which elastically pushes the positioning bolt to slide upward.

[0014] The advantages and positive effects of the utility model are as follows: since the utility model is a safety unhooking crane hook device, the hook is provided with a hook unhooking device that is locked by a driving motor and / or an electric lock, and a signal receiver for receiving the signal transmitted by the crane tilt alarm is provided on the hook support frame, and the signal receiver is connected to control the hook unhooking device. It can release the load by using the hook unhooking device that is locked by a driving motor and / or an electric lock to drive, thereby avoiding the loss of personnel and the crane overturning caused by the overturning 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 damage to the crane arm caused by the suspended object and the surrounding environment due to the overturning of the crane, and at the same time avoid the casualties of the crane driver, and protect the safety of the crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the hook device of the first embodiment of the utility model;

[0017] Figure 2 yes Figure 1 AA section view;

[0018] Figure 3 This is a schematic diagram of the structure of the hook device of the second embodiment of the utility model;

[0019] Figure 4 It is a longitudinal sectional view of the third embodiment of the utility model;

[0020] Figure 5It is a longitudinal sectional view of the fourth embodiment of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the hook unhooking device of the utility model;

[0022] Figure 7 It is a schematic diagram of the structure of the utility model in the unhooking state;

[0023] Figure 8 This is a connection diagram of the drive motor and the electric control lock of the utility model;

[0024] Fig. 9 It is a structural schematic diagram of a flip-type hook unhooking device according to a fifth embodiment of the utility model;

[0025] Fig.10 yes Fig. 9 BB section view;

[0026] Fig.11 yes Fig. 9 CC section view;

[0027] Fig.12 It is a structural schematic diagram of a flip hook of Embodiment 5 of the present utility model;

[0028] Fig.13 This is a schematic structural diagram of another flip hook in Embodiment 5 of the present utility model;

[0029] Fig.14 is a schematic diagram of the structure of the flip hook in flipping state of the fifth embodiment;

[0030] Fig.15 It is a structural schematic diagram of a crane flip-type quick and safe unhooking hook according to a sixth embodiment of the utility model;

[0031] Fig.16 It is a structural schematic diagram of the flip hook in the flipping state of the sixth embodiment of the utility model.

[0032] Description of the numbers in the figure: 1 hook unhooking 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 control lock, 10-1 lock pin, 11 bearing, 12 arc-shaped outer gear ring, 13 arc-shaped hook root, 14 arc-shaped hook head, 15 unhooking port, 16 arc-shaped hook slot, 17 lock hole, 50 Worm, 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 axle, 93 hook handle, 94 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 flip hook, 171 arc shallow groove, 172 limit column, 173 hook tip, 174 flip hook bottom, 175 arc shallow groove bottom center vertical line, 176 upper protrusion, 108 elastic anti-slip rod, 112 fixing bolt. DETAILED DESCRIPTION

[0033] according to Figure 1-16 The specific structure of the utility model is described in detail. A safe unhooking crane hook device adopts a rotary type safe unhooking crane hook device, which is suitable for installation on a crane equipped with a crane tilt monitoring alarm system. Figure 1 and Figure 2 As shown, it includes a hook support frame 3, a sling pulley mechanism 6, a hook unhooking device 1, a hook 9 and a driving motor 7. Among them, the sling pulley mechanism 6 is arranged on the upper part of the support frame 3 through a rotating shaft, and the hook unhooking device 1 adopts a rotating wheel shape, and the central part is rotatably arranged at the lower part of the support frame through a transverse support shaft 2; Figure 6 and Figure 1As shown, the hook unhooking device adopts an arc-shaped hook groove 16 with a unhooking opening arranged in the circumferential direction of the lower half of the hook, and an arc-shaped outer gear ring 12 is arranged on the upper half. The root of one end of the arc-shaped hook is connected to the hook unhooking device body, and the other end forms a unhooking opening 15. The hook unhooking device can rotate around the support shaft 2; the hook handle of the hook 9 adopts a connecting arm shape longitudinally on both sides, and a roller 91 is arranged between the two connecting arms using a wheel axle 92. The width between the connecting arms on both sides is greater than the thickness of the hook unhooking device. The roller 91 is rotatably arranged in the arc-shaped hook groove 16, so that the hook 9 is hung on the hook unhooking device 1. When the hook unhooking device is in a rotating state, the roller 91 can roll in the arc-shaped hook groove 16, and the hook naturally droops. A driving motor 7 is mounted in the middle of the support frame 3, and the driving motor 7 is connected to a gear transmission mechanism 5. In this embodiment, the motor output shaft 71 of the driving motor 7 is horizontally rotated and mounted in the middle of the support frame 3 through a bearing 11, and the motor base 72 is fixed to the inner wall of the support frame 3. The gear transmission mechanism is a transmission gear 52 arranged on the output shaft of the driving motor, and the transmission gear 52 is meshed with the arc-shaped outer gear ring 12, and the driving unhooking port rotates downward from the side. A signal receiver for receiving the signal transmitted by the crane tilt alarm is provided on the hook support frame, and the signal receiver is connected to control the hook unhooking device. The driving motor 7 is also connected to a wireless signal receiver 4 and a power supply 8, and the wireless signal receiver 4 and the power supply 8 can be fixed on the inner wall of the support frame 3. The wireless signal receiver 4 is used to receive the signal of the crane tilt monitoring alarm to rotate the driving motor 7, thereby driving the unhooking port 15 to rotate downward. The driving motor can use a commercially available wireless control motor with a wireless signal receiving module, and the wireless signal receiving module is used to receive the alarm signal of the crane tilt monitoring alarm system to trigger the motor to operate. The wireless signal receiver can adopt a wireless remote control, sound wave or Bluetooth wireless signal connection control method that matches the crane tilt monitoring alarm system.

[0034] As a further improvement, Figure 1 and Figure 8 As shown, the support frame 3 can also be provided with an electric lock 10, which is a commercially available wireless control electric lock with a wireless signal receiving module, and has a lock pin 10-1. A lock hole 17 is provided on the upper part of the hook unhooking device 1, and the lock pin 101 of the electric lock is inserted into the lock hole 17 of the hook unhooking device, and the wireless signal receiver 4 is used to receive the crane tilt monitoring alarm signal to control the electric lock. By providing the electric lock, the opening state of the hook unhooking device can be controlled. When the lock pin of the electric lock is inserted into the lock hole of the hook unhooking device, the hook unhooking device is locked to prevent the hook unhooking device from rotating and avoid the hook from falling off accidentally.

[0035] Embodiment 2, as Figure 3As shown, the motor base 72 of the driving motor is fixedly connected to the inner wall of the support frame 3, and the motor output shaft 71 of the driving motor is horizontally rotatably mounted in the middle of the support frame 3. The distal end of the motor output shaft 71 can be rotatably mounted through the bearing 10, and the gear transmission mechanism can adopt a worm 50 connected to the motor output shaft 71, and the worm 50 is meshed with the arc-shaped outer gear ring 12. The structure of the driving motor output shaft and the worm can make the length direction of the motor output shaft perpendicular to the hook axis direction, which can reduce the thickness of the support frame in the hook axis direction, facilitate the setting of the driving motor, and use the worm to drive the hook, which can reduce the transmission and has a compact structure. Other structures are the same as those in Example 1. The wireless signal receiving module receives the crane tilt monitoring alarm signal, drives the motor to rotate, and drives the hook mouth to rotate downward.

[0036] Embodiment three, as Figure 4 As shown, the motor base 72 of the driving motor is vertically fixedly connected to the inner wall of one side of the support frame 3, and the gear transmission mechanism can be adopted to include a gear shaft 51 and a right-angle reversing bevel gear set 53. The two ends of the gear shaft 51 are mounted in the middle of the support frame through bearings, and the right-angle reversing bevel gear set 53 that meshes with each other is set at the ends of the gear shaft 51 and the motor output shaft 71, and the transmission gear 52 of the gear shaft 51 is meshed with the arc-shaped outer gear ring 12. The gear shaft and the right-angle reversing bevel gear set structure are adopted to facilitate and flexibly set the driving motor. The deceleration can be adjusted by adjusting the bevel gear set according to the load of the hook, saving space. The other structures are the same as those in Example 1. The wireless signal receiving module receives the signal of the crane tilt monitoring alarm, drives the motor to rotate, and drives the hook mouth to rotate downward.

[0037] Embodiment 4, as Figure 5 As shown, the driving motor 7 is horizontally arranged on the inner wall of the supporting frame, and the gear transmission mechanism includes a gear shaft 51 and a reduction gear set 54. The two ends of the gear shaft are mounted in the middle of the supporting frame through bearings. The reduction gear set 54 that meshes with each other is arranged at the ends of the gear shaft 51 and the motor output shaft 71, and the transmission gear 52 of the gear shaft meshes with the arc-shaped outer gear ring 12. The structure of the gear shaft and the reduction gear set can adjust the transmission ratio to a greater extent, adapt to a larger load of the hook, reduce the power of the driving motor, and save space. The other structures are the same as those in Example 1. The wireless signal receiving module receives the signal of the crane tilt monitoring alarm, drives the motor to rotate, and drives the hook mouth to rotate downward.

[0038] As a further improvement, Figure 6As shown, the lower half of the hook is an arc-shaped hook, which forms an arc-shaped hook groove 16 with the middle part, and the upper half is provided with an arc-shaped outer gear ring 12. The bottom of the inner edge of the arc-shaped hook groove of the hook gradually increases in radius from the hook groove root to the hook-off mouth, and the inner edge of the arc-shaped hook of the hook-off device 1 can be set to gradually increase from the radius R of the arc-shaped hook root 13 to the radius r of the arc-shaped hook head 14. The hook-off mouth of the hook-off device can be rotated from the side to the bottom, so that the hook roller 91 gradually shifts downward, which is easy to drive the motor to drive the hook to rotate.

[0039] The working process and principle of the rotary safety unhooking crane hook device: Figure 7 As shown, a longitudinal roller type hook unhooking device 1 is adopted, the lower half of the hook unhooking device is an arc-shaped hook body, and the upper half is provided with an arc-shaped outer gear ring, so the driving motor 7 and the gear transmission mechanism 5 can be used to drive the unhooking port of the hook unhooking device to rotate from the side to the bottom, while not increasing the upward pulling force applied to the sling and not raising the position of the sling; the unhooking port rotates from the side to the bottom, and the hook 9 falls off the unhooking port and unhooks; the driving motor is provided with a wireless signal receiving module, and the wireless signal receiving module can trigger the driving motor to rotate after receiving the signal of the crane tilt monitoring alarm, so that the crane automatically drives the unhooking 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, not only can the crane accident be saved, but also the damage to the crane arm and the surrounding environment caused by the overturning of the crane can be avoided, and at the same time, the casualties of the crane driver can be avoided, which can be said to kill two birds with one stone and protect the safety of the crane.

[0040] Embodiment 5 and embodiment 6, as Figures 9 to 15 As shown, a flip-over type safety unhooking crane hook device is used, and the fifth embodiment is as shown in Figure 1 As shown, it includes a hook support frame 3 with two side guard plates, a sling pulley mechanism 6 and a hook body with a connecting rod 101 and a hook portion. The connecting rod 101 serves as a hook handle. The hook portion includes an arc-shaped main hook 102 integrally connected to the connecting rod and a flip hook 107 hinged through 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 close to the lowermost end of the main hook. The two side surfaces of the main hook 102 and the flip hook 107 can be flat surfaces. Figures 10 to 15 As shown, the front end of the flip hook 107 is provided with an upwardly tilted hook tip 173, the tail is provided with a limit column 172 extending laterally toward the side wall of the main hook, and the middle part between the hook tip and the limit column is provided with an arc-shaped shallow groove 171 for hanging the 95 cable of the load. The front end of the flip hook 107 is provided with an upwardly tilted hook tip 173, and the bottom part 174 of the flip hook is rotatably connected to the main hook through the horizontal main shaft 106, as shown in FIG. Fig.11As shown, the flip hook lower part 174 can be a fork-shaped structure, and the front end of the main hook is arranged in the middle of the flip hook lower part, and is hinged through the main shaft 106 through the shaft hole, such as Fig.13 As shown, the front end of the main hook can also be a fork-shaped structure, and the lower part 174 of the flip hook is arranged in the middle of the front end of the main hook, and is hinged through the main shaft 106 using the shaft hole. The longitudinal side wall of the main hook corresponding to the limit column 172 is provided with an electric control lock 10 and a positioning bolt 105. Two groups of guide sleeves 104 fixedly arranged up and down can be arranged on the longitudinal side wall of the main hook. The positioning bolt 105 is arranged longitudinally and can move longitudinally along the guide sleeve. The lower end of the positioning bolt 105 is pressed against the end of the limit column 172, which can limit the tail of the flip hook. The electric control lock 10 is close to the upper end of the positioning bolt, and the upper end of the positioning bolt is locked by the locking pin 10-1, which can prevent the positioning bolt from moving upward. There is a signal receiver for receiving the signal transmitted by the crane tilt alarm on the hook support frame, and the signal receiver is connected to the hook unhooking device. The electric control lock can adopt a commercially available pin-type electric control lock with a wireless signal receiver to control the switch action of the electric control lock. The pin-type electric control lock has a pin-type locking pin 10-1, and the electric control lock 10 is connected to a battery power supply. The flip hook is locked and released by the positioning bolt and the electric lock. The bottom center of the arc-shaped shallow groove of the flip hook in the locked position is biased toward the outside of the main shaft, such as Fig.12 As shown, the bottom center vertical line 175 of the arc-shaped shallow groove 171 of the flip hook 107 in the locked position is slightly biased to the outside of the main shaft center, that is, the bottom center vertical line 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. The angle C can be in the range of 1-3 degrees, which can ensure that the flip hook flips outward when it is out of the locked state. It is suitable for installation on a crane equipped with a crane tilt monitoring alarm system or controlled by a remote control, and controls the electric control lock to flip the flip hook by receiving the control signal of the crane tilt monitoring alarm system or the remote control. The crane flipping type quick and safe unhooking hook is used as a hook of the crane hook device assembly.

[0041] As a further improvement, Fig.12 As shown, the lower end of the positioning bolt 105 can be provided with a pressure plate 152 with a clamp-shaped notch, and the limit column 172 at the tail of the flip hook is provided with an upper protrusion 176 with an arc-shaped end surface for embedding into the clamp-shaped notch. The positioning bolt can be locked and limited to the limit column more stably, and the clamp-shaped notch of the pressure plate 152 and the upper protrusion 176 are in contact with an arc surface, which can prevent the clamp-shaped mouth and the upper protrusion 176 from being stuck and locked when the flip hook flips outward.

[0042] As a further improvement, Fig. 9 and Fig.11 As shown, a push rod spring 151 can be mounted on the rod of the positioning bolt 105 to elastically push the positioning bolt to slide upward. The push rod spring is mounted on the positioning bolt rod section between the upper and lower sets of guide sleeves 104. 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. Fig.14 As shown, when the electric lock 10 in the locked state is opened, the lock pin 10-1 retracts, and the push rod spring 151 can quickly push the positioning bolt to bounce upward, thereby allowing the limiting column to break away from the locking of the positioning bolt.

[0043] As a further improvement, Fig. 9 As shown, an elastic anti-slip rod 108 can also be provided at the opening of the hook portion, the front end of the elastic anti-slip rod 108 overlaps the hook tip, and the root of the elastic anti-slip rod is connected to the lower end of the connecting rod or the upper part of the hook portion, which can prevent the cable loop hanging on the load cargo inserted by the hook from detaching from the opening of the hook portion in a relaxed state without lifting.

[0044] Embodiment six, as Fig.14 As shown, a flip-type safety unhooking crane hook device is adopted, which includes a hook support frame 3 with two side guard plates, a sling pulley mechanism 6 and a hook body with a connecting rod 101 and a bent hook portion, the connecting rod 101 is used as a hook handle, and the two sides of the main hook and the flip hook can adopt flat surfaces. The main hook 102 adopts an inverted T-shaped with a bilaterally symmetrical front end, and the bilaterally symmetrical front ends are respectively provided with flip hooks 107. The front ends of the two flip hooks 7 are both provided with upwardly tilted hook tips 173, and the tails are provided with a limit column 172 extending laterally to the side wall of the main hook. An arc-shaped shallow groove 171 is provided in the middle between the hook tip and the limit column. The lower parts of the two flip hooks are respectively connected to the bilaterally symmetrical front ends of the main hook through the horizontal 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 Example 5. The limiting columns of the two flip hooks 107 use the same electric control lock and positioning bolt as those provided on the longitudinal side wall of the corresponding main hook. The structures of the electric control lock and positioning bolt are the same as those in the fifth embodiment. A pressure plate can be provided at the lower end of the positioning bolt, or a pressure plate 152 with a clamp-shaped notch can be used. The limiting columns 172 at the tail of the two flip hooks are provided with an upper protrusion 176 with an arc-shaped end surface for embedding into the clamp-shaped notch. A push rod spring and / or an elastic anti-slip rod can also be provided. The flip hook 7 of the hook body can be hooked to the cable 13 of the load cargo, and the crane flip type quick and safe unhooking hook device can be applied to a variety of cranes and hoists.

[0045] The working principle and working process of the flip-type safety unhooking crane hook device are as follows: Fig.15 and Fig.16As shown, when the crane's flip-type quick safety unhooking hook and hook device assembly is working, the limit column of the flip hook 7 is locked by the positioning bolt. When the electric lock is in the locked state, the flip hook is in the locked position. The locked position makes the flip hook in an unstable equilibrium state in the direction of gravity. "Unstable equilibrium" refers to an object in equilibrium. Due to some small external effects, if the object deviates slightly, it cannot return to the original equilibrium state. This situation is called "unstable equilibrium". When the electric lock 10 is opened, the positioning bolt 105 is pushed upward, and the flip hook is unlocked. Under vibration or the gravity of the load cable 95, the flip hook uses the bottom center vertical line of the arc-shaped shallow groove of the flip hook in the locked position to slightly deviate to the outside of the main shaft center. After slightly deviating from the locked position, it will quickly rotate to the outside and downward, so that the load cable is separated from the hook body. After the flip hook is flipped, it is still connected to the main hook through the main shaft. The utility model can therefore avoid rollover caused by the dragging of the suspended object, resulting in loss of personnel and crane overturning. After the suspended object is separated from the crane, not only can the crane be saved from accidents, but also damage to the crane arm, the suspended object and the surrounding environment caused by the overturning of the crane can be avoided. At the same time, casualties of the crane driver can be avoided. It can be said that it kills two birds with one stone and protects the safety of the crane.

[0046] In summary, the purpose of the utility model is achieved.

Claims

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

2. The safety unhooking crane hook device according to claim 1, characterized in that: The hook is a wheeled hook that is rotatably arranged through the supporting shaft at the lower part of the supporting frame; the hook unhooking device is an arc-shaped hook groove with an unhooking opening arranged in the circumferential direction on the lower half of the hook, and an arc-shaped outer gear ring is arranged on the upper half; the driving motor is mounted in the middle part of the supporting frame, and the driving motor is connected to a gear transmission mechanism for engaging the arc-shaped outer gear ring to drive the hook unhooking device to rotate so that the unhooking opening of the hook rotates downward; the hook handle of the hook includes connecting arms on both sides and rollers arranged between the two connecting arms using wheel axles, and the rollers are rollingly arranged in the arc-shaped hook groove to hang the hook; the electric control lock is arranged on the hook supporting frame, and the electric control lock pin is inserted into the lock hole of the hook unhooking device; the signal receiver has a wireless signal receiving module.

3. The safety unhooking crane hook device according to claim 2, characterized in that: The motor output shaft of the driving motor is laterally rotatably mounted in the middle of the supporting frame, the gear transmission mechanism is a transmission gear arranged on the motor output shaft, the transmission gear is meshed with the arc-shaped outer gear ring, and the motor base is fixedly connected to the supporting frame.

4. The safety unhooking crane hook device according to claim 2, characterized in that: 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 outer gear ring. The drive motor is vertically fixed to the inner wall of the support frame, and the motor output shaft of the drive motor drives the right-angle reversing fan gear set to transmit and connect the gear shaft.

5. The safety unhooking crane hook device according to any one of claims 2 to 4, characterized in that: The radius of the bottom of the inner edge of the arc-shaped hook groove of the hook gradually increases from the root of the hook groove to the hook-release mouth.

6. The safety unhooking crane hook device according to claim 1, characterized in that: The hook unhooking device includes a flip hook hinged at the front end of the main hook of the hook; an upwardly tilted hook tip is arranged at the front end of the flip hook, a limiting column extending toward the side wall of the main hook is arranged at the tail of the flip hook, and an arc-shaped shallow groove for hanging the load cable is arranged between the hook tip and the limiting column; the lower part of the flip hook is rotatably connected to the main hook through a horizontal main shaft; the electric control lock and the 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 against the limiting column, 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 flip hook in the locked position is biased toward the outside of the main shaft, and the signal receiver has a wireless signal receiving module.

7. The safety unhooking crane hook device according to claim 6, characterized in that: The main hook is a single-body arc-shaped hook connected to a flip hook.

8. The safety unhooking crane hook device according to claim 6, characterized in that: The main hook is in an inverted T-shape with two symmetrical front ends, and the two symmetrical front ends are respectively provided with flip hooks.

9. The safety unhooking crane hook device according to any one of claims 6 to 8, characterized in that: The positioning bolt rod portion is sleeved with a push rod spring which elastically pushes the positioning bolt to slide upward.

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