A tower crane hook anti-falling device and method

Abstract

The present invention discloses a tower crane hook anti-fall device and method, which relates to the technical field of tower crane hooks, and aims to solve the problem that the performance of sensors and electronic equipment in the long-term operation of the existing device may decline due to wear and aging, and the particularity of the high-altitude working environment makes it difficult to trigger the locking mechanism in time and accurately when the hook falls, thereby failing to fully ensure the technical problem of the safety of the work site. The device includes a hook housing, a mounting plate arranged under the hook, a hook located between two mounting plates, and a guide platform. The present invention designs a pulley assembly, a clamping assembly, and a drive assembly, so that the device can not only lock the sling without the need for control methods such as sensors and electronic switches during use, but also can further ensure the stability of the sling after locking through a multi-layer locking method during use to avoid slipping, thereby improving the safety and stability of the device during use.

Description

Technical Field

[0001] The present invention relates to the technical field of tower crane hooks, and more specifically, to a tower crane hook anti-falling device and a method thereof. Background Art

[0002] When the tower crane is in working condition or in an accidental state and the height electrical limit fails, the hook will collide with the belly of the luffing trolley under the traction of the steel rope. When the steel rope loses its stretching distance and the power continues to pull, the steel rope will be broken; at this time, due to the broken steel rope, the hook and heavy objects will quickly fall from a high altitude to the ground, with disastrous consequences.

[0003] A Chinese patent document (CN116692688B) discloses a tower crane hook anti-fall device, which states in the specification that "it includes a hook and a wire rope, characterized in that it also includes a tension trigger mechanism and a hanging mechanism, the wire rope is passed through the middle of the hook, the tension trigger mechanism is arranged at the center of the hook, the hanging mechanism is arranged on the inner side of the hook near the edge, the wire rope passes through the center of the tension trigger mechanism, the hanging mechanism includes a clamping mechanism and a fixed point rolling mechanism, the fixed point rolling mechanism is arranged on the inner side of the upper part of the hook, the clamping mechanism is arranged between the fixed point rolling mechanisms, and the clamping mechanism sleeve It is arranged outside the wire rope. The present invention belongs to the technical field of tower crane hook anti-falling. The present invention solves the problems that are difficult to solve in the prior art, such as the failure of the tower crane hook anti-falling device to lock the wire rope in time, causing the wire rope to break, and the single-sided suspension causing the cargo to fall off. However, in actual use, it is based on the use of sensors and control switches. Once the electronic equipment is aged or damaged, it is difficult to continue to prevent the hook from falling, which limits its safety during use.

[0004] Although the existing anti-fall devices widely use advanced sensing instruments and electronic equipment, these technologies can indeed respond quickly and effectively prevent the accidental fall of the hook, thereby significantly improving the safety of the operation. However, their high cost of use and sensitivity to the external environment have become limitations that cannot be ignored.

[0005] Specifically, the performance of sensors and electronic devices in long-term operation may decline due to wear and aging. In addition, the particularity of the high-altitude working environment, such as high humidity, rain erosion and other harsh conditions, can easily lead to equipment rust, short circuit and other faults, thus affecting its accuracy and reliability. In this case, once the hook falls, these devices may not be able to trigger the locking mechanism in a timely and accurate manner, thereby failing to fully ensure the safety of the work site. In view of this, we propose a tower crane hook anti-fall device and method. Summary of the invention

[0006] The purpose of the present invention is to provide a tower crane hook anti-fall device and method thereof, so as to solve the technical problem that the performance of sensors and electronic equipment in the long-term operation of the existing device may deteriorate due to wear and aging, and the particularity of the high-altitude working environment makes it difficult to trigger the locking mechanism in time and accurately when the hook falls, thereby failing to fully ensure the safety of the work site.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a tower crane hook anti-falling device and method thereof, comprising:

[0008] A hook mechanism comprises a hook shell, a mounting plate arranged below the hook, a hook located between two mounting plates, a sling, a steering wheel and a guide platform, wherein the steering wheel is arranged inside the hook shell, the sling is arranged outside the steering wheel, and the guide platform is connected to the hook shell; and, a first locking mechanism comprises four pulley assemblies, eight limit assemblies and a plurality of snap-in assemblies, wherein the four pulley assemblies are respectively arranged between the eight limit assemblies, and the plurality of snap-in assemblies are all arranged inside the pulley assembly; and, a second locking mechanism comprises an extrusion assembly, a rotating assembly connected to the extrusion assembly and a driving assembly, wherein there are four driving assemblies, and the four driving assemblies are all connected to the rotating assembly.

[0009] During use, the present invention can lock the sling without the need for control methods such as sensors and electronic switches, and can further ensure the stability of the locked sling through multi-layer locking to avoid slipping, thereby improving the safety and stability of the device during use.

[0010] Preferably, there are two hook shells, and the bottoms of the two hook shells are fixedly connected to two mounting plates respectively, the hooks are arranged between the two mounting plates, the inner walls of the two hook shells are respectively engaged with the two steering wheels, the slings are located outside the two steering wheels, and the front and back sides of the guide platform are tightly welded to the opposite surfaces of the two hook shells respectively.

[0011] Preferably, the number of the pulley assemblies is four, the four pulley assemblies are respectively located in the eight limit assemblies, and the plurality of clamping assemblies are fixedly connected in the four pulley assemblies;

[0012] The pulley assembly is clamped on the opposite surfaces of the two hook shells, wherein four limit assemblies are fixedly connected to the front surface of the hook shell at the rear, and the remaining four limit assemblies are fixedly connected to the back surface of the hook shell at the front;

[0013] The extrusion assembly is meshed with the rotating assembly, and the rotating assembly is meshed with four driving assemblies;

[0014] The extrusion assembly is clamped on the top of the sling, the extrusion assembly is fixedly connected in the hook shell, the driving assembly is clamped on one side of the hook shell, and the rotating assembly is fixedly connected in the hook shell.

[0015] Preferably, the pulley assembly comprises a pulley, a plurality of reinforcing ribs are fixedly connected inside the pulley, and the plurality of reinforcing ribs are fixedly connected to the same driving shaft, two fixing blocks are fixedly connected outside the driving shaft, two ends of the driving shaft pass through the two fixing blocks and are respectively clamped in two first bearings, and a friction sleeve is fixedly connected outside the pulley;

[0016] The pulley is overlapped with the sling, the two fixed blocks are respectively located in the two limit assemblies, a plurality of clamping assemblies are fixedly connected outside the fixed blocks, and the two first bearings are respectively clamped on the opposite surfaces of the two hook shells.

[0017] Preferably, the limiting assembly comprises a limiting cylinder, a through hole is formed in the limiting cylinder, and the inner wall of the through hole is fixedly connected to a plurality of limiting teeth;

[0018] The limiting cylinder is fixedly connected to one side of the hook shell, and the limiting cylinder is sleeved outside the driving shaft. The gaps between the plurality of limiting clamping teeth are matched with the shape of the clamping assembly.

[0019] Preferably, the clamping assembly includes a sliding sleeve, a sliding rod is slidably connected inside the sliding sleeve, the top end of the sliding rod passes through the counterweight block and is fixedly connected to the bottom of the limit clamping block, the bottom end of the sliding rod is fixedly connected to a first spring, and the bottom end of the first spring is fixedly connected to the bottom of the inner wall of the sliding sleeve;

[0020] The shape of the limiting block is matched with the shape of the gaps between the plurality of limiting teeth, and the lower part of the sliding sleeve is fixedly connected to the outside of the fixing block.

[0021] Preferably, the extrusion assembly includes a positioning block, one side of the positioning block is fixedly connected to the sleeve, a movable rod is slidably connected inside the sleeve, the bottom end of the movable rod is fixedly connected to the top of the pressure plate, a second spring is connected to the outer cover of the movable rod, the top end of the movable rod is fixedly connected to the bottom of the base plate, the top and bottom ends of the second spring are respectively fixedly connected to the bottom of the base plate and the top of the sleeve, and the top of the base plate is fixedly connected to the bottom of the tooth plate;

[0022] The other side of the positioning block is fixedly connected to the hook housing, the tooth plate is meshed with the rotating assembly, and the lower part of the pressing plate is overlapped with the upper part of the sling.

[0023] Preferably, the rotating assembly comprises two first worms, and opposite ends of the two first worms are respectively connected to two connecting shafts, and the other ends of the two connecting shafts are respectively fixedly connected to two second worms, a second bearing is connected to the outer surface of the first worm, a first docking plate is clamped to the outer surface of the second bearing, a third bearing is connected to the outer surface of the second worm, a second docking plate is clamped to the outer surface of the third bearing, and opposite ends of the two second worms are fixedly connected to the same gear;

[0024] The first docking plate and the second docking plate are both fixedly connected to the hook housing, the two first worms and the two second worms are respectively meshed with the four driving components, the gears are meshed with the toothed plate, and the first worm and the second worm are arranged in reverse.

[0025] Preferably, the driving assembly comprises a turbine, a rotating shaft is fixedly connected inside the turbine, a fourth bearing is sleeved on one side of the rotating shaft, a transmission rod is fixedly connected outside the rotating shaft, and the other end of the transmission rod is fixedly connected to a plurality of friction blocks;

[0026] The fourth bearing is clamped in the hook housing, one end of four transmission rods provided with friction blocks are respectively arranged on both sides of the sling, and the four turbines are respectively meshed with the two first worm gears and the two second worm gears.

[0027] A method for using a tower crane hook anti-fall device comprises the following steps:

[0028] S1. When the sling breaks, due to the gravity of the hook shell and other structures, the device will fall rapidly, causing the pulley assemblies on both sides to slide rapidly outside the sling. At this time, the pulley assembly will rotate at high speed due to the contact with the sling, thereby driving the clamping assembly to extend, so that the clamping assembly is clamped into the limit assembly, and the pulley assembly will stop sliding due to the docking of the clamping assembly and the limit assembly, forming a preliminary lock. When the sling breaks, the pressure plate will move downward under the action of the second spring force due to the loss of contact with the lower sling, thereby driving the rotating assembly to rotate and controlling the driving assembly at the same time, so that the driving assembly rotates and is clamped outside the sling, forming a secondary lock.

[0029] S2. When the sling breaks and the device falls rapidly, the four pulleys arranged on both sides will rotate rapidly. Since the pulleys will synchronously drive the drive shaft to rotate at high speed when rotating, the slide bar and the counterweight will slide out along the slide sleeve under the centrifugal force generated by the high-speed rotation. At this time, the limit block at one end of the slide bar will quickly fit into the gap between the corresponding limit teeth, thereby limiting the rotation of the pulley. In normal use, since the sling is wound up slowly, the drive shaft will be in a low-speed rotation state;

[0030] S3. When the sling breaks and the pressure plate loses the extruded object, the second spring will squeeze the movable rod and the pressure plate downward. At this time, the toothed plate will drive the gear to rotate under the drive of the movable rod and the base plate, and in the process of gear rotation, the two first worm gears and the two second worm gears will drive the turbine to rotate, so that the four turbines on both sides rotate towards each other until the other end of the transmission rod contacts the sling, and because the transmission rods on both sides swing upward and the direction of the cable movement is consistent with it when the sling breaks, the transmission rod will pull the cable when it contacts the cable and clamp it in the direction of the cable again.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention designs a pulley assembly, a clamping assembly and a driving assembly. When the sling breaks, due to the gravity of the hook shell and other structures, the device will fall quickly, causing the pulley assemblies on both sides to slide quickly outside the sling. At this time, the pulley assembly will rotate at high speed due to contact with the sling, thereby driving the clamping assembly to extend, so that the clamping assembly is clamped into the limit assembly, and the pulley assembly will stop sliding due to the docking of the clamping assembly and the limit assembly, forming a preliminary lock. When the sling breaks, the pressure plate will move downward under the action of the second spring force due to the loss of contact with the lower sling, thereby driving the rotating assembly to rotate and controlling the driving assembly at the same time, so that the driving assembly rotates and is clamped outside the sling to form a secondary lock. During use, the device can not only lock the sling without using control methods such as sensors and electronic switches, but also can further ensure the stability of the sling after locking through a multi-layer locking method during use to avoid slipping, thereby improving the safety and stability of the device during use.

[0033] 2. The present invention also designs a pulley assembly and a limit assembly. When the sling breaks and the device falls rapidly, the four pulleys arranged on both sides will rotate rapidly. Since the pulleys will synchronously drive the drive shaft to rotate at high speed when rotating, the slide bar and the counterweight block will slide out along the slide sleeve quickly under the influence of the centrifugal force generated when rotating at high speed. At this time, the limit block at one end of the slide bar will quickly fit into the gap between the corresponding limit teeth, thereby limiting the rotation of the pulley. In normal use, since the sling is wound up at a slow speed, the drive shaft will be in a low-speed rotation state, thereby ensuring that the device will not be locked in normal use. Similarly, in the event of a fall, the device can self-lock in time to further delay the time for the sling to slip off and avoid the device from falling due to the breakage of the sling.

[0034] 3. The present invention also designs an extrusion assembly, a rotation assembly and a drive assembly. When the sling breaks and the pressure plate loses the extruded object, the second spring will squeeze the movable rod and the pressure plate downward. At this time, the toothed plate will drive the gear to rotate under the drive of the movable rod and the base plate, and in the process of the gear rotation, the two first worm gears and the two second worm gears will drive the turbine to rotate, so that the four turbines on both sides rotate towards each other until the other end of the transmission rod contacts the sling, and because the transmission rods on both sides swing upward and the direction of the movement of the sling when the sling breaks is consistent with it, therefore, when the transmission rod contacts the sling, it will pull the sling and clamp it in the direction of the sling again, so that the device can ensure the stability of the sling when it is locked, and on the other hand, the pulley delays the slipping time of the sling to ensure that the transmission rods on both sides can be stably clamped outside the sling, thereby increasing the possibility of preventing the device from falling and improving the safety of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 It is a schematic diagram of the structure of the hook mechanism of the present invention;

[0037] Figure 3 It is a schematic diagram of the cross-sectional structure of the hook mechanism of the present invention;

[0038] Figure 4 It is a schematic diagram of the cross-sectional structure of the pulley assembly of the present invention;

[0039] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0040] Figure 6 It is a schematic structural diagram of the second locking mechanism of the present invention;

[0041] Figure 7 It is a schematic diagram of the structure of the driving assembly of the present invention;

[0042] Figure 8 It is a schematic diagram of the exploded structure of the extrusion assembly of the present invention;

[0043] Fig. 9 For the present invention Figure 7 Enlarged schematic diagram of the structure at point B in the middle.

[0044] Description of the numbers in the figure:

[0045] 1. Hook mechanism; 2. First locking mechanism; 3. Second locking mechanism;

[0046] 101. hook housing; 102. mounting plate; 103. hook; 104. sling; 105. steering wheel; 106. guide platform;

[0047] 201, pulley assembly; 202, limit assembly; 203, clamping assembly;

[0048] 301, extrusion assembly; 302, rotation assembly; 303, driving assembly;

[0049] 2011, pulley; 2012, reinforcing rib; 2013, driving shaft; 2014, fixing block; 2015, friction sleeve; 2016, first bearing;

[0050] 2021, limiting cylinder; 2022, through hole; 2023, limiting tooth;

[0051] 2031, sliding sleeve; 2032, sliding rod; 2033, counterweight block; 2034, limit block; 2035, first spring;

[0052] 3011, positioning block; 3012, sleeve; 3013, movable rod; 3014, pressure plate; 3015, second spring; 3016, base plate; 3017, tooth plate;

[0053] 3021, first worm; 3022, second bearing; 3023, first docking plate; 3024, connecting shaft; 3025, second worm; 3026, third bearing; 3027, second docking plate; 3028, gear;

[0054] 3031. turbine; 3032. rotating shaft; 3033. transmission rod; 3034. friction block; 3035. fourth bearing. DETAILED DESCRIPTION

[0055] like Figures 1 to 8 As shown, the present invention relates to a tower crane hook anti-falling device and method thereof, comprising:

[0056] The hook mechanism 1 includes a hook housing 101, a mounting plate 102 disposed below the hook 103, a hook 103 located between the two mounting plates 102, a sling 104, a steering wheel 105, and a guide platform 106, wherein the steering wheel 105 is disposed inside the hook housing 101, the sling 104 is disposed outside the steering wheel 105, and the guide platform 106 is connected to the hook housing 101; and a first locking mechanism 2, including four pulley assemblies 201, eight limit assemblies 202, and a plurality of clamping assemblies 203, wherein four pulley assemblies The components 201 are respectively arranged between the eight limit components 202, and the plurality of clamping components 203 are all arranged in the pulley component 201; and the second locking mechanism 3 includes an extrusion component 301, a rotation component 302 connected to the extrusion component 301, and a driving component 303, wherein there are four driving components 303, and the four driving components 303 are all connected to the rotation component 302. By designing the pulley component 201, the clamping component 203 and the driving component 303, when the sling 104 breaks, due to the hook housing 101 and other structures Due to the gravity of the structure, the device will fall quickly, causing the pulley assemblies 201 on both sides to slide quickly outside the sling 104. At this time, the pulley assembly 201 will rotate at a high speed due to the contact with the sling 104, thereby driving the clamping assembly 203 to extend, so that the clamping assembly 203 is clamped into the limiting assembly 202, and the pulley assembly 201 will stop sliding due to the docking of the clamping assembly 203 and the limiting assembly 202, forming a preliminary lock. When the sling 104 breaks, the pressure plate 3014 will lose contact with the lower sling 104 and rebound on the second spring 3015. The sling 104 is locked by the rotation component 302, thereby the sling 104 is locked by the rotation component 302 and the driving component 303 is controlled. The driving component 303 is locked by the rotation component 302 and the driving component 303 is locked. The sling 104 is locked by the multi-layer locking method, and the stability of the sling 104 after locking is further ensured to avoid slipping. The safety and stability of the sling 104 are improved during use.

[0057] In the embodiment of the present invention, the number of hook housings 101 is two, and the lower parts of the two hook housings 101 are fixedly connected to the two mounting plates 102 respectively, the hook 103 is arranged between the two mounting plates 102, the inner walls of the two hook housings 101 are respectively engaged with the two steering wheels 105, the sling 104 is located outside the two steering wheels 105, the front and back sides of the guide platform 106 are respectively tightly welded to the opposite surfaces of the two hook housings 101, the number of the pulley assemblies 201 is four, and the four pulley assemblies 201 are respectively located at the eight limit assemblies 202 The plurality of clamping assemblies 203 are fixedly connected to the four pulley assemblies 201, the pulley assemblies 201 are clamped on the opposite surfaces of the two hook housings 101, the four limiting assemblies 202 are fixedly connected to the front of the hook housing 101 at the rear, the remaining four limiting assemblies 202 are fixedly connected to the back of the hook housing 101 at the front, the extrusion assembly 301 is meshed with the rotating assembly 302, the rotating assembly 302 is meshed with the four driving assemblies 303, the extrusion assembly 301 is clamped on the top of the sling 104, the extrusion assembly 301 is fixedly connected The hook housing 101 is connected to the driving assembly 303, which is clamped on one side of the hook housing 101. The rotating assembly 302 is fixedly connected to the hook housing 101. By designing the pulley assembly 201 and the limit assembly 202, when the sling 104 breaks and causes the device to fall rapidly, the four pulleys 2011 arranged on both sides will rotate rapidly. Since the pulley 2011 will synchronously drive the driving shaft 2013 to rotate at a high speed when rotating, the sliding rod 2032 and the counterweight block 2033 will quickly slide out along the sliding sleeve 2031 due to the centrifugal force generated when rotating at a high speed. At this time, the limit block 2034 at one end of the slide bar 2032 will quickly get into the gap between the corresponding limit teeth 2023, thereby limiting the rotation of the pulley 2011. In normal use, due to the slow winding speed of the sling 104, the drive shaft 2013 will be in a low-speed rotation state, thereby ensuring that the device will not be locked in normal use. Similarly, in the event of a fall, the device can self-lock in time, further delaying the time for the sling 104 to slip off, and avoiding the device from falling due to the breakage of the sling 104.

[0058] In an embodiment of the present invention, the pulley assembly 201 includes a pulley 2011, a plurality of reinforcing ribs 2012 are fixedly connected inside the pulley 2011, and the plurality of reinforcing ribs 2012 are fixedly connected to the same driving shaft 2013, two fixing blocks 2014 are fixedly connected outside the driving shaft 2013, two ends of the driving shaft 2013 pass through the two fixing blocks 2014 and are respectively clamped in two first bearings 2016, a friction sleeve 2015 is fixedly connected outside the pulley 2011, the pulley 2011 is overlapped with the sling 104, the two fixing blocks 2014 are respectively located in the two limit assemblies 202, a plurality of clamping assemblies 203 are fixedly connected outside the fixing blocks 2014, and the two first bearings 201 6 are respectively clamped on the opposite surfaces of the two hook shells 101, the limiting assembly 202 includes a limiting cylinder 2021, a through hole 2022 is opened in the limiting cylinder 2021, the inner wall of the through hole 2022 is fixedly connected to a plurality of limiting teeth 2023, the limiting cylinder 2021 is fixedly connected to one side of the hook shell 101, the limiting cylinder 2021 is sleeved outside the driving shaft 2013, the gap between the plurality of limiting teeth 2023 is adapted to the shape of the clamping assembly 203, by designing the extrusion assembly 301, the rotating assembly 302 and the driving assembly 303, when the sling 104 breaks and the pressure plate 3014 loses the extrusion object, the second spring 3015 will squeeze the movable rod 3013 and the pressure plate 3 014 moves downward, at this time, the tooth plate 3017 will drive the gear 3028 to rotate under the drive of the movable rod 3013 and the base plate 3016, and during the rotation of the gear 3028, the two first worm gears 3021 and the two second worm gears 3025 will drive the turbine 3031 to rotate, so that the four turbines 3031 on both sides rotate towards each other until the other end of the transmission rod 3033 contacts the sling 104, and because the transmission rods 3033 on both sides swing upward, when the sling 104 breaks, the movement direction of the sling 104 is consistent with it. Therefore, when the transmission rod 3033 contacts the sling 104, it will pull the sling 104 and clamp it in the direction of the sling 104 again, so that the device On the one hand, the arrangement can ensure the stability of the sling 104 when it is locked. The ends of the transmission rods 3033 on both sides that are close to each other are provided with limiting arc teeth, and the ends of the limiting arc teeth that are away from the transmission rod 3033 are provided with rubber pads. The rubber pads can increase the friction between the transmission rod 3033 and the sling 104. The rubber pads are used to drive the transmission rod 3033 to rotate, and the arc teeth can better contact with the sling 104, thereby improving the limiting effect. On the other hand, the pulley 2011 is used to delay the slipping time of the sling 104 to ensure that the transmission rods 3033 on both sides can be stably connected to the outside of the sling 104, thereby increasing the possibility of preventing the device from falling and improving the safety of using the device.

[0059] As another embodiment of the present invention, the clamping assembly 203 includes a sliding sleeve 2031, a sliding rod 2032 is slidably connected inside the sliding sleeve 2031, the top of the sliding rod 2032 passes through the counterweight block 2033 and is fixedly connected to the bottom of the limiting clamping block 2034, the bottom end of the sliding rod 2032 is fixedly connected to the first spring 2035, the bottom end of the first spring 2035 is fixedly connected to the bottom of the inner wall of the sliding sleeve 2031, and the shape of the limiting clamping block 2034 is adapted to the shape of the gap between the plurality of limiting clamping teeth 2023, such as Figure 5 The left side surface of the limit block 2034 and the right side surface of the limit tooth 2023 are both inclined. When the left side surface of the limit block 2034 contacts the right side surface of the limit tooth 2023, the limit block 2034 will continue to slide toward the limit tooth 2023 under the influence of the inclined surface, and the two will not separate. The lower part of the sliding sleeve 2031 is fixedly connected to the outside of the fixed block 2014. The extrusion assembly 301 includes a positioning block 3011, one side of the positioning block 3011 is fixedly connected to the sleeve 3012, and a movable rod 3013 is slidably connected in the sleeve 3012. The bottom end of the movable rod 3013 is fixedly connected to the top of the pressing plate 3014, and a second spring 3015 is connected to the outer sleeve of the movable rod 3013. The top end of the movable rod 3013 is fixedly connected to the bottom of the base plate 3016, and the top and bottom ends of the second spring 3015 are respectively connected to the bottom and The upper part of the sleeve 3012 is fixedly connected, the upper part of the base plate 3016 is fixedly connected to the lower part of the tooth plate 3017, the other side of the positioning block 3011 is fixedly connected to the hook housing 101, the tooth plate 3017 is meshed with the rotating assembly 302, and the lower part of the pressure plate 3014 is overlapped with the upper part of the sling 104. Because the counterweight block 2033 is provided, under the normal use state, due to insufficient centrifugal force, the first spring 2035 can pull the slide bar 2032 to be located in the slide sleeve 2031. When the sling 104 breaks and causes the driving shaft 2013 to rotate at a high speed, the centrifugal force directly acts on the counterweight block 2033, resulting in the elastic force of the first spring 2035 being insufficient to pull the slide bar 2032. At this time, the slide bar 2032 will slide in the slide sleeve 2031, thereby ensuring that the slide bar 2032 can stably slide in the slide sleeve 2031 when the sling 104 breaks.

[0060] By arranging a rolling ball under the pressing plate 3014, and the rolling ball can roll under the pressing plate 3014, the friction between the pressing plate 3014 and the sling 104 is reduced;

[0061] Due to the provision of the friction sleeve 2015, the friction between the sling 104 and the pulley 2011 is increased. On the one hand, the rotation speed when the pulley 2011 contacts the sling 104 can be guaranteed. On the other hand, when the pulley 2011 is locked, the sliding of the sling 104 can be slowed down or the sling 104 can be fixed. In addition, since the transmission rod 3033 and the friction block 3034 are not in contact with the rope at ordinary times, the loss caused by the friction of the rope is reduced.

[0062] As another embodiment of the present invention, the rotating assembly 302 includes two first worm gears 3021, and the opposite ends of the two first worm gears 3021 are respectively connected to two connecting shafts 3024, and the connecting shaft 3024 is composed of a rotating shaft and a rubber rod. The rubber rod can buffer the force generated by the transmission rod 3033 when it contacts the sling 104, which drives the turbine 3031 to rotate and squeeze the first worm gear 3021, thereby preventing the first worm gear 3021 from being damaged. The other ends of the two connecting shafts 3024 are respectively fixedly connected to two second worm gears 3025, and the first worm gear 3021 is outer-mounted with a second The first and second worm gears 3021 and 3025 are both composed of worm gears and rubber rods. The third bearing 3026 is externally connected to the second worm gear 3027. The opposite ends of the two second worm gears 3025 are fixedly connected to the same gear 3028. The first and second worm gears 3021 and 3025 are externally connected to the first and second worm gears 3023 and 3027. The first and second worm gears 3021 and 3025 are respectively connected to the four drive components 3028. 03 meshes with each other, the gear 3028 meshes with the tooth plate 3017, the first worm 3021 and the second worm 3025 are arranged in reverse, the driving assembly 303 includes a turbine 3031, a rotating shaft 3032 is fixedly connected inside the turbine 3031, a fourth bearing 3035 is sleeved on one side of the rotating shaft 3032, a transmission rod 3033 is fixedly connected outside the rotating shaft 3032, the other end of the transmission rod 3033 is fixedly connected to a plurality of friction blocks 3034, the fourth bearing 3035 is clamped in the hook housing 101, and one end of the four transmission rods 3033 provided with friction blocks 3034 are respectively Set on both sides of the sling 104, four turbines 3031 are respectively meshed with the two first worm gears 3021 and the two second worm gears 3025. By setting the turbine 3031, the first worm gear 3021 and the second worm gear 3025, since the first worm gear 3021, the second worm gear 3025 and the turbine 3031 have a certain self-locking property, it is difficult for the device to release the restriction on the sling 104 due to repeated shaking, thereby improving the stability of the device when positioning the sling 104, and in combination with the swing angle of the four transmission rods 3033, the heavier the device, the more stable the locking effect.

[0063] Working principle: This embodiment provides a tower crane hook anti-fall device and method thereof. When the sling 104 breaks, due to the gravity of the hook shell 101 and other structures, the device will fall rapidly, causing the pulley assemblies 201 on both sides to slide rapidly outside the sling 104. At this time, the pulley assembly 201 will rotate at high speed due to the contact with the sling 104, thereby driving the clamping assembly 203 to extend, so that the clamping assembly 203 is clamped into the limiting assembly 202, and the pulley assembly 201 will stop sliding due to the docking of the clamping assembly 203 with the limiting assembly 202, forming a preliminary lock. When the sling 104 breaks, the pressure plate 3014 will move downward under the action of the elastic force of the second spring 3015 due to the loss of contact with the lower sling 104, thereby driving the rotating assembly 302 to rotate while controlling the driving assembly 303, so that the driving assembly 303 rotates and is clamped outside the sling 104, forming a secondary lock.

[0064] When the sling 104 breaks and the device falls rapidly, the four pulleys 2011 arranged on both sides will rotate rapidly. Since the pulleys 2011 will synchronously drive the driving shaft 2013 to rotate at high speed when rotating, the sliding rod 2032 and the counterweight block 2033 will slide out along the sliding sleeve 2031 under the action of the centrifugal force generated by the high-speed rotation. At this time, the limiting block 2034 at one end of the sliding rod 2032 will quickly get into the gap between the corresponding limiting teeth 2023, thereby limiting the rotation of the pulley 2011. In normal use, since the winding speed of the sling 104 is slow, the driving shaft 2013 will be in a low-speed rotation state;

[0065] When the sling 104 breaks and the pressure plate 3014 loses the extruded object, the second spring 3015 will squeeze the movable rod 3013 and the pressure plate 3014 to move downward. At this time, the tooth plate 3017 will drive the gear 3028 to rotate under the drive of the movable rod 3013 and the base plate 3016, and in the process of the rotation of the gear 3028, the two first worm gears 3021 and the two second worm gears 3025 will drive the turbine 3031 to rotate, so that the four turbines 3031 on both sides rotate towards each other until the other end of the transmission rod 3033 contacts the sling 104, and because the transmission rods 3033 on both sides swing upward, the direction of movement of the sling 104 when the sling 104 breaks is consistent with it. Therefore, when the transmission rod 3033 contacts the sling 104, it will pull the sling 104 and clamp it in the direction of the sling 104 again.

[0066] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A tower crane hook anti-fall device, It is characterized in that include, A hook mechanism (1) comprises a hook housing (101), a mounting plate (102) arranged below the hook (103), a hook (103) located between two mounting plates (102), a sling (104), a steering wheel (105) and a guide platform (106), wherein the steering wheel (105) is arranged inside the hook housing (101), the sling (104) is arranged outside the steering wheel (105), and the guide platform (106) is connected to the hook housing (101); and, A first locking mechanism (2) comprises four pulley assemblies (201), eight limit assemblies (202) and a plurality of clamping assemblies (203), wherein the four pulley assemblies (201) are respectively arranged between the eight limit assemblies (202), and the plurality of clamping assemblies (203) are all arranged inside the pulley assemblies (201); and, The second locking mechanism (3) comprises an extrusion assembly (301), a rotation assembly (302) connected to the extrusion assembly (301), and a drive assembly (303), wherein there are four drive assemblies (303) and the four drive assemblies (303) are all connected to the rotation assembly (302), and the extrusion assembly (301) is clamped above the sling (104); The extrusion assembly (301) comprises a positioning block (3011), one side of the positioning block (3011) is fixedly connected to a sleeve (3012), a movable rod (3013) is slidably connected inside the sleeve (3012), the bottom end of the movable rod (3013) is fixedly connected to the top of a pressure plate (3014), a second spring (3015) is connected to the outer sleeve of the movable rod (3013), the top end of the movable rod (3013) is fixedly connected to the bottom of a base plate (3016), the top and bottom ends of the second spring (3015) are respectively fixedly connected to the bottom of the base plate (3016) and the top of the sleeve (3012), and the top of the base plate (3016) is fixedly connected to the bottom of a tooth plate (3017); The other side of the positioning block (3011) is fixedly connected to the hook housing (101), the tooth plate (3017) is meshed with the rotating assembly (302), and the lower part of the pressing plate (3014) is overlapped with the upper part of the sling (104); The rotating assembly (302) comprises two first worm gears (3021), and opposite ends of the two first worm gears (3021) are respectively connected to two connecting shafts (3024), and the other ends of the two connecting shafts (3024) are respectively fixedly connected to two second worm gears (3025); the first worm gear (3021) is outer-mounted with a second bearing (3022), the second bearing (3022) is externally clamped with a first docking plate (3023), the second worm gear (3025) is outer-mounted with a third bearing (3026), the third bearing (3026) is externally clamped with a second docking plate (3027), and opposite ends of the two second worm gears (3025) are fixedly connected to the same gear (3028); The first docking plate (3023) and the second docking plate (3027) are both fixedly connected to the hook housing (101); the two first worm gears (3021) and the two second worm gears (3025) are respectively meshed with the four drive components (303); the gear (3028) is meshed with the toothed plate (3017); and the first worm gear (3021) and the second worm gear (3025) are arranged in opposite directions; The driving assembly (303) comprises a turbine (3031), a rotating shaft (3032) is fixedly connected inside the turbine (3031), a fourth bearing (3035) is sleeved on one side of the rotating shaft (3032), a transmission rod (3033) is fixedly connected outside the rotating shaft (3032), and the other end of the transmission rod (3033) is fixedly connected to a plurality of friction blocks (3034); The fourth bearing (3035) is clamped in the hook housing (101), one end of four transmission rods (3033) provided with friction blocks (3034) are respectively arranged on both sides of the sling (104), and the four turbines (3031) are respectively meshed with the two first worm gears (3021) and the two second worm gears (3025); The pulley assembly (201) comprises a pulley (2011), the pulley (2011) is fixedly connected to a plurality of reinforcing ribs (2012) inside, and the plurality of reinforcing ribs (2012) are fixedly connected to the same driving shaft (2013), the driving shaft (2013) is fixedly connected to two fixing blocks (2014) outside, two ends of the driving shaft (2013) pass through the two fixing blocks (2014) and are respectively clamped in two first bearings (2016), and the pulley (2011) is fixedly connected to a friction sleeve (2015) outside; The pulley (211) is overlapped with the sling (104), the two fixed blocks (2014) are respectively located in the two limit assemblies (202), the plurality of clamping assemblies (203) are all fixedly connected to the outside of the fixed blocks (2014), and the two first bearings (2016) are respectively clamped to the opposite surfaces of the two hook housings (101); The limiting assembly (202) comprises a limiting cylinder (2021), a through hole (2022) is provided in the limiting cylinder (2021), and the inner wall of the through hole (2022) is fixedly connected to a plurality of limiting latch teeth (223); The limiting cylinder (2021) is fixedly connected to one side of the hook housing (101), the limiting cylinder (2021) is sleeved outside the driving shaft (2013), and the gap between the plurality of limiting teeth (2023) is adapted to the shape of the clamping assembly (203); The clamping assembly (203) comprises a sliding sleeve (2031), a sliding rod (2032) is slidably connected inside the sliding sleeve (2031), the top end of the sliding rod (2032) passes through the counterweight block (2033) and is fixedly connected to the bottom of the limit clamping block (2034), the bottom end of the sliding rod (2032) is fixedly connected to a first spring (2035), and the bottom end of the first spring (2035) is fixedly connected to the bottom of the inner wall of the sliding sleeve (2031); The shape of the limiting clamping block (2034) is adapted to the shape of the gaps between the plurality of limiting clamping teeth (2023), and the lower part of the sliding sleeve (2031) is fixedly connected to the outside of the fixing block (2014).

2. The tower crane hook anti-fall device according to claim 1, It is characterized in that There are two hook shells (101), and the bottoms of the two hook shells (101) are fixedly connected to the two mounting plates (102), respectively; the hook (103) is arranged between the two mounting plates (102); the inner walls of the two hook shells (101) are respectively engaged with the two steering wheels (105); the sling (104) is located outside the two steering wheels (105); and the front and back surfaces of the guide platform (106) are tightly welded to the opposite surfaces of the two hook shells (101).

3. The tower crane hook anti-fall device according to claim 2, It is characterized in that The number of the pulley assemblies (201) is four, the four pulley assemblies (201) are respectively located in the eight limit assemblies (202), and the plurality of clamping assemblies (203) are all fixedly connected in the four pulley assemblies (201); The pulley assembly (201) is clamped on opposite surfaces of the two hook housings (101), wherein four limit assemblies (202) are fixedly connected to the front surface of the hook housing (101) located at the rear, and the remaining four limit assemblies (202) are fixedly connected to the back surface of the hook housing (101) located at the front; The extrusion component (301) is meshed with the rotating component (302), and the rotating component (302) is meshed with four driving components (303); The extrusion assembly (301) is clamped on the top of the sling (104), the extrusion assembly (301) is fixedly connected in the hook housing (101), the driving assembly (303) is clamped on one side of the hook housing (101), and the rotating assembly (302) is fixedly connected in the hook housing (101).

4. A method for using a tower crane hook anti-fall device according to claim 3, It is characterized in that The following steps are involved: S1. When the sling (104) breaks, due to the gravity of the hook housing (101) and other structures, the hook mechanism (1) will fall rapidly, causing the pulley assemblies (201) on both sides to slide rapidly outside the sling (104). At this time, the pulley assembly (201) will rotate at a high speed due to contact with the sling (104), thereby driving the clamping assembly (203) to extend, causing the clamping assembly (203) to be clamped into the limit assembly (202), and the pulley assembly (201) will The sliding of the clamping assembly (203) and the limiting assembly (202) stops due to the docking, thus forming a preliminary lock. When the sling (104) breaks, the pressing plate (3014) loses contact with the sling (104) below and moves downward under the action of the elastic force of the second spring (3015), thereby driving the rotating assembly (302) to rotate and controlling the driving assembly (303) at the same time, so that the driving assembly (303) rotates and is clamped outside the sling (104), thus forming a secondary lock. S2. When the sling (104) breaks and causes the hook mechanism (1) to fall rapidly, the four pulleys (2011) arranged on both sides will rotate rapidly. Since the pulleys (2011) will synchronously drive the driving shaft (2013) to rotate at high speed when rotating, the sliding rod (2032) and the counterweight (2033) will quickly slide out along the sliding sleeve (2031) due to the centrifugal force generated when rotating at high speed. At this time, the limiting block (2034) at one end of the sliding rod (2032) will quickly get into the gap between the corresponding limiting teeth (2023), thereby limiting the rotation of the pulley (2011). In normal use, since the winding speed of the sling (104) is slow, the driving shaft (2013) will be in a low-speed rotation state; S3. When the sling (104) breaks and the pressing plate (3014) loses the extruded object, the second spring (3015) will squeeze the movable rod (3013) and the pressing plate (3014) downward. At this time, the toothed plate (3017) will drive the gear (3028) to rotate under the drive of the movable rod (3013) and the base plate (3016). In the process of the gear (3028) rotating, the two first worm gears (3021) and the two second worm gears (3021) will rotate. 5) driving the turbine (3031) to rotate, so that the four turbines (3031) on both sides rotate towards each other until the other end of the transmission rod (3033) contacts the sling (104), and because the transmission rods (3033) on both sides swing upward, the direction in which the sling (104) moves when the sling (104) breaks is consistent with it. Therefore, when the transmission rod (3033) contacts the sling (104), it pulls the sling (104) and clamps it in the direction of the sling (104) again.

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