Crane lifting appliance with pressure early warning function

Abstract

A crane lifting appliance with a pressure early warning function comprises a lifting appliance plate, assembling grooves are formed in the two ends of the lifting appliance plate, and lifting hooks are rotationally connected to the outer ends of the assembling grooves; an assembly box is arranged below the lifting appliance plate, a pressure early warning device is arranged in the assembly box, a box cover is detachably fixed to the top of the assembly box, a first through hole is formed in the top of the box cover, and the detection end of the pressure early warning device extends out of the first through hole; a plurality of connecting rods are fixed to the two sides of the bottom of the lifting appliance plate, second through holes corresponding to the connecting rods are formed in the box cover, and the bottoms of the connecting rods penetrate through the corresponding second through holes and are in threaded connection with assembly nuts; an assembly frame is detachably fixed to the top of the box cover and penetrates through the assembly groove, and a pulley is rotationally connected to the top of the assembly frame. The pressure early warning device has a pressure early warning function, and is convenient for early warning of cargo overweight.

Description

Technical Field

[0001] This utility model relates to the technical field of cranes, and specifically to a crane lifting device with a pressure warning function. Background Technology

[0002] A crane is a mechanical device used for material handling in construction sites, ports, warehouses, factories, and other locations. It can lift, lower, and move heavy objects horizontally to achieve spatial displacement. There are many types of cranes, and their applications are widespread. A crane generally consists of a bridge frame, on which a trolley capable of moving left and right is mounted. An electric hoist is detachably fixed to the trolley, and a wire rope is wound around the electric hoist. A crane lifting device is installed on the wire rope. The crane lifting device is a crucial component connecting the crane to the object being lifted, ensuring the safe and efficient lifting and handling of goods.

[0003] The most common crane lifting device is the hook, which is suitable for goods of various shapes and sizes. Hooks are usually made of high-strength steel and can withstand large tensile forces. However, when the transported goods are severely overweight, the wire rope is prone to breakage, which can easily cause major safety accidents. However, the hook has a relatively simple structure, making it inconvenient to install load monitoring devices on it and to provide early warnings of overweight goods. Utility Model Content

[0004] The purpose of this utility model is to provide a crane lifting device with a pressure warning function, which solves the technical problem that the structure of the above-mentioned hook is relatively simple, making it inconvenient to install load monitoring devices on it and inconvenient to provide early warning of overweight cargo.

[0005] The technical solution adopted by this utility model is as follows:

[0006] A crane lifting device with pressure warning function includes a lifting plate with assembly slots at both ends and a hook rotatably connected to the outer end of each assembly slot. An assembly box is located below the lifting plate, containing a pressure warning device. A cover is detachably fixed to the top of the assembly box, with a first through hole at the top of the cover. The detection end of the pressure warning device extends beyond the first through hole. Several connecting rods are fixed to both sides of the bottom of the lifting plate. The cover has second through holes corresponding to the connecting rods, with the bottom of each connecting rod passing through the corresponding second through hole and threaded with an assembly nut. An assembly frame is detachably fixed to the top of the cover, passing through an assembly slot, and a pulley is rotatably connected to the top of the assembly frame.

[0007] An assembly block is fixed to the top of the hook, and assembly shafts are fixed to both sides of the assembly block; symmetrical sliders are detachably fixed in the assembly slot, and assembly holes are provided on the inner side of the sliders, with bearings that mate with the assembly shafts fixed in the assembly holes.

[0008] The side of the lifting plate is provided with a strip-shaped adjustment hole that communicates with the assembly slot. An adjustment screw is threaded to the outside of the slider, and the outer end of the adjustment screw extends to the corresponding adjustment hole and is threaded to an adjustment nut.

[0009] The pressure warning device includes a controller, a pressure sensor, an alarm, and a power supply that are detachably fixed inside the assembly box. The pressure sensor, alarm, and power supply are electrically connected to the controller. The detection end of the pressure warning device is the top of the pressure sensor.

[0010] An assembly plate is fixed at the top edge of the assembly box. The assembly plate and the box cover are detachably and fixedly connected by assembly bolts. The assembly plate is also provided with a second through hole that mates with the connecting rod. The bottom of the connecting rod passes through the second through hole on the box cover and the second through hole on the assembly plate in sequence. The assembly nut is threaded with the connecting rod and is pressed against the bottom of the assembly plate.

[0011] Several elastic elements are provided between the box cover and the lifting plate. The number of elastic elements corresponds one-to-one with the number of connecting rods. The elastic elements are springs that are sleeved on the outside of the connecting rods.

[0012] The assembly frame includes a fixing plate, which is detachably fixed to the top of the box cover by screws. Symmetrical vertical plates are fixed on the fixing plate, and the two vertical plates pass through corresponding assembly slots. The pulley is rotatably connected between the two corresponding vertical plates.

[0013] The side of the assembly box has a third through hole, and the outer end of the alarm extends to the outside of the third through hole.

[0014] In this invention, the lifting plate has assembly slots at both ends, and hooks are rotatably connected to the outer ends of the assembly slots. Two hooks work together to hook and hang goods. An assembly box is located below the lifting plate, and a pressure warning device is installed inside the assembly box, giving the lifting device a pressure warning function. The detection end of the pressure warning device is used to detect the pressure from the lifting plate. The lifting plate and the box cover are connected by a connecting rod and an assembly nut. An assembly frame is detachably fixed to the top of the box cover. The assembly frame passes through the assembly slot, and a pulley is rotatably connected to the top of the assembly frame. The pulley is used to cooperate with the wire rope of the electric hoist on the crane. In use, the pulley cooperates with the wire rope of the electric hoist, and the crane lifting device is hoisted. When goods are hooked on the hooks, the goods will pull the lifting plate downwards through the hooks. The lifting plate contacts the detection end of the pressure warning device and applies downward pressure to it. The pressure warning device detects the pressure and issues a warning when the load is too high. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This is a top view of the assembly box.

[0018] In the diagram: 1-Lifting plate, 2-Pulley, 3-Assembly frame, 4-Connecting rod, 5-Spring, 6-Pressure sensor, 7-Box cover, 8-Assembly plate, 9-Vertical plate, 10-Adjusting hole, 11-Adjusting nut, 12-Slider, 13-Adjusting screw, 14-Hook, 15-Fixing plate, 16-Assembly bolt, 17-Assembly box, 18-Assembly nut, 19-Alarm, 20-Third through hole, 21-Controller, 22-Second through hole, 23-Power supply, 24-Assembly block, 25-Assembly shaft. Detailed Implementation

[0019] like Figures 1-3 As shown, a crane spreader with pressure warning function includes a spreader plate 1. Both ends of the spreader plate 1 are provided with mounting slots. In this embodiment, the mounting slots are U-shaped, and hooks 14 are rotatably connected to the outer ends of the mounting slots. Two hooks 14 cooperate to hook and hang goods. An assembly box 17 is provided below the spreader plate 1. A pressure warning device is installed inside the assembly box 17, enabling the spreader to have a pressure warning function. A box cover 7 is detachably fixed to the top of the assembly box 17 for easy installation and removal. The top of the box cover 7 has a first through hole, and the detection end of the pressure warning device extends outside the first through hole for easy contact with the spreader plate 1 for detection. Several connecting rods 4 are fixed on both sides of the bottom of the lifting plate 1. The cover 7 is provided with a second through hole 22 corresponding to the connecting rod 4. The bottom of the connecting rod 4 passes through the corresponding second through hole 22 and is threaded with an assembly nut 18. The connecting rod 4 can move along the second through hole 22, which is convenient for installation and also convenient for adapting to the movement of the lifting plate 1. The lifting plate 1 and the cover 7 are connected by the connecting rod 4 and the assembly nut 18. The top of the cover 7 is detachably fixed with an assembly frame 3. The assembly frame 3 passes through the assembly groove. The top of the assembly frame 3 is rotatably connected with a pulley 2. The pulley 2 is used to cooperate with the wire rope of the electric hoist on the crane.

[0020] An assembly block 24 is fixed to the top of the hook 14, and assembly shafts 25 are fixed to both sides of the assembly block 24. Symmetrical sliders 12 are detachably fixed in the assembly groove. The inner side of the slider 12 is provided with an assembly hole, and a bearing that cooperates with the assembly shaft 25 is fixed in the assembly hole, so that the hook 14 can rotate and is convenient for hooking goods.

[0021] The side of the lifting plate 1 is provided with a strip-shaped adjustment hole 10 that communicates with the assembly groove. The outer side of the slider 12 is threaded with an adjustment screw 13. The outer end of the adjustment screw 13 extends to the corresponding adjustment hole 10 and is threaded with an adjustment nut 11, so as to adjust the position of the hook 14 as needed. When it is necessary to adjust the position of the hook 14, loosen the adjustment nut 11, slide the slider 12 to the appropriate position, move the adjustment screw 13 along the adjustment hole 10 to the appropriate position, and then tighten the adjustment nut 11.

[0022] The pressure warning device includes a controller 21, a pressure sensor 6, an alarm 19, and a power supply 23, which are detachably fixed in the assembly box 17. The pressure sensor 6, the alarm 19, and the power supply 23 are electrically connected to the controller 21. The controller 21 is preferably a PLC controller. The power supply 23 provides power to the controller 21. The pressure sensor 6 is used to detect the pressure from the lifting plate 1. The alarm 19 is used to sound an alarm. The alarm 19 is preferably an audible and visual alarm. The detection end of the pressure warning device is the top of the pressure sensor 6, that is, the top of the pressure sensor 6 extends to the outside of the first through hole.

[0023] An assembly plate 8 is fixed at the top edge of the assembly box 17. The assembly plate 8 and the box cover 7 are detachably fixedly connected by assembly bolts 16, which facilitates installation and disassembly. The assembly plate 8 is also provided with a second through hole 22 that cooperates with the connecting rod 4. The bottom of the connecting rod 4 passes through the second through hole 22 on the box cover 7 and the second through hole 22 on the assembly plate 8 in sequence. The assembly nut 18 is threadedly engaged with the connecting rod 4 and is pressed against the bottom of the assembly plate 8.

[0024] Several elastic elements are provided between the box cover 7 and the lifting plate 1. The number of elastic elements corresponds one-to-one with the number of connecting rods 4. The elastic elements are springs 5 ​​sleeved on the connecting rods 4, which play a buffering role and facilitate the protection of pressure sensor 6.

[0025] The assembly frame 3 includes a fixing plate 15, which is detachably fixed to the top of the box cover 7 by screws for easy installation and disassembly. Symmetrical vertical plates 9 are fixed on the fixing plate 15, and the two vertical plates 9 pass through the corresponding assembly slots. The pulley 2 is rotatably connected between the two corresponding vertical plates 9.

[0026] The side of the assembly box 17 is provided with a third through hole 20, and the outer end of the alarm 19 extends to the outside of the third through hole 20 for easy viewing.

[0027] During installation, when there are no elastic elements between the lid 7 and the lifting plate 1, the bottom of the lifting plate 1 contacts the top of the pressure sensor 6. When the goods are hooked onto the hook 14, the lifting plate 1 applies pressure to the pressure sensor 6. When there are several elastic elements between the lid 7 and the lifting plate 1, there is a certain gap between the bottom of the lifting plate 1 and the top of the pressure sensor 6. When the goods are hooked onto the hook 14, the lifting plate 1 can move downward to compress the spring 5 and contact the top of the pressure sensor 6, applying pressure to it and playing a buffering and protective role.

[0028] In use, pulley 2 works with the wire rope of the electric hoist to suspend the crane spreader. When the hook 14 hooks the goods, the goods will pull the spreader plate 1 downward through the hook 14. The spreader plate 1 contacts the top of the pressure sensor 6 and applies downward pressure to it. The pressure sensor 6 is used to detect the pressure from the spreader plate 1 and feeds the signal back to the controller 21. When the load is overloaded, the controller 21 controls the alarm 19 to work and issue a warning.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A crane lifting device with pressure warning function, comprising a lifting device plate, characterized in that: The lifting plate has assembly slots at both ends, and hooks are rotatably connected to the outer ends of the assembly slots. An assembly box is located below the lifting plate, and a pressure warning device is installed inside the assembly box. A box cover is detachably fixed to the top of the assembly box, and a first through hole is provided on the top of the box cover. The detection end of the pressure warning device extends to the outside of the first through hole. Several connecting rods are fixed on both sides of the bottom of the lifting plate. A second through hole corresponding to the connecting rod is provided on the box cover. The bottom of the connecting rod passes through the corresponding second through hole and is threaded with an assembly nut. An assembly frame is detachably fixed to the top of the box cover. The assembly frame passes through the assembly slot, and a pulley is rotatably connected to the top of the assembly frame.

2. The crane lifting device with pressure warning function as described in claim 1, characterized in that: An assembly block is fixed to the top of the hook, and assembly shafts are fixed to both sides of the assembly block; symmetrical sliders are detachably fixed in the assembly slot, and assembly holes are provided on the inner side of the sliders, with bearings that mate with the assembly shafts fixed in the assembly holes.

3. The crane lifting device with pressure warning function as described in claim 2, characterized in that: The side of the lifting plate is provided with a strip-shaped adjustment hole that communicates with the assembly slot. An adjustment screw is threaded to the outside of the slider, and the outer end of the adjustment screw extends to the corresponding adjustment hole and is threaded to an adjustment nut.

4. The crane lifting device with pressure warning function as described in claim 1, characterized in that: The pressure warning device includes a controller, a pressure sensor, an alarm, and a power supply that are detachably fixed in the assembly box. The pressure sensor, alarm, and power supply are electrically connected to the controller. The detection end of the pressure warning device is the top of the pressure sensor.

5. The crane lifting device with pressure warning function as described in claim 1, characterized in that: An assembly plate is fixed to the top edge of the assembly box. The assembly plate and the box cover are detachably and fixedly connected by assembly bolts. The assembly plate is also provided with a second through hole that mates with the connecting rod. The bottom of the connecting rod passes through the second through hole on the box cover and the second through hole on the assembly plate in sequence. The assembly nut is threaded with the connecting rod and is pressed against the bottom of the assembly plate.

6. The crane lifting device with pressure warning function as described in claim 1, characterized in that: Several elastic elements are provided between the box cover and the lifting plate. The number of elastic elements corresponds one-to-one with the number of connecting rods. The elastic elements are springs that are sleeved on the outside of the connecting rods.

7. The crane lifting device with pressure warning function as described in claim 1, characterized in that: The assembly frame includes a fixing plate, which is detachably fixed to the top of the box cover by screws. Symmetrical vertical plates are fixed on the fixing plate, and the two vertical plates pass through corresponding assembly slots. The pulley is rotatably connected between the two corresponding vertical plates.

8. The crane lifting device with pressure warning function as described in claim 1, characterized in that: The side of the assembly box has a third through hole, and the outer end of the alarm extends to the outside of the third through hole.

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