Anti-falling structure of portal crane

Abstract

The utility model discloses an anti-falling structure of a portal crane, which comprises a portal frame, a control chamber slidably connected to the upper end face of the portal frame, a hook arranged below the control chamber, a fixing frame fixedly connected to the lower end face of the control chamber, a positive and negative motor fixedly connected to the upper end face of the fixing frame, and a rotating shaft connected to the output end of the positive and negative motor. The outer wall of the rotating shaft is fixedly connected with a winding disc, the upper end face of the hook is fixedly connected with a suspension block, the upper end face of the suspension block is fixedly connected with a connecting base, the winding disc is driven by the rotating shaft to rotate, the hook is lifted, lock teeth and lock blocks on the outer wall of the rotating shaft are used, falling can be prevented, the lock teeth are clamped through the lock blocks, and the lock teeth are prevented from rotating reversely; and the movable frame can drive the locking block to move and be separated from the locking teeth, so that reverse rotation of the rotating shaft and descending of the hook are achieved, the hook can be effectively protected, fault falling is prevented, the limiting clamping block can limit a hoisting rope on the hook, unhooking is prevented, and the using safety of the crane is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a gantry crane anti-falling structure. Background Art

[0002] Gantry crane is a variation of bridge crane, mainly used for loading and unloading operations in outdoor cargo yards, material yards and bulk cargoes. It has the characteristics of high site utilization, large operating range, wide adaptability and strong versatility. It is widely used in port cargo yards. At the same time, in order to ensure the safety of crane use, it is necessary to provide anti-fall protection to improve the safety of crane use.

[0003] According to a gantry crane anti-fall structure disclosed in a Chinese patent document with the announcement number CN219885455U, it relates to the technical field related to cranes. The utility model includes a fixed component and a lifting component, and the lifting component is arranged on the lower surface of the fixed component; the fixed component includes a bridge, and the inner side of the bridge is movably connected with a control room; the lifting component includes a fixed plate fixed to the lower surface of the control room, and a suspension block is fixed at the center position of the lower surface of the fixed plate, and an electric hoist is respectively arranged on both sides of the suspension block, and the two electric hoists are fixedly connected to the fixed plate. The utility model solves the problem that the traditional gantry crane inevitably shakes during the lifting process, has the risk of unhooking, and has great safety hazards by arranging an electric hoist and a load-bearing plate that can assist in the consignment of goods. At the same time, through the traditional suspension block and the electric hoist plus the load-bearing plate double lifting device, its load-bearing capacity is greatly increased.

[0004] Based on the search of the above patents and in combination with the anti-fall structure of cranes in the prior art, it is found that the above anti-fall structure has been used to assist the consignment of goods through electric hoists and load-bearing plates to avoid unhooking. However, when in use, the load-bearing plate has a large trapezoidal shape and is used in conjunction with a wire rope, which will affect the lifting of the goods. The load-bearing plate needs to be contacted with the ground first, and the goods need to be moved onto the load-bearing plate, and then hoisted through the hook. The load-bearing plate cooperates with the electric hoist to assist in consignment, which increases the difficulty of lifting for the staff during use. Once a driving component such as an electric hoist or a motor fails, the hook and the load-bearing plate will fall vertically, causing great hidden dangers, thereby reducing practicality. Utility Model Content

[0005] The purpose of the utility model is to provide a gantry crane anti-falling structure, which can drive the collection winch to rotate through the rotating shaft through the action of the forward and reverse motors, so as to realize the lifting of the hook, and the use of the locking teeth and the locking blocks on the outer wall of the rotating shaft can prevent falling, and the locking teeth are clamped by the locking blocks to prevent the locking teeth from reversing, and the moving frame can move with the locking blocks and disengage from the locking teeth, so as to realize the reversal of the rotating shaft and lower the hook, which can effectively protect the hook and prevent it from falling in the event of a malfunction, and the limiting block can limit the lifting rope on the hook to prevent unhooking, thereby improving the safety of the crane.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gantry crane anti-fall structure, comprising a gantry, the upper end surface of the gantry is slidably connected to a control room, a hook is provided below the control room, the lower end surface of the control room is fixedly connected to a fixing frame, the upper end surface of the fixing frame is fixedly connected to a forward and reverse motor, the output end of the forward and reverse motor is connected to a rotating shaft, a retracting winch is fixedly connected to the outer wall of the rotating shaft, the upper end surface of the hook is fixedly connected to a suspension block, the upper end surface of the suspension block is fixedly connected to a connecting seat, the connecting seat is fixedly connected to a fixed pulley, the fixed pulley and the retracting winch are fixedly connected to the connecting seat, and the fixed pulley and the retracting winch are fixedly connected to the connecting seat. Two symmetrical steel wire ropes are provided between the capstans, the steel wire ropes are wound around a fixed pulley and are slidably connected to the fixed pulley, a locking tooth is provided between the retracting capstan and the forward and reverse motors, the locking tooth is fixedly connected to the rotating shaft, a locking block is clamped on the locking tooth, an end of the locking block away from the locking tooth is hinged with a positioning rod, both ends of the positioning rod are fixedly connected to a moving frame, the moving frame is slidably connected to the control room, connecting blocks are slidably connected to both sides of the suspension block, a limiting block is fixedly connected between the two connecting blocks, and the limiting block is movably connected to the hook.

[0007] The beneficial effects of the utility model are as follows: the rotation of the forward and reverse motor drives the collection winch on the rotating shaft to rotate, so as to realize the collection of the wire rope and the lifting of the goods on the hook. At the same time, the lock tooth rotates, so that the lock block is hinged with the positioning rod and slides on the outer edge of the lock tooth. The lock block is placed to reverse the lock tooth to prevent falling. The movement of the mobile frame can turn over the collection winch to realize the lowering of the hook, and the limit card block can limit the lifting rope connected to the hook to prevent it from being unhooked.

[0008] In order to prevent the hook from falling and unhooking, and ensure the stability of use;

[0009] As a further improvement of the above technical solution: a side of the mobile frame away from the locking block is fixedly connected to a hydraulic telescopic column, an end of the hydraulic telescopic column away from the mobile frame is fixedly connected to a fixed block, and the fixed block is fixedly connected to the control room.

[0010] The beneficial effect of this improvement is that by using the hydraulic telescopic column, the movement of the mobile frame can be controlled by the extension amount of the hydraulic telescopic column, thereby controlling the use position of the locking block and improving the flexibility of the use of the locking block;

[0011] In order to achieve flexible movement of the locking block;

[0012] As a further improvement of the above technical solution: a limiting groove is provided on the lower end surface of the control room, a limiting block is slidably connected in the limiting groove, and the limiting block is fixedly connected to the moving frame.

[0013] The beneficial effect of this improvement is that the movable frame can be limited by using the limit groove and the limit block, so as to ensure that the movable frame can be more stable during the movement without deviation and shaking;

[0014] In order to limit the position of the mobile rack and ensure the stability of the mobile rack;

[0015] As a further improvement of the above technical solution: a guide rod is slidably connected to the connecting block, and a retaining block is fixedly connected to the end of the guide rod away from the connecting block. The fixed block is fixedly connected to the suspension block, and a spring is sleeved on the outer surface of the guide rod, and both ends of the spring are fixedly connected to the connecting block and the retaining block respectively.

[0016] The beneficial effect of this improvement is that by using the retaining block, the guide rod and the spring, the connecting block can slide on the guide rod, which can facilitate the staff to push the limit block upward to achieve rapid limit of the hoisting rope and improve the flexibility of use;

[0017] In order to realize the flexible movement of the limit block, it can be automatically reset;

[0018] As a further improvement of the above technical solution: sliding grooves are provided on both sides of the suspension block, a sliding block is slidably connected in the sliding groove, and the sliding block is fixedly connected to the connecting block.

[0019] The beneficial effects of this improvement are: by using the slide groove and the slider, the connection block can be limited, ensuring that the connection block can be more stable during the movement, without the occurrence of offset rings, and can move the limit card block more stably, so that the limit card block and the hook can be stably docked;

[0020] In order to limit the connection block and ensure the stability of the connection block;

[0021] As a further improvement of the above technical solution: a card slot is provided on the limit card block.

[0022] The beneficial effects of this improvement are: by using the card slot, the limit card block can be better connected to the hook, preventing the limit card block from shaking left and right, and improving the stability of the connection between the limit card block and the hook;

[0023] In order to realize the limit block and ensure the stability of the connection with the hook;

[0024] As a further improvement of the above technical solution: a limit stopper is fixedly connected to the lower end surface of the movable frame, and the limit stopper is movably connected to the locking block.

[0025] The beneficial effects of this improvement are: by using the limit stopper, the lock block can be controlled to prevent the lock block from turning downward and failing to engage with the lock teeth, thereby improving the stability of the lock block;

[0026] In order to limit the locking block and ensure the stability of the locking block when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The isometric structure diagram provided by the utility model Figure 1 ;

[0028] Figure 2 The isometric structure diagram provided by the utility model Figure 2 ;

[0029] Figure 3 A front view provided for the utility model;

[0030] Figure 4 The utility model provides Figure 3 The three-dimensional cross-section view at AA in the middle;

[0031] Figure 5 The utility model provides Figure 4 The enlarged view of point A in the middle;

[0032] Figure 6 A right side view provided for the utility model;

[0033] Figure 7 The utility model provides Figure 6 A three-dimensional cross-section view at the middle BB;

[0034] Figure 8 The utility model provides Figure 7 Enlarged view of point B in the middle.

[0035] In the figure, 1, gantry; 11, control room; 12, hook; 13, fixed frame; 14, forward and reverse motors; 15, rotating shaft; 16, retracting winch; 17, suspension block; 18, connecting seat; 19, fixed pulley; 20, wire rope; 21, locking tooth; 22, locking block; 23, positioning rod; 24, moving frame; 25, connecting block; 26, limit card block; 31, hydraulic telescopic column; 32, fixed block; 41, limit slot; 42, limit block; 51, guide rod; 52, retaining block; 53, spring; 61, slide slot; 62, slider; 71, card slot; 81, limit block. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0037] like Figures 1 to 8As shown, an anti-fall structure of a gantry crane provided by an embodiment of the utility model comprises a gantry 1, an upper end surface of the gantry 1 is slidably connected to a control room 11, a hook 12 is arranged below the control room 11, a fixing frame 13 is fixedly connected to the lower end surface of the control room 11, a forward and reverse motor 14 is fixedly connected to the upper end surface of the fixing frame 13, the forward and reverse motor 14 can be fixed by the fixing frame 13 to ensure the stable output of the forward and reverse motor 14, a rotating shaft 15 is connected to the output end of the forward and reverse motor 14, a collecting winch 16 is fixedly connected to the outer wall of the rotating shaft 15, a suspension block 17 is fixedly connected to the upper end surface of the hook 12, a connecting seat 18 is fixedly connected to the upper end surface of the suspension block 17, a fixed pulley 19 is fixedly connected to the connecting seat 18, and a fixed pulley 19 and the collecting winch 16 are commonly provided between the fixed pulley 19 and the collecting winch 16. There are two symmetrical steel wire ropes 20. The operation of the forward and reverse motors 14 causes the rotating shaft 15 to drive the collecting capstan 16 to rotate, and the two steel wire ropes 20 are raised, so that the hook 12 can lift the cargo. The steel wire ropes 20 are wound around the fixed pulley 19 and are slidably connected to the fixed pulley 19. A locking tooth 21 is provided between the collecting capstan 16 and the forward and reverse motors 14. The locking tooth 21 is fixedly connected to the rotating shaft 15. A locking block 22 is clamped on the locking tooth 21. The locking tooth 21 can rotate with the rotating shaft 15, so that the locking block 22 slides on the outer edge of the locking tooth 21, and at the same time prevents the locking tooth 21 from reversing and falling. A positioning rod 23 is hinged at one end of the locking block 22 away from the locking tooth 21. A moving frame 24 is fixedly connected to both ends of the positioning rod 23. The moving frame 24 is slidably connected to the control room 11 to suspend the cargo. Both sides of the block 17 are slidably connected with connecting blocks 25, and the two connecting blocks 25 are commonly fixedly connected with a limit block 26, which is movably connected to the hook 12, and the limit block 26 can be engaged with the hook 12 to limit the lifting rope and prevent the danger of unhooking. The side of the mobile frame 24 away from the locking block 22 is fixedly connected with a hydraulic telescopic column 31, and the end of the hydraulic telescopic column 31 away from the mobile frame 24 is fixedly connected with a fixed block 32, and the fixed block 32 is fixedly connected to the control room 11. The use of the hydraulic telescopic column 31 can flexibly move the mobile frame 24, thereby controlling the use position of the locking block 22, realizing the reverse unlocking of the lock tooth 21, and facilitating the lowering of the hook 12. A limit groove 41 is provided on the lower end surface of the control room 11 The limiting block 42 is slidably connected in the limiting groove 41, and the limiting block 42 is fixedly connected to the moving frame 24. The use of the limiting groove 41 and the limiting block 42 can limit the moving frame 24 to ensure that the moving frame 24 can be more stable during the movement. A guide rod 51 is slidably connected to the connecting block 25, and a retaining block 52 is fixedly connected to the end of the guide rod 51 away from the connecting block 25. The fixed block 32 is fixedly connected to the suspension block 17. A spring 53 is sleeved on the outer surface of the guide rod 51, and the two ends of the spring 53 are respectively fixedly connected to the connecting block 25 and the retaining block 52. By using two springs 53 and two guide rods 51, the corresponding connecting blocks 25 can be limited to ensure that the connecting block 25 can automatically reset while moving up and down.The convenience is that the limit block 26 can be flexibly connected with the hook 12. Slide grooves 61 are provided on both sides of the suspension block 17. Slide blocks 62 are slidably connected in the slide grooves 61. The slide blocks 62 are fixedly connected with the connection block 25. The use of the two slide grooves 61 and the two slide blocks 62 can limit the corresponding connection blocks 25 to ensure the stability of the connection block 25 moving up and down. The limit block 26 is provided with a card slot 71. The card slot 71 can make the hook 12 and the limit block 26 fit together to prevent the limit block 26 from shaking and tilting. The lower end surface of the movable frame 24 is fixedly connected with a limit block 81. The limit block 81 is movably connected with the lock block 22. Through the use of the limit block 81, the lock block 22 can be prevented from turning downward and failing to effectively connect with the lock tooth 21, thereby ensuring the stability of the use of the lock block 22.

[0038] The working principle and use process of the utility model are as follows: when in use, first, the hydraulic telescopic column 31 is contracted to make the movable frame 24 drive the locking block 22 away from the locking tooth 21, and the forward and reverse motor 14 is reversed to make the retracting winch 16 lower the hook 12 through the two steel wires 20, and the two connecting blocks 25 are moved upward to squeeze the corresponding springs 53 to achieve the separation of the limit block 26 from the hook 12, and the rope of the object to be hoisted is connected to the hook 12, and the two connecting blocks 25 are released, and the spring 53 rebounds to make the limit block 26 separate from the hook 12. The positioning block 26 is re-engaged in the hook 12 to prevent it from being unhooked. Then, the hydraulic telescopic column 31 is extended again, and the locking block 22 on the movable frame 24 is engaged with the locking tooth 21. The forward and reverse motor 14 starts to rotate forward, and the wire rope 20 is retracted by the winding winch 16 to lift the material. During the rotation of the rotating shaft 15, the locking tooth 21 rotates accordingly, and the locking block 22 is frequently hinged with the positioning rod 23, so that the locking block 22 slides on the outer edge of the locking tooth 21 to prevent the locking tooth 21 from reversing and falling, thereby realizing the use process of the entire crane anti-fall structure.

[0039] The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gantry crane anti-fall structure, comprising a gantry (1), characterized in that: The upper end surface of the gantry (1) is slidably connected to a control room (11), a hook (12) is provided below the control room (11), the lower end surface of the control room (11) is fixedly connected to a fixing frame (13), the upper end surface of the fixing frame (13) is fixedly connected to a forward and reverse motor (14), the output end of the forward and reverse motor (14) is connected to a rotating shaft (15), and a retracting winch (16) is fixedly connected to the outer wall of the rotating shaft (15); The upper end surface of the hook (12) is fixedly connected to a suspension block (17), the upper end surface of the suspension block (17) is fixedly connected to a connecting seat (18), the connecting seat (18) is fixedly connected to a fixed pulley (19), two symmetrical steel wire ropes (20) are provided between the fixed pulley (19) and the winding capstan (16), the steel wire ropes (20) are wound around the fixed pulley (19) and are slidably connected to the fixed pulley (19), a locking tooth (21) is provided between the winding capstan (16) and the forward and reverse motors (14), and the locking tooth (21) is connected to the rotating shaft (15) is fixedly connected, a locking block (22) is clamped on the locking tooth (21), a positioning rod (23) is hinged at one end of the locking block (22) away from the locking tooth (21), a moving frame (24) is fixedly connected at both ends of the positioning rod (23), the moving frame (24) is slidably connected to the control room (11), connecting blocks (25) are slidably connected on both sides of the suspension block (17), a limiting block (26) is fixedly connected between the two connecting blocks (25), and the limiting block (26) is movably connected to the hook (12).

2. The anti-falling structure of a gantry crane according to claim 1, characterized in that: A hydraulic telescopic column (31) is fixedly connected to one side of the movable frame (24) away from the locking block (22); an end of the hydraulic telescopic column (31) away from the movable frame (24) is fixedly connected to a fixed block (32); and the fixed block (32) is fixedly connected to the control room (11).

3. The anti-falling structure of a gantry crane according to claim 1, characterized in that: A limiting groove (41) is provided on the lower end surface of the control room (11), a limiting block (42) is slidably connected in the limiting groove (41), and the limiting block (42) is fixedly connected to the moving frame (24).

4. The anti-falling structure of a gantry crane according to claim 2, characterized in that: A guide rod (51) is slidably connected to the connecting block (25); one end of the guide rod (51) away from the connecting block (25) is fixedly connected to a retaining block (52); the fixed block (32) is fixedly connected to the suspension block (17); a spring (53) is sleeved on the outer surface of the guide rod (51); two ends of the spring (53) are respectively fixedly connected to the connecting block (25) and the retaining block (52).

5. The anti-falling structure of a gantry crane according to claim 1, characterized in that: Slide grooves (61) are provided on both sides of the suspension block (17), a sliding block (62) is slidably connected in the sliding groove (61), and the sliding block (62) is fixedly connected to the connection block (25).

6. The anti-falling structure of a gantry crane according to claim 1, characterized in that: The limit card block (26) is provided with a card slot (71).

7. The anti-falling structure of a gantry crane according to claim 1, characterized in that: The lower end surface of the movable frame (24) is fixedly connected to a limit stopper (81), and the limit stopper (81) is movably connected to the locking block (22).

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