Anti-swing lifting appliance for portal crane

Abstract

The utility model discloses an anti-swing lifting appliance for a portal crane, which comprises a hook frame, the lower end of the hook frame is rotatably connected with a lifting hook, the upper end of the hook frame is connected with a lifting rope, the left side and the right side of the hook frame are respectively provided with a lifting assembly fixed on the portal crane, and a chain wheel and chain assembly is arranged between the upper parts of the lifting assemblies. Limiting ropes are connected to the left end and the right end of the hook frame, and the tail ends of the limiting ropes are connected with the rope wheel assemblies on the same side. The rope wheel is driven to rotate through the driving device, the rope wheel winds the limiting ropes, the two limiting ropes pull the lifting hook, the two limiting ropes are straightened, in the lifting process of the lifting hook, through cooperation of the double-shaft motor, the chain wheel and the chain, the two lead screws rotate synchronously, and therefore the guide block drives the rope wheel frame and the lifting hook to ascend and descend synchronously; therefore, the two limiting ropes are always in a straightened state, the hook frame is pulled by the two limiting ropes to prevent the lifting hook from swinging, and effective hoisting operation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry cranes, in particular to an anti-swaying hanger for gantry cranes. Background Art

[0002] Gantry crane is a variation of bridge crane, also called gantry crane, which is mainly used for loading and unloading operations in outdoor cargo yards, material yards and bulk cargo. Gantry crane has the characteristics of high site utilization, large operating range, wide adaptability and strong versatility, and is widely used in port cargo yards.

[0003] At present, when the lifting device of the gantry crane is in the lifting process, when the heavy object lifted by the lifting device swings, it is very easy to collide, causing serious collision accidents and economic losses, and affecting the effective implementation of the lifting operation. Utility Model Content

[0004] The utility model aims to overcome the defects of the prior art and to provide an anti-sway sling for a gantry crane, so as to solve the problems of uneven left, middle and right when adding medicine with multiple spray guns over long distances, different shapes of sprays from multiple spray guns, high failure rate when multiple spray guns are in action, and excessive amount of medicine at a certain position if one of the spray guns is not turned off.

[0005] To achieve the above purpose, the utility model provides an anti-sway hanger for a gantry crane, including a hook frame, a hook is rotatably connected to the lower end of the hook frame, a lifting rope is connected to the upper end of the hook frame, lifting components fixed to the gantry crane are provided on the left and right sides of the hook frame, a sprocket chain assembly is installed between the upper parts of the lifting components, a rope pulley assembly is installed at the end of the lifting components close to each other, and limiting ropes are connected to the left and right ends of the hook frame, and the end of the limiting rope is connected to the rope pulley assembly on the same side.

[0006] Preferably, the lifting assembly includes a vertical rail, a screw rod, and a guide block. The vertical rail is fixed to the gantry crane, the screw rod is rotatably connected inside the vertical rail, the guide block is slidably connected inside the vertical rail, and the screw rod passes through the guide block and is threadedly connected to the guide block.

[0007] Preferably, the sprocket chain assembly comprises a dual-axis motor, a sprocket, and a chain. The dual-axis motor is fixedly mounted on the inner upper end of one of the vertical rails, and the lower output shaft of the dual-axis motor is fixed to one of the lead screws.

[0008] Preferably, there is a pair of sprockets, which are located above the vertical rail in a one-to-one correspondence, the upper output shaft of the dual-axis motor is connected to one of the sprockets, the upper part of the other lead screw is connected to the other sprocket, and the chain is connected between the sprockets.

[0009] Preferably, the rope pulley assembly includes a rope pulley frame, a rotating shaft, a rope pulley and a driving device. The rope pulley frame is fixed to the guide block. The rotating shaft is rotatably connected to the inner side of the rope pulley frame. The rope pulley is fixed to the outside of the rotating shaft. The driving device is installed at the rear of the rope pulley frame. The driving device is connected to the rotating shaft. The end of the limiting rope is wound around the rope pulley.

[0010] Preferably, the driving device includes a worm and worm gear box, a driving motor, a worm, a shaft rod and a worm gear. The worm and worm gear box is fixed to the rope pulley frame. The shaft rod is connected by bearings inside the worm and worm gear box. The front part of the shaft rod is fixed to the rear part of the rotating shaft. The worm gear is fixed to the outside of the shaft rod. The driving motor is fixedly installed at one end of the worm and worm gear box. The output shaft of the driving motor is connected with a worm. The worm is located below the worm gear and is in transmission connection with the worm gear.

[0011] Preferably, fixed rings are fixed to both the left and right ends of the hook frame. A movable ring is fixed to the head end of the limiting rope. The movable ring is connected to the fixed ring.

[0012] The utility model provides an anti-swaying spreader for a gantry crane, which has the following beneficial effects: The driving device drives the rope pulley to rotate, so that the rope pulley winds up the limiting rope. In this way, the two limiting ropes pull the hook, making the two limiting ropes straight. During the lifting process of the hook, through the cooperation of the double-shaft motor, the sprockets and the chain, the two lead screws rotate synchronously, so that the guide block drives the rope pulley frame and the hook to lift and lower synchronously, so that the two limiting ropes are always in a straight state. In this way, the two limiting ropes pull the hook frame to prevent the hook from swaying and ensure the effective progress of the lifting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the whole of the utility model;

[0014] Figure 2 is the Figure 1 partial enlarged view A of the utility model;

[0015] Figure 3 is a schematic top sectional view of the driving device of the utility model.

[0016] In the figure: 1 - hook frame, 2 - hook, 3 - lifting rope, 4 - vertical rail, 5 - double-shaft motor, 6 - lead screw, 7 - guide block, 8 - rope pulley frame, 9 - rotating shaft, 10 - rope pulley, 11 - limiting rope, 12 - worm and worm gear box, 13 - sprocket, 14 - chain, 15 - fixed ring, 16 - movable ring, 17 - driving motor, 18 - worm, 19 - shaft rod, 20 - worm gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figures 1 - 3 , an anti-swaying spreader for a gantry crane, which includes a hook frame 1. A hook 2 is rotatably connected to the lower end of the hook frame 1. A lifting rope 3 is connected to the upper end of the hook frame 1. Lifting components fixed on the gantry crane are provided on both the left and right sides of the hook frame 1. The lifting components include vertical rails 4, lead screws 6, and guide blocks 7. The vertical rails 4 are fixed to the gantry crane. The lead screws 6 are rotatably connected inside the vertical rails 4. The guide blocks 7 are slidably connected inside the vertical rails 4. The lead screws 6 penetrate through the guide blocks 7 and are threadedly connected to the guide blocks 7. When the lead screws 6 rotate, with the threaded fit between the lead screws 6 and the guide blocks 7, the guide blocks 7 can move up or down inside the vertical rails 4.

[0019] A sprocket chain assembly is installed between the upper parts of the lifting components. The sprocket chain assembly includes a dual-shaft motor 5, sprockets 13, and a chain 14. The dual-shaft motor 5 is fixedly installed at the upper end inside one of the vertical rails 4. The lower output shaft of the dual-shaft motor 5 is fixed to one of the lead screws 6. There are a pair of sprockets 13, and the sprockets 13 are respectively located above the vertical rails 4. The upper output shaft of the dual-shaft motor 5 is connected to one of the sprockets 13. The upper part of the other lead screw 6 is connected to the other sprocket 13. The chain 14 is connected between the sprockets 13. The dual-shaft motor 5 is externally connected to a power source and a switch. By driving one of the lead screws 6 to rotate and one of the sprockets 13 to rotate through the dual-shaft motor 5, the sprocket 13 drives the other sprocket 13 to rotate synchronously through the chain 14, and the other sprocket 13 drives the other lead screw 6 to rotate, so as to make the two lead screws 6 rotate synchronously, thereby enabling the two guide blocks 7 to move up or down synchronously inside.

[0020] A rope pulley assembly is installed at one end of the lifting components close to each other. Limit ropes 11 are connected to both the left and right ends of the hook frame 1. Fixed rings 15 are fixed to both the left and right ends of the hook frame 1. A movable ring 16 is fixed to the head end of the limit rope 11. The movable ring 16 is connected to the fixed ring 15. The tail end of the limit rope 11 is connected to the rope pulley assembly on the same side. The rope pulley assembly includes a rope pulley frame 8, a rotating shaft 9, a rope pulley 10, and a driving device. The rope pulley frame 8 is fixed to the guide block 7. The rotating shaft 9 is rotatably connected to the inner side of the rope pulley frame 8. The rope pulley 10 is fixed to the outside of the rotating shaft 9. The driving device is installed at the rear of the rope pulley frame 8. The driving device is connected to the rotating shaft 9. The tail end of the limit rope 11 is wound around the rope pulley 10. By means of the driving device, the rotating shaft 9 can be driven to rotate. The rotating shaft 9 drives the rope pulley 10 to rotate. The rope pulley 10 can wind or unwind the limit rope 11. In this way, when the two limit ropes 11 are wound, the limit ropes 11 can pull the hook frame 1 and straighten it. Thus, by pulling the hook frame 1 with the two limit ropes 11, the swinging of the lifting hook 2 can be prevented, ensuring the effective progress of the lifting operation.

[0021] The driving device includes a worm and worm gear box 12, a driving motor 17, a worm 18, a shaft rod 19, and a worm gear 20. The worm and worm gear box 12 is fixed to the rope pulley frame 8. The shaft rod 19 is connected by bearings inside the worm and worm gear box 12. The front part of the shaft rod 19 is fixed to the rear part of the rotating shaft 9. The worm gear 20 is fixed to the outside of the shaft rod 19. The driving motor 17 is fixedly installed at one end of the worm and worm gear box 12. The output shaft of the driving motor 17 is connected to the worm 18. The worm 18 is located below the worm gear 20 and is in transmission connection with the worm gear 20. By means of the driving motor 17, the driving motor 17 is externally connected to a power source and a switch. The driving motor 17 can drive the worm 18 to rotate. The worm 18 drives the worm gear 20 to rotate. The worm gear 20 drives the shaft rod 19 to rotate. The shaft rod 19 drives the rotating shaft 9 to rotate, thereby enabling the rotating shaft 9 to drive the rope pulley 10 to rotate.

[0022] Working principle: Two driving motors 17 are externally connected to a controller, which is used to ensure that the two driving motors 17 start or stop synchronously. In this way, the driving motors 17 drive the worm 18 to rotate, the worm 18 drives the worm gear 20 to rotate, the worm gear 20 drives the shaft rod 19 to rotate, the shaft rod 19 drives the rotating shaft 9 to rotate, so that the rotating shaft 9 drives the rope pulley 10 to rotate, and the rope pulley 10 winds up the limit rope 11. When winding up the two limit ropes 11, the limit ropes 11 can pull the hook frame 1 and make it straight. In this way, by pulling the hook frame 1 with the two limit ropes 11, the swinging of the lifting hook 2 can be prevented. When the lifting rope 3 drives the lifting hook 2 to lift, through the double-shaft motor 5, the double-shaft motor 5 is externally connected to the motor controller of the gantry crane to ensure synchronous start and stop. The double-shaft motor 5 drives one of the lead screws 6 to rotate and one of the sprockets 13 to rotate. In this way, this sprocket 13 drives the other sprocket 13 to rotate synchronously through the chain 14, and the other sprocket 13 drives the other lead screw 6 to rotate, so as to make the two lead screws 6 rotate synchronously. When the lead screw 6 rotates, as the lead screw 6 is in threaded engagement with the guide block 7, the guide block 7 can move up or down inside the vertical rail 4. In this way, the guide block 7 drives the rope pulley frame 8 to move synchronously, so as to make the rope pulley frame 8 and the lifting hook 2 lift and lower synchronously, ensuring the effective progress of the lifting operation.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-sway lifting device for a gantry crane, comprising a hook frame (1), a hook (2) being rotatably connected to the lower end of the hook frame (1), and a lifting rope (3) being connected to the upper end of the hook frame (1), characterized in that: The hook frame (1) is provided with lifting assemblies fixed on the gantry crane on both left and right sides, a sprocket chain assembly is installed between the upper parts of the lifting assemblies, and a rope pulley assembly is installed at the ends of the lifting assemblies close to each other. The left and right ends of the hook frame (1) are connected to limit ropes (11), and the ends of the limit ropes (11) are connected to the rope pulley assembly on the same side.

2. The anti-sway hanger for a gantry crane according to claim 1, characterized in that: The lifting assembly comprises a vertical rail (4), a screw rod (6), and a guide block (7); the vertical rail (4) is fixed to the gantry crane; the screw rod (6) is rotatably connected inside the vertical rail (4); the guide block (7) is slidably connected inside the vertical rail (4); and the screw rod (6) passes through the guide block (7) and is threadedly connected to the guide block (7).

3. The anti-sway hanger for a gantry crane according to claim 2, characterized in that: The sprocket chain assembly comprises a double-shaft motor (5), a sprocket (13), and a chain (14); the double-shaft motor (5) is fixedly mounted on the upper end of one of the vertical rails (4); and the lower output shaft of the double-shaft motor (5) is fixed to one of the lead screws (6).

4. The anti-sway hanger for a gantry crane according to claim 3, characterized in that: There is a pair of sprocket wheels (13), and the sprocket wheels (13) are located above the vertical rail (4) in a one-to-one correspondence. The upper output shaft of the dual-axis motor (5) is connected to one of the sprocket wheels (13), and the upper part of the other lead screw (6) is connected to the other sprocket wheel (13). The chain (14) is connected between the sprocket wheels (13).

5. The anti-sway hanger for a gantry crane according to claim 2, characterized in that: The rope pulley assembly comprises a rope pulley frame (8), a rotating shaft (9), a rope pulley (10) and a driving device, wherein the rope pulley frame (8) is fixed to the guide block (7), the rotating shaft (9) is rotatably connected to the inner side of the rope pulley frame (8), the rope pulley (10) is fixed to the outer side of the rotating shaft (9), the driving device is installed at the rear of the rope pulley frame (8), the driving device is connected to the rotating shaft (9), and the end of the limiting rope (11) is wound around the rope pulley (10).

6. The anti-sway hanger for a gantry crane according to claim 5, characterized in that: The driving device comprises a worm gear box (12), a driving motor (17), a worm (18), a shaft (19), and a worm wheel (20); the worm gear box (12) is fixed to the rope pulley frame (8); a bearing of the shaft (19) is connected to the inside of the worm gear box (12); a front portion of the shaft (19) is fixed to the rear portion of the rotating shaft (9); the worm wheel (20) is fixed to the outside of the shaft (19); the driving motor (17) is fixedly mounted on one end of the worm gear box (12); an output shaft of the driving motor (17) is connected to the worm (18); the worm (18) is located below the worm wheel (20) and is drivingly connected to the worm wheel (20).

7. The anti-sway hanger for a gantry crane according to claim 1, characterized in that: The left and right ends of the hook frame (1) are both fixed with fixed rings (15), the head end of the limit rope (11) is fixed with a movable ring (16), and the movable ring (16) is connected to the fixed ring (15).

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