Gantry crane with hook

Abstract

The present invention discloses a gantry crane with a hook, comprising a bridge, a lifting trolley arranged on the bridge, a rope winding machine arranged on the lifting trolley, a rope wound on the rope winding machine connected to a drooping hook, a telescopic spring and a linear telescopic device arranged between the hook and the lifting trolley, the rope is located at the center of the telescopic spring and the linear telescopic device, the linear telescopic device comprises a fixed part and a telescopic movable part, the top of the telescopic spring is connected to the lifting trolley, the bottom of the telescopic spring is fixedly connected to the fixed part, the telescopic movable part is movably connected to the fixed part and extends into the telescopic spring, and the hook is connected to the bottom of the telescopic movable part. When lifting goods and the wind blows the goods, the telescopic spring cooperates with the linear telescopic device to straighten the rope and the hook, reduce or avoid the swing of the goods, and improve the safety of the operation.

Description

Technical Field

[0001] The invention relates to lifting equipment, in particular to a gantry crane. Background Art

[0002] A gantry crane, also known as a portal crane, is a bridge-type crane whose bridge is supported on ground tracks by legs on both sides. The gantry crane's hoisting trolley runs on the bridge. The trolley is equipped with a hook for lifting cargo. The hook is connected to a rope, and the rope is connected to the rope winder of the hoisting trolley. Since gantry cranes generally operate outdoors, the lifted cargo is subject to a large area of ​​wind force. During the lifting process, the cargo will swing under the action of wind force, affecting the stability of the gantry crane and easily leading to safety accidents. Summary of the invention

[0003] The technical problem solved by the present invention is that when a gantry crane is operated outdoors, the lifted cargo is swung by wind, which affects the stability of the gantry crane and easily leads to safety accidents.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a gantry crane with a hook portion, comprising a bridge frame and a lifting trolley arranged on the bridge frame, the lifting trolley is provided with a rope winding machine, the rope wound on the rope winding machine is connected to the hanging hook portion, a telescopic spring and a linear telescopic device are provided between the hook portion and the lifting trolley, the rope is located at the center position of the telescopic spring and the linear telescopic device, the linear telescopic device comprises a fixed part and a telescopic movable part, the top of the telescopic spring is connected to the lifting trolley, the bottom of the telescopic spring is fixedly connected to the fixed part, the telescopic movable part is movably connected to the fixed part and extends into the telescopic spring, and the hook portion is connected to the bottom of the telescopic movable part.

[0005] The rope winder releases the rope, and under the action of gravity, the hook descends, the telescopic spring stretches, and the telescopic movable part descends relative to the fixed part. The worker pulls down the hook, the telescopic spring is stretched, and the worker hooks the hook onto the cargo and releases the hook. Under the action of the telescopic spring, the hook rises and hooks the cargo. In this way, under the premise that the hook stably hooks the cargo, the rope winder of the lifting trolley is started, the rope is tightened, and the hook lifts the cargo.

[0006] The rope winder continues to tighten the rope, the hook continues to rise, the cargo rises, the telescopic movable part rises relative to the fixed part, and the telescopic movable part extends into the telescopic spring. After the telescopic movable part rises to the limit position relative to the fixed part, the rope winder continues to tighten the rope, the hook continues to rise, and the telescopic spring is compressed. The rise of the telescopic movable part relative to the fixed part is the first stage of the cargo rising, and after the telescopic movable part rises to the limit position relative to the fixed part, the hook continues to rise and the telescopic spring is compressed as the second stage of the cargo rising.

[0007] In the first and second stages of the cargo rising, since the top of the telescopic spring is connected to the lifting trolley, the bottom of the telescopic spring is fixedly connected to the fixed part, and the hook is connected to the bottom of the telescopic movable part, when the wind blows the cargo, the telescopic spring cooperates with the linear telescopic device to straighten the rope and the hook, thereby reducing or avoiding the swinging of the cargo.

[0008] The present invention does not use a single telescopic spring between the hook and the lifting trolley, because with a single telescopic spring, the lifting amplitude of the hook is equal to the telescopic amplitude of the telescopic spring, which will result in that when the hook is unloaded, the gravity on the unloaded hook is difficult to pull down the stretched telescopic spring, and the hook is difficult to smoothly descend. Moreover, the worker needs to use a large pulling force to overcome the elastic force of the stretched telescopic spring to make it continue to stretch and pull down the hook, and it is even difficult to pull down the hook.

[0009] The present invention does not use a single linear telescopic device between the hook and the lifting trolley, because the single linear telescopic device is highly rigid and not easy to deform elastically. When the hook lifts the cargo off the ground, the center of gravity of the cargo moves, which will inevitably cause the hook and the rope to shake, and this shaking will break the rigid linear telescopic device.

[0010] The present invention adopts a technical solution combining a telescopic spring with a linear telescopic device. When the hook lifts the cargo, the hook and the cargo are allowed to sway to a certain extent, and this sway is absorbed by the telescopic spring. During the lifting process of the cargo, the combination of the telescopic spring and the linear telescopic device can effectively prevent the hook and the cargo from swinging.

[0011] The present invention adopts a technical solution combining a telescopic spring and a linear telescopic device. When the hook is unloaded, the unloaded hook descends, and after the telescopic spring is no longer extended, the linear telescopic device extends, that is, the telescopic movable part descends relative to the fixed part, ensuring that the hook descends smoothly. When the hook rises, the linear telescopic device contracts, that is, the telescopic movable part rises relative to the fixed part, and then the telescopic spring is compressed.

[0012] The present invention adopts a technical solution combining a telescopic spring with a linear telescopic device, which increases the lifting range of the hook compared to a single telescopic spring.

[0013] The fixed part is a disc-shaped part, which is embedded in the telescopic spring and welded to the bottom of the telescopic spring. The top of the telescopic spring can be hooked in the hole of the lifting trolley, or directly welded to the lifting trolley to achieve a fixed connection between the top of the telescopic spring and the lifting trolley.

[0014] The fixed part is provided with a plurality of guide holes, the telescopic movable part comprises a movable part base, a plurality of guide rods fixed on the movable part base, the plurality of guide rods cooperate with the plurality of guide holes in a one-to-one manner, and the hook part is connected to the movable part base.

[0015] The movable part base includes a disc-shaped upper part and a disc-shaped lower part, the disc-shaped lower part and the disc-shaped upper part are pivotally connected through a bearing, the guide rod is fixedly connected to the disc-shaped upper part, and the hook is fixedly connected to the disc-shaped lower part. In this way, the hook and the disc-shaped lower part can rotate relative to the disc-shaped upper part. In actual operation, the hook needs to adjust its position to hook the rope binding the goods, and the hook can rotate, which provides convenience for the hook to hook the rope binding the goods.

[0016] The hook part includes a cylindrical connecting part and a hook fixedly connected to the cylindrical connecting part, and a connecting ring is provided on the cylindrical connecting part; the disc-shaped lower part and the disc-shaped upper part are both provided with a central hole, the cylindrical connecting part fits in the central hole of the disc-shaped lower part and the disc-shaped upper part, the connecting ring is fixedly connected to the bottom surface of the disc-shaped lower part, and the disc-shaped upper part is provided with a connecting buckle connected to a rope. Among them, the cylindrical connecting part and the central hole of the disc-shaped upper part are gap-fitted, and the cylindrical connecting part can rotate in the central hole of the disc-shaped upper part. The rope connected to the connecting buckle passes upward through the central hole of the fixed part and is connected to the rope winder of the lifting trolley. The connecting ring is fixedly connected to the disc-shaped lower part by bolts.

[0017] The hook is bat-shaped and is fixedly connected to the cylindrical connecting part through a middle connecting rod. The circular binding rope passes through the bottom of the cargo and is hooked on the hook at both ends. In this way, not only is the force on the hook balanced, but the cargo can also be stably lifted.

[0018] The top of the guide rod is fixedly connected with a disc-shaped reinforcement, and the edge of the disc-shaped reinforcement is provided with a plurality of cylindrical rollers, which are distributed along the circumference of the disc-shaped reinforcement. The cylindrical rollers abut against the inner side of the telescopic spring, which can reduce or avoid the swing of the linear telescopic device relative to the telescopic spring, thereby reducing or avoiding the swing of the goods. When the telescopic movable part is raised or lowered relative to the fixed part, the cylindrical rollers roll along the inner side of the telescopic spring, so that the telescopic movable part can move smoothly relative to the fixed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 is a schematic diagram of a gantry crane provided with a hook;

[0021] Figure 2 A top view of a gantry crane provided with a hook;

[0022] Figure 3 It is a schematic diagram of the combined structure of the telescopic spring 40 and the linear telescopic device 50;

[0023] Figure 4is a schematic diagram of the combined structure of the telescopic spring 40 and the linear telescopic device 50 from another perspective;

[0024] Figure 5 is a schematic diagram of a linear telescopic device 50;

[0025] Figure 6 is a schematic diagram of the linear telescopic device 50 from another perspective;

[0026] Figure 7 is a schematic diagram of the hook portion 30;

[0027] Figure 8 for Figure 3 A schematic diagram of the linear telescopic device 50 when it is contracted;

[0028] Fig. 9 for Figure 3 Schematic diagram of the central linear telescopic device 50 when extended.

[0029] Explanation of symbols in the figure:

[0030] 10. Bridge; 11. Sprocket; 12. Transmission chain;

[0031] 20. Lifting trolley; 21. Rope;

[0032] 30. hook portion; 31. cylindrical connecting portion; 32. hook; 33. connecting ring; 34. middle connecting rod;

[0033] 40. Telescopic spring;

[0034] 50. Linear telescopic device; 51. Fixed part; 52. Telescopic movable part; 53. Movable part base; 531. Disc-shaped upper part; 532. Disc-shaped lower part; 533. Connecting buckle; 54. Guide rod; 55. Disc-shaped reinforcement; 56. Cylindrical roller. DETAILED DESCRIPTION

[0035] Combination Figures 1 to 3 ,as well as Figure 5 A gantry crane with a hook portion comprises a bridge 10 and a lifting trolley 20 arranged on the bridge. The lifting trolley is provided with a rope winder. The rope 21 wound on the rope winder is connected to the drooping hook 30. A telescopic spring 40 and a linear telescopic device 50 are provided between the hook and the lifting trolley. The rope is located at the center of the telescopic spring and the linear telescopic device. The linear telescopic device comprises a fixed part 51 and a telescopic movable part 52. The top of the telescopic spring is connected to the lifting trolley, the bottom of the telescopic spring is fixedly connected to the fixed part, the telescopic movable part is movably connected to the fixed part and extends into the telescopic spring. The hook 30 is connected to the bottom of the telescopic movable part 52.

[0036] Rope winder releases rope 21, ref. Fig. 9 , under the action of gravity, the hook 30 descends, the telescopic spring 40 stretches, and the telescopic movable part 52 descends relative to the fixed part 51. The worker pulls down the hook 30, the telescopic spring is stretched, the worker hooks the hook 30 on the cargo and releases the hook. Under the action of the telescopic spring 40, the hook 30 rises and hooks the cargo. In this way, under the premise that the hook stably hooks the cargo, the rope winding machine of the lifting trolley 20 is started, the rope 21 is tightened, and the hook 30 lifts the cargo.

[0037] The rope winder continues to tighten the rope, the hook 30 continues to rise, the cargo rises, the telescopic movable part 52 rises relative to the fixed part 51, and the telescopic movable part 52 extends into the telescopic spring 40. Figure 8 After the telescopic movable part 52 rises to the limit position relative to the fixed part 51, the rope winding machine continues to tighten the rope 21, the hook 30 continues to rise, and the telescopic spring 40 is compressed. In which, the telescopic movable part 52 rises relative to the fixed part 51 as the first stage of the goods rising, and after the telescopic movable part 52 rises to the limit position relative to the fixed part 51, the hook 30 continues to rise, and the telescopic spring 40 is compressed as the second stage of the goods rising.

[0038] In the first and second stages of the cargo rising, since the top of the telescopic spring 40 is connected to the lifting trolley 20, the bottom of the telescopic spring is fixedly connected to the fixed part 51, and the hook 30 is connected to the bottom of the telescopic movable part 52, when the wind blows the cargo, the telescopic spring cooperates with the linear telescopic device 50 to straighten the rope 21 and the hook 30, thereby reducing or avoiding the swinging of the cargo.

[0039] The present invention does not use a single telescopic spring 40 between the hook 30 and the lifting trolley 20, because with a single telescopic spring, the lifting range of the hook 30 is equal to the telescopic range of the telescopic spring, which will result in that when the hook 30 is unloaded, the gravity of the unloaded hook is difficult to pull down the stretched telescopic spring 40, and the hook is difficult to smoothly descend. Moreover, the worker needs to use a large pulling force to overcome the elastic force of the stretched telescopic spring to make it continue to stretch and pull down the hook, and it is even difficult to pull down the hook 30.

[0040] The present invention does not use a single linear telescopic device 50 between the hook 30 and the lifting trolley 20, because a single linear telescopic device is highly rigid and not easily elastically deformed. When the hook 30 lifts the cargo off the ground, the center of gravity of the cargo moves, which inevitably causes the hook and the rope 21 to shake, and this shaking will break the rigid linear telescopic device 50.

[0041] The present invention adopts a technical solution combining a telescopic spring 40 with a linear telescopic device 50. When the hook 30 lifts the cargo, the hook and the cargo are allowed to sway to a certain extent, and this sway is absorbed by the telescopic spring 40. During the lifting process of the cargo, the combination of the telescopic spring 40 and the linear telescopic device 50 can effectively prevent the hook 30 and the cargo from swinging.

[0042] The present invention adopts a technical solution combining a telescopic spring 40 with a linear telescopic device 50. When the hook 30 is unloaded, the unloaded hook descends, and after the telescopic spring 40 is no longer extended, the linear telescopic device 50 extends, that is, the telescopic movable part 52 descends relative to the fixed part 51, ensuring that the hook descends smoothly. When the hook rises, the linear telescopic device 50 contracts, that is, the telescopic movable part 52 rises relative to the fixed part 51, and then the telescopic spring 40 is compressed.

[0043] The present invention adopts a technical solution of combining a telescopic spring 40 with a linear telescopic device 50 , which increases the lifting range of the hook compared to a single telescopic spring.

[0044] Combination Figure 3 , Figure 5 The fixed part 51 is a disc-shaped part, which is embedded in the telescopic spring 40 and welded to the bottom of the telescopic spring. The top of the telescopic spring can be hooked in the hole of the lifting trolley 20, or it can be directly welded to the lifting trolley to achieve a fixed connection between the top of the telescopic spring 40 and the lifting trolley 20.

[0045] The fixed part 51 is provided with a plurality of guide holes, the telescopic movable part 52 comprises a movable part base 53, a plurality of guide rods 54 fixed on the movable part base, the plurality of guide rods and the plurality of guide holes are matched in a one-to-one manner, and the hook 30 is connected to the movable part base.

[0046] like Figure 5 The movable part base 53 includes a disc-shaped upper part 531 and a disc-shaped lower part 532, the disc-shaped lower part and the disc-shaped upper part are pivotally connected together through a bearing, the guide rod 54 is fixedly connected to the disc-shaped upper part, and the hook 30 is fixedly connected to the disc-shaped lower part. In this way, the hook 30 and the disc-shaped lower part 532 can rotate relative to the disc-shaped upper part 531. In actual operation, the hook 30 needs to adjust its position to hook the rope binding the goods, and the hook can rotate, which provides convenience for the hook 30 to hook the rope binding the goods.

[0047] Combination Figure 3 , Figure 5The hook part 30 includes a cylindrical connecting part 31, a hook 32 fixedly connected to the cylindrical connecting part, and a connecting ring 33 is provided on the cylindrical connecting part; the disc-shaped lower part 532 and the disc-shaped upper part 531 are both provided with a central hole, the cylindrical connecting part is matched in the central hole of the disc-shaped lower part and the disc-shaped upper part, the connecting ring is fixedly connected to the bottom surface of the disc-shaped lower part, and the disc-shaped upper part is provided with a connecting buckle 533 connected to the rope 21. Among them, the cylindrical connecting part 31 and the central hole of the disc-shaped upper part 531 are matched with each other, and the cylindrical connecting part 31 can rotate in the central hole of the disc-shaped upper part 531. The rope 21 connected to the connecting buckle 533 passes upward through the central hole of the fixed part 51 and is connected to the rope winding machine of the lifting trolley 20. The connecting ring 33 is fixedly connected to the disc-shaped lower part 532 by bolts.

[0048] like Figure 3 , Figure 7 The hook 32 is bat-shaped and is fixedly connected to the cylindrical connecting part 31 through the middle connecting rod 34. The annular binding rope passes through the bottom of the goods, and the two ends are hooked on the hook 32 respectively. In this way, not only the hook is balanced in force, but also the goods can be stably lifted.

[0049] like Figure 5 The top of the guide rod 54 is fixedly connected with a disc-shaped reinforcement 55, and the edge of the disc-shaped reinforcement is provided with a plurality of cylindrical rollers 56, which are distributed along the circumference of the disc-shaped reinforcement. The cylindrical rollers abut against the inner side of the telescopic spring 40, which can reduce or avoid the swing of the linear telescopic device 50 relative to the telescopic spring 40, thereby reducing or avoiding the swing of the goods. When the telescopic movable part 52 is raised or lowered relative to the fixed part 51, the cylindrical rollers 56 roll along the inner side of the telescopic spring 40, so that the telescopic movable part 52 can move smoothly relative to the fixed part 51.

[0050] refer to Figure 1 , Figure 2 As an option, the lifting trolley 20 is provided with rollers, and moves directly on the bridge frame 10 under the drive of the motor, or, sprockets 11 are provided at the four corners of the bridge frame 10, one of the sprockets is driven by the motor, and a transmission chain 12 cooperating with the sprocket is connected to the lifting trolley 20, and the lifting trolley moves on the bridge frame 10 under the drive of the transmission chain and the guidance of the guide rail.

[0051] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A gantry crane with a hook, comprising a bridge (10), a trolley (20) arranged on the bridge, a rope winder being arranged on the trolley, a rope (21) wound on the rope winder being connected to a hanging hook (30), characterized in that: A telescopic spring (40) and a linear telescopic device (50) are provided between the hook and the lifting trolley, the rope is located at the center of the telescopic spring and the linear telescopic device, the linear telescopic device comprises a fixed part (51) and a telescopic movable part (52), the top of the telescopic spring is connected to the lifting trolley, the bottom of the telescopic spring is fixedly connected to the fixed part, the telescopic movable part is movably connected to the fixed part and extends into the telescopic spring, and the hook (30) is connected to the bottom of the telescopic movable part (52); The fixed part (51) is provided with a plurality of guide holes, the telescopic movable part (52) comprises a movable part base (53), a plurality of guide rods (54) fixed on the movable part base, the plurality of guide rods and the plurality of guide holes are matched in a one-to-one manner, and the hook part (30) is connected to the movable part base.

2. The gantry crane with a hook as claimed in claim 1, characterized in that: The movable part base (53) comprises a disc-shaped upper part (531) and a disc-shaped lower part (532), wherein the disc-shaped lower part and the disc-shaped upper part are pivotally connected via a bearing, the guide rod (54) is fixedly connected to the disc-shaped upper part, and the hook (30) is fixedly connected to the disc-shaped lower part.

3. The gantry crane with a hook as claimed in claim 2, characterized in that: The hook portion (30) comprises a cylindrical connecting portion (31) and a hook (32) fixedly connected to the cylindrical connecting portion, and a connecting ring (33) is provided on the cylindrical connecting portion; the disc-shaped lower half (532) and the disc-shaped upper half (531) are both provided with a central hole, the cylindrical connecting portion fits in the central hole of the disc-shaped lower half and the disc-shaped upper half, the connecting ring is fixedly connected to the bottom surface of the disc-shaped lower half, and the disc-shaped upper half is provided with a connecting buckle (533) connected to the rope (21).

4. The gantry crane with a hook as claimed in claim 3, characterized in that: The hook (32) is bat-shaped and is fixedly connected to the cylindrical connecting portion (31) via a middle connecting rod (34).

5. The gantry crane with a hook as claimed in claim 1, characterized in that: The top end of the guide rod (54) is fixedly connected with a disc-shaped reinforcement member (55), and the edge of the disc-shaped reinforcement member is provided with a plurality of cylindrical rollers (56), which are distributed along the circumference of the disc-shaped reinforcement member, and the cylindrical rollers abut against the inner side of the telescopic spring (40).

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