Protective device of crane

Abstract

The utility model discloses a protective device of a crane, which comprises a crane body, the top end of the crane body is fixedly provided with a cargo boom, the top end of the cargo boom is provided with a lifting cable, one section of the lifting cable is fixedly provided with a lifting hook, the top end of the crane body is fixedly provided with two support plates, and the two support plates are fixedly arranged on the crane body. And a connecting plate is fixedly mounted between the two supporting plates. The two moving frames are moved to the middle through the adjusting assembly, in the process that the moving frames move to the middle, the gears on the lower portions rotate under the action of the toothed plates, the gears rotate to drive the winding rollers to rotate, the winding rollers on the two sides lower the connecting rope at the same time, and therefore the limiting ring moves downwards along with the lifting hook; the lifting hook, the lifting cable above the lifting hook and goods below the lifting hook can be limited by the limiting ring, and the periphery can be limited by the limiting ring, so that the lifting hook and the goods can stably ascend and cannot shake in a large range.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a protective device for cranes. Background Art

[0002] Crane is a heavy mechanical equipment used for vertically lifting and horizontally moving heavy objects within a certain range. It achieves the lifting and moving of heavy objects through lifting mechanism, running mechanism, luffing mechanism and slewing mechanism. It is widely used in construction, manufacturing, mining, aviation, shipping, logistics and other industries. It is an indispensable and important equipment in modern industry and transportation.

[0003] In the process of lifting cargo, due to the limitation of current technology, there is no special protective mechanism to effectively control the stability of the hook and cargo. This situation may cause the hook and cargo to swing uncontrollably during the lifting process. This swing may not only hit the people or nearby buildings, posing a safety hazard, but also cause an unexpected impact on the crane body, thus affecting the structural stability and life of the crane. What's more serious is that if the swing amplitude is too large or the lifting rope is loose, it may even cause the cargo to fall from a high altitude, which will not only damage the cargo itself, but also pose a serious threat to people and property on the ground.

[0004] Patent document CN103010983B discloses a crane protection device and a crane, wherein the crane protection device includes a telescopic mechanism and a protection block, wherein one end of the telescopic mechanism is mounted on the frame of the crane, and the other end of the telescopic mechanism is connected to the protection block, and the telescopic mechanism can drive the protection block to move so that the protection block contacts the side of the heavy object lifted by the crane. The technical solution provided by the present invention drives the protection block to move and support the heavy object through the telescopic mechanism, thereby preventing the heavy object from swinging back and forth in the driving direction of the off-road crane, protecting the frame from the impact and wear of the heavy object, and improving the structural stability of the frame and the operating stability of the crane; at the same time, it reduces the impact and fatigue damage to the wire rope and pulley caused by the swing of the heavy object, and prolongs the service life of the wire rope and pulley.

[0005] As in the prior art of the above-mentioned patent, the above-mentioned protective device is only arranged on one side of the hook and the cargo to prevent the cargo from swinging and hitting the frame, but no protective mechanism is set for the swinging of the hook and the cargo on the other two sides. If there is a crosswind, the cargo and the hook may swing on the planes on the other two sides, which may also pose a threat to the surrounding buildings or people. Utility Model Content

[0006] The purpose of the utility model is to provide a protective device for a crane to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a protective device of a crane, comprising a crane body, a lifting arm is fixedly installed on the top of the crane body, a lifting cable is arranged on the top of the lifting arm, a section of the lifting cable is fixedly installed with a hook, two support plates are fixedly installed on the top of the crane body, a connecting plate is fixedly installed between the two support plates, a vertical plate is fixedly installed on the top of the connecting plate, a through groove is opened on the vertical plate, the lifting cable passes through the through groove, two mobile frames are slidably installed on the vertical plate, an adjustment component is arranged between the two mobile frames, a winding roller is rotatably connected to the bottom ends of the two mobile frames, two gears are fixedly installed on the upper parts of the two winding rollers, a tooth plate is fixedly installed on the bottom end of the connecting plate, the two gears and the tooth plate are meshed with each other, a connecting rope is wound around the two winding rollers, and a limiting ring is provided on the outer sleeve of the lifting cable, and the two sides of the limiting ring are fixedly connected to the two connecting ropes.

[0008] As a further description of the above technical solution: the adjustment assembly includes two screws, which are rotatably installed on the side walls of the vertical plate, and a connecting rod is fixedly installed between the two screws. The two screws respectively penetrate the side walls of the mobile frame and are threadedly connected to the mobile frame.

[0009] As a further description of the above technical solution: a motor is fixedly installed on the side wall of one of the vertical plates, the output end of the motor is connected to the screw transmission, and the motor is electrically connected to the crane body through a PLC controller.

[0010] As a further description of the above technical solution: a support frame is fixedly installed on the bottom end of the crane body.

[0011] As a further description of the above technical solution: an anti-slip groove is arranged on the winding roller.

[0012] The utility model provides a protective device for a crane. It has the following beneficial effects: when the crane body needs to be used to lift goods, the two moving frames are moved toward the middle through the adjustment component. During the movement of the moving frames toward the middle, the gears below rotate under the action of the toothed plate, and the gear rotation drives the winding roller to rotate. The winding rollers on both sides simultaneously lower the connecting ropes, so that the limit ring moves downward and moves downward with the hook. The limit ring can limit the hook, the lifting cable above the hook, and the goods below the hook. The limit ring can limit all around, so that the hook and the goods can be stably raised without large-scale shaking.

[0013] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0014] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a protective device for a crane proposed by the utility model;

[0016] Figure 2 This is a three-dimensional structural schematic diagram of the utility model in which the protective device protects the hook after it is lowered;

[0017] Figure 3 A schematic diagram of a three-dimensional structure from another viewing angle of the present invention;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the connecting plate, tooth plate and movable frame of the utility model;

[0019] Figure 5 It is a schematic cross-sectional structure diagram of a winding roller side wall provided with an anti-slip groove according to the utility model.

[0020] Legend:

[0021] 1. Crane body; 2. Support frame; 3. Lifting arm; 4. Lifting cable; 6. Support plate; 7. Connecting plate; 8. Vertical plate; 9. Screw; 10. Connecting rod; 11. Moving frame; 12. Winding roller; 13. Gear; 14. Connecting rope; 15. Limiting ring; 16. Hook; 17. Motor; 18. Through groove; 19. Tooth plate; 20. Anti-slip groove. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-5A protective device for a crane comprises a crane body 1, a lifting arm 3 is fixedly installed on the top of the crane body 1, a lifting cable 4 is arranged on the top of the lifting arm 3, a section of the lifting cable 4 is fixedly installed with a hook 16, two support plates 6 are fixedly installed on the top of the crane body 1, a connecting plate 7 is fixedly installed between the two support plates 6, a vertical plate 8 is fixedly installed on the top of the connecting plate 7, a through groove 18 is opened on the vertical plate 8, the lifting cable 4 passes through the through groove 18, two moving frames 11 are slidably installed on the vertical plate 8, an adjusting component is arranged between the two moving frames 11, the bottom ends of the two moving frames 11 are rotatably connected with a winding roller 12, two gears 13 are fixedly installed on the two winding rollers 12, a tooth plate 19 is fixedly installed on the bottom end of the connecting plate 7, and the two gears 13 and the tooth plate 1 9 are meshed with each other, and a connecting rope 14 is wound around the two winding rollers 12. A limiting ring 15 is provided on the outer sleeve of the lifting cable 4, and the two sides of the limiting ring 15 are fixedly connected to the two connecting ropes 14. When the crane body 1 needs to be used to lift the goods, the two moving frames 11 are moved toward the middle by adjusting the assembly. During the movement of the moving frame 11 toward the middle, the gear 13 below rotates under the action of the toothed plate 19. The rotation of the gear 13 drives the winding roller 12 to rotate. The winding rollers 12 on both sides simultaneously lower the connecting rope 14, so that the limiting ring 15 moves downward and moves downward with the hook 16. The limiting ring 15 can limit the hook 16, the lifting cable 4 above the hook 16 and the goods below the hook 16. The limiting ring 15 can limit the surroundings, so that the hook 16 and the goods can rise stably without large-scale shaking.

[0024] As a preferred technical solution of this embodiment, the adjustment assembly includes two screws 9, which are rotatably installed on the side walls of the vertical plate 8, and a connecting rod 10 is fixedly installed between the two screws 9. The two screws 9 respectively penetrate the side walls of the mobile frame 11 and are threadedly connected to the mobile frame 11; through the rotation of the screws 9, under the limiting and guiding action of the mobile frame 11 and the connecting plate 7, the two mobile frames 11 can move relative to each other or move in the opposite direction at the same time.

[0025] As a preferred technical solution of this embodiment, a motor 17 is fixedly installed on the side wall of one of the vertical plates 8, and the output end of the motor 17 is transmission-connected to the screw rod 9, and the motor 17 is electrically connected to the crane body 1 through a PLC controller; the motor 17 controls the movement of the two moving blocks according to the up and down movement of the hook 16 by the crane, so that the limit ring 15 can move synchronously with the up and down movement of the hook 16.

[0026] As a preferred technical solution of this embodiment, a support frame 2 is fixedly installed at the bottom end of the crane body 1; the support frame 2 can increase the overall stability of the crane body 1 and improve the stability and safety performance of the device.

[0027] As a preferred technical solution of this embodiment, an anti-skid groove 20 is provided on the winding roller 12; the anti-skid groove 20 can increase the friction between the connecting rope 14 and the winding roller 12 to prevent slipping between the connecting rope 14 and the winding roller 12.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A protective device for a crane, comprising a crane body (1), a crane arm (3) being fixedly mounted on the top of the crane body (1), a crane cable (4) being arranged on the top of the crane arm (3), a hook (16) being fixedly mounted on a section of the crane cable (4), characterized in that: Two support plates (6) are fixedly installed on the top of the crane body (1), a connecting plate (7) is fixedly installed between the two support plates (6), a vertical plate (8) is fixedly installed on the top of the connecting plate (7), a through slot (18) is opened on the vertical plate (8), the lifting cable (4) passes through the through slot (18), two moving frames (11) are slidably installed on the vertical plate (8), an adjustment component is arranged between the two moving frames (11), and the two moving frames (11) are slidably installed on the vertical plate (8). ) is rotatably connected to the bottom end thereof with a winding roller (12), two gears (13) are fixedly mounted on the two winding rollers (12), a toothed plate (19) is fixedly mounted on the bottom end of the connecting plate (7), the two gears (13) and the toothed plate (19) are meshed with each other, a connecting rope (14) is wound around the two winding rollers (12), a limiting ring (15) is provided on the outside of the lifting cable (4), and the two sides of the limiting ring (15) are fixedly connected to the two connecting ropes (14).

2. A protective device for a crane according to claim 1, characterized in that: The adjustment assembly comprises two screw rods (9), the two screw rods (9) are rotatably mounted on the side walls of the vertical plate (8), a connecting rod (10) is fixedly mounted between the two screw rods (9), and the two screw rods (9) respectively penetrate the side walls of the moving frame (11) and are threadedly connected to the moving frame (11).

3. A protective device for a crane according to claim 2, characterized in that: A motor (17) is fixedly mounted on the side wall of one of the vertical plates (8); the output end of the motor (17) is drivingly connected to the screw rod (9); and the motor (17) is electrically connected to the crane body (1) via a PLC controller.

4. A protective device for a crane according to claim 1, characterized in that: A support frame (2) is fixedly mounted on the bottom end of the crane body (1).

5. The protective device for a crane according to claim 1, characterized in that: The winding roller (12) is provided with an anti-slip groove (20).

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