Movable arm structure of tower crane

Abstract

The utility model discloses a movable arm structure of a tower crane, which relates to the technical field of cranes and comprises an arm support, a plurality of groups of fourth rotating shafts are rotatably connected to the upper side and the lower side of a connecting plate, a fourth roller is rotatably connected to the middle of each fourth rotating shaft, and a plurality of groups of fifth rotating shafts are rotatably connected to the middle of the connecting plate. A connecting plate and an extending plate are installed above a connecting frame, a plurality of sets of fourth rotating shafts and fifth rotating shafts are arranged in the middle of the connecting plate, fourth rollers are rotationally arranged on the surfaces of the fourth rotating shafts, fifth rollers are rotationally arranged on the surfaces of the fifth rotating shafts, a third rotating shaft is arranged in the middle of the extending plate, and third rollers are rotationally arranged on the surfaces of the third rotating shafts. The third roller can change the direction of the towrope, the friction force generated when the towrope penetrates through the middle of the connecting plate is reduced through the fourth roller and the fifth roller, the towrope can be wound and unwound more smoothly, the service life of the towrope is prolonged, workers cannot be stumbled by the towrope when moving in the middle of the connecting frame, and potential safety hazards are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a movable arm structure of a tower crane. Background Art

[0002] A tower crane, also known as a tower crane, is a revolving crane with a boom mounted on a tall tower. It offers a large working area and is primarily used for vertical and horizontal material transport and component installation in building construction. It consists of a metal structure (including the tower, boom, and base), a working mechanism, and an electrical system.

[0003] The boom structure of the existing tower crane is simple, and there is no special structure for placing and fixing the rope, so the rope often passes through the middle of the boom. When entering the tower crane, the tower crane workers need to pass through the middle of the boom. In order to avoid touching the rope, it is very dangerous to cross the boom, which poses a great safety hazard. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings in the prior art and to propose a boom structure for a tower crane.

[0005] The lifting of the ...

[0006] As a further description of the above technical solution:

[0007] A tower head is fixedly connected to the middle of the upper end of the arm, a second rotating shaft is rotatably connected to the upper end of the tower head, and a second roller is rotatably connected to the middle of the second rotating shaft.

[0008] As a further description of the above technical solution:

[0009] The lower end of the arm is fixedly connected with a connecting frame.

[0010] As a further description of the above technical solution:

[0011] Two groups of first support plates are fixedly connected to the upper surface of the counterweight block, and the upper ends of the two groups of first support plates are rotatably connected to the selection shaft, and the middle of the selection shaft is fixedly connected to the first roller.

[0012] As a further description of the above technical solution:

[0013] The end of the arm away from the second support plate is fixedly connected to a counterweight block, the upper surface of the counterweight block is fixedly connected to a first mounting seat, the middle of the first mounting seat is fixedly connected to a first motor, and the output end of the first motor is fixedly connected to one end of the selection shaft.

[0014] As a further description of the above technical solution:

[0015] Limiting plates are provided at both ends of the first roller, the second roller and the sixth roller.

[0016] As a further description of the above technical solution:

[0017] A fiber rope is wound around the surface of the first roller, and the fiber rope is passed around the surfaces of the second roller, the third roller, the fifth roller and the sixth roller.

[0018] The utility model has the following beneficial effects:

[0019] In the utility model, a connecting plate and an extension plate are first installed above the connecting frame, and several groups of fourth rotating shafts and fifth rotating shafts are arranged in the middle of the connecting plate. A fourth roller rotates on the surface of the fourth rotating shaft, and a fifth roller rotates on the surface of the fifth rotating shaft. A third rotating shaft is arranged in the middle of the extension plate, and a third roller rotates on the surface of the third rotating shaft. The third roller will change the direction of the fiber rope, and the friction force of the fiber rope passing through the middle of the connecting plate is reduced by the fourth roller and the fifth roller, which can make the fiber rope retracted and released smoother, and improve the practical life of the fiber rope. In this way, workers will not be tripped by the fiber rope when moving in the middle of the connecting frame, thereby solving the safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the counterweight block of the utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the connecting plate part of the utility model.

[0023] Legend:

[0024] 1. Boom; 2. Connecting frame; 3. Tower head; 4. Connecting plate; 5. Extension plate; 6. Counterweight; 7. First mounting seat; 8. First motor; 9. First support plate; 10. Selecting shaft; 11. First roller; 12. (12); 13. Second shaft; 14. Second roller; 15. Third shaft; 16. Third roller; 17. First baffle; 18. Fourth shaft; 19. Fourth roller; 20. Fifth shaft; 21. Fifth roller; 22. Second baffle; 23. Second support plate; 24. Sixth shaft; 25. Sixth roller. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections, indirect connections through an intermediate medium, or internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Reference Figure 1-3The utility model provides an embodiment of a boom structure of a tower crane, including a boom 1, a connecting plate 4 and a connecting plate 4, which are rotatably connected to several groups of fourth rotating shafts 18 on the upper and lower sides, and a fourth roller 19 is rotatably connected to the middle of the fourth rotating shaft 18. The connecting plate 4 is rotatably connected to several groups of fifth rotating shafts 20 in the middle, and a fifth roller 21 is fixedly connected to the middle of the fifth rotating shaft 20. The fourth rotating shaft 18 and the fourth roller 19 are positioned correspondingly, and second baffles 22 are provided on both sides of the middle of the fourth roller 19 and the fifth roller 21. One end of the connecting plate 4 is fixedly connected to an extension plate 5, and the middle of the two groups of extension plates 5 are rotatably connected to the third rotating shaft 15. The middle of the third rotating shaft 15 is rotatably connected to the third roller 16, and first baffles 17 are provided on both sides of the middle of the third roller 16. The ends of the two groups of connecting plates 4 away from the extension plate 5 are fixedly connected to the second supporting plate 23, and the end of the second supporting plate 23 away from the extension plate 5 is fixedly connected to the sixth rotating shaft 24. The middle of the sixth rotating shaft 24 is rotatably connected to the sixth roller 25.

[0028] A tow rope 12 is wrapped around the surface of the first roller 11, and the tow rope 12 passes around the surfaces of the second roller 14, the third roller 16, the fifth roller 21 and the sixth roller 25. Limit plates are provided at both ends of the first roller 11, the second roller 14 and the sixth roller 25. One end of the arm 1 away from the second support plate 23 is fixedly connected to the counterweight 6, the upper surface of the counterweight 6 is fixedly connected to the first mounting seat 7, the middle of the first mounting seat 7 is fixedly connected to the first motor 8, the output end of the first motor 8 is fixedly connected to one end of the selection shaft 10, two groups of first support plates 9 are fixedly connected to the upper surface of the two groups of first support plates 9, the upper ends of the two groups of first support plates 9 are rotatably connected to the selection shaft 10, the middle of the selection shaft 10 is fixedly connected to the first roller 11, the middle of the upper end of the arm 1 is fixedly connected to the tower head 3, the upper end of the tower head 3 is rotatably connected to the second rotating shaft 13, the middle of the second rotating shaft 13 is rotatably connected to the second roller 14, and the lower end of the arm 1 is fixedly connected to the connecting frame 2.

[0029] Working principle: A connecting plate 4 and an extension plate 5 are installed above the connecting frame 2, and several groups of fourth rotating shafts 18 and fifth rotating shafts 20 are arranged in the middle of the connecting plate 4. A fourth roller 19 rotates on the surface of the fourth rotating shaft 18, and a fifth roller 21 rotates on the surface of the fifth rotating shaft 20. A third rotating shaft 15 is arranged in the middle of the extension plate 5, and a third roller 16 rotates on the surface of the third rotating shaft 15. The third roller 16 will change the direction of the fiber rope 12, and reduce the friction force of the fiber rope 12 passing through the middle of the connecting plate 4 through the fourth roller 19 and the fifth roller 21, which can make the fiber rope 12 smoother to be retracted and released, and improve the practical life of the fiber rope 12. The first motor 8 drives the selection shaft 10 to rotate, and the selection shaft 10 drives the first roller 11 to rotate the first roller 1 The rope 12 is wound up, and the rope 12 passes around the second roller 14 and changes direction. The second roller 14 rotates in the middle of the second rotating shaft 13 to reduce the friction between the second roller 14 and the rope 12. The rope 12 passes around the third roller 16 and changes direction, entering the middle of the connecting plate 4. It passes through several groups of fifth rollers 21, so that the rope 12 is in the middle of the connecting plate 4. The fourth roller 19 can protect the upper and lower ends of the connecting plate 4 to prevent the rope 12 from contacting the upper and lower ends of the connecting plate 4 and preventing the rope 12 from being damaged when moving. Finally, the rope 12 passes around the sixth roller 25 and moves downward, thereby lifting the object and removing the rope 12 from the middle of the connecting frame 2. This prevents workers from being tripped by the rope 12 when moving in the middle of the connecting frame 2, thus resolving safety hazards.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A boom structure of a tower crane, comprising a boom (1) and a connecting plate (4), characterized in that: The upper and lower sides of the connecting plate (4) are rotatably connected to a plurality of fourth rotating shafts (18), the middle of the fourth rotating shafts (18) are rotatably connected to a fourth roller (19), the middle of the connecting plate (4) is rotatably connected to a plurality of fifth rotating shafts (20), the middle of the fifth rotating shaft (20) is fixedly connected to a fifth roller (21), the fourth rotating shaft (18) and the fourth roller (19) are positioned correspondingly, and both sides of the middle of the fourth roller (19) and the fifth roller (21) are provided with a second baffle (22), and one end of the connecting plate (4) is fixedly connected to an extension The middle part of the two groups of extension plates (5) is rotatably connected to a third rotating shaft (15), the middle part of the third rotating shaft (15) is rotatably connected to a third roller (16), and first baffles (17) are provided on both sides of the middle part of the third roller (16), and one end of the two groups of connecting plates (4) away from the extension plate (5) is fixedly connected to a second supporting plate (23), one end of the second supporting plate (23) away from the extension plate (5) is fixedly connected to a sixth rotating shaft (24), and the middle part of the sixth rotating shaft (24) is rotatably connected to a sixth roller (25).

2. The boom structure of a tower crane according to claim 1, characterized in that: The middle portion of the upper end of the arm (1) is fixedly connected to a tower head (3), the upper end of the tower head (3) is rotatably connected to a second rotating shaft (13), and the middle portion of the second rotating shaft (13) is rotatably connected to a second roller (14).

3. The boom structure of a tower crane according to claim 2, characterized in that: The lower end of the arm (1) is fixedly connected to a connecting frame (2).

4. The boom structure of a tower crane according to claim 3, characterized in that: It also includes a counterweight block (6), the upper surface of which is fixedly connected to two groups of first support plates (9), the upper ends of the two groups of first support plates (9) are rotatably connected to a selection shaft (10), and the middle of the selection shaft (10) is fixedly connected to a first roller (11).

5. The boom structure of a tower crane according to claim 4, characterized in that: One end of the arm (1) away from the second support plate (23) is fixedly connected to a counterweight (6), an upper surface of the counterweight (6) is fixedly connected to a first mounting seat (7), a middle portion of the first mounting seat (7) is fixedly connected to a first motor (8), and an output end of the first motor (8) is fixedly connected to one end of the rotation shaft (10).

6. The boom structure of a tower crane according to claim 5, characterized in that: Limiting plates are provided at both ends of the first roller (11), the second roller (14) and the sixth roller (25).

7. The boom structure of a tower crane according to claim 6, characterized in that: A fiber rope (12) is wound around the surface of the first roller (11), and the fiber rope (12) is wound around the surfaces of the second roller (14), the third roller (16), the fifth roller (21), and the sixth roller (25).

Images