Roof hoisting arm device

Abstract

The utility model discloses a roof hoisting arm device which is characterized by comprising a pull rod (1), a fixed pulley block (4), a movable pulley block (5) and a pulling arm mechanism (6), the movable pulley block (5) is connected with one end of the pull rod (1), the other end of the pull rod (1) is connected with the upper end of a hoisting arm main body (2), the fixed pulley block (4) is arranged at the upper end of a stand column (3), and the pulling arm mechanism (6) is arranged at the lower end of the stand column (3). According to the pull rod device, one pulley block is fixed to the top of the stand column, the pull rod part is light in weight and convenient to install, two supporting plates are arranged in the middle of the pulley block, strength is high, stability is good, and the pull arm mechanism is installed on the stand column and is convenient to install and simple in structure.

Description

Technical Field

[0001] The utility model relates to a lifting device, in particular to a roof lifting arm device. Background Art

[0002] Tower cranes are widely used as construction equipment for vertical and horizontal transportation in civil and industrial construction sites, highway and railway bridge projects, and power facility construction sites. With the rapid development of the economy, large-scale buildings are emerging one after another, and their heights generally exceed the normal independent installation and use height of tower cranes. For this reason, it is usually necessary to add attachment devices or use internal climbing tower cranes to meet the use requirements of higher heights. When the space is narrow and the truck crane cannot meet the requirements, or when an internal climbing tower crane is used, it is necessary to use a roof crane on the roof of the building to dismantle the tower crane. For medium and large tower cranes, the roof crane used is relatively large, and a light roof crane is needed to dismantle the large roof crane. For small tower cranes, a light roof crane can be directly used for dismantling. The existing roof crane arm pulling mechanism has the following problems: (1) Usually two pulley blocks are installed on the light roof crane pull rod, which is heavy and inconvenient to install and use. (2) The pull rod pulley frame is composed of two support plates, which are suspended in the middle, and the pulley shaft has high requirements. (3) The arm mechanism is installed on the roof, and a rotating component needs to be set to allow the pull rod and the boom to rotate in the horizontal direction. The structure is complex and installation and debugging are inconvenient. Utility Model Content

[0003] The utility model aims to provide a roof hanging arm device with high strength, good stability, convenient installation and simple structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A roof crane arm pulling device is characterized by comprising a pull rod, a fixed pulley block, a movable pulley block, and an arm pulling mechanism, wherein the movable pulley block is connected to one end of the pull rod, and the other end of the pull rod is connected to the upper end of the arm body, the fixed pulley block is arranged at the upper end of the column, and the arm pulling mechanism is arranged at the lower end of the column.

[0006] Preferably, the fixed pulley group includes a fixed pulley A and a fixed pulley B. The fixed pulley A and the fixed pulley B are respectively connected to a fixed pulley frame through two fixed pulley shafts. Two fixed pulley support plates are arranged in the fixed pulley frame. The fixed pulley support plates divide the five fixed pulleys B into three groups, wherein the two groups on both sides each have two fixed pulleys B, and the middle group has one fixed pulley B.

[0007] Preferably, the diameter of the fixed pulley A is smaller than that of the fixed pulley B, a total of five fixed pulleys B are provided, and the axes of the two fixed pulleys are in the same horizontal plane.

[0008] Preferably, the movable pulley group includes five movable pulleys, and the movable pulleys are connected to the movable pulley frame through a movable pulley shaft. Two movable pulley support plates are arranged in the movable pulley frame, and the movable pulley support plates divide the five movable pulleys into three groups, wherein the two groups on both sides each have two movable pulleys, and the middle group has one movable pulley.

[0009] Preferably, the arm pulling mechanism is connected with a cable, which passes through the fixed pulley A, the fixed pulley B, and the movable pulley in sequence, and is finally fixed on the fixed pulley frame.

[0010] Preferably, a bearing is provided between the movable pulley and the movable pulley shaft, and a bearing spacer is provided between the bearings.

[0011] Preferably, a bearing is provided between the fixed pulley B and the fixed pulley shaft, and a bearing spacer is provided between the bearings of the fixed pulley B.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] This patent adopts a pull rod device, in which a pulley group is fixed on the top of the column. The pull rod part is light in weight and easy to install. There are two support plates in the middle of the pulley group, which have high strength and good stability. The pulling arm mechanism is installed on the column, which is easy to install and has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the installation of a roof crane arm device;

[0015] Figure 2 It is a cross-sectional view of the movable pulley block;

[0016] Figure 3 is a schematic diagram of a fixed pulley block;

[0017] Figure 4 It is a cross-sectional view of the fixed pulley block;

[0018] In the figure: 1-pull rod, 2-arm body, 3-column, 4-fixed pulley block, 5-movable pulley block, 6-arm pulling mechanism, 41-fixed pulley frame, 42-fixed pulley A, 43-fixed pulley B, 44-fixed pulley shaft, 45-fixed pulley support plate, 51-movable pulley frame, 52-movable pulley, 53-movable pulley shaft, 54-movable pulley support plate, 55-bearing partition plate. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figure 1-4As shown, a roof crane arm device includes a pull rod 1, a fixed pulley block 4, a movable pulley block 5, and an arm pulling mechanism 6, wherein the movable pulley block 5 is connected to one end of the pull rod 1, and the other end of the pull rod 1 is connected to the upper end of the arm body 2, the fixed pulley block 4 is arranged at the upper end of the column 3, and the arm pulling mechanism 6 is arranged at the lower end of the column 3. The fixed pulley block 4 includes a fixed pulley A42 and a fixed pulley B43, the diameter of the fixed pulley A42 is smaller than that of the fixed pulley B43, and there are five fixed pulleys B43 in total, and the fixed pulley A42 and the fixed pulley B43 are respectively connected to the fixed pulley frame 41 through two fixed pulley shafts 44, and the two fixed pulley shafts 44 are in the same horizontal plane, and two fixed pulley support plates 45 are arranged in the fixed pulley frame 41, and the fixed pulley support plates 45 divide the five fixed pulleys B43 into three groups, wherein the two groups on both sides each have two fixed pulleys B43, and the middle group has one fixed pulley B43. The movable pulley group 5 includes five movable pulleys 52, and the movable pulleys 52 are connected to the movable pulley frame 51 through the movable pulley shaft 53. Two movable pulley support plates 54 are arranged in the movable pulley frame 51. The movable pulley support plates 54 divide the five movable pulleys 52 into three groups, wherein the two groups on both sides each have two movable pulleys 52, and the middle group has one movable pulley 52. ​​Bearings are arranged between the movable pulleys 52 and the movable pulley shaft 53, and bearing partitions 55 are arranged between the bearings.

[0021] The arm pulling mechanism 6 is connected with a cable, which passes through the fixed pulley A42, the fixed pulley B43, and the movable pulley 52 in sequence, and is finally fixed on the fixed pulley frame 41. The fixed pulley A42 and the fixed pulley B43 are fixed on the fixed pulley frame 41 at the same time. Compared with the traditional suspended setting of the fixed pulley B43, the relative positions of the fixed pulley A42 and the fixed pulley B43 are limited, which can ensure the stability of the cable on the fixed pulley A42 and prevent it from being derailed. At the same time, support plates are provided in the fixed pulley frame 41 and the movable pulley frame 51 to further enhance the stability.

[0022] 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 roof hanging arm device, characterized in that: It comprises a pull rod (1), a fixed pulley block (4), a movable pulley block (5), and an arm pulling mechanism (6), wherein the movable pulley block (5) is connected to one end of the pull rod (1), the other end of the pull rod (1) is connected to the upper end of the boom body (2), the fixed pulley block (4) is arranged at the upper end of the column (3), and the arm pulling mechanism (6) is arranged at the lower end of the column (3); The fixed pulley assembly (4) comprises a fixed pulley A (42) and a fixed pulley B (43). The fixed pulley A (42) and the fixed pulley B (43) are respectively connected to a fixed pulley frame (41) via two fixed pulley shafts (44). Two fixed pulley support plates (45) are arranged in the fixed pulley frame (41). The fixed pulley support plates (45) divide the five fixed pulleys B (43) into three groups, wherein the two groups on the two sides each have two fixed pulleys B (43), and the middle group has one fixed pulley B (43); The movable pulley group (5) comprises five movable pulleys (52), wherein the movable pulleys (52) are connected to a movable pulley frame (51) via a movable pulley shaft (53), and two movable pulley support plates (54) are arranged in the movable pulley frame (51). The movable pulley support plates (54) divide the five movable pulleys (52) into three groups, wherein the two groups on the two sides each have two movable pulleys (52), and the middle group has one movable pulley (52).

2. A roof suspension arm device according to claim 1, characterized in that: The diameter of the fixed pulley A (42) is smaller than that of the fixed pulley B (43), a total of five fixed pulleys B (43) are provided, and the two fixed pulley shafts (44) are located in the same horizontal plane.

3. A roof suspension arm device according to claim 1, characterized in that: The arm pulling mechanism (6) is connected to a cable, which passes through a fixed pulley A (42), a fixed pulley B (43), and a movable pulley (52) in sequence, and is finally fixed to the fixed pulley frame (41).

4. A roof suspension arm device according to claim 1, characterized in that: A bearing is provided between the movable pulley (52) and the movable pulley shaft (53), and a bearing partition plate (55) is provided between the bearings.

5. A roof suspension arm device according to claim 4, characterized in that: A bearing is provided between the fixed pulley B (43) and the fixed pulley shaft (44), and a bearing partition plate (55) is provided between the bearings of the fixed pulley B (43).

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