Balance arm assembly structure and tower crane transfer method

Abstract

The present invention relates to a balancing arm, comprising: an upper plane truss, the upper plane truss being used to mount an actuator of a tower crane; a lower plane truss, the lower plane truss being at least partially parallel to the upper plane truss, such that at least a mounting position for an electrical control portion of the tower crane is formed on the lower plane truss; and a web assembly, the web assembly connecting and supporting the upper plane truss and the lower plane truss. The present invention relates to a tower crane transfer method, using the above-mentioned balancing arm. The balancing arm and tower crane transfer method provided in this application can reduce the number of tower crane hoisting operations during the tower crane transfer process, improve tower crane hoisting efficiency, and accelerate the construction progress of a building project.

Description

Technical Field

[0001] The present invention belongs to the technical field of tower cranes, and in particular relates to a balance arm assembly structure and a tower crane transfer method. Background Art

[0002] At present, with the rapid development of the construction industry, the demand for tower cranes is increasing. For the construction of high-rise and super-high-rise buildings, the limitation of tower crane operating space and the convenience of group tower operations, the application of jib tower cranes is becoming more and more extensive.

[0003] The existing balancing arm is connected to the A-frame via a pin, and is in a single-layer suspended state. Due to its poor structural rigidity, only the luffing mechanism and the lifting mechanism are placed on the balancing arm. Some heavier driver's cab and electrical components, such as the lifting control cabinet, luffing control cabinet, lifting resistor cabinet, luffing resistor cabinet, rotary power supply, and rotary resistor cabinet, are placed on the upper support below the balancing arm. This structure requires the electrical components and the driver's cab to be hoisted one by one multiple times during the installation, disassembly, and transfer of the tower crane. This results in low hoisting efficiency during the installation, disassembly, and transfer of the tower crane. However, as the construction progresses, the tower crane needs to be continuously installed and disassembled between different buildings, which greatly affects the project construction progress. Summary of the Invention

[0004] To solve the above technical problems, the present invention aims to provide a balance arm assembly structure that can reduce the number of tower crane hoisting times during tower crane relocation, improve tower crane hoisting efficiency, and accelerate the construction progress of construction projects. Another object of the present invention is to provide a tower crane relocation method that utilizes the above balance arm assembly structure to achieve the above technical effects.

[0005] The technical solutions of the present invention are as follows:

[0006] The balance arm assembly structure includes:

[0007] An upper plane truss, wherein the upper plane truss is used to install an actuator of the tower crane;

[0008] a lower plane truss, the lower plane truss being at least partially parallel to the upper plane truss, so that at least a mounting position for an electric control part of the tower crane is formed on the lower plane truss;

[0009] A web member assembly is provided, wherein the web member assembly connects and supports the upper plane truss and the lower plane truss.

[0010] Preferably, the web assembly comprises:

[0011] A vertical web member is vertically or approximately vertically connected to the bottom of the upper plane truss and the upper part of the lower plane truss.

[0012] Preferably, the vertical web members are arranged at the load-bearing position of the upper plane truss, and a plurality of the vertical web members are provided.

[0013] Preferably, the web assembly further comprises:

[0014] a plurality of first oblique web members;

[0015] a plurality of second oblique web members having an inclination angle different from that of the first oblique web members;

[0016] The ends of the first oblique web member and the second oblique web member are in contact with or staggered with the upper plane truss and the lower plane truss, so that the first oblique web member, the second oblique web member and the upper plane truss form a quasi-triangular structural frame, and / or the first oblique web member, the second oblique web member and the lower plane truss form a quasi-triangular structural frame, and the quasi-triangular structural frame is located in at least one side of the box truss.

[0017] Preferably, a skylight is provided on the lower plane truss.

[0018] Preferably, the box truss comprises:

[0019] a support platform pivotally connected to a side portion of the box truss;

[0020] A bracket, one end of the bracket is hinged to the support platform, and the other end of the bracket is detachably connected to the side of the web assembly or the lower plane truss, so that when the other end of the bracket is in contact with the side of the web assembly, the support platform is in an expanded state; when the other end of the bracket is connected to the lower plane truss, the support platform is in a folded state.

[0021] A tower crane transfer method, wherein the tower crane transfer method adopts the above-mentioned balance arm assembly structure, and the tower crane transfer method comprises:

[0022] Pre-install the tower crane's actuator and electronic control parts in the box truss;

[0023] When the tower crane needs to be installed, the box truss is transported as a whole to the tower crane installation position, and then the box truss is hoisted as a whole from a low position to a high position;

[0024] When the tower crane needs to be moved, the box truss is hoisted from a high place to a low place.

[0025] Preferably, before the actuator and the electric control part of the tower crane are pre-installed in the box truss, the box truss is assembled, and the box truss assembly includes: connecting one end of the web assembly to the upper plane truss; connecting the other end of the web assembly to the lower plane truss; the upper plane truss is placed above the lower plane truss, and the lower plane truss is at least partially parallel to the upper plane truss;

[0026] Configure the lower plane truss to be the same length as the upper plane truss.

[0027] Preferably, the step of pre-installing the actuator and the electric control part of the tower crane in the box truss further comprises: installing a driver's cab on the tower crane above the upper plane truss.

[0028] Preferably, when the tower crane is in a high position, the other end of the bracket is detachably fixed to the side of the web assembly to support the platform to unfold;

[0029] When the tower crane is in a state of being transferred from a high position to a low position or is in a low position, the other end of the bracket is detachably fixed in the lower plane truss, the bracket part is placed in the lower plane truss, and the support platform is folded.

[0030] Compared with the prior art, the box truss provided by the present invention is part of the tower crane's balance arm assembly. Through the structural characteristics of the box truss itself, a two-layer structure is set up to place the tower crane's auxiliary components. The upper plane truss is installed with the tower crane's actuator, and the lower plane truss is installed with the tower crane's electronic control part. The box truss contains an integrated modular unit of multiple tower crane components. During the tower crane relocation process, such as tower crane installation, tower crane disassembly, and tower crane installation at another location after disassembly, this integrated modular unit of the box truss has great advantages. When the box truss is transferred from one installation location to another, the integrated modular unit can be placed on a trailer or container for overall transportation, and can also be hoisted from a low ground position to a high tower crane position, or from a high tower crane position to a low ground position. The balance arm assembly structure provided by the present invention not only has the function of a traditional balance arm, but also acts as a tower crane placement frame when the tower crane is relocated. Therefore, the balance arm assembly structure provided by the present invention can reduce the number of tower crane hoisting operations during the tower crane transfer process, improve the tower crane hoisting efficiency, and accelerate the progress of construction projects.

[0031] The present invention provides a tower crane transfer method, which applies the above-mentioned balance arm assembly structure and can achieve the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 It is a structural diagram of a balance arm in the prior art;

[0034] Figure 2 A schematic structural diagram of a balance arm assembly structure provided by an embodiment of the present invention;

[0035] Figure 3A top view of the balance arm assembly structure provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the structure of the box truss upper support platform when it is unfolded according to an embodiment of the present invention;

[0037] Figure 5 A schematic structural diagram of the box-shaped truss upper support platform provided by an embodiment of the present invention when folded.

[0038] Description of Reference Numerals

[0039] 01. Luffing mechanism; 02. Hoisting mechanism; 03. Balance arm; 04. Resistance cabinet; 05. Upper support;

[0040] 06. Electric control cabinet; 07. Driver's cab; 08. A-frame; 10. Upper plane truss; 11. Lower plane truss; 12. Web member assembly; 121. Vertical web member; 122. First oblique web member; 123. Second oblique web member; 13. Support platform; 14. Bracket; 15. Small chain; 16. Pin; 17. Actuator; 18. Electric control part; 19. Driver's cab; 20. Skylight. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0042] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0043] In the prior art, such as Figure 1As shown, the bottom of the balancing arm 03 is connected to the upper part of the A-frame 08, and the balancing arm 03 is in a single-layer suspended state. Since the structural rigidity of the entire balancing arm 03 is poor and the load-bearing capacity is limited, only the lightweight variable-length mechanism 01 and the lifting mechanism 02 are installed above the balancing arm 03. Some heavier driver's cab 07 and electrical parts, such as the electric control cabinet 06, the resistor cabinet 04 and the power supply, are placed on the upper support 05 below the balancing arm 03. When the tower crane is transferred, it is necessary to continuously transport, install and dismantle the tower crane between different buildings. For example, during installation, the balance arm 03 needs to be hoisted separately from the electric control cabinet 06 and the resistor cabinet 04, and the electric control cabinet 06 and the resistor cabinet 04 need to be hoisted; during disassembly, the electric control cabinet 06 and the resistor cabinet 04 need to be hoisted to the ground one by one; when the disassembled parts of the tower crane are transferred from one place to another, the transportation of the electric control cabinet 06, the resistor cabinet 04 and the balance arm 03 is extremely difficult. Therefore, in the existing technology, there are problems such as many tower crane hoisting times and low tower crane transfer efficiency, which leads to slow construction progress of the building project.

[0044] Please Figures 2 to 5 As shown, the balance arm assembly structure provided by the present application includes an upper plane truss 10, a first cavity for accommodating other objects is formed above the upper plane truss 10; a lower plane truss 11, the lower plane truss 11 is at least partially parallel to the upper plane truss 10, so that a second cavity for accommodating other objects is formed between the lower plane truss 11 and the upper plane truss 10; and a web assembly 12, connecting and supporting the upper plane truss 10 and the lower plane truss 11.

[0045] Please Figures 2 to 3 Compared with the prior art, the box truss provided by the present invention is part of the balance arm assembly structure of the tower crane. Through the structural characteristics of the box truss itself, a two-layer structure is set up to place the tower crane's auxiliary components. The upper plane truss 10 is installed with the tower crane's actuator 17, and the lower plane truss 11 is installed with the tower crane's electronic control unit 18. The box truss forms an integral modular unit with multiple tower crane components installed. During the tower crane relocation process, such as tower crane installation, tower crane disassembly, and tower crane installation at another location after disassembly, this integral modular unit of the balance arm assembly structure has great advantages. When the balance arm assembly structure is transferred from one installation location to another, the integral modular unit can be placed on a trailer or container to achieve overall transportation, and can also be hoisted from a low ground position to a high tower crane position, or from a high tower crane position to a low ground position. The balance arm assembly structure provided by the present invention not only has the function of a traditional balance arm, but also acts as a tower crane placement frame when the tower crane is relocated. Therefore, the balance arm assembly structure provided by the present invention can reduce the number of tower crane hoisting operations during the tower crane transfer process, improve the tower crane hoisting efficiency, and accelerate the progress of construction projects.

[0046] Different from the prior art, the balance arm assembly structure provided in the present application provides a larger installation space for the tower crane's actuator 17, the electronic control part 18 and the driver's cab, thereby improving the space utilization of the box truss itself. At the same time, before obtaining the present technical solution, the inventor analyzed the reasons for the low efficiency of tower crane transfer. Through multiple statistical experiments, it was found that the repeated installation and lifting of the electric control cabinet, resistance cabinet and power cabinet in the electric control part 18 was the main reason for the low efficiency of tower crane transfer. In order to avoid the repeated lifting of the electric control part 18 of the tower crane, the box truss was improved and the box truss was set to a double-layer structure. In order to improve the load-bearing capacity of the box truss, a web assembly 12 was set between the upper plane truss 10 and the lower plane truss 11. In the prefabrication stage of the balance arm, the actuator 17 of the tower crane was installed on the upper plane truss 10, and the electric control part 18 of the tower crane was installed on the lower plane truss 11. The box truss can be transported as a whole together with the actuator 17 and the electric control part 18. At the same time, when the tower crane is hoisted, it can be hoisted as a whole from bottom to top and from top to bottom. Therefore, during the tower crane transfer process, the number of tower crane hoisting times can be reduced, the tower crane hoisting efficiency can be improved, and the progress of the construction project can be accelerated.

[0047] The advantages of the balance arm assembly structure provided by this application in multiple embodiments are described in detail below:

[0048] Embodiment 1: During the production process of the box truss, the actuator 17, electrical parts, etc. of the tower crane can be pre-installed on the upper plane truss 10 or the lower plane truss 11. The box truss forms an integral modular unit with multiple components of the tower crane installed, reducing the high-altitude installation work on the tower crane and improving the safety of construction workers.

[0049] Embodiment 2: After the box truss is assembled on the ground (the actuator 17, electrical parts, etc. have been installed), when the tower crane is transferred (moved from one location to another), the balance arm assembly structure can be placed on a trailer or container for overall transportation, thereby reducing the frequency of use of transportation equipment such as trailers or containers, improving the efficiency of tower crane transfer and reducing the cost of tower crane transfer.

[0050] In the third embodiment, the electric control part 18 of the tower crane is installed on the lower plane truss 11, and the actuator 17 of the tower crane is installed on the upper plane truss 10. There are many cables between the actuator 17 and the electric control part 18. This structure of the balance arm assembly structure makes the cable routing shortest and more beautiful during the use of the tower crane, and also reduces the risk of safety accidents of the tower crane caused by cable damage.

[0051] In the fourth embodiment, when the length of the upper plane truss 10 is approximately the same as the length of the lower plane truss 11, the balance arm assembly structure not only has the advantages in the above three scenarios, but also can obtain the smallest possible turning radius. Specifically, in the prior art, the electric control parts 18 of the tower crane are all installed on the platform of the upper support. In order to accommodate these electric control parts 18, the platform of the upper support is relatively wide, and the tower crane needs to perform a turning operation. In order to avoid collision between the upper support and the building, the distance between the tower crane and the building after installation is usually set relatively far. The box-shaped truss provided in the present application provides a larger installation space for the electric control part 18, so that the outer dimensions of the upper support of the tower crane are as small as possible. At the same time, the lengths of the upper plane truss 10 and the lower plane truss 11 are approximately the same, which reduces the outer dimensions of the balance arm assembly structure. Therefore, the balance arm assembly structure of the present application makes the tower crane structure compact, the turning radius is small, the high-rise building attachment frame can be as short as possible, the attachment force is good, and the safety is high.

[0052] It should be noted that in order to make the inventive concept, purpose and technical effect of the present invention clearer, the above content provides examples of the tower crane components installed on the upper plane truss 10 and the lower plane truss 11. The components installed on the upper plane truss 10 and the lower plane truss 11 cannot be considered as a specific limitation of the balance arm assembly structure provided in this application. Adaptive adjustments can be made according to different application scenarios of the balance arm. The purpose of the balance arm assembly structure provided in this application is to provide a balance arm structure that can simultaneously meet the scenarios including but not limited to the above four embodiments, and provide more favorable technical support for the transfer and use of the tower crane.

[0053] In order to make the balance arm assembly structure provided by the present application have better structural rigidity, further improvements are made to the box truss.

[0054] Specifically, the web member assembly 12 includes a vertical web member 121, which is vertically or approximately vertically connected to the bottom of the upper plane truss 10 and the upper part of the lower plane truss 11. With this arrangement, the vertical web member 121 provides greater support force for the upper plane truss 10, thereby improving the overall structural rigidity of the box truss.

[0055] Furthermore, the vertical web members 121 are arranged at the load-bearing position of the upper plane truss 10. There are multiple vertical web members 121. The vertical web members 121 are arranged at the load-bearing position of the upper plane truss 10. It can be understood that the upper plane truss 10 is installed at a position where heavy objects are installed to avoid excessive local load on the upper plane truss 10.

[0056] In the embodiment provided in the present application, the web member assembly 12 also includes: a plurality of first oblique web members 122, a plurality of second oblique web members 123, which have different inclination angles from the first oblique web members 122; the ends of the first oblique web members 122 and the second oblique web members 123 are in contact with or staggered with the upper plane truss 10 and the lower plane truss 11, so that the first oblique web members 122, the second oblique web members 123 and the upper plane truss 10 form a quasi-triangular structural frame, and / or the first oblique web members 122, the second oblique web members 123 and the lower plane truss 11 form a quasi-triangular structural frame, and the quasi-triangular structural frame is located in at least one side of the box truss.

[0057] In the above embodiment, the upper plane truss 10 and the lower plane truss 11 of the provided box truss are at least partially parallel. Preferably, the upper plane truss 10 and the lower plane truss 11 are of substantially the same length. The web member assembly 12 is enclosed between the upper plane truss 10 and the lower plane truss 11, providing the box truss with improved structural rigidity. In this embodiment, the web member assembly 12 bears a relatively large load. To further enhance the overall rigidity of the box truss, a plurality of triangular structural frames are provided on one or more of the side surfaces between the upper plane truss 10 and the lower plane truss 11. The triangular structures are formed by at least first and second diagonal web members 122 and 123 having different inclination angles and enclosed by the upper plane truss 10 or the lower plane truss 11. The different arrangements of the first and second diagonal web members 122 and 123 decompose the tension or compression forces acting on the box truss, thereby achieving improved structural rigidity for the box truss. Among them, the ends of the first oblique web member 122 and the second oblique web member 123 are in contact or staggered connection with the upper plane truss 10 and the lower plane truss 11, the purpose of which is to obtain more connection nodes, so that the triangular structure frame obtains better stability. During the tower crane transfer process, the structural rigidity of the box truss and the stability of the triangular structure improve the safety and reliability of the tower crane transfer hoisting.

[0058] Furthermore, the vertical web member 121 is placed in the quasi-triangular structural frame. Preferably, one end of the vertical web member 121 is located between the first oblique web member 122 and the second oblique web member 123, so that the quasi-triangular structural frame has better stability.

[0059] Among them, a skylight is provided on the lower plane truss. Under applicable working conditions, when the inverter of the electronic control part needs maintenance, the remote control is used to remotely lower the hook, connect it with the lifting lug on the inverter, drag the inverter out of the electrical cabinet, and hoist it to the skylight position. At the same time, the tower crane rotates to one side, opens the skylight, lowers the inverter to the platform, and then hoisted to the ground for maintenance by a trolley.

[0060] Please Figure 4 、 Figure 5As shown, in the embodiment provided by the present application, the box truss includes a support platform 13, which is pivotally connected to the side of the box truss; a bracket 14, one end of the bracket 14 is hinged to the support platform 13, and the other end of the bracket 14 is detachably connected to the side of the web assembly 12 or the lower plane truss 11, so that when the other end of the bracket 14 is in contact with the side of the web assembly 12, the support platform 13 is in an unfolded state; when the other end of the bracket 14 is connected to the lower plane truss 11, the support platform 13 is in a folded state. This structure of the box truss allows the box truss to obtain a more favorable operating space in different scenarios. For example, when the actuator 17 of the tower crane is to be installed on the upper plane truss 10 of the box truss, one end of the bracket 14 is abutted against the side of the web assembly 12. While stabilizing the expanded state of the support platform 13, the support platform 13 can be used as a walking passage for construction workers to install the actuator 17 without occupying the position on the upper plane truss 10 to free up a walking passage or installation operation position for construction workers, thereby making the best use of the floor space on the upper plane truss 10. When the box truss needs to be transported or hoisted as a whole, one end of the bracket 14 is connected to the lower plane truss 11, so that the bracket 14 is at least partially accommodated in the cavity between the upper plane truss 10 and the lower plane truss 11, and the support platform 13 and the bracket 14 are avoided as much as possible from colliding with other objects during transportation or hoisting. This design of the support platform 13 and the bracket 14 allows the actuator 17 and the electronic control part 18 of the tower crane to be installed on the box truss with a larger installation space, and also provides construction personnel with a convenient walking channel and installation operation position, making the box truss of the tower crane more practical.

[0061] Regarding the detachable connection between the bracket 14 and the web assembly 12, and the detachable connection between the bracket 14 and the lower plane truss 11, there are various solutions that can meet the requirements of the above-mentioned embodiment. For example, one end of the bracket 14 can be connected to a small chain 15 (similar to a connector), and the other end of the small chain 15 can be connected to a pin 16. The pin 16 can be matched with a hole in the web assembly 12, and the pin 16 can also be matched with a hole in the lower plane truss 11, so that the support platform 13 is stable in the unfolded state or folded state. In addition, the provision of the small chain 15 can prevent the pin 16 from being lost.

[0062] In an embodiment provided by the present invention, a tower crane transfer method is provided, which applies the above-mentioned balance arm assembly structure. The tower crane transfer method includes: pre-installing the tower crane's actuator 17 and the electric control part 18 in a box truss;

[0063] When the tower crane needs to be installed, the box truss is transported as a whole to the tower crane installation position, and then the box truss is hoisted as a whole from a low place to a high place; when the tower crane needs to be moved, the box truss is hoisted as a whole from a high place to a low place.

[0064] During the prefabrication stage of the box truss, the tower crane's actuator 17 is installed on the upper plane truss 10, and the tower crane's electrical control unit 18 is installed on the lower plane truss 11. The box truss, along with the actuator 17 and electrical control unit 18, can be transported as a whole. Furthermore, during the tower crane hoisting process, the entire crane can be hoisted from bottom to top or from top to bottom. This reduces the number of tower crane hoisting operations during the tower crane transfer process, improves tower crane hoisting efficiency, and accelerates the progress of construction projects. The technical effects of this method are described in detail in the various embodiments of the balance arm assembly structure and will not be further elaborated here.

[0065] Before pre-installing the actuator 17 and the electronic control part 18 of the tower crane in the box truss, the box truss is assembled. The assembly of the box truss includes: connecting one end of the web assembly 12 to the upper plane truss 10; connecting the other end of the web assembly 12 to the lower plane truss 11; placing the upper plane truss 10 above the lower plane truss 11, and the lower plane truss 11 is at least partially parallel to the upper plane truss 10; and configuring the length of the lower plane truss 11 to be equal to that of the upper plane truss 10.

[0066] Based on the previous embodiment, the tower crane transfer method is further improved. Pre-installing the tower crane's actuator 17 and electronic control unit 18 in the box truss also includes installing the tower crane's operator's cab 19 above the upper planar truss 10. In particular, when the tower crane is a luffing jib tower crane, installing the operator's cab 19 above the upper planar truss 10 allows the operator to obtain a wider viewing angle when operating the tower crane's boom, effectively observing the boom's luffing angle and improving the safety of the tower crane.

[0067] In the embodiment provided by the present invention, the tower crane transfer method includes: when the tower crane is in a high position, the other end of the bracket 14 is detachably fixed to the side of the web assembly 12, and the support platform 13 is unfolded; when the tower crane is in a state of being transferred from a high position to a low position or when the tower crane is in a low position, the other end of the bracket 14 is detachably fixed to the lower plane truss 11, the bracket 14 is partially placed in the lower plane truss 11, and the support platform 13 is folded. When the actuator 17 of the tower crane is to be installed on the upper plane truss 10 of the box truss, one end of the bracket 14 is brought into contact with the side of the web assembly 12. While stabilizing the unfolded state of the support platform 13, the support platform 13 can serve as a walking path for construction personnel to install the actuator 17, without occupying space on the upper plane truss 10 to free up a walking path or installation operation position for construction personnel, thereby making the best use of the floor space on the upper plane truss 10. When the box truss needs to be transported or hoisted as a whole, one end of the bracket 14 is connected to the lower plane truss 11, so that the bracket 14 is at least partially accommodated in the cavity between the upper plane truss 10 and the lower plane truss 11, and the support platform 13 and the bracket 14 are avoided as much as possible from colliding with other objects during transportation or hoisting. This design of the support platform 13 and the bracket 14 allows the actuator 17 and the electronic control part 18 of the tower crane to be installed on the box truss with a larger installation space, and also provides construction personnel with a convenient walking channel and installation operation position, making the box truss of the tower crane more practical.

[0068] The embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other.

[0069] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The balance arm assembly structure is characterized by: It includes a box truss, a support platform (13) and a bracket (14), The box truss comprises: An upper plane truss (10), the upper plane truss (10) being used to install an actuator (17) of a tower crane; a lower plane truss (11), the lower plane truss (11) being at least partially parallel to the upper plane truss (10), so that at least a mounting position for an electric control part (18) of the tower crane is formed on the lower plane truss (11); a web member assembly (12), the web member assembly connecting and supporting the upper plane truss (10) and the lower plane truss (11); A driver's cab (19) is installed above the upper plane truss (10); The support platform (13) is pivotally connected to the side of the box truss; one end of the bracket (14) is hinged to the support platform (13), and the other end of the bracket (14) is detachably connected to the side of the web assembly (12) or the lower plane truss (11), so that when the other end of the bracket (14) is in contact with the side of the web assembly (12), the support platform (13) is in an unfolded state; when the other end of the bracket (14) is connected to the lower plane truss (11), the support platform (13) is in a folded state.

2. The balance arm assembly structure according to claim 1, characterized in that: The web assembly (12) comprises: A vertical web member (121) is vertically or approximately vertically connected to the bottom of the upper plane truss (10) and the upper part of the lower plane truss (11).

3. The balance arm assembly structure according to claim 2, characterized in that: The vertical web members (121) are arranged at the load-bearing position of the upper plane truss (10), and a plurality of the vertical web members (121) are provided.

4. The balance arm assembly structure according to claim 2, characterized in that: The web assembly (12) further comprises: a plurality of first oblique web members (122); a plurality of second oblique web members (123) having an inclination angle different from that of the first oblique web members (122); The ends of the first oblique web member (122) and the second oblique web member (123) are in contact with or staggered with the upper plane truss (10) and the lower plane truss (11), so that the first oblique web member (122), the second oblique web member (123) and the upper plane truss (10) form a quasi-triangular structural frame, and / or the first oblique web member (122), the second oblique web member (123) and the lower plane truss (11) form a quasi-triangular structural frame, and the quasi-triangular structural frame is located in at least one side of the box truss.

5. The balance arm assembly structure according to claim 4, characterized in that: A skylight is provided on the lower plane truss (11).

6. A tower crane transfer method, characterized in that: The tower crane transfer method adopts the balance arm assembly structure according to claim 1, and the tower crane transfer method includes: Pre-installing the tower crane's actuator (17) and electric control part (18) in the box truss; When the tower crane needs to be installed, the box truss is transported as a whole to the tower crane installation position, and then the box truss is hoisted as a whole from a low position to a high position; When the tower crane needs to be moved, the box truss is hoisted from a high place to a low place.

7. The tower crane transfer method according to claim 6, characterized in that: Before the actuator (17) and the electric control part (18) of the tower crane are pre-installed in the box truss, the box truss is assembled. The box truss assembly includes: connecting one end of the web assembly (12) to the upper plane truss (10); connecting the other end of the web assembly (12) to the lower plane truss (11); the upper plane truss (10) is placed above the lower plane truss (11), and the lower plane truss (11) is at least partially parallel to the upper plane truss (10); The length of the lower plane truss (11) is configured to be equal to that of the upper plane truss (10).

8. The tower crane transfer method according to claim 6, characterized in that: The said pre-installing the actuator (17) and the electric control part (18) of the tower crane in the box truss also includes: installing the driver's operating room (19) on the tower crane above the upper plane truss (10).

9. The tower crane transfer method according to claim 6, characterized in that: When the tower crane is in a high position, the other end of the bracket (14) is detachably fixed to the side of the web assembly (12), and the support platform (13) is unfolded; When the tower crane is in a state of being transferred from a high position to a low position or is in a low position, the other end of the bracket (14) is detachably fixed in the lower plane truss (11), the bracket (14) is partially placed in the lower plane truss (11), and the supporting platform (13) is folded.

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