Boom system and hoisting equipment

Abstract

The utility model relates to the technical field of engineering machinery, and discloses an arm support system and hoisting equipment, which comprises a main arm and a fixed auxiliary arm, the heavy fly jib comprises a plurality of main chord pipes which extend in the length direction of the heavy fly jib and are parallel to one another, and the adjacent main chord pipes are connected through a plurality of web pipes to form a truss structure; a first connecting assembly is arranged at the first end of the heavy auxiliary arm, a second connecting assembly is arranged at the second end of the heavy auxiliary arm, the first connecting assembly is suitable for being connected with the main arm, and the second connecting assembly is suitable for being connected with the fixed auxiliary arm. Compared with a traditional sharp-mouth-shaped heavy fly jib, the truss type heavy fly jib has the advantages that the sectional dimension of the jib frame is larger, the bearing capacity of the jib frame is improved, a longer jib is easy to design, and the use requirement of a user on the longer heavy fly jib is met. And meanwhile, the connecting assemblies are arranged at the two ends of the heavy fly jib and can be used for connecting the main jib and the fixed fly jib, the heavy fly jib can serve as an extension jib of the fixed fly jib under the working condition of an electric tower, the higher and farther hoisting requirements are met, hoisting equipment with larger tonnage does not need to be used, the cost is reduced, and the application range is expanded.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically to a boom system and lifting equipment. Background Technology

[0002] The boom is a crucial component of lifting equipment such as crawler cranes. It comprises the main boom, a fixed jib, and a heavy-duty jib. The main boom can be used in combination with either the fixed or heavy-duty jib, allowing switching between fixed and heavy-duty jib modes to meet different lifting requirements and making lifting operations more flexible and efficient. Currently, commonly used heavy-duty jibs are generally pointed in shape, with one end connected to the main boom and the other end equipped with pulleys.

[0003] However, in heavy-duty jib mode, the cross-section of the heavy-duty jib gradually decreases from the main boom connection point to the boom head pulley, resulting in a relatively weaker lifting capacity for the same boom length, affecting the equipment's lifting performance. In fixed-jib mode, when used in applications such as lifting power towers (where the lifting height is high but the weight is light), the combination of the main boom and fixed jib may still be insufficient to meet the tower's lifting height requirements, necessitating the replacement with a larger tonnage crane and increasing equipment costs. Utility Model Content

[0004] This utility model provides a boom system and lifting equipment to solve or improve the problems in related technologies where the heavy-duty jib has relatively weak lifting capacity, affecting the lifting performance of the equipment, and cannot meet the lifting height requirements in special scenarios such as power tower conditions, thus increasing costs.

[0005] In a first aspect, this utility model provides a boom system, comprising:

[0006] Main boom and fixed auxiliary boom;

[0007] The heavy-duty boom includes multiple main chord tubes that extend along its length and are parallel to each other, and adjacent two main chord tubes are connected by multiple web tubes to form a truss structure, the cross section of which is rectangular.

[0008] The heavy-duty auxiliary boom has a first connecting component at one end and a second connecting component at the other end. The first connecting component is adapted to be connected to the main boom, and the second connecting component is adapted to be connected to the fixed auxiliary boom.

[0009] In one alternative implementation, it further includes:

[0010] A secondary boom mounting base is disposed on the side of the heavy-duty secondary boom, and the secondary boom mounting base is adapted to connect to the side of the main boom.

[0011] In one alternative embodiment, the number of the auxiliary boom mounting bases is at least two, and the plurality of the auxiliary boom mounting bases are spaced apart along the length direction of the heavy-duty auxiliary boom.

[0012] In one optional embodiment, the auxiliary arm mounting base includes:

[0013] A first connector is disposed on the side of the heavy-duty auxiliary boom, and the first connector is disposed along the height direction of the heavy-duty auxiliary boom;

[0014] A pair of second connectors are respectively disposed at both ends of the first connector;

[0015] A reinforcing rib is provided along the height direction of the heavy-duty sub-arm. The reinforcing rib is connected to the first connecting member and to a pair of second connecting members.

[0016] In one alternative implementation, it further includes:

[0017] The first pulley and the second pulley are both rotatably mounted on the second end of the heavy-duty auxiliary boom, and the first pulley and the second pulley are spaced apart along the height direction of the heavy-duty auxiliary boom.

[0018] In one alternative implementation, it further includes:

[0019] At least one first reinforcing plate is disposed at the first end of the heavy-duty auxiliary boom; and / or,

[0020] At least one second reinforcing plate is disposed at the second end of the heavy-duty auxiliary arm.

[0021] In one alternative embodiment, the first reinforcing plate and / or the second reinforcing plate are provided with at least one weight-reducing hole.

[0022] In one alternative implementation, the first connection component includes:

[0023] Multiple first connectors are correspondingly disposed and connected to one end of multiple main chord tubes, and the first connectors are adapted to connect to the main arm; and / or,

[0024] The second connection component includes:

[0025] Multiple second connectors are provided and connected to the other end of the multiple main chord tubes, and the second connectors are adapted to be connected to the fixed auxiliary arm.

[0026] In one alternative implementation, it further includes:

[0027] Multiple locking fasteners are provided to connect the heavy-duty auxiliary boom to the main boom and the fixed auxiliary boom, wherein the first connector and / or the second connector are provided with mounting holes adapted to the locking fasteners;

[0028] Multiple placement seats are provided, corresponding to multiple locking fasteners, and the multiple placement seats are provided on the heavy-duty auxiliary arm. The placement seats are used to place the locking fasteners.

[0029] Secondly, this utility model also provides a lifting device, including the boom system described above.

[0030] The boom system provided by this utility model consists of a truss-type heavy-duty jib constructed from multiple main chord tubes and multiple web tubes. Compared to traditional pointed boom systems, its boom cross-section is larger, significantly improving the load-bearing capacity of the heavy-duty jib and enhancing the lifting performance of the equipment. Furthermore, the truss-type heavy-duty jib ensures sufficient lifting capacity while facilitating the design of longer boom lengths to meet user needs for longer heavy-duty jibs. Simultaneously, connecting components are provided at both ends of the heavy-duty jib, allowing connection to the main boom and the fixed jib. In power tower applications, the heavy-duty jib can serve as an extension of the fixed jib, working in conjunction to achieve higher and farther lifting requirements without the need for larger tonnage lifting equipment, thus reducing costs and broadening its applicability. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is one of the structural schematic diagrams of the heavy-duty auxiliary boom according to an embodiment of the present utility model;

[0033] Figure 2 This is the second structural schematic diagram of the heavy-duty auxiliary boom according to an embodiment of the present utility model;

[0034] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle;

[0035] Figure 4 This is a schematic diagram of the boom system of this utility model when the main boom and heavy-duty auxiliary boom are used together;

[0036] Figure 5 This is a schematic diagram of the boom system of this utility model when the heavy-duty auxiliary boom is used as a fixed auxiliary boom extension arm;

[0037] Figure 6 This is a schematic diagram of the boom system in the transfer state according to an embodiment of the present utility model;

[0038] Figure 7 This is a schematic diagram of the installation of the auxiliary boom mounting base and the main boom according to an embodiment of the present utility model.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Heavy-duty auxiliary boom; 101. Main chord tube; 102. Side tube; 103. First end; 104. Second end; 2. First connecting assembly; 201. First connector; 3. Second connecting assembly; 301. Second connector; 4. Auxiliary boom mounting base; 401. First connector; 402. Second connector; 4021. Connecting hole; 403. Reinforcing rib; 5. First pulley; 6. Second pulley; 7. First reinforcing plate; 8. Second reinforcing plate; 9. Locking fastener; 901. Cotter pin; 10. Placement seat; 11. Weight reduction hole; 12. Mounting hole; 13. Rope guide bar; 14. Main boom; 1401. Mounting base; 15. Fixed auxiliary boom. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] In the description of this utility model, "a plurality of" means two or more. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] The following is combined with Figures 1 to 7 This describes the boom system and lifting equipment according to embodiments of the present invention.

[0046] According to an embodiment of the present invention, in one aspect, a boom system is provided, including a main boom 14, a fixed auxiliary boom 15, and a heavy-duty auxiliary boom 1, such as... Figure 1 As shown, the heavy-duty jib 1 includes multiple main chord tubes 101 extending parallel to each other along its length, and adjacent main chord tubes 101 are connected by multiple web tubes 102 to form a truss structure. The truss structure has a rectangular cross-section to ensure that the jib cross-section remains unchanged along its length, resulting in a stronger lifting capacity for the same length compared to tapered or pointed jibs in related technologies. Specifically, as... Figure 1 As shown, there are four main chord tubes 101. Adjacent main chord tubes 101 are connected by multiple web tubes 102 to form a stable truss structure, ensuring sufficient structural strength and rigidity. It should be noted that the number of web tubes 102 can be determined according to actual design requirements.

[0047] At the same time, such as Figure 1 As shown, the first end 103 of the heavy-duty auxiliary boom 1 is provided with a first connecting component 2, which is adapted to be connected to the main boom 14 via a locking fastener 9. The second end 104 of the heavy-duty auxiliary boom 1 is provided with a second connecting component 3, which is adapted to be connected to the fixed auxiliary boom 15 via a locking fastener 9.

[0048] Specifically, when using the heavy-duty auxiliary boom 1 alone to lift heavier materials, the first connecting assembly 2 is connected to the corresponding mounting position on the boom head of the main boom 14. At this time, as... Figure 4 As shown, the wire rope passes through the main boom 14 and the heavy-duty auxiliary boom 1 in sequence and is then connected to the hook. It is suitable for lifting larger prefabricated components and for turning over heavy objects. Under this condition, it has a greater lifting capacity than the traditional heavy-duty auxiliary boom, thus improving the lifting performance of the equipment.

[0049] When the heavy-duty auxiliary boom 1 is used as an extension arm of the fixed auxiliary boom 15, the first connecting assembly 2 is connected to the corresponding mounting position of the main boom 14, and the second connecting assembly 3 is connected to the corresponding mounting position of the fixed auxiliary boom 15. At this time, as... Figure 5As shown, the wire rope passes through the main boom 14, the heavy-duty auxiliary boom 1, and the fixed auxiliary boom 15 in sequence before being connected to the hook, thereby effectively increasing the overall boom length and greatly increasing the lifting capacity on small-tonnage models. In this way, the lifting height requirements of power towers can be met by using small-tonnage cranes.

[0050] This configuration, using multiple main chord tubes 101 and multiple web tubes 102 to form a truss-type heavy-duty jib, offers a larger jib cross-section and relatively lower manufacturing costs compared to traditional pointed heavy-duty jibs. This significantly improves the jib's load-bearing capacity and enhances the equipment's lifting performance. Furthermore, the truss-type heavy-duty jib ensures sufficient lifting capacity while facilitating the design of longer jibs, meeting users' needs for longer heavy-duty jibs. Simultaneously, both ends of the heavy-duty jib 1 are equipped with connecting components to connect the main jib 14 and the fixed jib 15. In tower operation, the heavy-duty jib 1 can serve as an extension of the fixed jib 15, working together to achieve higher and farther lifting requirements without the need for larger tonnage lifting equipment, greatly saving on procurement and operating costs, expanding its working range, and making lifting operations more flexible and efficient.

[0051] Furthermore, in some embodiments of this utility model, the boom system further includes a secondary boom mounting base 4. For example... Figure 1 As shown, the auxiliary boom mounting base 4 is disposed on the side of the heavy-duty auxiliary boom 1, and the auxiliary boom mounting base 4 is adapted to connect to the side of the main boom 14. This arrangement, as... Figure 6 As shown, the heavy-duty auxiliary boom 1 can be installed and fixed to the side of the main boom 14 for standby, and can be transported together with the main unit, eliminating the need for separate transport as an accessory, thus reducing transportation costs. Additionally, as... Figure 6 As shown, the heavy-duty auxiliary boom 1 and the fixed auxiliary boom 15 can be installed on both sides of the main boom 14 respectively, thereby making reasonable use of the installation space and avoiding interference with the turntable cover if the boom on the same side is too long.

[0052] Preferably, in some embodiments of this utility model, the number of auxiliary boom mounting seats 4 is at least two, and multiple auxiliary boom mounting seats 4 are distributed at intervals along the length direction of the heavy-duty auxiliary boom 1. It should be noted that the number of auxiliary boom mounting seats 4 needs to be specifically determined according to actual design requirements. For example, as... Figure 1 As shown, there are two auxiliary boom mounting bases 4. This arrangement, by arranging multiple auxiliary boom mounting bases 4, provides stronger structural support, making the connection between the heavy-duty auxiliary boom 1 and the main boom 14 more stable and reliable.

[0053] Specifically, in an optional embodiment of this utility model, the auxiliary boom mounting base 4 includes a first connecting member 401, a pair of second connecting members 402, and a reinforcing rib 403. For example... Figure 2As shown, the first connector 401 is disposed on the side of the heavy-duty sub-arm 1, and the first connector 401 is disposed along the height direction of the heavy-duty sub-arm 1. Specifically, the first connector 401 is connected to the main chord tube 101, for example, by means of bolt connection, welding or other methods.

[0054] A pair of second connectors 402 are respectively disposed at both ends of the first connector 401, specifically, as follows: Figure 2 As shown, the upper and lower ends of the first connector 401 are respectively connected to a pair of second connectors 402, for example, by welding. Furthermore, as... Figure 7 As shown, the first connector 401 is designed as a "U"-shaped plate, which increases the connection area with the second connector 402, making the connection more reliable. A pair of second connectors 402 are adapted to connect to the sides of the main arm 14, specifically, as shown... Figure 2 As shown, the second connector 402 is provided with a connecting hole 4021, which can be used for inserting bolts, pins, etc. Figure 7 As shown, a mounting base 1401 is provided on the side of the main boom 14. The mounting base 1401 and the second connecting member 402 are detachably connected by bolts, pins, etc., so as to realize the connection between the auxiliary boom mounting base 4 and the main boom 14.

[0055] like Figure 2 As shown, the reinforcing rib 403 is arranged along the height direction of the heavy-duty sub-arm 1. The reinforcing rib 403 is connected to the first connecting member 401, and the reinforcing rib 403 is also connected to a pair of second connecting members 402, for example, by welding, to ensure a more robust and reliable connection. Specifically, there are at least two reinforcing ribs 403, and the multiple reinforcing ribs 403 are distributed at intervals along the length direction of the heavy-duty sub-arm 1 to further improve the overall structural strength of the sub-arm mounting base 4.

[0056] This configuration creates a stable and reliable support connection structure, allowing the heavy-duty auxiliary boom 1 to be securely mounted on the side of the main boom 14, ensuring safety during transportation.

[0057] Furthermore, in some embodiments of this utility model, the boom system further includes a first pulley 5 and a second pulley 6. For example... Figure 1 As shown, the first pulley 5 and the second pulley 6 are both rotatably mounted on the second end 104 of the heavy-duty auxiliary boom 1, and the first pulley 5 and the second pulley 6 are spaced apart along the height direction of the heavy-duty auxiliary boom 1.

[0058] Specifically, the first pulley 5 is a guide pulley to change the direction of the force on the wire rope. For example... Figure 2 As shown, a rope guide bar 13 is provided above the first pulley 5 to prevent the wire rope from slipping. The rope guide bar 13 is rotatable to avoid friction with the wire rope. The second pulley 6 uses a pulley block, which allows for the expansion of more pulleys to achieve the purpose of saving effort. In addition, a rope guide bar 13 is also provided above the pulley block.

[0059] This design makes full use of the installation space at the end of the truss-type heavy-duty jib and arranges multiple pulleys in a reasonable manner to save effort and change the direction of force transmission, thereby making the load-bearing capacity of the heavy-duty jib 1 stronger.

[0060] In an optional embodiment of this utility model, the boom system further includes at least one first reinforcing plate 7 and / or at least one second reinforcing plate 8. The number of the first reinforcing plate 7 and the second reinforcing plate 8 can be specifically determined according to actual design requirements. Figure 1 As shown, multiple first reinforcing plates 7 are disposed at the first end 103 of the heavy-duty sub-arm 1, and multiple second reinforcing plates 8 are disposed at the second end 104 of the heavy-duty sub-arm 1, for example, by welding.

[0061] This configuration, by arranging multiple reinforcing plates, can strengthen the structural strength of the connection points at both ends of the heavy-duty jib 1, thereby ensuring that the heavy-duty jib 1 can better maintain its shape and stability when under stress, improving the reliability and safety of the heavy-duty jib 1, and enhancing the overall performance and service life of the boom system.

[0062] Furthermore, the first reinforcing plate 7 and / or the second reinforcing plate 8 are provided with at least one weight-reducing hole 11, wherein the number of weight-reducing holes 11 can be determined according to actual design requirements. This ensures structural strength while also reducing the weight of the boom to a certain extent.

[0063] In some embodiments of this utility model, such as Figure 1 As shown, the first connecting assembly 2 includes a plurality of first connectors 201, which are correspondingly disposed and connected to one end of a plurality of main chord tubes 101. The first connectors 201 are adapted to be connected to the main arm 14. Specifically, the first connectors 201 are connected to the main chord tubes 101 by means of threaded connection, welding, etc.

[0064] The second connecting assembly 3 includes a plurality of second connectors 301, which are correspondingly disposed and connected to the other end of a plurality of main chord tubes 101. The second connectors 301 are adapted to be connected to the fixed auxiliary arm 15. Specifically, the second connectors 301 are connected to the main chord tubes 101 by means of threaded connection, welding, etc.

[0065] This configuration, by arranging joints at both ends of each main chord tube 101 to form multiple connection points, ensures that the heavy-duty auxiliary boom 1 is reliably connected to the main boom 14 and the fixed auxiliary boom 15, thereby improving the stability and safety of the entire structure.

[0066] Specifically, in some embodiments of this utility model, the boom system further includes multiple locking fasteners 9 and multiple placement seats 10, with the multiple placement seats 10 corresponding to the multiple locking fasteners 9. The multiple locking fasteners 9 are suitable for connecting the heavy-duty auxiliary boom 1 to the main boom 14 and the fixed auxiliary boom 15, and the locking fasteners 9 are pins, bolts, etc. Figure 1 As shown, the first connector 201 and / or the second connector 301 are provided with mounting holes 12 that are adapted to the locking fastener 9. Taking the first connector 201 of the first end 103 as an example, each first connector 201 is provided with mounting holes 12. During installation, the mounting holes 12 of the first connector 201 are aligned with the corresponding holes of the main arm 14, and then the pin is inserted to connect the heavy-duty auxiliary arm 1 to the main arm 14. In addition, the locking fastener 9 is provided with a cotter pin 901 to prevent the locking fastener 9 from falling out of the mounting holes 12.

[0067] Furthermore, multiple mounting seats 10 are disposed on the heavy-duty auxiliary arm 1, and the mounting seats 10 are used to hold the locking fasteners 9. For example... Figure 3 As shown, the placement base 10 is a retaining ring, which is welded to the heavy-duty auxiliary arm 1, and the locking fastener 9 overlaps the retaining ring. With this configuration, when the locking fastener 9 is removed, it can be suspended on the placement base 10 to prevent it from being lost, so that it can be used for the next connection. The operation is flexible and convenient.

[0068] In summary, this utility model provides a boom system suitable for use in engineering machinery such as crawler cranes, including a main boom 14, a fixed jib 15, a heavy-duty jib 1, a jib mounting base 4, a first pulley 5, and a second pulley 6, etc. Specifically, as shown... Figure 1 As shown, the heavy-duty sub-arm 1 includes multiple main chord tubes 101 extending along its length and parallel to each other to form a truss structure. Adjacent main chord tubes 101 are connected by multiple web tubes 102. The first end 103 of the heavy-duty sub-arm 1 is provided with a first connecting assembly 2, which includes multiple first connectors 201. The multiple first connectors 201 are correspondingly disposed and connected to one end of the multiple main chord tubes 101, and the first connectors 201 are adapted to connect to the main arm 14. The second end 104 of the heavy-duty sub-arm 1 is provided with a second connecting assembly 3, which includes multiple second connectors 301. The multiple second connectors 301 are correspondingly disposed and connected to the other end of the multiple main chord tubes 101, and the second connectors 301 are adapted to connect to the fixed sub-arm 15.

[0069] Furthermore, the two ends of the heavy-duty auxiliary boom 1 are connected to the main boom 14 and the fixed auxiliary boom 15 respectively via fasteners 9. The first connector 201 and the second connector 301 are provided with mounting holes 12 that are adapted to the fasteners 9. The heavy-duty auxiliary boom 1 is also provided with multiple placement seats 10, which are correspondingly provided with multiple fasteners 9 and are used to place the fasteners 9. In addition, the first end 103 of the heavy-duty auxiliary boom 1 is provided with multiple first reinforcing plates 7, and the second end 104 of the heavy-duty auxiliary boom 1 is provided with multiple second reinforcing plates 8, thereby strengthening the structural strength at the connection positions of the two ends of the heavy-duty auxiliary boom 1. Furthermore, the second end 104 of the heavy-duty auxiliary boom 1 is also provided with a first pulley 5 and a second pulley 6. The second pulley 6 is located directly below the first pulley 5 and is configured as a pulley assembly.

[0070] In this embodiment, the auxiliary boom mounting base 4 is disposed on the side of the heavy-duty auxiliary boom 1. Specifically, the auxiliary boom mounting base 4 includes a first connecting member 401, a pair of second connecting members 402, and a reinforcing rib 403. The first connecting member 401 is disposed on the side of the heavy-duty auxiliary boom 1 and is arranged along the height direction of the heavy-duty auxiliary boom 1. The pair of second connecting members 402 are respectively disposed at both ends of the first connecting member 401 and are adapted to connect to the side of the main boom 14. The reinforcing rib 403 is arranged along the height direction of the heavy-duty auxiliary boom 1, and the reinforcing rib 403 is connected to the first connecting member 401 and to both of the pair of second connecting members 402. Preferably, the number of auxiliary boom mounting bases 4 is at least two, and the plurality of auxiliary boom mounting bases 4 are distributed at intervals along the length direction of the heavy-duty auxiliary boom 1.

[0071] The boom system in this embodiment comprises a truss-type heavy-duty jib constructed from multiple main chord tubes 101 and multiple web tubes 102. Compared to traditional pointed heavy-duty jibs, its boom cross-section is larger, significantly improving the boom's load-bearing capacity and enhancing the equipment's lifting performance. Furthermore, the truss-type heavy-duty jib ensures sufficient lifting capacity while facilitating the design of longer boom lengths to meet user demands for longer heavy-duty jibs. Simultaneously, both ends of the heavy-duty jib 1 are equipped with connecting components to connect the main boom 14 and the fixed jib 15. In tower operation, the heavy-duty jib 1 can also serve as an extension arm for the fixed jib 15, working together to achieve higher and farther lifting requirements without the need for larger tonnage lifting equipment, reducing costs and broadening its applicability. Moreover, the heavy-duty jib 1 can be installed and fixed to the side of the main boom 14 for standby use, eliminating the need for separate transport as an accessory and reducing transportation costs.

[0072] According to an embodiment of the present invention, another aspect provides a lifting device, including the boom system as described in the various embodiments above. The derivation process of this beneficial effect is largely similar to the derivation process of the beneficial effect of the boom system described above, and therefore will not be repeated here.

[0073] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A boom system, characterized in that, include: Main arm (14) and fixed auxiliary arm (15); The heavy-duty sub-arm (1) includes a plurality of main chord tubes (101) extending along its length and parallel to each other, and adjacent two main chord tubes (101) are connected by a plurality of web tubes (102) to form a truss structure, the cross section of the truss structure being rectangular; The heavy-duty auxiliary boom (1) has a first connecting component (2) at its first end (103) and a second connecting component (3) at its second end (104). The first connecting component (2) is adapted to be connected to the main boom (14), and the second connecting component (3) is adapted to be connected to the fixed auxiliary boom (15).

2. The boom system according to claim 1, characterized in that, Also includes: A secondary boom mounting base (4) is disposed on the side of the heavy-duty secondary boom (1), and the secondary boom mounting base (4) is adapted to be connected to the side of the main boom (14).

3. The boom system according to claim 2, characterized in that, The number of the auxiliary boom mounting bases (4) is at least two, and the plurality of the auxiliary boom mounting bases (4) are distributed at intervals along the length direction of the heavy auxiliary boom (1).

4. The boom system according to claim 2, characterized in that, The auxiliary boom mounting base (4) includes: A first connector (401) is disposed on the side of the heavy-duty auxiliary boom (1), and the first connector (401) is disposed along the height direction of the heavy-duty auxiliary boom (1); A pair of second connectors (402) are respectively disposed at both ends of the first connector (401), and the pair of second connectors (402) are adapted to connect to the side of the main arm (14); A reinforcing rib (403) is provided along the height direction of the heavy-duty sub-arm (1). The reinforcing rib (403) is connected to the first connecting member (401), and the reinforcing rib (403) is connected to a pair of second connecting members (402).

5. The boom system according to any one of claims 1 to 4, characterized in that, Also includes: The first pulley (5) and the second pulley (6) are both rotatably disposed at the second end (104) of the heavy-duty auxiliary boom (1), and the first pulley (5) and the second pulley (6) are spaced apart along the height direction of the heavy-duty auxiliary boom (1).

6. The boom system according to any one of claims 1 to 4, characterized in that, Also includes: At least one first reinforcing plate (7) is disposed at the first end (103) of the heavy-duty auxiliary boom (1); and / or, At least one second reinforcing plate (8) is disposed at the second end (104) of the heavy-duty auxiliary arm (1).

7. The boom system according to claim 6, characterized in that, The first reinforcing plate (7) and / or the second reinforcing plate (8) are provided with at least one weight-reducing hole (11).

8. The boom system according to any one of claims 1 to 4, characterized in that, The first connection component (2) includes: A plurality of first connectors (201) are correspondingly disposed and connected to one end of a plurality of main chord tubes (101), the first connectors (201) being adapted to connect to the main arm (14); and / or, The second connection component (3) includes: Multiple second connectors (301) are provided and connected to the other end of multiple main chord tubes (101), and the second connectors (301) are adapted to be connected to the fixed auxiliary arm (15).

9. The boom system according to claim 8, characterized in that, Also includes: Multiple locking fasteners (9) are adapted to connect the heavy-duty auxiliary arm (1) to the main arm (14) and the fixed auxiliary arm (15), wherein the first connector (201) and / or the second connector (301) are provided with mounting holes (12) adapted to the locking fasteners (9); Multiple placement seats (10) are provided corresponding to multiple locking fasteners (9), and the multiple placement seats (10) are provided on the heavy-duty auxiliary arm (1). The placement seats (10) are used to place the locking fasteners (9).

10. A lifting device, characterized in that, Includes the boom system as described in claim 9.

Images