Cargo boom assembly and crane

Abstract

The utility model relates to the field of engineering machinery, and discloses a cargo boom assembly and a crane, the cargo boom assembly mainly comprises a cargo boom body, a hoisting mechanism and a supporting pulley, a boom body containing cavity is formed in the cargo boom body, the hoisting mechanism is arranged in the boom body containing cavity and comprises a hoisting rope extending in the length direction of the boom body containing cavity, and the supporting pulley is arranged in the boom body containing cavity. The supporting pulley is arranged in the arm body containing cavity and used for supporting the lifting rope in a jacking mode. According to the cargo boom assembly and the crane, the maintenance difficulty of the lifting rope can be reduced, the operation safety is improved, the space layout of the balance arm is optimized, the rotation radius of the balance arm is reduced, and the rotation flexibility of the crane is improved.

Description

Technical Field

[0001] This application belongs to the technical field of construction machinery, and particularly relates to a boom assembly and a crane. Background Art

[0002] In existing tower cranes, the hoisting mechanism is usually arranged on the counterweight boom. The hoisting rope driven by the hoisting mechanism needs to bypass the pulley on the upper chord of the boom to extend to the head of the boom. When maintenance personnel repair the hoisting rope, they need to work on the upper chord, and the safety is very low. In addition, to provide enough space for installing the hoisting mechanism, a longer counterweight boom needs to be set, resulting in a larger slewing radius of the counterweight boom and lower flexibility. Summary of the Invention

[0003] In view of the above-mentioned at least one defect or deficiency of the prior art, this application provides a boom assembly and a crane, which can reduce the maintenance difficulty of the hoisting rope, improve the operation safety, optimize the spatial layout of the counterweight boom, and reduce its slewing radius.

[0004] To achieve the above object, on the one hand, this application provides a boom assembly, including:

[0005] A boom body, an arm body cavity is formed inside the boom body;

[0006] A hoisting mechanism, arranged in the arm body cavity and including a hoisting rope extending along the length direction of the arm body cavity; and

[0007] A supporting pulley, arranged in the arm body cavity and used to support the hoisting rope.

[0008] In some embodiments, the boom body includes a root boom section and a main boom section. The head of the root boom section is connected to the tail of the main boom section, and the arm body cavity is formed in the main boom section.

[0009] In some embodiments, there are multiple main boom sections, and the multiple main boom sections are sequentially connected end to end. The hoisting mechanism is arranged in the arm body cavity of one of the main boom sections connected to the root boom section among the multiple main boom sections.

[0010] In some embodiments, the boom body is provided with a first arm body ear plate, the bottom of the hoisting mechanism is provided with a mechanism mounting ear plate, and the boom assembly includes a first connecting component for connecting and fixing the first arm body ear plate and the mechanism mounting ear plate.

[0011] In some embodiments, the top rim of the supporting pulley is set to be not lower than the central axis of the boom body.

[0012] In some embodiments, the boom body is provided with a second boom ear plate, the support pulley includes a pulley support, and the boom assembly includes a second connecting assembly for connecting and fixing the second boom ear plate and the pulley support.

[0013] In some embodiments, the boom body includes a tip section and a main boom section. The tail of the tip section is connected to the head of the main boom section. The boom assembly further includes a guide pulley and a hoisting pulley disposed in the tip section. The guide pulley is disposed above the hoisting pulley, and the hoisting rope is sequentially arranged around the support pulley, the guide pulley, and the hoisting pulley.

[0014] In some embodiments, the guide pulley is disposed at a position at the same horizontal height as the support pulley.

[0015] In some embodiments, the boom assembly further includes a load limiter disposed in the tip section for detecting the hoisting weight of the hoisting rope, and the guide pulley is formed as the limiter pulley of the load limiter.

[0016] The second aspect of the present application provides a crane, including the above-mentioned boom assembly.

[0017] Through the above technical solutions, the boom assembly of the present application arranges the hoisting mechanism inside the boom body and routes the rope inside the boom body, thereby effectively reducing the risk of interference between the hoisting rope and other structural components of the crane. Importantly, when the crew needs to repair the hoisting mechanism and the hoisting rope, they only need to enter the inside of the boom body, which greatly improves the safety of high-altitude operations. In addition, compared with the prior art, there is no need to arrange the hoisting mechanism on the counterweight boom, so the layout space of the counterweight boom can be saved, the length of the counterweight boom can be effectively reduced, that is, the slewing radius of the counterweight boom is reduced, and the overall flexibility of the crane is improved.

[0018] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific embodiment part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts. In the drawings:

[0020] Figure 1 is a schematic diagram of a boom assembly in a specific embodiment of the present application;

[0021] Figure 2 Schematic diagram of the hoisting mechanism of the boom assembly of Figure 1 Figure 1 when installed on the boom body;

[0022] Figure 3 Schematic diagram of the support pulley of the boom assembly of Figure 1 Figure 1 when installed on the boom body;

[0023] Figure 4 Schematic diagram of the tip section of the boom body of the boom assembly of Figure 1 Figure 1 ;

[0024] Description of the reference numerals in the drawings

[0025] 1 Boom body 2 Hoisting mechanism

[0026] 3 Support pulley 4 First connecting component

[0027] 5 Second connecting component 6 Guide pulley

[0028] 7 Hoisting pulley 8 Lifting capacity limiter

[0029] 9 Hook 101 Boom body cavity

[0030] 102 Root section of the boom 103 Main boom section

[0031] 104 Tip section of the boom 201 Hoisting rope

[0032] 202 Mechanism mounting ear plate 301 Pulley support

[0033] 801 Limiter pulley 1041 Tip cavity Detailed implementation manners

[0034] The following describes in detail the specific implementation manners of the present application with reference to the drawings. It should be understood that the specific implementation manners described herein are only for explaining and understanding the present application, and are not used to limit the present application.

[0035] The present application will be described in detail below with reference to the drawings and in conjunction with exemplary embodiments.

[0036] As Figures 1 to 4 shown, the first exemplary embodiment of the present application provides a boom assembly, which mainly includes a boom body 1, a hoisting mechanism 2 and a support pulley 3. Among them, the boom body 1 can be as Figure 1The shown truss boom can also be a box boom. An arm body cavity 101 is formed inside the boom body 1. The hoisting mechanism 2 is arranged in the arm body cavity 101, specifically, it can be arranged on the internal web members of the boom body 1. The hoisting mechanism 2 includes a hoisting rope 201 extending along the length direction of the arm body cavity 101. The free end of the hoisting rope 201, that is, the end extending beyond the arm body cavity 101, is connected to a hook 9 for hoisting goods. The main body of the hoisting mechanism 2 is equivalent to a winch, which is used to wind in and out the hoisting rope 201, so as to hoist goods. The supporting pulley 3 is arranged in the arm body cavity 101, specifically, it can be arranged on the internal web members of the boom body 1. The supporting pulley 3 is used to support the hoisting rope 201 walking in the arm body cavity 101, so that the extending direction of the hoisting rope 201 is roughly parallel to the length direction of the boom body 1, thereby preventing the hoisting rope 201 from sagging and touching the lower chord or web members of the boom body 1, and preventing the hoisting rope 201 from being worn.

[0037] It can be seen that the boom assembly of this exemplary embodiment effectively reduces the risk of interference between the hoisting rope 201 and other structural members of the crane by arranging the hoisting mechanism 2 inside the boom body 1 and routing the rope inside the boom body 1. Importantly, when the crew needs to repair the hoisting mechanism 2 and the hoisting rope 201, they only need to enter the inside of the boom body 1, which greatly improves the safety of high-altitude operations. In addition, compared with the prior art, there is no need to arrange the hoisting mechanism 2 on the counterweight boom, so the layout space of the counterweight boom can be saved, the length of the counterweight boom can be effectively reduced, that is, the slewing radius of the counterweight boom is reduced, and the overall flexibility of the crane is improved. Moreover, when the boom assembly needs to be transported, the hoisting mechanism 2 does not need to be disassembled, and it can be placed on the transport vehicle together with the boom body 1, so the disassembly and reinstallation processes of the hoisting mechanism 2 can be omitted, and the workpiece transfer and assembly efficiency can be improved.

[0038] If it is necessary to configure two hoisting mechanisms in a crane, one hoisting mechanism can be arranged on the counterweight boom and the other hoisting mechanism can be arranged in the boom body 1, so that the lifting operations of the two do not interfere with each other.

[0039] In an alternative or preferred embodiment, as Figure 1 shown, the boom body 1 includes a root boom section 102 and a main boom section 103. Among them, the head of the root boom section 102 is connected to the tail of the main boom section 103. The tail of the root boom section 102 is generally used for hinging on the crane slewing platform. The arm body cavity 101 is formed in the main boom section 103. Thus, in the case where the boom body 1 is provided with the root boom section 102, by arranging the hoisting mechanism 2 inside the main boom section 103, the adverse influence of the weight of the hoisting mechanism 2 on the force of the boom body 1 can be reduced.

[0040] Further, in some other embodiments, there are multiple main arm sections 103, and the multiple main arm sections 103 are connected end to end in sequence. In this case, the hoisting mechanism 2 is arranged in the arm body cavity 101 of one of the main arm sections 103 connected to the arm root section 102 among the multiple main arm sections 103, so as to further reduce the adverse influence of the weight of the hoisting mechanism 2 on the force borne by the hoisting arm body 1. Of course, when the structural strength of the hoisting arm body 1 can be ensured to be sufficient, the hoisting mechanism 2 can also be arranged in other main arm sections 103, and the present application does not limit this.

[0041] In an alternative or preferred embodiment, as Figure 2 shown, the hoisting arm body 1 is provided with a first arm body ear plate (not shown in the drawings), the bottom of the hoisting mechanism 2 is provided with a mechanism mounting ear plate 202, and the hoisting arm assembly includes a first connecting assembly 4 for connecting and fixing the first arm body ear plate and the mechanism mounting ear plate 202. Thus, when installing the hoisting mechanism 2, the mechanism mounting ear plate 202 can be butted against the first arm body ear plate, and then the two can be connected and fixed by using the first connecting assembly 4, so as to improve the stability of the hoisting mechanism 2. The first connecting assembly 4 can be a detachable pin shaft, so as to facilitate the disassembly of the hoisting mechanism 2.

[0042] In an alternative or preferred embodiment, as Figure 1 shown, the supporting pulley 3 is installed on the internal web member of the hoisting arm body 1, and the top rim of the supporting pulley 3 is set to be not lower than the central axis of the hoisting arm body 1, so that the hoisting rope 201 supported by the supporting pulley 3 can be not lower than the central axis of the hoisting arm body 1, thereby reducing or even eliminating the adverse influence of the hoisting rope 201 on the structural force of the hoisting arm body 1 during the hoisting operation.

[0043] In an alternative or preferred embodiment, as Figure 3 shown, the hoisting arm body 1 is provided with a second arm body ear plate (not shown in the drawings), the supporting pulley 3 includes a pulley support 301, and the hoisting arm assembly includes a second connecting assembly 5 for connecting and fixing the second arm body ear plate and the pulley support 301. Thus, when installing the supporting pulley 3, the pulley support 301 can be butted against the second arm body ear plate, and then the two can be connected and fixed by using the second connecting assembly 5, so as to improve the stability of the supporting pulley 3. The second connecting assembly 5 can be a detachable pin shaft, so as to facilitate the disassembly of the supporting pulley 3 for maintenance.

[0044] In an alternative or preferred embodiment, as Figure 4As shown in the figure, the boom body 1 includes a tip section 104 and a main boom section 103. The tail of the tip section 104 is connected to the head of the main boom section 103. The boom assembly further includes a guide pulley 6 and a hoisting pulley 7 disposed in the tip section 104. The hoisting rope 201 is sequentially arranged around the support pulley 3, the guide pulley 6, and the hoisting pulley 7. Among them, the guide pulley 6 is disposed above the hoisting pulley 7. After the hoisting rope 201 extending in the boom cavity 101 bypasses the guide pulley 6, the free end of the hoisting rope 201 turns downward and presses against the rim of the hoisting pulley 7.

[0045] In this embodiment, an inner tip cavity 1041 is formed inside the tip section 104. The guide pulley 6 is disposed in the tip cavity 1041 and at the same horizontal height as the support pulley 3, so that after the hoisting rope 201 bypasses the support pulley 3, it can extend horizontally to the guide pulley 6, ensuring the force balance of the boom body 1.

[0046] In an alternative or preferred embodiment, as Figure 4 shown, the boom assembly further includes a load limiter 8 disposed in the tip section 104 and used to detect the hoisting weight of the hoisting rope 201. The above-mentioned guide pulley 6 is formed as a limiter pulley 801 of the load limiter 8. In other words, the limiter pulley 801 can not only guide the hoisting rope 201 but also detect the downward pressure of the hoisting rope 201, so that the load limiter 8 can measure the weight of the goods lifted by the hoisting rope 201. Thus, by setting the load limiter 8, the load condition of the crane can be monitored in real time. Once it is detected that the load exceeds the set safety value, the system will automatically issue an alarm or stop the operation of the equipment, thereby avoiding equipment damage or accidents caused by overloading and improving safety.

[0047] The second exemplary embodiment of the present application provides a crane, which includes the above-mentioned boom assembly. Obviously, the crane of this exemplary embodiment has all the technical effects brought by the above-mentioned boom assembly, so it will not be elaborated here.

[0048] It should be noted that the crane of this exemplary embodiment can be a tower crane with a counterweight boom. By arranging the hoisting mechanism 2 in the boom body 1 of the boom assembly, the spatial layout of the counterweight boom can be optimized, the length setting requirement of the counterweight boom can be reduced, and its slewing radius can be reduced, so that the boom body 1 can slew more flexibly.

[0049] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] In the present application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0051] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A boom assembly, characterized in that: include: A lifting arm body (1), wherein an arm body cavity (101) is formed inside the lifting arm body (1); A lifting mechanism (2) is arranged in the arm body cavity (101) and comprises a lifting rope (201) extending along the length direction of the arm body cavity (101); and A supporting pulley (3) is arranged in the arm body cavity (101) and is used to support the lifting rope (201).

2. The boom assembly according to claim 1, characterized in that: The lifting arm body (1) comprises an arm root section (102) and a main arm section (103); the head of the arm root section (102) is connected to the tail of the main arm section (103); and the arm body cavity (101) is formed in the main arm section (103).

3. The boom assembly according to claim 2, characterized in that: The main boom sections (103) are provided in plurality, and the plurality of main boom sections (103) are connected end to end in sequence, and the lifting mechanism (2) is arranged in the arm body cavity (101) of one of the main boom sections (103) connected to the arm root section (102) among the plurality of main boom sections (103).

4. The boom assembly according to claim 1, characterized in that: The lifting arm body (1) is provided with a first arm body ear plate, the bottom of the lifting mechanism (2) is provided with a mechanism mounting ear plate (202), and the lifting arm assembly comprises a first connecting component (4) for connecting and fixing the first arm body ear plate and the mechanism mounting ear plate (202).

5. The boom assembly according to claim 1, characterized in that: The top wheel rim of the supporting pulley (3) is arranged to be no lower than the central axis of the boom body (1).

6. The boom assembly according to claim 1, characterized in that: The boom body (1) is provided with a second boom body ear plate, the supporting pulley (3) comprises a pulley support (301), and the boom assembly comprises a second connecting component (5) for connecting and fixing the second boom body ear plate and the pulley support (301).

7. The boom assembly according to claim 1, characterized in that: The lifting arm body (1) comprises a boom tip section (104) and a main boom section (103), the tail of the boom tip section (104) is connected to the head of the main boom section (103), the lifting arm assembly also comprises a guide pulley (6) and a lifting pulley (7) arranged in the boom tip section (104), the guide pulley (6) is arranged above the lifting pulley (7), and the lifting rope (201) is arranged to pass through the supporting pulley (3), the guide pulley (6) and the lifting pulley (7) in sequence.

8. The boom assembly according to claim 7, characterized in that: The guide pulley (6) is arranged at a position at the same horizontal height as the supporting pulley (3).

9. The boom assembly according to claim 7, characterized in that: The lifting arm assembly also includes a lifting weight limiter (8) arranged in the arm tip section (104) and used to detect the lifting weight of the lifting rope (201), and the guide pulley (6) is formed as a limiter pulley (801) of the lifting weight limiter (8).

10. A crane, characterized in that: Comprising a boom assembly according to any one of claims 1 to 9.

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