Crane boom and crane

Abstract

This invention relates to a crane boom head and a crane, wherein the crane boom head includes a boom head body (10) and a first pulley assembly (20). The boom head body (10) includes a connecting part (11) for connecting to an extension arm. The first pulley assembly (20) is mounted on the boom head body (10), and a preset distance is maintained between the first pulley assembly (20) and the connecting part (11) to avoid interference between the first pulley assembly (20) and the extension arm. The crane includes the aforementioned crane boom head. This invention enables integrated transportation of the pulley structure and the crane boom head, reducing transportation costs. By maintaining a preset distance between the first pulley assembly and the connecting part, interference between the first pulley assembly and the extension arm can be avoided. When the crane needs to install an extension arm, there is no need to disassemble and assemble the pulley structure, saving the crane's disassembly and assembly time. Furthermore, the function of the pulley structure is retained for future use, thereby improving the crane's operating efficiency.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a crane boom and a crane. Background Technology

[0002] With rapid economic development and accelerated urbanization, infrastructure projects are becoming increasingly large-scale, leading to the rapid development of crawler cranes due to their superior performance. To meet the needs of different construction scenarios, the types of crawler crane booms are increasing, and boom combinations are becoming more diverse. This has resulted in increased transportation costs and more complex assembly and disassembly processes. Therefore, reducing boom transportation costs and improving boom assembly and disassembly efficiency are of great significance in the design and use of crawler cranes.

[0003] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the overall background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] This invention provides a crane boom head and a crane, which can reduce the transportation cost of the crane boom.

[0005] According to one aspect of the present invention, a crane boom head is provided, comprising:

[0006] Arm head body, including a connecting part for connecting to an extension arm; and

[0007] The first pulley assembly is installed on the arm head body. The first pulley assembly and the connecting part are separated by a preset distance to avoid interference between the first pulley assembly and the extension arm.

[0008] In some embodiments, the crane boom head further includes a second pulley assembly connected to the boom head body. The second pulley assembly is disposed between the connecting portion and the first pulley assembly. The first pulley assembly is configured to lift a first weight, and the second pulley assembly is configured to lift a second weight, wherein the first weight is less than the second weight.

[0009] In some embodiments, the first pulley assembly includes a support and a pulley, the support being connected to the arm head body, and the pulley being rotatably connected to the support.

[0010] In some embodiments, the support member and the arm head body are integrally formed.

[0011] In some embodiments, the support member includes two support rods, which are respectively mounted on the arm head body. The pulley is provided with a first connecting hole, and the support rods are provided with second connecting holes. The first pulley assembly also includes a connecting shaft, which passes through the first connecting hole and the two second connecting holes to connect the pulley and the two support rods, and to make the pulley rotatable relative to the two support rods.

[0012] In some embodiments, the support rod has an L-shaped structure, with both ends connected to the arm head body, and the portion of the support rod used to connect the connecting shaft protrudes outward relative to the arm head body; or, the support rod has a straight structure, with both ends connected to the arm head body, so that the pulley is at least partially located inside the arm head body.

[0013] In some embodiments, the first pulley assembly is detachably connected to the arm head body.

[0014] In some embodiments, the first pulley assembly is welded to the arm head body.

[0015] In some embodiments, the connecting portion is disposed at the end of the arm head body.

[0016] According to another aspect of the invention, a crane is provided, comprising the crane boom described above.

[0017] Based on the above technical solution, the present invention installs the first pulley assembly on the boom head body. Compared with the related technology where the crane boom head and boom end pulley are set as two independent boom sections and transported separately, the present invention can realize the integrated transportation of the pulley structure and the crane boom head, thereby reducing transportation costs. In addition, by setting a preset distance between the first pulley assembly and the connecting part used to connect with the extension boom, interference between the first pulley assembly and the extension boom can be avoided. Therefore, when the crane needs to install the extension boom, compared with the related technology which requires disassembling the boom end pulley before installing the extension boom, the present invention does not require disassembly and assembly of the pulley structure, which can significantly save the crane's disassembly and assembly time. Furthermore, when the crane is connected to the extension boom, the function of the pulley structure is retained for backup, thereby greatly improving the crane's operating efficiency. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 A schematic diagram of the structure of one embodiment of the crane boom head of the present invention is shown;

[0020] Figure 2A schematic diagram of another embodiment of the crane boom head of the present invention is shown.

[0021] In the figure: 10, arm head body; 11, connecting part; 20, first pulley assembly; 21, support rod; 22, pulley; 30, second pulley assembly. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0024] In related technologies, the crane boom head and boom end pulley are two independent boom sections that need to be transported separately. When the boom end pulley is needed, it must be installed onto the crane boom head using auxiliary cranes or other tools. When it is not needed, it must be removed. The entire assembly and disassembly process requires a very high degree of accuracy, is time-consuming and labor-intensive, resulting in very low assembly and disassembly efficiency.

[0025] like Figure 1 As shown, in some embodiments, the crane boom provided by the present invention includes a boom body 10 and a first pulley assembly 20. The boom body 10 includes a connecting part 11 for connecting with an extension arm. The first pulley assembly 20 is mounted on the boom body 10. The first pulley assembly 20 and the connecting part 11 are separated by a preset distance to avoid interference between the first pulley assembly 20 and the extension arm.

[0026] This invention mounts the first pulley assembly 20 onto the boom head body 10, thus providing a composite crane boom head that also functions as a pulley. Compared to related technologies where the crane boom head and boom end pulleys are set as two independent boom sections and transported separately, this invention enables integrated transport of the pulley structure and the crane boom head, thereby reducing transportation costs. Furthermore, by maintaining a predetermined distance between the first pulley assembly 20 and the connecting part 11 for connection with the extension boom, interference between the first pulley assembly 20 and the extension boom can be avoided, ensuring that the first pulley assembly 20 does not interfere with the installation and function of the extension boom. Under the premise that the implementation is affected, the position of the first pulley assembly 20 can be adjusted according to the actual structure of the crane boom. It can be any reasonable position that is far away from the connecting part 11 and can realize the function of the first pulley assembly 20. In the case where the crane needs to install an extension boom, compared with the relevant technology that requires disassembling the boom end pulley before installing the extension boom, the present invention does not require disassembly and assembly of the pulley structure, which can significantly save the disassembly and assembly time of the crane. Furthermore, in the case where the crane is connected to an extension boom, the function of the pulley structure is retained for backup, thereby greatly improving the operating efficiency of the crane.

[0027] like Figure 1 As shown, in some embodiments, the crane boom head also includes a second pulley assembly 30 connected to the boom head body 10. The second pulley assembly 30 is disposed between the connecting portion 11 and the first pulley assembly 20. The first pulley assembly 20 is configured to lift a first weight, and the second pulley assembly 30 is configured to lift a second weight, wherein the first weight is less than the second weight.

[0028] In related technologies, boom-end pulley devices are typically used to achieve rapid lifting of smaller loads. In the above embodiment, the present invention provides a first pulley assembly 20 for lifting a first weight (i.e., achieving rapid lifting of a smaller load), and a second pulley assembly 30 connected to the boom head body 10 for lifting a second weight (i.e., achieving lifting of a larger load). The structural strength of the second pulley assembly 30 is greater than that of the first pulley assembly 20. Therefore, during crane operation, when the load to be lifted is small, the first pulley assembly 20 can be used directly to lift the load, ensuring high lifting efficiency; while when the load to be lifted is large, the second pulley assembly 30 is used to lift the load to ensure lifting reliability and effectively expand the crane's load operating range to meet different lifting requirements.

[0029] like Figure 1 As shown, in some embodiments, the first pulley assembly 20 includes a support and a pulley 22, the support being connected to the arm head body 10, and the pulley 22 being rotatably connected to the support.

[0030] In the above embodiments, the support member and the boom head body 10 can be connected by welding, riveting, bolting, or other methods. The support member can be directly connected to the existing connecting rods on the boom head body 10; in this case, the size of the support member can be flexibly designed with reference to the structure of the connecting rods on the boom head body 10. Alternatively, it can be... Figure 1 and Figure 2 As shown, a connecting rod for installing the support is added to the arm head body 10 as needed, and the support is further fixed between the upper and lower connecting rods.

[0031] In some embodiments, the support member and the arm head body 10 are integrally formed.

[0032] By making the support component and the boom head body 10 integrally molded, the manufacturing process of the crane boom head can be simplified, eliminating the need for separate installation of the support component, saving time and reducing costs, and effectively ensuring the stability and reliability of the first pulley assembly 20 during operation.

[0033] like Figure 1 and Figure 2 As shown, in some embodiments, the support includes two support rods 21, which are respectively mounted on the arm head body 10. The pulley 22 is provided with a first connecting hole, and the support rods 21 are provided with second connecting holes. The first pulley assembly 20 also includes a connecting shaft, which passes through the first connecting hole and the two second connecting holes to connect the pulley 22 and the two support rods 21, and makes the pulley 22 rotatable relative to the two support rods 21.

[0034] like Figure 1 As shown, in some embodiments, the support rod 21 has an L-shaped structure, with both ends of the support rod 21 connected to the arm head body 10, and the portion of the support rod 21 used to connect the connecting shaft protruding outward relative to the arm head body 10.

[0035] Specifically, the support rod 21 includes a first leg and a second leg. The first leg and the second leg are respectively connected to the arm head body 10, and the first leg, the second leg and the arm head body 10 are connected to form a triangular structure, thereby improving the stability of the connection between the first pulley assembly 20 and the arm head body 10.

[0036] like Figure 2 As shown, in some embodiments, the support rod 21 has a straight structure, and both ends of the support rod 21 are connected to the arm head body 10, so that the pulley 22 is at least partially located inside the arm head body 10.

[0037] Specifically, the support rod 21 is a long, narrow, straight plate structure. Both ends of the straight plate structure are connected to connecting rods on the boom head body 10, thereby fixing the first pulley assembly 20 between the two connecting rods. This arrangement allows the first pulley assembly 20 to be at least partially concealed inside the boom head body 10, effectively preventing collisions or interference between the first pulley assembly 20 and other components, and also facilitating the storage and transportation of the crane boom head.

[0038] In the above embodiment, the second connecting hole is located at the center of the pulley 22. Wherein, as... Figure 1 As shown, in an embodiment where the support rod 21 has an L-shaped structure, the first connecting hole is located at the connection between the first supporting leg and the second supporting leg, as illustrated. Figure 2 As shown, in an embodiment where the support rod 21 has a straight-line structure, the first connecting hole is located in the middle of the length direction of the straight plate-shaped structure.

[0039] like Figure 1 As shown, in some embodiments, the first pulley assembly 20 is detachably connected to the arm head body 10.

[0040] By making the first pulley assembly 20 and the boom head body 10 detachably connected, it is convenient to adjust the installation position of the first pulley assembly 20 on the boom head body 10 according to the actual working conditions, and it is also convenient to carry out subsequent maintenance and replacement of the first pulley assembly 20.

[0041] like Figure 1 As shown, in some embodiments, the first pulley assembly 20 is welded to the arm head body 10.

[0042] In related technologies, prefabricated boom-end pulleys are commonly used. However, to ensure the reliability of crane operation, the machining accuracy requirements for the pin connection holes between the boom-end pulley and the boom head are very high, making machining extremely difficult. Furthermore, when using the boom-end pulley, it is necessary to assemble it with the boom head first. During the assembly process, a crane is required to assist in lifting the boom-end pulley to the connection position with the boom head and aligning it with the boom head and the corresponding pin connection hole. This alignment of the boom head and the corresponding pin connection hole takes a considerable amount of time, and manufacturing errors may lead to alignment failure. After the boom head and the corresponding pin connection hole are aligned, the boom head and the boom-end pulley need to be connected using connecting pins. The entire process involves many steps and is very difficult, significantly reducing the efficiency of the construction process. When other extended booms are needed, the boom end pulleys are installed close to the installation interfaces of other extended booms such as the tower and jib. In order to avoid interference between the boom end pulleys and other extended booms, the boom end pulleys need to be removed first. The removal process also requires a lot of manpower and resources.

[0043] The present invention connects the first pulley assembly 20 to the arm head body 10 by welding, which reduces the difficulty of the structure production and processing, ensures the stability and reliability of the overall structure, and eliminates the complicated operation of assembling and disassembling the pulley structure, which helps to save labor and time costs.

[0044] like Figure 1 As shown, in some embodiments, the connecting part 11 is provided at the end of the arm head body 10.

[0045] By placing the connecting part 11 at the end of the boom head body 10, it is convenient for operators to install the extended boom, and it can also minimize the interference between the extended boom and other structures of the crane.

[0046] In some embodiments, the connecting part 11 and the extension arm can be connected by means of hinge, pin connection, bolt connection or other means.

[0047] like Figure 1 As shown, in some embodiments, the connecting portion 11 is provided with a third connecting hole for connecting with the extension arm.

[0048] The structure of one embodiment of the crane boom head of the present invention is described below:

[0049] like Figure 1 As shown, the crane boom head provided by the present invention includes a boom head body 10, a first pulley assembly 20, and a second pulley assembly 30. The boom head body 10 includes a connecting portion 11 for connecting with an extension arm. The connecting portion 11 is disposed at the end of the boom head body 10 and has a third connecting hole for connecting with the extension arm. The first pulley assembly 20 is mounted on the boom head body 10, and the second pulley assembly 30 is disposed between the connecting portion 11 and the first pulley assembly 20. The first pulley assembly 20 and the connecting portion 11 are separated by a preset distance to avoid interference between the first pulley assembly 20 and the extension arm.

[0050] The first pulley assembly 20 includes a pulley 22 and a support member. The support member includes two support rods 21 respectively disposed on both sides of the pulley 22. The support rods 21 have an L-shaped structure and include a first leg and a second leg. The first leg and the second leg are respectively connected to the arm head body 10, and the first leg, the second leg, and the arm head body 10 are connected to form a triangular structure. The first pulley assembly 20 also includes a connecting shaft. A first connecting hole is provided at the connection between the first leg and the second leg, and a second connecting hole is provided at the center of the pulley 22. The connecting shaft passes through the first connecting hole and the two second connecting holes to connect the pulley 22 and the two support rods 21, so that the pulley 22 can rotate relative to the two support rods 21.

[0051] When a small load needs to be lifted quickly, the first pulley assembly 20 can be used directly to lift the load to ensure high lifting efficiency; when a larger load needs to be lifted, the second pulley assembly 30 is used to lift the load, thereby ensuring the reliability of the lifting.

[0052] Through the description of several embodiments of the crane boom head of the present invention, it can be seen that the crane boom head of the present invention integrates the structure and function of the boom end pulley, enabling integrated transportation of the pulley structure and the crane boom head, thereby reducing transportation costs. Furthermore, the pulley structure does not need to be disassembled during operation, which can significantly save the crane's operating time. Moreover, when the crane is connected to an extended boom, the function of the boom end pulley structure can be retained at the same time, which helps to improve the crane's operating efficiency. In addition, the crane boom head of the present invention is also provided with a first pulley assembly and a second pulley assembly for lifting different loads, thereby effectively expanding the crane's load operating range and meeting different lifting requirements.

[0053] Based on the crane boom described above, the present invention also proposes a crane including the aforementioned crane boom. The positive technical effects of the crane boom in the various embodiments described above are also applicable to the crane, and will not be repeated here.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can still be made to some technical features without departing from the principle of the present invention, and such modifications and equivalent substitutions should all be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A crane jib head, characterized in that, include: The arm head body (10) includes a connecting part (11), which is disposed at the end of the arm head body (10) and is used to connect with the extension arm; A first pulley assembly (20) is mounted on the arm head body (10). A preset distance is maintained between the first pulley assembly (20) and the connecting portion (11) to avoid interference between the first pulley assembly (20) and the extended arm. The first pulley assembly (20) includes a support member and a pulley (22). The support member is connected to the arm head body (10), and the pulley (22) is rotatably connected to the support member. The support member and the arm head body (10) are integrally formed. The second pulley assembly (30) is connected to the arm head body (10). The second pulley assembly (30) is disposed between the connecting part (11) and the first pulley assembly (20). The first pulley assembly (20) is configured to lift a first weight, and the second pulley assembly (30) is configured to lift a second weight. The first weight is less than the second weight. The first pulley assembly (20), the second pulley assembly (30) and the connecting part (11) are arranged sequentially at intervals along the length direction of the arm head body (10).

2. A crane boom head according to claim 1, characterised in that The support includes two support rods (21), which are respectively mounted on the arm head body (10). The pulley (22) is provided with a first connecting hole, and the support rod (21) is provided with a second connecting hole. The first pulley assembly (20) also includes a connecting shaft, which passes through the first connecting hole and the two second connecting holes to connect the pulley (22) and the two support rods (21), and makes the pulley (22) rotatable relative to the two support rods (21).

3. The crane boom head according to claim 2, characterized in that, The support rod (21) has an L-shaped structure, with both ends of the support rod (21) connected to the arm head body (10) respectively, and the part of the support rod (21) used to connect the connecting shaft protrudes outward relative to the arm head body (10); or, the support rod (21) has a straight structure, with both ends of the support rod (21) connected to the arm head body (10) respectively, so that the pulley (22) is at least partially located inside the arm head body (10).

4. A crane, characterized in that, Including the crane boom head as described in any one of claims 1 to 3.

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