A snake-shaped multi-section crane arm

Abstract

This invention discloses a serpentine multi-section boom. The first perforated plate of the first upper connector is connected to a support column, and the first perforated plates of the remaining upper connectors are located on and rotatably connected to the second perforated plate of the preceding upper connector. The second perforated plate of the last upper connector is connected to a lifting device connector, and the second perforated plates of the remaining upper connectors are located below and rotatably connected to the first perforated plate of the following upper connector. The third perforated plate of the first lower connector is connected to the support column, and the third perforated plates of the remaining lower connectors are located on and rotatably connected to the fourth perforated plate of the preceding upper connector. The fourth perforated plate of the last lower connector is connected to the lifting device connector, and the fourth perforated plates of the remaining lower connectors are located below and rotatably connected to the third perforated plate of the following lower connector. The boom sections can rotate axially, making it suitable for multi-directional lifting operations in limited space, offering high flexibility. Furthermore, the boom connectors and boom column are easy to install and disassemble, resulting in low maintenance and replacement costs.

Description

Technical Field

[0001] This invention relates to a boom, specifically a serpentine multi-section boom. Background Technology

[0002] Most existing crane booms fall into three categories: fixed-length boom, extended-length truck-mounted boom, and telescopic boom. Fixed-length boom booms use a truss boom of fixed length, welded from angle steel and steel plates, in a folding boom shape to increase the lifting radius. Extended-length truck-mounted booms are also truss structures, consisting of several boom sections, including a main boom, top boom, and insert boom, which can be adjusted in length when the machine is stopped as needed. Telescopic boom booms are composed of multiple box-section boom sections that are stacked on top of each other. Using hydraulic cylinders installed inside the boom, they can be extended or retracted simultaneously or section by section. When fully retracted, the boom is shortest and can have the maximum lifting capacity; when fully extended, the boom is longest and can have the maximum lifting height or working radius. This type has now become the main type of small and medium tonnage truck crane.

[0003] The aforementioned boom is not only complex in structure, but can only rotate around the column, which is not flexible enough. Furthermore, the boom is inconvenient to install and disassemble. When a section of the boom is damaged or deformed, the entire long section of the boom needs to be replaced, which is difficult and costly to repair. Summary of the Invention

[0004] Based on the above, the present invention discloses a serpentine multi-section boom, including a support column, a lifting device connector, multiple upper connectors and multiple lower connectors; the multiple upper connectors are arranged in sequence, and the multiple lower connectors are arranged in sequence.

[0005] The upper connector includes a first perforated plate and a second perforated plate, the first perforated plate and the second perforated plate are fixedly connected; the first perforated plate of the first upper connector is connected to the support column, the first perforated plate of the remaining upper connectors is rotatably connected to the second perforated plate of the preceding upper connector; the second perforated plate of the last upper connector is connected to the lifting device connector, the second perforated plate of the remaining upper connectors is rotatably connected to the first perforated plate of the following upper connector.

[0006] The lower connector includes a third hole plate and a fourth hole plate, which are fixedly connected. The third hole plate of the first lower connector is connected to the support column, and the third hole plates of the remaining lower connectors are rotatably connected to the fourth hole plate of the previous lower connector. The fourth hole plate of the last lower connector is connected to the lifting device connector, and the fourth hole plates of the remaining lower connectors are rotatably connected to the third hole plate of the next lower connector.

[0007] The multi-section boom formed by so many upper and lower connectors can be bent in the horizontal direction, and the length of the boom can be adjusted by adding or removing connectors as needed.

[0008] Furthermore, the number of upper connectors and lower connectors are equal, and a boom is provided between the upper and lower connectors. The boom can increase the load-bearing capacity of the boom.

[0009] Furthermore, the first and second perforated plates of the upper connector are fixedly connected with a staggered vertical alignment, with the height of the first perforated plate being higher than that of the second perforated plate, forming a stepped shape; the first perforated plate of the first upper connector is rotatably connected to the support column, and the first perforated plates of the remaining upper connectors are located above the second perforated plate of the preceding upper connector; the second perforated plate of the last upper connector is rotatably connected to the lifting device connector, and the second perforated plates of the remaining upper connectors are located below the first perforated plate of the following upper connector; when multiple upper connectors are arranged in sequence, they can be located on the same horizontal plane.

[0010] The third and fourth perforated plates of the lower connector are located on the same horizontal plane and are integrally connected. The third perforated plate of the first lower connector is rotatably connected to the support column, and the third perforated plates of the remaining lower connectors are located above the fourth perforated plate of the previous lower connector. The fourth perforated plate of the last lower connector is rotatably connected to the lifting device connector, and the fourth perforated plates of the remaining lower connectors are located below the third perforated plate of the next lower connector. When multiple lower connectors are arranged in this way, the height increases sequentially.

[0011] The arrangement of multiple upper connectors, multiple lower connectors, and multiple boom columns creates a right-angled trapezoidal boom, providing it with a certain degree of stability. The lengths of the multiple boom columns also decrease sequentially, reducing the weight of the boom itself.

[0012] Preferably, the connection points of the first and second perforated plates of the upper connector and the connection points of the third and fourth perforated plates of the lower connector are each provided with connecting holes. Connecting posts are provided at both the upper and lower ends of the arm post, with the diameter of the connecting post being smaller than the diameter of the arm post and integrally connected to it. The connecting post at the upper end of the arm post is inserted into the corresponding connecting hole of the upper connector, and the connecting post at the lower end of the arm post is inserted into the corresponding connecting hole of the lower connector. This connection method allows for convenient installation or disassembly and replacement of the arm post.

[0013] Preferably, the rotating connection is made by inserting a pin. The end of the pin has a pin hole, into which a cotter pin is inserted to install the pin and prevent it from falling off. The pin is also equipped with a bearing to make rotation more flexible. The pin connection method makes it easier to disassemble and assemble the connecting parts.

[0014] Through the above technical solutions, the present invention has at least the following beneficial effects:

[0015] The aforementioned serpentine multi-section boom can bend horizontally, making it suitable for lifting in more directions and offering high flexibility. Furthermore, the connectors and boom columns of the serpentine multi-section boom are easy to install and disassemble, allowing for convenient adjustment of the boom length or replacement of damaged or deformed parts, resulting in low maintenance and replacement costs. The boom column configuration increases the boom's load-bearing capacity, and the progressively decreasing length of the multiple boom columns reduces the boom's weight. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the serpentine multi-section boom described in the embodiments of this application;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0019] Figure 4 This is an anatomical diagram of the arm column, upper connector, and lower connector in an embodiment of this application;

[0020] Figure 5 This is a schematic diagram of the structure of the rotating connection of the connector in an embodiment of this application;

[0021] Explanation of reference numerals in the attached drawings: 1 Support column, 2 Lifting device connector, 3 Upper connector, 301 First hole plate, 302 Second hole plate, 4 Lower connector, 403 Third hole plate, 404 Fourth hole plate, 34 Connecting hole, 5 Arm column, 6 Connecting column, 7 Pin, 8 Cotter pin, 9 Bearing. 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. In the description of this application, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", 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 the present 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Reference Figure 1 A serpentine multi-section boom includes a support column 1, a lifting device connector 2, multiple upper connectors 3, multiple lower connectors 4, and multiple boom columns 5; the multiple upper connectors 3 are arranged in sequence, and the multiple lower connectors 4 are arranged in sequence.

[0025] Reference Figure 2 and Figure 3 The upper connecting member 3 includes a first perforated plate 301 and a second perforated plate 302. The first perforated plate 301 and the second perforated plate 302 are fixedly connected with each other vertically offset. The height of the first perforated plate 301 is higher than the height of the second perforated plate 302, forming a stepped structure. The first perforated plate 301 of the first upper connecting member 3 is rotatably connected to the support column 1. The first perforated plates 301 of the remaining upper connecting members 3 are located above the second perforated plate 302 of the preceding upper connecting member 3 and are rotatably connected to the second perforated plate 302 of the preceding upper connecting member 3. The second perforated plate 302 of the last upper connecting member 3 is rotatably connected to the lifting device connecting member 2. The second perforated plates 302 of the remaining upper connecting members 3 are located below the first perforated plate 301 of the following upper connecting member 3 and are rotatably connected to the first perforated plate 301 of the following upper connecting member 3. After this connection, multiple upper connecting members 3 can be arranged sequentially on the same horizontal plane.

[0026] Reference Figure 2 and Figure 3 The lower connecting member 4 includes a third perforated plate 403 and a fourth perforated plate 404, which are located on the same horizontal plane and integrally connected. The third perforated plate 403 of the first lower connecting member 4 is rotatably connected to the support column 1, and the third perforated plates 403 of the remaining lower connecting members 4 are located above the fourth perforated plate 404 of the previous lower connecting member 4 and are rotatably connected to the fourth perforated plate 404 of the previous lower connecting member 4. The fourth perforated plate 404 of the last lower connecting member 4 is rotatably connected to the lifting device connecting member 2, and the fourth perforated plates 404 of the remaining lower connecting members 4 are located below the third perforated plate 403 of the next lower connecting member 4 and are rotatably connected to the third perforated plate 403 of the next lower connecting member 4. When multiple lower connecting members 4 are arranged in this manner, the height increases sequentially.

[0027] Reference Figure 1 or Figure 2 or Figure 3The number of upper connectors 3 and the number of lower connectors 4 are equal. An arm column 5 is provided between each pair of upper connectors 3 and lower connectors 4. The arm column 5 can increase the load-bearing capacity of the boom.

[0028] After multiple upper connectors 3, multiple lower connectors 4, and multiple boom columns 5 are arranged and connected, the boom forms a right-angled trapezoid, giving it a certain degree of stability. The lengths of the multiple boom columns 5 also decrease sequentially, which can reduce the weight of the boom itself. Moreover, the multi-section boom formed can be bent in the horizontal direction, making it applicable to more directions during hoisting, with high flexibility. The length of the boom can also be adjusted by adding or removing connectors and boom columns 5 as needed.

[0029] Reference Figure 4 The upper connector 3 has connecting holes 34 at the connection points of the first hole plate 301 and the second hole plate 302, and at the connection points of the third hole plate 403 and the fourth hole plate 404 of the lower connector 4. The upper and lower ends of the arm post 5 are each provided with a connecting post 6. The diameter of the connecting post 6 is smaller than the diameter of the arm post 5 and it is integrally connected to the arm post 5. The connecting post 6 at the upper end of the arm post 5 is inserted into the corresponding connecting hole 34 of the upper connector 3, and the connecting post 6 at the lower end of the arm post 5 is inserted into the corresponding connecting hole 34 of the lower connector 4. This connection method allows for convenient installation, disassembly, and replacement of the arm post 5.

[0030] Reference Figure 5 All the above-mentioned rotating connections are made by inserting pins 7. The end of the pin 7 has a pin hole. A cotter pin 8 is inserted into the pin hole to install the pin 7 and prevent the pin 7 from falling off. The pin 7 is also equipped with a bearing 9 to make the rotation more flexible. The connection method of the pin 7 makes it easier to disassemble and assemble the connecting parts.

[0031] When the serpentine multi-section boom is damaged or deformed at a certain point, due to its multi-section structure and the ease of disassembly and assembly of the boom column 5 and various connecting parts, only the damaged or deformed connecting parts or boom column 5 need to be replaced, making maintenance convenient and cost-effective.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A serpentine multi-section crane boom, characterized in that: It includes a support column (1), a lifting device connector (2), multiple upper connectors (3) and multiple lower connectors (4); the multiple upper connectors (3) are arranged in sequence, and the multiple lower connectors (4) are arranged in sequence. The upper connecting member (3) includes a first perforated plate (301) and a second perforated plate (302), the first perforated plate (301) and the second perforated plate (302) are fixedly connected; the first perforated plate (301) of the first upper connecting member (3) is connected to the support column (1), and the first perforated plate (301) of the remaining upper connecting members (3) is rotatably connected to the second perforated plate (302) of the previous upper connecting member (3); the second perforated plate (302) of the last upper connecting member (3) is connected to the lifting device connecting member (2), and the second perforated plate (302) of the remaining upper connecting members (3) is rotatably connected to the first perforated plate (301) of the next upper connecting member (3); The lower connector (4) includes a third hole plate (403) and a fourth hole plate (404), which are fixedly connected. The third hole plate (403) of the first lower connector (4) is connected to the support column (1), and the third hole plate (403) of the remaining lower connectors (4) is rotatably connected to the fourth hole plate (404) of the previous lower connector (4). The fourth hole plate (404) of the last lower connector (4) is connected to the lifting device connector (2), and the fourth hole plate (404) of the remaining lower connectors (4) is rotatably connected to the third hole plate (403) of the next lower connector (4).

2. The serpentine multi-section boom according to claim 1, characterized in that: The number of upper connectors (3) and the number of lower connectors (4) are equal, and an arm post (5) is provided between the upper connectors (3) and the lower connectors (4).

3. A serpentine multi-section boom according to claim 2, characterized in that: The first hole plate (301) and the second hole plate (302) of the upper connector (3) are fixedly connected with each other in a staggered manner. The height of the first hole plate (301) is higher than the height of the second hole plate (302). The first hole plate (301) of the first upper connector (3) is rotatably connected to the support column (1). The first hole plates (301) of the remaining upper connectors (3) are located above the second hole plate (302) of the previous upper connector (3). The second hole plate (302) of the last upper connector (3) is rotatably connected to the lifting connector (2). The second hole plates (302) of the remaining upper connectors (3) are located below the first hole plate (301) of the next upper connector (3). The third hole plate (403) and the fourth hole plate (404) of the lower connector (4) are located on the same horizontal plane. The third hole plate (403) of the first lower connector (4) is rotatably connected to the support column (1), and the third hole plate (403) of the remaining lower connectors (4) is located above the fourth hole plate (404) of the previous lower connector (4). The fourth hole plate (404) of the last lower connector (4) is rotatably connected to the lifting device connector (2), and the fourth hole plate (404) of the remaining lower connectors (4) is located below the third hole plate (403) of the next lower connector (4).

4. A serpentine multi-section boom according to claim 3, characterized in that: The connection points of the first hole plate (301) and the second hole plate (302) of the upper connector (3) and the connection points of the third hole plate (403) and the fourth hole plate (404) of the lower connector (4) are respectively provided with connection holes (34). The upper and lower ends of the arm column (5) are provided with connection posts (6). The connection post (6) at the upper end of the arm column (5) is inserted into the connection hole (34) of the corresponding upper connector (3), and the connection post (6) at the lower end of the arm column (5) is inserted into the connection hole (34) of the corresponding lower connector (4).

5. A serpentine multi-section boom according to any one of claims 1-4, characterized in that: The rotatable connection is made by insert pin (7), and a bearing (9) is also provided on the pin (7).

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