Auxiliary folding and unfolding device for foldable jib

Abstract

This application belongs to the technical field of construction machinery, specifically relating to an auxiliary folding and unfolding device for a foldable boom. The auxiliary folding and unfolding device includes a support frame, a movable frame, and a drive assembly. The movable frame is movably engaged with the support frame, and the drive assembly is used to drive the movable frame to move. The support frame is connected to one of the relatively movable boom components of the foldable boom, and the movable frame is connected to the other. The foldable boom includes a first boom component and a second boom component, and has a folded posture and an assembled posture. In this application, the movable frame is connected to the first boom component, and the support frame is connected to the second boom support component. The drive assembly is used to drive the movable frame to move relative to the support frame, thereby achieving relative movement between the first boom component and the second boom component. This replaces auxiliary equipment such as cranes in the folding and unfolding process of the foldable boom, simplifying the operation steps of the foldable boom and improving the assembly and disassembly efficiency.

Description

Technical Field

[0001] This application belongs to the technical field of construction machinery, and specifically relates to an auxiliary folding and unfolding device for a foldable boom. Background Technology

[0002] The current development of the lifting industry has led to increasingly higher requirements for lifting height and lifting capacity. As the core load-bearing component of construction machinery, the performance requirements for the boom are also becoming increasingly stringent.

[0003] In the existing technology, the method of widening the existing boom to improve the stability of the boom is adopted. The specific way to achieve the widening of the boom is to assemble multiple components. The foldable boom has an assembly posture and a folding posture. Switching from the assembly posture to the folding posture or from the folding posture to the assembly posture requires relative movement of the components of the foldable boom. This relative movement process often requires the assistance of a crane, resulting in low assembly and disassembly efficiency of the boom that needs to be widened. Summary of the Invention

[0004] The purpose of this application is to provide an auxiliary folding and unfolding device for a foldable boom, which aims to improve the assembly and disassembly efficiency of the foldable boom.

[0005] To achieve the above objectives, this application provides an auxiliary folding and unfolding device for a foldable boom, comprising: Support frame; A movable frame that moves in conjunction with the support frame; A drive component for driving the moving frame to move; The support frame is used to connect to one of the boom components that are movable relative to the foldable boom, and the movable frame is used to connect to the other.

[0006] In some embodiments, the support frame is provided with a moving track extending along the switching path, and the bottom of the moving frame is provided with a moving component that moves in conjunction with the moving track.

[0007] In some embodiments, the moving track is groove-shaped, the moving component includes a pulley, the pulley's axle is connected to the moving frame and the axle axis is perpendicular to the bottom surface of the moving track, and the pulley's diameter is equal to the groove width of the moving track.

[0008] In some embodiments, the support frame is provided with a support plate, and the bottom of the movable frame is provided with a ground wheel assembly that moves in coordination with the support plate.

[0009] In some embodiments, the movable frame is provided with a first rotating link and a second rotating link at both ends along the lateral direction. One end of the first rotating link is pivotally connected to the support frame and the other end is pivotally connected to the movable frame. One end of the second rotating link is pivotally connected to the support frame and the other end is pivotally connected to the movable frame.

[0010] In some embodiments, the first rotating link and the second rotating link are of the same length.

[0011] In some embodiments, the first rotating link and the second rotating link are at the same height and are lower than the height of the moving frame.

[0012] In some embodiments, the support frame is provided with a first fixed seat and a second fixed seat arranged longitudinally at intervals. The first fixed seat and the second fixed seat are located on the same side of the movable frame in the transverse direction. The movable frame is provided with a first connecting seat and a second connecting seat arranged longitudinally at intervals. The distance between the first fixed seat and the first connecting seat is equal to the distance between the second fixed seat and the second connecting seat. The first fixed seat and the first connecting seat are respectively connected to the two ends of the first rotating link, and the second fixed seat and the second connecting seat are respectively connected to the two ends of the second rotating link.

[0013] In some embodiments, the support frame is provided with a first cylinder seat and a second cylinder seat arranged longitudinally at intervals. The first cylinder seat and the first fixed seat are located on the same side of the movable frame in the transverse direction. The second cylinder seat and the second fixed seat are located on the same side of the movable frame in the transverse direction. A first mounting seat is provided at the middle of the first rotating link, and a second mounting seat is provided at the middle of the second rotating link. The drive assembly includes a first drive cylinder and a second drive cylinder. The first drive cylinder connects the first cylinder seat and the first mounting seat, and the second drive cylinder connects the second cylinder seat and the second mounting seat.

[0014] In some embodiments, both the top of the mobile frame and the top of the support frame are provided with support components for connecting the boom assembly.

[0015] Through the above technical solution, the auxiliary folding and unfolding device for the foldable boom of this application has the following beneficial effects: The foldable boom has a folded posture and an assembled posture and includes multiple boom components that can move relatively. The support frame is connected to one of the relatively movable boom components of the foldable boom, and the moving frame is connected to another. The relative movement between the boom components is achieved by the movement of the moving frame and the support frame. At the same time, a drive component is provided to assist in the relative movement between the moving frame and the support frame, thereby facilitating the relative movement between the boom components and improving the assembly and disassembly efficiency of the foldable boom.

[0016] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a structural schematic diagram of a foldable boom (assembled posture) according to a specific embodiment of this application; Figure 2 This is a structural schematic diagram of a foldable boom (folded posture) according to a specific embodiment of this application; Figure 3 This is a schematic diagram of the switching path of the foldable boom according to a specific embodiment of this application; Figure 4 This is an exploded view of a foldable boom according to a specific embodiment of this application; Figure 5 This is a structural schematic diagram of the first arm component of the foldable arm according to a specific embodiment of this application; Figure 6 This is a structural schematic diagram of the second boom component of the foldable boom according to a specific embodiment of this application; Figure 7 This is a schematic diagram of the connecting frame according to a specific embodiment of this application; Figure 8 This is a structural schematic diagram of the auxiliary unfolding device (without support frame) according to a specific embodiment of this application; Figure 9 This is an assembly diagram of the auxiliary folding device and the foldable arm (assembly posture) according to a specific embodiment of this application; Figure 10 This is a schematic diagram of the assembly of the auxiliary folding device and the foldable arm (folded posture) according to a specific embodiment of this application; Figure 11This is a structural schematic diagram of the auxiliary unfolding device (without support frame) according to a specific embodiment of this application; Figure 12 This is a schematic diagram illustrating the transformation of the auxiliary folding device during the switching process of the foldable boom according to a specific embodiment of this application; Figure 13 This is a schematic diagram of the arrangement of the moving track and support frame according to a specific embodiment of this application; Figure 14 This is a schematic diagram showing the arrangement of the support plate and support frame according to a specific embodiment of this application; Figure 15 This is an exploded view of the ground wheel assembly according to a specific embodiment of this application.

[0018] Explanation of reference numerals in the attached figures 100. Foldable boom; 10. First boom assembly; 11. First upper chord; 12. First lower chord; 13. First transverse web member; 14. First middle web member; 15. First diagonal web member; 161. First protruding splice; 162. First concave splice; 17. First reinforcing rod; 18. First chord connecting hinge; 19. First mating part; 20. Second boom assembly; 21. Second upper chord; 22. Second lower chord; 23. Second transverse web member; 24. 25. Second diagonal web member; 261. Second convex splice; 262. Second concave splice; 27. Second reinforcing rod; 28. Second chord connecting hinge; 29. ​​Second mating part; 30. Connecting frame; 31. First connecting frame; 32. Second connecting frame; 33. Connecting horizontal bar; 34. Connecting vertical bar; 35. Connecting diagonal bar; 36. Connecting hinge on the frame; 1. Arc-shaped path; 2. Splicing bolt; 3. Connecting pin; 4. Convex structure; 5. Concave structure; 200. Auxiliary folding and unfolding device; 210. Support frame; 211. First fixed seat; 212. Second fixed seat; 213. First hydraulic cylinder seat; 214. Second hydraulic cylinder seat; 215. Second support member; 216. Second connecting member; 217. Second bearing member; 218. Angle limiting block; 220. Movable frame; 221. First connecting seat; 222. Second connecting seat; 223. First rod; 224. Second rod; 225. First support member 226. Support component; 227. First connecting component; 230. First bearing component; 231. Moving component; 232. Pulley; 233. Ground wheel mounting base; 234. Roller; 235. Wheel axle; 236. Through connecting pin; 240. Moving track; 250. First rotating connecting rod; 251. First mounting base; 260. Second rotating connecting rod; 263. Second mounting base; 270. First driving cylinder; 280. Second driving cylinder; 290. Support plate. Detailed Implementation

[0019] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0020] The terminology section according to this application is described below with reference to the accompanying drawings.

[0021] like Figures 1 to 3 As shown, a specific embodiment of this application provides a foldable boom 100, which has a folded posture and an assembled posture, and includes a first boom assembly 10, a second boom assembly 20, and a guide device. The second boom assembly 20 is detachably connected to the first boom assembly 10. The first boom assembly 10 and the second boom assembly 20 can move relative to each other to switch between the folded posture and the assembled posture. The guide device is movably connected to the first boom assembly 10 and the second boom assembly 20 and is used to limit the relative movement path of the first boom assembly 10 and the second boom assembly 20.

[0022] The foldable boom 100 has its minimum lateral width when in the folded position and its maximum lateral width when in the assembly position. During the transfer of the foldable boom 100, it needs to be switched to the folded position for easy transfer. When the foldable boom 100 needs to be assembled onto mechanical equipment, it needs to be switched to the assembly position. In this application, a guide device connects the first boom assembly 10 and the second boom assembly 20, ensuring that the first boom assembly 10 and the second boom assembly 20 are not completely separated in either the folded or assembly position. In other words, the first boom assembly 10 and the second boom assembly 20 are always a single unit. Switching between the folded and assembly positions can be completed simply by moving the first boom assembly 10 and the second boom assembly 20 relative to each other, thereby saving assembly and disassembly steps and improving the assembly and disassembly efficiency of the foldable boom 100.

[0023] Specifically, the first boom assembly 10 and the second boom assembly 20 are detachably connected, effectively enabling the locking and unlocking of the first boom assembly 10 and the second boom assembly 20. The guiding device limits the relative movement path of the first boom assembly 10 and the second boom assembly 20. When switching from the folding posture to the assembly posture, the first boom assembly 10 and the second boom assembly 20 are first unlocked, then the first boom assembly 10 and the second boom assembly 20 are moved away from each other until the foldable boom 100 reaches its maximum lateral width, and finally the positions of the first boom assembly 10 and the second boom assembly 20 are locked. When switching from the assembly posture to the folding posture, the first boom assembly 10 and the second boom assembly 20 are first unlocked, then the first boom assembly 10 and the second boom assembly 20 are moved closer to each other until the foldable boom 100 reaches its minimum lateral width, and finally the positions of the first boom assembly 10 and the second boom assembly 20 are locked. It is evident that the entire process does not require complete separation of the first boom assembly 10 and the second boom assembly 20, thus eliminating the need for assembly and disassembly of the first boom assembly 10 and the second boom assembly 20.

[0024] For ease of description, the process of switching from the folding posture to the assembly posture will be referred to as the unfolding process, and the process of switching from the assembly posture to the folding posture will be referred to as the folding process. The "length direction" of the foldable boom is the "front and back direction" and "longitudinal direction", the "width direction" of the foldable boom is the "left and right direction" and "lateral direction", and the "height direction" of the foldable boom is the "up and down direction" and "vertical direction".

[0025] like Figures 1 to 3 As shown, in some embodiments, the guiding device includes a connecting frame 30 that defines the relative movement path of the first boom assembly 10 and the second boom assembly 20 as an arc-shaped path 1. The two ends of the connecting frame 30 are pivotally connected to the first boom assembly 10 and the second boom assembly 20, respectively, to limit the relative movement of the first boom assembly 10 and the second boom assembly 20 along the arc-shaped path 1.

[0026] In fact, both the first boom assembly 10 and the second boom assembly 20 include a web structure and a chord structure. When in the folded position, the web structure of the first boom assembly 10 and the web structure of the second boom assembly 20 overlap along the width direction of the foldable boom 100 to reduce the width of the foldable boom 100. Figure 2 As shown; when in the assembly position, the web structure of the first boom assembly 10 and the web structure of the second boom assembly 20 are joined along the width direction of the foldable boom 100 to increase the width of the foldable boom 100, as shown. Figure 1As shown. In this application, a connecting frame 30 is used to limit the relative movement of the first boom assembly 10 and the second boom assembly 20 along the arc-shaped path 1, so as to avoid severe collisions between the web structure of the first boom assembly 10 and the web structure of the second boom assembly 20 during the folding and unfolding processes, thereby improving the reliability of the foldable boom 100.

[0027] like Figures 4 to 6 As shown, specifically, the chord structure of the first boom assembly 10 includes a first upper chord 11 and a first lower chord 12 arranged parallel to each other in the vertical direction. Both the first upper chord 11 and the first lower chord 12 extend in the front-rear direction. The web structure of the first boom assembly 10 includes two first transverse web members 13 arranged parallel to each other in the vertical direction. The two first transverse web members 13 are respectively arranged at the front end of the first upper chord 11 and the front end of the first lower chord 12 and both extend in the left-right direction. The chord structure of the second boom assembly 20 includes a second upper chord 21 and a second lower chord 22 arranged parallel to each other in the vertical direction. Both the second upper chord 21 and the second lower chord 22 extend in the front-rear direction. The web structure of the second boom assembly 20 includes two second transverse web members 23 arranged parallel to each other in the vertical direction. The two second transverse web members 23 are respectively arranged at the front end of the second upper chord 21 and the front end of the second lower chord 22 and both extend in the left-right direction.

[0028] Furthermore, since the first boom assembly 10 and the second boom assembly 20 are relatively long in the front-to-back direction, the connecting frame 30 includes a first connecting frame 31 and a second connecting frame 32. The first connecting frame 31 connects the first crossbeam 13 to the front end of the chord structure of the second boom assembly 20, and the second connecting frame 32 connects the second crossbeam 23 to the rear end of the chord structure of the second boom assembly 20. With this arrangement, the first connecting frame 31 and the second connecting frame 32 are used to realize the synchronous rotation of the front and rear ends of the first boom assembly 10 and the second boom assembly 20, thereby improving the stability of relative movement during the folding and unfolding processes.

[0029] Furthermore, the first connecting frame 31 and the second connecting frame 32 can also serve as structural components of the first boom assembly 10 and the second boom assembly 20, so that both ends of the first boom assembly 10 and the second boom assembly 20 are connected, thereby improving the overall integrity and structural strength of the foldable boom 100.

[0030] like Figure 5 and Figure 6As shown, in some embodiments, a first chord connecting hinge 18 is provided on the right rear end of the first upper chord 11, a first chord connecting hinge 18 is provided on the right rear end of the first lower chord 12, a second chord connecting hinge 28 is provided on the left front end of the second upper chord 21, a second chord connecting hinge 28 is provided on the left front end of the second lower chord 22, a first web member connecting hinge 13 is provided on the right end of the first web member, a second web member connecting hinge 23 is provided on the left end of the second web member, and a frame connecting hinge 36 is provided at both the left and right ends of the connecting frame 30 (see...). Figure 7 They are connected to each other by connecting pins 3.

[0031] Furthermore, the first chord connecting hinge 18 on the first upper chord 11 (first lower chord 12) is located in front of the rear end of the first upper chord 11 (first lower chord 12), and the second chord connecting hinge 28 on the second upper chord 21 (second lower chord 22) is located behind the front end of the second upper chord 21 (second lower chord 22). This arrangement allows the rear end of the first upper chord 11 (first lower chord 12) to limit the second connecting frame 32, and the front end of the second upper chord 21 (second lower chord 22) to limit the first connecting frame 31, thereby determining and maintaining the folding posture of the foldable boom 100.

[0032] Specifically, when the foldable boom 100 is in the assembled position, the first connecting frame 31 is perpendicular to the second upper chord 21 (second lower chord 22), and the second connecting frame 32 is perpendicular to the first upper chord 11 (first lower chord 12). At this time, the distance between the first upper chord 11 and the second upper chord 21 (first lower chord 12 and second lower chord 22) in the left-right direction is the maximum width of the foldable boom 100. When the foldable boom 100 is in the folded position, the side of the first connecting frame 31 abuts against the front end of the second upper chord 21 (second lower chord 22), and the side of the second connecting frame 32... The first upper chord 11 (and the rear end of the first lower chord 12) abuts against the second upper chord 21 (and the second lower chord 12). At this time, the distance between the first upper chord 11 and the second upper chord 21 (and the second lower chord 22) in the left-right direction is the minimum width of the foldable boom 100. In other words, the folding process is that the first connecting frame 31 rotates from a state perpendicular to the second upper chord 21 to a state where its side abuts against the front end of the second upper chord 21, and the second connecting frame 32 rotates from a state perpendicular to the first upper chord 11 to a state where its side abuts against the rear end of the first upper chord 11. The rotation direction of the unfolding process is opposite to that of the folding process.

[0033] In addition to considering the connection position between the connecting frame 30 and the first boom assembly 10 and the second boom assembly 20, the width of the connecting frame 30 also needs to be considered to define the arc-shaped path 1. The main influencing factor on the width of the connecting frame 30 is the construction of the web structure. In some embodiments, the web structure of the first boom assembly 10 further includes a first middle web 14 located behind the first transverse web 13. The first middle web 14 has first oblique webs 15 on both sides. One end of the first oblique web 15 is connected to the end of the first middle web 14 away from the chord structure, and the other end is connected to the chord structure. A first reinforcing rod 17 is connected between the first oblique web 15 and the first transverse web 13. The web structure of the second boom assembly 20 further includes a second middle web 24 located in front of the second transverse web 23. The second middle web 24 has second oblique webs 25 on both sides. The end of the second oblique web 25 away from the chord structure is connected to the end of the second middle web 24, and the other end is connected to the chord structure. A second reinforcing rod 27 is connected between the second oblique web 25 and the second transverse web 23.

[0034] Specifically, each of the first central web members 14 and its two adjacent first oblique web members 15 form a convex structure 4 of the web member structure. The web member structure includes at least two convex structures 4. A concave structure 5 is formed between two adjacent convex structures 4. A concave structure 5 is formed between the convex structure 4 and the connecting frame 30. It can be seen that at least two concave structures 5 are formed on both the first boom assembly 10 and the second boom assembly 20.

[0035] When the foldable boom 100 is in the assembly position, the protruding structure 4 of the first boom assembly 10 mates with the protruding structure 4 of the second boom assembly 20, as shown below. Figure 1 As shown; when the foldable boom 100 is in the folded state, the protruding structure 4 of one boom component is received within the recessed structure 5 of the other boom component, as shown. Figure 2 As shown. In other words, the folding process of the foldable boom 100 is the convex structure 4 entering the concave structure 5, and the unfolding process is the convex structure 4 disengaging from the concave structure 5.

[0036] like Figure 5 and Figure 6 As shown, in order to maintain the assembly posture and folding posture, in some embodiments, the first boom assembly 10 has a first protruding splicing member 161 on the protruding structure 4 and a first concave splicing member 162 on the concave structure 5 of the first boom assembly. The second boom assembly 20 has a second protruding splicing member 261 on the protruding structure 4 and a second concave splicing member 262 on the concave structure 5 of the second boom assembly 20. The first protruding splicing member 161 and the second protruding splicing member 261 are detachably connected, the first protruding splicing member 161 and the second concave splicing member 262 are detachably connected, and the first concave splicing member 162 and the second protruding splicing member 261 are detachably connected.

[0037] When the foldable boom 100 is in the assembly posture, the first protruding splicing member 161 is connected to the second protruding splicing member 261 to maintain the assembly posture, such as... Figure 1 As shown; when the foldable boom 100 is in the folded position, the first protruding splice 161 is connected to the second concave splice 262, and the second protruding splice 261 is connected to the first concave splice 162, so as to maintain the folded position, as shown. Figure 2 As shown.

[0038] Specifically, both the first convex splicing member 161 and the first concave splicing member 162 include two first splicing plates arranged vertically at intervals. The two first splicing plates are vertically aligned and have first splicing holes. Both the second convex splicing member 261 and the second concave splicing member 262 include a second splicing plate with a second splicing hole. The thickness of the second splicing plate is less than the distance between the two first splicing plates. The first splicing plates and the second splicing plates are connected by splicing pins.

[0039] When the protruding structure 4 of the first boom assembly 10 is joined with the protruding structure 4 of the second boom assembly 20, it is in the splicing position. When the protruding structure 4 of the first boom assembly 10 is received into the concave structure 5 of the second boom assembly 20, it is in the folded position. To avoid interference with the protruding structure 4 of the second boom assembly 20, the relative movement path from the folded position to the splicing position is set as an arc-shaped path 1. Since the first central strut 14 (second central strut 24) is provided with a first protruding splicing member 161 (second protruding splicing member 261), the radius of the arc-shaped path 1 must be smaller than the length of the first central strut 14 (second central strut 24). The radius of the arc-shaped path 1 is the width of the first connecting frame 31 (second connecting frame 32) in the transverse direction. In other words, the width of the first connecting frame 31 (second connecting frame 32) in the transverse direction is less than the length of the first central web member 14 (second central web member 24). When in the splicing state, the length of the first horizontal web member 13 (second horizontal web member 23) plus the width of the first connecting frame 31 (second connecting frame 32) in the transverse direction is equal to the length of the first central web member 14 (second central web member 24) plus the length of the second central web member 24 (first central web member 14). Therefore, the length of the first horizontal web member 13 (second horizontal web member 23) is greater than the length of the first central web member 14 (second central web member 24).

[0040] Furthermore, during the folding process, the rotation of the first connecting frame 31 causes the protruding structure 4 of the first boom assembly 10 to be received into the concave structure 5 formed by the protruding structure 4 of the first connecting frame 31 and the second boom assembly 20. Since the first central web rod 14 (second central web rod 24) is provided with a first protruding splice 161 (second protruding splice 261), the width of the first connecting frame 31 (second connecting frame 32) in the transverse direction is smaller than the distance between the first transverse web rod 13 (second transverse web rod 23) and the first central web rod 14 (second central web rod 24) in the front-back direction.

[0041] For ease of processing, the first boom assembly 10 and the second boom assembly 20 have the same dimensions and structure. That is, the length of the first transverse web bar 13 is equal to the length of the second transverse web bar 23, the length of the first middle web bar 14 is equal to the length of the second middle web bar 24, the length of the first upper chord bar 11 is equal to the length of the second upper chord bar 21, and the length of the first lower chord bar 12 is equal to the length of the second lower chord bar 22. Therefore, the dimensions of the first connecting frame 31 and the second connecting frame 32 are also the same, so that the rotation of the two ends of the first boom assembly 10 and the second boom assembly 20 can be synchronized, thereby ensuring the realization of the folding and unfolding processes.

[0042] The lengths of the first transverse web member 13, the second transverse web member 23, the first middle web member 14, the second middle web member 24, and the width of the second connecting frame 32 in the transverse direction are all taken into account, and the dimensions of the connecting components are considered.

[0043] like Figure 5 and Figure 6 As shown, in some embodiments, the first chord connecting hinge 18 on the first upper chord 11 (first lower chord 12) also serves as the first recessed splice 162. Specifically, the first chord connecting hinge 18 has two ear plate holes, one for connecting to the second connecting frame 32 and the other for connecting to the first protruding splice 161. The second chord connecting hinge 28 on the second upper chord 21 (second lower chord 22) also serves as the second recessed splice 262. Specifically, the second chord connecting hinge 28 has two ear plate holes, one for connecting to the first connecting frame 31 and the other for connecting to the second protruding splice 261. This arrangement helps reduce the number of additional components.

[0044] like Figure 7 As shown, in some embodiments, the connecting frame 30 includes a connecting crossbar 33, one end of which is pivotally connected to the first boom assembly 10 and the other end of which is pivotally connected to the second boom assembly 20. The distance between the pivot points at both ends of the connecting crossbar 33 is equal to the radius of the arc-shaped path 1.

[0045] Furthermore, the connecting frame 30 includes two connecting horizontal bars 33 arranged vertically at intervals and a connecting vertical bar 34 connecting the two connecting horizontal bars 33. Each connecting horizontal bar 33 has a connecting hinge 36 on both ends to increase the number of connection points between the connecting frame 30 and the first boom assembly 10 and the second boom assembly 20, thereby ensuring the connection strength.

[0046] Furthermore, there are two connecting vertical bars 34 arranged at intervals along the horizontal direction. The connecting horizontal bar 33 and the connecting vertical bar 34 form a rectangular frame structure. The connecting frame 30 also includes a connecting diagonal bar 35, which is arranged on the diagonal of the rectangular frame structure to ensure the structural strength of the connecting frame 30.

[0047] In some embodiments, the foldable boom 100 also includes a locking element for restricting the movement of the guide device. This configuration allows the foldable boom 100 to be maintained in both a folded and assembled position.

[0048] like Figures 1 to 6 As shown, in an exemplary embodiment of this application, the foldable boom 100 includes a first connecting frame 31 and a second connecting frame 32. The first boom assembly 10 has four protruding structures 4 and four recessed structures 5, wherein two protruding structures 4 and two recessed structures 5 are located in the same horizontal plane, and the other two protruding structures 4 and two recessed structures 5 are located in another horizontal plane. The second boom assembly 20 has four protruding structures 4 and four recessed structures 5, wherein two protruding structures 4 and two recessed structures 5 are located in the same horizontal plane, and the other two protruding structures 4 and two recessed structures 5 are located in another horizontal plane. When in the folded position, the protruding structure 4 of the first boom assembly 10 and the protruding structure 4 of the second boom assembly 20 are connected one-to-one; when in the assembled position, the protruding structure 4 of the first boom assembly 10 and the concave structure 5 of the second boom assembly 20 are connected one-to-one, and the protruding structure 4 of the second boom assembly 20 and the concave structure 5 of the second boom assembly 20 are connected one-to-one.

[0049] The following describes the folding and unfolding processes of the foldable boom 100 provided in the exemplary embodiment.

[0050] The folding process is as follows: First, remove the connecting bolts 2 connecting the first protruding splice 161 of the first boom assembly 10 and the second protruding splice 261 of the second boom assembly 20 (if the first connecting frame 31 and the second connecting frame 32 are equipped with locking devices, the locking devices also need to be unlocked); then, fix the second boom assembly 20 and rotate the first boom assembly 10 forward and toward the direction closer to the second boom assembly 20 until the side of the first connecting frame 31 abuts against the inner side of the chord structure of the second boom assembly 20, and the side of the second connecting frame 32 abuts against the first boom assembly. The inner side of the chord structure of the first boom assembly 10 abuts against the second boom assembly 20, and the protruding structure 4 of the first boom assembly 10 is housed in the recessed structure 5 of the second boom assembly 20, and the protruding structure 5 of the second boom assembly 20 is housed in the recessed structure 5 of the first boom assembly 20; finally, the first protruding splice 161 of the first boom assembly 10 and the second recessed splice 262 of the second boom assembly 20 are connected by splicing bolts 2, and the second protruding splice 261 of the second boom assembly 20 and the first recessed splice 162 of the first boom assembly 10 are connected by splicing bolts 2.

[0051] The unfolding process is as follows: First, remove the bolt 2 connecting the first protruding splice 161 of the first boom assembly 10 and the second concave splice 262 of the second boom assembly 20; then, remove the bolt 2 connecting the second protruding splice 261 of the second boom assembly 20 and the first concave splice 162 of the first boom assembly 10; then, fix the second boom assembly 20 and rotate the first boom assembly 10 backward and away from the second boom assembly 20 until the first connection... The frame 31 is perpendicular to the chord structure of the second boom assembly 20, the second connecting frame 32 is perpendicular to the chord structure of the first boom assembly 10, and the protrusion structure 4 of the first boom assembly 10 is connected to the protrusion structure 4 of the second boom assembly 20; finally, the first protrusion splice 161 of the first boom assembly 10 and the second protrusion splice 261 of the second boom assembly 20 are connected by splicing bolts 2 (if the first connecting frame 31 and the second connecting frame 32 are equipped with locking parts, the locking parts also need to be locked).

[0052] As can be seen, in this application, if the unfolding and folding processes are required, only the connecting bolts 2 need to be removed (installed). Taking the foldable boom 100 with only two protruding structures 4 as an example, only eight connecting bolts 2 need to be removed (installed), which is much lower than that of the conventional foldable boom 100, so as to simplify the entire operation steps and improve the disassembly and assembly efficiency of the foldable boom 100.

[0053] A specific embodiment of this application also provides an engineering machine, including the foldable boom 100 described above. Since the engineering machine employs all embodiments of the foldable boom 100 described above, it possesses all the beneficial effects brought about by all embodiments of the foldable boom 100. The engineering machine in this application includes crawler cranes, wheeled cranes, etc.

[0054] like Figure 8 As shown, a specific embodiment of this application also provides an auxiliary folding device 200 for a foldable boom 100, including a movable frame 220. The movable frame 220 is used to support one of the boom components of the foldable boom 100 that can move relative to each other, and a movable component 230 is provided at the bottom of the movable frame 220.

[0055] Furthermore, the auxiliary unfolding device 200 also includes a guide component connected to the movable frame 220 and defining the movement of the movable frame 220 along the switching path.

[0056] like Figure 1 and Figure 2 As shown, the foldable boom 100 includes a first boom assembly 10 and a second boom assembly 20, and has a folded posture and an assembled posture. The foldable boom 100 has its minimum lateral width when in the folded posture, as shown below. Figure 1 As shown; the foldable boom 100 has its maximum width in the lateral direction when it is in the assembly position, as shown. Figure 2 As shown. During the transfer of the foldable boom 100, it needs to be switched to a folded position for easy transfer. When the foldable boom 100 needs to be assembled onto mechanical equipment, it needs to be switched to an assembly position. The process of switching from the folded position to the assembly position is called the unfolding process, and the process of switching from the assembly position to the folded position is called the folding process. For example... Figure 9 and Figure 10 As shown in this application, the mobile frame 220 supports the first boom assembly 10 and fixes the second boom support assembly relatively. The mobile component 230 below the mobile frame 220 is used to make the mobile frame 220 drive the first boom assembly 10 and the second boom assembly 20 to move relative to each other along the switching path, thereby simplifying the operation steps of the foldable boom 100 and improving the assembly and disassembly efficiency of the foldable boom 100.

[0057] like Figure 3 As shown, based on the aforementioned structural description of the foldable boom 100, it can be known that the switching path of the foldable boom 100 is an arc-shaped path 1. For example... Figure 8As shown, in some embodiments, the guide assembly includes multiple rotating links connected to the movable frame 220. One end of each rotating link is pivotally connected to the movable frame 220, while the other end is fixed in position and rotatable. This configuration utilizes the synchronous rotation of the multiple rotating links to drive the translation of the movable frame 220, thereby enabling the unfolding and folding processes of the foldable boom 100 along the arc-shaped path 1.

[0058] Specifically, the movable frame 220 includes a first rod 223 extending longitudinally, and a rotating linkage including a first rotating linkage 250 and a second rotating linkage 260. The first rotating linkage 250 and the second rotating linkage 260 are parallel to each other and are respectively connected to both ends of the first rod 223. This configuration utilizes the synchronous rotation of the first rotating linkage 250 and the second rotating linkage 260 to achieve translation of the movable frame 220, thereby causing the first boom assembly 10 supported on the movable frame 220 to move closer to and away from the fixed second boom assembly 20. This enables the unfolding and folding processes of the foldable boom 100, and the relatively stable rotation process ensures relatively stable translation of the movable frame 220.

[0059] It can be seen that by controlling the rotation angle of the first rotating link 250 and the second rotating link 260 during rotation, the moving distance of the moving frame 220 is controlled, and the moving direction of the moving frame 220 is controlled by controlling the rotation direction, so as to achieve accurate control of the movement of the moving frame 220, thereby achieving precise positioning of the unfolding and folding processes of the foldable arm 100.

[0060] Furthermore, the first rotating link 250 and the second rotating link 260 are of the same length. This arrangement ensures that the rotation paths of the first rotating link 250 and the second rotating link 260 are parallel to each other and located in the same horizontal plane, thereby ensuring that the first boom assembly 10 supported on the moving frame 220 is in a horizontal position and thus ensuring the stability of the first boom assembly 10 during movement.

[0061] Furthermore, the first rotating link 250 and the second rotating link 260 are at the same height and lower than the height of the first member 223. This arrangement ensures that the height of the first boom assembly 10, supported on the first member 223, is higher than that of the first rotating link 250 and the second rotating link 260, thereby preventing interference between the first boom assembly 10 and the first rotating link 250 and the second rotating link 260 during rotation.

[0062] like Figure 8 As shown, in some embodiments, the movable frame 220 further includes a second rod 224 connected to the first rod 223, and the connection between the second rod 224 and the first rod 223 is located between the first rotating link 250 and the second rotating link 260.

[0063] Specifically, the second member 224 is perpendicular to the first member 223. The first member 223 is parallel to the chord structure of the first boom assembly 10 to support the chord structure of the first boom assembly 10. The second member 224 is located on one side of the first member 223 to support the web structure of the first boom assembly 10.

[0064] With this configuration, the first boom assembly 10 is supported by a supporting plane formed by the mutually perpendicular first rod 223 and second rod 224, thereby achieving overall support for the first boom assembly 10 and ensuring the stability of the first boom assembly 10 during movement.

[0065] Furthermore, using the first rod 223 and the second rod 224 to form the movable frame 220 helps to reduce its own weight while having sufficient structural strength.

[0066] like Figure 8 As shown, in some embodiments, the first rod 223 is provided with a plurality of first support members 225 arranged longitudinally at intervals, and the first support members 225 are formed with a support surface for supporting the boom assembly.

[0067] Furthermore, the second member 224 is provided with a first support member 227, on which a support surface for supporting the boom assembly is formed. Specifically, the support surface of the first support member 225 can be configured to match the shape of the chord structure, and the support surface of the first support member 227 can be configured to match the shape of the web member structure, so as to achieve synchronous multi-point support for the chord structure and web member structure of the boom assembly. In addition, the heights of the first support member 225 and the first support member 227 are matched so that the boom assembly is in a horizontal state. At the same time, it can avoid direct contact between the boom assembly and the first member 223 and the second member 224, which would cause wear and thus extend the service life of the device.

[0068] like Figure 8 and Figure 5 As shown, the second member 224 is further provided with a first connecting member 226, which is used for detachable connection with the boom assembly. Specifically, a first mating member 19 can be provided on the boom assembly. The connection between the first connecting member 226 and the first mating member 19 is used to fix the boom assembly relative to the moving frame 220, thereby preventing the boom assembly from slipping off the moving frame 220. Specifically, the first connecting member 226 can be a bolt, and the first mating member can be a plate with holes. After the bolt and the plate are inserted, the two are fastened together using a nut that matches the bolt. Other specific forms of the first connecting member 226 and the first mating member 19 that can achieve connection and matching are also within the scope of protection of this application.

[0069] The first support member 225, the first load-bearing member 227, and the first connecting member 226 together constitute a support assembly installed on the mobile frame 220 for connecting the boom components.

[0070] like Figure 11 As shown, in some embodiments, the auxiliary folding device 200 further includes a support frame 210, a movable frame 220 that is movably engaged with the support frame 210, the support frame 210 being connected to one of the arm components of the foldable arm 100 that are capable of relative movement, and the movable frame 220 being connected to the other, that is, the movable frame 220 being connected to the first arm component 10 and the support frame 210 being connected to the second arm component 20, thereby enabling relative movement between the first arm component 10 and the second arm component 20.

[0071] like Figure 11 and Figure 12 As shown, after determining that the switching path of the foldable boom 100 is an arc-shaped path 1, in some embodiments, the support frame 210 is provided with a moving track 240 extending along the switching path, and the bottom of the moving frame 220 is provided with a moving component 230 that moves in conjunction with the moving track 240. This arrangement utilizes the moving cooperation of the moving track 240 and the moving component 230 to ensure the stability of the relative movement of the first boom assembly 10 and the second boom assembly 20. Simultaneously, the moving track 240 matches the switching path of the foldable boom 100, facilitating attitude switching of the foldable boom 100. Specifically, the switching path is an arc-shaped path 1, and the corresponding moving track 240 is set as an arc-shaped track.

[0072] like Figure 11 and Figure 12 As shown, to reduce the height of the device, in some embodiments, the moving track 240 is groove-shaped, and the moving component 230 includes a pulley 231. The axle 234 of the pulley 231 is connected to the moving frame 220, and the axis of the axle 234 is perpendicular to the bottom surface of the moving track 240. The diameter of the pulley 231 is equal to the groove width of the moving track 240. This arrangement allows the moving component 230 to be embedded in the moving track 240, which not only reduces the height of the device but also minimizes the fluctuations in the relative movement between the support frame 210 and the moving frame 220, thereby ensuring the stability of the relative movement between the first boom assembly 10 and the second boom assembly 20.

[0073] It should be noted that the moving component 230 may also be selected from other components such as sliders that cooperate with the moving track 240, and other components are also within the scope of protection of this application.

[0074] like Figure 13 As shown, specifically, there are three moving tracks 240, and correspondingly, there are also three pulleys 231, so that the top surface of the moving frame 220 remains horizontal, thereby ensuring that the boom assembly remains horizontal during movement.

[0075] like Figure 14 and Figure 15 As shown, the moving track 240 is not actually necessary. Its main function is to improve the stability of movement. If cost is to be saved, the moving track 240 can be eliminated and the support plate 290 can be directly set on the support frame 210. At the same time, the moving component 230 can be set as the ground wheel component.

[0076] Specifically, the ground wheel assembly includes a ground wheel mounting base 232 and a roller assembly. The roller assembly is mounted on the ground wheel mounting base 232. The bottom of the ground wheel mounting base 232 is provided with an embedding groove. The roller assembly includes multiple axles 234 arranged in parallel and spaced apart, and the axles 234 are pivotally connected to the side wall of the embedding groove. Rollers 233 are sleeved on the axles 234.

[0077] Furthermore, the ground wheel mounting base 232 is connected to the movable frame 220 via a through pin 235 and extends out of the movable frame 220 as a first connecting seat 221 and a second connecting seat 222, so that the rotating link is directly mounted on the ground wheel mounting base 232, thereby reducing the number of components. However, it should be noted that the rotating link and the ground wheel mounting base 232 are fixedly connected, and the axle 234 of the roller 233 is on the same straight line as the rotating link, so that the moving direction of the roller 233 is the rotating direction of the rotating link. Since the rotation path of the rotating link is a switching path, the movable frame 220 can be moved along the switching path by setting the rotating link and the ground wheel assembly.

[0078] Meanwhile, to prevent the mobile frame 220 from slipping off the support frame 210, an angle limiting block 218 can be set on the support frame 210 to cooperate with the ground wheel assembly for limiting.

[0079] like Figure 11 As shown, in some embodiments, the auxiliary folding device 200 further includes a drive assembly for driving the movable frame 220 to move. The drive assembly pushes the movable frame 220 to move relative to the support frame 210, thereby saving manpower and improving efficiency.

[0080] Specifically, the drive assembly includes a first drive cylinder 270 and a second drive cylinder 280, which are used to drive the first rotating link 250 and the second rotating link 260 to rotate, respectively. Since the stroke of the drive cylinder needs to meet the length requirements of the switching path, but an excessively long stroke would result in a larger drive cylinder size, increasing both cost and device weight, connecting the drive cylinder to the rotating link to drive the moving frame 220 effectively shortens the required stroke of the drive cylinder.

[0081] like Figure 13 and Figure 8As shown, to enable the installation of all components on the support frame 210, in some embodiments, the support frame 210 is provided with a first fixed seat 211 and a second fixed seat 212 arranged longitudinally at intervals. The first fixed seat 211 and the second fixed seat 212 are located on the same side of the movable frame 220 in the transverse direction. The movable frame 220 is provided with a first connecting seat 221 and a second connecting seat 222 arranged longitudinally at intervals. The distance between the first fixed seat 211 and the first connecting seat 221 is equal to the distance between the second fixed seat 212 and the second connecting seat 222. The first fixed seat 211 and the first connecting seat 221 are respectively connected to the two ends of the first rotating connecting rod 250, and the second fixed seat 212 and the second connecting seat 222 are respectively connected to the two ends of the second rotating connecting rod 260. The installation position of the corresponding moving track 240 on the support frame 210 is determined according to the length of the first rotating connecting rod 250 and the position of the first connecting seat 221, and the position of the corresponding moving track 240 is determined according to the length of the second rotating connecting rod 260 and the position of the second connecting seat 222.

[0082] Furthermore, the support frame 210 is provided with a first cylinder seat 213 and a second cylinder seat 214 arranged longitudinally at intervals. The first cylinder seat 213 and the first fixed seat 211 are located on the same side of the moving frame 220 along the longitudinal direction, and the second cylinder seat 214 and the second fixed seat 212 are located on the same side of the moving frame 220 along the transverse direction. The first rotating connecting rod 250 is provided with a first mounting seat 251 at the middle, and the second rotating connecting rod 260 is provided with a second mounting seat 263 at the middle. The first driving cylinder 270 connects the first cylinder seat 213 and the first mounting seat 251, and the second driving cylinder 280 connects the second cylinder seat 214 and the second mounting seat 263.

[0083] Furthermore, the width of the support frame 210 in the left-right direction is equal to the maximum width of the foldable boom 100, and the length of the movable frame 220 in the front-back direction is less than the length of the support frame 210 in the front-back direction. The movable frame 220 has corresponding folding and assembly positions. The folding position is located at the middle of the support frame 210 in the left-right direction. When the movable frame 220 is in the folding position, the first drive cylinder 270 and the second drive cylinder 280 are at their shortest stroke. The assembly position is located at the left edge of the support frame 210. When the movable frame 220 is in the assembly position, the first drive cylinder 270 and the second drive cylinder 280 are at their longest stroke. This arrangement ensures that the performance of the first drive cylinder 270 and the second drive cylinder 280 is not wasted, while also keeping the size of the support frame 210 relatively small.

[0084] like Figure 13 As shown, in some embodiments, the support frame 210 is provided with a plurality of second support members 215 arranged longitudinally at intervals, and the second support members 215 are formed with a support surface for supporting the boom assembly.

[0085] Furthermore, the support frame 210 is provided with a second bearing member 217, on which a bearing surface for supporting the boom assembly is formed. Specifically, the bearing surface of the second support member 215 can be configured to match the shape of the chord structure, and the bearing surface of the second bearing member 217 can be configured to match the shape of the web structure, so as to achieve synchronous multi-point support for the chord structure and web structure of the boom assembly. In addition, the heights of the second support member 215 and the second bearing member 217 are matched so that the boom assembly is in a horizontal state, while avoiding direct contact between the boom assembly and the support frame 210 to prevent wear, thereby extending the service life of the device.

[0086] like Figure 13 and Figure 6 As shown, the support frame 210 is further provided with a second connecting member 216, which is used for detachable connection with the boom assembly. Specifically, a second mating member 29 can be provided on the boom assembly. The connection between the second connecting member 216 and the second mating member 29 is used to fix the boom assembly relative to the support frame 210, thereby preventing the boom assembly from slipping off the support frame 210. Specifically, the second connecting member 216 can be a bolt, and the first mating member can be a plate with holes. After the bolt and the plate are inserted, the two are fastened together using a nut that matches the bolt. Other specific forms of the second connecting member 216 and the second mating member 29 that can achieve connection and matching are also within the scope of protection of this application.

[0087] The second support member 215, the second bearing member 217, and the second connecting member 216 together constitute a support assembly installed on the support frame 210 for connecting the boom components.

[0088] like Figures 8 to 13As shown, in the exemplary embodiment of this application, the first boom assembly 10 is supported on the movable frame 220, and the second boom assembly 20 is supported on the support frame 210. From a top view: the extension of the first drive cylinder 270 causes the first rotating connecting rod 250 to rotate counterclockwise, and the extension of the second drive cylinder 280 causes the second rotating connecting rod 260 to rotate counterclockwise. The synchronous counterclockwise rotation of the first rotating connecting rod 250 and the second rotating connecting rod 260 causes the movable frame 220 to translate from right to left, thereby driving the first boom assembly 20 to rotate counterclockwise. The boom assembly 10 moves away from the second boom assembly 20 from right to left, thus completing the unfolding process. The shortening of the first drive cylinder 270 causes the first rotating link 250 to rotate clockwise, and the shortening of the second drive cylinder 280 causes the second rotating link 260 to rotate clockwise. The synchronous clockwise rotation of the first rotating link 250 and the second rotating link 260 causes the moving frame 220 to translate from left to right, thereby moving the first boom assembly 10 closer to the second boom assembly 20 from right to left, thus completing the folding process. It is evident that using the auxiliary folding and unfolding device 200 of the foldable boom 100 provided in this application can greatly save manpower and resources, while reducing disassembly and assembly steps, thereby improving disassembly and assembly efficiency.

[0089] In this application, unless otherwise stated, directional terms such as "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships, are generally based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of this application and for 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 limitations on the embodiments of this application. The directional terms "inner" and "outer" refer to the inside or outside relative to the outline of each component itself. In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0090] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0092] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An auxiliary folding and unfolding device for a foldable boom, characterized in that, include: Support frame (210); The movable frame (220) is movablely engaged with the support frame (210); A drive component for driving the moving frame (220) to move; The support frame (210) is used to connect to one of the boom components that are movable relative to the foldable boom (100), and the movable frame (220) is used to connect to the other.

2. The auxiliary folding and unfolding device for the foldable boom according to claim 1, characterized in that, The support frame (210) is provided with a moving track (240) extending along the switching path, and the bottom of the moving frame (220) is provided with a moving component (230) that moves in coordination with the moving track (240).

3. The auxiliary folding and unfolding device for the foldable boom according to claim 2, characterized in that, The moving track (240) is groove-shaped, and the moving component (230) includes a pulley (231). The axle (234) of the pulley (231) is connected to the moving frame (220), and the axis of the axle (234) is perpendicular to the bottom surface of the moving track (240). The diameter of the pulley (231) is equal to the groove width of the moving track (240).

4. The auxiliary folding and unfolding device for the foldable boom according to claim 1, characterized in that, The support frame (210) is provided with a support plate, and the bottom of the movable frame is provided with a ground wheel assembly that moves in coordination with the support plate.

5. The auxiliary folding and unfolding device for the foldable boom according to claim 1, characterized in that, The movable frame (220) is provided with a first rotating link (250) and a second rotating link (260) at both ends along the lateral direction. One end of the first rotating link (250) is pivotally connected to the support frame (210), and the other end is pivotally connected to the movable frame (220). One end of the second rotating link (260) is pivotally connected to the support frame (210), and the other end is pivotally connected to the movable frame (220).

6. The auxiliary folding and unfolding device for the foldable boom according to claim 5, characterized in that, The first rotating link (250) and the second rotating link (260) have the same length.

7. The auxiliary folding and unfolding device for the foldable boom according to claim 5, characterized in that, The first rotating link (250) and the second rotating link (260) are at the same height and are lower than the height of the moving frame (220).

8. The auxiliary folding and unfolding device for the foldable boom according to claim 5, characterized in that, The support frame (210) is provided with a first fixed seat (211) and a second fixed seat (212) arranged longitudinally at intervals. The first fixed seat (211) and the second fixed seat (212) are located on the same side of the movable frame (220) in the transverse direction. The movable frame (220) is provided with a first connecting seat (221) and a second connecting seat (222) arranged longitudinally at intervals. The distance between the first fixed seat (211) and the first connecting seat (221) is equal to the distance between the second fixed seat (212) and the second connecting seat (222). The first fixed seat (211) and the first connecting seat (221) are respectively connected to the two ends of the first rotating link (250). The second fixed seat (212) and the second connecting seat (222) are respectively connected to the two ends of the second rotating link (260).

9. The auxiliary folding and unfolding device for the foldable boom according to claim 8, characterized in that, The support frame (210) is provided with a first cylinder seat (213) and a second cylinder seat (214) arranged longitudinally at intervals. The first cylinder seat (213) and the first fixed seat (211) are located on the same side of the moving frame (220) in the transverse direction. The second cylinder seat (214) and the second fixed seat (212) are located on the same side of the moving frame (220) in the transverse direction. The first rotating link (250) is provided with a first mounting seat (251) in the middle. The second rotating link (260) is provided with a second mounting seat (263) in the middle. The drive assembly includes a first drive cylinder (270) and a second drive cylinder (280). The first drive cylinder (270) connects the first cylinder seat (213) and the first mounting seat (251). The second drive cylinder (280) connects the second cylinder seat (214) and the second mounting seat (263).

10. The auxiliary folding and unfolding device for the foldable boom according to claim 1, characterized in that, The top of the mobile frame (220) and the top of the support frame (210) are both provided with support components for connecting the boom assembly.

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