Aerial work assembly and aerial work vehicle

Abstract

The utility model relates to a kind of aerial work vehicles for the work carried out at high altitude. According to the aerial work vehicle of the utility model, comprising: the vehicle with bearing platform;And aerial work component is installed on bearing platform. Aerial work component includes: shovel, operator can board on shovel. And cantilever module, it is used to move shovel to work area in three-dimensional space. Cantilever module is provided with multistage cantilever, multistage cantilever has the shovel installed at one end, and while expanding and retracting, shovel is moved to work area in three-dimensional space. When cantilever module is positioned on bearing platform in the state that multistage cantilever retracts, cantilever module is obliquely positioned relative to the center line of vehicle parallel to the longitudinal direction of vehicle.

Description

Technical Field

[0001] This disclosure relates to an aerial work platform vehicle, and more particularly to an aerial work platform vehicle suitable for operations performed at heights. Background Technology

[0002] Aerial work platforms are used for tasks performed at heights, such as construction, inspection, and maintenance. For example, aerial work platforms can be used for cable installation, sign installation, tree trimming, and street light installation, but they can also be used for specialized operations such as on-site line maintenance of high-voltage power distribution lines, installation of power service lines, operation of hydraulic tools, and installation of pole-mounted transformers.

[0003] Such aerial work platforms may include vehicles equipped with a platform and aerial work components mounted on the platform. The aerial work components may include a bucket that workers can climb onto and a cantilever module that moves the bucket in three-dimensional space to the work area. The cantilever module may include a telescopic multi-stage cantilever.

[0004] In a typical aerial work platform vehicle, the multi-stage boom is installed along the vehicle's centerline in the longitudinal direction, and the bucket is installed at the far end of the uppermost cantilever segment of the multi-stage boom.

[0005] The size of the aerial work platform that can be mounted on the platform can be determined based on the vehicle's loading capacity. Furthermore, since the aerial work platform must be mounted on the platform with limited dimensions, there may be additional design constraints on the aerial work vehicle.

[0006] In particular, aerial work platforms with small loading capacity (such as 1-ton vehicles) have several problems caused by the narrow platform space, such as weak physical strength of the bucket, bucket protruding beyond the platform, potential imbalance depending on the bucket's installation position, and limitations on the length of multi-stage cantilever booms.

[0007] Specifically, the bucket, being a rectangular box with an open top, lacks sufficient physical strength and is prone to twisting or turning.

[0008] Typically, the multi-stage boom is mounted on the platform along the vehicle's centerline, parallel to its longitudinal direction, and the bucket is mounted on the foremost boom of the multi-stage boom. However, if the bucket is mounted at the far end of the foremost boom, it may protrude beyond the platform in the vehicle's longitudinal direction. Because there are constraints on the protruding length of the bucket mounted at the far end of the retracted multi-stage boom and protruding beyond the platform, the length of the retracted multi-stage boom must be designed to be shorter based on the bucket's length.

[0009] When the bucket is installed on one side of the foremost cantilever segment to address the aforementioned issues, the center of gravity of the aerial work platform assembly is offset to the side where the bucket is located. In this case, the risk of safety accidents caused by weight imbalance increases during the operation of the aerial work platform vehicle.

[0010] On the other hand, since multi-stage booms are driven by a telescopic mechanism using a cable, rollers are mounted on one side of the far end of each boom segment to suspend and guide the cable. In this case, the far end of the retracted boom segment with the collecting roller can protrude beyond the front end of the multi-stage boom. Therefore, when mounting the aerial work platform, shorter boom segments must be used to meet the constraint on the length of the protrusion beyond the platform while considering the protrusion caused by the rollers, in order to connect the bucket to the multi-stage boom. This results in a loss of length for the extended multi-stage boom and a reduction in the maximum working height that the multi-stage boom can achieve.

[0011] In addition, the cross-sections of cantilever segments, including multi-stage cantilevers, are typically rectangular or circular, which makes multi-stage cantilevers structurally susceptible to mechanical stresses such as torsion or bending.

[0012] [Prior Art References] [Patent Literature] (Patent Document 1) Korean Patent Publication No. 10-0822286 (registered on April 8, 2008) (Patent Document 2) Korean Patent Publication No. 10-1812974 (registered on December 21, 2017) (Patent Document 3) Korean Patent Publication No. 10-2529827 (registered on May 2, 2023). Utility Model Content

[0013] Technical issues

[0014] One object of this disclosure is to provide an aerial work platform that enables the stable installation of aerial work components while meeting design constraints that may be critical due to the limited size of the platform.

[0015] Another objective of this disclosure is to provide an aerial work vehicle with a physically robust bucket.

[0016] Another object of this disclosure is to provide an aerial work platform that minimizes the loss of length of the cantilever segment that may be caused by rollers mounted at the distal end of the cantilever segment.

[0017] Another object of this disclosure is to provide an aerial work vehicle with a multi-stage cantilever that exhibits excellent mechanical durability against stresses such as torsion and bending.

[0018] Technical solution

[0019] According to one aspect of an exemplary embodiment for achieving the above objectives, an aerial work vehicle is provided, the aerial work vehicle comprising: a vehicle including a platform; and an aerial work assembly mounted on the platform.

[0020] The aerial work platform includes: a bucket, which an operator can climb onto; and a boom module comprising a multi-stage boom having an end on which the bucket is mounted and being able to extend and retract to move the bucket in three-dimensional space to the work area, and the boom module being configured to be tilted relative to the centerline of the vehicle parallel to its longitudinal direction when the multi-stage boom is retracted and parked on the platform.

[0021] The cantilever module includes: a drive platform mounted on the support platform and capable of horizontal rotation; a rotating frame mounted on the drive platform and having a polygonal prism shape with an internal hollow portion; and the multi-stage cantilever connected to the rotating frame.

[0022] The bucket can be mounted on the transverse surface of the foremost cantilever segment of the multi-stage boom. This transverse surface corresponds to a surface in a relatively wide space facing the platform from the perspective of the multi-stage boom, where the multi-stage boom is tilted when retracted and parked on the platform.

[0023] The bucket may have a box shape with a trapezoidal cross section and may be mounted such that the surface of the longer of the two parallel edges based on the trapezoid can face the transverse surface of the foremost cantilever segment.

[0024] The foremost cantilever segment and the bucket can be made of insulating material.

[0025] The multi-stage cantilever may include the plurality of cantilever segments that can be telescopically extended and retracted via the rollers and the line.

[0026] When the multi-stage cantilever retracts as the multiple cantilever segments are nested, the rollers mounted at the distal ends of the multiple cantilever segments can be collected in one location.

[0027] Each of the plurality of cantilever segments on which the roller is mounted is provided with a roller shell mounted at the distal end of the cantilever segment to protect the roller.

[0028] The cantilever segment's roller shells preceding the final roller shell can be inserted sequentially and nested within the final roller shell.

[0029] The roller housing may include a roller receiving portion configured to receive the roller; and a stop member coupled to the roller receiving portion.

[0030] The stop can be positioned closer to the inlet opening of the corresponding cantilever segment than the roller receiving portion. When the cantilever segment is retracted and nested, the roller receiving portion of the roller shell can be nested, and the stops are stacked sequentially and protrude outwards.

[0031] Each of the cantilever segments may have a tubular structure having a polygonal cross-section with more than six sides.

[0032] The cantilever module may include an upper cylinder and a lower cylinder, the upper cylinder and the lower cylinder being configured to connect the last cantilever segment of the multi-stage cantilever to the rotating frame to adjust the vertical angle of the multi-stage cantilever.

[0033] The upper cylinder can connect the upper portion of the last cantilever segment to the distal end of the rotating frame with the intervention of an "X"-shaped first bracket mounted on the upper portion of the last cantilever segment of the multi-stage cantilever.

[0034] The lower cylinder can connect the lower part of the last cantilever segment to the middle part of the rotating frame with the intervention of the "X"-shaped second bracket installed on the lower part of the last cantilever segment.

[0035] The first support and the second support can be positioned close to the upper and lower ends of the last cantilever segment, respectively, in order to suppress torsional and bending deformation of the last cantilever segment.

[0036] Beneficial effects According to this disclosure, a bucket with a trapezoidal box shape is physically robust and exhibits improved torsional resistance compared to a conventional rectangular box bucket. That is, the bucket according to this disclosure has a trapezoidal bottom surface, which, compared to a conventional rectangular box bucket, allows for a reduction in the distance between opposing parallel sides and results in an asymmetrical region of opposing parallel sides, thereby exhibiting strong resistance to torsional stress.

[0037] Because the multi-stage cantilever of the aerial work platform is mounted at an angle on the horizontal plane of the platform, and the bucket is mounted on the relatively wide space of the platform when viewed from the angled multi-stage cantilever 70, the aerial work platform can be mounted stably while meeting design constraints that may be critical due to the limited size of the platform.

[0038] Furthermore, since the multi-stage cantilever is mounted at an angle on the platform, a longer multi-stage cantilever can be installed compared to the case where the multi-stage cantilever is installed along the centerline of the vehicle, which is parallel to the longitudinal direction of the vehicle.

[0039] The bucket is mounted on the transverse surface of the foremost cantilever segment, such that when viewed from the multi-stage cantilever, the bucket is positioned within a relatively wide space of the platform. Therefore, the multi-stage cantilever and bucket can be mounted on the platform while taking weight balance into account, and the bucket's protrusion through the platform can be minimized. Furthermore, because the bucket has a box shape with a trapezoidal cross-section and is mounted such that the surface with a relatively wide area of ​​one of the two parallel surfaces can face one of the transverse surfaces of the foremost cantilever segment, the bucket can be stably held at the foremost cantilever segment.

[0040] Compared to conventional configurations where each equipped roller cantilever segment cumulatively protrudes from the multistage cantilever, the collection of the roller-equipped distal ends of the cantilever segments reduces the protrusion length of the distal ends of the roller-equipped distal ends of the nested cantilever segments from the multistage cantilever. This reduction in protrusion allows each cantilever segment to be designed to be longer than conventional cantilever segments, and enables an increased reach of the multistage cantilever compared to existing multistage cantilever designs.

[0041] Because the cantilevered sections of the roll are protected from the external environment by the nested roll shell, the risk of contamination, malfunction, and damage to the roll caused by exposure to the external environment can be reduced.

[0042] Because each of the cantilever segments has a polygonal prism structure with a polygonal cross-section having more than six sides, the cantilever segment can provide excellent mechanical durability against stresses such as torsion and bending.

[0043] Because the brackets used to connect the upper and lower cylinders to adjust the vertical angle of the multi-stage cantilever are mounted in an "X" shape on the upper and lower surfaces of the last cantilever segment respectively, the upper and lower cylinders can be securely connected to the upper and lower parts of the base cantilever of the multi-stage cantilever. Therefore, when the multi-stage cantilever is raised and lowered by the upper and lower cylinders, the "X"-shaped brackets can provide excellent mechanical durability against stresses such as torsion and bending. Attached Figure Description

[0044] Figure 1 This is a perspective view of an aerial work vehicle according to an exemplary embodiment of the present disclosure; Figure 2 Is Figure 1 A three-dimensional view of an aerial work vehicle in a multi-stage cantilever extension configuration. Figure 3 yes Figure 1 A plan view of the aerial work platform vehicle; Figure 4 yes Figure 1 A side view of an aerial work vehicle; Figure 5 yes Figure 1 A three-dimensional view of the bucket shown; Figure 6 yes Figure 1 A three-dimensional view of the rotating frame shown; Figure 7 It is along Figure 6 The cross-sectional view taken by line 7-7 shown; Figure 8 yes Figure 1 A perspective view of the lower part of the multi-stage cantilever shown; Figure 9 yes Figure 1 A three-dimensional view of the front end of the multi-stage cantilever shown; Figure 10 yes Figure 9 A three-dimensional view of the multi-stage cantilever in its retracted state; and Figure 11 yes Figure 9 A three-dimensional view of a multi-stage cantilever in its extended state. Detailed Implementation

[0045] In the following description and accompanying drawings, only the parts necessary for understanding the embodiments of this disclosure will be described, and for simplicity, detailed descriptions of well-known functions or configurations that may obscure the subject matter of this disclosure will be omitted.

[0046] The terms and words used in the following description and this application are not necessarily to be interpreted in their ordinary or dictionary sense, but may be appropriately defined herein as terms used to describe this disclosure in the best possible manner. These terms and words should be interpreted as having meanings and concepts consistent with the technical ideas of this disclosure. The embodiments described in this specification and the configurations shown in the accompanying drawings are merely preferred embodiments of this disclosure and are not intended to limit the technical ideas of this disclosure. Therefore, it should be understood that various equivalents and modifications may exist that can replace the exemplary embodiments at the time of filing this application.

[0047] In the following, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0048] Figure 1 This is a perspective view of an aerial work vehicle according to an exemplary embodiment of the present disclosure. Figure 2 Is Figure 1 The image shows a three-dimensional view of an aerial work vehicle in a multi-stage cantilever extension configuration. Figure 3 yes Figure 1 A plan view of the aerial work vehicle. Figure 4 yes Figure 1 A side view of an aerial work vehicle.

[0049] Reference Figures 1 to 4 The aerial work platform 100 according to this embodiment may include a vehicle 10 having a platform 13 and an aerial work assembly 20 mounted on the platform 13. Here, the aerial work assembly 20 may include a bucket 30 that a worker can climb onto, and a cantilever module 40 for moving the bucket 30 in three-dimensional space to the work area. The cantilever module 40 may include a multi-stage cantilever 70, having an end on which the bucket 30 is mounted, and is capable of extending and retracting relative to the other end to move the bucket 30 in three-dimensional space to the work area. When the multi-stage cantilever 70 is retracted and parked on the platform 13, the cantilever module 40 may be positioned obliquely relative to the centerline of the vehicle 10, parallel to the longitudinal direction of the vehicle 10.

[0050] Furthermore, the aerial work vehicle 100 according to this embodiment may include at least one of one or more outriggers 91, battery pack 93, hydraulic tank 95 and control box 97, but this disclosure is not limited thereto.

[0051] Now refer to Figures 1 to 11 The aerial work vehicle 100 according to this embodiment will be described in more detail.

[0052] Vehicle 10 is a transport device for aerial work platform 100. For example, vehicle 10 can be an internal combustion engine vehicle, an electric vehicle, or a hybrid electric vehicle. Vehicle 10 may include a body 11 and a platform 13 located behind the body 11. The body 11 may include a driver's cab and additional components required to drive vehicle 10. The platform 13 provides space for mounting aerial work components 20. The platform 13 may be the loading space of vehicle 10, a chassis or frame on which the body 11 is mounted.

[0053] When the aerial work platform 20 is in operation, the extension brackets 91 can support the vehicle 10. These extension brackets 91 can be installed on the sides of the support platform 13. Specifically, the extension brackets 91 can be installed on the left and right sides at the front and rear ends of the support platform 13 to be expandable and retractable, thereby stably supporting the vehicle 10 and thus supporting the aerial work platform 100 on the ground.

[0054] Battery pack 93 supplies the electrical energy required for the operation of aerial work platform 100. Battery pack 93 can be a lead-acid battery or a secondary battery. In the case that vehicle 10 is an electric vehicle or a hybrid electric vehicle, battery pack 93 can be based on a secondary battery.

[0055] The hydraulic tank 95 can be mounted on the support platform 13 to supply the hydraulic pressure required to drive the upper cylinder 81 and the lower cylinder 83 to extend or retract the multi-stage cantilever 70.

[0056] The control box 97 allows the operator to control the operation of the aerial work vehicle 100. The control box 97 is equipped with one or more valves, one or more levers, one or more buttons, and / or one or more joysticks for operating the aerial work assembly 20 and / or the outrigger 91. The control box 97 may be equipped with a display device, such as a light-emitting diode (LED) with a touchscreen, which allows the operator to check the operating status of the aerial work assembly 20 and / or the outrigger 91. When the LED with a touchscreen is used as the display device, the touchscreen can be used as an input device, and input devices such as valves, levers, buttons, and / or joysticks can be omitted.

[0057] The aerial work assembly 20 may include the bucket 30 and the cantilever module 40 as described above.

[0058] Figure 5 yes Figure 1 A perspective view of the bucket 30 shown. (Refer to...) Figure 5 The bucket 30 has a box shape with a trapezoidal cross section.

[0059] The bucket 30 is implemented in a trapezoidal box shape because, compared to a conventional rectangular box bucket, this shape is physically robust and exhibits improved torsional resistance. In other words, the bucket 30 according to this embodiment has a trapezoidal bottom surface, which, compared to a conventional rectangular box bucket, reduces the distance between opposing parallel sides and results in an asymmetrical region of opposing parallel sides, thereby exhibiting strong resistance to torsional stress.

[0060] The bucket 30 can be made of insulating material to ensure safe operation by workers during on-site work. The edges of the bucket 30 can be rounded instead of sharp angles to suppress sparks that may be caused by current leakage during on-site wiring work. To enhance the structural strength of the bucket 30, it can have a plurality of reinforcing bars 33 formed on its outer surface and arranged vertically. Therefore, the bucket 30 can include a box-shaped bucket body 31 with a trapezoidal cross-section and a plurality of reinforcing bars 33 formed vertically on at least one of the outer surfaces of the bucket body 31.

[0061] The cantilever module 40 may include a drive platform 50, a rotating frame 60, and a multi-stage cantilever 70. The drive platform 50 may be mounted on the support platform 13 and may rotate horizontally. The rotating frame 60 may be mounted on the drive platform 50 and has a polygonal prism shape with an internal hollow portion 62a. The multi-stage cantilever 70 may be connected to the rotating frame 60.

[0062] In addition, the cantilever module 40 may also include an upper cylinder 81 and a lower cylinder 83.

[0063] like Figure 3As shown, the drive platform 50 can be mounted on the support platform 13 such that its center is located on the centerline of the vehicle 10, parallel to the longitudinal direction of the vehicle 10. The drive platform 50 rotates clockwise or counterclockwise according to the rotational power received from the motor. The drive platform 50 can have a disc shape.

[0064] The rotating frame 60 can be mounted on the drive platform 50. The rotating frame 60 can be mounted with a certain tilt angle relative to the drive platform 50. Therefore, when the rotating frame 60 rotates on the drive platform 50, it can produce a conical trajectory when viewed from the side or rear of the vehicle 10. Various devices mounted on the body 11 and the support platform 13 can be positioned below the rotation trajectory of the rotating frame 60 and the multi-stage cantilever 70.

[0065] The rotating frame 60 can be realized by a polygonal prism structure having an internal hollow portion 62a, such as Figure 6 and Figure 7 As shown. Here, Figure 6 yes Figure 1 The three-dimensional view of the rotating frame 60 shown. Figure 7 It is along Figure 6 The cross-sectional view taken by line 7-7 is shown.

[0066] In other words, the rotating frame 60 can have a tubular shape with one side open. The multi-stage cantilever 70 can be installed in the open portion of the rotating frame 60 with the intervention of the upper cylinder 81 and the lower cylinder 83. That is, the rotating frame 60 can be a tubular member with a "U"-shaped polygonal cross-section. The open portion of the rotating frame 60 can be formed along the longitudinal direction of the rotating frame 60.

[0067] The internal hollow portion 62a formed in the rotating frame 60 helps to reduce the overall weight of the rotating frame 60. In addition, since the rotating frame 60 can be formed by bending a metal plate into a polygonal prism structure, the rotating frame 60 can exhibit excellent mechanical durability against stresses such as torsion and bending.

[0068] The rotating frame 60 may include a support plate 61 connected to the drive stage 50 and a frame shaft 62 connected to the support plate 61. The frame shaft 62 may include a base shaft 63 having a "U"-shaped polygonal cross-section and a shaft wall plate 69 attached to the opposing inner surfaces of the base shaft 63 to form the inner wall of the internal hollow portion 62a.

[0069] The base shaft 63 may include a pair of shaft plates 64 facing each other and a connecting plate 67 connecting the pair of shaft plates 64. Each of the shaft wall plates 69 may be attached to a corresponding one of the inner surfaces of the shaft plates 64 to form the inner wall of the internal hollow portion 62a. The shaft plates 64 and the connecting plate 67 may be integrally formed by bending a single metal plate.

[0070] To allow one end of the multi-stage cantilever 70, which is connected to the upper portion of the rotating frame 60, to tilt relative to the rotating frame 60 while expanding or retracting, a portion of the connecting plate 67 is removed at the upper end of the base shaft 63 to form an opening 68. As a result, the upper portion of the shaft plate 64 is not directly connected to the connecting plate 67. These upper portions of the shaft plate 64 may be referred to as separation plates 65, and the remaining lower portion of the shaft plate 64 may be referred to as integral plate 66. The upper ends of the separation plates 65 may be connected to each other.

[0071] Upper cylinder 81 and lower cylinder 83 connect the final cantilever segment 72 of the multi-stage cantilever 70 to the rotating frame 60, allowing adjustment of the vertical angle of the multi-stage cantilever 70. Upper cylinder 81 connects the upper portion of the final cantilever segment 72 of the multi-stage cantilever 70 to the front end of the rotating frame 60. Here, upper cylinder 81 and the final cantilever segment 72 can be connected with the intervention of an "X"-shaped first bracket 85 mounted on the upper portion of the final cantilever segment 72. Lower cylinder 83 connects the lower portion of the final cantilever segment 72 to the middle portion of the rotating frame 60. Here, lower cylinder 83 and the final cantilever segment 72 can be connected with the intervention of an "X"-shaped second bracket 87 mounted on the lower portion of the final cantilever segment 72.

[0072] Each of the upper cylinder 81 and the lower cylinder 83 can be a hydraulic cylinder and can include a cylinder body and a cylinder rod. The cylinder body of the upper cylinder 81 can be rotatably mounted on a pair of separate plates 65, and the cylinder rod of the upper cylinder 81 can be connected to a first bracket 85. The cylinder body of the lower cylinder 83 can be rotatably mounted on a pair of integral plates 66, and the cylinder rod of the lower cylinder 83 can be connected to a second bracket 87.

[0073] Since the first bracket 85 and the second bracket 87 are positioned close to the upper and lower ends of the last cantilever segment 72, respectively, and are installed on the upper and lower surfaces of the last cantilever segment 72 in an "X" shape, the first bracket 85 and the second bracket 87 can suppress the torsional and bending deformation of the last cantilever segment 72 that may occur when the multi-stage cantilever 70 is expanded or retracted by the operation of the upper cylinder 81 and the lower cylinder 83, or when the rotating frame 60 rotates.

[0074] Because the multi-stage cantilever 70, connected to the rotating frame 60, can pivot vertically about the proximal end of the last cantilever segment 72, the lower cylinder 83, connected to the distal end of the last cantilever segment 72, is longer than the upper cylinder 81, connected to the proximal end of the last cantilever segment 72. Simultaneously, since the lower cylinder 83 provides most of the lifting force required to raise the multi-stage cantilever 70, it has a larger capacity than the upper cylinder 81. The upper cylinder 81 serves a supplementary role, thereby stabilizing the vertical movement of the multi-stage cantilever 70 as it is raised or lowered via the lower cylinder 83.

[0075] like Figures 8 to 11As shown, the multi-stage cantilever 70 may include multiple cantilever segments 71, which can be extended and retracted telescopically via rollers 75 and lines. Here, Figure 8 yes Figure 1 A perspective view of the lower part of the multi-stage cantilever 70 shown. Figure 9 yes Figure 1 A perspective view of the front end of the multi-stage cantilever 70 shown. Figure 10 yes Figure 9 A three-dimensional view of the multi-stage cantilever 70 in its retracted state. Figure 11 yes Figure 9 A three-dimensional view of the multi-stage cantilever 70 in its extended state.

[0076] The multi-stage cantilever 70 may include a final cantilever segment 72 connected to the rotating frame 60, one or more intermediate cantilever segments 73 sequentially inserted into the final cantilever segment 72, and a foremost cantilever segment 74 positioned within the intermediate cantilever segments 73. The final cantilever segment 72 is the outermost cantilever segment of the multi-stage cantilever 70. For example, the multi-stage cantilever 70 according to this embodiment may include two intermediate cantilever segments 73.

[0077] When the multi-stage cantilever 70 is extended, the middle cantilever segment 73 and the foremost cantilever segment 74 can be extended by the same length relative to the last cantilever segment 72.

[0078] Since the final cantilever segment 72 is mounted on the rotating frame 60 with the intervention of the upper cylinder 81 and the lower cylinder 83, the final cantilever segment 72 can be non-expandable. The intermediate cantilever segment 73 and the foremost cantilever segment 74 can be nested and sequentially inserted into the final cantilever segment 72.

[0079] The proximal end of the final cantilever segment 72 can be connected via the upper cylinder 81 to the upper end between a pair of shaft plates 64. In other words, the final cantilever segment 72 can be configured such that the proximal end of the final cantilever segment 72 inserts into an opening 68 between a pair of separator plates 65, and the upper surfaces of the pair of separator plates 65 and the proximal portion of the final cantilever segment 72 can be connected to the upper cylinder 81. The lower surfaces of the integral plate 66 and the distal portion of the final cantilever segment 72 can be connected to the lower cylinder 83.

[0080] When the multi-stage boom 70 is in the retracted state and positioned on the support platform 13, the multi-stage boom 70 can be tilted downwards, so that the proximal end of the last boom segment 72 is positioned higher than the distal end. At this time, the cylinder rod of the upper cylinder 81 can be in the extended state, and the cylinder rod of the lower cylinder 83 can be in the retracted state. The bucket 30 is mounted on the foremost boom segment 74 located near the distal end of the last boom segment 72.

[0081] The expansion and retraction of the upper cylinder 81 and the lower cylinder 83 occur in opposite directions. That is, when the multi-stage cantilever 70 is in the retracted state and tilted, the retraction of the upper cylinder 81 and the expansion of the lower cylinder 83 cause the front end of the multi-stage cantilever 70 to move upward. Conversely, the expansion of the upper cylinder 81 and the retraction of the lower cylinder 83 cause the front end of the multi-stage cantilever 70 to move downward.

[0082] The bucket 30 can be mounted on the lateral surface of the foremost cantilever segment 74. The lateral surface of the foremost cantilever segment 74 corresponds to the surface of a relatively wide space facing the platform 13 from the perspective of the multi-stage cantilever 70, which is tilted when the multi-stage cantilever 70 is retracted and parked on the platform 13.

[0083] If the bucket 30 is mounted on the transverse surface of the foremost cantilever segment 74 such that the bucket 30 is positioned in the relatively wide space of the platform 13 when viewed from the multi-stage cantilever 70 as described above, the weight imbalance caused by the tilted positioning of the multi-stage cantilever 70 relative to the centerline of the vehicle 10 parallel to the longitudinal direction of the vehicle 10 can be minimized, while also minimizing the protrusion of the bucket 30 beyond the platform 13.

[0084] As described above, the bucket 30 has a box shape with a trapezoidal cross-section. Since the bucket 30 is mounted such that the surface of the longer of the two parallel edges based on the trapezoid can face a transverse surface of the foremost cantilever segment 74, the bucket 30 can be stably held at the foremost cantilever segment 74.

[0085] Each cantilever segment 71 has a tubular structure with a polygonal cross-section having more than six sides. Therefore, the cantilever segment 71 can exhibit excellent mechanical durability against stresses (such as torsion and bending) that may occur during the expansion, retraction, or rotation of the cantilever segment. According to this embodiment, the cantilever segments 71, except for the foremost cantilever segment 74, can have a tubular shape, for example, having a decagonal cross-section. Specifically, each of the cantilever segments 71 can generally have a tubular shape having four faces—a top face, a bottom face, and two transverse faces—where each of the top and bottom faces can be formed as a multi-faceted surface with three or more facets. The top and bottom surfaces of the cantilever segment can be formed into an outwardly convex shape.

[0086] Because the foremost cantilever segment 74 is located at the innermost position in the multi-stage cantilever 70, it is protected by the other cantilever segments 71 surrounding it and is relatively less affected by mechanical stresses such as torsion or bending than the other cantilever segments 71. Considering these installation conditions, the foremost cantilever segment 74 can have a tubular shape with a rectangular cross-section.

[0087] For the aerial work vehicle 100 according to this embodiment used in on-site line operations, the foremost cantilever segment 74 can be implemented by a cantilever segment 71 made of insulating material.

[0088] With the multi-stage cantilever 70 retracted as multiple cantilever segments 71 are nested, rollers 75 mounted at the distal ends of the multiple cantilever segments 71 are collected in one location. Compared to a conventional configuration where each cantilever segment 71 equipped with existing rollers 75 protrudes cumulatively, the collection of the distal ends of the cantilever segments 71 with mounted rollers 75 reduces the protruding length of the distal ends of the nested cantilever segments 71 from the multi-stage cantilever 70. This reduction in protrusion allows each cantilever segment 71 to be designed longer than conventional cantilever segments, and enables an increased reach of the multi-stage cantilever 70 compared to existing multi-stage cantilever designs.

[0089] Each cantilever segment 71 on which the roller 75 is mounted is provided with a roller shell 76 installed at the distal end of the cantilever segment 71 to protect the roller 75. The roller shell 76 of the cantilever segment 71 preceding the last cantilever segment 72 is sequentially inserted into and nested in the roller shell 76 of the last cantilever segment 72. A stop 78 may be provided at the inlet opening 71a of each cantilever segment 71 that allows insertion into the distal end of another cantilever segment to ensure stable insertion and nesting of the roller shell 76 as the preceding roller shell 76 is sequentially inserted into and nested in the last roller shell 76. The stop 78 may be provided at the roller shell 76 of the cantilever segment 71 inserted into another cantilever segment. During the retraction and nesting of the cantilever segments, the stop 78 of the inserted preceding cantilever segment 71 can be locked and fixed by the stop 78 of the other cantilever segment 71 that houses the preceding cantilever segment.

[0090] The roller housing 76 may include a roller receiving portion 77 adapted to receive the roller 75 and a stop 78 connected to the roller receiving portion 77. The stop 78 may be positioned closer to the inlet opening 71a of the cantilever segment 71 than the roller receiving portion 77. When the cantilever segment 71 is retracted and nested, the roller receiving portion 77 of the roller housing 76 is nested, and the stop 78 is stacked in sequence and protrudes outward.

[0091] Furthermore, since the roller 75 of the cantilever segment 71 is protected from the influence of the external environment by the nested roller shell 76, the risk of contamination, malfunction, or damage to the roller 75 caused by exposure to the external environment can be reduced.

[0092] The description in this disclosure is exemplary in nature only, and therefore, variations without departing from the spirit of this disclosure are intended to fall within its scope. Such changes should not be considered as departing from the spirit and scope of this disclosure. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the spirit and scope defined by this application.

[0093] [Explanation of reference numerals in the attached figures] 10: Vehicle, 11: Body 13: Support platform; 20: Aerial work assembly 30: Bucket; 31: Bucket body 33: Reinforcing bar; 40: Cantilever module 50: Drive stage, 60: Rotating frame 61: Support plate; 62: Frame shaft 62a: Internal hollow part; 63: Base shaft 64: Shaft plate, 65: Separation plate 66: Overall board; 67: Connecting board 68: Opening; 69: Shaft wall plate 70: Multi-stage cantilever; 71: Cantilever segment 71a: Entrance opening; 72: Last cantilever segment 73: Middle cantilever segment; 74: Foremost cantilever segment 75: Roller, 76: Roller shell 77: Roller receiving part; 78: Stopping element 81: Upper cylinder, 83: Lower cylinder 85: First support; 87: Second support 91: Extended support bracket; 93: Battery pack 95: Hydraulic box; 97: Control box 100: Aerial work vehicles

Claims

1. A high-altitude work assembly, characterized in that, The aerial work platform assembly is used on an aerial work vehicle and is mounted on the platform of the aerial work vehicle. The aerial work platform assembly includes: Bucket, on which the operator can climb; and The cantilever module includes a multi-stage cantilever, each stage having an end on which the bucket is mounted and capable of extending and retracting to move the bucket in three-dimensional space to the work area. The multi-stage cantilever comprises multiple cantilever segments, which can be extended and retracted telescopically via rollers and lines. When the multi-stage cantilever retracts as the multiple cantilever segments are nested, the rollers installed at the distal ends of the multiple cantilever segments collect at one location. Each of the plurality of cantilever segments on which the roller is mounted is provided with a roller shell installed at the distal end of the cantilever segment to protect the roller. In this configuration, the roll shells of the cantilever segment preceding the final roll shell are sequentially inserted into and nested within the final roll shell.

2. The high-altitude work assembly according to claim 1, characterized in that, When the multi-stage cantilever retracts and rests on the support platform, the cantilever module is positioned at an angle relative to the centerline of the vehicle, which is parallel to the longitudinal direction of the vehicle.

3. The high-altitude work assembly according to claim 2, characterized in that, The cantilever module includes: A drive platform, which is mounted on the support platform and is capable of horizontal rotation; A rotating frame, mounted on the drive platform, having a polygonal prism shape with an internal hollow portion; and The multi-stage cantilever is connected to the rotating frame.

4. The high-altitude work assembly according to claim 2, characterized in that, The bucket is mounted on the transverse surface of the foremost cantilever segment of the multi-stage cantilever. The lateral surface corresponds to the surface in a relatively wide space facing the support platform from the perspective of the multi-stage cantilever, and the multi-stage cantilever is tilted when it is retracted and placed on the support platform.

5. The high-altitude work assembly according to claim 4, characterized in that, The bucket has a box shape with a trapezoidal cross-section and is mounted such that the surface of the longer of the two parallel edges of the trapezoid can face the transverse surface of the foremost cantilever segment.

6. The aerial work platform assembly according to claim 5, characterized in that, The foremost cantilever segment and the bucket are made of insulating material.

7. The high-altitude work assembly according to claim 1, characterized in that, The roller shell includes: A roller receiving portion, the roller receiving portion being configured to receive the roller; and A stop element, which is connected to the roller receiving portion, The stop is positioned closer to the inlet opening of the corresponding cantilever segment than the roller receiving portion. When the cantilever segment is retracted and nested, the roller receiving portion of the roller shell is nested, and the stop members are stacked in sequence and protrude outward.

8. The high-altitude work assembly according to claim 1, characterized in that, Each of the cantilever segments has a tubular structure with a polygonal cross-section having more than six sides.

9. The high-altitude work assembly according to claim 3, characterized in that, The cantilever module also includes: An upper cylinder and a lower cylinder are configured to connect the final cantilever segment of the multi-stage cantilever to the rotating frame to adjust the vertical angle of the multi-stage cantilever. The upper cylinder connects the upper part of the last cantilever segment to the front end of the rotating frame with the intervention of the "X"-shaped first bracket mounted on the upper part of the last cantilever segment of the multi-stage cantilever. The lower cylinder, with the intervention of an "X"-shaped second bracket mounted on the lower part of the last cantilever segment, connects the lower part of the last cantilever segment to the middle part of the rotating frame. The first support and the second support are positioned close to the distal and proximal ends of the last cantilever segment, respectively, to suppress torsional and bending deformation of the last cantilever segment.

10. An aerial work platform vehicle, characterized in that, The aerial work vehicles include: Including vehicles on the platform; and Aerial work assembly, the aerial work assembly being mounted on the support platform, The high-altitude operation component includes: Bucket, on which the operator can climb; and The cantilever module includes a multi-stage cantilever, each stage having an end on which the bucket is mounted and capable of extending and retracting to move the bucket in three-dimensional space to the work area. The multi-stage cantilever comprises multiple cantilever segments, which can be extended and retracted telescopically via rollers and lines. When the multi-stage cantilever retracts as the multiple cantilever segments are nested, the rollers installed at the distal ends of the multiple cantilever segments collect at one location. Each of the plurality of cantilever segments on which the roller is mounted is provided with a roller shell installed at the distal end of the cantilever segment to protect the roller. In this configuration, the roll shells of the cantilever segment preceding the final roll shell are sequentially inserted into and nested within the final roll shell.

Images