Aerial device jib structure and aerial device

Abstract

The embodiment of the application provides an arm support structure of a climbing equipment and the climbing equipment, and belongs to the technical field of climbing equipment. The arm support structure comprises a ladder arm and a ladder assembly. The ladder assembly comprises a ladder body and an auxiliary ladder slidingly arranged on the ladder body. A curved arm ladder assembly comprises a curved arm ladder body and a movable ladder slidingly arranged on the curved arm ladder body. One end of a curved arm member is hinged to the ladder arm, and the other end of the curved arm member is used for being connected to a working bucket of the climbing equipment. The movable ladder is configured to switch between a folded position and an unfolded position. In the folded position, the curved arm ladder body is located below the ladder body. In the unfolded position, the curved arm ladder body, the movable ladder, the auxiliary ladder and the ladder body are sequentially arranged along the sliding direction of the auxiliary ladder. The arm support structure of the embodiment of the application can compensate for the connection gap between the ladder and the curved arm ladder, thereby being beneficial to improving the safety performance.

Description

Technical Field

[0001] This application relates to aerial work platform technology, and more particularly to an aerial work platform boom structure and aerial work platform. Background Technology

[0002] Aerial fire trucks, ladder trucks, and other aerial firefighting equipment include booms, ladders, and work platforms. Both booms and ladders consist of multiple folding sections, with each boom section and ladder section connected to the other. Both booms and ladders are connected to the work platform, allowing workers to descend to the ground from the work platform via the ladder.

[0003] The ladder and the work bucket are connected by a curved arm ladder, and the boom and the work bucket are connected by a curved arm. Both the curved arm ladder and the curved arm are driven to rotate by a rotary drive component so that the work bucket can be unfolded or folded away relative to the ladder.

[0004] Due to structural limitations and interference from assembly space, the hinge points of the articulated ladder and the articulated arm are not concentric, resulting in a large gap between the deployed articulated ladder and the adjacent ladder, which poses a risk of workers and rescuers falling into the gap. Utility Model Content

[0005] This application provides a boom structure and climbing equipment for a climbing device, in order to solve the technical problem of the potential for misstepping caused by the gap between the articulated boom ladder and the ladder in the related art.

[0006] On one hand, this application provides a boom structure for a climbing device, comprising:

[0007] A ladder arm and a ladder assembly, wherein the ladder assembly includes a ladder body and an auxiliary ladder slidably disposed on the ladder body;

[0008] The articulated boom member and the articulated boom ladder assembly, wherein the articulated boom ladder assembly includes an articulated boom ladder body and a movable ladder slidably disposed on the articulated boom ladder body, one end of the articulated boom member is hinged to the ladder arm, and the other end of the articulated boom member is used to connect to the working bucket of the climbing equipment;

[0009] The movable ladder is configured such that, when the curved arm component rotates, it is driven by the curved arm ladder body to extend or retract relative to the curved arm ladder body, so as to switch between a folded position and an unfolded position. In the folded position, the curved arm ladder body is located below the cloud ladder body. In the unfolded position, the curved arm ladder body, the movable ladder, the auxiliary ladder, and the cloud ladder body are arranged sequentially along the sliding direction of the auxiliary ladder.

[0010] In some possible implementations, the articulated ladder assembly further includes:

[0011] A drive ladder is slidably mounted on the articulated ladder body. The drive ladder is configured to extend or retract relative to the articulated ladder body under external force. The extended drive ladder is used to connect with the work bucket.

[0012] In some possible implementations, the articulated ladder body is provided with a drive member, the drive ladder is provided with a connecting beam on the side opposite to the articulated ladder body, the drive end of the drive member is connected to the connecting beam, and the drive member is configured to drive the drive ladder to extend or retract relative to the articulated ladder body.

[0013] In some possible implementations, at least one of the ladder body and the articulated ladder body is provided with a first mating member, and at least one of the auxiliary ladder and the movable ladder is provided with a second mating member. The first mating member and the second mating member are slidably connected so that the ladder body and the auxiliary ladder are slidably connected, or the articulated ladder body and the movable ladder are slidably connected.

[0014] In some possible implementations, the first mating member is a slide rail, and the second mating member is a slider that engages with the first mating member; or, the first mating member is a slider, and the second mating member is a slide rail for engaging with the first mating member.

[0015] In some possible implementations, the auxiliary ladder has a first ear plate at the end facing the movable ladder, and the movable ladder has a second ear plate at the end facing the auxiliary ladder. The first ear plate and the second ear plate are connected by a common pivot, so that the auxiliary ladder and the movable ladder are hinged.

[0016] In some possible implementations, a curved arm support is also included, which includes a main rod, a connecting rod, and at least two support rods. One end of the main rod is connected to the curved arm, and the other end of the main rod is connected to at least two of the support rods via the connecting rod. At least two of the support rods are connected to the curved arm ladder body.

[0017] In some possible implementations, the crank arm includes:

[0018] Curved arm body;

[0019] A first reinforcing plate is connected to the articulated boom body, and the articulated boom body is hinged to the ladder arm through the first reinforcing plate.

[0020] The second reinforcing plate is connected to the articulated boom body, and the articulated boom body is hinged to the working bucket through the second reinforcing plate.

[0021] On the other hand, this application provides a climbing device, including a work bucket and a boom structure of the climbing device as described in any of the preceding claims connected to the work bucket.

[0022] In some possible implementations, a turntable is also included, on which a rotatable telescopic boom is provided, the telescopic boom being connected to a main boom ladder, and the telescopic boom being connected to the ladder arm of the boom structure.

[0023] The work bucket is connected to the articulated boom component of the boom structure via a counterweight arm. The work bucket is provided with an inlet / outlet opening for connecting the articulated boom ladder assembly. A rotatable flap is connected to the lower end of the inlet / outlet opening, and the flap is used to overlap with the articulated boom ladder assembly.

[0024] The boom structure and climbing equipment provided in this application feature a movable ladder and an auxiliary ladder that are hinged together in the boom structure. When the articulated boom rotates relative to the ladder arm, the movable ladder is driven by the articulated boom body to extend or retract relative to the articulated boom body. In the extended position, the articulated boom body, the movable ladder, the auxiliary ladder, and the ladder body are linearly connected in series along the sliding direction, automatically filling the physical gap between the articulated boom body and the ladder body, so that the two form a continuous passage path without breaks, eliminating the risk of falling into the air, and helping to enhance the overall safety performance of the boom structure and the climbing equipment. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0026] Figure 1 This is a schematic diagram of the movement process of the boom structure in the embodiments of this application;

[0027] Figure 2 This is a perspective view of the boom structure in the embodiments of this application;

[0028] Figure 3 This is an exploded view of the ladder assembly portion of the boom structure in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram showing the connection between the articulated boom ladder assembly and the articulated boom ladder in the boom structure of this application embodiment;

[0030] Figure 5 for Figure 4 Schematic diagram of the structure of the mid-arc arm support component;

[0031] Figure 6 This is a schematic diagram showing the state of the movable ladder in the unfolded position in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the overall structure of the climbing equipment in the embodiments of this application.

[0033] Explanation of reference numerals in the attached figures

[0034] 100-Ladder Arm;

[0035] 200-Ladder assembly; 210-Ladder body; 211-Slide track; 220-Auxiliary ladder; 221-Slider; 222-First ear plate;

[0036] 300 - Articulated boom assembly; 310 - Articulated boom body; 320 - First reinforcing plate; 330 - Second reinforcing plate;

[0037] 400 - Articulated ladder assembly; 410 - Articulated ladder body; 411 - Drive unit; 420 - Movable ladder; 421 - Second ear plate; 430 - Drive ladder; 431 - Connecting beam;

[0038] 500 - Articulated boom support; 510 - Main rod; 520 - Support rod; 530 - Connecting rod;

[0039] 600-turntable;

[0040] 700-Telescopic boom;

[0041] 800 - Working bucket; 810 - Inlet / outlet opening; 820 - Counterweight arm; 830 - Flip plate.

[0042] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0047] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0048] In current aerial work platforms, the ladder and the work bucket are connected by an articulated ladder, and the boom and the work bucket are connected by an articulated boom. Both the articulated ladder and the articulated boom are driven to rotate by a rotary drive component, so that the work bucket can be unfolded or folded away relative to the ladder.

[0049] Because the articulated boom ladder connects the ladder and the work bucket, and the articulated boom connects the boom and the work bucket, and the articulated boom ladder and the articulated boom rotate independently, a non-concentric hinge design is required due to the limitation of installation space. The rotation hinge points of the articulated boom ladder and the articulated boom are not concentric, resulting in a large gap between the deployed articulated boom ladder and the adjacent ladder, which easily causes the risk of workers and rescuers falling into the gap.

[0050] Based on the above description, one or more embodiments of this application provide a boom structure for a climbing device and a climbing device. In the boom structure, the movable ladder and the auxiliary ladder are hinged. When the articulated boom rotates relative to the ladder arm, the movable ladder is driven by the articulated boom body to extend or retract relative to the articulated boom body. In the extended position, the articulated boom body, the movable ladder, the auxiliary ladder and the ladder body are linearly connected in series along the sliding direction, automatically filling the physical gap between the articulated boom body and the ladder body, so that the two form a continuous passage path without breaks, eliminating the risk of falling into the air, and helping to enhance the overall safety performance of the boom structure and the climbing device.

[0051] The following description, in conjunction with the accompanying drawings, illustrates the solutions of the embodiments of this application.

[0052] like Figure 1 and Figure 2 As shown in the figure, this application provides a boom structure for a climbing device, including a ladder arm 100 and a ladder assembly 200, a curved boom member 300 and a curved boom ladder assembly 400.

[0053] The ladder assembly 200 includes a ladder body 210 and an auxiliary ladder 220 slidably mounted on the ladder body 210. The articulated ladder assembly 400 includes an articulated ladder body 410 and a movable ladder 420 slidably mounted on the articulated ladder body 410. One end of the articulated arm 300 is hinged to the ladder arm 100, and the other end of the articulated arm 300 is used to connect to the work bucket 800 of the climbing equipment.

[0054] The movable ladder 420 is configured to extend or retract relative to the articulated ladder body 410 when the articulated arm member 300 rotates, so as to switch between a folded position and an unfolded position. In the folded position, the articulated ladder body 410 is located below the ladder body 210. In the unfolded position, the articulated ladder body 410, the movable ladder 420, the auxiliary ladder 220 and the ladder body 210 are arranged sequentially along the sliding direction of the auxiliary ladder 220.

[0055] As can be seen from the above description, in this embodiment of the application, an auxiliary ladder 220 is slidably arranged on the ladder body 210, and a movable ladder 420 is slidably arranged on the articulated ladder body 410. The movable ladder 420 and the auxiliary ladder 220 are hinged together, thereby connecting the ladder body 210 and the articulated ladder body 410. When the articulated arm 300 rotates relative to the ladder arm 100, both the auxiliary ladder 220 and the movable ladder 420 slide, and at the same time, the hinge angle changes relative to each other. This compensates for the gap error between the ladder body 210 and the articulated ladder body 410, so that the two form a continuous passage path without breaks, eliminating the risk of falling into the air, and helping to enhance the overall safety performance of the boom structure and the climbing equipment.

[0056] like Figure 3 As shown, in some embodiments, at least one of the ladder body 210 and the articulated ladder body 410 is provided with a first mating member, and at least one of the auxiliary ladder 220 and the movable ladder 420 is provided with a second mating member. The first mating member and the second mating member are slidably connected so that the ladder body 210 and the auxiliary ladder 220 are slidably connected, or the articulated ladder body 410 and the movable ladder 420 are slidably connected.

[0057] The first mating component is a slide rail 211, and the second mating component is a slider 221 that engages with the first mating component; or, the first mating component is a slider 221, and the second mating component is a slide rail 211 that engages with the first mating component.

[0058] In this example, the auxiliary ladder 220 includes two parallel irregularly shaped tubes. Three parallel anti-slip square tubes are arranged at intervals on the two irregularly shaped tubes as steps. Handrails are installed on the irregularly shaped tubes. A slider 221 is provided on the outer end of the irregularly shaped tubes. A slide rail 211 extending along its own length is provided on the inner side of the ladder body 210. The two irregularly shaped tubes of the auxiliary ladder 220 are embedded between the ladder body 210, and the sliding connection between the auxiliary ladder 220 and the ladder body 210 is formed by the cooperation of the slider 221 and the slide rail 211.

[0059] Similarly, the movable ladder 420 includes two parallel irregularly shaped tubes. Three parallel anti-slip square tubes are arranged at intervals on the two irregularly shaped tubes as steps. Handrails are installed on the irregularly shaped tubes. A slider is provided on the outer end of the irregularly shaped tube. A slide rail extending along its own length is provided on the inner side of the curved arm ladder body 410. The two irregularly shaped tubes of the movable ladder 420 are embedded between the curved arm ladder body 410, and the movable ladder 420 and the curved arm ladder body 410 are slidably connected by the cooperation of the slider and the slide rail.

[0060] Figure 1 In the diagram, the arrows indicate the direction of rotation of the articulated boom 300 relative to the ladder arm 100. The sliding connections between the ladder body 210 and the auxiliary ladder 220, and between the articulated boom ladder body 410 and the movable ladder 420, are not driven or restricted by any other power source. As the dotted line indicates the articulated boom 300 rotates clockwise, it causes the auxiliary ladder 220 to slide relative to the ladder body 210, and also causes the movable ladder 420 to slide relative to the articulated boom ladder body 410. The auxiliary ladder 220 and the movable ladder 420 can maintain a continuous linear connection path at various tilt angles of the articulated boom 300, thereby ensuring that the ladder assembly 200 and the articulated boom ladder assembly 400 always maintain a seamless connection, effectively enhancing the safety of workers moving on the ladder assembly 200 and the articulated boom ladder assembly 400.

[0061] It should be noted that the "expanded position" in the embodiments of this application refers to, for example... Figure 6 As shown in the diagram, the articulated ladder body 410, movable ladder 420, auxiliary ladder 220, and cloud ladder body 210 are all located on the same plane. The folded position refers to the articulated ladder assembly 400 forming an angle of less than 180° with the cloud ladder assembly 200. In the folded position, the movable ladder 420 and the auxiliary ladder 220 can be... Figure 2 The vertical position shown in the diagram can also be the position at other angles, and can be flexibly set according to the actual working scenario.

[0062] like Figure 3 and Figure 4As shown, in some embodiments, the auxiliary ladder 220 is provided with a first ear plate 222 at one end facing the movable ladder 420, and the movable ladder 420 is provided with a second ear plate 421 at one end facing the auxiliary ladder 220. The first ear plate 222 and the second ear plate 421 are connected by a common pivot, so that the auxiliary ladder 220 and the movable ladder 420 are hinged.

[0063] Both sections of the irregularly shaped tubing on the auxiliary ladder 220 are equipped with first ear plates 222, and both ends of the irregularly shaped tubing on the movable ladder 420 are equipped with second ear plates 421. The first ear plates 222 and the second ear plates 421 on the same side are hinged together, thus forming a hinged connection between the auxiliary ladder 220 and the movable ladder 420. The first ear plates 222 and the second ear plates 421 can be fixed to the corresponding ends of the auxiliary ladder 220 and the movable ladder 420 by welding.

[0064] As an alternative implementation, the movable ladder 420 and the auxiliary ladder 220 are not connected. The movable ladder 420 is driven by a drive component mounted on the articulated ladder body 410, extending or retracting relative to the articulated ladder body 410. The auxiliary ladder 220 is driven by a drive component mounted on the ladder body 210, extending or retracting relative to the ladder body 210. Here, it is sufficient to reduce the gap between the ladder body 210 and the articulated ladder body 410. When a drive component is mounted on the articulated ladder body 410 or the ladder body 210, the driving action of the drive component can be adjusted by the operator according to the working scenario of the climbing equipment, or directly adjusted by an external control device. This will not be elaborated further in this embodiment.

[0065] like Figure 4 As shown in the embodiment of this application, the boom structure also includes a curved boom support member 500. The curved boom support member 500 includes a main rod 510, a connecting rod 530 and at least two support rods 520. One end of the main rod 510 is connected to the curved boom member 300, and the other end of the main rod 510 is connected to at least two support rods 520 through the connecting rod 530. At least two support rods 520 are connected to the curved boom ladder body 410.

[0066] like Figure 5 As shown, in the aforementioned curved arm support 500, the main rod 510, connecting rod 530, and support rod 520 can be made of square steel tubing. The main rod 510 and connecting rod 530 are welded together perpendicularly, and the connecting rod 530 is welded together perpendicularly with at least two support rods 520. The main rod 510, connecting rod 530, and at least two support rods 520 together form a "Y"-shaped structure, and the curved arm ladder body 410 is supported by at least two support rods 520.

[0067] Figure 4In the process, the main rod 510 and the articulated arm 300 can be connected by bolts that pass through both of them, and the support rod 520 and the articulated arm ladder body 410 can be connected by welding or by fasteners that pass through both of them.

[0068] As an alternative implementation, the support rods 520 can be three or other numbers. The length of the support rods 520 is not shorter than the width of the articulated ladder body 410, and the number of support rods 520 can be flexibly set according to the length of the articulated ladder body 410.

[0069] The main rod 510 bears the tensile and compressive forces in the axial direction, and at least two support rods 520 distribute the load to different anchoring points of the articulated ladder body 410. This avoids the stress concentration problem at the connection point that is easily caused by the direct connection between the articulated arm component 300 and the articulated ladder body 410. In addition, the at least two support rods 520 and the main rod 510 together form an approximately triangular connection structure, which further enhances the connection strength between the articulated arm support component 500 and the articulated ladder body 410.

[0070] like Figure 4 As shown in the embodiment of this application, the articulated boom component 300 includes an articulated boom body 310, a first reinforcing plate 320, and a second reinforcing plate 330. The first reinforcing plate 320 is connected to the articulated boom body 310, and the articulated boom body 310 is hinged to the ladder arm 100 through the first reinforcing plate 320; the second reinforcing plate 330 is connected to the articulated boom body 310, and the articulated boom body 310 is hinged to the work bucket 800 through the second reinforcing plate 330.

[0071] The aforementioned articulated boom body 310 is a welded integral part. The cross-section of the articulated boom body 310 is polygonal, and the number of the first reinforcing plate 320 and the second reinforcing plate 330 can be flexibly set.

[0072] For example, there are two or more first reinforcing plates 320. The multiple first reinforcing plates 320 are attached to the side wall of the articulated arm body 310 and arranged parallel to each other. The first reinforcing plate 320 is provided with a first axle pin hole, and the corresponding end of the ladder arm 100 is provided with a second axle pin hole. The ladder arm 100 and the articulated arm body 310 are rotatably connected by axle pins that pass through the first axle pin hole and the second axle pin hole.

[0073] The number of second reinforcing plates 330 can be two or more. Multiple second reinforcing plates 330 are attached to the side wall of the crank arm body 310 and arranged parallel to each other. The second reinforcing plates 330 are provided with third shaft pin holes. The working bucket 800 is used to connect the crank arm body 310 to a balance arm 820 at one end. The end of the balance arm 820 is provided with a fourth shaft pin hole. The crank arm body 310 and the balance arm 820 are rotatably connected by a shaft pin that passes through the third shaft pin hole and the fourth shaft pin hole.

[0074] By setting the first reinforcing plate 320 and the second reinforcing plate 330, the articulated boom body 310 has a larger installation space and better structural strength, which facilitates the assembly of the articulated boom body 310 and the ladder arm 100, and the articulated boom body 310 and the counterweight arm 820, reduces the assembly difficulty, and helps to improve assembly efficiency.

[0075] It should be noted that in some embodiments, the first reinforcing plate 320 is also provided with an assembly position for mounting the leveling cylinder and the crank arm rotating cylinder. The assembly position may be a through hole provided on the first reinforcing plate 320, or other mounting platform that can mount the leveling cylinder and the crank arm rotating cylinder. This application does not make an absolute limitation on this.

[0076] The installation of the leveling cylinder and the boom rotating cylinder can refer to the leveling components and rotating components in the relevant technology of aerial work equipment. The leveling cylinder is used to dynamically maintain the horizontal state of the working bucket 800, and the boom rotating cylinder is used to drive the boom 300 to rotate relative to the ladder arm 100.

[0077] like Figure 4 and Figure 6 As shown, in some embodiments, the articulated ladder assembly 400 further includes a drive ladder 430 slidably disposed on the articulated ladder body 410. The drive ladder 430 is configured to extend or retract relative to the articulated ladder body 410 under external force. The extended drive ladder is used to engage with the work bucket 800.

[0078] The connection method between the aforementioned drive ladder 430 and the articulated ladder body 410 can be set with reference to the connection method between the movable ladder 420 and the articulated ladder body 410. The articulated ladder body 410 is provided with a drive component 411. The drive ladder 430 is provided with a connecting beam 431 on the side opposite to the articulated ladder body 410. The drive end of the drive component 411 is connected to the connecting beam 431. The drive component 411 is configured to drive the drive ladder 430 to extend or retract relative to the articulated ladder body 410.

[0079] Here, the driving component 411 can be a hydraulic cylinder. When the driving component 411 drives the driving ladder 430 to extend out of the articulated ladder body 410, the extended end of the driving ladder 430 overlaps with the working bucket 800. When the driving component 411 drives the driving ladder 430 to retract into the articulated ladder body 410, the driving ladder 430 and the articulated ladder body 410 are stacked to avoid occupying extra space.

[0080] This application also provides an aerial work platform, including a work bucket 800 and a boom structure as described in any of the above embodiments connected to the work bucket 800. Because it includes the boom structure as described in any of the above embodiments, the aerial work platform possesses all the advantages of a boom structure.

[0081] like Figure 7As shown, in some embodiments, the climbing equipment also includes a turntable 600, on which a rotatable telescopic main boom 700 is provided. The telescopic main boom 700 is connected to a main boom ladder and is connected to the ladder arm 100 of the boom structure.

[0082] The work bucket 800 is connected to the boom arm 300 of the boom structure via a counterweight arm 820. The work bucket 800 is provided with an inlet / outlet opening 810 for connecting the boom arm ladder assembly 400. The lower end of the inlet / outlet opening 810 is connected to a rotatable flap 830, which is used to overlap with the boom arm ladder assembly 400.

[0083] The telescopic boom 700 is hinged to the turntable 600 via a pin. Both the telescopic boom 700 and the ladder arm 100 are driven to move in opposite directions by telescopic cylinders and luffing cylinders. The ladder arm corresponding to the telescopic boom 700 and the ladder assembly 200 corresponding to the ladder arm 100 move synchronously with the movement of the two.

[0084] Specifically, the telescopic boom 700 is connected to the turntable 600 via a tail pin; the ladder arm 100 is connected to the telescopic boom 700 via a luffing cylinder, connecting rod assembly, and pin; the ladder arm 100 is connected to the articulated boom 300 via an articulated boom rotation cylinder and pin; the articulated boom 300 is connected to the counterweight boom 820 via a pin; and the counterweight boom 820 is hinged to the work bucket 800.

[0085] When using aerial ladders for rescue, depending on the angle between the work bucket 800 and the articulated boom 300, when the other side of the articulated boom ladder is driven by the drive unit 411 to extend the drive ladder 430 towards the work bucket 800 to a suitable length, the flap 830 can be flipped 90° and placed on the drive ladder 430, achieving a seamless connection between the articulated boom ladder and the work bucket 800 and improving safety.

[0086] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0087] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A boom structure for aerial work platforms, characterized in that, include: A ladder arm and a ladder assembly, wherein the ladder assembly includes a ladder body and an auxiliary ladder slidably disposed on the ladder body; The articulated boom member and the articulated boom ladder assembly, wherein the articulated boom ladder assembly includes an articulated boom ladder body and a movable ladder slidably disposed on the articulated boom ladder body, one end of the articulated boom member is hinged to the ladder arm, and the other end of the articulated boom member is used to connect to the working bucket of the climbing equipment; The movable ladder is configured such that, when the curved arm component rotates, it is driven by the curved arm ladder body to extend or retract relative to the curved arm ladder body, so as to switch between a folded position and an unfolded position. In the folded position, the curved arm ladder body is located below the cloud ladder body. In the unfolded position, the curved arm ladder body, the movable ladder, the auxiliary ladder, and the cloud ladder body are arranged sequentially along the sliding direction of the auxiliary ladder.

2. The boom structure of the aerial work platform according to claim 1, characterized in that, The articulated ladder assembly also includes: A drive ladder is slidably mounted on the articulated ladder body. The drive ladder is configured to extend or retract relative to the articulated ladder body under external force. The extended drive ladder is used to connect with the work bucket.

3. The boom structure of the aerial work platform according to claim 2, characterized in that, The articulated ladder body is provided with a driving component, and the driving ladder is provided with a connecting beam on the side opposite to the articulated ladder body. The driving end of the driving component is connected to the connecting beam. The driving component is configured to drive the driving ladder to extend or retract relative to the articulated ladder body.

4. The boom structure of the aerial work platform according to claim 1, characterized in that, At least one of the ladder body and the articulated ladder body is provided with a first mating component, and at least one of the auxiliary ladder and the movable ladder is provided with a second mating component. The first mating component and the second mating component are slidably connected so that the ladder body and the auxiliary ladder are slidably connected, or the articulated ladder body and the movable ladder are slidably connected.

5. The boom structure of the aerial work platform according to claim 4, characterized in that, The first mating component is a slide rail, and the second mating component is a slider that engages with the first mating component; or, the first mating component is a slider, and the second mating component is a slide rail for engaging with the first mating component.

6. The boom structure of the aerial work platform according to claim 1, characterized in that, The auxiliary ladder has a first ear plate at one end facing the movable ladder, and the movable ladder has a second ear plate at one end facing the auxiliary ladder. The first ear plate and the second ear plate are connected by a common pivot, so that the auxiliary ladder and the movable ladder are hinged.

7. The boom structure of the aerial work platform according to any one of claims 1 to 6, characterized in that, It also includes a curved arm support component, which includes a main rod, a connecting rod, and at least two support rods. One end of the main rod is connected to the curved arm component, and the other end of the main rod is connected to at least two of the support rods through the connecting rod. At least two of the support rods are connected to the curved arm ladder body.

8. The boom structure of the aerial work platform according to any one of claims 1 to 6, characterized in that, The crank arm component includes: Curved arm body; A first reinforcing plate is connected to the articulated boom body, and the articulated boom body is hinged to the ladder arm through the first reinforcing plate. The second reinforcing plate is connected to the articulated boom body, and the articulated boom body is hinged to the working bucket through the second reinforcing plate.

9. A climbing device, characterized in that, It includes a work bucket and a boom structure of the aerial work platform as described in any one of claims 1 to 8 connected to the work bucket.

10. The climbing equipment according to claim 9, characterized in that, It also includes a turntable, on which a rotatable telescopic main boom is provided, the telescopic main boom is connected to a main boom ladder, and the telescopic main boom is connected to the ladder arm of the boom structure. The work bucket is connected to the articulated boom component of the boom structure via a counterweight arm. The work bucket is provided with an inlet / outlet opening for connecting the articulated boom ladder assembly. A rotatable flap is connected to the lower end of the inlet / outlet opening, and the flap is used to overlap with the articulated boom ladder assembly.

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