Movable basket structure and tower crane

Abstract

The utility model discloses a movable basket structure and tower crane, include: the maintenance platform is set up in tower crane, and the front end middle of maintenance platform is provided with the gap, movable basket, embeds and installs in the gap, and the both sides of movable basket are equipped with upper and lower connecting pin hole, and the maintenance platform is equipped with the platform connecting hole who matches with connecting pin hole, and movable basket is connected with maintenance platform through the pin shaft, to realize the switching of movable basket between the high -position storage state and low -position maintenance state. The utility model discloses an integral installation of movable basket structure and tower crane, need not to build temporarily the maintenance platform extra, both simplify the maintenance process of crane, improve maintenance efficiency, and through the stable structure and safety protection design of basket, reduce the operation risk of maintenance personnel, further improve the overall use performance and safety guarantee system of tower crane.

Description

Technical Field

[0001] This utility model relates to a movable suspended platform structure and a tower crane, belonging to the field of tower cranes. Background Technology

[0002] The core load-bearing structures of tower cranes, such as the boom and counterweight boom, are usually equipped with various components (such as sensors and controllers) for equipment operation monitoring and safety control. These components need to be regularly debugged, calibrated, and maintained to ensure the operational safety and stability of the tower crane.

[0003] Currently, tower cranes are generally equipped with fixed maintenance platforms to provide personnel with maintenance and operation space. However, these fixed platforms are limited by the lifting operation conditions of tower cranes (such as the space constraints of boom pitching and slewing operations), and cannot cover the maintenance positions of all components, especially for luffing jib tower cranes. Figure 1 As shown, the boom head of the crane boom 1 is often equipped with key electrical components 3 such as tension sensors to realize the lifting luffing function. However, the fixed maintenance platform 2 adapted to the boom head is about 1 meter away from the aforementioned electrical components 3 in the height direction. This distance is beyond the normal operating range of personnel, which directly prevents maintenance personnel from getting close to the electrical components 3, and thus makes it impossible to effectively carry out maintenance and repair work, forming a key blind spot in equipment operation and maintenance. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides a movable suspended platform structure and a tower crane.

[0005] To achieve the above objectives, this utility model employs a movable suspended platform structure, comprising:

[0006] The maintenance platform is mounted on a tower crane, and a notch is provided in the middle of the front end of the maintenance platform;

[0007] A movable suspended platform is embedded in the notch. The movable suspended platform has upper and lower connecting pin holes on both sides. The maintenance platform has a platform connecting hole that matches the connecting pin holes. The movable suspended platform and the maintenance platform are connected by a pin shaft to realize the switching of the movable suspended platform between a high-position storage state and a low-position maintenance state.

[0008] In some embodiments, the movable suspended platform adopts a frame structure, which is formed by welding together multiple vertical pipes, longitudinal pipes and horizontal pipes; wherein, the vertical pipes are arranged in the vertical direction and serve as the vertical support body of the frame; the longitudinal pipes are arranged in the horizontal longitudinal direction and connect to adjacent vertical pipes; the horizontal pipes are distributed in the horizontal transverse direction and are connected to the vertical pipes at both ends respectively.

[0009] In some embodiments, flange plates are fixedly connected to the upper ends of both sides of the frame structure. The flange plates extend outward in the horizontal direction, and their extension length covers the side gap between the movable basket and the maintenance platform. When the movable basket is lowered to the low-position maintenance state, the lower surface of the flange plate fits against and supports the upper surface of the maintenance platform.

[0010] In some embodiments, the width of the flange is B. After the movable basket is embedded into the gap of the maintenance platform, a gap S1 is formed between its left side and the sidewall of the gap, and a gap S2 is formed between its right side and the sidewall of the gap, and B > S1 + S2.

[0011] In some embodiments, each of the flanges is provided with an upper connecting pin hole corresponding to the platform connecting hole.

[0012] In some embodiments, a side plate is fixedly provided on the bottom periphery of the frame structure, and the side plate is arranged to enclose the vertical edge of the bottom of the frame structure to form a lateral protective structure for maintenance personnel to stand on; a base plate is fixedly installed on the inner side of the bottom of the frame structure within the enclosed area of ​​the side plate, and the edge of the base plate is tightly connected to the inner sidewall of the side plate to jointly form a bearing surface for maintenance personnel to stand on.

[0013] In some embodiments, an arc-shaped plate is fixedly installed between the upper edge of the side plate and the side wall of the corresponding side riser. The arc-shaped plate is provided with a lower connecting pin hole that matches the platform connecting hole, so that when the movable basket is in a high-level storage state, the pin shaft can be inserted to realize the detachable fixing of the movable basket and the maintenance platform.

[0014] In some embodiments, when the movable basket is in a high-position storage state and the pin is inserted into the lower connecting pin hole and the platform connection hole of the maintenance platform, the maximum distance P1 from the center of the lower connecting pin hole to the notch of the maintenance platform is less than the maximum distance P2 from the center of the lower connecting pin hole to the bottom edge of the movable basket, which is used to prevent the movable basket from falling out of the maintenance platform in any posture.

[0015] In some embodiments, the base plate is provided with perforated holes, and a permeable mesh is fixedly embedded or detachably installed in the perforated holes.

[0016] In a second aspect, this utility model also provides a tower crane on which the aforementioned movable scaffold structure is installed.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] (1) Compact structure and reusable function. The suspended platform adopts a frame structure. Its horizontally distributed horizontal pipes not only serve to connect the vertical pipes and enhance the stability of the frame, but also function as ladders for maintenance personnel to climb up and down. There is no need to configure an additional independent ladder, which effectively simplifies the overall structure and saves space.

[0019] (2) Excellent protection during transportation and storage. During the ground assembly stage, the suspended platform can be fixed to the maintenance platform in a high-level storage state by means of pins, so that the suspended platform and the platform form an integrated structure; there is no need to separate the two during transportation and storage, which avoids the bumps and damage when the suspended platform is transported separately, and reduces the cost of disassembly and assembly.

[0020] (3) High ease of operation. The suspended platform adopts a lightweight design and the retraction and extension can be completed simply by inserting and removing the pin. No lifting equipment or complicated tools are required. A single person can independently switch the suspended platform from high-level storage to low-level maintenance, which greatly improves the efficiency of operation.

[0021] (4) Easy and efficient installation and fixing: The fixing of the suspended platform and the maintenance platform only requires two pins (the lower connecting pin hole is used when storing in a high position, and the upper connecting pin hole is used when maintaining in a low position). There is no need for complicated connectors or multi-step assembly, which significantly reduces the difficulty of installation and shortens the assembly time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the boom structure of an existing tower crane;

[0024] Figure 2 This is a schematic diagram of the boom structure of the tower crane of this utility model (schematic diagram of the unused basket);

[0025] Figure 3 This is a schematic diagram of the structure of the movable suspended platform of this utility model;

[0026] Figure 4 This is a schematic diagram of the movable suspended platform of this utility model in a low-position maintenance state.

[0027] Figure 5 This is a schematic diagram showing the connection between the upper end of the movable suspended platform and the maintenance platform of this utility model;

[0028] Figure 6 This is a sectional view showing the connection between the upper end of the movable suspended platform and the maintenance platform of this utility model.

[0029] Figure 7 This is a schematic diagram of the lower connecting pin hole of this utility model;

[0030] In the diagram: 1. Crane boom, 2. Maintenance platform, 21. Side mounting plate, 3. Electrical components, 4. Movable suspended platform, 41. Riser, 42. Longitudinal pipe, 43. Horizontal pipe, 44. Side plate, 45. Base plate, 46. Permeable mesh, 47. Lower connecting pin hole, 48. Flange plate, 49. Upper connecting pin hole, 5. Pin shaft. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this application will be described in detail below through specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0033] like Figures 2-6 As shown, a movable suspended platform structure includes a maintenance platform 2 and a movable suspended platform 4 installed on the maintenance platform 2;

[0034] The maintenance platform 2 is mounted on a tower crane. By opening a notch in the middle of the front end of the maintenance platform 2, a precise embedded installation position can be provided for the movable scaffold 4, preventing the scaffold from shifting or swaying. At the same time, the scaffold can fit the platform structure without occupying additional crane working space. Meanwhile, side mounting plates 21 are provided on the platforms on both sides of the notch. The side mounting plates 21 are provided with platform connection holes. The side mounting plates 21 can enhance the load-bearing strength of the platform connection holes through local structural reinforcement, avoiding local stress concentration caused by the connection holes being directly opened on the platform body.

[0035] The movable suspended platform 4 is embedded in the notch. The upper and lower connecting pin holes on both sides of the platform correspond to the platform connecting holes on the maintenance platform 2. The two are then connected by a pin 5. On the one hand, by switching the pin holes (upper connecting pin hole and lower connecting pin hole) through which the movable suspended platform 4 passes, the platform can be flexibly switched between a high-position storage state and a low-position maintenance state, meeting the dual requirements of not affecting hoisting when not in maintenance and being able to access components during maintenance. On the other hand, the detachable connection of the pin 5 allows the platform to be installed and disassembled without complicated tools, reducing the difficulty of operation, while ensuring structural stability during the switching process and preventing the platform from falling off during maintenance.

[0036] In some embodiments, such as Figure 3 As shown, the movable suspended platform 4 adopts a frame structure, which is formed by welding together multiple vertical pipes 41, longitudinal pipes 42 and horizontal pipes 43. Welding can significantly improve the connection strength between the pipes, effectively prevent the components from loosening when the suspended platform carries maintenance personnel or tools, and effectively ensure the structural safety during use.

[0037] The vertical pipe 41 is arranged vertically and serves as the main vertical support of the frame. It can directly bear the weight of the suspended platform itself and the external load during maintenance, providing stable vertical support for the overall structure and preventing the frame from deforming due to uneven stress. The longitudinal pipe 42 is arranged horizontally and connects to adjacent vertical pipes 41, which can connect the dispersed vertical pipes 41 into a complete force system, reduce the local stress concentration of a single vertical pipe 41, further improve the lateral stability of the frame, and prevent the suspended platform from tilting laterally during use. The horizontal pipe 43 is distributed horizontally and connected to the vertical pipes 41 at both ends. It can further strengthen the overall structure of the frame through lateral bracing and also serve as an auxiliary support structure for maintenance personnel to climb up and down, eliminating the need for an additional independent ladder. This simplifies the overall structure and improves the ease of operation.

[0038] In some embodiments, such as Figure 3 , Figure 5 As shown, flange plates 48 are fixedly installed on the upper ends of both sides of the frame structure. The flange plates 48 extend outward in the horizontal direction, and the extension length just covers the side gap between the movable basket 4 and the maintenance platform 2. This can avoid lateral leakage caused by the gap, prevent maintenance tools from falling from the gap, and reduce lateral safety hazards when personnel are operating.

[0039] When the movable suspended platform 4 is lowered to the low-level maintenance position, the lower surface of the flange plate 48 can fit tightly against the upper surface of the maintenance platform 2. The weight of the suspended platform and maintenance personnel is distributed by the load-bearing capacity of the maintenance platform 2, avoiding the suspended platform from relying solely on the pin 5 for force. This not only improves the load-bearing stability of the overall structure but also extends the service life of the pin 5, further ensuring structural safety during the maintenance process.

[0040] In some embodiments, such as Figure 6 As shown, the width of the flange plate 48 is set to B. When the movable basket 4 is inserted into the notch of the maintenance platform 2, a gap S1 is naturally formed between its left side and the side wall of the notch, and a gap S2 is formed between its right side and the side wall of the notch. The design ensures that B > S1 + S2. This dimensional relationship allows the flange plate 48 to completely cover the left and right gaps between the movable basket 4 and the side wall of the notch after extending horizontally. This provides good support and prevents personnel from accidentally putting their feet into the gaps during operation, thus avoiding safety hazards. At the same time, the full coverage of the gaps by the flange plate 48 can also reduce the seepage of rainwater and dust into the platform, indirectly improving the durability of the connection between the maintenance platform 2 and the movable basket 4.

[0041] In some embodiments, each of the flange plates 48 is provided with an upper connecting pin hole 49 corresponding to the platform connecting hole, and the hole diameter and center height of the upper connecting pin hole 49 are precisely corresponding to the platform connecting hole on the mounting plate 21 on the side of the maintenance platform 2.

[0042] When the movable suspended platform 4 is lowered to the low-position maintenance state, the pin 5 can be sequentially passed through the upper connecting pin hole 49 of the flange plate 48 and the platform connecting hole of the side mounting plate 21 to stably fix the suspended platform in the maintenance position. This not only prevents the suspended platform from shifting due to external forces (such as slight shaking of the crane) during the maintenance process, ensuring the safety of personnel operation, but also simplifies the pin passing operation through the precise correspondence of the pin holes and improves the efficiency of state switching.

[0043] In some embodiments, such as Figure 3 As shown, a side plate 44 is fixedly installed on the bottom periphery of the frame structure. The side plate 44 is arranged around the vertical edge of the bottom of the frame structure to form a surrounding lateral protection structure. It can not only prevent maintenance tools and parts from falling from the side of the bottom of the basket, but also provide lateral restraint when personnel are standing and operating, so as to avoid personnel loss of balance due to accidental collisions and further enhance safety protection during maintenance.

[0044] On the inner side of the bottom of the frame structure, a base plate 45 is fixedly installed within the enclosure of the side plate 44. The edge of the base plate 45 is tightly connected to the inner wall of the side plate 44, and the two together form a complete load-bearing surface. This not only evenly distributes the weight of maintenance personnel and tools, avoiding excessive local stress that could lead to structural deformation, but also reduces the gap between the base plate and the side plate through tight connection, preventing the accumulation of dust and impurities and reducing the cost of later cleaning and maintenance.

[0045] In some embodiments, such as Figure 3As shown, an arc-shaped plate is fixedly installed between the upper edge of the side plate 44 and the side wall of the corresponding side riser 41. The arc-shaped plate can avoid sharp edges at the connection between the side plate 44 and the riser 41 through a smooth transition structure, which reduces the risk of bumps and knocks during operation and disperses the stress at the connection point of the two components, thereby improving the overall strength of the frame structure.

[0046] Meanwhile, the arc-shaped plate is provided with a lower connecting pin hole 47 that matches the platform connection hole on the side mounting plate 21 of the maintenance platform 2. When the movable basket 4 needs to be switched to the high-level storage state, the pin 5 can pass through the lower connecting pin hole 47 of the arc-shaped plate and the platform connection hole of the side mounting plate 21 in sequence to fix the basket stably in the notch of the maintenance platform 2. This not only avoids the basket from shaking and affecting the crane operation in the non-maintenance state, but also reserves convenient operating space for subsequent switching to the low-level maintenance state through the detachable pin connection method, taking into account both safety and practicality.

[0047] In some embodiments, such as Figure 7 As shown, when the movable suspended platform 4 is in a high-level storage state, and the pin 5 passes through the lower connecting pin hole 47 and the platform connection hole of the maintenance platform 2, the maximum distance from the center of the lower connecting pin hole 47 to the notch of the maintenance platform 2 is set as P1, and the maximum distance from the center of the lower connecting pin hole 47 to the bottom edge of the movable suspended platform 4 is set as P2. The design ensures that P1 < P2. This dimensional relationship can, through the principle of torque balance, ensure that the center of gravity of the movable suspended platform 4 falls on the force-bearing side of the pin 5 (the side closer to the maintenance platform 2), avoiding the suspension platform from tipping over around the pin 5 due to its own weight or slight external forces (such as wind or crane vibration). This further enhances the structural stability in the high-level storage state and ensures that the crane operation during non-maintenance periods is not affected by the safety hazards of the suspended platform.

[0048] In some embodiments, such as Figure 3 As shown, the base plate 45 has perforated holes, and a permeable mesh 46 is installed in these holes using a fixed or detachable method. The perforated holes allow rainwater and accumulated water on the base plate 45 to drain quickly, preventing long-term water accumulation that could cause corrosion of the base plate 45 or slippage when standing on it, while also reducing the corrosion and damage to the overall structure of the suspended platform caused by accumulated water. The permeable mesh 46 effectively prevents maintenance tools and parts from falling through the perforated holes without affecting drainage, thus combining drainage function with safety protection. In addition, the detachable installation method facilitates the cleaning or replacement of the permeable mesh 46 in the future, reducing maintenance costs and extending the service life of the components.

[0049] The simplified steps for the above-mentioned movable suspended platform structure are as follows:

[0050] (1) Initial high-level storage (when not under maintenance)

[0051] The movable suspended platform 4 is precisely aligned and fixed to the platform connection hole 2 of the maintenance platform 2 by passing through the lower connecting pin hole 47 on the arc plate via the pin shaft 5, and is embedded into the platform notch as a whole (e.g. Figure 2 (As shown). In this state, the suspended platform does not occupy the crane's working space, and the torque balance design effectively avoids the risk of tipping over.

[0052] (2) Switch to low-level inspection (when maintenance is required)

[0053] The operator stands on the maintenance platform 2 and first pulls out the pin 5 that passes through the lower connecting pin hole 47; slowly lowers the movable basket 4 until the lower surface of the flange plate 48 is completely in contact with the upper surface of the maintenance platform 2; then fixes the pin 5 through the upper connecting pin hole 49 of the flange plate 48 to the platform connection hole; finally, safely climbs to the base plate 45 through the horizontal pipe 43 to carry out maintenance work.

[0054] (3) Reset the high position after maintenance

[0055] The operator first climbs steadily onto the maintenance platform 2 via the horizontal tube 43. After confirming that their standing position is stable, they pull out the pin 5 that passes through the upper connecting pin hole 49 of the flange plate 48. Then, they support the frame of the movable basket 4 with both hands and lift the basket steadily upwards until the lower connecting pin hole 47 on the curved plate is precisely aligned with the platform connection hole of the maintenance platform 2. Finally, they fully insert the pin 5 through the lower connecting pin hole 47 and the platform connection hole, check and confirm that it is firmly fixed, and then the movable basket 4 returns to its high-position storage state.

[0056] Finally, this utility model also provides a tower crane, such as a luffing jib tower crane, which is equipped with the above-mentioned movable basket structure at the corresponding positions of components that require daily maintenance (such as electrical components 3).

[0057] By integrating the movable scaffold structure with the tower crane, there is no need to build an additional temporary maintenance platform. This allows the scaffold to be stored at a high position without affecting lifting operations when not under maintenance, and to be quickly lowered to a low position for operation during maintenance. This simplifies the crane's maintenance process, improves maintenance efficiency, and reduces the operational risks for maintenance personnel through the stable structure and safety protection design of the scaffold, further improving the overall performance and safety assurance system of the tower crane.

[0058] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this utility model and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

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