A pin pulling device suitable for quick assembly and disassembly of tower crane standard section
Patent Information
- Application Number
- CN202522495380.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-25
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-25
AI Technical Summary
[0003]市场上现有的拔销器，大多构造简单，拉拔力较小，甚至就是一根简易液压油缸，操作繁琐，没有稳定的连接结构，推拔数次即出现结构性损坏现象，根本无法适应如标准节连接销一类的大型销轴频繁装拆的操作
[0010]本实用新型的技术效果和优点：通过安装在塔式起重机外爬套架上的快速拔销装置，只需要极少的人工投入，即可实现标准节连接销高效、便捷地推入和拔出操作。通过优化标准节连接销的装拆流程，显著提升了超高塔身塔式起重机装拆效率，大幅缩短了起重设备的装拆工期，有效降低了工程设备成本。操作人员只需在标准节内部进行有限的操作，即可实现标准节连接销的快速装拆，大大提高了工程设备装拆施工的安全性，降低了工程施工过程中显性和隐形的风险。
Smart Images
Figure CN224867234U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of tower cranes, specifically relating to a pin-pulling device suitable for the rapid assembly and disassembly of standard tower crane sections. Background Technology
[0002] Tower cranes using standard sections with pin connections as their tower body require frequent pushing and pulling of the connecting pins during assembly and disassembly (each standard section requires four extra-large, high-strength connecting pins with a diameter of 180mm, and each tower crane requires approximately 28 standard sections). In previous cases, this often relied on manual labor using a sledgehammer to repeatedly strike the ends of the connecting pins to move and position them within the pin holes of the standard section. This operation is inefficient and extremely labor-intensive. If corrosion or jamming occurs, the assembly and disassembly of a single standard section can take several hours, severely impacting the construction progress. During the sledgehammer strikes, the striking angle and force need frequent adjustments, making standardized operation impossible, and striking efficiency decreases significantly as the operator's physical strength declines. Furthermore, due to the high-altitude nature of the work, the operator is prone to loss of balance and falls while wielding the sledgehammer, posing a significant safety risk. Furthermore, the possibility of the hammer detaching or slipping could lead to falls or being struck by falling objects. The instantaneous impact of a sledgehammer striking the connecting pin can deform the pin end, damage the clamping plate threads, and even crack the connecting hole of the standard section, creating a structural safety hazard. Rust or metal shavings on the connecting pin surface can also fly out due to the impact, potentially injuring the operator's eyes or skin.
[0003] Most of the pin pullers currently available on the market are simple in construction, have low pulling force, or are even just a simple hydraulic cylinder. They are cumbersome to operate, lack a stable connection structure, and will suffer structural damage after a few pushes and pulls. They are simply not suitable for the frequent assembly and disassembly of large pins such as standard section connecting pins. Utility Model Content
[0004] The purpose of this invention is to provide a pin-pulling device suitable for the rapid assembly and disassembly of standard sections of tower cranes, in order to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a pin-pulling device suitable for the rapid assembly and disassembly of standard tower crane sections, comprising a mounting base plate, a lower beam support, a cylinder beam, a cover, a pin-pulling cylinder, a pin-pulling connector, and an electric push rod. The lower beam support is mounted on the mounting base plate and has a self-lubricating guide seat. The cylinder beam is mounted in the self-lubricating guide seat of the lower beam support via its own guide rod. Electric push rods are provided on both sides of the lower beam support and the cylinder beam. The pin-pulling cylinder is mounted on the cylinder beam, and a pin-pulling connector is provided at one end of the pin-pulling cylinder.
[0006] Preferably, the guide rod end of the cylinder beam is provided with a circular cover.
[0007] Preferably, a speed regulating valve block is provided on the lower beam support.
[0008] Preferably, the lower beam support is vertically π-shaped and is bolted to the base plate.
[0009] Preferably, the pin-pulling cylinder is rotatably connected to the cylinder beam.
[0010] The technical effects and advantages of this utility model are as follows: By using a quick-release pin device installed on the outer climbing frame of a tower crane, the standard section connecting pins can be efficiently and conveniently pushed in and pulled out with minimal manual labor. By optimizing the assembly and disassembly process of the standard section connecting pins, the assembly and disassembly efficiency of ultra-high tower cranes is significantly improved, the assembly and disassembly period of lifting equipment is greatly shortened, and the cost of engineering equipment is effectively reduced. Operators only need to perform limited operations inside the standard section to achieve rapid assembly and disassembly of the standard section connecting pins, greatly improving the safety of engineering equipment assembly and disassembly construction and reducing both explicit and implicit risks during construction. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the installation structure of this utility model. Detailed Implementation
[0012] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0013] This utility model provides a pin-pulling device suitable for quick assembly and disassembly of standard sections of tower cranes, as shown in the figure. It mainly consists of a mounting base plate 1, a lower beam support 2, a cylinder beam 3, a cover 4, a pin-pulling cylinder 5, a pin-pulling connector 6, a speed regulating valve group 7, and an electric push rod 8. The lower beam support 2 is vertically π-shaped and is bolted to the base plate 1, which is welded to the outer climbing frame structure beam of the tower crane. Two sets of parallel self-lubricating guide seats are provided above the lower beam support 2. The cylinder beam 3 is installed in the self-lubricating guide seats of the lower beam support 2 via its own guide rod and can slide back and forth. A circular stop 4 is installed at the end of the guide rod of the cylinder beam 3 to limit the maximum stroke displacement of the guide rod and prevent it from slipping out of the guide seat. Two sets of electric push rods 8 are installed on both sides of the lower beam support 2 and the cylinder beam 3 to push and pull the cylinder beam 3, causing the pin-pulling cylinder to move horizontally to the alignment position of the standard section connecting pin axis. The pin-pulling cylinder 5 is connected to the cylinder beam 3 via a hinge and is equipped with a cotter pin to prevent the connecting pin from slipping. A cylindrical pin-pulling connector 6 is installed at the end of the piston rod of the pin-pulling cylinder 5 to hook the T-bolt at the end of the standard section connecting pin, thereby enabling the pin to be pulled out and pushed in. A speed regulating valve block 7 is installed above the guide seat of the lower beam bracket 2 to balance the extension of the piston rods of the two sets of pin-pulling cylinders 5 under the same conditions. The hydraulic power source is connected to the pin-pulling cylinder 5 and the speed regulating valve group 7 via hydraulic hoses to ensure that the hydraulic oil pipe joints are not damaged due to relative displacement when the cylinder beam 3 reciprocates within the guide seat.
[0014] Working principle of quick pin removal device like Figure 2 As shown, after the quick pin removal device is installed on the tower crane's outer climbing frame 11, the tower crane's outer climbing frame 11 and upper structure are adjusted so that the upper standard section 12 sits on the lower standard section. At this time, the female connector of the standard section 12 is combined with the male connector of the next standard section, and the pin holes on the male and female connectors are exactly opposite each other.
[0015] The operator simply stands on the platform 9 inside the standard section and presses the operation button to control the electric push rod 8 to move the cylinder beam 3 inwards towards the inside of the standard section until the piston rod aligns with the end of the standard section connecting pin. At this point, the pin-pulling connector 6 at the head of the pin-pulling cylinder piston rod is precisely engaged with the T-bolt at the end of the connecting pin 10. The operator then presses the pin-pulling or push-pull button to control the movement of the pin-pulling cylinder piston rod. The piston rod drives the standard section connecting pin to move slowly within the pin hole until the appropriate stroke displacement is reached. The operator continues to press the operation button to pull the cylinder beam 3 outwards from the standard section, while simultaneously retracting the piston rod of the pin-pulling cylinder 5. The quick pin-pulling device then returns to its initial state, completing the pin-pulling or push-pull operation of the standard section connecting pin.
[0016] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A pin-removing device suitable for the rapid assembly and disassembly of standard sections of tower cranes, characterized in that, The device includes a mounting base plate, a lower beam bracket, a cylinder beam, a cover, a pin-pulling cylinder, a pin-pulling connector, and an electric push rod. The lower beam bracket is mounted on the mounting base plate and has a self-lubricating guide seat. The cylinder beam is mounted in the self-lubricating guide seat of the lower beam bracket via its own guide rod. Electric push rods are provided on both sides of the lower beam bracket and the cylinder beam. The pin-pulling cylinder is mounted on the cylinder beam, and a pin-pulling connector is provided at one end of the pin-pulling cylinder.
2. The pin-pulling device for quick assembly and disassembly of standard sections of tower cranes according to claim 1, characterized in that: The guide rod of the cylinder beam is provided with a circular cover at its end.
3. A pin-removing device for quick assembly and disassembly of standard sections of tower cranes according to claim 1, characterized in that: A speed regulating valve block is installed on the lower beam support.
4. A pin-removing device for quick assembly and disassembly of standard sections of tower cranes according to claim 1, characterized in that: The lower beam support is vertically π-shaped and is bolted to the base plate.
5. A pin-pulling device for quick assembly and disassembly of standard sections of tower cranes according to claim 1, characterized in that: The pin-pulling cylinder is rotatably connected to the cylinder beam.