A hanging basket main truss node pin shaft connecting structure

Abstract

The utility model discloses a main truss node pin shaft connecting structure for rhombic hanging basket, this structure includes two node boards of opposite setting, the high strength main pin axle of through node board, the guiding centring sleeve of fixed in node board pin axle hole outside, the modular wear -resisting bushing of embedding in node board pin axle hole, set up in the bidirectional anti -loose device of main pin axle end portion, and the transverse stable connecting rod of being connected between two node boards. The utility model solves the difficult problem of installing the hole through the guiding centring sleeve, improves the node life and maintainability through the replaceable wear -resisting bushing, prevents the pin axle axial movement through the bidirectional anti -loose device, strengthens the node overall rigidity through the transverse stable structure. The utility model has improved the safety, durability and construction efficiency of connecting node significantly, and the manufacturing cost is controllable, has certain engineering application value.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to an improved structure for node pin connection suitable for a rhomboid hanging basket main truss system. Background Technology

[0002] In the construction of continuous beam bridges, the diamond-shaped hanging basket is the core construction equipment. Its main truss system, as the main load-bearing component of the hanging basket, directly bears the weight of the concrete of the beam segment, the construction load, and the self-weight of the hanging basket. The reliability of the connection of the main truss nodes determines the overall construction safety of the hanging basket. In existing technologies, the main truss nodes of the hanging basket are connected by box bodies and pins. While this method offers convenience for assembly and disassembly, it suffers from the following technical drawbacks: First, the pin holes in the node boxes lack a guiding structure, requiring repeated alignment during installation, which can lead to low construction efficiency and potential installation stress due to hole misalignment. Second, fixation relies solely on the fit between the pin and the hole, making it susceptible to axial movement or increased radial clearance due to long-term construction vibrations and alternating loads, posing safety hazards. Third, the direct contact between the pin and the box hole leads to wear on the hole wall due to frequent disassembly, assembly, and friction, shortening the node's lifespan and necessitating frequent replacement of the box body or pin. Fourth, the node boxes of two main trusses are connected only by pins, resulting in weak lateral deformation resistance, especially during hanging basket movement or concrete pouring, which can cause lateral displacement of the node and affect construction accuracy. Therefore, those skilled in the art urgently need a new node pin connection structure that can fundamentally overcome the above-mentioned defects and improve the safety, reliability, and economy of hanging basket operations. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pin connection structure for the main truss node of the hanging basket. This structure should be able to achieve fast and accurate pin installation, have reliable anti-loosening performance, have excellent wear resistance and easy maintenance, and can significantly enhance the lateral stiffness of the node, thereby comprehensively improving the overall performance of the hanging basket.

[0004] To achieve the above technical objectives, the following technical solution is adopted: A hanging basket main truss node pin connection structure includes two node plates arranged opposite each other, a high-strength main pin penetrating the node plates, a guide centering sleeve fixed to the outside of the pin hole of the node plate, a modular wear-resistant bushing embedded in the pin hole of the node plate, a bidirectional anti-loosening device set at the end of the main pin, and a transverse stabilizing link connecting the two node plates.

[0005] Furthermore, the guide centering sleeve is fixed to the node plate by welding or threading, and its inner hole is provided with a guide cone opening. The diameter of the guide cone opening gradually decreases from the outside to the inside until it matches the inner diameter of the modular wear-resistant bushing.

[0006] Furthermore, the modular wear-resistant bushing is made of surface-hardened high-carbon steel or copper-based alloy, with its outer wall having an interference fit with the pin hole of the node plate and its inner wall having a clearance fit with the main pin.

[0007] Furthermore, the end face of the modular wear-resistant bushing is provided with multiple disassembly threaded holes evenly distributed along the circumferential direction.

[0008] Furthermore, the bidirectional anti-loosening device includes a slotted nut screwed onto the threaded end of the main pin shaft and a cotter pin passing through the slotted nut and a pin hole provided on the main pin shaft.

[0009] Furthermore, each of the two node plates is pre-set with a connecting lug plate, and the transverse stabilizing link is a rod-shaped member with threads at both ends, with its two ends passing through the connecting lug plates on the two node plates respectively, and being fixed by locking nuts, so that the two node plates remain parallel and at a predetermined distance.

[0010] Furthermore, an annular reinforcing rib is welded around the pin hole of the node plate.

[0011] Furthermore, the thickness of the annular reinforcing rib is not less than 0.8 times the thickness of the node plate.

[0012] This utility model provides a pin connection structure for the main truss node of a hanging basket, which has the following significant advantages compared with the prior art: 1. Significantly improved ease of installation: The tapered design of the guide centering sleeve enables "foolproof" installation, significantly reducing the technical requirements and labor intensity for operators, shortening operation time, and improving construction efficiency.

[0013] 2. Significantly enhanced connection safety and reliability: The two-way anti-loosening device (slotted nut + cotter pin) provides reliable mechanical anti-loosening protection, eliminates the possibility of axial movement of the pin, and adapts to the harsh vibration conditions of the hanging basket.

[0014] 3. Extended node lifespan and reduced maintenance costs: The modular wear-resistant bushing design concentrates wear on replaceable, inexpensive bushings, protecting the expensive node structure. Maintenance only requires replacing the bushings, saving time and effort and significantly reducing total life-cycle costs.

[0015] 4. Significantly improved structural stiffness and stability: The addition of lateral stabilizing links effectively improves the lateral stiffness and torsional performance of the nodes, ensuring the positional accuracy of the hanging basket during construction and contributing to the quality of the completed bridge.

[0016] 5. Modular design with strong versatility: Each improved module is relatively independent, with a simple structure and mature manufacturing process. It can be widely used in the upgrading and transformation of new and old hanging baskets, and has high promotion value and economic benefits. Attached Figure Description

[0017] The present invention will now be described in conjunction with the accompanying drawings.

[0018] Figure 1 This is a side view of the overall structure of this utility model.

[0019] Figure 2 This is a front view of the overall structure of this utility model.

[0020] Figure 3 This is an end view of the modular wear-resistant bushing in this utility model.

[0021] In the diagram: 1-Node plate; 11-Connecting ear plate; 12-Annular reinforcing rib; 2-Main pin; 3-Guide centering sleeve; 31-Guide cone; 4-Modular wear-resistant bushing; 41-Disassembly threaded hole; 5-Two-way anti-loosening device; 51-Slotted nut; 52-Cotter pin; 6-Transverse stabilizing link; 61-Locking nut. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. The described embodiments are merely some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figures 1 to 3 As shown, this utility model provides a pin connection structure for the main truss node of a hanging basket.

[0024] First, component prefabrication is carried out. The node plate 1 is cut from steel plate with a thickness of 40mm. A 30mm thick annular reinforcing rib 12 is welded around its pin hole. On the outside of the node plate 1, a guide centering sleeve 3 is welded. The guide cone 31 of this sleeve has a large end diameter of 130mm and a small end diameter of 112mm, with a taper of 1:8. The modular wear-resistant bushing 4 is pressed into the pin hole of the node plate 1. The bushing is made of surface-hardened high-carbon steel or copper-based alloy. Its outer wall has an interference fit with the pin hole of the node plate 1, while its inner wall has a clearance fit with the main pin 2. Four M10 disassembly threaded holes 41 are evenly distributed circumferentially on the end face of the modular wear-resistant bushing 4.

[0025] Next, on-site assembly is carried out. The two node plates 1 are positioned using temporary supports, ensuring their pin holes are concentric. The lateral stabilizing link 6, made of 36mm diameter precision-rolled threaded steel bars, is installed, with corresponding locking nuts 61 at both ends, and initially pre-tightened. The ear plates of the main truss members are inserted between the two node plates 1. Holding the high-strength main pin 2, its end is aligned with the guide cone 31 on one side and gently pushed in. The main pin 2, guided by the cone surface, smoothly passes through the modular wear-resistant bushing 4 and the ear plate of the main truss member, exiting from the other side.

[0026] Finally, tighten and prevent loosening. Screw a slotted nut 51 into the threads at both ends of the main pin 2, using a torque wrench to tighten to the specified preload. Then, pass the cotter pin 52 through the slot of the slotted nut 51 and the pin hole at the end of the main pin 2, and pry open the tail of the cotter pin 52 to complete the locking. Finally, tighten the locking nuts 61 at both ends of the lateral stabilizer link 6 again, making the entire node a rigid whole.

[0027] When maintenance is required, simply remove the cotter pin 52 and unscrew the slotted nut 51 to pull out the main pin shaft 2. If the modular wear-resistant bushing 4 is found to be worn beyond the limit, the bolt can be screwed into the disassembly threaded hole 41, and the old bushing can be pushed out by the force of the bolt. Then, the new bushing can be pressed in. No treatment of the node plate 1 is required.

[0028] Other aspects of this utility model that are not detailed herein are all conventional techniques known to those skilled in the art.

[0029] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A main truss node pin connection structure for a hanging basket, comprising two node plates (1) arranged opposite to each other and a high-strength main pin (2) penetrating the node plates (1); characterized in that: It also includes a guide centering sleeve (3) fixed to the outside of the pin hole of the node plate (1), a modular wear-resistant bushing (4) embedded in the pin hole of the node plate (1), a bidirectional anti-loosening device (5) set at the end of the main pin (2), and a transverse stabilizing link (6) connecting the two node plates (1).

2. The hanging basket main truss node pin connection structure according to claim 1, characterized in that: The guide centering sleeve (3) is fixed to the node plate (1) by welding or threading. Its inner hole is provided with a guide cone (31). The diameter of the guide cone (31) gradually decreases from the outside to the inside until it is consistent with the inner diameter of the modular wear-resistant bushing (4).

3. The hanging basket main truss node pin connection structure according to claim 1, characterized in that: The modular wear-resistant bushing (4) is made of high carbon steel or copper-based alloy with surface hardening treatment. Its outer wall is interference fit with the pin hole of the node plate (1), and its inner wall is clearance fit with the main pin (2).

4. The hanging basket main truss node pin connection structure according to claim 3, characterized in that: The modular wear-resistant bushing (4) has multiple disassembly threaded holes (41) evenly distributed along the circumferential direction on its end face.

5. The hanging basket main truss node pin connection structure according to claim 1, characterized in that: The bidirectional anti-loosening device (5) includes a slotted nut (51) screwed onto the threaded end of the main pin (2) and a cotter pin (52) passing through the slotted nut (51) and a pin hole on the main pin (2).

6. The hanging basket main truss node pin connection structure according to claim 1, characterized in that: The two node plates (1) are respectively equipped with connecting ear plates (11). The transverse stabilizing link (6) is a rod-shaped component with threads at both ends. Its two ends pass through the connecting ear plates (11) on the two node plates (1) respectively and are fixed by locking nuts (61) so that the two node plates (1) remain parallel and at a predetermined distance.

7. The hanging basket main truss node pin connection structure according to claim 1, characterized in that: The node plate (1) is surrounded by annular reinforcing ribs (12) welded around the pin hole.

8. The hanging basket main truss node pin connection structure according to claim 7, characterized in that: The thickness of the annular reinforcing rib (12) is not less than 0.8 times the thickness of the node plate.

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