A new cast steel node interface

Abstract

The utility model belongs to steel node technical field especially provides a new -type cast steel node interface, including outer pole and connecting rod, the one end of outer pole is provided with the slot, the one end of connecting rod is provided with the butt joint pole, the outer wall of butt joint pole is connected in the inner wall of slot slidingly. The utility model discloses the butt joint pole of connecting rod's front end is aligned the slot of outer pole, makes the clamping rod of connecting rod four corners also synchronously slip into the connecting groove of outer pole four corners, and the edge of connecting piece and connecting groove contact, is pressed inwards, and through the spring of telescopic rod compression its outer wall, has stored the elastic potential energy, when clamping rod completely enters connecting groove and reaches the predetermined position, the spring of being compressed instantaneously releases energy, pushes telescopic rod, makes connecting piece rebound reset quickly, and the straight face clamping block on it firmly clamps into the card slot, strengthens the axial tensile resistance, more important is provided strong anti -twist and anti -shear ability.

Description

Technical Field

[0001] This utility model relates to the field of steel node technology, specifically a novel cast steel node interface. Background Technology

[0002] Cast steel joints are increasingly widely used as key load-bearing components in modern building structures, especially in large-span spatial steel structures, stadiums, convention centers, transportation hubs, and other large public buildings. They effectively connect multiple members converging at a single point, forming a stable and transparent structural system. The reliability, ease of construction, and economy of the connection method between cast steel joints and members directly affect the safety, progress, and cost of the entire structural project.

[0003] Currently, the mainstream connection methods for cast steel nodes and steel pipe members in engineering practice mainly fall into two categories: welding and high-strength bolt connections. Welding is a traditional and widely used connection method, with the advantages of good node integrity and direct and clear force transmission. However, its disadvantages are also quite prominent. First, the on-site welding workload is enormous, requiring strict control over the welder's skill level and the on-site environment (such as temperature and wind speed), making it difficult to guarantee quality. Second, the welding process generates significant residual stress and thermal deformation, which may adversely affect the load-bearing performance of the node. Third, the non-destructive testing process for weld quality (such as ultrasonic testing) is complex and costly, and once a welded node is formed, it is not detachable, posing significant difficulties for later maintenance, replacement, or structural modification. Compared to welding, high-strength bolt connections allow for factory prefabrication and on-site assembly, improving construction efficiency and offering detachability. However, it also presents inherent technical challenges. First, it requires extremely high manufacturing precision for the components; the bolt holes on the nodes and members must be precisely aligned, and any slight deviation may prevent the bolts from being inserted, causing difficulties in on-site installation. Secondly, to ensure the reliability of the connection, high-strength bolts must be preloaded with sufficient force, which requires the use of a professional torque wrench and strict adherence to complex construction techniques, making construction management difficult. Thirdly, under long-term dynamic loads or vibrations, the bolts are at risk of loosening, necessitating regular torque checks and maintenance, increasing later maintenance costs. Furthermore, the large number of exposed bolt heads and nuts detracts from the building's aesthetics to some extent. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a novel cast steel node interface. It solves the problem that current connection methods mainly fall into two categories: welding connections and high-strength bolt connections. Welded connections lack detachability, posing significant difficulties for later maintenance, replacement, or structural modifications. High-strength bolt connections require regular torque checks and maintenance, increasing long-term maintenance costs. Furthermore, the large number of exposed bolt heads and nuts negatively impacts the aesthetics of the building.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A novel cast steel node interface, comprising an external rod and a connecting rod. One end of the external rod has a slot, and one end of the connecting rod has a mating rod. The outer wall of the mating rod is slidably connected to the inner wall of the slot. Each of the four corners of one end of the connecting rod is fixedly connected to a locking rod. Each of the four corners of one end of the external rod has a connecting groove. One side of the outer wall of each locking rod has a groove. One side of the inner wall of each groove is fixedly connected to a support rod. The outer wall of the support rod is rotatably connected to a connecting piece. One side of the connecting piece is fixedly connected to a locking block. One side of the inner wall of each connecting groove has a locking slot. The outer wall of the locking block is engaged with the inner wall of the locking slot. A telescopic rod is hinged to the lower surface of each connecting piece. The bottom end of the telescopic rod is hinged to the inner surface of the groove. A spring is sleeved on the outer wall of the telescopic rod.

[0006] As a preferred technical solution of this utility model, one end of the connecting rod is fixedly connected to an elastic piece, one end of the elastic piece is fixedly connected to a hook piece, a sliding groove is provided on one side of the inner side of the outer rod, a hook groove is provided on one side of the sliding groove, the outer wall of the hook piece is slidably connected to the inner wall of the sliding groove, and one side of the hook piece is engaged with one side of the hook groove.

[0007] As a preferred embodiment of this utility model, four elastic sheets are provided, and the four elastic sheets are arranged at equal angles with the center of the connecting rod as the center.

[0008] In a preferred embodiment of this utility model, the elastic sheet is arc-shaped and the hook is trapezoidal.

[0009] As a preferred embodiment of this utility model, the maximum diameter of the four hook pieces when they are fully open is equal to the inner diameter of the groove, and the maximum diameter of the four hook pieces when they are fully open is equal to the inner diameter of the groove.

[0010] In a preferred embodiment of this utility model, the connecting piece is inclined and the locking block is straight.

[0011] As a preferred embodiment of this utility model, the inner wall of the chute is sloped.

[0012] Compared with the prior art, this utility model provides a novel cast steel node interface, which has the following beneficial effects:

[0013] This novel cast steel joint interface works by aligning the connecting rod at the front end of the connecting rod with the slot of the outer rod, and then pushing both in axially. Simultaneously, the locking rods at the four corners of the connecting rod slide into the connecting grooves at the four corners of the outer rod, causing the connecting piece to contact the edge of the connecting groove and be pressed inwards. The spring on its outer wall is compressed by the telescopic rod, storing elastic potential energy. When the locking rod fully enters the connecting groove and reaches the predetermined position, the compressed spring instantly releases energy, pushing the telescopic rod and causing the connecting piece to quickly spring back to its original position. The straight locking block on it then firmly engages in the slot, enhancing axial tensile strength and, more importantly, providing strong resistance to torsion and shear. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present utility model;

[0015] Figure 2 This is a schematic diagram of the present invention;

[0016] Figure 3 This is an exploded view of the structure of this utility model;

[0017] Figure 4 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 5 This is a structural diagram illustrating the present utility model.

[0019] In the diagram: 1. External rod; 2. Connecting rod; 3. Connecting rod; 4. Slot; 5. Locking rod; 6. Connecting groove; 7. Support rod; 8. Connecting piece; 9. Locking block; 10. Telescopic rod; 11. Spring; 12. Locking groove; 13. Elastic piece; 14. Hook piece; 15. Slide groove; 16. Hook groove; 17. Groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] Please see Figure 1-5In this embodiment: a novel cast steel node interface includes an external rod 1 and a connecting rod 2. One end of the external rod 1 is provided with a slot 4, and one end of the connecting rod 2 is provided with a docking rod 3. The outer wall of the docking rod 3 is slidably connected to the inner wall of the slot 4. Each of the four corners of one end of the connecting rod 2 is fixedly connected with a locking rod 5. Each of the four corners of one end of the external rod 1 is provided with a connecting groove 6. Each side of the outer wall of the locking rod 5 is provided with a groove 17. Each side of the inner wall of the groove 17 is fixedly connected with a support rod 7. The outer wall of the support rod 7 is rotatably connected with a connecting piece 8. Each side of the connecting piece 8 is fixedly connected with a locking block 9. Each side of the inner wall of the connecting groove 6 is provided with a locking groove 12. The outer wall of the locking block 9 is locked in the inner wall of the locking groove 12. Each lower surface of the connecting piece 8 is hinged with a telescopic rod 10. The bottom end of the telescopic rod 10 is hinged to the inner surface of the groove 17. The outer wall of the telescopic rod 10 is sleeved with a spring 11.

[0023] In this embodiment, the connecting rod 3 at the front end of the connecting rod 2 is aligned with the slot 4 of the external rod 1, and then both are pushed in axially. At the same time as the connecting rod 3 is inserted, the locking rods 5 at the four corners of the connecting rod 2 also slide into the connecting grooves 6 at the four corners of the external rod 1. The connecting piece 8 on the locking rod 5 has a slope. When the locking rod 5 slides in, this slope will contact the edge of the connecting groove 6 and be pressed inward. This pressure causes the connecting piece 8 to rotate around the support rod 7. At the same time, the spring 11 on its outer wall is compressed by the telescopic rod 10, storing elastic potential energy. At this time, the connecting piece 8 will retract inside the groove 17. When the locking rod 5 is fully inserted into the connecting groove 6 and reaches the predetermined position, the locking block 9 on the connecting piece 8 is exactly aligned with the locking groove 12 on the inner wall of the connecting groove 6. At this time, the compressed spring 11 releases energy instantly, pushing the telescopic rod 10, causing the connecting piece 8 to quickly spring back and reset. The straight locking block 9 on it is then firmly locked into the locking groove 12, which strengthens the axial pull-out resistance and, more importantly, provides strong torsional and shear resistance.

[0024] Furthermore, an elastic piece 13 is fixedly connected to one end of the connecting rod 3, and a hook piece 14 is fixedly connected to one end of the elastic piece 13. A sliding groove 15 is provided on one side of the inner side of the outer connecting rod 1, and a hook groove 16 is provided on one side of the sliding groove 15. The outer wall of the hook piece 14 is slidably connected to the inner wall of the sliding groove 15, and one side of the hook piece 14 is engaged with one side of the hook groove 16.

[0025] During the insertion of the connecting rod 3, the four elastic plates 13 at the end of the connecting rod 3 and the hook plate 14 at its end will first enter the sliding groove 15 inside the outer connecting rod 1. The inner wall of the sliding groove 15 is sloped, which guides and squeezes the arc-shaped hook plate 14 inward, causing the outer diameter of the elastic plate 13 to shrink, thus allowing the hook plate 14 to slide smoothly in the sliding groove 15. When the connecting rod 3 is pushed into the predetermined position, the hook plate 14 will reach the position of the hook groove 16. Since the space of the hook groove 16 is larger than the shrinking hook plate 14, the elastic plate 13 will immediately rebound, driving the hook plate 14 to "click" into the hook groove 16. At this time, the internal locking is completed. The cooperation between the hook plate 14 and the hook groove 16 effectively prevents the connecting rod 2 from being accidentally pulled out axially from the outer connecting rod 1.

[0026] Preferably, four elastic plates 13 are provided, and the four elastic plates 13 are arranged at equal angles with the center of the connecting rod 3 as the center; the elastic plates 13 are arc-shaped, and the hook plates 14 are trapezoidal; the maximum diameter of the four hook plates 14 when they are open is equal to the inner diameter of the slide groove 15, and the maximum diameter of the four hook plates 14 when they are open is equal to the inner diameter of the hook groove 16; the connecting plate 8 is inclined, and the locking block 9 is straight; the inner wall of the slide groove 15 is sloped.

[0027] The working principle and usage process of this utility model are as follows: The connecting rod 3 at the front end of the connecting rod 2 is aligned with the slot 4 of the outer rod 1, and then both are pushed in axially. Simultaneously, the locking rods 5 at the four corners of the connecting rod 2 slide into the connecting grooves 6 at the four corners of the outer rod 1. The connecting piece 8 on the locking rod 5 has an inclined surface. When the locking rod 5 slides in, this inclined surface contacts the edge of the connecting groove 6 and is pressed inward. This pressure causes the connecting piece 8 to rotate around the support rod 7. At the same time, the spring 11 on its outer wall is compressed by the telescopic rod 10, storing elastic potential energy. At this time, the connecting piece 8 retracts inside the groove 17. When the locking rod 5 fully enters the connecting groove 6 and reaches the predetermined position, the locking block 9 on the connecting piece 8 is precisely aligned with the locking groove 12 on the inner wall of the connecting groove 6. At this moment, the compressed spring 11 instantly releases energy, pushing the telescopic rod 10, causing the connecting piece 8 to quickly spring back to its original position. The locking block 9 is firmly locked into the locking groove 12, which strengthens the axial pull-out resistance and, more importantly, provides strong resistance to torsion and shear. At the same time, during the pushing of the connecting rod 3, the four elastic plates 13 at the end of the connecting rod 3 and the hook plate 14 at the end will first enter the sliding groove 15 inside the outer rod 1. The inner wall of the sliding groove 15 is sloped. This slope will guide and squeeze the arc-shaped hook plate 14 inward, causing the outer diameter of the elastic plate 13 to shrink, so that the hook plate 14 can slide smoothly in the sliding groove 15. When the connecting rod 3 is pushed into the predetermined position, the hook plate 14 will reach the position of the hook groove 16. Since the space of the hook groove 16 is larger than the shrinking hook plate 14, the elastic plate 13 will immediately rebound, driving the hook plate 14 to "click" into the hook groove 16. At this time, the internal locking is completed. The cooperation between the hook plate 14 and the hook groove 16 effectively prevents the connecting rod 2 from being accidentally pulled out of the outer rod 1 axially.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel cast steel node interface, comprising an external rod (1) and a connecting rod (2), characterized in that: One end of the external rod (1) is provided with a slot (4), and one end of the connecting rod (2) is provided with a docking rod (3). The outer wall of the docking rod (3) is slidably connected to the inner wall of the slot (4). One end of the connecting rod (2) is fixedly connected with a locking rod (5) at each of the four corners. One end of the external rod (1) is provided with a connecting groove (6) at each of the four corners. One side of the outer wall of the locking rod (5) is provided with a groove (17). One side of the inner wall of the groove (17) is fixedly connected with a support rod (7). The outer wall of the support rod (7) is rotatably connected to a connecting piece (8), and a locking block (9) is fixedly connected to one side of the connecting piece (8). A locking groove (12) is provided on one side of the inner wall of the connecting groove (6). The outer wall of the locking block (9) is locked in the inner wall of the locking groove (12). A telescopic rod (10) is hinged to the lower surface of the connecting piece (8). The bottom end of the telescopic rod (10) is hinged to the inner surface of the groove (17). A spring (11) is sleeved on the outer wall of the telescopic rod (10).

2. The novel cast steel node interface according to claim 1, characterized in that: One end of the connecting rod (3) is fixedly connected to an elastic piece (13), and one end of the elastic piece (13) is fixedly connected to a hook piece (14). A sliding groove (15) is provided on one side of the inner side of the external connecting rod (1), and a hook groove (16) is provided on one side of the sliding groove (15). The outer wall of the hook piece (14) is slidably connected to the inner wall of the sliding groove (15), and one side of the hook piece (14) is engaged with one side of the hook groove (16).

3. The novel cast steel node interface according to claim 2, characterized in that: Four elastic sheets (13) are provided, and the four elastic sheets (13) are arranged at equal angles with the center of the connecting rod (3) as the center.

4. A novel cast steel node interface according to claim 2, characterized in that: The elastic sheet (13) is arc-shaped, and the hook sheet (14) is trapezoidal.

5. A novel cast steel node interface according to claim 2, characterized in that: The maximum diameter of the four hooks (14) when they are open is equal to the inner diameter of the groove (15), and the maximum diameter of the four hooks (14) when they are open is equal to the inner diameter of the groove (16).

6. A novel cast steel node interface according to claim 1, characterized in that: The connecting piece (8) is set with an inclined surface, and the locking block (9) is set with a straight surface.

7. A novel cast steel node interface according to claim 5, characterized in that: The inner wall of the chute (15) is sloped.

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