A connection node for a large-span space frame structure

Abstract

This utility model provides a connection node for a large-span space frame structure, belonging to the technical field of space frame structures. It includes a ball joint and a support set on the side wall of the ball joint. The outer wall of the ball joint has multiple threaded grooves. One end of the support is provided with a screw threaded to the inner wall of the threaded grooves. A threaded sleeve is installed on the outer wall of the screw, and an annular groove is formed on the side wall of the threaded sleeve. A limit ring is installed on the outer wall of the annular groove. This utility model, through the provision of a support plate, forms an additional support structure in the connection area between the screw and the ball joint, effectively enhancing the overall connection strength. This dual support mechanism avoids the loosening problems that may occur if only the screw is used for connection, significantly improving the reliability of the connection. Simultaneously, the shock-absorbing spring not only absorbs vibration energy but also provides continuous elastic pressure to the support plate, further enhancing the stability of the support plate, thereby ensuring that the entire connection node has excellent fixing strength and long-term reliability.

Description

Technical Field

[0001] This utility model relates to the field of space frame structure technology, and more specifically, to a connection node for a large-span space frame structure. Background Technology

[0002] Large-span space frame structures are widely used in various buildings with spans exceeding 30m due to their rational spatial stress distribution, high overall stiffness, light weight, and excellent seismic performance, becoming a key structural solution for addressing large-space coverage issues. In the field of public buildings, large stadiums (such as stadium roofs that can accommodate tens of thousands of people), exhibition halls (requiring column-free, large spaces to accommodate exhibition layouts), airport terminals (high-traffic, open waiting areas), and railway station waiting halls all extensively utilize space frame structures as roofs or main load-bearing structures.

[0003] In existing technologies, common space frame structures typically use screws and ball joints as the main connection and fixing methods. While this connection method is simple and practical, it presents significant safety hazards in actual applications. When the structure relies solely on a single screw for connection, repeated friction occurs between the screw and the threaded groove inside the ball joint when subjected to external vibrations or continuous vibration loads. This continuous friction leads to gradual wear of the material on the threaded contact surface, resulting in an increase in the threaded clearance. As the wear intensifies, the fastening force between the screw and the ball joint weakens, potentially causing significant loosening at the connection point, thus affecting the overall strength and stability of the entire space frame structure. Therefore, inventing a connection node for large-span space frame structures to solve these problems has become a pressing issue for those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a connection node for a large-span space frame structure, aiming to solve the problem that common space frame structures usually use screws and ball joints as the main connection and fixing methods. Although this connection method is simple and practical, it has obvious safety hazards in actual applications.

[0005] This utility model is implemented as follows: This utility model provides a connection node for a large-span space frame structure, including a ball node and a support set on the side wall of the ball node, wherein the outer wall of the ball node is provided with multiple threaded grooves; One end of the bracket is provided with a screw that is threaded to the inner wall of the threaded groove. A threaded sleeve is installed on the outer wall of the screw. An annular groove is opened on the side wall of the threaded sleeve. A limit ring, a shock-absorbing spring and a support plate are installed on the outer wall of the annular groove.

[0006] Preferably, one end of the bracket is fixedly connected to a screw, the threaded sleeve is threadedly connected to the screw, the outer wall of the annular groove is fixedly connected to the inner wall of the limiting ring, the two side walls of the shock-absorbing spring are respectively fixedly connected to the outer walls of the limiting ring and the support plate, and the inner wall of the limiting ring is rotatably connected to the outer wall of the fixed ring.

[0007] Preferably, four axisymmetric positioning rods are installed on the side wall of the ball node near the threaded groove, and multiple positioning grooves are provided on the support plate to be inserted into the positioning rods. The positioning grooves are frustoconical grooves.

[0008] Preferably, the end of the positioning groove near the ball node has a large opening, and one end of the positioning rod has a notch. The sidewalls of the notch are respectively provided with an adjustment groove, a sliding groove, and a fixing groove.

[0009] Preferably, a positioning block is installed on the notch, and an adjusting spring and a sliding rod are respectively installed on the side wall of the positioning block. The two end side walls of the adjusting spring are fixedly connected to the side wall of the adjusting groove and the side wall of the positioning block, respectively, and the outer wall of the sliding rod is slidably connected to the inner wall of the groove.

[0010] Preferably, a groove is provided on one side of the positioning block, and a bolt is slidably connected to the inner wall of the groove, and the bolt is threadedly connected to the inner wall of the fixing groove.

[0011] The beneficial effects of this utility model are: The additional support structure formed by the support plate in the connection area of ​​the screw and ball joint effectively enhances the overall support strength of the connection. This dual support mechanism avoids the loosening problem that may be caused by relying solely on the screw connection, significantly improving the reliability of the connection. At the same time, the shock-absorbing spring can not only absorb vibration energy, but also provide continuous elastic pressure to the support plate, further enhancing the stability of the support plate, thereby ensuring that the entire connection node has excellent fixing strength and long-term reliability. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the connection node structure of a large-span space frame structure provided by an embodiment of the present invention; Figure 2 This is a half-sectional view of the connection node structure of a large-span space frame structure provided by an embodiment of this utility model; Figure 3 This utility model provides a connection node for a large-span space frame structure. Figure 2 Enlarged view of the structure of region A in the middle; Figure 4 This is a partial structural cross-sectional view of a connection node in a large-span space frame structure provided by an embodiment of this utility model; Figure 5 This utility model provides a connection node for a large-span space frame structure. Figure 4 Enlarged view of the structure of region B in the middle.

[0014] In the diagram: 1. Ball joint; 11. Threaded groove; 2. Bracket; 21. Screw; 3. Threaded sleeve; 31. Ring groove; 32. Fixing ring; 4. Limiting ring; 41. Shock-absorbing spring; 42. Support plate; 43. Positioning groove; 5. Positioning rod; 51. Notched groove; 52. Adjusting groove; 53. Sliding groove; 54. Fixing groove; 6. Positioning block; 61. Embedded groove; 62. Adjusting spring; 63. Sliding rod; 64. Bolt. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only 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 scope of protection of this utility model.

[0016] Example, refer to Figures 1-5 A connection node for a large-span space frame structure includes a ball node 1 and a support 2 disposed on the side wall of the ball node 1. The outer wall of the ball node 1 is provided with multiple threaded grooves 11. One end of the bracket 2 is provided with a screw 21 that is threaded to the inner wall of the threaded groove 11. A threaded sleeve 3 is installed on the outer wall of the screw 21. An annular groove 31 is opened on the side wall of the threaded sleeve 3. A limit ring 4, a shock-absorbing spring 41 and a support plate 42 are installed on the outer wall of the annular groove 31.

[0017] Furthermore; one end of the bracket 2 is fixedly connected to a screw 21, the threaded sleeve 3 is threadedly connected to the screw 21, the outer wall of the annular groove 31 is fixedly connected to the inner wall of the limiting ring 4, the two side walls of the shock-absorbing spring 41 are respectively fixedly connected to the outer walls of the limiting ring 4 and the support plate 42, the inner wall of the limiting ring 4 is rotatably connected to the outer wall of the fixed ring 32, four axisymmetric positioning rods 5 are installed on the side wall of the ball joint 1 near the threaded groove 11, and the support plate 42 is provided with multiple positioning grooves 43 that are inserted into the positioning rods 5. The positioning grooves 43 are frustoconical grooves, and the end of the positioning groove 43 near the ball joint 1 The positioning rod 5 has a notch 51 at one end, and the side wall of the notch 51 has an adjustment groove 52, a sliding groove 53 and a fixing groove 54 respectively. A positioning block 6 is installed on the notch 51. An adjustment spring 62 and a sliding rod 63 are installed on the side wall of the positioning block 6 respectively. The two side walls of the adjustment spring 62 are fixedly connected to the adjustment groove 52 and the side wall of the positioning block 6 respectively. The outer wall of the sliding rod 63 is slidably connected to the inner wall of the sliding groove 53. A groove 61 is provided on one side of the positioning block 6. A bolt 64 is slidably connected to the inner wall of the groove 61. The bolt 64 is threadedly connected to the inner wall of the fixing groove 54.

[0018] It should be noted that: First, the screw 21 at one end of the bracket 2 needs to be precisely aligned with the pre-machined threaded groove 11 on the outer wall of the ball joint 1. The screw 21 is then rotated to fix its threads to the threaded groove 11. During this connection process, the threaded sleeve 3 fitted on the outside of the screw 21 will synchronously generate axial displacement as the screw 21 rotates. The movement of the threaded sleeve 3 will drive the fixing ring 32 at its end to move together. During the movement, the fixing ring 32 will gradually compress the shock-absorbing spring 41 installed on the limiting ring 4, causing the limiting ring 4 to generate corresponding displacement. As the limiting ring 4 moves, the support plate 42 connected to it slides smoothly along the guide direction of the positioning rod 5, so that the contact surface of the support plate 42 is tightly attached to the side wall surface of the ball joint 1. By increasing the contact area between the support plate 42 and the ball joint 1, an additional support structure is formed in the connection area between the screw 21 and the ball joint 1, which effectively enhances the support strength of the overall connection. This dual support mechanism avoids the loosening problem that may be caused by relying solely on the screw 21 for connection, and significantly improves the reliability of the connection. At the same time, the shock-absorbing spring 41 can not only absorb vibration energy, but also provide continuous elastic pressure to the support plate 42, further enhancing the stability of the support plate 42, thereby ensuring that the entire connection node has excellent fixing strength and long-term reliability. When the positioning block 6 is in full contact with the positioning rod 5, it forms a complete column. As the support plate 42 passes through the positioning rod 5 and approaches the ball joint 1, when the bracket 2 and the ball joint 1 are connected, the positioning block 6 on the notch 51 of the positioning rod 5 first contacts the inner wall of the positioning groove 43. As the insertion operation deepens, the opening of the positioning groove 43 that contacts the positioning block 6 gradually becomes smaller, thereby causing the positioning block 6 to compress the adjusting spring 62, causing it to move to one side of the positioning rod 5 until the positioning block 6 passes through the positioning groove 43 on the support plate 42. At this time, the support plate 42 is tightly pressed against the side wall of the ball joint 1, achieving support and fixation. At this time, the positioning block 6 is reset under the restoring force of the adjusting spring 62, thereby locking into the connection between the positioning rod 5 and the positioning groove 43, further fixing the position of the support plate 42. Multiple positioning rods 5 and positioning blocks 6 cooperate with each other to fix the support plate 42, thereby strengthening the connection between the screw 21 and the ball joint 1 and enhancing the fixing effect around the screw 21. This further prevents wear between the screw 21 and the threaded groove 11 due to shaking, thereby improving the overall connection strength of the space frame. During subsequent disassembly, the bolt 64 is inserted into the groove 61 and rotated to screw it into the fixing groove 54, forcing the positioning block 6 to compress the adjusting spring 62, so that the positioning block 6 and the positioning rod 5 fit together as a cylindrical whole. At this time, the support plate 42 can be removed, which can realize quick disassembly and facilitate comprehensive rust prevention treatment of each independent component. It can effectively prevent the connection parts from rusting due to long-term exposure to a humid environment, thereby ensuring that the connection between each component is firm and reliable. At the same time, each component after rust prevention treatment and surface renovation can be reassembled and used, which greatly reduces the cost of equipment maintenance and replacement.

[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A connection node for a large-span space frame structure, comprising a ball node (1) and a support (2) disposed on the side wall of the ball node (1), characterized in that, The outer wall of the ball node (1) is provided with multiple threaded grooves (11); One end of the bracket (2) is provided with a screw (21) that is threaded to the inner wall of the threaded groove (11). A threaded sleeve (3) is installed on the outer wall of the screw (21). An annular groove (31) is opened on the side wall of the threaded sleeve (3). A limit ring (4), a shock-absorbing spring (41) and a support plate (42) are installed on the outer wall of the annular groove (31).

2. The connection node of a large-span space frame structure according to claim 1, characterized in that, One end of the bracket (2) is fixedly connected to a screw (21), the threaded sleeve (3) and the screw (21) are threadedly connected, the outer wall of the annular groove (31) and the inner wall of the limiting ring (4) are fixedly connected, the two side walls of the shock-absorbing spring (41) are fixedly connected to the outer walls of the limiting ring (4) and the support plate (42) respectively, and the inner wall of the limiting ring (4) and the outer wall of the fixed ring (32) are rotatably connected.

3. The connection node of a large-span space frame structure according to claim 2, characterized in that, Four axisymmetric positioning rods (5) are installed on the side wall of the ball node (1) near the threaded groove (11). The support plate (42) has multiple positioning grooves (43) that are inserted into the positioning rods (5). The positioning grooves (43) are frustum-shaped grooves.

4. The connection node of a large-span space frame structure according to claim 3, characterized in that, The positioning groove (43) has a large opening at one end near the ball node (1), and a notch (51) is provided at one end of the positioning rod (5). The side wall of the notch (51) is provided with an adjustment groove (52), a sliding groove (53) and a fixing groove (54).

5. The connection node of a large-span space frame structure according to claim 4, characterized in that, A positioning block (6) is installed on the notch (51). An adjusting spring (62) and a sliding rod (63) are respectively installed on the side wall of the positioning block (6). The two side walls of the adjusting spring (62) are fixedly connected to the side wall of the adjusting groove (52) and the side wall of the positioning block (6), respectively. The outer wall of the sliding rod (63) is slidably connected to the inner wall of the groove (53).

6. The connection node of a large-span space frame structure according to claim 5, characterized in that, The positioning block (6) has a groove (61) on one side, and a bolt (64) is slidably connected to the inner wall of the groove (61). The bolt (64) is threadedly connected to the inner wall of the fixing groove (54).

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