A lower node of a cable dome structure

Abstract

The present invention discloses a lower node of a strut of a cable dome structure, comprising a strut, a collar, and a rotating connector. The collar is mounted on the strut via a first bearing and can rotate freely relative to the strut. The collar is provided with a connecting rod extending radially outward, and the connecting rod is provided with a mounting rod perpendicular to the axis of the connecting rod and the collar. The rotating connector is mounted on the mounting rod via a second bearing, and the rotating connector is provided with a connecting ear. By adopting the above technical solution, the lower node of the strut of the cable dome structure of the present invention solves the problem caused by the inability of the connected rods to rotate during construction, and provides a new node form. The collar and the first bearing realize rotation around the strut as the axis, and the rotating connector and the second bearing realize rotation around the mounting rod as the axis, thereby meeting the requirements for angle changes between the rods during construction, improving construction quality, and increasing structural safety.

Description

Technical Field

[0001] The invention relates to a lower node of a support rod of a cable dome structure, belonging to the technical field of construction engineering. Background Art

[0002] A cable dome is a prestressed spatial structure, a self-supporting, self-stressing spatial grid structure composed of a set of discontinuous compression members and a set of continuous tension members. The structure's stiffness is provided by the balanced prestress between the tension and compression members. Before prestressing, the structure has almost no stiffness, and the magnitude of the initial prestress plays a decisive role in determining its shape and stiffness. Nodes are key components that maximize the structural advantage. The positional relationships between the various components of a cable dome structure do not change in unison during the forming process, and it is difficult to ensure that the circumferential members remain in the same plane. Therefore, universal rotation of the members around the nodes is required. Existing cable dome nodes often use traditional spherical nodes, where the positional relationships of the members are fixed. This leads to unnecessary and undesirable internal forces during construction, compromising structural safety and forming quality. Furthermore, the high-stress members in cable domes are often designed as single members, resulting in an insufficient safety margin. Summary of the Invention

[0003] Therefore, an object of the present invention is to provide a lower node of a support rod of a cable dome structure to solve the problem caused by the rod members being unable to rotate freely during the construction process.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a lower node of a support rod of a cable dome structure, comprising a support rod, a collar and a rotating connector, wherein the collar is mounted on the support rod through a first bearing and can rotate freely relative to the support rod, the collar is provided with a connecting rod extending radially outward, and the connecting rod is provided with a mounting rod perpendicular to the axis of the connecting rod and the collar; the rotating connector is mounted on the mounting rod through a second bearing, and the rotating connector is provided with a connecting ear.

[0005] A plurality of connecting ears are provided on the rotating mounting member.

[0006] The connecting rod is connected to the middle part of the mounting rod; the rotating connecting member includes two side plate parts, and the two ends of the mounting rod are respectively mounted on one of the side plate parts through a second bearing.

[0007] The plane where the side plate portion is located and the plane where the connecting ear is located are perpendicular to each other.

[0008] Two of the collars are mounted on the support rod.

[0009] An annular ring groove is provided on one side of the ring, and an annular ring ridge is provided at a position corresponding to the ring groove on the other side.

[0010] A bottom plate is provided at the end of the support rod, and an annular cover plate is sleeved on the support rod. The bottom plate and the cover plate clamp the ring therebetween.

[0011] A bottom plate groove matched with the collar ridge is provided on the bottom plate; and a cover plate ridge matched with the collar groove is provided on the cover plate.

[0012] The first bearing comprises a first bearing inner ring and a first bearing outer ring. The first bearing inner ring is installed on the support rod with an interference fit, and the first bearing outer ring is installed in the collar with an interference fit.

[0013] The second bearing includes a second bearing inner ring and a second bearing outer ring. The second bearing inner ring is installed on the mounting rod with an interference fit, and the second bearing outer ring is installed in the mounting hole of the side plate with an interference fit.

[0014] By adopting the above technical solution, the lower node of the support rod of the cable dome structure of the present invention solves the problem caused by the inability of the connected rods to rotate during the construction process, and provides a new node form. The rotation around the support rod is achieved through the ring and the first bearing, and the rotation around the installation rod is achieved through the rotating connector and the second bearing. This meets the requirements for the change of the angle between the rods during the construction process, improves the construction quality, and increases the structural safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a structural diagram of an embodiment of a lower node of a cable dome structure support rod of the present invention.

[0016] Figure 2 This is a cross-sectional view of the lower node of the cable dome structure support.

[0017] Figure 3 Schematic diagram of the base plate structure.

[0018] Figure 4 Schematic diagram of the structure of the ring.

[0019] Figure 5 Schematic diagram of the structure of the first bearing.

[0020] Figure 6 Schematic diagram of the cover structure.

[0021] Figure 7 Schematic diagram of the structure of the second bearing.

[0022] Figure 8 Schematic diagram of the structure of the rotating connection.

[0023] In the figure: 1. base plate; 2. collar; 3. first bearing; 4. cover plate; 5. second bearing; 6. rotating connector; 7. strut; 8. inner wall of collar; 9. connecting rod; 10. connecting rod; 11. mounting rod; 12. first bearing inner ring; 13. first bearing outer ring; 14. cover plate hole; 15. second bearing inner ring; 16. second bearing outer ring; 17. mounting hole; 18. connecting ear; 19. gap; 20. connecting ear hole; 21. base plate groove; 22. collar ridge; 23. collar groove; 24. cover plate ridge. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] As shown in the figure, this embodiment provides a lower node of a strut 7 of a cable dome structure, comprising a strut 7, a collar 2, and a rotary connector 6. The collar 2 is mounted on the strut 7 via a first bearing 3 and is able to rotate freely relative to the strut 7. The first bearing 3 includes a first bearing inner ring 12 and a first bearing outer ring 13. The first bearing inner ring 12 is mounted on the strut 7 with an interference fit, and the first bearing outer ring 13 is mounted within the collar 2 with an interference fit.

[0026] The collar 2 is provided with a connecting rod 9, which includes a connecting rod 10 extending radially outward. A mounting rod 11 is provided on the connecting rod 10, perpendicular to the axis of the connecting rod 10 and the collar 2. The connecting rod 10 is connected to the middle portion of the mounting rod 11. The rotary connector 6 includes two parallel side panels, each with a mounting hole 17. The mounting rod 11 is mounted on one of the side panels at each end via a second bearing 5. The second bearing 5 includes a second bearing inner ring 15 and a second bearing outer ring 16. The second bearing inner ring 15 is mounted on the mounting rod 11 with an interference fit, while the second bearing outer ring is mounted in the mounting hole 17 of the side panel with an interference fit.

[0027] The rotating connector 6 is provided with a plurality of connecting lugs 18. In this embodiment, each rotating connector 6 has two connecting lugs 18 for connecting two rods. This allows the original rod with a larger cross-sectional area to be replaced with two rods with smaller cross-sectional areas, effectively increasing the safety and stability of the structure without changing the overall cross-sectional area. Of course, in other embodiments, the connecting lugs 18 may also be three, four, or another number.

[0028] The plane where the side plate portion is located is perpendicular to the plane where the connecting ears 18 are located, and are respectively located on both sides of the rotating connector 6, thereby increasing the structural strength of the rotating connector 6 and further improving safety and stability.

[0029] In this embodiment, two collars 2 are mounted on the strut 7, allowing connection to the rod 9 from two directions. An annular collar groove 23 is provided on one side of the collar 2, and an annular collar ridge 22 is provided on the other side at a position corresponding to the collar groove 23. When the two collars 2 are mounted on the strut 7, they are stacked, and the collar groove 23 of one collar cooperates with the collar ridge 22 of the other collar to reduce friction during relative rotation between the two collars.

[0030] The end of the support rod 7 is provided with a base plate 1, and an annular cover plate 4 is also mounted on the support rod 7. The base plate 1 and the cover plate 4 clamp the collar 2. The base plate 1 is provided with a base plate groove 21 that mates with the collar ridge 22; the cover plate 4 is provided with a cover plate ridge 24 that mates with the collar groove 23, also used to reduce friction when the components rotate relative to each other.

[0031] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A lower node of a cable dome structure, characterized by: The invention comprises a support rod, a collar and a rotating connector, wherein the collar is mounted on the support rod via a first bearing and can rotate freely relative to the support rod, the collar is provided with a connecting rod extending radially outward, and the connecting rod is provided with a mounting rod perpendicular to the axis of the connecting rod and the collar; the rotating connector is mounted on the mounting rod via a second bearing, and the rotating connector is provided with a connecting ear; Two of the collars are mounted on the support rod; The end of the support rod is provided with a bottom plate; The connecting rod is connected to the middle part of the mounting rod; the rotating connecting member includes two side plates, and the two ends of the mounting rod are respectively mounted on one of the side plates through a second bearing; The plane where the side plate portion is located and the plane where the connecting ear is located are perpendicular to each other.

2. The lower node of the cable dome structure according to claim 1, wherein: A plurality of connecting ears are provided on the rotating mounting member.

3. The lower node of the cable dome structure according to claim 1, wherein: An annular ring groove is provided on one side of the ring, and an annular ring ridge is provided at a position corresponding to the ring groove on the other side.

4. The lower node of the cable dome structure according to claim 3, characterized in that: An annular cover plate is sleeved on the support rod, and the base plate and the cover plate clamp the ring therebetween.

5. The lower node of the cable dome structure according to claim 4, characterized in that: A bottom plate groove matched with the collar ridge is provided on the bottom plate; and a cover plate ridge matched with the collar groove is provided on the cover plate.

6. The lower node of a cable dome structure according to claim 1 or 2, characterized in that: The first bearing comprises a first bearing inner ring and a first bearing outer ring. The first bearing inner ring is installed on the support rod with an interference fit, and the first bearing outer ring is installed in the collar with an interference fit.

7. The lower node of a cable dome structure according to claim 1 or 2, characterized in that: The second bearing includes a second bearing inner ring and a second bearing outer ring. The second bearing inner ring is installed on the mounting rod with an interference fit, and the second bearing outer ring is installed in the mounting hole of the side plate with an interference fit.

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