Adjustable truss node device

Abstract

An adjustable truss node device comprises a node and a truss member; the node is hemispherical and has a plurality of adjustment holes evenly distributed; the adjustment hole comprises a through hole and a limiting groove from the inside to the outside; the through hole and the limiting groove have the same cross-section, and the centers coincide but are staggered; the inner walls at both ends of the truss member are respectively provided with internal threads A and B of opposite rotation directions, and the outer walls are correspondingly provided with external threads A and B; the internal threads A / B rotate to match the adjusting screw A / B; the ends of the adjusting screws A and B match the cross-section of the through hole; the ends of the adjusting screws A and B can pass through the through hole and be limited by the limiting groove to be connected to the node; the threaded section of the adjusting screw A / B rotates to match the fixing nut A / B and the anti-loosening nut A / B; the fixing nut A / B and the adjusting screw A / B clamp the fixed node; the anti-loosening nut A / B prevents the fixing nut A / B and the truss member from loosening respectively; the evenly distributed adjustment holes can ensure the orientation angle of the truss member; the truss member and the adjusting screws A and B match the designed distance of the node.

Description

Technical Field

[0001] The present invention relates to the technical field of truss structure connection, in particular to an adjustable truss node device. Background Art

[0002] Steel structures are made of steel and are one of the main types of building structures. They primarily consist of components such as beams, columns, and trusses, made from sections of steel and steel plates. A truss is a structure composed of members connected at both ends by hinges. Trusses are typically triangular units, typically in planar or spatial configurations, composed of straight rods. Truss members primarily bear axial tension or compression, fully utilizing the material's strength. For larger spans, they can save material, reduce weight, and increase rigidity compared to solid beams. Currently, truss construction methods involve individually machining each node and truss member on the ground. Alternatively, the entire truss structure can be assembled and welded on the ground, then hoisted to the desired height using crane equipment for secondary assembly and welding. Alternatively, the individually machined nodes and truss members can be hoisted to the desired height, whereupon workers can assemble and weld them from overhead. Generally speaking, the first method is chosen for large buildings to reduce the time workers spend working at height and avoid accidents. However, no matter which construction method is used, there are two problems in the assembly and welding process of nodes and truss members: 1. It is difficult to ensure that the length of the individually processed truss members is adapted to the designed distance between the two nodes to be installed. Since the truss members are large-span workpieces, it is easy for the individually processed truss members to have errors so that the two nodes cannot be connected, which easily leads to material waste of the truss members. 2. The orientation angles between different truss members at the same node are difficult to guarantee. Since the truss structure is connected by truss members at many nodes, even the accumulated orientation angle errors of the truss members at a single node may cause huge deviations in the entire truss structure. This is a difficult problem in the construction process of the truss structure. The above two problems have not been well solved in the existing technology. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems and provide an adjustable truss node device.

[0004] The technical solution of the present invention is: an adjustable truss node device, including a node and a truss member,

[0005] The node includes a hemispherical outer surface and a hemispherical inner surface; a plurality of adjustment holes are distributed on the outer surface of the node; each adjustment hole includes a through hole penetrating the inner and outer surfaces of the node and a limiting groove recessed from the inside of the node to the outside of the node; the through hole and the limiting groove have the same cross-section and their centers coincide; the cross-sectional profiles of the through hole and the limiting groove are staggered;

[0006] The truss member is a hollow tubular structure, with internal threads A and B provided on the inner walls at both ends respectively, with opposite rotation directions, and external threads A and B provided on the outer walls at both ends respectively, with the same rotation direction as the internal threads A and the same rotation direction as the internal threads B; the pitch and tooth shape of the internal threads A and B are the same; the pitch and tooth shape of the external threads A and B are the same;

[0007] The internal thread A is rotatably matched with the adjusting screw A; the internal thread B is rotatably matched with the adjusting screw B; the end sections of the adjusting screws A and B are the same and match the cross sections of the through hole and the limiting groove;

[0008] The adjusting screw A is rotated from the end to the threaded section in sequence to fit with a fixing nut A and two anti-loosening nuts A; the end of the fixing nut A facing the node is provided with a fitting surface that matches the outer surface of the node, and the other end is provided with an external thread C that is identical to the external thread A; the end of the anti-loosening nut A near the node is provided with a sink hole; the inner wall of the large hole of the sink hole is provided with an internal thread C that rotates with the external thread C; the inner wall of the small hole of the sink hole is provided with an internal thread D that rotates with the threaded section of the adjusting screw A; the internal thread C of the other anti-loosening nut A rotates with the external thread A, and the internal thread D rotates with the threaded section of the adjusting screw A;

[0009] The adjusting screw B corresponds to the adjusting screw A, which is rotated from the end to the threaded section in sequence with a fixing nut B and two anti-loosening nuts B; one end of the fixing nut B is provided with a fitting surface identical to the fixing nut A, and the other end is provided with an external thread D identical to the external thread B; the end of the anti-loosening nut B near the node is provided with a sinking hole identical to the anti-loosening nut B; the inner wall of the large hole of the sinking hole is provided with an internal thread E that is rotationally matched with the external thread D; the inner wall of the small hole of the sinking hole is provided with an internal thread F that is rotationally matched with the threaded section of the adjusting screw B; the internal thread E of the other anti-loosening nut B is rotationally matched with the external thread B, and the internal thread D is rotationally matched with the threaded section of the adjusting screw B.

[0010] Preferably, a locking groove is provided in the middle of the truss rod.

[0011] Preferably, a flange is provided at the intersection of the inner and outer surfaces of the node; and a plurality of through holes are evenly distributed on the flange.

[0012] Preferably, the large hole depth of the sinking hole is greater than the thread length of the external thread A and the external thread B.

[0013] Preferably, the adjusting hole has rounded corners.

[0014] Preferably, the cross section of the end of the adjusting screw A is elliptical.

[0015] Preferably, the tooth shape of the internal thread nail is larger than the tooth shape of the external thread nail.

[0016] The beneficial effects of the present invention are as follows: the adjustable truss node device of the present invention comprises a node and a truss member; the node is hemispherical and has a plurality of adjustment holes evenly distributed; the adjustment hole comprises a through hole and a limiting groove from the inside to the outside; the through hole and the limiting groove have the same cross-section, and the centers coincide but are staggered; the inner walls at both ends of the truss member are respectively provided with internal threads A and B of opposite rotation directions, and the outer walls are correspondingly provided with external threads A and B; the internal threads A / B rotate to match the adjusting screw A / B; the ends of the adjusting screws A and B match the cross-section of the through hole; the ends of the adjusting screws A and B can pass through the through hole and be limited by the limiting groove and connected to the node; the threaded section of the adjusting screw A / B rotates to match the fixing nut A / B and the anti-loosening nut A / B; the fixing nut A / B and the adjusting screw A / B clamp the fixed node; the anti-loosening nut A / B prevents the fixing nut A / B and the truss member from loosening respectively; the evenly distributed adjustment holes can ensure the orientation angle of the truss member; the truss member and the adjusting screws A and B match the designed distance of the node. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structure of the adjustable truss node device of the present invention. Figure 1 ;

[0018] Figure 2 It is a three-dimensional structure of the adjustable truss node device of the present invention. Figure 2 ;

[0019] Figure 3 yes Figure 1 Bottom view of

[0020] Figure 4 This is the first embodiment Figure 3 Sectional view in the AA cutting direction;

[0021] Figure 5 yes Figure 4 I magnified view;

[0022] Figure 6 yes Figure 4 II enlarged view;

[0023] Figure 7 yes Figure 4 III magnified view;

[0024] Figure 8 It is a three-dimensional diagram of adjusting screw A or adjusting screw B;

[0025] Figure 9 It is a three-dimensional diagram of fixing nut A or fixing nut B;

[0026] Figure 10 is a sectional perspective view of the fixing nut A or the fixing nut B of the first embodiment;

[0027] Figure 11is a three-dimensional diagram of the locknut A or the locknut B of the first embodiment;

[0028] Figure 12 is a three-dimensional partial cross-sectional view of the truss member of the first embodiment;

[0029] Figure 13 In the second embodiment Figure 3 Sectional view in the AA cutting direction;

[0030] Figure 14 yes Figure 13 IV magnified view;

[0031] Figure 15 yes Figure 13 Magnified view of V;

[0032] Figure 16 yes Figure 13 VI enlarged view;

[0033] Figure 17 is a sectional perspective view of the fixing nut A or the fixing nut B of the second embodiment;

[0034] Figure 18 is a perspective view of the locknut A or the locknut B of the second embodiment;

[0035] Figure 19 is a three-dimensional partial cross-sectional view of a truss member of Example 2;

[0036] In the figure: 1. Node, 11. Through hole, 12. Limiting groove, 13. Flange, 131. Through hole, 2. Truss member, 21. Internal thread A, 22. Internal thread B, 23. External thread A, 24. External thread B, 251. Adjusting screw A, 252. Adjusting screw B, 253. End of adjusting screw A / B, 261. Fixing nut A, 2611. External thread C, 262. Fixing nut B, 2621. External thread D, 263. Fitting surface, 271. Locking nut A, 2711. Internal thread C, 2712. Internal thread D, 272. Locking nut B, 2721. Internal thread E, 2722. Internal thread F, 28. Screw groove. DETAILED DESCRIPTION

[0037] Example 1: See Figure 1-12 An adjustable truss node device includes a node and a truss member; the node and the truss member are the main components of the truss structure in the prior art; in the prior art, the node and the truss member are connected; the node and the truss member of the present invention are also connected, but the specific connection structure is different;

[0038] The node includes a hemispherical outer surface and a hemispherical inner surface; a plurality of adjustment holes are evenly distributed on the outer surface of the node; each adjustment hole corresponds to a fixed truss member orientation angle; each adjustment hole includes a through hole penetrating the inner and outer surfaces of the node and a limiting groove recessed from the inside of the node to the outside of the node; the through hole and the limiting groove have the same cross-section and their centers coincide; the cross-sectional profiles of the through hole and the limiting groove are staggered;

[0039] The truss member is a hollow tubular structure, with internal threads A and B provided on the inner walls at both ends respectively, with opposite rotation directions, and external threads A and B provided on the outer walls at both ends respectively, with the same rotation direction as the internal threads A and the same rotation direction as the internal threads B; the pitch and tooth shape of the internal threads A and B are the same; the pitch and tooth shape of the external threads A and B are the same;

[0040] The internal thread A is rotatably matched with the adjusting screw A; the internal thread B is rotatably matched with the adjusting screw B; the cross-sections of the ends of the adjusting screws A and B are the same, and both match the cross-sections of the through-hole and the limiting groove; in Example 1, the cross-sections of the adjusting screws A, B, the through-hole and the limiting groove are all elliptical; of course, the cross-section can also be a non-circular shape such as a rectangle; the ends of the adjusting screws A / B are successively matched with the through-hole and the limiting groove, that is, after passing through the through-hole, a limiting relationship is formed with the limiting groove; the specific process is as follows, after the ends of the adjusting screws A and B can pass through the through-hole, they can be slightly rotated to overlap with the limiting groove and then pulled back to fit into the limiting groove; this is also part of the operation of connecting the adjusting screws A and B with the node; after pulling back The ends of the adjusting screws A and B are constrained by the limiting grooves, losing the freedom of axial outward movement and axial rotation; when the truss member is rotated, the ends of the adjusting screws A and B will move toward or away from each other along the axial direction of the truss member; according to the on-site conditions, the truss member can be rotated correctly to form a preliminary connection relationship with the node with the help of the adjusting screws A and B; the reverse operation is the process of disassembling the truss member; thus, in the first embodiment, a connection relationship can be established outside the node by using the adjusting screws A / B, the through holes, and the limiting grooves, and the truss member can be disassembled and assembled without disassembling the node, which is very convenient; in this embodiment, whether the adjusting screw A or the adjusting screw B passes through the through hole is only related to the truss member connected to the node;

[0041] The adjusting screw A is rotated from the end to the threaded section in sequence to cooperate with a fixed nut A and two anti-loosening nuts A; the fixed nut A cooperates with the adjusting screw A to clamp the node in the middle; the fixed nut A is provided with a fitting surface that matches the outer surface of the node at one end facing the node, and an external thread C that is the same as the external thread A at the other end; the fitting surface can increase the contact area between the fixed nut A and the outer surface, so that the fixed nut A and the node form a stable fixed connection relationship; the anti-loosening nut A end near the node is provided with a sink hole; the inner wall of the large hole of the sink hole is provided with an internal thread C that rotates with the external thread C; the inner wall of the small hole of the sink hole is provided with an internal thread C that rotates with the thread section of the adjusting screw A Thread D; anti-loosening nut A connects the adjusting screw A and the fixed nut A together through the internal thread C and the internal thread D; wherein the internal thread C forms a bidirectional constraint on the axial movement of the fixed nut A, and has a preventive effect on the connection between the fixed nut A and the node through the adjusting screw A; the internal thread C of another anti-loosening nut A rotates with the external thread A, and the internal thread D rotates with the thread section of the adjusting screw A; similarly, this anti-loosening nut A connects the adjusting screw A to the truss member through the internal thread C and the internal thread D; wherein the internal thread C forms a bidirectional constraint on the axial movement of the truss member, and has a preventive effect on the connection between the truss member and the adjusting screw A;

[0042] The adjusting screw B corresponds to the adjusting screw A, which is rotated from the end to the threaded section in sequence to cooperate with a fixing nut B and two anti-loosening nuts B; corresponding to the adjusting rod A, the fixing nut B cooperates with the adjusting screw B to clamp the node in the middle; one end of the fixing nut B is provided with the same fitting surface as the fixing nut A, and the other end is provided with an external thread D that is the same as the external thread B; similarly, the fitting surface can increase the contact area between the fixing nut B and the outer surface, so that the fixing nut B forms a stable fixed connection relationship with the node; the end of the anti-loosening nut B near the node is provided with a sink hole that is the same as the anti-loosening nut B; the inner wall of the large hole of the sink hole is provided with an internal thread E that rotates with the external thread D; the inner wall of the small hole of the sink hole is provided with a The internal thread J of the threaded section of rod B rotates together; the anti-loosening nut B connects the adjusting screw B and the fixed nut B together through the internal thread E and the internal thread J; wherein the internal thread E forms a bidirectional constraint on the axial movement of the fixed nut B, and has an anti-loosening effect on the connection between the fixed nut B and the node through the adjusting screw B; the internal thread E of another anti-loosening nut B rotates together with the external thread B, and the internal thread D rotates together with the threaded section of the adjusting screw B; similarly, this anti-loosening nut B connects the adjusting screw B to the truss member through the internal thread E and the internal thread J; wherein the internal thread E forms a bidirectional constraint on the axial movement of the truss member, and has an anti-loosening effect on the connection between the truss member and the adjusting screw B.

[0043] A rotating groove is provided in the middle of the truss rod, which is used for tools such as wrenches to be inserted into the rotating truss rod, making construction easier.

[0044] A flange is provided at the intersection of the inner and outer surfaces of the node; a plurality of through holes are evenly distributed on the flange; two nodes can be buckled together and connected with bolts through the through holes of the flange to increase the choice of truss member orientation angles.

[0045] Since the external thread A is the same as the external thread C, and the external thread B is the same as the external thread D; the large hole depth of the countersunk hole is greater than the thread length of the external thread A and the external thread B; the corresponding external thread A or external thread C can form a complete match with the internal thread C, and the anti-loosening effect of the anti-loosening nut A can be guaranteed; the external thread B or external thread D can form a complete match with the internal thread D, and the anti-loosening effect of the anti-loosening nut B can be guaranteed.

[0046] The adjusting hole has rounded corners to facilitate the entry and fit of the end of adjusting screw A or adjusting screw B.

[0047] The cross-section of the end of adjusting screw A is the same as that of the end of adjusting screw B, and matches the cross-section of the through hole and the limit groove; the cross-section of the end of adjusting screw A is elliptical; the corresponding cross-sections of the through hole and the limit are also elliptical; compared with the rectangular or long hole shape, the elliptical cross-section is smaller and can be arranged more on the node.

[0048] Working process of embodiment 1:

[0049] Process 1: Connect two adjacent nodes of the truss:

[0050] Place two adjacent nodes at designated locations, and then select appropriate adjustment holes for each according to design requirements; temporarily place the truss member between the two nodes; prepare an adjusting bolt A on one side of the external thread A of the truss member; the adjusting bolt A is rotated from the end to assemble a fixing nut A and two anti-loosening nuts A in sequence; the fitting surface of the fixing nut A and the internal thread C of the middle anti-loosening nut A face the end of the adjusting bolt A; the internal thread C of the other anti-loosening nut A faces away from the end of the adjusting bolt A; prepare an adjusting bolt B on one side of the external thread B of the truss member; the adjusting bolt B is rotated from the end to assemble a fixing nut B and two anti-loosening nuts B in sequence; the fitting surface of the fixing nut B and the internal thread E of the middle anti-loosening nut B face the end of the adjusting bolt B; the internal thread E of the other anti-loosening nut B faces away from the end of the adjusting bolt B;

[0051] Establish the preliminary connection between adjusting screws A and B and the selected adjusting holes;

[0052] The end of the adjusting screw A passes through the through hole of the selected adjusting hole; then the adjusting screw A is slightly rotated so that the end profile of the adjusting screw A coincides with the profile of the limiting groove of the adjusting hole, and then the adjusting screw A is pulled back so that the end of the adjusting screw A is constrained by the limiting groove; the fixing nut A is tightened until the end of the adjusting screw A will not escape the constraint of the limiting groove and will not be completely fixed to the node; the initial connection of the adjusting screw A to the adjusting hole is established;

[0053] Refer to the preliminary connection establishment operation of adjusting screw A to establish the preliminary connection of adjusting screw B to the adjusting hole, and operate adjusting screw B and fixing nut B in sequence to ensure that the end of adjusting screw B will not break away from the constraint of the limit groove and will not be completely fixed to the node;

[0054] Set up the truss member so that the two ends of the truss member press against the adjusting screws A and B respectively. Rotate the truss member so that the ends of the adjusting screws A and B move toward each other along the axial direction of the truss member until they press against the limit grooves. Then rotate the fixing nuts A and B respectively so that the contact surfaces are in close contact with the outer surface of the node to form a fixed relationship.

[0055] Tighten the anti-loosening nuts A and B on the adjusting screws A and B respectively; the two anti-loosening nuts A on the adjusting screw A are respectively connected with the fixing nut A and the truss rod to form an anti-loosening structure; the two anti-loosening nuts B on the adjusting screw B are respectively connected with the fixing nut B and the truss rod to form an anti-loosening structure.

[0056] In the second step, truss members with different orientation angles at the same node are connected to the node.

[0057] The positions of the adjustment holes evenly distributed on the nodes are fixed. As long as the correct adjustment holes are selected according to the construction design and then referring to steps ②-④ in process one, the orientation angles of the two truss members at the same node can be ensured to be correct.

[0058] Since the truss structure has many nodes, there is a possibility of misidentifying the adjustment hole during the construction process; however, the wrong truss member cannot be connected to the adjacent node; thus, step ② of process one cannot be carried out; at this time, just replace the misidentified adjustment hole with the correct adjustment hole according to step ① of process one.

[0059] Example 2: See the attached Figure 1-3 , Instruction Manual Figure 13-19, Example 2 is basically the same as Example 1, and the similarities are not repeated here. The difference is that the tooth shape of the internal thread A is larger than the tooth shape of the external thread A; the internal thread A is mainly equipped with the adjusting screw A; the adjusting screw A is the main force-bearing component of the truss structure like the truss rod, and mainly bears axial tension or pressure. The large-tooth-shaped internal thread A has strong shear resistance and can improve the self-strength of the truss structure; the external thread A is mainly equipped with the anti-loosening nut A; the external thread A is mainly used in conjunction with the external thread C for anti-loosening function, and does not need to resist such a large axial tension or pressure like the internal thread A. The small-tooth-shaped external thread A can ensure the anti-loosening effect while saving materials.

Claims

1. An adjustable truss node device, comprising a node and a truss member, characterized in that: The node includes a hemispherical outer surface and a hemispherical inner surface; a plurality of adjustment holes are distributed on the outer surface of the node; each adjustment hole includes a through hole penetrating the inner and outer surfaces of the node and a limiting groove recessed from the inside of the node to the outside of the node; the through hole and the limiting groove have the same cross-section and their centers coincide; the cross-sectional profiles of the through hole and the limiting groove are staggered; The truss member is a hollow tubular structure, with internal threads A and B provided on the inner walls at both ends respectively, with opposite rotation directions, and external threads A and B provided on the outer walls at both ends respectively, with the same rotation direction as the internal threads A and the same rotation direction as the internal threads B; the pitch and tooth shape of the internal threads A and B are the same; the pitch and tooth shape of the external threads A and B are the same; the internal threads A are rotatably matched with the adjusting screw A; the internal threads B are rotatably matched with the adjusting screw B; the cross-sections of the ends of the adjusting screws A and B are the same, and both match the cross-sections of the through holes and the limit slots; The adjusting screw A is rotated from the end to the threaded section in sequence to fit with a fixing nut A and two anti-loosening nuts A; the end of the fixing nut A facing the node is provided with a fitting surface that matches the outer surface of the node, and the other end is provided with an external thread C that is identical to the external thread A; the end of the anti-loosening nut A near the node is provided with a sink hole; the inner wall of the large hole of the sink hole is provided with an internal thread C that rotates with the external thread C; the inner wall of the small hole of the sink hole is provided with an internal thread D that rotates with the threaded section of the adjusting screw A; the internal thread C of the other anti-loosening nut A rotates with the external thread A, and the internal thread D rotates with the threaded section of the adjusting screw A; Adjusting screw B, corresponding to adjusting screw A, is rotated in sequence from the end to the threaded section to fit with a fixing nut B and two anti-loosening nuts B; one end of fixing nut B is provided with the same fitting surface as fixing nut A, and the other end is provided with an external thread D which is the same as external thread B; the end of anti-loosening nut B near the node is provided with a sink hole which is the same as anti-loosening nut B; the inner wall of the large hole of the sink hole is provided with an internal thread E which is rotationally matched with external thread D; the inner wall of the small hole of the sink hole is provided with an internal thread F which is rotationally matched with the threaded section of adjusting screw B; the internal thread E of the other anti-loosening nut B is rotationally matched with the external thread B, and the internal thread D is rotationally matched with the threaded section of adjusting screw B; The middle part of the truss rod is provided with a locking groove; A flange is provided at the intersection of the inner and outer surfaces of the node; and a plurality of through holes are evenly distributed on the flange.

2. The adjustable truss node device according to claim 1, characterized in that: The large hole depth of the sinking hole is greater than the thread length of the external thread A and the external thread B.

3. The adjustable truss node device according to claim 1, characterized in that: The adjusting hole has rounded corners.

4. The adjustable truss node device according to claim 1, characterized in that: The cross section of the end of the adjusting screw rod A is oval.

5. The adjustable truss node device according to claim 1, characterized in that: The tooth shape of the internal thread is larger than that of the external thread.

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