CN114182818A - Coplanar rod type truss joint - Google Patents
Coplanar rod type truss joint Download PDFInfo
- Publication number
- CN114182818A CN114182818A CN202111575571.4A CN202111575571A CN114182818A CN 114182818 A CN114182818 A CN 114182818A CN 202111575571 A CN202111575571 A CN 202111575571A CN 114182818 A CN114182818 A CN 114182818A
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- Prior art keywords
- rod
- adjusting screw
- sleeve
- piece
- pieces
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B1/1903—Connecting nodes specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B1/1903—Connecting nodes specially adapted therefor
- E04B2001/1918—Connecting nodes specially adapted therefor with connecting nodes having flat radial connecting surfaces
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B2001/1957—Details of connections between nodes and struts
- E04B2001/196—Screw connections with axis parallel to the main axis of the strut
Abstract
A coplanar rod type truss node comprises an adjusting screw rod, a middle rod piece, two side rod pieces and a fixing nut; the adjusting screw rod is vertical to the main stress surface of the coplanar rod type truss node; the adjusting screw rod is sleeved with a middle rod piece, two side rod pieces and a fixing nut from inside to outside; the middle rod piece comprises a sleeve A and a straight rod which are connected; the axis of the straight rod is superposed with the main stress surface; the rod pieces on the two sides comprise a sleeve B and a bent rod; one end of the bent rod is connected with the sleeve B, the middle part of the bent rod is bent towards the middle rod piece, and the axis of the other end of the bent rod is superposed with the main stress surface; the fixed nuts are respectively in threaded connection with the adjusting screw rods on two sides to clamp the middle rod piece and the rod pieces on two sides; the sleeve A and the sleeve B are sleeved on the adjusting screw rod and can drive the middle rod piece and the two side rod pieces to axially move along the adjusting screw rod and rotate around the axis of the adjusting screw rod so as to reach proper positions and directions; fixing the fixing nut A; therefore, the more free orientation selection can be provided, and the deviation of the truss rod piece can be offset, so that the construction difficulty is reduced, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of steel structures, in particular to a coplanar rod type truss joint.
Background
The truss structure refers to a plane or space structure generally provided with triangular units and formed by straight rods. Under the action of load, the truss rod piece mainly bears axial tension or pressure, so that the strength of materials can be fully utilized, materials can be saved compared with a solid web beam when the span is large, the self weight is reduced, and the rigidity is increased, so that the truss rod piece is suitable for large-span bearing structures and high-rise structures, such as roof trusses, bridges, power transmission line towers, satellite launching towers, hydraulic gates, crane frames and the like. Compared with a solid-web steel beam, the steel truss is characterized in that a flange is replaced by a chord member and a web member is replaced by a web member, and the web member and the chord member are connected with each other at each node through a gusset plate (or other parts) by welding seams or other connections; sometimes the bars may be welded (or otherwise connected) directly to each other without the gusset plate. Thus, the bending moment when the whole plane truss is bent is expressed as the axial compression and tension of the upper chord and the lower chord, and the shearing force is expressed as the axial compression or tension of each web member. The engineering key points needing to be considered during the construction of the truss structure comprise a connecting method and a web member system; the steel truss may be welded, bolted or riveted with high strength. The web member system has a plurality of structures according to design requirements; what is closely related to the connection method and the web member system is the node design of the truss structure; the truss node structure in the prior art only has two types, namely a plate node and a spherical node; the node positions of the plate-type nodes and the spherical nodes are fixed positions, and the orientation of the rod pieces connected with the nodes is also fixed; in the construction process, once the truss rod piece has slight deviation, the truss structure cannot be connected; the truss structure is repaired with great difficulty, and the construction period is greatly delayed.
Disclosure of Invention
The invention aims to solve the problems and provides a coplanar rod type truss node.
The technical scheme of the invention is as follows: a coplanar rod type truss node comprises an adjusting screw rod, a middle rod piece, two side rod pieces and a fixing nut;
the adjusting screw rod is horizontally arranged, and two ends of the adjusting screw rod are connected with other parts of the truss structure; the adjusting screw rod is provided with a middle rod piece, two side rod pieces and a fixing nut which are sleeved on the middle to two sides respectively;
one middle rod piece comprises a sleeve A and a straight rod which are connected; the sleeve A is slidably sleeved on the adjusting screw rod; one end of the straight rod is perpendicular to the axis of the sleeve A and is connected with the sleeve A, and the other end of the straight rod is connected with other parts of the truss structure;
the two side rod pieces are provided with a plurality of rods, and comprise sleeves B and bent rods which are connected; the sleeve B is sleeved on the adjusting screw rod in a sliding manner; one end of the bent rod is perpendicular to the axis of the sleeve B and is connected with the sleeve B, the middle part of the bent rod is bent and transited towards the middle rod piece, and the axis of the other end of the bent rod and the axis of the middle rod piece are positioned on the same vertical plane and are connected with other parts of the truss structure;
the two fixing nuts are respectively in threaded connection with the adjusting screw rods on two sides to clamp the middle rod piece and the rod pieces on two sides.
Preferably, the middle rod piece and the ends of the two side rod pieces connected with other parts of the truss structure are provided with external threads.
Preferably, the middle part of the bent rod and the outer circumferential surface bent towards the middle rod piece are provided with reinforcing rib plates.
Preferably, the end face of the fixing nut, which faces the middle rod piece, is provided with fine small dental nails; the small tooth nails are distributed around the circumference of the axis of the fixed nut; the end surfaces of the two side rod pieces at the outermost side, which are far away from the middle rod piece, are provided with fine small teeth B; the small tooth nail and the small tooth B are buckled with each other.
Preferably, the end surface of the fixing nut, which is far away from the middle rod piece, is provided with a boss; the outer wall of the boss is provided with an external thread A; the coplanar rod type truss node is also provided with a locknut; one end of the locknut is in threaded connection with the adjusting screw rod, and the other end of the locknut is provided with an internal thread A which is in threaded connection with the external thread A.
Preferably, the thread length of the external thread A is smaller than the depth of the inner wall of the locknut where the internal thread A is located.
Preferably, the thread shape of the external thread A is smaller than that of the adjusting screw rod.
Preferably, the adjusting screw rod is further sleeved with a flat pad and an elastic pad; the flat pad or the elastic pad is respectively arranged between the middle rod piece and the two side rod pieces and between the two adjacent side rod pieces.
The invention has the beneficial effects that: the coplanar rod type truss node comprises an adjusting screw rod, a middle rod piece, two side rod pieces and a fixing nut; the adjusting screw rod is vertical to the main stress surface of the coplanar rod type truss node; the adjusting screw rod is sleeved with a middle rod piece, two side rod pieces and a fixing nut from inside to outside; the middle rod piece comprises a sleeve A and a straight rod which are connected; the axis of the straight rod is superposed with the main stress surface; the rod pieces on the two sides comprise a sleeve B and a bent rod; one end of the bent rod is connected with the sleeve B, the middle part of the bent rod is bent towards the middle rod piece, and the axis of the other end of the bent rod is superposed with the main stress surface; the fixed nuts are respectively in threaded connection with the adjusting screw rods on two sides to clamp the middle rod piece and the rod pieces on two sides; the sleeve A and the sleeve B are sleeved on the adjusting screw rod and can drive the middle rod piece and the two side rod pieces to axially move along the adjusting screw rod and rotate around the axis of the adjusting screw rod so as to reach proper positions and directions; fixing the fixing nut A; therefore, the more free orientation selection can be provided, and the deviation of the truss rod piece can be offset, so that the construction difficulty is reduced, and the construction efficiency is improved.
Drawings
Fig. 1 is a perspective view of a coplanar rod truss joint of the present invention;
FIG. 2 is an enlarged view I of FIG. 1;
FIG. 3 is an enlarged view II of FIG. 1;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is a sectional view A-A of FIG. 4;
FIG. 6 is a sectional view of the first embodiment taken in the direction of section B-B in FIG. 4;
FIG. 7 is a perspective view of the outermost two side rods;
FIG. 8 is an enlarged view of III of FIG. 7;
FIG. 9 is a sectional perspective view of the fixing nut and the locknut after being screwed in the first embodiment;
FIG. 10 is a perspective view of the springpad;
FIG. 11 is a sectional view of the second embodiment taken along the line B-B in FIG. 4;
FIG. 12 is a sectional perspective view of the fixing nut and the locknut in the second embodiment after being screwed;
in the figure: 1. the adjustable screw rod comprises an adjusting screw rod, 2 middle rod pieces, 21 sleeve I, 22 straight rods, 3 two side rod pieces, 31 sleeve B, 32 bent rods, 33 reinforcing rib plates, 34 reinforcing rib plates, 35 small tooth B, 4 fixing nuts, 41 small tooth A, 42 bosses, 421 external thread A, 5 locknuts, 51 internal thread A, 6 flat pads and 7 elastic pads.
Detailed Description
The first embodiment is as follows: referring to fig. 1-10, a coplanar rod type truss node includes an adjusting screw, a middle rod, two side rods, and a fixing nut;
the adjusting screw rod is horizontally arranged, and two ends of the adjusting screw rod are connected with other parts of the truss structure; the adjusting screw rod is provided with a middle rod piece, two side rod pieces and a fixing nut which are sleeved on the middle to two sides respectively; the adjusting screw rod is a bearing component of all coplanar rod type truss nodes;
one middle rod piece comprises a sleeve A and a straight rod which are connected; the sleeve A is slidably sleeved on the adjusting screw rod; one end of the straight rod is perpendicular to the axis of the sleeve A and is connected with the sleeve A, and the other end of the straight rod is connected with other parts of the truss structure; the middle rod piece is positioned in the middle of the coplanar rod type truss node; the middle of the coplanar rod type truss node is not a geometric center, namely the middle point position of the adjusting screw rod, but refers to a point of the truss structure on the coplanar rod type truss node connecting part, which mainly bears the force to penetrate through the adjusting screw rod; when the adjusting screw rod is arranged, the adjusting screw rod is axially vertical to the main bearing force, and the middle rod piece is overlapped with the main bearing force; therefore, the straight rod can better bear the main bearing force of the truss structure, and the whole truss structure is more stable; the sleeve A slides on the adjusting screw rod, so that the middle rod piece can find the middle position of the truss node defined above;
the two side rod pieces are provided with a plurality of rods, and comprise sleeves B and bent rods which are connected; the sleeve B is sleeved on the adjusting screw rod in a sliding manner; one end of the bent rod is perpendicular to the axis of the sleeve B and is connected with the sleeve B, the middle part of the bent rod is bent and transited towards the middle rod piece, and the axis of the other end of the bent rod and the axis of the middle rod piece are positioned on the same vertical plane and are connected with other parts of the truss structure; the actual installation positions of the two side rods on the adjusting screw rods are arranged on two sides of the middle rod, and the two side rods are sequentially arranged outwards from the middle rod, but the ends of the two side rods connected with other parts of the truss structure and the middle rod are on the same vertical plane; the vertical surface is the surface mainly bearing the force; therefore, the bent rod can transmit the main bearing force to the adjusting screw rod through the slow bending transition of the middle part, so that the coplanar rod type truss node can establish a stable connection relation with other parts of the truss structure; the sleeve B slides on the adjusting screw rod, so that the rod pieces on the two sides can find the position for realizing the state;
two fixing nuts are respectively in threaded connection with the adjusting screw rods on two sides to clamp the middle rod piece and the rod pieces on two sides; the fixing nuts are used for fixing the positions of the middle rod piece and the two side rod pieces which are well determined from the two sides, so that the connection relation between the middle rod piece and the two side rod pieces and other parts of the truss structure is stable; it is noted that the middle rod piece and the two side rod pieces can rotate around the adjusting screw rod; before the fixing nut acts, the middle rod piece and the two side rod pieces do not interfere with each other and can face any angle of the vertical surface; the coplanar rod type truss node undoubtedly has more choices of certain orientations when the connection relation is established among other parts of the truss structure, and constructors can select according to the field condition so as to offset the deviation of the truss rod piece for connection without repair, thereby reducing the construction difficulty and improving the construction efficiency.
The ends of the middle rod piece and the two side rod pieces, which are connected with other parts of the truss structure, are provided with external threads so as to establish a threaded connection relationship with other parts of the truss structure.
The middle part of the bent rod is provided with a reinforcing rib plate on the outer circumferential surface which is bent towards the middle rod piece, the mechanical strength of the bent part of the bent rod is reinforced, and the main bearing force can be transmitted to the adjusting screw rod through the bent part of the bent rod.
The end surface of the fixing nut facing the middle rod piece is provided with fine small dental nails; the small tooth nails are distributed around the circumference of the axis of the fixed nut; the end surfaces of the two side rod pieces at the outermost side, which are far away from the middle rod piece, are provided with fine small teeth B; the small tooth nails and the small tooth B are buckled with each other, so that the friction force between the fixing nut and the two side rod pieces on the outermost side is increased, and the orientation and the position of the middle rod piece and the two side rod pieces are prevented from changing; if the small tooth nails and the small tooth nails are not buckled, once the coplanar rod type truss nodes are subjected to vibration along the axial direction of the adjusting screw rod, the orientation of the middle rod piece and the two side rod pieces can change the orientation and the position while the gaps are generated due to the vibration.
The end surface of the fixing nut far away from the middle rod piece is provided with a boss; the outer wall of the boss is provided with an external thread A; the coplanar rod type truss node is also provided with a locknut; one end of the locknut is in threaded connection with the adjusting screw rod, and the other end of the locknut is provided with an internal thread A which is in threaded connection with the external thread A; when the fixed nut has a movement trend towards the anti-loose nut, the anti-loose nut pushes the fixed nut to counteract the movement trend by means of threaded connection established with the adjusting screw rod; when the fixed nut has a movement trend deviating from the locknut, the connection relationship established between the external thread A and the internal thread A can pull the fixed nut to counteract the movement trend; therefore, the movement trends of the fixing nut along two axial directions can be counteracted by the locknut, so that the position in the axial direction cannot be changed; the result of this is that the readjustment of the axial position of the screw rod by the middle and two side rods, determined by the fixing nuts, does not change either, and the entire coplanar rod truss joint is stably connected to the rest of the truss structure.
The length of the thread of the external thread A is smaller than the depth of the inner wall of the locknut where the internal thread A is located; therefore, the external thread A can be completely in threaded connection with the internal thread A, and the anti-loosening effect of the anti-loosening nut is better and stable.
The adjusting screw rod is also sleeved with a flat pad and an elastic pad; the flat pad or the elastic pad is respectively arranged between the middle rod piece and the two side rod pieces and between the two adjacent side rod pieces. The flat cushion has the function of separating the middle rod piece and the two side rod pieces, so that the middle rod piece and the two side rod pieces cannot interfere with each other, and the middle rod piece and the two side rod pieces can be fixed at proper positions; when the rod pieces at the two sides and the middle rod piece cannot be positioned at proper positions by the lengths of the sleeve A and the sleeve B, the number or the thickness of the flat pads for separation can be increased; the function of the elastic pad is to apply a certain pre-tightening force in the axial direction of the adjusting screw rod, so that the middle rod piece and the rod pieces at the two sides are always kept in a tightly-pushed state, and the orientation of the middle rod piece and the rod pieces at the two sides cannot be changed.
The working process of the embodiment:
in the preparation stage, a middle rod piece, two side rod pieces, a fixing nut and a locknut are correspondingly sleeved on an adjusting screw rod according to design requirements; according to the shapes of the sleeved middle rod piece and the sleeved two side rod pieces, a flat pad and an elastic pad are selectively sleeved between the middle rod piece and the two side rod pieces so as to ensure that the axes of the straight rod and the bent rod are on the same radial surface of the adjusting screw rod;
in the positioning stage, the two ends of the adjusting screw rod are connected with other parts of the truss structure, and the adjusting screw rod is horizontally arranged; the sleeve A is utilized to move the middle rod piece to a position on the adjusting screw rod, which corresponds to the position of the main bearing force; then adjusting the rod pieces on the two sides and the fixing nuts to proper positions in sequence; a plurality of gaps are reserved between the fixing nut and the two side rod pieces on the outermost side to be suitable positions of the fixing nut; according to design requirements, after the orientations of the middle rod piece and the rod pieces on the two sides are ensured to be correct, the fixing nuts are rotated to ensure the orientations and the positions of the middle rod piece and the rod pieces on the two sides;
and in the anti-loose screwing stage, the anti-loose nuts are respectively screwed from two sides, so that the complete threaded connection relation between the internal thread A and the external thread A is established, and the anti-loose of the coplanar rod type truss node is realized.
Example two: referring to the attached drawings 1-5, the attached drawings 7-8 and the attached drawings 10-12 in the specification, the second embodiment is basically the same as the first embodiment, and the description is omitted, except that the tooth form of the external thread nail is smaller than that of the adjusting screw rod; the adjusting screw rod is an important stressed part of a truss structure, and the mechanical strength of the adjusting screw rod can be ensured by the large-tooth-shaped thread; the external thread A is only used for generating a locking effect on the fixing nut and does not need large mechanical strength.
Claims (8)
1. A coplanar rod type truss node is characterized by comprising an adjusting screw rod, a middle rod piece, two side rod pieces and a fixing nut;
the adjusting screw rod is horizontally arranged, and two ends of the adjusting screw rod are connected with other parts of the truss structure; the adjusting screw rod is provided with a middle rod piece, two side rod pieces and a fixing nut which are sleeved on the middle to two sides respectively;
one middle rod piece comprises a sleeve A and a straight rod which are connected; the sleeve A is slidably sleeved on the adjusting screw rod; one end of the straight rod is perpendicular to the axis of the sleeve A and is connected with the sleeve A, and the other end of the straight rod is connected with other parts of the truss structure;
the two side rod pieces are provided with a plurality of rods, and comprise sleeves B and bent rods which are connected; the sleeve B is sleeved on the adjusting screw rod in a sliding manner; one end of the bent rod is perpendicular to the axis of the sleeve B and is connected with the sleeve B, the middle part of the bent rod is bent and transited towards the middle rod piece, and the axis of the other end of the bent rod and the axis of the middle rod piece are positioned on the same vertical plane and are connected with other parts of the truss structure;
the two fixing nuts are respectively in threaded connection with the adjusting screw rods on two sides to clamp the middle rod piece and the rod pieces on two sides.
2. The coplanar rod truss joint of claim 1, wherein: and external threads are arranged at the end parts of the middle rod piece and the two side rod pieces which are connected with other parts of the truss structure.
3. The coplanar rod truss joint of claim 1, wherein: and a reinforcing rib plate is arranged on the outer circumferential surface of the middle part of the bent rod, which is bent towards the middle rod piece.
4. The coplanar rod truss joint of claim 1, wherein: the end surface of the fixing nut facing the middle rod piece is provided with fine small dental nails; the small tooth nails are distributed around the circumference of the axis of the fixed nut; the end surfaces of the two side rod pieces at the outermost side, which are far away from the middle rod piece, are provided with fine small teeth B; the small tooth nail and the small tooth B are buckled with each other.
5. The coplanar rod truss joint of claim 1, wherein: the end surface of the fixing nut far away from the middle rod piece is provided with a boss; the outer wall of the boss is provided with an external thread A; the coplanar rod type truss node is also provided with a locknut; one end of the locknut is in threaded connection with the adjusting screw rod, and the other end of the locknut is provided with an internal thread A which is in threaded connection with the external thread A.
6. The coplanar rod truss joint of claim 5, wherein: the length of the thread of the external thread A is smaller than the depth of the inner wall of the locknut where the internal thread A is located.
7. The coplanar rod truss joint of claim 5, wherein: the tooth shape of the external thread A is smaller than that of the adjusting screw rod.
8. The coplanar rod truss joint of claim 1, wherein: the adjusting screw rod is also sleeved with a flat pad and an elastic pad; the flat pad or the elastic pad is respectively arranged between the middle rod piece and the two side rod pieces and between the two adjacent side rod pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111575571.4A CN114182818A (en) | 2021-12-22 | 2021-12-22 | Coplanar rod type truss joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111575571.4A CN114182818A (en) | 2021-12-22 | 2021-12-22 | Coplanar rod type truss joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114182818A true CN114182818A (en) | 2022-03-15 |
Family
ID=80605827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111575571.4A Pending CN114182818A (en) | 2021-12-22 | 2021-12-22 | Coplanar rod type truss joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114182818A (en) |
-
2021
- 2021-12-22 CN CN202111575571.4A patent/CN114182818A/en active Pending
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