Adjustable connection node for assembled truss structure

Abstract

The present invention discloses an adjustable connection node for an assembled truss structure, comprising a load-bearing frame and a double-type locking mechanism. The upper and lower sides of the right end of the load-bearing frame are both flipped and connected with a pallet frame. The double-type locking mechanism is fixedly mounted on the plate surface of the pallet frame and is used for the placement and locking of the truss body. The double-type locking method is used to achieve a reliable and stable connection and assist in the convenient disassembly and assembly of the truss body. The double-type locking mechanism is assisted by the pallet frame to form a free angle adjustment operation. The adjustable connection node for the assembled truss structure achieves free adjustment of the truss assembly angle, improves the freedom and flexibility of truss assembly, and makes the application range of the connection node wider. In addition, the double-type locking method achieves a reliable and stable connection in the truss assembly, optimizes the operation steps, solves the use demand of convenient disassembly and assembly of the truss, and improves work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field related to assembled trusses, and in particular to an adjustable connection node for an assembled truss structure. Background Art

[0002] The truss is a frame composed of a main pipe frame welded together, generally with a plane or spatial structure of triangular units. The truss is a lattice-type load-bearing component, in which the rods mainly bear tension or compression, play a material role, and reduce the weight of the structure;

[0003] Trusses can be used to assemble and build various types of frame structures, and their scope of application is very wide. For example, they are used in large-scale stage lighting equipment, art exhibition halls and sports stadiums. The assembly and construction method of trusses usually requires the use of connecting structures to combine and assemble the trusses.

[0004] After searching the invention patent with patent number CN106436901B, it is found that a truss connection structure is provided, including a connecting seat, a locking tongue and an insert. One end of the connecting seat is integrally connected to the fixing seat, and the other end is provided with a plug-in slot for connecting the insert. The truss fixing seat is clamped at both ends of the truss and welded to the truss. A pin clamping slot is also provided in the plug-in slot, and the lower ends of both sides of the matching insert are integrally connected to the pins. A spring is connected on one side of the plug-in slot close to the fixing seat, and the other end of the spring is connected to the locking tongue. Through holes are provided on both sides of the locking tongue and the connecting seat, and an open elastic pin can be inserted in the through hole. The side of the locking tongue close to the pin clamping slot is integrally connected to the locking block. The truss connection structure connects the trusses firmly and stably, and the installation and connection are convenient without the use of tools.

[0005] The truss connection nodes used in the above patents and prior art still have certain shortcomings, such as:

[0006] 1. In the connection structure of the above-mentioned patent, the connecting seat is connected to the truss through the fixing seat. The two trusses are close together and the two connecting seats are locked together by the insert. However, the above-mentioned truss connection method can only extend the truss and is set in an unadjustable state. It cannot assist in the free adjustment of the truss angle, which affects the application range of the truss assembly.

[0007] 2. Existing truss assembly and connection methods usually use bolts for direct fixing operations, and multiple bolts need to be tightened in sequence. This operation is relatively cumbersome, affecting the construction efficiency of truss assembly. In addition, relying solely on bolt connection, the locking connection method is not reliable and stable.

[0008] Therefore, we propose an adjustable connection node for a prefabricated truss structure to solve the above problems. Summary of the Invention

[0009] The purpose of the present invention is to provide an adjustable connection node for an assembled truss structure to solve the problem proposed in the above-mentioned background technology that the truss cannot be freely adjusted in angle, and the bolt locking connection method is not reliable and stable enough, and the disassembly and assembly operations are not convenient enough, which affects the construction efficiency.

[0010] To achieve the above-mentioned object, the present invention provides the following technical solution: an adjustable connection node for a prefabricated truss structure, comprising:

[0011] The carrier frame has upper and lower sides of the right end thereof turned over and connected to a supporting plate frame;

[0012] Also includes:

[0013] A double locking mechanism is fixedly mounted on the plate surface of the pallet frame, which is used for the placement and locking of the truss body. It performs a reliable and stable connection through a double locking method, and assists in realizing convenient disassembly and assembly of the truss body. The double locking mechanism forms a free angle adjustment operation with the assistance of the pallet frame.

[0014] Preferably, a first screw member is rotatably connected to the middle portion of the frame cavity of the carrier frame via a bearing-assisted method, a drive plate is slidably connected to the frame cavity of the carrier frame, and a middle pipe groove wall of the drive plate is threadedly connected to the first screw member;

[0015] Wherein, support plate frames are provided on both the upper and lower sides of the driving plate, and one end of the support plate frame is rotatably connected to the connecting block in the driving plate, and the other end of the support plate frame is rotatably connected to the plate body of the supporting plate frame.

[0016] Preferably, the upper and lower support plate frames of the driving plate are combined to form an "eight"-shaped structure, and the support plate frame, the bearing frame and the supporting plate frame are combined to form a triangular structure.

[0017] Preferably, the double locking mechanism comprises an outer shell frame, a lock column member and a lock block member, the outer shell frame is fixedly connected to the plate body of the support frame by bolts, and an integrated square shell portion is provided in the middle of the upper shell wall of the outer shell frame, and the lock column members are telescopically and slidably connected to the front, back, left and right corners of the outer shell frame;

[0018] The four corners of the square shell are telescopically and slidably connected with locking blocks, and a first spring is installed at the connection between the locking blocks and the square shell;

[0019] The square shell is clamped in the frame cavity of the truss body, and the main pipe frame and the locking column in the truss body are connected by plugging, and the main pipe frame and the locking block in the truss body are connected by snapping.

[0020] Preferably, a second screw member is rotatably connected to the middle of the housing cavity of the square housing portion through a bearing-assisted method, a main linkage block is slidably connected to the housing cavity of the square housing portion, and a pipe groove wall of the main linkage block is threadedly connected to the second screw member;

[0021] Wherein, the four side walls of the main linkage block are each provided with a second pushing block portion of an integrated structure.

[0022] Preferably, a first push block portion of an integrated structure is provided at the end of the locking block, and the inclined side wall of the first push block portion and the inclined side wall of the second push block portion are pressed and fitted against each other.

[0023] Preferably, a secondary linkage block is slidably connected to the cylindrical portion of the primary linkage block, and a second spring is installed at the connection between the secondary linkage block and the cylindrical portion of the primary linkage block;

[0024] Among them, the connecting block in the secondary linkage block is slidably connected to the inward end of the linkage plate frame through a pin, and the middle part of the linkage plate frame is rotatably connected to the shell cavity wall of the outer shell frame, and the outward end of the linkage plate frame is slidably connected to the pin in the lock column member.

[0025] Preferably, the four corners of the housing cavity in the outer shell frame are all provided with square bars of an integrated structure, and the two side walls of the upper section of the square bars are both provided with auxiliary grooves;

[0026] The square column and the locking column member are movably sleeved together, and both sides of the upper end of the locking column member are telescopically and slidably connected with blocking blocks, and a third spring is installed at the connection between the blocking block and the locking column member.

[0027] Preferably, the lower side of the inner end of the blocking block is provided with an inclined side wall, and the inclined wall in the blocking block is pressed and fitted with the inclined wall in the auxiliary groove, and the blocking block is connected to the tube cavity wall of the main tube frame in the truss body in a pressing and fitting manner.

[0028] Compared with the prior art, the present invention has the following advantages: the assembled truss structure uses adjustable connection nodes to achieve free adjustment of the truss assembly angle, thereby improving the freedom and flexibility of truss assembly. In addition, the dual locking method achieves a reliable and stable connection during truss assembly, optimizes the operation steps, and meets the demand for convenient assembly and disassembly of the truss.

[0029] 1. A pallet frame and a support frame are provided. Through the threaded connection between the first screw member and the drive plate, the drive plate drives the two support frames to flip in opposite directions, that is, drives the two pallet frames to flip in opposite directions. Through the adjustable structural setting, the assembly angle between the two trusses can be freely adjusted. Different from the traditional single vertical assembly method, it effectively improves the freedom and flexibility of truss assembly and makes the application range of this connection node wider;

[0030] Furthermore, after being folded, the support plate rack is stored in the slide groove of the carrier frame and the groove cavity of the support plate rack. When the two support plate racks are completely turned over and folded, they are parallel to the carrier frame. When the two support plate racks are completely turned over and unfolded, the two support plate racks are arranged in a vertical state, which satisfies the parallel assembly and vertical assembly between the two trusses and is suitable for the assembly method of the traditional truss.

[0031] Furthermore, the support plate frames are arranged on the driving plate in an equidistant state from front to back, and the support plate frames, the bearing frame and the supporting plate frame are combined to form a triangular structure. Through a reliable support arrangement, the purpose of stable connection after angle adjustment is met;

[0032] 2. A locking column and a locking block are provided. Through the mutual cooperation between the inclined wall in the auxiliary groove and the inclined wall in the blocking block, after the locking column moves downward, the blocking block is driven to slide out, and the locking column drives the blocking block to squeeze the main pipe frame in the truss body to lock it. Through the mutual cooperation between the second pushing block part and the first pushing block part, the locking block is driven to slide out and engage the main pipe frame in the truss body to lock it. Through the double locking method, a reliable and stable connection is achieved in the truss assembly, which avoids the loosening of the truss assembly and ensures the safety performance of the truss after assembly.

[0033] Furthermore, through the elastic support of the second spring, the main connecting block drives the secondary connecting block to slide synchronously. When the secondary connecting block slides, the connecting plate frame is used to drive the lock column part to slide down. After the secondary connecting block slides, it is restricted, and the main connecting block continues to slide. Through the cooperation between the second push block part and the first push block part, the lock block part is driven to slide out. Through the setting of the linkage structure, the synchronous operation of the sliding of the lock column part and the sliding of the lock block part is realized, the operation steps are optimized, the operation method is simple, the use requirements of convenient disassembly and assembly of the truss are solved, and the work efficiency of the truss assembly and construction is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the front three-dimensional structure of the present invention;

[0035] Figure 2 This is a bottom-up perspective structural diagram of the connection between the carrier frame and the pallet frame of the present invention;

[0036] Figure 3 This is a schematic diagram of the front cross-sectional three-dimensional structure of the connection between the carrier and the drive plate of the present invention;

[0037] Figure 4 This is a schematic diagram of the disassembled top view of the support frame and the double locking mechanism of the present invention;

[0038] Figure 5 It is a schematic diagram of the side cross-sectional three-dimensional structure of the connection between the truss body, the locking column member and the locking block member of the present invention;

[0039] Figure 6 This is a top view of the three-dimensional structure of the connection between the auxiliary linkage block and the linkage plate frame of the present invention;

[0040] Figure 7 It is a schematic diagram of the side cross-sectional three-dimensional structure of the connection between the square shell portion and the main linkage block of the present invention;

[0041] Figure 8 This is a schematic side view of the main linkage block and the auxiliary linkage block of the present invention;

[0042] Figure 9 This is a schematic diagram of the split top view of the locking column and the linkage plate frame of the present invention;

[0043] Figure 10 It is a schematic side view of the cross-sectional three-dimensional structure of the connection between the locking column member and the square column of the present invention.

[0044] In the figure: 1. load-bearing frame; 2. support plate frame; 3. double locking mechanism; 4. truss body; 5. first screw rod member; 6. driving plate; 7. support plate frame; 8. outer shell frame; 801. square shell portion; 9. lock column member; 10. lock block member; 1001. first push block portion; 11. first spring; 12. second screw rod member; 13. main linkage block; 1301. second push block portion; 14. secondary linkage block; 15. second spring; 16. linkage plate frame; 17. square column; 1701. auxiliary groove; 18. blocking block; 19. third spring. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] See also Figure 1-10 The present invention provides a technical solution: an adjustable connection node for an assembled truss structure, comprising a load-bearing frame 1 and a double locking mechanism 3.

[0047] When the assembled truss structure is in use, the double locking mechanism 3 is fixedly placed on the plate surface of the support frame 2 and is arranged in a parallel state. It is used for the placement and locking of the truss body 4, and it is reliably and stably connected through the double locking method, and assists in realizing the convenient disassembly and assembly of the truss body 4. Specifically, according to the attached Figure 1 、 Figure 4 and Figure 5As shown, the truss body 4 is an existing truss structure, which is provided with four main pipe frames in the front, rear, left and right directions. Since the square shell portion 801 is arranged in an integrated structure in the middle of the upper shell wall of the outer shell frame 8 and is arranged in a vertically upward protruding state, and since locking column members 9 are provided at the front, rear, left and right corners of the outer shell frame 8, the locking column members 9 are movably inserted through the upper shell wall of the outer shell frame 8 after being installed and are arranged in a vertically upward extending state, the truss body 4 is placed on the double locking mechanism 3, so that the square shell portion 801 is clamped in the frame cavity of the truss body 4, and the locking column members 9 are plugged and connected with the main pipe frames in the truss body 4, thereby completing the placement of the truss body 4;

[0048] According to the attached Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, the upper end of the second screw rod 12 is clamped and fixedly connected with a hexagonal bolt cap by bolts, wherein the hexagonal bolt cap movably penetrates the upper shell cavity wall of the square shell part 801 and protrudes outward. Since the upper rod body of the second screw rod 12 is fixedly clamped with a bearing, it is movably inserted into the middle shell cavity of the square shell part 801 after being installed, and its upper rod body together with the bearing is clamped on the shell cavity wall of the square shell part 801. By using an external wrench, the hexagonal bolt cap in the second screw rod 12 is screwed and rotated, so that the second screw rod 12 is assisted by the bearing to rotate in the middle of the shell cavity of the square shell part 801;

[0049] Since the cross section of the main linkage block 13 is arranged in a square structure, it is movably mounted in the housing cavity of the square shell portion 801 after being installed, and is positioned in the housing cavity of the square shell portion 801 in an active state. Moreover, since the main linkage block 13 is movably sleeved on the second screw member 12 after being installed, its tube groove wall is threadedly connected to the second screw member 12. When the second screw member 12 is driven to rotate, the main linkage block 13 slides upward in the housing cavity of the square shell portion 801.

[0050] Since a cylindrical portion of an integrated structure is vertically provided just below the main linkage block 13, wherein the lower end of the cylindrical portion is fixedly connected to an end cover by bolts, and since the secondary linkage block 14 is movably sleeved on the cylindrical portion in the main linkage block 13 after being placed, a second spring 15 is installed at the connection between the secondary linkage block 14 and the cylindrical portion in the main linkage block 13. After being placed, the second spring 15 is movably sleeved on the cylindrical portion in the main linkage block 13, one end of the second spring 15 is pressed against the pipe groove wall of the secondary linkage block 14, and the other end is pressed against the end cover of the cylindrical portion in the main linkage block 13. The secondary linkage block 14 is positioned on the cylindrical portion in the main linkage block 13 in an active state through the elastic support of the second spring 15. When the main linkage block 13 initially slides upward, it drives the secondary linkage block 14 to move synchronously.

[0051] Since the auxiliary linkage block 14 is provided with an integrated limit block at the front, rear, left and right corners, after being installed, the limit block is movably clamped in the middle of the shell cavity of the outer shell frame 8 and is positioned in the shell cavity of the outer shell frame 8 in an active state, the auxiliary linkage block 14 slides upward in the shell cavity of the outer shell frame 8 after being driven;

[0052] Since the four side walls of the secondary linkage block 14 are provided with connecting blocks of an integrated structure, wherein the connecting blocks are fixedly connected with pins by bolts, and since the linkage plate frame 16 is arranged in a "V"-shaped structure, the corner is rotatably connected with a shaft column, which is arranged to be movable on the shell cavity wall of the outer shell frame 8, and wherein the shaft column is inserted and fixedly connected to the shell cavity wall of the outer shell frame 8, the linkage plate frame 16 is arranged in a circular array with the center of the secondary linkage block 14 as the center of the circle, and then since the linkage plate frame 1 6 is provided with a slide groove at the inward end, which is arranged to be movably clamped on the connecting block in the secondary linkage block 14 after being placed, and the pin on the connecting block in the secondary linkage block 14 is movably inserted into the slide groove at the inward end of the linkage plate frame 16. When the secondary linkage block 14 slides upward, the connecting block in the secondary linkage block 14 slides in the inward end slide groove of the linkage plate frame 16 with the assistance of the pin, and the linkage plate frame 16 is moved to rotate and flip the middle part of the linkage plate frame 16 on the shell cavity wall of the outer shell frame 8;

[0053] Since both side column walls of the lower end of the lock column member 9 are fixed with vertical pins by bolts, and since each linkage plate frame 16 is arranged one-to-one with each lock column member 9, a slide groove is provided on the outward end of the linkage plate frame 16, which is arranged to be movably carded on the lock column member 9 toward the outward end, and the pin in the lock column member 9 is movably inserted into the slide groove toward the outward end of the linkage plate frame 16. When the linkage plate frame 16 is driven to flip, the pin in the lock column member 9 slides in the slide groove toward the outward end of the linkage plate frame 16, driving the lock column member 9 to move downward;

[0054] Since the shell cavity in the outer shell frame 8 is provided with an integrated structure of square bars 17 at the front, rear, left and right corners, the square bars 17 are arranged in a vertical upward state, and they extend outward through the upper shell wall of the outer shell frame 8. Since the lock column 9 is movably sleeved on the square bars 17 after being placed, when the lock column 9 is driven, it slides downward on the square bars 17, that is, the lock column 9 at the front, rear, left and right corners is driven to move synchronously;

[0055] Since auxiliary grooves 1701 are provided on both side walls of the upper section of the square column 17, the lower section is arranged in an inclined state, and the auxiliary grooves 1701 on both sides are arranged in opposite states, and since blocking blocks 18 are provided on both sides of the upper end of the lock column member 9, the cross section of the blocking block 18 is arranged in a "cross" shaped structure, after being placed, it is movably clamped in the column wall groove cavity of the lock column member 9, and its outer end is movably inserted through the column wall of the lock column member 9 to extend outward, and its inner end is movably inserted into the auxiliary groove 1701. Since the lower side of the inner end of the blocking block 18 is provided with an inclined wall, when the lock column member 9 slides downward, it drives the blocking block 18 to move synchronously, so that the inclined wall in the blocking block 18 and the inclined wall in the auxiliary groove 1701 are pressed and fit together, and through the cooperation between the two, the blocking block 18 is pushed to move;

[0056] Since a third spring 19 is installed at the connection between the blocking block 18 and the locking column member 9, the third spring 19 is symmetrically arranged about the horizontal central axis of the blocking block 18, one end of which is movably inserted in the spring compartment of the transverse block in the blocking block 18 and pressed against the compartment wall, and the other end of which is movably inserted in the spring compartment of the locking column member 9 and pressed against the compartment wall, the blocking block 18 is pushed and slides outward at the upper end of the locking column member 9, so that the sliding directions of the blocking blocks 18 on both sides are set in opposite directions, and the third spring 19 is squeezed and elastically deformed. When the blocking block 18 continues to slide downward with the locking column member 9, the blocking block 18 is pressed against the side wall of the square column 17, keeping the blocking block 18 in an extended state, and as the locking column member 9 moves downward, it is pressed against the wall of the tube cavity of the main pipe frame in the truss body 4, completing the extrusion locking of the truss body 4;

[0057] When the secondary linkage block 14 has completed its upward sliding movement, it is constrained and pressed against the wall of the square housing 801. At this time, the primary linkage block 13 is driven to continue sliding upward, and the cylindrical portion of the primary linkage block 13 slides on the secondary linkage block 14.

[0058] Since the four side walls of the main linkage block 13 are all provided with second push block parts 1301 of an integrated structure, and the second push block parts 1301 are arranged in a triangular structure, and since the locking block parts 10 are all provided at the front, back, left and right corners of the square shell part 801, the end of the locking block part 10 is provided with a first push block part 1001 of an integrated structure, and the first push block part 1001 is arranged in a triangular structure, and the inclined side wall of the first push block part 1001 is pressed and fitted with the inclined side wall of the second push block part 1301, when the main linkage block 13 is driven to slide upward, the second push block part 1301 and the first push block part 1001 cooperate with each other to push the locking block part 10 to move;

[0059] Since the cross section of the locking block 10 is a "T"-shaped structure, it is movably clamped on the shell cavity wall of the square shell part 801 after being placed, and the longitudinal block thereof movably penetrates the shell wall at the corner of the square shell part 801 and is arranged in a horizontally extended state. In addition, since a first spring 11 is installed at the connection between the locking block 10 and the square shell part 801, the first spring 11 is symmetrically arranged about the horizontal central axis of the locking block 10, one end of which is movably inserted in the spring compartment of the transverse block in the locking block 10 and pressed against the compartment wall, and the other end of which is movably inserted in the spring compartment of the square shell part 801 and pressed against the compartment wall, the locking block 10 is pushed and slides out on the square shell part 801, that is, the four locking blocks 10 in the front, back, left and right are driven to slide out synchronously, so that the locking block 10 is clamped and connected with the main pipe frame in the truss body 4, completing the clamping locking of the truss body 4;

[0060] The assembled truss structure uses an adjustable connection node. When adjusting the assembly angle, the angle can be freely adjusted by assisting the support frame 2. After the outer shell frame 8 is placed, it is parallel to the support frame 2 and fixedly connected to the plate body of the support frame 2 by bolts. Specifically, according to the attached Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the left end of the first screw rod 5 is clamped and fixedly connected with a hexagonal bolt cap by a bolt, wherein the hexagonal bolt cap movably penetrates the left frame cavity wall of the carrier frame 1 and protrudes outward. Since the left and right ends of the first screw rod 5 are fixedly clamped with bearings, it is movably inserted into the frame cavity of the carrier frame 1 after being installed, and its left and right ends together with the bearings are respectively clamped on the frame cavity walls on both sides of the carrier frame 1. By screwing and rotating the hexagonal bolt cap in the first screw rod 5 with the help of an external wrench, the first screw rod 5 is rotated in the middle of the frame cavity of the carrier frame 1 with the assistance of the bearings.

[0061] Since the carrier frame 1 is provided with slide grooves at equal intervals from the front to the back, wherein the slide grooves are arranged in a through state and are connected with its frame cavity, and since the upper side plate surface and the lower side plate surface of the driving plate 6 are provided with connecting blocks at equal intervals from the front to the back, wherein the connecting blocks are arranged in an integrated structure, and wherein each connecting block is arranged corresponding to each slide groove in the carrier frame 1, the driving plate 6 is movably clamped in the frame cavity of the carrier frame 1 after being placed, wherein the connecting block is movably inserted in the slide groove of the carrier frame 1, and since the middle part of the driving plate 6 is connected to the first screw rod 5 in a movably penetrating manner, wherein the wall of the pipe groove in the middle part is threadedly connected with the first screw rod 5, after the first screw rod 5 is driven to rotate, the driving plate 6 slides in the frame cavity of the carrier frame 1;

[0062] When the cam 1 is in the state of being moved, the cam 11 is in the state of being moved, and the cam 12 is in the state of being moved.

[0063] When the cam 2 is in the upright position, the cam 2 is rotated and the cam 2 is rotated, so that the cam 2 is rotated and the cam 2 is rotated.

[0064] This is the entire working process of the adjustable connection node for the assembled truss structure. Contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0065] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0066] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An adjustable connection node for a prefabricated truss structure, comprising: The carrier frame has upper and lower sides of the right end thereof turned over and connected to a supporting plate frame; It is characterized by further comprising: A double locking mechanism is fixedly mounted on the plate surface of the support frame and is used to lock the truss body. The double locking mechanism provides a reliable and stable connection and assists in convenient assembly and disassembly of the truss body. The double locking mechanism is assisted by the support frame to form a free angle adjustment operation. The double locking mechanism includes an outer shell frame, a lock column and a lock block. The outer shell frame is fixedly connected to the plate body of the support frame by bolts, and an integrated square shell portion is provided in the middle of the upper shell wall of the outer shell frame. The lock column is telescopically and slidably connected to the front, back, left and right corners of the outer shell frame. The four corners of the square shell are telescopically and slidably connected with locking blocks, and a first spring is installed at the connection between the locking blocks and the square shell; The square shell is clamped in the frame cavity of the truss body, and the main pipe frame and the locking column in the truss body are connected in a plug-in manner, and the main pipe frame and the locking block in the truss body are connected in a snap-fit manner; The middle part of the shell cavity of the square shell part is connected to the second screw rod through the auxiliary rotation of the bearing, the shell cavity of the square shell part is slidably connected to the main linkage block, and the pipe groove wall of the main linkage block is threadedly connected to the second screw rod; Wherein, the four side walls of the main linkage block are each provided with a second push block portion of an integrated structure; Wherein, the end of the locking block is provided with a first push block portion of an integrated structure, and the inclined side wall of the first push block portion is pressed and fitted with the inclined side wall of the second push block portion; Wherein, a secondary linkage block is slidably connected to the cylindrical portion of the main linkage block, and a second spring is installed at the connection between the secondary linkage block and the cylindrical portion of the main linkage block; The connecting block in the secondary linkage block is slidably connected to the inward end of the linkage plate frame through a pin, and the middle part of the linkage plate frame is rotatably connected to the shell cavity wall of the outer frame, and the outward end of the linkage plate frame is slidably connected to the pin in the lock column member; Among them, the four corners of the shell cavity in the outer shell frame are all provided with integrated square bars, and the two side walls of the upper section of the square bars are provided with auxiliary grooves; The square column and the locking column are movably sleeved together, and both sides of the upper end of the locking column are telescopically and slidably connected with a blocking block, and a third spring is installed at the connection between the blocking block and the locking column; Among them, the lower side of the inner end of the blocking block is provided with an inclined side wall, and the inclined wall in the blocking block is pressed and fitted with the inclined wall in the auxiliary groove, and the blocking block is connected to the tube cavity wall of the main tube frame in the truss body by pressing and fitting.

2. The adjustable connection node for a prefabricated truss structure according to claim 1, characterized in that: The middle part of the frame cavity of the carrier is connected to a first screw member through a bearing-assisted rotation, a drive plate is slidably connected in the frame cavity of the carrier, and the middle pipe groove wall of the drive plate is threadedly connected to the first screw member; Wherein, support plate frames are provided on both the upper and lower sides of the driving plate, and one end of the support plate frame is rotatably connected to the connecting block in the driving plate, and the other end of the support plate frame is rotatably connected to the plate body of the supporting plate frame.

3. The adjustable connection node for a prefabricated truss structure according to claim 2, characterized in that: The upper and lower support plate frames of the driving plate are combined to form an "eight"-shaped structure, and the support plate frame, the bearing frame and the supporting plate frame are combined to form a triangular structure.

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