Bidirectional tensioning connecting piece, connecting assembly and tool

Abstract

The utility model discloses a two-way tensioning connecting piece, a connecting assembly and a tool, which relate to the technical field of fabricated buildings and comprise a connecting structure of a double-end connecting rod and a connecting module and a connecting structure of the double-end connecting rod and a female joint in the connecting module. Two ends of the double-end connecting rod are respectively provided with external threads with opposite screwing directions, and the two ends of the double-end connecting rod are respectively connected with the female joints in the connecting module; a rotating part is arranged in the middle of the double-end connecting rod, the double-end connecting rod can rotate around a shaft through a tool capable of driving the rotating part, the length of threads, screwed into female joints, at the two ends of the double-end connecting rod can be increased, the female joints connected with the two ends of the double-end connecting rod are tensioned and fixed, and therefore the gap distance between the female joints at the two ends is reduced; and the connecting module connected with the female joint is tightly mounted in a seamless fit manner.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fabricated building, specifically to a bidirectional tension connecting piece, connecting assembly and tool. BACKGROUND

[0002] The fabricated building mode refers to the mode that a large number of on-site construction operations in the traditional building mode are transferred to the factory, such as floor, wall, stairs, balcony, railing and other components, which can be uniformly processed in the factory in advance and then transported to the site for assembly. For concrete components such as floor and wall or metal structural components such as railing, the gap between the installation surfaces needs to be reduced during installation, and the two connected components are as tightly and firmly installed as possible to ensure stable mechanical performance when the components bear pressure. In addition, the connected components will inevitably be affected by external forces during use, resulting in loosening and deformation, which will reduce the connection strength between the connected components and even cause the components to be virtually connected, affecting the tensile effect of the overall structure.

[0003] In the prior art, the grouting sleeve connection construction technology is widely used for the connection of steel bars between adjacent prefabricated components. The steel bar joints of adjacent prefabricated components are wrapped in the sleeve in the construction, cement mortar is injected into the sleeve to fill the sleeve gap, and the force transmission connection between the non-connected steel bars between adjacent prefabricated modules is realized by the wrapping effect of the cement mortar in the sleeve after solidification. However, the steel bars connected by the grouting sleeve technology do not have a pre-tightening internal force, and cannot avoid loosening and deformation. In addition, the prefabricated modules cannot be connected seamlessly, and the joint needs to be manually blocked. Furthermore, the grouting process is complex and requires a lot of construction time.

[0004] In the utility model with the patent publication number CN213773835U, a connection node technology for adjacent prefabricated modules is disclosed for the connection of prefabricated modules in fabricated buildings. The technology needs to open a groove on the surface of the prefabricated module and pass a connecting bolt through the groove to fix the prefabricated module plates that are not connected. However, the opening of the exposed groove will damage the uniformity of the exposed surface of the prefabricated module, and a subsequent grouting blocking step is needed to fill the groove. However, the tension of the bolt cannot be directly applied to the prefabricated module, and a connecting plate needs to be added to transmit the force and distribute the pressure. In addition, the joint of the prefabricated module in the horizontal direction cannot be eliminated by the vertical tension of the bolt, and the tight connection of the prefabricated module cannot be achieved.

[0005] Therefore, a reliable connection method is needed to directly act on the connected module, ensure a certain internal connection force between the components, resist deformation external force interference in the later use, and ensure the long-term reliability of the component connection. UTILITY MODEL CONTENTS

[0006] The utility model discloses a kind of two-way tensioning connecting pieces, which can reduce the gap between connecting components and maintain internal force to resist external force deformation.

[0007] In addition, the utility model further provides a special tool for locking operation during the two-way tensioning operation of the two-way tensioning connecting piece or the two-way tensioning connecting assembly.

[0008] The first invention of the utility model adopts the following scheme:

[0009] The two-way tensioning connecting piece includes a double-end connecting rod connected to the connecting module. The double-end connecting rod has opposite external threads at both ends, and both ends are threadedly connected to the connecting module. A rotating part is formed at the middle part of the double-end connecting rod. The rotating part is provided with a tooth part that can drive the double-end connecting rod to rotate around the shaft by using a tool. The driving part of the tool vertically extends into the tooth part of the double-end connecting rod. The operation tool rotates the double-end connecting rod, which can tighten the connecting modules at both ends.

[0010] As a further improvement of the utility model, the rotating part is formed by radially extending and expanding the middle part of the rod body of the double-end connecting rod. The tooth part is on the side plane of the rotating part. The tooth part is a circle of rotating teeth that can drive the double-end connecting rod to rotate around the shaft of the double-end connecting rod.

[0011] As a further improvement of the utility model, the tooth part is on the outer peripheral wall of the rotating part. The tooth part is a worm gear tooth that is distributed around the shaft of the double-end connecting rod.

[0012] As a further improvement of the utility model, the tooth part is a plurality of recessed driving tooth grooves formed on the outer peripheral wall of the rotating part. The driving tooth grooves are uniformly and spacedly distributed around the shaft of the double-end connecting rod.

[0013] The other invention of the utility model further provides a two-way tensioning connecting assembly, which includes a female connector and the two-way tensioning connecting piece. The female connector is arranged in the connecting module. The female connector includes a female connector shell, which is open at one end and has a cavity for accommodating the end part of the double-end connecting rod. An internal thread is formed on the inner wall of the cavity. One female connector shell is threadedly installed at each end of the double-end connecting rod. The tool is a locking tool, which can drive the double-end connecting rod to rotate around the shaft. The external threads at both ends of the double-end connecting rod are screwed into the matching internal threads in the respective female connector shells. The screwing length of the external threads at the end parts of the double-end connecting rod and the female connector shell increases with the increase of the number of rotation turns. The female connector shells at both ends are displaced and close to the rotating part of the double-end connecting rod.

[0014] As a further improvement of the utility model, still include the blocking table structure, the screw lock spare and the elastic part, the cavity mouth of female connector shell contracts inward and forms the blocking table structure, the screw lock spare is arranged in the cavity of female connector shell, is driven by the elastic part, has the tendency to move to the one side of blocking table structure, the screw lock spare is engaged with the outer thread of the end of double -end connecting rod, and the length of engagement is increased along with the rotation of double -end connecting rod, and the translation is close to the rotating part, until abuts on the blocking table structure, generates the tension of the axial direction to female connector shell.

[0015] As a further improvement of the utility model, the screw lock spare includes the conical lock piece, the outer wall of conical lock piece has the tapering surface that gradually increases from one end to another end, the blocking table structure is provided with the taper hole, and the plurality of pieces of conical lock piece are spliced into annular, and abut in the taper hole under the push of elastic part, and the taper hole taper hole tapering surface and the tapering surface of conical lock piece are consistent with the inclination angle, and mutually fit. The inside of conical lock piece has the tooth shape that is matched with the outer thread of the end of double -end connecting rod, and the end of double -end connecting rod can be easily inserted into the inside of tooth shape of conical lock piece, and conical lock piece is opened between each other, and is surrounded in the end of double -end connecting rod under the push of elastic part. The end of double -end connecting rod outer thread and the inside tooth shape of conical lock piece are engaged and cannot be pulled out, and the tapering surface of conical lock piece gradually shifts close to rotating part along with the increase of engagement length, until abuts and is fixed on taper hole tapering surface.

[0016] As a further improvement of the utility model, the screw lock spare includes the lock nut, and the outer peripheral wall of lock nut is provided with regular profile, can be connected to the inner cavity wall of female connector shell, slides up and down along the axial direction, and cannot rotate around the central axis. The end of lock nut is provided with horizontal nut plane, and the blocking table structure is provided with horizontal abutment surface, and lock nut is pushed by elastic part, and nut plane abuts on horizontal abutment surface. When the end of double -end connecting rod is inserted, lock nut is extruded by double -end connecting rod, overcomes the elastic force of elastic part, and moves along the axis to the one side of the inner cavity bottom wall of female connector shell. Lock nut cannot rotate when being connected by the inner cavity wall of female connector shell, and when double -end connecting rod rotates, lock nut can be engaged with the end thread of double -end connecting rod, and gradually moves to the one side of rotating part along with the continuous increase of engagement screwing length, until nut plane and horizontal abutment surface abut and are fixed.

[0017] As a further improvement of the utility model, the connecting module is provided with the channel that the driving part of locking tool can extend into, and the locking tool is provided with the slender rod body, can make the driving part of locking tool extend into the channel, and connect double -end connecting rod to provide rotating force.

[0018] As a further improvement of the utility model, the connecting part of double -end connecting rod and female connector is filled with condensation hardening material.

[0019] The utility model discloses still provide a kind of tool in the operation process of bidirectional tensioning connecting piece or bidirectional tensioning connecting component specially used for the bidirectional tensioning, the tool includes insertion part and driving part;The insertion part is cylindrical rod body, and the end of rod body is provided with driving part;The driving part is the driving tooth meshed with the tooth portion of rotating part;The driving tooth annular arrangement is in the periphery of driving part or set in the front end of driving part;When operating tool, rotate the driving tooth of driving part by rotating tool, and mesh the tooth portion of rotating part to drive double-end connecting rod rotation around shaft.

[0020] As a further improvement of the utility model, the driving part is a locking head set on the end of the rod, and the locking head is uniformly provided with uniformly spaced recess grooves around the center of the end of the rod;Or, the driving part is a helical tooth set on the outer peripheral wall of the end of the rod;Or, the driving part is a driving punch set on the end of the rod, which gradually expands and widens in the extension direction from the end of the rod to the rod.

[0021] The above-mentioned utility model has the following beneficial effects:

[0022] Firstly, the utility model can directly apply the fastening force of threaded connection to the connecting module, and can realize seamless connection after connection and tensioning, with an attractive appearance;Moreover, the threaded connection of the steel bars inside the prefabricated connecting module is firm and reliable, and can be used immediately without the need for secondary joint grouting and secondary sealing joint or groove operation.

[0023] Secondly, the double-end connecting rod is meshed with the threaded lock piece, so that the threaded lock piece abuts against the retaining table structure to generate axial tensioning force on the female connector shell, and the threaded lock piece and the retaining table structure abut against each other to maintain axial internal tensioning stress, which can realize the effect of check valve and anti-loosening, to ensure the long-term reliable existence of axial tensioning effect.

[0024] Thirdly, the double-end connecting rod rotating part structure of the utility model has multiple forms, which can be driven to rotate by different locking tools in cooperation with different installation scenes, with good universality. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the installation of the double-end connecting rod of the utility model;

[0026] Figure 2 It is a locking head structure diagram of the locking tool of the utility model;

[0027] Figure 3 It is a schematic diagram of the meshing of the locking head and the rotating tooth of the utility model;

[0028] Figure 4 It is a cross-sectional view of the installation of the worm gear type double-end connecting rod of the utility model;

[0029] Figure 5 Schematic view of the locking tool and the worm wheel tooth engagement of the utility model;

[0030] Figure 6 Schematic view of the driving punch and the driving tooth slot abutment of the utility model;

[0031] Figure 7 Schematic view of the driving punch and the driving tooth slot abutment of the utility model;

[0032] Figure 8 Enlarged schematic view of the rotating tooth of the utility model;

[0033] Figure 9 Enlarged schematic view of the worm wheel tooth of the utility model;

[0034] Figure 10 Enlarged schematic view of the driving tooth slot of the utility model;

[0035] Figure 11 Schematic view of the installation of the female connector shell fixedly arranged in the connecting module of the utility model;

[0036] Figure 12 Schematic view of the installation of the tapered locking piece and the tapered hole middle nut in the female connector shell of the utility model;

[0037] Figure 13 Schematic view of the installation of the locking nut and the planar middle nut in the female connector shell of the utility model;

[0038] Figure 14 Schematic view of the thread locking piece of the middle nut of the utility model;

[0039] Figure 15 Schematic view of the abutting surface of the thread locking piece and the blocking table structure of the utility model;

[0040] 1, female connector shell; 2, double-headed connecting rod; 3, locking tool; 4, connecting module; 101, middle nut; 1011, tapered hole middle nut; 1012, planar middle nut; 1013, tapered hole inclined surface; 1014, horizontal abutting surface; 102, tapered locking piece; 1021, tapered inclined surface; 103, locking nut; 1031, nut plane; 201, rotating part; 202, rotating tooth; 203, worm wheel tooth; 204, driving tooth slot; 301, locking head; 302, helical tooth; 303, driving punch; 310, handle; 311, rod body; 401, channel. DETAILED DESCRIPTION

[0041] In the description of the present application, it should be noted that the terms "outer side", "middle", "inner side", "bottom end" and the like indicate the orientation or positional relationship, which is based on the orientation or positional relationship shown in the specific drawings given, only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0042] Please refer to the accompanying Figure 1 -Appendix Figure 15

[0043] Specific embodiment one: a bidirectional tensioning connection assembly, characterized in that it comprises a female connector shell 1, a double-headed connecting rod 2, a locking tool 3 and a connecting module 4.

[0044] The female connector shell 1 is a cylindrical metal piece, one end of the female connector shell 1 is centrally drilled and internally provided with a hollow cylindrical cavity, the wall surface of the cylindrical cavity is provided with internal threads, the other end of the female connector shell 1 is centrally provided with a through hole, the intersection of the through hole and the internal thread forms a circular step structure, and the end portion outside the through hole is provided with a hexagonal nut structure for screwing and fixing.

[0045] The double-headed connecting rod 2 is a cylindrical metal piece, the middle part of the double-headed connecting rod 2 has a larger diameter than the two end rod bodies to form a rotating part 201, and the whole has a three-section stepped shaft appearance. The two ends of the double-headed connecting rod 2 are provided with external threads in opposite directions, as Figure 1 shown, the two ends of a single double-headed connecting rod 2 are both screwed with female connector shells 1 with matching thread directions. On one side of the cylindrical stepped shaft of the rotating part 201, a rotating tooth 202 is rotatably arranged around the axis of the double-headed connecting rod 2, and there are 18 rotating teeth 202 evenly distributed around the same interval.

[0046] The locking tool 3 is a specially designed screwdriver, which comprises a handle 310, a rod body 311 and a locking bit 301. One end of the handle 310 is provided with the rod body 311, and the end of the rod body 311 is provided with the locking bit 301. The locking bit 301 is uniformly provided with 6 recessed grooves around the end center. The tooth width of a single rotating tooth 202 gradually decreases from the outer circumference of the rotating part 201 to the axis, and the width of the recessed groove of the locking bit 301 gradually increases outward along the axis perpendicular direction from the end of the locking bit 301.

[0047] Locking principle: as Figure 11As shown, the female shell 1 is embedded in the wall or the board or other prefabricated component type connection module 4 in advance, or the steel bars in the wall or the board are welded in the through hole of the female shell 1, or the internal thread of the matching screw is added in the through hole of the female shell 1, and is tightened and fixed through the nut structure at the end. The two ends of the double-headed connecting rod 2 are respectively connected with the female shell 1 fixed with the component. The connecting module 4 is provided with a vertical channel 401 vertically leading to the rotating part 201, and the locking chuck 301 vertically extends into the rotating part 201 from the channel 401. As shown in Figure 3 As shown, the locking chuck 301 is engaged with the rotating tooth 202, the wider part of the recessed groove of the locking chuck 301 is matched and embedded with the wider part of the rotating tooth 202, the screwdriver is rotated clockwise, the double-headed connecting rod 2 is synchronously rotated clockwise, the screwing length of the two ends of the double-headed connecting rod 2 with the female shell 1 is synchronously increased with the increase of the rotation number, the two female shells 1 at the two ends are driven to move close to the rotating part 201 of the double-headed connecting rod 2, and then the two connecting modules 4 respectively connected with the female shells 1 at the two ends are driven to close, and the connection gap is reduced.

[0048] In particular, in order to match the channels 401 of different lengths provided on the connecting module 4 in actual use, the rod body 311 of the screwdriver is elongated, so that the tooth-shaped chuck of the locking chuck 301 can be connected and driven after extending into the channel 401.

[0049] Further, sealing operation is required during locking installation.

[0050] Before installation, a proper amount of structural glue or glass glue can be injected into the female joint, after the double-headed connecting rod 2 is inserted into the female joint and the connection is tightened by the locking tool 4, the structural glue or glass glue in the female joint can prevent loosening and corrosion of the threaded connection; or the channel 302 is first blocked by using a rubber, a wooden plug or other elastic filler, then a liquid such as water glass or cement slurry is injected into the internal components of the double-headed pre-tightening connector by using an injection device penetrating through the elastic filler of the channel 302, and the water glass or cement slurry can realize corrosion and loosening prevention of the internal components of the double-headed pre-tightening connector after hardening.

[0051] Specific embodiment two: on the basis of the specific embodiment one, as shown in Figures 4-5 The driving mode of the double-headed connecting rod is changed. The worm gear teeth 203 are arranged on the outer peripheral wall of the rotating part 201 and are distributed around the axis of the double-headed connecting rod 2, and the tooth shape of the worm gear teeth 203 is gradually thinned from the tooth root part to the tooth end part, as shown in Figure 9 The locking tool 3 is changed to the spiral teeth 302 spirally formed on the outer peripheral wall.

[0052] During locking, as shown in Figure 5As shown, the worm gear tooth 203 is engaged with the helical tooth 302, and the helical tooth 302 of the worm is rotated counterclockwise to drive the double-headed connecting rod 2 to rotate clockwise synchronously, and the female connector shell 1 at both ends is moved close to the rotating part 201 to reduce the relative gap between the connecting modules and realize the locking of the connecting module 4.

[0053] Specific embodiment three: on the basis of specific embodiment one, as shown in the figure, Figures 6-7 The driving mode of the double-headed connecting rod is changed. Seven driving tooth grooves 204 are formed on the outer peripheral wall of the rotating part 201, as shown in the figure, Figure 10 The seven driving tooth grooves 204 are uniformly and spacedly distributed around the axis of the double-headed connecting rod 2, the driving tooth groove 204 is recessed from the outer peripheral wall to the axis of the double-headed connecting rod 2, forming two connected vertical walls, the width of one side of the single driving tooth groove 204 is wider than the other side, and the two vertical walls are perpendicular to each other. The locking tool 3 is changed to a screwdriver with a driving punch 303 at the end, the driving punch 303 is as shown in the figure, Figure 7 The end of the driving punch 303 gradually expands and widens in the direction of the axis, and the end is a rectangular plane.

[0054] When locking, the shorter side of the rectangular plane of the driving punch 303 is aligned with the narrower vertical wall of the driving tooth groove 204, so that the driving punch 303 abuts on the vertical wall, as shown in the figure, Figure 6 An axial force is applied to the screwdriver, the axial force is transmitted to the driving tooth groove 204, a tangential driving force is generated on the rotating part 201 to drive the double-headed connecting rod 2 to rotate clockwise, and the female connector shell 1 at both ends is moved close to the rotating part 201 to reduce the relative gap between the connecting modules and realize the locking of the connecting module 4.

[0055] Specific embodiment four: on the basis of specific embodiment one to specific embodiment three, as shown in the figure, Figure 12 A threaded locking piece, a blocking table structure and an elastic piece are additionally provided in the female connector shell 1.

[0056] The blocking table structure at the outlet of the cavity of the female connector shell 1 can be provided as a middle nut 101, the threaded locking piece can be provided as a conical locking piece 102, the middle nut 101 is matched with the conical locking piece 102, and is provided as a conical middle nut 1011, and the elastic piece is provided as a supporting spring.

[0057] The outer peripheral wall of the conical middle nut 1011 is provided with external threads matched with the threads in the inner cavity of the female connector shell 1, and the middle part is provided with a through hole through which the end of the double-headed connecting rod 2 passes.

[0058] The conical locking piece 102 and the supporting spring are arranged in the inner cavity of the female connector shell 1, one end of the supporting spring abuts against the bottom wall of the inner cavity of the female connector shell 1, and the other end abuts against the conical locking piece 102, and the conical locking piece 102 is pushed to move to one side of the middle of the conical hole.

[0059] As shown in Figure 14 , the conical hole middle nut 1011 is provided with a conical counterbore at one end in the inner cavity of the female connector shell 1, the conical locking piece 102 has a conical inclined surface 1021 gradually increasing from one end to the other end, and the inner side has a thread tooth shape matched with the outer thread of the end of the double-headed connecting rod 2. Three identical conical locking pieces 102 are combined together to form an annular threaded hole structure and are embedded in the conical counterbore of the conical hole middle nut 1011. The outer threaded end of the double-headed connecting rod 2 is chamfered, and when the outer threaded end is inserted through the central through hole of the conical hole middle nut 1011, the three conical locking pieces 102 are inserted and lifted by the chamfered end of the double-headed connecting rod 2 and are expanded, and under the pushing of the supporting spring, the annular threaded hole structure is always maintained to surround the end of the double-headed connecting rod 2 with a certain mechanical gap to achieve threaded engagement clamping.

[0060] When locked, the outer thread of the end of the double-headed connecting rod 2 is continuously screwed into the annular threaded hole structure formed by the three conical locking pieces 102, the three conical locking pieces 102 are continuously moved and approached to the rotating part 201, the separation gap between the three conical locking pieces 102 is gradually eliminated, the conical inclined surface 1021 is closely abutted against the conical inclined surface 1013, and the conical locking piece 102 generates and maintains an axial tension with the double-headed connecting rod 2, thereby realizing stable threaded engagement connection, so as to realize seamless tension installation of the connected module 4 connected by the two female connector shells 1. Specific embodiment five:

[0062] As shown in Figure 13 , the conical hole middle nut 1011 is replaced by a flat middle nut 1012, and the conical locking piece 102 is replaced by a locking nut 103.

[0063] As shown in Figure 14 , the flat middle nut 1012 is provided with a horizontal abutting surface 1014 at one end in the inner cavity of the female connector shell 1, the locking nut 103 is a regular hexagonal nut, the end is provided with a nut flat surface 1031, the center is provided with a threaded hole matched with the end of the double-headed connecting rod 2, and the inner cavity of the female connector shell 1 is provided with a regular hexagonal cavity wall larger than the outer edge shape of the locking nut 103, and when the end of the double-headed connecting rod 2 is inserted through the central through hole of the flat middle nut 1012, the locking nut 103 is lifted by the end of the double-headed connecting rod 2, and under the pushing of the supporting spring, the end of the double-headed connecting rod 2 is always abutted and fitted.

[0064] When locked, the outer thread of the end of the double-end connecting rod 2 is continuously screwed into the center threaded hole of the locking nut 103 in rotation, the outer edge of the locking nut 103 is limited by the female connector shell 1 and cannot rotate freely, as the length of the thread of the double-end connecting rod 2 continuously increases, the locking nut 103 continuously moves towards the middle of the flat washer 1012 and approaches until abutting and fixing with the horizontal abutting surface 1014, the locking nut 103 generates and maintains axial tension with the double-end connecting rod 2, realizes stable threaded engagement connection, so as to realize seamless tension installation of the connecting module 4 connected by the two end female connector shells 1.

[0065] The above only describes the preferred embodiments of the present application, and is not intended to limit the purpose, and any modification, replacement, and variation within the spirit and principle of the design are within the protection scope of the present application.

Claims

1. A bidirectional tensioning connector, characterized in that: Includes a double-headed connecting rod (2) that is connected to the connecting module (4); The two ends of the double-ended connecting rod (2) are respectively provided with external threads of opposite directions, and both ends are threadedly connected to a connecting module (4). A rotating part (201) is provided at the middle position of the double-ended connecting rod (2). The rotating part (201) is provided with teeth that can drive the double-ended connecting rod (2) to rotate around the axis by a tool. The driving part of the tool extends vertically into the teeth of the double-ended connecting rod (2). By operating the tool to rotate the double-ended connecting rod (2), the connecting modules (4) at both ends can be tightened.

2. The bidirectional tensioning connector according to claim 1, characterized in that: The rotating part (201) is formed by radially extending and expanding the middle part of the double-headed connecting rod (2). The tooth is on one side plane of the rotating part (201). The tooth is a rotating tooth (202) that can drive the double-headed connecting rod (2) to rotate around the axis of the double-headed connecting rod (2).

3. The bidirectional tensioning connector according to claim 1, characterized in that: The teeth are located on the outer peripheral wall of the rotating part (201), and the teeth are worm gear teeth (203) distributed around the axis of the double-headed connecting rod (2).

4. The bidirectional tensioning connector according to claim 1, characterized in that: The teeth are a number of recessed drive tooth grooves (204) made on the outer peripheral wall of the rotating part (201), and the drive tooth grooves (204) are evenly spaced around the axis of the double-headed connecting rod (2).

5. A bidirectional tension connection assembly, characterized in that: Includes a female connector and a bidirectional tensioning connector as described in any one of claims 1-4; The female connector is set in the connection module (4). The female connector includes a female connector shell (1). The female connector shell (1) has an opening at one end and is provided with a cavity to accommodate the end of the double-ended connecting rod (2). The inner wall of the cavity is provided with an internal thread. The two ends of the double-ended connecting rod (2) are respectively threaded and fitted with a female connector shell (1). The tool is a locking tool (3). The locking tool (3) can drive the double-ended connecting rod (2) to rotate around the axis. The external threads at both ends of the double-ended connecting rod (2) are screwed into the matching internal threads in their respective female connector shells (1). The thread fit length between the external threads at the end of the double-ended connecting rod (2) and the female connector shell (1) increases continuously with the increase of the number of rotations. The female connector shells (1) at both ends move closer to the rotating part (201) of the double-ended connecting rod (2).

6. A bidirectional tensioning connection assembly according to claim 5, characterized in that: It also includes a baffle structure, a threaded locking element and an elastic element; the cavity opening of the female connector (1) shrinks inward to form a baffle structure, and the threaded locking element is set in the cavity of the female connector (1). Driven by the elastic element, it tends to move towards the baffle structure; the threaded locking element engages with the external thread at the end of the double-ended connecting rod (2), and the engagement length increases with the rotation of the double-ended connecting rod (2), and moves closer to the rotating part (201) until it abuts against the baffle structure, generating an axial tension force on the female connector (1).

7. A bidirectional tensioning connection assembly according to claim 6, characterized in that: The threaded locking component includes a tapered locking plate (102). The outer wall of the tapered locking plate (102) has a tapered inclined surface (1021) that gradually increases from one end to the other. A tapered countersunk hole is provided at the stop structure. Several tapered locking plates (102) are assembled into a ring and abut against the tapered countersunk hole under the push of the elastic element. The inclination angle of the tapered hole inclined surface (1013) and the tapered inclined surface (1021) of the tapered countersunk hole are consistent and fit together. The inner side of the tapered locking plate (102) has teeth that match the external thread at the end of the double-ended connecting rod (2). The end of the double-ended connecting rod (2) can be easily inserted into the inner side of the toothed conical locking plate (102). The conical locking plates (102) are expanded apart and surrounded by the end of the double-ended connecting rod (2) under the push of the elastic element. The external thread of the end of the double-ended connecting rod (2) is engaged with the inner toothed side of the conical locking plate (102) and cannot be pulled out. As the engagement length increases, the conical inclined surface (1021) of the conical locking plate (102) gradually moves closer to the rotating part (201) until it abuts and is fixed on the conical inclined surface (1013).

8. A bidirectional tension connection assembly according to claim 6, characterized in that: The threaded locking component includes a locking nut (103). The outer peripheral wall of the locking nut (103) has a regular surface, which can be engaged with the inner cavity wall of the female housing (1) and slide up and down along the axial direction, but cannot rotate around the central axis. The end of the locking nut (103) has a horizontal nut plane (1031), and the stop structure has a horizontal abutment surface (1014). The locking nut (103) is pushed by the elastic element, and the nut plane (1031) abuts against the horizontal abutment surface (1014). The end of the double-ended connecting rod (2) is inserted into the... When the locking nut (103) is squeezed by the double-ended connecting rod (2), it overcomes the elastic force of the elastic element and moves along the axis towards the bottom wall of the inner cavity of the female connector (1). The locking nut (103) is stuck by the inner cavity wall of the female connector (1) and cannot rotate. When the double-ended connecting rod (2) rotates, the locking nut (103) can engage with the end thread of the double-ended connecting rod (2) and gradually move towards the rotating part (201) as the engagement length increases until the nut plane (1031) abuts and is fixed with the horizontal abutting surface (1014).

9. A bidirectional tension connection assembly according to claim 5, characterized in that: The connecting module (4) is provided with a channel (401) into which the drive part of the locking tool (3) can be inserted. The locking tool (3) is made of a slender rod (311) which allows the drive part of the locking tool (3) to be inserted into the channel (401) and connected to the double-headed connecting rod (2) to provide rotational force.

10. A bidirectional tensioning connection assembly according to claim 5, characterized in that: The connection between the double-ended connecting rod (2) and the female connector is filled with a hardening material.

11. A tool for use in a bidirectional tensioning connector according to any one of claims 1-4, characterized in that: The tool includes an extension part and a drive part; the extension part is a cylindrical rod (311), and the end of the rod (311) is provided with a drive part; the drive part is a drive tooth that meshes with the tooth of the rotating part (201); the drive tooth is arranged in a ring around the periphery of the drive part or is provided at the front end of the drive part; when operating the tool, the drive tooth of the drive part is rotated by rotating the tool, and the meshing of the tooth of the rotating part (201) drives the double-headed connecting rod (2) to rotate around the axis.

12. A tool according to claim 11, characterized in that: The driving part is a locking bit (301) provided at the end of the rod (311), and the locking bit (301) is provided with uniformly spaced recessed grooves around the center of the end of the rod (311); or, the driving part is a helical tooth (302) provided on the outer peripheral wall of the end of the rod (311); or, the driving part is a driving punch (303) provided at the end of the rod (311), and the driving punch (303) gradually widens and expands from the end of the rod (311) in the direction of extension of the rod (311).

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