CN210827433U

CN210827433U - Connecting assembly and prefabricated part combination

Info

Publication number: CN210827433U
Application number: CN201920891267.2U
Authority: CN
Inventors: 周兆弟
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-06-23
Anticipated expiration: 2029-06-13

Abstract

The utility model discloses a coupling assembling and prefabricated component combination, this coupling assembling contains: a screw-on body; a nut sleeve axially opposed to the screw body and having an accommodating chamber with an opening facing the screw body; the two axial ends of the inserted rod are respectively provided with a screw joint and a reducing plug joint; the anti-release mechanism is covered in the accommodating cavity by the guide ring in a sealing way and is used for reversely clamping the reducing plug-in connector; the screw joint is fixedly connected with the screw body through threads, the pilot ring is provided with a through hole for the insertion rod to penetrate through, and the through hole comprises a pilot hole section with an axial length value L1 larger than an axial length value L2 of the reducing insertion joint. The connecting component and the prefabricated part combination fully play the guide function of the guide ring for guiding the insertion rod to pass through along the central axis of the guide ring by increasing the guide length of the guide ring, so that the central axis of the insertion rod and the central axis of the guide ring gradually approach to be overlapped under the condition that the insertion rod is not contacted with the anti-falling mechanism, and the end part of the insertion rod is prevented from knocking and turning over part of the anti-falling mechanism in the inserting process.

Description

Connecting assembly and prefabricated part combination

Technical Field

The invention relates to the field of building components, in particular to a connecting component and a prefabricated component combination.

Background

The precast concrete pile is a widely used pile foundation material in the building industry, is limited by production and transportation conditions, and the length of a single section of the precast concrete pile is often smaller than the design length requirement of the precast concrete pile, so that a plurality of precast concrete piles need to be axially connected together to achieve the overall length of the design requirement in the actual construction process. The traditional precast concrete pile connection mode is generally that the end plates of an upper section of precast concrete pile and a lower section of precast concrete pile are aligned and welded, the concrete method is that the end plates of the upper section of pipe pile and the lower section of pipe pile are aligned, after the verticality is adjusted, the upper section of pipe pile and the lower section of pipe pile are connected in an electric welding mode, the connection mode is greatly influenced by human factors and meteorological factors, and the requirements on the verticality and the connection quality of the pipe pile are high, so that the construction difficulty and the construction cost are high. In addition, the welding method does not connect the steel bars in the upper tubular pile and the lower tubular pile, so that the stress transmission effect between the upper tubular pile and the lower tubular pile is not strong, and the connection strength between the upper precast concrete pile and the lower precast concrete pile is not ideal.

In view of the above-mentioned conventional precast concrete pile connection method by aligned welding of end plates, the applicant previously provided a strong-pull fastening structure, as shown in fig. 14, which includes a middle nut 301 and a plug rod 302 inserted into the middle nut 301, wherein the middle nut 301 has a collar formed by a plurality of clamping pieces 303 at an end thereof, and when the plug rod 302 is inserted into the middle nut 301, the collar can clamp the plug rod 302 so that the plug rod 302 is in snap-fit with the middle nut 301, the clamping pieces 303 have at least one clamping tooth therein, the plug rod 302 has at least one tensioning step 3022 thereon, and the tensioning step 3022 can be in snap-fit with the clamping tooth so as to form a step-shaped fastening structure. The reducing plug 3021 of the plug rod 302 has a concave part 3023 matched with the shape of the collar, and the tensioning step 3022 is positioned on the outer wall of the concave part 3023. The tensioning step 3022 is annular, and the latch on the plurality of latches 303 encloses and forms an annular structure.

Compared with the traditional welding type precast pile connecting method, the strong pulling buckling structure omits a connecting end plate at the end part of the pile, so that the strong pulling buckling structure has the advantages of less metal consumption, high butt joint construction speed, high connecting strength and the like. But has the following disadvantages: since the above-mentioned strong-pulling buckling structure is usually to install the inserting rod 302 in the nut sleeve (not shown) at one end of the upper pile before completing the inserting, and the middle nut 301, the supporting ring 304, the clamping piece 303, the elastic piece 305, and other components are installed in the nut sleeve 306 at one end of the lower pile, since the precast concrete pile inevitably has a certain inclination of the pile end face and/or positioning error of the nut sleeve and/or axial misalignment of the upper and lower precast concrete piles, in order to ensure that a plurality of strong-pulling buckling structures between the upper and lower precast concrete piles can complete the inserting, a radial gap is required to be left between the inner hole 3011 of the middle nut 301 and the middle section of the inserting rod 302 to adjust the above-mentioned error, which cannot avoid the situation that the central axis of the inserting rod 302 inclines or deviates relative to the central axis of the middle nut at the earlier stage of contacting the clamping piece 303, under the condition, the reducing plug 3021 collides and turns over part of the clamping pieces 303 on the support ring 304 with a small probability, and the turned part of the clamping pieces 303 fall down to the bottom of the inner cavity 3061 of the nut sleeve 306, so that only part of the clamping pieces 303 can play a role of reversely clamping and stopping the plug-in rod 302, and the connection strength of the upper precast concrete pile and the lower precast concrete pile cannot meet the requirement of the design standard. Although the above-mentioned situation is a small probability event, it is not allowed to occur for the construction industry where the safety performance requirements are extremely high.

Disclosure of Invention

The invention aims to solve the problem that the insertion failure is caused by the fact that an insertion rod is easy to knock down a release-preventing mechanism in the assembling process of the existing mechanical joint for the concrete prefabricated part, and ensure the success rate of insertion and the integral connection strength.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

a connection assembly, comprising: the anti-drop bolt comprises a bolt body, a nut sleeve, an inserted bar, a guide ring and an anti-drop mechanism, wherein the nut sleeve is axially opposite to the bolt body; the two axial ends of the inserted rod are respectively provided with a screw joint and a reducing plug joint; the anti-release mechanism is covered in the nut sleeve by the guide ring in a sealing way and is used for reversely clamping the reducing plug-in connector; the screw joint is fixedly connected with the screw body through threads, the guide ring is provided with a through hole for the insertion rod to penetrate through, and the through hole comprises a guide hole section with an axial length value L1 larger than an axial length value L2 of the reducing insertion joint, so that the central axis of the insertion rod and the central axis A of the guide ring gradually approach to each other in the penetrating process until the central axis A of the insertion rod and the central axis A of the guide ring are approximately coincided.

In the above-mentioned connection assembly, the axial length value L1 of the pilot hole section is greater than the minimum inner bore diameter value d of the pilot hole section; and/or the axial length value L2 of the reducing plug is larger than or equal to the maximum outer diameter D of the reducing plug.

In the connecting assembly, in the direction from the screw connector to the nut sleeve, the inner aperture of the pilot hole section is gradually reduced, and an included angle α with the angle value of 0.O 1-5 degrees is formed between the inner wall profile bus B of the pilot hole section and the central axis A of the pilot ring.

In the connecting assembly, the screw joint and the reducing plug joint are connected by the rod body, the rod body and the reducing plug joint are both in a rotating body shape, the reducing plug joint comprises a first reducing section with gradually increasing outer diameter and a second reducing section with gradually decreasing outer diameter in the direction from the screw joint body to the nut sleeve, an included angle theta with the angle value of 0.01-5 degrees is formed between the shortest straight line C from the connection position of the first reducing section and the second reducing section to the outer peripheral wall of the rod body and the central axis E of the rod body, and the angle value of the included angle theta is smaller than or equal to the angle value of the included angle α.

In the above-described connection assembly, the angle value of the included angle α is preferably 0.5 ° to 1.5 °.

In the connecting assembly, the axial length value L1 of the pilot hole section is 1.05 to 3 times of the axial length value L2 of the reducing plug; preferably, the axial length L1 of the pilot hole section is 1.15 to 1.5 times the minimum inner bore diameter d of the pilot hole section.

In the connecting assembly, the two axial ends of the pilot ring are respectively divided into a first end and a second end according to the sequence of the penetration of the inserted rods during assembly; the through hole is also provided with a conical restraining hole section which is positioned at the second end of the pilot ring and is connected with the pilot hole section, the inner aperture of the conical restraining hole section is gradually increased in the direction from the first end to the second end, and the conical restraining hole section can at least partially accommodate a slip-off prevention mechanism for reversely clamping the inserted link.

In the connecting assembly, the outer wall of the pilot ring is provided with an external thread extending from the second end to the first end, the second end of the pilot ring is provided with more than two grooves at intervals around the central axis, and the axial length of each groove is greater than or equal to that of the conical restraining hole section.

In the above-mentioned connecting assembly, the first end of the pilot ring is formed with a first torque applying portion for facilitating screwing.

In the above-mentioned coupling assembly, the disengagement preventing mechanism includes an annular locking body and an elastic element which is arranged in the nut sleeve and pushes the annular locking body towards the direction of the guide ring; the annular clamping body is provided with more than two arc-shaped clamping blocks which can be sequentially connected end to form a central through hole in a combined surrounding mode, the second reducing section penetrates through the central through hole and is spread out of the annular clamping body, and the arc-shaped clamping blocks are reset and gathered at the position of the first reducing section along the conical restraining hole section under the pushing action of the elastic element to reversely clamp the reducing plugging head.

In foretell coupling assembling, cyclic annular stops the body and is a whole, and the internal perisporium that cyclic annular stopped the body has seted up two at least radial slots around the axis, when the inserted bar exerted axial thrust and/or kept away from the radial thrust of axis to the one end of cyclic annular body that stops, cyclic annular stops the body and splits into two above independent arc fixture blocks in the radial slot department of at least partial quantity, the second reducing section runs through behind the cyclic annular body that stops of splitting, each arc fixture block resets along toper restraint hole section under elastic element's the thrust action and gathers together in first reducing section position with reverse card stop reducing bayonet joint.

In the above-mentioned connecting assembly, on any cross section of the arc-shaped fixture block, the outer arc center O1 of the arc-shaped fixture block is located between the inner arc F and the inner arc center O2, so that the wall thickness of the arc-shaped fixture block decreases progressively from the middle to the two circumferential ends, and the shortest linear distance L3 from the outer arc center O1 to the inner arc center O2 is greater than or equal to the middle wall thickness of the arc-shaped fixture block; or, a chamfer or a radius is formed between one circumferential end face or two end faces of the arc-shaped fixture block and the inner wall face.

In the connecting assembly, on the longitudinal section of the maximum wall thickness position of the arc-shaped fixture block, the ratio of the width value W of the bottom edge of the arc-shaped fixture block to the height value H of the arc-shaped fixture block is greater than 0.65; preferably, on the longitudinal section of the maximum wall thickness of the arc-shaped fixture block, the ratio of the width value W of the bottom edge of the arc-shaped fixture block to the height value H of the arc-shaped fixture block is greater than 0.7.

In the connecting assembly, a first break angle lambda 1 is formed on an outer contour bus of the arc-shaped clamping block, a second break angle lambda 2 is formed on an inner contour bus of the arc-shaped clamping block, the first break angle lambda 1 is positioned obliquely below the second break angle lambda 2 or the first break angle lambda 1 is positioned at the same height position of the second break angle lambda 2, the distance from the second break angle lambda 2 to the bottom of the arc-shaped clamping block is greater than or equal to the distance from the second break angle lambda 2 to the top of the arc-shaped clamping block, and the angle values of the first break angle lambda 1 and the second break angle lambda 2 are both greater than 90 degrees.

In the above-mentioned connection assembly, the length of the rod body of the inserted rod is greater than or equal to the axial length value L1 of the pilot hole section so that the reducing plug of the inserted rod can pass through the pilot hole section as a whole.

In the above-mentioned connecting assembly, the outer peripheral wall of the first reducing section and the outer peripheral wall of the rod body are in smooth transition, and/or the first reducing section is formed with at least one axial blocking surface along the axial direction at intervals.

In the above-described connecting assembly, one or both axial ends of the insert rod have a center hole.

In the above-mentioned connecting assembly, the rod body of the insertion rod is formed with a second torque applying portion facilitating screwing.

In the above-mentioned connecting assembly, the rod body of the inserted rod is provided with an axial positioning part near the screw joint, and/or the rod body comprises a screw section, and the top of the guide ring is supported with a fastening nut adapted to the screw section.

In the above-mentioned connection assembly, the value of the angle β 2 between the inner contour generatrix K of the annular clamping body and the central axis Y is smaller than or equal to the value of the angle γ between the first variable diameter section contour generatrix I and the central axis E of the plunger;

in the connecting component, a plurality of teeth are formed on the inner wall of the annular clamping body along the axial direction, the tooth tips of the teeth are sequentially far away from the central axis Y of the annular clamping body in the direction from the screw body to the nut sleeve, the profile bus M connecting the tooth tips is a straight line, and the included angle β 3 between the profile bus M and the central axis Y of the annular clamping body is smaller than or equal to the included angle gamma between the profile bus I of the first variable-diameter section and the central axis E of the inserted bar.

The connecting component provided by the invention fully exerts the guide function of the guide ring for guiding the inserted rod to pass through along the central axis of the guide ring by increasing the guide length of the guide ring under the condition that the radial clearance between the inserted rod and the guide ring is not influenced, so that the inserted rod can gradually reduce the radial clearance between the inserted rod and the guide ring to be ignored and gradually approach to be coincident with the central axis of the guide ring under the condition that the reducing inserted head of the inserted rod completely enters the positive hole section and is not contacted with the anti-disengaging mechanism in the process of passing through the guide ring, thereby avoiding the inserting failure caused by knocking over part of the anti-disengaging mechanism at the end part of the inserted rod in the inserting process and ensuring the inserting success rate and the integral connecting strength.

In addition, the invention also provides a prefabricated part combination, which comprises more than two prefabricated parts which are sequentially butted in one direction, wherein when two adjacent prefabricated parts are spliced, the end part of one prefabricated part is butted with the end part of the other prefabricated part by any one of the connecting components;

in the prefabricated part combination, each prefabricated part comprises a concrete body internally provided with a rigid framework, and the rigid framework is provided with a plurality of stress ribs distributed in an array; and at least part of the stress ribs in one prefabricated component are fixedly connected with a screw joint body at one end part, and/or at least part of the stress ribs in the other prefabricated component are fixedly connected with a nut sleeve at the other end part.

The prefabricated part combination provided by the invention has the technical effect same as that of the connecting component due to the adoption of the connecting component provided by the invention, and has the advantages of simplicity and high efficiency in assembly, high connecting strength and high reliability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is an exploded perspective view of a connecting member according to a first embodiment of the invention.

Fig. 2 is a schematic view of an internal structure of the connecting component in an assembled state according to the first embodiment of the present invention.

Fig. 3 is an axial cross-sectional view of a pilot ring in accordance with an embodiment of the present invention.

Fig. 4 is a front view of an insert rod in accordance with an embodiment of the present invention.

FIG. 5 is an axial cross-sectional view of an annular stop body according to a first embodiment of the present invention.

Fig. 6 is an axial cross-sectional view of another pilot ring in accordance with one embodiment of the present invention.

Fig. 7 is an axial sectional view showing an internal structure of another connecting assembly in an assembled state according to the first embodiment of the present invention.

FIG. 8 is a perspective view of the annular locking body according to the second embodiment of the present invention.

Fig. 9 is a cross-sectional view of an arc-shaped latch according to a third embodiment of the present invention.

Fig. 10 is an axial cross-sectional view of the annular locking body in the fourth embodiment of the present invention.

FIG. 11 is an axial cross-sectional view of an annular locking body in a fifth embodiment of the present invention.

Fig. 12 is an internal structural view of a connecting assembly in an assembled state in the sixth embodiment of the present invention.

Fig. 13 is a sectional view of a prefabricated part combination in the seventh embodiment of the present invention.

Fig. 14 is a schematic diagram of a strong-pull fastening structure in the background art.

In the drawings:

100. a connecting assembly;

200. combining prefabricated parts; 201. a concrete body; 202. a stress rib;

1. a screw-on body; 11. a heading clamping table;

2. a nut socket; 21. a heading clamping table; 22. an accommodating chamber;

3. inserting a rod; 31. a screw joint; 32. a reducing plug-in connector; 321. a first variable diameter section; 322. a second variable diameter section; 323. an axial stop surface; 33. a rod body; 331. a second torque applying section; 34. a central bore; 35. an axial positioning part; 36. a shaft shoulder; 4. a drop-out prevention mechanism; 41. an annular locking body; 411. an arc-shaped fixture block; 412. a radial groove; 413. biting teeth; 42. an elastic element; 43. A ring support;

5. a pilot ring; 5a, a first end; 5b, a second end; 51. a through hole; 511. a pilot hole section; 512. a conical restricted orifice section; 513. a pilot hole segment; 52. grooving; 53. a first torque application portion;

6. fastening a nut;

301. a middle nut; 3011. an inner bore; 302. inserting a rod; 3021. a reducing plug-in connector; 3022. tensioning the step; 3023. a recessed portion; 303. a card; 304. a supporting ring; 305. an elastic member; 306. a nut socket.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.

In this specification, terms such as "upper, lower, inner, and outer" are established based on positional relationships shown in the drawings, and the corresponding positional relationships may vary depending on the drawings, and therefore, the terms are not to be construed as absolutely limiting the scope of protection; moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

< example one >

As shown in fig. 1 and 2, the present embodiment provides a connecting assembly 100 for a building, wherein the connecting assembly 100 includes: the bolt body 1, the nut sleeve 2, the insert rod 3, the guide ring 5 and the anti-drop mechanism 4 are preferably of a revolving body structure, but it should be noted that the bolt body 1 and the nut sleeve 2 can be installed and fixed in a concrete prefabricated part in an embedded manner, and the outer peripheral wall of the bolt body 1 and the outer peripheral wall of the nut sleeve 2 are provided with at least one straight surface for circumferential positioning, so as to prevent the bolt body 1 and the nut sleeve 2 from axially rotating in a concrete prefabricated part preparation state or a concrete prefabricated part use state. Of course, in the case of concrete cast-in-place construction, the connecting assembly 100 for building provided by the present invention may also be used to butt-joint and fix a stressed bar (such as a steel bar, a round steel bar, a screw-thread steel, a PC steel bar, etc., wherein the PC steel bar refers to a steel bar for prestressed concrete).

Specifically, as shown in fig. 1, 2, and 4, the screw body 1 is preferably a nut having an upset abutment 11 at one end. The nut sleeve 2 is axially opposite to the screw joint body 1 and is provided with an accommodating cavity 22 with an opening facing the screw joint body 1, the nut sleeve 2 is also provided with an upset head clamping table 21, two axial ends of the insertion rod 3 respectively form a screw joint 31 and a reducing insertion joint 32, the screw joint 31 and the reducing insertion joint 32 are connected by a rod body 33, and the rod body 33 and the reducing insertion joint 32 are both in a rotating body shape. The screw joint 31 is fixed to the screw body 1 by screw connection. The reducing plug 32 of the plug rod 3 can be axially inserted into the accommodating cavity 22, and the anti-release mechanism 4 reversely blocks the reducing plug 32 in the accommodating cavity 22. The retaining mechanism 4 is covered in the accommodating cavity 22 of the nut sleeve 2 by the guide ring 5.

As shown in fig. 1 to 4, the guiding ring 5 has a through hole 51 through which the insert rod 3 passes, and the through hole 51 includes a guiding hole segment 511 whose axial length value L1 is greater than the axial length value L2 of the reducer plug 32, so that the central axis E of the insert rod 3 and the central axis a of the guiding ring 5 gradually approach to each other until they are approximately overlapped.

As shown in fig. 2 to 4, under the condition that the radial gap between the insert rod 3 and the pilot hole segment 511 is not changed, a larger pilot length has a better pilot effect, in order to ensure the pilot effect of the pilot hole segment 511, the pilot ring 5 needs to have a minimum reasonable axial length, the axial length value L1 of the pilot hole segment 511 is greater than the minimum inner bore diameter value D of the pilot hole segment 511, and the axial length value L2 of the reducer plug 32 is greater than or equal to the maximum outer diameter D of the reducer plug 32. In the invention, the axial length value L1 of the pilot hole segment 511 is 1.05 to 3 times of the axial length value L2 of the reducing plug-in connector 32, and certainly, in the range of the ratio, the smaller the ratio that the axial length value L1 of the pilot hole segment 511 is the axial length value L2 of the reducing plug-in connector 32 is, the smaller the axial lengths of the plug-in rod 3 and the pilot ring 5 are, although the pilot effect is weak, the metal consumption of the plug-in rod 3 and the pilot ring 5 can be reduced, and the material cost and the manufacturing cost are reduced; correspondingly, in the range of the ratio, the larger the ratio of the axial length value L1 of the pilot hole section 511 to the axial length value L2 of the reducing plug-in connector 32 is, the larger the axial lengths of the plug rod 3 and the pilot ring 5 are, and although the metal consumption of the plug rod 3 and the pilot ring 5 is increased, the material cost and the manufacturing cost are increased, the pilot effect is stronger.

Therefore, as shown in fig. 2 to 4, under the condition of comprehensively considering the manufacturing accuracy and the design and use requirements of the precast concrete component, in order to take account of the pilot effect and the cost factor, in the connection assembly 100 provided in this embodiment, the axial length value L1 of the pilot hole segment 511 is preferably 1.1 to 1.8 times the axial length value L2 of the reducer plug 32, and the axial length value L1 of the pilot hole segment 511 is further preferably 1.2 to 1.5 times the axial length value L2 of the reducer plug 32.

Also, as shown in fig. 2 to 4, in the connection assembly 100 of the present invention, in order to avoid the high material cost and manufacturing cost of the connection assembly 100 due to the excessive volume of the pilot ring 5 and the nut socket 2, the axial length L1 of the pilot hole segment 511 is 1.15 times to 1.5 times the minimum inner bore diameter d of the pilot hole segment 511, i.e., the pilot ring 5 is designed to be in an elongated tubular shape.

As shown in fig. 2 to 4, because the threaded connector 1 and/or the nut sleeve 2 have positioning accuracy errors during the preparation and molding process of the precast concrete members, and it is not guaranteed that the two precast concrete members are completely aligned in the butt joint process of the precast concrete members, in order to ensure that the multiple sets of connection assemblies 100 of the precast concrete members can be effectively butted, in the present embodiment, in the direction from the threaded connector 1 to the nut sleeve 2, the inner bore diameter of the pilot hole section 511 is gradually reduced, i.e., the end through which the insert rod 3 passes first has a large radial position adjustment gap, and an included angle α with an angle value of 0.o 1-5 ° is formed between the inner wall profile bus B of the pilot hole section 511 and the central axis a of the pilot ring 5, of course, in the present embodiment, in order to reduce the radial gap between the insert rod 3 and the pilot ring 5, the pilot ring 5 has good guiding and centering effects, and the angle value of α is preferably 0.5-1.5 °.

As shown in fig. 4, in the insert rod 3 provided in this embodiment, in order to reduce the self weight of the insert rod 3 and reduce the processing difficulty of the insert rod 3 in the turning manufacturing process, one end or both ends of the insert rod 3 in the axial direction have a central hole 34; the central hole 34 may be a regular polygonal hole, and the insert rod 3 and the bolt 1 may be screwed and fixed by a tool such as an allen key. Of course, in addition to the center hole 34, in order to facilitate the screwing of the insert rod 3 to the screw body 1 during the assembly process, the rod body 33 of the insert rod 3 may be formed with a second torque applying portion 331 for facilitating the screwing.

As shown in fig. 2 to 4, in the direction from the screw body 1 to the nut socket 2, the reducer spigot 32 includes a first reducer section 321 whose outer diameter is gradually increased and a second reducer section 322 whose outer diameter is gradually decreased; the axial length of the rod body 33 of the inserted rod 3 is greater than or equal to the axial length of the pilot hole section 511 so that the reducing spigot 32 of the inserted rod 3 can wholly pass through the pilot hole section 511.

As shown in fig. 2 to 4, in order to further improve the guiding effect of the guiding ring 5, the shape of the inserted rod 3 needs to be substantially adapted to the shape of the guiding hole section 511, so as to reduce the radial clearance between the inserted rod 3 and the hole wall of the guiding hole section 511 and the inclination degree therebetween, an included angle θ with an angle value of 0.01 to 5 ° is formed between a shortest straight line C from the connection between the first reducing section 321 and the second reducing section 322 and the outer peripheral wall of the rod body 33 and the central axis E of the rod body 33, and the angle value of the included angle θ is smaller than or equal to the angle value of the included angle α, so that the guiding effect of the guiding ring 5 can be exerted when the outer peripheral wall of the rod body 33 just contacts the guiding hole section 511.

As shown in fig. 2 to 4, in the present embodiment, the axial two ends of the guiding ring 5 are respectively divided into the first end 5a and the second end 5b according to the sequence of the insertion rod 3 passing through in the assembly process. The through hole 51 further has a conical restriction hole section 512 located at the second end 5b of the pilot ring 5 and connected to the pilot hole section 511, the inner diameter of the conical restriction hole section 512 gradually increases in the direction from the first end 5a to the second end 5b, and the conical restriction hole section 512 can at least partially accommodate the anti-release mechanism 4 for reversely clamping the plunger 3.

As shown in fig. 2 to 4, in order to improve the smoothness of the insertion rod 3 penetrating through the pilot ring 5, the through hole 51 further has a pilot hole section 513, the pilot hole section 513 and the conical restriction hole section 512 are respectively disposed at both ends of the pilot hole section 511, and the pilot hole section 513 is a conical hole or a trumpet-shaped hole whose inner diameter decreases in the direction from the first end 5a to the second end 5b, and functions to guide the reducer plug 32 of the insertion rod 3 into the pilot hole section 511 in the case of manufacturing accuracy errors or assembly errors. In order to improve the smoothness of the insertion rod 3 penetrating through the guide ring 5 and avoid the insertion interference caused by the shaft shoulder 36 between the first reducing section 321 and the rod body 33, the outer peripheral wall of the first reducing section 321 and the outer peripheral wall of the rod body 33 are in smooth transition.

As shown in fig. 2 and 3, it is preferable that the outer wall of the pilot ring 5 is formed with an external thread extending from the second end 5b to the first end 5a, and the pilot ring 5 is screwed and fixed to the nut socket 2. In order to enable the pilot ring 5 to be screwed into the nut socket 2 by using a power tool or a hand tool, the first end 5a of the pilot ring 5 is formed with a first torque applying portion 53 for facilitating screwing, and the first torque applying portion 53 may be an inner regular polygonal hole or an outer regular polygonal end peripheral surface, or a cross groove or a straight groove or a spline provided on an end surface.

As shown in fig. 1 and 2, the disengagement preventing mechanism 4 includes an annular locking body 41 and an elastic member 42 which is built in the nut socket 2 and presses the annular locking body 41 in the direction of the guide ring 5; the elastic element 42 is provided with a ring support 43 which is sleeved or embedded at one end and can bear the annular clamping body 41, the ring support 43 is provided with a circular ring and a flange positioned at the top of the circular ring, and the structure design can prevent the card from falling due to the deviation or overlarge inclination of the ring support 43 relative to the elastic element 42.

As shown in fig. 1, 2, and 4, in the present embodiment, the annular locking body 41 is a split structure, specifically, the annular locking body 41 has more than two arc-shaped locking blocks 411 that can be sequentially connected end to form a central through hole 51 in a combined and surrounding manner, after the second reducing section 322 penetrates through the central through hole 51 and is spread out from the annular locking body 41, each arc-shaped locking block 411 is restored and gathered at the first reducing section 321 along the tapered constraining hole section 512 under the pushing action of the elastic element 42 to reversely lock the reducing bayonet 32.

As shown in fig. 1 and 5, in this embodiment, in order to increase the contact area between the arc-shaped latch 411 and the ring holder 43 and improve the stability of the arc-shaped latch 411, and avoid the arc-shaped latch 411 from tipping in the direction of the central axis Y when the reducing bayonet connector 32 contacts the arc-shaped latch 411, on the longitudinal section of the maximum wall thickness of the arc-shaped latch 411, the ratio between the width W of the bottom edge of the arc-shaped latch 411 and the height h of the arc-shaped latch 411 is greater than 0.65; on the longitudinal section of the maximum wall thickness of the arc-shaped fixture block 411, the ratio between the width W of the bottom edge of the arc-shaped fixture block 411 and the height H of the arc-shaped fixture block 411 is preferably greater than 0.7.

As shown in fig. 4 and 5, in order to improve the locking strength between the arc-shaped latch 411 and the first reducing section 321, at least one axial blocking surface 323 is formed on the first reducing section 321 at intervals along the axial direction, and the axial blocking surface 323 can abut against the bottom edge of the arc-shaped latch 411.

As shown in fig. 2, 4 and 5, an included angle β 2 is formed between the inner contour line K of the annular locking body 41 and the central axis Y, and the included angle β 2 is smaller than or equal to the included angle γ between the contour line I of the first variable diameter section 321 and the central axis E of the plunger 3.

If the angle value of the included angle β 2 is smaller than the angle value γ between the contour generatrix I of the first reducing section 321 and the central axis E of the inserted link 3, the engaging force between the lower part of the annular locking body 41 and the first reducing section 321 is larger, the engaging force between the upper part of the annular locking body 41 and the first reducing section 321 is relatively smaller, the extrusion force-bearing surface between the lower part of the annular locking body 41 and the first reducing section 321 is smaller, and the requirements on the material properties (such as hardness) of the annular locking body 41 and the inserted link 3 are higher to ensure the pull-out resistance.

If the angle value of the included angle β 2 is equal to the angle value γ between the contour generatrix I of the first reducing section 321 and the central axis E of the inserted link 3, the engaging force between the annular locking body 41 and the first reducing section 321 along the axial direction is relatively uniform, the respective extrusion stress surfaces of the annular locking body 41 and the first reducing section 321 are relatively large, the extrusion inching deformation is relatively small, the engaging effect between each other is good, and the large axial pulling resistance can be borne.

As shown in fig. 6, in the connecting assembly 100 provided by the present invention, the second end 5b of the pilot ring 5 may further have two or more grooves 52 spaced around the central axis a, and the axial length of the groove 52 is greater than or equal to the axial length of the conical restraining hole section 512; when the connection assembly 100 bears an axial drawing force, the reducing plug 32 drives the arc fixture block 411 to press the conical restriction hole section 512, so that the pilot ring 5 can be partially radially expanded to improve the thread connection strength with the nut sleeve 2.

As shown in fig. 7, in order to ensure that the screwing length of the screw joint 31 to the screw body 1 is fixed, the screwing strength of the screw body 1 and the insert rod 3 is improved, and the axial positioning error is reduced to ensure that the insert rod 3 has a sufficient length to penetrate through the pilot ring 5. In this embodiment, the rod body 33 of the insert rod 3 is provided with the axial positioning portion 35 near the screw joint 31, and after the screw joint 31 is screwed with the screw joint body 1 in place, the axial positioning portion 35 abuts against the end of the screw joint body 1 or the end face of the concrete prefabricated part, so that the axial assembling position precision between the screw joint 31 and the screw joint body 1 is ensured.

Under the basic condition that the radial clearance between the inserted link 3 and the guide ring 5 is not affected, the connecting assembly 100 provided in this embodiment sufficiently exerts the guide function that the guide ring 5 guides the inserted link 3 to pass through along the central axis a of the guide ring 5 by increasing the guide length of the guide ring 5, so that in the process that the inserted link 3 passes through the guide ring 5, under the condition that the variable-diameter inserting head 32 of the inserted link 3 completely enters the guide hole section 511 and does not contact the arc-shaped fixture block 411 yet, the inserted link 3 can gradually reduce the radial clearance between the inserted link 3 and the guide ring 5 to be ignored, the central axis E of the inserted link and the central axis a of the guide ring 5 gradually approach to be approximately overlapped, thereby avoiding the inserting failure caused by the fact that the lower end of the inserted link 3 collides and turns over the arc-shaped fixture block 411 in the inserting process, and ensuring the inserting success rate and the overall connecting strength.

< example two >

In the present embodiment, the same portions as those in the first embodiment are given the same reference numerals, and the same description is omitted.

As shown in fig. 8, relative to the first embodiment, the connection assembly 100 provided in the present embodiment further has the following structure: the annular locking body 41 is an integral body, at least two radial grooves 412 are formed in the inner peripheral wall of the annular locking body 41 around the central axis, when the inserted rod 3 applies axial pushing force to one end of the annular locking body 41 and/or radial pushing force far away from the central axis, the annular locking body 41 is split into more than two independent arc-shaped locking blocks 411 at least part of the radial grooves 412, after the second diameter-changing section 322 penetrates through the split annular locking body 41, each arc-shaped locking block 411 is reset and gathered at the position of the first diameter-changing section 321 along the conical constraint hole section 512 under the pushing action of the elastic element 42 to reversely lock the reducing plugging head 32.

Compared with the annular clamping body 41 with the split structure provided in the first embodiment, in the connection assembly 100 provided in this embodiment, each arc-shaped clamping block 411 is made into an integral annular clamping body 41, such a mechanism enables the annular clamping body 41 to be stably erected on the ring holder 43, the center of gravity is stable, when the insertion rod 3 applies an axial abutting force and/or a radial abutting force away from the central axis to one end (i.e., the top end in the state shown in fig. 8) of the annular clamping body 41, the annular clamping body 41 is split into more than two independent arc-shaped clamping blocks 411 moving radially outward at the radial groove 412, and the second diameter-changing section 322 of the insertion rod 3 can be prevented from being knocked over or knocking over the arc-shaped clamping blocks 411, so as to ensure the plugging success rate and reliability of the connection assembly 100.

< example three >

As shown in fig. 9, in the connection assembly 100 according to the first embodiment, in any cross section of the arc-shaped fixture block 411, the outer arc center O1 of the arc-shaped fixture block 411 is located between the inner arc F and the inner arc center O2, so that the wall thickness of the arc-shaped fixture block 411 decreases from the middle to the two circumferential ends, and the shortest straight distance L3 from the outer arc center O1 to the inner arc center O2 is greater than or equal to the middle wall thickness of the arc-shaped fixture block 411; when the inner arc F and the outer arc of the arc-shaped fixture block 411 are designed to be non-concentric, the radius F of the inner arc can be properly increased.

In this embodiment, in order to ensure that the arc-shaped fixture block 411 effectively and reliably reversely stops the first reducing section 321, the radius of the minimum inner circular arc F of the arc-shaped fixture block 411 is greater than or equal to the minimum outer diameter of the first reducing section 321.

Compared with the first embodiment, the connection assembly 100 provided in this embodiment can reasonably enlarge the inner arc radius of the arc-shaped fixture block 411 under the condition of controlling the wall thickness of the arc-shaped fixture block 411, can prevent both circumferential end portions of the arc-shaped fixture block 411 from interfering with the smooth penetration of the insertion rod 3 due to the fact that the inner arc radius is too small, prevent the arc-shaped fixture block 411 from toppling over, prevent the arc-shaped fixture block from falling into the accommodating cavity 22 of the nut sleeve 2, enable the inner wall and the second end surface of the arc-shaped fixture block 411 to abut against any axial position of the first reducing section 321 through the maximized contact area, prevent the arc-shaped fixture block 411 and the first reducing section 321 from being pulled off due to the contact area when the axial pulling force is borne, and;

of course, in order to achieve the above effects, the interference between the circumferential two ends of the inner wall of the arc-shaped fixture 411 is avoided, and one or two end surfaces of the arc-shaped fixture 411 in the circumferential direction are chamfered or rounded.

< example four >

As shown in fig. 10, with respect to the first embodiment, the connection assembly 100 of the present embodiment further has a structure that an outer contour generatrix of the arc-shaped latch 411 is formed with a first folding angle λ 1, an inner contour generatrix of the arc-shaped latch 411 is formed with a second folding angle λ 2, the first folding angle λ 1 is located obliquely below the second folding angle λ 2 or the first folding angle λ 1 is located at a same height position of the second folding angle λ 2, a distance from the second folding angle λ 2 to a bottom of the arc-shaped latch 411 is greater than or equal to a distance from the second folding angle λ 2 to a top of the arc-shaped latch 411, an angle value of the first folding angle λ 1 and an angle value of the second folding angle λ 2 are both greater than 90 °, and preferably, an angle value of an included angle β 1 between a straight line G connecting two ends of the inner contour generatrix of the annular latching body 41 and the central axis Y is less than or equal to an angle value of a central axis γ between the contour.

For arc fixture block 411 that embodiment a provided, the center of gravity of connecting subassembly 100 that this embodiment provided is through adjusting arc fixture block 411 for arc fixture block 411's center of gravity reduces and keep away from arc fixture block 411's inner wall as far as possible, can strengthen arc fixture block 411's uprightness nature, further avoids toppling over at inserted bar 3 grafting in-process because of arc fixture block 411 and leads to pegging graft the failure.

< example five >

As shown in fig. 11, compared to the first embodiment, the connection assembly 100 of the present embodiment further has a structure that a plurality of teeth 413 are formed on the inner wall of the annular locking body 41 along the axial direction, the tips of the teeth 413 are sequentially away from the central axis Y of the annular locking body 41 in the direction from the screw body 1 to the nut sleeve 2, the profile generatrix M connecting the tips is a straight line, an included angle β 3 is formed between the profile generatrix M and the central axis Y of the annular locking body 41, and the included angle β 3 is smaller than or equal to the included angle γ between the profile generatrix I of the first diameter-changing section 321 and the central axis E of the insert rod 3.

If the angle β 3 is smaller than the angle γ between the profile generatrix I of the first reducing section 321 and the central axis E of the plunger 3, the engaging force between the teeth 413 at the lower part of the annular locking body 41 and the first reducing section 321 is larger, while the engaging force between the teeth 413 at the upper part of the annular locking body 41 and the first reducing section 321 is relatively smaller, i.e. only part of the teeth 413 acts as the engaging force, which requires higher material properties (e.g. hardness) for the annular locking body 41 and the plunger 3.

If the angle value of the included angle β 3 is equal to the angle value of the included angle γ between the profile generatrix I of the first reducing section 321 and the central axis E of the inserted link 3, the engaging force of each engaging tooth 413 and the first reducing section 321 is relatively uniform, the engaging force of each engaging tooth 413 is exerted, the engaging effect between each engaging tooth 413 is good, and a relatively large axial pull-out resistance can be borne.

Compared with the smooth inner wall surface of the annular locking body 41 in the first embodiment, in the connection assembly 100 provided by the present embodiment, the engaging force between the inner wall of the annular locking body 41 and the first reducing section 321 is increased by providing the engaging teeth 413 on the inner wall of the annular locking body 41, so that the axial pull-out resistance of the connection assembly 100 is improved.

< example six >

As shown in fig. 12, relative to the first embodiment, the connection assembly 100 provided in the present embodiment further has the following structure: the rod body 33 of the inserted rod 3 comprises a screw section 33, the screw section 33 and the screw joint 31 are preferably of the same thread structure, and the top of the guide ring 5 supports a fastening nut 6 matched with the screw section 33; through twisting the fastening nut 6 soon, can carry out the locking with the high position of inserted bar 3, ensure that the high interval between two concrete prefabricated component that wait to assemble the butt joint is fixed, and then combine the resistance to compression effect on the basis that realizes the resistance to plucking effect, be convenient for construction operations such as cast-in-place.

For the smooth body of rod 33 that embodiment one provided, the coupling assembling 100 that this embodiment provided has better compressive property, be applicable to between the prefabricated wall body in the assembled building, between prefabricated floor and the prefabricated wall body, and prefabricated post and prefabricated wall body, prefabricated wall body and precast beam etc. reliable resistance to compression, shearing, tensile connection performance requirement each other.

< example seven >

In this embodiment, the same portions as those in the first to sixth embodiments are given the same reference numerals, and the same description is omitted.

As shown in fig. 13, the present embodiment further provides a prefabricated part combination, which includes more than two concrete prefabricated parts that are sequentially butted in a direction, and is characterized in that when two adjacent concrete prefabricated parts are spliced, an end of one concrete prefabricated part is butted with an end of another concrete prefabricated part by the connecting assembly 100 according to any one of the first embodiment to the sixth embodiment;

in this embodiment, each precast concrete component includes a concrete body 201 having a rigid framework embedded therein, and the rigid framework has a plurality of stress bars 202 distributed in an array, that is, the precast concrete component shown in this embodiment is a reinforced concrete precast component. And the stress bar can be any one of round steel, screw-thread steel, PC steel bar, glass steel bar and the like which meets the strength requirement of buildings.

And at least part of the number of the stress bars 202 in one precast concrete component is fixedly connected with a screw joint body 1 at one end part, and at least part of the number of the stress bars in the other precast concrete component is fixedly connected with a nut sleeve 2 at the other end part.

The peripheral walls of the screw joint body 1 and the nut sleeve 2 are respectively provided with a non-circular rotation stop surface.

In a use environment with corrosiveness to metals, such as acid and alkali, in order to avoid rusting of the stress ribs 202 of the two prefabricated parts and the connecting assembly 100 due to exposure, the end faces of the prefabricated parts are coated with epoxy resin, the nut sleeve 2 is filled with the epoxy resin, and the epoxy resin in the nut sleeve 2 can further improve the anti-pulling performance of the connecting assembly 100.

The prefabricated member in this embodiment may be any one of a concrete precast concrete pile, a concrete precast pile cap, a concrete precast slab, a concrete precast wall, a concrete precast column, a concrete precast beam, a concrete precast balcony, a concrete precast bay window, a concrete precast stair, a concrete precast elevator shaft, a concrete precast roof or a concrete precast terrace.

The prefabricated component combination that this embodiment provided has the advantage that assembly efficiency is high, joint strength is reliable, practical long-lived, the durability is good.

The technical principles of the present invention have been described above in connection with specific embodiments, but it should be noted that the above descriptions are only for the purpose of explaining the principles of the present invention, and should not be construed as specifically limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will appreciate that other embodiments of the present invention or equivalents thereof without inventive step, are also within the scope of the present invention.

Claims

1. A connection assembly, comprising:

a screw-on body;

a nut sleeve axially opposed to the screw body and having an accommodating chamber with an opening facing the screw body;

the two axial ends of the inserted rod are respectively provided with a screw joint and a reducing plug joint; and

the anti-release mechanism is covered in the accommodating cavity by a guide ring in a sealing way and is used for reversely clamping the reducing plug-in connector;

the screw joint is fixedly connected with the screw body through threads, the guide ring is provided with a through hole for the insertion rod to penetrate through, and the through hole comprises a guide hole section with an axial length value L1 larger than an axial length value L2 of the reducing insertion joint, so that the central axis of the insertion rod and the central axis A of the guide ring gradually approach to each other in the penetrating process until the central axis of the insertion rod and the central axis A of the guide ring approach to each other and coincide with each other.

2. The connection assembly of claim 1, wherein the axial length value L1 of the pilot bore segment is greater than the minimum inner bore diameter value d of the pilot bore segment;

and/or the axial length value L2 of the reducing plug is larger than or equal to the maximum outer diameter D of the reducing plug.

3. The connection assembly of claim 1 or 2, wherein the inner bore diameter of the pilot bore section decreases in a direction from the threaded body to the nut sleeve, and an included angle α having an angle value of 0 ° O1 ° to 5 ° is formed between an inner wall profile generatrix B of the pilot bore section and a central axis a of the pilot ring.

4. The connecting assembly of claim 3, wherein the threaded connector and the reducer union are connected by a rod body, and the rod body and the reducer union are both in a shape of a swivel;

in the direction from the screw connector to the nut sleeve, the reducing plug connector comprises a first reducing section with gradually increasing outer diameter and a second reducing section with gradually decreasing outer diameter;

the shortest straight line C from the connection part of the first variable diameter section and the second variable diameter section to the outer peripheral wall of the rod body and the central axis E of the rod body form an included angle theta with the angle value of 0.01-5 degrees, and the angle value of the included angle theta is smaller than or equal to that of the included angle α.

5. The connection assembly of claim 4, wherein the included angle α has an angular value of 0.5 ° to 1.5 °.

6. A connection assembly according to claim 1 or claim 2, wherein the pilot bore section axial length value L1 is between 1.05 and 3 times the reducer spigot axial length value L2.

7. The connector assembly of claim 1 or 2 wherein the axial length L1 of the pilot hole section is between 1.15 and 1.5 times the minimum inner bore diameter d of the pilot hole section.

8. The connecting assembly according to claim 1 or 2, wherein the axial two ends of the pilot ring are respectively divided into a first end and a second end according to the sequence of the insertion rods passing through the pilot ring during assembly;

the through hole is also provided with a conical restraining hole section which is positioned at the second end of the pilot ring and is connected with the pilot hole section, the inner aperture of the conical restraining hole section is gradually increased in the direction from the first end to the second end, and the conical restraining hole section can at least partially accommodate a slip-off prevention mechanism for reversely clamping the inserted link.

9. The connecting assembly according to claim 1 or 2, wherein the outer wall of the pilot ring is provided with external threads extending from the second end to the first end, the second end of the pilot ring is provided with more than two grooves at intervals around the central axis, and the axial length of each groove is greater than or equal to that of the conical restraining hole section;

the first end of the pilot ring is formed with a first torque application portion that facilitates screwing.

10. The connecting assembly according to claim 4 or 5, wherein the disengagement prevention mechanism includes an annular locking body and an elastic member that is provided in the nut socket and urges the annular locking body in the direction of the guide ring;

the annular clamping body is provided with more than two arc-shaped clamping blocks which can be sequentially connected end to form a central through hole in a combined and surrounding mode, after the second reducing section penetrates through the central through hole and is spread out of the annular clamping body, each arc-shaped clamping block is reset and gathered at the position of the first reducing section along the conical restraining hole section under the pushing action of the elastic element to reversely clamp the reducing plug-in connector;

or, the annular body that stops is a whole, just at least two radial slots have been seted up around the axis to the internal perisporium that the annular body that stops, works as the inserted bar is to the annular body that stops one end application axial thrust and/or when keeping away from the radial thrust of axis, the annular body that stops splits into two above independent arc fixture blocks in the radial slot department of at least partial quantity, and the second reducing section runs through the annular body that stops that splits back, and each arc fixture block resets along toper restraint hole section under elastic element's the thrust action and gathers together first reducing section position is in order to reverse card to stop the reducing bayonet joint.

11. The connecting assembly according to claim 10, wherein one or both circumferential end surfaces of the arc-shaped fixture block are chamfered or rounded with the inner wall surface;

and/or, on any cross section of the arc-shaped fixture block, the outer arc center O1 of the arc-shaped fixture block is positioned between the inner arc F and the inner arc center O2, so that the wall thickness of the arc-shaped fixture block is gradually decreased from the middle to the two circumferential ends, and the shortest straight-line distance L3 from the outer arc center O1 to the inner arc center O2 is greater than or equal to the middle wall thickness of the arc-shaped fixture block;

and/or on the longitudinal section of the maximum wall thickness position of the arc-shaped fixture block, the ratio of the width value W of the bottom edge of the arc-shaped fixture block to the height value H of the arc-shaped fixture block is more than 0.65;

and/or a first folding angle lambda 1 is formed on an outer contour generatrix of the arc-shaped fixture block, a second folding angle lambda 2 is formed on an inner contour generatrix of the arc-shaped fixture block, the first folding angle lambda 1 is positioned below the second folding angle lambda 2 in an inclined manner or the first folding angle lambda 1 is positioned at the same height position of the second folding angle lambda 2, the distance from the second folding angle lambda 2 to the bottom of the arc-shaped fixture block is greater than or equal to the distance from the second folding angle lambda 2 to the top of the arc-shaped fixture block, and the angle values of the first folding angle lambda 1 and the second folding angle lambda 2 are greater than 90 degrees.

12. The connecting assembly according to claim 11, wherein, in the longitudinal section of the maximum wall thickness of the arc-shaped latch, the ratio between the width W of the bottom edge of the arc-shaped latch and the height H of the arc-shaped latch is greater than 0.7.

13. The connecting assembly of claim 11, wherein an angle β 1 between a straight line G connecting two ends of the inner contour generatrix of the ring-shaped locking body and the central axis Y is smaller than or equal to an angle γ between the contour generatrix I of the first variable diameter section and the central axis E of the insert rod.

14. The connection assembly of claim 11, wherein the length of the rod body of the insert rod is greater than or equal to the axial length value L1 of the pilot hole section so that the reducer plug of the insert rod can integrally pass through the pilot hole section;

the outer peripheral wall of the first reducing section and the outer peripheral wall of the rod body are in smooth transition, and/or at least one axial blocking surface is formed on the first reducing section at intervals along the axial direction;

one end or two ends of the inserting rod in the axial direction are provided with central holes;

a second torque applying part convenient for screwing is formed on the rod body of the inserting rod;

an axial positioning part is arranged on the rod body of the inserted rod close to the screw joint, and/or the rod body comprises a screw rod section, and a fastening nut matched with the screw rod section is supported at the top of the guide ring;

an included angle β 2 between an inner contour generatrix K of the annular clamping body and the central axis Y is smaller than or equal to an included angle gamma between a first variable-diameter section contour generatrix I and the central axis E of the inserted link;

or a plurality of biting teeth are formed on the inner wall of the annular clamping body along the axial direction, the tooth tips of the biting teeth are sequentially far away from the central axis Y of the annular clamping body in the direction from the screw connection body to the nut sleeve, the profile bus M connecting the tooth tips is a straight line, and the angle β 3 between the profile bus M and the central axis Y of the annular clamping body is smaller than or equal to the angle gamma between the profile bus I of the first variable-diameter section and the central axis E of the inserted bar.

15. Prefabricated part combination, including two or more prefabricated parts that dock in proper order along a direction, characterized in that, when two adjacent prefabricated parts are spliced together, the tip of a prefabricated part docks with the tip of another prefabricated part by the coupling assembling of any one of claims 1 to 9.

16. The prefabricated component assembly of claim 15, wherein each prefabricated component comprises a concrete body having a rigid skeleton embedded therein, the rigid skeleton having a plurality of stress bars distributed in an array;

and at least part of the stress ribs in one prefabricated component are fixedly connected with one end part of the screw connection body, and/or at least part of the stress ribs in the other prefabricated component are fixedly connected with the other end part of the nut sleeve.