CN216865114U

CN216865114U - Insertion structure and precast pile connecting mechanism

Info

Publication number: CN216865114U
Application number: CN202220166002.8U
Authority: CN
Inventors: 许万豪; 许顺良; 樊华
Original assignee: Zhejiang Jiaxing Yuhao Intelligent Equipment Co ltd; Jiaxing Xinchuang Concrete Product Co ltd
Current assignee: Zhejiang Jiaxing Yuhao Intelligent Equipment Co ltd; Jiaxing Xinchuang Concrete Product Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-07-01
Anticipated expiration: 2032-01-18

Abstract

The utility model provides an inserting structure and a precast pile connecting mechanism, wherein the inserting structure comprises a first sleeve, a second sleeve, an inserting rod, a positioning seat, an elastic piece and a spreading piece, the inserting rod is fixedly connected to the first sleeve, and a first groove extending along the axis direction is formed in the inserting rod; a first clamping tooth group is convexly arranged on the outer peripheral wall of the inserted rod, and a second clamping tooth group is arranged on the positioning component; the elastic piece, the positioning seat and the expanding piece are all accommodated in the second sleeve, and the positioning seat is fixedly connected to the second sleeve; the expanding piece is positioned in the second sleeve through the positioning seat, and the expanding piece can move in the second sleeve along the axial direction; the elastic piece is positioned on one side of the expanding piece opposite to the positioning seat and can elastically act on the expanding piece; the inserted bar can stretch into the positioning seat, and the expanding piece can stretch into the first groove and expand the inserted bar so as to enable the first clamping tooth group and the second clamping tooth group to be meshed with each other.

Description

Insertion structure and precast pile connecting mechanism

Technical Field

The utility model relates to the technical field of buildings, in particular to an inserting structure and a precast pile connecting mechanism.

Background

In the technical field of buildings, the end parts of two prefabricated pile connecting mechanisms are often required to be mutually butted and fixed, so that the length of the prefabricated pile connecting mechanisms is prolonged, and specific construction requirements are met. The common butt joint means is that a quick butt joint component is arranged between two prefabricated pile connecting mechanisms, the quick butt joint component is respectively connected with axial reinforcing steel bars in the two prefabricated pile connecting mechanisms, and the quick butt joint component can be mutually spliced to form non-detachable fixed connection.

The connection stability after the butt joint of the existing quick butt joint assembly is low, the prefabricated pile connecting mechanism at two ends can not be guaranteed to be reliably and relatively fixed, and the prefabricated pile connecting mechanism is easy to shake or even has strength damage when being subjected to lateral shearing or impact action.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide an insertion connection structure and a precast pile connection mechanism.

The utility model provides an inserting structure which comprises a first sleeve, a second sleeve, an inserting rod, a positioning seat, an elastic piece and a spreading piece, wherein the inserting rod is fixedly connected to the first sleeve and is provided with a first groove extending along the axis direction; the outer peripheral wall of the inserted rod is convexly provided with a first clamping tooth group, and the positioning seat is provided with a second clamping tooth group; the elastic piece, the positioning seat and the expanding piece are all accommodated in the second sleeve, and the positioning seat is fixedly connected to the second sleeve; the expanding piece is positioned in the second sleeve through the positioning seat, and the expanding piece can move in the second sleeve along the axial direction; the elastic piece is positioned on one side of the expanding piece opposite to the positioning seat and can elastically act on the expanding piece; the inserted bar can stretch into the positioning seat, and the expanding piece can stretch into the first groove and expand the inserted bar so as to enable the first clamping tooth group and the second clamping tooth group to be meshed with each other.

In an embodiment of the utility model, a stopping step is arranged in the second sleeve, the expanding member is movably arranged between the positioning seat and the stopping step, and the expanding member can elastically abut against the positioning seat under the action of the elastic member.

By the arrangement, the positioning seat and the stop step cooperate to limit the expanding and supporting piece in a space between the positioning seat and the stop step, so that the axial bidirectional stop limiting effect of the expanding and supporting piece is realized; in addition, the expanding and supporting piece is indirectly contacted with the stopping step through the elastic piece, so that direct rigid contact between the expanding and supporting piece and the stopping step is avoided, and the expanding and supporting piece is prevented from being extruded by the stopping step to generate strength damage.

In one embodiment of the present invention, the elastic member is an elastic washer having a diameter larger than an inner diameter of the stopping step, and the stopping step is capable of stopping the elastic washer.

So set up, the both ends of elastic washer respectively with backstop step with expand the piece butt, can expand the impact force that the piece received through the axial shrinkage deformation buffering along expanding the piece, adopt elastic washer's shock attenuation effect and durability better, and elastic washer's installation is more reliable.

In one embodiment of the utility model, the elastic washer is C-shaped, and the two ends of the elastic washer are located in different radial planes.

So set up, C font spring washer's both ends form the difference in height expanding the piece axial, can enough bear and come from expanding the bigger pressure of piece, still have higher deformability, produce bigger deformation volume to show the improvement and expand the buffering shock attenuation effect of piece.

In one embodiment of the present invention, the elastic member is made of metal.

So set up, the pressure-bearing and the deformability of the elastic washer made of metal material are better, and durability and life are higher, have higher material strength moreover, and difficult fracture is inefficacy.

In one embodiment of the utility model, the expanding and supporting piece comprises a supporting part and an expanding and supporting part, the outer diameter of the supporting part is larger than the inner diameter of the stopping step and the inner diameter of the positioning seat, and the supporting part is positioned in the second sleeve through the stopping step and the positioning seat; the opening part can extend into the first groove and open the inserted rod, and the first clamping tooth group and the second clamping tooth group are matched and fixed; the elastic member includes a first flexible member disposed between the support portion and the stopper step.

According to the arrangement, the second sleeve is limited by the stop step to the insertion position of the positioning seat in the second sleeve, so that the relative position precision of the insertion rod and the second sleeve can be ensured, and further the relative position precision of the first sleeve and the second sleeve is ensured; the first flexible piece can play a role in buffering and damping the supporting part, and the expansion piece is prevented from being impacted due to direct rigid contact between the supporting part and the stop step or the positioning seat in the butt joint process of the splicing structure, so that the expansion piece can be stably and fully spliced with the inserted bar, and the tightness of the splicing structure after the two pieces are combined is improved.

In an embodiment of the utility model, the plug structure further includes a second flexible member, and the second flexible member is disposed between the supporting portion and the positioning seat.

So set up, the first flexible spare and the second flexible spare that are located the supporting part both sides respectively all can cushion the shock attenuation to the supporting part to further reduce backstop step or positioning seat and expand the impact of propping the piece.

In one embodiment of the present invention, the first flexible member is fixedly disposed on a side of the supporting portion relatively close to the stopping step.

So set up, first flexible piece installation is more convenient, can be on the supporting part set up in advance again with second sleeve assembly after first flexible piece.

In an embodiment of the utility model, the second flexible piece is fixedly arranged on one side of the supporting part, which is relatively close to the positioning seat.

So set up, the installation of second flexible piece is more convenient, can be on the supporting part after the second flexible piece of preset again assembly positioning seat and second sleeve.

In one embodiment of the present invention, the first flexible member and/or the second flexible member is/are fixed to the support portion by adhesive.

So set up, first flexible spare can firmly adhere in the supporting part with the second flexible spare, bonding convenient operation, swift save time.

In one embodiment of the present invention, the first flexible member and/or the second flexible member is annular.

So set up, the annular flexible piece more conveniently sets up in the contact site of supporting part and backstop step and/or the contact site of supporting part and positioning seat, and the material utilization of flexible piece is higher.

In one embodiment of the present invention, the thickness of the first flexible member and/or the second flexible member is 0.5cm to 5 cm.

So set up, the material thickness of first flexible piece and/or second flexible piece has suitable shrink deformation scope, and buffering shock attenuation effect is showing to the space that occupies is small.

In one embodiment of the utility model, one end of the second sleeve, which is relatively far away from the first sleeve, is provided with a contraction opening, the contraction opening is used for connecting a reinforcing steel bar, and the elastic element is a spring which abuts against the inner wall of the contraction opening.

So set up, the shrink mouth can be connected with the outside reinforcing bar that has the tip upset, through butt reinforcing bar upset, prevents that outside reinforcing bar from breaking away from in the second sleeve. Two ends of the elastic piece are respectively contacted with the inner wall of the contraction opening and the expansion piece, so that the arrangement of the elastic piece in the second sleeve is more convenient and easier to implement.

In one embodiment of the utility model, the spring is a linear spring or a tower spring.

By the arrangement, the elastic piece with a determined elastic coefficient or an elastic coefficient which changes along with the expansion amount can be arranged in the second sleeve, so that the requirements of different construction operation conditions on use occasions are met.

In one embodiment of the utility model, the inserted rod comprises a connecting part and an inserting part which are connected with each other, the connecting part is used for being connected with the first sleeve, the inserting part comprises a plurality of fins, the fins surround and form a first groove, and the fins can be separated from each other under the action of the expanding piece so as to enable the first clamping tooth group and the second clamping tooth group to be meshed with each other.

So set up, be connected through the tooth meshing between inserted bar and the positioning seat and can combine into the grafting cooperation subassembly more closely, the fixed connection of the two is reliable, is difficult for producing relative motion or dislocation to be favorable to guaranteeing first sleeve and second telescopic fixed reliability.

The utility model further provides a precast pile connecting mechanism which comprises at least two precast building piles and the splicing structure, wherein the first sleeve and the second sleeve are fixedly arranged in the two precast building piles respectively, and the two precast building piles are connected through the splicing structure.

According to the splicing structure provided by the utility model, the expanding and supporting force which is outward along the radial direction is applied to the insertion rod through the expanding part, so that the insertion rod is deformed and is connected with the positioning seat in a matched and fixed mode, the connection strength after the splicing structure is butted and the bearing limit performance of the lateral shearing or impact action can be improved, and the splicing structure is not easy to shake or damage the strength. Therefore, the stability of the spliced structure after butt joint is better, and the spliced structure can be used for reliably butt joint and fixing an external structure such as a prefabricated building pile; the tooth meshing connection mode can improve the combination tightness of the inserted bar and the positioning seat, the inserted bar and the positioning seat are not easy to separate, and the reliable service of the inserting structure is ensured; in addition, in the process of inserting the expanding piece and the inserted rod, the elastic piece can play a role in buffering and damping the expanding piece, so that the expanding piece is prevented from being damaged in strength due to the impact of the inner wall of the first groove on the expanding piece; in addition, the elastic action of the elastic piece is favorable for driving the expanding piece to be fully inserted into the first groove.

Drawings

Fig. 1 is an assembly view of a plug structure according to a first embodiment of the present invention;

FIG. 2 is an assembly view of a plug structure according to a second embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of the plug-in structure shown in FIG. 1 at B;

FIG. 4 is an enlarged partial schematic view of another embodiment of the plugging structure shown in FIG. 1 at B;

FIG. 5 is an assembly view of a third embodiment of the present invention;

FIG. 6 is an assembly view of a fourth embodiment of the present invention;

FIG. 7 is a schematic illustration of a bayonet configuration according to a first embodiment of the present invention;

FIG. 8 is a schematic view of a second embodiment of a bayonet of the present invention;

FIG. 9 is a schematic view of a bayonet according to a third embodiment of the present invention;

FIG. 10 is a schematic view of a plunger according to a fourth embodiment of the present invention;

fig. 11 is a partially assembled view of a fifth embodiment of the plug structure of the present invention;

FIG. 12 is a partially assembled view of a sixth embodiment of the plug structure of the present invention;

fig. 13 is a partially assembled view of a plug structure according to a seventh embodiment of the present invention;

FIG. 14 is an enlarged partial view of the plug-in structure of FIG. 13 at X;

FIG. 15 is a partial schematic view of the stent according to one embodiment of the present invention;

FIG. 16 is a partial schematic view of a stent according to another embodiment of the present invention;

fig. 17 is a partially assembled view of the plug structure of the eighth embodiment of the present invention;

FIG. 18 is a schematic view of a spring according to one embodiment of the present invention;

FIG. 19 is a cross-sectional view of the plug-in structure of FIG. 17 taken along the plane A-A;

FIG. 20 is another cross-sectional view of the plug-in structure of FIG. 17 taken along the plane A-A;

description of reference numerals:

100. a plug-in mating assembly; 10. inserting a rod; 11. a connecting portion; 111. a first boss; 12. a plug-in part; 121. a fin; 122. a first mating portion; 1221. a first set of teeth; 123. a first groove; 124. inserting the deformation part; 125. a plug-in rigid part; 13. a first guide portion; 14. a second guide portion; 15. a first stopper portion; 16. a third guide portion; 20. a positioning assembly; 21. positioning seats; 211. a second boss; 212. an installation part; 213. a third protrusion; 214. a plug space; 215. mounting holes; 216. a second mating portion; 2161. a second set of teeth; 22. expanding the support piece; 221. a support portion; 222. a distraction section; 2221. a rod portion; 2222. a protrusion; 2223. an elastic portion; 2224. a rigid portion; 2225. a first opening; 223. a second groove; 2231. gluing layers; 224. a through hole; 231. a first guide portion; 232. a second guide portion; 24. a first gap; 30. an elastic layer; 41. a first flexible member; 42. a second flexible member; 51. an elastic member; 52. an elastic filling structure; 200. a plug-in structure; 210. a first sleeve; 201. a stopping step; 220. a second sleeve; 230. reinforcing steel bars; 240. heading; 250. and (4) contracting the mouth.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that when an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

In the field of building technology, it is often necessary to butt-joint and fix the ends of two precast pile connecting mechanisms to each other to extend the axial dimension of the precast pile connecting mechanisms. The common butt joint fixing means is that a quick butt joint component is arranged between two precast pile connecting mechanisms, and the quick butt joint component is respectively connected with axial reinforcing steel bars in the two precast pile connecting mechanisms and is mutually spliced to form non-detachable fixed connection.

In view of the above, the present invention provides a plug-in mating assembly 100, a plug-in structure 200 having the plug-in mating assembly 100, and a precast pile connection mechanism having the plug-in structure 200. The insertion fitting assembly 100 or the insertion structure 200 is arranged between the ends of the two precast pile connection mechanisms and is used for realizing the butt joint fixation of the two precast pile connection mechanisms. In one embodiment of the present invention, the plug-in mating assembly 100 and the plug-in structure 200 are used to connect two prefabricated building piles, and it is understood that in other embodiments, the plug-in mating assembly 100 and the plug-in structure 200 may also be used to butt-fix other types of prefabricated pile connection mechanisms, which will not be described in detail herein.

The plug-in matching component 100 provided by the utility model comprises an insertion rod 10 and a positioning component 20, wherein a plug-in space 214 into which the insertion rod 10 can extend and plug in is arranged in the positioning component 20, and the insertion rod 10 can extend into the positioning component 20 and is fixed relative to the positioning component 20; the plug structure 200 provided by the utility model comprises a first sleeve 210, a second sleeve 220 and the plug matching assembly 100, wherein the plug rod 10 and the positioning assembly 20 are respectively fixedly arranged on the first sleeve 210 and the second sleeve 220. In other words, the first sleeve 210 and the second sleeve 220 are inserted into and fixed to the positioning assembly 20 through the insertion rod 10, so that relative fixation is achieved, and thus the insertion structure 200 can relatively fix the axial reinforcing bars 230 in the prefabricated building piles at two ends.

The first sleeve 210 and the second sleeve 220 are respectively and fixedly arranged at the end parts of the two prefabricated building piles, coaxially arranged and jointly form an accommodating space for accommodating the installation of the splicing matching component 100; the end of the first sleeve 210 facing away from the second sleeve 220, and the end of the second sleeve 220 facing away from the first sleeve 210 are connected to the axial rebars 230 of two prefabricated building piles, respectively.

Please refer to fig. 1 to 6 and 11 to 13. In one embodiment, the first sleeve 210 forms a contraction opening 250 at a side close to the first sleeve 210, and the inner wall surface of the contraction opening 250 is in an annular step shape or a conical surface shape; the inner cavity of the first sleeve 210 forms a first channel for accommodating the steel bar upset 240 and a second channel for the steel bar to pass through at two axial ends of the contraction opening 250, and the inner diameter of the contraction opening 250 is smaller than the inner diameter of the first channel and larger than the inner diameter of the second channel.

The constrictions 250 may be used to abut the end upsets 240 of the axial rebars 230 in the pre-cast building pile to prevent the rebars 230 from escaping from the first sleeve 210. Likewise, to achieve the connection of the second sleeve 220 to the axial reinforcement 230, the second sleeve 220 also forms a constriction 250 on the side remote from the first sleeve 210.

Please refer to fig. 1 to 6 again, and refer to fig. 7 to 10. In one embodiment, the insert rod 10 includes a connecting portion 11 and an insert portion 12 that are axially disposed and fixed to each other. The connecting part 11 extends into the first sleeve 210 and is fixedly connected with the first sleeve 210, preferably in a thread fixing mode; the inserting part 12 extends out of the first sleeve 210 and extends into the inserting space 214 of the positioning component 20; the outer peripheral wall of the plug-in part 12 is further provided with a first matching part 122 for matching and fixing with the positioning assembly 20, the inner peripheral wall of the positioning assembly 20 is correspondingly provided with a second matching part 216 matching with the first matching part 122, and the plug-in rod 10 is further internally provided with a first groove 123 extending along the axial direction of the plug-in rod 10. It is understood that in other embodiments, the insert rod 10 can be fixedly connected to the first sleeve 210 by other means, such as adhesive bonding, welding, and tight fitting, but not limited to screw-threaded connection.

In an embodiment not shown, the second matching portion 216 may be directly disposed on the inner circumferential wall of the second sleeve 220, that is, the positioning assembly 20 may be omitted, and the second matching portion 216 may be processed at the same time when the second sleeve 220 is manufactured. It will be appreciated that whether the second mating portion 216 is formed directly on the inner peripheral wall of the second sleeve 220 or is provided on the locating assembly 20 and then fixedly attached to the inner wall of the second sleeve 220, the second mating portion 216 is substantially identical in construction and in method of use.

Furthermore, the peripheral outer wall of the insert rod 10 is further provided with a first boss 111, the first boss 111 is located between the connecting portion 11 and the inserting portion 12, and the outer diameter of the first boss 111 is larger than the maximum inner diameter of the inserting space 214 of the positioning component 20 and the maximum outer diameter of the connecting portion 11. The first protrusion 111 can abut against the opening end of the positioning component 20 to limit the depth of the connection portion 11 extending into the first sleeve 210, and can limit the depth of the insertion portion 12 extending into the positioning component 20 or the depth of the insertion portion 12 extending into the second sleeve 220.

Please refer to fig. 1 to 6 again. In one embodiment, the positioning assembly 20 includes a positioning seat 21 and a supporting member 22 fixed to each other. The positioning seat 21 is accommodated and fixedly installed in the second sleeve 220, and is hollow and cylindrical, and is used for forming an insertion space 214 into which the insertion rod 10 extends. The inner wall surface of the positioning seat 21 is provided with a second fitting portion 216 fitted and fixed with the first fitting portion 122. Preferably, the outer peripheral wall of the positioning seat 21 is provided with a threaded section, and is fixedly connected with the second sleeve 220 through a thread.

It is understood that in other embodiments, the positioning seat 21 may be fixedly connected to the second sleeve 220 in other manners, and in an embodiment not shown in the drawings, the positioning seat 21 may be integrally formed with the second sleeve 220.

Further, in one embodiment, a second boss 211 is convexly disposed on a circumferential outer wall of the positioning seat 21, an outer diameter of the second boss 211 is larger than an inner diameter of the second sleeve 220, and the second boss can abut against an end of the second sleeve 220 close to the first sleeve 210 to limit a depth of the positioning seat 21 extending into the second sleeve 220; when the insert rod 10 abuts against the second boss 211 of the positioning seat 21 through the first boss 111, the first matching portion 122 and the second matching portion 216 are matched with each other.

So set up, whether constructor through observing first boss 111 and positioning seat 21 second boss 211 butt, can conveniently and in time learn that inserted bar 10 and positioning seat 21 have formed reliable meshing fixed for the butt joint condition of pegging graft cooperation subassembly 100 is more directly perceived, is favorable to the construction operation high efficiency to go on.

In order to simplify the structure of the insertion matching assembly 100, improve the reliability of the combination of the first boss 111 and the insertion rod 10 and the combination of the second boss 211 and the positioning seat 21, and reduce the manufacturing cost of the insertion rod 10 and the positioning seat 21, the first boss 111 and the insertion rod 10 are integrally formed; and/or the second boss 211 and the positioning seat 21 are integrally formed.

Preferably, the first boss 111 and/or the second boss 211 are annular protrusions. So set up, the pressure between first boss 111 and first sleeve 210, and/or second boss 211 and the second sleeve 220 can disperse and act on the annular terminal surface of first boss 111 and second boss 211, also promptly first boss 111 evenly undertakes butt pressure with second boss 211, and the butt between inserted bar 10 and first sleeve 210, positioning seat 21 and the second sleeve 220 is more steady.

It is understood that in other embodiments, there may be one or more first bosses 111 and/or second bosses 211, as long as they can function as a stop; the first bosses 111 are annularly and uniformly distributed on the outer peripheral wall of the insert rod 10 by taking the axis of the insert rod 10 as a center, and the second bosses 211 are annularly and uniformly distributed on the outer peripheral wall of the positioning seat 21 by taking the axis of the positioning seat 21 as a center.

Preferably, the cross-sectional shape of the first boss 111 on the axial plane of the plunger 10 is a circular arc or an elliptical arc; and/or the cross section of the second boss 211 on the axial plane of the positioning seat 21 is in the shape of an arc or an elliptic arc.

Further, the transition position between the first boss 111 and the peripheral wall of the connecting portion 11 and/or the transition position between the second boss 211 and the peripheral wall of the positioning seat 21 are circular arc-shaped or elliptical arc-shaped. With such an arrangement, the first boss 111 and the second boss 211 have smooth edge profiles, and are not easy to cause local stress concentration and further fracture, crush or abrasion.

In one embodiment, the first boss 111 may also be a prism-like structure with a polygonal radial cross-section, for example, the first boss 111 may be a regular hexagonal prism structure similar to a nut head.

So set up, the first boss 111 of polygon prism form can form the fixed cooperation of splining with outside clamping tool, and this is favorable to the constructor to use the circumference outer wall of the first boss 111 of conventional outside instrument centre gripping, and then presss from both sides the inserted bar 10 tight fixedly to the assembly of the cooperation subassembly 100 of pegging graft is conveniently carried out.

The expanding element 22 is used for expanding the insert rod 10 radially outward to fix the first matching portion 122 and the second matching portion 216. The expanding member 22 is formed separately from the second sleeve 220 and at least partially received in the positioning seat 21. When the inserting rod 10 extends into the positioning seat 21, the expanding member 22 is inserted into the first groove 123 and abuts against the inner wall surface of the first groove 123, and the inserting portion 12 is expanded radially outward under the pressure of the expanding member 22, so that the first matching portion 122 and the second matching portion 216 are matched and fixed. Preferably, the spreader 22 is fixedly connected to the inner wall surface of the second sleeve 220 by a screw thread.

It is understood that the spreader 22 can also be integrally formed with the positioning base 21, as shown in fig. 2. At this time, the sectional shape of the positioning member 20 on the axial plane passing through the axis thereof is E-shaped or chevron-shaped; the expanding piece 22 can be formed separately from the second sleeve 220 and welded and fixed; in addition, the positioning seat 21 and the expanding member 22 can also be formed separately and then fixedly connected by a non-detachable manner, such as welding, screwing, tight fitting, etc.

Preferably, the first recess 123 is a blind slot extending in the spigot 12.

Please refer to fig. 1 to 6, fig. 11 to 13, and fig. 14 together. The plug-in matching assembly and the plug-in structure provided by the utility model are suitable for connecting the assembled building nodes.

In one embodiment, the expanding member 22 includes an expanding portion 222 and a supporting portion 221 fixed to each other, the expanding portion 222 is accommodated in the positioning seat 21, and the supporting portion 221 can be accommodated in the positioning seat 21 or extend out from one end of the positioning seat 21 away from the first sleeve 210. The expanding portion 222 is used for inserting into the first groove 123 and expanding the inserted rod 10, and the supporting portion 221 is used for realizing the fixed connection between the expanding member 22 and the second sleeve 220. The supporting portion 221 is fixedly disposed at an end of the second sleeve 220 relatively far away from the first sleeve 210. Preferably, the outer peripheral wall of the sleeve is provided with an external thread section fixedly connected with the second sleeve 220.

The term "expand the plunger 10" means that the outer diameter of the portion of the plunger 10 that is expanded is increased.

In the present embodiment, the support portion 221 is integrally formed with the expanding portion 222. It is understood that in other embodiments, the supporting portion 221 and the expanding portion 222 may be formed separately and fixedly connected. For example, the expanding member 22 and the positioning seat 21 are formed separately, and the supporting portion 221 of the expanding member 22 is connected with the positioning seat 21 by screw, welding, gluing or interference. By the arrangement, the positioning seat 21 and the expanding piece 22 can be respectively processed and relatively fixedly connected, the fixed connection between the supporting part 221 and the positioning seat 21 is easy to realize, the reliability is good, and the coaxiality of the inserted link 10 and the positioning seat 21 after insertion and fixation is improved.

The expanding portion 222 is fixedly disposed on the supporting portion 221, protrudes toward the insert rod 10 along the axis of the second sleeve 220 and extends into the positioning seat 21, and an annular insertion space 214 for the insert rod 10 to enter is formed between the inner wall surface of the positioning seat 21 and the outer peripheral wall of the expanding portion 222.

It is understood that, in other embodiments, the supporting portion 221 may also be screwed, tightly fitted, or glued to the inner peripheral wall of the positioning seat 21, or tightly fitted or glued to the inner wall surface of the second sleeve 220, as long as the expanding portion 22 can be fixed relative to the positioning seat 21, and an annular insertion space 214 is formed between the expanding portion 222 and the inner wall surface of the positioning seat 21 for the insertion of the insert rod 10.

When the grafting cooperation subassembly 100 is pegged graft fixedly to behind the grafting structure 200 that forms the butt joint fixed state with first sleeve 210 and the installation of second sleeve 220, first sleeve 210, inserted bar 10, positioning seat 21, expand the equal coaxial setting of piece 22, second sleeve 220, and with the coaxial setting of the axial reinforcing bar 230 in the prefabricated building pile who connects first sleeve 210 and second sleeve 220.

Further, as a preferred embodiment, a first latch set 1221 extending along the axial direction is provided on the outer peripheral wall of the insertion part 12, and the first latch set 1221 forms the first matching part 122; the inner peripheral wall of the positioning seat 21 is provided with a second latch group 2161 capable of being engaged with the first latch group 1221, and the second latch group 2161 forms the second mating portion 216. The plunger 10 and the positioning assembly 20 are engaged with each other by the first latch set 1221 and the second latch set 2161 for fixing.

So set up, be connected more reliably between inserted bar 10 and the locating component 20, combine closely the load limit higher, the stability after grafting cooperation subassembly 100 butt joint is fixed is better.

It is understood that in other embodiments, the first mating portion 122 and the second mating portion 216 may not be provided with the first latch set 1221 and the second latch set 2161, for example, a latch recess (not shown) and a latch protrusion (not shown) may be provided, respectively, which can be engaged with each other, or a mating surface capable of forming a tight-fit fixing may be provided, and the fastening may be performed by a latch fit or a tight-fit fixing, but is not limited to the above-mentioned manner of tooth engagement fixing. In addition, the shape of the latch is not limited to the shape shown in the figure, and the latch may also be a ratchet with a triangular axial section or other common anti-pulling tooth shapes, which are not limited herein.

Specifically, the first latch group 1221 includes a plurality of first latches of annular configuration arranged axially along the plug rod 10, and the second latch group 2161 includes a plurality of second latches of annular configuration arranged axially along the plug rod 10; the number of the first clamping teeth is less than or equal to that of the second clamping teeth.

Due to the arrangement, the meshing of the plurality of first clamping teeth and the plurality of second clamping teeth increases the meshing contact area of the inserted link 10 and the positioning assembly 20, firm tooth meshing fixation is formed between the inserted link 10 and the positioning assembly 20, mutual separation or slippage is not easy to occur under the action of external force, and the fixation reliability between the inserted link 10 and the positioning assembly 20 is improved; in addition, the first latch group 1221 of the plug rod 10 can be fully used for being meshed with the second latch group 2161, so that the plug rod 10 and the positioning assembly 20 are fully meshed, and the meshing rate of the first latch group 1221 is guaranteed.

It should be noted that, the first latch group 1221 and the second latch group 2161 are engaged and fixed, and not limited to the number of latches in which the first latch and the plurality of second latches are engaged in a one-to-one correspondence, but not limited to the shape of the first latch matching the shape of the tooth socket of the second latch, as long as the two are engaged to keep the inserted link 10 and the positioning assembly 20 reliably fixed relative to each other. In other words, the number of the first latch and the second latch may be different, the shape of the first latch may be different from the shape of the tooth space between the two second latches, and particularly, the first latch near the supporting portion 221 may only form partial contact engagement with the second latch, so long as the inserted link 10 is ensured to reach the predetermined inserting position in the positioning assembly 20, and sufficient engagement fixation of the inserted link 10 and the positioning assembly 20 can be achieved regardless of the degree of the engagement contact of the first latch and the second latch.

Please refer to fig. 5 and 10. In one embodiment, a first latch tooth height of the first latch tooth group 1221 near the insertion start point of the inserted link 10 is smaller than a first latch tooth height relatively far from the insertion start point of the inserted link 10, that is, a plurality of first latch tooth heights of the first latch tooth group 1221 decrease along a direction in which the inserted link 10 extends into the positioning assembly 20 or a direction from the propping portion 222 to the supporting portion 221. The tooth height refers to a height difference between a tooth top of the first latch and a tooth groove adjacent to the tooth top in the radial direction of the inserted link 10. The dimension H in fig. 10 corresponds to the tooth height of the first latch.

The insertion starting point of the insertion rod 10 refers to an end of the insertion rod 10 relatively far away from the first sleeve 210, that is, an end of the insertion rod that enters the insertion space 214 first when the insertion rod 10 enters the positioning assembly 20; the insertion direction is a direction in which one end of the spreading portion 222 away from the support portion 221 is directed toward the support portion 221 along the axial direction of the second sleeve 220.

So set up, be favorable to reducing the resistance when pegging graft and the meshing of inserted bar 10 and locating component 20, realize a plurality of first latches and the abundant meshing of second latch and fix. Especially when the radial dimension of the strutting portion 222 is increasing along the direction close to the supporting portion 221, the resistance and the deformation amount when the inserted link 10 extends into the inserting space 214 are increased, the fixed resistance and the difficulty of the engagement of the first latch and the second latch which are relatively close to the inserting starting point on the first latch group 1221 are increased, so that the reduction of the height of the first latch along the direction in which the inserted link 10 is inserted into the positioning assembly 20 is beneficial to reducing the difficulty of the engagement, and the connection strength can be ensured.

Please refer to fig. 2 and 8. In one embodiment, the number density of the first latches decreases in the insertion direction of the insert rod 10.

So set up, first latch is sparse along the inserted direction of inserted bar 10 gradually, can further reduce the fixed degree of difficulty of first latch and second latch meshing, also is favorable to guaranteeing that distraction portion 222 can fully peg graft in first recess 123.

Please refer to fig. 6 and fig. 9. In one embodiment, the thickness of the first plurality of latches increases along the insertion direction of the insert rod 10. The tooth thickness refers to the dimension of the first latch along the axial direction of the insert rod 10, and the dimension represented by D in fig. 9 is the tooth thickness corresponding to the first latch.

With the arrangement, the strength of the first latch is increased along the insertion direction of the inserted link 10, so that the inserted link 10 and the positioning component 20 are combined more tightly and stably, and the first latch close to the insertion starting point of the inserted link 10 is prevented from being broken; in addition, the tooth thickness of the first latch relatively close to the insertion starting point is greater than the tooth thickness of the first latch relatively far away from the insertion starting point, so that the second latch on the positioning component 20 close to the inserted link 10 is not easy to be engaged with the first latch close to the insertion starting point in advance, thereby avoiding that the first latch cannot be sufficiently engaged with the second latch and ensuring that the inserted link 10 is sufficiently inserted into the positioning component 20.

As a preferred embodiment, among the plurality of first latches of the first latch group 1221, the first latch closest to the insertion start point of the inserted link 10 has a tooth thickness greater than or equal to that of the other first latches.

With the arrangement, the first latch closest to the insertion starting point can bear larger meshing pressure than other first latches, so that the strength and the bearing capacity of the inserted link 10 at one end of the insertion starting point are improved, and the yield deformation or the fracture failure of the insertion starting point of the inserted link 10 is avoided.

It is understood that in other embodiments, the plurality of first latches on the insert rod 10 and the plurality of second latches on the positioning assembly 20 may also be latch structures with the same shape, i.e. uniform tooth height and tooth thickness; the number density of the first latch and the second latch in the axial direction of the insert rod 10 or the positioning assembly 20 may also be uniform, that is, the distribution of the first latch and the second latch on the insert rod 10 and the positioning assembly 20 may also be uniform.

In one embodiment, the insertion part 12 comprises a plurality of fins 121, the plurality of fins 121 are spaced apart from each other and are disposed around the axis of the insertion rod 10, and the plurality of fins 121 surround to form the first groove 123. During the insertion of the bayonet 10 into the positioning assembly 20, the plurality of fins 121 enter the insertion space 214 between the expanding portion 222 and the second mating portion 216, and are expanded radially outward along the bayonet 10 by the pressing action of the expanding member 22 to move away from each other, so that the first latch set 1221 is engaged with the second latch set 2161.

The arrangement of the plurality of fins 121 further improves the deformation capacity and the deformation range of the inserted rod 10 under the extrusion action of the opening part 222, and reduces the probability of strength damage generated when the inserting part 12 deforms. Specifically, the number of the fins 121 is 2 to 8. When there are two fins 121, the projection areas of the two fins 121 on the radial plane of the insert rod 10 are two semi-circular arcs or two arches; when the number of the fins 121 is 3 or more than 3, the plurality of fins 121 are uniformly distributed around the axis of the insert rod 10.

Please refer to fig. 7 again. In one embodiment, the plurality of fins 121 are gradually tapered along the insertion direction of the insert rod 10, and in an unstressed state, the outer diameter of the insert rod 10 at the end relatively close to the insertion starting point is smaller than the outer diameter of the end relatively far from the insertion starting point.

So set up, when strutting portion 222 and pegging graft in first recess 123, because fin 121 expands and props the deformation, fin 121 has the shrink trend under the internal stress effect to produce the packing force to strutting portion 222 periphery wall, therefore can further strengthen the fixed effect between inserted bar 10, positioning seat 21 and the piece 22 that expands on fin 121 and positioning seat 21 meshing fixed basis, the three combines inseparably, firmly, the durability and the shock resistance of grafting cooperation subassembly 100 are showing and are promoting.

It will be appreciated that in other embodiments, the spigot 12 may not be provided with the fins 121, but may take other forms of deformable structure. For example, a contraction opening communicated with the first groove 123 is formed in the side wall of the insertion part 12, at this time, the projection shape of the insertion part 12 on the radial plane of the insertion rod 10 is approximately C-shaped, when the expanding part 222 is inserted into the first groove 123, the width of the contraction opening is increased, so that the insertion part 12 area on two sides of the contraction opening is expanded and can be matched with the inner wall surface of the positioning seat 21; in addition, in other embodiments, the insertion part 12 does not need to be gradually folded along the insertion direction of the insertion rod 10, as shown in fig. 8 to 10, the insertion part 12 may also be a cylindrical structure coaxial with the connection part 11; or the fins 121 have an equal outer diameter dimension in the insertion direction of the insert pin 10.

Please refer to fig. 7 to 12 again. In one embodiment, one of the first latch set 1221 and the second latch set 2161 is provided with a first guide portion 13, and the other is provided with a second guide portion 14 matching with the first guide portion 13; the first guide portion 13 is disposed obliquely with respect to a radial plane of the plunger 10. The first blocking portion 15 is disposed on a side of the first latch set 1221 or the second latch set 2161 facing away from the first guiding portion 13, and the first blocking portion 15 can block the insertion rod 10 from being pulled out of the positioning assembly 20.

Specifically, the first guiding portion 13 is an annular or arc-shaped inclined surface on one side of the first latch far away from the first sleeve 210, and the first stopping portion 15 is an annular or arc-shaped inclined surface on one side of the first latch far away from the second sleeve 220; the second guiding portion 14 is an annular inclined surface on one side of the second latch close to the first sleeve 210. The inclination tendency of the first guide portion 13 is: the outer diameter dimension of the first guide portion 13 decreases in the direction in which the insert rod 10 protrudes into the positioning assembly 20.

Preferably, please refer to fig. 4. In one embodiment, after cutting along the axial direction of the plug-in mating component 100, the first stopping portion 15 on the insert rod 10 is in a barbed shape, that is, on an axial cross section of the plug-in mating component 100, an included angle between the first stopping portion 15 and a root bottom of an adjacent first latch is an acute angle.

It is understood that, in other embodiments, the angle between the first stopping portion 15 and the bottom of the root of the adjacent first latch may also be a right angle, as shown in fig. 3, when the plug-in mating assembly 100 is cut along the axial direction.

By the arrangement, the first guide part 13 and the second guide part 14 can form sliding fit contact, so that the centering and positioning effects of the positioning component 20 on the inserted rod 10 can be improved, the coaxiality of the expansion piece 22, the inserted rod 10 and the positioning seat 21 can be improved, the insertion resistance can be further reduced, and the low-resistance quick butt joint of the insertion fit component 100 can be realized; the first stopping portion 15 can improve the reliability of the tooth engagement between the inserted link 10 and the positioning assembly 20, prevent the inserted link 10 from being separated from the positioning assembly 20 due to external interference, and ensure that the inserted link 10 and the positioning seat 21 are always in tooth engagement when the expanding member 22 expands the inserted link 10.

Further, the insert rod 10 further forms a third guide portion 16 at an end of the first groove 123 opposite to the first sleeve 210, and the third guide portion 16 is used for guiding the opening portion 222 into the first groove 123.

Specifically, the third guide portion 16 is a chamfered structure in the opening of the first groove 123 near the support portion 221. The third guiding portion 16 can reduce the insertion resistance between the opening edge of the first groove 123 and the end of the opening portion 222, and guides and centers the opening portion 222 to drive the opening portion 222 to be quickly inserted into the first groove 123, so that the insertion efficiency is improved, and the phenomenon that the opening portion 222 is deflected relative to the first groove 123 and further the insertion portion 12 is damaged due to uneven stress is avoided.

In one embodiment, the peripheral wall of the plunger 10 is provided with at least one marking for identifying the depth of the plunger 10 extending into the insertion space 214 of the positioning assembly 20. Specifically, the marks include scales distributed along the axial direction of the insert rod 10; the scale comprises numbers; is marked as a ring and extends in the circumferential direction of the outer wall of the plunger 10.

With the arrangement, the position of the inserted link 10 in the positioning component 20 can be more visually shown by the mark on the peripheral wall of the inserted link 10, and the butt joint condition of the inserting matching component 100 can be clearly fed back to a construction site worker in a form of presenting the relative position information between the positioning component 20 and the mark, so that the efficiency of construction operation is improved; the distance between the scales can correspond to the insertion depth of the inserted link 10 in the positioning assembly 20, and the insertion depth of the inserted link 10 in the positioning assembly 20 can be accurately reflected through the scales; scales are conveniently marked as the inserting depth of the inserted link 10 in the positioning component 20, so that the inserting depth information of the inserted link 10 in the positioning component 20 is more visual and clear; in addition, the indicia can be seen at any radial position of the bayonet 10 to facilitate timely notification to the job site personnel of the mating condition of the bayonet mating assembly 100.

Please refer to fig. 2 again. In one embodiment, the radial dimension of the expanding portion 222 increases in the insertion direction of the insert rod 10, and the radial dimension of the expanding portion 222 increases in the insertion direction of the insert rod 10; accordingly, the radial dimension of the first groove 123 increases in the insertion direction of the insert rod 10. Along with the increase of the depth of the expanding part 222 inserted into the first groove 123, the deformation amount of the inserting part 12 of the inserted link 10 which is deformed along the radial direction is increased, and the expanding force applied by the expanding part 222 to the inner wall surface of the first groove 123 is increased, so that the inserted link 10 is deformed more sufficiently, and the inserted link 10 is engaged with the positioning seat 21 sufficiently and reliably.

Preferably, the spreading portion 222 is conical or truncated cone-shaped, and the spreading portion 222 matches the size of the first groove 123.

With such an arrangement, the shape of the expanding part 222 is simple, the expanding part 22 is convenient to process and form, and the deformation process of the peripheral wall of the inserted rod 10 is mild, so that the difficulty in inserting the inserted rod 10 and the expanding part 22 is reduced; in addition, when the insert rod 10 is fully inserted into the positioning seat 21, the opening portion 222 is tightly attached to the inner wall surface of the first groove 123, so that the integral stability of the insert mating assembly 100 is better, and the insert rod 10 and the positioning assembly 20 are not easy to shake or dislocate, which is beneficial to the reliable service of the insert mating assembly 100 and the insert structure 200.

Preferably, the end of the opening part 222 relatively close to the inserted link 10 is provided with a chamfer, the chamfer makes the surface shape of the end of the opening part 222 close to the inserted link 10 blunt, which can prevent the end of the inserted link 10 from damaging the surface of the opening part 222, and the chamfer can provide a guiding function when the opening part 222 enters the first groove 123, so as to realize the centered insertion of the opening part 222 and the inserted link 10.

Preferably, the maximum movable range area of the propping-open part 222 at the end relatively far from the supporting part 221 is smaller than the area of the first groove 123 in the radial plane of the inserted rod 10.

So set up, the inside space that can supply the portion 222 of strutting to keep away from the activity of supporting part 221 that forms of first recess 123 to leave the space surplus, avoid when expanding the activity of piece 22 relative inserted bar 10, the tip that the portion 222 of strutting keeps away from supporting part 221 receives the influence of first recess 123 inner wall, prevents that it from being extruded or colliding by first recess 123 inner wall, consequently can reduce the degree of difficulty that piece 22 and inserted bar 10 pegged graft, resistance when eliminating the two and peg graft.

In one embodiment, at least a portion of the expansion portion 222 has elasticity, and the expansion portion 222 can elastically contract and reduce the radial dimension under the pressing of the inner wall of the first groove 123.

When the opening part 222 is inserted into the first groove 123, the elastic part of the opening part 222 applies radial extrusion force to the inner wall of the first groove 123 contacting with the elastic part, so that the opening part 222 is combined with the inserted rod 10 more tightly, which is beneficial to improving the stability of the inserted and matched assembly 100 after butt joint; at least part of the opening part 222 obtains elastic deformation capability, which can avoid direct rigid contact with the inner wall of the first groove 123, and prevent the opening part 222 from being damaged by impact, so that the elastic part of the opening part 222 plays a role in buffering and damping the expansion piece 22, and the service life of the plug-in matching assembly 100 is prolonged.

Please refer to fig. 17. In one embodiment, the expanding portion 222 includes an elastic portion 2223 and a rigid portion 2224, which are arranged in this order in the axial direction of the expanding portion 222. The elastic portion 2223 is located at an end of the expanding portion 222 relatively far from the first sleeve 210, and the rigid portion 2224 is located at an end of the expanding portion 222 relatively near the first sleeve 210. The elastic portion 2223 has a larger elastic deformation capability than the rigid portion 2224, and can be deformed more significantly in the radial direction of the opening portion 222.

Preferably, the elastic portion 2223 and the rigid portion 2224 are both made of a metal material. In the process of inserting the inserting rod 10 and the positioning component 20, the opening portion 222 and the inner wall of the first groove 123 are always in metal contact, so that the resistance of the opening portion 222 entering the first groove 123 can be reduced, the inserting difficulty is reduced, and the butt joint efficiency of the inserting matching component 100 can be improved.

Further, the elastic portion 2223 is fitted over the rigid portion 2224. With such an arrangement, the connection between the elastic part 2223 and the rigid part 2224 is simple, the two parts can be easily, rapidly and conveniently assembled, and the connection is firmer.

Further, the height of the elastic portion 2223 in the axial direction of the positioning assembly 20 is at least one third of that of the rigid portion 2224, so that the elastic shape of the elastic portion 2223 is greatly changed, and the damping effect is significant.

Further, the rigid portion 2224 is provided with a step (not numbered), and the elastic portion 2223 is positioned by the step. This arrangement facilitates the mounting and positioning of the flexible portion 2223 on the rigid portion 2224.

Further, in one embodiment, the rigid portion 2224 and the flexible portion 2223 are in smooth transition. So set up, the regional surface that rigid portion 2224 and elastic component 2223 are close to each other is smooth-going, and at the in-process that props up 222 grafting inserted bar 10, the inner wall of first recess 123 can smoothly transition to rigid portion 2224 from elastic component 2223, can reduce the grafting degree of difficulty of inserted bar 10 and positioning seat 21, can carry out grafting operation more swiftly laborsavingly, reduces the required material resources cost of construction.

In one embodiment, at least part of the opening portion 222 is externally provided with the elastic layer 30, the elastic layer 30 can elastically contract under the extrusion of the inner wall of the first groove 123 and reduce the radial dimension, and the opening portion 222 can radially expand or radially contract by the elastic action of the elastic layer 30.

When the opening part 222 is inserted into the first groove 123, the elastic layer 30 can respectively apply extrusion forces to the inner wall of the first groove 123 and the outer wall of the opening part 222, so that the opening part 222 is more tightly combined with the inserted link 10, which is beneficial to improving the stability of the inserted connection assembly 100 after butt joint; the elastic layer 30 is simply and easily installed on the opening portion 222, and the elastic layer 30 can also prevent the inner wall of the first groove 123 from rigidly contacting the opening portion 222, and prevent the opening portion 222 from being damaged by the impact of the inner wall of the first groove 123, thereby playing a role in buffering and damping, and prolonging the service life of the plug-in mating component 100 and the plug-in structure 200.

Specifically, the elastic portion 2223 is a sleeve structure having a hollow channel, a first opening 2225 extending in the axial direction is formed in a side wall of the elastic portion 2223, and the first opening 2225 allows the elastic portion 2223 to obtain a margin of shrinkage deformation when the side wall is subjected to an external force, so that an operator can conveniently expand the elastic portion 2223 along the first opening 2225 to sleeve the elastic portion 2223 on the rigid portion 2224; the two ends of the elastic portion 2223 are a large diameter end and a small diameter end, respectively, the large diameter end is relatively far away from the first sleeve 210, and the small diameter end is relatively close to the first sleeve 210.

Accordingly, the rigid portion 2224 is formed with a large diameter section and a small diameter section in the axial direction, respectively. The large diameter section is relatively close to the first sleeve 210 and is approximately conical; the small diameter section is relatively far from the first sleeve 210 and is approximately cylindrical. The minimum outer diameter of the small diameter section is smaller than the maximum outer diameter of the large diameter section, and an abutting surface for abutting against the small diameter end of the elastic part 2223 is formed between the small diameter section and the large diameter section.

When the elastic portion 2223 is sleeved on the rigid portion 2224 and abuts against the above-mentioned abutment surface, the outer diameter of the small diameter end is not greater than the maximum outer diameter of the large diameter section, that is, the outer diameter of the expanding portion 222 changes continuously without sudden change in the direction away from the first sleeve 210. Therefore, the large diameter section of the rigid portion 2224 and the small diameter end of the elastic portion 2223 are in smooth transition, so as to ensure that the insertion rod 10 can be smoothly inserted into the positioning seat 21; the small diameter section of the rigid portion 2224 has a gap with the elastic portion 2223 for the elastic portion 2223 to contract radially.

Please refer to fig. 19 to 20. Further, in one of the embodiments, the elastic portion 2223 has a cylindrical structure having a longitudinal wave shape.

With such an arrangement, the longitudinal waves of the elastic part 2223 can contract and deform under the pressure action of the inner wall of the first groove 123, and the longitudinal waves can improve the deformation capacity of the elastic part 2223; in addition, the two ends of the first opening 2225 can be closed and deformed under the pressure action of the inner wall of the first groove 123, so that the deformation capacity and the maximum deformation of the elastic portion 2223 are further improved, and the damping effect of the opening portion 222 is significant.

It is understood that in other embodiments, the peripheral wall of the elastic portion 2223 may not be provided with longitudinal undulations. As shown in fig. 19, the outer peripheral wall of the elastic portion 2223 has a conical surface shape.

Please refer to fig. 11 again. In one embodiment, the elastic layer 30 is disposed on the entire outer portion of the opening portion 222 and is fixed to the outer peripheral wall of the opening portion 222 by adhesive bonding. So set up, can improve the firm degree of elasticity layer 30 adhesion on strutting portion 222 through the fixed of gluing, and the arrangement of elasticity layer 30 is simpler, and the cost is lower and realize easily.

Please refer to fig. 13 again, and also refer to fig. 14. In one embodiment, the distracting portion 222 includes a shaft portion 2221, a protrusion 2222 is provided on an outer peripheral wall of the shaft portion 2221, and an elastic layer 30 is provided between the protrusion 2222 and the shaft portion 2221.

With such an arrangement, a space for accommodating the elastic layer 30 is formed between the rod portion 2221 and the protruding portion 2222, the elastic layer 30 can be filled in the space, and the surface of the elastic layer 30 cannot be in direct sliding contact with the inner wall of the first groove 123 in the process of inserting the opening portion 222 into the insertion rod 10, so that the insertion resistance of the opening portion 222 into the first groove 123 can be reduced, and the insertion difficulty can be reduced; in addition, the elastic layer 30 can support the protrusion 2222, and prevent the outer wall of the protrusion 2222 from being broken and failing due to the pressing action of the inner wall of the first groove 123.

Please refer to fig. 15. Specifically, the stem portion 2221 is integrally formed with the protruding portion 2222, and the protruding portion 2222 is plural, and the plural protruding portions 2222 are annularly provided to the outer peripheral wall of the stem portion 2221; the projection 2222 has a barb-like cross-sectional shape passing through the axis of the expander 22, and opens toward the second sleeve 220 side.

With such an arrangement, the connection between the protruding portion 2222 and the rod portion 2221 is more reliable, the plurality of elastic layers 30 can be arranged on the expanding portion 222, the plurality of elastic layers 30 can improve the overall elasticity and deformation capability of the expanding portion 222, the accommodating space formed between the protruding portion 2222 and the rod portion 2221 can more reliably accommodate the elastic layers 30, the direction in which the elastic layers 30 enter and fill the gap between the protruding portion 2222 and the rod portion 2221 faces the direction in which the expanding portion 222 enters the first groove 123, and therefore, when the expanding portion 222 is inserted into the first groove 123, the elastic layers 30 cannot slip out of the gap and fall off.

It will be appreciated that in other embodiments, the projection 2222 and stem 2221 may be formed separately.

Further, in some embodiments, the projection 2222 may also be continuously provided along the circumference of the shaft portion 2221. Referring to fig. 16, the expanding portion 222 shown in fig. 16 is a sleeve or a ring structure having a conical outer peripheral wall, which is sleeved on the outer peripheral wall of the rod portion 2221 and serves as the protrusion portion 2222, wherein the end of the sleeve or the ring structure with a smaller outer diameter is clamped to the outer peripheral wall of the rod portion 2221, and the end with a larger outer diameter faces the supporting portion 221 and forms a gap with the rod portion 2221.

With this arrangement, the protruding portion 2222 can be more firmly fitted to the outer peripheral wall of the stem portion 2221, and a larger space for accommodating the elastic layer 30 can be formed between the protruding portion 2222 and the stem portion 2221.

Alternatively, the elastic layer 30 may be made of rubber, or the elastic layer 30 may be made of other materials.

Please refer to fig. 6 again. In one embodiment, one of the end of the insert rod 10 and the end of the positioning assembly 20 is provided with a first guide 231, and the other is provided with a second guide 232; the first guiding portion 231 is used for guiding the insertion rod 10 to extend into the positioning assembly 20, and the second guiding portion 232 and the first guiding portion 231 cooperate with each other to guide the insertion rod to extend into the positioning assembly 20.

The first guide part 231 can reduce the insertion resistance when the insertion rod 10 starts to enter the positioning component 20, so that the insertion rod 10 can conveniently and quickly enter the insertion space, the coaxiality of the insertion rod 10 and the positioning component 20 during insertion is improved, the centering performance of the insertion rod 10 and the positioning component 20 is further ensured, the low-resistance quick butt joint of the insertion matching component 100 is facilitated, and the butt joint efficiency is improved; the second guiding portion 232 cooperates with the first guiding portion 231 to further reduce the insertion resistance between the insertion rod 10 and the positioning assembly 20, thereby improving the insertion smoothness.

Specifically, the first guide 231 and the second guide 232 are annular inclined surfaces extending circumferentially around the axis of the positioning unit 20, and preferably, circular truncated cone side surfaces inclined with respect to the axis of the positioning unit 20 and contacting each other when they are fitted to each other. The inclination trend of the two is as follows: the outer diameter of the first guide 231 or the second guide 232 away from the first sleeve 210 is smaller than the outer diameter of the first sleeve 210, that is, the outer diameter of the first guide 231 or the second guide 232 decreases along the insertion direction of the plunger 10 into the positioning assembly 20; the inclination angle of the annular inclined plane relative to the axis of the inserted link 10 is 5-80 degrees, and the preferred inclination angle range is 15-75 degrees.

With the arrangement, the first guide part 231 and the second guide part 232 can be in sliding contact with each other, so that the frictional resistance between the positioning assembly 20 and the end part of the inserted link 10 can be remarkably reduced, the abrasion degree between the positioning assembly 20 and the inserted link 10 is reduced, and the inserting and fixing efficiency between the inserted link 10 and the positioning assembly 20 is higher; in addition, the first guide 231 and the second guide 232 are in sufficient contact when being matched with each other, so that the pressing force between the end of the plunger 10 and the positioning assembly 20 can be dispersed and uniformly borne, and the abrasion of the contact area between the end of the plunger 10 and the positioning assembly 20 is avoided.

Furthermore, the first guiding portion 231 is located inside the end opening of the positioning seat 21 close to the first sleeve 210, the second guiding portion 232 is located at the end of the plunger 10 away from the first sleeve 210, the first guiding portion 231 is connected to the second matching portion 216, and the second guiding portion 232 is connected to the first matching portion 122.

With such an arrangement, when the guiding insertion of the insertion rod 10 is completed by the first guiding portion 231, the first matching portion 122 can be matched and fixed with the second matching portion 216, so that the guiding insertion step and the matching fixing step are closely connected in the insertion process of the insertion matching component 100, thereby further improving the docking efficiency of the insertion matching component 100.

Preferably, the first guide portion 231 and the second mating portion 216 smoothly transition. When the insertion of the plunger 10 and the positioning assembly 20 is completed, the first engaging portion 122 and the second engaging portion 216 can be smoothly engaged with each other with a low resistance, so as to smoothly start the step of engaging and fixing the plunger 10 and the positioning assembly 20.

In one embodiment, the peripheral wall of the first latch closest to the insertion start point of the spindle 10 is disposed obliquely to the axis of the spindle 10 and forms a guide surface which is substantially in the form of an annular truncated cone side surface, the outer diameter dimension of which decreases in a direction away from the first sleeve 210.

With the arrangement, in the process of applying force to the insert rod 10, the guide surface can drive the first latch closest to the insertion starting point to quickly pass through the plurality of second latches close to the first sleeve 210, so that the insert rod 10 moves to the insertion limit position of the first groove 123 as soon as possible, and is finally fully meshed and fixed with the positioning component 20.

Further, the length of the socket 12 in the axial direction of the plunger 10 is 1 to 20 times the length of the connecting portion 11 in the axial direction of the plunger 10.

In one embodiment, the positioning assembly 20 is provided with a mounting structure thereon that facilitates the use of an external tool by a constructor to mount the positioning assembly 20 within the second sleeve 220. Through the clamping or holding of the mounting structure by an external tool, a constructor can apply fastening force to the positioning component 20 more conveniently, the mounting convenience of the positioning component 20 is improved, and the time required for mounting the positioning component 20 in the second sleeve 220 is saved. The mounting structure includes several forms, such as mounting holes or mounting portions.

Please refer to fig. 1 to 5 again. Specifically, the end of the positioning seat 21 relatively close to the first sleeve 210 is provided with a mounting hole 215 in a polygonal shape, and the mounting hole 215 is preferably an inner hexagonal hole or an inner octagonal hole, and can form a rotation-stop tight fit with a conventional external tool, so that a constructor can manipulate the external tool to apply a holding force to the inner wall of the mounting hole 215. Of course, the mounting hole 215 may be a polygonal hole having another shape as long as an external tool can be fitted to the inner wall surface of the mounting hole 215 in a rotation-locking manner.

Further, the outer circumferential wall of the expanding portion 222 is provided with a mounting portion 212 having a polygonal prism structure, and the mounting portion 212 preferably has an outer hexagonal or octagonal structure, and can form a rotation-stop tight fit with a conventional external tool, so that a constructor can manipulate the external tool to apply a clamping force to the outer circumferential wall of the mounting portion 212. Of course, the mounting portion 212 may have a polygonal prism structure with other shapes, as long as the external tool can form a rotation-stop tight fit with the outer peripheral wall of the mounting portion 212.

Please refer to fig. 6 and fig. 12 again. In one embodiment, the opening portion 222 is provided with a second groove 223, and the second groove 223 extends along the axial direction of the second sleeve 220, so that a space allowance for the opening portion 222 to be deformed in a concave manner in the axial direction is formed. When the expanding portion 222 extends into the first groove 123, the expanding portion 222 can be radially contracted and reduced in radial size by virtue of the second groove 223.

So set up, under the relative extrusion of inserted bar 10, second recess 223 can allow the portion 222 that struts to radially shrink in order to reduce radial dimension, can further reduce the resistance that the portion 222 that struts inserts in first recess 123 to reduce the degree of difficulty that the portion 222 that struts fully pegs graft in first recess 123, so that realize pegging graft cooperation subassembly 100's abundant grafting fast and fix, and improve its butt joint efficiency.

Preferably, please refer to fig. 10. In one embodiment, the radial dimension of the second groove 223 decreases in the insertion direction of the insert rod 10.

So set up, the wall thickness size of portion 222 that struts increases along the direction of keeping away from inserted bar 10 relatively, and at the in-process of the first recess 123 of portion 222 grafting that struts, the deformation volume that the portion 222 radially contracts that struts reduces along the direction of keeping away from inserted bar 10, and the contact pressure between the inner wall of portion 222 and first recess 123 that struts increases, is favorable to making inserted bar 10 along the deformation that radially outwards expands and strut more abundant, and then guarantees fully to cooperate fixedly between first cooperation portion 122 and the second cooperation portion 216.

It will be appreciated that in other embodiments, the radial dimension of the second groove 223 may be constant, as shown in FIG. 4, or may increase in the direction of insertion of the plunger 10.

Please refer to fig. 6 again. In one embodiment, the second groove 223 is a blind groove, and the elastic filling structure 52 is disposed in the second groove 223, and the blind groove facilitates the compaction of the elastic filling structure 52 and prevents the elastic filling structure 52 from being removed from the second groove 223.

By such arrangement, the elastic filling structure 52 can deform along with the radial contraction of the opening part 222, and applies elastic supporting force to the inner wall surface of the second groove 223, so that the contraction process of the opening part 222 in plugging is ensured to be more moderate, and the material of the opening part 222 is prevented from breaking and failing due to sudden change of the radial dimension of the opening part 222.

Preferably, the elastic filling structure 52 is a rubber structure, and the elastic filling structure 52 is fixed in the second groove 223 by gluing. Due to the arrangement, the deformation capacity of the rubber structure is stronger, the abutting effect of the elastic deformation of the rubber structure on the inner wall of the second groove 223 is better, the contraction rate of the opening part 222 can be further reduced, and the material cannot be cracked due to the deformation of the rubber structure; the elastic filling structure 52 can be prevented from moving in the second groove 223 by gluing, and the fixing process is simple, low in cost and easy to implement.

Please refer to fig. 12 again. In one embodiment, a glue coating 2231 is disposed within the second groove 223. Specifically, when the glue layer 2231 is disposed in the second groove 223, the second groove 223 is a blind groove.

With such an arrangement, when the expanding portion 222 contracts and deforms, the glue coating 2231 in the second groove 223 can be squeezed and released, so as to be filled in a gap between the expanding portion 222 and the first groove 123, that is, the glue coating 2231 in the second groove 223 can be filled in a space between the second groove 223, the inner wall of the first groove 123 and the outer peripheral wall of the expanding portion 222 and can adhere to the expanding portion 222 and the inserted rod 10 at the same time, and further, the strength of the fixed connection between the inserted rod 10 and the expanding member 22 is improved.

Further, in an embodiment not shown in the drawings, the spreading portion 222 includes a plurality of sheet-like structures having a gap therebetween, and the plurality of sheet-like structures are disposed around the axis of the spreading portion 222 and form the second groove 223. With the arrangement, the plurality of mutually-spaced sheet structures enable the spreading portion 222 to form a structure similar to a fin, so that the deformation capacity and the maximum deformation of the spreading portion 222 can be further improved, and the contraction effect of the spreading portion 222 is remarkable in the process of inserting the inserted rod 10 into the spreading portion 222; in addition, the efficiency of the contraction deformation of the opening part 222 can be improved, so that the quick contraction is realized, the resistance of the insertion of the opening part 222 into the first groove 123 is reduced, and the insertion difficulty is reduced.

It is understood that in other embodiments, the expanding portion 222 may have other structures, for example, a side wall of the expanding portion 222 is provided with a lateral opening extending along the axial direction of the inserting rod 10, in this case, a projection shape of the expanding portion 222 on a radial plane is C-shaped, and the lateral opening can also improve the ability of the expanding portion 222 to shrink.

Please refer to fig. 1 to 6 and fig. 11 to 13 again. In one embodiment, a stop step 201 is disposed in the inner wall of the second sleeve 220, and the stop step 201 is used for stopping the depth of the positioning assembly 20 extending into the second sleeve 220.

Specifically, the inner diameter of the second sleeve 220 on the side relatively far from the first sleeve 210 is smaller than the outer diameter of the support portion 221, and the stop step 201 passes through the stop spreader 22 to achieve the axial positioning of the positioning assembly 20 in the second sleeve 220. When external construction equipment applies pressure to the insert rod 10, the stopper step 201 can support the spreader 22 so that the spreader 222 enters the first groove 123.

So set up, second sleeve 220 passes through backstop step 201 and restricts the axial position of locating component 20 in second sleeve 220, guarantees the relative position precision of inserted bar 10 and second sleeve 220, and then guarantees the assembly precision of first sleeve 210 and second sleeve 220.

Further, the outer diameter of the supporting portion 221 is larger than the inner diameter of the positioning seat 21, and the supporting portion 221 is located in the second sleeve 220 through the stopping step 201 and the positioning seat 21.

So set up, positioning seat 21 and backstop step 201 synergism are injectd the supporting part 221 in the clearance between positioning seat 21 and backstop step 201 to realize expanding support piece 22 along the two-way backstop limiting displacement of second sleeve 220 axial.

Furthermore, when the second boss 211 abuts against the second sleeve 220, the distance between the positioning seat 21 and the stopping step 201 is greater than the height of the supporting portion 221, that is, the supporting portion 221 can move in the gap defined by the positioning seat 21 and the stopping step 201 along the axial direction, so that the expanding member 22 can be movably accommodated in the second sleeve 220.

So set up, thereby can prevent that supporting part 221 from contacting positioning seat 21 and leading to the unable butt of second boss 211 to be close to the tip of first sleeve 210 in second sleeve 220, backstop step 201 and second sleeve 220 have formed the space that can supply positioning seat 21 fully to stretch into second sleeve 220 between the tip, and still leave the activity space surplus, so that positioning seat 21 does not receive the influence of supporting part 221 when second boss 211 butt second sleeve 220, avoid positioning seat 21 can't fully stretch into in the second sleeve 220.

Please refer to fig. 1, 5 to 6 again. In one embodiment, one of the supporting portion 221 and the stopping step 201 or the supporting portion 221 and the positioning seat 21 is provided with the first flexible member 41, and the other is provided with the second flexible member 42.

Specifically, the first flexible member 41 is disposed between the supporting portion 221 and the stopping step 201, and the second flexible member 42 is disposed between the supporting portion 221 and the positioning seat 21. The first flexible member 41 is fixedly disposed on one side of the supporting portion 221 relatively close to the stopping step 201, and the second flexible member 42 is fixedly disposed on one side of the supporting portion 221 relatively close to the positioning seat 21.

It can be understood that the first flexible member 41 can also be fixedly disposed on the side of the stopping step 201 close to the supporting portion 221, and the second flexible member 42 can also be fixedly disposed on the side of the positioning seat 21 close to the supporting portion 221.

So set up, first flexible 41, second flexible 42 can play the effect to supporting part 221 buffering shock attenuation jointly in supporting part 221 both sides to further reduce backstop step 201 or positioning seat 21 to expand the impact effect of strutting piece 22, avoid because of supporting part 221 and backstop step 201 or positioning seat 21 direct rigid contact in the butt joint process of grafting cooperation subassembly 100 and grafting structure 200, so that expand strutting piece 22 can be stably and fully pegged graft with inserted bar 10, improve the compactness after the two combine.

Preferably, the first flexible component 41 and/or the second flexible component 42 are/is fixed to the supporting portion 221 by gluing. The gluing and fixing mode is more convenient to operate and lower in cost.

Further, the first flexible element 41 and/or the second flexible element 42 are annular, and the thickness of the first flexible element 41 and/or the second flexible element 42 is 0.5cm to 5 cm. The annular flexible part is more conveniently set up in the contact site of supporting part 221 and backstop step 201 to and the contact site of supporting part 221 and positioning seat 21, and the material utilization of flexible part is high, and the material thickness of flexible part has suitable shrink deformation range, and buffering shock attenuation effect is showing, and the space volume that occupies is little.

Preferably, the thickness of the first flexible material 41 and/or the second flexible material 42 is 1mm to 2 cm.

It is understood that, in other embodiments, the number of the first flexible components 41 and/or the second flexible components 42 may also be multiple, and the multiple first flexible components 41 and/or the multiple second flexible components 42 are arranged on two sides of the supporting portion 221 around the axis of the supporting portion 221.

Please refer to fig. 13 again. In one embodiment, the stopping step 201 is an annular concave surface, the concave direction of the stopping step faces to one end of the second sleeve 220 away from the first sleeve 210, a third protrusion 213 is disposed on one side of the supporting portion 221 relatively away from the expanding portion 222, and the third protrusion 213 can be accommodated in the annular concave surface.

So set up, through annular concave surface and the protruding 213 cooperation of third between backstop step 201 and the supporting part 221, realized the radial positioning effect to supporting part 221, still further increased the area of contact between backstop step 201 and the supporting part 221 simultaneously so that expand piece 22 and the laminating between the backstop step 201 more stable, can restrict expand piece 22 and radially rock for second sleeve 220.

In some embodiments, the plug-fit assembly 100 further includes an elastic member 51, and the elastic member 51 is accommodated in the second sleeve 220, is located on a side of the expanding member 22 relatively far from the positioning seat 21, and can elastically act on the expanding member 22. In the process of inserting the expanding member 22 into the inserted link 10, the elastic member 51 can buffer and absorb shock for the expanding member 22, so as to prevent the inner wall of the first groove 123 from impacting the expanding member 22 and further causing the expanding member 22 to generate strength damage; in addition, the elastic action of the elastic member 51 on the expanding member 22 can drive the expanding member 22 to be fully inserted into the first groove 123.

Specifically, the embodiments of the elastic member 51 include the following two aspects.

Please refer to fig. 13 and fig. 17 again. In the first solution, the inner wall surface of the second sleeve 220 forms a stopping step 201 for stopping the supporting portion 221 of the expanding member 22, and the elastic member 51 is disposed between the supporting portion 221 and the stopping step 201, that is, the supporting portion 221 indirectly abuts against the stopping step 201 through the elastic member 51.

By such arrangement, direct rigid contact between the expanding piece 22 and the stopping step 201 can be avoided, and strength damage caused after the expanding piece 22 is extruded by the stopping step 201 is prevented.

Preferably, the elastic member 51 is an elastic washer having a diameter larger than an inner diameter of a side of the stopping step 201 away from the first sleeve 210, and the stopping step 201 stops the elastic washer. So set up, elastic component 51 both ends compress tightly respectively in expanding support piece 22 and backstop step 201, can expand the impact force that support piece 22 received through producing along expanding support piece 22 axial shrinkage deformation buffering, and the shock attenuation effect and the durability of elastic washer are better.

Furthermore, the elastic washer is provided with a gap and is approximately in a C-shaped structure, and two end parts of the elastic washer at two sides of the gap are positioned on different radial planes; the elastic washer is preferably made of metal.

With the arrangement, the two end parts of the C-shaped elastic washer at the two sides of the notch form a height difference in the axial direction of the expanding part 22, so that the elastic washer has the axial telescopic deformation capacity similar to that of a telescopic spring, can bear larger pressure from the expanding part 22 and the stop step 201, has better deformation capacity and larger deformation amount, and obviously improves the buffer and shock absorption effects on the expanding part 22; the elastic washer made of metal materials has better bearing and deformation capacity, higher durability and service life, higher material strength and difficult fracture failure.

Please refer to fig. 2 to 5 and fig. 11 again. In the second embodiment, the elastic member 51 is a spring, and the inner wall surface of the second sleeve 220 is provided with a contraction opening 250 for abutting against the upset 240 of the reinforcing steel bar 230; both ends of the elastic member 51 are respectively abutted against the inner wall surface of the contraction opening 250 and the supporting portion 221 of the expansion member 22. Specifically, the elastic member 51 may be a linear expansion spring having a certain elastic coefficient, a tower spring having an elastic coefficient that can be changed according to the amount of expansion, or other types of buffer members, such as a shock-absorbing sleeve.

So set up, the arrangement of elastic component 51 in second sleeve 220 is simpler, realize easily, and is favorable to choosing for use expanding spring to realize expanding the buffering shock attenuation of strutting piece 22, and expanding spring's deformation scope is bigger, and the elastic effect is showing, and durability and fatigue resistance can be high.

It is understood that in other embodiments, a spring may also be disposed between the supporting portion 221 and the stopping step 201, so as to achieve the effects of buffering and damping the expanding portion 22 and driving the expanding portion 222 to be fully inserted into the first groove 123.

In one embodiment, a glue layer 2231 is provided between the plunger 10 and the positioning assembly 20. The glue coating 2231 adheres to the inserted bar 10 and the positioning component 20 at the same time to further ensure the reliability of the inserted and connected matching component 100 after butt joint and fixation, and the glue coating 2231 can also fill the gap between the inserted bar 10 and the positioning component 20 to prevent the inserted and connected matching component 100 and the inserted and connected structure 200 from stress instability, which is beneficial to long-term reliable service. Specifically, glue layers 2231 are disposed between the inserted link 10 and the expanding member 22, and between the inserted link 10 and the positioning seat 21.

Optionally, referring to fig. 1, the first groove 123 may also be filled with an adhesive layer 2231. When the expanding portion 222 is inserted into the first groove 123, the rubber layer 2231 is extruded by the expanding portion 222 and the inner wall of the first groove 123 together, and is filled between the inserted rod 10 and the supporting portion 221, and in the gap between the inserted rod and the positioning seat 21.

Please refer to fig. 1 and fig. 11 again. The first gap 24 is formed between the positioning seat 21 and the expanding member 22, and the distance between the positioning seat 21 and the stopping step 201 in the axial direction of the second sleeve 220 is greater than the axial height of the supporting portion 221 of the expanding member 22, so that the first gap 24 is formed on the side of the end of the positioning seat 21, which is relatively close to the first sleeve 210, and the supporting portion 221. The first gap 24 is filled with a glue layer 2231.

With this arrangement, the rubber-coated layer 2231 in the first gap 24 adheres to the expansion piece 22 and the positioning seat 21 at the same time, so that the positioning seat 21 and the expansion piece 22 are further fixed relatively and form the positioning assembly 20 of an integral structure, and the inserted and fixed inserted rod 10 is better kept fixed relative to the positioning seat 21. Alternatively, the adhesive layer 2231 may be a paste adhesive, a two-liquid mixed hardened adhesive, an adhesive whose main component includes epoxy resin, or a structural adhesive or a bar-planting adhesive.

Please refer to fig. 1 to 6 and fig. 11 to 12 again. In one embodiment, at least one through hole 224 is formed on the supporting portion 221 of the expanding member 22, and the through hole 224 penetrates through a gap between the supporting portion 221 and the insert rod 10 and a space between the supporting portion 221 and the upset 240 of the reinforcing bar 230 accommodated in the second sleeve 220.

By such arrangement, the through hole 224 forms a passage through which the inserted rod 10 and the expanding member 22, and the glue layer 2231 between the inserted rod 10 and the positioning seat 21 pass and enter one side of the supporting portion 221 close to the upset head 240, so that after the inserted rod 10 and the positioning assembly 20 are fully inserted, the glue layer 2231 respectively fills a gap between the supporting portion 221 and the inserted rod 10, and a space between the supporting portion 221 and the upset head 240 in the second sleeve 220, and drainage of the precast pile connecting mechanism after steam curing treatment is facilitated, and moisture passing and evaporation are accelerated.

It should be noted that, when the elastic member 51 is disposed between the expansion member 22 and the contraction opening 250, the through hole 224 may not be disposed on the supporting portion 221, and at this time, the glue layer 2231 is filled in the gaps between the inserted link 10 and the supporting portion 221 and between the inserted link 10 and the positioning seat 21, so that the elastic member 51 will not be subjected to the resistance of the glue layer 2231 during the expansion deformation, thereby ensuring the normal service of the elastic member 51.

Preferably, the number of the through holes 224 is multiple, and the multiple through holes 224 surround the axis of the expander 22 and are uniformly distributed on the support portion 221, so that the material of the rubber coating 2231 between the expander 22 and the plunger 10 can uniformly flow into one end of the support portion 221 near the upset 240 of the steel bar 230.

The principle of the plug-in fixing of the plug-in mating assembly 100 of the present invention is as follows: when the insert rod 10 is inserted into the insertion space 214 of the positioning seat 21, the expanding portion 222 enters the first groove 123, and exerts a supporting force on the inner wall surface of the first groove 123, so that the insert rod 10 is expanded and deformed outward in the radial direction, and the outer diameter of the insert portion 12 is increased until the first matching portion 122 matches with the second matching portion 216. In brief, the expanding portion 222 expands the inserting portion 12 to generate an outward expansion deformation of the inserting rod 10, which can be fixed in cooperation with the positioning component 20.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims

1. The plug-in structure is characterized by comprising a first sleeve (210), a second sleeve (220), an inserted bar (10), a positioning seat (21), an elastic piece (51) and a spreading piece (22), wherein the inserted bar (10) is fixedly connected to the first sleeve (210), and the inserted bar (10) is provided with a first groove (123) extending along the axial direction; a first clamping tooth group (1221) is convexly arranged on the outer peripheral wall of the inserted rod (10), and a second clamping tooth group (2161) is arranged on the positioning seat (21); the elastic piece (51), the positioning seat (21) and the expanding piece (22) are all accommodated in the second sleeve (220), and the positioning seat (21) is fixedly connected to the second sleeve (220); the expanding piece (22) is positioned in the second sleeve (220) through the positioning seat (21), and the expanding piece (22) can move in the second sleeve (220) along the axial direction; the elastic piece (51) is positioned on one side of the expanding piece (22) opposite to the positioning seat (21) and can elastically act on the expanding piece (22);

the inserted bar (10) can extend into the positioning seat (21), and the expanding piece (22) can extend into the first groove (123) and expand the inserted bar (10), so that the first clamping tooth group (1221) and the second clamping tooth group (2161) are meshed with each other.

2. The plugging structure according to claim 1, wherein a stopping step (201) is disposed in the second sleeve (220), the expanding member (22) is movably disposed between the positioning seat (21) and the stopping step (201), and the expanding member (22) can elastically abut against the positioning seat (21) under the action of the elastic member (51).

3. The plug-in connection according to claim 2, characterized in that the elastic element (51) is an elastic washer, the diameter of which is greater than the inner diameter of the stop step (201), the stop step (201) being able to stop the elastic washer.

4. Plug structure according to claim 3, characterized in that said elastic element (51) is a metal element, said elastic washer is C-shaped and the two ends of said elastic washer are located in different radial planes.

5. The plugging structure according to claim 2, wherein the expanding member (22) comprises a supporting portion (221) and an expanding portion (222), an outer diameter of the supporting portion (221) is larger than an inner diameter of the stopping step (201) and an inner diameter of the positioning seat (21), and the supporting portion (221) is positioned in the second sleeve (220) through the stopping step (201) and the positioning seat (21); the opening part (222) can extend into the first groove (123) and open the inserted bar (10), and the first clamping tooth group (1221) and the second clamping tooth group (2161) are matched and fixed;

the elastic member (51) includes a first flexible member (41), and the first flexible member (41) is disposed between the support portion (221) and the stopper step (201).

6. Plug structure according to claim 5, characterized in that it further comprises a second flexible element (42), said second flexible element (42) being arranged between said support (221) and said positioning seat (21).

7. The plug connection structure according to claim 6, wherein the first flexible member (41) is fixedly arranged on a side of the support portion (221) relatively close to the stop step (201); and/or the presence of a catalyst in the reaction mixture,

the second flexible piece (42) is fixedly arranged on one side, close to the positioning seat (21), of the supporting part (221); and/or the presence of a catalyst in the reaction mixture,

the first flexible part (41) and/or the second flexible part (42) are/is fixed on the supporting part (221) by gluing; and/or the presence of a catalyst in the reaction mixture,

the first flexible element (41) and/or the second flexible element (42) are annular; and/or the presence of a catalyst in the reaction mixture,

the thickness of the first flexible element (41) and/or the second flexible element (42) is 0.5cm to 5 cm.

8. The plug structure according to claim 1, characterized in that the end of the second sleeve (220) opposite to the first sleeve (210) is provided with a constriction (250), the constriction (250) is used for connecting a reinforcing bar (230), and the elastic member (51) is a spring abutting against the inner wall of the constriction (250).

9. The plug structure according to claim 1, wherein the plug rod (10) comprises a connecting portion (11) and a plug portion (12) connected to each other, the connecting portion (11) is used for being connected with the first sleeve (210), the plug portion (12) comprises a plurality of fins (121), the plurality of fins (121) surround and form the first groove (123), and the plurality of fins (121) can move away from each other under the action of the expanding member (22) to enable the first set of snap teeth (1221) and the second set of snap teeth (2161) to be meshed with each other.

10. The utility model provides a precast pile coupling mechanism, its characterized in that includes two piece at least precast building piles and grafting structure, grafting structure be any one of claim 1 ~ 9 grafting structure, first sleeve (210) with second sleeve (220) set firmly respectively in two precast building piles, two precast building piles pass through grafting structural connection.