CN114592501A - Grafting structure and precast pile coupling mechanism - Google Patents

Abstract

The invention provides an insertion structure and a precast pile connecting mechanism, wherein the insertion structure comprises a first sleeve, a second sleeve and an insertion rod, and the insertion rod is fixedly connected to the first sleeve; the outer peripheral wall of the inserted rod is convexly provided with a first matching part, and the inserted rod is provided with a first groove extending along the axis direction; be equipped with in the second sleeve and strut the portion, be provided with second cooperation portion on the telescopic internal perisporium of second, the inserted bar can stretch into the second sleeve, struts the portion and can stretch into first recess and strut the inserted bar to it is fixed with the cooperation of second cooperation portion to make first cooperation portion.

Description

Insertion structure and precast pile connecting mechanism

Technical Field

The invention 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, and the quick butt joint component is respectively connected with axial reinforcing steel bars in the two prefabricated pile connecting mechanisms and can be mutually spliced to form non-detachable fixed connection.

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

Disclosure of Invention

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

The invention provides an insertion structure which comprises a first sleeve, a second sleeve and an insertion rod, wherein the insertion rod is fixedly connected to the first sleeve; the outer peripheral wall of the inserted rod is convexly provided with a first matching part, and the inserted rod is provided with a first groove extending along the axis direction; the second sleeve is internally provided with a strutting portion, the inner peripheral wall of the second sleeve is provided with a second matching portion, the inserted bar can stretch into the second sleeve, the strutting portion can stretch into the first groove and strut the inserted bar, and the first matching portion is matched and fixed with the second matching portion.

In one embodiment of the invention, the spreader portion is formed separately from the second sleeve and is fixedly connected thereto.

So set up, the part of strutting that the components of a whole that can function independently takes shape can produce alone with the second sleeve, is convenient for select respectively according to the in-service use demand and props the material or the processing technology of part and second sleeve, can reduce the processing degree of difficulty of single part simultaneously, the manufacturing cost reduction of grafting structure.

In one embodiment of the invention, a first clamping tooth group extending along the axial direction is arranged on the outer peripheral wall of the inserted rod and forms a first matching part, and a second clamping tooth group matched with the first clamping tooth group is arranged on the inner peripheral wall of the second sleeve and forms a second matching part; the opening portion can extend into the first groove and open the inserted rod, so that the first clamping tooth group and the second clamping tooth group are meshed with each other.

So set up, be connected through the tooth meshing cooperation between inserted bar and the second sleeve, can guarantee the stability of the two after fixing, can combine into whole and can not the relative slip more closely, avoid leading to fixed inefficacy, be favorable to improving the durability of grafting structure.

In one embodiment of the invention, the radial dimension of the distracting portion increases gradually in the insertion direction of the plunger.

So set up, along with the degree of depth increase that the portion of strutting inserted first recess, the deformation volume that the inserted bar expands along radial outside increases, and the portion of strutting expands the increase of supporting power that the internal face of portion applied to first recess, and the inserted bar deformation is more abundant, therefore makes the cooperation between inserted bar and the second sleeve fixed more abundant, is favorable to improving the telescopic fixed effect of inserted bar and second.

In one embodiment of the present invention, the radial dimension of the first groove gradually increases in the insertion direction of the insert pin, and the spreading portion matches the dimension of the first groove.

So set up, the shape of the portion of strutting and the accommodation space shape looks adaptation of first recess, the portion of strutting can form the stable laminating state between the inner wall of first recess, is favorable to improving the overall stability of grafting structure.

In one embodiment of the invention, the inserted rod comprises a plurality of fins which surround and form a first groove, and the first matching part is positioned on the outer peripheral wall of each fin; the opening part can extend into the first groove and enable the fins to be away from each other, so that the first matching part and the second matching part are matched and fixed.

So set up, at the inserted bar with the second sleeve grafting in-process, the portion of strutting makes a plurality of fins produce along the radial deformation that expands outward of inserted bar, the setting of a plurality of fins has further improved the deformability of inserted bar under the extrusion of the portion of strutting, has reduced the inserted bar and has become the probability that produces the intensity destruction when becoming.

In one embodiment of the invention, the plunger is provided with a third guide portion at an end of the first recess opposite to the end remote from the first sleeve, the third guide portion being adapted to guide the plunger into the first recess.

So set up, the third guide part can reduce first recess opening edge and strut the grafting resistance between the portion tip, plays the effect to the portion direction of strutting and centering, drives the portion of strutting and improves the axiality of the portion of strutting and first recess when pegging graft in first recess fast, thereby reduces the grafting degree of difficulty and improves grafting efficiency, avoids strutting the portion for first recess incline and then leads to the uneven damage of fin atress.

In one embodiment of the invention, at least part of the expansion part has elasticity, and the expansion part can elastically contract in the radial direction under the extrusion of the inner wall of the first groove.

With the arrangement, when the opening part is inserted into the first groove, the elastic part on the opening part can radially apply outward extrusion force to the inner wall of the first groove contacted with the opening part, so that the elastic contraction part of the opening part is more tightly attached to the inner wall of the first groove, and the integral stability of the splicing structure is improved; in addition, the elastic part of the strutting part can buffer the impact force of the inner peripheral wall of the first groove, prevent the strutting part from generating strength damage and prolong the service life of the inserting structure.

In one embodiment of the invention, an elastic layer is arranged outside at least part of the strutting part, and the elastic layer can elastically contract in the radial direction under the extrusion of the inner wall of the first groove.

With the arrangement, under the joint extrusion action of the opening part and the inner wall of the first groove, the elastic layer can respectively apply extrusion force to the opening part and the inner wall of the first groove, so that the elastic layer, the opening part and the inner wall of the first groove are more tightly attached, and the integral stability of the plug-in matching assembly is improved; in addition, the elastic layer is arranged outside the opening part more simply and is easier to realize, and the manufacturing cost of the plug-in structure can be reduced.

In one embodiment of the invention, the peripheral wall of the plunger is provided with at least one marking for identifying the depth of insertion of the plunger into the second sleeve.

So set up, set up the mark at the inserted bar periphery wall and can demonstrate the position of inserted bar in the second sleeve more directly perceivedly, can clearly will peg graft the cooperation subassembly butt joint condition and feed back to the site operation personnel in order to present the form of the relative position information between second sleeve and the mark to improve the intuitiveness, the convenience of construction operation, be favorable to improving the efficiency of construction.

In one embodiment of the invention, the markings comprise graduations which are distributed in the axial direction of the plunger.

So set up, the distance between the scale can correspond with the inserted bar depth of inserting in the second sleeve, can accurately reflect the inserted bar through the scale and insert the depth in the second sleeve.

In one embodiment of the invention, the indicia comprises a number.

So set up, be convenient for mark the scale for the grafting degree of depth of inserted bar in the second sleeve to make the inserted bar more directly perceived more clear at the deep information of inserting in the second sleeve.

In one embodiment of the invention, the indicia is a ring.

So set up, the mark can be seen at arbitrary radial position of inserted bar, makes things convenient for the job site personnel in time to learn the butt joint condition of grafting cooperation subassembly.

The invention 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 invention, the peripheral wall of the splicing rod is deformed through the opening part so as to be matched and fixed with the second sleeve, so that the first sleeve and the second sleeve are fixedly connected, the connection strength after the splicing structure is butted and the bearing limit performance of the splicing structure on lateral shearing or impact can be improved, and the splicing structure is not easy to shake or strength damage. Therefore, the stability of the spliced structure after butt joint is better, and the spliced structure can be used for reliably and fixedly butting an external structure, such as a prefabricated building pile.

Drawings

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

FIG. 2 is a schematic view of the assembly of the plugging structure according to the 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, fragmentary schematic view of another embodiment of the plug-in structure of FIG. 1 at B;

FIG. 5 is a schematic illustration of a bayonet according to a first embodiment of the present invention;

FIG. 6 is a schematic view of a second embodiment of a plunger according to the present invention;

FIG. 7 is a schematic view of a bayonet according to a third embodiment of the present invention;

fig. 8 is a schematic structural view of an insert rod according to a fourth embodiment of the present invention.

Description of reference numerals:

100. a plug-in mating assembly; 10. a rod is inserted; 11. a connecting portion; 111. a first boss; 12. a plug-in part; 121. a fin; 122. A first fitting portion; 1221. a first set of teeth; 123. a first groove; 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 latch set; 22. expanding the support piece; 221. a support portion; 222. a distraction section; 231. a first guide portion; 232. a second guide portion; 24. a first gap; 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 apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. 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.

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

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 an embodiment of the present invention, the inserting and connecting assembly 100 and the inserting and connecting structure 200 are used for connecting two prefabricated building piles, and it is understood that in other embodiments, the inserting and connecting assembly 100 and the inserting and connecting structure 200 can also be used for butt-jointing and fixing other types of prefabricated pile connecting mechanisms, which is not described in detail herein.

The plug-in matching component 100 provided by the invention comprises a plug rod 10 and a positioning component 20, wherein a plug-in space 214 into which the plug rod 10 can extend and plug in is arranged in the positioning component 20, and the plug 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 invention 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 the insertion connection 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, and are coaxially arranged to form an accommodating space for accommodating the installation of the splicing matching component 100; an end of the first sleeve 210 facing away from the second sleeve 220, and an end of the second sleeve 220 facing away from the first sleeve 210 are respectively connected to the axial rebars 230 of the two prefabricated building piles.

Please refer to fig. 1 to 6. 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 heading 240 and a second channel for the steel bar to pass through at two axial ends of the constriction 250, and the inner diameter of the constriction 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 4 again, and refer to fig. 5 to 8. In one embodiment, the insert rod 10 includes a connecting portion 11 and an insert portion 12, which 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 insertion part 12 is further provided with a first matching part 122 for matching and fixing with the positioning component 20, the inner peripheral wall of the positioning component 20 is correspondingly provided with a second matching part 216 matched with the first matching part 122, and the insertion rod 10 is further internally provided with a first groove 123 extending along the axial direction of the insertion 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 fixation, welding fixation, and tight fitting fixation, but not limited to threaded fixation.

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 disposed on the positioning assembly 20 and then fixedly attached to the inner wall of the second sleeve 220, the second mating portion 216 is substantially identical in structure and in use.

Further, 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 thereof 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 connecting portion 11 extending into the first sleeve 210, and can limit the depth of the plugging portion 12 extending into the positioning component 20 or the depth of the plugging portion 12 extending into the second sleeve 220.

Please refer to fig. 1 to 4 again. In one embodiment, the positioning assembly 20 includes a positioning base 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 protruded from 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 211 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 be convenient and in time learn that inserted bar 10 and positioning seat 21 have formed reliable meshing fixed for the butt joint condition of grafting 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 an arc shape or an elliptic arc shape.

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 conveniently peg graft the assembly of cooperation subassembly 100.

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 insert 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 and the second sleeve 220 can be formed in a split mode and fixed in a welding mode; 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 8 again. The plug-in matching assembly and the plug-in structure provided by the invention 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 can 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 opposite to 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 separately molded, and the supporting portion 221 of the expanding member 22 is connected with the positioning seat 21 by screw, welding, gluing or interference. So set up, positioning seat 21 and expand the piece 22 and can process respectively and realize relative fixed connection, and the fixed connection of supporting part 221 and positioning seat 21 easily realizes and the good reliability, has improved the axiality after inserted bar 10 and positioning seat 21 are pegged graft fixedly.

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 fixed to the inner peripheral wall of the positioning seat 21 by screw thread, tight fit, or glue, or fixed to the inner wall surface of the second sleeve 220 by tight fit or glue, as long as the expanding portion 22 can be fixed 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 so as to facilitate the insertion of the insertion rod 10.

When the inserting and connecting assembly 100 is inserted and fixed, and after the inserting and connecting structure 200 in the fixed state of butt joint is formed by installing the first sleeve 210 and the second sleeve 220, the first sleeve 210, the inserted bar 10, the positioning seat 21, the expanding piece 22 and the second sleeve 220 are all coaxially arranged, and are coaxially arranged with the axial reinforcing steel bar 230 in the prefabricated building pile connected with the first sleeve 210 and the 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.

With the arrangement, the insertion rod 10 and the positioning component 20 are more reliably connected, the tight combination bearing limit is higher, and the stability of the insertion matching component 100 after butt joint and fixation 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-engaging 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, the inserted link 10 and the positioning assembly 20 are firmly meshed and fixed, the inserted link 10 and the positioning assembly 20 are not easy to separate or slip off under the action of external force, and the fixing 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 ensured.

It should be noted that, the first latch group 1221 and the second latch group 2161 are engaged and fixed, and are not limited by the number of the latches in which the first latch and the second latches are engaged one-to-one, and not limited by the shape of the first latch matching the shape of the second latch tooth socket, as long as the two are engaged and the inserted link 10 and the positioning component 20 can be kept fixed relatively reliably. 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. 8. 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 is a height difference between the tooth top of the first latch and the tooth groove adjacent to the tooth top in the radial direction of the inserted link 10. The dimension H in fig. 8 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 which 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. 6. In one embodiment, the number density of the first latches tends to decrease 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. 7. 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 a dimension of the first latch along the axial direction of the insert rod 10, and a dimension D in fig. 7 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 insertion rod 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 insertion rod 10 is fully 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 force 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 arranged with the axis of the insert rod 10 as the center.

Please refer to fig. 5 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 the fixed basis of positioning seat 21 meshing, 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 drawn in the insertion direction of the insertion rod 10, as shown in fig. 6 to 8, 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. 5-8 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 group 1221 or the second latch group 2161 facing away from the first guiding portion 13, and the first blocking portion 15 can block the plunger 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 the first latch on the side far away from the first sleeve 210, and the first stopping portion 15 is an annular or arc-shaped inclined surface on the first latch on the side far away from the second sleeve 220; the second guiding portion 14 is an annular inclined surface on the second latch near 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 being cut along the axial direction of the plug-in mating component 100, the first stopping portion 15 on the inserted link 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 the root bottom of the 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 the opening portion 222 to center, so as to drive the opening portion 222 to be quickly inserted into the first groove 123, thereby improving the insertion efficiency, and preventing the opening portion 222 from being damaged due to uneven stress on the insertion portion 12 caused by the deflection of the first groove 123.

In one embodiment, the peripheral wall of the plunger 10 is provided with at least one marking for indicating 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 displayed by the mark on the peripheral wall of the inserted link 10, and the butt joint condition of the inserting and 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; the scale is 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 intuitive and clearer; 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 fitting 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; correspondingly, 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 inserting rod 10, which is expanded and 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 inserting rod 10 is deformed more sufficiently, and the inserting rod 10 and the positioning seat 21 are engaged 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 rod 10 is provided with a chamfer, the chamfer makes the surface shape of the end of the opening part 222 close to the inserted rod 10 passivated, so as to prevent the end of the inserted rod 10 from damaging the surface of the opening part 222, and the chamfer can also 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 rod 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 tip activity of supporting part 221 that forms of first recess 123 to just leave the space surplus, avoid when expanding strutting piece 22 moves about 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 expands strutting piece 22 and inserted bar 10 and peg graft, resistance when eliminating the two and peg graft.

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 is matched with the first guiding portion 231 to guide the insertion rod to extend into the positioning assembly 20.

The first guide portion 231 can reduce the insertion resistance when the insertion rod 10 starts to enter the positioning assembly 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 assembly 20 during insertion is improved, the centering performance of the insertion rod 10 and the positioning assembly 20 is further ensured, the low-resistance and quick butt joint of the insertion matching assembly 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 part 231 or the second guide part 232 away from the first sleeve 210 is smaller than the outer diameter of the first guide part 231 or the second guide part 232 close to the first sleeve 210, that is, the outer diameter of the first guide part 231 or the second guide part 232 decreases in the direction of inserting 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 insert rod 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 function 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, and the insertion efficiency of the insertion matching component 100 is further improved.

Preferably, the first guide portion 231 and the second mating portion 216 smoothly transition. When the guiding 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 and lowly engaged, 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.

So set up, at the in-process to the application of force of inserted bar 10, the guide face can drive the first latch that is closest to the insertion starting point and pass through a plurality of second latches that are close to first sleeve 210 fast to make inserted bar 10 move as early as possible to the grafting extreme position of first recess 123, finally with locating component 20 full meshing fixed.

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 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 4 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 hole, 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 tightly fitted to the inner wall surface of the mounting hole 215 in a rotation stop manner.

Further, be provided with the installation department 212 that is polygon prism structure on the portion 222 periphery wall that struts, installation department 212 preferably adopts outer hexagonal or outer eight corners structure, can form the tight fit of spline with conventional external instrument to the constructor manipulates external instrument in order to exert clamping-force to installation department 212 periphery wall. Of course, the mounting portion 212 may have a polygonal prism structure with other shapes as long as an external tool can form a rotation stop tight fit with the outer peripheral wall of the mounting portion 212.

Please refer to fig. 1 to 4 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 component 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 is used for stopping the expanding piece 22 so as to realize 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.

In one embodiment, the stopping step 201 is an annular concave surface, the concave direction of the stopping step is toward one end of the second sleeve 220 away from the first sleeve 210, one side of the supporting portion 221, which is relatively away from the expanding portion 222, is provided with a third protrusion 213, 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.

Please refer to fig. 1 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 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 radially expanded and deformed outwards, 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 embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be considered as being within the scope of the present specification as long as there is no such combination.

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 (12)

1. The plug structure is characterized by comprising a first sleeve (210), a second sleeve (220) and an insertion rod (10), wherein the insertion rod (10) is fixedly connected to the first sleeve (210); a first matching part (122) is convexly arranged on the peripheral wall of the inserted rod (10), and a first groove (123) extending along the axial direction is formed in the inserted rod (10);

be equipped with in second sleeve (220) and strut portion (222), be provided with second cooperation portion (216) on the internal perisporium of second sleeve (220), inserted bar (10) can stretch into second sleeve (220), strut portion (222) can stretch into in first recess (123) and strut inserted bar (10), so that first cooperation portion (122) with second cooperation portion (216) cooperation is fixed.

2. The plug connection according to claim 1, characterized in that the spreading portion (222) is formed separately from the second sleeve (220) and is fixedly connected thereto.

3. The plug structure according to claim 1, wherein a first set of latch teeth (1221) extending in the axial direction is provided on an outer peripheral wall of the plug rod (10) and forms the first fitting portion (122), and a second set of latch teeth (2161) cooperating with the first set of latch teeth (1221) is provided on an inner peripheral wall of the second sleeve (220) and forms the second fitting portion (216); the spreading part (222) can extend into the first groove (123) and spread the inserted bar (10) so as to enable the first clamping tooth group (1221) and the second clamping tooth group (2161) to be meshed with each other.

4. Plug-in structure according to claim 3, characterized in that the radial dimension of the spreading portion (222) increases progressively in the direction of insertion of the plug-in stem (10).

5. The plug-in connection according to claim 4, characterized in that the radial dimension of the first groove (123) increases gradually in the direction of insertion of the plug rod (10), and the spreader (222) matches the dimension of the first groove (123).

6. The plugging structure according to claim 1, wherein the plug rod (10) comprises a plurality of fins (121), the plurality of fins (121) surround and form the first groove (123), and the first mating portion (122) is located on an outer peripheral wall of the fins (121); the opening part (222) can extend into the first groove (123) and enable the plurality of fins (121) to be away from each other, so that the first matching part (122) and the second matching part (216) are matched and fixed.

7. Plug-in connection according to claim 6, characterized in that the plug rod (10) is provided with a third guide (16) at the end of the first groove (123) facing away from the first sleeve (210), the third guide (16) being intended to guide the plug rod (10) into the first groove (123).

8. The plug structure according to claim 1, characterized in that at least part of the spreading portion (222) is elastic, the spreading portion (222) being elastically contractible radially under the compression of the inner wall of the first groove (123).

9. Plug structure according to claim 8, characterized in that at least part of the struts (222) are externally provided with an elastic layer (30), the elastic layer (30) being elastically contractible radially under the pressure of the inner wall of the first recess (123).

10. The plug-in connection according to claim 1, characterized in that the peripheral wall of the plug rod (10) is provided with at least one marking for identifying the depth of the plug rod (10) extending into the second sleeve (220).

11. The splicing structure of claim 10, wherein the markings comprise graduations distributed along an axial direction of the plug rod; and/or the presence of a catalyst in the reaction mixture,

the mark is annular; and/or the presence of a catalyst in the reaction mixture,

the indicia includes a number.

12. 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 ~ 11 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.

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