CN209977002U - Self-adjusting double-end connecting piece - Google Patents

Abstract

The utility model relates to a self-adjusting double-end connecting piece, which comprises an inserting rod main body, wherein the two ends of the inserting rod main body are provided with inserting parts, the inserting parts of the inserting rod main body are connected with a clamping mechanism, and the clamping mechanism can be an elastic buckle clamping mechanism or a card locking mechanism; the joint of the plunger body and the clamping mechanism is provided with an offset clearance suitable for the self-adjustment of the plunger body. Inserting portion is connected fixed back with latch mechanism, through intermediate retaining member or intermediate locking piece and the interior lock nut threaded connection of tubular pile, when to the stake, rocks the regulation about the inserted bar main part and realizes effectively meeting the stake, and is convenient and firm to the stake.

Description

Self-adjusting double-end connecting piece

Technical Field

The utility model belongs to the technical field of the building technology and specifically relates to a self-interacting double end connecting piece.

Background

The in-process of precast pile using, the precast pile of different length is selected according to the user demand of difference, need come the long length's of form pile body through interconnect between precast pile and the precast pile, the swiftness degree of connecting and the fastness of precast pile hookup location are all crucial when the precast pile is connected, all adopt the connecting piece to carry out fixed connection now between the adjacent precast pile basically, the fixed mode that adopts between the coupling nut in connecting piece and the precast pile has the multiple, for example, the joint, grafting or threaded connection.

Chinese patent No. CN 104947658A discloses a snap-type connector, which comprises a large nut sleeve, a small nut sleeve, a snap-type connector and an insertion rod, wherein the large nut sleeve is connected with the connector in a threaded manner, a plurality of bent elastic pieces are annularly arrayed on one side of the connector accommodated in the large nut sleeve, and an included angle greater than 0 ° is formed between the bent elastic pieces and the inner side wall of the large nut sleeve; one side of the inserted rod is in threaded connection with the small nut sleeve, the other side of the inserted rod is provided with a ring groove on the peripheral surface of the inserted rod, and the ring groove is arranged as a blocking surface on one side of the ring groove far away from the small nut sleeve and is used for limiting a bent elastic sheet clamped in the ring groove; correspondingly, the connecting pile comprises an upper pile, a lower pile and a precast pile connecting piece for connecting the upper pile and the lower pile, wherein the precast pile connecting piece is the connecting piece, one side of the large nut sleeve, which is far away from the small nut sleeve, is provided with first thread steel, one end of the first thread steel is embedded in the upper pile to be fixedly connected, and the other end of the first thread steel is limited on the large nut sleeve through a first locking nut; and one side of the small nut sleeve, which is far away from the large nut sleeve, is provided with second thread steel, one end of the second thread steel is embedded in the lower connecting pile to be fixedly connected, and the other end of the second thread steel is limited on the small nut sleeve through a second locking nut.

The fastening nut in this patent connecting piece's one end is passed through bullet card formula structure and a precast pile and is connected, and the other end passes through the fastening nut fixed connection in threaded connection mode and another precast pile, but the drawback that exists among the in-service use lies in, does not have the skew clearance between connecting piece threaded connection's one end and the fastening nut, in case lead to when the stake, the pile body in case takes place the skew, the connecting piece other end will peg graft not in place, the joint effect of bullet card formula structure can not be guaranteed, this patent improves to this defect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defect that prior art exists, provide a self-interacting double end connecting piece.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a self-adjusting double-end connecting piece comprises an inserting rod main body, wherein inserting portions are arranged at two ends of the inserting rod main body, clamping mechanisms are connected with the inserting portions at the two ends of the inserting rod main body, and a joint of the inserting rod main body and the clamping mechanisms is provided with an offset gap suitable for self adjustment of the inserting rod main body.

Further, latch mechanism is for bullet knot latch mechanism, and bullet knot latch mechanism is including setting up the middle retaining member in the inserted bar main part and the inserting part junction joint neck outside, and middle retaining member includes the retaining member main part, and the one end of retaining member main part is equipped with fixed flange, and the other end is equipped with a plurality of locking jack catchs, and the free end of a plurality of locking jack catchs is collected and is formed the locking bayonet socket, and the inside of retaining member main part is equipped with the inserted hole, inserted hole and locking bayonet socket intercommunication, the inserted part of inserted bar main part tip stretches into the inserted hole of retaining member main part and passes the locking bayonet socket.

Further, the latch mechanism is card latched device, card latched device establishes the middle latch segment in the inserted bar main part outside and sets up at middle latch segment tip and concatenation block at the outside lock core of joint neck including the cover, one side port inner wall of middle latch segment is the toper face, the lock core be located in the port of middle latch segment and with the inner wall butt cooperation of port.

Furthermore, the cross-section of the lock core block is polygonal, the lock core block is provided with an upper surface, an outer side surface, an inner side surface and a bottom surface, the upper surface of the lock core block is an arc surface or an inclined surface, the outer side surface and the inner side surface are inclined surfaces, the bottom surface is a plane, the outer side surface of the lock core block is in point contact or surface contact with the inner wall of the port of the middle locking block, the inner side surface of the lock core block is in close contact with the clamping neck of the inserted bar main body, and the upper surface of the lock core block is.

Furthermore, a bracket is arranged in a cavity of the connecting nut in the precast pile, the bracket is positioned on one side of the lock core block and is in contact with the lock core block, and the bottom of the bracket is connected with a supporting spring.

Furthermore, the top of the lock catch type insertion part is provided with a positioning tool hole, and the skirt part of the lock catch type insertion part is provided with a slope tensile surface.

Furthermore, the joint of the insertion part and the clamping neck is provided with a limiting tensile boss which is in contact with the free end of the locking clamping jaw.

Furthermore, the surface of the limiting tensile boss is provided with an annular limiting groove, and the free end of the locking claw is matched with the annular limiting groove; the outer side of the annular limiting groove is provided with an annular limiting bulge, and the annular limiting bulge is positioned on the outer side of the free end of the locking clamping jaw.

Furthermore, a gap is reserved between two adjacent locking clamping claws on the middle locking piece; the outer peripheral surfaces of the locking piece main body and the middle locking block are provided with threads, and the middle locking piece and the middle locking block are in threaded connection with the precast pile or a connecting nut on the precast pile in a threaded connection mode.

Furthermore, the inner side surface of the free end of the locking claw is provided with a tensile supporting point.

The utility model has the advantages that: this double-end connecting piece's both ends are all avoided direct and the coupling nut threaded connection in the precast pile, the both ends insertion portion of inserted bar main part is connected bullet knot latch mechanism and/or card latched device, bullet knot latch mechanism has middle retaining member, card latched device all has middle latch segment, come the insertion portion of block inserted bar main part through middle retaining member or middle latch segment, the fastening back of insertion portion, coupling nut threaded connection in through middle retaining member or middle retaining segment and the precast pile, when to the stake, even there is the deviation to take place the skew in the precast pile butt joint, also can rock the regulation through controlling to the inserted bar main part and realize effectively connecing the stake, make the connecing stake convenient and firm.

Drawings

Fig. 1 is a schematic structural view of the present invention in embodiment 1;

fig. 2 is a schematic structural view of the insertion rod main body of the present invention in embodiment 1;

fig. 3 is a schematic structural view of the main body of the insert rod with the annular limiting protrusion of the present invention in embodiment 1;

FIG. 4 is a schematic view showing the structure of the intermediate locking member of the present invention in example 1;

FIG. 5 is a schematic top view of an intermediate locking member with four locking jaws according to example 1;

FIG. 6 is a schematic top view of an intermediate locking member with six locking jaws according to example 1;

fig. 7 is a schematic view of the installation of the double-headed connecting member at the splicing position of the precast pile in embodiment 1;

FIG. 8 is an enlargement of area A of FIG. 3;

FIG. 9 is an enlarged view of area B of FIG. 7;

fig. 10 is a schematic structural view of the present invention in embodiment 2;

fig. 11 is a schematic view of the installation of the present invention in embodiment 2;

fig. 12 is a schematic view of the insert rod main body of the present invention in embodiment 2;

fig. 13 is a schematic view of a main body of an insert rod with a positioning tool hole according to the present invention in embodiment 2;

FIG. 14 is a schematic view of the main body of the tension-resisting plug rod with inclination of the present invention in embodiment 2;

fig. 15 is a schematic view of a main body of an insert pin with a slanted peripheral surface according to the present invention in embodiment 2;

fig. 16 is a schematic cross-sectional view of the middle locking block of the present invention in embodiment 2;

fig. 17 is a schematic cross-sectional view of the lock core block of the present invention in embodiment 2;

fig. 18 is another schematic cross-sectional view of the lock core block of the present invention in embodiment 2;

FIG. 19 is a schematic view showing the engagement of the lever main body with the inclined pull-resistant surface with the middle locking block and the key cylinder block in embodiment 2;

fig. 20 is a schematic structural view of embodiment 3 of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figure 1, the self-adjusting double-head connecting piece comprises an inserting rod main body 1, wherein the two ends of the inserting rod main body 1 are provided with inserting parts 2, and the inserting parts of the inserting rod main body 1 are connected with an elastic buckle clamping mechanism or a card locking mechanism. The junction of the plunger body 1 with the snap-in and card-lock mechanisms is provided with an offset gap 100 adapted for self-adjustment of the plunger body.

Example 1

As shown in fig. 1, 2 and 4, in the present embodiment, both the two insertion portions 2 of the plunger body 1 are snap-fit insertion portions, and the two snap-fit insertion portions are cooperatively installed with a snap-fit latch mechanism;

the bullet knot clamping mechanism is including setting up middle retaining member 4 in the 3 outsides of joint neck, joint neck 3 is located the junction of inserted bar main part 1 and insertion part 2, middle retaining member 4 includes retaining member main part 5, the one end of retaining member main part 5 is equipped with fixing flange 6, the other end is equipped with a plurality of locking jack catch 7, the free end of a plurality of locking jack catch 7 is collected and is formed locking bayonet 8, the inside of retaining member main part 5 is equipped with inserted hole 9, inserted hole 9 and locking bayonet 8 intercommunication, the insertion part 2 of 1 tip of inserted bar main part stretches into the inserted hole 9 of retaining member main part 5 and passes locking bayonet 8, a plurality of locking jack catch 7 receive and can outwards expand after 2 extrudees of insertion part, after 2 passes of insertion part, 7 automatic re-sets of a plurality of locking jack catch.

It should be noted that, due to the presence of the aforementioned offset gap, the insert shaft body 1 can be axially offset with respect to the intermediate locking member 4 after the insert shaft body 1 is assembled with the intermediate locking member 4.

As shown in fig. 5 and 6, the number of the locking claws 7 on the intermediate locking member 4 can be plural, and a gap is provided between two adjacent locking claws 7 on the locking member main body 5, so that the plural locking claws 7 can be conveniently expanded outwards and automatically restored and collected, and in this embodiment, the specific number of the locking claws 7 is four or six.

Further, a blocking and clamping table 10 which is integrally formed with the inserting rod main body 1 is arranged in the middle of the inserting rod main body 1; a limiting tensile boss 11 which is contacted with the free end of the locking clamping jaw 7 is arranged at the joint of the inserting part 2 and the clamping neck 3, an annular limiting groove 12 is arranged on the surface of the limiting tensile boss 11, and the free end of the locking clamping jaw 7 is matched with the annular limiting groove 12;

as shown in fig. 3 and 8, the outer side of the annular limiting groove 12 is provided with an annular limiting protrusion 13, and when the insertion part 2 is inserted into the intermediate locking member 4, the annular limiting protrusion 13 is located on the outer side of the free end of the locking claw 7.

Further, the insertion portion 2 has an arc-shaped end surface, and the size of the arc-shaped end surface is larger than the original-state caliber of the locking bayonet 8.

Wherein, the inserted bar main body 1, the clamping neck 3, the inserting part 2 and the resisting clamping table 10 are integrally formed. The diameter of joint neck 3 is less than the diameter of inserted bar main part 1, and the medial surface of locking jack catch 7 free end is equipped with tensile strong point 14, and when middle retaining member 4 formed the joint with double-end connecting piece, joint neck 3 and spacing tensile boss 11's transition position and tensile strong point 14 in close contact with.

The utility model discloses in, retaining member main part 5's outer peripheral face has the screw thread, and middle retaining member 4 buries underground in the coupling nut 16 threaded connection of prefabricated component (precast pile or prefabricated wall etc.) through threaded connection mode and precast pile.

In addition, as shown in fig. 7 and 9, the double-head connecting piece can connect the precast pile, the connecting nut 16 is embedded in the end face of the precast pile, the connecting nut 16 is connected with the middle locking piece 4 on the double-head connecting piece in a threaded manner.

When splicing two precast piles, connecting nut 16 is screwed into middle locking piece 4, then the connecting piece is inserted into middle locking piece 4 of the lower end face of upper pile 15 or middle locking piece 4 of the upper end face of lower pile 17, upper pile 15 is hoisted by using a hoisting device, after middle locking piece 4 of upper and lower piles are axially aligned, upper pile 15 is pressed downwards, inserting part 2 of the other end of the inserting rod main body is inserted into corresponding middle locking piece 4, and pile splicing is completed. In practice, to seal the connector, the connector is usually inserted before filling the intermediate locking member 4 with epoxy resin or dipping the end of the connector with epoxy resin, and then inserted.

When the upper pile 15 and the lower pile 17 generate tension relatively, the relative tension is generated between the locking claw 7 at the end part of the fixed middle locking part 4 and the limiting tensile boss 11 on the inserted bar main body 1, and the limiting tensile boss 11 abuts against the locking claw 7 to limit the locking claw 7, so that the connection firmness of the two precast piles is ensured;

in addition, when the splicing part of two precast piles suddenly receives a large tensile force, the locking claw 7 inevitably receives a strong impact force, the annular limiting groove 12 and the annular limiting bulge 13 on the limiting tensile boss 11 play a role in radially limiting the locking claw 7, when the locking claw 7 elastically deforms and slides outwards, the annular limiting bulge 13 applies a reverse force to the locking claw 7, so that the locking claw 7 is prevented from slipping from the limiting tensile boss 11, and the stability of clamping the inserted bar main body 1 and the middle locking part 4 is ensured;

moreover, the blocking table 10 at the middle part of the inserted link main body 1 can prevent the problem that the upper pile 15 cannot be effectively blocked because the inserted link main body 1 is inserted into the lower pile 17 too much when the upper pile and the lower pile are spliced;

the medial surface of 7 free ends of locking jack catch is equipped with tensile strong point 14, after the joint is accomplished, 14 butt of tensile strong point are in joint neck 3 and spacing tensile boss 11's transition position department, at this moment, 7 free ends of locking jack catch and spacing tensile boss 11's area of contact have been increased, 7 free ends of locking jack catch and spacing tensile boss 11's support stability has effectively been guaranteed, when the effect of strong pulling force is received to inserted bar main part 1, the tensile strong point 14 of locking jack catch 7 free ends and the transition position department of spacing tensile boss 11 form stable bearing diagonal, guaranteed tensile strong point 14 and spacing tensile boss 11 effective contact all the time, locking jack catch 7's tensile strength has further been improved.

In conclusion, this double-end connector adopts both ends all to set up grafting portion 2, and the mode that is connected through middle retaining member 4 and coupling nut is connected and is gone up stake 15 and lower stake 17, it is spacing relatively through locking claw 7 and spacing tensile boss 11 between middle retaining member 4 and the inserted bar main part 1, tensile strength is high and stable, the required accessory of installation is few, coupling nut threaded connection in through middle retaining member 4 and the precast pile, when to the stake, even there is the deviation to take place to squint in the precast pile butt joint, also can rock the regulation (because inserted bar main part 1 and middle retaining member 4 assembly back, inserted bar main part 1 can the axial skew for middle retaining member 4) about to the inserted bar main part, realize effectively connecing the stake, make the grafting convenient and firm, prevent that inserted bar main part 1 from appearing the problem of pegging graft not in place.

Example 2

As shown in fig. 10 to 18, in the present embodiment, both the insertion portions 2 of the plunger body 1 are latch-type insertion portions, and the latch-type insertion portions are cooperatively mounted with a card latch mechanism; the card lock catch mechanism comprises a middle locking block 20 and a lock core block 21, wherein the middle locking block 20 is sleeved on the outer side of the inserted link main body 1, the lock core block 21 is arranged at the end part of the middle locking block 20 and is spliced and clamped outside the clamping neck 3, the inner wall of a port 22 at one end of the middle locking block 20 is a conical surface, and the lock core block 21 is located in the port 22 of the middle locking block and is occluded with the inner wall of the port 22.

The section of the lock core block 21 is polygonal, the lock core block is provided with an upper surface 211, an outer side surface 213, an inner side surface 212 and a bottom surface 214, the upper surface 211 of the lock core block is an arc surface or an inclined surface, the outer side surface 213 and the inner side surface 212 are inclined surfaces, the bottom surface 214 is a plane, the outer side surface 213 of the lock core block 21 is in point contact or surface contact with the inner wall point of the middle locking block port 22, the inner side surface 212 of the lock core block is in tight contact with the clamping neck 3 of the plunger body 1, and the upper surface 211 of the lock core block is in contact with the; in addition, the inner side surface 212 of the locking core block can be provided with saw teeth 215, and the friction force between the locking core block 21 and the inner wall of the middle locking block port 22 can be improved through the saw teeth 215, so that the tensile strength is improved;

further, in order to ensure the installation stability of the lock core block 21 in the middle lock block port 22, a bracket 23 is arranged in the cavity of the connecting nut 16, the bracket 23 is positioned on one side of the bottom surface 214 of the lock core block 21 and is in contact with the bottom surface 214, and the bottom of the bracket 23 is connected with a support spring 24;

moreover, the middle part of the inserted link main body 1 is provided with a resisting clamping table 10 which is integrally formed with the inserted link main body 1, or the peripheral surface of the inserted link main body 1 is an inclined peripheral surface which is formed by two conical surfaces and has a large middle part and two small ends, and the resisting clamping table 10 and the inclined peripheral surface can prevent the problem that the inserted link main body 1 is inserted into the lower pile 17 too much to effectively clamp the upper pile 15 when the upper pile and the lower pile are spliced; in addition, as shown in fig. 13, the top of the latch-type insertion portion of the plunger body 1 is provided with a positioning tool hole 25, and the positioning tool hole 25 is mainly convenient for positioning; as shown in fig. 14, 15 and 19, the skirt of the lock catch type insertion part is provided with an inclined tensile surface 26, a plurality of stages of tensile steps 26a are arranged on the inclined tensile surface 26, and a plurality of stages of saw teeth 215 are arranged on the contact surface of the lock core block 21 and the corresponding contact surface, so that when the lock core block 21 is in friction displacement along the inclined tensile surface 26, the position of the uppermost stage of tensile steps 26a is arranged to enable the lock core block 21 to be clamped on the blocking surface, and the gap between the upper pile and the lower pile is 0; the position of the tensile step 26a of the opposite lowest layer is set so that when the lock core block 21 is clamped on the blocking surface, the gap between the upper pile and the lower pile is smaller than or equal to the maximum allowable error range; the number of the tensile steps 26a may be plural, and is preferably 3.

It should be understood by those skilled in the art that the tensile step 26a is disposed on the slope tensile surface 26 to further increase the pulling resistance effect, and neither of the tensile steps 26a nor the tensile steps 26a is disposed on the slope tensile surfaces 26 at both ends, or the tensile step 26a is disposed on one end of the slope tensile surface 26 and the tensile step 26a is not disposed on the other end of the slope tensile surface 26, which are all within the protection scope of the present disclosure.

When the connecting piece corresponding to the embodiment is used for splicing two precast piles, the supporting spring 24, the bracket 23 and the lock core block 21 are sequentially placed into the inner cavity of the connecting nut 16, then the middle locking block 20 is screwed to be in threaded connection with the connecting nut 16, at the moment, the lock core block 21 abuts against the inner surface of the port 22 of the middle locking block under the action of the elastic force of the supporting spring 24, then the connecting piece is inserted into the middle locking block 20 on the lower end surface of the upper pile 15 or the middle locking block 20 on the upper end surface of the lower pile 17, along with the insertion of the connecting piece, the lock core block 21 moves downwards under the extrusion of the connecting piece, after moving downwards to a certain position, the lock core block 21 slides into the clamping neck 3 under the action of the elastic force of the supporting spring 24 to form effective clamping, then the upper pile 15 is lifted by using a lifting device, after the middle locking blocks 20 of the upper and lower piles are axially aligned, the upper pile 15 is pressed downwards, the insertion part 2, and (5) completing pile splicing.

Example 3

As shown in fig. 20, the insertion portion at one end of the inserted link body is a snap-fit insertion portion, the snap-fit insertion portion is a snap-fit insertion portion for installing the snap-fit latch mechanism, the insertion portion at the other end of the inserted link body is a snap-fit insertion portion for installing the card latch mechanism, and the snap-fit insertion portion are the same as those in embodiments 1 and 2, respectively, and are not repeated here.

The both ends of this double-end connecting piece all avoid direct and precast pile in the coupling nut threaded connection, the portion of inserting of inserted bar main part is connected and is expected to detain latch mechanism or card latched device, it has middle retaining member to expect to detain latch mechanism, card latched device all has middle latch segment, come the portion of inserting of block inserted bar main part through middle retaining member or middle latch segment, the portion of inserting fastens the back, coupling nut threaded connection in through middle retaining member or middle latch segment and the precast pile, when to the stake, the portion of inserting at inserted bar main part both ends all has the skew clearance, it is convenient and firm to the stake.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A self-adjusting double-end connecting piece comprises an inserting rod main body, wherein inserting portions are arranged at two ends of the inserting rod main body, the inserting portions at the two ends of the inserting rod main body are connected with a clamping mechanism, and an offset gap suitable for self adjustment of the inserting rod main body is arranged at the joint of the inserting rod main body and the clamping mechanism.

2. The self-adjusting double-end connector as claimed in claim 1, wherein the locking mechanism is a snap locking mechanism, the snap locking mechanism comprises an intermediate locking member arranged at the joint of the inserting rod main body and the inserting part and used for clamping the outside of the neck, the intermediate locking member comprises a locking member main body, one end of the locking member main body is provided with a fixing flange, the other end of the locking member main body is provided with a plurality of locking claws, free ends of the locking claws are folded to form a locking bayonet, the inside of the locking member main body is provided with an inserting hole, the inserting hole is communicated with the locking bayonet, and the inserting part at the end part of the inserting rod main body extends into the inserting hole of the locking member main body.

3. The self-adjusting double-end connecting piece according to claim 1, wherein the clamping mechanism is a card locking mechanism, the card locking mechanism comprises a middle locking block which is sleeved outside the inserted link main body and a lock cylinder which is arranged at the end part of the middle locking block and is spliced and clamped outside the clamping neck, the inner wall of a port on one side of the middle locking block is a conical surface, and the lock cylinder is located in the port of the middle locking block and is in butt fit with the inner wall of the port.

4. The self-adjusting double-end connector according to claim 3, wherein the cross section of the lock core block is polygonal, the lock core block has an upper surface, an outer side surface, an inner side surface and a bottom surface, the upper surface of the lock core block is an arc surface or an inclined surface, the outer side surface and the inner side surface are inclined surfaces, the bottom surface is a plane, the outer side surface of the lock core block is in point contact or surface contact with the inner wall point of the middle locking block port, the inner side surface of the lock core block is in close contact with the clamping neck of the plunger body, and the upper surface of the lock core block is in contact with the end of the plunger.

5. The self-adjusting double-ended connector according to claim 3, wherein a bracket is provided in the cavity of the connecting nut in the tubular pile, the bracket is located on one side of the lock cylinder block and contacts the lock cylinder block, and a support spring is connected to the bottom of the bracket.

6. The self-adjusting double end connection according to claim 3, wherein the top of the insert is provided with a locating tool hole and the skirt of the insert is provided with a tapered tension face.

7. The self-adjusting double-ended connector according to claim 2, wherein a limiting tensile boss is provided at the joint of the insertion portion and the clamping neck portion, and the limiting tensile boss is in contact with the free end of the locking claw.

8. The self-adjusting double-ended connecting piece according to claim 7, wherein the surface of the limiting tensile boss is provided with an annular limiting groove, and the free end of the locking claw is matched with the annular limiting groove; the outer side of the annular limiting groove is provided with an annular limiting bulge, and the annular limiting bulge is positioned on the outer side of the free end of the locking clamping jaw.

9. The self-adjusting double end connector as claimed in claim 2, wherein the intermediate locking member has a gap between two adjacent locking jaws; the outer peripheral face of retaining member main part and middle latch segment has the screw thread, and middle retaining member and middle latch segment pass through threaded connection mode and lock nut threaded connection on precast pile or the tubular pile.

10. Self-adjusting double-ended connecting element according to claim 2, characterized in that the inner side of the free ends of the locking jaws is provided with a tensile support point.

Images