Square pile connecting assembly
By combining a plug, spring clip, and spring, the problem of loosening and instability in the connection of prefabricated components is solved, achieving a stable and convenient connection method that can adapt to manufacturing errors and ensure the stable fixation of the plug.
Patent Information
- Application Number
- CN202511134349.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-14
- Publication Date
- 2025-11-07
AI Technical Summary
There are problems with loose and unstable connections in existing precast component connections, especially due to sleeve spacing deviations and rod movement caused by manufacturing errors, which are difficult to solve effectively using traditional connection methods.
The device employs a combination structure of insert rod, spring clip, and spring. The deformation and engagement of the spring clip achieve a stable connection between the insert rod and the intermediate sleeve. The spring and the intermediate sleeve work together to maintain the position and provide one-way limiting, ensuring the stable fixation of the insert rod.
It achieves stable and convenient connection, can adapt to sleeve gaps caused by manufacturing errors, avoids loosening, facilitates adjustment of the insertion rod length, and ensures a firm connection.
Smart Images
Figure CN120906128A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a connecting device, in particular to a square pile connecting assembly for connecting two prefabricated components. BACKGROUND
[0002] With the development of prefabricated component connecting technology, a prefabricated component quick connecting technology appears, which generally provides a pre-buried sleeve at the connecting position of two prefabricated components, and locks two pre-buried sleeves by a plug rod and an elastic member to realize the connection of two prefabricated components. In the traditional technology, the elastic member is generally fixedly connected with the plug rod, and the elastic member includes a plurality of elastic pieces which can abut against the inner wall of the pre-buried sleeve and prevent the plug rod from being pulled out of the pre-buried sleeve.
[0003] For example, a connecting assembly and a prefabricated component are provided in patent CN220620726U, the connecting assembly includes a first sleeve, a second sleeve, an intermediate sleeve, a connecting sleeve and a plug rod, the intermediate sleeve is provided with a stepped portion at one end away from the first sleeve, the stepped portion includes a position reaching abutting surface and a safety abutting surface with a height difference; the connecting sleeve includes a connecting portion and an elastic portion connected with each other; the elastic portion includes a plurality of elastic pieces, the plurality of elastic pieces can be elastically contracted into the intermediate sleeve and can be elastically expanded to abut against the position reaching abutting surface or the safety abutting surface; a first force releasing groove is formed in the outer peripheral wall of the elastic portion, the elastic portion can be broken along the first force releasing groove under stress, and after being broken, the groove wall of the first force releasing groove forms a guide inclined surface, and the broken part of the elastic portion forms a clamping piece, and the guide inclined surface is used to guide the clamping piece to slide in the axial direction of the connecting sleeve away from one end of the intermediate sleeve.
[0004] The connecting assembly in the above patent, the connecting sleeve needs to be fixed with the end of the plug rod first, and then the connecting sleeve passes through the intermediate sleeve along with the plug rod, and after passing through the intermediate sleeve, the elastic portion at the end of the connecting sleeve is expanded and abuts against the stepped portion of the intermediate sleeve to realize the relative fixation of the plug rod and the intermediate sleeve. However, there is a certain defect: the position of the elastic portion of the connecting sleeve in the long axis direction of the plug rod changes between the contracted state and the expanded state. Taking the side end of the plug rod extending into the second sleeve as the starting point, the vertical distance from the end position of the elastic portion in the contracted state to the starting point is longer than the vertical distance from the end position of the elastic portion in the expanded state to the starting point. This may cause a certain gap between the connecting sleeve and the intermediate sleeve in the long axis direction of the plug rod when the connecting sleeve in the contracted state is expanded after passing through the intermediate sleeve, that is, a certain gap between the relative plug rod and the intermediate sleeve, and further cause the connecting assembly to loosen, which ultimately affects the stability of the connection between the prefabricated components.
[0005] In addition, in actual production application, there is a certain deviation between the first sleeve and the second sleeve due to manufacturing errors, working condition requirements and other factors, that is, the length of the inserted rod extending into the second sleeve changes, but in the above structure, the length of the inserted rod extending into the second sleeve is determined by the cooperation of the middle sleeve and the connecting sleeve, and the inserted rod and the middle sleeve are connected in a movable plug-in manner, and there is no fixing member between them, and the distance change is realized only by the thread adjustment between the connecting sleeve and the inserted rod, but this way is limited by the elastic part of the connecting sleeve, that is, if the connecting sleeve is too far away from the middle sleeve, the elastic part cannot be abutted against the end face of the middle sleeve, which will cause the position of the inserted rod and the middle sleeve to be lost, and the inserted rod will move in the middle sleeve, which will also cause unstable connection and inconvenient adjustment. SUMMARY
[0006] The technical problem to be solved by the present application is to provide a square pile connecting assembly which is convenient, stable and easy to adjust.
[0007] To solve the above technical problems, the technical scheme of the present application is as follows: a square pile connecting assembly, which is characterized by comprising a first sleeve, a second sleeve and a connecting piece for connecting the first sleeve and the second sleeve, the connecting piece comprising an inserted rod, a middle sleeve, a spring and a deformable elastic clamping piece. The first sleeve and the second sleeve have first and second ends arranged opposite to each other; The middle sleeve, the elastic clamping piece and the spring are coaxially arranged in the first sleeve; The middle sleeve is located at the first end of the first sleeve, and the middle sleeve has a through cavity in the center, and the through cavity is an inner taper sleeve section away from the first end; The elastic clamping piece has a deformable engagement cavity in the center, and the inner wall of the engagement cavity is provided with a first engagement structure in the form of a ring or an internal thread, and the outer surface of the elastic clamping piece has an outer taper sleeve section for cooperating with the inner taper sleeve section of the middle sleeve to control the contraction or reset of the engagement cavity; The elastic clamping piece is abutted against the middle sleeve by the spring, so that the outer taper sleeve section of the elastic clamping piece is embedded in the inner taper sleeve section of the middle sleeve; The inserted rod is arranged in the second sleeve and extends out of the second end of the second sleeve, and the outer surface of the inserted rod is provided with a second engagement structure which can engage with the first engagement structure; The inserted rod can pass through the through cavity of the middle sleeve and be inserted into the engagement cavity of the elastic clamping piece to realize the connection of the inserted rod and the elastic clamping piece.
[0008] Further, the front end of the inserted rod has an expansion guide head, and the size of the expansion guide head is not less than the size of the first engagement structure of the inserted rod; The elastic card can move away from or close to the intermediate sleeve in the first sleeve under the action of the insertion rod and the spring, thereby switching the elastic card between the first, second and third states; The first state, the insertion rod is not in contact with the elastic card, under the action of the spring, the outer tapered sleeve section of the elastic card is embedded in the inner tapered sleeve section of the intermediate sleeve, and is pressed against the inner wall of the inner tapered sleeve section, the inner diameter of the first engagement structure of the engagement cavity is not greater than the size of the second engagement structure of the insertion rod, at this time, the engagement cavity of the elastic card is in a contracted state; The second state, under the push of the insertion rod, the elastic card overcomes the deformation force of the spring, the outer tapered sleeve section of the elastic card is away from the inner tapered sleeve section of the intermediate sleeve, the inner diameter of the first engagement structure of the engagement cavity is not greater than the size of the second engagement structure of the insertion rod, the engagement cavity of the elastic card is in a natural state; The third state, under the push of the insertion rod, the elastic card overcomes the deformation force of the spring, the outer tapered sleeve section of the elastic card is away from the inner tapered sleeve section of the intermediate sleeve, the inner diameter of the first engagement structure of the engagement cavity is greater than the size of the second engagement structure of the insertion rod, and is not less than the size of the expansion guide head, the engagement cavity of the elastic card is in an expanded state.
[0009] Further, the insertion rod has an expansion guide head, a retaining section, a transition section, a second engagement structure, a stage section and a third engagement structure distributed in sequence, the third engagement structure is engaged with and fixed to the second sleeve, the size of the transition section is smaller than the size of the second engagement structure, the size of the retaining section is not less than the size of the second engagement structure, and the size of the stage section is greater than the size of the second engagement structure; The intermediate sleeve has a through cavity for the insertion rod to pass through, the through cavity is in a stepped shape and has an inner tapered sleeve section, a limiting section and an insertion section in sequence, the sizes of the inner tapered sleeve section, the limiting section and the insertion section are all greater than the sizes of the expansion guide head, the retaining section, the transition section and the second engagement structure of the insertion rod, the size of the limiting section is smaller than the size of the stage section, the size of the insertion section is not less than the size of the stage section and is smaller than the size of the third engagement structure; The outer wall of the elastic card is also in a stepped shape and has an outer cylindrical section and an outer tapered sleeve section in sequence, and the size of the outer cylindrical section is greater than the size of the inner tapered sleeve section, the elastic card also has a deformation groove for switching the elastic card between the first, second and third states; The spring is a conical spring, and one side of the spring with a small size is against the end of the elastic card, and the other side of the spring with a large size is against the inner wall of the first sleeve.
[0010] Further, the deformation groove has four, and is in a ring shape distributed on the elastic card, and one of the deformation grooves is a through groove extending out of the outer tapered sleeve section on one side and extending out of the outer cylindrical section on the other side, and the remaining three deformation grooves are blind grooves extending out of the outer tapered sleeve section on one side and extending to the outer cylindrical section on the other side.
[0011] Further, the stage section is an outer hexagonal stage, and the insertion section is an inner hexagonal hole.
[0012] Further, the elastic card is away from one side of the intermediate sleeve and is provided with a card slot which can accommodate the spring and the size of the spring is small, and the card slot is communicated with the engaging cavity.
[0013] The connecting assembly in the application adopts the cooperation of the inserting rod, the elastic card, the intermediate sleeve and the spring to realize the connection of the first sleeve and the second sleeve, and the elastic card, the intermediate sleeve and the spring are arranged in the first sleeve, one side of the inserting rod is fixed with the second sleeve by screwing, and the other side is directly inserted into the elastic card in the first sleeve and fixed, which is very convenient.
[0014] Moreover, even if a gap exists between the two sleeves due to manufacturing errors or other reasons, the connecting mode can still realize the compensation of the gap and the loosening phenomenon will not occur due to the gap.
[0015] For the fixation between the inserting rod and the elastic card, the elastic card is deformed to cooperate with the inserting rod, the relative fixation between the elastic card and the inserting rod is realized, one side of the elastic card is fixed by the intermediate sleeve, and the other side is resisted by the spring, the spring is used to maintain the position of the elastic card, so that the inserting rod can be inserted into the elastic card to be clamped and cooperated with the elastic card, the adjustment is facilitated, and the elastic card can be one-way limited by controlling the size of the maintaining section of the inserting rod, so that the elastic card cannot be withdrawn from the inserting rod.
[0016] In addition, the inner tapered sleeve section of the intermediate sleeve cooperates with the outer tapered sleeve section of the elastic card, after the second engaging structure of the inserting rod is engaged with the first engaging structure of the elastic card, the size of the inner tapered sleeve section and the outer tapered sleeve section is controlled, and the tapered surfaces of the two are cooperated, so that the inserting rod is one-way limited, the inserting rod can only be inserted in one direction and cannot be withdrawn in the opposite direction, thereby ensuring the stable connection of the inserting rod and the elastic card.
[0017] For the card slot provided on the side of the elastic card and accommodating the spring, the spring is inserted into the elastic card to limit the relative position of the spring and the elastic card, so that the spring can stably resist the elastic card on one side of the intermediate sleeve. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a schematic view of the square pile connecting assembly.
[0019] Figure 2 It is a sectional view of the inserting rod.
[0020] Figure 3 It is a sectional view of the elastic card.
[0021] Figure 4This is a cross-sectional view of another side of the spring clip in this invention.
[0022] Figure 5 This is a cross-sectional view of the intermediate sleeve in this invention. Detailed Implementation
[0023] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0024] like Figures 1-5 The square pile connection assembly shown includes a first sleeve 1, a second sleeve 2, and a connector for connecting the first sleeve 1 and the second sleeve 2. The connector includes a rod 3, an intermediate sleeve 4, a spring 6, and a deformable spring clip 5.
[0025] The first sleeve 1 and the second sleeve 2 have first and second ends that are arranged opposite to each other.
[0026] The intermediate sleeve 4, spring clip 5, and spring 6 are coaxially housed within the first sleeve 1.
[0027] The intermediate sleeve 4 is located at the first end of the first sleeve 1. The intermediate sleeve 4 has a through cavity at its center, and the section of the through cavity away from the first end is an inner conical sleeve section 41.
[0028] The spring clip 5 has a deformable engagement cavity at its center. The inner wall of the engagement cavity is provided with a first engagement structure 53 in the shape of an annular or internal thread. The outer surface of the spring clip 5 has an outer conical sleeve section 52 for cooperating with the inner conical sleeve section 41 of the intermediate sleeve 4 to control the contraction or reset of the engagement cavity.
[0029] The spring clip 5 is pressed against the intermediate sleeve 4 by the spring 6, so that the outer conical sleeve section 52 of the spring clip 5 is embedded in the inner conical sleeve section 41 of the intermediate sleeve 4.
[0030] The insertion rod 3 is disposed inside the second sleeve 2 and extends out of the second end of the second sleeve 2. A second engagement structure 33 is provided on the outer surface of the insertion rod 3, which can engage with the first engagement structure 53.
[0031] The insertion rod 3 can pass through the through cavity of the intermediate sleeve 4 and then be inserted into the engagement cavity of the spring clip 5 to achieve the connection between the insertion rod 3 and the spring clip 5.
[0032] The front end of the insertion rod 3 has an expansion guide head 31, the size of which is not smaller than the size of the first engagement structure 33 of the insertion rod 3.
[0033] The spring clip 5 can move away from or close to the middle sleeve within the first sleeve under the action of the insertion rod and the spring, thereby allowing the spring clip to switch between the first, second and third states.
[0034] In the first state, the insert rod 3 and the spring clip 5 are not in contact. Under the action of the spring 6, the outer conical sleeve 52 of the spring clip 5 is embedded in the inner conical sleeve 41 of the intermediate sleeve 4 and pressed against the inner wall of the inner conical sleeve 41. The inner diameter of the first engagement structure 53 of the engagement cavity is not greater than the size of the second engagement structure 33 of the insert rod 4. At this time, the engagement cavity of the spring clip 4 is in a contracted state.
[0035] In the second state, under the push of the insert rod 3, the spring clip 5 overcomes the deformation force of the spring 6, and the outer conical sleeve section 52 of the spring clip 5 is far away from the inner conical sleeve section 41 of the intermediate sleeve 4. The inner diameter of the first engagement structure 53 of the engagement cavity is not greater than the size of the second engagement structure 33 of the insert rod 3, and the engagement cavity of the spring clip 5 is in a natural state.
[0036] In the third state, under the push of the insert rod 3, the spring clip 5 overcomes the deformation force of the spring 6. The outer conical sleeve section 52 of the spring clip 5 is far away from the inner conical sleeve section of the intermediate sleeve 4. The inner diameter of the first engagement structure of the engagement cavity is larger than the size of the second engagement structure 33 of the insert rod 3, and not smaller than the size of the expansion guide head 31. The engagement cavity of the spring clip 5 is in an open state.
[0037] Specifically, such as Figure 2 As shown in the schematic diagram, the insert 3 has an expansion guide head 31, a retaining section 36, a transition section 32, a second engagement structure 33, a platform stage 34, and a third engagement structure 35 arranged sequentially. The expansion guide head 31 is frustum-shaped, and the bottom edge of the larger side of the expansion guide head 31 is adjacent to the retaining section 36. The transition section 32 is a smooth rod section. The outer surface of the second engagement structure 33 has a ring-shaped or internally threaded tooth structure. The third engagement structure 35 has externally threaded teeth and is threadedly fixed to the second sleeve 2. The inner wall of the second sleeve 2 has an internally threaded structure that is threadedly engaged with the third engagement structure 35. The size of the transition section 32 is smaller than the size of the second engagement structure 33. The size of the retaining section 36 is not smaller than the size of the second engagement structure 33. The size of the platform stage 34 is larger than the size of the second engagement structure 33 and smaller than the size of the third engagement structure 35.
[0038] like Figure 5 As shown in the schematic diagram, the outer wall of the intermediate sleeve 4 has external thread teeth, and the inner wall of the first sleeve 1 also has an internal thread structure that is threaded to the intermediate sleeve 4. A through cavity is opened on the intermediate sleeve 4 to allow the insertion rod 3 to pass through. The through cavity is stepped and consists of an inner conical sleeve section 41, a limiting section 42, and an insertion section 43 in sequence. The dimensions of the inner conical sleeve section 41, the limiting section 42, and the insertion section 43 are all larger than the dimensions of the expansion guide head 31, the holding section 36, the transition section 32, and the second engagement structure 33 of the insertion rod 3. The dimension of the limiting section 42 is smaller than the dimension of the platform stage 34. The dimension of the insertion section 43 is not smaller than the dimension of the platform stage 34 and is smaller than the dimension of the third engagement structure 35.
[0039] The platform section 34 is an external hexagonal step, and the insertion section 43 is an internal hexagonal hole. The design of the external hexagonal step and the internal hexagonal hole is to facilitate the threaded fixing between the insertion rod 3 and the second sleeve 2, as well as the threaded fixing between the intermediate sleeve 4 and the first sleeve 1.
[0040] like Figure 3 As shown in the schematic diagram, the outer wall of the spring clip 5 is also stepped, consisting of an outer cylindrical section 51 and an outer conical sleeve section 52. The size of the outer cylindrical section 51 is larger than that of the inner conical sleeve section 41. The spring clip 5 also has a deformation groove 55 that allows the spring clip 5 to switch between the first, second, and third states.
[0041] There are four deformation grooves 55, arranged in a ring on the spring clip 5, and one of the deformation grooves 55 is a through groove extending from one side out of the outer conical sleeve section 52 and from the other side out of the outer cylindrical section 51, such as... Figure 3 As shown, the remaining three deformation grooves 55 are blind grooves extending from one side of the outer conical sleeve section 52 and from the other side to the outer cylindrical section 51, as... Figure 4 As shown.
[0042] Spring 6 is a conical spring, with the smaller side of spring 6 abutting against the end of spring clip 5, and the larger side of spring 6 abutting against the inner wall of the first sleeve 1.
[0043] On the side of the spring clip 5 away from the intermediate sleeve 4, there is a slot 54 for the smaller side of the spring 6 to extend into, and this slot 54 is connected to the engagement cavity. The slot 54 on the side of the spring clip 5 for the spring 6 to extend into the spring clip 5 serves to limit the relative position of the spring 6 and the spring clip 5, so as to ensure that the spring 6 can stably press the spring clip 5 against one side of the intermediate sleeve 4.
[0044] Working principle: When using the connecting component of this invention to cooperate with two prefabricated components to achieve the connection between the two prefabricated components, firstly, the first sleeve 1 and the second sleeve 2 are respectively connected to the side of the two prefabricated components that need to be connected. The insert rod 3 is threadedly connected inside the second sleeve 2. The spring 6, the spring clip 5 and the intermediate sleeve 4 are placed in sequence inside the first sleeve 1 and fixed by the thread between the intermediate sleeve 4 and the second sleeve 2.
[0045] The spring 6 and the spring clip 5 are fixed inside the first sleeve 1. At this time, the spring clip 5 is in the first state. Then, the insert rod 3 passes through the middle sleeve 4 and extends into the spring clip 5. As the insert rod 3 extends, when the side of the expansion guide head 31 adjacent to the holding section 36 is about to move to the spring clip 5, since the size of the expansion guide head 31 on this side is larger than the size of the first engagement structure 53, it will push the spring clip 5 towards the spring 6, so that the spring 6 is squeezed and compressed. At this time, the spring clip 5 moves from the first state to the second state.
[0046] With the continuous extension of the insertion rod 3, the elastic buckle 5 will change from the first state to the third state, and the expansion guide head 31 will be used to expand the engagement cavity of the elastic buckle 5 outward, and enter the engagement cavity of the elastic buckle 5, and with the continuous extension of the insertion rod 3, the expansion guide head 31 will pass through the first engagement structure 53, until the second engagement structure 33 of the insertion rod 3 is engaged with the first engagement structure 53, at this time, the elastic buckle 5 is in the second state, realizing the relative fixation between the insertion rod 3 and the elastic buckle 5, and according to the need, the insertion rod 3 is pushed into the second sleeve 2 to the required length, realizing the connection between the first sleeve 1 and the second sleeve 2, and the connection between the two prefabricated components is completed, the whole connection process is very convenient, and the length of the insertion rod 3 pushed into the first sleeve 1 can be selected according to the need, which is also convenient for adjustment.
[0047] In the above cooperation, after the second engagement structure 33 of the insertion rod 3 and the first engagement structure 53 have been engaged, when the insertion rod 3 is pulled in the opposite direction to move towards the second sleeve 2, the insertion rod 3 will pull the elastic buckle 5 from the second state to the first state, that is, the engagement cavity of the elastic buckle 5 will gradually shrink, which will cause the first engagement structure 53 to be more tightly engaged with the second engagement structure 33, and the connection will be more tightly connected, so as to ensure that the insertion rod 3 will not be easily pulled out of the elastic buckle 5, and the stability of the connection is ensured.
[0048] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to make equivalent embodiments with equivalent changes, but as long as it does not deviate from the technical solution of the present application, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.
Claims
1. A pile connector assembly, characterized by: The connecting piece comprises a plug, an intermediate sleeve, a spring and a deformable elastic catch; The first and second sleeves have first and second ends arranged oppositely; The intermediate sleeve, the elastic catch and the spring are coaxially arranged in the first sleeve; The intermediate sleeve is located at the first end of the first sleeve, and the intermediate sleeve has a through cavity in the center, wherein a section of the through cavity away from the first end is an inner taper sleeve section; The elastic catch has a deformable engagement cavity in the center, and the inner wall of the engagement cavity is provided with a first engagement structure in the form of a ring or internal thread, and the outer surface of the elastic catch has an outer taper sleeve section for cooperating with the inner taper sleeve section of the intermediate sleeve to control the contraction or reset of the engagement cavity; The elastic catch is pressed against the intermediate sleeve by the spring, so that the outer taper sleeve section of the elastic catch is embedded in the inner taper sleeve section of the intermediate sleeve; The plug is arranged in the second sleeve and extends out of the second end of the second sleeve, and the outer surface of the plug is provided with a second engagement structure which can engage with the first engagement structure; The plug can pass through the through cavity of the intermediate sleeve and be inserted into the engagement cavity of the elastic catch, thereby realizing the connection between the plug and the elastic catch.
2. A pile connector assembly according to claim 1, wherein: The front end of the plug has an expansion guide head, and the size of the expansion guide head is not less than the size of the first engagement structure of the plug; The elastic catch can move away from or close to the intermediate sleeve in the first sleeve under the action of the plug and the spring, thereby switching the elastic catch between the first, second and third states; In the first state, the plug is not in contact with the elastic catch, and under the action of the spring, the outer taper sleeve section of the elastic catch is embedded in the inner taper sleeve section of the intermediate sleeve and is pressed against the inner wall of the inner taper sleeve section, the inner diameter of the first engagement structure of the engagement cavity is not greater than the size of the second engagement structure of the plug, and at this time, the engagement cavity of the elastic catch is in a contracted state; In the second state, under the pushing of the plug, the elastic catch overcomes the deformation force of the spring, the outer taper sleeve section of the elastic catch is away from the inner taper sleeve section of the intermediate sleeve, the inner diameter of the first engagement structure of the engagement cavity is not greater than the size of the second engagement structure of the plug, and the engagement cavity of the elastic catch is in a natural state; In the third state, under the pushing of the plug, the elastic catch overcomes the deformation force of the spring, the outer taper sleeve section of the elastic catch is away from the inner taper sleeve section of the intermediate sleeve, the inner diameter of the first engagement structure of the engagement cavity is greater than the size of the second engagement structure of the plug and not less than the size of the expansion guide head, and the engagement cavity of the elastic catch is in an expanded state.
3. A pile connector assembly according to claim 2, wherein: The plug has an expansion guide head, a holding section, a transition section, a second engagement structure, a platform section and a third engagement structure arranged in sequence, the third engagement structure is engaged with and fixed to the second sleeve, the size of the transition section is less than the size of the second engagement structure, the size of the holding section is not less than the size of the second engagement structure, and the size of the platform section is greater than the size of the second engagement structure. The intermediate sleeve is provided with a through cavity for inserting the rod, the through cavity is stepped and sequentially comprises an inner tapered sleeve section, a limiting section and an inserting section, the sizes of the inner tapered sleeve section, the limiting section and the inserting section are all greater than the sizes of the expanded guide head, the retaining section, the transition section and the second engaging structure of the rod, the size of the limiting section is smaller than the size of the stage section, the size of the inserting section is not smaller than the size of the stage section and is smaller than the size of the third engaging structure; The outer wall of the elastic card is also stepped and sequentially comprises an outer cylindrical section and an outer tapered sleeve section, the size of the outer cylindrical section is greater than the size of the inner tapered sleeve section, the elastic card is further provided with deformation grooves for switching the elastic card between the first, second and third states; The spring is a tapered spring, one side of the spring with a small size abuts against the end of the elastic card, and the other side of the spring with a large size abuts against the inner wall of the first sleeve.
4. A pile connector assembly according to claim 3, wherein: The deformation grooves are four and annularly distributed on the elastic card, one of the deformation grooves is a through groove extending out of the outer tapered sleeve section on one side and out of the outer cylindrical section on the other side, and the remaining three deformation grooves are blind grooves extending out of the outer tapered sleeve section on one side and extending to the outer cylindrical section on the other side.
5. The pile connector assembly of claim 3, wherein: The stage section is an outer hexagonal stage, and the inserting section is an inner hexagonal hole.
6. A pile connector assembly according to claim 1 or 3, wherein: The side of the elastic card away from the intermediate sleeve is further provided with a clamping groove for the side of the spring with a small size to extend into, and the clamping groove is in communication with the engaging cavity.