Elastic clamping connecting piece, mechanical connector and precast pile connecting structure
By designing a locking surface at a certain angle on the inner wall of the spring clip of the spring clip connector and using a spring clip baffle structure, the problem of easy damage and slippage between the plug and the spring clip connector in the prior art is solved, and the connection pull-out resistance of the precast pile is improved.
Patent Information
- Application Number
- CN202422915158.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-27
AI Technical Summary
The existing spring-clip type mechanical joint is easily damaged when the plug is connected to the spring-clip connector, and is prone to axial slippage under the pulling force, which affects the connection performance of the precast pile.
Design a spring-loaded connector in which the two sides of the first spring-loaded retaining surface on the inner wall of the spring plate form a certain angle with the generatrix, thus forming a second spring-loaded retaining surface. Combined with a retaining spring and a baffle structure, the retaining area is increased and the direction of the force is changed, thereby improving the retaining performance.
The snap-fit performance between the plug and the spring is enhanced, the pull-out resistance of the precast pile connection is improved, and the axial slippage and damage of the plug and the spring are reduced.
Smart Images
Figure CN223468746U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to prefabricated pile connecting technical field especially a spring -loaded connector, mechanical joint and prefabricated pile connecting structure. BACKGROUND
[0002] In building construction, prefabricated pile butt joint is an indispensable process, in order to realize the quick connection of prefabricated pile, generally will set up mechanical joint at the both ends of prefabricated pile, and the quick connection between prefabricated piles is realized through the clamping of mechanical structure and better connecting performance is obtained.
[0003] In the prefabricated pile connection of mechanical joint, the spring -loaded mechanical joint is a kind of structure commonly used, as shown in Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 And Figure 13 , the spring -loaded mechanical joint includes plug rod 2 and spring -loaded connector 1, and the plug rod includes plug rod seat and the plug head set on the plug rod seat, the plug head is equipped with the plug head clamping surface of taper, the spring -loaded connector includes the connector body and the plurality of spring leafs arranged in the circumferential direction at the one end of the connector body, the inner wall surface of spring leaf is equipped with the first spring leaf clamping surface of taper, the plug head can be inserted into the spring -loaded connector and further realize the clamping of the first spring leaf clamping surface and the plug head clamping surface, further realize the clamping of the plug head and spring -loaded connector.
[0004] However, the spring -loaded mechanical joint of this structure still has the following problems: specifically, as shown in Figure 12, the spring -loaded mechanical joint of this structure needs the radial rebound hoop of spring leaf on the plug head to realize the clamping of the plug head and spring -loaded connector, therefore, before the plug head is inserted into the spring -loaded connector, the inner diameter of the hoop cavity formed by spring leaf needs to be less than or equal to the outer diameter of the plug head clamping surface, and further, when the spring leaf and the plug head are clamped, as shown in Figure 12 , the spring leaf clamping surface and the plug head clamping surface are generally in line contact (the two side edges of spring leaf clamping surface are clamped between the plug head clamping surface, A1-A8 in the figure), which not only causes the clamping part to be easily damaged, but also, when the mechanical joint is subjected to pulling force, since the pulling force and the force direction of the clamping part are consistent, the axial slip between the plug head and the spring -loaded connector is easily caused, affecting the connecting performance between prefabricated piles. INVENTION CONTENTS
[0005] The utility model provides a spring -loaded connector for the above problems.
[0006] The technical means adopted by the utility model are as follows:
[0007] A snap-fit connector comprises a connector body and a plurality of elastic pieces arranged circumferentially on one end of the connector body, an inner wall surface of the elastic piece is provided with a tapered first elastic piece clamping surface, two side edges of the first elastic piece clamping surface are at an angle with a generatrix of the first elastic piece clamping surface, so that a second elastic piece clamping surface is formed in the inner wall surface of the elastic piece.
[0008] Further, the angle between the two side edges of the first elastic piece clamping surface and the generatrix of the first clamping surface is 20-40°.
[0009] Further, the inner wall surface of the elastic piece is provided with a first elastic piece clamping surface to form a single-tapered snap-fit connector; or the inner wall surface of the elastic piece is provided with two layers of first elastic piece clamping surfaces to form a double-tapered snap-fit connector; or the inner wall surface of the elastic piece is provided with multiple layers of first elastic piece clamping surfaces to form a multi-tapered snap-fit connector.
[0010] Further, when the snap-fit connector is a double-tapered snap-fit connector or a multi-tapered snap-fit connector, the edge lines of the first elastic piece clamping surfaces of different layers are parallel.
[0011] Further, when the snap-fit connector is a double-tapered snap-fit connector or a multi-tapered snap-fit connector, the edge lines of the first elastic piece clamping surfaces of different layers are at an angle.
[0012] Further, the included angle of the projections of the adjacent side edge lines of the first elastic piece clamping surfaces of two adjacent elastic pieces on the plane of the end surface of the snap-fit connector is 60-120°.
[0013] A mechanical joint comprises a plug rod and the snap-fit connector described in the present application.
[0014] The plug rod comprises a plug rod seat and a plug head arranged on the plug rod seat, the plug head is provided with a plug head clamping surface for clamping with the elastic piece clamping surface, the plug head can be inserted into the snap-fit connector to realize clamping of the plug head with the snap-fit connector, and the edge line of the first elastic piece clamping surface is at an angle with the generatrix of the plug head clamping surface.
[0015] Further, it further comprises a clamping spring and a stop piece, the clamping spring is used to hoop on the outer wall of the elastic piece to limit the radial expansion of the elastic piece after the plug head is inserted into the snap-fit connector; the stop piece is used to make the clamping spring in a compressed state before the plug head is inserted into the snap-fit connector, and the compression of the clamping spring is released during the insertion of the plug head into the snap-fit connector, so that the clamping spring rebounds to hoop on the outer wall of the elastic piece to limit the radial expansion of the elastic piece.
[0016] A prefabricated pile connecting structure, comprising a first end head plate and a second end head plate arranged at both ends of the prefabricated pile, and further comprising the mechanical joint described in the application, the plug rod is connected with the first end head plate, and the elastic clamping connector is connected with the second end head plate; or,
[0017] A prefabricated pile connecting structure, comprising a first end head plate and a second end head plate arranged at both ends of the prefabricated pile, and further comprising the mechanical joint described in the application, the plug rod is connected with the first end head plate, and the elastic clamping connector is connected with the second end head plate; or,
[0018] Further, the end of the prefabricated pile provided with the second end head plate is further provided with the clamping spring and the blocking piece; or, the second nut sleeve is further provided with the clamping spring and the blocking piece.
[0019] Compared with the prior art, the elastic clamping connector disclosed in the application has the following beneficial effects: the two side edges of the first elastic clamping surface on the inner wall of the elastic sheet are arranged as lines that are at a certain angle with the generatrix of the first elastic clamping surface, so that a second elastic clamping surface is formed in the inner wall surface of the elastic sheet, not only the clamping area of the elastic clamping connector and the plug is increased, but also the direction of the force of the two side edges of the elastic clamping surface and the plug clamping surface of the plug is changed, thereby improving the clamping performance of the plug rod and the elastic clamping connector, and the pull-out resistance of the prefabricated pile connection is improved. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a structure diagram of the elastic clamping connector disclosed in the application, and the drawing is a double-cone elastic clamping connector;
[0021] Figure 2 It is a structure diagram of the plug rod in the application;
[0022] Figure 3 It is a right view of the elastic clamping connector in the application;
[0023] Figure 4 It is a structure diagram of the mechanical joint disclosed in the application;
[0024] Figure 5 It is a structure diagram of the mechanical joint with the clamping spring and the blocking piece disclosed in the application;
[0025] Figure 6 It is a schematic view of the clamping spring hoop on the outer wall of the elastic sheet;
[0026] Figure 7 It is a structure diagram of the first prefabricated pile connecting structure disclosed in the application;
[0027] Figure 8 It is a structure diagram of the second prefabricated pile connecting structure disclosed in the application;
[0028] Figure 9 is a structural diagram of an existing snap-in mechanical joint;
[0029] Figure 10 is a structural diagram of a snap-in connecting piece of an existing snap-in mechanical joint;
[0030] Figure 11 is a right view of Figure 10 ;
[0031] Figure 12 is a sectional view at C-C of Figure 9 ;
[0032] Figure 13 is a schematic diagram of force acting on the plug when the existing snap-in mechanical joint is subjected to a pulling force.
[0033] In the figure: 1, snap-in connecting piece; 10, connecting piece body; 11, spring piece; 12, first spring piece clamping surface; 13, edge line of first spring piece clamping surface; 14, second spring piece clamping surface; 15, generatrix of first spring piece clamping surface; 2, plug rod; 20, plug rod seat; 21, plug; 22, plug clamping surface; 23, generatrix of plug clamping surface; 3, clamping spring; 4, stop piece; 41, stop piece body; 42, stop arm; 50, first end plate; 51, second end plate; 52, accommodating hole; 60, first sleeve; 61, second sleeve; 7, precast pile; 8, precast pile main reinforcement. DETAILED DESCRIPTION
[0034] As Figure 1 shown, the utility model discloses a snap-in connecting piece 1, including connecting piece body 10 and setting in the connecting piece body 10 one end and along the circumferential arrangement of multiple spring pieces 11 of connecting piece body 10, the inner wall surface of spring piece 11 is equipped with the first spring piece clamping surface 12 of taper, two side edge lines 13 of first spring piece clamping surface 12 with the generatrix 15 of first spring piece clamping surface is a certain angle, so that the second spring piece clamping surface 14 is formed in the inner wall surface of spring piece 11.
[0035] Specifically, the snap-in connecting piece 1 is an integral structure, one end of the snap-in connecting piece 1 is a sleeve structure connecting piece body 10, the other end is formed by a plurality of openings machined from the end to one side of the connecting piece body to form spring pieces, the outer diameter of the spring pieces 11 gradually decreases from one end connected to the connecting piece body 10 to the other end (free end), the inner wall surface of the spring pieces 11 is provided with the first spring piece clamping surface 12 with a certain taper, in this application, the two side edge lines 13 of the first spring piece clamping surface 12 are machined to be at a certain angle with the generatrix of the first spring piece clamping surface, thereby forming the second spring piece clamping surface 14 in the inner wall surface of the spring pieces 11, as Figure 1As shown, when the elastic clamping connecting piece 1 of the present application is clamped with the plug 21 of the insertion rod 2, since the two side edge lines 13 of the first elastic clamping surface 12 are processed at a certain angle with the generatrix of the first elastic clamping surface, so that the inner wall surface of the elastic sheet 11 forms a second elastic clamping surface 14, thereby increasing the contact area of the elastic clamping surface and the plug clamping surface 22 of the plug 21. At the same time, the edge line 13 of the first elastic clamping surface 12 and the clamping line of the plug clamping surface 22 are at a certain angle with the generatrix 23 of the plug clamping surface, which changes the direction of the force between the edge line 13 of the first elastic clamping surface 12 and the plug clamping surface 22, as shown in Figure 13 As shown, when the elastic clamping connecting piece 1 of the present application is clamped with the plug 21 of the insertion rod 2, since the two side edge lines 13 of the first elastic clamping surface 12 are processed at a certain angle with the generatrix of the first elastic clamping surface, so that the inner wall surface of the elastic sheet 11 forms a second elastic clamping surface 14, thereby increasing the contact area of the elastic clamping surface and the plug clamping surface 22 of the plug 21. At the same time, the edge line 13 of the first elastic clamping surface 12 and the clamping line of the plug clamping surface 22 are at a certain angle with the generatrix 23 of the plug clamping surface, which changes the direction of the force between the edge line 13 of the first elastic clamping surface 12 and the plug clamping surface 22, as shown in Figure 2 As shown, when the elastic clamping connecting piece 1 of the present application is clamped with the plug 21 of the insertion rod 2, since the two side edge lines 13 of the first elastic clamping surface 12 are processed at a certain angle with the generatrix of the first elastic clamping surface, so that the inner wall surface of the elastic sheet 11 forms a second elastic clamping surface 14, thereby increasing the contact area of the elastic clamping surface and the plug clamping surface 22 of the plug 21. At the same time, the edge line 13 of the first elastic clamping surface 12 and the clamping line of the plug clamping surface 22 are at a certain angle with the generatrix 23 of the plug clamping surface, which changes the direction of the force between the edge line 13 of the first elastic clamping surface 12 and the plug clamping surface 22, as shown in
[0036] Further, as shown, the angle a between the two side edge lines 13 of the first elastic clamping surface 12 and the generatrix 15 of the first clamping surface is 20°-40°, so that the insertion rod and the elastic clamping connecting piece can obtain better clamping performance. Figure 1
[0037] As shown, the angle a between the two side edge lines 13 of the first elastic clamping surface 12 and the generatrix 15 of the first clamping surface is 20°-40°, so that the insertion rod and the elastic clamping connecting piece can obtain better clamping performance. Figure 1 and Figure 2 As shown, in the present application, the inner wall surface of the elastic sheet 11 is provided with two layers of first elastic sheet clamping surfaces 12 to form a double-tapered elastic clamping connector, and correspondingly, the plug 21 is provided with two layers of plug clamping surfaces to form a double-tapered plug, so that the plug and the elastic clamping connector have a larger contact area, thereby increasing the clamping performance; in the present application, the inner wall surface of the elastic sheet 11 can also be provided with one layer of first elastic sheet clamping surface 12 to form a single-tapered elastic clamping connector, and correspondingly, the plug 21 is provided with one layer of plug clamping surface to form a single-tapered plug, so as to facilitate processing and clamping; in the present application, the inner wall surface of the elastic sheet 11 can also be provided with multiple layers of first elastic sheet clamping surface 12 to form a multi-tapered elastic clamping connector, and correspondingly, the plug 21 is provided with multiple layers of plug clamping surface to form a multi-tapered plug, so as to further increase the contact area between the plug and the elastic clamping connector, thereby increasing the clamping performance.
[0038] Further, when the elastic clamping connector 1 is a double-tapered elastic clamping connector or a multi-tapered elastic clamping connector, the edge lines 13 of the first elastic sheet clamping surfaces of different layers are parallel.
[0039] Specifically, in the present application, the two side edge lines 13 of the first elastic sheet clamping surface 12 form a certain angle with the generatrix 15 of the first elastic sheet clamping surface, which can be formed by stamping and wire cutting and other processing methods, that is, by stamping or wire cutting and other methods in the circular hole of the elastic clamping connector to process a square or other shaped hole, thereby making the two side edge lines 13 of the first elastic sheet clamping surface 12 form a certain angle with the generatrix 15 of the first elastic sheet clamping surface. In the present embodiment, when the elastic clamping connector 1 is a double-tapered elastic clamping connector or a multi-tapered elastic clamping connector, the edge lines 13 of the first elastic sheet clamping surfaces of different layers are parallel, which can facilitate processing.
[0040] Further, when the elastic clamping connector 1 is a double-tapered elastic clamping connector or a multi-tapered elastic clamping connector, the edge lines 13 of the first elastic sheet clamping surfaces of different layers form a certain angle.
[0041] Specifically, in the present embodiment, when the elastic clamping connector 1 is a double-tapered elastic clamping connector or a multi-tapered elastic clamping connector, the edge lines 13 of the first elastic sheet clamping surfaces of different layers form a certain angle, that is, the angles formed by the edge lines 13 of the first elastic sheet clamping surfaces of different layers and the generatrix of the first elastic sheet clamping surface are different, thereby the directions of the action force of the first elastic sheet clamping surfaces of different layers and the plug are different when the plug rod and the elastic clamping connector are subjected to a pulling force, thereby further increasing the clamping performance between the plug and the elastic sheet.
[0042] Further, as shown, Figure 3 the projection of the adjacent side edge line 13 of the first elastic sheet clamping surface 12 of the adjacent two elastic sheets 11 on the plane of the end surface of the elastic clamping connector 1 forms an included angle b of 60°-120°, so that the elastic clamping connector and the plug can obtain better clamping performance.
[0043] As Figure 4 The utility model discloses a mechanical joint, including the plug stick 2 and the elastic card connecting piece 1 described in the application,
[0044] The plug stick 2 includes plug stick seat 20 and the plug 21 of setting on the plug stick seat 20, be equipped with the plug card fixed surface 22 for with the elastic sheet card fixed surface of plug 21, the plug 21 can be inserted into the elastic card connecting piece 1 realizes the card of plug 21 with the elastic card connecting piece 1, and the edge line 13 of the first elastic sheet card fixed surface 12 and the busbar 23 of plug card fixed surface are connected at a certain angle, the utility model discloses a mechanical joint, the elastic card connecting piece is through the first elastic sheet card fixed surface of the two side edge lines on the inner wall of its elastic sheet and is set into the busbar of the first elastic sheet card fixed surface at a certain angle, makes the second elastic sheet card fixed surface in the inner wall surface of elastic sheet, not only increases the card area of elastic card connecting piece and plug, changes the direction of the force of the two side edges of elastic sheet card fixed surface and the plug card fixed surface of plug simultaneously, and then improves the card performance of plug stick and elastic card connecting piece, thereby improve the pullout resistance of prefabricated pile connection.
[0045] Further, it also includes a clamp spring 3, which is used to hoop on the outer wall of the elastic sheet 11 after the plug 21 is inserted into the elastic card connecting piece 1 to limit the radial expansion of the elastic sheet 11.
[0046] Specifically, as Figure 5 And Figure 6 Before the plug is inserted into the elastic card connecting piece, the clamp spring 3 is arranged on the free end side of the elastic sheet (at this time, the clamp spring is not hooped on the outer wall of the elastic sheet), during the insertion of the plug into the elastic card connecting piece, the elastic sheet is radially expanded under the action of the plug and realizes the card of the elastic sheet and the plug, after the card of the elastic sheet and the plug, the clamp spring 3 is hooped on the outer wall of the elastic sheet, and then the hoop force of the clamp spring can prevent the elastic sheet from being radially expanded again, thereby improving the connection performance.
[0047] Further, it also includes a stop sheet 4, which is used to make the clamp spring 3 in a compressed state before the plug 21 is inserted into the elastic card connecting piece 1, and release the compression of the clamp spring 3 during the insertion of the plug 21 into the elastic card connecting piece 1, so that the clamp spring 3 rebounds and hoops on the outer wall of the elastic sheet 11 to limit the radial expansion of the elastic sheet 11.
[0048] Specifically, before the plug is inserted into the snap connection, the free end of the elastic sheet and the snap spring are further provided with a stop sheet 4, which can ensure that the snap spring is in a compressed state before the plug is inserted into the snap connection, and the compression of the snap spring 3 is released during the insertion of the plug into the snap connection, so that the snap spring can rebound to be clamped on the outer wall of the elastic sheet after the plug is inserted into the snap connection. In this embodiment, the stop sheet 4 includes a stop sheet body 41 and three or more stop arms 42 provided on the stop sheet body 41. In order to release the stop of the stop sheet 4 on the spring 3 during the insertion process, the stop arms 42 can be bent or broken. Specifically, the diameter of the circumscribed circle of the stop sheet 4 is greater than the inner diameter of the spring, and preferably the diameter of the circumscribed circle of the stop sheet 4 is equal to the outer diameter of the spring. The material of the stop sheet 4 is plastic or rubber. In a preferred embodiment, the stop sheet 4 is made of rubber.
[0049] As shown in Figure 7 The first embodiment of the prefabricated pile connecting structure of the utility model is shown, which comprises a first end plate 50 and a second end plate 51 arranged at both ends of the prefabricated pile, and further comprises the mechanical joint described in the application. The plug rod 2 is connected with the first end plate 50, and the snap connection 1 is connected with the second end plate 51.
[0050] Specifically, the first end plate and the second end plate are both provided with a main reinforcement anchoring hole and a tension hole. The first end plate and the second end plate are arranged at both ends of the prefabricated pile and are connected with both ends of the prefabricated pile main reinforcement in the prefabricated pile through the main reinforcement anchoring hole. The plug rod seat of the plug rod is provided with external threads, and the plug rod seat is connected with the tension hole on the first end plate. The outer wall of the connecting body of the snap connection is provided with external threads, and the snap connection is connected with the tension hole of the second end plate. The prefabricated pile body is provided with a receiving hole 52 at a position corresponding to the tension hole at one end of the second end plate. After the snap connection is connected with the second end plate, the elastic sheet part of the snap connection is placed in the receiving hole and can be radially expanded in the receiving hole. The two adjacent prefabricated piles can be quickly connected through the mechanical joint disclosed in the application, and have significant anti-pulling performance.
[0051] Further, the prefabricated pile 7 is further provided with the snap spring 3 and the stop sheet 4 at one end of the second end plate 51.
[0052] Specifically, the snap spring and the stop sheet are further arranged in the receiving hole. Before the plug rod is inserted into the snap connection, the snap spring is compressed under the action of the stop sheet and the free end of the snap connection. During the insertion of the plug rod into the snap connection, the stop sheet is damaged by the impact force of the plug, thereby releasing the compression of the snap spring, so that the snap spring rebounds to be clamped on the outer wall of the elastic sheet, limiting the radial expansion of the elastic sheet again, and improving the clamping performance of the plug and the snap connection.
[0053] As shown in Figure 8As shown is another embodiment of the prefabricated pile connecting structure disclosed in the application, comprising a first nut sleeve 60 and a second nut sleeve 61 arranged at both ends of the prefabricated pile main reinforcement 8, and further comprising the mechanical joint described in the application, the inserting rod 2 is connected with the first nut sleeve 60, and the elastic clamping connector 1 is connected with the second nut sleeve 61.
[0054] Specifically, one end of the first nut sleeve is a main reinforcement connecting end, and the other end is an inserting rod connecting end, one end of the second nut sleeve is a main reinforcement connecting end, and the other end is an elastic clamping end, the first nut sleeve and the second nut sleeve are arranged at both ends of the prefabricated pile and connected with the prefabricated pile main reinforcement 8, the inserting rod connecting end of the first nut sleeve is connected with the inserting rod, the elastic clamping end of the second nut sleeve is connected with the elastic clamping connector, the elastic sheet of the elastic clamping connector is placed in the second nut sleeve and can be radially expanded, and the adjacent two sections of the prefabricated pile can be quickly connected through the mechanical joint disclosed in the application, and have significant anti-pulling performance.
[0055] Further, the second nut sleeve 61 is further provided with the clamping spring 3 and the blocking sheet 4.
[0056] Specifically, the second nut sleeve is further provided with the clamping spring and the blocking sheet, before the inserting rod is inserted into the elastic clamping connector, the clamping spring is compressed under the action of the blocking sheet and the free end of the elastic clamping connector, in the process of inserting the inserting rod into the elastic clamping connector, the blocking sheet is damaged by the impact force of the plug, and then the compression of the clamping spring is released, so that the clamping spring rebounds and is clamped on the outer wall of the elastic sheet, limiting the radial expansion of the elastic sheet again, and improving the clamping performance of the plug and the elastic clamping connector.
[0057] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed in the present application, which should be covered in the protection scope of the present application.
Claims
1. A spring-loaded connector, comprising a connector body (10) and a plurality of spring pieces (11) provided at one end of the connector body (10) and arranged circumferentially along the connector body (10), wherein the inner wall surface of the spring piece (11) is provided with a tapered first spring piece fixing surface (12), characterized in that: The two side edge lines (13) of the first elastic sheet clamping surface (12) are at an angle with the generatrix (15) of the first elastic sheet clamping surface, so that a second elastic sheet clamping surface (14) is formed in the inner wall surface of the elastic sheet (11).
2. The snap connector according to claim 1, wherein: The angle between the two side edge lines (13) of the first elastic sheet clamping surface (12) and the generatrix (15) of the first elastic sheet clamping surface is 20°-40°.
3. The snap connector according to claim 1 or 2, characterized in that: The inner wall surface of the elastic sheet (11) is provided with a first elastic sheet clamping surface (12) to form a single-cone elastic sheet clamping connector; or the inner wall surface of the elastic sheet (11) is provided with two first elastic sheet clamping surfaces (12) to form a double-cone elastic sheet clamping connector; or the inner wall surface of the elastic sheet (11) is provided with multiple first elastic sheet clamping surfaces (12) to form a multi-cone elastic sheet clamping connector.
4. The snap connector of claim 3, wherein: When the elastic sheet clamping connector (1) is a double-cone elastic sheet clamping connector or a multi-cone elastic sheet clamping connector, the edge lines (13) of the first elastic sheet clamping surfaces (12) of different layers are parallel; when the elastic sheet clamping connector (1) is a double-cone elastic sheet clamping connector or a multi-cone elastic sheet clamping connector, the edge lines (13) of the first elastic sheet clamping surfaces (12) of different layers are at an angle.
5. The snap connector of claim 1, wherein: The included angle between the adjacent side edge lines (13) of the first elastic sheet clamping surfaces (12) of two adjacent elastic sheets (11) in the projection of the end face of the elastic sheet clamping connector (1) is 60°-120°.
6. A mechanical joint characterized by: The elastic sheet clamping connector (1) of any one of claims 1-5 and a plug rod (2) are included. The plug rod (2) includes a plug rod base (20) and a plug (21) arranged on the plug rod base (20), the plug (21) is provided with a plug clamping surface (22) for clamping with the elastic sheet clamping surface, the plug (21) can be inserted into the elastic sheet clamping connector (1) to realize clamping of the plug (21) and the elastic sheet clamping connector (1), and the edge lines (13) of the first elastic sheet clamping surface (12) are at an angle with the generatrix (23) of the plug clamping surface.
7. The mechanical joint of claim 6, wherein: A clamping spring (3) and a stop sheet (4) are further included, the clamping spring (3) is used to be clamped on the outer wall of the elastic sheet (11) to limit the radial expansion of the elastic sheet (11) after the plug (21) is inserted into the elastic sheet clamping connector (1). The stop sheet (4) is used to make the clamping spring (3) in a compressed state before the plug (21) is inserted into the elastic sheet clamping connector (1), and the compression of the clamping spring (3) is released during the insertion of the plug (21) into the elastic sheet clamping connector (1), so that the clamping spring (3) rebounds and clamps on the outer wall of the elastic sheet (11) to limit the radial expansion of the elastic sheet (11).
8. A precast pile connection structure, characterized by: A first end head plate (50) and a second end head plate (51) are arranged at both ends of the precast pile, and the mechanical joint of claim 6 or 7 is further included, the plug rod (2) is connected with the first end head plate (50), and the elastic sheet clamping connector (1) is connected with the second end head plate (51); or The first nut sleeve (60) and the second nut sleeve (61) are arranged at both ends of the precast pile main reinforcement (8), and the mechanical joint in claim 6 or 7 is further provided, the inserting rod (2) is connected with the first nut sleeve (60), and the elastic clamping connector (1) is connected with the second nut sleeve (61).
9. A precast pile connection structure according to claim 8, characterised in that: The precast pile is provided with the clamping spring (3) and the blocking piece (4) at one end of the second end head plate (51). The second nut sleeve (61) is further provided with the clamping spring (3) and the blocking piece (4).