Spring clamping nut, triangular spring mechanical connector and precast pile connecting structure

Abstract

The utility model discloses a spring clamping nut, a triangular spring mechanical joint and a precast pile connecting structure, and the spring clamping nut comprises a female spring clamping nut body and a plug; external threads are arranged on the outer side wall of the spring clamping nut body, a clamping spring containing groove of a spiral groove structure is formed in the spring clamping nut body, a plug mounting groove is further formed in the end, away from the insertion end of the positioning insertion rod, of the spring clamping nut body, and a plug is mounted in the plug mounting groove; and the clamping spring accommodating groove starts from the plug mounting groove and ends at the inner side of the end surface of one end of the insertion end of the positioning insertion rod. The clamping spring containing groove of the spiral groove structure in the spring clamping nut starts from the plug containing groove and ends at the inner side of one end of the inserting end of the inserting rod, and the two ends of the triangular clamping spring are plugged through the plug, so that even if the inserting rod is set to be subjected to axial acting force, the clamping spring containing groove can not be blocked. And the positioning insertion rod and the triangular clamping spring can be effectively limited in the spring clamping nut, so that the connection performance of the mechanical joint is improved.

Description

Technical Field

[0001] This utility model relates to the field of precast pile connection technology, and in particular to a spring snap nut, a triangular spring mechanical joint, and a precast pile connection structure. Background Technology

[0002] In building construction, the connection of precast piles is an essential process. To achieve rapid connection between concrete piles, prior patent application 202422406996.8 disclosed a mechanical joint for end-plate anchoring triangular springs, such as... Figure 9 As shown, the mechanical connector includes a positioning rod 3, a spring-loaded snap-fit ​​nut 1, and a triangular snap-fit ​​spring 2. The plug of the positioning rod 3 is provided with helical snap-fit ​​teeth, and the spring-loaded snap-fit ​​nut is provided with a snap-fit ​​spring receiving groove with a helical groove structure. The triangular snap-fit ​​spring is placed in the snap-fit ​​spring receiving groove. The plug of the positioning rod can be inserted into the spring-loaded snap-fit ​​nut so that the triangular snap-fit ​​spring is clamped in the helical snap-fit ​​teeth of the plug, thereby realizing the snap-fit ​​connection between the positioning rod and the spring-loaded snap-fit ​​nut.

[0003] However, this mechanical joint also has the following problems: the spring receiving groove of the spiral groove structure of the spring snap nut in this mechanical joint is formed starting from the end into which the insert rod is inserted. Therefore, after the positioning insert rod is inserted into the spring snap nut and snaps with the triangular snap spring in the spring receiving groove, when the positioning insert rod is subjected to axial force, the positioning insert rod and the triangular snap spring are prone to move axially along the spring receiving groove or even be pulled out, thus affecting the connection performance of the mechanical joint. Utility Model Content

[0004] This utility model addresses the above-mentioned problems by proposing a spring-loaded snap-fit ​​nut.

[0005] The technical means adopted in this utility model are as follows:

[0006] A spring-loaded snap nut includes a spring-loaded snap nut body and a plug;

[0007] The outer wall of the spring snap nut body is provided with an external thread for connecting with the end plate / nut sleeve of the precast pile. The body of the spring snap nut is provided with a snap spring receiving groove for accommodating the triangular snap spring. The snap spring receiving groove is a spiral groove.

[0008] The spring-loaded nut body is further provided with a plug mounting groove at one end away from the insertion end of the positioning rod, and the plug is installed in the plug mounting groove;

[0009] The spiral starting end of the snap-fit ​​spring receiving groove begins at the plug mounting groove, and the spiral ending end of the snap-fit ​​spring receiving groove terminates at the inner side of the end face of one end of the positioning rod insertion end, so that the spring snap-fit ​​nut body forms a stop part near the positioning rod insertion end for axially stopping the triangular snap-fit ​​spring.

[0010] Furthermore, the plug is threadedly connected to the spring-loaded snap-fit ​​nut body.

[0011] Furthermore, the plug is also provided with an injection hole.

[0012] Furthermore, the spring-loaded snap nut body is provided with a sawtooth thread structure, the groove of the sawtooth thread structure is the snap spring receiving groove, and the non-working side of the sawtooth thread structure is the snap surface.

[0013] Furthermore, the angle between the non-working side and the working side of the sawtooth thread structure is 60°.

[0014] Furthermore, the pitch of the sawtooth thread structure is 5mm-6mm.

[0015] Furthermore, the end of the spring-loaded nut body near the insertion end of the positioning rod is also provided with a spring-loaded nut tightening structure and / or a guide surface.

[0016] A triangular spring mechanical connector includes: a positioning rod, a triangular snap-fit ​​spring, and the spring snap-fit ​​nut described in this application;

[0017] The triangular snap-fit ​​spring is placed in the snap-fit ​​spring receiving groove of the spring snap-fit ​​nut;

[0018] The positioning rod can be inserted into the spring-loaded nut and engaged with the spring-loaded nut by the triangular spring.

[0019] A precast pile connection structure includes: a precast pile body, end plates disposed at both ends of the precast pile body, and the triangular spring mechanical joint described in this application.

[0020] The positioning rod is installed on the end plate at one end, and the spring snap nut is installed on the end plate at the other end. The triangular snap spring is placed in the snap spring receiving groove of the spring snap nut.

[0021] Adjacent precast pile sections are secured together by the positioning rod, the triangular snap-fit ​​spring, and the spring snap-fit ​​nut.

[0022] A precast pile connection structure includes: a precast pile body, a first nut sleeve, a second nut sleeve, and the triangular spring mechanical joint described in this application;

[0023] The first nut sleeve and the second nut sleeve are respectively installed at both ends of the main reinforcement of the precast pile body. The positioning rod is installed in the first nut sleeve, and the spring snap nut is installed in the second nut sleeve. The triangular snap spring is placed in the snap spring receiving groove of the spring snap nut.

[0024] Adjacent precast pile sections are secured together by the positioning rod, the triangular snap-fit ​​spring, and the spring snap-fit ​​nut.

[0025] Compared with the prior art, the spring snap nut disclosed in this utility model has the following beneficial effects: The snap spring receiving groove of the spiral groove structure in the spring snap nut of this application starts at the plug receiving groove at the end away from the insertion of the plug rod and ends at the inner side of the insertion end of the plug rod. At the same time, a plug is provided so that both ends of the triangular snap spring are blocked, so that even when the plug rod is subjected to axial force, the positioning plug rod and the triangular snap spring can still be effectively restricted in the spring snap nut, thereby improving the connection performance of the mechanical joint. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the spring-loaded snap nut disclosed in this utility model;

[0027] Figure 2 This is a structural diagram of the spring snap nut body in the spring snap nut disclosed in this utility model;

[0028] Figure 3 A structural diagram of a triangular spring mechanical joint having the spring snap-fit ​​nut disclosed in this utility model;

[0029] Figure 4 Here is a structural diagram of the positioning pin;

[0030] Figure 5 This is a structural diagram of a triangular spring;

[0031] Figure 6 This is a structural diagram of a first embodiment of a precast pile connection structure using the triangular spring mechanical joint disclosed in this utility model.

[0032] Figure 7 China Figure 6 Structural diagram showing the connection of the middle plate section;

[0033] Figure 8 This is a structural diagram of a second embodiment of a precast pile connection structure using the triangular spring mechanical joint disclosed in this utility model.

[0034] Figure 9 This is a structural diagram of a prior art triangular spring mechanical joint used for end plate anchoring.

[0035] In the diagram: 1. Spring-loaded snap-fit ​​nut; 10. Spring-loaded snap-fit ​​nut body; 11. Plug; 12. External thread; 13. Snap-fit ​​spring receiving groove; 14. Plug mounting groove; 15. Injection hole; 16. Snap-fit ​​surface; 17. Spring-loaded snap-fit ​​nut tightening structure; 18. Guide surface; 19. Stop part; 2. Triangular snap-fit ​​spring; 3. Positioning rod; 30. Positioning rod seat; 31. Plug; 32. First snap-fit ​​tooth; 33. First snap-fit ​​surface; 4. Precast pile body; 40. End plate; 41. Main reinforcement; 42. Positioning rod connecting hole; 43. Spring-loaded snap-fit ​​nut connecting hole; 50. First nut sleeve; 51. Second nut sleeve. Detailed Implementation

[0036] like Figure 1 and Figure 2 As shown, the spring snap nut 1 disclosed in this utility model includes a spring snap nut body 10 and a plug 11;

[0037] The outer wall of the spring snap nut body 10 is provided with an external thread 12 for connecting with the end plate / nut sleeve of the precast pile. The spring snap nut body 10 is provided with a snap spring receiving groove 13 for accommodating the triangular snap spring 2. The snap spring receiving groove 13 is a spiral groove.

[0038] The spring snap nut body 10 is provided with a plug mounting groove 14 at one end away from the insertion end of the positioning rod 3, and the plug 11 is installed in the plug mounting groove 14;

[0039] The spiral starting end of the snap-fit ​​spring receiving groove 13 begins at the plug mounting groove 14, and the spiral ending end of the snap-fit ​​spring receiving groove 13 ends at the inner side of the end face of the insertion end of the positioning rod 3, so that the spring snap-fit ​​nut body 10 forms a stop part 19 for axially stopping the triangular snap-fit ​​spring near the insertion end of the positioning rod 3.

[0040] Specifically, in this embodiment, the spring-loaded nut body 10 is a sleeve structure. External threads are machined on the outer wall of the spring-loaded nut body 10, and a spiral groove is machined inside the spring-loaded nut body 10. The spiral groove is a spring-loaded receiving groove 13 for accommodating the triangular spring-loaded spring 2. A plug mounting groove 14 is provided at the end of the spring-loaded nut body 10 away from the insertion end of the positioning rod 3. The plug 11 is installed in the plug mounting groove 14. The spiral groove structure of the spring-loaded receiving groove starts at the plug mounting groove and ends at the inner side of the end face of the insertion end of the positioning rod. That is, the end of the spring-loaded receiving groove is a certain distance from the end face of the insertion end of the positioning rod, so that the spring-loaded nut body 10 forms a stop portion 19 near the insertion end of the positioning rod 3 for axially stopping the triangular spring-loaded spring. The specific length of the stop portion depends on the actual machining. The required setting is generally 1-5mm. The triangular snap-fit ​​spring is inserted into the snap-fit ​​spring receiving groove from the end with the plug mounting groove, and then the plug is installed to restrict it in the snap-fit ​​spring receiving groove. In this application, the snap-fit ​​spring receiving groove of the spiral groove structure in the spring snap-fit ​​nut starts at the plug receiving groove at the end away from the insertion of the insertion rod and ends at the inner side of the insertion end of the insertion rod. This makes the spring snap-fit ​​nut body 10 form a stop part 19 for axially stopping the triangular snap-fit ​​spring near the insertion end of the positioning insertion rod 3. At the same time, a plug is also provided so that both ends of the triangular snap-fit ​​spring are stopped. This ensures that even when the positioning insertion rod is subjected to axial force, the positioning insertion rod and the triangular snap-fit ​​spring can still be effectively restricted in the snap-fit ​​spring receiving groove in the spring snap-fit ​​nut, thereby improving the connection performance of the mechanical joint.

[0041] Furthermore, the plug 11 is threadedly connected to the spring-loaded snap nut body 10.

[0042] Specifically, the plug 11 can be a structure such as an elastic retaining ring, and the plug 11 is engaged in the plug mounting groove to restrict the position of the triangular retaining spring. Preferably, the outer side wall of the plug 11 is provided with threads, and the inner side wall of the plug mounting groove 14 is also provided with threads. The plug 11 is threadedly installed in the plug mounting groove 14, and the threaded connection structure facilitates installation.

[0043] Furthermore, the plug 11 is also provided with an injection hole 15.

[0044] Specifically, in this embodiment, the plug 11 is a ring structure with threads on the outer wall of the ring structure. The central hole of the ring structure forms an injection hole 15. The injection hole 15 not only facilitates the injection of epoxy resin and other structural adhesives into the mechanical joint during connection, but also serves as a clearance structure and positioning structure for the positioning rod, ensuring that the positioning rod can be effectively inserted into the spring snap nut and snapped with the triangular snap spring.

[0045] Furthermore, the spring snap-fit ​​nut body 10 is provided with a sawtooth thread structure, the groove of the sawtooth thread structure is the snap-fit ​​spring receiving groove 13, and the non-working side of the sawtooth thread structure is the snap-fit ​​surface 16.

[0046] Specifically, in this embodiment, the spring-loaded nut has a sawtooth thread structure, the groove of which serves as a spring receiving groove, and the non-working side of which serves as the engagement surface. The plug of the positioning rod has a sawtooth thread structure, which is a double-threaded sawtooth thread. The working side of the double-threaded sawtooth thread structure serves as the first engagement surface. This results in a large contact area between the triangular spring and the engagement surfaces on both the plug and the spring-loaded nut. Furthermore, the engagement parts of both the spring-loaded nut and the plug have high strength, thereby improving the pull-out resistance of the pile connection.

[0047] Furthermore, the angle between the non-working side and the working side of the sawtooth thread structure is 60°.

[0048] Specifically, the angle between the non-working side and the working side of the sawtooth thread structure is 60°, which gives the positioning rod, the snap-fit ​​spring, and the spring snap-fit ​​nut good stress performance, thereby improving the pull-out strength.

[0049] Furthermore, the pitch of the sawtooth thread structure is 5mm-6mm.

[0050] Specifically, the tooth pitch of the sawtooth thread structure of the snap-fit ​​spring receiving groove 20 and the pitch of the triangular snap-fit ​​spring are both 5mm-6mm, and the tooth pitch on the plug of the positioning rod is 2.5mm-3mm. After testing, the strength of the snap-fit ​​teeth corresponding to this tooth pitch, the snap-fit ​​spring receiving groove corresponding to the tooth pitch, and the triangular snap-fit ​​spring corresponding to the pitch after snap-fit ​​is greater than or equal to the requirements for the connection strength of precast piles in the relevant standards.

[0051] Furthermore, the spring snap nut body 10 is provided with a spring snap nut tightening structure 17 and / or a guide surface 18 at the end near the insertion of the positioning rod 3.

[0052] Specifically, the spring-loaded nut tightening structure 17 may have a slotted or polygonal groove at the end of the spring-loaded nut near the plug insertion end, facilitating quick connection of the spring-loaded nut to the end plate using a power tool with a slotted or polygonal screwdriver; the plug end has a polygonal hole, allowing quick connection of the positioning rod to the end plate using a power tool with a polygonal screwdriver. A guide surface 18 may also be provided at the end of the spring-loaded nut body 10 near the insertion end of the positioning rod 3, guiding the positioning rod 3 during insertion and facilitating easy insertion of the positioning rod into the spring-loaded nut.

[0053] like Figure 3 , Figure 4 and Figure 5 As shown, the triangular spring mechanical connector disclosed in this utility model includes: a positioning rod 3, a triangular snap-fit ​​spring 2, and the spring snap-fit ​​nut 1 described in this application;

[0054] The triangular snap-fit ​​spring 2 is placed in the snap-fit ​​spring receiving groove 13 of the spring snap-fit ​​nut 1;

[0055] The positioning rod 3 can be inserted into the spring-loaded nut 1 and engaged with the spring-loaded nut 1 by the triangular spring 2.

[0056] Specifically, the positioning rod 3 includes a positioning rod seat 30 and a plug 31 disposed on the positioning rod seat 30. The plug 31 is provided with a first locking tooth 32, and the first locking tooth 32 is provided with a locking surface 33. The triangular locking spring 2 is a helical spring with an equilateral triangular cross-section. The locking spring receiving groove 13 in the spring locking nut 1 is a helical groove. In this embodiment, the first locking tooth on the plug is a double-helical sawtooth thread structure, and the locking spring receiving groove 13 is a groove with a sawtooth thread structure. When the plug 31 is inserted into the spring locking nut 1, the triangular locking spring 2 can open radially in the locking spring receiving groove 13 and clamp in the first locking tooth 32. The positioning rod 3 and the spring locking nut 1 are locked together through the first locking surface 33, the locking surface in the locking spring receiving groove, and the triangular locking spring 2. The cross-sectional structure of the positioning rod, the triangular snap-fit ​​spring, and the snap-fit ​​spring receiving groove in the spring snap-fit ​​nut in this embodiment is the same as or similar to that of the prior patent application 202422406996.8. The snap-fit ​​principle of the mechanical joint is also the same, and will not be described in detail here.

[0057] like Figure 6 and Figure 7 As shown, an embodiment of a precast pile connection structure disclosed in this utility model includes: a precast pile body 4, end plates 40 disposed at both ends of the precast pile body 4, and the triangular spring mechanical joint described in this application.

[0058] The positioning rod 3 is installed on the end plate 40 at one end, and the spring snap nut 1 is installed on the end plate 40 at the other end. The triangular snap spring 2 is placed in the snap spring receiving groove 13 of the spring snap nut 1.

[0059] The adjacent precast piles are secured together by the positioning rod 3, the triangular snap-fit ​​spring 2, and the spring snap-fit ​​nut 1.

[0060] Specifically, the precast pile with end plates includes a precast pile body 4, a reinforcing cage, and end plates 40. The reinforcing cage is installed inside the precast pile body 4, and the end plates 40 are installed at both ends of the precast pile body 4 and connected to both ends of the main reinforcing bars 41 of the reinforcing cage. One end plate 40 is provided with a main reinforcing bar connection hole and a positioning rod connection hole 42, and the other end plate 40 is provided with a main reinforcing bar connection hole and a spring snap nut connection hole 43. The main reinforcing bar connection hole is used to connect with the main reinforcing bars of the reinforcing cage. In this embodiment, the positioning rod seat 30 is threadedly connected to the positioning rod connection hole 42, and the spring snap nut 1 is threadedly connected to the spring snap nut connection hole 43. The spring snap nut 1 is provided with a triangular snap spring 2. When two adjacent precast concrete piles are connected, the end of the precast concrete pile with the positioning rod can be snapped with the end of the adjacent precast concrete pile with the spring snap nut through the positioning rod, the spring snap nut, and the triangular snap spring, thereby realizing the connection of the two adjacent precast concrete piles.

[0061] like Figure 8 As shown, another embodiment of the precast pile connection structure disclosed in this utility model includes: a precast pile body 4, a first nut sleeve 50, a second nut sleeve 51, and the triangular spring mechanical joint described in this application.

[0062] The first nut sleeve 50 and the second nut sleeve 51 are respectively installed at both ends of the main reinforcement 41 of the precast pile body 4. The positioning rod 3 is installed in the first nut sleeve 50, and the spring snap nut 1 is installed in the second nut sleeve 51. The triangular snap spring 2 is placed in the snap spring receiving groove 13 of the spring snap nut 1.

[0063] The adjacent precast piles are secured together by the positioning rod 3, the triangular snap-fit ​​spring 2, and the spring snap-fit ​​nut 1.

[0064] Specifically, the precast pile with nut sleeves includes a precast pile body 4, a reinforcing cage, and structures such as a first nut sleeve 50 and a second nut sleeve 51. The reinforcing cage is set inside the precast pile body 4, and the first nut sleeve 50 and the second nut sleeve 51 are respectively installed at both ends of the main reinforcing bars 41 of the reinforcing cage. The positioning rod seat 30 of the positioning rod 3 is threadedly connected to the first nut sleeve 50. A spring-loaded nut 1 is installed in the second nut sleeve 51, and a triangular spring 2 is placed in the spring-loaded spring receiving groove 13 of the spring-loaded nut 1. When two adjacent precast concrete piles are connected, the end of the precast concrete pile with the positioning rod can be connected to the end of the adjacent precast concrete pile with the spring-loaded nut through the positioning rod, the spring-loaded nut, and the triangular spring, thereby realizing the connection of the two adjacent precast concrete piles.

[0065] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A spring clamp nut characterized by: The spring clamping nut body (10) is provided with external threads (12) on the outer side wall for connecting with the end plate / nut sleeve of the precast pile, and is internally provided with a clamping spring accommodating groove (13) for accommodating the triangular clamping spring (2), wherein the clamping spring accommodating groove (13) is a spiral groove. The spring clamping nut body (10) is further provided with a plug mounting groove (14) at one end away from the insertion end of the positioning insertion rod (3), and the plug (11) is mounted in the plug mounting groove (14). The spiral starting end of the clamping spring accommodating groove (13) starts at the plug mounting groove (14), and the spiral ending end of the clamping spring accommodating groove (13) ends inside the end face of one end of the insertion end of the positioning insertion rod (3), so that the spring clamping nut body (10) is close to the insertion end of the positioning insertion rod (3) to form a stop portion (19) for axially stopping the triangular clamping spring. The plug (11) is threadedly connected with the spring clamping nut body (10).

2. The spring collet nut of claim 1, wherein: The plug (11) is further provided with a glue injection hole (15).

3. The spring collet nut of claim 2, wherein: The spring clamping nut body (10) is internally provided with a sawtooth thread structure, the groove of the sawtooth thread structure is the clamping spring accommodating groove (13), and the non-working edge of the sawtooth thread structure is a clamping face (16).

4. Spring clamp nut according to any one of claims 1 to 3, characterized in that: The included angle between the non-working edge and the working edge of the sawtooth thread structure is 60°.

5. The spring collet nut of claim 4, wherein: The tooth pitch of the sawtooth thread structure is 5mm-6mm.

6. The spring collet nut of claim 5, wherein: The spring clamping nut body (10) is further provided with a spring clamping nut tightening structure (17) and / or a guide face (18) at one end close to the insertion of the positioning insertion rod (3).

7. The spring castellated nut of claim 6, wherein: It comprises:

8. A triangular spring mechanical joint characterized by, a positioning insertion rod (3), a triangular clamping spring (2), and a spring clamping nut (1) according to any one of claims 1 to 7; the triangular clamping spring (2) is placed in the clamping spring accommodating groove (13) of the spring clamping nut (1); the positioning insertion rod (3) can be inserted into the spring clamping nut (1) and clamped with the spring clamping nut (1) through the triangular clamping spring (2). It comprises:

9. A precast pile connection structure, characterized by a precast pile body (4), end plates (40) arranged at both ends of the precast pile body (4), and a triangular spring mechanical joint according to claim 8; the end plate (40) at one end is provided with the positioning insertion rod (3), and the end plate (40) at the other end is provided with the spring clamping nut (1), and the triangular clamping spring (2) is placed in the clamping spring accommodating groove (13) of the spring clamping nut (1); two adjacent precast piles are connected through the positioning insertion rod (3), the triangular clamping spring (2), and the spring clamping nut (1). It comprises:

10. A precast pile connection structure, characterized by, a precast pile body (4), a first nut sleeve (50), a second nut sleeve (51), and a triangular spring mechanical joint according to claim 8. ​ The first nut sleeve (50) and the second nut sleeve (51) are respectively installed at both ends of the main reinforcement (41) of the precast pile body (4), the positioning inserting rod (3) is installed in the first nut sleeve (50), the spring clamping nut (1) is installed in the second nut sleeve (51), and the triangular clamping spring (2) is arranged in the clamping spring accommodating groove (13) of the spring clamping nut (1); Two adjacent sections of the precast pile are connected through the positioning inserting rod (3), the triangular clamping spring (2) and the spring clamping nut (1).

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