Positioning inserting rod and mechanical connector

Abstract

The positioning insertion rod comprises a positioning insertion rod seat and an insertion head, and further comprises a twisting part which is arranged between the positioning insertion rod seat and the insertion head and used for twisting the positioning insertion rod, a plurality of twisting clamping faces are arranged on the outer wall of the twisting part, and the twisting clamping faces are arranged on the outer wall of the twisting part. And the distance between the two twisting clamping surfaces which are oppositely arranged is greater than or equal to the outer diameter of the plug. According to the positioning insertion rod disclosed by the utility model, the twisting part is arranged between the positioning insertion rod seat and the insertion head, and the twisting part is provided with the twisting clamping surface of which the relative distance is greater than the outer diameter of the insertion head, so that enough acting force can be conveniently applied to the positioning insertion rod, and the effective connection between the positioning insertion rod and a precast pile end plate or a nut sleeve is ensured; therefore, the connection performance of the mechanical joint is improved.

Description

Technical Field

[0001] This utility model relates to the field of pre-installed pile connection technology, and in particular to a positioning rod and mechanical connector. 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 1, a spring-loaded snap-fit ​​nut 2, and a triangular snap-fit ​​spring 3. The plug of the positioning rod 1 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, the mechanical joint also has the following problems: the plug end of the positioning rod 1 in the mechanical joint is provided with an internal hexagonal hole structure 16 for connecting the positioning rod to the end plate or nut sleeve of the precast pile. However, when the positioning rod is connected to the end plate or nut sleeve of the precast pile through this structure, the internal hexagonal structure is not strong enough to apply force, which can easily cause damage to the internal hexagonal hole or stripping of the positioning rod, thus affecting the connection performance of the mechanical joint. Utility Model Content

[0004] This utility model proposes a positioning rod to address the above-mentioned problems.

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

[0006] A positioning rod includes a positioning rod seat and a plug, and further includes a turning part disposed between the positioning rod seat and the plug for turning the positioning rod. The outer wall of the turning part is provided with a plurality of turning clamping surfaces, and the distance between two oppositely disposed turning clamping surfaces is greater than or equal to the outer diameter of the plug.

[0007] Furthermore, the distance between the two opposing rotating clamping surfaces is less than or equal to the outer diameter of the positioning insert seat.

[0008] Furthermore, the rotating part has a regular polygonal prism structure.

[0009] Furthermore, an arc-shaped transition surface is provided between two adjacent faces of the regular polygonal prism.

[0010] Furthermore, the plug is provided with a spiral tooth structure that can engage with the triangular snap-fit ​​spring.

[0011] Furthermore, the spiral tooth structure is a sawtooth thread structure, and the angle between the non-working surface and the working surface of the sawtooth thread structure is 60°.

[0012] Furthermore, the spiral tooth structure is a double-line spiral tooth structure, and the pitch of the triangular snap-fit ​​spring is twice the tooth pitch of the spiral tooth structure.

[0013] Furthermore, the pitch of the spiral tooth structure is 2.5mm-3mm.

[0014] A mechanical connector includes a spring-loaded snap-fit ​​nut, a triangular snap-fit ​​spring, and the positioning rod described in this application;

[0015] The spring-loaded nut has a spring-loaded receiving groove, and the triangular spring-loaded spring is placed in the spring-loaded receiving groove. The plug of the positioning rod can be inserted into the body of the spring-loaded nut, so that the positioning rod and the spring-loaded nut are securely connected by the triangular spring-loaded spring.

[0016] A mechanical joint includes a first nut sleeve, a second nut sleeve, a spring-loaded nut, a triangular spring, and the positioning rod described in this application;

[0017] One end of the first nut sleeve is the first main rib connection part, and the other end is the positioning insert rod connection part;

[0018] One end of the second nut sleeve is the second main rib connection part, and the other end is the spring-loaded nut connection part;

[0019] The first nut sleeve is connected to the positioning rod, and the second nut sleeve is connected to the spring-loaded nut;

[0020] The spring-loaded nut has a spring-loaded receiving groove, and the triangular spring-loaded spring is placed in the spring-loaded receiving groove. The plug of the positioning rod can be inserted into the body of the spring-loaded nut, so that the positioning rod and the spring-loaded nut are securely connected by the triangular spring-loaded spring.

[0021] Furthermore, the spring snap nut includes a spring snap nut body and a plug, and the spring snap nut body is provided with a spiral snap spring receiving groove for accommodating the triangular snap spring;

[0022] 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;

[0023] 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.

[0024] Furthermore, the outer walls of the first nut sleeve and the second nut sleeve are provided with anti-rotation structures. The first nut sleeve has a first annular portion with the same diameter as the outer wall of the first nut sleeve at one end near the positioning rod connection part, and the second nut sleeve has a second annular portion with the same diameter as the outer wall of the second nut sleeve at one end near the spring snap nut connection part.

[0025] Compared with the prior art, the positioning rod disclosed in this utility model has the following beneficial effects: In this application, since a turning part is provided between the positioning rod seat and the plug, and the turning part is provided with a turning clamping surface with a relative distance greater than the outer diameter of the plug, it is convenient to apply sufficient force to the positioning rod to ensure the effective connection between the positioning rod and the precast pile end plate or nut sleeve, thereby improving the connection performance of the mechanical joint. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the positioning rod disclosed in this utility model;

[0027] Figure 2 This is a structural diagram of a first embodiment of a mechanical joint having the positioning rod disclosed in this utility model, specifically a mechanical joint for anchoring triangular springs on an end plate.

[0028] Figure 3 This is a structural diagram of the spring-loaded snap nut in the mechanical joint disclosed in this utility model;

[0029] Figure 4 This is a structural diagram of the spring-loaded snap-fit ​​nut body in the mechanical joint disclosed in this utility model;

[0030] Figure 5 This is a structural diagram of the triangular snap-fit ​​spring in the mechanical joint disclosed in this utility model;

[0031] Figure 6 This is a structural diagram of a second embodiment of a mechanical joint having the positioning insert disclosed in this utility model, specifically a mechanical joint for anchoring a triangular spring with a nut sleeve;

[0032] Figure 7 This is a structural diagram of the first (second) nut sleeve in the mechanical joint disclosed in this utility model;

[0033] Figure 8 for Figure 7 A sectional view;

[0034] Figure 9 This is a mechanical structure diagram of a prior patent.

[0035] In the diagram: 1. Positioning rod; 10. Positioning rod seat; 11. Plug; 12. Tightening part; 13. Tightening clamping surface; 14. Arc-shaped transition surface; 15. Spiral tooth structure; 16. Internal hexagonal hole structure; 2. Spring snap-fit ​​nut; 20. Spring snap-fit ​​nut body; 21. Plug; 22. Snap-fit ​​spring receiving groove; 23. Plug mounting groove; 24. Stop part; 3. Triangular snap-fit ​​spring; 4. First nut sleeve; 40. First main rib connecting part; 41. Positioning rod connecting part; 42. First annular part; 5. Second nut sleeve; 50. Second main rib connecting part; 51. Spring snap-fit ​​nut connecting part; 52. Second annular part. Detailed Implementation

[0036] Example 1

[0037] like Figure 1 As shown, the positioning rod 1 disclosed in this utility model includes a positioning rod seat 10 and a plug 11, and also includes a screwing part 12 disposed between the positioning rod seat 10 and the plug 11 for screwing the positioning rod 1. The outer wall of the screwing part 12 is provided with a plurality of screwing clamping surfaces 13, and the distance between two oppositely disposed screwing clamping surfaces 13 is greater than or equal to the outer diameter of the plug 11.

[0038] Specifically, in this embodiment, the positioning rod seat 10 is provided with an external thread for connection with the end plate or nut sleeve of the precast pile, and the plug 11 is provided with a spiral tooth structure 15 that can engage with the triangular snap-fit ​​spring 3. A screwing part 12 is provided between the plug 11 and the positioning rod seat 10. The screwing part 12 is provided with multiple screwing clamping surfaces 13. The multiple screwing clamping surfaces 13 form multiple sets of oppositely arranged clamping surface groups. The distance between two oppositely arranged screwing clamping surfaces 13 is greater than or equal to the outer diameter of the plug. That is, in this embodiment, by setting the screwing structure between the plug 11 and the positioning rod seat 10, the clamping area and torque of the positioning rod 1 can be effectively increased, thereby making it convenient and effective to screw the positioning rod 1 to the end plate or nut sleeve of the precast pile. This avoids the problem of damage to the internal hexagonal hole or stripping of the positioning rod when using the internal hexagonal hole for screwing due to insufficient force.

[0039] Furthermore, the distance between the two opposing rotating clamping surfaces 13 is less than or equal to the outer diameter of the positioning insert seat 10.

[0040] Specifically, in this embodiment, the rotating part 12 of the positioning rod 1 is machined with multiple sets of oppositely arranged rotating clamping surfaces 13, so that when the positioning rod 1 is rotated to different angles, it can be easily operated with tools such as wrenches. At the same time, the distance between the two oppositely arranged rotating clamping surfaces 13 is less than or equal to the outer diameter of the positioning rod seat 10, which will not affect the normal connection function of the positioning rod 1, and at the same time can increase the torque on the positioning rod 1, so as to make it easier to rotate.

[0041] Furthermore, the rotating part 12 has a regular polygonal prism structure.

[0042] Specifically, in this embodiment, the screwing part 12 can adopt a regular polyhedral structure, such as a regular square prism, regular hexagonal prism, regular octagonal prism, or regular decagonal prism. Each face of the prism is a screwing clamping surface, which facilitates clamping and screwing of the positioning rod using tools such as wrenches, so that the positioning rod is connected to the precast pile end plate or nut sleeve. The screwing part 12 can also be a plane machined on a cylindrical surface, so that the plane and the arc surface (part of the cylindrical surface) are alternately arranged.

[0043] Furthermore, an arc-shaped transition surface 14 is provided between two adjacent faces of the regular polygonal prism.

[0044] Specifically, in this embodiment, an arc-shaped transition surface 14 is provided between two adjacent faces of the regular polyprism. That is, the intersecting edges of two adjacent faces of the regular polyprism are rounded to form an arc-shaped transition surface 14. By setting the arc-shaped transition surface, not only is the existence of sharp corner edges avoided, but it also facilitates the insertion of tools such as wrenches (the arc-shaped transition surfaces on both sides play a guiding role, making it easy to insert the wrench opening), so as to realize the turning of the positioning rod 1.

[0045] Furthermore, the plug 11 is provided with a spiral locking tooth structure 15 that can engage with the triangular locking spring 3.

[0046] Specifically, in this embodiment, the positioning rod seat 10 is provided with a cylindrical plug 11, and the outer wall of the plug 11 is machined with a spiral tooth structure 15. The spiral tooth structure 15 can be engaged with the triangular snap-fit ​​spring 3, that is, the triangular snap-fit ​​spring 3 can be clamped on the plug 11, thereby enabling the positioning rod 1 and the spring snap-fit ​​nut 2 to be locked together through the triangular snap-fit ​​spring 3.

[0047] Furthermore, the spiral tooth structure 15 is a sawtooth thread structure, and the angle between the non-working surface and the working surface of the sawtooth thread structure is 60°.

[0048] Specifically, in this embodiment, the spiral tooth structure 15 is a sawtooth thread structure. The angle between the non-working surface and the working surface of the sawtooth thread structure is 60°, which makes the positioning rod 1, the triangular snap-fit ​​spring 3 and the spring snap-fit ​​nut 2 have better force performance, thereby improving the pull-out strength.

[0049] Furthermore, the spiral tooth structure is a double-line spiral tooth structure, and the pitch of the triangular snap-fit ​​spring is twice the tooth pitch of the spiral tooth structure.

[0050] Specifically, in this embodiment, the spiral tooth structure 15 on the plug 11 is a double-line spiral tooth structure, and the pitch of the triangular snap-fit ​​spring 3 is twice the tooth pitch of the spiral tooth structure 15. Correspondingly, the snap-fit ​​spring receiving groove 22 is a single-line spiral groove. The groove pitch of the snap-fit ​​spring receiving groove, the pitch of the spiral tooth, and the pitch of the triangular snap-fit ​​spring are the same. The groove height of the snap-fit ​​spring receiving groove is twice the cross-sectional height of the triangular snap-fit ​​spring, the groove width of the snap-fit ​​spring receiving groove is the same as the cross-sectional width of the triangular snap-fit ​​spring, the height of the spiral tooth is the same as the cross-sectional height of the triangular snap-fit ​​spring, and the width of the spiral tooth is half the cross-sectional width of the triangular snap-fit ​​spring. This ensures that after the plug is inserted into any position of the spring snap-fit ​​nut, the triangular snap-fit ​​spring can be clamped in the spiral tooth, thereby ensuring that the positioning plug and the spring snap-fit ​​nut can be effectively engaged. Meanwhile, since the width of the spiral locking teeth is half the width of the triangular locking spring cross-section, when the plug, triangular locking spring, and spring locking nut are subjected to pull-out force, the force is located at the center of the triangular locking spring cross-section, thereby improving the force performance of the triangular locking spring, increasing the strength of the triangular locking spring, and improving the pull-out resistance of the pile connection.

[0051] Furthermore, the pitch of the spiral tooth structure 15 is 2.5mm-3mm.

[0052] Specifically, in this embodiment, the tooth pitch H1 of the spiral tooth structure 15 is 2.5mm-3mm. After testing, the strength of the tooth corresponding to this tooth pitch, the spring receiving groove corresponding to the groove pitch, and the triangular spring corresponding to the screw pitch after clamping is greater than or equal to the requirements of the relevant standards for the connection strength of precast piles. In this embodiment, since the spiral tooth structure is a double-line spiral tooth structure, its screw pitch is 5mm-6mm.

[0053] Example 2

[0054] like Figure 2 As shown, the structural diagram of the first embodiment of the mechanical connector disclosed in this utility model includes a spring-loaded snap-fit ​​nut 2, a triangular snap-fit ​​spring 3, and the positioning plug 1 described in this application;

[0055] The spring snap nut 2 is provided with a snap spring receiving groove 22, and the triangular snap spring 3 is placed in the snap spring receiving groove 22. The plug 11 of the positioning rod 1 can be inserted into the spring snap nut 20, so that the positioning rod 1 and the spring snap nut 2 are securely connected by the triangular snap spring 3.

[0056] Specifically, in this embodiment, the outer wall of the spring-loaded nut 2 is provided with an external thread for connection with the precast pile end plate, and the spring-loaded nut 2 is provided with a spring-loaded receiving groove 22 for accommodating the triangular spring-loaded nut 3. The positioning rod 1 includes a positioning rod seat 10 and a plug 11 disposed on the positioning rod seat 10. The plug 11 is provided with a spiral tooth structure 15, and the spiral tooth structure 15 is provided with a snap-fit ​​surface. Figure 5 As shown, the triangular snap-fit ​​spring 3 is preferably a helical spring with an equilateral triangular cross-section. The snap-fit ​​spring receiving groove 22 in the spring snap-fit ​​nut 2 is a helical groove. In this embodiment, the helical snap-fit ​​tooth structure 15 on the plug 11 is a double-helical sawtooth thread structure, and the snap-fit ​​spring receiving groove 22 is a groove with a sawtooth thread structure. When the plug 11 is inserted into the spring snap-fit ​​nut 2, the triangular snap-fit ​​spring 3 can open radially in the snap-fit ​​spring receiving groove 22 and clamp in the helical snap-fit ​​tooth structure 15. The snap-fit ​​surface on the helical snap-fit ​​tooth structure 15, the snap-fit ​​surface in the snap-fit ​​spring receiving groove 22, and the triangular snap-fit ​​spring 3 achieve the snap-fit ​​between the positioning plug 1 and the spring snap-fit ​​nut 2. The cross-sectional structure of the positioning plug 1, the triangular snap-fit ​​spring 3, and the snap-fit ​​spring receiving groove 22 in the spring snap-fit ​​nut 2 in this embodiment is the same as or similar to that of the prior patent application 202422406996.8, and the snap-fit ​​principle of the mechanical connector is also the same, which will not be described in detail here.

[0057] Furthermore, such as Figure 3 and Figure 4 As shown, the spring snap nut 2 includes a spring snap nut body 20 and a plug 21. The spring snap nut body 20 is provided with a spiral snap spring receiving groove 22 for accommodating the triangular snap spring 3.

[0058] The spring snap nut body 20 is further provided with a plug mounting groove 23 at one end away from the insertion end of the positioning rod 1, and the plug 21 is installed in the plug mounting groove 23;

[0059] The spiral starting end of the snap-fit ​​spring receiving groove 22 begins at the plug mounting groove 23, and the spiral ending end of the snap-fit ​​spring receiving groove 22 ends at the inner side of the end face of the insertion end of the positioning rod 1, so that the spring snap-fit ​​nut body 20 forms a stop part 24 for axially stopping the triangular snap-fit ​​spring 3 near the insertion end of the positioning rod 1.

[0060] Specifically, the spring-loaded snap-fit ​​nut body 20 is a sleeve structure. External threads are machined on the outer wall of the spring-loaded snap-fit ​​nut body 20, and a spiral groove is machined inside the spring-loaded snap-fit ​​nut body 20. This spiral groove serves as a snap-fit ​​spring receiving groove 22 for accommodating the triangular snap-fit ​​spring 3. A plug mounting groove 23 is provided at the end of the spring-loaded snap-fit ​​nut body 20 away from the insertion point of the positioning rod 1. A plug 21 is installed in the plug mounting groove 23. The plug 21 can be a structure such as an elastic retaining ring, thus the plug 21 snaps into the plug mounting groove 23 to achieve the snap-fit ​​of the triangular snap-fit ​​spring 3. The position of the snap-fit ​​spring 3 is restricted. Preferably, the outer wall of the plug 21 is threaded, and the inner wall of the plug mounting groove 23 is also threaded. The plug 21 is threadedly installed in the plug mounting groove 23. The threaded connection structure facilitates installation. The snap-fit ​​spring receiving groove 22 with a spiral groove structure starts from the plug mounting groove 23 and ends at the inner side of the end face of the insertion end of the positioning rod 1. That is, the end of the snap-fit ​​spring receiving groove 22 is still a certain distance away from the end face of the insertion end of the positioning rod 1, so that the spring snap-fit ​​nut body 20 is close to the end face of the insertion end of the positioning rod 1. The insertion end of the positioning rod 1 forms a stop portion 24 for axially stopping the triangular snap-fit ​​spring 3. The specific length of the stop portion 24 is set according to actual processing requirements, and can generally be set to 1-5mm. The triangular snap-fit ​​spring 3 is inserted into the snap-fit ​​spring receiving groove 22 by the end with the plug mounting groove 23, and then the plug 21 is installed to restrict it in the snap-fit ​​spring receiving groove 22. In this application, the snap-fit ​​spring receiving groove 22 with the spiral groove structure in the spring snap-fit ​​nut 2 starts from the plug at the end away from the insertion end of the positioning rod 1. The spring-loaded nut 2 is located at the receiving groove 22 and terminates inside one end of the insertion end of the positioning rod 1, so that the spring-loaded nut 2 near the insertion end of the positioning rod 1 forms a stop part 24 for axially stopping the triangular snap-fit ​​spring 3. At the same time, a plug 21 is also provided, so that both ends of the triangular snap-fit ​​spring 3 are stopped. This ensures that even when the positioning rod 1 is subjected to axial force, the positioning rod 1 and the triangular snap-fit ​​spring 3 can still be effectively restricted in the snap-fit ​​spring receiving groove 22 in the spring-loaded nut 2, thereby improving the connection performance of the mechanical joint.

[0061] Example 3

[0062] like Figure 6 The diagram shown is a structural diagram of a second embodiment of the mechanical connector disclosed in this utility model, including a first nut sleeve 4, a second nut sleeve 5, a spring-loaded nut 2, a triangular spring 3, and the positioning rod 1 described in this application;

[0063] The first nut sleeve 4 has a first main rib connecting part 40 at one end and a positioning insert rod connecting part 41 at the other end; the second nut sleeve 5 has a second main rib connecting part 50 at one end and a spring snap nut connecting part 51 at the other end.

[0064] The first nut sleeve 4 is connected to the positioning rod 1, and the second nut sleeve 5 is connected to the spring-loaded nut 2;

[0065] The spring snap nut 2 is provided with a snap spring receiving groove 22, and the triangular snap spring 3 is placed in the snap spring receiving groove 22. The plug 11 of the positioning rod 1 can be inserted into the spring snap nut body 20, so that the positioning rod 1 and the spring snap nut 2 are securely connected by the triangular snap spring 3.

[0066] Specifically, in this embodiment, one end of the first nut sleeve 4 is the first main rib connecting part 40, and the other end is the positioning insert connecting part 41; one end of the second nut sleeve 5 is the second main rib connecting part 50, and the other end is the spring snap-fit ​​nut connecting part 51; the outer wall of the spring snap-fit ​​nut 2 is provided with external threads for connecting with the nut sleeve, the spring snap-fit ​​nut 2 is installed in the second nut sleeve 5, and the spring snap-fit ​​nut 2 is provided with a snap-fit ​​spring receiving groove 22 for accommodating the triangular snap-fit ​​spring 3. The positioning insert 1 includes a positioning insert seat 10 and a plug 11 provided on the positioning insert seat 10. The positioning insert seat 10 is provided with external threads and is connected to the first nut sleeve 4. The plug 11 is provided with a spiral tooth structure 1. 5. The spiral tooth structure 15 has a snap-fit ​​surface; the triangular snap-fit ​​spring 3 is a spiral spring with an equilateral triangular cross-section, and the snap-fit ​​spring receiving groove 22 in the spring snap-fit ​​nut 2 is a spiral groove. In this embodiment, the spiral tooth structure 15 on the plug 11 is a double-helix sawtooth thread structure, and the snap-fit ​​spring receiving groove 22 is a groove with a sawtooth thread structure. When the plug 11 is inserted into the spring snap-fit ​​nut 2, the triangular snap-fit ​​spring 3 can open radially in the snap-fit ​​spring receiving groove 22 and clamp in the spiral tooth structure 15. The snap-fit ​​surface on the spiral tooth structure 15, the snap-fit ​​surface in the snap-fit ​​spring receiving groove 22, and the triangular snap-fit ​​spring 3 achieve the snap-fit ​​between the positioning plug 1 and the spring snap-fit ​​nut 2. The cross-sectional structure of the positioning plug, 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, and the snap-fit ​​principle of the mechanical connector is also the same, which will not be described in detail here.

[0067] Furthermore, the spring snap nut 2 includes a spring snap nut body 20 and a plug 21. The spring snap nut body 20 is provided with a spiral snap spring receiving groove 22 for accommodating the triangular snap spring 3.

[0068] The spring snap nut body 20 is further provided with a plug mounting groove 23 at one end away from the insertion end of the positioning rod 1, and the plug 21 is installed in the plug mounting groove 23;

[0069] The spiral starting end of the snap-fit ​​spring receiving groove 22 begins at the plug mounting groove 23, and the spiral ending end of the snap-fit ​​spring receiving groove 22 ends at the inner side of the end face of the insertion end of the positioning rod 1, so that the spring snap-fit ​​nut body 20 forms a stop part 24 for axially stopping the triangular snap-fit ​​spring 3 near the insertion end of the positioning rod 1.

[0070] Specifically, the spring-loaded snap-fit ​​nut body 20 is a sleeve structure. External threads are machined on the outer wall of the spring-loaded snap-fit ​​nut body 20, and a spiral groove is machined inside the spring-loaded snap-fit ​​nut body 20. This spiral groove serves as a snap-fit ​​spring receiving groove 22 for accommodating the triangular snap-fit ​​spring 3. A plug mounting groove 23 is provided at the end of the spring-loaded snap-fit ​​nut body 20 away from the insertion point of the positioning rod 1. A plug 21 is installed in the plug mounting groove 23. The plug 21 can be a structure such as an elastic retaining ring, thus the plug 21 snaps into the plug mounting groove 23 to achieve the snap-fit ​​of the triangular snap-fit ​​spring 3. The position of the snap-fit ​​spring 3 is restricted. Preferably, the outer wall of the plug 21 is threaded, and the inner wall of the plug mounting groove 23 is also threaded. The plug 21 is threadedly installed in the plug mounting groove 23. The threaded connection structure facilitates installation. The snap-fit ​​spring receiving groove 22 with a spiral groove structure starts from the plug mounting groove 23 and ends at the inner side of the end face of the insertion end of the positioning rod 1. That is, the end of the snap-fit ​​spring receiving groove 22 is still a certain distance away from the end face of the insertion end of the positioning rod 1, so that the spring snap-fit ​​nut body 20 is close to the end face of the insertion end of the positioning rod 1. The insertion end of the positioning rod 1 forms a stop portion 24 for axially stopping the triangular snap-fit ​​spring 3. The specific length of the stop portion 24 is set according to actual processing requirements, and can generally be set to 1-5mm. The triangular snap-fit ​​spring 3 is inserted into the snap-fit ​​spring receiving groove 22 by the end with the plug mounting groove 23, and then the plug 21 is installed to restrict it in the snap-fit ​​spring receiving groove 22. In this application, the snap-fit ​​spring receiving groove 22 with the spiral groove structure in the spring snap-fit ​​nut 2 starts from the plug at the end away from the insertion end of the positioning rod 1. The spring-loaded nut 2 is located at the receiving groove 22 and terminates inside one end of the insertion end of the positioning rod 1, so that the spring-loaded nut 2 near the insertion end of the positioning rod 1 forms a stop part 24 for axially stopping the triangular snap-fit ​​spring 3. At the same time, a plug 21 is also provided, so that both ends of the triangular snap-fit ​​spring 3 are stopped. This ensures that even when the positioning rod 1 is subjected to axial force, the positioning rod 1 and the triangular snap-fit ​​spring 3 can still be effectively restricted in the snap-fit ​​spring receiving groove 22 in the spring-loaded nut 2, thereby improving the connection performance of the mechanical joint.

[0071] Furthermore, such as Figure 7 and Figure 8As shown, the first nut sleeve 4 and the second nut sleeve 5 are provided with anti-rotation structures on their outer walls. The first nut sleeve 4 is provided with a first annular portion 42 with the same diameter as the outer wall of the first nut sleeve 4 at one end near the positioning rod connecting part 41. The second nut sleeve 5 is provided with a second annular portion 52 with the same diameter as the outer wall of the second nut sleeve 5 at one end near the spring snap nut connecting part 51.

[0072] Specifically, in this embodiment, the outer walls of the first nut sleeve 4 and the second nut sleeve 5 are provided with anti-rotation structures. The anti-rotation structure can be a non-circular anti-rotation surface provided on the outer wall of the nut sleeve, such as a plane, arc surface, V-shaped surface, or groove surface. The non-circular anti-rotation surface can include at least one straight surface, which is parallel to the central axis of the nut sleeve or gradually moves away from or closer to the central axis of the nut sleeve. It can also be a groove structure, that is, the outer wall of the nut sleeve can be a polygonal prism structure, or multiple planes, arc surfaces, V-shaped surfaces, or groove surfaces machined circumferentially on a cylinder. The anti-rotation surface is formed along the axial direction of the nut sleeve. By providing anti-rotation structures, the axial rotation of the nut sleeve and the concrete structure can be restricted, reducing the probability of the nut sleeve rotating and improving the connection tightness. Meanwhile, an annular portion is provided at the end of the nut sleeve away from the main reinforcement connection. This can prevent the end of the nut sleeve from cutting the end face of the tensioning plate and damaging the end face of the tensioning plate during the tensioning process of using the nut sleeve to tension the main reinforcement.

[0073] 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 positioning insert, comprising a positioning insert base and a plug, characterized in that: It also includes a screwing part disposed between the positioning rod seat and the plug for screwing the positioning rod. The outer wall of the screwing part is provided with a plurality of screwing clamping surfaces, and the distance between two oppositely disposed screwing clamping surfaces is greater than or equal to the outer diameter of the plug.

2. The positioning rod according to claim 1, characterized in that: The distance between the two oppositely positioned rotating clamping surfaces is less than or equal to the outer diameter of the positioning insert seat.

3. The positioning rod according to claim 2, characterized in that: The rotating part has a regular polygonal prism structure.

4. The positioning rod according to claim 3, characterized in that: The regular polygonal prism has an arc-shaped transition surface between two adjacent faces.

5. The positioning rod according to any one of claims 1 to 4, characterized in that: The plug is equipped with a spiral locking tooth structure that can engage with the triangular locking spring.

6. The positioning rod according to claim 5, characterized in that: The spiral tooth structure is a sawtooth thread structure, and the angle between the non-working surface and the working surface of the sawtooth thread structure is 60°.

7. The positioning rod according to claim 6, characterized in that: The spiral tooth structure is a double-line spiral tooth structure, and the pitch of the triangular snap-fit ​​spring is twice the pitch of the spiral tooth structure.

8. The positioning rod according to claim 7, characterized in that: The pitch of the spiral tooth structure is 2.5mm-3mm.

9. A mechanical joint, characterized in that: Includes a spring-loaded nut, a triangular spring, and the positioning rod as described in any one of claims 1-8; The spring-loaded nut has a spring-loaded receiving groove, and the triangular spring-loaded spring is placed in the spring-loaded receiving groove. The plug of the positioning rod can be inserted into the body of the spring-loaded nut, so that the positioning rod and the spring-loaded nut are securely connected by the triangular spring-loaded spring.

10. A mechanical joint, characterized in that: It includes a first nut sleeve, a second nut sleeve, a spring-loaded nut, a triangular spring, and a positioning rod as described in any one of claims 1-8; One end of the first nut sleeve is the first main rib connection part, and the other end is the positioning insert rod connection part; One end of the second nut sleeve is the second main rib connection part, and the other end is the spring-loaded nut connection part; The first nut sleeve is connected to the positioning rod, and the second nut sleeve is connected to the spring-loaded nut; The spring-loaded nut has a spring-loaded receiving groove, and the triangular spring-loaded spring is placed in the spring-loaded receiving groove. The plug of the positioning rod can be inserted into the body of the spring-loaded nut, so that the positioning rod and the spring-loaded nut are securely connected by the triangular spring-loaded spring.

11. The mechanical joint according to claim 9 or 10, characterized in that: The spring snap nut includes a spring snap nut body and a plug. The spring snap nut body is provided with a spiral snap spring receiving groove for accommodating the triangular snap spring. 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; 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.

12. The mechanical joint according to claim 10, characterized in that: The outer walls of the first nut sleeve and the second nut sleeve are provided with anti-rotation structures. The first nut sleeve has a first annular portion with the same diameter as the outer wall of the first nut sleeve at one end near the positioning rod connection part, and the second nut sleeve has a second annular portion with the same diameter as the outer wall of the second nut sleeve at one end near the spring snap nut connection part.

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