Spring-clamped mechanical joint and precast pile connecting structure

Abstract

The utility model discloses a mechanical connector clamped by a spring and a precast pile connecting structure. The mechanical connector clamped by the spring and the precast pile connecting structure comprise a first nut sleeve, a second nut sleeve, a spring clamping nut, a positioning insertion rod and a clamping spring, the positioning insertion rod comprises a positioning insertion rod seat and an insertion head, the insertion head is provided with first clamping teeth, and the first clamping teeth are provided with first clamping surfaces; the spring clamping nut is installed in the spring clamping nut connecting part, a clamping spring containing groove is formed in the spring clamping nut, and a second clamping face is arranged in the clamping spring containing groove. The clamping spring is arranged in the clamping spring accommodating groove; the plug can be inserted into the spring clamping nut and clamped with the clamping spring, and then clamping of the positioning insertion rod and the spring clamping nut is achieved through the first clamping face, the second clamping face and the clamping spring. According to the mechanical joint clamped by the spring, the quick connection between concrete piles can be realized, the connection is reliable, and the comprehensive cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated pile connection, in particular to a spring-clamped mechanical joint and a prefabricated pile connection structure. Background Art

[0002] In construction, the connection of prefabricated parts is an essential process. In order to achieve rapid connection of prefabricated parts, the existing technology generally uses mechanical joints to connect prefabricated parts. However, the existing mechanical joints have problems such as complex structure and high overall cost. Utility Model Content

[0003] In view of the above problems, the utility model proposes a spring-clamped mechanical joint.

[0004] The technical means adopted by this utility model are as follows:

[0005] A spring-clamped mechanical joint comprises: a first nut sleeve, a second nut sleeve, a spring-clamping nut, a positioning rod and a clamping spring;

[0006] One end of the first nut sleeve is provided with a first main reinforcement connecting portion for connecting to the main reinforcement, and the other end is provided with a positioning rod connecting portion for connecting to the positioning rod;

[0007] The positioning rod comprises a positioning rod seat and a plug provided on the positioning rod seat, the positioning rod is connected to the positioning rod connecting portion via the positioning rod seat, the plug is provided with a first latching tooth, and the first latching tooth is provided with a first latching surface;

[0008] One end of the second nut sleeve is provided with a second main rib connecting portion for connecting to the main rib, and the other end is provided with a spring clamping nut connecting portion for connecting to the spring clamping nut;

[0009] The spring clamping nut is installed in the spring clamping nut connecting portion, and a clamping spring receiving groove for receiving the clamping spring is provided in the spring clamping nut, and a second clamping surface is provided in the clamping spring receiving groove;

[0010] The clamping spring is arranged in the clamping spring accommodating groove; the plug can be inserted into the spring clamping nut. When the plug is inserted into the spring clamping nut, the clamping spring can be opened in the radial direction in the clamping spring accommodating groove and clamped in the first clamping tooth, and the clamping of the positioning rod and the spring clamping nut is achieved through the first clamping surface, the second clamping surface and the clamping spring.

[0011] Furthermore, the first latching teeth are one or more circles of annular latching teeth provided on the plug; the clamping spring accommodating grooves are one or more circles of annular grooves provided in the spring clamping nut; and the clamping spring is an annular clamping spring.

[0012] Furthermore, the first latching tooth is a spiral latching tooth provided on the plug; the clamping spring accommodating groove is a spiral groove provided in the spring clamping nut; and the clamping spring is a spiral clamping spring.

[0013] Furthermore, the cross section of the clamping spring is triangular, circular or polygonal.

[0014] Furthermore, when the cross section of the clamping spring is circular, after the clamping spring is clamped in the first clamping tooth, the outer diameter corresponding to the tooth top of the first clamping tooth is greater than or equal to the diameter corresponding to the center of the cross section of the clamping spring;

[0015] When the cross-section of the clamping spring is triangular, the ratio of the width of the first clamping tooth to the cross-sectional width of the clamping spring is less than or equal to 1 / 2, and the height of the first clamping tooth is consistent with the cross-sectional height of the clamping spring; the ratio of the height of the first clamping tooth to the slot height of the clamping spring accommodating slot is equal to 1 / 2.

[0016] Furthermore, the cross section of the clamping spring is an equilateral triangle.

[0017] Furthermore, when the cross-section of the clamping spring is an equilateral triangle, the ratio of the width of the spiral clamping tooth to the width of the cross-section of the spiral clamping spring is less than or equal to 1 / 2, and the height of the spiral clamping tooth is consistent with the height of the cross-section of the spiral clamping spring; the ratio of the height of the spiral clamping tooth to the height of the spiral groove is equal to 1 / 2.

[0018] Furthermore, the spiral tooth is a double-line spiral tooth structure, the spiral groove is a single-line spiral groove, the pitch of the spiral groove, the pitch of the spiral tooth and the pitch of the spiral clamping spring are consistent, the groove height of the spiral groove is twice the cross-sectional height of the spiral clamping spring, the groove width of the spiral groove is consistent with the cross-sectional width of the spiral spring, the height of the spiral tooth is consistent with the cross-sectional height of the spiral clamping spring, and the width of the spiral tooth is 1 / 2 of the cross-sectional width of the spiral clamping spring.

[0019] Furthermore, a first sawtooth thread structure is provided in the spring clamping nut, the groove of the first sawtooth thread structure is the clamping spring accommodating groove, and the non-working edge of the first sawtooth thread structure is the second clamping surface;

[0020] The plug is provided with a second sawtooth thread structure, the second sawtooth thread structure is a double-line sawtooth thread, and the working edge of the second sawtooth thread structure is the first clamping surface.

[0021] Furthermore, the included angle between the non-working edge and the working edge of the serrated thread is 60°.

[0022] Furthermore, the rotation direction of the spiral clamping teeth is opposite to the rotation direction of the spiral clamping spring of the clamp on the spiral clamping teeth.

[0023] Furthermore, the outer diameter D1 corresponding to the tooth top of the first latching tooth is consistent with the inner diameter D2 corresponding to the groove top of the latching spring accommodating groove.

[0024] Furthermore, the tooth top of the first latching tooth is reduced in diameter to form a tooth top surface; the groove top of the latching spring accommodating groove is expanded in diameter to form a groove top surface; the outer diameter D1 corresponding to the tooth top surface is smaller than the inner diameter D2 corresponding to the groove top surface.

[0025] Furthermore, the pitch of the spiral teeth is 2.5mm-3mm.

[0026] Furthermore, the inner diameter of the clamping spring is equal to or smaller than the diameter corresponding to the tooth root of the first clamping tooth.

[0027] Furthermore, a plug guide portion is provided at the end of the plug.

[0028] Furthermore, a cutter recess is provided in the spring clamping nut at one end away from the plug insertion end.

[0029] Furthermore, a spring clamping nut tightening structure is provided at one end of the spring clamping nut close to the plug insertion; and a positioning rod tightening structure is provided at the end of the plug.

[0030] A prefabricated pile connection structure, comprising: a prefabricated pile body and the mechanical joint disclosed in this application;

[0031] The two ends of the main reinforcement in the prefabricated pile body are respectively connected to the first nut sleeve and the second nut sleeve;

[0032] The first nut sleeve is connected to the positioning rod, the spring clamping nut is installed in the second nut sleeve, and the spring clamping nut is connected to the clamping spring; the two adjacent precast piles are clamped and connected by the first nut sleeve, the second nut sleeve, the spring clamping nut, the positioning rod and the clamping spring.

[0033] Compared with the prior art, the spring-clamped mechanical joint disclosed in the present invention has the following beneficial effects: the spring-clamped mechanical joint disclosed in the present invention has a structure that can realize rapid connection between concrete piles, has reliable connection, and has low overall cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural diagram of a spring-clamped mechanical joint disclosed in the present utility model;

[0035] Figure 2 This is a structural diagram of the positioning rod in the utility model;

[0036] Figure 3 This is a cross-sectional view of the positioning rod in the present utility model;

[0037] Figure 4 This is a structural diagram of the clamping spring receiving groove in the utility model;

[0038] Figure 5 This is a structural diagram of the spiral clamping spring in the present utility model;

[0039] Figure 6 It is a cross-sectional view of the spiral clamping spring in the present utility model;

[0040] Figure 7 This is a structural diagram of pile connection using the spring clamping mechanical structure disclosed in the utility model.

[0041] In the figure: 1. First nut sleeve; 10. First main reinforcement connection part; 11. Positioning rod connection part; 2. Second nut sleeve; 20. Second main reinforcement connection part; 21. Spring clamping nut connection part; 3. Spring clamping nut; 30. Clamping spring accommodating groove; 31. Second clamping surface; 32. Groove top surface; 33. Knife withdrawal groove; 34. Spring clamping nut tightening structure; 4. Positioning rod; 40. Positioning rod seat; 41. Plug; 42. First clamping tooth; 43. First clamping surface; 44. Tooth top surface; 45. Plug guide part; 46. Positioning rod tightening structure; 5. Clamping spring; 60. Precast pile body; 61. Main reinforcement. DETAILED DESCRIPTION

[0042] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 as well as Figure 6 As shown, the spring-clamped mechanical joint disclosed in the present invention comprises: a first nut sleeve 1, a second nut sleeve 2, a spring-clamping nut 3, a positioning rod 4 and a clamping spring 5;

[0043] One end of the first nut sleeve 1 is provided with a first main rib connecting portion 10 for connecting to the main rib 61, and the other end is provided with a positioning rod connecting portion 11 for connecting to the positioning rod 4;

[0044] The positioning rod 4 includes a positioning rod seat 40 and a plug 41 provided on the positioning rod seat 40. The positioning rod 4 is connected to the positioning rod connecting portion 11 through the positioning rod seat 40. The plug 41 is provided with a first latching tooth 42, and the first latching tooth 42 is provided with a first latching surface 43.

[0045] One end of the second nut sleeve 2 is provided with a second main rib connecting portion 20 for connecting to the main rib 61, and the other end is provided with a spring clamping nut connecting portion 21 for connecting to the spring clamping nut 3;

[0046] The spring clamping nut 3 is installed in the spring clamping nut connecting portion 21. The spring clamping nut 3 is provided with a clamping spring receiving groove 30 for receiving the clamping spring 5. The clamping spring receiving groove 30 is provided with a second clamping surface 31.

[0047] The clamping spring 5 is arranged in the clamping spring accommodating groove 30; the plug 41 can be inserted into the spring clamping nut 3. When the plug 41 is inserted into the spring clamping nut 3, the clamping spring 5 can be opened in the radial direction in the clamping spring accommodating groove 30 and clamped in the first clamping tooth 42, and the clamping of the positioning rod 4 and the spring clamping nut 3 is achieved through the first clamping surface 43, the second clamping surface 31 and the clamping spring 5.

[0048] Specifically, in this embodiment, one end of the first nut sleeve 1 is provided with a first main reinforcement connecting part 10 for connecting to the main reinforcement 61. The main reinforcement can be a PC steel bar, threaded steel or steel strand. Accordingly, the first main reinforcement connecting part 10 can be a pier head clamp, a threaded hole or a tapered hole and the like. The other end is provided with a positioning rod connecting part 11 for connecting to the positioning rod 4. The positioning rod connecting part 11 is provided with an internal thread for connecting to the positioning rod; the positioning rod 4 includes a cylindrical positioning rod seat 40 and a cylindrical plug 41 arranged on the positioning rod seat 40. The positioning rod seat 10 is provided with an external thread for threaded connection with the positioning rod connecting part 11. The positioning rod 4 is threadedly connected to the positioning rod connecting part 11 through the positioning rod seat 40. The plug 41 is provided with a first latching tooth 42, and the first latching tooth 42 is provided with a first latching surface 43; one end of the second nut sleeve 2 is provided with a second main reinforcement connecting part 20 for connecting to the main reinforcement 61. Accordingly, the second main reinforcement connecting part 20 can be a structure such as a pier head clamp, threaded hole or tapered hole for connecting to a PC steel rod, threaded steel or steel strand. A spring clamping nut connecting portion 21 for connecting to a spring clamping nut 3 is provided in the other end of the second nut sleeve 2, and an internal thread is provided in the spring clamping nut connecting portion 21; an external thread is provided on the spring clamping nut 3, and the spring clamping nut 3 is threadedly connected to the spring clamping nut connecting portion 21, and a clamping spring receiving groove 30 for accommodating a clamping spring 5 is provided in the spring clamping nut 3, and a second clamping surface 31 is provided in the clamping spring 5; the clamping spring 5 is arranged in the clamping spring receiving groove 30; the plug 41 can be inserted into the spring clamping nut 3, and when the plug 41 is inserted into the spring clamping nut 3, the clamping spring 5 can be opened in the radial direction in the clamping spring receiving groove 30 and then clamped in the first clamping tooth 42, and the positioning rod 4 and the spring clamping nut 3 are clamped through the first clamping surface 43, the second clamping surface 31 and the clamping spring 5.

[0049] The spring-clamping mechanical joint disclosed in this application requires only a positioning rod, a spring-clamping nut, and a clamping spring, achieving a quick, reliable connection between concrete piles at a low overall cost. Furthermore, the use of a clamping spring, a first clamping tooth, and a clamping spring receiving groove structure ensures that the plug and spring-clamping nut are subjected to more uniform force in the axial direction, thereby extending the service life of the positioning rod and spring-clamping nut and improving the pullout resistance of the pile connection.

[0050] Furthermore, the first latching teeth 42 are one or more circles of annular latching teeth provided on the plug 41; the clamping spring accommodating groove 30 is one or more circles of annular grooves provided in the spring clamping nut 3; and the clamping spring 5 is an annular clamping spring.

[0051] Specifically, in the present application, one or more annular latching tooth structures can be provided on the plug 41 to form a first latching tooth 42, and one or more annular grooves can be processed in the spring latching nut 3 to form a latching spring accommodating groove 30. The latching spring is an annular latching spring, and the latching spring has one or more. A latching spring can be provided in each latching spring accommodating groove, or a latching spring can be provided in several of the latching spring accommodating grooves, thereby realizing the latching of the positioning rod and the spring latching nut.

[0052] Furthermore, the first latching tooth 42 is a spiral latching tooth provided on the plug 41; the clamping spring accommodating groove 30 is a spiral groove provided in the spring clamping nut 3; and the clamping spring 5 is a spiral clamping spring.

[0053] Specifically, in the present application, a spiral tooth structure is preferably provided on the plug 41 to form a first tooth 42, and a spiral groove structure is processed in the spring clamping nut to form a clamping spring accommodating groove 30. The clamping spring adopts a spiral clamping spring. This structure is not only convenient for processing and installation, but also, due to the use of a spiral structure, the positioning rod, the spring clamping nut and the clamping spring are subjected to more uniform force in the axial length direction, thereby improving the service life of the positioning rod and the spring clamping nut, and improving the pull-out resistance of the pile connection.

[0054] Furthermore, the cross section of the clamping spring 5 is triangular, circular or polygonal.

[0055] Specifically, in the present application, the cross-section of the spiral clamping spring can be set to different shapes. In the present embodiment, the cross-section of the spiral clamping spring can be triangular, circular or polygonal. When the cross-section is triangular, circular or polygonal, the shape of the clamping spring accommodating groove and the first clamping tooth is adapted to the cross-sectional shape of the clamping spring, so as to realize the clamping of the positioning rod and the spring clamping nut through clamping springs of different shapes.

[0056] Furthermore, when the cross section of the clamping spring 5 is circular, after the clamping spring 5 is clamped in the first clamping tooth 42, the outer diameter corresponding to the tooth top of the first clamping tooth 42 is greater than or equal to the diameter corresponding to the center of the cross section of the clamping spring 5;

[0057] When the cross-section of the latching spring 5 is triangular, the ratio of the width of the first latching tooth 42 to the cross-sectional width of the latching spring 5 is less than or equal to 1 / 2, and the height of the first latching tooth 42 is consistent with the cross-sectional height of the latching spring 5; the ratio of the height of the first latching tooth 42 to the slot height of the latching spring accommodating slot 30 is equal to 1 / 2.

[0058] Specifically, when the cross-section of the clamping spring 5 is circular, after the clamping spring 5 is clamped in the first clamping tooth 42, the outer diameter corresponding to the tooth top of the first clamping tooth 42 is greater than or equal to the diameter corresponding to the center of the cross-section of the clamping spring 5 (that is, the middle diameter of the clamping spring). At this time, there is a larger clamping part between the first clamping surface 43 on the first clamping tooth 42 and the clamping spring 5, thereby improving the clamping strength; when the cross-section of the clamping spring is triangular, the ratio of the width of the first clamping tooth 42 to the cross-sectional width of the clamping spring 5 is less than or equal to 1 / 2, and the height of the first clamping tooth 42 is consistent with the cross-sectional height of the clamping spring 5; the ratio of the height of the first clamping tooth 42 to the slot height of the clamping spring accommodating slot 30 is equal to 1 / 2, so that the clamping tooth, the clamping spring and the spring clamping nut can be effectively clamped.

[0059] Furthermore, if Figure 5 and Figure 6 As shown, in this embodiment, the cross-section of the clamping spring 5 is an equilateral triangle, that is, when the clamping spring is a spiral clamping spring, and the cross-section of the spiral clamping spring is an equilateral triangle, the spiral clamping spring, the plug and the spring clamping nut are all in surface contact when clamped, thereby obtaining better anti-pullout performance.

[0060] Furthermore, when the cross-section of the clamping spring 5 is an equilateral triangle, the ratio of the width of the spiral clamping tooth to the width of the cross-section of the spiral clamping spring is less than or equal to 1 / 2, and the height of the spiral clamping tooth is consistent with the height of the cross-section of the spiral clamping spring; the ratio of the height of the spiral clamping tooth to the height of the spiral groove is equal to 1 / 2, so that the clamping tooth, the clamping spring and the spring clamping nut can be effectively clamped.

[0061] Furthermore, the spiral tooth is a double-line spiral tooth structure, the spiral groove is a single-line spiral groove, the groove pitch P2 of the spiral groove, the pitch P1 of the spiral tooth and the pitch P3 of the spiral clamping spring are consistent, the groove height H2 of the spiral groove is twice the cross-sectional height H3 of the spiral clamping spring, the groove width W2 of the spiral groove is consistent with the cross-sectional width W3 of the spiral spring, the height H1 of the spiral tooth is consistent with the cross-sectional height H3 of the spiral clamping spring, and the width W1 of the spiral tooth is 1 / 2 of the cross-sectional width W3 of the spiral clamping spring.

[0062] Specifically, in this embodiment, Figure 3 and Figure 4As shown, the spiral teeth are double-threaded, the spiral grooves are single-threaded, the pitch of the spiral grooves is consistent with the pitch of the spiral teeth and the pitch of the spiral spring. The height of the spiral grooves is twice the height of the cross-section of the spiral spring. The width of the spiral grooves is consistent with the width of the cross-section of the spiral spring. The height of the spiral teeth is consistent with the height of the cross-section of the spiral spring. The width of the spiral teeth is 1 / 2 of the width of the cross-section of the spiral spring. This allows the spiral spring to be clamped in the spiral teeth after the plug is inserted into any position of the spring clamp nut, thereby ensuring effective clamping of the positioning rod and the spring clamp nut. At the same time, because the width of the spiral teeth is 1 / 2 of the width of the cross-section of the spiral clamp spring, when the plug, the clamp spring, and the spring clamp nut are subjected to a pull-out force, the force is located at the center of the cross-section of the clamp spring, thereby improving the load-bearing performance of the clamp spring, increasing the strength of the clamp spring, and improving the pull-out resistance of the pile connection.

[0063] Furthermore, a first sawtooth thread structure is provided in the spring clamping nut 3, the groove of the first sawtooth thread structure is the clamping spring accommodating groove 30, and the non-working edge (edge with a larger inclination angle) of the first sawtooth thread structure is the second clamping surface;

[0064] The plug 41 is provided with a second sawtooth thread structure, which is a double-line sawtooth thread. The working edge (edge with a smaller inclination angle) of the second sawtooth thread structure is the first clamping surface 43 .

[0065] In this embodiment, a first serrated thread is provided in the spring clamping nut, the groove of the first serrated thread structure is a clamping spring accommodating groove, and the non-working edge of the first serrated thread structure is a second clamping surface; a serrated thread structure is provided on the plug, the second serrated thread structure is a double-line serrated thread, and the working edge of the second serrated thread structure is the first clamping surface, so that the spiral clamping spring has a larger contact area with the first clamping surface and the second clamping surface. At the same time, the clamping parts of the spring clamping nut and the plug have strong strength, thereby improving the pull-out resistance of the pile connection.

[0066] Furthermore, the included angle between the non-working edge and the working edge of the serrated thread is 60°, so that the positioning rod, the clamping spring and the spring clamping nut have better force-bearing performance, thereby improving the pull-out strength.

[0067] Furthermore, the rotation direction of the spiral clamping teeth is opposite to the rotation direction of the spiral clamping spring of the clamp on the spiral clamping teeth.

[0068] Specifically, in this embodiment, the spiral clamping teeth are arranged in a positive rotation from the end of the plug toward the positioning rod seat; after the spiral clamping spring clamp is in the first clamping teeth, the spiral clamping spring is arranged in a positive rotation from the positioning rod seat toward the end of the plug. Since the spiral clamping teeth are arranged in a positive rotation from the end of the plug toward the positioning rod seat; after the spiral clamping spring clamp is in the first clamping teeth, the spiral clamping spring is arranged in a positive rotation from the positioning rod seat toward the end of the plug, thereby reducing or avoiding the slippage of the positioning rod, the clamping spring and the spring clamping nut along the axial direction of the positioning rod when being pulled.

[0069] Furthermore, the outer diameter D1 corresponding to the tooth top of the first latching tooth 42 is consistent with the inner diameter D2 corresponding to the groove top of the latching spring accommodating groove 30 .

[0070] Specifically, the outer diameter D1 corresponding to the tooth top of the first locking tooth 42 is consistent with the inner diameter D2 corresponding to the groove top of the locking spring accommodating groove 30, so that the positioning rod can be effectively inserted into the spring locking nut.

[0071] Furthermore, the tooth top of the first latching tooth 42 is reduced in diameter to form a tooth top surface 44; the groove top of the latching spring accommodating groove 30 is expanded in diameter to form a groove top surface 32; the outer diameter D1 corresponding to the tooth top surface 44 is smaller than the inner diameter D2 corresponding to the groove top surface 32.

[0072] Specifically, in this embodiment, the tooth top of the first latching tooth 42 is reduced in diameter to form the tooth top surface 44. The reduction treatment in this application is to obtain the tooth top surface by machining the sharper part of the tooth top, so as to remove the sharper part of the tooth tip top, that is, to remove the weak part of the tooth tip top; accordingly, the groove top of the clamping spring accommodating groove is also expanded in diameter, that is, the weak part of the groove top is removed; thereby, the outer diameter corresponding to the tooth top surface 44 is smaller than the inner diameter corresponding to the groove top surface 32, so that the positioning rod can be easily inserted into the spring clamping nut without causing damage to the first latching tooth or the clamping spring accommodating groove. At the same time, since there is a certain gap between the first latching tooth and the clamping spring accommodating groove, the first clamping surface of the first latching tooth and the clamping spring, and the second clamping surface of the clamping spring accommodating groove and the clamping spring can be in closer contact, thereby improving the pull-out resistance of the pile connection.

[0073] Furthermore, the pitch of the spiral teeth is 2.5mm-3mm.

[0074] Specifically, the pitch of the spiral clamping teeth is 2.5mm-3mm, and accordingly, the slot pitch of the clamping spring accommodating groove 30 and the pitch of the spiral clamping spring are both 5mm-6mm. After testing, the strength of the clamping teeth corresponding to the pitch of this size, the clamping spring accommodating groove corresponding to the slot pitch, and the spiral clamping spring corresponding to the pitch after clamping is greater than or equal to the requirements for the connection strength of prefabricated piles in the relevant standards.

[0075] Furthermore, the inner diameter of the clamping spring 5 is equal to or smaller than the diameter corresponding to the tooth root of the first clamping tooth 42 .

[0076] Specifically, the inner diameter of the clamping spring is smaller than the diameter of the tooth bottom of the first clamping tooth, so that after the plug is inserted into the spring clamping nut, the clamping spring can be fastened to the first clamping tooth of the plug, thereby improving the clamping performance of the positioning rod and the spring clamping nut.

[0077] Furthermore, a plug guide portion 45 is provided at the end of the plug 41 .

[0078] Specifically, the end of the plug can be a bevel or a smooth curved surface so that the diameter at the end face of the plug is the smallest and gradually increases to the same diameter as the clamping portion of the plug, thereby forming a plug guide portion, so that when the plug is inserted into the spring clamping nut, the end of the plug can be easily inserted into the spiral clamping spring and the spiral clamping spring can be radially expanded.

[0079] Furthermore, a cutter recess 33 is provided at the end of the spring clamping nut 3 away from the plug 41 for insertion.

[0080] Specifically, a back-off groove is provided at the end of the spring clamping nut away from the plug insertion. Due to the back-off groove, the bottom depth of the serrated thread in the spring clamping nut can be ensured to be consistent, thereby improving the connection performance between the positioning rod and the spring clamping nut.

[0081] Furthermore, a spring clamping nut tightening structure 34 is provided at one end of the spring clamping nut 3 close to the insertion of the plug 41 ; and a positioning rod tightening structure 46 is provided at the end of the plug 41 .

[0082] Specifically, the nut sleeve tightening structure can be a spring-clamping nut with an "I"-shaped groove or a polygonal groove structure at the end close to the plug insertion, so that the spring-clamping nut can be quickly connected to the second nut sleeve by clamping an "I"-shaped screwdriver or a polygonal screwdriver through an electric tool; a polygonal hole is provided at the end of the plug, and the positioning rod can be quickly connected to the first nut sleeve by clamping a polygonal screwdriver through an electric tool.

[0083] like Figure 7 The figure shows the prefabricated pile connection structure disclosed in the present invention, comprising: a prefabricated pile body 60 and the mechanical joint disclosed in the present application;

[0084] The two ends of the main reinforcement 61 in the precast pile body 60 are connected to the first nut sleeve 1 and the second nut sleeve 2 respectively;

[0085] The first nut sleeve 1 is connected to the positioning rod 4, the second nut sleeve 2 is connected to the spring clamping nut 3, and the spring clamping nut 3 is provided with the clamping spring 5; the two adjacent prefabricated piles are clamped and connected by the first nut sleeve 1, the second nut sleeve 2, the spring clamping nut 3, the positioning rod 4 and the clamping spring 5.

[0086] Specifically, the precast pile includes a precast pile body 60 and a steel cage arranged in the precast pile body, the steel cage includes main reinforcement 61 and stirrups, the two ends of the main reinforcement 61 are respectively connected to the first nut sleeve 1 and the second nut sleeve 2; the first nut sleeve 1 is connected to the positioning rod 4, and the second nut sleeve 2 is connected to the spring clamping nut 3, and the spring clamping nut 3 is provided with a clamping spring 5; when two adjacent sections of precast piles are connected, one end of the positioning rod in the upper section of the pile can be inserted into one end of the spring clamping nut in the lower section of the pile, and the positioning rod, the spring clamping nut and the clamping spring are clamped with each other, thereby realizing the connection between the two sections of the pile.

[0087] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A spring-clamped mechanical joint, characterized in that: include: A first nut sleeve (1), a second nut sleeve (2), a spring clamping nut (3), a positioning rod (4), and a clamping spring (5); One end of the first nut sleeve (1) is provided with a first main rib connecting portion (10) for connecting to a main rib (61), and the other end is provided with a positioning rod connecting portion (11) for connecting to a positioning rod (4); The positioning rod (4) comprises a positioning rod seat (40) and a plug (41) arranged on the positioning rod seat (40); the positioning rod (4) is connected to the positioning rod connecting portion (11) via the positioning rod seat (40); the plug (41) is provided with a first latching tooth (42); and the first latching tooth (42) is provided with a first latching surface (43); One end of the second nut sleeve (2) is provided with a second main rib connecting portion (20) for connecting to the main rib (61), and the other end is provided with a spring clamping nut connecting portion (21) for connecting to the spring clamping nut (3); The spring clamping nut (3) is installed in the spring clamping nut connecting portion (21), a clamping spring receiving groove (30) for receiving the clamping spring (5) is provided in the spring clamping nut (3), and a second clamping surface (31) is provided in the clamping spring receiving groove (30); The clamping spring (5) is arranged in the clamping spring receiving groove (30); the plug (41) can be inserted into the spring clamping nut (3); when the plug (41) is inserted into the spring clamping nut (3), the clamping spring (5) can be opened in the radial direction in the clamping spring receiving groove (30) and clamped in the first clamping tooth (42), and the clamping of the positioning rod (4) and the spring clamping nut (3) is achieved through the first clamping surface (43), the second clamping surface (31) and the clamping spring (5).

2. The spring-clamped mechanical joint according to claim 1, characterized in that: The first latching teeth (42) are one or more ring-shaped latching teeth arranged on the plug (41); the clamping spring accommodating groove (30) is one or more ring-shaped grooves arranged in the spring clamping nut (3); and the clamping spring (5) is an annular clamping spring.

3. The spring-clamped mechanical joint according to claim 1, characterized in that: The first latching tooth (42) is a spiral latching tooth provided on the plug (41); the clamping spring accommodating groove (30) is a spiral groove provided in the spring clamping nut (3); and the clamping spring (5) is a spiral clamping spring.

4. The spring-clamped mechanical joint according to claim 1 or 2, characterized in that: The cross section of the clamping spring (5) is triangular, circular or polygonal.

5. The spring-clamped mechanical joint according to claim 3, characterized in that: When the cross section of the clamping spring (5) is circular, after the clamping spring (5) is clamped in the first clamping tooth (42), the outer diameter corresponding to the tooth top of the first clamping tooth (42) is greater than or equal to the diameter corresponding to the center of the cross section of the clamping spring (5); When the cross section of the clamping spring (5) is triangular, the ratio of the width of the first clamping tooth (42) to the width of the cross section of the clamping spring (5) is less than or equal to 1 / 2, the height of the first clamping tooth (42) is consistent with the height of the cross section of the clamping spring (5); and the ratio of the height of the first clamping tooth (42) to the height of the slot of the clamping spring accommodating slot (30) is equal to 1 / 2.

6. The spring-clamped mechanical joint according to claim 3, characterized in that: The cross section of the clamping spring (5) is an equilateral triangle.

7. The spring-clamped mechanical connector according to claim 6, characterized in that: When the cross section of the clamping spring (5) is an equilateral triangle, the ratio of the width of the spiral clamping tooth to the width of the cross section of the spiral clamping spring is less than or equal to 1 / 2, the height of the spiral clamping tooth is consistent with the height of the cross section of the spiral clamping spring; and the ratio of the height of the spiral clamping tooth to the height of the spiral groove is equal to 1 / 2.

8. The spring-clamped mechanical joint according to claim 7, characterized in that: The spiral tooth is a double-line spiral tooth structure, and the spiral groove is a single-line spiral groove. The pitch of the spiral groove, the pitch of the spiral tooth and the pitch of the spiral clamping spring are consistent. The groove height of the spiral groove is twice the cross-sectional height of the spiral clamping spring. The groove width of the spiral groove is consistent with the cross-sectional width of the spiral clamping spring. The height of the spiral tooth is consistent with the cross-sectional height of the spiral clamping spring. The width of the spiral tooth is 1 / 2 of the cross-sectional width of the spiral clamping spring.

9. The spring-clamped mechanical connector according to claim 8, characterized in that: The spring clamping nut (3) is provided with a first sawtooth thread structure, the groove of the first sawtooth thread structure is the clamping spring accommodating groove (30), and the non-working edge of the first sawtooth thread structure is the second clamping surface; The plug (41) is provided with a second sawtooth thread structure, the second sawtooth thread structure is a double-line sawtooth thread, and the working edge of the second sawtooth thread structure is a first clamping surface.

10. The spring-clamped mechanical connector according to claim 9, characterized in that: The angle between the non-working edge and the working edge of the serrated thread is 60°.

11. The spring-clamped mechanical connector according to any one of claims 3, 5 to 10, characterized in that: The rotation direction of the spiral clamping teeth is opposite to the rotation direction of the spiral clamping spring of the clamp on the spiral clamping teeth.

12. The spring-clamped mechanical connector according to claim 11, characterized in that: The outer diameter D1 corresponding to the tooth top of the first latching tooth (42) is consistent with the inner diameter D2 corresponding to the groove top of the latching spring accommodating groove (30).

13. The spring-clamped mechanical connector according to claim 12, characterized in that: The tooth top of the first latching tooth (42) is subjected to a diameter reduction process to form a tooth top surface (44); the groove top of the latching spring accommodating groove (30) is subjected to a diameter expansion process to form a groove top surface (32); and the outer diameter D1 corresponding to the tooth top surface (44) is smaller than the inner diameter D2 corresponding to the groove top surface (32).

14. The spring-clamped mechanical connector according to claim 13, characterized in that: The pitch of the spiral teeth is 2.5mm-3mm.

15. The spring-clamped mechanical connector according to claim 1, characterized in that: The inner diameter of the clamping spring (5) is equal to or smaller than the diameter corresponding to the tooth root of the first clamping tooth (42).

16. The spring-clamped mechanical connector according to claim 1, characterized in that: A plug guide portion (45) is provided at the end of the plug (41).

17. The spring-clamped mechanical connector according to claim 1, characterized in that: A knife-retracting groove (33) is also provided at the end of the spring clamping nut (3) that is inserted away from the plug (41).

18. The spring-clamped mechanical connector according to claim 1, characterized in that: The spring clamping nut (3) is provided with a spring clamping nut tightening structure (34) at one end close to the insertion end of the plug (41); and a positioning rod tightening structure (46) is provided at the end of the plug (41).

19. A prefabricated pile connection structure, characterized in that: include: A precast pile body (60) and a mechanical joint according to any one of claims 1 to 18; The two ends of the main reinforcement (61) in the prefabricated pile body (60) are respectively connected to the first nut sleeve (1) and the second nut sleeve (2); The first nut sleeve (1) is connected to the positioning rod (4), the second nut sleeve (2) is connected to the spring clamping nut (3), and the spring clamping nut (3) is provided with the clamping spring (5); two adjacent sections of prefabricated piles are clamped and connected by the first nut sleeve (1), the second nut sleeve (2), the spring clamping nut (3), the positioning rod (4) and the clamping spring (5).

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