Rivet connecting piece

Abstract

The rivet connecting piece comprises a rivet and a lantern ring, the rivet comprises a rivet head section, a thread locking section and a rivet pulling section which are connected in the axial direction of the rivet, the rivet pulling section is composed of a groove pulling part and a stopping part, the groove pulling part comprises a first inclined face, a second plane and a third inclined face which are continuously arranged, and the first inclined face, the second plane and the third inclined face are connected through the stopping part. The first inclined face and the third inclined face form included angles with the axis of the rivet respectively, the second plane is parallel to the axis of the rivet, the stopping part comprises a rivet pulling vertical face connected with the third inclined face, the rivet pulling vertical face is perpendicular to the axis of the rivet, and the rivet adopts the combined design of the inclined faces, the planes and the rivet pulling vertical face through the groove pulling part and the stopping part. Harmful radial force is effectively restrained, stress distribution is optimized, stress concentration is avoided, the service life of a tool is prolonged, riveting stability is improved, and therefore crushing and strength weakening of rivet tail materials caused by the radial force are reduced, and friction force and clamping jaw abrasion are remarkably reduced by reducing the radial force and optimizing the contact form.

Description

Technical Field

[0001] The utility model relates to the technical field of fastener rivets, in particular to a rivet connector. Background Art

[0002] In the solar industry, a large number of fasteners such as bolts and nuts, forged fasteners such as locking bolts and rivets are used in the manufacture of solar brackets and component connections, and these fasteners are required to have reliable strength and fastening properties.

[0003] Rivets are commonly used fasteners in existing fastening methods. They are generally used to connect parts that need to be bolted or riveted. After the assembly is completed, this type of rivet connection has the same fastening force and will never loosen. Figure 7 The rivet structure described includes a rivet bolt 01 and a collar. After the rivet bolt 01 is inserted into the mounting hole from the front side of the connected part, the collar is sleeved on the outer periphery of the rivet bolt from the back side through a threaded connection. The tail of the rivet bolt 01 is provided with a groove tail 02 that cooperates with the clamping claw of the riveter. The groove tail is composed of a continuous smooth arc groove 03 and a short tail tooth. The continuous smooth arc groove 03 is designed to be an arc surface composed of three sections of circular arcs of unequal radius. Finally, the groove portion 01 at the tail of the rivet is clamped by the clamping claw of the riveter to perform riveting, and the collar sleeved on the rivet bolt is riveted; after the riveting is completed, the collar is deformed and radially pressed on the outer periphery of the threaded groove section of the rivet bolt, so that the collar and the rivet bolt are tightly combined and tightened, thereby achieving the function of tightening and installing the connected parts. It can be seen from the structure of the above-mentioned rivet connection that it still has the following problems: according to the riveter's claw clamping the groove tail at the tail end of the rivet, a pulling force is applied along the central axis of the rivet. Since the contact surface is a segment of arc surface, a radial component force will inevitably be generated when the axial tension acts on the arc-shaped contact surface. The greater the curvature of the arc surface, the greater the component force angle may be, and the more obvious the radial force will be. First, the excessive radial force directly squeezes the groove area at the tail end of the rivet, which will weaken the strength of the rivet tail. Secondly, the radial force presses the rivet tail tightly against the clamping jaws, significantly increasing the friction between the contact surfaces. Long-term or high-intensity riveting operations will accelerate the wear of the clamping jaws, increase energy consumption and equipment load. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art, thereby providing a riveting connector that effectively reduces radial pressure, optimizes force distribution, avoids stress concentration, and improves tool life and riveting stability during riveting.

[0005] To achieve the above-mentioned purpose, the utility model provides a rivet connection part, including a rivet and a collar, the rivet including a nail head section, a thread locking section and a rivet section connected in sequence along its axial direction, the collar passes through the rivet section and is connected to the thread locking section, the rivet section consists of a groove portion and a stop portion; the cross-sectional structure of the groove portion includes a first inclined surface, a second plane and a third inclined surface which are continuously arranged, the first inclined surface and the third inclined surface respectively form an angle with the axis of the rivet, the second plane is arranged parallel to the axis of the rivet, the stop portion includes a rivet vertical surface connected to the third inclined surface, and the rivet vertical surface is arranged perpendicular to the axis of the rivet.

[0006] As a preferred solution, the angle formed by the first inclined surface and the axis of the rivet is 7° to 13°, and the angle formed by the third inclined surface and the axis of the rivet is 30° to 50°.

[0007] As a preferred solution, the groove portion is connected to the thread locking section via a first inclined surface, and the length of the first inclined surface is respectively greater than the length of the second plane and the third inclined surface.

[0008] As a preferred solution, the grooving portion is composed of a first cone, a second column and a third cone connected in sequence, the third cone is connected to the stop portion, the first inclined surface is arranged on the outer wall of the first cone, the second plane is arranged on the outer wall of the second column, and the third inclined surface is arranged on the outer wall of the third cone.

[0009] As a preferred solution, the diameter of the first cone gradually decreases from the thread locking section to the second cylindrical body, and the diameter of the third cone gradually increases from the second cylindrical body to the stop portion.

[0010] As a preferred solution, the front end of the stop portion away from the groove portion is provided with a guide slope for guiding the clamping claw of the riveter to be clamped between the groove portion and the stop portion. The stop portion is cylindrical and its diameter is larger than the diameter of the third cone.

[0011] As a preferred solution, the thread locking section includes a thread tooth and a spiral groove spirally arranged on its outer peripheral side wall, the cross-sectional shape of the thread tooth is a trapezoidal structure, the two sides of the thread tooth are respectively a tooth profile bevel, and the bottom of the spiral groove is connected to the tooth profile bevel through an arc surface.

[0012] As a preferred solution, the thread teeth are formed with tooth profile angles ∠1 and ∠2 of asymmetrical structures by tooth profile bevels on both sides, and the tooth profile angle ∠1 is greater than the tooth profile angle ∠2.

[0013] As a preferred solution, the collar is composed of a flange portion and a collar body, and a riveting indicator strip is provided on the flange portion. The inner wall of the collar body is provided with a section of spiral teeth threadedly connected to the threaded locking section.

[0014] As a preferred solution, the ratio of the outer diameter to the inner diameter of the collar body is between 1.56 and 1.70. The collar is riveted into the spiral groove of the threaded locking section by a riveter, and cooperates with the threaded locking section to form a riveted fixing portion distributed along the spiral groove.

[0015] The technical solution of the utility model has the following advantages over the prior art:

[0016] 1. In the rivet connector provided by the present invention, the groove portion and the stop portion adopt a combination design of an inclined surface, a flat surface and a vertical surface of the rivet. The clamping claw is hooked in the groove portion and fits on the vertical surface of the rivet, so that the axial tension generated by the clamping claw when riveting is mainly directly applied to the vertical surface of the rivet and the third inclined surface. This vertical surface of the rivet ensures that the tension is efficiently transmitted along the axial direction, reducing the energy loss caused by the component force, avoiding the large radial component force generated by the curvature of the existing curved surface structure, and using the third inclined surface to reduce the residual radial component force through a specific angle design, and can also eliminate the stress concentration phenomenon during the riveting process. Although the inclined surface will also produce The radial component of force is generated, but its inclination angle is usually designed to be flatter than the equivalent angle of the arc surface, so the radial separation is naturally smaller. Another part of the force applied to the second plane hardly generates a radial component pointing to the center, which can significantly reduce the radial pressure, thereby greatly reducing the crushing and strength weakening of the rivet tail material caused by the radial force. At the same time, by reducing the radial force and optimizing the contact form, the friction and jaw wear are significantly reduced. The rivet adopting this technical solution effectively suppresses harmful radial force, optimizes force distribution, avoids stress concentration, and improves tool life and riveting stability through the structural design of the groove part and the stop part.

[0017] 2. In the rivet connector provided by the present invention, the large angle of the third inclined surface controls the radial component of force at a low level and avoids stress concentration, and the radial force can be eliminated through the vertical surface of the rivet. This step-by-step design of reducing radial pressure forms a dual-path load sharing to avoid single-point overload. During use, the clamping jaws are attached to the third inclined surface and the vertical surface of the rivet to form a dual positioning structure of oblique support and axial stop. The greater the rivet pulling force, the tighter the bite of the clamping jaws and the third inclined surface, the better the anti-slip stability, and the risk of slipping, so that the rivet force is completely transmitted along the preset path to avoid force dispersion or offset. This design can improve the efficiency of tension transmission and enhance the pull-out resistance and shear force after riveting. It is particularly suitable for high-intensity, high-frequency continuous riveting operations.

[0018] 3. In the rivet connector provided by the present invention, the groove portion adopts a three-section design of a first cone with a gradually decreasing diameter, a second column with an equal diameter extension, and a third cone with a gradually expanding diameter. In this structural arrangement, the first cone cooperates with the first inclined surface of its outer wall to guide the claw tip to slide smoothly into the deep of the groove, significantly reducing the risk of collision when the clamp is inserted. Since the diameter of the second column is constant, the second plane of its outer wall is parallel to the axis, which can provide rigid support for the clamp hooked in the groove portion. When riveting, the third inclined surface of the third cone is the main force-bearing surface. The radial component of force can be reduced by designing at a specific angle, so that the clamp fits the gradually expanding inclined surface of the third cone. As the riveting force increases, the clamp and the third inclined surface bite tighter, the anti-slip stability is good, the force is more stable, the risk of slipping is avoided, and the working efficiency is improved.

[0019] 4. In the rivet connection provided by the present invention, the thread locking section adopts an asymmetric trapezoidal thread tooth design, and the thread tooth and the spiral groove are transitionally connected by an arc surface, which can disperse the stress concentration at the bottom of the spiral groove during riveting and improve the fatigue life of the thread tooth. This thread tooth has a trapezoidal tooth profile, and the contact area between its top plane and the inner wall of the ring is increased, which can improve the bearing area and shear resistance, and can disperse the pressure generated by the pulling force. During the riveting process, when the ring is squeezed toward the thread locking section by tension, the asymmetric tooth profile angle can guide the ring material to fully flow into the thread gap, forming a tighter tooth profile interlocking effect, increasing the force area, reducing thread stress, and improving the shear strength of the connection piece, achieving the multiple effects of strengthening the rivet fastening force, improving the anti-loosening performance, and extending the service life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific implementation or the description of the prior art.

[0021] Figure 1 A schematic diagram of the installation structure of the rivet connector provided by the present invention;

[0022] Figure 2 This is a schematic structural diagram of the rivet of the present invention;

[0023] Figure 3 This is a structural diagram of the pull riveting section of the rivet of the present invention;

[0024] Figure 4 for Figure 2 A schematic diagram of the local enlarged structure of position A shown;

[0025] Figure 5 This is a schematic cross-sectional structure diagram of the sleeve of the present invention;

[0026] Figure 6This is a schematic diagram of the installation of the rivet and the riveter jaws of the present invention;

[0027] Figure 7 The figure is a structural diagram of a rivet in the prior art.

[0028] Explanation of the accompanying reference numerals: a, rivet; b, collar; c, clamping claw; 1, nail head section; 2, thread locking section; 21, threaded tooth; 22, spiral groove; 23, tooth-shaped inclined surface; 24, arc surface; 3, rivet section; 31, groove portion; 311, first inclined surface; 312, second plane; 313, third inclined surface; 32, stop portion; 321, rivet vertical surface; 33, guide inclined surface; 4, first cone; 5, second column; 6, third cone; 71, collar body; 72, flange portion; 73, spiral tooth. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] Example

[0033] This embodiment provides Figures 1-6The rivet connection part comprises a rivet a and a collar b, wherein the rivet a comprises a nail head section 1, a thread locking section 2 and a rivet section 3 connected in sequence along its axial direction, the collar b passes through the rivet section 3 and is connected to the thread locking section 2, the rivet section 3 consists of a groove portion 31 and a stop portion 32, the clamping jaws of the riveter cooperate and hook between the groove portion 31 and the stop portion 32, wherein the cross-sectional structure of the groove portion 31 comprises a first inclined surface 311, a second plane 312 and a third inclined surface 313 which are continuously arranged, the first inclined surface 311 and the third inclined surface 313 respectively forming an angle with the axis of the rivet a, the second plane 312 is arranged parallel to the axis of the rivet a, the stop portion 32 comprises a rivet vertical surface 321 connected to the third inclined surface 313, and the rivet vertical surface 321 is arranged perpendicular to the axis of the rivet a.

[0034] The above embodiment is the core technical solution of this embodiment, according to the groove portion 31 and the stop portion 32 adopt a combination of inclined surface, flat surface and riveted vertical surface design, and refer to Figure 1 The installation diagram of the riveter clamp and rivet shown in the figure can be seen (attached Figure 1 C in the middle represents a clamping claw), the clamping claw c of the riveter is hooked in the drawing groove part 31 and fits on the rivet vertical surface 321, so that the axial tension generated by the clamping claw when riveting is mainly directly applied to the rivet vertical surface 321 and the third inclined surface 313. This rivet vertical surface 321 ensures that the tension is efficiently transmitted along the axial direction, reduces the energy loss caused by the component force, avoids the large radial component force generated by the curvature of the existing arc surface structure, and uses the third inclined surface 313 to reduce the residual radial component force through a specific angle design, and can also eliminate the stress concentration phenomenon during the riveting process. Although the inclined surface will also generate radial component force, its inclination The angle is usually designed to be flatter than the equivalent angle of the arc surface, so the radial separation is naturally smaller. Another part of the force applied to the second plane 312 hardly produces a radial component pointing to the center, which can significantly reduce the radial pressure, thereby greatly reducing the crushing and strength weakening of the rivet tail material caused by the radial force. At the same time, by reducing the radial force and optimizing the contact form, the friction and jaw wear are significantly reduced. The rivet using this technical solution effectively suppresses harmful radial forces, optimizes force distribution, avoids stress concentration, and improves tool life and riveting stability through the structural design of the groove portion 31 and the stop portion 32.

[0035] The following combination Figure 1-Figure 3 、 Figure 6 The specific structures of the groove portion and the stop portion are described in detail:

[0036] The angle formed by the first bevel 311 and the axis of the rivet a is 7°~13°, and the angle formed by the third bevel and the axis of the rivet a is 30°~50°, wherein the groove portion 31 is connected to the thread locking section 2 through the first bevel 311, and the length of the first bevel 311 is respectively greater than the length of the second plane 312 and the third bevel 313, and the length of the third bevel 313 is designed to be the smallest. It can be seen from the above structure that according to the small angle design of 7°~13° between the first bevel 311 and the axis of the rivet, and the length of the first bevel 311 is the longest, its function is to guide the clamping jaw c to accurately fit into the groove portion 31. This small angle design can convert the lateral displacement force of the clamping jaw into an axial guiding force along the bevel to avoid the clamping jaw from getting stuck. In addition, according to the design of the third inclined surface 313 with a large angle of 30° to 50° to the rivet axis, and the design of the vertical surface 321 of the rivet with a vertical angle of 90° to the rivet axis, the advantage of this design is that when the clamping jaws are in contact with the third inclined surface and apply force, according to the principle of mechanical decomposition, this angle can efficiently convert the tension of the clamping jaws into an axial component force, and only generate a very small radial component force. Compared with the radial force caused by the uncontrollable curvature of the existing arc surface, this design is conducive to reducing the extrusion of the radial force on the groove portion 31 and the clamping jaws, and providing a rigid stop to the clamping jaws through the vertical surface of the rivet and efficient transmission of axial tension, accurately controlling the riveting stroke, and avoiding plastic deformation or cracks at the tail of the rivet due to long-term radial stress, thereby significantly improving the structural durability of the groove portion.

[0037] It is further preferred that the groove portion 31 is composed of a first cone 4, a second cylinder 5 and a third cone 6 connected in sequence, the third cone 6 is connected to the stop portion 32, the first inclined surface 311 is provided on the outer wall of the first cone 4, the second plane 312 is provided on the outer wall of the second cylinder 5, the third inclined surface 313 is provided on the outer wall of the third cone 6, the diameter of the first cone 4 gradually decreases from the thread locking section 2 to the second cylinder 5 side, the diameter of the third cone 6 gradually increases from the second cylinder 5 to the stop portion 32 side, the stop portion 32 is cylindrical, and its diameter is larger than the diameter of the third cone 6. In summary, the groove portion 31 adopts the method of gradually shrinking the diameter of the first cone 4 and the second cylinder 5. The three-stage design has equal diameter extension and gradually expanding diameter of the third cone 6. In this structural setting, the first cone 4 cooperates with the first inclined surface 311 of its outer wall to guide the clamping jaw to slide smoothly into the deep of the groove portion 31, significantly reducing the risk of collision when the clamping jaw is inserted. According to the constant diameter of the second column 5, the second plane 312 of its outer wall is parallel to the rivet axis, which can provide rigid support for the clamping jaw hooked in the groove portion 31. When riveting, the third inclined surface 313 of the third cone 6 is the main force-bearing surface. The radial component of force can be reduced by designing at a specific angle, so that the clamping jaw fits the gradually expanding inclined surface of the third cone. As the riveting force increases, the jaw c bites tighter with the third inclined surface, the anti-slip stability is good, the force is more stable, the risk of slipping is avoided, and the working efficiency is improved.

[0038] like Figure 3 As shown, the stop portion 32 is composed of a cylindrical structure and a cone structure. Specifically, the rear end of the stop portion 32 is provided with a rivet vertical surface 321 connected to the third inclined surface 313. The third inclined surface 313 is connected to the rivet vertical surface 321 to form a certain angle. The front end of the stop portion 32 away from the groove portion 31 is provided with a guide inclined surface 33 for guiding the riveter claw c to be clamped between the groove portion 31 and the stop portion 32. The angle formed by the guide inclined surface 33 and the axis of the rivet is 60°. The guide inclined surface 33 guides the claw into position, that is, guides the claw to be smoothly clamped between the groove portion 31 and the stop portion 32, reducing the requirements for the worker's operating accuracy and equipment positioning accuracy.

[0039] It can be seen from the structural arrangement of the above-mentioned groove portion 31 and the stop portion 32 that the axial tension during riveting by the clamp c mainly acts on the third inclined surface 313 and the riveted vertical surface 321. The large angle of the third inclined surface 313 controls the radial component of force at a low level and avoids stress concentration, and the radial force can be eliminated by the riveted vertical surface 321. This step-by-step design of reducing radial pressure forms a dual-path load sharing to avoid single-point overload. During use, the clamp is attached to the third inclined surface and the riveted vertical surface to form a dual positioning structure of oblique support and axial stop. The greater the riveting tension, the tighter the engagement between the clamp c and the third inclined surface 313, so that the riveting force is transmitted along the preset path to avoid force dispersion or offset. This design can improve the efficiency of tension transmission, enhance the pull-out resistance and shear force after riveting, and is particularly suitable for high-intensity, high-frequency continuous riveting operations.

[0040] In this embodiment, combined with Figure 2 and Figure 4 The specific structure of the thread locking section 2 is described in detail: the thread locking section 2 includes a thread tooth 21 and a spiral groove 22 spirally arranged on its outer peripheral side wall. The cross-sectional shape of the thread tooth 21 is a trapezoidal structure. The two sides of the thread tooth 21 are respectively a tooth profile bevel 23. The bottom of the spiral groove 22 is connected to the tooth profile bevel 23 through an arc surface 24. This can disperse the stress concentration at the bottom of the spiral groove 22 during riveting and improve the fatigue life of the thread tooth 21. Figure 4 As shown in the arrangement, the thread tooth 21 is formed with an asymmetrical structure of tooth profile angle ∠1 and tooth profile angle ∠2 by tooth profile bevels 23 on both sides. The tooth profile angle ∠1 is larger than the tooth profile angle ∠2. Specifically, the tooth profile angle ∠1 is 25°~35°, and the tooth profile angle ∠2 is 20°~30°. When the pulling force is applied, the large-angle side tooth profile bevel can more efficiently convert the axial force into a radial locking force, so that the ring b and the thread tooth 21 fit more closely, thereby improving the pull-out resistance and enhancing the anti-loosening performance. It can be seen from the above structure that the thread locking section 2 adopts an asymmetric trapezoidal thread tooth design, and the thread tooth 21 and the spiral groove 22 are transitionally connected by an arc surface 24. The advantage of this design is that the thread tooth 21 is a trapezoidal tooth profile, and the contact area between its top plane and the inner wall of the ring b is increased, which can improve the bearing area and shear resistance, and can disperse the pressure generated by the pulling force. During the riveting process, when the ring is squeezed toward the thread locking section 2 by tension, the asymmetric tooth profile angle can guide the ring material to fully flow into the thread gap, forming a tighter tooth profile interlocking effect, increasing the force area, reducing thread stress, and improving the shear strength of the connecting part, achieving the multiple effects of strengthening the riveting fastening force, improving the anti-loosening performance, and extending the service life cycle.

[0041] Further preferably, the collar b is composed of a flange portion 72 and a collar body 71, and a riveting indicator strip is provided on the flange portion 72. The inner wall of the collar body 71 is provided with a section of spiral teeth 73 threadedly connected to the threaded locking section 2. Figure 1 As shown, before riveting, the collar b can be moved and adjusted along the thread locking section 2 by the spiral teeth 73, so that the collar b cooperates with the rivet a to press the connected part between the two, and then the collar b and the rivet a are riveted and fastened by the riveter, wherein the ratio of the outer diameter to the inner diameter of the collar body 71 is between 1.56 and 1.70, and the collar b is riveted and embedded in the spiral groove 22 of the thread locking section 2 by the riveter, and cooperates with the thread locking section 2 to form a rivet distributed along the spiral groove 22. The fixing part is closed, and the ring b and the rivet a are inseparable after being riveted and fixed. With this structural arrangement, the diameter ratio of the ring b allows the ring material to be filled into the spiral groove 22 first (rather than bulging irregularly) after the ring is subjected to the pressure of the riveter. Combined with the asymmetric tooth profile of the threaded locking section 2, the ring b and the threaded locking section 2 form a double locking effect of tooth interlocking and groove embedding, which can disperse stress along the spiral groove, increase axial pulling force, provide greater locking pressure, and thus improve the anti-loosening performance and tensile performance of the riveted connection.

[0042] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A rivet connector, comprising a rivet (a) and a collar (b), wherein the rivet (a) comprises a nail head section (1), a thread locking section (2) and a rivet section (3) connected in sequence along its axial direction, the collar (b) passes through the rivet section (3) and is connected to the thread locking section (2), and the rivet section (3) consists of a groove portion (31) and a stop portion (32), and is characterized in that: The cross-sectional structure of the groove portion (31) includes a first inclined surface (311), a second plane (312) and a third inclined surface (313) which are arranged continuously. The first inclined surface (311) and the third inclined surface (313) are respectively arranged at an angle with the axis of the rivet (a). The second plane (312) is arranged parallel to the axis of the rivet (a). The stop portion (32) includes a rivet vertical surface (321) connected to the third inclined surface (313). The rivet vertical surface (321) is arranged perpendicular to the axis of the rivet (a).

2. The rivet connector according to claim 1, characterized in that: The angle formed by the first inclined surface (311) and the axis of the rivet (a) is 7° to 13°, and the angle formed by the third inclined surface (313) and the axis of the rivet (a) is 30° to 50°.

3. The rivet connector according to claim 2, characterized in that: The groove portion (31) is connected to the thread locking section (2) via a first inclined surface (311), and the length of the first inclined surface (311) is respectively greater than the length of the second plane (312) and the length of the third inclined surface (313).

4. The rivet connector according to claim 3, characterized in that: The groove portion (31) is composed of a first cone (4), a second column (5) and a third cone (6) connected in sequence, the third cone (6) is connected to the stop portion (32), the first inclined surface (311) is arranged on the outer wall of the first cone (4), the second plane (312) is arranged on the outer wall of the second column (5), and the third inclined surface (313) is arranged on the outer wall of the third cone (6).

5. The rivet connector according to claim 4, characterized in that: The diameter of the first cone (4) gradually decreases from the thread locking section (2) to the second column (5), and the diameter of the third cone (6) gradually increases from the second column (5) to the stop portion (32).

6. The rivet connector according to claim 4, characterized in that: A guide slope (33) is provided at the front end of the stop portion (32) away from the groove portion (31) for guiding the clamping claw (c) of the riveter to be clamped between the groove portion (31) and the stop portion (32); the stop portion (32) is cylindrical in shape, and its diameter is larger than the diameter of the third cone (6).

7. The rivet joint according to any one of claims 1 to 6, characterized in that: The thread locking section (2) comprises a thread tooth (21) and a spiral groove (22) spirally arranged on its outer peripheral side wall, the cross-section of the thread tooth (21) is a trapezoidal structure, both sides of the thread tooth (21) are tooth-shaped inclined surfaces (23), and the bottom of the spiral groove (22) is connected to the tooth-shaped inclined surface (23) through an arc surface (24).

8. The rivet joint according to claim 7, characterized in that: The thread teeth (21) are formed with tooth profile angles ∠1 and ∠2 of an asymmetrical structure by tooth profile bevels (23) on both sides, and the tooth profile angle ∠1 is greater than the tooth profile angle ∠2.

9. The rivet joint according to any one of claims 1 to 6, characterized in that: The collar (b) is composed of a flange portion (72) and a collar body (71), and a riveting indicator strip is provided on the flange portion (72). The inner wall of the collar body (71) is provided with a section of spiral teeth (73) threadedly connected to the thread locking section (2).

10. The rivet joint according to claim 9, characterized in that: The ratio of the outer diameter to the inner diameter of the collar body is between 1.56 and 1.

70. The collar (b) is riveted and embedded in the spiral groove (22) of the threaded locking section (2) by a riveter, and cooperates with the threaded locking section (2) to form a riveted fixing portion distributed along the spiral groove (22).

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