Hexagonal riveting piece used on non-metal sheet workpiece

Abstract

The utility model provides a hexagonal riveting piece used on a non-metal sheet workpiece. The hexagonal riveting piece comprises a pull riveting stud shell and a stud arranged in the pull riveting stud shell in a sleeved mode. The riveting stud shell comprises a shell upper section and a shell lower section, and a step structure is formed between the shell upper section and the shell lower section; the head flange is integrally arranged at the top of the shell upper section; the peripheral surfaces of the shell upper section and the shell lower section are hexagonal surfaces and are perpendicular to the head flange; and a multi-deformation unit is arranged in a cavity which penetrates through the stud and is formed in the center of the lower section of the shell. A two-section type hexagonal structure is adopted in the deformation area, located below the head flange, of the pull riveting stud shell, after the pull riveting stud shell is installed on a plastic workpiece, the anti-rotation capacity of a rivet nut is effectively improved, and the effect of rotation torque of the rivet nut connected to a plastic plate is improved; a multi-deformation unit is adopted in the pull riveting stud shell, a one-time deformation area is combined with the lower end of a step structure to serve as a supporting point, and good concentricity and perpendicularity between the pull riveting stud shell and a stud after the pull riveting stud shell is installed on a plastic workpiece are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, in particular to the technical field of riveted studs, and specifically is a hexagonal riveted piece used on a non-metallic thin plate workpiece. Background Art

[0002] Ordinary rivet studs usually adopt the structure of round body rivet studs. Due to the round body structure, they will have poor effects when used on plastic workpieces, mainly due to the following aspects:

[0003] 1. When using existing round rivet studs, the edge of the workpiece opening needs to be used as a force support point during the riveting process, which makes the plastic workpiece very easy to deform and crack;

[0004] 2. The existing round rivet studs need to use the edge of the workpiece opening as a force support point during the riveting process. Once the plastic is deformed, the stud will be more likely to be skewed and out of center, resulting in the problem that the stud is easily eccentric after installation on the plastic workpiece, causing difficulties in subsequent assembly;

[0005] 3. The existing round body structure and the rivet stud with a shape are adopted. Although the special shape changes the stress point of the rivet nut, there is no need for the edge of the plate hole as support, and the plastic will not crack after the installation deformation. However, due to the small rotation torque of the rivet stud and the insufficient torque, the rivet point of the rivet stud is prone to rotation, which will cause the connection point failure in severe cases.

[0006] The prior art discloses a fixed sealing rivet nut, a fixed sealing rivet mechanism, and a device after the fixed sealing rivet mechanism is connected. Patent No. CN115342114A discloses a fixed sealing rivet nut, a fixed sealing rivet mechanism, and a device after the fixed sealing rivet mechanism is connected, comprising: a rod; a flange portion sleeved at one end of the rod and fixedly connected thereto; a step portion sleeved on the rod and located on the side of the flange portion adjacent to the rod portion, and the step portion is fixedly connected to the rod portion; wherein the outer diameter of the step portion is greater than the outer diameter of the rod portion, and an adhesive portion is provided on the side of the flange portion adjacent to the step portion. The step portion and the rod portion of the present invention can play a fixed limiting role on the plate. In addition, the inner hole of the plate can also be prevented from being deformed during the installation process, thereby improving the performance and production yield of the product. The step portion can be prevented from affecting the second plate, ensuring that the first plate and the second plate can be completely fitted after riveting, thereby improving the sealing performance. However, although the deformed portion, the step structure, and the hexagonal structure are disclosed, the deformed areas are different, and the plate installation positions are different. In addition, the bottom structure is not disclosed.

[0007] The prior art discloses a double-step sealed rivet nut, a double-step sealed rivet mechanism and a device after the double-step sealed rivet mechanism is connected. Patent No. CN114046308A discloses a double-step sealed rivet nut, a double-step sealed rivet mechanism and a device after the double-step sealed rivet mechanism is connected, including: a rod; a flange portion sleeved on one end of the rod and fixedly connected thereto; a first step portion sleeved on one end of the rod adjacent to the flange portion and fixedly connected thereto; a second step portion sleeved on the rod and located on a side of the flange portion away from the first step portion, which is fixedly connected to the rod, and an annular space is provided between the second step portion and the flange portion; wherein the outer diameter of the first step portion is smaller than the outer diameter of the flange portion, and the outer diameter of the second step portion is smaller than the outer diameter of the first step portion. By providing a first step portion on the flange portion, the present application can concentrate the force of the rivet nut during the installation process on the rod position, thereby improving the clamping force after installation; by providing a second step portion below the flange portion, the strength of the lower end of the first step portion can be increased to avoid deformation after installation, thereby improving the performance of the product. However, although the deformed part, the step structure and the hexagonal structure are disclosed, the deformed areas are different and the plate installation positions are different. In addition, the bottom structure is not disclosed and the function of the hexagonal structure is also different.

[0008] The prior art discloses a manufacturing method of an insert rivet nut and an insert rivet nut, and the patent number is CN115095591A, which discloses a manufacturing method of an insert rivet nut and an insert rivet nut. The manufacturing method of the insert rivet nut includes the following steps: (a) inserting the screw sleeve into the nut body, so that the external thread of the screw sleeve is butted with the installation thread section in the installation hole of the nut body; (b) using a screw sleeve installation rod to tighten the screw sleeve and the nut body, the installation end of the screw sleeve installation rod is locked with the screw hole of the reduced diameter section of the screw sleeve, and the screw sleeve installation rod is screwed to screw the external thread of the screw sleeve downward into the installation thread section in the nut body, so as to achieve the threaded connection and fixation of the screw sleeve and the nut body. The insert rivet nut is manufactured by the above manufacturing method, and the insert rivet nut includes a screw sleeve and a nut body, and the screw sleeve is threadedly assembled in the installation thread section in the nut body. The manufacturing method of the insert rivet nut and the insert rivet nut of the present invention adopt a parts assembly production method, and the components of the insert rivet nut are produced separately and then assembled, which facilitates production and processing and is beneficial to improving the load-bearing capacity of the insert rivet nut. However, the step structure is located inside the riveted part, the structure is different, and it is used for installation with the washer 2, and the function is also different. In addition, the function of the riveted deformation zone is also different. Summary of the invention

[0009] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a hexagonal rivet used on a non-metallic thin plate workpiece, so as to solve the difficulties of the prior art.

[0010] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a hexagonal rivet for use on a non-metallic sheet workpiece, comprising a rivet stud housing 1 and a stud 2 sleeved in the rivet stud housing 1;

[0011] The rivet stud housing 1 comprises:

[0012] The upper shell section 11;

[0013] A lower shell section 12, wherein the lower shell section 12 is integrally arranged at the bottom of the upper shell section 11, and the outer diameter of the lower shell section 12 is smaller than the outer diameter of the upper shell section 11, and a step structure 13 is formed therebetween;

[0014] A head flange 14, wherein the head flange 14 is integrally arranged on the top of the upper section 11 of the housing, and is horizontally oriented outward to form a structure in which the upper and lower surfaces are horizontal;

[0015] The outer peripheral surfaces of the upper shell section 11 and the lower shell section 12 are hexagonal surfaces and are arranged perpendicular to the head flange 14;

[0016] A cavity 3 passing through the stud 2 is formed at the center of the lower section 12 of the housing and is provided with a multiple deformation unit.

[0017] Furthermore, the head flange 14 adopts a large diameter design, and the upper and lower surfaces of the head flange 14 are parallel. The upper flange surface of the head flange 14 is used to add a logo or identification design for anti-counterfeiting or anti-error. The lower flange surface of the head flange 14 does not adopt a toothed or special shape design. The lower flange surface is a smooth plane design. After riveting, the force on the contact surface of the upper surface of the workpiece can be more evenly and dispersed.

[0018] In the present technical solution, the rivet stud shell 1 and the stud 2 are sleeved and installed on the workpiece, and then the rivet stud shell 1 is deformed by a rivet gun to achieve the effect of tightly locking on the plate. Since the deformation zone of the rivet stud shell 1 located under the head flange 13 adopts a two-stage hexagonal structure, after being installed on the plastic workpiece, it can effectively increase the anti-rotation ability of the rivet nut and improve the effect of the rotational torque connected to the plastic plate; in addition, a multiple deformation unit is used inside the rivet stud shell 1, and the primary deformation area is used as the supporting surface when deforming with the plate, and the edge of the plastic workpiece hole is not required as the supporting surface, which well protects the plastic from being squeezed or cracked. At the same time, the two-stage multiple deformation unit structure, and the lower end of the step structure 13 is combined as a support point, which is conducive to ensuring the good concentricity and verticality between the rivet stud shell 1 and the stud 2 after being installed on the plastic workpiece.

[0019] According to a preferred embodiment, the step structure 13 provided between the upper shell section 11 and the lower shell section 12 adopts a chamfered transition.

[0020] In the present technical solution, chamfered transition is adopted at the joint of the two hexagonal structures on the outer side of the rivet stud shell 1. Since there is a width difference between the two outer sides of the body, when the rivet stud shell 1 is deformed, the final stress point is mainly concentrated at this position. The chamfered transition can well protect the workpiece and subject it to more extrusion pressure; and the deformation ends at this position, which can reduce the influence of the workpiece on the riveting deformation and improve the verticality and concentricity of the rivet stud after installation.

[0021] According to a preferred embodiment, after the rivet stud housing 1 is deformed by clamping the plate, the lower end of the step structure 13 forms a supporting point 15 .

[0022] In the technical solution, when the height of the upper section 11 of the shell and the step structure 13 is close to the thickness of the riveted workpiece, that is, the contact area between the riveted deformation area and the workpiece is increased. This design changes the force point of the rivet stud shell 1 when the rivet stud is deformed by riveting. When the rivet stud shell 1 is installed, the lower end of the step structure 13 can be used as the deformation support point 15 when the deformation area clamps the plate, and the edge of the plate will not be squeezed, protecting the plate from deformation and cracking;

[0023] In addition, since the lower end of the step structure 13 serves as the support point 15 when the rivet stud is installed and deformed, the support point 15 will not be affected by the flatness caused by the deformation of the plate, so the state of both sides of the deformation area will be more stable and more uniform, and the stud 2 will be less likely to have eccentricity and skewness after installation;

[0024] Furthermore, due to the design of the step structure 13, the length of the deformation area can be designed to be longer, and the contact surface with the workpiece clamping is correspondingly increased during riveting deformation, so that the clamping area is more evenly stressed.

[0025] According to a preferred embodiment, the lower shell section 12 is reduced inwardly by 0.1-0.3 mm on one side compared to the upper shell section 11 .

[0026] Furthermore, the size of the upper shell section 11 can be designed using conventional rivet nut sizes, such as M68.9.

[0027] In the technical solution, the width of the hexagonal outer side surface of the lower section 12 of the rivet stud shell is reduced, and the width of the hexagonal outer side surface is reduced by 0.1-0.3mm on one side inward, so as to reduce the deformation force of this section, so that the structure after riveting deformation is easier to press on the workpiece, and ensure that when the rivet stud is riveted to the workpiece, the folding clamping area is always in this section area;

[0028] As for the upper section 11 of the shell, compared with other disclosed rivet nuts which usually have an enlarged upper section and a normal rivet nut lower section, the size of the upper section of the rivet stud shell provided by the present technical solution does not need to be increased or reduced. The hexagonal surface of the upper section is a straight smooth surface design without any grooves or special feature designs. The hexagonal surface is perpendicular to the flange, and the structure of the lower section 12 of the shell can increase the anti-rotation ability of the rivet nut.

[0029] According to a preferred embodiment, the multiple deformation unit includes:

[0030] A primary riveting deformation zone 16, the top of which is located below the step structure 13;

[0031] A secondary riveting deformation zone 17, wherein the secondary riveting deformation zone 17 is coaxially arranged below the primary riveting deformation zone 16, and the inner diameter of the secondary riveting deformation zone 17 is smaller than the inner diameter of the primary riveting deformation zone 16;

[0032] A primary transition zone 18 is provided between the primary riveting deformation zone 16 and the secondary riveting deformation zone 17 .

[0033] Furthermore, the diameter of the deformation circle of the shell in the secondary riveting deformation zone 17 is 0.1 mm smaller than the diameter of the deformation in the primary riveting deformation zone 16 .

[0034] In the present technical solution, the deformation circular diameter in the secondary riveting deformation zone 17 is 0.1 mm smaller than the deformation diameter in the primary riveting deformation zone 16. This design can ensure that the rivet stud reaches a better concentricity deformation zone after riveting deformation on the plate. The design of the two deformation zones can also ensure more riveting clamping length. After the rivet stud is riveted on the workpiece, a larger stress-bearing surface can be obtained, and the stress is evenly distributed.

[0035] According to a preferred embodiment, a stud connection area 19 is integrally provided in the cavity 3 below the multiple deformation unit, and the inner wall of the stud connection area 19 adopts a light hole structure, a threaded structure, or a toothed structure.

[0036] Furthermore, the inner diameter of the stud connection area 19 is smaller than the inner diameter of the secondary riveting deformation area 17 , and the two are transitionally connected via the secondary transition area 110 .

[0037] In the present technical solution, in order to adapt to the installation of the stud 2 and to form a limit and guide, the hole diameter of the stud connection area 19 is the smallest, and the hole wall can be a smooth hole, threaded shape and flower tooth design, which can increase the friction between the stud 2 and the matching stud connection area 19, forming a tighter connection, reducing the risk of loosening, ensuring that the stud 2 can be smoothly inserted and obtain good connection performance after the stud 2 is connected.

[0038] According to a preferred embodiment, a tail end 111 is integrally extended from one end of the bottom of the rivet stud housing 1 away from the head flange 14 , and the tail end 111 has a chamfered structure.

[0039] Furthermore, after the rivet stud shell 1 and the stud 2 are installed, the joint of the two is pressed together using a mold to form a required shape. After pressing, the threaded teeth are completely embedded in the inner wall of the shell to ensure that the stud 2 is not loose and obtain good connection performance during use.

[0040] In the present technical solution, the tail end 111 is formed by reducing the diameter of the end of the rivet stud housing 1 to facilitate operators to introduce it into the opening of the mold, thereby improving installation efficiency and reducing production costs during the installation process.

[0041] According to the preferred embodiment, the stud 2 is provided with a stud rod 21, a stud connecting rod 22 and a stud lower flange 23 in sequence along the axial direction;

[0042] The outer circumference of the stud rod 21 is provided with an external thread 24;

[0043] The external thread of the stud connecting rod 22 is also provided with knurling 25;

[0044] The outer diameter of the stud lower flange 23 is set larger than the inner diameter of the cavity 3 .

[0045] Furthermore, a guide tooth 26 is provided at one end of the stud rod 21 away from the stud lower flange 23;

[0046] The external thread 24 on the stud rod 21 can be a metric or imperial thread or other special thread design, the pitch can be coarse or fine, and the thread tolerance zone can be designed to az accuracy.

[0047] In the present technical solution, a knurling design is adopted, which can increase the friction of the stud 2, making it easier to lock with the matching rivet stud housing 1, thereby improving the locking force of the stud 2. After assembly, good mechanical properties can be obtained and the anti-loosening ability of the bolt can be enhanced.

[0048] According to a preferred solution, the transition area between the stud connecting rod 22 and the stud lower flange 23 adopts a rounded corner 27 structure.

[0049] Furthermore, a free transition is adopted between the stud rod 21 and the stud connecting rod 22 .

[0050] In the present technical solution, since the outer diameter of the stud lower flange 23 is larger than the outer diameter of the stud connecting rod 22, the stud lower flange 23 is used to mate with the bottom of the rivet stud housing 1, and a chamfer 27 is used for transition between the stud connecting rod 22 and the stud lower flange 23, thereby optimizing stress distribution, reducing the risk of crack generation, and improving load bearing capacity and fatigue life, thereby ensuring the quality and reliability of the connection.

[0051] According to the preferred solution, after installation, the lower surface of the rivet stud housing 1 is tightly fitted to the upper surface of the stud lower flange 23 .

[0052] Furthermore, the rivet stud housing 1 and the stud 2 are connected together by crimping or welding.

[0053] Furthermore, the upper and lower surfaces of the stud lower flange 23 are designed to be parallel, the upper flange plane is designed to be smooth, and the thread direction is perpendicular to the flange plane;

[0054] The bottom middle area of ​​the stud lower flange 23 can be smooth, or can be designed with a conical surface or other special shapes.

[0055] In this technical solution, when the stud is assembled with the shell, the stud is perpendicular to the shell flange, and the shell end is tightly fitted with the stud flange. Combined with the planar structure and the use of crimping or welding connection methods, it is beneficial to maintain good concentricity and verticality between the stud and the shell.

[0056] The utility model has the following beneficial effects:

[0057] (1) The deformation zone of the rivet stud housing 1 located under the head flange 13 adopts a two-stage hexagonal structure. Due to the design of the hexagonal structure, the anti-rotation ability of the rivet nut can be increased through the hexagonal structure, thereby improving the effect of the rotation torque connected to the plastic sheet;

[0058] (2) A step structure 13 is provided between the upper shell section 11 and the lower shell section 12 at the tail of the rivet stud shell 1. When the sum of the heights of the upper shell section 11 and the step structure 3 is close to the thickness of the riveted workpiece, when the rivet stud is installed, the lower end of the step can be used as a support point for deformation when the deformation area clamps the plate, and the edge of the plate will not be squeezed, thereby protecting the plate from deformation and cracking;

[0059] (3) When the lower end of the step is used as the support point when the rivet stud is installed and deformed, it will not be affected by the flatness caused by the deformation of the plate, so the state of both sides of the deformation area will be more stable and more uniform, and the stud will be less likely to have eccentricity and skew after installation;

[0060] (4) Step design, so the length of the deformation area can be designed to be longer, the contact surface with the workpiece clamping is also increased accordingly during riveting deformation, and the clamping area is more evenly stressed;

[0061] (5) A multiple deformation unit is used inside the rivet stud housing 1, and the primary deformation area is used as a support surface when deforming with the plate during installation. The edge of the plastic workpiece hole is not required as a support surface, which well protects the plastic from being crushed or cracked;

[0062] (6) Increasing the diameter of the head flange effectively increases the contact area with the plastic workpiece, and the force on the contact surface of the workpiece is more uniform and dispersed after riveting.

[0063] The best embodiment of the present invention will be described in more detail below in conjunction with the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 The three-dimensional structure diagram of the rivet stud housing in the present invention is shown;

[0065] Figure 2 It is a half-section view of the housing of the rivet stud in the present invention;

[0066] Figure 3 The display is an enlarged schematic diagram of the structure of the stud in the utility model;

[0067] Figure 4 It is an enlarged schematic diagram of the three-dimensional structure of the rivet stud housing and the stud after being assembled and not riveted in the utility model;

[0068] Figure 5 The front view of the rivet stud housing and the stud after assembly without riveting in the utility model is shown;

[0069] Figure 6 The display is an enlarged schematic diagram of the three-dimensional structure of the rivet stud housing and the stud after assembly and riveting in the utility model, which does not include the workpiece plate;

[0070] Figure 7 It is an enlarged schematic diagram of the three-dimensional structure of the rivet stud housing and the stud after assembly and riveting in another perspective in the utility model, wherein the workpiece plate is not included;

[0071] Figure 8 Displayed as the utility model Figure 7 The main view;

[0072] Fig. 9 It shows a cross-sectional view of the rivet stud housing and the stud after assembly and riveting in the utility model;

[0073] Fig.10 Displayed as the utility model Fig. 9 A magnified schematic diagram of the local structure;

[0074] Description of symbols

[0075] 1. Rivet stud housing,

[0076] 11. Upper part of the shell,

[0077] 12. Lower section of the shell,

[0078] 13. Step structure,

[0079] 14. Head flange,

[0080] 15. Support point,

[0081] 16. One-time riveting deformation zone,

[0082] 17. Secondary riveting deformation zone,

[0083] 18. A transition zone,

[0084] 19. Stud connection area,

[0085] 110. Secondary transition zone,

[0086] 111, tail end;

[0087] 2. Studs,

[0088] 21. Stud rod,

[0089] 22. Stud connecting rod,

[0090] 23. Stud flange,

[0091] 24. External thread,

[0092] 25. Knurling,

[0093] 26. Guide teeth,

[0094] 27. Rounded corners;

[0095] 3. Cavity. DETAILED DESCRIPTION

[0096] In order to make the purpose, technical solution and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0097] Compared with the embodiments shown in the drawings, feasible implementations within the scope of protection of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0098] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate quantity restrictions. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0099] The utility model provides a hexagonal rivet used on a non-metallic thin plate workpiece, which is used in a rivet stud installation process. The utility model does not limit the type of the non-metallic thin plate workpiece, but the structure of the hexagonal rivet used on the non-metallic thin plate workpiece is particularly suitable for the needs of plastic workpiece installation.

[0100] In general, the hexagonal rivet used on the non-metallic sheet workpiece proposed in the utility model mainly includes a rivet stud housing 1 and a stud 2 sleeved in the rivet stud housing 1. Figure 1 , which shows the arrangement relationship between the rivet stud housing 1 and the stud 2.

[0101] In order to achieve the purpose of preventing the plastic workpiece from cracking after installation, the rivet stud has a high rotation torque and good concentricity of the stud, and solves the problem that the structure of the round rivet stud is usually used for ordinary riveting studs in the background technology. Due to the round structure, it will produce poor effect when used on plastic workpieces, mainly because of the following aspects: 1. When the existing round rivet stud is used, when the parts need to use the edge of the workpiece opening as a force support point during the riveting process, the plastic workpiece is very easy to deform and crack; 2. In the existing round rivet stud, because the edge of the workpiece opening needs to be used as a force support point during the riveting process, once the plastic is deformed, the stud will be more likely to be skewed and non-concentric, resulting in the problem that the stud is easy to be eccentric after installation on the plastic workpiece, causing difficulties in subsequent assembly; 3. The existing round structure and the rivet stud with a shape are used. Although the special shape changes the force point of the rivet nut, the edge of the plate hole is not needed as support, and the plastic will not crack after the deformation is installed, but due to the small rotation torque of the rivet stud and the insufficient torque, the rivet point of the rivet stud is prone to rotation, which will cause the connection point failure problem in severe cases.

[0102] To this end, in the technical solution provided in this embodiment, the rivet stud shell 1 and the stud 2 are sleeved and installed on the workpiece, and then the rivet stud shell 1 is deformed by a rivet gun to achieve the effect of tightly locking on the plate. Since the deformation zone of the rivet stud shell 1 located under the head flange 13 adopts a two-stage hexagonal structure, after being installed on the plastic workpiece, it can effectively increase the anti-rotation ability of the rivet nut and improve the effect of the rotational torque connected to the plastic plate; in addition, a multiple deformation unit is used inside the rivet stud shell 1, and the primary deformation area is used as the support surface when deforming with the plate, and the edge of the plastic workpiece hole is not required as the support surface, which well protects the plastic from being squeezed or cracked. At the same time, the two-stage multiple deformation unit structure, and the lower end of the step structure 13 is combined as a support point, which is conducive to ensuring the good concentricity and verticality between the rivet stud shell 1 and the stud 2 after being installed on the plastic workpiece.

[0103] Specifically, Figure 1 and 2 As shown, the rivet stud housing 1 includes a housing upper section 11, a housing lower section 12 integrally arranged at the bottom of the housing upper section 11, and a head flange 14 integrally arranged at the top of the housing upper section 11 and horizontally facing outward to form a horizontal structure of upper and lower surfaces; the outer peripheral surfaces of the housing upper section 11 and the housing lower section 12 provided in this embodiment both adopt a hexagonal surface structure and are vertically arranged with the head flange 14. Due to the hexagonal structure, the hexagonal structure can increase the anti-rotation ability of the rivet nut, thereby improving the effect of the rotation torque connected to the plastic sheet.

[0104] Next, since the deformation area of ​​the rivet stud housing 1 in this embodiment is located in the lower section 12 of the housing, Figure 1 and 2 As shown, the outer diameter of the lower section 12 of the shell is smaller than the outer diameter of the upper section 11 of the shell, and a step structure 13 is formed between the two. Specifically, in this embodiment, the lower section 12 of the shell is reduced by 0.1-0.3mm inwardly on one side compared with the upper section 11 of the shell, and the size of the upper section 11 of the shell can be designed with a conventional rivet nut size, such as M68.9. The width of the hexagonal outer side surface of the lower section 12 of the shell of the rivet stud shell is reduced by 0.1-0.3mm inwardly on one side, which can achieve the effect of reducing the deformation force of this section, making it easier to press the structure after riveting deformation on the workpiece, ensuring that when the rivet stud is riveted to the workpiece and deformed, the folding clamping area is always in this section area;

[0105] As for the upper section 11 of the shell, compared with other disclosed rivet nuts that usually have an enlarged upper section and a normal lower section, the upper section of the rivet stud shell provided by the present technical solution does not need to be increased or decreased in size, and the upper hexagonal surface is straight and smooth, without any grooves or special features, and the hexagonal surface is perpendicular to the flange, which can increase the anti-rotation ability of the rivet nut by cooperating with the structure of the lower section 12 of the shell;

[0106] It should be specifically stated that, Fig.10 As shown, because there is a width difference between the outer sides of the upper shell section 11 and the lower shell section 12, on the one hand, when the rivet stud shell 1 is installed with the matching workpiece, when the height of the upper shell section 11 and the step structure 13 is close to the thickness of the riveted workpiece, the step structure 13 changes the force point of the rivet stud shell 1 when the rivet stud is deformed by riveting, and on the basis of increasing the contact area between the riveted deformation area and the workpiece, after the rivet stud shell 1 clamps the plate to deform by riveting, the lower end of the step structure 13 serves as the support point 15 of the plate, so that the edge of the plate will not be squeezed, which is conducive to protecting the plate from deformation and cracking;

[0107] Furthermore, since the lower end of the step structure 13 serves as the support point 15 when the rivet stud is deformed during installation, the support point 15 will not be affected by the flatness caused by the deformation of the plate, so the states on both sides of the deformation area will be more stable and more uniform, and the stud 2 will be less likely to have eccentricity and skewness after installation;

[0108] Furthermore, due to the design of the step structure 13, the length of the deformation area can be designed to be longer, and the contact surface with the workpiece clamping is correspondingly increased during riveting deformation, so that the clamping area is more evenly stressed;

[0109] On the other hand, when the rivet stud shell 1 is deformed, the step structure 13 provided between the shell upper section 11 and the shell lower section 12 adopts a chamfered transition, and the final stress point is mainly concentrated at this position. The chamfered transition can well protect the workpiece and subject it to more extrusion pressure; and after deformation to this position, the influence of the workpiece on the riveting deformation can be reduced, thereby improving the verticality and concentricity of the rivet stud after installation.

[0110] like Figure 2 As shown, from the internal structure of the rivet stud housing 1, a circular cavity 3 is provided in the rivet stud housing 1 corresponding to the installation of the stud 2. In accordance with the structure required for the deformation of the rivet stud housing 1, a cavity 3 passing through the stud 2 is formed at the center of the lower section 12 of the housing, and multiple deformation units are provided in the cavity 3, which is used to achieve the riveting deformation effect.

[0111] Specifically, the multiple deformation unit in this embodiment includes a primary riveting deformation zone 16 and a secondary riveting deformation zone 17, wherein the top of the primary riveting deformation zone 16 is located below the step structure 13, and the secondary riveting deformation zone 17 is coaxially arranged below the primary riveting deformation zone 16, and the inner diameter of the secondary riveting deformation zone 17 is smaller than the inner diameter of the primary riveting deformation zone 16, and a primary transition zone 18 is used to achieve free transition between the two; when the rivet stud shell 1 is deformed by external force, the deformation circular diameter of the rivet stud shell 1 located in the secondary riveting deformation zone 17 is 0.1 mm smaller than the deformation diameter of the primary riveting deformation zone 16. This design can ensure that the rivet stud reaches a better concentricity deformation zone after riveting deformation on the plate. The design of the two deformation zones can also ensure more riveting clamping lengths. After the rivet stud is riveted on the workpiece, a larger force-bearing surface can be obtained and the force is evenly applied.

[0112] As mentioned above, a stud 2 is installed in the rivet stud housing 1. In order to facilitate the insertion of the stud 2 and to guide and limit the stud 2, a stud connection area 19 is also integrally provided in the cavity 3 below the multiple deformation unit. The inner diameter of the stud connection area 19 is smaller than the inner diameter of the secondary riveting deformation area 17. The two are transitionally connected by a secondary transition area 110 with a chamfer, and the inner wall of the stud connection area 19 adopts a light hole structure, a threaded structure or a flower tooth structure. The above design can increase the friction between the stud 2 and the matching stud connection area 19, forming a tighter connection, reducing the risk of loosening, and ensuring that the stud 2 can be smoothly inserted and obtain good connection performance after the stud 2 is connected.

[0113] The bottom of the rivet stud shell 1 is integrally extended with a tail end 111 at one end away from the head flange 14. The tail end 111 of the rivet stud shell 1 in a free state adopts a chamfered structure. When the rivet stud shell 1 and the stud 2 are installed, the joint of the two is pressed into a required shape by a mold. After pressing, the threaded teeth are completely embedded in the inner wall of the shell to ensure that the stud 2 is not loose and obtain good connection performance during use. Therefore, the tail end 111 is formed by reducing the diameter at the end of the rivet stud shell 1, which can facilitate the operator to introduce it into the opening of the mold, thereby improving installation efficiency and reducing production costs during installation.

[0114] In this embodiment, the rivet stud housing 1 also takes into account the effect of more uniform and dispersed force on the contact surface of the upper surface of the workpiece after riveting. The head flange 14 is designed with a large diameter. The upper and lower surfaces of the head flange 14 are parallel. The lower flange surface of the head flange 14 does not adopt flower teeth or special shape design, and the lower flange surface is a smooth plane design. In addition, the upper flange surface of the head flange 14 can also be used to add a logo or identification design for the purpose of anti-counterfeiting or anti-error.

[0115] like Figure 3 As shown, the stud 2 matched with the rivet stud shell 1 is provided with a stud rod 21, a stud connecting rod 22 and a stud lower flange 23 in sequence along the axial direction, and a guide tooth 26 is provided at one end of the stud rod 21 away from the stud lower flange 23; wherein, an external thread 24 is provided on the outer circumference of the stud rod 21, and the external thread 24 can be a metric or imperial thread or other special thread design, the pitch can be coarse or fine, and the thread tolerance zone can be designed to be az accuracy; a knurling 25 is also provided on the external thread of the stud connecting rod 22, and the knurling design is adopted. The knurling can increase the friction of the stud 2, making it easier to lock with the matched rivet stud shell 1, thereby improving the locking force of the stud 2, and obtaining good mechanical properties after assembly, thereby enhancing the anti-loosening ability of the bolt.

[0116] On this basis, the outer diameter of the stud lower flange 23 is set larger than the inner diameter of the cavity 3, and the transition area between the two adopts a chamfered corner 27 structure to achieve free transition. In use, since the outer diameter of the stud lower flange 23 is larger than the outer diameter of the stud connecting rod 22, the stud lower flange 23 is used to connect with the bottom of the rivet stud shell 1, and the chamfered corner 27 is used for transition between the stud connecting rod 22 and the stud lower flange 23, which optimizes stress distribution, reduces the risk of cracks, and can improve load bearing and fatigue life, thereby ensuring the quality and reliability of the connection.

[0117] The upper and lower surfaces of the stud lower flange 23 are designed to be parallel, the upper flange plane is a smooth design, and the thread direction remains perpendicular to the flange plane; the bottom middle area of ​​the stud lower flange 23 can be smooth, or it can be designed with a conical surface or other special shapes; after installation, the lower surface of the rivet stud shell 1 is tightly fitted with the upper surface of the stud lower flange 23, and the two can be connected together by crimping or welding, which is conducive to maintaining good concentricity and verticality between the stud and the shell.

[0118] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A hexagonal rivet used on a non-metallic sheet workpiece, characterized in that: It comprises a rivet stud housing (1) and a stud (2) sleeved in the rivet stud housing (1); The rivet stud housing (1) comprises: The upper part of the housing (11); A lower shell section (12), the lower shell section (12) being integrally arranged at the bottom of the upper shell section (11), the outer diameter of the lower shell section (12) being smaller than the outer diameter of the upper shell section (11), and a step structure (13) being formed between the two; A head flange (14), wherein the head flange (14) is integrally arranged on the top of the upper section (11) of the shell body and is horizontally oriented outward to form a structure with horizontal upper and lower surfaces; The outer peripheral surfaces of the upper shell section (11) and the lower shell section (12) are hexagonal surfaces and are arranged perpendicular to the head flange (14); A cavity (3) passing through the stud (2) is formed at the center of the lower section (12) of the shell, and a multiple deformation unit is arranged inside the cavity.

2. The hexagonal rivet used on a non-metallic sheet workpiece according to claim 1, characterized in that: The step structure (13) arranged between the upper shell section (11) and the lower shell section (12) adopts chamfer transition.

3. The hexagonal rivet used on a non-metallic sheet workpiece according to claim 2, characterized in that: After the rivet stud housing (1) is deformed by clamping the plate, the lower end of the step structure (13) forms a support point (15).

4. The hexagonal rivet used on a non-metallic sheet workpiece according to claim 3, characterized in that: The lower shell section (12) is reduced inwardly by 0.1-0.3 mm on one side compared to the upper shell section (11).

5. The hexagonal rivet used on a non-metallic sheet workpiece according to claim 4, characterized in that: The multiple deformation unit comprises: A primary riveting deformation zone (16), wherein the top of the primary riveting deformation zone (16) is located below the step structure (13); A secondary riveting deformation zone (17), wherein the secondary riveting deformation zone (17) is coaxially arranged below the primary riveting deformation zone (16), and the inner diameter of the secondary riveting deformation zone (17) is smaller than the inner diameter of the primary riveting deformation zone (16); A primary transition zone (18) is provided between the primary riveting deformation zone (16) and the secondary riveting deformation zone (17).

6. The hexagonal rivet used on a non-metallic sheet workpiece according to claim 5, characterized in that: A stud connection area (19) is also integrally provided in the cavity (3) below the multiple deformation unit, and the inner wall of the stud connection area (19) has a light hole structure, a threaded structure or a toothed structure.

7. The hexagonal rivet used on a non-metallic sheet workpiece according to claim 6, characterized in that: A tail end (111) is integrally extended from one end of the bottom of the rivet stud housing (1) away from the head flange (14), and the tail end (111) has a chamfered structure.

8. The hexagonal rivet used on a non-metallic sheet workpiece according to claim 7, characterized in that: The stud (2) is provided with a stud rod (21), a stud connecting rod (22) and a stud lower flange (23) in sequence along the axial direction; The outer circumference of the stud rod (21) is provided with an external thread (24); The external thread of the stud connecting rod (22) is also provided with knurling (25); The outer diameter of the stud lower flange (23) is set larger than the inner diameter of the cavity (3).

9. The hexagonal rivet used on a non-metallic sheet workpiece according to claim 8, characterized in that: The transition area between the stud connecting rod (22) and the stud lower flange (23) adopts a rounded corner (27) structure.

10. The hexagonal rivet used on a non-metallic sheet workpiece according to claim 9, characterized in that: After installation, the lower surface of the rivet stud housing (1) is tightly fitted to the upper surface of the stud lower flange (23).

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