Flanged nut and flanging nut riveting device
By designing flanged nuts of various diameters and a cylinder-driven riveting device, the problems of prolonged nut placement and insufficient connection strength in injection molding were solved, achieving efficient riveting and stable connection between nuts and plastic products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-03-17
AI Technical Summary
In the existing technology, plastic products require an additional step of installing nuts during injection molding, which leads to a longer injection molding cycle, insufficient connection strength, and the problem that nuts are prone to falling off.
Design a flanged nut, which adopts a cylindrical structure with multiple diameters. The first layer is pressed and then flanged to be riveted to the plastic product. Combined with a cylinder-driven flanged nut riveting device, the nut is flanged and riveted using a punch.
This achieves a high-strength connection between the nut and the plastic product, shortens production time, improves the stability and strength of the connection, and prevents the nut from falling off.
Smart Images
Figure CN224003034U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of mechanical parts assembly equipment, specifically relating to a flanged nut and a flanged nut riveting device. Background Technology
[0002] In the design of housings for electrical equipment, automobiles, and other applications that require frequent disassembly, repair, or connection of external components, injection molding is often used to integrally mold copper nuts with plastic parts to meet the requirements of high-strength connection, durability, electrical / thermal conductivity, or to adapt to specific assembly process requirements.
[0003] When plastic products are injection molded and nut inserts are added for co-injection, there are two major problems: First, an additional step of placing the nut is required, which not only prolongs the injection molding cycle but may also cause quality fluctuations; second, if a subsequent hot-melt process is chosen, the H-shaped structure of the nut will result in insufficient connection strength between it and the injection molded product, making it easy for the nut to fall off later when the screw is tightened with a large force. Utility Model Content
[0004] To solve the above problems, the present invention adopts the following technical solution:
[0005] In a first aspect, a flanged nut includes a cylindrical body having a three-layer structure with an outer diameter increasing sequentially from top to bottom, namely a first layer, a second layer, and a third layer, wherein the inner diameter of the first layer is larger than the inner diameter of the second layer, and the inner diameters of the second layer and the third layer are the same.
[0006] As a further embodiment of this utility model: the outer periphery of the second layer is provided with a vertical protrusion.
[0007] As a further embodiment of this utility model, the vertical boss is toothed.
[0008] As a further embodiment of this utility model, the edge of the third layer is provided with a rounded corner structure.
[0009] In a second aspect, a flanged nut riveting device includes a support base, a cylinder, a punch, and a flanged nut as described above. The support base fixes the cylinder, and the punch is connected to the lower side of the cylinder. When the cylinder extends and retracts downward, the punch contacts and presses the first layer of the flanged nut to connect the nut to the injection molded part.
[0010] The support base has a 7-shaped structure, including a horizontal end and a vertical end that are connected to each other; the cylinder is connected to the horizontal end.
[0011] As a further embodiment of this utility model, it also includes a positioning seat, wherein the bottom of the longitudinal end of the support seat is provided with a positioning seat, and the positioning seat is connected to the positioning seat.
[0012] As a further embodiment of this utility model: a limiting part is provided at the middle of the longitudinal end of the support base, and the punch passes through the limiting part and contacts the flange nut.
[0013] As a further embodiment of this utility model, a return spring is also included, which is located on the upper side of the limiting part and sleeved on the outer periphery of the punch.
[0014] As a further embodiment of this utility model, the surface of the transverse end of the support base and the surface of the longitudinal section are respectively provided with several grooves.
[0015] As a further embodiment of this utility model: the support base and the cylinder are detachably connected; the support base and the positioning base are detachably connected.
[0016] The beneficial effects of this utility model are:
[0017] A type of flanged nut has a cylindrical structure with multiple diameters. The first layer is pressed and then flanged to rivet plastic products, thereby ensuring the connection strength between the nut and the plastic products. A flanged nut riveting device uses a cylinder to drive a punch to perform flanged riveting operations on the first layer of the flanged nut, which can quickly complete the riveting work of the nut in multiple directions for larger plastic products. Attached Figure Description
[0018] Figure 1 This is a structural diagram of a flanged nut;
[0019] Figure 2 This is a schematic diagram of the structure of a flanged nut after riveting.
[0020] Figure 3 This is a cross-sectional view of the flanged nut structure. Figure 1 ;
[0021] Figure 4 This is a cross-sectional view of the flanged nut structure. Figure 2 ;
[0022] Figure 5 This is a cross-sectional view of the flanged nut structure after riveting;
[0023] Figure 6 This is a cross-sectional view of a conventional nut structure. Figure 1 ;
[0024] Figure 7 This is a cross-sectional view of a conventional nut structure. Figure 2 ;
[0025] Figure 8This is a cross-sectional view of a conventional nut structure after riveting;
[0026] Figure 9 This is a structural schematic diagram of a flanged nut riveting device;
[0027] Figure 10 This is a schematic diagram showing the position of a flanged nut riveting device before riveting.
[0028] Figure 11 This is a schematic diagram showing the position of a flanged nut riveting device after riveting.
[0029] Figure 12 This is a schematic diagram of the structure of a flanged nut before it is riveted to a plastic product;
[0030] Figure 13 This is a schematic diagram of the structure of a flanged nut after being riveted to a plastic product;
[0031] As shown in the figure:
[0032] 1-Flanged nut, 11-First layer, 12-Second layer, 121-Vertical boss, 13-Third layer, 131-Rounded corner structure;
[0033] 2-Support base, 21-Transverse end, 22-Longitudinal end, 23-Positioning base, 24-Limiting part, 25-Groove;
[0034] 3-Cylinder, 4-Punch, 5-Return spring, 6-Plastic product;
[0035] 7-Standard nut. Detailed Implementation
[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0037] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0039] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0040] like Figure 6-8 As shown, a standard nut, used for co-injection or hot-melt molding, has an H-shaped structure. When plastic products are co-injected using injection molding with nut inserts, an additional step of installing the nut is required. This not only prolongs the injection molding cycle but may also cause quality fluctuations. If a subsequent hot-melt process is chosen, the H-shaped structure of the nut may result in insufficient connection strength between it and the injection-molded product, making it prone to falling off later when the screw is tightened with high force.
[0041] Example 1
[0042] like Figure 1-5 As shown, a flanged nut 1 includes a cylindrical body with a three-layer structure in which the outer diameter increases sequentially from top to bottom. The layers are a first layer 11, a second layer 12, and a third layer 13. The inner diameter of the first layer 11 is larger than that of the second layer 12, and the inner diameters of the second layer 12 and the third layer 13 are the same.
[0043] Specifically, a flanged nut 1 has a cylindrical structure with multiple diameters. The first layer 11 is pressed and flanged. The first layer 11 and the third layer 13 rivet the plastic product 6 to the second layer 12, thereby ensuring the connection strength between the nut and the plastic product 6. The deformation of the first layer 11 completely fixes the flanged nut 1 in the axial direction. This fixing effect not only enhances the riveting strength of the flanged nut 1 but also improves its positioning accuracy. The inner diameter of the first layer 11 is larger than the inner diameter of the second layer 12, forming a stepped structure to achieve a limiting function. Therefore, when the riveting device reaches the bottom of the first layer 11, it stops moving downwards, thus preventing the riveting device from continuing to press down and damaging the flanged nut 1 or the plastic product 6. Furthermore, after the flanged nut 1 is riveted, the stepped position greatly increases the pull-out resistance of the screw to the plastic product 6 when tightening.
[0044] In this embodiment, a vertical boss 121 is provided on the outer periphery of the second layer 12. Specifically, the vertical boss 121 structure increases the wall thickness of the second layer 12. When the riveting device applies a downward force to the flange nut 1, the vertical boss 121 structure can play a supporting role, preventing the second layer 12 from being further deformed by pressure; at the same time, it prevents deformation or damage to the flange nut 1 or the plastic product 6 that it mates with due to local stress concentration. The hole in the plastic product 6 is designed as a gear hole, and correspondingly, the vertical boss 121 is designed as a tooth shape so that it mates with the toothed hole in the plastic product 6, thereby preventing the riveted flange nut 1 from rotating with the screw during subsequent assembly.
[0045] In this embodiment, the edge of the third layer 13 is provided with a rounded corner structure 131. Specifically, the rounded corner transition can effectively reduce stress concentration at the metal edge. When subjected to the pressure of the riveting device, the stress can be more evenly distributed throughout the structure, avoiding problems such as cracks and fractures caused by stress concentration at right-angled edges, thereby improving the overall structural strength and service life of the flange nut 1. In addition, when the flange nut 1 is subjected to external impact, the rounded corner edge can more evenly disperse the impact force compared to the right-angled edge, reducing local stress concentration and thus reducing the degree of injury to personnel or surrounding objects.
[0046] Example 2
[0047] like Figure 9-13 As shown, a flanged nut riveting device includes a support base 2, a cylinder 3, a punch 4, and a flanged nut 1 (any one of the above). The support base 2 fixes the cylinder 3, and the punch 4 is connected to the lower side of the cylinder 3. When the cylinder 3 extends or retracts downward, the punch 4 contacts and presses the first layer 11 of the flanged nut 1, connecting the nut to the injection molded part. The support base 2 has a 7-shaped structure, including a transverse end 21 and a longitudinal end 22 that are connected to each other; the cylinder 3 is connected to the transverse end 21.
[0048] Specifically, a flanged nut riveting device uses a cylinder 3 to drive a punch 4 to perform flanged riveting on the first layer 11 of the flanged nut 1. This device uses the cylinder 3 to apply force, is small in size, lightweight, and offers more flexible movement. It can quickly complete the riveting of nuts in multiple directions for larger plastic products 6.
[0049] A flanged nut riveting device can perform operations flexibly and quickly by using this pneumatic riveting tool. Compared with the production method of placing the nut during injection molding, it can save production time and maintain stable quality. Compared with the additional nut hot-melt process after injection molding, it can effectively improve the riveting strength between the nut and the plastic product.
[0050] In this embodiment, a positioning seat 23 is also included. The bottom of the longitudinal end 22 of the support base 2 is provided with a positioning seat 23, and the positioning seat 23 is connected to the support base 2. Specifically, the flanged nut 1 is placed in the slot of the positioning seat 23, the plastic product 6 is inserted into the positioning seat 23, and the punch 4 moves downward to rivet the flanged nut 1 onto the plastic product 6. The positioning seat 23 has a precise positioning function, which greatly improves the installation efficiency and provides a strong guarantee for the efficient assembly and stable operation of the product.
[0051] In this embodiment, a limiting part 24 is provided in the middle of the longitudinal end 22 of the support base 2, and the punch 4 passes through the limiting part 24 to contact the flange nut 1. Specifically, when the punch 4 is pressed down, it passes through the limiting part 24. The limiting part 24 can not only control the distance of the punch 4 pressing down, but also provide guidance for the punch 4 to move vertically downward.
[0052] In this embodiment, a return spring 5 is also included. The return spring 5 is located on the upper side of the limiting part 24 and is sleeved on the outer periphery of the punch 4. Specifically, the return spring 5 realizes the component return function through deformation energy storage and automatic recovery. When the cylinder 3 extends and acts on the return spring 5, the return spring 5 deforms and stores elastic energy; when the cylinder 3 retracts, the spring relies on the elasticity of the internal spiral coil to quickly restore the cylinder 3 and the punch 4 to their original state.
[0053] In this embodiment, the surface of the transverse end 21 and the surface of the longitudinal section of the support base 2 are respectively provided with a plurality of grooves 25. The grooves 25 are provided to facilitate hand gripping or carrying of the flange nut riveting device, and also reduce the weight of the flange nut riveting device.
[0054] In this embodiment, the support base 2 and the cylinder 3 are detachably connected; the support base 2 and the positioning base 23 are detachably connected. Specifically, different sizes of cylinders 3 are provided according to the size of the flanged nut 1. Different positioning positions are provided according to different sizes of flanged nuts 1 or different specifications of plastic products 6.
[0055] like Figure 10-13 As shown, the method of using the flanged nut riveting device is as follows:
[0056] Place the flanged nut 1 into the slot of the positioning seat 23;
[0057] The moving device aligns the flanged nut 1 with the holes in the plastic product 6 that require riveting.
[0058] Turn on the switch for cylinder 3, and cylinder 3 will drive punch 4 to move downwards;
[0059] Punch 4 flips the first layer 11 of the flange nut 1 and presses it onto the edge of the plastic product 6 to achieve riveting;
[0060] Cylinder 3 resets, the moving device proceeds to the next hole riveting.
[0061] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A flanged nut, characterized in that The application relates to a cylindrical body, which is provided with a three-layer structure with increasing outer diameters from top to bottom, i.e. a first layer, a second layer and a third layer; the inner diameter of the first layer is larger than that of the second layer, and the inner diameters of the second layer and the third layer are the same.
2. The flanged nut according to claim 1, wherein The outer periphery of the second layer is provided with vertical bosses.
3. The flanged nut according to claim 2, wherein The vertical bosses are in the shape of teeth.
4. The flanged nut according to any one of claims 1-3, characterized in that The edge part of the third layer is provided with a round corner structure.
5. A swage device for swaging a flanged nut, the swage device comprising: The application relates to a support seat, a cylinder, a punch and a flanged nut, wherein the support seat is used for fixing the cylinder, the punch is connected to the lower side of the cylinder, the cylinder is telescoped downwards, the punch contacts and presses the first layer of the flanged nut, and the flanged nut is connected to an injection-molded part. The support seat is in the shape of a Chinese character '7', and comprises a transverse end and a longitudinal end which are connected to each other; the cylinder is connected to the transverse end.
6. The swage nut setting device of claim 5, wherein, The application further relates to a positioning seat, the bottom of the longitudinal end of the support seat is provided with the positioning seat, and the positioning seat is connected to the positioning seat.
7. The swage nut setting device of claim 5 wherein, The middle part of the longitudinal end of the support seat is provided with a limiting part, the punch passes through the limiting part and contacts the flanged nut.
8. The swage nut setting device of claim 7, wherein, The application further relates to a reset spring, which is located on the upper side of the limiting part and is sleeved on the outer periphery of the punch.
9. The swage nut setting device of claim 5 wherein, The surface of the transverse end and the surface of the longitudinal end of the support seat are respectively provided with a plurality of grooves.
10. The swage nut setting device of claim 6, wherein, The support seat and the cylinder are detachably connected; and the support seat and the positioning seat are detachably connected.