Riveted fastener, fastening connection, connection mechanism and mounting mechanism based on flexible deformation of shank portion to adapt to plate thickness

Abstract

This invention provides a riveting fastener, fastening connector, connection mechanism, and installation mechanism based on the flexible deformation of the shank to adapt to different plate thicknesses. The riveting fastener includes a shank, a reinforcing portion, a flange portion, and a rod portion arranged axially in sequence. The shank has a through hole and a deformable unit that can shorten axially, preferably a spiral structure. During riveting, the shank deforms under pressure, shortening and expanding radially, making the top of the shank flush with the surface of the connected plate. Simultaneously, the plate material flows into the tooth gaps and grooves of the deformable unit, forming a strong connection. The connection mechanism formed by this fastener provides stable rigid support for injection-molded parts with bushings, preventing bushing detachment and ensuring no loss of connection torque. This invention achieves a smooth surface after riveting, high connection strength, and reliable support by using a flexible shank to adapt to different plate thicknesses, making it particularly suitable for scenarios requiring high-reliability connections in the automotive and electronics industries.

Description

Technical Field

[0001] This application belongs to the technical field of mechanical equipment, and in particular relates to a riveting fastener, fastening connector, connection mechanism and installation mechanism based on the flexible deformation of the handle to adapt to the plate thickness. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this invention and does not constitute prior art.

[0003] Riveting fasteners are widely used in the automotive, electronics, and aerospace industries to create reliable internal threaded connections on thin or sheet metal. Existing press-fit nuts have fixed shank lengths after manufacturing, making it difficult to achieve flush alignment with the sheet metal after press-fitting. During fastening, the shank is recessed into the sheet metal, easily leading to gaps and unsupported bearing surfaces, affecting the rigidity of the connection. Due to manufacturing tolerances in sheet metal thickness and the fixed shank length, the top of the shank often rises above or falls below the sheet metal surface after press-fitting, creating a step difference. This not only affects appearance but also interferes with the installation of subsequent components, leading to assembly difficulties or stress concentration. If the connected components are plastic structures with compression rings, the compression rings can easily detach from the plastic structure during bolt tightening, causing connection failure and resulting in loss or reduction of residual torque. Different sheet metal thicknesses require different fastener specifications, increasing parts management and inventory costs. Therefore, there is an urgent need for a new riveting fastening technology that can adapt to sheet metal thickness, achieve a flush surface after riveting, and provide reliable rigid support.

[0004] It should be noted that the above description of the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of the present invention and facilitating understanding by those skilled in the art. It should not be assumed that the above technical solutions are known to those skilled in the art simply because they have been described in the background section of this invention. Summary of the Invention

[0005] The purpose of this application is to provide a riveting fastener, fastening connector, connection mechanism and installation mechanism based on the flexible deformation of the handle to adapt to the thickness of the plate, so as to solve the technical problem in the prior art that the fastener and the plate surface are not flat after riveting, and the support of plastic parts with bushings is unreliable.

[0006] This application provides a riveting fastener based on the flexible deformation of the shank to adapt to the thickness of the plate, which can adapt to flat applications of plates of different thicknesses, including: The handle, reinforcing part, flange part and rod part are arranged in order from top to bottom; The handle has a through hole and a deformable unit that can shorten along its axial length. The deformable unit includes multiple teeth, and the gaps between adjacent teeth form a receiving space. The outer diameter of the reinforcing part is larger than the outer diameter of the handle part, and a groove is formed at the connection between the reinforcing part and the handle part; The outer diameter of the flange is larger than the outer diameter of the reinforcing part; The rod portion is provided with a threaded portion that communicates with a through hole in the handle portion.

[0007] Furthermore, in the aforementioned riveting fastener based on flexible deformation of the shank to adapt to the plate thickness, the deformation unit is a spiral curve structure or an array structure formed along the axial direction.

[0008] Furthermore, in the aforementioned riveting fastener based on flexible deformation of the handle to adapt to the plate thickness, the deformation unit is disposed on the outer wall of the handle.

[0009] Furthermore, in the aforementioned riveting fastener based on flexible deformation of the handle to adapt to the plate thickness, the deformation unit is disposed on the inner wall of the handle.

[0010] Furthermore, in the aforementioned riveting fastener based on flexible deformation of the shank to adapt to the plate thickness, the deformation unit is disposed on the inner and outer walls of the shank.

[0011] Furthermore, in the aforementioned riveting fastener based on the flexible deformation of the handle to adapt to the plate thickness, the reinforcing part can be directly connected to the handle.

[0012] This application also provides a riveting fastener, comprising: Such as the riveting fasteners mentioned above; A connecting plate is provided, which has a pre-drilled mounting hole and is fitted onto the outer wall of the handle through the mounting hole. The connecting plate is installed above the reinforcing part. In the initial state, the top of the handle protrudes from the upper surface of the connecting plate. An axial force is applied downward to the top of the handle. During the deformation process of the deformation unit of the handle, the distance between adjacent teeth decreases, the axial length of the handle decreases, and the outer diameter of the handle increases. The compressed material of the connecting plate flows smoothly along the deformation unit into the receiving space between adjacent teeth and the receiving groove. The bottom of the connecting plate abuts against the flange, and the mounting hole of the connecting plate abuts against the outer wall of the handle, until the top of the handle is deformed to be on the same horizontal plane as the upper surface of the connecting plate, so that the handle is flush with the connecting plate.

[0013] This application also provides a connection mechanism, which includes the riveting fastening connector, the second connector, the connecting washer, and the bolt as described above; The connecting plate is riveted to the fastener, and the top of the handle is flush with the upper surface of the connecting plate. The second connector is placed above the connecting plate, and the second connector has a connection hole that communicates with the mounting hole of the connecting plate; The bolt passes sequentially through the connecting washer, the second connector, the through hole, and the threaded portion of the fastener.

[0014] Furthermore, in the aforementioned connecting mechanism, the second connecting member is an injection-molded part with an internally wrapped bushing, and the handle supports the bottom of the bushing.

[0015] This application also provides an installation mechanism for combining the above-mentioned riveting fasteners with connecting plates, including an upper jig and a lower jig. The lower fixture is provided with a groove to accommodate the rod and the flange, and the upper surface of the lower fixture is on the same horizontal plane as the flange. The upper fixture has a pressing part extending from the lower surface, and the outer diameter of the pressing part is smaller than the inner diameter of the through hole of the handle. The outer wall of the pressing part is fitted into the through hole of the handle. The upper fixture rivets the deformation unit of the handle from top to bottom, so that the deformation unit of the handle is deformed by force, the distance between adjacent teeth becomes smaller, the axial length of the handle becomes smaller, the outer diameter of the handle becomes larger, the bottom of the connecting plate abuts against the flange, and part of the material of the connecting plate is deformed and flows into the receiving space between adjacent teeth and the receiving groove. The mounting hole of the connecting plate abuts against the outer wall of the handle until the top of the handle is deformed to be on the same horizontal plane as the upper surface of the connecting plate.

[0016] As can be seen from the above technical solution, the present invention has the following beneficial effects: The riveting fastener based on flexible deformation of the shank to adapt to the thickness of the plate, as described in this invention, has a flexible shank with continuously compressible deformation units. The fastener can adaptively adjust the shank length according to the actual thickness of the connected plates. The spiral curve unfolds continuously along the axial direction, so that during the riveting compression process, no matter at which height position the actual thickness of the connected plates is within the tolerance range, the spiral teeth can provide a continuous and uninterrupted receiving space and guiding channel at that height position. This allows the compressed plate material to flow smoothly and continuously into the tooth gap of the deformation unit and the groove below along the spiral curve. After riveting, the top of the shank is always flush with the surface of the plate, eliminating step differences and improving the flatness and aesthetics of the installation. The flush surface between the fastener and the connecting plate provides a complete and rigid support plane for the subsequent installation of the second connector. When tightening the bolts, the bottom of the bushing is effectively supported, preventing the bushing from falling off due to suspension, fundamentally solving the problem of residual torque loss, and significantly improving the reliability and durability of the connection; During the compression deformation of the shank, its outer diameter expands radially, forming an interference fit with the plate mounting hole. At the same time, the plate material is squeezed into the deformation unit and the groove, forming a mechanical interlock. This dual action greatly improves the fastener's resistance to extrusion and torsional moment. The deformation unit can be designed as a spiral or array shape, and can be set on the inner wall, outer wall or both sides of the handle. It can be optimized according to the strength and deformation requirements of different application scenarios, and has a wide range of applications. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 and Figure 2 This is a schematic diagram of a riveting fastener based on flexible deformation of the shank to adapt to the plate thickness, provided in Embodiment 1 of this application; Figure 3 This is a schematic diagram of a riveting fastener based on flexible deformation of the shank to adapt to the plate thickness, provided in Embodiment 1a of this application. Figure 4 This is a schematic diagram of a riveting fastener based on flexible deformation of the shank to adapt to the plate thickness, provided in Embodiment 1b of this application. Figure 5 This is a schematic diagram of a riveting fastener based on flexible deformation of the shank to adapt to the plate thickness, provided in Embodiment 1c of this application. Figure 6 This is a schematic diagram of a riveting fastener based on flexible deformation of the shank to adapt to the plate thickness, provided in Embodiment 1d of this application. Figure 7 This is a schematic diagram of a riveting fastener based on flexible deformation of the shank to adapt to the plate thickness, provided in Embodiment 1e of this application; Figure 8 This is a schematic diagram of the fastening connector provided in Embodiment 2 of this application; Figure 9 This is a schematic diagram of the structure of the fastening connector provided in Embodiment 2 of this application before riveting; Figure 10 This is a schematic diagram of the riveted structure of the fastening connector provided in Embodiment 2 of this application; Figure 11 This is a schematic diagram of the connecting mechanism provided in Embodiment 3 of this application; Figure 12 This is a schematic diagram of the installation mechanism provided in Embodiment 4 of this application.

[0019] In the picture: 100. Fastener; 110. Shank; 111. Through hole; 112. Deformation unit; 113. Tooth; 120. Reinforcing part; 121. Groove; 130. Flange; 140. Rod; 141. Threaded part; 200. Connecting plates; 300. Second connector; 310. Connecting hole; 311. Bushing; 320. Connecting gasket; 330. Bolt; 400. Upper jig; 410. Pressing part; 500. Lower the jig. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0021] In the description of this invention, it should be noted that the terms "upper," "middle," "lower," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or component 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 the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0022] Example 1 Reference Figures 1 to 7 This application provides a riveting fastener 100 based on the deformation of the shank 110, which can adapt to flat applications of plates of different thicknesses. The fastener 100 is a one-piece molded structure, preferably made of metal materials such as steel, stainless steel, or aluminum alloy to ensure sufficient structural strength and riveting flexibility. The fastener 100 specifically includes: The handle 110, the reinforcing part 120, the flange part 130 and the rod 140 are arranged coaxially from top to bottom; The handle 110 has a through hole 111 inside, and the handle 110 has a deformable unit 112 that can shorten along its axial length. The deformable unit 112 includes a plurality of teeth 113. The handle 110 has a hollow cylindrical structure, and its interior has a through hole 111 along the axial direction. The handle 110 is the core component for realizing the adaptive plate thickness function of this application, and it has a deformable unit 112 that can shorten along its axial length. In this embodiment, the deformation unit 112 is a spiral structure disposed on the outer wall of the handle 110. This spiral structure allows the handle 110 to undergo controllable compression deformation when subjected to axial pressure. The spacing between adjacent spiral teeth 113 will decrease uniformly, thereby shortening the overall axial length of the handle 110 and increasing its outer diameter accordingly. The spiral structure is essentially a spiral curve tooth 113 that extends continuously along the axial direction of the handle 110. Its core advantage is that the spiral curve unfolds continuously along the axial direction, so that during the riveting compression process, regardless of the actual thickness of the connecting plate 200 within the tolerance range, the spiral tooth 113 can provide a continuous and uninterrupted receiving space and guiding channel at that height position. This allows the compressed plate material to flow smoothly and continuously into the tooth gap of the deformation unit 112 and the receiving groove 121 below along the spiral curve. This design ensures that the handle can be flexibly and continuously deformed, and uniform and sufficient material filling can be achieved in the entire thickness direction of the plate, thereby significantly improving the density of the connection.

[0023] The outer diameter of the reinforcing part 120 is larger than the outer diameter of the handle 110, and a receiving groove 121 is formed at the connection between the reinforcing part 120 and the handle 110. The reinforcing part 120 is located below the handle 110, and its outer diameter is significantly larger than that of the handle 110. An annular receiving groove 121 is formed at the connection between the reinforcing part 120 and the handle 110. The receiving groove 121 is used to accommodate the material that is squeezed and deformed by the connecting plate 200 during the riveting process, thereby enhancing the bonding force and resistance to rotational torque between the connecting plate 200 and the fastener 100. In this embodiment, the reinforcing part 120 can be designed as a toothed structure.

[0024] The outer diameter of the flange 130 is larger than the outer diameter of the reinforcing part 120; the flange 130 is located below the reinforcing part 120, and its outer diameter is larger than that of the reinforcing part 120. The lower surface of the flange 130 is a plane, which is used to abut against the lower jig 500 of the installation mechanism during the riveting process to provide stable support. Its upper surface is in close contact with the ground of the connecting plate 200 after the riveting is completed, which plays the role of axial limiting. The rod portion 140 is provided with a threaded portion 141 that communicates with the through hole 111 in the handle portion 110. The threaded portion 141 and the through hole 111 in the handle portion 110 are connected to form a central channel of the entire fastener 100, which is used for subsequent threaded connection with the bolt 330.

[0025] Modified embodiments The technical solution of this application is not limited to the above structure. The design position and form of the deformable unit 112 can be adjusted according to the actual application scenario. Example 1a like Figure 3 As shown, the deformation unit 112 is disposed on the inner wall of the handle 110. In this structure, the outer wall of the handle 110 remains smooth, which is suitable for scenarios where there are higher requirements for the surface smoothness of the fastener 100 after installation, or where it is necessary to avoid excessive stress concentration between the outer wall teeth 113 and the connecting plate 200. Its deformation principle is the same as that of Embodiment 1. Under axial pressure, the spiral or array teeth 113 on the inner wall of the handle 110 undergoes compression deformation, thereby shortening the length of the handle 110.

[0026] Example 1b like Figure 4 As shown, the deformation unit 112 is simultaneously disposed on both the inner and outer walls of the handle 110. This double-sided structure provides a larger deformation space and deformation amount, enabling it to adapt to a wider range of sheet thicknesses. The spiral curve design of the outer wall forms a continuous flow channel, allowing the sheet material to be continuously received and guided along the gaps between adjacent teeth on the outer wall during compression, resulting in more complete and balanced material flow. During compression, the teeth 113 on the inner and outer walls deform collaboratively, more effectively converting axial force into radial expansion force, making the handle 110 fit more tightly against the mounting hole wall of the connecting sheet 200.

[0027] Example 1c like Figure 5 As shown, the deformation unit 112 consists of multiple independent annular teeth 113 arrayed along the axial direction of the shank 110. Compared with the spiral structure, this structure has more distinct stages during compression, with each tooth 113 deforming sequentially. The gaps between adjacent teeth provide guiding and receiving space for the sheet material, allowing the sheet material to flow into the gaps between adjacent teeth to achieve riveting between the fastener and the connecting sheet material. This makes the force-displacement curve of the riveting process smoother and more controllable, facilitating precise control through press-fitting equipment.

[0028] Example 1d like Figure 6 As shown, the principle of this application also applies to through-hole nuts, that is, the shank 140 and the flange 130 are combined into one, with the same outer diameter and a through hole 111 inside. The deformable shank 110 structure can also be set on its inner wall and / or outer wall, and the deformation unit 112 can also be set as a spiral structure or an array structure.

[0029] Example 1e like Figure 7As shown, the reinforcing part 120 of this application can be directly connected to the handle 110 without a specially provided receiving groove 121 structure. During the installation of the fastener 100 and the connecting plate 200, the teeth 113 on the outer wall of the handle 110 can be pressed and connected with the connecting plate 200, and the fastener 100 and the connecting plate 200 can also be riveted.

[0030] Example 2 Reference Figure 8 This embodiment also provides a riveting fastening connector, including: The riveting fastener 100 described in Example 1; A connecting plate 200 is provided, which has a pre-set mounting hole and is fitted onto the outer wall of the handle 110 through the mounting hole. The connecting plate 200 is installed above the reinforcing part 120. In the initial state, the top of the handle 110 protrudes from the upper surface of the connecting plate 200. An axial force is applied downwards to the top of the handle 110. During the deformation process of the deformation unit 112 of the handle 110, the distance between adjacent teeth 113 decreases, the axial length of the handle 110 decreases, and the outer diameter of the handle 110 increases. The bottom of the connecting plate 200 abuts against the flange 130. A portion of the material compressed from the connecting plate 200 flows smoothly along the deformation unit 112 into the accommodating space between adjacent teeth 113 and into the accommodating groove 121. The mounting hole of the connecting plate 200 abuts against the outer wall of the handle 110 until the top of the handle 110 deforms to be on the same horizontal plane as the upper surface of the connecting plate 200, thus achieving flush alignment between the handle 110 and the connecting plate 200.

[0031] like Figure 9 As shown, in the initial riveting state, the connecting plate 200 is fitted onto the outer wall of the shank 110 of the fastener 100 through the mounting hole, with its bottom surface positioned above the reinforcing part 120. At this time, the top of the shank 110 clearly protrudes from the upper surface of the connecting plate 200. Subsequently, the mounting mechanism is used to perform a riveting operation on the above assembly. Specifically, as... Figure 12As shown, the assembled fastener 100 and connecting plate 200 are placed on the lower fixture 500 of the mounting mechanism. The groove of the lower fixture 500 accommodates the rod portion 140 and the flange portion 130 and supports the flange portion 130. The pressing portion 410 of the upper fixture 400 is inserted into the through hole 111 of the handle portion 110 and applies an axial force to the top of the handle portion 110 from top to bottom. Under this force, the deformation unit 112 on the handle portion 110 begins to be compressed and deformed. Taking a spiral structure as an example, the spacing between adjacent spiral teeth 113 gradually decreases, and the axial force of the handle portion 110... As the length shortens, the width of the spiral groove between the teeth 113 narrows. Since the spiral groove is continuous along the axial direction of the handle 110, the material extruded from the connecting plate 200 of different thicknesses can find a continuous receiving inlet at any height corresponding to that thickness, and flow smoothly along the spiral curve into the spiral groove between adjacent teeth and the receiving groove 121. At the same time, since the material volume remains constant, the outer radial direction of the handle 110 expands outward, forming an interference fit with the inner wall of the mounting hole of the connecting plate 200, generating a huge frictional force. During the press-fitting process, the bottom of the connecting plate 200 is pressed downward until it abuts against the upper surface of the flange 130; at the same time, part of the material of the connecting plate 200 located at the edge of the mounting hole flows and fills the spiral groove between adjacent teeth and the receiving groove 121 formed between the reinforcing part 120 and the handle 110 under the compression of the outer wall of the handle 110 and its own deformation. This process further enhances the torsional and ejection resistance between the fastener 100 and the plate. Ultimately, as Figure 10 As shown, the riveting process ends when the top of the shank 110 is completely flattened to be on the same horizontal plane as the upper surface of the connecting plate 200. At this point, the fastener 100 and the connecting plate 200 form a flat, stepless integrated structure. By adapting to different plate thicknesses, the flexible shank achieves flush alignment between the shank 110 and the plate. This design makes the riveting process highly tolerant to tolerances of different plate thicknesses, truly realizing the function of continuously accepting material inflow with "adaptive to different plate thicknesses".

[0032] The technical effects of this embodiment are as follows: First, the compression deformation of the shank 110 perfectly solves the problem of uneven surface after installation caused by the thickness tolerance of the sheet metal or the manufacturing error of the shank 110 in traditional press-fit fasteners 100. In particular, the design of the spiral deformation unit 112, which forms a continuous spiral curve along the axial direction, can provide a continuous and smooth receiving channel and flow path for the compressed sheet material at any height position within the entire thickness range of the sheet metal, ensuring that the sheet material can uniformly and fully fill all tooth gaps, avoiding defects such as stress concentration or incomplete filling caused by interruption of material flow or local accumulation. Second, the radial expansion and material flow generated during the deformation of the shank 110 form a dual connection of mechanical interlocking and interference fit between the fastener 100 and the connecting sheet metal 200, greatly improving the reliability of the connection. Finally, the flush surface provides a flat and stable reference surface for subsequent installation of other parts on this surface, avoiding assembly difficulties and stress concentration caused by protrusions or depressions.

[0033] Example 3 Please continue reading. Figure 11 This embodiment also provides a connecting mechanism, which includes a riveting fastening connector, a second connector 300, a connecting washer 320 and a bolt 330 as described in Embodiment 2; The connecting plate 200 is riveted to the fastener 100, and the top of the handle 110 is flush with the upper surface of the connecting plate 200. The second connector 300 is placed above the connecting plate 200, and the second connector 300 is provided with a connecting hole 310 that communicates with the mounting hole of the connecting plate 200; The bolt 330 passes sequentially through the connecting washer 320, the second connector 300, and the through hole 111 to connect with the threaded portion 141 of the fastener 100.

[0034] In this embodiment, the connecting plate 200 and the fastener 100 have been riveted together, and the top of the shank 110 of the fastener 100 is completely flush with the upper surface of the connecting plate 200. The second connector 300 is placed above the connecting plate 200. The second connector 300 has a pre-set connecting hole 310 that corresponds to and is connected to the mounting hole of the connecting plate 200. The bolt 330 passes through the connecting washer 320, the connecting hole 310 of the second connector 300, and then through the through hole 111 of the fastener 100, and finally is threadedly connected and locked to the threaded part 141 in the rod 140.

[0035] Preferably, the second connector 300 is an injection-molded part that internally encloses the bushing 311. After the connection mechanism is assembled, the top of the handle 110 of the fastener 100 (which is flush with the connecting plate 200) can just abut against and support the bottom end face of the bushing 311.

[0036] Because the shank 110 of the fastener 100 is flush with the connecting plate 200, when the bolt 330 is tightened, the second connector 300, especially its internal bushing 311, can form a stable contact with a complete, rigid plane (i.e., the plane formed by the top of the flush shank 110 and the surface of the connecting plate 200). This avoids the problem of the bushing 311 being suspended and unevenly stressed due to the recess of the fastener 100 in the traditional structure. Under the axial tightening force applied by the bolt 330, the second connector 300 is uniformly compressed, and its internal bushing 311 will not come out of the injection molded part due to excessive local stress. This fundamentally solves the disadvantage in the prior art that the compression limiting ring is prone to falling off the plastic structure when the bolt 330 is tightened, causing the loss or absence of residual torque in the entire connection, thus ensuring the torque holding capability and connection reliability of the connection mechanism.

[0037] Example 4 Reference Figure 12 This embodiment also provides an installation mechanism for combining the riveting fastener 100 described in Embodiment 1 with the connecting plate 200, including an upper jig 400 and a lower jig 500. The lower fixture 500 is provided with a groove to accommodate the rod portion 140 and the flange portion 130, and the upper surface of the lower fixture 500 and the flange portion 130 are on the same horizontal plane. The upper fixture 400 is provided with a pressing part 410 extending from its lower surface. The outer diameter of the pressing part 410 is smaller than the inner diameter of the through hole 111 of the handle 110, and the outer wall of the pressing part 410 fits into the through hole 111 of the handle 110. The upper fixture 400 rivets the deformation unit 112 of the handle 110 from top to bottom, so that the deformation unit 112 of the handle 110 is deformed by pressure, and the distance between adjacent teeth 113 becomes smaller. The axial length of the portion 110 decreases, the outer diameter of the handle portion 110 increases, the bottom of the connecting plate 200 abuts against the flange portion 130, part of the material of the connecting plate 200 is squeezed and deformed and flows into the receiving space between the adjacent teeth 113 and the receiving groove 121, the mounting hole of the connecting plate 200 abuts against the outer wall of the handle portion 110 until the top of the handle portion 110 is deformed to be on the same horizontal plane as the upper surface of the connecting plate 200.

[0038] The lower jig 500 has a groove on its main body. The shape and size of the groove are designed to accommodate the rod portion 140 and the flange portion 130 of the fastener 100. When the lower jig 500 is placed on a horizontal surface and the flange portion 130 of the fastener 100 is fully seated at the bottom of the groove, the upper surface of the lower jig 500 and the upper surface of the flange portion 130 are on the same horizontal surface. This design ensures that during the pressing process, the connecting plate 200 can be smoothly pressed into contact with the flange portion 130 without being interfered with by the lower jig 500.

[0039] A cylindrical pressing part 410 extends downward from the lower surface of the upper fixture 400. The outer diameter of the pressing part 410 is slightly smaller than the inner diameter of the through hole 111 of the handle 110 of the fastener 100 to ensure smooth insertion. At the same time, a very small gap is maintained between the outer wall of the pressing part 410 and the inner wall of the through hole 111 to achieve a close fit and guide, ensuring the perpendicularity and coaxiality of the pressing force.

[0040] During installation, the fastener 100 is first placed into the groove of the lower fixture 500, so that the flange 130 contacts the bottom of the groove. Then, the pre-drilled connecting plate 200 is fitted onto the handle 110, and the upper fixture 400 moves downward. The pressing part 410 first enters the through hole 111 of the handle 110, applying precise axial pressure to the top of the handle 110. Under the continuous action of pressure, the deformation unit 112 (such as a helical tooth) of the handle 110 begins to compress and deform, as described in Embodiment 2 above. Due to the close fit and guidance between the pressing part 410 of the upper fixture 400 and the inner wall of the through hole 111, and the rigid support of the lower fixture 500 on the flange 130, the entire deformation process is restricted to a strict axial direction, ensuring that the handle 110 expands outward uniformly and in a stacked manner. When the lower surface of the upper jig 400 contacts the upper surface of the connecting plate 200, it indicates that the handle 110 has been compressed to be flush with the connecting plate 200. At this time, the upper jig 400 stops pressing down.

[0041] This installation mechanism, through the precise cooperation of the upper and lower fixtures 500, provides a reliable means to realize the adaptive plate thickness characteristics of the riveting fastener 100. It ensures that the force, displacement and final shape of the riveting process are under control, guarantees the consistency and reliability of products in mass production, and is simple to operate, highly efficient, and suitable for integration into automated production lines.

[0042] Although different specific embodiments are mentioned in this application, this application is not limited to the situations described in industry standards or embodiments. Slightly modified implementations based on certain industry standards or custom methods or embodiments can also achieve the same, equivalent, or similar, or predictable, implementation effects as the above embodiments. Embodiments applying these modified or modified data acquisition, processing, output, and judgment methods still fall within the scope of optional implementations of this application.

[0043] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A riveting fastener based on flexible deformation of the shank to adapt to plate thickness, characterized in that, It can adapt to flat applications of plates of different thicknesses, including: a handle, a reinforcing part, a flange part and a rod part arranged from top to bottom; The handle has a through hole and a deformable unit that can shorten along its axial length. The deformable unit includes multiple teeth, and the gaps between adjacent teeth form a receiving space. The outer diameter of the reinforcing part is larger than the outer diameter of the handle part, and a groove is formed at the connection between the reinforcing part and the handle part; The outer diameter of the flange is larger than the outer diameter of the reinforcing part; The rod portion is provided with a threaded portion that communicates with a through hole in the handle portion.

2. The riveting fastener based on flexible deformation of the shank to adapt to plate thickness according to claim 1, characterized in that, The deformable unit is a spiral curve structure or an array structure formed along the axial direction.

3. The riveting fastener based on flexible deformation of the shank to adapt to plate thickness according to claim 1, characterized in that, The deformation unit is disposed on the outer wall of the handle.

4. The riveting fastener based on flexible deformation of the shank to adapt to plate thickness according to claim 1, characterized in that, The deformation unit is disposed on the inner wall of the handle.

5. The riveting fastener based on flexible deformation of the shank to adapt to plate thickness according to claim 1, characterized in that, The deformation unit is disposed on the inner wall and outer wall of the handle.

6. The riveting fastener based on flexible deformation of the shank to adapt to plate thickness according to claim 1, characterized in that, The reinforcing part can be directly connected to the handle.

7. A riveting fastener, characterized in that, include: The riveting fastener as described in any one of claims 1 to 6; A connecting plate is provided, which has a pre-drilled mounting hole and is fitted onto the outer wall of the handle through the mounting hole. The connecting plate is installed above the reinforcing part. In the initial state, the top of the handle protrudes from the upper surface of the connecting plate; An axial force is applied downwards to the top of the handle. During the deformation process of the deformation unit of the handle, the distance between adjacent teeth decreases, the axial length of the handle decreases, and the outer diameter of the handle increases. The material of the connecting plate that is squeezed flows smoothly along the deformation unit into the receiving space between adjacent teeth and the receiving groove. The bottom of the connecting plate abuts against the flange, and the mounting hole of the connecting plate abuts against the outer wall of the handle until the top of the handle is deformed to be on the same horizontal plane as the upper surface of the connecting plate, so as to achieve that the handle is flush with the connecting plate.

8. A connecting mechanism, characterized in that, The connecting mechanism includes the riveting fastening connector, the second connector, the connecting gasket, and the bolt as described in claim 7; The connecting plate is riveted to the fastener, and the top of the handle is flush with the upper surface of the connecting plate. The second connector is placed above the connecting plate, and the second connector has a connection hole that communicates with the mounting hole of the connecting plate; The bolt passes sequentially through the connecting washer, the second connector, the through hole, and the threaded portion of the fastener.

9. The connecting mechanism according to claim 8, characterized in that, The second connector is an injection-molded part with an internally wrapped bushing, and the handle supports the bottom of the bushing.

10. An installation mechanism for combining the riveting fastener according to any one of claims 1 to 6 with a connecting plate, characterized in that, Including upper fixture and lower fixture, The lower fixture is provided with a groove to accommodate the rod and the flange, and the upper surface of the lower fixture is on the same horizontal plane as the flange. The upper fixture has a pressing part extending from the lower surface, and the outer diameter of the pressing part is smaller than the inner diameter of the through hole of the handle. The outer wall of the pressing part is fitted into the through hole of the handle. The upper fixture rivets the deformation unit of the handle from top to bottom, so that the deformation unit of the handle is deformed by force, the distance between adjacent teeth becomes smaller, the axial length of the handle becomes smaller, the outer diameter of the handle becomes larger, the bottom of the connecting plate abuts against the flange, and part of the material of the connecting plate is deformed and flows into the receiving space between adjacent teeth and the receiving groove. The mounting hole of the connecting plate abuts against the outer wall of the handle until the top of the handle is deformed to be on the same horizontal plane as the upper surface of the connecting plate.

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