Multi-layer board riveting fastener, multi-layer board assembly and multi-layer board assembly to be installed

Abstract

The utility model relates to a fastener, in particular to a multilayer board riveting fastener which comprises a flange portion, a step portion, a spline tooth portion and a guide portion which are sequentially arranged in the axial direction. The diameter of the flange part is larger than that of the step part and that of the spline tooth part. The guide part is turned outwards in the axial direction from the joint of the guide part and the spline tooth part to the other end of the guide part, the diameter of the guide part at the joint of the guide part and the spline tooth part is smaller than that of the spline tooth part, and the diameter of the other end of the guide part is also smaller than that of the spline tooth part; wherein the diameter of the first hole is between the diameter of the other end of the guide part and the diameter of the spline part, and the diameter of the second hole is larger than the diameter of the step part and the diameter of the spline part and smaller than the diameter of the flange part. According to the structure of the utility model, through the multi-layer structure of the flange part, the step part, the spline tooth part and the guide part which are arranged in sequence, the connection of the multi-layer plates can be realized by means of a method of riveting and fixing the top plate and clamping and fixing the bottom plate, the cost is lower, and the strength meets the requirement.

Description

Technical Field

[0001] The utility model relates to a fastening piece, in particular to a multi-layer board riveting fastening piece, a multi-layer board component and a multi-layer board component to be installed. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] In some electronic products or precision electrical appliances, it is usually necessary to partially stack and fit multiple panels together and fix them together to achieve the purpose of structural support.

[0004] Generally, welding is often used to connect and fix multi-layer sheets. However, welding is expensive and requires high technical skills of operators. When welding thin sheets, thermal deformation may occur in some cases, causing local high-temperature burn-through between sheets. In addition, subsequent processing such as grinding and heat treatment may be required after welding, which increases the process steps and affects the processing efficiency. Therefore, some methods use gluing to fix multi-layer sheets, but the strength of gluing is low, especially when subjected to shear and tensile stress, it is easy to break, and the durability is poor, which affects the long-term performance of the multi-layer sheet connection. At the same time, the curing time of gluing is long, which also affects the processing efficiency.

[0005] Currently, there is no multi-layer plate riveting fastener that can solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a multi-layer board riveting fastener, which can realize the connection of the multi-layer boards through the multi-layer structure of the flange part, the step part, the tooth part and the guide part arranged in sequence, by riveting the top plate and clamping the bottom plate, with low cost and meeting the strength requirements.

[0007] In order to achieve the above-mentioned object, the utility model discloses the following multi-layer plate riveting fastener, which is used to connect a top plate and a bottom plate, wherein the top plate has a first hole, the bottom plate has a second hole, and the multi-layer plate riveting fastener comprises a flange portion, a step portion, a tooth portion and a guide portion which are sequentially arranged along the axial direction;

[0008] The diameter of the flange portion is larger than the diameter of the step portion and the diameter of the tooth portion;

[0009] The guiding part turns outwards along the axial direction from the connection part of the guiding part and the flower tooth part to the other end of the guiding part. The diameter of the guiding part at the connection part of the guiding part and the flower tooth part is smaller than the diameter of the flower tooth part, so as to form an annular material-containing area at the connection part of the guiding part and the flower tooth part, and the diameter of the other end of the guiding part is also smaller than the diameter of the flower tooth part;

[0010] Wherein, the diameter of the first hole is between the diameter of the other end of the guiding part and the diameter of the flower tooth part, and the diameter of the second hole is larger than the diameter of the stepped part and the diameter of the flower tooth part, and smaller than the diameter of the flange part.

[0011] Further, the diameter of the stepped part is 10% larger than the diameter of the flower tooth part.

[0012] Further, the thickness of the stepped part along the axial direction is matched with the thickness of the bottom plate along the axial direction.

[0013] Further, the sum of the thicknesses of the flange part and the flower tooth part along the axial direction is matched with the thickness of the top plate along the axial direction.

[0014] Further, the number of the bottom plates is multiple, and the multiple bottom plates are stacked in sequence along the axial direction.

[0015] Further, the thickness of the stepped part along the axial direction is matched with the sum of the thicknesses of the multiple bottom plates along the axial direction.

[0016] Further, on the surface of the flange part for abutting against the top plate, there are saw teeth arranged around the axial direction, and the saw teeth are concave and convex along the axial direction.

[0017] Further, the flower tooth part has flower teeth arranged around the axial direction for accommodating the riveted top plate, and the flower teeth are concave and convex along the radial direction.

[0018] Further, the multi-layer board riveting fastener has an internal threaded hole extending along the axial direction.

[0019] There is also provided a multi-layer board assembly, wherein the multi-layer board assembly includes a top plate and a bottom plate, and the top plate and the bottom plate are fixedly connected by the multi-layer board riveting fastener described above. Among them, the top plate is riveted to the multi-layer board assembly, and the bottom plate is clamped and fixed by the top plate and the multi-layer board assembly together.

[0020] It further includes a multi-layer board assembly to be installed, wherein the multi-layer board assembly to be installed includes a top plate and a bottom plate, and the top plate and the bottom plate are sleeved on the multi-layer board riveting and fastening member according to the above, wherein the bottom surface of the top plate is attached to the serrated portion of the multi-layer board riveting and fastening member, and the bottom surface of the bottom plate is attached to the flange portion of the multi-layer board riveting and fastening member.

[0021] By means of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0022] 1. For the multi-layer board riveting and fastening member of the present utility model, through the multi-layer structure of the flange portion, the stepped portion, the serrated portion and the guiding portion arranged in sequence, the flange portion is used to limit the bottom plate, and the serrated portion and the guiding portion are used to rivet with the top plate, so the fixing strength is higher than that of gluing, and it is more beautiful and lower in cost than welding.

[0023] 2. The flange portion of the multi-layer board riveting and fastening member of the present utility model has serrations that are in contact with the bottom plate, which can effectively increase the friction between the bottom plate and the fastening member, and further improve the earthquake resistance and anti-loosening ability between the multi-layer board riveting and fastening member and the bottom plate. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present specification. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is an axonometric schematic diagram of a multi-layer board riveting and fastening member provided by an embodiment of the present specification;

[0026] Figure 2 is a cross-sectional elevation schematic diagram of a multi-layer board riveting and fastening member provided by an embodiment of the present specification;

[0027] Figure 3 is a schematic diagram before riveting of a multi-layer board riveting and fastening member provided by an embodiment of the present specification;

[0028] Figure 4 is a schematic diagram after riveting of a multi-layer board riveting and fastening member provided by an embodiment of the present specification;

[0029] In the figure: 100, top plate; 101, first hole; 200, bottom plate; 201, second hole; 1, flange portion; 11, serrations; 2, stepped portion; 3, serrated portion; 4, guiding portion; 5, internal threaded hole. Detailed Embodiments

[0030] To enable those skilled in the art to better understand the technical solutions in this specification, the following will clearly and completely describe the technical solutions in the embodiments of this specification in conjunction with the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this specification.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "middle", "lower", "inner", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. The terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following will describe the implementation manners according to the overall structure of the present utility model.

[0032] Please refer to Figures 1-4 , which is a multi-layer board riveting fastener for this embodiment, used to connect the top plate 100 and the bottom plate 200. Among them, the top plate 100 has a first hole 101, and the bottom plate 200 has a second hole 201; among them, the multi-layer board riveting fastener includes a flange portion 1, a stepped portion 2, a serrated portion 3, and a guiding portion 4 arranged in sequence along the axial direction;

[0033] The diameter of the flange portion 1 is greater than the diameters of the stepped portion 2 and the serrated portion 3;

[0034] The guiding portion 4 turns outwards along the axial direction from the connection between the guiding portion 4 and the serrated portion 3 to the other end of the guiding portion 4. The diameter of the guiding portion 4 at the connection between the guiding portion 4 and the serrated portion 3 is smaller than the diameter of the serrated portion 3, so that an annular material receiving area is formed at the connection between the guiding portion 4 and the serrated portion 3, and the diameter of the other end of the guiding portion 4 is also smaller than the diameter of the serrated portion 3;

[0035] Among them, the diameter of the first hole 101 is between the diameter of the other end of the guiding portion 4 and the diameter of the serrated portion 3, and the diameter of the second hole 201 is greater than the diameters of the stepped portion 2 and the serrated portion 3, and smaller than the diameter of the flange portion 1.

[0036] With the above structure, during use, the operator only needs to place the flange portion 1 of the multi-layer board riveting fastener in this embodiment downward on the designated base, and then align the second hole 201 of the bottom plate 200 with the flange portion 1, and axially pass the bottom plate 200 through the guiding portion 4, the serrated portion 3, the stepped portion 2 and the flange portion 1 in sequence, and place it at the position of the flange portion 1. Among them, the bottom surface of the bottom plate 200 is in contact with the annular area of the bottom surface of the flange portion 1. Then, after the bottom plate 200 is placed, in the same way, align the first hole 101 of the top plate 100 with the flange portion 1, axially pass the top plate 100 through the guiding portion 4, and place it at the position of the serrated portion 3. Among them, the bottom surface of the top plate 100 is in contact with the annular area of the top surface of the serrated portion 3. After the top plate 100 and the bottom plate 200 are placed, the riveting mechanism above the top plate 100 can be started to start the riveting operation on the top plate 100. Specifically, the riveting mechanism runs downward along the axis, first contacts the top surface of the top plate 100, and then continues to apply force. Since the material strength of the top plate 100 is less than the material strengths of the riveting mechanism, the guiding portion 4 and the serrated portion 3, during the process of applying force, under the combined limiting action of the riveting mechanism, the guiding portion 4 and the serrated portion 3, the material of the top plate 100 itself undergoes a flow deformation that is not parallel to the axis, so that at least part of the top plate 100 enters the annular material-containing area formed at the connection between the guiding portion 4 and the serrated portion 3, and into the serrated portion 3 at the bottom of the top plate 100. And during the above process, the top plate 100 slowly moves downward and approaches the bottom plate 200. Finally, when the top plate 100 and the bottom plate 200 are completely attached and the bottom plate 200 is completely limited and locked by the top plate 100 above and the flange portion 1 below, the riveting is ended and the riveting mechanism retracts.

[0037] During the above use process, since part of the material of the top plate 100 flows in a direction not parallel to the axis to the annular material-containing area formed at the connection between the guiding portion 4 and the serrated portion 3 after deformation, after the top plate 100 is completely fixed, the top plate 100 is axially limited by the guiding portion 4 and is completely fixed axially relative to the multi-layer board riveting fastener in this embodiment. At the same time, part of the material of the top plate 100 flows into the serrated gaps that are concave and convex in the radial direction of the serrated portion 3 in a direction perpendicular to the axis after deformation, so that the top plate 100 is completely fixed around the axis relative to the serrated portion 3 and cannot rotate under the action of an external force. At the same time, when the top plate 100 is fixed, the top plate 100 presses downward, and the bottom of the top plate 100 contacts the top of the bottom plate 200, so that the bottom plate 200 is completely clamped and limited by the top plate 100 above and the flange portion 1 below. The combined frictional force of the top plate 100 and the flange portion 1 on the bottom plate 200 makes the bottom plate 200 unable to rotate around the axis, thus realizing the complete fixation of the bottom plate 200.

[0038] The entire above process of fixing the top plate 100 and the bottom plate 200 is only to place the top plate 100 and the bottom plate 200 in position and rivet the top plate 100. Compared with the more complex welding process, the efficiency is significantly improved. Moreover, the structure of the top plate 100 undergoes local material flow deformation. Compared with the adhesive fixing method, the fixing strength between the top plate 100 and the bottom plate 200 is significantly more stable and is not affected by temperature and working environment.

[0039] Furthermore, in this embodiment, the diameter of the step portion 2 is larger than the diameter of the flower tooth portion 3. After riveting, the bottom surface of the top plate 100 can abut against the top surface of the step portion 2, enabling the top surface of the step portion 2 and the riveting mechanism to jointly apply an extrusion force to the bottom plate 200, better feeding the material of the bottom plate 200 into the annular material storage area formed at the connection between the guiding portion 4 and the flower tooth portion 3, as well as into the concave-convex flower tooth gaps of the flower tooth portion 3. At the same time, the diameter of the step portion 2 in this embodiment is only slightly larger than the diameter of the flower tooth portion 3 by 10%. Therefore, the diameter of the step portion 2 is smaller, which allows the flange portion 1 with the same diameter to have a larger supporting surface for the bottom plate 200, further enhancing the frictional force on the bottom plate 200. That is to say, the stability of fixing the bottom plate 200 is also better. Similarly, because the diameter of the step portion 2 is only slightly larger than the diameter of the flower tooth portion 3, the step portion 2 does not prevent the overall slight deformation of the top plate 100 during riveting. A small amount of material of the top plate 100 can flow to the area of the step portion 2, and it can also offset the possible plate thickness tolerance between the top plate 100 and the bottom plate 200, making this embodiment have a wider adaptation range.

[0040] Furthermore, the axial thickness of the step portion 2 matches the axial thickness of the bottom plate 200, and the sum of the axial thicknesses of the flange portion 1 and the flower tooth portion 3 matches the axial thickness of the top plate 100. That is to say, please refer to Figure 4 , in this embodiment, after riveting is completed, the combined thickness of the top plate 100 and the bottom plate 200 is exactly the same as the axial thickness of the step portion, the flower tooth portion 3, and the guiding portion 4 above the flange portion 1. This makes it so that at least after the connection between the top plate 100 and the bottom plate 200 is completed, the top of the top plate 100 has a complete plane, which has the characteristics of being beautiful and occupying less space compared to the traditional welding method for fixing between two plates.

[0041] Of course, in another embodiment, there are also the following differences. The number of the bottom plates 200 is multiple, and the multiple bottom plates 200 are stacked in sequence along the axial direction. That is to say, with the structure in this embodiment, two or more bottom plates 200 can be clamped under the top plate 100, and it can be completed only through steps similar to those for a single bottom plate 200. The difference is that when sleeving the bottom plate 200 onto the multi-layer board riveting fastener, after completing the sleeving of one layer of the top plate 100, just repeat the sleeving steps of the next layer of the top plate 100. It should be noted that in this embodiment, if multi-layer bottom plates 200 need to be sleeved, the thickness of the step portion 2 along the axial direction matches the sum of the thicknesses of the multiple bottom plates 200 along the axial direction. The purpose is also to achieve a complete plane at the top of the top plate 100 and avoid the guiding portion 4 occupying other spaces outside the top plate 100.

[0042] Further, as Figure 1 、 Figure 2 shown, on the surface of the flange portion 1 for abutting against the top plate 100, there are sawteeth 11 arranged around the axial direction, and the sawteeth 11 are concave and convex along the axial direction. Through the arrangement of the sawteeth 11, during the riveting process, the top plate 100 presses the bottom plate 200 against the sawteeth 11 of the flange portion 1, so that at least part of the material at the bottom of the bottom plate 200 enters the gaps between the sawteeth 11. After the riveting is completed, a greater frictional force is achieved between the bottom of the bottom plate 200 and the sawteeth 11, making the bottom plate 200 more firmly fixed.

[0043] Of course, in another embodiment, after the riveting is completed, the bottom of the bottom plate 200 does not deform, and the existence of the sawteeth 11 still has a greater frictional force effect on the bottom plate 200 compared to the original smooth plane of the flange portion 1.

[0044] Further, as Figure 1 、 Figure 2 shown, the flower tooth portion 3 has flower teeth arranged around the axial direction for accommodating the riveted top plate 100, and the flower teeth are concave and convex along the radial direction. Specifically, the flower teeth are set as a regular tooth-shaped structure that extends completely parallel to the axial direction, so that during the riveting process, the material at the bottom of the top plate 100 can easily flow into the gaps between the flower teeth of the flower tooth portion 3, achieving a better fixing effect on the top plate 100.

[0045] Further, as Figure 2 shown, the multi-layer board riveting fastener has an internal threaded hole 5 extending along the axial direction. The internal threaded hole 5 penetrates through the flange portion 1, the step portion 2, the flower tooth portion 3, and the guiding portion 4 along the axial direction, so that after the riveting is completed, the riveted top plate 100, the bottom plate 200, and other structures can be mutually matched through the cooperation with externally matched screws, having better flexibility.

[0046] Although different specific embodiments are mentioned in the content of this application, this application is not limited to the situations described by industry standards or embodiments. Some industry standards or implementation schemes slightly modified on the basis of the implementation described by custom methods or embodiments can also achieve the same, equivalent, or similar implementation effects as the above embodiments, or the implementation effects that can be expected after deformation. The embodiments of data acquisition, processing, output, judgment methods, etc. after applying these modifications or deformations still fall within the scope of the optional implementation schemes of this application.

[0047] Although this application is depicted through embodiments, those of ordinary skill in the art know that this application has many variations and changes without departing from the spirit of this application. It is hoped that the appended embodiments include these variations and changes without departing from this application.

Claims

1. A multi-layer plate riveting fastener for connecting a top plate and a bottom plate, wherein: The top plate has a first hole, and the bottom plate has a second hole; the multi-layer plate riveting fastener comprises a flange portion, a step portion, a toothed portion and a guide portion sequentially arranged along the axial direction; The diameter of the flange portion is larger than the diameter of the step portion and the diameter of the tooth portion; The guide portion is turned outward along the axial direction from the connection point between the guide portion and the tooth portion to the other end of the guide portion, and the diameter of the guide portion at the connection point between the guide portion and the tooth portion is smaller than the diameter of the tooth portion, so that an annular material accommodating area is formed at the connection point between the guide portion and the tooth portion, and the diameter of the other end of the guide portion is also smaller than the diameter of the tooth portion; The diameter of the first hole is between the diameter of the other end of the guide portion and the diameter of the tooth portion, and the diameter of the second hole is larger than the diameter of the step portion and the diameter of the tooth portion, and smaller than the diameter of the flange portion.

2. The multi-layer board riveting fastener according to claim 1, characterized in that: The diameter of the step portion is 10% larger than the diameter of the tooth portion.

3. The multi-layer board riveting fastener according to claim 1, characterized in that: The thickness of the step portion along the axial direction matches the thickness of the bottom plate along the axial direction.

4. The multi-layer board riveting fastener according to claim 1, characterized in that: The sum of the thicknesses of the flange portion and the tooth portion along the axial direction matches the thickness of the top plate along the axial direction.

5. The multi-layer board riveting fastener according to claim 1, characterized in that: There are multiple bottom plates, and the multiple bottom plates are stacked in sequence along the axial direction.

6. The multi-layer board riveting fastener according to claim 2, characterized in that: The thickness of the step portion along the axial direction matches the sum of the thicknesses of the plurality of bottom plates along the axial direction.

7. The multi-layer board riveting fastener according to claim 1, characterized in that: The flange portion has a surface for contacting with the top plate with saw teeth arranged around the axial direction, and the saw teeth are concave and convex along the axial direction.

8. The multi-layer board riveting fastener according to claim 1, characterized in that: The toothed portion has teeth arranged around the axial direction for accommodating the top plate after riveting, and the teeth are concave-convex along the radial direction.

9. The multi-layer board riveting fastener according to claim 1, characterized in that: The multi-layer plate riveting fastener has an internal thread hole extending along the axial direction.

10. A multilayer board assembly, characterized in that: The multilayer board assembly includes a top plate and a bottom plate, and the top plate and the bottom plate are fixedly connected by the multilayer board riveting fastener according to claim 1, wherein the top plate is riveted to the multilayer board assembly, and the bottom plate is clamped and fixed by the top plate and the multilayer board assembly.

11. A multi-layer board assembly to be installed, characterized in that: The multi-layer board assembly to be installed includes a top plate and a bottom plate, and the top plate and the bottom plate are mounted on the multi-layer board riveting fastener according to claim 1, wherein the bottom surface of the top plate is in contact with the toothed portion of the multi-layer board riveting fastener, and the bottom surface of the bottom plate is in contact with the flange portion of the multi-layer board riveting fastener.

Images