Fastener and fastening assembly

Abstract

The fastener comprises a wheel flange, the wheel flange is provided with a supporting face, a feeding groove and anti-rotation teeth, an opening of the feeding groove and the supporting face are arranged in the same horizontal direction, the feeding groove is connected with the supporting face and located on the inner side of the supporting face, the depth of the feeding groove is gradually increased from outside to inside, and therefore metal plate materials can be conveniently guided to flow into the feeding groove. The anti-rotation teeth extend from outside to inside and protrude out of the groove bottom of the feeding groove, and the top faces of the anti-rotation teeth and the supporting face are arranged in the same horizontal direction, so that the supporting area is increased, and the strength is improved. When the anti-rotation teeth or the supporting faces penetrate into the feeding groove and flow into the feeding groove, the metal plate materials abut against the side walls of the anti-rotation teeth to achieve the rotation stopping function, the contact area between the side walls of the inner sides of the anti-rotation teeth and the metal plate materials is larger, the anti-rotation effect is improved, the contact area between the side walls of the outer sides of the anti-rotation teeth and the metal plate materials is small, and therefore the anti-rotation effect is improved. And complete contact with a metal plate material is facilitated.

Description

Technical Field

[0001] The invention relates to the field of connecting pieces, and in particular to a fastener and a fastening assembly. Background Art

[0002] Fastener technology is widely used, covering many aspects from household appliances to high-end manufacturing. The development of these technologies has not only improved the quality and reliability of products, but also promoted the progress of related industries. With the continuous advancement and innovation of technology, especially the rapid development of the automotive industry and the intensifying market competition, higher requirements have been placed on the performance and connection applications of automotive fasteners. In particular, there is an urgent need to solve the problems of loosening and falling off of traditional riveted parts, as well as the problems of low processing efficiency, high energy consumption and heavy pollution of traditional welded parts. In the prior art, riveted nuts are usually used to achieve connection. The anti-rotation teeth of existing conventional riveted nuts are usually highly uniform from the outside to the inside, and sheet metal materials are not easy to flow in during riveting. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned defects or problems in the background technology and provide a fastener and a fastening assembly.

[0004] To achieve the above objectives, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Solution 1: A fastener comprising:

[0006] The wheel rim is provided with a supporting surface, a feeding trough and an anti-rotation tooth. The opening of the feeding trough is arranged at the same level as the supporting surface, connected to the supporting surface, and located on the inner side of the supporting surface, and the depth of the feeding trough gradually increases from the outside to the inside; the anti-rotation tooth extends from the outside to the inside, protrudes from the bottom of the feeding trough, and the top surface of the anti-rotation tooth is arranged at the same level as the supporting surface.

[0007] Solution 2, based on Solution 1, further includes a convex navel, the convex navel protrudes from the bottom of the feed trough and is higher than the supporting surface, and the convex navel is provided with a flip hole.

[0008] Solution three, based on solution two, the support surface is located at the outer edge of the rim and has a sharp edge.

[0009] Solution 4: Based on Solution 2, the width of the anti-rotation teeth gradually decreases or increases along the direction toward the bottom of the feed trough.

[0010] Option 5, based on Option 3 or 4, the width of the anti-rotation teeth gradually increases from the outside to the inside.

[0011] Option six, based on options two to four, there are a number of anti-rotation teeth, and the anti-rotation teeth are arranged at intervals so that adjacent anti-rotation teeth and the feed trough are enclosed to form an anti-rotation trough.

[0012] Solution seven, based on Solution two, the inner circumferential wall of the turned hole is composed of at least one section of inclined surfaces connected along the axial direction, so that the thickness of the umbilicus gradually increases from the top to the bottom.

[0013] Solution eight, based on Solution two, further includes an anti-rotation rib, wherein the anti-rotation rib protrudes from the bottom of the outer peripheral wall of the convex navel, and there is a gap between the anti-rotation rib and the bottom of the feed trough.

[0014] Option nine, a fastening assembly, comprising sheet metal and a fastener as described in any one of Options two to eight, the sheet metal being provided with a through hole, the convex navel being suitable for passing through the through hole and allowing the sheet metal to be seated on the support surface and the top end of the anti-rotation tooth, the fastener being suitable for allowing the sheet metal to enter the feed trough after riveting via a rivet head, and the turned hole being suitable for bending outward so that the convex navel and the wheel rim can jointly clamp the sheet metal.

[0015] Option 10, based on Option 9, the sheet metal includes a plate body and a conical ring inclined relative to the plate body and protruding from the plate body, the conical ring faces the feed trough, the conical ring is provided with a sink and the through hole, the sink is connected to the through hole, the convex navel is suitable for being placed in the sink after flanging, and the top surface of the convex navel does not protrude from the opening of the sink.

[0016] From the above description of the present invention and its preferred embodiments, it can be seen that, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0017] 1. Scheme 1 and its preferred embodiment, a fastener includes a rim, the rim is provided with a support surface, a feed trough and an anti-rotation tooth, the opening of the feed trough is arranged at the same level as the support surface, connected to the support surface, and located on the inner side of the support surface, and the feed trough gradually increases in depth from the outside to the inside, so as to facilitate guiding the sheet metal material to flow into the feed trough. The anti-rotation tooth extends from the outside to the inside, protruding from the bottom of the feed trough, and the top surface of the anti-rotation tooth is arranged at the same level as the support surface, which can increase the support area compared to the anti-rotation tooth located in the feed trough, thereby increasing the strength. When the sheet metal material flows into the feed trough due to the penetration of the anti-rotation teeth or the supporting surface, it counteracts the side wall of the anti-rotation teeth to achieve the function of stopping rotation. Since the depth of the feed trough gradually increases from the outside to the inside, based on the fact that the top surface of the anti-rotation teeth and the supporting surface are set at the same level, the inner side wall of the anti-rotation teeth has a larger contact area with the sheet metal material, thereby increasing the anti-rotation effect, while the outer side wall of the anti-rotation teeth has a smaller contact area with the sheet metal material, thereby facilitating full contact with the sheet metal material and increasing the connection.

[0018] 2. In Scheme 2 and its preferred embodiment, the convex navel protrudes from the bottom of the feed trough and is higher than the supporting surface. The convex navel is provided with a flanging hole, so that the flanging hole and flanging can be achieved through the action of the rivet head, so that the convex navel can squeeze the sheet metal so that the sheet metal material flows into the feed trough, and clamp the sheet metal together with the supporting surface, anti-rotation teeth and the bottom of the feed trough to achieve fixation.

[0019] 3. In scheme three and its preferred embodiment, the support surface is located at the outer edge of the rim and has a sharp edge, so that during the riveting process, the support surface with this sharp edge shape can reduce the contact area between the support surface and the sheet metal, increase the contact stress, make the sheet metal easier to deform, and be more conducive to the complete fit between the support surface and the sheet metal surface, thereby ensuring the stability of the riveted structure.

[0020] 4. In the fourth scheme and its preferred embodiment, the width of the anti-rotation teeth gradually decreases toward the bottom of the feed trough, which can improve the anti-slip performance. The width of the anti-rotation teeth gradually increases toward the bottom of the feed trough, which can facilitate the sheet metal to flow into the feed trough.

[0021] 5. In Scheme 5 and its preferred embodiments, the width of the anti-rotation teeth gradually increases from the outside to the inside. During the riveting process, since the anti-rotation torque is mainly affected by the degree of penetration of the anti-rotation teeth on the outside into the sheet metal, the "narrow outside" structure is conducive to the penetration of the anti-rotation teeth into the sheet metal, thereby increasing the anti-rotation torque. On the other hand, the "wide inside" structure increases the contact area between the fastener and the sheet metal, which can maximize the extrusion and deformation of the sheet metal material and flow inward, thereby avoiding the sheet metal from falling out and improving the connection strength. And based on the fact that the width of the anti-rotation teeth gradually decreases along the direction toward the bottom of the feed trough, this structure can increase the pull-off force after riveting. On the whole, in the extension direction of the anti-rotation teeth, there are more different application requirements, and a variable pressure design with outer side pressure reduction and inner side pressure increase is realized.

[0022] 6. In scheme six and its preferred embodiment, there are a number of anti-rotation teeth, and each anti-rotation tooth is spaced apart so that adjacent anti-rotation teeth and the feed trough enclose an anti-rotation groove, thereby improving the anti-rotation effect. When the width of the anti-rotation teeth gradually decreases along the direction toward the bottom of the feed trough, the cross-section of the anti-rotation groove is a "narrow at the top and wide at the bottom" funnel-shaped closing structure. During the riveting process, the sheet metal yields and deforms due to the extrusion force, and the sheet metal material is squeezed into this concave anti-rotation groove. The sheet metal and the side wall of the groove are interlocked to prevent the fastener from rotating and slipping relative to the sheet metal. And there is no need to preset a retaining ring, and only a small structural change is required to achieve a stronger anti-pull-off effect.

[0023] 7. In Scheme 7 and its preferred embodiments, the inner circumferential wall of the flanging hole is composed of at least one section of inclined surfaces connected along the axial direction, so that the thickness of the umbilicus gradually increases from the top to the bottom, presenting a "thin top and thick bottom" structural design. The thicker bottom can ensure the strength of the umbilicus; the thinner top is conducive to flanging or bending, thereby facilitating riveting.

[0024] 8. In Scheme 8 and its preferred embodiments, due to process limitations, the outer edge is usually subjected to greater force deformation during the riveting process, and the inner sheet metal and the root of the protrusion cannot achieve effective deformation. Therefore, the root anti-rotation rib protrudes from the outer wall of the root of the umbilicus and can penetrate into the sheet metal to play an anti-rotation role. In addition, there is a gap between the anti-rotation rib and the bottom of the feed trough, which also has an anti-slip effect.

[0025] 9. In scheme nine and its preferred embodiments, a fastening assembly includes a sheet metal and the above-mentioned fastener, the sheet metal is provided with a through hole, the convex navel is suitable for passing through the through hole, and the sheet metal is seated on the top of the support surface and the anti-rotation tooth, the fastener is suitable for riveting through the rivet head, so that the sheet metal enters the feed trough, and the turned hole is suitable for bending outward so that the convex navel and the rim can jointly buckle the sheet metal.

[0026] 10. In scheme ten and its preferred embodiments, the sheet metal includes a plate body and a conical ring inclined relative to the plate body and protruding from the plate body, the conical ring faces the feed trough to make it easier for the sheet metal to flow into the feed trough, the conical ring is provided with a sink and a through hole, the sink is connected to the through hole, the umbilicus is suitable for being placed in the sink after flanging, and the top surface of the umbilicus does not protrude from the opening of the sink to prevent the sheet metal from being connected to other sheet metals. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 is a three-dimensional diagram of the nut in Example 1;

[0029] Figure 2 is a cross-sectional view of the anti-rotation tooth of the nut in the first embodiment, wherein the width of the anti-rotation tooth gradually decreases in the direction toward the bottom of the feed trough;

[0030] Figure 3 is a cross-sectional view of the nut in Example 1;

[0031] Figure 4 for Figure 3 Enlarged view of the marked area;

[0032] Figure 5 is a schematic diagram of a bolt in Embodiment 1;

[0033] Figure 6 is a cross-sectional view of the anti-rotation tooth of the nut in the first embodiment, wherein the width of the anti-rotation tooth gradually increases in the direction toward the bottom of the feed trough;

[0034] Figure 7 is a cross-sectional view of the sheet metal in the second embodiment;

[0035] Figure 8 This is a schematic diagram of the fastening assembly before riveting in the second embodiment;

[0036] Fig. 9 This is a schematic diagram of the fastening assembly after riveting in Example 2.

[0037] Description of main reference numerals:

[0038] Wheel rim 1; support surface 11; feed trough 12; anti-rotation teeth 13; anti-rotation groove 14; convex navel 2; turning hole 21; inclined surface 211; threaded hole 22; anti-rotation rib 3; sheet metal 4; plate body 41; cone ring 42; sinking groove 43; through hole 44; DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0041] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0042] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0043] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0044] A fastener comprises a wheel rim 1, a convex navel 2 and an anti-rotation rib 3. In this embodiment, the fastener is an example of a nut with a specification of M6, and in other embodiments, it can also be a bolt.

[0045] In this embodiment, the outer contour of the rim 1 is set to be circular with a diameter of 12-18 mm; in other embodiments, the outer contour of the rim 1 can also adopt a quadrangular structure, a hexagonal structure, an octagonal structure, etc., or a stepped combination of the above shapes. The rim 1 is provided with a support surface 11, a feed trough 12 and anti-rotation teeth 13.

[0046] A support surface 11 is provided at the outer edge of the upper surface of the rim 1. The support surface 11 is roughly annular and is arranged around the central axis of the rim 1. After riveting, the support surface 11 is completely in contact with the sheet metal 4. Preferably, the support surface 11 is sharp-edged (which can be achieved through a molding process) so that during the riveting process, the support surface 11 with a sharp edge can reduce the contact area between the support surface 11 and the sheet metal 4, increase the contact stress, make the sheet metal 4 easier to deform, and facilitate the support surface 11 to completely fit with the sheet metal 4, thereby ensuring the stability of the riveted structure. The sharpness of the support surface 11 is 0.2-0.4.

[0047] The opening of the feed chute 12 is arranged at the same level as the support surface 11 and is located inside the support surface 11 and connected to the support surface 11. The feed chute 12 gradually increases in depth from outside to inside and extends to the convex navel 2, and is generally in the shape of a boss.

[0048] The anti-rotation teeth 13 extend from outside to inside, protrude from the bottom of the feeding trough 12, and the top surface of the anti-rotation teeth 13 is arranged at the same level as the supporting surface 11 to support the sheet metal 4 together with the supporting surface 11. The height of the anti-rotation teeth 13 is 0.3-0.5 mm.

[0049] The width of the anti-rotation teeth 13 gradually decreases or increases along the direction toward the bottom of the feed trough 12, wherein the width of the anti-rotation teeth 13 gradually decreases along the direction toward the bottom of the feed trough 12, which can improve the anti-slip performance. The width of the anti-rotation teeth 13 gradually increases along the direction toward the bottom of the feed trough 12, which can facilitate the sheet metal 4 to flow into the feed trough 12. In this embodiment, the width of the anti-rotation teeth 13 gradually decreases along the direction toward the bottom of the feed trough 12.

[0050] There are a number of anti-rotation teeth 13, each anti-rotation tooth 13 is arranged around the central axis of the rim 1, and is arranged at intervals, and is distributed radially from the center to the outer edge, so that the adjacent anti-rotation teeth 13 and the feed trough 12 are enclosed to form an anti-rotation groove 14. Since the width of the anti-rotation teeth 13 gradually decreases along the groove bottom direction toward the feed trough 12, the cross-section of the anti-rotation groove 14 is a "narrow at the top and wide at the bottom" funnel-shaped closing structure. During the riveting process, the sheet metal 4 yields and deforms due to the extrusion force, and the sheet metal 4 material is squeezed into this concave anti-rotation groove 14. The sheet metal 4 and the side wall of the groove form an interlocking to prevent the nut from rotating and slipping relative to the sheet metal 4. And there is no need to preset a retaining ring, and only a small amount of structural changes are required to achieve a stronger anti-pull-off effect. In this embodiment, the depth (circumferential) of the anti-rotation groove 14 is 0.1-0.4mm.

[0051] Preferably, the width of each anti-rotation tooth 13 gradually increases from the outside to the inside, and is in the form of being narrow on the outside and wide on the inside. During the riveting process, since the anti-rotation torque is mainly affected by the degree to which the anti-rotation teeth 13 on the outside penetrate into the sheet metal 4, the "narrow on the outside" structure is conducive to the anti-rotation teeth 13 penetrating into the sheet metal 4, thereby increasing the anti-rotation torque; on the other hand, the "wide on the inside" structure increases the contact area between the nut and the sheet metal 4, and can maximize the extrusion and deformation of the sheet metal 4 material and flow inward, thereby preventing the sheet metal 4 from falling out, increasing the pull-off force after riveting, and improving the connection strength. On the whole, in the extension direction of the anti-rotation teeth 13, there are more different application requirements, and a variable pressure design with outer side pressure reduction and inner side pressure increase is realized.

[0052] In this embodiment, the umbilicus 2 is coaxial with the central axis of the rim 1. The main function of the umbilicus 2 is to be flanged during riveting to fasten the sheet metal 4, thereby generating a resistance force (i.e., pull-off force) against pulling off; the diameter of the umbilicus 2 is 8-10 mm, and the height is 1 mm-4 mm; the umbilicus 2 protrudes from the bottom of the feed trough 12 and is higher than the support surface 11. The umbilicus 2 is provided with a flanged hole 21 and a threaded hole 22, and the flanged hole 21 and the threaded hole 22 are connected to each other. In this embodiment, the flanged hole 21 and the threaded hole 22 are coaxially arranged with the central axis of the rim 1. In other embodiments, of course, they can also be arranged eccentrically. For example, when the outer wall of the rim 1 plays a positioning or limiting function, the threaded hole 22 can be arranged eccentrically with the rim 1.

[0053] Preferably, the inner peripheral wall of the flanging hole 21 is composed of at least one section of inclined surfaces 211 connected in the axial direction, so that the thickness of the umbilicus 2 gradually increases from the top to the bottom. Taking the nut as an example, in order to achieve the purpose of inserting the anti-rotation teeth 13 or the anti-rotation ribs 3 into the sheet metal 4, it is usually necessary to apply a large pressure to squeeze the umbilicus 2. During the flanging process, the bent part of the umbilicus 2 becomes very thin after being squeezed and is easy to break, resulting in a weak pull-off resistance between the rivet nut and the sheet metal 4. Therefore, the wall thickness of the umbilicus 2 gradually increases from its top to the bottom, forming a "thin top and thick bottom" structural design. The bottom end with a larger thickness can ensure the strength of the umbilicus 2; the top end with a smaller thickness is conducive to flanging or bending, thereby facilitating the flanging riveting.

[0054] The anti-rotation rib 3 protrudes from the bottom of the outer peripheral wall of the convex navel 2, and there are several anti-rotation ribs 3, which are located between adjacent anti-rotation teeth 13. Since the nut adopts the flanging riveting process, due to the process limitations, the outer edge is usually subjected to large force deformation during the riveting process, and the inner sheet metal 4 and the root of the protrusion cannot achieve effective deformation. Therefore, the root anti-rotation rib 3 protrudes from the outer wall of the root of the convex navel 2 and can penetrate into the sheet metal 4 to play an anti-rotation role. There is a gap between the anti-rotation rib 3 and the bottom of the feed trough 12, and it also has an anti-slip effect.

[0055] This nut has high connection stability, low cost, and is suitable for connecting plates of different materials and thicknesses (with strong versatility and applicability). It is a metal fastener that can overcome the problems of existing riveted nuts, such as complex structure, high processing difficulty and high cost (for example, existing nuts need to be provided with clamping rings to prevent them from falling off, and the processing of clamping rings requires additional processing technology, which is difficult and costly) and low connection strength (for example, the corresponding riveted sheet metal needs to be processed with riveted bolts or nuts to form countersunk grooves. Due to the hardening of the material, the nut cannot be fully embedded, and there is a risk of loosening. Moreover, due to the large deformation of the material, during the riveting process, the part material cannot flow smoothly and cannot be squeezed into the feed trough, resulting in a loose connection between the riveted nut and the part).

[0056] Compared with the prior art, this embodiment has the following beneficial effects:

[0057] A fastener includes a rim 1, the rim 1 is provided with a support surface 11, a feed trough 12 and an anti-rotation tooth 13, the opening of the feed trough 12 is arranged at the same level as the support surface 11, connected to the support surface 11, and located on the inner side of the support surface 11, and the depth of the feed trough 12 gradually increases from the outside to the inside, so as to facilitate the guidance of sheet metal 4 material into the feed trough 12. The anti-rotation tooth 13 extends from the outside to the inside, protruding from the bottom of the feed trough 12, and the top surface of the anti-rotation tooth 13 is arranged at the same level as the support surface 11, which can increase the area of ​​the support surface 11 compared to the anti-rotation tooth 13 located in the feed trough 12, thereby increasing the strength. When the sheet metal 4 material flows into the feed trough 12 due to the penetration of the anti-rotation teeth 13 or the supporting surface 11, it counteracts the side walls of the anti-rotation teeth 13 to achieve the function of stopping rotation. Since the depth of the feed trough 12 gradually increases from the outside to the inside, based on the fact that the top surface of the anti-rotation teeth 13 and the supporting surface 11 are set at the same level, the inner side wall of the anti-rotation teeth 13 has a larger contact area with the sheet metal 4 material, which can increase the anti-rotation effect, while the outer side wall of the anti-rotation teeth has a smaller contact area with the sheet metal material, which is convenient for complete contact with the sheet metal material and increases the connection.

[0058] In an exemplary embodiment, the convex navel 2 protrudes from the bottom of the feed trough 12 and is higher than the supporting surface 11. The convex navel 2 is provided with a flanging hole 21, so that the flanging hole 21 can be flanging under the action of the rivet head, so that the convex navel 2 can squeeze the sheet metal 4 so that the sheet metal 4 material flows into the feed trough 12, and clamp the sheet metal 4 together with the supporting surface 11, the anti-rotation teeth 13 and the bottom of the feed trough 12 to achieve fixation.

[0059] In an exemplary embodiment, the support surface 11 is located at the outer edge of the rim 1 and has a sharp edge. The feed trough 12 is connected to the support surface 11, so that during the riveting process, the support surface 11 with a sharp edge can reduce the contact area between the support surface 11 and the sheet metal 4, increase the contact stress, make the sheet metal 4 easier to deform, and facilitate the support surface 11 to fit completely with the sheet metal 4 surface, thereby ensuring the stability of the riveted structure.

[0060] In an exemplary embodiment, the width of the anti-rotation teeth 13 gradually decreases toward the bottom of the feed trough 12, which can improve the anti-slip performance. The width of the anti-rotation teeth 13 gradually increases toward the bottom of the feed trough 12, which can facilitate the sheet metal 4 to flow into the feed trough 12.

[0061] In an exemplary embodiment, the width of the anti-rotation teeth 13 gradually increases from the outside to the inside. During the riveting process, since the anti-rotation torque is mainly affected by the degree to which the anti-rotation teeth 13 on the outside penetrate into the sheet metal 4, the "narrow outside" structure is conducive to the anti-rotation teeth 13 penetrating into the sheet metal 4, thereby increasing the anti-rotation torque. On the other hand, the "wide inside" structure increases the contact area between the fastener and the sheet metal 4, which can maximize the extrusion and deformation of the sheet metal 4 material and flow inward, thereby preventing the sheet metal 4 from falling out and improving the connection strength. And based on the fact that the width of the anti-rotation teeth 13 gradually decreases along the direction toward the bottom of the feed trough 12, this structure can increase the pull-off force after riveting. On the whole, in the extension direction of the anti-rotation teeth 13, there are more different application requirements, realizing a variable pressure design with outer pressure reduction and inner pressure increase.

[0062] In an exemplary embodiment, there are a number of anti-rotation teeth 13, and each anti-rotation tooth 13 is arranged at intervals so that adjacent anti-rotation teeth 13 and the feed trough 12 enclose an anti-rotation groove 14, thereby improving the anti-rotation effect. When the width of the anti-rotation teeth 13 gradually decreases along the groove bottom direction toward the feed trough 12, the cross-section of the anti-rotation groove 14 is a "narrow at the top and wide at the bottom" funnel-shaped closing structure. During the riveting process, the sheet metal 4 yields and deforms due to the extrusion force, and the sheet metal 4 material is squeezed into this concave anti-rotation groove 14. The sheet metal 4 and the side wall of the groove form an interlocking to prevent the fastener from rotating and slipping relative to the sheet metal 4. And there is no need to preset a clamping ring, and only a small structural change is required to achieve a stronger anti-pull-off effect.

[0063] In an exemplary embodiment, the inner circumferential wall of the flanging hole 21 is composed of at least one section of inclined surfaces 211 connected axially, so that the thickness of the umbilicus 2 gradually increases from the top to the bottom, presenting a "thin top and thick bottom" structural design. The thicker bottom can ensure the strength of the umbilicus 2; the thinner top is conducive to flanging or bending, thereby facilitating riveting.

[0064] In an exemplary embodiment, due to process limitations, the outer edge is usually subjected to greater force deformation during the riveting process, and the inner sheet metal 4 and the root of the protrusion cannot achieve effective deformation. Therefore, the root anti-rotation rib 3 protrudes from the outer wall of the root of the umbilicus 2 and can penetrate into the sheet metal 4 to play an anti-rotation role. In addition, there is a gap between the anti-rotation rib 3 and the bottom of the feed trough 12, which also has an anti-slip effect.

[0065] Embodiment 2

[0066] A fastening assembly includes a sheet metal 4 and the above-mentioned fastener, the sheet metal 4 includes a plate body 41 and a conical ring 42 inclined relative to the plate body 41 and protruding from the plate body 41, the conical ring 42 faces the feed trough 12, the conical ring 42 is provided with a sink 43 and a through hole 44, the sink 43 is connected to the through hole 44, the convex navel 2 is suitable for being placed in the sink 43 after flanging, and the top surface of the convex navel 2 does not protrude from the opening of the sink 43.

[0067] The umbilicus 2 is suitable for passing through the through hole 44 and allowing the sheet metal 4 to be located on the top of the support surface 11 and the anti-rotation teeth 13. The fastener is suitable for allowing the sheet metal 4 to enter the feed trough 12 after riveting, and the turned hole 21 is suitable for bending outward so that the umbilicus 2 and the rim 1 can jointly hold the sheet metal 4.

[0068] Specifically, during the riveting process, the convex navel 2 yields and deforms due to the pressure of the rivet head until it bends and buckles the sheet metal 4; at the same time, the rivet head and the bent and deformed convex navel 2 squeeze the sheet metal 4 to deform, and the support surface 11 and the top of the anti-rotation tooth 13 are close to the sheet metal 4 to play a supporting role, and the "outer narrow" multifunctional anti-rotation tooth 13 penetrates into the sheet metal 4. At the same time, the sheet metal 4 material is also squeezed into the concave anti-rotation groove 14 in the shape of a funnel-shaped groove. The concave anti-rotation groove 14 has a "narrow on the top and wide on the bottom" funnel-shaped closing structure in the circumferential and axial directions; during the riveting process, the sheet metal 4 yields and deforms due to the extrusion force, and the sheet metal 4 material is squeezed into this concave anti-rotation groove 14, in which the sheet metal 4 and the side wall of the groove form an interlocking to prevent the nut from rotating and slipping relative to the sheet metal 4. And there is no need to preset a clamping ring, and only a small amount of structural changes are required to achieve a stronger anti-pull-off effect.

[0069] The wall thickness of the root of the umbilicus 2 is relatively thick to ensure the strength of the umbilicus 2, and the top with a smaller thickness is conducive to flanging or bending, thereby facilitating riveting. On the other hand, the multifunctional anti-rotation teeth 13 of the "inner width" structure maximize the extrusion deformation and flow of the sheet metal 4 material to the inside, and the anti-rotation ribs 3 are arranged on the outer wall of the root of the umbilicus 2 to squeeze and fasten the sheet metal 4 together to play an anti-rotation role. This prevents the sheet metal 4 from falling out, increases the pull-off force after riveting, and improves the connection strength.

[0070] Finally, the flange of the convex navel 2 is completed and fastened to the sheet metal 4, and the support surface 11, the bottom of the feed trough 12, and the top of the anti-rotation tooth 13 support the sheet metal 4 to provide stable circumferential support force. The flange of the convex navel 2 and the concave anti-rotation groove 14 can ensure that the nut will not peel off the sheet metal 4 under a certain axial load; the interlocking structure formed by the concave anti-rotation groove 14, the multifunctional anti-rotation tooth 13 and the sheet metal 4 can ensure that the nut will not rotate relative to the sheet metal 4 under a large torque. Similarly, this method is also applicable to the self-clinching bolt.

[0071] Compared with the prior art, this embodiment has the following beneficial effects:

[0072] In an exemplary embodiment, a fastening assembly includes a sheet metal 4 and the above-mentioned fastener, the sheet metal 4 is provided with a through hole 44, the umbilicus 2 is suitable for passing through the through hole 44, and the sheet metal 4 is located on the top of the support surface 11 and the anti-rotation tooth 13, the fastener is suitable for riveting through the rivet head, so that the sheet metal 4 enters the feed trough 12, and the turned hole 21 is suitable for bending outward so that the umbilicus 2 and the rim 1 jointly buckle the sheet metal 4.

[0073] In an exemplary embodiment, the sheet metal 4 includes a plate body 41 and a conical ring 42 that is inclined relative to the plate body 41 and protrudes from the plate body 41. The conical ring 42 faces the feed trough 12 to make it easier for the sheet metal 4 to flow into the feed trough 12. The conical ring 42 is provided with a sink 43 and a through hole 44. The sink 43 is connected to the through hole 44. The umbilicus 2 is suitable for being placed in the sink 43 after flanging, and the top surface of the umbilicus 2 does not protrude from the opening of the sink 43 to prevent the sheet metal 4 from being connected to other sheet metals 4.

[0074] The description of the above specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the enlightenment of the present invention or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent substitutions or other improvements to the embodiments of the present invention or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the present invention.

Claims

1. A fastener, characterized in that: include A wheel rim (1) is provided with a supporting surface (11), a feeding trough (12) and an anti-rotation tooth (13); the opening of the feeding trough (12) is arranged at the same level as the supporting surface (11), is connected to the supporting surface (11), and is located on the inner side of the supporting surface (11); and the depth of the feeding trough (12) gradually increases from the outside to the inside; the anti-rotation tooth (13) extends from the outside to the inside, protrudes from the bottom of the feeding trough (12), and the top surface of the anti-rotation tooth (13) is arranged at the same level as the supporting surface (11).

2. A fastener according to claim 1, characterized in that: It also comprises a convex navel (2), the convex navel (2) protruding from the bottom of the feed trough (12) and higher than the supporting surface (11), and the convex navel (2) is provided with a turned hole (21).

3. A fastener according to claim 2, characterized in that: The supporting surface (11) is located at the outer edge of the wheel rim (1) and has a sharp edge.

4. A fastener according to claim 2, characterized in that: The width of the anti-rotation teeth (13) gradually decreases or increases along the direction toward the bottom of the feeding trough (12).

5. A fastener according to claim 3 or 4, characterized in that: The anti-rotation teeth (13) gradually increase in width from the outside to the inside.

6. A fastener according to any one of claims 2 to 4, characterized in that: There are a plurality of anti-rotation teeth (13), and the anti-rotation teeth (13) are arranged at intervals so that adjacent anti-rotation teeth (13) and the feed trough (12) are enclosed to form an anti-rotation trough (14).

7. A fastener according to claim 2, characterized in that: The inner peripheral wall of the turned hole (21) is composed of at least one section of inclined surfaces (211) connected in the axial direction, so that the thickness of the umbilicus (2) gradually increases from the top end to the bottom end.

8. A fastener according to claim 2, characterized in that: It also includes an anti-rotation rib (3), which protrudes from the bottom of the outer peripheral wall of the convex navel (2), and there is a gap between the anti-rotation rib (3) and the bottom of the feed trough (12).

9. A fastening assembly, characterized in that: It comprises a sheet metal (4) and a fastener as claimed in any one of claims 2 to 8, wherein the sheet metal (4) is provided with a through hole (44), the convex navel (2) is suitable for passing through the through hole (44), and the sheet metal (4) is located on the top of the support surface (11) and the anti-rotation tooth (13), the fastener is suitable for riveting through a rivet head, so that the sheet metal (4) enters the feed trough (12), and the turned hole (21) is suitable for bending outwards so that the convex navel (2) and the rim (1) jointly buckle the sheet metal (4).

10. A fastening assembly according to claim 9, characterized in that: The sheet metal (4) comprises a plate body (41) and a conical ring (42) which is inclined relative to the plate body (41) and protrudes from the plate body (41); the conical ring (42) faces the feed trough (12); the conical ring (42) is provided with a sink groove (43) and the through hole (44); the sink groove (43) is connected to the through hole (44); the convex navel (2) is suitable for being placed in the sink groove (43) after flanging, and the top surface of the convex navel (2) does not protrude from the opening of the sink groove (43).

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