Hippocampus rivet

Abstract

The utility model relates to the technical field of rivets, in particular to a hippocampus rivet, which comprises a rivet core and a rivet shell, the rivet core comprises a rivet head, a riveting section, a snapping section and a rivet rod, the peripheral surface of the riveting section is provided with a first annular convex pattern and vertical convex teeth, the first annular convex pattern is arranged at the upper part of the riveting section in a surrounding manner, and the vertical convex teeth are arranged at the lower part of the riveting section. The vertical convex teeth are distributed on the lower portion of the riveting section at intervals in the circumferential direction of the riveting section, and the first annular convex lines and the vertical convex teeth all protrude out of the outer wall face of the riveting section; the nail shell comprises a nail shell body and a nail cap, and through holes are formed in the nail shell body and the nail cap in a penetrating mode. Through mutual cooperation of the first annular convex lines and the vertical convex teeth, tight engagement of the rivet core and the inner wall of the rivet shell can be achieved, the locking force of the rivet core is improved, axial movement and circumferential rotation of the rivet core in the rivet shell can be limited after riveting, the rivet core is effectively prevented from loosening and falling off, the connection strength between riveted workpieces is guaranteed, and the service life of the rivet core is prolonged. The technical problems that an existing hippocampus rivet core is insufficient in locking force, and the rivet core is prone to loosening and falling off after riveting are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rivet technical field, especially a kind of sea horse rivet. BACKGROUND

[0002] Sea horse rivet is a kind of high-strength, high-reliability fastener, usually by nail core and nail shell is composed, mainly used in need to withstand larger load or vibration occasion, such as aerospace, rail transit, shipbuilding, heavy machinery etc. In order to prevent the use of working condition (especially severe vibration working condition) under the nail core in the nail shell loose drop, the neck of the nail core of existing sea horse rivet is usually provided with transverse ring groove structure, but this single tooth structure still exists locking force is insufficient, riveting after nail core is prone to loose drop problem, main reason is as follows: (1) the transverse ring groove belongs to reducing diameter structure, its diameter is smaller than the diameter before nail core processing, and is gradually reduced, so the transverse ring groove can only shallowly embedded in the inner wall of nail shell when riveting, and the embedding degree will also be gradually weakened, leading to the occlusion of nail core and the inner wall of nail shell is not tight, in the use of working condition, it will lead to nail core loose drop for a long time, in turn reduce the connection strength between workpieces, damage workpiece;(2) the transverse ring groove cannot limit in circumferential direction, nail core is prone to circumferential rotation in the nail shell under severe vibration working condition, in turn affect the connection strength between workpieces. SUMMARY

[0003] In view of the problems in the background art, the purpose of the utility model is to provide a kind of sea horse rivet, can realize the occlusion of nail core and the inner wall of nail shell, improve the locking force of nail core, and after riveting, it can limit the axial movement and circumferential rotation of nail core in the nail shell, effectively prevent nail core loose drop, guarantee the connection strength between riveting workpieces, solve the technical problems of insufficient locking force of nail core of existing sea horse rivet, riveting after nail core is prone to loose drop.

[0004] To achieve the above object, the utility model provides a kind of sea horse rivet, including nail core and nail shell, the nail core includes nail head, riveting section, pull apart section and nail rod, the riveting section is connected between the nail head and the pull apart section, the lower end of the pull apart section is connected with the nail rod;

[0005] The outer circumferential surface of the riveting section is provided with first annular relief and vertical relief, the first annular relief is distributed in the upper portion of the riveting section along the axial direction of the riveting section, the first annular relief is wrapped around the outer circumferential surface of the riveting section, and the first annular relief is arranged protruding from the outer wall surface of the riveting section;The vertical relief is distributed in the lower portion of the riveting section along the circumferential direction of the riveting section, the vertical relief is arranged along the axial direction of the riveting section, and the vertical relief is arranged protruding from the outer wall surface of the riveting section;

[0006] The nail shell comprises a nail shell body and a nail cap, the nail cap is connected to the lower end of the nail shell body, the nail cap is arranged protruding along the circumference of the nail shell body, and the nail shell body and the nail cap are provided with a through hole.

[0007] Optionally, a first annular groove is arranged around the outer circumferential surface of the riveting section, and the first annular groove is arranged between two adjacent first annular convex ridges.

[0008] Optionally, a second annular groove is arranged around the outer circumferential surface of the riveting section, and the second annular groove is arranged between the nail head and the first annular convex ridge, and the axial width of the second annular groove is greater than the axial width of the first annular convex ridge.

[0009] Optionally, the through hole comprises a first inner hole and a second inner hole connected in communication, the second inner hole is arranged close to the nail cap and extends to the inside of the nail cap, and the diameter L1 of the second inner hole is less than the outer diameter L2 of the vertical convex tooth.

[0010] Optionally, the nail shell body is provided with a pressing part and a fixing part, the upper end of the fixing part is connected to the pressing part, the lower end of the fixing part is connected to the nail cap, and the wall thickness of the pressing part is less than the wall thickness of the fixing part.

[0011] Optionally, the through hole further comprises an expanded inner hole, the expanded inner hole is connected to the lower end of the second inner hole, and the diameter of the expanded inner hole is greater than the diameter L1 of the second inner hole.

[0012] Optionally, the nail cap is in a bowl shape, the nail cap is provided with an abutting surface, and when the nail core is assembled with the nail shell, the abutting surface is arranged towards the nail head.

[0013] Optionally, a second annular convex ridge is arranged around the outer circumferential surface of the nail rod, the second annular convex ridges are distributed at intervals along the axial direction of the nail rod, and the second annular convex ridges are arranged at the lower part of the nail rod.

[0014] Optionally, a breakage groove is arranged around the outer circumferential surface of the breakage section, and the diameter of the breakage groove is less than the diameter of the first annular groove and the diameter of the second annular groove.

[0015] Compared with the prior art, the embodiments of the utility model have the following beneficial effects:

[0016] 1. By setting the first annular convex and vertical convex teeth cooperate with each other, realize the tight engagement of the nail core and the inner wall of the nail shell, can greatly improve the locking force of the nail core, and can limit the axial movement and circumferential rotation of the nail core in the nail shell after riveting, effectively prevent the riveting connection strength from being reduced and the workpiece from being damaged due to the loosening and falling of the nail core after riveting, ensure the connection strength between the riveted workpieces, solve the technical problems of insufficient locking force of the existing sea horse rivet nail core and easy loosening and falling of the nail core after riveting.

[0017] 2. By setting the first annular groove and the second annular groove, the concave-convex cooperation with the first annular convex can be formed, so that the inner wall of the nail core and the nail shell is in mutual engagement during the pull riveting, the engagement area and the engagement depth of the nail core and the inner wall of the nail shell are increased, and the locking force of the nail core is further improved.

[0018] 3. By setting the diameter L1 of the second inner hole smaller than the outer diameter L2 of the vertical convex tooth, the vertical convex tooth can be pressed into the second inner hole in an interference manner during the pull riveting, so as to increase the sliding resistance between the vertical convex tooth and the inner wall of the nail shell, and further improve the locking force of the nail core. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structure diagram of the nail core of the sea horse rivet of an embodiment of the present application.

[0020] Figure 2 is a structure diagram of the nail core of the sea horse rivet of an embodiment of the present application.

[0021] Figure 3 is Figure 2 the enlarged structure diagram of A.

[0022] Figure 4 is a sectional view of the nail shell of the sea horse rivet of an embodiment of the present application.

[0023] Figure 5 is a partial sectional view of the sea horse rivet of an embodiment of the present application after the nail core and the nail shell are assembled and pressed.

[0024] Figure 6 is Figure 5 the enlarged structure diagram of B.

[0025] Figure 7 is a structure diagram of the sea horse rivet after being assembled and pressed through the pre-set holes of the two workpieces to be fixed.

[0026] Figure 8 is a partial sectional view of the sea horse rivet of an embodiment of the present application after riveting.

[0027] The components include: nail core 1, nail head 11, riveting section 12, first annular convex groove 121, vertical convex tooth 122, first annular groove 123, second annular groove 124, breakage section 13, breakage groove 131, nail rod 14, second annular convex groove 141, nail shell 2, nail shell body 21, embossing part 211, fixing part 212, nail cap 22, abutting surface 221, through hole 23, first inner hole 231, second inner hole 232, expansion inner hole 233, and workpiece 3. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis.

[0030] like Figures 1 to 4 As shown, in order to solve the above-mentioned technical problems, this utility model proposes a seahorse rivet, including a rivet core 1 and a rivet shell 2. The rivet core 1 includes a rivet head 11, a riveting section 12, a breakable section 13 and a rivet rod 14. The riveting section 12 is connected between the rivet head 11 and the breakable section 13, and the rivet rod 14 is connected to the lower end of the breakable section 13.

[0031] The outer peripheral surface of the riveting section 12 is provided with a first annular ridge 121 and a vertical ridge 122. The first annular ridge 121 is distributed at intervals along the axial direction of the riveting section 12 at the upper part of the riveting section 12, the first annular ridge 121 surrounds the outer peripheral surface of the riveting section 12, and the first annular ridge 121 protrudes from the outer wall surface of the riveting section 12. The vertical ridge 122 is distributed at intervals along the circumferential direction of the riveting section 12 at the lower part of the riveting section 12, the vertical ridge 122 is arranged along the axial direction of the riveting section 12, and the vertical ridge 122 protrudes from the outer wall surface of the riveting section 12.

[0032] The nail shell 2 includes a nail shell body 21 and a nail head 22. The nail head 22 is connected to the lower end of the nail shell body 21 and protrudes circumferentially along the nail shell body 21. A through hole 23 is provided through the nail shell body 21 and the nail head 22.

[0033] When using a seahorse rivet, the rivet core 1 is passed through the through hole 23 of the rivet shell 2, so that the rivet head 11 abuts against the upper end of the rivet shell body 21, completing the assembly of the rivet core 1 and the rivet shell 2. Then, the assembled seahorse rivet is passed through the preset holes of the two workpieces 3 to be connected, so that the rivet head 11 and the rivet cap 22 are respectively on both sides of the preset hole. Then, the rivet is riveted by a riveting tool (such as a rivet gun). During the riveting process, the riveting tool clamps and pulls the rivet shank 14 to move away from the preset hole of the workpiece 3, and drives the rivet head 11 to move closer to the preset hole of the workpiece 3. The upper end of the rivet shell body 21 bulges outward under the pressure of the rivet head 11 to form a bulging structure. The rivet shank 14 is pulled further. Since the rivet shell body 21 can no longer deform, the breakage section 13 breaks under the pulling force of the riveting tool, so that the rivet shank 14 is separated from the riveting section 12, and finally a firm riveting is formed on the workpiece 3.

[0034] By providing a first annular ridge 121 on the outer circumferential surface of the riveting section 12, since the first annular ridge 121 protrudes from the outer wall surface of the riveting section 12, that is, the outer diameter of the first annular ridge 121 is larger than the outer diameter of the cylindrical riveting section 12, the first annular ridge 121 is a transversely increased diameter structure. Thus, during riveting, the first annular ridge 121 can be deeply embedded into the inner wall of the nail shell body 21 under the pulling force of the riveting tool, forming a tight engagement state, thereby enhancing the locking force of the nail core 1. Furthermore, after riveting, it can restrict the axial movement of the nail core 1, effectively preventing the nail core 1 from loosening and falling out. The transverse annular groove of the existing seahorse rivet core is a diameter-reducing structure, with its diameter smaller than the original diameter of the core, decreasing ring by ring. This not only makes diameter reduction difficult to manufacture, but also results in the transverse annular groove only shallowly embedding into the inner wall of the rivet shell during riveting, with the embedding decreasing ring by ring. This leads to a loose engagement between the core and the inner wall of the rivet shell, insufficient locking force, and easy loosening after riveting. In contrast, the first annular protrusion 121 of the core 1 is a diameter-enhancing structure. Therefore, it can be manufactured using diameter-enhancing processing (such as thread rolling), which is easy to manufacture, has high production efficiency, and provides a tight engagement with the inner wall of the rivet shell 2, with strong locking force. This effectively prevents axial movement and loosening of the core 1 after riveting.

[0035] Meanwhile, by providing vertical protrusions 122 on the outer circumferential surface of the riveting section 12, since the vertical protrusions 122 protrude from the outer wall surface of the riveting section 12, that is, the outer diameter of the vertical protrusions 122 is larger than the outer diameter of the cylindrical riveting section 12, the vertical protrusions 122 are also a diameter-enhanced structure, so that the vertical protrusions 122 can be tightly bonded to the inner wall of the nail shell body 21 during riveting, and the circumferential rotation of the nail core 1 can be restricted after riveting, further improving the locking force of the nail core 1.

[0036] In summary, by setting the first annular convex groove 121 and the vertical convex tooth 122 to cooperate with each other, the nail core 1 and the inner wall of the nail shell 2 can be tightly engaged, which can greatly improve the locking force of the nail core 1. It can also restrict the axial movement and circumferential rotation of the nail core 1 in the nail shell 2 after riveting, effectively preventing the nail core 1 from loosening and falling off after riveting, thus reducing the connection strength of the riveting and damaging the workpiece 3, ensuring the connection strength between the riveted workpieces 3, and solving the technical problems of insufficient locking force of the nail core of existing seahorse rivets and easy loosening and falling off of the nail core after riveting.

[0037] like Figure 3 As shown, to further illustrate, the outer peripheral surface of the riveting section 12 is provided with a first annular groove 123, which is located between two adjacent first annular protrusions 121.

[0038] By setting a first annular groove 123 between adjacent first annular protrusions 121, the inner wall of the nail shell body 21 can be embedded into the first annular groove 123 under the pulling force of the riveting tool during riveting, so that the nail core 1 and the inner wall of the nail shell body 21 are interlocked, further improving the locking force of the nail core 1.

[0039] Preferably, the number of the first annular ridges 121 is three.

[0040] like Figure 3 As shown, to further illustrate, the outer circumferential surface of the riveting section 12 is provided with a second annular groove 124, which is located between the nail head 11 and the first annular ridge 121. The axial width of the second annular groove 124 is greater than the axial width of the first annular ridge 121.

[0041] It should be noted that the axial width of the second annular groove 124 refers to the width of the second annular groove 124 along the axial direction of the riveting section 12, and the axial width of the first annular ridge 121 refers to the width of the first annular ridge 121 along the axial direction of the riveting section 12.

[0042] By providing a second annular groove 124 between the nail head 11 and the first annular ridge 121, the inner wall of the upper end of the nail shell body 21 can be embedded into the second annular groove 124 under the pulling force of the riveting tool during riveting. Furthermore, by setting the axial width of the second annular groove 124 to be greater than the axial width of the first annular ridge 121, the embedding area between the inner wall of the nail shell body 21 and the second annular groove 124 can be increased, thereby enhancing the biting force between the nail core 1 and the nail shell 2 and further improving the locking force of the nail core 1.

[0043] like Figure 3 and Figure 4 As shown, to further illustrate, the through hole 23 includes a first inner hole 231 and a second inner hole 232 that are connected. The second inner hole 232 is located near the nail head 22 and extends into the interior of the nail head 22. The diameter L1 of the second inner hole 232 is smaller than the outer diameter L2 of the vertical protrusion 122.

[0044] By setting the diameter L1 of the second inner hole 232 to be smaller than the outer diameter L2 of the vertical protrusion 122, the vertical protrusion 122 enters the second inner hole 232 during riveting. At this time, the vertical protrusion 122 is pressed into the second inner hole 232 in an interference manner, which further enhances the locking force of the nail core 1.

[0045] like Figure 4 As shown, to further illustrate, the nail shell body 21 is provided with an embossing part 211 and a fixing part 212. The upper end of the fixing part 212 is connected to the embossing part 211, and the lower end of the fixing part 212 is connected to the nail head 22. The wall thickness of the embossing part 211 is less than the wall thickness of the fixing part 212.

[0046] By setting the wall thickness of the embossing part 211 to be less than the wall thickness of the fixing part 212, the embossing part 211 can have the ability to bulge outwards during riveting.

[0047] like Figure 5 and Figure 6 As shown, specifically, the embossing part 211 takes the shape of a waist drum, which is small at both ends and large in the middle, after embossing.

[0048] After the nail core 1 and the nail shell 2 are assembled, the embossing part 211 can be embossed into a waist drum shape that is small at both ends and large in the middle. This can further enhance the deformation ability of the embossing part 211 to bulge outward during riveting, so that the embossing part 211 can be quickly deformed into a disc shape under the pressure of the nail head 11, thereby improving the riveting efficiency.

[0049] like Figure 4As shown, preferably, the through hole 23 further includes an expanded inner hole 233, which is connected to the lower end of the second inner hole 232, and the diameter of the expanded inner hole 233 is larger than the diameter L1 of the second inner hole 232.

[0050] By setting the diameter of the expansion inner hole 233 to be larger than the diameter L1 of the second inner hole 232, the rivet rod 14 located in the expansion inner hole 233 can have more room to move during riveting, thereby reducing the impact on the rivet shell 2 when the upper end of the rivet rod 14 is broken, and reducing the damage to the rivet shell 2.

[0051] like Figure 4 and Figure 5 As shown, to further illustrate, the nail head 22 is bowl-shaped and has an abutment surface 221. When the nail core 1 is assembled with the nail shell 2, the abutment surface 221 faces the nail head 11.

[0052] By setting the nail head 22 to a bowl shape and the abutting surface 221, the abutting surface 221 can be made to abut against the surface of the workpiece 3 during riveting, thereby increasing the contact area between the nail head 22 and the workpiece 3. After riveting is completed, the abutting surface 221 is tightly bonded to the surface of the workpiece 3, thereby enhancing the stability of the riveting structure.

[0053] like Figure 1 As shown, to further illustrate, the outer peripheral surface of the nail rod 14 is provided with a second annular ridge 141, and the second annular ridge 141 is distributed at intervals along the axial direction of the nail rod 14, and the second annular ridge 141 is provided at the lower part of the nail rod 14.

[0054] By providing the second annular ridge 141 around the outer circumferential surface of the rivet 14, the frictional resistance between the rivet 14 and the clamping part of the riveting tool can be increased during riveting, avoiding slippage during riveting and improving riveting efficiency.

[0055] like Figure 3 As shown, to further illustrate, the outer peripheral surface of the breakable section 13 is provided with a breakable groove 131, the diameter of which is smaller than the diameter of the first annular groove 123 and the diameter of the second annular groove 124.

[0056] By setting the breakage groove 131, it is equivalent to setting a preset weak point on the nail core 1. Since the diameter of the breakage groove 131 is smaller than the diameter of the first annular groove 123 and the second annular groove 124, the tensile force that the breakage groove 131 can withstand is smaller than that of the first annular groove 123 and the second annular groove 124. During the riveting process, when the nail shell body 21 is compressed into a disc shape and cannot continue to deform, the nail core 1 will break first at the breakage groove 131 under the pulling force of the riveting tool. This ensures that the breakage position is accurate and effectively avoids the nail core 1 breaking at an unexpected position, which would affect the locking effect and connection strength after riveting.

[0057] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A seahorse rivet, characterized in that, It includes a nail core and a nail shell. The nail core includes a nail head, a riveting section, a breakable section, and a nail shank. The riveting section is connected between the nail head and the breakable section, and the nail shank is connected to the lower end of the breakable section. The outer peripheral surface of the riveting section is provided with a first annular ridge and vertical ridges. The first annular ridge is distributed at intervals along the axial direction of the riveting section on the upper part of the riveting section and surrounds the outer peripheral surface of the riveting section, and the first annular ridge protrudes from the outer wall surface of the riveting section. The vertical ridges are distributed at intervals along the circumferential direction of the riveting section on the lower part of the riveting section and are arranged along the axial direction of the riveting section, and the vertical ridges protrude from the outer wall surface of the riveting section. The nail shell includes a nail shell body and a nail head. The nail head is connected to the lower end of the nail shell body and protrudes circumferentially along the nail shell body. A through hole is provided through the nail shell body and the nail head.

2. The seahorse rivet according to claim 1, characterized in that, The outer circumferential surface of the riveting section is provided with a first annular groove, which is located between two adjacent first annular protrusions.

3. The seahorse rivet according to claim 2, characterized in that, The outer circumferential surface of the riveting section is provided with a second annular groove, which is located between the nail head and the first annular ridge. The axial width of the second annular groove is greater than the axial width of the first annular ridge.

4. The seahorse rivet according to claim 1, characterized in that, The through hole includes a first inner hole and a second inner hole that are connected to each other. The second inner hole is located near the nail head and extends into the interior of the nail head. The diameter L1 of the second inner hole is smaller than the outer diameter L2 of the vertical protrusion.

5. The seahorse rivet according to claim 4, characterized in that, The nail shell body is provided with an embossing part and a fixing part. The upper end of the fixing part is connected to the embossing part, and the lower end of the fixing part is connected to the nail head. The wall thickness of the embossing part is smaller than the wall thickness of the fixing part.

6. The seahorse rivet according to claim 4, characterized in that, The through hole also includes an expanded inner hole, which is connected to the lower end of the second inner hole, and the diameter of the expanded inner hole is larger than the diameter L1 of the second inner hole.

7. The seahorse rivet according to claim 1, characterized in that, The nail head is bowl-shaped and has an abutting surface. When the nail core is assembled with the nail shell, the abutting surface faces the nail head.

8. The seahorse rivet according to claim 1, characterized in that, The outer circumferential surface of the nail rod is provided with a second annular ridge, and the second annular ridge is distributed at intervals along the axial direction of the nail rod, and the second annular ridge is provided at the lower part of the nail rod.

9. The seahorse rivet according to claim 3, characterized in that, The outer circumferential surface of the breakage section is provided with a breakage groove, the diameter of which is smaller than the diameter of the first annular groove and the diameter of the second annular groove.

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