CN216241755U - Rivet fastener - Google Patents
Rivet fastener Download PDFInfo
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- CN216241755U CN216241755U CN202121797680.6U CN202121797680U CN216241755U CN 216241755 U CN216241755 U CN 216241755U CN 202121797680 U CN202121797680 U CN 202121797680U CN 216241755 U CN216241755 U CN 216241755U
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- external thread
- hole
- bolt
- thread part
- riveting
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Abstract
The utility model discloses a rivet fastener, wherein a bolt is in transition fit or interference fit in a riveting shell. The first guide section of the bolt is connected with the first external thread part and the second external thread part; the external threads of the first external thread part and the external threads of the second external thread part have opposite rotation directions; when the external thread of the first external thread part is a left-hand external thread, the external thread of the second external thread part is a right-hand external thread; when the external thread of the first external thread part is a right-handed external thread, the external thread of the second external thread part is a left-handed external thread; and the first external thread portion has a nominal diameter greater than a nominal diameter of the second external thread portion. The riveting shell is characterized in that an inner cavity of the riveting shell is provided with a lead-in through hole, the upper half part of the lead-in through hole is an internal threaded hole, and the lower half part of the lead-in through hole is a unthreaded hole; the top port of the lead-in through hole is provided with a guide chamfer. The rivet fastener is simple in structure, easy to form, free of secondary pressing, stable and reliable in riveting performance, low in cost and high in machining and assembling efficiency.
Description
Technical Field
The utility model belongs to the technical field of fastener manufacturing, and particularly relates to a rivet fastener of an automobile combined structure.
Background
With the development of the light weight technology of the automobile, the light weight can be realized by adopting the aluminum alloy material and more non-metal composite parts on the automobile body, so that the mass of the automobile body is reduced, and the effects of better energy conservation and environmental protection are achieved. Meanwhile, the rivet-pulling type fastener improves the connection mode of mounting parts on thin plates, thick plates in a specific range and closed plates.
The blind rivet fastener allows the use of a blind rivet gun for blind rivet connections, which is suitable for use in a variety of applications where blind riveting is not practical. When the rivet fastening piece is used, internal threads do not need to be tapped and welded, only a pneumatic or manual rivet gun is needed, and one-time riveting can be carried out, so that the rivet fastening piece is convenient and efficient.
The rivet fastener with the integrated structure has the advantages of complex structure, difficulty in processing and high cost, and internal threads are required to be tapped by cutting materials sometimes. At present, mostly be the rivet fastener of integrated form, as shown in fig. 9, use the screw thread to come connecting bolt 1 and nut 2, the inefficiency just still need carry out the secondary suppression and make inside and outside screw thread produce interference phenomenon to this effect that reaches the tight fit guarantees the stability of its combination, and the screw thread is not hard up when preventing to rivet, and bolt 1 drops, but the secondary suppression can lead to the rise of processing cost.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a rivet fastener. The rivet fastener is simple in structure, easy to form, free of secondary pressing, stable and reliable in riveting performance, low in cost and high in machining and assembling efficiency.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a rivet fastener comprises a bolt and a riveting shell, wherein the bolt is in transition fit or interference fit in the riveting shell; wherein the content of the first and second substances,
the bolt comprises a first external thread part, a first guide section, a second external thread part and a second guide section which are sequentially connected into a whole; the first guide section is connected with the first external thread part and the second external thread part; the external threads of the first external thread part and the external threads of the second external thread part have opposite rotation directions; when the external thread of the first external thread part is a left-handed external thread, the external thread of the second external thread part is a right-handed external thread; when the external thread of the first external thread part is a right-handed external thread, the external thread of the second external thread part is a left-handed external thread; the nominal diameter of the first external thread part is larger than that of the second external thread part;
the riveting shell is characterized in that an inner cavity of the riveting shell is provided with a lead-in through hole, the upper half part of the lead-in through hole is an internal threaded hole, and the lower half part of the lead-in through hole is a unthreaded hole; the top port of the lead-in through hole is provided with a guide chamfer.
The rivet fastener is characterized in that the bolt is made of carbon steel, aluminum alloy, copper, titanium alloy or magnesium alloy; the riveting shell is made of carbon steel, aluminum alloy, copper, titanium alloy or magnesium alloy.
The rivet fastener is characterized in that the first guide section is in a frustum shape formed by gradually reducing from the bottom of the first external thread part to the top of the second external thread part; the second guide section is in a frustum shape formed by downwards tapering from the bottom of the second external thread part.
According to the rivet fastener, the outer cavity wall of the riveting shell is provided with the deformation part and the supporting part at the position corresponding to the unthreaded hole, the deformation part and the supporting part are arranged on the outer cavity wall from top to bottom, the supporting part is step-shaped, and the diameter of the step-shaped supporting part is larger than that of the deformation part.
The technical scheme provided by the above has the following beneficial effects:
firstly, the bolt of the rivet fastener is in transition fit or interference fit with the riveting shell, so that the rivet fastener is simple in structure, secondary pressing is not needed, the processing and assembling efficiency is effectively improved, and the cost is reduced.
Secondly, the first external thread part and the second external thread part of the bolt adopt external threads with opposite rotation directions, when the second external thread part is screwed by the hand riveter, the first external thread part can rotate in the screwing direction, so that the bolt is not easy to fall off, and the stability of the riveting performance of the hand riveter fastener is well ensured.
Thirdly, the second external thread part of the bolt is provided with external threads, so that the bolt is convenient for screwing in and connecting a riveting gun, and also provides a function that the second external thread part extends out of a plate to be processed and can be used as a connecting screw.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a perspective view of the bolt of the present invention;
FIG. 2 is a schematic perspective view of a riveted joint housing of the utility model;
FIG. 3 is a cross-sectional structural schematic view of the riveted joint housing of the utility model;
FIG. 4 is a schematic perspective view of the blind rivet fastener of the present invention prior to riveting;
FIG. 5 is a cross-sectional schematic view of the blind rivet fastener of the present invention prior to riveting;
FIG. 6 is a schematic perspective view of a rivet fastener in accordance with the present invention in a riveted combination;
FIG. 7 is a cross-sectional view of a rivet fastener in a riveting combination according to the utility model;
FIG. 8 is an enlarged view of the portion C of FIG. 7 (D is an interference phenomenon caused by the internal and external threads);
FIG. 9 is a schematic structural view of a prior art bolt (arrow a in the drawing indicates a clockwise tightening direction; arrow b in the drawing indicates a clockwise tightening direction);
fig. 10 is a schematic structural view of the bolt of the present invention (arrow a in the drawing indicates a counterclockwise tightening direction, and arrow B in the drawing indicates a clockwise tightening direction).
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.
In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" or "fixedly connected" should be interpreted broadly, that is, any connection between the two that does not have a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.
In the claims, the specification and the drawings of the present invention, the terms "including", "having" and their variants, if used, are intended to be inclusive and not limiting.
Referring now to fig. 1 to 8, a blind rivet fastener of the present invention is illustrated, comprising a bolt 100 and a rivet housing 200, the bolt 100 being transition-fitted or interference-fitted in the rivet housing 200. In this embodiment, the bolt 100 and the riveting housing 200 may be made of carbon steel, aluminum alloy, copper, titanium alloy or magnesium alloy, and are particularly suitable for the rivet fastener with the riveting housing 200 made of soft material.
The bolt 100 of the present invention includes a head 110, a first male screw portion 120, a first guide section 130, a second male screw portion 140, and a second guide section 150, which are sequentially connected as one body.
The inventive head 110 has a larger diameter than the first threaded portion 120.
The first guide section 130 of the present invention connects the first male screw portion 120 and the second male screw portion 140. The first guide section 130 is formed in a tapered shape gradually decreasing from the bottom of the first male screw portion 120 to the top of the second male screw portion 140.
The second guide section 150 of the present invention is formed in a truncated cone shape which is tapered downward from the bottom of the second external thread part 140.
The external thread of the first external thread part 120 of the present invention is a left-hand external thread or a right-hand external thread.
The external thread of the second external thread part 140 of the present invention has a reverse direction to the external thread of the first external thread part 120, that is, when the external thread of the first external thread part 120 is a left-hand external thread, the external thread of the second external thread part 140 is a right-hand external thread; when the external thread of the first external thread part 120 is a right-handed external thread, the external thread of the second external thread part 140 is a left-handed external thread. And the first male screw portion 120 has a nominal diameter greater than that of the second male screw portion 140.
In the present embodiment, the bolt 100 has a total length of 32 to 34mm, wherein the external thread of the first external thread portion 120 connected to the head portion 110 is an M8 left-handed external thread having a length of 9.5 to 10.5 mm. The diameter of the head 110 is phi 8-9.5 mm, and the head can be designed to be triangular, polygonal and the like.
The external thread of the second external thread part 140 in this embodiment is a right-handed external thread with a length of 10-12 mm. The diameter of the bottom of the second guide section 150 connected to the bottom of the second external thread part 140 is 4.2 to 4.9 mm. The second external thread part 140 does not participate in the process of combining with the riveting shell 200, and the main function of the second external thread part is only to extend out of the external thread part with a certain length, so that the external thread part can be connected with a riveting gun during riveting, therefore, the length and the thread size of the second external thread part 140 are changed according to different design requirements, and the extension length is enough for clamping the riveting gun after the second external thread part is combined with the riveting shell 200.
The inner cavity of the riveting housing 200 of the utility model is provided with a lead-in through hole 210, the upper half part of the lead-in through hole 210 is an internal thread hole 211, and the lower half part of the lead-in through hole 210 is a unthreaded hole 212. The outer cavity wall of the riveting housing 200 is provided with a deformation part 220 and a support part 230 at a position corresponding to the light hole 212, the deformation part 220 and the support part 230 are arranged on the outer cavity wall from top to bottom, the support part 230 is step-shaped, and the diameter of the step-shaped support part 230 is larger than that of the deformation part 220.
The top port of the inventive lead-in through hole 210 is provided with a guide chamfer 213.
Before riveting, the bolt 100 is inserted into the rivet housing 200 through the introduction through hole 210, and the second guide section 150 is abutted against the upper end face of the guide chamfer 211 of the introduction through hole 210 of the rivet housing 200.
In the rivet combination, the first externally threaded portion 120 of the bolt 100 is in transition fit or interference fit with the internally threaded bore 211 of the rivet housing 200. When the first external thread part 120 is in interference fit with the internal thread hole 211, the fit tolerance of the pitch diameter of the thread is recommended (2H/3 m); when the first external thread part 120 and the internal thread hole 211 are in transition fit, the fit tolerance of the thread pitch diameter is recommended (4H/2 km); and the torque for screwing the first male screw portion 120 into and out of the female screw hole 211 is preferably greater than 1 nm.
When the first external thread portion 120 of the bolt 100 of the present invention is in transition fit or interference fit with the internal thread hole 211 of the rivet housing 200, interference occurs at the thread, as shown in fig. 8, a radial friction force provides a sufficient torque, a shear force between axial thread ridges provides a sufficient pull-off strength, and the bolt 100 and the rivet housing 200 are combined into a whole; need not the secondary and press and put, effectual processing and the packaging efficiency that has promoted, the cost is reduced, and the stability of riveting performance also can obtain fine assurance.
Most of the thread designs in the prior art are right-handed threads, as shown in fig. 9, the upper outer thread 11 and the lower outer thread 12 of the bolt 1 of the common rivet fastener are right-handed threads and are screwed up clockwise. When the lower external thread 12 is screwed by the hand riveter, the upper external thread 11 rotates in the unscrewing direction, the bolt 1 can be loosened, and the falling risk is caused. The same principle is used when the tail part is connected with other parts after riveting.
As shown in fig. 10, in the bolt 100 of the blind rivet fastener according to the present invention, the external thread of the first external thread portion 120 is left-handed, and the external thread of the second external thread portion 140 is right-handed. When the first male screw portion 120 is screwed counterclockwise, the second male screw portion 140 is screwed clockwise. When the second external thread portion 140 is tightened by the riveter, the first external thread portion 120 rotates in the tightening direction, so that the bolt 100 is not easily detached. The same principle is used when the tail part is connected with other parts after riveting.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (5)
1. The rivet fastener is characterized by comprising a bolt (100) and a riveting shell (200), wherein the bolt (100) is in transition fit or interference fit in the riveting shell (200); wherein the content of the first and second substances,
a bolt (100) including a first male screw part (120), a first guide section (130), a second male screw part (140), and a second guide section (150) which are connected in sequence as a single body; the first guide section (130) connects the first external thread part (120) and the second external thread part (140); the external thread of the first external thread part (120) and the external thread of the second external thread part (140) are opposite in rotation direction; when the external thread of the first external thread part (120) is a left-hand external thread, the external thread of the second external thread part (140) is a right-hand external thread; when the external thread of the first external thread part (120) is a right-handed external thread, the external thread of the second external thread part (140) is a left-handed external thread; and the first external thread portion (120) has a nominal diameter greater than the nominal diameter of the second external thread portion (140);
the riveting shell (200), wherein an inner cavity of the riveting shell (200) is provided with a lead-in through hole (210), the upper half part of the lead-in through hole (210) is an internal threaded hole (211), and the lower half part of the lead-in through hole (210) is a unthreaded hole (212); a guide chamfer (213) is provided at the top end of the introduction through hole (210).
2. A blind rivet fastener according to claim 1, characterized in that the bolt (100) is a bolt made of carbon steel, aluminum alloy, copper, titanium alloy or magnesium alloy; the riveting shell (200) is made of carbon steel, aluminum alloy, copper, titanium alloy or magnesium alloy.
3. A blind rivet fastener according to claim 1 or 2, wherein the first guide section (130) is formed in a tapered shape which is tapered from the bottom of the first male screw portion (120) to the top of the second male screw portion (140); the second guide section (150) is tapered from the bottom of the second external thread portion (140) to the bottom.
4. A blind rivet fastener according to claim 1 or 2, characterized in that the outer cavity wall of the rivet housing (200) is provided with a deformation portion (220) and a support portion (230) at a position corresponding to the unthreaded hole (212), the deformation portion (220) and the support portion (230) are arranged on the outer cavity wall from top to bottom, and the support portion (230) is stepped, and the diameter of the stepped support portion (230) is larger than that of the deformation portion (220).
5. A blind rivet fastener according to claim 3, characterized in that the outer cavity wall of the rivet housing (200) is provided with a deformation portion (220) and a support portion (230) at a position corresponding to the unthreaded hole (212), the deformation portion (220) and the support portion (230) are arranged on the outer cavity wall from top to bottom, and the support portion (230) is stepped, and the diameter of the stepped support portion (230) is larger than that of the deformation portion (220).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121797680.6U CN216241755U (en) | 2021-08-03 | 2021-08-03 | Rivet fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121797680.6U CN216241755U (en) | 2021-08-03 | 2021-08-03 | Rivet fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216241755U true CN216241755U (en) | 2022-04-08 |
Family
ID=80979673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121797680.6U Active CN216241755U (en) | 2021-08-03 | 2021-08-03 | Rivet fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216241755U (en) |
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2021
- 2021-08-03 CN CN202121797680.6U patent/CN216241755U/en active Active
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