A self-fixing rivet

Abstract

The present invention relates to a self-fixing rivet comprising a rivet body and a mandrel. The rivet body comprises a body tube and a head at the bottom end of the body tube. The mandrel comprises a mandrel rod and a head at the top end of the mandrel rod. The mandrel rod is provided with a fracture groove. The body tube is provided with a body hole extending to the head. The body tube comprises a connecting portion whose inner wall is pressed into the fracture groove, an upper portion of the body tube located above the connecting portion, and a lower portion of the body tube located below the connecting portion. A gap is defined between the end face of the body tube and the mandrel head. The self-fixing rivet of the present invention can connect riveted parts spaced apart.

Description

Technical Field

[0001] The present invention relates to a rivet, in particular to a self-fixing rivet. Background Art

[0002] Rivets are widely used across a wide range of industries due to their ease of use. Riveting technology and tools are becoming increasingly sophisticated, allowing them to be used in a variety of specialized applications. Rivets have become an effective and stable mechanical connector. Regardless of the application, existing rivets are typically used to connect two or more closely fitting parts. They utilize their deformation to connect multiple parts, ensuring that adjacent surfaces remain tightly fitted after riveting.

[0003] With the development of industry, riveting is becoming increasingly common, not only for connecting closely fitting parts, but also for securing separate workpieces. This type of securing requires a certain distance between the workpieces after they are connected, rather than a tight fit. Existing rivets are not suitable for these riveting situations, necessitating the design of a new self-securing rivet to achieve these workpiece riveting operations. Summary of the Invention

[0004] In order to solve the above technical problems, an object of the present invention is to provide a self-fixing rivet capable of connecting riveted parts with a certain interval.

[0005] The self-fixing rivet of the present invention includes a nail body and a nail core. The nail body includes a nail body tube and a nail body head at the bottom end of the nail body tube. The nail core includes a nail core rod and a nail core head at the top end of the nail core rod. The nail core rod is provided with a fracture groove. The nail body tube is provided with a nail body hole extending to the nail body head. The nail body tube includes a connecting portion whose inner wall is pressed into the fracture groove, an upper portion of the nail body tube located above the connecting portion, and a lower portion of the nail body tube located below the connecting portion. There is a gap between the end face of the nail body tube and the nail core head.

[0006] The advantage of this self-fixing rivet lies in that the portion of the inner wall of the nail body tube corresponding to the fracture groove, namely the connecting portion, is pressed into the fracture groove, and a gap is provided between the end face of the nail body tube and the mandrel head. Thus, the mandrel rod is connected to the nail body tube through the connecting portion of the nail body tube. When pulled by a rivet gun, the mandrel rod can apply pressure to the lower portion of the nail body tube through the connecting portion, causing it to expand and deform, and pressing the first connected member below it against the nail body head. Simultaneously, the mandrel head can press the second connected member against the deformed upper portion of the nail body tube, thereby allowing the first and second connected members to be separated by a certain distance after riveting, ultimately achieving a spaced riveting connection.

[0007] A plurality of connecting grooves are arranged on the outer wall of the nail body tube.

[0008] The arrangement of multiple connecting grooves makes it easier for the nail body tube to expand and deform after being compressed.

[0009] The depth of the multiple connection grooves gradually becomes shallower from the nail body head to the end of the nail body tube.

[0010] This arrangement makes the portion of the nail body tube close to the nail body head easier to deform. In this way, under the action of the rivet gun, the nail body tube can be deformed in sequence from the nail body head to the end of the nail body tube, thereby realizing the sequential compression riveting of the first connected part and the second connected part.

[0011] The nail body hole is a truncated cone hole starting from the nail body head and with a gradually decreasing hole diameter.

[0012] This arrangement makes it easier for the connecting portion of the nail body tube to be pressed into the fracture groove, while at the same time making it easier for the lower portion of the nail body tube to be deformed.

[0013] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement them in accordance with the contents of the specification, the embodiments of the present invention are described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of a self-fixing rivet;

[0015] Figure 2 is a cross-sectional view of a self-retaining rivet;

[0016] Figure 3 yes Figure 1 The main view of the nail body;

[0017] Figure 4 yes Figure 2 A cross-sectional view of a nail body;

[0018] Figure 5 It is a front view of a nail body having a double trapezoidal connecting groove;

[0019] Figure 6 This is a partial structural diagram of the nail core;

[0020] Figure 7 This is a diagram of the usage status of custom rivets.

[0021] In the figure, the nail body 1, the nail core 2, the nail body tube 3, the nail body head 4, the nail core rod 5, the nail core head 6, the fracture groove 7, the nail body hole 8, the connecting part 9, the upper part of the nail body tube 10, the lower part of the nail body tube 11, the first connected part 12, the second connected part 13, and the connecting groove 14. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention. Example

[0023] See also Figures 1 to 7 The self-fixing rivet of this embodiment includes a nail body 1 and a nail core 2. The nail body includes a nail body tube 3 and a nail body head 4 at the bottom end of the nail body tube. The nail core includes a nail core rod 5 and a nail core head 6 at the top end of the nail core rod. The nail core rod is provided with a fracture groove 7. The nail body tube is provided with a nail body hole 8 extending to the nail body head. The nail body tube includes a connecting portion 9 whose inner wall is pressed into the fracture groove, an upper portion 10 of the nail body tube located above the connecting portion, and a lower portion 11 of the nail body tube located below the connecting portion. There is a gap between the end face of the nail body tube and the nail core head.

[0024] In the self-fixing rivet of the present invention, the portion of the inner wall of the rivet tube corresponding to the fracture groove, namely the connecting portion, is pressed into the fracture groove, and a gap is provided between the end face of the rivet tube and the mandrel head. Thus, the mandrel rod is connected to the rivet tube through the connecting portion. When pulled by a rivet gun, the mandrel rod can apply pressure to the lower portion of the rivet tube through the connecting portion, causing it to expand and deform, and pressing the first connected member below it against the rivet head. Simultaneously, the mandrel head can press the second connected member against the deformed upper portion of the rivet tube, thereby allowing the first and second connected members to be separated by a certain distance after riveting, ultimately achieving a spaced riveting connection.

[0025] The gap set between the end face of the nail body tube and the nail core head enables the connecting part to first apply pressure to the lower part of the nail body tube to cause it to expand and deform, and then the nail core head applies pressure to the upper part of the nail body tube to cause it to expand and deform, thereby completing the compression riveting of the first connected part and the second connected part in sequence.

[0026] The following is the preparation method and specific working principle of the self-fixing rivet.

[0027] The operator first inserts the mandrel into the hole of the nail tube, leaving a certain gap between the end of the tube and the mandrel head. This gap is relatively small, around 0.5 mm in practice, as long as the connection can first drive the lower part of the nail tube to expand and deform.

[0028] The nail body hole can be cylindrical or variable diameter. In this embodiment, the nail body hole is a truncated conical hole with a gradually decreasing diameter starting from the nail body head. The core rod is a cylindrical rod with an outer diameter adapted to the top of the nail body hole. This makes it easier for the connecting portion of the nail body tube to be pressed into the fracture groove and the lower portion of the nail body tube to deform more easily.

[0029] The fracture groove may be formed by being surrounded by two truncated cones connected at their end faces.

[0030] After the nail body tube and the mandrel are assembled, the operator uses a punching device to punch a connecting groove 14 on the outer wall of the nail body tube so that the connecting portion of the nail body tube is pressed into the fracture groove of the mandrel, thereby connecting the nail body tube and the mandrel at the fracture groove. In practice, the number of connecting grooves and the spacing between adjacent connecting grooves can be adjusted adaptively based on parameters such as the specific spacing distance of the connected parts.

[0031] In order to make the nail body tube easier to deform, multiple connection grooves can also be punched on the upper and lower sides of the nail body tube connection part to reduce the thickness of the nail body tube at the connection groove, making it easier to expand and deform after being compressed.

[0032] The cross section of the connecting groove can be a rectangular, trapezoidal, double trapezoidal structure, etc. It is preferably a double trapezoidal structure, that is, the cross section of the connecting groove consists of two isosceles trapezoids connected in sequence.

[0033] After the connecting portion of the nail body tube is pressed into the fracture groove, the operator can pass the nail body together with the nail core through the connecting holes of the first connected member 12 and the second connected member 13 .

[0034] The operator then uses a rivet gun to pull the mandrel, which, under the pull of the rivet gun, presses the lower portion of the nail body tube through the connecting portion pressed into the fracture groove, causing it to expand and deform until the expanded and deformed lower portion of the nail body tube presses the first connected part tightly against the nail body head.

[0035] The mandrel then continues to move under the action of the rivet gun. As the tension gradually increases, the connecting portion of the nail tube gradually breaks free from the fracture groove. Once the mandrel head contacts the end face of the nail tube, the rivet gun applies pressure to the upper portion of the nail tube, causing it to gradually expand and deform until the second connected member is compressed between the deformed nail tube and the mandrel head.

[0036] After the first and second connected parts are both compressed, the tension on the mandrel gradually increases due to the action of the rivet gun until it breaks at the fracture groove, thus completing the riveting of the first and second connected parts. After riveting, the first and second connected parts are compressed between the mandrel head and the nail body head, and the first and second connected parts are separated by the deformed nail body tube.

[0037] Preferably, in the self-fixing rivet of this embodiment, the depth of the multiple connecting grooves gradually becomes shallower from the rivet head toward the end of the rivet tube.

[0038] This arrangement makes the portion of the nail body tube close to the nail body head easier to deform. In this way, under the action of the rivet gun, the nail body tube can be deformed in sequence from the nail body head to the end of the nail body tube, thereby realizing the sequential compression riveting of the first connected part and the second connected part.

[0039] The above are only preferred embodiments of the present invention, which are used to assist those skilled in the art to implement the corresponding technical solutions, and are not used to limit the scope of protection of the present invention, which is defined by the appended claims. It should be pointed out that for those skilled in the art, a number of equivalent improvements and variations can be made based on the technical solutions of the present invention, and these improvements and variations should also be regarded as the scope of protection of the present invention. At the same time, it should be understood that although this specification is described in accordance with the above-mentioned embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions of each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-fixing rivet, comprising a rivet body (1) and a rivet core (2), wherein the rivet body comprises a rivet body tube (3) and a rivet body head (4) at the bottom end of the rivet body tube, the rivet core comprises a rivet core rod (5) and a rivet core head (6) at the top end of the rivet core rod, the rivet core rod is provided with a fracture groove (7), and the rivet body tube is provided with a rivet body hole (8) extending to the rivet body head, characterized in that: The nail body tube comprises a connecting portion (9) whose inner wall is pressed into the fracture groove, an upper portion of the nail body tube (10) located above the connecting portion, and a lower portion of the nail body tube (11) located below the connecting portion, with a gap between the end face of the nail body tube and the nail core head; A plurality of connecting grooves (14) are provided on the outer wall of the nail body tube; The depth of the multiple connection grooves gradually becomes shallower from the nail body head to the end of the nail body tube; The nail body hole is a truncated conical hole starting from the nail body head and with a gradually decreasing hole diameter; Under the pull of the rivet gun, the mandrel applies pressure to the lower portion of the nail body tube through the connecting portion pressed into the fracture groove, causing it to expand and deform, until the expanded and deformed lower portion of the nail body tube presses the first connected member tightly against the nail body head; Then, the mandrel rod continues to move under the action of the rivet gun. As the pulling force gradually increases, the connecting portion of the nail body tube gradually falls off from the fracture groove. After the mandrel head contacts the end face of the nail body tube, the mandrel head exerts pressure on the upper portion of the nail body tube under the action of the rivet gun, and the upper portion of the nail body tube gradually expands and deforms until the second connected member is pressed between the deformed nail body tube and the mandrel head. After riveting, the first connected member and the second connected member are pressed between the nail core head and the nail body head, and the first connected member and the second connected member are spaced apart by the deformed nail body tube.

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