Anti-loosening pressing rivet nut

Abstract

The utility model discloses an anti-loosing pressing rivet nut in the field of pressing rivet nuts, which comprises a nut body, one end of the nut body is provided with a first protruding part protruding upwards, one end of the first protruding part far away from the nut body is provided with a second protruding part protruding upwards, the nut body, the first protruding part and the second protruding part are coaxially arranged, and the nut body is provided with a nut opening. Embossing teeth are arranged on the side face of the first protruding part in the circumferential direction, a guide groove is formed in the side face of the second protruding part in the circumferential direction, a plurality of communicated mounting holes are formed in the nut body, locked screws are inserted into the mounting holes, and the tail ends of the screws eject out of the outer surface of the nut body. By means of the structure that the knurling teeth are matched with the guide grooves, the firm locking effect formed by guiding a plate to flow in the installation process is enhanced, in addition, the screw rod which is locked with the plate at the same time is additionally arranged on the nut body, the fastening force between the nut body and the plate is further enhanced, the stability and durability of connection are integrally improved, and the looseness condition is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of press-fit nuts, specifically a press-fit nut designed to prevent loosening. Background Technology

[0002] In sheet metal joining technology, press-fit nuts are widely used as important fastening components in various fields such as automotive manufacturing, aerospace, and electronic equipment. Press-fit nuts are pressed into pre-punched metal sheets, utilizing the interference fit between the nut and the pressed-in sheet to form a secure connection. However, in practical applications, traditional press-fit nuts pose a risk of loosening when used on sheet metal.

[0003] To address the loosening issue, various improvements have been implemented in existing technologies, such as adding knurled teeth to the press-fit nut, using a specially shaped nut body, and applying a locking agent between the nut and the sheet metal. However, these measures still cannot completely prevent the press-fit nut from loosening under certain extreme working conditions, and after prolonged use, the press-fit nut may still fall off. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a non-loosening press-fit nut, which can effectively solve the technical problem that press-fit nuts are prone to loosening.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A locking nut for preventing loosening includes a nut body. One end of the nut body has an upwardly protruding first protrusion, and the end of the first protrusion away from the nut body has an upwardly protruding second protrusion. The nut body, the first protrusion, and the second protrusion are coaxially arranged. The side of the first protrusion has knurled teeth along the circumferential direction, and the side of the second protrusion has a guide groove along the circumferential direction. The nut body has a plurality of through mounting holes distributed around the periphery of the first protrusion. A locking screw is inserted into the mounting holes, and the end of the screw protrudes out of the outer surface of the nut body.

[0007] Furthermore, the widths of the nut body, the first protrusion, and the second protrusion gradually decrease, and a central threaded hole penetrating the second protrusion is provided in the middle of the nut body.

[0008] Furthermore, the central screw hole has an inclined surface at one end near the nut body, and the inclined surface forms a certain angle with the outer surface of the nut body.

[0009] Furthermore, the nut body has several mounting grooves that communicate with the corresponding mounting holes, and the head of the screw is fixed in the mounting groove.

[0010] Furthermore, the guide groove has a polygonal cross-section, and the top opening of the guide groove is wider than the bottom opening.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This utility model enhances the flow of the sheet material during installation by using a combination of embossed teeth and guide grooves to form a firm locking effect. In addition, a screw that locks with the sheet material is added to the nut body to further enhance the fastening force between the nut and the sheet material. Overall, this improves the stability and durability of the connection and effectively prevents loosening. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure from the top of an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the overall structure from the bottom direction of an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the top direction of the rivet nut after the screw is removed in an embodiment of this utility model;

[0016] Figure 4 This is a schematic diagram of the bottom direction of the rivet nut after the screw is removed in an embodiment of this utility model;

[0017] Numbering on the map:

[0018] 1-Nut body, 2-First protrusion, 3-Second protrusion, 4-Knurled teeth, 5-Guide groove, 6-Mounting hole, 7-Screw, 8-Center screw hole, 9-Inclined surface, 10-Mounting groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-4 As shown, this utility model discloses an anti-loosening press-fit nut, mainly used as a fastener on thin plates, sheet metal, and other sheet materials. Pressure forces the knurled teeth 4 of the press-fit nut into the plate, causing plastic deformation around the pre-drilled hole. The deformed material is squeezed into the guide groove 5, thereby creating a locking effect. In this technical solution, a screw 7 further reinforces the fixation within the press-fit nut, improving its anti-loosening effect.

[0021] The structure of the press-fit nut mainly includes a nut body 1, and a first protrusion 2 that protrudes upward at one end of the nut body 1. A second protrusion 3 that protrudes upward at the end of the first protrusion 2 away from the nut body 1 is formed, thus creating a multi-layered protrusion structure. Moreover, the nut body 1, the first protrusion 2 and the second protrusion 3 are coaxially arranged, and the widths of the nut body 1, the first protrusion 2 and the second protrusion 3 gradually decrease.

[0022] However, each protrusion has a corresponding function. The first protrusion 2 has embossed teeth 4 along its circumferential direction on its side, and the second protrusion 3 has guide grooves 5 along its circumferential direction on its side. The guide grooves 5 are typically located around the embossed teeth 4. During use, the embossed teeth 4 are pressed into pre-drilled holes in the sheet metal. Under pressure, the teeth are squeezed into the sheet metal, causing plastic deformation around the pre-drilled holes. The deformed material is squeezed into the guide grooves, thus creating a locking effect. The guide grooves 5 also play a limiting role during the riveting process. When the embossed teeth 4 are pressed into the sheet metal, the guide grooves 5 can restrict excessive movement of the embossed teeth 4, thereby ensuring that the nut is firmly fixed to the sheet metal.

[0023] The guide groove 5 has a polygonal cross-section, and the top opening of the guide groove 5 is wider than the bottom opening. The guide groove 5 better guides the installation tool, ensuring that the nut is accurately pressed into the predetermined position during installation, reducing errors and improving installation accuracy. Furthermore, the larger top opening distance of the guide groove 5 makes it easier for deformed parts of the sheet metal to be squeezed into the guide groove during riveting, thereby enhancing the locking effect and helping to prevent the nut from loosening or falling off during use.

[0024] To further enhance the stability of the press-fit nut and prevent loosening, several through mounting holes 6 are provided in the nut body 1, and a locking screw 7 is inserted into the mounting holes 6. The end of the screw protrudes from the outer surface of the nut body 1 to be inserted into the plate for locking and reinforcing the connection.

[0025] Mounting holes 6 are distributed in a ring around the periphery of the first protrusion 2, and a mounting groove 10 is provided at the position where the screw 7 is mounted on the nut body 1, which is connected to the corresponding mounting hole 6. The head of the screw 7 is fixed in the mounting groove 10. During installation, the shank of the screw 7 is locked in the mounting hole 6 and pushed out to be fixed to the plate, while the head of the screw 7 falls into the mounting groove 10 and is hidden.

[0026] A central threaded hole 8 is provided in the middle of the nut body 1, which penetrates the second protrusion 3. The central threaded hole 8 is used to cooperate with the corresponding bolt for bolt insertion and fixing. When inserting the bolt, in order to facilitate bolt insertion, an inclined surface 9 is provided at one end of the central threaded hole 8 near the nut body 1. The inclined surface 9 forms a certain angle with the outer surface of the nut body 1, allowing the bolt to slide along the inclined surface 9 into the central threaded hole 8 for connection.

[0027] Compared with traditional technology, this technical solution strengthens the flow of the plate during installation by using the structure of embossed teeth 4 and guide groove 5 to form a firm locking effect. In addition, a screw 7 is added to the nut body 1 to lock with the plate at the same time, which further enhances the fastening force between the nut and the plate. Overall, the stability and durability of the connection are improved, and loosening is effectively avoided.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A locking nut for preventing loosening, comprising a nut body, characterized in that: One end of the nut body is provided with an upwardly protruding first protrusion, and the end of the first protrusion away from the nut body is provided with an upwardly protruding second protrusion. The nut body, the first protrusion, and the second protrusion are coaxially arranged. The side of the first protrusion is provided with knurled teeth in the circumferential direction, and the side of the second protrusion is provided with a guide groove in the circumferential direction. The nut body is provided with a plurality of through mounting holes, which are distributed around the periphery of the first protrusion. A locking screw is inserted into the mounting hole, and the end of the screw protrudes out of the outer surface of the nut body.

2. The anti-loosening press-fit nut according to claim 1, characterized in that: The width of the nut body, the first protrusion, and the second protrusion gradually decreases, and a central screw hole that penetrates the second protrusion is provided in the middle of the nut body.

3. The anti-loosening press-fit nut according to claim 2, characterized in that: The central screw hole has an inclined surface at one end near the nut body, and the inclined surface forms a certain angle with the outer surface of the nut body.

4. The anti-loosening press-fit nut according to claim 1, characterized in that: The nut body has several mounting grooves that communicate with the corresponding mounting holes, and the head of the screw is fixed in the mounting groove.

5. A locking nut for preventing loosening according to any one of claims 1-4, characterized in that: The guide groove has a polygonal cross-section, and the top opening of the guide groove is wider than the bottom opening.

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