Anti-loose type press-in rivet nut

Abstract

The utility model relates to the technical field of press-in nuts, and particularly discloses a lock type press-in nut, which comprises a barrel (10), an anti-skid piece (20) arranged on the barrel (10), and a guide piece (30) arranged on the anti-skid piece (20). The barrel (10) is internally provided with an internal thread (40), and the tooth base of the internal thread (40) is an R-shaped surface. The utility model is provided with an anti-skid piece on the barrel. The anti-skid piece is of a toothed structure. After installation, the anti-skid piece and the base plate are engaged through the toothed structure. The frictional force is much greater than the sliding friction between the existing press-in nut and the base plate, so that loosening between the anti-skid piece and the base plate is prevented. Meanwhile, the lock type press-in nut is internally provided with an internal thread in the barrel, and the tooth base of the internal thread is an R-shaped surface. When the external thread of the bolt and the R-shaped internal thread are tightened, the tooth tip of the external thread tightly abuts against the R-shaped surface, thereby generating a large locking force, and preventing loosening between the barrel and the bolt.

Description

Technical Field

[0001] This utility model relates to the field of press-fit nut technology, and in particular to an anti-loosening press-fit nut. Background Technology

[0002] A press-fit nut is a nut with pre-drilled threads and a special riveting structure. It is plastically deformed under pressure through a press-fit process, thus being securely riveted to a pre-drilled base plate. After installation, a flat threaded hole is formed on the other side (back side) of the base plate, which can be used to connect other parts.

[0003] During prolonged use, existing press-fit nuts are prone to loosening between the press-fit nut, the base plate, and the bolt, which can cause installed objects to become loose or even fall off, posing a safety hazard. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an anti-loosening compression rivet nut.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] The anti-loosening compression rivet nut includes: a cylindrical body, an anti-slip component disposed on the cylindrical body, and a guide component disposed on the anti-slip component; the cylindrical body is provided with an internal thread, and the root of the internal thread is an R-shaped surface; the anti-slip component and the guide component form a compression rivet structure.

[0007] Preferably, the anti-slip component has a toothed structure to increase friction with the substrate.

[0008] Preferably, the guide is a conical structure, which has the functions of positioning and flaring.

[0009] Compared with the prior art, this application has the following beneficial effects:

[0010] This invention features an anti-slip component on the cylinder body. This anti-slip component has a toothed structure. After installation, the anti-slip component engages with the base plate through the toothed mesh, resulting in a frictional force far greater than the sliding friction between the existing press-fit nut and the base plate, thus preventing loosening between the anti-slip component and the base plate. Simultaneously, this anti-loosening press-fit nut has an internal thread inside the cylinder body, and the root of the internal thread is an R-shaped surface. When the external thread of the bolt is tightened with the R-shaped internal thread, the tip of the external thread presses tightly against the R-shaped surface, thereby generating a large locking force and preventing loosening between the cylinder body and the bolt. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0012] Figure 1 This is a three-dimensional structural diagram of the blind hole of the anti-loosening compression rivet nut of this utility model;

[0013] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0014] Figure 3 for Figure 1 A three-dimensional structural diagram. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. They 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.

[0018] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0019] Example 1:

[0020] like Figures 1 to 3 As shown, the anti-loosening compression rivet nut includes: a cylindrical body 10; an anti-slip member 20 disposed on the cylindrical body 10, the anti-slip member 20 having a toothed structure; a guide member 30 disposed on the anti-slip member 20, the guide member 30 having a conical structure; the cylindrical body 10 has an internal thread 40 inside, and the root of the internal thread 40 is an R-shaped surface; the anti-slip member 20 and the guide member 30 form a compression rivet structure.

[0021] The anti-loosening compression rivet nut is an internal thread fastener that is riveted to the base plate by causing the guide 30 to undergo plastic deformation under pressure and the guide 30 to expand under the extrusion force.

[0022] The conical structure of the guide 30 can accommodate and wrap more substrate area when the riveting expands, thereby increasing the push-out force after riveting. Before installation, the anti-loosening pressure expansion nut can be inserted into the pre-made hole of the substrate through the guide 30 to accurately position the relative position of the product and the substrate.

[0023] Among them, the anti-slip part 20 has a concave-convex structure, which can increase the surface area. In this embodiment, a toothed structure is adopted, which can effectively cut and break the material during riveting. During extrusion, the material flows inward along the inclined surface, resulting in fuller extrusion and greater twisting force. After riveting, a toothed structure is also formed at the contact position between the substrate and the anti-slip part 20, and it meshes with the anti-slip part 20, which improves the friction between the substrate and the anti-slip part 20, thereby preventing the substrate and the anti-slip part 20 from becoming loose during use.

[0024] The cylinder 10 has an internal thread 40, which is supported by a 30-degree angle with existing metric or American standard threads or a 27.5-degree angle with British standard threads. The internal thread 40 of the cylinder 10 adopts an R-shaped surface root, so that the normal force generated by the contact between the threads and the bolt axis is partially supported by the R-shaped surface. When the external thread of the bolt and the R-shaped internal thread 40 are pre-tightened, the tip of the external thread slightly retracts and presses against the R-shaped surface. This can effectively protect the tip of the external thread and reduce the damage of lateral force to the external thread. At this time, the tip of the external thread is tightly pressed against the R-shaped surface, thereby generating a large locking force, which can be effectively applied to the shank of the external thread fastener. The normal pressure of the R-shaped internal thread is much greater than the tightening pressure. Therefore, the friction between the cylinder 10 and the bolt is increased, preventing loosening between them.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model 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 basic characteristics of this utility model. Therefore, the embodiments should be considered illustrative and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An anti-loosening compression rivet nut, characterized in that, include: The cylinder (10), the anti-slip part (20) provided on the cylinder (10), and the guide part (30) provided on the anti-slip part (20); the cylinder (10) is provided with an internal thread (40), and the root of the internal thread (40) is an R-shaped surface; the anti-slip part (20) and the guide part (30) form a pressure-expansion riveting structure.

2. The anti-loosening compression rivet nut according to claim 1, characterized in that, The anti-slip component (20) has a toothed structure to increase friction with the substrate.

3. The anti-loosening compression rivet nut according to claim 1, characterized in that, The guide (30) has a conical structure and functions as a positioning and flaring element.

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