Rust-proof hexagon nut with double sealing rings

Abstract

The utility model provides a rustproof hexagon nut with double sealing rings, which comprises a hexagon nut body with an upper sealing groove and a lower sealing groove, and the upper sealing ring and the lower sealing ring which are mounted in a matched manner, the upper sealing groove adopts the design that the inner diameter of a groove opening is smaller than that of the groove bottom to enhance sealing performance, and the lower sealing groove is provided with a limiting ring matched with a sealing ring limiting groove to prevent looseness. The groove bottom protruding points and the sealing ring grooves are meshed to improve vibration resistance, the flow guide grooves in the top of the nut are connected with the six inclined effusion grooves to achieve rapid drainage, the structure effectively isolates corrosive media through double sealing barriers, and the anti-rust performance and fastening reliability of the nut are remarkably improved by combining active drainage and mechanical anti-loosening design.

Description

Technical Field

[0001] This utility model specifically relates to a double-sealing-ring rust-proof hexagonal nut. Background Technology

[0002] A hexagonal nut is a standard fastener with a threaded inner hole and a regular hexagonal outer contour. It needs to be used with bolts or screws to achieve mechanical connection through thread engagement. It is usually manufactured through processes such as cold heading, heat treatment, and sealing component integration. Depending on different functions and usage scenarios, it is usually divided into types such as rust-proof nuts, anti-loosening nuts, and sealing nuts.

[0003] Ordinary hexagonal nuts rely on the mechanical engagement of threads and bolts for fastening, but they lack an active sealing design and are prone to loosening or leakage due to vibration, temperature differences, or corrosion. In addition, traditional nuts are mostly made of carbon steel with galvanized or chrome-plated surfaces, which are prone to rusting when exposed to humid or salt spray environments for a long time, affecting the structural lifespan. They need to be coated with anti-rust oil or replaced regularly, especially in high-temperature, high-pressure, or corrosive media, resulting in high maintenance costs.

[0004] Therefore, it is necessary to invent a double-sealing-ring rust-proof hexagonal nut to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a double-sealing ring anti-rust hexagonal nut, which can perform double sealing and ensure the sealing performance of the connection.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a double-sealing-ring anti-rust hexagonal nut, comprising a hexagonal nut body, wherein the top of the hexagonal nut body is provided with an upper sealing groove and the bottom is provided with a lower sealing groove, and an upper sealing ring and a lower sealing ring are respectively installed on the corresponding upper and lower sides;

[0009] The top of the hexagonal nut body is also provided with a guide groove outside the upper sealing groove. Multiple drainage grooves extend around the guide groove. One end of the drainage groove is connected to the guide groove, and the other end is connected to the outside.

[0010] The inner diameter of the upper sealing groove opening is smaller than the inner diameter of its bottom, and the shape of the upper sealing ring matches the shape of the inner side of the upper sealing groove.

[0011] A limiting ring extends from the middle of the inner wall of the lower sealing groove. The limiting ring has the same size as the bottom of the lower sealing groove, and the lower sealing ring is provided with a limiting groove that matches the limiting ring.

[0012] Preferably, the bottom of the lower sealing groove is provided with a plurality of evenly arranged protrusions, the plurality of protrusions are concentrically arranged, and the inner diameter of the limiting ring does not exceed the inner diameter of the hexagonal nut body. The end of the lower sealing ring is provided with a groove matching the plurality of protrusions, the plurality of grooves are also evenly arranged.

[0013] Preferably, both the upper sealing ring and the lower sealing ring have through holes in their middle portions that match the internal diameter of the hexagonal nut body, and the bottom dimensions of the upper sealing ring and the lower sealing ring are the same, that is, the bottom dimensions of the upper sealing groove and the lower sealing groove are the same.

[0014] Preferably, the guide groove is arranged in a ring on the top of the hexagonal nut body, and the bottom of the drain groove is a slope, which slopes outward from the guide groove towards the outside of the hexagonal nut body. There are six drain grooves, matching the six sides of the hexagonal nut body.

[0015] Preferably, the opening of the upper sealing groove is arc-shaped, and the connecting inner wall is also arc-shaped, that is, the outer edge of the upper sealing ring is arc-shaped.

[0016] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0017] 1. This utility model forms a double sealing barrier by embedding the upper sealing ring and the lower sealing ring into the upper sealing groove and the lower sealing groove respectively, which effectively prevents moisture, dust and corrosive media from entering the nut.

[0018] 2. This utility model collects the liquid that seeps in from the top through an annular guide channel and quickly discharges the liquid to the outside of the nut through six inclined drainage channels, avoiding liquid accumulation and corrosion. The inclined design of the drainage channels further optimizes the drainage efficiency, and the six drainage channels match the side of the hexagonal nut, taking into account both structural symmetry and functionality.

[0019] 3. The limiting ring of the lower sealing groove and the limiting groove of the lower sealing ring cooperate to prevent the sealing ring from loosening under vibration or impact. The interlocking design of the protrusion at the bottom of the groove and the groove of the sealing ring increases the frictional resistance, further suppressing the rotation or displacement of the sealing ring and improving the overall anti-loosening performance of the nut. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the disassembled structure of the lower sealing ring of this utility model;

[0023] Figure 3 This is a schematic diagram of the overall structure of the lower sealing ring of this utility model;

[0024] Figure 4 This is a schematic diagram of the disassembled upper sealing ring structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Hexagonal nut body; 11. Upper sealing groove; 12. Lower sealing groove; 13. Guide groove; 14. Drain groove; 15. Limiting ring; 16. Protrusion; 2. Upper sealing ring; 3. Lower sealing ring; 31. Limiting groove; 32. Groove. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model provides, for example Figure 1-5 The double-sealing-ring anti-rust hexagonal nut shown includes a hexagonal nut body 1. The hexagonal nut body 1 has an upper sealing groove 11 at the top and a lower sealing groove 12 at the bottom. The upper sealing ring 2 and the lower sealing ring 3 are respectively installed on the upper and lower sides.

[0030] Specifically, the top of the hexagonal nut body 1 is also provided with a guide groove 13 outside the upper sealing groove 11. Multiple drainage grooves 14 extend around the guide groove 13. One end of the drainage groove 14 is connected to the guide groove 13, and the other end is connected to the outside.

[0031] Specifically, the inner diameter of the opening of the upper sealing groove 11 is smaller than the inner diameter of its bottom, and the shape of the upper sealing ring 2 matches the inner shape of the upper sealing groove 11.

[0032] Specifically, a limiting ring 15 extends from the middle of the inner wall of the lower sealing groove 12. The limiting ring 15 has the same size as the bottom of the lower sealing groove 12, and the lower sealing ring 3 is provided with a limiting groove 31 that matches the limiting ring 15.

[0033] In this embodiment, a sealing groove 11 is machined on the top of the hexagonal nut body 1, with the inner diameter of the groove opening being smaller than the inner diameter of the groove bottom, and the groove opening and connecting inner wall being arc-shaped; a lower sealing groove 12 is machined on the bottom, with concentrically arranged protrusions 16 provided on the bottom of the groove, and a limiting ring 15 extending from the middle of the inner wall of the groove opening. An annular guide groove 13 is machined on the outer side of the top, and six inclined drainage grooves 14 extend outward, corresponding to the six sides of the hexagonal nut.

[0034] In this embodiment, the upper sealing ring 2, made of elastic material, is pressed into the upper sealing groove 11. Because the groove opening is small and arc-shaped, the edge of the sealing ring deforms under pressure and gets stuck into the bottom of the groove. The arc-shaped structure reduces installation resistance and ensures a tight fit.

[0035] Specifically, the bottom of the lower sealing groove 12 is provided with a plurality of evenly arranged protrusions 16, which are concentrically arranged, and the inner diameter of the limiting ring 15 does not exceed the inner diameter of the hexagonal nut body 1. The end of the lower sealing ring 3 is provided with a groove 32 matching the plurality of protrusions 16, which are also evenly arranged.

[0036] In this embodiment, the pre-made limiting groove 31 of the lower sealing ring is aligned with the limiting ring 15 of the lower sealing groove 12 and embedded, and the groove 32 engages with the protrusion 16 at the bottom of the groove to ensure that the sealing ring is fixed in position and has no rotational displacement.

[0037] Specifically, the upper sealing ring 2 and the lower sealing ring 3 are both provided with through holes in the middle that match the internal diameter of the hexagonal nut body 1. The bottom dimensions of the upper sealing ring 2 and the lower sealing ring 3 are the same, that is, the bottom dimensions of the upper sealing groove 11 and the lower sealing groove 12 are the same.

[0038] Specifically, the guide groove 13 is arranged in a ring on the top of the hexagonal nut body 1, and the bottom of the drain groove 14 is a slope, which is inclined outward from the guide groove 13 towards the hexagonal nut body 1. The drain groove 14 has six grooves, matching the six sides of the hexagonal nut body 1.

[0039] Specifically, the opening of the upper sealing groove 11 is set to be arc-shaped, and the inner wall of the connection is also arc-shaped, that is, the outer edge of the upper sealing ring 2 is matched to be arc-shaped.

[0040] In this embodiment, the through hole of the sealing ring is aligned with the inner diameter of the nut, so it does not affect the normal passage of the bolt after installation. The bottom dimensions of the upper and lower sealing grooves are consistent, making the bottom dimensions of the sealing ring uniform and simplifying the production process.

[0041] In this embodiment, the arc-shaped groove of the upper sealing ring 2 and the matching design of the sealing ring form a radial compression seal, preventing external moisture and dust from seeping into the thread from the top. The interlocking structure of the limiting ring 15 and the protrusion 16 of the lower sealing ring 3 prevents the sealing ring from shifting, and the cooperation between the groove 32 and the protrusion 16 enhances the friction, forming a stable sealing layer and isolating the corrosive medium at the bottom. The guide groove 13 collects the liquid that seeps in from the top. The drain groove 14 quickly guides the liquid to the outside of the nut, avoiding water accumulation and corrosion, which is especially suitable for humid or outdoor environments. The limiting ring 15 and the protrusion 16 of the lower sealing groove 11 are designed to prevent the sealing ring from loosening due to vibration, ensuring the sealing reliability during long-term use. The through holes of the upper and lower sealing rings are consistent with the inner diameter of the nut, avoiding additional friction on the bolt and ensuring stable tightening torque. The standardized design of the upper and lower sealing rings allows for mass production and adaptation to different nut specifications. The arc-shaped groove and limiting structure simplify the installation process, allowing the sealing ring to be pressed in without special tools.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A double-sealing-ring rust-proof hexagonal nut, characterized in that: The product includes a hexagonal nut body (1), the top of which is provided with an upper sealing groove (11) and the bottom with a lower sealing groove (12), and the corresponding upper and lower sides are respectively equipped with an upper sealing ring (2) and a lower sealing ring (3). The top of the hexagonal nut body (1) is located outside the upper sealing groove (11) and a guide groove (13) is provided. Multiple drainage grooves (14) extend around the guide groove (13). One end of the drainage groove (14) is connected to the guide groove (13) and the other end is connected to the outside. The inner diameter of the opening of the upper sealing groove (11) is smaller than the inner diameter of its bottom, and the shape of the upper sealing ring (2) matches the inner shape of the upper sealing groove (11). A limiting ring (15) extends from the middle of the inner wall of the lower sealing groove (12). The limiting ring (15) has the same size as the bottom of the lower sealing groove (12), and the lower sealing ring (3) is provided with a limiting groove (31) that matches the limiting ring (15).

2. The double-sealing-ring rust-proof hexagonal nut according to claim 1, characterized in that: The bottom of the lower sealing groove (12) is provided with a plurality of evenly arranged protrusions (16), the plurality of protrusions (16) are concentrically arranged, and the inner diameter of the limiting ring (15) does not exceed the inner diameter of the hexagonal nut body (1). The end of the lower sealing ring (3) is provided with a groove (32) matching the plurality of protrusions (16), the plurality of grooves (32) are also evenly arranged.

3. The double-sealing-ring rust-proof hexagonal nut according to claim 1, characterized in that: Both the upper sealing ring (2) and the lower sealing ring (3) have through holes in the middle that match the internal diameter of the hexagonal nut body (1). The bottom dimensions of the upper sealing ring (2) and the lower sealing ring (3) are the same, that is, the bottom dimensions of the upper sealing groove (11) and the lower sealing groove (12) are the same.

4. The double-sealing ring rust-proof hexagonal nut according to claim 1, characterized in that: The guide groove (13) is arranged in a ring on the top of the hexagonal nut body (1), and the bottom of the drain groove (14) is a slope, which is inclined from the guide groove (13) to the outside of the hexagonal nut body (1). The drain groove (14) has six grooves, matching the six sides of the hexagonal nut body (1).

5. The double-sealing-ring rust-proof hexagonal nut according to claim 1, characterized in that: The upper sealing groove (11) is arc-shaped at the opening, and the inner wall of the connection is also arc-shaped, that is, the outer edge of the upper sealing ring (2) is arc-shaped.

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