Self-lubricating nut

Abstract

The utility model discloses a self-lubricating nut which comprises a nut body, an inner threaded hole is formed in the nut body, a plurality of oil cavities are formed in the nut body, oil filling ports communicated with the oil cavities are formed in the upper end face and the lower end face of the nut body respectively, and the oil cavities are arranged around the circumference of the inner threaded hole in an array mode. The oil cavity is communicated with the inner threaded hole through a plurality of oil seepage holes formed in sequence, lubricating oil or lubricating grease is contained in the oil cavity, and a cap is buckled to the oil filling opening. According to the self-lubricating nut, the lubricating effect can be formed in the nut for a long time, the rusting problem of the nut after long-time use is reduced, the deformation of the nut caused by overlarge friction force is reduced, the service life of the nut is prolonged, and the self-lubricating nut is suitable for being used by devices needing regular maintenance, assembly and disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of nut technology, specifically relating to self-lubricating nuts. Background Technology

[0002] A nut, also called a bolt or screw thread, is a fastener that is screwed onto a bolt or screw for secure fastening. The fastening method of a nut and bolt is removable, allowing for easy loosening and disassembly. When a standard nut is screwed onto a bolt, the coefficient of friction between them is relatively high. This not only requires a large torque during installation and disassembly, increasing the labor intensity of operators, but also easily generates excessive heat due to friction, damaging the materials of the nut and bolt and affecting their service life. To reduce friction, lubricating oil or grease is usually applied to the mating parts of the nut and bolt periodically. However, this manual, periodic maintenance method has several drawbacks. On the one hand, the maintenance cycle is difficult to accurately determine; maintaining it too early or too late may affect the lubrication effect. On the other hand, applying lubricating media in some hard-to-reach installation locations is very difficult, or even impossible. In complex working environments, such as high temperature, high humidity, and strong corrosion, ordinary lubrication methods cannot guarantee continuous and effective lubrication performance. High temperatures may cause lubricating oil to evaporate or deteriorate, high humidity environments can easily lead to rust and corrosion of metal parts, and highly corrosive environments will quickly destroy the lubricating film, thereby aggravating the wear between nuts and bolts and seriously affecting the normal operation and safety of equipment.

[0003] With the continuous improvement of automation in modern industry, higher requirements are placed on the stability and reliability of mechanical equipment. The frequent maintenance required for traditional nuts is clearly insufficient to meet the needs of long-term continuous operation and low maintenance costs in automated production. Therefore, developing a nut that can automatically provide lubrication, adapt to complex working conditions, and is easy to maintain has become an urgent problem to be solved. Utility Model Content

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a self-lubricating nut, including a nut body, an internal threaded hole on the nut body, a plurality of oil cavities inside the nut body, an oil filling port connecting the oil cavities on the upper end face and the lower end face of the nut body, the oil cavities being arranged in a circle around the internal threaded hole, the oil cavities being connected to the internal threaded hole through a plurality of sequentially arranged oil seepage holes, the oil cavities being filled with lubricating oil or lubricating grease, and a cap being fastened to the oil filling port.

[0005] As a preferred embodiment of the above technical solution, the nut is a hexagonal nut, and the oil chambers are located on one of the corners of the hexagonal nut.

[0006] As a preferred embodiment of the above technical solution, the oil filling port is provided with a slot for the cap to be inserted around its perimeter.

[0007] As a preferred embodiment of the above technical solution, the cap is conical in shape, with the end of the cap having the largest diameter fitting into a slot.

[0008] As a preferred embodiment of the above technical solution, springs are respectively provided in the oil cavity, and the springs are sandwiched between the cap of the oil filling port on the upper end face of the nut body and the cap of the oil filling port on the lower end face of the nut body.

[0009] As a preferred embodiment of the above technical solution, the number of slots at the oil filling port on the upper end of the nut body is multiple, and the multiple slots are arranged sequentially at the oil filling port.

[0010] As a preferred embodiment of the above technical solution, the oil seepage hole is inclined, with the lowest end of the oil seepage hole connected to the oil cavity and the highest end of the oil seepage hole connected to the internal threaded hole.

[0011] The beneficial effects of this utility model are: the self-lubricating nut of this utility model can form a lubricating effect inside the nut for a long time, reduce the problem of rust after the nut has been used for a long time, reduce the deformation of the nut due to excessive friction, and improve the service life of the nut. It is suitable for use in devices that require regular maintenance and disassembly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model. Detailed Implementation

[0014] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] like Figure 1-2 As shown, the self-lubricating nut includes a nut body 1 with an internal threaded hole 2. The nut body 1 has several oil cavities 3 inside. The upper and lower ends of the nut body 1 each have an oil inlet 4 connecting to the oil cavities 3. The oil cavities 3 are arranged in a circular pattern around the internal threaded hole 2. The oil cavities 3 are connected to the internal threaded hole 2 through several sequentially arranged oil seepage holes 5. The oil cavities 3 are filled with lubricating oil or lubricating grease. A cap 6 is fastened to the oil inlet 4. Before use, the oil cavities 3 are filled with lubricating oil or lubricating grease, and then the cap 6 is tightened. The lubricating oil or lubricating grease slowly seeps out from the oil seepage holes 5, providing lubrication and protection for the nut and screw, preventing corrosion. When the nut is rotated again, the nut and screw are less likely to deform due to excessive friction, thus improving their service life.

[0018] Furthermore, the nut is a hexagonal nut, and the oil chambers 3 are located on one of the corners of the hexagonal nut.

[0019] Furthermore, the oil filling port 4 is provided with a slot 7 for the cap 6 to be inserted around one end.

[0020] Furthermore, the cap 6 is cone-shaped, with the end of the cap 6 having the largest diameter fitting into the slot 7.

[0021] Furthermore, springs are respectively installed in the oil cavity 3, with the springs sandwiched between the cap 6 of the oil filling port 4 on the upper end face of the nut body 1 and the cap 6 of the oil filling port 4 on the lower end face of the nut body 1. The springs provide support for the lubricant, holding most of the lubricant in place and reducing the amount of lubricant that flows out of the oil seepage hole 5 within a short time due to its own weight, thus achieving a slow-release effect of the lubricant.

[0022] Furthermore, the nut body 1 has multiple slots 7 at the oil inlet 4 on its upper end, arranged sequentially at the oil inlet 4. Before tightening the nut, pressing down the cap 6 at the oil inlet 4 forces the lubricating oil or grease in the oil chamber 3 out through the oil seepage hole 5, allowing the lubricating oil or grease to enter between the nut and the screw. The multiple slots 7 allow the lubricating oil or grease in the oil chamber 3 to be squeezed multiple times. After the lubricating oil or grease in the oil chamber 3 is used up, the cap 6 can be forcibly broken, causing the cap 6 and spring to detach from the oil chamber 3, allowing new lubricating oil or grease to be injected back into the oil chamber 3.

[0023] Furthermore, the oil seepage hole 5 is inclined, with its lowest end connected to the oil cavity 3 and its highest end connected to the internal thread hole 2. The inclined oil seepage hole 5 reduces the loss of lubricating oil and grease during normal use of the nut.

[0024] It is worth mentioning that the technical features of lubricating oil, lubricating grease and other related technologies involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and control method and spatial arrangement of these technical features can be adopted by conventional choices in the field and should not be regarded as the utility model point of this utility model patent. This utility model patent will not be further elaborated in detail.

[0025] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experimentation on the basis of the prior art should be within the scope of protection defined by the claims.

Claims

1. A self-lubricating nut, characterized in that, It includes a nut body with an internal threaded hole and several oil cavities inside. The upper and lower ends of the nut body are respectively provided with oil filling ports that connect to the oil cavities. The oil cavities are arranged in a circle around the internal threaded hole. The oil cavities are connected to the internal threaded hole through several sequentially arranged oil seepage holes. The oil cavities are filled with lubricating oil or lubricating grease. A cap is fastened to the oil filling port.

2. The self-lubricating nut as described in claim 1, characterized in that, The nut is a hexagonal nut, and the oil chambers are located at one of the corners of the hexagonal nut.

3. The self-lubricating nut as described in claim 1, characterized in that, The oil filling port is provided with a slot for the cap to be inserted around its perimeter.

4. The self-lubricating nut as described in claim 3, characterized in that, The cap is cone-shaped, with the largest diameter end of the cap fitting into a slot.

5. The self-lubricating nut as described in claim 4, characterized in that, Springs are installed in the oil chambers, and the springs are sandwiched between the caps of the oil inlet on the upper end face of the nut body and the caps of the oil inlet on the lower end face of the nut body.

6. The self-lubricating nut as described in claim 5, characterized in that, The nut body has multiple slots at the oil filling port on the upper end, and these slots are arranged sequentially at the oil filling port.

7. The self-lubricating nut as described in claim 6, characterized in that, The oil seepage hole is inclined, with the lowest end of the oil seepage hole connected to the oil cavity and the highest end of the oil seepage hole connected to the internal threaded hole.

Images