Corrosion-resistant nut convenient to coat oil
By designing oil storage and oiling areas on the nuts and using gravity-based automatic oiling, the problem of bolt and nut corrosion is solved, achieving convenient rust prevention and economical use of grease.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-03-06
AI Technical Summary
Existing bolts and nuts are prone to rust during use. Current oiling methods have short grease action time, high oil consumption, and environmental impact, and are difficult to effectively prevent rust.
A rust-resistant and easy-to-apply oil nut is designed with an oil storage area and an oil application area. The nut utilizes gravity to allow grease to flow automatically into the threaded hole, thus achieving automatic oiling, extending the oiling cycle, and reducing grease consumption.
It effectively extends the lubrication and maintenance cycle of bolts and nuts, reduces grease consumption, and minimizes the impact on surrounding components and the environment.
Smart Images

Figure CN223975388U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical manufacturing, and in particular to a nut that is rust-resistant and easy to apply oil to. Background Technology
[0002] Bolts and nuts are susceptible to corrosion due to external environmental factors such as rain and air oxidation during use, affecting their service condition and lifespan. Currently, the common method to address corrosion is to apply oil periodically. However, the grease has a short working time, consumes a large amount of oil, and causes oil contamination to the bolts, nuts, surrounding components, and the environment. Some technologies, such as the "oil-storage nut (CN205605612U)" technology, have been developed to extend the grease's working time and reduce daily grease consumption. These technologies offer some convenience in oil application, but the grease's wetting ability on the threads is poor, making it difficult to effectively prevent nut corrosion. Utility Model Content
[0003] To address the problems existing in the prior art, this utility model provides a rust-resistant and easy-to-oil nut, suitable for bolt and nut systems that are vertically installed and require regular oiling.
[0004] The technical solution adopted in this utility model is as follows:
[0005] This utility model includes a nut body, on which a threaded hole and an oil storage area are provided;
[0006] The nut body has a central through hole, and an oil storage area is provided at the upper part of the central through hole, which stores grease; the middle and lower parts of the central through hole are machined with threads to form a threaded hole, and the outer diameter of the oil storage area is larger than the diameter of the threaded hole.
[0007] The nut is installed vertically.
[0008] It also includes an oiling area, where at least one groove is provided on the threaded hole wall in the middle of the central through hole, and the upper end of the groove is connected to the oil storage area.
[0009] An opening for communication with the oiling area is provided at the bottom of the oil storage area above the oiling area.
[0010] The bottom of the oiling area is a slope, and the grease flowing into the oiling area flows along the slope to the threaded hole under the action of gravity.
[0011] The oil storage area is divided into multiple slopes. Under the action of gravity, the grease in the oil storage area flows along the multiple slopes to the oiling area, and then flows into the threaded hole.
[0012] The outer contour of the nut body is hexagonal.
[0013] The nut body is made of Q235-A or 45# carbon steel.
[0014] The beneficial effects of this utility model are: it can effectively extend the daily oiling maintenance cycle of bolts and nuts, reduce oil consumption, and reduce the impact of oiling on surrounding components and the environment. Attached Figure Description
[0015] Figure 1 This is a plan view of the present invention.
[0016] Figure 2 This is a cross-sectional view of the present invention.
[0017] In the diagram: 1. Nut body, 2. Threaded hole, 3. Oil reservoir, 4. Oiling area. Detailed Implementation
[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0019] The plan view of this utility model is as follows: Figure 1 As shown, the cross-sectional view is as follows Figure 2 As shown, the device includes a nut body 1, which has a threaded hole 2 and an oil reservoir 3. The nut body 1 has a central through hole, and the upper part of the central through hole has an oil reservoir 3 containing grease. The middle and lower parts of the central through hole are threaded to form the threaded hole 2. The outer diameter of the oil reservoir 3 is larger than the diameter of the threaded hole 2. In a specific implementation, the inner contour of the threaded hole 2 is circular, and the hole wall of the threaded hole 2 is threaded.
[0020] The nut is installed vertically, meaning that the circumference of the nut is along the direction of gravity.
[0021] It also includes an oiling area 4. In specific implementation, several oiling areas 4 are arranged in the middle of the central through hole as needed. At least one groove is provided on the threaded hole wall in the middle of the central through hole, and the upper end of the groove is connected to the oil storage area 3.
[0022] An opening is provided at the bottom of the oil storage area 3 above the oiling area 4 for communicating with the oiling area 4.
[0023] The bottom of the oiling area 4 is a slope. When the nut is installed vertically, the grease flowing into the oiling area 4 flows along the slope to the threaded hole 2 under the action of gravity.
[0024] The oil storage area 3 is divided into multiple slopes, which are connected in sequence. The lowest section of the multiple slopes is a sloping surface. When the nut is installed vertically, the grease in the oil storage area 3 flows along the multiple slopes to the oiling area 4 under the action of gravity, and then flows into the threaded hole 2.
[0025] When the nut of this utility model is fitted with a threaded bolt or screw, the oil storage area 3 first stores grease. The grease in the oil storage area 3 flows into the upper end of the threaded hole 2 through multiple inclined sections. On the other hand, it also enters the oiling area 4 through the opening between the oil storage area 3 and the oiling area 4. Then, the grease in the oiling area 4 enters the thread gap under the rotation between the nut and the bolt or screw, thereby achieving rust prevention and facilitating oiling.
[0026] The outer contour of the nut body 1 is hexagonal.
[0027] The nut body 1 is made of Q235-A or 45# carbon steel.
[0028] The above description of the embodiments is intended to detail the technical concept and key features of this utility model, and is aimed at helping those skilled in the art to understand the content of the utility model and implement it accordingly, but is not intended to limit the scope of protection of this utility model. Any equivalent substitutions, changes or modifications made based on the core spirit and technical essence of this utility model should be considered as being covered within the scope of protection of this utility model, so as to ensure the applicability and innovativeness of its technical solution in various situations.
Claims
1. A nut with anti-rust and convenient oiling function, comprising a nut body (1), characterized in that: a threaded hole (2) and an oil storage area (3) are arranged on the nut body (1); the nut body (1) is provided with a central through hole, the upper part of the central through hole is provided with the oil storage area (3), the oil storage area (3) stores grease, the middle and lower parts of the central through hole are provided with threaded hole walls, and the threaded hole walls are threaded hole (2); the outer diameter of the oil storage area (3) is larger than the diameter of the threaded hole (2).
2. The nut with anti-rust and convenient oiling function according to claim 1, characterized in that: the nut is vertically installed.
3. The nut with anti-rust and convenient oiling function according to claim 1, characterized in that: further comprising an oiling area (4), at least one groove is arranged on the threaded hole wall of the middle part of the central through hole, and the upper end of the groove is communicated with the oil storage area (3).
4. The nut with anti-rust and convenient oiling function according to claim 3, characterized in that: an opening for communicating with the oiling area (4) is arranged on the bottom of the oil storage area (3) above the oiling area (4).
5. The nut with anti-rust and convenient oiling function according to claim 3, characterized in that: the bottom of the oiling area (4) is a slope, and the grease flowing into the oiling area (4) flows to the threaded hole (2) along the slope under the action of gravity.
6. The nut with anti-rust and convenient oiling function according to claim 5, characterized in that: the oil storage area (3) is divided into multiple slopes, and the grease in the oil storage area (3) flows to the oiling area (4) along the multiple slopes under the action of gravity, and then flows into the threaded hole (2).
7. The nut with anti-rust and convenient oiling function according to claim 1, characterized in that: the outer contour of the nut body (1) is hexagonal.
8. The nut with anti-rust and convenient oiling function according to claim 1, characterized in that: the material of the nut body (1) is Q235-A or 45# carbon steel.
Citation Information
Patent Citations
Oil storage nut
CN205605612U