A rustproof bolt

Abstract

The utility model relates to the field of bolts, disclose a kind of rust-proof bolts, including threaded column and nut, the threaded hole is equipped in the middle position of threaded column upper end, the oil outlet hole is equipped in the position of threaded hole two sides of threaded column upper end, two the oil outlet hole outer end are equipped with oil seepage hole, the limit ring is fixedly arranged in the nut lower end, the spring is fixedly arranged in the nut lower end near the middle position, the oil storage groove is equipped in the nut inner end, the oil storage groove both sides are equipped with through-hole, the cross groove is equipped in the nut upper end, the connecting bolt is threadedly arranged in the cross groove inner end middle position, the threaded column includes corrosion-resistant layer, the buffer layer is arranged in the corrosion-resistant layer inner end, the matrix layer is arranged in the buffer layer inner end.In the utility model, lubricating oil can be gradually discharged from oil storage groove through oil seepage hole, form uniform covering lubricating oil film, significantly improve the lubricity of threaded column surface and reduce friction.

Description

Technical Field

[0001] This utility model relates to the field of bolts, and more particularly to a rust-resistant bolt. Background Technology

[0002] A bolt is a mechanical fastener, typically consisting of a head, a shank, and threads. It achieves a fastening connection by mating with a nut or directly with another part (such as an internally threaded hole). Common types include externally threaded bolts, hexagonal head bolts, self-locking bolts, and high-strength bolts. They are mostly made of steel or alloy steel, and their surfaces are often galvanized, coated, or heat-treated to improve strength and corrosion resistance.

[0003] In the process of realizing this application, the inventors discovered the following problems with the prior art: conventional bolts are lubricated with lubricating oil during assembly to reduce friction, but the lubricating oil can only provide lubrication and rust prevention in the initial assembly stage. Over time, it is easily carried away or degraded by environmental factors (moisture, dust, temperature fluctuations, vibration, etc.), requiring regular reapplication, which leads to increased maintenance costs; at the same time, when threaded posts are installed in holes or on the surface of equipment, if the installation position is in contact with moving parts, transmission parts or vulnerable surfaces, they may be scratched, indented, corroded or cause local fatigue damage.

[0004] Therefore, those skilled in the art have provided a rust-resistant bolt to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rust-resistant bolt in which lubricating oil can be continuously discharged from the oil reservoir through the seepage hole, forming a uniformly covered lubricating oil film, which significantly improves the lubricity of the threaded bolt surface and reduces friction.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A rust-resistant bolt includes a threaded post and a nut. The threaded post has a threaded hole at the middle of its upper end, and oil outlet holes are formed at both sides of the threaded hole at the upper end of the threaded post. Each of the two oil outlet holes has an oil seepage hole at its outer end. A limit ring is fixedly provided at the lower end of the nut, and a spring is fixedly provided at the middle of the lower end of the nut. An oil reservoir is formed at the inner end of the nut, and through holes are formed on both sides of the oil reservoir. A cross groove is formed at the upper end of the nut, and a connecting bolt is threaded at the middle of the inner end of the cross groove. The threaded post includes a corrosion-resistant layer, a buffer layer is provided at the inner end of the corrosion-resistant layer, and a base layer is provided at the inner end of the buffer layer.

[0007] Furthermore, multiple oil seepage holes penetrate the threaded post, and the spring is disposed at the outer end of the threaded post.

[0008] Furthermore, the lower end of the spring is located at the lower end of the limiting ring, and the two through holes are connected to the two oil outlet holes.

[0009] Furthermore, the connecting bolt is threadedly connected to the threaded hole, and a buffer pad is fixedly provided at the lower end of the spring.

[0010] Furthermore, the corrosion-resistant layer is made of chromium-free zinc-aluminum coating, and the buffer layer is made of zinc-iron alloy.

[0011] Furthermore, the substrate layer is made of low-carbon steel.

[0012] This utility model has the following beneficial effects: 1. This utility model proposes a rust-resistant bolt in which lubricating oil is gradually released from the oil reservoir and discharged through the oil seepage hole during use, forming a uniformly covered lubricating oil film, which significantly improves the lubricity of the threaded post surface and reduces friction. The spring and buffer washer above the threaded post can provide a cushioning effect during installation, reducing potential damage to the equipment from impacts and improving the safety of the installation process.

[0013] 2. This utility model proposes a rust-resistant bolt. The corrosion-resistant layer of the threaded post is made of chromium-free zinc-aluminum coating, which can significantly reduce the corrosion rate of the metal surface in media such as acids, alkalis, and salt spray, thus extending its service life. The buffer layer is made of zinc-iron alloy, which can enhance the resistance to damage under mechanical impact and vibration, provide additional buffering and stress dispersion, improve thermal expansion fit, and reduce the impact of stress differences caused by temperature changes. The base layer is made of low-carbon steel, which can provide extremely high strength, tensile strength, and good toughness, ensuring that the overall structure does not undergo plastic deformation or fracture. Attached Figure Description

[0014] Figure 1 This is an overall isometric schematic diagram of the present invention; Figure 2 This is a cross-sectional schematic diagram of the threaded post, nut, limiting ring, and connecting bolt of this utility model; Figure 3 This is a cross-sectional schematic diagram of the threaded post, oil outlet, nut, spring, and oil reservoir of this utility model; Figure 4 This is an isometric schematic diagram of the threaded column, threaded hole, and oil outlet hole of this utility model; Figure 5 This is a top-view isometric schematic diagram of the nut, cross groove, and connecting bolt of this utility model; Figure 6 This is a bottom isometric view of the nut, limiting ring, connecting bolt and through hole of this utility model; Figure 7 This is a schematic diagram of the internal structure of the threaded column of this utility model.

[0015] Legend: 1. Threaded post; 2. Threaded hole; 3. Oil outlet; 4. Oil seepage hole; 5. Nut; 6. Limiting ring; 7. Spring; 8. Oil reservoir; 9. Cross groove; 10. Connecting bolt; 11. Through hole; 101. Corrosion resistant layer; 102. Buffer layer; 103. Base layer. Detailed Implementation

[0016] 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.

[0017] Reference Figures 1-6 One embodiment provided by this utility model: A rust-resistant bolt includes a threaded post 1 and a nut 5. The threaded post 1 has a threaded hole 2 at the middle of its upper end, and oil outlet holes 3 are provided on both sides of the threaded post 1 near the threaded hole 2. Each of the two oil outlet holes 3 has an oil seepage hole 4 at its outer end. A limit ring 6 is fixedly provided at the lower end of the nut 5. A spring 7 is fixedly provided at the middle of the lower end of the nut 5. An oil reservoir 8 is provided at the inner end of the nut 5. Through holes 11 are provided on both sides of the oil reservoir 8. A cross groove 9 is provided at the upper end of the nut 5. A connecting bolt 10 is threadedly provided at the middle of the inner end of the cross groove 9. Multiple oil seepage holes 4 penetrate the threaded post 1. The spring 7 is provided at the outer end of the threaded post 1. The lower end of the spring 7 is provided at the lower end of the limit ring 6. The two through holes 11 are connected to the two oil outlet holes 3. The connecting bolt 10 is threadedly connected to the threaded hole 2. A buffer pad is fixedly provided at the lower end of the spring 7.

[0018] Specifically, when connecting the threaded post 1 and the nut 5 together, first align the oil outlet 3 with the through hole 11 of the threaded post 1, and then the worker uses a tool to screw in the connecting bolt 10 to achieve a quick connection between the threaded post 1 and the nut 5. After connecting the connecting bolt 10 to the threaded post 1 for a section, lubricating oil can be added to the middle position of the cross groove 9. The lubricating oil will be stored in the oil reservoir 8. After adding a portion of lubricating oil to the oil reservoir 8, the connecting bolt 10 is fully screwed into the hole in the middle of the cross groove 9. At this time, the lubricating oil in the oil reservoir 8 will be discharged from the oil outlet 3 and finally from the oil seepage hole 4, thereby forming an oil film on the surface of the threaded post 1. The oil film can not only improve the corrosion resistance of the surface of the threaded post 1, but also increase the lubrication effect. After the connecting bolt 10 is fully screwed in, the operator can use a tool to align the cross groove 9 and install the device on the equipment. During installation, the spring 7 above the threaded post 1 and the buffer pad below the spring 7 can play a buffering role, thereby preventing the device from damaging the equipment when it is installed on the equipment. It should be noted that lubricating oil should only be injected into the oil reservoir 8 when the device is installed in the equipment in use. Avoid injecting lubricating oil when not in use to prevent waste. The diameter of the oil outlet 3 should be less than 0.8 mm and the diameter of the oil seepage hole 4 should be less than 0.3 mm to ensure that the lubricating oil in the oil reservoir 8 can seep out slowly.

[0019] Reference Figure 7 The threaded column 1 includes a corrosion-resistant layer 101, a buffer layer 102 is provided at the inner end of the corrosion-resistant layer 101, and a base layer 103 is provided at the inner end of the buffer layer 102. The corrosion-resistant layer 101 is made of chromium-free zinc-aluminum coating, the buffer layer 102 is made of zinc-iron alloy, and the base layer 103 is made of low-carbon steel.

[0020] Specifically, the corrosion-resistant layer 101 of the threaded post 1 is made of chromium-free zinc-aluminum coating, which can improve the corrosion resistance of the threaded post 1 in harsh environments, significantly reduce the corrosion rate of the metal surface in media such as acid, alkali, and salt spray, and extend its service life. The buffer layer 102 is made of zinc-iron alloy, which can enhance the resistance to damage during mechanical impact and vibration, provide additional buffering and stress dispersion, improve thermal expansion fit, and reduce the impact of stress differences caused by temperature changes. The base layer 103 is made of low-carbon steel, which can provide extremely high strength, tensile strength and good toughness, withstand the huge tightening torque, tensile load, bending stress and impact load during threaded connection, and ensure that the overall structure does not undergo plastic deformation or breakage. The buffer layer 102 and the substrate layer 103 are connected by a high-temperature diffusion welding process to form a continuous and dense interface, reducing the generation of interface penetration defects and microcracks.

[0021] Working principle: When connecting the threaded post 1 and the nut 5, first align the oil outlet 3 with the through hole 11 of the threaded post 1. Then, the operator uses a tool to screw in the connecting bolt 10 to achieve a quick connection between the threaded post 1 and the nut 5. After connecting the connecting bolt 10 to the threaded post 1 for a section, lubricating oil can be added to the middle position of the cross groove 9. The lubricating oil will be stored in the oil reservoir 8. After adding a portion of lubricating oil to the oil reservoir 8, the connecting bolt 10 is fully screwed into the hole in the middle of the cross groove 9. At this time, the lubricating oil in the oil reservoir 8 will be discharged through the oil outlet 3 and finally through the oil seepage hole 4, thus forming an oil film on the surface of the threaded post 1. After the connecting bolt 10 is fully screwed in, the operator can use a tool to align the cross groove 9 and install the device on the equipment. During installation, because there is a spring 7 above the threaded post 1, the spring 7 and the buffer pad below the spring 7 can play a buffering role. The limiting ring 6 can limit the excessive displacement of the spring 7 and prevent it from being overstretched. Secondly, the corrosion-resistant layer 101 of the threaded post 1 is made of chromium-free zinc-aluminum coating, which can improve the corrosion resistance of the threaded post 1 in harsh environments. The buffer layer 102 is made of zinc-iron alloy, which can enhance the resistance to damage under mechanical shock and vibration. The base layer 103 is made of low carbon steel, which can provide extremely high strength, tensile strength and good toughness.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rust-resistant bolt, comprising a threaded post (1) and a nut (5), characterized in that: A threaded hole (2) is provided at the middle position of the upper end of the threaded column (1). An oil outlet hole (3) is provided at the upper end of the threaded column (1) near the two sides of the threaded hole (2). An oil seepage hole (4) is provided at the outer end of each of the two oil outlet holes (3). A limit ring (6) is fixedly provided at the lower end of the nut (5). A spring (7) is fixedly provided at the middle position of the lower end of the nut (5). An oil storage groove (8) is provided at the inner end of the nut (5). A through hole (11) is provided on both sides of the oil storage groove (8). A cross groove (9) is provided at the upper end of the nut (5). A connecting bolt (10) is threaded at the middle position of the inner end of the cross groove (9). The threaded post (1) includes a corrosion-resistant layer (101), a buffer layer (102) is provided at the inner end of the corrosion-resistant layer (101), and a base layer (103) is provided at the inner end of the buffer layer (102).

2. The anti-corrosion bolt according to claim 1, characterized in that: Multiple oil seepage holes (4) penetrate the threaded post (1), and the spring (7) is located at the outer end of the threaded post (1).

3. The anti-corrosion bolt according to claim 1, characterized in that: The lower end of the spring (7) is located at the lower end of the limiting ring (6), and the two through holes (11) are connected to the two oil outlet holes (3).

4. The anti-corrosion bolt according to claim 1, characterized in that: The connecting bolt (10) is threadedly connected to the threaded hole (2), and a buffer pad is fixedly provided at the lower end of the spring (7).

5. The anti-corrosion bolt according to claim 1, characterized in that: The corrosion-resistant layer (101) is made of chromium-free zinc-aluminum coating, and the buffer layer (102) is made of zinc-iron alloy.

6. The anti-corrosion bolt according to claim 1, characterized in that: The substrate layer (103) is made of low-carbon steel.

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