Precise screw with self-lubricating function

Abstract

The utility model discloses a precision screw with a self-lubricating function. The precision screw comprises a main body structure forming the screw, the main body structure comprises a head part, a rod part and a thread part, the head part is located at one end of the rod part, and the thread part is located on the outer wall of the rod part; the lubricating mechanism is used for lubricating the thread part; the lubricating mechanism comprises a connecting part, oil leakage holes and a flow channel, the connecting part is located between the head part and the rod part, lubricating oil is stored in the connecting part, the oil leakage holes are symmetrically formed in the bottom of the connecting part, the flow channel is spirally formed in the rod part, and the upper end of the flow channel corresponds to the oil leakage holes. The self-lubricating precise screw solves the problem that a traditional precise screw lacks a self-lubricating function, in the screwing and loosening process of the screw, lubricating oil provided by the lubricating mechanism reduces friction force between the screw and a connected piece, assembly efficiency is improved, abrasion is reduced, stability and reliability of connection are enhanced, and meanwhile the trouble of frequent manual lubrication is avoided.

Description

Technical Field

[0001] This utility model relates to the field of precision screws, specifically a precision screw with self-lubricating function. Background Technology

[0002] A screw is a common fastener, typically consisting of a head and a threaded shank. It works by mating with a nut or screwing into a threaded hole, utilizing the friction and mechanical engagement of the threads to securely connect two or more components, serving a fastening and positioning function. In automotive driveshafts, screws play a crucial connecting and fixing role. The driveshaft is an important component of the automotive transmission system, used to transmit power from the engine to the drive wheels. Screws are used to connect various parts of the driveshaft, such as connecting the driveshaft tube to universal joints, intermediate supports, etc., ensuring that the connections between these components are firm and reliable. They are able to withstand various forces such as torque, tension, and vibration generated during power transmission, ensuring the normal operation of the driveshaft and enabling the car to obtain power and move.

[0003] A search revealed Chinese patent application CN201811519523.1, which discloses an automotive locking screw. The screw includes a first screw head with an adjusting edge at its lower end. A first bolt is fixedly connected to the lower end of the first screw head, and the first bolt has a first thread. An expansion port is located at the lower end of the first bolt, and an expansion adjustment cavity is located inside the first bolt. A mounting hole is located on the upper surface of the first screw head, and a second screw head is installed inside the mounting hole. An adjusting cutting edge is located on the upper surface of the second screw head, and a second bolt is fixedly connected to the lower end of the second screw head. The second bolt has a second thread. This invention features a simple structure, ease of use, and novel design. It defines the position of the automotive locking screw, thereby preventing it from loosening. The connection position is reliably fixed, its application range is wider, and its safety performance is higher.

[0004] The aforementioned technical solutions and traditional precision screws all have many problems in use, such as the lack of self-lubrication. During frequent tightening and loosening operations, the friction between the screw and the connected parts is large, which not only increases the difficulty of operation and reduces assembly efficiency, but also easily leads to wear of the screw and the connected parts, affecting the stability and reliability of the connection. In addition, in order to ensure the lubrication of the screw, it is necessary to manually add lubricating oil regularly. This not only increases maintenance costs and workload, but also makes lubrication very difficult in some special environments or hard-to-reach parts. Utility Model Content

[0005] The purpose of this invention is to provide a precision screw with self-lubricating function, which eliminates the need for regular manual lubrication as required by traditional precision screws. This avoids the difficulties of lubrication in special environments or hard-to-reach areas, greatly reducing maintenance costs and workload, and thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A precision screw with self-lubricating function, comprising:

[0008] Including the main structure that makes up the screw;

[0009] The main structure includes a head, a rod, and a threaded part, with the head located at one end of the rod and the threaded part located on the outer wall of the rod.

[0010] It also includes a lubrication mechanism for lubricating the threaded portion;

[0011] The lubrication mechanism includes a connecting part, an oil leakage hole, and a flow channel. The connecting part is located between the head and the rod. The connecting part stores lubricating oil. The bottom of the connecting part has symmetrically arranged oil leakage holes. The rod has a spiral flow channel, and the upper end of the flow channel corresponds to the oil leakage hole.

[0012] Preferably, the connecting part includes a storage chamber and an oil drain chamber, a miniature one-way valve is provided between the storage chamber and the oil drain chamber, and the oil leakage hole is located at the bottom of the oil drain chamber.

[0013] Preferably, a sealing groove is provided at the top center of the head, and a filling port communicating with the storage cavity is provided at the bottom of the sealing groove, with a plug installed in the filling port by internal thread.

[0014] Preferably, a pressure plate is provided at the upper end of the plug, and a sealing gasket is fitted onto the plug, with the sealing gasket located between the pressure plate and the bottom of the sealing groove.

[0015] Preferably, a copper sheet is sealed and inserted into the plug, with the upper end of the copper sheet extending to the top of the pressure plate to form a lever for rotating the plug, and the lower end of the copper sheet extending to the bottom of the inner cavity of the storage chamber.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. Due to the presence of the lubrication mechanism, the precision screw has a self-lubricating function. The lubricating oil stored in the connecting part can flow to the threaded part through the oil leakage hole and the flow channel (when the screw is tightened or loosened, the heat and pressure changes generated by friction will cause the lubricating oil in the storage cavity to expand due to heat. After passing through the one-way valve, it will slowly flow to the threaded part through the oil leakage hole and the flow channel to achieve automatic lubrication). This can effectively reduce the friction between the screw and the connected parts, reduce the difficulty of operation, and improve the assembly efficiency.

[0018] 2. Due to the lubricating effect of the lubricating oil, the friction between the screw and the connected parts is reduced, thereby reducing the wear of both and improving the stability and reliability of the connection, extending the service life of the screw and the connected parts; unlike traditional precision screws, there is no need to add lubricating oil manually on a regular basis, avoiding the difficulty of lubrication operations in special environments or hard-to-reach areas, and greatly reducing maintenance costs and workload. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the oil leakage hole of this utility model;

[0021] Figure 3 This is a schematic diagram of the storage cavity structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the plug of this utility model.

[0023] In the diagram: 1. Head; 2. Rod; 3. Threaded part; 4. Connecting part; 401. Storage chamber; 402. Oil drain chamber; 5. Oil leakage hole; 6. Flow channel; 7. Check valve; 8. Sealing groove; 9. Filling port; 10. Plug; 11. Pressure plate; 12. Sealing gasket; 13. Copper sheet. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-4 This utility model provides a technical solution:

[0026] A precision screw with self-lubricating function, comprising:

[0027] It includes the main structure that constitutes the screw; the main structure includes a head 1, a shank 2 and a threaded part 3, the head 1 is located at one end of the shank 2 and the threaded part 3 is located on the outer wall of the shank 2;

[0028] It also includes a lubrication mechanism for lubricating the threaded portion 3; the lubrication mechanism includes a connecting portion 4, an oil drain hole 5, and a flow channel 6. The connecting portion 4 is located between the head 1 and the rod portion 2, and stores lubricating oil inside the connecting portion 4. The bottom of the connecting portion 4 has symmetrically arranged oil drain holes 5, and the rod portion 2 has a spirally arranged flow channel 6, with the upper end of the flow channel 6 corresponding to the oil drain hole 5. The connecting portion 4 includes a storage chamber 401 and an oil drain chamber 402, and a miniature one-way valve 7 is provided between the storage chamber 401 and the oil drain chamber 402. The oil drain hole 5 is located at the inner bottom of the oil drain chamber 402.

[0029] The screw body consists of a head 1, a shank 2, and a threaded part 3, which serves as a connection. The connecting part 4 of the lubrication mechanism is located between the head 1 and the shank 2 and stores lubricating oil inside. When the screw is tightened or loosened, the heat and pressure changes generated by friction will cause the lubricating oil in the storage chamber 401 to expand due to heat. After passing through the one-way valve 7, it will slowly flow to the threaded part 3 through the oil leakage hole 5 and the flow channel 6 to achieve automatic lubrication. The lubricating oil that flows out is evenly distributed to the threaded part 3 along the spiral flow channel 6 on the outer wall of the shank 2 to achieve lubrication of the threaded part 3.

[0030] This design solves the problem of traditional precision screws lacking self-lubrication. During the tightening and loosening of the screw, the lubricating oil provided by the lubrication mechanism reduces the friction between the screw and the connected parts, improves assembly efficiency, reduces wear, enhances the stability and reliability of the connection, and avoids the trouble of frequent manual lubrication.

[0031] Please see Figure 3-4 :

[0032] A sealing groove 8 is provided at the top center of the head 1. A filling port 9 communicating with the storage cavity 401 is provided at the bottom of the sealing groove 8. A plug 10 is installed in the internal thread of the filling port 9. A pressure plate 11 is provided at the upper end of the plug 10. A sealing gasket 12 is fitted on the plug 10. The sealing gasket 12 is located between the pressure plate 11 and the bottom of the sealing groove 8.

[0033] Inside the sealing groove 8 at the top center of the head 1, there is a filling port 9 at the bottom that connects to the storage cavity 401. When lubricating oil needs to be added, unscrew the plug 10 that is threaded onto the filling port 9, and lubricating oil can be injected into the storage cavity 401 through the filling port 9. The sealing gasket 12 fitted on the plug 10 plays a sealing role between the pressure plate 11 and the bottom of the sealing groove 8, preventing lubricating oil leakage. After installing the plug 10, the sealing of the storage cavity 401 can be ensured, and the storage environment of the lubricating oil can be maintained.

[0034] This design facilitates the replenishment of lubricating oil in the storage chamber 401, ensuring the continuous functioning of the lubrication mechanism. The sealing structure effectively prevents lubricating oil leakage, extends the storage time of the lubricating oil, reduces lubrication failure caused by leakage, and further reduces maintenance costs and workload.

[0035] Please see Figure 4 :

[0036] A copper sheet 13 is sealed and inserted into the plug 10. The upper end of the copper sheet 13 extends to the top of the pressure plate 11 to form a lever for rotating the plug 10. The lower end of the copper sheet 13 extends to the bottom of the inner cavity of the storage cavity 401.

[0037] A copper sheet 13 is sealed and inserted into the plug 10. One end of the copper sheet 13 extends to the top of the pressure plate 11 to form a lever, and the other end extends to the bottom of the storage cavity 401. The operator can easily rotate the plug 10 by turning the lever to tighten and loosen the plug 10. At the same time, the part of the copper sheet 13 extending to the bottom of the storage cavity 401 can, to a certain extent, sense the level of lubricating oil in the storage cavity 401 (for example, when the lubricating oil level is low, the lower end of the copper sheet 13 may come into contact with less lubricating oil. The operator can determine the remaining amount of lubricating oil in the storage cavity 401 by unscrewing the plug 10 and observing the degree of lubricating oil contamination at the lower end of the copper sheet 13).

[0038] This design simplifies the operation of the plug 10, especially in situations where space is limited or direct operation of the plug 10 is difficult, allowing for more convenient operation via the lever. Additionally, the simple lubricant level sensing function helps operators promptly understand the remaining amount of lubricant in the storage chamber 401, enabling timely replenishment and ensuring the normal operation of the lubrication mechanism.

[0039] In addition, during the tightening or loosening of the screw, the end of the copper sheet 13 can be heated, and the heat is introduced into the storage cavity 401 through the copper sheet 13, thereby increasing and accelerating the expansion rate of the lubricating oil in the storage cavity 401, so that the lubricating oil can be discharged from the oil leakage hole 5 more quickly to achieve self-lubrication of the screw.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A precision screw with self-lubricating function, characterized in that, include: Including the main structure that makes up the screw; The main structure includes a head (1), a rod (2) and a threaded part (3), with the head (1) located at one end of the rod (2) and the threaded part (3) located on the outer wall of the rod (2). It also includes a lubrication mechanism for lubricating the threaded portion (3); The lubrication mechanism includes a connecting part (4), an oil leakage hole (5), and a flow channel (6). The connecting part (4) is located between the head (1) and the rod (2). The connecting part (4) stores lubricating oil. The bottom of the connecting part (4) is symmetrically provided with oil leakage holes (5). The rod (2) is provided with a spiral flow channel (6). The upper end of the flow channel (6) corresponds to the oil leakage hole (5).

2. A precision screw with self-lubricating function according to claim 1, characterized in that: The connecting part (4) includes a storage chamber (401) and an oil drain chamber (402). A miniature one-way valve (7) is provided between the storage chamber (401) and the oil drain chamber (402). The oil leakage hole (5) is located at the bottom of the oil drain chamber (402).

3. A precision screw with self-lubricating function according to claim 2, characterized in that: The head (1) has a sealing groove (8) at the top center, and a filling port (9) communicating with the storage cavity (401) is provided at the bottom of the sealing groove (8). A plug (10) is threaded into the filling port (9).

4. A precision screw with self-lubricating function according to claim 3, characterized in that: The upper end of the plug (10) is provided with a pressure plate (11), and a sealing gasket (12) is fitted on the plug (10). The sealing gasket (12) is located between the pressure plate (11) and the bottom of the sealing groove (8).

5. A precision screw with self-lubricating function according to claim 4, characterized in that: A copper sheet (13) is sealed and inserted into the plug (10). The upper end of the copper sheet (13) extends to the top of the pressure plate (11) to form a lever for rotating the plug (10). The lower end of the copper sheet (13) extends to the bottom of the inner cavity of the storage cavity (401).

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