High-low tooth screw
By introducing a return spring and rubber ring lubrication system into the high and low thread screws, the problem of screw rusting is solved, and lubrication and sealing effects are achieved, improving the ease of screw assembly and disassembly and extending the service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINYI SCREW SHANGHAI CO LTD
- Filing Date
- 2025-03-12
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional high and low thread screws are prone to rusting after long-term use, making disassembly and assembly difficult and affecting connection stability and service life.
A high-low thread screw is designed, comprising a nut, a screw, a return spring, a movable rubber ring, and an annular oil-absorbing cotton. The return spring's elasticity causes the rubber ring to press against the object being installed. When the screw is rotated, the annular oil-absorbing cotton evenly applies lubricating oil, forming an oil film to lubricate the threads and prevent rust. Furthermore, the self-locking of the high-low thread sections and the sealing of the rubber ring prevent corrosion.
It achieves lubrication and sealing of screws, prevents rust, facilitates disassembly and assembly, and improves the stability and service life of the connection.
Smart Images
Figure CN224134957U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of screw technology, and in particular to a high-low thread screw. Background Technology
[0002] A screw is a common fastener, primarily used to connect or secure two objects. Screws typically have external threads, allowing them to be screwed into holes with existing internal threads, creating a tightening effect through rotation. The head of a screw comes in various shapes, such as slotted, Phillips, and hexagonal, to facilitate operation with the appropriate screwdriver or wrench.
[0003] High-low thread screws, as the name suggests, feature a thread design with varying heights. This design not only improves the tightening effect but also offers several other advantages. The unique design of high-low thread screws generates greater friction when tightened, thus enhancing the strength of the connection. This high-strength connection is crucial in many engineering applications, especially those requiring the withstand of heavy loads or vibrations.
[0004] Traditional screws, such as high and low thread screws, are prone to rusting after long-term use, making it difficult to screw them in or out, causing difficulties in disassembly and assembly, and affecting the removal of the fixed items. In response to this, this application proposes a high and low thread screw. Utility Model Content
[0005] To address the aforementioned problems, this application provides a high / low thread screw.
[0006] The high / low thread screw provided in this application adopts the following technical solution:
[0007] A high-low thread screw includes a nut, a screw rod fixed at the center of one side of the nut, and a high-thread section and a low-thread section on the outer wall of the screw rod away from the nut. A lubrication mechanism is provided on one side of the nut. The lubrication mechanism includes a return spring fixed on the edge of one side of the nut, a movable rubber ring rotatably disposed at one end of the return spring and used to abut against the installed item, and an annular oil-absorbing cotton fixed inside the movable rubber ring for lubricating the screw rod, the high-thread section and the low-thread section when the screw rotates. A fixed rubber plate is fixed in the middle of the outer wall of the screw rod to abut against the compressed movable rubber ring and close the opening of the movable rubber ring.
[0008] By adopting the above technical solution, the elastic force of the return spring can send the movable rubber ring to the outside of the tip. Then, the movable rubber ring is pressed against the object to be installed. By rotating the screw, the annular oil-absorbing cotton can apply the lubricating oil more evenly to the threaded parts such as the high thread section, thereby forming an oil film on the threaded surface of the screw to lubricate the screw and prevent the threaded part from rusting, making it convenient to disassemble and assemble the screw.
[0009] Preferably, the end of the screw away from the nut has a pointed tip, the high-thread section and the low-thread section extend to the outer wall of the pointed tip, and the nut has a hole at the center of the side away from the screw for inserting a compatible screwdriver.
[0010] By adopting the above technical solution, the screw can be rotated and screwed into the installation object such as a wooden board by rotating the screw rod with its tip. The worker can use a screwdriver of the corresponding shape to insert into the screw hole to drive the screw to rotate.
[0011] Preferably, a rotating groove is provided on one side of the movable rubber ring, and a connecting ring and a rotating ring are rotatably connected in the rotating groove of the movable rubber ring. The connecting ring and the rotating ring are fixedly connected, the width of the rotating ring is greater than the width of the connecting ring, and the connecting ring is fixedly connected to one end of the return spring.
[0012] By adopting the above technical solution, the movable rubber ring can connect and limit the connecting ring and the rotating ring through the rotating groove, and because the width of the rotating ring is greater than that of the connecting ring, the return spring can rotate on one side of the movable rubber ring without disengaging.
[0013] Preferably, the screw is engaged with the annular oil-absorbing cotton, the annular oil-absorbing cotton is engaged with the fixed rubber plate, and a tapered hole is provided in the middle of the side of the annular oil-absorbing cotton near the tip.
[0014] By adopting the above technical solution, as the screw continues to rotate, the threaded parts such as the high thread section will rotate and move within the movable rubber ring. When the threaded parts move, they will squeeze and contact the annular oil-absorbing cotton, so that the annular oil-absorbing cotton can apply the lubricating oil more evenly to the threaded parts such as the high thread section.
[0015] In summary, this application includes at least one of the following beneficial technical effects:
[0016] 1. The elastic force of the return spring can send the movable rubber ring to the outside of the tip. Then, the movable rubber ring is pressed against the object to be installed. By rotating the screw, the annular oil-absorbing cotton can evenly apply the lubricating oil to the threaded parts such as the high thread section, thereby forming an oil film on the threaded surface of the screw to lubricate the screw and prevent the threaded part from rusting. It is convenient to disassemble and assemble the screw. The lubrication of the threaded part can be completed by simply rotating the screw, which is easy to operate.
[0017] 2. By using high- and low-thread sections of varying heights, different thread paths are created within the installation object, such as wooden boards, when the screw is screwed in. This allows the high- and low-thread sections to form a self-locking mechanism within the installation object. Furthermore, the elasticity of the return spring firmly holds the movable rubber ring against the installation object, acting like an elastic washer to prevent loosening of the screw. This effectively ensures the stability of the screw after installation. When the return spring is fully compressed, the fixed rubber plate presses against the movable rubber ring to seal the connection between the installation object and the screw, preventing the screw from rusting and extending its service life. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of a high and low thread screw according to an embodiment of this application;
[0019] Figure 2 This is a schematic diagram of the internal structure of a high / low thread screw according to an embodiment of this application;
[0020] Figure 3 This is a top view schematic diagram mainly illustrating the nut in the embodiments of this application;
[0021] Figure 4 The embodiments of this application mainly embody Figure 2 Enlarged view of the structure of A in the middle;
[0022] Reference numerals: 1. Nut; 11. Screw; 12. High thread section; 13. Low thread section; 14. Tip; 15. Rotary hole; 2. Return spring; 21. Movable rubber ring; 22. Annular oil-absorbing cotton; 23. Tapered hole; 24. Rotary groove; 25. Connecting ring; 26. Rotary ring; 3. Fixed rubber plate. Detailed Implementation
[0023] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.
[0024] This application discloses a high-low thread screw.
[0025] A type of high and low thread screw, refer to Figure 1-2 The screw includes a nut 1, a screw rod 11, a high-thread section 12, and a low-thread section 13. The screw rod 11 is fixedly located at the center of one side of the nut 1. The nut 1 and the screw rod 11 form the main body of the screw. The high-thread section 12 and the low-thread section 13 are located on the outer wall of the end of the screw rod 11 away from the nut 1. The end of the screw rod 11 away from the nut 1 is provided with a tip 14. The high-thread section 12 and the low-thread section 13 extend to the outer wall of the tip 14. By rotating the screw rod 11, the tip 14 can be used to rotate the screw and screw it into the installation item such as a wooden board.
[0026] By using the high-threaded section 12 and the low-threaded section 13 with different heights, different thread trajectories can be generated in the installed items such as wooden boards when screwed in, so that the high-threaded section 12 and the low-threaded section 13 form a self-locking mechanism in the installed items. The nut 1, screw 11, high-threaded section 12 and low-threaded section 13 and other components constitute the existing high-low thread screw. The high-low thread screw can be a self-tapping screw or an ordinary fastening screw. Its specific internal structure and principle have been disclosed and will not be described in detail here.
[0027] Reference Figure 1-3 The nut 1 has a screw hole 15 at the center of the side away from the screw 11 for inserting a compatible screwdriver. The screw hole 15 can be a special shape such as a slotted, cross-shaped, or diamond-shaped screwdriver, so that the operator can insert a screwdriver of the corresponding shape into the screw hole 15 to rotate the screw.
[0028] Reference Figure 1 , Figure 2 and Figure 4 The nut 1 is provided with a lubrication mechanism on one side. The lubrication mechanism includes a return spring 2 fixedly disposed on the edge side of the nut 1, a movable rubber ring 21 rotatably disposed at one end of the return spring 2 and used to abut against the installed item, and an annular oil-absorbing cotton 22 fixedly disposed in the movable rubber ring 21 for lubricating the screw 11, the high thread section 12 and the low thread section 13 when the screw rotates. The elastic force of the return spring can send the movable rubber ring 21 to the outside of the tip 14, and the annular oil-absorbing cotton 22 can absorb and temporarily store the lubricating oil.
[0029] Reference Figure 1 , Figure 2 and Figure 4 The movable rubber ring 21 has a rotating groove 24 on one side. A connecting ring 25 and a rotating ring 26 are rotatably connected in the rotating groove 24 of the movable rubber ring 21. The connecting ring 25 and the rotating ring 26 are fixedly connected. The width of the rotating ring 26 is greater than the width of the connecting ring 25. The connecting ring 25 is fixedly connected to one end of the return spring 2. The movable rubber ring 21 can connect and limit the connecting ring 25 and the rotating ring 26 through the rotating groove 24. Since the width of the rotating ring 26 is greater than that of the connecting ring 25, the return spring 2 can rotate on one side of the movable rubber ring 21 without disengaging. When the movable rubber ring 21 is pressed against the installed item, the movable rubber ring 21 does not need to rotate with the screw, thereby reducing the wear between the movable rubber ring 21 and the installed item.
[0030] Reference Figure 1 , Figure 2 and Figure 4The screw 11 abuts against the annular oil-absorbing cotton 22, and the annular oil-absorbing cotton 22 abuts against the fixed rubber plate 3. A tapered hole 23 is provided in the middle of the side of the annular oil-absorbing cotton 22 near the tip 14. The tapered hole 23 can guide the threaded part of the compressed annular oil-absorbing cotton 22, so that the threaded part such as the high thread section 12 is not easily over-compressed by the annular oil-absorbing cotton 22.
[0031] During installation, the return spring 2 can use its elasticity to send the movable rubber ring 21 to the outside of the tip 14. Then, the movable rubber ring 21 is pressed against the installation object such as a wooden board. Then, by rotating the screw, the high thread section 12 and other threaded parts of the screw are rotated into the installation object. At this time, as the screw continues to rotate, the high thread section 12 and other threaded parts will rotate and move within the fixed movable rubber ring 21. When the threaded parts move, they will squeeze and contact the annular oil-absorbing cotton 22, so that the annular oil-absorbing cotton 22 can apply lubricating oil more evenly to the high thread section 12 and other threaded parts.
[0032] Reference Figure 2 and Figure 4 A fixed rubber plate 3 is fixedly provided on the middle of the outer wall of the screw 11 to abut against the compressed movable rubber ring 21 and close the opening of the movable rubber ring 21. When the threaded part of the screw, such as the high thread section 12, is fully screwed into the installed item, the return spring 2 will be fully compressed. At this time, the fixed rubber plate 3 on the outside of the screw 11 can abut against the compressed movable rubber ring 21 and close the opening of the movable rubber ring 21. At this time, the movable rubber ring 21 and the fixed rubber plate 3 can seal the connection between the installed item and the screw, making the screw less prone to rust and extending the service life of the screw.
[0033] The implementation principle of a high / low thread screw in this application embodiment is as follows:
[0034] During installation, the return spring 2 can use its elasticity to send the movable rubber ring 21 to the outside of the tip 14. Then, the movable rubber ring 21 is pressed against the installation item such as a wooden board. Next, a screwdriver of the corresponding shape is inserted into the screw hole 15 to drive the screw to rotate. As the screw rotates, it can be screwed into the installation item such as a wooden board using the threaded part such as the high thread section 12 and the tip 14.
[0035] As the screw continues to rotate, the threaded parts, such as the high thread section 12, will rotate and move within the movable rubber ring 21. When the threaded parts move, they will squeeze and contact the annular oil-absorbing cotton 22, so that the annular oil-absorbing cotton 22 can evenly apply the lubricating oil to the threaded parts, such as the high thread section 12, thereby forming an oil film on the threaded surface of the screw to lubricate the screw and prevent the threaded parts from rusting, making it convenient to disassemble and assemble the screw.
[0036] When the high thread section 12 and other threaded parts of the screw are fully screwed into the installed item, the return spring 2 will be fully compressed. At this time, the fixed rubber plate 3 on the outside of the screw 11 can resist the compressed movable rubber ring 21 and close the opening of the movable rubber ring 21. Thus, the connection between the installed item and the screw is sealed by the movable rubber ring 21 and the fixed rubber plate 3, making the screw less prone to rust and extending the service life of the screw.
[0037] By using the high thread section 12 and low thread section 13 with different heights, different thread trajectories can be generated in the installation item such as a wooden board when screwed in. This allows the high thread section 12 and low thread section 13 to form a self-locking mechanism in the installation item. Furthermore, the elastic force of the return spring 2 can firmly press the movable rubber ring 21 against the installation item, which can prevent the screw from loosening like an elastic washer, effectively ensuring the stability of the screw after installation.
[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A high-low thread screw, comprising a nut (1), a screw rod (11) fixedly disposed at the center of one side of the nut (1), and a high-thread section (12) and a low-thread section (13) disposed on the outer wall of the end of the screw rod (11) opposite to the nut (1), wherein a lubrication mechanism is provided on one side of the nut (1), characterized in that: The lubrication mechanism includes a return spring (2) fixedly disposed on one edge of the nut (1), a movable rubber ring (21) rotatably disposed at one end of the return spring (2) and used to abut against the installed item, and an annular oil-absorbing cotton (22) fixedly disposed inside the movable rubber ring (21) for lubricating the screw (11), the high thread section (12) and the low thread section (13) when the screw rotates. A fixed rubber plate (3) is fixedly disposed in the middle of the outer wall of the screw (11) for abutting against the compressed movable rubber ring (21) and closing the opening of the movable rubber ring (21).
2. The high-low thread screw of claim 1, wherein: The screw (11) has a tip (14) at the end opposite to the nut (1), and the high thread section (12) and low thread section (13) extend to the outer wall of the tip (14).
3. The high-low tooth screw of claim 1, wherein: The nut (1) has a screw hole (15) at the center of the side away from the screw (11) for inserting a compatible screwdriver.
4. The high-low thread screw of claim 1 wherein: A rotating groove (24) is provided on one side of the movable rubber ring (21), and a connecting ring (25) and a rotating ring (26) are rotatably connected in the rotating groove (24) of the movable rubber ring (21).
5. The high-low thread screw of claim 4, wherein: The connecting ring (25) and the rotating ring (26) are fixedly connected. The width of the rotating ring (26) is greater than the width of the connecting ring (25). The connecting ring (25) is fixedly connected to one end of the return spring (2).
6. The high-low tooth screw of claim 1, wherein: The screw (11) is fitted into the annular oil-absorbing cotton (22), and the annular oil-absorbing cotton (22) is fitted into the fixed rubber plate (3).
7. The high-low tooth screw of claim 2, wherein: The annular oil-absorbing cotton (22) has a conical hole (23) in the middle of the side near the tip (14).