Self-locking anti-loosening screw and tooth plate mold thereof

Abstract

A self-locking anti-loosening screw includes a screw body and a screw head. The screw body includes a screw shank, a screw tip, a thread, and an anti-loosening groove. The anti-loosening groove includes two opposing V-shaped grooves, a low groove on one side of the V-shaped groove, and a high groove on the other side of the V-shaped groove. The two ends of the two V-shaped grooves are connected by the low groove and the high groove, respectively, and multiple discontinuous gap areas are formed between the anti-loosening groove and the thread. After the self-locking anti-loosening screw is screwed in and tightened, these gap areas are filled with cutting debris, thereby embedding the anti-loosening groove into the material, forming a multi-point, multi-anchor locking structure, further enhancing the screw's self-locking and anti-loosening capability. The present invention also provides a die mold for a self-locking anti-loosening screw, wherein the stationary die plate and the movable die plate form the thread through the provided thread groove, and the anti-loosening groove forms the anti-loosening groove.

Description

Technical Field

[0001] This invention relates to the field of screw manufacturing technology, and in particular to a self-locking anti-loosening screw and its die plate mold. Background Technology

[0002] Screws are tools that use the physical and mathematical principles of inclined planes, circular rotation, and friction to gradually fasten objects and machine parts. In the use of screws, ordinary self-tapping screws, or screws, only consist of three parts: a shank, threads, and a head. They are simple to manufacture but have poor stability, easily causing problems such as wood cracking and screw misalignment during tapping, and have low work efficiency. For example, Chinese patent CN202022406354.X discloses a flat-head Phillips head self-tapping screw. A self-tapping head is fixedly installed above the shank, and a self-tapping thread is provided on the outer wall of the shank. A self-tapping head is fixedly installed below the shank. The head has a cross-shaped groove inside, and a spare cross-shaped groove inside. Both the spare cross-shaped groove and the cross-shaped groove have positioning holes, with four positioning holes in total. Four movable slots are provided outside the cross-shaped groove, and each of the four movable slots has a movable plate inside. Although the screw strength has been increased, its stability after locking cannot be guaranteed. The screw is prone to dislodging, and its self-locking and anti-loosening ability is not strong. Summary of the Invention

[0003] In view of this, the present invention provides a self-locking anti-loosening screw and its die plate mold to solve the above problems.

[0004] A self-locking anti-loosening screw includes a screw body and a screw head disposed at one end of the screw body. The screw body includes a screw shank, a screw tip disposed at the end of the screw shank away from the screw head, a threaded section on the screw shank, and an anti-loosening groove disposed on the screw tip. The anti-loosening groove includes two V-shaped grooves disposed opposite to each other on both sides of the screw tip, a low groove disposed on one side of the V-shaped grooves, and a high groove disposed on the other side of the V-shaped grooves. The two ends of the two V-shaped grooves are respectively connected by the low groove and the high groove, and multiple discontinuous gap regions are formed between the anti-loosening groove and the threaded section.

[0005] Furthermore, the diameter at the connection between the screw and the screw head gradually increases towards the end of the screw head.

[0006] Furthermore, the opening direction of the V-shaped pattern is towards the screw tip.

[0007] Furthermore, the sidewalls of the V-shaped pattern are obliquely arranged, and the tip of the V-shaped pattern is obliquely arranged towards the screw head. The two sides of the tip gradually converge from its sidewalls, forming a triangular pyramidal structure in space with the sidewalls of the screw tip.

[0008] A die mold for a self-locking anti-loosening screw includes a stationary die plate and a movable die plate. The stationary die plate and the movable die plate have the same side structure opposite to each other. The stationary die plate includes a protrusion disposed on the surface of the stationary die plate, a plurality of screw grooves disposed obliquely on the stationary die plate, and an anti-loosening groove disposed on the protrusion. The anti-loosening groove is composed of a plurality of V-shaped grooves, a plurality of low grooves, and a plurality of high grooves.

[0009] Furthermore, the two V-shaped grooves are spaced apart and connected by a low groove or a high groove, with the low groove and the high groove spaced apart.

[0010] Compared with existing technologies, the self-locking anti-loosening screw provided by this invention possesses excellent self-locking performance due to its thread with a small helix angle, effectively reducing the tendency of the screw to loosen under vibration and improving long-term stability after locking. Furthermore, multiple discontinuous gap areas are formed between the thread and the anti-loosening groove. After the screw is tightened, these gap areas are filled with cutting debris, thereby embedding the anti-loosening groove into the material, forming a multi-point, multi-anchor locking structure, further enhancing the screw's self-locking and anti-loosening capability. This invention also provides a die mold for the self-locking anti-loosening screw, wherein the stationary die plate and the moving die plate form the thread through the provided thread groove, and the anti-loosening groove forms the anti-loosening groove. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the self-locking anti-loosening screw provided by the present invention.

[0012] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0013] Figure 3 This is a schematic diagram of the toothed plate mold for the self-locking anti-loosening screw provided by the present invention.

[0014] Figure 4 for Figure 3 Enlarged diagram of point B in the middle.

[0015] Reference numerals: Screw body 10, screw 11, screw tip 12, thread 13, anti-slip groove 14, V-groove 141, low groove 142, high groove 143, screw head 20, stationary thread plate 30, ridge 31, thread groove 32, anti-slip groove 33, V-groove 331, low groove 332, high groove 333, moving thread plate 40. Detailed Implementation

[0016] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0017] like Figure 1 The diagram shown is a structural schematic of the self-locking anti-loosening screw provided by the present invention. The self-locking anti-loosening screw includes a screw body 10 and a screw head 20 disposed at the end of the screw body 10. It is conceivable that the high-speed tapping self-locking screw also includes some other functional modules, such as materials for manufacturing the screw, slots for inserting screwdrivers, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0018] Please see Figure 2 The screw body 10 includes a screw 11, a screw tip 12 disposed at the end of the screw 11 away from the screw head 20, a thread 13 disposed on the screw 11, and an anti-slipping thread 14 disposed on the screw tip 12.

[0019] The diameter of the connection between the screw 11 and the screw head 20 gradually increases towards the screw head 20, thus strengthening the connection and making it less prone to breakage when the screw is subjected to large torque or lateral impact force. This significantly improves the overall structural strength and service life of the screw. The helix angle of the thread 13 is 15°. This small helix angle design gives the thread good self-locking performance, effectively reducing the tendency of the screw to loosen under vibration, improving long-term stability after locking, and preventing it from falling off.

[0020] The anti-loosening texture 14 includes two V-shaped textures 141 disposed opposite to each other on both sides of the screw tip 12, a low texture 142 disposed on one side of the V-shaped texture 141, and a high texture 143 disposed on the other side of the V-shaped texture 141.

[0021] The opening of the V-shaped groove 141 faces the screw tip 12. The two ends of the two V-shaped grooves 141 are connected to the high groove 143 via the low groove 142, forming a continuous, non-closed spatial skeleton structure for the anti-loosening groove 14. This creates multiple discontinuous gap areas between the anti-loosening groove 14 and the thread 13. After the screw is tightened, these gap areas are filled with the cut debris, embedding the anti-loosening groove 14 into the material and forming a multi-point, multi-anchor locking structure, enhancing the screw's self-locking and anti-loosening capability.

[0022] The V-shaped groove 141 has its sidewalls angled, with its tip pointing obliquely towards the screw head 20. The two sides of the tip gradually taper from its sidewalls, forming a triangular pyramidal structure with the sidewall of the screw tip 12. The apex of this pyramid is located on the sidewall of the screw tip 12. When the screw is screwed into the cutting material, debris naturally fills the gap between the anti-loosening groove 14 and the thread 13 along the sidewall of the V-shaped groove 141, thus filling the gap.

[0023] Both the low-level groove 142 and the high-level groove 143 are horizontally arranged, extending circumferentially along the screw tip 12. The low-level groove 142 is located on the side of the anti-slip groove 14 near the tip of the screw tip 12, and the high-level groove 143 is located on the side of the anti-slip groove 14 near the screw 11. During screw insertion, chips are first guided to the gaps near the low-level groove 142, and then, as the screw continues to be screwed in, the chips gradually fill the gaps near the high-level groove 143. This bottom-up, graded filling sequence ensures that the gap areas are fully filled, rather than just accumulating in localized areas.

[0024] like Figure 3 The diagram shows a schematic representation of the die plate mold for the self-locking anti-loosening screw provided by the present invention. The die plate mold includes a stationary die plate 30 and a movable die plate 40 disposed opposite to one side of the stationary die plate 30. It is conceivable that the die plate mold for the high-speed tapping self-locking screw also includes other functional modules, such as an assembly module, a drive module, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0025] Both the stationary tooth plate 30 and the movable tooth plate 40 are rectangular blocks. The stationary tooth plate 30 is stationary, while the movable tooth plate 40 is driven by a drive module to reciprocate horizontally. When the stationary tooth plate 30 and the movable tooth plate 40 overlap, the screw is forced into the space between them, thus completing the tooth rolling process. The long side of the stationary tooth plate 30 is shorter than the long side of the movable tooth plate 40, ensuring a more thorough and complete tooth rolling. The specific operation of the tooth rolling process is existing technology and will not be described in detail here.

[0026] Please see Figure 4 The stationary tooth plate 30 and the movable tooth plate 40 have the same side structure opposite to each other, and the stationary tooth plate 30 will be described here. The stationary tooth plate 30 includes a protrusion 31 disposed on the surface of the stationary tooth plate 30, a plurality of threaded grooves 32 disposed obliquely on the stationary tooth plate 30, and an anti-detachment groove 33 disposed on the protrusion 31.

[0027] The protrusion 31 is located at the edge of the surface of the stationary thread plate 30, and its width gradually increases towards the screw threading direction to form the screw tip 12 during the screw threading process. The protrusion 31 should be prior art, and it also includes smooth surfaces, shear surfaces, etc., which are technologies known to those skilled in the art, and therefore will not be described in detail here. The screw groove 32 is distributed on the surface of the stationary thread plate 30, and its inclination angle along the length direction of the stationary thread plate 30 is 15°, which can form the thread 13 on the screw during the screw threading process. The anti-loosening groove 33 is composed of multiple V-grooves 331, multiple low grooves 332, and multiple high grooves 333. Specifically, two V-grooves 331, one low groove 332, and one high groove 333 form a group. Two V-grooves 331 are spaced apart and connected by one low groove 332 or one high groove 333, with the low groove 332 and the high groove 333 spaced apart. The anti-loosening groove 33 can form the anti-loosening texture 14 on the screw during the screw thread rolling process. It is understood that the size variation of the die plate mold is to select the appropriate machine type according to the actual required thickness of the high-speed wood lock screw.

[0028] Compared with existing technologies, the self-locking anti-loosening screw provided by this invention has excellent self-locking performance due to the small helix angle of the thread 13, which can effectively reduce the loosening tendency of the screw under vibration and improve the long-term stability after locking. Furthermore, multiple discontinuous gap areas are formed between the thread 13 and the anti-loosening groove 14. After the screw is tightened, these gap areas will be filled with the cut debris, thereby embedding the anti-loosening groove 14 into the material, forming a multi-point, multi-anchor locking structure, further strengthening the screw's self-locking and anti-loosening capability. This invention also provides a die mold for the self-locking anti-loosening screw, wherein the stationary die 30 and the moving die 40 form the thread 13 through the provided thread groove 32, and the anti-loosening groove 33 forms the anti-loosening groove 14.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. A self-locking anti-loosening screw, characterized in that: The self-locking anti-loosening screw includes a screw body and a screw head disposed at the end of the screw body. The screw body includes a screw rod, a screw tip disposed at the end of the screw rod away from the screw head, a thread disposed on the screw rod, and an anti-loosening groove disposed on the screw tip. The anti-loosening groove includes two V-shaped grooves disposed opposite to each other on both sides of the screw tip, a low groove disposed on one side of the V-shaped groove, and a high groove disposed on the other side of the V-shaped groove. The two ends of the two V-shaped grooves are respectively connected by the low groove and the high groove. Multiple discontinuous gap areas are formed between the anti-loosening groove and the thread.

2. The self-locking anti-loosening screw according to claim 1, characterized in that: The diameter of the connection between the screw and the screw head gradually increases towards the end of the screw head.

3. The self-locking anti-loosening screw according to claim 1, characterized in that: The opening of the V-shaped groove faces the screw tip.

4. The self-locking anti-loosening screw according to claim 1, characterized in that: The sidewalls of the V-shaped groove are obliquely arranged, and the tip of the V-shaped groove is obliquely arranged towards the screw head. The two sides of the tip gradually converge from its sidewall, forming a triangular pyramid structure in space with the sidewall of the screw tip.

5. A die plate mold for a self-locking anti-loosening screw according to any one of claims 1 to 4, characterized in that: The self-locking anti-loosening screw die mold includes a stationary die plate and a movable die plate. The stationary die plate and the movable die plate have the same side structure opposite to each other. The stationary die plate includes a protrusion on the surface of the stationary die plate, multiple threaded grooves obliquely disposed on the stationary die plate, and an anti-loosening groove disposed on the protrusion. The anti-loosening groove is composed of multiple V-shaped grooves, multiple low grooves, and multiple high grooves.

6. The die plate mold for the self-locking anti-loosening screw according to claim 5, characterized in that: The two V-shaped grooves are spaced apart and connected by a low groove or a high groove, with the low groove and the high groove spaced apart.

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