Self drilling screw capable of achieving graded cutting
By designing angled edges and grooves of varying heights on the drilling tail screws, graded cutting is achieved, solving the problem of insufficient anti-slip and wear resistance when used on hard materials, and improving cutting efficiency and wear resistance.
Patent Information
- Application Number
- CN202422388619.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-29
AI Technical Summary
When traditional drill tail screws are used on harder materials or materials of different hardness, they have insufficient anti-slip and wear resistance, resulting in reduced tightness and poor applicability.
A drill tail screw that can be cut in graded is designed, and the blade is arranged at an angle, with a first groove and a second groove arranged on the blade. The heights of the first groove and the second groove are different, and the edge and the groove stroke are complementary to enhance cutting sharpness and chip removal effect.
Through the hierarchical cutting design, the cutting length of the edge is reduced, the pressure is increased, and the sharper cutting effect is achieved, the cutting efficiency and wear resistance of the drilling tail screw are improved, and the loss is reduced.
Smart Images
Figure CN223004282U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fasteners, and more specifically, to an improvement of a self-drilling screw. Background Art
[0002] When a traditional self-drilling screw is in use, its tip part is mainly used for drilling holes and fixing in relatively soft materials (such as wood). However, when encountering harder materials or when it is necessary to fix on materials with different hardnesses, a single tip design often fails to meet the requirements. In the prior art, the anti-slip performance of the self-drilling screw during use is weak, resulting in a decrease in the overall fastening performance. The wear resistance of the self-drilling screw itself during use is weak, resulting in poor applicability during the overall use. Summary of the Utility Model
[0003] (I) Technical Problems to be Solved
[0004] Aiming at the deficiencies of the prior art, the utility model provides a self-drilling screw that can perform graded cutting, which has the advantages of improving the cutting efficiency and reducing the loss of the self-drilling screw, thereby solving the problems of weak anti-slip performance resulting in a decrease in the overall fastening performance and weak wear resistance of the self-drilling screw during use.
[0005] (II) Technical Solutions
[0006] To achieve the above advantages of improving the cutting efficiency and reducing the loss of the self-drilling screw, the specific technical solutions adopted by the utility model are as follows:
[0007] A self-drilling screw that can perform graded cutting, which includes a screw body. A cutting part is provided at the front end of the screw body, and a nut is provided at the end far from the cutting part. The cutting part is provided with a chip removal groove, and a cutting edge is formed by stamping on the outside of the chip removal groove. The cutting edge is arranged at an angle. The cutting edge is provided with a first groove and a second groove. The first groove is opened on the cutting edge of the cutting edge, and the second groove is opened on the other cutting edge of the cutting edge. The heights of the first groove and the second groove are not equal. A connecting piece is provided on the screw body, and a thread is provided on the surface of the connecting piece. One end of the connecting piece is connected to the nut, and the other end is connected to the cutting part.
[0008] Furthermore, at least two groups of chip removal grooves are provided, and the two groups of chip removal grooves are symmetrically arranged on both sides of the connecting piece.
[0009] Furthermore, the two cutting edges are complementary to the first groove and the second groove in terms of stroke.
[0010] Furthermore, the nut is a hexagonal or internal hexagonal fixing nut.
[0011] (III) Beneficial Effects
[0012] Compared with the prior art, the utility model provides a self-drilling screw that can perform hierarchical cutting, and has the following beneficial effects:
[0013] By opening the first groove on the cutting edge of the blade and the second groove on the other cutting edge of the blade, the cutting length of the cutting edge is reduced, the pressure on the cutting edge is increased, and the effect of sharper cutting is achieved. The heights of the first groove and the second groove are not equal, and the cutting edge forms a complement with the first groove and the second groove. After the cutting edge finishes cutting, a mark will be left, and the subsequent cutting edge of the other group will perform supplementary cutting to fill the mark left by the complementary cutting groove, improving the cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0015] Figure 1 is a schematic structural diagram of the present utility model;
[0016] Figure 2 is a top view of the present utility model;
[0017] Figure 3 is the second schematic structural diagram of the present utility model.
[0018] In the figure: screw body 1, cutting part 2, nut 3, chip removal groove 21, cutting edge 22, first groove 4, second groove 5, connecting piece 11. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] To further illustrate the embodiments, the present utility model provides drawings. These drawings are a part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.
[0020] According to an embodiment of the present utility model, a self-drilling screw that can perform hierarchical cutting is provided.
[0021] Now, the present utility model will be further described in combination with the drawings and specific implementation manners, as Figures 1-3As shown in the figure, a self-drilling screw that can perform graded cutting according to an embodiment of the present invention includes a screw body 1. A cutting part 2 is provided at the front end of the screw body 1, and a nut 3 is provided at the end far from the cutting part 2. The cutting part 2 is provided with a chip discharge groove 21, and a cutting edge 22 is formed by stamping on the outside of the chip discharge groove 21. The cutting edge 22 is arranged at an angle. A first groove 4 and a second groove 5 are provided on the cutting edge 22. The first groove 4 is opened on the cutting edge of the cutting edge 22, and the second groove 5 is opened on the other cutting edge of the cutting edge 22, reducing the cutting length of the cutting edge and increasing the pressure of the cutting edge, achieving the effect of making the cutting more sharp. The heights of the first groove 4 and the second groove 5 are not equal. A connecting piece 11 is provided on the screw body 1. The surface of the connecting piece 11 is provided with threads. One end of the connecting piece 11 is connected to the nut 3, and the other end is connected to the cutting part 2.
[0022] In one embodiment, at least two groups of the chip discharge grooves 21 are provided, and the two groups of chip discharge grooves 21 are located on both sides of the connecting piece 11. Thereby, the chip discharge effect is improved.
[0023] In one embodiment, the two cutting edges are complementary to the first groove 4 and the second groove 5. After one cutting edge finishes cutting, there will be a cut left. The subsequent cutting edge of the other group will perform complementary cutting to fill the cut left by the complementary cutting groove.
[0024] In one embodiment, the nut 3 is a hexagonal or internal hexagonal fixing nut.
[0025] Working principle: The first groove 4 is opened on the cutting edge of the cutting edge 22, and the second groove 5 is opened on the other cutting edge of the cutting edge 22, thereby reducing the cutting length of the cutting edge and increasing the pressure of the cutting edge, achieving the effect of making the cutting more sharp. The heights of the first groove 4 and the second groove 5 are not equal. The cutting edge is complementary to the first groove and the second groove 5. After one cutting edge finishes cutting, there will be a cut left. The subsequent cutting edge of the other group will perform complementary cutting to fill the cut left by the complementary cutting groove, improving the cutting effect.
[0026] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0027] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A self-drilling screw capable of graded cutting, comprising a screw body (1), a cutting portion (2) being provided at the front end of the screw body (1), and a nut (3) being provided at the end away from the cutting portion (2), wherein: The cutting portion (2) is provided with a chip groove (21), and a blade (22) is formed on the outer side of the chip groove (21) by stamping. The blade (22) is arranged at an angle. A first groove (4) and a second groove (5) are arranged on the blade (22). The first groove (4) is arranged on the edge of the blade (22), and the second groove (5) is arranged on the other edge of the blade (22). The heights of the first groove (4) and the second groove (5) are different. A connecting piece (11) is arranged on the screw body (1), and a thread is arranged on the surface of the connecting piece (11). One end of the connecting piece (11) is connected to the nut (3), and the other end is connected to the cutting portion (2).
2. A self-drilling screw capable of graded cutting according to claim 1, characterized in that: At least two groups of chip removal grooves (21) are provided, and the two groups of chip removal grooves (21) are symmetrically located on both sides of the connecting piece (11).
3. A self-drilling screw capable of graded cutting according to claim 1, characterized in that: The two groups of cutting edges are complementary to the first groove (4) and the second groove (5).
4. A self-drilling screw capable of graded cutting according to claim 1, characterized in that: The nut (3) is a hexagonal or hexagonal fixing nut.