High-drilling-speed dry wall nail

Abstract

The invention discloses a high-drilling-speed dry wall nail which comprises a nail head, a nail body and a nail point, the surface of the nail body is provided with a double-line fine thread, the end of the nail point is of a flat end face structure or an inclined end face structure, drilling precision and efficiency are improved, drilling torque is evenly distributed, and the risk of tip breakage is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fasteners, and particularly to a drywall screw with high drilling speed. Background Art

[0002] As a key fastener in the construction and decoration fields, drywall screws are widely used for fixing materials such as gypsum boards and light steel keels. Traditional drywall screws mostly adopt a tapered tip and single-thread design. Although they can meet the basic installation requirements, significant defects are exposed in the construction of high-density materials (such as hard gypsum boards and composite metal frames): First, the initial contact area of the tapered tip is small, and it is easy to slip and deviate during drilling, resulting in low drilling efficiency; Second, the thread distribution is asymmetric or the tooth depth is constant, generating a radial eccentric force during drilling, increasing the risk of nail body jitter and even fracture; Third, the tip strength is insufficient, and the tip breaks frequently in hard materials, affecting the continuity of construction.

[0003] Existing improvement solutions attempt to alleviate the above problems through structural optimization. For example:

[0004] The patent shown in CN220248601U improves the installation stability by adding a connecting plate and a spring assembly, but the additional structure increases the manufacturing cost and does not solve the core problem of the vulnerable tip;

[0005] The patent shown in CN204878210U adopts a double-thread fine-tooth thread design to improve the drilling speed, but the starting points of its threads are asymmetrically distributed, resulting in an imbalance of lateral forces during drilling and increasing the nail body offset;

[0006] The patent shown in CN205064519U enhances the rust prevention performance through phosphating treatment, but the tip still uses the traditional tapered structure and cannot adapt to the mechanical load of high-density materials.

[0007] Although the above solutions locally optimize the performance of drywall screws, they do not systematically solve the synergistic contradictions of drilling speed, strength, and stability. Especially in high-strength construction scenarios, existing drywall screws still face technical bottlenecks such as rapid drilling speed decay, high tip breakage rate, and insufficient installation accuracy. Therefore, there is an urgent need for a drywall screw structure design that combines high drilling efficiency, anti-fracture, and dynamic stability to break through the limitations of traditional technologies. Summary of the Invention

[0008] To solve the above technical problems, the present invention relates to a drywall screw with high drilling speed. The structure is simple and reliable, effectively solving the above technical problems and being suitable for popularization. To achieve the above object, the present invention is realized through the following technical solutions:

[0009] A drywall screw with high drilling speed, comprising a nail head, a nail body, and a nail tip. The surface of the nail body is provided with a double-thread fine-tooth thread, and the end of the nail tip is a flat end face structure or an inclined end face structure.

[0010] Based on the above - mentioned solution and as a preferred solution of the above - mentioned solution: The starting points of the double - thread fine - pitch threads are symmetrically distributed along the axis of the nail body, and the end points of the spiral paths of the two threads symmetrically terminate at the end face position of the nail tip at the same time.

[0011] Based on the above - mentioned solution and as a preferred solution of the above - mentioned solution: The outer diameter dimension of the nail tip region is from 0.15 mm to 0.35 mm.

[0012] Based on the above - mentioned solution and as a preferred solution of the above - mentioned solution: When the nail tip is of an inclined end - face structure, the angle α between its end face and the horizontal plane is from 5° to 60°.

[0013] Based on the above - mentioned solution and as a preferred solution of the above - mentioned solution: The tooth depth of the double - thread fine - pitch thread gradually decreases when extending from one end of the nail body towards the end of the nail tip. Its tooth depth in the nail body region is from 0.6 mm to 0.75 mm, and the tooth depth at a position 0.6 mm away from the end of the nail tip is from 0.15 mm to 0.25 mm.

[0014] Based on the above - mentioned solution and as a preferred solution of the above - mentioned solution: The double - thread fine - pitch thread forms double - independent spiral cutting edges at the end of the nail tip, and the extending direction of the cutting edges is consistent with the helix angle of the thread.

[0015] Based on the above - mentioned solution and as a preferred solution of the above - mentioned solution: The transition region between the spiral cutting edge and the adjacent thread profile is a continuous smooth surface.

[0016] Based on the above - mentioned solution and as a preferred solution of the above - mentioned solution: The end edge of the inclined end - face structure forms an annular chamfer.

[0017] Based on the above - mentioned solution and as a preferred solution of the above - mentioned solution: The pitch of the double - thread fine - pitch thread increases from the end of the nail tip towards the nail head.

[0018] The prominent and beneficial technical effects of the present invention compared with the prior art are as follows: Through the innovation of the nail tip structure, the symmetrical layout of the double - thread fine - pitch thread and the dynamic optimization of parameters, the present invention systematically breaks through the technical bottleneck of traditional drywall nails in the construction of high - density materials. Based on the platform - shaped or inclined end - face nail tip design, it significantly reduces the drilling resistance and inhibits slipping and deviation. Combining the symmetrical distribution and the characteristic of decreasing tooth depth gradient of the double - thread fine - pitch thread, it realizes the uniform distribution of the drilling torque and greatly reduces the risk of broken tips; The double - independent spiral cutting edges formed at the cross - section position improve the drilling accuracy and cutting efficiency. With the dynamic increasing design of the pitch, it synchronously optimizes the drilling speed and fixing stability, ensuring a significant enhancement of the anti - pull - out force; It comprehensively improves the construction efficiency and economy, providing an efficient, stable and long - life fastening solution for high - density and composite materials. Description of the Drawings

[0019] Figure 1It is a top view schematic diagram of the high-drilling-speed drywall screw of the present invention;

[0020] Figure 2 It is a front view schematic diagram of the high-drilling-speed drywall screw with a flat top;

[0021] Figure 3 It is a partially enlarged three-dimensional schematic diagram of the tip of the high-drilling-speed drywall screw with a flat top;

[0022] Figure 4 It is a front view schematic diagram of the high-drilling-speed drywall screw with an inclined top;

[0023] Figure 5 It is a partially enlarged two-dimensional schematic diagram of the tip of the high-drilling-speed drywall screw with an inclined top;

[0024] Figure 6 It is a partially enlarged three-dimensional schematic diagram of the tip of the high-drilling-speed drywall screw with an inclined top;

[0025] Figure 7 It is a drilling speed distribution diagram of the drywall screw with a pointed top;

[0026] Figure 8 It is a drilling speed distribution diagram of the high-drilling-speed drywall screw with a flat top;

[0027] Figure 9 It is a drilling speed distribution diagram of the high-drilling-speed drywall screw with an inclined top. Specific embodiments

[0028] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments. However, the specific embodiments and examples described below are for illustrative purposes only and are not limitations on the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. Figure 1 In the description of the present application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0030]

[0031] ​In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] Embodiment 1

[0033] In order to solve the above technical problems, Figure 1-3 As shown, this embodiment designs a high-drilling-speed dry wall nail, whose dimensions are a rod diameter of 3.5mm and an overall length of 25mm. Its structure includes a nail head 1, a nail body 2 and a nail tip 3. The surface of the nail body 2 is provided with a double-line fine thread 6, and the end of the nail tip 3 is a flat end face structure 4, and its cross-section is circular, that is, the end of the nail tip 3 is a circular platform structure with a diameter of 0.2-0.3mm. This structure can increase the initial contact area, reduce the pressure per unit area, inhibit drilling slippage, balance sharpness and strength, and avoid the risk of brittle fracture caused by the excessive thinness of the traditional pointed head. The verticality deviation is ≤0.03mm, which ensures that the drilling force is evenly transmitted along the axis, reduces the eccentric torque, and improves the linear accuracy of drilling.

[0034] The starting points of the double-line fine pitch threads 6 are symmetrically distributed at 180° along the axis of the nail body 2, and the end points of the spiral paths of the two threads terminate symmetrically at the same circumferential position at the end of the nail tip 3, eliminating asymmetric radial forces and solving the problem of nail body 2 deviation caused by the traditional thread layout. The double-line fine pitch threads 6 form double independent spiral cutting edges at the end of the nail tip 3, and the extension direction of the cutting edges is consistent with the thread helix angle. This design allows the formation of dual cutting points that are subjected to synchronous force during the drilling process. The setting of the dual cutting points makes the cutting force distribution more reasonable, reduces the force on a single cutting point, reduces the risk of the nail breaking during the drilling process, and improves the service life and reliability of the nail.

[0035] The tooth depth of the double-line fine thread 6 gradually decreases as it extends from one end of the nail body 2 toward the end of the nail tip 3. The thread depth in the main area of ​​the nail body 2 is 0.67 mm, and the thread depth decreases to 0.16 mm at 0.6 mm from the end of the nail tip 3, thereby gradually releasing the drilling resistance and reducing the peak pressure, avoiding problems such as drilling difficulties or nail breakage caused by a sudden increase in resistance, and making the drilling process more stable and smooth.

[0036] In addition, it is preferred that the surface of the nail tip 3 is plated with a zinc-nickel alloy layer, which reduces the friction coefficient by 15%, improves the wear resistance by 50%, and suppresses surface wear under high load.

[0037] In this embodiment, it is further preferred that the transition region between the spiral cutting edge and the adjacent thread profile is a continuous smooth surface.

[0038] The drill speed test conditions are as follows. The test equipment is a TW-003 type screw attack speed machine, the load is 10.5 kg, the drill speed is 2200 r / min, the test material is thin steel strip, the steel strip material is Q235, the thickness is 0.6 mm, and the drill speed is the time required for a drywall screw to drill through 15 mm of the thin steel strip. 50 drywall screws with pointed tips are selected as the control experiment, and the experimental results are as Figure 7 、 8 shown. It can be seen from the figure that the drill speed of the drywall screw in this embodiment is between 0.22 - 0.3 s. Compared with the comparison samples, the efficiency of the drywall screw designed in this embodiment is significantly improved.

[0039] In addition, the broken tip rate and pull-out resistance tests show that after 1000 insertions, the broken tip rate of the drywall screw of the present invention is 0.4%, while that of the control group is 6.2%. The pull-out resistance reaches 1180 - 1250 N, while that of the control group is 750 - 820 N. Obviously, the high-drill-speed drywall screw of the present invention has stronger gripping force and fixing effect in the material, can effectively resist the pulling-out action of external forces, and at the same time ensure the stability and reliability of the nail during use.

[0040] Embodiment Two

[0041] Different from the above embodiment, as Figure 4-6 shown, in this embodiment, the end of the nail tip 3 is an inclined end face structure 5, and its cross-section is approximately circular, that is, the end of the nail tip 3 is an inclined frustum structure. The angle α between its end face and the horizontal plane can be 5° to 60°, and preferably 15° to 45°. A natural guiding angle is formed, which makes the contact point between the nail tip 3 and the material move forward at the initial stage of drilling, reduces the vertical direction resistance component, helps the cutting edge to better adapt to the internal structure of the material during drilling, reduces the friction and resistance during the cutting process, makes the cutting smoother, and further improves the cutting efficiency. In addition, this structure is especially suitable for the delamination penetration requirements of composite materials (such as gypsum board + light steel keel). The angle design balances sharpness and structural strength. Too small an angle is likely to result in insufficient guiding effect, and too large an angle increases the risk of edge stress concentration.

[0042] As Figure 9 shown, 50 high-drill-speed drywall screws of this type are also selected for testing. The experimental results show that their drill speed performance is very excellent. The time required to drill through the specified thickness of the material is concentrated between 0.18 - 0.28 s. This result is much lower than the drill speed of the drywall screw with a pointed tip, and also higher than the drill speed of the flat-headed drywall screw in Embodiment One. This fully demonstrates the significant advantage of the drywall screw in this embodiment in terms of drill speed performance.

[0043] On the basis of the above embodiments, this embodiment is further improved. An annular chamfer is formed at the end edge of the inclined end face structure 5, which can make the edge of the nail tip 3 smoother, reduce the frictional resistance between the edge and the material during drilling, and reduce the force required for drilling.

[0044] On the basis of the above embodiments, this embodiment is further improved. The pitch of the double-thread fine-pitch thread 6 increases from the end of the nail tip 3 towards the nail head 1 direction, optimizing the chip discharge efficiency, reducing the risk of jamming, adapting to high-speed continuous operation, and the tooth depth gradient and pitch gradient are respectively for resistance release and chip evacuation and bite balance, dynamically matching the material properties to achieve synchronous improvement of drilling speed and fixing strength.

[0045] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. A high-drilling-speed drywall screw, characterized in that: It includes a nail head, a nail body and a nail tip. A double-thread fine-pitch thread is provided on the surface of the nail body. The end of the nail tip is of a flat end face structure or an inclined end face structure.

2. The high-drilling-speed drywall screw according to claim 1, wherein: The starting points of the double-thread fine-pitch thread are symmetrically distributed along the axis of the nail body, and the end points of the spiral paths of the two threads symmetrically terminate at the end face position of the nail tip at the same time.

3. A high-drilling-speed drywall screw according to claim 1, characterized in that: The outer diameter dimension of the nail tip region is from 0.15 mm to 0.35 mm.

4. A high-drilling-speed drywall screw according to claim 1, characterized in that: When the nail tip is of an inclined end face structure, the angle α between its end face and the horizontal plane is from 5° to 60°.

5. A high-drilling-speed drywall screw according to claim 1, characterized in that: The tooth depth of the double-thread fine-pitch thread gradually decreases when extending from one end of the nail body towards the end of the nail tip. Its tooth depth in the nail body region is from 0.6 mm to 0.75 mm, and the tooth depth at a position 0.6 mm away from the end of the nail tip is from 0.15 mm to 0.25 mm.

6. The high-drilling-speed drywall screw according to claim 1, wherein: The double-thread fine-pitch thread forms double independent spiral cutting edges at the end of the nail tip, and the extending direction of the cutting edges is consistent with the helix angle of the thread.

7. A high-drilling-speed drywall screw according to claim 6, characterized in that: The transition region between the spiral cutting edge and the adjacent thread profile is a continuous smooth surface.

8. A high-drilling-speed drywall screw according to claim 1, characterized in that: The end edge of the inclined end face structure forms an annular chamfer.

9. A high-drilling-speed drywall screw according to claim 1, characterized in that: The pitch of the double-thread fine-pitch thread increases from the end of the nail tip towards the nail head.

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