A screw magnetizing bit tool

Abstract

The utility model discloses a screw strong magnet head tool relates to hardware tool technical field, including hexagonal support handle, the bottom fixed connection of hexagonal support handle has the connecting section, the bottom fixed connection of connecting section has the head main part, the outside wall screw thread connection of connecting section has the protective sleeve subassembly, the cavity of protective sleeve subassembly is from top to bottom and is connected with first fluorine rubber washer, detachable strong magnet ring and second fluorine rubber washer in proper order. The hexagonal support handle provided by the utility model realizes wear -resisting and buffer protection under the basis of being convenient for the replacement of strong magnet ring to the magnetic attraction structure dismounting opening, thereby solve the inconvenient dismounting opening of the existing screw strong magnet head tool to replace after the strong magnet ring attenuation / failure of magnetic attraction structure, and the problem that the simple protection makes the head easy to wear, the tool impact easy to lose magnetic attraction component.

Description

Technical Field

[0001] This utility model relates to the field of hardware tools technology, specifically to a screwdriver bit with strong magnetic tip. Background Technology

[0002] A screwdriver bit with strong magnetic attachment is a tool accessory that uses a built-in or external strong magnetic component to attract metal screws and connects to a power or manual tool via a hexagonal shank or similar structure, enabling convenient tightening and loosening of screws.

[0003] Most existing magnetic screwdriver bits feature an integrated, fixed magnetic structure. When the magnetic ring weakens or fails due to prolonged use, the entire bit must be disassembled. This disassembly requires specialized tools, is cumbersome, and can easily damage the bit body. While some products have a channel for replacing the magnetic ring, they lack convenient opening and closing mechanisms, making it easy for the magnetic ring to fall off or be misaligned during replacement. This results in low replacement efficiency and fails to meet users' needs for quickly restoring magnetic functionality. Especially in high-intensity work scenarios, frequent tool downtime for replacement significantly reduces work efficiency. Furthermore, traditional magnetic screwdriver bits have rudimentary protective structures, making the bit body and magnetic components susceptible to external environmental influences. On one hand, the contact area between the bit and the screw lacks wear-resistant protection, leading to dimensional wear due to friction after prolonged use, affecting compatibility with screws. On the other hand, when the tool is dropped or impacted, the lack of external cushioning and internal anti-collision design makes the magnetic components prone to damage or displacement. Utility Model Content

[0004] In view of the problems existing in the current screwdriver bit with strong magnetic bit, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a screwdriver bit tool with strong magnetic properties, which solves the problems of existing screwdriver bit tools where it is inconvenient to disassemble and open for replacement after the strong magnetic ring of the magnetic attraction structure weakens / fails, and the poor protection makes the bit easy to wear and the magnetic attraction component easily damaged by impact.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A screwdriver bit tool with strong magnetic properties includes a hexagonal support handle, a connecting section fixedly connected to the bottom of the hexagonal support handle, a bit body fixedly connected to the bottom of the connecting section, a protective sleeve assembly threadedly connected to the outer side wall of the connecting section, and a first fluororubber washer, a detachable strong magnetic ring, and a second fluororubber washer sequentially snapped into the cavity of the protective sleeve assembly from top to bottom. A limiting mechanism is provided between the top of the protective sleeve assembly and the connecting section. A No. 45 steel reinforcing rib is fixedly connected inside the cavity of the hexagonal support handle. The protective sleeve assembly includes an upper connecting shell. A lower support shell is snapped into the bottom of the upper connecting shell. A locking mechanism is provided between the upper connecting shell and the lower support shell. A screw slot is opened at the bottom of the lower support shell, and a high-strength protective pad is fixedly connected thereto.

[0007] Preferably, the limiting mechanism includes a threaded limiting port, a reserved hole, and limiting screws. The top of the upper connecting shell is provided with a threaded limiting port around its perimeter, and the top of the connecting section is provided with a reserved hole around its perimeter. Limiting screws are slidably connected thereto. One end of each limiting screw passes through the reserved hole and is threadedly connected to the corresponding threaded limiting port.

[0008] Preferably, the locking mechanism includes an arc-shaped positioning groove, an arc-shaped positioning piece, a locking threaded opening, and a locking screw. The bottom of the upper connecting shell is provided with an arc-shaped positioning groove around its perimeter, and the top of the lower supporting shell is fixedly connected with an arc-shaped positioning piece around its perimeter. Each arc-shaped positioning piece is inserted into the corresponding arc-shaped positioning groove. The four sides of the upper connecting shell and the arc-shaped positioning pieces around its perimeter are provided with corresponding locking threaded openings, and locking screws are threadedly connected to them.

[0009] Preferably, the high-strength protective pad is a polytetrafluoroethylene annular pad with anti-slip texture on its surface.

[0010] Furthermore, the inner walls of the upper connecting shell and the lower supporting shell are sequentially fixedly connected with a brass protective layer and a rubber buffer layer from the inside to the outside.

[0011] Preferably, the outer surfaces of the hexagonal support handle and the connecting section are coated with a black ceramic coating, the outer surfaces of the upper connecting shell and the lower support shell are coated with an aluminum-based oxide film anodized coating, and the inner sidewalls of the upper connecting shell and the lower support shell are coated with a nickel-iron alloy anti-magnetic leakage coating.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model utilizes a split design of the upper connecting shell and the lower supporting shell, along with a locking mechanism, to quickly disassemble and assemble the protective sleeve assembly, enabling the individual replacement of the detachable strong magnetic ring. This increases replacement efficiency by 3 times. Compared to traditional integrated magnetic screwdriver bits, it avoids the complete scrapping of the tool after the strong magnetic ring decays or fails, and solves the problem of difficult replacement of traditional magnetic structures.

[0013] 2. This utility model utilizes the protective sleeve assembly to form a sealed space, which, together with the first and second fluororubber gaskets, achieves sealing protection. The inner brass protective layer and the rubber buffer layer form a composite buffer structure, which can absorb 40% of radial impact force, attenuate 70% of axial vibration, extend the service life of the strong magnetic ring by 2 times, and reduce the wear rate of the bit by 80% using the high-strength protective pad. The overall tool durability is increased to more than 8,000 working cycles.

[0014] 3. This utility model utilizes a detachable strong magnetic ring combined with a nickel-iron alloy anti-magnetic leakage coating to increase screw adsorption force by 20% and reduce slippage rate by 95%. The black ceramic coating and aluminum-based oxide film coating make the tool resistant to salt spray corrosion for up to 500 hours and have an insulation breakdown voltage of ≥500V. The limiting mechanism ensures that the torsional resistance of the protective sleeve is increased by 80%, making it suitable for complex working environments such as oil, humidity, and high altitudes, and ensuring operational safety and accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a three-dimensional exploded view of the protective sleeve assembly of this utility model; Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of part A.

[0017] Explanation of reference numerals in the attached figures: 1. Hexagonal support handle; 2. Connecting section; 3. Bit body; 4. Protective sleeve assembly; 5. First fluororubber washer; 6. Removable strong magnetic ring; 7. Second fluororubber washer; 8. 45# steel reinforcing rib; 9. Upper connecting shell; 10. Lower support shell; 11. Screw slot; 12. High-strength protective pad; 13. Threaded limit port; 14. Reserved hole; 15. Limiting screw; 16. Arc-shaped positioning groove; 17. Arc-shaped positioning piece; 18. Locking threaded port; 19. Locking screw; 20. Anti-slip texture; 21. Brass protective layer; 22. Rubber buffer layer. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] This utility model discloses a screwdriver bit with strong magnetic tip.

[0020] This utility model provides, for example Figure 1-4 The screwdriver bit tool shown includes a hexagonal support handle 1, a connecting section 2 fixedly connected to the bottom of the hexagonal support handle 1, a bit body 3 fixedly connected to the bottom of the connecting section 2, a protective sleeve assembly 4 threadedly connected to the outer side wall of the connecting section 2, and a first fluororubber washer 5, a detachable strong magnetic ring 6 and a second fluororubber washer 7 sequentially snapped into the cavity of the protective sleeve assembly 4 from top to bottom. A limiting mechanism is provided between the top of the protective sleeve assembly 4 and the connecting section 2. A No. 45 steel reinforcing rib 8 is fixedly connected inside the cavity of the hexagonal support handle 1. The protective sleeve assembly 4 includes an upper connecting shell 9, and a lower support shell 10 is snapped into the bottom of the upper connecting shell 9. A locking mechanism is provided between the upper connecting shell 9 and the lower support shell 10. A screw slot 11 is provided at the bottom of the lower support shell 10, and a high-strength protective pad 12 is fixedly connected thereto. The protective sleeve assembly 4 is used to wrap the connecting section 2 through a threaded connection to form a sealed protective space. The first fluororubber gasket 5 and the second fluororubber gasket 7 (temperature resistance -40~200℃) have excellent elasticity and can buffer the axial vibration of the detachable strong magnetic ring 6. At the same time, they seal the inside of the protective sleeve assembly 4 to prevent oil stains from seeping in and affecting the magnetic performance. The strong magnetic ring 6 (magnetic strength ≥12000Gs) adopts a modular design and can be disassembled and replaced individually, solving the problem of traditional magnetic screwdriver bits requiring complete scrapping after the strong magnetic ring fails. A 45# steel reinforcing rib 8 is axially positioned along the hexagonal support handle 1 to enhance the handle's bending resistance. The separate design of the upper connecting shell 9 and lower support shell 10 facilitates the disassembly and replacement of the internal strong magnetic ring and washer. A locking mechanism ensures a secure connection between the upper connecting shell 9 and lower support shell 10, preventing separation due to impact. A high-strength protective pad 12 isolates the screwdriver bit body 3 from hard contact with the screw, reducing bit wear. The synergistic effect of multiple components comprehensively improves the tool's structural stability and durability, thus solving the problems of existing screwdriver bits where, after the strong magnetic ring weakens / fails, disassembly and replacement are inconvenient, and the inadequate protection makes the bit prone to wear and the magnetic components easily damaged by impact.

[0021] To prevent the protective sleeve assembly from rotating relative to the connecting section or from falling off, such as Figure 1-4As shown, the limiting mechanism includes a threaded limiting port 13, a reserved hole 14, and a limiting screw 15. The top of the upper connecting shell 9 is provided with threaded limiting ports 13 around its perimeter, and the top of the connecting section 2 is provided with reserved holes 14 around its perimeter, and the limiting screws 15 are slidably connected thereto. One end of each limiting screw 15 passes through the reserved hole 14 and is threadedly connected to the corresponding threaded limiting port 13. The threaded limiting port 13 and the limiting screw 15 cooperate to form a circumferential limiting. Combined with the threaded connection of the connecting section 2, the torsional resistance of the protective sleeve assembly 4 is increased by 80%. The reserved hole 14 ensures that the axis of the limiting screw 15 is precisely aligned with the threaded limiting port 13. The limiting screw 15 is made of 8.8 grade high-strength bolt, which can withstand an axial tensile force of more than 20N without loosening.

[0022] To achieve quick assembly and disassembly and precise positioning of the upper connecting shell and the lower supporting shell, such as Figure 1-4 As shown, the locking mechanism includes an arc-shaped positioning groove 16, an arc-shaped positioning piece 17, a locking threaded opening 18, and a locking screw 19. The bottom of the upper connecting shell 9 is provided with an arc-shaped positioning groove 16 around its perimeter, and the top of the lower support shell 10 is fixedly connected with an arc-shaped positioning piece 17 around its perimeter. Each arc-shaped positioning piece 17 is inserted into the corresponding arc-shaped positioning groove 16. The four sides of the upper connecting shell 9 and the arc-shaped positioning pieces 17 are provided with corresponding locking threaded openings 18, and the locking screws 19 are threadedly connected to them. By using the arc-shaped positioning groove 16 and the arc-shaped positioning piece 17 to insert into each other, the upper connecting shell 9 and the lower support shell 10 can be quickly positioned, ensuring that the coaxiality of the upper and lower shells is ≤0.1mm. By using the locking threaded opening 18 and the locking screw 19 to cooperate, the shell connection strength is enhanced by radial tightening.

[0023] To enhance the anti-slip performance and wear resistance of the screw slot, such as Figure 2 and 4 As shown, the high-strength protective pad 12 is a polytetrafluoroethylene (PTFE) ring pad with anti-slip texture 20 on its surface. The PTFE material has a friction coefficient of ≤0.04, and its wear resistance is 5 times that of ordinary rubber pads, extending its service life to more than 8,000 cycles. The anti-slip texture 20 (depth 0.3-0.5mm, spacing 1mm) increases the friction with the screw head, reducing the screw slippage rate by 95%, making it especially suitable for oily and humid environments. The ring structure wraps around the edge of the screw slot 11, preventing edge breakage caused by hard contact between the bit body 3 and the screw. The high-strength protective pad improves the stability of screw loading and unloading and extends the bit's life.

[0024] To buffer external impacts and protect the internal strong magnetic components, such as Figure 2 and 4As shown, the inner walls of the upper connecting shell 9 and the lower supporting shell 10 are fixedly connected with a brass protective layer 21 and a rubber buffer layer 22 from the inside to the outside. The brass protective layer 21 (thickness 0.2-0.3mm) has excellent ductility and can absorb 40% of the radial impact force to prevent the detachable strong magnetic ring 6 from being broken by collision. The rubber buffer layer 22 (Shore hardness 50HA) can attenuate 70% of the axial vibration to avoid the strong magnetic ring from weakening due to high frequency vibration. The double-layer protective structure improves the impact resistance of the protective sleeve assembly 4 by 2 times, making it suitable for high-intensity industrial operation scenarios.

[0025] To improve the overall weather resistance, wear resistance, and anti-magnetic interference capability of tools, such as Figure 1-4 As shown, the outer surfaces of the hexagonal support handle 1 and the connecting section 2 are coated with a black ceramic coating. The outer surfaces of the upper connecting shell 9 and the lower support shell 10 are coated with an aluminum-based oxide film anodized coating. The inner walls of the upper connecting shell 9 and the lower support shell 10 are coated with a nickel-iron alloy anti-magnetic leakage coating. The black ceramic coating (hardness ≥9H) improves the wear resistance of the support handle and the connecting section by 3 times and the salt spray corrosion resistance for more than 500 hours, making it suitable for use in outdoor humid and saline-alkali environments. The aluminum-based oxide film coating (thickness 10-15μm) improves the scratch resistance of the protective cover surface by 2 times and reduces the surface scratch rate by 80%. It also has insulation properties (breakdown voltage ≥500V) to prevent leakage when the tool is energized. The nickel-iron alloy anti-magnetic leakage coating can control the magnetic field leakage rate to within 5%, enhance the attraction force on the screw (attraction force increased by 20%), and prevent magnetic field interference with precision electronic components (such as circuit boards and sensors).

[0026] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A screwdriver bit with strong magnetic properties, comprising a hexagonal support handle (1), characterized in that, The bottom of the hexagonal support handle (1) is fixedly connected to a connecting section (2), the bottom of the connecting section (2) is fixedly connected to a bit body (3), the outer side wall of the connecting section (2) is threadedly connected to a protective sleeve assembly (4), and the cavity of the protective sleeve assembly (4) is sequentially snapped with a first fluororubber gasket (5), a detachable strong magnetic ring (6), and a second fluororubber gasket (7) from top to bottom. A limiting mechanism is provided between the top of the protective sleeve assembly (4) and the connecting section (2). A No. 45 steel reinforcing rib (8) is fixedly connected inside the cavity of the hexagonal support handle (1). The protective sleeve assembly (4) includes an upper connecting shell (9). A lower support shell (10) is snapped into the bottom of the upper connecting shell (9). A locking mechanism is provided between the upper connecting shell (9) and the lower support shell (10). A screw slot (11) is opened at the bottom of the lower support shell (10), and a high-strength protective pad (12) is fixedly connected thereto.

2. The screwdriver bit with strong magnetic force according to claim 1, characterized in that, The limiting mechanism includes a threaded limiting port (13), a reserved hole (14), and a limiting screw (15). The upper connecting shell (9) has a threaded limiting port (13) around its top, and the connecting section (2) has a reserved hole (14) around its top, and a limiting screw (15) is slidably connected thereto. One end of each limiting screw (15) passes through the reserved hole (14) and is threadedly connected to the corresponding threaded limiting port (13).

3. The screwdriver bit with strong magnetic force according to claim 1, characterized in that, The locking mechanism includes an arc-shaped positioning groove (16), an arc-shaped positioning piece (17), a locking threaded opening (18), and a locking screw (19). The bottom of the upper connecting shell (9) is provided with an arc-shaped positioning groove (16), and the top of the lower support shell (10) is fixedly connected with an arc-shaped positioning piece (17). Each arc-shaped positioning piece (17) is inserted into the corresponding arc-shaped positioning groove (16). The four sides of the upper connecting shell (9) and the arc-shaped positioning pieces (17) are provided with corresponding locking threaded openings (18), and are threaded with locking screws (19).

4. A screwdriver bit with strong magnetic properties according to claim 1, characterized in that, The high-strength protective pad (12) is a polytetrafluoroethylene ring pad, and the surface is provided with anti-slip texture (20).

5. A screwdriver bit with strong magnetic properties according to claim 1, characterized in that, The inner walls of the upper connecting shell (9) and the lower supporting shell (10) are fixedly connected with a brass protective layer (21) and a rubber buffer layer (22) from the inside to the outside.

6. A screwdriver bit with strong magnetic properties according to claim 1, characterized in that, The outer surfaces of the hexagonal support handle (1) and the connecting section (2) are both coated with a black ceramic coating. The outer surfaces of the upper connecting shell (9) and the lower support shell (10) are both coated with an aluminum-based oxide film anodic oxide coating. The inner walls of the upper connecting shell (9) and the lower support shell (10) are both coated with a nickel-iron alloy antimagnetic leakage coating.

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