TWM678751U - screwdriver bit structure - Google Patents

Abstract

This invention discloses a screwdriver bit structure suitable for torque-driven engagement with screws. The screwdriver bit includes a shaft and a head at its end, which has a drive portion that can be designed as Phillips head, slotted head, hexagonal head, or star-shaped to accommodate different types of screw heads. The drive portion has a surface treatment layer to improve its wear resistance, corrosion resistance, and torque transmission stability. This surface treatment layer can be achieved through techniques such as hardening, laser surface strengthening, rolling, polishing, sandblasting, or shot blasting. Therefore, this invention effectively extends the impact fatigue strength and service life of the screwdriver bit, and improves accuracy and safety.

Description

Screwdriver bit structure

This invention relates to the field of tool technology, specifically a screwdriver bit structure with a surface-treated layer that improves screw drive efficiency and extends the durability of the screwdriver bit.

Traditional screwdriver bits or screwdrivers often face the following disadvantages in practical use:

1) Excessive torque or poor contact can easily lead to slippage, breakage, and damage to the screw or screwdriver bit itself;

2) Prolonged use causes the contact surfaces to wear down, affecting accuracy and lifespan;

3) It is prone to rust in humid environments;

4) If the hardness and toughness of a material are not balanced, it is prone to breakage or deformation.

5) Rough surface or insufficient machining precision results in poor torque transmission stability and consistency.

Therefore, existing technologies still have room for improvement in terms of wear resistance, rust prevention, and mechanical stability.

To address the problems of slippage, wear, rust, breakage, and unstable torque transmission encountered by traditional screwdriver bits in practical use, this invention aims to improve the screwdriver bit structure. By increasing the hardness, wear resistance, and corrosion resistance of the drive unit, the service life of the screwdriver bit can be effectively extended, and the stability and driving efficiency during screw engagement can be improved, thereby enhancing user safety and work quality.

To achieve the aforementioned objectives, this invention improves the structure of the screwdriver bit's drive mechanism. The screwdriver bit includes a shaft and a head at its end, which has a drive mechanism. This drive mechanism can be Phillips head, slotted head, hexagonal head, or star-shaped, depending on the application requirements, to accommodate different types of screw grooves. The surface of the drive mechanism has a surface treatment layer, which can be formed through laser strengthening, quenching, rolling, polishing, sandblasting, or shot blasting, thereby improving the durability and torque transmission capability of the drive mechanism. This invention has a simple structure, is easy to manufacture, and is suitable for widespread application in various hand tools and power tools.

To make the purpose, features, and advantages of this invention readily understandable, one or more preferred embodiments are described in detail below with the accompanying diagrams.

10: Screwdriver tip

11: Pole

12: Head

13a, 13b, 13c, 13d: Drive unit

14: Surface treatment layer

20: Screwdriver tools

21: Grip

22: Assembly Hole

24: Neck

25: Nuts

30: Power Tools

31: The Body

32:Output department

Figure 1: A preferred embodiment of this work, showing various different shapes of screwdriver bits.

Figure 2: A magnified view of one of the starter heads in Figure 1, showing the drive unit and surface treatment layer.

Figure 3: A schematic diagram showing the structure of a screwdriver tool formed by combining the screwdriver bit and handle.

Figure 4: A diagram showing the usage of a screwdriver bit connected to a power tool.

Next, with reference to the accompanying drawings, embodiments of this application are described. In the drawings, the same or similar reference numerals denote the same or similar structures or units. It is to be understood that the embodiments described are only part of the examples in this application, not all of them. Other embodiments derived from the described examples, or structures modified or altered as needed, are all within the scope of protection of this application.

In the following description, directional terms such as "up," "down," "left," "right," "front," "back," "inside," "outside," and "side" are used only for reference to the accompanying drawings. The use of directional terms is for the purpose of better and clearer description and understanding of this application, and does not imply that the described device or element must have a specific orientation, structure, or operation; therefore, it should not be construed as a limitation on the technical content of this application.

Unless specifically and expressly defined, in the following description, "installed," "connected," "attached," or "on" should be interpreted broadly, including, for example, fixed connection, detachable connection, integral connection, mechanical connection, direct connection, indirect connection, or connection within two components. Those skilled in the art will, with ordinary knowledge or experience, understand the meaning of these terms in various embodiments, and even in the specific context of this application.

Unless otherwise stated, in the following description, "multiple" means two or more.

As shown in Figure 1, a preferred embodiment of the invention discloses various types of screwdriver bits 10, each having a shaft 11 and a head 12 at one end. The head 12 forms a drive unit. Depending on the different types of recess designs of a screw (not shown), the drive unit has different shapes, including but not limited to: a Phillips head drive unit 13a, a slotted head drive unit 13b, a hexagonal head drive unit 13c, and a hexagonal head drive unit 13d, to achieve torque drive of the corresponding screw.

As shown in Figure 2, the screwdriver bit 10 can be made of alloy steel and subjected to heat treatment and machining to achieve good rigidity and toughness. Each drive part 13a (or 13b, 13c, 13d) is integrally formed with the head 12, and a surface treatment layer 14 is formed on its surface, giving each drive part 13a (or 13b, 13c, 13d) higher hardness and wear resistance.

The surface treatment layer 14 can be disposed in the contact area of the driving part 13a (or 13b, 13c, 13d), including its end face, ridges, groove walls, or tips, to enhance its service life and stability. The surface treatment methods may include, but are not limited to: quenching, laser surface strengthening, rolling, polishing, sandblasting, shot blasting, or plating.

Taking laser surface strengthening as an example, silicon (Si), aluminum (Al), molybdenum (Mo), carbon (C), manganese (Mn), chromium (Cr), vanadium (V), iron (Fe), or other elements can be deposited on the surface of the driving part 13a (or 13b, 13c, 13d). Then, a new alloy layer with a thickness of not less than 0.05 mm is formed by laser melting, thereby improving the wear resistance, corrosion resistance, and heat resistance of that part.

As shown in Figure 3, the screwdriver bit 10 can be combined with a handle 21 to form a screwdriver tool 20. The handle 21 has an assembly hole 22 for inserting and securing the bit 10. The handle 21 has a threaded neck 24, which is screwed onto and secured to the screwdriver bit 10 with a nut 25, allowing a user to easily disassemble and replace different types of screwdriver bits 10 as needed.

In other embodiments, the lever 11 may be integrally formed with the handle, constituting a non-removable screwdriver tool, which is also within the scope of this invention.

As shown in Figure 4, the screwdriver bit 10 is coupled to a power tool 30 to perform tightening or loosening actions. The power tool 30 includes a body 31 equipped with at least one battery (not shown) that provides power to an output 32 of the body 31 to turn the screwdriver bit 10. A lever 11 is mounted on the output 32 and drives a drive unit 13a to tighten or loosen screws (not shown).

Without departing from the broad concept of this application, those skilled in the art can understand and modify the aforementioned embodiments. Therefore, this application is not limited to the specific embodiments disclosed in the specification; all modifications made in accordance with the spirit and scope of this application shall be covered and protected by the text defined in the patent application.

10: Screwdriver tip

12: Head

13a: Drive Unit

14: Surface treatment layer

Claims (3)

A screwdriver bit structure includes: A pole (11), one end of which is connected to a head (12); The head (12) forms a drive part (13a, 13b, 13c or 13d) for insertion into a screw recess; and The drive unit (13a, 13b, 13c, or 13d) has a surface treatment layer (14) to improve its wear resistance and corrosion resistance. The screwdriver bit structure as described in claim 1, wherein the surface treatment layer (14) covers the ridges, end faces, or grooves of the drive portion (13a, 13b, 13c, or 13d). As described in claim 1, the screwdriver bit structure wherein the surface treatment layer (14) is an alloy layer formed by laser treatment, wherein silicon (Si), aluminum (Al), molybdenum (Mo), carbon (C), manganese (Mn), chromium (Cr), vanadium (V), iron (Fe), or other elements are pre-deposited on the surface of the drive part (13a, 13b, 13c, or 13d) to form an alloy layer with a thickness of not less than 0.05 mm.