Anti-slip driver

Abstract

The utility model discloses an anti -skidding bit, including the bit rod, has at least one working end on the bit rod, the working end has the torque transmission surface for with screw groove lateral wall cooperation to deliver the torque, the torque transmission surface is integrally projected and is equipped with the locking tooth of point shape. The utility model discloses an anti -skidding bit structure design is reasonable, can effectively strengthen its locking force between screw groove, effectively improves the problem of skidding that appears in the use process, has good practicality and generalizability.

Description

Technical Field

[0001] This utility model belongs to the field of screwdriver bits, specifically relating to an anti-slip screwdriver bit. Background Technology

[0002] Screwdriver bits, also known as screwdriver tips or screwdriver nozzles, are typically made of high-strength alloy steel and are replaceable tool accessories attached to the handles of electric screwdrivers, pneumatic screwdrivers, or manual screwdrivers. Their core function is to engage the specific shaped working end (such as slotted, Phillips, or hexagonal) with the corresponding slot on the screw head (such as slotted, Phillips, or hexagonal slots), effectively transmitting the rotational torque generated by the tool to the screw to tighten or loosen it. In actual operation, especially when the tightening torque is high, the screw is rusty, the screw groove is worn, or it is contaminated with oil, the bit is very prone to slipping out of the screw groove. Once slippage occurs, it causes a series of problems: firstly, it interrupts operation and reduces work efficiency; secondly, the impact force at the moment of slippage can wear down or even damage the screw groove, increasing the difficulty of operation and easily rendering the screw unusable. Currently, most screwdriver bits on the market improve wear resistance by increasing the hardness of the material itself or by simply sandblasting the surface of the working end to increase roughness. However, these methods have limited effectiveness: increasing hardness cannot change the nature of slipping; and the micro-rough surface produced by sandblasting will be worn away after several uses, failing to provide a durable and reliable anti-slip effect. Summary of the Invention

[0003] In response to this issue, this utility model provides an anti-slip bit. By improving its structure, it can effectively enhance the locking force between itself and the screw slot, thereby effectively improving the slippage problem that occurs during use, and it also has excellent durability.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This utility model provides an anti-slip screwdriver bit, including a bit rod with at least one working end; the working end has a torque transmission surface for cooperating with the side wall of the screw groove to transmit torque; the torque transmission surface is integrally provided with dot-shaped locking teeth.

[0006] Preferably, the torque transmission surface is provided with a plurality of locking teeth.

[0007] Preferably, the plurality of locking teeth are distributed in a rectangular array on the torque transmission surface.

[0008] Preferably, the bit rod and the working end are integrally formed.

[0009] Preferably, the locking tooth is conical, and its cross-sectional area gradually increases from the tip to the root.

[0010] Preferably, the height of the protruding locking tooth is 0.2~0.5mm.

[0011] Preferably, the bit rod has a working end at one end and a mounting end at the other end for connection with a power tool.

[0012] Preferably, the mounting end is a prism with a positioning slot; the positioning slot is an annular groove.

[0013] Preferably, the working ends are provided at both opposite ends of the bit rod.

[0014] Preferably, the working end is in the shape of a straight line, a hexagon, or a cross.

[0015] The positive effects of this invention are as follows: The bit structure in this invention is optimized, resulting in excellent anti-slip properties. In practical use, when the working end of the bit is inserted into the screw slot and rotated under axial pressure, the presence of the locking teeth transforms the traditional surface-to-surface contact between the torque transmission surface and the screw slot sidewall into a point-to-surface contact. The locking tooth tip generates greater pressure under pressure, pressing into the screw slot sidewall to form a microscopic mechanical engagement. Simultaneously, the gap between the teeth can store metal chips, preventing them from affecting the engagement effect. This design significantly increases the coefficient of friction, enabling a reliable locking force between the torque transmission surface and the screw slot sidewall, thus meeting high torque transmission requirements and effectively improving slippage. Furthermore, the locking teeth are not easily worn and have good durability. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art are briefly introduced below. Similar elements or parts in the drawings are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the anti-slip bit in this utility model.

[0018] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0019] The attached figures are labeled as follows: 1. Bit rod; 11. Working end; 12. Torque transmission surface; 13. Locking tooth; 14. Mounting end; 15. Positioning slot. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0022] The structure of the anti-slip bit in this embodiment of the utility model is as follows: Figure 1 and Figure 2 As shown, it includes a bit holder 1, which has at least one working end 11. The working end 11 can be a slotted, hexagonal, or Phillips head shape, etc., to match the screw groove. The working end 11 has a torque transmission surface 12 for engaging with the sidewall of the screw groove to transmit torque. The torque transmission surface 12 has integrally protruding dot-shaped locking teeth 13. When the working end 11 of the bit is inserted into the screw groove and rotated under axial pressure, the presence of the locking teeth 13 can change the surface-to-surface contact between the torque transmission surface 12 and the sidewall of the screw groove in the traditional bit to a point-to-surface contact. The tip of the locking teeth 13 generates greater pressure under pressure, which can press into the sidewall of the screw groove to form a micro-mechanical engagement. At the same time, the gap between the teeth can store metal chips, preventing the chips from affecting the engagement effect. This design significantly increases the coefficient of friction, so that a reliable locking force is generated between the torque transmission surface 12 and the sidewall of the screw groove, thereby meeting the high torque transmission requirements and effectively improving the slippage problem. Moreover, the locking teeth 13 and the torque transmission surface 12 are integrally formed, which is not easy to wear and has good durability. In this application, the protrusion height of the locking tooth 13 is preferably set to 0.2~0.5mm (such as 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc.). This height range is reasonable and ensures that the locking tooth 13 has sufficient pressing depth, which can form obvious mechanical engagement with the side wall of the screw groove and significantly increase the anti-slip friction.

[0023] Furthermore, the torque transmission surface 12 is provided with multiple locking teeth 13. Through the synergistic action of these locking teeth, multiple mechanical engagement points are formed with the sidewall of the screw groove during operation, significantly increasing the overall friction coefficient of the contact interface and improving the anti-slip effect. Preferably, the multiple locking teeth 13 are distributed in a rectangular array on the torque transmission surface 12. This not only improves aesthetics, but also creates a uniform chip-holding space between the regularly arranged teeth, which helps to temporarily store metal chips generated by cutting or wear and facilitates their discharge, preventing chip accumulation from affecting the engagement interface.

[0024] In some embodiments, the bit rod 1 and the working end 11 are integrally formed. The integrally formed structure eliminates the connection weaknesses and potential breakage risks caused by pressing or welding the working end 11 to the bit rod 11 in the traditional split design, ensuring that the torque transmission path is continuous and complete under high torque or impact load, effectively enhancing the mechanical strength and durability of the product.

[0025] See Figure 2 As shown, the locking tooth 13 is conical, with its cross-sectional area gradually increasing from the tip to the root. The relatively sharp tip ensures excellent cutting ability, while the thick root provides strong holding force, so that the locking tooth 13 can maintain its shape and function throughout the entire working cycle, achieving the best balance between cutting ability and service life.

[0026] In some implementations, the bit holder 1 has a working end 11 at one end and a mounting end 14 at the other end; the mounting end 14 is used to connect to the chuck of a power tool (such as an electric drill) to mount the bit on the power tool for use.

[0027] like Figure 1 As shown, the mounting end 14 is a prism with a positioning slot 15 on it; the positioning slot 15 is an annular groove; when in use, the chuck of the power tool clamps the prism-shaped mounting end 14 and forms a locking engagement with the positioning slot 15, which can ensure the firmness of the bit installation and at the same time efficiently transmit the high torque output of the power tool.

[0028] In another embodiment, the bit rod 1 is provided with working ends 11 at both ends, and the working ends 11 at both ends can be the same shape or different shapes.

[0029] For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this invention still fall within the protection scope of this invention.

Claims

1. A non-slip screwdriver bit, comprising a bit shank (1) having at least one working end (11); the working end (11) having a torque transmission surface (12) for engaging with a screw slot sidewall to transmit torque; characterized in that, The torque transmission surface (12) is integrally provided with dot-shaped locking teeth (13).

2. The anti-slip bit according to claim 1, characterized in that, The torque transmission surface (12) is provided with a plurality of locking teeth (13).

3. The anti-slip bit according to claim 2, characterized in that, Multiple locking teeth (13) are distributed in a rectangular array on the torque transmission surface (12).

4. The anti-slip bit according to claim 1, characterized in that, The bit rod (1) and the working end (11) are integrally formed.

5. The anti-slip bit according to claim 1, characterized in that, The locking tooth (13) is conical, and its cross-sectional area gradually increases from the tip to the root.

6. The anti-slip bit according to claim 1, characterized in that, The height of the protrusion of the locking tooth (13) is 0.2~0.5mm.

7. The anti-slip bit according to claim 1, characterized in that, The bit rod (1) has a working end (11) at one end and an installation end (14) at the other end for connecting to a power tool.

8. The anti-slip bit according to claim 7, characterized in that, The mounting end (14) is a prism with a positioning slot (15) on it; the positioning slot (15) is an annular groove.

9. The anti-slip bit according to claim 1, characterized in that, The bit rod (1) has working ends (11) at both ends.

10. The anti-slip bit according to claim 1, characterized in that, The working end (11) is in the shape of a straight line, a hexagon, or a cross.

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