Multifunctional plum screwdriver bit

Abstract

The utility model discloses a multifunctional plum screwdriver bit which comprises a screwdriver rod and two sets of working heads integrally formed at the two ends of the screwdriver rod. The working heads are all plum blossom type working heads, one working head is a conventional plum blossom head, a plurality of main cutting edges are symmetrically arranged at the end of the other working head in a rotating mode, the vertical face of one side of each main cutting edge is a front cutter face, and the inclined face of the other side of each main cutting edge is a rear cutter face. A chip groove is formed in the outer side wall of the other working head and corresponds to the area between the adjacent rear tool faces, a first auxiliary cutting edge and a second auxiliary cutting edge are arranged on the edges of the two sides of the chip groove, one end of the first auxiliary cutting edge extends to the main cutting edge, and one end of the second auxiliary cutting edge extends to the rear tool faces. The drill bit is flexible and convenient to use, can be used for common screws and uncommon screws, and can also be used as an emergency drill bit.

Description

Technical Field

[0001] The utility model belongs to the technical field of screwdriver bits, and particularly relates to a multi-functional plum blossom screwdriver bit. Background Art

[0002] Using a pistol drill in combination with a screwdriver bit to tighten or loosen screws is time-saving and labor-saving. For some conventional screws, using a conventional screwdriver bit can tighten or remove them. However, for some severely corroded screws, their flower-shaped patterns are no longer prominent. At this time, when using a conventional screwdriver bit for disassembly, it is easy to slip and idle, resulting in the ineffective disassembly of the screw, which affects the work progress. In addition, the existing screwdriver bits have a single function and can only disassemble or tighten screws, and the single function cannot cope with sudden emergencies.

[0003] Chinese Patent CN201320379452.6 discloses a screwdriver bit. Although it has two working heads and uses the spiral structure characteristics of the bit rod to avoid premature damage of the bit, its function is relatively single, it cannot cope with the use of irregular screws, and it cannot perform emergency drilling.

[0004] Therefore, how to provide a multi-functional plum blossom screwdriver bit that is flexible and convenient to use is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0005] In view of this, the utility model provides a multi-functional plum blossom screwdriver bit, which can normally screw conventional screws. When an unconventional screw needs to be screwed, use the working head with cutting edges to first machine deeply for a certain distance, and then facilitate the flower shape on the working head to cooperate with the screw to loosen it, completing the disassembly of the unconventional screw. In addition, due to the cutting edge structure on the working head, it can also be used as an emergency drill to punch holes in thin steel plates. Compared with the traditional bit that can only single screw, this product increases the use functions of the bit.

[0006] To achieve the above object, the utility model adopts the following technical scheme: a multi-functional plum blossom screwdriver bit, which includes: a bit rod and a working head, and there are two groups of the working heads, which are integrally formed at both ends of the bit rod;

[0007] The working heads are both plum blossom-shaped working heads. One of the working heads is a conventional plum blossom head, and multiple main cutting edges are symmetrically arranged in a rotational manner at the end of the other working head. One side vertical surface of the main cutting edge is the rake face, and the other inclined surface of the main cutting edge is the flank face. A chip flute is provided on the outer wall of the other working head and corresponding to the area between adjacent flank faces. First secondary cutting edges and second secondary cutting edges are provided on both side edges of the chip flute. One end of the first secondary cutting edge extends to the main cutting edge, and one end of the second secondary cutting edge extends to the flank face.

[0008] The beneficial effects of the present utility model are as follows: The screwdriver bit has two working heads. One is a conventional working head for dealing with the screwing of conventional screws, and the other working head with a cutting edge can be used for unconventional screws. Unconventional screws are those that cannot be normally loosened or tightened by the conventional working head due to rust or other reasons. At this time, the main cutting edge on the working head can increase the depth of the bit into the screw. While increasing the friction force, it is used in combination with the flower shape of the working head to complete the screwing of the screw. In addition, the working head can be used to complete emergency drilling of thin steel plates, increasing the usage functions of the bit.

[0009] Preferably, one end of the first secondary cutting edge close to the bit shank is the first edge end, and one end of the second secondary cutting edge close to the bit shank is the second edge end. The distance from the first edge end to the bit shank is greater than the distance from the second edge end to the bit shank.

[0010] The resulting technical effects are as follows: The first secondary cutting edge is a high edge and is arranged close to the main cutting edge. It can not only drill screws but also perform emergency punching on thin steel plates. The first secondary cutting edge is connected to the main cutting edge, facilitating drilling work.

[0011] Preferably, a friction arc surface is formed between the first secondary cutting edge and the second secondary cutting edge corresponding to the same flank. The diameter size of the outer circular contour where the first edge end is located is larger than the diameter size of the outer circular contour where the second edge end is located.

[0012] The resulting technical effects are as follows: Since the first secondary cutting edge is the main working edge, it is necessary to ensure the machining depth of the first secondary cutting edge and the second secondary cutting edge to facilitate drilling or punching. In addition, the friction arc surface is also convenient for increasing the contact area with the screw, increasing the friction force between the bit and the screw, and facilitating the loosening or tightening of the screw. When tightening, the friction arc surface can be relied on to increase the contact area with the unconventional screw.

[0013] Preferably, the bit shank is a multi-prism body, and a plurality of V-shaped grooves are axially provided on the outer side wall of the bit shank. A long strip-shaped semi-circular card slot is provided at the bottom of the V-shaped groove, and the two side surfaces of the semi-circular card slot can be abutted against the V-shaped tongue on the pistol drill.

[0014] The resulting technical effects are as follows: The semi-circular card slot on the V-shaped groove can increase the contact points between the bit and the V-shaped tongue of the pistol drill, that is, the two side surfaces of each semi-circular card slot can be abutted against the tongue. Compared with the single-point line contact and limiting effect between the inner bottom of the traditional V-shaped groove and the end of the tongue, the limiting effect is better and more stable, and it is not easy to fall off after long-term use.

[0015] Preferably, when rotating counterclockwise, the main cutting edge, the front tool face and the first secondary cutting edge work, and when rotating counterclockwise, the groove surface on one side of the chip fluting near the first secondary cutting edge abuts against the screw. When rotating clockwise, the groove surface on the other side of the discharge groove near the second secondary cutting edge abuts against the screw.

[0016] The resulting technical effect is that the unconventional working head of this product will perform drilling on the screw only when rotating counterclockwise, and will not drill the screw when rotating clockwise. Because the screw is disassembled counterclockwise, when disassembling the unconventional bare lamp, drilling treatment is carried out by relying on the cutting edge on the working head. While increasing the depth, the friction between the bit and the screw is improved, thus facilitating the unscrewing of the unconventional screw. When tightening, the tightening can be completed due to the large-area contact between the friction arc surface and the screw. The two working heads of this product can complete the tightening and loosening processes for different screws. Description of the Drawings

[0017] Figure 1 is the overall structure diagram of a multi-functional plum blossom screwdriver bit of the present invention;

[0018] Figure 2 is the structure diagram of the conventional working head of a multi-functional plum blossom screwdriver bit of the present invention;

[0019] Figure 3 is the structure of the unconventional working head of a multi-functional plum blossom screwdriver bit of the present invention Figure 1 ;

[0020] Figure 4 is the structure of the unconventional working head of a multi-functional plum blossom screwdriver bit of the present invention Figure 2 .

[0021] 1 shank, 2 working head, 3 main cutting edge, 4 front tool face, 5 rear tool face, 6 chip fluting, 7 first secondary cutting edge, 8 second secondary cutting edge, 9 first edge end, 10 second edge end, 11 friction arc surface, 12 V-shaped groove, 13 semi-circular card slot. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Refer to the attached drawings of the present invention Figures 1 to 4, according to an embodiment of the present utility model, a multifunctional plum blossom screwdriver bit includes: a bit rod 1 and a working head 2. There are two groups of working heads 2, which are integrally formed at both ends of the bit rod 1;

[0024] The working heads 2 are both plum blossom type working heads. One of the working heads is a conventional plum blossom head, which can be used to screw conventional screws. At the end of the other working head, a plurality of main cutting edges 3 are arranged in rotational symmetry. One side vertical surface of the main cutting edge 3 is a front cutting surface 4, and the other inclined surface of the main cutting edge 3 is a rear cutting surface 5. Chip removal grooves 6 are provided on the outer wall of this working head and corresponding to the areas between adjacent rear cutting surfaces. It can be understood that this chip removal groove is also the flower-shaped groove of the screwdriver. First secondary cutting edges 7 and second secondary cutting edges 8 are provided on both side edges of the chip removal groove 6. One end of the first secondary cutting edge 7 extends to the main cutting edge 3, and the first secondary cutting edge is connected to the main cutting edge. One end of the second secondary cutting edge 8 extends to the rear cutting surface 5. This working head can be used to screw non-conventional screws. In addition, when drilling a steel plate with a thickness of 1.5 mm to 2 mm, this working head can also be used for emergency drilling.

[0025] In some other embodiments, one end of the first secondary cutting edge 7 close to the bit rod 1 is a first edge tail end 9, and one end of the second secondary cutting edge 8 close to the bit rod 1 is a second edge tail end 10. The distance between the first edge tail end 9 and the bit rod 1 is greater than the distance between the second edge tail end 10 and the bit rod 1. The first secondary cutting edge is a high edge, and the second secondary cutting edge is a low edge. The first secondary cutting edge is also called a side edge, which is the main working edge and can perform drilling operations.

[0026] In some other specific embodiments, a friction arc surface 11 is formed between the first secondary cutting edge 7 and the second secondary cutting edge 8 corresponding to the same rear cutting surface 5. The diameter dimension of the outer circular contour where the first edge tail end 9 is located is greater than the diameter dimension of the outer circular contour where the second edge tail end 10 is located. In this way, there is a larger working edge surface when unscrewing non-conventional screws counterclockwise, and the chip removal groove surface close to the first secondary cutting edge can also better screw out the screw. In some special cases when it is necessary to tighten non-conventional screws, the chip removal groove surface on the side close to the second secondary cutting edge abuts against the screw, and the friction arc surface is used to increase the friction contact area between the bit head and the screw, improving the tightening effect.

[0027] In some other embodiments, the bit rod 1 is a multi-prism body. A plurality of V-shaped grooves 12 are provided on the outer wall of the bit rod 1 corresponding to its axial direction. A long strip-shaped semi-circular card slot 13 is provided at the bottom of the V-shaped groove 12. The two side surfaces of the semi-circular card slot 13 can abut against the V-shaped tongues on the pistol drill, realizing two-point contact between the tongues and the semi-circular card slot, and the clamping effect is better and more stable.

[0028] Specifically, when rotating counterclockwise, it is the process of unscrewing the screw. The main cutting edge 3, the rake face 4, and the first secondary cutting edge 7 work, and the groove surface on the chip fluting side near the first secondary cutting edge 7 abuts against the screw. When rotating clockwise, it is the process of tightening the screw. The groove surface on the other side of the chip fluting near the second secondary cutting edge 8 abuts against the screw. At this time, the main cutting edge does not perform drilling work.

[0029] Compared with traditional screwdriver bits, this product can be used to screw conventional screws, unconventional screws, and can also perform emergency drilling on thin steel plates, thus enriching the usability of the bit.

[0030] Regarding the device and usage method disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For related parts, refer to the description in the method section.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multifunctional plum screwdriver bit, characterized in that: include: A screw rod (1) and a working head (2), wherein the working head (2) has two sets and is integrally formed at both ends of the screw rod (1); The working heads (2) are all plum blossom-shaped working heads, one of which is a conventional plum blossom head, and the end of the other working head is provided with a plurality of main cutting edges (3) arranged rotationally symmetrically, one side vertical surface of the main cutting edge (3) is a front cutting edge (4), and the other side inclined surface of the main cutting edge (3) is a back cutting edge (5), and a chip groove (6) is provided on the outer side wall of the other working head and in the area corresponding to the adjacent back cutting edges, and the two side edges of the chip groove (6) are provided with a first secondary cutting edge (7) and a second secondary cutting edge (8), one end of the first secondary cutting edge (7) extends to the main cutting edge (3), and one end of the second secondary cutting edge (8) extends to the back cutting edge (5).

2. A multifunctional plum screwdriver bit according to claim 1, characterized in that: The end of the first secondary cutting edge (7) close to the bar (1) is a first blade tail end (9), the end of the second secondary cutting edge (8) close to the bar (1) is a second blade tail end (10), and the distance between the first blade tail end (9) and the bar (1) is greater than the distance between the second blade tail end (10) and the bar (1).

3. The multifunctional plum screwdriver bit according to claim 2, characterized in that: A friction arc surface (11) is formed between the first secondary cutting edge (7) and the second secondary cutting edge (8) corresponding to the same flank surface (5), and the outer circle contour diameter size of the first cutting edge tail end (9) is larger than the outer circle contour diameter size of the second cutting edge tail end (10).

4. The multifunctional plum screwdriver bit according to claim 1, characterized in that: The screw rod (1) is a polygonal column, and a plurality of V-shaped grooves (12) are arranged on the outer wall of the screw rod (1) and in the axial direction thereof. The bottom of the V-shaped groove (12) is provided with a long semicircular groove (13), and the groove surfaces on both sides of the semicircular groove (13) can abut against the V-shaped tongue on the pistol drill.

5. A multifunctional plum screwdriver bit according to any one of claims 1 to 4, characterized in that: When rotating counterclockwise, the main cutting edge (3), the front cutting edge (4) and the first secondary cutting edge (7) work, and when rotating counterclockwise, the groove surface on one side of the chip groove close to the first secondary cutting edge (7) abuts against the screw, and when rotating clockwise, the groove surface on the other side of the chip groove close to the second secondary cutting edge (8) abuts against the screw.

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