CN215424922U - Drill bit - Google Patents

Abstract

The utility model relates to a drill bit, the drill bit has relative work end and exposed core along its axis direction, the drill bit certainly the work end to the exposed core has set gradually drill point, cutting part, chip removal portion and drilling rod, the drill point structure be with the toper structure that the drill bit coaxial line set up, the cutting part includes the edge a plurality of cutting edges of the circumference interval arrangement of drill bit, and is a plurality of the cutting part of cutting edge all connect in the lateral wall of drill point, adjacent two first chip groove has between the cutting edge, chip removal portion is including setting up a plurality of spiral chip grooves side by side and extending in the same direction, and is a plurality of spiral chip groove and a plurality of first chip groove one-to-one communicates. Through above-mentioned technical scheme, this disclosure can solve the problem that drilling position precision is low among the correlation technique.

Description

Drill bit

Technical Field

The disclosure relates to the technical field of medical instruments, in particular to a drill bit.

Background

In the existing surgical operation, most of the common conical drills are used for directly drilling holes in bones, but during drilling, the holes are easily affected by the body positions of patients or the positions of other equipment, so that the central axis of the conical drill cannot be perpendicular to the surfaces of the bones, the conical drill can swing during hole drilling, further, the actual drilling position and the expected drilling position have deviation, the drilling precision is low, a certain distance exists between the hole and a focus, the entry path of a surgical instrument completely deviates from the expected path, finally, the surgical instrument cannot accurately reach the focus position, the success rate of the operation is greatly affected, irrecoverable results can be caused, and the requirements of the operation cannot be met.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a drill capable of solving the problem of low accuracy of a drilling position in the related art.

In order to realize above-mentioned purpose, this disclosure provides a drill bit, the drill bit has relative work end and holder along its axis direction, the drill bit certainly the work end to the holder has set gradually drill point, cutting part, chip removal portion and drilling rod, the drill point structure be with the toper structure that the drill bit coaxial line set up, the cutting part includes the edge a plurality of cutting edges of the circumference interval arrangement of drill bit, and is a plurality of the cutting part of cutting edge all connect in the lateral wall of drill point, adjacent two first chip removal groove has between the cutting edge, chip removal portion is including setting up a plurality of spiral chip removal grooves side by side and extending with the same direction, and is a plurality of spiral chip removal groove and a plurality of first chip removal groove one-to-one intercommunication.

Optionally, the taper angle of the drill tip is acute.

Optionally, the edge of the cutting edge is configured to be linear, and an included angle between the edge and the axis of the drill is larger than a conical half angle of the drill tip.

Optionally, a plurality of the cutting edges are arranged evenly and at intervals along the circumference of the drill.

Optionally, the cutting edge has first side and second side along its cutting direction, first chip groove forms the cutting edge first side, the cutting edge second side with adjacent with it spiral chip groove between have the chip removal guide face for guide the partial remnant after the cutting to corresponding in the spiral chip groove.

Optionally, a spiral protrusion is formed between two adjacent spiral chip grooves, and the chip removal guide surface is formed on the spiral protrusion.

Optionally, the helical projection has a land on an outer wall thereof.

Through above-mentioned technical scheme, this disclosure provides a drill bit promptly, the tip that is the toper structure and the cutting part through a plurality of cutting edges all connect in the lateral wall of tip through the setting of the work end at the drill bit, can solve the problem that drilling position precision is low among the correlation technique. In specific work, when using the drill bit, for example, when using this drill bit to bore hole to the human bone, can accurately fix a position the position of waiting to bore hole fast through the most advanced of drill point, and construct the drill point for the toper structure, the in-process of drill point pre-drilling can make the axis of drill point or drill bit the bone surface of waiting to bore hole position perpendicular to all the time, and all connect in the lateral wall of drill point because of the cutting part of a plurality of cutting edges, can directly switch to the cutting portion and bore hole after drill point pre-drilling, be favorable to the smooth and easy nature of smooth transition and assurance drilling of drilling, make and still can guarantee the drilling direction unchangeable after switching to the cutting portion drilling. Therefore, the problem that drilling position precision is low among the correlation technique can be solved to this disclosure to can insert the surface of people's bone for example fast, be difficult to skid, can improve the precision of fixed point drill chip.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a perspective view of a drill bit provided in an exemplary embodiment of the present disclosure;

FIG. 2 is an enlarged partial schematic view of the location A in FIG. 1;

FIG. 3 is a perspective view of another angle of a drill bit provided in an exemplary embodiment of the present disclosure;

FIG. 4 is an enlarged partial schematic view of the location B in FIG. 3;

FIG. 5 is a bottom view of a drill bit provided in an exemplary embodiment of the present disclosure;

fig. 6 is a schematic view of the angles between the axis of the drill bit and the blade and the drill tip provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-drilling a tip; 2-a drill rod; 3-a cutting edge; 301-a first side; 302-a second side; 4-a first flute; 5-spiral chip grooves; 6-chip removal guide surface; 7-a spiral protrusion; 8-edge zone.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional terms such as "inner and outer" refers to inner and outer relative to the profile of the component or structure itself, unless stated to the contrary. In addition, it should be noted that terms such as "first", "second", and the like are used for distinguishing one element from another, and have no order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.

In a particular embodiment of the present disclosure, a drill bit is provided. Referring to fig. 1 to 6, the drill bit has relative work end and exposed core along its axis direction, the drill bit has set gradually drill point 1 to the exposed core from the work end, the cutting portion, chip removal portion and drilling rod 2, drill point 1 constructs the toper structure that sets up with the drill bit coaxial line, the cutting portion includes a plurality of cutting edges 3 along the circumference interval arrangement of drill bit, the cutting part of a plurality of cutting edges 3 all connects in the lateral wall of drill point 1, first chip groove 4 has between two adjacent cutting edges 3, chip removal portion is including a plurality of spiral chip grooves 5 that set up side by side and syntropy extend, a plurality of spiral chip grooves 5 and a plurality of first chip grooves 4 one-to-one intercommunication.

Through above-mentioned technical scheme, this disclosure provides a drill bit promptly, the setting is the drill point 1 of toper structure and all connects in the lateral wall of drill point 1 through the cutting part of a plurality of cutting edges 3 through the work end at the drill bit, can solve the problem that drilling position precision is low among the correlation technique. In specific work, when using the drill bit, for example, when using this drill bit to bore hole to the human bone, can accurately fix a position the position of waiting to bore hole fast through the most advanced of drill point 1, and construct the drill point for the toper structure, the in-process of drill point pre-drilling can make the axis of drill point 1 or drill bit treat the bone surface at drill point position perpendicular to all the time, and all connect in the lateral wall of drill point 1 because of the cutting part of a plurality of cutting edges 3, can directly switch to the cutting part and bore hole after 1 pre-drilling of drill point, be favorable to the smooth and easy nature of drilling with the assurance, and can make and still can guarantee the drilling direction unchangeable after switching to the drilling of cutting part. Therefore, the present disclosure can solve the problem of low precision of the drilling position in the related art, and can be quickly inserted into, for example, the surface of a human bone, not easily slip, and can improve the precision of fixed point drilling cuttings.

In order to enable further rapid insertion into the surface of, for example, a human bone, rapid pre-perforation of the drill tip 1 is achieved, and in some embodiments, as shown with reference to fig. 6, the taper angle a of the drill tip 1 may be acute.

After the drill tip 1 is positioned and pre-drilled, in order to facilitate the intervention of the cutting edge 3 and the expansion of the drilled hole, in some embodiments, as shown with reference to fig. 6, the cutting edge of the cutting edge 3 may be configured to be straight, and the included angle b between the cutting edge and the axis of the drill is greater than the cone half angle of the drill tip 1, where the cone half angle is referred to as a/2.

In some specific embodiments, as shown with reference to fig. 5, a plurality of cutting edges 3 are arranged evenly and at intervals along the circumference of the drill. Fig. 5 shows an embodiment in which the number of cutting edges 3 is three, in order to achieve better drill chip removal.

Considering that the drill bit in the related art may cause clogging due to debris during drilling, in some embodiments, as shown in fig. 2, 4 and 5, the cutting edge 3 has a first side 301 and a second side 302 in the cutting direction thereof, the first chip flute 4 is formed at the first side 301 of the cutting edge 3, and the chip discharge guide surface 6 is provided between the second side 302 of the cutting edge 3 and the spiral chip flute 5 adjacent thereto, for guiding a part of the debris after cutting into the corresponding spiral chip flute 5. In this way, the chip removal guide surface 6 is matched with the first chip removal groove 4, so that the cut residual chips can be quickly guided into the corresponding spiral chip removal groove 5 to be removed, and the blocking frequency caused by the residual chips can be obviously reduced. The cutting direction refers to a direction of precession of the drill when drilling through the drill.

The chip guide surface 6 may be constructed in any suitable manner, for example, as shown with reference to fig. 2 and 4, a spiral protrusion 7 is formed between adjacent two spiral chip grooves 5, and the chip guide surface 6 is formed on the spiral protrusion 7. In this way, the chip guide surface 6 can be machined out of the helical projection 7, for example by milling or in some other way. The chip guide surface may be configured in any suitable shape, for example, the chip guide surface 6 may be configured as a plane, an arc surface, or the like, and the disclosure is not particularly limited thereto.

In some embodiments, as shown with reference to fig. 2 and 4, the helical projection 7 has a margin 8 on the outer wall. The margin 8 is beneficial to enhancing the strength and drilling stability of the drill bit, polishing the hole wall and improving the roundness of the hole.

In some embodiments, the gripping end of the drill bit is provided with gripping formations for removable connection to a drill. The gripping structure may be configured in any suitable manner for the purpose of cooperating with an associated drill to drive rotation of the drill bit by the drill, and the disclosure is not limited thereto in any particular manner.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (7)

1. The utility model provides a drill bit, its characterized in that, the drill bit has relative work end and exposed core along its axis direction, the drill bit certainly the work end to the exposed core has set gradually drill point (1), cutting part, chip removal portion and drilling rod (2), drill point (1) structure be with the toper structure that the drill bit coaxial line set up, the cutting part includes the edge a plurality of cutting edges (3) of the circumference interval arrangement of drill bit, and is a plurality of the cutting part of cutting edge (3) all connect in the lateral wall of drill point (1), adjacent two first chip removal groove (4) have between cutting edge (3), chip removal portion is including setting up a plurality of spiral chip removal grooves (5) side by side and extending in the same direction, and is a plurality of spiral chip removal groove (5) and a plurality of first chip removal groove (4) one-to-one intercommunication.

2. Drill bit according to claim 1, characterized in that the cone angle of the drill tip (1) is acute.

3. Drill according to claim 1, characterized in that the edge of the cutting edge (3) is configured as a straight line and that the angle between the edge and the axis of the drill is larger than the conical half-angle of the drill tip (1).

4. Drill according to claim 1, characterized in that a plurality of cutting edges (3) are arranged evenly and at intervals in the circumferential direction of the drill.

5. Drill bit according to any of claims 1-4, characterized in that the cutting edge (3) has a first side (301) and a second side (302) in its cutting direction, the first chip flute (4) being formed at the first side (301) of the cutting edge (3), and that the second side (302) of the cutting edge (3) has a chip discharge guide surface (6) between the spiral chip flute (5) adjacent thereto for guiding the partly cut chips into the corresponding spiral chip flute (5).

6. Drill bit according to claim 5, characterized in that a helical protrusion (7) is formed between two adjacent helical flutes (5), and that the chip evacuation guiding surface (6) is formed on the helical protrusion (7).

7. Drill bit according to claim 6, characterized in that the spiral-shaped protrusion (7) has a margin (8) on its outer wall.

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