CN209826866U

CN209826866U - Wear-resistant bone drill

Info

Publication number: CN209826866U
Application number: CN201822005326.XU
Authority: CN
Inventors: 董文兴
Original assignee: Beijing Tianxing Bomaidi Medical Devices Co Ltd
Current assignee: Beijing Tianxing Medical Co ltd
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2019-12-24
Anticipated expiration: 2028-11-29

Abstract

The utility model relates to a wear-resisting bone drill, it includes the drill point, the surface epirelief of drill point is equipped with two or more dentate lugs, the lug is made by diamond dust. The event the utility model discloses a surface epirelief at the drill point is equipped with a plurality of dentate lugs for the bone bores and becomes to have the bellied gear wheel of cusp and bores, thereby has increased the area of contact and the frictional force of bone drill and patient's skeleton, makes the drilling rate of bone drill improve, and drilling efficiency improves greatly, subtracts the operating time of having lacked, has shortened the painful time of patient. Meanwhile, due to the arrangement of the toothed convex blocks, the bone drill is not easy to slip in the drilling process, and the drilling accuracy of the bone drill is guaranteed. In addition, the lug is made of carborundum, so that the strength and the hardness of the lug are improved, the abrasion speed of the lug and the bone drill in the drilling process is reduced, the abrasion resistance of the bone drill is enhanced, and the service life of the bone drill is prolonged.

Description

Wear-resistant bone drill

Technical Field

The utility model relates to the field of medical equipment, particularly, relate to a wear-resisting bone drill.

Background

The bone drill, namely the orthopedic drill bit, is a tool used at high frequency in the process of orthopedic surgery, is used for drilling and tapping, and is particularly suitable for drilling holes in the long bones of limbs in orthopedic trauma surgery. For example: in the orthopedic surgery, a bone drill is often required to drill a hole in advance and then put a screw for fixation, or the hole is drilled to manufacture microfractures for joint fusion.

However, the prior art bone drills have the following disadvantages: the drill bit surface is level and smooth, when drilling into the skeleton, although the drill bit rotates at a high speed, the drill bit is difficult to generate larger friction force to the skeleton around the drill bit, so that the drilling speed is slow, the drilling efficiency is influenced, the operation time is longer, the painful time of a patient can be prolonged, the drill bit is easy to slip, and the accuracy of drilling of the bone drill is influenced. In addition, the bone drill in the prior art is mainly made of stainless steel and alloy materials, is easy to wear and has short service life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wear-resisting bone drill to the smooth technical problem who causes very easily wearing and tearing and skid easily of surface among the solution prior art.

The above technical problem of the present invention can be solved by the following technical solutions: the wear-resistant bone drill comprises a drill tip, wherein two or more tooth-shaped convex blocks are convexly arranged on the outer surface of the drill tip, and the convex blocks are made of carborundum.

The utility model discloses an epirelief is equipped with a plurality of dentate lugs on the surface of drill point for the bone bores and becomes to have the bellied gear wheel of cusp and bores, thereby has increased the area of contact and the frictional force of bone drill and patient's skeleton, makes the drilling rate of bone drill improve, and drilling efficiency improves greatly, subtracts the operating time of having lacked, has shortened the painful time of patient. Meanwhile, due to the arrangement of the toothed convex blocks, the bone drill is not easy to slip in the drilling process, and the drilling accuracy of the bone drill is guaranteed. In addition, the lug is made of carborundum, so that the strength and the hardness of the lug are improved, the abrasion speed of the lug and the bone drill in the drilling process is reduced, the abrasion resistance of the bone drill is enhanced, and the service life of the bone drill is prolonged.

It should be noted that the drill tip of the present invention is the part of the bone drill that directly contacts the patient during the treatment process. The utility model discloses a wear-resisting bone drill can comprise drill point, bore body and drilling rod. The drill tip may be cylindrical, truncated cone, or conical. A handle type shell can be arranged on the drill rod, and a driving motor for driving the drill body to rotate can be arranged in the handle type shell or not. Namely, the driving mode of the wear-resistant bone drill can be manual or electric. The drill body may or may not be provided with a threaded groove.

Preferably, the drill tip is in a circular truncated cone shape, and the bumps are uniformly distributed on the side wall of the drill tip.

The drill point is in a round table shape, so that the bone drill is convenient to drill holes, and the drilling efficiency is high. The convex blocks are uniformly distributed on the side wall of the drill tip, so that the convex blocks can be directly contacted with the hole wall to be drilled when the bone drill drills holes, the contact area and the friction force between the bone drill and the bone of a patient are increased, and the drilling efficiency is greatly improved.

The projections are uniformly distributed on the side wall of the drill tip, namely, the projections are distributed in a circumferential array around the axis of the drill tip, wherein the axis of the drill tip is the rotation axis of the bone drill, so that the forces and the abrasion of the projections in the drilling process of the bone drill are basically the same, and the long contact time between each individual projection and the bone of a patient is avoided, thereby avoiding the local overheating of the patient and the generation of uncomfortable feeling.

Preferably, a groove is formed in the side wall of the drill tip and located in the area between the adjacent bumps, and the cross section of the groove is in the shape of a concave arc.

The arrangement of the groove can reduce the contact area between the side wall of the bone drill and the bone of a patient, thereby reducing the temperature of the cutting surface, relieving the pain of the patient caused by the bone drill, facilitating chip removal and promoting the drilling efficiency. The cross section of the groove is in a concave arc shape, namely the groove is provided with a concave arc curved surface, so that the volume of the groove for accommodating bone fragments is increased, the friction force between the bone fragments and the groove is reduced, and the heat generated by mutual friction between the bone fragments and the groove is reduced. When the groove is used to remove bone chips broken by the bone drill during drilling, the bone chips are more easily discharged from the concave arc-shaped curved surface, i.e., the groove.

Preferably, the projection is in a shape of a frustum of a pyramid.

The lug is the terrace with edge shape, then can utilize the edge of terrace with edge to set up many cutting edges on the lug to can disperse the cutting resistance, improve and bore efficiency, can also reduce the mouth that collapses at drilling edge, alleviate patient's misery.

It should be noted that the specific value of the bump height may depend on the clinical site of application and the bone condition of the patient, and should not be too small or too large.

Preferably, the top of the drill tip is provided with a reamer bit which is coaxially arranged with the drill tip, and the reamer bit is provided with a spiral groove.

The arrangement of the reaming drill bit can increase the working surface of the bone drill, and the average abrasion of all parts of the bone drill is reduced, so that the service life of the bone drill is prolonged. The contact area between the side wall of the reaming bit and the bone of a patient can be reduced due to the arrangement of the spiral groove, so that the temperature of the cutting surface is reduced, the pain of the patient is relieved, chip removal is facilitated, and the drilling efficiency is promoted.

It should be noted that the reamer head and the drill tip may be integrally formed or may be fastened together. Wherein, when the two are in fastening connection, the connection mode can be in a detachable mode or a non-detachable mode, and the connection mode comprises but is not limited to threaded connection, snap connection, key slot connection and insertion connection.

Preferably, the outer diameter of the reamer bit is smaller than the maximum outer diameter of the drill tip.

The outer diameter of the reaming drill bit is smaller than the maximum outer diameter of the drill tip, so that in practical use, after the reaming drill bit drills, the drill tip is used for drilling, the reaming effect can be achieved, secondary drilling is not needed, the pain of a patient can be relieved, and meanwhile, the operation efficiency is improved.

Preferably, the axial length of the reamer bit is greater than the height of the projection and less than the axial length of the drill tip.

If the axial length of the reaming bit is too long, the reaming bit is too far away from the rotation center of the bone drill, so that the problem of breakage or drill jamming is easy to occur; the axial length of the reaming bit is too short, so that the reaming bit is difficult to machine and has a low effect. Therefore, the axial length of the expanding drill bit is larger than the height of the bump and smaller than the axial length of the drill tip, which is a more suitable range.

It is noted that the axial length is the length in the axial direction, for example, when the drill body is a long cylindrical shape, the axial length of the drill body is the length in the direction of the height of the cylinder, i.e., the height of the drill body.

Preferably, the top of the reaming bit is provided with a center drill which is coaxially arranged with the reaming bit, the top of the center drill is an outwardly convex curved surface, and the top of the center drill is uniformly provided with abrasive particles.

The central drill is arranged, so that the bone drill can not deviate from a bone path to be drilled and ground, the drilling position of the bone drill is accurate, and the centering and navigation effects are achieved; when the bone drill bit, the drill body or the reamer bit is used for drilling holes in the bone surgery, the bone drill bit can be abutted against the bone or the texture mucous membrane of a patient to play a role in pushing and blocking, and the bone drill is prevented from accidentally injuring the bone or the texture mucous membrane. The top of the center drill is an outward convex curved surface, and the arrangement of the abrasive particles can reduce the contact area with bones or texture mucous membranes.

It should be noted that the reamer head and the central drill may be integrally formed or may be fastened together. Wherein, when the two are in fastening connection, the connection mode can be in a detachable mode or a non-detachable mode, and the connection mode comprises but is not limited to threaded connection, snap connection, key slot connection and insertion connection.

Preferably, the abrasive particles are made of corundum.

The abrasive particles are made of carborundum, so that the strength and the hardness of the abrasive particles are improved, the abrasion speed of the abrasive particles and the central drill in the drilling process is reduced, the abrasion resistance of the bone drill is enhanced, and the service life of the bone drill is prolonged.

Preferably, the outer diameter of the central drill is smaller than the outer diameter of the reamer head, and the axial length of the central drill is greater than or equal to the height of the bump and smaller than the axial length of the reamer head.

The outer diameter of the central drill is smaller than that of the expanding drill bit, so that the central drill can be used for processing a positioning central hole before drilling of the bone drill and can also be used for fine adjustment and micro expansion of the bore diameter of the drill hole. If the axial length of the central drill is too long, the central drill is too far away from the rotating center of the bone drill, so that the problem of breakage or drill jamming is easily caused; the axial length of the central drill is too short, so that the central drill is difficult to process and has a low effect. Therefore, the axial length of the central drill is larger than the height of the bump and smaller than the axial length of the expanding bit, which is a more suitable range.

Based on this, compared with the prior art, the utility model, have the advantages of wearability height, long service life and difficult skidding.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a front view of a first embodiment of the present invention;

fig. 2 is a front view of a second embodiment of the present invention;

fig. 3 is a cross-sectional view of a second embodiment of the present invention;

fig. 4 is a perspective view of a third embodiment of the present invention.

In the figure: 1-a drill rod; 2, drilling a body; 3, drilling a tip; 31-a bump; 32-grooves; 4-expanding a hole drill bit; 41-a groove; 42-center drilling; 421-abrasive grains.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Embodiment one of the wear-resistant bone drill:

referring to fig. 1, the wear-resistant bone drill comprises a drill tip 3, wherein two or more tooth-shaped convex blocks 31 are convexly arranged on the outer surface of the drill tip 3, and the convex blocks 31 are made of carborundum.

It should be noted that the drill tip of the present invention is the part of the bone drill that directly contacts the patient during the treatment process. The utility model discloses a wear-resisting bone drill can comprise drill point 3, bores body 2 and drilling rod 1. The drill tip 3 may be cylindrical, truncated cone or conical. A handle-type shell can be arranged on the drill rod 1, and a driving motor for driving the drill body to rotate can be arranged in the handle-type shell or not. Namely, the driving mode of the wear-resistant bone drill can be manual or electric. The drill body 2 may or may not be provided with a threaded groove.

Referring to fig. 1, the drill tip 3 is in a truncated cone shape, and the protrusions 31 are uniformly distributed on the side wall of the drill tip 3.

In fig. 1, a groove 32 is formed in the side wall of the drill tip 3 at the area between the adjacent protrusions 31, and the cross section of the groove 32 is a concave arc.

As shown in fig. 1, the bump 31 has a truncated pyramid shape.

Example two of a wear resistant bone drill:

referring to fig. 2, 3 and 4, in this embodiment, including the structure of the first embodiment of the wear-resistant bone drill, the top of the drill tip 3 is provided with a reamer bit 4 coaxially arranged with the drill tip, and the reamer bit 4 is provided with a spiral groove 41.

Referring to fig. 2 and 3, the outer diameter of the reamer bit 4 is smaller than the maximum outer diameter of the drill tip 3.

The axial length of the reamer bit 4, see fig. 2, 3, is greater than the height of the projection 31 and less than the axial length of the drill tip 3.

Referring to fig. 2 and 3, the top of the reamer head 4 is provided with a central drill 42 coaxially arranged therewith, the top of the central drill 42 is a curved surface protruding outwards, and the top of the central drill 42 is uniformly provided with abrasive particles 421.

Referring to fig. 3, the abrasive particles 421 are made of corundum.

Referring to fig. 2 and 3, the outer diameter of the central drill 42 is smaller than the outer diameter of the reamer head 4, and the axial length of the central drill 42 is greater than or equal to the height of the protrusion 31 and smaller than the axial length of the reamer head 4.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wear-resistant bone drill, includes drill point, its characterized in that: two or more tooth-shaped convex blocks are convexly arranged on the outer surface of the drill tip, and the convex blocks are made of carborundum.

2. The wear resistant bone drill of claim 1, wherein: the drill point is in a round table shape, and the convex blocks are uniformly distributed on the side wall of the drill point.

3. The wear resistant bone drill of claim 1 or 2, wherein: and a groove is arranged on the side wall of the drill point and in the area between the adjacent convex blocks, and the cross section of the groove is in a concave arc shape.

4. The wear resistant bone drill of claim 3, wherein: the lug is frustum pyramid-shaped.

5. The wear resistant bone drill of claim 1, wherein: the top of the drill point is provided with a hole expanding drill bit which is coaxially arranged with the drill point, and the hole expanding drill bit is provided with a spiral groove.

6. The wear resistant bone drill of claim 5, wherein: the outer diameter of the reamer bit is smaller than the maximum outer diameter of the drill tip.

7. The wear resistant bone drill of claim 6, wherein: the axial length of the reaming bit is greater than the height of the lug and less than the axial length of the drill tip.

8. The wear resistant bone drill according to any one of claims 5 to 7, characterized in that: the top of the reaming bit is provided with a central drill which is coaxial with the reaming bit, the top of the central drill is an outward convex curved surface, and the top of the central drill is uniformly provided with abrasive particles.

9. The wear resistant bone drill of claim 8, wherein: the abrasive particles are made of carborundum.

10. The wear resistant bone drill of claim 9, wherein: the outer diameter of the central drill is smaller than the outer diameter of the expanding bit, and the axial length of the central drill is larger than or equal to the height of the bump and smaller than the axial length of the expanding bit.