Curved hole drilling tool

Abstract

The utility model discloses a curved hole drilling tool which comprises a curved external connecting sleeve, a cavity is formed in the external connecting sleeve, a driving piece is arranged at one end of the external connecting sleeve, a drill bit is arranged at the other end of the external connecting sleeve, a flexible connecting rod is arranged in the cavity, and the two ends of the flexible connecting rod are connected with the driving piece and the drill bit respectively. The technical problem that in the prior art, curved holes cannot be drilled in orthopedic surgery is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a curved hole drilling tool. Background Art

[0002] In modern orthopedic medicine, holes are often drilled in the bone structure of the human body to insert various fixings to anchor two damaged bone structures. Years of clinical experience have proved that this method is safe and effective. At the same time, a further requirement is that if the hole can be drilled into a curved hole on the basis of a straight hole, the anchoring effect will be better.

[0003] Orthopedic medical curved holes are a medical solution proposed in recent years. From the perspective of mechanical principles, it is definitely advanced and reasonable. However, it is well known that it is extremely difficult or even impossible to drill curved holes on flat or curved surfaces without wheels, because both the drill bit feed and the workpiece feed can only go in a straight line, resulting in the inability to drill curved holes.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies and provide a curved hole drilling tool to solve the technical problem that a curved hole cannot be drilled in orthopedic surgery in the related art.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] According to one aspect of the utility model, a curved hole drilling tool is provided, including a curved external sleeve, wherein the external sleeve has a cavity, a driving member is provided at one end of the external sleeve, and a drill bit is provided at the other end, a flexible connecting rod is provided in the cavity, and the two ends of the flexible connecting rod are respectively connected to the driving member and the drill bit.

[0008] Optionally, the flexible connecting rod includes a plurality of flexible bodies, and adjacent flexible bodies are hooked via a connecting piece.

[0009] Optionally, the coiled body is a material that can be used to prepare a coiled structure, and any material that has a certain strength can be used, such as steel wire, engineering plastics, etc.

[0010] Optionally, the drill bit is provided with a chip removal groove.

[0011] Optionally, the chip removal groove is located on the circumferential surface of the drill bit at a position of maximum diameter.

[0012] Optionally, the maximum outer diameter of the drill bit is greater than the outer diameter of the outer sleeve.

[0013] Optionally, the maximum outer diameter of the drill bit is 0.2 mm greater than the outer diameter of the outer sleeve.

[0014] The curved hole drilling tool provided by the utility model is equipped with a drilling mold (male mold) according to the curved shape and size of the required curved hole (which can be regarded as a female mold). It includes a curved outer sleeve, and a flexible connecting rod (which only transmits torque) is connected in series through the cavity in the outer sleeve, so as to realize the curved surface drilling requirements of torque drilling and cutting and jacking feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of a curved hole drilling tool is provided for an embodiment of the utility model;

[0016] Figure 2 A schematic structural diagram of a flexible component of a curved hole drilling tool is provided for an embodiment of the utility model;

[0017] Figure 3 A left-side structural schematic diagram of a drill bit of a curved hole drilling tool is provided for an embodiment of the utility model;

[0018] Figure 4 for Figure 3 Sectional view in AA direction;

[0019] Figure 5 A right side structural schematic diagram of a drill bit of a curved hole drilling tool is provided for an embodiment of the utility model;

[0020] In the figure:

[0021] 1-external sleeve; 2-driving part; 3-drill bit; 4-flexible connecting rod; 5-flexible part; 6-connecting part; 7-chip groove. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] The utility model provides a curved hole drilling tool, combined with Figure 1-5 , including a curved external sleeve 1, wherein the external sleeve 1 has a cavity, a driving member 2 is provided at one end of the external sleeve 1, and a drill bit 3 is provided at the other end, a flexible connecting rod 4 is provided in the cavity, and the two ends of the flexible connecting rod 4 are respectively connected to the driving member 2 and the drill bit 3.

[0024] The external sleeve 1 is a curved cylinder, one end of which is a drill bit 3, and the other end is a connection end of a driving member 2. If a motor is used as a driving member, the connection end is a drill handle driven by the motor. The middle curved body of the external sleeve 1 is connected by sections, and the drill bit 3 and the driving member 2 are connected end to end through a plurality of winding members 5 in the curved body. The rotational motion and torque of the driving member 2 are transmitted to the drill bit 3 through the winding members 5. The drill bit 3 rotates to do work, and a hole can be drilled. The shavings drilled by the drilling flow along the outside of the drill body and overflow to the outside. Due to the limitation of the external sleeve 1, the travel route of the drill bit 3 is a curve, so the hole drilled is a curved hole corresponding to the external sleeve 1.

[0025] The specific shape and size of the external sleeve 1 are determined according to the shape and size of the curved hole to be opened. For example, the requirements put forward by orthopedic medicine now are that the hole diameter is 2mm to 7mm, the length is 100mm, and the angle between the vector at the entrance of the curved hole and the vector at the bottom of the hole is about 50 to 60 degrees.

[0026] The flexible connecting rod 4 includes a multi-section flexible body 5, and adjacent flexible bodies 5 are hooked by a connecting member 6. The flexible body 5 is a steel wire. As an example, the flexible body 5 is prepared by a special bending preparation tool, and finally connected to each other according to specific requirements (length, aperture), one end of which is welded to the inner end of the drill bit 3 by a laser welding machine, and the other end is inserted into the center hole of the driving member 2 and pressed with a screw. The flexible member 5 is a force transmission tool in this device. Due to the bending requirements of this device, the flexible force transmission components must also be bent, so they must perform complex three-dimensional movements during movement. At this time, when designing, safe movement without decoupling from each other needs to be the basic requirement.

[0027] The external sleeve 1 can also be formed by laser welding of the node ends on a mold to ensure its rigidity.

[0028] In some embodiments, the drill bit 3 is based on the center drill, but has a smaller size, a greatly compressed axial dimension, and retains the cutting edge.

[0029] As an example, a chip removal groove 7 is provided on the drill bit 3 to improve the chip removal effect. For example, the chip removal groove 7 is located on the circumference of the drill bit 3 at the maximum diameter position.

[0030] As an example, the maximum outer diameter of the drill bit 3 is greater than the outer diameter of the outer sleeve 1. For example, the maximum outer diameter of the drill bit 3 is 0.2 mm greater than the outer diameter of the outer sleeve 1 to ensure smooth chip removal.

[0031] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A curved hole drilling tool, characterized in that: It comprises a curved outer sleeve with a cavity inside. A driving member is arranged at one end of the outer sleeve and a drill bit is arranged at the other end. A flexible connecting rod is arranged in the cavity. The two ends of the flexible connecting rod are respectively connected with the driving member and the drill bit.

2. The curved hole drilling tool according to claim 1, characterized in that: The flexible connecting rod comprises a plurality of flexible bodies, and adjacent flexible bodies are hooked by connecting members.

3. The curved hole drilling tool according to claim 2, characterized in that: The coiled body is a material that can be used to prepare a coiled structure.

4. The curved hole drilling tool according to claim 1, characterized in that: The drill bit is provided with a chip removal groove.

5. The curved hole drilling tool according to claim 4, characterized in that: The chip removal groove is located on the circumferential surface of the drill bit at the position of the maximum diameter.

6. The curved hole drilling tool according to claim 5, characterized in that: The maximum outer diameter of the drill bit is greater than the outer diameter of the outer sleeve.

7. The curved hole drilling tool according to claim 1, characterized in that: The maximum outer diameter of the drill bit is 0.2 mm greater than the outer diameter of the outer sleeve.

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