CN213489112U

CN213489112U - Medical three-edge milling cutter

Info

Publication number: CN213489112U
Application number: CN202021637890.4U
Authority: CN
Inventors: 马二鹏; 田耀兴; 王国栋
Original assignee: Shandong Xinhua Health Industry Co ltd
Current assignee: Shandong Xinhua Health Industry Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-06-22
Anticipated expiration: 2030-08-07

Abstract

The utility model belongs to the milling cutter field of using in the neurosurgery craniotomy, a medical three-edged milling cutter is related to, including the anterior sword end of an organic whole connection and the handle end at rear portion, the sword end is equipped with three spiral cutting edge to sword end is equipped with 1-3 and arranges the chip groove in line, and the central line that arranges the chip groove is parallel with sword end central line. The utility model discloses hold bits and chip removal ability good, can make the bone bits in time effectively discharge, avoid piling up the unusual generating heat that causes because of the bone bits, improve cutter sustainable operation duration.

Description

Medical three-edge milling cutter

Technical Field

The utility model relates to a medical three-blade milling cutter, which belongs to the milling cutter field used in the craniotomy of neurosurgery.

Background

In craniotomy, a craniotomy with a self-stop craniotome and a milling cutter is generally adopted, that is, one or more holes are drilled in the skull by the self-stop craniotome, and then the holes are milled and connected by the milling cutter to create a round bone called a bone flap and remove the bone flap, so as to perform operations such as removing a focus. The milling cutter for milling requires sharp cutting edge, is not easy to break, and is stable and reliable. There are two kinds of structures of straight sword and ordinary spiral sword among the prior art, and the cutting bits splash and the problem that easily collapses absolutely when straight sword exists and mills, and the spiral sword that uses at present has the cutting efficiency problem lower relatively and the chip removal is not good, and the use bone bits are piled up and can be aroused abnormal heat generation, influence the sustainable duration of cutter.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, and the medical three-edge milling cutter is good in chip accommodating and removing capacity, so that bone chips can be effectively discharged in time, abnormal heating caused by accumulation of the bone chips is avoided, and the sustainable operation time of the cutter is improved.

Medical three-edge milling cutter, including the anterior sword end of an organic whole connection and the handle end at rear portion, the sword end is equipped with three spiral cutting edge to sword end is equipped with 1-3 and arranges the chip groove in line, and the central line of arranging the chip groove in line is parallel with sword end central line.

The cutter edge end is provided with three spiral cutting edges, and the periphery of the cutter edge end is provided with 1-3 straight chip grooves, so that chips can be discharged more smoothly, and bone chips are not easy to accumulate, thereby effectively avoiding abnormal heating of the cutter edge end, ensuring the time of the cutter for continuous normal operation, and having simple processing and manufacturing and convenient operation; and the spiral cutting edge has high strength and is not easy to break. The blade end and the handle end are coaxially arranged.

Preferably, the spiral direction of the three spiral cutting edges is left-handed, so that the splashing of cutting chips is effectively reduced.

Preferably, the helix angle α of the three helical cutting edges is 15 ° to 50 °.

Preferably, the diameter of the blade end is gradually increased from the front end to the rear end, the diameter of the blade tip is small, the diameter of the blade tail is large, and the whole blade end is conical, so that the front end of the cutter is thinner on the basis of ensuring the strength of the cutter, and the width of a milled skull gap is reduced as much as possible.

Preferably, the middle part of the handle end is provided with an annular groove, and the rear end part is provided with a U-shaped groove. When the cutter is installed and used with other mechanisms, the annular groove can play a role in axial limiting; the U-shaped groove can play a role in radial limiting.

Compared with the prior art, the utility model beneficial effect who has is:

the utility model has the advantages of reasonable structural design, good chip holding and removing capacity, timely and effective discharge of bone chips, avoidance of abnormal heating caused by bone chip accumulation, improvement of the sustainable operation time of the cutter, simple processing and manufacturing and convenient operation; the spiral cutting edge has high strength and is not easy to break; the spiral direction of the three spiral cutting edges is left-handed, so that the splashing of cutting chips is effectively reduced; the blade end is conical, so that the front end of the cutter can be thinner on the basis of ensuring the strength of the cutter, and the width of a milled skull slit is reduced as much as possible.

Drawings

Fig. 1 is a schematic structural view (front view) of a medical three-edge milling cutter;

fig. 2 is a schematic structural view (right side view) of the medical three-edge milling cutter;

FIG. 3 is a sectional enlarged view taken along line A-A in FIG. 1;

FIG. 4 is a sectional enlarged view taken along line B-B in FIG. 1;

FIG. 5 is a sectional enlarged view taken along line C-C in FIG. 1;

fig. 6 and enlarged sectional view D-D in fig. 1.

In the figure: 1. a U-shaped groove; 2. a handle end; 3. an annular groove; 4. a helical cutting edge; 5. a blade end; 6. and (4) directly discharging the chip grooves.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1-6, the medical three-edge milling cutter of the present invention comprises a front blade end 5 and a rear handle end 2, which are integrally connected, wherein the blade end 5 is provided with three spiral cutting blades 4, and the blade end 5 is provided with 2 straight flutes 6, and the central lines of the straight flutes 6 are parallel to the central line of the blade end 5.

In this embodiment:

the spiral direction of the three spiral cutting edges 4 is left-handed, so that the splashing of cutting chips is effectively reduced; the helix angle alpha of the three helical cutting edges 4 is 26 degrees; the diameter of the blade end 5 from the front end to the rear end is gradually increased, the diameter of the blade tip is small, the diameter of the blade tail is large, the whole blade end 5 is conical, the front end of the cutter can be thinner on the basis of ensuring the strength of the cutter, and the width of a milled skull gap is reduced as much as possible; the middle part of the knife handle end 2 is provided with an annular groove 3, and the rear end part is provided with a U-shaped groove 1. When the cutter is installed and used with other mechanisms, the annular groove 3 can play a role in axial limiting; u type recess 1 can play radial spacing effect.

The cutter edge end 5 is provided with three

spiral cutting edges

4, 2 straight chip grooves 6 are machined in the periphery of the cutter edge end 5, the straight chip grooves 6 can discharge chips more smoothly, and bone chips are not easy to accumulate, so that abnormal heating of the cutter edge end 5 is effectively avoided, the time for the cutter to continuously and normally run is ensured, and the cutter is simple to machine and manufacture and convenient to operate; and the spiral cutting edge 4 has high strength and is not easy to break. The blade end 5 and the shank end 4 are arranged coaxially.

Claims

1. A medical three-edge milling cutter is characterized in that: the cutting tool comprises a front cutting edge end (5) and a rear cutting edge end (2) which are integrally connected, wherein the cutting edge end (5) is provided with three spiral cutting edges (4), the cutting edge end is provided with 1-3 straight chip grooves (6), and the center lines of the straight chip grooves (6) are parallel to the center line of the cutting edge end (5); the diameter of the blade end (5) is gradually increased from the front end to the rear end.

2. The medical three-edge milling cutter according to claim 1, wherein: the spiral direction of the three spiral cutting edges (4) is left-handed.

3. The medical three-edge milling cutter according to claim 1, wherein: the helix angle of the three helical cutting edges (4) is 10-50 degrees.

4. The medical three-edge milling cutter according to claim 1, wherein: the middle part of the knife handle end (2) is provided with an annular groove (3), and the rear end part is provided with a U-shaped groove (1).