CN213098139U

CN213098139U - Medical reciprocating grinding head and medical grinding cutter

Info

Publication number: CN213098139U
Application number: CN202020714024.4U
Authority: CN
Inventors: 郭毅军; 覃聪; 程圣茗
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-05-04
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a medical reciprocating grinding head and a medical grinding cutter, wherein the medical reciprocating grinding head comprises a cylindrical grinding part which is provided with a rotation axis and is provided with one or more first cutter teeth, one or more second cutter teeth, and a first blade groove and a second blade groove which are formed between the adjacent first cutter teeth and the adjacent second cutter teeth; the grinding part is also provided with one or more chip grooves which are arranged in a staggered manner and are communicated with the first blade grooves and the second blade grooves, and the first cutter teeth and the second cutter teeth are divided into a plurality of first cutter tooth units and a plurality of second cutter tooth units by the one or more chip grooves. The utility model discloses a medical reciprocal grinding head owing to be provided with the chip groove that just link up each other with first sword groove and second sword groove staggered arrangement, can improve the chip removal ability to improve cutting efficiency.

Description

Medical reciprocating grinding head and medical grinding cutter

Technical Field

The utility model relates to the technical field of medical equipment, especially relate to a medical reciprocal grinding head and medical grinding cutter.

Background

In some bone surgeries, it is sometimes necessary to grind bone tissue in a patient using a grinding tool, and the existing grinding tool generally comprises an outer tool tube and an inner tool tube rotatably arranged in the outer tool tube, wherein the front end of the inner tool tube is provided with a spherical or cylindrical grinding head on which tool teeth are arranged. In practical application, the rotating grinding head can generate winding and traction hazards on tissue structures needing important protection, such as peripheral blood vessels, nerves and the like. In order to improve grinding efficiency, a first cutter tooth for cutting when the grinding head rotates in a first direction and a second cutter tooth for cutting when the grinding head rotates in an opposite direction to the first direction are provided on the grinding head of the reciprocating grinding tool. In the practical use process, the problem that the grinding head of the reciprocating grinding tool is unsmooth in cutting arrangement is found, and the cutting efficiency is influenced.

Disclosure of Invention

To the above-mentioned prior art current situation, the utility model aims to solve the technical problem that a medical reciprocal grinding head that the chip removal is efficient is provided. The utility model aims to solve another technical problem and provide a medical grinding cutter that the chip removal is efficient and can drill.

In order to solve the technical problem, the utility model provides a medical reciprocating grinding head, including columniform grinding portion, this grinding portion has the rotation axis, is provided with on this grinding portion: one or more first cutter teeth distributed on the circumference of the grinding portion for cutting when the grinding head is rotated in a first direction about the axis of rotation; one or more second cutter teeth distributed on the circumference of the grinding portion for cutting when the grinding head rotates around the rotation axis in a direction opposite to the first direction, wherein all the second cutter teeth and all the first cutter teeth are arranged on the circumference of the grinding portion at intervals; the first blade groove and the second blade groove are sequentially formed between the adjacent first blade tooth and the second blade tooth at intervals; the grinding part is also provided with one or more chip removal grooves which are arranged in a staggered manner with the first blade grooves and the second blade grooves and are communicated with each other, and the first cutter teeth and the second cutter teeth are divided into a plurality of first cutter tooth units and a plurality of second cutter tooth units by the one or more chip removal grooves.

The utility model discloses a medical reciprocal grinding head owing to be provided with the chip groove that just link up each other with first sword groove and second sword groove staggered arrangement, can improve the chip removal ability to improve cutting efficiency.

Preferably, the first tooth has a first rake face, a first flank face and a first edge formed by the intersection of the first rake face and the first flank face, the second tooth has a second rake face, a second flank face and a second edge formed by the intersection of the second rake face and the second flank face, the first blade groove is formed between the first rake face of one of the first teeth and the second rake face of one of the second teeth adjacent to the first tooth, and the second blade groove is formed between the first flank face of the first tooth and the second flank face of the other of the second teeth adjacent to the first tooth.

Preferably, the first cutter tooth and the second cutter tooth extend in a first helical direction, and the flute extends in a second helical direction, the first helical direction and the second helical direction being opposite to each other.

Preferably, the surface of the first blade groove is smoothly transited and connected with the surface of the chip groove.

Preferably, the cross-sectional shapes of the first blade groove and the chip discharge groove are circular arc shapes.

Preferably, the first flank face and the second flank face have a linear cross-sectional shape.

Preferably, the first flank surface of the first tooth intersects the second flank surface of another second tooth adjacent to the first tooth at an obtuse angle.

Preferably, the first cutter tooth and the second cutter tooth are linear extending in a direction parallel to the rotation axis, and the chip discharge groove is spiral extending in a spiral direction.

Preferably, a hemispherical spherical portion is provided at a front end of the grinding portion, and two or more third cutter teeth arranged in a circumferential direction around the rotation axis and configured to cut when the grinding head rotates in the first direction around the rotation axis, and a third blade groove formed between two adjacent third cutter teeth are provided on the spherical portion.

The utility model provides a pair of medical grinding cutter, be in including outer sword pipe and setting interior sword pipe in the outer sword pipe, the front end of interior sword pipe is provided with medical reciprocal grinding head.

The advantageous effects of the additional features of the present invention will be explained in the detailed description of the preferred embodiments of the present description.

Drawings

Fig. 1 is an isometric view of a medical reciprocating grinding head in a first embodiment of the present invention;

FIG. 2 is an isometric view of the grinding portion of the medical reciprocating grinding head shown in FIG. 1;

FIG. 3 is a right side view of the grinding portion of the medical reciprocating grinding head shown in FIG. 1;

fig. 4 is an isometric view of a medical milling tool having the medical reciprocating milling head of fig. 1.

Description of reference numerals: 10. grinding the head; 11. a grinding section; 111. a first cutter tooth; 112. a second cutter tooth; 121. a first cutting edge; 122. a second cutting edge; 123. a first blade groove; 124. a first rake surface; 125. a first relief surface; 126. a second rake surface; 127. a second relief surface; 128. a second blade groove; 129. a chip groove; 13. a handle; 131. a connecting portion; 20. an outer knife pipe.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

As shown in fig. 1 to 3, a medical reciprocating grinding head 10 according to a first embodiment of the present invention includes a cylindrical grinding portion 11, the grinding portion 11 has a rotation axis a, a rear end of the grinding portion 11 is connected to a front end of a handle portion 13, a rear end of the handle portion 13 is provided with a connecting portion 131, and the connecting portion 131 is connected to an inner cutter tube (not shown in the drawings). One or more first cutter teeth 111 distributed on the circumference of the grinding portion 11 for cutting when the grinding head 10 rotates in a first direction (the first direction in the present embodiment is a clockwise direction in fig. 3, and may also be a counterclockwise direction) about the rotation axis a, one or more second cutter teeth 112 distributed on the circumference of the grinding portion 11 at intervals one by one from the first cutter teeth 111 for cutting when the grinding head 10 rotates in a direction opposite to the first direction (i.e., a counterclockwise direction in fig. 3), and a first blade groove 123 and a second blade groove 128 formed between the adjacent first cutter teeth 111 and second cutter teeth 112 are provided on the grinding portion 11.

The grinding part 11 is further provided with one or more chip grooves 129, the one or more chip grooves 129 are arranged in a staggered manner with the first blade grooves 123 and the second blade grooves 128 and penetrate through each other, and the first cutter teeth 111 and the second cutter teeth 112 are divided into a plurality of first cutter teeth 111 units and a plurality of second cutter teeth 112 units by the one or more chip grooves 129.

The utility model discloses a medical head 10 that grinds reciprocally, owing to be provided with first sword groove 123 and second sword groove 128 staggered arrangement and the chip groove 129 that link up each other, can improve the chip removal ability to improve cutting efficiency.

As shown in fig. 2 and 3, the first tooth 111 has a first rake surface 124, a first flank surface 125 and a first edge 121 formed by the intersection of the first rake surface 124 and the first flank surface 125, the second tooth 112 has a second rake surface 126, a second flank surface 127 and a second edge 122 formed by the intersection of the second rake surface 126 and the second flank surface 127, a first blade groove 123 is formed between the first rake surface 124 of one first tooth 111 and the second rake surface 126 of one second tooth 112 adjacent to the first tooth 111, and a second blade groove 128 is formed between the first flank surface 125 of the first tooth 111 and the second flank surface 127 of another second tooth 112 adjacent to the first tooth 111.

Preferably, the first cutter tooth 111 and the second cutter tooth 112 extend in a first helical direction (the first helical direction in the present embodiment is a right helix, and the first helical direction may also be a left helix), and the flutes 129 extend in a second helical direction (the second helical direction in the present embodiment is a left helix, and if the first helical direction is a left helix, the second helical direction is a right helix), the first helical direction and the second helical direction being opposite to each other. During operation, the first and second

spiral cutting teeth

111 and 112 have good stability when contacting with tissues, small vibration and small trauma to human body.

Preferably, the surface of the first blade groove 123 and the surface of the chip discharge groove 129 are smoothly transited to reduce the chip discharge resistance, and further improve the cutting efficiency. It is further preferable that the cross-sectional shapes of the first blade groove 123 and the chip groove 129 are semicircular to further reduce chip discharge resistance and improve cutting efficiency.

Preferably, the first flank surface 125 and the second flank surface 127 have a linear cross-sectional shape. It is further preferred that the first flank 125 of a first tooth 111 and the second flank 127 of another second tooth 112 adjacent to the first tooth 111 intersect at an obtuse angle α, so that the second blade groove 128 is more gradual and tissue adhesion during surgery is reduced.

Alternatively, the first blade tooth and the second blade tooth are linear extending in a direction parallel to the rotation axis, the first blade groove 123 and the second blade groove 128 are linear extending in a direction parallel to the rotation axis, and the chip discharge groove 129 is a spiral extending in a spiral direction.

In another embodiment of the present invention, the front end of the grinding portion 11 is provided with a hemispherical spherical portion (not shown), and two or more third teeth (not shown) arranged in the circumferential direction around the rotation axis and formed between two adjacent third teeth for cutting when the grinding head 10 rotates in the first direction around the rotation axis are provided on the spherical portion. Because the spherical part is arranged at the front end of the grinding part 11, and the third cutter tooth is arranged on the spherical part, the grinding head 10 can be used for a reciprocating type grinding operation handle to realize grinding in two directions, and can be matched with the grinding operation handle rotating in one direction, so that the functions of one-way grinding and drilling are realized, and the application range of the grinding head 10 is enlarged.

In another embodiment of the present invention, there is provided a medical grinding tool having the first or second embodiment, as shown in fig. 4, the medical grinding tool includes an outer cutter tube 20, an inner cutter tube (not shown in the figure) disposed in the outer cutter tube 20 and rotatable around a rotation axis in a first direction and a direction opposite to the first direction, and a medical reciprocating grinding head 10 connected to a front end of the inner cutter tube, wherein a connecting portion 131 of the grinding head 10 is inserted into a front end of the inner cutter tube and fixed thereto by welding.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A medical reciprocating abrading head comprising a cylindrical abrading portion having an axis of rotation, the abrading portion having disposed thereon:

one or more first cutter teeth distributed on the circumference of the grinding portion for cutting when the grinding head is rotated in a first direction about the axis of rotation;

one or more second cutter teeth distributed on the circumference of the grinding portion for cutting when the grinding head rotates around the rotation axis in a direction opposite to the first direction, wherein all the second cutter teeth and all the first cutter teeth are arranged on the circumference of the grinding portion at intervals; and

the first blade groove and the second blade groove are sequentially formed between the adjacent first blade tooth and the second blade tooth at intervals;

the cutting tool is characterized in that one or more chip removal grooves are further formed in the grinding portion, the one or more chip removal grooves are arranged in a staggered mode with the first cutting edge grooves and the second cutting edge grooves and are communicated with each other, and the first cutter teeth and the second cutter teeth are divided into a plurality of first cutter tooth units and a plurality of second cutter tooth units through the one or more chip removal grooves.

2. The medical reciprocating grinding head of claim 1 wherein the first tooth has a first rake face, a first relief face and a first edge formed by the intersection of the first rake face with the first relief face, the second tooth has a second rake face, a second relief face and a second edge formed by the intersection of the second rake face with the second relief face, the first flute is formed between the first rake face of one of the first teeth and the second rake face of one of the second teeth adjacent to that first tooth, and the second flute is formed between the first relief face of that first tooth and the second relief face of the other of the second teeth adjacent to that first tooth.

3. The medical reciprocating abrading head according to claim 2, wherein the first cutter teeth and the second cutter teeth extend in a first helical direction and the flutes extend in a second helical direction, the first helical direction and the second helical direction being opposite to one another.

4. The medical reciprocating abrading head as defined in claim 2, wherein the surface of said flute is in smooth transition with the surface of said first flute.

5. The medical reciprocating milling head as set forth in claim 4 wherein the chip flute and the first blade flute are each arc-shaped in cross-sectional shape.

6. The medical reciprocating abrading head of claim 2, wherein the first and second relief surfaces are linear in cross-sectional shape.

7. The medical reciprocating grinding head of claim 6 wherein the first flank of the first tooth intersects the second flank of another second tooth adjacent the first tooth at an obtuse angle.

8. The medical reciprocating abrading head according to claim 2, wherein the first blade teeth and the second blade teeth are linear extending in a direction parallel to the rotational axis, and the flutes are helical extending in a helical direction.

9. The medical reciprocating grinding head as claimed in any one of claims 1 to 8, wherein the front end of the grinding part is provided with a hemispherical spherical part on which two or more third teeth arranged in a circumferential direction centering on the rotation axis and a third blade groove formed between adjacent two of the third teeth are provided for cutting when the grinding head is rotated in the first direction about the rotation axis.

10. A medical grinding tool, comprising an outer tool tube and an inner tool tube arranged in the outer tool tube, characterized in that the front end of the inner tool tube is provided with a medical reciprocating grinding head comprising any one of claims 1 to 9.