CN115956977B - Distal femur condyle grinding device - Google Patents
Distal femur condyle grinding device Download PDFInfo
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- CN115956977B CN115956977B CN202310254876.8A CN202310254876A CN115956977B CN 115956977 B CN115956977 B CN 115956977B CN 202310254876 A CN202310254876 A CN 202310254876A CN 115956977 B CN115956977 B CN 115956977B
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Abstract
The invention provides a distal femur condyle grinding device, which comprises: the shell is provided with a first accommodating cavity, a second accommodating cavity and a clamping part, wherein the first accommodating cavity is communicated with the second accommodating cavity, and the shell where the second accommodating cavity is located and the clamping part form a clamping cavity; the first transmission group is provided with a first driving wheel and a first driven wheel with rotation axes mutually perpendicular, and is inserted with a transmission shaft and arranged in the first accommodating cavity; the second transmission group is provided with a second driving wheel and a second driven wheel with rotation axes parallel to each other, and is inserted with a transmission shaft which is arranged in the second accommodating cavity; the transmission shaft comprises an input shaft and an intermediate shaft, the rotation axes of which are mutually perpendicular, and an output shaft, the rotation axes of which are mutually parallel to the intermediate shaft, and is rotatably inserted into the shell; the center of the cylindrical milling cutter is provided with a through hole for inserting an output shaft, and the cylindrical milling cutter is rotatably arranged in the clamping cavity. By applying the technical scheme of the invention, the problems that the unicondylar osteotomy surface is uneven or the bicondylar osteotomy surface is not in the same plane in the related technology can be solved.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a distal femur condyle grinding device.
Background
Total knee arthroplasty begins at the end of the 70 s of the last century, and the most common indications are osteoarthritis, rheumatoid arthritis, at the end stage of the knee joint, because knee joint pain is ill-suited, limited in activity, conservative treatment has failed to address the problem, improve the quality of life of the patient, and total knee arthroplasty can alleviate knee joint pain, correct deformity, improve function and improve the quality of life of the patient.
When the distal end of the femoral condyle is used for osteotomy, a medical pendulum saw is often used for removing bone tissues, but the structure of the saw blade is long and narrow, so that the saw plate is easy to swing at a high speed along with the pendulum chuck of the electric tool, thereby causing the resonance problem of the natural frequency and the driving frequency of the saw blade, being difficult to realize precise bone cutting, causing the problems that the unicondylar osteotomy surface is uneven or the bicondylar osteotomy surface is not in the same plane, and the like, influencing the installation of the femoral condyle prosthesis, and further influencing the operation quality.
Aiming at the problems, the invention provides the distal femur condyle grinding device, which changes the rotation direction of a power input shaft through a steering gear set, and is matched with a cylindrical milling cutter to grind the bicondylar bone section simultaneously, so that the aim that the bicondylar bone section is smooth and positioned in the same plane is fulfilled.
Disclosure of Invention
The invention provides a distal femur condyle grinding device, which comprises: the shell is provided with a first accommodating cavity, a second accommodating cavity and a clamping part, wherein the first accommodating cavity is communicated with the second accommodating cavity, and the shell where the second accommodating cavity is located and the clamping part form a clamping cavity; the first transmission group comprises a first driving wheel and a first driven wheel driven by the first driving wheel, and is rotatably arranged in the first accommodating cavity; the second transmission group comprises a second driving wheel and a second driven wheel driven by the second driving wheel, and is rotatably arranged in the second accommodating cavity; the transmission shaft comprises an input shaft and an intermediate shaft, the rotation axes of which are mutually perpendicular, and an output shaft, the rotation axes of which are mutually parallel to the intermediate shaft, and is rotatably inserted into the shell; the center of the cylindrical milling cutter is provided with a through hole for inserting an output shaft, and the cylindrical milling cutter is rotatably arranged in the clamping cavity.
Further, the first accommodating cavity is inserted with the input shaft, the second accommodating cavity is inserted with the output shaft, the first accommodating cavity and the second accommodating cavity are mutually communicated, and the intermediate shaft is jointly inserted.
Further, all joints of the shell and the transmission shaft are connected by adopting bearings.
Further, the centre of the clamping portion is collinear with the axis of the cylindrical milling cutter.
Further, the rotation axes of the first driving wheel and the first driven wheel are perpendicular to each other, and the first driving wheel drives the first driven wheel to transmit power from the input shaft to the intermediate shaft.
Further, the rotation axes of the second driving wheel and the second driven wheel are parallel to each other, and the second driving wheel drives the second driven wheel to transmit power from the intermediate shaft to the output shaft.
Further, the axis of the input shaft is located on a plane in which the central cross section of the cylindrical milling cutter is located.
Further, the input shaft and the intermediate shaft are both provided with locking mechanisms, and the locking mechanisms are abutted to a first transmission group which is spliced with the shaft where the locking mechanisms are located.
Further, the radius of the clamping part is smaller than that of the cylindrical milling cutter; the radius of the shell where the second driven wheel is located is smaller than or equal to the radius of the clamping part.
Further, any cross-sectional area of the cylindrical mill perpendicular to its axis is equal, and the sidewall of the cylindrical mill has a cutting edge.
By applying the technical scheme of the invention, the distal femur condyle grinding device comprises: the bone cutting device comprises a shell, a first transmission group, a second transmission group, a transmission shaft and a cylindrical milling cutter, wherein the transmission shaft is rotatably arranged on the shell in a penetrating manner when the distal end of a femoral condyle cuts bones, and is connected with external power, and the cylindrical milling cutter is driven by the first transmission group and the second transmission group to stably grind and cut bones at the distal end of the femoral condyle. Can solve the problems that the unicondylar osteotomy surface is uneven or the bicondylar osteotomy surface is not in the same plane in the related art.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 illustrates a perspective view of a distal femoral condyle grinding device provided in accordance with an embodiment of the present invention;
FIG. 2 illustrates an assembled cross-sectional view of a distal femoral condyle grinding device provided in accordance with an embodiment of the present invention;
FIG. 3 shows a perspective view of the housing of the distal femoral condyle grinding device of FIG. 1;
FIG. 4 shows a left side view of the housing of the distal femoral condyle grinding device of FIG. 1;
FIG. 5 shows a right side view of the housing of the distal femoral condyle grinding device of FIG. 1;
FIG. 6 shows a schematic view of the cylindrical milling cutter of the distal femoral condyle grinding apparatus of FIG. 1;
FIG. 7 shows a right side view of a cylindrical milling cutter of the distal femoral condyle grinding device of FIG. 1;
fig. 8 shows a schematic structural view of a locking mechanism of the distal femoral condyle grinding device of fig. 1.
Wherein the above figures include the following reference numerals:
10. a housing; 11. a first accommodation chamber; 12. A second accommodation chamber; 13. a clamping part; 14. a clamping cavity;
20. a first drive train; 21. a first drive wheel; 22. a first driven wheel;
30. a second transmission set; 31. a second driving wheel; 32. a second driven wheel;
40. a transmission shaft; 41. an input shaft; 42. an intermediate shaft; 43. an output shaft; 44. a locking mechanism;
50. a cylindrical milling cutter; 51. a through hole; 52. a blade;
r1, the radius of the shell where the second driven wheel is positioned; r2, radius of the clamping part; r3, radius of the cylindrical milling cutter.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 3, the present invention provides a distal femoral condyle grinding apparatus, comprising: a housing 10 having a first accommodating chamber 11, a second accommodating chamber 12 and a clamping portion 13, wherein the first accommodating chamber 11 and the second accommodating chamber 12 are communicated with each other, and the housing 10 where the second accommodating chamber 12 is located and the clamping portion 13 form a clamping chamber 14; the first transmission group 20 comprises a first driving wheel 21 and a first driven wheel 22 driven by the first driving wheel, and is rotatably arranged in the first accommodating cavity 11; a second transmission group 30 including a second driving wheel 31 and a second driven wheel 32 driven by the second driving wheel, and rotatably disposed in the second accommodating chamber 12; a transmission shaft 40 including an input shaft 41 and an intermediate shaft 42 having rotational axes perpendicular to each other, and an output shaft 43 having rotational axes parallel to the intermediate shaft 42 and rotatably inserted in the housing 10; a cylindrical milling cutter 50, having a through hole 51 at the center thereof, inserted in the output shaft 43, is rotatably provided in the holding chamber 14.
The first housing chamber 11 is inserted with the input shaft 41, the second housing chamber 12 is inserted with the output shaft 43, the first housing chamber 11 and the second housing chamber 12 are communicated with each other, and the intermediate shaft 42 is inserted together.
As shown in fig. 2, all the joints of the housing 10 and the transmission shaft 40 are connected by bearings, so as to reduce friction resistance and prolong the service life of the device.
In particular, the centre of the clamping portion 13 is collinear with the axis of the cylindrical milling cutter 50 to ensure a fixed axis rotational movement of the cylindrical milling cutter 50 within the clamping chamber 14.
As shown in fig. 2, the rotation axes of the first driving wheel 21 and the first driven wheel 22 are perpendicular to each other, the first driving wheel 21 drives the first driven wheel 22, and power is transmitted from the input shaft 41 to the intermediate shaft 42; the axes of rotation of the second driving wheel 31 and the second driven wheel 32 are parallel to each other, said second driving wheel 31 driving said second driven wheel 32, transmitting power from the intermediate shaft 42 to the output shaft 43.
In this embodiment, the first driving wheel 21 and the first driven wheel 22 are a pair of bevel gears meshed with each other, and in other embodiments, a worm gear with a vertical axis different from the plane may be used for transmission; the second driving wheel 31 and the second driven wheel 32 are a pair of cylindrical gears meshed with each other, and in other embodiments, the driving can be performed by a chain driving mode, a belt driving mode or the like.
In particular, the axis of the input shaft 41 is located on the plane of the central cross section of the cylindrical milling cutter 50, so as to ensure that when an external force is applied to move or compress the distal femoral condyle grinding device, the forces at each contact point of the cylindrical milling cutter 50 and the osteotomy surface are equal, and thus osteotomy errors caused by the structural design of the device itself are reduced.
The input shaft 41 and the intermediate shaft 42 are both provided with a locking mechanism 44, and the locking mechanism 44 is abutted against the first transmission group 20 inserted into the shaft where the locking mechanism is located, so as to counteract the axial force applied to the first transmission group 20, and ensure that the first transmission group 20 does not axially move when the first transmission group receives an external force.
As shown in fig. 8, in the present embodiment, the locking mechanism 44 is an annular structure having an opening, and is detachably provided on the first transmission group 20.
As shown in fig. 4, 5 and 7, the clamping portion radius R2 is smaller than the cylindrical milling cutter radius R3; the radius R1 of the shell where the second driven wheel is located is smaller than or equal to the radius R2 of the clamping part, so that the cutting edge of the cylindrical milling cutter 50 can contact the osteotomy surface and can be ground.
As shown in fig. 6 and 7, any cross-sectional area of the cylindrical milling cutter 50 perpendicular to its axis is equal to ensure flatness of the osteotomy surface; the side wall of the cylindrical mill 50 has cutting edges 52.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A distal femoral condyle grinding apparatus, comprising:
the shell (10) is provided with a first accommodating cavity (11), a second accommodating cavity (12) and a clamping part (13), the first accommodating cavity (11) is communicated with the second accommodating cavity (12), and the shell (10) where the second accommodating cavity (12) is positioned and the clamping part (13) form a clamping cavity (14);
the first transmission group (20) comprises a first driving wheel (21) and a first driven wheel (22) driven by the first driving wheel, and is rotatably arranged in the first accommodating cavity (11);
the second transmission group (30) comprises a second driving wheel (31) and a second driven wheel (32) driven by the second driving wheel, and is rotatably arranged in the second accommodating cavity (12);
a transmission shaft (40) including an input shaft (41) and an intermediate shaft (42) having rotational axes perpendicular to each other, and an output shaft (43) having rotational axes parallel to the intermediate shaft (42) and rotatably inserted in the housing (10); the axis of the input shaft (41) is positioned on the plane of the central cross section of the cylindrical milling cutter (50); the input shaft (41) and the intermediate shaft (42) are respectively provided with a locking mechanism (44), and the locking mechanism (44) is abutted on the first transmission group (20) which is spliced with the shaft where the locking mechanism is positioned;
a cylindrical milling cutter (50) with a through hole (51) in the center for inserting the output shaft (43) and rotatably arranged in the clamping cavity (14); any cross-sectional area of the cylindrical milling cutter (50) perpendicular to its axis is equal, and the side wall of the cylindrical milling cutter (50) has a cutting edge (52).
2. The distal femoral condyle grinding device of claim 1, wherein the first receiving cavity (11) is configured to receive an input shaft (41), the second receiving cavity (12) is configured to receive an output shaft (43), the first receiving cavity (11) and the second receiving cavity (12) are in communication with one another, and a central shaft (42) is configured to be co-inserted.
3. A distal femoral condyle grinding apparatus in accordance with claim 1, wherein all connections of the housing (10) to the drive shaft (40) are bearing-connected.
4. A distal femoral condyle grinding apparatus in accordance with claim 1, wherein the center of the clamping portion (13) is collinear with the axis of the cylindrical milling cutter (50).
5. A distal femoral condyle grinding device in accordance with claim 1, wherein the first drive wheel (21) and the first driven wheel (22) are perpendicular to each other in their axes of rotation, the first drive wheel (21) driving the first driven wheel (22) to transmit power from the input shaft (41) to the intermediate shaft (42).
6. A distal femoral condyle grinding device in accordance with claim 1, wherein the axes of rotation of the second drive wheel (31) and the second driven wheel (32) are parallel to each other, the second drive wheel (31) driving the second driven wheel (32) to transmit power from the intermediate shaft (42) to the output shaft (43).
7. The distal femoral condyle grinding apparatus defined in claim 1, wherein the clamping portion radius R2 is less than the cylindrical mill radius R3; the radius R1 of the shell where the second driven wheel is located is smaller than or equal to the radius R2 of the clamping part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310254876.8A CN115956977B (en) | 2023-03-16 | 2023-03-16 | Distal femur condyle grinding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310254876.8A CN115956977B (en) | 2023-03-16 | 2023-03-16 | Distal femur condyle grinding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115956977A CN115956977A (en) | 2023-04-14 |
| CN115956977B true CN115956977B (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310254876.8A Active CN115956977B (en) | 2023-03-16 | 2023-03-16 | Distal femur condyle grinding device |
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| Country | Link |
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| CN (1) | CN115956977B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118986468A (en) * | 2024-10-24 | 2024-11-22 | 北京爱康宜诚医疗器材有限公司 | Femur condyle arc osteotomy tool |
Citations (6)
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| CN86103224A (en) * | 1986-04-14 | 1987-10-28 | 巴特尔工业有限公司 | The inclined cutter that is used for surface cleaning head |
| JP2003126100A (en) * | 2001-10-24 | 2003-05-07 | Ikuma Kawai | Osteotomic equipment whose cutting blade moves back and forth by partial rotation |
| CN102085110A (en) * | 2011-03-12 | 2011-06-08 | 徐兆万 | Femoral head bone cutter |
| EP2537617A1 (en) * | 2011-06-20 | 2012-12-26 | Sandvik Intellectual Property AB | Segment for a milling tool and milling tool |
| CN108445841A (en) * | 2018-03-06 | 2018-08-24 | 好米动力设备有限公司 | A kind of device and method for processing single-screw compressor screw |
| CN111685848A (en) * | 2019-03-12 | 2020-09-22 | 宝楠生技股份有限公司 | Tibia osteotomy cutting device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1129677A3 (en) * | 2000-02-29 | 2003-04-02 | Brehm, Peter | Instrumentation for manufacturing the fixation surfaces for a knee joint endoprosthesis |
| CN100413475C (en) * | 2005-10-20 | 2008-08-27 | 北京茵普兰科技发展有限公司 | Femur formation and cutting center |
| CN102379735B (en) * | 2010-08-31 | 2013-11-06 | 北京蒙太因医疗器械有限公司 | Miniature condyle bone cutting device |
| CN204708928U (en) * | 2015-06-04 | 2015-10-21 | 肖平 | The osteotomy sickle that a kind of orthopaedics is special |
| CN110811757A (en) * | 2019-11-27 | 2020-02-21 | 中南大学湘雅医院 | Medical abrasive drill |
| CN211409242U (en) * | 2019-12-31 | 2020-09-04 | 江苏澳格姆生物科技有限公司 | Two unification intercondylar of knee joint cut bone device |
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2023
- 2023-03-16 CN CN202310254876.8A patent/CN115956977B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86103224A (en) * | 1986-04-14 | 1987-10-28 | 巴特尔工业有限公司 | The inclined cutter that is used for surface cleaning head |
| JP2003126100A (en) * | 2001-10-24 | 2003-05-07 | Ikuma Kawai | Osteotomic equipment whose cutting blade moves back and forth by partial rotation |
| CN102085110A (en) * | 2011-03-12 | 2011-06-08 | 徐兆万 | Femoral head bone cutter |
| EP2537617A1 (en) * | 2011-06-20 | 2012-12-26 | Sandvik Intellectual Property AB | Segment for a milling tool and milling tool |
| CN108445841A (en) * | 2018-03-06 | 2018-08-24 | 好米动力设备有限公司 | A kind of device and method for processing single-screw compressor screw |
| CN111685848A (en) * | 2019-03-12 | 2020-09-22 | 宝楠生技股份有限公司 | Tibia osteotomy cutting device |
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| Publication number | Publication date |
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| CN115956977A (en) | 2023-04-14 |
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Effective date of registration: 20240819 Address after: 102200 Beijing Changping District science and Technology Park No. 10, two floor, Xingye building, Bai Fu Quan road. Patentee after: BEIJING AK MEDICAL Co.,Ltd. Country or region after: China Address before: 102200 Beijing Changping District science and Technology Park No. 10, two floor, Xingye building, Bai Fu Quan road. Patentee before: BEIJING AK MEDICAL Co.,Ltd. Country or region before: China Patentee before: AFFILIATED HOSPITAL OF JINING MEDICAL University |
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