CN111603233A - Bone extension intramedullary nail device - Google Patents
Bone extension intramedullary nail device Download PDFInfo
- Publication number
- CN111603233A CN111603233A CN202010543857.3A CN202010543857A CN111603233A CN 111603233 A CN111603233 A CN 111603233A CN 202010543857 A CN202010543857 A CN 202010543857A CN 111603233 A CN111603233 A CN 111603233A
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- CN
- China
- Prior art keywords
- nail
- rotor
- seat
- nail body
- locking
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
- A61B17/725—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with locking pins or screws of special form
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7216—Intramedullary pins, nails or other devices for bone lengthening or compression
- A61B17/7225—Intramedullary pins, nails or other devices for bone lengthening or compression for bone compression
Abstract
The invention discloses a bone lengthening intramedullary nail device, which relates to the technical field of bone lengthening and comprises an intramedullary nail and an external stator; the intramedullary nail comprises a near-end nail body and a far-end nail body, wherein the near-end nail body is of a hollow structure with an opening at one end, a screw rod is rotatably arranged in the near-end nail body, a rotor is fixedly sleeved at one end of the screw rod, one end of the far-end nail body is slidably arranged in the near-end nail body, and one end of the far-end nail body, which is positioned in the near-end nail body, is in threaded connection with the screw; the rotor is uniformly provided with a plurality of permanent magnets at the circumference, the magnetic poles of one ends of two adjacent permanent magnets close to the rotor are opposite, the external stator is provided with a three-phase winding coil, and the external stator can be coupled with the rotor after being electrified to drive the rotor to rotate. The intramedullary nail device for bone lengthening can drive the bone to stretch in the inner part, can relieve the pain of a patient compared with a stretching mode of external machinery, is easy to operate and control, and can effectively avoid secondary damage to the patient during the bone lengthening.
Description
Technical Field
The invention relates to the technical field of bone lengthening, in particular to a bone lengthening intramedullary nail device.
Background
Definition of bone lengthening: the bone is cut, soft tissue and blood supply are reserved, a special traction device is adopted to fix two ends, tension is gradually applied by applying a tension stress rule to slowly draw a bone section, organism tissues are continuously stimulated, the regeneration potential of the human tissues is stimulated, new bone is formed in the osteotomy gap, and the purpose of bone regeneration is achieved. In the prior art, the uneven legs of a patient caused by bone defects are treated by adopting a medical method of extending bones by external mechanical stretching. In the method, because the traction device is arranged outside the body, the stretching direction, the stretching force, the stretching amount and the like are difficult to be accurately controlled, and great pain is brought to a patient during treatment; meanwhile, the doctor is difficult to control the operation, and certain medical risks exist.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the intramedullary nail device for lengthening the bone, which drives the intramedullary nail inside the bone to stretch the bone, can relieve the pain of a patient compared with an external mechanical stretching mode, is easy to operate and control and can effectively avoid secondary damage to the patient during the bone lengthening period.
The purpose of the invention is realized by the following technical scheme:
a bone lengthening intramedullary nail device comprising an intramedullary nail and an external stator;
the intramedullary nail comprises a proximal nail body and a distal nail body, the proximal nail body is of a hollow structure with an opening at one end, a screw rod is rotatably arranged in the proximal nail body, a rotor is fixedly sleeved at one end of the screw rod, one end of the distal nail body is slidably arranged in the proximal nail body, and one end of the distal nail body, which is positioned in the proximal nail body, is in threaded connection with the screw rod;
the rotor is provided with a plurality of permanent magnets in a circumferentially and uniformly distributed manner, the adjacent permanent magnets are close to opposite magnetic poles at one end of the rotor, a three-phase winding coil is arranged on the external stator, and the external stator can be coupled with the rotor to drive the rotor to rotate after being electrified.
Furthermore, the variable-frequency speed regulator is electrically connected with the three-phase winding coil of the external stator.
Further, the near-end nail body comprises a near-end locking nail tail, a rotor shell and a near-end nail body shell,
the near-end nail tail comprises a connecting seat, a locking nail seat a and a locking cap which are sequentially arranged, the locking nail a is transversely inserted into the locking nail seat a, a connecting screw is fixedly arranged at one end of the connecting seat, and the locking nail seat a and the locking cap are both in threaded connection with the connecting screw;
the rotor shell comprises a lower shell seat and an upper shell seat, one end of the lower shell seat is connected with one end of the upper shell seat through threads, and one end of the upper shell seat, far away from the lower shell seat, is fixedly connected with one end of the connecting seat, far away from the locking nail seat a, through a bolt;
one end of the near-end nail body shell is connected with one end, far away from the upper shell seat, of the lower shell seat through a bolt, the screw rod is rotatably arranged in the near-end nail body shell, and the rotor is arranged in the rotor shell.
Furthermore, one end of the screw is fixedly connected with a guide post, the other end of the guide post is fixedly connected with a connecting shaft, the rotor is fixedly sleeved on the connecting shaft,
the guide post with the inner wall looks adaptation of near-end nail body shell, the one end of near-end nail body shell the lower shell seat with the upper shell seat with the connecting axle all passes through the bearing and connects.
Furthermore, the far-end nail body comprises a sliding column, a sliding rail is arranged on the side wall of the sliding column, a sliding groove is processed on the inner wall of the near-end nail body shell, one end of the sliding column is slidably arranged in the near-end nail body shell, and the sliding rail is matched with the sliding groove;
the other end of the sliding column is fixedly provided with a connecting screw rod b, the connecting screw rod b is sequentially connected with a locking nail seat b and a nail head through threads, and a locking nail b is transversely inserted into the locking nail seat b.
The invention has the beneficial effects that:
this bone extension intramedullary nail device, including intramedullary nail and outside stator, the intramedullary nail includes the near-end nail body and the distal end nail body, and the internal rotatable screw rod that is provided with of near-end nail, the fixed cover of one end of screw rod are equipped with the rotor, and the one end slidable of the distal end nail body sets up in the near-end nail body and passes through threaded connection with the screw rod. The external stator is provided with a three-phase winding coil, and after the external stator is electrified, a rotating magnetic field is generated in the external stator to drive the rotor to rotate, so that the far-end nail body is driven to translate to realize the strand extension pulling-up process. In the stretching process, the stretching force and the stretching speed are determined by the rotating speed of the rotor, the operation of the rotor is controlled by the size and the frequency of the electrified current in the external stator, and the variable-frequency speed regulator can be used for controlling, so that the control process is simple, convenient and accurate. The rotating rotor and the screw rod are arranged inside the inner nail and are not contacted with a patient, the stretching direction is stably and controllably limited by the structure of the inner nail when stretching, in addition, the stretching force and the stretching speed can be accurately controlled, when the stretching force and the stretching speed are applied to treatment, the pain of a patient can be effectively relieved, and the secondary injury to the patient during the bone lengthening period is avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of a bone lengthening intramedullary nail device according to the present invention;
FIG. 2 is a schematic view of a disassembled intramedullary nail of the intramedullary lengthening nail device of the present invention;
FIG. 3 is a schematic view of the coupling structure of the external stator and rotor of the intramedullary nail device according to the present invention;
FIG. 4 is a schematic view of a split structure of a proximal nail body of the intramedullary nail device according to the present invention;
FIG. 5 is a schematic illustration showing a disassembled structure of the connection portion between the proximal nail body and the distal nail body of the intramedullary nail device according to the present invention;
fig. 6 is a schematic view of a disassembled structure of the distal nail body of the intramedullary nail device for lengthening bone according to the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, a bone lengthening intramedullary nail device includes an intramedullary nail and an external stator 10.
As shown in fig. 2, the intramedullary nail comprises a proximal nail body 30 and a distal nail body 20, wherein the proximal nail body 30 is a hollow structure with an open end, a screw rod 42 is rotatably disposed in the proximal nail body 30, a rotor 41 is fixedly sleeved at one end of the screw rod 42, one end of the distal nail body 20 is slidably disposed in the proximal nail body 30, and one end of the distal nail body 20 located in the proximal nail body 30 is in threaded connection with the screw rod 42. Because the distal shank 20 can only slide in the proximal shank 30, the rotational freedom of the distal shank 20 following the rotation of the screw 42 is limited, and the two form a set of screw transmission mechanisms, so that the distal shank 20 can move axially along the proximal shank 30 when the screw 42 rotates.
A plurality of permanent magnets are uniformly distributed on the circumference of the rotor 41, and the magnetic poles of one end of each two adjacent permanent magnets close to the rotor are opposite; the external stator 10 is provided with three-phase winding coils, and the external stator 10 can be coupled with the rotor 41 after being electrified, and the structure of the external stator is shown in fig. 3, and the principle is similar to that of a permanent magnet synchronous motor. When the three-phase winding coil of the external stator 10 is energized with ac power, a rotating magnetic field is generated in the external stator 10, and the permanent magnet fixedly mounted on the rotor 41 generates a relative fixed magnetic field, so that the rotor 41 starts to rotate in the rotating magnetic field according to the principle that like poles attract each other and opposite poles repel each other, thereby driving the distal nail body 20 to move axially.
In specific implementation, because the rotor 41 has a small size, in order to ensure convenient manufacturing and sensitive rotation, four permanent magnets may be disposed on the inner rotor 41, and the outer sides thereof are sequentially N-level, S-level, N-level, and S-level, so that the outer magnetic poles of the permanent magnets are subjected to attractive or repulsive forces under the action of the rotating magnetic field generated by the outer stator 10, thereby driving the rotor 41 to rotate. The three-phase winding coils on the outer stator 10 may be arranged in a manner that opposite coils are oppositely wound, i.e., current flows inward on one side and outward on the other side, and a current loop may be generated after being electrified, so that a magnetic field is generated between the two sides. Because the phase of each phase winding is different when the phase winding is energized, the magnetic field generated by each phase is different in magnitude, and the magnetic field formed in the whole external stator 10 rotates in the direction of the resultant magnetic field, thereby realizing the process of driving the rotor 41 to rotate.
Further, the intramedullary nail device for bone extension further comprises a variable frequency speed regulator 11, and the variable frequency speed regulator 11 is electrically connected with the three-phase winding coil of the external stator 10. When the variable-frequency speed regulator is used, the variable-frequency speed regulator 11 is connected with a variable-frequency power supply, and the intensity and the rotating speed of the rotating magnetic field in the external stator 10 can be correspondingly adjusted by adjusting the magnitude and the frequency of current through the variable-frequency speed regulator 11. When in use, a medical scheme needs to be made in advance, and a proper femoral extension intramedullary nail is selected: for example, in the stretching process, if the stretching is performed for 1mm in one day and divided into three times, the stretching is performed for 0.2mm-0.3mm each time; the length of each stretch can be converted into the number of turns of the thread required to be rotated according to the pitch of the screw 42. Meanwhile, the force required by one rotation of the thread, the intensity of the external rotating magnetic field and the electrifying time of the external stator are measured through a simulation environment. And then the data are used as the standard to carry out actual operation. When the intramedullary nail is clinically used, the intramedullary nail is placed in a bone marrow cavity of a patient, the two ends of the intramedullary nail are respectively fixed and positioned with bones through locking nails, the rotor 41 is relatively fixed relative to the proximal end position of the intramedullary nail, the external stator 10 outside the body is arranged at a position coupled with the rotor 41 corresponding to the position, then, the power-on control is carried out according to the parameters measured by the simulation, the rotor 41 is driven to rotate through the rotating magnetic field in the external stator 10, so that the distal nail body 20 moves axially, the proximal end and the distal end of the intramedullary nail are far away from each other, and the stretching process is realized. When the stretching is performed to a predetermined length, the power supply to the three-phase winding coil of the outer stator 10 is cut off, the rotating magnetic field in the coil disappears, the rotor 41 stops rotating, and the stretching process is stopped.
In the above arrangement, the rotation speed of the rotor 41 is precisely controlled by the variable frequency speed regulator 11, and the operation is simple and convenient; the intramedullary nail is arranged in a bone marrow cavity, power is provided by the internal drive of the rotor 41, no external mechanical stretching mechanism is provided, the rotating rotor 41 and the screw rod 42 are both positioned in the intramedullary nail and are not contacted with a patient, meanwhile, the extension direction of the intramedullary nail is stable and controllable, the control of the stretching force and the stretching amount is more accurate, the pain of the patient can be effectively relieved, and the secondary injury to the patient during the bone extension period is avoided.
In particular implementation, as shown in fig. 4-6, the proximal shank 30 includes a proximal locking shank, a rotor housing, and a proximal shank housing 37. The near-end nail tail comprises a connecting seat 34, a locking nail seat a32 and a locking cap 31 which are sequentially arranged, a locking nail a33 is transversely inserted into the locking nail seat a32, a connecting screw rod is fixedly arranged at one end of the connecting seat 34, and the locking nail seat a32 and the locking cap 31 are both in threaded connection with the connecting screw rod. The locking nail a33 is used for fixing the proximal nail body 30 and the bone, and the locking seat a32 can be screwed by the locking cap 31 after being connected with the connecting screw, so that the whole connecting structure is stable. The rotor shell comprises a lower shell seat 36 and an upper shell seat 35, one end of the lower shell seat 36 is connected with one end of the upper shell seat 35 through threads, and one end of the upper shell seat 35, far away from the lower shell seat 36, is fixedly connected with one end of the connecting seat 34, far away from the locking nail seat a32, through a bolt. One end of the proximal nail housing 37 is connected with one end of the lower housing 36 far away from the upper housing 35 through a bolt, the screw 42 is rotatably arranged in the proximal nail housing 37, and the rotor 41 is arranged in the rotor housing. Since before each application, in order to ensure the reliability of the stretching action, it is necessary to measure the life of the permanent magnets on the rotor 41 and verify their magnetic properties. Therefore, by adopting the split structure of the near-end nail body 30, each part can be quickly assembled and disassembled by threaded connection or bolt connection, and the use aspect is convenient.
Furthermore, one end of the screw rod 42 is fixedly connected with a guide post 43, the other end of the guide post 43 is fixedly connected with a connecting shaft 44, and the rotor 41 is fixedly sleeved on the connecting shaft 44. One end of the proximal nail body shell 37, the lower shell seat 36 and the upper shell seat 35 are connected with the connecting shaft 44 through the bearing 45, and the rotation process of the screw rod 42 is smooth; meanwhile, the guide post 43 is matched with the inner wall of the near-end nail body shell 37, and is limited and supported by the inner wall of the near-end nail body shell 37 during rotation, so that the stability of the rotation process is facilitated.
Further, the distal nail body 20 comprises a sliding column 21, a sliding rail is arranged on the side wall of the sliding column 21, a sliding groove is processed on the inner wall of the proximal nail body housing 37, one end of the sliding column 21 is slidably arranged in the proximal nail body housing 37, and the sliding rail is matched with the sliding groove; the other end of the sliding column 21 is fixedly provided with a connecting screw b22, the connecting screw b22 is connected with a locking nail seat b23 and a nail head 25 in sequence through threads, and a locking nail b24 is transversely inserted into the locking nail seat b 23. Through the adaptation of the slide rail and the slide groove, the slide of the slide column 21 is guided and guided, so that the slide column can move along the designated direction when the screw rod 42 rotates, and the pulling direction is ensured.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. An intramedullary nail device for lengthening bones, characterized in that it comprises an intramedullary nail and an external stator (10);
the intramedullary nail comprises a near-end nail body (30) and a far-end nail body (20), wherein the near-end nail body (30) is of a hollow structure with one open end, a screw rod (42) is rotatably arranged in the near-end nail body (30), a rotor (41) is fixedly sleeved at one end of the screw rod (42), one end of the far-end nail body (20) is slidably arranged in the near-end nail body (30), and one end of the far-end nail body (20) positioned in the near-end nail body (30) is in threaded connection with the screw rod (42);
the rotor (41) is provided with a plurality of permanent magnets in a circumferentially and uniformly distributed mode, the permanent magnets are adjacent to opposite magnetic poles at one end of the rotor, a three-phase winding coil is arranged on the external stator (10), and the external stator (10) can be coupled with the rotor (41) to drive the rotor (41) to rotate after being electrified.
2. The intramedullary nail device according to claim 1, further comprising a variable frequency governor (11), the variable frequency governor (11) being electrically connected to the three-phase winding coils of the external stator (10).
3. The intramedullary nail device according to claim 2, wherein the proximal shank (30) comprises a proximal locking shank, a rotor housing and a proximal shank housing (37),
the near-end nail tail comprises a connecting seat (34), a locking nail seat a (32) and a locking cap (31) which are sequentially arranged, the locking nail seat a (33) is transversely inserted into the locking nail seat a (32), one end of the connecting seat (34) is fixedly provided with a connecting screw rod, and the locking nail seat a (32) and the locking cap (31) are both in threaded connection with the connecting screw rod;
the rotor shell comprises a lower shell seat (36) and an upper shell seat (35), one end of the lower shell seat (36) is connected with one end of the upper shell seat (35) through threads, and one end, far away from the lower shell seat (36), of the upper shell seat (35) is fixedly connected with one end, far away from the locking nail seat a (32), of the connecting seat (34) through a bolt;
one end of the near-end nail body shell (37) is connected with one end, far away from the upper shell seat (35), of the lower shell seat (36) through a bolt, the screw rod (42) is rotatably arranged in the near-end nail body shell (37), and the rotor (41) is arranged in the rotor shell.
4. The intramedullary nail device for lengthening bone according to claim 3, wherein a guiding post (43) is fixedly connected to one end of the screw rod (42), a connecting shaft (44) is fixedly connected to the other end of the guiding post (43), the rotor (41) is fixedly sleeved on the connecting shaft (44),
the guide post (43) is matched with the inner wall of the near-end nail body shell (37), and one end of the near-end nail body shell (37), the lower shell seat (36) and the upper shell seat (35) are connected with the connecting shaft (44) through a bearing (45).
5. The intramedullary nail device for bone lengthening according to claim 3, wherein the distal nail body (20) comprises a sliding column (21), a sliding rail is arranged on a side wall of the sliding column (21), a sliding slot is processed on an inner wall of the proximal nail body housing (37), one end of the sliding column (21) is slidably arranged in the proximal nail body housing (37), and the sliding rail is matched with the sliding slot;
the other end of the sliding column (21) is fixedly provided with a connecting screw b (22), the connecting screw b (22) is sequentially connected with a locking nail seat b (23) and a nail head (25) through threads, and a locking nail b (24) is transversely inserted into the locking nail seat b (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010543857.3A CN111603233A (en) | 2020-06-15 | 2020-06-15 | Bone extension intramedullary nail device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010543857.3A CN111603233A (en) | 2020-06-15 | 2020-06-15 | Bone extension intramedullary nail device |
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| Publication Number | Publication Date |
|---|---|
| CN111603233A true CN111603233A (en) | 2020-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010543857.3A Pending CN111603233A (en) | 2020-06-15 | 2020-06-15 | Bone extension intramedullary nail device |
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| CN (1) | CN111603233A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043155A (en) * | 2006-03-24 | 2007-09-26 | 杨光笋 | DC frequency conversion brushless torque motor |
| CN101232228A (en) * | 2007-01-28 | 2008-07-30 | 杨光笋 | Anti-theft harmonic brushless hub electric motor |
| CN101568309A (en) * | 2006-10-03 | 2009-10-28 | 阿诺·苏贝朗 | Intracorporeal elongation device with a permanent magnet |
| US7753915B1 (en) * | 2007-06-14 | 2010-07-13 | August Eksler | Bi-directional bone length adjustment system |
| CN101938950A (en) * | 2008-03-19 | 2011-01-05 | 阿尔托大学基金会 | Internal osteodistraction device |
| EP2915496A1 (en) * | 2014-03-06 | 2015-09-09 | MPS Micro Precision Systems AG | Implantable device |
| CN105011997A (en) * | 2009-09-04 | 2015-11-04 | 埃利普斯科技有限公司 | Bone growth device and method |
| CN105377194A (en) * | 2013-03-04 | 2016-03-02 | 机械-转导有限责任公司 | Dynamic force generation for bone repair |
| CN106059144A (en) * | 2016-07-11 | 2016-10-26 | 重庆乔麦科技有限公司 | Same-polarity multiple-pole motor |
-
2020
- 2020-06-15 CN CN202010543857.3A patent/CN111603233A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043155A (en) * | 2006-03-24 | 2007-09-26 | 杨光笋 | DC frequency conversion brushless torque motor |
| CN101568309A (en) * | 2006-10-03 | 2009-10-28 | 阿诺·苏贝朗 | Intracorporeal elongation device with a permanent magnet |
| CN101232228A (en) * | 2007-01-28 | 2008-07-30 | 杨光笋 | Anti-theft harmonic brushless hub electric motor |
| US7753915B1 (en) * | 2007-06-14 | 2010-07-13 | August Eksler | Bi-directional bone length adjustment system |
| CN101938950A (en) * | 2008-03-19 | 2011-01-05 | 阿尔托大学基金会 | Internal osteodistraction device |
| CN105011997A (en) * | 2009-09-04 | 2015-11-04 | 埃利普斯科技有限公司 | Bone growth device and method |
| CN105377194A (en) * | 2013-03-04 | 2016-03-02 | 机械-转导有限责任公司 | Dynamic force generation for bone repair |
| EP2915496A1 (en) * | 2014-03-06 | 2015-09-09 | MPS Micro Precision Systems AG | Implantable device |
| CN106059144A (en) * | 2016-07-11 | 2016-10-26 | 重庆乔麦科技有限公司 | Same-polarity multiple-pole motor |
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Application publication date: 20200901 |
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