CN218888235U

CN218888235U - High-speed brushless motor and bone grinding device for orthopedic surgery

Info

Publication number: CN218888235U
Application number: CN202320123813.4U
Authority: CN
Inventors: 陈依群; 任杰; 崔莉英
Original assignee: Xi'an Sancai Electronic Technology Co ltd
Current assignee: Xi'an Sancai Electronic Technology Co ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-04-18
Anticipated expiration: 2033-01-13

Abstract

The application provides a high-speed brushless motor and bone grinding device for bone surgery, high-speed brushless motor includes: a motor housing, a stator assembly and a rotor assembly; the stator assembly is arranged in the motor shell and comprises a stator core and a copper wire packet arranged on the inner wall of the stator core; the rotor assembly comprises a rotating shaft, first magnetic steel, a fixed seat and second magnetic steel; first magnet steel is fixed on the epaxial outer wall of rotation, has seted up the through-hole on the fixing base, and the fixing base passes through the through-hole cover to be established in the axis of rotation, and second magnet steel sets up in the fixing base, and the axis of rotation axial runs through stator core and both ends and passes through the bearing rotation and connect on motor housing. This application is through the axis of rotation axial that will be provided with first magnet steel running through stator core and the fixing base that the cover was provided with the inside second magnet steel in the axis of rotation for brushless motor still has higher output torque under the limited circumstances in space in a direction, thereby can reach higher output under equal rotational speed.

Description

High-speed brushless motor and bone grinding device for orthopedic surgery

Technical Field

The application relates to the technology of medical equipment, in particular to a high-speed brushless motor and a bone grinding device for orthopedic surgery.

Background

In recent years, various bone tissue diseases have been increasing, for example: hyperosteogeny, osteoarthritis, bone atrophy or necrosis, bone cancer, bone fracture, etc., thus, plastic surgery as well as minimally invasive surgery should be carried out and developed vigorously. In the process of bone surgery, drilling, grinding, milling and other modes are often adopted, and a power device is inevitably used when the bone surgery is carried out by adopting the drilling, grinding, milling and other modes, and the power device mainly comprises a brush motor and a brushless motor. The brush motor is a rotating motor which is internally provided with a brush device and converts electric energy into mechanical energy (a motor) or converts mechanical energy into electric energy (a generator); the brushless direct current motor is composed of a motor main body and a driver, and is a typical electromechanical integration product. Compared with a brush motor, the brushless motor has 1) no brush and low interference; 2) The noise is low, and the operation is smooth; 3) Long service life, low maintenance cost and the like, and is widely applied.

In order to improve the rotating speed of a brushless motor in the orthopedic surgery, the conventional bone grinding device for the orthopedic surgery usually adopts a measure of reducing the power of the brushless motor so as to realize the purpose of high-speed operation of the brushless motor in the orthopedic surgery process, the power of the brushless motor is small, and the inertia of the motor is small, so that in the actual orthopedic surgery process, doctors often feel that the power of the brushless motor is insufficient, the stress applied to the surgery is reduced, the surgery time can be prolonged, and the efficiency of drilling, grinding, milling and the like in the high-speed orthopedic surgery process is reduced.

SUMMERY OF THE UTILITY MODEL

The application provides a high-speed brushless motor and bone grinding device for orthopedic surgery for solve above-mentioned technical problem.

In order to solve the technical problems, the application adopts the following technical scheme:

in a first aspect, the present application provides a high-speed brushless motor comprising: a motor housing, a stator assembly and a rotor assembly;

the stator assembly is arranged in the motor shell and comprises a cylindrical stator core and a copper wire packet arranged on the inner wall of the stator core;

the rotor assembly comprises a rotating shaft, first magnetic steel, a fixed seat and second magnetic steel; first magnet steel is fixed on the epaxial outer wall of rotation, the through-hole has been seted up on the fixing base, the fixing base passes through the through-hole cover is established in the axis of rotation, the second magnet steel sets up in the fixing base, the axis of rotation axial runs through stator core and both ends are passed through the bearing and are rotated and connect and be connected on the motor housing.

Optionally, the heat dissipation device further comprises a heat dissipation assembly;

the heat dissipation assembly comprises an inner fixing ring, an outer fixing ring, a plurality of fan blades and a plurality of heat dissipation holes;

the internal fixation ring cover is established in the axis of rotation, and is a plurality of the one end equidistant setting of fan blade is in on the internal fixation ring's the periphery wall, and is a plurality of the other end equidistant setting of fan blade is in on the internal perisporium of external fixation ring, it is a plurality of the louvre is evenly seted up on the motor housing, every the louvre be used for with the heat that brushless motor operation process produced discharges extremely outside the motor housing, every be provided with the filter screen on the louvre.

Optionally, a plurality of copper wire packages are provided, and the plurality of copper wire packages are respectively arranged on the inner wall of the stator core;

the stator core is made of permalloy.

Optionally, a control member is also included;

the control piece is located outside the motor shell, the control piece with a plurality of copper coil electricity is connected for control is a plurality of the current direction of copper coil.

Optionally, the first magnetic steel is a magnetic steel sleeve made of a novel strong magnetic rare earth material, and the first magnetic steel is sleeved on the rotating shaft.

Optionally, a balance sleeve is arranged between each of the two ends of the first magnetic steel and the bearing, and the balance sleeve is sleeved on the rotating shaft.

Optionally, the length of the stator core is equal to the length of the first magnetic steel.

Optionally, the second magnetic steel is one or more, and the second magnetic steel is sensor magnetic steel.

In a second aspect, the present application provides a bone grinding device for orthopedic surgery, comprising a connecting member, a bone grinding bit and the high-speed brushless motor of any one of the above;

one end of the connecting piece is detachably connected to one end, far away from the fixing seat, of the rotating shaft, and one end, far away from the rotating shaft, of the connecting piece is connected with the bone grinding cutter head.

Optionally, the connecting piece comprises a fork and a handle;

one end of the shifting fork is arranged on the rotating shaft, the other end of the shifting fork is clamped with one end of the knife handle, and the other end of the knife handle is provided with the bone grinding knife head.

1) According to the high-speed brushless motor, the stator assembly is arranged in the stator accommodating space on the motor shell, and the stator core in the stator assembly and the copper wire package arranged in the stator core are used for generating induced electromotive force when current passes, so that electric energy conversion is realized; the rotor subassembly runs through stator core, first magnet steel is located stator core's inside, the second magnet steel is located the outside epaxial fixing base that rotates of rotor core, second magnet steel on first magnet steel and the fixing base all rotates along with the rotation of axis of rotation, first magnet steel and second magnet steel are used for the induced electromotive force and produce electromagnetic torque when through the electric current, and the axis of rotation passes through rolling bearing and rotates with motor housing and be connected and be used for supporting the weight of rotor, transmission torque and output mechanical power, the setting up of first magnet steel and second magnet steel makes brushless motor still have higher output torque under the limited condition in space in a direction, and then reach higher output under equal rotational speed.

2) The application provides an orthopedic surgery is with grinding bone device drives the rotation of the mill bone tool bit through connecting piece and rotation axis connection through brushless motor's rotation, and then realizes the mill bone operation in the bone surgery through the rotation of grinding the bone tool bit, because brushless motor can still have higher output torque under the limited condition in space in a direction for brushless motor can reach higher output under equal rotational speed.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a brushless motor according to an embodiment of the present application;

fig. 2 is a schematic diagram illustrating an internal structure of a brushless motor according to another embodiment of the present application;

fig. 3 is a schematic structural view of a stator assembly according to another embodiment of the present disclosure;

fig. 4 is an expanded cross-sectional schematic view of a stator assembly provided by another embodiment of the present application;

FIG. 5 is a top view of a stator assembly provided in another embodiment of the present application;

fig. 6 is a schematic view illustrating an internal structure of a rotor assembly according to another embodiment of the present application;

fig. 7 is a schematic structural diagram of an orthopedic surgical bone grinding device according to another embodiment of the present application.

In the figure: 100. a motor housing; 101. heat dissipation holes; 200. a stator assembly; 201. a stator core; 202. a copper wire package; 300. a rotor assembly; 301. a rotating shaft; 302. a first magnetic steel; 303. a fixed seat; 304. a second magnetic steel; 305. a bearing; 306. a balance sleeve; 400. a heat dissipating component; 401. an inner fixing ring; 402. an outer fixing ring; 403. a fan blade; 500. shifting a fork; 501. a pin hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Magnetic steel: the magnetic steel is made of several hard strong metals, such as iron, aluminum, nickel, cobalt, and the like, and sometimes copper, niobium, and tantalum, and is used for manufacturing the super-hardness permanent magnet alloy.

A stator core: the stator coil fixing structure is an important part for forming a motor magnetic flux loop and fixing a stator coil, and is formed into a whole by pressing a punching sheet and various fasteners.

Referring to fig. 1 to 6, in a first aspect, the present application provides a high-speed brushless motor including: motor housing 100, stator assembly 200, and rotor assembly 300.

The stator assembly 200 is fixedly installed in the motor housing 100, a stator accommodating space is formed in a space in which the stator assembly 200 is installed in the motor housing 100, and the stator assembly 200 includes a cylindrical stator core 201 and a copper wire package 202 disposed on an inner wall of the stator core 201; the stator core 201 in the stator assembly 200 and the copper wire package 202 arranged in the stator core 201 are used for generating induced electromotive force when current passes through, so that electric energy conversion is realized.

The rotor assembly 300 comprises a rotating shaft 301, a first magnetic steel 302, a fixed seat 303 and a second magnetic steel 304; the first magnetic steel 302 is fixed on the outer wall of the rotating shaft 301, the fixed seat 303 is provided with a through hole, the fixed seat 303 is sleeved on the rotating shaft 301 through the through hole, the second magnetic steel 304 is arranged in the fixed seat 303, the rotating shaft 301 axially penetrates through the stator core 201, two ends of the rotating shaft are rotatably connected to the motor shell 100 through the bearing 305, and a bearing installation space is formed in a space for installing the bearing 305 in the motor shell 100; wherein, rotor subassembly 300 runs through stator core 201, first magnet steel 302 is located the inside of stator core 201, second magnet steel 304 is located the fixing base 303 on the outside axis of rotation 301 of stator core 201, second magnet steel 304 on first magnet steel 302 and the fixing base 303 all rotates along with the rotation of axis of rotation 301, first magnet steel 302 and second magnet steel 304 are used for the induced electromotive force and produce electromagnetic torque when passing through the electric current, and axis of rotation 301 passes through bearing 305 and rotates with motor housing 100 to be connected and be used for supporting rotor subassembly 300's weight, transmission torque and output mechanical power, first magnet steel 302 and second magnet steel 304 set up and make brushless motor still have higher output torque under the limited condition in space in a direction, and then reach higher output under equal rotational speed.

Specifically, second magnet steel 304 in the application is the sensor magnet steel, first magnet steel 302 sets up on axis of rotation 301, second magnet steel 304 sets up in the fixing base 303, in the pivoted in-process under the magnetic field effect when axis of rotation 301, first magnet steel 302 rotates along with axis of rotation 301's rotation, when first magnet steel 302 rotates, first magnet steel 302's existence can be sensed to second magnet steel 304, second magnet steel 304 can detect and export first magnet steel 302's speed signal, therefore, axis of rotation 301 among the brushless motor is every round of rotation, second magnet steel 304 just can obtain a speed signal, can real-time detection through second magnet steel 304 promptly out brushless motor's rotational speed.

The brushless motor that adopts among the bone grinding device for the existing bone surgery can give off more heat around it at during operation especially long-time during operation, and the heat can concentrate on brushless motor's inside and week side, easily influences brushless motor's normal work in the past for a long time, still easily leads to brushless motor to damage because of overheated when serious, causes unnecessary economic loss. Based on this, this application adopts the following technical scheme to realize:

in some embodiments, the brushless motor of the present application further comprises a heat dissipation assembly 400; specifically, the heat dissipation assembly includes an inner fixing ring 401, an outer fixing ring 402, a plurality of fan blades 403 and a plurality of heat dissipation holes 101; specifically, interior solid fixed ring 401 cover is established on axis of rotation 301, the one end equidistant setting of a plurality of fan blades 403 is on the periphery wall of interior solid fixed ring 401, the other end equidistant setting of a plurality of fan blades 403 is on the internal perisporium of outer solid fixed ring 402, a plurality of louvres 101 are evenly seted up on motor housing 100, every louvre 101 is used for discharging the heat that brushless motor operation process produced to motor housing 100 outside, with this temperature rise that reduces brushless motor operation in-process, the influence of the heat that significantly reduces to brushless motor, and then can prolong brushless motor's life. Each heat dissipation hole 101 is provided with a filter screen, wherein the filter screen can prevent impurities (such as dust and the like) outside the motor casing from entering the motor casing 100 and adhering to each component in the motor casing 100, and the impurities can block each component after being adhered for a long time, thereby affecting the normal operation of each component in the outer casing 100. The aperture size of filter screen can distribute away for the heat in the motor housing 100, and the outer impurity of motor housing 100 can not enter into motor housing 100 through the filter screen in, the aperture of filter screen can be injectd according to actual need, as long as can reach above-mentioned purpose.

Optionally, louvre 101 still can be used to connect the air exhauster through the exhaust duct, utilizes the air exhauster to take out the heat in motor housing 100 to this takes out the heat that produces in the brushless motor operation in-process in motor housing 100 from motor housing 100 fast, reduces the temperature rise of brushless motor operation in-process, and the heat that significantly reduces is to brushless motor's influence, and then can prolong brushless motor's life.

In the above embodiment, the plurality of blades 403 are fixed between the inner fixing ring 401 and the outer fixing ring 402 at equal intervals, the inner fixing ring 401 is sleeved on the rotating shaft 301, the rotating shaft 301 drives the inner fixing ring 401, the outer fixing ring 402 and the blades 403 between the inner fixing ring 401 and the outer fixing ring 402 to rotate, the blades 403 discharge heat generated by the brushless motor in the operation process out of the motor housing 100 through the heat dissipation holes 101 in the motor housing 100 in the rotation process, the blades 403 are made of a high temperature resistant material, the number of the blades 403 can be limited according to actual needs, and the application is not specifically limited herein.

In some embodiments, the plurality of copper wire packages 202 are provided, and the plurality of copper wire packages 202 are respectively disposed on the inner wall of the stator core 201; wherein, a plurality of copper solenoid 202 evenly distributed is on stator core 201's inner wall, and then makes the magnetic field intensity of production more stable.

A plurality of embedding grooves are uniformly formed in the inner wall of the stator core 201, the plurality of embedding grooves correspond to the plurality of copper wire packets 202 one by one, and each embedding groove is internally provided with one copper wire packet 202; wherein, the copper package 202 can produce the magnetic field under the effect of electric current after circular telegram.

The stator core 201 is made of permalloy, and the permalloy has high magnetic flux rate and extremely low magnetic leakage performance, so that the brushless motor is ensured to have enough magnetic field intensity.

In some embodiments, the high speed brushless electric machine herein further comprises a control member; specifically, the control member is located outside the motor housing 100, and the control member is electrically connected to the plurality of copper wire packets 202 and is configured to control a current direction of the plurality of copper wire packets 202. When the control element is an encoder, the encoder is electrically connected with the copper wire package and is used for controlling the current direction of the copper wire package 202, and a magnetic field is generated under the action of the current to drive the rotating shaft 301 to rotate; when the control member is a driving circuit and a cable lead, the driving circuit is electrically connected to the copper wire package 202 through the cable lead, and is used for controlling the current direction of the copper wire package 202, and generating a magnetic field under the action of the current to drive the rotation of the rotation shaft 301.

In some embodiments, the first magnetic steel 302 in the present application is a magnetic steel sleeve made of a novel strong magnetic rare earth material, and the first magnetic steel 302 is sleeved on the rotating shaft 301, wherein the novel strong magnetic rare earth has the advantages of small volume, light weight and strong magnetism, and therefore, the first magnetic steel 302 made of the novel strong magnetic rare earth material enables the brushless motor to generate a sufficient magnetic field, and the mass of the brushless motor is light and convenient to use.

In some embodiments, balance sleeves 306 are respectively arranged between two ends of the first magnetic steel 302 and the bearing 305, the balance sleeves 306 are sleeved on the rotating shaft 301, that is, two balance sleeves 306 are arranged in the present application, wherein the two balance sleeves 306 are made of metal copper, the axial pressure of the bearing 305 arranged on the two balance sleeves 306 and the rotating shaft 301 is consistent, the bearing 305 can be effectively protected, and not only can the noise generated in the rotating process of the rotating shaft 301 be reduced, but also the dynamic balance degree of the rotating shaft 301 is ensured.

In some embodiments, the length of the stator core 201 in the present application is equal to the length of the first magnetic steel 302, so that it can be ensured that the entire first magnetic steel 302 is located inside the stator core 201, and the first magnetic steel 302 can generate a magnetic field with sufficient strength under the action of the stator core 201, thereby ensuring the rotation torque of the rotating shaft 301, and further ensuring the rotation speed and power of the brushless motor.

In some embodiments, there are one or more second magnetic steels 304, and when there are multiple second magnetic steels 304, multiple second magnetic steels 304 are disposed in the fixing base 303 at equal intervals around the through hole;

second magnet steel 304 is the sensor magnet steel, and specific second magnet steel 304 can be hall sensor magnet steel, and the purpose is at rotation axis 301 rotation in-process induction setting first magnet steel 302's on rotation axis 301 rotational speed, and this application does not do specifically to the kind of second magnet steel 304 and prescribes a limit to here.

The specific working principle of the brushless motor provided by the application is as follows:

sequentially embedding a plurality of copper wire packets 202 in embedding grooves on the inner wall of the stator core 201, embedding one copper wire packet 202 in each embedding groove, and then installing the stator core 201 in the motor shell 100; sleeving a first magnetic steel 302 on a rotating shaft 301, sleeving two balance sleeves 306 on two ends of the first magnetic steel 302 on the rotating shaft 301 respectively, and penetrating the rotating shaft 301 sleeved with the first magnetic steel 302 and the balance sleeves 306 through the stator core 201; a plurality of second magnetic steels 304 are arranged in the fixed seat 303 at equal intervals around the through holes formed in the fixed seat, and the fixed seat 303 provided with the second magnetic steels 304 is sleeved on the rotating shaft 301 through the through holes; a plurality of fan blades 403 are arranged between the outer peripheral wall of the inner fixing ring 401 and the inner peripheral wall of the outer fixing ring 402 at equal intervals, the inner fixing ring 401 is sleeved on the rotating shaft 301, and two ends of the rotating shaft 301 are rotatably connected with a bearing mounting space in the motor shell 100 through bearings 305; the plurality of copper wire packets 202 are electrically connected with the control element respectively, the current directions of the plurality of copper wire packets 202 are controlled through the control element, and the stator core 201 and the first magnetic steel 302 and the second magnetic steel 304 on the rotating shaft 301 generate magnetic fields under the action of electric power, so that the rotating shaft 301 is driven to rotate, and the rotation of the brushless motor is realized.

Referring to fig. 7, in a second aspect, the present application provides a bone milling device for orthopedic surgery, comprising a connection member, a bone milling cutter 600 and a high-speed brushless motor according to any one of the above; specifically, the one end of connecting piece can be dismantled and connect in the one end that fixing base 303 was kept away from to axis of rotation 301, and the one end that the axis of rotation 301 was kept away from to the connecting piece is connected and is ground the bone cutter head. Wherein, the bone grinding device for orthopedic surgery that this application provided, the rotation through brushless motor drives the rotation of the bone grinding tool bit of being connected through connecting piece and axis of rotation 301, and then the rotation through grinding the bone grinding tool bit realizes grinding the bone operation in the bone surgery, because brushless motor can still have higher output torque under the limited circumstances in space in a direction, make brushless motor can reach higher output and radiator unit 400 can in time distribute the heat that produces to outside motor housing 100 in the brushless motor operation process under equal rotational speed, the temperature rise in the brushless motor operation process has been reduced, the influence of the heat that significantly reduces to brushless motor, and then can prolong brushless motor's life. The application provides an orthopedic surgery is with grinding bone device not only can reach higher output under the same rotational speed at the in-service use in-process promptly for can produce sufficient grinding bone power in grinding bone surgery, can also make orthopedic surgery in time lose and lose with the heat that grinds bone device.

In some embodiments, the connector herein includes a yoke 500 and a handle; specifically, one end of the shift fork 500 is arranged on the rotating shaft, the other end of the shift fork 500 is clamped with one end of the knife handle, and the other end of the knife handle is provided with a bone grinding knife head. Wherein, the pinhole 501 has been seted up on the shift fork, the round pin axle runs through pinhole 501 and fixes the one end of handle of a knife on shift fork 500, the connection on the handle of a knife can be dismantled to the bone grinding tool bit, it is rotatory that the motor drives the bone grinding tool bit of fixing on the handle of a knife, the handle of a knife can be dismantled with the motor, the different handle of a knife of convenient to use, the connection on the handle of a knife can be dismantled to the bone grinding tool bit, can be convenient for change the bone grinding tool bit, and after orthopedic surgery, can dismantle the bone grinding tool bit from the handle of a knife fast, be convenient for wash the bone grinding tool bit after wasing and accomodate the bone grinding tool bit after wasing, the convenience and the flexibility of the use of bone grinding device for orthopedic surgery have been improved.

The application provides a bone grinding device for bone surgery's concrete theory of operation as follows:

before the beginning of the bone surgery, insert the handle on the motor, make the handle through the rotation axis connection of shifting fork and motor to will grind the bone tool bit and fix the one end at the handle of a knife, open brushless motor, drive the rotation of fixing the 500 of shifting fork on axis of rotation 301 through brushless motor's axis of rotation 301, the rotation of rethread shifting fork 500 drives the handle of a knife and fixes the rotation of grinding the bone tool bit on the handle of a knife, through the grinding operation of the rotation realization bone surgery of grinding the bone tool bit.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A high speed brushless motor, comprising: a motor housing (100), a stator assembly (200), and a rotor assembly (300);

the stator assembly (200) is installed in the motor housing (100), and the stator assembly (200) comprises a cylindrical stator core (201) and a copper wire package (202) arranged on the inner wall of the stator core (201);

the rotor assembly (300) comprises a rotating shaft (301), first magnetic steel (302), a fixed seat (303) and second magnetic steel (304); first magnet steel (302) are fixed on the outer wall on axis of rotation (301), the through-hole has been seted up on fixing base (303), fixing base (303) pass through the through-hole cover is established on axis of rotation (301), second magnet steel (304) set up in fixing base (303), axis of rotation (301) axial runs through stator core (201) and both ends are passed through bearing (305) and are rotated the connection and be in on motor housing (100).

2. A high speed brushless electric machine according to claim 1, further comprising a heat sink assembly (400);

the heat dissipation assembly (400) comprises an inner fixing ring (401), an outer fixing ring (402), a plurality of fan blades (403) and a plurality of heat dissipation holes (101);

interior solid fixed ring (401) cover is established on axis of rotation (301), and is a plurality of the one end of fan blade (403) is equidistant to be set up on the periphery wall of interior solid fixed ring (401), and is a plurality of the other end of fan blade (403) is equidistant to be set up on the internal perisporium of outer solid fixed ring (402), it is a plurality of louvre (101) are evenly seted up on motor housing (100), every louvre (101) are used for with the heat that brushless motor operation process produced discharges to outside motor housing (100), every louvre (101) are last to be provided with the filter screen.

3. The high-speed brushless motor according to claim 1, wherein the plurality of copper wire packets (202) are provided, and the plurality of copper wire packets (202) are respectively provided on an inner wall of the stator core (201);

the stator iron core (201) is made of permalloy.

4. The high speed brushless electric machine of claim 3, further comprising a control member;

the control part is located outside the motor shell (100), and the control part is electrically connected with the plurality of copper wire packages (202) and is used for controlling the current direction of the plurality of copper wire packages (202).

5. The high-speed brushless motor according to claim 1, wherein the first magnetic steel (302) is a magnetic steel sleeve made of a novel strong magnetic rare earth material, and the first magnetic steel (302) is sleeved on the rotating shaft (301).

6. The high-speed brushless motor according to claim 5, wherein a balance sleeve (306) is disposed between each of two ends of the first magnetic steel (302) and the bearing (305), and the balance sleeve (306) is sleeved on the rotating shaft (301).

7. The high-speed brushless electric machine according to claim 5, characterized in that the length of the stator core (201) is equal to the length of the first magnetic steel (302).

8. The high-speed brushless electric machine according to any of claims 1-7, wherein one or more of the second magnetic steels (304) are sensor magnetic steels (304).

9. An osteosynthetic device comprising a connector, a bone milling head (600) and a high-speed brushless motor according to any one of claims 1 to 8;

one end of the connecting piece is detachably connected to one end, far away from the rotating shaft (301), of the fixed seat (303), and one end, far away from the rotating shaft (301), of the connecting piece is connected with the bone grinding cutter head (600).

10. The bone grinding device for orthopedic surgery according to claim 9, characterized in that the connector comprises a fork (500) and a handle;

one end of the shifting fork (500) is arranged on the rotating shaft, the other end of the shifting fork (500) is clamped with one end of the knife handle, and the other end of the knife handle is provided with the bone grinding knife head.