CN114552839B - High-performance brushless motor - Google Patents
High-performance brushless motor Download PDFInfo
- Publication number
- CN114552839B CN114552839B CN202210098705.6A CN202210098705A CN114552839B CN 114552839 B CN114552839 B CN 114552839B CN 202210098705 A CN202210098705 A CN 202210098705A CN 114552839 B CN114552839 B CN 114552839B
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- rear end
- rotor shaft
- fixed
- end cover
- stator winding
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- 238000004804 winding Methods 0.000 claims abstract description 92
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 12
- 210000001503 joint Anatomy 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 7
- 230000004044 response Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to a high-performance brushless motor, which belongs to the technical field of motors and comprises a machine shell, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are fixed at two ends of the machine shell, a rotor assembly and a stator assembly positioned at the outer side of the machine shell are arranged in the machine shell, the rotor assembly comprises a rotor shaft and magnetic steel fixed on the rotor shaft, the stator assembly comprises a stator iron core and a stator winding positioned at the inner side of the stator iron core, an annular space is formed between an outer ring of the magnetic steel and an inner ring of the stator iron core, and an outlet end of the stator winding is positioned in the annular space and fixedly connected with a connecting part fixed at the inner end of the rear end cover. The invention has the advantages that the outer diameter of the stator winding can be closer to the inner diameter of the stator core, the coil adjusting range can be enlarged, the disassembly and assembly of the coil are convenient, and the adjustable range of the motor performance can be enlarged, so that the performance of the motor can be improved, the process requirement of winding can be reduced, and the like.
Description
Technical Field
The invention relates to a high-performance brushless motor, and belongs to the technical field of motors.
Background
Brushless dc motors are widely used in various fields as a small-sized high-efficiency motor. Because the internal size of the motor has a fixed value after the power of the motor is set, how to save the internal space of the motor, fully utilize the space of the whole machine, ensure the high performance of the motor on the premise of not changing the power of the motor, and still the technical problem to be solved is urgent. At present, a stator winding in a motor is fixed on an inner ring of a stator core through glue adhesion, so that glue needs to be coated on contact surfaces between the stator core and the stator winding during assembly, a certain gap exists between the assembled stator core and the stator winding, and a part of internal space of the motor is occupied, so that the size of the stator winding is limited, the adjustment range of a coil and the adjustable range of the motor performance are reduced, the performance of the motor is influenced, and the technological requirement of winding is also higher due to the reduction of the space.
Disclosure of Invention
The invention aims to provide a high-performance brushless motor, which solves the problems that in the prior art, a certain gap exists between an assembled stator core and a stator winding, and a part of the internal space of the motor is occupied, so that the size of the stator winding is limited, the adjustment range of a coil and the adjustable range of the motor performance are reduced, the performance of the motor is influenced, the space is reduced, the process requirement of winding is higher, and the like.
The technical aim of the invention is mainly solved by the following technical scheme: the utility model provides a high performance brushless motor, includes the casing and is fixed in front end housing and the rear end cap at casing both ends, be equipped with the rotor assembly in the casing and be located its outside stator assembly, the rotor assembly include the rotor shaft with be fixed in magnet steel on the rotor shaft, the stator assembly is including being fixed in the stator core of casing inner wall and being located its inboard stator winding, the magnet steel outer lane with be formed with the annular space between the stator core inner circle, stator winding is located in the annular space and its outlet terminal forms fixed connection with the connecting portion that is fixed in the rear end cap is inner.
According to the device, the wire outlet end of the stator winding is fixedly connected with the connecting part at the inner end of the rear end cover, so that the outer diameter of the stator winding can be closer to the inner diameter of the stator core until the outer ring of the stator winding is attached to the inner ring of the stator core, the space utilization rate of the annular space is higher, more coils can be wound in the stator winding under the condition that the internal size of the motor is fixed, the adjusting range of the coils can be enlarged, the adjustable range of the motor performance can be enlarged, the performance of the motor can be improved, and the process requirements of winding can be reduced.
Preferably, the connecting part comprises a connecting sleeve concentrically fixed at the inner end of the rear end cover and in a ring shape, one end of the connecting sleeve, which faces the stator winding, is provided with a connecting groove with an opening at the end and in a ring shape, and the outlet end of the stator winding extends into the connecting groove and is fixed with the connecting groove through glue.
Through be equipped with concentric being fixed in rear end cap body inner and be the adapter sleeve of ring form in connecting portion, the adapter sleeve is formed with this end opening and is the spread groove of ring form towards stator winding's one end, stator winding's wire end stretches into the spread groove and is fixed through glue with it for stator winding's wire end can be fixed through glue bonding with the inner wall of spread groove, only need stretch into the spread groove with stator winding's wire end earlier during the assembly, then with glue injection spread groove, can realize after the glue solidifies that the connection between stator winding and the connecting portion of rear end cap inner is fixed, assembly process is simple and convenient easy control, and the installation is dismantled conveniently, simultaneously still be convenient together with motor other parts assembly, in addition can also better installation and fixed stator winding's end of a thread.
Preferably, the inner diameter of the connecting slot is matched with the inner diameter of the stator winding, and the outer diameter of the connecting slot is larger than the outer diameter of the stator winding.
Through setting the internal diameter of spread groove to the internal diameter looks adaptation with stator winding, the external diameter of spread groove is greater than stator winding's external diameter for stator winding's wire outlet end stretches into the spread groove and with it through glue with fixed back, stator winding axis and spread groove axis's overlap ratio is higher, thereby make stator winding axis and stator core, magnet steel axis's overlap ratio higher, so that guarantee stator winding's performance, in addition make stator winding's wire outlet end stretch into after the spread groove and still have certain clearance between the spread groove outer lane, so that glue fills this clearance and fixes, simultaneously make the outer lane of spread groove can not restrict stator winding's size, so that stator winding's external diameter can more be close stator core's internal diameter.
Preferably, the connecting sleeve is made of plastic, and the front end cover and the rear end cover are made of aluminum.
Through setting up the adapter sleeve to by plastics, front end housing and rear end cap are made by aluminium for stator winding can not with rear end cap direct contact, can prevent to puncture, and the dimensional accuracy of metallic front end housing and rear end cap is guaranteed more easily, in order to realize rotor shaft and front end housing, rear end cap's centering.
Preferably, the outer end of the rear end cover is fixed with a cover with a hollow interior and an open inner end, the rear end of the rotor shaft sequentially penetrates through the connecting sleeve and the inner hole of the rear end cover to extend into the cover and is fixed with an induction magnetic ring through a shaft sleeve, the shaft sleeve is movably sleeved on the rotor shaft, the induction magnetic ring is tightly fixed on the shaft sleeve, a first concave step surface is formed on the part, located in the cover, of the rotor shaft, the axial inner end of the shaft sleeve is abutted with the first step surface, a fastening screw is arranged at the rear end of the rotor shaft in a penetrating manner along the axial threads of the rotor shaft, and the inner end of the head of the fastening screw is abutted with the axial outer end of the shaft sleeve.
Through be fixed with inside cavity and inner open-ended cover at the rear end cover outer end, rotor shaft rear end passes the hole of adapter sleeve and rear end cover in proper order and extends to in the cover and be fixed with the response magnetic ring through the axle sleeve, the axle sleeve movable sleeve is located on the rotor shaft, the response magnetic ring close-fitting is fixed in on the axle sleeve, the part that the rotor shaft is located the cover is formed with the first step face of indent, the axial inner and the first step face butt of axle sleeve, the rotor shaft rear end wears to be equipped with fastening screw along its axial screw thread, fastening screw's the head inner and the axial outer end butt of axle sleeve, make first step face and fastening screw's the head inner can carry out spacing in order to realize the fixed of axle sleeve to the axial both ends of axle sleeve, thereby can fix the response magnetic ring on the rotor shaft through the axle sleeve, and can break away from the butt with the axial outer end of axle sleeve when fastening screw unscrews, so as to loosen the fixed action to the axle sleeve, make the axle sleeve can rotate along the rotor shaft, thereby make the orientation of response magnetic ring can adjust, in order to adjust the magnetic pole direction of response magnetic ring.
Preferably, a distance between the first step surface and the rear end of the rotor shaft is smaller than an axial length of the sleeve.
The distance between the first step surface and the rear end of the rotor shaft is set to be smaller than the axial length of the shaft sleeve, so that the inner end of the head of the fastening screw can be abutted with the outer end of the shaft sleeve in the axial direction, and the limiting and fixing of the shaft sleeve are realized.
Preferably, a fourth step surface which is in butt joint with the outer end of the induction magnetic ring and protrudes outwards is formed on one side of the axial outer end of the shaft sleeve.
The fourth step surface which is abutted with the outer end of the induction magnetic ring and protrudes outwards is formed on one side of the axial outer end of the shaft sleeve, so that the fourth step surface can limit the induction magnetic ring when the induction magnetic ring is tightly matched with the shaft sleeve, and the assembly is convenient.
Preferably, the outer end of the rear end cover is fixed with a hall plate positioned at the outer side of the induction magnetic ring, wire outlet holes for the leads of the stator winding to pass through are arranged between the stator winding and the hall plate so that the leads of the stator winding are connected with the hall plate, the wire outlet holes extend from the bottom of the connecting groove to the outer end of the rear end cover, and the number of the wire outlet holes is three and distributed in a circular array.
Through being fixed with the hall plate that is located the response magnetic ring outside at the rear end cover outer end, be equipped with the wire outlet that the lead wire of supply stator winding passed between stator winding and the hall plate so that stator winding's lead wire links to each other with the hall plate, the wire outlet extends to the outer end of rear end cover from the tank bottom of spread groove, the quantity of wire outlet is three and is circular array distribution, make stator winding fixed back its lead wire of leading-out end can get into in the cover through the wire outlet directly and put through with the hall plate, it is convenient to walk the line, and the department of being qualified for next round of competitions need not to increase mechanical structure and protect, motor inner structure has been simplified, make in addition stator winding's lead wire can carry out triangle-shaped connection and star-shaped convenient switching of connection behind the access hall plate.
Preferably, bearings for rotatably supporting the rotor shaft are respectively fixed in the front end cover and the rear end cover, the front end and the rear end of the rotor shaft respectively penetrate through corresponding inner holes of the bearings and form fixed connection with the bearings, the bearings in the rear end cover are positioned on one side of the outer ends of the bearings and are positioned on the outer sides of the connecting sleeves, a second step surface which is in butt joint with the axial inner ends of the bearings in the front end cover and is concave is formed on the rotor shaft, a third step surface which is positioned on the axial inner sides of the bearings in the rear end cover and is concave is also formed on the rotor shaft, springs are sleeved on the rotor shaft and positioned between the third step surface and the bearings in the rear end cover, and two ends of each spring are respectively in butt joint with the axial inner ends of the third step surface and the bearings.
Through be fixed with the bearing that is used for rotatory support rotor shaft in front end housing and rear end housing respectively, both ends pass the hole of corresponding bearing respectively and form fixed connection with it, the bearing in the rear end housing is located its outer end one side and is located the adapter sleeve outside, be formed with on the rotor shaft with the bearing in the front end housing axial inner butt and indent second step face, still be formed with on the rotor shaft and be located the bearing axial inboard and indent third step face in the rear end housing, the cover is equipped with the spring that is located between third step face and the bearing that is located the rear end housing on the rotor shaft, spring both ends respectively with third step face, the axial inner butt of this bearing, make through the adapter sleeve can increase the distance between bearing in the rear end housing and the bearing, can reduce because the risk that magnet steel magnetism is too strong influences the bearing, in order to guarantee that the motor operates smoothly, two bearings can block the both ends of rotor shaft simultaneously, in order to realize spacing the axial of rotor shaft, and carry out spacing through the mode of one end rigid butt one end elasticity, the limited effect is better, can effectively prevent that the axial float when the rotor shaft from taking place the magnet steel to move.
Preferably, two balancing weights respectively positioned at two sides of the axial direction of the magnetic steel are fixed on the rotor shaft.
Through being fixed with two balancing weights that are located the magnet steel axial both sides respectively on the rotor shaft, can increase balanced space, make the rotor shaft keep balanced at the maximum in-process of operation to improve the stationarity of motor operation.
Therefore, the invention has the advantages that the outer diameter of the stator winding can be more close to the inner diameter of the stator core until the outer ring of the stator winding is attached to the inner ring of the stator core, so that the space utilization rate of the annular space is larger, more coils can be wound in the stator winding under the condition that the internal size of the motor is fixed, the adjustment range of the coils can be enlarged, the disassembly and assembly of the coils are convenient, the adjustable range of the motor performance can be enlarged, the performance of the motor can be improved, the process requirements of winding can be reduced, and the like.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
Fig. 3 is an enlarged schematic view of the structure of fig. 2a according to the present invention.
The index marks in the drawings are as follows: 1. a housing; 2. a front end cover; 3. a rear end cover; 4. a rotor assembly; 5. a stator assembly; 6. a rotor shaft; 7. magnetic steel; 8. a stator core; 9. a stator winding; 10. an annular space; 11. a connection part; 12. connecting sleeves; 13. a connecting groove; 14. a cover; 15. a shaft sleeve; 16. a magnetic ring is induced; 17. a first step surface; 18. a fastening screw; 19. a fourth step surface; 20. a Hall plate; 21. a wire outlet hole; 22. a bearing; 23. a second step surface; 24. a third step surface; 25. a spring; 26. and a balance weight.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings.
As shown in figure 1, the high-performance brushless motor comprises a machine shell 1, a front end cover 2 and a rear end cover 3 which are fixed at two ends of the machine shell 1, wherein the machine shell 1 is fixedly connected with the front end cover 2 and the rear end cover 3 through screws, the front end cover 2 and the rear end cover 3 are both made of aluminum, a rotor assembly 4 and a stator assembly 5 positioned at the outer side of the rotor assembly are arranged in the machine shell 1, the rotor assembly 4 comprises a rotor shaft 6 and a magnetic steel 7 fixed on the rotor shaft 6, two balance weights 26 respectively positioned at two axial sides of the magnetic steel 7 are fixed on the rotor shaft 6, the stator assembly 5 comprises a stator iron core 8 fixed on the inner wall of the machine shell 1 and a stator winding 9 positioned at the inner side of the stator iron core, a gap is formed between the inner ring of the stator winding 9 and the outer ring of the magnetic steel 7, the outer ring of the stator winding 9 is in insulating fit with the inner ring of the stator iron core 8, an annular space 10 is formed between the outer ring of the magnetic steel 7 and the inner ring of the stator core 8, the stator winding 9 is positioned in the annular space 10, the wire outlet end of the stator winding 9 is fixedly connected with a connecting part 11 fixed at the inner end of the rear end cover 3, the non-wire outlet end of the stator winding 9 is positioned in the annular space 10, the connecting part 11 comprises a connecting sleeve 12 concentrically fixed at the inner end of the rear end cover 3 and in a circular ring shape, the connecting sleeve 12 is made of plastic, a connecting groove 13 with an opening at the end and in a circular ring shape is formed at one end of the connecting sleeve 12 facing the stator winding 9, the wire outlet end of the stator winding 9 extends into the connecting groove 13 and is fixed with the connecting groove through glue, the inner diameter of the connecting groove 13 is matched with the inner diameter of the stator winding 9, the outer diameter of the connecting groove 13 is larger than the outer diameter of the stator winding 9, and the outer diameter of the connecting groove 13 is larger than the inner diameter of the stator core 8.
As shown in fig. 2 and 3, the outer end of the rear end cover 3 is fixed with a cover 14 with a hollow interior and an open inner end, the cover 14 is fixed with the rear end cover 3 in a tight fit manner, the rear end of the rotor shaft 6 sequentially passes through the connecting sleeve 12 and the inner hole of the rear end cover 3 to extend into the cover 14 and is fixed with an induction magnetic ring 16 through a shaft sleeve 15, the shaft sleeve 15 is movably sleeved on the rotor shaft 6, the induction magnetic ring 16 is tightly fixed on the shaft sleeve 15, one side of the axial outer end of the shaft sleeve 15 is formed with a fourth step surface 19 which is abutted with the outer end of the induction magnetic ring 16 and protrudes outwards, the fourth step surface 19 is an annular end surface, the part of the rotor shaft 6 positioned in the cover 14 is formed with a first step surface 17 which is concave inwards, the first step surface 17 is an annular end surface, the axial inner end of the shaft sleeve 15 is abutted with the first step surface 17, the distance between the first step surface 17 and the rear end of the rotor shaft 6 is smaller than the axial length of the shaft sleeve 15, the rear end of the rotor shaft 6 is provided with a fastening screw 18 in a penetrating mode along the axial threads of the rear end of the rotor shaft, the inner end of the head of the fastening screw 18 is abutted with the axial outer end of the shaft sleeve 15, the outer end of the rear end cover 3 is fixedly provided with a Hall plate 20 positioned on the outer side of the induction magnetic ring 16, the Hall plate 20 is fixedly arranged on the outer end of the rear end cover 3 through a stud, a wire outlet 21 through which a lead wire of the stator winding 9 passes is arranged between the stator winding 9 and the Hall plate 20 so that the lead wire of the stator winding 9 is connected with the Hall plate 20, the wire outlet 21 extends from the bottom of the connecting groove 13 to the outer end of the rear end cover 3, and the number of the wire outlet 21 is three and is distributed in a circular array.
As shown in fig. 2, the front end cover 2 and the rear end cover 3 are respectively fixed with bearings 22 for rotatably supporting the rotor shaft 6, the bearings 22 are fixed with the front end cover 2 and the rear end cover 3 in a tight fit manner, the front end and the rear end of the rotor shaft 6 respectively pass through inner holes of the corresponding bearings 22 and form fixed connection with the bearings, the rotor shaft 6 is fixed with the inner holes of the bearings 22 in a transition fit manner, a second step surface 23 which is in contact with the axial inner end of the bearings 22 in the front end cover 2 and is concave is formed on the rotor shaft 6, the second step surface 23 is an annular end surface, a third step surface 24 which is in contact with the axial inner side of the bearings 22 in the rear end cover 3 and is concave is also formed on the rotor shaft 6, a spring 25 which is positioned between the third step surface 24 and the bearings 22 in the rear end cover 3 is sleeved on the rotor shaft 6, and the two ends of the spring 25 are respectively in contact with the third step surface 24 and the axial inner end of the bearings 22.
When the embodiment is specifically implemented, during assembly, firstly, the wire outlet end of the stator winding 9 stretches into the connecting groove 13 until the wire outlet end of the stator winding 9 contacts with the groove bottom of the connecting groove 13, meanwhile, the lead wire of the stator winding 9 passes through the wire outlet hole 21 and then glue is injected into the connecting groove 13, after the glue is solidified, the connection and fixation of the stator winding 9 and the inner end connecting part 11 of the rear end cover 3 can be realized, after the fixation, the rear end cover 3 is assembled at the rear end of the shell 1, meanwhile, the stator winding 9 stretches into the annular space 10, the fixed installation of the stator winding 9 can be completed, the outer diameter of the assembled stator winding 9 can be closer to the inner diameter of the stator core 8 until the outer ring of the stator winding 9 is attached to the inner ring of the stator core 8, the space utilization rate of the annular space 10 is higher, more coils can be wound in the stator winding 9 under the condition that the inner size of the motor is fixed, the range of the coil adjustment can be enlarged, meanwhile, the adjustable range of the motor performance can be enlarged, the process requirement of winding can be reduced, in addition, the axial limiting and the limiting of the rotor shaft 6 can be realized by the two bearings 22 and the front end cover 2 and the rear end cover 3.
The invention has the advantages that the outer diameter of the stator winding can be more close to the inner diameter of the stator core until the outer ring of the stator winding is attached to the inner ring of the stator core, so that the space utilization rate of the annular space is larger, more coils can be wound in the stator winding under the condition that the internal size of the motor is fixed, the adjustment range of the coils can be enlarged, the disassembly and assembly of the coils are convenient, the adjustable range of the motor can be enlarged, the performance of the motor can be improved, the process requirements of winding can be reduced, and the like.
Claims (9)
1. A high performance brushless motor, characterized by: the novel motor rotor comprises a machine shell (1) and a front end cover (2) and a rear end cover (3) which are fixed at two ends of the machine shell (1), wherein a rotor assembly (4) and a stator assembly (5) positioned at the outer side of the rotor assembly are arranged in the machine shell (1), the rotor assembly (4) comprises a rotor shaft (6) and magnetic steel (7) fixed on the rotor shaft (6), the stator assembly (5) comprises a stator iron core (8) fixed on the inner wall of the machine shell (1) and a stator winding (9) positioned at the inner side of the stator iron core, an annular space (10) is formed between the outer ring of the magnetic steel (7) and the inner ring of the stator iron core (8), and the stator winding (9) is positioned in the annular space (10) and the outlet end of the stator winding is fixedly connected with a connecting part (11) fixed at the inner end of the rear end cover (3); the connecting part (11) comprises a connecting sleeve (12) which is concentrically fixed at the inner end of the rear end cover (3) and is in a circular ring shape, one end of the connecting sleeve (12) facing the stator winding (9) is provided with a connecting groove (13) which is open at the end and is in a circular ring shape, the outlet end of the stator winding (9) stretches into the connecting groove (13) and is fixed with the outlet end of the stator winding through glue, the rear end cover (3) is assembled at the rear end of the machine shell 1 after being fixed, and meanwhile, the stator winding (9) stretches into the annular space (10), so that the fixed installation of the stator winding (9) can be completed.
2. The high performance brushless motor of claim 1, wherein: the inner diameter of the connecting groove (13) is matched with the inner diameter of the stator winding (9), and the outer diameter of the connecting groove (13) is larger than the outer diameter of the stator winding (9).
3. The high performance brushless motor of claim 2, wherein: the connecting sleeve (12) is made of plastic, and the front end cover (2) and the rear end cover (3) are both made of aluminum.
4. A high performance brushless motor according to claim 1 or 2, wherein: the novel rotor shaft comprises a rotor shaft body and is characterized in that a cover (14) with a hollow inside and an open inner end is fixed at the outer end of the rear end cover (3), the rear end of the rotor shaft (6) sequentially penetrates through a connecting sleeve (12) and an inner hole of the rear end cover (3) to extend into the cover (14), an induction magnetic ring (16) is fixed in the cover (14) through a shaft sleeve (15), the rotor shaft (6) is movably sleeved on the rotor shaft (6), the induction magnetic ring (16) is tightly fixed on the shaft sleeve (15), a first concave step surface (17) is formed on the part of the rotor shaft (6) located in the cover (14), the axial inner end of the shaft sleeve (15) is in butt joint with the first step surface (17), a fastening screw (18) is arranged at the rear end of the rotor shaft (6) in a penetrating mode along the axial thread of the rotor shaft, and the inner end of the head of the fastening screw (18) is in butt joint with the axial outer end of the shaft sleeve (15).
5. The high performance brushless motor of claim 4, wherein: the distance between the first step surface (17) and the rear end of the rotor shaft (6) is smaller than the axial length of the shaft sleeve (15).
6. The high performance brushless motor of claim 4, wherein: a fourth step surface (19) which is in butt joint with the outer end of the induction magnetic ring (16) and protrudes outwards is formed on one side of the axial outer end of the shaft sleeve (15).
7. The high performance brushless motor of claim 4, wherein: the outer end of the rear end cover (3) is fixedly provided with a Hall plate (20) positioned at the outer side of the induction magnetic ring (16), wire outlet holes (21) for the leads of the stator windings (9) to pass through are arranged between the stator windings (9) and the Hall plate (20) so that the leads of the stator windings (9) are connected with the Hall plate (20), the wire outlet holes (21) extend from the bottom of the connecting groove (13) to the outer end of the rear end cover (3), and the number of the wire outlet holes (21) is three and distributed in a circular array.
8. The high performance brushless motor of claim 2, wherein: the novel rotor structure is characterized in that bearings (22) used for rotatably supporting the rotor shaft (6) are respectively fixed on the front end cover (2) and the rear end cover (3), the front end and the rear end of the rotor shaft (6) respectively penetrate through corresponding inner holes of the bearings (22) and form fixed connection with the bearings, the bearings (22) in the rear end cover (3) are located on one side of the outer ends of the bearings and located on the outer sides of the connecting sleeves (12), second step surfaces (23) which are in butt joint with the inner ends of the bearings (22) in the front end cover (2) in an inward manner are formed on the rotor shaft (6), third step surfaces (24) which are located on the inner sides of the bearings (22) in the rear end cover (3) in an axial manner are formed on the rotor shaft (6), springs (25) located between the third step surfaces (24) and the bearings (22) in the rear end cover (3), and the two ends of each spring (25) are in butt joint with the third step surfaces (24) and the inner ends of the bearings (22) in an axial manner.
9. A high performance brushless motor according to claim 1 or 2, wherein: two balancing weights (26) which are respectively positioned at two axial sides of the magnetic steel (7) are fixed on the rotor shaft (6).
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| CN202210098705.6A CN114552839B (en) | 2022-01-27 | 2022-01-27 | High-performance brushless motor |
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| CN114552839A (en) | 2022-05-27 |
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