CN217010479U

CN217010479U - Single-rotor single-stator axial magnetic field motor

Info

Publication number: CN217010479U
Application number: CN202220440256.4U
Authority: CN
Inventors: 周劲松
Original assignee: Guangzhou Ningshang Energy Technology Co ltd
Current assignee: Guangzhou Ningshang Energy Technology Co ltd
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-07-19
Anticipated expiration: 2032-03-01

Abstract

The utility model discloses a single-rotor single-stator axial magnetic field motor which comprises a rotor, a stator and a seat body, wherein the seat body is of a cylindrical ring structure with a bottom; the rotor comprises a back iron and magnetic steel, and the magnetic steel is distributed and fixed on one surface of the back iron in an annular manner; the stator comprises an iron core and a winding, the tooth space structure of the iron core is distributed along the radial direction, the yoke part of the iron core is fixed at the bottom in the base body, and the winding is wound on the tooth space structure of the iron core; a single-sided air gap is formed between the magnetic steel and the back iron. The single-rotor single-stator axial magnetic field motor provided by the utility model is thinner in thickness and simple in structure, only a single-side air gap needs to be adjusted, and the installation is more convenient; the number of quantity or the permanent magnet of iron core and winding can be reduced, and the cost is lower, especially is suitable for some and requires thin and light field of weight requirement to motor thickness, if use on unmanned aerial vehicle or special construction's fan.

Description

Single-rotor single-stator axial magnetic field motor

Technical Field

The utility model relates to the technical field of motors, in particular to a single-rotor single-stator axial magnetic field motor.

Background

The existing axial magnetic field motor with permanent magnets is generally in a double-stator single-rotor structure, and a rotor is positioned between two stators; or a double-rotor single-stator structure, wherein the stator is positioned between the two rotors; after the axial magnetic field motors with the two structures are assembled, the whole thickness of the motor is thicker due to the double stators or the double rotors, and the axial magnetic field motor is difficult to be applied to the field with the requirement on the thickness of some motors. The double-stator or double-rotor motor has double-sided air gaps, and in order to ensure the size and uniformity of the air gaps on two sides and the influence of the magnetic force of the permanent magnet, a lot of time is needed for installation and adjustment. The double-stator motor is provided with two iron cores and windings, the double-rotor motor is provided with two back iron and permanent magnet combinations, and the using amount of the permanent magnets is large, so that the double-stator motor or the double-rotor motor is complex in structure and high in cost.

Therefore, there is a need to solve the above technical problems.

Disclosure of Invention

Aiming at the technical problems, the utility model provides the single-rotor single-stator axial magnetic field motor which is thinner in thickness and simple in structure, only needs to adjust a single-side air gap, and is more convenient to install; the quantity that can reduce the quantity of iron core and winding or permanent magnet, the cost is lower, especially is suitable for some and requires the field thin and that weight requires lightly to motor thickness, if use on unmanned aerial vehicle or special construction's fan.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a single-rotor and single-stator axial magnetic field motor comprises a rotor, a stator and a seat body, wherein the seat body is of a cylindrical ring structure with a bottom, the stator is fixed inside the seat body, and the rotor is rotatably fixed at the central position of the seat body;

the rotor comprises back iron and magnetic steel, and the magnetic steel is distributed and fixed on one surface of the back iron in an annular manner;

the stator comprises an iron core and a winding, a tooth space structure of the iron core is distributed along the radial direction, a yoke part of the iron core is fixed at the bottom in the base body, and the winding is wound on the tooth space structure of the iron core;

and a single-side air gap is formed between the magnetic steel and the back iron.

The single-rotor single-stator axial magnetic field motor is thinner in thickness and simple in structure, only a single-side air gap needs to be adjusted, and the installation is more convenient; the usage amount of the iron core and the winding or the number of the permanent magnets can be reduced, and the material cost is reduced.

The base body further comprises an outer cylindrical ring and an inner cylindrical ring which are coaxial, and the outer cylindrical ring and the inner cylindrical ring are connected into a whole through the bottom;

a first bearing and a second bearing are arranged inside the inner cylindrical ring, a positioning step is arranged in the middle of the inside of the inner cylindrical ring, and the outer rings of the first bearing and the second bearing are respectively positioned at two sides of the positioning step;

and a rotating shaft is fixed in the inner rings of the first bearing and the second bearing, and the back iron is fixed at the outer end part of the rotating shaft.

Above-mentioned single rotor list stator axial magnetic field motor, the inner cylinder ring through the pedestal fixes first bearing and second bearing, and the rotor is fixed through the inner circle of rotation axis and two bearings, realizes that the rotor is rotatory for the pedestal, compact structure.

And furthermore, one end of the rotating shaft is provided with a shaft flange which compresses the back iron, the back iron is provided with a protruding structure which is compressed on the inner ring of the first bearing, and the other end of the rotating shaft is connected with and compressed on the inner ring of the second bearing through a fastener. The rotation axis passes through the connection of shaft flange and fastener realization and back iron, simple structure, simple to operate.

And furthermore, an outer cover is arranged on the seat body, and a central opening of the outer cover is exposed out of the back iron. The enclosing cover is fixed on the pedestal, prevents that foreign matters such as dust from getting into inside the motor, and enclosing cover center trompil exposes the back iron and is favorable to scattering the inside heat of motor through the back iron.

Further, the outer cylindrical ring and the bottom of the seat body are provided with a plurality of heat dissipation holes which are vertically connected, and the inner side of the bottom is provided with a plurality of fan-shaped holes. The heat dissipation holes and the fan-shaped holes are favorable for heat dissipation inside the motor.

Further the bottom of pedestal is equipped with a plurality of motor fixed orificess, be equipped with a plurality of load fixed orificess on the back iron. The motor fixing hole fixes the motor, and the load fixing hole is connected with an external load part.

And a first gasket and a second gasket are further arranged on the rotating shaft, the first gasket is positioned between the first bearing and the second bearing inner ring, and the second gasket is positioned between the fastener and the second bearing inner ring. The first gasket and the second gasket are arranged to be beneficial to ensuring that the first bearing and the second bearing cannot axially move in a string manner.

Compared with the prior art, the utility model has the following technical advantages: the single-rotor single-stator axial magnetic field motor is thinner and simple in structure, only a single-side air gap needs to be adjusted, and the installation is more convenient; the usage amount of the iron core and the winding or the number of the permanent magnets can be reduced, the cost is lower, and the permanent magnet motor is particularly suitable for the fields with thin requirements on the thickness and light requirements on the weight of the motor.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an exploded view of FIG. 1;

FIG. 5 is a perspective view of the housing of FIG. 4;

fig. 6 is a perspective view of the core of fig. 4;

fig. 7 is a perspective view of the back iron of fig. 4.

Detailed Description

The utility model will be described in further detail below with reference to embodiments shown in the drawings.

As shown in fig. 1 to 7, an embodiment of a single rotor single stator axial field motor of the present invention.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the single-rotor single-stator axial magnetic field motor includes a rotor 100, a stator 200 and a base 300, wherein the base 300 is a cylindrical ring structure with a bottom 310, the stator 200 is fixed inside the base 300, and the rotor 100 is rotatably fixed at a central position of the base 300.

As shown in fig. 3 and 4, the rotor 100 includes a back iron 110 and a magnetic steel 120, the magnetic steel 120 is composed of a plurality of small fan-shaped blocks, and is fixed on a surface of the back iron 110 in an annular distribution, and the outer surface is in an N-pole and S-pole staggered arrangement. As shown in fig. 7, the magnetic steel fixing surface of the back iron 110 has an annular concave surface 113, and the inner and outer edges of the annular concave surface 113 position both sides of the magnetic steel 120 to ensure the stability of the magnetic steel 120 during high-speed rotation. As shown in fig. 4, the outer surface of the back iron 110 has a plurality of radial grooves, and the radial groove structure can increase the heat dissipation area of the surface of the back iron 110 and reduce the weight of the back iron 110.

As shown in fig. 3 and 4, the stator 200 includes a core 210 and a winding 220. As shown in fig. 6, the slot structures 211 of the core 210 are radially distributed, and the yoke portion 212 of the core 210 is fixed to the bottom portion 310 in the housing 300. As shown in fig. 4, the winding 220 is wound on the slot structure 211 of the core 210.

As shown in fig. 3, a single-sided air gap is formed between the magnetic steel 120 and the back iron 110.

The single-rotor single-stator axial magnetic field motor is thinner in thickness and simple in structure, only a single-side air gap needs to be adjusted, and the installation is more convenient; the usage amount of the iron core and the winding and the number of the permanent magnets can be reduced, and the material cost is reduced.

As shown in FIG. 5, the holder body 300 comprises an outer cylindrical ring 320 and an inner cylindrical ring 330 which are coaxial, and the outer cylindrical ring 320 and the inner cylindrical ring 330 are connected into a whole through the bottom part 310.

As shown in fig. 3, a first bearing 340 and a second bearing 350 are provided inside the inner cylindrical ring 330. As shown in fig. 3 and 5, the inner cylindrical ring 330 has a positioning step 331 at a middle position inside, and two sides of the positioning step 331 respectively position the outer rings of the first bearing 340 and the second bearing 350, and the positioning step 331 does not extend to the inner rings of the two bearings.

As shown in fig. 3, the inner rings of the first bearing 340 and the second bearing 350 fix the rotation shaft 130, and the outer end of the rotation shaft 130 fixes the back iron 110.

Above-mentioned single rotor list stator axial magnetic field motor, the inner cylinder ring through the pedestal fixes first bearing and second bearing, and the rotor passes through the rotation axis to be fixed with the inner circle of two bearings, realizes that the rotor is rotatory for the pedestal, compact structure.

As shown in fig. 4, the rotation shaft 130 has a shaft flange 131 at one end. As shown in fig. 3, the shaft flange 131 presses the back iron 110, and the shaft flange 131 sinks into the back iron 110. As shown in fig. 3 and 7, the back iron 110 has a protrusion 111 pressed against the inner ring of the first bearing 340. Raised structure 111 is tapered to avoid pressing against the outer race of first bearing 340. The other end of the rotary shaft 130 has an internal thread, and the internal thread of the rotary shaft 130 is coupled therein by a fastener 140 such as a bolt pressed against an inner ring of the second bearing 350. The rotation axis passes through the connection of shaft flange and fastener realization and back iron, simple structure, simple to operate.

As shown in fig. 1 and 4, the base 300 is provided with an outer cover 400, and a central opening of the outer cover 400 exposes the back iron 110. The outer cover 400 is fixed on the base 300 to prevent foreign matters such as dust from entering the motor, and the opening at the center of the outer cover 400 exposes the back iron 110, which is beneficial to dissipating heat inside the motor through the back iron 110.

As shown in FIG. 5, the outer cylindrical ring 320 and the bottom 310 of the housing 300 are provided with a plurality of heat dissipating holes 311 vertically connected, and the inner side of the bottom 310 is provided with a plurality of fan-shaped holes 312. The heat dissipation holes and the fan-shaped holes are favorable for heat dissipation inside the motor.

As shown in fig. 5, the bottom 310 of the housing 300 is provided with a plurality of motor fixing holes 313. As shown in fig. 7, the back iron 110 is provided with a plurality of load fixing holes 112. The motor is fixed by the motor fixing hole, and the load fixing hole is connected with an external load part.

As shown in fig. 3 and 4, the rotating shaft 130 is provided with a first spacer 360 and a second spacer 370, the first spacer 360 is located between the first bearing 340 and the inner ring of the second bearing 350, and the second spacer 370 is located between the fastening member 140 and the inner ring of the second bearing 350. The first spacer 360 avoids extending to the outer races of the two bearings and the second spacer 370 avoids extending to the inner race of the second bearing 350. The first gasket and the second gasket are arranged to be beneficial to ensuring that the first bearing and the second bearing cannot axially move in a string manner.

The above-mentioned embodiments are merely provided for convenience of illustration of the present invention and are not intended to be limiting in form; those skilled in the art should understand that they can easily make various changes and modifications to the disclosed embodiments without departing from the scope of the present invention.

Claims

1. A single-rotor single-stator axial magnetic field motor is characterized by comprising a rotor, a stator and a base body, wherein the base body is of a cylindrical ring structure with a bottom, the stator is fixed in the base body, and the rotor is rotatably fixed in the center of the base body;

the stator comprises an iron core and a winding, a tooth space structure of the iron core is distributed along the radial direction, a yoke part of the iron core is fixed at the bottom in the seat body, and the winding is wound on the tooth space structure of the iron core;

2. A single-rotor single-stator axial field electric machine as claimed in claim 1 wherein said housing comprises coaxial outer and inner cylindrical rings, said outer and inner cylindrical rings being integrally connected by said base;

a first bearing and a second bearing are arranged inside the inner cylindrical ring, a positioning step is arranged in the middle of the inner cylindrical ring, and the outer rings of the first bearing and the second bearing are respectively positioned at two sides of the positioning step;

3. The single rotor single stator axial field electric machine of claim 2 wherein said rotating shaft has a shaft flange at one end, said shaft flange pressing against said back iron, said back iron having a raised structure pressing against said inner race of said first bearing, said other end of said rotating shaft being connected to and pressed against said inner race of said second bearing by fasteners.

4. The single rotor single stator axial field electric machine of claim 1 wherein said housing has an outer cover with a central opening exposing said back iron.

5. The single rotor single stator axial field electric machine of claim 2, wherein the outer cylindrical ring and the bottom of the housing are formed with a plurality of vertically connected heat dissipating holes, and the bottom is formed with a plurality of fan-shaped holes inside.

6. The single rotor single stator axial field electric machine of claim 2 wherein said base has a plurality of motor mounting holes in the bottom thereof and said back iron has a plurality of load mounting holes therein.

7. A single rotor, single stator, axial field electric machine as claimed in claim 3 wherein said rotating shaft has a first spacer and a second spacer, said first spacer being positioned between said first bearing and said second bearing inner race, said second spacer being positioned between said fastener and said second bearing inner race.