WO2023125383A1

WO2023125383A1 - Electric motor

Info

Publication number: WO2023125383A1
Application number: PCT/CN2022/141838
Authority: WO
Inventors: 江龙顺; 王洪林
Original assignee: 广东美的白色家电技术创新中心有限公司; 美的集团股份有限公司
Priority date: 2021-12-29
Filing date: 2022-12-26
Publication date: 2023-07-06
Also published as: CN114257059A

Abstract

Disclosed herein is an electric motor. The electric motor comprises: an electric motor shell (10), an electric motor shaft (20), an electric motor stator (30), an electric motor rotor (40) and a magnetic gear low-speed rotor (50). The electric motor shaft (20), the electric motor stator (30), the electric motor rotor (40) and the magnetic gear low-speed rotor (50) are all arranged in the electric motor shell (10). The electric motor stator (30), the electric motor rotor (40) and the magnetic gear low-speed rotor (50) are arranged in an axial direction of the electric motor shaft (20) and are sleeved on the electric motor shaft (20), and the electric motor rotor (40) is located between the electric motor stator (30) and the magnetic gear low-speed rotor (50).

Description

motor

Cross References to Related Applications

This application claims priority to a Chinese patent application with application number 202111635027.4 and titled "Motor" filed on December 29, 2021, the entire contents of which are hereby incorporated by reference.

technical field

The present disclosure relates to the technical field of drive equipment, in particular to a motor.

Background technique

Magnetic gear has the advantages of low noise, high efficiency, easy maintenance and high reliability, etc. It can be used to replace mechanical gears, and can realize low-speed and high-torque operation in direct drive systems. Therefore, magnetic gear composite motor technology has been widely used in recent years. focus on.

The magnetic gear compound motor combines the motor and the concentric magnetic gear with a groove structure. The motor and the magnetic gear have a radial magnetic flux structure, but its motor torque and power density are low.

Contents of the invention

The present disclosure provides a motor, and the technical problem of low motor torque and power density of a magnetic gear compound motor is solved by utilizing one or more embodiments of the present disclosure.

In one aspect of the present disclosure, a motor is provided, which may include: a motor casing, a motor shaft, a motor stator, a motor rotor, and a magnetic gear low-speed rotor; the motor shaft, the motor stator, the motor rotor, and the The magnetic gear low-speed rotors are all arranged in the motor housing; the motor stator, the motor rotor and the magnetic gear low-speed rotor are arranged along the axial direction of the motor shaft and sleeved on the motor shaft , the motor rotor is located between the motor stator and the magnetic gear low-speed rotor.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Apparently, the drawings in the following description are some embodiments of the present disclosure. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 shows a schematic structural diagram of a motor according to some embodiments of the present disclosure;

Figure 2 shows an exploded view of the motor in Figure 1;

Fig. 3 shows the schematic diagram of the motor stator structure of the motor in Fig. 1;

Fig. 4 shows the schematic diagram of the motor rotor structure of the motor in Fig. 1;

Fig. 5 shows the schematic structural view of the magnetic gear low-speed rotor of the motor in Fig. 1;

FIG. 6 shows a schematic structural view of the magnetic gear fixing seat of the motor in FIG. 1 .

Among the reference signs:

10: Motor housing; 101: Housing; 102: Magnetic gear holder; 1021: Flange end cover; 1022: Second magnetic steel; 1023: Fourth through hole; 1024: Positioning groove; 103: Fourth bearing; 104: first limiter; 105: second limiter; 20: motor shaft 2; 30: motor stator; 301: wire frame; 302: stator core; 303: first through hole; 304: winding; 40: Motor rotor; 401: rotor core; 402: first magnetic steel; 403: protective cover; 50: magnetic gear low-speed rotor; 501: magnetic gear low-speed rotor core; 502: magnetic adjustment ring core; 503: third through hole; 504 : the third bearing; 505: the magnet ring bushing; 60: the output shaft; 601: the first bearing; 602: the accommodation cavity; 603: the second bearing.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only part of the embodiments of the present disclosure, not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

It should be noted that all directional indications in the embodiments of the present disclosure are only used to explain the relative positional relationship and movement conditions among the components in a specific posture. If the specific posture changes, the directional indication also changed accordingly.

In addition, descriptions such as "first", "second" and so on in the present disclosure are used for description purposes only, and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , and are not within the scope of protection required by the present disclosure.

The present disclosure is described below with reference to specific embodiments with reference to the accompanying drawings.

In one aspect of the present disclosure, a motor is provided, and the technical problem of low motor torque and power density of a magnetic gear compound motor is solved by utilizing one or more embodiments of the present disclosure.

Fig. 1 shows a schematic structural diagram of a motor according to some embodiments of the present disclosure, and Fig. 2 shows an exploded view of the motor in Fig. 1 . Referring to FIG. 1 and FIG. 2 , the motor of this embodiment includes: a motor housing 10 , a motor shaft 20 , a motor stator 30 , a motor rotor 40 and a magnetic gear low-speed rotor 50 . The motor shaft 20 , the motor stator 30 , the motor rotor 40 and the magnetic gear low-speed rotor 50 are all arranged in the motor casing 10 . The motor stator 30 , the motor rotor 40 and the magnetic gear low-speed rotor 50 are arranged along the axial direction of the motor shaft 20 and sleeved on the motor shaft 20 . The motor rotor 40 is located between the motor stator 30 and the magnetic gear low-speed rotor 50 .

In some embodiments, the present disclosure sets the motor shaft 20, the motor stator 30, the motor rotor 40 and the magnetic gear low-speed rotor 50 in the motor casing 10, so that the motor stator 30 is turned on to generate a rotating magnetic field, and the motor rotor 40 rotates, and the motor rotor 40 drives the magnetic gear low-speed rotor 50 to generate low-speed high-torque to drive external equipment. The motor stator 30 and the motor rotor 40 can form a motor magnetic flux closed path, and the motor rotor 40 and the magnetic gear low-speed rotor 50 and the end face of the motor housing 10 toward the magnetic gear low-speed rotor 50 form a magnetic gear magnetic flux closed path, therefore, the motor rotor 40 can also be used as a magnetic gear high-speed rotor, and the magnetic gear low-speed rotor 50 can also be used as a magnetic gear magnetic adjustment ring, no need Separately set the magnetic gear high-speed rotor and the magnetic gear magnetic adjustment ring to save cost, save space, and facilitate layout. Since the motor stator 30, the motor rotor 40 and the magnetic gear low-speed rotor 50 are arranged along the axial direction of the motor shaft 20, and are sleeved on the On the motor shaft 20, the motor rotor 40 is located between the motor stator 30 and the magnetic gear low-speed rotor 50, so the magnetic steel can be arranged on the motor rotor 40 and the magnetic gear low-speed rotor 50 to form an axial magnetic flux structure. When applied to In a flat space or application scenario, compared with setting the magnetic steel on the peripheral surface of the motor rotor 40 and the magnetic gear, the present disclosure can set more pole pairs. Under the same size condition, the power and rotation speed of the present disclosure The moment density is high, and under the same power and torque density requirements, the volume of the present disclosure is small and the weight is low. Moreover, the poles of the motor rotor 40 and the magnetic gear low-speed rotor 50 of the present disclosure can be adjusted according to the performance requirements of the motor. The logarithm makes the pole logarithm of the motor rotor 40 and the magnetic gear low-speed rotor 50 different, and the power and torque density are high, ensuring that the performance of the motor can be fully exerted.

In some embodiments, the motor shaft 20 is connected with the motor rotor 40 to support the motor rotor 40 to rotate smoothly in the motor housing 10 . The motor shaft 20 is not connected to the motor stator 30 , that is, there is a gap between the motor shaft 20 and the motor stator 30 , so as to prevent the motor stator 30 from interfering with the movement of the motor shaft 20 . The motor shaft 20 is rotatably disposed in the magnetic gear low-speed rotor 50 , and the actions of the two do not interfere with each other.

In some embodiments, the motor shaft 20 , the motor stator 30 , the motor rotor 40 and the magnetic gear low-speed rotor 50 are coaxial to ensure smooth power output.

Fig. 5 shows a schematic structural view of the magnetic gear low-speed rotor of the motor in Fig. 1 . Referring to FIG. 1 , FIG. 2 and FIG. 5 , in some embodiments, in order to output the low-speed high-torque generated by the magnetic gear low-speed rotor 50 , the motor further includes: an output shaft 60 . The output shaft 60 is connected with the magnetic gear low-speed rotor 50 . That is, the output shaft 60 is disposed on the end surface of the magnetic gear low-speed rotor 50 facing away from the motor rotor 40 , and is rotatably passed through the motor housing 10 . In this embodiment, a first bearing 601 is provided between the output shaft 60 and the motor housing 10. The output shaft 60 can rotate smoothly at the motor housing 10 through the first bearing 601, and the magnetic gear low-speed rotor 50 can be generated The low-speed high-torque is transmitted to the external equipment.

In some embodiments, when the magnetic gear low-speed rotor 50 rotates, the magnetic gear low-speed rotor 50 drives the output shaft 60 to rotate at the motor housing 10, and then the output shaft 60 transmits the low-speed high torque generated by the magnetic gear low-speed rotor 50 to The external device is used to drive the action of the external device.

Referring to FIG. 1 , in some embodiments, in order to support the motor shaft 20 , an accommodation cavity 602 is opened in the output shaft 60 , and the end of the motor shaft 20 is rotatably disposed in the accommodation cavity 602 , that is, the motor shaft 20 deviates from The end of the motor stator 30 is rotatably disposed in the accommodating cavity 602 , and the end of the motor shaft 20 can be accommodated through the accommodating cavity 602 to support the motor shaft 20 . In this embodiment, the end of the motor shaft 20 away from the motor stator 30 can be arranged in the housing cavity 602 through the second bearing 603, so as to ensure that the motor shaft 20 can rotate smoothly, and at the same time, the rotation of the motor shaft 20 is consistent with the output shaft 60 The rotation does not interfere with each other to ensure the normal operation of the equipment.

FIG. 3 shows a schematic structural diagram of the motor stator of the motor in FIG. 1 . Referring to FIG. 3 , in some embodiments, the motor stator 30 includes: a wire frame 301 and a plurality of stator cores 302 . The wire frame 301 is arranged in the motor casing 10 and is sleeved on the motor shaft 20, the wire frame 301 is protected by the motor casing 10, and the middle part of the wire frame 301 is provided with a first through hole 303, which is convenient for the motor shaft 20 to pass through At the same time, the diameter of the first through hole 303 is greater than the diameter of the motor shaft 20, so as to prevent the wire frame 301 from interfering with the rotation of the motor shaft 20, so that the motor shaft 20 can rotate normally, so as to ensure the normal rotation of the motor rotor 40. A plurality of stator cores 302 are arranged in the wire frame 301, and the stator cores 302 are supported by the wire frame 301. At the same time, a plurality of stator cores 302 are arranged in the wire frame 301 at equiangular intervals to ensure that the arrangement meets the requirements. Each stator core 302 is provided with a winding 304 , the winding 304 is supported by the stator core 302 , and the winding 304 is conducted to generate a rotating magnetic field, thereby driving the motor rotor 40 to rotate.

Referring to FIG. 3 , in some embodiments, in order to facilitate layout, the radial cross-sectional shape of the stator core 302 is an isosceles trapezoidal shape, and the axial cross-sectional shape of the stator core 302 is an I-shaped shape. At the same time, the manufacturing cost of the stator core 302 can be reduced. , easy to manufacture.

FIG. 4 shows a schematic structural diagram of the motor rotor of the motor in FIG. 1 . Referring to FIG. 4 , in some embodiments, in order to improve the magnetism gathering effect, the motor rotor 40 is a magnetism gathering spoke structure.

Referring to FIG. 4 , in some embodiments, the motor rotor 40 includes: a rotor core 401 and a plurality of first magnetic steels 402 . The rotor core 401 is arranged in the motor casing 10 and connected to the motor shaft 20 , the rotor core 401 is protected by the motor casing 10 , and the rotor core 401 is supported by the motor shaft 20 . In this embodiment, a second through hole is opened in the middle of the rotor core 401 , and the motor shaft 20 is embedded in the second through hole, so that the rotor core 401 and the motor shaft 20 are fixedly connected. The axial end surface of the rotor core 401 is provided with a plurality of first mounting grooves, and a plurality of first magnetic steels 402 are respectively arranged in the corresponding first mounting grooves and are radially magnetized. Every two adjacent first magnetic steels 402 The polarity of the first magnetic steel 402 is opposite, the volume of the first magnetic steel 402 can be reduced, more first magnetic steel 402 can be arranged, and the power and torque density are high.

In some embodiments, the first installation groove is a through groove, and the first magnetic steel 402 is embedded in the first installation groove, so that the rotating magnetic field generated by the motor stator 30 can act on the first magnetic steel 402 to drive the rotor. The core 401 moves, and the magnetic field generated by the first magnetic steel 402 can also act on the magnetic gear low-speed rotor 50 to drive the magnetic gear low-speed rotor 50 to rotate. Therefore, the motor rotor 40 can also be used as a magnetic gear high-speed rotor without a separate A high-speed rotor with a magnetic gear is provided to save cost, save space, and facilitate layout.

In some embodiments, in order to protect the rotor core 401 , the motor rotor 40 further includes: a protective cover 403 . The protective sleeve 403 is sleeved on the peripheral surface of the rotor core 401 to protect the peripheral surface of the rotor core 401 and prevent the rotor core 401 from being damaged.

In some embodiments, the material of the protective cover 403 is a non-magnetic material, so as to prevent the external magnetic field from interfering with the movement of the motor rotor 40. At the same time, it can also avoid the leakage of the magnetic field generated by the motor rotor 40 to ensure high power and torque density. The non-magnetic conductive material can be metals and alloys other than iron-cobalt-nickel and its alloys, such as copper, aluminum and aluminum alloys. From the viewpoint of cost reduction, the material of the protective cover 403 is preferably aluminum alloy.

Referring to FIG. 5 , in some embodiments, the magnetic gear low-speed rotor 50 includes: a magnetic gear low-speed rotor core 501 and a plurality of flux-regulating ring cores 502 . The magnetic gear low-speed rotor core 501 is set in the motor housing 10 and sleeved on the motor shaft 20. The output shaft 60 is set on the end surface of the magnetic gear low-speed rotor core 501 away from the motor rotor 40, and the output shaft 60 is rotatable. Through the motor casing 10 , the magnetic gear low-speed rotor core 501 can be supported by the motor casing 10 , and at the same time, can rotate smoothly in the motor casing 10 . The middle part of the magnetic gear low-speed rotor core 501 is provided with a third through hole 503, so that the motor shaft 20 can pass through, and the third through hole 503 is provided with a third bearing 504, and the motor shaft 20 can pass through the third bearing 504 to move smoothly in the magnetic field. The gear low-speed rotor core 501 rotates, and the rotation of the magnetic gear low-speed rotor core 501 and the rotation of the motor shaft 20 do not interfere with each other to ensure the normal operation of the equipment. At the same time, the magnetic gear low-speed rotor core 501 can also support the motor shaft 20 to ensure The stability of the rotation of the motor shaft 20.

In some embodiments, a plurality of second installation slots are opened on the axial end surface of the magnetic gear low-speed rotor core 501, and a plurality of magnetic modulation ring cores 502 are respectively arranged in the corresponding second installation slots. 502 can not only make the magnetic field generated by the motor rotor 40 act on the low-speed rotor core 501 of the magnetic gear to drive the low-speed rotor core 502 of the magnetic gear to rotate. At the same time, it can also realize magnetic adjustment, and there is no need to separately set the magnetic gear magnetic adjustment ring. Cost saving, space saving, easy to arrange.

Referring to FIG. 5 , in some embodiments, the second installation groove is a through groove, and the magnetic modulation ring core 502 is embedded in the first installation groove, so that the magnetic field generated by the motor rotor 20 can act on the magnetic modulation ring core 502 , To drive the magnetic gear low-speed rotor core 501 to move, and the end face of the motor housing 10 facing the magnetic gear low-speed rotor 50 is provided with a plurality of second magnetic steels 1022, and the plurality of second magnetic steels 1022 are axially magnetized. The polarity of the adjacent second magnetic steel 1022 is opposite to generate a magnetic field, and at the same time act on the magnetic adjustment ring core 502 to make the low-speed rotor core 501 of the magnetic gear generate high torque at low speed.

With reference to FIG. 5 , in some embodiments, in order to protect the magnetic gear low-speed rotor core 501 , the magnetic gear low-speed rotor 50 further includes: a magnetic ring bushing 505 . The magnetic ring bushing 505 is sheathed on the peripheral surface of the magnetic gear low-speed rotor core 501 to protect the peripheral surface of the magnetic gear low-speed rotor core 501 and prevent the magnetic gear low-speed rotor core 501 from being damaged.

In some embodiments, the material of the magnetic adjusting ring bushing 505 is a non-magnetic material to prevent the external magnetic field from interfering with the action of the magnetic gear low-speed rotor 50. At the same time, it can also avoid the magnetic field leakage generated by the magnetic gear low-speed rotor 50, ensuring power and Torque density. The non-magnetic conductive material can be metals and alloys other than iron-cobalt-nickel and its alloys, such as copper, aluminum and aluminum alloys. From the perspective of cost reduction, the material of the magnet adjusting ring bushing 505 is preferably aluminum alloy.

Referring to FIG. 5 , in some embodiments, for the convenience of arrangement, the radial cross-sectional shape of the magnetic modulation toroidal core 502 is fan-shaped, and at the same time, the preparation cost of the magnetic field modulation toroidal core 502 can be reduced, which is convenient for manufacture.

FIG. 6 shows a schematic structural view of the magnetic gear fixing seat of the motor in FIG. 1 . Referring to FIG. 1 , FIG. 2 and FIG. 6 , in some embodiments, the motor housing 10 includes: a housing 101 and a magnetic gear fixing seat 102 . The magnetic gear holder 102 includes: a flange end cover 1021 and a plurality of second magnetic steels 1022. The flange end cover 1021 covers the end surface of the housing 101 to form a space for accommodating the motor shaft 20, the motor stator 30, the motor rotor 40 and the magnetic gear low-speed rotor 50, and closes the housing 101 to prevent debris from entering the motor. In the housing 10, the safety of the equipment inside the motor housing 10 is guaranteed. Wherein, the middle part of the flange end cover 1021 is provided with a fourth through hole 1023, and the third through hole 1023 is provided with a first bearing 601, through the first bearing 601, the output shaft 60 can rotate smoothly at the flange end cover 1021, The low-speed high torque generated by the magnetic gear low-speed rotor 50 can be transmitted to external equipment.

Referring to FIG. 6 , in some embodiments, a plurality of second magnetic steels 1022 are attached to the end surface of the flange end cover facing the magnetic gear low-speed rotor 50 and magnetized in the axial direction. Every two adjacent second magnetic steels 1022 The polarity of the steel 1022 is opposite, the volume of the second magnetic steel 1022 can be reduced, more second magnetic steel 1022 can be arranged, and the power and torque density are high. At the same time, the magnetic fields generated by the plurality of second magnetic steels 1022 can act on the magnetizing ring core 502 of the magnetic gear low-speed rotor 50 , so that the magnetic gear low-speed rotor core 501 of the magnetic gear low-speed rotor 50 generates high torque at low speed.

In some embodiments, after electrification, the driver conducts the winding 304 of the motor stator 30 according to a certain phase sequence to generate a rotating magnetic field, drives the motor rotor 40 to generate rotational motion, and drives the magnetic gear low-speed rotor 50 to generate low-speed high-torque rotation, thereby The low-speed high torque is transmitted to the output shaft 60 . Specifically, the closed path of the magnetic flux of the motor is: any first magnetic steel 402 in the motor rotor 40 → rotor core 401 → air gap between the motor stator 30 and the motor rotor 40 → stator core 302 and winding 304 → motor stator 30 and motor rotor 40 To the adjacent first magnetic steel 402 with opposite magnetization direction→rotor core 401→any first magnetic steel 402 in the motor rotor 40 . The magnetic flux closed path of the magnetic gear is: any first magnetic steel 402 in the motor rotor 40→rotor core 401→air gap between the motor rotor 40 and the low-speed rotor 50 of the magnetic gear→magnetic ring core 502→low-speed rotor 50 of the magnetic gear and the magnetic Air gap between gear base 102→second magnetic steel 1022→flange end cover 1021 of magnetic gear base 102→second magnetic steel 1022 with opposite magnetization direction adjacent to it→air gap between magnetic gear low-speed rotor 50 and magnetic gear base 102→ Adjacent magnetic adjustment ring iron core 502→air gap between motor rotor 40 and magnetic gear low-speed rotor 50→rotor core 401→any first magnetic steel 402 in motor rotor 40.

6, in some embodiments, in order to facilitate the installation of the second magnetic steel 1022 on the flange end cover 1021, the end face of the flange end cover 1021 facing the magnetic gear low-speed rotor 50 is provided with a plurality of positioning parts, the second The magnetic steel 1022 is provided with a positioning groove 1024, and the positioning piece can be embedded in the positioning groove 1024. Through the positioning of the positioning piece and the positioning groove 1024, the second magnetic steel 1022 can be quickly installed on the flange end cover 1021, improving the installation efficiency. Efficiency, at the same time, also ensures installation accuracy.

In some embodiments, the positioning member can be a semicircular protrusion, the positioning groove 1024 can be a semicircular groove, and the diameter of the semicircular protrusion matches the diameter of the semicircular groove, and the semicircular The protrusion can be embedded in the semicircular groove, which is convenient for positioning and ensures installation accuracy.

Referring to FIG. 6 , in some embodiments, a plurality of locating parts are equiangularly and evenly spaced on the flange end cover 1021 , and the locating groove 1024 is provided on the peripheral surface of the second magnetic steel 1022 , so that the second magnetic steel 1022 can be easily positioned. position.

Referring to FIG. 1 , in some embodiments, a groove is provided at the end of the housing 101 away from the magnetic gear fixing seat 102 , and the end of the motor shaft 20 away from the magnetic gear low-speed rotor 50 is rotatably set in the groove. The housing 101 supports the motor shaft 20 so that the motor shaft 20 can support the motor rotor 40 . In this embodiment, a fifth through hole is opened at the groove, and a fourth bearing 103 is arranged in the fifth through hole, and the motor shaft 20 can rotate smoothly at the housing 101 through the fourth bearing 103, so as to support the motor rotor 40, to avoid interference with the rotation of the rotor 40 of the motor.

1, FIG. 2 and FIG. 6, in some embodiments, a first stopper 104 is provided on the peripheral surface of the end of the housing 101 facing the flange end cover 1021, and a first stopper 104 is provided on the peripheral surface of the flange end cover 1021. There is a second limiter 105, and the first limiter 104 is in conflict with the second limiter 105 to determine the position between the housing 101 and the magnetic gear holder 102. At the same time, the first limiter 104 can A threaded hole is provided with the second limiting member 105 to facilitate the connection between the housing 101 and the magnetic gear fixing seat 102 . In this embodiment, the cross-sectional shapes of the first limiting member 104 and the second limiting member 105 are ring-shaped, so as to facilitate the connection between the first limiting member 104 and the second limiting member 105 .

In some embodiments, the number of pole pairs of the first magnetic steel 402 of the motor rotor 40 is 4 or 5, and the number of pole pairs of the magnetic modulation ring core 502 of the magnetic gear low-speed rotor 50 is the number of pole pairs of the first magnetic steel 402 and The sum of the number of pole pairs of the second magnetic steel 1022 of the housing 101 can define the transmission ratio, so that the motor rotor 40 and the magnetic gear low-speed rotor 50 can function as a reducer.

In describing the present disclosure, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the present disclosure.

In the description of the present disclosure, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. Two features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

Having described preferred embodiments of the present disclosure, additional changes and modifications can be made to these embodiments by those of ordinary skill in the art once the basic inventive concept is understood. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the present disclosure.

It is obvious that those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and equivalent technologies thereof, the present disclosure also intends to include these modifications and variations.

Claims

A motor, comprising: a motor casing (10), a motor shaft (20), a motor stator (30), a motor rotor (40) and a magnetic gear low-speed rotor (50);

The motor shaft (20), the motor stator (30), the motor rotor (40) and the magnetic gear low-speed rotor (50) are all arranged in the motor housing (10);

The motor stator (30), the motor rotor (40) and the magnetic gear low-speed rotor (50) are arranged along the axial direction of the motor shaft (20) and sleeved on the motor shaft (20) , the motor rotor (40) is located between the motor stator (30) and the magnetic gear low-speed rotor (50).
The motor according to claim 1 according to claim 1, further comprising: an output shaft (60), connected to the magnetic gear low-speed rotor (50), and rotatably passed through the motor housing (10).
The motor according to claim 2, wherein an accommodating cavity is opened in the output shaft (60), and the end of the motor shaft (20) is rotatably arranged in the accommodating cavity.
The motor according to any one of claims 1-2, wherein the motor stator (30) comprises:

a wire stand (301), arranged in the motor casing (10), and sleeved on the motor shaft (20);

A plurality of stator cores (302) are arranged in the wire frame (301), and each of the stator cores (302) is provided with a winding (304).
The motor according to claim 4, wherein the radial cross-sectional shape of the stator core (302) is an isosceles trapezoid, and the axial cross-sectional shape of the stator core (302) is an I-shape.
The motor according to any one of claims 1-2, wherein the motor rotor (40) is a magnet-concentrating spoke structure.
The motor according to any one of claims 1-2, wherein the motor rotor (40) comprises:

a rotor core (401), connected to the motor shaft (20), and a plurality of first installation grooves are opened on the axial end surface of the rotor core (401);

A plurality of first magnetic steels (402) are arranged in the corresponding first installation grooves respectively, and are radially magnetized, and the polarities of every two adjacent first magnetic steels (402) are opposite .
The motor according to claim 7, wherein the motor rotor (40) further comprises: a protective sleeve (403), sleeved on the peripheral surface of the rotor core (401).
The motor according to any one of claims 1-2, wherein the magnetic gear low-speed rotor (50) comprises:

The magnetic gear low-speed rotor core (501) is sleeved on the motor shaft (20), and the axial end surface of the magnetic gear low-speed rotor core (501) is provided with a plurality of second installation grooves;

A plurality of magnetic modulation ring cores (502) are respectively arranged in the corresponding second installation grooves.
The motor according to claim 9, wherein the magnetic gear low-speed rotor (50) further comprises: a magnetic ring bushing (505), sleeved on the peripheral surface of the magnetic gear low-speed rotor core (501).
The motor according to any one of claims 1-2, wherein the motor housing (10) comprises:

housing (101);

The magnetic gear fixing seat (102) includes: a flange end cover (1021) and a plurality of second magnetic steels (1022); the flange end cover (1021) is covered on the end surface of the housing (101) , to form a space for accommodating the motor shaft (20), the motor stator (30), the motor rotor (40) and the magnetic gear low-speed rotor (50); a plurality of the second magnetic steel ( 1022) is attached to the end face of the flange end cover (1021) facing the magnetic gear low-speed rotor (50), and is magnetized in the axial direction, and every two adjacent second magnetic steels (1022) opposite in polarity.
The motor according to claim 11, wherein a plurality of positioning pieces are provided on the end face of the flange end cover (1021) facing the magnetic gear low-speed rotor (50), and the second magnetic steel (1022) is A positioning slot (1024) is opened, and the positioning piece can be embedded in the positioning slot (1024).
The motor according to claim 11, wherein a groove is provided at the end of the housing (101) away from the magnetic gear fixing seat (102), and the motor shaft (20) is far away from the low-speed rotor of the magnetic gear The end of (50) is rotatably arranged in the groove.
The motor according to claim 11, wherein a first stopper (104) is provided on the peripheral surface of the end of the housing (101) facing the flange end cover (1021), and the flange A second limiting member (105) is provided on the peripheral surface of the end cover (1021), and the first limiting member (104) is in conflict with the second limiting member (105).
The motor according to any one of claims 1-2, wherein: the number of pole pairs of the first magnetic steel (402) of the motor rotor (40) is 4 or 5, and the magnetic gear low-speed rotor (50 The number of pole pairs of the magnetic modulation ring core (502) of ) is the sum of the number of pole pairs of the first magnet steel (402) and the number of pole pairs of the second magnet steel (1022) of the housing (101).