CN114337187A - In-wheel motor and vehicle - Google Patents
In-wheel motor and vehicle Download PDFInfo
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- CN114337187A CN114337187A CN202111665311.6A CN202111665311A CN114337187A CN 114337187 A CN114337187 A CN 114337187A CN 202111665311 A CN202111665311 A CN 202111665311A CN 114337187 A CN114337187 A CN 114337187A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
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Abstract
The invention belongs to the technical field of driving equipment, and particularly relates to a hub motor and a vehicle. The in-wheel motor includes: the motor comprises a motor shell, a motor shaft, a motor rotor, a motor stator, a magnetic gear high-speed rotor and a magnetic gear low-speed rotor; the motor shaft, the motor rotor, the motor stator, the magnetic gear high-speed rotor and the magnetic gear low-speed rotor are all arranged in the motor shell; the motor rotor is sleeved on the motor stator; the motor rotor and the magnetic gear high-speed rotor are arranged and connected along the axial direction of the motor shaft, the magnetic gear high-speed rotor is sleeved on the motor shaft, and a cavity is formed in the magnetic gear high-speed rotor; the magnetic gear low-speed rotor is sleeved on the magnetic gear high-speed rotor. The hub motor and the vehicle can improve the compactness of the whole structure and reduce the volume and the weight of a product.
Description
Technical Field
The application belongs to the technical field of driving equipment, and particularly relates to a wheel hub motor and a vehicle.
Background
The magnetic gear has the advantages of low noise, high efficiency, convenience in maintenance, high reliability and the like, can be used for replacing a mechanical gear, and can realize low-speed and high-torque operation in a direct drive system, so that the magnetic gear type hub motor technology is generally concerned in recent years.
The magnetic gear type hub motor combines the motor and the concentric magnetic gear together by adopting a sleeve type structure, the performance of the motor cannot be greatly exerted, and the torque and the power density of the motor are low.
Disclosure of Invention
In order to solve the technical problems, the invention provides an in-wheel motor and a vehicle, and aims to solve the technical problems that the in-wheel motor is not compact in structure and large in size and weight to a certain extent.
The technical scheme of the invention is as follows:
an in-wheel motor, characterized by comprising: the motor comprises a motor shell, a motor shaft, a motor rotor, a motor stator, a magnetic gear high-speed rotor, a magnetic gear low-speed rotor and a brake; the motor shaft, the motor rotor, the motor stator, the magnetic gear high-speed rotor and the magnetic gear low-speed rotor are all arranged in the motor shell; the motor rotor is sleeved on the motor stator; the motor rotor and the magnetic gear high-speed rotor are arranged and connected along the axial direction of the motor shaft, the magnetic gear high-speed rotor is sleeved on the motor shaft and provided with a cavity, and the brake is arranged in the cavity and connected with the motor shell and the motor shaft; the magnetic gear low-speed rotor is sleeved on the magnetic gear high-speed rotor.
The motor shaft, the motor rotor, the motor stator, the high-speed rotor of the magnetic gear, the low-speed rotor of the magnetic gear, the motor rotor is sleeved on the motor stator, the motor rotor and the high-speed rotor of the magnetic gear are arranged and connected along the axial direction of the motor shaft, the high-speed rotor of the magnetic gear is sleeved on the motor shaft and connected with the motor housing and the motor shaft, the low-speed rotor of the magnetic gear is sleeved on the high-speed rotor of the magnetic gear, when the hub needs to be driven, the motor stator is conducted to generate a rotating magnetic field, the motor rotor rotates, the motor rotor drives the high-speed rotor of the magnetic gear to rotate, the high-speed rotor of the magnetic gear drives the low-speed rotor of the magnetic gear to generate low-speed large torque to drive external equipment to act, compared with the brake arranged outside the housing, the high-speed rotor of the magnetic gear is provided with a cavity, the brake is arranged in the cavity, and the compactness of the whole structure is improved, the volume and the weight of the product are reduced.
In some embodiments, the in-wheel motor further comprises an encoder, wherein the encoder is arranged through the motor shell and connected with the motor shaft for data transmission.
In some embodiments, the in-wheel motor further comprises a connection portion through which the motor rotor and the magnetic geared high speed rotor are connected, the motor rotor having an inner diameter greater than an inner diameter of the magnetic geared high speed rotor.
In some embodiments, the connection portion is annular and perpendicular to an axial direction of the electronic rotor to enable connection of the motor rotor and the magnetic gear high speed rotor.
In some embodiments, the magnetic geared low speed rotor comprises: a magnetic adjusting ring fixing bracket; and the magnetic adjusting ring cores are arranged on the magnetic adjusting ring fixing support.
The high-speed rotor of magnetic gear rotates to produce magnetic field, acts on a plurality of accent magnetic ring cores then, and a plurality of accent magnetic ring cores drive accent magnetic ring fixed bolster and rotate, in order to give wheel hub with power transmission, drive the wheel hub and rotate.
In some embodiments, the motor housing includes a magnetic gear mount through which the magnetic geared low speed rotor is rotatably mounted to accommodate a magnetic geared high speed rotor and a magnetic geared low speed rotor.
In some embodiments, the magnetic gear fixing seat includes a second housing sleeved on the magnetic gear low-speed rotor, the inner circumferential surface of the second housing is provided with a plurality of third permanent magnets, and the polarities of every two adjacent third permanent magnets are opposite.
When the magnetic field generated by the high-speed rotor of the magnetic gear acts on the low-speed rotor of the magnetic gear to drive the low-speed rotor of the magnetic gear to rotate, and meanwhile, the magnetic field generated by the third permanent magnet also acts on the magnetic adjusting ring core of the low-speed rotor of the magnetic gear, so that the low-speed rotor of the magnetic gear can generate low-speed large torque.
In some embodiments, the magnetic gear low-speed rotor further comprises an output end cover connected with the magnetic adjusting ring fixing support and rotatably arranged through the motor shell.
When the magnetic gear low-speed rotor rotates, the magnetic ring fixing support drives the output end cover to rotate, and then power is transmitted to the hub, so that the hub rotates.
In some embodiments, the output end cap defines a rotation hole therein, and an end of the motor shaft is rotatably disposed in the rotation hole.
The end of the motor shaft is supported through the accommodating cavity to ensure that the motor shaft can support the magnetic gear high-speed rotor.
In some embodiments, the motor casing comprises: a first housing; the magnetic gear fixing seat is connected with the first shell, and the magnetic gear low-speed rotor rotatably penetrates through the magnetic gear fixing seat; the motor stator and the motor rotor are arranged in the first shell, and the magnetic gear high-speed rotor and the magnetic gear low-speed rotor are arranged in the magnetic gear fixing seat.
Accommodate motor stator and electric motor rotor through the casing to protection motor stator and electric motor rotor hold magnetic gear high speed rotor and magnetic gear low speed rotor through the magnetic gear fixing base, with protection magnetic gear high speed rotor and magnetic gear low speed rotor.
In some embodiments, the first housing comprises: a first sleeve; a second sleeve; a connector connected to ends of the first sleeve and the second sleeve; the motor stator is arranged between the first sleeve and the second sleeve and is positioned on the inner side of the connecting piece.
The accommodating space is formed by the distance between the first sleeve and the second sleeve to accommodate the motor stator, so that the compactness of the whole structure is improved, and the volume and the weight of a product are reduced.
In some embodiments, a first limiting member is disposed on a circumferential surface of the end portion of the first housing facing the magnetic gear fixing seat, a second limiting member is disposed on the magnetic gear fixing seat, and the first limiting member and the second limiting member are in contact with each other to determine a position between the housing and the magnetic gear fixing seat, so that the magnetic gear fixing seat is convenient to install.
In some embodiments, an encoder is disposed within the second sleeve, the encoder being coupled to the motor shaft.
The encoder is accommodated through the second sleeve, the compactness of the whole structure is improved, and the size and the weight of a product are reduced.
In some embodiments, the end of the second sleeve remote from the connector is provided with a support connected to the stopper to support the fixed end of the stopper.
In some embodiments, the supporting member has a through hole, and the end of the motor shaft is rotatably disposed in the through hole to facilitate the movement of the motor shaft.
In some embodiments, the number of pole pairs of the second permanent magnet of the high-speed rotor of the magnetic gear is 4 or 5, the number of pole pairs of the magnetic adjusting ring core of the low-speed rotor of the magnetic gear is the sum of the number of pole pairs of the second permanent magnet and the number of pole pairs of the third permanent magnet of the motor casing, and a transmission ratio can be defined so that the high-speed rotor of the magnetic gear and the low-speed rotor of the magnetic gear realize the function of a speed reducer.
Based on the same inventive concept, the application also provides a vehicle comprising the hub motor.
In some embodiments, the vehicle comprises: the hub is connected with the hub motor; the tire is sleeved on the hub.
The motor stator is conducted to generate a rotating magnetic field, the motor rotor rotates, the motor rotor drives the magnetic gear high-speed rotor to rotate, the magnetic gear high-speed rotor drives the magnetic gear low-speed rotor to generate low-speed large torque, the magnetic gear low-speed rotor transmits power to the wheel hub through the output end cover to drive the outer wheel hub to act, and the wheel hub drives the tire to rotate.
The beneficial effects of the invention at least comprise:
in the process of researching a magnetic gear compound motor, the motor and a concentric magnetic gear are combined together in a sleeve mode, so that the length-diameter ratio of the motor is limited by space, meanwhile, in order to avoid magnetic circuit interference, the number of pole pairs of an outer rotor of the motor needs to be the same as the number of pole pairs of an inner rotor of the gear at a high speed, the number of pole pairs cannot be changed, the performance of the motor cannot be greatly exerted, and the torque density and the power of the motor are low.
Based on the technical scheme, the motor shaft, the motor rotor, the motor stator and the magnetic gear high-speed rotor are arranged in the motor shell, the motor rotor is sleeved on the motor stator, the motor rotor and the magnetic gear high-speed rotor are arranged and connected along the axial direction of the motor shaft, the magnetic gear high-speed rotor is sleeved on the motor shaft and connected with the motor shell and the motor shaft, the magnetic gear low-speed rotor is sleeved on the magnetic gear high-speed rotor, when a hub is required to be driven, the motor stator is conducted to generate a rotating magnetic field, the motor rotor rotates, the motor rotor drives the magnetic gear high-speed rotor to rotate, the magnetic gear high-speed rotor drives the magnetic gear low-speed rotor to generate low-speed large torque so as to drive external equipment to act, and compared with the method that the brake is arranged outside the shell, the size is large, the structure is not compact, the magnetic gear high-speed rotor is provided with a cavity, and the brake can be arranged in the cavity, the compactness of the whole structure is improved, and the volume and the weight of the product are reduced.
Because motor rotor cover locates on motor stator, the cavity has been seted up to the high-speed rotor of magnetic gear, so, motor rotor and the high-speed rotor of magnetic gear form hollow structure, compare in the restriction that the draw ratio received the space, can't set up more number of poles, this application can arrange more number of poles on motor rotor and the high-speed rotor of magnetic gear global, and can not increase whole weight, power and torque density are high, and simultaneously, the inside heat dissipation of also being convenient for, guarantee motor stator, motor rotor, the normal operating of the high-speed rotor of magnetic gear and magnetic gear low-speed rotor.
Because motor rotor and the high-speed rotor of magnetic gear set up along the axial of motor shaft and connect, so, compare and locate motor rotor in the high-speed rotor cover of magnetic gear, the number of pole pairs of motor outer rotor needs to be the same with the high-speed rotor number of pole pairs of gear, the number of pole pairs can't be changed, this application motor rotor directly drives the high-speed rotor action of magnetic gear, can be according to the performance requirement of motor, the number of pole pairs of adjustment motor rotor and the high-speed rotor of magnetic gear, the number of pole pairs that makes motor rotor and the high-speed rotor of magnetic gear is different, power and torque density are high, guarantee that the performance of motor can obtain abundant performance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hub motor according to the present embodiment;
FIG. 2 is a sectional view taken along line A-A of the in-wheel motor of FIG. 1;
FIG. 3 is a sectional view of the hub motor of FIG. 1 taken along line B-B;
FIG. 4 is an exploded view of the hub motor of FIG. 1;
fig. 5 is a schematic structural view of a magnetic gear low-speed rotor of the hub motor in fig. 1.
In the drawings:
the motor comprises a motor shell 10, a first shell 101, a magnetic gear fixing seat 102, a first sleeve 1011, a second sleeve 1012, a connecting ring 1013, a second shell 1021, a third permanent magnet 1022, a first limiting piece 104, a second limiting piece 105 and a support 1014;
the motor shaft 20, the third bearing 201;
a motor rotor 30, a third housing 301, a first permanent magnet 302;
the motor stator 40, the stator core 401, the winding 402;
a magnetic gear high-speed rotor 50, a fourth shell 501, a second permanent magnet 502;
the magnetic gear low-speed rotor 60, a magnetic adjusting ring fixing support 601, a magnetic adjusting ring core 602, a first bearing 603, an output end cover 604 and a second bearing 605;
an encoder 70;
a brake 80;
a hub 90;
a tire 100;
a connecting portion 110.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
It should be noted that all the directional indications in the embodiments of the present invention are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The application is described below with reference to specific embodiments in conjunction with the following drawings:
the wheel hub motor that this embodiment provided aims at solving wheel hub motor structure not compact to a certain extent at least, the big technical problem of volume and weight of product.
Fig. 1 is a schematic structural diagram of a hub motor according to the present embodiment; FIG. 2 is a sectional view taken along line A-A of the in-wheel motor of FIG. 1;
FIG. 3 is a sectional view of the hub motor of FIG. 1 taken along line B-B; fig. 4 is an exploded view of the hub motor of fig. 1. Referring to fig. 1, 2, 3 and 4, the in-wheel motor of the present embodiment includes: motor housing 10, motor shaft 20, motor rotor 30, motor stator 40, magnetic gear high-speed rotor 50, magnetic gear low-speed rotor 60 and brake 80. The motor shaft 20, the motor rotor 30, the motor stator 40, the magnetic gear high-speed rotor 50 and the magnetic gear low-speed rotor 60 are all arranged in the motor casing 10. The motor rotor 30 is sleeved on the motor stator 40. The motor rotor 30 and the magnetic gear high-speed rotor 50 are axially arranged along the motor shaft 20 and connected, the magnetic gear high-speed rotor 50 is sleeved on the motor shaft 20, the magnetic gear high-speed rotor 50 is provided with a cavity, and the brake 80 is arranged in the cavity and connected with the motor shell 10 and the motor shaft 20. The magnetic gear low-speed rotor 60 is sleeved on the magnetic gear high-speed rotor 50.
In the process of researching a magnetic gear compound motor, the motor and a concentric magnetic gear are combined together in a sleeve mode, so that the length-diameter ratio of the motor is limited by space, meanwhile, in order to avoid magnetic circuit interference, the number of pole pairs of an outer rotor of the motor needs to be the same as the number of pole pairs of an inner rotor of the gear at a high speed, the number of pole pairs cannot be changed, the performance of the motor cannot be greatly exerted, and the torque density and the power of the motor are low.
Based on this, in some embodiments, the motor shaft 20, the motor rotor 30, the motor stator 40, the magnetic gear high-speed rotor 50, and the magnetic gear low-speed rotor 60 are all disposed in the motor housing 10, the motor rotor 30 is sleeved on the motor stator 40, the motor rotor 30 and the magnetic gear high-speed rotor are disposed and connected along the axial direction of the motor shaft, the magnetic gear high-speed rotor is sleeved on the motor shaft and connected with the motor housing and the motor shaft, the magnetic gear low-speed rotor 60 is sleeved on the magnetic gear high-speed rotor, when the hub needs to be driven, the motor stator 40 is conducted to generate a rotating magnetic field, the motor rotor 30 rotates, the motor rotor 30 drives the magnetic gear high-speed rotor to rotate, the magnetic gear high-speed rotor drives the magnetic gear low-speed rotor 60 to generate a large low-speed torque to drive external devices, and compared with the brake 80 disposed outside the housing, the size is large, and the structure is not compact, the high-speed rotor of magnetic gear of this application has seted up the cavity, sets up stopper 80 in the cavity, improves overall structure's compactedness, reduces the volume and the weight of product.
In some embodiments, because motor rotor 30 cover is located on motor stator 40, the cavity has been seted up to the high-speed rotor of magnetic gear, so, motor rotor 30 and the high-speed rotor of magnetic gear form hollow structure, compare in the restriction that draw ratio received the space, can't set up more number of poles, this application can arrange more number of poles on motor rotor 30 and the high-speed rotor of magnetic gear's global, and can not increase whole weight, power and torque density are high, and simultaneously, the inside heat dissipation of also being convenient for, guarantee motor stator 40, motor rotor 30, the high-speed rotor 50 of magnetic gear and the normal operating of magnetic gear low-speed rotor 60.
In some embodiments, because motor rotor 30 and the high-speed rotor of magnetic gear set up and connect along the axial of motor shaft, so, compare in the high-speed rotor of magnetic gear set and locate motor rotor 30, the number of pole pairs of motor outer rotor needs to be the same with the number of pole pairs of the high-speed rotor of gear, can't change the number of pole pairs, this application motor rotor 30 directly drives the action of the high-speed rotor of magnetic gear, can be according to the performance requirement of motor, the number of pole pairs of adjustment motor rotor 30 and the high-speed rotor of magnetic gear, make the number of pole pairs of motor rotor 30 and the high-speed rotor of magnetic gear different, power and torque density are high, guarantee that the performance of motor can obtain abundant performance.
Referring to fig. 1, in some embodiments, the motor stator 40 is fixedly disposed in the motor housing 10 to support the motor stator 40 through the motor housing 10.
Referring to fig. 1, in some embodiments, the motor shaft 20 is rotatably disposed in the motor housing 10, the magnetic gear high-speed rotor 50 is fixedly connected to the motor rotor 30 and the motor shaft 20, and the magnetic gear high-speed rotor 50 and the motor rotor 30 are supported by the motor shaft 20, when the motor stator 40 is conducted to generate a rotating magnetic field, the motor rotor 30 rotates, and simultaneously drives the magnetic gear high-speed rotor 50 to rotate, and then drives the motor shaft 20 to rotate in the motor housing 10 to support the magnetic gear high-speed rotor 50 and the motor rotor 30.
In some embodiments, the magnetic gear low-speed rotor 60 is rotatably disposed in the motor housing 10, and when the magnetic gear high-speed rotor 50 rotates, the magnetic gear low-speed rotor 60 is driven to rotate, so as to generate a low-speed large torque and transmit the power to the hub 90.
In some embodiments, in conjunction with fig. 1, to transmit data, the hub motor further includes an encoder 70. The encoder 70 is disposed through the motor housing 10 and connected to the motor shaft 20 for data transmission.
Referring to fig. 1, in some embodiments, the fixed end of the brake 80 is fixedly disposed on the motor housing 10, the brake 80 is supported by the motor housing 10, and the actuating end of the brake 80 is sleeved on the motor shaft 20. When the braking is to be realized, the fixed end of the brake 80 adsorbs the action end of the brake 80, so that the motor shaft 20 stops rotating, and then the magnetic gear high-speed rotor 50 stops rotating, and the motor rotor 30 stops rotating, thereby realizing the braking.
In conjunction with fig. 1 and 4, in some embodiments, the motor stator 40 includes: a stator core 401 and windings 402. The windings 402 are provided to the stator core 401, and the windings 402 are supported by the stator core 401. The conduction of the winding 402 is performed to make the winding 402 generate a rotating magnetic field to rotate the motor rotor 30.
In conjunction with fig. 1 and 4, in some embodiments, the motor rotor 30 includes: a third housing 301 and a plurality of first permanent magnets 302. The third casing 301 is disposed in the motor case 10, and is connected to the magnetic gear high-speed rotor 50, and the third casing 301 is supported by the magnetic gear high-speed rotor 50. The plurality of first permanent magnets 302 are disposed on the inner circumferential surface of the third casing 301, and the polarity of each two adjacent first permanent magnets 302 is opposite, and the plurality of first permanent magnets 302 are supported by the third casing 301.
In some embodiments, when the motor stator 40 is turned on to generate a rotating magnetic field, the rotating magnetic field acts on the first permanent magnets 302 to rotate the first permanent magnets 302, and the first permanent magnets 302 drive the third casing 301 to rotate, so as to rotate the motor rotor 30.
In some embodiments, the first permanent magnets 302 are fixed on the inner circumferential surface of the third housing 301 at equal angular intervals to ensure the stability of the rotation of the third housing 301.
In conjunction with fig. 1 and 4, in some embodiments, the magnetic geared high speed rotor 50 includes: a fourth housing 501 and a plurality of second permanent magnets 502. The fourth casing 501 is disposed in the motor casing 10, and is sleeved on the motor shaft 20, the fourth casing 501 is supported by the motor shaft 20, the fourth casing 501 is connected to the motor rotor 30, the third casing 301 of the motor rotor 30 is supported by the fourth casing 501, and meanwhile, when the motor rotor 30 rotates, the third casing 301 of the motor rotor 30 can drive the fourth casing 501 to rotate. The plurality of second permanent magnets 502 are arranged on the outer peripheral surface of the fourth shell 501, the fourth shell 501 supports the plurality of second permanent magnets 502, and the second permanent magnets 502 can generate a magnetic field to drive the magnetic gear low-speed rotor 60 to move.
In some embodiments, when the motor rotor 30 rotates, the third casing 301 of the motor rotor 30 directly drives the fourth casing 501 to rotate, and the fourth casing 501 drives the plurality of second permanent magnets 502 to rotate, so as to generate a magnetic field to drive the magnetic gear low-speed rotor 60 to move.
In some embodiments, the second permanent magnets 502 are fixed on the outer circumferential surface of the fourth casing 501 at equal angular intervals, so as to ensure the stability of driving the magnetic gear low-speed rotor 60 to rotate.
With reference to fig. 1, in some embodiments, the in-wheel motor further includes a connecting portion 110, and the motor rotor 30 and the magnetic gear high-speed rotor 50 are connected through the connecting portion 110 to achieve connection of the motor rotor 30 and the magnetic gear high-speed rotor 50. The inner diameter of the motor rotor 30 is larger than the inner diameter of the magnetic gear high-speed rotor 50 to facilitate the arrangement of the motor rotor 30 and the magnetic gear high-speed rotor 50.
In some embodiments, the connecting portion 110 is annular and perpendicular to the axial direction of the motor rotor 30, i.e.: the inner ring of the connecting portion 110 is connected to the magnetic gear high-speed rotor 50, and the outer ring of the connecting portion 110 is connected to the motor rotor 30, so that the connection between the motor rotor 30 and the magnetic gear high-speed rotor 50 is facilitated, and at the same time, the connection between the motor shaft 20 and the magnetic gear high-speed rotor 50 is facilitated.
Referring to fig. 5, in some embodiments, the magnetic geared low speed rotor 60 includes: a magnetic adjusting ring fixing bracket 601 and a plurality of magnetic adjusting ring cores 602. The magnetic ring fixing support 601 is arranged in the motor shell 10, and the magnetic ring fixing support 601 is sleeved on the magnetic gear high-speed rotor 50. The plurality of magnetic ring adjusting cores 602 are disposed on the magnetic ring adjusting fixing bracket 601 to support the plurality of magnetic ring adjusting cores 602 through the magnetic ring adjusting fixing bracket 601.
In some embodiments, the magnetic adjusting ring fixing bracket 601 is made of non-magnetic conductive and non-conductive materials to reduce loss. In this embodiment, the material of the magnetic adjusting ring fixing bracket 601 may be resin or plastic.
In some embodiments, the magnetic geared high speed rotor 50 rotates to generate a magnetic field that in turn acts on the plurality of magnetic tone ring cores 602, and the plurality of magnetic tone ring cores 602 rotate the magnetic tone ring fixing bracket 601 to transmit power to the hub 90, driving the hub 90 to rotate. Meanwhile, the magnetic adjustment can be performed through the plurality of magnetic adjustment ring cores 602, and a magnetic gear magnetic adjustment ring does not need to be arranged independently, so that the cost is saved, the space is saved, and the arrangement is convenient.
In some embodiments, the plurality of magnetic adjustment ring cores 602 are fixed on the outer circumferential surface of the magnetic adjustment ring fixing bracket 601 at equal angular intervals to ensure the stability of the rotation of the magnetic gear low-speed rotor 60.
With reference to fig. 1 and 4, in some embodiments, in order to ensure that the magnetic gear low-speed rotor 60 smoothly rotates in the motor casing 10, a first bearing 603 is disposed between the magnetic ring fixing bracket 601 and the motor casing 10, and the magnetic ring fixing bracket 601 is supported by the first bearing 603, and at the same time, smooth rotation of the magnetic ring fixing bracket 601 in the motor casing 10 is also ensured.
With reference to fig. 1 and 4, in some embodiments, a plurality of mounting grooves are formed in the magnetic adjustment ring fixing support 601, the mounting grooves correspond to the magnetic adjustment ring cores 602 one to one, and the magnetic adjustment ring cores 602 are embedded in the corresponding mounting grooves, so as to ensure the mounting stability of the magnetic adjustment ring cores 602. Meanwhile, the mounting groove is a through groove, so that a magnetic field generated by the high-speed rotor 50 of the magnetic gear can act on the magnetic ring adjusting core 602 to drive the magnetic ring adjusting fixing support 601 to rotate, and meanwhile, a magnetic field generated by the third permanent magnet 1022 of the motor casing 10 can also act on the magnetic ring adjusting core 602, so that the low-speed high-torque rotor 60 of the magnetic gear can generate low-speed high torque.
Referring to fig. 1 and 4, in some embodiments, the motor housing 10 includes a magnetic gear holder 102, and the magnetic gear low-speed rotor 60 is rotatably disposed through the magnetic gear holder 102. That is, the output end cover 604 rotatably penetrates the magnetic gear fixing base to ensure smooth rotation of the magnetic gear low-speed rotor 60 and output of power of the magnetic gear low-speed rotor 60.
Referring to fig. 1 and 4, in some embodiments, the magnetic gear fixing base 102 includes a second housing 1021 sleeved on the magnetic gear low-speed rotor 60, a plurality of third permanent magnets 1022 are disposed on an inner circumferential surface of the second housing 1021, and the third permanent magnets 1022 are supported by the second housing 1021. Every two adjacent third permanent magnets 1022 are opposite in polarity.
In some embodiments, when the magnetic field generated by the magnetic gear high-speed rotor 50 acts on the magnetic gear low-speed rotor 60 to rotate the magnetic gear low-speed rotor 60, the magnetic field generated by the third permanent magnet 1022 also acts on the magnetic adjusting ring core 602 of the magnetic gear low-speed rotor 60, so that the magnetic gear low-speed rotor 60 generates a low-speed high torque.
With reference to fig. 1 and 4, in some embodiments, the in-wheel motor further includes: and the output end cover 604 is connected with the magnetic adjusting ring fixing bracket 601. Namely: the output end cover 604 is disposed on an end surface of the magnetic gear low-speed rotor 60 facing away from the motor rotor 30, and rotatably penetrates through the motor casing 10. Because the output end cover 604 is connected with the magnetic gear low-speed rotor 60, the output end cover 604 can support the magnetic gear low-speed rotor 60, and then the first bearing 603 can be arranged between the output end cover 604 and the motor casing 604, the output end cover 604 is supported through the first bearing 603, and meanwhile, the smooth rotation of the output end cover 604 on the motor casing 10 can also be ensured.
In some embodiments, in conjunction with fig. 1 and 4, to ensure power output, an output end cap 604 is coupled to the hub 90. When the magnet gear low-speed rotor 60 rotates, the output cover 604 rotates, and in turn, transmits power to the hub 90 to rotate the hub 90.
Referring to fig. 1 and 4, in some embodiments, a rotation hole is formed in the output end cover 604, one end of the motor shaft 20 is rotatably disposed in the rotation hole, an end of the motor shaft 20 away from the motor stator 40 is rotatably disposed in the rotation hole, and the end of the motor shaft 20 is supported by a hole wall of the rotation hole, so as to ensure that the motor shaft 20 can support the magnetic gear high-speed rotor 50.
In some embodiments, the output end cover 604 and the low-speed rotor 60 of the magnetic gear are mechanically riveted and attached with epoxy glue, so that the connection is ensured to be firm.
Referring to fig. 1 and 4, in some embodiments, a second bearing 605 is disposed in the accommodating cavity, and the second bearing 605 supports the end of the motor shaft 20, and at the same time, it is ensured that the motor shaft 20 can rotate smoothly in the output cover 604, and the rotation of the motor shaft 20 and the rotation of the output cover 604 do not interfere with each other.
Referring to fig. 1 and 4, in some embodiments, a through hole is formed in the motor housing 10, and an end of the motor shaft 20 away from the magnetic gear low-speed rotor 60 is rotatably disposed in the through hole, and supports the end of the motor shaft 20 through the through hole, so as to ensure that the motor shaft 20 can support the magnetic gear high-speed rotor 50.
Referring to fig. 1 and 4, in some embodiments, a third bearing 201 is disposed in the through hole, and the end of the motor shaft 20 is supported by the third bearing 201, and at the same time, the motor shaft 20 can rotate smoothly in the motor housing 10.
In conjunction with fig. 1 and 4, in some embodiments, the motor housing 10 includes: a first housing 101 and a magnetic gear holder 102. The magnetic gear fixing base 102 is connected to the first housing 101, and the magnetic gear low-speed rotor 60 rotatably penetrates through the magnetic gear fixing base 102, that is, the output end cover 604 rotatably penetrates through the magnetic gear fixing base, so as to ensure smooth rotation of the magnetic gear low-speed rotor 60 and ensure output of power of the magnetic gear low-speed rotor 60. The motor stator 40 and the motor rotor 30 are disposed in the first housing 101, and the motor stator 40 and the motor rotor 30 are accommodated in the first housing 101 to protect the motor stator 40 and the motor rotor 30. The magnetic gear high-speed rotor 50 and the magnetic gear low-speed rotor 60 are arranged in the magnetic gear fixing seat 102, and the magnetic gear high-speed rotor 50 and the magnetic gear low-speed rotor 60 are accommodated in the magnetic gear fixing seat 102 so as to protect the magnetic gear high-speed rotor 50 and the magnetic gear low-speed rotor 60.
In conjunction with fig. 1 and 4, in some embodiments, the first housing 101 includes: a first sleeve 1011, a second sleeve 1012, and a connecting ring 1013. The second sleeve 1012 is located within the first sleeve 1011. The connecting member 1013 is connected to the ends of the first and second sleeves 1011 and 1012 to achieve the connection of the first and second sleeves 1011 and 1012. The motor stator 40 is disposed between the first sleeve 1011 and the second sleeve 1012 and located inside the connecting member 1013, so as to accommodate the motor stator 40 by an accommodating space formed by a distance between the first sleeve 1011 and the second sleeve 1012, thereby improving compactness of the overall structure and reducing volume and weight of the product.
With reference to fig. 1 and 4, in some embodiments, the encoder 70 is disposed through the second sleeve 1012 to be connected to the motor shaft 20, and the encoder 70 is disposed in the second sleeve 1012, so that the second sleeve 1012 accommodates the encoder 70, thereby improving compactness of the overall structure and reducing volume and weight of the product.
In some embodiments, the connecting member 1013 is annular, the outer ring of the connecting member 1013 is connected to the end of the first sleeve 1011, and the inner ring of the connecting member 1013 is connected to the second sleeve 1012, so that the first sleeve 1011 and the second sleeve 1012 are spaced apart from each other to form a receiving space for receiving the motor stator 40.
In some embodiments, after being powered on, the driver conducts the windings 402 in the motor stator 40 according to a certain phase sequence to generate a rotating magnetic field, so as to drive the motor rotor 30 and the magnetic gear high-speed rotor 50 to generate high-speed rotation, drive the magnetic gear low-speed rotor 60 to generate low-speed rotation, and drive the hub 90 and the tire 100 to complete low-speed and high-torque movement through the output end cover 604 in the magnetic gear low-speed rotor 60.
In some embodiments, the motor flux closed path is: any first permanent magnet 302 in motor rotor 30 → the air gap between motor stator 40 and motor rotor 30 → stator core 401 and winding 402 → the air gap between motor stator 40 and motor rotor 30 → first permanent magnet 302 in motor rotor 30 with opposite adjacent magnetization directions → any first permanent magnet in motor outer rotor 4.
In some embodiments, the magnetic gear flux closes the path: any second permanent magnet 502 in the high-speed rotor 50 of the magnetic gear → the air gap between the high-speed rotor 50 of the magnetic gear and the low-speed rotor 60 of the magnetic gear → the magnetic modulating ring core 602 in the low-speed rotor 60 of the magnetic gear → the air gap between the low-speed rotor 60 of the magnetic gear and the magnetic gear fixing base 102 → the third permanent magnet 1022 in the magnetic gear fixing base 102 → the second housing 1021 in the magnetic gear fixing base 102 → the third permanent magnet 1022 in the magnetic gear fixing base 102 which is opposite in adjacent magnetizing direction → the air gap between the low-speed rotor 60 of the magnetic gear and the magnetic gear fixing base 102 → the adjacent magnetic modulating ring core 602 in the low-speed rotor 60 of the magnetic gear → the air gap between the high-speed rotor 50 of the magnetic gear and the low-speed rotor 60 of the magnetic gear → the fourth housing 501 in the high-speed rotor 50 of the magnetic gear → any second permanent magnet 502 in the high-speed rotor 50 of the magnetic gear.
With reference to fig. 1 and 4, in some embodiments, a first limiting member 104 is disposed on a circumferential surface of an end portion of the first housing 101 facing the magnetic gear fixing base 102, a second limiting member 105 is disposed on a second housing of the magnetic gear fixing base 102, and the first limiting member 104 abuts against the second limiting member 105 to determine a position between the first housing 101 and the second housing of the magnetic gear fixing base 102, so as to facilitate installation. In the present embodiment, the cross-sectional shapes of the first limiting member 104 and the second limiting member 105 are both annular, so as to facilitate the connection between the first limiting member 104 and the second limiting member 105.
Referring to FIG. 1, in some embodiments, the end of the second sleeve 1012 distal from the link 1013 is provided with a support 1014, the support 1014 being connected to the brake 80, and the fixed end of the brake 80 having been supported by the support 1014.
In some embodiments, the supporting member 1014 has a ring shape, that is, a through hole is formed in the middle of the supporting frame 1014, and the end of the motor shaft 20 is rotatably disposed in the through hole, so as to ensure smooth rotation of the motor shaft 20, and facilitate the end of the encoder 70 to be inserted into the through hole and connected to the motor shaft 20.
In some embodiments, the encoder 70 is disposed in the second sleeve 1012, the encoder 70 is connected to the motor shaft 20, and the encoder 70 is accommodated in the second sleeve 1012, so that the overall structure is more compact and the volume and weight of the product are reduced.
In some embodiments, the number of pole pairs of the second permanent magnet 502 of the magnetic gear high-speed rotor 50 is 4 or 5, the number of pole pairs of the magnetic adjusting ring core 602 of the magnetic gear low-speed rotor 60 is the sum of the number of pole pairs of the second permanent magnet 502 and the number of pole pairs of the third permanent magnet 1022 of the motor housing 10, and a transmission ratio can be defined so that the magnetic gear high-speed rotor 50 and the magnetic gear low-speed rotor 60 realize the function of a speed reducer.
Based on the same inventive concept, the present application further provides a vehicle, where the vehicle employs the in-wheel motor, and the specific structure of the in-wheel motor refers to the above embodiments, and since the in-wheel motor employs all technical solutions of all the above embodiments, at least all beneficial effects brought by the technical solutions of the above embodiments are achieved, and details are not repeated herein.
With reference to fig. 1, 2, 3, and 4, in some embodiments, a vehicle includes: a hub 90 and a tire 100. The hub 90 is connected to the hub motor, i.e.: the hub 90 is connected to the output end cap 604, and the tire 100 is sleeved on the hub 90.
In some embodiments, the motor stator 40 is conducted to generate a rotating magnetic field, the motor rotor 30 rotates, the motor rotor 30 drives the magnetic gear high-speed rotor 50 to rotate, the magnetic gear high-speed rotor 50 drives the magnetic gear low-speed rotor 60 to generate a low-speed high torque, the magnetic gear low-speed rotor 60 transmits power to the wheel hub 90 through the output end cover 604 to drive the outer wheel hub 90 to act, and the wheel hub 90 drives the tire 100 to rotate.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.
In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (18)
1. An in-wheel motor, comprising: the motor comprises a motor shell (10), a motor shaft (20), a motor rotor (30), a motor stator (40), a magnetic gear high-speed rotor (50), a magnetic gear low-speed rotor (60) and a brake (80);
the motor shaft (20), the motor rotor (30), the motor stator (40), the magnetic gear high-speed rotor (50) and the magnetic gear low-speed rotor (60) are all arranged in the motor shell (10);
the motor rotor (30) is sleeved on the motor stator (40);
the motor rotor (30) and the magnetic gear high-speed rotor (50) are arranged and connected along the axial direction of the motor shaft (20), the magnetic gear high-speed rotor (50) is sleeved on the motor shaft (20), a cavity is formed in the magnetic gear high-speed rotor (50), and the brake (80) is arranged in the cavity and connected with the motor shell (10) and the motor shaft (20);
the magnetic gear low-speed rotor (60) is sleeved on the magnetic gear high-speed rotor (50).
2. The in-wheel motor according to claim 1, characterized in that, the in-wheel motor further comprises an encoder (70), the encoder (70) is arranged through the motor housing (10) and connected with the motor shaft (20).
3. The in-wheel motor according to claim 1, further comprising a connecting part (110), wherein the motor rotor (30) and the magnetic gear high speed rotor (50) are connected through the connecting part (110), and wherein the inner diameter of the motor rotor (30) is larger than the inner diameter of the magnetic gear high speed rotor (50).
4. An in-wheel motor according to claim 3, characterized in that the connection part (110) is ring-shaped and perpendicular to the axial direction of the motor rotor (30).
5. The in-wheel motor according to any of claims 1-4, characterized in that the magnetic geared low speed rotor (60) comprises:
a magnetic adjusting ring fixing support (601);
and the magnetic adjusting ring cores (602) are arranged on the magnetic adjusting ring fixing support (601).
6. The in-wheel motor according to claim 5, characterized in that the motor housing (10) comprises a magnetic gear fixing seat (102), and the magnetic gear low-speed rotor (60) is rotatably arranged through the magnetic gear fixing seat (102).
7. The hub motor according to claim 6, wherein the magnetic gear fixing seat (102) comprises a second housing (1021) sleeved on the magnetic gear low-speed rotor (60), a plurality of third permanent magnets (1022) are arranged on an inner circumferential surface of the second housing (1021), and polarities of every two adjacent third permanent magnets (1022) are opposite.
8. The in-wheel motor according to claim 5, characterized in that the magnetic gear low-speed rotor (60) further comprises an output end cover (604) connected with the magnetic adjusting ring fixing bracket (601), and the output end cover (604) is rotatably arranged through the motor shell (10).
9. The electric machine of claim 8, wherein: a rotating hole is formed in the output end cover (604), and one end of the motor shaft (20) is rotatably arranged in the rotating hole.
10. The in-wheel motor according to any of claims 1-4, characterized in that the motor housing (10) comprises:
a first housing (101);
the magnetic gear fixing seat (102) is connected with the first shell (101), and the magnetic gear low-speed rotor (60) can rotatably penetrate through the magnetic gear fixing seat (102);
the motor stator (40) and the motor rotor (30) are arranged in the first shell (101), and the magnetic gear high-speed rotor (50) and the magnetic gear low-speed rotor (60) are arranged in the magnetic gear fixing seat (102).
11. The in-wheel motor according to claim 10, characterized in that the first housing (101) comprises:
a first sleeve (1011);
a second sleeve (1012) located within the first sleeve (1011);
a connector (1013) connected to ends of the first sleeve (1011) and the second sleeve (1012);
wherein the motor stator (40) is arranged between the first sleeve (1011) and the second sleeve (1012) and is positioned inside the connecting piece (1013).
12. The in-wheel motor of claim 11, wherein: the circumferential surface of the end part of the first shell (101) facing the magnetic gear fixing seat (102) is provided with a first limiting part (104), the magnetic gear fixing seat (102) is provided with a second limiting part (105), and the first limiting part (104) is abutted to the second limiting part (105).
13. The in-wheel motor according to claim 10, characterized in that an encoder (70) is arranged in the second sleeve (1012), and the encoder (70) is connected with the motor shaft (20).
14. An in-wheel motor according to claim 10, characterized in that the end of the second sleeve (1012) remote from the connection (1013) is provided with a support (1014), which support (1014) is connected to the brake (80).
15. The in-wheel motor according to claim 14, characterized in that the support member (1014) is provided with a through hole, and the end of the motor shaft (20) is rotatably arranged in the through hole.
16. The in-wheel motor according to any of claims 1-4, wherein: the number of pole pairs of a second permanent magnet (502) of the magnetic gear high-speed rotor (50) is 4 or 5, and the number of pole pairs of a magnetic adjusting ring core (602) of the magnetic gear low-speed rotor (60) is the sum of the number of pole pairs of the second permanent magnet (502) and the number of pole pairs of a third permanent magnet (1022) of the motor casing (10).
17. A vehicle comprising an in-wheel motor according to any of claims 1-16.
18. The vehicle of claim 17, characterized in that the vehicle comprises:
the wheel hub (10) is connected with the wheel hub motor;
the tire (100) is sleeved on the hub (90).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111665311.6A CN114337187A (en) | 2021-12-31 | 2021-12-31 | In-wheel motor and vehicle |
| PCT/CN2022/141843 WO2023125386A1 (en) | 2021-12-31 | 2022-12-26 | Hub motor and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111665311.6A CN114337187A (en) | 2021-12-31 | 2021-12-31 | In-wheel motor and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114337187A true CN114337187A (en) | 2022-04-12 |
Family
ID=81020301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111665311.6A Pending CN114337187A (en) | 2021-12-31 | 2021-12-31 | In-wheel motor and vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114337187A (en) |
| WO (1) | WO2023125386A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023125386A1 (en) * | 2021-12-31 | 2023-07-06 | 广东美的白色家电技术创新中心有限公司 | Hub motor and vehicle |
| WO2024113284A1 (en) * | 2022-11-30 | 2024-06-06 | 深圳市大疆创新科技有限公司 | Electric motor, gimbal and mobile platform |
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| KR101139552B1 (en) * | 2010-02-03 | 2012-04-27 | 엘지이노텍 주식회사 | Motor including transmission and control method of the same |
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| CN106972732B (en) * | 2017-05-23 | 2024-02-09 | 北京辐全智能科技股份有限公司 | Magnetic gear composite hub motor and automobile comprising same |
| CN114337187A (en) * | 2021-12-31 | 2022-04-12 | 广东美的白色家电技术创新中心有限公司 | In-wheel motor and vehicle |
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| CN106061835A (en) * | 2014-02-06 | 2016-10-26 | 纽芬兰纪念大学 | A magnetically geared electric drive |
| CN107070176A (en) * | 2017-05-16 | 2017-08-18 | 深圳市赫瑞科技有限公司 | A kind of magnetic gear |
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| WO2024113284A1 (en) * | 2022-11-30 | 2024-06-06 | 深圳市大疆创新科技有限公司 | Electric motor, gimbal and mobile platform |
Also Published As
| Publication number | Publication date |
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| WO2023125386A1 (en) | 2023-07-06 |
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Application publication date: 20220412 |