CN111224525A - Axial magnetic field in-wheel motor assembly - Google Patents

Axial magnetic field in-wheel motor assembly Download PDF

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Publication number
CN111224525A
CN111224525A CN202010174050.7A CN202010174050A CN111224525A CN 111224525 A CN111224525 A CN 111224525A CN 202010174050 A CN202010174050 A CN 202010174050A CN 111224525 A CN111224525 A CN 111224525A
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CN
China
Prior art keywords
stator
assembly
central shaft
motor
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010174050.7A
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Chinese (zh)
Inventor
陈龙生
赵峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Automotive Research Institute of Tsinghua University
Original Assignee
Suzhou Automotive Research Institute of Tsinghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Automotive Research Institute of Tsinghua University filed Critical Suzhou Automotive Research Institute of Tsinghua University
Priority to CN202010174050.7A priority Critical patent/CN111224525A/en
Publication of CN111224525A publication Critical patent/CN111224525A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/04—Machines with one rotor and two stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2793—Rotors axially facing stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • F16H2001/327—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear with orbital gear sets comprising an internally toothed ring gear

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention discloses an axial magnetic field hub motor assembly, which comprises: the central shaft, the rotor assembly and the stator assembly; the central shaft is arranged in the rotor frame in a penetrating way through a bearing, and the rotor frame is provided with a permanent magnet; a second stator component is fixedly sleeved on the central shaft; the central shaft is sleeved with a planet carrier; the planet carrier and the second stator component are respectively positioned at two sides of the rotor component; the planet carrier and the hub bearing are integrally arranged; the planet carrier is provided with a planet wheel; the sun wheel is sleeved on the central shaft through a bearing and is fixedly connected with the rotor frame; the central shaft passes through the hub bearing and is locked with the hub bearing; the central shaft is also sleeved with a first stator component and a stator back plate; the first stator assembly is fixedly connected with the stator back plate, and the stator back plate is sleeved on the gear ring and connected through a spline; the rotor assembly is connected with a rotating speed position sensor; and a hub bearing bolt is arranged on the hub bearing. The structure reduces the mass and size of the motor assembly and improves the torque density of the motor under the condition of outputting the same torque.

Description

Axial magnetic field in-wheel motor assembly
Technical Field
The invention relates to the field of axial flux motor structures, in particular to an axial magnetic field hub motor assembly.
Background
The existing pure electric vehicle basically adopts a centralized driving power system, namely a motor, a gearbox, a transmission shaft and the like, and needs a whole set of transmission mechanism. The hub motor is of a distributed driving structure, the motor is directly designed and installed inside the rim to directly drive the wheel, the structure is simple and reliable, and a traditional transmission system can be omitted.
The currently developed hub motors are all permanent magnet synchronous motors, and the permanent magnet synchronous motors have the advantages of simple torque control, wide speed regulation range and the like. However, the space inside the hub is limited and a braking system needs to be installed. If the hub motor adopts a direct-drive mode, the torque density of the hub motor is limited by the currently generally adopted scheme of the outer rotor permanent magnet synchronous motor, the axial length of the motor is increased by increasing the torque, and the internal space of the hub is occupied.
Disclosure of Invention
The invention aims to: the axial magnetic field hub motor assembly solves the problems that the radial and axial thicknesses of a conventional outer rotor permanent magnet synchronous motor are too large and the structural arrangement is unreasonable when a large torque is obtained.
The technical scheme of the invention is as follows: a double-stator and single-rotor axial magnetic field hub motor assembly comprises a central shaft, a motor shell, a stator component, a rotor component and a planet wheel speed reducer.
Two stator assemblies are sleeved on the central shaft, and a planetary wheel assembly and a rotor assembly are arranged between the two stator assemblies.
The first stator assembly includes a stator core having a wound winding and secured to the motor housing by a backing plate.
The planet wheel speed reducer is assembled in the shaft hole of the first stator assembly, the planet wheel speed reducer is assembled with the shaft hole of the back plate at the same time, and the shaft hole of the back plate and the outer side of the gear ring of the planet wheel speed reducer are positioned and installed through a spline and a key groove.
The planet wheel speed reducer comprises a planet carrier, the planet carrier and a hub bearing are integrally designed, and the hub bearing is sleeved on a central shaft and locked through a flange lock nut. The planet wheel is arranged on the planet carrier, the middle of the planet wheel is meshed with the sun wheel, the planet wheel is sleeved with the gear ring and is meshed with the gear ring, the sun wheel is sleeved on the central shaft through a bearing of an inner ring of the sun wheel, the planet wheel speed reducer is output through the planet carrier, and the sun wheel is fixed with a rotor frame in the rotor assembly.
A sealing oil seal is arranged between the hub bearing and the first stator assembly, and a certain number of hub bearing bolts are arranged on the hub bearing.
The rotor assembly comprises a rotor frame and permanent magnets arranged on the rotor frame, and the rotor frame is sleeved on the central shaft through a bearing.
The other side of the rotor component is provided with a second stator assembly which is sleeved on the central shaft and is fixedly connected with the central shaft, and the synchronous rotation effect is achieved.
The invention has the advantages that: the hub motor can be directly installed inside the rim, a universal interface is adopted for connection with the rim, and the installation position of an original vehicle brake disc is not changed. In addition, the structure adopts the axial magnetic field motor with speed reduction, so that the mass and the size of the motor assembly are reduced and the torque density of the motor is improved under the condition of outputting the same torque.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is an exploded view of an axial field in-wheel motor assembly;
wherein: 1. a central shaft; 2. a motor housing; 3. a motor end cover; 4. a first stator assembly; 5. a second stator assembly; 6. a stator back plate; 7. a planet carrier; 8. a hub bearing; 9. structural sealing; 10. a ring gear; 11. a permanent magnet; 12. a rotor frame; 13. a speed position sensor rotor; 14. a junction box.
Detailed Description
The preferred embodiment of the present invention:
an axial magnetic field hub motor assembly comprises a central shaft 1, a motor shell 2, a motor end cover 3, a stator assembly, a rotor assembly and a planet wheel speed reducer. A first stator assembly 4 and a second stator assembly 5 are nested on the central shaft, and a planetary wheel assembly and a rotor assembly are also provided between the two stator assemblies. Stator module, rotor subassembly, planet wheel reduction gear all integrate in motor casing 2, and overall structure is run through to center pin 1, and motor casing 2 cooperation motor end cover 3.
The first stator assembly 4 comprises a wound stator core, which is fixed to a stator back plate 6. The stator backplate 6 is fixed on the motor casing 2, and the stator backplate 6 and the motor casing 2 are positioned by a spigot.
The planet wheel speed reducer includes planet carrier 7, planet carrier 7 and the design of wheel hub bearing 8 integration, and wheel hub bearing 8 suit is on center pin 1 and lock through the flange lock mother.
An oil seal is mounted between the hub bearing 8 and the first stator assembly 4 for structural sealing 9.
The planet wheel is arranged on the planet carrier 7, the middle of the planet wheel is meshed with the sun wheel, the planet wheel is sleeved with the gear ring and is meshed with the gear ring 10, the sun wheel is sleeved on the central shaft through the bearing of the inner ring of the sun wheel, and the planet wheel speed reducer is output through the planet carrier 7.
The planet gear reducer is sleeved between the central shaft 1 and the first stator assembly 4, and a spline is arranged in a shaft hole of the stator back plate 6 and connected with a spline on the outer side of the gear ring 10 of the planet gear reducer.
The permanent magnet 11 is fixed to a rotor frame 12, the rotor frame 12 and a sun gear in a planetary reduction gear are fixed, and a speed position sensor rotor 13 is mounted on the rotor frame 12.
The second stator assembly 5 comprises a stator core for winding a winding, the stator core is fixed on another stator back plate, and the stator back plate is fixed on the motor end cover 3.
The motor end cover 3 is provided with a speed position sensor stator which corresponds to a speed position sensor rotor 13 arranged on the rotor frame 12 to form a rotating speed position sensor.
The motor end cover 3 is arranged on the central shaft 1 through a hollow spline, the central shaft 1 is connected with the rotor frame 12 through a bearing, and the central shaft 1 is connected with the sun gear through a bearing.
A junction box 14 is arranged on the motor shell 2, three phase lines and signal lines of the motor are connected out through the junction box 14, and the output of the hub motor is output through screws on a hub bearing.
To sum up, the advantage of this structure lies in:
1. a double-stator and single-rotor permanent magnet synchronous hub motor with a planetary gear speed reducer;
2. the planetary reducer gear ring is fixed on the unilateral stator back plate, the sun gear is fixed on the rotor and is output through the planet carrier;
3. the output planet carrier and the hub bearing are in an integrated design structure;
therefore, the axial magnetic flux hub motor with the same design boundary and the same size theoretically has higher output torque than the radial magnetic flux hub motor, and the scheme adds a planetary gear for speed reduction on the basis of the axial magnetic flux hub motor, so that larger torque can be obtained, and the torque density greatly exceeds that of the existing product. In addition, the thickness of the axial flux motor is generally smaller than that of the radial flux motor, which is more beneficial to the arrangement of the hub motor.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed herein be covered by the appended claims.

Claims (7)

1. An axial field in-wheel motor assembly comprising: the central shaft, the rotor assembly and the stator assembly; the method is characterized in that: the central shaft penetrates through the rotor frame through a bearing, and the rotor frame is provided with permanent magnets; a second stator component is fixedly sleeved on the central shaft; the central shaft is sleeved with a planet carrier through another bearing; the planet carrier and the second stator assembly are respectively positioned on two sides of the rotor assembly; the planet carrier and the hub bearing are integrally arranged; the planet carrier is provided with a planet wheel; the sun wheel is sleeved on the central shaft through a bearing and is fixedly connected with the rotor frame; the central shaft penetrates through the hub bearing and is locked with the hub bearing through a flange nut; the central shaft is also sleeved with a first stator component and a stator back plate; the first stator assembly is fixedly connected with the stator back plate, and the stator back plate is sleeved on the gear ring and connected through a spline; the rotor assembly is connected with a rotating speed position sensor; and a hub bearing bolt is arranged on the hub bearing.
2. The axial field in-wheel motor assembly of claim 1, wherein: the rotating speed position sensor comprises a stator part and a rotor part; the rotor part is fixed on the rotor frame, and the stator part is fixed on the motor end cover.
3. The axial field in-wheel motor assembly of claim 1, wherein: and a sealing oil seal is arranged between the hub bearing and the first stator assembly.
4. The axial field in-wheel motor assembly of claim 1, wherein: the motor comprises a motor shell and a motor end cover; and an outlet box is arranged on the motor shell, and a three-phase cable and a signal wire of the motor are connected out from the junction box.
5. The axial field in-wheel motor assembly of claim 1, wherein: the first stator assembly stage and second stator assembly each include: the stator comprises a stator core, a winding and a stator back plate; the winding is embedded and wound on the stator core, and the stator core is fixed on the stator back plate.
6. The axial field in-wheel motor assembly of claim 1, wherein: the axial magnetic field hub motor is a double-stator and single-rotor axial magnetic field hub motor integrated planetary gear reducer.
7. The axial field in-wheel motor assembly of claim 1, wherein the planet carrier and the hub bearing of the planetary gear reducer of the axial field in-wheel motor are integrally designed.
CN202010174050.7A 2020-03-13 2020-03-13 Axial magnetic field in-wheel motor assembly Pending CN111224525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010174050.7A CN111224525A (en) 2020-03-13 2020-03-13 Axial magnetic field in-wheel motor assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010174050.7A CN111224525A (en) 2020-03-13 2020-03-13 Axial magnetic field in-wheel motor assembly

Publications (1)

Publication Number Publication Date
CN111224525A true CN111224525A (en) 2020-06-02

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Application Number Title Priority Date Filing Date
CN202010174050.7A Pending CN111224525A (en) 2020-03-13 2020-03-13 Axial magnetic field in-wheel motor assembly

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114204750A (en) * 2022-01-11 2022-03-18 中磁动力设备(深圳)有限公司 In-wheel motor and assembling method thereof
GB2599592A (en) * 2021-01-29 2022-04-06 Univ Jiangsu Dual-rotor in-wheel motor based on axial magnetic field and control method thereof
CN114499091A (en) * 2022-02-14 2022-05-13 贵州航天林泉电机有限公司 Compact robot joint motor assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002356190A (en) * 2001-05-31 2002-12-10 Honda Motor Co Ltd Power-assisted bicycle
CN104742725A (en) * 2013-12-31 2015-07-01 中国科学院深圳先进技术研究院 Wheel hub driving device with planetary motors and wheel power system adopting wheel hub driving device
CN206559208U (en) * 2017-03-15 2017-10-13 江苏俊云机械科技有限公司 Double-stator conical permanent-magnet synchronous hub motor structure
CN108340768A (en) * 2018-04-09 2018-07-31 清华大学 A kind of electronic wheel assembly of integrated wheel hub motor
CN211959028U (en) * 2020-03-13 2020-11-17 清华大学苏州汽车研究院（吴江） Axial magnetic field in-wheel motor assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002356190A (en) * 2001-05-31 2002-12-10 Honda Motor Co Ltd Power-assisted bicycle
CN104742725A (en) * 2013-12-31 2015-07-01 中国科学院深圳先进技术研究院 Wheel hub driving device with planetary motors and wheel power system adopting wheel hub driving device
CN206559208U (en) * 2017-03-15 2017-10-13 江苏俊云机械科技有限公司 Double-stator conical permanent-magnet synchronous hub motor structure
CN108340768A (en) * 2018-04-09 2018-07-31 清华大学 A kind of electronic wheel assembly of integrated wheel hub motor
CN211959028U (en) * 2020-03-13 2020-11-17 清华大学苏州汽车研究院（吴江） Axial magnetic field in-wheel motor assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2599592A (en) * 2021-01-29 2022-04-06 Univ Jiangsu Dual-rotor in-wheel motor based on axial magnetic field and control method thereof
GB2599592B (en) * 2021-01-29 2023-05-03 Univ Jiangsu Dual-rotor in-wheel motor based on axial magnetic field and control method therefor
CN114204750A (en) * 2022-01-11 2022-03-18 中磁动力设备(深圳)有限公司 In-wheel motor and assembling method thereof
CN114204750B (en) * 2022-01-11 2023-08-08 中磁动力设备(深圳)有限公司 Hub motor and assembly method thereof
CN114499091A (en) * 2022-02-14 2022-05-13 贵州航天林泉电机有限公司 Compact robot joint motor assembly
CN114499091B (en) * 2022-02-14 2022-08-30 贵州航天林泉电机有限公司 Compact robot joint motor assembly

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