CN112803659B - Stator rotating disc type hub motor for electric bicycle - Google Patents

Stator rotating disc type hub motor for electric bicycle Download PDF

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Publication number
CN112803659B
CN112803659B CN202110196360.3A CN202110196360A CN112803659B CN 112803659 B CN112803659 B CN 112803659B CN 202110196360 A CN202110196360 A CN 202110196360A CN 112803659 B CN112803659 B CN 112803659B
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Prior art keywords
motor
hub
stator
wheel
spoke
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CN202110196360.3A
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CN112803659A (en
Inventor
崔晓宏
王晓远
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Suzhou Noahs Electric Bicycles Co ltd
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Suzhou Noahs Electric Bicycles Co ltd
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    • 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
    • H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
    • B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
    • B62M11/18—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears with a plurality of planetary gear units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M7/00—Motorcycles characterised by position of motor or engine
    • B62M7/12—Motorcycles characterised by position of motor or engine with the engine beside or within the driven wheel
    • 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
    • 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
    • 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
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/005—Machines with only rotors, e.g. counter-rotating rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/47—Air-gap windings, i.e. iron-free windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • 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

Abstract

The invention discloses a stator rotating disc type hub motor for an electric bicycle, which comprises a disc type motor, a rim, spokes, a pinion and a large gear ring. The disc type motor stator and the wheel rotate synchronously, the rotor and the wheel rotate reversely, and the planetary gear linkage shaft penetrates through the gap of the spoke to be meshed with a large gear ring fixed on the outer side of the spoke. The disc motor stator is part of a hub. The magnetic yoke pasted with the permanent magnet is directly exposed in the air for installation. The technical scheme of the stator rotating type hub motor adopted by the invention ensures that the weight of the hub motor is less than 1 kilogram and is only half of the weight of the industry.

Description

Stator rotating disc type hub motor for electric bicycle
Technical Field
The invention relates to the field of electric bicycles, in particular to a stator rotary hub motor.
Background
The hub type motor adopts the technology of a motor arranged in a wheel, and integrates power, transmission and braking devices on a hub, and in the prior art, the hub motor commonly used for the electric bicycle has heavy low speed, high speed toothed motors and light weight which is more than 1 kilogram. The common hub motors are all sealed, the permanent magnet, the armature and the gear are all sealed in a hub shell, the hub is heated seriously, the permanent magnet is afraid of high temperature to cause irreversible demagnetization, and the price of the permanent magnet is more expensive when the permanent magnet is more high-temperature resistant.
The electric bicycle demanded by the market is light and is a product characteristic, and the light weight means high efficiency.
Disclosure of Invention
The invention has the technical scheme that a high-speed disc type brushless coreless motor is arranged in a wheel hub, and the high-speed disc type brushless coreless motor is a stator rotating disc type motor for an electric bicycle. The hub shell of the bicycle is manufactured in two sections, and one side of the hub shell is used as a planetary gear carrier; the other side is used as a shell of the disc type motor, the two sides of the hub are respectively connected with the rim through spokes, and the two sections of hubs are assembled into a hub with complete function. The housing of the disc motor serves as a hub.
The disc type motor stator and the wheel rotate synchronously, and the rotor and the wheel rotate reversely. The rotor has a sun gear, i.e., a pinion, mounted thereon. The pinion gear meshes with the planetary gear. The linkage shaft on the planetary gear penetrates through the gap of the spoke to be meshed with a large gear ring fixed on the outer side of the spoke. Three planetary gears are arranged.
The technical scheme forms a planetary speed reducer, the rotating speed of a motor is more than 4000 revolutions, and after the motor is subjected to primary speed reduction in a spoke space, the motor is meshed with a planetary gear through a large gear ring fixed on the outer side of a spoke to form secondary speed reduction. The second-stage speed reducer is arranged between the frame (8) and the spokes (12).
The big gear ring is of an internal gear type and is fixed on the wheel shaft to be connected with the frame, so that the speed reduction efficiency is high.
The magnetic yoke rotor with the permanent magnet stuck on the disc motor is directly exposed in the air for installation, and can directly dissipate heat by utilizing the air flow of the vehicle in the process of running.
The technical scheme forms a planetary two-stage speed reducer, and the rotating speed of the motor is more than 4000 revolutions due to the adoption of the high-speed disc type brushless coreless motor, so that the efficiency reaches 90 percent, and the using amount of 10 lithium batteries can be saved.
In the prior art, a speed ratio formula of a planetary reducer is as follows:
Figure 841420DEST_PATH_IMAGE001
the invention is actually a stator-free motor structure, and the stator of the stator-free motor structure reversely rotates relative to the rotor, so that a new formula of the reduction ratio of the stator rotary hub motor is obtained:
Figure DEST_PATH_IMAGE001
the "1" in the original formula becomes "2". Because the stator rotates reversely relative to the rotor, the rotating speed of one wheel is additionally increased, so that the speed reduction ratio is improved, the rotating speed of the motor is improved, the efficiency of the motor is also improved, and the weight of the motor is reduced.
The effective conductors of the armature winding of the disk type motor are radially distributed in space, so that the more the idle sector areas of the winding are at the position closer to the outer diameter, the more the spare space is used inside and outside the permanent magnet ring. The stator without iron core structure is made up by encapsulating coil in insulating material, pressing into disk shape and making into stator winding disk without iron core.
The outer end edge of the coil is exposed outside beyond the stator sleeve, and the air outside the motor is used for heat dissipation. The armature and the stator sleeve are packaged together to form an armature stator disc without an iron core, and the stator sleeve is fixed with the shell.
Furthermore, each winding conductor is extended straight and extended to pass through the outer circle of the stator sleeve and is connected outside the shell. The welding, series connection and parallel connection processes of the conductors outside the shell are simple, the operation is easy, and the production cost is reduced.
Further, the outer end edge of the armature coil is encapsulated on the stator sleeve.
The motor lead is led in through the shaft core and is electrically connected with the motor through the collecting ring.
The technical scheme of the stator rotating type hub motor adopted by the invention ensures that the weight of the hub motor is less than 1 kilogram and is only half of the weight of the industry.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a schematic cross-sectional view of a hub plate motor for an electric bicycle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the hub motor for an electric bicycle according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of the hub motor of a second embodiment of the present invention;
wherein: 1. a wheel axle; 2. a housing; 3. a disc motor; 4. a pinion gear; 5. a large gear ring; 6. a planetary gear; 7. a flower drum; 8. a frame; 9. a coil end edge; 10. a magnetic yoke; 11. a rim; 12. spokes; 13. a ratchet wheel; 14. a stator sleeve; 15. a collector ring; 16. a wire; 17. and a permanent magnet.
The specific implementation method comprises the following steps:
the first embodiment is as follows: as shown in FIGS. 1-2, the hub shell of the stator rotating disk type motor for an electric bicycle of the present invention is manufactured in two stages, and one side of the hub shell is used as a planetary gear carrier; the other side is used as a shell of the disc type motor, and the two sides of the hub are respectively connected with the rim through spokes. The housing of the disc motor serves as a hub.
The rotor has a sun gear, i.e., a pinion, mounted thereon. The pinion gear meshes with the planetary gear. The planet gear carrier is one end of the hub, and the linkage shaft passes through and is meshed with a large gear ring fixed on the outer side of the spoke.
A disc type motor (3) is arranged in a wrapping space of a spoke (12) of the hub, and reduction gears are arranged inside and outside the spoke. The stator of the disc type motor (3) rotates synchronously with the wheel, and the rotor and the wheel rotate reversely.
The large gear ring (5) is of an internal gear type and is fixed on the wheel shaft (1) to be connected with the frame (8).
Three planetary gears are uniformly distributed, and small gears of the planetary gears are arranged outside spoke spaces and are meshed with a large gear ring (5); the big gear of the planetary gear is arranged in the spoke space and meshed with the small gear on the motor rotor. The pinion is a planetary reduction sun gear.
Furthermore, the outer end edge (9) of the winding coil is exposed outside beyond the stator sleeve (14).
The magnetic yoke (10) of the disc type motor, which is pasted with the permanent magnet (17), is directly exposed in the air for installation.
In the second embodiment, the stator rotating disk type hub motor for the electric bicycle is provided. The rim (11) adopts a small wheel diameter, and spokes are omitted. The disc type motor (3) is characterized in that the stator and the shell (2) are fixed with the rim (11), the motor shell is a hub, and the stator and the rim synchronously rotate; the rotor and the wheel rotate in opposite directions, and the planet gear (6) is meshed with the large gear ring (5).
The large gear ring (5) is fixed on the wheel shaft and is fixedly connected with the frame.
Furthermore, the outer end edge (9) of the winding coil is exposed outside beyond the stator sleeve (14).
The magnetic yoke (10) of the disc type motor, which is pasted with the permanent magnet (17), is directly exposed in the air for installation.

Claims (5)

1. The utility model provides a rotatory disk in-wheel motor of stator for electric bicycle, includes disk motor (3), rim (11), spoke (12), pinion (4), bull gear (5), its characterized in that: the disc type motor (3) has a stator rotating synchronously with the wheel, a rotor rotating reversely with the wheel, a sun gear, namely a pinion, mounted on the rotor, the pinion is meshed with a planetary gear, a linkage shaft of the planetary gear (6) passes through a gap of a spoke (12) to be meshed with a large gear ring (5) fixed on the outer side of the spoke, and after primary speed reduction in a spoke space, the linkage shaft is meshed with the planetary gear through the large gear ring fixed on the outer side of the spoke to form secondary speed reduction; the two-stage speed reduction device is arranged between the frame (8) and the spokes (12), two sides of the hub are respectively connected with the rim through the spokes, and one side of the hub shell is used as a planet gear carrier.
2. The in-wheel motor as claimed in claim 1, wherein: the hub motor large gear ring (5) is of an internal gear type.
3. The in-wheel motor as claimed in claim 1, wherein: the hub motor large gear ring (5) is fixed on the wheel shaft (1) and connected with the frame (8).
4. The in-wheel motor as claimed in claim 1, wherein: the hub motor hub shell is manufactured in two sections, and the other side of the hub motor hub shell is used as a shell of the disc motor.
5. The in-wheel motor as claimed in claim 1, wherein: the outer end edge (9) of the winding coil of the hub motor is exposed outside beyond the stator sleeve, and the air outside the motor is used for heat dissipation.
CN202110196360.3A 2021-02-22 2021-02-22 Stator rotating disc type hub motor for electric bicycle Active CN112803659B (en)

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Application Number Priority Date Filing Date Title
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CN112803659B true CN112803659B (en) 2022-03-04

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113580922A (en) * 2021-08-27 2021-11-02 上海盘毂动力科技股份有限公司 Hub driving integrated device
DE102021131055B3 (en) * 2021-11-26 2022-10-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Drive-brake assembly for one wheel and electric bicycle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200954847Y (en) * 2006-09-21 2007-10-03 徐亮良 Wheel-type vehicle generating device
CN101364759A (en) * 2008-10-06 2009-02-11 丁行 Double rotor planet differential electricity generator
CN205220977U (en) * 2015-12-17 2016-05-11 深圳一哥智行科技有限公司 Electrical bicycle hub
CN205566049U (en) * 2016-03-24 2016-09-07 李勇 It is reciprocal to bilateral permanent magnetism disk hydroelectric generator of birotor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200954847Y (en) * 2006-09-21 2007-10-03 徐亮良 Wheel-type vehicle generating device
CN101364759A (en) * 2008-10-06 2009-02-11 丁行 Double rotor planet differential electricity generator
CN205220977U (en) * 2015-12-17 2016-05-11 深圳一哥智行科技有限公司 Electrical bicycle hub
CN205566049U (en) * 2016-03-24 2016-09-07 李勇 It is reciprocal to bilateral permanent magnetism disk hydroelectric generator of birotor

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