CN106712429A - Brushless high-speed mini motor - Google Patents
Brushless high-speed mini motor Download PDFInfo
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- CN106712429A CN106712429A CN201510774346.1A CN201510774346A CN106712429A CN 106712429 A CN106712429 A CN 106712429A CN 201510774346 A CN201510774346 A CN 201510774346A CN 106712429 A CN106712429 A CN 106712429A
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Abstract
The invention discloses a brushless high-speed mini motor, which belongs to a hub motor. The brushless high-speed mini motor is provided with a spindle (1); the spindle (1) is provided with a hub shell (3) through a bearing (2); the hub shell (3) is internally provided with a motor; the motor adopts an inner-stator outer-rotor structure; a stator (4) is fixed on the spindle (1); the rotor (5) is arranged on the spindle (1) through two bearings (6); a bush (7) sleeves the spindle (1) between the two bearings (6); a sun gear (9) sleeving the spindle (1) is fixed on the rotor (5); the sun gear (9) is engaged with a planetary gear (10); and the planetary gear (10) is engaged with an inner tooth ring (11) fixed on the hub shell (3). The brushless high-speed mini motor is characterized in that the planetary gear (10) is arranged on a planetary shaft (13) through a bearing (12); the planetary shaft (13) is fixed on a planetary gear fixing support (14); and the planetary gear fixing support (14) is fixed on the spindle (1). The brushless high-speed mini motor is particularly suitable for electric bicycles, and has the advantages of simple structure, high motor efficiency, few mechanical wear links, low noise and the like.
Description
Technical field
The present invention relates to a kind of automobile-used wheel hub motor of electrical salf-walking.
Background technology
Electric bicycle has the low advantage of comfortable, light, inexpensive, environmentally friendly, use cost, therefore it has gradually turned into the walking-replacing tool of many people by consumers in general receive, and it is motor therein to influence the critical component of electric bicycle driving performance.
Electric bicycle in the market, the overwhelming majority uses wheel hub motor.Its part includes main shaft, hub shell, motor part, clutch etc..It is rotated by motor part driven wheel hub, and then driving moment.From in terms of the structure of existing wheel hub motor, be broadly divided into brushless electric machine and brush motor, wherein have again high-speed electric expreess locomotive and slowspeed machine point.Brush motor uses mechanical commutation, and the technical requirements to control system are relatively low, and relative cost is less than brushless electric machine, and the starting torque of brush motor is slightly larger than brushless electric machine.But fatal weakness is：Short life, noise are big, efficiency is low.Its long-term use carbon brush abrasion is serious, more fragile.Abrasion simultaneously generates substantial amounts of carbon dust, and these dust are fallen in gear oil, accelerates gear oil dry, and noise of motor further increases.Brush motor uses by 1 year or so and is accomplished by changing interior carbon brush, and the mileage for once travelling that can find to charge when being bought not as good as new car 2/3rds, and be short of power during climbing, can also burn out controller.Because after motor changes carbon brush, commutator has also been ground with a groove, reduce carbon brush contact area, the carbon brush of loose contact can produce spark and accelerate to aoxidize commutator and copper sheet after being powered, cause above-mentioned bad phenomenon.And brushless electric machine replaces mechanical commutation with electronic commutation, brush motor is technically better than.Its efficiency in certain current range internal ratio brush motor efficiency high, and with small volume, noise is low the characteristics of.It can be said that brushless electric machine is the developing direction of electric bicycle from now on certainly.
The brushless electric machine that early stage is applied to electric bicycle is the electric wheel hub of the direct drive of decelerator-free, and its climbing capacity and Acceleration of starting ability are poor, and the resistance of electric wheel hub is larger when motor power-off rear vehicle is slided.Therefore, someone is improved it, such as disclosed in Chinese patent ZL 02219771.0 " DC brushless electric wheel hub ", it is additionally arranged decelerator in wheel hub, because decelerator amplifies motor torque, improves climbing and Acceleration of starting ability.
Although for brush motor, the characteristics of brushless electric machine has efficiency high, small volume, low noise, it still needs to further raising in the aspects such as electric efficiency, fixing fabric structure and noise control and not up to preferable effect.Such as：From structure, either brush motor or brushless electric machine, wheel hub motor in the market is equipped with one-way clutch, think the essential element that clutch is wheel hub motor, but, on the one hand the presence of clutch increased the link of mechanical wear, this certainly will reduce whole motor ground efficiency, on the other hand, the frequent operation of clutch is also inevitable unnecessarily to consume the Partial Power of motor, so that the efficiency of wheel hub motor is reduced, furthermore, clutch may cause failure due to mechanical wear, so as to increase the link that whole wheel hub motor produces failure.For another example：Because brushless electric machine uses the default minor structure of outer rotor, its rotor is arranged on main shaft by two bearings, therefore bushing is cased between the two bearings on main shaft, to prevent bearing inner race from deforming, but, when the presence of the bushing makes motor work, the noise of bang bang is produced due to friction and collision between bushing and bearing and between bushing and main shaft, and the problem rides time lengthening and obvious all the more with electric bicycle, this had both allowed the people that rides to feel under the weather, and easily caused consumer to the suspection of motor quality.
The content of the invention
The technical problems to be solved by the invention are directed to above-mentioned state of the art and provide that a kind of electric efficiency is high, the more simple mini motor of brushless high speed of structure.
Another technical problem to be solved by this invention is directed to above-mentioned state of the art and further provides for a kind of noise mini motor of lower brushless high speed.
The present invention solves the technical scheme taken of above-mentioned technical problem：The mini motor of the brushless high speed, it has main shaft, hub shell is provided with by bearing on main shaft, motor is installed in hub shell, motor uses inner stator outer-rotor structure, stator is fixed on main shaft, and rotor is then held on main shaft by two gear shafts, on main shaft bushing is cased between the two bearings, the central gear being enclosed within main shaft is fixed with rotor, central gear is engaged with planetary gear, planetary gear is engaged with the internal gear being fixed on hub shell, it is characterized in that described planetary gear is arranged in planet axis by bearing, planet axis are fixed on planetary gear fixed support, and planetary gear fixed support is then fixed on main shaft.
The bushing is tightened and is cased with rubbery loop.
The outer ring of the rubbery loop is against on the inwall of the rotor.
The planetary gear is nylon straight-tooth gear.
The inner ring of the nylon straight-tooth gear is tightly embedded with the gear iron inserts of ring-type, and the gear iron inserts close-fitting is on the bearing.
We pass through to study discovery, cancel clutch and normal use of electric bicycle is not adversely influenced substantially.After cancelling clutch, simply slightly increase resistance when promoting electric bicycle to retreat, but, electric bicycle is promoted to retreat the ratio occurred in the normal use of electric bicycle extremely low, typically occur over just the situation that electric bicycle is released from parking stall, and the distance of required implementation is extremely short, typically less than 2 meters.The setting for thus cancelling clutch is entirely feasible, the essential element of its not wheel hub motor.
Compared with prior art, the advantage of the invention is that：1st, the mini motor of brushless high speed of the present invention eliminates clutch, thus wheel hub motor is when rotary work, hub shell by clutch without being driven, but directly rotate wheel hub by planetary gear drive internal gear, so as to reduce consumption during using clutch because of the mechanical wear of clutch and the frequent operation of clutch to power of motor, the efficiency of wheel hub motor is improve, efficiency can improve about 3%, and normally using for electric bicycle is not adversely affected substantially；2nd, no-clutch of the present invention, and clutch may cause failure due to mechanical wear, therefore The present invention reduces the link that whole wheel hub motor produces failure.3rd, invention increases rubber lasso, its position that on the one hand can be relatively fixed bushing, make to be kept between bushing and main shaft certain gap, so as to the friction and collision that reduce bushing and between the bearing at the bushing two ends and between bushing and main shaft, thus reduce noise；On the other hand, though bushing and be there occurs between the bearing at the bushing two ends and between bushing and main shaft friction or collide, also make the noise of generation almost in nothing because of the sound deadening that the rubber lasso has；Also, the both sides effect substantially will not because electric bicycle ride the time extension cut down such that it is able to ensure that wheel hub motor is long-lasting in terms of noise control.
Brief description of the drawings
Fig. 1 is the cross section structure diagram of the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to embodiments.
As shown in figure 1, being a preferred embodiment of the invention.As shown in figure 1, the mini motor of brushless high speed described in the present embodiment, it has main shaft 1, and holding 2 by two gear shafts on main shaft 1 is provided with hub shell 3.Hub shell 3 is made up of hub shell 301 and wheel hub end housing 302.Motor is installed, motor uses inner stator outer-rotor structure in hub shell 3.Stator 4 is made up of stator fixed mount 401, stator punching 402, armature winding 403 etc..Rotor 5 is made up of rotor case 501, magnet steel 502, rotor fixed mount 503 etc..Stator 4 is fixed on main shaft 1, and rotor 5 then holds 6 and is arranged on main shaft 1 by two gear shafts, and bushing 7 is cased between the two bearings 6 on main shaft 1.Bushing 7 is tightened and is cased with rubbery loop 8, and the outer ring of the rubbery loop 8 is against on the inwall of rotor 5.The central gear 9 being enclosed within main shaft 1 is fixed with rotor 5, central gear 9 is engaged with three planetary gears 10.Planetary gear 10 is engaged with the internal gear 11 being fixed on hub shell 3, and planetary gear 10 is arranged in planet axis 13 by bearing 12, and planet axis 13 are fixed on planetary gear fixed support 14, and planetary gear fixed support 14 is then fixed on main shaft 1.The planetary gear 10 is nylon straight-tooth gear, and the inner ring of the nylon straight-tooth gear is tightly embedded with the gear iron inserts 1001 of ring-type, the gear iron inserts 1001 then close-fitting on bearing 12.
Claims (5)
1. the mini motor of a kind of brushless high speed,It has main shaft (1),Hub shell (3) is provided with by bearing (2) on main shaft (1),Motor is installed in hub shell (3),Motor uses inner stator outer-rotor structure,Stator (4) is fixed on main shaft (1),And rotor (5) then holds (6) on main shaft (1) by two gear shafts,On main shaft (1) bushing (7) is cased between the two bearings (6),The central gear (9) being enclosed within main shaft (1) is fixed with rotor (5),Central gear (9) is engaged with planetary gear (10),Planetary gear (10) is engaged with the internal gear (11) being fixed on hub shell (3),It is characterized in that described planetary gear (10) by bearing (12) in planet axis (13),Planet axis (13) are fixed on planetary gear fixed support (14),And planetary gear fixed support (14) is then fixed on main shaft (1).
2. the mini motor of brushless high speed according to claim 1, it is characterised in that the bushing (7) tightens and is cased with rubbery loop (8).
3. the mini motor of brushless high speed according to claim 2, it is characterised in that the outer ring of the rubbery loop (8) is against on the inwall of the rotor (5).
4. the mini motor of brushless high speed according to claim 1 or 2 or 3, it is characterised in that the planetary gear (10) is nylon straight-tooth gear.
5. the mini motor of brushless high speed according to claim 4, it is characterized in that the inner ring of the nylon straight-tooth gear is tightly embedded with gear iron inserts (1001) of ring-type, gear iron inserts (1001) close-fitting is on the bearing (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510774346.1A CN106712429A (en) | 2015-11-14 | 2015-11-14 | Brushless high-speed mini motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510774346.1A CN106712429A (en) | 2015-11-14 | 2015-11-14 | Brushless high-speed mini motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106712429A true CN106712429A (en) | 2017-05-24 |
Family
ID=58922966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510774346.1A Withdrawn CN106712429A (en) | 2015-11-14 | 2015-11-14 | Brushless high-speed mini motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106712429A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI770780B (en) * | 2021-01-21 | 2022-07-11 | 新加坡商普拉希斯國際有限公司 | Inner rotor hub motor |
-
2015
- 2015-11-14 CN CN201510774346.1A patent/CN106712429A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI770780B (en) * | 2021-01-21 | 2022-07-11 | 新加坡商普拉希斯國際有限公司 | Inner rotor hub motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170524 |