CN105939079B - The ventilation and heat structure of hub motor for electric automobile - Google Patents
The ventilation and heat structure of hub motor for electric automobile Download PDFInfo
- Publication number
- CN105939079B CN105939079B CN201610421341.5A CN201610421341A CN105939079B CN 105939079 B CN105939079 B CN 105939079B CN 201610421341 A CN201610421341 A CN 201610421341A CN 105939079 B CN105939079 B CN 105939079B
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- Prior art keywords
- air
- wheel hub
- motor
- hub motor
- end cap
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
-
- 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
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- 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
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The invention discloses a kind of ventilation and heat structure of hub motor for electric automobile, wheel hub motor end cap is provided with left and right sides of wheel hub motor, clutch shaft bearing is provided between motor shaft and left side wheel hub electric motor end cap, sealing structure is provided between wheel hub motor end cap and outer rotor, motor shaft, motor shaft is provided with the air channel of inside and outside two layers of concentric circles, internal layer air channel is air intake passage, outer layer air channel is air-out passage, air intake passage and air-out passage one end connect with wheel hub motor inner chamber, and air intake passage and the air-out passage other end connect air inlet and air outlet respectively.The present invention makes air-flow smooth flow inside the wheel hub motor of sealing take away heat, the thermal diffusivity and water proofing property of wheel hub motor system are taken into account, the structure is cleverly transformed on the premise of original hub motor structure is not influenceed, good forced ventilation radiating effect can be achieved, the security during electric automobile during traveling is ensure that, while has taken into account the compactedness of electric machine structure and the economy of manufacturing cost.
Description
Present patent application is invention and created name " a kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile "
Divisional application, applying date of original application is on October 11st, 2014, Application No. 2014105353103.
Technical field
The present invention relates to electric automobile, more particularly to electric automobile hub.
Background technology
Wheel hub motor is a kind of inner stator, the motor of outer rotor form, and its power, transmission and brake apparatus are all incorporated into wheel
In hub, therefore the mechanical part of electric vehicle is greatly simplified.Heating in the motor course of work comes from winding damage unshakable in one's determination
Consumption, the size of caloric value is mainly relevant with stator current, while indirectly relevant with power output and output torque.Work as wheel hub motor
When the electric automobile of driving is in heavy duty, climbing or anxious acceleration, motor needs larger electric current to be turned round to provide larger output
Square, more heat can be produced in machine winding and iron core in a short time, raise winding temperature.But motor work has
Certain temperature limiting, the class of insulation of winding limit the temperature upper limit of motor internal.The higher temperature of motor internal makes electricity
The efficiency of machine substantially reduces, once exceeding the temperature upper limit, the winding insulation of motor will be impaired, cause machine winding turn-to-turn short circuit
Even blow.In addition, the easy loss of excitation at high temperature of permanent magnet magnet steel inside wheel hub motor, after temperature exceedes curie point, permanent magnetism
The magnetic of body can not be recovered completely, influence the output and efficiency of motor.
In order that wheel hub motor can at a temperature of permission normal work, generally have following several processing modes：When
The larger model of rated power is selected, there is required power when the rated power of such motor is relative to electric automobile nominal situation
Larger redundancy, it can meet to require by natural heat dissipation when motor works, but this method is in the side such as economy and space utilization
Face is not reasonable；Second, area of dissipation is increased by the fin installed on wheel hub motor end cap, in a manner of natural heat dissipation
Caused heat in rapid dispersion motor operation, this method has been mentioned in patent of invention CN201310756432.0, but this kind
The radiating effect of mode depends on size, surface area and the gravity-flow ventilation condition of fin, and usual heat-sinking capability is limited；It is another
Method is to use forced heat radiation technology, including the modes such as air-cooled and liquid is cold.Generally use air blast cooling, i.e., installed in motor internal
Fan, motor internal is set to form cross-ventilation with outside, heat can be discharged to outside motor in time.Radiate and tie for identical
Structure, the radiating effect of air blast cooling will be significantly better than natural heat dissipation.On the other hand, it is contemplated that be likely encountered in vehicle travel process
Ponding and sleety weather, wheel hub motor require good sealing, to prevent water penetrates into motor internal from destroying winding insulation,
Electric short circuit and chemical attack are caused, but current air-cooled heat dissipation structure there is no method to solve the requirement of the sealing, the above two
The requirement of aspect is contradiction, annoyings those skilled in the art always.
The content of the invention
The technical problems to be solved by the invention are just to provide a kind of ventilation and heat structure of hub motor for electric automobile, both
Maintain the water-proof sealing of wheel hub, and can realizes air blast cooling to meet cooling requirements during the high-power operation of motor, it is ensured that
Security during electric automobile during traveling, while taken into account the compactedness of electric machine structure and the economy of manufacturing cost.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：The ventilation and heat of hub motor for electric automobile
Structure, including outer rotor and inner stator, the outer rotor are located at inner stator outer circumferential sides, and the inner stator is installed on motor shaft
On, wheel hub motor end cap is provided with left and right sides of wheel hub motor, the wheel hub motor end cap is fixed with outer rotor, the motor shaft
Clutch shaft bearing is provided between the wheel hub electric motor end cap of left side, the second axle is provided between the motor shaft and right side wheel hub electric motor end cap
Hold, sealing structure is provided between the wheel hub motor end cap and outer rotor, motor shaft, the motor shaft is concentric provided with inside and outside two layers
Round air channel, internal layer air channel are air intake passage, and outer layer air channel is air-out passage, described air intake passage and air-out passage one end and wheel
Hub motor cavity connects, and air intake passage and the air-out passage other end connects air inlet and air outlet, the air inlet respectively
It is located at outside vehicle with air outlet to paddle more than altitude line and be provided with waterproof and dustproof structure, the motor shaft includes motor shaft sheet
Body, the motor shaft body center hollow form described internal layer air intake passage, between motor shaft and the wheel hub motor end cap
Provided with axle sleeve, described outer layer air-out passage, the inner stator excircle are formed between the axle sleeve and the motor shaft body
The cavity that ventilation gap connects wheel hub motor inner stator, outer rotor is provided between wall and outer rotor inner peripheral wall, the air intake leads to
Road end connects with wheel hub motor inner stator cavity, and the clutch shaft bearing makes Wheel hub motor external rotor cavity using ventilation bearing
Connected with air-out passage, the right-hand member of the motor shaft body is circumferentially set in the circumferential wall between second bearing and stator core
There is air vent, the axle sleeve is provided with blade or air channel structure, the blade in the gap between clutch shaft bearing and air-out passage
Or air channel structure is driven by wheel hub and rotated.
Preferably, the air outlet is provided with force ventilated fan.
The present invention is using double-deck axle aeration structure inside and outside a kind of sealing being isolated from the outside, the wheel hub motor with particular design
End cap is engaged, in addition to air inlet/outlet passage, the closing of wheel hub motor inner sealing, and wind inlet channel, wheel hub motor inner stator chamber, wheel hub
Ventilation gap, Wheel hub motor external rotor chamber between electric machine rotor, outer bearing air channel, exhaust air flue collectively constitute an air
Path, air enters wheel hub motor inner chamber from the air inlet being connected with wind inlet channel, by the stator winding and iron core of motor
When, take away heat and discharged from the air outlet of exhaust air flue, so as to realize the effect of radiating.
To sum up, the present invention makes air-flow smooth flow inside the wheel hub motor of sealing take away heat, has taken into account wheel hub motor
The thermal diffusivity and water proofing property of system, the structure are cleverly transformed on the premise of original hub motor structure is not influenceed, both
Good forced ventilation radiating effect can be achieved, it is ensured that the security during electric automobile during traveling, while taken into account motor
The compactedness of structure and the economy of manufacturing cost.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and detailed description：
Fig. 1 is the waterproof air-cooled heat dissipation structure cross-sectional view of hub motor for electric automobile；
The waterproof air-cooled heat dissipation structure air circulation schematic diagram of Fig. 2 hub motor for electric automobile.
Embodiment
As depicted in figs. 1 and 2, the waterproof air-cooled heat dissipation structure of a kind of hub motor for electric automobile, including outer rotor 2 and interior
Stator 1, the inner stator 1 are formed by silicon steel sheet closed assembly, and three-phase windings are embedded in stator slot.The outer rotor 2 is located at inner stator 1
Outer circumferential sides, the inner side of outer rotor 2 uniformly embed permanent magnet magnet steel.The inner stator 1 is installed on motor shaft 4, in wheel hub
Motor axial direction both sides are provided with wheel hub motor end cap 3, including left side wheel hub electric motor end cap and right side wheel hub electric motor end cap, the wheel hub
Electric motor end cap 3 is fixed with outer rotor 2, and clutch shaft bearing, the motor are provided between the motor shaft 4 and left side wheel hub electric motor end cap
Second bearing is provided between axle and right side wheel hub electric motor end cap, the motor shaft other end is connected with vehicle hanging mechanism.
Sealing structure is provided between the wheel hub motor end cap 3 and outer rotor and motor shaft 4, in outer rotor and both sides wheel hub
The wheel hub motor inner chamber of closing is formed between electric motor end cap.On the one hand right side wheel hub electric motor end cap completely encloses motor wheel hub, separately
On the one hand in addition to clutch shaft bearing, left side wheel hub electric motor end cap also closes motor wheel hub, and the ventilation left behind on clutch shaft bearing dissipates
The passage of heat connects with the cavity in motor wheel hub.The motor shaft is provided with the air channel of inside and outside two layers of concentric circles, internal layer air channel be into
Wind passage 5, outer layer air channel are air-out passage 6, and hub end and the wheel hub motor inner chamber of the air intake passage 5 and air-out passage 6 connect
Logical, the other end of the air intake passage and air-out passage connects air inlet and air outlet, air inlet and the air outlet position respectively
Paddled more than altitude line in outside vehicle and be provided with waterproof and dustproof structure.Because wheel hub motor inner chamber seals on the whole, only
The wind-cooling heat dissipating passage of setting can connect with wheel hub motor inner chamber, even and air intake passage and air-out passage be also provided with phase
The water proof and dust proof construction answered, so as to ensure that overall water proofing property.
The motor shaft 4 includes motor shaft body, and motor shaft body inner tubal wall is fixedly connected with stator core, and outer tube wall is set
There is flange to be fixed with wheel hub motor end cap.The motor shaft body center hollow forms described internal layer wind inlet channel, the electricity
Axle sleeve is arranged between arbor and wheel hub motor end cap, described outer layer is formed between the axle sleeve and the motor shaft body and is gone out
Wind passage.
Between the inner stator outer circle wall and outer rotor inner peripheral wall wheel hub motor medial and lateral are connected provided with ventilation gap
Cavity, the air intake passage end connect with wheel hub motor inner chambers, and the clutch shaft bearing makes wheel hub electric using ventilation bearing
Cavity connects with air-out passage on the outside of machine.
The hub end of the motor shaft body, circumferentially arranged with logical in the circumferential wall between second bearing and stator core
Air holes.The axle sleeve is provided with blade or air channel structure 7, the blade or wind in the gap between clutch shaft bearing and exhaust air flue
Road structure 7 is driven by wheel hub and rotated, and wherein air channel structure can use helical structure, to promote the flowing of air-flow, it is described go out
Air port is provided with force ventilated fan.
In hub motor for electric automobile involved in the present invention, wind inlet channel, wheel hub motor inner chambers, wheel hub motor
Cavity, clutch shaft bearing air channel, exhaust air flue collectively constitute an air and led on the outside of ventilation gap, wheel hub motor between rotor
Road, air enter wheel hub motor inner chamber from the air inlet being connected with wind inlet channel, by motor stator winding and it is unshakable in one's determination when,
Take away heat and discharged from the air outlet of exhaust air flue, so as to realize the effect of radiating.
In order to enable air to flow, it is necessary to apply suction in the duct along air flue.During high vehicle speeds, rotation
Outer wheel hub drives the blade or air channel structure synchronous rotary on the outside of clutch shaft bearing, hot-air is extracted out from wheel hub motor inner chamber, warp
Exhaust air flue is transported to air outlet, and the motor internal sealed is due to producing negative pressure, the air relatively low from air inlet inlet temperature,
Winding and iron core are further cooled down, is so gone round and begun again.
On the other hand, it is contemplated that the rotating speed of wheel is relatively low when vehicle low-speed heave-load is climbed, and air mass flow deficiency, can now make
The fan of air outlet, which is powered to rotating, produces suction, forces air to be flowed in air channel, to strengthen radiating effect.
Claims (2)
1. the ventilation and heat structure of hub motor for electric automobile, including outer rotor and inner stator, the outer rotor is located at inner stator
Outer circumferential sides, the inner stator are installed on motor shaft, and wheel hub motor end cap, the wheel hub are provided with left and right sides of wheel hub motor
Electric motor end cap is fixed with outer rotor, and clutch shaft bearing, the motor shaft are provided between the motor shaft and left side wheel hub electric motor end cap
Second bearing is provided between the wheel hub electric motor end cap of right side, it is characterised in that：The wheel hub motor end cap and outer rotor, motor shaft
Between be provided with sealing structure, the motor shaft is provided with the air channel of inside and outside two layers of concentric circles, and internal layer air channel is air intake passage, outer layer wind
Road is air-out passage, and described air intake passage and air-out passage one end connects with wheel hub motor inner chamber, the air intake passage and air-out
The passage other end connects air inlet and air outlet respectively, and the air inlet and air outlet are located at outside vehicle and paddled more than altitude line
And waterproof and dustproof structure is provided with, the motor shaft includes motor shaft body, and the motor shaft body center hollow forms described
Air intake passage, axle sleeve is provided between motor shaft and the wheel hub motor end cap, between the axle sleeve and the motor shaft body
Described air-out passage is formed, wheel hub is connected provided with ventilation gap between the inner stator outer circle wall and outer rotor inner peripheral wall
The cavity of electric motor internal stator, outer rotor, the air intake passage end connect with wheel hub motor inner stator cavity, the clutch shaft bearing
Using ventilation bearing, Wheel hub motor external rotor cavity is set to be connected with air-out passage, the right-hand member of the motor shaft body is in the second axle
Hold circumferentially arranged with air vent in the circumferential wall between stator core, the axle sleeve is between clutch shaft bearing and air-out passage
Blade or air channel structure are provided with gap, the blade or air channel structure are driven by wheel hub and rotated.
2. the ventilation and heat structure of hub motor for electric automobile according to claim 1, it is characterised in that：The air outlet
Force ventilated fan is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610421341.5A CN105939079B (en) | 2014-10-11 | 2014-10-11 | The ventilation and heat structure of hub motor for electric automobile |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610421341.5A CN105939079B (en) | 2014-10-11 | 2014-10-11 | The ventilation and heat structure of hub motor for electric automobile |
| CN201410535310.3A CN104319931B (en) | 2014-10-11 | 2014-10-11 | Waterproof air cooling heat radiation structure of hub motor of electric automobile |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410535310.3A Division CN104319931B (en) | 2014-10-11 | 2014-10-11 | Waterproof air cooling heat radiation structure of hub motor of electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105939079A CN105939079A (en) | 2016-09-14 |
| CN105939079B true CN105939079B (en) | 2018-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410535310.3A Active CN104319931B (en) | 2014-10-11 | 2014-10-11 | Waterproof air cooling heat radiation structure of hub motor of electric automobile |
| CN201610421341.5A Active CN105939079B (en) | 2014-10-11 | 2014-10-11 | The ventilation and heat structure of hub motor for electric automobile |
| CN201610412794.1A Active CN105958729B (en) | 2014-10-11 | 2014-10-11 | Hub motor for electric automobile air-cooled heat dissipation structure |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410535310.3A Active CN104319931B (en) | 2014-10-11 | 2014-10-11 | Waterproof air cooling heat radiation structure of hub motor of electric automobile |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610412794.1A Active CN105958729B (en) | 2014-10-11 | 2014-10-11 | Hub motor for electric automobile air-cooled heat dissipation structure |
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| CN (3) | CN104319931B (en) |
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| CN105908403A (en) * | 2016-06-15 | 2016-08-31 | 杰克缝纫机股份有限公司 | Dustproof structure of sewing machine housing |
| CN106411047A (en) * | 2016-11-28 | 2017-02-15 | 山东理工大学 | Hub motor driving system with air cooling mode |
| CN106487150B (en) * | 2016-12-27 | 2023-05-23 | 维尔纳集电电子科技(福建)有限公司 | Compact motor with heat radiation structure |
| CN109327102A (en) * | 2017-07-31 | 2019-02-12 | 天津辰宝机电科技股份有限公司 | Motor with front axle water jacket |
| CN109391086A (en) * | 2017-08-02 | 2019-02-26 | 天津辰宝机电科技股份有限公司 | Frequency control motor with water-cooling structure |
| CN107376712A (en) * | 2017-08-31 | 2017-11-24 | 深圳市杰维工业设备有限公司 | A kind of mixer |
| CN110474454A (en) * | 2018-05-10 | 2019-11-19 | 舍弗勒技术股份两合公司 | The hub drive device of electric car |
| CN108723312A (en) * | 2018-08-09 | 2018-11-02 | 乐山师范学院 | A kind of air-cooled chilling roller |
| CN109278487A (en) * | 2018-11-27 | 2019-01-29 | 辽宁工业大学 | A kind of wheelspan and the adjustable electric automobile chassis system of bodywork height |
| CN111371221A (en) * | 2018-12-25 | 2020-07-03 | 珠海格力电器股份有限公司 | Motor rotor, compressor, refrigerant circulation system and refrigeration equipment |
| CN110605935B (en) * | 2019-10-09 | 2020-09-29 | 宁波大桔科技有限公司 | Wheel for loading hub motor |
| CN111293819B (en) * | 2020-04-21 | 2022-02-25 | 河南科技大学 | Hub motor |
| CN111654143B (en) * | 2020-05-08 | 2021-06-08 | 欧佩德伺服电机节能系统有限公司 | Motor with internal circulation heat dissipation function and forming method thereof |
| CN111987844B (en) * | 2020-08-28 | 2022-11-29 | 江苏科技大学 | Self-cooling hub motor heat dissipation mechanism |
| CN112171633A (en) * | 2020-08-31 | 2021-01-05 | 上海安沛动力科技有限公司 | Unilateral hub motor shaft for robot chassis vehicle |
| CN112211907B (en) * | 2020-09-07 | 2022-05-10 | 东方电气集团东方汽轮机有限公司 | Turbine structure using electromagnetic bearings |
| CN112593954B (en) * | 2020-12-18 | 2022-07-15 | 武汉大学 | High-abrasiveness hard rock stratum TBM hob ring cooling and wear monitoring integrated system |
| CN113037016B (en) * | 2021-03-18 | 2022-08-23 | 江苏华源防爆电机有限公司 | Heat dissipation reinforcing structure of in-wheel motor |
| CN115864741B (en) * | 2023-03-01 | 2023-06-09 | 厚华(天津)动力科技有限公司 | Air-cooled hub motor of electric two-wheel vehicle |
| CN115995910B (en) * | 2023-03-23 | 2023-06-02 | 河北乾顺节能科技有限公司 | Active ventilation and heat dissipation device of outer rotor motor |
| CN117411234B (en) * | 2023-12-15 | 2024-03-08 | 陕西轩意光电科技有限公司 | Brushless motor for unmanned aerial vehicle |
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| US5189325A (en) * | 1990-06-15 | 1993-02-23 | General Electric Company | Liquid cooling the rotor of an electrical machine |
| JPH0926087A (en) * | 1995-07-14 | 1997-01-28 | Hitachi Koki Co Ltd | Lubricating oil sucking-up device for rotary equipment |
| EP1649574A2 (en) * | 2003-07-10 | 2006-04-26 | Magnetic Applications Inc. | Compact high power alternator |
| CN201100944Y (en) * | 2006-12-27 | 2008-08-13 | 鲁泊凡 | Wheel hub motor for electric car |
| CN201156689Y (en) * | 2007-12-20 | 2008-11-26 | 上海熊猫机械(集团)有限公司 | Wind cooling motor |
| CN202931112U (en) * | 2012-12-05 | 2013-05-08 | 湘电集团有限公司 | Cooling and protecting apparatus of horizontal motor |
| CN204118918U (en) * | 2014-10-11 | 2015-01-21 | 浙江兆丰机电股份有限公司 | A kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile |
-
2014
- 2014-10-11 CN CN201410535310.3A patent/CN104319931B/en active Active
- 2014-10-11 CN CN201610421341.5A patent/CN105939079B/en active Active
- 2014-10-11 CN CN201610412794.1A patent/CN105958729B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105958729A (en) | 2016-09-21 |
| CN104319931A (en) | 2015-01-28 |
| CN105939079A (en) | 2016-09-14 |
| CN104319931B (en) | 2017-01-25 |
| CN105958729B (en) | 2018-07-03 |
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