CN204118918U - A kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile - Google Patents
A kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile Download PDFInfo
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- CN204118918U CN204118918U CN201420587266.6U CN201420587266U CN204118918U CN 204118918 U CN204118918 U CN 204118918U CN 201420587266 U CN201420587266 U CN 201420587266U CN 204118918 U CN204118918 U CN 204118918U
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- 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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Abstract
The utility model discloses a kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile, wheel hub motor end cap is provided with in the wheel hub motor left and right sides, clutch shaft bearing is provided with between motor shaft and left side wheel hub electric motor end cap, hermetically-sealed construction is provided with between wheel hub motor end cap and external rotor, motor shaft, motor shaft is provided with inside and outside two-layer concentrically ringed air channel, internal layer air channel is air intake passage, outer air channel is air-out passage, air intake passage and air-out passage one end and wheel hub motor inner space, air intake passage and the air-out passage other end connect air inlet and air outlet respectively.The utility model makes air-flow take away heat at the inner smooth flow of the wheel hub motor of sealing, thermal diffusivity and the water proofing property of wheel hub motor system are taken into account, this structure is transformed cleverly under the prerequisite not affecting original hub motor structure, good forced ventilation radiating effect can be realized, ensure that the fail safe in electric automobile during traveling process, take into account the compactedness of electric machine structure and the economy of manufacturing cost simultaneously.
Description
Technical field
The utility model relates to electric automobile, particularly relates to electric automobile hub.
Background technology
Wheel hub motor is the motor of a kind of internal stator, external rotor form, and its power, transmission and brake apparatus are all incorporated in wheel hub, is therefore greatly simplified by the mechanical part of motor vehicle.Heating in machine operation process comes from the loss of winding iron core, and the size of caloric value is main relevant with stator current, simultaneously indirectly relevant with power output and output torque.When the electric automobile of In-wheel motor driving is in heavy duty, climbing or suddenly accelerates, motor needs larger electric current to provide larger output torque, can produce more heat at short notice, winding temperature is raised on motor winding and iron core.But machine operation has certain temperature limiting, the class of insulation of winding limits the temperature upper limit of motor internal.The temperature that motor internal is higher makes the efficiency of motor greatly reduce, once exceed this temperature upper limit, the winding insulation of motor, by impaired, causes motor winding interturn short-circuit even to blow.In addition, the easy at high temperature loss of excitation of permanent magnet magnet steel of wheel hub motor inside, after temperature exceedes Curie point, the magnetic of permanent magnet can not be recovered completely, affects exerting oneself and efficiency of motor.
Normally work at the temperature allowed to enable wheel hub motor, usually following several processing mode is had: one is the model selecting rated power larger, the rated power of such motor has larger redundancy relative to required power during electric automobile nominal situation, rely on natural heat dissipation to meet the demands during machine operation, but this method is reasonable not in economy and space utilization etc.; Two is that fin by wheel hub motor end cap is installed increases area of dissipation, the heat produced in running with the mode rapid dispersion motor of natural heat dissipation, the method is mentioned in utility model patent CN201310756432.0, but the radiating effect of this kind of mode depends on the size of fin, surface area and natural draft condition, and usual heat-sinking capability is limited; Another kind method adopts forced heat radiation technology, comprises the modes such as air-cooled and liquid cooling.Usual employing air blast cooling, namely at motor internal provided with fan, make motor internal form cross-ventilation with outside, heat can be discharged to outside motor in time.For identical radiator structure, the radiating effect of air blast cooling will significantly better than natural heat dissipation.On the other hand, consider in vehicle travel process and may run into ponding and sleety weather, wheel hub motor requires to have good sealing, infiltrate motor internal to prevent water and destroy winding insulation, cause electric short circuit and chemical corrosion, but current air-cooled heat dissipation structure there is no the requirement that method solves sealing, and the requirement of above two aspects is contradiction, annoyings those skilled in the art always.
Utility model content
Technical problem to be solved in the utility model is just to provide a kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile, both the water-proof sealing of wheel hub had been maintained, air blast cooling can be realized again to meet cooling requirements during the high-power operation of motor, ensure that the fail safe in electric automobile during traveling process, take into account the compactedness of electric machine structure and the economy of manufacturing cost simultaneously.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile, comprise external rotor and internal stator, described external rotor is located at internal stator outer circumferential sides, described internal stator is installed on motor shaft, wheel hub motor end cap is provided with in the wheel hub motor left and right sides, described wheel hub motor end cap and external rotor are fixed, clutch shaft bearing is provided with between described motor shaft and left side wheel hub electric motor end cap, the second bearing is provided with between described motor shaft and right side wheel hub electric motor end cap, described wheel hub motor end cap and external rotor, hermetically-sealed construction is provided with between motor shaft, described motor shaft is provided with inside and outside two-layer concentrically ringed air channel, internal layer air channel is air intake passage, outer air channel is air-out passage, described air intake passage and air-out passage one end and wheel hub motor inner space, described air intake passage and the air-out passage other end connect air inlet and air outlet respectively, described air inlet and air outlet are positioned at outside vehicle and paddle more than altitude line and to be provided with waterproof and dustproof structure.
Preferably, described motor shaft comprises motor shaft body, described motor shaft body center hollow forms described internal layer wind inlet channel, is provided with axle sleeve between described motor shaft and wheel hub motor end cap, the outer air-out passage described in being formed between described axle sleeve and described motor shaft body.
Preferably, described internal stator outer circle wall and the cavity being provided with ventilation gap between external rotor inner peripheral wall and being communicated with wheel hub motor internal stator, external rotor, described air intake passage end and wheel hub motor internal stator cavity connects, described clutch shaft bearing adopts ventilation bearing, and Wheel hub motor external rotor cavity is communicated with air-out passage.
Preferably, the circle wall of the right-hand member of described motor shaft body between the second bearing and stator core is circumferentially provided with ventilation hole.
Preferably, described axle sleeve is provided with blade or air channel structure in the gap between clutch shaft bearing and exhaust air flue, and described blade or air channel structure are driven by wheel hub and rotate.
Preferably, described air outlet is provided with force ventilated fan.
The utility model adopt a kind of with the sealing of external isolation inside and outside double-deck axle aeration structure, match with the wheel hub motor end cap of particular design, except air inlet/outlet passage, wheel hub motor inner sealing is closed, wind inlet channel, wheel hub motor internal stator chamber, ventilation gap between wheel hub motor rotor, Wheel hub motor external rotor chamber, outer bearing air channel, exhaust air flue forms an air flue jointly, air enters wheel hub motor inner chamber from the air inlet be connected with wind inlet channel, when stator winding and the iron core of motor, take away heat and discharge from the air outlet of exhaust air flue, thus realize the effect of heat radiation.
To sum up, the utility model makes air-flow take away heat at the inner smooth flow of the wheel hub motor of sealing, thermal diffusivity and the water proofing property of wheel hub motor system are taken into account, this structure is transformed cleverly under the prerequisite not affecting original hub motor structure, both good forced ventilation radiating effect can have been realized, ensure that the fail safe in electric automobile during traveling process, take into account the compactedness of electric machine structure and the economy of manufacturing cost simultaneously.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
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, a kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile, comprises external rotor 2 and internal stator 1, and described internal stator 1 is formed by silicon steel sheet closed assembly, embeds three-phase windings in stator slot.Described external rotor 2 is located at internal stator 1 outer circumferential sides, evenly embeds permanent magnet magnet steel inside described external rotor 2.Described internal stator 1 is installed on motor shaft 4, wheel hub motor end cap 3 is provided with in the axial both sides of wheel hub motor, comprise left side wheel hub electric motor end cap and right side wheel hub electric motor end cap, described wheel hub motor end cap 3 is fixed with external rotor 2, clutch shaft bearing is provided with between described motor shaft 4 and left side wheel hub electric motor end cap, be provided with the second bearing between described motor shaft and right side wheel hub electric motor end cap, the motor shaft other end is connected with vehicle hanging mechanism.
Be provided with hermetically-sealed construction between described wheel hub motor end cap 3 and external rotor and motor shaft 4, between external rotor and both sides wheel hub motor end cap, form closed wheel hub motor inner chamber.Right side wheel hub electric motor end cap closes motor wheel hub completely on the one hand, and on the other hand except clutch shaft bearing, left side wheel hub electric motor end cap also closes motor wheel hub, only leaves the ventilation and heat passage on clutch shaft bearing and the cavity connects in motor wheel hub.Described motor shaft is provided with inside and outside two-layer concentrically ringed air channel, internal layer air channel is air intake passage 5, outer air channel is air-out passage 6, the hub end of described air intake passage 5 and air-out passage 6 and wheel hub motor inner space, the other end of described air intake passage and air-out passage connects air inlet and air outlet respectively, and described air inlet and air outlet are positioned at outside vehicle and paddle more than altitude line and to be provided with waterproof and dustproof structure.Due to the inner chamber integrated upper sealing of wheel hub motor, only have setting wind-cooling heat dissipating passage can with wheel hub motor inner space, even and air intake passage and air-out passage be also provided with corresponding water proof and dust proof structure, thus ensure that overall water proofing property.
Described motor shaft 4 comprises motor shaft body, and motor shaft body inner tubal wall is fixedly connected with stator core, and outer tube wall is provided with flange and wheel hub motor end cap is fixed.Described motor shaft body center hollow forms described internal layer wind inlet channel, is arranged with axle sleeve between described motor shaft and wheel hub motor end cap, the outer air-out passage described in being formed between described axle sleeve and described motor shaft body.
Described internal stator outer circle wall be provided with ventilation gap between external rotor inner peripheral wall and be communicated with wheel hub motor medial and lateral cavity, described air intake passage end is communicated with wheel hub motor inner chambers, and described clutch shaft bearing adopts ventilation bearing that cavity outside wheel hub motor is communicated with air-out passage.
The hub end of described motor shaft body, the circle wall between the second bearing and stator core is circumferentially provided with ventilation hole.Blade or air channel structure 7 is provided with in the gap of described axle sleeve between clutch shaft bearing and exhaust air flue, described blade or air channel structure 7 are driven by wheel hub and rotate, wherein air channel structure can adopt helical structure, and to promote the flowing of air-flow, described air outlet is provided with force ventilated fan.
In the hub motor for electric automobile involved by the utility model, outside ventilation gap between wind inlet channel, wheel hub motor inner chambers, wheel hub motor rotor, wheel hub motor, cavity, clutch shaft bearing air channel, exhaust air flue form an air flue jointly, air enters wheel hub motor inner chamber from the air inlet be connected with wind inlet channel, when stator winding and the iron core of motor, take away heat and discharge from the air outlet of exhaust air flue, thus realizing the effect of heat radiation.
In order to make air can flow along air flue, need to apply suction in the duct.During high vehicle speeds, blade outside the outer wheel hub drive clutch shaft bearing rotated or air channel structure synchronous rotary, hot-air is extracted out from wheel hub motor cavity, air outlet is transported to through exhaust air flue, and the motor internal of sealing is owing to producing negative pressure, from the air that air inlet inlet temperature is lower, cooling winding and iron core, so go round and begin again further.
On the other hand, when considering that vehicle low-speed heave-load is climbed, the rotating speed of wheel is lower, and air mass flow is not enough, the fan energising of air outlet now can be made to rotate and produce suction, force air to flow in air channel, to strengthen radiating effect.
Claims (6)
1. the waterproof air-cooled heat dissipation structure of a hub motor for electric automobile, comprise external rotor and internal stator, described external rotor is located at internal stator outer circumferential sides, described internal stator is installed on motor shaft, wheel hub motor end cap is provided with in the wheel hub motor left and right sides, described wheel hub motor end cap and external rotor are fixed, clutch shaft bearing is provided with between described motor shaft and left side wheel hub electric motor end cap, the second bearing is provided with between described motor shaft and right side wheel hub electric motor end cap, it is characterized in that: described wheel hub motor end cap and external rotor, hermetically-sealed construction is provided with between motor shaft, described motor shaft is provided with inside and outside two-layer concentrically ringed air channel, internal layer air channel is air intake passage, outer air channel is air-out passage, described air intake passage and air-out passage one end and wheel hub motor inner space, described air intake passage and the air-out passage other end connect air inlet and air outlet respectively, described air inlet and air outlet are positioned at outside vehicle and paddle more than altitude line and to be provided with waterproof and dustproof structure.
2. the waterproof air-cooled heat dissipation structure of a kind of hub motor for electric automobile according to claim 1, it is characterized in that: described motor shaft comprises motor shaft body, described motor shaft body center hollow forms described internal layer wind inlet channel, axle sleeve is provided with, the outer air-out passage described in being formed between described axle sleeve and described motor shaft body between described motor shaft and wheel hub motor end cap.
3. the waterproof air-cooled heat dissipation structure of a kind of hub motor for electric automobile according to claim 2, it is characterized in that: described internal stator outer circle wall and the cavity being provided with ventilation gap between external rotor inner peripheral wall and being communicated with wheel hub motor internal stator, external rotor, described air intake passage end and wheel hub motor internal stator cavity connects, described clutch shaft bearing adopts ventilation bearing, and Wheel hub motor external rotor cavity is communicated with air-out passage.
4. the waterproof air-cooled heat dissipation structure of a kind of hub motor for electric automobile according to claim 3, is characterized in that: the right-hand member of the described motor shaft body circle wall between the second bearing and stator core is circumferentially provided with ventilation hole.
5. the waterproof air-cooled heat dissipation structure of a kind of hub motor for electric automobile according to claim 3, it is characterized in that: described axle sleeve is provided with blade or air channel structure in the gap between clutch shaft bearing and exhaust air flue, described blade or air channel structure are driven by wheel hub and rotate.
6. the waterproof air-cooled heat dissipation structure of a kind of hub motor for electric automobile according to claim 5, is characterized in that: described air outlet is provided with force ventilated fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420587266.6U CN204118918U (en) | 2014-10-11 | 2014-10-11 | A kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420587266.6U CN204118918U (en) | 2014-10-11 | 2014-10-11 | A kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile |
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| CN204118918U true CN204118918U (en) | 2015-01-21 |
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| CN201420587266.6U Active CN204118918U (en) | 2014-10-11 | 2014-10-11 | A kind of waterproof air-cooled heat dissipation structure of hub motor for electric automobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553149A (en) * | 2016-03-09 | 2016-05-04 | 胡改清 | Dual-increase and dual-decrease motor and generator with hollow mandrel variable-magnetism structure |
| CN104319931B (en) * | 2014-10-11 | 2017-01-25 | 浙江兆丰机电股份有限公司 | Waterproof air cooling heat radiation structure of hub motor of electric automobile |
| CN111654143A (en) * | 2020-05-08 | 2020-09-11 | 欧佩德伺服电机节能***有限公司 | Motor with internal circulation heat dissipation function and forming method thereof |
-
2014
- 2014-10-11 CN CN201420587266.6U patent/CN204118918U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319931B (en) * | 2014-10-11 | 2017-01-25 | 浙江兆丰机电股份有限公司 | Waterproof air cooling heat radiation structure of hub motor of electric automobile |
| CN105553149A (en) * | 2016-03-09 | 2016-05-04 | 胡改清 | Dual-increase and dual-decrease motor and generator with hollow mandrel variable-magnetism structure |
| CN105553149B (en) * | 2016-03-09 | 2018-11-02 | 胡改清 | Hollow core shaft becomes the double down motor of the double increasings of magnetic structure and generator |
| CN111654143A (en) * | 2020-05-08 | 2020-09-11 | 欧佩德伺服电机节能***有限公司 | Motor with internal circulation heat dissipation function and forming method thereof |
| CN111654143B (en) * | 2020-05-08 | 2021-06-08 | 欧佩德伺服电机节能***有限公司 | Motor with internal circulation heat dissipation function and forming method thereof |
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