CN101712433A - Tractor with self heat dissipation function - Google Patents
Tractor with self heat dissipation function Download PDFInfo
- Publication number
- CN101712433A CN101712433A CN200910260966A CN200910260966A CN101712433A CN 101712433 A CN101712433 A CN 101712433A CN 200910260966 A CN200910260966 A CN 200910260966A CN 200910260966 A CN200910260966 A CN 200910260966A CN 101712433 A CN101712433 A CN 101712433A
- Authority
- CN
- China
- Prior art keywords
- fan
- motor
- brake
- fan blade
- towing machine
- 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
Links
Images
Abstract
The invention discloses a tractor with self heat dissipation function, which is characterized in that a heat dissipation fan is driven by the power of a motor, a fan blade or a variable speed drive mechanism of the fan is integrated to a braking device or a traction wheel, the fan is placed outside a motor main body and dissipates the heat on the outer surface of the motor by forced air cooling, and the fan and the motor rotate coaxially and synchronously or accelerate through gear drive. The tractor has the advantages that: the cooling mode of the motor belongs to forced air cooling, so the heat dissipation effect is good; the power for driving the fan is from the motor, so an additional driving circuit is not needed; and the fan blade or the variable speed drive mechanism of the fan can be integrated to the braking device or the traction wheel, so the structure is compact, and the space is saved.
Description
Technical field
The present invention relates to a kind of elevator traction machine, especially have the towing machine of self heat dissipation function.
Background technology
Present towing machine mainly contains two types of the geared machine that has speed reduction gearing and direct-drive type gearless machines.
Wherein, the geared machine that has speed reduction gearing is to adopt speed reduction gearings such as worm and gear, helical wheel or planetary wheel to carry out speed change, adopt Induction Motor-Driven mostly, its radiating mode all is to cast flabellum on rotor, machine winding in the casing and iron core are carried out the force-air cooling heat radiation, though good heat dissipation effect, motor case does not seal, degree of protection is not high, and asynchronous dynamo efficient is low.A small amount of high-speed permanent magnetic synchronous motor that adopts drives geared machine, all is to take natural air cooled mode to dispel the heat, and does not exist at motor radiating in the motor and installs additional or improved structure member.
The direct-drive type gearless machine saves the gear change link, use the permagnetic synchronous motor direct drive traction steel-cable of low speed high torque, the permagnetic synchronous motor that drives such towing machine is taked natural air cooled heat radiation mostly, its radiating effect is poor, in addition, for increasing cooling surface area, cause motor volume bigger, motor cost is higher.The direct-drive type gearless permanent-magnet synchronous traction machine that is applied on a small quantity in the high speed heavy elevator uses fan to carry out the force-air cooling heat radiation, for this class permanent magnetic synchronous traction machine, no matter be in motor, winding to be dispelled the heat, still outside casing, casing is dispelled the heat, employed fan all is independently-powered electric drive fan, and independent driving circuit control fan operation need be arranged.The defective of this radiating mode is all easy break-downs of fan control circuitry and fan electromagnetic drive, and needs to add protective circuit in case the machine winding temperature that fan failure caused is too high.
As seen, for known towing machine, or radiating effect is bad, or the radiator structure parts are many, and control is complicated, unstable properties.
Summary of the invention
The objective of the invention is: compact conformation is provided, and cost is low, stable performance, the force-air cooling towing machine of good heat dissipation effect can solve the heat dissipation problem of towing machine effectively, again can integrated towing machine in existing framing member, save space and material.
Technical conceive of the present invention is: make full use of existing framing member structure heat abstractor in the towing machine, motor power directly or by the gear mesh indirect transfer arrives heat abstractor, and the fan in the heat abstractor rotates, and realizes the force-air cooling heat radiation.
Technical scheme of the present invention provides a kind of towing machine that is integrated with heat abstractor, comprises motor main body, traction sheave, brake equipment and heat abstractor, and this heat abstractor comprises fan blade, fan housting and fan drive mechanism; It is characterized in that described heat abstractor places the outside of motor main body, and structurally integrated with brake equipment or traction sheave; The propulsive effort of described fan blade is from motor, and the rotation of machine shaft drives fan blade and rotates
A kind of embodiment of the technical program is that heat abstractor is integrated in the brake equipment, and fan blade and motor coaxle in the heat abstractor rotate synchronously.
Brake equipment is a requisite safety component in the towing machine, and its parts that bear braking force are brake hubs or brake disc, and most brake hubs or brake disc all are to be fixed on the machine shaft, and rotate synchronously with motor coaxle.The technical program is exactly the flabellum that design has heat transmission on brake hubs or brake disc, and the blade that can add on brake hubs or brake card also can be that the supporting structure of brake hubs or brake disc is improved to blade construction.
Generally have fan housting to carry out the flow direction of wind gathering and steering current outside fan blade, the technical program installs the fan housting framing member additional on brake disc or casing, or is the brake hubs structure structure of fan housting.In order to improve radiating efficiency, can increase the dissipating area of casing at the casing peripheral hardware in respect of radiating ribs.Sometimes for air-flow is contacted fully with casing or radiating ribs, can between wind gathering cover and radiating ribs, form gas channel, can further increase dissipating area at the casing peripheral hardware in respect of wind gathering cover.
When motor rotated, flabellum and motor coaxle on brake hubs or the brake disc rotated synchronously, and the air-flow that is driven by fan blade fully contacts with casing outer surface under the guiding in fan housting and casing air channel, reaches casing heat-dissipation purpose.
In the present embodiment, radiator fan and motor synchronous are rotated, and motor speed is high more, and the wind dispelling amount of radiator fan is just many more, especially, uses present embodiment in the high speed geared machine, and the radiating effect of its fan can be better.
A notable feature of this embodiment is, radiator fan and brake equipment integrate, space and material have been saved, above-mentioned brace rod is improved to blade construction, and brake hubs is improved to the fan housting structure, all be under the situation that does not increase other structure parts, realized fan heat-dissipation function.Can understand like this: even without being heat abstractor, still need there be brace rod to support in the towing machine and fixedly brake hubs or brake disc, need there be brake hubs to bear braking force, the existence of brace rod and brake hubs is necessary for towing machine, only need to improve brace rod and brake hubs structure, just can dispel the heat to forced motor.As seen, cooling fan structure is implied among the brake device structure, and in other words, radiator fan and brake equipment structurally unite two into one.
The another kind of form of implementation of the technical program is that the big gear wheel of rotating synchronously with motor coaxle is arranged in towing machine, rotating shaft place of fan blade has miniature gears in heat abstractor, motor power is delivered to heat abstractor by the gear mesh of described big gear wheel and miniature gears, and order about fan blade and rotate, the rotating speed of fan blade is greater than rotating speed of motor, and fan blade and motor are not coaxial, and described fan is the small fan of absolute construction, flabellum have outward fan housting be used for guides wind to.
Described big gear wheel and brake hubs or brake disc are fixed as one, utilizing brake hubs or brake disc is the constructional feature of particle size gyro-rotor, at mounting teeth wheel rim on brake hubs or the brake disc or directly on its structure, process toothing, the revolution card of this embodiment is shared brake hubs or brake disc especially is fit in the towing machine of tubbiness type electric machine structure.
The brake hubs of some towing machine or the radius of rotation of brake disc is little or structure on inconvenient design gear, described big gear wheel also can be fixed as one with traction sheave, mounting teeth wheel rim or directly on its structure, process toothing on traction sheave revolution end face, the revolution card of traction sheave that this embodiment is shared especially is fit in the towing machine of slender type electric machine structure.
Motor power is delivered to fan by this gear mesh and orders about the fan rotation during motor normal operation, because fan blade rotating shaft place has the radius of rotation of the radius of rotation of miniature gears less than described big gear wheel, so rotation speed of the fan is greater than motor speed.The air-flow that is driven by fan fully contacts with casing outer surface under the guiding in fan housting and casing air channel, reaches casing heat-dissipation purpose.
A feature of this embodiment is exactly by gear transmission, and radiating fan rotation speed can be under the not high situation of motor commentaries on classics greater than motor speed, obtain more wind dispelling amount, so, in the low speed gearless machine, use present embodiment, still can obtain better radiating effect.
When elevator is installed or overhaul, often use manpower to drive car, need in towing machine, design the jiggering gear, big gear wheel mentioned above can be used as the jiggering operation that the jiggering gear is used for elevator.
A notable feature of this form of implementation, also be to make full use of existing framing member on the structure, just as mentioned in the above on the structure of brake hubs or brake disc the design gear structure, need not the toothed disc of additive incrementation special use, and this gear can be used to drive radiator fan, the jiggering operation be can be used for again, space and material saved.Can understand like this: even do not take fan to dispel the heat, in towing machine, need the jiggering gear equally, the existence of jiggering gear is necessary for towing machine, so, the structure member that has existed---the jiggering direct geared is used for the gear change drive fan, jiggering gear and fan variable speed drive (VSD) gear are structurally united two into one, both reached the heat radiation purpose, saved space and material again.
The embodiment of the technical program can have two kinds of above-mentioned forms of implementation concurrently, also be applicable in the towing machine of no motor case, the number of fan can be one or more in the heat abstractor, in addition, the material of the variable gear of fan and drive fan includes but not limited to metal, plastics and high tensile strength fibrous material.
The towing machine of the technical program can be used in escalator, vertical lift elevator, the engineering winch.
The beneficial effect of the technical program is:
1, the heat radiation of the fan of motor belongs to force-air cooling, obviously improves than natural air cooled its radiating effect.For motor, good heat dissipation effect just means can design higher motor heat load, reduces the volume and weight of motor, improves the power density of motor, cost-cutting.
2, the type of cooling in the technical program belongs to cold from fanning, the power of drive fan blade rotation comes from machine shaft, do not need to add the independent circuits drive fan, avoided electric wind dispelling to fan the situation that causes the fan stall because of the additional circuit fault, thereby fan performance is more stable.
3, the cal val of electric machine iron core increases with the increase of motor speed, and for the geared machine of band drop-gear box, rotating speed of motor is higher, and core loss accounts for larger proportion in overall loss.When motor speed increased in the technical program, the rotating speed of fan also increased thereupon, and when promptly the cal val of electric machine iron core was big, meanwhile the wind dispelling amount of fan was also bigger, can dispel the heat timely and effectively to iron core.
4, can be integrated into fan blade on brake equipment and the traction sheave, even can be integrated with the jiggering gear, compact conformation is saved space and cost.
5, the material of the variable gear of fan and drive fan can be plastics and high strength fibre, can save cost, can reduce noise again.
Description of drawings
Accompanying drawing 1 is the towing machine constructional drawing (semi-sictional view) that has direct-drive type fan and drum brake mechanism
Accompanying drawing 2 is direct-drive type fan and drum brake mechanism integral structure figure
Accompanying drawing 3 is the towing machine constructionals drawing (semi-sictional view) that have direct-drive type fan and disc brake
Accompanying drawing 4 is direct-drive type fan and disc brake integral structure figure
Accompanying drawing 5 is the towing machine constructionals drawing (semi-sictional view) that have variable speed drive (VSD) formula fan and drum brake mechanism
Accompanying drawing 6 is constructionals drawing of variable speed drive (VSD) formula fan and drum brake mechanism
Accompanying drawing 7 is the towing machine constructionals drawing that have variable speed drive (VSD) formula fan and disc brake
Accompanying drawing 8 is constructionals drawing of variable speed drive (VSD) formula fan and disc brake
Accompanying drawing 9 is to have the stop towing machine constructional drawing of disc brake of variable speed drive (VSD) formula fan and axle
Accompanying drawing 10 is variable speed drive (VSD) formula fans and the stop constructional drawing of disc brake of axle
Label among the figure: 1, motor case, 2, the casing wind gathering cover, 3, the casing radiating ribs, 4, air channel, casing surface, 5, electric motor end cap, 6, traction sheave, 7, drg electromagnet, 8, brake hubs, 9, brace rod, 10, brake control lever, 11, brake disc, 12, machine shaft, 13, fan blade, 14, fan housting, 15, fan shaft, 16, big gear wheel, 17, miniature gears, 18, connection box.
The specific embodiment
By the explanation of following embodiment, will help to understand technical spirit of the present invention and technique effect, but can not limit the present invention with embodiment.
Among the embodiment of the technical program, radiator fan all is to place motor main body outside, and motor case 1 all is an enclosed construction, and design has radiating ribs 3 on casing 1, is used for increasing the dissipating area of motor; Design has wind gathering cover 2 on the casing 1, is used for steering current contact casing and radiating ribs as much as possible.
Radiator fan among Fig. 1 to Fig. 4 embodiment is the motor power direct drive, and fan blade 13 and machine shaft 12 rotate synchronously; Brake equipment is a drum brake mechanism among Fig. 1 embodiment, and the parts that bear braking force are brake hubs 8, and Fig. 2 is the constructional drawing of this drum brake mechanism; Brake equipment is a disc brake among Fig. 3 embodiment, and the parts that bear braking force are brake discs 11, and Fig. 4 is the constructional drawing of this disc brake.
Described brake hubs 8 and brake disc 11 all are to be supported on the machine shaft 12 by brace rod 9 also can rotate synchronously, this brace rod 9 is designed to the construction profile of fan blade 13, be the brace rod 9 existing supports and the fixing function of brake hubs 8 and brake disc 11, have the flabellum function that drives air flows again.All be provided with fan housting 14 on the brake hubs 8 of Fig. 1 embodiment and the brake disc 11 of Fig. 3 embodiment, described fan housting 14 can wind gathering and guides wind to.When motor normally rotates, brake hubs 8 or brake disc 11 are with machine shaft 12 rotations, fan blade 13 is rotation thereupon also, the air-flow that is driven by fan blade 13 blows to the outside face of casing 1 or takes away from casing 1 outside face under the guiding of fan housting 14, this air-flow is under the guiding that is fixed in the wind gathering cover 2 on the casing 1, flow at casing 1 outside face, add the heat radiation of speed motor.
Fig. 5 to Figure 10 is that the radiator fan among the embodiment is that motor power drives through gear change, and the rotating speed of fan blade 13 is greater than the rotating speed of machine shaft 12.Brake equipment is a drum brake mechanism among Fig. 5 embodiment, Fig. 6 is the constructional drawing of this drum brake mechanism and variable gear drive fan, brake equipment is a disc brake among Fig. 7 embodiment, Fig. 8 is the constructional drawing of this disc brake and variable gear drive fan, brake equipment is the axle disc brake of stopping among Fig. 9 embodiment, and Figure 10 is the constructional drawing of this disc brake and variable gear drive fan.
Different with Fig. 1 to Fig. 4 embodiment is, radiator fan among Fig. 5 to Figure 10 embodiment is the small fan of absolute construction, its propulsive effort is from the gear change transmission, and the number of radiator fan can be one or more in the technical program, and the radiator fan among Fig. 5 to Figure 10 embodiment all is three.The fan housting 14 of independent small fan is fixed on the motor case 1 among Fig. 5 to Figure 10 embodiment, and the miniature gears 17 with fan blade 13 coaxial synchronous rotations is arranged at fan shaft place 15.On the traction sheave 6 of the brake disc 11 of the brake hubs 8 of Fig. 5 embodiment, Fig. 7 embodiment and Fig. 9 embodiment, all be fixed with the big gear wheel 16 of coaxial synchronous rotation, described big gear wheel 16 is meshing with each other with miniature gears 17, and described big gear wheel 16 can be used as the jiggering gear and is used for the jiggering operation.
When motor normally rotated, all with its machine shaft 12 rotations, big gear wheel 16 was also rotated thereupon for brake hubs 8, brake disc 11 and traction sheave 6, and rotates by the miniature gears 17 on the gear mesh drive fan, and fan blade 13 is rotated under the driving of miniature gears 17 power.Because the radius of rotation of fan miniature gears 17 is less than the radius of rotation of big gear wheel 16, behind gear transmission, the rotating speed of fan blade 13 is greater than rotating speed of motor.The air-flow that is driven by fan blade 13 blows to the outside face of casing 1 or takes away from casing 1 outside face under the guiding of fan housting 14, this air-flow flows at casing 1 outside face under the guiding of being fixed in the wind gathering cover 2 on the casing 1, adds the heat radiation of speed motor.
The embodiment of the above is several preferred embodiment of the present invention; the contriver exemplifies these embodiment; be intended to illustrate the embodiment of the technical program; be not to limit practical range of the present invention with this; such as; blade structure, brake device structure, wind gathering cover structure, fan number etc. can be different with the embodiment of above-illustrated, and the equivalence that all shapes according to the present invention, structure and principle are done changes, and all should be covered by in protection scope of the present invention.
Claims (9)
1. a towing machine that is integrated with heat abstractor comprises motor main body, traction sheave, brake equipment and heat abstractor, and this heat abstractor comprises fan blade, fan housting and fan drive mechanism; It is characterized in that described heat abstractor places the outside of motor main body, and structurally integrated with brake equipment or traction sheave; The propulsive effort of described fan blade is from motor, and the rotation of machine shaft drives fan blade and rotates.
2. towing machine according to claim 1 is characterized in that, on the brake hubs of brake equipment or brake disc fan blade is arranged, and this fan blade and motor coaxle rotate synchronously.
3. towing machine according to claim 2 is characterized in that described fan blade is to be formed by the brace rod structural development in brake hubs or the brake disc, and promptly the brace rod of brake hubs or brake disc and fan blade structurally are same parts.
4. towing machine according to claim 2 is characterized in that in described flabellum outside fan housting being arranged, and the air-flow that is driven by flabellum can be assembled and guide to this fan housting.Described fan housting framing member is to be formed by the brake hubs structural development, or the framing member that installs additional on brake disc, or the framing member that installs additional on casing.
5. towing machine according to claim 1, it is characterized in that described motor power by gear transmission to fan blade and it is rotated, the rotating speed of fan blade is greater than rotating speed of motor, and fan blade and motor are not coaxial.
6. towing machine according to claim 5, it is characterized in that, the big gear wheel of rotating synchronously with motor coaxle is arranged in towing machine, rotating shaft place of fan blade has miniature gears in heat abstractor, motor power is delivered to heat abstractor by the gear mesh of described big gear wheel and miniature gears, and orders about fan blade and rotate.
7. towing machine according to claim 6 is characterized in that the brake hubs of described big gear wheel and brake equipment or brake disc are fixed as one.
8. towing machine according to claim 6 is characterized in that described big gear wheel and traction sheave are fixed as one.
9. towing machine according to claim 6 is characterized in that described big gear wheel can be used for the jiggering operation as the jiggering gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910260966A CN101712433A (en) | 2009-12-18 | 2009-12-18 | Tractor with self heat dissipation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910260966A CN101712433A (en) | 2009-12-18 | 2009-12-18 | Tractor with self heat dissipation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101712433A true CN101712433A (en) | 2010-05-26 |
Family
ID=42416507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910260966A Pending CN101712433A (en) | 2009-12-18 | 2009-12-18 | Tractor with self heat dissipation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101712433A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452880A (en) * | 2013-09-11 | 2013-12-18 | 南通中远川崎船舶工程有限公司 | Ventilation fan used under wind with high temperature and high humidity water vapor |
| CN104329647A (en) * | 2014-10-21 | 2015-02-04 | 苏州承源光电科技有限公司 | Separable liquid-cooled Led (Light Emitting Diode) radiator |
| CN103398941B (en) * | 2013-08-21 | 2016-01-06 | 中国科学院合肥物质科学研究院 | A kind of bell jar seal liquid heavy metal whirligig |
| CN106966272A (en) * | 2017-05-08 | 2017-07-21 | 苏州蒙特纳利驱动设备有限公司 | A kind of traction machine heat sink |
| WO2017129850A1 (en) * | 2016-01-25 | 2017-08-03 | Kone Corporation | Tensioning arrangement for an elevator |
| CN108233617A (en) * | 2018-01-31 | 2018-06-29 | 湖北环电磁装备工程技术有限公司 | The cutter head of shield machine mechanism that a kind of no frame permanent magnet synchronous motor directly drives |
| CN110077941A (en) * | 2019-05-27 | 2019-08-02 | 湖北科技学院 | A kind of cooling mechanism of elevator traction machine |
| CN110412543A (en) * | 2019-08-23 | 2019-11-05 | 上海禾赛光电科技有限公司 | Laser radar and its radiator |
| CN113636435A (en) * | 2021-08-12 | 2021-11-12 | 中国华能集团清洁能源技术研究院有限公司 | Vertical conveying device for maintenance personnel of wind power generation equipment |
-
2009
- 2009-12-18 CN CN200910260966A patent/CN101712433A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398941B (en) * | 2013-08-21 | 2016-01-06 | 中国科学院合肥物质科学研究院 | A kind of bell jar seal liquid heavy metal whirligig |
| CN103452880A (en) * | 2013-09-11 | 2013-12-18 | 南通中远川崎船舶工程有限公司 | Ventilation fan used under wind with high temperature and high humidity water vapor |
| CN104329647A (en) * | 2014-10-21 | 2015-02-04 | 苏州承源光电科技有限公司 | Separable liquid-cooled Led (Light Emitting Diode) radiator |
| WO2017129850A1 (en) * | 2016-01-25 | 2017-08-03 | Kone Corporation | Tensioning arrangement for an elevator |
| CN106966272A (en) * | 2017-05-08 | 2017-07-21 | 苏州蒙特纳利驱动设备有限公司 | A kind of traction machine heat sink |
| CN108233617A (en) * | 2018-01-31 | 2018-06-29 | 湖北环电磁装备工程技术有限公司 | The cutter head of shield machine mechanism that a kind of no frame permanent magnet synchronous motor directly drives |
| CN110077941A (en) * | 2019-05-27 | 2019-08-02 | 湖北科技学院 | A kind of cooling mechanism of elevator traction machine |
| CN110077941B (en) * | 2019-05-27 | 2023-12-15 | 湖北科技学院 | Heat dissipation mechanism of elevator traction machine |
| CN110412543A (en) * | 2019-08-23 | 2019-11-05 | 上海禾赛光电科技有限公司 | Laser radar and its radiator |
| CN113636435A (en) * | 2021-08-12 | 2021-11-12 | 中国华能集团清洁能源技术研究院有限公司 | Vertical conveying device for maintenance personnel of wind power generation equipment |
| CN113636435B (en) * | 2021-08-12 | 2023-01-03 | 中国华能集团清洁能源技术研究院有限公司 | Vertical conveying device for maintenance personnel of wind power generation equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101712433A (en) | Tractor with self heat dissipation function | |
| CN201608593U (en) | Permanent magnet synchronous tractor motor integrated with radiator | |
| CN107083644B (en) | A kind of washing machine drive system and washing machine | |
| CN102285573B (en) | Permanent magnet synchronous traction machine with speed reducer | |
| CN202707537U (en) | Heat radiator with fan for motor of paper shredder | |
| CN201220897Y (en) | Permanent magnetism synchronous gearless reel type raising apparatus for hoisting machine | |
| CN112134182A (en) | Convection heat dissipation type low-voltage distribution switch cabinet | |
| CN201587784U (en) | Traction machine with self heat radiating function | |
| CN110994897A (en) | A generator for a wind turbine | |
| CN104860172B (en) | Internal rotor permanent-magnetic synchro traction machine | |
| CN111371238B (en) | High heat dissipation type motor device based on fluid coupling | |
| CN104541745A (en) | Mower | |
| CN201971522U (en) | Power driving device for construction elevator | |
| CN202193524U (en) | Permanent magnet synchronous traction machine with speed reduction device | |
| CN203722457U (en) | Permanent magnet actuator with forced convection heat dissipating air-cooled hood | |
| CN214256035U (en) | Motor easy to radiate heat | |
| CN211377807U (en) | Optimized hub motor | |
| CN205319856U (en) | Novel generator | |
| CN201587789U (en) | Escalator traction machine | |
| CN204426003U (en) | A kind of mower | |
| CN210182886U (en) | Heat dissipation device for power equipment | |
| CN104362828A (en) | Eddy-current air-cooling retarder of doubly-salient structure | |
| CN209037379U (en) | A kind of wheel motor drive device | |
| CN209526616U (en) | A kind of variable-pole multi-speed motor | |
| CN216306137U (en) | Speed reducer for wind driven generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100526 |