CN102277710B - Variable-frequency speed-reducing clutch of bionic hand rubbing of washing machine - Google Patents
Variable-frequency speed-reducing clutch of bionic hand rubbing of washing machine Download PDFInfo
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- CN102277710B CN102277710B CN 201110203699 CN201110203699A CN102277710B CN 102277710 B CN102277710 B CN 102277710B CN 201110203699 CN201110203699 CN 201110203699 CN 201110203699 A CN201110203699 A CN 201110203699A CN 102277710 B CN102277710 B CN 102277710B
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Abstract
The invention discloses a variable-frequency speed-reducing clutch of bionic hand rubbing of a washing machine. The clutch provided by the invention comprises a lower shell and an input shaft which are matched; the lower shell is equipped with a stator of a direct-current brushless motor and the end part of the input shaft is connected with an external rotor of the direct-current brushless motor; the stator of the direct-current brushless motor is located at an inner cavity of the external rotor of the direct-current brushless motor and the input shaft is assembled with a sliding clutch mechanism composed of a shaft sleeve, a clutch shaft, a clutch sliding block and a clutch spring; the shaft sleeve covers the input shaft and the clutch shaft is located above the shaft sleeve to rotatably cover the input shaft; the shaft sleeve and the clutch shaft are all provided with peripheral splines; guiding splines on the inner periphery of the clutch sliding block are slidingly matched with the peripheral spline of the clutch shaft; the clutch spring is pressed on an annular lug boss on the periphery of the clutch sliding block and the clutch sliding block is connected with a clutch control mechanism. The clutch provided by the invention realizes the variable-frequency washing of the bionic hand rubbing of the washing machine; and the clutch enriches the washing function and has the advantages of low noise, energy source conversation, good safety performance and the like.
Description
Technical field
The present invention relates to the technical field of the wheeled washing machine of a kind of Full-automatic wave, particularly the speed-reducing clutch of washing machine, specifically a kind of Bionic hand rubbing variable frequency speed reducing clutch for washing machine.
Background technology
The new washing machine overwhelming majority of releasing is installed side by side for decelerating clutch of washing machine and single-phase asynchronous motor on prior art such as the market, by belt pulley and belt transmission.The efficient of such decelerating clutch of washing machine is low, and noise is large, and practicality is relatively poor; Thereby the relevant technologies personnel to have proposed motor vertical with clutch, the technical scheme that concentric is installed.Be that the ZL00260194.x Chinese utility model patent discloses automatic washing machine band cup-shaped rotor single-bearing motor and special clutch device thereof such as the patent No., this patent is exactly that common single-phase asynchronous motor and decelerating clutch of washing machine concentric are installed, and has improved transmission efficiency.But this patented technology scheme just simply will be installed in the direct at right angle setting of single-phase asynchronous motor on decelerating clutch of washing machine next door originally to the below of clutch; Because the efficient of motor not have too large raising, mode of washing is single, function simple and its install and connect complicatedly, required precision is high, be not suitable for producing in enormous quantities, and washing machine can not realize frequency conversion rubbing washing, the many speed of frequency conversion are dewatered.The patent No. is that ZL00234747.4 discloses the decelerating clutch of washing machine that brushless electric machine directly drives for another example, this patent adopts brushless electric machine direct driven washing machine clutch, solved single-phase asynchronous motor efficient low, improved efficiency, but the connection of this structural electromotor is complicated, can only realize common mode of washing, the main element union piece is more, and the clutch installation accuracy is required too high, and there is the high shortcoming of fault rate in it, so this patented technology scheme is not suitable for producing in batches product.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned prior art present situation, provide integrated mode, standardization, modularization in one, has high-efficient low-noise, simple in structure, easy for installation, and can realize the Bionic hand rubbing function, and a kind of Bionic hand rubbing variable frequency speed reducing clutch for washing machine that is suitable for producing in enormous quantities.
The present invention solves the problems of the technologies described above the technical scheme that adopts: Bionic hand rubbing variable frequency speed reducing clutch for washing machine, comprise equipped mutually lower house and power shaft, on the cylindrical convex shoulder of lower house DC. brushless electric machine stator is installed, the end of power shaft is connected with the dc brushless motor outer rotor, DC. brushless electric machine stator is arranged in the inner chamber of dc brushless motor outer rotor, and power shaft is fitted with the slide engaging and disengaging mechanism that is comprised of axle sleeve, clutch shaft, clutch slider and brake spring; Axle sleeve pin key type cover fits on the power shaft, and the upper end of axle sleeve is pushed up mutually with the lower end boss side surfaces of power shaft and is joined, the bottom of axle sleeve cooperates the location with the via hole boss of dc brushless motor outer rotor, clutch shaft is positioned at axle sleeve top turning set and is contained on the power shaft, axle sleeve and clutch shaft all are shaped with the periphery spline, clutch slider is shaped with interior week, the guiding spline was matched with the periphery spline slip of axle sleeve and clutch shaft, and brake spring press fit on the annulus boss that the clutch slider periphery is shaped with and clutch slider is connected with clutch control mechanism.
For optimizing technique scheme, the concrete measure of taking also comprises:
Above-mentioned clutch control mechanism comprises trip(ping) lever, clutch pressing plate, rotation mandrel, rotating shaft fixed block and push rod; Clutch slider is connected with the clutch pressing plate, and the clutch pressing plate is equipped mutually with the rotating shaft fixed block take rotation mandrel as axis of rotation, the clutch pressing plate is equipped with extension spring, and the rotating shaft fixed block is fixedly mounted on the lower house through screw, and trip(ping) lever matches with clutch pressing plate and push rod respectively.
Above-mentioned DC. brushless electric machine stator is the plastic package brushless direct current motor stator, and the plastic package brushless direct current motor stator is connected through stator trip bolt and lower house are fastening, is fitted with the Hall element feedback component on the convex shoulder that the plastic package brushless direct current motor stator is shaped with; And the upper end edge of dc brushless motor outer rotor matches with the lower end edge gap of Hall element feedback component.
The endoporus of above-mentioned clutch shaft is fitted with respectively the 3rd oiliness bearing and the 4th oiliness bearing in two ends up and down, clutch shaft rotates the dress that matches through the 3rd oiliness bearing and the 4th oiliness bearing and power shaft, the inner fovea part of lower house is embedded with the second spring bearing, fastening being connected of periphery bearing boss of the inner ring of the second spring bearing and clutch shaft, power shaft is connected with impeller shafts through gear reduction system.
Above-mentioned lower house upper end is fitted with upper shell, the inner fovea part of upper shell is embedded with the first spring bearing, upper shell is fitted with dehydrating shaft through the first spring bearing, the periphery bearing installed surface of dehydrating shaft matches with the inner ring side face interference of the first spring bearing, the place, assembling aperture of dehydrating shaft and upper shell is equipped with large sealing packing ring, and the impeller shafts rotational support is worn in the endoporus that fits over dehydrating shaft; When dehydration end or brake hard, adopt the logical reversing the current of motor to realize electromagnetic braking.
Above-mentioned impeller shafts is fitted in the endoporus of dehydrating shaft through the first oiliness bearing and the rotation of the second oiliness bearing, between the upper aperture of dehydrating shaft and impeller shafts small sealing ring is installed.
Above-mentioned dc brushless motor outer rotor upper end edge periphery is shaped with the boss shoulder, and Hall element feedback component lower end edge has kink, and the boss shoulder matches with the kink clearance distance.
Compared with prior art, the clutch system that has adopted clutch slider, trip(ping) lever, clutch pressing plate, axle sleeve, brake spring, rotation mandrel, rotating shaft fixed block and clutch shaft to consist of of the present invention forms a kind of frequency conversion speed-down clutch new construction jointly with the plastic package brushless direct current motor system, by the spline slide engaging and disengaging mechanism that adopts in the structure, realized the opposite direction Bionic hand rubbing washing function of washing machine inner tub and impeller dish, plastic package brushless direct current motor system simultaneously, easy for installation, have good insulating properties, security is higher.This invention high-efficient low-noise, simple in structure, the flexible operation smoothness also is suitable for mass industrialized production.
Description of drawings
Fig. 1 is the full section structural representation of the embodiment of the invention;
Fig. 2 is the structural representation of slide engaging and disengaging mechanism among Fig. 1;
Fig. 3 is that the axle that Fig. 1 embodiment removes behind stator, rotor and the power shaft is looked schematic diagram;
Fig. 4 is that the axle behind the dismounting clutch pressing plate of Fig. 3 embodiment is looked schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is to Figure 4 shows that structural representation of the present invention.
Reference numeral wherein is: lower house 11, upper shell 12, plastic package brushless direct current motor stator 21, dc brushless motor outer rotor 22, upper end edge 22a, via hole boss 221, boss shoulder 222, Hall element feedback component 23, stator trip bolt 24, power shaft 3, lower end boss side surfaces 31, axle sleeve 41, clutch shaft 42, periphery bearing boss 421, clutch slider 43, annulus boss 431, brake spring 44, trip(ping) lever 45, clutch pressing plate 46, extension spring 461, rotation mandrel 47, rotating shaft fixed block 48, push rod 49, gear reduction system 5, impeller shafts 6, dehydrating shaft 7, large sealing packing ring 81, small sealing ring 82, the first spring bearing 91, the second spring bearing 92, the first oiliness bearing 93, the second oiliness bearing 94, the 3rd oiliness bearing 95, the 4th oiliness bearing 96.
As shown in Figures 1 to 4, Bionic hand rubbing variable frequency speed reducing clutch for washing machine of the present invention, comprise equipped mutually lower house 11 and power shaft 3, on the cylindrical convex shoulder of lower house 11 DC. brushless electric machine stator is installed, the end of power shaft 3 is connected with dc brushless motor outer rotor 22, DC. brushless electric machine stator is arranged in the inner chamber of dc brushless motor outer rotor 22, and power shaft 3 is fitted with the slide engaging and disengaging mechanism that is comprised of axle sleeve 41, clutch shaft 42, clutch slider 43 and brake spring 44; Axle sleeve 41 pin key type covers fit on the power shaft 3, and the upper end of axle sleeve 41 is pushed up mutually with the lower end boss side surfaces 31 of power shaft 3 and is joined, the bottom of axle sleeve 41 cooperates the location with the via hole boss 221 of dc brushless motor outer rotor 22, clutch shaft 42 is positioned at axle sleeve 41 top turning sets and is contained on the power shaft 3, axle sleeve 41 and clutch shaft 42 all are shaped with the periphery spline, clutch slider 43 is shaped with interior week, the guiding spline was matched with the periphery spline slip of axle sleeve 41 and clutch shaft 42, and brake spring 44 press fit on the annulus boss 431 that clutch slider 43 peripheries are shaped with and clutch slider 43 is connected with clutch control mechanism.Dc brushless motor outer rotor 22 of the present invention is fastening equipped with power shaft 3 concentrics, reduced the link of belt transport, greatly improved transmission efficiency, and axle sleeve 41 and clutch shaft 42 all are shaped with the periphery spline, clutch slider 43 is shaped with the spline that leads in interior week, realize a kind of brand-new slide engaging and disengaging structure by being slidingly matched of spline, thereby reach the washing function of the opposite direction Bionic hand rubbing of washing machine inner tub and impeller dish, this slide engaging and disengaging reaction is quick, light and flexible and easily operation, have characteristics simple in structure, easy for installation.
Clutch control mechanism of the present invention comprises trip(ping) lever 45, clutch pressing plate 46, rotation mandrel 47, rotating shaft fixed block 48 and push rod 49; Clutch slider 43 is connected with clutch pressing plate 46, and clutch pressing plate 46 is equipped mutually with rotating shaft fixed block 48 take rotation mandrel 47 as axis of rotation, rotating shaft fixed block 48 is fixedly mounted on the lower house 11 through screw, trip(ping) lever 45 matches with clutch pressing plate 46 and push rod 49 respectively, and clutch pressing plate 46 is equipped with extension spring 461.Clutch control mechanism is used for controlling clutch slider 43 and slides up and down, by docking and the power transmission that separates realization power shaft 3 and clutch shaft 42 of spline.
What DC. brushless electric machine stator of the present invention adopted is plastic package brushless direct current motor stator 21, plastic package brushless direct current motor stator 21 is fitted with Hall element feedback component 23 through stator trip bolt 24 and 11 fastening being connected of lower house on the convex shoulder that plastic package brushless direct current motor stator 21 is shaped with; And the upper end edge 22a of dc brushless motor outer rotor 22 matches with the lower end edge gap of Hall element feedback component 23.Motor stator of the present invention adopts flip-clip, has better insulating properties, uses more safe and reliable.The dc brushless motor outer rotor is all coaxial equipped with clutch shaft 42, axle sleeve 41, has very high axial stability.
For obtaining better technique effect, the endoporus of clutch shaft 42 of the present invention is fitted with respectively the 3rd oiliness bearing 95 and the 4th oiliness bearing 96 in two ends up and down, clutch shaft 42 rotates equipped mutually through the 3rd oiliness bearing 95 with the 4th oiliness bearing 96 and power shaft 3, the inner fovea part of lower house 11 is embedded with the second spring bearing 92,421 fastening being connected of periphery bearing boss of the inner ring of the second spring bearing 92 and clutch shaft 42, power shaft 3 is connected with impeller shafts 6 through gear reduction system 5.
Among the embodiment, lower house 11 upper ends are fitted with upper shell 12, the inner fovea part of upper shell 12 is embedded with the first spring bearing 91, upper shell 12 is fitted with dehydrating shaft 7 through the first spring bearing 91, the periphery bearing installed surface of dehydrating shaft 7 matches with the inner ring side face interference of the first spring bearing 91, dehydrating shaft 7 is equipped with large sealing packing ring 81 with the place, assembling aperture of upper shell 12, and impeller shafts 6 rotational support are worn in the endoporus that fits over dehydrating shaft 7.Dehydrating shaft 7 drove dehydrating shaft 7 by clutch shaft 42 and rotates by braked wheel and 42 fastening being connected of clutch shaft, thereby drove the dehydration barrel of Xian's clothing machine.
Impeller shafts 6 is installed with the first oiliness bearing 93 and the second oiliness bearing 94, and is fitted in the endoporus of dehydrating shaft 7 by the first oiliness bearing 93 and 94 rotations of the second oiliness bearing, and 6 of the upper aperture of dehydrating shaft 7 and impeller shafts are equipped with small sealing ring 82.
Dc brushless motor outer rotor 22 upper end edge peripheries of the present invention are shaped with boss shoulder 222, and Hall element feedback component 23 lower end edges have kink, and boss shoulder 222 matches with the kink clearance distance.
Operation principle of the present invention is such:
When washing of drum type washing machine: the washing machine tractor is failure to actuate, trip(ping) lever 45 withstands clutch pressing plate 46, clutch pressing plate 46 rotates centered by rotation mandrel 47, clutch slider 43 is promoted downwards, the periphery spline of axle sleeve 41 is separated with the spline that leads in interior week of clutch slider 43, realization power shaft 3 separates with clutch shaft 42, thereby realize the fully solution pine of washing machine inner tub and impeller dish, in this simultaneously because annulus boss 431 compression brake springs 44 accumulation of energys of clutch slider 43 are also passed through in the slip of clutch slider 43.Dc brushless motor outer rotor 22 will the both forward and reverse directions frequency conversion rotate washing under the co-controlling of control circuit board of washer and drive circuit board like this, the output of dc brushless motor outer rotor 22 direct driving forces drives power shaft 3 rotations, power shaft 3 drives impeller shafts 6 positive and negative frequency conversion washings by gear reduction system 5, braked wheel is because clutch slider 43 is separated pine with power shaft 3 fully under the effect of clutch pressing plate 46, when therefore impeller shafts 6 drives Washing machine wave wheel disc both forward and reverse directions frequency conversion rotation washing, laundry of washing machine, the reaction force of current and gear reduction system 5 drives lower, regular backward rotation appears in washing machine inner tub, thereby realizes that Washing machine wave wheel disc and interior bucket carry out the washing of frequency conversion Bionic hand rubbing to clothing in the other direction simultaneously.
When laundry machine dehydration: push rod 49 is pushed trip(ping) lever 45 open under the promotion of washing machine tractor, extension spring 461 is with 46 pull-ups of clutch pressing plate, clutch slider 43 moves down under the promotion of brake spring 44, the spline joint of the spline of the spline of clutch shaft 42 and axle sleeve 41 and clutch slider 43 together, thereby Washing machine wave wheel disc and dehydration barrel are connected as a single entity.The 3 clockwise frequency conversion dehydrations of dc brushless motor outer rotor are rotated, and clutch shaft 41 drives dehydrating shaft 7 by the braked wheel that is fastenedly connected, and realizes that the frequency conversion of washing machine inner tub is dewatered clockwise.When dehydration end or brake hard, adopt the logical reversing the current of motor to realize electromagnetic braking.
Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.
Claims (2)
1. Bionic hand rubbing variable frequency speed reducing clutch for washing machine, comprise equipped mutually lower house (11) and power shaft (3), on the cylindrical convex shoulder of described lower house (11) DC. brushless electric machine stator is installed, the end of power shaft (3) is connected with dc brushless motor outer rotor (22), it is characterized in that: described DC. brushless electric machine stator is arranged in the inner chamber of dc brushless motor outer rotor (22), and described power shaft (3) is fitted with by axle sleeve (41), clutch shaft (42), the slide engaging and disengaging mechanism that clutch slider (43) and brake spring (44) form; Axle sleeve (41) pin key type cover fits on the power shaft (3), and the upper end of axle sleeve (41) is pushed up mutually with the lower end boss side surfaces (31) of power shaft (3) and is joined, the bottom of axle sleeve (41) cooperates the location with the via hole boss (221) of dc brushless motor outer rotor (22), described clutch shaft (42) is positioned at axle sleeve (41) top turning set and is contained on the power shaft (3), axle sleeve (41) and clutch shaft (42) all are shaped with the periphery spline, described clutch slider (43) is shaped with interior week, the guiding spline was matched with the periphery spline slip of axle sleeve (41) and clutch shaft (42), and described brake spring (44) press fit over that annulus boss (431) that clutch slider (43) periphery is shaped with is gone up and clutch slider (43) is connected with clutch control mechanism; Described clutch control mechanism comprises trip(ping) lever (45), clutch pressing plate (46), rotation mandrel (47), rotating shaft fixed block (48) and push rod (49); Described clutch slider (43) is connected with clutch pressing plate (46), and clutch pressing plate (46) is equipped mutually with rotating shaft fixed block (48) take rotation mandrel (47) as axis of rotation, clutch pressing plate (46) is equipped with extension spring (461), described rotating shaft fixed block (48) is fixedly mounted on the lower house (11) through screw, and described trip(ping) lever (45) matches with clutch pressing plate (46) and push rod (49) respectively; Described DC. brushless electric machine stator is plastic package brushless direct current motor stator (21), plastic package brushless direct current motor stator (21) is fitted with Hall element feedback component (23) through stator trip bolt (24) and fastening being connected of lower house (11) on the convex shoulder that plastic package brushless direct current motor stator (21) is shaped with; And the upper end edge (22a) of dc brushless motor outer rotor (22) matches with the lower end edge gap of Hall element feedback component (23); The endoporus of described clutch shaft (42) is fitted with respectively the 3rd oiliness bearing (95) and the 4th oiliness bearing (96) in two ends up and down, clutch shaft (42) rotates equipped mutually through the 3rd oiliness bearing (95) and the 4th oiliness bearing (96) and power shaft (3), the inner fovea part of described lower house (11) is embedded with the second spring bearing (92), fastening being connected of periphery bearing boss (421) of the inner ring of the second spring bearing (92) and clutch shaft (42), described power shaft (3) is connected with impeller shafts (6) through gear reduction system (5); Described lower house (11) upper end is fitted with upper shell (12), the inner fovea part of upper shell (12) is embedded with the first spring bearing (91), upper shell (12) is fitted with dehydrating shaft (7) through the first spring bearing (91), the periphery bearing installed surface of described dehydrating shaft (7) matches with the inner ring side face interference of the first spring bearing (91), dehydrating shaft (7) is equipped with large sealing packing ring (81) with the place, assembling aperture of upper shell (12), and described impeller shafts (6) rotational support is worn in the endoporus that fits over dehydrating shaft (7); When dehydration end or brake hard, adopt the logical reversing the current of motor to realize electromagnetic braking; Described impeller shafts (6) is fitted in the endoporus of dehydrating shaft (7) through the first oiliness bearing (93) and the second oiliness bearing (94) rotation, between the upper aperture of dehydrating shaft (7) and impeller shafts (6) small sealing ring (82) is installed.
2. Bionic hand rubbing variable frequency speed reducing clutch for washing machine according to claim 1, it is characterized in that: described dc brushless motor outer rotor (22) upper end edge periphery is shaped with boss shoulder (222), Hall element feedback component (23) lower end edge has kink, and described boss shoulder (222) matches with the kink clearance distance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110203699 CN102277710B (en) | 2011-07-20 | 2011-07-20 | Variable-frequency speed-reducing clutch of bionic hand rubbing of washing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110203699 CN102277710B (en) | 2011-07-20 | 2011-07-20 | Variable-frequency speed-reducing clutch of bionic hand rubbing of washing machine |
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| CN102277710A CN102277710A (en) | 2011-12-14 |
| CN102277710B true CN102277710B (en) | 2013-01-30 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628280B (en) * | 2012-08-28 | 2016-07-06 | 宁波吉德电器有限公司 | A kind of can the automatic washing machine of multiple washing |
| CN103628279B (en) * | 2012-08-28 | 2016-07-06 | 宁波吉德电器有限公司 | A kind of speed-reducing clutch of automatic washing machine |
| WO2014178531A1 (en) * | 2013-04-30 | 2014-11-06 | New Motech Co., Ltd. | Driving apparatus for washing machine |
| KR101548419B1 (en) | 2013-04-30 | 2015-08-28 | 뉴모텍(주) | Driving apparatus for washing machine |
| CN104372561B (en) * | 2013-08-15 | 2018-08-07 | 青岛海尔洗衣机有限公司 | A kind of frequency conversion hand-scrubbing type decelerating through motor arrangement of clutch and washing machine |
| CN104911867B (en) * | 2014-03-10 | 2017-09-29 | 海尔集团技术研发中心 | A kind of control method of brake apparatus, the washing machine with this device and washing machine |
| CN107083644B (en) * | 2017-06-14 | 2019-10-22 | 常州新亚电机有限公司 | A kind of washing machine drive system and washing machine |
| WO2021109113A1 (en) * | 2019-12-06 | 2021-06-10 | Haier Us Appliance Solutions, Inc. | Washing machine appliance and motor assembly therefor |
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| CN1384239A (en) * | 2001-05-08 | 2002-12-11 | Lg电子株式会社 | Directly driven washing machine |
| CN1536150A (en) * | 2003-04-11 | 2004-10-13 | 乐金电子(天津)电器有限公司 | Clutch of washing machine |
| CN101280505A (en) * | 2008-05-12 | 2008-10-08 | 合肥荣事达洗衣设备制造有限公司 | Novel direct driving apparatus of washing machine |
| CN201420182Y (en) * | 2009-05-21 | 2010-03-10 | 宁波普尔机电制造有限公司 | Rubbing type variable-frequency speed reducing clutch for washing machine |
| CN202157204U (en) * | 2011-07-20 | 2012-03-07 | 宁波普尔机电制造有限公司 | Bionic hand rubbing variable frequency speed reducing clutch for washing machine |
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2011
- 2011-07-20 CN CN 201110203699 patent/CN102277710B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1384239A (en) * | 2001-05-08 | 2002-12-11 | Lg电子株式会社 | Directly driven washing machine |
| CN1536150A (en) * | 2003-04-11 | 2004-10-13 | 乐金电子(天津)电器有限公司 | Clutch of washing machine |
| CN101280505A (en) * | 2008-05-12 | 2008-10-08 | 合肥荣事达洗衣设备制造有限公司 | Novel direct driving apparatus of washing machine |
| CN201420182Y (en) * | 2009-05-21 | 2010-03-10 | 宁波普尔机电制造有限公司 | Rubbing type variable-frequency speed reducing clutch for washing machine |
| CN202157204U (en) * | 2011-07-20 | 2012-03-07 | 宁波普尔机电制造有限公司 | Bionic hand rubbing variable frequency speed reducing clutch for washing machine |
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