EP0988411A1 - Antriebsvorrichtung für eine waschmaschine - Google Patents
Antriebsvorrichtung für eine waschmaschineInfo
- Publication number
- EP0988411A1 EP0988411A1 EP98939494A EP98939494A EP0988411A1 EP 0988411 A1 EP0988411 A1 EP 0988411A1 EP 98939494 A EP98939494 A EP 98939494A EP 98939494 A EP98939494 A EP 98939494A EP 0988411 A1 EP0988411 A1 EP 0988411A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- rotor
- bell
- drive device
- tub
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
- D06F37/304—Arrangements or adaptations of electric motors
Definitions
- the invention relates to a drive device for a washing machine with a washing drum mounted within a bearing sleeve of a rigid support part attached to a bottom wall of a tub via an at least approximately horizontal shaft, which is directly driven by a flat motor also attached to the back of the tub.
- Such drive devices are known from DE 39 27 426 A1 and DE 43 41 832 A1.
- the stator of the motor designed as a brushless external rotor direct current motor is fastened directly on the bearing sleeve of the rigid support part.
- the shaft is mounted in the bearing sleeve and is connected at its outer end to the rotor of the motor in a rotationally fixed manner.
- This rotor is a so-called external rotor, which overlaps the stator windings as a pot and carries poles designed as permanent magnets.
- the motor is additionally surrounded by an insulation hood, which dampens noise radiated directly from the motor to the surrounding atmosphere.
- the known drive devices encapsulate the stator, which is exposed to a considerable temperature load due to current heat in its windings, by a pot-shaped rotor (in the case of DE 43 41 832 A1 additionally by the sound insulation hood) so strongly that cooling of the motor fails at all. This is supported above all by the fact that such a directly driving motor can hardly be cooled independently by the rotating rotor because of its necessarily low inherent speeds. Hence the well-known Drive devices can practically only be used if they are protected from rapid overheating by external cooling.
- the known drive devices are also not available as a fully assembled motor to the manufacturer of washing machines. Your stands and runners must be delivered separately and assembled in the washing machine factory. Since special assembly devices for completing motor assemblies are generally not available in a washing machine plant and are also not desired, the stator assembly that is initially to be connected to the tub system should only be inaccurately completed by the external rotor assembly. Since the maintenance of a small air gap between the stator and the rotor poles, which is as large as possible for each specimen, as well as the centered storage are extremely high requirements that cannot be met in the aforementioned assembly in a washing machine factory, the known drive devices are practical only of limited use.
- the invention has for its object to make the drive device referred to above less expensive.
- the engine should be able to be completed and checked in the engine manufacturer's factory before it is installed at a washing machine manufacturer, and finally designed so that it can also take on the carrying function of the tub.
- stator of the motor is connected to the bottom wall of the tub instead of the rigid support part and has a central bearing sleeve with one or two spaced roller bearings for the shaft of the rotor, which at its end facing the laundry drum has a concentric bore for receiving the shaft of the laundry drum, which extends approximately into the plane of the drum-side roller bearing, that the rotor has a bell attached to the outer end of its shaft, the edge of which points towards the tub, and that a number of excitation windings with laminated cores on the stand are distributed in a circle, which face magnetizable poles distributed over air gaps on the inner circumference of the bell edge.
- the configuration according to the invention gives the motor a cost-effective design, by means of which shorter shaft journals on the laundry drum are possible, which requires less installation space during transport; because the motor already takes up the required installation space with its already necessary wavelength.
- the formation of the stand with the elements of a rigid support part allows the support star to be replaced for the tub. This saves additional costs on the construction of the tub.
- the engine can be fully assembled and tested in the engine supplier's factory.
- the appropriate assembly and testing aids are available there, so that precisely assembled motor assemblies can always be delivered to the washing machine factory.
- the shaft of the laundry drum inserted into the concentric bore is fastened in the bore with a lag screw from outside the rotor shaft
- this assembly can be mounted on the bottom wall instead of a cast star which is otherwise usual at this point of the tub system, the stands of the complete motor, for example, are attached to the circumference of the bottom wall of the tub by means of several screws before the shaft of the laundry drum is inserted into the hub of the rotor from the front.
- the rotor was already connected to the stand via the roller bearings and was secured from behind with a central screw.
- the shaft of the washing drum and the bore matched cones have a slight inclination
- the seat of the washing drum shaft in the shaft of the rotor can be considerably improved without a possible risk of loosening the tension screw.
- the cones can have an angle of inclination which leads to self-locking in the case of the given material pairing. Then the risk of loosening is almost eliminated.
- a further development of the invention is of great advantage, in which the rotor shaft and the bell are detachably connected to one another.
- the excitation windings are very accessible due to the bell, which can be removed together with the magnetizable poles. An exchange of such a pathogen winding in the event of a defect is therefore not an affair.
- the stator can be provided with an annular part of its part which runs essentially parallel to the base wall of the tub and with a collar-like part for fastening the field windings on the one hand and the rotor with its bell and its edge on the other form an annular cavity.
- the motor can also be designed such that the gaps between the edge and the annular stator part on the one hand and between the bell and the collar-like stator part on the other hand are sealed by labyrinthine shaping against the penetration of magnetizable foreign bodies.
- FIG. 1 shows a schematic representation of a washing machine tub with an internally horizontally mounted washing drum, the drive shaft of which is mounted together with the hub of the rotor bell in the bearing sleeve of the stand and
- Fig. 2 is an enlarged and sectional view of another example of an engine according to the invention and mounted on the bottom wall.
- the tub 1 is swingingly mounted in a housing of a washing machine, also not shown, in a manner not shown here.
- On its front wall 2 it has an opening 3 for loading and unloading the laundry drum 4, which is rotatably mounted in the bottom wall 6 of the tub 1 about the horizontal axis 5.
- a motor 9 is mounted on the bottom wall 6 of the tub 1, the stator support part 10 of which is connected in a rotationally fixed manner to the periphery of the bottom wall 6 via the flange 11.
- Several excitation windings 12 are distributed on the collar-like part 16 of the annular part 17 of the part of the stator 10 which runs essentially parallel to the bottom wall 6 and correspond during rotation of the rotor 13 via air gaps 37 alternately with its magnetizable poles 14, which are also segment-like on the inner circumference the edge 15 of the bell 18 of the rotor 13 are distributed.
- the magnetic return flow of the magnetic segments 14 is formed via the ferromagnetic edge 15.
- the motor can introduce its drive torques directly into the washing drum 4 via the shaft journal 7.
- the stator 10 of the motor like a supporting star replaced by it, also absorbs all bearing forces.
- the shaft 7 of the laundry drum 4 is kept very short and protrudes into a short cone 19 of the rotor shaft 20.
- This shaft 20 is supported by roller bearings 21 and 22 in a bearing sleeve 23 of the stand 10 and extends with its end facing the laundry drum 4 (cone 19) down to the level of the inner roller bearing 22.
- the laundry drum 4 with its short shaft 7 takes up only a small storage space for possible transports compared to known drive devices of this type.
- the concentric bore 28 can run out into a cone 19 with a flat angle, which is suitable for holding the shaft 7 in a friction fit on the shaft 20 of the rotor 13 given the material combination. Then, during maintenance work, the shaft 7 can still be held securely in the cone 19 even after the tension screw 29 has been removed. Since the stand 10 replaces an otherwise usual support star for the tub 1, a special component can be saved.
- the bottom wall 8 of the laundry drum 4 is stiffened with a support star, which is part of the stand 10.
- the supporting star has three spokes, of which the two spokes pointing downwards extend from the plane of the drawing and are therefore not visible. Only the upwardly directed spoke 24 is visible in the sectional drawing in FIG. 2.
- the bent flange 26 of the bottom wall 6 of the tub is firmly connected to the support star by means of screws 27.
- the bearing sleeve 23 of the stator 10 contains bearing seats for rolling bearings 21 and 22, the inner rings of which are fitted onto the rotor shaft 20 with a good fit.
- the washing drum shaft 7 is inserted into the concentric bore 28 of the shaft 20 of the rotor 13 and secured by means of a central tension screw 29, so that it drives the rotor 13 via its shaft 20 and the inner rings of the roller bearings 21 and 22 rotatably connects to the laundry drum 4.
- the ring-shaped part 17 of the stand 10 carries on its side facing away from the tub a short cylindrical part 30 with an attachment 31 attached to the outside.
- a collar-like part 16 is attached to the ring-shaped part 17 of the stand with a smaller radius but greater depth Excitation windings 12 are attached.
- the edge of the collar-like part 16 dips into an inner annular groove 32 of the bell 18 of the rotor 13. Both form a labyrinth seal 33 with one another.
- the edge 15 of the bell 18 also plunges like a labyrinth into the shoulder 31 of the cylindrical part 17, so that a labyrinth seal 34 is also formed there.
- the rotor bell 18 is for better ventilation and cooling of the field windings 12 and magnetizable poles 15 between their shaft 20 and the bell rim 15 equipped with openings 35 near the labyrinth seal 33.
- openings can advantageously be shaped at their edges so that the access of cooling air through these openings is supported in the sense of a fan effect.
- so-called vertebrates can be attached to the openings or in the vicinity thereof, which ensure that the cooling air is swirled so that it receives better contact with the excitation windings 12 or the collar-like part 16 on which they are mounted.
- the motor is designed here as an electronically commutated DC motor. However, it can also be designed as a so-called switched reluctance motor. In this case, at least the edge 15 of the rotor bell 18 or its inner support consists of a ferromagnetically relatively poorly conductive material.
- the structure of the stator is comparable to that of an electronically commutated DC motor.
- the advantage of the reluctance motor is, in particular, a more cost-effective design of the rotor (no expensive magnetic materials).
- the rotor bell 18 is connected to the shaft 20 of the rotor 13 via the same lag screw 29, which is used to fasten the shaft 7 of the laundry drum 4.
- a large-area washer 36 with a pot-like depression is pressed into the depression for the head of the screw 29.
- This type of connection is sufficient for the purpose of transporting the motor. Then it is finally secured by the lag screw 29.
- this screw connection can be positively supplemented in a manner not shown
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19724930 | 1997-06-12 | ||
DE19724930A DE19724930A1 (de) | 1997-06-12 | 1997-06-12 | Antriebsvorrichtung für eine Waschmaschine |
PCT/EP1998/003421 WO1998056974A1 (de) | 1997-06-12 | 1998-06-08 | Antriebsvorrichtung für eine waschmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0988411A1 true EP0988411A1 (de) | 2000-03-29 |
EP0988411B1 EP0988411B1 (de) | 2002-10-02 |
Family
ID=7832320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98939494A Expired - Lifetime EP0988411B1 (de) | 1997-06-12 | 1998-06-08 | Antriebsvorrichtung für eine waschmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US6050113A (de) |
EP (1) | EP0988411B1 (de) |
DE (2) | DE19724930A1 (de) |
ES (1) | ES2185198T3 (de) |
TR (1) | TR199903045T2 (de) |
WO (1) | WO1998056974A1 (de) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19726246A1 (de) † | 1997-06-20 | 1998-12-24 | Bosch Siemens Hausgeraete | Antriebsvorrichtung für eine Waschmaschine |
DE19755537A1 (de) * | 1997-12-13 | 1999-06-17 | Fhp Motors Gmbh | Transportsicherung für einen Motorbausatz eines kollektorlosen Gleichstrommotors als Außenläufermotor |
DE19819410A1 (de) * | 1998-04-30 | 1999-12-30 | Miele & Cie | Verfahren zur Herstellung eines Wäschebehandlungsgeräts bzw. zur Montage eines Antriebsmotors bei einem solchen Wäschebehandlungsgerät |
DE19859567A1 (de) * | 1998-12-22 | 2000-06-29 | Bsh Bosch Siemens Hausgeraete | Antriebsvorrichtung für eine von vorn beschickbare Waschmaschine |
DE19922610A1 (de) | 1999-05-17 | 2000-11-23 | Bsh Bosch Siemens Hausgeraete | Antriebsvorrichtung für eine Waschmaschine |
DE19922611A1 (de) * | 1999-05-17 | 2000-11-23 | Bsh Bosch Siemens Hausgeraete | Antriebsvorrichtung für eine Waschmaschine |
AU782017B2 (en) | 1999-10-18 | 2005-06-30 | Lg Electronics Inc. | A driving unit for a drum type washing machine |
DE19960501A1 (de) | 1999-12-15 | 2001-06-21 | Bsh Bosch Siemens Hausgeraete | Laugenbehälter für eine Waschmaschine |
DE10058409A1 (de) * | 2000-11-24 | 2002-05-29 | Bsh Bosch Siemens Hausgeraete | Verfahren und Vorrichtung zur Montage eines Außenläufers |
DE10058407A1 (de) * | 2000-11-24 | 2002-05-29 | Bsh Bosch Siemens Hausgeraete | Verfahren und Vorrichtung zur Montage eines Außenläufers |
JP2002315245A (ja) * | 2001-04-09 | 2002-10-25 | Moric Co Ltd | 永久磁石式発電機のロータ |
US7342334B2 (en) * | 2004-10-29 | 2008-03-11 | Emerson Electric Co. | Insulated stator with wire routing element |
KR100662150B1 (ko) * | 2005-08-30 | 2006-12-27 | 엘지전자 주식회사 | 세탁기 |
PL2119819T3 (pl) * | 2008-05-14 | 2013-08-30 | Whirlpool Co | Pralka z systemem napędu bezpośredniego |
US8405268B2 (en) | 2010-02-18 | 2013-03-26 | Nidec Motor Corporation | Stator with monolithic mounting bosses and assembly comprising the same |
AU2011345450C1 (en) * | 2010-12-22 | 2015-11-19 | Fisher & Paykel Appliances Limited | Improved appliance, motor or stator |
US9206540B2 (en) * | 2011-03-23 | 2015-12-08 | Lg Electronics Inc. | Washing machine |
US9587105B2 (en) | 2012-02-23 | 2017-03-07 | Basf Se | Fluorinated acrylate block copolymers with low dynamic surface tension |
DE102012024703A1 (de) * | 2012-12-18 | 2014-06-18 | Robert Bosch Gmbh | Lagerhülse mit Manschette |
KR102252508B1 (ko) | 2015-01-05 | 2021-05-14 | 엘지전자 주식회사 | 세탁기 |
US10125446B2 (en) | 2015-12-01 | 2018-11-13 | Whirlpool Corporation | Laundry treating appliance |
US10036114B2 (en) | 2015-12-01 | 2018-07-31 | Whirlpool Corporation | Laundry treating appliance |
US10487432B2 (en) | 2015-12-01 | 2019-11-26 | Whirlpool Corporation | Laundry treating appliance |
US10053808B2 (en) | 2015-12-01 | 2018-08-21 | Whirlpool Corporation | Laundry treating appliance |
KR102646735B1 (ko) * | 2016-11-04 | 2024-03-13 | 삼성전자주식회사 | 세탁기용 모터 및 이를 구비하는 세탁기 |
CN109722839B (zh) * | 2017-10-27 | 2021-08-03 | 青岛海尔洗涤电器有限公司 | 一种洗衣机 |
CN107663743B (zh) * | 2017-10-31 | 2021-07-23 | 青岛胶南海尔洗衣机有限公司 | 一种洗衣机外桶及洗衣机 |
KR102557578B1 (ko) | 2018-08-23 | 2023-07-20 | 엘지전자 주식회사 | 세탁장치 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE631280A (de) * | 1962-04-19 | |||
FR1555088A (de) * | 1967-09-29 | 1969-01-24 | ||
DE3927426B4 (de) * | 1989-08-19 | 2006-02-23 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Antriebseinheit für eine Wäsche-Behandlungsmaschine |
DE4335966C2 (de) * | 1993-10-21 | 1998-07-16 | Fhp Motors Gmbh | Antriebsvorrichtung für eine Wasch- oder eine ähnliche Maschine mit einem kollektorlosen Gleichstrommotor |
DE4341832C2 (de) * | 1993-12-08 | 2001-11-08 | Fhp Motors Gmbh | Waschautomat |
DE19546185B4 (de) * | 1995-12-11 | 2010-07-01 | BSH Bosch und Siemens Hausgeräte GmbH | Antriebsvorrichtung für eine von vorn beschickbare Waschmaschine |
DE19547456A1 (de) * | 1995-12-19 | 1997-06-26 | Bosch Siemens Hausgeraete | Antriebsvorrichtung für eine von vorn beschickbare Waschmaschine |
DE19547745A1 (de) * | 1995-12-20 | 1997-06-26 | Bosch Siemens Hausgeraete | Antriebsvorrichtung für eine von vorn beschickbare Waschmaschine |
-
1997
- 1997-06-12 DE DE19724930A patent/DE19724930A1/de not_active Withdrawn
-
1998
- 1998-06-08 EP EP98939494A patent/EP0988411B1/de not_active Expired - Lifetime
- 1998-06-08 TR TR1999/03045T patent/TR199903045T2/xx unknown
- 1998-06-08 WO PCT/EP1998/003421 patent/WO1998056974A1/de active IP Right Grant
- 1998-06-08 ES ES98939494T patent/ES2185198T3/es not_active Expired - Lifetime
- 1998-06-08 DE DE59805817T patent/DE59805817D1/de not_active Expired - Lifetime
- 1998-06-12 US US09/096,976 patent/US6050113A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9856974A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6050113A (en) | 2000-04-18 |
WO1998056974A1 (de) | 1998-12-17 |
DE19724930A1 (de) | 1998-12-17 |
TR199903045T2 (xx) | 2000-06-21 |
EP0988411B1 (de) | 2002-10-02 |
DE59805817D1 (de) | 2002-11-07 |
ES2185198T3 (es) | 2003-04-16 |
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