EP2452006A1 - Support spider for the drum of a washing machine - Google Patents
Support spider for the drum of a washing machineInfo
- Publication number
- EP2452006A1 EP2452006A1 EP10744730A EP10744730A EP2452006A1 EP 2452006 A1 EP2452006 A1 EP 2452006A1 EP 10744730 A EP10744730 A EP 10744730A EP 10744730 A EP10744730 A EP 10744730A EP 2452006 A1 EP2452006 A1 EP 2452006A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spider
- seat
- drum
- screw
- wall portions
- 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
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/206—Mounting of motor
-
- 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
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
-
- 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
- D06F37/26—Casings; Tubs
- D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
- D06F37/269—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for the bearing of the rotary receptacle
Definitions
- the present invention relates to a spider for laundry treating machines equipped with a rotary drum according to the preamble of claim 1.
- Laundry treating machines such as washing machines, washing/drying machines and clothes dryers, are typically equipped with a rotary drum.
- Motion is generated by a motor, usually an electric one, and is then transmitted to the drum, which is free to rotate about an axis, whether vertical, horizontal or inclined
- spider will refer to the transmission unit that transmits the motion from the motor shaft to the drum while also acting as a support for the latter.
- Known spiders normally comprise three arms spaced at 120° apart and extending from a common hub, which is coupled to a transmission shaft driven by the motor.
- each spider arm has one or more seats for one or more screws, e.g. one pair of screws, for coupling it to the drum edge;
- the seat is typically cylindrical and threaded, and its axis is perpendicular to that of the motor shaft.
- Said threaded seat is very important because this is the point where the strains originating from the exchange of forces between the drum and the spider concentrate; it is therefore of primary importance that said threaded seat is strong and manufactured with the utmost care.
- Prior-art spiders are typically made of metal (because of the loads that they must withstand in operation) and are manufactured by die casting; the aforementioned threaded seats can be obtained on such spiders in two ways: by starting from a solid piece, which is then machined through chip removal machining, or by designing the die appropriately to include such seats.
- the cylindrical seat for the drum edge coupling screw is first drilled (by using a drilling machine) and then tapped internally. This implies a certain production cost for manufacturing the part, due to the fact that mechanical machining is required in addition to the die casting process.
- the threaded seat for the drum edge coupling screw is obtained in the die by using suitable pins.
- the present invention relates to a spider for laundry treating machines equipped with a rotary drum, wherein the seat for the screw used for coupling the spider to the machine drum is defined by at least a first and a second perimetric wall portions, said portions extending on a semicylindrical profile and being arranged at different heights.
- the present invention also relates to a method for manufacturing such a spider.
- the present invention further relates to a laundry treating machine, such as a washing machine, a washing/drying machine, a clothes dryer or the like, equipped with a rotary drum supported by a spider according to the present invention.
- a laundry treating machine such as a washing machine, a washing/drying machine, a clothes dryer or the like, equipped with a rotary drum supported by a spider according to the present invention.
- the present invention is based on the idea of simplifying the seat creation step by using a single-movement die and by allowing the use of a metric self-tapping screw for tapping the seat, since the chip formed when inserting the screw is easily evacuated and the spider is thus prevented from being damaged during the removal of the screw.
- the screw seat is defined by opposite and alternated portions which can be obtained through a pressing operation by using a single-movement die, which is beneficial in terms of costs and production times.
- Fig. 1 is a perspective view of a spider according to the present invention
- Fig. 2 is a sectional view of one of the arms of the spider of Fig. 1;
- Fig. 3 is a sectional view of the end portion of the spider of Fig. 2;
- Fig. 4 is a sectional view of the end portion of the spider of Fig. 3 when mounted on the drum;
- Fig. 5 is a perspective view of the end portion of the spider of Fig. 3;
- Fig. 6 is a different perspective view of the end portion of the spider of Fig. 3;
- Fig. 7 shows a step for in-die production of the spider of the present invention.
- a spider 1 according to the present invention.
- the spider 1 acts as a unit for transmitting the motion generated by the motor (through the drive shaft 4) to the drum, as well as a support for the drum itself.
- the drum and the spider 1 are secured to each other through fastening screws, for which suitable seats are provided on the free end portion of each arm 2, 2 A and 2B.
- the spider is secured to the perimetric edge of the drum by means of one screw per arm, which screw is substantially perpendicular to the axis of the shaft 4.
- the holes 5, 5A and 5B are installation reference holes.
- the drum C as shown in Fig. 4, has a cupped edge Cl which is engaged by the screw 7 tightened into the housing seat 6.
- the housing seat 6 is defined by three perimetric wall portions 16,
- each arm is provided with a screw and a respective seat, but more in general the teachings of the present invention are also applicable to two or more seats for a corresponding number of screws.
- perimetric wall portions 16, 26, 36 are three, but more in general there may be two, four or five of them without departing from the teachings and scope of the present invention.
- Said perimetric wall portions 16, 26, 36 that define the housing seat 6 are arranged in such a way as to be opposed to each other in an alternate fashion.
- opposite means herein that there is at least one plane passing through the axis of the cylindrical seat which does not intersects said regions and which separates the cylindrical surface into two semicylindrical surfaces, said portions 16, 26, 36 being arranged in an alternate fashion on said semicylindrical surface;
- in an alternate fashion means herein that, being said portions arranged at different heights measured along the axis of said cylindrical seat starting from any point of origin, when arranging the portions according to a criterion of increasing height, successive portions will lie on different semicylindrical surfaces.
- a discontinuous helicoidal path is defined (resulting in a discontinuous thread).
- the arm 2 is produced by pressing, simply by obtaining the housing seat 6, as will be described below, by tapping the initially unthreaded perimetric wall portions 16, 26, 36.
- the thread is obtained by using a self-tapping screw 7 which is screwed into the seat 6, thereby removing the necessary chip from the perimetric wall portions 16, 26, 36.
- the removed chip is easily evacuated because the thread does not follow a continuous helicoidal path, but features interruptions due to the alternation between the perimetric walls 16, 26, 36, which are arranged opposite to each other in at least one section and in an alternate fashion.
- the seat 6 ends towards the edge Cl with an open countersink 46 which is entered into and seized by the widened head of the screw 7, as shown in Fig. 4.
- the step of manufacturing the spider 1 is concerned, it is obtained by pressing.
- Fig. 7 there is shown a detail of the step of pressing the free end of the arm 2 of the spider 1.
- S2 is the matrix of the die and Sl is the punch, and they are made in such a way as to define the housing seat 6 by creating the perimetric wall portions 16, 26,
- arrows in Fig. 7 also highlight the directions of the main movement, by which the die provided by the matrix S2 and the punch Sl is opened.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000520A ITTO20090520A1 (en) | 2009-07-10 | 2009-07-10 | CRUISE FOR MACHINES FOR THE TREATMENT OF CLOTHS PROVIDED WITH A ROTATING BASKET AND METHOD OF MANUFACTURE. |
PCT/IB2010/053076 WO2011004313A1 (en) | 2009-07-10 | 2010-07-05 | Support spider for the drum of a washing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2452006A1 true EP2452006A1 (en) | 2012-05-16 |
EP2452006B1 EP2452006B1 (en) | 2017-08-23 |
Family
ID=41698074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10744730.2A Not-in-force EP2452006B1 (en) | 2009-07-10 | 2010-07-05 | Support spider for the drum of a washing machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2452006B1 (en) |
IT (1) | ITTO20090520A1 (en) |
WO (1) | WO2011004313A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015096926A1 (en) * | 2013-12-27 | 2015-07-02 | Arcelik Anonim Sirketi | A drum with improved mechanical strength and the production method thereof |
CN107938253A (en) * | 2017-12-11 | 2018-04-20 | 珠海格力电器股份有限公司 | Washing machine bracket, washing machine using same and structure optimization method |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1460836A1 (en) * | 1963-03-22 | 1969-04-30 | Bosch Hausgeraete Gmbh | Washing machine |
DE1918651A1 (en) * | 1969-04-12 | 1971-01-28 | Hoesch Ag | Support star for washing machine drums |
AU521357B2 (en) * | 1977-09-26 | 1982-04-01 | Fisher & Paykel Limited | Bowl or tub |
DE19532783A1 (en) * | 1994-09-06 | 1996-03-07 | Miele & Cie | Mounting mechanism for washing machine drum |
IT1313196B1 (en) * | 1999-07-21 | 2002-06-17 | Miramondi Srl | HIGH SPEED CENTRIFUGE WASHING MACHINE BASKET, WASHING MACHINE BASKET PROVIDED WITH THE ABOVE CRUISE AND |
KR101224391B1 (en) * | 2005-12-13 | 2013-01-22 | 삼성전자주식회사 | Drum washing machine and method for assembling shaft system thereof |
-
2009
- 2009-07-10 IT IT000520A patent/ITTO20090520A1/en unknown
-
2010
- 2010-07-05 EP EP10744730.2A patent/EP2452006B1/en not_active Not-in-force
- 2010-07-05 WO PCT/IB2010/053076 patent/WO2011004313A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2011004313A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011004313A1 (en) | 2011-01-13 |
EP2452006B1 (en) | 2017-08-23 |
ITTO20090520A1 (en) | 2011-01-11 |
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