US20080178635A1 - Mounting Star for a Washing Machine - Google Patents

Mounting Star for a Washing Machine Download PDF

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Publication number
US20080178635A1
US20080178635A1 US11/664,226 US66422605A US2008178635A1 US 20080178635 A1 US20080178635 A1 US 20080178635A1 US 66422605 A US66422605 A US 66422605A US 2008178635 A1 US2008178635 A1 US 2008178635A1
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US
United States
Prior art keywords
supports
arms
mounting star
arm
mounting
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.)
Abandoned
Application number
US11/664,226
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English (en)
Inventor
Uwe Ratfisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Assigned to BSH BOSCH UND SIEMENS HAUSGERATE GMBH reassignment BSH BOSCH UND SIEMENS HAUSGERATE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RATFISCH, UWE
Publication of US20080178635A1 publication Critical patent/US20080178635A1/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • D06F37/264—Tubs provided with reinforcing structures, e.g. ribs, inserts, braces
    • 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 invention relates to a mounting star for stabilizing the rear wall of a drum-type component of a washing machine, and for assembly on it, at least three arms of which component are embodied in the center of the mounting star and include hollow molded bodies with a box-like, open profile, and with support points provided at a distance of a length from the central axis of the mounting star, preferably to approximately the mid-length of each arm, which points serve as a support against the rear wall of the drum-type component.
  • Such mounting stars for a washing drum are disclosed in DE 14 60 840 A1 and DE 24 32 465 A1.
  • Mounting stars with even greater stiffness are required for tubs for transmitting greater forces than are required for a washing drum. They are comprised mainly of cast steel, as disclosed in DE 39 27 166 A1 for example, but are becoming dispensable because tubs are increasingly being produced from plastic and the stiffness is therefore becoming a design element of the tub.
  • the object if the invention is therefore to design a mounting star of the type already described so that it is capable of saving weight and costs, with the lowest possible material consumption, for transmitting the forces acting in washing machines in the region of tubs or washing drums.
  • the open profile of the arms comprises a pair of surfaces which are not connected together and are at least similar to a flat rectangle, which surfaces form the cross-section of supports and are orientated, with one of their short sides, towards the rear wall of the drum-type component, and that the two supports are each connected, at least at the support points, by a third support with a similar cross-sectional surface from arm to arm, to a support of the other arms.
  • This lattice structure provides the best conditions for designing the mounting star with the lowest possible material consumption, yet so that it is so stable that its weight can be reduced by almost 40% compared to a conventional mounting star, but with the same force transmitting capacity. This also results in considerable cost savings as far as the other components of the washing machine are concerned.
  • the supports arranged in pairs are connected together by means of a latticework.
  • the supports required for the transmission of forces on the drum-type component may then be dimensioned exclusively to achieve this object, whilst their dimensional stability in and relative to each other is achieved by the latticework, which can be designed in a filigree fashion.
  • connection of the adjacent supports of two arms at the support points to a further support, which runs outside the central axis, is then sufficient.
  • the arc-shaped supports continue running from the support points with the same curvature in the direction of the arm ends and are connected to each other at the end points of the arms to produce a stable shape of the mounting star arms.
  • the arc-shaped supports continue running from the supports with a greater curvature and intersect to connect to each other before the ends of the arms.
  • a particularly torsionally stiff effect is achieved if the arc-shaped supports terminate at the ends of the arms at certain distance from each other and are connected to each other by means of a cross bracket.
  • the supports of each pair are connected to each other level with the support points by a cross strut.
  • the cross strut may be designed in highly filigree fashion, it provides torsional stiffness in the main supports of the arms.
  • all the arms are advantageously fastened to a bearing hub so that each arc running through the central axis of the mounting star is arranged at a certain distance from the adjacent arc of the adjacent arm. Because of the shaping of the supports, this automatically provides a basic shape for a lattice work that guarantees the dimensional stability of the mounting star.
  • the supports of all the arms are connected to each other, separated by the same fastening distance, with a round for the bearing axis of the washing drum, for stabilizing the rear wall of a washing drum.
  • a mounting star designed according to the invention has a profile that is open towards the sides so that all its components are manufactured from a material in the continuous casting process according to a further advantageous embodiment. This method provides the most favorable conditions for low cost mass production of the mounting star.
  • FIG. 1 shows a washing machine represented diagrammatically in a side view
  • FIG. 2 shows the view of a mounting star that is still normally used for a washing drum according to the state of the art
  • FIG. 3 shows a view of a variant of the lattice structure of a mounting star designed according to the invention, with sharp ending arms,
  • FIG. 4 shows a view according to FIG. 3 of another variant with blunt ending arms
  • FIG. 5 shows a view of a variant of the mounting star according to FIG. 3 with four arms.
  • FIG. 1 shows a front-loading washing machine in a housing 1 , in which an oscillating system 2 , includes a tub 3 and a washing drum 4 mounted horizontally and pivotably therein, which drum can be driven through a shaft journal 5 , a pulley 6 and a belt 7 by an electric motor 8 , is mounted so that it is suspended on springs 9 and stands on shock absorbers 10 .
  • the tub 3 has on its rear side a mounting star 11 that can only be seen from one side, in the center of which mounting star is located a bearing 12 for shaft journal 5 of washing drum 4 .
  • Washing drum 4 is also supported by a mounting star 13 on its rear side, but its center is connected fixedly in terms of rotation to shaft journal 5 so that washing drum 4 can be rotated inside tub 3 concentrically to bearing 12 of the tub.
  • FIG. 2 A three-armed mounting star 13 of prior art is represented in FIG. 2 in a view of its side facing washing drum rear wall 14 .
  • a mounting star comprises a continuous aluminum casting whose arms 15 are profiled in a manner that is shown by the section along line of intersection II-II.
  • the cross-section shows that arms 15 each have five supports 16 to 20 which, viewed in cross-section, stand at least approximately perpendicular on rear wall 14 of washing drum 4 , and lower cords 21 and 22 and upper cords 23 and 24 connecting these supports.
  • These elongated parts of the arms are connected integrally and centrally to each other and to a round 25 which supports shaft journal 5 .
  • mounting stars are also known (not shown) which, for each arm, only have two parallel supports, but here these arms have a larger cross-sectional area than in the case of the mounting star of prior art shown, and are connected to each other by a lower cord and support, for each support, a flange-like upper cord on the side facing away from the rear wall, which upper cord serves on the one hand to stiffen the supports and on the other to fasten the rear wall.
  • FIGS. 3 to 5 exemplary embodiments are represented in FIGS. 3 to 5 .
  • the exemplary embodiment shown in FIG. 3 only contains supports with a cross-section which is very similar to a narrow rectangle, as is seen in the secondary figure to FIG. 3 representing section III-III through support part 27 - 2 . Sections at other points of the supports show the same shapes.
  • the mounting star in FIG. 3 is provided, in a known manner, with a round 25 for the shaft journal (not shown here), on whose circumstance are fitted supports 27 to 29 at regular intervals. Supports 27 to 29 are uniformly bent, and their neutral fibers 30 to 32 intersect at the center of round 25 .
  • Two support parts 27 - 1 and 29 - 2 , 28 - 1 and 27 - 2 , as well as 29 - 1 and 28 - 2 form a pair of supports which constitute the essential part of an arm 33 , 34 and 35 respectively.
  • Supports points 36 to 41 are fitted on them approximately centrally along their length, at which support points third supports 42 to 44 , also arc-shaped, are fitted which provide a mutual support for arms 33 to 35 .
  • Cross struts 45 , 46 and 47 may be inserted between support points 36 and 37 , 38 and 39 and 40 and 41 respectively, to improve the torsional stiffness of the individual supports on their long sections between round 25 and the arm ends.
  • the supports converge at an acute in pairs and are linked by connecting regions 48 to 50 with which they are suitably connected, e.g. by screwing or riveting, to rear wall 14 or other parts of washing drum 4 .
  • a mounting star according to the invention may also be designed with blunt ends of arms 33 to 35 .
  • the force transmitting ends of supports 27 to 29 are again connected to each other by cross brackets 51 to 53 .
  • the third supports 42 to 44 in FIG. 3 are extended beyond support points 36 , 37 and 38 , 39 and 40 , 41 as far as connection regions 48 - 1 , 48 - 2 and 49 - 1 , 49 - 2 and 50 - 1 , 50 - 2 .
  • This provides an arrangement that is more resistant to torsional forces.
  • FIG. 1 In the exemplary embodiment in FIG.
  • cross struts 45 to 47 may be dispensed with because the points of intersection of supports 27 - 1 with 29 - 2 , 28 - 1 with 27 - 2 and 29 - 1 with 28 - 2 already provide sufficient torsional stiffness in supports 27 to 29 .
  • FIG. 5 shows, with reference to an exemplary embodiment with supports of arms 54 to 57 that converge at an acute angle, that a four-arm mounting star can also be designed according to the same principles as in FIG. 3 .
  • the principles of a three-arm variant disclosed in FIG. 4 can be transferred directly to a four-arm variant (without being shown in greater detail here).
  • Arms 54 to 57 assumed to be rather wide, may be of a narrower design by sacrificing the uniformity of the curvatures of the bends.
  • the bends of the supports would initially be bent at a greater angle from round 25 and become flatter towards the tip. However, the bend may also lead to the intersection of the supports, similar to the variant according to FIG. 4 , in a further tight curvature.
  • the principles of this variant would be at least partially applied here.
  • the arc-shaped supports 27 to 29 and 42 to 44 have proved the best for transmitting and transferring the forces generated. If other requirements necessitate this, however, the supports may also have smaller curvatures, or may even be constructed at least approximately straight. However, further support parts in a lattice-type arrangement are required, which means that the weight advantage that can be achieved with the exemplary embodiments represented and optimized is partially lost again. However, there is still a significant advantage over the mounting stars of prior art already represented.
  • the openings of the structures can be sealed by a method not shown in further detail, completely or partially on the side facing away from the rear wall of the washing drum by a cover or filling not participating in the flow of forces from the arms.
  • a covering may be provided by a molded skin of the same material as the supports, or by another material which is connected to the supports by other means, e.g. by gluing.
  • filling may be achieved by foaming the cavities.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
US11/664,226 2004-10-01 2005-09-30 Mounting Star for a Washing Machine Abandoned US20080178635A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004047996.8 2004-10-01
DE102004047996A DE102004047996A1 (de) 2004-10-01 2004-10-01 Tragstern für eine Waschmaschine
PCT/EP2005/054954 WO2006037764A1 (de) 2004-10-01 2005-09-30 Tragstern für eine waschmaschine

Publications (1)

Publication Number Publication Date
US20080178635A1 true US20080178635A1 (en) 2008-07-31

Family

ID=35539667

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/664,226 Abandoned US20080178635A1 (en) 2004-10-01 2005-09-30 Mounting Star for a Washing Machine

Country Status (7)

Country Link
US (1) US20080178635A1 (de)
EP (1) EP1797233A1 (de)
KR (1) KR20070057227A (de)
CN (1) CN101057020A (de)
DE (1) DE102004047996A1 (de)
EA (1) EA009991B1 (de)
WO (1) WO2006037764A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090211311A1 (en) * 2007-06-29 2009-08-27 Mcmaster William J Basket assembly for a washing machine
US20100058816A1 (en) * 2008-09-09 2010-03-11 Samsung Electronics Co., Ltd. Drum type washing machine
WO2018048314A1 (en) * 2016-09-08 2018-03-15 Fisher & Paykel Appliances Limited Appliance direct-drive motor mounting arrangement
US20180163334A1 (en) * 2016-02-25 2018-06-14 Tcl Home Appliances (Hefei) Co., Ltd. Washing machine inner cylinder assembly and drum-type washing machine
US10487435B2 (en) 2017-03-23 2019-11-26 Midea Group Co., Ltd. Tub for a laundry washing machine
US10975513B2 (en) 2017-03-23 2021-04-13 Midea Group Co., Ltd. Tub with bearing housing insert for a laundry washing machine
WO2022124807A1 (ko) * 2020-12-09 2022-06-16 삼성전자주식회사 세탁기
US11859334B2 (en) 2020-12-09 2024-01-02 Samsung Electronics Co., Ltd. Washing machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013221288A1 (de) 2013-10-21 2015-04-23 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Herstellen einer Anordnung für ein Haushaltsgerät, Anordnung und Haushaltsgerät zur Pflege von Wäschestücken
DE102014208656A1 (de) 2014-05-08 2015-11-12 BSH Hausgeräte GmbH Haushaltsgerät zur Pflege von Wäschestücken mit einem spezifisch ausgebildeten Bereich zwischen einer Trommel und einem Tragstern
CN106968082B (zh) * 2017-03-29 2019-09-17 无锡小天鹅电器有限公司 用于滚筒洗衣机的三脚架及具有其的滚筒洗衣机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6510716B1 (en) * 1999-10-19 2003-01-28 Lg Electronics Inc. Structure of driving unit in drum type washing machine
US20030131637A1 (en) * 2002-01-17 2003-07-17 Hee-Tae Lim Inner tub for washing machine
US20050103060A1 (en) * 2002-05-17 2005-05-19 Ozturk Umud E. Drum
US20050160772A1 (en) * 2002-07-19 2005-07-28 Bsh Bosch Und Siemens Hausgerate Gmbh Method for fixing the drum of a washing machine and fitting for the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2432465B2 (de) * 1974-07-06 1977-05-12 Gebrüder Thielmann AG, 6341 Sechshelden Horizontal gelagerte trommel fuer eine trommelwaschmaschine
DE3927166A1 (de) * 1989-08-17 1991-02-21 Bosch Siemens Hausgeraete Trommelwaschmaschine
EP1528136B1 (de) * 2003-10-29 2010-12-29 Miele & Cie. KG Waschaggregat für eine Waschmaschine mit einem Laugenbehälter aus Kunststoff

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6510716B1 (en) * 1999-10-19 2003-01-28 Lg Electronics Inc. Structure of driving unit in drum type washing machine
US20030131637A1 (en) * 2002-01-17 2003-07-17 Hee-Tae Lim Inner tub for washing machine
US20050103060A1 (en) * 2002-05-17 2005-05-19 Ozturk Umud E. Drum
US20050160772A1 (en) * 2002-07-19 2005-07-28 Bsh Bosch Und Siemens Hausgerate Gmbh Method for fixing the drum of a washing machine and fitting for the same

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090211311A1 (en) * 2007-06-29 2009-08-27 Mcmaster William J Basket assembly for a washing machine
US8650918B2 (en) * 2007-06-29 2014-02-18 Basf Se Basket assembly for a washing machine
US20100058816A1 (en) * 2008-09-09 2010-03-11 Samsung Electronics Co., Ltd. Drum type washing machine
US9284676B2 (en) * 2008-09-09 2016-03-15 Samsung Electronics Co., Ltd. Drum type washing machine
US20180163334A1 (en) * 2016-02-25 2018-06-14 Tcl Home Appliances (Hefei) Co., Ltd. Washing machine inner cylinder assembly and drum-type washing machine
US10883217B2 (en) * 2016-02-25 2021-01-05 Tcl Home Appliances (Hefei) Co., Ltd. Washing machine inner cylinder assembly and drum-type washing machine
WO2018048314A1 (en) * 2016-09-08 2018-03-15 Fisher & Paykel Appliances Limited Appliance direct-drive motor mounting arrangement
CN109790675A (zh) * 2016-09-08 2019-05-21 菲舍尔和佩克尔应用有限公司 电器直接驱动电机安装装置
US10487435B2 (en) 2017-03-23 2019-11-26 Midea Group Co., Ltd. Tub for a laundry washing machine
US10975513B2 (en) 2017-03-23 2021-04-13 Midea Group Co., Ltd. Tub with bearing housing insert for a laundry washing machine
WO2022124807A1 (ko) * 2020-12-09 2022-06-16 삼성전자주식회사 세탁기
US11859334B2 (en) 2020-12-09 2024-01-02 Samsung Electronics Co., Ltd. Washing machine

Also Published As

Publication number Publication date
KR20070057227A (ko) 2007-06-04
EA009991B1 (ru) 2008-06-30
DE102004047996A1 (de) 2006-04-06
WO2006037764A1 (de) 2006-04-13
CN101057020A (zh) 2007-10-17
EP1797233A1 (de) 2007-06-20
EA200700483A1 (ru) 2007-10-26

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AS Assignment

Owner name: BSH BOSCH UND SIEMENS HAUSGERATE GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RATFISCH, UWE;REEL/FRAME:019242/0286

Effective date: 20070305

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION