US3889496A - Pulley drive for a side-loaded drum type washing machine - Google Patents

Pulley drive for a side-loaded drum type washing machine Download PDF

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Publication number
US3889496A
US3889496A US448300A US44830074A US3889496A US 3889496 A US3889496 A US 3889496A US 448300 A US448300 A US 448300A US 44830074 A US44830074 A US 44830074A US 3889496 A US3889496 A US 3889496A
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United States
Prior art keywords
pulley
drum
stopping
drive
pulley part
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Expired - Lifetime
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US448300A
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English (en)
Inventor
Anton Heyne
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SEG Hausgeraete GmbH
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Siemens Elektrogaerate GmbH
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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
    • D06F37/30—Driving arrangements 
    • D06F37/302—Automatic drum positioning

Definitions

  • an improved pulley drive comprising a first annular pulley part fixed to a shaft on which the machine drum is mounted for coupling a drive arrangement thereto; an annular rim, mounted on the first pulley part in concentric disposition with respect thereto, which includes a plurality of lug members extending radially outwardly from the periphery thereof; and a second pulley part which includes a ring-shaped body portion having a radially inner edge adapted for slidable disposal over the annular rim.
  • the second pulley part includes a plurality of radially outwardly extending lug members, including at least one which is greater in axial lengths than the others and a plurality of circumferentially spaced apart recesses disposed in the body portion along the inner edge which receive the lug members on the rim.
  • Tension springs are coupled to the pulley parts for absorbing the rotational momentum of the drum during stopping and for aligning the housing and drum loading openings subsequent thereto.
  • German Design Pat. No. 6,603,447 discloses another drum type washing machine in which a braking system is utilized to slowly coast the machine drum into its aligned position. This system, however, is also expensive.
  • Other drum type machines are also known which the drum is slowed, prior to stopping, to a speed which is substantially lower than that of the drum during the wash cycle. Sudden stopping of the drum in its aligned position is thus possible due to the significant reduction of drum momentum effected.
  • the provision of a drive mechanism, however, with this additional speed control, is also unduly costly.
  • an improved pulley drive for such a machine which comprises a first annular pulley part fixed to a shaft on which the drum is mounted for coupling a pulley drive arrangement thereto; an annular rim mounted on the first pulley part in concentric disposition with respect thereto, which rim includes a plurality of lug members extending radially outwardly from the periphery thereof; and a second pulley part including a ring-shaped body portion which has a radially inner edge adapted for slidable disposal over the rim.
  • a plurality of radially outwardly extending lug members, including at least one stopping lug member of greater axial length than the other lug members, are disposed about the body portion.
  • the latter also includes a plurality of circumferentially spaced apart recesses disposed along the radially inner edge which receive the lug members of the annular rim.
  • Resilient tension means which may comprise a plurality of tension springs, are coupled to the first and second pulley parts, for absorbing the rotational momentum of the drum during stopping and for aligning the drum and machine housing loading openings subsequent to the stopping of V the drum.
  • FIG. 1 is a schematic side view illustration of a typical side-loaded drum type washing machine
  • FIG. 2 is a plan view of an improved pulley drive constructed according to the invention illustrated in conjunction with the drum stopping means of the machine;
  • FIG. 3 is a plan view of the first pulley part of the pulley drive of the invention.
  • FIG. 4 is a plan view of the second pulley part of the pulley drive of the invention.
  • FIG. 1 there is shown a typical side-loaded drum type washing machine which includes a housing 10, a washing liquid container 13 disposed therein, and a washing drum 11 which is fixed to a rotatable shaft 12.
  • Apulley belt drive arrangement consisting of a drum drive p'ul ley 20 fixed to the end of shaft 12, and a motor drive pulley l5 fixed to the" shaft of a drive motor 14 mounted in housing 10,. rotates the washing drum within container 13.
  • Both the drum 11 and the housing are provided with loading openings (not shown) for loading and unloading laundry.
  • Means for stopping the drum with the loading opening therein aligned with respect to the loading opening of the housing is also provided and will be described in detail later on herein.
  • the inventive pulley drive comprises a first annular pulley part (illustrated in FIG. 3) generally designated which is fixed to the drum shaft 12 and couples the pulley drive arrangement thereto.
  • Pulley part 30 comprises an annular hub portion 33 from which a plurality of spoke members 32 extend radially outwardly, and an annular peripheral portion 31 provided with a circumferential groove for receiving a drive belt.
  • the spoke members each include at least one circular aperture 37 disposed therein at the radially outer ends thereof.
  • An annular rim 34 is mounted on the hub portion 33 of pulley part 30 in concentric disposition with respect thereto, and includes a plurality of circumferentially spaced apart lug members which extend radially outwardly from the periphery thereof. The function of rim 34 and lug members 35 will be described after the following description of the second pulley part of the invention.
  • FIG. 4 illustrates the second pulley part of the pulley drive.
  • This part comprises a ring-shaped body portion, generally designated 40, from which a plurality of lug members 42 extend radially outwardly.
  • At least one of these lug members, illustrated as member 49 has an axial length which is greater than that of the other lug members, and each includes a circular aperture 47 disposed, except for member 49, at the radially outer end thereof.
  • the aperture in member 49 is instead disposed at approximately the same radial position with respect to body portion as the other apertures.
  • Ring-shaped portion 40 also includes a radially inner edge 50 and circumferentially spaced apart recesses disposed therealong which is adapted for slidable disposal over rim 34 on first pulley part 30.
  • a cylindrical pin 51 is affixed to the radially outer end of lug member 49 for operational engagement with the drum stopping means of the machine, which is described later on herein.
  • FIG. 2 illustrates the assembled pulley drive which assembly is effected simply by slidably disposing second pulley part 40 over rim 34 on first pulley part 30 so that lug members 35 are received by recesses 45.
  • the second pulley part is thus movable relative to the first pulley part, but is limited in its rotational movement by the peripheral length of recesses 45.
  • Resilient tension means illustrated as a plurality of tension springs 28 coupled to respective adjacent spoke and lug members of the pulley parts by means of the apertures 37 and 47 provided therein, absorb the rotational momentum of the machine drum during stopping thereof and subsequently align the loading openings of the drum and machine openings.
  • the drum stopping means includes a drop latch 19 pivotably mounted on the machine housing adjacent the drum pulley drive about an axis 52 so as to be movable between extended and retracted positions.
  • the drop latch is illustrated in the drawing in its extended position, and may be controlled by, for example, either a Bowden wire or an electromagnet.
  • a recess 53 is'provided in the drop latch for receiving pin 51 on lug member 49 when the latch is disposed in its extended position.
  • latch 19 is coupled to a solenoid 54 by a tension spring 55, and is resiliently held in its extended position by a bias spring 56 disposed about axis 52.
  • the latch also-carries switch means, illustrated as end switch 50, coupled to the drive motor circuit of the machine, for deenergizing the drive motor in response to engagement with lug member 49.
  • switch means illustrated as end switch 50
  • lug member 49 extends radially outwardly past the periphery of first pulley part 30 to facilitate engagement with the drop latch and switch.
  • the drive motor drives pulley parts 30 and 40, shaft 12, and drum 11 sequentially in alternate directions during the washing cycle.
  • the drum stopping circuit is designed to effect termination of the wash cycle during only one of those alternate directions of rotation, which is illustrated in FIG. 2 by arrow 21.
  • the drop latch 19 is positioned in its extended position by the drum stopping circuit.
  • pin 51 thereon engages the latch and lifts it upwardly until it reaches recess 53, whereupon the pin snaps into the recess and restrains pulley part 40 from further rotational movement.
  • the radially outer end of member 49 engages switch 50 and deenergizes the motor circuit.
  • first pulley part 30 continues to rotate with the drum and shaft 12.
  • Tension springs 28 absorb this additional rotational momentum and gradually bring the drum to a stop.
  • the amount of rotation of the pulley part 30 after pin 51 is detented in recess 53 is limited by the length of recesses 45 in which lug members 35 move. A length which permits between about 20 and 70 of rotation is preferable.
  • the expanded tension springs retract and rotate first pulley part 30 and the drum backwardly until the lug members 35 abut the end of recesses 45 and are thereby restrained from further movement.
  • the drum is fixed to shaft 12 so that when the pulley parts are in this relative position the housing and loading openings are aligned. Automatic alginment of the loading open- 4 ings is thereby achieved.
  • an improved pulley drive comprising:
  • annular rim mounted on said first pulley part in concentric disposition with respect thereto, and including a plurality of lug members extending radially outwardly from the periphery thereof;
  • a second pulley part including a ring-shaped body portion having a radially inner edge adapted for slidable disposal over said rim, and'a plurality of radially outwardly extending lug members, including at least one stopping lug member of greater axial length than the others of said lug members, said radially inner edge including a plurality of circumferentially spaced apart recesses disposed in said body portion for receiving said annular rim lug members;
  • resilient tension means coupled to said first and second pulley parts, for absorbing the rotational momentum of the drum during stopping and for aligning said drum and machine housing loading openings subsequent to the stopping of said drum.
  • said first pulley part comprises an annular hub portion on which said annular rim is mounted, a plurality of spoke members extending radially outwardly therefrom, and an annular peripheral portion including a circumferential groove disposed therein for receiving a drive belt.
  • said resilient tension means comprises a plurality of tension springs coupled to respective adjacent spoke and lug members of said first and second pulley parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
US448300A 1973-03-08 1974-03-05 Pulley drive for a side-loaded drum type washing machine Expired - Lifetime US3889496A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2311956A DE2311956A1 (de) 1973-03-08 1973-03-08 Vorrichtung zur erzielung des trommelstillstandes einer mantelbeschickbaren trommelwaschmaschine in der bedienungslage

Publications (1)

Publication Number Publication Date
US3889496A true US3889496A (en) 1975-06-17

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ID=5874385

Family Applications (1)

Application Number Title Priority Date Filing Date
US448300A Expired - Lifetime US3889496A (en) 1973-03-08 1974-03-05 Pulley drive for a side-loaded drum type washing machine

Country Status (5)

Country Link
US (1) US3889496A (enrdf_load_stackoverflow)
DE (1) DE2311956A1 (enrdf_load_stackoverflow)
ES (1) ES424049A1 (enrdf_load_stackoverflow)
FR (1) FR2220612B3 (enrdf_load_stackoverflow)
IT (1) IT1003695B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2052425A2 (es) * 1991-03-20 1994-07-01 Bosch Siemens Hausgeraete Lavadora de carga frontal.
US5398528A (en) * 1994-05-02 1995-03-21 Whirlpool Corporation Pulley system for automatic washer
US5448900A (en) * 1994-05-02 1995-09-12 Whirlpool Corporation System for automatically opening basket doors of a top loading horizontal axis automatic washer
US5469593A (en) * 1994-05-02 1995-11-28 Whirlpool Corporation Basket positioning system for a top loading horizontal axis automatic washer
US5678430A (en) * 1994-05-02 1997-10-21 Whirlpool Corporation Tub door system for a top loading horizontal axis automatic washer
US5902202A (en) * 1996-12-16 1999-05-11 Maytag Corporation Belt tensioning system
US6360392B1 (en) * 1997-12-24 2002-03-26 Alliance Laundry Systems Lll Liquified gas dry-cleaning machine with improved agitation system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3728940C2 (de) * 1987-08-29 1998-10-01 Miele & Cie Mantelbeschickbarer Waschtrockner
DE4132863A1 (de) * 1991-10-02 1993-04-08 Bosch Siemens Hausgeraete Einrichtung zum festhalten einer mantelbeschickbaren waeschetrommel in der beladestellung
FR2685360B1 (fr) * 1991-12-20 1995-05-05 Sextant Avionique Dispositif d'arret de tambour.
FR2692604B1 (fr) * 1992-06-18 1994-10-14 Sextant Avionique Dispositif d'arrêt de tambour de machine à laver.
FR2699563B1 (fr) * 1992-12-22 1995-01-20 App Menagers Ind Dispositif d'arrêt en position du tambour et de déverrouillage rapide de la porte d'accès d'une machine à tambour horizontal.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553791A (en) * 1945-11-19 1951-05-22 Paul A Smith Pulley

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553791A (en) * 1945-11-19 1951-05-22 Paul A Smith Pulley

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2052425A2 (es) * 1991-03-20 1994-07-01 Bosch Siemens Hausgeraete Lavadora de carga frontal.
US5398528A (en) * 1994-05-02 1995-03-21 Whirlpool Corporation Pulley system for automatic washer
US5448900A (en) * 1994-05-02 1995-09-12 Whirlpool Corporation System for automatically opening basket doors of a top loading horizontal axis automatic washer
US5469593A (en) * 1994-05-02 1995-11-28 Whirlpool Corporation Basket positioning system for a top loading horizontal axis automatic washer
US5678430A (en) * 1994-05-02 1997-10-21 Whirlpool Corporation Tub door system for a top loading horizontal axis automatic washer
US5902202A (en) * 1996-12-16 1999-05-11 Maytag Corporation Belt tensioning system
US6360392B1 (en) * 1997-12-24 2002-03-26 Alliance Laundry Systems Lll Liquified gas dry-cleaning machine with improved agitation system

Also Published As

Publication number Publication date
FR2220612B3 (enrdf_load_stackoverflow) 1976-10-15
DE2311956A1 (de) 1974-09-12
ES424049A1 (es) 1976-05-01
FR2220612A1 (enrdf_load_stackoverflow) 1974-10-04
IT1003695B (it) 1976-06-10

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