EP0709515A1 - Dispositif d'entraînement pour sèche-linge domestique - Google Patents

Dispositif d'entraînement pour sèche-linge domestique Download PDF

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Publication number
EP0709515A1
EP0709515A1 EP95112317A EP95112317A EP0709515A1 EP 0709515 A1 EP0709515 A1 EP 0709515A1 EP 95112317 A EP95112317 A EP 95112317A EP 95112317 A EP95112317 A EP 95112317A EP 0709515 A1 EP0709515 A1 EP 0709515A1
Authority
EP
European Patent Office
Prior art keywords
lever
axis
drive device
spring
countershaft
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
Application number
EP95112317A
Other languages
German (de)
English (en)
Other versions
EP0709515B1 (fr
Inventor
Dieter Knopp
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
Bosch Siemens Hausgerate 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 Bosch Siemens Hausgerate GmbH filed Critical Bosch Siemens Hausgerate GmbH
Publication of EP0709515A1 publication Critical patent/EP0709515A1/fr
Application granted granted Critical
Publication of EP0709515B1 publication Critical patent/EP0709515B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • D06F58/08—Driving arrangements

Definitions

  • the invention relates to a drive device for a household tumble dryer with an at least approximately horizontally rotatably mounted laundry drum, which can be driven in one direction or reversibly by a countershaft sprocket by means of a drive belt wrapped around its drum jacket, which is connected in a rotationally fixed manner to a large pulley and is mounted on a common axis and in turn is driven by the motor pinion of an electric drive motor via a countershaft belt.
  • Such a drive device is known from US Pat. No. 3,382,587.
  • the distances between the axles of the motor pinion and the countershaft as well as between this and the washing drum are fixed. Therefore, the countershaft belt and the drum drive belt must be tensioned by means of an adjusting device during the assembly of the drive device; because the installation dimensions and the length dimensions of the belts are subject to tolerance. For the purpose of maintaining the belt tension required for the required power transmission, the tolerances must be adjusted be balanced.
  • the belts are subject to permanent elongation over a longer service life, which at fixed center distances reduces the belt tension and thus reduces the transmissible forces and ultimately destroys the belt.
  • tensioning rollers have already been used (DE-OS 22 07 372), which are loaded by means of one or more spring-loaded levers on the respective rear of the belt.
  • tensioning pulleys that are not too complicated already have an undesirable property: they lead to the drive pinion or tensioning pulley running onto the incoming belt drum and thereby reduce the transferable forces.
  • the invention has for its object to avoid the above disadvantages in a drive device defined at the outset and to provide an adjustment-free construction which does not have to be retightened without loss of the transferable forces even after a longer service life of the drive belt.
  • this object is achieved in that the common axis is guided in an axially parallel manner and is spring-loaded both in relation to the axis of the motor pinion and in relation to the drum axis in the sense of increasing the distance.
  • Such a design of the drive device automatically compensates for tolerances in the system, as well as additional length change tolerances for the belts in the advanced use of the clothes dryer out. In this case, an operation which is otherwise provided for during assembly can be omitted, as a result of which the center distances for the drive belts had to be particularly adjusted. Due to the insensitivity of the drive device according to the invention to long-term length change tolerances of the belts, the number of service calls that are otherwise necessary for retensioning the belts is also eliminated.
  • the common axis is located near the free end of a lever with one arm.
  • a single additional component is required in a development of the invention designed in such a way that the fulcrum for the large pulley and the countershaft sprocket is attached to a slide guided at least approximately in the direction of the axis of the motor pinion on the lever.
  • the slide has a chamber with a spring support for the compression spring, which is located at a distance from the fulcrum and whose fixed counterpart on the lever is close to an elongated hole in the guide of the slide for penetrating the lever with the countershaft.
  • the base 2 of a floor assembly is installed in the lower area of the housing 1 of a tumble dryer.
  • the drive motor 3 for the laundry drum 4 rests therein, which in turn is rotatably mounted on the axis 5 on a housing component (not shown) which is arranged at a distance from the base 2.
  • a lever 7 is also supported with one arm, in the operating position of which the axes of the fulcrum 6 and the drive motor 3 lie on a straight line 22 with the common axis 8 of the large pulley 9 and the countershaft sprocket 10.
  • the common axis 8 is arranged in the vicinity of the free end 11 of the single-arm lever 7.
  • the countershaft sprocket 10 is pulled into the drive belt 14 for the laundry drum 4 by this spring 12. As a result, the belt 14 remains under tension without any adjustment being required.
  • the drum cross-sectional circular area 15 represents the drum pulley which is wrapped by the belt 14 and which is automatically in the same plane as the countershaft sprocket 10.
  • the lever 7 is stretched by a compression spring 16 which is guided in a double-walled sleeve 17 so that the large pulley 9 has its lay belt 18 between them and the motor pinion 19 stretches.
  • the countershaft belt 18 remains constantly tensioned without adjustment.
  • the tension of the belts 14 and 18 is determined in part by the geometry of the countershaft parts and essentially by the tensioning forces of the springs 12 and 16.
  • the rotational forces required for transmission from the motor to the large pulley 9 and from the countershaft sprocket 10 to the casing of the drum 4 determine the tension required for the belts 18 and 14.
  • the tension for belt 18 is represented by vector F18 and the tension for belt 14 is represented by vector F14.
  • the spring force F12 is broken down into the vector F2, which is the corresponding normal force on the straight line 22 at the point of application 20 of the point of intersection of the imaginary axis of the spring 12 and the straight line 22, and the vector F19, which ultimately results from the existing triangle of forces at the angle can be calculated.
  • FIG. 3 shows another embodiment for a drive device according to the invention.
  • the one-armed lever 23 is not resiliently mounted at its pivot point 6; the lever 23 is rigid in itself. However, in the vicinity of its lever end 11 it has a link guide 24, which shows the central axis in the operating position of the lever 23 approximately on the axis of the motor 3.
  • the link guide 24 receives a carriage 25 on which the bearing for the large pulley 9 and for the countershaft sprocket 10 is fastened. With this slide 25, the countershaft bearing can therefore be moved back and forth in the direction of the central axis of the link guide 24.
  • the carriage 25 has at its end 26 protruding from the lever 23 a counter bearing bridge 27 for a compression spring 28 which is supported on a bearing plate 29 of the lever 23.
  • the compression spring 28 therefore pulls the large pulley 9 over the countershaft bearing and the slide 25 into the belt 18.
  • the countershaft sprocket 10 is pulled into the belt 14 by the tension spring 12 at the end 11 of the lever 23.
  • FIG. 3 illustrated embodiment other spring tensions.
  • the basic structure of the drive device according to the invention and the calculation process for the spring forces are, however, of the same type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP95112317A 1994-10-27 1995-08-04 Dispositif d'entraínement pour sèche-linge domestique Expired - Lifetime EP0709515B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4438425A DE4438425B4 (de) 1994-10-27 1994-10-27 Antriebseinrichtung für einen Haushalt-Wäschetrockner
DE4438425 1994-10-27

Publications (2)

Publication Number Publication Date
EP0709515A1 true EP0709515A1 (fr) 1996-05-01
EP0709515B1 EP0709515B1 (fr) 2001-05-23

Family

ID=6531860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95112317A Expired - Lifetime EP0709515B1 (fr) 1994-10-27 1995-08-04 Dispositif d'entraínement pour sèche-linge domestique

Country Status (3)

Country Link
US (1) US5694795A (fr)
EP (1) EP0709515B1 (fr)
DE (2) DE4438425B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903433A3 (fr) * 1997-09-18 1999-07-21 CANDY S.p.A. Transmission à courroie , en particulier pour sèche linge et machines à laver
WO2001020071A1 (fr) * 1999-09-15 2001-03-22 Senkingwerk Gmbh Systeme d'entrainement de tambour
DE102006061526A1 (de) 2006-12-27 2008-07-03 BSH Bosch und Siemens Hausgeräte GmbH Antriebseinheit für einen Haushalt-Wäschetrockner

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1289377B1 (it) * 1996-05-22 1998-10-02 Electrolux Zanussi Elettrodome Dispositivo per il montaggio del motore in una macchina lavabiancheria
DE19728068B4 (de) * 1997-07-01 2006-08-17 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrockner
US5976043A (en) * 1997-08-18 1999-11-02 Hise; Neil R. Apparatus for increasing wear life of machine members
US7168274B2 (en) * 2003-05-05 2007-01-30 American Dryer Corporation Combination washer/dryer having common heat source
US7204774B2 (en) * 2004-05-17 2007-04-17 Emerson Electric Co. One-piece drive pulley and belt guide
CN110594373B (zh) * 2019-08-13 2024-02-13 上海海尔洗涤电器有限公司 一种皮带张紧机构、干衣机及干衣机的皮带的张紧方法
KR102841287B1 (ko) * 2020-06-22 2025-08-04 엘지전자 주식회사 의류처리장치

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506516A (en) 1945-09-19 1950-05-02 Hamilton Mfg Co Laundry drier
US2716820A (en) 1952-11-26 1955-09-06 Temco Inc Drying apparatus
US2814886A (en) * 1954-12-27 1957-12-03 Paul L Fowler Clothes dryer
US3066422A (en) * 1959-01-07 1962-12-04 Blackstone Corp Clothes driers
US3382587A (en) 1966-09-06 1968-05-14 Mc Graw Edison Co Clothes conditioning-drying machine
DE2207372A1 (de) 1972-02-17 1973-08-23 Miele & Cie Waeschetrockner mit umlaufender waeschetrommel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2994216A (en) * 1959-09-02 1961-08-01 Westinghouse Electric Corp Laundry apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506516A (en) 1945-09-19 1950-05-02 Hamilton Mfg Co Laundry drier
US2716820A (en) 1952-11-26 1955-09-06 Temco Inc Drying apparatus
US2814886A (en) * 1954-12-27 1957-12-03 Paul L Fowler Clothes dryer
US3066422A (en) * 1959-01-07 1962-12-04 Blackstone Corp Clothes driers
US3382587A (en) 1966-09-06 1968-05-14 Mc Graw Edison Co Clothes conditioning-drying machine
DE2207372A1 (de) 1972-02-17 1973-08-23 Miele & Cie Waeschetrockner mit umlaufender waeschetrommel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903433A3 (fr) * 1997-09-18 1999-07-21 CANDY S.p.A. Transmission à courroie , en particulier pour sèche linge et machines à laver
WO2001020071A1 (fr) * 1999-09-15 2001-03-22 Senkingwerk Gmbh Systeme d'entrainement de tambour
DE102006061526A1 (de) 2006-12-27 2008-07-03 BSH Bosch und Siemens Hausgeräte GmbH Antriebseinheit für einen Haushalt-Wäschetrockner
WO2008080826A1 (fr) * 2006-12-27 2008-07-10 BSH Bosch und Siemens Hausgeräte GmbH Unité d'entraînement pour un sèche-linge à usage domestique

Also Published As

Publication number Publication date
DE4438425A1 (de) 1996-05-02
EP0709515B1 (fr) 2001-05-23
US5694795A (en) 1997-12-09
DE59509281D1 (de) 2001-06-28
DE4438425B4 (de) 2006-10-26

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