EP3601660B1 - Two-positioning blocking device of a washing drum - Google Patents

Two-positioning blocking device of a washing drum Download PDF

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Publication number
EP3601660B1
EP3601660B1 EP18739450.7A EP18739450A EP3601660B1 EP 3601660 B1 EP3601660 B1 EP 3601660B1 EP 18739450 A EP18739450 A EP 18739450A EP 3601660 B1 EP3601660 B1 EP 3601660B1
Authority
EP
European Patent Office
Prior art keywords
blocking
positioning
washing drum
micro
spring
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.)
Active
Application number
EP18739450.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3601660A1 (en
Inventor
Tomas LECO
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.)
Alliance Laundry Ce SRO
Original Assignee
Alliance Laundry Ce SRO
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 Alliance Laundry Ce SRO filed Critical Alliance Laundry Ce SRO
Priority to SI201831183T priority Critical patent/SI3601660T1/sl
Publication of EP3601660A1 publication Critical patent/EP3601660A1/en
Application granted granted Critical
Publication of EP3601660B1 publication Critical patent/EP3601660B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/302—Automatic drum positioning
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/20—Parameters relating to constructional components, e.g. door sensors
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/24—Spin speed; Drum movements
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting

Definitions

  • the invention concerns the automatic positioning device of washing drums, intended to secure blocking of rotation of a washing drum in a starting, predetermined position, where after it is blocked spontaneous rotation of the drum is denied.
  • Another group of the blocking systems contains a mechanism, which requires manual impact, in the other words, which are not automatic.
  • the systems are operated by a lever arranged in an area of a door of a washing machine. Disadvantage of the solution is, that the washing drum has to be turned to the blocking position manually.
  • EP 2 812 476 A1 an automatic device is presented, where two sensors intended for monitoring a position of a washing drum are used, and which comprises a blocking element with cut-out sections.
  • the device uses tooth like protrusions with cut-out sections.
  • the solution is demanding on a control system, because parallel signals dispatched from the two sensors have to be watched in real time. Furthermore, defining of a superposition of a washing drum is difficult.
  • the device is expensive because the sensors are expensive, as well as milling or machining of the blocking mechanism.
  • the document doesn't deal with an idea of interconnection of a positioning system with other systems of a washing machine, which is an important aspect for function of the device in view of its correct functionality.
  • DE 100 03 474 A1 presents a top-loading washing machine drum locating and stopping procedure and mechanism using locating peg deployed and engaged with notches in drum. Disadvantage of the blocking system is, that a control system has no information, that the washing machine is blocked, and about a position of the blocking element.
  • the aim of the present invention is to present a device, which removes above mentioned disadvantages of the state of the art.
  • FIG. 1 presents the blocking mechanism of the automatic positioning device according to the invention
  • Fig. 2 presents the automatic positioning device according to the invention without the belt pulley
  • Fig. 3 presents the view of a rear side of the blocking mechanism of the automatic positioning device according to the invention
  • Fig. 4 presents a detailed cross section of the blocking mechanism according to the Fig. 3 along the axis X, where connection of the blocking element with the scroll bar is depicted.
  • the positioning device of a washing drum according to the invention presented in Fig. 1 and 2 , comprises:
  • the sensor 1 of a position of a washing drum is arranged in a such place, where it is easy to set its position with regards to the blocking disk 2, in the other words, where ease of maintenance is ensured.
  • the blocking element 4 is made of plastic.
  • the blocking disk 2 is integrated into a pulley 3 casting.
  • the control system of a washing machine evaluates up warding and down warding edges of a digital signal from the sensor 1 of a position of a washing drum by the positioning strip 16 arranged on the blocking disk 2.
  • the positioning device uses micro-switches 12, 14 arranged in such place, where they are able to inform the control system by its signal about an actual position of the blocking element 4.
  • the positioning device comprises an electromotor 8, which turns a moving screw 9, which moves with a positioning nut 10, which is inserted into a hexagonal opening in the scroll bar 6.
  • the hexagonal opening prevents spinning of the positioning nut 10 to ensure only sliding movement of the positioning nut 10 along direction of the axis X of the moving screw 9.
  • the positioning nut 10 excites even into an inner opening of a spring 7 to provide a proper position of the spring 7.
  • An opposite end of the spring 7 is placed in a resting base 11, to which the spring 7 is resting.
  • the electromotor 8 is connected to the driving control unit, which prevents activation of the electromotor 8 as long as rotational speed of a washing drum differs from the predetermined one.
  • the scroll bar 6 with the fixed blocking element 4 is controlled by at least one spring 7 and by the positioning nut 10, which is shifting on the moving screw 9 arranged on a shaft of the electromotor 8.
  • the positioning strip 16 is arranged on the blocking disk 2 in such way, that it is able to generate an up warding or a down warding edge of the digital signal of the sensor 1 of position of a washing drum.
  • control system receives a signal from the sensor 1 of position of a washing drum about the up warding edge, the electromotor 8 is activated and the positioning nut 10 is starting to move in the direction D2.
  • the electromotor 8 is activated for a precisely defined period. After that the electromotor 8 is deactivated by the control system of a washing machine.
  • the scroll bar 6 is pushed by the spring 7 and moved with the positioning nut 10 towards the blocking disk 2. After that, the blocking element 4 gets contact with the blocking disk 2.
  • the mutual touch is achieved in a sufficient distance before the cut-out section arranged in the blocking disk 2a or 2b, to ensure enough time for the positioning nut 10 to get a position, where it can't limit movement of the scroll bar 6 directed towards the termination position, to ensure optimal blocking of the blocking disk 2 by inserting of the blocking element 4 into the cut-out section 2a or 2b. Inserting speed of the blocking element into the cut-out section 2a or 2b depends only on force of the pushing spring, whereas friction resistance is almost negligible.
  • the blocking element 4 is in touch with the blocking disk 2 and slides into a position, where it is inserted in the cut-out section 2a or 2b of the blocking disk 2 by impact of force of the spring 7.
  • the micro-switches 14 and 15 are switched on during inserting of the blocking element into the cut-out section 2a or 2b.
  • the first micro-switch 14 is switched on after minimal insert of the blocking element 4 is performed.
  • the first micro-switch 14 is connected directly to the control unit of a driver of a washing drum, which immediately performs interruption of the driver of the washing drum.
  • the second micro-switch 15 is switched on after sufficient entry of the blocking element 4 into the cut-out section 2a or 2b is performed.
  • the second micro-switch 15 informs the control system of a washing machine about blocking of the washing drum of a washing machine. After that the blocking process is accomplished.
  • the positioning nut 10 If the positioning nut 10 is moving in the direction D1 the positioning nut 10 leans on the scroll bar 6, so it is shifted in the direction D1. In the same time the spring 7 is pushed down.
  • the movement of the scroll bar 6 is limited by termination barriers and also by third micro-sensor 12, which disconnects source of electronic power from the electromotor 8, when the predetermined position of the scroll bar 6 is reached.
  • the third micro-switch 12 is mechanically connected to the fourth micro-switch 13, which when switched signalizes to the control system that the blocking element 4 is positioned in an unlocked position. In this position the blocking disk 2 is able to rotate freely with the shaft and with the washing drum.
  • the positioning nut 10 During reversal movement of the positioning nut 10 in the direction D2 the scroll bar 6 is shifted towards the blocking disk 2 by force of the spring 7.
  • the positioning nut 10 don't need any stopper in the direction D2.
  • the positioning nut 10 is shifted in the direction D2 in a limited time.
  • the time limit is constant and adjustable by the control system of the washing machine.
  • the positioning nut 10 is shifting in the direction D2 for a predetermined time, so it stops always at the same place.
  • the time limit is long enough to accept loss of speed of the positioning nut 10 caused by mechanical friction or delay of response of the driving system.
  • the positioning screw 9 is long enough to elongate the time interval of movement of the positioning nut 10.
  • the time limit is elongated to ensure shift of the positioning nut 10 in to the right position on the positioning screw 9, where it doesn't prevent moving of the scroll bar 6 to a blocked position in the direction D2.
  • Blockage of the blocking disk 2 is a complex process, which uses more systems at one time.
  • First of all the control software of a washing machine finds out the actual position of the blocking element 4 by the micro-switch 13 or 15. If all is correctly done the control software sets up a speed of rotation of the washing drum via the actuator drive unit of the washing drum. After that the control unit of a washing machine is waiting for a right moment for activation of the electromotor 8. The right moment is discovered by the sensor 1 of a washing drum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP18739450.7A 2017-05-26 2018-05-28 Two-positioning blocking device of a washing drum Active EP3601660B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201831183T SI3601660T1 (sl) 2017-05-26 2018-05-28 Priprava za blokiranje pralnega bobna v dveh položajih

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2017-301A CZ2017301A3 (cs) 2017-05-26 2017-05-26 Automatické polohovací zařízení pracích bubnů
PCT/CZ2018/050025 WO2018215004A1 (en) 2017-05-26 2018-05-28 Two-positioning blocking device of a washing drums

Publications (2)

Publication Number Publication Date
EP3601660A1 EP3601660A1 (en) 2020-02-05
EP3601660B1 true EP3601660B1 (en) 2024-10-09

Family

ID=62873107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18739450.7A Active EP3601660B1 (en) 2017-05-26 2018-05-28 Two-positioning blocking device of a washing drum

Country Status (8)

Country Link
US (1) US20210123178A1 (cs)
EP (1) EP3601660B1 (cs)
CN (1) CN111032946B (cs)
CZ (1) CZ2017301A3 (cs)
DK (1) DK3601660T3 (cs)
ES (1) ES2994450T3 (cs)
SI (1) SI3601660T1 (cs)
WO (1) WO2018215004A1 (cs)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763219A (en) * 1986-11-14 1988-08-09 Tsubakimoto Chain Co. Overload protection for DC motor-driven linear actuator
IT1218255B (it) * 1988-06-17 1990-04-12 Smeg Spa Dispositivo di bloccaggio automatico in una posizione prefissata del cestello di lavaggio di macchine lavabiancheria
JP2834855B2 (ja) * 1990-06-26 1998-12-14 三洋電機株式会社 ドラム式洗濯機
US5469593A (en) * 1994-05-02 1995-11-28 Whirlpool Corporation Basket positioning system for a top loading horizontal axis automatic washer
FR2788791B1 (fr) * 1999-01-27 2001-04-13 Electrolux Syst Blanchisserie Procede d'indexage en pratique d'un tambour de lave-linge et lave-linge mettant en oeuvre ce procede
JP3609789B2 (ja) * 2002-03-06 2005-01-12 三洋電機株式会社 ドラム式洗濯機
ITTO20040691A1 (it) * 2004-10-08 2005-01-08 Elbi Int Spa Dispositivo di bloccaggio per un elemento mobile, in particolare per un cestello portabiancheria di una macchina lavatrice a carica dall'alto
SI2812476T1 (sl) 2012-02-09 2021-08-31 Electrolux Laundry Systems France Snc Blokirna naprava, ki obsega premični element, zlasti pralnega stroja, in z njo povezan postopek
CN106480647B (zh) * 2015-08-31 2019-11-12 青岛海尔洗衣机有限公司 一种内桶的锁止机构及洗衣机

Also Published As

Publication number Publication date
US20210123178A1 (en) 2021-04-29
EP3601660A1 (en) 2020-02-05
CN111032946B (zh) 2022-08-02
CZ2017301A3 (cs) 2018-12-05
DK3601660T3 (da) 2025-01-02
ES2994450T3 (en) 2025-01-24
SI3601660T1 (sl) 2025-03-31
WO2018215004A1 (en) 2018-11-29
CN111032946A (zh) 2020-04-17

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