SI21967A

SI21967A - Electromotor drive for opening and closing the washing powder drawer of washing machines

Info

Publication number: SI21967A
Application number: SI200500037A
Authority: SI
Inventors: Joze VARDJAN; Robert Cadonic; Anton Stefanic
Original assignee: EKI proizvodnja elektromehanskih komponent, d.o.o., Crnomelj
Priority date: 2005-02-15
Filing date: 2005-02-15
Publication date: 2006-08-31

Abstract

The electromotor drive consists of an electromotor (1), a gear transmission (2), which fits the electromotor (1) gearwheel (3) and at the same time a cogged bar (4), which is aimed at clamping to the washing machine drawer, while all the specified elements are located within the enclosure (5). The drive also consists of at least one limit switch (8) and an electronic assembly (10). The gear transmission (2) is designed as non self-locking. On the cogged bar (4) there are two designed elements (6) applied representing the end markers for shifting the drawer across the central area, while the lever (9) of the limit switch (8) detects one element or the other (6). The electronic assembly (10) includes a terminal for an external pushbutton (11) for manual triggering of the closing or opening of the drawer and repeated closing of the open drawer after interruption and removal of any obstacle, an element (12) for measuring the overloading of the electromotor (1) and element (13) for determining the time interval during the electromotor (1) overload phase.

Description

Elektromotorni pogon za odpiranje in zapiranjeElectric motor for opening and closing

PREDALA ZA PRALNO SREDSTVO V PRALNEM STROJUWASHER WASHERS IN THE WASHER

Predmet izumaThe subject of the invention

Predmet izuma je elektromotorni pogon za odpiranje in zapiranje predala za pralno sredstvo v pralnem stroju.The subject of the invention is an electric motor drive for opening and closing the detergent drawer in the washing machine.

Tehnični problemA technical problem

Tehnični problem, ki ga rešuje izum, je zasnovati tak elektromotorni pogon za odpiranje in zapiranje predala za pralno sredstvo v pralnem stroju, zlasti gospodinjskem pralnem stroju, ki bo omogočal tudi neposredno ročno odpiranje oziroma zapiranje predala brez predhodnega posega uporabnika v pogon ali njegovo povezavo s predalom in tudi zagotavljal varnost pri strojnem zapiranju oziroma odpiranju tako glede uporabnika, da ne pride do priprtja prstov, če bi uporabnik iz poljubnega razloga posegel z roko v območje predala, kakor tudi glede elektromotornega pogona samega zaradi možne preobremenitve, če bi ovira, npr. prsti idr., preprečevala popolno odprtje oziroma zaprtje predala, pri čemer naj bo naprava enostavna in cenovno ugodna pri velikoserijski proizvodni.A technical problem solved by the invention is to design such an electromotor drive for opening and closing the detergent drawer in a washing machine, in particular a household washing machine, which will also allow direct manual opening or closing of the drawer without first interfering with the drive or its connection with drawers, and also provide security for machine closing or opening in such a way that the user does not close his fingers if the user for any reason reaches into the area of the drawer, as well as the electric motor itself due to possible overload, in case of obstruction, e.g. fingers, etc., to prevent the drawer from opening or closing completely, keeping the device simple and affordable for large-scale production.

31322. doc/XII-04/D-35-Vr31322. doc / XII-04 / D-35-Vr

Znano stanje tehnikeThe prior art

Prijavitelj ne pozna elektromotornega pogona za ta namen. Odsotnost takega pogona si je možno razlagati s tem, da bi izvedba na znan način, s čimer bi tak pogon vseboval vse zahteve, kot so navedene v gornjem tehničnem problemu, moral vključevati toliko sestavnih delov, da bo bila proizvodnja pogona predraga za prednostno vgradnjo v gospodinjske aparate.The applicant does not know the electric drive for this purpose. The absence of such an actuator can be interpreted as meaning that the implementation in a known manner, whereby such an actuator would meet all the requirements mentioned in the technical problem above, would have to include so many components that the production of the actuator would be too expensive to prioritize in household appliances.

Rešitev tehničnega problemaThe solution to a technical problem

Opisani tehnični problem je rešen z napravo po izumu, katere bistvena značilnost je v tem, da je elektromotorni pogon povezan z zobniškim prenosom, katerega zadnji zobnik ubira z zobato letvijo, ki je povezana s predalom za pralno sredstvo v pralnem stroju tako, da poteka vzporedno z vodili predala. Pri tem je nadaljnja značilnost naprave po izumu v tem, da vsebuje elektronski element za nadzor preobremenitve elektromotoga, ki se pojavi v obeh končnih legah predala (odprt in zaprt), ter v slučaju, da se med odpiranjem oziroma zapiranjem predala pojavi neka ovira. Elektronski element za nadzor preobremenitve je opremljen z časovnim programatogem, ki ob ugotovitvi električne preobremenitve elektromotoga ustavi delovanje elektromotoga po predvidenem času. Razen tega je elektromotorni pogon po izumu opremljen s končnima stikaloma, ki ustavita pomik letve in s tem posode pred končno lego (zaprto oziroma odprto) in preklopita na počasnejše delovanje zapiranja oziroma odpiranja ob povečani moči elektromotoga, pri čemer je reža predala pred končno lego, ko se zgodi navedeni preklop v upočasnitev zapiranja, tako majhna, da ni več možnosti, da bi vanjo pomotoma potisnili prste.The described technical problem is solved by the device according to the invention, the essential feature of which is that the electric motor drive is connected to a gear transmission, the rear gear of which is driven by a rack, which is connected to the detergent drawer in the washing machine so that it runs in parallel with drawer guides. A further feature of the device according to the invention is that it contains an electronic element for controlling the electromotog overload that occurs in both end positions of the drawer (open and closed), and in the event of an obstruction during the opening or closing of the drawer. The electronic element for overload control is equipped with a timing programmator which, upon detecting an electrical overload of the electromotog, stops the electromotog from operating after the scheduled time. In addition, the electric motor drive according to the invention is provided with end switches that stop the latch movement and thus the containers before the end position (closed or open) and switch to slower closing or opening operations with the increased power of the electric motor, with the slot being drained before the end position, when the aforementioned changeover slows down, it is so small that there is no chance of accidentally pushing it with your fingers.

Podrobneje bo bistvo izuma pojasnjeno v nadaljevanju z opisom izvedbenega primera in priložene risbe, na katerih kaže sl. 1 shematski prikaz elektromotornega pogona po izumu v stranskem pogledu.The essence of the invention will be explained in more detail below with a description of an embodiment and the accompanying drawings, in which FIG. 1 is a schematic side view of an electric motor drive according to the invention.

31322.doc/XII-04/D-35-Vr31322.doc / XII-04 / D-35-Vr

Elekrtomotomi pogon je izveden iz elektromotoija 1, zobniškega prenosa 2, ki ubira z zobnikom 3 elektromotoija 1 in hkrati z zobato letvijo 4, ki je vpeta v na sliki neprikazan predal pralnega stroja. Vsi ti elementi so nameščeni v ohišju 5.The electromotomy actuator is made of an electromoto 1, a gear 2, which engages the gear 3 of the electromoto 1 and at the same time with the gear 4, which is fixed in the not shown drawer of the washing machine. All these elements are housed in a housing 5.

Glede na tehnični problem, ki ga rešuje izum, je zobniški prenos 2 zasnovan tako, daje samonezaporen. S tem je omogočeno, da lahko odpiramo in zapiramo predal tudi ročno, brez možne poškodbe pogona kot takega, s čimer ni potreben dodaten element za izklop pogona pri ročnem manipuliranju predala.According to a technical problem solved by the invention, the gear train 2 is designed to be self-locking. This allows the drawer to be opened and closed manually, without possible damage to the actuator as such, thus requiring no additional element to shut off the actuator when manually manipulating the drawer.

Na zobati letvi 4 sta izvedena dva oblikovna elementa 6 kot mejni oznaki pomika predala v srednjem območju. Prednostno sta elementa 6 izvedena kot končni prečni steni žleba 7, ki je izveden osno vzporedno na eni ploskvi zobate letve 4. V tem primeru zadostuje samo eno končno stikalo 8, katerega vzvod 9 teče v žlebu 7 in tipa eno oziroma drugo končno lego žleba 7. Končni legi žleba 7 sta tako določeni, da se nahaja končno stikalo 8 v eni oziroma drugi končni legi žleba 7 takrat, ko se predal nahaja pred popolnoma zaprtim oziroma popolnoma odprtim položajem toliko, da v režo priprtega predala ni možno vstaviti npr. prstov.On the lath 4, two design elements 6 are made as boundary markers of the drawer movement in the middle region. Preferably, the elements 6 are made as the end transverse walls of the groove 7, which is axially parallel to one surface of the toothed rack 4. In this case, only one end switch 8 whose lever 9 runs in the groove 7 and type one or the other end position of the groove 7 is sufficient. The end positions of the groove 7 are so defined that the end switch 8 is located in one or the other end position of the groove 7 when the drawer is in a fully closed or fully open position so that it is not possible to insert, for example, a closed drawer. fingers.

Nadalje je sestavni del elektromotornega pogona po izumu elektronski sklop 10, ki vključuje priključek za zunanjo tipko 11, ki se nahaja poljubno nekje na pralnem stroju, prednostno na krmilni plošči skupaj z drugimi krmilnimi gumbi. Preko tipke 11 posreduje uporabnik sklopu 10 ukaz za začetek delovanja pogona za odpiranje oziroma zapiranje predala, prav tako pa deluje tipka 11 tudi kot iniciator ponovnega delovanja pogona po odstranitvi ovire, zaradi katere je bilo odpiranje oziroma zapiranje predala prekinjeno. Trenutni položaj končnega stikala 8 je tista informacija, ki določa vrtenje elektromotoija v smeri zapiranjaFurther, an integral assembly of the invention is an electronic assembly 10 comprising an external button connector 11 located arbitrarily somewhere on the washing machine, preferably on the control panel together with other control buttons. Through the key 11, the user sends to the assembly 10 a command to start the drive for opening or closing the drawer, as well as the button 11 also acts as an initiator for the re-operation of the drive after removing the obstacle that caused the opening or closing of the drawer. The current position of the limit switch 8 is that information that determines the rotation of the electromotion in the closing direction

31322.dOC/XII-04/D-35-Vr ali odpiranja predala, potem ko je uporabnik s pritiskom na tipko 11 ukazal zapreti oziroma odpreti predal.31322.dOC / XII-04 / D-35-Vr or drawer opening after the user has pressed the button 11 to close or open the drawer.

Nadalje sklop 10 vsebuje element za merjenje preobremenitve elektromotoija 1 in sicer meri tok, s spremembo katerega posredno sklepamo na oviro pri predalu, ki povzroča preobremenitev motoija. V sklopu 10 se nahaja tudi element 12 za določanje časovnega intervala preobremenitve elekromotoija 1, po katerem sklop 10 samodejno preusmeri delovanje elekromotoija 1 v nasprotno smer za časovni interval, ki ga prav tako opredeljuje element 12.Further, assembly 10 comprises an electromotive overload measuring element 1, namely measuring the current by modifying which indirectly infers a barrier at the drawer causing the motor overload. In assembly 10 there is also an element 12 for determining the time interval of overload of the electromoto 1, after which the assembly 10 automatically reverses the operation of the electromoto 1 in the opposite direction for the time interval, which is also defined by the element 12.

Elektromotorni pogon po izumu deluje tako, da po ročnem pritisku tipke 11 in samodejne določitve položaja predala s pomočjo končnega stikala 8, elektronski sklop 10 izbere smer vrtenja elektromotoija 1 in nanj dovede ustrezno napetost. Potem ko je končno stikalo 8 zaznalo enega od elementov 6 na zobati letvi 4, s čimer je določeno, da se predal nahaja v bližini zaprte, oziroma odprte lege, preklopi sklop 10 na počasnejšo hitrost zapiranja oziroma odpiranja. Ves čas delovanja elektromotorja pri zapiranju oziroma odpiranju predala je vključen v elektronskem sklopu 10 element 12 za merjenje preobremenitve elektromotorja 1. Ko pride predal v zaprto ali odprto končno lego, se pojavi v elektromotorju 1 preobremenitev, ki jo zazna v sklopu 10 element 12 za merjenje preobremenitve elektromotorja 1, ki po predvidenem časovnem intervalu, ki ga določa element 13 za določanje časovnega intervala v stanju preobremenitve elektromotorja 1, izklopi v električnem smislu elektromotor 1. Prednostno je predviden čas preobremenitve približno 300 ms. Nov ciklus delovanja (odpiranja oziroma zapiranja) je možen samo s ponovnim pritiskom na tipko 11.The electric motor drive of the invention operates by manually pressing the button 11 and automatically determining the position of the drawer by means of the limit switch 8, the electronic assembly 10 selects the direction of rotation of the electric motor 1 and supplies the corresponding voltage. After the end switch 8 detects one of the elements 6 on the toothed rack 4, which determines that the drawer is located close to the closed or open position, it switches the assembly 10 to a slower closing or opening speed. During the operation of the motor when closing or opening the drawer, it is included in the electronic circuit 10 of the element 12 for measuring the overload of the electric motor 1. When the drawer enters the closed or open end position, an overload is detected in the electric motor 1, which is detected by the element 10 in the measuring element 12 overload of electric motor 1, which switches off the electric motor 1. after an estimated time interval defined by element 13 for determining the time interval in overload condition of electric motor 1. Preferably, the overload time is about 300 ms. A new cycle of operation (opening or closing) is only possible by pressing the button 11 again.

V slučaju, da se pojavi pri odpiranju ali zapiranju predala ovira, ki zaustavi pomik predala, zazna element 12 za merjenje preobremenitve elektromotorja 1 njegovo preobremenitev. Če traja ta preobremenitev več kot nek časovni interval,In the event of an obstacle stopping the movement of the drawer when opening or closing the drawer, it detects an overload element of the electric motor 1 to measure its overload. If this overload takes more than a time interval,

31322.doc/XII-04/D-35-Vr ki ga sproti meri element 13 za določanje časovnega intervala v stanju preobremenitve elektromotoija 1, prednostno po 300 ms, potem sklop 10 zasuka smer vrtenja elektromotoija 1 za določen čas, ki ga določa element 13 za določanje časovnega intervala v stanju preobremenitve elektromotoija 1 in traja prednostno 50 ms. S tem se predal nekoliko povrne nazaj in sprosti oviro, npr. prste upravljalca, da jo izvlečemo iz reže v predalu brez poškodbe ovire in tudi predala oziroma elektromotornega pogona. Nadaljevanje odpiranja oziroma zapiranja predala z elektromotornim pogonom je možno samo s predhodnim ročnim pritiskom na tipko 11.31322.doc / XII-04 / D-35-Vr, which is continuously measured by the element 13 for determining the time interval in the overload state of the electromotion 1, preferably after 300 ms, then the assembly 10 rotates the direction of rotation of the electromoto 1 for a certain time determined by the element 13 for determining the time interval in the overload state of electromoto 1 and preferably 50 ms. This reverses the drawer slightly and releases the obstacle, e.g. the fingers of the operator to pull it out of the slot in the drawer without damaging the obstruction and also the drawer or the motor drive. It is only possible to continue opening or closing the electrically operated drawer by pressing the button 11 manually beforehand.

Zaradi zasnove celega elektromotornega pogona v smislu čim manjšega števila sestavnih delov, je zobata letev 4 drsno uležajena neposredno v izsekih 14 v ohišju 5.Due to the design of the entire electric motor drive in terms of as few components as possible, the toothed rack 4 is slidably mounted directly in the sections 14 in the housing 5.

Razume se, da lahko strokovnjak s tega področja zasnuje, na osnovi poznavanja gornjega opisa izuma tudi drugačne izvedbe tonamenskega elektromotornega pogona, ne da bi obšel značilnosti izuma, kot so opredeljene v sledečih patentnih zahtevkih.It is understood that one of skill in the art may design, based on the knowledge of the above description of the invention, a different embodiment of the tonal electric motor drive without circumventing the features of the invention as defined in the following claims.

Claims

An electromotomy actuator derived from an electromotor (1), a gear train (2), which engages with the gear (3) of the electric motor (1) and at the same time with a rack (4) intended to be secured to the drawer of the washing machine, wherein said elements are housed in the housing (5) of at least one limit switch (8) and electronic assembly (10), characterized in that the gearing (2) is designed as self-closing and that the gears (4) are made two design elements (6) as boundary marks of the drawer displacement in the middle region, the end switch (8) having a lever (9) running in a groove (7) of type one or the other end position of the groove (7), comprising electronic assembly (10) connector for external pushbutton (11) for manually triggering the drawer closing or opening and re - closing the drawer opening after interruption and removal of the obstacle, an electromotive overload change element (1) and an element (13) for. determining the time interval in the overload condition of the electromoto (1).

Electric motor drive according to claim 1, characterized in that the elements (6) are preferably made as the end transverse walls of the groove (7), which is axially parallel to one surface of the toothed rack (4).

Electric motor drive according to claims 1 and 2, characterized in that the end positions of the groove (7) are so arranged that it is located in one or the other end position of the groove (7) on the toothed rack (4) with respect to the end switch (8). ) when the drawer is in front of a fully closed or open position, preferably to the extent that it is not possible to insert, for example, into the slot of the closed drawer. fingers.

31322.doc / XII-04 / D-35-Vr

Ί

Electric motor drive according to claims 1 to 3, characterized in that at the moment when it detects the end switch (8) of one of the elements (6), the electronic assembly (10) switches to a slower closing or opening speed of the drawer.

Electric motor drive according to claims 1 to 4, characterized in that the assembly (10) is based on the data detected by the element (12) for measuring the overload of the electric motor (1) and at the predicted time interval determined by the element (13) to determine the time delay in the state of overload of the electric motor (1), disconnect the electric motor (1) in the electric condition, provided that the limit switch (8) detects one of the elements (6) that determines the final open or closed position of the drawer or their closest an area where it is assumed that no obstructions can occur in the drawer.

Electric motor drive according to claims 1 to 5, characterized in that the assembly (10) is based on the data detected by the element (12) for measuring the overload of the electric motor (1) and at the predicted time interval determined by the element (13) for determining the time delay in the state of overload of the electric motor (1), provided that the limit switch (8) detects the position of the drawer in the open or closed position, or close to these positions, with its lever (9) being located anywhere between elements (6) on the toothed rack (4), electrically switch the electric motor (1) in the opposite direction of rotation for a specified time, as defined by the element (13) for determining the time delay.

Electric motor drive according to claims 1 to 6, characterized in that the preferred estimated overload time is about 300 ms.

Electric motor drive according to claims 1 to 7, characterized in that the preferred estimated rotation time to the opposite side of the electric motor (1) is after the detection of the motor motor overload element (12) and the simultaneous positioning of the drawer

31322.doc / XI l-04 / D-35-Vr anywhere except in the closed or open position or in their vicinity, about 300 ms.

Electric motor drive according to claims 1 to 8, characterized in that after each stop of the electric motor (1) its reactivation is only possible by manually pressing the button (11).

Electric motor drive according to claims 1 to 9, characterized in that the toothed rack (4) is slidably mounted directly in the sections (14) in the housing (5).

Electric motor drive according to claims 1 to 10, characterized in that, in order to measure the electric motor overload, the change in current in the electric motor (1) is preferably measured.