ES2238152B1 - SAFETY DEVICE FOR COLLECTOR MOTORS. - Google Patents

SAFETY DEVICE FOR COLLECTOR MOTORS.

Info

Publication number
ES2238152B1
ES2238152B1 ES200302005A ES200302005A ES2238152B1 ES 2238152 B1 ES2238152 B1 ES 2238152B1 ES 200302005 A ES200302005 A ES 200302005A ES 200302005 A ES200302005 A ES 200302005A ES 2238152 B1 ES2238152 B1 ES 2238152B1
Authority
ES
Spain
Prior art keywords
brushes
safety device
brush
rotor
stop
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.)
Expired - Fee Related
Application number
ES200302005A
Other languages
Spanish (es)
Other versions
ES2238152A1 (en
Inventor
Miguel Javier Caparros Ezpeleta
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 Electrodomesticos Espana SA
Original Assignee
BSH Electrodomesticos Espana SA
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 Electrodomesticos Espana SA filed Critical BSH Electrodomesticos Espana SA
Priority to ES200302005A priority Critical patent/ES2238152B1/en
Priority to EP04019419A priority patent/EP1507320A1/en
Publication of ES2238152A1 publication Critical patent/ES2238152A1/en
Application granted granted Critical
Publication of ES2238152B1 publication Critical patent/ES2238152B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/38—Brush holders
    • H01R39/40—Brush holders enabling brush movement within holder during current collection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/38—Brush holders
    • H01R39/41—Brush holders cartridge type
    • H01R39/415—Brush holders cartridge type with self-recoiling spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/58—Means structurally associated with the current collector for indicating condition thereof, e.g. for indicating brush wear

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Abstract

Dispositivo de seguridad para motores de colector preferiblemente de aparatos electrodomésticos como lavadoras que se basa en que las escobillas (1) del motor de colector incorpora un tope (6) que evita que las escobillas (1) sigan desplazándose una vez alcanzado un determinado grado de desgaste de las mismas, evitando con ello que el extremo (1'') de las escobillas no contacte correctamente con el rotor (2) del motor, produciendo fallos de funcionamiento en éste, apercibiendo al usuario de que debe cambiar dichas escobillas (1). El tope (6) constitutivo del dispositivo de seguridad puede materializarse, por ejemplo, mediante un resalte en forma de cuña que hace tope contra un escalón o resalte (7) previsto al efecto en el soporte (6) de desplazamiento y guiado de la propia escobilla (1).Safety device for collector motors, preferably of household appliances such as washing machines, based on the fact that the brushes (1) of the collector motor incorporate a stop (6) that prevents the brushes (1) from moving after reaching a certain degree of wear of the same, avoiding that the end (1 '') of the brushes does not contact the rotor (2) of the motor correctly, causing malfunctions in the motor, warning the user that he must change these brushes (1) . The stop (6) constituting the safety device can be materialized, for example, by means of a wedge-shaped projection that stops against a step or projection (7) provided for this purpose in the support (6) for movement and guidance of the proper brush (1).

Description

Dispositivo de seguridad para motores de colector.Safety device for engines manifold.

Campo técnico de aplicación de la invenciónTechnical field of application of the invention

La presente invención se engloba en el campo técnico de los dispositivos de seguridad para motores de colector preferiblemente de aparatos electrodomésticos como lavadoras, en las que el rotor del motor es accionado a través del contacto de unas escobillas alimentadas eléctricamente y presionadas constantemente contra el propio rotor hasta el final de desgaste de aquéllas.The present invention is encompassed in the field Safety device technician for collector motors preferably of household appliances such as washing machines, in which the motor rotor is driven through the contact of brushes powered electrically and pressed constantly against the rotor itself until the end of wear of those.

Antecedentes de la invenciónBackground of the invention

Los motores de colector basan su funcionamiento en el contacto de unas escobillas alimentadas eléctricamente contra el rotor del propio motor, escobillas que están relacionadas con un medio elástico que tiende a empujarlas constantemente hacia el rotor para mantener el contacto y asegurar el correcto funcionamiento del motor.Collector motors base their operation at the contact of brushes electrically powered against the rotor of the motor itself, brushes that are related to a elastic medium that tends to constantly push them towards the rotor to maintain contact and ensure correct engine operation

Lógicamente, el contacto y correspondiente rozamiento de las escobillas con el rotor produce un desgaste de aquéllas, aunque el empuje de los elementos elásticos asociados a las escobillas hace que éstas siempre estén empujadas hacia el rotor.Logically, the contact and corresponding Brush friction with the rotor causes wear of those, although the thrust of the elastic elements associated with the brushes make them always pushed towards the rotor.

Ahora bien, cuando se alcanza un grado final de desgaste de las escobillas, el contacto del cable de alimentación eléctrica con el rotor produce cortocircuitos en el motor, produciendo la destrucción de éste, a la vez de que se destruye la electrónica asociada al motor, lo que origina un grave perjuicio para el usuario puesto que en ese caso la reparación de la electrónica del propio motor es tan costosa como la adquisición de una máquina nueva.Now, when a final grade of brush wear, power cord contact electric with the rotor produces short circuits in the motor, producing the destruction of it, while destroying the electronics associated with the engine, which causes serious damage for the user since in that case the repair of the Engine electronics itself is as expensive as acquiring A new machine

Aunque no existen medios de protección del motor frente a ese tipo de fallos, sí que se conocen máquinas que incorporan medios de protección de la electrónica para protegerla de este tipo de fallos de motor, aunque esos medios de protección llevan consigo un encarecimiento del producto final, en este caso, de la máquina lavadora.Although there are no motor protection means Faced with these types of failures, machines are known that incorporate electronic protection means to protect it of this type of engine failure, although those means of protection they carry an increase in the final product, in this case, of the washing machine.

Descripción de la invenciónDescription of the invention

La presente invención, según se expresa en el enunciado de esta memoria descriptiva, se refiere a un dispositivo de seguridad para motores de colector de aparatos electrodomésticos, aplicable concretamente a lavadoras en las que el rotor del motor es accionado a través de contacto de unas escobillas alimentadas eléctricamente y presionadas constantemente contra el propio rotor hasta el desgaste de aquéllas.The present invention, as expressed in the set forth in this specification, refers to a device safety for device collector motors appliances, specifically applicable to washing machines in which the  motor rotor is driven through contact of ones brushes powered electrically and constantly pressed against the rotor itself until their wear.

El objeto de la invención es proporcionar un dispositivo o medio que impide que las escobillas sigan desplazándose hacia el rotor una vez alcanzado un grado determinado de desgaste de éstas, provocando un fallo no destructivo del motor antes de que se inutilice el motor como consecuencia del cortocircuito que se produciría cuando las escobillas se desgastasen en su totalidad.The object of the invention is to provide a device or medium that prevents brushes from following moving towards the rotor once a certain degree has been reached of wear of these, causing a non-destructive engine failure before the engine is disabled as a result of short circuit that would occur when the brushes were wear out completely.

El dispositivo objeto de la invención está previsto para evitar los problemas e inconvenientes referidos con anterioridad, y más concretamente para conseguir que las escobillas alcancen un grado de desgaste ligeramente inferior al desgaste que produciría los cortocircuitos.The device object of the invention is intended to avoid the problems and inconveniences referred to with before, and more specifically to get brushes reach a degree of wear slightly lower than the wear that It would produce the short circuits.

En tal sentido, se ha previsto que las escobillas incorporen un tope que va a actuar como limitador del desplazamiento de las mismas, antes del final de su desgaste total, lo que evita los cortocircuitos, produciéndose fallos no destructivos en el motor, indicando que es necesario llevar a cabo el cambio de las escobillas, pero sin haber producido ningún tipo de avería en el motor ni por supuesto en la electrónica de protección del mismo.In that sense, it is planned that the brushes incorporate a cap that will act as a limiter of the displacement thereof, before the end of its total wear, which prevents short circuits, faults not occurring destructive in the engine, indicating that it is necessary to carry out the change of the brushes, but without having produced any type of failure in the engine or of course in the electronics of protection of it.

El dispositivo de tope puede estar materializado bien por un saliente en forma de cuña de la propia escobilla, bien por un elemento adicional a la misma, bien por un casquillo que actuaría como tope, bien por un cable que llegado un momento determinado impediría el desplazamiento de la escobilla hacia el rotor, etc.The stopper device may be materialized either by a wedge-shaped projection of the brush itself, well for an additional element to it, either for a socket that would act as a stop, either for a cable that arrived a moment determined would prevent the brush from moving towards the rotor, etc.

De esta manera, al acercarse al final de la vida útil de las escobillas, el motor comenzará a dar fallos de funcionamiento, puesto que el dispositivo de seguridad, en cualquiera de sus realizaciones, actuará de manera tal que evita un mayor desgaste de las escobillas y en consecuencia evita el desplazamiento de las mismas hacia el rotor, produciéndose fallos no destructivos del motor en virtud de que éste no girará correctamente, obligando al usuario a llevar a cabo el cambio de las escobillas, con un coste mínimo para que la máquina o lavadora pueda seguir funcionando correctamente.In this way, when approaching the end of life useful of the brushes, the motor will start to fail operation, since the safety device, in any of its embodiments, will act in a way that avoids a greater wear of the brushes and consequently avoids displacement of the same towards the rotor, producing failures non-destructive engine because it will not turn correctly, forcing the user to carry out the change of the brushes, with a minimum cost for the machine or washing machine It can continue to function properly.

Breve descripción de los dibujosBrief description of the drawings

Para complementar la descripción que seguidamente se va a realizar y con objeto de ayudar a una mejor comprensión de las características del invento, se acompaña a la presente memoria descriptiva de un juego de dibujos en base a los cuales se comprenderán más fácilmente las innovaciones y ventajas del dispositivo de seguridad para motores de colector realizado de acuerdo con el objeto de la invención.To complement the description below is going to be done and in order to help a better understanding of The characteristics of the invention are attached herein descriptive of a set of drawings based on which they will more easily understand the innovations and advantages of safety device for collector motors made of according to the object of the invention.

Figura 1.- Muestra una vista lateral de la aplicación del dispositivo de seguridad en una forma de realización preferente de la invención, viéndose la correspondiente escobilla en su fase inicial, es decir, sin desgaste alguno.Figure 1.- Shows a side view of the application of the safety device in one embodiment preference of the invention, the corresponding brush being seen in its initial phase, that is, without any wear.

Figura 2.- Muestra una vista como la de la figura anterior pero con la escobilla en su fase final de desgaste, a partir del cual y como consecuencia del dispositivo de seguridad resulta imposible que esa escobilla se siga desgastando por impedir el desplazamiento de la misma el tope que incorpora como dispositivo de seguridad.Figure 2.- Shows a view like the one in the figure previous but with the brush in its final phase of wear, to from which and as a consequence of the safety device it is impossible for that brush to wear out because it prevents the displacement of the same the stop that incorporates as a device  of security.

Descripción de la forma de realización preferenteDescription of the preferred embodiment

Como se puede ver en las figuras referidas, el dispositivo de seguridad de la invención es aplicable a motores de colector, como pueden ser los motores de determinados aparatos electrodomésticos tales como lavadoras y similares. En este tipo de motores, existen unas escobillas 1 con su extremo 1' enfrentado y en contacto con el rotor 2 del correspondiente motor, mientras que sobre el extremo opuesto va insertado un cable de alimentación eléctrica 3, estando asociado a este extremo de la escobilla 1 un elemento elástico, tal como un muelle 4 o similar, que tiende a empujar constantemente a la escobilla 1 hacia el rotor 2, para que el extremo 1' de aquélla contacte con el rotor.As you can see in the referred figures, the safety device of the invention is applicable to motors of collector, such as the engines of certain devices appliances such as washing machines and the like. In this kind of motors, there are brushes 1 with their end 1 'facing and in contact with the rotor 2 of the corresponding motor, while a power cable is inserted over the opposite end electric 3, being associated to this end of the brush 1 a elastic element, such as a spring 4 or the like, which tends to constantly push the brush 1 towards the rotor 2, so that the 1 'end of it contacts the rotor.

De esta manera, y al estar constantemente empujada la escobilla 1 por el elemento elástico o muelle 4, el rozamiento de su extremo 1' contra el rotor 2 lleva consigo un desgaste de aquélla, de manera que llegado un momento la escobilla 1 puede establecer contacto con el rotor 2 a través de la parte insertada del cable de alimentación eléctrica 3, que corresponde al tramo "d" que determina la zona crítica en la que si se continúa el desgaste de la escobilla 1 es cuando se producen los cortocircuitos y por tanto la destrucción del motor y la electrónica asociada al mismo.In this way, and being constantly the brush 1 pushed by the elastic element or spring 4, the friction of its end 1 'against the rotor 2 carries with it a wear of it, so that the brush has come a moment 1 can establish contact with rotor 2 through the part inserted from the power supply cable 3, which corresponds to the section "d" that determines the critical zone in which if brush wear continues 1 is when the short circuits and therefore the destruction of the motor and the electronics associated with it.

Pues bien, la novedad de la invención consiste en que dicha escobilla 1 incorpora un dispositivo de seguridad materializado por un tope 6, de manera que cuando se haya producido un determinado desgaste de la escobilla 1 ese tope 6 limita el desplazamiento de dicha escobilla 1 al incidir contra un tope o escalón complementario 7 previsto en el elemento de soporte y deslizamiento 5 de la propia escobilla 1.Well, the novelty of the invention consists in that said brush 1 incorporates a safety device materialized by a stop 6, so that when it has occurred a certain brush wear 1 that stop 6 limits the displacement of said brush 1 when hitting a stopper or complementary step 7 provided in the support element and sliding 5 of the brush itself 1.

Como se puede ver en la figura 2, el desgaste de la escobilla 1 es tal que el tope 6 alcanza el escalón 7 impidiendo que dicha escobilla 1 se siga desgastando, produciendo en consecuencia fallos en el motor, indicando que es necesario cambiar las escobillas 1 para que el motor siga funcionando correctamente, viéndose que el tope 6 está situado en un punto anterior al tramo considerado como zona crítica de destrucción del motor, y que es el tramo referenciado con "d" referido con anterioridad.As you can see in figure 2, the wear of the brush 1 is such that the stop 6 reaches the step 7 preventing that said brush 1 continues to wear, producing consequent engine failures, indicating that it is necessary to change the brushes 1 so that the motor continues to function correctly, seeing that the stop 6 is located at a point before the section considered as a critical zone of engine destruction, and that is the section referenced with "d" referred to previously.

El tope 6 constitutivo del medio de seguridad, en combinación con el resalte o escalón 7 del soporte 5 de deslizamiento de la escobilla, puede estar materializado por un resalte en forma de cuña tal y como se representa en las figuras, o bien estar materializado con cualquier otra forma o por otro elemento siempre que actúe limitando el desplazamiento de la escobilla 1 una vez alcanzado un grado de desgaste determinado.The stop 6 constituting the safety means, in combination with the shoulder or step 7 of the support 5 of brush slip, may be materialized by a highlight wedge-shaped as shown in the figures, or either be materialized in any other way or by another element as long as it acts limiting the displacement of the brush 1 once a certain degree of wear has been reached.

Claims (4)

1. Dispositivo de seguridad para motores de colector preferiblemente de aparatos electrodomésticos como lavadoras, en las que el rotor del motor es accionado a través del contacto de unas escobillas alimentadas eléctricamente y presionadas constantemente contra el propio rotor hasta el final de desgaste de aquéllas, caracterizado porque está constituido por un elemento de tope (6) incorporado en las escobillas (1), para impedir su desplazamiento y provocar fallos en el contacto de éstas con el rotor (2) una vez alcanzado un determinado grado de desgaste de las mismas.1. Safety device for collector motors preferably of household appliances such as washing machines, in which the motor rotor is driven through the contact of electrically powered brushes and constantly pressed against the rotor itself until the end of wear of those, characterized because it is constituted by a stop element (6) incorporated in the brushes (1), to prevent its displacement and cause failures in their contact with the rotor (2) once a certain degree of wear of the brushes has been reached. 2. Dispositivo de seguridad para motores de colector de aparatos electrodomésticos, según reivindicación 1, caracterizado porque el tope (6) está constituido por un resalte en forma de cuña situado en la superficie lateral de la propia escobilla, previsto para topar contra un saliente o escalón (7) establecido al efecto en el soporte (5) de deslizamiento de la propia escobilla (1).2. Safety device for collector motors of household appliances, according to claim 1, characterized in that the stop (6) is constituted by a wedge-shaped projection located on the side surface of the brush itself, provided for bumping against a projection or step (7) established for this purpose on the sliding support (5) of the brush itself (1). 3. Dispositivo de seguridad para motores de colector de aparatos electrodomésticos, según reivindicación 1, caracterizado porque el tope (6) es susceptible de estar constituido por un casquillo asociado a la propia escobilla (1).3. Safety device for collector motors of household appliances, according to claim 1, characterized in that the stop (6) is capable of being constituted by a bushing associated with the brush itself (1). 4. Dispositivo de seguridad para motores de colector de aparatos electrodomésticos, según reivindicación 1, caracterizado porque el tope (6) es susceptible de estar constituido mediante un cable (3) limitador del desplazamiento de la escobilla (1) correspondiente.4. Safety device for collector motors of household appliances, according to claim 1, characterized in that the stop (6) is capable of being constituted by a cable (3) limiting the movement of the corresponding brush (1).
ES200302005A 2003-08-14 2003-08-14 SAFETY DEVICE FOR COLLECTOR MOTORS. Expired - Fee Related ES2238152B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES200302005A ES2238152B1 (en) 2003-08-14 2003-08-14 SAFETY DEVICE FOR COLLECTOR MOTORS.
EP04019419A EP1507320A1 (en) 2003-08-14 2004-08-16 Safety device for commutator motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200302005A ES2238152B1 (en) 2003-08-14 2003-08-14 SAFETY DEVICE FOR COLLECTOR MOTORS.

Publications (2)

Publication Number Publication Date
ES2238152A1 ES2238152A1 (en) 2005-08-16
ES2238152B1 true ES2238152B1 (en) 2006-05-16

Family

ID=33560941

Family Applications (1)

Application Number Title Priority Date Filing Date
ES200302005A Expired - Fee Related ES2238152B1 (en) 2003-08-14 2003-08-14 SAFETY DEVICE FOR COLLECTOR MOTORS.

Country Status (2)

Country Link
EP (1) EP1507320A1 (en)
ES (1) ES2238152B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005060324B4 (en) * 2005-12-16 2021-03-18 Robert Bosch Gmbh Detection of the wear of a motor control

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784856A (en) * 1972-07-31 1974-01-08 Gen Electric Brush holder assembly
NL7802617A (en) * 1977-05-12 1978-11-14 Siemens Ag BRUSH HOLDER.
GB2201299B (en) * 1987-02-16 1991-05-22 Johnson Electric Ind Mfg Brush protection in an electric motor
FR2738407B1 (en) * 1995-06-27 1997-09-26 Paul Legras COAL ENGINE GUIDE

Also Published As

Publication number Publication date
ES2238152A1 (en) 2005-08-16
EP1507320A1 (en) 2005-02-16

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