ES2552365A1 - Fixing device, fixing system, washing machine with fixing system and method for manufacturing the fixing device (Machine-translation by Google Translate, not legally binding) - Google Patents
Fixing device, fixing system, washing machine with fixing system and method for manufacturing the fixing device (Machine-translation by Google Translate, not legally binding) Download PDFInfo
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- ES2552365A1 ES2552365A1 ES201430779A ES201430779A ES2552365A1 ES 2552365 A1 ES2552365 A1 ES 2552365A1 ES 201430779 A ES201430779 A ES 201430779A ES 201430779 A ES201430779 A ES 201430779A ES 2552365 A1 ES2552365 A1 ES 2552365A1
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- fixing device
- tubular portion
- fixing
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- washing machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/02—Nuts or like thread-engaging members made of thin sheet material
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
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DISPOSITIVO DE FIJACION, SISTEMA DE FIJACION, MAQUINA LAVADORA CON SISTEMA DE FIJACION Y PROCEDIMIENTO DE FABRICACION DE DISPOSITIVO DE FIJACIONFIXING DEVICE, FIXING SYSTEM, WASHING MACHINE WITH FIXING SYSTEM AND FIXING DEVICE MANUFACTURING PROCEDURE
DESCRIPCIONDESCRIPTION
La presente invention se refiere a un dispositivo de fijacion que comprende una portion tubular con un paso axial que tiene una pared interior roscada, que define un eje de roscado, y una section de arandela, que se extiende desde la porcion tubular en una direction radial de alejamiento respecto al eje de roscado, donde la porcion tubular y la seccion de arandela estan realizados de una pieza mediante estampacion de chapa de metal.The present invention relates to a fixing device comprising a tubular portion with an axial passage having a threaded inner wall, which defines a threaded shaft, and a washer section, which extends from the tubular portion in a radial direction. away from the threading axis, where the tubular portion and the washer section are made in one piece by stamping sheet metal.
El dispositivo de fijacion de la invencion encuentra aplicacion por ejemplo en la fijacion de componentes de maquina lavadora, tal como en la fijacion de una polea de transmision a un eje de tambor o de un contrapeso a una cuba.The fixing device of the invention finds application, for example, in the fixing of washing machine components, such as in fixing a transmission pulley to a drum shaft or a counterweight to a tank.
La union de la polea de transmision al eje del tambor de una maquina lavadora es un punto clave, ya que si no es una fijacion firme se corre el riesgo de que se suelte e inutilice la maquina lavadora. Se requieren por ello fijaciones que eviten completamente el movimiento relativo entre la polea y el eje del tambor.The union of the transmission pulley to the drum axis of a washing machine is a key point, since if it is not a firm fixation, there is a risk that the washing machine will be released and rendered useless. Therefore, fixings are required that completely prevent the relative movement between the pulley and the drum shaft.
Los dispositivos de fijacion de poleas son generalmente caros y complejos, ya que requieren un par de apriete muy alto para garantizar la buena transmision de los pares generados por el motor. Actualmente se utilizan los tres sistemas siguientes:The pulley fixing devices are generally expensive and complex, since they require a very high tightening torque to ensure the good transmission of the torque generated by the engine. Currently the following three systems are used:
- Tuercas rlgidas de metrica muy grande y pares de torsion altos.- Rigid nuts of very large metric and high torque.
- Eje del tambor con un extremo dotado de chaflanes y fijaciones que clavan o sujetan las poleas que, a su vez, disponen de chaflanes complementarios como en GB2412711. En su conexion inevitablemente hay una tolerancia que con el tiempo puede soltar la fijacion.- Drum shaft with one end equipped with chamfers and fasteners that nail or hold the pulleys which, in turn, have complementary chamfers as in GB2412711. In your connection there is inevitably a tolerance that can eventually release the fixation.
- Mediante una arandela elastica y una tuerca que aplica el par. La arandela elastica mantiene el par y elimina las perdidas por relajacion de los materiales que componen la union. Es una conexion fiable pero requiere la arandela adicional, lo que encarece el producto y los posibles errores de montaje.- Using an elastic washer and a nut that applies the torque. The elastic washer maintains the torque and eliminates the losses due to relaxation of the materials that make up the union. It is a reliable connection but requires the additional washer, which makes the product more expensive and possible mounting errors.
Los dispositivos de fijacion del estado de la tecnica basados en una tuerca rlgida tienen el problema de que pierden par de apriete con el uso. Por ejemplo, un par de apriete inicial de 90 Nm puede disminuir hasta 70 Nm. La seccion del eje del tambor donde se une la polea,The devices for fixing the state of the art based on a rigid nut have the problem that they lose tightening torque with use. For example, an initial torque of 90 Nm can decrease up to 70 Nm. The section of the drum shaft where the pulley is attached,
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tiene por ello un chaflan donde encaja la polea, para evitar el giro relativo entre ambos en el caso de que la tuerca pierda par de apriete. Este chaflan implica tener que alargar el eje unos millmetros mas.It therefore has a chamfer where the pulley fits, to avoid the relative rotation between the two in the event that the nut loses torque. This chamfer implies having to extend the axis a few more millimeters.
La fijacion con chaflan necesita una tolerancia para introducir el orificio de la polea, lo que provoca que en ocasiones se monte la polea girada respecto al eje todo lo que permite la tolerancia. Si se enrosca la tuerca en esa posicion, durante el funcionamiento de la maquina, la polea tendera a ocupar su posicion correcta al poco tiempo, aflojando la tuerca y desmontando la fijacion, lo que acaba danando la maquina lavadora.The chamfer fixation requires a tolerance to introduce the hole of the pulley, which sometimes causes the pulley rotated with respect to the axle to allow for tolerance. If the nut is screwed in that position, during the operation of the machine, the pulley will tend to occupy its correct position soon, loosening the nut and dismantling the fixation, which ends up damaging the washing machine.
Actualmente todas o la mayorla de las tuercas se fabrican partiendo de bloques de acero y realizandolas mediante estampacion y/o mecanizado. Dentro de estas tuercas hay una subclase que son las auto bloqueantes, frenantes o anti vibracion.Currently all or most of the nuts are manufactured from steel blocks and made by stamping and / or machining. Within these nuts there is a subclass that are self-blocking, braking or anti vibration.
Practicamente todos los fabricantes consiguen estas tuercas anadiendo material y deformandolas, con lo que se necesita otro espesor de material mas debil (tuercas conocidas como Cleveloc) o anadiendo o enjaulando un material rozante normalmente plastico (conocidas como Nyloc).Virtually all manufacturers get these nuts by adding material and deforming them, which requires another thickness of weaker material (nuts known as Cleveloc) or by adding or caging a normally plastic rubbing material (known as Nyloc).
El auto bloqueo de las tuercas se consigue por el ajuste del cuello de la tuerca contra el tornillo por la deformation al aplicar el par de apriete. Las tuercas Cleveloc presentan el inconveniente frente a las Nyloc del excesivo par de apriete necesario para conseguir el mismo ajuste. Estos dos dispositivos de apriete resultan bastante costosos en su produccion.The self-locking of the nuts is achieved by adjusting the neck of the nut against the screw by deformation when applying the tightening torque. Cleveloc nuts have the disadvantage against the Nyloc of the excessive torque required to achieve the same adjustment. These two clamping devices are quite expensive in their production.
Existen dispositivos de fijacion elasticos en el estado de la tecnica como el descrito en el documento ES2399121A1 realizados por embuticion de chapa metalica que comprenden un paso axial roscado dispuesto en una zona central del dispositivo de fijacion, que define un eje de roscado, una section de arandela elastica, que se extiende desde el paso axial en una direction radial de alejamiento respecto al eje de roscado, y medios de apriete para facilitar el roscado del dispositivo.There are elastic fixing devices in the state of the art such as that described in document ES2399121A1 made by drawing metal sheet comprising a threaded axial passage arranged in a central area of the fixing device, which defines a threaded shaft, a section of threaded elastic washer, which extends from the axial passage in a radial direction away from the threading axis, and tightening means to facilitate the threading of the device.
Este dispositivo aunque mejorado respecto al anteriormente mencionado, sigue presentando el problema de perdidas de apriete.This device although improved compared to the aforementioned, continues to present the problem of loss of tightening.
La presente invention proporciona una solution a la problematica anteriormente expuesta, mediante un dispositivo de fijacion segun la reivindicacion 1, un sistema de fijacion de un componente de maquina lavadora segun la reivindicacion 8, una maquina lavadora segun la reivindicacion 11 y un procedimiento de fabrication del dispositivo de fijacion elastico segunThe present invention provides a solution to the above-mentioned problem, by means of a fixing device according to claim 1, a fixing system of a washing machine component according to claim 8, a washing machine according to claim 11 and a manufacturing process of the elastic fixing device according
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la reivindicacion 9. En las reivindicaciones dependientes se definen realizaciones preferidas de la invention.Claim 9. Preferred embodiments of the invention are defined in the dependent claims.
Asl, en un primer aspecto inventivo, se define un dispositivo de fijacion, que comprende una portion tubular con un paso axial que tiene una pared interior roscada, que define un eje de roscado, y una section de arandela, que se extiende desde la porcion tubular en una direction radial de alejamiento respecto al eje de roscado, donde la porcion tubular y la seccion de arandela estan realizados de una pieza mediante estampacion de chapa de metal, donde el dispositivo de fijacion comprende medios de apriete en la forma de al menos una deformation de la porcion tubular que se extiende hacia el exterior del paso axial.Thus, in a first inventive aspect, a fixing device is defined, which comprises a tubular portion with an axial passage having a threaded inner wall, which defines a threaded shaft, and a washer section, which extends from the portion tubular in a radial direction away from the axis of threading, where the tubular portion and the washer section are made of a piece by stamping sheet metal, where the fixing device comprises means of tightening in the form of at least one deformation of the tubular portion that extends outward from the axial passage.
El dispositivo de fijacion de la invencion permite una union correcta de un componente mediante una unica pieza, con el par de apriete adecuado y que ademas esta fabricada de una unica lamina de chapa estampada incorporando medios para el apriete. De este modo el dispositivo de fijacion de la invencion proporciona un mejor comportamiento en uniones roscadas sometidas a vibraciones y en las cuales el mantenimiento del par de apriete es esencial. El medio de apriete en forma de deformacion hacia el exterior del paso axial garantiza una presion estable y reduce las vibraciones ya que se conforma de tal forma que la tolerancia entre la pared interior roscada y la superficie del eje es muy ajustada, incluso permitiendo que sea negativa lo que al enroscar el dispositivo de fijacion al eje, el diametro de la porcion tubular puede aumentar ligeramente aumentando la presion del dispositivo contra el eje.The fixing device of the invention allows a correct union of a component by means of a single piece, with the appropriate tightening torque and which is also made of a single sheet of stamped sheet incorporating means for tightening. In this way the fixing device of the invention provides a better performance in threaded joints subjected to vibrations and in which the maintenance of the tightening torque is essential. The tightening means in the form of deformation towards the outside of the axial passage guarantees a stable pressure and reduces the vibrations since it is formed in such a way that the tolerance between the threaded inner wall and the axis surface is very tight, even allowing it to be negative, which by screwing the fixing device to the shaft, the diameter of the tubular portion may increase slightly by increasing the pressure of the device against the shaft.
Ademas, el uso de un dispositivo de fijacion como el de la invencion, permite la fijacion del componente sin necesidad de chaflan antigiro en el eje de fijacion donde se acopla el componente ya que no pierde par de apriete, sino que lo mantiene constantemente durante la vida de la maquina.In addition, the use of a fixing device such as that of the invention, allows the fixation of the component without the need for an anti-rotation chamfer on the fixing axis where the component is coupled since it does not lose tightening torque, but keeps it constantly during Machine life.
Otras ventajas que presenta el dispositivo de fijacion de la invencion son la disminucion del coste, la facilidad de montaje, la elimination de referencias de piezas y la garantla de la union de los componentes.Other advantages presented by the fixing device of the invention are the decrease in cost, ease of assembly, elimination of references of parts and the guarantee of the union of the components.
Ventajosamente, los medios de apriete proporcionados en el dispositivo de fijacion permiten un facil roscado a la contra-rosca donde vaya a ser instalado mediante una herramienta adecuada, manual o automatica.Advantageously, the tightening means provided in the fixing device allow easy threading to the counter thread where it is to be installed by means of a suitable tool, manual or automatic.
En una realization la deformacion se extiende paralela al eje de roscado lo que facilita la fabricacion del dispositivo.In one embodiment the deformation extends parallel to the threading axis which facilitates the manufacture of the device.
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La deformacion bien puede ser por adicion de material a la rosca o por una deformacion del cuello de la porcion tubular. De este modo, aunque la fuerza requerida para el apriete va a ser mayor, la presion con la contra-rosca va a asegurar un apriete duradero. Una realization particular la section transversal de la deformacion tiene forma de copa, especialmente interesante cuando la deformacion se extiende verticalmente paralela al eje roscado por toda la longitud de la porcion tubular. Esto tiene la ventaja adicional de que con una porcion tubular de seccion hexagonal en la que las deformaciones estan realizadas en sus vertices, la llave de apriete, tipo llave inglesa, va a tener mejor agarre y se va a poder apretar mejor.The deformation may be due to the addition of material to the thread or a deformation of the neck of the tubular portion. Thus, although the force required for the tightening will be greater, the pressure with the counter-thread will ensure a lasting tightening. A particular embodiment of the cross section of the deformation is cup-shaped, especially interesting when the deformation extends vertically parallel to the threaded axis along the entire length of the tubular portion. This has the additional advantage that with a tubular portion of hexagonal section in which the deformations are made in its vertices, the tightening wrench, type wrench, will have a better grip and will be able to be tightened better.
De otro modo, la seccion transversal de la deformacion tiene forma angular, muy recomendable cuando la deformacion solo se extiende por el extremo de la porcion tubular contrario a la seccion de arandela y se mecaniza deformando este cuello hacia el interior. Esta deformacion puede realizarse en las aristas.Otherwise, the cross section of the deformation has an angular shape, highly recommended when the deformation only extends through the end of the tubular portion opposite to the washer section and is machined by deforming this neck inwards. This deformation can be performed on the edges.
Como se ha mencionado, la pared externa de la porcion tubular tiene un contorno poligonal, preferentemente hexagonal. En este tipo de medios de apriete mas usuales cabe utilizar herramientas muy comunes del tipo llave inglesa.As mentioned, the outer wall of the tubular portion has a polygonal contour, preferably hexagonal. In this type of most common means of tightening, very common tools of the wrench type can be used.
En una realizacion, el dispositivo de fijacion elastico comprende una seccion de arandela que presenta un perfil transversal con simetrla de revolution respecto al eje de roscado. En este caso, el perfil transversal de la seccion de arandela puede comprender preferentemente una porcion de apoyo y una porcion inclinada sustancialmente respecto a la porcion de apoyo.In one embodiment, the elastic fixing device comprises a washer section that has a cross profile with revolution symmetry with respect to the threading axis. In this case, the transverse profile of the washer section may preferably comprise a support portion and a substantially inclined portion relative to the support portion.
En una realizacion preferida, la porcion de apoyo presenta un extremo libre distanciado respecto a la superficie en la que apoya la seccion de arandela en la position de instalacion del dispositivo de fijacion elastico. La porcion de apoyo puede tener una forma sustancialmente convexa respecto a la superficie en la que apoya. De este modo se conforma un reborde de seccion de arandela que proporciona la ventaja de evitar entalladuras en la superficie en la que apoya el dispositivo asl como facilitar el deslizamiento de la seccion de arandela contra dicha superficie durante la instalacion.In a preferred embodiment, the support portion has a free end spaced apart from the surface on which the washer section rests in the installation position of the elastic fixing device. The support portion may have a substantially convex shape with respect to the surface on which it rests. In this way a washer section flange is formed that provides the advantage of avoiding notches in the surface on which the device rests as well as facilitating the sliding of the washer section against said surface during installation.
En una realizacion, el dispositivo de fijacion elastico se obtiene de una unica pieza, preferentemente por estampacion de una chapa metalica acero inoxidable o acero. En el contexto de la invention el termino de "chapa” incluye el concepto de "placa”.In one embodiment, the elastic fixing device is obtained from a single piece, preferably by stamping a metal sheet stainless steel or steel. In the context of the invention the term "sheet" includes the concept of "plate".
En una realizacion en que el dispositivo de fijacion se obtiene de una chapa metalica, el paso axial roscado se obtiene por un proceso de laminado. En una realizacion el dispositivo de fijacion esta realizado en acero templado o acero muelle. El uso de estos materiales esIn an embodiment in which the fixing device is obtained from a metal plate, the threaded axial passage is obtained by a rolling process. In one embodiment, the fixing device is made of tempered steel or spring steel. The use of these materials is
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especialmente ventajoso porque ademas de presentar las propiedades elasticas que requiere el dispositivo son materiales de gran calidad.Especially advantageous because in addition to presenting the elastic properties required by the device are high quality materials.
En un segundo aspecto inventivo, se define un sistema de fijacion de un componente de maquina lavadora que comprende un dispositivo de fijacion elastico segun el primer aspecto inventivo.In a second inventive aspect, a fixing system of a washing machine component is defined which comprises an elastic fixing device according to the first inventive aspect.
En un tercer aspecto inventivo se define una lavadora que comprende un dispositivo de fijacion elastico segun el primer aspecto inventivo.In a third inventive aspect a washing machine is defined which comprises an elastic fixing device according to the first inventive aspect.
En un cuarto aspecto inventivo se define un procedimiento de fabrication de un dispositivo de fijacion elastico segun el primer aspecto inventivo. El procedimiento comprende las siguientes etapas: Estampacion de una chapa metalica, que comprende la obtencion por estampacion de una section de arandela y/o de una portion tubular que sobresale de una zona central de la seccion de arandela; apertura del paso axial; laminado de la porcion tubular, que comprende la obtencion por laminado de una seccion roscada en la porcion tubular; mecanizado de los medios de apriete preferiblemente por estampado. Adicionalmente se puede aplicar posteriormente un tratamiento termico, preferentemente templado, de la chapa metalica estampada y laminada.In a fourth inventive aspect a manufacturing process of an elastic fixing device is defined according to the first inventive aspect. The process comprises the following steps: Stamping of a metal sheet, which comprises obtaining by stamping a washer section and / or a tubular portion that protrudes from a central area of the washer section; axial passage opening; rolling of the tubular portion, which comprises obtaining by rolling a threaded section in the tubular portion; machining of the tightening means preferably by stamping. Additionally, a heat treatment, preferably tempered, of the stamped and laminated metal sheet can be subsequently applied.
La estampacion, laminado y tratamiento termico permite conferir al dispositivo de propiedades mecanicas adecuadas tales como dureza, elasticidad y resistencia. Especialmente, es posible obtener un dispositivo de fijacion elastico con un llmite elastico y resistencia mecanica elevados. Ademas, el procedimiento proporciona la ventaja de su coste reducido y por tanto del coste reducido la pieza fabricada mediante el mismo. En especial en comparacion con las tuercas de fijacion convencionales utilizadas en los sistemas de fijacion de un componente como la polea del tambor de lavadoras, que se obtienen por torneado o mecanizado.The stamping, laminating and heat treatment allow the device to provide suitable mechanical properties such as hardness, elasticity and strength. Especially, it is possible to obtain an elastic fixing device with a high elastic limit and mechanical resistance. In addition, the procedure provides the advantage of its reduced cost and therefore of the reduced cost of the part manufactured therewith. Especially in comparison with the conventional fixing nuts used in the fixing systems of a component such as the washing machine drum pulley, which are obtained by turning or machining.
En una realization del procedimiento de fabricacion del dispositivo de fijacion elastico, la etapa de estampacion de la chapa metalica comprende la obtencion por estampacion de una seccion de apriete con una pared de apriete que tiene un perfil poligonal, preferentemente hexagonal, que constituye los medios de apriete.In an embodiment of the manufacturing method of the elastic fixing device, the stamping stage of the metal sheet comprises the obtaining by stamping a clamping section with a clamping wall having a polygonal profile, preferably hexagonal, which constitutes the means of squeeze in.
Todas las caracterlsticas descritas en esta memoria (incluyendo las reivindicaciones, description y dibujos) pueden combinarse en cualquier combination, exceptuando las combinaciones de tales caracterlsticas mutuamente excluyentes.All features described herein (including the claims, description and drawings) may be combined in any combination, except for combinations of such mutually exclusive features.
Para una mejor comprension de la invention, sus objetos y ventajas, se adjuntan a la memoria las siguientes figuras en las que se representa:For a better understanding of the invention, its objects and advantages, the following figures in which it is represented are attached to the memory:
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la figura 1a muestra un dispositivo de fijacion segun una primeraFigure 1a shows a fixing device according to a first
realization de la invention con diferentes medios de apriete,realization of the invention with different means of tightening,
la figura 1b muestra un dispositivo de fijacion de la figura 1a vista en planta,Figure 1b shows a fixing device of Figure 1a plan view,
la figura 2a muestra un dispositivo de fijacion segun una segundaFigure 2a shows a fixing device according to a second
realizacion de la invencion con diferentes medios de apriete,realization of the invention with different means of tightening,
la figura 2b muestra un dispositivo de fijacion de la figura 2a vista en planta,Figure 2b shows a fixing device of Figure 2a plan view,
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la figura 3c muestra un dispositivo de fijacion de la figura 1a y 1b montado en un eje de tambor de una maquina lavadora.Figure 3c shows a fixing device of Figure 1a and 1b mounted on a drum shaft of a washing machine.
En las figuras se muestran dos realizaciones del dispositivo de fijacion 10 de la invencion. Dicho dispositivo comprende un paso axial 2 roscado dispuesto en una zona central del dispositivo de fijacion, que define un eje de roscado 9, una section de arandela 1, que se extiende desde el paso axial en una direction radial de alejamiento respecto al eje de roscado 9, y medios de apriete 6 para facilitar el roscado del dispositivo.In the figures two embodiments of the fixing device 10 of the invention are shown. Said device comprises an axial threaded passage 2 arranged in a central area of the fixing device, which defines a threaded shaft 9, a washer section 1, which extends from the axial passage in a radial direction away from the threaded axis. 9, and tightening means 6 to facilitate threading of the device.
En las figuras 1a y 1b se muestra una primera realizacion del dispositivo de fijacion, que presenta una portion tubular 3 sustancialmente cillndrica que sobresale de una zona central de la seccion de arandela 1. Dicha porcion tubular 3 presenta una rosca 7 interna y configura el paso axial 2 roscado centrado en un eje de roscado 9. El dispositivo de fijacion presenta ademas un canto que sobresale de la periferia de la base de la porcion tubular formando la seccion de arandela 1. La pared exterior 3a de la porcion tubular 3 esta conformada con forma hexagonal. La porcion tubular 3 presenta unas deformaciones verticales, paralelas al eje de roscado, en las seis esquinas del hexagono del medio de apriete, que deforman la rosca 7 de la pared interna 3b formando los medios de apriete. Cuando un dispositivo de fijacion 10 como este se enrosca en un macho contra-rosca, estos medios de apriete 4 se deforman aportando una presion adicional evitando su desmontaje fortuito.A first embodiment of the fixing device is shown in Figures 1a and 1b, which has a substantially cylindrical tubular portion 3 protruding from a central area of the washer section 1. Said tubular portion 3 has an internal thread 7 and configures the passage axial 2 threaded centered on a threaded axis 9. The fixing device also has an edge that protrudes from the periphery of the base of the tubular portion forming the washer section 1. The outer wall 3a of the tubular portion 3 is formed with hexagonal shape The tubular portion 3 has vertical deformations, parallel to the threading axis, in the six corners of the hexagon of the clamping means, which deform the thread 7 of the internal wall 3b forming the clamping means. When a fixing device 10 such as this is screwed into a counter-threaded male, these tightening means 4 are deformed by providing additional pressure avoiding accidental disassembly.
En las figuras 2a y 2b se muestra la segunda realizacion del dispositivo de fijacion, que presenta una porcion tubular 3 sustancialmente cillndrica que sobresale de una zona central de la seccion de arandela 1. Dicha porcion tubular 3 presenta una rosca 7 interna y configura el paso axial 2 roscado centrado en un eje de roscado 9. En esta realizacion la seccion transversal de la deformacion 4 tiene forma angular y solo se encuentra en el extremo de la porcion tubular contrario a la seccion de arandela, extendiendose por la porcion tubular solo en parte. La deformation se mecaniza deformando solo el extremo de la porcion tubular hacia su interior.In Figures 2a and 2b the second embodiment of the fixing device is shown, which has a substantially cylindrical tubular portion 3 protruding from a central area of the washer section 1. Said tubular portion 3 has an internal thread 7 and configures the passage axial 2 threaded centered on a threaded shaft 9. In this embodiment the cross section of the deformation 4 is angular in shape and is only at the end of the tubular portion opposite to the washer section, extending only partially in the tubular portion . The deformation is machined by deforming only the end of the tubular portion inwards.
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En la figura 3 se muestra una seccion del sistema de fijacion de componente de aparato electrodomestico, particularmente de una maquina lavadora, donde el dispositivo de fijacion esta montado en el eje tambor 11 del tambor de una maquina lavadora en el que se fija la polea 12 que transmite el par de rotacion del motor al tambor. El eje tambor 11 tiene una contra-rosca 8 a la que se enrosca la rosca 7 del dispositivo de fijacion 10. Los medios de apriete 4, la deformacion, tienen forma de copa que se extiende verticalmente paralela al eje roscado por toda la longitud de la porcion tubular en cada esquina del su forma hexagonal. La porcion de apoyo 1a de la seccion de arandela 1 se apoya presionando contra el componente, en este caso, la polea 12. El dispositivo de fijacion 10 de la invention permite la fijacion de la polea 12 sin necesidad de chaflan en el eje 11 ya que no pierde par de apriete. Ventajosamente, en el dispositivo de fijacion de la invencion, tanto la rosca 7 como la superficie hexagonal exterior para ser apretado mediante herramienta, estan integrados en la parte tubular del dispositivo de fijacion, reduciendo la altura de la tuerca y de esta forma lograr una altura menor y que sobresalga lo mlnimo hacia la parte trasera de la maquina lavadora.Figure 3 shows a section of the fixing system of the appliance component, particularly of a washing machine, where the fixing device is mounted on the drum axis 11 of the drum of a washing machine in which the pulley 12 is fixed which transmits the rotation torque of the motor to the drum. The drum shaft 11 has a counter-thread 8 to which the thread 7 of the fixing device 10 is screwed. The clamping means 4, the deformation, have a cup-shaped shape that extends vertically parallel to the threaded shaft for the entire length of the tubular portion at each corner of its hexagonal shape. The support portion 1a of the washer section 1 is supported by pressing against the component, in this case, the pulley 12. The fixing device 10 of the invention allows the pulley 12 to be fixed without chamfering on the axis 11 and That does not lose torque. Advantageously, in the fixing device of the invention, both the thread 7 and the outer hexagonal surface to be tightened by tool, are integrated in the tubular part of the fixing device, reducing the height of the nut and thus achieving a height minor and protruding the minimum towards the back of the washing machine.
A pesar de que el dispositivo de fijacion de la invencion se ha descrito en referencia a su aplicacion para la fijacion de una polea 12 a un eje de tambor de lavadora, se entendera que es igualmente aplicable en la fijacion de otros elementos o componentes, en particular de maquinas lavadoras, tal como un contrapeso.Although the fixing device of the invention has been described in reference to its application for fixing a pulley 12 to a washing machine drum shaft, it will be understood that it is equally applicable in fixing other elements or components, in Particular of washing machines, such as a counterweight.
El dispositivo de fijacion estara fabricado preferentemente a partir de una chapa de acero de entre 1.5 mm y 3 mm de grosor, preferiblemente de sustancialmente 2 mm. Por ejemplo puede emplearse un acero al carbono C45E, segun la norma EN-10132. Cuando el dispositivo de fijacion se fabrica a partir de una chapa de acero de aproximadamente 2 mm de grosor de acuerdo con el procedimiento de la invencion, soporta una carga de trabajo de 150 kg/mm2. Ademas, al estar en tension toda la pieza, incluso la rosca 7, tiene la propiedad de ser auto-frenante y presenta mayor resistencia al desapriete.The fixing device will preferably be manufactured from a steel sheet between 1.5 mm and 3 mm thick, preferably substantially 2 mm. For example, a C45E carbon steel can be used, according to EN-10132. When the fixing device is manufactured from a steel sheet approximately 2 mm thick in accordance with the process of the invention, it supports a workload of 150 kg / mm2. In addition, being in tension the entire piece, even the thread 7, has the property of being self-braking and has greater resistance to loosening.
1010
1one
1a1st
1b1 B
22
33
3a3rd
3b3b
44
77
88
99
11eleven
1212
Lista de simbolos de referenciaList of reference symbols
Dispositivo de fijacion Seccion de arandelaFixing device Washer section
Porcion de apoyo de seccion de arandela Porcion inclinada de seccion de arandela Paso axial Porcion tubularSupport portion of washer section Inclined portion of washer section Axial passage Tubular portion
Pared exterior de porcion tubular Pared interior de porcion tubular Medios de apriete RoscaTubular portion outer wall Tubular portion inner wall Tightening means Thread
Contra-rosca Eje de roscado Eje tambor PoleaCounter thread Thread shaft Drum shaft Pulley
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201430779A ES2552365B1 (en) | 2014-05-26 | 2014-05-26 | Fixing device, fixing system, washing machine with fixing system and manufacturing procedure for fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201430779A ES2552365B1 (en) | 2014-05-26 | 2014-05-26 | Fixing device, fixing system, washing machine with fixing system and manufacturing procedure for fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2552365A1 true ES2552365A1 (en) | 2015-11-27 |
| ES2552365B1 ES2552365B1 (en) | 2016-09-14 |
Family
ID=54601440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES201430779A Expired - Fee Related ES2552365B1 (en) | 2014-05-26 | 2014-05-26 | Fixing device, fixing system, washing machine with fixing system and manufacturing procedure for fixing device |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2552365B1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1172427A (en) * | 1913-02-17 | 1916-02-22 | Rockwood Sprinkler Company Of Massachusetts | Nut. |
| US4934859A (en) * | 1988-11-03 | 1990-06-19 | Textron Inc. | Locking nut with multiple thread forming leads |
| EP0488500A1 (en) * | 1990-11-28 | 1992-06-03 | Pac-Fasteners | Scalloped nut and method of construction |
| WO2010111342A1 (en) * | 2009-03-26 | 2010-09-30 | Graco Minnesota Inc. | Contaminant-rejecting screw threads |
| ES2399121A1 (en) * | 2011-06-06 | 2013-03-26 | BSH Electrodomésticos España S.A. | Elastic fixing device |
-
2014
- 2014-05-26 ES ES201430779A patent/ES2552365B1/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1172427A (en) * | 1913-02-17 | 1916-02-22 | Rockwood Sprinkler Company Of Massachusetts | Nut. |
| US4934859A (en) * | 1988-11-03 | 1990-06-19 | Textron Inc. | Locking nut with multiple thread forming leads |
| EP0488500A1 (en) * | 1990-11-28 | 1992-06-03 | Pac-Fasteners | Scalloped nut and method of construction |
| WO2010111342A1 (en) * | 2009-03-26 | 2010-09-30 | Graco Minnesota Inc. | Contaminant-rejecting screw threads |
| ES2399121A1 (en) * | 2011-06-06 | 2013-03-26 | BSH Electrodomésticos España S.A. | Elastic fixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2552365B1 (en) | 2016-09-14 |
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