WO1998027361A1 - Valve-free gas spring, and apparatus for pressurizing such spring - Google Patents

Valve-free gas spring, and apparatus for pressurizing such spring Download PDF

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Publication number
WO1998027361A1
WO1998027361A1 PCT/ES1996/000240 ES9600240W WO9827361A1 WO 1998027361 A1 WO1998027361 A1 WO 1998027361A1 ES 9600240 W ES9600240 W ES 9600240W WO 9827361 A1 WO9827361 A1 WO 9827361A1
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WO
WIPO (PCT)
Prior art keywords
spring
annular
rod
chamber
support
Prior art date
Application number
PCT/ES1996/000240
Other languages
Spanish (es)
French (fr)
Inventor
José Lozano Bonet
Alfredo Lozano Perez
Original Assignee
Lozano Bonet Jose
Alfredo Lozano Perez
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 Lozano Bonet Jose, Alfredo Lozano Perez filed Critical Lozano Bonet Jose
Priority to PCT/ES1996/000240 priority Critical patent/WO1998027361A1/en
Publication of WO1998027361A1 publication Critical patent/WO1998027361A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
    • B23P19/022—Extracting or inserting relatively long parts
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/0209—Telescopic
    • F16F9/0218—Mono-tubular units
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/43—Filling or drainage arrangements, e.g. for supply of gas

Definitions

  • gas springs The basic structure of gas springs is known. All of them have a common assembly, formed by an external housing, a valve at one end, and a mobile device capable of carrying out the movement as such a spring consisting of a stem that has a part inside the chamber and a part outside it, so that the pressure on the outside determines a reaction effect on the inside so that it produces the desired return effect.
  • EP 0490386 A2 per inert gas cylinder responds to the assembly described in the previous paragraph, the valve being indicated under No. 34 of its drawings.
  • ES 2017166 A2 by nitrogen gas spring it is also formed by a set also similar to the one indicated above;
  • the loading valve is indicated by No. 9 of your drawing.
  • the cylinder has a double chamber connected by small diameter holes.
  • ES 2026348 by high performance gas spring presents structural differences with respect to the two mentioned above, and essentially coincides with the aforementioned content as common;
  • the loading valve is represented in the figure under No. 27.
  • the present invention aims at a gas spring without valve and apparatus for pressurizing. It is a constant in the aforementioned background, the presence of the valve.
  • the valve has no effect while the spring is loaded, and in the case of large or medium size springs, the structure modification required by the valve is also not substantial.
  • the increase in length due to the presence of the valve determines a difficulty of difficult solution, because it goes through the need to invent the present apparatus for loading, and modify absolutely the entire manufacturing process of the corresponding assemblies.
  • Figure 1 shows a sectional view of the spring and externally to it, of the pressurizing apparatus in an initial position.
  • Figure 2 shows a view in the same section, in loading position.
  • Figure 3 shows a view in the same section in the loaded position, without releasing the closing ring.
  • Figure 4 shows the view of Figure 3 having been released by expansion in the closing ring.
  • Figure 5 shows the position in which the retraction of the load assembly can be initiated once the spring is closed.
  • Figure 6 shows the spring already loaded, ready to be removed from the load assembly.
  • FIGS 7 to 10 show sequences of the spring head in accordance with Figure 7 with 1, Figure 8 with 2, Figure 9 with 4, and Figure 10 with 6.
  • the positional support of one end of the spring is shown indicated by 1, with 2 the é b olo the positioner pusher arranged internally in the support 1, with 3 the support of the spring body, with 4 the pressure element of the support 3, with 5 the pin, with 6 the open metal springs of the positioner, with 7 the body of the spring, with 8 the spring chamber, with 9 the spring rod, with 10 the rod head 9, with 11 the rod joints, with 12 the support frame of the positioning bracket 1, with 13 the support frame of the support 2, with 14 the chamber of the loading apparatus, with 15 the rod of the pusher piston, with 16 the joints of the pusher piston, with 17 the joint between the support 1 and the support 3 is indicated, with 18 the recess is indicated, annular from the inner mouth of the spring body 7, with 19 the annular pressure retaining body is shown, with 20 the housings for inner joints 11 of the body 19 with the rod 9 are shown, with 21 the outer annular flange and gasket are shown of body 19, with 22 the chavet is indicated ero, with
  • the apparatus that carries out the loading of the dock is in principle inseparable from the dock itself, as can be seen below, although once they have been developed they maintain both completely independent characteristics.
  • the apparatus is formed by a fixed frame and a frame that can be removable, indicated by 12 and 13. It is indifferent which of them acts as fixed, even both could be.
  • the frame indicated with 13 has a pressure element 4 that holds the support 3 of the spring body, which is blind on the side opposite to the position of the spring body 7, and adjusts it on the support 1 with respect to the frame 12 with airtight seal through the seal 17.
  • the spring body 7 Prior to this adjustment, inside the two supports the spring body 7 must be contained within that indicated by 3 and the rod assembly 9 and annular body d e retention 19 within that indicated by 1.
  • the retainer 23 of the metal ring 26 will be provided.
  • the pressure exerted by the springs allows the metal ring 26 to not expand and exit the housing formed between the positioner pusher piston 2 and the retainer 23.
  • both parts do it in solidarity, without changing their relative positions.
  • the springs begin to compress, since as pressure is continued on the rod 15, the positioning pusher piston 2 keep moving forward In said position, the location of the centering 25 inside the mouth of the chamber 8 occurs, and subsequently, the release of the metal ring 26 from the retention of the centering 25, which is, however, retained by the walls of the chamber 8.
  • SUBSTITUTE SHEET (RULE 26) originate in the valves that are the cause of the failure of many of these devices.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

This invention relates to a gas spring which is charged in a pressurized medium, which has no valve and consequently can be of a very small size. It is comprised of a body (7) which forms a chamber (8) wherein is housed an annular pressure retaining body (19) which contains a rod (9) susceptible of exerting a motion to compress the chamber and withstanding the chamber reaction by opposing said motion. The apparatus for pressurizing the gas spring is comprised of two bodies sealed between each other (1 and 3) which are pressurized, and by means of a piston (2) linked to one of the parts, the annular pressure retention body (19) is introduced into the chamber (8) till a metal ring forms the anti-return stop. Industrial application to the fabrication of valve-free gas springs.

Description

Muelle de gas sin válvula, y aparato para su presurizado. Gas spring without valve, and apparatus for pressurized.
El sector de la técnica de esta patente es el de los muelles de gas . Indicación del Estado de la Técnica anterior.The technical sector of this patent is that of gas springs. Indication of the prior art.
Es conocida la estructura básica de los muelles de gas. Todos ellos cuentan con un conjunto común, formado por una carcasa externa, una válvula en un extremo, y un dispositivo móvil susceptible de llevar a cabo el movimiento como tal muelle consistente en un vastago que posee una parte en el interior de la cámara y una parte en el exterior de ésta, de modo que la presión en la parte exterior determina un efecto de reacción en la interna de modo que produce el efecto retorno deseado. EP 0490386 A2 por cilindro de gas inerte, responde al conjunto descrito en el párrafo anterior, siendo la válvula indicada bajo el n° 34 de sus dibujos.The basic structure of gas springs is known. All of them have a common assembly, formed by an external housing, a valve at one end, and a mobile device capable of carrying out the movement as such a spring consisting of a stem that has a part inside the chamber and a part outside it, so that the pressure on the outside determines a reaction effect on the inside so that it produces the desired return effect. EP 0490386 A2 per inert gas cylinder, responds to the assembly described in the previous paragraph, the valve being indicated under No. 34 of its drawings.
ES 2017166 A2 por muelle a gas nitrógeno, está formado igualmente por un conjunto también similar al anteriormente indicado; la válvula de carga viene indicada por el n° 9 de su dibujo. Posee el cilindro una doble cámara comunicada por orificios de pequeño diámetro.ES 2017166 A2 by nitrogen gas spring, it is also formed by a set also similar to the one indicated above; The loading valve is indicated by No. 9 of your drawing. The cylinder has a double chamber connected by small diameter holes.
ES 2026348 por resorte de gas de altas prestaciones, presenta diferencias estructurales con respecto a los dos anteriormente citados, y coincide esencialmente en cuanto al contenido antes citado como común; la válvula de carga viene representada en la figura bajo el n° 27.ES 2026348 by high performance gas spring, presents structural differences with respect to the two mentioned above, and essentially coincides with the aforementioned content as common; The loading valve is represented in the figure under No. 27.
De estas características, y dotados de válvulas de carga también podemos citar los US 542156 por muelle de gas autoblocante con válvula de paso que responde a la temperatura, DE4009034 por resorte de gas que puede ajustarse en longitud, DE 3931850 por muelle de gas, ó DE 3818811 por resorte de gas con una serie de cámaras de compresión dispuestas una tras otra.Of these characteristics, and equipped with valves We can also mention the US 542156 for a self-locking gas spring with a temperature-controlled valve, DE4009034 for a gas spring that can be adjusted in length, DE 3931850 for a gas spring, or DE 3818811 for a gas spring with a series of compression chambers arranged one after another.
La presente invención tiene por objeto un muelle de gas sin válvula y aparato para su presurizado. Es una constante en los antecedentes citados, la presencia de la válvula. La válvula no produce ningún efecto mientras el muelle está cargado, y en el caso de los muelles de gran o mediano tamaño, tampoco es sustancial la modificación de estructura que exige la válvula. Sin embargo, en los muelles en los que el tamaño es muy pequeño, el incremento de la longitud por la presencia de la válvula, determina una dificultad de difícil solución, pues pasa por la necesidad de inventar el presente aparato para su carga, y modificar absolutamente todo el proceso de fabricación de los conjuntos correspondientes. Por tanto, en la exposición siguiente vamos a apreciar por una parte la ventaja que determina la inexistencia de válvula, que no sólo abarca lo citado, si que además la válvula, como toda pieza susceptible de retener un gas, también está sujeta a averías -incluso en el proceso de fabricación- y por ello es posible que lo deje escapar, aumentando el riesgo de pérdida de presión que ya de por sí las propias juntas poseen por el uso. El aparato para su presurizado, es imprescindible pues, ya que es inherente al conjunto que mediante esta patente se solicita, ya que la única forma de obtener una carga de gasThe present invention aims at a gas spring without valve and apparatus for pressurizing. It is a constant in the aforementioned background, the presence of the valve. The valve has no effect while the spring is loaded, and in the case of large or medium size springs, the structure modification required by the valve is also not substantial. However, in the springs in which the size is very small, the increase in length due to the presence of the valve, determines a difficulty of difficult solution, because it goes through the need to invent the present apparatus for loading, and modify absolutely the entire manufacturing process of the corresponding assemblies. Therefore, in the following exhibition we will appreciate on the one hand the advantage that determines the non-existence of the valve, which not only covers the aforementioned, but also that the valve, like any piece capable of retaining a gas, is also subject to breakdowns - even in the manufacturing process - and therefore it is possible to let it escape, increasing the risk of loss of pressure that the joints themselves already possess for use. The apparatus for pressurizing is therefore essential, since it is inherent in the set that is requested by this patent, since the only way to obtain a gas charge
HOJA DE SUSTITUCIÓN (REGLA 20) nitrógeno en una cámara sin válvula es precisamente que el ambiente en el que está dicha cámara tenga la presión necesaria, lo cual no está exento de problemas cuando se habla de una presión de 150 barias o superiores. Con objeto de hacer mas clara la explicación que va a seguir, se acompaña diez hojas de dibujos que en diez figuras representan la esencia de la presente invención.SUBSTITUTE SHEET (RULE 20) nitrogen in a chamber without valve is precisely that the environment in which said chamber is to have the necessary pressure, which is not without problems when l had a pressure of 150 bar or higher. In order to make clearer the explanation that will follow, ten sheets of drawings are attached which in ten figures represent the essence of the present invention.
La figura 1 muestra una vista en sección del muelle y externamente a éste, del aparato de presurizado en una posición inicial .Figure 1 shows a sectional view of the spring and externally to it, of the pressurizing apparatus in an initial position.
La figura 2 muestra una vista en la misma sección, en posición de carga.Figure 2 shows a view in the same section, in loading position.
La figura 3 muestra una vista en la misma sección en posición de cargado, sin liberar el anillo de cierre .Figure 3 shows a view in the same section in the loaded position, without releasing the closing ring.
La figura 4 muestra la vista de la figura 3 habiendo liberado por expansión en anillo de cierre.Figure 4 shows the view of Figure 3 having been released by expansion in the closing ring.
La figura 5 muestra la posición en que puede iniciarse la retracción del conjunto de carga una vez cerrado el muelle.Figure 5 shows the position in which the retraction of the load assembly can be initiated once the spring is closed.
La figura 6 muestra el muelle ya cargado, dispuesto a ser extraído del conjunto de carga.Figure 6 shows the spring already loaded, ready to be removed from the load assembly.
Las figuras 7 a 10 muestran secuencias de la cabeza del muelle concordantes la figura 7 con la 1, la figura 8 con la 2, la figura 9 con la 4, y la figura 10, con la 6.Figures 7 to 10 show sequences of the spring head in accordance with Figure 7 with 1, Figure 8 with 2, Figure 9 with 4, and Figure 10 with 6.
En dichas figuras se representa indicado por 1 el soporte posicionador de un extremo del muelle, con 2 el émbolo empujador posicionador dispuesto internamente en el soporte 1, con 3 el soporte del cuerpo del muelle, con 4 el elemento de presión del soporte 3, con 5 el pasador, con 6 los resortes metálicos abiertos del posicionador, con 7 el cuerpo del muelle, con 8 la cámara del muelle, con 9 el vastago del muelle, con 10 la cabeza del vastago 9, con 11 las juntas del vastago, con 12 el bastidor de sujeción del soporte posicionador 1, con 13 el bastidor de sujeción del soporte 2, con 14 la cámara del aparato de carga, con 15 el vastago del émbolo empujador, con 16 las juntas del émbolo empujador, con 17 se indica la junta entre el soporte 1 y el soporte 3, con 18 se indica el rebaje, anular de la boca interior del cuerpo del muelle 7, con 19 se muestra el cuerpo anular de retención de presión, con 20 se muestra los alojamientos para juntas interiores 11 del cuerpo 19 con el vastago 9, con 21 se muestra el reborde anular externo y junta del cuerpo 19, con 22 se indica el chavetero, con 23 se muestra el retenedor del anillo metálico, con 24 se indica el ángulo en que apoya el borde externo de la boca del cuerpo del muelle, con 25 se indica el reborde anular centrador, con 26 se muestra el anillo metálico, con 27 se indica el borde externo de la boca del cuerpo del muelle, con 28 se muestra el rascador que se inserta terminado el proceso de fabricación evitando la entrada de suciedades, con 29 se muestra el orificio de entrada de gas, con 30 se indica el anillo tórico, con 31 se indica el soporte antiextrusión del anillo tórico 30, con 32 se muestra el rebaje en el cuerpo 19 que retiene el anillo metálico 26. Explicación de un modo de realización. De acuerdo con las figuras cuya explicación de sus partes se halla en el párrafo anterior, resulta evidente que para cargar un muelle de gas como el que nos ocupa, es necesario que el ambiente previo al momento en que se embuta el conjunto del cuerpo anular de retención 19 conteniendo el vastago 9, en la cámara 8 del muelle, tenga la presión adecuada de acuerdo con la requerida. Es también un hecho conocido en éstas técnicas que la atmósfera que se halle en el interior de un muelle de estas características ha de ser inerte, o sea no contener oxígeno que con presión y combinado con radicales hidrocarburos contenidos en el aceite de la lubricación puedan determinar una oxidación brusca y la correspondiente explosión.In these figures, the positional support of one end of the spring is shown indicated by 1, with 2 the é b olo the positioner pusher arranged internally in the support 1, with 3 the support of the spring body, with 4 the pressure element of the support 3, with 5 the pin, with 6 the open metal springs of the positioner, with 7 the body of the spring, with 8 the spring chamber, with 9 the spring rod, with 10 the rod head 9, with 11 the rod joints, with 12 the support frame of the positioning bracket 1, with 13 the support frame of the support 2, with 14 the chamber of the loading apparatus, with 15 the rod of the pusher piston, with 16 the joints of the pusher piston, with 17 the joint between the support 1 and the support 3 is indicated, with 18 the recess is indicated, annular from the inner mouth of the spring body 7, with 19 the annular pressure retaining body is shown, with 20 the housings for inner joints 11 of the body 19 with the rod 9 are shown, with 21 the outer annular flange and gasket are shown of body 19, with 22 the chavet is indicated ero, with 23 the metal ring retainer is shown, with 24 the angle at which the outer edge of the mouth of the spring body is indicated, with 25 the centering annular flange is indicated, with 26 the metal ring is shown, with 27 the outer edge of the mouth of the body of the spring is indicated, with 28 the scraper that is inserted finished the manufacturing process is shown avoiding the entry of dirt, with 29 the gas inlet hole is shown, with 30 the O-ring, with 31 the anti-extrusion support of the O-ring 30 is indicated, with 32 the recess in the body 19 that retains the metal ring 26 is shown. Explanation of an embodiment. According to the figures whose explanation of their parts is in the previous paragraph, it is evident that to load a gas spring like the one in question, it is necessary that the environment prior to the moment in which the whole of the annular body of retention 19 containing the rod 9, in the chamber 8 of the spring, has the appropriate pressure according to that required. It is also a known fact in these techniques that the atmosphere inside a spring of these characteristics must be inert, that is, it does not contain oxygen that, with pressure and combined with hydrocarbon radicals contained in the lubrication oil, can determine an abrupt oxidation and the corresponding explosion.
De acuerdo con ello, el aparato que lleva a cabo la carga del muelle, es en principio inseparable del propio muelle, como se aprecia a continuación, aunque una vez elaborado mantienen ambos características totalmente independientes .Accordingly, the apparatus that carries out the loading of the dock is in principle inseparable from the dock itself, as can be seen below, although once they have been developed they maintain both completely independent characteristics.
Así, el aparato está formado por un bastidor fijo y un bastidor que puede ser amovible, indicados por 12 y 13. Es indiferente cual de ellos actúe como fijo, incluso ambos podrían serlo. El bastidor señalado con 13 posee un elemento de presión 4 que sujeta el soporte 3 del cuerpo del muelle, que es ciego por el lado opuesto a la posición del cuerpo del muelle 7, y lo ajusta sobre el soporte 1 con respecto al bastidor 12 con cierre hermético a través de la junta 17. Previamente a este ajuste, en el interior de ambos soportes debe contenerse el cuerpo del muelle 7 dentro del indicado por 3 y el conjunto del vastago 9 y cuerpo anular de retención 19 dentro del señalado por 1. Además se habrá dispuesto el retenedor 23 del anillo metálico 26.Thus, the apparatus is formed by a fixed frame and a frame that can be removable, indicated by 12 and 13. It is indifferent which of them acts as fixed, even both could be. The frame indicated with 13 has a pressure element 4 that holds the support 3 of the spring body, which is blind on the side opposite to the position of the spring body 7, and adjusts it on the support 1 with respect to the frame 12 with airtight seal through the seal 17. Prior to this adjustment, inside the two supports the spring body 7 must be contained within that indicated by 3 and the rod assembly 9 and annular body d e retention 19 within that indicated by 1. In addition, the retainer 23 of the metal ring 26 will be provided.
En la posición de carga, se procede inicialmente a succionar si es necesario y sustituir el ambiente interior por gas inerte, por ejemplo nitrógeno, y darle presión a éste de modo que sea la adecuada para el esfuerzo que en adelante deberá llevar a cabo el muelle.In the loading position, it is initially necessary to suck if necessary and replace the indoor environment with inert gas, for example nitrogen, and give pressure to it so that it is adequate for the effort that the spring will have to carry out .
Esta operación se lleva a cabo a través del orificio 29, naturalmente vinculado a válvulas y manguitos adecuados para las presiones de que se habla.This operation is carried out through the hole 29, naturally linked to valves and sleeves suitable for the pressures mentioned.
En estas condiciones, se inicia el esfuerzo presionador por el vastago 15 del émbolo empujador posicionador 2, émbolo que es susceptible de desplazarse sin perder presión por la existencia de las juntas 16. En la figura 7 se aprecia que la atmósfera inerte es común en la cámara 14 y en la cámara 8 del muelle por hallarse comunicadas. Sin embargo, una vez ha iniciado la cabeza del vastago 10 la entrada y el borde anular 21 y el anillo tórico 30 y su soporte 31 han tomado contacto con las paredes interiores de la cámara 8, ambos ambientes quedan separados. El conjunto del vastago 9 y cuerpo anular de retención 19, debe fijarse en el interior del cuerpo 7. Para ello, el émbolo empujador posicionador 2, posee en torno a él, un retenedor del anillo metálico 23, vinculados ambos cuerpos por unos resortes metálicos abiertos 6. La presión ejercida por los resortes permite que el anillo metálico 26 no se expanda y se salga del alojamiento que se forma entre el émbolo empujador posicionador 2 y el retenedor 23. Cuando el conjunto del émbolo empujador posicionador 2 y retenedor 23, se desplaza hacia el cuerpo del muelle, lo hacen ambas partes solidariamente, sin variar sus posiciones relativas. Sin embargo, cuando el ángulo 24 del retenedor 23, toma contacto con el borde externo de la boca del cuerpo del muelle señalada con 27, los resortes comienzan a comprimirse, ya que al seguir ejerciéndose presión sobre el vastago 15, el émbolo empujador posicionador 2 continúa avanzando. En dicha posición, se produce por una parte la ubicación del centrador 25 en el interior de la boca de la cámara 8, y subsiguientemente, la liberación del anillo metálico 26 de la retención del centrador 25, que queda sin embargo, retenido por las paredes de la cámara 8. En esta posición, los resortes 6 siguen comprimiéndose ya que el retenedor 23 no puede avanzar más, y sin embargo el anillo llega a superar la posición de un rebaje anular interno 18 dispuesto en el interior de la cámara 8. En esta situación, al dejar de presionar en el vastago del émbolo empujador 15, el vastago 9 y su conjunto de retención, retroceden; sin embargo el anillo metálico se ha expandido en el rebaje anular 18 cuya forma es sustancialmente suave hacia el interior pero evidentemente brusca hacia el exterior, y se ha ubicado en el rebaje 32 del cuerpo 19, de modo que queda atrapado sin posibilidad de ser extraído entre estas dos piezas. El resultado, queda tal y como aparece en la figura 10, un muelle de gas sin válvula, que por ello posee unas características de precio con respecto a los que necesariamente vienen dotados de ella evidentemente favorables, y por tanto exento de las averías que seUnder these conditions, the pressing effort is initiated by the rod 15 of the positioning pusher piston 2, a piston that is capable of moving without losing pressure due to the existence of the seals 16. In Figure 7 it can be seen that the inert atmosphere is common in the chamber 14 and chamber 8 of the dock because they are communicated. However, once the head of the rod 10 has started the entrance and the annular edge 21 and the O-ring 30 and its support 31 have made contact with the inner walls of the chamber 8, both environments are separated. The assembly of the rod 9 and annular retaining body 19, must be fixed inside the body 7. For this purpose, the positioning pusher piston 2, has around it, a retainer of the metal ring 23, both bodies linked by metal springs open 6. The pressure exerted by the springs allows the metal ring 26 to not expand and exit the housing formed between the positioner pusher piston 2 and the retainer 23. When the pusher piston assembly positioner 2 and retainer 23, moves towards the body of the spring, both parts do it in solidarity, without changing their relative positions. However, when the angle 24 of the retainer 23 comes into contact with the outer edge of the mouth of the spring body indicated with 27, the springs begin to compress, since as pressure is continued on the rod 15, the positioning pusher piston 2 keep moving forward In said position, the location of the centering 25 inside the mouth of the chamber 8 occurs, and subsequently, the release of the metal ring 26 from the retention of the centering 25, which is, however, retained by the walls of the chamber 8. In this position, the springs 6 continue to be compressed since the retainer 23 cannot advance further, and yet the ring gets to exceed the position of an internal annular recess 18 disposed inside the chamber 8. In this situation, by stopping pressing on the piston rod 15, the rod 9 and its retaining assembly, recede; however, the metal ring has expanded in the annular recess 18 whose shape is substantially smooth inwardly but obviously abruptly outwardly, and has been located in the recess 32 of the body 19, so that it is trapped without the possibility of being removed Between these two pieces. The result is as shown in Figure 10, a gas spring without valve, which therefore has price characteristics with respect to those that are necessarily endowed with it obviously favorable, and therefore exempt from the breakdowns that are
HOJA DE SUSTITUCIÓN (REGLA 26) originan en las válvulas que son la causa del fallo de muchos de estos aparatos.SUBSTITUTE SHEET (RULE 26) originate in the valves that are the cause of the failure of many of these devices.
Es posible, de acuerdo con la explicación dada, que la posición del rebaje anular 18, así como la posición del anillo tórico 30 y su soporte antiextrusión 31, inviertan su posición, adentrándose mas el rebaje anular; ello no sería necesario en presiones limitadas, pero si se produce un muelle en el que se generen en el momento de la entrada grandes diferencias de presión con la cámara 14, podría ser necesaria ésta modificación.It is possible, according to the explanation given, that the position of the annular recess 18, as well as the position of the O-ring 30 and its anti-extrusion support 31, reverse its position, further penetrating the annular recess; this would not be necessary at limited pressures, but if a spring is produced in which large pressure differences with the chamber 14 are generated at the time of entry, this modification may be necessary.
Resulta obvio que cualquiera que sea la forma del émbolo y vastago, como de las cámaras, se entiende comprendida en la presente invención, así como modificaciones en la forma de los elementos que componen el muelle como el aparato para el presurizado. También es evidente que pueden utilizarse medios para la estabilización de la presión interior, del tipo de los que comprenden un vastago hueco, cámaras comunicantes, etc.It is obvious that whatever the shape of the piston and rod, as of the chambers, is understood to be included in the present invention, as well as modifications in the form of the elements that make up the spring as the pressurizing apparatus. It is also evident that means can be used for the stabilization of the internal pressure, such as those comprising a hollow rod, communicating chambers, etc.
Es de aplicación industrial en la fabricación de muelles de gas sin válvula. It is of industrial application in the manufacture of gas springs without valves.

Claims

R E I V I N D I C A C I O N E S 1.- Muelle de gas sin válvula, y aparato para su presurizado, del tipo que comprende una cámara que se halla presurizada con un gas inerte y un vastago susceptible de desplazarse por presión hacia el interior y por reacción hacia el exterior, caracterizado por que comprende un cuerpo (7) constituido por un cilindro que posee una cámara interior (8) el cual está exento de válvula de carga, siendo dicho cilindro (7) complementario y susceptible de ser estanco con respecto a un cuerpo anular de retención (19) , que en su interior es susceptible de alojar un vastago (9) igualmente estanco con respecto a éste cuerpo anular (19) .CLAIMS 1.- Gas spring without valve, and apparatus for pressurizing, of the type comprising a chamber that is pressurized with an inert gas and a rod capable of moving by pressure inwards and by reaction to the outside, characterized by comprising a body (7) constituted by a cylinder that has an inner chamber (8) which is free of a loading valve, said cylinder (7) being complementary and capable of being sealed with respect to an annular retention body (19 ), that inside it is capable of housing a rod (9) equally tight with respect to this annular body (19).
2.- Aparato para presurizado, caracterizado por que está formado por un conjunto de dos partes formando un bloque estanco presurizado, que comprende un soporte (3) y un soporte (1) ; el soporte (3) está formado por un cuerpo ciego, interiormente cilindrico, susceptible de alojar un cuerpo (7) del muelle, siendo capaz de ser presionado por un elemento de presión (4) y con respecto a un bastidor (13) fijo ó amovible; el soporte (1) está formado por un cuerpo interiormente cilindrico, susceptible de alojar un posicionador del vastago y un retenedor (23) de anillo metálico (26), hallándose el émbolo empujador posicionador2.- Pressurized apparatus, characterized in that it is formed by a set of two parts forming a pressurized sealed block, comprising a support (3) and a support (1); The support (3) is formed by a blind body, internally cylindrical, capable of housing a body (7) of the spring, being able to be pressed by a pressure element (4) and with respect to a fixed frame (13) or removable; the support (1) is formed by an internally cylindrical body, capable of accommodating a rod positioner and a metal ring retainer (23) (26), the positioning pusher piston being
(2) dotado de un cierre de juntas (16) con respecto al soporte (1) propiamente dicho, y que posee una prolongación hacia el exterior a través de un bastidor (12) fijo ó amovible, en el que se apoya, siendo la dicha prolongación formada por un vastago (15) susceptible de ser presionado por una fuerza exterior. El émbolo empujador posicionador (2) se halla vinculado al retenedor (23) del anillo metálico(2) provided with a seal closure (16) with respect to the support (1) proper, and which has an extension towards the outside through a fixed or removable frame (12), on which it rests, being the said extension formed by a rod (15) capable of being pressed by an external force. The plunger pusher positioner (2) is linked to the retainer (23) of the metal ring
(26) mediante unos resortes abiertos. Posee un orificio (29) para la presurización.(26) through open springs. It has a hole (29) for pressurization.
3.- Aparato, según la reivindicación 2 caracterizado por que el émbolo empujador posicionador (2) del vastago y el retenedor del anillo metálico se hallan vinculados mediante unos resortes metálicos abiertos (6) susceptibles de ser comprimidos y con ello de variar la posición relativa entre ambos cuerpos, posicionador (2) y retenedor (23) .3. Apparatus, according to claim 2, characterized in that the positioning piston (2) of the rod and the retainer of the metal ring are connected by means of open metal springs (6) capable of being compressed and thereby varying the relative position between both bodies, positioner (2) and retainer (23).
4.- Aparato, según la reivindicaciones 2 y 3 caracterizado por que el retenedor (23) del anillo metálico4. Apparatus according to claims 2 and 3 characterized in that the retainer (23) of the metal ring
(26) posee un ángulo (24) susceptible de encastrarse en el borde externo de la boca (27) del cuerpo del muelle, y cuya parte (25) conforma un anillo igualmente capaz de insertarse con efecto de centrador con respecto al cuerpo del muelle(26) has an angle (24) that can be embedded in the outer edge of the mouth (27) of the spring body, and whose part (25) forms a ring equally capable of being inserted with a centering effect with respect to the spring body
(7)(7)
5.- Muelle, según la reivindicación 1 caracterizado por que el cuerpo cilindrico del muelle (7) , posee interiormente un rebaje anular (18) que presenta una forma que es sustancialmente suave hacia el interior pero evidentemente brusca hacia el exterior, determinando un alojamiento en el que se enclava el anillo metálico (26) .5. Spring according to claim 1 characterized in that the cylindrical body of the spring (7) internally has an annular recess (18) that has a shape that is substantially smooth inwardly but obviously abruptly outward, determining a housing in which the metal ring (26) is interlocked.
6.- Muelle, según la reivindicación 1 caracterizado por que el cuerpo anular de retención (19) posee interiormente unos alojamientos (20) para unas juntas6. Spring according to claim 1 characterized in that the annular retaining body (19) internally has housings (20) for joints
(11) susceptibles de ajustar anularmente en el cuerpo del vastago (9) .(11) susceptible to annular adjustment in the body of the rod (9).
7.- Muelle, según las reivindicaciones 1 y 6, caracterizado por que el cuerpo anular de retención (19) posee exteriormente un borde anular externo (21) susceptible de constituir junta de estanquidad, además de ser su perímetro externo totalmente coincidente y estanco con respecto al interior del cuerpo del muelle (7) , y posee igualmente un anillo tórico (30) y un soporte antiextrusión (31) del anillo tórico constitutivo también de junta de estanquidad .7. Spring according to claims 1 and 6, characterized in that the annular retaining body (19) externally has an outer annular edge (21) capable of constituting a seal, in addition to being its external perimeter completely coincident and tight with respect to the interior of the spring body (7), and It also has an O-ring (30) and an anti-extrusion support (31) of the O-ring which also constitutes a sealing gasket.
8.- Muelle, según las reivindicaciones 1, 5 y 6, caracterizado por que el cuerpo anular de retención (19) , posee un rebaje (32) en su falda, susceptible de retener y bloσuear el anillo metálico (26) con respecto al rebaje anular ( 18 ) .8. Spring according to claims 1, 5 and 6, characterized in that the annular retaining body (19) has a recess (32) in its skirt, capable of retaining and blocking the metal ring (26) with respect to the annular recess (18).
9.- Muelle, según las reivindicaciones 1 y 5 a 8, caracterizado por que en presiones de carga muy diferenciadas entre la cámara (14) y la cámara (8) del cuerpo del muelle (7) , la posición del rebaje anular (18) se halla más adentrada que las juntas constituidas por el anillo tórico (30) y su soporte antiextrusión (31) que quedan en posición mas hacia afuera. 9. Spring according to claims 1 and 5 to 8, characterized in that at very different load pressures between the chamber (14) and the chamber (8) of the spring body (7), the position of the annular recess (18 ) is deeper than the seals constituted by the O-ring (30) and its anti-extrusion support (31) that are in a more outward position.
PCT/ES1996/000240 1996-12-17 1996-12-17 Valve-free gas spring, and apparatus for pressurizing such spring WO1998027361A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/ES1996/000240 WO1998027361A1 (en) 1996-12-17 1996-12-17 Valve-free gas spring, and apparatus for pressurizing such spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES1996/000240 WO1998027361A1 (en) 1996-12-17 1996-12-17 Valve-free gas spring, and apparatus for pressurizing such spring

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001075327A1 (en) * 2000-03-31 2001-10-11 Pascal Kabushiki Kaisha Gas spring and method of charging gas into the gas spring
CN102019547A (en) * 2010-11-10 2011-04-20 上海诺玛液压系统有限公司 Tool used for press fitting of reverse mechanism on load sensitive proportional multiway valve
CN101745799B (en) * 2009-12-18 2011-06-01 安徽江淮汽车股份有限公司 Pressing and mounting device for pressing and mounting thin-wall sleeve
CN106624742A (en) * 2017-02-17 2017-05-10 厦门精合电气自动化有限公司 Device for realizing reference self-adaptive function

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DE1951656A1 (en) * 1969-10-14 1971-04-29 Vogel Ignaz Kg Filling and actuating valve for pneumatic (hydropneumatic) springs
GB2070729A (en) * 1980-02-20 1981-09-09 Avm Corp Gas springs and a method and apparatus for their manufacture
US4457196A (en) * 1980-12-17 1984-07-03 Houdaille Industries, Inc. Punch press assembly including a preloaded encapsulted spring
DE3900690A1 (en) * 1989-01-12 1990-07-19 Bauer Fritz & Soehne Ohg Method for introducing pressurised gas into a pneumatic spring and a pneumatic spring suitable for this purpose
ES2017166A6 (en) * 1989-03-30 1991-01-01 Orive Arana Juan Cruz Nitrogen-gas spring
ES2026348A6 (en) * 1989-10-19 1992-04-16 Quiri & Cie Usines Gas compression device having isolated compression and lubrication chambers
US5524871A (en) * 1993-11-12 1996-06-11 Fichtel & Sachs Ag Method of making a shock absorber and a shock absorber made by the method

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Publication number Priority date Publication date Assignee Title
DE1951656A1 (en) * 1969-10-14 1971-04-29 Vogel Ignaz Kg Filling and actuating valve for pneumatic (hydropneumatic) springs
GB2070729A (en) * 1980-02-20 1981-09-09 Avm Corp Gas springs and a method and apparatus for their manufacture
US4457196A (en) * 1980-12-17 1984-07-03 Houdaille Industries, Inc. Punch press assembly including a preloaded encapsulted spring
DE3900690A1 (en) * 1989-01-12 1990-07-19 Bauer Fritz & Soehne Ohg Method for introducing pressurised gas into a pneumatic spring and a pneumatic spring suitable for this purpose
ES2017166A6 (en) * 1989-03-30 1991-01-01 Orive Arana Juan Cruz Nitrogen-gas spring
ES2026348A6 (en) * 1989-10-19 1992-04-16 Quiri & Cie Usines Gas compression device having isolated compression and lubrication chambers
US5524871A (en) * 1993-11-12 1996-06-11 Fichtel & Sachs Ag Method of making a shock absorber and a shock absorber made by the method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001075327A1 (en) * 2000-03-31 2001-10-11 Pascal Kabushiki Kaisha Gas spring and method of charging gas into the gas spring
US6663088B2 (en) * 2000-03-31 2003-12-16 Pascal Engineering Corporation Gas spring and method of charging gas into the gas spring
CN101745799B (en) * 2009-12-18 2011-06-01 安徽江淮汽车股份有限公司 Pressing and mounting device for pressing and mounting thin-wall sleeve
CN102019547A (en) * 2010-11-10 2011-04-20 上海诺玛液压系统有限公司 Tool used for press fitting of reverse mechanism on load sensitive proportional multiway valve
CN102019547B (en) * 2010-11-10 2012-09-05 上海诺玛液压系统有限公司 Tool used for press fitting of reverse mechanism on load sensitive proportional multiway valve
CN106624742A (en) * 2017-02-17 2017-05-10 厦门精合电气自动化有限公司 Device for realizing reference self-adaptive function

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