WO2015040246A1 - Stop gas spring - Google Patents

Stop gas spring Download PDF

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Publication number
WO2015040246A1
WO2015040246A1 PCT/ES2013/070647 ES2013070647W WO2015040246A1 WO 2015040246 A1 WO2015040246 A1 WO 2015040246A1 ES 2013070647 W ES2013070647 W ES 2013070647W WO 2015040246 A1 WO2015040246 A1 WO 2015040246A1
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WO
WIPO (PCT)
Prior art keywords
piston
chamber
cylindrical cavity
gas
gas spring
Prior art date
Application number
PCT/ES2013/070647
Other languages
Spanish (es)
French (fr)
Inventor
Oscar ALEJOS PÉREZ
Edorta RAMOS DÍAZ DE GUEREÑU
Original Assignee
Azol-Gas, S.L.
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 Azol-Gas, S.L. filed Critical Azol-Gas, S.L.
Priority to PCT/ES2013/070647 priority Critical patent/WO2015040246A1/en
Publication of WO2015040246A1 publication Critical patent/WO2015040246A1/en

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Classifications

    • 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
    • F16F9/0227—Telescopic characterised by the piston construction
    • 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

Definitions

  • the present invention can be included in the technical field of stop gas springs. Specifically, the proposed gas spring prevents the rebound effect. BACKGROUND OF THE INVENTION
  • the gas springs are applied in sheet forming processes, limiting the effort exerted on it and allowing a displacement of the forming tools with a small increase in force.
  • the external force that compresses the gas spring acts on the one hand, and on the other hand the compressed gas force itself, opposing the first.
  • the piston In order to stop the rod in the compressed position of the gas spring (with the rod in its limit position), it is necessary that the piston has gaskets that allow a separation of the gas volumes above and below of said plunger. That is, it is necessary that there be gaskets that separate the upper chamber from the lower chamber of the cylinder.
  • the nature of the gas when the external stress ceases, it goes from the state of having the same gas pressure in both chambers, to equalize the forces on both sides of the piston.
  • the lower part of the piston receives the thrust of the gas that is in the lower chamber on a section that is the complete disk of the piston. Said surface corresponds to the internal emptying of the cylinder.
  • the section on which the gas is pushed is a ring whose outer diameter coincides with the inner emptying of the cylinder, but the inner diameter is the diameter of the rod.
  • the gas spring rod begins to rise.
  • the upper and lower chambers are isolated, while the rod moves upward, the upper chamber pressure increases and the lower chamber expands and its pressure decreases.
  • the present invention proposes a stop gas spring that avoids the rebound effect described in the previous section.
  • the gas spring comprises a cylinder inside which a first piston is displaced that divides the interior of the cylinder into an upper chamber and a lower chamber.
  • the two chambers are filled with gas and are isolated in positions close to the end of the work run.
  • the key of the present invention is to modify the volume of the lower chamber to increase it and thus reduce the pressure of the gas contained therein, which is the cause of the said rebound effect.
  • the stop gas spring comprises a second cylindrical cavity that is separated from the first cylindrical cavity by an intermediate base.
  • the intermediate base there is at least one through cavity that communicates them.
  • a third piston is displaced having one of its ends in contact with the lower chamber and another of its ends is connected or in contact with a second piston.
  • the end of the third plunger is attached to the second plunger in solidarity.
  • the second piston has the possibility of moving along the second cylindrical cavity, separating it into a first chamber and a second chamber.
  • the displacement of the second piston is carried out by introducing or extracting a gas, preferably pneumatic air, from the second cylindrical cavity through a connecting element that is preferably located in the second chamber.
  • a gas preferably pneumatic air
  • the second piston moves upwards and the first cylindrical cavity has the same volume as in the prior art cylinders.
  • the second chamber is filled with air (which has been introduced into it through the connecting element), and the second piston and the third piston are in a position such that the lower chamber has lower volume (at that time it has the same volume as in the gas springs of the prior art).
  • the first piston moves, but the second piston and the third piston remain in their highest position, causing the volume of the lower chamber to remain the same (still the same as in the springs of state of the art gas).
  • the gas pressure in the lower chamber is not capable of overcoming the force that the air in the second chamber is exerting on the second piston, but once the air in the second chamber has been expelled, it can move said second plunger. Moving it increases the volume of the lower chamber, reducing its pressure.
  • the gases in the lower chamber tend to occupy as much space as possible, which in this case is that of the lower chamber, plus the space released in the through cavities.
  • the pressure in it decreases.
  • the force exerted by the gas in the upper chamber on the upper part of the first piston is equal to or somewhat greater than the force exerted by the new pressure in the lower chamber on the lower part of the first piston, and therefore there is no net upward force about said plunger.
  • Figure 1.- Shows a view of a gas spring of the prior art.
  • Figure 2 - Shows a view of the stop gas spring of the invention.
  • Figure 3. Shows a view of the gas spring in a position in which gas has been introduced into the third chamber and the volume of the first cylindrical cavity has not been modified.
  • Figure 4.- Shows a view in which gas has been extracted from the second cylindrical cavity by means of the connecting element and the volume of the lower chamber has been increased.
  • the stop gas spring of the present invention is of the type comprising a cylindrical body with at least a first cylindrical cavity (2) inside which at least one first piston (3) moves.
  • said first piston (3) divides the first cylindrical cavity into an upper chamber (10) and a lower chamber (1 1).
  • the problem of gas springs of the prior art is that they suffer a rebound effect when the piston is in the end-of-travel position and stops exercising external force
  • the proposed configuration allows to increase the volume of the lower chamber (1 1) of the first cylindrical cavity (2).
  • the stop gas spring of the invention is shown in Figure 2. With respect to the prior art springs, it additionally comprises a second cylindrical cavity (4), separated from the first cylindrical cavity (2) by means of an intermediate base ( 5). In said intermediate base (5) there is at least one through cavity (6) that communicates the first cylindrical cavity (2) and the second cylindrical cavity (4).
  • a second piston (7) is displaced which in a preferred embodiment of the invention divides the second cylindrical cavity (4) into a first chamber (12) and a second chamber (13). It also comprises at least a third piston (8) that has an end connected or in contact with the second piston (7) and that travels inside the through cavity (6) of the intermediate base (5).
  • the second cylindrical cavity (4) there is at least one connecting element (9) designed to allow the introduction and extraction of a gas, preferably pneumatic air, in said second cylindrical cavity (4).
  • said connecting element (9) is arranged in the second chamber (13).
  • the through cavity (6) communicates the lower chamber (1 1) with the second cylindrical cavity (4).
  • the through cavity (6) communicates the cylindrical cavity (2) with the pnmera chamber (12).
  • the through cavity (6) communicates the lower chamber (1 1) with the pnmera chamber (12).
  • the second piston (7) and the third piston (8) can form a single piece.
  • the stop gas spring comprises two third pistons (8).
  • a gas preferably pneumatic air, is introduced through the connecting element (9) to fill the second chamber (13).
  • the second piston (7) is in contact with the intermediate base (5) and the first cylindrical cavity (2) has the same appearance as in the gas springs of the state of the technique.
  • the volume of the lower chamber is increased (1 1).
  • the gas from the second chamber (13) pneumatic air
  • the connecting element (9) due to the pressure existing in the lower chamber (1 1), it displaces the third pistons (8) and the second plunger (7) down.
  • the gas in the lower chamber (1 1) now occupies the entire volume of said lower chamber and additionally the volume that has been left free in the through cavities, as seen in Figure 4. Thus, its pressure decreases until the forces exerted by the gas on both sides of the first piston (3) are equalized. Since both forces are approximately equal, they are in equilibrium and the rebound effect of the prior art springs does not occur.

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

Abstract

The invention relates to a stop gas spring which avoids the rebound effect, increasing the volume of one of the chambers containing the gas. It comprises a hollow cylinder with a first cylindrical cavity (2) in which a first piston (3) moves, generating an upper chamber (10) and a lower chamber (11), and a second cylindrical cavity (4) in which a second piston (7) moves, the two cavities being separated by an intermediate base (5). The second piston (7) is connected to, or in contact with, third pistons (8) arranged in the intermediate base (5). The invention also comprises a connection element (9) for allowing the introduction and extraction of a gas into or from the second cylindrical cavity (4) in order to move the second piston (7) which moves the third pistons (8), thereby varying the volume of the lower chamber (11).

Description

RESORTE DE GAS DE PARADA  STOP GAS SPRING
D E S C R I P C I Ó N OBJETO DE LA INVENCIÓN D E S C R I P C I O N OBJECT OF THE INVENTION
La presente invención se puede incluir en el campo técnico de los resortes de gas de parada. Concretamente el resorte de gas propuesto evita el efecto rebote. ANTECEDENTES DE LA INVENCIÓN The present invention can be included in the technical field of stop gas springs. Specifically, the proposed gas spring prevents the rebound effect. BACKGROUND OF THE INVENTION
Los resortes de gas se aplican en procesos de conformado de chapa, limitando el esfuerzo que se ejerce sobre la misma y posibilitando que pueda haber un desplazamiento de los útiles de conformado con un pequeño incremento de fuerza. The gas springs are applied in sheet forming processes, limiting the effort exerted on it and allowing a displacement of the forming tools with a small increase in force.
La posibilidad de poder controlar el movimiento de los resortes de gas, de forma que se puedan detener al final de la carrera del vástago permite que se puedan llevar a cabo secuencias del proceso de estampado que de otra forma deformarían la pieza a estampar. The possibility of being able to control the movement of the gas springs, so that they can be stopped at the end of the rod stroke allows sequences of the stamping process to be carried out that would otherwise deform the piece to be stamped.
Durante la compresión del gas que hay en el interior del cilindro actúa por un lado la fuerza externa que comprime el resorte de gas, y por otro lado la propia fuerza que ejerce el gas comprimido, oponiéndose a la primera. During the compression of the gas inside the cylinder, the external force that compresses the gas spring acts on the one hand, and on the other hand the compressed gas force itself, opposing the first.
Para poder realizar la parada del vástago en la posición comprimida del resorte de gas (con el vástago en su posición de final de carrera), es necesario que en el émbolo haya juntas que permitan una separación de los volúmenes de gas por encima y por debajo de dicho émbolo. Es decir, es necesario que haya juntas que separen la cámara superior de la cámara inferior del cilindro. Sin embargo, por la propia naturaleza del gas, cuando cesa el esfuerzo exterior se pasa del estado de tener la misma presión de gas en ambas cámaras, a igualarse las fuerzas en ambos lados del émbolo. In order to stop the rod in the compressed position of the gas spring (with the rod in its limit position), it is necessary that the piston has gaskets that allow a separation of the gas volumes above and below of said plunger. That is, it is necessary that there be gaskets that separate the upper chamber from the lower chamber of the cylinder. However, due to the nature of the gas, when the external stress ceases, it goes from the state of having the same gas pressure in both chambers, to equalize the forces on both sides of the piston.
La parte inferior del émbolo recibe el empuje del gas que está en la cámara inferior sobre una sección que es el disco completo del émbolo. Dicha superficie se corresponde con el vaciado interior del cilindro. Sin embargo, en la parte superior del émbolo, es decir desde la cámara superior, la sección sobre la que empuja el gas es un anillo cuyo diámetro exterior coincide con el vaciado interior del cilindro, pero el diámetro interior es el diámetro del vástago. The lower part of the piston receives the thrust of the gas that is in the lower chamber on a section that is the complete disk of the piston. Said surface corresponds to the internal emptying of the cylinder. However, in the upper part of the plunger, that is to say from the upper chamber, the section on which the gas is pushed is a ring whose outer diameter coincides with the inner emptying of the cylinder, but the inner diameter is the diameter of the rod.
En definitiva, en el instante en que cesa la fuerza exterior existe una fuerza neta ascendente. Esto es debido a que en ambos lados del émbolo la presión del gas es la misma pero la sección del émbolo sobre la que ejerce presión el gas de la cámara inferior es mayor que la sección del émbolo sobre la que ejerce presión el gas de la cámara superior. In short, at the moment when the external force ceases there is a net ascending force. This is because on both sides of the plunger the gas pressure is the same but the section of the plunger on which the gas in the lower chamber is pressing is larger than the section of the plunger on which the gas in the chamber is pressing. higher.
A causa de dicha fuerza neta ascendente, el vástago del resorte de gas empieza a ascender. Al estar aisladas las cámaras superior e inferior, mientras el vástago se mueve en dirección ascendente, la presión de la cámara superior aumenta y la cámara inferior se expande y disminuye su presión. Because of said net rising force, the gas spring rod begins to rise. As the upper and lower chambers are isolated, while the rod moves upward, the upper chamber pressure increases and the lower chamber expands and its pressure decreases.
Así pues, el equilibrio se alcanza unos milímetros por encima de la posición final, cuando el producto de la sección del émbolo en la cámara superior por la nueva presión que hay en dicha cámara (que es mayor), es igual al producto de la sección del émbolo en la cámara inferior por la nueva presión en dicha cámara (que es menor). Thus, the equilibrium is reached a few millimeters above the final position, when the product of the piston section in the upper chamber by the new pressure in said chamber (which is greater), is equal to the product of the section of the piston in the lower chamber by the new pressure in said chamber (which is smaller).
DESCRIPCIÓN DE LA INVENCIÓN La presente invención propone un resorte de gas de parada que evita el efecto rebote descrito en el apartado anterior. El resorte de gas comprende un cilindro en el interior del que se desplaza un primer émbolo que divide el interior del cilindro en una cámara superior y una cámara inferior. Las dos cámaras están rellenas de gas y están aisladas en posiciones próximas al final de la carrera de trabajo. La clave de la presente invención es modificar el volumen de la cámara inferior para aumentarlo y disminuir así la presión del gas contenido en ella, que es la causa de que se produzca el mencionado efecto rebote. DESCRIPTION OF THE INVENTION The present invention proposes a stop gas spring that avoids the rebound effect described in the previous section. The gas spring comprises a cylinder inside which a first piston is displaced that divides the interior of the cylinder into an upper chamber and a lower chamber. The two chambers are filled with gas and are isolated in positions close to the end of the work run. The key of the present invention is to modify the volume of the lower chamber to increase it and thus reduce the pressure of the gas contained therein, which is the cause of the said rebound effect.
El resorte de gas de parada comprende una segunda cavidad cilindrica que está separada de la primera cavidad cilindrica mediante una base intermedia. En la base intermedia se encuentra al menos una cavidad pasante que las comunica. The stop gas spring comprises a second cylindrical cavity that is separated from the first cylindrical cavity by an intermediate base. In the intermediate base there is at least one through cavity that communicates them.
A lo largo de la cavidad pasante se desplaza un tercer émbolo que tiene uno de sus extremos en contacto con la cámara inferior y otro de sus extremos está unido o en contacto con un segundo émbolo. En una realización de la invención el extremo del tercer émbolo está unido al segundo émbolo de forma solidaria. El segundo émbolo tiene posibilidad de desplazamiento a lo largo de la segunda cavidad cilindrica, separándola en una primera cámara y una segunda cámara. Along the through cavity a third piston is displaced having one of its ends in contact with the lower chamber and another of its ends is connected or in contact with a second piston. In one embodiment of the invention, the end of the third plunger is attached to the second plunger in solidarity. The second piston has the possibility of moving along the second cylindrical cavity, separating it into a first chamber and a second chamber.
El desplazamiento del segundo émbolo se realiza introduciendo o extrayendo un gas, preferentemente aire neumático, de la segunda cavidad cilindrica a través de un elemento de conexión que está preferentemente situado en la segunda cámara. Cuando se introduce dicho gas, preferentemente aire neumático, en la segunda cámara, el segundo émbolo se desplaza hacia arriba y la primera cavidad cilindrica tiene el mismo volumen que en los cilindros del estado de la técnica. The displacement of the second piston is carried out by introducing or extracting a gas, preferably pneumatic air, from the second cylindrical cavity through a connecting element that is preferably located in the second chamber. When said gas is introduced, preferably air pneumatic, in the second chamber, the second piston moves upwards and the first cylindrical cavity has the same volume as in the prior art cylinders.
Durante el funcionamiento del resorte de gas, cuando el primer émbolo está completamente estirado y no se ha aplicado ninguna fuerza sobre él, la segunda cámara está llena de aire (que se ha introducido en ella a través del elemento de conexión), y el segundo émbolo y el tercer émbolo están en una posición tal que la cámara inferior tiene menor volumen (en ese momento tiene el mismo volumen que en los resortes de gas del estado de la técnica). During operation of the gas spring, when the first piston is fully stretched and no force has been applied to it, the second chamber is filled with air (which has been introduced into it through the connecting element), and the second piston and the third piston are in a position such that the lower chamber has lower volume (at that time it has the same volume as in the gas springs of the prior art).
Cuando se ejerce la fuerza sobre el vástago, se desplaza el primer émbolo, pero el segundo émbolo y el tercer émbolo siguen en su posición más elevada, haciendo que el volumen de la cámara inferior siga siendo el mismo (todavía igual que en los resortes de gas del estado de la técnica). Una vez que el primer émbolo ha llegado a la posición final de carrera y se va a producir el rebote del primer émbolo al retirarse la fuerza que lo ha comprimido, es cuando se expulsa el aire de la segunda cámara. When the force is exerted on the rod, the first piston moves, but the second piston and the third piston remain in their highest position, causing the volume of the lower chamber to remain the same (still the same as in the springs of state of the art gas). Once the first piston has reached the final stroke position and the first piston rebound will occur when the force that has compressed it is removed, it is when the air is expelled from the second chamber.
La presión del gas de la cámara inferior no es capaz por sí sola de vencer la fuerza que el aire que hay en la segunda cámara está ejerciendo sobre el segundo émbolo, pero una vez que se ha expulsado el aire de la segunda cámara sí que puede desplazar dicho segundo émbolo. Al desplazarlo se aumenta el volumen de la cámara inferior, reduciendo su presión. The gas pressure in the lower chamber is not capable of overcoming the force that the air in the second chamber is exerting on the second piston, but once the air in the second chamber has been expelled, it can move said second plunger. Moving it increases the volume of the lower chamber, reducing its pressure.
Los gases de la cámara inferior tienden a ocupar todo el espacio posible, que en este caso es el de la cámara inferior, más el espacio liberado en las cavidades pasantes. Al tener un mayor volumen por el que expandirse el gas contenido en la cámara inferior, la presión en ella disminuye. La fuerza que ejerce el gas de la cámara superior sobre la parte superior del primer émbolo es igual o algo superior a la fuerza que ejerce la nueva presión en la cámara inferior sobre la parte inferior del primer émbolo, y por tanto no hay fuerza neta ascendente sobre dicho émbolo. The gases in the lower chamber tend to occupy as much space as possible, which in this case is that of the lower chamber, plus the space released in the through cavities. By having a larger volume by which to expand the gas contained in the lower chamber, the pressure in it decreases. The force exerted by the gas in the upper chamber on the upper part of the first piston is equal to or somewhat greater than the force exerted by the new pressure in the lower chamber on the lower part of the first piston, and therefore there is no net upward force about said plunger.
DESCRIPCIÓN DE LOS DIBUJOS DESCRIPTION OF THE DRAWINGS
Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características de la invención, de acuerdo con un ejemplo preferente de realización práctica de la misma, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado lo siguiente: To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of said description. where, for illustrative and non-limiting purposes, the following has been represented:
Figura 1.- Muestra una vista de un resorte de gas del estado de la técnica. Figure 1.- Shows a view of a gas spring of the prior art.
Figura 2 - Muestra una vista del resorte de gas de parada de la invención. Figure 2 - Shows a view of the stop gas spring of the invention.
Figura 3.- Muestra una vista del resorte de gas en una posición en la que se ha introducido gas en la tercera cámara y el volumen de la primera cavidad cilindrica no ha sido modificado. Figure 3.- Shows a view of the gas spring in a position in which gas has been introduced into the third chamber and the volume of the first cylindrical cavity has not been modified.
Figura 4.- Muestra una vista en la que se ha extraído gas de la segunda cavidad cilindrica mediante el elemento de conexión y se ha aumentado el volumen de la cámara inferior. Figure 4.- Shows a view in which gas has been extracted from the second cylindrical cavity by means of the connecting element and the volume of the lower chamber has been increased.
REALIZACIÓN PREFERENTE DE LA INVENCIÓN PREFERRED EMBODIMENT OF THE INVENTION
A continuación se describe, con ayuda de las figuras 1 a 4, una realización preferente de la invención que no debe entenderse como un ejemplo limitativo de la invención. El resorte de gas de parada de la presente invención es del tipo de los que comprenden un cuerpo cilindrico con al menos una primera cavidad cilindrica (2) en el interior de la que se desplaza al menos un primer émbolo (3). En una realización preferente dicho primer émbolo (3) divide la primera cavidad cilindrica en una cámara superior (10) y una cámara inferior (1 1 ). A preferred embodiment of the invention, which should not be understood as a limiting example of the invention, is described below with the aid of Figures 1 to 4. The stop gas spring of the present invention is of the type comprising a cylindrical body with at least a first cylindrical cavity (2) inside which at least one first piston (3) moves. In a preferred embodiment said first piston (3) divides the first cylindrical cavity into an upper chamber (10) and a lower chamber (1 1).
Como se ha descrito anteriormente, el problema de los resortes de gas del estado de la técnica, como el mostrado en la figura 1 , es que sufren un efecto rebote cuando el émbolo está en la posición de final de recorrido y se deja de ejercer una fuerza externa. Para evitar dicho efecto rebote la configuración propuesta permite aumentar el volumen de la cámara inferior (1 1 ) de la primera cavidad cilindrica (2). As described above, the problem of gas springs of the prior art, such as that shown in Figure 1, is that they suffer a rebound effect when the piston is in the end-of-travel position and stops exercising external force To avoid this rebound effect, the proposed configuration allows to increase the volume of the lower chamber (1 1) of the first cylindrical cavity (2).
El resorte de gas de parada de la invención se ha representado en la figura 2. Respecto a los resortes del estado de la técnica comprende adicionalmente una segunda cavidad cilindrica (4), separada de la primera cavidad cilindrica (2) mediante una base intermedia (5). En dicha base intermedia (5) se dispone al menos una cavidad pasante (6) que comunica la primera cavidad cilindrica (2) y la segunda cavidad cilindrica (4). The stop gas spring of the invention is shown in Figure 2. With respect to the prior art springs, it additionally comprises a second cylindrical cavity (4), separated from the first cylindrical cavity (2) by means of an intermediate base ( 5). In said intermediate base (5) there is at least one through cavity (6) that communicates the first cylindrical cavity (2) and the second cylindrical cavity (4).
En el interior de la segunda cavidad cilindrica se desplaza un segundo émbolo (7) que en una realización preferente de la invención divide la segunda cavidad cilindrica (4) en una primera cámara (12) y una segunda cámara (13). Asimismo comprende al menos un tercer émbolo (8) que tiene un extremo unido o en contacto con el segundo émbolo (7) y que se desplaza por el interior de la cavidad pasante (6) de la base intermedia (5). Inside the second cylindrical cavity a second piston (7) is displaced which in a preferred embodiment of the invention divides the second cylindrical cavity (4) into a first chamber (12) and a second chamber (13). It also comprises at least a third piston (8) that has an end connected or in contact with the second piston (7) and that travels inside the through cavity (6) of the intermediate base (5).
En la segunda cavidad cilindrica (4) se dispone al menos un elemento de conexión (9) destinado a permitir la introducción y la extracción de un gas, preferentemente aire neumático, en dicha segunda cavidad cilindrica (4). En una realización preferente de la invención dicho elemento de conexión (9) está dispuesto en la segunda cámara (13). En una realización preferente de la invención la cavidad pasante (6) comunica la cámara inferior (1 1 ) con la segunda cavidad cilindrica (4). En otra realización de la invención la cavidad pasante (6) comunica la pnmera cavidad cilindrica (2) con la pnmera cámara (12). En otra realización la cavidad pasante (6) comunica la cámara inferior (1 1 ) con la pnmera cámara (12). In the second cylindrical cavity (4) there is at least one connecting element (9) designed to allow the introduction and extraction of a gas, preferably pneumatic air, in said second cylindrical cavity (4). In a preferred embodiment of the invention said connecting element (9) is arranged in the second chamber (13). In a preferred embodiment of the invention, the through cavity (6) communicates the lower chamber (1 1) with the second cylindrical cavity (4). In another embodiment of the invention the through cavity (6) communicates the cylindrical cavity (2) with the pnmera chamber (12). In another embodiment the through cavity (6) communicates the lower chamber (1 1) with the pnmera chamber (12).
El segundo émbolo (7) y el tercer émbolo (8) pueden conformar una única pieza. En una realización preferente de la invención el resorte de gas de parada comprende dos terceros émbolos (8). Durante el funcionamiento normal del resorte de gas se introduce un gas, preferentemente aire neumático, a través del elemento de conexión (9) para rellenar la segunda cámara (13). En este caso, que se aprecia en la figura 3, el segundo émbolo (7) queda en contacto con la base intermedia (5) y la primera cavidad cilindrica (2) tiene el mismo aspecto que en los resortes de gas del estado de la técnica. The second piston (7) and the third piston (8) can form a single piece. In a preferred embodiment of the invention the stop gas spring comprises two third pistons (8). During normal operation of the gas spring, a gas, preferably pneumatic air, is introduced through the connecting element (9) to fill the second chamber (13). In this case, which can be seen in Figure 3, the second piston (7) is in contact with the intermediate base (5) and the first cylindrical cavity (2) has the same appearance as in the gas springs of the state of the technique.
Para eliminar el efecto rebote que se produce al dejar de aplicar una fuerza externa, se aumenta el volumen de la cámara inferior (1 1 ). Mediante una actuación exterior se extrae el gas de la segunda cámara (13) (aire neumático) a través del elemento de conexión (9), y por efecto de la presión existente en la cámara inferior (1 1 ), desplaza a los terceros émbolos (8) y al segundo émbolo (7) hacia abajo. To eliminate the rebound effect that occurs when an external force is no longer applied, the volume of the lower chamber is increased (1 1). By means of an external action, the gas from the second chamber (13) (pneumatic air) is extracted through the connecting element (9), and due to the pressure existing in the lower chamber (1 1), it displaces the third pistons (8) and the second plunger (7) down.
El gas que está en la cámara inferior (1 1 ) ocupa ahora todo el volumen de dicha cámara inferior y adicionalmente el volumen que ha quedado libre en las cavidades pasantes, como se observa en la figura 4. Así pues disminuye su presión hasta que quedan igualadas las fuerzas ejercidas por el gas a ambos lados del primer émbolo (3). Como ambas fuerzas son aproximadamente ¡guales están en equilibrio y no se produce el efecto rebote de los resortes del estado de la técnica. The gas in the lower chamber (1 1) now occupies the entire volume of said lower chamber and additionally the volume that has been left free in the through cavities, as seen in Figure 4. Thus, its pressure decreases until the forces exerted by the gas on both sides of the first piston (3) are equalized. Since both forces are approximately equal, they are in equilibrium and the rebound effect of the prior art springs does not occur.

Claims

R E I V I N D I C A C I O N E S
1.- Resorte de gas de parada del tipo de los que comprenden: 1.- Stop gas spring of the type that includes:
-un cuerpo cilindrico hueco (1 ) con al menos una primera cavidad cilindrica (2), -a hollow cylindrical body (1) with at least a first cylindrical cavity (2),
-al menos un primer émbolo (3) que se desplaza en dicha primera cavidad cilindrica (2), y está caracterizado por que comprende: -at least one first piston (3) that moves in said first cylindrical cavity (2), and is characterized in that it comprises:
-una segunda cavidad cilindrica (4), separada de la primera cavidad cilindrica (2) mediante una base intermedia (5) que comprende al menos una cavidad pasante (6) que las comunica, -a second cylindrical cavity (4), separated from the first cylindrical cavity (2) by an intermediate base (5) that comprises at least one through cavity (6) that communicates them,
-al menos un segundo émbolo (7) que se desplaza a lo largo de la segunda cavidad cilindrica (4), -at least a second piston (7) that moves along the second cylindrical cavity (4),
-al menos un tercer émbolo (8) que tiene un extremo unido o en contacto con el segundo émbolo (7) y que se desplaza por el interior de la cavidad pasante (6), -at least a third piston (8) that has one end attached to or in contact with the second piston (7) and that moves inside the through cavity (6),
-al menos un elemento de conexión (9) en la segunda cavidad cilindrica (4) destinado a permitir la introducción y la extracción de un gas en dicha segunda cavidad cilindrica (4). -at least one connection element (9) in the second cylindrical cavity (4) intended to allow the introduction and extraction of a gas in said second cylindrical cavity (4).
2 - Resorte de gas de parada según la reivindicación 1 caracterizado por que la primera cavidad cilindrica (2) comprende una cámara superior (10) y una cámara inferior (1 1 ) que están separadas entre sí por el primer émbolo (3). 2 - Stop gas spring according to claim 1 characterized in that the first cylindrical cavity (2) comprises an upper chamber (10) and a lower chamber (1 1) that are separated from each other by the first piston (3).
3. - Resorte de gas de parada según la reivindicación 2 caracterizado por que la cavidad pasante (6) comunica la cámara inferior (1 1 ) con la segunda cavidad cilindrica (6). 3. - Stop gas spring according to claim 2 characterized in that the through cavity (6) communicates the lower chamber (1 1) with the second cylindrical cavity (6).
4. - Resorte de gas de parada según la reivindicación 1 caracterizado por que la segunda cavidad cilindrica (4) comprende una primera cámara (12) y una segunda cámara (13) separadas entre sí por el segundo émbolo (7). 4. - Stop gas spring according to claim 1 characterized in that the second cylindrical cavity (4) comprises a first chamber (12) and a second chamber (13) separated from each other by the second piston (7).
5. - Resorte de gas de parada según la reivindicación 4 caracterizado por que la cavidad pasante (6) comunica la primera cavidad cilindrica (2) con la primera cámara (12). 5. - Stop gas spring according to claim 4 characterized in that the through cavity (6) communicates the first cylindrical cavity (2) with the first chamber (12).
6. - Resorte de gas de parada según las reivindicaciones 2 y 4 caracterizado por que la cavidad pasante (6) comunica la cámara inferior (1 1 ) con la primera cámara (12). 6. - Stop gas spring according to claims 2 and 4 characterized in that the through cavity (6) communicates the lower chamber (1 1) with the first chamber (12).
7. - Resorte de gas de parada según la reivindicación 4 caracterizado por que el elemento de conexión (9) está en la segunda cámara (13). 7. - Stop gas spring according to claim 4 characterized in that the connection element (9) is in the second chamber (13).
8. - Resorte de gas de parada según la reivindicación 1 caracterizado por que el segundo émbolo (7) y el tercer émbolo (8) conforman una única pieza. 8. - Stop gas spring according to claim 1 characterized in that the second piston (7) and the third piston (8) form a single piece.
9. - Resorte de gas de parada según la reivindicación 1 caracterizado por que comprende dos terceros émbolos (8). 9. - Stop gas spring according to claim 1 characterized in that it comprises two third pistons (8).
PCT/ES2013/070647 2013-09-17 2013-09-17 Stop gas spring WO2015040246A1 (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
PCT/ES2013/070647 WO2015040246A1 (en) 2013-09-17 2013-09-17 Stop gas spring

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR563913A (en) * 1922-06-30 1923-12-17 Air suspension for vehicles
DE102006039463A1 (en) * 2006-08-23 2008-02-28 Müller Weingarten AG Method and device for cutting impact damping
DE202009004918U1 (en) * 2009-06-15 2009-09-03 Endrich, Manfred feather

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR563913A (en) * 1922-06-30 1923-12-17 Air suspension for vehicles
DE102006039463A1 (en) * 2006-08-23 2008-02-28 Müller Weingarten AG Method and device for cutting impact damping
DE202009004918U1 (en) * 2009-06-15 2009-09-03 Endrich, Manfred feather

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