DE1426495C - Device for limiting the operating pressure in pneumatic servo controls, especially for brakes - Google Patents
Device for limiting the operating pressure in pneumatic servo controls, especially for brakesInfo
- Publication number
- DE1426495C DE1426495C DE19641426495 DE1426495A DE1426495C DE 1426495 C DE1426495 C DE 1426495C DE 19641426495 DE19641426495 DE 19641426495 DE 1426495 A DE1426495 A DE 1426495A DE 1426495 C DE1426495 C DE 1426495C
- Authority
- DE
- Germany
- Prior art keywords
- piston
- cylinder
- pressure
- chamber
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Description
auf diese Weise ebenfalls mit der Atmosphäre verbunden ist. Der unter der Einwirkung einer Federanordnung 36 stehende Kolben 34 wird durch einen in einer Innenumfangsnut im Zylinder 40 der Nabe des Kolbens 24 liegenden Sprengring 38 gehalten. Der Zylinder 40 liegt gleichachsig gegenüber dem Bund 16. Die freie Kante des Bundes 16 hat Ausfräsungen, die die Verbindung zwischen den Kammern A und D herstellen.in this way is also connected to the atmosphere. The piston 34, which is under the action of a spring arrangement 36, is held by a snap ring 38 located in an inner circumferential groove in the cylinder 40 of the hub of the piston 24. The cylinder 40 lies coaxially with respect to the collar 16. The free edge of the collar 16 has cutouts which establish the connection between the chambers A and D.
Der Kolben 34 trägt an seinem freien Ende einen hohlen Stößel 42, der mit dem federbelasteten Ventil 20 im Kolben 12 zusammenwirken kann. Die Bohrung des Stößels 42 verbindet die Kammer D über die Kammern F und C mit der Atmosphäre.The piston 34 carries at its free end a hollow plunger 42 which can interact with the spring-loaded valve 20 in the piston 12. The bore of the plunger 42 connects the chamber D via the chambers F and C with the atmosphere.
Die Wirkungsweise der beschriebenen Vorrichtung ist folgende: Wenn die Bedienungsperson die Servobremse betätigt, verschiebt sie die Stange 10 in Richtung des Pfeiles X und damit den Kolben 12 gegen die Kraft der Feder 32, bis der Stößel 42 in Anlage an das Ventil 20 gelangt. Nach dieser Anlage ist die Verbindung zwischen den Kammern F und D unterbrochen. Eine weitere Verschiebung des Kolbens 12 hebt das Ventil 20 von der öffnung 18 ab. Die in der Kammer B enthaltene Preßluft strömt in die Kammer D und von da in die Kammer A und übt dann einen Druck auf den Kolben 24 aus, der seinerseits die mit ihm verbundene Stange 22 des gesteuerten 5 Organs verschiebt.The operation of the device described is as follows: When the operator actuates the servo brake, he moves the rod 10 in the direction of arrow X and thus the piston 12 against the force of the spring 32 until the plunger 42 comes into contact with the valve 20. After this system, the connection between chambers F and D is interrupted. A further displacement of the piston 12 lifts the valve 20 from the opening 18. The compressed air contained in the chamber B flows into the chamber D and from there into the chamber A and then exerts a pressure on the piston 24, which in turn moves the rod 22 of the controlled organ connected to it.
In der Kammer D baut sich dabei ein Druck auf, der auch auf den Kolben 34 im Zylinder 40 in der Nabe des Kolbens 24 gegen die Kraft der Federanordnung 36 wirkt. Wenn dieser Druck einen durchIn the process, a pressure builds up in the chamber D which also acts on the piston 34 in the cylinder 40 in the hub of the piston 24 against the force of the spring arrangement 36. When this pressure takes you through
ίο die Spannung der Federanordnung 36 vorbestimmten Begrenzungswert überschreitet, verschiebt sich der Kolben 34 gegen die Kraft dieser Feder. Dabei verschiebt sich gleichzeitig der hohle Stößel 42 in der Figur nach unten, wodurch der freie Durchgangsquerschnitt des Ventils 20, also der Querschnitt der Öffnung 18 vermindert wird, bis dieser Durchgang ganz geschlossen ist und die Kammer D mit der Atmosphäre verbunden ist.ίο the tension of the spring arrangement 36 exceeds a predetermined limiting value, the piston 34 moves against the force of this spring. At the same time, the hollow plunger 42 moves downward in the figure, whereby the free passage cross section of the valve 20, i.e. the cross section of the opening 18, is reduced until this passage is completely closed and the chamber D is connected to the atmosphere.
Anstatt im Kolben des gesteuerten Organs 22, 24.Instead of in the piston of the controlled organ 22, 24.
kann die Zylinder-Kolben-Gruppe 34, 40 im Kolben 12 des Steuerorgans 10, 12 angeordnet sein. In diesem Fall liegt dann die Kammer D in der Nabe des Kolbens 24. the cylinder-piston group 34, 40 can be arranged in the piston 12 of the control member 10, 12. In this case, the chamber D is then located in the hub of the piston 24.
Claims (2)
einen Kolben umfassenden gesteuerten Organ und Erfindungsgemäß wird diese Aufgabe dadurch ge-1. Device for limiting the operating device mentioned at the beginning of an automatic pressure in pneumatic servo controls, in particular 5 limiting the special acting on the servo control piston for brakes, with a hollow plunger pressure to a predetermined value in structural terms and a spring-loaded valve between the simple way to enable
controlled organ comprising a piston and according to the invention this object is thereby achieved
24) oder der Kolben (12) des Steuerorgans (10, Diese Vorrichtung zeichnet sich durch einen Auf-the control member having a piston which triggers that the piston of the controlled member or the servo control, with one between the piston of the control member a pressure chamber lying on the piston called upon actuation through that of the control member progressively in the pressure chamber of the control member and through the Controlled organ as well as building-up pressure-responsive cylinder-piston through the spring-loaded valve and which this group carries, to whose piston the hollow plunger actuating the pressure chamber valve is fastened either with penetrating hollow plunger and whose pistons on the one side are connected to the pressure medium source or the vent by which can be pressure-bonded in the chamber, characterized in that the pressure prevailing in the chamber and on its other side that the piston (24) of the controlled member (22, side is acted upon by a spring arrangement.
24) or the piston (12) of the control element (10, This device is characterized by a
(42) befestigt ist und deren Kolben (34) auf der Eine Ausgestaltung der Erfindung besteht darin,12) a cylinder-piston- pressure responding to the pressure of the actuation of the control element, which allows easy and inexpensive manufacture progressively in the pressure chamber (A) in large series with tight tolerances, and which also has a perfect seal Group (34, 40) on whose piston (34) the hollow plunger penetrating the pressure chamber (A) is ensured even after prolonged use and under heavy working conditions.
(42) is attached and its piston (34) on the An embodiment of the invention consists in
Vorsteuerkolbens derart zusammenwirkt, daß eine Die Nabe des Kolbens 24 bildet einen Zylinder 40,The invention relates to an apparatus 45 is a chamber connected to the source of compressed air as is for limiting the operating pressure in the pneumatic chamber with a E'iese formed by a collar 16 on the servo controls, in particular for brakes, with the end of the piston chamber 12 through a D Hollow plunger and a spring-loaded valve an opening 18 connected, which forms a seat for a valve between the one piston comprising spring-loaded valve 20, which is a variable-controlled member and the 50 bares shut-off member of the servo brake, which has a piston. The ge control element of the servo control, with an element 22, 24 of the servo brake that is controlled between, has a pressure chamber lying on said piston through piston 24 and a rod connected to this, the control element and through the controlled element so- 22. This piston 24 moves in a kowie through the spring-loaded valve and the cylinder 26 lying axially to the cylinder 14 against the valve actuating the hollow plunger either to which the force of a spring arrangement 28 can be connected. The piston 24 can be connected to the pressure medium source or to the vent. forms in the cylinder 26 has two chambers, of which one C A known device of this type, which is connected as a manipulated directly with the atmosphere and other forms its motor for the injection pump of diesel engines, a pressure chamber A. This pressure is used and with a spring-loaded pilot piston chamber is provided with a connecting piece 30 and a graduated piston, has a 60 connected to any device to be operated. The spring-loaded pistons 12 and 24 arranged in the graduated piston are biased away from each other by a return spring double seat valve, which has a hollow plunger of the 32.
The pilot piston cooperates in such a way that the hub of the piston 24 forms a cylinder 40,
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT3473063 | 1963-05-07 | ||
IT3473063 | 1963-05-07 | ||
DEF0042833 | 1964-05-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1426495A1 DE1426495A1 (en) | 1969-02-06 |
DE1426495B2 DE1426495B2 (en) | 1972-07-13 |
DE1426495C true DE1426495C (en) | 1973-02-08 |
Family
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