EP1818544A1 - Magnetic piston for pneumatic cylinder - Google Patents
Magnetic piston for pneumatic cylinder Download PDFInfo
- Publication number
- EP1818544A1 EP1818544A1 EP07001261A EP07001261A EP1818544A1 EP 1818544 A1 EP1818544 A1 EP 1818544A1 EP 07001261 A EP07001261 A EP 07001261A EP 07001261 A EP07001261 A EP 07001261A EP 1818544 A1 EP1818544 A1 EP 1818544A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support body
- ring
- magnetic
- halves
- magnetic piston
- 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.)
- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
Definitions
- the invention relates to a magnetic piston according to the preamble of claim 1; z. B. for operating reed switches.
- the halves of the support body made of aluminum are L-shaped profiled and joined together in the central radial plane so that they form a groove-like receptacle for the approximately square profiled magnet ring.
- a blank of each half of the support body must be machined on the outer edge, or each half cast into a corresponding mold.
- the invention is therefore based on the object to provide a disadvantage avoiding this magnetic piston of the type mentioned, which is relatively quick and easy to manufacture.
- the magnetic piston according to the invention for a double-acting pneumatic cylinder which is not shown and against which the piston is to be sealed, mainly from two, for mounting a piston rod, also not shown by means of a bore 10 centrally perforated, same, parallel metal discs 12, for example made of sheet steel Pole shoes, which form the two halves of a support body; from a disc-shaped, permanent magnetic ring 14 embedded in plastic magnetic powder which reinforces the support body and has a diameter of the bore 10 corresponding inner width and with the two metal discs 12 forms a flat sandwich 12/14/12, determined by these discs 12 specific Outer radius is large in relation to its axial width, while its inner diameter approximately equal to this width; and of a symmetrically constructed sealing ring 16 made of plastic, for example PUR, or rubber on the circumference of the sandwich assembly 12/14/12, which two with respect to the axis 18 of the bore 10 axially and radially outwardly projecting sealing lips 20 and axially extending therebetween, center
- This sealing ring 16 is part of a respect to a central radial plane between the two metal discs 12 symmetrically shaped, one-piece shell 24 having a substantially U-shaped profile, which these discs 12 on their opposite outer sides completely (in Figure 2 left) or in part (in Fig.2 right) and dressed on these four in the circumferential direction evenly distributed, separate, flat buffer 26 has the piston stop at the cylinder end.
- the inner surface of the bore 10 is not covered by the sheath 24, e.g. can be produced by encapsulation of the radially outer edge of the support body 12,12.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Actuator (AREA)
Abstract
Description
Die Erfindung betrifft einen Magnetkolben gemäß Oberbegriff des Anspruches 1; z. B. zum Betätigen von Reed-Schaltern.The invention relates to a magnetic piston according to the preamble of
Bei einem bekannten Kolben dieser Art sind die Hälften des aus Aluminium gefertigten Stützkörpers L-förmig profiliert und in der mittleren Radialebene so zusammengefügt, dass sie eine nutartige Aufnahme für den ungefähr quadratisch profilierten Magnet-Ring bilden. Infolgedessen muss ein Rohling jeder Stützkörper-Hälfte am äußeren Rand spanabhebend bearbeitet oder jede Hälfte in eine entsprechende Form gegossen werden.In a known piston of this type, the halves of the support body made of aluminum are L-shaped profiled and joined together in the central radial plane so that they form a groove-like receptacle for the approximately square profiled magnet ring. As a result, a blank of each half of the support body must be machined on the outer edge, or each half cast into a corresponding mold.
Nachteilig daran sind der zeitliche Aufwand für diese Bearbeitung bzw. das Erfordernis der Formherstellung, und der diesbezügliche Kostenaufwand.The disadvantage of this is the time required for this processing or the requirement of mold production, and the related cost.
Der Erfindung liegt daher die Aufgabe zugrunde, einen diesen Nachteil vermeidenden Magnetkolben der eingangs genannten Art zu schaffen, welcher relativ schnell und einfach herzustellen ist.The invention is therefore based on the object to provide a disadvantage avoiding this magnetic piston of the type mentioned, which is relatively quick and easy to manufacture.
Diese Aufgabe ist erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of
Durch zwei flache Metallscheiben ohne Stufung und die entsprechende Scheibenform des Magnet-Ringes erübrigt sich vorteilhafterweise eine Bearbeitung der Stützkörper-Hälften bzw. Anfertigung einer Gießform hierfür.By two flat metal discs without grading and the corresponding disc shape of the magnetic ring advantageously eliminates a machining of the support body halves or making a mold for this purpose.
Zweckmäßige Ausgestaltungen von Besonderheiten des bekannten Magnetkolbens durch die Erfindung sind in den Ansprüchen 2 und 3 charakterisiert.Advantageous embodiments of special features of the known magnetic piston by the invention are characterized in the claims 2 and 3.
Im Folgenden ist die Erfindung anhand einer durch die Zeichnung beispielhaft dargestellten Ausführungsform des erfindungsgemäßen Magnetkolbens im Einzelnen erläutert.In the following, the invention is explained with reference to an embodiment of the magnetic piston according to the invention by way of example illustrated by the drawing.
Es zeigt
- Fig. 1
- eine von zwei gleichen Seitenansichten der Ausführungsform
und - Fig. 2
- einen zentralen Querschnitt längs der Linie II-II in Fig. 1 durch die Ausführungsform
- Fig. 1
- one of two like side views of the embodiment
and - Fig. 2
- a central cross section along the line II-II in Fig. 1 by the embodiment
Im Ausführungsbeispiel besteht der erfindungsgemäße Magnetkolben für einen doppelwirkenden Pneumatikzylinder, der nicht gezeigt ist und gegen den der Kolben abzudichten ist, hauptsächlich aus zwei, zur Befestigung einer ebenfalls nicht gezeigten Kolbenstange mittels einer Bohrung 10 zentral gelochten, gleichen, parallelen Metallscheiben 12 z.B. aus Stahlblech als Polschuhen, welche die beiden Hälften eines Stützkörpers bilden; aus einem scheibenförmigen, permanentmagnetischen Ring 14 aus in Kunststoff gebettetem Magnetpulver, welcher den Stützkörper verstärkt sowie eine dem Durchmesser der Bohrung 10 entsprechende innere Weite hat und mit den beiden Metallscheiben 12 eine flache Sandwichanordnung 12/14/12 bildet, deren durch diese Scheiben 12 bestimmter Außenradius groß ist im Verhältnis zu ihrer axialen Breite, während ihr Innendurchmesser dieser Breite annähernd gleicht; und aus einem symmetrisch aufgebauten Dichtungsring 16 aus Kunststoff, z.B. PUR, oder Gummi am Kreisumfang der Sandwichanordnung 12/14/12, welcher zwei bezüglich der Achse 18 der Bohrung 10 axial und radial nach außen vorspringende Dichtungslippen 20 sowie eine sich axial zwischen diesen erstreckende, mittig vertiefte, d.h. zweiteilige kreiszylindrische Kolbenführungsfläche 22 aufweist, die auf der Zylinderwandung gleitet. Dieser Dichtungsring 16 ist Bestandteil einer bezüglich einer mittleren Radialebene zwischen den beiden Metallscheiben 12 symmetrisch ausgeformten, einstückigen Ummantelung 24 mit im Wesentlichen U-förmigem Profil, welche diese Scheiben 12 auf ihren einander abgewandten Außenseiten vollständig (in Fig.2 links) bzw. zum Teil (in Fig.2 rechts) bekleidet und auf diesen je vier in Umfangsrichtung gleichmäßig verteilte, voneinander getrennte, flache Puffer 26 für den Kolbenanschlag am Zylinderende aufweist.In the exemplary embodiment, the magnetic piston according to the invention for a double-acting pneumatic cylinder, which is not shown and against which the piston is to be sealed, mainly from two, for mounting a piston rod, also not shown by means of a
Die Innenfläche der Bohrung 10 ist von der Ummantelung 24 nicht bekleidet, die z.B. durch Umspritzen des radial äußeren Randes des Stützkörpers 12,12 erzeugt werden kann.The inner surface of the
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200620001970 DE202006001970U1 (en) | 2006-02-08 | 2006-02-08 | Magnetic piston for pneumatic cylinders |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1818544A1 true EP1818544A1 (en) | 2007-08-15 |
Family
ID=36371998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07001261A Withdrawn EP1818544A1 (en) | 2006-02-08 | 2007-01-20 | Magnetic piston for pneumatic cylinder |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1818544A1 (en) |
DE (1) | DE202006001970U1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3136228A (en) * | 1962-02-05 | 1964-06-09 | Baldwin Montrose Chemical Comp | Piston structure |
US4378726A (en) * | 1979-11-24 | 1983-04-05 | Kurt Stoll | Piston designed for use with a magnetic force pickup |
EP0351317A1 (en) * | 1988-07-13 | 1990-01-17 | Automax | Improved actuator |
EP1058037A1 (en) * | 1999-06-01 | 2000-12-06 | Festo AG & Co | Piston for a working cylinder and method of its manufacture |
-
2006
- 2006-02-08 DE DE200620001970 patent/DE202006001970U1/en not_active Expired - Lifetime
-
2007
- 2007-01-20 EP EP07001261A patent/EP1818544A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3136228A (en) * | 1962-02-05 | 1964-06-09 | Baldwin Montrose Chemical Comp | Piston structure |
US4378726A (en) * | 1979-11-24 | 1983-04-05 | Kurt Stoll | Piston designed for use with a magnetic force pickup |
EP0351317A1 (en) * | 1988-07-13 | 1990-01-17 | Automax | Improved actuator |
EP1058037A1 (en) * | 1999-06-01 | 2000-12-06 | Festo AG & Co | Piston for a working cylinder and method of its manufacture |
Also Published As
Publication number | Publication date |
---|---|
DE202006001970U1 (en) | 2006-04-27 |
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