EP1058938B1 - Device for switching an electrical connection, especially a limit switch - Google Patents

Device for switching an electrical connection, especially a limit switch Download PDF

Info

Publication number
EP1058938B1
EP1058938B1 EP99907536A EP99907536A EP1058938B1 EP 1058938 B1 EP1058938 B1 EP 1058938B1 EP 99907536 A EP99907536 A EP 99907536A EP 99907536 A EP99907536 A EP 99907536A EP 1058938 B1 EP1058938 B1 EP 1058938B1
Authority
EP
European Patent Office
Prior art keywords
actuator
switching element
switching
energy store
plunger
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 - Lifetime
Application number
EP99907536A
Other languages
German (de)
French (fr)
Other versions
EP1058938A1 (en
Inventor
Peter Schmidt
Siegfried Sticher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Euchner GmbH and Co KG
Original Assignee
Euchner GmbH and Co KG
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 Euchner GmbH and Co KG filed Critical Euchner GmbH and Co KG
Publication of EP1058938A1 publication Critical patent/EP1058938A1/en
Application granted granted Critical
Publication of EP1058938B1 publication Critical patent/EP1058938B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02Details
    • H01H13/12Movable parts; Contacts mounted thereon
    • H01H13/14Operating parts, e.g. push-button
    • H01H13/18Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift

Definitions

  • the invention relates to a device for switching an electrical Connection, in particular a limit switch, according to the preamble of Claim 1, for example a built-in limit switch for use as Position switch in an electromagnetic brake.
  • Installation limit switches are known for example from DE 18 82 059 U 1.
  • an actuating bolt which can be actuated from outside the limit switch and has a hemispherical end section comes into direct contact with the actuator of an electrical switching element after an adjustable idle stroke
  • the layout specification DE 15 88 052 shows a jump switch for one electrical limit switch, in which the actuator is cup-shaped.
  • a generic device is from FR 26 13 119 as the prior art Known technology in which an operable from outside the device Ram means axially with one from outside the device inaccessible actuator for an electrical switching element is coupled, a first energy accumulator, in particular one under compressive stress standing first coil spring, the actuator towards preloads the ram.
  • a control surface for example a cam, which is attached to an object to be monitored, which can be moved in translation or rotation, comes into contact with the tappet means of the device and actuates the electrical switching element of the device, optionally with the interposition of an actuator element.
  • limit switches are subjected to very high accelerations when the brake is actuated, in particular high acceleration forces occur in the axial direction in relation to the tappet means or the actuator. The limit switch is mechanically stressed by the high acceleration forces.
  • the first energy store holds the actuator in the direction preloaded on the tappet and thereby reduces the idle stroke to Minimum that is particularly due to the high occurring Accelerating forces adversely affect the mechanical stability of the Switch element would impact.
  • the bias in space-saving instructions are implemented, in particular the axial length the device is minimized.
  • the first energy store can either by a coil spring or another, from the prior art known resiliently deformable element may be formed, for example by a plate spring, by a rubber ring or the like. It is only essential that the first energy store is designed and is arranged that it has the shortest possible axial size Device allows.
  • the device has a stop for the axial Movement of the actuator on which the cup-shaped section of the Actuator in an end position in the system.
  • a shortened axial construction of the device is possible.
  • the cup-shaped section of the Actuator completely takes up the switching element.
  • the pot-shaped Section can be a contiguous part or full circle Have lateral surface or a finger-shaped structure with itself in the axial Towards circumferential fingers.
  • the actuator On the pestle means facing side, the actuator preferably has an axially central or ring-shaped elevation.
  • the actuator is preferably in one piece and rotationally symmetrical.
  • the one formed by the device mechanical stop for the cup-shaped section of the actuator takes the possibly occurring high acceleration forces on and provides effective protection for the electrical contacts of the Switching element, without the axial length of the device is enlarged.
  • the switching element on one example, in the Device screw-in clamping bush set. This will make one Positioning of the switching element within the device and for example, a switching point setting simplified. Beyond that the assembly effort is minimized.
  • the gill sleeve forms the stop for the cup-shaped section of the actuator.
  • the clamping bush in the The device can be set in an adjustable manner, for example can be screwed in thereby also the stop or the maximum travel of the actuator adjustable.
  • the first energy accumulator is radial between the Switching element and the cup-shaped section of the actuator arranged and is supported on the bottom surface of the actuator, on which also Actuator of the switching element is in plant.
  • the first energy accumulator could also be the grasp the pot-shaped section of the beta tiger and attach itself, for example support an annular shoulder of the actuator.
  • actuator and ram means eme Membrane, for example a rubber membrane, which dampens the Accelerating forces and especially against the seal Contamination from dust, abrasion and / or moisture from the the switching element receiving switching room of the device opposite the receiving the ram means and opposite the outside of the Device usually not hermetically sealed part of the Device serves.
  • eme Membrane for example a rubber membrane, which dampens the Accelerating forces and especially against the seal Contamination from dust, abrasion and / or moisture from the the switching element receiving switching room of the device opposite the receiving the ram means and opposite the outside of the Device usually not hermetically sealed part of the Device serves.
  • the actuating pin is at one end in one a threaded sleeve of the device axially fixed perforated disk. At its opposite end, the actuating pin is in one Holding bush guided, which in turn guided in the plunger element is. This results in a safe and, in particular, space-saving Guiding the tappet means in the device.
  • the device has a third energy accumulator, which is supported on the perforated disc and acts on the tappet means and in particular the push element in one with one end facing outwards the starting position protruding from the device.
  • the supernatant of the Tappet element is made by the interaction of a cantilever Tappet element and an annular shoulder in the threaded sleeve Are defined.
  • the plunger element provides instructions for certain applications its end protruding from the device is essentially one hemispherical shape, for example by means of an in the plunger element inserted ball.
  • the limit switch has a plunger element at a front axial end 101, which is guided in an axial bore of the threaded sleeve 102 and has an annular groove 103 for receiving a lubricant.
  • the plunger element 101 is cup-shaped and in particular has an annular projection 104, which together with one on the Threaded sleeve 102 formed an annular shoulder 105 a mechanical stop for the movement of the plunger element in the direction forms on the front end of the limit switch.
  • a likewise pot-shaped actuating pin 106 is guided in the cavity of the pot-shaped plunger element 101 by means of a holding bush 107.
  • the actuating bolt 106 also has an annular projection which, together with an annular shoulder of the holding bush 107, serves as a mechanical stop for the movement of the actuating bolt 106 in the direction of the switching element 119.
  • the tappet element 101, the actuating bolt 106 and the holding bush 107 are aligned coaxially and form the tappet means.
  • a third coil spring 108 which is supported at one end on the plunger element 101 or the holding bush 107 and is supported at its other end on a perforated disk 109 which is fixedly connected to the threaded sleeve 102, holds the plunger element 101 under spring force in the front system shown. With its central opening, the perforated disk 109 also serves to axially guide the actuating bolt 106.
  • a membrane 112 Between the actuating pin 106 and the actuator 110 of the electrical switching element 119 is a membrane 112, which is pressed by a pressure plate 113 against a third shoulder of the threaded sleeve 102, and is made of plastic, rubber or steel, for example.
  • the force on the turntable 113 is provided by screwing a clamping bush 114 into the threaded sleeve 102.
  • the sleeve 115 protects the switching element 119 from moisture, contamination and / or mechanical damage and forms a connection space for a line (not shown) or for receiving a plug connector.
  • the cavity can be filled with resin.
  • Actuator 110 abutting membrane 112 has a cup-shaped section which comprises a threaded part 111 of the switching element 119 circumferentially.
  • a radial between the cup-shaped section and the threaded part 111 of the switching element 119 arranged on the actuator 110 and the clamping bush 114 supporting and under pressure first coil spring 116 ensures a spring-loaded and constant system of the actuator 110 on the membrane 112 and thus for a constant coupling of the actuator 110 with the actuating pin 106 and thus with the Tappet element 101.
  • a second one under pressure Coil spring 118 arranged in the mutually facing cavities of the actuating pin 106 and the plunger element 101.
  • the power to deflect the second Coil spring 118 is greater than the sum of the two forces Deflection of the first coil spring 116 and the switching element 119 or the actuator 120.
  • the threaded part 111 of the switching element 119 serves to receive and guide the actuator 120, which is on its from Actuator 110 removed portion at least one electrical contact of the connection to be switched.
  • the clamping bush 114 has one first annular shoulder 117 on which a mechanical stop for forms the cup-shaped section of the actuator 110.
  • Switching element 119 Radial between that Switching element 119 and the first paragraph 117 is a second, preferably arranged annular shoulder on which a first end of the first Coil spring 116 is in plant, the second end as well the actuator 120 of the switching element 119 on the bottom surface of the Actuator 110 is in plant.
  • the electrical lines are connected to the Connections 121 of the switching element 119 connected and from the Limit switch led out downwards.
  • the total length of the limit switch is 40 mm.
  • the headboard has an M 12 ⁇ 1 external thread.

Abstract

The invention relates to a device for switching an electrical connection, especially a limit switch, comprising a plunger means (101, 106) which can be actuated from outside the device and is axially coupled to an actuator (110) which is not accessible from outside the device and designed for an electrical switch element (119). According to the invention a first energy store, especially a first coil spring (116) subjected to a compressive stress, pretenses the actuator (110) in the direction of the plunger means (101, 106). The aim of the invention is to provide a device which while having especially axially reduced dimensions offers perfectly reliable switching performance during switching, even at elevated acceleration forces, as well as mechanical stability, in particular mechanical overload protection for the switching element. To this end the first energy store at least partly surrounds the switching element (119).

Description

Die Erfindung betrifft eine Vorrichtung zum Schalten einer elektrischen Verbindung, insbesondere einen Grenztaster, gemäß dem Oberbegriff des Anspruchs 1, beispielsweise einen Einbau-Grenztaster für den Einsatz als Positionsschalter in einer elektromagnetischen Bremse.The invention relates to a device for switching an electrical Connection, in particular a limit switch, according to the preamble of Claim 1, for example a built-in limit switch for use as Position switch in an electromagnetic brake.

Einbau-Grenztaster sind beispielsweise aus der DE 18 82 059 U 1 bekannt.
Dabei kommt ein von außerhalb des Grenztasters betätigbarer und einen halbkugelförmigen Endabschnitt aufweisender Betätigungsbolzen nach einem einstellbaren Leerhub in unmittelbare Anlage mit dem Stellglied eines elektrischen Schaltelements
Installation limit switches are known for example from DE 18 82 059 U 1.
In this case, an actuating bolt which can be actuated from outside the limit switch and has a hemispherical end section comes into direct contact with the actuator of an electrical switching element after an adjustable idle stroke

Die Auslegeschrift DE 15 88 052 zeigt ein Sprungschaltwerk für einen elektrischen Endschalter, bei dem der Betätiger topfförmig ausgebildet ist.The layout specification DE 15 88 052 shows a jump switch for one electrical limit switch, in which the actuator is cup-shaped.

Eine gattungsgemäße Vorrichtung ist aus der FR 26 13 119 als Stand der Technik bekannt, bei dem ein von außerhalb der Vorrichtung betätigbares Stößelmittel axial mit einem von außerhalb der Vorrichtung unzugänglichen Betätiger für ein elektrisches Schaltelement gekoppelt ist, wobei ein erster Kraftspeicher, insbesondere eine unter Druckspannung stehende erste Schraubenfeder, den Betätiger in Richtung auf das Stößelmittel vorspannt.A generic device is from FR 26 13 119 as the prior art Known technology in which an operable from outside the device Ram means axially with one from outside the device inaccessible actuator for an electrical switching element is coupled, a first energy accumulator, in particular one under compressive stress standing first coil spring, the actuator towards preloads the ram.

Bei den bekannten Vorrichtungen kommt eine Steuerfläche, beispielsweise eine Nocke, die an einem zu überwachenden, translatorisch oder rotatorisch bewegbaren Gegenstand angebracht ist, in Kontakt mit dem Stößelmittel der Vorrichtung und betätigt, gegebenenfalls unter Zwischenschaltung eines Betätigerelements, das elektrische Schaltelement der Vorrichtung. Beim Einsatz in elektromagnetischen Bremsen werden Grenztaster sehr hohen Beschleunigungen beim Betätigen der Bremse ausgesetzt, insbesondere treten hohe Beschleunigungskräfte in axialer Richtung bezogen auf die Stößelmittel bzw. den Betätiger auf.
Der Grenztaster wird durch die hohen Beschleunigungskräfte mechanisch stark beansprucht.
In the known devices, a control surface, for example a cam, which is attached to an object to be monitored, which can be moved in translation or rotation, comes into contact with the tappet means of the device and actuates the electrical switching element of the device, optionally with the interposition of an actuator element. When used in electromagnetic brakes, limit switches are subjected to very high accelerations when the brake is actuated, in particular high acceleration forces occur in the axial direction in relation to the tappet means or the actuator.
The limit switch is mechanically stressed by the high acceleration forces.

Es ist daher die Aufgabe der Erfindung, eine Vorrichtung bereitzustellen, die bei einer insbesondere axial kleinen Baugröße auch bei hohen Beschleunigungskräften während des Schaltvorganges ein einwandfreies Schaltverhalten bietet und mechanisch stabil ist, insbesondere einen mechanischen Überlastschutz für das Schaltelement aufweist.It is therefore the object of the invention to provide a device which, in particular with an axially small size, also with large ones Acceleration forces during the switching process a flawless Offers switching behavior and is mechanically stable, especially one has mechanical overload protection for the switching element.

Die Aufgabe wird durch die im Anspruch 1 bestimmte Vorrichtung gelöst. Besondere Ausführungsarten der Erfindung sind in den Unteransprüchen offenbart.The object is achieved by the device defined in claim 1. Particular embodiments of the invention are in the subclaims disclosed.

Gemäß Anspruch 1 hält der erste Kraftspeicher den Betätiger in Richtung auf das Stößelmittel vorgespannt und reduziert dadurch den Leerhub auf ein Minimum, der sich insbesondere aufgrund der auftretenden hohen Beschleunigungskräfte nachteilig auf die mechanische Stabilität des Schalterelements auswirken würde. Durch das Umgreifen des Schaltelements durch den ersten Kraftspeicher wird die Vorspannung in platzsparender Weisung realisiert, insbesondere wird die axiale Baulänge der Vorrichtung minimiert. Der erste Kraftspeicher kann entweder durch eine Schraubenfeder oder durch ein anderes, aus dem Stand der Technik bekanntes federelastisch verformbares Element gebildet sein, beispielsweise durch eine Tellerfeder, durch einen Kautschukring oder dergleichen. Wesentlich ist lediglich, daß der erste Kraftspeicher so ausgestaltet und angeordnet ist, daß er eine möglichst kurze axiale Baugröße der Vorrichtung ermöglicht.According to claim 1, the first energy store holds the actuator in the direction preloaded on the tappet and thereby reduces the idle stroke to Minimum that is particularly due to the high occurring Accelerating forces adversely affect the mechanical stability of the Switch element would impact. By embracing the Switching element by the first energy store, the bias in space-saving instructions are implemented, in particular the axial length the device is minimized. The first energy store can either by a coil spring or another, from the prior art known resiliently deformable element may be formed, for example by a plate spring, by a rubber ring or the like. It is only essential that the first energy store is designed and is arranged that it has the shortest possible axial size Device allows.

Gemäß Anspruch 2 weist die Vorrichtung einen Anschlag für die axiale Bewegung des Betätigers auf, an dem der topfförmige Abschnitt des Betätigers in einer Endposition in Anlage ist. Durch das Umgreifen des Schaltelements durch den einen Anschlag erfahrenden topfförmigen Abschnitt ist eine verkürzte axiale Bauweise der Vorrichtung möglich. Denkbar ist insbesondere auch, daß der topfförmige Abschnitt des Betätigers das Schaltelement vollständig aufnimmt. Der topfförmige Abschnitt kann eine zusammenhängende teil- oder vollkreisförmige Mantelfläche aufweisen oder eine fingerförmige Struktur mit sich in axialer Richtung erstreckenden umfänglichen Fingern. Auf der dem Stößelmittel zugewandten Seite weist der Betätiger vorzugsweise eine axial zentrische oder ringformige Erhebung auf. Der Betätiger ist vorzugsweise einstückig und rotationssvmmetrisch ausgebildet. Der von der Vorrichtung gebildete mechanische Anschlag für den topfförmigen Abschnitt des Betätigers nimmt die gegebenenfalls auftretenden hohen Beschleunigungskräfte auf und bildet einen wirksamen Schutz für die elektrischen Kontakte des Schaltelements, ohne daß dadurch die axiale Baulänge der Vorrichtung vergrößert ist.According to claim 2, the device has a stop for the axial Movement of the actuator on which the cup-shaped section of the Actuator in an end position in the system. By embracing the Switch element by the pot-shaped experiencing a stop Section, a shortened axial construction of the device is possible. In particular, it is also conceivable that the cup-shaped section of the Actuator completely takes up the switching element. The pot-shaped Section can be a contiguous part or full circle Have lateral surface or a finger-shaped structure with itself in the axial Towards circumferential fingers. On the pestle means facing side, the actuator preferably has an axially central or ring-shaped elevation. The actuator is preferably in one piece and rotationally symmetrical. The one formed by the device mechanical stop for the cup-shaped section of the actuator takes the possibly occurring high acceleration forces on and provides effective protection for the electrical contacts of the Switching element, without the axial length of the device is enlarged.

Gemäß Anspruch 3 ist das Schaltelement an einer beispielsweise in die Vorrichtung einschraubbaren Klemmbuchse festgelegt. Dadurch wird eine Positionierung des Schaltelements innerhalb der Vorrichtung und beispielsweise eine Schaltpunkteinstellung vereinfacht. Darüber hinaus ist der Montageaufwand minimiert.According to claim 3, the switching element on one example, in the Device screw-in clamping bush set. This will make one Positioning of the switching element within the device and for example, a switching point setting simplified. Beyond that the assembly effort is minimized.

Gemäß Anspruch 4 bildet die Kiemmbuchse den Anschlag für den topfförmigen Abschnitt des Betätigers. Soweit die Klemmbuchse in der Vorrichtung einstellbar festlegbar ist, beispielsweise einschraubbar ist, ist dadurch auch der Anschlag bzw. der maximale Verfahrweg des Betätigers einstellbar.According to claim 4, the gill sleeve forms the stop for the cup-shaped section of the actuator. As far as the clamping bush in the The device can be set in an adjustable manner, for example can be screwed in thereby also the stop or the maximum travel of the actuator adjustable.

Gemäß Anspruch 5 ist der erste Kraftspeicher radial zwischen dem Schaltelement und dem topfförmigen Abschnitt des Betätigers angeordnet und stützt sich an der Bodenfläche des Betätigers ab, an der auch ein Stellglied des Schaltelements in Anlage ist. Durch diese Anordnung läßt sich die radiale und axiale Baugröße der Vorrichtung auf ein Minimum reduzieren. Alternativ dazu könnte der erste Kraftspeicher auch den topfförmigen Abschnitt des Betatigers umgreifen und sich beispielsweise an einer ringförmigen Schulter des Betätigers abstützen.According to claim 5, the first energy accumulator is radial between the Switching element and the cup-shaped section of the actuator arranged and is supported on the bottom surface of the actuator, on which also Actuator of the switching element is in plant. By this arrangement lets the radial and axial size of the device to a minimum to reduce. Alternatively, the first energy accumulator could also be the grasp the pot-shaped section of the beta tiger and attach itself, for example support an annular shoulder of the actuator.

Gemäß Anspruch 6 befindet sich zwischen Betätiger und Stoßelmittel eme Membran, beispielsweise eine Gummimembran, die der Dampfung der Beschleunigungskräfte und insbesondere der Abdichtung gegenüber Verunreinigungen durch Staub, Abrieb und/oder Feuchtigkeit des das Schaltelement aufnehmenden Schaltraumes der Vorrichtung gegenüber dem die Stößelmittel aufnehmenden und gegenüber dem Außenraum der Vorrichtung in der Regel nicht hermetisch dicht abgeschlossenen Teil der Vorrichtung dient.According to claim 6 is between actuator and ram means eme Membrane, for example a rubber membrane, which dampens the Accelerating forces and especially against the seal Contamination from dust, abrasion and / or moisture from the the switching element receiving switching room of the device opposite the receiving the ram means and opposite the outside of the Device usually not hermetically sealed part of the Device serves.

Gemäß Anspruch 7 wirkt zwischen dem Stößelelement und dem Betätigungsbolzen ein unter Druckspannung stehender zweiter Kraftspeicher, insbesondere eine unter Druckspannung stehende zweite Schraubenfeder. Diese Anordnung dient dem elastischen Längenausgleich der Stößelmittel, wenn der Betätiger bereits an seinem Anschlag anliegt, aber die Stößelmittel weiterhin eine von außerhalb der Vorrichtung aufgebrachte Betätigungskraft erfahren.According to claim 7 acts between the plunger element and the Actuating bolt one second under pressure Energy storage, in particular a second one under pressure Coil spring. This arrangement is used for elastic length compensation the ram means when the actuator is already at its stop, but the plunger means continues to be from outside the device experienced applied operating force.

Gemäß Anspruch 8 ist sichergestellt, daß beim Auslenken des zweiten Kraftspeichers die auf die Vorrichtung einwirkende Kraft größer ist als die Kraft, die zum Betätigen des Schaltelements erforderlich ist. Dadurch ist sichergestellt, daß die in dem zweiten Kraftspeicher speicherbare Energie bzw. Kraft ausreicht, um die elektrische Verbindung zu schalten bzw. das Schaltglied auszulenken.According to claim 8 ensures that when deflecting the second Energy storage the force acting on the device is greater than the force required to actuate the switching element. This is ensures that the energy that can be stored in the second energy store or force is sufficient to switch the electrical connection or deflect the switching element.

Gemäß Anspruch 9 ist der Betätigungsbolzen an einem Ende in einer an einer Gewindehülse der Vorrichtung festgelegten Lochscheibe axial geführt. An seinem gegenüberliegenden Ende ist der Betätigungsbolzen in einer Haltebuchse geführt, die ihrerseits wiederum in dem Stößelelement geführt ist. Dadurch ergibt sich eine sichere und insbesondere raumsparende Führung der Stößelmittel in der Vorrichtung.According to claim 9, the actuating pin is at one end in one a threaded sleeve of the device axially fixed perforated disk. At its opposite end, the actuating pin is in one Holding bush guided, which in turn guided in the plunger element is. This results in a safe and, in particular, space-saving Guiding the tappet means in the device.

Gemäß Anspruch 10 weist die Vorrichtung einen dritten Kraftspeicher auf, der sich an der Lochscheibe abstutzt und auf die Stößelmittel einwirkt und insbesondere das Stoßelelement in einer mit einem Ende nach außerhalb der Vorrichtung hinausragenden Ausgangsposition hält. Der Überstand des Stößelelements wird durch das Zusammenwirken einer Auskragung des Stößelelements und eines ringförmigen Absatzes in der Gewindehülse definiert. Für bestimmte Anwendungsfälle weist das Stößelelement an seinem aus der Vorrichtung herausragenden Ende eine im wesentlichen halbkugelförmige Form auf, beispielsweise mittels einer in das Stößelelement eingesetzten Kugel.According to claim 10, the device has a third energy accumulator, which is supported on the perforated disc and acts on the tappet means and in particular the push element in one with one end facing outwards the starting position protruding from the device. The supernatant of the Tappet element is made by the interaction of a cantilever Tappet element and an annular shoulder in the threaded sleeve Are defined. The plunger element provides instructions for certain applications its end protruding from the device is essentially one hemispherical shape, for example by means of an in the plunger element inserted ball.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein Ausführungsbeispiel im einzelnen beschrieben ist.

Fig. 1
zeigt eine Seitenansicht eines erfindungsgemäßen Grenztasters im Querschnitt.
Further advantages, features and details of the invention emerge from the subclaims and the following description, in which an exemplary embodiment is described in detail with reference to the drawing.
Fig. 1
shows a side view of a limit switch according to the invention in cross section.

Der Grenztaster weist an einem vorderen axialen Ende ein Stößelelement 101 auf, das in einer axialen Bohrung der Gewindehülse 102 geführt ist und eine ringförmige Nut 103 zur Aufnahme eines Schmiermittels aufweist. Das Stößelelement 101 ist topfförmig ausgebildet und weist insbesondere eine ringförmige Auskragung 104 auf, die zusammen mit einer an der Gewindehülse 102 ausgebildeten ringförmigen Schulter 105 einen mechanischen Anschlag für die Bewegung des Stößelelements in Richtung auf das vordere Ende des Grenztasters bildet.The limit switch has a plunger element at a front axial end 101, which is guided in an axial bore of the threaded sleeve 102 and has an annular groove 103 for receiving a lubricant. The plunger element 101 is cup-shaped and in particular has an annular projection 104, which together with one on the Threaded sleeve 102 formed an annular shoulder 105 a mechanical stop for the movement of the plunger element in the direction forms on the front end of the limit switch.

Ein ebenfalls topfförmiger Betätigungsbolzen 106 ist mittels einer Haltebuchse 107 im Hohlraum des topfförmigen Stößelelements 101 geführt. Auch der Betätigungsbolzen 106 weist eine ringförmige Auskragung auf, die zusammen mit einer ringförmigen Schulter der Haltebuchse 107 als mechanischer Anschlag für die Bewegung des Betätigungsbolzens 106 in Richtung auf das Schaltelement 119 dient.
Das Stößelelement 101, der Betätigungsbolzen 106 und die Haltebuchse 107 sind koaxial ausgerichtet und bilden die Stößelmittel. Eine dritte Schraubenfeder 108, die sich an einem Ende an dem Stößelelement 101 oder der Haltebuchse 107 abstützt und mit ihrem anderen Ende an einer mit der Gewindehülse 102 fest verbundenen Lochscheibe 109 abstützt, hält das Stößelelement 101 federkraftbelastet in der dargestellten vorderen Anlage. Die Lochscheibe 109 dient mit ihrer zentrischen Öffnung darüber hinaus der axialen Führung des Betätigungsbolzens 106.
A likewise pot-shaped actuating pin 106 is guided in the cavity of the pot-shaped plunger element 101 by means of a holding bush 107. The actuating bolt 106 also has an annular projection which, together with an annular shoulder of the holding bush 107, serves as a mechanical stop for the movement of the actuating bolt 106 in the direction of the switching element 119.
The tappet element 101, the actuating bolt 106 and the holding bush 107 are aligned coaxially and form the tappet means. A third coil spring 108, which is supported at one end on the plunger element 101 or the holding bush 107 and is supported at its other end on a perforated disk 109 which is fixedly connected to the threaded sleeve 102, holds the plunger element 101 under spring force in the front system shown. With its central opening, the perforated disk 109 also serves to axially guide the actuating bolt 106.

Zwischen dem Betätigungsbolzen 106 und dem Betätiger 110 des elektrischen Schaltelements 119 liegt eine Membran 112, die durch eine Druckscheibe 113 gegen eine dritte Schulter der Gewindehülse 102 gepreßt ist, und beispielsweise aus Kunststoff, Gummi oder Stahl besteht. Die Kraft auf die Drehscheibe 113 wird durch Einschrauben einer Klemmbuchse 114 in die Gewindehülse 102 bereitgestellt. Die Hülse 115 schützt das Schaltelement 119 vor Feuchtigkeit, Verunreinigung und/oder mechanischer Beschädigung und bildet einen Anschlußraum für eine nicht dargestellte Leitung oder zur Aufnahme eines Steckverbinders.
Der Hohlraum kann mit Gießharz ausgegossen werden.
Between the actuating pin 106 and the actuator 110 of the electrical switching element 119 is a membrane 112, which is pressed by a pressure plate 113 against a third shoulder of the threaded sleeve 102, and is made of plastic, rubber or steel, for example. The force on the turntable 113 is provided by screwing a clamping bush 114 into the threaded sleeve 102. The sleeve 115 protects the switching element 119 from moisture, contamination and / or mechanical damage and forms a connection space for a line (not shown) or for receiving a plug connector.
The cavity can be filled with resin.

Der auf der dem Betätigungsbolzen 106 gegenüberliegenden Seite der Membran 112 anliegende Betätiger 110 weist einen topfförmigen Abschnitt auf, der ein Gewindeteil 111 des Schaltelements 119 umfänglich umfaßt. Eine radial zwischen dem topfförmigen Abschnitt und dem Gewindeteil 111 des Schaltelements 119 angeordnete, sich an dem Betätiger 110 und der Klemmbuchse 114 abstützende und unter Druckspannung stehende erste Schraubenfeder 116 sorgt für eine federkraftbelastete und stete Anlage des Betätigers 110 an der Membran 112 und damit für eine stete Kopplung des Betätigers 110 mit dem Betätigungsbolzen 106 und damit mit dem Stößelelement 101.The on the opposite side of the actuating pin 106 Actuator 110 abutting membrane 112 has a cup-shaped section which comprises a threaded part 111 of the switching element 119 circumferentially. A radial between the cup-shaped section and the threaded part 111 of the switching element 119 arranged on the actuator 110 and the clamping bush 114 supporting and under pressure first coil spring 116 ensures a spring-loaded and constant system of the actuator 110 on the membrane 112 and thus for a constant coupling of the actuator 110 with the actuating pin 106 and thus with the Tappet element 101.

In den einander zugewandten Hohlräumen des Betätigungsbolzens 106 und des Stößelelements 101 ist eine unter Druckspannung stehende zweite Schraubenfeder 118 angeordnet. Die Kraft zur Auslenkung der zweiten Schraubenfeder 118 ist größer als die Summe der beiden Kräfte zur Auslenkung der ersten Schraubenfeder 116 und des Schaltelements 119 bzw. des Stellgliedes 120. Das Gewindeteil 111 des Schaltelements 119 dient der Aufnahme und Führung des Stellgliedes 120, das an seinem vom Betätiger 110 entfernten Abschnitt mindestens einen elektrischen Kontakt der zu schaltenden Verbindung trägt. Die Klemmbuchse 114 weist einen ersten ringförmigen Absatz 117 auf, der einen mechanischen Anschlag für den topfförmigen Abschnitt des Betätigers 110 bildet. Radial zwischen dem Schaltelement 119 und dem ersten Absatz 117 ist ein zweiter, vorzugsweise ringförmiger Absatz angeordnet, an dem ein erstes Ende der ersten Schraubenfeder 116 in Anlage ist, deren zweites Ende ebenso wie das Stellglied 120 des Schaltelements 119 an der Bodenflache des Betätigers 110 in Anlage ist. Die elektrischen Leitungen werden an den Anschlussen 121 des Schaltelements 119 angeschlossen und aus dem Grenztaster nach unten herausgefuhrt. Die Gesamtlange des Grenztasters beträgt 40 mm. Das Kopfteil besitzt ein M 12 × 1 Außengewinde.In the mutually facing cavities of the actuating pin 106 and the plunger element 101 is a second one under pressure Coil spring 118 arranged. The power to deflect the second Coil spring 118 is greater than the sum of the two forces Deflection of the first coil spring 116 and the switching element 119 or the actuator 120. The threaded part 111 of the switching element 119 serves to receive and guide the actuator 120, which is on its from Actuator 110 removed portion at least one electrical contact of the connection to be switched. The clamping bush 114 has one first annular shoulder 117 on which a mechanical stop for forms the cup-shaped section of the actuator 110. Radial between that Switching element 119 and the first paragraph 117 is a second, preferably arranged annular shoulder on which a first end of the first Coil spring 116 is in plant, the second end as well the actuator 120 of the switching element 119 on the bottom surface of the Actuator 110 is in plant. The electrical lines are connected to the Connections 121 of the switching element 119 connected and from the Limit switch led out downwards. The total length of the limit switch is 40 mm. The headboard has an M 12 × 1 external thread.

Claims (10)

  1. Device for switching an electrical connection, in particular a limit switch, comprising an electrical switching element (119) and a plunger means (101, 106) which can be actuated from outside the device and is coupled axially to an actuator (110) for the electrical switching element (119), which actuator (110) is not accessible from outside the device, in which a first energy store, in particular, a first helical spring (116) subject to compressive stress, prestresses the actuator (110) towards the plunger means (101, 106), characterized in that the first energy store at least partially surrounds the switching element (119).
  2. Device according to Claim 1, characterized in that the actuator (110) comprises a pot-shaped portion at least partially surrounding the switching element (119), and in that the device comprises a limit stop for the axial movement of the actuator (110), with which limit stop the pot-shaped portion of the actuator (110) is in abutment in an end position.
  3. Device according to Claim 2, characterized in that the electrical switching element (119) is secured in a clamping bush (114), in particular, can be screwed therein.
  4. Device according to Claim 3, characterized in that the clamping bush (114) forms the mechanical limit stop for the movement of the actuator (110), in particular, comprises a first annular shoulder (117) as limit stop for the pot-shaped portion of the actuator (110).
  5. Device according to Claim 4, characterized in that the clamping bush (114) comprises a second annular shoulder which is arranged radially between the switching element (119) and the first shoulder (117), and with which a first end of the first energy store, in particular of the first helical spring (116), is in abutment, the second end of the helical spring (116) being in abutment with the actuator (110).
  6. Device according to any one of Claims 1 to 5, characterized in that the plunger means (101, 106) and the actuator (110) are disposed adjacent opposite sides of a diaphragm (112) which is disposed between them and seals from the exterior a switching region of the device housing the switching element (119).
  7. Device according to any one of Claims 1 to 6, characterized in that the plunger means (101, 106) includes a pot-shaped plunger element (101) which can be actuated from outside the device and an actuating pin (106) which is also pot-shaped and is coupled to the actuator (110), a second energy store, in particular a second helical spring (118) subject to compressive stress, being arranged in the cylindrical cavities of the plunger element (101) and of the actuating pin (106), which cavities are aligned axially and open towards one another.
  8. Device according to Claim 7, characterized in that the force for bringing about excursion of the second energy store is greater than the sum of the forces for actuating a final control element (120) of the switch element (119) disposed adjacent the actuator (110) and switching the electrical connection, and for bringing about excursion of. the first energy store.
  9. Device according to Claim 7 or Claim 8, characterized in that the actuating pin (106) is guided axially in a pierced disk (109) fixed to a threaded bush (102).
  10. Device according to Claim 9, characterized in that the plunger element (101) is held in a starting position defined by the cooperation of a projection (104) of the plunger element (101) and of an annular shoulder of the threaded bush (102) by means of a third energy store, in particular a third helical spring (108) acting on the plunger element (101) and supported on the pierced disk (109).
EP99907536A 1998-02-26 1999-02-11 Device for switching an electrical connection, especially a limit switch Expired - Lifetime EP1058938B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19808060A DE19808060A1 (en) 1998-02-26 1998-02-26 Limit switch
DE19808060 1998-02-26
PCT/EP1999/000887 WO1999044211A1 (en) 1998-02-26 1999-02-11 Device for switching an electrical connection, especially a limit switch

Publications (2)

Publication Number Publication Date
EP1058938A1 EP1058938A1 (en) 2000-12-13
EP1058938B1 true EP1058938B1 (en) 2002-05-22

Family

ID=7858961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99907536A Expired - Lifetime EP1058938B1 (en) 1998-02-26 1999-02-11 Device for switching an electrical connection, especially a limit switch

Country Status (4)

Country Link
EP (1) EP1058938B1 (en)
AT (1) ATE218007T1 (en)
DE (2) DE19808060A1 (en)
WO (1) WO1999044211A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2800506B1 (en) * 1999-10-29 2002-01-04 Crouzet Automatismes DEVICE FOR AMPLIFYING THE MOVEMENT OF A MANEUVER BUTTON OF A SWITCH
GB0020983D0 (en) * 2000-08-26 2000-10-11 Honeywell Control Syst Limit switch
DE102017113416B3 (en) 2017-06-19 2018-06-07 Fixtest Prüfmittelbau GmbH MICROSWITCH AND TEST SYSTEM

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1882059U (en) * 1963-09-07 1963-11-07 Euchner & Co K G BUILT-IN LIMIT SWITCH.
FR2613119A1 (en) * 1987-03-27 1988-09-30 Jaeger ELECTRICAL POSITION SWITCH

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756300A (en) * 1953-11-30 1956-07-24 Arthur J Thiberville Lock controlled switch
DE1588052C3 (en) * 1967-05-18 1975-04-10 Robert Bosch Gmbh, 7000 Stuttgart Snap-action switching mechanism, in particular magnetic snap-action switching mechanism for an electrical limit switch
DE7712593U1 (en) * 1977-04-21 1978-10-12 Gebhard Balluff, Fabrik Feinmechanischer Erzeugnisse, 7303 Neuhausen Tappet switchgear
DE8108010U1 (en) * 1981-03-27 1981-10-22 Sartorius GmbH, 3400 Göttingen Housing made of almost transparent plastic for the filtration or concentration of liquid media
JPS59109028U (en) * 1983-01-12 1984-07-23 オムロン株式会社 limit switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1882059U (en) * 1963-09-07 1963-11-07 Euchner & Co K G BUILT-IN LIMIT SWITCH.
FR2613119A1 (en) * 1987-03-27 1988-09-30 Jaeger ELECTRICAL POSITION SWITCH

Also Published As

Publication number Publication date
DE19808060A1 (en) 1999-09-09
EP1058938A1 (en) 2000-12-13
ATE218007T1 (en) 2002-06-15
WO1999044211A1 (en) 1999-09-02
DE59901498D1 (en) 2002-06-27

Similar Documents

Publication Publication Date Title
EP1082567A1 (en) Piezoelectric actuator
DE1490840B2 (en) ELECTRIC PLUG-IN COUPLING FOR CONNECTING COAXIAL CABLES
WO2004068068A1 (en) Probe for a coordinate measuring device
EP3419034B1 (en) Microswitch and test system
AT407577B (en) SPARK PLUG WITH A PRESSURE MEASURING DEVICE
EP1058938B1 (en) Device for switching an electrical connection, especially a limit switch
EP1608940B1 (en) Device for the detection of an actuation force of a brake pedal and brake system
WO2004085837A1 (en) Attachable rod ignition coil
DE19509931A1 (en) Shock load sensor
DE10104438B4 (en) Multipolar safety switch with a pressure sensor
DE4409351A1 (en) Device for monitoring the piston stroke of a pneumatically actuated brake cylinder
EP0487938B1 (en) Vacuum brake booster
DE10145900A1 (en) Contact connection of gas-insulated panels in switchgear
DE202008013956U1 (en) Connection device for fine-wire conductors
EP3625813A1 (en) Contact press-on assembly
DE19818838C2 (en) Pressure switch
DE2164652A1 (en) ELECTRIC SWITCH
DE3909321C2 (en)
EP2490306A2 (en) Crimping tool
EP0449058B1 (en) Electric snap-action switch, particularly micro-switch
DE202010013617U1 (en) High-frequency test probe
EP3602694A1 (en) Switchgear-contacting device
EP1445784A1 (en) Microswitch with integrated leverage
EP1091141B1 (en) Vibration damper
DE202006003139U1 (en) Key switch with a device for key monitoring

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000217

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE LI

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20010919

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

REF Corresponds to:

Ref document number: 218007

Country of ref document: AT

Date of ref document: 20020615

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ISLER & PEDRAZZINI AG

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59901498

Country of ref document: DE

Date of ref document: 20020627

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030225

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: ISLER & PEDRAZZINI AG;POSTFACH 1772;8027 ZUERICH (CH)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20090114

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20090218

Year of fee payment: 11

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100211

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150212

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59901498

Country of ref document: DE

Representative=s name: RUCKH, RAINER, DIPL.-PHYS. DR.RER.NAT., DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59901498

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160901