EP1058938A1 - Vorrichtung zum schalten einer elektrischen verbindung, insbesondere grenztaster - Google Patents
Vorrichtung zum schalten einer elektrischen verbindung, insbesondere grenztasterInfo
- Publication number
- EP1058938A1 EP1058938A1 EP99907536A EP99907536A EP1058938A1 EP 1058938 A1 EP1058938 A1 EP 1058938A1 EP 99907536 A EP99907536 A EP 99907536A EP 99907536 A EP99907536 A EP 99907536A EP 1058938 A1 EP1058938 A1 EP 1058938A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- switching element
- switching
- plunger
- limit switch
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
- H01H13/18—Operating 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 a 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 1 5 88 052 shows a snap-action switching mechanism for an electrical limit switch, in which the actuator is pot-shaped.
- a generic device is known from FR 26 1 3 1 19 as prior art, in which a tappet means which can be actuated from outside the device axially with one from outside the device Inaccessible actuator for an electrical switching element is coupled, a first energy store, in particular a first coil spring (1 1 6) under pressure, biasing the actuator (1 10) in the direction of the tappet means (101, 106).
- 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 biased towards the plunger means and thereby reduces the idle stroke to 3
- the first energy accumulator can be formed either by a helical spring or by another resiliently deformable element known from the prior art, for example by a plate spring, by a rubber ring or the like. It is only essential that the first energy accumulator is designed and arranged in such a way that it enables the shortest possible axial size of the device.
- the device has a stop for the axial movement of the actuator, on which the cup-shaped section of the actuator is in contact in an end position.
- a shortened axial construction of the device is possible.
- the cup-shaped section of the actuator completely receives the switching element.
- the pot-shaped section can have a coherent, partially or fully circular lateral surface or a finger-shaped structure with circumferential fingers extending in the axial direction.
- the actuator preferably has an axially central or annular elevation.
- the actuator is preferably designed in one piece and rotationally symmetrical.
- the mechanical stop formed by the device for the pot-shaped section of the actuator absorbs the high acceleration forces that may occur and forms effective protection for the electrical contacts of the 4
- the switching element is fixed, for example, to a screw-in terminal block. This simplifies positioning of the switching element within the device and, for example, setting a switching point. In addition, the assembly effort is minimized.
- the clamping bush forms the stop for the cup-shaped section of the actuator.
- the clamping bush can be set in the device in an adjustable manner, for example screwed in, the stop or the maximum travel path of the actuator can also be set.
- the first energy accumulator is arranged radially between the switching element and the cup-shaped section of the actuator and is supported on the bottom surface of the actuator, on which an actuator of the switching element is also in contact.
- the radial and axial size of the device can be reduced to a minimum.
- the first energy accumulator could also encompass the cup-shaped section of the actuator and be supported, for example, on an annular shoulder of the actuator.
- a membrane for example a rubber membrane, which dampens the acceleration forces and in particular seals against contamination by dust, abrasion and / or moisture in the switching space of the device receiving the switching element 5 serves the part of the device which receives the tappet means and is generally not hermetically sealed with respect to the outside of the device.
- the actuating pin is axially guided at one end in a perforated disk fixed to a threaded sleeve of the device. At its opposite end, the actuating pin is guided in a holding bush, which in turn is guided in the plunger element.
- the device has a third energy accumulator, which is supported on the perforated disk and acts on the tappet means and in particular the tappet element in one with one end facing outwards 6 of the device protrudes starting position.
- the protrusion of the plunger element is defined by the interaction of a projection of the plunger element and an annular shoulder in the threaded sleeve.
- the plunger element has an essentially hemispherical shape at its end protruding from the device, for example by means of a ball inserted into the plunger element.
- Fig. 1 shows a side view of a limit switch according to the invention in cross section.
- the limit switch has a plunger element 101 at a front axial end, 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 pot-shaped and in particular has an annular projection 104 which, together with an annular shoulder 105 formed on the threaded sleeve 102, forms a mechanical stop for the movement of the plunger element in the direction of the front end of the limit switch.
- a likewise pot-shaped actuating pin 106 is in the cavity of the pot-shaped plunger element 101 by means of a holding bush 107 7 led.
- 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 spring-loaded in the front illustrated
- the perforated disk 109 also serves to axially guide the actuating bolt 106.
- a membrane 1 12 Between the actuating pin 106 and the actuator 1 10 of the electrical switching element 1 19 is a membrane 1 12, which is pressed by a pressure plate 1 1 3 against a third shoulder of the threaded sleeve 102, and is made of plastic, rubber or steel, for example.
- the force on the turntable 1 13 is provided by screwing a clamping bush 1 14 into the threaded sleeve 102.
- the sleeve 1 1 5 protects the switching element 1 1 9 from moisture, contamination and / or mechanical damage and forms a connection space for a line, not shown, or for receiving a connector.
- the cavity can be filled with resin.
- Membrane 1 12 adjacent actuator 1 10 has a cup-shaped section which comprises a threaded part 1 1 1 of the switching element 1 19 circumferentially.
- a second helical spring 118 is placed under compressive stress.
- the force for deflecting the second coil spring 118 is greater than the sum of the two forces
- the threaded part 1 1 1 of the switching element 1 19 serves to receive and guide the actuator 120, which has at least one electrical contact on its portion removed from the actuator 1 10 switching connection carries.
- the clamping bush 1 14 has a first annular shoulder 1 1 7, which forms a mechanical stop for the pot-shaped section of the actuator 1 10.
- Radially between the switching element 1 1 9 and the first shoulder 1 1 7 is a second, preferably annular shoulder, on which a first end of the first coil spring 1 16 is in contact, the second end of which, like the actuator 120 of the switching element 1 19 the bottom surface of the actuator 1 10 is in contact.
- the electrical lines are connected to the connections 121 of the switching element 119 and led out of the limit switch downwards.
- the total length of the limit switch is 40 mm.
- the headboard has an M 12 x 1 external thread.
Landscapes
- Push-Button Switches (AREA)
- Thermally Actuated Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Relay Circuits (AREA)
- Keying Circuit Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19808060 | 1998-02-26 | ||
DE19808060A DE19808060A1 (de) | 1998-02-26 | 1998-02-26 | Grenztaster |
PCT/EP1999/000887 WO1999044211A1 (de) | 1998-02-26 | 1999-02-11 | Vorrichtung zum schalten einer elektrischen verbindung, insbesondere grenztaster |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1058938A1 true EP1058938A1 (de) | 2000-12-13 |
EP1058938B1 EP1058938B1 (de) | 2002-05-22 |
Family
ID=7858961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99907536A Expired - Lifetime EP1058938B1 (de) | 1998-02-26 | 1999-02-11 | Vorrichtung zum schalten einer elektrischen verbindung, insbesondere grenztaster |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1058938B1 (de) |
AT (1) | ATE218007T1 (de) |
DE (2) | DE19808060A1 (de) |
WO (1) | WO1999044211A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2800506B1 (fr) * | 1999-10-29 | 2002-01-04 | Crouzet Automatismes | Dispositif d'amplification du deplacement d'un bouton de manoeuvre d'un interrupteur |
GB0020983D0 (en) * | 2000-08-26 | 2000-10-11 | Honeywell Control Syst | Limit switch |
DE102017113416B3 (de) | 2017-06-19 | 2018-06-07 | Fixtest Prüfmittelbau GmbH | Mikroschalter und prüfsystem |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2756300A (en) * | 1953-11-30 | 1956-07-24 | Arthur J Thiberville | Lock controlled switch |
DE1882059U (de) * | 1963-09-07 | 1963-11-07 | Euchner & Co K G | Einbau-grenztaster. |
DE1588052C3 (de) * | 1967-05-18 | 1975-04-10 | Robert Bosch Gmbh, 7000 Stuttgart | Sprungschaltwerk, insbesondere Sprungmagnetschaltwerk für einen elektrischen Endschalter |
DE7712593U1 (de) * | 1977-04-21 | 1978-10-12 | Gebhard Balluff, Fabrik Feinmechanischer Erzeugnisse, 7303 Neuhausen | Stösselschaltgerät |
DE8108010U1 (de) * | 1981-03-27 | 1981-10-22 | Sartorius GmbH, 3400 Göttingen | Aus annähernd transparentem Kunststoff gebildetes Gehäuse für die Filtration oder Aufkonzentration flüssiger Medien |
JPS59109028U (ja) * | 1983-01-12 | 1984-07-23 | オムロン株式会社 | リミツトスイツチ |
FR2613119A1 (fr) * | 1987-03-27 | 1988-09-30 | Jaeger | Contacteur electrique de position |
-
1998
- 1998-02-26 DE DE19808060A patent/DE19808060A1/de not_active Withdrawn
-
1999
- 1999-02-11 WO PCT/EP1999/000887 patent/WO1999044211A1/de active IP Right Grant
- 1999-02-11 EP EP99907536A patent/EP1058938B1/de not_active Expired - Lifetime
- 1999-02-11 DE DE59901498T patent/DE59901498D1/de not_active Expired - Lifetime
- 1999-02-11 AT AT99907536T patent/ATE218007T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9944211A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59901498D1 (de) | 2002-06-27 |
DE19808060A1 (de) | 1999-09-09 |
WO1999044211A1 (de) | 1999-09-02 |
ATE218007T1 (de) | 2002-06-15 |
EP1058938B1 (de) | 2002-05-22 |
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