EP1870914A2 - Interrupteur de fin de course doté d'un élément de commutation - Google Patents

Interrupteur de fin de course doté d'un élément de commutation Download PDF

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Publication number
EP1870914A2
EP1870914A2 EP07011743A EP07011743A EP1870914A2 EP 1870914 A2 EP1870914 A2 EP 1870914A2 EP 07011743 A EP07011743 A EP 07011743A EP 07011743 A EP07011743 A EP 07011743A EP 1870914 A2 EP1870914 A2 EP 1870914A2
Authority
EP
European Patent Office
Prior art keywords
limit switch
actuating
actuating part
plunger
switch according
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Withdrawn
Application number
EP07011743A
Other languages
German (de)
English (en)
Inventor
Jürgen Zimmermann
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.)
Zimm Maschinenelemente and Co GmbH
Original Assignee
Zimm Maschinenelemente and Co GmbH
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 Zimm Maschinenelemente and Co GmbH filed Critical Zimm Maschinenelemente and Co GmbH
Publication of EP1870914A2 publication Critical patent/EP1870914A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch 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. for a door switch, a limit switch, a floor-levelling switch of a lift

Definitions

  • the invention relates to a limit switch with a switching part, which has an axially displaceable switch plunger for switching at least one switch contact, and with an actuating part, of which the switch plunger is displaceable by a transverse to the longitudinal axis of the switch plunger to an actuating plunger of the actuating part triggering trigger part.
  • Such limit switches are used for example in Spindelhubgetrieben, which serve to position a load.
  • the limit switches stop the movement of the Spindelhubgetriebes at the intended end positions.
  • a release part is attached to that end of the spindle, which is opposite to the operating end of the spindle.
  • This release member adjusts together with the spindle in the axial direction.
  • the direction of movement of the trigger member is perpendicular to the longitudinal axis of an axially displaceable switching plunger of the limit switch, of which at least one switching contact of the limit switch is switched.
  • the limit switch further comprises an actuating part with an actuating plunger on which a roller is rotatably mounted.
  • the role of the actuating plunger cooperates with an inclined surface of the trigger member through which the actuating plunger is displaced in the axial direction and thereby displaces the switching plunger of the limit switch.
  • limit switches are used in which after a predetermined displacement of the switch plunger, a first switching point is reached (the so-called "jump contact”) and after a further displacement, a second switching point is reached (the so-called “forced opening”). The second switching point must be reached reliably when starting the release part, the switch plunger may be moved only slightly beyond this second switching point addition, so as not to damage the switching part.
  • the object of the invention is to provide a limit switch of the type mentioned, in which the positioning of the limit switch relative to the trigger member may have a greater tolerance. According to the invention, this is achieved by a limit switch with the features of claim 1.
  • the inventive construction a larger switching reserve is possible, whereby the tolerances for the mutual placement of the limit switch and the release part can be larger.
  • Sloping surfaces of the trigger part are not required in an inventive design of the limit switch.
  • the control surface advantageously for each pivoting direction has a portion with a circular arc-shaped contour on, the center of the circle is in each case on that pivot axis of the operating part about which the actuating member is pivoted for this pivoting direction.
  • This pivot axis is arranged on the side of the extended longitudinal axis of the switch plunger, which is opposite to the associated circular arc-shaped portion of the control surface.
  • the limit switch has a switching part, which is formed in a conventional manner and does not need to be explained in detail.
  • Such switching parts are commercially available and are used in limit switches, for example in Spindelhubgetrieben, in large numbers.
  • the switching part has an axially displaceable switching plunger 2. This serves to switch a switching contact 3, which is shown schematically in FIGS. 9 to 12.
  • a switching contact 3 which is shown schematically in FIGS. 9 to 12.
  • two switching points are achieved. If the first switching point is reached when the switching plunger 2 is pressed in (see Fig. 10), then the switching contact 3 is actuated by a spring 4. This switching point is conventionally also referred to as "jump contact”. On the other hand, when the switch plunger 2 is pushed further in, a second switch point is reached (compare FIGS. 11 and 12). The switching contact 3 is actuated directly by the switching plunger 2 at this, usually referred to as "positive opening" switching point. As already mentioned, the parts arranged within the switching part 3 are indicated only schematically in FIGS. 9 to 12.
  • the limit switch further comprises an actuating part 5. This is used in an actuation of the limit switch by a trigger member 6 for axial displacement of the switch plunger 2 with the interposition of a transmission part. 7
  • the actuating part 5 is mounted in a bearing part 8, wherein it is pivotable about pivot axes 9, 10, starting from a basic position, which is shown in FIGS. 1, 5, 6 and 9. In a first pivoting direction, it is pivotable about the first pivot axis 9 and in an opposite second pivoting direction about the second pivot axis 10.
  • a portion of the actuating part 5 forms an actuating plunger 11, which serves to actuate the limit switch by the trigger member 6, wherein the trigger member 6 moves transversely, in particular at right angles, to the longitudinal axis 12 of the switch plunger 2 and in this direction of movement 13 in the operation of the limit switch to the Actuating plunger 11 starts.
  • the pivoting of the actuating part 5 occurs either about the first pivot axis 9 or about the second pivot axis 10.
  • the pivot axes 9, 10 are on both sides of the elongated longitudinal axis 12 of the switch plunger 2 and are spaced therefrom, preferably the same width.
  • the pivot axes 9, 10 are favorably aligned at right angles to the longitudinal axis 12 of the switch plunger 2.
  • the direction of movement 13 of the trigger part 6 is aligned at right angles to the pivot axes 9, 10.
  • first and second link guides are provided for pivotable mounting of the actuating part 5 about the first pivot axis 9 and about the second pivot axis 10 .
  • the bearing part 8 first and second links 14, 15, in which first and second pins 16, 17 of the operating part 5 are guided.
  • the scenes 14, 15 are in this case each circular arc-shaped, wherein the circle center of the first link 14 on the first pivot axis 9 and the circle center of the second link 15 is located on the second pivot axis 10.
  • the second pin 17 is located at the location of the first pivot axis 9, i. the longitudinal axis of the second pin 17 coincides with the first pivot axis 9, and the first pin 16 is located at the location of the second pivot axis 10, i. the longitudinal axis of the first pin 16 coincides with the second pivot axis 10.
  • the actuating member 5 is pivoted in the first pivoting direction about the first pivot axis 9, the second pin 17 remains at the location of the first pivot axis 9 and the first pin 16 moves along the first link 14.
  • the operating part. 5 is pivoted in the opposite pivoting direction about the second pivot axis 9, the first pin 16 remains at the location of the second pivot axis 10 and the second pin 17 moves along the second link 15th
  • the control extension 18 has a control surface, which interacts with the transmission part 7.
  • This control surface comprises a central portion with a recess 19, on which the transmission part 7 rests in the non-pivoted basic position of the actuating part 5.
  • the extended longitudinal axis 12 of the switch plunger 2 extends in the basic position of the actuating part 5 through the lowest point of the recess 19th
  • the first portion 20 cooperates with the transmission part 7 at a sufficiently large pivoting of the actuating part 5 about the first pivot axis 9 and the second portion 21 cooperates with the transmission part 7 at a sufficiently large pivoting of the actuating part 5 about the second pivot axis 10.
  • the circle center of the circular arc-shaped contour of the first section 20 is located on the first pivot axis 9, which in the basic position of the actuating part 5 on the first section 20 opposite side of the elongated longitudinal axis 12 of the switch plunger 2 is.
  • the circle center of the circular arc-shaped contour of the second section 21 is located on the second pivot axis 10, which is arranged in the basic position of the actuating part 5 on the opposite side of the second section 21 of the extended longitudinal axis 12 of the switch plunger 2.
  • the sections 20, 21 are each formed by a generatrix, which is displaced in a circular arc about the longitudinal axis of the respective opposite pin 16, 17.
  • this generatrix is a straight line which is parallel to the longitudinal axes of the pins 16, 17.
  • the transmission part 7 is displaceably guided by the bearing part 8 in the direction of the longitudinal axis 12 of the switch plunger 2, namely from the edge of a recess in a top wall 24 of the bearing part 8.
  • the bearing part 8 is in the form of a rolling element, for example in the form of a ball or a Roller.
  • a roller 25 may be rotatably mounted, which cooperates with the triggering part 6.
  • the first slide 14 and the second slide 15 are each formed in the embodiment shown by two circular arc-shaped recesses in a front wall 26 and a rear wall 27 of the bearing part 8.
  • the recess in the rear wall 27 can be formed as a circular arc-shaped elongated hole and the respective recess in the front wall 26 are formed by a circular arc-shaped recess in this projecting from both sides of the actuating part 5 sections (not visible in the figures).
  • the actuating part 5 has four extensions in the illustrated embodiment. On opposite sides there are first and second extensions 28, 29, on which the first and second pins 16, 17 are arranged (see Fig. 4). In directions perpendicular to the directions in which the first and second extensions 28, 29 extend, an extension that forms the actuating tappet 11 and the control extension 18 extend.
  • a spring 30 which acts on the operating part 5 in its unverschwenkte basic position.
  • This spring 30 is in the form of a helical spring with spring arms 31, 32 protruding on opposite sides. The central portion of the spring 30 is disposed on a pin 33 of the bearing part 8 and the two spring arms 31, 32 abut against the first and second pins 16, 17 of the actuating part 5.
  • the switching part 1 and the bearing part 8 are connected to each other in the illustrated embodiment by a connecting plate 34 to which they are both screwed by means of screws 35, 36. Furthermore, a mounting plate 37 is provided, which serves to fasten the limit switch to a desired part. In the illustrated embodiment, the bearing part 8 is screwed to the mounting plate 37 by means of screws 38. To secure the limit switch to a desired part are screws 39 which pass through holes in the mounting plate 37.
  • the actuating plunger 11 projects beyond the remaining parts of the limit switch.
  • recesses 40, 41 are provided in the bearing part 8 and in the mounting plate 37 for the passage of the actuating plunger 11 for this purpose.
  • the mounting plate 37 could for example also be integrally formed with the bearing part 8.
  • Fig. 5 shows an exemplary application for a limit switch according to the invention.
  • two limit switches according to the invention are mounted on a guide tube 42 of a screw jack 43.
  • the screw jack has a spindle 44 which can be adjusted in the axial direction.
  • the Spindelhubgetriebe has within the gear housing 45 in a conventional manner a rotatably but axially non-displaceably mounted spindle nut which is arranged on the external thread of the spindle 44 and by rotation of a drive shaft 46 is set in rotation.
  • a worm is mounted on the drive shaft 46 within the gear housing 45, which cooperates with a worm gear of the spindle nut.
  • Such screw jacks are known.
  • the one end 47 of the spindle 44 serves to connect to the load to be positioned.
  • a trigger part 6 is attached, through which the limit switches are actuated.
  • This trigger member 6 is used in the embodiment shown at the same time as rotation for the spindle 44 by its displaceable but non-rotatable guide in the guide tube 42nd
  • the limit switches are screwed with their mounting plates 37 on the guide tube 42, wherein in the guide tube 42 openings 49 are formed for the passage of the actuating plunger 11.
  • the actuating part 5 In the switching position according to FIG. 9, the actuating part 5 is in its basic position, in which the longitudinal axes of the pins 16, 17 coincide with the pivot axes 9, 10.
  • the switch plunger 2 is in its most pushed out position.
  • the transmission part 7 is preferably located at the end of the switch plunger 2.
  • the triggering part 6 runs straight on to the actuating plunger 11.
  • the trigger member 6 has moved in its direction of movement 13, whereby it has pivoted the operating part 5 about its first pivot axis 9 relative to the basic position.
  • the transmission part 7 from its lowest position in the recess 19 has been pushed out and has moved in the direction of the longitudinal axis 12 of the switch plunger 2 against this and in this case moved against the force of the spring 4.
  • the first switching point of the switching part 1 is just reached, in which the switching contact 3 is opened.
  • a position is shown, in which the comb 22 in the vicinity of the extended longitudinal axis 12 of the switch plunger 2 is located.
  • the transmission part 7 is further displaced against the switch plunger 2 with displacement thereof.
  • the second switching point of the switching part 1 is reached.
  • the distance a between the triggering part 6 and the guide tube 42 can thus also be significantly greater than illustrated. wherein nevertheless the second switching point is reached, although the maximum pivoting of the actuating part 5 by the trigger part 6 is lower. Also, the distance a may be smaller than shown without damaging the limit switch, as shown in FIG. 12. The distance a can be varied in a relatively large range, in which the second switching point is achieved and without causing damage to the limit switch. This is made possible by the large switching reserve of the limit switch according to the invention. As a result, the installation of such limit switches is much easier, since the distances a can vary as a result of manufacturing tolerances.
  • the limit switch according to the invention for release parts 6 can be used, which can start from both sides of the actuating plunger 11, wherein they move transversely to the longitudinal axis 12 of the switch plunger 2.
  • the actuating member 5 is pivoted in an analogous manner about the second pivot axis 10.
  • the switching part 1 has a switching contact with two switching points.
  • the switching part 1 may also have only a single switching point. Also in this case, a larger switching reserve can be achieved by the invention.
  • the switching part 1 may also have more than one switching contact, which are actuated at one or at different switching points.

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  • Push-Button Switches (AREA)
EP07011743A 2006-06-22 2007-06-15 Interrupteur de fin de course doté d'un élément de commutation Withdrawn EP1870914A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT10502006 2006-06-22

Publications (1)

Publication Number Publication Date
EP1870914A2 true EP1870914A2 (fr) 2007-12-26

Family

ID=38521206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07011743A Withdrawn EP1870914A2 (fr) 2006-06-22 2007-06-15 Interrupteur de fin de course doté d'un élément de commutation

Country Status (2)

Country Link
US (1) US20070295585A1 (fr)
EP (1) EP1870914A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009117752A1 (fr) * 2008-03-27 2009-10-01 Zimmermann, Jürgen Rupteur, en particulier rupteur de fin de course
EP2141112A1 (fr) 2008-07-02 2010-01-06 Jürgen Zimmermann Dispositif de réglage destiné à positionner une charge

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU192341U1 (ru) * 2019-05-16 2019-09-13 Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации Управляющий узел путевого выключателя

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100824A (en) * 1960-05-31 1963-08-13 Cutler Hammer Inc Limit switch
FR1453814A (fr) * 1964-11-06 1966-07-22 Telemecanique Electrique Appareil de commutation dit fin de course
US3867593A (en) * 1973-11-07 1975-02-18 Diebold Inc Pneumatic tube carrier detector assembly with cam operated microswitch and resilient finger heeler means
DE3231158C2 (de) * 1982-08-21 1985-11-14 Dr. Johannes Heidenhain Gmbh, 8225 Traunreut Mehrkoordinaten-Tastkopf
US4701582A (en) * 1985-02-22 1987-10-20 Omron Tateisi Electronics Co. Plunger sensing switch
US4734549A (en) * 1985-11-25 1988-03-29 Rin Ei Seiki Kabushiki Kaisha Touch sensor
FR2626363B1 (fr) * 1988-01-27 1993-02-19 Telemecanique Electrique Dispositif pour detecter au moins une variable relative au deplacement d'un mobile
JP3036052B2 (ja) * 1990-11-01 2000-04-24 オムロン株式会社 リミツトスイツチ
US5959272A (en) * 1997-12-23 1999-09-28 Otis Elevator Company Fail safe roller switch
FR2785985B1 (fr) * 1998-11-18 2001-02-23 Crouzet Automatismes Detecteur de position avec mecanisme d'orientation
US6065168A (en) * 1998-11-19 2000-05-23 Damron; Kenneth Jonathan Independent suspension mattress
US6671911B1 (en) * 1999-05-21 2004-01-06 Hill Engineering Continuous wave cushioned support
US6723428B1 (en) * 1999-05-27 2004-04-20 Foss Manufacturing Co., Inc. Anti-microbial fiber and fibrous products
US6145143A (en) * 1999-06-03 2000-11-14 Kinetic Concepts, Inc. Patient support systems with layered fluid support mediums
US6868569B2 (en) * 2002-02-01 2005-03-22 The Or Group, Inc. Reversed air mattress
AU2003284291A1 (en) * 2002-10-23 2004-05-13 Tcam Technologies, Inc. Smart decubitus mat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009117752A1 (fr) * 2008-03-27 2009-10-01 Zimmermann, Jürgen Rupteur, en particulier rupteur de fin de course
EP2141112A1 (fr) 2008-07-02 2010-01-06 Jürgen Zimmermann Dispositif de réglage destiné à positionner une charge

Also Published As

Publication number Publication date
US20070295585A1 (en) 2007-12-27

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