EP0678884A1 - Unité de commande d'interrupteur - Google Patents

Unité de commande d'interrupteur Download PDF

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Publication number
EP0678884A1
EP0678884A1 EP95250056A EP95250056A EP0678884A1 EP 0678884 A1 EP0678884 A1 EP 0678884A1 EP 95250056 A EP95250056 A EP 95250056A EP 95250056 A EP95250056 A EP 95250056A EP 0678884 A1 EP0678884 A1 EP 0678884A1
Authority
EP
European Patent Office
Prior art keywords
actuation unit
switch
actuating plunger
unit according
switch actuation
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Withdrawn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
EP95250056A
Other languages
German (de)
English (en)
Inventor
Wolfgang Arnold
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0678884A1 publication Critical patent/EP0678884A1/fr
Withdrawn legal-status Critical Current

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices
    • H01H15/107—Operating parts comprising cam devices actuating conventional selfcontained microswitches

Definitions

  • the invention relates to a switch actuation unit with a mechanical pushbutton device and electrical or electromechanical limit switches according to the preamble of claim 1, as well as electrical lifting axes and pressure-operated working cylinders with such a switch actuation unit.
  • a switch actuation unit of the generic type is known from DE-AS 2511603.
  • the switch actuation unit shown there is specified for a driven shaft, in particular for a threaded spindle.
  • the limit switches are arranged at the two opposite ends of the threaded spindle.
  • the threaded spindle itself has an actuating element which has a thread running on the threaded spindle.
  • this actuating element moves towards one or the other of the two possible limit positions or end positions, depending on the direction of rotation. If this is reached, the switches are actuated in the end positions and the drive of the threaded spindle is switched off.
  • a disadvantage of a device of this type is that the limit switches have to be attached directly to the limit positions and that the actuating element moves independently of the switches in the direction of one or the other switch. This makes it necessary to wire the switches accordingly. If end position actuations of this type are retrofitted, laying the cables on moving system elements on the one hand creates fastening problems and, on the other hand, there is a risk that the cables can be injured by moving system elements. In this embodiment shown in the prior art, it also follows that the switches can only be securely fastened in the end positions.
  • the invention is therefore based on the object of providing a switch actuation unit which can be easily retrofitted and is both mechanically and electrically protected.
  • the object is achieved in a switch actuation unit of the generic type by the characterizing features of claim 1.
  • the feeler device with the switches is structurally combined in such a way that the feeler device can be moved with the switches and the switch or switches can be or are actuated in at least two end or limit positions via a common actuating plunger.
  • the pushbutton device is structurally combined with the switches, and is moved together during operation, for example when used with a pressure medium cylinder, between the end positions to be queried. It is not necessary to arrange the switches at the end positions or limit positions to be queried, which also eliminates the need for a corresponding cable guide.
  • the switches and the feeler device are moved, for example, together with the slide of a pressure medium-operated working cylinder.
  • the adjustable cams a plurality of which are provided on the actuating plunger, not only result in the actuation of one of the two limit switches responsible for this end position in the end positions, but also enables a chronological key sequence to occur when an end position is approached.
  • the mechanical criterion also decides about the extent to which the corresponding actuating plunger end protrudes from the housing and thus forms the possible actuation path.
  • This actuation path is then related to the distances between the cams that can be set on the actuating plunger within the housing. For example, which is a significant advantage for pressure-operated working cylinders, a pre-end position can be determined before reaching an absolute end position, in which, for example, the piston is briefly reversed for damped braking until the absolute end position is reached.
  • actuating plunger consists of two actuating plunger elements which are telescopically pushed into one another. Here they are pressed from each other accordingly by a compression spring.
  • the two actuating plunger elements are clamped within the housing by means of snap rings which rest on the respective inner wall of the housing.
  • the respective actuating plunger element protrudes out of the same through an opening in the housing.
  • the toothed belt 50 is drawn in via the rollers 30 and 31 and guided in a correspondingly illustrated manner via the drive wheel 40.
  • a switch housing 20 is provided on the drive housing 10.
  • the switch actuation unit is arranged within this switch housing in a correspondingly illustrated manner.
  • the actuating plunger here consists of two actuating plunger elements 2 and 7. These protrude a corresponding distance from the housing 20 at the ends. For this purpose, openings 21 and 22 are provided in the switch housing 20.
  • the two actuating plunger elements are telescoped and the two actuating plunger elements are held under spring force at a working distance.
  • snap rings 23 and 24 are provided.
  • Each of the two actuating plunger elements is provided with a snap ring.
  • the two actuating plunger elements can be pushed together so far in the area of the compression spring 3 that both the upper actuating plunger element 2 and the lower actuating plunger element 7 can be pushed completely into the housing.
  • This fact can be of interest for lifting axes with extremely short strokes, in which the actuating tappet element is in any way in contact with one or both flange plates in any position of the drive housing.
  • the upper actuating plunger element 2 is further provided on the front edge with a chamfer 4, which can also take over the function of a switching cam. Furthermore, shiftable and fixable switching cams 5 and 6 are provided, which are displaceable along the lower actuating plunger element 7 and fixable thereon.
  • the two switches S1 and S2 are in terms of their Operating points arranged parallel to the operating direction of the operating plunger 2, 7. The following function results with a lifting axis of this type.
  • the lifting axis shown in Figure 1 can be used in two ways. Either the drive housing 10 is fixedly mounted and the upper and the lower flange plate move together and system elements to be moved are fastened thereon. A second mode of operation would be that the lifting axis is or are attached to the upper and / or the lower flange plate within a system or to a system, and the system element to be moved accordingly is fastened to the drive housing 10. In both cases, the same relative movements of the short-stroke axis itself arise. Here, the switching points are set such that the following three cases arise.
  • the lower flange plate 8 moves upwards and presses on the actuating plunger element 7 and the switching cam 6 on the switch S2, which, for example, gives a reference signal.
  • the lower flange plate 8 moves upwards and the pushbutton device moves over switch S2 into the end position and presses on the actuating plunger element 7 and the switching cam 5 on the switch S1, whereby, for example, an emergency stop circuit is interrupted.
  • the upper flange plate 1 travels downward and presses on the actuating plunger element 2 with the chamfer 4 likewise on the switch S1, as a result of which, for example, the emergency stop circuit is interrupted again.
  • the device can also be applied to a pressure-operated working cylinder, for example a rodless drawstring cylinder as in FIG. 2.
  • the drive housing 10 shown in FIG. 1 is analogous to the carriage 100 guided on the outside of the cylinder tube in FIG. 2.
  • the switch housing 20 is arranged in a corresponding manner on this carriage and at the end positions, i.e. Appropriate stops should be provided on the cylinder covers. Both uses, i.e. Both the use with an electric short stroke axis, as well as with a pressure cylinder operated working cylinder, result in the advantages and functionality described above in a correspondingly analogous manner.
  • the switch actuation device can thus be used universally, it can be retrofitted, and no additional cables are produced when the limit switches are cabled.
  • the switches S1 and S2 can be electrically connected to an external control unit, for example via sliding contacts arranged on the connecting element 9, to the outside.
  • the cable routing can always be designed in such a way that the cables are routed out only on the fixed part of the system, so that there is no risk of breakage or damage.

Landscapes

  • Push-Button Switches (AREA)
EP95250056A 1994-04-21 1995-03-10 Unité de commande d'interrupteur Withdrawn EP0678884A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4416066 1994-04-21
DE4416066A DE4416066A1 (de) 1994-04-21 1994-04-21 Schalterbetätigungseinheit

Publications (1)

Publication Number Publication Date
EP0678884A1 true EP0678884A1 (fr) 1995-10-25

Family

ID=6517505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250056A Withdrawn EP0678884A1 (fr) 1994-04-21 1995-03-10 Unité de commande d'interrupteur

Country Status (3)

Country Link
US (1) US5579899A (fr)
EP (1) EP0678884A1 (fr)
DE (1) DE4416066A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2933159B2 (ja) * 1996-03-18 1999-08-09 株式会社椿本チエイン 直線作動機のリミットスイッチ取付構造
DE20208683U1 (de) 2002-06-05 2002-08-14 Bernstein AG, 32457 Porta Westfalica Handbetätigbares, elektrisches Bedienungsteil
US7161100B1 (en) * 2006-04-05 2007-01-09 Chung-Hsien Hsieh Limit switch mechanism for door opening
US8039769B2 (en) * 2006-09-19 2011-10-18 Deere & Company Joystick deactivation
US7262377B1 (en) * 2006-11-23 2007-08-28 Hiwin Mikrosystem Corp. Limit switch control device for an actuator
US20080289919A1 (en) * 2007-05-21 2008-11-27 Bing-Hong Yang Limit Switch Device for an Actuator
CN121778635A (zh) * 2024-04-19 2026-04-03 兰剑智能科技(临邑)有限公司 一种撞击状态监测装置、货叉及堆垛机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968710A (en) * 1958-11-07 1961-01-17 Paramount Textile Mach Co Linear control units
US3192349A (en) * 1961-12-06 1965-06-29 Paramount Textile Mach Co Linear electrical switching control unit
US3676625A (en) * 1971-04-09 1972-07-11 Leland F Blatt Dual plunger actuated sealed combination safety and interlock switch mechanism
US5005923A (en) * 1990-03-09 1991-04-09 Spacesaver Corporation Limit switch assembly for mobile storage apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB755867A (en) * 1954-02-12 1956-08-29 Electrical Products Colne Ltd Improvements in plunger operated electric switches
DE1076228B (de) * 1958-04-24 1960-02-25 Schmersal & Co K A Elektrischer Schalter, insbesondere Endschalter
US2968284A (en) * 1959-06-10 1961-01-17 Hanna Engineering Works Electromechanical control device
CH462923A (de) * 1967-07-06 1968-09-30 Siemens Ag Albis Anordnung zur Betätigung wenigstens eines Ein-Aus-Schalters
US3937912A (en) * 1974-09-30 1976-02-10 Martin Industries, Inc. Pressure responsive circuit control unit having adjustable, interchangeable actuator components and cam-operated switch
DE2511603C2 (de) * 1975-03-17 1977-02-03 Elpatag Ag Endschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968710A (en) * 1958-11-07 1961-01-17 Paramount Textile Mach Co Linear control units
US3192349A (en) * 1961-12-06 1965-06-29 Paramount Textile Mach Co Linear electrical switching control unit
US3676625A (en) * 1971-04-09 1972-07-11 Leland F Blatt Dual plunger actuated sealed combination safety and interlock switch mechanism
US5005923A (en) * 1990-03-09 1991-04-09 Spacesaver Corporation Limit switch assembly for mobile storage apparatus

Also Published As

Publication number Publication date
US5579899A (en) 1996-12-03
DE4416066A1 (de) 1995-10-26

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