EP0954000A2 - Interrupteur à pression - Google Patents

Interrupteur à pression Download PDF

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Publication number
EP0954000A2
EP0954000A2 EP99102978A EP99102978A EP0954000A2 EP 0954000 A2 EP0954000 A2 EP 0954000A2 EP 99102978 A EP99102978 A EP 99102978A EP 99102978 A EP99102978 A EP 99102978A EP 0954000 A2 EP0954000 A2 EP 0954000A2
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure switch
switch according
spring
contacts
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Withdrawn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
EP99102978A
Other languages
German (de)
English (en)
Other versions
EP0954000A3 (fr
Inventor
Roland Schempp
Achim Weirowski-Herz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0954000A2 publication Critical patent/EP0954000A2/fr
Publication of EP0954000A3 publication Critical patent/EP0954000A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/38—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by piston and cylinder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs

Definitions

  • the invention is based on a pressure switch the genus of claim 1.
  • Be pressure switches for example for the control of pressure fluid operated Systems used and have a housing with a cylinder in which a pressurizable piston can be moved is led. The piston movement is controlled by a switching element detected and converted into an electrical signal.
  • Switching element can be a mechanical one for this Switch are used, the rear derailleur with End position contacts, which is dependent on Pressure on the piston are actuated by a center contact.
  • a pressure switch with the characteristic Features of claim 1 have the advantage of being Rear derailleur with almost unchanged external dimensions builds relatively robust and a long service life reliable function due to possible higher Has contact forces.
  • the rear derailleur according to the invention is less sensitive to contact wear and to unavoidable switching point overflows. An expensive one Adjustment of the rear derailleur on the housing of the pressure switch therefore not necessary.
  • the rear derailleur includes in particular Means a in the case of switching Relative movement between those interacting with each other Create contact areas. The contact surfaces clean themselves thereby automatically and prevent the formation of electrically insulating layers. Further advantages or advantageous embodiments of the invention result from the dependent claims and the description.
  • FIG. 1 shows a fully assembled Longitudinal pressure switch.
  • Fig. 2 that is Switchgear according to the invention in the pressure switch built-in electrical switch in top view shown.
  • the pressure switch 10 shown in FIG. 1 has a housing 12, which exemplarily consists of a base body 14 and a screwed cuboid control block 16.
  • the base body 14 is a cylindrical hollow profile executed, which on its facing away from the control block 16 End is provided with an internal thread 18.
  • Internal thread 18 is a solid sealing plug 20 screwed in.
  • the plug 20 is at his outside facing end face for assembly and adjustment reasons provided with a hexagon socket 24.
  • a recess 26 is provided in the one in the assembled state one in a radial Threaded bore 28 of the base body 14 arranged Grub screw 30 engages around the plug 20 to be fixed in place on the base body 14.
  • the pressure chamber 50 is also Pressure medium supplied.
  • the piston 46 is thereby a first Axial force in the direction of the base body 14 issued. This first axial force acts on the preload of the Compression spring 36 counteracting second axial force. If the pressure in the pressure medium exceeds one of these Preload of the compression spring 36 determined pressure threshold, the piston 46 and the piston connected to it move Spring plate 38 in the direction of the base body 14 until the first axial force and the second axial force again Balance, or until the spring plate 38 on its mechanical end stop.
  • the switching mechanism 62 is in a space 72 of the switch 60 arranged, which is formed in the region of the federal government 64.
  • the collar 64 is in one piece on one Fastening base 66 formed. The latter points through receiving holes 74 for fasteners and an annular sealing element 75.
  • Exemplary the collar 64 has a circular shape over large sections Outer contour with a flat 76.
  • the switch 60 is thereby form-fitting and secured against twisting in a corresponding receiving opening 58 on the housing 12 (Fig. 1) can be anchored.
  • the space 72 of the switch 60 is normally contrary to the representation in Figure 2 by means of closed a lid. To accommodate this cover are Recordings 78 available on collar 64.
  • This seesaw 84 is pivotally mounted on one side on a bearing block 86.
  • the rocker 84 is a stamped / bent part, its free end located away from the deposit two vertically one behind the other in the drawing plane has angled extensions 88. These extensions are 88 provided with notches 90 on which a multiple cranked and slotted in sections at one end Center contact 92 with the edges of its first ends supports.
  • This center contact 92 consists of electrical conductive material with spring properties. That the Offset opposite second end of the center contact 92 is on its top and bottom with an electrical contact 94.
  • a tension spring 96 designed as a spiral spring hooked, the second end of which is fixed to the bearing block 86 is, so that the tension spring 96 is under tension.
  • the force of the tension spring 96 thus acts via the center contact 92 on the rocker 84 and presses it into the shown rest position against the actuating plunger 70th
  • This switching mechanism 62 is electrically contacted usually such that the bearing block 86 with the positive pole a voltage source is connected, so that Potential on the rocker 84 and the center contact 92 on forwarded one of the two end position contacts 98, 100 becomes.
  • the usually metallic housing 12 of the Pressure switch 10 is for security reasons with the Ground connection of the voltage source connected.
  • the switching operation of the switching mechanism 62 is as follows explained. In the switching position, not shown, acts on the actuating plunger 70 one of the spring plates 38 generated compressive force that the rocker 84 in the direction of Bearing block 86 deflects. The point P at which the force of the Tension spring 36 is introduced into the rocker 84 approaches thereby the line of action W of the tension spring 96. Once this Point P exceeds the line of action W, leads Center contact 92 a snap movement, due to which the Contact 94 to the second person who has not yet been contacted End position contact 100 switches. Before or after switching of the center contact 92 takes place in addition to the switching movement one parallel to the contact area of each other interacting contacts 94 and 98 or 94 and 100 progressive relative movement instead. This relative movement causes the contact surfaces to be cleaned so that none the function of the derailleur 62 interfering insulating Can form layers.
  • the pressure switch 10 described both for pneumatic as well as hydraulic applications suitable is. It is also possible to use this pressure switch 10 about a change in the bias of the compression spring 36 set different pressure switching thresholds. Furthermore are optimizations of the switching properties of the rear derailleur 62 also by the shape and / or dimensions of the contacts on Middle contact 92 or the end position contacts 98, 100 possible. Particularly advantageous switching properties can be reach when the contacts 94 of the center contact 92 are smaller than the end position contacts 98, 100.
  • the housing of the switch 60 made of plastic in one Manufacture injection molding process. The same applies to the Actuating plunger 70, which for wear reasons from a glass fiber-filled plastic material can exist. Due to the easy external accessibility, the Switch 60 can be easily exchanged in the field; when growing no complex adjustment necessary.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
EP99102978A 1998-04-28 1999-02-15 Interrupteur à pression Withdrawn EP0954000A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998118838 DE19818838C2 (de) 1998-04-28 1998-04-28 Druckschalter
DE19818838 1998-04-28

Publications (2)

Publication Number Publication Date
EP0954000A2 true EP0954000A2 (fr) 1999-11-03
EP0954000A3 EP0954000A3 (fr) 2000-07-05

Family

ID=7865970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99102978A Withdrawn EP0954000A3 (fr) 1998-04-28 1999-02-15 Interrupteur à pression

Country Status (3)

Country Link
EP (1) EP0954000A3 (fr)
JP (1) JPH11339612A (fr)
DE (1) DE19818838C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT503996B1 (de) * 2006-07-24 2008-12-15 Bosch Rexroth Ag Hydraulischer druckschalter
DE102016009027A1 (de) 2016-07-23 2018-01-25 Saurer Germany Gmbh & Co. Kg Wandler zur Umwandlung eines fluidischen in ein elektrisches Signal, Textilmaschine mit diesem Wandler und Verfahren zur Umwandlung eines fluidischen in ein elektrisches Signal
WO2020200713A1 (fr) * 2019-03-29 2020-10-08 Condor-Werke Gebr. Frede GmbH Dispositif de commutateur à poussoir

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10042011C1 (de) * 2000-08-26 2002-06-27 Bosch Gmbh Robert Druckschalter
DE102005049171A1 (de) * 2005-10-14 2007-04-19 Bosch Rexroth Ag Hydraulischer Druckschalter
DE202013100461U1 (de) 2013-02-01 2013-02-14 Hetec Limited Mikroschalter für einen Druckschalter mit einstellbarer Hysterese und Druckschalter mit derartigem Mikroschalter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504381A (en) * 1948-03-05 1950-04-18 Cons Vultee Aircraft Corp Pressure operated switch
US2767276A (en) * 1954-06-18 1956-10-16 Buchanan Electric switch
FR1275855A (fr) * 1959-12-11 1961-11-10 Interrupteur électrique
US3043929A (en) * 1960-02-25 1962-07-10 George G Guthrie Pressure actuated switch
DE7913018U1 (de) * 1979-05-05 1979-09-20 Robert Scheuffele & Co Armaturen U. Apparate, 7120 Bissingen Druckschalter in explosionssicherer Ausführung
DE3238530A1 (de) * 1982-10-18 1984-04-26 Franz Kirsten Elektrotechnische Spezialfabrik, 6530 Bingen Schnappschalter
DE3511898A1 (de) * 1985-04-01 1986-10-02 Reinhold Dipl.-Ing.(FH) 6990 Bad Mergentheim Barlian Schnappschalter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3710107A1 (de) * 1987-03-31 1988-10-13 Hydrostar Dipl Ing Rolf Oehler Hydraulischer druckschalter
DE8704718U1 (de) * 1987-03-31 1987-07-02 Delaval Turbine GmbH, 6361 Reichelsheim Druckschalter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504381A (en) * 1948-03-05 1950-04-18 Cons Vultee Aircraft Corp Pressure operated switch
US2767276A (en) * 1954-06-18 1956-10-16 Buchanan Electric switch
FR1275855A (fr) * 1959-12-11 1961-11-10 Interrupteur électrique
US3043929A (en) * 1960-02-25 1962-07-10 George G Guthrie Pressure actuated switch
DE7913018U1 (de) * 1979-05-05 1979-09-20 Robert Scheuffele & Co Armaturen U. Apparate, 7120 Bissingen Druckschalter in explosionssicherer Ausführung
DE3238530A1 (de) * 1982-10-18 1984-04-26 Franz Kirsten Elektrotechnische Spezialfabrik, 6530 Bingen Schnappschalter
DE3511898A1 (de) * 1985-04-01 1986-10-02 Reinhold Dipl.-Ing.(FH) 6990 Bad Mergentheim Barlian Schnappschalter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT503996B1 (de) * 2006-07-24 2008-12-15 Bosch Rexroth Ag Hydraulischer druckschalter
DE102006034637B4 (de) * 2006-07-24 2016-07-21 Robert Bosch Gmbh Hydraulischer Druckschalter
DE102016009027A1 (de) 2016-07-23 2018-01-25 Saurer Germany Gmbh & Co. Kg Wandler zur Umwandlung eines fluidischen in ein elektrisches Signal, Textilmaschine mit diesem Wandler und Verfahren zur Umwandlung eines fluidischen in ein elektrisches Signal
WO2020200713A1 (fr) * 2019-03-29 2020-10-08 Condor-Werke Gebr. Frede GmbH Dispositif de commutateur à poussoir

Also Published As

Publication number Publication date
DE19818838C2 (de) 2000-02-17
EP0954000A3 (fr) 2000-07-05
DE19818838A1 (de) 1999-11-11
JPH11339612A (ja) 1999-12-10

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