EP2518320A1 - Control safety block for high pressure cleaning devices with switching device - Google Patents

Control safety block for high pressure cleaning devices with switching device Download PDF

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Publication number
EP2518320A1
EP2518320A1 EP12002859A EP12002859A EP2518320A1 EP 2518320 A1 EP2518320 A1 EP 2518320A1 EP 12002859 A EP12002859 A EP 12002859A EP 12002859 A EP12002859 A EP 12002859A EP 2518320 A1 EP2518320 A1 EP 2518320A1
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EP
European Patent Office
Prior art keywords
switching
safety block
microswitch
actuating
spring
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
Application number
EP12002859A
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German (de)
French (fr)
Other versions
EP2518320B1 (en
Inventor
Kristensen Mikkel Aggersbjerg
Hindhede Rendal
Martin With Agerholm Jensen
Madsen Jørn Bo
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Nilfisk AS
Original Assignee
Nilfisk Advance AS
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Publication date
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Publication of EP2518320A1 publication Critical patent/EP2518320A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • F04B49/035—Bypassing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor

Definitions

  • the invention relates to a control safety block for high-pressure cleaning devices with switching device according to the preamble of claim 1.
  • Such a control and safety block is used to control the exiting from the high-pressure pump flow rate, which changes when you press the manual shutdown pistol.
  • the pressure in the high-pressure system rises until a switching pressure is reached, after which the control safety block responds and recirculates the water to avoid overloading the HP pump. There is accordingly a regulation of the exiting volume flow and its pressure.
  • EP 1 020 643 B1 is indicated by the reference numeral 42, a microswitch, which is actuated by a control piston 28, wherein the control piston 28 acts against a longitudinally guided in a housing spring 35.
  • a switching arm 29 is arranged, at the outer free end of an adjusting screw is arranged, which actuates the switching cam of a microswitch with its front free end.
  • microswitch switches the motor of the high pressure pump either directly or via a contactor.
  • the invention is based on the object, a control safety block for high-pressure cleaning equipment with a switching device according to the subject of the EP 1 020 643 B1 educate so that a reliable operation of the microswitch is given even with vibrations of the system and that further a sensitive adjustment of the microswitch is no longer required.
  • the invention is characterized by the technical teaching of claim 1.
  • An essential feature of the invention is that a spring-loaded actuating part is arranged at the free outer end of the switching arm, which is displaceable in the direction of the actuating travel of the switching cam of the microswitch under the load of a spring and the displacement path is limited by a stop.
  • the advantage is achieved that no longer a direct actuation of the switching cam of the microswitch is carried out by a arranged at the free outer end of the switching arm adjusting screw, but that an indirect actuation via a at the free end of the switching arm under the load of a compression spring slidably disposed actuating member.
  • actuation force of the switching arm is passed to the actuating part, and whose actuation is effected by a compression spring.
  • actuation force of the switching arm is passed to the actuating part, and whose actuation is effected by a compression spring.
  • a spring-loaded actuating part is accordingly arranged, which in turn causes the actuation of the microswitch.
  • the switching arm is parallel to its longitudinal axis by the control piston according to the EP 1 020 643 B1 shifted, so that it is a parallel displacement movement, which acts on the actuating part.
  • the actuating part engages with a shaft through a correspondingly aligned recess in the front free end of the switching arm and is slidably mounted there.
  • the actuating part is thus pressed upwards under the pressure of the compression spring by the sliding guide in the switching arm and moves with its actuating cam to the switching cam of the microswitch and actuates it.
  • the actuating part is stop-limited in its displacement.
  • the actuating part has a fixed stop plate, which has a precisely predetermined distance measure to its firmly associated actuating cam.
  • the operating part is always inserted by a well-defined distance measure in the housing designed as a stop, which receives the microswitch, and thus is set for an always repeatable operation of the switching cam of the microswitch by the precisely predetermined actuating travel of the actuating cam in the operating part.
  • the switching arm does not perform a parallel sliding movement, but a pivoting movement about a stationary pivot bearing and that the pivoting movement is caused by an actuating pin which is turned on in the displacement path between the control piston and the compression spring of the control safety block.
  • a switching device 1 which has a switching arm 2, which is designed to be displaceable in the direction of arrow 6 and in the opposite direction 6 '.
  • the switching arm 2 is switched in the actuation path between a control piston and a spring, as shown in the EP 1 020 643 B1 with respect to the switching arm 29 shown there and the spring 35 and the control piston 28 applies.
  • the spring is provided with the reference numeral 3, and it engages by a fastening 5 on the switching arm 2 down and is there with the control piston 4 in connection.
  • a recess 7 is arranged, which is adapted to the shape of the there with game passing shaft 8. It is a tilt-free sliding.
  • the shaft 8 is part of the actuating part 10, which consists essentially of an enlarged diameter stop plate 9, which is fixedly and with a certain distance (actuation path 36) with the upper, the switching operation triggering actuating cam 19 is connected.
  • the shaft 8 engages through the recess 7 in the switching arm 2 with sliding clearance, widening down and forms a spring retainer 11, which is approximately cup-shaped and open at the bottom.
  • a compression spring 14 engages in the spring seat 11.
  • the pot-shaped spring receptacle 11 forms a downwardly open receiving space 13.
  • the straight guide of the operating part 10 is made possible by the passage of the shaft 8 in the sliding guide 7.
  • FIG. 1 a housing-fixed level guide 12 shown schematically.
  • the outer circumference of the cup-shaped spring receptacle 11 can be straight through stationary housing surfaces, so that can be dispensed with a straight guide in the sliding guide 7, 8 at the free front end of the switching arm 2.
  • the microswitch 17 is mounted with positioning pins 20 in a housing-fixed housing 16, and the actuating cam 19 can be moved through an opening 21 in the housing 16 in the direction of the switching cam 18 of the micro-switch 17.
  • FIG. 2 shows the switched position. It can be seen that with displacement of the switching arm 2 in the direction of arrow 6 'up the operating member 10 a sliding movement to the actuating travel 35 passes through the slide 7, 8 and the compression spring 14, the entire operating member 10 moves upward, regardless of whether the switching arm 2 in its fully shifted position in the direction of arrow 6 'or not.
  • FIGS. 4 and 5 show an enlargement of the actuation path in that the switching arm 22 is designed as a pivoting arm. It forms at its rear free end a pivot bearing 23 which is formed by a pivoting head 26 on the switching arm 22, which engages in a housing-fixed bearing shell 25 and is pivotally guided there.
  • the operating part 30 after the execution part of FIGS. 4 and 5 consists of the shaft 8, at the upper free end of the stop plate 9 is arranged, at the upper end of the actuating cam 19 is attached.
  • the shaft 8 engages slidably over a threaded shaft 33 down through an opening in the spring retainer 31 and is secured there with a lock nut 32.
  • FIG. 4 shows the switching position, in accordance with FIG. 1 It can be seen that the actuating cam 19 of the actuating member 30 has been precisely and repeatedly shifted into the housing 16 around the actuating path 36, because the actuating travel by the distance of the front end of the control cam 18 always remains the same compared to the stop surface of the stopper plate 9.
  • the length of the shaft 8 is also adjusted so that there is always a game, so that the sole operating force for the actuating member 30 is applied by the compression spring 14 and not by the pivoting path of the switching arm 22nd
  • FIG. 5 shows the displacement of the actuating pin 24 in the slot formed as a recess 27 in the switching arm 22, which is thus pivoted away in the direction of arrow 29 'down, so that the actuating cam 19 is disengaged from the switching cam 18 of the microswitch 17.
  • Advantage of the present invention is that it no longer depends on the tolerances in the displacement path of the control piston and the spring in the control safety block and that it no longer requires a finely adjustable and fixable adjustment screw for the operation of the microswitch, because an always consistent operation game (actuation path 36) is given by an actuated only indirectly by the switching arm actuating part 10, 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

The regulating safety block comprises a switching device (1) for a high pressure pump, a micro-switch (17), and a switching cam (18) which is actuated by a switching arm (2) by the displacement of a spring (3). The high pressure of the high pressure pump is acted upon the control piston (4). The actuation of the micro-switch is carried out through the free end of the switching arm, under the load of a compression spring (14) which is slidably mounted on an actuator (10).

Description

Die Erfindung betrifft einen Regelsicherheitsblock für Hochdruck-Reinigungsgeräte mit Schalteinrichtung nach dem Oberbegriff des Patentanspruches 1.The invention relates to a control safety block for high-pressure cleaning devices with switching device according to the preamble of claim 1.

Ein solcher Regelsicherheitsblock ist mit dem Gegenstand der EP 1 020 643 B1 bekannt geworden. Der Offenbarungsgehalt dieser Druckschrift soll vollinhaltlich von dem Offenbarungsinhalt des vorliegenden Gebrauchsmusters umfasst sein.Such a rule security block is with the subject of EP 1 020 643 B1 known. The disclosure of this document is intended to be included in full content of the disclosure of the present utility model.

Ein solcher Regel- und Sicherheitsblock dient zur Regelung des aus der Hochdruckpumpe austretenden Volumenstroms, der sich beim Betätigen der Handabschaltpistole ändert. Wird die Handabschaltpistole geschlossen, steigt der Druck im Hochdrucksystem an, und zwar bis zum Erreichen eines Umschaltdruckes, danach spricht der Regelsicherheitsblock an und führt das Wasser im Kreislauf, um eine Überlastung der HD-Pumpe zu vermeiden. Es findet demgemäß eine Regelung des austretenden Volumenstroms und dessen Druck statt.Such a control and safety block is used to control the exiting from the high-pressure pump flow rate, which changes when you press the manual shutdown pistol. When the manual shut-off gun is closed, the pressure in the high-pressure system rises until a switching pressure is reached, after which the control safety block responds and recirculates the water to avoid overloading the HP pump. There is accordingly a regulation of the exiting volume flow and its pressure.

In der Druckschrift EP 1 020 643 B1 ist mit dem Bezugszeichen 42 ein Mikroschalter dargestellt, der von einem Steuerkolben 28 betätigt wird, wobei der Steuerkolben 28 gegen eine in einem Gehäuse längs geführte Feder 35 wirkt.In the publication EP 1 020 643 B1 is indicated by the reference numeral 42, a microswitch, which is actuated by a control piston 28, wherein the control piston 28 acts against a longitudinally guided in a housing spring 35.

Im Verschiebeweg zwischen dem Steuerkolben 28 und der Feder 35 ist ein Schaltarm 29 angeordnet, an dessen äußeren freien Ende eine Einstellschraube angeordnet ist, die mit ihrem vorderen freien Ende die Schaltnocke eines Mikroschalters betätigt.In the displacement between the control piston 28 and the spring 35, a switching arm 29 is arranged, at the outer free end of an adjusting screw is arranged, which actuates the switching cam of a microswitch with its front free end.

Es hat sich herausgestellt, dass der Schaltweg des Mikroschalters und dessen Betätigung nicht immer zuverlässig arbeiten.It has been found that the switching path of the microswitch and its operation does not always work reliably.

Die Justierung des Schaltweges mit einer Einstellschraube zur Einstellung des Betätigungsweges des Mikroschalters ist langwierig und aufwendig. Die Einstellschraube muss mit einer Kontermutter gekontert werden, um ein unbeabsichtigtes Verstellen des Einstellweges zu verhindern.The adjustment of the switching path with an adjusting screw for adjusting the actuation path of the microswitch is tedious and expensive. The adjusting screw must be countered with a lock nut to prevent unintentional adjustment of the adjustment path.

Wenn es zu Schwingungen im System kommt und der Steuerkolben unerwünscht schwingt, kann es zu einer unerwünschten Betätigung des Mikroschalters kommen. Der Betätigungsweg des Mikroschalters ist demzufolge kritisch einzustellen. Der Mikroschalter schaltet den Motor der Hochdruckpumpe entweder direkt oder über einen Schaltschütz.If there are oscillations in the system and the control piston oscillates undesirably, this can lead to undesired operation of the microswitch. The actuation of the microswitch is therefore critical to adjust. The microswitch switches the motor of the high pressure pump either directly or via a contactor.

Der Erfindung liegt die Aufgabe zugrunde, einen Regelsicherheitsblock für Hochdruck-Reinigungsgeräte mit einer Schalteinrichtung nach dem Gegenstand der EP 1 020 643 B1 so weiterzubilden, dass eine zuverlässige Betätigung des Mikroschalters auch bei Schwingungen des Systems gegeben ist und dass ferner eine feinfühlige Einstellung des Mikroschalters nicht mehr erforderlich ist.The invention is based on the object, a control safety block for high-pressure cleaning equipment with a switching device according to the subject of the EP 1 020 643 B1 educate so that a reliable operation of the microswitch is given even with vibrations of the system and that further a sensitive adjustment of the microswitch is no longer required.

Zur Lösung der gestellten Aufgabe ist die Erfindung durch die technische Lehre des Anspruches 1 gekennzeichnet.To solve the problem, the invention is characterized by the technical teaching of claim 1.

Wesentliches Merkmal der Erfindung ist, dass am freien äußeren Ende des Schaltarmes ein federbelastetes Betätigungsteil angeordnet ist, das in Richtung des Betätigungsweges der Schaltnocke des Mikroschalters unter der Last einer Feder verschiebbar ist und dessen Verschiebungsweg anschlagbegrenzt ist.An essential feature of the invention is that a spring-loaded actuating part is arranged at the free outer end of the switching arm, which is displaceable in the direction of the actuating travel of the switching cam of the microswitch under the load of a spring and the displacement path is limited by a stop.

Damit wird der Vorteil erreicht, dass nicht mehr eine direkte Betätigung der Schaltnocke des Mikroschalters durch eine am freien äußeren Ende des Schaltarmes angeordnete Einstellschraube erfolgt, sondern dass eine indirekte Betätigung über ein am freien Ende des Schaltarmes unter der Last einer Druckfeder verschiebbar angeordnetes Betätigungsteil erfolgt.Thus, the advantage is achieved that no longer a direct actuation of the switching cam of the microswitch is carried out by a arranged at the free outer end of the switching arm adjusting screw, but that an indirect actuation via a at the free end of the switching arm under the load of a compression spring slidably disposed actuating member.

Damit ergibt sich der wesentliche Vorteil, dass der Schaltarm selbst nur noch indirekt mit seiner Verschiebung oder Verschwenkung die Betätigung der Schaltnocke des Mikroschalters ausführt und dass stattdessen nunmehr eine am Betätigungsteil angeordnete Druckfeder für eine zuverlässige Verschiebung des Betätigungsteils in Richtung auf die Schaltnocke und weg von dieser Schaltnocke des Mikroschalters sorgt.This results in the significant advantage that the switching arm itself only indirectly with its displacement or pivoting performs the actuation of the switching cam of the microswitch and that instead now an am Actuator disposed compression spring for a reliable displacement of the actuating member in the direction of the switching cam and away from this switching cam of the microswitch provides.

Damit kommt es nicht mehr auf die Betätigungskraft des Schaltarmes an, wie er als kritisch in der EP 1 020 643 B1 erkannt wurde, sondern stattdessen schlägt die vorliegende Erfindung vor, dass Betätigungskraft des Schaltarmes auf das Betätigungsteil geleitet wird, und deren Betätigung durch eine Druckfeder bewirkt wird. Im Verschiebungsweg des Schaltarmes ist demgemäß ein federbelastetes Betätigungsteil angeordnet, das seinerseits die Betätigung des Mikroschalters bewirkt.It is no longer on the operating force of the switching arm, as he as critical in the EP 1 020 643 B1 has been recognized, but instead proposes the present invention that actuation force of the switching arm is passed to the actuating part, and whose actuation is effected by a compression spring. In the displacement path of the switching arm a spring-loaded actuating part is accordingly arranged, which in turn causes the actuation of the microswitch.

Damit besteht der Vorteil, dass die Druckkraft zur Betätigung immer wiederholbar im gleichen Umfang durch die verwendete Druckfeder aufgebracht wird, unabhängig davon, ob der Schaltarm nun in seiner vollständig geschalteten Position verschoben wurde oder nicht.This has the advantage that the pressure force for actuation is always reproducibly applied to the same extent by the compression spring used, regardless of whether the switching arm has now been moved in its fully switched position or not.

Es reicht aus, wenn der Schaltarm annährend in seine Schaltposition gelangt und damit das Betätigungsteil freigibt, welches dann unter dem Druck der Druckfeder die Schaltnocke des Mikroschalters betätigt.It is sufficient if the switching arm almost reaches its switching position and thus releases the actuating part, which then actuates the switching cam of the microswitch under the pressure of the compression spring.

Hierbei gibt es nach der Erfindung mehrere Ausführungsformen, die als erfindungswesentlich beansprucht werden.In this case, there are several embodiments according to the invention, which are claimed as essential to the invention.

In einer ersten bevorzugten Ausführungsform wird der Schaltarm parallel zu seiner Längsachse durch den Steuerkolben gemäß der EP 1 020 643 B1 verschoben, so dass es sich um eine parallele Verschiebebewegung handelt, die auf das Betätigungsteil wirkt.In a first preferred embodiment, the switching arm is parallel to its longitudinal axis by the control piston according to the EP 1 020 643 B1 shifted, so that it is a parallel displacement movement, which acts on the actuating part.

Bei dieser Ausführung greift das Betätigungsteil mit einem Schaft durch eine entsprechend zugerichtete Ausnehmung im vorderen freien Ende des Schaltarmes hindurch und ist dort verschiebbar gelagert.In this embodiment, the actuating part engages with a shaft through a correspondingly aligned recess in the front free end of the switching arm and is slidably mounted there.

Sobald der Schaltarm von der einen parallelen in die andere parallele Position verschoben wird, wird somit auch das Betätigungsteil unter dem Druck der Druckfeder durch die Gleitführung im Schaltarm nach oben gedrückt und fährt mit seiner Betätigungsnocke an die Schaltnocke des Mikroschalters heran und betätigt diese.As soon as the switching arm is displaced from one parallel to the other parallel position, the actuating part is thus pressed upwards under the pressure of the compression spring by the sliding guide in the switching arm and moves with its actuating cam to the switching cam of the microswitch and actuates it.

Erfindungsgemäß ist das Betätigungsteil in seinem Verschiebeweg anschlagbegrenzt. Das Betätigungsteil weist einen festen Anschlagteller auf, der ein genau vorgegebenes Distanzmaß zu seiner fest damit verbundenen Betätigungsnocke aufweist.According to the invention, the actuating part is stop-limited in its displacement. The actuating part has a fixed stop plate, which has a precisely predetermined distance measure to its firmly associated actuating cam.

Auf diese Weise wird das Betätigungsteil immer um ein genau definiertes Distanzmaß in das als Anschlag ausgebildete Gehäuse eingeschoben, welches den Mikroschalter aufnimmt, und damit wird für eine stets wiederholbare Betätigung der Schaltnocke des Mikroschalters durch den genau vorgegebenen Betätigungsweg der Betätigungsnocke im Betätigungsteil vorgegeben.In this way, the operating part is always inserted by a well-defined distance measure in the housing designed as a stop, which receives the microswitch, and thus is set for an always repeatable operation of the switching cam of the microswitch by the precisely predetermined actuating travel of the actuating cam in the operating part.

Es findet demgemäß stets eine wiederholbare und um einen gleichen Betätigungsweg stattfindende Betätigung der Schaltnocke des Mikroschalters statt.Accordingly, there is always a repeatable actuation of the switching cam of the microswitch taking place about the same actuating travel.

Dies ist beim Stand der Technik nicht bekannt, weil dort der Schaltweg durch die Verschiebung des Steuerkolbens und die Druckkraft der dagegen wirkenden Druckfeder abhängig war. Dies wird bei der vorliegenden Erfindung vermieden.This is not known in the prior art, because there the switching path was dependent on the displacement of the control piston and the pressure force of the compression spring acting against it. This is avoided in the present invention.

In einer zweiten Ausführungsform nach der Erfindung ist vorgesehen, dass der Schaltarm keine parallele Verschiebebewegung ausführt, sondern eine Schwenkbewegung um ein ortsfestes Schwenklager und dass die Schwenkbewegung durch einen Betätigungsstift veranlasst wird, der im Verschiebungsweg zwischen dem Steuerkolben und der Druckfeder des Regelsicherheitsblocks eingeschaltet ist.In a second embodiment according to the invention it is provided that the switching arm does not perform a parallel sliding movement, but a pivoting movement about a stationary pivot bearing and that the pivoting movement is caused by an actuating pin which is turned on in the displacement path between the control piston and the compression spring of the control safety block.

Aufgrund der Hebelwirkung des Betätigungsstiftes auf die Länge des Schaltarmes ergibt sich eine große Übersetzung für den Schaltweg des Schaltarmes, wodurch eine große Betätigungslänge für das Betätigungsteil erreicht wird.Due to the leverage of the actuating pin on the length of the switching arm results in a large translation for the switching path of the switching arm, whereby a large operating length is achieved for the actuating part.

Der Erfindungsgegenstand der vorliegenden Erfindung ergibt sich nicht nur aus dem Gegenstand der einzelnen Patentansprüche, sondern auch aus der Kombination der einzelnen Patentansprüche untereinander.The subject of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other.

Alle in den Unterlagen, einschließlich der Zusammenfassung offenbarten Angaben und Merkmale, insbesondere die in den Zeichnungen dargestellte räumliche Ausbildung, werden als erfindungswesentlich beansprucht, soweit sie einzeln oder in Kombination gegenüber dem Stand der Technik neu sind.All information and features disclosed in the documents, including the abstract, in particular the spatial design shown in the drawings, are claimed to be essential to the invention insofar as they are novel individually or in combination with respect to the prior art.

Im Folgenden wird die Erfindung anhand von lediglich einen Ausführungsweg darstellenden Zeichnungen näher erläutert. Hierbei gehen aus den Zeichnungen und ihrer Beschreibung weitere wesentliche Merkmale und Vorteile der Erfindung hervor.In the following the invention will be explained in more detail with reference to drawings showing only one embodiment. Here are the drawings and their description further essential features and advantages of the invention.

Es zeigen:

Figur 1:
schematisiert eine Ausführung einer Schalteinrichtung in einer ersten Ausführungsform im nicht geschalteten Zustand
Figur 2:
die gleiche Darstellung wie Figur 1 im geschalteten Zustand
Figur 3:
Schnitt in Höhe des Schaltarmes
Figur 4:
eine zweite Ausführungsform einer Schalteinrichtung mit einem eine Schwenkbewegung ausführenden Schaltarm im geschalteten Zustand
Figur 5:
die gleiche Ausführungsform wie Figur 4 im nicht geschalteten Zustand
Show it:
FIG. 1:
schematically illustrates an embodiment of a switching device in a first embodiment in the non-switched state
FIG. 2:
the same representation as FIG. 1 in the switched state
FIG. 3:
Section at the level of the switching arm
FIG. 4:
a second embodiment of a switching device with a pivotal movement exporting switching arm in the switched state
FIG. 5:
the same embodiment as FIG. 4 in the non-switched state

In Figuren 1 und 2 ist allgemeine eine Schalteinrichtung 1 dargestellt, die einen Schaltarm 2 aufweist, der in Pfeilrichtung 6 und in Gegenrichtung 6' verschiebbar ausgebildet ist. Der Schaltarm 2 ist im Betätigungsweg zwischen einem Steuerkolben und einer Feder eingeschaltet, so wie es in der EP 1 020 643 B1 bezüglich des dort gezeigten Schaltarmes 29 und der Feder 35 und dem Steuerkolben 28 gilt.In Figures 1 and 2 In general, a switching device 1 is shown, which has a switching arm 2, which is designed to be displaceable in the direction of arrow 6 and in the opposite direction 6 '. The switching arm 2 is switched in the actuation path between a control piston and a spring, as shown in the EP 1 020 643 B1 with respect to the switching arm 29 shown there and the spring 35 and the control piston 28 applies.

Im gezeigten Ausführungsbeispiel nach Figur 1 ist die Feder mit dem Bezugszeichen 3 versehen, und sie greift durch eine Befestigung 5 am Schaltarm 2 nach unten und steht dort mit dem Steuerkolben 4 in Verbindung.In the illustrated embodiment according to FIG. 1 the spring is provided with the reference numeral 3, and it engages by a fastening 5 on the switching arm 2 down and is there with the control piston 4 in connection.

Bei Betätigung des Steuerkolbens 4 wird der gesamte Schaltarm 2 in Pfeilrichtung 6 nach unten verschoben.Upon actuation of the control piston 4, the entire switching arm 2 is moved in the direction of arrow 6 down.

Am vorderen freien Ende des Schaltarmes 2 ist eine Ausnehmung 7 angeordnet, die der Formgebung des dort mit Spiel hindurch tretenden Schaftes 8 angepasst ist. Es handelt sich um eine verkantungsfreie Gleitführung.At the front free end of the switching arm 2, a recess 7 is arranged, which is adapted to the shape of the there with game passing shaft 8. It is a tilt-free sliding.

Der Schaft 8 ist Teil des Betätigungsteils 10, welches im Wesentlichen aus einem im Durchmesser vergrößerten Anschlagteller 9 besteht, der fest und mit einem bestimmten Abstand (Betätigungsweg 36) mit der oberen, den Schaltvorgang auslösenden Betätigungsnocke 19 verbunden ist.The shaft 8 is part of the actuating part 10, which consists essentially of an enlarged diameter stop plate 9, which is fixedly and with a certain distance (actuation path 36) with the upper, the switching operation triggering actuating cam 19 is connected.

Der Schaft 8 greift durch die Ausnehmung 7 im Schaltarm 2 mit Gleitspiel hindurch, verbreitert sich nach unten und bildet eine Federaufnahme 11, die etwa topfförmig ausgebildet und nach unten geöffnet ist.The shaft 8 engages through the recess 7 in the switching arm 2 with sliding clearance, widening down and forms a spring retainer 11, which is approximately cup-shaped and open at the bottom.

Eine Druckfeder 14 greift in die Federaufnahme 11 ein. Die topfförmige Federaufnahme 11 bildet einen nach unten offenen Aufnahmeraum 13 aus.A compression spring 14 engages in the spring seat 11. The pot-shaped spring receptacle 11 forms a downwardly open receiving space 13.

Die Geradführung des Betätigungsteils 10 wird durch das Hindurchtreten des Schaftes 8 in der Gleitführung 7 ermöglicht.The straight guide of the operating part 10 is made possible by the passage of the shaft 8 in the sliding guide 7.

Als weitere Ausführungsform ist in Figur 1 eine gehäusefeste Gradführung 12 schematisiert dargestellt.As a further embodiment is in FIG. 1 a housing-fixed level guide 12 shown schematically.

Hier ist erkennbar, dass der Außenumfang der topfförmigen Federaufnahme 11 durch ortsfeste Gehäuseflächen geradgeführt werden kann, so dass auf eine Geradführung im Bereich der Gleitführung 7, 8 am freien vorderen Ende des Schaltarmes 2 verzichtet werden kann.Here it can be seen that the outer circumference of the cup-shaped spring receptacle 11 can be straight through stationary housing surfaces, so that can be dispensed with a straight guide in the sliding guide 7, 8 at the free front end of the switching arm 2.

Wichtig ist, dass in der passiven und nicht geschalteten Situation nach Figur 1 der Schaltarm 2 das Betätigungsteil 10 mit der Federaufnahme 11 nach unten entgegen der Kraft der Feder 14 im gespannten Zustand hält, so dass die Betätigungsnocke 18 eine freie Strecke (Schaltspiel 34) in Richtung auf die Schaltnocke 18 des Mikroschalters 17 aufweist.It is important that in the passive and un-switched situation after FIG. 1 the switching arm 2 holds the operating member 10 with the spring retainer 11 down against the force of the spring 14 in the tensioned state, so that the actuating cam 18 has a free distance (switching cycle 34) in the direction of the switching cam 18 of the microswitch 17.

Der Mikroschalter 17 ist mit Positionierstiften 20 in einem gehäusefesten Gehäuse 16 gelagert, und die Betätigungsnocke 19 kann durch eine Öffnung 21 im Gehäuse 16 in Richtung auf die Schaltnocke 18 des Mikroschalters 17 bewegt werden.The microswitch 17 is mounted with positioning pins 20 in a housing-fixed housing 16, and the actuating cam 19 can be moved through an opening 21 in the housing 16 in the direction of the switching cam 18 of the micro-switch 17.

Die Figur 2 zeigt die geschaltete Stellung. Es ist erkennbar, dass mit Verschiebung des Schaltarmes 2 in Pfeilrichtung 6' nach oben das Betätigungsteil 10 eine Verschiebebewegung um den Betätigungsweg 35 durch die Gleitführung 7, 8 hindurchführt und die Druckfeder 14 das gesamte Betätigungsteil 10 nach oben verschiebt, unabhängig davon, ob der Schaltarm 2 in seiner vollständig verschobenen Stellung in Pfeilrichtung 6' ist oder nicht.The FIG. 2 shows the switched position. It can be seen that with displacement of the switching arm 2 in the direction of arrow 6 'up the operating member 10 a sliding movement to the actuating travel 35 passes through the slide 7, 8 and the compression spring 14, the entire operating member 10 moves upward, regardless of whether the switching arm 2 in its fully shifted position in the direction of arrow 6 'or not.

Wesentlich ist, dass die Druckfeder 14 allein den Betätigungsdruck auf das Betätigungsteil 10 ausübt und somit die Betätigungsnocke 19 um den Betätigungsweg 36 in das Gehäuse 16 hinein fährt und die Schaltnocke 18 des Mikroschalters in die Stellung nach 18' gemäß Figur 1 schaltet.It is essential that the compression spring 14 alone exerts the actuating pressure on the actuating part 10 and thus moves the actuating cam 19 about the actuating travel 36 into the housing 16 and the switching cam 18 of the microswitch in the position according to 18 ' FIG. 1 on.

Demzufolge ist bei der Erfindung wesentlich, dass stets ein gleichbleibender Schaltweg 37 zwischen der eingedrückten Stellung der Schaltnocke 18 und der nicht eingedrückten Stellung der Schaltnocke 18' am Mikroschalter 17 erreicht wird, unabhängig davon, um welchen Betätigungsweg der Schaltarm 2 in den Pfeilrichtungen 6, 6' verschoben wurde.Accordingly, it is essential in the invention that always a constant switching path 37 between the depressed position of the switching cam 18 and the non-depressed position of the switching cam 18 'reaches the microswitch 17 is, regardless of which actuation the switching arm 2 in the arrow directions 6, 6 'has been moved.

Die Figuren 4 und 5 zeigen eine Vergrößerung des Betätigungsweges dadurch, dass der Schaltarm 22 als Schwenkarm ausgebildet ist. Er bildet an seinem hinteren freien Ende ein Schwenklager 23, welches durch einen Schwenkkopf 26 am Schaltarm 22 gebildet ist, der in eine gehäusefeste Lagerschale 25 eingreift und dort verschwenkbar geführt ist.The FIGS. 4 and 5 show an enlargement of the actuation path in that the switching arm 22 is designed as a pivoting arm. It forms at its rear free end a pivot bearing 23 which is formed by a pivoting head 26 on the switching arm 22, which engages in a housing-fixed bearing shell 25 and is pivotally guided there.

Die Verschwenkung des Schaltarmes 22 in den Pfeilrichtungen 28, 28' erfolgt mittels eines Betätigungsstiftes 24, der im Verschiebungsweg zwischen der Feder 3 und dem Steuerkolben 4 eingebaut ist und der diesen Verschiebungsweg mitmacht.The pivoting of the switching arm 22 in the directions of arrows 28, 28 'by means of an actuating pin 24 which is installed in the displacement path between the spring 3 and the control piston 4 and which participates in this displacement path.

Bei einer geringfügigen Verschiebung des Betätigungsstiftes 24 in den Pfeilrichtungen 28, 28' kommt es zu einer entsprechend dem vorgesehenen Hebelarm übersetzten Verschwenkbewegung des Schaltarmes 22 in den Pfeilrichtungen 29, 29'. Dadurch ist ein wesentlich größerer Schwenkweg für das Betätigungsteil 30 gegeben.With a slight displacement of the actuating pin 24 in the directions of arrows 28, 28 ', there is a corresponding to the intended lever arm translated pivoting movement of the switching arm 22 in the direction of arrows 29, 29'. As a result, a substantially larger pivoting path for the actuating part 30 is given.

Das Betätigungsteil 30 nach dem Ausführungsteil der Figuren 4 und 5 besteht aus dem Schaft 8, an dessen oberen freien Ende der Anschlagteller 9 angeordnet ist, an dessen oberen Ende die Betätigungsnocke 19 befestigt ist.The operating part 30 after the execution part of FIGS. 4 and 5 consists of the shaft 8, at the upper free end of the stop plate 9 is arranged, at the upper end of the actuating cam 19 is attached.

Der Schaft 8 greift verschiebbar über einen Gewindeschaft 33 nach unten durch eine Öffnung in der Federaufnahme 31 hindurch und ist dort mit einer Sicherungsmutter 32 gesichert.The shaft 8 engages slidably over a threaded shaft 33 down through an opening in the spring retainer 31 and is secured there with a lock nut 32.

Die Figur 4 zeigt die Schaltstellung, bei der gemäß Figur 1 erkennbar ist, dass die Betätigungsnocke 19 des Betätigungsteils 30 genau und wiederholbar um den Betätigungsweg 36 in das Gehäuse 16 hineinverschoben wurde, weil der Betätigungsweg durch den Abstand des vorderen Endes der Schaltnocke 18 im Vergleich zu der Anschlagfläche des Anschlagtellers 9 stets gleich bleibt.The FIG. 4 shows the switching position, in accordance with FIG. 1 It can be seen that the actuating cam 19 of the actuating member 30 has been precisely and repeatedly shifted into the housing 16 around the actuating path 36, because the actuating travel by the distance of the front end of the control cam 18 always remains the same compared to the stop surface of the stopper plate 9.

In diesem Ausführungsbeispiel ist die Länge des Schaftes 8 auch so eingestellt, dass stets ein Spiel bleibt, so dass die alleinige Betätigungskraft für das Betätigungsteil 30 durch die Druckfeder 14 aufgebracht wird und nicht durch den Schwenkweg des Schaltarmes 22.In this embodiment, the length of the shaft 8 is also adjusted so that there is always a game, so that the sole operating force for the actuating member 30 is applied by the compression spring 14 and not by the pivoting path of the switching arm 22nd

Die Figur 5 zeigt die Verschiebung des Betätigungsstiftes 24 in der als Langloch ausgebildeten Ausnehmung 27 im Schaltarm 22, der somit in Pfeilrichtung 29' nach unten weggeschwenkt wird, so dass die Betätigungsnocke 19 außer Eingriff mit der Schaltnocke 18 des Mikroschalters 17 kommt.The FIG. 5 shows the displacement of the actuating pin 24 in the slot formed as a recess 27 in the switching arm 22, which is thus pivoted away in the direction of arrow 29 'down, so that the actuating cam 19 is disengaged from the switching cam 18 of the microswitch 17.

Vorteil der vorliegenden Erfindung ist, dass es nicht mehr auf die Toleranzen im Verschiebungsweg des Steuerkolbens und der Feder im Regelsicherheitsblock ankommt und dass es auch nicht mehr einer feineinstellbaren und fixierbaren Einstellschraube für die Betätigung des Mikroschalters bedarf, weil ein stets gleichbleibendes Betätigungsspiel (Betätigungsweg 36) durch ein nur indirekt von dem Schaltarm betätigtes Betätigungsteil 10, 30 gegeben ist.Advantage of the present invention is that it no longer depends on the tolerances in the displacement path of the control piston and the spring in the control safety block and that it no longer requires a finely adjustable and fixable adjustment screw for the operation of the microswitch, because an always consistent operation game (actuation path 36) is given by an actuated only indirectly by the switching arm actuating part 10, 30.

Zeichnungslegendedrawing Legend

11
Schalteinrichtungswitching device
22
Schaltarmshifting
33
Federfeather
44
Steuerkolbenspool
55
Befestigungattachment
66
Pfeilrichtung 6'Arrow direction 6 '
77
Ausnehmungrecess
88th
Schaftshaft
99
Anschlagtellerstop plate
1010
Betätigungsteilactuating member
1111
Federaufnahmespring mount
1212
Geradführung (optional)Straight guide (optional)
1313
Aufnahmeraumaccommodation space
1414
Druckfedercompression spring
1515
Abstützflächesupporting
1616
Gehäusecasing
1717
Mikroschaltermicroswitch
1818
Schaltnocke 18'Switching cam 18 '
1919
Betätigungsnockeactuating cam
2020
Positionierungsstiftpositioning pin
2121
Öffnungopening
2222
Schaltarmshifting
2323
Schwenklagerpivot bearing
2424
Betätigungsstiftactuating pin
2525
Lagerschalebearing shell
2626
Schwenkkopfswivel head
2727
Ausnehmungrecess
2828
Pfeilrichtung 28'Arrow direction 28 '
2929
Pfeilrichtung 29'Arrow direction 29 '
3030
Betätigungsteilactuating member
3131
Federaufnahmespring mount
3232
Sicherungsmutterlocknut
3333
Gewindeschaftthreaded shaft
3434
Schaltspielswitching game
3535
Betätigungsweg von 10Actuation range of 10
3636
Betätigungsweg von 19Actuation path of 19
3737
SchaltwegContact travel

Claims (9)

Regelsicherheitsblock für Hochdruck-Reinigungsgeräte mit einer Schalteinrichtung (1) für eine Hochdruckpumpe, die als Mikroschalter (17) ausgebildet ist, dessen Schaltnocke (18) von einem Schaltarm (2, 22) betätigt ist, der im Verschiebungsweg zwischen einer Feder (3) und einem vom Hochdruck der Hochdruckpumpe beaufschlagten Steuerkolben (4) angeordnet ist, dadurch gekennzeichnet, dass die Betätigung des Mikroschalters (17) über ein am freien Ende des Schaltarmes (2, 22) unter der Last einer Druckfeder (14) verschiebbar angeordnetes Betätigungsteil (10, 30) erfolgt.Control safety block for high-pressure cleaning devices with a switching device (1) for a high-pressure pump, which is designed as a microswitch (17), the switching cam (18) by a switching arm (2, 22) is actuated in the displacement between a spring (3) and a control piston (4) acted upon by the high pressure of the high-pressure pump, characterized in that the actuation of the microswitch (17) is controlled by an actuating part (10, 10) displaceably arranged at the free end of the switching arm (2, 22) under the load of a compression spring (14). 30). Regelsicherheitsblock nach Anspruch 1, dadurch gekennzeichnet, dass das am freien Ende des Schaltarmes (2) angeordnete, federbelastete Betätigungsteil (10, 30) in Richtung des Betätigungsweges (35) der Schaltnocke (18) des Mikroschalters (17) unter der Last der Feder (14) durch Anschläge (9, 16) begrenzt verschiebbar ist.Rule security block according to claim 1, characterized in that the at the free end of the switching arm (2) arranged, spring-loaded actuating member (10, 30) in the direction of the actuating travel (35) of the switching cam (18) of the microswitch (17) under the load of the spring ( 14) by stops (9, 16) is limitedly displaceable. Regelsicherheitsblock nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Schaltarm (2) durch den Steuerkolben (4) parallel zu seiner Längsachse verschiebbar ist.Control safety block according to claim 1 or 2, characterized in that the switching arm (2) by the control piston (4) is displaceable parallel to its longitudinal axis. Regelsicherheitsblock nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Betätigungsteil (10) mit einem Schaft (8) durch eine Ausnehmung (7) im vorderen freien Ende des Schaltarmes (2) hindurch greift und dort verschiebbar gelagert ist.Control safety block according to one of claims 1 to 3, characterized in that the actuating part (10) engages with a shaft (8) through a recess (7) in the front free end of the switching arm (2) and is slidably mounted there. Regelsicherheitsblock nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Betätigungsteil (10, 30) um ein definiertes Distanzmaß (Betätigungsweg 36) in das als Anschlag ausgebildete Gehäuse (16) des Mikroschalters (17) einschiebbar ist.Control safety block according to one of claims 1 to 4, characterized in that the actuating part (10, 30) by a defined Distanzmaß (Betätigungsweg 36) in the designed as a stop housing (16) of the microswitch (17) can be inserted. Regelsicherheitsblock nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Schaltarm (22) eine Schwenkbewegung um ein ortsfestes Schwenklager (23) ausführt, dessen Schwenkbewegung durch einen Betätigungsstift (24) gesteuert ist, der vom Steuerkolben (4) betätigt ist.Control safety block according to one of claims 1 to 5, characterized in that the switching arm (22) performs a pivoting movement about a stationary pivot bearing (23) whose pivotal movement is controlled by an actuating pin (24) which is actuated by the control piston (4). Regelsicherheitsblock nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Betätigungsteil (10, 30) eine topfförmige Federaufnahme (11) ausbildet, in der eine Druckfeder (14) eingreift, deren anderes Ende sich an einer festen Fläche abstützt.Control safety block according to one of claims 1 to 6, characterized in that the actuating part (10, 30) forms a cup-shaped spring receptacle (11) in which a compression spring (14) engages, the other end is supported on a fixed surface. Regelsicherheitsblock nach Anspruch 7, dadurch gekennzeichnet, dass sich an die Federaufnahme (11) ein Schaft (19) anschliesst, der durch eine Öffnung (21) im Gehäuse (16) des Mikroschalters (17) hindurch greift und die Schaltnocke (18) betätigt.Control safety block according to claim 7, characterized in that adjoining the spring receptacle (11) is a shaft (19) which engages through an opening (21) in the housing (16) of the microswitch (17) and actuates the switching cam (18). Regelsicherheitsblock nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass am Schaft des Betätigungsteils (10, 30) ein Anschlagteller (9) befestigt ist, der am Gehäuse (16) zur Anlage bringbar ist.Control safety block according to one of claims 1 to 8, characterized in that on the shaft of the actuating part (10, 30) a stop plate (9) is fixed, which can be brought to the housing (16) for conditioning.
EP12002859.2A 2011-04-27 2012-04-24 Control safety block for high pressure cleaning devices with switching device Active EP2518320B1 (en)

Applications Claiming Priority (1)

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DE201120005630 DE202011005630U1 (en) 2011-04-27 2011-04-27 Control safety block for high-pressure cleaning devices with switching device

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EP2518320A1 true EP2518320A1 (en) 2012-10-31
EP2518320B1 EP2518320B1 (en) 2015-07-01

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CN103824719A (en) * 2012-11-16 2014-05-28 哈尔滨飞机工业集团有限责任公司 Microswitch trigger apparatus
CN112718658A (en) * 2020-12-17 2021-04-30 敖明龙 Plant seed cleaning and drying device

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DE102015113875A1 (en) * 2015-08-21 2017-02-23 Phoenix Contact E-Mobility Gmbh Connector part with a locking element

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EP0263196A1 (en) * 1985-08-29 1988-04-13 WAP Reinigungssysteme GmbH & Co. High pressure cleaning device
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EP1020643B1 (en) 1999-01-14 2004-08-04 WAP Reinigungssysteme GmbH & Co. Pressure safety block for high pressure cleaning apparatus
DE102007021381A1 (en) * 2006-05-08 2007-11-22 Suttner Gmbh Valve arrangement for e.g. high pressure washer, has actuating device and control device formed as modular component, where actuating device is decoupled from closing body of bypass valve and influence on valve with actuating force

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Publication number Priority date Publication date Assignee Title
EP0263196A1 (en) * 1985-08-29 1988-04-13 WAP Reinigungssysteme GmbH & Co. High pressure cleaning device
DE9402554U1 (en) * 1994-02-16 1994-04-07 Alfred Kärcher GmbH & Co, 71364 Winnenden High pressure cleaning device
DE19511201A1 (en) * 1995-03-27 1996-10-02 Sasserath & Co Kg H Water shortage protection appts. for hot water heating system
DE19527854C1 (en) * 1995-07-29 1996-07-18 Kaercher Gmbh & Co Alfred High pressure cleaning equipment
EP1020643B1 (en) 1999-01-14 2004-08-04 WAP Reinigungssysteme GmbH & Co. Pressure safety block for high pressure cleaning apparatus
DE102007021381A1 (en) * 2006-05-08 2007-11-22 Suttner Gmbh Valve arrangement for e.g. high pressure washer, has actuating device and control device formed as modular component, where actuating device is decoupled from closing body of bypass valve and influence on valve with actuating force

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103824719A (en) * 2012-11-16 2014-05-28 哈尔滨飞机工业集团有限责任公司 Microswitch trigger apparatus
CN103824719B (en) * 2012-11-16 2016-03-30 哈尔滨飞机工业集团有限责任公司 A kind of microswitch trigger device
CN112718658A (en) * 2020-12-17 2021-04-30 敖明龙 Plant seed cleaning and drying device
CN112718658B (en) * 2020-12-17 2022-08-19 广西荃鸿农业科技有限公司 Plant seed cleaning and drying device

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EP2518320B1 (en) 2015-07-01

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