EP0756902B1 - Dispositif de nettoyage à haute pression - Google Patents

Dispositif de nettoyage à haute pression Download PDF

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Publication number
EP0756902B1
EP0756902B1 EP96112065A EP96112065A EP0756902B1 EP 0756902 B1 EP0756902 B1 EP 0756902B1 EP 96112065 A EP96112065 A EP 96112065A EP 96112065 A EP96112065 A EP 96112065A EP 0756902 B1 EP0756902 B1 EP 0756902B1
Authority
EP
European Patent Office
Prior art keywords
switch
pressure
cleaning device
switching
pressure cleaning
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.)
Expired - Lifetime
Application number
EP96112065A
Other languages
German (de)
English (en)
Other versions
EP0756902A1 (fr
Inventor
Robert Nathan
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
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 Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP0756902A1 publication Critical patent/EP0756902A1/fr
Application granted granted Critical
Publication of EP0756902B1 publication Critical patent/EP0756902B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms

Definitions

  • the invention relates to a high-pressure cleaning device an electric motor, one driven by it High pressure pump and with an automatic shutdown for the electric motor, which comprises a switch that one of the pressure or the flow of that of the high pressure pump pumped liquid depending movable Actuator is switchable.
  • Such a high pressure pump is described for example in DE 42 21 286 A1.
  • the known shutdown device includes a slidably mounted Tappet that acts on a microswitch and so on actuates that the power supply to the electric motor is interrupted will when certain pressure or flow conditions occur, for example when the fluid release prevented by closing the discharge line will or if the pump is not enough Liquid is added.
  • Pressure or flow sensors that provide the desired operating conditions monitor and switch to a circuit can lead such emergency shutdown. So is in the frame DE 42 21 286 A1 describes that a sensor element is provided directly in the discharge line is installed and any possible overpressure upstream of the line and thus accordingly leads to a shutdown.
  • the object of the invention is a high-pressure cleaning device of the generic type so that the mentioned switching operations with less effort can be carried out.
  • both the emergency shutdown and the main shutdown Switch is still operated by the mechanical Actuating element actuated, depending on the flow or pressure is moved and lead to an emergency shutdown can, if corresponding maximum values are exceeded become.
  • the same switch also acts another switch-off element, the same switch can move to the off position, independently from the respective position of the actuating element. So that the device can go through this at any time Switch-off element can be switched off, a special one Switch is no longer necessary.
  • the switch-off element in the switch-off position is fixable, for example by locking the Switch-off element. This ensures that this consciously set position is maintained, the device remains switched off when the switch-off element is moved to the off position.
  • the switch-off element switches between shifts two positions and the actuator the switch only in one of these two positions reached for switching. So it will be the switch moved so far by the switch-off element that the Do not continue to operate the switch can only if the switch by the switch-off element is approximated to the actuator, is at all switching the switch by the actuating element possible. If the switch is not pressed, the engine is switched off, only when the The engine runs.
  • the switch on High pressure cleaning device is pivotally mounted and if the switch-off element switches between two Positions pivoted.
  • the switch-off element is a rotatable one Is eccentric.
  • the actuator is a pivot lever is that abuts a switching projection of the switch and the one promoted by the pressure or flow of the Fluid-dependent sliding plunger is pivotable. This is a redirection of the movement of the ram possible, for example, the displacement of the switching element of the switch transverse to the displacement of the ram.
  • the actuator one to the switching element of the switch that can be created and in Depends on the pressure or flow of the pumped Liquid is so displaceable that the Button actuated the switching element in one position and in another not, and that the actuator can also be moved by hand in such a way that the button only in one position on the switching element can be created.
  • the switching element itself is therefore moved to a position for permanent shutdown, in which the button of the switching element Switch can not reach, so even with one Displacement of the actuator under the influence the pressure or the flow of the cleaning liquid no switching process can occur.
  • the actuating element rotatable about an axis of rotation and depending on Pressure or from the flow of cleaning fluid is slidable along the axis of rotation and when it is on its outer circumference is limited Circumferential angle extending one in the axial direction different distance from the axis of rotation Bears button.
  • the button In an angular position of the actuating element the button by axially moving the actuator operate the switching element of the switch, in a different angular position, however, the button not applied to the switching element of the switch be independent of the respective axial Position of the actuator.
  • the actuator is rotatably and axially freely movable with a switching element designed as a rotating element connected is.
  • a particularly preferred embodiment is thereby characterized in that the actuator as Sleeve is formed, in which a pin of the switch-off element protrudes that at the bottom of the sleeve one of Pressure or flow of the cleaning liquid dependent sliding plunger rests and that between the switch-off element and the sleeve one against the plunger pressing spring is arranged. It follows from this a very compact unit consisting of an actuator and switch-off element.
  • Axial piston pump 3 includes.
  • the piston 4 of the axial piston pump 3 are by springs on the swash plate drive 2 pressed and by this reciprocating in Pump chambers 5 moves.
  • a piston 9 is sealed and slidably supported, by a spring arranged in the control chamber 8 10 is applied.
  • the piston 9 separates the control chamber 8 into two chambers, namely a first chamber 11, which has a control line 12 with an injector-like constriction 13 of the Pressure line 6 communicates, and into a chamber 14, which is not clearly visible in the drawing Way upstream of the constriction 13 with the pressure line 6 communicates. Thereby prevail in the Chambers 11 and 14 the pressures, which are each in the range the constriction 13 or in the area of the upstream adjust the arranged pressure line 6.
  • the piston 9 is sealed with a from the control chamber 8 brought out plunger 15 which the Switch tongue 16 of a microswitch 17 faces; this microswitch 17 is on the axial piston pump 3 in a suitable, not shown in the drawing Way attached.
  • switch-off element 18 mounted from the outside of the high-pressure cleaning device can be rotated is.
  • this switch-off element 18 be provided with a control shaft, which consists of a housing 19 of the high-pressure cleaning device led outwards is, this is not shown in the drawing.
  • the switch-off element 18 carries a lateral one Projection 20, the at a first angular position Switch-off element 18 from the switching tongue 16 of the microswitch 17 is removed ( Figure 2) in another However, the angular position rests on the switching tongue 16 and thereby actuated the microswitch 17 ( Figure 3), the is called the microswitch 17 thereby interrupts Power supply to the electric motor 1.
  • the switch-off element 18 is in addition to the plunger 15 arranged that both the switch-off element 18 and the plunger 15 the same switch tongue 16 in the off position of the microswitch 17 can move. If the switching element 18 the microswitch 17 in the Switched off position shifts, the switch-off element 18 fixed in this switch-off position, for example done by an elastic catch, by which rastered the rotational movement of the switch-off element 18 he follows. This notch is not in the drawing shown.
  • the high-pressure cleaning device When the high-pressure cleaning device is operating, it switches the operator first the switch-off element 18 from the Switch-off position ( Figure 3) in the operating position ( Figure 2). The device is now switched on, the electric motor 1 will only start to run when a Pressure difference is built up in the chambers 11 and 14, if so also the plunger 15 in the retracted Position is shifted.
  • the microswitch 17 is used exclusively switched by the plunger 15 since the switch-off element 18 acts as a switch and remains switched on. If however, the user at the end of the operation of the device wants to shut down, he can do this via the switch-off element 18 in a simple way, then it is enough that Turning off element 18 to the off position.
  • the plunger 15 in another way for emergency shutdown can be moved.
  • the plunger is switched by a Difference in pressure in the pressure line, would be basically it is also possible to use other switching variables to actuate the To provide plunger 15, for example, the plunger depending on the temperature to be switched off if the liquid heats up too much enable, other possibilities are also conceivable.
  • the only important thing is that in addition to the company-dependent Displacement of the plunger or one another actuator of the microswitch 17 a additional manual switch-off option of the same Switch is provided.
  • both the actuating element and the switch-off element act on a common switching tongue 16 of the switch.
  • the actuating element switches only in a certain position of the switch-off element of the switch depending on pressure or flow of the cleaning liquid, but not in another position of the switch-off element.
  • the high-pressure cleaning device itself can be constructed in the same way become as in the embodiment of the figures 1 to 3, corresponding parts therefore carry the same Reference numerals.
  • FIGS. 1 to 3 In contrast to the exemplary embodiment in FIGS. 1 to 3 is in the embodiment of Figures 4 to 6 of the microswitch 17 rotatable about an axis of rotation 21 High pressure cleaning device stored.
  • a V-shaped spiral spring 22 rests with an arm 23 on the microswitch 17 and with the other arm 24 on the high-pressure cleaning device itself and thereby pivots the microswitch 17 against a stop not shown in the drawing. In this position, the extended in Figure 6 The switch is located in its operating position.
  • a swivel lever 25 is located on the high-pressure cleaning device pivoted, one arm 26 a resilient switching element which can be pressed into the microswitch 17 27 is opposite and on its other arm 28 Plunger 15 abuts in the same way as the plunger 15 in the embodiment of Figures 1 to 3 depending of pressure and / or flow of the material to be pumped Liquid can be moved, but this one illustrated embodiment in the reverse direction, in contrast to the exemplary embodiment of Figures 1 to 3 takes place in this embodiment a shutdown of the engine when the plunger is in the high-pressure cleaning device is retracted removed from the pivot lever 25. If the plunger 15 however, advanced, it pivots the pivot lever 25 and presses it with his arm 26 against the switching element 27, taking care that the spiral spring 22 is so strong that it evades of the microswitch 17 prevented.
  • the high-pressure cleaning device is by means of a rotary handle 29 rotatably mounted an eccentric 30 in a Position of the microswitch 17 is removed in the second position, shown in phantom in FIG. 6 is, however, on the microswitch 17 to the system comes and this against the action of the spiral spring 22nd pivoted so far that the pivot lever 25 at each Position by moving the plunger 15 occupies the switching element 27 can no longer reach.
  • the switching element 27 therefore remains in this pivoted Position of the microswitch 17 in any case not actuated, and this leads to the engine becoming permanent remains off.
  • the rotary handle 29 thus forms together with the eccentric 30 a switch-off element with which the motor permanently can be turned off while in the operating state a shutdown of the engine depending on the pressure or from the flow of the liquid over the plunger 15 and the pivot lever 25 can be done. Also done here the switching on and off of the motor depending the pressure or the flow of the liquid on the one hand and switching the engine on and off Start and end of the operating phase via a single Microswitch 17.
  • the microswitch 17 is fixed here on the high-pressure cleaning device held, right next to the microswitch 17 is a sleeve-shaped actuating element 31 transversely to the direction of displacement of the switching element 27 of the microswitch 17 axially displaceable on the high-pressure cleaning device stored.
  • the sleeve-shaped actuating element 31 on its top and bottom each of a cylindrical guide 32 and 33 surrounded, in addition to the limited axial displacement of the actuating element 31 store this also rotatable about its longitudinal axis.
  • a sleeve 34 protrudes a pin 34th of a rotary handle arranged on the high-pressure cleaning device 35 in, this forms together with the pen 34 the switch-off element of this arrangement.
  • the pin 34 is axial with the sleeve-shaped actuating element 31 freely movable and rotatably connected, so that at a rotation of the rotary handle 35 also the sleeve-shaped Actuator 31 is rotated about its axis of rotation.
  • Compression spring 38 arranged the sleeve-shaped actuating element 31 presses against a plunger 15, the the bottom of the bottom 37 abuts and in the direction the axis of rotation of the actuator 31 in dependence the pressure or the flow of the funded Liquid is displaceable.
  • the sleeve-shaped actuator 31 carries on his Scope a switching cam 39, which extends in the circumferential direction only extends over a small angular range and which also has a limited extent in the axial direction Has.
  • the most distant surface from the axis of rotation of the switching cam 39 forms a button 40, via an inclined sliding surface 41 into the peripheral surface of the sleeve-shaped actuating element 31 passes over.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Cyclones (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Claims (14)

  1. Appareil de nettoyage à haute pression comportant un moteur électrique, une pompe à haute pression entraínée par celui-ci et un système automatique de coupure pour le moteur électrique, lequel comporte un commutateur qui est commutable par un élément d'actionnement susceptible d'être déplacé en fonction de la pression ou de l'écoulement du liquide refoulé par la pompe à haute pression, caractérisé en ce qu'au même commutateur (17) est associé un élément de coupure (18 ; 29, 30 ; 34, 35), lequel est susceptible d'être actionné à la main sur l'appareil de nettoyage à haute pression, de sorte que dans une position de l'élément de coupure (18 ; 29, 30 ; 34, 35), le commutateur (17) interrompt l'amenée de courant vers le moteur électrique (1) indépendamment de la pression ou l'écoulement du liquide refoulé tandis que dans l'autre position, le commutateur (17) est commutable par l'élément d'actionnement (15).
  2. Appareil de nettoyage à haute pression selon la revendication 1, caractérisé en ce que l'élément de coupure (18 ; 29, 30 ; 34, 35) est susceptible d'être fixé dans la position de coupure.
  3. Appareil de nettoyage à haute pression selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que non seulement l'élément d'actionnement (15), mais aussi l'élément de coupure (18) sont susceptible d'être déplacés contre un élément de commutation (16) du commutateur (17) et en ce que l'élément de commutation (16) est ici déplacé dans la position de coupure du commutateur (17).
  4. Appareil de nettoyage à haute pression selon la revendication 3, caractérisé en ce que le commutateur (17) est un microcommutateur avec un bras de commutation.
  5. Appareil de nettoyage à haute pression selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que l'élément de coupure (29, 30) déplace le commutateur (17) entre deux positions et en ce que l'élément d'actionnement (25) n'atteint le commutateur (17) que dans l'une de ces deux positions, pour la commutation.
  6. Appareil de nettoyage à haute pression selon la revendication 5, caractérisé en ce que le commutateur (17) est monté à pivotement sur l'appareil de nettoyage à haute pression, et en ce que l'élément de coupure (29, 30) pivote le commutateur (17) entre deux positions.
  7. Appareil de nettoyage à haute pression selon l'une ou l'autre des revendications 5 et 6, caractérisé en ce que le commutateur (17) est poussé par un ressort (22) contre l'élément d'actionnement (25).
  8. Appareil de nettoyage à haute pression selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de coupure (18 ; 29, 30) est un excentrique rotatif.
  9. Appareil de nettoyage à haute pression selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément d'actionnement (25) est un levier de pivotement qui est appliqué sur un ergot de commutation (27) du commutateur (17) et qui est susceptible d'être pivoté par un poussoir (15) déplaçable en fonction de la pression ou de l'écoulement du liquide refoulé.
  10. Appareil de nettoyage à haute pression selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'élément d'actionnement (31) porte une surface de commutation (40) susceptible d'être mise en appui sur l'organe de commutation (27) du commutateur (17) et en ce qu'il est déplaçable en fonction de la pression ou de l'écoulement du liquide refoulé de telle sorte que dans une position, la surface de commutation (40) actionne l'organe de commutation (27) et dans une autre position, elle ne l'actionne pas, et en ce que l'élément d'actionnement (31) est additionnellement déplaçable à la main de telle sorte que la surface de commutation (40) ne peut être mise en appui contre l'organe de commutation (27) que dans une seule position.
  11. Appareil de nettoyage à haute pression selon la revendication 10, caractérisé en ce que l'élément d'actionnement (31) est rotatif autour d'un axe de rotation et déplaçable le long de l'axe de rotation en fonction de la pression ou de l'écoulement du liquide et en ce qu'il porte sur sa périphérie extérieure une surface de commutation (40) qui ne s'étend que sur un angle périphérique délimité, et présentant en direction axiale un écartement différent de l'axe de rotation.
  12. Appareil de nettoyage à haute pression selon la revendication 11, caractérisé en ce que pour déplacer axialement l'élément d'actionnement (31) un poussoir (15), déplaçable en fonction de la pression ou de l'écoulement du liquide, est en contact avec celui-ci.
  13. Appareil de nettoyage à haute pression selon l'une ou l'autre des revendications 11 et 12, caractérisé en ce que l'élément d'actionnement (31) est relié solidaire en rotation et librement déplaçable axialement avec un élément de coupure (34, 35) réalisé sous forme d'organe rotatif.
  14. Appareil de nettoyage à haute pression selon la revendication 13, caractérisé en ce que l'élément d'actionnement (31) est réalisé sous forme de douille dans laquelle fait saillie une goupille de l'élément de coupure (34, 35), en ce qu'un poussoir (15) déplaçable en fonction de la pression ou de l'écoulement du liquide repose sur le fond (37) de la douille, et en ce que, entre l'élément de coupure (34, 35) et la douille, est agencé un ressort (38) pressant celle-ci contre le poussoir (15).
EP96112065A 1995-07-29 1996-07-26 Dispositif de nettoyage à haute pression Expired - Lifetime EP0756902B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19527854 1995-07-29
DE19527854A DE19527854C1 (de) 1995-07-29 1995-07-29 Hochdruckreinigungsgerät

Publications (2)

Publication Number Publication Date
EP0756902A1 EP0756902A1 (fr) 1997-02-05
EP0756902B1 true EP0756902B1 (fr) 1999-01-13

Family

ID=7768166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96112065A Expired - Lifetime EP0756902B1 (fr) 1995-07-29 1996-07-26 Dispositif de nettoyage à haute pression

Country Status (7)

Country Link
US (1) US6062822A (fr)
EP (1) EP0756902B1 (fr)
AT (1) ATE175595T1 (fr)
BR (1) BR9609949A (fr)
DE (1) DE19527854C1 (fr)
DK (1) DK0756902T3 (fr)
WO (1) WO1997004888A1 (fr)

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CN106040643A (zh) * 2016-06-15 2016-10-26 魏会芳 一种带有自动清洁的电力启动装置

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AU1965701A (en) * 1999-10-22 2001-05-08 Wagner Spray Tech Corporation Piston pump
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DE10053248A1 (de) * 2000-10-26 2002-05-08 Kaercher Gmbh & Co Alfred Hochdruckreinigungsgerät
DE102004063201A1 (de) * 2004-12-23 2006-07-06 Alfred Kärcher Gmbh & Co. Kg Flächenreinigungsgerät
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US20090317262A1 (en) * 2006-07-17 2009-12-24 Briggs & Stratton Corporation Engine speed control for pressure washer
US8038413B2 (en) * 2006-07-17 2011-10-18 Briggs And Stratton Corporation Idle down control for a pressure washer
US20100282862A1 (en) * 2009-05-06 2010-11-11 Briggs & Stratton Corporation Pressure washer with throttle control
US20110142685A1 (en) * 2009-12-16 2011-06-16 Briggs & Strantton Corporation Pump unloader valve and engine throttle system
CN102208289B (zh) * 2010-03-29 2013-06-26 香港尚德-富佑捷有限公司 开关装置及其制作和使用方法
JP6046333B2 (ja) * 2011-04-14 2016-12-14 リョービ株式会社 高圧洗浄機
DE202011005630U1 (de) * 2011-04-27 2014-02-07 Nilfisk-Advance A/S Regelsicherheitsblock für Hochdruck-Reinigungsgeräte mit Schalteinrichtung
CN102755971B (zh) * 2012-07-18 2014-05-07 梁福根 高压清洗机气囊球压力控制器
CN105435986A (zh) * 2015-12-19 2016-03-30 台州市正茂动力工具有限公司 一种高压清洗机关枪停机装置
CN107234082B (zh) * 2017-05-10 2019-08-23 浙江光跃环保科技股份有限公司 一种便捷的生化仪器清洗设备
CN110891700B (zh) * 2017-08-16 2022-05-13 阿尔弗雷德·卡赫欧洲两合公司 高压清洗机

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Publication number Priority date Publication date Assignee Title
CN106040643A (zh) * 2016-06-15 2016-10-26 魏会芳 一种带有自动清洁的电力启动装置

Also Published As

Publication number Publication date
ATE175595T1 (de) 1999-01-15
US6062822A (en) 2000-05-16
WO1997004888A1 (fr) 1997-02-13
EP0756902A1 (fr) 1997-02-05
DK0756902T3 (da) 1999-08-30
DE19527854C1 (de) 1996-07-18
BR9609949A (pt) 1999-02-02

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