EP0764059B1 - Hochdruckreinigungsgerät mit sicherheitsisolierung - Google Patents

Hochdruckreinigungsgerät mit sicherheitsisolierung Download PDF

Info

Publication number
EP0764059B1
EP0764059B1 EP94928358A EP94928358A EP0764059B1 EP 0764059 B1 EP0764059 B1 EP 0764059B1 EP 94928358 A EP94928358 A EP 94928358A EP 94928358 A EP94928358 A EP 94928358A EP 0764059 B1 EP0764059 B1 EP 0764059B1
Authority
EP
European Patent Office
Prior art keywords
cleaning device
pressure cleaning
electrically insulating
housing
pump
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
EP94928358A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0764059A1 (de
Inventor
Josef Schneider
Eberhard Veit
Gabriele Bonezzi
Rudolf Guhs
Johann G. Wesch
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 EP0764059A1 publication Critical patent/EP0764059A1/de
Application granted granted Critical
Publication of EP0764059B1 publication Critical patent/EP0764059B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/146—Swash plates; Actuating elements
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/12—Coating

Definitions

  • the invention relates to a high-pressure cleaning device an electric motor arranged in a housing, one high-pressure pump arranged in a housing, with at least a sealed entering a pump chamber Piston and with a swash plate by the motor shaft of the electric motor and on which the or spring the pistons of the high pressure pump, being the transition from the motor shaft to the swashplate up to the piston or pistons by means of an intermediate layer of an electrically insulating material is.
  • This task is done with a high pressure washer of the type described in the introduction solved that the housing of the electric motor from a pot-shaped housing part and a part of the housing the high pressure pump forming component and that between the stator of the electric motor and the component of the housing an intermediate layer of electrically insulating Plastic is arranged.
  • the housing of the high pressure pump being the housing part closes on one side, for example in the form of a Cover or hood.
  • Optimal electrical separation the engine is now achieved in that between the stator of the electric motor on the one hand and this part the pump housing, which locks the electric motor, introduced an electrically insulating intermediate layer becomes. This makes it possible to make even metallic ones and thus electrically conductive housing for the High pressure pump to use, which is then still opposite the electric motor properly separated electrically are.
  • an intermediate layer made of electrically insulating plastic is arranged between the stator of the electric motor and the cup-shaped housing part of the electric motor. Also in this area of the second Part of the electric motor encapsulation can therefore corresponding electrically insulating intermediate layer is provided so that this part of the encapsulation be made of electrically conductive material can.
  • the motor shaft consists of an electrically insulating plastic.
  • the motor shaft supports in the area where the swash plate is in contact with it, a cap made of electrically insulating plastic.
  • the swash plate on the end face by a Screw is held on the motor shaft with a Head made of electrically insulating plastic material rests on the swashplate. This ensures that on the one hand the high strength properties a metallic screw can be used, on the other hand the screw has no electrical Contact between the swash plate on the one hand and the Motor shaft produces on the other hand.
  • the screw are made of metal and their head can be electric by one insulating coating. It is favorable if the coating on the outside attachment areas for carries a wrench. This is also one in this way provided with a plastic cover Screw can be screwed in in the usual way.
  • the screw metallic power transmission element is arranged, which is embedded in the plastic cover. It can be, for example, a washer act that has a larger outside diameter has as the head of the screw.
  • the swashplate from an electrically insulating Plastic.
  • the swash plate is a Receiving disc on which the piston or pistons apply, and that the washer made of electrically insulating Plastic is made.
  • the swash plate is a Receiving disc on which the piston or pistons apply, and that the washer made of electrically insulating Plastic is made.
  • This intermediate layer is preferably designed as a ring.
  • This ring can carry lugs between the lugs the housing of the pump and the housing part of the electric motor. These approaches too are electrically isolated from each other.
  • the attachment approaches through a screw connected together, made of metal consists of a jacket made of electrically insulating Plastic is surrounded in such a way that the metallic Part of the screw from at least one of the lugs is electrically isolated. It is cheap if the jacket is a receptacle into which the screw is plugged in.
  • the Pump housing with an electrically insulating coating Be provided with plastic or yourself electrically insulating plastic exist.
  • the housing of the Pump a chamber for receiving electrical lines and / or switching elements that are opposite the pump housing with the interposition of an electrical one insulating plastic electrically isolated is. This also applies to the area of electrical supply complete electrical insulation from the Pump and the pump housing, so that a corresponding built up the above description High pressure cleaning device increased safety requirements corresponds.
  • a motor pump unit 2 arranged an electric motor 3 and a high pressure pump 4 comprises.
  • the electric motor 3 is positioned in a pot-shaped housing 5, which on Bottom 6 has a central rotary bearing 7 for a motor shaft 8 has, which is part of a rotor 9. This is from surrounded a stator 10 with a stator winding 11.
  • a film 12 made of an electrically insulating plastic material inserted so that the stator is completely opposite the housing 5 of the electric motor is insulated.
  • the hood 13 takes a pivot bearing 15 for the motor shaft 8, 50 that the Motor shaft 8 mounted between the bearings 7 and 15 is. It penetrates the bottom of the hood 13 and protrudes into a swash plate chamber 16 inside the housing 14 inside.
  • This high pressure pump 4 comprises a plurality of pumping chambers 18, only one is shown in FIG. 1.
  • This pump chamber 18 is via an inlet valve 19 with a suction line 20 in connection and via an outlet valve 21 with a pressure line 22.
  • a cylindrical plunges into the pump chamber 18 Piston 23, which is displaceable in a guide 24 is stored and by a leadership and the piston concentrically surrounding coil spring 25, the on the one hand to the pump chamber 18 and on the other hand a support collar 26 of the piston 23 supports against one annular contact disc 27 is pressed.
  • This is over a ball bearing 28 rotatably mounted in the swash plate, so that when the motor shaft rotates and the swash plate the pistons pressed against the contact disc 27 oscillating in the guide.
  • the motor shaft 8 carries a in the area of the rotary bearing 15 its end overlapping cap 29 made of electrically insulating Plastic, which in the inner ring 30 of a ball bearing 31 engages, which forms the rotary bearing 15. This is an electrical connection between the motor shaft 8 on the one hand and the pivot bearing 15 on the other prevented and thus also an electrical connection between the motor shaft 8 on the one hand and the housing 14 of the High pressure pump on the other hand.
  • the swash plate 17 engages with a central recess 32 the front end of the cap 29 and puts on a level 33 of this cap 29.
  • the recess 32 and the foremost end of the cap 29 may be out of round be, so that swashplate and motor shaft rotatably are interconnected.
  • the swashplate is replaced by a Tensioning screw 34 held on the motor shaft 8, this Tensioning screw 34 is screwed into a threaded bore 35 screwed in the motor shaft 8.
  • the tension screw 34 consists of metal and carries 36 between her head and the threaded portion 37 a support disc 38, the Outside diameter is larger than that of the head 36.
  • the Head 36 and the support disc 38 are together from one electrically insulating plastic that surrounds the shape of a larger head 39 and the upper part of the Embedding washer 34 in itself. This head 39 lies with its underside 40 on the swash plate 17 and presses this axially against the motor shaft 8. This will fixed on the motor shaft.
  • the underside 40 has thereby a central recess 41 into which the cap 29 engages with its front part.
  • a continuous jacket made of electrically insulating Plastic in the area of the end of the motor shaft 8 and the clamping screw 34, in this area are from the outside no metallic parts accessible. With that they are Swashplate and the housing of the motor completely from the motor shaft is electrically insulated.
  • the head 39 can lateral attachment surfaces 42 for one Carry a wrench, for example the head have a hexagonal cross section.
  • the free edge 43 of the hood 13 closes over an intermediate one Ring 44 made of electrically insulating plastic to the edge of the housing 5 of the electric motor, this ring 44 thus insulates the housing 5 of the electric motor from the hood 13 and thus from the housing 14 of the pump.
  • both bear Share side lugs 45, 46 ( Figure 3) one of which one through hole 47 and the other an internally threaded hole 48 has.
  • the ring 44 also points in the area of the approaches 45 and 46 lateral approaches 49 between the approaches 45 and 46 are arranged and these disconnect them electrically.
  • a through hole 50 is also arranged, the with the through bore 47 and the internal threaded bore 48 escapes.
  • a clamping screw 51 inserted into the internal threaded bore 48 is screwed in.
  • a sleeve 52 made of electrically insulating Plastic attached surrounding the clamping screw 51 protrudes into the through bore 47 of the one extension 45 and thereby the clamping screw 51, which is made of metal, electrically separates from the neck 45. It's through this configuration ensured, also through the approaches and the tensioning screws are not electrically conductive Connection in the connection area of the housing 5 and the Housing 14 occurs, although the housing and the screw made of electrically conductive material, especially metal, can exist.
  • a chamber 54 is attached to the housing 14 of the pump, which electrical lines 55 or switching elements receives.
  • This chamber consists of either electrical itself insulating plastic material or it is under the liner of electrically insulating plastic material set electrically separated on the housing 14 of the pump, see above that the lines 55 and electrical switching elements in Inside the chamber 54 through the chamber itself the housing 14 of the pump are electrically isolated.
  • thermosets As an electrically insulating plastic material Polyamides, polyesters, polyurethanes are used or different thermosets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Motor Or Generator Frames (AREA)
  • Insulators (AREA)
  • Compressor (AREA)
EP94928358A 1994-06-17 1994-09-15 Hochdruckreinigungsgerät mit sicherheitsisolierung Expired - Lifetime EP0764059B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4421330 1994-06-17
DE4421330 1994-06-17
PCT/EP1994/003086 WO1995035171A1 (de) 1994-06-17 1994-09-15 Hochdruckreinigungsgerät mit sicherheitsisolierung

Publications (2)

Publication Number Publication Date
EP0764059A1 EP0764059A1 (de) 1997-03-26
EP0764059B1 true EP0764059B1 (de) 1998-12-02

Family

ID=6520900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94928358A Expired - Lifetime EP0764059B1 (de) 1994-06-17 1994-09-15 Hochdruckreinigungsgerät mit sicherheitsisolierung

Country Status (8)

Country Link
US (1) US5886436A (ja)
EP (1) EP0764059B1 (ja)
JP (1) JP2846476B2 (ja)
AT (1) ATE173961T1 (ja)
CA (1) CA2191967C (ja)
DE (2) DE9421814U1 (ja)
DK (1) DK0764059T3 (ja)
WO (1) WO1995035171A1 (ja)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19632606A1 (de) * 1996-08-13 1998-02-19 Kaercher Gmbh & Co Alfred Verdrängerpumpe, insbesondere für Hochdruckreinigungsgeräte
US6092998A (en) * 1998-03-20 2000-07-25 Devilbiss Air Power Company Pump for a pressure washer
DE29813978U1 (de) 1998-08-05 1998-10-01 Kaercher Gmbh & Co Alfred Motorpumpeneinheit für ein Hochdruckreinigungsgerät
EP1254517B2 (en) * 1999-12-14 2009-02-11 Broadcom Corporation Frequency division/multiplication with jitter minimization
DE19963703A1 (de) * 1999-12-29 2001-07-05 Bsh Bosch Siemens Hausgeraete Antriebsvorrichtung für eine Waschmaschine
US6892957B2 (en) * 2002-08-29 2005-05-17 Black & Decker Inc. Pressure washer with improved mobility
ITPD20030013U1 (it) * 2003-02-25 2004-08-26 Lavorwash Spa Piattello oscillante per pompa a pistoni assiali
DE102004056019A1 (de) * 2004-11-16 2006-05-24 Alfred Kärcher Gmbh & Co. Kg Taumelantrieb
GB0509982D0 (en) * 2005-05-17 2005-06-22 Johnson Electric Sa Electric motor
US7579724B2 (en) * 2006-06-02 2009-08-25 General Electric Company Methods and apparatus for using an electrical machine to transport fluids through a pipeline
US10328838B2 (en) 2016-01-28 2019-06-25 Kärcher North America, Inc. Utility trailer with multiple modes of conveyance and operation
USD793911S1 (en) 2016-01-28 2017-08-08 Kärcher North America, Inc. Trailer device
US20180327106A1 (en) * 2017-05-09 2018-11-15 Gulfstream Aerospace Corporation Fuel system for an aircraft
US11008115B2 (en) 2017-05-09 2021-05-18 Gulfstream Aerospace Corporation Fuel system for an aircraft
JP7348286B2 (ja) * 2018-12-20 2023-09-20 アルフレッド ケルヒャー エスエー ウント コンパニー カーゲー 高圧洗浄器具

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2259900A1 (de) * 1972-12-07 1974-06-12 Bosch Gmbh Robert Handwerkzeugmaschine
DE2837254A1 (de) * 1978-08-25 1980-03-06 Hilti Ag Handbohrmaschine mit elektrischem antriebsmotor
DE3243212A1 (de) * 1982-11-23 1984-05-24 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Elektrischer kleinmotor mit einem anker
DE8536175U1 (de) * 1986-02-05 1987-07-02 Alfred Kärcher GmbH & Co, 7057 Winnenden Flüssigkeitsgekühlter Elektromotor
WO1988009077A1 (en) * 1987-05-08 1988-11-17 Firma Karl Lutz Electric motor, in particular a drive motor for a drum pump or submersible pump
JPS6477771A (en) * 1987-09-18 1989-03-23 Hitachi Ltd Variable delivery compressor
DK595787D0 (da) * 1987-11-13 1987-11-13 Westergaard Knud Erik Hoejtryksrenser
US4992690A (en) * 1988-10-07 1991-02-12 Emerson Electric Co. Combination motor endshield and pump housing
DE3931814A1 (de) * 1989-09-23 1991-04-04 Black & Decker Inc Handgefuehrter hochdruckreiniger
DE4039926C2 (de) * 1990-09-19 1994-08-11 Elektra Beckum Ag Axialkolbenpumpe, insbesondere für Wasser-Hochdruckreiniger
WO1992016774A1 (de) * 1991-03-13 1992-10-01 Ina Wälzlager Schaeffler Kg Taumellagerung
JP2730319B2 (ja) * 1991-04-26 1998-03-25 日本ビクター株式会社 磁気ディスク装置
DE69301254T2 (de) * 1992-02-28 1996-08-22 Leduc Rene Hydro Sa Hydraulische Kolbenpumpe mit Einlassventilen
DK167178B1 (da) * 1992-03-17 1993-09-13 Westergaard Knud E Ind As Hoejtryksrenser med indkapslet motor-pumpeaggregat
DE9320361U1 (de) * 1993-11-15 1994-05-19 Suttner Gmbh & Co Kg, 33689 Bielefeld Axialkolbenpumpe
DE4338896C2 (de) * 1993-11-15 1997-03-13 Suttner Gmbh & Co Kg Axialkolbenpumpe

Also Published As

Publication number Publication date
EP0764059A1 (de) 1997-03-26
DK0764059T3 (da) 1999-08-16
US5886436A (en) 1999-03-23
CA2191967C (en) 2000-03-21
DE59407409D1 (de) 1999-01-14
ATE173961T1 (de) 1998-12-15
WO1995035171A1 (de) 1995-12-28
JP2846476B2 (ja) 1999-01-13
JPH09509602A (ja) 1997-09-30
DE9421814U1 (de) 1996-10-24

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