EP3898016B1 - High pressure cleaning device - Google Patents

High pressure cleaning device Download PDF

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Publication number
EP3898016B1
EP3898016B1 EP18826049.1A EP18826049A EP3898016B1 EP 3898016 B1 EP3898016 B1 EP 3898016B1 EP 18826049 A EP18826049 A EP 18826049A EP 3898016 B1 EP3898016 B1 EP 3898016B1
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EP
European Patent Office
Prior art keywords
pressure cleaning
high pressure
cleaning appliance
support plate
accordance
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.)
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Application number
EP18826049.1A
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German (de)
French (fr)
Other versions
EP3898016A1 (en
EP3898016C0 (en
Inventor
Gerd Ruoff
Kai Trautwein
Wolfgang Müller
Bernd KÖRNER
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
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Publication date
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Publication of EP3898016A1 publication Critical patent/EP3898016A1/en
Application granted granted Critical
Publication of EP3898016B1 publication Critical patent/EP3898016B1/en
Publication of EP3898016C0 publication Critical patent/EP3898016C0/en
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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
    • F04B1/128—Driving means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/027—Pump details

Definitions

  • the invention relates to a high-pressure cleaning device having the features of the preamble of patent claim 1.
  • a cleaning fluid preferably water
  • the axial piston pump has a number of pistons that can be moved back and forth linearly with the aid of a swash plate.
  • the swash plate is coupled to an electric motor via a planetary gear.
  • the electric motor, the planetary gear, the swash plate and the axial piston pump are arranged one behind the other in a longitudinal direction of the high-pressure cleaning device.
  • the well-known high-pressure cleaning device has a not inconsiderable length.
  • a high-pressure cleaning device with the features of the preamble of claim 1 is from the publication U.S. 2017/03503386 A1 known.
  • the object of the present invention is to further develop a high-pressure cleaning device of the type mentioned at the outset in such a way that it has a compact design and high mechanical stability and can be produced inexpensively.
  • the axial piston pump is arranged radially offset from the motor shaft and the linear movement of the at least one piston runs parallel to the motor shaft.
  • the swash plate is connected to an output shaft which is aligned parallel to the motor shaft, the motor shaft in combination with the gearbox and the output shaft forming a U-shaped drive train.
  • a first leg of the U-shaped drive train is formed by the motor shaft, and a second leg of the U-shaped drive train is formed by the output shaft, which is coupled to the motor shaft via the gearbox.
  • the motor shaft and the output shaft therefore protrude from the gearbox in the same direction.
  • the motor shaft is preferably longer than the output shaft.
  • Such an embodiment makes it possible to reduce the length of the high-pressure cleaning device and to give the high-pressure cleaning device a compact design.
  • the pistons of the axial piston pump are driven by the swashplate in reciprocating linear motion, the linear motion being parallel to the motor shaft.
  • the linear motion being parallel to the motor shaft.
  • not only the length but also the width of the high-pressure cleaning device can be kept relatively small.
  • the use of the axial piston pump and the swash plate also makes it possible to keep the production costs of the high-pressure cleaning device relatively low, since these components can be produced inexpensively in large numbers.
  • the electric motor has a bearing plate on which the motor shaft is rotatably mounted, the bearing plate being held on a support part on which the output shaft is rotatably mounted.
  • the swash plate is driven and, via this, the at least one piston of the axial piston pump is also driven via the output shaft, which is coupled to the motor shaft via the transmission.
  • the output shaft is held on a support part that gives the high-pressure cleaning device high mechanical stability.
  • the electric motor is preferably arranged above the swash plate and the axial piston pump when the high-pressure cleaning device is in a horizontal position of use, in which the motor shaft is aligned horizontally.
  • the supporting part consists at least partially, preferably completely, of metal, for example of an aluminum alloy.
  • the support part has a support plate.
  • the support plate enables a particularly compact configuration of the high-pressure cleaning device.
  • the support plate is aligned vertically when the high-pressure cleaning device is in a horizontal position of use.
  • the bearing plate is adjustably held on the support plate.
  • the adjustability of the bearing plate enables the bearing plate to be adjusted when the high-pressure cleaning device is installed.
  • the end shield is preferably screwed to the support plate. It is favorable here if the support plate has oblong holes through which connecting screws pass. By loosening the connecting screws, the end shield and with it the entire electric motor of the high-pressure cleaning device can be adjusted relative to the support plate.
  • the elongated holes extend in a vertical direction when the high-pressure cleaning device is in a horizontal position of use.
  • a particularly compact and mechanically strong configuration is achieved in an advantageous embodiment of the high-pressure cleaning device according to the invention in that the supporting part has a housing part which is integrally connected to the supporting plate and surrounds the swash plate in the circumferential direction.
  • the one-piece connection of the support plate to the housing part gives the support part a particularly high mechanical load capacity.
  • the housing part can be designed, for example, in the form of a cylinder jacket, the cylinder axis of which is preferably aligned parallel to the motor shaft.
  • the housing part which surrounds the swash plate in the circumferential direction, advantageously protrudes from the side of the support plate facing the axial piston pump.
  • the electric motor preferably has a motor housing with at least one air inlet opening, through which the cooling air can flow into the motor housing, and at least one air outlet opening, through which the cooling air can flow out of the motor housing, the cooling air being able to be fed to the housing part surrounding the swash plate via the air outlet opening.
  • the cooling air can first flow through the motor housing in order to cool the electric motor, and can then flow around the housing part that contains the swash plate surrounds, so that this part of the housing can be cooled by the cooling air.
  • the cooling air can preferably be deflected within the motor housing, in particular by 90°.
  • the support part has a bearing sleeve which is connected in one piece to the support plate and on which the output shaft is rotatably mounted. It is favorable here if the bearing sleeve is surrounded by the housing part, which also surrounds the swash plate in the circumferential direction.
  • a particularly high degree of rigidity of the supporting part is achieved in that the supporting part has a reinforcing element which is connected in one piece to the supporting plate.
  • the reinforcement element can be designed, for example, in the form of a reinforcement rib.
  • the reinforcing element has an annular wall which protrudes from the side of the supporting plate facing away from the electric motor and the axial piston pump and is integrally connected to the supporting plate.
  • the annular wall can be designed in the manner of a collar, which protrudes from the support plate and gives it a very high level of rigidity.
  • the ring wall projects perpendicularly from the support plate.
  • the ring wall surrounds a gear chamber in the circumferential direction, in which the gear is arranged.
  • the high-pressure cleaning device preferably has a gear cover which is held on the annular wall.
  • the gear cover in combination with the annular wall and the support plate, defines the gear space that accommodates the gear.
  • a soundproofing element for example an insulating mat, is preferably arranged on the inside of the cover facing the gear compartment.
  • the support part has connecting elements for connecting the support part to an outer housing of the high-pressure cleaning device.
  • the connecting elements can be configured, for example, as recesses into which support pins arranged on the outer housing of the high-pressure cleaning device dip.
  • the transmission of the high-pressure cleaning device according to the invention can be designed, for example, in the form of a spur gear.
  • the transmission of the high-pressure cleaning device is designed as a traction mechanism, for example in the form of a chain drive.
  • the transmission is designed as a belt drive.
  • a first pulley can be non-rotatably connected to the motor shaft and a second pulley can be non-rotatably connected to the output shaft, and a belt, preferably a toothed belt, can loop around the two pulleys.
  • the high-pressure cleaning device is denoted overall by the reference numeral 10 and has an outer housing 12 with a first housing shell 14 and a second housing shell, not shown in the drawing to provide a better overview, which is shown in figure 1 is hidden.
  • the outer housing 12 surrounds a motor pump unit 16 and has two support feet 18, 20 with which the high-pressure cleaning device 10 can be parked on a standing surface 22 in a horizontal position of use shown in the drawing.
  • the motor-pump unit 16 has an electric motor 24 which drives an axial piston pump 30 via a transmission designed as a belt drive 26 in the illustrated embodiment and a swash plate 28 .
  • the axial piston pump 30 has a liquid inlet 32 and a liquid outlet 34 .
  • a liquid supply line preferably a supply hose, can be connected to the liquid inlet 32 .
  • the axial piston pump 30 can be supplied with cleaning liquid to be pressurized, preferably water.
  • a liquid outlet line, preferably a pressure hose can be connected to the liquid outlet 34 .
  • the cleaning liquid that is pressurized by the axial piston pump 30 can be discharged via the liquid outlet line. This allows the pressurized cleaning liquid to be directed at an object to be cleaned.
  • the axial piston pump 30 has a total of three identically configured pistons, with figure 4 to achieve a better overview, only a first piston 36 and a second piston 38 are shown.
  • Such axial piston pumps are known per se to a person skilled in the art and therefore do not require a detailed description here.
  • the pistons 36, 38 are each driven by the swash plate 28 in a reciprocating linear movement, under the action of which liquid can be drawn in from the liquid inlet 32, pressurized and then discharged via the liquid outlet 34.
  • the axial piston pump 30 comprises pump chambers known per se, into which a piston 36, 38 dips, as well as suitable inlet and outlet valves, via which the liquid is supplied to the pump chambers and discharged from the pump chambers.
  • the linear movement of the pistons 36, 38 is in figure 4 illustrated by the double arrow 40 and runs parallel to the longitudinal axis 42 of a motor shaft 44 of the electric motor 24, which is arranged above the axial piston pump 30 and the swash plate 28. Relative to the longitudinal axis 42 , the axial piston pump 30 is arranged radially offset from the motor shaft 44 .
  • the motor shaft 44 is rotatably mounted on a bearing plate 46 and a further bearing part 48 .
  • a first end section 50 of the motor shaft 44 protrudes from the further bearing part 48 on the side of the further bearing part 48 facing away from the bearing plate 46 and is connected to a fan wheel 52 in a rotationally fixed manner.
  • a second end portion 54 of the motor shaft 44 protrudes on the further Bearing part 48 facing away from the bearing plate 46 out of the bearing plate 46 and is rotatably connected to a first pulley 56 of the belt drive 26.
  • a second pulley 58 of the belt drive 26 is connected in a torque-proof manner to an output shaft 60 whose longitudinal axis 62 is aligned parallel to the longitudinal axis 42 of the motor shaft 44 .
  • the output shaft 60 is non-rotatably connected to the swash plate 28 .
  • a belt 64 wraps around the first pulley 56 and the second pulley 58 so that the movement of the motor shaft 44 is transmitted via the first pulley 56, the belt 64 and the second pulley 58 to the output shaft 60 and from there to the swashplate 28 whose end face 66 facing away from the output shaft 60 bears the pistons 36, 38 of the axial piston pump 30 resiliently, so that they are driven by the swash plate 28 to perform the already mentioned reciprocating linear movement.
  • the motor shaft 44 in combination with the belt drive 26 and the output shaft 60 forms a U-shaped drive train, via which the electric motor 24 is connected to the swash plate 28, which drives the pistons 36 and 38 in a reciprocating linear movement .
  • the motor shaft 44 is designed to be longer than the output shaft 60 and forms a first leg of the U-shaped drive train.
  • the output shaft 60 forms a second leg of the U-shaped drive train and is coupled to the motor shaft 44 via the belt drive.
  • the fixing of the electric motor 24 in such a way that the axial piston pump 30 is arranged offset in the radial direction relative to the motor shaft 22 with respect to the longitudinal axis 42 and the linear movement of the pistons 36, 38 is aligned parallel to the longitudinal axis of the motor shaft 44 is carried out with the aid of a rigidly designed support part 70 , which consists of an aluminum alloy in the illustrated embodiment.
  • the electric motor 24 is arranged above the axial piston pump 30 and the swash plate 28 in the exemplary embodiment shown when the high-pressure cleaning device assumes a horizontal position of use.
  • the support part 70 has a support plate 72 which is aligned vertically in the horizontal position of use of the high-pressure cleaning device 10 shown in the drawing. This is in particular from the Figures 3 and 4 clearly.
  • the bearing plate 46 of the electric motor 24 is held on the support plate 72 so that it can be adjusted in the vertical direction.
  • the support plate 72 forms a support flange 74, which has a central opening 76 and elongated holes 78, 80, 82, 84 arranged on both sides of the central opening 76, through which a connecting screw 86 passes in each case, with the aid of which the end shield 46 the support plate 72 is screwed.
  • the second end section 54 of the motor shaft 44 passes through the central opening 76 of the support flange 74 and carries the first pulley 56 already mentioned above.
  • the support part 70 has a housing part 88 which forms a cylindrical housing shell 90 which surrounds the swash plate 28 in the circumferential direction and is connected to the support plate 72 in one piece.
  • the supporting part 70 also has a bearing sleeve 92 on which the output shaft 60 is rotatably mounted and which, like the swash plate 28 , is surrounded by the housing casing 90 .
  • the bearing sleeve 92 is also connected to the support plate 72 in one piece.
  • the support part 70 also has a reinforcement element 94 which is connected in one piece to the support plate 72 and additionally increases its rigidity.
  • the reinforcing element 94 is designed as an annular wall 96 which, like a collar, protrudes perpendicularly from the rear side 98 of the support plate 72 facing away from the electric motor 24 and the axial piston pump 30 .
  • the annular wall 96 connects to the support plate 72 in one piece.
  • the supporting part 70 has a high mechanical load-bearing capacity, above all a high level of rigidity. This is achieved in particular by the support plate 72 in combination with the annular wall 96 and the housing part 88, the annular wall 96 and the housing part 88 as well as the bearing sleeve 92 being integrally connected to the support plate 72.
  • the annular wall 96 surrounds a gear chamber 102 in which the belt drive 26 is arranged.
  • the gear compartment is covered by a gear cover 104 which is detachably held on the ring wall 96 .
  • the gear cover 104 is in figure 3 hidden.
  • a soundproofing element 107 is arranged on the inside 105 of the gear cover 104 facing the gear compartment 102 .
  • the electric motor 24 has a motor housing 106, which has an air inlet opening 110 on its end face 108 facing away from the support plate 72 and the bearing plate 46, through which cooling air can be sucked into the motor housing 106 under the action of the fan wheel 52.
  • the cooling air can then flow through the motor housing 106, with the cooling air being deflected by 90° and exiting the motor housing 106 via an air outlet opening 112, with the air outlet opening 112 being arranged directly above the housing part 88, which is cooled by the cooling air.
  • the support part 70 has a plurality of connecting elements in the form of recesses 114 into which the support pins of the outer housing 12 can dip.
  • the high-pressure cleaning device 10 is characterized by a very compact design and relatively low manufacturing costs, while having a very high mechanical stability.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)

Description

Die Erfindung betrifft ein Hochdruckreinigungsgerät mit den Merkmalen des Oberbegriffes von Patentanspruch 1.The invention relates to a high-pressure cleaning device having the features of the preamble of patent claim 1.

Ein Hochdruckreinigungsgerät mit einer Axialkolbenpumpe, die mindestens einen linear bewegbaren Kolben aufweist, und mit einem Elektromotor, der eine Motorwelle aufweist und über ein Getriebe, eine Abtriebswelle und eine Taumelscheibe mit der Axialkolbenpumpe gekoppelt ist, ist aus der DE 10 2007 006 284 A1 bekannt. Mit Hilfe der Axialkolbenpumpe kann eine Reinigungsflüssigkeit, vorzugsweise Wasser, unter Druck gesetzt werden. Die Axialkolbenpumpe weist mehrere Kolben auf, die mit Hilfe einer Taumelscheibe linear hin und her bewegbar sind. Die Taumelscheibe ist über ein Planetengetriebe mit einem Elektromotor gekoppelt. Bei dem bekannten Hochdruckreinigungsgerät sind der Elektromotor, das Planetengetriebe, die Taumelscheibe und die Axialkolbenpumpe in einer Längsrichtung des Hochdruckreinigungsgeräts hintereinander angeordnet. Das bekannte Hochdruckreinigungsgerät weist eine nicht unbeträchtliche Länge auf.From DE 10 2007 006 284 A1 known. A cleaning fluid, preferably water, can be pressurized with the aid of the axial piston pump. The axial piston pump has a number of pistons that can be moved back and forth linearly with the aid of a swash plate. The swash plate is coupled to an electric motor via a planetary gear. In the known high-pressure cleaning device, the electric motor, the planetary gear, the swash plate and the axial piston pump are arranged one behind the other in a longitudinal direction of the high-pressure cleaning device. The well-known high-pressure cleaning device has a not inconsiderable length.

Aus den Veröffentlichungen US 5 230 471 A , DE 699 25 901 T2 und EP 0 636 425 A1 sind Hochdruckreinigungsgeräte bekannt, bei denen der Elektromotor über einen Kurbeltrieb mit einer mehrere Kolben aufweisenden Pumpe gekoppelt ist, wobei die Hubbewegung der Kolben senkrecht zur Motorwelle ausgerichtet ist. Eine derartige Ausgestaltung ist konstruktiv aufwändig und mit beträchtlichen Herstellungskosten verbunden.From the publications U.S. 5,230,471A , DE 699 25 901 T2 and EP 0 636 425 A1 high-pressure cleaning devices are known in which the electric motor is coupled via a crank drive to a pump having a plurality of pistons, with the stroke movement of the pistons being aligned perpendicularly to the motor shaft. Such an embodiment is structurally complex and associated with considerable manufacturing costs.

Ein Hochdruckreinigungsgerät mit den Merkmalen des Oberbegriffes von Patentanspruch 1 ist aus der Veröffentlichung US 2017/03503386 A1 bekannt.A high-pressure cleaning device with the features of the preamble of claim 1 is from the publication U.S. 2017/03503386 A1 known.

Aufgabe der vorliegenden Erfindung ist es, ein Hochdruckreinigungsgerät der eingangs genannten Art derart weiterzubilden, dass es eine kompakte Bauform und eine hohe mechanische Stabilität aufweist und kostengünstig herstellbar ist.The object of the present invention is to further develop a high-pressure cleaning device of the type mentioned at the outset in such a way that it has a compact design and high mechanical stability and can be produced inexpensively.

Diese Aufgabe wird durch ein Hochdruckreinigungsgerät mit den Merkmalen von Patentanspruch 1 gelöst.This object is achieved by a high-pressure cleaning device having the features of patent claim 1.

Beim erfindungsgemäßen Hochdruckreinigungsgerät ist die Axialkolbenpumpe radial versetzt zur Motorwelle angeordnet und die Linearbewegung des mindestens einen Kolbens verläuft parallel zur Motorwelle. Die Taumelscheibe ist mit einer Abtriebswelle verbunden, die parallel zur Motorwelle ausgerichtet ist, wobei die Motorwelle in Kombination mit dem Getriebe und der Abtriebswelle einen U-förmigen Antriebsstrang ausbilden. Ein erster Schenkel des U-förmigen Antriebsstrangs wird von der Motorwelle gebildet, und ein zweiter Schenkel des U-förmigen Antriebsstrangs wird von der Abtriebswelle gebildet, die über das Getriebe mit der Motorwelle gekoppelt ist. Die Motorwelle und die Abtriebswelle stehen somit in dieselbe Richtung vom Getriebe ab.In the high-pressure cleaning device according to the invention, the axial piston pump is arranged radially offset from the motor shaft and the linear movement of the at least one piston runs parallel to the motor shaft. The swash plate is connected to an output shaft which is aligned parallel to the motor shaft, the motor shaft in combination with the gearbox and the output shaft forming a U-shaped drive train. A first leg of the U-shaped drive train is formed by the motor shaft, and a second leg of the U-shaped drive train is formed by the output shaft, which is coupled to the motor shaft via the gearbox. The motor shaft and the output shaft therefore protrude from the gearbox in the same direction.

Bevorzugt ist die Motorwelle länger ausgestaltet als die Abtriebswelle.The motor shaft is preferably longer than the output shaft.

Eine derartige Ausgestaltung erlaubt es, die Länge des Hochdruckreinigungsgeräts zu reduzieren und dem Hochdruckreinigungsgerät eine kompakte Bauform zu verleihen. Die Kolben der Axialkolbenpumpe werden von der Taumelscheibe zu einer hin und her gehenden Linearbewegung angetrieben, wobei die Linearbewegung parallel zur Motorwelle ausgerichtet ist. Dadurch kann nicht nur die Länge sondern auch die Breite des Hochdruckreinigungsgeräts verhältnismäßig gering gehalten werden. Der Einsatz der Axialkolbenpumpe und der Taumelscheibe erlaubt es darüber hinaus, die Herstellungskosten des Hochdruckreinigungsgeräts verhältnismäßig gering zu halten, da diese Bauteile in großer Stückzahl kostengünstig produziert werden können.Such an embodiment makes it possible to reduce the length of the high-pressure cleaning device and to give the high-pressure cleaning device a compact design. The pistons of the axial piston pump are driven by the swashplate in reciprocating linear motion, the linear motion being parallel to the motor shaft. As a result, not only the length but also the width of the high-pressure cleaning device can be kept relatively small. The use of the axial piston pump and the swash plate also makes it possible to keep the production costs of the high-pressure cleaning device relatively low, since these components can be produced inexpensively in large numbers.

Gemäß der Erfindung weist der Elektromotor ein Lagerschild auf, an dem die Motorwelle drehbar gelagert ist, wobei das Lagerschild an einem Tragteil gehalten ist, an dem die Abtriebswelle drehbar gelagert ist. Der Antrieb der Taumelscheibe und über diese auch der Antrieb des mindestens einen Kolbens der Axialkolbenpumpe erfolgt über die Abtriebswelle, die über das Getriebe mit der Motorwelle gekoppelt ist. Die Abtriebswelle ist ebenso wie ein Lagerschild des Elektromotors an einem Tragteil gehalten, das dem Hochdruckreinigungsgerät eine hohe mechanische Stabilität verleiht.According to the invention, the electric motor has a bearing plate on which the motor shaft is rotatably mounted, the bearing plate being held on a support part on which the output shaft is rotatably mounted. The swash plate is driven and, via this, the at least one piston of the axial piston pump is also driven via the output shaft, which is coupled to the motor shaft via the transmission. Like an end shield of the electric motor, the output shaft is held on a support part that gives the high-pressure cleaning device high mechanical stability.

Bevorzugt ist der Elektromotor in einer horizontalen Gebrauchslage des Hochdruckreinigungsgeräts, in der die Motorwelle horizontal ausgerichtet ist, oberhalb der Taumelscheibe und der Axialkolbenpumpe angeordnet.The electric motor is preferably arranged above the swash plate and the axial piston pump when the high-pressure cleaning device is in a horizontal position of use, in which the motor shaft is aligned horizontally.

Günstigerweise besteht das Tragteil zumindest teilweise, vorzugsweise vollständig, aus Metall, beispielsweise aus einer Aluminiumlegierung.Favorably, the supporting part consists at least partially, preferably completely, of metal, for example of an aluminum alloy.

Bei einer vorteilhaften Ausgestaltung der Erfindung weist das Tragteil eine Tragplatte auf. Die Tragplatte ermöglicht eine besonders kompakte Ausgestaltung des Hochdruckreinigungsgeräts.In an advantageous embodiment of the invention, the support part has a support plate. The support plate enables a particularly compact configuration of the high-pressure cleaning device.

Von Vorteil ist es, wenn die Tragplatte in einer horizontalen Gebrauchslage des Hochdruckreinigungsgeräts vertikal ausgerichtet ist.It is advantageous if the support plate is aligned vertically when the high-pressure cleaning device is in a horizontal position of use.

Günstig ist es, wenn das Lagerschild des Elektromotors mit der Tragplatte lösbar verbunden ist.It is favorable if the bearing plate of the electric motor is detachably connected to the support plate.

Insbesondere kann vorgesehen sein, dass das Lagerschild an der Tragplatte verstellbar gehalten ist. Die Verstellbarkeit des Lagerschilds ermöglicht eine Justierung des Lagerschilds bei der Montage des Hochdruckreinigungsgeräts.In particular, it can be provided that the bearing plate is adjustably held on the support plate. The adjustability of the bearing plate enables the bearing plate to be adjusted when the high-pressure cleaning device is installed.

Günstig ist es, wenn das Lagerschild in vertikaler Richtung verstellbar an der Tragplatte gehalten ist.It is favorable if the end shield is held on the support plate so that it can be adjusted in the vertical direction.

Bevorzugt ist das Lagerschild mit der Tragplatte verschraubt. Hierbei ist es günstig, wenn die Tragplatte Langlöcher aufweist, die von Verbindungsschrauben durchgriffen werden. Durch Lösen der Verbindungsschrauben kann das Lagerschild und mit diesem der gesamte Elektromotor des Hochdruckreinigungsgeräts relativ zur Tragplatte verstellt werden.The end shield is preferably screwed to the support plate. It is favorable here if the support plate has oblong holes through which connecting screws pass. By loosening the connecting screws, the end shield and with it the entire electric motor of the high-pressure cleaning device can be adjusted relative to the support plate.

Von Vorteil ist es, wenn sich die Langlöcher in einer horizontalen Gebrauchslage des Hochdruckreinigungsgeräts in vertikaler Richtung erstrecken.It is advantageous if the elongated holes extend in a vertical direction when the high-pressure cleaning device is in a horizontal position of use.

Eine besonders kompakte und mechanisch stark belastbare Ausgestaltung wird bei einer vorteilhaften Ausführungsform des erfindungsgemäßen Hochdruckreinigungsgeräts dadurch erzielt, dass das Tragteil ein einstückig mit der Tragplatte verbundenes Gehäuseteil aufweist, das die Taumelscheibe in Umfangsrichtung umgibt. Die einstückige Verbindung der Tragplatte mit dem Gehäuseteil verleiht dem Tragteil eine besonders hohe mechanische Belastbarkeit.A particularly compact and mechanically strong configuration is achieved in an advantageous embodiment of the high-pressure cleaning device according to the invention in that the supporting part has a housing part which is integrally connected to the supporting plate and surrounds the swash plate in the circumferential direction. The one-piece connection of the support plate to the housing part gives the support part a particularly high mechanical load capacity.

Das Gehäuseteil kann beispielsweise in Form eines Zylindermantels ausgestaltet sein, wobei dessen Zylinderachse bevorzugt parallel zur Motorwelle ausgerichtet ist.The housing part can be designed, for example, in the form of a cylinder jacket, the cylinder axis of which is preferably aligned parallel to the motor shaft.

Das Gehäuseteil, das die Taumelscheibe in Umfangsrichtung umgibt, steht günstigerweise von der der Axialkolbenpumpe zugewandten Seite der Tragplatte ab.The housing part, which surrounds the swash plate in the circumferential direction, advantageously protrudes from the side of the support plate facing the axial piston pump.

Der Elektromotor weist bevorzugt ein Motorgehäuse auf mit mindestens einer Lufteintrittsöffnung, über die Kühlluft in das Motorgehäuse hineinströmen kann, und mindestens einer Luftaustrittsöffnung, über die die Kühlluft aus dem Motorgehäuse herausströmen kann, wobei die Kühlluft über die Luftaustrittsöffnung dem die Taumelscheibe umgebenden Gehäuseteil zuführbar ist. Die Kühlluft kann zunächst das Motorgehäuse durchströmen, um den Elektromotor zu kühlen, und kann anschließend das Gehäuseteil umströmen, das die Taumelscheibe umgibt, so dass auch dieses Gehäuseteil von der Kühlluft gekühlt werden kann.The electric motor preferably has a motor housing with at least one air inlet opening, through which the cooling air can flow into the motor housing, and at least one air outlet opening, through which the cooling air can flow out of the motor housing, the cooling air being able to be fed to the housing part surrounding the swash plate via the air outlet opening. The cooling air can first flow through the motor housing in order to cool the electric motor, and can then flow around the housing part that contains the swash plate surrounds, so that this part of the housing can be cooled by the cooling air.

Vorzugsweise ist die Kühlluft innerhalb des Motorgehäuses umlenkbar, insbesondere um 90°.The cooling air can preferably be deflected within the motor housing, in particular by 90°.

Von Vorteil ist es, wenn das Tragteil eine einstückig mit der Tragplatte verbundene Lagerhülse aufweist, an der die Abtriebswelle drehbar gelagert ist. Hierbei ist es günstig, wenn die Lagerhülse von dem Gehäuseteil umgeben ist, das auch die Taumelscheibe in Umfangsrichtung umgibt.It is advantageous if the support part has a bearing sleeve which is connected in one piece to the support plate and on which the output shaft is rotatably mounted. It is favorable here if the bearing sleeve is surrounded by the housing part, which also surrounds the swash plate in the circumferential direction.

Eine besonders hohe Steifigkeit des Tragteils wird bei einer vorteilhaften Ausgestaltung der Erfindung dadurch erzielt, dass das Tragteil ein einstückig mit der Tragplatte verbundenes Verstärkungselement aufweist.In an advantageous embodiment of the invention, a particularly high degree of rigidity of the supporting part is achieved in that the supporting part has a reinforcing element which is connected in one piece to the supporting plate.

Das Verstärkungselement kann beispielsweise in Form einer Verstärkungsrippe ausgestaltet sein.The reinforcement element can be designed, for example, in the form of a reinforcement rib.

Von besonderem Vorteil im Hinblick auf eine möglichst große Steifigkeit der Tragteil ist es, wenn das Verstärkungselement eine Ringwand aufweist, die von der dem Elektromotor und der Axialkolbenpumpe abgewandten Seite der Tragplatte absteht und einstückig mit der Tragplatte verbunden ist. Die Ringwand kann nach Art eines Kragens ausgestaltet sein, der von der Tragplatte absteht und dieser eine sehr hohe Steifigkeit verleiht.It is particularly advantageous with regard to the greatest possible rigidity of the supporting part if the reinforcing element has an annular wall which protrudes from the side of the supporting plate facing away from the electric motor and the axial piston pump and is integrally connected to the supporting plate. The annular wall can be designed in the manner of a collar, which protrudes from the support plate and gives it a very high level of rigidity.

Günstig ist es, wenn sich zumindest ein Teilbereich der Ringwand einstückig an einen Rand der Tragplatte anschließt.It is favorable if at least a partial area of the annular wall adjoins an edge of the support plate in one piece.

Bei einer vorteilhaften Ausführungsform der Erfindung steht die Ringwand senkrecht von der Tragplatte ab.In an advantageous embodiment of the invention, the ring wall projects perpendicularly from the support plate.

Vor Vorteil ist es, wenn die Ringwand einen Getrieberaum in Umfangsrichtung umgibt, in dem das Getriebe angeordnet ist.It is advantageous if the ring wall surrounds a gear chamber in the circumferential direction, in which the gear is arranged.

Bevorzugt weist das Hochdruckreinigungsgerät einen Getriebedeckel auf, der an der Ringwand gehalten ist.The high-pressure cleaning device preferably has a gear cover which is held on the annular wall.

Der Getriebedeckel definiert bei einer vorteilhaften Ausführungsform der Erfindung in Kombination mit der Ringwand und der Tragplatte den Getrieberaum, der das Getriebe aufnimmt.In an advantageous embodiment of the invention, the gear cover, in combination with the annular wall and the support plate, defines the gear space that accommodates the gear.

Bevorzugt ist an der dem Getrieberaum zugewandten Innenseite des Deckels ein Schalldämmelement angeordnet, beispielsweise eine Dämmmatte.A soundproofing element, for example an insulating mat, is preferably arranged on the inside of the cover facing the gear compartment.

Bei einer bevorzugten Ausgestaltung der Erfindung weist das Tragteil Verbindungselemente auf zur Verbindung des Tragteils mit einem Außengehäuse des Hochdruckreinigungsgeräts.In a preferred embodiment of the invention, the support part has connecting elements for connecting the support part to an outer housing of the high-pressure cleaning device.

Die Verbindungselemente können beispielsweise als Ausnehmungen ausgestaltet sein, in die am Außengehäuse des Hochdruckreinigungsgeräts angeordnete Tragzapfen eintauchen.The connecting elements can be configured, for example, as recesses into which support pins arranged on the outer housing of the high-pressure cleaning device dip.

Das Getriebe des erfindungsgemäßen Hochdruckreinigungsgeräts kann beispielsweise in Form eines Stirnradgetriebes ausgebildet sein.The transmission of the high-pressure cleaning device according to the invention can be designed, for example, in the form of a spur gear.

Von Vorteil ist es, wenn das Getriebe des Hochdruckreinigungsgeräts als Zugmittelgetriebe ausgebildet ist, beispielsweise in Form eines Kettentriebs.It is advantageous if the transmission of the high-pressure cleaning device is designed as a traction mechanism, for example in the form of a chain drive.

Bei einer vorteilhaften Ausführungsform der Erfindung ist das Getriebe als Riementrieb ausgestaltet. Eine erste Riemenscheibe kann drehfest mit der Motorwelle verbunden sein und eine zweite Riemenscheibe kann drehfest mit der Abtriebswelle verbunden sein, und ein Riemen, vorzugsweise ein Zahnriemen, kann die beiden Riemenscheiben umschlingen.In an advantageous embodiment of the invention, the transmission is designed as a belt drive. A first pulley can be non-rotatably connected to the motor shaft and a second pulley can be non-rotatably connected to the output shaft, and a belt, preferably a toothed belt, can loop around the two pulleys.

Die nachfolgende Beschreibung einer vorteilhaften Ausführungsform der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. Es zeigen:

Figur 1:
eine Seitenansicht eines Hochdruckreinigungsgeräts, wobei eine erste Gehäuseschale eines Außengehäuses des Hochdruckreinigungsgeräts ausgeblendet ist;
Figur 2:
eine schematische Seitenansicht einer Motorpumpeneinheit des Hochdruckreinigungsgeräts aus Figur 1;
Figur 3:
eine Ansicht der Motorpumpeneinheit in Richtung von Pfeil A aus Figur 2, wobei ein Getriebedeckel ausgeblendet ist;
Figur 4:
eine Schnittansicht der Motorpumpeneinheit längs der Linie 4-4 in Figur 3.
The following description of an advantageous embodiment of the invention is used in connection with the drawing for more detailed explanation. Show it:
Figure 1:
a side view of a high-pressure cleaning device, wherein a first housing shell of an outer housing of the high-pressure cleaning device is hidden;
Figure 2:
a schematic side view of a motor pump unit of the high-pressure cleaning device figure 1 ;
Figure 3:
a view of the motor pump unit in the direction of arrow A figure 2 , with a gear cover hidden;
Figure 4:
Fig. 4 is a sectional view of the motor pump assembly taken along line 4-4 in figure 3 .

In der Zeichnung ist eine vorteilhafte Ausführungsform des erfindungsgemäßen Hochdruckreinigungsgeräts schematisch dargestellt. Das Hochdruckreinigungsgerät ist insgesamt mit dem Bezugszeichen 10 belegt und weist ein Außengehäuse 12 auf mit einer ersten Gehäuseschale 14 und einer in der Zeichnung zur Erzielung einer besseren Übersicht nicht dargestellten zweiten Gehäuseschale, die in Figur 1 ausgeblendet ist. Das Außengehäuse 12 umgibt eine Motorpumpeneinheit 16 und weist zwei Stützfüße 18, 20 auf, mit denen das Hochdruckreinigungsgerät 10 in einer in der Zeichnung dargestellten horizontalen Gebrauchslage auf einer Standfläche 22 abgestellt werden kann.In the drawing, an advantageous embodiment of the high-pressure cleaning device according to the invention is shown schematically. The high-pressure cleaning device is denoted overall by the reference numeral 10 and has an outer housing 12 with a first housing shell 14 and a second housing shell, not shown in the drawing to provide a better overview, which is shown in figure 1 is hidden. The outer housing 12 surrounds a motor pump unit 16 and has two support feet 18, 20 with which the high-pressure cleaning device 10 can be parked on a standing surface 22 in a horizontal position of use shown in the drawing.

Die Motorpumpeneinheit 16 weist einen Elektromotor 24 auf, der über ein in der dargestellten Ausführungsform als Riementrieb 26 ausgestaltetes Getriebe und eine Taumelscheibe 28 eine Axialkolbenpumpe 30 antreibt. Die Axialkolbenpumpe 30 weist einen Flüssigkeitseinlass 32 und einen Flüssigkeitsauslass 34 auf. An den Flüssigkeitseinlass 32 kann eine Flüssigkeitszufuhrleitung, vorzugsweise ein Versorgungsschlauch, angeschlossen werden. Über die Flüssigkeitszufuhrleitung kann die Axialkolbenpumpe 30 mit unter Druck zu setzender Reinigungsflüssigkeit, vorzugsweise Wasser, versorgt werden. An den Flüssigkeitsauslass 34 kann eine Flüssigkeitsauslassleitung, vorzugsweise ein Druckschlauch, angeschlossen werden. Über die Flüssigkeitsauslassleitung kann die von der Axialkolbenpumpe 30 unter Druck gesetzte Reinigungsflüssigkeit abgegeben werden kann. Dies erlaubt es, die unter Druck gesetzte Reinigungsflüssigkeit auf einen zu reinigenden Gegenstand zu richten.The motor-pump unit 16 has an electric motor 24 which drives an axial piston pump 30 via a transmission designed as a belt drive 26 in the illustrated embodiment and a swash plate 28 . The axial piston pump 30 has a liquid inlet 32 and a liquid outlet 34 . A liquid supply line, preferably a supply hose, can be connected to the liquid inlet 32 . Via the liquid supply line the axial piston pump 30 can be supplied with cleaning liquid to be pressurized, preferably water. A liquid outlet line, preferably a pressure hose, can be connected to the liquid outlet 34 . The cleaning liquid that is pressurized by the axial piston pump 30 can be discharged via the liquid outlet line. This allows the pressurized cleaning liquid to be directed at an object to be cleaned.

Im dargestellten Ausführungsbeispiel weist die Axialkolbenpumpe 30 insgesamt drei identisch ausgestaltete Kolben auf, wobei in Figur 4 zur Erzielung einer besseren Übersicht lediglich ein erster Kolben 36 und ein zweiter Kolben 38 dargestellt sind. Derartige Axialkolbenpumpen sind dem Fachmann an sich bekannt und bedürfen daher vorliegend keiner detaillierten Beschreibung. Die Kolben 36, 38 werden von der Taumelscheibe 28 jeweils zu einer hin und her gehenden Linearbewegung angetrieben, unter deren Wirkung Flüssigkeit vom Flüssigkeitseinlass 32 angesaugt, unter Druck gesetzt und anschließend über den Flüssigkeitsauslass 34 abgegeben werden kann. In an sich bekannter Weise umfasst die Axialkolbenpumpe 30 hierzu an sich bekannte Pumpkammern, in die jeweils ein Kolben 36, 38 eintaucht, sowie geeignete Einlass- und Auslassventile, über die die Flüssigkeit den Pumpkammern zugeführt und von den Pumpkammern abgegeben wird.In the exemplary embodiment shown, the axial piston pump 30 has a total of three identically configured pistons, with figure 4 to achieve a better overview, only a first piston 36 and a second piston 38 are shown. Such axial piston pumps are known per se to a person skilled in the art and therefore do not require a detailed description here. The pistons 36, 38 are each driven by the swash plate 28 in a reciprocating linear movement, under the action of which liquid can be drawn in from the liquid inlet 32, pressurized and then discharged via the liquid outlet 34. In a manner known per se, the axial piston pump 30 comprises pump chambers known per se, into which a piston 36, 38 dips, as well as suitable inlet and outlet valves, via which the liquid is supplied to the pump chambers and discharged from the pump chambers.

Die Linearbewegung der Kolben 36, 38 ist in Figur 4 durch den Doppelpfeil 40 veranschaulicht und verläuft parallel zur Längsachse 42 einer Motorwelle 44 des Elektromotors 24, der über der Axialkolbenpumpe 30 und der Taumelscheibe 28 angeordnet ist. Bezogen auf die Längsachse 42 ist die Axialkolbenpumpe 30 radial versetzt zur Motorwelle 44 angeordnet.The linear movement of the pistons 36, 38 is in figure 4 illustrated by the double arrow 40 and runs parallel to the longitudinal axis 42 of a motor shaft 44 of the electric motor 24, which is arranged above the axial piston pump 30 and the swash plate 28. Relative to the longitudinal axis 42 , the axial piston pump 30 is arranged radially offset from the motor shaft 44 .

Die Motorwelle 44 ist an einem Lagerschild 46 und einem weiteren Lagerteil 48 drehbar gelagert. Ein erster Endabschnitt 50 der Motorwelle 44 ragt auf der dem Lagerschild 46 abgewandten Seite des weiteren Lagerteils 48 aus dem weiteren Lagerteil 48 heraus und ist drehfest mit einem Lüfterrad 52 verbunden. Ein zweiter Endabschnitt 54 der Motorwelle 44 ragt auf der dem weiteren Lagerteil 48 abgewandten Seite des Lagerschilds 46 aus dem Lagerschild 46 heraus und ist drehfest mit einer ersten Riemenscheibe 56 des Riementriebs 26 verbunden. Eine zweite Riemenscheibe 58 des Riementriebs 26 ist drehfest mit einer Abtriebswelle 60 verbunden, deren Längsachse 62 parallel zur Längsachse 42 der Motorwelle 44 ausgerichtet ist. Die Abtriebswelle 60 ist drehfest mit der Taumelscheibe 28 verbunden. Ein Riemen 64 umschlingt die erste Riemenscheibe 56 und die zweite Riemenscheibe 58, so dass die Bewegung der Motorwelle 44 über die erste Riemenscheibe 56, den Riemen 64 und die zweite Riemenscheibe 58 auf die Abtriebswelle 60 und von dieser auf die Taumelscheibe 28 übertragen wird, an deren der Abtriebswelle 60 abgewandten Stirnseite 66 die Kolben 36, 38 der Axialkolbenpumpe 30 federnd anliegen, so dass sie von der Taumelscheibe 28 zu der bereits erwähnten hin und her gehenden Linearbewegung angetrieben werden.The motor shaft 44 is rotatably mounted on a bearing plate 46 and a further bearing part 48 . A first end section 50 of the motor shaft 44 protrudes from the further bearing part 48 on the side of the further bearing part 48 facing away from the bearing plate 46 and is connected to a fan wheel 52 in a rotationally fixed manner. A second end portion 54 of the motor shaft 44 protrudes on the further Bearing part 48 facing away from the bearing plate 46 out of the bearing plate 46 and is rotatably connected to a first pulley 56 of the belt drive 26. A second pulley 58 of the belt drive 26 is connected in a torque-proof manner to an output shaft 60 whose longitudinal axis 62 is aligned parallel to the longitudinal axis 42 of the motor shaft 44 . The output shaft 60 is non-rotatably connected to the swash plate 28 . A belt 64 wraps around the first pulley 56 and the second pulley 58 so that the movement of the motor shaft 44 is transmitted via the first pulley 56, the belt 64 and the second pulley 58 to the output shaft 60 and from there to the swashplate 28 whose end face 66 facing away from the output shaft 60 bears the pistons 36, 38 of the axial piston pump 30 resiliently, so that they are driven by the swash plate 28 to perform the already mentioned reciprocating linear movement.

Wie insbesondere aus Figur 4 deutlich wird, bildet die Motorwelle 44 in Kombination mit dem Riementrieb 26 und der Abtriebswelle 60 einen U-förmigen Antriebsstrang aus, über den der Elektromotor 24 mit der Taumelscheibe 28 verbunden ist, die die Kolben 36 und 38 zu einer hin und her gehenden Linearbewegung antreibt. Die Motorwelle 44 ist länger ausgestaltet als die Abtriebswelle 60 und bildet einen ersten Schenkel des U-förmigen Antriebsstrangs aus. Die Abtriebswelle 60 bildet eine zweiten Schenkel des U-förmigen Antriebsstrangs aus und ist über den Riementrieb mit der Motorwelle 44 gekoppelt.Like in particular figure 4 As becomes clear, the motor shaft 44 in combination with the belt drive 26 and the output shaft 60 forms a U-shaped drive train, via which the electric motor 24 is connected to the swash plate 28, which drives the pistons 36 and 38 in a reciprocating linear movement . The motor shaft 44 is designed to be longer than the output shaft 60 and forms a first leg of the U-shaped drive train. The output shaft 60 forms a second leg of the U-shaped drive train and is coupled to the motor shaft 44 via the belt drive.

Die Festlegung des Elektromotors 24 derart, dass die Axialkolbenpumpe 30 bezogen auf die Längsachse 42 in radialer Richtung versetzt zur Motorwelle 22 angeordnet ist und die Linearbewegung der Kolben 36, 38 parallel zur Längsachse der Motorwelle 44 ausgerichtet ist, erfolgt mit Hilfe eines starr ausgestalteten Tragteils 70, das im dargestellten Ausführungsbeispiel aus einer Aluminiumlegierung besteht. Mit Hilfe des Tragteils 70 ist der Elektromotor 24 im dargestellten Ausführungsbeispiel oberhalb der Axialkolbenpumpe 30 und der Taumelscheibe 28 angeordnet, wenn das Hochdruckreinigungsgerät eine horizontale Gebrauchslage einnimmt.The fixing of the electric motor 24 in such a way that the axial piston pump 30 is arranged offset in the radial direction relative to the motor shaft 22 with respect to the longitudinal axis 42 and the linear movement of the pistons 36, 38 is aligned parallel to the longitudinal axis of the motor shaft 44 is carried out with the aid of a rigidly designed support part 70 , which consists of an aluminum alloy in the illustrated embodiment. With the help of the support part 70, the electric motor 24 is arranged above the axial piston pump 30 and the swash plate 28 in the exemplary embodiment shown when the high-pressure cleaning device assumes a horizontal position of use.

Das Tragteil 70 weist eine Tragplatte 72 auf, die in der in der Zeichnung dargestellten horizontalen Gebrauchslage des Hochdruckreinigungsgeräts 10 vertikal ausgerichtet ist. Dies wird insbesondere aus den Figuren 3 und 4 deutlich. Das Lagerschild 46 des Elektromotors 24 ist an der Tragplatte 72 in vertikaler Richtung verstellbar gehalten. Die Tragplatte 72 bildet hierzu einen Tragflansch 74 aus, der eine zentrale Öffnung 76 aufweist sowie zu beiden Seiten der zentralen Öffnung 76 angeordnete Langlöcher 78, 80, 82, 84, die jeweils von einer Verbindungsschraube 86 durchgriffen werden, mit deren Hilfe das Lagerschild 46 mit der Tragplatte 72 verschraubt ist.The support part 70 has a support plate 72 which is aligned vertically in the horizontal position of use of the high-pressure cleaning device 10 shown in the drawing. This is in particular from the Figures 3 and 4 clearly. The bearing plate 46 of the electric motor 24 is held on the support plate 72 so that it can be adjusted in the vertical direction. For this purpose, the support plate 72 forms a support flange 74, which has a central opening 76 and elongated holes 78, 80, 82, 84 arranged on both sides of the central opening 76, through which a connecting screw 86 passes in each case, with the aid of which the end shield 46 the support plate 72 is screwed.

Der zweite Endabschnitt 54 der Motorwelle 44 durchgreift die zentrale Öffnung 76 des Tragflanschs 74 und trägt die voranstehend bereits erwähnte erste Riemenscheibe 56.The second end section 54 of the motor shaft 44 passes through the central opening 76 of the support flange 74 and carries the first pulley 56 already mentioned above.

Zusätzlich zur Tragplatte 72 weist das Tragteil 70 ein Gehäuseteil 88 auf, das einen zylindrischen Gehäusemantel 90 ausbildet, der die Taumelscheibe 28 in Umfangsrichtung umgibt und einstückig mit der Tragplatte 72 verbunden ist.In addition to the support plate 72, the support part 70 has a housing part 88 which forms a cylindrical housing shell 90 which surrounds the swash plate 28 in the circumferential direction and is connected to the support plate 72 in one piece.

Das Tragteil 70 weist darüber hinaus eine Lagerhülse 92 auf, an der die Abtriebswelle 60 drehbar gelagert ist und die ebenso wie die Taumelscheibe 28 vom Gehäusemantel 90 umgeben ist. Auch die Lagerhülse 92 ist einstückig mit der Tragplatte 72 verbunden.The supporting part 70 also has a bearing sleeve 92 on which the output shaft 60 is rotatably mounted and which, like the swash plate 28 , is surrounded by the housing casing 90 . The bearing sleeve 92 is also connected to the support plate 72 in one piece.

Das Tragteil 70 weist außerdem ein Verstärkungselement 94 auf, das einstückig mit der Tragplatte 72 verbunden ist und dessen Steifigkeit zusätzlich verstärkt. Das Verstärkungselement 94 ist in der dargestellten Ausführungsform als Ringwand 96 ausgestaltet, die nach Art eines Kragens von der dem Elektromotor 24 und der Axialkolbenpumpe 30 abgewandten Rückseite 98 der Tragplatte 72 senkrecht absteht. Die Ringwand 96 schließt sich einstückig an die Tragplatte 72 an.The support part 70 also has a reinforcement element 94 which is connected in one piece to the support plate 72 and additionally increases its rigidity. In the illustrated embodiment, the reinforcing element 94 is designed as an annular wall 96 which, like a collar, protrudes perpendicularly from the rear side 98 of the support plate 72 facing away from the electric motor 24 and the axial piston pump 30 . The annular wall 96 connects to the support plate 72 in one piece.

Das Tragteil 70 weist eine hohe mechanische Belastbarkeit auf, vor allem eine hohe Steifigkeit. Dies wird insbesondere durch die Tragplatte 72 in Kombination mit der Ringwand 96 und dem Gehäuseteil 88 erzielt, wobei die Ringwand 96 und das Gehäuseteil 88 ebenso wie auch die Lagerhülse 92 einstückig mit der Tragplatte 72 verbunden sind.The supporting part 70 has a high mechanical load-bearing capacity, above all a high level of rigidity. This is achieved in particular by the support plate 72 in combination with the annular wall 96 and the housing part 88, the annular wall 96 and the housing part 88 as well as the bearing sleeve 92 being integrally connected to the support plate 72.

Die Ringwand 96 umgibt einen Getrieberaum 102, in dem der Riementrieb 26 angeordnet ist. Rückseitig wird der Getrieberaum von einem Getriebedeckel 104 abgedeckt, der an der Ringwand 96 lösbar gehalten ist. Zur Erzielung einer besseren Übersicht ist der Getriebedeckel 104 in Figur 3 ausgeblendet. An der dem Getrieberaum 102 zugewandten Innenseite 105 des Getriebedeckels 104 ist ein Schalldämmelement 107 angeordnet.The annular wall 96 surrounds a gear chamber 102 in which the belt drive 26 is arranged. At the rear, the gear compartment is covered by a gear cover 104 which is detachably held on the ring wall 96 . To achieve a better overview, the gear cover 104 is in figure 3 hidden. A soundproofing element 107 is arranged on the inside 105 of the gear cover 104 facing the gear compartment 102 .

Der Elektromotor 24 weist ein Motorgehäuse 106 auf, das an seiner der Tragplatte 72 und dem Lagerschild 46 abgewandten Stirnseite 108 eine Lufteintrittsöffnung 110 aufweist, über die unter der Wirkung des Lüfterrads 52 Kühlluft in das Motorgehäuse 106 eingesaugt werden kann. Die Kühlluft kann anschließend das Motorgehäuse 106 durchströmen, wobei die Kühlluft um 90° umgelenkt wird und das Motorgehäuse 106 über eine Luftaustrittsöffnung 112 verlässt, wobei die Luftaustrittsöffnung 112 unmittelbar oberhalb des Gehäuseteils 88 angeordnet ist, das von der Kühlluft gekühlt wird.The electric motor 24 has a motor housing 106, which has an air inlet opening 110 on its end face 108 facing away from the support plate 72 and the bearing plate 46, through which cooling air can be sucked into the motor housing 106 under the action of the fan wheel 52. The cooling air can then flow through the motor housing 106, with the cooling air being deflected by 90° and exiting the motor housing 106 via an air outlet opening 112, with the air outlet opening 112 being arranged directly above the housing part 88, which is cooled by the cooling air.

Zur Festlegung des Tragteils 70 am Außengehäuse 12 weist das Tragteil 70 mehrere Verbindungselemente in Form von Ausnehmungen 114 auf, in die Tragzapfen des Außengehäuses 12 eintauchen können.To fix the support part 70 to the outer housing 12, the support part 70 has a plurality of connecting elements in the form of recesses 114 into which the support pins of the outer housing 12 can dip.

Das Hochdruckreinigungsgerät 10 zeichnet sich durch eine sehr kompakte Bauform aus sowie durch verhältnismäßig geringe Herstellungskosten, wobei es eine sehr hohe mechanische Stabilität aufweist.The high-pressure cleaning device 10 is characterized by a very compact design and relatively low manufacturing costs, while having a very high mechanical stability.

Claims (13)

  1. High pressure cleaning appliance with an axial piston pump (30), which comprises at least one linearly moveable piston (36, 38), and with an electric motor (24), which comprises a motor shaft (44) and is coupled to the axial piston pump (30) by way of a transmission, a drive shaft (60) and a swash plate (28), wherein the axial piston pump (30) is arranged offset from the motor shaft (44) in the radial direction in relation to a longitudinal axis (42) of the motor shaft (44), wherein the linear movement of the at least one piston (36, 38) is oriented in parallel to the longitudinal axis (42) of the motor shaft (44) and the motor shaft (44) in combination with the transmission and the drive shaft (60) forms a U-shaped drive train, characterized in that the electric motor (24) comprises a bearing shield (46) on which the motor shaft (44) is rotatably mounted, wherein the bearing shield (46) is held on a support part (70) on which the drive shaft (60) is rotatably mounted.
  2. High pressure cleaning appliance in accordance with Claim 1, characterized in that the electric motor (24), in a horizontal use position of the high pressure cleaning appliance in which the motor shaft (44) is oriented horizontally, is arranged above the swash plate (28) and the axial piston pump (30).
  3. High pressure cleaning appliance in accordance with Claim 1 or 2, characterized in that the support part (70) consists at least partially of metal.
  4. High pressure cleaning appliance in accordance with Claim 1, 2 or 3, characterized in that the support part (70) comprises a support plate (72).
  5. High-pressure cleaning appliance in accordance with Claim 4, characterized in that the support plate (70), in a horizontal use position of the high pressure cleaning appliance (10), is oriented vertically.
  6. High pressure cleaning appliance in accordance with Claim 4 or 5, characterized in that the bearing shield (46) is releasably connected to the support plate (72) and/or in that the bearing shield (46) is displaceably held on the support plate (72).
  7. High pressure cleaning appliance in accordance with any one of Claims 4 to 6, characterized in that the support part (70) comprises a housing part (88) which is connected to the support plate (72) in one piece and surrounds the swash plate (28) in the circumferential direction, in particular in that the housing part (88) projects from the side of the support plate (72) facing toward the axial piston pump (30).
  8. High pressure cleaning appliance in accordance with Claim 7, characterized in that the electric motor (24) comprises a motor housing (106) with at least one air inlet opening (110) by way of which cooling air can flow into the motor housing (106), and with at least one air outlet opening (112) by way of which the cooling air can flow out of the motor housing (106), wherein the cooling air is suppliable to the housing part (88) surrounding the swash plate (28) by way of the air outlet opening (112), preferably in that the cooling air is deflectable within the motor housing (106).
  9. High pressure cleaning appliance in accordance with any one of Claims 4 to 8, characterized in that the support part (70) comprises a bearing sleeve (92) which is connected to the support plate (72) in one piece and on which the drive shaft (60) is rotatably mounted.
  10. High pressure cleaning appliance in accordance with any one of Claims 4 to 9, characterized in that the support part (70) comprises a reinforcing element (94) which is connected to the support plate in one piece.
  11. High pressure cleaning appliance in accordance with Claim 10, characterized in that the reinforcing element (94) comprises an annular wall (96) which projects from the side (98) of the support plate (72) facing away from the electric motor (24) and the axial piston pump (30) and is connected to the support plate (72) in one piece, in particular in that the annular wall (96) projects perpendicularly from the support plate (72) and/or in that the annular wall (96) surrounds a transmission space (102) in the circumferential direction, in which transmission space the transmission is arranged, and/or in that the high pressure cleaning appliance (10) comprises a transmission cover (104) which is held on the annular wall (96), preferably in that at least one sound insulation element (107) is arranged on an inside (105) of the transmission cover (104) facing toward the transmission space (102).
  12. High pressure cleaning appliance in accordance with any one of the preceding Claims, characterized in that the support part (70) comprises at least one connecting element (114) for connecting the support part (70) to an outer housing (12) of the high pressure cleaning appliance (10).
  13. High pressure cleaning appliance in accordance with any one of the preceding Claims, characterized in that the transmission is configured as a traction means transmission, preferably in that the transmission is configured as a belt drive (26).
EP18826049.1A 2018-12-20 2018-12-20 High pressure cleaning device Active EP3898016B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/086392 WO2020126014A1 (en) 2018-12-20 2018-12-20 High pressure cleaning device

Publications (3)

Publication Number Publication Date
EP3898016A1 EP3898016A1 (en) 2021-10-27
EP3898016B1 true EP3898016B1 (en) 2023-08-16
EP3898016C0 EP3898016C0 (en) 2023-08-16

Family

ID=64870512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18826049.1A Active EP3898016B1 (en) 2018-12-20 2018-12-20 High pressure cleaning device

Country Status (4)

Country Link
EP (1) EP3898016B1 (en)
JP (1) JP7348286B2 (en)
CN (1) CN112867572A (en)
WO (1) WO2020126014A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106955A1 (en) * 1991-03-05 1992-09-10 Kaercher Gmbh & Co Alfred HIGH PRESSURE CLEANER
US5230471A (en) * 1991-03-08 1993-07-27 Shop-Vac Corporation Pressure washer
US5529460A (en) 1993-07-28 1996-06-25 Coleman Powermate, Inc. Pressure washer with flow control switch
CA2191967C (en) * 1994-06-17 2000-03-21 Josef Schneider High-pressure cleaning appliance with safety insulation
DE19607881C2 (en) * 1996-03-01 2003-07-17 Kaercher Gmbh & Co Kg Alfred Pump for a high pressure cleaning device
SE512070C2 (en) * 1998-03-18 2000-01-24 Tetra Laval Holdings & Finance Apparatus for high-pressure pumping or homogenization of liquids
DE10300070A1 (en) * 2002-11-15 2004-06-03 Brueninghaus Hydromatik Gmbh Axial piston machine, retraction plate and method for producing a retraction plate
US7153105B2 (en) * 2003-04-24 2006-12-26 Haldex Brake Corporation Compressor with swash plate housing inlet port
DE102007006284A1 (en) * 2007-02-01 2008-08-07 Alfred Kärcher Gmbh & Co. Kg Motor pump unit for high pressure cleaning device, has internal gear designed as independent component, which is held by interlinking form closure elements of housing and internal gear in housing in twistable secure manner
KR20130102069A (en) * 2010-09-15 2013-09-16 콘티넨탈 테베스 아게 운트 코. 오하게 Brake actuation unit for a motor vehicle brake system and motor-pump unit for providing a vacuum for a brake actuation unit of a motor vehicle brake system
CN102249070A (en) * 2011-05-02 2011-11-23 苏州工业园区高登威科技有限公司 Roll shaft transmission device with adjustable tension
CA2968937C (en) * 2016-06-03 2019-09-17 Fna Group, Inc. Pump assembly with electric starter
CN107294332A (en) * 2017-08-14 2017-10-24 江苏环球特种电机有限公司 A kind of blower-pump load saves pole-changing multi-speed 3-phase asynchronous motor

Also Published As

Publication number Publication date
CN112867572A (en) 2021-05-28
EP3898016A1 (en) 2021-10-27
JP2022522324A (en) 2022-04-18
JP7348286B2 (en) 2023-09-20
EP3898016C0 (en) 2023-08-16
WO2020126014A1 (en) 2020-06-25

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