EP1045989B1 - High pressure cleaning device - Google Patents

High pressure cleaning device Download PDF

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Publication number
EP1045989B1
EP1045989B1 EP98966373A EP98966373A EP1045989B1 EP 1045989 B1 EP1045989 B1 EP 1045989B1 EP 98966373 A EP98966373 A EP 98966373A EP 98966373 A EP98966373 A EP 98966373A EP 1045989 B1 EP1045989 B1 EP 1045989B1
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EP
European Patent Office
Prior art keywords
bearing
swash plate
motor shaft
appliance according
motor
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
EP98966373A
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German (de)
French (fr)
Other versions
EP1045989A1 (en
Inventor
Bernd Keiner
Erich Moritsch
Jürgen KLÖPFER
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
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Alfred Kaercher SE and Co KG
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Application filed by Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP1045989A1 publication Critical patent/EP1045989A1/en
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Publication of EP1045989B1 publication Critical patent/EP1045989B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • 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
    • F04B1/148—Bearings therefor

Definitions

  • the invention relates to a high-pressure cleaning device an engine and a piston pump driven by it, the piston springs of which are driven by the engine Swash plate, with a motor shaft, which can be rotated on both sides and is non-rotatable at one end is connected to the swash plate, and with a Rolling bearing with two concentric bearing rings on the swash plate side End, whose outer bearing ring in a bearing plate of the engine is held during the inner bearing ring surrounds the motor shaft.
  • a non-rotatable connection of the rolling bearing with the motor shaft can be achieved in that the motor shaft has a shoulder so that the rolling bearing axially between this shoulder and the swashplate below Forming a frictional connection can be clamped can. This requires training on the shoulder the motor shaft increased manufacturing costs.
  • the swash plate side To design the bearing of the motor shaft that the assembly of the motor shaft and the bearing simplified and as independent as possible from the inevitable Manufacturing tolerances.
  • the recording to the swash plate open is. This facilitates assembly, since the rolling bearing inserted into the receptacle from the piston side can be.
  • the housing of the engine and the Pumps are typically firmly connected.
  • the pistons of the pump are surrounded by springs that are Support on the pump housing and the pistons against the Press swashplate.
  • the piston axis and the longitudinal axis the motor shaft are usually parallel. This causes the piston spring to push the swash plate the attached motor shaft in the direction of the motor housing.
  • the insertion depth of the motor shaft is limited by a stop.
  • the motor shaft is supported on the motor housing.
  • the drag to the force exerted by the piston springs is applied to the motor shaft from the stop, whereby the motor shaft is fixed in the axial direction can be.
  • the stop through the bearing of the motor shaft is formed, which in turn is on the end shield supports the engine. In this way it works Force of the piston springs via the roller bearing on the end shield of the motor. The roller bearing is thus through the force of the piston springs pressed against the motor housing.
  • the swash plate abuts the swash plate-side bearing. This creates a connection between the swash plate side Bearings and the motor shaft, because the swashplate is rotatably attached to the motor shaft connected is.
  • the inner bearing ring surrounds the motor shaft only loose.
  • the swash plate face on the inner bearing ring of the swash plate Bearing is present. Because the swashplate is not touching the two bearing rings at the same time ensures that the bearing rings are relative to each other can twist.
  • the recording is one-sided open bowl with an inwardly jumping step and that the inner bearing ring is not on the Level applies.
  • the spring forces act the piston springs on the swash plate, this in turn is non-rotatably connected to the motor shaft.
  • the Swashplate is supported on the inner bearing ring of the Rolling bearing.
  • the outer bearing ring is loose in the shell open on one side with inward jumping Step. This leads to a frictional connection, which is the effective one Force the piston springs over the swash plate, the inner bearing shell, the balls and the outer bearing shell transfers to the level of the end shield.
  • the rolling bearing is designed as a ball bearing.
  • the drawing shows a longitudinal section through a Electric motor with a piston pump coupled to it a high-pressure cleaning device.
  • the electric motor 1 of a high-pressure cleaning device shown in FIG. 1 comprises a housing 2 in which a motor shaft 3 running in the horizontal direction is arranged. On her protruding from the electric motor 1 free end, the motor shaft 3 carries a swash plate 4, in which a pressure plate via a ball bearing 5 6 is rotatably mounted. Support this piston 7 one not shown in the drawing Piston pump from the surrounding by the piston 7 Coil springs 8 pressed against the pressure pad 6 become.
  • the electric motor 1 is in a housing 2, on which the swash plate 4, surrounding the piston 7 and the pump, not shown Pump housing 9 connects.
  • a transverse wall 10 forms a bearing plate in which the outer cage 11 of a ball bearing is supported, through which the motor shaft 3 is mounted in the transverse wall 10 is.
  • the transverse wall 10 is used to form the end shield exempted in two stages, the second stage 13 is just so wide that only the outer cage 11 of the ball bearing 12 is supported on the step 13.
  • the inner cage 14 of the ball bearing 12 surrounds the motor shaft 3 loose.
  • the swash plate 4 extends over the end face of the motor shaft 3 in the radial direction just so far that it the inner cage 14 of the Ball bearing 12 covered, but the outer cage 11 not touched.
  • the swash plate 4 is for example via a tie rod, which is not shown, rotatably connected to the motor shaft 3.
  • the coil springs 8 are supported on the pump housing and press the pistons 7 against the swash plate 4. This in turn stands with the inner cage 14 of the ball bearing 12 in contact by frictional connection over the Balls 15 on the outer cage and thus on the step 13 of the transverse wall 10 of the housing 2 acts.
  • the conventional one Pressure washers preferred non-rotatable Connection of inner cage 14 and motor shaft 13, for example by shrinking the inner cage 14 on the motor shaft 3, is in the present Embodiment unnecessary.
  • the contact pressure of the Coil springs 8 is so large that between the Swash plate 4 and the inner cage 14 and the outer cage 11 and the step 13 forms a frictional connection, the quasi a rotatable connection between Motor shaft 3 and inner cage 14 over the swash plate 4 and another non-rotatable connection between the outer cage 11 and the transverse wall 10 or the step 13 realized.
  • This embodiment primarily simplifies assembly of the high-pressure cleaning device and allows larger ones Manufacturing tolerances in the diameters of the bearing rings and the motor shaft.
  • the ball bearing 12 becomes simple inserted into the two-stage recess of the transverse wall 10 and the motor shaft non-rotatably connected to the swash plate 4 3 inserted into the electric motor 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Rolling Contact Bearings (AREA)
  • Motor Or Generator Frames (AREA)

Description

Die Erfindung betrifft ein Hochdruckreinigungsgerät mit einem Motor und einer von diesem angetriebenen Kolbenpumpe, deren Kolbenfedern an einer von dem Motor angetriebenen Taumelscheibe anliegen, mit einer Motorwelle, die beidseitig drehbar gelagert und an einem Ende drehfest mit der Taumelscheibe verbunden ist, und mit einem Wälzlager mit zwei konzentrischen Lagerringen am taumelscheibenseitigen Ende, dessen äußerer Lagerring in einem Lagerschild des Motors gehalten ist, während der innere Lagerring die Motorwelle umgibt.The invention relates to a high-pressure cleaning device an engine and a piston pump driven by it, the piston springs of which are driven by the engine Swash plate, with a motor shaft, which can be rotated on both sides and is non-rotatable at one end is connected to the swash plate, and with a Rolling bearing with two concentric bearing rings on the swash plate side End, whose outer bearing ring in a bearing plate of the engine is held during the inner bearing ring surrounds the motor shaft.

Bei bekannten Hochdruckreinigungsgeräten dieser Bauart wird die Motorwelle taumelscheibenseitig in einem Wälzlager geführt, das sowohl drehfest mit der Motorwelle als auch mit dem Lagerschild des Motors verbunden ist (WO 96/17694). Diese drehfesten Verbindungen können dadurch erreicht werden; daß der innere Lagerring des Wälzlagers auf die Motorwelle aufgeschrumpft und der äußere Lagerring in das Lagerschild des Motors eingespannt wird. Deshalb wirken sich bereits geringste, durch Fertigungstoleranzen bedingte Abweichungen bei den Durchmessern der Motorwelle sowie der Lagerringe des Wälzlagers bei der Montage nachteilig aus. Alternativ kann eine drehfeste Verbindung des Wälzlagers mit der Motorwelle dadurch erreicht werden, daß die Motorwelle eine Schulter aufweist, so daß das Wälzlager axial zwischen diese Schulter und der Taumelscheibe unter Bildung eines Reibschlusses eingespannt werden kann. Dabei erfordert die Ausbildung der Schulter an der Motorwelle einen erhöhten Fertigungsaufwand.In known high-pressure cleaning devices of this type the motor shaft is on the swash plate side in a roller bearing guided, both rotatably with the motor shaft as well as connected to the end shield of the motor (WO 96/17694). This makes these non-rotatable connections be achieved; that the inner bearing ring of the Rolling bearing shrunk onto the motor shaft and the outer bearing ring clamped in the end shield of the motor becomes. Therefore, even the slightest deviations due to manufacturing tolerances the diameters of the motor shaft and the bearing rings of the rolling bearing disadvantageously during assembly. alternative can a non-rotatable connection of the rolling bearing with the motor shaft can be achieved in that the motor shaft has a shoulder so that the rolling bearing axially between this shoulder and the swashplate below Forming a frictional connection can be clamped can. This requires training on the shoulder the motor shaft increased manufacturing costs.

Es ist dementsprechend Aufgabe der Erfindung, die taumelscheibenseitige Lagerung der Motorwelle so zu gestalten, daß die Montage der Motorwelle und des Lagers vereinfacht und möglichst unabhängig von unvermeidlichen Fertigungstoleranzen wird.It is accordingly an object of the invention, the swash plate side To design the bearing of the motor shaft that the assembly of the motor shaft and the bearing simplified and as independent as possible from the inevitable Manufacturing tolerances.

Diese Aufgabe wird bei einem Hochdruckreinigungsgerät der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß der innere Lagerring die Motorwelle lose umgibt. Dadurch erübrigt es sich, den inneren Lagerring des taumelscheibenseitigen Lagers auf die Motorwelle aufzuschrumpfen.This task is done with a high pressure washer of the type described in the introduction solved that the inner bearing ring loose the motor shaft surrounds. This eliminates the need for the inner bearing ring of the swash plate bearing on the motor shaft shrink.

Besonders vorteilhaft ist es, wenn der äußere Lagerring lose in einer Aufnahme des Lagerschildes ruht, die den äußeren Lagerring in radialer und in axialer Richtung festlegt. Die Aufnahme des Lagerschildes bildet somit einen Anschlag für das Wälzlager in axialer und radialer Richtung, wodurch die Motorwelle zumindest in radialer Richtung festgelegt werden kann.It when the outer bearing ring is particularly advantageous loosely rests in a receptacle of the end shield, which outer bearing ring in the radial and axial directions sets. The inclusion of the end shield thus forms a stop for the rolling bearing in axial and radial Direction, causing the motor shaft to be at least radial Direction can be set.

Bei einer bevorzugten Ausführungsform der Erfindung ist vorgesehen, daß die Aufnahme zur Taumelscheibe hin offen ist. Dies erleichtert die Montage, da das Wälzlager von der Kolbenseite her in die Aufnahme hineingelegt werden kann.In a preferred embodiment of the invention provided that the recording to the swash plate open is. This facilitates assembly, since the rolling bearing inserted into the receptacle from the piston side can be.

Besonders vorteilhaft ist es, wenn die Motorwelle und die Taumelscheibe durch die Kolben federnd in den Motor hineingedrückt sind. Die Gehäuse des Motors und der Pumpe sind typischerweise fest miteinander verbunden. Die Kolben der Pumpe sind von Federn umgeben, die sich am Pumpengehäuse abstützen und die die Kolben gegen die Taumelscheibe drücken. Die Kolbenachse und die Längsachse der Motorwelle verlaufen in der Regel parallel. Dadurch drücken die Kolbenfeder die Taumelscheibe mit der daran befestigten Motorwelle in Richtung des Motorgehäuses.It when the motor shaft and the swashplate resiliently into the engine through the pistons are pushed in. The housing of the engine and the Pumps are typically firmly connected. The pistons of the pump are surrounded by springs that are Support on the pump housing and the pistons against the Press swashplate. The piston axis and the longitudinal axis the motor shaft are usually parallel. This causes the piston spring to push the swash plate the attached motor shaft in the direction of the motor housing.

Günstig ist es, wenn die Einschubtiefe der Motorwelle durch einen Anschlag begrenzt wird. Über den Anschlag stützt sich die Motorwelle am Motorgehäuse ab. Die Gegenkraft zu der von den Kolbenfedern ausgeübten Kraft auf die Motorwelle wird von dem Anschlag aufgebracht, wodurch die Motorwelle in axialer Richtung festgelegt werden kann.It is beneficial if the insertion depth of the motor shaft is limited by a stop. About the attack the motor shaft is supported on the motor housing. The drag to the force exerted by the piston springs is applied to the motor shaft from the stop, whereby the motor shaft is fixed in the axial direction can be.

Bei einer bevorzugten Ausführungsform der Erfindung ist vorgesehen, daß der Anschlag durch das Lager der Motorwelle gebildet wird, das sich seinerseits am Lagerschild des Motors abstützt. Auf diese Weise wirkt die Kraft der Kolbenfedern über das Wälzlager auf das Lagerschild des Motors. Das Wälzlager wird somit durch die Kraft der Kolbenfedern gegen das Motorgehäuse gepreßt.In a preferred embodiment of the invention provided that the stop through the bearing of the motor shaft is formed, which in turn is on the end shield supports the engine. In this way it works Force of the piston springs via the roller bearing on the end shield of the motor. The roller bearing is thus through the force of the piston springs pressed against the motor housing.

Besonders vorteilhaft ist es, wenn die Taumelscheibe stirnseitig an dem taumelscheibenseitigen Lager anliegt. Dadurch wird eine Verbindung zwischen dem taumelscheibenseitigen Lager und der Motorwelle hergestellt, da die Taumelscheibe mit der Motorwelle drehfest verbunden ist. Der innere Lagerring umgibt die Motorwelle nur lose. It is particularly advantageous if the swash plate abuts the swash plate-side bearing. This creates a connection between the swash plate side Bearings and the motor shaft, because the swashplate is rotatably attached to the motor shaft connected is. The inner bearing ring surrounds the motor shaft only loose.

Grundsätzlich kann vorgesehen sein, daß die Taumelscheibe stirnseitig am inneren Lagerring des taumelscheibenseitigen Lagers anliegt. Da die Taumelscheibe die beiden Lagerringe nicht gleichzeitig berührt, ist sichergestellt, daß sich die Lagerringe relativ zueinander verdrehen können.Basically, it can be provided that the swash plate face on the inner bearing ring of the swash plate Bearing is present. Because the swashplate is not touching the two bearing rings at the same time ensures that the bearing rings are relative to each other can twist.

Besonders günstig ist es, wenn die Aufnahme als einseitig offene Schale mit nach innen springender Stufe ausgebildet ist und daß der innere Lagerring nicht an der Stufe anliegt. Wie bereits beschrieben, wirken die Federkräfte der Kolbenfedern auf die Taumelscheibe, diese wiederum ist drehfest mit der Motorwelle verbunden. Die Taumelscheibe stützt sich aber am inneren Lagerring des Wälzlagers ab. Der äußere Lagerring liegt lose in der einseitig offenen Schale mit nach innen springender Stufe. Dies führt zu einem Kraftschluß, der die wirkende Kraft der Kolbenfedern über die Taumelscheibe, die innere Lagerschale, die Kugeln und die äußere Lagerschale auf die Stufe des Lagerschildes überträgt. Die Auswahl von Kolbenfedern mit entsprechend großer Federkonstante hat zur Folge, daß die Taumelscheibe und damit die Motorwelle über das Wälzlager so in den Motorblock hineingepreßt werden, daß sich zwischen der Taumelscheibe und der inneren Lagerschale sowie der äußeren Lagerschale und dem Lagerschild ein Reibschluß ausbildet. Eine drehfeste Verbindung von Motorwelle und innerer Lagerschale einerseits sowie äußerer Lagerschale und Lagerschild andererseits, wie sie aus dem Stand der Technik bekannt ist, wird dadurch überflüssig. It is particularly favorable if the recording is one-sided open bowl with an inwardly jumping step and that the inner bearing ring is not on the Level applies. As already described, the spring forces act the piston springs on the swash plate, this in turn is non-rotatably connected to the motor shaft. The Swashplate is supported on the inner bearing ring of the Rolling bearing. The outer bearing ring is loose in the shell open on one side with inward jumping Step. This leads to a frictional connection, which is the effective one Force the piston springs over the swash plate, the inner bearing shell, the balls and the outer bearing shell transfers to the level of the end shield. The Selection of piston springs with a correspondingly large spring constant has the consequence that the swash plate and thus the motor shaft through the roller bearing into the motor block be pressed in that between the swash plate and the inner bearing shell as well as the outer Bearing shell and the end shield forms a frictional connection. A rotatable connection between the motor shaft and inner bearing shell on the one hand and outer bearing shell and bearing plate, on the other hand, as they stand the technology is known, it is unnecessary.

Bei einer bevorzugten Ausführungsform ist vorgesehen, daß das Wälzlager als Kugellager ausgebildet ist.In a preferred embodiment, that the rolling bearing is designed as a ball bearing.

Die nachfolgende Beschreibung einer bevorzugten Ausführungsform der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung.The following description of a preferred embodiment the invention serves in connection with the Drawing of the detailed explanation.

Die Zeichnung zeigt einen Längsschnitt durch einen Elektromotor mit einer daran gekoppelten Kolbenpumpe eines Hochdruckreinigungsgerätes.The drawing shows a longitudinal section through a Electric motor with a piston pump coupled to it a high-pressure cleaning device.

Der in Figur 1 dargestellte Elektromotor 1 eines Hochdruckreinigungsgerätes umfaßt ein Gehäuse 2, in dem eine in horizontaler Richtung verlaufende Motorwelle 3 angeordnet ist. An ihrem aus dem Elektromotor 1 hervorstehenden freien Ende trägt die Motorwelle 3 eine Taumelscheibe 4, in der über ein Kugellager 5 eine Andruckscheibe 6 drehbar gelagert ist. An dieser stützen sich Kolben 7 einer in der Zeichnung nicht näher dargestellten Kolbenpumpe ab, die durch die Kolben 7 umgebende Schraubenfedern 8 gegen die Andruckschreibe 6 gedrückt werden. Der Elektromotor 1 befindet sich in einem Gehäuse 2, an welches sich ein die Taumelscheibe 4, die Kolben 7 und die nicht dargestellte Pumpe umgebendes Pumpengehäuse 9 anschließt. Im Übergangsbereich bildet eine Querwand 10 ein Lagerschild aus, in dem sich der äußere Käfig 11 eines Kugellagers abstützt, durch welches die Motorwelle 3 in der Querwand 10 gelagert ist. Die Querwand 10 ist zur Ausbildung des Lagerschildes zweistufig ausgenommen, wobei die zweite Stufe 13 gerade so breit ist, daß sich nur der äußere Käfig 11 des Kugellagers 12 an der Stufe 13 abstützt. The electric motor 1 of a high-pressure cleaning device shown in FIG. 1 comprises a housing 2 in which a motor shaft 3 running in the horizontal direction is arranged. On her protruding from the electric motor 1 free end, the motor shaft 3 carries a swash plate 4, in which a pressure plate via a ball bearing 5 6 is rotatably mounted. Support this piston 7 one not shown in the drawing Piston pump from the surrounding by the piston 7 Coil springs 8 pressed against the pressure pad 6 become. The electric motor 1 is in a housing 2, on which the swash plate 4, surrounding the piston 7 and the pump, not shown Pump housing 9 connects. In the transition area a transverse wall 10 forms a bearing plate in which the outer cage 11 of a ball bearing is supported, through which the motor shaft 3 is mounted in the transverse wall 10 is. The transverse wall 10 is used to form the end shield exempted in two stages, the second stage 13 is just so wide that only the outer cage 11 of the ball bearing 12 is supported on the step 13.

Der innere Käfig 14 des Kugellagers 12 umgibt die Motorwelle 3 lose. Die Taumelscheibe 4 erstreckt sich über die Stirnfläche der Motorwelle 3 in radialer Richtung gerade so weit, daß sie den inneren Käfig 14 des Kugellagers 12 überdeckt, den äußeren Käfig 11 jedoch nicht berührt. Die Taumelscheibe 4 ist beispielsweise über einen Zuganker, der nicht dargestellt ist, drehfest mit der Motorwelle 3 verbunden.The inner cage 14 of the ball bearing 12 surrounds the motor shaft 3 loose. The swash plate 4 extends over the end face of the motor shaft 3 in the radial direction just so far that it the inner cage 14 of the Ball bearing 12 covered, but the outer cage 11 not touched. The swash plate 4 is for example via a tie rod, which is not shown, rotatably connected to the motor shaft 3.

Die Schraubenfedern 8 stützen sich am Pumpengehäuse ab und pressen die Kolben 7 gegen die Taumelscheibe 4. Diese wiederum steht mit dem inneren Käfig 14 des Kugellagers 12 in Kontakt, der durch Kraftschluß über die Kugeln 15 auf den äußeren Käfig und damit auf die Stufe 13 der Querwand 10 des Gehäuses 2 wirkt. Die bei herkömmlichen Hochdruckreinigungsgeräten bevorzugte drehfeste Verbindung von innerem Käfig 14 und Motorwelle 13, beispielsweise durch Aufschrumpfen des inneren Käfigs 14 auf die Motorwelle 3, wird bei der vorliegenden Ausführungsform überflüssig. Der Anpreßdruck der Schraubenfedern 8 ist so groß, daß sich zwischen der Taumelscheibe 4 und dem inneren Käfig 14 sowie dem äußeren Käfig 11 und der Stufe 13 ein Reibschluß ausbildet, der quasi eine drehfeste Verbindung zwischen Motorwelle 3 und innerem Käfig 14 über die Taumelscheibe 4 sowie eine weitere drehfeste Verbindung zwischen dem äußeren Käfig 11 und der Querwand 10 bzw. der Stufe 13 realisiert.The coil springs 8 are supported on the pump housing and press the pistons 7 against the swash plate 4. This in turn stands with the inner cage 14 of the ball bearing 12 in contact by frictional connection over the Balls 15 on the outer cage and thus on the step 13 of the transverse wall 10 of the housing 2 acts. The conventional one Pressure washers preferred non-rotatable Connection of inner cage 14 and motor shaft 13, for example by shrinking the inner cage 14 on the motor shaft 3, is in the present Embodiment unnecessary. The contact pressure of the Coil springs 8 is so large that between the Swash plate 4 and the inner cage 14 and the outer cage 11 and the step 13 forms a frictional connection, the quasi a rotatable connection between Motor shaft 3 and inner cage 14 over the swash plate 4 and another non-rotatable connection between the outer cage 11 and the transverse wall 10 or the step 13 realized.

Diese Ausführungsform vereinfacht vor allem die Montage des Hochdruckreinigungsgerätes und gestattet größere Fertigungstoleranzen bei den Durchmessern der Lagerringe und der Motorwelle. Das Kugellager 12 wird einfach in die zweistufige Ausnehmung der Querwand 10 eingelegt und die drehfest mit der Taumelscheibe 4 verbundene Motorwelle 3 in den Elektromotor 1 hineingesteckt.This embodiment primarily simplifies assembly of the high-pressure cleaning device and allows larger ones Manufacturing tolerances in the diameters of the bearing rings and the motor shaft. The ball bearing 12 becomes simple inserted into the two-stage recess of the transverse wall 10 and the motor shaft non-rotatably connected to the swash plate 4 3 inserted into the electric motor 1.

Claims (10)

  1. A high-pressure cleaning appliance, having a motor and a piston pump which is driven by the latter and the pistons of which rest in a sprung manner against a swash plate driven by the motor, having a motor shaft mounted in a rotatable manner at both ends and connected in a rotationally fixed manner at one end to the swash plate, and having a rolling bearing with two concentric bearing rings (11, 12) on the end towards the swash plate, the outer of the said bearing rings being held in a bearing shield of the motor, whilst the inner bearing ring surrounds the motor shaft, characterized in that the inner bearing ring (14) surrounds the motor shaft (3) in a loose manner.
  2. An appliance according to Claim 1, characterized in that the outer bearing ring (11) rests loosely in a receiving means (13) of the bearing shield (10) which fixes the outer bearing ring (11) in the radial direction and in an axial direction.
  3. An appliance according to Claim 2, characterized in that the receiving means (10, 13) is open towards the swash plate (4).
  4. An appliance according to one of the preceding Claims, characterized in that the motor shaft (3) and the swash plate (4) are pressed into the motor (1) by the pistons (7) in a sprung manner.
  5. An appliance according to Claim 4, characterized in that the depth of insertion of the motor shaft (3) is limited by a stop (14).
  6. An appliance according to Claim 5, characterized in that the stop (14) is formed by the bearing (12) of the motor shaft which is in turn supported on the bearing shield (13) of the motor (1).
  7. An appliance according to Claim 6, characterized in that the end face of the swash plate (4) rests against the bearing (12) towards the swash plate.
  8. An appliance according to Claim 7, characterized in that the end face of the swash plate (4) rests against the inner bearing ring (14) of the bearing (12) towards the swash plate.
  9. An appliance according to one of Claims 2 to 8, characterized in that the receiving means (10, 13) is constructed in the form of a shell open on one side and with a step (13) springing inwards, and the inner bearing ring (14) does not rest against the step (13).
  10. An appliance according to one of the preceding Claims, characterized in that the rolling bearing (12) is constructed in the form of a ball bearing (12).
EP98966373A 1998-01-10 1998-12-18 High pressure cleaning device Expired - Lifetime EP1045989B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19800680A DE19800680A1 (en) 1998-01-10 1998-01-10 High pressure cleaning device
DE19800680 1998-01-10
PCT/EP1998/008332 WO1999035397A1 (en) 1998-01-10 1998-12-18 High pressure cleaning device

Publications (2)

Publication Number Publication Date
EP1045989A1 EP1045989A1 (en) 2000-10-25
EP1045989B1 true EP1045989B1 (en) 2002-03-20

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EP98966373A Expired - Lifetime EP1045989B1 (en) 1998-01-10 1998-12-18 High pressure cleaning device

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Country Link
US (1) US6499962B1 (en)
EP (1) EP1045989B1 (en)
AU (1) AU2275099A (en)
BR (1) BR9814810A (en)
DE (2) DE19800680A1 (en)
DK (1) DK1045989T3 (en)
WO (1) WO1999035397A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014253A1 (en) 2008-03-13 2009-09-17 Schaeffler Kg Wobble bearing for use in axial piston pump of high pressure cleaning equipment, has bearing cage comprising rims that increase retention ability of bearing grease in effective direction of centrifugal forces acting on roller bearing
DE102008014974A1 (en) 2008-03-19 2009-09-24 Schaeffler Kg Wobble bearing for use in axial-piston pump of high pressure cleaning equipment, has wobble body provided with circumferential flanging for undetachably holding wobbling disk, where flanging is placed radially outward to wobbling disk
DE102008051433A1 (en) 2008-10-15 2010-04-22 Schaeffler Kg Oscillating bearing i.e. ball bearing, for use in e.g. sealed and oil immersed pump of high pressure cleaning equipment, has retaining unit formed by casing utilized for axially and radially enclosing oscillating body and thrust washer
DE102008051333A1 (en) 2008-10-15 2010-04-22 Alfred Kärcher Gmbh & Co. Kg Wobble bearing for use in axial piston pump, has wobble body and wobble disk oppositely supported by roller body, where bearing is connected with drive shaft of motor in electrically insulated manner
DE102008051434A1 (en) 2008-10-15 2010-04-22 Schaeffler Kg Wobble bearing i.e. ball bearing, for use in e.g. sealed and oil-immersed pump of high pressure cleaning equipment, has end-side brackets for engaging sleeve in recess, where sleeve axially and radially inwardly overlaps other recess

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DE102005023449A1 (en) * 2005-05-20 2006-12-14 Schaeffler Kg Swash plate mechanism
DE102006058355A1 (en) * 2006-03-10 2007-09-13 Brueninghaus Hydromatik Gmbh Combi pump housing for several nominal sizes

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014253A1 (en) 2008-03-13 2009-09-17 Schaeffler Kg Wobble bearing for use in axial piston pump of high pressure cleaning equipment, has bearing cage comprising rims that increase retention ability of bearing grease in effective direction of centrifugal forces acting on roller bearing
DE102008014974A1 (en) 2008-03-19 2009-09-24 Schaeffler Kg Wobble bearing for use in axial-piston pump of high pressure cleaning equipment, has wobble body provided with circumferential flanging for undetachably holding wobbling disk, where flanging is placed radially outward to wobbling disk
DE102008014974B4 (en) * 2008-03-19 2016-06-23 Schaeffler Technologies AG & Co. KG Swash bearing and method for its production
DE102008051433A1 (en) 2008-10-15 2010-04-22 Schaeffler Kg Oscillating bearing i.e. ball bearing, for use in e.g. sealed and oil immersed pump of high pressure cleaning equipment, has retaining unit formed by casing utilized for axially and radially enclosing oscillating body and thrust washer
DE102008051333A1 (en) 2008-10-15 2010-04-22 Alfred Kärcher Gmbh & Co. Kg Wobble bearing for use in axial piston pump, has wobble body and wobble disk oppositely supported by roller body, where bearing is connected with drive shaft of motor in electrically insulated manner
DE102008051434A1 (en) 2008-10-15 2010-04-22 Schaeffler Kg Wobble bearing i.e. ball bearing, for use in e.g. sealed and oil-immersed pump of high pressure cleaning equipment, has end-side brackets for engaging sleeve in recess, where sleeve axially and radially inwardly overlaps other recess

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DE59803473D1 (en) 2002-04-25
US6499962B1 (en) 2002-12-31
AU2275099A (en) 1999-07-26
EP1045989A1 (en) 2000-10-25
WO1999035397A1 (en) 1999-07-15
BR9814810A (en) 2000-10-03
DE19800680A1 (en) 1999-07-15
DK1045989T3 (en) 2002-05-27

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