EP1141550A1 - High-pressure cleaner - Google Patents

High-pressure cleaner

Info

Publication number
EP1141550A1
EP1141550A1 EP99950746A EP99950746A EP1141550A1 EP 1141550 A1 EP1141550 A1 EP 1141550A1 EP 99950746 A EP99950746 A EP 99950746A EP 99950746 A EP99950746 A EP 99950746A EP 1141550 A1 EP1141550 A1 EP 1141550A1
Authority
EP
European Patent Office
Prior art keywords
pump
cleaning device
piston
clamping
pressure cleaning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99950746A
Other languages
German (de)
French (fr)
Other versions
EP1141550B1 (en
Inventor
Robert Nathan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP1141550A1 publication Critical patent/EP1141550A1/en
Application granted granted Critical
Publication of EP1141550B1 publication Critical patent/EP1141550B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/145—Housings
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/06—Polyamides, e.g. NYLON

Definitions

  • the invention relates to a high-pressure cleaning device with a piston pump, on which a pump head is placed, into which at least one piston which can be moved back and forth in the longitudinal direction of the piston pump projects, the pump head comprising a suction connection for supplying a cleaning liquid and a pressure connection for dispensing the cleaning liquid, and several Control valves receives and the pump head is made of plastic and is clamped to the piston pump by means of a clamping element.
  • Such a high-pressure cleaning device is known from DE 195 48 498 C2. It proposes to manufacture the pump head from plastic, so that it can be manufactured inexpensively and has a relatively low weight.
  • a tensioning element is proposed in the cited patent specification, with the aid of which the pump head can be tensioned with the piston pump.
  • the clamping element is designed as a truss-like hood with a plurality of webs which extend obliquely to the longitudinal axis of the piston pump, and with a connecting tube into which the pressure connection of the pump head, which is designed as a pressure port, is immersed.
  • the clamping element comprises a support flange which abuts a step of the pressure port and from which the webs extend obliquely to the longitudinal axis of the piston pump in the direction of the piston pump.
  • the tensioning element thus has a construction, which is associated with not inconsiderable manufacturing costs.
  • the object of the present invention is to develop a generic high-pressure cleaning device in such a way that it can be manufactured more cost-effectively and is easier to assemble.
  • the tensioning element has at least one U-shaped tensioning bracket with a base part bearing against the pump head and with two legs oriented essentially in the longitudinal direction of the piston pump, the free ends of which are made of metal Contact surface of a piston guide of the piston pump and are releasably connectable to the piston pump.
  • the tensioning element known from DE 195 48 498 C2 can be considerably simplified.
  • the clamping element has at least one U-shaped clamping bracket, but it must be ensured that the free ends of the clamping bracket rest on a metallic contact surface of the piston guide of the piston pump and with the Piston pump detachably connected, for example screwed.
  • the clamping bracket ensures that the pump head made of plastic can withstand high pressures.
  • the tightening torque with which the clamping bracket is acted upon during assembly is maintained even during continuous operation of the high-pressure cleaning device; loosening of the clamping bracket is avoided.
  • Such loosening occurs particularly when the free ends of the legs of the clamping bracket rest on a plastic part, since this plastic part plasticizes over time due to the large mechanical load exerted by the clamping bracket on the plastic part, that is, one a plastic contact surface is a shrinkage, which leads to a loosening of the clamping element and thus to an impairment of the function of the pump head made of plastic.
  • the contact surface for the tensioning element is therefore made of metal, so that the tensioning element is not loosened during operation of the high-pressure cleaning device. This in turn makes it possible to make the clamping element structurally particularly simple.
  • the assembly of the high-pressure cleaning device can be further simplified in that the piston guide of the piston pump has through openings through which connecting elements for releasably connecting the clamping bracket to the piston pump pass.
  • the piston pump preferably comprises a cup-shaped pump housing, on which the piston guide is placed, and the clamping bracket can preferably be detachably connected to the pump housing. - 4 -
  • the legs of the clamping bracket can extend laterally in the longitudinal direction of the piston pump along the pump head to approximately the level of the pump housing, starting from the base part lying in the region of the end face of the pump head facing away from the piston pump.
  • the piston guide has metallic guide sleeves oriented in the longitudinal direction of the piston pump and facing the pump head, at the free ends of which the legs of the tensioning bracket rest.
  • the free ends of the guide sleeves thus form a metallic contact surface for the clamping bracket, and since the guide sleeves face the pump head, the length of the legs of the clamping bracket can be reduced, thereby achieving a particularly stable construction of the clamping element.
  • the connecting elements for the releasable connection of the clamping bracket to the piston pump are designed as clamping screws which pass through the guide sleeves and are in engagement with a corresponding internal thread of the pump housing.
  • the clamping bracket can be screwed to the pump housing using the clamping screws.
  • the clamping screws reach through the guide sleeves of the piston guide, that is, by connecting the clamping bracket to the pump housing, mechanical retention of the piston guide is achieved at the same time.
  • the clamping screws have an internal thread of the guide sleeves are engaged so that the clamping element can be detachably connected to the piston guide of the piston pump. Additional connecting elements are then provided for the mechanical mounting of the piston guide on the pump housing of the piston pump.
  • the clamping element has two U-shaped clamping brackets, a first clamping bracket encompassing the pump head in its lower region adjacent to the suction connection, while the second clamping bracket encompassing the pump head in its upper region facing away from the suction connection.
  • the two clamping brackets are preferably rigidly connected to one another via a connecting part, since this gives the clamping element a particularly high mechanical stability.
  • the connecting element surrounds the pressure connection of the pump head in an annular manner, since this simplifies the positioning of the clamping element during the assembly of the high-pressure cleaning device. For this it is only necessary to place the clamping element with its connecting part on the pressure connection.
  • the clamping element lies with the base parts of the two clamping brackets on the free end face of the pump head, and due to the connection of the clamping element with the The piston pump exerts a clamping force on the pump head from the base parts.
  • the connecting part has two tabs which project laterally and transversely to the longitudinal direction of the piston pump and which abut the pump head. The contact surface of the clamping element on the pump head is thereby increased, this results in a more uniform loading of the pump head and thus in increased mechanical stability.
  • the tensioning element is formed in one piece. Not only can this reduce manufacturing costs, it also results in a mechanically more stable construction.
  • the tensioning element is preferably made of metal, for example in the form of a sheet metal part.
  • the clamping element is designed as a die-cast part, for example as zinc or aluminum casting.
  • Figure 1 is a schematic longitudinal section of a high pressure cleaning device.
  • FIG. 2 shows a perspective illustration of a tensioning element used in the high-pressure cleaning device from FIG. 1;
  • Fig. 3 is a view of the high pressure cleaning device in
  • Fig. 4 is a view corresponding to FIG. 3 with a tensioning element according to a second embodiment of the invention.
  • Fig. 5 is a view corresponding to FIG. 3 with a clamping element according to a third embodiment of the invention.
  • FIG. 1 shows a high-pressure cleaning device, generally designated by reference number 10, with an electric motor 12, on the end face of which a piston pump 16 is flanged via a fan 13 and a gear 14.
  • This comprises an approximately cup-shaped pump housing 17 with a cylindrical housing shell 18 and a housing base 19, to which a collar 20 is attached, which surrounds the gear 14 in the circumferential direction.
  • a swash plate 21 is positioned within the pump housing 17, against which a plurality of pistons 23 bear, which move back and forth in the longitudinal direction of the piston pump 16 due to the rotary movement of the swash plate 21.
  • the piston pump 16 also includes a piston guide 25 which is placed on the cup-shaped pump housing 17 and forms a guide for the pistons 23.
  • a pump head 27 is placed on the piston guide 25 of the piston pump 16. This comprises a pump chamber 29, shown only schematically in the drawing, into which the piston immerse ben 23.
  • the pump head 27 has a suction connection 31 and a pressure connection designed as a pressure connection 33.
  • the suction connection is in flow communication with the pump chamber 29 via a suction valve 35, which in turn is connected with a pressure chamber 38 via a pressure valve 37.
  • the pressure chamber 38 is in flow connection with the pressure connection 33 via a check valve 39 and an injector 40.
  • a cleaning liquid for example water
  • a suction nozzle 41 opening into the suction connection 31.
  • the cleaning liquid flows from the suction connection 31 via the suction valve 35 into the pump chamber 29 and is then pumped under high pressure via the pressure valve 37 and the check valve 39 into the pressure port 33.
  • the injector 40 narrows the flow cross section of the pressurized cleaning fluid, with a cross bore 42 at the point of the narrowest cross section making a connection between the injector 40 and a chemical connection 44, into which a chemical line 46 with a widened connection piece 48 is immersed while an Connection nipple 50 protrudes from the chemical connection 44.
  • the pump head 27 is made of plastic, for example of a polyamide, and is made in two parts.
  • a first part of the pump head forms a cylinder head 52, which has the pump chamber 29 and receives the suction valve 35 and the pressure valve 37.
  • the second part of the pump head 27 is from a control housing 54 is formed, which has the suction connection 31 and the pressure port 33 and the chemical connection 44 and receives the check valve 39 and the injector 40 and the chemical line 46.
  • the tensioning element 56 is shown in perspective in FIG. 2. It comprises an essentially U-shaped first clamping bracket 60 with two legs 61, 62 aligned approximately in the longitudinal direction of the piston pump 16 and a curved base part 63, and a likewise substantially U-shaped second clamping bracket 65 with legs 66, 67 and with a Base part 68.
  • the two base parts 63 and 68 are connected to one another via a rigid connecting part 70, which has a through bore 71 and side walls 72, 73 aligned parallel to the legs 66, 67 of the second clamping bracket 65, at their free end regions transverse to the longitudinal direction of the piston pump 16 aligned retaining tabs 74, 75 protrude.
  • the free ends of the legs 66, 67 and 71, 72 are each designed as retaining rings 66 oriented transversely to the longitudinal direction of the piston pump 16.
  • the tensioning element 56 can be placed on the free end face of the Place the pump head 27 so that the pressure port 33 passes through the through hole 71 and the curved base part 63 of the first clamping bracket 60 bears against the pump head 27 in the area of the suction connection 31, while the base part 68 of the second clamping bracket 65 comes into contact with the pump head 27 in the area of the chemical connection 44 .
  • the base part 68 of the second clamping bracket 65 has a bore 78, through which the connection nipple 50 of the chemical line 46 passes.
  • the pump head 27 is thus encompassed by a clamping bracket both in its lower area adjacent to the suction connection 31 and in its upper area facing away from the suction connection 31 and adjacent to the chemical connection 44.
  • the retaining tabs 74, 75 of the connecting part 70 come to rest on the end face of the pump head 27.
  • the pump head 27 is thus supported in the region of the base parts 63 and 68 and the retaining tabs 74, 75 in the axial direction of the high-pressure cleaning device, and the axial forces occurring in the pump head 27 are absorbed by the tensioning element 56.
  • tensioning element 56 The attachment of the tensioning element 56 to the piston pump 16 is shown in detail in FIGS. 3, 4 and 5, wherein differently designed tensioning elements 56 can be used.
  • the legs of the two clamping brackets of the clamping element 56 extend essentially along the entire pump head 27, that is to say both along the control housing 54 and the cylinder head 52.
  • the piston pump 16 comprises a pump housing 17, on which the piston guide 25 is placed.
  • the piston guide 25 has a guide flange 78, which is made of metal and represents a contact surface for the clamping element 56.
  • the guide flange 78 comprises through bores 80 which are penetrated by clamping screws 82. With the help of the clamping screws 82, the clamping element 56 can be screwed to the pump housing 17.
  • FIG. 4 A second embodiment of the high-pressure cleaning device 10 is shown in FIG. 4. This differs from the embodiment described above in that a guide flange 83 with metallic guide sleeves 84 is used for the piston guide 25, which extend from the pump housing 17 along the cylinder head 52.
  • a clamping element 86 On the free end surfaces of the guide sleeves 84 is a clamping element 86 with its retaining rings 76, which differs from the clamping element 56 described above only in that the legs 61, 62 and 66, 67 are shortened and only run along the control housing 54 of the pump head 27 . Due to the shortened configuration of the legs, the tensioning element 86 is distinguished by a more compact configuration and consequently by a higher mechanical stability.
  • the tensioning element 86 is fastened to the pump housing 17 by means of tensioning screws 88 which pass through the guide sleeves 84 and are in engagement with an internal thread 89 of the pump housing 17.
  • the tensioning screws 88 are thus also used to fasten the tensioning element 86 also for holding the guide flange 83 of the piston guide 25.
  • FIG. 5 A third embodiment of a high-pressure cleaning device is shown in FIG. 5. This also has a tensioning element 86, as has already been described with reference to FIG. 4.
  • a guide flange 91 is provided for the piston guide 25, which has both through bores 92 for the passage of fastening screws 93 and guide sleeves 94, which comprise an internal thread 95 and engage with tensioning screws 96 stand.
  • the tensioning element 86 is fastened to the guide sleeves 94 of the guide flange 91 by means of the tensioning screws 96.
  • the guide flange 91 is in turn fastened by means of separate fastening screws 93 which are offset to the circumferential direction of the guide flange 91 Guide sleeves 94 are arranged.
  • the tensioning element 56 or 86 comes to rest directly on a metallic contact surface in the form of the guide flange 78 or the guide flanges 83 and 91.
  • the releasable connection of the tensioning element 56 or 86 is carried out by means of tensioning screws 82, 88, 93, the tensioning element 56 or 86 being able to be acted upon by the metallic design of the respective contact surface and ensuring that the tensioning element is in operation of the high-pressure cleaning device 10 does not loosen.

Landscapes

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

Abstract

In order for a high-pressure cleaner having a reciprocating pump, on which there is positioned a pump head into which at least one piston, which can be moved back and forth in the longitudinal direction of the reciprocating pump, projects, the pump head comprising a suction connection, for feeding a cleaning liquid, and a pressure connection, for discharging the cleaning liquid, accommodating a plurality of regulating valves, being produced from plastics and being braced with the reciprocating pump by means of a clamping element, to be developed such that it can be produced more cost-effectively and assembled more straightforwardly, it is proposed that the clamping element has at least one U-shaped clamping bracket with a base part butting against the pump head and with two legs which are aligned substantially in the longitudinal direction of the reciprocating pump and the free ends of which butt against an abutment surface, produced from metal, of a piston guide of the reciprocating pump and can be connected releasably to the reciprocating pump.

Description

Hochdruckreinigungsgerät High pressure cleaning device
Die Erfindung betrifft ein Hochdruckreinigungsgerät mit einer Kolbenpumpe, auf die ein Pumpenkopf aufgesetzt ist, in den zumindest ein in Längsrichtung der Kolbenpumpe hin- und herbewegbarer Kolben hineinragt, wobei der Pumpenkopf einen Sauganschluß zum Zuführen einer Reinigungsflüssigkeit und einen Druckanschluß zum Abgeben der Reinigungsflüssigkeit umfaßt und mehrere Steuerventile aufnimmt und wobei der Pumpenkopf aus Kunststoff gefertigt ist und mittels eines Spannelementes mit der Kolbenpumpe verspannt ist.The invention relates to a high-pressure cleaning device with a piston pump, on which a pump head is placed, into which at least one piston which can be moved back and forth in the longitudinal direction of the piston pump projects, the pump head comprising a suction connection for supplying a cleaning liquid and a pressure connection for dispensing the cleaning liquid, and several Control valves receives and the pump head is made of plastic and is clamped to the piston pump by means of a clamping element.
Ein derartiges Hochdruckreinigungsgerät ist aus der DE 195 48 498 C2 bekannt. Darin wird vorgeschlagen, den Pumpenkopf aus Kunststoff zu fertigen, so daß er kostengünstig herstellbar ist und ein relativ geringes Gewicht aufweist. Um den während des Betriebes des Hochdruckreinigungsgerätes auftretenden hohen Drücken und der damit verbundenen beträchtlichen mechanischen Belastung Stand halten zu können, wird in der genannten Patentschrift ein Spannelement vorgeschlagen, mit dessen Hilfe der Pumpenkopf mit der Kolbenpumpe verspannt werden kann. Das Spannelement ist hierbei als fachwerkähnlich ausgestaltete Haube ausgebildet mit einer Vielzahl von Stegen, die sich schräg zur Längsachse der Kolbenpumpe erstrecken, sowie mit einem Anschlußrohr, in das der als Druckstutzen ausgebildete Druckanschluß des Pumpenkopfes eintaucht. Außerdem umfaßt das Spannelement einen Stützflansch, der an einer Stufe des Druckstutzens anliegt und von dem aus sich die Stege schräg zur Längsachse der Kolbenpumpe in Richtung auf die Kolbenpumpe erstrecken. Das Spannelement weist somit eine aufwen- dige Konstruktion auf, die mit nicht unbeträchtlichen Herstellungskosten verbunden ist. Bei der Montage des Hochdruckreinigungsgerätes muß darauf geachtet werden, daß der Stützflansch des Spannelementes flächig auf der korrespondierenden Stufe des Druckstutzens des Pumpenkopfes anliegt.Such a high-pressure cleaning device is known from DE 195 48 498 C2. It proposes to manufacture the pump head from plastic, so that it can be manufactured inexpensively and has a relatively low weight. In order to be able to withstand the high pressures that occur during operation of the high-pressure cleaning device and the associated considerable mechanical stress, a tensioning element is proposed in the cited patent specification, with the aid of which the pump head can be tensioned with the piston pump. The clamping element is designed as a truss-like hood with a plurality of webs which extend obliquely to the longitudinal axis of the piston pump, and with a connecting tube into which the pressure connection of the pump head, which is designed as a pressure port, is immersed. In addition, the clamping element comprises a support flange which abuts a step of the pressure port and from which the webs extend obliquely to the longitudinal axis of the piston pump in the direction of the piston pump. The tensioning element thus has a construction, which is associated with not inconsiderable manufacturing costs. When installing the high-pressure cleaning device, care must be taken to ensure that the support flange of the clamping element lies flat on the corresponding step of the pressure port on the pump head.
Aufgabe der vorliegenden Erfindung ist es, ein gattungsgemäßes Hochdruckreinigungsgerät derart weiterzubilden, daß es kostengünstiger herstellbar und einfacher montierbar ist.The object of the present invention is to develop a generic high-pressure cleaning device in such a way that it can be manufactured more cost-effectively and is easier to assemble.
Diese Aufgabe wird bei einem Hochdruckreinigungsgerät der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß das Spannelement mindestens einen U-förmigen Spannbügel aufweist mit einem am Pumpenkopf anliegenden Basisteil und mit zwei im wesentlichen in Längsrichtung der Kolbenpumpe ausgerichteten Schenkeln, deren freie Enden an einer aus Metall gefertigten Anlagefläche einer Kolbenführung der Kolbenpumpe anliegen und mit der Kolbenpumpe lösbar verbindbar sind.This object is achieved according to the invention in a high-pressure cleaning device of the type described at the outset in that the tensioning element has at least one U-shaped tensioning bracket with a base part bearing against the pump head and with two legs oriented essentially in the longitudinal direction of the piston pump, the free ends of which are made of metal Contact surface of a piston guide of the piston pump and are releasably connectable to the piston pump.
Es wurde erkannt, daß die aus der DE 195 48 498 C2 bekannte Konstruktion des Spannelementes beträchtlich vereinfacht werden kann. Zur Gewährleistung einer einwandfreien Funktion des aus Kunststoff gefertigten Pumpenkopfes ist es lediglich erforderlich, daß das Spannelement zumindest einen U-förmigen Spannbügel aufweist, wobei allerdings sichergestellt werden muß, daß die freien Enden des Spannbügels an einer metallischen Anlagefläche der Kolbenführung der Kolbenpumpe anliegen und mit der Kolbenpumpe lösbar verbunden, beispielsweise verschraubt sind. Der Spannbügel gewährleistet, daß der aus Kunststoff gefertigte Pumpenkopf auch hohen Drücken standhalten kann. Hierzu umgreift der U-förmig ausgestaltete Spannbügel den Pumpenkopf und liegt unmittelbar an einer aus Metall gefertigten Anlagefläche an. Aufgrund der metallischen Ausgestaltung wird das Anzugsmoment, mit dem der Spannbügel bei seiner Montage beaufschlagt wird, auch im Dauerbetrieb des Hochdruckreinigungsgerätes aufrechterhalten, eine Lockerung des Spannbügels wird vermieden. Eine derartige Lockerung tritt insbesondere dann auf, wenn die freien Enden der Schenkel des Spannbügels an einem Kunststoffteil anliegen, da sich dieses Kunststoffteil im Laufe der Zeit aufgrund der großen mechanischen Belastung, die vom Spannbügel auf das Kunststoffteil ausgeübt wird, plastifiziert, das heißt bei einer aus Kunststoff gefertigten Anlagefläche tritt ein Schwund auf, der zu einer Lockerung des Spannelementes und damit zu einer Beeinträchtigung der Funktion des aus Kunststoff gefertigten Pumpenkopfes führt. Erfindungsgemäß ist deshalb die Anlagefläche für das Spannelement aus Metall gefertigt, so daß eine Lockerung des Spannelementes während des Betriebes des Hochdruckreinigungsgerätes unterbleibt. Dies wiederum macht es möglich, das Spannelement konstruktiv besonders einfach auszugestalten.It was recognized that the construction of the tensioning element known from DE 195 48 498 C2 can be considerably simplified. To ensure proper functioning of the plastic pump head, it is only necessary that the clamping element has at least one U-shaped clamping bracket, but it must be ensured that the free ends of the clamping bracket rest on a metallic contact surface of the piston guide of the piston pump and with the Piston pump detachably connected, for example screwed. The clamping bracket ensures that the pump head made of plastic can withstand high pressures. For this purpose, the U-shaped grips designed clamping bracket the pump head and rests directly on a contact surface made of metal. Due to the metallic design, the tightening torque with which the clamping bracket is acted upon during assembly is maintained even during continuous operation of the high-pressure cleaning device; loosening of the clamping bracket is avoided. Such loosening occurs particularly when the free ends of the legs of the clamping bracket rest on a plastic part, since this plastic part plasticizes over time due to the large mechanical load exerted by the clamping bracket on the plastic part, that is, one a plastic contact surface is a shrinkage, which leads to a loosening of the clamping element and thus to an impairment of the function of the pump head made of plastic. According to the invention, the contact surface for the tensioning element is therefore made of metal, so that the tensioning element is not loosened during operation of the high-pressure cleaning device. This in turn makes it possible to make the clamping element structurally particularly simple.
Die Montage des Hochdruckreinigungsgerätes kann dadurch zusätzlich vereinfacht werden, daß die Kolbenführung der Kolbenpumpe Durchgangsöffnungen aufweist, die von Verbindungselementen zum lösbaren Verbinden des Spannbügels mit der Kolbenpumpe durchgriffen werden.The assembly of the high-pressure cleaning device can be further simplified in that the piston guide of the piston pump has through openings through which connecting elements for releasably connecting the clamping bracket to the piston pump pass.
Die Kolbenpumpe umfaßt bevorzugt ein topfförmiges Pumpengehäuse, auf das die Kolbenführung aufgesetzt ist, und der Spannbügel ist vorzugsweise mit dem Pumpengehäuse lösbar verbindbar. - 4 -The piston pump preferably comprises a cup-shaped pump housing, on which the piston guide is placed, and the clamping bracket can preferably be detachably connected to the pump housing. - 4 -
Die Schenkel des Spannbügels können sich ausgehend von dem im Bereich der der Kolbenpumpe abgewandten Stirnfläche des Pumpenkopfes anliegenden Basisteil seitlich in Längsrichtung der Kolbenpumpe entlang des Pumpenkopfes bis ungefähr in Höhe des Pumpengehäuses erstrecken.The legs of the clamping bracket can extend laterally in the longitudinal direction of the piston pump along the pump head to approximately the level of the pump housing, starting from the base part lying in the region of the end face of the pump head facing away from the piston pump.
Alternativ kann vorgesehen sein, daß die Kolbenführung in Längsrichtung der Kolbenpumpe ausgerichtete, dem Pumpenkopf zugewandte metallische Führungshülsen aufweist, an deren freien Enden die Schenkel des Spannbügels anliegen. Die freien Enden der Führungshülsen bilden somit eine metallische Anlagefläche für den Spannbügel, und da die Führungshülsen dem Pumpenkopf zugewandt sind, kann die Länge der Schenkel des Spannbügels reduziert werden, wodurch eine besonders stabile Konstruktion des Spannelementes erzielt wird.Alternatively, it can be provided that the piston guide has metallic guide sleeves oriented in the longitudinal direction of the piston pump and facing the pump head, at the free ends of which the legs of the tensioning bracket rest. The free ends of the guide sleeves thus form a metallic contact surface for the clamping bracket, and since the guide sleeves face the pump head, the length of the legs of the clamping bracket can be reduced, thereby achieving a particularly stable construction of the clamping element.
Bevorzugt ist vorgesehen, daß die Verbindungselemente zum lösbaren Verbinden des Spannbügels mit der Kolbenpumpe als Spannschrauben ausgebildet sind, die die Führungshülsen durchgreifen und mit einem korrespondierenden Innengewinde des Pumpengehäuses in Eingriff stehen. Mittels der Spannschrauben kann der Spannbügel mit dem Pumpengehäuse verschraubt werden. Die Spannschrauben durchgreifen hierbei die Führungshülsen der Kolbenführung, das heißt durch die Verbindung des Spannbügels mit dem Pumpengehäuse wird gleichzeitig eine mechanische Halterung der Kolbenführung erzielt.It is preferably provided that the connecting elements for the releasable connection of the clamping bracket to the piston pump are designed as clamping screws which pass through the guide sleeves and are in engagement with a corresponding internal thread of the pump housing. The clamping bracket can be screwed to the pump housing using the clamping screws. The clamping screws reach through the guide sleeves of the piston guide, that is, by connecting the clamping bracket to the pump housing, mechanical retention of the piston guide is achieved at the same time.
Bei einer besonders hohen mechanischen Belastungen standhaltenden Konstruktion des Hochdruckreinigungsgerätes ist vorgesehen, daß die Spannschrauben mit einem Innengewinde der Führungshülsen in Eingriff stehen, so daß das Spannelement mit der Kolbenführung der Kolbenpumpe lösbar verbindbar ist. Für die mechanische Halterung der Kolbenführung am Pumpengehäuse der Kolbenpumpe sind dann zusätzliche Verbindungselemente vorgesehen.In the case of a construction of the high-pressure cleaning device which withstands particularly high mechanical loads, it is provided that the clamping screws have an internal thread of the guide sleeves are engaged so that the clamping element can be detachably connected to the piston guide of the piston pump. Additional connecting elements are then provided for the mechanical mounting of the piston guide on the pump housing of the piston pump.
Bei einer bevorzugten Ausführungsform weist das Spannelement zwei U-förmige Spannbügel auf, wobei ein erster Spannbügel den Pumpenkopf in seinem dem Sauganschluß benachbarten unteren Bereich umgreift, während der zweite Spannbügel den Pumpenkopf in seinem dem Sauganschluß abgewandten oberen Bereich umgreift. Der Einsatz zweier im wesentlichen spiegelsymmetrisch zu einer in Höhe des Druckanschlusses in Längsrichtung der Kolbenpumpe ausgerichteten Mittelebene ermöglicht eine besonders gleichmäßige mechanische Belastung des Pumpenkopfes. Kippmomente können dadurch zuverlässig verhindert werden.In a preferred embodiment, the clamping element has two U-shaped clamping brackets, a first clamping bracket encompassing the pump head in its lower region adjacent to the suction connection, while the second clamping bracket encompassing the pump head in its upper region facing away from the suction connection. The use of two substantially mirror-symmetrical to a central plane aligned at the height of the pressure connection in the longitudinal direction of the piston pump enables a particularly uniform mechanical load on the pump head. This can reliably prevent tilting moments.
Vorzugsweise sind die beiden Spannbügel über ein Verbindungsteil starr miteinander verbunden, da dadurch das Spannelement eine besonders hohe mechanische Stabilität erhält.The two clamping brackets are preferably rigidly connected to one another via a connecting part, since this gives the clamping element a particularly high mechanical stability.
Von Vorteil ist es, wenn das Verbindungselement den Druckanschluß des Pumpenkopfes ringförmig umgibt, da sich dadurch die Positionierung des Spannelementes bei der Montage des Hochdruckreinigungsgerätes vereinfacht. Hierzu ist es lediglich erforderlich, das Spannelement mit seinem Verbindungsteil auf den Druckanschluß aufzusetzen.It is advantageous if the connecting element surrounds the pressure connection of the pump head in an annular manner, since this simplifies the positioning of the clamping element during the assembly of the high-pressure cleaning device. For this it is only necessary to place the clamping element with its connecting part on the pressure connection.
Das Spannelement liegt mit den Basisteilen der beiden Spannbügel an der freien Stirnfläche des Pumpenkopfes an, und aufgrund der Verbindung des Spannelementes mit der Kolbenpumpe wird von den Basisteilen eine Spannkraft auf den Pumpenkopf ausgeübt. Bei einer vorteilhaften Ausführungsform ist vorgesehen, daß das Verbindungsteil zwei seitlich, quer zur Längsrichtung der Kolbenpumpe abstehende Laschen aufweist, die am Pumpenkopf anliegen. Die Anlagefläche des Spannelementes am Pumpenkopf wird dadurch vergrößert, dies hat eine gleichmäßigere Belastung des Pumpenkopfes und damit eine erhöhte mechanische Stabilität zur Folge.The clamping element lies with the base parts of the two clamping brackets on the free end face of the pump head, and due to the connection of the clamping element with the The piston pump exerts a clamping force on the pump head from the base parts. In an advantageous embodiment it is provided that the connecting part has two tabs which project laterally and transversely to the longitudinal direction of the piston pump and which abut the pump head. The contact surface of the clamping element on the pump head is thereby increased, this results in a more uniform loading of the pump head and thus in increased mechanical stability.
Von Vorteil ist es, wenn das Spannelement einstückig ausgebildet ist. Dadurch können nicht nur die Herstellungskosten reduziert werden, sondern es ergibt sich auch eine mechanisch stabilere Konstruktion.It is advantageous if the tensioning element is formed in one piece. Not only can this reduce manufacturing costs, it also results in a mechanically more stable construction.
Das Spannelement ist vorzugsweise aus Metall, beispielsweise in Form eines Blechteiles, ausgestaltet. Alternativ kann vorgesehen sein, daß das Spannelement als Druckgußteil, beispielsweise als Zink- oder Aluminiumguß ausgebildet ist.The tensioning element is preferably made of metal, for example in the form of a sheet metal part. Alternatively, it can be provided that the clamping element is designed as a die-cast part, for example as zinc or aluminum casting.
Die nachfolgende Beschreibung bevorzugter Ausführungsformen der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. Es zeigen:The following description of preferred embodiments of the invention serves in conjunction with the drawing for a more detailed explanation. Show it:
Fig. 1 einen schematischen Längsschnitt eines Hochdruckreinigungsgerätes;Figure 1 is a schematic longitudinal section of a high pressure cleaning device.
Fig. 2 eine perspektivische Darstellung eines beim Hochdruckreinigungsgerät aus Fig. 1 zum Einsatz kommenden Spannelementes; Fig. 3 eine Ansicht des Hochdruckreinigungsgerätes inFIG. 2 shows a perspective illustration of a tensioning element used in the high-pressure cleaning device from FIG. 1; Fig. 3 is a view of the high pressure cleaning device in
Richtung des Pfeils A aus Fig. 1 mit einem Spannelement gemäß einer ersten Ausführungsform der Erfindung;Direction of arrow A from FIG. 1 with a tensioning element according to a first embodiment of the invention;
Fig. 4 eine Ansicht entsprechend Fig. 3 mit einem Spannelement gemäß einer zweiten Ausführungsform der Erfindung undFig. 4 is a view corresponding to FIG. 3 with a tensioning element according to a second embodiment of the invention and
Fig. 5 eine Ansicht entsprechend Fig. 3 mit einem Spannelement gemäß einer dritten Ausführungsform der Erfindung.Fig. 5 is a view corresponding to FIG. 3 with a clamping element according to a third embodiment of the invention.
In Fig. 1 ist ein insgesamt mit dem Bezugszeichen 10 belegtes Hochdruckreinigungsgerät dargestellt mit einem Elektromotor 12, an dessen Stirnseite über einen Lüfter 13 und ein Getriebe 14 eine Kolbenpumpe 16 angeflanscht ist. Diese umfaßt ein ungefähr topfförmig ausgestaltetes Pumpengehäuse 17 mit einem zylinderförmigen Gehäusemantel 18 und einem Gehäuseboden 19, an den ein Kragen 20 angesetzt ist, der das Getriebe 14 in Umfangsrichtung umgibt. Innerhalb des Pumpengehäuses 17 ist eine Taumelscheibe 21 positioniert, an der mehrere Kolben 23 anliegen, die sich aufgrund der Drehbewegung der Taumelscheibe 21 in Längsrichtung der Kolbenpumpe 16 hin- und herbewegen.1 shows a high-pressure cleaning device, generally designated by reference number 10, with an electric motor 12, on the end face of which a piston pump 16 is flanged via a fan 13 and a gear 14. This comprises an approximately cup-shaped pump housing 17 with a cylindrical housing shell 18 and a housing base 19, to which a collar 20 is attached, which surrounds the gear 14 in the circumferential direction. A swash plate 21 is positioned within the pump housing 17, against which a plurality of pistons 23 bear, which move back and forth in the longitudinal direction of the piston pump 16 due to the rotary movement of the swash plate 21.
Die Kolbenpumpe 16 umfaßt außerdem eine Kolbenführung 25, die auf das topfförmige Pumpengehäuse 17 aufgesetzt ist und eine Führung für die Kolben 23 ausbildet.The piston pump 16 also includes a piston guide 25 which is placed on the cup-shaped pump housing 17 and forms a guide for the pistons 23.
Auf die Kolbenführung 25 der Kolbenpumpe 16 ist ein Pumpenkopf 27 aufgesetzt. Dieser umfaßt einen in der Zeichnung nur schematisch dargestellten Pumpraum 29, in den die Kol- ben 23 eintauchen. Außerdem weist der Pumpenkopf 27 einen Sauganschluß 31 und einen als Druckstutzen 33 ausgestalteten Druckanschluß auf. Der Sauganschluß steht über ein Saugventil 35 mit dem Pumpraum 29 in Strömungsverbindung, der wiederum über ein Druckventil 37 mit einem Druckraum 38 verbunden ist. Der Druckraum 38 steht über ein Rückschlagventil 39 und einen Injektor 40 mit dem Druckstutzen 33 in Strömungsverbindung.A pump head 27 is placed on the piston guide 25 of the piston pump 16. This comprises a pump chamber 29, shown only schematically in the drawing, into which the piston immerse ben 23. In addition, the pump head 27 has a suction connection 31 and a pressure connection designed as a pressure connection 33. The suction connection is in flow communication with the pump chamber 29 via a suction valve 35, which in turn is connected with a pressure chamber 38 via a pressure valve 37. The pressure chamber 38 is in flow connection with the pressure connection 33 via a check valve 39 and an injector 40.
Während des Betriebs des Hochdruckreinigungsgerätes kann eine Reinigungsflüssigkeit, beispielsweise Wasser, über einen in den Sauganschluß 31 einmündenden Saugstutzen 41 dem Pumpenkopf 37 zugeführt werden. Von Sauganschluß 31 strömt die Reinigungsflüssigkeit über das Saugventil 35 in den Pumpraum 29 und wird anschließend unter hohem Druck über das Druckventil 37 und das Rückschlagventil 39 in den Druckstutzen 33 gepumpt.During the operation of the high-pressure cleaning device, a cleaning liquid, for example water, can be supplied to the pump head 37 via a suction nozzle 41 opening into the suction connection 31. The cleaning liquid flows from the suction connection 31 via the suction valve 35 into the pump chamber 29 and is then pumped under high pressure via the pressure valve 37 and the check valve 39 into the pressure port 33.
Der Injektor 40 bildet eine Verengung des Strömungsquerschnitts der unter Druck gesetzten Reinigungsflüssigkeit, wobei an der Stelle des engsten Querschnitts eine Querbohrung 42 eine Verbindung herstellt zwischen dem Injektor 40 und einem Chemikalienanschluß 44, in den eine Chemikalienleitung 46 mit einem verbreiterten Anschlußstück 48 eintaucht, während ein Anschlußnippel 50 aus dem Chemikalienanschluß 44 herausragt.The injector 40 narrows the flow cross section of the pressurized cleaning fluid, with a cross bore 42 at the point of the narrowest cross section making a connection between the injector 40 and a chemical connection 44, into which a chemical line 46 with a widened connection piece 48 is immersed while an Connection nipple 50 protrudes from the chemical connection 44.
Wie insbesondere aus Fig. 3 deutlich wird, ist der Pumpenkopf 27 aus Kunststoff, beispielsweise aus einem Polyamid, gefertigt und zweiteilig ausgebildet. Ein erstes Teil des Pumpenkopfes bildet einen Zylinderkopf 52, der den Pumpraum 29 aufweist und das Saugventil 35 sowie das Druckventil 37 aufnimmt. Der zweite Teil des Pumpenkopfes 27 wird von einem Steuergehäuse 54 gebildet, das den Sauganschluß 31 sowie den Druckstutzen 33 und den Chemikalienanschluß 44 aufweist und das Rückschlagventil 39 sowie den Injektor 40 und die Chemikalienleitung 46 aufnimmt.As is particularly clear from FIG. 3, the pump head 27 is made of plastic, for example of a polyamide, and is made in two parts. A first part of the pump head forms a cylinder head 52, which has the pump chamber 29 and receives the suction valve 35 and the pressure valve 37. The second part of the pump head 27 is from a control housing 54 is formed, which has the suction connection 31 and the pressure port 33 and the chemical connection 44 and receives the check valve 39 and the injector 40 and the chemical line 46.
Die während des Betriebes des Hochdruckreinigungsgerätes 10 auftretenden, in Längsrichtung der Kolbenpumpe 16 wirkenden Axialkräfte werden von einem an der der Kolbenpumpe 16 abgewandten freien Stirnfläche des Pumpenkopfes 27 angeordneten Spannelement 56 aufgenommen. Dieses ist, wie nachfolgend noch näher erläutert wird, mittels Spannschrauben 58 mit der Kolbenpumpe 16 verschraubt.The axial forces which occur during operation of the high-pressure cleaning device 10 and act in the longitudinal direction of the piston pump 16 are absorbed by a tensioning element 56 arranged on the free end face of the pump head 27 facing away from the piston pump 16. As will be explained in more detail below, this is screwed to the piston pump 16 by means of clamping screws 58.
Das Spannelement 56 ist in Fig. 2 perspektivisch dargestellt. Es umfaßt einen im wesentlichen U-förmig ausgebildeten ersten Spannbügel 60 mit zwei ungefähr in Längsrichtung der Kolbenpumpe 16 ausgerichteten Schenkeln 61, 62 und einem gekrümmten Basisteil 63 sowie einen ebenfalls im wesentlichen U-förmig ausgestalteten zweiten Spannbügel 65 mit Schenkeln 66, 67 und mit einem Basisteil 68. Die beiden Basisteile 63 und 68 sind über ein starres Verbindungsteil 70 miteinander verbunden, welches eine Durchgangsbohrung 71 aufweist sowie parallel zu den Schenkeln 66, 67 des zweiten Spannbügels 65 ausgerichtete Seitenwände 72, 73, an deren freien Endbereichen quer zur Längsrichtung der Kolbenpumpe 16 ausgerichtete Haltelaschen 74, 75 abstehen.The tensioning element 56 is shown in perspective in FIG. 2. It comprises an essentially U-shaped first clamping bracket 60 with two legs 61, 62 aligned approximately in the longitudinal direction of the piston pump 16 and a curved base part 63, and a likewise substantially U-shaped second clamping bracket 65 with legs 66, 67 and with a Base part 68. The two base parts 63 and 68 are connected to one another via a rigid connecting part 70, which has a through bore 71 and side walls 72, 73 aligned parallel to the legs 66, 67 of the second clamping bracket 65, at their free end regions transverse to the longitudinal direction of the piston pump 16 aligned retaining tabs 74, 75 protrude.
Die freien Enden der Schenkel 66, 67 und 71, 72 sind jeweils als quer zur Längsrichtung der Kolbenpumpe 16 ausgerichtete Halteringe 66 ausgestaltet.The free ends of the legs 66, 67 and 71, 72 are each designed as retaining rings 66 oriented transversely to the longitudinal direction of the piston pump 16.
Bei der Montage des Hochdruckreinigungsgerätes 10 läßt sich das Spannelement 56 derart auf die freie Stirnfläche des Pumpenkopfes 27 aufsetzen, daß der Druckstutzen 33 die Durchgangsbohrung 71 durchgreift und das gekrümmte Basisteil 63 des ersten Spannbügels 60 im Bereich des Sauganschlusses 31 am Pumpenkopf 27 anliegt, während das Basisteil 68 des zweiten Spannbügels 65 im Bereich des Chemikalienanschlusses 44 am Pumpenkopf 27 zur Anlage kommt. Um einen Zugang zum Chemikalienanschluß 44 zu ermöglichen, weist das Basisteil 68 des zweiten Spannbügels 65 eine Bohrung 78 auf, die vom Anschlußnippel 50 der Chemikalienleitung 46 durchgriffen wird. Der Pumpenkopf 27 wird somit sowohl in seinem unteren, dem Sauganschluß 31 benachbarten Bereich als auch in seinem oberen, dem Sauganschluß 31 abgewandten und dem Chemikalienanschluß 44 benachbarten Bereich jeweils von einem Spannbügel umgriffen. Zusätzlich kommen die Haltelaschen 74, 75 des Verbindungsteiles 70 an der Stirnseite des Pumpenkopfes 27 zur Anlage. Der Pumpenkopf 27 wird somit im Bereich der Basisteile 63 und 68 und der Haltelaschen 74, 75 in Axialrichtung des Hochdruckreinigungsgerätes abgestützt, und die im Pumpenkopf 27 auftretenden Axialkräfte werden vom Spannelement 56 aufgenommen.When mounting the high-pressure cleaning device 10, the tensioning element 56 can be placed on the free end face of the Place the pump head 27 so that the pressure port 33 passes through the through hole 71 and the curved base part 63 of the first clamping bracket 60 bears against the pump head 27 in the area of the suction connection 31, while the base part 68 of the second clamping bracket 65 comes into contact with the pump head 27 in the area of the chemical connection 44 . In order to enable access to the chemical connection 44, the base part 68 of the second clamping bracket 65 has a bore 78, through which the connection nipple 50 of the chemical line 46 passes. The pump head 27 is thus encompassed by a clamping bracket both in its lower area adjacent to the suction connection 31 and in its upper area facing away from the suction connection 31 and adjacent to the chemical connection 44. In addition, the retaining tabs 74, 75 of the connecting part 70 come to rest on the end face of the pump head 27. The pump head 27 is thus supported in the region of the base parts 63 and 68 and the retaining tabs 74, 75 in the axial direction of the high-pressure cleaning device, and the axial forces occurring in the pump head 27 are absorbed by the tensioning element 56.
Die Befestigung des Spannelementes 56 an der Kolbenpumpe 16 ist in den Fig. 3, 4 und 5 detailliert dargestellt, wobei unterschiedlich ausgestaltete Spannelemente 56 zum Einsatz kommen können.The attachment of the tensioning element 56 to the piston pump 16 is shown in detail in FIGS. 3, 4 and 5, wherein differently designed tensioning elements 56 can be used.
Gemäß einer ersten, in der Fig. 3 dargestellten Ausführungsform erstrecken sich die Schenkel der beiden Spannbügel des Spannelementes 56 im wesentlichen entlang des gesamten Pumpenkopfs 27, das heißt sowohl entlang des Steuergehäuses 54 als auch des Zylinderkopfes 52. Wie bereits erläutert, umfaßt die Kolbenpumpe 16 ein Pumpengehäuse 17, auf das die Kolbenführung 25 aufgesetzt ist. Hierzu weist die Kolbenführung 25 einen Führungsflansch 78 auf, der aus Metall gefertigt ist und eine Anlagefläche für das Spannelement 56 darstellt.According to a first embodiment shown in FIG. 3, the legs of the two clamping brackets of the clamping element 56 extend essentially along the entire pump head 27, that is to say both along the control housing 54 and the cylinder head 52. As already explained, the piston pump 16 comprises a pump housing 17, on which the piston guide 25 is placed. For this purpose, the piston guide 25 has a guide flange 78, which is made of metal and represents a contact surface for the clamping element 56.
Bei dem in Fig. 3 dargestellten ersten Ausführungsbeispiel umfaßt der Führungsflansch 78 Durchgangsbohrungen 80, die von Spannschrauben 82 durchgriffen werden. Mit Hilfe der Spannschrauben 82 kann das Spannelement 56 mit dem Pumpengehäuse 17 verschraubt werden.In the first exemplary embodiment shown in FIG. 3, the guide flange 78 comprises through bores 80 which are penetrated by clamping screws 82. With the help of the clamping screws 82, the clamping element 56 can be screwed to the pump housing 17.
Eine zweite Ausführungsform des Hochdruckreinigungsgerätes 10 ist in Fig. 4 dargestellt. Diese unterscheidet sich von der voranstehend beschriebenen Ausgestaltung dadurch, daß für die Kolbenführung 25 ein Führungsflansch 83 mit metallisch ausgebildeten Führungshülsen 84 zum Einsatz kommt, die sich ausgehend vom Pumpengehäuse 17 entlang des Zylinderkopfes 52 erstrecken. An den freien Endflächen der Führungshülsen 84 liegt ein Spannelement 86 mit seinen Halteringen 76 an, das sich vom voranstehend beschriebenen Spannelement 56 lediglich dadurch unterscheidet, daß die Schenkel 61, 62 und 66, 67 verkürzt sind und nur entlang des Steuergehäuses 54 des Pumpenkopfes 27 verlaufen. Aufgrund der verkürzten Ausgestaltung der Schenkel zeichnet sich das Spannelement 86 durch eine kompaktere Ausgestaltung und demzufolge durch eine höhere mechanische Stabilität aus. Die Befestigung des Spannelementes 86 am Pumpengehäuse 17 erfolgt mittels Spannschrauben 88, die die Führungshülsen 84 durchgreifen und mit einem Innengewinde 89 des Pumpengehäuses 17 in Eingriff stehen. Die Spannschrauben 88 dienen somit zusätzlich zur Befestigung des Spann- elementes 86 auch zur Halterung des Führungsflansches 83 der Kolbenführung 25.A second embodiment of the high-pressure cleaning device 10 is shown in FIG. 4. This differs from the embodiment described above in that a guide flange 83 with metallic guide sleeves 84 is used for the piston guide 25, which extend from the pump housing 17 along the cylinder head 52. On the free end surfaces of the guide sleeves 84 is a clamping element 86 with its retaining rings 76, which differs from the clamping element 56 described above only in that the legs 61, 62 and 66, 67 are shortened and only run along the control housing 54 of the pump head 27 . Due to the shortened configuration of the legs, the tensioning element 86 is distinguished by a more compact configuration and consequently by a higher mechanical stability. The tensioning element 86 is fastened to the pump housing 17 by means of tensioning screws 88 which pass through the guide sleeves 84 and are in engagement with an internal thread 89 of the pump housing 17. The tensioning screws 88 are thus also used to fasten the tensioning element 86 also for holding the guide flange 83 of the piston guide 25.
Eine dritte Ausführungsform eines Hochdruckreinigungsgerätes ist in Fig. 5 dargestellt. Diese weist ebenfalls ein Spannelement 86 auf, wie es bereits mit Bezug auf die Fig. 4 beschrieben wurde. Im Gegensatz zur zweiten Ausführungsform ist allerdings bei der in Fig. 5 dargestellten Ausgestaltung für die Kolbenführung 25 ein Führungsflansch 91 vorgesehen, der sowohl Durchgangsbohrungen 92 zum Durchgriff von Befestigungsschrauben 93 aufweist als auch Führungshülsen 94, die ein Innengewinde 95 umfassen und mit Spannschrauben 96 in Eingriff stehen. Bei der in Fig. 5 dargestellten dritten Ausführungsform erfolgt die Befestigung des Spannelementes 86 mittels der Spannschrauben 96 an den Führungshülsen 94 des Führungsflansches 91. Die Befestigung des Führungsflansches 91 wiederum erfolgt mittels gesonderter Befestigungsschrauben 93, die in Umfangsrich- tung des Führungsflansches 91 versetzt zu den Führungshülsen 94 angeordnet sind.A third embodiment of a high-pressure cleaning device is shown in FIG. 5. This also has a tensioning element 86, as has already been described with reference to FIG. 4. In contrast to the second embodiment, in the embodiment shown in FIG. 5, a guide flange 91 is provided for the piston guide 25, which has both through bores 92 for the passage of fastening screws 93 and guide sleeves 94, which comprise an internal thread 95 and engage with tensioning screws 96 stand. In the third embodiment shown in FIG. 5, the tensioning element 86 is fastened to the guide sleeves 94 of the guide flange 91 by means of the tensioning screws 96. The guide flange 91 is in turn fastened by means of separate fastening screws 93 which are offset to the circumferential direction of the guide flange 91 Guide sleeves 94 are arranged.
Bei allen drei voranstehend beschriebenen Ausführungsformen des Hochdruckreinigungsgerätes ist vorgesehen, daß das Spannelement 56 bzw. 86 unmittelbar an einer metallisch ausgebildeten Anlagefläche in Form des Führungsflansches 78 bzw. der Führungsflansche 83 und 91 zur Anlage kommt. Die lösbare Verbindung des Spannelementes 56 bzw. 86 erfolgt mittels Spannschrauben 82, 88, 93, wobei durch die metallische Ausgestaltung der jeweiligen Anlagefläche das Spannelement 56 bzw. 86 mit einem hohen Anzugsmoment beaufschlagt werden kann und sichergestellt ist, daß sich das Spannelement während des Betriebes des Hochdruckreinigungsgerätes 10 nicht lockert. Die im zweiteilig, aus Kunststoff WOJOO/37802 PCT/EP99/07831In all three embodiments of the high-pressure cleaning device described above, it is provided that the tensioning element 56 or 86 comes to rest directly on a metallic contact surface in the form of the guide flange 78 or the guide flanges 83 and 91. The releasable connection of the tensioning element 56 or 86 is carried out by means of tensioning screws 82, 88, 93, the tensioning element 56 or 86 being able to be acted upon by the metallic design of the respective contact surface and ensuring that the tensioning element is in operation of the high-pressure cleaning device 10 does not loosen. The two-part, made of plastic WOJOO / 37802 PCT / EP99 / 07831
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gefertigten Pumpenkopf 27 auftretenden Axialkräfte werden dadurch zuverlässig vom Spannelement 56 bzw. 86 aufgenommen und auf das Pumpengehäuse 17 übertragen. manufactured pump head 27 axial forces are thereby reliably absorbed by the clamping element 56 and 86 and transmitted to the pump housing 17.

Claims

ΛVO-tfO/37802 PCT/EP99/07831- 14 -P A T E N T A N S P R Ü C H E ΛVO-tfO / 37802 PCT / EP99 / 07831- 14 -PATENT CLAIMS
1. Hoσhdruckreinigungsgerät mit einer Kolbenpumpe, auf die ein Pumpenkopf aufgesetzt ist, in den zumindest ein in Längsrichtung der Kolbenpumpe hin- und herbewegbarer Kolben hineinragt, wobei der Pumpenkopf einen Sauganschluß zum Zuführen einer Reinigungsflüssigkeit und einen Druckanschluß zum Abgeben der Reinigungs- flüssigkeit umfaßt und mehrere Steuerventile aufnimmt und wobei der Pumpenkopf aus Kunststoff gefertigt ist und mittels eines Spannelementes mit der Kolbenpumpe verspannt ist, d a d u r c h g e k e n n z e i c h n e , daß das Spannelement (56; 86) mindestens einen U-förmigen Spannbügel (60, 65) aufweist mit einem am Pumpenkopf (27) anliegenden Basisteil (63 bzw. 68) und mit zwei im wesentlichen in Längsrichtung der Kolbenpumpe (16) ausgerichteten Schenkeln (61, 62 bzw. 66, 67 ) , deren freien Enden ( 76 ) an einer aus Metall gefertigten Anlagefläche (78; 83; 91) einer Kolbenführung (25) der Kolbenpumpe (16) anliegen und mit der Kolbenpumpe (16) lösbar verbindbar sind.1. High-pressure cleaning device with a piston pump, on which a pump head is placed, into which at least one piston which can be moved back and forth in the longitudinal direction of the piston pump projects, the pump head comprising a suction connection for supplying a cleaning liquid and a pressure connection for dispensing the cleaning liquid and several Control valves and where the pump head is made of plastic and is clamped to the piston pump by means of a clamping element, characterized in that the clamping element (56; 86) has at least one U-shaped clamping bracket (60, 65) with one against the pump head (27) Base part (63 or 68) and with two legs (61, 62 or 66, 67) oriented essentially in the longitudinal direction of the piston pump (16), the free ends (76) of which on a contact surface (78; 83; 91) made of metal ) of a piston guide (25) of the piston pump (16) and detachably connected to the piston pump (16) are finite.
2. Hochdruckreinigungsgerät nach Anspruch 1, dadurch gekennzeichnet, daß die Kolbenführung (25) Durchgangsöffnungen (80) aufweist, die von Verbindungselementen (82) zum lösbaren Verbinden des Spannbügels (56) mit der Kolbenpumpe (16) durchgriffen werden. 2. High-pressure cleaning device according to claim 1, characterized in that the piston guide (25) has through openings (80) which are penetrated by connecting elements (82) for releasably connecting the clamping bracket (56) to the piston pump (16).
3. Hochdruckreinigungsgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kolbenpumpe (16) ein topfförmiges Pumpengehäuse (17) umfaßt, auf das die Kolbenführung (25) aufgesetzt ist, und daß der Spannbügel (56) mit dem Pumpengehäuse (17) lösbar verbindbar ist.3. High-pressure cleaning device according to claim 1 or 2, characterized in that the piston pump (16) comprises a cup-shaped pump housing (17) on which the piston guide (25) is placed, and that the clamping bracket (56) with the pump housing (17) is detachable is connectable.
4. Hochdruckreinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Kolbenführung ( 25 ) in Längsrichtung der Kolbenpumpe ausgerichtete, dem Pumpenkopf (27) zugewandte metallische Führungshülsen (84; 94) aufweist, an deren freie Enden die Schenkel des Spannbügels (86) anliegen.4. High-pressure cleaning device according to one of the preceding claims, characterized in that the piston guide (25) in the longitudinal direction of the piston pump, the pump head (27) facing metallic guide sleeves (84; 94) has, at the free ends of the legs of the clamping bracket (86) issue.
5. Hochdruckreinigungsgerät nach Anspruch 4, dadurch gekennzeichnet, daß die Verbindungselemente zum lösbaren Verbinden des Spannbügels (86) mit der Kolbenpumpe (16) als Spannschrauben (88) ausgebildet sind, die die Führungshülsen (84) durchgreifen und mit einem korrespondierenden Innengewinde (89) des Pumpengehäuses (17) in Eingriff stehen.5. High-pressure cleaning device according to claim 4, characterized in that the connecting elements for releasably connecting the clamping bracket (86) to the piston pump (16) are designed as clamping screws (88) which pass through the guide sleeves (84) and with a corresponding internal thread (89) of the pump housing (17) are engaged.
6. Hochdruckreinigungsgerät nach Anspruch 4, dadurch gekennzeichnet, daß die Verbindungselemente zum lösbaren Verbinden des Spannbügels (86) mit der Kolbenpumpe (16) als Spannschrauben (96) ausgebildet sind und daß die Führungshülsen (94) ein Innengewinde (95) aufweisen, mit dem die Spannschrauben (96) in Eingriff stehen. 6. High-pressure cleaning device according to claim 4, characterized in that the connecting elements for releasably connecting the clamping bracket (86) to the piston pump (16) are designed as clamping screws (96) and that the guide sleeves (94) have an internal thread (95) with which the tensioning screws (96) are engaged.
7. Hochdruckreinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Spannelement (56; 86) zwei U-förmige Spannbügel (60, 65) aufweist, wobei ein erster Spannbügel (60) den Pumpenkopf in seinem dem Sauganschluß (31) benachbarten unteren Bereich umgreift, während der zweite Spannbügel (65) den Pumpenkopf (27) in seinem dem Sauganschluß (31) abgewandten oberen Bereich umgreift.7. High-pressure cleaning device according to one of the preceding claims, characterized in that the clamping element (56; 86) has two U-shaped clamping brackets (60, 65), a first clamping bracket (60) the pump head in its the suction port (31) adjacent lower Grips area, while the second clamping bracket (65) engages around the pump head (27) in its upper area facing away from the suction connection (31).
8. Hochdruckreinigungsgerät nach Anspruch 7, dadurch gekennzeichnet, daß das Spannelement (56; 86) ein Verbindungsteil (70) umfaßt, das die beiden Spannbügel (60, 65) starr miteinander verbindet.8. High-pressure cleaning device according to claim 7, characterized in that the clamping element (56; 86) comprises a connecting part (70) which rigidly connects the two clamping brackets (60, 65) to one another.
9. Hochdruckreinigungsgerät nach Anspruch 8, dadurch gekennzeichnet, daß das Verbindungsteil (70) den Druckanschluß (33 ) ringförmig umgib .9. High-pressure cleaning device according to claim 8, characterized in that the connecting part (70) surrounds the pressure connection (33) in a ring.
10. Hochdruckreinigungsgerät nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß das Verbindungsteil (70) zwei seitlich, quer zur Längsrichtung der Kolbenpumpe (16) abstehende Laschen (74, 75) aufweist, die am Pumpenkopf (27) anliegen.10. High-pressure cleaning device according to claim 7 or 8, characterized in that the connecting part (70) has two laterally, transversely to the longitudinal direction of the piston pump (16) projecting tabs (74, 75) which abut the pump head (27).
11. Hochdruckreinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Spannelement (56; 86) einstückig ausgebildet ist.11. High-pressure cleaning device according to one of the preceding claims, characterized in that the clamping element (56; 86) is integrally formed.
12. Hochdruckreinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Spannelement (56; 86) aus Metall gefertigt ist. WO-OÖ/37802 PCT/EP99/0783112. High-pressure cleaning device according to one of the preceding claims, characterized in that the clamping element (56; 86) is made of metal. WO-OÖ / 37802 PCT / EP99 / 07831
- 17 -- 17 -
13. Hochdruckreinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Spannelement (56; 86) als Blechteil ausgestaltet ist. 13. High-pressure cleaning device according to one of the preceding claims, characterized in that the clamping element (56; 86) is designed as a sheet metal part.
EP99950746A 1998-12-22 1999-10-15 High-pressure cleaner Expired - Lifetime EP1141550B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19859336A DE19859336C1 (en) 1998-12-22 1998-12-22 High pressure cleaning device
DE19859336 1998-12-22
PCT/EP1999/007831 WO2000037802A1 (en) 1998-12-22 1999-10-15 High-pressure cleaner

Publications (2)

Publication Number Publication Date
EP1141550A1 true EP1141550A1 (en) 2001-10-10
EP1141550B1 EP1141550B1 (en) 2004-10-13

Family

ID=7892168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99950746A Expired - Lifetime EP1141550B1 (en) 1998-12-22 1999-10-15 High-pressure cleaner

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US (1) US6474958B2 (en)
EP (1) EP1141550B1 (en)
JP (1) JP3554280B2 (en)
CN (1) CN1087815C (en)
AT (1) ATE279651T1 (en)
AU (1) AU749654C (en)
BR (1) BR9916499A (en)
CA (1) CA2355741C (en)
DE (2) DE19859336C1 (en)
WO (1) WO2000037802A1 (en)

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Also Published As

Publication number Publication date
WO2000037802A1 (en) 2000-06-29
CN1087815C (en) 2002-07-17
CA2355741A1 (en) 2000-06-29
US6474958B2 (en) 2002-11-05
US20020006340A1 (en) 2002-01-17
AU6340499A (en) 2000-07-12
DE19859336C1 (en) 2000-06-29
CA2355741C (en) 2006-01-31
JP2002533610A (en) 2002-10-08
ATE279651T1 (en) 2004-10-15
BR9916499A (en) 2001-09-04
AU749654C (en) 2003-12-18
CN1331784A (en) 2002-01-16
DE59910863D1 (en) 2004-11-18
AU749654B2 (en) 2002-06-27
EP1141550B1 (en) 2004-10-13
JP3554280B2 (en) 2004-08-18

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