EP2935883A1 - Bent-axis machine - Google Patents

Bent-axis machine

Info

Publication number
EP2935883A1
EP2935883A1 EP13823917.3A EP13823917A EP2935883A1 EP 2935883 A1 EP2935883 A1 EP 2935883A1 EP 13823917 A EP13823917 A EP 13823917A EP 2935883 A1 EP2935883 A1 EP 2935883A1
Authority
EP
European Patent Office
Prior art keywords
maximum
valve plate
drive
piston
max
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
EP13823917.3A
Other languages
German (de)
French (fr)
Other versions
EP2935883B1 (en
Inventor
Josef Erlinger
Harald THUMFART
Robert Finzel
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.)
Wacker Neuson Linz GmbH
Original Assignee
Wacker Neuson Linz GmbH
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 Wacker Neuson Linz GmbH filed Critical Wacker Neuson Linz GmbH
Publication of EP2935883A1 publication Critical patent/EP2935883A1/en
Application granted granted Critical
Publication of EP2935883B1 publication Critical patent/EP2935883B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/328—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the axis of the cylinder barrel relative to the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0639—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F03C1/0642—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined on main shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0678—Control
    • F03C1/0694—Control by changing the inclination of the axis of the cylinder barrel in relation to the axis of the actuated element
    • 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
    • F04B1/20—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 rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2064—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
    • 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
    • F04B1/20—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 rotary cylinder block
    • F04B1/22—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 rotary cylinder block having two or more sets of cylinders or pistons
    • F04B1/24—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 rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis

Definitions

  • the invention relates to a Schrägachsenmaschine comprising a housing with a control cover and a rotatably mounted in the housing on a valve plate piston drum with axial cylinders, each of which cylinder receives a piston, with a drive shaft associated drive flange on which protruding from the cylinders free ends the piston are supported and with a swing cradle comprising adjustment system for adjusting the displacement volume with an actuator, with which the piston drum with the valve plate relative to the drive axis is pivotable about a maximum working range, which is limited by a minimum and a maximum pivot angle, wherein a hydraulic fluid guide via the pivoting cradle through the valve plate.
  • Schrägachsenmaschinen in the context of the invention are hydraulic machines, as axial piston pump for converting mechanical energy, ie torque or speed, in hydraulic energy, ie flow or pressure or axial piston motor for the implementation of hydraulic energy (flow or pressure) into mechanical energy (Torque or speed) are used.
  • Generic bent axis machines are known, for example, from EP 0 728 945 A1 and EP 0 409 084 A2.
  • Angular-axis machines are usually designed such that the collets Bend drum in the control cover (the housing head) with an actuator between a minimum pivot angle of about 0 ° and a maximum pivot angle of up to 32, 33 ° is pivoted, what this area is designed as a pivoting cradle.
  • the supply of the piston pump, namely the intake passage and the pressure passage, are guided over or through said pivoting cradle.
  • the range by which the piston drum between the minimum and maximum swing angle can be pivoted in the housing is structurally limited and is determined in particular by the guided in the pivoting cradle in the control cover control plate (valve plate), which falls below the minimum swing angle or when exceeding the maximum Pivoting angle no longer allows proper supply and removal of hydraulic fluid through the control cover. In particular, exceeding these limits causes leakage of hydraulic fluid from the flow channels between the control cover and valve plate in the housing, whereby the safe operation of the machine would no longer exist.
  • the oblique axis machine does not deliver any volume flow or, in this operating state, this machine has virtually no displacement volume. If the piston drum is pivoted with the piston in the direction of maximum pivoting angle, so the pistons are swung to the side, so the pistons occur during the rotational movement triggered by the inclination of the piston drum on the inner side of the bend deeper into the cylinder and on the outside of the bend out of the cylinder in the direction of the lower Dead center off. During a rotation, the pistons are alternately pulled out of the cylinder or pressed into the cylinder by the connection with the drive flange.
  • the housing is divided into two or more and is the piston barrel comprehensive housing shell relative to the drive shaft receiving housing part pivotally. Precisely this requires a considerable amount of design and monetary effort, which is why lean-axis machines with yoke adjustment for traction drives in the low-price segment can not be used.
  • US 2006/01 10265 A1 discloses a swashplate machine, as used in particular as a pump unit for high pressure cleaners.
  • Said swash plate machine relates only to a purely passively functioning feed pump, in which the delivery pressure automatically adjusts depending on the delivery volume via passive elements, in particular elastomeric elements.
  • the invention has for its object to provide a bent axis machine of the type described, which can provide a significantly increased displacement or delivery volume with low construction costs, without having to resort to a bent axis machine with yoke adjustment.
  • the invention solves this problem in that the minimum pivot angle of the work area is shifted by at least 5 °, preferably by at least 7 °, from its zero position, wherein the maximum pivot angle for maintaining the full working area to the recessed area in the lower area alike by at least 5 °, preferably by at least 7 °, is added.
  • it is thus intended to design a bent axis machine such that the lower region of 0 ° to 5 °, in particular to 7 °, is recessed at all and is not available for use. It has been shown that in practice this area is practically useless in many uses because, especially when used as a hydraulic motor, there is only a poor degree of efficiency in this area.
  • control mirror maximum swing angle is at least 37 °, preferably at least 39 °. This measure according to the invention results in an increase of the maximum absorption volume by a considerable amount, which considerably increases the range of use of such oblique-axis machines, at least for certain areas, for example for traction drives.
  • the guide receiving the control plate naturally has to be configured accordingly "offset.”
  • the theoretical adjustment ranges available for a travel drive can also be fully utilized.
  • Particularly simple construction conditions arise when the one guide for the valve plate (or the control mirror) forming the control cover is placed at an angle of at least 21 ° to the housing, which inclination angle between a Triebwellenachsnormalen and inclined to the piston drum pivot axis contact surfaces between the housing and Housing head is applied. According to the invention, it is thus provided that the housing head, which has already been mounted inclined on the housing, is now placed on the housing in a more inclined manner, the lowermost one
  • the invention also relates to drive for a mobile machine with at least one hydraulic pump and at least one hydraulic motor, wherein at least one of the two hydraulic units as
  • a bent axis machine according to one of claims 1 to 3 is formed.
  • Fig. 1 shows a longitudinal section through a bent axis machine according to the invention.
  • An inclined-axis machine 1 for a traction drive comprises, inter alia, a housing 2, a piston drum 4 rotatably mounted in the housing 2 on a valve plate 3 with axial cylinders 5, of which each cylinder 5 receives a piston 6.
  • a drive shaft 7 associated drive flange 8 is provided, on which the protruding from the cylinders 5 free ends of the piston 6 are supported.
  • the piston drum 4 and the valve plate 3 guided in particular in the control cover 9 is pivotable in the housing 2 for adjusting the displacement volume with an actuator 10 relative to the drive axis T by a maximum working range which is limited by a minimum pivot angle a min and a maximum pivot angle a max .
  • the adjustment system for adjusting the absorption volume with the actuator 10 comprises a pivoting cradle, substantially the valve plate 3 and the associated pivoting guide in the control cover 9. Hydraulic fluid is passed over the pivoting cradle.
  • the minimum pivoting angle (amin) of the working area, while maintaining the full working range, is displaced by at least 5 °, preferably by at least 7 °, from its zero position.
  • the limited by the valve plate 3 maximum pivot angle a max is at least 37 °, preferably at least 39 °.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

The invention relates to a bent-axis machine (1), comprising a housing (2) having a control cover (9) and a piston drum (4) which is rotatably mounted in the housing (2) on a valve plate (3) and which has axial cylinders (5), of which each cylinder (5) receives a piston (6). Said bent-axis machine also comprises a drive flange (8) which is associated with a drive shaft (7) and on which the free ends of the pistons (6) projecting out of the cylinders (5) are supported, and having an adjustment system comprising a pivot cradle for adjusting the displacement volume and having an actuating drive (10), by means of which the piston drum (10) together with the valve plate (3) can be pivoted relative to the drive axis (T) about a maximum working range which is delimited by a minimum pivot angle (αmin) and a maximum pivot angle (αmax). A hydraulic fluid flows over the pivot cradle through the valve plate (3). The invention is characterised in that the minimum pivot angle (αmin) of the working range is shifted out of its zero position by at least 5°, preferably by at least 7°, wherein the maximum pivot angle (αmax) is extended in the same way by at least 5°, preferably by at least 7°, in order to retain the entire working range about the region recessed in the lower region.

Description

Schräqachsenmaschine  Schräqachsenmaschine
Technisches Gebiet Technical area
Die Erfindung betrifft eine Schrägachsenmaschine, die ein Gehäuse mit einem Steuerdeckel und eine im Gehäuse auf einer Ventilplatte drehbar gelagerte Kolbentrommel mit axialen Zylindern umfasst, von denen jeder Zylinder einen Kolben aufnimmt, mit einem einer Triebwelle zugeordneten Triebflansch an dem die aus den Zylindern herausragenden freien Enden der Kolben abgestützt sind und mit einem eine Schwenkwiege umfassenden Verstellsystem zur Verstellung des Schluckvolumens mit einem Stelltrieb, mit dem die Kolbentrommel mit der Ventilplatte gegenüber der Triebachse um einen maximalen Arbeitsbereich verschwenkbar ist, der von einem minimalen und einem maximalen Schwenkwinkel begrenzt ist, wobei eine Hydraulikfluidführung über die Schwenkwiege durch die Ventilplatte erfolgt. The invention relates to a Schrägachsenmaschine comprising a housing with a control cover and a rotatably mounted in the housing on a valve plate piston drum with axial cylinders, each of which cylinder receives a piston, with a drive shaft associated drive flange on which protruding from the cylinders free ends the piston are supported and with a swing cradle comprising adjustment system for adjusting the displacement volume with an actuator, with which the piston drum with the valve plate relative to the drive axis is pivotable about a maximum working range, which is limited by a minimum and a maximum pivot angle, wherein a hydraulic fluid guide via the pivoting cradle through the valve plate.
Stand der Technik State of the art
Schrägachsenmaschinen im Sinne der Erfindung sind hydraulische Maschinen, die als Axialkolbenpumpe zur Umsetzung mechanischer Energie, also von Drehmoment bzw. Drehzahl, in hydraulische Energie, also Volumenstrom bzw. Druck oder als Axialkolbenmotor zur Umsetzung von hydraulischer Energie (Volumenstrom bzw. Druck) in mechanische Energie (Drehmoment bzw. Drehzahl) eingesetzt werden. Gattungsgemäße Schrägachsenmaschinen sind beispielsweise aus der EP 0 728 945 A1 und der EP 0 409 084 A2 bekannt. Schrägachsenmaschinen in the context of the invention are hydraulic machines, as axial piston pump for converting mechanical energy, ie torque or speed, in hydraulic energy, ie flow or pressure or axial piston motor for the implementation of hydraulic energy (flow or pressure) into mechanical energy (Torque or speed) are used. Generic bent axis machines are known, for example, from EP 0 728 945 A1 and EP 0 409 084 A2.
Schrägachsenmaschinen sind üblicherweise derart ausgebildet, dass die Kol- bentrommel im Steuerdeckel (dem Gehäusekopf) mit einem Stelltrieb zwischen einem minimalen Schwenkwinkel von rund 0° und einem Maximalschwenkwinkel von bis zu 32, 33° verschwenkbar ist, wozu dieser Bereich als Schwenkwiege ausgebildet ist. Die Versorgung der Kolbenpumpe, nämlich der Ansaugkanal und der Druckkanal, sind dabei über bzw. durch besagte Schwenkwiege geführt. Der Bereich, um den die Kolbentrommel zwischen minimalem und maximalem Schwenkwinkel im Gehäuse verschwenkt werden kann, ist konstruktiv begrenzt und bestimmt sich insbesondere durch den in der Schwenkwiege im Steuerdeckel geführten Steuerspiegel (Ventilplatte), der beim Unterschreiten des minimalen Schwenkwinkels bzw. beim Überschreiten des maximalen Schwenkwinkels keine ordnungsgemäße Zu- und Abfuhr von Hydraulikflüssigkeit durch den Steuerdeckel mehr erlaubt. Insbesondere bedingt ein Überschreiten dieser Grenzen ein Austreten von Hydraulikflüssigkeit aus den Strömungskanälen zwischen Steuerdeckel und Ventilplatte in das Gehäuse, womit die sichere Funktion der Maschine nicht mehr gegeben wäre. Angular-axis machines are usually designed such that the collets Bend drum in the control cover (the housing head) with an actuator between a minimum pivot angle of about 0 ° and a maximum pivot angle of up to 32, 33 ° is pivoted, what this area is designed as a pivoting cradle. The supply of the piston pump, namely the intake passage and the pressure passage, are guided over or through said pivoting cradle. The range by which the piston drum between the minimum and maximum swing angle can be pivoted in the housing is structurally limited and is determined in particular by the guided in the pivoting cradle in the control cover control plate (valve plate), which falls below the minimum swing angle or when exceeding the maximum Pivoting angle no longer allows proper supply and removal of hydraulic fluid through the control cover. In particular, exceeding these limits causes leakage of hydraulic fluid from the flow channels between the control cover and valve plate in the housing, whereby the safe operation of the machine would no longer exist.
Solange ein Schwenkwinkel von 0° eingestellt ist, also Triebwellenachse und Kolbentrommelachse zusammenfallen, fördert die Schrägachsenmaschine keinen Volumenstrom bzw. besitzt diese Maschine in diesem Betriebszustand praktisch kein Verdrängervolumen. Wird die Kolbentrommel mit den Kolben in Richtung maximalen Schwenkwinkel verschwenkt, werden also die Kolben zur Seite ausgeschwenkt, so treten die Kolben während der Drehbewegung ausgelöst durch die Schrägstellung der Kolbentrommel auf der Knickinnenseite tiefer in die Zylinder und auf der Knickaußenseite aus dem Zylinder in Richtung unterem Totpunkt aus. Bei einer Drehung werden die Kolben durch die Verbindung mit dem Triebflansch abwechselnd aus dem Zylinder herausgezogen bzw. in den Zylinder hineingedrückt. Dadurch entsteht beim Wegziehen der Kolben vom Steuerspiegel ein Unterdruck in den Zylindern, der die Hydraulikflüssigkeit über die Schwenkwiege in den Zylinder einsaugt. Auf der anderen Seite entsteht beim Verlagern der Kolben gegen den Steuerspiegel ein Überdruck, der Hydraulikflüssigkeit aus dem Zylinder über die Schwenkwiege aus dem Hydraulikaggregat austreibt. Derartige Schrägachsmaschinen lassen sich verhältnismäßig kostengünstig in Großserie fertigen. Allerdings ist, wie bereits erwähnt, der maximale Verstellbereich konstruktionsbedingt begrenzt. Ist Einsatzbedingt ein größerer Verstellbereich abzudecken bzw. erforderlich, muss auf Schrägachsmaschinen mit Jochverstellung zurückgegriffen werden, also auf Hydraulikaggregate die einen Verstellbereich von 0° bis 45° zulassen. Bei diesen, konstruktiv sehr aufwendigen und damit auch sehr teuren Maschinen ist das Gehäuse zwei- bzw. mehrgeteilt und ist der die Kolbentrommel umfassende Gehäusemantel gegenüber dem die Triebwelle aufnehmenden Gehäuseteil schwenkbar. Eben dies bedingt einen erheblichen konstruktiven und monetären Mehraufwand, weshalb auf Schrägachsmaschinen mit Jochverstellung für Fahrantriebe im Niedrigpreissegment nicht zurückgegriffen werden kann. As long as a swivel angle of 0 ° is set, ie, drive shaft axis and piston drum axis coincide, the oblique axis machine does not deliver any volume flow or, in this operating state, this machine has virtually no displacement volume. If the piston drum is pivoted with the piston in the direction of maximum pivoting angle, so the pistons are swung to the side, so the pistons occur during the rotational movement triggered by the inclination of the piston drum on the inner side of the bend deeper into the cylinder and on the outside of the bend out of the cylinder in the direction of the lower Dead center off. During a rotation, the pistons are alternately pulled out of the cylinder or pressed into the cylinder by the connection with the drive flange. As a result, when the pistons are pulled away from the control plate, a negative pressure is created in the cylinders, which draws the hydraulic fluid into the cylinder via the pivoting cradle. On the other hand, when displacing the pistons against the control plate, an overpressure is created which expels hydraulic fluid from the cylinder via the pivoting cradle out of the hydraulic unit. Such Schrägeachsmaschinen can be relatively cheaply mass produced. However, as already mentioned, the maximum adjustment range is limited by design. If a larger adjustment range needs to be covered or required due to the application, it must be made use of inclined axis machines with yoke adjustment, ie hydraulic units that allow an adjustment range of 0 ° to 45 °. In these, structurally very expensive and therefore very expensive machines, the housing is divided into two or more and is the piston barrel comprehensive housing shell relative to the drive shaft receiving housing part pivotally. Precisely this requires a considerable amount of design and monetary effort, which is why lean-axis machines with yoke adjustment for traction drives in the low-price segment can not be used.
Die US 2006/01 10265 A1 offenbart eine Schrägscheibenmaschine, wie sie insbesondere als Pumpeneinheit für Hochdruckreiniger verwendet wird. Besagte Schrägscheibenmaschine betrifft lediglich eine rein passiv funktionierende Förderpumpe, bei der sich der Förderdruck in Abhängigkeit des Fördervolumens automatisch über Passivelemente, insbesondere Elastomerelemente, einstellt. US 2006/01 10265 A1 discloses a swashplate machine, as used in particular as a pump unit for high pressure cleaners. Said swash plate machine relates only to a purely passively functioning feed pump, in which the delivery pressure automatically adjusts depending on the delivery volume via passive elements, in particular elastomeric elements.
Darstellung der Erfindung Presentation of the invention
Ausgehend von einem Stand der Technik der vorgeschilderten Art liegt der Erfindung die Aufgabe zugrunde, eine Schrägachsenmaschine der eingangs geschilderten Art zu schaffen, die bei geringem Bauaufwand ein merklich vergrößertes Schluckvolumen bzw. Fördervolumen bereitstellen kann, ohne auf eine Schrägachsenmaschine mit Jocheinstellung zurückgreifen zu müssen. Based on a prior art of the pre-described type, the invention has for its object to provide a bent axis machine of the type described, which can provide a significantly increased displacement or delivery volume with low construction costs, without having to resort to a bent axis machine with yoke adjustment.
Die Erfindung löst diese Aufgabe dadurch, dass der minimale Schwenkwinkel des Arbeitsbereiches um wenigstens 5°, vorzugsweise um wenigstens 7°, aus seiner Nulllage verschoben ist, wobei der der maximale Schwenkwinkel zur Beibehaltung des vollen Arbeitsbereiches um den im unteren Bereich ausgesparten Bereich gleichermaßen um wenigstens 5°, vorzugsweise um wenigstens 7°, ergänzt ist. Erfindungsgemäß ist es somit vorgesehen, eine Schrägachsenmaschine derart auszugestalten, dass der untere Bereich von 0° bis 5°, insbesondere bis 7°, überhaupt ausgespart wird und für eine Nutzung nicht zur Verfügung steht. Es hat sich gezeigt, dass dieser Bereich in der Praxis praktisch bei vielen Verwendungen nicht Sinnvoll nutzbar ist, da, insbesondere bei Verwendung als Hydromotor, in diesem Bereich ein nur mangelhafter Wirkungsgrad vorliegt. Für diverse Einsatzmöglichkeiten, wie beispielsweise in Antriebssträngen von Baumaschinen, diversen anderen hydraulischen Antrieben, od. dgl. ist aber insbesondere auch das maximale Schluckvolumen von Bedeutung, das durch die erfindungsgemäße Verlagerung des gesamten Arbeitsbereiches erhöht werden kann. Mit der Erfindung ist es vorgesehen, den unteren Bereich grundsätzlich nicht zu nutzen, also auszusparen und stattdessen den oberen Bereich um den im unteren Bereich ausgesparten Bereich zu ergänzen. Da die Winkeldifferenz zwischen maximalem und minimalem Schwenkwinkel konstruktionsbedingt beschränkt ist, wird der gesamte Arbeitsbereich erfindungsgemäß„nach oben hin" verschoben, um den vollen Arbeitsbereich bzw. Schwenkbereich uneingeschränkt nutzbar zu machen, womit der im Betrieb effektiv nutzbare maximale Schwenkwinkel gegenüber dem Stand der Technik nicht unerheblich erweitert wird. The invention solves this problem in that the minimum pivot angle of the work area is shifted by at least 5 °, preferably by at least 7 °, from its zero position, wherein the maximum pivot angle for maintaining the full working area to the recessed area in the lower area alike by at least 5 °, preferably by at least 7 °, is added. According to the invention, it is thus intended to design a bent axis machine such that the lower region of 0 ° to 5 °, in particular to 7 °, is recessed at all and is not available for use. It has been shown that in practice this area is practically useless in many uses because, especially when used as a hydraulic motor, there is only a poor degree of efficiency in this area. For various applications, such as in drive trains of construction machinery, various other hydraulic drives, od. Like. But especially the maximum intake volume of importance, which can be increased by the inventive displacement of the entire work area. With the invention, it is intended not to use the lower area in principle, so save and instead to supplement the upper area to the recessed area in the lower area. Since the angular difference between the maximum and minimum pivot angle is limited by design, the entire working area according to the invention "shifted upward" to fully utilize the full work area or swivel range, which is not effective in operation maximum usable swivel angle over the prior art is widened insignificantly.
Der vom Steuerspiegel begrenzte maximale Schwenkwinkel beträgt wenigstens 37°, vorzugsweise wenigstens 39°. Durch diese erfindungsgemäße Maßnahme ergibt sich eine Zunahme des maximalen Schluckvolumens um einen erheblichen Betrag, was das Einsatzspektrum derartiger Schrägachsmaschinen zumindest für gewisse Bereiche, beispielsweise für Fahrantriebe, erheblich vergrößert. The limited by the control mirror maximum swing angle is at least 37 °, preferably at least 39 °. This measure according to the invention results in an increase of the maximum absorption volume by a considerable amount, which considerably increases the range of use of such oblique-axis machines, at least for certain areas, for example for traction drives.
Um die Erfindung in der Praxis an Schrägachsenmaschinen umsetzen zu können, muss naturgemäß die den Steuerspiegel aufnehmende Führung entsprechend„versetzt" ausgestaltet sein. Somit lassen sich die für einen Fahrantrieb zur Verfügung stehenden theoretischen Stellbereiche im Gegensatz zum Stand der Technik auch voll nutzen. Besonders einfache Konstruktionsverhältnisse ergeben sich, wenn der eine Führung für die Ventilplatte (bzw. den Steuerspiegel) ausbildende Steuerdeckel um einen Neigungswinkel von wenigstens 21 ° auf das Gehäuse aufgesetzt ist, welcher Neigungswinkel zwischen einer Triebwellenachsnormalen und die um die Kolbentrommel Schwenkachse geneigten Kontaktflächen zwischen Gehäuse und Gehäusekopf anliegt. Erfindungsgemäß ist es somit vorgesehen, den auch bisher bereits geneigt auf dem Gehäuse aufgesetzten Gehäusekopf nunmehr stärker geneigt auf das Gehäuse aufzusetzen, den untersten In order to be able to implement the invention in practice on oblique-axis machines, the guide receiving the control plate naturally has to be configured accordingly "offset." Thus, in contrast to the prior art, the theoretical adjustment ranges available for a travel drive can also be fully utilized. Particularly simple construction conditions arise when the one guide for the valve plate (or the control mirror) forming the control cover is placed at an angle of at least 21 ° to the housing, which inclination angle between a Triebwellenachsnormalen and inclined to the piston drum pivot axis contact surfaces between the housing and Housing head is applied. According to the invention, it is thus provided that the housing head, which has already been mounted inclined on the housing, is now placed on the housing in a more inclined manner, the lowermost one
Schwenkwinkelbereich auszusparen und an den obersten Schwenkwinkelbereich anzuhängen. Eine Steuerdeckelanschlussflächennormale des Steuerdeckels ist dabei gegenüber der Triebwellenachse um einen Neigungswinkel geneigt, welcher der halbe Summe von maximalem und minimalem Schwenkwinkel (ß = (amax + amin) / 2) entspricht, wobei ß größergleich 21 ° ist. Save swing angle range and attach to the top swing angle range. A Steuerdeckelanschlussflächennormale the control cover is inclined relative to the drive shaft axis by an inclination angle, which corresponds to half the sum of maximum and minimum swing angle (ß = (a max + a m in) / 2), where ß is equal to 21 °.
Die Erfindung betrifft darüber hinaus auch Fahrantrieb für eine mobile Arbeitsmaschine mit wenigstens einer Hydropumpe und mit wenigstens einem Hydromotor, wobei wenigstens eines der beiden Hydraulikaggregate als The invention also relates to drive for a mobile machine with at least one hydraulic pump and at least one hydraulic motor, wherein at least one of the two hydraulic units as
Schrägachsenmaschine nach einem der Ansprüche 1 bis 3 ausgebildet ist. A bent axis machine according to one of claims 1 to 3 is formed.
Kurze Beschreibung der Zeichnung Short description of the drawing
In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispiels schematisch dargestellt. In the drawing, the invention is illustrated schematically with reference to an embodiment.
Fig. 1 zeigt einen Längsschnitt durch eine erfindungsgemäße Schrägachsenmaschine. Fig. 1 shows a longitudinal section through a bent axis machine according to the invention.
Weg zur Ausführung der Erfindung Way to carry out the invention
Eine Schrägachsenmaschine 1 für einen Fahrantrieb gemäß der Erfindung um- fasst unter anderem ein Gehäuse 2, eine im Gehäuse 2 auf einer Ventilplatte 3 drehbar gelagerte Kolbentrommel 4 mit axialen Zylindern 5, von denen jeder Zylinder 5 einen Kolben 6 aufnimmt. Zudem ist ein einer Triebwelle 7 zugeordneter Triebflansch 8 vorgesehen, an dem die aus den Zylindern 5 herausragenden freien Enden der Kolben 6 abgestützt sind. Die Kolbentrommel 4 und die insbesondere im Steuerdeckel 9 geführte Ventilplatte 3 ist im Gehäuse 2 zur Verstellung des Schluckvolumens mit einem Stelltrieb 10 gegenüber der Triebachse T um einen maximalen Arbeitsbereich verschwenkbar, der von einem minimalen Schwenkwinkel amin und einem maximalen Schwenkwinkel amax begrenzt ist. Das Verstellsystem zur Verstellung des Schluckvolumens mit dem Stelltrieb 10 umfasst eine Schwenkwiege, im Wesentlichen die Ventilplatte 3 und die zugeordnete Schwenkführung im Steuerdeckel 9. Hydraulikfluid wird über die Schwenkwiege geführt. An inclined-axis machine 1 for a traction drive according to the invention comprises, inter alia, a housing 2, a piston drum 4 rotatably mounted in the housing 2 on a valve plate 3 with axial cylinders 5, of which each cylinder 5 receives a piston 6. In addition, a drive shaft 7 associated drive flange 8 is provided, on which the protruding from the cylinders 5 free ends of the piston 6 are supported. The piston drum 4 and the valve plate 3 guided in particular in the control cover 9 is pivotable in the housing 2 for adjusting the displacement volume with an actuator 10 relative to the drive axis T by a maximum working range which is limited by a minimum pivot angle a min and a maximum pivot angle a max . The adjustment system for adjusting the absorption volume with the actuator 10 comprises a pivoting cradle, substantially the valve plate 3 and the associated pivoting guide in the control cover 9. Hydraulic fluid is passed over the pivoting cradle.
Erfindungsgemäß ist der minimale Schwenkwinkel (amin) des Arbeitsbereiches unter Beibehaltung des vollen Arbeitsbereiches um wenigstens 5°, vorzugsweise um wenigstens 7° aus seiner Nulllage verschoben. Der von der Ventilplatte 3 begrenzte maximale Schwenkwinkel amax beträgt wenigstens 37°, vorzugsweise wenigstens 39°. According to the invention, the minimum pivoting angle (amin) of the working area, while maintaining the full working range, is displaced by at least 5 °, preferably by at least 7 °, from its zero position. The limited by the valve plate 3 maximum pivot angle a max is at least 37 °, preferably at least 39 °.
Konstruktiv ist die Erfindung gemäß dem Ausführungsbeispiel dadurch gelöst, dass eine Steuerdeckelanschlussflächennormale K des Steuerdeckels 9 gegenüber der Triebwellenachse T um einen Neigungswinkel ß geneigt ist, welcher der halbe Summe von maximalem und minimalem Schwenkwinkel, ß = (amax + amin) / 2, entspricht, wobei ß größer gleich 21 ° ist. The invention according to the embodiment is achieved in that a Steuerdeckelanschlussflächennormale K of the control cover 9 is inclined relative to the drive shaft axis T by an inclination ß, which half the sum of maximum and minimum pivot angle, ß = (a max + a m in) / 2 , corresponds, where ß is greater than 21 °.
Der untere Bereich von 0° bis 5°, insbesondere bis 7°, steht für eine Nutzung nicht mehr zur Verfügung. Der gesamte maximal zur Verfügung stehende Arbeitsbereich wird„nach oben hin" verschoben, um den vollen Arbeitsbereich bzw. Schwenkbereich uneingeschränkt nutzbar zu machen. The lower range of 0 ° to 5 °, especially up to 7 °, is no longer available for use. The entire maximum available work area is moved "upwards" to make full use of the full work area or swivel range.

Claims

Patentansprüche claims
1 . Schrägachsenmaschine (1 ), die ein Gehäuse (2) mit einem Steuerdeckel (9) und eine im Gehäuse (2) auf einer Ventilplatte (3) drehbar gelagerte Kolbentrommel (4) mit axialen Zylindern (5) umfasst, von denen jeder Zylinder (5) einen Kolben (6) aufnimmt, mit einem einer Triebwelle (7) zugeordneten Triebflansch (8) an dem die aus den Zylindern (5) herausragenden freien Enden der Kolben (6) abgestützt sind und mit einem eine Schwenkwiege umfassenden Verstellsystem zur Verstellung des Schluckvolumens mit einem Stelltrieb (10), mit dem die Kolbentrommel (4) mit der Ventilplatte (3) gegenüber der Triebachse (T) um einen maximalen Arbeitsbereich verschwenkbar ist, der von einem minimalen Schwenkwinkel (amin) und einem maximalen Schwenkwinkel (amax) begrenzt ist, wobei eine Hydraulikfluidführung über die Schwenkwiege durch die Ventilplatte (3) erfolgt, dadurch gekennzeichnet, dass der minimale 1 . Angled-axis machine (1) comprising a housing (2) with a control cover (9) and a piston drum (4) with axial cylinders (5) rotatably mounted in the housing (2) on a valve plate (3), each cylinder (5) being axially displaceable ) receives a piston (6), with one of a drive shaft (7) associated drive flange (8) on which from the cylinders (5) protruding free ends of the piston (6) are supported and with a swing cradle comprising adjustment system for adjusting the absorption volume with an actuating drive (10) with which the piston drum (4) with the valve plate (3) can be pivoted with respect to the drive axis (T) by a maximum working range which is determined by a minimum pivot angle (a min ) and a maximum pivot angle (a max ) is limited, wherein a hydraulic fluid guide via the pivoting cradle through the valve plate (3), characterized in that the minimum
Schwenkwinkel (amin) des Arbeitsbereiches um wenigstens 5°, vorzugsweise um wenigstens 7°, aus seiner Nulllage verschoben ist, wobei der der maximale Schwenkwinkel (amax) zur Beibehaltung des vollen Arbeitsbereiches um den im unteren Bereich ausgesparten Bereich gleichermaßen um wenigstens 5°, vorzugsweise um wenigstens 7°, ergänzt ist. Swivel angle (a min ) of the work area is shifted by at least 5 °, preferably by at least 7 °, from its zero position, wherein the maximum swivel angle (a max ) for maintaining the full working area by the recessed area in the lower area equally by at least 5 ° , preferably at least 7 °, is added.
2. Schrägachsenmaschine (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass der, insbesondere von der Ventilplatte (3) begrenzte, maximale 2. Schrägachsenmaschine (1) according to claim 1, characterized in that, in particular of the valve plate (3) limited, maximum
Schwenkwinkel (amax) wenigstens 37°, vorzugsweise wenigstens 39° beträgt. Swivel angle (a max ) at least 37 °, preferably at least 39 °.
3. Schrägachsenmaschine (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass eine Steuerdeckelanschlussflächennormale (K) des Steuerdeckels (9) gegenüber der Triebwellenachse (T) um einen Neigungswinkel (ß) geneigt ist, welcher der halbe Summe von maximalem und minimalem Schwenkwinkel, ß = (amax + amin) / 2, entspricht, wobei ß größer gleich 21 ° ist. 3. Oblique-axis machine (1) according to claim 1, characterized in that a Steuerdeckelanschlussflächennormale (K) of the control cover (9) relative to the drive shaft axis (T) by an inclination angle (ß) is inclined, which half the sum of maximum and minimum pivot angle, ß = (a max + a min ) / 2, where β is greater than or equal to 21 °.
4. Fahrantrieb für eine mobile Arbeitsmaschine mit wenigstens einer Hyd- ropumpe und mit wenigstens einem Hydromotor, wobei wenigstens eines der beiden Hydraulikaggregate als Schrägachsenmaschine (1 ) nach einem der Ansprüche 1 bis 3 ausgebildet ist. 4. Travel drive for a mobile work machine with at least one hydraulic pump and with at least one hydraulic motor, wherein at least one of the two hydraulic units is designed as a bent axis machine (1) according to one of claims 1 to 3.
EP13823917.3A 2012-12-18 2013-12-17 Axial piston machine of the slant axis type Active EP2935883B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50597/2012A AT513773B1 (en) 2012-12-18 2012-12-18 Travel drive for a mobile work machine
PCT/AT2013/050254 WO2014094024A1 (en) 2012-12-18 2013-12-17 Bent-axis machine

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EP2935883A1 true EP2935883A1 (en) 2015-10-28
EP2935883B1 EP2935883B1 (en) 2017-03-01

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US (1) US10151305B2 (en)
EP (1) EP2935883B1 (en)
CN (1) CN204900172U (en)
AT (1) AT513773B1 (en)
WO (1) WO2014094024A1 (en)

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EP3591224A1 (en) * 2018-07-05 2020-01-08 Dana Motion Systems Italia S.R.L. Piston hydraulic device
CN112459981A (en) * 2020-11-29 2021-03-09 江苏可奈力机械制造有限公司 Slide inclined shaft variable high-pressure plunger pump

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Publication number Publication date
CN204900172U (en) 2015-12-23
EP2935883B1 (en) 2017-03-01
WO2014094024A1 (en) 2014-06-26
US20150345483A1 (en) 2015-12-03
AT513773B1 (en) 2015-03-15
US10151305B2 (en) 2018-12-11
AT513773A1 (en) 2014-07-15

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