EP0305785A2 - Hydraulic motor - Google Patents

Hydraulic motor Download PDF

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Publication number
EP0305785A2
EP0305785A2 EP88113080A EP88113080A EP0305785A2 EP 0305785 A2 EP0305785 A2 EP 0305785A2 EP 88113080 A EP88113080 A EP 88113080A EP 88113080 A EP88113080 A EP 88113080A EP 0305785 A2 EP0305785 A2 EP 0305785A2
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EP
European Patent Office
Prior art keywords
shaft
housing
annular
toothing
face
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
EP88113080A
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German (de)
French (fr)
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EP0305785A3 (en
EP0305785B1 (en
Inventor
Rudolf Dipl.-Ing. Fh Kollmuss
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.)
Kinshofer GmbH
Original Assignee
Kinshofer Greiftechnik 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.)
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Publication date
Application filed by Kinshofer Greiftechnik GmbH filed Critical Kinshofer Greiftechnik GmbH
Priority to AT88113080T priority Critical patent/ATE72598T1/en
Publication of EP0305785A2 publication Critical patent/EP0305785A2/en
Publication of EP0305785A3 publication Critical patent/EP0305785A3/en
Application granted granted Critical
Publication of EP0305785B1 publication Critical patent/EP0305785B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump

Definitions

  • the invention relates to a hydraulic motor with a cylindrical housing and a shaft mounted therein with a flange-shaped widened end part, preferably hydraulic internally toothed gear machine with a toothed shaft and an annular piston provided with internal and external toothing, the displacement chambers with the internal toothing of the housing or the toothing of the shaft forms and opens and closes inlet and outlet control openings due to its wobbling movement.
  • Hydraulic internally toothed gear machines of this type are known for example from DE-OS 33 42 131 and the unpublished DE-OS 36 17 313.
  • rotary motors are normally connected to the connecting piece in an oscillating manner, so that the output shaft of the rotary motor carrying the gripper is essentially only stressed in the axial direction by the weight of the gripper and the load taken up.
  • the output shafts of the rotary motors are usually due to inclined roller bearings or other axial forces receiving bearings mounted in the rotary motor housing, so that forces acting on the output shaft in the axial direction can be absorbed without problems.
  • the connection piece carrying the gripper via the rotary motor is pivoted about a horizontal axis in order to expand the working area of the gripper.
  • Inadmissibly high bending moments can, for example, act on the shaft of the hydraulic motor when the lifting device, for example an excavator or the like. via its boom or dipper stick, on which the gripper is supported.
  • the bending moments acting on the motor shaft can become so large that they are permanently deformed and the motor is destroyed.
  • the object of the invention is therefore to provide a hydraulic motor of the type specified at the outset, in which bending moments of impermissible magnitude acting on its output shaft, which are generated, for example, by transverse forces acting on the gripper connected to it, can be avoided.
  • this object is achieved in a hydraulic motor of the generic type in that the housing has an annular flat end face which forms a gap with an annular surface of the flange-shaped widened end part of the shaft, the width of which is only so large that one on the Bending moment acting on the shaft supports the end face on the end part by bending the shaft only in its elastic area.
  • the motor shaft or the output shaft of the motor is protected in a simple manner against inadmissibly high bending moments, which could lead to permanent deformation of the shaft, in that the housing is supported with its annular edge on the flange-shaped widened end part of the shaft .
  • the parts that support each other in the event of overload have a relatively large diameter, so that even high transverse forces can be recorded non-destructively.
  • the motor can usually be blocked due to the frictional forces that occur.
  • the housing is made of cast iron and the flange-shaped widened end part of the shaft made of steel, so that good sliding properties exist between the two parts, which under certain circumstances allow the shaft to spin even when its widened end part is supported on the housing edge. If it is still desirable to turn the shaft even with high transverse forces, it is advisable to provide the end face of the housing edge with an annular groove into which a ring made of bearing metal is inserted.
  • a shaft 2 is supported in the bell-shaped housing 1 one end by a sliding bearing 3 and other ends by an oblique roller rolling bearing 4.
  • the shaft 2 is provided in one piece at its lower end with a flange 5 widened.
  • the bell-shaped housing 1 has at its upper closed end an extension 6 with a transverse bore 7, which is used to attach the housing of the rotary motor to a Outrigger, a dipper stick or the like. of a hoist.
  • the transverse bore 7 forms a bearing bore which is mounted on a corresponding bearing pin of the hoist.
  • a gripper or other tool can be fastened to the flange-widened end part 5 of the shaft 3 in a known manner.
  • the housing 1 is provided at its lower end with a screwed-in housing ring 8 which serves to support the shaft 2 and which has an annular web-like extension 9 with a lower flat end face 10.
  • This end face 10 forms an annular gap with an annular surface 11, parallel to this, of the flange-widened end part 5.
  • the gap has a width of approximately 0.2 mm.
  • the shaft 12 is supported in the two-part bell-like housing 13 by two inclined roller rolling bearings 14, 15. At its lower end, the shaft 12 in turn has a flange-widened end part 15.
  • the lower housing part 13 is provided with a lower annular end face 16, which is provided with a circumferential annular groove 17, into which a ring 18 of bearing metal with a rectangular cross section is inserted.
  • the flange-widened end part is provided below the bearing ring 18 with an annular bead-like elevation 19 with an upper, flat, annular surface. Between the lower plane surface of the bearing ring 18 and the surface of the annular bead 19 there is again a gap of approximately 0.2 mm.
  • the two hydraulic ring piston motors shown in longitudinal section in the figures are of the type described in DE-OS 33 42 131, so that reference can be made to them.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

A hydraulic motor with a cylindrical housing and supported in this a shaft with widened, flange-shaped end section, preferably a hydraulic internally toothed gear machine, has a toothed shaft and an annular piston provided with inside and outside toothing, which, together with the inside toothing of the housing or the toothing of the shaft forms displacement chambers and by virtue of its tumbling movement opens and closes inlet and outlet control apertures. In order to avoid bending moments of inadmissible magnitude acting on the drive shaft, which are produced, for example, by transverse forces acting on grippers connected to this, the housing (13) or an annular housing section has an annular plane end face which together with an annular surface (19) of the expanded, flange-shaped end section (15) of the shaft (12) forms a gap, the width of which is only so great that, in the event of a bending moment acting on the shaft (12), the end face is supported on the end section (15) with deflection of the shaft only in its flexible range. <IMAGE>

Description

Die Erfindung betrifft einen Hydromotor mit einem zylindrischen Gehäuse und einer in diesem gelagerten Welle mit flanschförmig verbreitertem Endteil, vorzugsweise hydraulische innenverzahnte Zahnradmaschine mit einer verzahnten Welle und einem mit Innen- und Außenverzahnungen versehenen Ringkolben, der mit der Innenverzahnung des Gehäuses oder der Verzahnung der Welle Verdrängungskammern bildet und aufgrund seiner taumelnden Bewegung Einlaß- und Auslaßsteueröffnungen auf- und zusteuert.The invention relates to a hydraulic motor with a cylindrical housing and a shaft mounted therein with a flange-shaped widened end part, preferably hydraulic internally toothed gear machine with a toothed shaft and an annular piston provided with internal and external toothing, the displacement chambers with the internal toothing of the housing or the toothing of the shaft forms and opens and closes inlet and outlet control openings due to its wobbling movement.

Hydraulische innenverzahnte Zahnradmaschinen dieser Art sind beispielsweise aus der DE-OS 33 42 131 sowie der nicht vorveröffentlichten DE-OS 36 17 313 bekannt.Hydraulic internally toothed gear machines of this type are known for example from DE-OS 33 42 131 and the unpublished DE-OS 36 17 313.

Üblicherweise werden Greifer unterschiedlicher Art über hydraulische Drehmotore mit den Anschlußstücken von Hebezeugen verbunden, so daß die Greifer in die gewünschte Lage gedreht werden können. Dabei sind die Drehmotore normalerweise pendelnd mit dem Anschlußstück verbunden, so daß die den Greifer tragende Abtriebswelle des Drehmotors im wesentlichen nur in axialer Richtung durch das Gewicht des Greifers und der aufgenommenen Last beansprucht wird. Die Abtriebswellen der Drehmotore sind üblicherweise durch Schrägrollenlager oder andere Axialkräfte aufnehmende Lager in dem Drehmotorgehäuse gelagert, so daß in axialer Richtung auf die Abtriebswelle wirkende Kräfte problem­los aufgenommen werden können. Es gibt jedoch auch Anwendungs­fälle, in denen das den Greifer über den Drehmotor tragende Anschlußstück um eine horizontale Achse geschwenkt wird, um den Arbeitsbereich des Greifers zu erweitern. Unzulässig hohe Biegemomente können beispielsweise dann auf die Welle des Hydromotors wirken, wenn sich das Hebezeug, beispielsweise ein Bagger o.dgl. über seinen Ausleger oder Löffelstiel, auf dem Greifer abstützt. In derartigen Fällen können die auf die Motorwelle wirkenden Biegemomente so groß werden, daß diese bleibend verformt und dadurch der Motor zerstört wird.Usually, different types of grippers are connected to the connecting pieces of lifting devices via hydraulic rotary motors, so that the grippers can be rotated into the desired position. The rotary motors are normally connected to the connecting piece in an oscillating manner, so that the output shaft of the rotary motor carrying the gripper is essentially only stressed in the axial direction by the weight of the gripper and the load taken up. The output shafts of the rotary motors are usually due to inclined roller bearings or other axial forces receiving bearings mounted in the rotary motor housing, so that forces acting on the output shaft in the axial direction can be absorbed without problems. However, there are also applications in which the connection piece carrying the gripper via the rotary motor is pivoted about a horizontal axis in order to expand the working area of the gripper. Inadmissibly high bending moments can, for example, act on the shaft of the hydraulic motor when the lifting device, for example an excavator or the like. via its boom or dipper stick, on which the gripper is supported. In such cases, the bending moments acting on the motor shaft can become so large that they are permanently deformed and the motor is destroyed.

Aufgabe der Erfindung ist es daher, einen Hydromotor der eingangs angegebenen Art zu schaffen, bei dem sich auf dessen Abtriebswelle wirkende Biegemomente unzulässiger Größe, die beispielsweise durch auf mit dieser verbundene Greifer wirkende Querkräfte erzeugt werden, vermeiden lassen.The object of the invention is therefore to provide a hydraulic motor of the type specified at the outset, in which bending moments of impermissible magnitude acting on its output shaft, which are generated, for example, by transverse forces acting on the gripper connected to it, can be avoided.

Erfindungsgemäß wird diese Aufgabe bei eine Hydromotor der gattungsgemäßen Art dadurch gelöst, daß das Gehäuse eine ringförmige ebene Stirnfläche aufweist, die mit einer ringförmigen Fläche des flanschförmig verbreiterten Endteils der Welle einen Spalt bildet, dessen Breite nur so groß ist, daß sich bei einem auf die Welle wirkenden Biegemoment die Stirn­fläche auf dem Endteil unter Durchbiegung der Welle nur in derem elastischen Bereich abstützt. Bei dem erfindungsgemäßen Hydromotor ist die Motorwelle bzw. die Abtriebswelle des Motors in einfacher Weise dadurch gegen unzulässig hohe Biegemomente, die zu einer bleibenden Verformung der Welle führen könnten, geschützt, daß sich das Gehäuse mit seinem ringförmigen Rand auf das flanschförmig verbreiterte Endteil der Welle abstützt. Die sich bei Überlast aufeinander abstützenden Teile weisen verhält­nismäßig große Durchmesser auf, so daß selbst hohe Querkräfte zerstörungsfrei aufgenommen werden können.According to the invention, this object is achieved in a hydraulic motor of the generic type in that the housing has an annular flat end face which forms a gap with an annular surface of the flange-shaped widened end part of the shaft, the width of which is only so large that one on the Bending moment acting on the shaft supports the end face on the end part by bending the shaft only in its elastic area. In the hydraulic motor according to the invention, the motor shaft or the output shaft of the motor is protected in a simple manner against inadmissibly high bending moments, which could lead to permanent deformation of the shaft, in that the housing is supported with its annular edge on the flange-shaped widened end part of the shaft . The parts that support each other in the event of overload have a relatively large diameter, so that even high transverse forces can be recorded non-destructively.

Treten Querkräfte auf, die zu einer Abstützung des Gehäuserandes auf dem flanschförmig verbreiterten Endteil der Welle führen, kann in der Regel ein Blockieren des Motors wegen der auftre­tenden Reibungskräfte in Kauf genommen werden. Üblicherweise besteht jedoch das Gehäuse aus Gußeisen und der flanschförmig verbreiterte Endteil der Welle aus Stahl, so daß zwischen beiden Teilen gute Gleiteigenschaften bestehen, die unter Umständen ein Durchdrehen der Welle auch dann ermöglichen, wenn sich deren verbreitertes Endteil auf dem Gehäuserand abstützt. Ist ein Durchdrehen der Welle selbst bei hohen Querkräften noch erwünscht, ist es zweckmäßig, die Stirnfläche des Gehäuserandes mit einer Ringnut zu versehen, in die ein Ring aus Lagermetall eingelegt ist.If transverse forces occur that support the edge of the housing on the flange-widened end part of the shaft, the motor can usually be blocked due to the frictional forces that occur. Usually, however, the housing is made of cast iron and the flange-shaped widened end part of the shaft made of steel, so that good sliding properties exist between the two parts, which under certain circumstances allow the shaft to spin even when its widened end part is supported on the housing edge. If it is still desirable to turn the shaft even with high transverse forces, it is advisable to provide the end face of the housing edge with an annular groove into which a ring made of bearing metal is inserted.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

  • Fig.1 einen Längsschnitt durch eine erste Ausführungsform und
  • Fig.2 einen Längsschnitt durch eine zweite Ausführungsform eines Zahnringmotors.
An embodiment of the invention is explained below with reference to the drawing. In this shows
  • 1 shows a longitudinal section through a first embodiment and
  • 2 shows a longitudinal section through a second embodiment of a toothed ring motor.

Bei dem Ausführungsbeispiel nach Fig.1 ist in dem glocken­förmigen Gehäuse 1 eine Welle 2 einen Ends durch eine Gleitlagerung 3 und anderen Ends durch ein Schrägrollen-­Wälzlager 4 gelagert. Die Welle 2 ist an ihrem unteren Ende einstückig mit einem flanschförmig verbreitertem Teil 5 versehen. Das glockenförmige Gehäuse 1 weist an seinem oberen geschlossenen Ende einen Fortsatz 6 mit einer Querbohrung 7 auf, die zum Anhängen des Gehäuses des Drehmotors an einem Ausleger, einem Löffelstiel o.dgl. eines Hebezeuges dient. Dabei bildet die Querbohrung 7 eine Lagerbohrung, die auf einem entsprechenden Lagerbolzen des Hebezeuges gelagert ist.In the exemplary embodiment according to FIG. 1, a shaft 2 is supported in the bell-shaped housing 1 one end by a sliding bearing 3 and other ends by an oblique roller rolling bearing 4. The shaft 2 is provided in one piece at its lower end with a flange 5 widened. The bell-shaped housing 1 has at its upper closed end an extension 6 with a transverse bore 7, which is used to attach the housing of the rotary motor to a Outrigger, a dipper stick or the like. of a hoist. The transverse bore 7 forms a bearing bore which is mounted on a corresponding bearing pin of the hoist.

An dem flanschförmig verbreiterten Endteil 5 der Welle 3 läßt sich in bekannter Weise ein Greifer oder ein anderes Werkzeug befestigen.A gripper or other tool can be fastened to the flange-widened end part 5 of the shaft 3 in a known manner.

Das Gehäuse 1 ist an seinem unteren Ende mit einem einge­schraubten der Lagerung der Welle 2 dienenden Gehäusering 8 versehen, der einen ringstegartigen Fortsatz 9 mit unterer ebener Stirnfläche 10 aufweist. Diese Stirnfläche 10 bildet einen ringförmigen Spalt mit einer zu dieser parallelen ringförmigen Fläche 11 des flanschförmig verbreiterten Endteils 5. Der Spalt weist in dem dargestellten Ausführungsbeispiel eine Breite von etwa 0,2 mm auf.The housing 1 is provided at its lower end with a screwed-in housing ring 8 which serves to support the shaft 2 and which has an annular web-like extension 9 with a lower flat end face 10. This end face 10 forms an annular gap with an annular surface 11, parallel to this, of the flange-widened end part 5. In the exemplary embodiment shown, the gap has a width of approximately 0.2 mm.

Bei dem Ausführungsbeispiel nach Fig.2 ist die Welle 12 in dem zweiteiligen glockenartigen Gehäuse 13 durch zwei Schrägrollen-­Wälzlager 14,15 gelagert. Die Welle 12 weist an ihrem unteren Ende wiederum ein flanschförmig verbreitertes Endteil 15 auf. Der untere Gehäuseteil 13 ist mit einer unteren ringförmigen Stirnfläche 16 versehen, die mit einer umlaufenden Ringnut 17 versehen ist, in die ein im Querschnitt rechteckiger Ring 18 aus Lagermetall eingelegt ist. Das flanschförmig verbreiterte Endteil ist unterhalb des Lagerringes 18 mit einer ringförmigen wulstartigen Erhebung 19 mit oberer ebener ringförmiger Fläche versehen. Zwischen der unteren Ebenen Fläche des Lagerringes 18 und der Fläche des ringförmige Wulstes 19 ist wiederum ein Spalt von etwa 0,2 mm vorhanden.In the exemplary embodiment according to FIG. 2, the shaft 12 is supported in the two-part bell-like housing 13 by two inclined roller rolling bearings 14, 15. At its lower end, the shaft 12 in turn has a flange-widened end part 15. The lower housing part 13 is provided with a lower annular end face 16, which is provided with a circumferential annular groove 17, into which a ring 18 of bearing metal with a rectangular cross section is inserted. The flange-widened end part is provided below the bearing ring 18 with an annular bead-like elevation 19 with an upper, flat, annular surface. Between the lower plane surface of the bearing ring 18 and the surface of the annular bead 19 there is again a gap of approximately 0.2 mm.

Die beiden in den Figuren im Längsschnitt dargestellten hydraulischen Ringkolbenmotoren sind von der in der DE-OS 33 42 131 beschriebenen Art, so daß auf diese verwiesen werden kann.The two hydraulic ring piston motors shown in longitudinal section in the figures are of the type described in DE-OS 33 42 131, so that reference can be made to them.

Claims (2)

1. Hydromotor mit einem zylindrischen Gehäuse und einer in diesem gelagerten Welle mit flanschförmig verbreitertem Endteil, vorzugsweise hydraulische innenverzahnte Zahnradmaschine mit einer verzahnten Welle und einem mit Innen- und Außenverzahnungen versehenen Ringkolben, der mit der Innenverzahnung des Gehäuses oder der Verzahnung der Welle Verdrängungskammern bildet und aufgrund seiner taumelnden Bewegung Einlaß- und Auslaßsteueröffnungen auf- und zusteuert, dadurch gekennzeichnet,
daß das Gehäuse (1,13) oder ein ringförmiges Gehäuseteil (8) eine ringförmige ebene Stirnfläche (10) aufweist, die mit einer ringförmigen Fläche (11,19) des flanschförmig verbreiterten Endteils (5,15) der Welle (2,12) einen Spalt bildet, dessen Breite nur so groß ist, daß sich bei einem auf die Welle (2,12) wirkenden Biegemoment die Stirnfläche auf dem Endteil (5,15) unter Durchbiegung der Welle nur in derem elastischen Bereich abstützt.1.Hydromotor with a cylindrical housing and a shaft mounted in it with a flange-shaped widened end part, preferably hydraulic internally toothed gear machine with a toothed shaft and an annular piston provided with internal and external toothing, which forms displacement chambers with the internal toothing of the housing or the toothing of the shaft and due to its wobbling movement opens and closes inlet and outlet control openings, characterized in that
that the housing (1,13) or an annular housing part (8) has an annular flat end face (10) which with an annular surface (11,19) of the flange-widened end part (5,15) of the shaft (2,12) forms a gap, the width of which is only so large that when a bending moment acts on the shaft (2, 12) the end face is supported on the end part (5, 15) by bending the shaft only in its elastic region. 2. Hydromotor nach Anspruch 1, dadurch gekennzeichnet, daß die Stirnfläche (16) mit einer Ringnut (17) versehen ist, in die ein Ring (18) aus Lagermetall eingelegt ist.2. Hydraulic motor according to claim 1, characterized in that the end face (16) is provided with an annular groove (17) into which a ring (18) made of bearing metal is inserted.
EP88113080A 1987-08-31 1988-08-11 Hydraulic motor Expired - Lifetime EP0305785B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88113080T ATE72598T1 (en) 1987-08-31 1988-08-11 HYDROMOTOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3729049 1987-08-31
DE3729049A DE3729049C1 (en) 1987-08-31 1987-08-31 Hydraulic motor

Publications (3)

Publication Number Publication Date
EP0305785A2 true EP0305785A2 (en) 1989-03-08
EP0305785A3 EP0305785A3 (en) 1989-09-13
EP0305785B1 EP0305785B1 (en) 1992-02-12

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ID=6334886

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EP88113080A Expired - Lifetime EP0305785B1 (en) 1987-08-31 1988-08-11 Hydraulic motor

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EP (1) EP0305785B1 (en)
AT (1) ATE72598T1 (en)
DE (1) DE3729049C1 (en)
ES (1) ES2028961T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999008000A1 (en) * 1997-08-12 1999-02-18 Andreas Voulgaris Hydraulic unit with fastening device for additional aggregate units
CN115289087A (en) * 2022-09-28 2022-11-04 宁波中意液压马达有限公司 Rotating motor for engineering vehicle gripping apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10309258B4 (en) * 2003-03-03 2006-10-12 Archimedes Voulgaris Hydraulikmotorenbau Gmbh Device for fastening and for rotary drive of a gripper tool
DE202005009540U1 (en) * 2005-06-17 2006-10-26 Kinshofer Greiftechnik Gmbh & Co. Kg Hydraulic torque motor used as a slewing gear for an excavator grab comprises a rotor supported axially and radially on a housing via sliding bearings and an engine connecting piece joined to the rotor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021161A (en) * 1976-02-17 1977-05-03 Eaton Corporation Rotary fluid pressure device and thrust absorbing arrangement therefor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342131A1 (en) * 1983-11-22 1985-06-05 Kinshofer, Alfred, Ing.(grad.), 8160 Miesbach Annular piston machine
DE3406543A1 (en) * 1984-02-23 1985-09-05 Rudolf 8000 München Braren Positive displacement machine, in particular an epicyclic cycloidal gear mechanism with an integrated hydraulic motor
DE3617313A1 (en) * 1986-05-23 1987-11-26 Kinshofer Greiftechnik Device for connecting a hydraulic torque engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021161A (en) * 1976-02-17 1977-05-03 Eaton Corporation Rotary fluid pressure device and thrust absorbing arrangement therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999008000A1 (en) * 1997-08-12 1999-02-18 Andreas Voulgaris Hydraulic unit with fastening device for additional aggregate units
CN115289087A (en) * 2022-09-28 2022-11-04 宁波中意液压马达有限公司 Rotating motor for engineering vehicle gripping apparatus

Also Published As

Publication number Publication date
ES2028961T3 (en) 1992-07-16
ATE72598T1 (en) 1992-02-15
EP0305785A3 (en) 1989-09-13
DE3729049C1 (en) 1989-03-30
EP0305785B1 (en) 1992-02-12

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