DE202004009821U1 - Hydraulic driving mechanism for mobile vehicles like diggers, loaders and road/motor graders has a hydraulic motor with feed/return of pressurized substance and step-down gearing with power take-off - Google Patents
Hydraulic driving mechanism for mobile vehicles like diggers, loaders and road/motor graders has a hydraulic motor with feed/return of pressurized substance and step-down gearing with power take-off Download PDFInfo
- Publication number
- DE202004009821U1 DE202004009821U1 DE202004009821U DE202004009821U DE202004009821U1 DE 202004009821 U1 DE202004009821 U1 DE 202004009821U1 DE 202004009821 U DE202004009821 U DE 202004009821U DE 202004009821 U DE202004009821 U DE 202004009821U DE 202004009821 U1 DE202004009821 U1 DE 202004009821U1
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- Prior art keywords
- pressure medium
- motor
- mobile vehicles
- return
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
- F16H61/444—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation by changing the number of pump or motor units in operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
- F16H47/04—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
- F16H61/423—Motor capacity control by fluid pressure control means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
- F16H61/439—Control of the neutral position, e.g. by zero tilt rotation holding means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
- F16H61/448—Control circuits for tandem pumps or motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/46—Automatic regulation in accordance with output requirements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
- F16H47/04—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion
- F16H2047/045—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion the fluid gearing comprising a plurality of pumps or motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4043—Control of a bypass valve
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
Description
Hydraulische Antriebe für Mobilfahrzeuge werden insbesondere für Arbeitsmaschinen, wie beispielsweise Radbagger, Radlader oder auch Grader, eingesetzt, bei welchen eine Verbrennungsmaschine eine hydraulische Pumpe antreibt, deren Förderstrom hydraulische Motore mit Druckmittel versorgt, welche wiederum mit Antriebsräder in Verbindung stehen und diese antreiben. Häufig werden Axialkolbenmotore verwendet, welche in ihrem Hubvolumen veränderbar sind, um die Drehzahl des Antriebsrads zu verändern. Bei diesen Axialkolbenmotoren ist jedoch die maximale Drehzahl begrenzt und ein Überschreiten dieser Drehzahl würde zur Beschädigung des Motors führen.hydraulic Drives for Mobile vehicles are used especially for work machines, such as Wheel excavators, wheel loaders or graders, used in which one Internal combustion engine drives a hydraulic pump whose flow rate hydraulic motors supplied with pressure medium, which in turn with drive wheels communicate and drive them. Axial piston motors are common used, which are variable in their stroke volume to the speed to change the drive wheel. However, the maximum speed is limited for these axial piston motors and exceeding this speed would to damage the Engine.
Die
Die
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen hydraulischen Antrieb für Mobilfahrzeuge zu schaffen, bei welcher mindestens ein hydraulischer Motor eine Abtriebswelle antreibt und auch oberhalb einer maximalen Drehzahl dieses Motors mit der Abtriebswelle verbunden bleiben kann, indem der Motor oberhalb seiner maximalen Drehzahl betreibbar ist.The The present invention has for its object a hydraulic Drive for To create mobile vehicles in which at least one hydraulic Motor drives an output shaft and also above a maximum Speed of this motor can remain connected to the output shaft by the engine can be operated above its maximum speed.
Die Aufgabe wird mit einem, auch die kennzeichnenden Merkmale des Hauptanspruchs aufweisenden, gattungsgemäßen hydraulischen Antrieb für Mobilfahrzeuge gelöst.The Task with one, including the characteristic features of the main claim having generic hydraulic Drive for mobile vehicles solved.
Erfindungsgemäß weist der hydraulische Antrieb mindestens einen in seinem Hubvolumen verstellbaren Motor auf, dessen Hubvolumen bis auf Null veränderbar ist. In diesem Zustand weist der Hydromotor nahezu kein Hubvolumen mehr auf, wodurch er einerseits außer der Leckage von dem Volumenstrom der Pumpe keinen Volumenstrom aufnimmt und andererseits kein Drehmoment abgibt. Zusätzlich werden die Druckmittelzuführung und die Druckmittelrückführung von der Pumpe zum Motor verschlossen und die Druckmittelzuführung und die Druckmittelrückführung des hydraulischen Motors kurzgeschlossen und mit mit einem geringen Druck beaufschlagt. Dies ist vorzugsweise der Schmierdruck des Getriebes (Rücklaufdruck nach Kühler). Es besteht auch die Möglichkeit, den Speisedruck zu verwenden. Dadurch wirkt auf den Motor bei seiner Hoch- und Niederdruckseite ausschließlich ein sehr niedriger Druck, wodurch alle Bauteile des Motors mit geringen Kräften beaufschlagt sind und dadurch ein geringes Widerstandsdrehmoment erzeugen, wodurch der Motor in einer sehr hohen Drehzahl betrieben werden kann. Vorzugsweise ist der Motor als Radialkolbenmotor ausgeführt, welcher eine Kurbelwelle aufweist, welche mit den Kolben in Wirkverbindung steht. Indem der Motor so auf Hubvolumen Null verstellt wird, dass er nahezu kein Hubvolumen mehr aufweist, wird die Exzentrizität der Kurbelwelle ausgeglichen, wodurch die Kurbelwelle des Motors konzentrisch zu ihrem Antrieb läuft und die Kolben nahezu keine Hubbewegung in den Zylindern ausführen. Der Radialkolbenmotor ist vorzugsweise, wie der Radialkolbenmotor in der WO 99/17021 A1 ausgeführt, welche hiermit vollständig umfaßt sein soll, wobei die Verstellung des hydraulischen Motors vorzugsweise nicht mechanisch, sondern hydraulisch erfolgt, wodurch die Verstellkolben in der Kurbelwelle über hydraulischen Druck verstellt werden. Vorzugsweise ist der hydraulische Druck mit der Druckmittelzuführung des Motors verbunden, wodurch bei Abschaltung der Druckmittelzufuhr der Motor automatisch in das Null-Hubvolumen verstellt wird. Vorzugsweise wird der Motor zuerst in das Hubvolumen Null verstellt und anschließend vom Hochdruck getrennt.According to the invention the hydraulic drive has at least one adjustable in its stroke volume Engine whose stroke volume can be changed to zero. In this condition the hydromotor has almost no displacement, which makes it on the one hand except the leakage from the volume flow of the pump does not absorb any volume flow and on the other hand does not deliver torque. In addition, the pressure medium supply and the pressure medium return from the pump is closed to the motor and the pressure medium supply and the pressure medium return of the hydraulic motor short-circuited and with a low Pressure applied. This is preferably the lubrication pressure of the transmission (Return pressure after cooler). There is also the possibility to use the feed pressure. This affects the engine at its high and low pressure side only a very low pressure, causing all components of the engine to be low forces are applied and thereby a low resistance torque generate, causing the engine to operate at a very high speed can be. The motor is preferably designed as a radial piston motor, which has a crankshaft which is operatively connected to the pistons. By adjusting the engine to zero stroke volume so that it is almost no longer has a stroke volume, the eccentricity of the crankshaft balanced, causing the crankshaft of the engine to become concentric their drive is running and the pistons make almost no stroke movement in the cylinders. The Radial piston engine is preferably like the radial piston engine in FIG of WO 99/17021 A1, which hereby complete comprises should be, the adjustment of the hydraulic motor is preferably not mechanically, but hydraulically, which causes the adjusting pistons in the crankshaft hydraulic pressure can be adjusted. Preferably the hydraulic one Pressure with the pressure medium supply of the Motor connected, whereby when the pressure medium supply is switched off the motor is automatically adjusted to the zero stroke volume. Preferably the engine is first adjusted to zero stroke volume and then by High pressure separated.
In einer weiteren Ausgestaltungsform ist in dem abgeschalteten Zustand des hydraulischen Motors die Druckmittelzuführung und die Druckmittelrückführung mit dem Druckmittelausgang einer Speisepumpe bzw. dem Schmierdruck des Getriebes (Rücklaufdruck nach Kühler) verbunden, wodurch die Leckage des hydraulischen Motors permanent mit kühlem Druckmittel aufgefüllt wird. Somit wird ein Überhitzen des Motors verhindert. Durch die hydraulische Trennung vom Hochdruck und die Verstellung des hydraulischen Motors in ein Null-Hubvolumen ist es nicht mehr notwendig, den Motor mechanisch von dem Abtrieb zu trennen, wodurch keinerlei Schaltstöße beim Entkoppeln oder beim Wiedereinkoppeln entstehen. Indem der Motor mit Speisedruck oder Schmier druck beaufschlagt bleibt, entleeren sich die Zylinder nicht, wodurch beim Zuschalten kein Schaltstoß entsteht.In a further embodiment, when the hydraulic motor is switched off, the pressure medium supply and the pressure medium return are connected to the pressure medium outlet of a feed pump or the lubrication pressure of the transmission (return pressure after the cooler), as a result of which the leakage of the hydraulic motor is permanently filled with cool pressure medium. This prevents the motor from overheating. Due to the hydraulic separation from the high pressure and the adjustment of the hydraulic motor to a zero stroke volume it is no longer necessary to mechanically separate the motor from the output, so that there are no switching impacts when decoupling or when recoupling. By keeping the engine under supply or lubrication pressure, the cylinders do not empty, which means that there is no switching shock when the engine is switched on.
In einer weiteren Ausgestaltungsform ist der hydraulische Motor als Zusatzantrieb für Vorderräder, beispielsweise eines Graders, ausgestaltet, wobei der Hauptfahrantrieb über den Verbrennungsmotor und ein Untersetzungsgetriebe erfolgt, die hydraulischen Motore bei einem definierten Arbeitsbereich zugeschaltet werden und oberhalb der zulässigen Drehzahl des Hydromotors der Hydromotor hydraulisch mit dem Speisedruck oder Schmierdruck verbunden und auf Null-Schluckvolumen verstellt ist, wodurch der hydraulische Motor oberhalb seiner Drehzahl betrieben werden kann.In Another embodiment is the hydraulic motor as Additional drive for Front wheels, for example a grader, designed, the main drive via the Internal combustion engine and a reduction gear, the hydraulic Motors are switched on in a defined work area and above the permissible speed the hydraulic motor the hydraulic motor with the feed pressure or Lubrication pressure is connected and adjusted to zero swallowing volume, whereby the hydraulic motor is operated above its speed can.
In einer weiteren Ausgestaltungsform sind mindestens zwei hydraulische Motore über ein Summierungsgetriebe mit einer Abtriebswelle verbunden und bilden den Fahrantrieb des Fahrzeugs. Beide Motore sind permanent mit der Abtriebswelle in mechanischer Wirkverbindung und in ihrem Schluckvolumen verstellbar. Zwischen der Abtriebswelle und dem Hydromotor können Untersetzungsgetriebe unterschiedlicher Übersetzung angeordnet sein. Wird der Hydromotor oberhalb seiner zulässigen Drehzahl betrieben, so weist dieser kein Hubvolumen auf und seine Zu- und Rückführung sind mit dem Speisedruck oder Schmierdruck verbunden.In Another embodiment is at least two hydraulic ones Engines over a summation gear connected to an output shaft and form the drive of the vehicle. Both engines are permanent with the Output shaft in mechanical operative connection and in its absorption volume adjustable. Reduction gears can be placed between the output shaft and the hydraulic motor different translation be arranged. If the hydraulic motor is operated above its permissible speed, this has no stroke volume and its supply and return are associated with the feed pressure or lubrication pressure.
Es besteht auch die Möglichkeit, die Motore im offenen Kreis zu betreiben.It there is also the possibility operate the motors in an open circuit.
Indem die Motore nicht auf der Abtriebswelle angeordnet sind, ist es möglich, die Druckmittelzuführung zur Verstellung des Hubvolumens auf einer Seite der Kurbelwelle in der Kurbelwelle anzuordnen und mit dem Hochdruck zu verbinden. Die Abdichtung kann somit auf einem geringen Durchmesser angeordnet sein, wodurch auch bei höheren Drücken höhere Drehzahlen möglich sind.By doing the motors are not arranged on the output shaft, it is possible to Pressure medium feed for adjusting the stroke volume on one side of the crankshaft to be arranged in the crankshaft and connected to the high pressure. The seal can thus be arranged on a small diameter be, whereby even at higher Press higher speeds possible are.
Erfindungsgemäß wird somit ein hydraulischer Antrieb geschaffen, welcher auch oberhalb seiner maximal zulässigen Drehzahl betrieben werden kann und keinerlei mechanische Abschaltvorrichtungen benötigt.According to the invention created a hydraulic drive, which also above his maximum allowable Speed can be operated and no mechanical shutdown devices needed.
Weitere Merkmale sind der Figuren-Beschreibung zu entnehmen. Es zeigen:Further Features can be found in the description of the figures. Show it:
In
einer weiteren Ausgestaltung der Erfindung sind der erste Motor
- 11
- Motorengine
- 22
- DruckmittelzuführungPressure medium feed
- 33
- DruckmittelrückführungPressure fluid recirculation
- 44
- Abtrieboutput
- 55
- UntersetzungsgetriebeReduction gear
- 66
- Abtrieboutput
- 77
- erster Motorfirst engine
- 88th
- erstes Untersetzungsgetriebefirst Reduction gear
- 99
- zweiter Motorsecond engine
- 1010
- zweites Untersetzungsgetriebesecond Reduction gear
- 1111
- Abtriebswelleoutput shaft
- 1212
- Schalteinrichtungswitching device
- 1313
- erste Untersetzungfirst reduction
- 1414
- zweite Untersetzungsecond reduction
- 1515
- DruckmittelquellePressure medium source
- 1616
- Förderausgangdelivery outlet
- 1717
- VentilValve
- 1818
- Saugeingangsuction inlet
- 1919
- VentilValve
- 2020
- Leitungmanagement
- 2121
- Speisepumpefeed pump
- 2222
- Spülventilflush valve
- 2323
- Leitungmanagement
- 2424
- elektronische Steuereinheitelectronic control unit
- 2525
- Proportionalventileproportional valves
- 2626
- Hubvolumen-VerstelleinrichtungDisplacement adjusting
- 2727
- VentilValve
- 2828
- VentilValve
- 2929
- Tanktank
- 3030
- RücklaufleitungReturn line
- 3131
- Kühlercooler
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202004009821U DE202004009821U1 (en) | 2004-05-10 | 2004-05-18 | Hydraulic driving mechanism for mobile vehicles like diggers, loaders and road/motor graders has a hydraulic motor with feed/return of pressurized substance and step-down gearing with power take-off |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004023628A DE102004023628A1 (en) | 2004-05-10 | 2004-05-10 | Hydraulic drive for mobile vehicles |
DE202004009821U DE202004009821U1 (en) | 2004-05-10 | 2004-05-18 | Hydraulic driving mechanism for mobile vehicles like diggers, loaders and road/motor graders has a hydraulic motor with feed/return of pressurized substance and step-down gearing with power take-off |
Publications (2)
Publication Number | Publication Date |
---|---|
DE202004009821U1 true DE202004009821U1 (en) | 2004-09-23 |
DE202004009821U8 DE202004009821U8 (en) | 2005-04-21 |
Family
ID=33099566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE202004009821U Expired - Lifetime DE202004009821U1 (en) | 2004-05-10 | 2004-05-18 | Hydraulic driving mechanism for mobile vehicles like diggers, loaders and road/motor graders has a hydraulic motor with feed/return of pressurized substance and step-down gearing with power take-off |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE202004009821U1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202005007970U1 (en) * | 2005-05-20 | 2006-10-05 | Liebherr-Machines Bulle S.A. | driving device |
EP2312185A3 (en) * | 2009-10-13 | 2012-03-21 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Hydraulic traveling vehicle |
EP2503187A1 (en) * | 2011-03-25 | 2012-09-26 | NAF Neunkirchener Achsenfabrik AG | Drive assembly for a self-propelled work machine |
-
2004
- 2004-05-18 DE DE202004009821U patent/DE202004009821U1/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202005007970U1 (en) * | 2005-05-20 | 2006-10-05 | Liebherr-Machines Bulle S.A. | driving device |
EP2312185A3 (en) * | 2009-10-13 | 2012-03-21 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Hydraulic traveling vehicle |
EP2503187A1 (en) * | 2011-03-25 | 2012-09-26 | NAF Neunkirchener Achsenfabrik AG | Drive assembly for a self-propelled work machine |
WO2012130639A1 (en) * | 2011-03-25 | 2012-10-04 | Naf Neunkirchener Achsenfabrik Ag | Drive device for a self-propelled machine and corresponding method |
RU2556775C2 (en) * | 2011-03-25 | 2015-07-20 | Наф Нойнкирхенер Ахзенфабрик Аг | Drive for wheeled working machine |
US9353841B2 (en) | 2011-03-25 | 2016-05-31 | Naf Neunkirchener Achsenfabrik Ag | Drive device for a self-propelled machine and corresponding method |
Also Published As
Publication number | Publication date |
---|---|
DE202004009821U8 (en) | 2005-04-21 |
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Legal Events
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R207 | Utility model specification |
Effective date: 20041028 |
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R156 | Lapse of ip right after 3 years |
Effective date: 20071201 |