WO1993013954A1 - Single-stage piston/cylinder unit, in particular a shock-absorber strut - Google Patents
Single-stage piston/cylinder unit, in particular a shock-absorber strut Download PDFInfo
- Publication number
- WO1993013954A1 WO1993013954A1 PCT/DE1993/000029 DE9300029W WO9313954A1 WO 1993013954 A1 WO1993013954 A1 WO 1993013954A1 DE 9300029 W DE9300029 W DE 9300029W WO 9313954 A1 WO9313954 A1 WO 9313954A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- tubes
- tube
- extending
- piston rod
- 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.)
- Ceased
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/28—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
-
- 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
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
- B60K17/14—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing the motor of fluid or electric gearing being disposed in, or adjacent to, traction wheel
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- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
Definitions
- the invention relates to a single-stage working cylinder, in particular a spring strut, the pressure spaces of which are delimited by the piston and are connected to a pressure accumulator which, together with the pressure spaces of the cylinder, forms the spring (for example DE-A-35 12 232). .
- Such struts are used in vehicles with large axle loads, such as heavy duty vehicles, mobile cranes and the like, and then also in off-road vehicles, such as agricultural machinery.
- large axle loads such as heavy duty vehicles, mobile cranes and the like
- off-road vehicles such as agricultural machinery.
- people have recently started to drive the wheels directly via wheel hub motors, and then also via hydraulic motors.
- hydraulic drives In connection with hydraulic drives, there is the problem of routing the pressure oil.
- Exposed cables are subject to the risk of damage due to external influences, especially in low-lying vehicles.
- the object of the invention is to offer a solution which provides a line routing which is protected against external influences.
- the object is, in a generic strut OF INVENTION ⁇ dung according achieved in that the working cylinder with min ⁇ least two mutually delimited, telescoping, is provided under pressure medium pressurized bushings whose opposing pressure gripping surfaces are designed the same.
- At least two lines are required for driving a hydraulic motor, namely a line for the supply of the pressure oil driving the motor and a line for the discharge of the pressure oil and the discharge of leakage oil. If it is to be possible to change the direction of rotation, three lines are required, namely two lines for the switchable drive and a leakage oil line. Accordingly, three bushings are usually provided in the strut. Further bushings can be provided, for example for the application of a brake or for engine control. As far as pressure medium pressure is present in the bushings, the opposing pressure application surfaces are to be designed with the same area so that the pressure of the pressure oil driving the wheel hub motor does not influence the spring characteristics of the spring strut.
- FIG. 1 shows a first embodiment of the new shock absorber with three bushings
- FIG. 1 shows another embodiment of the
- Figure 3 shows an embodiment of the strut with two bushings.
- such struts are provided on a vehicle frame 12 in the case of individual suspensions of wheels 11.
- the cylinder 211 of the strut 21 21 is assigned to the vehicle frame 12, the strut 21 is supported on the so-called kingpin 13 via the head plate 263 of the piston rod 262.
- the bushings in the spring strut provided according to the invention serve to apply pressure oil to the wheel hub motor 14 indicated in FIG. 1, optionally driving the wheel 11 in one or the other direction of rotation.
- the motor 14 requires three pressure medium lines 16, 17, 18, namely two lines 16, 17, of which one direction of rotation to be conveyed according to the motor forms the supply line and the other the discharge line, and a leak oil line 18.
- a further hollow piston rod 264 extends, which runs into an annular piston 266 of the cylinder 211, which is formed by the tubes 213, 214 extending from the cylinder base 212, of the cylinder 211 a further two pipes 267, 268 enclosing the piston rod 264 and ending at a distance from the piston 266, the front widened (267 ', 268') sealingly abut against the respectively adjacent one of the pipes 213, 214 starting from the cylinder base 212.
- the annular piston 266 divides the annular space 217 into the region 217 on the cylinder side and a region on the piston rod side, which is divided into the partial regions 217 ′, 217 ′′ by the piston rod 264.
- the (267 ′ r 268 ′) widened on the end face extend from the top plate 263
- the pipes 267, 268 shield the areas 217 ', 217 "of the annular space 217 formed between the pipes 213, 214 starting from the cylinder bottom 212, leaving the passages 269, 268, formed by the pipes 267, 268 starting from the top plate 263, 271 opposite the head plate-side regions 217 "', 217 IV of the hollow piston rods 262, 264.
- the annular space 219 formed by the double-walled tube 213 extending from the cylinder base 212 is continuous (224 ⁇ to that on the one hand by the piston 266 and others - on the other hand, from the widened end 267 'of the region 217' of the tube 267, starting from the top plate 263 and comprising the piston rod 264, of the region 217 'of the annular space 217, formed by the cylinder base 212, and that of the annular space 217, that of the cylinder base
- the annular space 221 formed from the double-walled tube 214 extending from 212 is continuous (226) to the tube 266 ', on the one hand, from the piston 266 and, on the other hand, from the widened end 268' of the tube leading from the head plate 263 and leading in the piston rod 264 268 delimited area 217 "of the annular space 217 formed by the tubes 213, 214 extending from the cylinder base 212.
- connection between the line 16 leading to the wheel hub motor 14 and the pump or the tank forms the bushing resulting from the annular spaces or annular space regions 219, 217 'and the passage 269 in the strut 21, on which the head plate side -
- the end of line 16 is connected (272) and the connection line to the pump or tank starts at 227 on the cylinder bottom side.
- the connection between the line 17 leading to the wheel hub motor 14 and the pump or the tank results from the passage formed in the spring strut 21 by the annular spaces or annular space areas 221, 217 "and the passage 271, on the head plate side at 273
- the line 17 is connected and the line leading to the pump or tank extends from the cylinder bottom side at 228.
- the passage for the leak oil is provided by the central passage 218 starting from the cylinder bottom 212 and into the space 217 1 on the head plate side v passes to which the leak oil line 18 is connected at 274.
- the line leading to the tank is connected to this bushing at 229.
- Ventilation can also be provided in a manner known per se.
- 311 denotes the cylinder, from the bottom 312 of which two concentric tubes 313 and 314 extend, with on the outer, thick-walled tube 313 at a distance from the cylinder bottom 312 and on the end face annular shoulders 316, 317 are formed.
- the working piston 361 leads into the exterior of the tubes 313, 314 starting from the cylinder base, specifically on its ring shoulders 316, 317, passes the leading piston rod 362, which has a recess 363 on the cylinder bottom side, into which the interior of the tubes 313, 314 extending from the cylinder bottom 312 extends.
- a double-walled tube 367 which surrounds the piston rod 362, extends from the head plate 366 of the piston rod 362 and extends into the outer wall of the cylinder wall 312, which extends from the cylinder base 312.
- existing tubes 313, 314 formed annular space 319 extends in a leading manner on the cylinder wall and on the annular shoulders 316, 317 of the outer tube 313, 314 extending from the cylinder base.
- An annular space 368 which is closed at the end, is formed between the walls of the tube 367.
- the first pressure chamber 318 of the shock absorber is formed between the cylinder base 312 and the piston 361
- the second pressure chamber 318 ′ of the shock absorber is formed between the working piston 361 and the annular shoulder 316 on the cylinder base side of the outer tube 313, 314 extending from the cylinder base.
- This pressure chamber is continuous (364) to the recess 363 on the cylinder bottom side in the piston rod 362, into which the interior of the tubes 213, 214 extending from the cylinder bottom extends.
- annular space region 318 is defined by the annular shoulders 316, 317 on the tube 313, and also through the tube 313 starting from the cylinder base 312 and that from the top plate 366 outgoing tube 367 surrounding the piston rod 362 is an annular space region 319 'which is likewise delimited by the annular shoulders 316, 317 located on the tube 313.
- the annular space region 318 is accessible from the cylinder base 312 through a through the outer one which extends from the cylinder base 312 Tubes 313, 314 extending bore 321, this annular space region is accessible from the top plate 366 through a bore 369 extending through the piston rod 362.
- annular space region 319 ' is again from the cylinder base 312 through another one through the exterior of the Cylinder base 312 outgoing tubes 313, 314 extending bore 322 accessible,. the access on the head plate side results from the annular space 368 which is formed in the tube 367 which extends from the top plate 366 and surrounds the piston rod 362 and which is continuous to the annular space 319 '(371).
- the one for changing the Feedthroughs required for the drive motor are formed on the one hand by the bore 321 in the outside of the tubes emanating from the cylinder base 312, the annular region 318 "between the piston rod 362 and the tube 313 emanating from the cylinder base 312 and the bore 369 emanating from the head plate in the Piston rod 362 and on the other hand from the bore 322 in the tube 313 originating from the cylinder base 312, the annular space region 319 ′ formed between the tube 313 and the tube surrounding the piston plate 366, surrounding the piston rod 362, and in the tube originating from the head plate 63 367 formed annular space 368.
- the leakage oil bushing results from the annular space 319 formed between the cylinder wall and the outer of the tubes 313, 314 extending from the cylinder base 312 on the one hand and the free space 319 "between the head plate 366 of the piston rod 362 and the front annular shoulder 317 of the outer starting from the cylinder base 312 end pipes 313, 314, on the other hand, which are connected by a further bore 323 extending through the outer of the tubes 313, 314 extending from the cylinder base 312.
- the strut shown in FIG. 3, designed for two bushings, consists of the cylinder 411, from the bottom 412 of which two concentric tubes 413 and 414 extend, which form annular spaces 416 and 417.
- the piston 461 with the piston rod 462 runs in the annular space 416.
- the annular space region 416 delimited by the cylinder base 412 and by the piston 461 forms the first pressure space of the shock absorber, the annular space region 416 'delimited by the piston rod 462 and the cylinder wall (411) forms the second Strut pressure chamber.
- the seal 424 on the end face of the outer (413) of the tubes 413, 414 extending from the cylinder base 412 further forms an annular space 422 together with the strut piston 461.
- a seal 469 on the front side of the outer (464) of the tubes 464, 466 extending from the head plate 463 of the piston rod 462 and extending between the tubes 413, 414 extending from the cylinder base 412 forms together with the one on the front side of the inner (414) of the tubes 423, 414 extending from the cylinder base 412 located an seal 426 from an annular space 423.
- the pressure chambers 416, 416 'of the shock absorber are connected to a reservoir via the connections 432 and 473, in the case of a working cylinder to a pump.
- the first passage is from the inner (414) of the tubes 413, 414 extending from the cylinder bottom 412 with the connection 429 and formed by the inner (466) of the tubes 464, 466 extending from the head plate 463 with the connection 472.
- the second passage runs through the annular space 417 formed between the tubes 413, 414 extending from the cylinder base 412, which is continuous (427) to between the outer (413) of the tubes 413, 414 extending from the cylinder base 412 and the piston rod wall (462) formed annular space 423, on which the piston rod 462 outgoing connection 471, which extends through the thick-walled wall of the piston rod 462.
- the annular space 423 formed between the inner (414) of the tubes 413, 414 extending from the cylinder base 412 and the outer (464) of the tubes 464, 466 extending from the head plate 463 of the piston rod 462 is continuous (428) to the interior (414) of the Pipes 413, 414 extending from the cylinder base 412 and from the inside (466) of the passage 464, 466 formed by the head plate 463 of the piston rod 462.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Vehicle Body Suspensions (AREA)
- Motor Power Transmission Devices (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Einstufiger Arbeitszylinder, insbesondere FederbeinSingle-stage working cylinder, especially strut
Die Erfindung betrifft einen einstufigen Arbeitszylinder, inssbesondere ein Federbein, dessen durch den Kolben gegen¬ einander abgegrenzte Druckräume an einen Druckspeicher ange¬ schlossen sind, der zusammen mit den Druckräumen des Zylin¬ ders die Feder bildet (z.B. DE-A-35 12 232) .The invention relates to a single-stage working cylinder, in particular a spring strut, the pressure spaces of which are delimited by the piston and are connected to a pressure accumulator which, together with the pressure spaces of the cylinder, forms the spring (for example DE-A-35 12 232). .
Solche Federbeine finden Verwendung bei Fahrzeugen mit großen Achslasten, wie Schwerlastfahrzeuge, Autokranen und dergleichen und dann auch bei geländegängigen Fahrzeugen, wie Landmaschinen. Insbesondere bei Einzelradaufhängungen geht man neuerdings dazu über, die Räder unmittelbar über Radnabenmotore anzutreiben, dann auch über Hydromotore. In Zusammenhang mit Hydroantrieben stellt sich das Problem der Leitungsführung für das Drucköl. Freiliegende Leitungen unterliegen zumal bei tiefliegenden Fahrzeugen der Gefahr von Beschädigungen durch äußere Einwirkungen. Ausgehend vom Stand der Technik, der freiliegende Leitungen für den Druckδlkreislauf vorsieht, liegt der Erfindung die Aufgabe zugrunde eine Lösung anzubieten, die eine gegen äußere Einwirkungen geschützte Leitungsführung erbringt.Such struts are used in vehicles with large axle loads, such as heavy duty vehicles, mobile cranes and the like, and then also in off-road vehicles, such as agricultural machinery. In particular with independent wheel suspensions, people have recently started to drive the wheels directly via wheel hub motors, and then also via hydraulic motors. In connection with hydraulic drives, there is the problem of routing the pressure oil. Exposed cables are subject to the risk of damage due to external influences, especially in low-lying vehicles. Starting from the prior art, which provides exposed lines for the pressure oil circuit, the object of the invention is to offer a solution which provides a line routing which is protected against external influences.
Die Aufgabe wird bei einem gattungsgemäßen Federbein erfin¬ dungsgemäß dadurch gelöst, daß der Arbeitszylinder mit min¬ destens zwei gegeneinander abgegrenzten, teleskopierbaren, unter Druckmitteldruck stehenden Durchführungen versehen ist, deren einander gegenüberliegende Druckangriffsflächen gleich ausgelegt sind.The object is, in a generic strut OF INVENTION ¬ dung according achieved in that the working cylinder with min¬ least two mutually delimited, telescoping, is provided under pressure medium pressurized bushings whose opposing pressure gripping surfaces are designed the same.
Benötigt werden für den Antrieb eines Hydromotors min¬ destens zwei Leitungen, nämlich eine Leitung für die Zulei¬ tung des den Motor antreibenden Drucköls und eine Leitung für die Ableitung des Drucköls sowie die Ableitung von Leck- öl. Soll ein Wechsel des Drehsinns möglich sein, werden drei Leitungen benötigt, nämlich zwei Leitungen für den umschalt¬ baren Antrieb und eine Leckölleitung. Dementsprechend sind in der Regel drei Durchführungen im Federbein vorzusehen. Weitere Durchführungen können vorgesehen sein, etwa für die Beaufschlagung einer Bremse oder für die Motorsteuerung. Soweit in den Durchführungen Druckmitteldruck ansteht, sind jeweils die einander gegenüberliegenden Druckangriffsflächen flächengleich auszulegen, damit der Druck des den Radnaben¬ motor antreibenden Drucköls die Federcharakteristik des Federbeins nicht beeinflußt.At least two lines are required for driving a hydraulic motor, namely a line for the supply of the pressure oil driving the motor and a line for the discharge of the pressure oil and the discharge of leakage oil. If it is to be possible to change the direction of rotation, three lines are required, namely two lines for the switchable drive and a leakage oil line. Accordingly, three bushings are usually provided in the strut. Further bushings can be provided, for example for the application of a brake or for engine control. As far as pressure medium pressure is present in the bushings, the opposing pressure application surfaces are to be designed with the same area so that the pressure of the pressure oil driving the wheel hub motor does not influence the spring characteristics of the spring strut.
Konstruktive Ausgestaltungen von Federbeinen mit zwei Durch¬ führungen ergeben sich aus den Unteransprüchen 2 bis 5, kon¬ struktive Ausgestaltungen von Federbeinen mit drei Durchfüh¬ rungen ergeben sich aus Unteranspruch 5 in Verbindung mit Unteranspruch 6 sowie aus Unteranspruch 7. Die zunächst in Zusammenhang mit Federbeinen konzipierte Lösung bietet sich auch für einstufige Arbeitszylinder mit Durchführungen für einen nachgeordneten Arbeitszylinder an, bei dem sonst aufgrund der von dem in den Durchführungen anstehenden Druckmittel herrührende Druckkomponenten undkon- trollierte Lageveränderungen auftreten würden.Structural designs of suspension struts with two bushings result from subclaims 2 to 5; design configurations of suspension struts with three bushings result from sub-claim 5 in conjunction with sub-claim 6 and from sub-claim 7. The solution, which was initially designed in connection with spring struts, is also suitable for single-stage working cylinders with bushings for a downstream working cylinder, in which pressure components and controlled changes in position would otherwise occur due to the pressure medium in the bushings.
In der Zeichnung ist die Erfindung anhand von Ausführungs¬ beispielen weitergehend erläutert. Es zeigen:In the drawing, the invention is explained in greater detail on the basis of exemplary embodiments. Show it:
Figur 1 eine erste Ausführungsform des neuen Federbeins mit drei Durch¬ führungen,FIG. 1 shows a first embodiment of the new shock absorber with three bushings,
Figur 2 eine weitere Ausführungsform desFigure 2 shows another embodiment of the
Federbeins mit drei Durchführungen,Shock absorber with three bushings,
Figur 3 eine Ausführungsform des Federbeins mit zwei Durchführungen.Figure 3 shows an embodiment of the strut with two bushings.
Wie aus Figur 1 ersichtlich ist, sind solche Federbeine bei Einzelaufhängungen von Laufrädern 11 an einem Fahrzeugrahmen 12 vorgesehen. Dabei ist der Zylinder 211 des Federbeins 21 21 dem Fahrzeugrahmen 12 zugeordnet, über die Kopfplatte 263 der Kolbenstange 262 stützt sich das Federbein 21 an der sogenannten Achsschenkelglocke 13 ab. Die erfindungsgemäß vorgesehenen Durchführungen im Federbein dienen der Beauf¬ schlagung, des in Figur 1 angedeuteten, das Rad 11 wahlweise in dem einen oder im anderen Drehsinn antreibenden Radnaben¬ motors 14 mit Drucköl . Der Motor 14 benötigt drei Druckmit¬ telleitungen 16, 17, 18, nämlich zwei Leitungen 16, 17, von denen jeweils eine entsprechend dem Motor zu vermittelnden Drehsinn die Zuleitung bildet und die andere die Ableitung, und eine Leckölleitung 18. Vom Boden 212 des Federbeinzylinders 211 gehen Ringräume 216, 217 und einen Durchgang 218 ausbildende doppelwandige Rohre 213, 214 aus, zwischen deren Wandungen weitere stirn¬ seitig geschlossene Ringräume 219, 221 ausgebildet sind. In dem Ringraum 216 führt sich der Arbeitskolben 261, der diesen Ringraum in den Druckraum 216 und den Druckraum 216' unterteilt. An den Druckraum 216 ist bei 222 eine erste Druckmittelleitung angeschlossen, an den Druckraum 216' bei 223 eine zweite Druckmittellεitung. Beide Leitungen führen zu einem nicht dargestellten Druckmittelspeicher, der zusam¬ men mit den Druckräumen 216 und 216' die Feder bildet. Von der die hohle Kolbenstange 262 des Arbeitskolbens 261 stirnseitig abschließenden Kopfplatte 263 gehen eine weitere hohle Kolbenstange 264 aus, die in einen sich im von den vom Zylinderboden 212 ausgehenden Rohren 213, 214 ausgebildeten Ringraum 217 des Zylinders 211 führenden Ringkolben 266 aus¬ läuft, des weiteren zwei die Kolbenstange 264 einfassende, im Abstand vom Kolben 266 endende Rohre 267, 268, die stirn¬ seitig aufgeweitet (267', 268') dichtend gegen das jeweils angrenzende der vom Zylinderboden 212 ausgehenden Rohre 213, 214 anliegen. Der Ringkolben 266 unterteilt den Ringraum 217 in den zylinderseitigen Bereich 217 und einen kolben- stangenseitigen Bereich, der durch die Kolbenstange 264 in die Teilbereiche 217', 217" unterteilt ist. Die stirnseitig aufgeweiteten (267' r 268') von der Kopfplatte 263 ausgehen¬ den Rohre 267, 268 schirmen die zwischen den vom Zylinder¬ boden 212 ausgehenden Rohren 213 , 214 ausgebildeten Bereiche 217', 217" des Ringraums 217 unter Belassung der durch die von den von der Kopfplatte 263 ausgehenden Rohren 267, 268 ausgebildeten Durchgänge 269, 271 gegenüber den kopfplatten- seitigen Bereichen 217"', 217IV der hohlen Kolbenstangen 262, 264 ab. Der von dem vom Zylinderboden 212 ausgehenden doppelwandigen Rohr 213 ausgebildete Ringraum 219 ist durch¬ gängig (224} zu dem einerseits von dem Kolben 266 und ande- rerseits von dem aufgeweiteten Ende 267 ' des von der Kopf¬ platte 263 ausgehenden, die Kolbenstange 264 umfassenden Rohres 267 eingegrenzten Bereich 217 ' des von dem vom Zylin¬ derboden 212 ausgehenden Rohren 213, 214 ausgebildeten Ring¬ raums 217, der von dem vom Zylinderboden 212 ausgehenden doppelwandigen Rohr 214 ausgebildete Ringraum 221 ist durch¬ gängig (226) zu dem einerseits von dem Kolben 266 und ande¬ rerseits von dem aufgeweiteten Ende 268' des von der Kopf¬ platte 263 ausgehenden, sich in der Kolbenstange 264 führen¬ den Rohres 268 eingegrenzten Bereich 217" des von den vom Zylinderboden 212 ausgehenden Rohren 213, 214 ausgebildeten Ringraums 217.As can be seen from FIG. 1, such struts are provided on a vehicle frame 12 in the case of individual suspensions of wheels 11. The cylinder 211 of the strut 21 21 is assigned to the vehicle frame 12, the strut 21 is supported on the so-called kingpin 13 via the head plate 263 of the piston rod 262. The bushings in the spring strut provided according to the invention serve to apply pressure oil to the wheel hub motor 14 indicated in FIG. 1, optionally driving the wheel 11 in one or the other direction of rotation. The motor 14 requires three pressure medium lines 16, 17, 18, namely two lines 16, 17, of which one direction of rotation to be conveyed according to the motor forms the supply line and the other the discharge line, and a leak oil line 18. From the bottom 212 of the strut cylinder 211, annular spaces 216, 217 and double-walled tubes 213, 214 forming a passage 218 extend, between the walls of which further annular spaces 219, 221 closed at the end are formed. The working piston 261 leads in the annular space 216 and divides this annular space into the pressure space 216 and the pressure space 216 '. A first pressure medium line is connected to the pressure space 216 at 222, and a second pressure medium line is connected to the pressure space 216 ′ at 223. Both lines lead to a pressure medium reservoir, not shown, which forms the spring together with the pressure chambers 216 and 216 '. From the head plate 263, which closes the hollow piston rod 262 of the working piston 261 at the end, a further hollow piston rod 264 extends, which runs into an annular piston 266 of the cylinder 211, which is formed by the tubes 213, 214 extending from the cylinder base 212, of the cylinder 211 a further two pipes 267, 268 enclosing the piston rod 264 and ending at a distance from the piston 266, the front widened (267 ', 268') sealingly abut against the respectively adjacent one of the pipes 213, 214 starting from the cylinder base 212. The annular piston 266 divides the annular space 217 into the region 217 on the cylinder side and a region on the piston rod side, which is divided into the partial regions 217 ′, 217 ″ by the piston rod 264. The (267 ′ r 268 ′) widened on the end face extend from the top plate 263 The pipes 267, 268 shield the areas 217 ', 217 "of the annular space 217 formed between the pipes 213, 214 starting from the cylinder bottom 212, leaving the passages 269, 268, formed by the pipes 267, 268 starting from the top plate 263, 271 opposite the head plate-side regions 217 "', 217 IV of the hollow piston rods 262, 264. The annular space 219 formed by the double-walled tube 213 extending from the cylinder base 212 is continuous (224} to that on the one hand by the piston 266 and others - on the other hand, from the widened end 267 'of the region 217' of the tube 267, starting from the top plate 263 and comprising the piston rod 264, of the region 217 'of the annular space 217, formed by the cylinder base 212, and that of the annular space 217, that of the cylinder base The annular space 221 formed from the double-walled tube 214 extending from 212 is continuous (226) to the tube 266 ', on the one hand, from the piston 266 and, on the other hand, from the widened end 268' of the tube leading from the head plate 263 and leading in the piston rod 264 268 delimited area 217 "of the annular space 217 formed by the tubes 213, 214 extending from the cylinder base 212.
Die Verbindung zwischen der zum Radnabenmotor 14 führenden Leitung 16 und der nicht dargestellten Pumpe bzw. dem nicht dargestellten Tank bildet die sich aus den Ringräumen bzw. Ringraumbereichen 219, 217' und dem Durchgang 269 im Feder¬ bein 21 ergebende Durchführung, an der die kopfplattensei- tige Leitung 16 angeschlossen (272) ist und von der zylin- derbodenseitig bei 227 die Verbindungsleitung zur Pumpe bzw. zum Tank ausgeht. Die Verbindung zwischen der zum Radnaben¬ motor 14 führenden Leitung 17 und der Pumpe bzw. dem Tank ergibt sich aus der von den Ringräumen bzw. Ringraumberei¬ chen 221, 217" und den Durchgang 271 gebildeten Durchführung im Federbein 21, an der kopfplattenseitig bei 273' die Lei¬ tung 17 angeschlossen ist und von der zylinderbodenseitig bei 228 die zur Pumpe bzw. Tank führende Leitung ausgeht. Die Durchführung Für das Leckδl wird gebilet von dem zen¬ trischen vom Zylinderboden 212 ausgehenden Durchgang 218, der kopfplattenseitig in den Raum 2171 v übergeht, an den die Leckölleitung 18 bei 274 angeschlossen ist. Zylinderboden¬ seitig ist an diese Durchführung bei 229 die zum Tank füh¬ rende Leitung angeschlossen. Mit dieser Lecköldurchführung sind im übrigen der zwischen Zylinderboden 212 und Kolben 266 liegende Bereich des Ringraums 217 und der zwischen der Kopfplatte 263 und dem Kolben 261 liegende Bereich 217"* kurzgeschlossen (231, 276), so daß aus diesen Räumen ver¬ drängtes öl abströmen kann.The connection between the line 16 leading to the wheel hub motor 14 and the pump or the tank (not shown) forms the bushing resulting from the annular spaces or annular space regions 219, 217 'and the passage 269 in the strut 21, on which the head plate side - The end of line 16 is connected (272) and the connection line to the pump or tank starts at 227 on the cylinder bottom side. The connection between the line 17 leading to the wheel hub motor 14 and the pump or the tank results from the passage formed in the spring strut 21 by the annular spaces or annular space areas 221, 217 "and the passage 271, on the head plate side at 273 The line 17 is connected and the line leading to the pump or tank extends from the cylinder bottom side at 228. The passage for the leak oil is provided by the central passage 218 starting from the cylinder bottom 212 and into the space 217 1 on the head plate side v passes to which the leak oil line 18 is connected at 274. On the cylinder bottom side, the line leading to the tank is connected to this bushing at 229. With this leak oil feed-through, the line between the cylinder bottom 212 and the piston is otherwise 266 area of the annular space 217 and the area 217 "* between the head plate 263 and the piston 261 short-circuited (231, 276), so that displaced oil can flow out of these spaces.
Das in Figur 1 dargestellte, drei Durchführungen aufweisende Federbein läßt sich ohne weiteres auf ein Federbein mit zwei Durchführungen zurückführen, in dem anstelle des inneren der vom Zylinderboden ausgehenden doppelwandigen Rohres ein normales stirnseitig zugesetztes, zum Ringraum 217" durch¬ gängiges Rohr eingesetzt wird und einer der Anschlüsse 228, 229 im Zylinderboden 212 und der Anschluß 274 in der Kopfplatte 263 abgeworfen werden.The spring strut shown in FIG. 1, which has three bushings, can easily be traced back to a spring strut with two bushings, in which instead of the inside of the double-walled tube emanating from the cylinder bottom, a normal tube, which is added on the end face and is continuous to the annular space 217 ", is used, and one the ports 228, 229 in the cylinder base 212 and the port 274 in the top plate 263 are dropped.
Anstelle der Leckölleitung 231 und 276 im Zylinderboden 212 und in der Kopfplatte 263 können in an sich bekannter Weise natürlich auch Be- bzw. Entlüftungen vorgesehen sein.Instead of the leak oil line 231 and 276 in the cylinder base 212 and in the head plate 263, ventilation can also be provided in a manner known per se.
Bei der in Figur 2 dargestellten Ausführungsform des Feder¬ beins ist mit 311 der Zylinder bezeichnet, von dessen Boden 312 zwei konzentrische Rohre 313 und 314 ausgehen, wobei auf dem äußeren, dickwandigen Rohr 313 im Abstand vom Zylinder¬ boden 312 und stirnseitig Ringschultern 316, 317 ausgebildet sind. Im äußeren der vom Zylinderboden 312 ausgehenden Rohre 313, 314 und auf dem inneren dieser Rohre führt sich der Arbeitskolben 361, der in die sich im äußeren der vom Zylin¬ derboden ausgehenden Rohre 313, 314, konkret an dessen Ring¬ schultern 316, 317, führende Kolbenstange 362 übergeht, die zylinderbodenseitig einen Rück-sprung 363 aufweist, in den hinein sich das innere der vom Zylinderboden 312 ausgehenden Rohre 313, 314 erstreckt. Von der Kopfplatte 366 der Kolben¬ stange 362 geht ein die Kol-benstange 362 umgebendes, doppelwandiges Rohr 367 aus, das sich in den von der Zylin¬ derwandung und dem äußeren der vom Zylinderboden 312 ausge- henden Rohre 313, 314 ausgebildeten Ringraum 319, sich an der Zylinderwandung und an den Ringschultern 316, 317 des äußeren der vom Zylinderboden ausgehenden Rohre 313, 314 führend erstreckt. Zwischen den Wandungen des Rohres 367 ist ein stirnseitig geschlossener Ringraum 368 ausgebildet. Zwischen dem Zylinderboden 312 und dem Kolben 361 ist der erste Druckraum 318 des Federbeins ausgebildet, der zweite Druckraum 318' des Federbeins ist zwischen dem Arbeitskolben 361 und der zylinderbodenseitigen Ringschulter 316 des äußeren der vom Zylinderboden ausgehenden Rohre 313, 314 ausgebildet. Dieser Druckraum ist durchgängig (364) zu dem zylinderbodenseitigen Rücksprung 363 in der Kolbenstange 362, in die sich das innere der vom Zylinderboden ausgehen¬ den Rohre 213, 214 hinein erstreckt. Zwischen dem äußeren der vom Zylinderboden 312 ausgehenden Rohre 313, 314 und der Kolbenstange 362 ist ein durch die Ringschultern 316, 317 auf dem Rohr 313 eingegrenzter Ringraumbereich 318" ausge¬ bildet, sowie durch das vom Zylinderboden 312 ausgehende Rohr 313 und das von der Kopfplatte 366 ausgehende, die Kolbenstange 362 umgebende Rohr 367 ein ebenfalls durch die auf dem Rohr 313 befindlichen Ringschultern 316, 317 einge¬ grenzten Ringraumbereich 319' . Der Ringraumbereich 318" ist vom Zylinderboden 312 her zugänglich durch eine sich durch das äußere der vom Zylinderboden 312 ausgehenden Rohre 313, 314 erstreckende Bohrung 321, von der Kopfplatte 366 her ist dieser Ringraumbereich zugänglich durch eine sich durch die Kolbenstange 362 erstreckende Bohrung 369. Der Ringraum¬ bereich 319' ist vom Zylinderboden 312 her auch wieder durch eine weitere sich durch das äußere der vom Zylinderboden 312 ausgehenden Rohre 313, 314 erstreckende Bohrung 322 zugäng¬ lich, . der kopfplattenseitige Zugang ergibt sich aus dem in dem von der Kopflatte 366 ausgehenden, die Kolbenstange 362 umgebende Rohr 367 ausgebildeten Ringraum 368, der zu dem Ringraum 319' durchgängig ist (371) . Die für den Wechsel des Drehsinn des Antriebsmotors erforderlichen Durchführungen werden zum einen gebildet von der Bohrung 321 im äußeren der vom Zylinderboden 312 ausgehenden Rohre, dem Ringraumbereich 318" zwischen der Kolbenstange 362 und dem vom Zylinderboden 312 ausgehenden Rohr 313 sowie der von der Kopfplatte ausge¬ henden Bohrung 369 in der Kolbenstange 362 und zum andern von der Bohrung 322 im vom Zylinderboden 312 ausgehenden Rohr 313, dem zwischen dem Rohr 313 und dem von der Kopf¬ platte 366 ausgehenden, die Kolbenstange 362 umgebenden Rohr ausgebildeten Ringraumbereich 319 ' sowie dem im von der Kopfplatte 63 ausgehenden Rohr 367 ausgebildeten Ringraum 368. Die Lecköldurchführung ergibt sich aus dem zwischen der Zylinderwandung und dem äußeren der vom Zylinderboden 312 ausgehenden Rohre 313, 314 ausgebildeten Ringraum 319 einerseits und dem Freiraum 319" zwischen der Kopfplatte 366 der Kolbenstange 362 und der stirnseitigen Ringschulter 317 des äußeren der vom Zylinderboden 312 ausgehenden Rohre 313, 314 andererseits, die durch eine weitere sich durch das äußere der vom Zylinderboden 312 ausgehenden Rohre 313, 314 erstreckende Bohrung 323 verbunden sind.In the embodiment of the spring strut shown in FIG. 2, 311 denotes the cylinder, from the bottom 312 of which two concentric tubes 313 and 314 extend, with on the outer, thick-walled tube 313 at a distance from the cylinder bottom 312 and on the end face annular shoulders 316, 317 are formed. In the outer of the tubes 313, 314 starting from the cylinder base 312 and on the interior of these tubes, the working piston 361 leads into the exterior of the tubes 313, 314 starting from the cylinder base, specifically on its ring shoulders 316, 317, passes the leading piston rod 362, which has a recess 363 on the cylinder bottom side, into which the interior of the tubes 313, 314 extending from the cylinder bottom 312 extends. A double-walled tube 367, which surrounds the piston rod 362, extends from the head plate 366 of the piston rod 362 and extends into the outer wall of the cylinder wall 312, which extends from the cylinder base 312. existing tubes 313, 314 formed annular space 319, extends in a leading manner on the cylinder wall and on the annular shoulders 316, 317 of the outer tube 313, 314 extending from the cylinder base. An annular space 368, which is closed at the end, is formed between the walls of the tube 367. The first pressure chamber 318 of the shock absorber is formed between the cylinder base 312 and the piston 361, the second pressure chamber 318 ′ of the shock absorber is formed between the working piston 361 and the annular shoulder 316 on the cylinder base side of the outer tube 313, 314 extending from the cylinder base. This pressure chamber is continuous (364) to the recess 363 on the cylinder bottom side in the piston rod 362, into which the interior of the tubes 213, 214 extending from the cylinder bottom extends. Between the outer of the tubes 313, 314 starting from the cylinder base 312 and the piston rod 362, an annular space region 318 "is defined by the annular shoulders 316, 317 on the tube 313, and also through the tube 313 starting from the cylinder base 312 and that from the top plate 366 outgoing tube 367 surrounding the piston rod 362 is an annular space region 319 'which is likewise delimited by the annular shoulders 316, 317 located on the tube 313. The annular space region 318 "is accessible from the cylinder base 312 through a through the outer one which extends from the cylinder base 312 Tubes 313, 314 extending bore 321, this annular space region is accessible from the top plate 366 through a bore 369 extending through the piston rod 362. The annular space region 319 'is again from the cylinder base 312 through another one through the exterior of the Cylinder base 312 outgoing tubes 313, 314 extending bore 322 accessible,. the access on the head plate side results from the annular space 368 which is formed in the tube 367 which extends from the top plate 366 and surrounds the piston rod 362 and which is continuous to the annular space 319 '(371). The one for changing the Feedthroughs required for the drive motor are formed on the one hand by the bore 321 in the outside of the tubes emanating from the cylinder base 312, the annular region 318 "between the piston rod 362 and the tube 313 emanating from the cylinder base 312 and the bore 369 emanating from the head plate in the Piston rod 362 and on the other hand from the bore 322 in the tube 313 originating from the cylinder base 312, the annular space region 319 ′ formed between the tube 313 and the tube surrounding the piston plate 366, surrounding the piston rod 362, and in the tube originating from the head plate 63 367 formed annular space 368. The leakage oil bushing results from the annular space 319 formed between the cylinder wall and the outer of the tubes 313, 314 extending from the cylinder base 312 on the one hand and the free space 319 "between the head plate 366 of the piston rod 362 and the front annular shoulder 317 of the outer starting from the cylinder base 312 end pipes 313, 314, on the other hand, which are connected by a further bore 323 extending through the outer of the tubes 313, 314 extending from the cylinder base 312.
Das in Figur 3 dargestellte, für zwei Durchführungen ausge¬ legte Federbein besteht aus dem Zylinder 411, von dessen Boden 412 zwei konzentrische Rohre 413 und 414 ausgehen, die Ringräume 416 und 417 ausbilden. Im Ringraum 416 führt sich der Kolben 461 mit der Kolbenstange 462. Der vom Zylidner- boden 412 und vom Kolben 461 eingegrenzte Ringraumbereich 416 bildet den ersten Druckraum des Federbeins, der von der Kolbenstange 462 und der Zylinderwandung (411) eingegrenzte Ringraumbereich 416' den zweiten Druckraum des Federbeins. Von der Kopfplatte 463 der hohlen Kolbenstange 462 gehen zwei konzentrische Rohre 464 und 466 aus, von denen sich das Rohr 464 in den zwischen den vom Zylinderboden 412 ausgehen¬ den Rohren 413, 414 ausgebildeten Ringraum 417 erstreckt und das Rohr 466 in das innere (414) der vom Zylinderboden 412 ausgehenden Rohre 413, 414. Die stirnseitigen Abdichtungen 424, 426 an den vom Zylinderboden 412 ausgehenden, sich zwischen die Kolbenstangenwandung (462) und das von der Kopfplatte 463 der Kolbenstange 462 ausgehende Rohr 464 bzw. zwischen die von der Kopfplatte 463 ausgehenden Rohre 464, 466 erstreckenden Rohre 413, 414 bilden zwischen der Kopf¬ platte 463 und den Abdichtungen 424, 426 Ringräume 467, 468 aus. Die Abdichtung 424 an der Stirnseite des äußeren (413) der vom Zylinderboden 412 ausgehenden Rohre 413, 414 bildet zusammen mit dem Federbeinkolben 461 des weiteren einen Ringraum 422 aus. Eine Abdichtung 469 an der Stirnseite des äußeren (464) der von der Kopfplatte 463 der Kolbenstange 462 ausgehenden, sich zwischen die vom Zylinderboden 412 ausgehenden Rohre 413, 414 erstreckenden Rohre 464, 466 bildet gemeinsam mit der an der Stirnseite des vom inneren (414) der vom Zylinderboden 412 ausgehenden Rohre 413, 414 befindlichen Abdichtung 426 einen Ringraum 423 aus.The strut shown in FIG. 3, designed for two bushings, consists of the cylinder 411, from the bottom 412 of which two concentric tubes 413 and 414 extend, which form annular spaces 416 and 417. The piston 461 with the piston rod 462 runs in the annular space 416. The annular space region 416 delimited by the cylinder base 412 and by the piston 461 forms the first pressure space of the shock absorber, the annular space region 416 'delimited by the piston rod 462 and the cylinder wall (411) forms the second Strut pressure chamber. From the head plate 463 of the hollow piston rod 462 two concentric tubes 464 and 466 extend, from which the tube 464 extends into the annular space 417 formed between the tubes 413, 414 extending from the cylinder base 412 and the tube 466 into the interior (414) of the tubes 413, 414 extending from the cylinder base 412. The end seals 424, 426 on the tubes extending from the cylinder base 412, which extend between the piston rod wall (462) and the tube extending from the head plate 463 of the piston rod 462 464 or between the tubes 464, 466 extending from the top plate 463, tubes 413, 414 form annular spaces 467, 468 between the top plate 463 and the seals 424, 426. The seal 424 on the end face of the outer (413) of the tubes 413, 414 extending from the cylinder base 412 further forms an annular space 422 together with the strut piston 461. A seal 469 on the front side of the outer (464) of the tubes 464, 466 extending from the head plate 463 of the piston rod 462 and extending between the tubes 413, 414 extending from the cylinder base 412 forms together with the one on the front side of the inner (414) of the tubes 423, 414 extending from the cylinder base 412 located an seal 426 from an annular space 423.
Die Druckräume 416, 416' des Federbeins liegen über die Anschlüsse 432 und 473 an einem Speicher, im Falle eines Arbeitszylinders an einer Pumpe. Der Anschluß 473 für den Druckraum 416' führt sich im dargestellten Fall in der dick¬ wandig ausgelegten Wandung in der Kolbenstange 462. Die erste Durchführung wird vom inneren (414) der vom Zylinder¬ boden 412 ausgehenden Rohre 413, 414 mit dem Anschluß 429 und vom inneren (466) der von der Kopfplatte 463 ausgehenden Rohre 464, 466 mit dem Anschluß 472 gebildet. Die zweite Durchführung verläuft durch den zwischen den vom Zylinder¬ boden 412 ausgehenden Rohren 413, 414 ausgebildeten Ringraum 417, der durchgängig (427) ist zum zwischen dem äußeren (413) der vom Zylinderboden 412 ausgehenden Rohre 413, 414 und der Kolbenstangenwandung (462) ausgebildeten Ringraum 423, an dem der von der Kopfplatte 463 der Kolbenstange 462 ausgehende, sich durch die dickwandige Wandung der Kolben¬ stange 462 erstreckende Anschluß 471 liegt. Der zwischen dem inneren (414) der vom Zylinderboden 412 ausgehenden Rohre 413, 414 und dem äußeren (464) der von der Kopfplatte 463 der Kolbenstange 462 ausgehenden Rohre 464, 466 ausgebildete Ringraum 423 ist durchgängig (428) zur vom inneren (414) der vom Zylinderboden 412 ausgehenden Rohre 413, 414 und vom inneren (466) der von der Kopfplatte 463 der Kolbenstange 462 ausge-henden Rohre 464, 466 ausgebildeten Durchführung.The pressure chambers 416, 416 'of the shock absorber are connected to a reservoir via the connections 432 and 473, in the case of a working cylinder to a pump. The connection 473 for the pressure chamber 416 'leads in the case shown in the thick-walled wall in the piston rod 462. The first passage is from the inner (414) of the tubes 413, 414 extending from the cylinder bottom 412 with the connection 429 and formed by the inner (466) of the tubes 464, 466 extending from the head plate 463 with the connection 472. The second passage runs through the annular space 417 formed between the tubes 413, 414 extending from the cylinder base 412, which is continuous (427) to between the outer (413) of the tubes 413, 414 extending from the cylinder base 412 and the piston rod wall (462) formed annular space 423, on which the piston rod 462 outgoing connection 471, which extends through the thick-walled wall of the piston rod 462. The annular space 423 formed between the inner (414) of the tubes 413, 414 extending from the cylinder base 412 and the outer (464) of the tubes 464, 466 extending from the head plate 463 of the piston rod 462 is continuous (428) to the interior (414) of the Pipes 413, 414 extending from the cylinder base 412 and from the inside (466) of the passage 464, 466 formed by the head plate 463 of the piston rod 462.
Funktionswesentlich im Sinne einer Neutralisierung des Drucks des den Radnabenmotor beaufschlagenden Öls gegenüber dem Federbein ist, daß die einander gegenüberliegenden Druckangriffsflächen in den Durchführungen für das den Motor beaufschlagende öl flächengleich sind. Diese Flächen sind in der Zeichnung durch Pfeile gekennzeichnet. Essential to the function of neutralizing the pressure of the oil acting on the wheel hub motor with respect to the spring strut is that the opposing pressure application surfaces in the bushings for the oil acting on the motor are of equal area. These areas are indicated by arrows in the drawing.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5512074A JPH06506423A (en) | 1992-01-16 | 1993-01-15 | One-stage actuation cylinder at specific spring legs |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4200977.4 | 1992-01-16 | ||
| DE19924200977 DE4200977A1 (en) | 1992-01-16 | 1992-01-16 | SHOCK ABSORBER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993013954A1 true WO1993013954A1 (en) | 1993-07-22 |
Family
ID=6449618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1993/000029 Ceased WO1993013954A1 (en) | 1992-01-16 | 1993-01-15 | Single-stage piston/cylinder unit, in particular a shock-absorber strut |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0575593A1 (en) |
| JP (1) | JPH06506423A (en) |
| DE (1) | DE4200977A1 (en) |
| WO (1) | WO1993013954A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0607545A1 (en) * | 1992-12-02 | 1994-07-27 | Öhlins Racing Ab | Shock absorber |
| JP3151354B2 (en) | 1994-04-15 | 2001-04-03 | コンパクト トラック アーゲー | Device for driving and steering the wheels of a car |
| US20110162928A1 (en) * | 2010-01-04 | 2011-07-07 | Wilson Kelce S | Super-Compressible Piston Shock Absorber |
| US20120306133A1 (en) * | 2011-06-06 | 2012-12-06 | Douglas Hunter Powell | Long travel shock absorber |
| FR3028459A1 (en) * | 2014-11-18 | 2016-05-20 | Laurent Eugene Albert | METHOD FOR SUPPLYING A HYDRAULIC ENGINE AND A CYLINDER SUSPENSION COMPRISING A COMPENSATING CHAMBER RELATING THERETO |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60018956T2 (en) * | 2000-12-29 | 2006-03-23 | Mando Corp. | Twin-tube vibration damper filled with hydraulic fluid and magnetorheological fluid |
| US6360856B1 (en) | 2001-01-05 | 2002-03-26 | Mando Corporation | Double-tube shock absorber using a hydraulic fluid and a magnetorheological fluid |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1120290B (en) * | 1959-01-14 | 1961-12-21 | Max Adolf Mueller Dipl Ing | Wheel suspension for vehicles, especially heavy-duty vehicles |
| US3225855A (en) * | 1963-04-30 | 1965-12-28 | Prime Movers Wiltshire Ltd | Swivel mountings for fluid-driven steerable vehicle wheels |
| FR1513396A (en) * | 1965-12-07 | 1968-02-16 | Acec | Electric steering wheel with independent suspension |
| DE2609924A1 (en) * | 1975-03-14 | 1976-09-30 | Teijin Seiki Co Ltd | DRIVE DEVICE |
| FR2530763A1 (en) * | 1982-07-22 | 1984-01-27 | Messier Hispano Sa | Retractable damper. |
| DE3942106A1 (en) * | 1989-12-20 | 1991-06-27 | Hemscheidt Maschf Hermann | Hydropneumatic piston-cylinder for vehicle suspension - makes use of movable cylinder free from mechanical stresses |
-
1992
- 1992-01-16 DE DE19924200977 patent/DE4200977A1/en not_active Ceased
-
1993
- 1993-01-15 JP JP5512074A patent/JPH06506423A/en active Pending
- 1993-01-15 WO PCT/DE1993/000029 patent/WO1993013954A1/en not_active Ceased
- 1993-01-15 EP EP19930902030 patent/EP0575593A1/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1120290B (en) * | 1959-01-14 | 1961-12-21 | Max Adolf Mueller Dipl Ing | Wheel suspension for vehicles, especially heavy-duty vehicles |
| US3225855A (en) * | 1963-04-30 | 1965-12-28 | Prime Movers Wiltshire Ltd | Swivel mountings for fluid-driven steerable vehicle wheels |
| FR1513396A (en) * | 1965-12-07 | 1968-02-16 | Acec | Electric steering wheel with independent suspension |
| DE2609924A1 (en) * | 1975-03-14 | 1976-09-30 | Teijin Seiki Co Ltd | DRIVE DEVICE |
| FR2530763A1 (en) * | 1982-07-22 | 1984-01-27 | Messier Hispano Sa | Retractable damper. |
| DE3942106A1 (en) * | 1989-12-20 | 1991-06-27 | Hemscheidt Maschf Hermann | Hydropneumatic piston-cylinder for vehicle suspension - makes use of movable cylinder free from mechanical stresses |
Non-Patent Citations (1)
| Title |
|---|
| TECHNISCHE MITTEILUNGEN KRUPP Nr. 1, Juni 1989, ESSEN, DE Seiten 29 - 36 WEISKOPF H. 'INDEPENDENT SUSPENSION : A NEW WAY FORWARD IN MOBILE CRANE DESIGN' * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0607545A1 (en) * | 1992-12-02 | 1994-07-27 | Öhlins Racing Ab | Shock absorber |
| JP3151354B2 (en) | 1994-04-15 | 2001-04-03 | コンパクト トラック アーゲー | Device for driving and steering the wheels of a car |
| US20110162928A1 (en) * | 2010-01-04 | 2011-07-07 | Wilson Kelce S | Super-Compressible Piston Shock Absorber |
| US20120306133A1 (en) * | 2011-06-06 | 2012-12-06 | Douglas Hunter Powell | Long travel shock absorber |
| US8714321B2 (en) * | 2011-06-06 | 2014-05-06 | Douglas Hunter Powell | Long travel shock absorber |
| FR3028459A1 (en) * | 2014-11-18 | 2016-05-20 | Laurent Eugene Albert | METHOD FOR SUPPLYING A HYDRAULIC ENGINE AND A CYLINDER SUSPENSION COMPRISING A COMPENSATING CHAMBER RELATING THERETO |
| FR3028458A1 (en) * | 2014-11-18 | 2016-05-20 | Laurent Eugene Albert | METHOD FOR SUPPLYING A HYDRAULIC MOTOR WHEEL TO A HYDRAULIC FLUID, A CYLINDER SUSPENSION THEREFOR, AND A VEHICLE THUS EQUIPPED |
| WO2016078917A1 (en) * | 2014-11-18 | 2016-05-26 | Albert Laurent Eugène | Method of supplying a hydraulic motor for a drive wheel with hydraulic fluid, associated cylinder-type suspension system and vehicle equipped therewith |
| US10421331B2 (en) | 2014-11-18 | 2019-09-24 | Laurent Eugène ALBERT | Method of supplying a hydraulic motor for a drive wheel with hydraulic fluid, associated cylinder-type suspension system and vehicle equipped therewith |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4200977A1 (en) | 1993-07-22 |
| EP0575593A1 (en) | 1993-12-29 |
| JPH06506423A (en) | 1994-07-21 |
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