WO1984002889A1 - Rotary slide valve for hydraulic servo steerings - Google Patents

Rotary slide valve for hydraulic servo steerings Download PDF

Info

Publication number
WO1984002889A1
WO1984002889A1 PCT/EP1983/000251 EP8300251W WO8402889A1 WO 1984002889 A1 WO1984002889 A1 WO 1984002889A1 EP 8300251 W EP8300251 W EP 8300251W WO 8402889 A1 WO8402889 A1 WO 8402889A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
rotary slide
rotary
valve sleeve
side walls
Prior art date
Application number
PCT/EP1983/000251
Other languages
German (de)
French (fr)
Inventor
Helmut Bareis
Original Assignee
Zahnradfabrik Friedrichshafen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zahnradfabrik Friedrichshafen filed Critical Zahnradfabrik Friedrichshafen
Priority to AU20317/83A priority Critical patent/AU2031783A/en
Publication of WO1984002889A1 publication Critical patent/WO1984002889A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
    • B62D5/083—Rotary valves

Definitions

  • a rotary slide valve according to the preamble of claim 1 is already known from DE-OS 21 52 776.
  • Such a valve is composed of a valve sleeve and a rotary valve guided in it.
  • the valve sleeve and the rotary slide valve are provided with mutually facing axial grooves and are elastically coupled to one another by a torsion bar.
  • the valve sleeve is integrally formed with a pinion engaging in a rack.
  • the rotary valve is connected to a steering handwheel via the steering spindle.
  • the rotary slide valve undergoes an elastic relative rotation due to the action of the torsion bar within a predetermined control path with respect to the valve sleeve, a pressure oil flow taking place via the axial grooves to a working cylinder supporting the steering force.
  • wedges are provided on the rotary valve and on the valve sleeve, which allow the relative rotation by a so-called play seat and then rigidly connect the two valve parts to one another after overcoming the control path.
  • Such a limitation of the control path via wedges or a correspondingly designed toothing is complex to manufacture and therefore expensive.
  • Another rotary slide valve with a pinion made in one piece with the valve sleeve (DE-OS 17 55438) has a groove forming stops to limit the control path on the valve sleeve, into which projections provided on the rotary slide engage.
  • Such projections which are arranged approximately in the axial center of the rotary valve, can only be produced with considerable manufacturing effort.
  • a radial breakthrough is incorporated into the valve sleeve by broaching or bumping, so that flat side walls are created.
  • the rotary valve also has two claws which protrude into the opening and which, after having overcome the intended control path S, come to rest on the side walls.
  • rotary slide valves which are integral with a drive element, for. B. a pinion, manufactured valve sleeve to create a reliable control path limitation with relatively little manufacturing effort.
  • the invention is also advantageously applicable in ball nut hydraulic steering systems, e.g. B. according to DE-PS 29 13 484, in which the valve sleeve is made in one piece with a threaded spindle engaging in the working piston.
  • valve sleeve 1 is a partial longitudinal section of a valve sleeve with a pinion made from one piece
  • FIG. 2 shows a partial section according to FIG. 1, but rotated by 90 °
  • FIG. 5 shows a section along the line V-V in Fig. 4th
  • the drive element which is designed as a pinion 1 engages in a rack (not shown) and the valve sleeve 2 are made in one piece.
  • the valve sleeve 2 has a number of axial grooves 4 in its bore 3 for the pressure oil distribution.
  • the rotary valve 5 shown in FIG. 3 is provided with a corresponding number of axial grooves 6.
  • the rotary valve 5 is mounted in the valve sleeve 2, so that the axial grooves 4 and 6 are opposite each other, which cooperate to control the pressure oil in a known manner.
  • the rotary valve 5 is connected to a steering handwheel via a steering spindle, not shown.
  • the valve sleeve 2 or the pinion 1 and the rotary valve 5 are coupled to one another via a torsion bar 7.
  • the two torsion bar ends are secured by pins 8 and 10 in the two parts of the rotary valve.
  • the torsion bar 7 has the task of returning the rotary slide valve 2, 5 to the hydraulic center after completion of the steering process.
  • a radial opening 11 with preferably flat side walls 12 and 13 is formed in the valve sleeve 2 by broaching incorporated.
  • a guide hole is drilled that is slightly smaller than the radius R.
  • claws 14 and 15 provided on the rotary valve 5 project into the opening 11 with a certain torsional play.
  • the pressure oil control takes place in a known manner within this backlash or control path S.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

A rotary slide valve for hydraulic servo steerings is comprised of a one piece valve sleeve (2) with for example a pignon (1) and of a rotary slide (5) which may have a limited rotation about a predetermined angled path. The valve sleeve (2) and the rotary slide are elastically interconnected by means of a rotary rod (7). Once the elastic relative torsion (control travel) is terminated, both parts of the rotary slide are securingly coupled by means of a stop. Said stop is shaped as a hole (11) with preferably planar side walls (12 and 13) wherein claws (14, 15) provided on the rotary slide (5) may move forward. After having overcome the predetermined control travel (S), the claws (14, 15) come to a position on the side walls (12, 13), thereby enabling a direct transfer of the steering force from the steering wheel to the pinion (1).

Description

Drehschieberventil für hydraulische Hilfskraftlenkungen Rotary slide valve for hydraulic power steering
Ein Drehschieberventil nach dem Oberbegriff des Anspruches 1 ist bereits aus der DE-OS 21 52 776 bekannt. Ein solches Ventil setzt sich zusammen aus einer Ventilbüchse und einem in dieser geführten Drehschieber. Die Ventilbüchse und der Drehschieber sind zur Steuerung des Drucköls mit einander zugewandten Axialnuten versehen und durch einen Drehstab elastisch miteinander gekuppelt. Die Ventilbüchse ist mit einem in eine Zahnstange eingreifenden Ritzel einstückig ausgebildet. Der Drehschieber steht über die Lenkspindel mit einem Lenkhandrad in Verbindung. Beim Drehen des Lenkhandrades erfährt der Drehschieber durch die Wirkung des Drehstabes innerhalb eines vorgegebenen Steuerweges gegenüber der Ventilbüchse eine elastische Relativverdrehung, wobei über die Axialnuten eine Druckölströmung zu einem die Lenkkraft unterstützenden Arbeitszylinder stattfindet. Zur Begrenzung der Relativverdrehung sind am Drehschieber und an der Ventilhülse Keile vorgesehen, welche durch einen sogenannten Spielsitz die Relatiwerdrehung zulassen und anschließend nach Überwindung des Steuerweges die beiden Ventilteile starr miteinander verbinden. Eine derartige Begrenzung des Steuerweges über Keile oder eine entsprechend ausgelegte Verzahnung ist in der Herstellung aufwendig und daher teuer.A rotary slide valve according to the preamble of claim 1 is already known from DE-OS 21 52 776. Such a valve is composed of a valve sleeve and a rotary valve guided in it. To control the pressure oil, the valve sleeve and the rotary slide valve are provided with mutually facing axial grooves and are elastically coupled to one another by a torsion bar. The valve sleeve is integrally formed with a pinion engaging in a rack. The rotary valve is connected to a steering handwheel via the steering spindle. When the steering handwheel is turned, the rotary slide valve undergoes an elastic relative rotation due to the action of the torsion bar within a predetermined control path with respect to the valve sleeve, a pressure oil flow taking place via the axial grooves to a working cylinder supporting the steering force. To limit the relative rotation, wedges are provided on the rotary valve and on the valve sleeve, which allow the relative rotation by a so-called play seat and then rigidly connect the two valve parts to one another after overcoming the control path. Such a limitation of the control path via wedges or a correspondingly designed toothing is complex to manufacture and therefore expensive.
Ein weiteres Drehschieberventil mit einem mit der Ventilbüchse einstückig gefertigten Ritzel (DE-OS 17 55 438) weist zur Begrenzung des Steuerweges an der Ventilbüchse eine Anschläge bildende Nut auf, in welche am Drehschieber vorgesehene Vorsprünge eingreifen. Derartige, etwa in der axialen Mitte des Drehschiebers angeordnete Vorsprünge sind nur mit erheblichem Pertigungsaufwand herzustellen.Another rotary slide valve with a pinion made in one piece with the valve sleeve (DE-OS 17 55 438) has a groove forming stops to limit the control path on the valve sleeve, into which projections provided on the rotary slide engage. Such projections, which are arranged approximately in the axial center of the rotary valve, can only be produced with considerable manufacturing effort.
Es ist daher Aufgabe der Erfindung, für ein Drehschieberventil der angeführten Bauart eine möglichst einfache und daher kostengünstige Steuerweg-Begrenzung zu finden. Nach der Erfindung ist in die Ventilbüchse durch Räumen oder Stoßen ein radialer Durchbruch eingearbeitet, so daß ebene Seitenwände entstehen. Der Drehschieber weist weiterhin zwei in den Durchbruch hineinragende Klauen auf, die nach überwinden des vorgesehenen Steuerweges S an den Seitenwänden zur Anlage gelangen. Auf diese Weise ist es möglich, auch bei Drehschieberventilen, die eine einstückig mit einem Antriebselement, z. B. einem Ritzel, hergestellte Ventilbüchse aufweisen, mit verhältnismäßig geringem Fertigungsaufwand eine betriebssichere Steuerweg-Begrenzung zu schaffen. Selbstverständlich ist die Erfindung auch vorteilhaft anwendbar in Kugelmutter-Hydrolenkungen, z. B. nach der DE-PS 29 13 484, bei welcher die Ventilbüchse mit einer in den Arbeitskolben eingreifenden Gewindespindel einstückig hergestellt ist.It is therefore an object of the invention to find a simple and therefore inexpensive control path limitation for a rotary slide valve of the type mentioned. According to the invention, a radial breakthrough is incorporated into the valve sleeve by broaching or bumping, so that flat side walls are created. The rotary valve also has two claws which protrude into the opening and which, after having overcome the intended control path S, come to rest on the side walls. In this way it is possible, even with rotary slide valves, which are integral with a drive element, for. B. a pinion, manufactured valve sleeve to create a reliable control path limitation with relatively little manufacturing effort. Of course, the invention is also advantageously applicable in ball nut hydraulic steering systems, e.g. B. according to DE-PS 29 13 484, in which the valve sleeve is made in one piece with a threaded spindle engaging in the working piston.
Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:The invention is explained below with reference to an embodiment shown in the drawing. Show it:
Fig. 1 einen Teillängsschnitt einer Ventilbüchse mit einem aus einem Stück gefertigten Ritzel,1 is a partial longitudinal section of a valve sleeve with a pinion made from one piece,
Fig. 2 einen Teilschnitt nach Fig. 1, jedoch um 90° verdreht,2 shows a partial section according to FIG. 1, but rotated by 90 °,
Fig. 3 einen Drehschieber in Ansicht,3 a rotary valve in view,
Fig. 4 den Zusammenbau des Drehschieberventils im Schnitt bei weggelassenem Lenkgehäuse,4 shows the assembly of the rotary slide valve in section with the steering housing omitted,
Fig. 5 einen Schnitt nach der Linie V-V in Fig. 4.5 shows a section along the line V-V in Fig. 4th
Nach Fig. 1 sind das in eine Zahnstange (nicht dargestellt) eingreifende, als Ritzel 1 ausgeführte Antriebselement und die Ventilbüchse 2 einstückig ausgeführt. Die Ventilbüchse 2 weist in ihrer Bohrung 3 für die Druckölverteilung eine Anzahl Axialnuten 4 auf. Ebenso ist der in Fig. 3 dargestellte Drehschieber 5 mit einer entsprechenden Anzahl von Axialnuten 6 versehen. Wie Fig. 4 zeigt, ist der Drehschieber 5 in der Ventilbüchse 2 gelagert, so daß sich die Axialnuten 4 und 6 einander gegenüberliegen, die zur Steuerung des Drucköls in bekannter Weise zusammenwirken. Der Drehschieber 5 steht über eine nicht dargestellte Lenkspindel mit einem Lenkhandrad in Verbindung. Die Ventilbüchse 2 bzw. das Ritzel 1 und der Drehschieber 5 sind über einen Drehstab 7 miteinander gekuppelt. Hierzu sind die beiden Drehstabenden durch Stifte 8 und 10 in den beiden Teilen des Drehschiebers gesichert. Der Drehstab 7 hat die Aufgabe, das Drehschieberventil 2, 5 nach Beendigung des Lenkvorganges in die hydraulische Mitte zurückzuführen.According to FIG. 1, the drive element, which is designed as a pinion 1, engages in a rack (not shown) and the valve sleeve 2 are made in one piece. The valve sleeve 2 has a number of axial grooves 4 in its bore 3 for the pressure oil distribution. Likewise, the rotary valve 5 shown in FIG. 3 is provided with a corresponding number of axial grooves 6. Like Fig. 4 shows, the rotary valve 5 is mounted in the valve sleeve 2, so that the axial grooves 4 and 6 are opposite each other, which cooperate to control the pressure oil in a known manner. The rotary valve 5 is connected to a steering handwheel via a steering spindle, not shown. The valve sleeve 2 or the pinion 1 and the rotary valve 5 are coupled to one another via a torsion bar 7. For this purpose, the two torsion bar ends are secured by pins 8 and 10 in the two parts of the rotary valve. The torsion bar 7 has the task of returning the rotary slide valve 2, 5 to the hydraulic center after completion of the steering process.
Zur Begrenzung des Verdrehwinkels zwischen der Ventilbüchse 2 und dem Drehschieber 5 ist gemäß der Erfindung folgende Einrichtung vorgesehen: Wie am besten aus Fig. 1 und 2 ersichtlich, ist in die Ventilbüchse 2 durch Räumen ein radial verlaufender Durchbruch 11 mit vorzugsweise ebenen Seitenwänden 12 und 13 eingearbeitet. Dabei wird zur Erleichterung des eigentlichen Räumvorganges eine Führungsbohrung gebohrt, die geringfügig kleiner als der Radius R ist. Nach Fig. 4 und 5 ragen am Drehschieber 5 vorgesehene Klauen 14 und 15 mit einem bestimmten Verdrehspiel in den Durchbruch 11 hinein. Innerhalb dieses Verdrehspieles oder Steuerweges S erfolgt in bekannter Weise die Druckölsteuerung. Anlageflachen 16, 16A und 17, 17A der Klauen 15 bzw. 14 sind vorteilhaft leicht schräg ausgeführt, so daß diese nach überwinden des Steuerweges S mit der gesamten Fläche an den Seitenwänden 12 und 13 zur Anlage gelangen. Dies ist immer dann der Fall, wenn sich durch einen Defekt im hydraulischen Teil der Hilfskraftlenkung kein Druck im Arbeitszylinder aufbauen kann. In diesem Falle wird die Lenkkraft vom Lenkhandrad rein manuell über den Drehschieber 5 auf das Ritzel 1 übertragen. BezugszeichenTo limit the angle of rotation between the valve sleeve 2 and the rotary valve 5, the following device is provided according to the invention: As best seen in FIGS. 1 and 2, a radial opening 11 with preferably flat side walls 12 and 13 is formed in the valve sleeve 2 by broaching incorporated. In order to facilitate the actual broaching process, a guide hole is drilled that is slightly smaller than the radius R. According to FIGS. 4 and 5, claws 14 and 15 provided on the rotary valve 5 project into the opening 11 with a certain torsional play. The pressure oil control takes place in a known manner within this backlash or control path S. Contact surfaces 16, 16A and 17, 17A of the claws 15 and 14 are advantageously slightly inclined, so that after overcoming the control path S, the entire surface on the side walls 12 and 13 comes to rest. This is always the case when a defect in the hydraulic part of the power steering system means that no pressure can build up in the working cylinder. In this case, the steering force is transmitted from the steering handwheel to the pinion 1 purely manually via the rotary slide 5. Reference numerals
1 Ritzel1 pinion
2 Ventilbüchse2 valve bushings
3 Bohrung3 hole
4 Axialnuten4 axial grooves
5 Drehschieber5 rotary valves
6 Axialnuten6 axial grooves
7 Drehstab7 torsion bar
8 Stift8 pin
9 -9 -
10 Stift10 pen
11 Durchbruch11 breakthrough
12 Seitenwand12 side wall
13 Seitenwand13 side wall
14 Klaue14 claw
15 Klaue15 claw
16 Anlagefläche16 contact surface
16A Anlagefläche16A contact surface
17 Anlagefläche17 contact surface
17A Anlagefläche17A contact surface
R RadiusR radius
S Steuerweg S control route

Claims

A n s p r ü c h e Expectations
1. Drehschieberventil für hydraulische Hilfskraftlenkungen mit folgenden Merkmalen: - eine in einem Gehäuse gelagerte und mit einem Abtriebselement einstückig ausgebildete Ventilbüchse nimmt einen an ein Lenkhandrad angeschlossenen Drehschieber auf; - die Ventilbüchse und der Drehschieber sind mit Axialnuten zur Steuerung des Drucköls versehen;1. Rotary slide valve for hydraulic power steering systems with the following features: a valve sleeve mounted in a housing and integrally formed with an output element accommodates a rotary slide valve connected to a steering handwheel; - The valve sleeve and the rotary valve are provided with axial grooves for controlling the pressure oil;
- die Ventilbüchse und der Drehschieber sind über einen Drehstab elastisch miteinander verbunden;- The valve sleeve and the rotary valve are elastically connected to each other via a torsion bar;
- zwischen der Ventilbüchse und dem Drehschieber ist ein einen Steuerweg begrenzander Anschlag vorgesehen, durch den die elastische Verdrehung begrenzt und eine starre Verbindung zwischen den beiden Ventilorganen hergestellt ist, g e k e n n z e i c h n e t durch folgende Merkmale: - die Ventilbüchse (2) enthält zur Steuerwegbegrenzung einen durch Räumen oder Stoßen hergestellten radialen Durchbruch (11) mit im wesentlichen ebenen Seitenwänden (12, 13); - der Drehschieber (5) weist an seinem von der Ventilbüchse (2) umschlossenen Ende sich gegenüberliegende urd in den Durchbruch (11) hineinragende Klauen (14, 15) auf, die nach überwinden eines Steuerweges (S) an den als Anschlag wirkenden Seitenwänden (12, 13) anliegen.- Between the valve sleeve and the rotary valve a control path limiting stop is provided, by which the elastic rotation is limited and a rigid connection is established between the two valve elements, characterized by the following features: - The valve sleeve (2) contains a space for clearing the control path or Butting produced radial opening (11) with substantially flat side walls (12, 13); - The rotary slide valve (5) has at its end surrounded by the valve sleeve (2) opposite claws (14, 15) which protrude into the opening (11) and which, after having overcome a control path (S), act on the side walls acting as a stop ( 12, 13).
2. Drehschieberventil nach Anspruch 1, dadurch g e k e n n z e i c h n e t , daß die mit den Seitenwänden (12, 13) zusammenwirkenden Anlageflächen (16, 17 bzw. 16A, 17A) der Klauen (14, 15) schräg ausgeführt sind. 2. Rotary slide valve according to claim 1, characterized in that the contact surfaces (16, 17 or 16A, 17A) of the claws (14, 15), which cooperate with the side walls (12, 13), are designed obliquely.
PCT/EP1983/000251 1983-01-29 1983-09-28 Rotary slide valve for hydraulic servo steerings WO1984002889A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU20317/83A AU2031783A (en) 1983-01-29 1983-09-28 Drehschieberventil fur hydraulische hilfskraftlenkungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833303063 DE3303063C2 (en) 1983-01-29 1983-01-29 Rotary slide steering valve for hydraulic power steering for vehicles

Publications (1)

Publication Number Publication Date
WO1984002889A1 true WO1984002889A1 (en) 1984-08-02

Family

ID=6189593

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1983/000251 WO1984002889A1 (en) 1983-01-29 1983-09-28 Rotary slide valve for hydraulic servo steerings

Country Status (3)

Country Link
JP (1) JPS60500411A (en)
DE (1) DE3303063C2 (en)
WO (1) WO1984002889A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026574A1 (en) * 1993-05-13 1994-11-24 Zf Friedrichshafen Ag Sliding vane rotaty valve for assisted steering systems of motor vehicles
WO1997049596A1 (en) * 1996-06-26 1997-12-31 Bishop Steering Pty Ltd Slotted component and method of manufacture thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003295A1 (en) * 1988-09-17 1990-04-05 Zahnradfabrik Friedrichshafen Ag Rotary gate valve, in particular for servo-assisted steering systems in motor vehicles
DE4330338C1 (en) * 1993-09-08 1994-09-08 Daimler Benz Ag Fluid, in particular hydraulic servo control

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1152555A (en) * 1967-05-08 1969-05-21 Burman & Sons Ltd Hydraulically-Assisted Rack and Pinion Steering Gear
US3610105A (en) * 1968-04-26 1971-10-05 Toyoda Machine Works Ltd Power steering apparatus
DE2152766A1 (en) * 1970-10-22 1972-04-27 Imperial Chemical Industries Ltd , London Method for stretching a tow made from a synthetic polymer
EP0012043A1 (en) * 1978-10-27 1980-06-11 Societe Anonyme D.B.A. Hydraulic servosteering device for automotive vehicles
GB2046685A (en) * 1979-04-04 1980-11-19 Zahnradfabrik Friedrichshafen Power-assisted steering gear
GB2083424A (en) * 1980-09-17 1982-03-24 Jidosha Kiki Co Power steering apparatus
US4378030A (en) * 1979-07-30 1983-03-29 Ford Motor Company Power steering gear mechanism with rotary control valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT988705B (en) * 1973-03-16 1975-04-30 Powersteering Trust Reg IMPROVED POWER STEERING WITH ROTARY BUTOR DISTRES
BR7702273A (en) * 1976-04-12 1978-01-17 Trw Inc MOTOR STEERING DEVICE AND MANUFACTURING PROCESS OF A VALVE ELEMENT
GB2091181B (en) * 1980-12-19 1985-04-17 Jidosha Kiki Co Power steering apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1152555A (en) * 1967-05-08 1969-05-21 Burman & Sons Ltd Hydraulically-Assisted Rack and Pinion Steering Gear
US3610105A (en) * 1968-04-26 1971-10-05 Toyoda Machine Works Ltd Power steering apparatus
DE2152766A1 (en) * 1970-10-22 1972-04-27 Imperial Chemical Industries Ltd , London Method for stretching a tow made from a synthetic polymer
EP0012043A1 (en) * 1978-10-27 1980-06-11 Societe Anonyme D.B.A. Hydraulic servosteering device for automotive vehicles
GB2046685A (en) * 1979-04-04 1980-11-19 Zahnradfabrik Friedrichshafen Power-assisted steering gear
US4378030A (en) * 1979-07-30 1983-03-29 Ford Motor Company Power steering gear mechanism with rotary control valve
GB2083424A (en) * 1980-09-17 1982-03-24 Jidosha Kiki Co Power steering apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026574A1 (en) * 1993-05-13 1994-11-24 Zf Friedrichshafen Ag Sliding vane rotaty valve for assisted steering systems of motor vehicles
WO1997049596A1 (en) * 1996-06-26 1997-12-31 Bishop Steering Pty Ltd Slotted component and method of manufacture thereof
US6203258B1 (en) 1996-06-26 2001-03-20 Bishop Steering Pty Limited Slotted component and method of manufacture thereof
US6244799B1 (en) 1996-06-26 2001-06-12 Bishop Steering Pty Limited Slotted component and method of manufacture thereof

Also Published As

Publication number Publication date
JPS60500411A (en) 1985-03-28
DE3303063C2 (en) 1986-11-27
DE3303063A1 (en) 1984-08-09

Similar Documents

Publication Publication Date Title
EP0731885B1 (en) Gear shift device
WO2003029067A1 (en) Rack steering device
DE7332665U (en) POWER STEERING
DE3027212C2 (en) Hydraulic booster unit for auxiliary power support, in particular of motor vehicle steering systems
DE2214001B2 (en)
WO1984002889A1 (en) Rotary slide valve for hydraulic servo steerings
DE2913484A1 (en) AUXILIARY STEERING, ESPECIALLY FOR MOTOR VEHICLES
DE2638981C3 (en) Power steering, in particular for motor vehicles
DE3628360A1 (en) CONNECTING PIN FOR A POWER STEERING GEARBOX
DE3634215A1 (en) ROTARY VALVE, ESPECIALLY FOR AUXILIARY STEERING OF MOTOR VEHICLES
EP0644841B1 (en) Rotary slide valve for power assisted steering systems of motor vehicles
EP0132597A2 (en) Tie-rod articulation
EP0198824B1 (en) Hydraulic servo-steering, particularly for motor vehicles
DE2928100C2 (en)
DE3320001A1 (en) STEERING SYSTEM FOR A VEHICLE WITH STEERING FRONT AND REAR WHEELS
DE3028175C2 (en) Hydraulic power steering for motor vehicles
DE2739405C3 (en) Power steering gear
DE2233304C3 (en) Power-assisted rack and pinion steering for motor vehicles
DE2730135A1 (en) POWER-REINFORCED RACK STEERING GEAR
DE3035407C2 (en) Power steering for motor vehicles
EP1178911B1 (en) Rotary shift valve for servo-assisted steering systems of motor vehicles
DE2609784C3 (en) Power steering, in particular for motor vehicles
DE2630615C3 (en) Hydraulic power steering for vehicles
WO2000029272A2 (en) Method for mounting a rotary valve for power assisted steering systems, especially for motor vehicles
EP1058639B1 (en) Rotary disk valve for power steering systems of motor vehicles

Legal Events

Date Code Title Description
AK Designated states

Designated state(s): AU BR JP US

AL Designated countries for regional patents

Designated state(s): AT BE CH DE FR GB LU NL SE