WO2001056863A1 - Rack and pinion steering gear - Google Patents

Rack and pinion steering gear Download PDF

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Publication number
WO2001056863A1
WO2001056863A1 PCT/EP2001/000959 EP0100959W WO0156863A1 WO 2001056863 A1 WO2001056863 A1 WO 2001056863A1 EP 0100959 W EP0100959 W EP 0100959W WO 0156863 A1 WO0156863 A1 WO 0156863A1
Authority
WO
WIPO (PCT)
Prior art keywords
rack
steering gear
pinion steering
steering
clamp
Prior art date
Application number
PCT/EP2001/000959
Other languages
German (de)
French (fr)
Inventor
Jürgen BIEBER
Axel GÄRTNER
Original Assignee
Zf Lenksysteme Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zf Lenksysteme Gmbh filed Critical Zf Lenksysteme Gmbh
Priority to AU40560/01A priority Critical patent/AU4056001A/en
Publication of WO2001056863A1 publication Critical patent/WO2001056863A1/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
    • B62D5/062—Details, component parts

Definitions

  • the invention relates to a rack and pinion steering gear according to the kind defined in the preamble of claim 1.
  • DE 42 32 570 Cl describes a rotary slide valve for a hydraulic power steering device in which a valve housing is connected via screws to a steering gear of a power assisted rack and pinion steering.
  • the rack and pinion steering gear described in DE 42 32 570 Cl has the disadvantage, however, that fastening with screws places increased assembly effort and higher demands on the machining of the parts to be screwed.
  • the housings to be connected must have flanges that must be machined precisely.
  • the contact surfaces of the flanges must match each other exactly so that the components are not jammed during assembly.
  • the flanges themselves have to withstand high loads and are therefore often generously dimensioned. This can lead to problems with the available installation space and the total weight of the rack and pinion steering gear.
  • the present invention has for its object to provide a rack and pinion steering gear that with simplified assembly of the steering valve and mechanical base at the same time brings advantages in terms of installation space and weight.
  • the clamp can be made of cast metal, sheet metal or plastic, depending on the type and height of the load. To dampen vibrations that may lead to rattling noises between the steering valve and the mechanical substructure, the clamp can be coated with a damping material.
  • the form clamp can be tensioned by various mechanisms. For example, clamping devices in the form of brackets, screws, bolts or sleeves can be used, which can also be spring-loaded.
  • Fig. 1 shows an embodiment of a rack and pinion steering gear
  • FIG. 2 shows a partial section through the rack and pinion steering gear shown in FIG. 1.
  • FIG. 1 shows a rack and pinion steering gear for motor vehicles, in which a drive pinion 2 is rotatably mounted in bearings 3 and 4 in a steering housing 1. At one end of the drive pinion 2 there is a steering spindle connection 5. The drive pinion 2 is in engagement with a toothed rack 6 via its toothing, which is guided axially displaceably in the steering housing.
  • a servo motor 7 is used for auxiliary power support, the piston rod 8 of which is firmly connected to the toothed rack 6.
  • the servomotor 7 contains two working spaces 11 and 12 in a cylinder 10, which are separated from one another by a piston 13 fixed on the piston rod 8. The two working spaces 11 and 12 are connected via working lines 14 and 15 to two cylinder ports 16 and 17 of a steering valve 18.
  • the steering valve 18 also has an inlet connection 20 to which a pressure source 21 in the form of a servo pump is connected.
  • a pressure medium container 23 is connected to a return connection 22.
  • the working lines 14 and 15 are connected to the cylinder 10 via two connections 24 and 25. 2, the steering housing 1 is firmly connected to a housing 26 of the steering valve 18 by means of a clamp 27.
  • a bearing 28 serves to support the steering housing 1 and the housing 26.
  • the bearing 28 has no inner ring, since the drive pinion 2 takes over this function.

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

Abstract

A rack and pinion steering gear for motor vehicles, comprising a steering valve (18) and a steering housing (1) which are connected to each other by means of a molded clamp (27).

Description

Zahnstangen-Lenkgetriebe Rack and pinion steering gear
Die Erfindung betrifft ein Zahnstangen-Lenkgetriebe nach der im Oberbegriff von Anspruch 1 näher definierten Art.The invention relates to a rack and pinion steering gear according to the kind defined in the preamble of claim 1.
Bei den herkömmlichen Zahnstangen-Lenkgetrieben ist es üblich, daß ein Ventil mit einem mechanischen Unterbau über Schrauben verbunden ist.In the conventional rack and pinion steering gear, it is common for a valve to be connected to a mechanical substructure by means of screws.
In der DE 42 32 570 Cl ist ein Drehschieberventil für eine hydraulische Servolenkeinrichtung beschrieben, bei der ein Ventilgehäuse über Schrauben mit einem Lenkgetriebe einer servounterstützten Zahnstangenlenkung verbunden ist.DE 42 32 570 Cl describes a rotary slide valve for a hydraulic power steering device in which a valve housing is connected via screws to a steering gear of a power assisted rack and pinion steering.
Das in der DE 42 32 570 Cl beschriebene Zahnstangen- Lenkgetriebe weist jedoch den Nachteil auf, daß die Befestigung mit Schrauben einen erhöhten Montageaufwand und höhere Anforderungen an die Bearbeitung der zu verschraubenden Teile stellt. So müssen die zu verbindenden Gehäuse Flansche aufweisen, die genau bearbeitet werden müssen. Die Auflageflächen der Flansche müssen exakte zueinander passen, damit es bei der Montage nicht zum Verklemmen der Bau- teile kommt. Die Flansche selbst müssen hohen Belastungen standhalten und sind deshalb häufig großzügig dimensioniert. Dies kann zu Problemen mit dem vorhandenen Einbauraum und dem Gesamtgewicht des Zahnstangen-Lenkgetriebes führen.The rack and pinion steering gear described in DE 42 32 570 Cl has the disadvantage, however, that fastening with screws places increased assembly effort and higher demands on the machining of the parts to be screwed. For example, the housings to be connected must have flanges that must be machined precisely. The contact surfaces of the flanges must match each other exactly so that the components are not jammed during assembly. The flanges themselves have to withstand high loads and are therefore often generously dimensioned. This can lead to problems with the available installation space and the total weight of the rack and pinion steering gear.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Zahnstangen-Lenkgetriebe darzustellen, daß bei vereinfachter Montage von Lenkventil und mechanischem Unterbau gleichzeitig Vorteile hinsichtlich Bauraum und Gewicht mit sich bringt.The present invention has for its object to provide a rack and pinion steering gear that with simplified assembly of the steering valve and mechanical base at the same time brings advantages in terms of installation space and weight.
Die der Erfindung zugrundeliegende Aufgabe wird durch ein, auch die kennzeichnenden Merkmale des Hauptanspruchs aufweisendes, gattungsgemäßes Zahnstangen-Lenkgetriebe gelöst.The object on which the invention is based is achieved by a rack-and-pinion steering gear of the generic type, which also has the characterizing features of the main claim.
Durch die Verwendung einer Formschelle zur Verbindung von Lenkventil und mechanischem Unterbau kann auf die Verwendung von Schrauben ganz verzichtet werden. Die zu verbindenden Teile müssen nicht so aufwendig bearbeitet werden und benötigen auch keine Flansche. Dies bedeutet Gewichtsersparnis bei gleichzeitiger Reduzierung des notwendigen Einbauraums.The use of a clamp to connect the steering valve and the mechanical substructure means that there is no need to use screws. The parts to be connected do not have to be processed so laboriously and do not require any flanges. This means saving weight while reducing the necessary installation space.
Die Formschelle kann aus Metallguß, Blech oder Kunststoff sein, je nach Belastungsart und -höhe. Zur Dämpfung von auftretenden Schwingungen, die zu Klappergeräuschen zwischen dem Lenkventil und dem mechanischen Unterbau führen können, kann die Formschelle mit einem dämpfenden Material beschichtet werden. Die Formschelle kann durch verschiedene Mechanismen gespannt werden. So sind beispielsweise Spannmittel in Form von Bügeln, Schrauben, Bolzen oder Hülsen anwendbar, die zusätzlich federbelastet sein können.The clamp can be made of cast metal, sheet metal or plastic, depending on the type and height of the load. To dampen vibrations that may lead to rattling noises between the steering valve and the mechanical substructure, the clamp can be coated with a damping material. The form clamp can be tensioned by various mechanisms. For example, clamping devices in the form of brackets, screws, bolts or sleeves can be used, which can also be spring-loaded.
Vorteilhafte und zweckmäßige Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben. Die Erfindung ist aber nicht auf die Merkmalskombinationen der .Ansprüche beschränkt, vielmehr ergeben sich für den Fachmann weitere sinnvolle Kombinationsmöglichkeiten von Ansprüchen und einzelnen Anspruchsmerkmalen aus der Aufgabenstellung. Nachfolgend sind anhand der Figuren verschiedene Ausführungsbeispiele der vorliegenden Erfindung prinzipgemäß beschrieben. Es zeigen:Advantageous and expedient refinements of the invention are specified in the subclaims. However, the invention is not limited to the combinations of features of the claims. Rather, for the person skilled in the art there are further useful possible combinations of claims and individual claim features from the task. Various exemplary embodiments of the present invention are described in principle below with reference to the figures. Show it:
Fig. 1 ein Ausführungsbeispiel eines Zahnstangen- Lenkgetriebes undFig. 1 shows an embodiment of a rack and pinion steering gear
Fig. 2 einen Teilschnitt durch das in Fig. 1 darge- stellte Zahnstangen-Lenkgetriebe.2 shows a partial section through the rack and pinion steering gear shown in FIG. 1.
In der Fig. 1 ist ein Zahnstangen-Lenkgetriebe für Kraftfahrzeuge dargestellt, bei dem ein Antriebsritzel 2 in einem Lenkgehäuse 1 in Lagern 3 und 4 drehbar gelagert ist. Am einen Ende des Antriebsritzel 2 befindet sich ein Lenkspindelanschluß 5. Das Antriebsritzel 2 steht über seine Verzahnung im Eingriff mit einer Zahnstange 6, die in dem Lenkgehäuse axial verschiebbar geführt ist. Zur Hilfskraftunterstützung dient ein Servomotor 7, dessen Kolbenstange 8 fest mit der Zahnstange 6 verbunden ist. Der Servomotor 7 enthält in einem Zylinder 10 zwei Arbeitsräume 11 und 12, die durch einen auf der Kolbenstange 8 festliegenden Kolben 13 voneinander getrennt sind. Die beiden Arbeitsräume 11 und 12 sind über Arbeitsleitungen 14 und 15 mit zwei Zylinderanschlüssen 16 und 17 eines Lenkventils 18 verbunden. Das Lenkventil 18 weist außerdem noch einen Zulaufan- schluß 20 auf, an den eine Druckquelle 21 in Form einer Servopumpe angeschlossen ist. An einen Rücklaufanschluß 22 ist ein Druckmittelbehälter 23 angeschlossen. Die Arbeits- leitungen 14 und 15 sind über zwei Anschlüsse 24 und 25 mit dem Zylinder 10 verbunden. In der Fig. 2 ist das Lenkgehäuse 1 mit einem Gehäuse 26 des Lenkventils 18 über eine Formschelle 27 fest verbunden.1 shows a rack and pinion steering gear for motor vehicles, in which a drive pinion 2 is rotatably mounted in bearings 3 and 4 in a steering housing 1. At one end of the drive pinion 2 there is a steering spindle connection 5. The drive pinion 2 is in engagement with a toothed rack 6 via its toothing, which is guided axially displaceably in the steering housing. A servo motor 7 is used for auxiliary power support, the piston rod 8 of which is firmly connected to the toothed rack 6. The servomotor 7 contains two working spaces 11 and 12 in a cylinder 10, which are separated from one another by a piston 13 fixed on the piston rod 8. The two working spaces 11 and 12 are connected via working lines 14 and 15 to two cylinder ports 16 and 17 of a steering valve 18. The steering valve 18 also has an inlet connection 20 to which a pressure source 21 in the form of a servo pump is connected. A pressure medium container 23 is connected to a return connection 22. The working lines 14 and 15 are connected to the cylinder 10 via two connections 24 and 25. 2, the steering housing 1 is firmly connected to a housing 26 of the steering valve 18 by means of a clamp 27.
Ein Lager 28 dient zur Lagerung des Lenkgehäuses 1 und des Gehäuses 26. Das Lager 28 weist keinen Innenring auf, da das Antriebsritzel 2 diese Funktion übernimmt. A bearing 28 serves to support the steering housing 1 and the housing 26. The bearing 28 has no inner ring, since the drive pinion 2 takes over this function.
Bezugszeichenreference numeral
1 Lenkgehäuse1 steering housing
2 .Antriebsritzel2. Drive pinion
3 Lager3 bearings
4 Lager4 bearings
5 Lenkspindelanschluß5 steering spindle connection
6 Zahnstange6 rack
7 Servomotor7 servo motor
8 Kolbenstange8 piston rod
9 -9 -
10 Zylinder10 cylinders
11 Arbeitsraum11 work space
12 Arbeitsraum12 work space
13 Kolben13 pistons
14 Arbeitsleitung14 work management
15 Arbeitsleitung15 work management
16 Zylinderanschluß16 cylinder connection
17 Zylinderanschluß17 cylinder connection
18 Lenkventil18 steering valve
19 -19 -
20 Zulaufanschluß20 inlet connection
21 Druckquelle21 pressure source
22 Rücklaufanschluß22 return connection
23 Druckmittelbehälter23 pressure medium container
24 Anschluß24 connection
25 Anschluß25 connection
26 Gehäuse26 housing
27 Formschelle 27 molded clamp

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Zahnstangen-Lenkgetriebe für Kraftfahrzeuge, mit einem Lenkventil (18) und einem Lenkgehäuse (1), dadurch g e k e n n z e i c h n e t , daß das Lenkventil (18) und das Lenkgehäuse (1) durch eine Formschelle (27) miteinander verbunden sind.1. Rack-and-pinion steering gear for motor vehicles, with a steering valve (18) and a steering housing (1), characterized in that the steering valve (18) and the steering housing (1) are connected to one another by means of a clamp (27).
2. Zahnstangen-Lenkgetriebe nach Anspruch 1, dadurch g e k e n n z e i c h n e t , daß die Formschelle (27) als Guß-, Blech- oder Kunststoffteil ausgebildet ist.2. Rack-and-pinion steering gear according to claim 1, characterized g e k e n n z e i c h n e t that the molded clamp (27) is designed as a cast, sheet metal or plastic part.
3. Zahnstangen-Lenkgetriebe nach Anspruch 1, dadurch g e k e n n z e i c h n e t , daß die Formschelle (27) über einen Spannbügel geschlossen wird.3. Rack and pinion steering gear according to claim 1, characterized g e k e n n z e i c h n e t that the clamp (27) is closed via a clamping bracket.
4. Zahnstangen-Lenkgetriebe nach Anspruch 1, dadurch g e k e n n z e i c h n e t , daß die Formschelle (27) durch ein Verbindungselement geschlossen wird.4. Rack and pinion steering gear according to claim 1, characterized g e k e n n z e i c h n e t that the clamp (27) is closed by a connecting element.
5. Zahnstangen-Lenkgetriebe nach Anspruch 1, dadurch g e k e n n z e i c h n e t , daß die Formschelle (27) beschichtet ist.5. rack and pinion steering gear according to claim 1, characterized g e k e n n z e i c h n e t that the clamp (27) is coated.
6. Zahnstangen-Lenkgetriebe nach Anspruch 3 oder 4, dadurch g e k e n n z e i c h n e t , daß der Spannbügel bzw. das Verbindungselement federnd ausgeführt ist, um Toleranzen bzw. Setzerscheinungen und damit verbundene Vor- spannkraftverluste auszugleichen. 6. Rack and pinion steering gear according to claim 3 or 4, characterized g e k e n n z e i c h n e t that the clamping bracket or the connecting element is resilient to compensate for tolerances or settling phenomena and associated loss of preload.
PCT/EP2001/000959 2000-02-03 2001-01-30 Rack and pinion steering gear WO2001056863A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU40560/01A AU4056001A (en) 2000-02-03 2001-01-30 Rack and pinion steering gear

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10004709.2 2000-02-03
DE2000104709 DE10004709A1 (en) 2000-02-03 2000-02-03 Rack-and-pinion steering transmission, steering valve and steering casing of which are connected to each other by molded clamp

Publications (1)

Publication Number Publication Date
WO2001056863A1 true WO2001056863A1 (en) 2001-08-09

Family

ID=7629681

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/000959 WO2001056863A1 (en) 2000-02-03 2001-01-30 Rack and pinion steering gear

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AU (1) AU4056001A (en)
DE (1) DE10004709A1 (en)
WO (1) WO2001056863A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016220641A1 (en) * 2016-10-20 2018-04-26 Continental Automotive Gmbh Fuel pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2161962A1 (en) * 1971-12-14 1973-06-20 Langen & Co HYDRAULIC POWER STEERING DEVICE
FR2509246A1 (en) * 1981-07-08 1983-01-14 Valeo Power assisted steering for vehicle - has control detector valve mounted on steering housing by resilient grips
DE3807573A1 (en) * 1987-03-09 1988-09-29 Gen Motors Corp ROTARY VALVE-RACK-POWER-STEERING GEARBOX

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122151B (en) * 1982-06-18 1986-06-25 Cam Gears Ltd Power assisted steering gear
DE4232570C1 (en) * 1992-09-29 1994-03-31 Volkswagen Ag Rotary slide valve for hydraulic servo steering unit - has engaging cylinder body and rotary disc with control edges on contacting surfaces and separated sealed groove on body surface
JPH0872733A (en) * 1994-09-08 1996-03-19 Kayaba Ind Co Ltd Power steering device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2161962A1 (en) * 1971-12-14 1973-06-20 Langen & Co HYDRAULIC POWER STEERING DEVICE
FR2509246A1 (en) * 1981-07-08 1983-01-14 Valeo Power assisted steering for vehicle - has control detector valve mounted on steering housing by resilient grips
DE3807573A1 (en) * 1987-03-09 1988-09-29 Gen Motors Corp ROTARY VALVE-RACK-POWER-STEERING GEARBOX

Also Published As

Publication number Publication date
DE10004709A1 (en) 2001-08-09
AU4056001A (en) 2001-08-14

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