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WO1998012097A1 - Dispositif de direction electriquement assistee - Google Patents

Dispositif de direction electriquement assistee Download PDF

Info

Publication number
WO1998012097A1
WO1998012097A1 PCT/CH1997/000326 CH9700326W WO9812097A1 WO 1998012097 A1 WO1998012097 A1 WO 1998012097A1 CH 9700326 W CH9700326 W CH 9700326W WO 9812097 A1 WO9812097 A1 WO 9812097A1
Authority
WO
WIPO (PCT)
Prior art keywords
steering
gear
motor
arrangement according
shaft
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
Application number
PCT/CH1997/000326
Other languages
German (de)
English (en)
Inventor
Peter Hirschauer
Daniel Brunnschweiler
Stefan Battlogg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Presta AG
Original Assignee
Krupp Presta AG
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 Krupp Presta AG filed Critical Krupp Presta AG
Priority to JP51411498A priority Critical patent/JP2001505507A/ja
Priority to EP97937394A priority patent/EP0927128A1/fr
Priority to AU40078/97A priority patent/AU4007897A/en
Publication of WO1998012097A1 publication Critical patent/WO1998012097A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0409—Electric motor acting on the steering column
    • B62D5/0412—Electric motor acting on the steering column the axes of motor and steering column being parallel
    • B62D5/0415—Electric motor acting on the steering column the axes of motor and steering column being parallel the axes being coaxial

Definitions

  • the invention relates to a steering arrangement according to the preamble of claim 1.
  • a steering arrangement with electrically assisted steering aid has become known from EP 0 411 600.
  • the force coupling of the servo motor takes place on the side of the steering wheel shaft or the steering spindle via a bevel gear.
  • a clutch is arranged between the electric motor on the side and the bevel gear.
  • sensors detect the position of the steering wheel shaft, which is processed by control electronics and which operates the servomotor in accordance with the desired servo function.
  • Electrically operated steering aids have the advantage over the known hydraulically operated steering aids that they require less drive energy and thus fuel savings of 5-10% are possible.
  • the desired power transmission characteristic can be realized better with electronic controls than with hydraulic devices.
  • the known electrically operated steering aids have the disadvantage that they require a relatively large amount of installation space.
  • the object of the present invention is to eliminate the disadvantages of the aforementioned prior art.
  • the task consists in realizing an electric steering aid for a steering arrangement, which has an extremely compact design and which allows a quick response with good dynamics with an attractive steering behavior for the driver to be achieved with economical manufacturability.
  • the servo motor is designed as a disk-shaped electric motor and is installed directly coaxially in the shaft of the steering spindle, the steering shaft or the steering gear journal, the necessary reduction gear also being disk-shaped and also coaxially between the motor and the shaft of the steering spindle , the steering shaft or the steering gear journal is installed.
  • Disk-shaped is understood to mean that the width or the diameter is greater than the axial length.
  • electric motors DC or AC motors with or without brushes, i.e. also electronically commutated motors, can be used.
  • Reluctance motors are also particularly suitable, especially if they are switched electronically.
  • a disc rotor motor is very suitable as an electric motor because of the very quick response due to the small rotor masses.
  • This disc rotor motor can be built extremely flat.
  • a particularly suitable disk-shaped drive is the piezoelectric traveling wave motor, since it can achieve a high torque even at low speeds.
  • a gearbox can even be dispensed with, or the effort for the gearbox can be kept lower.
  • So-called epicyclic gears are suitable as flat gears, in which the main axis of the gearing lies within the circumference of an epicyclic gear, which are to be classified in particular in group F16H 1/32 of the international patent classification.
  • tension shaft gears which have an elliptical rotor, a flexible, externally toothed transmission element and an internally toothed ring as the transmission element, or harmonious drive gears, as these are very flat and with few parts with the high required reductions of up to a few hundred times can be built. If the reduction ratios are very large, it is easily possible to sandwich several gear discs in series without significantly increasing the size in the axial direction.
  • a particularly suitable embodiment of the harmony drive is the so-called pulsator gear, as it is in the magazine "Construction Electronics Mechanical Engineering” KEM November 1996 (ISSN 0934-0270, Verlag Konradin-Robert Kohlhammer GmbH, D-70771 Leinfelden-Echterdingen) on pages 94 to 95 is described in more detail as a so-called brain gear.
  • This transmission is particularly suitable for the present application because, in addition to the very flat design, it is low-noise, enables high power densities, is maintenance-free and inexpensive and has no play.
  • the plastic design allows a high degree of backlash and low-cost manufacture of the gearbox, which makes it particularly predestined for the present application in addition to all other known types of gearbox.
  • the inventive motor-gear combination and the coaxial installation lead to a high degree of efficiency, which enables additional fuel savings compared to the prior art.
  • the most favorable installation position of the inventive motor-gear arrangement is in the area of the steering shaft, which means that the full length of the coaxial steering shaft is retained in the event of a crash.
  • a controllable coupling is required between the drive and the shaft to be driven, which, for example, allows the servo drive to be decoupled from the shaft when driving fast and in the event of a breakdown.
  • the coupling device is combined with the transmission or integrated into the transmission.
  • a magnetic clutch in particular an electromagnetically operated clutch, such as a hysteresis clutch, which allows the degree of clutch engagement to be easily controlled, even at different speeds.
  • Fig. 1 shows schematically, in the form of a schematic diagram, the different areas of a steering column train
  • Fig. 2 shows schematically and in section a steering spindle assembly with servo drive according to the prior art
  • FIG. 3 shows schematically and in a sectional view an arrangement according to the invention of a coaxially constructed servo drive
  • the steering wheel 1 is divided into three areas, which are denoted by points A to D.
  • the steering wheel 1 is fastened at the end point A.
  • the other end of the steering shaft 3 is at a universal joint Point B connected to the steering shaft 5.
  • the steering shaft 5 is in turn connected via a universal joint at point C to the steering gear journal 6 with point D, ie the steering gear.
  • the steering shaft 5 and the steering spindle 3 are preferably designed to be telescopically displaceable in order to be able to absorb energy in the event of a crash.
  • the steering spindle 3 is mounted in a steering column housing, which in turn is connected to the vehicle housing via the steering column fastening 4.
  • phase II In the event of a crash, the front part of the vehicle is compressed in phase I and the displaceable steering shaft 5 yields in relation to the fixed point B. At the same time, the vehicle driver moves in the direction of the arrow 2 towards the steering wheel 1 and impacts there, the steering spindle 3 likewise absorbing energy by being pushed into one another. This is called phase II. In the event of a crash, it is important that sufficient telescopic sliding travel for shafts 3 and 5 can be maintained and that this is not restricted by additional installations.
  • FIG. 2 shows in section the upper part of a steering line according to the prior art, namely the steering wheel spindle 3 between points A and B.
  • the steering wheel is fastened to one end 7 of the spindle 3 and a universal joint 9 is arranged at the other end of the spindle, which connects the spindle 3 to the steering shaft 5.
  • the steering wheel spindle 3 is designed to be coaxial and longitudinally displaceable and is rotatably supported with the bearings 10 in the direction of the spindle longitudinal axis 8.
  • the shaft of the steering wheel spindle 3 is coupled to a gear 11, this gear being designed in a known manner as a bevel gear or as a worm gear.
  • an electric motor 12 is arranged coupled to the transmission 11.
  • the longitudinal spindle 3 with the servo drive 11, 12 is held in a housing 4 and fastened to the vehicle housing.
  • the commonly used direct current motors 12, of known design, have an elongated design, which means that the motor is fully extended on one side and thus makes poor use of the limited installation space available.
  • FIG. 3 An arrangement according to the invention is shown schematically in cross section in FIG. 3.
  • the housing 16 of the preferred disk rotor motor is fixedly mounted with respect to the vehicle housing 23, the gear shaft 18, which is connected and driven by the rotor disk 17, being rotatably mounted coaxially with the spindle 3 with the bearings 15.
  • the disc rotor motor has the permanent magnet 19 generating magnetic fields on both sides of the rotor disc 17. This engine design can be built extremely compact and flat.
  • the shaft 18 driven by the motor is elliptical in shape in the area of the gearbox core and deforms the elastic pulsator 20 when it rotates, which, due to the toothing 24 in the peripheral area, also moves the outer ring gear 19, which forms the gearbox output and is connected to the shaft 3, in a reduced manner.
  • a movement of the transmission outlet 19 is only possible if the stator 21 is fixedly connected to the vehicle housing 23. When this connection 22 is released, the rotor 21 rotates and the transmission outlet 19 remains in place.
  • the controllable connection or locking device 22 can thus be used to implement a simple coupling function which is inherent due to the structure of the transmission concept is realized.
  • the use of a magnetic clutch, in particular an electromagnetically operable clutch 22, is particularly easy to control and wear-free.
  • the magnetic clutch also offers rapid decoupling in the event of engine malfunctions, as well as high dynamics, ie quick response of the steering assistance.
  • automatic resetting is facilitated by rapid uncoupling when the driver does not require a moment.
  • the restoring force of the front axle is sufficient to straighten the wheels.
  • Another very suitable coupling design is the electroviscous fluid coupling. The principle is based on the fact that an electrical voltage controls the viscosity of a liquid, which in turn can be used for power transmission.
  • Such a coupling like the magnetic coupling mentioned above, allows rapid controllability. In addition, it is easy to set up and can be controlled with little power.
  • gear stator 21 With a relative movement of the gear stator 21 with respect to the vehicle housing 23, the power transmission behavior can even be controlled.
  • the gear stator 21 can optionally be braked to a standstill or even set in the opposite direction of rotation.
  • Motor-gear assemblies of the present type can be constructed together with the coupling in an extremely compact, coaxial manner on the shaft axis, preferably with dimensions ⁇ 90 mm in the axial direction with a diameter of less than 200 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne un système de direction pour véhicules automobiles équipé d'une commande par servomoteur électrique, sous forme de dispositif de direction assistée comprenant un moteur (13) à entrefer plat et un engrenage pulsatoire (14), lesquels sont de montage coaxial par rapport à l'arbre (3) de la broche du volant, ce qui permet d'obtenir une construction extrêmement compacte et économique et une réaction dynamique, avec de bonnes caractéristiques de transmission pour un comportement de la direction sensible lors de la conduite du véhicule.
PCT/CH1997/000326 1996-09-18 1997-09-05 Dispositif de direction electriquement assistee Ceased WO1998012097A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP51411498A JP2001505507A (ja) 1996-09-18 1997-09-05 電動かじ取り補助装置
EP97937394A EP0927128A1 (fr) 1996-09-18 1997-09-05 Dispositif de direction electriquement assistee
AU40078/97A AU4007897A (en) 1996-09-18 1997-09-05 Electrically assisteds steering booster

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
ATA1649/96 1996-09-18
ATA1648/96 1996-09-18
AT164996 1996-09-18
AT164896 1996-09-18
CH225/97 1997-02-01
CH22597 1997-02-01

Publications (1)

Publication Number Publication Date
WO1998012097A1 true WO1998012097A1 (fr) 1998-03-26

Family

ID=27147738

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1997/000326 Ceased WO1998012097A1 (fr) 1996-09-18 1997-09-05 Dispositif de direction electriquement assistee

Country Status (4)

Country Link
EP (1) EP0927128A1 (fr)
JP (1) JP2001505507A (fr)
AU (1) AU4007897A (fr)
WO (1) WO1998012097A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057000A1 (fr) * 1998-05-01 1999-11-11 Krupp Presta Ag Dispositif d'assistance electrique de direction
WO2000034108A1 (fr) * 1998-12-08 2000-06-15 Ford Motor Company Boitier de direction a assistance electrique
WO2000059766A1 (fr) * 1999-03-30 2000-10-12 Krupp Presta Ag Direction a assistance electrique comportant une unite d'entrainement a denture droite compacte
DE19748667C2 (de) * 1996-11-05 2002-02-14 Toyota Motor Co Ltd Lenkkrafthilfe
WO2004000629A3 (fr) * 2002-06-22 2004-03-04 Zf Lenksysteme Gmbh Systeme de direction conçu pour un vehicule
WO2009157607A1 (fr) * 2008-06-24 2009-12-30 Korea Institute Of Science And Technology Démultiplicateur harmonique utilisant un engrenage décalé profilé
DE102017205516A1 (de) 2017-03-31 2018-10-04 Ford Global Technologies, Llc Servolenkung für ein Kraftfahrzeug sowie Kraftfahrzeug
US11117613B2 (en) 2018-01-15 2021-09-14 Ford Global Technologies, Llc Steering assist apparatus for a motor vehicle
DE102021207827A1 (de) 2021-07-21 2023-01-26 Thyssenkrupp Ag Lenkeinrichtung für ein Kraftfahrzeug
DE102024117433A1 (de) * 2024-06-20 2025-12-24 Inventus Engineering Gmbh Lenkeinrichtung für ein Kraftfahrzeug

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101189627B1 (ko) * 2009-06-24 2012-10-12 한국기술교육대학교 산학협력단 스티어 바이 와이어 조향장치
JP4921617B2 (ja) * 2010-03-03 2012-04-25 パナソニック株式会社 磁気パルセーションモータ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2925156B1 (de) * 1979-06-22 1980-09-25 Daimler Benz Ag Kraftfahrzeug mit Lenkhandrad und einer Antriebseinheit dafuer
EP0124790A1 (fr) * 1983-05-05 1984-11-14 The Bendix Corporation Mécanisme de direction à assistence électrique
US5123300A (en) * 1991-08-28 1992-06-23 Dynamics Research & Development Corp. Phasing transmission
EP0570673A1 (fr) * 1992-05-16 1993-11-24 Daimler-Benz Aktiengesellschaft Moteur à ondes progressives fonctionnant en modes de vibrations différents

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0174137A3 (fr) * 1984-08-30 1987-07-15 Eaton Corporation Mécanisme de sécurité pour un système de direction assistée électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2925156B1 (de) * 1979-06-22 1980-09-25 Daimler Benz Ag Kraftfahrzeug mit Lenkhandrad und einer Antriebseinheit dafuer
EP0124790A1 (fr) * 1983-05-05 1984-11-14 The Bendix Corporation Mécanisme de direction à assistence électrique
US5123300A (en) * 1991-08-28 1992-06-23 Dynamics Research & Development Corp. Phasing transmission
EP0570673A1 (fr) * 1992-05-16 1993-11-24 Daimler-Benz Aktiengesellschaft Moteur à ondes progressives fonctionnant en modes de vibrations différents

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HIRN H: "UNTERSETZUNGSGETRIEBE AUS KUNSTOFF MIT NUR ZWEI BEWEGTEN TEILEN GENIAL EINFACH", KEM. KONSTRUKTION, ELEKTRONIK, MASCHINENBAU, November 1996 (1996-11-01), pages 94/95, XP000645907 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19748667C2 (de) * 1996-11-05 2002-02-14 Toyota Motor Co Ltd Lenkkrafthilfe
WO1999057000A1 (fr) * 1998-05-01 1999-11-11 Krupp Presta Ag Dispositif d'assistance electrique de direction
WO2000034108A1 (fr) * 1998-12-08 2000-06-15 Ford Motor Company Boitier de direction a assistance electrique
EP1013534A1 (fr) * 1998-12-08 2000-06-28 Ford-Werke Aktiengesellschaft Direction assistée électrique en particulier pour véhicules à moteur
US6273211B1 (en) 1998-12-08 2001-08-14 Visteon Global Technologies, Inc. Electric power-steering gear, in particular for motor vehicles
US6564664B1 (en) * 1999-03-30 2003-05-20 Thyssenkrupp Presta Ag Electrically supported steering boost with compact spur gear arrangement
WO2000059766A1 (fr) * 1999-03-30 2000-10-12 Krupp Presta Ag Direction a assistance electrique comportant une unite d'entrainement a denture droite compacte
CN1144712C (zh) * 1999-03-30 2004-04-07 泰森克鲁普普里斯塔股份公司 带有紧凑的正齿轮变速器装置的电力转向助力器
WO2004000629A3 (fr) * 2002-06-22 2004-03-04 Zf Lenksysteme Gmbh Systeme de direction conçu pour un vehicule
WO2009157607A1 (fr) * 2008-06-24 2009-12-30 Korea Institute Of Science And Technology Démultiplicateur harmonique utilisant un engrenage décalé profilé
US8656800B2 (en) 2008-06-24 2014-02-25 Korea Institute Of Science And Technology Harmonic drive using profile shifted gear
DE102017205516A1 (de) 2017-03-31 2018-10-04 Ford Global Technologies, Llc Servolenkung für ein Kraftfahrzeug sowie Kraftfahrzeug
US11117613B2 (en) 2018-01-15 2021-09-14 Ford Global Technologies, Llc Steering assist apparatus for a motor vehicle
DE102021207827A1 (de) 2021-07-21 2023-01-26 Thyssenkrupp Ag Lenkeinrichtung für ein Kraftfahrzeug
DE102024117433A1 (de) * 2024-06-20 2025-12-24 Inventus Engineering Gmbh Lenkeinrichtung für ein Kraftfahrzeug

Also Published As

Publication number Publication date
AU4007897A (en) 1998-04-14
EP0927128A1 (fr) 1999-07-07
JP2001505507A (ja) 2001-04-24

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