WO2009118202A1 - Dispositif de commande pour véhicule motorisé, présentant un volant de direction et un engrenage à superposition - Google Patents

Dispositif de commande pour véhicule motorisé, présentant un volant de direction et un engrenage à superposition Download PDF

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Publication number
WO2009118202A1
WO2009118202A1 PCT/EP2009/002425 EP2009002425W WO2009118202A1 WO 2009118202 A1 WO2009118202 A1 WO 2009118202A1 EP 2009002425 W EP2009002425 W EP 2009002425W WO 2009118202 A1 WO2009118202 A1 WO 2009118202A1
Authority
WO
WIPO (PCT)
Prior art keywords
gearing
steering
steering device
toothing
steering wheel
Prior art date
Application number
PCT/EP2009/002425
Other languages
English (en)
Inventor
Dieter Markfort
Andreas Pradel
Original Assignee
Takata-Petri 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 Takata-Petri Ag filed Critical Takata-Petri Ag
Publication of WO2009118202A1 publication Critical patent/WO2009118202A1/fr

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
    • B62D5/008—Changing the transfer ratio between the steering wheel and the steering gear by variable supply of energy, e.g. by using a superposition gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/04—Hand wheels
    • B62D1/10—Hubs; Connecting hubs to steering columns, e.g. adjustable
    • B62D1/105—Non-rotatable hubs, e.g. the central part of the steering wheel not rotating

Definitions

  • Steering device for a motor vehicle having a steering wheel and a superposition gearing
  • the invention relates to a steering device for a motor vehicle, having a steering wheel and having a superposition gearing, as per the preamble of Claim 1, and to a gearing for a steering device of said type.
  • Superposition steering systems are characterized in that a steering angle input by a driver can have a further angle superposed on it by an actuator.
  • DE 101 60 313 Al discloses a superposition gearing which is arranged between an input shaft, which is connected to the steering wheel, and an output shaft, which is connected to a steering gear.
  • WO 2007/009420 Al describes a superposition gearing for a superposition steering system, in which the actuator for the superposition steering system is arranged in the steering wheel.
  • Superposition steering systems are used for example in a so-called dynamic steering system.
  • Dynamic steering systems permit a steering intervention at the front axle by means of the superposition of a steering angle.
  • the superposition of a steering angle can take place in a speed-dependent fashion.
  • Documents DE 2131902 A, WO 2006/070155 Al and DE 10 2006 031 290 Al disclose steering wheels with fixed steering wheel elements which do not co-rotate as the steering wheel rotates.
  • a steering wheel with a steering shaft which is formed as a hollow shaft. Inside the hollow shaft is located the axis of a fixed steering hub.
  • the present invention is based on the object of providing a steering device for a motor vehicle having a superposition gearing, and a corresponding gearing, which permit the integration of non-rotating elements.
  • a superposition gearing having a rotary gearing element which rotary gearing element has a toothing, by means of which a rotation of the rotary gearing element can be transmitted to the steering shaft, and which rotary gearing element also has an opening which provides a passage for at least one non-rotating element.
  • the non- rotating element forms the worm gear of a worm gear mechanism.
  • the toothing of the rotary gearing element is an internal toothing which is formed on the periphery of the opening of the rotary gearing element.
  • the toothing can, however, also be an external toothing.
  • the toothing is in direct or indirect engagement with a toothing of the steering shaft and, in this way, transmits a rotational movement to the steering shaft.
  • the rotary gearing element to form the worm gear of the worm gear mechanism, has a further toothing into which engages a drive worm of the worm gear mechanism.
  • the further toothing is for example an external toothing, while the toothing which is coupled to the steering shaft is an internal toothing.
  • the superposition gearing is arranged in a gearing housing which is fastened to the steering wheel.
  • the fastening of the gearing housing to the steering wheel serves to provide a compact overall arrangement.
  • the non-rotating element which projects through the opening of the rotary gearing element can be designed in several different ways.
  • said non-rotating element is at least one line.
  • This can be any desired type of line which conducts energy in electrical, gaseous and/or liquid form and/or information into the steering wheel and out of the steering wheel, such as for example electrical cables, compressed air lines etc.
  • the non-rotating element is a holding element which is fastened so as to be fixed with respect to the vehicle and which projects through the opening of the rotary gearing element in the direction of the driver and which is rotationally fixedly fastened to the at least one element of the steering wheel.
  • Said rotationally fixedly fastened element can for example be a steering wheel pot or some other central element of the steering wheel, with it being possible for an airbag module to be integrated into the rotationally fixedly fastened element.
  • An airbag module which is integrated into the steering wheel in this way can be of asymmetrical design in its entirety or at least with regard to its airbag, since said element does not participate in the rotation of the steering wheel. This makes it possible to realize safety-relevant features in the airbag which are not possible when using co-rotating airbags on account of the rotational symmetry which is then necessary.
  • the rotationally fixedly fastened element can also have control elements such as switches or controllers which are fastened to the steering wheel. If in such embodiment the electrical feed cables of the mentioned control elements are guided as non-rotating elements through the opening of the rotary gearing element, the use of conventional contact devices in the steering wheel region can be dispensed with.
  • the steering wheel is rotatably connected to at least one part which is fixed to the vehicle, that is to say said steering wheel is rotatably mounted in the vehicle.
  • the rotatability can for example be provided by mountings or mounting seats, such as for example sleeves, which engage one into the other and which are formed on the respective parts.
  • the invention also relates to a gearing for a steering device which has a rotary gearing element which forms a toothing, by means of which a rotation of the rotary gearing element can be transmitted to the steering shaft, which has an opening which provides a passage for at least one non-rotating element, and which forms the worm gear of a worm gear mechanism.
  • Figure 1 shows an exploded illustration of the elements of a superposition gearing according to the invention
  • Figure 2 shows, in a perspective view, the elements of the superposition gearing from Figure 1 in the assembled state
  • Figure 3 shows a plan view of the superposition gearing from Figure 2;
  • Figure 4 shows a steering device having a steering wheel and a superposition gearing, as per Figures 1 to 3, in an exploded illustration;
  • Figure 5 shows the steering device from Figure 4 in the assembled state in a first perspective view
  • Figure 6 shows the steering device from Figure 4 in a second perspective view
  • Figure 7 shows the steering device from Figure 4 in a third perspective view
  • Figure 8 shows an exploded illustration of a further exemplary embodiment of a superposition gearing of a steering device, with a non- rotating mounting and holding element being provided;
  • Figure 9 shows the superposition gearing from Figure 8 in the assembled state in a perspective view
  • Figure 10 shows the superposition gearing from Figures 8 and 9 in a perspective view obliquely from above, with latching pins of the non-rotating mounting and holding element being visible;
  • Figure 11 shows the superposition gearing from Figures 8 and 9 in a perspective view obliquely from below, with latching openings of a steering wheel pot being visible;
  • Figure 12 shows an exploded illustration of a steering device having a superposition gearing as per
  • Figure 13 shows the assembled steering device as per
  • Figure 14 shows the assembled steering device from Figure 12 in a second perspective view.
  • Figures 1 to 3 show a superposition gearing which is suitable for superposing a further steering angle on a steering angle input by a driver in a steering device.
  • the superposition gearing comprises a rotary gearing element 20 which has an external toothing 21, a central opening 23 and an internal toothing 22 formed on the central opening.
  • the gearing also has a drive worm 11 which is driven by an electric drive motor 10.
  • the external toothing 21 of the rotary gearing element 20 forms a worm gear which is driven by the drive worm 11.
  • the drive worm 11 and the gearing element 20 thereby form a worm gear mechanism.
  • the drive motor 10 together with the worm gear mechanism forms an actuator of a superposition steering system.
  • the internal toothing 22 of the rotary gearing element 20 meshes with an external toothing 31 of a steering shaft 30.
  • the steering shaft 30 is connected, in a manner known per se, to a steering gear (not illustrated) .
  • a servo motor of a servo steering system can also be coupled to the steering shaft 30.
  • the steering shaft 30 need not necessarily be formed as a cylindrical element.
  • the steering shaft refers to any element which transmits a rotary movement of the superposition gearing to a steering gear. It is also pointed out that the steering shaft 30 can be radially and axially mounted by means of mounting elements.
  • a cable guide 40 is provided which is guided through the opening 23 of the gearing element 20.
  • the cable guide 40 is formed as a cylindrical sleeve with an open cross section 41 and serves for holding one or more lines and/or cables. It is also possible to directly use a cable or some other line instead of a cable guide.
  • the rotational axes 32, 24 of the steering shaft 30 and of the gearing element 20 are offset with respect to one another, that is to say the rotational axis 32 of the steering shaft 30 runs eccentrically with respect to the rotational axis 24 of the gearing element 20.
  • the external toothing 31 of the steering shaft 30 is therefore in engagement with the internal toothing 22 of the gearing element 20 in only one region.
  • the gearing element 20 forms, at both sides in the axial direction, a type of sleeve 25 which forms the central opening 23 and the internal toothing 22.
  • the worm gear with the external toothing 21 is plugged centrally onto said sleeve 25.
  • the worm gear and the sleeve can form one part, in which case the gearing element 20 is of single-piece design, or can form two different components, which are connected.
  • Figures 4 to 7 show a steering wheel 60, a steering wheel mounting arrangement 70 and a gearing housing 80.
  • the steering wheel 60 has a steering wheel rim 61, three spokes 62 and a steering wheel base 63.
  • the use of three spokes 62 is to be understood here merely as an example. It is also possible for some other number of spokes to be provided.
  • the spokes 62 connect the steering wheel rim 61 to the steering wheel base 63.
  • the steering wheel base 63 has an opening 65 and, at its side facing toward the steering shaft 30, forms a sleeve 64.
  • the steering wheel mounting arrangement 70 has a mounting element 71, which is of angular design in the illustrated exemplary embodiment and has two limbs 711, 712.
  • the one limb 712 has an opening 72 and, adjoining the latter, a sleeve 73.
  • the sleeve 73 of the mounting element 71 and the sleeve 64 of the steering wheel base 63 are dimensioned here such that the sleeve 64 of the steering wheel base 63 can be pushed into the sleeve 73 of the mounting element 71, and said sleeves bear substantially coaxially against one another. Rotatable radial mounting of the sleeve 64 and therefore of the steering wheel 60 is provided in this way.
  • the mounting element 71 is connected to a part which is fixed to the vehicle.
  • the mounting by means of sleeves 64, 73 is to be understood here merely as an example. Other mounting seats can also be used.
  • the gearing housing 80 serves to hold the drive motor 10, the drive worm 11 and the gearing element 20, and serves to protect and cover these.
  • the gearing element 20 is inserted into the opening 65 of the steering wheel base 63, with the sleeve 25 of the gearing element 20 projecting into the sleeve 64 of the steering wheel base and being radially mounted by said sleeve.
  • the gearing housing 80 is rotationally fixedly fastened to the steering wheel base 63. The steering movement of a driver is therefore transmitted, in the same way as a steering movement provided by means of the superposition gearing, via the gearing element 20 to the steering shaft 30.
  • the steering wheel 60 can be actuated in the usual way by a driver by means of the steering wheel rim 61.
  • the driver inputs a steering angle.
  • This steering angle input by the driver can have a further angle superposed on it by means of the superposition gearing.
  • the steering performed by means of the superposition gearing can supplement or else entirely replace the manual steering by a driver.
  • the drive motor 10 is controlled in a suitable manner by a control device (not illustrated) which receives input signals from one or more sensors.
  • the cable guide 40 projects out of the opening 23 of the gearing element 20 and out of a corresponding opening 81 of the gearing housing 80, and is not affected by a rotational movement of the steering wheel, of the superposition gearing and of the steering shaft.
  • Figures 8 to 10 show a further refinement of a superposition gearing, with the gearing elements themselves being unchanged in relation to the embodiment of Figures 1 to 3, and therefore reference is made to the statements regarding said figures.
  • a non- rotating mounting and holding element 90 is again provided, which is arranged in the motor vehicle, so as to be fixed with respect to the vehicle, by means of a mounting element 100.
  • the non-rotating mounting and holding element 90 is of elongate design, with the mounting and holding element 90, in the assembled state as per Figures 9 to 11, projecting in an upper section 91 through the opening 23 of the gearing element 20.
  • the upper section 91 has, at the end side, two latching pins 92 which protrude axially.
  • the mounting and holding element 90 also has, on its side facing toward the steering shaft 30, a partially circular cutout 93 which extends in the longitudinal direction.
  • the steering shaft 30 bears against the cutout 93, as a result of which the mounting and holding element 90 provides a radial bearing for the steering shaft 30.
  • the cutout 93 serves merely to provide a favourable apportionment of space in the region of the opening 23, without the element 90 providing a radial bearing for the steering shaft 30.
  • the device illustrated in Figures 8 to 11 also has an element 110 which is connected to that end 91 of the mounting and holding element 90 which projects through the opening 23 of the actuating element 20.
  • connection takes place for example by means of the latching pins 92, with corresponding latching openings 111 being provided, as per Figure 11, in the element 110.
  • An opening 112 for the cable guide 40 or for one or more cables or other lines is also provided.
  • the cable guide 40 is integrated, as per Figure 8, into the mounting and holding element 90.
  • connection illustrated in Figures 10 and 11 between the mounting and holding element 90 and the element 110 is merely an example.
  • the connection can take place in a variety of ways .
  • the element 110 on account of its connection to the non-rotating mounting and holding element 90, is likewise non-rotating, that is to say is rotationally fixed and is correspondingly- arranged in the motor vehicle so as to be fixed with respect to the vehicle.
  • the non-rotating element 110 is embodied as a central steering wheel element, usually referred to as a steering wheel pot.
  • the steering wheel pot 110 can contain an airbag module and/or control elements.
  • an airbag module with an asymmetrical design or an airbag module in which at least the airbag has an asymmetrical design is integrated into the steering wheel pot 110.
  • FIG. 8 to 11 The exemplary embodiment described in Figures 8 to 11 permits the realization of a superposition gearing in a steering wheel with a fixed steering wheel pot.
  • Figures 12 to 14 show a steering device having the superposition gearing of Figures 8 to 11 and a steering wheel and a steering wheel mounting arrangement.
  • the components of the steering device are the non-rotating element 110 (for example a steering wheel pot with integrated airbag module) , the superposition gearing itself with drive motor 10, drive worm 11 and rotary element 20 and an associated gearing housing 80, the steering wheel 60, the steering wheel mounting arrangement 70, the non-rotating mounting and holding element 90 with mounting element 100 and integrated cable guide 40, and the steering shaft 30 with end-side external toothing 31.
  • Said elements have already been explained with regard to the preceding figures, and therefore reference can be made to the statements made in this regard.
  • the mounting element 100 of the mounting and holding element 90 is fastened to the mounting element 71 of the steering wheel 60. This is expedient since both mounting arrangements are fixed with respect to the vehicle.
  • the two mounting elements 71, 100 can however fundamentally be separately connected to vehicle constituents which are fixed with respect to the vehicle.
  • the invention is not restricted in terms of its design to the above-illustrated exemplary embodiments; these are to be understood merely as examples. It can for example be provided that the steering wheel base is formed in some other way. The mounting both of the steering wheel and also of the non-rotating mounting and holding element can take place in some other way. The non-rotating mounting and holding element which projects through the opening of the rotary element 20 can likewise be formed in some other way, with it being imperative merely for a non-rotating part to project through the opening of the rotary element 20 and to thereby permit a fixed, non-rotating fastening of a steering wheel pot or the like to the mounting and holding element, while simultaneously providing a superposition steering system.

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

Abstract

La présente invention concerne un dispositif de commande pour véhicule motorisé présentant un volant de direction et présentant un engrenage à superposition qui transmet un mouvement de réglage motorisé à un arbre de direction. L’engrenage à superposition présente un élément d’engrenage rotatif (20) possédant une denture (22) permettant de transmettre une rotation de l’élément d’engrenage rotatif (20) à l’arbre de direction (30), une ouverture (23) assurant un passage pour au moins un élément non rotatif (40, 90), et ledit élément d’engrenage rotatif (20) forme l’engrenage à vis sans fin d’un mécanisme à engrenage à vis sans fin. L’invention concerne également un engrenage présentant un élément d’engrenage dudit type.
PCT/EP2009/002425 2008-03-26 2009-03-26 Dispositif de commande pour véhicule motorisé, présentant un volant de direction et un engrenage à superposition WO2009118202A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE200810016970 DE102008016970B3 (de) 2008-03-26 2008-03-26 Lenkvorrichtung für ein Kraftfahrzeug mit einem Lenkrad und einem Überlagerungsgetriebe
DE102008016970.6 2008-03-28
US6036108P 2008-06-10 2008-06-10
US61/060,361 2008-06-10

Publications (1)

Publication Number Publication Date
WO2009118202A1 true WO2009118202A1 (fr) 2009-10-01

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ID=40984261

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Application Number Title Priority Date Filing Date
PCT/EP2009/002425 WO2009118202A1 (fr) 2008-03-26 2009-03-26 Dispositif de commande pour véhicule motorisé, présentant un volant de direction et un engrenage à superposition

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DE (1) DE102008016970B3 (fr)
WO (1) WO2009118202A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMO20120156A1 (it) * 2012-06-15 2013-12-16 Phil Studium Engineering S R L Gruppo integrato di volante, srumentazione e comandi
ITRE20130008A1 (it) * 2013-02-20 2014-08-21 Lovol Europ Engineering S R L Sistema di sterzatura per veicoli

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453949A (en) * 1945-05-12 1948-11-16 Yale & Towne Mfg Co Manually controlled power booster mechanism
DE10245975A1 (de) * 2002-10-02 2004-04-22 Zf Lenksysteme Gmbh Hilfskraftlenkung mit hydraulischer Hilfskraftunterstützung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2131902A1 (de) * 1971-06-26 1972-12-28 Heckler & Koch Gmbh Lenkrad fuer ein Kraftfahrzeug od.dgl.
DE10160313A1 (de) * 2001-08-14 2003-03-20 Continental Teves Ag & Co Ohg Überlagerungsgetriebe für eine Überlagerungslenkung
FR2879990B1 (fr) * 2004-12-23 2008-07-18 Snr Roulements Sa Systeme d'actionnement d'arbre de direction instrumente comprenant un centre fixe
DE102005034636B3 (de) * 2005-07-20 2007-03-22 Takata-Petri Ag Lenkeinrichtung für eine Überlagerungslenkung
DE102006031290A1 (de) * 2006-02-06 2007-08-09 Zf Lenksysteme Gmbh Lenkwelle für ein Lenkrad mit feststehender Lenknabe und einem Überlagerungsgetriebe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453949A (en) * 1945-05-12 1948-11-16 Yale & Towne Mfg Co Manually controlled power booster mechanism
DE10245975A1 (de) * 2002-10-02 2004-04-22 Zf Lenksysteme Gmbh Hilfskraftlenkung mit hydraulischer Hilfskraftunterstützung

Also Published As

Publication number Publication date
DE102008016970B3 (de) 2009-09-24

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