WO2024061947A1 - Steering device for steer-by-wire steering system - Google Patents

Steering device for steer-by-wire steering system Download PDF

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Publication number
WO2024061947A1
WO2024061947A1 PCT/EP2023/075880 EP2023075880W WO2024061947A1 WO 2024061947 A1 WO2024061947 A1 WO 2024061947A1 EP 2023075880 W EP2023075880 W EP 2023075880W WO 2024061947 A1 WO2024061947 A1 WO 2024061947A1
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WO
WIPO (PCT)
Prior art keywords
steering
steering device
electric motor
steering handle
bearing
Prior art date
Application number
PCT/EP2023/075880
Other languages
German (de)
French (fr)
Inventor
Dominik Schütz
Original Assignee
ZF Automotive Safety Germany 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 Automotive Safety Germany GmbH filed Critical ZF Automotive Safety Germany GmbH
Publication of WO2024061947A1 publication Critical patent/WO2024061947A1/en

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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
    • B62D5/001—Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup
    • B62D5/005—Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup means for generating torque on steering wheel or input member, e.g. feedback
    • B62D5/006—Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup means for generating torque on steering wheel or input member, e.g. feedback power actuated
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
    • B60R21/2032—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns the inflator or inflatable member not being rotatable with the steering wheel; Arrangements using the steering column or steering wheel rim for storing, supplying or evacuating the inflation gas or for storing the inflatable member

Definitions

  • the invention relates to a steering device for a steer-by-wire steering system of a motor vehicle, with a steering handle, a force feedback unit and a fixed support.
  • the force feedback unit also called a force feedback unit, is intended to transmit road feel lost due to the elimination of the steering column to the driver via the steering handle in accordance with the driving conditions.
  • Such steering devices usually include an airbag module housed in the steering handle or the steering wheel in order to protect the driver.
  • an airbag module housed in the steering handle or the steering wheel in order to protect the driver.
  • asymmetrical, large-area steering wheel gas bags there is an effort to keep the gas bag module stationary, even when the steering wheel is turned.
  • the asymmetrical gas bag can then always assume its spatially fixed, ideal position, regardless of whether the motor vehicle is cornering or driving straight ahead.
  • the gas bag module was decoupled from the rotational movement of the steering handle passively using a gear or actively using a servomotor.
  • Known steering devices have the disadvantage that they are very voluminous and also include many individual parts, especially if the steering device additionally has an airbag module with rotation compensation.
  • the object of the invention is therefore to provide a steering device for a steer-by-wire steering system that is particularly compact and simple.
  • a steering device for a steer-by-wire steering system of a motor vehicle with a steering handle, a force feedback unit, a fixed carrier which has an axially extending receiving pot for an airbag, and a storage unit, by means of which the steering handle is mounted on the receiving pot so that it can rotate in the circumferential direction about the axial direction.
  • the bearing unit has teeth and is coupled to the steering handle in a torque-transmitting manner.
  • the force feedback unit has an electric motor and a pinion which is coupled to the electric motor in a torque-transmitting manner and which is in toothed engagement with the toothing in order to drive the steering handle in the circumferential direction via the bearing unit.
  • the term “fixed” or a “fixed” carrier is understood to mean a carrier that is arranged fixed to the vehicle in the motor vehicle, in particular while driving.
  • the fixed support can be adjustable by means of an adjustment mechanism in order to align the steering handle with respect to the driver and thus increase comfort.
  • the fixed support in contrast to a classic steering device, is not a steering column that is rotatably mounted in the circumferential direction, even if the fixed support can be height and / or length-adjustable similar to the steering column in order to improve the driver's comfort.
  • the steering device can be designed in this way with few components and in a particularly space-saving and therefore compact manner. Furthermore, this design has the advantage that the gas bag is arranged in a fixed manner in the receiving pot in the motor vehicle and as a result, asymmetrical and even arbitrarily designed gas bags can be provided, which can always provide the same protective effect regardless of the steering position of the steering handle.
  • the toothing is an internal toothing, whereby the steering device can be designed to be even more compact, in particular in the radial direction, since the electric motor can be arranged at least in sections radially within the bearing unit, in particular radially within an outer shell of the bearing unit.
  • At least the stator and the rotor of the electric motor are arranged in the axial direction outside the bearing unit, preferably outside an outer shell of the bearing unit, in particular axially outside the steering handle.
  • the outer shell can be designed to be more compact since there is no space to accommodate the Electric motor must be provided in the outer shell. Since there is a shaft journal attached to the rotor on which the pinion sits or the puzzle is worked out, this shaft journal is by definition not part of the rotor. The end of the shaft journal, on which the pinion is attached, can therefore protrude into the space defined by the steering handle, i.e. its hollow interior.
  • the force feedback unit has a secondary electric motor which has a second pinion coupled to the secondary electric motor in a torque-transmitting manner and which is in toothed engagement with the toothing in order to drive the steering handle in the circumferential direction via the bearing unit, in particular an outer shell of the bearing unit.
  • the secondary electric motor is designed in a similar way to the primary electric motor and can in particular provide the same functions. This has the advantage that the two electric motors can each be designed smaller than when using a single electric motor, which means that the steering device can be designed more compactly.
  • the steering device can be designed in such a way that if one of the two electric motors fails, the steering device can continue to be operated safely by means of the other electric motor. This redundancy ensures a particularly high level of functional reliability of the steering device and thus of the steer-by-wire steering system.
  • the bearing unit has an inner shell, which is non-rotatably attached to the carrier, and an outer shell with the teeth, wherein the outer shell is mounted on the inner shell and rotatably on the receiving pot and is coupled to the steering handle in a torque-transmitting manner, the pinion being in mesh with the teeth Intervention is available to drive the steering handle in the circumferential direction via the outer shell of the bearing unit.
  • the secondary electric motor analogous to the primary electric motor, it can be provided that at least the stator and the rotor of the secondary electric motor are arranged in the axial direction outside the outer shell, in particular outside the steering handle.
  • the end of the shaft journal on which the pinion is attached can protrude into the space defined by the steering handle, i.e. its hollow interior, because the shaft journal is attached to the rotor but is not included in it.
  • the inner shell can be attached to the receiving pot in order to make the connection of the storage unit to the carrier particularly compact.
  • the outer shell is rotatably mounted on the inner shell by means of a bearing.
  • the bearing is a needle bearing, ball bearing and/or plain bearing, which are particularly reliable and cost-effective and can also be designed to be very compact.
  • the steering device has a gas generator for inflating the gas bag.
  • the gas generator is arranged outside the receiving pot, in particular in the carrier. In this way, the receiving pot can be made smaller, since no installation space has to be reserved for the gas generator.
  • the steering device can have a steering angle sensor unit.
  • the electric motor and/or the secondary electric motor forms a sensor of the steering angle sensor unit, whereby the electric motor and/or the secondary electric motor combines several functions and thus the steering device can consist of fewer components.
  • the steering handle is attached to the outer shell by means of a quick-release fastener that can be operated in particular without tools.
  • This design has the advantage that the steering handle can be replaced with little effort and in a short time.
  • the steering device can also be designed to be particularly compact.
  • the steering device has a functional element assigned to the steering handle, which is connected to the inner shell or the carrier in a rotationally fixed manner.
  • the functional element has a display and/or one or more switches, which are arranged in a fixed manner in the motor vehicle and thus always have the same orientation regardless of the position of the steering handle. This means that the contents of the display can always be easily viewed and the switches are always arranged in the same place, which prevents incorrect operation.
  • FIG. 1 is a schematic exploded view of a steering device according to the invention for a steer-by-wire steering system
  • FIG. 1 shows a schematic representation of the steering device from Figure 1.
  • FIG. 1 shows a steering device 10 for a steer-by-wire steering system of a motor vehicle with a fixed carrier 12, a bearing unit 14, a steering handle 16 and a force feedback unit 18.
  • the steering device 10 has a gas bag module 20 with a gas bag 22 and a gas generator 24, which is set up to inflate the gas bag 22 in a restraint situation.
  • the steering device 10 has a functional element 26, which is assigned to the steering handle 16 and is therefore arranged together with the steering handle 16 opposite a driver in the motor vehicle.
  • the functional element 26 is not visible or not shown in FIG.
  • the carrier 12 has a receiving pot 28 which extends in the axial direction A and is open at an axial end 30 facing the vehicle interior.
  • the gas bag 22 is accommodated in the receiving pot 28, while the gas generator 24 is arranged outside the receiving pot 28 on the carrier 12 (see FIG. 2).
  • the gas generator 24 can be accommodated outside the receiving pot 28 in a recess in the carrier 12.
  • the gas bag 22 is a driver gas bag or front gas bag.
  • the bearing unit 14 has a circular cylindrical inner shell 32 and a circular cylindrical outer shell 34 as well as a bearing 36 by means of which the outer shell 34 is rotatably mounted on the inner shell 32 in the circumferential direction U about the axial direction A.
  • the bearing 36 is a needle bearing which is particularly compact in the radial direction.
  • the bearing 36 can be any bearing, in particular a ball bearing or a plain bearing.
  • the inner shell 32 is attached to the receiving pot 28.
  • the bearing unit 14 has a toothing 38 in the form of an internal toothing, which is arranged in the axial direction A opposite to the axial end 30.
  • the outer shell 34 forms a hub for the steering handle 16, on which the steering handle 16 is secured in a rotationally fixed manner by means of a quick-release fastener 40.
  • the steering handle 16 has an axial extension 42, which engages in a complementary recess 44 in the outer shell 34 and thereby couples the steering handle 16 to the outer shell 34 in a rotationally fixed manner.
  • the receiving pot 28, the inner shell 32, the outer shell 34 and the steering handle 16 or the quick-release fastener 40 are arranged coaxially and radially adjacent in at least one section.
  • the quick-release fastener 40 can in particular be operated without tools and has, for example, a quick-release element (not shown).
  • the functional element 26 is attached to the carrier 12, for example at the axial end 30 of the inner shell 32, via a correspondingly designed carrier element (not shown) and is thus decoupled from the steering handle 16 and arranged in a fixed manner in the motor vehicle.
  • the functional element is 26, the embodiment shown has a display 46 and four buttons or switches 48.
  • the functional element 26 can be fastened in a known manner so that it can be removed from the expansion path of the gas bag 22, for example by means of a cap that can be folded away or blown off.
  • the force feedback unit 18 has a primary electric motor 50 and a secondary electric motor 52 as well as a control unit 54, which is connected to the electric motors 50, 52 in a signal-transmitting manner.
  • the primary electric motor 50 and the secondary electric motor 52 are designed identically.
  • the force feedback unit 18 has a first pinion 56, which meshes with the toothing 38 and is connected to the primary electric motor 50 in a torque-transmitting manner, and a second pinion 58, which is connected to the toothing 38 meshes and is connected to the secondary electric motor 52 in a torque-transmitting manner.
  • the electric motors 50, 52 are arranged relative to the receiving pot 28 axially opposite to the axial end 30 in such a way that at least the stator and the rotor (not shown) of each electric motor 50, 52 are outside the bearing unit 14 and the in the axial direction A Steering handle 16 are arranged.
  • the steering device 10 is designed such that the electric motors 50, 52 do not protrude radially beyond the outer shell 34 (see Figure 2).
  • the electric motors 50, 52 in the present embodiment are arranged radially inside the outer shell 34, in particular completely.
  • the control unit 54 can be part of an on-board computer of the motor vehicle or can be formed by it.
  • control unit 54 and the electric motors 50, 52 are also part of a steering angle sensor unit 60 of the steering device 10, which is set up to detect the steering movement of the steering handle 16.
  • the steering movement of the steering handle 16 is transmitted to the electric motors 50, 52 by means of the outer shell 34 via the toothing 38 and detected by the control unit 54.
  • the electric motors 50, 52 each form a steering angle sensor of the steering angle sensor unit 60.
  • the steering device 10 may have a steering angle sensor unit 60 with a separate control unit and/or at least one separate steering angle sensor, which is set up to detect the steering movement of the steering handle 16. In this way, a steering device 10 is provided for a steer-by-wire steering system of a motor vehicle, which is designed to be particularly compact.
  • gas bag 22 and the functional element 26 are stationary and thus arranged in the circumferential direction U independently of the steering movement or angular position of the steering handle 16.
  • the invention is not limited to the embodiment shown.
  • individual features of one embodiment can be combined as desired with features of other embodiments, in particular independently of the other features of the corresponding embodiments.

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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 steering device (10) for a steer-by-wire steering system of a motor vehicle has a steering handle (16), a force feedback unit (18), a stationary support (12) and a bearing unit (14), by means of which the steering handle (16) is mounted rotatably in the circumferential direction (U). The bearing unit (14) has, in particular, an inner shell (32) and an outer shell (34) which is mounted rotatably on the inner shell (32) and is coupled to the steering handle (16) in a torque-transmitting manner. The force feedback unit (18) has an electric motor (50) and a pinion (56) which is coupled to the electric motor (50) in a torque-transmitting manner and is in toothed engagement with a toothing system (38) of the bearing unit (14), in order to drive the steering handle (16) in the circumferential direction (U) via the bearing unit (14).

Description

Lenkvorrichtung für Steer-by-Wire-Lenksystem Steering device for steer-by-wire steering system
Die Erfindung betrifft eine Lenkvorrichtung für ein Steer-by-Wire-Lenksystem eines Kraftfahrzeugs, mit einer Lenkhandhabe, einer Kraftrückkopplungseinheit und einem feststehenden Träger. The invention relates to a steering device for a steer-by-wire steering system of a motor vehicle, with a steering handle, a force feedback unit and a fixed support.
Lenkvorrichtungen für Steer- by- Wire- Lenksysteme sind bekannt. Steering devices for steer-by-wire steering systems are known.
Im Unterschied zu klassischen Lenkvorrichtungen, bei denen die Lenkbewegung des Fahrers über eine Lenksäule an den mit den Rädern gekoppelten Lenksteller mechanisch übertragen wird, wird die Lenkbewegung bei Steer-by- Wi re- Lenksystem en signalübertragend übertragen. Die Kraftrückkopplungseinheit, auch Force-Feedback-Einheit genannt, ist hierbei dazu vorgesehen, dass durch den Wegfall der Lenksäule verloren gegangene Straßengefühl über die Lenkhandhabe entsprechend der Fahrverhältnisse an den Fahrer zu übermitteln. In contrast to classic steering devices, in which the driver's steering movement is transmitted mechanically via a steering column to the steering actuator coupled to the wheels, the steering movement in steer-by-wire steering systems is transmitted via signal transmission. The force feedback unit, also called a force feedback unit, is intended to transmit road feel lost due to the elimination of the steering column to the driver via the steering handle in accordance with the driving conditions.
Derartige Lenkvorrichtungen umfassen üblicherweise ein in der Lenkhandhabe bzw. dem Lenkrad untergebrachtes Gassackmodul, um den Fahrer zu schützen. Insbesondere bei unsymmetrischen, großflächigen Lenkrad-Gassäcken gibt es die Bestrebung, das Gassackmodul raumfest zu halten, auch wenn das Lenkrad gedreht wird. Dann kann der unsymmetrische Gassack immer seine raumfeste, ideale Position einnehmen, egal ob das Kraftfahrzeug sich in einer Kurvenfahrt befindet oder geradeaus fährt. Um eine solche Drehkompensation zu erhalten, wurde das Gassackmodul von der Drehbewegung der Lenkhandhabe passiv mittels eines Getriebes oder aktiv mittels eines Stellmotors entkoppelt. Such steering devices usually include an airbag module housed in the steering handle or the steering wheel in order to protect the driver. Particularly with asymmetrical, large-area steering wheel gas bags, there is an effort to keep the gas bag module stationary, even when the steering wheel is turned. The asymmetrical gas bag can then always assume its spatially fixed, ideal position, regardless of whether the motor vehicle is cornering or driving straight ahead. In order to obtain such rotational compensation, the gas bag module was decoupled from the rotational movement of the steering handle passively using a gear or actively using a servomotor.
Bekannte Lenkvorrichtungen haben den Nachteil, dass sie sehr voluminös sind und zudem viele Einzelteile umfassen, insbesondere wenn die Lenkvorrichtung zusätzlich ein Gassackmodul mit Drehkompensation aufweist. Known steering devices have the disadvantage that they are very voluminous and also include many individual parts, especially if the steering device additionally has an airbag module with rotation compensation.
Aufgabe der Erfindung ist es daher, eine Lenkvorrichtung für ein Steer-by-Wire- Lenksystem bereitzustellen, das besonders kompakt und einfach gestaltet ist. The object of the invention is therefore to provide a steering device for a steer-by-wire steering system that is particularly compact and simple.
Die Aufgabe wird gelöst durch eine Lenkvorrichtung für ein Steer-by-Wire- Lenksystem eines Kraftfahrzeugs, mit einer Lenkhandhabe, einer Kraftrückkopp- lungseinheit, einem feststehenden Träger, der einen sich in axialer Richtung erstreckenden Aufnahmetopf für einen Gassack hat, und einer Lagereinheit, mittels der die Lenkhandhabe in Umfangsrichtung um die axiale Richtung drehbar am Aufnahmetopf gelagert ist. Die Lagereinheit hat eine Verzahnung und ist mit der Lenkhandhabe drehmomentübertragend gekoppelt. Ferner hat die Kraftrückkopplungseinheit einen Elektromotor und ein mit dem Elektromotor drehmomentübertragend gekoppeltes Ritzel, das mit der Verzahnung in verzahntem Eingriff steht, um über die Lagereinheit die Lenkhandhabe in Umfangsrichtung anzutreiben. Im Sinne der Erfindung wird unter dem Begriff „feststehend“ bzw. unter einem „feststehenden“ Träger ein Träger verstanden, der fahrzeugfest im Kraftfahrzeug angeordnet ist, insbesondere während der Fahrt. Der feststehende Träger kann jedoch mittels eines Verstellmechanismus verstellbar sein, um die Lenkhandhabe gegenüber dem Fahrer auszurichten und somit den Komfort zu erhöhen. Mit anderen Worten handelt es sich bei dem feststehenden Träger im Gegensatz zu einer klassischen Lenkvorrichtung nicht um eine in Umfangsrichtung drehbar gelagerte Lenksäule, auch wenn der feststehende Träger ähnlich zur Lenksäule höhen- und/ oder längsverstellbar sein kann, um den Komfort des Fahrers zu verbessern. The task is solved by a steering device for a steer-by-wire steering system of a motor vehicle, with a steering handle, a force feedback unit, a fixed carrier which has an axially extending receiving pot for an airbag, and a storage unit, by means of which the steering handle is mounted on the receiving pot so that it can rotate in the circumferential direction about the axial direction. The bearing unit has teeth and is coupled to the steering handle in a torque-transmitting manner. Furthermore, the force feedback unit has an electric motor and a pinion which is coupled to the electric motor in a torque-transmitting manner and which is in toothed engagement with the toothing in order to drive the steering handle in the circumferential direction via the bearing unit. For the purposes of the invention, the term “fixed” or a “fixed” carrier is understood to mean a carrier that is arranged fixed to the vehicle in the motor vehicle, in particular while driving. However, the fixed support can be adjustable by means of an adjustment mechanism in order to align the steering handle with respect to the driver and thus increase comfort. In other words, in contrast to a classic steering device, the fixed support is not a steering column that is rotatably mounted in the circumferential direction, even if the fixed support can be height and / or length-adjustable similar to the steering column in order to improve the driver's comfort.
Es wurde erfindungsgemäß erkannt, dass die Lenkvorrichtung auf diese Weise mit wenigen Bauteilen sowie besonders raumsparend und somit kompakt gestaltet sein kann. Ferner hat diese Gestaltung den Vorteil, dass der Gassack im Aufnahmetopf feststehend im Kraftfahrzeug angeordnet ist und hierdurch asymmetrische und sogar beliebig gestaltbare Gassäcke vorgesehen sein können, die unabhängig von der Lenkstellung der Lenkhandhabe stets dieselbe Schutzwirkung bereitstellen können. It was recognized according to the invention that the steering device can be designed in this way with few components and in a particularly space-saving and therefore compact manner. Furthermore, this design has the advantage that the gas bag is arranged in a fixed manner in the receiving pot in the motor vehicle and as a result, asymmetrical and even arbitrarily designed gas bags can be provided, which can always provide the same protective effect regardless of the steering position of the steering handle.
In einer Ausführungsform ist die Verzahnung eine Innenverzahnung, wodurch die Lenkvorrichtung noch kompakter gestaltet sein kann, insbesondere in radialer Richtung, da der Elektromotor zumindest abschnittsweise radial innerhalb der Lagereinheit, insbesondere radial innerhalb einer Außenschale der Lagereinheit angeordnet sein kann. In one embodiment, the toothing is an internal toothing, whereby the steering device can be designed to be even more compact, in particular in the radial direction, since the electric motor can be arranged at least in sections radially within the bearing unit, in particular radially within an outer shell of the bearing unit.
Zusätzlich oder alternativ kann vorgesehen sein, dass zumindest der Stator und der Rotor des Elektromotors in axialer Richtung außerhalb der Lagereinheit, vorzugsweise außerhalb einer Außenschale der Lagereinheit, angeordnet sind, insbesondere axial außerhalb der Lenkhandhabe. Auf diese Weise kann die Außenschale kompakter gestaltet sein, da kein Raum zur Aufnahme des Elektromotors in der Außenschale bereitgestellt werden muss. Da am Rotor ein Wellenzapfen befestigt ist, auf dem das Ritzel sitzt oder das Rätsel ausgearbeitet ist, ist dieser Wellenzapfen definitionsgemäß nicht Teil des Rotors. Das Ende des Wellenzapfens, auf dem das Ritzel befestigt ist, kann somit in den durch die Lenkhandhabe umschriebenen Raum, also ihr hohles Inneres, hineinragen. Additionally or alternatively, it can be provided that at least the stator and the rotor of the electric motor are arranged in the axial direction outside the bearing unit, preferably outside an outer shell of the bearing unit, in particular axially outside the steering handle. In this way, the outer shell can be designed to be more compact since there is no space to accommodate the Electric motor must be provided in the outer shell. Since there is a shaft journal attached to the rotor on which the pinion sits or the puzzle is worked out, this shaft journal is by definition not part of the rotor. The end of the shaft journal, on which the pinion is attached, can therefore protrude into the space defined by the steering handle, i.e. its hollow interior.
In einer weiteren Ausführungsform weist die Kraftrückkopplungseinheit einen Sekundärelektromotor auf, der ein mit dem Sekundärelektromotor drehmomentübertragend gekoppeltes zweites Ritzel hat, das mit der Verzahnung in verzahntem Eingriff steht, um über die Lagereinheit, insbesondere eine Außenschale der Lagereinheit, die Lenkhandhabe in Umfangsrichtung anzutreiben. Der Sekundärelektromotor ist hierbei analog zum primären Elektromotor gestaltet und kann insbesondere die gleichen Funktionen bereitstellen. Dies hat den Vorteil, dass die beiden Elektromotoren jeweils kleiner ausgelegt sein können als bei Verwendung eines einzelnen Elektromotors, wodurch die Lenkvorrichtung kompakter gestaltet sein kann. Ferner kann die Lenkvorrichtung derart gestaltet sein, dass bei Ausfall eines der beiden Elektromotoren die Lenkvorrichtung mittels des anderen Elektromotors weiter sicher betrieben werden kann. Durch diese Redundanz wird eine besonders hohe Funktionssicherheit der Lenkvorrichtung und somit des Steer-by-Wire-Lenksystem gewährleistet. In a further embodiment, the force feedback unit has a secondary electric motor which has a second pinion coupled to the secondary electric motor in a torque-transmitting manner and which is in toothed engagement with the toothing in order to drive the steering handle in the circumferential direction via the bearing unit, in particular an outer shell of the bearing unit. The secondary electric motor is designed in a similar way to the primary electric motor and can in particular provide the same functions. This has the advantage that the two electric motors can each be designed smaller than when using a single electric motor, which means that the steering device can be designed more compactly. Furthermore, the steering device can be designed in such a way that if one of the two electric motors fails, the steering device can continue to be operated safely by means of the other electric motor. This redundancy ensures a particularly high level of functional reliability of the steering device and thus of the steer-by-wire steering system.
Bevorzugt weist die Lagereinheit eine Innenschale, die drehfest am Träger befestigt ist, und eine Außenschale mit der Verzahnung auf, wobei die Außenschale an der Innenschale und drehbar am Aufnahmetopf gelagert ist und mit der Lenkhandhabe drehmomentübertragend gekoppelt ist, wobei das Ritzel mit der Verzahnung in verzahntem Eingriff steht, um über die Außenschale der Lagereinheit die Lenkhandhabe in Umfangsrichtung anzutreiben. Preferably, the bearing unit has an inner shell, which is non-rotatably attached to the carrier, and an outer shell with the teeth, wherein the outer shell is mounted on the inner shell and rotatably on the receiving pot and is coupled to the steering handle in a torque-transmitting manner, the pinion being in mesh with the teeth Intervention is available to drive the steering handle in the circumferential direction via the outer shell of the bearing unit.
Mit Bezug auf den Sekundärelektromotor kann analog zum primären Elektromotor vorgesehen sein, dass zumindest der Stator und der Rotor des Sekundärelektromotors in axialer Richtung außerhalb der Außenschale angeordnet sind, insbesondere außerhalb der Lenkhandhabe. Auch hier gilt, dass das Ende des Wellenzapfens, auf dem das Ritzel befestigt ist, in den durch die Lenkhabe umschriebenen Raum, also ihr hohles Inneres, hineinragen kann, weil der Wellenzapfen zwar am Rotor befestigt, aber ihm nicht zugerechnet wird. Des Weiteren kann die Innenschale am Aufnahmetopf befestigt sein, um die Verbindung der Lagereinheit mit dem Träger besonders kompakt zu gestalten. With regard to the secondary electric motor, analogous to the primary electric motor, it can be provided that at least the stator and the rotor of the secondary electric motor are arranged in the axial direction outside the outer shell, in particular outside the steering handle. Here too, the end of the shaft journal on which the pinion is attached can protrude into the space defined by the steering handle, i.e. its hollow interior, because the shaft journal is attached to the rotor but is not included in it. Furthermore, the inner shell can be attached to the receiving pot in order to make the connection of the storage unit to the carrier particularly compact.
Gemäß einer Ausführungsform ist die Außenschale mittels eines Lagers an der Innenschale drehbar gelagert. Das Lager ist dabei ein Nadellager, Kugellager und/oder Gleitlager, die besonders zuverlässig und kostengünstig sind und zudem sehr kompakt gestaltet sein können. According to one embodiment, the outer shell is rotatably mounted on the inner shell by means of a bearing. The bearing is a needle bearing, ball bearing and/or plain bearing, which are particularly reliable and cost-effective and can also be designed to be very compact.
Gemäß einer weiteren Ausführungsform weist die Lenkvorrichtung einen Gasgenerator zum Aufblasen des Gassacks auf. Der Gasgenerator ist hierbei außerhalb des Aufnahmetopfs, insbesondere im Träger, angeordnet. Auf diese Weise kann der Aufnahmetopf kleiner gestaltet sein, da kein Bauraum für den Gasgenerator vorgehalten werden muss. According to a further embodiment, the steering device has a gas generator for inflating the gas bag. The gas generator is arranged outside the receiving pot, in particular in the carrier. In this way, the receiving pot can be made smaller, since no installation space has to be reserved for the gas generator.
Ferner kann die Lenkvorrichtung eine Lenkwinkelsensoreinheit haben. Insbesondere bildet hierbei der Elektromotor und/oder der Sekundärelektromotor einen Sensor der Lenkwinkelsensoreinheit, wodurch der Elektromotor und/oder der Sekundärelektromotor mehrere Funktionen in sich vereinen und somit die Lenkvorrichtung aus weniger Bauteilen bestehen kann. Furthermore, the steering device can have a steering angle sensor unit. In particular, the electric motor and/or the secondary electric motor forms a sensor of the steering angle sensor unit, whereby the electric motor and/or the secondary electric motor combines several functions and thus the steering device can consist of fewer components.
Des Weiteren kann vorgesehen sein, dass die Lenkhandhabe mittels eines insbesondere werkzeugfrei bedienbaren Schnellverschlusses an der Außenschale befestigt ist. Diese Gestaltung hat den Vorteil, dass die Lenkhandhabe mit geringem Aufwand und in kurzer Zeit auswechselbar ist. Indem die Lenkhandhabe an der Außenschale befestigt ist, kann die Lenkvorrichtung ferner besonders kompakt gestaltet sein. Furthermore, it can be provided that the steering handle is attached to the outer shell by means of a quick-release fastener that can be operated in particular without tools. This design has the advantage that the steering handle can be replaced with little effort and in a short time. By attaching the steering handle to the outer shell, the steering device can also be designed to be particularly compact.
In einer Ausführungsform hat die Lenkvorrichtung ein der Lenkhandhabe zugeordnetes Funktionselement, das drehfest mit der Innenschale bzw. dem Träger verbunden ist. Das Funktionselement weist dabei ein Display und/oder ein oder mehrere Schalter auf, die auf diese Weise feststehend im Kraftfahrzeug angeordnet sind und somit unabhängig von der Stellung der Lenkhandhabe stets dieselbe Ausrichtung haben. Hierdurch ist der Anzeigeinhalt des Displays immer komfortabel zu erfassen und die Schalter sind immer an derselben Stelle angeordnet, wodurch eine Fehlbedienung vermieden wird. In one embodiment, the steering device has a functional element assigned to the steering handle, which is connected to the inner shell or the carrier in a rotationally fixed manner. The functional element has a display and/or one or more switches, which are arranged in a fixed manner in the motor vehicle and thus always have the same orientation regardless of the position of the steering handle. This means that the contents of the display can always be easily viewed and the switches are always arranged in the same place, which prevents incorrect operation.
Weitere Vorteile und Merkmale ergeben sich aus der nachfolgenden Beschreibung sowie aus den beigefügten Zeichnungen. In diesen zeigen: - Figur 1 in einer schematischen Explosionsdarstellung eine erfindungsgemäße Lenkvorrichtung für ein Steer-by-Wire-Lenksystem, und Further advantages and features can be found in the following description and the accompanying drawings. Show in these: - Figure 1 is a schematic exploded view of a steering device according to the invention for a steer-by-wire steering system, and
- Figur 2 in einer schematischen Darstellung die Lenkvorrichtung aus Figur 1.- Figure 2 shows a schematic representation of the steering device from Figure 1.
In Figur 1 ist ein Lenkvorrichtung 10 für ein Steer-by-Wire-Lenksystem eines Kraftfahrzeugs mit einem feststehenden Träger 12, eine Lagereinheit 14, einer Lenkhandhabe 16 und einer Kraftrückkopplungseinheit 18 gezeigt. 1 shows a steering device 10 for a steer-by-wire steering system of a motor vehicle with a fixed carrier 12, a bearing unit 14, a steering handle 16 and a force feedback unit 18.
Ferner hat die Lenkvorrichtung 10 ein Gassackmodul 20 mit einem Gassack 22 und einem Gasgenerator 24, der zum Aufblasen des Gassacks 22 in einem Rückhaltefall eingerichtet ist. Furthermore, the steering device 10 has a gas bag module 20 with a gas bag 22 and a gas generator 24, which is set up to inflate the gas bag 22 in a restraint situation.
Des Weiteren weist die Lenkvorrichtung 10 ein Funktionselement 26 auf, das der Lenkhandhabe 16 zugeordnet und somit zusammen mit der Lenkhandhabe 16 gegenüberliegend zu einem Fahrer im Kraftfahrzeug angeordnet sind. Das Funktionselement 26 ist in Figur 2 nicht sichtbar bzw. nicht dargestellt. Furthermore, the steering device 10 has a functional element 26, which is assigned to the steering handle 16 and is therefore arranged together with the steering handle 16 opposite a driver in the motor vehicle. The functional element 26 is not visible or not shown in FIG.
Der Träger 12 hat einen Aufnahmetopf 28, der sich in axialer Richtung A erstreckt und an einem dem Fahrzeuginneren zugewandten axialen Ende 30 offen ist. The carrier 12 has a receiving pot 28 which extends in the axial direction A and is open at an axial end 30 facing the vehicle interior.
Im Aufnahmetopf 28 ist der Gassack 22 aufgenommen, während der Gasgenerator 24 außerhalb des Aufnahmetopfs 28 am Träger 12 angeordnet ist (siehe Figur 2). The gas bag 22 is accommodated in the receiving pot 28, while the gas generator 24 is arranged outside the receiving pot 28 on the carrier 12 (see FIG. 2).
In einer alternativen Ausführungsform kann der Gasgenerator 24 außerhalb des Aufnahmetopfs 28 in einer Ausnehmung im Träger 12 aufgenommen sein. In an alternative embodiment, the gas generator 24 can be accommodated outside the receiving pot 28 in a recess in the carrier 12.
In diesem Zusammenhang ist der Gassack 22 ein Fahrergassack bzw. Frontgassack. In this context, the gas bag 22 is a driver gas bag or front gas bag.
Die Lagereinheit 14 hat eine kreiszylinderförmige Innenschale 32 und eine kreiszylinderförmige Außenschale 34 sowie ein Lager 36, mittels dem die Außenschale 34 in Umfangsrichtung U um die axiale Richtung A drehbar auf der Innenschale 32 gelagert ist. The bearing unit 14 has a circular cylindrical inner shell 32 and a circular cylindrical outer shell 34 as well as a bearing 36 by means of which the outer shell 34 is rotatably mounted on the inner shell 32 in the circumferential direction U about the axial direction A.
Das Lager 36 ist hierbei ein Nadellager, das besonders kompakt in radialer Richtung ist. In einer alternativen Ausführungsform kann das Lager 36 ein beliebiges Lager sein, insbesondere ein Kugellager oder ein Gleitlager. The bearing 36 is a needle bearing which is particularly compact in the radial direction. In an alternative embodiment, the bearing 36 can be any bearing, in particular a ball bearing or a plain bearing.
In der vorliegenden Ausführungsform ist die Innenschale 32 am Aufnahmetopf 28 angebracht. In the present embodiment, the inner shell 32 is attached to the receiving pot 28.
Des Weiteren weist die Lagereinheit 14 eine Verzahnung 38 in Form einer Innenverzahnung auf, die in axialer Richtung A entgegengesetzt zum axialen Ende 30 angeordnet ist. Furthermore, the bearing unit 14 has a toothing 38 in the form of an internal toothing, which is arranged in the axial direction A opposite to the axial end 30.
Die Außenschale 34 bildet hierbei eine Nabe für die Lenkhandhabe 16, auf der die Lenkhandhabe 16 mittels eines Schnellverschluss 40 drehfest befestigt ist. The outer shell 34 forms a hub for the steering handle 16, on which the steering handle 16 is secured in a rotationally fixed manner by means of a quick-release fastener 40.
Zu diesem Zweck weist die Lenkhandhabe 16 einen axialen Fortsatz 42 auf, der in eine komplementärgestaltete Ausnehmung 44 in der Außenschale 34 eingreift und hierdurch die Lenkhandhabe 16 mit der Außenschale 34 drehfest koppelt. For this purpose, the steering handle 16 has an axial extension 42, which engages in a complementary recess 44 in the outer shell 34 and thereby couples the steering handle 16 to the outer shell 34 in a rotationally fixed manner.
Hierbei sind der Aufnahmetopf 28, die Innenschale 32, die Außenschale 34 und die Lenkhandhabe 16 bzw. der Schnellverschluss 40 koaxial sowie in zumindest einem Abschnitt radial benachbart angeordnet. Here, the receiving pot 28, the inner shell 32, the outer shell 34 and the steering handle 16 or the quick-release fastener 40 are arranged coaxially and radially adjacent in at least one section.
Der Schnellverschluss 40 ist insbesondere werkzeugfrei bedienbar und hat hierzu beispielsweise ein Schnellspannelement (nicht dargestellt). The quick-release fastener 40 can in particular be operated without tools and has, for example, a quick-release element (not shown).
Das Funktionselement 26 ist in diesem Zusammenhang über ein entsprechend gestaltetes Trägerelement (nicht dargestellt) am Träger 12, beispielsweise am axialen Ende 30 der Innenschale 32, befestigt und somit von der Lenkhandhabe 16 entkoppelt, feststehend im Kraftfahrzeug angeordnet. In this context, the functional element 26 is attached to the carrier 12, for example at the axial end 30 of the inner shell 32, via a correspondingly designed carrier element (not shown) and is thus decoupled from the steering handle 16 and arranged in a fixed manner in the motor vehicle.
Das Funktionselement ist 26 weist der dargestellten Ausführungsform ein Display 46 sowie vier Tasten bzw. Schalter 48 auf. The functional element is 26, the embodiment shown has a display 46 and four buttons or switches 48.
Um das Aufblasen des Gassacks 22 im Rückhaltefall nicht zu behindern, kann das Funktionselement 26 in bekannter Weise aus dem Ausdehnungspfad des Gassacks 22 entfernbar befestigt sein, beispielsweise mittels einer Kappe, die weggeklappt oder abgesprengt werden kann. Die Kraftrückkopplungseinheit 18 hat einen primären Elektromotor 50 und einen Sekundärelektromotor 52 sowie eine Steuereinheit 54, die signalübertragend mit den Elektromotoren 50, 52 verbunden ist. In order not to impede the inflation of the gas bag 22 in the event of restraint, the functional element 26 can be fastened in a known manner so that it can be removed from the expansion path of the gas bag 22, for example by means of a cap that can be folded away or blown off. The force feedback unit 18 has a primary electric motor 50 and a secondary electric motor 52 as well as a control unit 54, which is connected to the electric motors 50, 52 in a signal-transmitting manner.
Der primäre Elektromotor 50 und der Sekundärelektromotor 52 sind hier identisch gestaltet. The primary electric motor 50 and the secondary electric motor 52 are designed identically.
Um die Elektromotoren 50, 52 mit der Lenkhandhabe 16 drehmomentübertragend zu koppeln, hat die Kraftrückkopplungseinheit 18 ein erstes Ritzel 56, das mit der Verzahnung 38 kämmt und drehmomentübertragend mit dem primären Elektromotor 50 verbunden ist, sowie ein zweites Ritzel 58, das mit der Verzahnung 38 kämmt und drehmomentübertragend mit dem Sekundärelektromotor 52 verbunden ist. In order to couple the electric motors 50, 52 with the steering handle 16 in a torque-transmitting manner, the force feedback unit 18 has a first pinion 56, which meshes with the toothing 38 and is connected to the primary electric motor 50 in a torque-transmitting manner, and a second pinion 58, which is connected to the toothing 38 meshes and is connected to the secondary electric motor 52 in a torque-transmitting manner.
In diesem Zusammenhang sind die Elektromotoren 50, 52 relativ zum Aufnahmetopf 28 axial entgegengesetzt zum axialen Ende 30 angeordnet und zwar derart, dass zumindest der Stator und der Rotor (nicht dargestellt) jedes Elektromotors 50, 52 in axialer Richtung A außerhalb der Lagereinheit 14 und der Lenkhandhabe 16 angeordnet sind. In this context, the electric motors 50, 52 are arranged relative to the receiving pot 28 axially opposite to the axial end 30 in such a way that at least the stator and the rotor (not shown) of each electric motor 50, 52 are outside the bearing unit 14 and the in the axial direction A Steering handle 16 are arranged.
Ferner ist die Lenkvorrichtung 10 derart gestaltet, dass die Elektromotoren 50, 52 radial nicht über die Außenschale 34 hinausragen (siehe Figur 2). Furthermore, the steering device 10 is designed such that the electric motors 50, 52 do not protrude radially beyond the outer shell 34 (see Figure 2).
Wie in Figur 2 dargestellt ist, sind die Elektromotoren 50, 52 in der vorliegenden Ausführungsform radial innerhalb der Außenschale 34 angeordnet, insbesondere vollständig. As shown in Figure 2, the electric motors 50, 52 in the present embodiment are arranged radially inside the outer shell 34, in particular completely.
Die Steuereinheit 54 kann Teil eines Bordcomputers des Kraftfahrzeugs sein bzw. durch diesen gebildet werden. The control unit 54 can be part of an on-board computer of the motor vehicle or can be formed by it.
In der vorliegenden Ausführungsform sind die Steuereinheit 54 und die Elektromotoren 50, 52 ferner Teil einer Lenkwinkelsensoreinheit 60 der Lenkvorrichtung 10, die dazu eingerichtet ist, die Lenkbewegung der Lenkhandhabe 16 zu erfassen. In the present embodiment, the control unit 54 and the electric motors 50, 52 are also part of a steering angle sensor unit 60 of the steering device 10, which is set up to detect the steering movement of the steering handle 16.
Die Lenkbewegung der Lenkhandhabe 16 wird dabei mittels der Außenschale 34 über die Verzahnung 38 an die Elektromotoren 50, 52 übertragen und mittels der Steuereinheit 54 erfasst. Hierbei bilden die Elektromotoren 50, 52 jeweils einen Lenkwinkelsensor der Lenkwinkelsensoreinheit 60. In einer alternativen Ausführungsform kann die Lenkvorrichtung 10 eine Lenkwinkelsensoreinheit 60 mit einer separaten Steuereinheit und/oder zumindest einem separaten Lenkwinkelsensor aufweisen, der dazu eingerichtet ist, die Lenkbewegung der Lenkhandhabe 16 zu erfassen. Auf diese Weise ist eine Lenkvorrichtung 10 für ein Steer-by-Wire-Lenksystem eines Kraftfahrzeugs bereitgestellt, die besonders kompakt gestaltet ist. The steering movement of the steering handle 16 is transmitted to the electric motors 50, 52 by means of the outer shell 34 via the toothing 38 and detected by the control unit 54. Here, the electric motors 50, 52 each form a steering angle sensor of the steering angle sensor unit 60. In an alternative embodiment, the steering device 10 may have a steering angle sensor unit 60 with a separate control unit and/or at least one separate steering angle sensor, which is set up to detect the steering movement of the steering handle 16. In this way, a steering device 10 is provided for a steer-by-wire steering system of a motor vehicle, which is designed to be particularly compact.
Ferner sind der Gassack 22 und das Funktionselement 26 feststehend und somit unabhängig von der Lenkbewegung bzw. Winkelstellung der Lenkhandhabe 16 in Umfangsrichtung U angeordnet. Die Erfindung ist nicht auf die gezeigte Ausführungsform beschränkt. Insbesondere können einzelne Merkmale einer Ausführungsform beliebig mit Merkmalen anderer Ausführungsformen kombiniert werden, insbesondere unabhängig von den anderen Merkmalen der entsprechenden Ausführungsformen. Furthermore, the gas bag 22 and the functional element 26 are stationary and thus arranged in the circumferential direction U independently of the steering movement or angular position of the steering handle 16. The invention is not limited to the embodiment shown. In particular, individual features of one embodiment can be combined as desired with features of other embodiments, in particular independently of the other features of the corresponding embodiments.

Claims

Patentansprüche Patent claims
1. Lenkvorrichtung (10) für ein Steer-by-Wire-Lenksystem eines Kraftfahrzeugs, mit einer Lenkhandhabe (16), einer Kraftrückkopplungseinheit (18), einem feststehenden Träger (12), der einen sich in axialer Richtung (A) erstreckenden Aufnahmetopf (28) für einen Gassack (22) hat, und einer Lagereinheit (14), mittels der die Lenkhandhabe (16) in Umfangsrichtung (U) um die axiale Richtung (A) drehbar am Aufnahmetopf (28) gelagert ist, wobei die Lagereinheit (14) eine Verzahnung (38) hat und mit der Lenkhandhabe (16) drehmomentübertragend gekoppelt ist, wobei die Kraftrückkopplungseinheit (18) einen Elektromotor (50) und ein mit dem Elektromotor (50) drehmomentübertragend gekoppeltes Ritzel (56) hat, das mit der Verzahnung (38) in verzahntem Eingriff steht, um über die Lagereinheit (14) die Lenkhandhabe (16) in Umfangsrichtung (U) anzutreiben. 1. Steering device (10) for a steer-by-wire steering system of a motor vehicle, with a steering handle (16), a force feedback unit (18), a fixed support (12) which has a receiving pot (A) extending in the axial direction (A). 28) for an airbag (22), and a bearing unit (14), by means of which the steering handle (16) is rotatably mounted on the receiving pot (28) in the circumferential direction (U) about the axial direction (A), the bearing unit (14 ) has a toothing (38) and is coupled to the steering handle (16) in a torque-transmitting manner, the force feedback unit (18) having an electric motor (50) and a pinion (56) which is coupled to the electric motor (50) in a torque-transmitting manner and which is connected to the toothing ( 38) is in toothed engagement in order to drive the steering handle (16) in the circumferential direction (U) via the bearing unit (14).
2. Lenkvorrichtung (10) nach Anspruch 1 , dadurch gekennzeichnet, dass die Verzahnung (38) eine Innenverzahnung ist. 2. Steering device (10) according to claim 1, characterized in that the toothing (38) is an internal toothing.
3. Lenkvorrichtung (10) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zumindest der Stator und der Rotor des Elektromotors (50) in axialer Richtung (A) außerhalb der Lagereinheit (14) angeordnet sind, insbesondere außerhalb der Lenkhandhabe (16). 3. Steering device (10) according to claim 1 or 2, characterized in that at least the stator and the rotor of the electric motor (50) are arranged in the axial direction (A) outside the bearing unit (14), in particular outside the steering handle (16).
4. Lenkvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kraftrückkopplungseinheit (18) einen Sekundärelektromotor (52) aufweist, der ein mit dem Sekundärelektromotor (52) drehmomentübertragend gekoppeltes zweites Ritzel (58) hat, das mit der Verzahnung (38) in verzahntem Eingriff steht, um über die Lagereinheit (14) die Lenkhandhabe (16) in Umfangsrichtung (U) anzutreiben. 4. Steering device (10) according to one of the preceding claims, characterized in that the force feedback unit (18) has a secondary electric motor (52) which has a second pinion (58) which is coupled to the secondary electric motor (52) in a torque-transmitting manner and which is connected to the toothing ( 38) is in toothed engagement in order to drive the steering handle (16) in the circumferential direction (U) via the bearing unit (14).
5. Lenkvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lagereinheit (14) eine Innenschale (32), die drehfest am Träger (12) befestigt ist, und eine Außenschale (34) mit der Verzahnung (38) hat, wobei die Außenschale (34) an der Innenschale (32) und drehbar am Aufnahmetopf (28) gelagert ist und mit der Lenkhandhabe (16) drehmomentübertragend gekoppelt ist, wobei das Ritzel (56, 58) mit der Verzahnung (38) in verzahntem Eingriff steht, um über die Außenschale (34) der Lagereinheit (14) die Lenkhandhabe (16) in Umfangsrichtung (U) anzutreiben. 5. Steering device (10) according to one of the preceding claims, characterized in that the bearing unit (14) has an inner shell (32) which is fixedly secured to the carrier (12) in a rotationally fixed manner, and an outer shell (34) with the Toothing (38), wherein the outer shell (34) is mounted on the inner shell (32) and rotatably on the receiving pot (28) and is coupled to the steering handle (16) in a torque-transmitting manner, wherein the pinion (56, 58) is in toothed engagement with the toothing (38) in order to drive the steering handle (16) in the circumferential direction (U) via the outer shell (34) of the bearing unit (14).
6. Lenkvorrichtung (10) nach Anspruch 5, dadurch gekennzeichnet, dass die Innenschale (32) am Aufnahmetopf (28) befestigt ist. 6. Steering device (10) according to claim 5, characterized in that the inner shell (32) is attached to the receiving pot (28).
7. Lenkvorrichtung (10) nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass die Außenschale (34) mittels eines Lagers (36) an der Innenschale (32) drehbar gelagert ist, wobei das Lager (36) ein Nadellager, Kugellager und/oder Gleitlager ist. 7. Steering device (10) according to claim 5 or 6, characterized in that the outer shell (34) is rotatably mounted on the inner shell (32) by means of a bearing (36), the bearing (36) being a needle bearing, ball bearing and / or Plain bearing is.
8. Lenkvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lenkvorrichtung (10) einen Gasgenerator (24) zum Aufblasen des Gassacks (22) aufweist, wobei der Gasgenerator (24) außerhalb des Aufnahmetopfs (28), insbesondere im Träger (12), angeordnet ist. 8. Steering device (10) according to one of the preceding claims, characterized in that the steering device (10) has a gas generator (24) for inflating the gas bag (22), wherein the gas generator (24) is arranged outside the receiving pot (28), in particular in the carrier (12).
9. Lenkvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lenkvorrichtung (10) eine Lenkwinkelsensoreinheit (60) hat, insbesondere wobei der Elektromotor (50) und/oder der Sekundärelektromotor (52) einen Sensor der Lenkwinkelsensoreinheit (60) bildet. 9. Steering device (10) according to one of the preceding claims, characterized in that the steering device (10) has a steering angle sensor unit (60), in particular wherein the electric motor (50) and / or the secondary electric motor (52) has a sensor of the steering angle sensor unit (60) forms.
10. Lenkvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lenkhandhabe (16) mittels eines insbesondere werkzeugfrei bedienbaren Schnellverschlusses (40) an der Außenschale (34) befestigt ist. 10. Steering device (10) according to one of the preceding claims, characterized in that the steering handle (16) is attached to the outer shell (34) by means of a quick-release fastener (40) which can be operated in particular without tools.
11. Lenkvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lenkvorrichtung (10) ein der Lenkhandhabe (16) zugeordnetes Funktionselement (26) hat, das drehfest mit der Innenschale (32) verbunden ist, wobei das Funktionselement (26) ein Display (46) und/oder ein oder mehrere Schalter (48) aufweist. 11. Steering device (10) according to one of the preceding claims, characterized in that the steering device (10) has a functional element (26) assigned to the steering handle (16), which is connected to the inner shell (32) in a rotationally fixed manner, the functional element (26 ) has a display (46) and / or one or more switches (48).
PCT/EP2023/075880 2022-09-22 2023-09-20 Steering device for steer-by-wire steering system WO2024061947A1 (en)

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DE102006003654A1 (en) * 2006-01-26 2007-10-11 Zf Lenksysteme Gmbh Steering shaft for a steering wheel with fixed steering hub and power source
DE102017207272A1 (en) * 2017-04-28 2018-10-31 Volkswagen Aktiengesellschaft Steering handle
WO2021089583A1 (en) * 2019-11-08 2021-05-14 Ivan Tochev Arrangement of a steering device

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