A steering device for a motor vehicle has a steering wheel which is connected in a rotationally fixed fashion to a steering shaft which is continuously hollow and through which at least an electrical conductor is led in order to make electrical connection with steering-wheel-side equipment. The cond
A steering device for a motor vehicle has a steering wheel which is connected in a rotationally fixed fashion to a steering shaft which is continuously hollow and through which at least an electrical conductor is led in order to make electrical connection with steering-wheel-side equipment. The conductor, in particular flexible conductor tracks, highly flexible cables, and/or flat conductor ribbons, is guided in an axial direction through the entire steering shaft, and emerges therefrom at the two ends of the steering shaft, and is surrounded essentially by a protective device. The protective device has two protective tubes which can be changed in length in the axial direction, in particular by moving them in and out in a telescopic fashion.
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1. A steering device for a motor vehicle equipped with a steering wheel connected in a rotationally rigid manner to a steering shaft that is hollow from end-to-end, comprising: an electrical conductor operatively configured to extend from end-to-end through the hollow steering shaft, one end of the
1. A steering device for a motor vehicle equipped with a steering wheel connected in a rotationally rigid manner to a steering shaft that is hollow from end-to-end, comprising: an electrical conductor operatively configured to extend from end-to-end through the hollow steering shaft, one end of the electrical conductor being operatively configured to make an electrical connection with equipment on a steering wheel side of the steering shaft,a protective device surrounding the electrical conductor, the protective device comprising two protective tubes; andwherein a length of the protective device and a length of the electrical conductor are axially variable by movement of the two protective tubes. 2. The steering device according to claim 1, wherein the two protective tubes comprise an outer and an inner tube, the outer and the inner tubes being slidable axially with respect to one another in a telescoping manner. 3. The steering device according to claim 2, wherein the outer and the inner tubes are securable to one another in axial and circumferential directions. 4. The steering device according to claim 3, wherein the two tubes are secured to one another in the axial and the circumferential direction in an axially totally extended position of the two tubes relative to one another. 5. The steering device according to claim 3, wherein the two tubes are securable to one another in at least one of a friction locking and positive locking manner. 6. The steering device according to claim 3, wherein the two tubes are securable to one another via a bayonet lock. 7. The steering device according to claim 3, wherein the two tubes are secured to one another in the circumferential and axial directions via axially directed circumferential grooves and/or a snap cam on the inner tube that interacts with a latching nose on the outer tube. 8. The steering device according to claim 5, wherein the at least one of the friction lock and positive lock connection of the inner and outer tubes is manually releasable at least from an end of the protective device on the steering wheel side. 9. The steering device according to claim 1, further comprising: an end module configured at an end of the protective device facing away from the steering wheel; andwherein the electrical conductor is fixed in an axial and a radial direction via the end module, the end module being securable against rotation of the steering shaft. 10. The steering device according to claim 9, further comprising: an additional end module configured at an end of the protective device facing the steering wheel; andwherein the electrical conductor is fixed in an axial and a radial direction via the additional end module, the additional end module being rotatable with the steering shaft. 11. The steering device according to claim 10, further comprising: an electrical connector fastened to the end of the electrical conductor that faces away from the steering wheel; andwherein the electrical connector is operatively configured to be fixed at least in an axial direction in the end module such that an electrical coupling is automatically made with a corresponding electrical connector arranged on the vehicle during installation of the end module. 12. The steering device according to claim 10, wherein a length of the electrical conductor between the end module and the additional end module is greater than a distance between the end module and the additional end module. 13. The steering device according to claim 1, wherein the electrical conductor comprises a plurality of electrical conductors accommodated on a conductor carrier so as to be electrically insulated from one another. 14. The steering device according to claim 1, further comprising: a steering gearbox of the vehicle; andwherein the steering device does not have a mechanical drive connection between the steering wheel and the steering gearbox. 15. The steering device according to claim 14, further comprising: an actuator operatively configured to drive the steering gearbox; andwherein the actuator is actuated via output signals produced as a function of actuation of the steering wheel. 16. The steering device according to claim 15, further comprising: a hydraulic actuating unit operatively coupled with the steering gearbox;a hydraulic feed unit that acts upon the hydraulic actuating unit and is controlled via the steering wheel; andwherein the hydraulic actuating unit and the hydraulic feed unit form a default steering device in an event of a malfunction of the actuator in order to control steering via a hydraulic connection between the hydraulic feed unit and the hydraulic actuating unit. 17. The steering device according to claim 10, wherein the end module, the additional end module, the protective device, and the electrical conductor are configured as a preassembled unit. 18. The steering device according to claim 17, wherein the preassembled unit has the inner and outer tubes of the protective device secured relative to one another in a circumferential direction such that a position of the end module relative to the additional end module is fixed in a central position based on a capacity of the electrical conductor to twist in both directions from the central position, which central position corresponds to a straight ahead driving position of the steering wheel. 19. A method for assembling a steering device in a motor vehicle in order to make an electrical connection for electrical equipment on a steering wheel side of the steering device, the motor vehicle being equipped with a hollow steering shaft through which at least one electrical conductor is guided, the method comprising the acts of: preassembling a steering wheel unit comprising an end module, an additional end module, the electrical conductor having electrical connectors at each end, and a protective device connecting the end module and the additional end module, which protective device comprises two tubes slidable inside one another in an axially telescoping manner and being securable to one another via an anti-rotation and anti-displacement securing device;inserting the pre-assembled steering wheel unit with the tubes secured to one another in an axial direction into the hollow steering shaft until the end module is placed such that it is permanently attachable to the vehicle via a positive lock;releasing the anti-rotation and anti-displacement securing device between the two tubes of the protective device;sliding, in a telescopic manner, the two tubes of the protective device up to a stop on a steering wheel bottom and securing the additional end module such that it is fixed on the steering wheel; andelectrically contacting the electrical connectors of the electrical conductor with corresponding contact terminals. 20. The method according to claim 19, wherein corresponding electrical connectors that are secured on the vehicle are aligned with the electrical connectors on the end module of the pre-assembled unit such that an electrical coupling is made automatically when the positive lock of the end module to the vehicle is produced.
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이 특허에 인용된 특허 (4)
Hoblingre Andr (Valentigney FRX), Rapid fastener of the bayonet type.
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