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CN-116534112-B - Steering column for a motor vehicle

CN116534112BCN 116534112 BCN116534112 BCN 116534112BCN-116534112-B

Abstract

The invention relates to a steering column for a motor vehicle, comprising a housing unit in which a steering spindle is mounted rotatably about a longitudinal axis extending in a longitudinal direction and which comprises at least two housing tubes which are adjustable telescopically relative to one another in the longitudinal direction, the steering column comprising a roller guide with at least one bearing support, which roller guide is radially displaceable on a first housing tube and in which at least one roller is mounted rotatably about a roller axis transverse to the longitudinal axis and in which the roller can roll in the longitudinal direction on a second housing tube by means of the outer circumference of the roller, wherein a pretensioning device interacts with the bearing support to pretension the roller against the second housing tube. The invention proposes that the bearing support is guided on the first housing tube with a tilt inclination relative to the longitudinal axis, and that the pretensioning device is designed to apply an axial force to the bearing support.

Inventors

  • THOMAS REICH

Assignees

  • 蒂森克虏伯普利斯坦股份公司
  • 蒂森克虏伯股份公司

Dates

Publication Date
20260505
Application Date
20230131
Priority Date
20220202

Claims (13)

  1. 1. Steering column (1) for a motor vehicle, comprising a housing unit (2), in which housing unit (2) a steering spindle (3) is mounted rotatably about a longitudinal axis (L) extending in a longitudinal direction, and which housing unit (2) comprises at least two housing tubes (21, 22, 23) which are adjustable telescopically relative to each other in the longitudinal direction, the steering column comprising a roller guide with at least one bearing support (51), which roller guide is radially displaceable on a first housing tube (21), and in which roller guide at least one roller (6) is mounted rotatably about a roller axis (61) transverse to the longitudinal axis (L), and in which roller guide the roller (6) is rotatable in the longitudinal direction on a second housing tube (22) by its outer circumference, wherein a pretensioning device (5) interacts with the bearing support (51) to pretension the roller (6) against the second housing tube (22), It is characterized in that the method comprises the steps of, The bearing support (51) is guided on the first housing tube (21) with a tilting inclination towards the longitudinal axis (L), and the pretensioning device (5) is designed to apply an axial force to the bearing support (51).
  2. 2. Steering column according to claim 1, characterized in that the bearing support (51) and the first casing tube (21) have corresponding conically arranged guiding surfaces (54, 24).
  3. 3. Steering column according to claim 2, characterized in that at least one guide surface (24) is formed plastically on the first casing tube (21).
  4. 4. A steering column according to any of the preceding claims 2 and 3, characterized in that at least one conical guiding surface (24) is formed on the outside of the inner shell tube or on the inside of the outer shell tube.
  5. 5. A steering column according to any one of the preceding claims 1-3, characterized in that the bearing support (51) has an annular form and is arranged coaxially with the longitudinal axis (L) at least in some parts.
  6. 6. A steering column according to any one of the preceding claims 1-3, characterized in that at least one roller (6) is held by the bearing support (51) in a radially elastic manner.
  7. 7. A steering column according to any of the preceding claims 1-3, characterized in that a plurality of rollers (6) are distributed in the circumferential direction.
  8. 8. A steering column according to any one of the preceding claims 1-3, characterized in that an axially fixed, radially protruding counter-support (56) is attached to the first casing tube (21), the bearing support (51) being axially supported against the counter-support (56).
  9. 9. Steering column according to claim 8, characterized in that a spring element (55) is arranged axially between the counter-support (56) and the bearing support (51).
  10. 10. A steering column according to any one of the preceding claims 1-3, characterized in that the two bearing supports (51) are axially spaced apart in mirror image on the first casing tube (21).
  11. 11. A steering column according to any of the preceding claims 1-3, characterized in that the first shell tube (21) is an inner shell tube (21) and the rollers (6) are biased radially outwards against an outer shell tube.
  12. 12. Steering column according to one of the preceding claims 1-3, characterized in that the shell unit (2) comprises three or more telescopically telescopic shell tubes (21, 22, 23).
  13. 13. Steering column according to one of the preceding claims 1-3, characterized in that the bearing support (51) comprises a molded plastic part.

Description

Steering column for a motor vehicle Technical Field The invention relates to a steering column for a motor vehicle, comprising a housing unit in which a steering spindle is mounted rotatably about a longitudinal axis extending in a longitudinal direction and which comprises at least two housing tubes which are adjustable telescopically relative to one another in the longitudinal direction, the steering column comprising a roller guide with at least one bearing support, which is displaceable radially on a first housing tube and in which at least one roller is mounted rotatably about a roller axis transverse to the longitudinal axis and in which the roller can roll in the longitudinal direction on a second housing tube by means of the outer circumference of the roller, wherein a pretensioning device interacts with the bearing support to pretension the roller against the second housing tube. Background Steering columns for motor vehicles comprise a housing unit in which a steering spindle is mounted rotatably about its longitudinal axis. A steering wheel or another manual steering handle for introducing a steering command by the driver is attached at the end of the steering spindle that is located behind the direction of travel and faces the driver. The shell unit is held by a support unit fastened to the vehicle body. By adjusting the housing unit relative to the support unit, the position of the steering wheel relative to the vehicle body can be set. The longitudinal adjustment, in which the steering wheel can be adjusted axially forward or backward in the longitudinal direction, i.e. in the direction of the longitudinal axis, relative to the position of the driver, can be achieved by the telescopic configuration of the housing unit. In a simple embodiment, such a telescopic device may comprise an inner shell tube or an inner shell tube which protrudes into the outer shell tube or the outer shell tube in an axially displaceable manner in the longitudinal direction. In the case of a multiple telescoping system, one or more telescoping intermediate shell tubes may additionally be interposed between the outer shell tube and the inner shell tube. In addition to the longitudinal adjustment, a further advantage is that in the event of a crash, the steering column can contract in the longitudinal direction, so that penetration of the steering column into the interior of the passenger compartment and injury to the occupants is effectively avoided. In order to achieve a telescopic device that is easily adjustable and at the same time has as little play as possible and as rigid as possible, the prior art, for example US 2019/0061804 A1, describes the arrangement of linear roller guides between adjustable shells. The linear roller guide preferably has a plurality of rollers, each roller being held on a first casing, mounted rotatably about its roller axis transverse to the longitudinal axis, and being rotatable by its outer periphery in the longitudinal direction on an adjacent second casing. For example, the first casing may be a casing pipe and the second casing may be an inner casing or an intermediate casing arranged in a telescoping manner in the casing pipe. Since the at least one roller is mounted in a bearing support which is movable in a radial direction with respect to the first casing tube and which is subjected to a radial load from the pretensioning device, the roller can be pretensioned into rolling contact with the second casing tube without play. The known pretensioning device comprises a set screw which can be screwed radially into a threaded bore in the first housing tube and which applies a radial pretensioning force elastically to the bearing support and thus to the roller via the spring element. It is advantageous here that the radially movable bearing support enables play to be eliminated, which can be maintained independently by means of the elastic pretension. However, it is disadvantageous that a relatively large installation space is required, so that the pretensioning device can actually only be arranged on the outer housing tube. In view of the above, it is an object of the present invention to achieve a smaller required installation space and a more flexible arrangement. Disclosure of Invention According to the invention, the object is achieved by a steering column having the features of one aspect. Advantageous refinements will become apparent from the other aspects. In the case of a steering column for a motor vehicle, which steering column comprises a housing unit in which a steering spindle is mounted rotatably about a longitudinal axis extending in a longitudinal direction and which housing unit comprises at least two housing tubes which are adjustable telescopically relative to one another in the longitudinal direction, the steering column comprises a roller guide with at least one bearing support, which roller guide is radially displaceable on the first housing tube and in which at l