Adjustable steering column support

The present invention relates to an adjustable steering column support.

In the case of a steering column support on the market, a bearing block has a guide rail and is made of die-cast aluminum. A slide section is located on a guide part for the steering column and is made of sheet steel. Riveted to the slide section is a bolt which is used for the fixation of a sliding block which slides in the guide rail. Compensating disks to compensate for play are situated between the bolt and the sliding block. Namely, a steering column adjustable in height and/or in angle requires guidance free from play. Usually, this can also be implemented either by separate adjusting screws or by plastic guideways extending in machined surfaces.

Disadvantageous in both these concepts is that they cannot be manufactured in a play-free manner with justifiable expenditure of time and energy, and the adjustment by screws or compensating disks is also very costly, given high production quality.

Play in the steering column support leads to complaints, since the play is multiply transferred to the steering wheel. Therefore, very high expenditure of time and energy must be put forth here to keep the steering wheel radially free from play.

An example embodiment of an adjustable steering column support according to the present invention, without mechanical processing and without adjusting screws or compensating disks, may ensure a high efficiency factor, inexpensive manufacture and freedom from play.

FIG. 1 is a schematic cross-sectional view of an intersection through parts relevant to the present invention, which is perpendicular to the longitudinal direction of a guide rail.

FIG. 2 is a schematic cross-sectional view of an intersection taken along the line II—II illustrated in FIG. 1 .

A first part in the form of a bearing block 1 includes a guide rail 11 . A second part in the form of a guide part 2 is used for accommodating a steering column. Guide rail 11 is used for guiding a slide section 21 a , 21 b , 21 c of the second part, thus of guide part 2 . Arranged between slide section 21 a , 21 b , 21 c and guide rail 11 is an elastic sliding block 3 rotationally mounted in guide part 2 and gliding in the guide rail.

Sliding block 3 glides on sliding surfaces 11 a , 11 b , 11 c of guide rail 11 . Sliding surfaces 11 b , 11 c are located on mutually opposite surfaces of a shank lid of guide rail 11 . Shank 11 d is surrounded by sliding block 3 .

A second arrangement corresponding to FIG. 1, but mirror-inverted, is provided on the other side of a mirror symmetry surface. Since the distance between a sliding surface 11 a on one side and a corresponding sliding surface of the mirror image on the other side is tolerance-encumbered, and since the distance between a sliding surface 21 c of slide section 21 a , 21 b , 21 c on one side and a corresponding sliding surface of the mirror image on the other side is also tolerance-encumbered, the distance between 11 a and 21 c is tolerance-encumbered as well, so that it is necessary to compensate for deviations from the setpoint distance, thus of the play. Used for that purpose is elastic (plastic, self-lubricating) sliding block 3 which, at the same time, takes over the guidance of slide section 21 a , 21 b , 21 c in guide rail 11 .

Bearing block 1 and guide part 2 are molded parts made of sheet steel without subsequent processing. The construction is such that plastic sliding block 3 is surrounded by, in particular, force-transmitting sheet-metal part 2 , namely, by its slide section 21 a , 21 b , 21 c in such a way that it is possible to dispense with other securing and retention in the longitudinal direction of guide rail 11 , and operation under emergency conditions is ensured, even in the event of a failure (destruction of plastic bearing block 3 ).

In addition, shanks 21 a , 21 b of slide section 21 a , 21 b , 21 c surround sliding block 3 in such a way that slide section 21 a , 21 b , 21 c is able to swivel with respect to sliding block 3 , and thus with respect to guide rail 11 . This permits an angular adjustment of guide part 2 , and therefore of the steering column with respect to bearing block 1 .

The adjustable steering column support according to the present invention may provided the following advantages:

1. Use of inexpensive sheet steel molded parts 1 , 2

Lower production costs compared to die casting

No processing necessary

2. Omission of the hot riveting for a fixation bolt

No bolt necessary any longer for mounting sliding block 3

Bolt completely omitted

3. Omission of the adjustment

No adjustment necessary because of flexibly designed sliding block 3

4. Freedom from play due to the spring action of sliding block 3

Advantageous for the feel at the steering wheel

No noise

Offset or compensation against wear and tear.