US Patent No. 9,902,419

TELESCOPIC STEERING COLUMN ASSEMBLY


Patent No. 9,902,419
Issue Date February 27, 2018
Title Telescopic Steering Column Assembly
Inventorship Michael Appleyard, Gloucestershire (GB)
Assignee TRW LIMITED, Solihull, West Midlands (GB)

Claim of US Patent No. 9,902,419

1. A telescopic steering column assembly comprising an upper shroud portion, a lower shroud portion, the two shroud portions
being able to move relatively along a common linear path during telescopic adjustment, a telescopic steering shaft that passes
through the upper and lower shroud portions and is supported by the shroud portions through at least one support bearing assembly
that acts between an upper portion of the telescopic steering shaft and the lower shroud portion that move relative to one
another axially during telescopic adjustment of the steering column assembly for reach, the support bearing assembly in use
removing free play between the telescopic steering shaft and the shroud portions that would otherwise occur in at least one
direction orthogonal to the telescopic adjustment, in which the at least one support bearing assembly comprises:
a first bearing race which is separate from the shroud portions and the steering shaft,
a resilient spacer that applies a biasing force that is directed in a radial direction from an axis of the steering shaft
and that is located between the first bearing race and an adjacent face of one of the lower shroud portion and the upper shaft
portion;

a set of bearings, and
a cage that locates the bearings relative to the first bearing race,
wherein the bearings bear onto a second bearing race that is defined by a surface of the other one of the lower shroud portion
and the upper shaft portion, the second bearing race permitting the bearings to slide or roll in the direction of telescopic
adjustment of the steering column assembly when adjusted for reach.