Energy absorbing steering column for motor vehicle

Machine element or mechanism – Control lever and linkage systems – Hand operated

Patent

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Details

74492, 188371, 280777, B62D 119

Patent

active

057067040

ABSTRACT:
An energy absorber for a motor vehicle steering column including a yoke pivotable about a lateral centerline of a motor vehicle body and an energy absorbing means between the yoke and the mast jacket responsive to linear translation of the mast jacket relative to the yoke. The mast jacket extends through a bore in the yoke and a plastic bushing in the bore prevents the mast jacket from tilting relative to the yoke before and during linear translation of the mast jacket. The energy absorbing means includes a flat metal strap attached at one end to the mast jacket and bent over a convex anvil on the yoke. The metal strap is pulled over the anvil parallel to a longitudinal centerline of the mast jacket and plastically deformed to convert into work a fraction of the kinetic energy of an impact on the steering column. Because the mast jacket pivots as a unit with the yoke, the metal strap is always parallel to the longitudinal centerline of the mast jacket and the vector force reaction on the mast jacket attributable to the energy absorber intersects the lateral centerline.

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