Yoke apparatus for rack and pinion

Machine element or mechanism – Gearing – Directly cooperating gears

Patent

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Details

74 8911, 74 8919, 384 37, F16H 104

Patent

active

06142031&

ABSTRACT:
A yoke assembly for a rack and pinion steering system includes a bearing disc member having a pair of bearing surfaces for slidingly supporting and urging the rack toward the pinion. The bearing disc member is kinematically supported by elastomeric members along an adjustment axis. In the pitch direction elastomerically derived forces are applied toward an apex located well within the rack and away from the bearing surfaces. This results in the bearing disc member rotating slightly in a contra-pitch direction and forming a lubrication wedge whenever the rack moves along its axis of translation. Additionally along the adjustment axis, the bearing disc is supplementally supported in a stiffer manner in opposition to heavy shock loads. In the yaw direction, elastomerically derived forces are laterally directed to compliantly bias the bearing disc in a lateral direction orthogonal to a plane defined by the adjustment and translation axes toward a preferred central location.

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patent: 5316043 (1994-05-01), Phillips

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