INDEPENDENT HYDRAULIC SERVO DRIVE STEERING FOR BETWEEN-THE-DUALS DIRECT DRIVE EQUALIZING BEAM SUSPENSION
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United States of America Patent
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app pub date -
Apr 29, 2011
filing date -
Jul 23, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A tandem axle (TA) has identical right and left halves, each having a walking beam (9) for suspending the respective half from a chassis frame. A front axle (FA) is at a front of the walking beam and a rear axle (RA) at the rear. Each axle has a carrier carrying a direct wheel drive mechanism having a direct drive motor (6) that drives inboard and outboard wheel hubs (3). A front steering motor (14) mounted on the walking beam has a shaft (14S) coupled to the front axle carrier for steering the front axle, and a rear steering motor (13) steers the rear axle. Each carrier carries its direct wheel drive mechanism in a manner that allows the inboard wheel hub to swing upward along an arc while the outboard wheel hub swings downward along an arc, and the outboard wheel hub to swing upward along an arc while the inboard wheel hub swings downward along an arc.
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