Road surface stimulation test jig vehicular axle - applies and measures longitudinal, vertical and transverse stresses and contra-rotation torque, exerted through substitute wheel

摘要

The road wheel is removed and replaced by a substitute wheel (1) comprises a disc (2) linked to a rotatable peripheral ring (3) via a bearing (14). Thrust rods (8) are brought to bear on the peripheral ring by processor controlled longitudinal, vertical and transverse forces (4-6) applied by motors through universal joints with force transducers. A steering shaft (11) universally jointed at both ends applies braking torque (7) to the hub (16) from a pivot motor (10) equipped with a measuring hub (12). The distal joint is secured by the wheel bolts (17) to the substitute. The combined mass of the substitute wheel and thrust rods corresponds to the road wheel mass. ADVANTAGE - Systematic errors introduced by coupling of braking and longitudinal forces are reduced.