Patent ID: 6463784
Filing Date: 2002-10-15
Classification: G01N

Abstract:
A measuring apparatus of sliding friction coefficient for vehicle running road surface comprising a support frame, a measuring wheel rotatably supported in said support frame, a brake unit on said support frame for braking said measuring wheel, a first load cell on said support frame for measuring tension between said support frame and said measuring wheel upon braking of said measuring wheel, a second load cell on said support frame for measuring a carrying weight loaded on said measuring wheel, and a box-like casing for said support frame having means for raising and lowering the support frame relative to the box-like casing, and wherein said support frame comprises a horizontal plate and a vertical plate connected to the horizontal plate, said horizontal plate having a bottom side with depending flanges and a support rod supported by the depending flanges, two spaced vertical arms having upper end portions mounted pivotally to said support rod, said vertical arms having opposite lower end portions for rotatably supporting the measuring wheel, said measuring wheel including a rotatable shaft that is rotatably supported in the lower end portions of the vertical arms, and said support frame further includes horizontal arms that each have one horizontal end portion connected to a respective said lower end portion of said vertical arms, and an opposite horizontal end portion connected to the vertical plate via the first load cell for measuring tension between the support frame and the measuring wheel.