Abstract:
A device for evaluating tire rolling resistance, the device includes: load rolls having surfaces that simulate a road surface on which a tire is to travel; a moving mechanism; a load sensor; a position sensor; a phase difference calculation unit; and a rolling resistance evaluation unit. The load rolls are two or more load rolls disposed side by side and are smaller in diameter than the tire.
Abstract:
A tire air filling mechanism in a tire testing device includes an air supply source which supplies air into a tire to be mounted between a pair of rims attached to ends of tire shafts. An injection direction of the air supplied into the tire from the air supply source is set at a direction inclined with respect to a radial direction of the tire, so that the air supplied from the air supply source can be turned inside the tire.
Abstract:
A device for measuring a thrust load acting on a rotor of a hermetically sealed kneader includes displacement sensors (19) and a load-calculating member. The displacement sensors (19) are configured to measure relative displacement along the axial direction of an outer ring-fixing member (17), which is for fixing the outer ring (16) of one end of a bearing (6), or a casing (18) with respect to an inner ring-fixing member (20), which is for fixing the inner ring (13) of the one end of the bearing (6), or the rotor (5). The load-calculating unit calculates the thrust load acting on the rotor (5) by multiplying the relative displacement measured by the displacement sensors (19) by a conversion coefficient.
Abstract:
The calibration method for a multi-component force detector is a calibration method for a multi-component force detector provided in a rolling resistance testing machine comprising a spindle to which a tire is mounted, and a traveling drum having a simulated traveling road surface against which the tire is pressed, wherein when processing for calculating force acting on the tire from the measurement value of the multi-component force detector using a crosstalk correction factor for correcting the influence of crosstalk occurring in the multi-component force detector is performed, a test is conducted using at least one or more reference tire the rolling resistance value of which is already known, and the crosstalk correction factor is calibrated using “rolling test data” composed of force measured by the multi-component force detector during the test using the reference tire, and the rolling resistance value of the reference tire used for the measurement.