METHOD FOR DETECTING THE ECCENTRICITY OF A TIRE FOR VEHICLE WHEELS WITHIN PROCESSES OF MAINTENANCE OF SAID WHEELS AND APPARATUS FOR THE MAINTENANCE OF WHEELS OF VEHICLES

摘要

An apparatus for the maintenance of wheels of vehicles, like a balancer or a device for mounting/dismounting tires, comprises a support adapted to support a rim of a wheel of a vehicle. A device for detecting the eccentricity of a tire of the wheel is mounted on the support. Such device comprises an optical system configured to capture a light beam reflected by a tread of the tire and focus it on a point of an optical sensor. The optical sensor emits a signal indicative of an average value of a radial distance of the linear portion from the main axis. A control unit processes a plurality of average values corresponding to different linear portions of the tread and obtained during the rotation of the tire, and detects the eccentricity of said tire.

主权项

1. A method for detecting the eccentricity of a tire for vehicle wheels, preferably within processes of maintenance of said wheels, comprising:
i. making a wheel rotate about a main axis of said wheel, said wheel comprising a rim and a tire; ii. illuminating a linear portion of a tread of the tire with a planar beam of light, preferably laser, wherein said linear portion has an axial width smaller than an axial width of the tread and greater than an axial width of grooves of said tread; iii. capturing a light beam reflected by the tread and focusing it on a point of an optical sensor, in which a signal emitted by the optical sensor is indicative of an average value of a radial distance of the linear portion from the main axis, said average value being calculated along the extension of said linear portion; iv. processing a plurality of average values corresponding to different linear portions of the tread and obtained during the rotation of the tire and detecting the eccentricity of said tire.