초록 ▼

Apparatus and method are disclosed by which toe is measured relative to a vehicle centerline or a nonsteerable wheel rolling direction for all four wheels on a vehicle having a pair of front steerable wheels and a pair of rear nonsteerable wheels. An alignment head is placed on one of the front whee

Apparatus and method are disclosed by which toe is measured relative to a vehicle centerline or a nonsteerable wheel rolling direction for all four wheels on a vehicle having a pair of front steerable wheels and a pair of rear nonsteerable wheels. An alignment head is placed on one of the front wheels and another alignment head is placed on one of the rear wheels, both wheels being on the same side of the vehicle. The alignment heads project a beam pattern across the vehicle at the front and the rear. Reflectors are mounted on the other wheels at the front and the rear to intercept and reflect the beams back toward detectors included in the alignment heads. A beam pattern is also projected rearwardly along the length of the vehicle chassis from the alignment head mounted on the front wheel. A rear wheel mounted reflector intercepts the rearwardly projected beam pattern and reflects it back toward a detector in the front wheel mounted alignment head. Structure is provided on each of the rear wheels which provides an optical path which may be directed toward points at the front wheels which are equidistant from a center point between the front wheel pair. Measurements of total toe for each wheel pair and of individual toe for each wheel are obtained through use of the disclosed structure and process.

대표청구항 ▼

A method of measuring individual toe for wheel pairs mounted on front and rear axles of a vehicle chassis, comprising the steps of mounting a toe measurement device on each wheel in each pair of wheels, communicating directly the toe measurement devices on wheels on each axle, whereby the total toe

A method of measuring individual toe for wheel pairs mounted on front and rear axles of a vehicle chassis, comprising the steps of mounting a toe measurement device on each wheel in each pair of wheels, communicating directly the toe measurement devices on wheels on each axle, whereby the total toe of the wheels on each axle is measured directly and simultaneously, determining the angular relationship of the plane of one wheel on one axle relative to the plane of one wheel on the other axle on the same side of the chassis, and referencing the toe of each wheel to the bisector of the total toe angle of the wheels on the other axle.