Method and device for measuring automobile wheel alignment

Abstract

The invenion provided a method for measuring a camber angle of an automobile and an apparatus therefor, which enables a quick and precise measurement of the camber angle without applying the same load as the finished state automobile to a wheel mounting part, and which can improve productivity. The inclination angle in the width direction of the automobile with respect to the horizon of a body 2 in a suspended state by a hanger 1 is detected as the posture angle. The body 2 is suspended by the hanger 1, and the wheel mounting part 5 is raised to the position at a prescribed height. The position and the camber angle of the rising wheel mounting part 5 are measured. The measured camber angle is corrected on the basis of the posture angle. The camber angle at the position of the wheel mounting part 5 in the state in which the automobile is finished is calculated from the corrected camber angle.

Description

technical field [0001] The invention relates to a method and a device for measuring the wheel alignment of a motor vehicle transported in a suspended state on a motor vehicle assembly line. Background technique [0002] Conventionally, as a technique for measuring the wheel alignment of a motor vehicle, it is well known and described in, for example, Japanese Patent No. 2938984 . According to this technique, the toe angle and the camber angle are measured by means of the wheel mounting portion without mounting the wheel on an assembly line for assembling the vehicle body, thereby improving productivity. [0003] In this measuring method, in the assembly line of the motor vehicle body, after the steering device and the suspension device are assembled on the vehicle body transported by the hanger, first, the vehicle body is separated from the hanger. At this time, the positioning of the vehicle body is performed by fitting the stopper pins of the positioning mechanism provide...

AI Technical Summary

Problems solved by technology

[0006] However, there is play between the rollers provided on the upper part of the hanger for transporting the vehicle body and the transport rails that guide the rollers, and the center of gravity of the vehicle body will change due to the influence of the parts installed on the vehicle body. Then the posture of the vehicle body on each hanger deviates from the specified direction to the left and right, or the posture of the vehicle body cannot be kept horizontal on each hanger, so that the vehicle body tilts to the vehicle width direction

In this way, the toe angle and camber angle measured from the vehicle body supported by the hanger may become incorrect due to the influence of the posture of the vehicle body at the time of measurement.

Images