US 4,432,144 AGranted

Arrangement for measuring and checking motorcycle frames

AssigneeAB Samefa

InventorHarry Carlsson

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Abstract

According to the invention an arrangement (10) is proposed for measuring and checking motorcycle frames, comprising a measuring beam (14) which is attached to one side of the motorcycle frame which is to be checked, parallel thereto and preferably at the so-called pivot-point of the frame. One or more uprights (16, 18) at right-angles to the beam (14) can be moved along the beam and themselves bear movable mountings (24, 28) with adjustable measuring points (26, 30). The latter can be made to seek out desired points on the frame, and with the aid of appropriate scales or calibrations the co-ordinates of the points relative to the pivot point can be determined. Two such measuring arrangements (10) placed one on each side of the motorcycle frame can be connected together by means of transverse bridges or the like to form a stable measuring stand. The arrangement is such that frame measurements can be carried out whether the frame has been dismantled or forms part of a complete motorcycle, and furthermore measurements can be carried out even if the frame or the motorcycle is set up in a straightening device, so-called traction jig.

Claims12

Dependent claims

Apparatus including an arrangement for measuring and checking motorcycle frames of the kind incorporating structure defining a pair of reference points on opposite sides of the lower part of the motorcycle frame defining a reference axis (y--y) extending through the width of the motorcycle frame, said arrangement being suitable for measuring both a motorcycle frame completely or partially exposed by removal of other components of the motorcycle and a frame of a complete motorcycle, said measuring arrangement comprising:

a measuring beam connectable to the motorcycle frame at right-angles to said reference axis (y--y) with the measuring beam extending in the longitudinal direction of the motorcycle frame;
fixing means extending along said reference axis (y--y) between said reference point on said motorcycle frame and a fixed point on said beam;
at least one upright extending from the measuring beam at right-angles to a plane parallel to both the measuring beam and the reference axis (y--y), said upright being mounted for displacement (x) so that it can be moved along the beam;
at least one mounting member mounted for displacement (z) along the upright;
a measuring point displaceable in the mounting member at right-angles to both the measuring beam and the upright, with calibrations on at least the measuring beam and the upright for determining the amount of the displacement (x) of the upright along the beam in relation to the reference axis (y--y) and also the displacement (z) of the measuring point along the upright in relation to the measuring beam, and thus also the perpendicular distance of the measuring point from the reference axis (y--y).

2 more elements

Dependencies are inferred from the claim text.