| 摘要 |
The adjuster comprises a rotatable support wheel or roller (24) fitted adjacent to the main wheel (2) with its centre on an extension of a radius through the centre of the drive axle (20). The radius forming an angle less than 90 deg. to the normal direction in which the position on the main wheel periphery is orientated. The second bearing (22) and the rotatably fitted support wheel (24) rotation axle are located in a rotatably fitted arm (25) the axis of rotation (251) of which, compared with the support wheel (24), is arranged on the same side around but further from the main wheel (2). The arm (25) is provided with an adjuster (252) for basic regulation of the periphery of the main wheel (2) to a predetermined level. |
