| 摘要 |
<p>A tire mounting method and tool for use in mounting a large, heavy off-highway pneumatic tire onto a dual-flanged single piece drop center wheel rim of the type having at each rim flange a re-entrant lip protruding radially inwardly toward the axis of the rim. The tool has a main frame adapted to be placed upon one side of the wheel rim when the rim is resting horizontally on its axially opposite other side on the ground in a free, unfixtured condition. The frame is longer than the inside diameter of the rim flange lip and slidably rests thereupon, and also slidably grips the rim lip. A pair of arms each are pivoted at their inboard ends to the main frame at a common pivot point for pivotal counter-rotational movement on opposite sides of the main frame about a pivot axis parallel to the rim axis. A pair of tire-bead-engaging shoes are carried one on each of the outboard ends of the arms. A pair of hydraulic rams are interconnected one between each of the arms and the main frame for counter-rotating the arms so as to propel said shoes in arcuate paths adjacent and outwardly of the rim flange. The rams are operably interconnected for fluid pressure actuation in a parallel fluid circuit from a common hydraulic pressure fluid source such that in operation of the tool the arms are pivotal about an axis generally co-incident with the axis of the wheel rim, and the entire tool is likewise bodily rotatable about this axis to re-balance unequal tire-bead reaction forces exerted on the shoes.</p> |
