| 摘要 |
A tire assembling-disassembling machine includes a supporting, locking and rotating device for a wheel-rim for a vehicle tired-wheel about the axis of rotation of the wheel, at least one bead releasing assembly provided with a fixed support structure and a pair of supports extendible-retractable in a substantially radial direction with respect to the axis of rotation starting from the fixed support structure and slidingly mounted along guide structure, at least one bead releasing roller carried at one end of a respective extendible-retractable support, driving structure for moving the arms towards and away from each other, a tool for fitting a tire onto the wheel-rim, a controller for radially extending-retracting each support and controllable locking-releasing structure for each support in an extended position thereof, and additional controllable driving structure to effect an additional extension of its respective support when locked in its extended working position by the locking-releasing structure.
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