Demount tool assembly and methods for automated tire changer machine

摘要

A tire changer machine and tire demounting methodology includes a demount tool assembly having a demount tool selectively positionable relative to a support and configured to extract a bead of the tire from the wheel rim. A guide element is mounted to the support, and the guide element is operable to provide a limited degree of freedom of the distal end from a predetermined path of motion in a tire demount procedure, thereby allowing the distal end to reliably grip the tire bead while the support arm is maintained in a stationary position relative to the wheel rim.

主权项

1. A tire changer machine for changing a tire on a wheel rim, the machine comprising:
a base; a drive assembly coupled to the base and configured to rotate a wheel rim and associated tire about a rotational axis; a tool support; and a tool assembly coupled to the tool support, the tool assembly comprising:
a demount tool coupled to the tool support and selectively positionable with respect to the tool support, the demount tool having a proximal end and a distal end, the distal end configured to extract a bead of the tire from the wheel rim;a pivot arm connecting the tool support and the demount tool, the pivot arm configured to move the proximal end of the demount tool along a predetermined path of motion; anda linkage connecting a resilient member between the tool support and a pivot point on the demount tool located between the proximal end and distal end to provide a limited degree of freedom of the distal end of the demount tool from the predetermined path of motion in a tire demount procedure.