A tyre changing machine includes a wheel support assembly for locking and setting in rotation a rim of a wheel from which to demount or on which to mount a tyre, and a bead breaking tool disposed at an end of a bead breaking arm and able to carry out the bead breaking operation. The bead breaking arm is movable between a disengaged position and a working position. A motor device has an output drive shaft for moving the bead breaking arm between the disengaged and working positions. Means for transmitting the drive from the motor device to the bead breaking arm include threaded means having an external screw-thread and hollow counter-threaded means operatively coupled with the threaded means. Connecting means operatively associate the means for transmitting the drive to the bead breaking arm.

Described herein is a method for dismounting a tire from a wheel assembly. The method may comprise inserting at least a first finger and a second finger between a top bead of a tire and a top bead seat of a wheel, pulling a portion of at least the top bead past a plane defined by the outer edge of the top bead seat, and moving the first finger in a first rotational direction away from the second finger. Also described herein is a finger for dismounting a tire from a wheel. The finger may comprise at least one roller having two opposing ends, each end connected to a corresponding end of a roller nest of the finger. Also described herein is an apparatus for removing a tire from a wheel. The apparatus may comprise a wheel alignment assembly, a tire dismount assembly, a bead lifter, and a rotation assembly.

Described herein is a method for dismounting a tire from a wheel assembly. The method may comprise inserting at least a first finger and a second finger between a top bead of a tire and a top bead seat of a wheel, pulling a portion of at least the top bead past a plane defined by the outer edge of the top bead seat, and moving the first finger in a first rotational direction away from the second finger. Also described herein is a finger for dismounting a tire from a wheel. The finger may comprise at least one roller having two opposing ends, each end connected to a corresponding end of a roller nest of the finger. Also described herein is an apparatus for removing a tire from a wheel. The apparatus may comprise a wheel alignment assembly, a tire dismount assembly, a bead lifter, and a rotation assembly.

A tyre changing machine includes a frame; a wheel support assembly mounted on the frame for locking and setting in rotation a rim of a wheel; at least a bead breaking arm; and a bead breaking tool adapted to carry out the bead breaking operation of the tyre of the wheel. The bead breaking arm is movable between a disengaged position, in which the bead breaking tool is substantially distanced with respect to the tyre, and a working position, in which the bead breaking tool can engage on the tyre. A motor device has an output drive shaft for moving the bead breaking arm. The tyre changing machine further includes means for transmitting drive from the motor device to the bead breaking arm or to the wheel support assembly and adapted to activate the bead breaking arm or the wheel support assembly.

A tyre changing machine includes a frame; a wheel support assembly mounted on the frame for locking and setting in rotation a rim of a wheel; at least a bead breaking arm; and a bead breaking tool adapted to carry out the bead breaking operation of the tyre of the wheel. The bead breaking arm is movable between a disengaged position, in which the bead breaking tool is substantially distanced with respect to the tyre, and a working position, in which the bead breaking tool can engage on the tyre. A motor device has an output drive shaft for moving the bead breaking arm. The tyre changing machine further includes means for transmitting drive from the motor device to the bead breaking arm or to the wheel support assembly and adapted to activate the bead breaking arm or the wheel support assembly.

The present invention regards a group for supporting and tightening a rim of or for a tired wheel, and such group includes a base, a wheel-holder table, an upright or column projecting upward from the base and supporting at the top the wheel-holder table, a shaft or pin mounted in or alongside the upright or column, a sleeve element or ring nut element constrainable or mountable on the shaft or pin and means for the relative movement of the shaft or pin and of the table.

A tyre changing apparatus (1) comprises: a frame (10); a supporting element (11) for supporting a wheel (2) rotatably about an axis of rotation (A); an arm (12) movably connected to the frame (10) to be moved by an actuator (5B, 5B) along a direction of movement (B) parallel to the axis of rotation (A); a bead breaker tool (13) connected to the arm (12) to move between an activated position, where it is in contact with the tyre (3), and a deactivated position, where it is spaced from the tyre (3); a control unit (14). The bead breaker tool (13) includes a mounting element (13A) and a bead breaker disc (13B) which rotates freely relative to the mounting element (13A) and comprises a sensor (131), configured to generate a contact signal (132) representing a rotation of the bead breaker disc (138) relative to the mounting element (13A); the control unit (14) is connected to the sensor (131) to receive the contact signal (132).

A device for unseating tire beads of a tire from a rim comprises facing mobile upper and fixed lower jaws adapted to receive the tire horizontally therebetween. The upper jaw is mounted to a pivotable parallelogram linkage which is displaced by a pneumatic cylinder, whereby the actuation of the cylinder displaces the linkage which drives the upper jaw downwardly onto the upper sidewall of the tire, adjacent the rim, with the lower sidewall of the tire being engaged by the lower jaw. The upper and lower jaws are substantially vertical and plane plates. An adjustable tire abutment is provided for positioning the tire within the device such that the upper and lower jaws face respective sidewalls of the tire adjacent the rim. Another device is adapted to vertically receive the tire between the jaws thereof, so as to be unseated from the rim in a vertical position.

A device for unseating tire beads of a tire from a rim comprises facing mobile upper and fixed lower jaws adapted to receive the tire horizontally therebetween. The upper jaw is mounted to a pivotable parallelogram linkage which is displaced by a pneumatic cylinder, whereby the actuation of the cylinder displaces the linkage which drives the upper jaw downwardly onto the upper sidewall of the tire, adjacent the rim, with the lower sidewall of the tire being engaged by the lower jaw. The upper and lower jaws are substantially vertical and plane plates. An adjustable tire abutment is provided for positioning the tire within the device such that the upper and lower jaws face respective sidewalls of the tire adjacent the rim. Another device is adapted to vertically receive the tire between the jaws thereof, so as to be unseated from the rim in a vertical position.

A tyre changing machine (100) comprises: a wheel-holder unit (200); a frame (400); a bead breaker unit (300) including a bead breaking arm (301) articulated to the frame (400) to rotate about a vertical axis (Y), a bead breaker tool (302) and a bead breaker actuator (303) to move the bead breaker tool (302) towards and away from a wheel (R); a lifting device (500), including a lifting arm (501) and a supporting platform (502), defining a horizontal surface on which to rest the wheel (R) and connected to the lifting arm (501) to be movable between a lowered position and a raised position. The lifting device (500) also comprises a lifting actuator to move the supporting platform (502) between the raised position and the lowered position, and a box-shaped body (600) that is operatively coupled to the flank (400b) of the frame (400); the lifting actuator is at least partly positioned in the box-shaped body.