Tyre dismounting apparatus adapted to be installed on a motor vehicle and tyre dismounting method

A method for dismounting a tyre from a respective wheel rim, comprising the following steps:

• preparing a base, fixed to a motor vehicle, and a frame which is tiltable relative to the base about a tilting axis between a rest position and a working position, wherein the frame comprises an arm extending along a longitudinal axis, and wherein the arm includes a longitudinal guide elongated along the longitudinal axis;
• tilting the frame about the tilting axis from the rest position, where the frame is positioned inside the motor vehicle, to the working position, where at least part of the frame is positioned outside the motor vehicle, wherein in the working position, the longitudinal axis of the arm has at least one component parallel to a weight force;
• receiving and locking a wheel in place by means of a wheel-holder unit connected to the frame, wherein the wheel-holder unit comprises a self-centring chuck, rotatable about an axis of rotation, and configured to engage the wheel and lock the wheel in place;
• moving the wheel-holder unit by translation along the longitudinal guide, in order to lift the wheel off a ground;
• and
• moving a working unit, including a rod and a tool connected to the rod, relative to the wheel-holder unit along a transverse axis parallel to the tilting axis by means of a transverse actuator, in order to allow the tool of the working unit to interact with the tyre on the wheel;
• wherein the frame comprises a supporting foot directly connected to the arm and configured to support a weight of the arm, wherein when the frame is at the working position, the supporting foot rests on the ground and supports the arm.

A tyre dismounting apparatus adapted to be installed on a motor vehicle, comprising:

• a base configured to be fixed to the motor vehicle;
• a frame, hinged to the base and tiltable about a tilting axis between a rest position and a working position, wherein the frame comprises an arm extending along a longitudinal axis, wherein, in the working position, the longitudinal axis has at least one component parallel to a weight force, and wherein the arm includes a longitudinal guide elongated along the longitudinal axis;
• a tilting actuator connected to the base and to the frame to move the frame relative to the base;
• a wheel-holder unit configured to receive a wheel and lock the wheel in place and rotating about an axis of rotation to drive the wheel in rotation about the axis of rotation, wherein the wheel-holder unit comprises a self-centering chuck, rotatable about the axis of rotation and configured to engage the wheel and lock the wheel in place, wherein the wheel-holder unit is coupled to the longitudinal guide;
• a longitudinal actuator connected to the frame and configured to move the wheel-holder unit by translation along the longitudinal guide;
• a working unit connected to the frame and including a rod and a tool connected to the rod,
• wherein the tyre dismounting apparatus further comprises a transverse actuator connected to the working unit and configured to move the working unit translationally relative to the wheel-holder unit along a transverse axis parallel to the tilting axis of the frame;
• and
• wherein the frame comprises a supporting foot connected to the arm, wherein, when the frame is in the working position, the supporting foot rests on a ground and supports the arm,
• wherein the frame comprises a crossbar extending along the transverse axis, parallel to the tilting axis and perpendicular to the longitudinal axis,
• wherein the crossbar includes a transverse guide and a transverse slide slidably coupled to the transverse guide and connected to the transverse actuator, wherein the working unit is mounted on the transverse slide, and
• wherein the crossbar further comprises the transverse actuator, the transverse actuator including a manual guide mounted on the transverse slide and wherein the working unit is movably connected to the manual guide to be driven transversely along the manual guide and to be rotated relative to the manual guide.