Tyre changing machine

A tyre changing machine, configured to remove a tyre from a respective rim of a vehicle wheel, comprising an operating arm which includes:

• a supporting structure;
• a head movable along a longitudinal axis relative to the supporting structure;
• a removal tool pivoted to the head to rotate relative thereto about an axis of oscillation transverse to the longitudinal axis;
• a driving member movable along an operating axis parallel to the longitudinal axis relative to the supporting structure and to the head, and articulated to the removal tool at an operating point which is spaced from the axis of oscillation;
• an actuator comprising a stationary member, connected to the supporting structure, and a movable member, wherein the movable member drives the removal tool in rotation and in translation;
• and
• a coupling member coupled to the supporting structure, to the head and to the driving member;
• wherein the movable member of the actuator is connected to the driving member to directly drive the driving member along the operating axis, comprising either one or both of:
• a front spring having a first end which is connected to the head and a second end which is connected to the driving member;
• and
• a rear spring having a first end which is connected to the coupling member and a second end which is connected to the supporting structure.

An operating arm for a tyre changing machine configured to remove a tyre from a respective rim of a vehicle wheel, the operating arm including:

• a supporting structure;
• a head movable along a longitudinal axis relative to the supporting structure;
• a removal tool pivoted to the head to rotate relative thereto about an axis of oscillation transverse to the longitudinal axis;
• a driving member movable along an operating axis parallel to the longitudinal axis relative to the supporting structure and to the head, and articulated to the removal tool at an operating point which is spaced from the axis of oscillation;
• an actuator comprising a stationary member, connected to the supporting structure, and a movable member, wherein the movable member drives the removal tool in rotation and in translation;
• and
• a coupling member coupled to the supporting structure, to the head and to the driving member;
• wherein the movable member of the actuator is connected to the driving member to directly drive the driving member along the operating axis;
• and
• wherein the driving member is articulated to the removal tool through a crank, which has a first end, pivotally connected to the removal tool at the operating point, and a second end, pivotally connected to the driving member.