| 摘要 |
An improved tyre changing machine comprises a lateral bead-breaking arm (2) provided with a bead-breaking tool (5) and an assembly (1) for the actuation of said arm (2). The actuation assembly comprises a box-like base frame (4) on at least one side (23) of which is articulated the arm (2), a horizontal rotary platform (6) mounted on the box-like base frame (4) for supporting and clamping a wheel (R), a column (7) mounted on the box-like base frame (4) for supporting an upwardly projecting work tool. The assembly (1) comprises at least one gear reducer motor (8) mounted inside the box-like base frame (4) and a rotary motor-driven shaft (9) projecting from the gear reducer motor (8) and carrying a crank means (10), a connecting rod means (11) pivotally connected between the crank means (10) and the lateral bead-breaking arm (2), in such a manner that the arm (2) can move from a released position to a compressing position of a tyre and vice versa. <IMAGE> |
