Patent ID: 6109327
Filing Date: 2000-08-29
Classification: B60B,B60C

Abstract:
A tire changing machine comprising:a support bed;an at least partly frustoconical platform which is rotatable arranged on the bed to act as a support for a vehicle wheel rim;a main threaded shaft which is mounted for rotation coaxially with the platform and vertically extend therefrom;driving means for the rotation of the main shaft;holding means to be engaged on the main shaft for holding the wheel rim on the platform such that the wheel rim rotates together with said platform when said platform rotates on the bed;at least one lateral supporting column extending upwards from said bed and pivoted thereto about a substantially horizontal axis to perform controlled angular pitching movements towards, and away from, said platform, the column being extendable and retractable to be positioned between a lowered active position at a desired level with respect to said platform, and a raised resting position;driving means for controlling the angular movements of said lateral column;upper bead breaking means supported by said at least one lateral column so as to be adjustable in position with respect to said platform and to act from above on a tire to be mounted on, or removed from, a wheel rim located on the platform;lower bead breaking means located within said bed and arranged to be lifted against a tire placed on the wheel rim located on the platform; anddriving means designed to control the movements of said lower bead breaking means.