Pneumatic tyre fitting device for vehicle wheel - uses current amplitude regulation of drive motor to control torque during fitting process

摘要

The tyre fitting device uses an electric motor (1) for relative rotation of the tyre and the vehicle wheel and a fitting tool w.r.t. the wheel axis so that the tyre edge is fitted over the wheel rim. The rotary torque is controlled during the tyre fitting operation by controlling the current amplitude supplied to the electric motor (1), until a preset max. value is attained. Pref. the current amplitude is increased continuously, or in discrete stages, using a phase chopping control (2), the current amplitude regulation being matched to different types of tyre. ADVANTAGE - Safe fitting of wide range of different tyres.