Load lifting unit, for teaching students electrical/mechanical principles for load control, uses winch controlled from control unit and has two modes of starting sudden and speed varied

摘要

The unit has a support (1) on top of which is a winch (5) on a support (2) hinged on an axis (3) and whose other side rests on dampers (4). The winch includes an electric motor and reducing gear which can be directly started or speed varied. The unit has load and displacement sensors fitted between the hinge and dampers, an of run system with screw and conventional cursor associated with overrun safety contacts. The unit has means for zeroing a coded pulse generator which proves data for an automate, computer or printer. An electrical control panel (27) fitted to the support (1) includes an electrical control and power section, a starting section, a speed variation section and braking resistance, signal lamps control desk with tachometer and raise and lower controls and electrical connection sockets. The unit presents to the students two modes of starting, direct and electronic speed variation and shows, using the sensors and dampers, the distance necessary to stop a moving load or sudden load and the flexibility of use of one or other of the lifting modes and the required operating energy; the management of the lifting by a robot and industrial computer (displacement distance, speed of displacement, acceleration/deceleration; electrical and mechanical measurements inherent for use of on or other operating mode.