Moveable cover plate driver unit of the mechanical turn-up building drum

A movable cover plate drive unit for the mechanical turn-up building drum, which including guiding plate, end cover, moveable cover plate, fixed cover plate, cylinder, rotary ring and several turn-up bars, wherein between the guiding plate and end cover in axial is mounted with the cylinder, which is composed of a barrel, a piston and a slot ring, and the said fixed cover plate is to fix on the outer circumference of the slot ring, and the said fixed cover plate is to fix on the outer circumference of the slot ring, and at the end of the said slot ring is mounted with rotary ring, which slides in axial along with the said barrel by driven bearing via the said slot ring, characterized in that,

• the said moveable cover plate is to connect with the said slot ring of cylinder through pin shaft I, as well as able to rotate around the pin shaft I, and the said moveable cover plate is to connect with the rotary ring through the pin shaft II, which is located inside the outboard groove of rotary ring,
• and on the said rotary ring is fixed with the needle cylinder which is to connect with the said slot ring at the end of piston rod through the pin shaft I, wherein the said piston rod of the needle cylinder moves in shuttle, which drives the said rotary ring so as to turn relative with the said slot ring, as well as open or close the said moveable cover plate via the pin shaft.