Press drive arrangement

A press drive which includes a central cam shaft means, a slide guided in a linear guide of a press frame, a connecting rod means for connecting the central cam shaft means with said slide, a pair of side bar means symmetrically articulated to the slide for indirectly moving a punch of the press, and balancing weight means driven in an opposed direction to reciprocating masses of the press, characterized in that a pair of first toggle joint linkage means are respectively disposed symmetrically to the cam shaft means, each of said pair of first toggle joint linkage means extends substantially horizontally and is respectively articulated to one of the side bar means supported by a bearing means disposed at the frame of the press, a pair of second toggle linkage means are respectively disposed symmetrically to the cam shaft means, each of said pair of second toggle joint linkage means extends substantially vertically and is articulated to the respective second toggle joint linkage means and the balancing weight means, means are provided for enabling each of the second toggle joint linkage means to be guided by the frame of the press, a pair of third toggle joint linkage means are respectively disposed symmetrically with respect to the cam shaft means, each of said pair of third toggle joint linkage means extends substantially vertically and is articulated to the punch and is braced in a direction of motion of the punch on the frame of the press, and in that a transmission bar means is provided for articulatingly connecting each of the third toggle joint linkage means with the respective first and second toggle joint linkage means.