Patent ID: 6930412

Claim:
A closed box structure of a horizontal linear motor machine tool, comprising: a frame serving as a machine platform, said frame including an X-movable parts a Y-movable part, and a Z-movable part, with said Y-movable part mounted on said X-movable part, said Z-movable part mounted on said Y-movable part, and said Z-movable part having a main axis head; wherein said frame, said X-movable part, and said Y-movable part are shaped like open squares, said X-movable part, said Y-movable part, and said Z-movable part are each associated with a set of two linear motors, such that for each of said sets of linear motors, magnetic forces are balanced against each other so that deformation due to magnetic forces is avoided, each axis of said frame includes a main gliding rail and an auxiliary gliding rail, and said X-movable part has an open central part with parallel opposing inner walls to which parallel gliding rails are attached, allowing said Y-movable part to glide thereon.