It is a drive mechanism Reversing
Drawing labels, details, and other text information extracted from the CAD file (Translated from Spanish):
faczminsur eirl, project:, spin converter, mechanical converter:, mechanical converter body, autocad: cfrm, design: elvq, revised :, approved :, plane :, scale :, date :, denomination, cant., material – dimensions, mechanism body, cover – flange, socket bolt, straight fitting, mounting