Patent ID: 6318204
Filing Date: 2001-11-20
Classification: F16H,Y10T

Abstract:
A screw mechanism comprising:a spindle (1) which is secured in an axial direction and which has a spindle axis (1'),a spindle nut (5) which is connected to a slide (7), which can be driven and which is guided in the axial direction, anda joint which is provided between the spindle nut (5) and the slide (7) and which compenstates for relative transverse movements and tilting between the spindle nut (5) and the slide (7),said joint being formed symmetrically with respect to the spindle axis (1') and having two joint axes which are perpendicular to each other, which intersect on the spindle axis (1') and which are assigned at one end to the transverse movement of a bearing plate (6), said joint being connected to the spindle nut (5) at one end thereof, and connected at the other end to the transverse movement of a bearing plate (8) that is connected to the slide (7), said joint containing an intermediate plate (9) via which the bearing plates (6, 8) are connected pivotably to each other in order to compensate for any tilting of their joint axes, andwherein the joint axes are each formed by two balls (19, 20; 19', 20') which are aligned with one another on opposite sides of the spindle axis (1'), and which are mounted in mutually opposite prism grooves (17, 18; 17', 18') in the bearing plates (6, 8) and the intermediate plate (9), wherein the bearing plates (6, 8) and the intermediate plate(9) are biased together under spring pressure (13, 16; 13', 16').