Patent ID: 8421281

Claim:
A linear drive for a machine tool, comprising: a housing, a carriage of a length l 1 which is mounted in the housing so as to be axially movable in a direction of a central axis via two bearings, and at least a first motor comprising a first motor element and a second motor element, wherein the first motor element is designed as a primary part and arranged on the carriage and the second motor element is designed as a secondary part and arranged on the housing, wherein the first bearing and the second bearing are designed as crossed roller bearings and arranged opposite the carriage, relative to the central axis, and at a distance a to the central axis, wherein the primary part is designed flat and extends from the carriage in a radial direction R, relative to the central axis, or parallel to said direction R while the secondary part has a U-shaped cross section which forms a groove-shaped recess and in which the primary part is supported, wherein a second motor is provided which has structure as defined for the first motor and is arranged opposite the first motor, relative to the carriage, wherein both primary parts are arranged in a shared plane E 2 in view of their flat basic shape, wherein the central axis and the two bearings of the carriage are arranged in a shared plane E 1 , which plane E 1 is arranged at right angles to said plane E 2 , wherein all roller bodies of the crossed roller bearing are always operationally linked to a carriage-side bearing surface.