Patent ID: 9541176
Date: 2017-01-10
CPC Classifications: B21D,B23Q,F16H,Y10T

Claim:
1. A drive device for a movement unit of a machine tool, comprising: a first toothed element driven by a drive motor and provided as a drive pinion including a first tooth arrangement; and a second toothed element provided as a toothed rack including a second tooth arrangement, wherein one of the first and second toothed elements is connected to a machine frame, and the other of the first and second toothed elements is connected to the movement unit, wherein the first and second toothed elements are moved relative to each other along a movement axis of the first and second toothed elements by the drive motor via a meshing between the first and second tooth arrangements and via an engagement between the first and second tooth arrangements along an engagement axis that extends perpendicularly to the movement axis, wherein the first and second toothed elements are resiliently supported on each other parallel to the engagement axis via at least one of the first and second toothed elements that serves as a resilient toothed element, the resilient toothed element being supported by a resilient bearing device on a connection element, by which the resilient toothed element is connected to the machine frame or to the movement unit, in such a manner that the resilient toothed element, under a redirection action of a redirection force (F wherein an action line of the redirection force (F wherein, for the resilient toothed element, there is provided a torque compensator in addition to the resilient bearing device, wherein the torque compensator counteracts a redirection rotation movement of the resilient toothed element that results from the redirection force (F wherein the torque compensator for the resilient toothed element has a redirection member that, at a side of the resilient toothed element, is pivotably articulated about a first pivot axis at the side of the resilient toothed element, and at a side of the machine frame connected to the resilient toothed element or to the movement unit that is connected to the resilient toothed element, is pivotably articulated about a second pivot axis remote from the resilient toothed element, the first and second pivot axes extending parallel to the rotation axis of the resilient toothed element, and, as a result of a redirection force (F