| CPC F16H 25/24 (2013.01) [F16C 27/066 (2013.01); F16H 2025/204 (2013.01); F16H 2025/2436 (2013.01)] | 20 Claims |
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1. A linear drive, comprising:
a drive housing extending along a housing longitudinal axis, which drive housing encloses a housing interior in which a linearly movable output member extends axially, which output member projects out of the drive housing with an anterior end section usable for force applying and which output member has a hollow output rod in which a rod cavity open at the rear is formed,
wherein the output member has a spindle nut which is arranged in the housing interior and is secured against rotation with respect to the drive housing, wherein a threaded spindle passes through the spindle nut, wherein the threaded spindle is in threaded engagement with the spindle nut and has a spindle longitudinal axis extending in the axial direction of the housing longitudinal axis, which threaded spindle, starting from a rear end section of the drive housing, projects through the spindle nut into the rod cavity and configured to be driven by a rotary drive apparatus, which performs a rotary drive movement about the spindle longitudinal axis, resulting in a linear output movement of the output member relative to the drive housing,
wherein an anterior end section of the threaded spindle positioned in the rod cavity is radially supported on an inner peripheral surface of the output rod radially bounding the rod cavity by a support apparatus which has a sliding sleeve coaxial with the threaded spindle, on which sliding sleeve a support area extending in a spindle peripheral direction around the spindle longitudinal axis is formed radially on the outside, along which support area the output rod slides with its inner peripheral surface during its output movement,
wherein the support apparatus has a rolling bearing positioned on the threaded spindle and supporting the sliding sleeve, which rolling bearing allows the threaded spindle to rotate relative to the sliding sleeve, and
wherein the sliding sleeve is divided into a plurality of sliding sleeve segments which are positioned in succession in the spindle peripheral direction and are connected to one another via resilient joints, so that they can be pivoted independently of one another in a radial direction relative to one another and relative to the rolling bearing by a respective swivel area with respect to the spindle longitudinal axis, wherein the support area is formed by support area sections formed on the individual sliding sleeve segments and elastically flexibly prestressed against the inner peripheral surface of the output rod by the resilient joints.
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