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    • 43. 发明公开
    • LINK ACTUATION APPARATUS
    • EP3858557A1
    • 2021-08-04
    • EP19867647.0
    • 2019-09-24
    • NTN Corporation
    • NOSE, KenzouISOBE, Hiroshi
    • B25J11/00F16C41/00F16H21/46
    • A link actuation apparatus includes: a parallel link mechanism (10) including a proximal-side link hub (12), a distal-side link hub (13), and three or more link mechanisms (14) each coupling the distal-side link hub (13) to the proximal-side link hub (12) such that a posture of the distal-side link hub (13) can be changed relative to the proximal-side link hub (12); posture control drive sources (11); and a control device (2). The control device (2) includes an abnormality detector (4) including: a measurement section (5) configured to measure a predetermined state value which is affected by abnormality in revolute pair parts of a link actuation apparatus body (1) constituted by the parallel link mechanism (10) and the posture control drive sources (11); and a determination section (6) configured to determine if any of the revolute pair parts has abnormality in on the basis of a measurement result obtained by the measurement section (5). For example, the measurement section (5) measures rigidity, or driving torque or the like.