| 摘要 |
A parallel-kinematical machine (1) that includes at least three setting devices (4.1, 4.2, 4.3) which can be lengthened and shortened individually, wherein each setting device (4.1, 4.2, 4.3) is connected to a positioning head (11) via a first joint (8, 9, 10), wherein each setting device (4.1, 4.2, 4.3) is connected to a base (2) via a universal joint (3.1, 3.2, 3.3), and wherein the positioning head (11) is movable within a working range in response to manoeuvring of the setting devices (4.1, 4.2, 4.3), wherein at least two reinforcing beams (5.1, 5.2, 5.2.1, 5.2.2) are connected to the positioning head (11) via a respective beam rotation bearing (100.1, 100.2), each having solely one degree of freedom, wherein each reinforcing beam (5.1, 5.2, 5.2.1, 5.2.2) adapted to slide transversely in a beam bearing (17.1, 17.2, 17.2.1, 17.2.2) in the base (2) when one or more of the setting devices (4.1, 4.2, 4.3) is lengthened or shortened, wherein each beam bearing (17.1, 17.2, 17.2.1, 17.2.2) is connected to the base (2) via a beam-universal-joint (BU1, BU2) and wherein the beam bearing (17.2, 17.2.1, 17.2.2) of at least one reinforcing beam (5.2, 5.2.1, 5.2.2) is rotatable about an axis that extends parallel with the longitudinal axis of said reinforcing beam (5.2, 5.2.1, 5.2.2). |
