| 摘要 |
The invention concerns a controllable variable length link device. It comprises a first half-link ( 12 ) having a first end ( 12 a) for connection to a driving system ( 16 ) and a second end ( 12 b), a second half-link ( 14 ) having a first end ( 14 a) for connection to a driven system ( 18 ) and a second end ( 14 b), a rotary displacement member ( 20 ) including a rotator shaft ( 22 ) and a rotary head ( 24, 26 ) cooperating with said second ends ( 12 b, 14 b) of said links to bring about opposite movement of said half-links, bearing means ( 34, 36 ) in which said rotator shaft ( 22 ) is mounted, respective means ( 38, 40 ) for guiding said two half-links ( 12, 14 ) in translation in at least two parallel directions, said drive means being mechanically connected to said bearing means; and means for driving said shaft ( 22 ) in rotation in both directions in accordance with a predetermined law.
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