| 摘要 |
An articulated linkage mechanism 10 comprises a motor 11 arranged to produce a torque force on a drive shaft 12. A crank 13 is mounted to the drive shaft 12 at a first mounting position 14 located at a first end 15 of the crank 13. A second mounting position 16 at a second end 17 of the crank 13 is attached to a link 18 at a first end 20 of the link 18. At a second mounting position 21 on the link 18 at a second end 22, which is remo te from the first end 20, a load, not illustrated, is attached. At an intermediate pivot mounting position 23 of the link 18, an arm 26 is attached and a remote end 30 of the arm 26 i s fixed to an anchorage position 31. The motor 11 is fixed and the second mounting positio n 29 of the arm 26 is fixed with respect to the first mounting position 14 of the crank 13. The movement of the link 18 is constrained by the arm 26 such that the crank 13 is able to rotate through a range of angles greater than + 270.degree..
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