| 摘要 |
A drive mechanism (10) or transmission for transmitting power and/or motion to an object includes an input driving member (14), an output driven member (26), and a rigid coupling member (36). By changing the arrangement of the driving and driven members and the shape of the rigid coupling member, the object can be either rotated continuously, rotated in a reciprocated motion, or translated. A positioning apparatus (1010) including the drive mechanism disclosed above is also disclosed which in one embodiment includes two orthogonal tracks (1024), each having a rail (1042) and a carriage (1022) coupled to the tracks and having pulleys in frictional engagement with the rails. Rotation of the pulleys causes the carriage and/or one of the tracks to be moved in one of the directions. In another embodiments only one track is used for translation in a single direction. |
