| 摘要 |
A differential drive actuator includes a first gear or circular member having a first plurality of teeth and a second gear or circular member disposed adjacent the first circular member and having a second plurality of teeth distinct in number from the first plurality of teeth. The circular members are commonly driven by a gear or pinion. Because of the distinct or disparate number of teeth on the two circular members, they will rotate at slightly different speeds. The circular members also include complementary cam faces, cam recesses and balls, a cam and cam follower or threaded members which, upon such different rotational speeds, cause the circular members to axially translate or separate. Such axial translation may be utilized to actuate or move valves, dampers, plates, clutches, steering mechanisms, shutters and a wide variety of devices controlled or adjusted by linear motion. |
