| 摘要 |
A pressure-fluid operated actuator with a vane pivoting in a casing has a biasing spring in a two-part housing attached at one end to one part of the housing and at the other end to the vane. To adjust the spring bias said one housing part is rotatable by a worm and wormwheel mechanism. The worm is carried by said one housing part. The other housing part is fixed to the casing and has the wormwheel integrally formed on it. The wormwheel teeth are quadrant-form with an end face in a plane normal to the vane pivot axis and containing the worm axis so that the housing parts can be die cast or moulded and can be brought together axially to intermesh the worm and wormwheel. The transverse force on the worm is transmitted through its toothing to its housing part.
|
