POWER STEP FOR MANUAL DRIVE OF PIPELINE ACCESSORIES Russian patent published in 2011 - IPC F16K31/05 

FIELD: machine building.

SUBSTANCE: power step of manual drive of pipeline accessories consists of tooth gear with higher ratio - higher transmission. The gear is mounted on a driving shaft controlled with a working flywheel. The driving shaft is equipped with a half-clutch engaging a response half-clutch mounted on the driving shaft of the gear with a lower ratio - lower transmission. An end half-clutch of a lower transmission engages the response half-clutch spring loaded relative to the driving shaft of the higher transmission. The latter is controlled with a switching flywheel installed between spokes of the working flywheel. This flywheel is secured on the central shaft run through the driving shaft of the higher transmission. The half-clutch of engagement of the higher transmission is mounted on the driving shaft of the lower transmission coaxially and movably and is connected to the end half-clutch of engagement of the lower transmission movably-rotatingly.

EFFECT: simplified mechanism of switching due to elimination of adjustment of steps of drive from higher ratio to lower ratio and vice versa.

1 dwg