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LEVER-GEAR PLANETARY MECHANISM WITH DWELLS OF THE DRIVEN ROCKER ARM

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Carrier 1 rotates about fixed axis D and is connected by turning pair B to planet gear 2 which meshes with fixed internal gear 4. Link 5 is connected by turning pairs A and C to gear 2 and to rocker arm 3 which turns about fixed axis E. Point A lies on the pitch circle of gear 2. The dimensions of the links comply with the condition: R=3r, where R and r are the pitch radii of gears 4 and 2. Point A describes a three-cusped hypocycloid. Portion a-a of the hypocycloid differs only slightly from a circular arc of radius C͞A described from point C', corresponding to the extreme right-hand position of link 3. When carrier 1 rotates continuously, rocker arm 3 has a long approximately stationary dwell in its extreme right-hand position EC' and an instantaneous dwell in its extreme left-hand position EC".
$2513$LrG,D$

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Documents: Gear mechanisms  [Streambook]
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