RHOMBIC CRANK-PLANETARY PISTON GEAR Russian patent published in 2010 - IPC F02B75/32 F01B9/02 

FIELD: machine building.

SUBSTANCE: rhombic crank-planetary piston gear comprises case with cylinder (1), stem (2), planetary connecting rods (4) and crankshafts (5). Stem (2) is fixed to piston (14) and is connected via hinge unit with planetary connecting rods (4). Planetary connecting rods (4) are joined to crankshafts (5). Centre-to-centre distances of planetary connecting rods (4) are equal to radii of crankshafts (5). Output shaft is arranged with the possibility to transfer rotation from the right crankshaft (5) by three gears (7), and from the left crankshaft (5) - by two gears (8) with preservation of gear ratio. Hinge unit comprises central hinge (3) and hinge finger (11) fixed on it. Planetary connecting rods (4) have synchronising supports (10). Synchronising supports (10) arranged on the line passing via centres of planetary connecting rods (5) rotation at the distance equal to radius of crankshafts (5) from centres of planetary connecting rods (4) rotation. Seats of supports (10) are arranged in case, on line passing through centres of crankshafts (5) rotation at the distance equal to two radii of crankshafts (5). Line of seat supports location is perpendicular to axis of stem motion (2). Planetary connecting rods (4) may be joined to crankshafts (5) via mount seats. Hinge unit may additionally comprise spherical bearings (12). Crankshafts (5) may be arranged as coaxial and mutually rotating.

EFFECT: increased reliability of gear and simplified technology of manufacturing.

5 cl, 3 dwg