| 摘要 |
An internal combustion engine utilizing hypocycloid movement has a crankshaft having a small crank pin construction wherein the piston rod end is supported rotatably on an eccentric disc which, in turn, is journalled for rotation on the crankpin. A rigid interconnected subassembly of the eccentric disc, counterweights and a pinion gear is rotatably mounted on the crankpin in a manner to distribute the piston loads to the opposite pin ends, thereby reducing crankpin bending stresses. The main crankshaft support bearings are located directly adjacent the crankpin ends, thereby further reducing crankpin bending stresses. A two-piece crankshaft construction allows the crankshaft to be preassembled for machining, disassembled for mounting the piston subassembly thereon, and reassembled. The modified hypocycloid gearing assembly includes a rotatable internal ring gear transmitting a portion of the torque produced by the piston force to the output shaft via the pinion gear and an idler gear and sun gear assembly. The remaining portion of the torque produced by the piston force is transmitted directly through the crankshaft. An adjustable idler gear mounting allows the modified gear assembly to be adjusted to compensate for gear tooth backlash.
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