| 摘要 |
PURPOSE: To simplify a lubrication structure for bearings by forming bores leading slantingly outwardly from an oil collector trough arranged concentrically around an eccentric shaft in the portion having the largest eccentricity degree of an eccentric with a triangular piston journalled by roller bearings. CONSTITUTION: The engine has a triangular piston 8 journalled by roller bearings 9 to an eccentric 7 integral with an eccentric shaft 6 extending through a housing 1. When the angular portion of the piston 8 slides along a sliding surface formed on an outer peripheral portion 4 of the housing 1, air supply sucked into the working chamber is compressed. The rotation of the piston 8 is controlled by a synchronization device 11. In this case, bores 23 opening to radial bores 24, leading slantingly outwardly from an oil collector trough 21 arranged concentrically around the eccentric shaft 6, at the side of the eccentric 7 opposite the synchronization device 11, in the portion having the largest eccentricity degree of the eccentric 7. An oil leading bore 20 for delivering lubrication to the oil collector trough 21 is arranged in the housing 1. |
