Lubrication of a one way clutch in a transmission mechanism

• Main Authors: MASAKI YONEYAMA, HISAO OTSUKA
• Format: Patent
• Language: English
• Published: 02.05.2007
• Subjects: BLASTING; BRAKES; CLUTCHES; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; COUPLINGS FOR TRANSMITTING ROTATION; CRANKCASE VENTILATING; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; LUBRICATING INTERNAL COMBUSTION ENGINES; LUBRICATING OF MACHINES OR ENGINES IN GENERAL; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR; STARTING OF COMBUSTION ENGINES; STEAM ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

A transmission mechanism for a starter motor in an internal combustion engine, comprises a thrust pad 51 disposed closer to a main bearing 6 of a crankshaft 4 than a one-way clutch C, and includes oil holes 52, located in the same position in the radial direction as the bearing 51, for allowing lubricating oil that has flowed out of the main bearing 6 and scattered to flow in the oil holes 52 and then to flow out thereof toward the bearing 51. The one-way clutch C includes a radial direction oil passage 62 for deflecting the lubricating oil which has flowed in from the oil holes 52 and passed through while lubricating a roller bearing 41, outward in the radial direction and thereby guiding the lubricating oil to a housing space 34 in which sprags 33 are housed. A discharge oil passage 39 located in the same position in the radial direction as outer portions 33a of the sprags 33, for discharging the lubricating oil in the housing space 34. Thus lubrication of a bearing 51 and a one-way clutch C is improved by facilitating oil supply to the bearing 51.