| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricant supply structure of an internal combustion engine, in which an oil chamber is formed outside in an axial direction of a bearing member of a crank journal, an oil pressure is hardly applied on an oil seal of the oil chamber, and design of an oil chamber capacity has a high degree of freedom.SOLUTION: In a lubricant supply structure of an internal combustion engine, a crank journal 51bL of a crankshaft 51 is supported by a bearing member 54L on a crank case 5a, an oil seal 101 is installed on the crankshaft and an oil chamber 100 is formed outside the crank journal in an axial direction, an oil reservoir 105 is formed between an outside surface 103 of a crank web 51cL and a side plate 104 attached to the outside surface and the oil reservoir 105 communicates with the oil chamber via an oil groove 106 formed on the outside surface of the crank journal, and lubricant is introduced to the oil chamber and supplied from the oil reservoir to a predetermined lubrication point via a hollow part 107 in the crank pin 51a. A discharge port 108 for discharging the lubricant of a predetermined quantity or more is formed on the side plate 104. |
