| 摘要 |
<p>PROBLEM TO BE SOLVED: To increase the limit load of the seizure of a cam in the operating condition of an internal oil feeding type hollow cam shaft. SOLUTION: An oil distribution hole 4 is formed to the shaft 2 and the cams 3 of an internal oil feeding type hollow cam shaft 1, and oil feeding holes 5 are formed to the cams 3 almost square to the oil distribution hole 4. The cam 3 furnishes a base circle surface 7, and a cam surface 6 including a convex surface 8 projecting from the base circle surface 7 in the diameter direction. The lubricating oil is fed to the cam surface 6 through the oil feeding hole 5. The intermediate part 11 of the cam surface 6 is formed within the scope of 20 deg. to 35 deg. to the center line passing through the center of a nose surface formed on the convex surface 8, and the center of the cam 3, and the other end 5b of the oil feeding hole 5 is connected to the intermediate part 11.</p> |
