| 摘要 |
PROBLEM TO BE SOLVED: To provide a gear capable of surely guiding lubricant to a tooth surface with a simple structure, and capable of being easily manufactured.SOLUTION: A gear includes: a shaft part having an axial hole thereinside; a disk part formed so as to extend in an outer peripheral direction from the shaft part; a rim part formed so as to further extend in the outer peripheral direction from the disk part, and having a tooth surface on an outer peripheral surface radially outside; a recess part provided on the side surface of the disk part; a rib part provided on the side surface of the disk part along a radial direction so as to be adjacent to the recess part; a first oil passage provided in the shaft part, and communicating the axial hole and the recess part; and a second oil passage provided in the rim part, and communicating the recess part and the tooth surface.SELECTED DRAWING: Figure 2 |
