| 摘要 |
A pinion for an automatic transmission is provided to increase assembly efficiency by reducing the number of the pinion for the automatic transmission. In a pinion for an automatic transmission, a pinion for the auto transmission is formed in a planet gear assembly. The planet gear assembly is composed by a sun gear, a ring gear, and a carrier(300) including the pinion. The plurality pinion gears(100) are formed at the carrier so that it is rotated through a shaft(400). A tooth form is formed on the external circumference of the pinion gear, and the pinion gear is rotated according to the rotation of the carrier. A plurality needle bearing(200) is arranged at the external circumference of a shaft and the internal circumference of the pinion gear in multiple layers. A division protrusion(110) is formed at the internal circumference of the pinion gear, and the height of the division protrusion is lower than that of the diameter of the needle bearing. |
