| 摘要 |
PURPOSE: A transmission device is provided to prevent impact during transmission and to improve reliability of mechanism. CONSTITUTION: A transmission device comprises a first carrier(21), a first planetary gear(31), the first sun gear shaft, a ring gear cover(5), and a clutch(6). The first carrier is connected to an input unit. The first planetary gear is rotatably coupled to the first carrier. The first sun gear shaft comprises a first sun gear(41) engaging with the first planetary gear and is coupled to a hub shaft connecting with an output object. A first ring gear engaging with the first planetary gear is formed in the inner circumference of the ring gear cover and a disk is formed in the outer circumference thereof. The ring gear cover is coupled to the outside of the first sun gear. The clutch controls speed according to select one of a high speed mode, in which the ring gear cover is clinched to the disk to be fixed, and a low speed mode, in which the ring gear cover is separated from the disk to be rotated. |
