公开(公告)号：US20190072158A1

公开(公告)日：2019-03-07

申请号：US16085068

申请日：2017-03-14

Applicant: KOREA AUTOMOTIVE TECHNOLOGY INSTITUTE

Inventor： Se IL SONG ,  Chulwoo MOON

IPC: F16H3/78 ,  F16H3/54 ,  B60T1/00 ,  B60L15/20 ,  F16D23/02 ,  F16D11/14

Abstract: A two-stage transmission for an electric vehicle of the present invention comprises: a gearbox unit; a driving unit for providing power into the gearbox unit; a sun gear unit embedded in the gearbox unit and rotated by being axially connected to the driving unit, a planetary gear unit embedded in the gearbox unit, and provided in engagement with an outer side part of the sun gear unit; a carrier unit embedded in the gearbox unit and rotatably supporting the planetary gear unit; a ring gear unit embedded in the gearbox unit, and provided on the outer side of the carrier unit and engaged with the planetary gear unit; a first synchro unit axially connected to the driving unit so as to rotate together with the sun gear unit, and selectively connected to the carrier unit so as to adjust variable speeds; and a second synchro unit mounted in the gearbox unit, and selectively coupled to the ring gear unit so as to adjust variable speeds.