公开(公告)号：US11444505B2

公开(公告)日：2022-09-13

申请号：US15733636

申请日：2018-11-06

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Zhengqiang Pei ,  Ping Yu ,  Haitao Jin ,  Pengfei Liu

IPC: H02K5/12 ,  H02K5/124 ,  H02K5/173

Abstract: The present disclosure relates to the field of shaft sealing, and particularly relates to a sealing structure of an electric-machine-shaft extension end. The sealing structure of an electric-machine-shaft extension end includes an electric-machine end cap and an electric-machine-shaft extension end, the electric-machine-shaft extension end is mounted to the electric-machine end cap via a bearing, a double-oil-seal structure is provided between the electric-machine end cap and the electric-machine-shaft extension end, the double-oil-seal structure includes an oil-seal seat that is connected to the electric-machine end cap and an outer-side oil seal and an inner-side oil seal that are provided inside the oil-seal seat, the outer-side oil seal and the inner-side oil seal are provided face to face, and are interference-fitted to the oil-seal seat, and an oil storing chamber and an oil-seal spacer ring contained inside the oil storing chamber are provided between the outer-side oil seal and the inner-side oil seal.