公开(公告)号：US20180104845A1

公开(公告)日：2018-04-19

申请号：US15845678

申请日：2017-12-18

申请人： POSITEC POWER TOOLS (SUZHOU) CO., LTD.

发明人： Xi Yu ,  Wei Deng ,  Xiulian Chen

IPC分类号： B27B17/14

CPC分类号： B27B17/14

摘要： A chain saw includes a housing, a sprocket wheel which is provided in the housing for driving a saw chain, and a chain guide for guiding the movement of the saw chain. The chain guide extends out longitudinally from the housing and is movable longitudinally relative to the housing. The chain saw includes a chain tensioning device. The chain tensioning device comprises a driven member arranged on the chain guide, a driving member which drives the driven member to move the chain guide longitudinally, a rotating device rotating the driving member, a clutch device arranged between the rotating device and the driving member, and an elastic component which is disposed between the rotating device and the clutch device. The chain tensioning device presses the chain guide while it tensioning the saw chain. Thus it prevents effectively the chain guide from loosing after the saw chain is tensioned.

公开(公告)号：US20200287397A1

公开(公告)日：2020-09-10

申请号：US16848559

申请日：2020-04-14

申请人： Positec Power Tools (Suzhou) Co., Ltd.

发明人： Shiping Jiao ,  Baoquan Zhang ,  Bincai Lan ,  Zhendong Gao ,  Xiulian Chen ,  Jiang Du

IPC分类号： H02J7/00

摘要： An automatic working system includes a self-moving device powered by an energy module and moving and working in a defined working area. The self-moving device includes a body, a movement module, a task execution module, a control module, and a charging system configured to store external electrical energy in the energy module to charge the energy module. The charging system includes at least two charging modes for charging the energy module. In the different charging modes, the charging system uses different charging logics and/or different charging parameters to charge the energy module. The charging system further includes a charging management module configured to manage the charging modes, to enable the charging system to use a corresponding charging mode to charge the energy module.