发明名称 |
WORK MACHINE |
摘要 |
A work machine is adapted for reduced fuel consumption in regions where swinging by a hydraulic motor is prone to deterioration in efficiency, such as when the operating stroke of the swinging is small. The work machine includes an engine, a hydraulic pump, a swing structure, an electric motor for driving the swing structure, and a hydraulic motor for driving the swing structure, the hydraulic motor being driven by the hydraulic pump, and includes a swing control lever device that commands the swing structure to be driven. A control device operates in either an electric swing mode in which the swing structure is driven mainly by torque of the electric motor or a hydraulic swing mode in which the swing structure is driven mainly by torque of the hydraulic motor, depending on an operating stroke of the control lever device and/or a swing speed of the swing structure. |
申请公布号 |
US2016003266(A1) |
申请公布日期 |
2016.01.07 |
申请号 |
US201414768570 |
申请日期 |
2014.08.28 |
申请人 |
HITACHI CONSTRUCTION MACHINERY CO., LTD. |
发明人 |
IMURA Shinya;ISHIKAWA Kouji;SATAKE Hidetoshi;NISHIKAWA Shinji;KANETA Tomoaki;IZUMI Shiho |
分类号 |
F15B11/20;F15B13/08;F15B11/04 |
主分类号 |
F15B11/20 |
代理机构 |
|
代理人 |
|
主权项 |
1. A work machine comprising:
an engine; a hydraulic pump driven by the engine; a swing structure; an electric motor for driving the swing structure; a hydraulic motor for driving the swing structure, the hydraulic motor being driven by the hydraulic pump; and a swing control lever device that commands the swing structure to be driven, wherein the work machine further comprises a control device operates in either an electric swing mode in which the swing structure is driven mainly by torque of the electric motor or a hydraulic swing mode in which the swing structure is driven mainly by torque of the hydraulic motor, depending on an operating stroke of the control lever device and/or a swing speed of the swing structure. |
地址 |
Tokyo JP |