Title:
建設機械
Document Type and Number:
Japanese Patent JP6710150
Kind Code:
B2
Abstract:
This construction machine includes a first hydraulic drive device that is driven by a first prime mover and a second hydraulic drive device that is driven by a second prime mover. The first hydraulic drive device has a first closed circuit that connects a first hydraulic actuator and a first closed-circuit pump and a first assist flow path that connects the first closed circuit and a first open-circuit pump and that supplies pressure oil from the first open-circuit pump to the first closed circuit. The second hydraulic drive device is provided with a second closed circuit that connects a second hydraulic actuator and a second closed-circuit pump. The present invention also includes a first emergency flow path that branches from the first assist flow path and connects to the second closed circuit and that supplies pressure oil from the first open-circuit pump to the second closed circuit.
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Inventors:
Teppei Saito
Kenji Hirai
Shimizu Freedom
Hiromasa Takahashi
Kenji Hirai
Shimizu Freedom
Hiromasa Takahashi
Application Number:
JP2016228291A
Publication Date:
June 17, 2020
Filing Date:
November 24, 2016
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
E02F9/22; F15B20/00
Domestic Patent References:
| JP49109778A | ||||
| JP55153277U | ||||
| JP61204427A | ||||
| JP201445665A | ||||
| JP57123332A |
Foreign References:
| US5176504 |
Attorney, Agent or Firm:
Patent Business Corporation Takewa International Patent Office