Hybrid-type working machine
AssigneeHitachi Construction Machinery Co., Ltd.
InventorsYasunori Ota, Mitsugu Ojima, Shuji Egawa, Yuji Azuma
Life of this patent
Estimating the term…
Abstract
An assist generator motor is driven by an engine to generate power or assists in a drive of the engine by supply of power from an electricity storage device. A revolving electric motor is driven by power supplied from the electricity storage device or supplies regeneration power generated by a regeneration operation to the electricity storage device. The assist generator motor is controlled by a first inverter. The revolving electric motor is controlled by a second inverter. The first inverter and the second inverter are mounted on a support bracket elastically supported on a revolving frame in a position different from a position where the electricity storage device is mounted.
Claims6
A hybrid-type working machine comprising:
- an automotive vehicle body provided with a working mechanism;
- an engine that is disposed on said vehicle body and drives a hydraulic pump;
- a first electric motor that is driven by said engine to generate power or assists in a drive of said engine by supply of power;
- an electricity storage device that stores power generated by said first electric motor or discharges power therein;
- a second electric motor that is driven by power supplied from said electricity storage device or supplies regeneration power generated by a regeneration operation to said electricity storage device;
- a first inverter for controlling an operation of said first electric motor;
- and
- a second inverter for controlling an operation of said second electric motor, characterized in that:
- said first inverter and said second inverter are mounted on a support bracket elastically supported on said vehicle body in a position different from a position where said electricity storage device is mounted,
- said first inverter and said second inverter are connected by a connecting line in which a cooling medium for cooling said first inverter and said second inverter circulates,
- said support bracket, said first inverter, said second inverter and said connecting line are configured as an inverter assembly,
- an inlet line is connected to one inverter of said first inverter and said second inverter, said inlet line causing the cooling medium for cooling said first inverter and said second inverter to flow into said one inverter, and an outlet line is connected to said other inverter, said outlet line causing the cooling medium having cooled said first inverter (46) and said second inverter to flow out,
- a plurality of cables are connected respectively to said first inverter and said second inverter, and
- said support bracket is provided with cable fixing tools for fixing said plurality of cables respectively and line fixing tools for fixing said inlet line and said outlet line respectively.
Dependencies are inferred from the claim text.