Hybrid construction machine

摘要

A electric storage device and a controller are disposed efficiently without obstructing ventilation, with a vehicle size equivalent to that of a normal shovel. A hybrid construction machine includes a device case which internally accommodates an electric storage device and a controller, and the device case is provided in a space above an upper frame, in a front portion of the upper frame and on the opposite side of two vertical plates from the cabin, and constitutes up-and-down steps which are formed in a rearward-ascending step shape so as to be able to be ascended and descended.

主权项

1. A hybrid construction machine, comprising:
a lower propelling body; an upper frame which is provided so as to be able to slew on the lower propelling body; an engine compartment which is provided in a rear portion of the upper frame; a left and right pair of vertical plates which extend in a front/rear direction in an intermediate portion in a left/right direction of the upper frame; a cabin which is provided in a space above the upper frame at a position on an outside of the both vertical plates in the left/right direction; a work attachment having a base end section which is attached on a front portion of each of the vertical plates by a boom foot pin; a motor-generator capable of operating as an electric motor and an electric generator; an engine serving as a drive source for causing the motor-generator to operate as an electric generator; an electric storage device which constitutes a power source for causing the motor-generator to operate as an electric motor, and which is charged by the motor-generator operating as an electric generator; a slewing electric motor which drives the upper frame to slew by using the electric storage device as a power source; a controller which controls operation of the motor-generator, the slewing electric motor and the electric storage device; and a device case which internally accommodates the electric storage device and the controller, wherein the device case is provided in a space above the upper frame, in a front portion of the upper frame and on an opposite side of the both vertical plates from the cabin, and constitutes up-and-down steps which are formed in a rearward-ascending step shape so as to be able to be ascended and descended, wherein the controller includes an inverter which controls operation of the motor-generator and the slewing electric motor, and a hybrid controller which outputs control commands to the inverter and the electric storage device, the hybrid controller is arranged on the electric storage device and has an upper surface, the inverter is arranged to the rear of the hybrid controller above the electric storage device and has an upper surface disposed at a position higher than the upper surface of the hybrid controller, and the device case includes a first step surface, a second step surface arranged one step above the first step surface and provided above the upper surface of the hybrid controller, and a third step surface arranged one step above the second step surface and provided above the upper surface of the inverter.