Construction equipment
First Claim
1. Construction equipment having a plurality of hydraulic actuators, the construction equipment further comprising:
- a hydraulic recovery circuit for recovering return oil from the hydraulic actuators, the circuit being equipped with a rotating machine rotatably driven by the recovered return oil;
oil guide passages each of which is for guiding return oil from the meter-out side of its corresponding hydraulic actuator to the hydraulic recovery circuit;
switching means for switching the respective oil guide passages between their opened and closed states;
pressure detecting means for detecting the back pressure of each hydraulic pressure actuator; and
a dynamo-electric generator for generating electric power from the rotary force of the rotating machine.
1 Assignment
0 Petitions
Accused Products
Abstract
Compact, low-cost construction equipment capable of effectively recovering energy from a plurality of hydraulic actuators is provided. To this end, the construction equipment comprises: a hydraulic recovery circuit for recovering return oil from the hydraulic actuators, the circuit being equipped with a pump motor rotatably driven by the recovered return oil; oil guide passages each of which is for guiding return oil from the meter-out side of its corresponding hydraulic actuator to the hydraulic recovery circuit; switches for switching the respective oil guide passages between their opened and closed states; pressure sensors for detecting the back pressure of each hydraulic pressure actuator; and a dynamo-electric generator for generating electric power from the rotary force of the pump motor.
39 Citations
4 Claims
-
1. Construction equipment having a plurality of hydraulic actuators, the construction equipment further comprising:
-
a hydraulic recovery circuit for recovering return oil from the hydraulic actuators, the circuit being equipped with a rotating machine rotatably driven by the recovered return oil;
oil guide passages each of which is for guiding return oil from the meter-out side of its corresponding hydraulic actuator to the hydraulic recovery circuit;
switching means for switching the respective oil guide passages between their opened and closed states;
pressure detecting means for detecting the back pressure of each hydraulic pressure actuator; and
a dynamo-electric generator for generating electric power from the rotary force of the rotating machine. - View Dependent Claims (2)
-
-
3. Construction equipment having a plurality of hydraulic actuators, wherein at least two sets of hydraulic energy recovering means are provided, each hydraulic energy recovering means comprising:
-
a hydraulic recovery circuit for recovering return oil from the hydraulic actuators, the circuit being equipped with a rotating machine rotatably driven by the recovered return oil;
oil guide passages each of which is for guiding return oil from the meter-out side of its corresponding hydraulic actuator to the hydraulic recovery circuit;
switching means for switching the respective oil guide passages between their opened and closed states;
pressure detecting means for detecting the back pressure of each hydraulic pressure actuator; and
a dynamo-electric generator for generating electric power from the rotary force of the rotating machine. - View Dependent Claims (4)
-
Specification