| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide construction machinery capable of efficiently recovering potential energy of a bucket, a boom, and an arm. <P>SOLUTION: The construction machinery is provided with a boom assist cylinder 7A that hydraulically assists a motion of a boom 4 and an arm assist cylinder 8A that hydraulically assists the motion of an arm 5. The boom assist cylinder 7A is connected with an accumulator 16 through a first hydraulic piping. The arm assist cylinder 8A is connected with the accumulator 16 through a second hydraulic piping 16. The second hydraulic piping 12 is connected with the arm assist cylinder 8A in such a way that the hydraulic fluid from the accumulator 16 is supplied to the arm assist cylinder 8A to close the arm 5. <P>COPYRIGHT: (C)2012,JPO&INPIT |
