| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an attachment for a working machine which can keep a braking force of an arm constant over a long period of time when the arm is turned by a touch-turn. <P>SOLUTION: A flow of oil in a hydraulic motor 10 for turning the arm 2 is stopped, the hydraulic motor 10 is used as a braking mechanism, and a drain port 14 of the hydraulic motor 10 and piping 31a for a hydraulic cylinder are connected to each other by means of branch connection piping 33. Thus, since pressure oil is automatically supplied to the hydraulic motor 10 from the side of the piping 31a, the hydraulic motor 10 is constantly filled with the pressure oil, so that the braking force can be kept constant over a long period of time. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
