| 摘要 |
The machine, e.g. an excavator comprises coupling 18 for releasably connecting tools 19 to an articulated arm 13. The coupling includes a first coupling members 16 supported on the arm 13, a second coupling member 17 provided on each of the tools 19, a locking member 38 provided on the first coupling member 16 and movable between lock and release positions, a spring 39 arranged between the first coupling member 16 and the locking member 38 for urging the locking member 38 into the lock position, and a hydraulically operated release mechanism 34 provided on the first coupling member 16 for moving the locking member 38 into the release position in opposition to the force of the spring 39. Hydraulic fluid at a pressure relief pressure level is applied through a first non-return valve 59 to release the locking member 38 and permit detachment of one tool 19 and attachment of another tool 19; the pressurized hydraulic fluid is then released through a second non-return valve to return the locking member 38 into the lock position, thereby retaining the newly attached tool 19 under pressure of the spring 39. <IMAGE> |
