| 摘要 |
An operative arm of an earth moving machine includes a dipper stick having a distal end, a bucket coupled to the distal end of the dipper stick, a hydraulic actuator coupled to the dipper stick, and a linkage generally interposed between the bucket and the hydraulic actuator. The linkage includes the following items: (i) a lever rotatably coupled to the dipper stick and the hydraulic actuator, (ii) a linear actuator, (iii) a coupler rotatably coupled to the lever and the linear actuator, and (iv) a bucket lever interconnecting the coupler, the linear actuator and the bucket.
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