| 摘要 |
The tree trimming apparatus includes a cutting head assembly adapted to be mounted to the end of a pole by a mounting bracket. A main lever arm is pivotally mounted at a first end to a support arm of a hook of the cutting head assembly, and a pulley receiving a rope for manual operation of the cutting or shearing blade is connected to the main lever arm. First and second parallel spaced apart link members are pivotally connected at their upper end portions to first and second sides of the blade lever arm, and are pivotally connected at their lower end portions to the first and second sides of the main lever arm, medially and near an end of the main lever arm. A coil return spring is connected between the lever arm of the cutting blade and a point on the main lever arm medially of the link members. |
