| 摘要 |
Described herein is a mechanical pulling device having in one example a main shaft with an upper body longitudinally positionable along the main shaft. An upper pivot is provided on each transverse end of the upper body for pivotable attachment of a plurality of upper arms. A lower body is provided; longitudinally positionable along the main shaft with a lower body pivot on opposing lateral sides of the main shaft; the lower body positionable independent of the upper body; a plurality of upper arms each having a first end pivotably attached to the upper body via the upper pivots; each upper arm having a second end with an outer pivot; a jaw arm having a first end pivotably attached to the second end of the upper arm via the outer pivots; each jaw arm having a medial portion pivotably attached to opposing lateral sides of the lower body via the lower body pivot; each jaw arm having a second end opposed to the first end and having a grasping jaw in a plane passing through the axis of the main shaft; and each of the upper body pivots, lower body pivots, and outer pivots having parallel axes of rotation. |
