| 摘要 |
The present invention relates to an electromagnetic chuck which functions as an electromagnet installed in a knuckle crane truck in a scrap yard or a construction site allowing peripheral scrap metals to be attached thereto which probably has the areas on the edges have relatively low magnetic forces, wherein the edge areas are capable of having improved magnetic forces by having permanent magnets operated when the electromagnetic chuck is operated. According to the present invention, an electromagnetic chuck for a knuckle crane truck comprises: a case (110); a first magnetic force generating unit (120) mounted on the internal center of the case (110) having a hollow core with a hole-shaped central portion, and a coil wound on the core; a magnetic force connecting unit (130) closely coupled to the side portions of the first magnetic force generating part (120); and second magnetic force generating units (140) having one end fixated to the case (110) and the other end selectively connected to the magnetic force connecting unit (130). |
