Little arc source magnetic structure

The utility model discloses a little arc source magnetic structure, including the magnet subassembly, main shaft, seal assembly, synchronizing wheel, parallel key, locating sleeve ring, main shaft height regulating mechanism, a main shaft is connected to the below of magnet subassembly, the main shaft penetrates seal assembly, the synchronizing wheel, its characterized in that sets up first keywayon the main shaft, set up a parallel key in the first keyway, the parallel key is embedded into in the recess that the second keyway seted up on first keyway and the synchronizing wheel constitutes,the below of synchronizing wheel sets up a locating sleeve ring, set up a main shaft height regulating mechanism in locating sleeve ring's below, through set up a main shaft height regulating mechanism on the main shaft, carry out the regulation under far away, the nearly state of magnetic structure, under the pivoted situation that does not influence little arc source magnetic structure, form little arc source magnetic st