Spoke line staggered arrangement's metal magnetic end lining board is pressed to magnetic pole

The utility model relates to a protection milling machine barrel body end cover is surperficial, reduces a spoke line staggered arrangement's metal magnetic end lining board is pressed to magnetic pole of its wearing and tearing. Constitute by shell (1), the magnetic path (2) of group and bonding agent. Shell (1) is with the not metal material manufacturing of magnetic conduction, and is fan -shaped for approximate ring, has two surfaces of working face (3) and installation face (4). Shell (1)'s installation face (4) is the box shape that the fan -shaped check (5) of a plurality of rings forms, and the polarity orientation that the (2) of the magnetic path of packing into in check (5) group, the (2) of magnetic path group pack check (5) into makes the (2) polarity identical of magnetic path group who lies in on the same spoke line position, and the magnetic path (2) of the group polarity on the adjacent spoke line position is opposite, and this makes magnetic field direction become thecircumferencial directio