Piston and Magnetic Bearing for Hydraulic Hammer

A hydraulic hammer includes a power cell. A work tool is partially received in, and movable with respect to, the power cell. A sleeve is positioned in the power cell that defines a centerline. A piston is concentrically positioned in the sleeve and movable in the sleeve between a first position in contact with the work tool and a second position out of contact with the work tool. A magnetic guide system includes at least one of a first magnetic guide component disposed in the piston and at least one of a second magnetic guide component disposed in the sleeve that interact to produce magnetic repellent forces therebetween to urge the radial position of the piston towards the center line. 液压锤包括动力单元。作业工具部分地容纳在动力单元中并且可相对该动力单元移动。套筒位于该动力单元中并限定中心线。活塞同心地定位于套筒中并且可在该套筒中在与作业工具接触的第位置与不与作业工具接触的第二位置之间移动。磁导系统包括设置在活塞中的至少个第磁导部件以及设置在套筒中的至少个第二磁导部件，该第磁导部件和该第二磁导部件相互作用以在其间产生排斥磁力从而推动该活塞径向位置朝向中心线。