Patent ID: 7451859

Claim:
A magnetic damping device comprising: a) a frame; b) a load wheel; c) a magnetic device having: i) two arched plates including a first arched plate and a second arched plate, each of the two arched plates has a plurality of magnets located thereon; and ii) a connection shaft connected to the frame, a first end of the first arched plate and a first end of the second arched plate are pivotally connected to the frame by the connection shaft; and d) a damping adjusting mechanism having: i) a rotation shaft being rotatable between first and second positions; ii) a rotation plate fixed on the rotation shaft; and iii) two adjustable rods, a second end of the each of the two arched plates is adjustably connected to the rotation plate by one of the two adjustable rods, a first rod end of each of the two adjustable rods is pivotally connected to the rotation plate, a second rod end of each of the two adjustable rods is pivotally connected to a second end of one of the two arched plates, wherein, when the rotation shaft rotates between the first and second positions, the rotation shaft rotates the rotation plate, the rotation plate controls a movement of the two adjustable rods, the two adjustable rods selectively moving the two arched plates inwardly and outwardly thereby selectively adjusting a size of a space located between the plurality of magnets and the load wheel, wherein each adjustable rod of the two adjustable rods comprises: a) two connection rods, a first connection rod of the two connection rods has a rod end having first rod threads wound in a first direction and a second connection rod of the two connection rods has a rod end having second rod threads wound in a second direction opposite the first direction; and b) a dual-side nut located between the two connection rods and having a first threaded nut end having first nut threads corresponding to the first rod threads and a second threaded nut end having second nut threads corresponding to the second rod threads, wherein a length of each adjustable rod is selectively lengthened and shortened by rotating the dual-side nut.