| 摘要 |
PURPOSE:To supply a stable energizing force with a simple structure and alter the damping power of a dumper in a wide range by forming one part of a member forming a magnetic path using a permanent magnet as an initial energizing means. CONSTITUTION:A valve body 1 is formed of a disk-formed permanent magnet with its inside made the N pole and its outside the S pole as an initial energizing means, and a solenoid 6 is fitted at the piston rod 3 of a magnetic material through the holder 7 of a non-magnetic material on the opposite side to the valve body 1 having a valve sheet 2 formed of a magnetic material in between and is covered with a case 8 of a magnetic material with its ends being in contact with the outer peripheral part 2A of the valve sheet 2 and the piston rod 3. In this structure, the valve main body 1 is always energized in the valve closing direction by the flux formed by the permanent magnet, and this energizing force is increased or decreased by the flux formed by the solenoid 6 according to its direction and strength. The damping force of a dumper can be thus altered in a wide range by the control of the electrifying direction and electrifying quantity to the solenoid 6. |
