| 摘要 |
PURPOSE:To automatically adjust damping force so as to be able to produce the damping force stable to temperature change by a method wherein magnetic fluid, the viscosity of which is changed by magnetic force, is used as buffer medium and the viscosity of said magnetic fluid is changed electrically. CONSTITUTION:A hollow piston rod 3, a piston 2 with oil passages, and a fixed rod 4, at the root of which an exciting coil 6 is wound, are provided in a cylinder 1, within which magnetic fluid is sealed. The cylinder 1, the piston 2 and the fixed rod 4 form a magnetic circuit 7. The damping force is automatically regulated by the change of the viscosity of the magnetic fluid passing through the orifice 5 formed between the fixed rod 4 and the hollow rod 3 due to the temperature-change dependent change of the amount of electric current passing through the exciting coil 6 and an element 8, the resistance of which lowers itself in proportion to the rise of its temperature, connected with each other in series. |
