| 摘要 |
A main objective of the present invention is to provide an active mount which receives power only when a rod unit is lifted and lowered. The active mount has a nozzle plate mounted between an insulator and a diaphragm to divide the inside thereof into an upper fluid chamber and a lower fluid chamber, allows sealed hydro-fluid to flow through a passage formed on the nozzle plate according to a change in the volume of the fluid chambers, and comprises: the nozzle plate having a second passage which is separated from the passage and connects the upper and the lower fluid chamber; the diaphragm mounted on a lower portion of the nozzle plate to form the lower fluid chamber; and a rod unit mounted on the diaphragm to allow the upper end thereof to close the second passage when lifted and open the second passage when lowered, mounted on a spring to apply an elastic force in a rising direction, and lowered by an electromagnetic force when power is applied to a coil. The active mount further comprises a locking unit to maintain the rod unit in a lowered state even if power is not applied to the coil when the rod unit is lowered. A first sawtooth unit is formed on the circumference of the lower end of the rod unit in a serrated shape. The locking unit comprises: a lower gear having a second sawtooth unit formed on the circumference of the upper end thereof in a serrated shape to be meshed with the first sawtooth unit, and a latch unit protruding from the outer circumferential surface thereof; and a locking pipe having a plurality of stopping grooves formed on the inner circumferential surface thereof, wherein the lower gear is embedded therein, and the lower end of the rod unit is inserted thereinto. The stopping grooves comprise a first groove which the latch unit cannot enter and a second groove which the latch unit can enter. The first and the second groove are continuously arranged adjacent to each other along the circumference. |
