MAGNETIC VISCOUS FLUID SHEAR TYPE BRAKING DEVICE AND DAMPING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a braking device and a damping device with use of a magnetic viscous fluid, with simple structure, inexpensive, and imposing less load on seal materials.;SOLUTION: The braking device 1 includes: a cylinder 2 filled with the magnetic viscous fluid; a rod 3 penetrating the cylinder 2 while freely entering into and exiting from the cylinder in the axial direction; and electromagnets 6 forming a magnetic field perpendicular to the axial direction of the rod 3. The seal material 5 is installed in a port of the cylinder 2 through which the rod 3 enters and exits. The plurality of the electromagnets 6 are placed side by side in the axial direction and fixed inside a sidewall of the cylinder 2. When the rod 3 is pushed into one end of the cylinder 2 and pulled out of the other end with respect to the cylinder 2, magnetic powder clusters C are formed in each of which magnetic powders dispersed in the magnetic viscous fluid are arranged in the direction of the magnetic field by the magnetic field of the electromagnet 6. Shear stress of the magnetic powder clusters C accompanied by the movement of the rod 3 strengthens viscous resistance, to generate a moving load in the direction of hampering the rod movement.;COPYRIGHT: (C)2011,JPO&INPIT