| 摘要 |
PURPOSE:To simplify wiring and electric circuit, by providing a spring for biasing a valve member in a direction apart from a solenoid to permit fluid pressure control by the single solenoid. CONSTITUTION:A fluid sealed bushing 10 includes an inner sleeve 11, an outer sleeve 13 fixed to front and rear ends of a radius rod 4, an an intermediate sleeve 14 arranged coaxially between the inner sleeve 11 and the outer sleeve 13. A cylindrical solenoid 32 is provided in an axial half space between the inner sleeve 11 and the intermediate sleeve 14, while a cylindrical valve member 35 is axially slidably provided in the other half space. An attracted flange 41 is fixed through its cylindrical portion 42 to the inner circumferentce of the valve member 35. There is defined a first space between the attracted flange 41 and one end of the valve member 35. There is also defined a second space between a solenoid case 33 and a small-diameter portion 35a formed at the other end of the valve member 35 around the outer circumference of the inner sleeve 11. A coil spring 43 is provided in the second space under compression where communication holes 15 and 16 are opened. When the solenoid 32 is supplied with current, the coil spring 43 closes the communication holes 15 and 16, and its spring constant is increased. |
