| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid-enclosed vibration control device, in which an orifice member having a vibration plate of rubber at a center hole can be formed of one metal piece at low cost. SOLUTION: The orifice member 41 is integrally provided with a circular member 42 on the outer circumferential side, and a vibration plate 48 as a thick plate of rubber elastic matter to close the center hole 42a in it. The circular member is provided with a cylindrical part 43, and a pair of circular flange parts 44 protruded diametrically outward at both axial ends of it. A circular recess on the outer circumferential side surrounded by these is set as an orifice passage 45. In the circular member, a disconnection part 46 is provided to close the orifice passage formed by crushing the flange part at a circumferential part in an axial direction. In the flange part, a pair of fluid flow inlet/outlet ports 47 are formed to open to a main liquid chamber on in the circumferential direction on one side over the disconnection part, and open to a subsidiary liquid chamber on the other side. The vibration plate is formed to be vulcanization-bonded along the whole inner circumferential surface of the center hole in the circular member. COPYRIGHT: (C)2005,JPO&NCIPI |
