| 摘要 |
A three-directional vibration isolator, connecting two bodies, which includes spring elements for coupling vibratory forces between the bodies and an inertia assembly for generating inertia forces to attenuate these vibratory forces. The assembly includes a drive member having one end coupled to one body to allow pivotal movement about a first assembly pivot point and an opposite end which extends axially through a tubular member and which is coupled to radially-extending, equiangularly-disposed, inertia arms to allow pivotal movement of the arms about respective first pivot axes orthogonal to the assembly axis. One end of the tubular member is coupled to the other body to allow pivotal movement about a second assembly pivot point and an opposite end thereof is coupled to the inertia arms to allow pivotal movement of the arms about respective second pivot axes parallel to the first pivot axes. Axially-directed vibratory forces cause vibratory movements of the inertia arms which generate inertia forces to oppose these vibratory forces. Vibratory forces acting orthogonally of the assembly axis cause vibratory movements of the entire assembly which generate inertia forces to oppose these vibratory forces. Assembly parameters are selected so that axial movement of one body relative to the other not only causes a change in the distance r' between the two assembly pivot points, but also causes a corresponding change in the distance R' between the assembly center of gravity and the adjacent assembly pivot point, so that the ratio R'/r' is essentially constant.
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