Active type vibration isolating support system

An active type vibration isolating support system comprising:

• an elastic body for elastically supporting a vibratory body on a supporting system;
• a liquid chamber defined by the elastic body, in which liquid is sealed;
• a movable member for changing capacity of the liquid chamber;
• and
• an electromagnetic actuator for driving the movable member,
• wherein the actuator comprises:
• a fixed core to be supported on the supporting system;
• a movable core to be coupled to the movable member for being arranged opposite to the fixed core via a conical tube-shaped air gap;
• a coil for generating an electromagnetic attracting force between the fixed and movable cores;
• a coupling device coupled to the movable member to penetrate the movable core in an axial direction to be relatively movable to support a fixed core-side end surface of the movable core;
• a set spring provided between the movable member and the movable core in a compressed state, for biasing the movable core toward a supporting portion of the coupling device;
• and
• a stopper member which, even after the movable core has reached a limit of movement on the fixed core-side end surface, enables movement of the movable member toward the fixed core-side end surface while the movable member compresses the set spring, and, in order to restrict compression and deformation of the set spring in a predetermined amount or more, limits an amount of movement of the movable member after the movable core reaches the limit of movement, wherein operating said coupling device adjusts the air gap between the fixed core and the movable core.

An active type vibration isolating support system comprising:

• an elastic body for elastically supporting a vibratory body on a supporting system;
• a liquid chamber defined by this elastic body, in which liquid is sealed;
• a movable member for changing capacity of this liquid chamber;
• and
• an electromagnetic actuator for driving this movable member,
• wherein the actuator comprises:
• a fixed core supported by the supporting system;
• a movable core coupled to the movable member and arranged opposite to the fixed core via an air gap;
• a coil for generating an electromagnetic attracting force between the fixed and movable cores;
• coupling devices for coupling the movable member and the movable core to adjust the air gap between the fixed core and the movable core,
• a housing for accommodating and holding the fixed core and the coil of the actuator;
• a yoke fixed to the housing and having a cylindrical portion surrounded by the coil;
• a cylindrical bearing member slidably fitted on an inner peripheral surface of the cylindrical portion of the yoke for slidably supporting the movable core;
• an outward lower flange formed at a lower end of the cylindrical bearing member and supported on a supporting portion continuing to the fixed core;
• a set spring provided between the lower flange and the cylindrical portion of the yoke in a compressed state for urging the lower flange against the cylindrical portion;
• and
• an inward upper flange formed at an upper end of the bearing member for receiving the movable core to define a limitation of movement of the movable core in a direction apart from the fixed core.