Switchable bearing

A switchable bearing comprising:

• a cup-shaped housing;
• an annular spring element of an elastomeric material sealing said cup-shaped housing;
• a separating wall between the spring element and the housing, said separating wall having at least one flow-through opening, said separating wall and said spring element delimiting a working chamber, said separating wall and said cup-shaped housing delimiting a compensating chamber, the working chamber and the compensating chamber communicating through the flow-through opening, said working chamber and said compensating chamber being filled with a hydraulic fluid;
• and
• a control unit, said control unit comprising a piston operative to seal the flow-through opening, the piston arranged at least partially in the compensating chamber, the piston being actuated by a pressurized medium, the control unit further comprising an aneroid chamber, said aneroid chamber being mounted in the cup-shaped housing and capable of being charged with a pressurized medium, the aneroid chamber being delimited by a first ring diaphragm, said first ring diaphragm being resilient and sealing off said piston and said aneroid chamber from said housing, said piston being surrounded in a fluid-tight manner by a second ring diaphragm, said second ring diaphragm being a roller diaphragm and which, together with said separating wall, delimits the compensating chamber, said separating wall comprising two parts and having performations said separating wall surrounding an annular membrane only in the area of the perforations.

A switchable bearing comprising:

• a cup-shaped housing;
• an annular spring element of an elastomeric material sealing said cup-shaped housing;
• a separating wall between the spring element and the housing, said separating wall having at least one flow-through opening, said separating wall and said spring element delimiting a working chamber, said separating wall and said cup-shaped housing delimiting a compensating chamber, the working chamber and the compensating chamber communicating through the flow-through opening, said working chamber and said compensating chamber being filled with a hydraulic fluid;
• and
• a control unit, said control unit comprising a piston operative to seal the flow-through opening, the piston arranged at least partially in the compensating chamber, the piston being actuated by a pressurized medium, the control unit further comprising an aneroid chamber, said aneroid chamber being mounted in the cup-shaped housing and capable of being charged with a pressurized medium, the aneroid chamber being delimited by a first ring diaphragm, said first ring diaphragm being resilient and sealing off said piston and said aneroid chamber from said housing, said piston being surrounded in a fluid-tight manner by a second ring diaphragm, said second ring diaphragm being a roller diaphragm which, together with said separating wall, delimits the compensating chamber.