Hydraulic antivibratory devices
First Claim
1. A hydraulic antivibratory device for insertion between and connection to two rigid elements, comprising:
- a pair of rigid frames firmly connectable, respectively, one to each of the two rigid elements;
an elastomer spacer structure connecting the two frames together and forming partially therewith two sealed chambers, a restricted passage placing the two sealed chambers into permanent communication with each other;
a liquid mass filling the two chambers and the restricted passage;
at least one rigid movable member having a surface partially defining at least one of the two chambers, said movable member being mounted for limited oscillating movement along an axis generally perpendicular to said surface, guide means for guiding said movable member for movement substantially only in directions parallel to said axis;
at least one electrically energized force applying means for applying to said movable member a force in at least one of two opposite directions parallel to said axis;
sealing means for sealing that portion of said movable member adjacent to the force applying means;
a control system for making the supply of electric power to the electrically energized force applying means dependent on movements of said movable member, such that energization of the electrically energized force applying means is capable of reducing, which includes canceling out, movements of the movable member;
said control system comprising a sensor for detecting said movements in the vicinity of the movable member.
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Accused Products
Abstract
A hydraulic antivibratory support is disclosed comprising two rigid frames, an elastomer structure forming therewith two sealed chambers, a restricted passage causing the two chambers to communicate permanently with each other, a liquid mass filling the two chambers and the restricted passage, a rigid ferromagnetic movable member partially defining one of the two chambers, and electric coils for applying alternating forces to this movable member, said movable member being guided axially and the air gaps being isolated from the liquid. A control system is provided making the electric energization of the coils dependent on the axial movements of the movable member itself by means of a sensor so as to reduce movements of the movable member.
25 Citations
19 Claims
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1. A hydraulic antivibratory device for insertion between and connection to two rigid elements, comprising:
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a pair of rigid frames firmly connectable, respectively, one to each of the two rigid elements; an elastomer spacer structure connecting the two frames together and forming partially therewith two sealed chambers, a restricted passage placing the two sealed chambers into permanent communication with each other; a liquid mass filling the two chambers and the restricted passage; at least one rigid movable member having a surface partially defining at least one of the two chambers, said movable member being mounted for limited oscillating movement along an axis generally perpendicular to said surface, guide means for guiding said movable member for movement substantially only in directions parallel to said axis; at least one electrically energized force applying means for applying to said movable member a force in at least one of two opposite directions parallel to said axis; sealing means for sealing that portion of said movable member adjacent to the force applying means; a control system for making the supply of electric power to the electrically energized force applying means dependent on movements of said movable member, such that energization of the electrically energized force applying means is capable of reducing, which includes canceling out, movements of the movable member; said control system comprising a sensor for detecting said movements in the vicinity of the movable member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification