Patent ID: 7306209
Filing Date: 2007-12-11
Classification: F16F

Abstract:
1. A hydraulically damping rubber bush bearing, designed for vertical mounting, the bush bearing comprising: an essentially cylindrical, metallic inner part having an axial length along a bearing axis; a metallic sleeve arranged concentrically with said inner part, said metallic sleeve defining an inner cage located at predetermined distances away from said inner part, said inner cage having a varied axial length parallel to said bearing axis with two opposing long sections having a longest axial extent, and two opposing short sections having a shortest axial extent, each short section being disposed between adjacent long sections, an axial distance between axially outer ends of said short sections being less than the axial distance between the axially outer ends of said long sections; an elastomeric bearing body arranged between said inner part and said inner cage, said elastomeric bearing body being connected with said inner cage by vulcanization, said elastomeric bearing body defining at least two chambers arranged diametrically opposed to one another with respect to said bearing axis and radially arranged between said metallic inner part and said short sections, said two chambers being connected with one another by a channel, said chambers being distributed over at least a portion of the circumference of said elastomeric bearing body, for receiving a fluid damping agent, a radially inner chamber wall of each said chamber passing over from a section following said bearing axis essentially in parallel in an area of at least one of the axial ends of said chamber into a section having a shape sloped relative to said bearing axis and forming an undercut toward a direction of said bearing axis, said elastomeric bearing body having shortened axial extent portions respectively adjacent to said short sections of said inner cage and having longer axial extent portions respectively adjacent to said long sections of said inner cage forming a first axial end outer contour at a first axial end and a second axial end outer contour at a second axial end with a distance between said first axial end outer contour and said second axial end outer contour being less in a region of said shortened axial extent portions than in a region of longer axial extent portions with a first of said chambers located in a first shorter portion of said elastomeric bearing body, between said first axial end outer contour and said second axial end outer contour, in a region of shortened axial extent portions wherein said distance is less with a second of said chambers located a second shorter portion of said elastomeric bearing body, between said first axial end outer contour and said second axial end outer contour, in another region of shortened axial extent portions wherein said distance is less with said first of said chambers separated from said second of said chambers by a first longer portion of said elastomeric bearing body, between said first axial end outer contour and said second axial end outer contour, in a region of longer axial extent portions wherein said distance is greater with said first of said chambers separated from said second of said chambers by a second longer portion of said elastomeric bearing body, between said first axial end outer contour and said second axial end outer contour, in a region of longer axial extent portions wherein said distance is greater with said first shorter portion of said elastomeric bearing body located between said inner part and said inner cage and between said first longer portion of said elastomeric bearing body and said second longer portion of said elastomeric bearing body with said second shorter portion of said elastomeric bearing body located between said inner part and said inner cage and between said first longer portion of said elastomeric bearing body and said second longer portion of said elastomeric bearing body; and a fluid damping agent in said first chamber and said second chamber.