Patent ID: 8807543

Claim:
An elastomer bush bearing with a stiffness switchable in a radial direction (r), with a cylindrical metallic inner part ( 1 ), a tubular outer part ( 3 ) surrounding the inner part, an elastomeric bearing body ( 2 ) arranged between the inner part ( 1 ) and the outer part ( 3 ), and at least one pair of working chambers ( 4 , 4 ′), arranged with an offset in relation to a circumferential direction (u) of the bush bearing, for receiving a fluid, as well as a bearing sleeve ( 5 ) receiving the metallic inner part ( 1 ), the elastomeric bearing body ( 2 ), and the tubular outer part ( 3 ), wherein by blocking or unblocking inflow of a fluid into at least one of the working chambers ( 4 , 4 ′) with an actuator, or by blocking or unblocking outflow of the fluid from at least one of the working chambers ( 4 , 4 ′), the radial stiffness of the bush bearing is adjustable in a region of the working chambers ( 4 , 4 ′), wherein the bearing body ( 2 ) is divided in the radial direction (r) by at least one insert ( 6 ) arranged in the bearing body ( 2 ) parallel to a bearing axis ( 12 ) into a radially inner spring packet ( 7 ) and a radially outer spring packet ( 8 ) with only the radially outer spring packet ( 8 ) receiving the working chambers ( 4 , 4 ′), and that each of the working chambers ( 4 , 4 ′) is divided into several chamber sections ( 9 1 - 9 n ) extending in the radial direction (r) inside the radially outer spring packet ( 8 ) and the outer part ( 3 ), and at least one chamber section ( 10 ) extending in the axial direction (a) and connecting the chamber sections ( 9 1 - 9 n ) with one another, wherein the elastomeric bearing body ( 2 ), in the radially outer spring packet ( 8 ) bounded by the insert ( 6 ) and the outer part ( 3 ), is segmented, in the axial direction, by the chamber sections ( 9 1 - 9 n ) of the working chambers ( 4 , 4 ′) that protrude into the elastomeric bearing body ( 2 ), wherein the tubular outer part ( 3 ) has a length, in the axial direction, defined between a first end and a second end located opposite to the first end of the tubular outer part ( 3 ), wherein at least a portion of the working chambers ( 4 , 4 ′) is located inside of a portion of the length of the tubular outer part ( 3 ) between the first and second ends of the tubular outer part ( 3 ), wherein the chamber sections ( 9 1 - 9 n ) extend through the tubular outer part ( 3 ) at two or more positions along the length of the tubular outer part ( 3 ), thereby forming at least two distinct holes extending through the tubular outer part ( 3 ) at two or more positions along the length of the tubular outer part ( 3 ).