| US 7,506,862 B2 | ||
| Elastomer bush bearing with axial limit stop | ||
| Hubert Siemer, Dinklage (Germany); and Bernarda Holtze, Dinklage (Germany) | ||
| Assigned to ZF Friedrichshafen AG, Friedrichshafen (Germany) | ||
| Filed on Jul. 12, 2005, as Appl. No. 11/179,810. | ||
| Claims priority of application No. 10 2004 034 632 (DE), filed on Jul. 16, 2004. | ||
| Prior Publication US 2006/0012092 A1, Jan. 19, 2006 | ||
| Int. Cl. F16F 5/00 (2006.01); F16M 13/00 (2006.01) | ||
| U.S. Cl. 267—141.3 [267/141; 267/293] | 12 Claims |
| 1. An elastomer bush bearing comprising an inner sleeve (1), an elastomer bearing body (2), which surrounds the inner sleeve (1) and is connected with the inner sleeve by vulcanization and forms an elastomer spring, an outer sleeve (3) receiving the bearing body (2) with the inner sleeve (1), and at least one axial limit stop (6, 6′, 7, 7′), which limits the axial compression spring travel of the bearing body (2) when oscillations are introduced axially in the bearing and which is formed by two stop faces (6, 7, 6′, 7′) which face each other in the axial direction (a) and are spaced apart by a gap (s, s′), wherein a first stop face (6, 6′) is formed on the bearing body (2) and a second stop face (7, 7′) is formed on the inner sleeve (1) or on a stop element (4, 4′) supported by the inner sleeve (1),
wherein the first stop face (6, 6′) and the second stop face (7, 7′) are rotatable relative to each other in the circumferential direction of the bearing by an actuator (5) or displaceable relative to each other in the axial direction (a), wherein their mutual separation as determined by the
gap (s, s′) is changeable simultaneously with a corresponding relative motion of the stop faces (6, 6′, 7, 7′) effected by a rotation of the actuator,
wherein the inner sleeve (1) comprises two cylindrical sleeve sections (1′, 1″) which slidingly engage with each other and are movable relative to each other in the axial direction (a), wherein a first
sleeve section (1″) is connected with the bearing body (2) through vulcanization and a second sleeve section (1′), is displaceable relative to the first sleeve section (1″) and therefore by a rotation of the actuator also relative to the bearing body (2) that is connected with the first sleeve section (1″), the second sleeve section (1′) includes on at least one axial end the second stop face (7, 7′), which in cooperation with the first stop face (6, 6′) of the bearing body (2) located opposite in the axial direction (a) forms the at least one axial limit stop (6, 6′, 7, 7′),
wherein the first sleeve section (1″) connected with the bearing body (2) through vulcanization has on a section protruding axially from the bearing body (2) a circumferential groove (9) or channel disposed at a constant axial height (h) along at least a portion of its circumference, with a pin (10) arranged on the rotatable actuator (5) guided in the groove or channel, wherein the pin (10) protrudes through an opening (8) which extends along a portion of the circumference of the second sleeve section (1′), with the opening (8) having a pitch (Δh) relative to the axial direction (a), so that the first and second sleeve sections (1′, 1″) are axially displaced against each other by the pin (10) during a rotation of the actuator (5).
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