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AssigneeVolkswagen Aktiengesellschaft
InventorRudolf Pauls
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A bearing bushing for a connecting rod and a combination of a connecting rod and a bearing bushing are provided. The connecting rod has a small end which includes a bearing bore. A first region of the bearing bore, which in operation is subjected to compressive loading, is longer than a second region of the bearing bore which is subjected to tensile loading. In order to modify a bearing bushing and a connecting rod so that with simple production and optimized weight the connecting rod has good bearing properties for the piston pin, the bearing bushing already has, before insertion thereof into the bearing bore, a shape adapted to the end edge contour of the bearing bore, wherein the first region of the bearing bushing is likewise longer than the second region thereof. A method of producing such a small end is also disclosed.
A bearing bushing (12) for a connecting rod (1) having a small end (2), which has a bearing bore (3), wherein a first region (6) of the bearing bore (3), which in operation is subjected to compressive loading, is longer than a second region (7) of the bearing bore (3), which is subjected to tensile loading, wherein the bearing bushing (12), when unconnected to the connecting rod (1), has a shape matched to a final edge contour (9) of the bearing bore (3), wherein a first region (17) of the bearing bushing (12) is likewise configured to be longer than a second region (18) thereof, wherein the first regions (6, 6′, 17) both of the small end (2), of the bearing bore (3) and of the bearing bushing (12) merge into the respective second regions (7, 7′, 18) via a curvated profile (16).
A combination of a connecting rod (1) having a small end (2), which has a bearing bore (3), in particular for receiving a pin (36) of an engine piston (37) of a combustion engine, wherein a first region (6) of the bearing bore (3), which in operation is subjected to compressive loading, is longer than a second region (7) of the bearing bore (3), which is subjected to tensile loading, and of a bearing bushing (12) received in the bearing bore (3), a shape of which is matched to a final edge contour (9) of the bearing bore (3) such that the bearing bushing (12), when unconnected to the connecting rod (1), has a shape matched to the final edge contour (9) of the bearing bore (3), wherein a first region (17) of the bearing bushing (12) is likewise configured to be longer than a second region (18) thereof, wherein the first regions (6, 6′, 17) both of the small end (2), of the bearing bore (3) and of the bearing bushing (12) merge into the respective second regions (7, 7′, 18) via a curvated profile (16).
A method for producing a combination of a connecting rod (1) having a small end (2) and of a bearing bushing (12) by boring a bearing bore (3) into the small end (2), wherein a first region (6) of the bearing bore (3), which in operation is subjected to compressive loading, is longer than a second region (7) of the bearing bore (3), which is subjected to tensile loading, wherein the bearing bushing (12), the shape of which before insertion is already matched to a final edge contour (9) of the bearing bore (3), is inserted into the bearing bore (3), wherein a first region (17) of the bearing bushing (12) is likewise configured to be longer than a second region (18) thereof, wherein the first regions (6, 6′, 17) both of the small end (2), of the bearing bore (3) and of the bearing bushing (12) merge into the respective second regions (7, 7′, 18) via a curvated profile (16).
Dependencies are inferred from the claim text.