Bearing cap structure for engine
AssigneeSuzuki Motor Corporation
InventorTakashi Suzuki
Life of this patent
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Abstract
A core member has a core member side journal portion and a core member bolt hole on both sides of the core member side journal portion and is provided in a separation state from a surface of a casting mold through a cast-off pin including a step portion in a vertical direction in the casting mold. A radius of curvature of the core member side journal portion of the core member is made greater than a radius of curvature of the cap side journal portion of the bearing cap in such a manner that a clearance between the cap side journal portion and the core member side journal portion is larger than a clearance between the core member bolt hole and the cast-off pin. A pouring gate is provided on a side surface of the casting mold to inject a base material along the bonding portion of the bearing cap.
Claims9
A bearing cap structure for an engine, comprising:
- a bonding portion for being bonded to an engine member;
- a cap side journal portion which supports a shaft member;
- a core member formed of a different material from a base material for bearing cap and provided in a casting mold when casting a bearing cap, the core member including a core member side journal portion and core member bolt holes provided on both sides of the core member side journal portion;
- wherein the core member side journal portion is provided along the cap side journal portion, and
- wherein the core member is provided in a separation state from a surface of the casting mold through a cast-off pin including a step portion in a vertical direction in the casting mold, and
- wherein a radius of curvature of the core member side journal portion is made greater than a radius of curvature of the cap side journal portion in such a manner that a clearance between the cap side journal portion and the core member side journal portion is larger than a clearance between the core member bolt hole and the cast-off pin.
Dependencies are inferred from the claim text.