Lubricating oil supplying structure for crankshaft
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKeiji Kaita
Life of this patent
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Abstract
More lubricating oil can be supplied to a connecting rod bearing provided in a connecting rod to provide excellent lubrication between the connecting rod and a crank pin. A pair of oil groove portions 13a and 13b is provided in an inner circumferential surface portion 17 of a crank journal bearing 11, which extends in the movement direction of a piston 32 and which is disposed opposite to each other. A lubricating oil supplying passage 28 is provided between the crank journal 10 and the crank pin 20, one end portion 29 of which is opened to the groove portions 13a and 13b provided in the crank journal bearing 11, the other end portion 30 of which is opened to an inner circumferential surface portion 23 of the connecting rod bearing 22, and which supplies the lubricating oil to the connecting rod bearing 22.
Claims10
A lubricating oil supplying structure for a crankshaft, which is provided within the crankshaft disposed within a cylinder block of an engine and which supplies lubricating oil from a crank journal bearing supporting a crank journal to a connecting rod bearing provided in a crank pin,
- wherein a pair of oil groove portions is provided in an inner circumferential surface portion of the crank journal bearing, each of said pair of oil groove portions extending in a direction of piston movement and crossing mating surface construction members for support of the crank journal, and
- a lubricating oil supplying passage is provided between the crank journal and the crank pin, one end portion of which is opened to the oil groove portions provided in the crank journal bearing, the other end portion of which is opened to an inner circumferential surface portion of the connecting rod bearing, and which supplies the lubricating oil to the connecting rod bearing.
A lubricating oil supplying structure for a crankshaft, the lubricating oil supplying is provided within the crankshaft, which is disposed within a cylinder block of an engine, the lubricating oil supplying structure supplies lubricating oil from a crank journal bearing supporting a crank journal to a connecting rod bearing provided in a crank pin, the lubricating oil supplying structure comprising:
- a pair of oil groove portions provided in an inner circumferential surface portion of the crank journal bearing, the pair of oil groove portions located on opposite sides of the inner circumferential surface portion relative to a line that passes through a center point of the crank journal bearing, the line extending in a direction that is parallel to a movement direction of a piston of the engine, and
- a lubricating oil supplying passage provided between the crank journal and the crank pin, a first end portion of the lubricating oil supplying passage is opened to the oil groove portions provided in the crank journal bearing, and a second end portion of the lubricating oil supplying passage is opened to an inner circumferential surface portion of the connecting rod bearing, the lubricating oil supplying passage supplies the lubricating oil to the connecting rod bearing.
Dependencies are inferred from the claim text.