| 摘要 |
PROBLEM TO BE SOLVED: To provide a cam lobe switching mechanism capable of improving responsiveness in a cam lobe switching motion while suppressing complication of a hydraulic circuit structure.SOLUTION: A pin hole H1 accommodating a first lock pin R1, a pin hole H2 accommodating a second lock pin R2, a pin hole H3 accommodating a third lock pin R3 and a forth lock pin R4, and a pin hole H4 accommodating a fifth lock pin R5 are respectively formed on each cam member disposed in a state of successively arranging a first cam base member 12, a high-speed cam lobe member 15, a low-speed cam lobe member 14, and a second cam base member 13 from an A-end side to a B-end side of a cam lobe switching mechanism 11. A first oil passage 18 is formed to supply an oil pressure to a part at the A-end side with respect to the first lock pin R1 in the pin hole H1, a second oil passage 19 is formed to supply an oil pressure to a part between the third lock pin R3 and the forth lock pin R4 in the pin hole H3, and a third oil passage 20 is formed to supply an oil pressure to a part at the B-end side with respect to the fifth lock pin R5 in the pin hole H4.SELECTED DRAWING: Figure 2 |
