| 摘要 |
PURPOSE:To enable an automatic loading vehicle to be drawn, by providing a lubricating oil feed means which feeds oil to a lubrication system through the rotated force of a driving wheel when a vehicle is drawn. CONSTITUTION:When driving wheels are earthed for drawn under an engine stop state, an oil pump 2 on the front is brought to a stop, and an oil pressure from an oil pump 2 is not exerted on a control chamber 14. A lower end 18Z of a plunger 18 is brought into contact with a cam shaft 22 through the energizing force of a spring 20. When a vehicle is drawn, a lubricating oil pump 12 is driven through the rotated force of driving wheels, and oil is sucked through a second suction hole in an oil pan into a coupling flow passage 24 through expansion and contraction of a pump chamber 26 to open and close first and second check valves 28 and 30. Oil is fed to a lubrication system through the coupling flow passage 24 to enable an automatic loading vehicle to be drawn.
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