TH84640B - Lubrication structure of valve gears. - Google Patents

Abstract

That is provided for the lubrication structure of the valve gears that allows for the maintenance of proper lubrication performance to improve durability. The lubrication structure 70 of the present invention consists of valve gear 22, which comprises an intake rocker arm 55 supported by cylinder head 31, designed for cylinder 21 of engine 4, and an intake rocker arm 57, which is supported by the rotatable arm of intake rocker arm 55 and is positioned to contact intake valve 50; a mounted regulator 44, which is positioned to the contact surface 90 between the intake rocker arm 57 and intake valve 50 and is used to assemble cylinder 21; an oil passage 71, which is constructed in the mounted regulator 44; and an injection section 75, which is constructed in the mounted regulator 44 to inject oil in the oil passage 71 to the contact surface 90.

Claims (5)

1. The lubrication structure of the valve gear consists of: a valve gear comprising a rocker arm shaft supported by the cylinder head design of an internal combustion engine, and a rocker arm that can rotate around the rocker arm shaft and is positioned to contact the intake and exhaust valves; a regulator mounted on the contact surface between the rocker arm and the valve and used to engage the cylinder; an oil passage created in the regulator; and an injection section created in the regulator to inject oil into the oil passage to the contact surface. 2. The lubrication structure of the valve gear according to claim 1, which is further comprised of: an internal shaft passage created in the rocker arm shaft and designed to supply oil to the rotating parts of the rocker arm, and a transmission section designed to transmit the internal shaft passage and the oil passage to each other, where the internal diameter of the injection section is created to be larger than the internal diameter of the transmission section. 3. Lubrication structure of the valve gear according to claim 1 or 2, additionally incorporating ribs to stop oil injected from the injection section and to reflect oil back to the contact area. 4. Lubrication structure of the valve gear according to claim 3, where the valve gear is arranged in the cylinder head which is mounted on the cylinder block protruding horizontally from the crankcase, where the ribs are arranged at a position higher than the valve. 5. Lubrication structure of the valve gears according to claim 3 or 4, where ribs protrude from the inner surface of the cylinder head or cylinder head cover designed to cover the cylinder head to the contact area.