Patent ID: 7647903

Claim:
A variable valve lift device of an internal combustion engine, comprising: a rocker arm ( 31 ) linked and connected to an engine valve ( 20 ) having a cam abutment part ( 50 ) abutting to a valve operating cam ( 29 ); a first link arm ( 58 ) with one end portion rotatably connected to the rocker arm ( 31 ) and the other end portion rotatably supported at a fixed position of an engine body ( 11 ) via a fixed support shaft ( 57 ); a second link arm ( 59 ) with one end portion rotatably connected to the rocker arm ( 31 ); a movable support shaft ( 60 ) which rotatably supports the other end portion of the second link arm ( 59 ); a crank member ( 61 ) connected to the movable support shaft ( 60 ) allowing the movable support shalt ( 60 ) to perform angular displacement around an axis parallel with its axis and rotatably supported at the engine body ( 11 ); and drive means ( 62 ) connected to the crank member ( 61 ) to make the movable support shaft ( 60 ) perform angular displacement, wherein the crank member ( 61 ) is formed in a crank shape, having crank webs ( 61 a ) sandwiching the second link arm ( 59 ) from opposite sides, and a connecting part ( 61 c ) integrally joining both the crank webs ( 61 a ) at a position where interference with the second link arm ( 59 ) is avoided, and the movable support shaft ( 60 ) is connected to the crank member ( 61 ) to connect both the crank webs ( 61 a ).