Level adjusting device for a cutter head of a jointer/planer machine

A level adjusting device for a cutter head of a jointer/planer machine which includes infeed and outfeed tables opposite to each other in a longitudinal direction, the cutter head including a knives-mounting body which is elongated along a rotating axis that is transverse to the longitudinal direction, and which has front and rear journal segments extending respectively from two opposite sides of the knives-mounting body along the rotating axis, said level adjusting device comprising:

• a front support frame which is adapted to be interposed between said infeed and outfeed tables, and which has a front seat wall facing upwardly;
• a rear support frame which is adapted to be interposed between said infeed and outfeed tables, and which is spaced apart from said front support frame along the rotating axis, said rear support frame including left and right base abutments which face upwardly, and which are spaced apart from each other in the longitudinal direction;
• a front anti-friction bearing unit which is adapted to journal said front journal segment, and which is disposed to rest on said front seat wall so as to hold the front journal segment at a predetermined height;
• a rear anti-friction bearing member adapted to journal said rear journal segment;
• a height-adjustable carrier having an insertion bore which defines a centerline and which is configured to permit said rear anti-friction bearing member to be fitted therein to thereby bring the rotating axis in line with the centerline;
• left and right lugs which are disposed respectively outboard of said height-adjustable carrier and opposite to each other in the longitudinal direction, each of said left and right lugs having an inner tubular threaded surface extending in an upright direction that is transverse to both the longitudinal direction and the rotating axis;
• and
• left and right adjusting screws, each having a threaded segment which is threadedly engaged with said inner tubular threaded surface of a respective one of said left and right lugs, and an abutting end which is opposite to said threaded segment, and which is configured to be turnable about a revolving axis in the upright direction, said abutting end being kept in frictional engagement with a respective one of said left and right base abutments during turning of said abutting end such that, by virtue of the turning of said abutting end, the respective one of said left and right lugs is moved relative to a respective one of said left and right adjusting screws so as to raise or lower the centerline of said height-adjustable carrier based on the predetermined height, thereby enabling level adjustment of the knives-mounting body.