Elevation adjusting device of belt-form saw machine

An elevation adjustable saw machine comprising:

• a saw unit and an elevation adjusting unit installed on a machine table, and a transfer belt passing between the saw unit and the machine table for transporting an article to the saw unit for cutting;
• the saw unit including a rotary wheel and a belt-form saw teeth member coupled thereto, the rotary wheel having a rotary shaft connected to a driving wheel;
• the rotary wheel being driven by a motor;
• the belt-form saw teeth member being at least partially disposed within a casing;
• and,
• the elevation adjusting unit including at least a pair of oil pressure rotary units and at least a pair of elevating adjusting rods extending respectively therefrom to elevationally support the casing, the elevation adjusting unit including an oil box portion coupled to actuate at least one oil pressure rotary unit for controlling elevational displacement of the saw unit by oil pressure, each elevation adjusting rod having a screw rod portion screw-drive engaged to one oil pressure rotary unit;
• a universal linkage extending transversely between the oil pressure rotary unit for mechanically coupling the operations thereof;
• the elevation adjusting rods being operably coupled one relative to the other thereby for concurrent displacement in synchronized manner responsive to at least one of the oil pressure rotary units;
• and
• wherein the elevation adjustable rods are passed in angularly displaceable manner through respective sleeve seats formed on the machine table, each of the sleeve seats including at each axially opposed and thereof a removable copper cover member coaxially and slidably engaging the elevation adjusting rod passing through the sleeve seat.