Patent ID: 6398468
Filing Date: 2002-06-04
Classification: B23Q,Y10T

Abstract:
A machine tool quill spindle assembly for holding machine tool cutting tools, comprising:a quill assembly; a spindle assembly, including a tool end and a machine end, rotationally mounted within said quill assembly for rotating a tool attached to its tool end; a plurality of spindle coolant flow paths extending axially within and through said spindle assembly to allow a cooling fluid to circulate within and through said spindle assembly; a hollow rod assembly extending axially within said spindle assembly and having a first end fixedly mounted proximate the machine end of said spindle assembly, and having a second end fixedly mounted proximate the tool end of said spindle assembly, said hollow rod assembly having an inner portion forming a portion of a first of said plurality of spindle coolant flow paths and an outer portion surrounded by a portion of a second of said plurality of spindle coolant flow paths; a check valve assembly, having a first side and a second side, mounted within said spindle assembly and positioned proximate the second end of said hollow rod assembly, the first side of said check valve assembly being in fluid communication with the first of said plurality of spindle coolant flow paths and the second side of said check valve assembly being in fluid communication with the second of said plurality of spindle coolant flow paths; a spindle pulley coupled to the machine end of said spindle assembly; a motor coupled to said quill assembly; a belt wound around said spindle pulley and a motor pulley coupled to a rotor of said motor; a rotary seal assembly coupled to the machine end of said spindle assembly, said rotary seal assembly including at least first and second coolant flow ports; a hollow tube assembly having a first end fixedly coupled within said rotary seal assembly proximate said first coolant flow port so that coolant directed into said first coolant flow port flows into an inside portion of said hollow tube assembly, and having a second end fixedly coupled proximate said hollow rod assembly so that the inside portion of said hollow tube assembly is in fluid communication with the inner portion of said hollow rod assembly; and a coolant channel in fluid communication with said second coolant flow port and the second of said plurality of spindle coolant flow paths, wherein the first of said plurality of spindle coolant flow paths provides cooling fluid to a cutting tool installed on the tool end of said spindle assembly, and wherein the second of said plurality of spindle coolant flow paths provides cooling fluid proximate bearing assemblies that rotationally mount said spindle assembly within said quill assembly.