Patent ID: 6604269
Filing Date: 2003-08-12
Classification: B23Q,Y10T

Abstract:
A machine tool apparatus for machining workpieces, comprising:a spindle housing having a spindle shaft including a tool receptacle configured to receive at least one tool, said spindle housing having a bore configured to receive an operating medium to lubricate and cool moving parts, wherein the bore is in fluid communication with bearings and is configured for discharging at least some of said operating medium from the housing to thereby lubricate and cool said moving parts; a drive device configured to impart a rotating motion directly to the spindle shaft, wherein the drive device comprises a hydraulically driven displacement machine having a cylinder block; wherein the cylinder block includes said opening configured to receive an operating medium, at least one piston in communication with the opening, and a bore directly receiving the spindle shaft to provide power to the spindle shaft without the use of a drive shaft between the spindle shaft and the drive device, such that operation of the drive device using the operating medium received by the opening causes rotation of the cylinder block and rotation of the spindle shaft received within the bore of the cylinder block; wherein the spindle housing comprises a hole and an annular groove in fluid communication with the hole; and wherein the spindle shaft comprises a recess in fluid communication with the annular groove and the tool receptacle such that an operating fluid to lubricate and cool is free to flow through the hole, groove, and recess to the tool receptacle, so as to provide a continuous pathway for flow of the operating fluid to lubricate and cool, such that the operating fluid to lubricate and cool can lubricate and cool the at least one tool.