JPS63158735U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a front cutaway view of the present invention, Figures 2A and 2B are enlarged cutaway views of the engagement portion between the tool pulling shaft and the drive shaft, and Figure 3 is the carbic gear, bayonet teeth, and drive gear. FIG. 4 is an explanatory diagram of the prior art. 1...Main shaft ram, 11...Main shaft, 20...Retraction shaft, 2
2... Frame body, 25... Spline shaft, 26... Drive shaft,
27, 39, 43, 46...Gear, 28...Pull stud, 31...Intermediate shaft, 32...High speed main shaft, 33...Pull stud, 34...Tool holder, 36...Retraction pin, 37...Collect, LS1, LS2...Limit switch.

Claims (1)

[Scope of utility model registration request] In a vertical machining center that has a spindle ram member that can be moved and positioned in the Z-axis direction on a ram head that is slidably mounted on a cross rail or top beam in the Y-axis direction, the high-speed spindle is removably fixed to the lower end of the spindle ram member. The attachment has a frame body, a pushle stud located at the center of the frame body, which is removably attached to the main shaft taper hole, and which is pulled in the axial direction by a tool pulling mechanism at the tip of the taper shank, and has a spline hole at the bottom of the center hole. A drive shaft having a first gear engraved on the outer periphery, and a spline to be fitted into a spline hole of the drive shaft are engraved on the outer periphery, and a center hole concentric with the main shaft in the center of the frame body rotates only. a spline shaft that is rotatably supported; an intermediate shaft that is fixed to a center hole of the drive shaft and is inserted through the center hole of the spline shaft so as to be movable in the axial direction, and has a lower end slightly protruding from a lower end surface of the spline shaft; a high-speed spindle that is rotatably supported in a center hole concentric with the drive shaft at the lower part of the frame body, has a second gear on the upper outer periphery, and has a tapered hole for mounting a tool holder; A retractable pin that is inserted so as to be movable in the axial direction by the axial movement of the intermediate shaft, has a pull stud gripping collet at the bottom thereof, and is constantly biased to retract by a plurality of disc springs; an intermediate gear shaft having a gear rotatably supported in a frame and meshing with the first and second gears and having a gear ratio of an integer so that the drive shaft and the high-speed main shaft are in the same phase when the main shaft is stopped at a fixed position; A high-speed spindle attachment capable of automatic tool exchange, characterized in that the tool can be automatically exchanged on the high-speed spindle by operating a tool-lifting mechanism on the spindle side.