Patent ID: 8850917
Filing Date: 2014-10-07
Classification: B23Q,Y10T

Abstract:
1. A spindle drive, comprising: a body that is disposed at a side of a machine tool; a spindle that is disposed at the body, with a ring gear disposed thereunder; a gear box that is disposed at a side of the body; a plurality of driven shafts that is disposed at the gear box and engaged with the ring gear; an idle shaft that is disposed at the gear box and engaged with a plurality of driven gears at a side; a high-speed driving shaft that is disposed at the gear box and drives the idle shaft while changing the speed by a driving force of a spindle motor; a low-speed driving gear that is disposed at the gear box, engaged with the driven shafts, and pressed by a pressing unit such that backlash is removed; a decelerator that is disposed at the low-speed driving gear and driven by a servomotor to drive the low-speed driving gear; a clutch unit that is disposed between the servomotor and the low-speed driving gear and controls power transmission of the servomotor; a first transmission driving gear that is disposed at the upper portion of the driving shaft; a second transmission driving gear that is disposed at the lower portion of the driving shaft by a spline and linearly moves; and a third transmission driving gear that is disposed at the driving shaft by a spline, linearly moves, and is engaged with the first transmission driving gear.