Lathe
AssigneeStar Micronics Co., Ltd.
InventorTakayuki Ishikawa
Life of this patent
Estimating the term…
Abstract
A lathe capable of shortening a spindle with respect to a spindle axis direction. A spindle provided with a chuck at the front end thereof is rotatably supported on a support by bearings. A chuck operating apparatus includes a tilt claw and a shifter. A built-in motor is disposed between the bearings to rotate the spindle. The claw is provide outside the spindle and between the bearings. The claw has a movable end whose distance from the spindle axis varies between a first posture to bring the chuck into the opened state and a second posture to bring the chuck into the closed state. The shifter is provided outside the claw and movable in the spindle axis direction to be brought in a first position to bring the claw into the first posture and in a second position to bring the claw into the second posture.
Claims4
A lathe comprising:
- a spindle rotatable on a spindle axis and provided with a chuck having a closed state to hold a workpiece and an opened state to release the workpiece, the chuck being provided at the front end of the spindle;
- a support which rotatably support the spindle by a front bearing and a rear bearing;
- a built-in motor disposed between the front bearing and the rear bearing to rotate the spindle;
- and
- a chuck operating apparatus which opens and closes the chuck, comprising:
- a tilt claw provided outside the spindle and having a movable end whose distance from the spindle axis varies between a first posture to bring the chuck into the opened state and a second posture to bring the chuck into the closed state, the claw being provided between the front bearing and the rear bearing;
- and
- a shifter provided outside the claw and movable in a direction of the spindle axis to be brought in a first position to bring the claw into the first posture and in a second position to bring the claw into the second posture.
Dependencies are inferred from the claim text.