| 摘要 |
PROBLEM TO BE SOLVED: To provide a spindle braking structure for a direct drive torque motor device capable of quickly stopping and accurately controlling a spindle and maintaining a powerful fastening force on a work or a tool even when the spindle is braked. SOLUTION: This spindle braking structure comprises a body, a direct drive torque motor installed in the body, the spindle 20 installed in the direct drive torque motor, and a braking device. The braking device is assembled between the body and the spindle. A braking oil chamber 332 is formed in the braking device. A braking deformable wall 333 made thinner depending on the spindle is formed in the braking oil chamber. The braking deformable wall is deformed by a high pressure in the braking oil chamber. The swelled braking deformation wall presses against the spindle for braking the spindle. COPYRIGHT: (C)2009,JPO&INPIT
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