| 摘要 |
<p>An amplifier unit for AC spindles includes amplifiers inserted between the AC motors for driving the spindles of a machine tool and the power source and is accommodated in a housing (10). Unit fixing seats consisting of a flat region (12) and a boat-shaped region (14) are provided at predetermined positions on the ceiling of the housing (10), the unit fixing seats being abutted to mounting portions of a plurality of electric circuit units (B, D, G, H) that form the amplifiers, and thin vertical plate-like ribs (22) are provided surrounding said predetermined positions so that the mounting portions (18) of the electric circuit units (B, D, G, H) and fixing seats (12, 14) are abutted together, said ribs (22) having tilted surfaces (24) that work to place the electric circuit units (B, D, G, H) in position.</p> |
