| 摘要 |
An improved chuck utilizing a self-contained hydraulic system integrated to the spindle rotor to radially flex a thin walled diaphragm so as to grip a collet and a tool therein. Pressure in the hydraulic system is controlled by means of a plunger which is forced to a position which compresses the hydraulic fluid by means of a spring. The plunger may be pushed against the action of the spring in order to decompress the fluid by means of a mechanical release which is removed from the plunger during the operation of the chuck. A built-in hydraulic amplification system achieves high clamping pressure with a small actuating force. Accordingly, only a small actuating force is also required to relieve the clamping pressure so that the chuck bearings are not overloaded while the tool is being released.
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