| 摘要 |
<p>A tool change apparatus has a chuck (512) mounted to the shaft (504) of a spindle (500). The chuck (512) has a cylindrical cavity (514) adjacent which hydraulic expansion chambers (not shown) are located. Pressure within the expansion chambers is regulated to cause deformation of the wall of the cavity (514) in order to grip a tool (518), by means of a detent member (524) engageable with a rotatable regulating valve (520) on the spindle shaft during rotation of the spindle.</p> |
