| 摘要 |
An improved spindle clamp is utilized to prevent axial movement of the spindle of a horizontal boring machine relative to a drive sleeve. The spindle clamp includes a generally cylindrical metallic clamp member which circumscribes the spindle. This clamp member has a thin metallic wall or membrane which is resiliently deflectable inwardly under the influence of fluid pressure to grip the spindle and retain it against axial movement relative to the drive sleeve. To operate the spindle clamp from a disengaged condition to an engaged condition, an intensifier piston is exposed to control fluid pressure to intensify or increase the fluid pressure applied against the membrane portion of the clamp member. The intensifier piston is disposed in a readily accessible cylinder block which is mounted on an outer end portion of the drive sleeve. To facilitate access to the clamp member, it is disposed radially inwardly of the cylinder block. The clamp member is provided with an axially extending rib having a greater flexural rigidity than the membrane portion of the clamp member. This rib spans a slot or key way in the spindle and prevents the membrane portion of the clamp member from being deflected into the slot.
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