Tool spindle mechanism

Claim 2

In an axially adjustable tool locking mechanism, the combination of a spindle having a tapered socket, an adapter fixed to the spindle, a tool arbor to be received in said adapter, a draw stud secured to said tool arbor, a shoulder on said draw stud having a flat locking surface, an axially movable locking bar, a locking member carried on said locking bar having expansible fingers, said having flat surface portions near one end engageable with the flat locking surface of said draw stud and cam surfaces near the other end, an axially adjustable sleeve with cam surfaces threadedly secured within said spindle, said cam surfaces on said locking finers being engageable with the cam surface on said clamping sleeve, said locking member having means causing said fingers to contract upon rearward axial movement of said locking member, whereby said flat locking portion surface on said draw stud is engaged by the flat surface portions on said fingers and the cam portions on said fingers and said clamping sleeve engaged to clamp said tool holder in a locked position.

Claim 3

In an axially adjustable tool locking mechanism, the combination of a spindle, means for driving the spindle, a spindle sleeve within which said spindle is mounted, a spindle nose adapter secured to said spindle for receiving a tool holder, an axially movable locking bar, a locking member carried on said locking bar having expansible fingers, means on said fingers for locking a tool holder in said adapter, said fingers having cam surfaces at one end engageable with the cam surfaces on said adapter and cam surfaces neaR the other end, a locking sleeve having a cam surface, said cam surfaces near the other end of said fingers being engageable with the cam surface of said locking sleeve when said locking member is moved rearwardly by the locking bar to a locking position, a draw tube threadedly secured to said locking bar for axial movement thereof, an ejector collar secured to said locking bar having a cam surface thereon, whereby forward movement of said locking bar from the locking gpositin position will cause the cam surface of said ejector to act on said fingers to unseat them from the cam surface of said locking sleeve and allow said fingers to expand at said one end due to the engagement of the cam surfaces thereon with the cam surface on the adapter.

Claim 4

In an axially adjustable tool locking mechanism, the combination of a spindle, means for driving the spindle, a spindle sleeve within which said spindle is mounted, a spindle nose adapter secured to said spindle for receiving a tool holder, an axially movable locking bar, a locking member carried on said locking bar having expansible fingers, means on said fingers for locking a tool holder in said adapter, said fingers having cam surfaces at one end engageable with the cam surfaces on said adapter and cam surfaces neaR the other end, a locking sleeve having a cam surface, said cam surfaces near the other end of said fingers being engageable with the cam surface of said locking sleeve when said locking member is moved rearwardly by the locking bar to a locking position, a draw tube threadedly secured to said locking bar for axial movement thereof, an ejector collar secured to said locking bar having a cam surface thereon, whereby forward movement of said locking bar from the locking gpositin position will cause the cam surface of said ejector to act on said fingers to unseat them from the cam surface of said locking sleeve and allow said fingers to expand at said one end due to the engagement of the cam surfaces thereon with the cam surface on the adapter.