Device for securing a tool to a spindle
View Patent ↗A tool securing device capable of clamping a tool to a machine spindle as well as assisting in the removal of a tool from a machine spindle, all in a tool-less manner. The tool securing device includes distal means to be releasably gripped by a machine draw bar as well as means to releasably engage a tool.
1. An apparatus for securing a tool to a spindle of a machine in a tool-less manner, said apparatus comprising:
an axially-extending body portion having a proximal flange portion and a distal knob portion, said body portion including an axially-extending internal bore; a plurality of radially-extending openings spaced about said body portion and being axially located on said body portion between said flange portion and said distal knob portion;
a ball residing in and movable within each of said openings between a radially outward position and an inward position;
an internal plunger residing in and movable within said internal bore between an advanced position and a retracted position;
wherein said advanced position provides a first diameter of said plunger adjacent to and in contact with said balls whereby said balls are urged to said radially outward position, and wherein said retracted position provides a second diameter of said plunger adjacent said balls whereby said balls are movable to said inward position;
wherein said plunger further includes a first end and a second end with a knob for effecting movement of said plunger being located at said first end and axially outward of said flange and said first and second diameters being located near to said second end.
2. The apparatus of claim 1 wherein said distal knob portion includes a radial contact surface.
3. The apparatus of claim 1 wherein said plunger further includes a seal located between said first diameter and said knob.
4. The apparatus of claim 1 wherein an underside of said flange portion seats against a tool when said tool is secured to said spindle.
5. The apparatus of claim 1 wherein said balls are retained in said body portion by a sleeve located on said body portion.
6. The apparatus of claim 1 wherein said openings are spaced equidistantly about said body portion.
7. The apparatus of claim 1 wherein said second diameter of said plunger creates a cavity-like region in said plunger wherein said balls can at least partially reside when said balls are in said inward position.
8. The apparatus of claim 1 wherein said knob for effecting movement is a push/pull knob.