US 4,784,543 AGranted

Quick change tool holder

AssigneeRogers Tool Works, Inc.

InventorsJames L. Mitchell, Robert W. Britzke

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Abstract

A quick change tool holder having a cutting head on which a cutting member is attached for attachment to a shank. A lockpin/locknut arrangement provides for quick and safe removal of the cutting head from the shank. The lockpin has radial projections that rotate in response to manual rotation of the lockpin in and out of recesses contained in the opening of the locknut. The lockpin is secured within a bore in the cutting head and extends out of that bore into a bore in the shank in which bore the locknut is secured. A spring and plunger combination is located in the bore of the shank in order to urge the cutting head away from the shank when the radial projections are not within the recesses of the locknut. The shank and the cutting head have corresponding mating teeth in order to prevent rotation of the cutting head relative to the shank when the cutting head and shank are attached.

Claims26

Dependent claims

Apparatus for releasably connecting a cutting tool head to a shank, comprising:

a cutting tool head having a front end, a rear end and a bore therethrough, said rear end having an interface surface;
face;
a shank having a front end, a rear end and a bore therein, said forward end having an interface surface adapted to engage said interface surface of said cutting tool head so as to hold said cutting tool head against rotation relative to said shank;
lockpin means disposed for rotation within the bore of said cutting tool head, said lockpin means extending longitudinally out of said cutting tool head and into the bore of said shank, said lockpin means having a front end and a rear end, said front end being secured to said cutting tool head;
and
locknut means having a front end and a rear end and being adapted to fit moveably and securely within said bore of said shank, said locknut means having an aperture therein disposed to receive the rear end of said lockpin means, said locknut means having a locking and unlocking means for locking said lockpin means in said locknut means in response to rotation of said lockpin means in a first locking direction and for unlocking said lockpin means from locknut means in response to rotation of said lockpin means in a second and opposite unlocking direction.

3 more elements

A tool with a quick change cutting tool head mechanism, comprising:

shank means mounted to said tool and having a bore therein;
cutting head means having a bore therein and adapted to be removably attached to said shank means;
pin means having front and rear ends, said front end being connected to and within said bore in said cutting head means and said rear end having at least one radial projection thereon;
locknut means threaded within said shank means having at least one recess disposed to receive therein said at least one radial projection on said pin means in response to rotation of said pin means in a locking direction, said recess being disposed so that further rotation of said pin means once said at least one radial projection is lockingly received within said at least one recess tightens said locknut means within said shank means;
and
means disposed in said shank means for locking and unlocking said pin means within said locknut means in response to rotation of said pin means.

3 more elements

Dependencies are inferred from the claim text.