Chuck jaw and mounting therefor
AssigneeN. A. Woodworth Company
InventorKenneth O. Cross
Life of this patent
Estimating the term…
Abstract
A top jaw adapted for mounting on and attachment to the master jaw of a conventional work holding chuck and simultaneously during attachment thereof to be located radially against a fixed stop by a double T-nut of unique configuration, the latter being movable by an actuator screw in T-slots provided in the jaws, one portion of the T-nut and the complementary T-slot in the top jaw in which it is mounted being inclined with respect to and sloping toward the interface between the top and master jaws so that tightening of the T-nut by the actuator screw forces the top jaw radially against the stop and simultaneously axially against the mating surface of the master jaw, the taper angle of T-nut and the lead angle of the screw threads mutually cooperating to lock the top jaw on the master jaw in use.
Claims18
In a rotatable work holding chuck of the type having a plurality of radially movable master jaws, and top jaws mounted on said master jaws, said top jaws and said master jaws having mutually engageable, radially extending, mating surfaces permitting adjustment of said top jaws on said master jaws radially with respect to the rotational axis of the chuck, the improvement comprising
- stop means on said master jaws engageable with said top jaws for limiting radial movement of the latter in one direction;
- means defining axially forwardly first shoulder means on said top jaws;
- means defining axially rearwardly facing second shoulder means on said master jaws, both of said shoulder means extending essentially radially with respect to the rotational axis of said chuck and at least said first shoulder means being inclined relative to said rotational axis and sloping axially rearwardly away from said stop means;
- actuated means interconnecting said top jaws and said master jaws having pressure surfaces overlaying and engageable with both of said first and said second shoulder means, said actuated means being movable radially to bring said pressure surfaces into and out of engagement with said first shoulder means and operative to limit axial movement of said top jaws away from said master jaws;
- and actuator means coactive with said actuated means to move the latter positively radially in at least one direction to engage said pressure surfaces forcefully with said inclined first shoulder means, whereby said actuated means is operative in use to position said top jaws radially on said chuck by exerting a radial component of force against said first shoulder means in a direction to shift and hold said top jaws solidly against said stop means and simultaneously is operative to hold said top jaws securely on said master jaws by exerting an axial component of force axially against said first shoulder means in a direction to hold said mating surfaces solidly together.
The combination of a top jaw adapted for mounting on a chuck master jaw and having a T-slot therein;
- and a double T-nut having a first T-portion for longitudinal sliding movement in said T-slot and a second T-portion extending from said top jaw for acceptance in a T-slot in said master jaw;
- said top jaw T-slot and the first T-portion of said T-nut being inclined and disposed in converging relation with respect to said second T-portion of said T-nut;
- and screw means extending longitudinally into and in threaded engagement with the second T-portion of said T-nut for driving the latter in said T-slots.
A jaw mounting for rotatable work holding chucks of the type having a plurality of master jaws each provided with a T-slot therein, said mounting comprising
- a plurality of top jaws one for each of said master jaws each adapted to be mounted on a respective master jaw and having T-slots communicating with said first mentioned T-slots and extending in acute angular relation with respect thereto,
- double T-nuts each having head portions adapted to be slidably received in and complementing said first and second mentioned T-slots, respectively, and coactive therewith to hold mating surfaces of said jaws solidly together;
- and
- actuator means for slidably driving said T-nuts in said T-slots.
Dependencies are inferred from the claim text.