Quick change right angle and offset drill head
AssigneeGrumman Aerospace Corporation
InventorsJohn M. Jenkins, Paul E. Kovach, Murray Berger
Life of this patent
Estimating the term…
Abstract
A quick change right angle drill head incorporates mechanism rotating components within the drill head housing thereby resulting in a more compact package which facilitates use in space-limited locations. A single push button release enlarges a chuck opening to receive a cutting tool. An internally located compression spring becomes operative when reverse thrust forces are exerted against a cutting tool. The design of the present invention may be constructed to either lock the cutting tool into the drill head chuck or release it, upon exertion of the reverse thrust forces.
Claims7
A tool drive for a cutting tool comprising:
- a chuck having radially movable detent balls therein;
- a collar outwardly surrounding the chuck and having an outer annular ramp edge;
- a shaft connected to the chuck and positioned within a housing;
- means for displacing the shaft and connected chuck thereby moving the detent balls over the ramp edge which results in radial outward displacement of the balls and consequent enlargement of the chuck opening for insertion and removal of the cutting tool;
- and
- means for normally positioning the displacing means in an inoperative position wherein the detent balls are removed from the ramp end causing the balls to engage mating detent receptacles in the cutting tool base which secure the cutting tool in place;
- wherein the shaft has a non-circular section and wherein the drive further includes:
- a gear coaxially mounted to the shaft;
- and
- further gear means for driving the coaxially mounted gear and consequently the chuck.
A right angle tool drive for a cutting tool having a base with detent receptacles formed therein, the drive comprising:
- a chuck having radially movable detent balls therein;
- a collar outwardly surrounding the chuck and having an outer annular ramp edge;
- a shaft having a parallelogram cross section and connected to the chuck for assuming a position inwardly of a housing;
- a push button having a transverse end exposed by an opening in the housing;
- means for mechanically limiting outward movement of the push button;
- a bearing fastened to an end of the shaft opposite
- the chuck and freely slidable within a housing enclosed bore of the button thereby permitting displacement of the shaft upon depression of the button resulting in movement of the detent balls over the ramp edge which results in radially outward displacement of the detent balls and consequent enlargement of the chuck opening for simple insertion and removal of the cutting tool;
- a gear coaxially mounted to the shaft;
- further gear means for driving the coaxially mounted gear and consequently the chuck;
- a compression spring concentrically positioned over the shaft;
- a first end of the spring abutting the coaxially mounted gear;
- a second end of the spring abutting an inward transverse end of the bearing thereby transmitting a force to the shaft which biases the chuck and hence the detent balls away from the ramp edge.
Dependencies are inferred from the claim text.