Work-holding chuck with quick-release jaws
View Patent ↗A system, in certain embodiments, includes a wedge-lock coupling configured to connect a jaw to an actuator arm of a chuck. The wedge-lock coupling includes a wedge portion having a path of travel between a release position and a lock position, and a locking direction along the path of travel gradually wedges the wedge portion between the actuator arm and the jaw.
1. A system, comprising:
a drive;
a chuck rotatable by the drive, wherein the chuck comprises:
an actuator arm comprising a first plurality of teeth;
a jaw; and
a wedge-lock coupling between the actuator arm and the jaw, wherein the wedge-lock coupling comprises:
a wedge portion having a path of travel between a release position and a lock position, wherein a locking direction along the path of travel gradually wedges the wedge portion between the actuator arm and the jaw;
an axis along the path of travel, wherein the wedge portion comprises a locking surface tapered relative to the axis; and
a second plurality of teeth disposed on the locking surface, wherein the first and second plurality of teeth engage one another in the lock position.
2. The system of claim 1 , wherein the first plurality of teeth is disposed at a first position on the actuator arm, the actuator arm comprises a third plurality of teeth disposed at a second position on the actuator arm, the wedge-lock coupling mutually exclusively couples the second plurality of teeth to either the first plurality of teeth or the third plurality of teeth, and the first and second positions are on diametrically opposite sides of the actuator arm.
3. The system of claim 1 , wherein the path of travel is oriented in a plane perpendicular to a second axis of the actuator arm, and the path of travel in the locking direction converges toward a locking interface at a convergence angle of approximately 5 to 45 degrees.
4. The system of claim 1 , wherein the wedge-lock coupling is disposed in a bore in the jaw, the wedge-lock coupling is movable along the path of travel through the bore, and the wedge portion engages the actuator arm in the lock position.
5. The system of claim 1 , wherein the second plurality of teeth is elongated along the locking direction.
6. The system of claim 1 , wherein the wedge-lock coupling comprises a tool portion coupled to the wedge portion, and the tool portion is rotatable to cause movement of the wedge portion along the path of travel.
7. The system of claim 6 , wherein the tool portion comprises a first threaded portion coupled to a second threaded portion of the wedge portion, and the wedge-lock coupling comprises a guide configured to enable rotation and block axial movement of the tool portion.
8. The system of claim 7 , wherein the guide comprises a wheel having an annular groove coaxial with the tool portion, the wheel is coupled to the tool portion, the guide comprises a post coupled to the jaw, and the post extends tangent to the annular groove.
9. The system of claim 6 , wherein the tool portion comprises a shaft having a tool head and a first threaded portion disposed on opposite ends of the shaft, the shaft extends through an interior bore in the wedge portion, and the first threaded portion is coupled to a second threaded portion.
10. The system of claim 9 , wherein the wedge portion comprises a guide configured to block rotation and enable axial movement of the wedge portion along the path of travel.