Patent ID: 8602899
Filing Date: 2013-12-10
Classification: B25B,F16D

Abstract:
1. A torque-limiting coupling, comprising: a main body, having a first end and a second end, a receiving cavity being formed at the first end; a torque-limiting assembly, disposed in the receiving cavity, including an elastic element, a propping element, a pressing element, a plurality of beads, and an adjusting element, the elastic element being disposed between a bottom of the propping element and a bottom of the receiving cavity, the propping element forming a plurality of first notches, the pressing element forming a plurality of second notches, the beads being located between the first notches and the second notches, a top of the pressing element has a driving portion, the adjusting element being movably disposed above the pressing element, the adjusting element being adapted for adjusting amount of compression of the elastic element, the adjusting element being sleeved onto the driving portion; wherein the propping element includes an axle, an abutting piece, and a bead plate, the abutting piece is movably sleeved onto the axle, the elastic element is sleeved onto the axle and is located between a bottom of the abutting piece and the bottom of the receiving cavity, the bead plate is disposed on the axle above the abutting piece, the bead plate forms the first notches; a limiting mechanism, being adapted for restricting the torque-limiting assembly in the receiving cavity to prevent the torque-limiting assembly from being disassociated from the main body; wherein the receiving cavity has an inner wall forming a toothed portion, a top of the adjusting portion axially forms a protrusion, the driving portion is inserted into the protrusion, the protrusion annularly forms a positioning groove on an external surface, the limiting mechanism includes a limiting piece and a clipping ring, the limiting piece forms an aperture, the protrusion is inserted through the aperture, the aperture has a non-circular shape, the protrusion has a contour corresponding to the shape of the aperture, an outer surface of the limiting piece forms an engaging portion, the engaging portion is engaged with the toothed portion of the receiving cavity, the clipping ring clamps in the positioning groove.