Quick coupling unit for bar loader clamps

A quick coupling unit for bar loader clamps, the unit comprising:

• an end shaft configured to be accommodated rotatably within a corresponding seat of a tubular body that is integral with a bar pusher of said loader and an element for stable coupling to a terminal stem of a respective clamp, wherein said element for stable coupling to the terminal stem of the respective clamp comprises a sleeve provided with a recess having shape and dimensions that are complementary to shape and dimensions of an insert configured to be accommodated in said recess;
• an internal face of said insert having a shape which is complementary to that of a recess that is present on the terminal stem of the respective clamp;
• and
• a locking ring surmounting said sleeve and said insert, said ring having a variable inside diameter, rotations of said ring with respect to said sleeve being defined between a first configuration of alignment of a region having a minimum inside diameter with said insert, with consequent clamping of said insert within said recess and locking of said stem as a consequence of the insertion of the internal face of said insert within said recess that is present on the terminal stem of the respective clamp, and a second configuration of alignment of a region having a maximum inside diameter with said insert and consequent freedom of radial spacing thereof from said recess of the sleeve, with consequent free exit of said stem provided with the recess from said sleeve.

A lathe bar loader comprising:

• at least one bar pusher coupled to a rotating assembly which supports a locking clamp for a bar, said rotating assembly comprising a coupling unit provided with an end shaft that can be accommodated rotatably within a corresponding seat of a tubular body that is integral with the bar pusher of said loader and an element for stable coupling to a terminal stem of the respective locking clamp, wherein said element for stable coupling to the terminal front of the respective clamp comprises a sleeve provided with a recess whose shape and dimensions are complementary to those of an insert that can be accommodated in said recess;
• an internal face of said insert has a shape which is complementary to that of a recess that is present on the terminal stem of the respective clamp;
• and
• a locking ring surmounts said sleeve and said insert, said ring having a variable inside diameter, the rotations of said ring with respect to said sleeve being defined between a first configuration of alignment of a region having a minimum inside diameter with said insert, with consequent clamping of said insert within said recess of the sleeve and locking of said stem following the insertion of the internal face of said insert within said recess that is present on the terminal stem of the respective clamp, and a second configuration of alignment of a region with maximum inside diameter with said insert and consequent freedom of radial spacing thereof from said recess, with consequent free exit of said stem provided with the recess from said sleeve.