System for mounting a power transmission member to a shaft

A structural mounting assembly for mounting the disk portion of a gear on a rotational shaft comprising:

• a longitudinally extending, hollow, open-ended quill fixed to said disk portion to extend centrally and normally therethrough with the longitudinally extending quill member having a first portion extending a longer, preselected, longitudinal distance from one face of said disk portion than the extending longitudinal distance of said remaining second portion of said quill from the opposite face of said disk portion, said second portion having an annular internal groove positioned a preselected distance from the outer extremity thereof;
• a longitudinally extending, hollow, longitudinally split bushing sized and adapted to be inserted through the open end of said first portion of said hollow quill a preselected longitudinal distance from the opposite end of said remaining portion of said hollow, open-end quill, said opposite end of said bushing having a cap closing member integral therewith;
• said quill having a tapered inner bore extending longitudinally along said quill and converging inwardly toward the axis of rotation of said assembly from the open end of said quill toward the other end, and said hollow bushing having an outer tapered surface extending longitudinally along said bushing and converging inwardly also toward the axis of rotation of said structural assembly from the open end of said bushing toward said cap end to be received within said quill with the outer tapered surface of said bushing contacting in snug fit relation with the tapered inner bore surface of said quill;
• said inner bore of said hollow split bushing being sized and adapted to snugly grip one end of said rotational shaft extending therein;
• aligned key and slot fittings extending longitudinally along the inner bore of said hollow quill, through the wall of said bushing and along the outer peripheral surface of said rotational shaft;
• an adapter mounted at the open end of the remaining shorter portion of said quill including integral flange and plug portions sized so that said plug portion removably engages snugly with the internal bore opening of said hollow quill with the plug extremity adjacent said cap closing member of said bushing and the flange portion abutting said quill opening extremity of said remaining shorter portion of said quill, said plug portion having an annular peripheral groove extending therearound a preselected distance from said flange portion to be aligned with said annular groove in the inner bore of said shorter portion of said quill;
• a pair of substantially semi-circular ring members sized to be disposed in opposed relation in said annular peripheral groove of said plug member;
• said adapter including two spaced, longitudinally extending, internally threaded apertures therein to allow threaded passage therethrough of externally threaded holding screws with tapered, peripherally slotted extremities to engage with and hold said ring members in a first position during assembly and in a second position when in radial engagement with said aligned annular groove of said hollow quill;
• said adapter including a first pair of spaced, longitudinally extending, countersunk apertures therein to allow free passage of the shank portions of externally threaded headed fastening screws therethrough to respectively engage in male-female relation with a pair of equally spaced internally threaded apertures in said bushing cap to connect said bushing cap to restrain longitudinal movement between said bushing and said adapter;
• said adapter further including a second pair of spaced apertures equally sized in cross-section to said first pair of apertures and internally threaded to allow the shank portions of said threaded fastening screws to alternatively be threaded therethrough with the extremities thereof abutting said cap of said bushing to initiate relative releasing movement between said bushing and said quill in which said bushing is snugly engaged in assembly.