Method of side transmission through unidirectional clutch and the clutch for such purpose

An outside-brake clutch for side transmission, comprising an outside-brake clutch body, at least one braking element, at least one elastic element in the same number as that of said braking element, and a stop ring;

• said outside-brake clutch body being provided along an external circumferential surface with at least a one-way braking recess, at a first end with a side transmission gear, and at a second end opposite to the first end with an annular groove that immediately adjacent to an open end of said at least one one-way braking recess facing toward the second end of said clutch body;
• said clutch body also defining a central shaft hole, and a circumferential wall of said central shaft hole providing a bearing surface;
• said at least one braking element being a rotor having a predetermined circumferential surface;
• said at least one elastic element being made of any suitable elastic material;
• and said stop ring being elastically deformable and having suitable ability of elastic restoring force;
• and
• each said one-way braking recess having one said braking element and one said elastic element disposed therein, and said stop ring being disposed in said annular groove provided at the second end of said clutch body to stop said braking elements and said elastic elements from moving out of said one-way braking recesses via the open end thereof.

An inside-brake clutch for side transmission, comprising an inside-brake clutch body, at least one braking element, at least one elastic element in the same number as that of said braking element, and a stop ring;

• said inside-brake clutch body defining a central shaft hole and being provided in said central shaft hole at predetermined positions with at least a one-way braking recess, at a first end of said clutch body with a side transmission gear, at a second end opposite to the first end with an annular groove that is immediately adjacent to an open end of said at least one one-way braking recess facing toward the second end of said clutch body, and at a predetermined position in said central shaft hole with a bearing surface;
• said at least one braking element being a rotor having a predetermined circumferential surface;
• said at least one elastic element being made of any suitable elastic material;
• and said stop ring being elastically deformable and having suitable ability of elastic restoring force;
• and
• each said one-way braking recess having one said braking element and one said elastic element disposed therein, and said stop ring being disposed in said annular groove provided at the second end of said clutch body to stop said braking elements and said elastic elements from moving out of said one-way braking recesses via the open end thereof.