| 摘要 |
PURPOSE: A bicycle transmission assembly is provided to reduce product unit cost and enable mass production by manufacturing driving and driven assembly with high strength synthetic resin. CONSTITUTION: A bicycle transmission assembly comprises a first housing, a second housing, a first drive assembly(A1), a second drive assembly(A2), a driven assembly(B), and a pedal crank axis(5). The first and second housings have an internal space. The first and the second drive assembly are inserted into the first and the second housing, respectively and comprise multiple driving gears(2). The driven assembly is formed between the first and second drive assemblies and comprises a driven shaft(3). The driven shaft comprises multiple driven gears(4). The pedal crank axis passes through the first and the second housing and the center of the first and the second housings. |
