CPC F16G 1/28 (2013.01) [D02G 3/16 (2013.01); D02G 3/26 (2013.01); D02G 3/447 (2013.01); F16G 1/10 (2013.01); F16G 1/16 (2013.01); F16H 7/023 (2013.01); D10B 2101/12 (2013.01); D10B 2505/02 (2013.01)] | 5 Claims |
1. A transmission system using a toothed belt, the transmission system comprising:
a toothed belt including a belt body made of elastomer and a core wire made of carbon fiber and provided so as to be embedded in the belt body and form a helix having a pitch in a belt width direction; and
a toothed pulley meshed with the toothed belt,
wherein
the belt body includes a flat band portion having a horizontally long rectangular cross section and a plurality of tooth portions integrally provided on an inner peripheral side of the flat band portion,
the core wire is a single twisted yarn formed by twisting a filament bundle of carbon fiber forming the core wire in one direction,
a number of twists of the core wire of the single twisted yarn per length of 10 cm is four times/10 cm or more and twelve times/10 cm or less, and
a belt tension T0.2 per belt width of 1 mm when a belt elongation rate is 0.2% is 70 N/mm or more, an amount of backlash between the toothed belt and a toothed pulley is 0.10 mm or more and less than 0.65 mm, a hardness of the belt body is 89° or more in JIS K 6253 Durometer Type A, and a surface dynamic friction coefficient is 1.5 or less.
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