US 11,719,309 B2
Toothed belt
Kazuyuki Tsubakino, Kobe (JP)
Assigned to BANDO CHEMICAL INDUSTRIES, LTD., Kobe (JP)
Filed by BANDO CHEMICAL INDUSTRIES, LTD., Kobe (JP)
Filed on Dec. 28, 2022, as Appl. No. 18/90,338.
Application 18/090,338 is a continuation of application No. PCT/JP2021/024922, filed on Jul. 1, 2021.
Claims priority of application No. 2020-115532 (JP), filed on Jul. 3, 2020.
Prior Publication US 2023/0141466 A1, May 11, 2023
Int. Cl. F16G 1/28 (2006.01); F16H 7/02 (2006.01); F16G 1/10 (2006.01); F16G 1/16 (2006.01); D02G 3/26 (2006.01); D02G 3/44 (2006.01); D02G 3/16 (2006.01)
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
OG exemplary drawing
 
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.