Shuanghuan Drivetrain - 双环传动

Zhejiang Shuanghuan (Double Ring) Transmission Machinery Co., Ltd., trading as Shuanghuan Drivetrain, is a Chinese gear and precision transmission component manufacturer founded in 1980 by Ye Shanqun, who started the business with roughly 3,000 yuan in capital and five machine tools producing motorcycle gears. The company has since grown into one of China's leading gear product manufacturers, listed on the Shenzhen Stock Exchange since September 2010 under stock code 002472. Headquartered in Yuhang District, Hangzhou, Zhejiang Province, the company reports more than 8,000 employees, more than 13 subsidiaries worldwide, and over 490 patents and software copyrights. Its core product portfolio covers gears and gear assemblies for traditional internal-combustion and new-energy vehicle transmissions, hybrid and electric drive systems, rail transit gearboxes, and non-road and construction machinery reduction and transmission devices. Over the past decade the company has expanded into precision reduction gears for industrial robotics, specifically RV (rotary vector) reducers used as joint actuation components in industrial robot arms — a product line it describes as having moved from R&D into industrialized production, and through which it positions itself as a leading domestic Chinese brand in robotics components. The company also supplies gear components for wind power generation equipment and general automation machinery. Shuanghuan's customer base includes major global industrial names such as ZF, Cummins, Caterpillar, SAIC, and FAW, with the company stating that more than 60% of its sales go to Fortune 500 companies. It operates a National Engineering Technology Research Center for Gears and has been recognized as a Manufacturing Champion Demonstration Enterprise by China's Ministry of Industry and Information Technology, in addition to holding a Provincial Future Factory designation and an AAAAA Standard Enterprise rating from Zhejiang province. As of August 2026, industry reporting indicated Shuanghuan was further diversifying into robotics component supply — including actuation and reducer components applicable to humanoid robots — amid intensifying price competition in the robotics supply chain following price cuts by humanoid robot maker Unitree, a dynamic that is pushing established industrial gear suppliers like Shuanghuan to compete more directly for robotics OEM component contracts alongside traditional automotive and industrial transmission customers.