Introduction to Harmonic Reducers

A harmonic reducer (also known as a harmonic drive) is a gear transmission mechanism comprising a rigid gear, a flexible gear, and a wave generator. It achieves power transmission by utilizing the wave generator to induce elastic deformation in the flexible gear. Characterized by high transmission precision, a large single-stage reduction ratio, and a compact size, it is widely applied in fields such as industrial robotics, collaborative robotics, humanoid robotics, aerospace, and machine tools.

Its core performance attributes include high transmission efficiency and a specific service life. As a critical component within robotic rotary actuators, it plays a pivotal role in applications such as humanoid robotics. In the global market, Harmonic Drive (Harmonica) holds a dominant position, resulting in a high degree of market concentration. Domestic manufacturers have made strides in harmonic reducer technology-for instance, by developing products that incorporate "P-type tooth" structures and third-harmonic technologies. Some manufacturers are utilizing novel materials or innovative designs to achieve product weight reduction or extend bearing service life. Domestically produced harmonic reducers encompass a diverse range of models, including cup-type, hat-type, and flat-type configurations. Furthermore, domestic manufacturers continue to invest heavily in the R&D of harmonic reducers and related modules, as well as in expanding their production capacity.