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Characteristics of harmonic reducers that make them irreplaceable
Release time:
2025-03-24
By ensuring the motor operates at an appropriate speed and precisely reducing its rotational speed to match the equipment’s required speed, it is also possible to enhance the mechanical system’s rigidity while delivering greater torque—achievements that conventional gear reducers can attain. So why must a harmonic drive be chosen? What unique characteristics does a harmonic reducer possess that make it irreplaceable?
By ensuring the motor operates at an appropriate speed and precisely reducing its rotational speed to match the equipment’s required rate, it is also possible to enhance the mechanical system’s rigidity while delivering greater torque—achievements that conventional gear reducers cannot attain. So why choose a harmonic drive? What unique characteristics make harmonic drives irreplaceable? Today, a leading harmonic‑drive manufacturer will highlight these indispensable features. Let’s take a look: according to the manufacturer, during operation, the flexspline teeth undergo uniform radial motion; even at high input speeds, the relative sliding velocity of the teeth remains extremely low—only about one percent of that in conventional involute gear drives. As a result, tooth wear is minimal, and efficiency is exceptionally high, reaching 70% to 95%.
Because both sides of the gear engage during both the meshing and disengaging phases, there is no impact, resulting in smooth motion. Leveraging the flexibility of the flexspline, harmonic drives can transmit motion into enclosed spaces—something other types of transmissions cannot match. The primary function of a harmonic reducer is to reduce speed and increase torque while ensuring reliable execution of process tasks; when repeating identical motions, it maintains both positioning accuracy and repeatability. Compared with conventional reducers, at the same output torque, a harmonic reducer can reduce its volume by two-thirds and its weight by half. It consists of only three basic components—the wave generator, the flexspline, and the circular spline—and features coaxial input and output shafts, making its structure simple and installation convenient.
The speed ratio of a single-stage harmonic gear drive ranges from 69 to 330, and in certain applications it can reach as high as 990. Multi‑stage drives can achieve ratios exceeding 31,000. During operation, harmonic gear drives feature a large number of simultaneously meshing teeth; in a two‑wave configuration, the number of engaged teeth can exceed 30% of the total. Moreover, the flexspline is made from high‑strength materials, and tooth contact occurs over an area rather than at a point. The abundance of simultaneous engagements in harmonic gearing averages out errors, with multiple teeth compensating for deviations, resulting in high transmission accuracy. According to manufacturers of harmonic reducers, under the same gear‑accuracy class, the transmission error is only about one‑quarter that of conventional cylindrical gears. Additionally, by making minute adjustments to the radius of the wave generator, the flexspline’s deformation can be increased, yielding extremely small backlash—approaching zero backlash engagement. Consequently, harmonic gear reducers exhibit very low backslash and are well suited for reverse‑rotation applications.
Contact: Gong Zhihao
Tel: +86-13812278994
Email: zgong@jxzndriver.com
Address: Building B, No. 2 Liye Road, Binhu District, Wuxi City, Jiangsu Province
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