The Need

Speed reducers are mechanical devices utilized in heavy machinery and robotics for controlled manipulation of servo motor speeds. Harmonic drives and cycloidal drives are examples of speed reducers designed to maintain high gear ratios while simultaneously preventing backlash from occurring due to misaligned gear teeth. However, harmonic drives have limited gear reduction capabilities due to their restricted power input levels and higher ratios incur the risk of fatiguing the flex spline material, which effectively reduces its lifespan. Harmonic drives are also very sensitive to operating environment and not capable of high temperature or stress operations. Cycloidal drives are also not compatible in applications where backdrivability, or the mechanism where input and output shafts can rotate in the reverse motion, is needed for safe operation of robotic arms to prevent accidents.

The Technology

The Circular Wave Drive features a novel design comprising an enclosed housing with a chamber, a ring-shaped wheel within the chamber, and a wave generator inside the wheel. The wave generator drives the wheel, which transfers motion to an output element. This design minimizes material fatigue and reduces the number of moving parts, enhancing durability. The innovative friction elements within the system ensure smooth operation and long-lasting performance, addressing the limitations of traditional drives by providing a more straightforward and robust solution.

Commercial Applications

• Robotics: Enhanced precision and durability in robotic joints and actuators.
• Automotive: Improved efficiency in electric vehicle powertrains.
• Manufacturing: Reliable motion control in automated machinery.
• Aerospace: Lightweight and efficient power transmission for aircraft systems.
• Medical Devices: High-precision movement in surgical robots and diagnostic equipment.

Benefits/Advantages

• Increased Durability: Reduces material fatigue and wear, extending the lifespan of the device.
• Simplified Design: Fewer moving parts decrease the likelihood of mechanical failure.
• High Efficiency: Smooth operation with minimal friction loss.
• Versatile: Applicable in a wide range of industries requiring precise motion control.
• Cost-Effective: Lower maintenance and replacement costs due to improved durability.

Patent Protection

• United States Patent No. 9,494,224
• United States Patent No. 9,677,657
• United States Patent No. 10,247,288