The harmonic drive reducer is a high-performance reducer featuring a compact structure, large transmission ratio, light weight, minimal backlash, and high transmission accuracy. It is widely used in high-precision fields such as industrial robotics, medical equipment, aerospace, and intelligent manufacturing. As a key core component of industrial robots, its performance directly affects motion control accuracy, operational stability, and energy efficiency. The top-hat type harmonic drive reducer is developed based on the conventional harmonic drive reducer, with enhanced rigidity and extended service life.