The transmission mechanism of a harmonic gear reducer mainly consists of three components: a wave generator, a flexible gear, and a rigid gear. The wave generator comprises a flexible bearing and a camera. The wave generator is typically mounted at the input end of the reducer, and the inner ring of the flexible bearing is connected to the camera. The flexible gear, part of a flexible elastomer, is usually mounted at the output end of the reducer. The rigid gear is the rigid ring component of the internal gearbox, typically having two more large teeth than the flexible gear, and is usually located on the reducer itself. What are the working principles and characteristics of a harmonic gear reducer?
1: Harmonic deceleration principle
As a speed reducer, harmonic reduction typically uses a wave generator as the active component, a rigid wheel clamping mechanism, and a flexible wheel output to achieve speed reduction. When the wave generator enters the flexible wheel, the flexible wheel becomes elliptical, and the long-axis flexible wheel teeth promptly insert into the rigid gearbox to complete the meshing state. At this point, the two gears are not in contact with their shafts and are in a suspended state. The process from engagement to disengagement is a process of participation or intervention. As the wave generator runs and rotates continuously, it forces the flexible wheel to continuously deform and recover, thus causing the two teeth to continuously engage, engage, and disengage, generating continuous interlaced tooth motion, thereby realizing the motion of the active wave generator.
Harmonic drive
2: Coordinated driving characteristics
Its first characteristic is its relatively high precision. Under multiple gearbox operating conditions, 180-degree meshing should occur in two symmetrical positions. Therefore, the impact of transmission gripping error on the rotational level is relatively average, which can achieve...
Secondly, the transmission ratio is very high. Generally, the transmission ratio of a single-stage harmonic gear transmission can reach 30-500, and the structure is relatively simple. The three components enable rapid operation.
Third, it has a relatively high load capacity. In the transmission process of a harmonic reducer, there is a network between the teeth and the surface, rather than point contact. Furthermore, the more teeth there are, the lower the force per unit area, and the higher the load capacity compared to other transmission coefficients. Fourth, it is small and lightweight. Miniaturization and mass production are easier to achieve than with traditional gearboxes. High precision also minimizes the impact of temperature fluctuations, resulting in high transmission efficiency and a relatively long service life.
