Introduction ofharmonic drive

Harmonic drive uses the controlled elastic deformation of the flexible element to transmit motion and power. It includes three basic components: the wave generator, flexible wheel and rigid wheel. The three components can be arbitrarily fixed one, another one as active, and the last one as driven to get reduction or growth transmission with fixed gear ration. Also it can be in form of two inputs and one output to get differential transmission (its principle is shown).

When the rigid wheel is fixed, the wave generator is active and the flexible wheel is driven, the elliptical cam deforms flexible wheel which teeth at the both end of long axis are fully engaged with rigid wheel while at the both end of minor axis the teeth are just completely disengaged. In the range of long axis and short axis of the wave generator, the teeth of flexible wheel and rigid wheel are in semi-engage state, called engaging-in while the others are in semi-detached state, called engaging-out. Due to the continuous rotation of the wave generator, these four cases change in turn and have been circulating constantly. Since the teeth of the flexible wheel are two less than the number of rigid wheel, when the wave generator rotation a week, flexible wheel turned in the opposite direction of the angle of the two teeth. Then it achieves a large reduction ratio.

Product Feature

Harmonic Drive is a multi-tooth engage drive with a wide range of gear ratio and it also has high precision, small backlash, small size, light weight, high transmission efficiency, smooth transmission, low noise, and it can be able to transmit motion to the enclosed space or other advantages.

(1) High transmission accuracy: Multiple teeth are engaging in two 180 degrees symmetrical position, so the gear pitch error and cumulative pitch error on rotational accuracy are more average, get a high position accuracy and rotation precision.

(2) Large transmission ratio: transmission ratio of single-stage harmonic drive is up to 30~500, and the structure is simple for that the three basic components are in one axis.

(3) Small size and light weight: Compared to ordinary planetary transmission, it can significantly reduce the size and weight to achieve miniaturization and lightweight goal.

(4) High transmission efficiency, smooth transmission, no impact, lower noise.

Applications

Since the harmonic drive has many advantages, nowadays it is widely used in aviation, aerospace, industrial robots, defense weapons and equipment, medical equipment, instrumentation, textile machinery, printing and packaging machinery, food processing machinery and many other fields.

Guide for selection

First determine the output torque according to the load condition and then select the gear ratio and the size of the machine. Then determine the transmission ratio and performance specifically. To order products, contact with Chongqing Benteng Technology Co., Ltd please.