How strain wave gear works | Strainwave gearbox supplier in delhi

Strain Wave Gear Principle: Harmonic Drive® strain wave gearing utilizes a unique operating principle which is based upon the elastic mechanics of metals. The greatest benefits are the zero-backlash characteristics and the weight and space savings compared to other gears because our gear mechanism consists of only three basic parts. They are the: Wave Generator, Flexspline and Circular Spline. Precimotion is one of the leading Strain Wave gear box suppliers in Delhi. Our offered products including Servo planetary gearbox, AGV are known for their utmost quality and reasonable cost. We are professionally managed with the rich experience in the field of Industrial automation & control systems. Gearbox supplier in delhi

This simple three element construction combined with the unique operating principle allows extremely high reduction ratio in a very compact and lightweight package. Neither the size nor weight of the gear varies with the reduction ratio. The high performance attributes of this gearing technology including zero backlash, high torque, compact size, excellent positional accuracy and repeatability are all a direct result of the unique operating principle.

The Components:

Wave generator: The Wave Generator is a specially designed thin raced ball bearing that is fitted onto an elliptical hub. This serves as a high efficiency torque converter and is used as the input of the gear and is connected to the motor shaft.

Flexspline: It is a thin cylindrical cup made from alloy steel with external teeth on the open end of the cup. The Flexspline is radially compliant but torsionally is very stiff. When the Wave Generator is inserted into the Flexspline the gear takes on its elliptical shape. It is used as the output and is connected to the output flange.

Circular Spline: The Circular Spline is a rigid ring with internal teeth. When the gear is assembled it engages the teeth of the Flexspline across the major axis of the Wave Generator ellipse. It has two more teeth than the Flexspline and is fixed to the gear housing.

Working: The Flexspline is slightly smaller in diameter and has two fewer teeth than the Circular Spline. The elliptical shape of the Wave Generator causes the teeth of the Flexspline to engage the Circular Spline at two opposite regions across the major axis of the ellipse. For every 180 degree clockwise rotation of the Wave Generator the Flexspline teeth are advanced counterclockwise by one tooth in relation to the Circular Spline. Each complete clockwise rotation of the Wave Generator results in the Flexspline moving counter-clockwise by two teeth from its original position relative to the Circular Spline. Because the gear teeth are always fully engaged in a region along the major axis, Harmonic Drive strain wave gearheads have Zero Backlash.

In the cup-type Harmonic Drive component sets used in the CSF-GH and CSG-GH gearheads, the bottom of the Flexspline (output side) is constrained to a circle while the top of the Flexspline is elliptically shaped. This causes the Flexspline gear teeth to flare outwards slightly. We call this the coning angle and it serves to preload the gear teeth of the Flexspline and Circular Spline. This preload ensures zero-backlash performance for the life of the gear.

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