Why is the technology referred to as the “gearless gearbox?
The traction drive is a non-gear reduction
technology that minimizes vibration and noise. The negligible transmission error makes it the smoothest and most quiet method to mechanical adjust speed and torque. The following a brief explanation.
- The traction drive assembly consists of two smooth rollers held in fixed position with mechanical properties that include high hardness
- (Fn) Power is transmitted from the driven roller to the passive roller through viscous film
- When under pressure, this oil film will have a higher friction coefficient
- The speed differential between the rollers creates a tangential force (traction force, Ft) that shears the oil film
- The reduction ratio is determined by diameter of inner ring that contains the roller assembly and the number of planetary rollers, among other minor factors
- When the normal force (Fn) is deficient slippage can occur; we can control through close loop feedback