Basic knowledge about planetary reducers

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A reducer generally achieves deceleration by using the teeth on the gear with fewer teeth on the input shaft of the motor, internal combustion engine, or other high-speed power source to mesh with the larger gear on the output shaft. A reducer is a transmission device used for low speeds and high torque; this is a basic fact that requires no further explanation. Ordinary reducers also employ several pairs of gears operating on the same principle to achieve the desired level of deceleration, and the ratio of the number of teeth between the large and small gears constitutes the transmission ratio. Stage: The number of sets of planetary gears. Since a single set of planetary gears is not sufficient to achieve high transmission ratios, 2 or 3 sets may be needed to meet the user’s requirements for higher transmission ratios. As the number of planetary gears increases, the length of 2-stage or 3-stage reducers increases as well, and their efficiency decreases. Backlash: With the output end fixed, the input end is rotated clockwise and counterclockwise; when a torque of ±2% of the rated torque is applied to the input end, there is a slight angular displacement at the input side of the reducer. This angular displacement is what is known as backlash. Its unit is \"minutes\", which is one sixtyth of a degree. It is also sometimes referred to as back play.