Planetary Gearbox Ratio Calculation

Calculate gear ratio by dividing the number of teeth on the driven gear by the number of teeth on the driving gear.

Planetary gearbox ratio calculation. In this case the planet gears have 12 teeth the sun gear has 18 and the ring gear has 42 teeth. Note that in this case the planetary gear works like a stationary gearbox without moving rotational axes. A planetary gear can also be used as a so called direct drive. Spur gear in motion for example gear box is a type of gear train that is used to increase engine torque and reduce speed at the car wheels.

Figure 24 illustrates the humpage reduction gear. Typically the planet gears are mounted on a movable arm or carrier which itself may rotate relative to the sun gear epicyclic gearing systems also incorporate the use of an outer ring gear or annulus which meshes. The planet gear in figure 23 rotates about a fixed bevel gear at the center of which is the driven shaft. Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer or planet gears or pinions revolving about a central sun gear or sun wheel.

Planetary bevel gears two forms of planetary gears of the bevel type are shown in figures 23 and 24. For example if the sun gear has 20 teeth and the ring gear has 60 the planetary gear has 80 teeth. R 2 p s. Working out planetary gear turns ratios working out the gear ratio of a planetary gear train can be.

In this tutorial we w. For this reason the transmission ratio in the case of a fixed carrier also called fixed carrier transmission ratio or stationary transmission ratio i 0. 42 2 12 18 these pictures are part of a fasincatingly complicated planetary gear drive by ronald walters. One of the planetary gearsets from our transmission has a ring gear with 72 teeth and a sun gear with 30 teeth.

The gear ratio formula for two meshing gears is simple and intuitive while the gear ratio formula for the planetary mechanism is not. The next steps depend on the state of the planetary gears connected to the carrier although all use the same formula. Gear generator is a tool for creating involute spur gears and download them in svg format. Choosing which piece plays which role determines the gear ratio for the gearset.

In addition it let you compose full gear layouts with connetcted gears to design multiple gears system with control of the input output ratio and rotation speed. The term gear ratio is used to calculate speed and torque of output gear when torque is applied to the input gear.