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Epicyclic gearing can be used in a torque multiplier. The sun gear (yellow) is driven by an input torque. The planet gear carrier (green) provides the output torque, while the ring gear (red) is fixed. Note the red marks both before and after the input drive (yellow) is rotated 170° clockwise.
The load in a planetary gear train is shared among multiple planets; therefore, torque capability is greatly increased. The more planets in the system, the greater the load ability and the higher the torque density. The planetary gear train also provides stability due to an even distribution of mass and increased rotational stiffness.
The sun and planet gear converted the vertical motion of a beam, driven by a steam engine, into circular motion using a 'planet', a cogwheel fixed at the end of the connecting rod (connected to the beam) of the engine. With the motion of the beam, this revolved around, and turned, the 'sun', a second rotating cog fixed to the drive shaft, thus ...
A planetary reduction drive is a small scale version using ball bearings in an epicyclic arrangement instead of toothed gears. Reduction drives are used in engines of all kinds to increase the amount of torque per revolution of a shaft: the gearbox of any car is a ubiquitous example of a reduction drive.
Torque is applied to the input gear which engages with a number of planet gears which are held in a fixed planetary gear. By using a reaction arm, the outside casing of the multiplier is prevented from rotating, causing the planet gears to rotate around the input gear.
Sun and planet gear; T. Torque multiplier; Gear train; U. Uni Wheel; W. Wheel train; Worm drive; Wuest type herringbone gear This page was last edited on 18 ...
It contains a planetary torque multiplier or a gearbox. A reaction device that absorbs the torque rather than the tool operator. The torque output is adjusted by varying the voltage on the motor. The battery torque wrench is used to remove stubborn nuts, or to apply accurate torque. The gearboxes can have multiplication ratios up to 125:1.
At stall, the torque converter can produce maximum torque multiplication if sufficient input power is applied (the resulting multiplication is called the stall ratio). The stall phase actually lasts for a brief period when the load (e.g., vehicle) initially starts to move, as there will be a very large difference between pump and turbine speed.
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