22 322 mechanical design ii
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22.322 Mechanical Design II. Spring 2013. Lecture 12. Planetary Gear Trains. The conventional gear trains described in the previous lectures are all one-degree-of-freedom devices. Planetary gear trains are two-DOF devices  two inputs are needed to obtain a predictable output.

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22.322 Mechanical Design II

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22 322 mechanical design ii

22.322 Mechanical Design II

Spring 2013


Lecture 12

Lecture 12

Planetary Gear Trains

  • The conventional gear trains described in the previous lectures are all one-degree-of-freedom devices.

  • Planetary gear trains are two-DOF devices  two inputs are needed to obtain a predictable output.

  • Planetary gear trains are used because they can obtain very large or small gear ratios and are able to transmit more power than ordinary gear trains.

Note how planet gear orbits around sun gear


Lecture 121

Lecture 12

The Formula Method

Usually an input

Usually an unknown


Lecture 122

Lecture 12

The Formula Method


Lecture 123

Lecture 12

The Formula Method


Lecture 124

Lecture 12

The Formula Method


Lecture 125

Lecture 12

The Formula Method


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