transmission is very important for delivering adequate power and

來源: 先想一想再說 於 2013-09-13 11:53:09 [] [舊帖] [給我悄悄話] 閱讀數 : (5651 bytes)
回答: TBz請-第一課: 杠杆原理 由 其樂無窮 於 2013-09-13 11:15:42

http://en.wikipedia.org/wiki/Gear_ratio


Torque ratio[edit source | editbeta]

A gear train can be analyzed using the principle of virtual work to show that its torque ratio, which is the ratio of its output torque to its input torque, is equal to the gear ratio, or speed ratio, of the gear train.

This means that the input torque TA applied to the input gear GA and the output torque TB" on the output gear GB are related by the ratio

R = \frac{T_B}{T_A},

where R is the gear ratio of the gear train.

The torque ratio of a gear train is also known as its mechanical advantage, thus

MA = \frac{T_B}{T_A} = \frac{N_B}{N_A}.
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