【20160417】Profile-shifted gears
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& a1 U) U* ~3 r# h1 a6 J; M5 s" i3 z; JTo avoid interference on small pinions, the tooth form can be changed from the standard.: _2 d/ {' A0 M4 d x( u
為避免小齒輪的干涉問題,齒的形狀可以從標準型作適當轉化。8 G- o) A3 f: a" m& H" H
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2 {. o' [6 E* I/ OStandard gears:
Y* \2 j, u' v$ W1 _% uapinion= agear, m4 e$ C# s: r! T# Y8 `% g. z# ~
標準齒輪:大輪小輪齒頂高相等
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Profile-shifted gears:4 q2 F4 J7 A% P4 D
apinion> agear d( T! a4 s* M W& k
變位齒輪:小輪齒頂高大于齒根高
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/ X3 _: ~* L% E* [, BThe AGMA defines addendum modification coefficients, x1 and x2.1 A4 w+ v6 t" F8 o/ _
x1>0: is applied to increase the pinion addendum
( C7 M- b0 v: ~$ V( b. `: ]x2<0: is applied to decrease the gear addendum% A J6 ^/ j) _
X1提高小輪齒頂高,X2提高大輪齒頂高。
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$ b3 f9 k& y1 l6 IObjective
/ C4 q; w( p) w. ~; k" aTo shift the pinion addendum circle outside its base circle and eliminates the noninvolute portion of pinion tooth below the base circle.: H3 S0 A3 `6 b/ `
The standard coefficients are ±0.25 and ±0.50
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4 v( ~- C% l% v/ |7 Z+ b) \. ^改變小輪基圓外的齒頂高,減小基圓內非漸開線部分的齒。
/ A$ s% i! N) U7 W6 Y標準系數正負0.25和正負0.5.
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