【20160417】Profile-shifted gears
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6 G3 H: ]$ C' m* S) aTo avoid interference on small pinions, the tooth form can be changed from the standard.
% O: t* N2 ]" @3 k, f! r9 g+ X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。
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Standard gears:
7 ]& N* Q6 X7 a1 _apinion= agear
$ Y! ?. b" J; X" \+ q標準齒輪:大輪小輪齒頂高相等5 A7 r5 k* l) g. Z0 ?
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, z8 d F; U/ B3 I! s' zProfile-shifted gears:# {7 }8 n2 T$ e
apinion> agear2 k! t+ k- m- [
變位齒輪:小輪齒頂高大于齒根高/ y$ r9 n( @* S |/ H
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The AGMA defines addendum modification coefficients, x1 and x2.5 d# e. D6 e* s6 h4 h) |3 k* h
x1>0: is applied to increase the pinion addendum
' y$ h v& ^7 u: L; O- [+ t8 Xx2<0: is applied to decrease the gear addendum
" |5 P& T2 h8 e# j1 VX1提高小輪齒頂高,X2提高大輪齒頂高。
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3 S; M* z2 \# w5 u* {. u3 rObjective( T) _$ a; I7 d8 n: G5 p; r
To shift the pinion addendum circle outside its base circle and eliminates the noninvolute portion of pinion tooth below the base circle.: E1 |/ r, g# J& F# n
The standard coefficients are ±0.25 and ±0.50$ p- C3 I6 M) y" o. n' y4 M! r
目標* i8 d1 d7 K3 Y& ]+ f% r
改變小輪基圓外的齒頂高,減小基圓內非漸開線部分的齒。, A0 y1 d7 |. M5 X% }: ?
標準系數正負0.25和正負0.5.# _0 ~; a5 t1 M0 x, [9 [
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