【20160417】Profile-shifted gears
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4 M9 J/ K( S2 `- BTo avoid interference on small pinions, the tooth form can be changed from the standard.
; R' ?, |8 X! [+ z1 e/ {$ t为避免小齿轮的干涉问题,齿的形状可以从标准型作适当转化。
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Standard gears:
' @; V9 n: D) r+ K7 V+ Bapinion= agear
" e' T: A8 Z# g1 a& `. \标准齿轮:大轮小轮齿顶高相等
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Profile-shifted gears:8 [/ E, Y t7 D" u8 ?9 w( a
apinion> agear) k" a7 |9 t7 @% @1 K0 j
变位齿轮:小轮齿顶高大于齿根高
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$ R- d) |" x2 {3 {0 aThe AGMA defines addendum modification coefficients, x1 and x2.
# C) z* I4 }" q5 R. sx1>0: is applied to increase the pinion addendum
: V9 @& s1 G4 k+ i, y, |x2<0: is applied to decrease the gear addendum, O8 a% w( f: u; ?
X1提高小轮齿顶高,X2提高大轮齿顶高。7 r O( x4 V, R/ ]2 x
; \+ D* m ^1 f& bObjective
. b; l! V+ r8 o" ^To shift the pinion addendum circle outside its base circle and eliminates the noninvolute portion of pinion tooth below the base circle.* o& v; @. s. } N$ W
The standard coefficients are ±0.25 and ±0.50
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/ C7 _- N' H# e8 h/ w# T! M% a改变小轮基圆外的齿顶高,减小基圆内非渐开线部分的齿。
7 X) t W! G6 E8 X标准系数正负0.25和正负0.5.! \8 R% n8 t4 ^1 M8 i' }
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