【20160417】Profile-shifted gears
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$ Y" z; S t dTo avoid interference on small pinions, the tooth form can be changed from the standard.
7 {8 Q @* j9 v2 S4 A% q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。2 {0 _) H4 M, x, y1 j! m$ E" n
& S+ K8 Q/ F+ B% T. J E5 iStandard gears:
$ {- G" \9 l" O8 |) capinion= agear
; q( g: a ^6 N9 |! E! z标准齿轮:大轮小轮齿顶高相等
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; E: j) {1 S! d, LProfile-shifted gears:3 R9 ^$ F( i. C% z
apinion> agear
; a2 s+ B4 _- _8 G4 A变位齿轮:小轮齿顶高大于齿根高5 W& g) J* L4 \
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The AGMA defines addendum modification coefficients, x1 and x2.
; V9 W9 n# _1 {, `x1>0: is applied to increase the pinion addendum w# u( ~: _: }! }
x2<0: is applied to decrease the gear addendum& _8 f7 _% a8 o0 y8 x8 p; d8 [
X1提高小轮齿顶高,X2提高大轮齿顶高。( q' C1 Q$ q/ U* R7 O+ ]
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Objective
( p, r( [5 S9 w9 Y7 c* G/ u, CTo shift the pinion addendum circle outside its base circle and eliminates the noninvolute portion of pinion tooth below the base circle.! C+ \- L8 W: V6 A0 q1 J7 q
The standard coefficients are ±0.25 and ±0.50
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改变小轮基圆外的齿顶高,减小基圆内非渐开线部分的齿。
/ T( x7 Q* i- H. o9 Y( ~标准系数正负0.25和正负0.5.3 o. K! A& F1 b
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