25helical_gears (1)

25helical_gears (1) - Helical Gears advantages . greater...

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Helical Gears ref: Gear Drive Systems; Design and Application, Peter Lynwander advantages . .. teeth are at angle to rotation, contact is a series of oblique greater load capacity lines with several lines in contact simultaneously. total smoother operation length of contact varies as teeth mesh. less sensitivity to tooth errors offset adjacent "strings" in involute generator concept on base cylinder by angle ψ 2 ⋅π⋅ R B L = lead L = tan ( ψ B ) R B = base_radius L 2 ⋅π⋅ R B ψ B = base_helix_angle tan ( ψ B ) = L develop normal at any radius on tooth by considering transverse and normal planes intersecting tooth at that point geometry development 2* π *RB ψ B A B D E 0 0 , Xn Yn , Zn) , ( , , Zn1) , ( , , Z_line) , ( , , Zg , ( , ( , Xn1 Yn1 X_line Y_line Xg Yg ) XY , Z) 11/22/2004 1
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point B . .. point on gear for normal with helix (shown off gear) point A . .. point on radial line 0,0 to B perpendicular joining tangent point D . .. tangent point point E . .. point on plane perpendicular to tooth at B, connecting with (transverse) tangent point along R
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25helical_gears (1) - Helical Gears advantages . greater...

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