How To Draw Gears By Hand
Spur Gear Cartoon
The gear ratio is the ratio of the number of teeth in the gear to the number of teeth in the pinion, the pinion beingness the smaller of the ii gears in mesh.
The pitch-circle diameters of a pair of gears are the diameters of cylinders co-axial with the gears which will roll together without slip. The pitch circles are imaginary friction discs, and they touch at the pitch point.
The base circumvolve is the circumvolve from which the involute is generated.
The root diameter is the diameter at the base of operations of the tooth.
The centre distance is the sum of the pitch-circle radii of the two gears in mesh.
The addendum is the radial depth of the tooth from the pitch circle to the tooth tip.
The dedendum is the radial depth of the tooth from the pitch circumvolve to the root of the tooth.
The clearance is the algebraic difference between the addendum and the dedendum.
The whole depth of the tooth is the sum of the addendum and the dedendum.
The round pitch is the distance from a point on one tooth to the corresponding point on the adjacent tooth, measured round the pitch-circle circumference.
The tooth width is the length of arc from i side of the molar to the other, measured circular the pitch-circumvolve circumference.
The module is the pitch-circumvolve diameter divided past the number of teeth.
Fig. 24.15 Spur-gear terms
Fig. 24.xvi Gear conventions
Fig. 24.xv Spur-gear terms
Fig. 24.16 Gear conventions
The diametral pitch is the reciprocal of the module, i.due east. the number of teeth divided past the pitch-circle diameter.
The line of action is the common tangent to the base circles, and the path of contact is that part of the line of action where contact takes identify between the teeth.
The pressure level bending is the bending formed between the common tangent and the line of action.
The fillet is the rounded portion at the lesser of the tooth space.
The various terms are illustrated in Fig. 24.15.
Continue reading here: Anfractuous gear teeth proportions and relationships
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