By A. B. Clemens

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Extra resources for Applied Mechanics And Strength Of Materials

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In Fig. 23 and 12-tooth pinion. Tooth outlines for the is shown a rack rack in the cycloidal system are obtained by rolling the generating circles oo' on the straight pitch line the curves are B B; therefore cycloids. The generating circle o passes through the center O of the pinion and rolls the pitch circle on A A, 22. FIG. 23 and therefore describes radial flanks. Epicycloidal Annular Gears. Annular gears, or internal gears, as already explained, are those having teeth cut on the inside of the rim.

Ans. ' ~ In Fig. 20, Pig. -Applying formula 2 and 4 /may inches- and C, 24 mcnes, Applying formula 1, P= X 80 pounds; B to P of produce a pressure what force 180 pounds? Ans. 40 Ib. In a togglejoint similar to that in Fig. 20, the arms OB, equal, each being 14 inches in length; the height and the force is 2,800 pounds. Find the equais BQ are AH B G* F inches; CQ Ans. 74 QC > 24 inches ! ^^- Ib 16 Ans. 462 Ib. LINK MECHANISMS 24 F of 200 pounds, Fig. 20, should act at right In case a force 4. when Q C equals 32 inches; at JB, find the pressure angles to the angle that P QA, 8 inches; and OQ, 60 inches, remembering that thp to is ingle Q O A.

Now let an arc of the curve B taken as the outline of the face of a tooth on a, and let an arc be taken as the outline of the flank of the hypocycloid l , P CPd of a tooth on PE is over, These curves are in contact at P, and, morenormal to each of them. Hence, the common a-,. normal through the point of contact passes through the pitch point, and the curves satisfy the condition required of tooth outlines. The one rolling circle m generates the faces of the teeth of and the flanks of the teeth of a*.

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Applied Mechanics And Strength Of Materials by A. B. Clemens

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