Importance

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Abstract

The present application discloses an internal engagement transmission mechanism, comprising an outer wheel and an inner wheel. The outer wheel is provided with outer wheel inner teeth, and comprises an outer wheel inner tooth crest and an outer wheel inner tooth waist. The inner wheel is provided with inner wheel outer teeth, and comprises an inner wheel outer tooth crest and an inner wheel outer tooth waist. The inner wheel and the outer wheel form an internal engagement transmission through the inner wheel outer tooth waist and the outer wheel inner tooth waist. The outer wheel inner tooth waist and the inner wheel outer tooth waist are curved surfaces which have the same shape and are coincident. The inner wheel outer tooth waist and the outer wheel inner tooth waist form surface contact engagement, and the contact area between the inner wheel outer tooth waist and the outer wheel inner tooth waist gradually increases to a maximum value as the inner wheel rotates, and then gradually decreases. The internal engagement transmission mechanism of the present application can reduce stress concentration when the inner wheel is engaged with the outer wheel and improve the service life of teeth.

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First Claim