FIELD: transport.
SUBSTANCE: invention may be used in trackless vehicles with engine (automobiles). Proposed transmission gear has at least one spur gear 1, 2 and at least toothed device to be engaged with said spur gear 1, 2. Spur gear 1, 2 has teeth 11 arranged along a curve. Said curve feature curvature radius increasing monotonically in angular range of said curve above 90°. Spiral, particularly logarithmic spiral, is a preferable shape of said curve.
EFFECT: compact and simple design, smooth run.
32 cl, 24 dwg
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