| 摘要 |
A progressive gear assembly comprises at least one spur gear ( 1, 2 ) and a toothed structure ( 3, 4, 5, 7, 8 ) with which the spur gear ( 1, 2 ) meshes. The spur gear ( 1, 2 ) has teeth ( 11 ) arranged along a curve ( 10 ), the curve ( 10 ) comprising a radius of curvature (r) which monotonically rises over an angular range of more than 90° of the curve ( 10 ). Preferably the curve is a spiral, particularly a logarithmic spiral. This gear assembly is configured compact and simple, features smooth running and achieves a late end point.
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