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Abstract

A variable-tooth gear with sliding-sheet deforming teeth pertains to the technical fields of gearing, and continuously variable mechanical transmissions. The variable-tooth gear is designed in accordance with 'the principle of configuring variable-teeth through infinitely deforming sliding-sheets'. The working surface is composed of a large number of thin sliding-sheets (sliding-needles) superposed on one another. The meshing tooth profiles of arbitrary shapes can be configured by the free and infinite sliding of the sliding-sheets. Since the direction of sliding of the sliding-sheets is different from the direction of forces acting thereupon, the sliding-sheets can freely deform with the current tooth profiles. The direction of the force acting upon the sliding-sheet when transmitting power is perpendicular to the free-sliding direction, or the angle therebetween is within the equivalent friction angle, therefore the sliding-sheet possesses the self-locking property. The tooth profile thus remains unchanged when the sliding-sheets are under stress. All the sliding-sheets form an integrally closed elastic enclosure ring, possessing the effect of 'rigidity and flexibility being combined, variable-tooth being fixed'. Therefore the load capacity is high, the transmission is a one-stage transmission and the transmission efficiency is high. There are only two key components, such that the structure is simple, the cost is low and the size is compact. This variable-tooth gear realizes, to the core, the concept of 'continuously variable transmission via gear meshing', and can be applied to vehicles or industrial fields of high speed and large power.

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