Tu's negative arc gear tooth

Abstract

The invention provides a Tu's negative arc gear tooth, which relates to a gear tooth structure and is formed by sequentially and staggeringly connecting tooth top arcs and tooth flute arcs. The tooth top arcs and the tooth flute arcs have same diameter, percentage of the tooth height to the tooth width ranges from 80% to 90%. The Tu's negative arc gear tooth is different from a gear with volute teeth, the tooth width is larger than the tooth height, the arc teeth in arc face contact generate approximate rolling friction between circles during transmission, the approximate rolling fiction is different from sliding friction generated in micro-arc profile contact of volute gears, friction coefficient is small so that transmission loss is reduced, and energy conservation and transmission efficiency improvement are effective. No stress point is arranged on the tooth flute arcs, and accordingly the Tu's negative arc gear tooth is higher in strength and capable of transmitting higher torque. The friction coefficient can be reduced by more than 50% according to different structures and loads, energy saving effect is evident, the approximate rolling friction effect can be achieved in use of arc bevel gears during axial intersecting transmission as spiral friction angle of the bevel gears can be reduced by the aid of the circles, and accordingly the friction coefficient is reduced further.

Description

technical field [0001] The invention relates to a Tu's negative arc-shaped gear tooth for mechanical transmission. Background technique [0002] In the existing gear structure, the teeth are composed of two involutes connecting the tooth top and the tooth bottom respectively. The tooth top and the tooth bottom are both planar structures, and the connection structure between the plane and the curved surface has edges and corners, which brings resistance to gear transmission, and Excessive resistance is likely to cause the teeth to break from the root of the tooth, which cannot achieve effective transmission and affects the service life of the product. Due to the setting of the planar structure, more energy is lost during the transmission process, the energy saving effect is poor, and the root of the tooth is prone to damage caused by stress points. Contents of the invention [0003] The patented invention provides a Tushi negative arc-shaped gear tooth, which effectively o...

AI Technical Summary

Problems solved by technology

[0002] In the existing gear structure, the teeth are composed of two involute lines connecting the tooth top and the tooth bottom respectively. The tooth top and the tooth bottom are both planar structures, and the connection structure between the plane and the curved surface has edges and corners, which brings resistance to gear transmission, and Excessive resistance is likely to cause the teeth to break from the root of the tooth, which cannot achieve effective transmission and affects the service life of the product

Due to the setting of the plane structure, more energy is lost during the transmission process, the energy saving effect is poor, and the root of the tooth is prone to damage due to stress points

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