Circular-arc concave-convex engaged gear and rack mechanism without relative slide

Abstract

The invention relates to a circular-arc concave-convex engaged gear and rack mechanism without relative slide. The circular-arc concave-convex engaged gear and rack mechanism comprises a transmission pair consisting of a spiral circular-arc gear and a circular-arc rack, wherein spiral concave circular-arc tooth sockets are uniformly distributed in the outer surface of the spiral circular-arc gear; convex circular-arc teeth are uniformly distributed on the surface of the circular-arc rack; the spiral concave circular-arc tooth sockets are matched with the convex circular-arc teeth; the spiral circular-arc gear is connected with a rotating shaft of a driving device; the center line of each spiral concave circular-arc tooth socket is equal-lifting-distance cylindrical helix; and the structural shape of the spiral circular-arc gear and the structural shape of the circular-arc rack are determined by design parameters. When the mechanism is mounted, correct engagement of the spiral concave circular-arc tooth sockets and the convex circular-arc teeth needs to be guaranteed to realize the transmission of the circular-arc gear and the circular-arc rack. When the gear and rack mechanism disclosed by the invention is in transmission, failures modes, such as the slide of tooth surfaces, agglutination of the tooth surfaces, wear of the tooth surfaces, and plastic deformation of the tooth surfaces are avoided; the gear and rack mechanism has the advantages of being high in overlap ratio, simple in structure, easy to process, high in transmission efficiency, high in bearing capacity and the like; and the gear and rack mechanism is suitable for being popularized and applied in the field of mini machinery, micro-machinery and conventional machinery.

Description

technical field [0001] The invention relates to a concave-convex meshing circular arc gear and rack mechanism without relative sliding, in particular to a concave-convex meshing circular arc gear tooth without relative sliding for rack and pinion transmission based on the principle of curve meshing article organization. Background technique [0002] Gear transmission is the basic form of transmission in mechanical transmission. The development of modern industrial equipment has further increased the requirements for the quality and performance of gear transmission components. In recent years, there have been diversified gear meshing forms and corresponding diversified tooth shaped structure. For example, a new type of tiny transmission mechanism has been innovated in the field of gear meshing theory at home and abroad. In the Chinese patent literature, the patent number is 201010105902.3, which discloses "a kind of oblique gear mechanism", and the patent number is 20151005...

AI Technical Summary

Problems solved by technology

However, the meshing principles of these two rack and pinion pairs strictly follow the meshing theory of curved surfaces. From the design theory, there must be relative sliding between the tooth surfaces, so traditional tooth surface wear, tooth surface gluing and tooth surface plastic deformation cannot be avoided. The common failure mode of gear transmission has seriously affected the service life and reliability of the gear pair. At the same time, because the involute tooth shape adopted is a cantilever beam structure, and the meshing method of the tooth surface is convex-plane meshing, the bending strength and contact The strength is not high, and its carrying capacity is limited

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