Convex-concave engaged arc gear and rack mechanism without relative sliding

Abstract

The invention relates to a convex-concave engaged arc gear and rack mechanism without relative sliding. The convex-concave engaged arc gear and rack mechanism without relative sliding comprises a transmission pair consisting of a spiral arc gear and an arc rack, wherein the spiral arc gear is connected with a rotating shaft of a driver; spiral convex arc teeth are uniformly distributed on the outer surface of the spiral arc gear; center lines of the spiral convex arc teeth of the spiral arc gear are equal-lift cylindrical spiral lines; concave arc tooth grooves are uniformly distributed in the upper surface of the arc rack; the spiral convex arc teeth are matched with the concave arc tooth grooves; and the structural shape of the spiral arc gear and the structural shape of the arc rack are determined by design parameters. When the mechanism is mounted, the spiral convex arc teeth are correctly engaged with the concave arc tooth grooves, and therefore, arc gear and rack transmission is realized. The arc gear and rack mechanism does not have failure modes such as tooth surface relative sliding, tooth surface gluing, tooth surface abrasion and tooth surface plastic deformation, has the advantages of high contact ratio, simple structure, high transmission efficiency, high bearing capacity and the like, and is suitable for being popularized and used in the fields of tiny machines, micro-machines and conventional machines.

Description

technical field [0001] The invention relates to a convex-concave meshing circular arc gear and rack mechanism without relative sliding, in particular to a convex-concave 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] As the basic form of transmission in mechanical transmission, gear transmission is widely used in the fields of industry, agriculture, medicine, national defense, military and aerospace. The development of modern industrial equipment has further increased the requirements for the quality and performance of gear transmission components. The design theory and manufacturing technology of the new high-performance gear transmission mechanism have promoted the continuous improvement and innovation of the gear meshing theory, and there have been diversified gear meshing forms and corresponding diversified tooth structures. [0003] In...

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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