Involute arc tooth profile bevel gear and meshing pair thereof

Abstract

The invention discloses an involute arc tooth profile bevel gear and a meshing pair thereof. The tooth profile curve of bevel gear is formed by the way that an arc does helical motion along the tooth surface contact line on involute helicoids, thus having the advantages that involute gear center distance has separability and is convenient to measure, involute gear is convenient to manufacture and an arc gear has high contact strength and good running-in property, tooth surface contact stress is reduced, tooth surface carrying capacity is greatly improved, and processing is convenient; and the tooth curve of the arc and the radial length of involute participating in meshing are short, thus avoiding undercutting phenomenon of standard gear, so that minimum tooth number of the gear can reach 1. Compared with the gear in the prior art, weight and size are greatly reduced; and the meshing pair adopts the way that a convex gear is meshed with a concave gear, and carrying capacity is high.

Description

technical field [0001] The invention relates to a transmission gear and its meshing pair, in particular to a helical gear and its meshing pair. Background technique [0002] Gears are toothed mechanical parts that can mesh with each other, and are a basic transmission component. In mechanical transmission, gears rely on special tooth profiles to ensure their transmission accuracy and transmit power; in various gear meshing pairs, involute gear transmission has many advantages such as the separability of its center distance and the convenience of manufacturing and measurement. , has been widely used. However, involute gears also have disadvantages such as the farther the meshing point is from the node, the greater the relative sliding speed between the two meshing tooth surfaces. Sliding has adverse effects on tooth surface wear, transmission stability, transmission efficiency and gear life; At the same time, the involute external gear transmission is the meshing transmissi...

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Problems solved by technology

However, involute gears also have disadvantages such as the farther the meshing point is from the node, the greater the relative sliding speed between the two meshing tooth surfaces. Sliding has adverse effects on tooth surface wear, transmission stability, transmission efficiency and gear life; At the same time, the involute external gear transmission is the meshing transmission of convex teeth to convex teeth. From the perspective of contact strength, the bearing capacity of this meshing method is relatively poor.

With the development of production and technology, higher requirements are put forward for high-speed, heavy-duty, high-power gear transmissions. As a result, arc gears appear and develop rapidly; Contact form transmission has high contact strength, and arc gears have good running-in performance, and their equivalent curvature radius is much larger than that of involute gears, so the contact strength is compared with that of involute gears Greatly improved, but arc gears have some shortcomings such as sensitivity to center distance and low bending strength of dedendum, which hinder the improvement of bearing capacity and transmission accuracy, and it is difficult to meet the special requirements for arc gear transmission

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