A hy-vo toothed chain with ultra-small rolling radius

Abstract

The invention discloses a Hy-Vo toothed chain with an ultra-small counter-rolling radius, which is composed of several connecting units. The connecting unit is composed of a chain plate and two paired round pins. Two chain plate holes that are symmetrical about the axis of symmetry in the vertical direction of the chain plate. The chain plate holes include a connected chain plate hole outer hole and a chain plate hole inner hole. When the connecting units are connected to each other, the left (right) side is adjacent The right (left) side positioning pair rolling pin of the connecting unit penetrates into the inner hole of the left (right) side chain plate hole of the intermediate connecting unit, and at the same time aligns with the positioning pairing in the outer hole of the left (right) side chain plate hole of the intermediate connecting unit. Roll the pin tangent. When the adjacent connecting unit rotates relative to each other, the equivalent pitch of the intermediate connecting unit increases with the increase of the relative rotation angle with the adjacent connecting unit, so that the polygonal effect of the chain drive system is reduced to the greatest extent, At the same time, the special-shaped pin shaft is replaced by the pair of rounded pins, which reduces the manufacturing and assembly requirements and reduces the cost.

Description

technical field [0001] The invention relates to the technical field of mechanical chain transmission, in particular to a Hy-Vo toothed chain with an ultra-small anti-rolling radius. Background technique [0002] Hy-Vo toothed chain is a high-end toothed chain product with variable pitch characteristics. By using the counter-rolling pin shaft, its pitch can show periodic changes with the increase of the angle of the sprocket, which can be further reduced. The polygonal effect of the transmission system is eliminated. Compared with general toothed chains, Hy-Vo toothed chains have a series of advantages such as smaller meshing impact, lower noise, and higher transmission stability, and then Hy-Vo toothed chains can replace general toothed chains in the high-end transmission field. potential trend of the chain. [0003] According to the type of chain plate hole shape, Hy-Vo toothed chain can be roughly divided into: long waist-shaped hole Hy-Vo toothed chain, heart-shaped hol...

AI Technical Summary

Problems solved by technology

This feature makes the existing Hy-Vo toothed chain unable to reduce the polygonal effect of the transmission system to the greatest extent, and even its transmission performance is weaker than that of the general toothed chain under certain working conditions, thus limiting the size of the Hy-Vo toothed chain scale application

[0005] On the other hand, for all types of Hy-Vo toothed chains in existence, the counter-rolling pins used are special-shaped pins. This special-shaped pin has a series of disadvantages such as difficult processing, high manufacturing cost, and high assembly requirements. The manufacturing cost of the Hy-Vo toothed chain is very high, which further hinders the application and promotion of the Hy-Vo toothed chain

[0006] The existing Chinese patent CN201210189522.1 is also a technical means that can reduce the polygonal effect of the system. CN201210189522.1 relates to a double-clutch automatic transmission twin-chain transmission system, which uses two hanging chains that are staggered by half the tooth pitch The angle reduces the polygonal effect, and does not solve the problem of the mismatch between the equivalent pitch of the Hy-Vo toothed chain and the variable pitch requirements from the design of the chain plate

Another existing Chinese patent CN201220604212.7 relates to a variable-pitch rolling-pin toothed chain for a gasoline engine transfer case, which reduces system fluctuations by improving and correcting the special-shaped pin shaft and its long waist-shaped chain plate hole , did not fundamentally solve the problem of strict correlation between the equivalent pitch and the angle of the sprocket, and did not solve the problem of difficulty and high cost in the manufacture of special-shaped pin shafts

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