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Tooth shape matching design method for timing chain wheel and timing chain of engine

A timing sprocket and design method technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve problems such as unsound methods, large friction work between the chain and the sprocket tooth shape, and the chain is easy to skip teeth, etc., to achieve Simple design, large friction work and reasonable structure

Inactive Publication Date: 2017-02-22
BRILLIANCE AUTO
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a tooth profile matching design method for the engine timing sprocket and timing chain, which solves the problem that the existing sprocket and chain tooth profile matching design method is not perfect, resulting in large friction work between the chain and the sprocket tooth profile. It has the advantages of simple design and reasonable structure to deal with complex problems such as easy tooth jumping of the chain

Method used

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  • Tooth shape matching design method for timing chain wheel and timing chain of engine
  • Tooth shape matching design method for timing chain wheel and timing chain of engine
  • Tooth shape matching design method for timing chain wheel and timing chain of engine

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Embodiment Construction

[0025] Attached to the following Figures 1 to 9 Embodiments of the present invention are described in further detail. like Figures 1 to 9 As shown in the figure, a design method for matching the tooth shape of an engine timing sprocket and a timing chain, the specific design steps are as follows: the sprocket pitch is 6.35mm, and the number of teeth is 23 teeth.

[0026] 1. Establish a two-dimensional model of the tooth shape of the chain plate

[0027] like figure 1 As shown in the figure, the structure of the chain plate 1 is set, and the model is established.

[0028] 2. Drop the chain, drop the chain plate onto the pitch circle of the sprocket

[0029] like figure 2 and 3 As shown, from the relationship between the chain tooth profile and the sprocket tooth profile, the formula D=P / sin (180° / Z) can be used to calculate the sprocket pitch circle 2-1 when the sprocket is working, and the diameter D= 46.63, with the center line 3 of the chain plate as the auxiliary ...

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Abstract

The invention provides a tooth shape matching design method for a timing chain wheel and a timing chain of an engine, and solves the complicated problems that in the prior art, the tooth shape friction work between the chain and the chain wheel is large, the chain easily drops out of teeth and the like due to an imperfect tooth shape matching design method. The tooth shape matching design method comprises the following steps: establishing a chain plate tooth shape two-dimensional model; dropping a chain plate, that is, dropping the chain plate onto a chain wheel pitch circle; surrounding with the chain plate, that is, surrounding the chain wheel pitch circle with the chain plate; designing the top circle diameter and the root circle diameter of the chain wheel; primarily determining the shape of the chain wheel; solving the displacement coefficient of the chain wheel by a base circle method; determining the final tooth shape of the chain wheel. By the tooth shape matching design method, a complicated calculating process is skillfully avoided, so that the complicated problems that the tooth shape friction work between the chain and the chain wheel is large and the chain easily drops out of the teeth are solved; the tooth shape matching design method has the advantages of simple design and reasonable structure.

Description

technical field [0001] The invention relates to a design method for the tooth shape matching of a sprocket and a chain in the field of transmission devices, in particular to a design method for matching the tooth shape of an engine timing sprocket and a timing chain. Background technique [0002] At present, in the internal combustion engine machinery industry, the chain drive timing system has been widely used in the development process of the engine due to its advantages of high transmission accuracy, good stability, and lifetime maintenance-free. [0003] With the improvement of people's quality of life, consumers have higher and higher requirements for the NVH quality of automobiles, and the toothed chain drive timing system is gradually promoted with its unique noise reduction function. However, there are still great difficulties in the design of the tooth shape matching between the chain and the sprocket, and there is no effective and reasonable manufacturing method. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50F01L1/348
CPCF01L1/348G06F30/17
Inventor 董其超李永纯张治国黄昌瑞李振华
Owner BRILLIANCE AUTO
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