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Design method for rack tooth profile of gear pair of recirculating ball type variable-ratio steering gear

A design method and steering gear technology, applied to components with teeth, belts/chains/gears, mechanical equipment, etc., can solve problems such as low design accuracy, limited calculation step size, large design errors, etc., and achieve calculation accuracy High, no principle error effect

Active Publication Date: 2015-01-07
WUHAN UNIV OF TECH +1
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AI Technical Summary

Problems solved by technology

The traditional Fancheng simulation design method, although the design process is relatively simple and the degree of parameterization is high, but the calculation step is limited, the design accuracy is not high, and subsequent surface fitting is required, resulting in large design errors

Method used

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  • Design method for rack tooth profile of gear pair of recirculating ball type variable-ratio steering gear

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings, but the present invention is not limited.

[0022] Such as figure 1 Shown, the present invention comprises the following steps:

[0023] Such as figure 1 As shown, the present invention includes the following steps: S1: step of calculating basic design parameters; S2: step of determining section; S3: step of selecting reference point; S4: step of selecting instantaneous point of movement; S5: step of solving corner; S6: solving step of intersection point Step; S7: step of solving the height of the tooth profile at the reference point; S8: step of solving the tooth profile of the selected section; S9: step of solving the tooth profile of the entire rack.

[0024] The solution process of the present invention is: S1: First, calculate the addendum circle radius, tooth Radius of the root circle, etc.

[0025] S2: Select the initial section y=y 0 , first need t...

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Abstract

The invention relates to a design method for a rack tooth profile of a gear pair of a recirculating ball type variable-ratio steering gear. The design method is characterized by including the following steps: allowing a gear and a rack to be meshed for transmission according to a transmission ratio rule, selecting a reference point on the rack, and solving contact point height of the reference point at every motion instant to obtain a corresponding height set; according to positional relation of a sector and the rack, solving an extreme value of the height set, wherein the obtained extreme value is the height of a tooth profile point corresponding to the reference point; changing the position of the reference point to further obtain the tooth profile points of the whole section and the entire rack tooth profile surface. The generating simulation principle is not adopted, various problems of the traditional method are avoided, principle error is avoided, and digital solving can be realized.

Description

technical field [0001] The invention belongs to the technical field of mechanical transmission, and relates to a spur gear and rack pair, in particular to a design method for a gear pair rack tooth profile of a recirculating ball type variable ratio steering gear. Background technique [0002] In order to improve the steering performance of the recirculating ball steering gear, the gear and rack can be meshed and driven according to the proposed variable transmission ratio. In the gear pair design of the recirculating ball type variable ratio steering gear, considering the complexity of the machining of non-standard tooth sectors, the tooth sector is generally set to the standard tooth shape, and the tooth shape parameters are known, while the rack tooth profile is unknown. In order to manufacture and analyze the performance of the gear pair of the recirculating ball type variable ratio steering gear, the rack tooth profile must be designed. The traditional Fancheng simulat...

Claims

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Application Information

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IPC IPC(8): F16H55/08
CPCF16H55/08F16H55/26
Inventor 胡剑牛子孺李刚炎胡少良吴其洲胡大伟毛元祥黄鹤
Owner WUHAN UNIV OF TECH
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