Method for designing gear sector tooth profile of recirculating ball variable-ratio steering-gear gear pair

A design method and steering gear technology, applied in belts/chains/gears, instruments, mechanical equipment, etc., can solve problems such as low design accuracy, large design error, and calculation step limit.

Active Publication Date: 2015-03-25
WUHAN UNIV OF TECH +1
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Problems solved by technology

The traditional Fancheng simulation design method, although the design process is relatively simple and the degree of parameterization is high, b

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  • Method for designing gear sector tooth profile of recirculating ball variable-ratio steering-gear gear pair

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings, but the present invention is not limited.

[0020] like figure 1 As shown, the present invention includes the following steps: S1: step of calculating basic design parameters; S2: step of determining the section; S3: step of selecting the rotation angle of the gear sector; S4: step of calculating the instantaneous pitch circle radius and rack displacement; S5: finding the meshing point Steps; S6: step of finding tooth profile points; S7: step of perfecting tooth shape; S8: step of solving the tooth profile of the selected section; S9: step of solving the tooth profile of the entire tooth sector.

[0021] The solution process of the present invention is:

[0022] S1: First calculate the addendum height of the standard rack according to the basic design parameters of the standard rack, including the rack modulus m, the number of rack teeth Z, the addendum height...

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Abstract

The invention discloses a method for designing a gear sector tooth profile of a recirculating ball variable-ratio steering-gear gear pair. According to a gear-sector and rack transmission ratio law, a gear-sector and rack meshed point is obtained by calculating the instant pitch radius and the rack displacement, coordinate conversion is carried out on the meshed point to obtain a tooth profile point, finally a tooth shape is perfected, and a whole gear sector tooth profile point is obtained. The method mainly includes the following steps: S1, calculating basic design parameters; S2, determining a cross section; S3, selecting a gear sector rotational angle; S4, calculating the instant pitch radius and the rack displacement; S5, solving the meshed point; S6, solving the tooth profile point; S7, perfecting the tooth shape; S8, solving the gear sector of the selected cross section; S9, solving the whole gear sector tooth profile. The method has the advantages that principle errors are avoided, and the solving accuracy is high; the method is a parametric design method and is suitable for solving gear sector tooth profiles of all straight-tooth type gear pairs.

Description

technical field [0001] The invention belongs to the technical field of mechanical transmission, and relates to a straight-toothed rack and pinion pair, in particular to a design method for a tooth profile of a gear pair 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 design of the gear pair of the recirculating ball type variable ratio steering gear, the rack is generally set as a standard tooth shape, and the tooth shape parameters are known, while the tooth profile of the tooth sector is unknown. In order to manufacture and analyze the performance of the gear pair of the recirculating ball type variable ratio steering gear, it is necessary to design the tooth profile of the tooth sector. The traditional Fancheng simulation design method, althou...

Claims

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Application Information

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IPC IPC(8): F16H55/17F16H55/08
CPCF16H55/08F16H55/17G16Z99/00
Inventor 胡剑胡少良牛子孺吴其洲毛元祥胡大伟黄鹤李刚炎
Owner WUHAN UNIV OF TECH
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