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Design method of automobile steering device gear sector and rack pair

A technology of automobile steering gear and design method, applied in mechanical steering gear, mechanical equipment, belt/chain/gear, etc., can solve the problems of speed impact, sudden change of speed, unevenness, etc., and achieve the effect of smooth steering

Inactive Publication Date: 2015-06-24
HUBEI UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most transmission ratio curves are composed of segmented straight segments, and there is a sharp point between the straight segment and the straight segment, so that the speed changes suddenly when turning, which is not smooth, and there is a speed impact. In recent years, segmented straight segments and cosine function curves have appeared. The transmission ratio curve composed of segments, the addition of the cosine function segment improves the transmission characteristics and makes the speed change smoother, but there is also a flexible impact

Method used

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  • Design method of automobile steering device gear sector and rack pair
  • Design method of automobile steering device gear sector and rack pair
  • Design method of automobile steering device gear sector and rack pair

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example

[0069] The instance parameters are as follows:

[0070] Input parameters:

[0071] i min =20.69;

[0072] i max =24.57;

[0073]

[0074]

[0075]

[0076]

[0077]

[0078] Calculated model parameters:

[0079] a 1 = -2.06697895298326e-05;

[0080] a 2 =0.00107162649791515;

[0081] a 3 =-0.0131334090350978;

[0082] a 4 =0.0613099215760788;

[0083] a 5 =20.5907505748129;

[0084] b 1 =0.161826438593881;

[0085] b 2 =18.5925246071065;

[0086] c 1 = 1.80176900217111e-05;

[0087] c 2 =-0.00266211874097642;

[0088] c 3 =0.140141806303288;

[0089] c 4 =-3.00777750332808;

[0090] c 5 = 44.8346061623456;

[0091] The transmission ratio curve obtained from the overall C2-order continuous transmission ratio curve is as follows: figure 2 shown.

[0092] Finally, the main parameters of the rack are obtained:

[0093] Number of teeth Z=4;

[0094] Pressure angle α=22°;

[0095] Addendum height 22;

[0096] Addendum width 5.3;

[0...

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Abstract

The invention discloses a design method of an automobile steering device gear sector and rack pair. The design method is characterized by comprising the following steps that initial parameters of the automobile steering device gear sector and rack pair are determined, wherein the parameters comprise the minimum transmission ratio, the maximum transmission ratio and gear sector corner values of a first adaptor point, a second adaptor point, a third adaptor point and a fourth adaptor point of a variable speed ratio curve; an integral C2-order continuous variable speed ratio curve model is established; undetermined parameters of the integral C2-order continuous variable speed ratio curve model are determined, and integral C2-order continuous variable speed ratio curves are obtained; one or more of six input parameters is / are adjusted according to the obtained integral C2-order continuous variable speed ratio curves, an integral C2-order continuous variable speed ratio curve meeting requirements is obtained, and the steering device gear sector and rack pair is designed according to the determined six input parameters. By means of the integral C2-order continuous variable speed ratio curve model and a model optimization design adjusting method, the ideal C2-order continuous variable speed ratio curve can be obtained, and design is easy and convenient.

Description

technical field [0001] The invention relates to the technical field of mechanical transmission, and relates to a rack and fan pair of an automobile steering gear, in particular to a design method for a rack and fan pair of an automobile steering gear. Background technique [0002] The steering performance of car driving depends on the speed ratio curve of the steering gear rack gear meshing. When driving straight at high speed, the transmission ratio is required to be small, and the steering wheel is "heavy". Changes are made through rack-and-pinion gearing, so designing an ideal gear ratio curve is critical. At present, most transmission ratio curves are composed of segmented straight segments, and there is a sharp point between the straight segment and the straight segment, so that the speed changes suddenly when turning, which is not smooth, and there is a speed impact. In recent years, segmented straight segments and cosine function curves have appeared. The transmissio...

Claims

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Application Information

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IPC IPC(8): F16H19/04B62D3/12
CPCB62D3/12F16H19/043
Inventor 丁国龙周国和王平江赵大兴王珍余金舫
Owner HUBEI UNIV OF TECH
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