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Measuring method of inclination angle and caster angle of wheel kingpin

A measurement method and technology of caster angle, which are applied in wheel testing, angle/taper measurement, measurement device, etc., can solve the problem that the measurement of wheel alignment parameters is still blank, etc., and achieve the effect of significant cost advantage.

Inactive Publication Date: 2017-02-08
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Measurement of wheel alignment parameters for quarter suspensions is currently blank

Method used

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  • Measuring method of inclination angle and caster angle of wheel kingpin
  • Measuring method of inclination angle and caster angle of wheel kingpin
  • Measuring method of inclination angle and caster angle of wheel kingpin

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Experimental program
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Effect test

Embodiment

[0018] like figure 1 As shown, a method for measuring wheel kingpin inclination and caster angle comprises the following steps:

[0019] 1) Fix the quarter suspension of the car on the measuring device, and measure the coordinates B(X1, Y1, Z1) and C( X2, Y2, Z2). The above cantilever is taken as an example, its simplified structure is as follows figure 1 As shown, where B and C are the connection points with the body, A is the connection point between the quarter suspension and the steering knuckle, B' and C' are the connection points of B and C between the quarter suspension and the steering knuckle Projection point on the horizontal plane.

[0020] 2) Use a level measuring instrument to measure the angle between the suspension rod of the upper cross arm and the horizontal plane, which is figure 1 ∠1 and ∠2 in .

[0021] 3) at figure 2 A horizontal coordinate system is established in , and the coordinates of the upper fulcrum of the wheel kingpin are calculated accord...

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Abstract

The invention relates to a wheel kingpin inclination and caster measurement method, which comprises the following steps: (1) a 1 / 4 suspension of a car is fixed on a measurement device and a level ruler and a vertical ruler are adopted for measuring coordinates of two connection points of the upper transverse arm of the suspension and the car body; (2) a level measuring instrument is adopted for measuring the included angle between the suspension rod of the upper transverse arm and the level plane; (3) wheel kingpin upper supporting point coordinates are calculated according to the coordinates of the two connection points of the upper transverse arm and the car body and the included angle between the suspension rod and the level plane; (4) according to the first step to the third step, coordinates of two connection points of the lower transverse arm of the suspension and the car body are measured, the included angle between the suspension rod of the lower transverse arm and the level plane are measured, and wheel kingpin lower supporting point coordinates are calculated; and (5) according to the kingpin upper supporting point coordinates and the kingpin lower supporting point coordinates, the kingpin inclination and the caster are obtained. Compared with the prior art, through independently measuring the 1 / 4 suspension, the kingpin inclination and the caster are dynamically measured, and the cost is low.

Description

technical field [0001] The invention relates to the field of vehicle parameter detection, in particular to a method for measuring the inclination angle and the caster angle of a wheel kingpin. Background technique [0002] With the rapid development of the automobile industry in China, more and more automobile factories have begun to pay attention to the local research and development of automobiles, and the wheel alignment parameters are undoubtedly the core of automobile stability in the development of complete vehicles. The so-called wheel alignment means that each wheel, steering knuckle and axle of the car should be installed in a certain relative position with the vehicle frame. The wheel alignment parameters generally include caster, kingpin inclination, wheel camber, and toe-in. parameters. Reasonable wheel positioning parameters maintain the stability of the car in a straight line, ensure that the car turns lightly when turning, and makes the steering wheel automat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/24G01M17/013G01B21/22
Inventor 左曙光黄鹏段向雷吴旭东
Owner TONGJI UNIV
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