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Aiming at the problem of speed fluctuation caused by the hard dot arrangement of the automobile double cross shaft universal joint steering system,the layout of hard spot how to ensure universal constant velocity transmission is studied,and taking the double cross shaft universal joint transmission structural optimization of a car as example,by using ADAMS / view software,the parametric dynamics model of double cross shaft universal joint transmission mechanism is built.Taking the variable in structure as design variable,taking the interaxial angle between intermediate shaft and the input shaft,the output shaft is not less than 155° as constraint condition,taking the angular difference of interaxial angle between intermediate shaft and the driving,driven shaft as the optimization target,and setting the steering intermediate shaft phase angle,the best hard spot layout program of double cross shaft universal joint steering system is acquired,and the steering transmission without fluctuation.

Aiming at the problem of automobile steering design with a double cross shaft universal joint transmission,by spatial layout design to achieve a smooth speed output shaft is studied.Taking a vehicle steering system as an example,the dynamics model of ADAMS/view double cross universal joint is established,with the output shaft of the speed fluctuation rate as the optimization objective,optimization design of the parameters can be changed in the system is carried out,finally,the ideal steering hard point layout scheme is got.