Method for determining position of back door hinge shaft

Abstract

The invention relates to a method for determining the position of a back door hinge shaft, and the method comprises the steps: determining initial coordinates (X0, Y0 and Z0) of the back door hinge shaft based on a rear modeling CAS surface, a back door hinge span condition and a static gap condition of a back door and a top cover; determining an initial coordinate of a back door lock based on the height of the back door threshold and the ground line; determining the maximum opening degree of the back door based on the back door ground clearance and the back door inner buckle ground clearance; adjusting and checking the performance index of the gas spring so that the gas spring can meet the back door maneuverability requirement; obtaining constraint conditions based on the cross-sectional diagram at the Y0 position of the back door and the cross-sectional diagram of the hinge; and in combination with the target function and the constraint condition, iteratively solving the abscissa X1 and the ordinate Z1 of the hinge shaft when the target function obtains the maximum value, and obtaining the position (X1, Y0, Z1) of the back door hinge shaft. The problems of long time consumption and low efficiency of determining the position of the hinge shaft in related technologies can be solved.

Description

technical field [0001] The present application relates to the technical field of auto parts, in particular to a method for determining the position of a hinge axis of a rear door. Background technique [0002] The hinge of the back door is a basic retainer commonly used in the opening and closing mechanism system of the hatchback, and the arrangement of the hinge axis is the basis for the layout and motion analysis of the entire back door system. The feasibility of the layout method, that is, the efficiency and accuracy of calculating the position of the hinge axis of the back door directly affects the layout and development efficiency of the entire back door system, and even has a greater impact on the structural rigidity, rear shape, and joints of the entire back door. influences. [0003] Usually rely on conventional rear door-related inspection items for layout, after obtaining the hinge position of the first version, output the motion envelope of the rear door to the b...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a method for determining the position of the hinge axis of the back door, so as to solve the problems of long time-consuming and low efficiency in determining the position of the hinge axis in the related art

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