Evaluation method for the gap between linear roller joints of automobile seat guide rails

Abstract

The invention relates to an evaluation method of a car seat guide rail linear roller combination part clearance. The evaluation method is achieved based on finite element dynamics simulation. According to the evaluation method of the car seat guide rail linear roller combination part clearance, the premise is to build a finite element model of a seat guide rail. In the finite element model, a spring damping unit is used for representing the contact relation between a steel ball and an inner rail and the contact relation between the steel ball and an outer rail. Therefore, the characteristic that the steel ball and the inner wall of the guide rail are sometimes compressed and sometimes separated under the random road excitation action is shown by the relative displacement between two end points of the spring damping unit. Statistical analysis is carried out on the relative displacement between the two end points of the spring damping unit, a proper clearance discreet value is given, and therefore clearances can be reduced to a large degree by pre-pressing the discreet value in the guide rail assembling process, that is, the vibration and noise problem of the seat guide rail is effectively solved.

Description

technical field [0001] The invention relates to a clearance evaluation method for linear roller joints of automobile seat guide rails, in particular to a clearance evaluation method for linear roller joints of automobile seat guide rails based on finite element analysis. Background technique [0002] The car seat guide rail is the connection between the car seat and the body. If the guide rail produces obvious noise during the driving of the vehicle or the sliding process of the seat, it will give passengers a bad impression of the quality of the vehicle. The passenger experience has been increasingly valued by manufacturers, so it is of practical significance to solve the problem of abnormal sound of car seat rails. The car seat guide rail is mainly composed of inner rail, outer rail, steel ball, cage, tongue, etc. The dynamic characteristics of the joint between the inner steel ball of the guide rail and the inner and outer rails is one of the main sources of vibration and...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a method for evaluating the gap between the linear roller joint of the car seat guide rail, solve the problem that the gap between the inner and outer rails and the steel ball is a random value due to the random excitation of the road surface, and explore the change of the gap The situation is very difficult, and it is impossible to give a reasonable assembly preload guidance value, and it is impossible to solve problems such as abnormal sound of car seat guide rails.

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