Structural Design And Optimization Of Key Components Of Vehicle Seatbelt Receiver

Vehicle seat belt is the most important part of the vehicle safety restraint system.When passengers take the car in a safety accident,the seat belt will play a very good protective role.As the core part of the seat belt,the research on the locking,reliability and comfort of the coiler has a certain reference value for designers to improve the coiler.Consumers are demanding more and more comfort when they buy cars,so it is necessary to study how to reduce the instantaneous noise generated by the coiler when it works.In this paper,the sensitive locking performance of the body of the recoiler and the collision noise between the inductive pendulum wheel and the outer gear disc are studied.The relevant rules of lock performance are obtained,and the collision noise is reduced.Finally,the necessary analysis of the locking performance of the coiler,the noise problem of the inductive pendulum wheel,the torsion force of the torsion bar and the strength of the bracket are made by using the relevant auxiliary software.The specific work of this paper is as follows:(1)Composition and working principle analysis of coiler.The three-dimensional structure model of the coiler is established,and the structure coordination relationship of each component of the coiler is analyzed in detail.This paper analyses in detail the working principle of the tension winding of the winder's ribbon,the locking principle of the winder's ribbon sensitive device,the locking principle of the winder's body sensitive device,and the working principle of the winder's torsion limit rod.The research shows that the principle of ribbon sensitive locking and the principle of body sensitive locking are independent and interrelated.(2)Motion Analysis of Sensitive Locking Device for Car Body.Based on the geometric relationship and motion constraints between the sensitive locking components,the kinematic mathematical model is established,and the relationship between the slot inclination of the car seat and the locking acceleration and locking time is obtained.The comparative analysis is carried out by using Adams software simulation,which shows that the longer the slot inclination of the car seat is,the longer the locking time is.The relationship between groove inclination and lock-in acceleration is fitted by quadratic polynomial with MATLAB,and the relationship curve and the corresponding formula are obtained,which provides a theoretical reference for researchers in the design of sensory seat.(3)Noise reduction analysis of contact between inductive pendulum wheel and external teeth disc.The collision model between the inductive pendulum wheel and the external teeth disk is established by using ABAQUS.By collision analysis,the simulation size of the contact force between the external teeth disk and the inductive pendulum wheel can be obtained.Then the impact analysis of the modified pendulum wheel and the external tooth disk is carried out again.The contact force is reduced from 1.52 N to 1.2N.The contact force is used as the exciting force.The collision noise of the pendulum wheel and the external tooth disk is analyzed by using the time domain boundary element method of Virtual lab.The sound pressure cloud map and the sound pressure curve at the field point of the boundary element field grid in time domain are obtained.Then the modified model is used to analyze the sound pressure.The maximum noise is reduced from 92 dB to81 dB.(4)CAE and experimental analysis of other core components.The working principle of the torsion bar is analyzed and tested.The strength of the coiler bracket is analyzed by CAE,and the stress concentration area is modified to meet the structural strength requirements of the coiler bracket.