驻车丝杆副弹簧刚度分析

Stiffness Analysis of the Parking Screw Pair Spring

对车用滚珠丝杆弹簧进行刚度试验研究,在驻车卡钳内,过大行程-载荷下会导致丝杆副内部弹簧发生塑性变形,最终导致设备失效。针对这一问题,首先运用理论计算,发现弹簧的设计压缩量不能满足实际工况的要求,需根据轴向刚度公式,重新调整参数;然后利用Solidworks数字化建模软件创建了调节弹簧结构的分析模型,基于ANSYS有限元分析软件对弹簧刚度-载荷变形进行了分析试验,发现弹簧压并圈与有效圈的过渡区域是发生应力应变的集中区域,提高弹簧刚度值可以有效抵抗塑性变形;最后通过MGU试验电机对实际工况进行模拟试验,进一步验证了刚度参数对塑性变形的影响机理。

The rigidity test of the ball screw spring for vehicles is carried out.In the parking caliper,under the large stroke-load,the internal spring of the screw pair will plastically deform,and eventually the system will fail.In this regard,the theoretical calculation was used to confirm that the spring design compression cannot meet the required compression under actual working conditions.According to the axial stiffness formula,readjust the parameters to meet the requirements of actual operating conditions.The structural analysis model of the adjusting spring was created by using Solidworks digital modeling software,and the spring stiffness-load deformation was based on ANSYS finite element analysis software.An analysis test was conducted,and the transition area between the spring compression ring and the effective ring was proposed as the concentrated area where stress and strain occurred,increasing the spring stiffness value can effectively resist plastic deformation.Finally,the MGU test motor was used to simulate the actual working conditions to further verify the analysis of the stiffness parameters and deformation.