【摘要】 针对鸭嘴型端子多次插拔循环后易磨损，弹臂间隙、接触电阻和电流循环温升增大等问题，采用理论分析与室内端子插拔循环单因素试验相结合的方法，探究了不同插拔循环时端子弹臂长度对端子插拔力学特性及电接触性能的影响。结果表明：减小弹臂长度能够提高不同插拔循环次数时插拔力、弹臂最小间隙的变化量、表面粗糙度变化量，显著降低鸭嘴型端子的接触电阻(p<0.05)。当弹臂长度L较小的端子(≤3.3 mm)插拔循环100次时，接触电阻比初始电阻产生显著增加，但其仍显著低于L≥4.3 mm端子；L≥3.8 mm端子在500次循环后接触电阻产生不同程度增加；弹臂长度越大，接触电阻随插拔次数增加越缓慢。弹臂长度较大时磨损量和弹臂间隙较小，而接触电阻增大，表明弹臂长度对端子接触电阻的影响大于弹臂间隙和表面粗糙度。为提升多次插拔循环后鸭嘴型端子间的插拔力、降低接触电阻，可适当减小端子弹臂长度(L≤3.3 mm)。更多还原

【Abstract】 Duckbill terminals often degrade after multiple mating cycles. Key issues include significant wear,enlarged blade gap, higher contact resistance, and elevated temperature rise. This study combines theoretical analysis with indoor single-factor tests to examine how terminal spring arm( TSA) length(L) affects mechanical and electrical performance over multiple mating cycles. Results show that reducing theLamplifies changes in plug force, minimum gap of the spring arm, and surface roughness under different cycles.However, it also significantly reduces contact resistance(p<0.05). Terminals withL≤3.3 mm showed a noticeable resistance increase after 100 cycles. Still, their resistance remained much lower than those with L≥4.3 mm. After 500 cycles, terminals withL≥3.8 mm exhibited increased contact resistance. A longer TSA led to a slower rise in resistance over cycles. Although longer TSAs reduced wear and spring arm gap, contact resistance was higher. This indicates that TSA length affects contact resistance more than spring arm gap or surface roughness. To enhance plug force and maintain low contact resistance after multiple mating cycles of duckbill terminals, it is advisable to use a shorter TSA length—preferablyL≤3.3 mm.更多还原