滚珠丝杠舵机传动机构形式分析研究

Study on Transmission Mechanism of Ball Screw Actuator

关键词:  舵机  滚珠丝杠  传动机构

Key words:  Actuator  Ball screw  Transmission mechanism

摘要:

针对滚珠丝杠舵机常用的曲柄滑块和拨叉两种传动机构形式,对舵机的减速比和间隙特性进行对比分析研究。拨叉舵机的减速比波动较小,在0°时为最小值,两边呈现对称状态,而曲柄滑块舵机的减速比为不对称状态。曲柄滑块舵机比拨叉舵机产生间隙的环节较多,但间隙易于控制,而拨叉舵机由于结构磨损产生的间隙增大现象较为明显。

Abstract:

Aiming at two common mechanisms of ball screw actuator for crankslider and shifting fork transmission, the paper gives contrast analysis of the speeddown ratio and system clearance of actuatorIn terms of speeddown ratio, the speeddown ratio of shifting fork actuator fluctuates less, which becomes the minimum and symmetric at 0°While crankslider actuators speeddown ratio doesnt have symmetry characteristicCompared with shifting fork actuator, crankslider actuator has more points contributing to system clearance, but it could be controlled easilyHowever, because of mechanic structure wear, the system clearance of shifting fork actuator increases more obviously.