機(jī)械式轉(zhuǎn)向系由轉(zhuǎn)向操縱機(jī)構(gòu)、轉(zhuǎn)向器、轉(zhuǎn)向傳動機(jī)構(gòu)三部分組成,具體組成包括:轉(zhuǎn)向盤、轉(zhuǎn)向軸、萬向節(jié)、轉(zhuǎn)向器、轉(zhuǎn)向搖臂、轉(zhuǎn)向直拉桿、轉(zhuǎn)向橫拉桿、轉(zhuǎn)向節(jié)臂、轉(zhuǎn)向節(jié)、梯形臂。汽車轉(zhuǎn)向時,駕駛員根據(jù)需要轉(zhuǎn)動方向盤,通過轉(zhuǎn)向軸將旋轉(zhuǎn)動作傳遞給萬向節(jié)和轉(zhuǎn)向器,轉(zhuǎn)向器有許多結(jié)構(gòu)(循環(huán)球、渦渦輪渦桿等),負(fù)責(zé)將旋轉(zhuǎn)動作轉(zhuǎn)換為轉(zhuǎn)向搖臂的擺動,帶動轉(zhuǎn)向直拉桿、轉(zhuǎn)向節(jié)臂和轉(zhuǎn)向節(jié)動作,由于轉(zhuǎn)向節(jié)和轉(zhuǎn)向節(jié)臂通過轉(zhuǎn)向軸固定在車架上,此運(yùn)動使得轉(zhuǎn)向節(jié)相對車架產(chǎn)生轉(zhuǎn)動,固定在轉(zhuǎn)向節(jié)上的車輪發(fā)生轉(zhuǎn)向偏移,完成轉(zhuǎn)向動作。