起升電機
、卷juan筒tong裝zhuang置zhi和he減jian速su器qi呈cheng串chuan聯lian型xing布bu置zhi，外wai觀guan呈cheng圓yuan形xing或huo方fang形xing，具ju有you垂chui直zhi升sheng降jiang和he運yun行xing功gong能neng，起qi升sheng速su度du分fen單dan速su或huo雙shuang速su。雙shuang速su型xing是shi在zai單dan速su型xing的de基ji礎chu上shang

，增zeng加jia了le一yi套tao由you慢man速su電dian機ji和he減jian速su器qi組zu成cheng的de慢man速su驅qu動dong裝zhuang置zhi
，其qi與yu快kuai速su之zhi速su比bi為wei10:1。快kuai速su電dian機ji工gong作zuo時shi，慢man速su驅qu動dong裝zhuang置zhi不bu動dong
，電dian動dong葫hu蘆lu快kuai速su升sheng降jiang。慢man速su電dian機ji工gong作zuo時shi，通tong過guo慢man速su驅qu動dong裝zhuang置zhi帶dai動dong主zhu起qi升sheng電dian機ji錐zhui形xing轉zhuan子zi旋xuan轉zhuan，電dian動dong葫hu蘆lu慢man速su升sheng降jiang。