電動葫蘆是一(yi)種起重(zhong)量(liang)較小，結構簡單的(de)(de)起重(zhong)機構，它(ta)用于(yu)工礦企業中進行(xing)小型設備(bei)的(de)(de)吊運、安裝與修理工作；由(you)于(yu)其體積小，占(zhan)用廠房面積較少(shao)，使用靈活方便(bian)。

目前生產的CD型鋼絲繩電動葫蘆起重量分(fen)別為(wei)0.5、1t、2t、3t、5t、10t。該(gai)系(xi)列產(chan)品均采用ZZ型(xing)錐(zhui)形(xing)(xing)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)，即轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)與定(ding)于(yu)呈錐(zhui)形(xing)(xing)，其結構如圖7-3所示。當(dang)(dang)錠(ding)子(zi)(zi)通電(dian)(dian)(dian)(dian)后，產(chan)生(sheng)(sheng)(sheng)磁場，磁力(li)線垂直于(yu)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)表面(mian)(mian)，于(yu)是產(chan)生(sheng)(sheng)(sheng)一個軸(zhou)向分(fen)力(li)，使轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)3客(ke)服(fu)彈簧(huang)力(li)，向錐(zhui)形(xing)(xing)小端方向軸(zhou)向移(yi)動(dong)(dong)(dong)(dong)(dong)，轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)被吸(xi)(xi)進定(ding)子(zi)(zi)，并使錐(zhui)形(xing)(xing)制(zhi)動(dong)(dong)(dong)(dong)(dong)器7脫離(li)后蓋(gai)6，允許(xu)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)自(zi)由轉(zhuan)(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)(dong)(dong)。當(dang)(dang)初斷電(dian)(dian)(dian)(dian)源時，在被壓縮彈簧(huang)4的作用下(xia)，轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)向方向軸(zhou)向移(yi)動(dong)(dong)(dong)(dong)(dong)，使錐(zhui)形(xing)(xing)制(zhi)動(dong)(dong)(dong)(dong)(dong)圈(quan)(quan)緊(jin)剎于(yu)后蓋(gai)上，實現轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)停車制(zhi)動(dong)(dong)(dong)(dong)(dong)。                                                                                                                                                                           錐(zhui)形(xing)(xing)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)制(zhi)造工藝較為(wei)發(fa)雜。一些工廠常采用磅磁式(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)來代(dai)替錐(zhui)形(xing)(xing)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)。磅磁式(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)和錠(ding)子(zi)(zi)都是普(pu)通圓柱形(xing)(xing)，在轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)端面(mian)(mian)裝有磁板環（即銜鐵盤(pan)），當(dang)(dang)電(dian)(dian)(dian)(dian)流接通后，瓷板環與磁盤(pan)圈(quan)(quan)（即制(zhi)動(dong)(dong)(dong)(dong)(dong)器）相互吸(xi)(xi)引(yin)產(chan)生(sheng)(sheng)(sheng)軸(zhou)向拉(la)力(li)，克服(fu)彈簧(huang)阻(zu)力(li)，使錐(zhui)形(xing)(xing)制(zhi)動(dong)(dong)(dong)(dong)(dong)圈(quan)(quan)和后蓋(gai)分(fen)開，電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)的轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)可(ke)自(zi)行(xing)運轉(zhuan)(zhuan)(zhuan)(zhuan)，不(bu)受制(zhi)動(dong)(dong)(dong)(dong)(dong)；斷電(dian)(dian)(dian)(dian)后錐(zhui)形(xing)(xing)制(zhi)動(dong)(dong)(dong)(dong)(dong)圈(quan)(quan)在彈簧(huang)的作用下(xia)，與后蓋(gai)緊(jin)合對(dui)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)進行(xing)制(zhi)動(dong)(dong)(dong)(dong)(dong)。