電(dian)動葫蘆是一種起(qi)重(zhong)量較(jiao)小，結構(gou)簡單的起(qi)重(zhong)機構(gou)，它用(yong)于工礦企業中(zhong)進行小型設備的吊(diao)運(yun)、安裝與修理工作(zuo)；由(you)于其體積小，占用(yong)廠(chang)房(fang)面積較(jiao)少(shao)，使(shi)用(yong)靈活(huo)方便。

目前生產的CD型鋼絲繩電動葫蘆起重(zhong)量(liang)分別為0.5、1t、2t、3t、5t、10t。該系(xi)列產(chan)(chan)品均采用ZZ型錐形(xing)(xing)轉(zhuan)(zhuan)子(zi)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)，即轉(zhuan)(zhuan)子(zi)與定(ding)于呈錐形(xing)(xing)，其(qi)結構如圖(tu)7-3所示(shi)。當錠子(zi)通(tong)電(dian)(dian)(dian)(dian)(dian)后(hou)(hou)，產(chan)(chan)生磁(ci)場，磁(ci)力(li)線垂直(zhi)于轉(zhuan)(zhuan)子(zi)表面，于是產(chan)(chan)生一個軸向分力(li)，使轉(zhuan)(zhuan)子(zi)3客服彈(dan)(dan)簧(huang)力(li)，向錐形(xing)(xing)小端方(fang)向軸向移動(dong)，轉(zhuan)(zhuan)子(zi)被吸進(jin)定(ding)子(zi)，并使錐形(xing)(xing)制(zhi)(zhi)(zhi)動(dong)器(qi)7脫(tuo)離(li)后(hou)(hou)蓋(gai)6，允(yun)許轉(zhuan)(zhuan)子(zi)自(zi)由轉(zhuan)(zhuan)動(dong)。當初斷(duan)電(dian)(dian)(dian)(dian)(dian)源時，在(zai)被壓縮彈(dan)(dan)簧(huang)4的(de)作用下，轉(zhuan)(zhuan)子(zi)向方(fang)向軸向移動(dong)，使錐形(xing)(xing)制(zhi)(zhi)(zhi)動(dong)圈(quan)(quan)(quan)緊剎于后(hou)(hou)蓋(gai)上(shang)，實現轉(zhuan)(zhuan)子(zi)停車制(zhi)(zhi)(zhi)動(dong)。                                                                                                                                                                           錐形(xing)(xing)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)制(zhi)(zhi)(zhi)造(zao)工藝較為發雜。一些(xie)工廠常采用磅磁(ci)式電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)來代替(ti)錐形(xing)(xing)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)。磅磁(ci)式電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)轉(zhuan)(zhuan)子(zi)和錠子(zi)都是普通(tong)圓柱(zhu)形(xing)(xing)，在(zai)轉(zhuan)(zhuan)子(zi)端面裝有磁(ci)板環(huan)（即銜(xian)鐵盤），當電(dian)(dian)(dian)(dian)(dian)流接通(tong)后(hou)(hou)，瓷板環(huan)與磁(ci)盤圈(quan)(quan)(quan)（即制(zhi)(zhi)(zhi)動(dong)器(qi)）相(xiang)互(hu)吸引產(chan)(chan)生軸向拉力(li)，克(ke)服彈(dan)(dan)簧(huang)阻(zu)力(li)，使錐形(xing)(xing)制(zhi)(zhi)(zhi)動(dong)圈(quan)(quan)(quan)和后(hou)(hou)蓋(gai)分開，電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)的(de)轉(zhuan)(zhuan)子(zi)可自(zi)行(xing)運轉(zhuan)(zhuan)，不受(shou)制(zhi)(zhi)(zhi)動(dong)；斷(duan)電(dian)(dian)(dian)(dian)(dian)后(hou)(hou)錐形(xing)(xing)制(zhi)(zhi)(zhi)動(dong)圈(quan)(quan)(quan)在(zai)彈(dan)(dan)簧(huang)的(de)作用下，與后(hou)(hou)蓋(gai)緊合對電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)進(jin)行(xing)制(zhi)(zhi)(zhi)動(dong)。