千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)按結構(gou)特征可分為齒條千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)、螺(luo)旋(xuan)千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)和液(ye)壓(ya)（油壓(ya)）千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)三種。按其他方式可分為分離(li)式千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)、臥式千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)、爪式千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)、同步千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)、油壓(ya)千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)、電(dian)動(dong)千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)等。其中常(chang)用的千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)有螺(luo)旋(xuan)千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)、液(ye)壓(ya)千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)、電(dian)動(dong)千(qian)(qian)(qian)斤(jin)(jin)(jin)(jin)頂(ding)(ding)(ding)等。

(1)螺(luo)旋千(qian)斤頂(ding)(ding)。螺(luo)旋千(qian)斤頂(ding)(ding)的螺(luo)紋(wen)無自鎖(suo)作用，裝有(you)制動器。放松制動器，重(zhong)物(wu)(wu)即可自行下(xia)降(jiang)，縮短返(fan)程時間，但這(zhe)種千(qian)斤頂(ding)(ding)構造較復雜。螺(luo)旋千(qian)斤頂(ding)(ding)能長(chang)期支持重(zhong)物(wu)(wu)，起重(zhong)量已(yi)達100 t，應用較廣。下(xia)部裝上水平螺(luo)桿后，還能使重(zhong)物(wu)(wu)做(zuo)小距離橫移(yi)。

(2)液(ye)壓千斤頂。用(yong)(yong)于液(ye)壓傳動系統中作中間介質，起(qi)傳遞和(he)轉換能量作用(yong)(yong)，用(yong)(yong)時還起(qi)著液(ye)壓系統內各部件問的潤(run)滑、、冷卻(que)、沖洗(xi)等(deng)作用(yong)(yong)。

(3)電(dian)動千斤(jin)頂(ding)。千斤(jin)頂(ding)內部裝(zhuang)(zhuang)有(you)保壓(ya)裝(zhuang)(zhuang)置(zhi)(zhi)，防止超壓(ya)，如果超壓(ya)，千斤(jin)頂(ding)就會回不到(dao)位(wei)置(zhi)(zhi)，結(jie)構對(dui)千斤(jin)頂(ding)能(neng)起(qi)到(dao)雙重保護作(zuo)用，下(xia)斤(jin)項裝(zhuang)(zhuang)上俯沖裝(zhuang)(zhuang)置(zhi)(zhi)后，可實現低高度達到(dao)高行(xing)程的目的。