它由液壓控製,主要零部件有製動盤、分泵、製動鉗、油you管guan等deng。製zhi動dong盤pan用yong合he金jin鋼gang製zhi造zao並bing固gu定ding在zai車che輪lun上shang,隨sui車che輪lun轉zhuan動dong。分fen泵beng固gu定ding在zai製zhi動dong器qi的de底di板ban上shang固gu定ding不bu動dong。製zhi動dong鉗qian上shang的de兩liang個ge摩mo擦ca片pian分fen別bie裝zhuang在zai製zhi動dong盤pan的de兩liang側ce。分fen泵beng的de活huo塞sai受shou油you管guan輸shu送song來lai的de液ye壓ya作zuo用yong,推tui動dong摩mo擦ca片pian壓ya向xiang製zhi動dong盤pan發fa生sheng摩mo擦ca製zhi動dong,動dong作zuo起qi來lai**好象用鉗子鉗住旋轉中的盤子,迫使它停下來一樣。
這(zhe)種(zhong)製(zhi)動(dong)器(qi)散(san)熱(re)快(kuai),重(zhong)量(liang)輕(qing),構(gou)造(zao)簡(jian)單(dan),調(tiao)整(zheng)方(fang)便(bian)。特(te)別(bie)是(shi)高(gao)負(fu)載(zai)時(shi)耐(nai)高(gao)溫(wen)性(xing)能(neng)好(hao),製(zhi)動(dong)效(xiao)果(guo)穩(wen)定(ding),而(er)且(qie)不(bu)怕(pa)泥(ni)水(shui)侵(qin)襲(xi),在(zai)冬(dong)季(ji)和(he)惡(e)劣(lie)路(lu)況(kuang)下(xia)行(xing)車(che),盤(pan)式(shi)製(zhi)動(dong)比(bi)鼓(gu)式(shi)製(zhi)動(dong)更(geng)容(rong)易(yi)在(zai)較(jiao)短(duan)的(de)時(shi)間(jian)內(nei)令(ling)車(che)停(ting)下(xia)。有(you)些(xie)盤(pan)式(shi)製(zhi)動(dong)器(qi)的(de)製(zhi)動(dong)盤(pan)上(shang)還(hai)開(kai)了(le)許(xu)多(duo)小(xiao)孔(kong),加(jia)速(su)通(tong)風(feng)散(san)熱(re)提(ti)高(gao)製(zhi)動(dong)效(xiao)率(lv)。反(fan)觀(guan)鼓(gu)式(shi)製(zhi)動(dong)器(qi),由(you)於(yu)散(san)熱(re)性(xing)能(neng)差(cha),在(zai)製(zhi)動(dong)過(guo)程(cheng)中(zhong)會(hui)**大量的熱量。製動蹄片和輪鼓在高溫影響下較易發生極為複雜的變形,容易產生製動衰退和振抖現象,引起製動效率下降。 
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