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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