(?) (?)鼓(Gu)式(Shi)制(Zhi)动(Dong)器(Qi)是(Shi)利(Li)用(Yong)制(Zhi)动(Dong)传(Chuan)动(Dong)机(Ji)构(Gou)使(Shi)制(Zhi)动(Dong)蹄(Ti)将(Jiang)制(Zhi)动(Dong)摩(Mo)擦(Ca)片(Pian)压(Ya)紧(Jin)在(Zai)制(Zhi)动(Dong)鼓(Gu)内(Nei)侧(Ce)，(?)从(Cong)而(?)产(Chan)生(Sheng)制(Zhi)动(Dong)力(Li)，(?)根(Gen)据(Ju)需(Xu)要(Yao)使(Shi)车(Che)轮(Lun)减(Jian)速(Su)或(Huo)在(Zai)短(Duan)的(De)距(Ju)离(Li)内(Nei)停(Ting)车(Che)，(?)以(Yi)确(Que)保(Bao)行(Xing)车(Che)安(An)全(Quan)，(?)并(Bing)保(Bao)障(Zhang)汽(Qi)车(Che)停(Ting)放(Fang)可(Ke)靠(Kao)不(Bu)能(Neng)自(Zi)动(Dong)滑(Hua)移(Yi)。(?)
(?) (?)鼓(Gu)式(Shi)制(Zhi)动(Dong)器(Qi)也(Ye)叫(Jiao)块(Kuai)式(Shi)制(Zhi)动(Dong)器(Qi)，(?)是(Shi)靠(Kao)制(Zhi)动(Dong)块(Kuai)在(Zai)制(Zhi)动(Dong)轮(Lun)上(Shang)压(Ya)紧(Jin)来(Lai)实(Shi)现(Xian)刹(Sha)车(Che)的(De)。(?)鼓(Gu)式(Shi)制(Zhi)动(Dong)是(Shi)早(Zao)期(Qi)设(She)计(Ji)的(De)制(Zhi)动(Dong)系(Xi)统(Tong)，(?)其(Qi)刹(Sha)车(Che)鼓(Gu)的(De)设(She)计(Ji)1902年(Nian)就(Jiu)已(Yi)经(Jing)使(Shi)用(Yong)在(Zai)马(Ma)车(Che)上(Shang)了(Liao)，(?)直(Zhi)到(Dao)1920年(Nian)左(Zuo)右(You)才(Cai)开(Kai)始(Shi)在(Zai)汽(Qi)车(Che)工(Gong)业(Ye)广(Guang)泛(Fan)应(Ying)用(Yong)。(?)鼓(Gu)式(Shi)制(Zhi)动(Dong)器(Qi)的(De)主(Zhu)流(Liu)是(Shi)内(Nei)张(Zhang)式(Shi)，(?)它(Ta)的(De)制(Zhi)动(Dong)块(Kuai)(刹(Sha)车(Che)蹄(Ti))位(Wei)于(Yu)制(Zhi)动(Dong)轮(Lun)内(Nei)侧(Ce)，(?)在(Zai)刹(Sha)车(Che)的(De)时(Shi)候(Hou)制(Zhi)动(Dong)块(Kuai)向(Xiang)外(Wai)张(Zhang)开(Kai)，(?)摩(Mo)擦(Ca)制(Zhi)动(Dong)轮(Lun)的(De)内(Nei)侧(Ce)，(?)达(Da)到(Dao)刹(Sha)车(Che)的(De)目(Mu)的(De)。(?)近(Jin)三(San)十(Shi)年(Nian)中(Zhong)，(?)鼓(Gu)式(Shi)制(Zhi)动(Dong)器(Qi)在(Zai)轿(Jiao)车(Che)领(Ling)域(Yu)上(Shang)已(Yi)经(Jing)逐(Zhu)步(Bu)退(Tui)出(Chu)让(Rang)位(Wei)给(Gei)盘(Pan)式(Shi)制(Zhi)动(Dong)器(Qi)。(?)但(Dan)由(You)于(Yu)成(Cheng)本(Ben)比(Bi)较(Jiao)低(Di)，(?)仍(Reng)然(Ran)在(Zai)一(Yi)些(Xie)经(Jing)济(Ji)类(Lei)轿(Jiao)车(Che)中(Zhong)使(Shi)用(Yong)，(?)主(Zhu)要(Yao)用(Yong)于(Yu)制(Zhi)动(Dong)负(Fu)荷(He)比(Bi)较(Jiao)小(Xiao)的(De)后(Hou)轮(Lun)和(He)驻(Zhu)车(Che)制(Zhi)动(Dong)。(?)
