【正文】 av ──汽車(chē)制動(dòng)時(shí)的初速度，可 取 av =20m/s β ──汽車(chē)制動(dòng)器制動(dòng)力分配系數(shù)。 強(qiáng)度校核 在計(jì)算制動(dòng)塊的摩擦力后，可求得連接支架與轉(zhuǎn)向橋螺栓的剪切應(yīng)力 上海工程技術(shù)大學(xué)畢業(yè)設(shè)計(jì)（論文） 轎車(chē)盤(pán)式制動(dòng)器結(jié)構(gòu)設(shè)計(jì) 32 ? ?22F 2 f N 4 5 9 8 3 .5 4= = = = 7 6 .2 2 M Pa 1 6 0 M Pa3 .1 4 1 0 0d n d42???? ? ??? 式中： f──支架所受的力； n──螺栓的數(shù)量，此處 n=2； d──螺栓的直徑。 制動(dòng)盤(pán)的材料為珠光體灰鑄鐵，制動(dòng)鉗的材料為可鍛鑄鐵，制動(dòng)塊由背板和摩擦成塊組成，現(xiàn)在的摩擦材料主要以石棉纖維為主并與樹(shù)脂粘合劑、調(diào)整摩擦性能的填充劑與噪音消除劑等混合。 三維模擬圖（ 2）制動(dòng)活塞 六、結(jié)束語(yǔ) 本次設(shè)計(jì)的主要內(nèi)容 是 轎車(chē) 制動(dòng)器 結(jié)構(gòu)設(shè)計(jì)。但 在此設(shè)計(jì)期間， 雖相關(guān)參數(shù)計(jì)算和驗(yàn)證比較全面，但是因?yàn)闆](méi)有進(jìn)行實(shí)物加工和驗(yàn)證，可能在實(shí)際應(yīng)用過(guò)程中還需要進(jìn)一步地 驗(yàn)證和調(diào)試。 上海工程技術(shù)大學(xué)畢業(yè)設(shè)計(jì)（論文） 轎車(chē)盤(pán)式制動(dòng)器結(jié)構(gòu)設(shè)計(jì) 33 參考文獻(xiàn) [1]劉維信 .汽車(chē) 制動(dòng)系的結(jié)構(gòu)設(shè)計(jì)與計(jì)算 [M]．北京：清華大學(xué)出版社 ,2020 [2]郭新華 .汽車(chē)構(gòu)造 （第二版） [M]．北京： 高等教育 出版社 ,2020 [3]王寶璽 ,賈慶祥 .汽車(chē)制造工藝學(xué)（第三版） [M].北京 :機(jī)械工業(yè)出版社 ,2020 [4]鐘毅芳 ,吳昌 林 ,唐增寶 .機(jī)械設(shè)計(jì)（第二版） [M]．武漢：華中科技大學(xué)出版社 ,2020 [5]余志生 .汽車(chē)?yán)碚摚ǖ谌妫?[M]．北京：機(jī)械工業(yè)出版社 ,2020 [6]王望予 .汽車(chē)設(shè)計(jì)（第 4 版） [M]．北京：機(jī)械工業(yè)出版社 ,2020 [7]徐灝 .機(jī)械設(shè)計(jì)手冊(cè) [M]．北京：機(jī)械工業(yè)出版社 ,1998 [8]朱龍根 .簡(jiǎn)明機(jī)械零件設(shè)計(jì)手冊(cè) [M]．北京：機(jī)械工業(yè)出版社 ,1997 [9]劉品 ,李哲 .機(jī)械精度設(shè)計(jì)與檢測(cè)基礎(chǔ) [M]． 哈爾濱：哈爾濱工業(yè)大學(xué)出版 ,2020 [10]Josef Adolfsson , Amos Ng , Petter Olofsg229。依維柯二代產(chǎn)品的駐車(chē)制動(dòng)裝置，是由駐車(chē)制動(dòng)機(jī)械操縱機(jī)構(gòu)與后鼓式制動(dòng)器組合而成。隨著后輪盤(pán)式制動(dòng)器的運(yùn)用，都靈 V 汽車(chē)的駐車(chē)制動(dòng)器將會(huì)隨著后輪制動(dòng)器動(dòng)形式而變化。 就盤(pán)式制動(dòng)器而言，存有帶駐車(chē)制動(dòng)結(jié)構(gòu)的盤(pán)式制動(dòng)器，其駐車(chē)制動(dòng)力也作用 在制動(dòng)盤(pán)兩側(cè)工作表面上，這種制動(dòng)器結(jié)構(gòu)復(fù)雜，可靠性相對(duì)稍差。使其駐車(chē)制動(dòng)力作用在制動(dòng)盤(pán)的內(nèi)鼓工作表面上，這樣使制動(dòng)盤(pán)具有兩種分開(kāi)的摩擦表面，壽命可以提高，制動(dòng)鉗的結(jié)構(gòu)也相應(yīng)簡(jiǎn)化。 機(jī)械式操縱機(jī)構(gòu) 基本維持原二代產(chǎn)品的結(jié)構(gòu)，主要組成件有手柄、前鋼絲拉索、棘齒板、調(diào)整螺套、鎖緊螺母、后鋼絲拉索及導(dǎo)盤(pán)等。前、后摩擦蹄片上下端被回位彈簧緊拉靠在上調(diào)節(jié)銷(xiāo)和下作用拉臂上，中上海工程技術(shù)大學(xué)畢業(yè)設(shè)計(jì)（論文） 轎車(chē)盤(pán)式制動(dòng)器結(jié)構(gòu)設(shè)計(jì) 37 間通過(guò)支承銷(xiāo)與底板活絡(luò)相接。作用拉臂，它受后鋼絲拉索的操縱，當(dāng)拉緊駐車(chē)制動(dòng)手柄時(shí)，作用拉臂將以中心軸銷(xiāo)為支點(diǎn)，撐開(kāi)前后摩擦蹄片，使與制動(dòng)盤(pán)內(nèi)鼓產(chǎn)生有效摩擦力矩，從而起到駐車(chē)制動(dòng)作用在專(zhuān)用駐車(chē)制動(dòng)器的制動(dòng)底板支架上，另有二只安裝孔，以便裝置后制動(dòng)鉗總成。 專(zhuān)用后駐車(chē)制動(dòng)器的駐車(chē)分解與合成當(dāng)拆 除了后輪毅、后制動(dòng)盤(pán)等若干零部件后，即可對(duì)專(zhuān)用駐車(chē)制動(dòng)器進(jìn)行分解與合成，基本工藝步驟如下 : 從前后摩擦蹄片卜，拆下回位彈簧，旋短調(diào)節(jié)銷(xiāo)長(zhǎng)度，拆下摩擦蹄片中間的支承銷(xiāo)夾 ,即可取下摩擦蹄片。 拆卸下與半軸套管凸緣的八只固定螺栓，即可取下駐車(chē)制動(dòng)器底板支架。 合成按分解的反向步驟進(jìn)行。039。后駐車(chē)制動(dòng)器的調(diào)整由于后駐車(chē)制動(dòng)器的制動(dòng)間隙屬非自動(dòng)補(bǔ)償式，使用一段時(shí)間后，制動(dòng)間隙會(huì)逐步上海工程技術(shù)大學(xué)畢業(yè)設(shè)計(jì)（論文） 轎車(chē)盤(pán)式制動(dòng)器結(jié)構(gòu)設(shè)計(jì) 38 增大，反映在手柄拉緊時(shí)的棘牙響數(shù)，將會(huì)超過(guò)規(guī)定數(shù) (正常響牙數(shù)為4}6)，這將影響后輪的駐車(chē)效能。調(diào)整的步驟如下 : 頂起汽車(chē)后部，并以支架支承車(chē)架，然后拆下后車(chē)輪 ； 擰松駐車(chē)制動(dòng)拉索調(diào)整螺套的鎖螺母 ； 取下后駐車(chē)制動(dòng)器上面長(zhǎng)孔內(nèi)的像膠堵塞 ,利用專(zhuān)用工具 (99372249)撥動(dòng)調(diào)節(jié)銷(xiāo)齒輪，使前、后摩擦蹄片撐開(kāi)，致使用手無(wú)法轉(zhuǎn)動(dòng)盤(pán)為止 ； 再次用專(zhuān)用工具撥松調(diào)節(jié)銷(xiāo)齒輪，使制動(dòng)盤(pán)能自由轉(zhuǎn)動(dòng) (制動(dòng)間隙約為 } )，重新在孔內(nèi)裝上橡膠堵塞，裝復(fù)后輪 ； 在駕駛室內(nèi)拉駐車(chē)制手柄至第三齒響位置，擰緊調(diào)節(jié)螺套，直至用手不能扳動(dòng)車(chē)輪旋轉(zhuǎn)為止 ； 上下拉動(dòng)和松開(kāi)駐車(chē)制動(dòng)手柄 3}4 次，對(duì)整個(gè)后駐車(chē)制動(dòng)裝置進(jìn)行磨合，檢查手柄最終拉緊時(shí)的最大行程為 6 牙，最后擰緊調(diào)節(jié)螺套的鎖緊螺母，并降下汽車(chē)。 the use of a disc brake, rear wheel will have to configure a dedicated parking brake. On the disc brake is concerned, there is the structure with the parking brake disc brake, the parking braking force acts on the brake discs on both sides of the work surface, such a brake plex structure, relatively somewhat less reliable. TurinV cars equipped with dualpiston sliding front disc brakes have specifically set up after the parking brake. The role of the parking brake force to the brake drum inner disk on the work surface, so that the brake disc has two separate friction surface, life can be improved, brake caliper is also simplified the structure. TurinV car rear parking brake device manipulated by a mechanical parking brake and special climate of two parts (brake disc for the traffic, shared parking brake parts.) 1, mechanical control mechanism to maintain the basic structure of the original secondgeneration products, mainly posed of pieces with a handle, the first wire cable, ratchet plate, adjust the threaded sleeve, locking nut, after the wire cable and the guide disc and so on. 2, the special structure and principle of the parking brake disc brake 上海工程技術(shù)大學(xué)畢業(yè)設(shè)計(jì)（論文） 轎車(chē)盤(pán)式制動(dòng)器結(jié)構(gòu)設(shè)計(jì) 40 after the match with a special parking brake, parking brake after the special bottom bracket through eight holes, and the rear axle relative to the fixed axle shaft flange bolts. Before and after the friction shoe upper and lower ends are pulled tight against the return spring on the role of regulation under the pull pin and arm in the middle and the bottom through the active support underwriting phase. Slide the gear on the pin on the regulator can adjust the elongation or shortening the length of sales to adjust the friction inside the shoe and drum brake disc space. Role in pulling arm, it is subject to manipulation after the wire cable, when the pull the handbrake lever, the role will be the central axis of the pin pulling arm as a fulcrum, the friction shoe before and after distraction, so that the drum with an effective brake disc friction torque, and thus play a role in the private parking brake parking brake in the brake plate bracket, and another two holes for the installation of rear brake clamp assembly. After the band drum and wheel brake disc will be Yi, after the special parking brake, brake caliper assembly, and so orderly together. 3, special parking brake after the deposition and synthesis in vehicle rear wheels when the removal of the Yi, a number of ponents such as rear brake disc, you can special parking brake on the deposition and synthesis, the basic process steps are as follows: From the front Bu friction shoe, remove the return spring, spin off the short length adjustment, remove the friction between the support shoe underwriting folder, you can remove the friction shoe. Remove the branch underwriting, Hou Lasuo loose parking brake pull arm connected with the role, remove the effect of the second arm pull the wheel speed sensor mounting bracket removed, you can remove the sensor. Remove the axle casing under the flange and the eight mounting bolts, then remove the parking brake bottom bracket. according to the requirements of the drum brakes on the parts removed for cleaning checks, abandoned exceeded the difference of wear parts. synthesis by deposition of the reverse steps. After synthesis, measured with a vernier caliper before the hind piece diameter, while toggle adjustment pin 1, the diameter value than 17239。, a small } 1 mm. After the adjustment of parking brake parking brake because the brake after the nonautomatic pensating clearance, the use of a period of time, the brake gap will graduall