【正文】 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。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。 合成按分解的反向步驟進(jìn)行。 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。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。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。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。 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。 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)。 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。 選用摩擦材料時(shí)應(yīng)考慮到：通常，摩擦系數(shù)愈高的材料其耐磨性愈差。 另一種為編織材料，其撓性好，剪切后可直接鉚到任何半徑的制動(dòng)蹄或制動(dòng)塊上。許多盤(pán)式制動(dòng)器裝有摩擦襯塊達(dá)到磨損極限時(shí)的報(bào)警裝置，以便能及時(shí)更換摩擦襯塊。制動(dòng)塊背板由鋼板制成。制動(dòng)鉗位于車(chē)軸前可避免輪胎甩出來(lái)的泥、水進(jìn)入制動(dòng)鉗，位于車(chē)軸后則可減小制動(dòng)時(shí)輪轂軸承的合成載荷。為了提高其耐磨性能，活塞的工作面進(jìn)行鍍鉻處理。一般多在鉗體中加工出制動(dòng)油缸，也有將單獨(dú)制造的油缸嵌入鉗體中的。 制動(dòng)鉗 制動(dòng)鉗由可鍛鑄鐵 KTH370 或 QT40018 制造，也有用輕合金制造的，例如用鋁合金壓鑄。 制動(dòng)盤(pán)在工作時(shí)不僅承受著制動(dòng)塊作用的法向力和切向力，而且承受著熱負(fù)荷。 本章主要是對(duì)制動(dòng)器的主要零部件的尺寸進(jìn)行了計(jì)算，同時(shí)又計(jì)算出前、后制動(dòng)器的制動(dòng)力矩，又對(duì)緊急制動(dòng)時(shí)的踏板力進(jìn)行了審核，制動(dòng)踏板的行程也進(jìn)行了估算。表 － 25aS cm? ； 主缸推桿與活塞間隙： ?01? ； 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) 28 主缸活塞空行程： ?02? 2mm； 則： ~)()7~4( ?????PS mm. 法規(guī)要求不大于 150－ 200mm，故符合法規(guī)。 效率η＝ － ，取η＝ 則 NFP ~ 17~4 )(4 62 ??????? 　? 可見(jiàn)踏板力符合法律要求（ 350－ 550 范圍）。那么盤(pán)式制動(dòng)器制動(dòng)力矩為： eRFfM ??? 021? 單側(cè)制動(dòng)塊對(duì)盤(pán)的壓力： ???? 1 6 7 723 3 5 322fFF ? 后輪制動(dòng)器的制動(dòng)力矩： mmNFfRM m ??????? 4 5 8 21 6 7 02? 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) 27 同理前輪制動(dòng)器的制動(dòng)力矩為 mmN? 制動(dòng)輪缸直徑的計(jì)算 制動(dòng)輪缸對(duì)制動(dòng)蹄 (塊 )施加的張開(kāi)力 Fo 與輪缸直徑 d 和制動(dòng)管路壓力 p 的關(guān)系為 )/(4 0 pFd ?? （ 44） 制動(dòng)智路壓力一般不超過(guò) 10— 12MPa，對(duì)盤(pán)式制動(dòng)器可更高。汽車(chē)滿載質(zhì)量為 1545kg。具有通風(fēng)孔道的制動(dòng)盤(pán)的兩工作面之間的尺寸，即制動(dòng)盤(pán)的厚度取為 20 mm～ 50mm，但多采用 2