513 20馬力輪式拖拉機(jī)的半軸與制動(dòng)器設(shè)計(jì)（有cad圖等）,513,20馬力輪式拖拉機(jī)的半軸與制動(dòng)器設(shè)計(jì)（有cad圖等）,20,馬力,輪式拖拉機(jī),制動(dòng)器,設(shè)計(jì),cad 20馬力輪式拖拉機(jī)的半軸與制動(dòng)器設(shè)計(jì) 摘 要 隨著我國(guó)農(nóng)業(yè)經(jīng)濟(jì)的發(fā)展，國(guó)內(nèi)市場(chǎng)對(duì)拖拉機(jī)的需求不斷增長(zhǎng)，結(jié)合我國(guó)實(shí)情出發(fā)，特別是對(duì)中小型馬力拖拉機(jī)的需求量更大。 本次設(shè)計(jì)是在吸收成熟產(chǎn)品優(yōu)點(diǎn)的基礎(chǔ)上優(yōu)化設(shè)計(jì)處出半軸與制動(dòng)器，拖拉機(jī)的制動(dòng)裝置分行車(chē)制動(dòng)裝置和駐車(chē)制動(dòng)裝置。行車(chē)制動(dòng)裝置使行駛中的拖拉機(jī)強(qiáng)制減速或停車(chē)，并使拖拉機(jī)在下短坡時(shí)保持適當(dāng)?shù)姆€(wěn)定速度；駐車(chē)制動(dòng)裝置使拖拉機(jī)能夠在斜坡上停車(chē)并長(zhǎng)時(shí)間保持穩(wěn)定狀態(tài)，它也有助于拖拉機(jī)在坡路上起步。制動(dòng)器有盤(pán)式和鼓式之分。制動(dòng)器的布置方式分半軸制動(dòng)和輪邊制動(dòng)。制動(dòng)器的驅(qū)動(dòng)方式有液壓驅(qū)動(dòng)和機(jī)械驅(qū)動(dòng)。此設(shè)計(jì)結(jié)合現(xiàn)有的中小型拖機(jī)，采用行車(chē)制動(dòng)和駐車(chē)制動(dòng)為一體，操縱機(jī)構(gòu)為機(jī)械制動(dòng)，制動(dòng)器布置在輪邊的鼓式制動(dòng)器。半軸采用半浮式。 關(guān)鍵詞：行車(chē)制動(dòng)，駐車(chē)制動(dòng)，制動(dòng)力矩，制動(dòng)蹄，制動(dòng)鼓，摩擦襯片 20 horsepower wheeled tractor rear axles and brake design ABSTRACT Along with our country agricultural economy development , the domesticmarket unceasingly grows to the tractor demand, unifies our country agriculture truth to embark , is specially bigger to the middle and small scale tractor demand quantity 。 This design is optimizes in the absorption mature product meritfoundation designs axles has the driving arresting gear and in thevehicle arresting gear with the brake tractor arresting gear .The driving arresting gear causes in the travel the tractor to decelerateor to stop; Applies the brake in the vehicle to enable the tractor tostop and the long time in the pitch maintains the steady state.The brake has the drum type and the disc type division .The brake arrangement way has axles applies the brake with nearby turn to applythe brake, the brake drive type has the hydraulic pressure actuationand the machinery actuates. This design union existing middle andsmall scale tractorbrake installs the structure and the type, and theconsult correlation data carries on the optimized design, uses thedriving to apply the brake with to apply the brake in the vehicle is abody , The control mechanism machinery applies the brake the way. Thebrake arrangement the drum type brake which applies the brake nearbythe wheel. axles uses the semisubmersible type. Key word: The driving applies the brake, applies the brake in thevehicle, brake drum, brakeshoe 符號(hào)說(shuō)明 L 軸距，mm e 輪距，mm ms 總質(zhì)量，Kg h 離地間隙，mm hs 質(zhì)心高度，mm Mr 制動(dòng)力矩，N m rdq 輪胎滾動(dòng)半徑，mm 地面附著系數(shù)， D 制動(dòng)鼓直徑 ，mm β 摩擦襯片包角， A 摩擦襯片的摩擦面積 F 制動(dòng)蹄的張開(kāi)力，N b 摩擦襯片的寬度 BF 制動(dòng)器因數(shù) V 拖拉機(jī)行駛速度 g 重力加速度 目 錄 第一章 前 言…………………………………………………………………1 第二章 概述 …………………………………………………………3 §2.1制動(dòng)系的功用和組成…………………………………………3 §2.2 制動(dòng)器的工作情況.………………………………………………3 §2.3 制動(dòng)器的設(shè)計(jì)要求………………………………………………4 §2.4制動(dòng)力矩的確定………………………………………………6 §2.4.1制動(dòng)器的結(jié)構(gòu)…………………………………………………6 §2.4.2拖拉機(jī)的結(jié)構(gòu)參數(shù)……………………………………………7 §2.4.3 制動(dòng)器的結(jié)構(gòu)參數(shù)………………………………………….8 §2.4.4 制動(dòng)器的力矩計(jì)算…………………………………………10 第三章 制動(dòng)蹄片上的制動(dòng)力和踏板力的計(jì)算 ……………………………13 §3.1 制動(dòng)蹄摩擦面的壓力分布規(guī)律及徑向變形規(guī)律………………13 §3.2 制動(dòng)力的計(jì)算……………………………………………………15 §3.3制動(dòng)器因數(shù)與制動(dòng)蹄因數(shù)…………………………………………19 §3.3.1 制動(dòng)器因數(shù)…………………………………………………19 §3.3.2 制動(dòng)蹄因數(shù)…………………………………………………19 §3.4 踏板力的計(jì)算……………………………………………25 第四章 半軸的計(jì)算和彈簧結(jié)構(gòu)的計(jì)算……………………………………28 §4.1 半軸的計(jì)算……………………………………………………28 §4.2 彈簧結(jié)構(gòu)的主要幾何參數(shù)………………………………………30 第五章 結(jié) 論…………………………………………………………………32 參考文獻(xiàn)………………………………………………………………………33 致 謝 ………………………………………………………………………34 6