513 20馬力輪式拖拉機的半軸與制動器設(shè)計（有cad圖等）,513,20馬力輪式拖拉機的半軸與制動器設(shè)計（有cad圖等）,20,馬力,輪式拖拉機,制動器,設(shè)計,cad 20馬力輪式拖拉機的半軸與制動器設(shè)計 摘 要 隨著我國農(nóng)業(yè)經(jīng)濟的發(fā)展，國內(nèi)市場對拖拉機的需求不斷增長，結(jié)合我國實情出發(fā)，特別是對中小型馬力拖拉機的需求量更大。 本次設(shè)計是在吸收成熟產(chǎn)品優(yōu)點的基礎(chǔ)上優(yōu)化設(shè)計處出半軸與制動器，拖拉機的制動裝置分行車制動裝置和駐車制動裝置。行車制動裝置使行駛中的拖拉機強制減速或停車，并使拖拉機在下短坡時保持適當(dāng)?shù)姆€(wěn)定速度；駐車制動裝置使拖拉機能夠在斜坡上停車并長時間保持穩(wěn)定狀態(tài)，它也有助于拖拉機在坡路上起步。制動器有盤式和鼓式之分。制動器的布置方式分半軸制動和輪邊制動。制動器的驅(qū)動方式有液壓驅(qū)動和機械驅(qū)動。此設(shè)計結(jié)合現(xiàn)有的中小型拖機，采用行車制動和駐車制動為一體，操縱機構(gòu)為機械制動，制動器布置在輪邊的鼓式制動器。半軸采用半浮式。 關(guān)鍵詞：行車制動，駐車制動，制動力矩，制動蹄，制動鼓，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 符號說明 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 制動力矩，N m rdq 輪胎滾動半徑，mm 地面附著系數(shù)， D 制動鼓直徑 ，mm β 摩擦襯片包角， A 摩擦襯片的摩擦面積 F 制動蹄的張開力，N b 摩擦襯片的寬度 BF 制動器因數(shù) V 拖拉機行駛速度 g 重力加速度 目 錄 第一章 前 言…………………………………………………………………1 第二章 概述 …………………………………………………………3 §2.1制動系的功用和組成…………………………………………3 §2.2 制動器的工作情況.………………………………………………3 §2.3 制動器的設(shè)計要求………………………………………………4 §2.4制動力矩的確定………………………………………………6 §2.4.1制動器的結(jié)構(gòu)…………………………………………………6 §2.4.2拖拉機的結(jié)構(gòu)參數(shù)……………………………………………7 §2.4.3 制動器的結(jié)構(gòu)參數(shù)………………………………………….8 §2.4.4 制動器的力矩計算…………………………………………10 第三章 制動蹄片上的制動力和踏板力的計算 ……………………………13 §3.1 制動蹄摩擦面的壓力分布規(guī)律及徑向變形規(guī)律………………13 §3.2 制動力的計算……………………………………………………15 §3.3制動器因數(shù)與制動蹄因數(shù)…………………………………………19 §3.3.1 制動器因數(shù)…………………………………………………19 §3.3.2 制動蹄因數(shù)…………………………………………………19 §3.4 踏板力的計算……………………………………………25 第四章 半軸的計算和彈簧結(jié)構(gòu)的計算……………………………………28 §4.1 半軸的計算……………………………………………………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………………………………………………………………………33 致 謝 ………………………………………………………………………34 6