ZL50 裝載機(jī)驅(qū)動(dòng)橋設(shè)計(jì)與優(yōu)化含5張CAD圖
ZL50 裝載機(jī)驅(qū)動(dòng)橋設(shè)計(jì)與優(yōu)化含5張CAD圖,ZL50,裝載機(jī)驅(qū)動(dòng)橋設(shè)計(jì)與優(yōu)化含5張CAD圖,裝載,驅(qū)動(dòng),設(shè)計(jì),優(yōu)化,CAD
摘 要
隨著主機(jī)性能要求的提高和變化，逐漸顯現(xiàn)目前國(guó)內(nèi) ZL50 裝載機(jī)傳動(dòng)系配置較單一、陳舊。本次設(shè)計(jì)內(nèi)容為ZL50裝載機(jī)終的傳動(dòng)結(jié)構(gòu)設(shè)計(jì)，大致上分為輪邊減速器的設(shè)計(jì)，半軸的設(shè)計(jì)，最終傳動(dòng)的設(shè)計(jì)三大部分。將齒輪的幾個(gè)基本參數(shù)，如齒數(shù)，模數(shù)，從動(dòng)齒輪的分度圓直徑等確定以后，用大量的公式可計(jì)算出齒輪的所有幾何參數(shù)，進(jìn)而進(jìn)行齒輪的受力分析和強(qiáng)度校核。了解了輪邊減速器，半軸和最終傳動(dòng)的結(jié)構(gòu)和工作原理以后，結(jié)合設(shè)計(jì)要求，合理選擇它們的形式及尺寸。本次設(shè)計(jì)輪邊減速器齒輪選用圓柱直齒輪，半軸采用全浮式 ，最終傳動(dòng)采用單行星排減速形式。
關(guān)鍵詞: ZL50 裝載機(jī) 驅(qū)動(dòng)橋 設(shè)計(jì)
1 前 言
裝載機(jī)是當(dāng)今工程建設(shè)中應(yīng)用最為廣泛的一種工程機(jī)械，其在500米運(yùn)距內(nèi)鏟、運(yùn)、卸物料非常方便和經(jīng)濟(jì)。小至普通家庭房屋建設(shè)，大至三峽、青藏鐵路等國(guó)家重大工程都有其忙碌的身影。
驅(qū)動(dòng)橋是輪式裝載機(jī)底盤(pán)的主要組成部分，其功用是將發(fā)動(dòng)機(jī)的扭矩進(jìn)一步增大，以適應(yīng)車(chē)輪為克服前進(jìn)阻力所需要的扭矩。
驅(qū)動(dòng)橋包括主傳動(dòng)器、差速器、半軸、最終傳動(dòng)、橋殼等部件。ZL50裝載機(jī)為充分利用其附著重量，達(dá)到較大的牽引力，采用全橋驅(qū)動(dòng)橋。其減速比一般為12～35，并按以下原則進(jìn)行速比分配：在最終傳動(dòng)能安裝的前提下，為了減小主傳動(dòng)及半軸所傳遞的扭矩，將速比盡可能地分配給最終傳動(dòng)，使整體結(jié)構(gòu)部件尺寸減小，結(jié)構(gòu)緊湊。
畢業(yè)設(shè)計(jì)是大學(xué)四年學(xué)習(xí)的最后一門(mén)功課，其目的是綜合應(yīng)用所學(xué)專(zhuān)業(yè)基礎(chǔ)知識(shí)及專(zhuān)業(yè)知識(shí)，鞏固所學(xué)內(nèi)容，提高分析問(wèn)題解決問(wèn)題的能力，為進(jìn)一步的學(xué)習(xí)工作打好基礎(chǔ)。
6
2 研究狀況及發(fā)展趨勢(shì)
我國(guó)國(guó)民經(jīng)濟(jì)建設(shè)的持續(xù)高漲，城市化、城鎮(zhèn)化進(jìn)程的不斷加速，勞動(dòng)力的需求越來(lái)越緊缺，勞動(dòng)力成本也越來(lái)越高，裝載機(jī)作為一種既機(jī)動(dòng)靈活，又價(jià)廉物美的機(jī)器設(shè)備，將取代高成本、低效率的手工勞動(dòng)，特別是西部大開(kāi)發(fā)，這類(lèi)產(chǎn)品將有廣闊的潛在市場(chǎng)。所以，小型裝載機(jī)將具有良好的開(kāi)發(fā)前景 。
國(guó)外輪式裝載機(jī)最早出現(xiàn)在第二次工業(yè)革命時(shí)期，其發(fā)展到今天，無(wú)論是技術(shù)、設(shè)計(jì)、制造還是銷(xiāo)售、服務(wù)等都已經(jīng)非常成熟。
方法及預(yù)期目的：
經(jīng)過(guò)相關(guān)資料的查閱，選擇適當(dāng)?shù)臄?shù)據(jù)，經(jīng)過(guò)正確的計(jì)算確定各個(gè)設(shè)計(jì)部分的合理尺寸，設(shè)計(jì)出驅(qū)動(dòng)橋，包括主減速器、差速器、輪邊減速器、半軸及橋殼等部件。使設(shè)計(jì)出的產(chǎn)品使用方便，節(jié)約材料使用，經(jīng)濟(jì)性能較好。具體資料查閱如下：
吉林工業(yè)大學(xué)工程機(jī)械教研室主編的《輪式裝載機(jī)》，這本書(shū)讓我系統(tǒng)了解了當(dāng)前國(guó)內(nèi)外對(duì)于輪式裝載機(jī)的最新設(shè)計(jì)技術(shù)和應(yīng)用技術(shù)。大致了解了輪式裝載機(jī)的整體構(gòu)造，包括工作裝置以及動(dòng)力系統(tǒng),傳動(dòng)系統(tǒng),制動(dòng)系統(tǒng),行走系統(tǒng),液壓系統(tǒng),電氣系統(tǒng)的組成。通過(guò)具體實(shí)例的講解和典型工程應(yīng)用，確切講解了輪式裝載機(jī)。讓我對(duì)自己的畢設(shè)研究課題有了清晰的了解。
濮良貴主編的《機(jī)械設(shè)計(jì)》（第八版），這本書(shū)細(xì)致介紹了各種傳動(dòng)形式，以及零件強(qiáng)度校核，零件連接方式，螺栓組的連接設(shè)計(jì)，齒輪強(qiáng)度，模數(shù)，齒型，齒寬等多個(gè)參數(shù)的選擇設(shè)計(jì)。零件的設(shè)計(jì)，機(jī)器的大體設(shè)計(jì)等眾多的機(jī)械設(shè)計(jì)。
靳同紅、王勝春主編的《工程機(jī)械底盤(pán)構(gòu)造與設(shè)計(jì)》成大先主編的《機(jī)械設(shè)計(jì)手冊(cè)》（第六版）這兩本書(shū)系統(tǒng)具體的介紹了裝載機(jī)的各個(gè)部位構(gòu)造設(shè)計(jì)，《工程機(jī)械底盤(pán)構(gòu)造與設(shè)計(jì)》中第13章中對(duì)驅(qū)動(dòng)橋的概述和細(xì)致介紹讓我對(duì)自己研究課題有了更加清晰的認(rèn)識(shí)，也有了具體的理論知識(shí)，而且實(shí)用性較強(qiáng)。當(dāng)然，本書(shū)的別的章節(jié)也讓我大致明白了很多驅(qū)動(dòng)橋的參數(shù)來(lái)源。也了解到差速器，轉(zhuǎn)向離合器，轉(zhuǎn)向制動(dòng)器等多種部件的構(gòu)造、用途和組成部分。而《機(jī)械設(shè)計(jì)手冊(cè)》中對(duì)傳動(dòng)形式和傳動(dòng)機(jī)構(gòu)的詳細(xì)講訴更是讓我受益匪淺。
西北工業(yè)大學(xué)機(jī)械原理與機(jī)械零件教研室主編的《機(jī)械原理》，這本書(shū)細(xì)致介紹了所有的傳動(dòng)形式，以及輪系傳動(dòng)的介紹，機(jī)構(gòu)介紹以及機(jī)構(gòu)分析機(jī)構(gòu)運(yùn)行方式，機(jī)構(gòu)運(yùn)行計(jì)算，包括大量實(shí)例，讓我對(duì)書(shū)中知識(shí)理解更加深刻。
林幕義，張福生主編的《車(chē)輛底盤(pán)與構(gòu)造設(shè)計(jì)》主要以國(guó)內(nèi)汽車(chē)為主流車(chē)型，詳細(xì)介紹了汽車(chē)底盤(pán)的基本結(jié)構(gòu)、工作原理及主要總成的拆裝，重點(diǎn)介紹了膜片式離合器、手動(dòng)變速器、自動(dòng)變速器、驅(qū)動(dòng)橋、四輪轉(zhuǎn)向系統(tǒng)、電子控制懸架系1統(tǒng)、動(dòng)力轉(zhuǎn)向系統(tǒng)、汽車(chē)ABS/ASR系統(tǒng)的結(jié)構(gòu)及工作原理等內(nèi)容。本書(shū)將教材內(nèi)容模塊化，將汽車(chē)底盤(pán)分為4個(gè)模塊，20個(gè)項(xiàng)目，以真實(shí)案例導(dǎo)入，以工作任務(wù)為導(dǎo)向，以真實(shí)的任務(wù)來(lái)設(shè)計(jì)實(shí)訓(xùn)項(xiàng)目。使我對(duì)驅(qū)動(dòng)橋設(shè)計(jì)的了解進(jìn)一步加深。
3 設(shè)計(jì)的目的和意義
本課題研究的是ZL50裝載機(jī)驅(qū)動(dòng)橋的設(shè)計(jì)。驅(qū)動(dòng)橋位于傳動(dòng)系的末端，其基本功用是增大由傳動(dòng)軸或直接從變速器傳來(lái)的轉(zhuǎn)矩，將轉(zhuǎn)矩合理的分配給左、右驅(qū)動(dòng)車(chē)輪，使其具有行駛運(yùn)動(dòng)學(xué)所要求的差速功能；同時(shí)，驅(qū)動(dòng)橋還要承受作用于路面和車(chē)架之間的鉛垂力、縱向力和橫向力。
傳動(dòng)系總?cè)蝿?wù)是傳遞發(fā)動(dòng)機(jī)的動(dòng)力，使之適應(yīng)于裝載機(jī)行駛的需要。在一般的機(jī)械式傳動(dòng)中，有了變速器還不能完全解決發(fā)動(dòng)機(jī)特性與裝載機(jī)行駛要求間的矛盾和結(jié)構(gòu)布置上的問(wèn)題。首先是因?yàn)榻^大多數(shù)的發(fā)動(dòng)機(jī)在裝載機(jī)上是縱向安置的，通過(guò)主減速器將其轉(zhuǎn)矩傳給左、右驅(qū)動(dòng)輪以改變轉(zhuǎn)矩的傳遞方向，同時(shí)還得有驅(qū)動(dòng)橋的差速器來(lái)解決左、右驅(qū)動(dòng)車(chē)輪間的轉(zhuǎn)矩分配問(wèn)題和差速要求。其次是因?yàn)樽兯倨鞯闹饕蝿?wù)僅在于通過(guò)選擇適當(dāng)?shù)臋n位數(shù)及各檔傳動(dòng)比，以使內(nèi)燃機(jī)的轉(zhuǎn)矩—轉(zhuǎn)速特性能適應(yīng)裝載機(jī)在各種行駛阻力下對(duì)動(dòng)力性與經(jīng)濟(jì)性的要求，而驅(qū)動(dòng)橋主減速器的功用則在于當(dāng)變速器處于最低檔位時(shí)，使汽車(chē)有足夠的牽引力和良好的燃料經(jīng)濟(jì)性。
畢業(yè)設(shè)計(jì)（論文）文獻(xiàn)查閱情況
吉林工業(yè)大學(xué)工程機(jī)械教研室主編的《輪式裝載機(jī)》這本書(shū)讓我系統(tǒng)了解了當(dāng)前國(guó)內(nèi)外對(duì)于輪式裝載機(jī)的最新設(shè)計(jì)技術(shù)和應(yīng)用技術(shù)。大致了解了輪式裝載機(jī)的整體構(gòu)造，包括工作裝置以及動(dòng)力系統(tǒng),傳動(dòng)系統(tǒng),制動(dòng)系統(tǒng),行走系統(tǒng),液壓系統(tǒng),電氣系統(tǒng)的組成。通過(guò)具體實(shí)例的講解和典型工程應(yīng)用，確切講解了輪式裝載機(jī)。讓我對(duì)自己的畢設(shè)研究課題有了清晰的了解。
濮良貴主編的《機(jī)械設(shè)計(jì)》(第八版）這本書(shū)細(xì)致介紹了各種傳動(dòng)形式，以及零件強(qiáng)度校核，零件連接方式，螺栓組的連接設(shè)許，齒輪強(qiáng)度，模數(shù)，齒型，齒寬等多個(gè)參數(shù)的選擇設(shè)計(jì)。零件的設(shè)計(jì)，機(jī)器的大體設(shè)計(jì)等眾多的機(jī)械設(shè)計(jì)。
靳同紅、王勝春主編的《工程機(jī)械底盤(pán)構(gòu)造與設(shè)計(jì)》和成大先主編的《機(jī)械設(shè)計(jì)手冊(cè)》(第六版)這兩本書(shū)系統(tǒng)具體的介紹了裝載機(jī)的各個(gè)部位構(gòu)造設(shè)計(jì)，《工程機(jī)械底盤(pán)構(gòu)造與設(shè)訐》中第I3章中對(duì)驅(qū)動(dòng)橋的概述和細(xì)致介紹讓我對(duì)自己研究課題有了更加清晰的認(rèn)識(shí)，也有了具體的理論知識(shí)，而且實(shí)用性較強(qiáng)。當(dāng)然，本書(shū)的別的章書(shū)也讓我大致明白了很多驅(qū)動(dòng)橋的參數(shù)來(lái)源。也了解到差速器，轉(zhuǎn)向離合器，轉(zhuǎn)向制動(dòng)器等多種部件的構(gòu)造、用途和組成部分。而《機(jī)械設(shè)計(jì)手冊(cè)》中對(duì)傳動(dòng)形式和傳動(dòng)機(jī)構(gòu)的詳細(xì)講訴更是讓我受益匪淺。
西北工業(yè)大學(xué)機(jī)械原理與機(jī)械零件教研室主編的《機(jī)械原理》這本書(shū)細(xì)致介紹了所有的傳動(dòng)形式，以及輪系傳動(dòng)的介紹，機(jī)構(gòu)介紹以及機(jī)構(gòu)分析機(jī)構(gòu)運(yùn)行方式，機(jī)構(gòu)運(yùn)行計(jì)算，包括大量實(shí)例，讓我對(duì)書(shū)中知識(shí)理解更加深刻。
林幕義，張福生主編的《車(chē)輛底盤(pán)與構(gòu)造設(shè)計(jì)》主要以國(guó)內(nèi)汽車(chē)為主流車(chē)型，詳細(xì)介紹了汽車(chē)底盤(pán)的基本結(jié)構(gòu)、工作原理及主要總成的拆裝，重點(diǎn)介紹了膜片式離合器、手動(dòng)變速器、百動(dòng)變速器、驅(qū)動(dòng)橋、四輪轉(zhuǎn)向系統(tǒng)、電子控制懸架系統(tǒng)、動(dòng)力轉(zhuǎn)向系統(tǒng)、汽車(chē)ABS/ASR系統(tǒng)的結(jié)構(gòu)及工作原理等內(nèi)容。這本書(shū)將教材內(nèi)容模塊化，將汽車(chē)底盤(pán)分為4個(gè)模塊，20個(gè)項(xiàng)目，以真實(shí)案例導(dǎo)入，以工作任務(wù)為導(dǎo)向，以真實(shí)的任務(wù)來(lái)設(shè)計(jì)實(shí)訓(xùn)項(xiàng)目。使我對(duì)驅(qū)動(dòng)橋設(shè)計(jì)的了解進(jìn)一步加深。
4.參考文獻(xiàn)
[1] 吉林工業(yè)大學(xué)工程機(jī)械教研室. 《輪式裝載機(jī)設(shè)計(jì)》[M]. 北京：中國(guó)建筑工業(yè)出版社. 1982. 11：63－85
[2] 濮良貴.《機(jī)械設(shè)計(jì)》（第八版）. 高等教育出版社.2006.5
[3] 王勝春.《工程機(jī)械底盤(pán)構(gòu)造與設(shè)計(jì)》. 化學(xué)工業(yè)出版社. 2011.2
[4] 孫恒《機(jī)械原理》.高等教育出版社. 2013.5
[5] 成大先.《機(jī)械設(shè)計(jì)手冊(cè)》（第六版）. 北京：化學(xué)工業(yè)出版社，2004.5
[6]楊占敏.《輪式裝載機(jī)設(shè)計(jì)》[M]. 北京：化學(xué)工業(yè)出版社，2006.1
[7]《車(chē)輛底盤(pán)設(shè)計(jì)與構(gòu)造》冶金工業(yè)出版社, 林慕義 張福生，2007.1
山 西 能 源 學(xué) 院
2020屆本科畢業(yè)設(shè)計(jì)（論文）
外文翻譯
論文題目：
ZL50 裝載機(jī)驅(qū)動(dòng)橋設(shè)計(jì)與優(yōu)化
姓 名：
張浩
學(xué) 號(hào)：
2017008151
系 部：
機(jī)電工程系
專(zhuān) 業(yè)：
機(jī)械設(shè)計(jì)制造及自動(dòng)化
班 級(jí)：
1704
指導(dǎo)教師：
方明燁
職 稱(chēng)：
教授
完成日期：
2021.3.22----2021.6.13
Loader
A loader is a type of construction equipment (engineering vehicle) machinery that is primarily used to "load" material into another type of machinery (dump truck, conveyor belt, rail-car, etc.).Loaders are used mainly for uploading materials into trucks, laying pipe, clearing rubble, and digging. A loader is not the most efficient machine for digging as it cannot dig very deep below the level of its wheels, like a backhoe can. Their deep bucket can usually store about 3-6 cubic meters of earth. The front loader's bucket capacity is much bigger than a bucket capacity of a backhoe loader. Loaders are not classified as earthmoving machinery, as their primary purpose is other than earthmoving.
Unlike most bulldozers, most loaders are wheeled and not tracked, although track loaders are common. They are successful where sharp edged materials in construction debris would damage 2 rubber wheels, or where the ground is soft and muddy. Wheels provide better mobility and speed and do not damage paved roads as much as tracks, but provide less traction.
Unlike standard tractors fitted with a front bucket, many large loaders do not use automotive steering mechanisms. Instead, they steer by a hydraulically actuated pivot point set exactly between the front and rear axles. This is referred to as "articulated steering" and allows the front axle to be solid, allowing it to carry greater weight. Articulated steering provides better maneuverability for a given wheelbase. Since the front wheels and attachment rotate on the same axis, the operator is able to "steer" his load in an arc after positioning the machine, which can be useful.
The loader assembly may be a removable attachment or permanently mounted. Often the bucket can be replaced with other devices or tools--for example, many can mount forks to lift heavy pallets or shipping containers, and a hydraulically-opening "clamshell" bucket allows a loader to act as a light dozer or scraper.
In construction areas loaders are also used to transport building materials - such as bricks,
pipe, metal bars, and digging tools - over short distances.Loaders are also used for snow removal, using their bucket or a snowbasket, but usually using a snowplow attachment. They
clear snow from streets, highways and parking lots. They sometimes load snow into dump trucks for transport.
Front loaders gained popularity during the last two decades, especially in urban engineering projects and small earthmoving works. Many engineering vehicle manufacturers offer a wide range of loaders, the most notable are those of John Deere, Caterpillar, Case, Volvo, Komatsu and Liebherr.
The following we will introduce Carter 938G Series II Wheel Loader.
Engine
The 938G II provides more power, excellent fuel economy, and reduced maintenance.
Turbocharged, ATAAC. Turbocharging packs dense air into the cylinders for more complete combustion and lower emissions. Air-to-air aftercooling (ATAAC) provides a separate cooling system for intake manifold air. The ATAAC system reduces smoke and emissions by providingcooler inlet air for more efficient combustion.
Constant Net Horsepower. The 938G II’s electronic engine is integrated with an on-demand cooling fan. The engine compensates for varying fan loads and provides constant net horsepower, regardless of operating conditions. A consistent level of “working” horsepower is provided and fuel consumption is reduced.
Oil Change Intervals. The engine oil change interval is increased to
500 hours (with CH-4 oil), reducing costs and downtime
Powerful Performance. The 3126B ATAAC engine delivers net power of 119 kW (160 hp), and meets EPA Tier 2 emissions standards. Its advanced system keeps fuel at low pressure in the fuel lines until it is injected into the cylinder. Fuel pressure is created hydraulically in response to a signal from the ADEM III? Electronic Control Module.
Electronic Control Module. The Advanced Diesel Engine Module (ADEM III) fuel system is
a proprietary electronic control module, which provides improved engine response and fuel efficiency,plus advanced diagnostics and reduced emissions. Altitude capability is increased to 3050 meters (10,000 feet) without derating. ADEM III allows full electronic integration
of the engine and transmission for maximum power train efficiency.
Power Train
Advanced Caterpillar power train is reliable and fuel efficient.Electronic Power Shift Transmission.The electronic power shift transmission with automatic shift capability is a countershaft design built by Caterpillar. It is electronically controlled and allows full power shifts and directional changes. Fully modulated gear shifts contribute to operator comfort and increase component life.Electronic Clutch Pressure Control (ECPC). Senses input from both the transmission and the operator controls in the cab to modulate each individual clutch through a proportional electro-hydraulic valve. This results in smoother gear changes and improved shift quality. Energy is modulated into the clutches, resulting in longer clutch life.
Integrated Braking System. New for G Series II, IBS integrates downshifting and transmission neutralization into the left-hand brake pedal. IBS provides smooth, optimized transmission neutralizer performance with a greater range of adjustability. The Integrated Braking System also lowers owning and operating costs by reducing axle oil temperatures, which can extend service brake life.Easy Service. Daily transmission oil level check is done from the ground through a well-protected sight gauge.An oil sampling valve allows quick,clean access to the transmission for S?O?SSM oil analysis.
Cooling System
New G Series II cooling package reduces radiator plugging and improves fuel efficiency.
Reverse Flow. Air enters through the rear grill and exits out the top opening and side hood doors. Rear air flow picks up less debris from the ground, reducing plugging.
Improved System Access. The 938G II adds a swing-out grill, hydraulic oil cooler and air conditioner condenser for easier cleaning. Side panels open to allow access to both sides of all cores for cleaning. A heavy duty Airborne Debris Grill, with 4 mm perforations is available as an attachment.
On-Demand Fan. Electronically controlled, variable speed on-demand fan adjusts to meet the varying cooling requirements of the machine. Fan speed is determined by oil, coolant and inlet
manifold temperatures. In cooler operating conditions, average fan speed is reduced, resulting in less fuel consumption, lower noise levels and less radiator plugging.
Unit Core Radiator. New unit core radiator with square wave shaped fins.Lower fin density (6 fins per inch) allows debris to pass through more easily.
Environmental Features
Caterpillar cares about the environment and continues to develop innovative solutions.
Low Exhaust Emissions. The Cat 3126B ATAAC engine used in the 938G Series II is a low emission engine designed to meet Tier 2 emission regulations. It is electronically controlled, with air-to-air aftercooling for more efficient combustion and cleaner emissions.
Reduced Sound. The electronic on-demand fan automatically
regulates fan speed depending on cooling requirements. The fan draws less horsepower in cooler ambient temperatures, which reduces fuel consumption. Sound levels are also reduced when the fan slows down.There is additional insulation around the engine to reduce sound levels.
Environmental Fluids. Extended Life Coolant/Antifreeze with anti-foaming and anti-corrosion properties provide extended service intervals (up to 6000 hours) and requires less frequent fluid changes and disposals. Air conditioning refrigerant is CFC-free.
Operator Station
The ultimate in wheel loader operator comfort and efficiency.
1 Steering. Low effort hand metering unit steering. Tilt steering column helps fit the wheel to the operator. Load sensing steering directs power through the steering system only when needed. When not steering, more engine power is available to generate rimpull, breakout and lift forces.
2 Excellent Visibility. The front window provides remarkable forward and peripheral
viewing, including the machine wheels and bucket corners. Bonded glass in the windshield eliminates frame obstructions.The sloping hood provides excellent visibility to the rear of the machine.
3 Finger Tip Controls. New pilot-assisted hydraulic implement controls deliver comfortable, low-effort operation. Single lever joystick and lift lever F-N-R switch are available as attachments.
4 New Instrument Cluster. Gauges, status indicators and alert indicators are now centrally located. 3-level warning system monitors key functions. The system alerts the operator of immediate or impending problems with engine oil pressure, parking brake, fuel pressure,electrical system, brake oil pressure,hydraulic oil temperature, transmission filter bypass, engine inlet manifold temperature, primary steering oil pressure and the air inlet heater. LED warning indicators with no bulbs to replace.
5 Cab Access. Left and right side doors swing open 180 degrees and latch for optimal ventilation, visibility and communication to ground level. Left and right side sliding windows are available as an attachment. Full service platforms are provided on both sides of the machine for safety and easy maintenance access.
6 Floor Mounted Pedals. All pedals including the new electronic governor,are floor mounted for greater operator comfort. Left pedal incorporates the new Integrated Braking System that combines service brake, transmission neutralizer and downshift functions.
7 Generous Storage Space.Compartments for lunchbox, coolers
and cups.
8 Seat Options. The standard cloth and vinyl seat adjusts 6 ways. A new Caterpillar Contour
air suspension seat (attachment) provides increased operator comfort with 6-way adjustment and automotive-style lumbar support.
9 Electronic Autoshift Control. Set for manual or one of two fully automatic shifting modes.
10 Ride Control System Switch.Attachment that reduces fore and aft pitch for a smoother, more comfortable ride. Allows the selection of three different modes: Off – always off service. On – always in service.Auto – the system is automatically actuated when the
machine travels at a speed greater than 9 km (6 mph).
11 Transmission Neutralizer Lockout Switch. Rocker switch that locks out the neutralizer. Defaults back to neutralizer “on” upon machine start up.
4
裝載機(jī)
裝載機(jī)是一種主要用于向另一種機(jī)械（自卸車(chē)、輸送皮帶、鐵路運(yùn)輸車(chē)輛等）“裝載”物料的建設(shè)機(jī)械（工程車(chē)輛）設(shè)備。裝載機(jī)主要用于向卡車(chē)裝載物料，以及鋪設(shè)管道、清理碎石和挖土等工作。作為挖土作業(yè)裝載機(jī)不是最有效的機(jī)械，與挖掘機(jī)不同，裝載機(jī)不適用于輪胎支承面以下較深處的挖掘作業(yè)。裝載機(jī)的深底鏟斗一般可裝載3～6立方米的土壤。鏟斗前置裝載機(jī)的斗容量遠(yuǎn)大于挖掘裝載機(jī)的斗容量。裝載機(jī)不屬于鏟土運(yùn)輸機(jī)械，因其主要用途并非土方運(yùn)輸。
盡管履帶式裝載機(jī)是普遍的，但與大多數(shù)推土機(jī)不同，大多數(shù)裝載機(jī)是輪式的而并非履帶式。履帶式裝載機(jī)適用于棱角銳利的建筑材料會(huì)破壞橡膠輪胎的場(chǎng)合，或者在松軟泥濘道路上的作業(yè)。輪式裝載機(jī)具有良好的機(jī)動(dòng)性和較高的工作速度，并且不像履帶那樣破壞鋪裝路面，但其所能提供的牽引力較小。
與安裝前置鏟斗的標(biāo)準(zhǔn)拖拉機(jī)不同，許多大型裝載機(jī)不使用汽車(chē)轉(zhuǎn)向機(jī)構(gòu)。取而代之，它們通過(guò)液壓驅(qū)動(dòng)的安裝于前、后橋之間的轉(zhuǎn)向鉸接裝置轉(zhuǎn)向。這種轉(zhuǎn)向稱(chēng)為“鉸接轉(zhuǎn)向”，它可使前橋固定，并使其承受更大的重量。對(duì)于一定的軸距鉸接轉(zhuǎn)向提供了較好的機(jī)動(dòng)性。由于前輪與工作裝置繞同一車(chē)軸旋轉(zhuǎn)，駕駛員在使機(jī)械定位后可使鏟斗沿弧線(xiàn)“轉(zhuǎn)向”，這一點(diǎn)是實(shí)用的。
裝載機(jī)的工作裝置可以是更換式的或者是固定安裝。鏟斗常?？捎闷渌b置或工具更換，例如，許多裝載機(jī)可以安裝叉車(chē)工裝提升重型貨物或者裝運(yùn)集裝箱，裝備液壓開(kāi)啟式“蛤殼”型鏟斗可以使裝載機(jī)像推土機(jī)或鏟運(yùn)機(jī)一樣作業(yè)。
在各種建筑工地上裝載機(jī)也經(jīng)常用來(lái)近距離轉(zhuǎn)運(yùn)建筑材料，例如磚塊、管材、鋼筋、各種挖掘工具等。借助鏟斗或除雪鏟，裝載機(jī)也用于除雪作業(yè)，但通常使用除雪裝置。它們用來(lái)清除街道、公路和停車(chē)場(chǎng)上的積雪。有時(shí)用裝載機(jī)將積雪裝載到自卸車(chē)上進(jìn)行運(yùn)輸。
近20年來(lái)，特別是在城市建設(shè)工程和小型土方運(yùn)輸工程中，裝載機(jī)獲得了普遍的應(yīng)用。許多工程車(chē)輛制造商可生產(chǎn)多種類(lèi)型的裝載機(jī)，其中最知名的有約翰迪爾、卡特彼勒、凱斯、沃爾沃、小松和利勃海爾等品牌。
下面我們將介紹卡特938GII系列輪式裝載機(jī)。
發(fā)動(dòng)機(jī)
這個(gè)938GII提供更大的動(dòng)力，優(yōu)良的燃油經(jīng)濟(jì)性，并減少維修。
渦輪增壓，ATAAC。渦輪增壓使包裹著更大密度的空氣進(jìn)入汽缸以便更完全的燃燒，更少的排放物。ATAAC提供了一個(gè)獨(dú)立的冷卻空氣進(jìn)氣系統(tǒng)。ATAAC系統(tǒng)通過(guò)冷卻進(jìn)氣空氣使更完全的燃燒從而減少煙氣的排放。
恒定的凈功率 :該938G II的電子引擎集成了可調(diào)節(jié)散熱風(fēng)扇。不管什么樣的工作條件，發(fā)動(dòng)機(jī)風(fēng)扇補(bǔ)償了變化的負(fù)載，并提供恒定的凈馬力。一個(gè)恒定馬力的“工作”狀態(tài)被提供并且燃料消耗降低。
換油周期。該發(fā)動(dòng)機(jī)機(jī)油更換間隔增加至 500小時(shí)（用CH - 4油），降低了成本和停機(jī)時(shí)間。該3126B ATAAC發(fā)動(dòng)機(jī)提供119千瓦（160馬力）的凈功率，并符合美國(guó)環(huán)保署2級(jí)排放標(biāo)準(zhǔn)。其先進(jìn)的系統(tǒng)在燃料管線(xiàn)上保持低壓，直到它被注入氣缸。燃油壓力產(chǎn)生液壓從電子控制模塊中做出響應(yīng)信號(hào)。
電子控制模塊：先進(jìn)的柴油引擎模塊燃料系統(tǒng)是一種專(zhuān)有的電子控制模塊，它提供了改進(jìn)的發(fā)動(dòng)機(jī)響應(yīng)和燃油效率，再加上先進(jìn)的診斷減少了排放量。爬坡能力提高到三千零五十零米（10,000英尺）。ADEM III 允許電子發(fā)動(dòng)機(jī)一體化使傳動(dòng)系傳輸效率最高。
傳動(dòng)系統(tǒng)
卡特動(dòng)力系統(tǒng)先進(jìn)可靠，省油。 電子式動(dòng)力換擋變速器.電子式自動(dòng)換擋變速箱自動(dòng)換擋能力是一個(gè)被卡特彼勒建成的中間軸設(shè)計(jì)。它是電子控制，并允許全功率的變化和方向變化。充分調(diào)制換檔有助于提高操作員舒適性和元件壽命。
電子離合器壓力控制（ECPC）。來(lái)自傳動(dòng)裝置和操作員在駕駛室控制的感官輸入通過(guò)各比例電動(dòng)液壓閥來(lái)調(diào)制離合器。這就有了換檔順暢和改善換擋質(zhì)量這樣的結(jié)果。能源被調(diào)制到離合器中，使離合器的壽命較長(zhǎng)。
綜合制動(dòng)系統(tǒng)：新的G II系列，IBS集成低速變速器進(jìn)入左邊的剎車(chē)踏板。 IBS提供平穩(wěn)，更大范圍的可調(diào)節(jié)性能優(yōu)化的傳動(dòng)裝置。綜合制動(dòng)系統(tǒng)還能通過(guò)減少車(chē)軸油的溫度降低生產(chǎn)費(fèi)用，那可以延長(zhǎng)制動(dòng)器壽命成本。
便于維修：通過(guò)被防護(hù)的觀測(cè)計(jì)從接觸面檢查每日傳動(dòng)油油位.一個(gè)油采樣閥門(mén)允許快速，清理傳動(dòng)裝置進(jìn)口為獲得S?O?SSM油液分析。
冷卻系統(tǒng)
新的GII系列II散熱器冷卻封裝減少堵塞，提高燃油效率。
反向流動(dòng)?？諝馔ㄟ^(guò)后部進(jìn)入，從頂口和側(cè)口排出。后方的氣流從地面帶來(lái)更少的污物，減少堵塞。
改進(jìn)的系統(tǒng)通道。938GII添加了個(gè)擺動(dòng)刷，液壓油冷卻器和空調(diào)冷凝器更容易清洗。打開(kāi)側(cè)板，允許磁芯的兩面都被清洗。重型機(jī)載碎片水箱護(hù)罩與4毫米齒孔，作為附件提供。
風(fēng)機(jī)。電控變速風(fēng)機(jī)調(diào)節(jié),以滿(mǎn)足需求的不同冷卻要求的機(jī)器。風(fēng)扇速度取決于油、冷卻介質(zhì)及進(jìn)口氣管的溫度。在較涼的操作條件下,平均風(fēng)速減小,導(dǎo)致更少的燃料消耗,降低噪音,更少的散熱器堵塞。
散熱器核心單元：新單元散熱器帶有方波成形散熱片.更低密度的散熱器散熱片讓核心碎片更容易通過(guò)。
環(huán)境特征
卡特注重環(huán)境和持續(xù)發(fā)展創(chuàng)意的解決方案。
低廢氣排放。卡特3126B ATAAC引擎在938GII使用的是一種低排放發(fā)動(dòng)機(jī)，以滿(mǎn)足二
級(jí)排放法規(guī)。它是電子控制，ATAAC為更有效率和更清潔的排放量。
降低聲音。風(fēng)扇自動(dòng)調(diào)節(jié)需根據(jù)冷卻風(fēng)扇速度的要求。風(fēng)機(jī)吸收更少的馬力,從而降低環(huán)境溫度冷卻器的燃料消耗。當(dāng)風(fēng)機(jī)減緩時(shí)聲級(jí)也減小。又額外減少絕緣引擎周?chē)穆曇艏?jí)別。
環(huán)境流體。冷卻劑/防凍劑具有抗起泡性和抗腐蝕性能提供延長(zhǎng)服務(wù)時(shí)間間隔（6000小時(shí)），需要更少的頻繁的流體變化和處置?？照{(diào)制冷劑無(wú)氟。
操作員控制臺(tái)
在輪式裝載機(jī)操作者的舒適度和效率。
1操縱：手計(jì)量單位低受力轉(zhuǎn)向。適應(yīng)輪經(jīng)營(yíng)者的傾斜轉(zhuǎn)向柱幫助。當(dāng)需要時(shí)負(fù)荷傳感轉(zhuǎn)向指向力量通過(guò)轉(zhuǎn)向系統(tǒng)。當(dāng)不轉(zhuǎn)向,更多的發(fā)動(dòng)機(jī)功率是可用來(lái)產(chǎn)生邊緣拉力、抬升力。
2能見(jiàn)度極佳：前面的窗戶(hù)提供良好的前視和周邊的觀賞,包括機(jī)器的輪子和斗的角落。在擋風(fēng)玻璃上消除保稅玻璃框架障礙物。傾斜的引擎蓋,為尾部的機(jī)器提供了良好的能見(jiàn)度。
3指尖控制。新的試驗(yàn)輔助液壓實(shí)行控制，提供舒適，省力的操作。單桿和升降桿操縱桿FNR的開(kāi)關(guān)都作為附屬裝置提供。
4新的儀表盤(pán)。壓力表,狀況指標(biāo)和報(bào)警指標(biāo)是現(xiàn)在在中心。三級(jí)報(bào)警系統(tǒng)監(jiān)視器主要功能。該系統(tǒng)的警報(bào)的經(jīng)營(yíng)人迫在眉睫的問(wèn)題是立即用機(jī)油壓力、停車(chē)制動(dòng),燃油壓力、電力系統(tǒng)、剎車(chē)油壓力、液壓油溫度、傳輸、發(fā)動(dòng)機(jī)進(jìn)氣歧管的過(guò)濾旁路溫度、轉(zhuǎn)向油壓和空氣進(jìn)口加熱器。LED燈泡警告指標(biāo)沒(méi)有替代的。
5駕駛室口：左，右側(cè)車(chē)門(mén)打開(kāi)180度的擺動(dòng)與優(yōu)化通風(fēng)，能見(jiàn)度和地面通信閂鎖。左，右側(cè)滑動(dòng)窗口都作為附屬裝置提供。在機(jī)器的兩側(cè)為機(jī)器的安全和容易維修提供全面的服務(wù)。
6踏板：為適應(yīng)操作者的舒適度所有的踏板包括新的電子調(diào)速器被安裝。融合了全新整合的左踏板剎車(chē)制動(dòng)系統(tǒng)包含了腳踏閘，傳動(dòng)裝置，減速檔。
7寬松的空間.為便當(dāng)，冷飲器，杯子劃出隔間。
8座椅的選擇。標(biāo)準(zhǔn)的布和塑料基座椅調(diào)整6種方式。一個(gè)新的空氣懸浮座椅輪，可提高6路調(diào)整和汽車(chē)式腰部支撐的舒適性。
9電子自動(dòng)變速控制。設(shè)置為手動(dòng)或自動(dòng)換擋的兩個(gè)完全模式之一。
10行駛控制系統(tǒng)開(kāi)關(guān)：減小了縱長(zhǎng)及校平器縱長(zhǎng)節(jié)距便于更舒適的乘坐。允許在三種不同的模式選擇：關(guān)閉 - 始終關(guān)閉服務(wù)。開(kāi)啟 - 總在服務(wù).自動(dòng) - 系統(tǒng)會(huì)自動(dòng)啟動(dòng)的當(dāng)機(jī)的速度超過(guò)9公里（6英里）或更大的速度。
11傳輸力合器和鎖定開(kāi)關(guān)。蹺板開(kāi)關(guān)，鎖定力合器。力合器回到默認(rèn)值，機(jī)器啟動(dòng)起來(lái)。
收藏