【正文】 variable speed and automation, in general, improve the production efficiency of roller paction and quality. Now foreign markets have seen very little mechanical transmission of the roller. Hydrostatic drive technology in the 1970s began to use bulldozers, and will soon be extended to a number of small and medium bulldozers and loaders, the United States John Deere, Caterpillar, Germany Bohai benefit panies and Dole produced by Komatsu of Japan has production and sales pushed Temple hydraulic machines and loaders. Hydrostatic drive not to use hydraulic torque converter, which dispense with the left lane and brake parts and mechanical drive, use of a safety valve on mechanical and hydraulic systems overload protection, and the index of smaller power play biggest index, its remaining power available in the auxiliary machinery operation. German pany Deutsche mark and Lee Bohai Fall of other public panies in 1954 and in 1955 took the lead in developing a hydraulic excavator , but the hydrostatic transmission in large excavator is the popularization and application of the 1970s. Since the early 1980s, excavators and subdivided, is gradually realized powered, rotary and the hydraulic excavator of. In the international market excavators, were all eliminated various mechanical drive. Late history of the birth of the road is more mechanical hydraulic drivebased, such as paver, soil stabilizer, Pavement milling machine, hydraulic transmission smoothness help improve the quality of the roads paved. Drilling in the car and drilling machines, hydraulic transmission has replaced the previous aerodynamic, Wheeled modern cranes and machinery also piling work to the whole in the direction of hydraulic development. Electricity in industrial production while the application has a long 5 history, but in mobile machinery is seldom used. This is because, firstly, to the motor capacity of, a motor with the same power as pared to the hydraulic motor, its weight and bulk to good times, to the machinery space layout brought great difficulties. In addition, the efficiency of electrical transmission over low efficiency and consumption of a large volume of nonferrous metals. But electric drive can be well realized variable speed, braking and electrical power streaming Drive more convenient and easy to large tub, large excavator and large loaders, enginegeneratorelectric wheels will transfer power. Germany Vogele also been developed for electric power will transfer wheel. Germany Vogele also been developed electric drive an asphalt paver, the aircraft39。 Caterpillar loader routine maintenance to shorten the time . 100 hours use of the technical maintenance for only 67min. Creative : industrial design with the environment Modern science and technology of highspeed development, promoting 7 social progress, for humanity to a high degree of material civilization and spiritual civilization. Industrial design is the product of industrial product design, product also known as the art form. Mechanical Products art forms should be able to demonstrate its function in a rational and external quality of uniformity, the product should reflect the advanced technology and meet the aesthetic requirements of modernity. For mechanical engineering, said it was a Paper goods sold, That is an exaggeration, but not to modeling design is certainly not desirable. Modeling the mechanical engineering design of the machine can shape their structure, function and use requirements, paying and with the psychological and physical coordination. This modeling design should include ministries of proper body fluid, color coordination, Instrumentation layout beautiful and easy to operate and intuitive sign in the trademark symbol. Now the world39。 ④ with automated monitoring and selfrevision process functions。電子技術(shù)、微電腦、傳感器、電液伺服與控制系統(tǒng)集成化改造了傳統(tǒng)的工程機械產(chǎn)品，計算機輔助設(shè)計、輔助制造及輔助管理裝備了工程機械制造業(yè)， IT 網(wǎng)絡(luò)技術(shù)也裝備了工程機械的銷售與信息傳遞系統(tǒng)，從而讓人們看到了一個全新的工程機械行業(yè)。 振動壓路機是利用機械振動而又要達成 “ 振地不振人 ” 作業(yè)效果的最有力說明。這其中的找平技術(shù)也可以應(yīng)用到平地機上，作為地平或坡面的精細找平。 靜液壓傳動技術(shù)于 70 年代開始應(yīng)用到了推土機上，并且很快推廣到了一些中小型推土機和裝載機上，美國約翰 電力在工業(yè)生產(chǎn)中的應(yīng)用雖然已有很長的歷史了，但在移動式機械上使用尚不多見。人機工程學(xué)是 “ 以人為本 ” 的設(shè)計思想，注重機器與人的相互協(xié)調(diào)，提高人機安全性、駕駛舒適性，方便于司機操作和技術(shù)保養(yǎng)，這樣既改善了司機的工作條件，又提高了生產(chǎn)效率 ，有的國家對工程機械的振動、噪聲、廢氣排放和防翻滾與落物制定了新的標準，甚至付諸法律。 美國消音技術(shù)公司研制了一種電子消音器，通過電子儀器分析發(fā)動機排氣噪聲的波形結(jié)構(gòu)，并產(chǎn)生一種與之相位差 180176。機械產(chǎn)品的藝術(shù)造型應(yīng)能體現(xiàn)其功能的合理性及外在質(zhì)量的統(tǒng)一性，還應(yīng)體現(xiàn)出產(chǎn)品的技術(shù)先進性和符合時代感的審美要求。駕駛方向盤的高度與傾角可調(diào)，選用舒14 適的高靠背可調(diào)減振座椅，給駕駛員準備了良好的操作環(huán)境。 機電信一體化并非機電與信息技術(shù)的簡單結(jié)合，它所構(gòu)成的系統(tǒng)必須具備 5 項功能： ① 具有檢測和識別工作對 象與工作條件的功能； ② 具有根據(jù)工作目標自行作出決策的功能； ③ 具有響應(yīng)決策、執(zhí)行支動作的功能； ④ 具有自動監(jiān)測工作過程與自我修正的功能； ⑤ 具有自 z 身安全保護和故障排除功能