【正文】 ar box production plants maximum speed reached 67 min. The maximum speed of 168 round Gear m / s, the largest power transmission 44 kW. Chongqing gearbox Limited production of highpower marine gearbox series, the tube mill gearbox JS series can replace imported products. and enter the international market. CITIC heavy machinery panies slowdown yard at slow speed, high torque drive the development of new products in recent years has achieved significant results, If ZJ2240 planetary gear reducer (2 kW power transmission), Commodities water for the dam the largest domestic 4 5000 N Main Drive SZJ3500 shiplift reducer. Press the main transmission TD5 reducer. Drawing of the main transmission perforation KF300 reducer (transmission torque three kN ? m) are the nation39。s largest lowspeed Heavy gear.(3)Gearbox automotive transmission lines one of the most important ponents. Its purpose is to : 1. In the larger context of change in vehicle speed and the size of vehicles driving wheel torque on the size. As for the driving of motor vehicles, require vehicle speed and driving torque to a very great extent changes. For example, in highspeed roads should be able to achieve a speed of 100 km / h, while in urban areas, often at a speed of 50 km / h or so. Empty in the straight on the road traveling, traveling resistance is small, then when loaded uphill, it will greatly resistance. And the characteristics of a car39。s engine speed range is smaller, and the torque range can not meet the actual needs of the traffic. 2. Vehicle achieve reversing engine crankshaft are usually only one direction to the rotation. Vehicle sometimes needs to be regressive moving, it is often used to set up the gearbox to achieve Reverse reversing moving vehicle. 3. When achieving free clutch engagement, the gearbox can output power. For example, we can guarantee that the driver of the engine flameout when the clutch pedal is released from the driver seat. Gearbox Transmission by the variable speed control agencies and organizations posed of two parts. Transmission of primary role is to change the torque and rotational speed and direction of the numerical。 manipulation of the primary role is to control the drive to achieve Transmission than the transformation, namely shift, to achieve variable speed and torque. Mechanical gearbox main application of gears deceleration principle. Simply put, there are more group gearbox transmission ratio different gear and vehicles running the shift, is through the manipulation of body so that different transmission gears work. If at low speed, transmission gear than the deputy, and in highspeed, the drive to allow more than a small gear work (4)Gearbox PrincipleAutomotive Transmission, posed by the size of gear, according to the size Arrange tower. Generally, the transmission shaft has four ponents, the firstaxis is the driving force entered the shaft, and in the clutch, As long as the clutch pedal lifted, it will turn and the engine speed synchronization. 2ndaxis in the bottom of transmission, a gear with the first axis of a tooth meshing forever, to follow, Inside are many different sizes of gear. 3rdaxis and the firstaxis concentric placement, the above gears of different sizes can slide around, and the second shaft gear meshing different and the speed and torque. The third axis is the driving force output shaft. 4thaxle shaft is reversing, the secondaxis rotation to the reverse, a gear must be increased. The specialized gear installed in a shaft.Transmission gears meshing forever, with oblique teeth, why choose Bevel, which is on a mohel. Sliding, with the role of speed, which can be used straight teeth. Now the auto gearbox, the general installation Synchronizer, is to avoid variable stalls gear damaged, easily meshing success. Because Synchronizer plex structure, increase costs, generally installed in highspeed stall, Luxury Car will all have installed synchronizer, Of course you paid the bill Matata This is disassemble the transmission lid, the left side of the clutch, a Bevel is the first axis. Below the second axis invisible, except that the first axis gear, and the remaining third is all the gear shafts, From this we can also see the third axis is very long. The first is a hollow shaft, one end of the third axis to insert the hollow shaft of the first to support themselves.A small teeth, synchronizer, thick small teeth Synchronizer is a symbol. Gear raw edge of the groove and shiny, like pork on a skewer is the location of speed, speed gearbox driven fork around Mobile, Gear makes around Mobile.Transmission at the same time, there can be only one pair of meshing gears, otherwise we will not be turning the dead. This task is achieved by the transmission lid. Transmission build simple structure, nothing hightech, but it is full of wisdom, very clever and decided to speed fork movement. Machinery is the case, a stress Qiao Jing. Simple things can be plicated mission, another example is the firearms, nothing above circuit boards, The movement is the crystallization of wisdom 中文翻譯齒輪及變速箱齒輪及齒輪變速箱（統(tǒng)稱齒輪產品）是機械工業(yè)的關鍵基礎件，幾乎所有機械成套裝備的傳動部件都離不開齒輪。鑒于中國的齒輪企業(yè)在計劃經濟的體制下，長期被分散在原機械工業(yè)部（以下簡稱機械部）的七個工業(yè)局與其他八個工業(yè)部的相關部門中管理，被分散在大而全小側全的機械工廠中生產。條塊分割、部門所有阻礙了齒輪產品的標準化、專業(yè)化、市場化發(fā)展。齒輪行業(yè)的科研、標準、情報的歸口工作由機械科學研制院分遷鄭州的鄭州機械研究所承擔。齒輪的專業(yè)化、市場化的快速發(fā)展只是改革開放二十年的事。在過去的政府統(tǒng)計資料中，沒有完整的齒輪產品統(tǒng)計項目。沒有哪個部門能站在齒輪行業(yè)的角度，分析齒輪產品的市場善，展望整個齒輪市場的發(fā)展前景。1986年由機械部與國家技術監(jiān)督局聯合投資在鄭州機械研究所籌建了國家齒輪產品質量監(jiān)督檢測中心，開始了國家齒輪產品質量的監(jiān)督性抽查。 1989年由機械部發(fā)文，成立了跨行業(yè)，跨部委的中國機械通用零部件工業(yè)協會齒輪專業(yè)協會，秘書處設在機械部鄭州機械研究所。 1992年由機械部與河南省政府聯合下文以機電生（1992）2069號文成立了面向全國的鄭州齒輪產品與技術交易高層孫昌基副部長專程來鄭州剪彩。何光遠部長為市場開業(yè)題詞。1995年由中國齒輪專業(yè)協會協助機械部編制了 甸第一部齒輪行業(yè)九五規(guī)劃。 1997年由機械部科技委與中國齒輪專業(yè)協會聯合編輯出版了我國第一本《中國齒輪產品目錄》，這本目錄是目前全面反映齒輪行業(yè)產品善、資料最人、信息量最大的工具書。1997年機械部在北京舉辦了9739。中國國際機械通用零部件及專用裝備展覽會。包括齒輪與軸承展覽。它規(guī)范了兩年一次的市場交易展覽。與國際展覽展銷的交易方式接軌。解放后三十多年的計劃經濟體制下，我國花了大量外匯，引進了大量齒輪加工機床與量儀，齒輪產品水平并沒有上去。問題的關鍵是缺少專業(yè)化生產，沒有規(guī)范的市場競爭。