【正文】 e industry gear dispersed than in the past. Identification of research results and new products are identified with the various ministries and provinces by the government sector organizations identification, reporting and appraisal. China Gears professional associations under the Ministry of Machine spirit of the document, starting from 1995, so statistics and analysis. 1998 gear research and new products are summarized as follows : Sedan car transmission gear technology is the major representative level, Shanghai Automotive Gear Transmission Plant in 1013 on the basis of its own research and development of a 330type transmission. for Shanghai Volkswagen Santana 2000GS1 (era Superman) cars. 330transmission and Superman era, according to a Die engine matching, Carrying capacity than 013 transmission increased 10%, the dynamic performance has improved significantly.A public Jetta cars and 020 Audi 012 transmission, the ZX Fukang Shenlong the transmission, Shanghai GM39。s product mix and structural changes in larger enterprises, such as : FAW Group two internal gear box and Axle Plant, separated from the plant to a subsidiary products are pletely Group for the general assembly of the society to provide support or accessories to enhance the petitiveness of enterprises to participate in the market39。s biggest producer of gear the ranks. (1) Vehicles Gear : Characteristics of gear specifications little change size range, product yield and easy professional organizations, scale production. Over the last 10 years. Gear production enterprises have broken the original vehicle, engineering, agricultural machinery, and military Chief attribution products division limit restrictions, In accordance with the market demand is the adjustment of product structure, many of the original farm machinery manufacturers gear, military industrial enterprises Nissan Motors change gears Mechanical engineering gear, motorcycle gear. Private township enterprises have joined the vehicles, farm trucks, tractors, motorcycles, gears and production teams. formation of a number of plant varieties of products to meet market the product structure. China39。China International Machinery mon parts and special equipment exhibition. Including gear bearings and exhibitions. It standardized the biennial exhibition of market transactions. International Exhibition and sale transactions of convergence. 30 years after the liberation of the planned economic system, China has spent a huge amount of foreign exchange, the introduction of a lot of gearcutting machines and Measuring Instruments, Gear products has not been well. The key problem is lack of specialized production and no standard market petition. 1980s to the 1990s, China39。 參考文獻(xiàn)【1】：華中科技大學(xué)出版社，【2】成大先.《機(jī)械設(shè)計手冊》化學(xué)工業(yè)出版社，第三版，第三卷，；【3】：哈爾濱工程大學(xué)出版社，2003【4】：機(jī)械工業(yè)出版社，【5】王知行、：高等教育出版社，2000.【6】王明珠《工程制圖學(xué)及計算機(jī)繪圖》，國防工業(yè)出版社，1998年8月第一版；【7】:機(jī)械工業(yè)出版社, 【8】：華中科技大學(xué)出版社，【9】（下冊）.北京：煤炭工業(yè)出版社，【10】：機(jī)械工業(yè)出版社，【11】李 ：遼寧科學(xué)技術(shù)出版社，【12】：機(jī)械工業(yè)出版社，【13】：哈爾濱工程大學(xué)出版社，2003外文資料Gear and gearboxGear and gearbox (collectively Gear products) is the key industrial machinery based pieces, Almost all the outfits mechanical drive ponents are inseparable from Gear. As China gears enterprise under the planned economic system, have long been scattered in the original machinery industry (hereinafter referred to the Department of Mechanical) of the Industrial Development Bureau and the seven other eight Ministry of Industry related departments Management was scattered in the large and allembracing, small side of the mechanical factory production. Fragmentation, with all the departments of gear product standardization, specialization and market development. Gear industry research, standards, centralized intelligence work by mechanical science research center at the Zhengzhou Zhengzhou move machinery Institute. Gear specialization and the rapid development is only 20 years of reform and opening up things. In the past the government statistics, there is no plete statistics gear products. No sector can stand gear industry point of view, the analysis of gear products in the market good, Looking entire gear market development prospects. 1986 by the Ministry of mechanical apparatuses and joint investment in Zhengzhou Institute of mechanical preparation of national product quality gear Supervision and Test Center, and start a national Gear product quality supervision and sampling. 1989 documents issued by the Ministry of MachineBuilding Industry, set up a crosssectoral, Interministries of China Machinery Industry Association generic parts gear professional associations, Secretariat is located in the Department of Mechanical machinery Zhengzhou Institute. 1992 by the Ministry of Machine and the government of Henan Province below electromechanical Health (1992) No. 2069 set up When the Zhengzhou gear products and highlevel technical transactions, Deputy Minister Sun Changji Zhengzhou made a special trip to the ribboncutting. He Guangyuan Minister inscription for the market opened. 1995 by the China Association of gear mechanical assistance, prepared by the Ministry of Austin first gear industry on September 5 plan. Machinery in 1997 by the Ministry of Science and Technology Commission of China and the Association of gear published a joint editorial of the China39。因此這次設(shè)計增加了我們綜合運用所學(xué)知識，解決實際問題的能力。同時也發(fā)現(xiàn)了許多過去存在的問題，例如：計算與較核齒輪，查有關(guān)手冊等等，經(jīng)過同學(xué)之間相互幫助，以及知道老師認(rèn)真幫助講解，終于克服了設(shè)計中的許多問題，順利完成了設(shè)計任務(wù)。結(jié) 束 語 至此，全部設(shè)計任務(wù)均已完成，共繪制裝配圖，零件圖編寫說明書，三項任務(wù)。（四）技術(shù)特性表和技術(shù)要求技術(shù)特性表說明變速箱的主要性能參數(shù)、精度等級、表的格式參考書，布置在裝配圖右下方空白處。查【6】。安裝尺寸：變速箱箱體底面的長與寬、間距及其通孔直徑、外伸軸端的直徑、配合長度及中心高等。查表可知。配合尺寸：變速箱中有配合要求的零件應(yīng)標(biāo)注配合尺寸。（二）尺寸的標(biāo)注特性尺寸：用于表明變速箱的性能、規(guī)格和特征。布置視圖時應(yīng)注意：a、整個圖面應(yīng)勻稱美觀，并在右下方預(yù)留變速箱技術(shù)特性表、技術(shù)要求、標(biāo)題欄和零件明細(xì)表的位置。二、變速箱裝配圖的繪制（一）視圖布局選擇3個基本視圖，結(jié)合必要的剖視、剖面和局部視圖加以補充。放油孔及放油螺塞：為排放變速箱箱體內(nèi)污油和便于清洗箱體內(nèi)部，在箱座油池的最低處設(shè)置放油孔，箱體內(nèi)底面做成斜面，向放油孔