三速變速箱設(shè)計畢業(yè)設(shè)計(文件)

　

【正文】 he Association of gear published a joint editorial of the China39。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。s largest farm machinery and farm vehicles Gear Works. From 19951998, the total output value has been increasing annually, in 1998 reached 370 million yuan. (2) Industrial Gear : namely, various sets of machinery and equipment supporting small batch production or single pieces of gear with the gear box, collectively industrial gear. Its characteristics are single pieces, small quantity and variety, the difficulty of creating big difference, from the accuracy of 101. Modulus from ~ 50mm in diameter from a few mm to 15mm, as a multipurpose industrial gear, multiple varieties and production plants scattered. ① general industrial gear, including a variety of tooth with a variety of mon gearbox, it applies to mass production lines, sales. For the type of machinery production lines matching outfits. ② industrial park gear, mainly referring to the specific work of special machinery cut (by) Speed box, or dissolution of the unit and the integration of the variable speed drive system. ③ gear and related products have given their lives for the tooth profile products, such as tooth coupling, special profile pump, screw pressor In recent years, professional and series production has been greatly developed. Therefore the study of the industrial gear product mix, as it rallied gear related products for statistical analysis. With the development of market economy. Gear production of professional, largescale production of nearly 20 years have witnessed great development. Since the beginning of 1995 by the China Association statistics Gear Gear industry ranking, the overall sales growing scale. Given the 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 industrial gearbox generic products, and in 1998 took aim at the world39。 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