附 录Rumsfeld diaphragm spring clutch of productionCar exquisite machine that mankind create, it change and change world of us. At present, the car recoverable amount in the whole world passes over 700 million ownly. Since entering the WTO, the auto industry of our country has demonstrated the momentum developed at full speed, the status in our countrys national economic development of auto industry comes more and more outstandingly, own through becoming the pillar industry of our country. Science and technology is the first productivity of promoting the development of society, accelerate sending in the auto industry of our country Paces of the exhibition, further shorten with the disparity among the trades of developed country, standing in the breach will strengthen science and technology Input, improve the independent innovation ability of enterprises. With the development at full speed of science and technology, the performance of the car engine is improved rapidly. Rotational speed of the engine that at present and spraining The square is generally relatively high, such as 05 sections of maximum power 78KW/5750rpm of Citroen zx, the biggest torsion 42Nm / 420rpm BMW53oi maximum power 170KW/5900rp m, the biggest torsion 300Nm/3500rpm; The torsion change is with the treasure 5 series of horse are examples, in 1983, its biggest torsion of engine was 206Nm, rose to by 2003 500Nm, in 20 years, its torsion increased by 1 time. Should pay attention to footboard strength and engine of the car clutch The torsion is directly proportional to, the increase of the torsion leads to the fact footboard strength increases; And the increase of footboard strength, will cause the driver to be easy Reduce appropriately. So improve in the performance of the car engine - Under the situation that the torsion increases, how to reduce the vapour Car footboard strength of clutch, comfortableness to raise driver, now car clutch design, need, consider A question. Because the traditional diaphragm spring clutch is unavoidable in the course of using will be produced and worn and torn, this phenomenon Will lead to the fact that compress tightly strength to increase actually, therefore the separation strength of separating clutch increases correspondingly, enable the clutch pedal Strength increases. Diaphragm pull in the spring out of the support of the parts and no support ring or just a support ring , its structure is simpler and less the parts of the compact, the number and quality are few ； diaphragm pull spring is in central and down the offer is on the same size under the conditions for a relatively large diameter diaphragm spring, and improve the pressure force on the turn of the matrix, and dont build upon, in turn carry the same moment, but the size of the smaller structure ；In or separate state, the shape of a small, the stiffness, the more efficient ； pull in more than to push the lever type of the lever, and the supporting reduce friction loss and transmission higher efficiency, upon the lighter, in state or division, the structure of the spring and the clutch diaphragm build supporting always keep in touch, in the ring will wear support after a gap and build upon the freedom of travel, will not emerge and noise ；Longer life.拉式膜片弹簧离合器的产生汽车是人类创造的精美机器，它改变了和正在改变着我们的世界。目前，全世界汽车保有量己经超过七亿辆。入世以来，我国汽车工业呈现出了飞速发展的势头，汽车工业在我国国民经济发展中的地位越来越来突出，己经成为了我国的支柱性产业。科技是推动社会发展的第一生产力，要加快我国汽车工业发展的步伐，进一步缩短与发达国家行业间的差距，首当其冲就是要加大科技的投入，提高企业的自主创新能力。随着科技的飞速发展，汽车发动机的性能迅速提高。目前发动机转速及扭矩一般都较高，如富康05款最大功率78KW/5750rpm，最大扭矩42Nm /420rpBMW53oi最大功率170KW/5900rp m，最大扭矩300Nm/3500rpm;扭矩变化以宝马5系列为例，1983年，其发动机最大的扭矩为206Nm，到2003年就增加到500Nm，在20年中，其扭矩增加了1倍。要注意汽车离合器的踏板力与发动机扭矩成正比，扭矩的增加导致踏板力增大;而踏板力的增大，会导致驾驶员舒适度降低。所以在汽车发动机的性能提高扭矩增加的情况下，如何减小汽车离合器的踏板力，提高驾驶员的舒适性，是现在汽车离合器设计需要考虑的一个问题。由于传统的膜片弹簧离合器在使用过程中不可避免会产生磨损，这一现象会导致实际压紧力增大，因而分离离合器的分离力也相应增大，使离合器踏板力增加。拉式膜片弹簧离合器取消了中间支承各零件，并不用支承环或只用一个支承环，使其结构更简单、紧凑，零件数目更少，质量更少；拉式膜片弹簧是中部与压盘相压在同样压盘尺寸的条件下可采用直径较大的膜片弹簧，提高了压紧力与传递转矩的能力，且并不增大踏板力，在传递相同的转矩时，可采用尺寸较小的结构；在接合或分离状态下，离合器盖的变形量小，刚度大，分离效率更高；拉式的杠杆比大于推式的杠杆比，且中间支承减少了摩擦损失，传动效率较高，踏板操纵更轻便，无论在接合状态或分离状态，拉式结构的膜片弹簧大端与离合器盖支承始终保持接触，在支承环磨损后不会形成间隙而增大踏板自由行程，不会产生冲击和哭声；使用寿命更长。