畢業(yè)論文-奇瑞微型汽車懸架系統(tǒng)設(shè)計-資料下載頁

　　

【正文】 成這個設(shè)計是難以想象的。 在這里首先要感謝我的導(dǎo)師 。 老師平日里工作繁多，但在我做畢業(yè)設(shè)計的每個階段， 無論是在設(shè)計的選題、數(shù)據(jù)的計算，還是圖紙繪制，都得到了老師極大的幫助和指導(dǎo) 。我的設(shè)計較為復(fù)雜煩瑣，但是老師仍然細(xì)心地糾正圖紙中的錯誤。除了敬佩老師的專業(yè)水平外，他的治學(xué)嚴(yán)謹(jǐn)和科學(xué)研究的精神也是我永遠(yuǎn)學(xué)習(xí)的榜樣，并將影響我今后 在 學(xué)習(xí)和工作 當(dāng)中的態(tài)度 。 感謝所有的同學(xué) 對我的幫助，在緊張的學(xué)習(xí)和工作 中，與各位同學(xué)的交流，不僅使我得以 開闊了思路， 并且得到了 許多有益的幫助和啟示， 在這當(dāng)中我 感受到了真實的快樂 與充實 。 然后還要感謝大學(xué)四年來所有 教育我們 的老師， 想起自己的老師，我自己十分受感動，他們就像對自己子女一樣對待我們。嚴(yán)謹(jǐn)?shù)膽B(tài)度和教育的方式都是我應(yīng)該銘記在心的。由衷的感謝我的老師謝謝！ 最后感謝我的母校 — 遼寧工業(yè)大學(xué) 四年來對我的大力栽培。 本科生畢業(yè)設(shè)計（論文） 31 附錄 Ⅰ Automobile Suspension Since the automobile invention, The engineers have been studying design of automobile39。s suspension system well. The initial automobile suspension system will be uses horsedrawn vehicle39。s elastic steel plate, the effect will not be good. In 1908 the coil spring started to used in the passenger vehicle, at that time once had two entirely different opinions. The first opinion position installment rigidity big coil spring, causes the wheel is maintaining with the road surface contact tendency, enhances the tire to stress ability. When such malpractice is rides the automobile has intensely jolts the feeling. Another opinion thought that should use the soft helical spring, adapts the rugged road surface, enhances rides time automobile39。s stability and fortableness. But such manuverability of automobile is bad. 3040 ages, the independent suspension fork started to appear, and obtains the very big development. Shock absorber also by early friction type development for fluid strength type. These improvements enhanced the suspension fork performance without doubt, but regardless of how to improve, this time39。s suspension fork still belonged to the passive form suspension fork, still had the very big limitation in many aspects. But with the lapse of time, the industry unceasing development, suspension system39。s structure renews unceasingly, causes the automobile and in the smooth performance enhances unceasingly at fortableness. The automobile suspension fork to full has consummated the enhancement in process, which below introduced is quite now advanced, has the European blood relationship suspension fork series. MacPherson Strut or McPherson strut This is currently, without doubt, the most widely used front suspension system in cars of European origin. It is simplicity itself. The system basically prises of a struttype spring and shock absorber bo, which pivots on a ball joint on the single, lower arm. At the top end there is a needle roller bearing on some more sophisticated systems. The strut itself is the loadbearing member in this assembly, with the spring and shock absorber merely performing their duty as oppose to 本科生畢業(yè)設(shè)計（論文） 32 actually holding the car up. In the picture here, you can39。t see the shock absorber because it is encased in the black gaiter inside the spring. The steering gear is either connected directly to the lower shock absorber housing, or to an arm from the front or back of the spindle (in this case). When you steer, it physically twists the strut and shock absorber housing (and consequently the spring) to turn the wheel. Simple. The spring is seated in a special plate at the top of the assembly which allows this twisting to take place. If the spring or this plate are worn, you39。ll get a loud 39。clonk39。 on full lock as the spring frees up and jumps into place. This is sometimes confused for CV joint knock. ?Rover 2021 MacPherson derivative During WWII, the British car maker Rover worked on experimental gasturbine engines, and after the war, retained a lot of knowledge about them. The gasturbine Rover T4, which looked a lot like the Rover P6, Rover 2021 and Rover 3500, was one of the prototypes. The chassis was fundamentally the same as the other Rovers and the result was the the 2021 and 3500 ended up with a very odd front suspension layout. The gas turbine wasn39。t exactly small, and Rover needed as much room as possible in the engine bay to fit it. The suspension was derived from a normal MacPherson strut but with an added bellcrank. This allowed the suspension unit to sit horizontally along the outside of the engine bay rather tha n protruding into it and taking up space. The bellcrank transferred the upward forces from the suspension into rearward forces for the spring / shock bo to deal with. In the end, the gas turbine never made it into production and the Rover 2021 was fitted with a 2litre 4cylinder engine, whilst the Rover 3500 was fitted with an 39。evergreen39。 V8. Open the hood of either of these classics and the engine looks a bit lost in there because there39。s so much room around it that was never utilised. The ima ge on the left shows the Roverderivative MacPherson strut. ?? 本科生畢業(yè)設(shè)計（論文） 33 Double wishbone suspension systems. Coil Spring type 1 This is a type of doubleA or double wishbone suspension. The wheel spindles are supported by an upper and lower 39。A39。 shaped arm. In this type, the lower arm carries most of the load. If you look headon at this type of system, what you39。ll find is that it39。s a very parallelogram system that allows the spindles to travel vertically up and down. When they do this, they also have a slight sidetoside motion caused by the arc that the wishbones describe around their pivot points. This sidetoside motion is known as scrub. Unless the links are infinitely long the scrub motion is always present. There are two other types of motion of the wheel relative to the body when the suspension articulates. The first and most important is a toe angle (steer angle). The second and least important, but the one which produces most pub talk is the camber angle, or lean angle. Steer and camber are the ones which wear tyres. Coil Spring type 2 This is also a type of doubleA arm suspension although the low