客货两用车的前悬架与转向系统设计精选资料.docVIP

客货两用车的前悬架与转向系统设计 ks ,I work hard to get the more useful information to do my work better. With the helping of Mr Li and other teachers ,and observation on vehicle in laboratory .I got a conclusion : the front independent McPherson suspension is the best form for this automotive . All focus on elastic part .Because elastic is the most important part in them .And I have got some important data for my design work . If I can’t get those data ,I could not do my work in the following days .I get many data ,but for front independent McPherson suspension the main thing is about spring , such as spring rate ,middle diameter ,spring wire diameter and so on .spring rate is the most important data for my independent suspension ,it do many influence about suspension. In the last I discussion shock absorber and anti-roll-bar a little,and involve the basic of them and the important usefully in modern car’s suspension.Because the motortcar we design is a kind of small output volume, seeing that the gradual improvement of the road surface quality of our country and effort of acting on the steering wheel are not very large, so I choose the manual steering system. Compared with others steering gear, though the negative efficiency of the rack and pinion steering gear is high, but it have of simple structure, compactness, shell adopt aluminum alloy or magnesium alloy die casting, the weight of the rack and pinion steering system is much smaller than others, transmission efficiency is up to more than 90%, so in this design I choose the rack and pinion steering system.Because the front overhang of the car is very short and the engine occupied comparatively very big space, what is more, the minimum transmission angle of the Ackerman steering has a very close relation with installation distance of the steering gear, so I choose fit the Ackerman steering in the back of the car conceding all those factor above.KEY WORDS : independent suspension,MacPherson，the manual steering system, the rack