机械5

摘要 座椅是与人接触最密切的部件，人们对轿车平顺性的评价多是通过座椅的感受作出的。现代轿车的驾驶者座椅和前部乘员座椅多是电动可调的，又称电动座椅。因此，电动座椅是直接影响轿车质量的关键部件之一。 轿车电动座椅以驾驶者的座椅为主。从服务对象出发，电动座椅必须要满足便利性和舒适性两大要求。也就是说驾驶者通过键钮操纵，既可以将座椅调整到最佳的位置上，使驾驶者获得最好视野，得到易于操纵方向盘、踏板、变速杆等操纵件的便利，还可以获得最舒适和最习惯的乘坐角度。为了满足这些要求，世界汽车生产大国的有关厂家都竟相采用机械和电子技术手段，制造出可调整的电动座椅。 本方案设计的电动座椅由双向电动机、传动装置和座椅调节器等组成。通过座椅调节器实现座椅水平前后移动、座椅上下移动、座椅靠背的角度旋转六个方向的调节。 汽车电动座椅的结构主要有:可逆直流微型电动机(驱动装置)、传动装置、连接机构、蜗轮、蜗杆、滚珠丝杠、水平滑动导轨等部件组合而成。座椅由坐垫、靠背、靠枕、骨架、悬挂和调节机构等组成。 关键词：汽车电器；电动座椅；蜗轮、蜗杆、螺杆 Abstract the chair is co
ntacts the closest partwith the huma
n, the people ma
ny are make to the passe
ngervehicle smooth appraisal through chair's feeli
ng. The moder
n passe
ngervehicle's driver chair a
nd the fro
nt part crew member chair ma
ny are electrically operated adjustable, also calls the electrically operated chair. Therefore, the electrically operated chair is o
ne of immediate i
nflue
nce passe
ngervehicle quality key compo
ne
nts. Passe
ngervehicle electrically operated chair by driver's chair primarily. Embarks from the target clie
nt, the electrically operated chair must satisfy the co
nve
nie
nce a
nd the comfortable two big requests. That is driver through keybutto
n operatio
n, may also adjust the chair i
n the best positio
n, causes the driver to obtai
n the best field ofvisio
n, obtai
ns easy to operate operatio
n a
nd so o
n steeri
ngwheel, footboard, gearshift lever co
nve
nie
nces, but may also obtai
n is most comfortable a
nd the most custom rides the a
ngle. I
n order to satisfy these requests, theworld automobile productio
n power's related factory u
nexpectedly uses the machi
nery a
nd the electro
nic tech
nology method, makes electrically operated chairwhich may adjust. This scheme is a ki
nd of mecha
nical desig
n a
nd ma
nufacturi
ng, ergo
nomics a
nd electro
nic tech
nology combi
ni
ng ca
n adjust the electric chair eight directio
n. Ge
neral electric chair system by two-way motor a
nd tra
nsmissio
n device a
nd seat regulator, etc. Through the seat regulator seat level moveme
nt, realize fro
nt seats a
nd seat move after the e
nd of the move, the seat of the directio
n of rotatio
n A
ngle of eight. The auto electric chair of the structure are mai
nly: reversible dc micro motors(drives), tra
nsmissio
n device, the co
n
nectio
n, A
ngle tra
nsferworm a
ndworm, ball screw, horizo
ntal slidi
ng guide etc. Electric chair cushio
n, seat, by magic, skeleto
n, suspe
nsio
n a
nd adjusti
ng mecha
nism etc. Keywords: Automotive Electrical; electric chair; turbi
ne,worm, screw 目录 摘要Ⅰ AbstractⅡ 第一章绪论- 1- 1.1综述...- 1- 1.2电动座椅设计研究的现状- 2- 1.2.1国外研究现状- 2- 1.2.2国内研究现状- 3- 1.3电动座椅设计的背景- 3- 1.4本文的主要研究工作- 3- 第二章研究方案的选取- 4- 2.1综述- 4- 2.2座椅坐垫升降部分- 4- 2.3座椅坐垫前后移动部分- 5- 2.4座椅靠背倾斜部分- 6- 第三章选用传动的特点- 6- 3.1齿轮传动- 6- 3.1.1齿轮传动特点- 6- 3.1.2齿轮传动类型- 7- 3.2螺旋传动- 8- 3.2.1螺旋传动特点- 8- 3.2.2螺旋传动类型- 8- a.滑动螺旋传动- 8- b.滚动螺旋传动- 8- 3.3空间连杆机构- 9- 第四章机构设计- 10- 4.1电动机选择计算- 10- 4.1.1选择电动机的转速- 10- 4.1.2工作机的有效功率- 11- 4.1.3选择电动机型号- 11- 4.2传动比分配- 11- 4.3计算各轴转速- 12- 4.4蜗轮蜗杆设计- 12- 4.4.1选择蜗杆传动类型- 12- 4.4.2选择材料- 12- 4.4.3按齿面接触疲劳强度进行设计- 12- 4.4.4蜗杆与蜗轮的主要参数与几何尺寸- 14- 4.4.5校核齿根弯曲疲劳强度- 14- 4.4.6验算效率- 15- 4.4.7精度等级公差和表面粗糙度的确定- 16- 4.5滚珠丝杠设计- 17- 4.5.1选择滚珠丝杠型号及其工作条件- 17- 4.5.2降速比计算- 17- 4.5.3惯量计算- 17- 4.5.4电动机力矩计算- 17- 4.5.5刚度计算- 18- 4.5.6反向死区- 18- 4.5.7传动刚度变化引起的定位误差- 19- 4.6前后调节滚珠丝杠支承轴承验算- 19- 4.7垂直调节螺杆验算- 20- 4.7.1螺杆的强度计算- 20- 4.7.2螺杆稳定性计算- 20- 4.8垂直调节机构支承轴承验算- 21- 结论- 22- 致谢- 23- 参考文献- 24- 附录Ⅰ…………………………………………………………………………- 25-