机械5

摘要 随着人们的生活质量不断提高，越来越多的人喜欢上了户外活动，在野外进行各种各样的运动。目前，很多公司、单位都组织大家参与这种活动，不仅可以锻炼大家的协同工作能力，同时还可以增添大家的生活乐趣，从而缓解大家在工作过程中的巨大压力。进而户外活动必不可少的需要户外用品，如餐盒、雨散帐篷、背包、衣服、登山工具、安全帽、手套、便携式衣架、保温杯、安全医药盒，小型便携式烧烤架、便携式折叠床等多种用品，在进行这些活时，折叠床是重要的一项。出去在郊外旅游时，走的累了需要休息的时猴，在不同的地方只能随地而坐，如果外出带着折叠床，就完全可以满足本人不同草地不同地点打开休息，它可以很轻松的打开，很快就能让人躺在上面床上面，舒服自然很快布满全身，微风吹过，让你感受大自然的气息，使你的身体得到全面放松，休息完，走时各部件都可以折叠起来，用包装袋包好，可以方便的放到任何一个角落里，是居家年轻人和长辈外出旅游必须携带的户外休闲产品。本文通过对折叠床的结构进行设计分析，使用三维软件SW建立出该结构的三维结构模型，首先在该软件的零件建模模块中建立该设备的关键零部件的三维图，然后使用该软件的零部件装配模块进行零部件的装配，得到整个折叠床的三维结构模型。为了对设计出的折叠床零部件结构强度进行校核，通过对该结构的受力情况进行分析，可以计算出该结构的受力情况，经过计算后得到折叠床的应力大小，并与不锈钢的材料应力进行比较，可知它的应力计算结果小于材料的许用应力，满足设计要求。 关键字：户外活动；折叠床；SW；许用应力 Abstract With the co
nti
nuous improveme
nt of people's quality of life, more a
nd more people like outdoor activities a
nd have avariety of sports i
n thewild. At prese
nt, ma
ny compa
nies a
nd u
nits orga
nize people to participate i
n this activity,which ca
n
not o
nly exercise everyo
ne's ability towork together, but also i
ncrease everyo
ne's life fu
n, so as to relieve the great pressure i
n the process ofwork. Furthermore, outdoor activities are
necessary for outdoor products, such as lu
nch boxes, umbrellas, te
nts, backpacks, clothes, mou
ntai
neeri
ng tools, helmets, gloves, portable clothes ha
ngers, thermos cups, safety medici
ne boxes, small portable barbecue racks, portable foldi
ng beds, etc. i
n these activities, the foldi
ng bed is a
n importa
nt item. Whe
n traveli
ng i
n the cou
ntryside,whe
nyou are tired a
nd
need to rest,you ca
n o
nly sit a
nywhere i
n differe
nt places. Ifyou go outwith a foldi
ng bed,you ca
n completely meet the
needs of ope
ni
ng a
nd resti
ng i
n differe
nt places o
n differe
nt grassla
nds. It ca
n be ope
ned easily a
nd people ca
n quickly lie o
n the upper bed. It is comfortable a
nd
natural, a
nd quickly covers thewhole body. The breeze blows, soyou ca
n feel the breath of
nature, so thatyour body ca
n be fully relaxed. After rest, all parts ca
n be folded up a
nd packed i
n bags. It ca
n be co
nve
nie
ntly placed i
n a
ny cor
ner. It is a
n outdoor leisure product thatyou
ng people a
nd elders must carrywhe
n they travel. I
n this paper, through the desig
n a
nd a
nalysis of the foldi
ng bed structure, the three-dime
nsio
nal structure model of the structure is established by usi
ng the three-dime
nsio
nal software SW. Firstly, the three-dime
nsio
nal drawi
ng of the key parts of the equipme
nt is established i
n the part modeli
ng module of the software, a
nd the
n the parts assembly module of the software is used to assemble the parts, a
nd the three-dime
nsio
nal structure model of thewhole foldi
ng bed is obtai
ned. I
n order to check the structural stre
ngth of the desig
ned foldi
ng bed parts, the stress of the structure ca
n be calculated by a
nalyzi
ng the stress situatio
n of the structure. After calculatio
n, the stress of the foldi
ng bed is obtai
ned, a
nd comparedwith the material stress of stai
nless steel, the stress calculatio
n result is less tha
n the allowable stress of the material,which meets the desig
n requireme
nts. Keywords: outdoor activities; foldi
ng bed; SW; allowable stress 目录 摘要I Abstract II 第一章选题背景及意义1 1.1选题背景1 1.2旅游折叠床的要求2 1.3现有产品调研2 1.3.1木制折叠床2 1.3.2钢丝折叠床3 1.3.3帆布折叠床3 1.4选题意义3 第二章折叠床结构方案设计4 2.1折叠床的工作原理4 2.2折叠床的总体结构6 第三章折叠床结构建模设计7 3.1产品尺寸的确定7 3.2折叠床床架的结构设计7 3.2.1折叠床床架模型7 3.2.2折叠床床架模型的建立过程8 3.2.3折叠床床架材料的选用10 3.3帆布的三维模型建立10 3.3.1帆布建模10 3.3.2帆布材料的选用11 3.4折叠床固定板模型建立12 3.4.1固定板建模13 3.4.2固定板材料的选用13 3.5折叠床连接板三维模型14 3.5.1连接板建模14 3.5.2连接板材料的选用........................................................................14 3.6折叠床的装配结构15 3.6.1折叠床总体装配模型16 第四章折叠床的受力分析18 4.1折叠床结构受力分析18 4.2折叠床的强度校核18 第五章总结 参考文献20 附录21 致谢22