【正文】 、結(jié)構(gòu)派生處理也可適用于相應(yīng)的機械裝置中作為驅(qū)動元件。 槽角α=40o177。支架包括扶手，儀表安裝輔助支架，扭腰盤連接處等，仰臥起坐架直接焊接于輔助連桿上。軸的結(jié)構(gòu)設(shè)計 軸的端部應(yīng)有45度倒角，以便安裝時對中，防止銳邊劃手。導(dǎo)電耐磨涂料層工藝較簡單，成本也較低。重復(fù)本段動作，直到跑帶位在中央位置。品質(zhì)要求：耐高溫。圖71支架減震圖72 底座減震小結(jié) 減震系統(tǒng)的設(shè)計，是電動跑步機的必需，減震系統(tǒng)的設(shè)計和考慮程度決定著所設(shè)計跑步機的檔次。 定期地檢查跑步機的各個螺釘、螺栓及螺帽，若有松動，請立即用工具鎖緊固定。應(yīng)提倡運動后休息30～60分鐘,適當(dāng)補充水份后,再以溫水沖淋,時間不要過長。s famous brandThe domestic electricity wins the race in the familyBefore 1996, electronic race apparatuses were all foreign products, the ones that entered the family were mostly mechanical race apparatuses that factories reformed system of by the bicycle factory made, patriots inspire awe even from distance to the imported electronic race apparatus of the price of several ten thousand and even more than ten ten thousand yuanAfter 1993, with the adjustment of the international industrial structure, enterprises shifted to our country, it is the happy and auspicious group pany of Shandong that utilizes the electrical machinery of this area, controls the advantage that the power produces at first, set up the special factory in 1994, through the working ability of the substantiating machine, bined domestic and international information, the happy and auspicious group all produced the electronic race apparatus of family expenses in order to make the part by oneself in 1995, and exhibit at the rich meeting of body of Nanchang of next year. Praised as gathering together the auspicious electronic race apparatus of the brand of the first nationality, the output reached 7,000 in that year, the sales volume reaches 5,000, has held the beginning of producing the domestic electronic race apparatus. Up to the production capacity of producing 100,000 per year by 2004 through the technological transformation not stopping , sell race apparatus 4 in the same year. 80,000, output value is 93,600,000 yuan, ine from sales is 72 million yuan, finished ISO9001 and European Union CE authentication at the same time , and is chosen as leading brand products in Shandong.Gather together the auspicious electronic race apparatus in order to expand the production scale , the resources of production of rational utilization, successively for some domestic enterprise39。s own image and interests, attack the rival, the external brand is sent fulltime or hire personnel, but the great majority are still the mercial networks utilizing the whole country to open, carry on omnidirectional monitoring to the market of our country. They carry on the investigation to classification of the goods , selling structure , product cost and consumer demand in the name of surveying and studying the market. A main one to investigate tort of all kinds of of the like product, including product design , appearance , inside structure , enterprise identification and various kinds of datum ,etc., then assemble the picture , material object and written historical materials in the policymaking level of the pany in time. On the market not normal of our country at present, all kinds of imitate , infringe the phenomenon and exist seriously, they once opportunity ripe, can hit out severely, never soft, as to this we must highly watch out for .Third, strengthen and is protected and put to the customs on record and applied working. The external brand tries hard to solve from flowing into outside the border and from exporting to the fake and forged products of the overseas market within the border through this kind of way , have domestic and international 1300 more than share is it is it involve thousands of of brand to apply to put on record 2003, through to protect jointly the whole country all pass, have notable effect.Because of the absolute predominance in price of sports goods of our country , make international trade rub constantly, embody in the antidumping mainly. Taking sports shoes as an example, our country is the manufacture big country of sports shoes in the world, because the domestic market is limited in capacity, the majority depended on exporting, 2003, exported about 3,200 million pairs. Nike shoes the whole world sell 60% China production, beautiful Tianjin strong shoes the whole world sell 90% make for China, world shoesmaking big country Spain have 14 sports shoes factory, sports shoes that China makes import more than 70 million pairs every year, price of each pair of ordinary sports shoes is more than 20 euro on this country39。建模過程占據(jù)了設(shè)計的大部分時間和經(jīng)歷，有些零件反反復(fù)復(fù)很多次，在無法完成的情況下，只好再去各大商場去調(diào)研，有了前面的工作，接下來的調(diào)研顯的收獲很大，使自己越來越專注于自己的設(shè)計，感覺每個數(shù)據(jù)，每個零件特征的繪制都流淌著自己的血。圖83 扭腰盤旋轉(zhuǎn)機構(gòu)圖84 扭腰盤折疊圖. 仰臥起坐架的設(shè)計根據(jù)美國醫(yī)療協(xié)會報導(dǎo),做仰臥起坐對人體新陳代謝 有絕對的幫助,其可增進(jìn)肺部運動量因而提升免疫力。跑步機的避震方式采用具彈性的橡膠墊將跑臺和底座框架墊隔開，使跑臺成懸吊狀態(tài)，進(jìn)而產(chǎn)生吸收震動的功能而達(dá)到避震的效果。不能過度鎖緊跑帶。完成后，插入跑步機的電源插頭與鑰匙，讓跑帶運轉(zhuǎn)幾分鐘。滾筒外部經(jīng)防銹處理?！獮槭馆S上零件易于安裝，軸端和各軸段的端部應(yīng)有導(dǎo)角——軸的形狀和尺寸力求簡單，以便于加工——軸上磨削的軸段有砂輪越程槽；需車制螺紋的軸段，應(yīng)有推刀槽；軸的材料軸常在交變應(yīng)力的作用下工作，其材料的要求是：強度高、剛度好、應(yīng)力集中的敏感度小，抗疲勞，加工性能好，有的軸表面要求也較高。小結(jié) 多楔帶適于傳遞功率較大而又要求結(jié)構(gòu)緊湊的場合，特別能適應(yīng)帶輪直徑小的傳動。確定帶輪直徑dede2（有效直徑）小帶輪有效直徑：由表890demin=20mm,由表891選de1=大帶輪有效直徑:小帶輪節(jié)圓直徑dp1=de1+2△e=+2*=36mm由表890，△e=大帶輪節(jié)圓直徑dp2=idp1=2*=67mmde2=dp22△e=672*=由表891，選de2=63mm計算帶速v v=πdp1n1 /（601000） m/s （32）注意：v↑ —→離心力、離心應(yīng)力↑—→FQ↓—→單位時間內(nèi)的應(yīng)力循環(huán)次數(shù)N↑v↓ —→P=Fv/100可知，P一定時，F(xiàn)↑—→張緊力↑ 一般v在5～25 m/s，最大30 m/s，在8～15 m/s較好V=∏*36*3400/60*1000=30m/s,合適初定中心距a0 中心距的大小對帶傳動的影響： a↑—→結(jié)構(gòu)大—→由于載荷變化引起帶的顫動—→掉帶 a↓—→帶的長度↓—→在一定速度下，單位時間內(nèi)帶的應(yīng)力變化次數(shù)N愈多，會加速帶的疲勞損壞；—→當(dāng)傳動比i較大時，包角↓ 對于V帶傳動，中心距a一般可取2（de1 ＋de2 ）≥a0≥（de1＋de2） （33）〈a0〈193初定 a0=150mm確定帶的有效長度Le Le0=2a0+∏/2（de1＋de2）+(de2de1)2/4a0=2*150++=由表852，選Le=450mm計算實際中心距a 中心距的變動范圍 考慮安裝調(diào)整和補償張緊力的需要（如膠帶伸長而松弛后的張緊），尚需給中心距留有一定的調(diào)整余量。由于被動地形成跑和走，從動作外形上看，幾乎與普通在地面上跑或走一樣，但從人體用力上看，在電動跑步機上跑、走比普通跑、走省去了一個蹬伸動作。它的動力來源是使用者通過自身臂部、膝部、踝關(guān)節(jié)的活動，推動跑步機而產(chǎn)生的運動。. . . .. .目 錄緒論 1 第1章 總體方案設(shè)計