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,在今后的工作中努力上進,立志成材。ll wear a mask, or just ignore the smog and go on jogging, she said. For those who are not so athletic, jogging also has its attractions. Wu Houbin started roughly two years ago, when he was severely obese. Within two months, his weight dropped from 82 kilograms to 64 kilograms. The success helped him recover health, and he has made friends. Jogging does not require speed, but stamina. If you want to stick to the game, you need to take it as a mission, a habit, and then eventually a hobby, Wu said. But persevering with jogging is not always easy. Jogging is beneficial for heartlung function, and the skeletal system, but doctors say improper technique damages the joints, especially the knees and ankles. Excessive jogging wears down the body, and harms one39。s ancient tradition. ... It is not about exercise but to discover the sense of oneness with yourself, the world and nature.Zarthoshtimanesh, who runs his own yoga center, Iyengar Yogabhyasa, in the Indian financial capital of Mumbai, says: Chinese students are very respectful. For me, all students are the same no matter what their race is and where they e from. The most important thing is to remove mental walls. Zarthoshtimanesh learned yoga from the late Yogacharya Iyengar and traveled with the master to different countries. Consulate General of India in southern China39。s smoggy days. If the smog is severe, I39。在此,再次向袁寧老師獻上我誠摯的謝意。 12 液壓傳動,章宏甲主編。從剛開始自己的茫然無措,到通過老師的指導(dǎo)漸入佳鏡,直到最后設(shè)計的完成,這中間的每一步都充滿了興奮與挑戰(zhàn),在設(shè)計的過 程中我不僅學(xué)到了技術(shù)上的新內(nèi)容 ,鞏固了自己的專業(yè)知識 ,還增強了與人合作的意識及能力,對于即將步入社會的我來說這是一次很好的鍛煉機會 ,同時也為我以后的工作打下了基礎(chǔ)。 故軸承型號選擇軸承 ;查表得:其內(nèi)徑為 20mm,外徑為 47 mm,寬度為 47 mm。 ( 3)軸承的選擇 由于該軸軸承主要承受軸向載荷 ,其極限轉(zhuǎn)速低 ,所以選用推力軸 承。 8 0 0 0 9 9 0 3 9 . 1 7 4 21 1 0C d N?? ??? ? ????? (2) 選擇型號 查表選 60206型軸承其 39。求出當(dāng)量動載荷 P 。 ????? 齒側(cè)凸緣(或排間槽)直徑 gd ot 2 ??? hzpd g ? 1801 5 . 8 7 5 co t 1 . 0 4 1 5 . 0 9 0 . 7 6 3 2 . 5 414 mm?? ? ? ? ? (3) 鏈輪的結(jié)構(gòu) 鏈輪的直徑較小 ,因此采用實心式(如圖 42所示 ) 圖 42 鏈輪結(jié)構(gòu)圖 (4) 鏈輪輪齒結(jié)構(gòu) 齒寬 11 bbf ? 內(nèi)鏈節(jié)寬 mmb ? 則 mmbb f 11 ???? 學(xué)士學(xué)位論文 19 倒角寬 pba )~(? P— 鏈節(jié)距 P = mm 則 mmba ? 倒角半徑 mmprx ?? 齒側(cè)凸緣 (或排間槽 ) 圓角半徑 mmpr x ???? 鏈輪齒總寬 : 1)1( ftfn bpnb ??? ?n 排數(shù) 取 2 ?tp 排距 取 ?1fb 取 則 1)1( ftfn bpnb ??? )12( ???? ? (三) 鏈輪軸的選擇 ,確定許用應(yīng)力 該軸傳遞的功率,對材料無特殊要求 ,故選用 45 鋼 ,并經(jīng)調(diào)質(zhì)處理。m a x ?????? 齒溝圓弧半徑 ir mmddr rri 6 0 6 0 33 39。 鏈傳動裝置:(如圖 41所示) 41 鏈傳動 (二)鏈傳動的設(shè)計 1. 鏈輪齒數(shù) Z 的確定 在實際工作過程中 ,此處鏈輪只作單個使用 ,起到一個傳遞運動力的作用 ,所以對于鏈輪輪齒強度、剛度要求較高 ,鏈輪齒數(shù)應(yīng)盡量取小 ,根據(jù)設(shè)計的起升裝置的起升要求 ,結(jié)合實際工作情況 ,初步確定齒數(shù) Z= 14。 ( 2) 結(jié)構(gòu)緊湊 比帶、鏈傳動所需的空間尺寸小。 (三)設(shè)計難點分析 為了使設(shè)計出來的 手動液壓堆高車 能實現(xiàn)預(yù)定的功能,分析設(shè)計任務(wù), 手動液壓堆高車 在設(shè)計的過程中有以下的難點需要解決: 手動液壓堆高車 能實現(xiàn)預(yù)定的載重量,對于液壓系統(tǒng)要如何設(shè)計。 5)自重輕、車身低、操作輕、視野開闊; 6)車架設(shè)計堅固,承載力強 (五 ) 手動液壓堆高車 設(shè)計參數(shù) 手動液壓堆高車性能 :在標(biāo)準(zhǔn)起升高度 和額定起重量為 500 ㎏。輕小型搬運車輛行業(yè)應(yīng)盡快抓住“物流熱”的機遇,努力提高產(chǎn)品技術(shù)含量,增加品種規(guī)格,為各行業(yè)的物流服務(wù)提供商務(wù)服務(wù)。 ............................................. 7 ............................................. 7 四、傳動裝置設(shè)計 ................................................... 8 (一)傳動裝置的選擇裝置 ....................................... 8 (二)鏈傳 動的設(shè)計 ............................................ 15 (三) 鏈輪軸的選擇 ............................................ 19 (四) 軸承選擇 ................................................ 18 五、 堆高車 外型結(jié)構(gòu)設(shè)計 ............................................ 20 (一)后輪的設(shè)計 .............................................. 24 .............................................. 24 .............................. 25 ........................................ 22 .......................................... 23 ................................................ 24 (二)機架的設(shè)計 .............................................. 25 學(xué)士學(xué)位論文 8 .......................................... 25 ........................ 25 (三)貨叉架的設(shè)計 ............................................ 28 (四) 內(nèi)六角圓柱頭螺釘設(shè)計 .................................... 30 六、 結(jié)論與展望 ................................................... 33 參 考 文 獻 .................................................. 34 致 謝 詞 ..................................................... 34 學(xué)士學(xué)位論文 9 手動液壓堆高車設(shè)計 一、緒論 (一)手動液壓堆高車的簡介 手動液壓堆高車是一種無污染,無動力的裝卸產(chǎn)品,該產(chǎn)品具有結(jié)構(gòu)緊湊,運輸靈活,操作簡單,回轉(zhuǎn)半徑小等特點。單門架結(jié)構(gòu)設(shè)計,轉(zhuǎn)彎半徑小,適用于機械制造,造紙,印刷,搬運,物流等行業(yè)使用。若配合托盤裝箱,集裝箱等及可實現(xiàn)單元化運輸,有效減少了零部件的碰撞,劃傷和堆放面積,減少搬運工作量,提高搬運效率。 關(guān)鍵詞 : 堆高車 液壓 鏈傳動 機架 外型組件 指導(dǎo)老師簽名: 學(xué)士學(xué)位論文 6 Manual Hydraulic Design of the Tool Truck Abstract: Manual hydraulic tall car is a kind of pollution free and dynamic loading and unloading product, the product haspact structure, transport flexible, simple operation, turning radiussmall etc. Characteristics. Apply to factory, workshops, warehouses, station, wharf handling and storage of goods in. For those with fire, explosion proof requirements of the site (such as printing workshop, oil depot, wharf, warehouse, etc.) more applicable. If packing, container with tray and ChanYuanHua transportation, can realize the effective reduced parts collision, scoring and piled up area, reduce handling work and enhance handling efficiency. ChanMen frame structure design, turning radius is small, be applicable to the machinery manufacturing, papermaking,printing, handling, logistics industries use. Keywords: haspact radiussmall Characteristics ChanYuanHua papermaking,printing, 學(xué)士學(xué)位論文 7 目 錄 一、緒論 ........................................................... 1 (一) 堆高車 的簡介 ............................................. 9 (二) 堆高車 的發(fā)展 ............................................. 9 (三) 堆高車 的優(yōu)勢及前景 ...................................... 10 (四) 堆高車 的優(yōu)點 ............................................ 10 (五) 堆高車 設(shè)計參數(shù) .......