539 352履帶拖拉機－單級最終傳動裝置設(shè)計（有cad原圖+中英文翻譯）,539,352履帶拖拉機－單級最終傳動裝置設(shè)計（有cad原圖+中英文翻譯）,履帶,拖拉機,最終傳動,裝置,設(shè)計,cad,原圖,中英文,翻譯 最終傳動裝置設(shè)計 摘要 履帶式拖拉機能夠正常行駛，拖拉機驅(qū)動輪需要足夠的驅(qū)動力。這就需要一套能夠增加傳動系的傳動比的專署機構(gòu)。它將進(jìn)一步降低驅(qū)動輪轉(zhuǎn)速，從而提高驅(qū)動輪的轉(zhuǎn)矩，這就是所謂的最終傳動。同時履帶式拖拉機的最終傳動還用來提高后橋的離地間隙。所以最終傳動要有適當(dāng)?shù)膫鲃颖?；保證后橋處有足夠的離地間隙；齒輪要具有較高的支承剛度；靠近驅(qū)動輪布置的最終傳動尤其要有可靠的密封。 外置式外嚙合圓柱齒輪最終傳動，使最終傳動成為一個獨立部件，便于拆裝和維修。這種結(jié)構(gòu)的主、從動齒輪在殼體內(nèi)的支持可以布置成簡支梁式，對提高支撐剛度有利。主動輪的嚙合條件降低了輪齒上的載荷，提高了承載能力，但結(jié)構(gòu)復(fù)雜。 最終傳動的傳動比較大，齒輪和軸受載嚴(yán)重，徑向尺寸受到輪輞尺寸和離地間隙的限制而不能太大。為了在結(jié)構(gòu)緊湊的情況下，保證齒輪有足夠的強度，外嚙合圓錐齒輪的最終傳動常常采用較大的齒寬和較少的齒數(shù)。為了保持齒輪的良好嚙合，必須保證兩齒輪軸中心線的平行度。 關(guān)鍵詞：主動齒輪，最終傳動，直齒，保護(hù)板 TGHE FINAL DRIVES DESIN ABSTRACT Track type tractor can be normal to drive, the tractor drives a demand to drive the dint enough . This need a set of canning increase to spread to move is of spread the exclusive organization that move compare. It will further lower to drive the rotation soon, from but the exaltation drives a the round turns to be apart from, this is so-called of end spread to move .At the same time track type tractor of end spread to move to still use to leave a cleft after increasing to the bridge. Outside install outside the place type matches the cylinder wheel gear the end spreading moves, making end spreading moved to become an independent parts, easy to dismantle to pack with maintain. This kind of structural lord, from move the wheel gear to can arrange in the hull support in a beam type, prop up to the exaltation just the degree is beneficial .Install of the active round matches the term lowers a ascends of is increases by dint, loading ability, but the construction sophisticates. It is end to spread to spread to move dynamically bigger, the wheel gear suffers to carry with stalk seriously, the path is left by a size with toward size the restrict of a ground of clefts but can't be too big. For the sake of under the situation that construction tightly packed, guarantee to wheel gear contain enough strength, the outside match the cone wheel gear end to spread to move to usually adopt the bigger breadth with the number of the less. KEY WORD：Drive gear wheel , The final drive, Spur gear，Guard 符 號 說 明 C　　 基本額定動載荷 Co　 基本額定靜載荷 Fr 徑向力　　 Fa 軸向力　　 Ft 圓周力 Ka 使用系數(shù) Kv　　 動載系數(shù) KFβ 齒向載荷分布系數(shù) KFα 齒間載荷分布系數(shù) KHβ　 齒向載荷分布系數(shù) KHα　 齒間載荷分布系數(shù) Lh　 軸承壽命 n　 轉(zhuǎn)速 Yε 抗彎強度重合度系數(shù) Yβ 抗彎強度螺旋角系數(shù) Yεβ 抗彎強度重合、螺旋角系數(shù) Zh 節(jié)點區(qū)域系數(shù) ZE 材料的彈性系數(shù) Zε 接觸強度重合度系數(shù) Zβ 接觸強度螺旋角系數(shù) Zεβ 重合、螺旋角系數(shù) Zn 接觸疲勞壽命系數(shù) Zx 接觸強度尺寸系數(shù) 目 錄 第一章 前言....................................... ....1 第二章 傳動系統(tǒng)概述....................................2 第三章 最終傳動概述....................................3 §3.1 最終傳動裝置的功用和要求.................... ..3 §3.2 最終傳動的分類、結(jié)構(gòu)分析及評價..................3 §3.2.1 外嚙合圓柱齒輪最終傳動.................... .3 §3.2.2 內(nèi)嚙合圓柱齒輪最終傳動......................4 §3.2.3 行星齒輪最終傳動............................4 §3.3 最終傳動的傳動方案及結(jié)構(gòu)簡圖...................4 第四章 總體設(shè)計.....................................6 §4.1機械式傳動系統(tǒng)總傳動比及各部件傳動比的確定......6 §4.1.1 傳動系的總傳動比............................6 §4.1.2 總傳動比在各部件間的分配....................7 第五章 最終傳動裝置設(shè)計................................8 §5.1 最終傳動裝置主要參數(shù)的選擇......................8 §5.2 最終傳動裝置強度校核..........................9 §5.2.1 齒輪強度校核............................... 9 §5.2.2 軸承壽命校核............................. .18 §5.2.3 軸強度校核.................................20 §5.2.4 螺栓強度校核...............................22 第六章 結(jié)論................................. .........26 參考文獻(xiàn)...............................................27 致謝..................................... .............28 IV