齿轮

Considering influence of gear meshing excitation and the coupling effect of transmission system and structure system, a transient analysis of the gearbox system is performed, which is composed of shaft, gear, bearing and housing, and dynamic response curve of every node for gearbox system are obtained.

考虑齿轮啮合点的动态激励的影响以及传动系统和结构系统的耦合效应，对由齿轮－轴－轴承－箱体组成的变速箱系统进行了瞬态动力学有限元分析，得出了变速箱系统各节点的动态响应曲线，分析结果与变速箱磻统实际工作过程中出现的问题是一致的。

In this dissertation, first, based on theory of cutting tooth about the gleason spiral bevel gear, the equation of meshing in the process of cutting tooth, the surface equation of generating gear as well as the general tooth surface equation of the double circular arc spiral bevel gear, using GB12759-1991 type of double circular arc gear as a basic gear profile, a three-dimension solid model of double circular arc spiral bevel gear which has the good adaptability was carried out by used of Unigraphics software;Second, by researching of the algorithm about contact and collision as well as various contact types based upon Contacting Finite Element Method, a foundation was laid for selecting the contact type in analyzing contact stress of double circular arc spiral bevel gearing;Finally, through the connection port of PARASOLID between UG software and ANSYS/LS-DYNA software, the three-dimension solid model of double circular arc spiral bevel gearing obtained above in UG was imported into ANSYS/LS-DYNA, a finite element analyzing about contact stress of double circular arc spiral bevel gearing was carried out by applying new loading method.

本文首先基于格利森弧齿锥齿轮加工原理及切齿啮合过程中的啮合方程、产形轮齿面方程以及双圆弧弧齿锥齿轮的齿面方程，选用GB12759-1991型双圆弧齿轮基本齿廓为基准齿形，利用Unigraphics软件的建模功能，绘制了有较好适应性的双圆弧弧齿锥齿轮传动三维实体模型。其次，描述了应用有限单元法进行实体接触与碰撞问题算法的公式，研究了有限元分析中的各种接触类型以及双圆弧弧齿锥齿轮接触应力分析中所选择接触类型的依据。最后，通过UG软件和ANSYS/LS-DYNA之间的PARASOLID接口工具包，将UG软件中得到的啮合齿轮模型导入ANSYS/LS-DYNA有限元分析软件，给出一种新的加载方法，进行了双圆弧弧齿锥齿轮传动的接触应力的有限元分析。

First ,make up the main parts'structure and the key designing parameters; thus reference to the similar driving axle structure , decide the entire designing project ; fanially check the strength of the axle drive bevel pinion ,bevel gear wheel , the differentional planetary pinion, differential side gear , full-floating axle shaft and the banjo axle housing , and the life expection of carrier bearing .

本文首先确定主要部件的结构型式和主要设计参数；然后参考类似驱动桥的结构，确定出总体设计方案；最后对主，从动锥齿轮，差速器圆锥行星齿轮，半轴齿轮，全浮式半轴和整体式桥壳的强度进行校核以及对支承轴承进行了寿命校核。

The secondary gearbox is provided with a free-wheeling clutch, a pinion gear and bevel gears for transmitting the rotary movement of the engine to the counter rotating coaxial vertical shafts each carrying two rotor blades of airfoil cross section fixed by pitch bearing on teetering plates and teetering hinges to form horizontal rotors.

二级变速箱是提供一个自由转运离合器的齿轮和小齿轮锥齿轮传递旋转运动的引擎反旋转同轴竖井每个载有两名旋翼桨叶翼型截面固定音高关系摇摇欲坠板摇摇欲坠铰链，形成横向转子。

At present it has cycloidal pinwheel series; hard gear face series; hard gear face series used for plastics extruder only; bevel wheel series and so on more ten series about hundred varieties speed reducer and possesses complete technical force and advanced test method from research, development, design and manufacture of speed reducer and more one hundred filiales all over our country that realize internet service can meet the demands of customers greatly

目前已拥有摆线针轮系列；硬齿面齿轮系列；塑料挤出机专用硬齿面系列；斜齿轮系列等十几个系列上百个品种的减速机，具备非标减速机从研发、设计、制造的全套技术力量和先进的测试手段，再加上全国100多家分公司实行联网服务，极大地满足了客户需求。

A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes.

器'。''通过在不同大小的扣链齿轮间移动链条而转换自行车齿轮的装置

A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes.

例句1。脱轨器，转撤器通过在不同大小的扣链齿轮间移动链条而转换自行车齿轮的装置

A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes.

脱轨器，转撤器通过在不同大小的扣链齿轮间移动链条而转换自行车齿轮的装置

The main engine sets(main engine, high flexible coupling, gear box) is remote ontrolled by electrical-control flexible shaft device(type: KE-4).in the bridge there is main engine sets electrical-control flexible shaft maneuvering device, remote control the speed adjusting of port, starboard main engine, engage and disengage, reverse of port, starboard gear box through maneuvering handle.

本船对主机组（主机、高弹性联轴器、齿轮箱）采用电控软轴遥控装置型号：KE-4）。在驾驶室装有主机组电控软轴操纵装置，通过操纵装置手柄遥控左、右主机调速和左、右齿轮箱的离合和换向。

Integrated brake levers and gear shifters is another recent advancement that has allowed bikers to change the gear and pull the brakes, both at the same time, with very little movement of hands.

综合制动杠杆和齿轮变速是另一个最近的进步，已足以让骑车改变齿轮和拉刹车，不论是在同一时间，很少运动手。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。