The feasibility analysis for the proposed reducer is completed , the equations of speed reduce ratio , the bearing torque of each planetary gear , and efficiency of the reducer are developed 完成了减速器的结构设计方案的可行性分析，并在理论上推导出了减速器的传动比计算公式，各个行星轮受力力矩计算公式和减速器的效率计算公式。
What ’ s more , it also figures out the rotary errors of the structure . based on the results obtained , we know whether its precision distribution meet request , and the way to decrease rotary error was discussed 利用abaqus软件,针对中心轮和行星轮的接触特点,建立了两轮的三维模型,利用interaction接触分析模块,选择四面体单元c3d4结构进行齿面接触分析。
By means of the optimization method - punishing function method and taking the sum of the planet gear radius and center distance as the target function , the parameters of drive are optimized . by using the optimization program , the initial serial studies of drive are completed , the best serial parameter value of the drive is given 采用外点罚函数优化方法，通过取行星轮半径和中心距之和作为优化目标函数，对滚锥齿超环面行星蜗杆传动进行了参数优化，运用此优化程序，初步完成了对该种传动的系列化研究，给出了传动系列的最佳参数取值。
With the trait of power split and movable axis as well as application of inner meshed gear , planetary gear transmission has many advantages compared with general fixed axis gear transmission system . however , these advantages can not be realized without the balance of the load between planet gears 行星齿轮传动具有功率分流和动轴线的运动特点，以及内啮合的合理运用，使其相对于普通定轴线齿轮传动在技术和经济上具有很多优点，但如果行星轮间载荷不均衡，则这种优点就难以实现。
The paper researches a new type mechanical transmission mechanism - the rolling cone - type toroidal drive . the meshing efficiency has been studied completely and systematically and the parameters of drive are optimized on the base of analysis about meshing . by taking advantage of computer technology the main parts of the drive - stator , planet gear and worm are modeled and emulated 在对其进行啮合分析的基础上，对该传动的啮合效率进行了深入研究，并对该传动进行了参数优化，进而利用计算机技术，对该传动的主要零件? ?行星轮、环面定子和环面蜗杆进行了三维建模仿真，演示了该传动的运动情况。
Translation modes are similarly independent of the rotational support stiffnesses . large contact ratio do not mean lower mesh force . if either the number of sun or ring gear is not multiple of planet gear , system will run effectively , with lower impaction of tooth mesh in and out 研究表明：扭转支撑刚度的变化影响系统的转动模态，径向支撑刚度(行星架的除外)的变化影响系统的位移模态；齿轮间重合度大并不等于轮齿间的受力情况好；行星轮与内齿圈齿数不为行星轮个数的整数被时，轮齿的啮入、啮出对系统的冲击小，系统的效率高。
Ltd . the aim of this research is to find out the causes of abnormal axial force that results in fracture of bolts that anchor the shaft of planet gear and rupture of gear by means of force and deformation analysis , thus propose improving project of zl50 wheel type loader to enhance design quality . prime study content in the paper is described in the following 本课题研究的目的是通过该变速箱的均载性能、各部件的受力、变形以及齿轮接触应力的分析，寻找出直齿行星轮机构产生异常轴向力，从而导致变速箱行星轴止动螺栓断裂及部分行星轮轮齿崩裂的原因，为柳工zl50装载机行星齿轮变速箱的改进提出方案，提高设计质量和设计水平。
