商用车双中间轴变速器关键技术研究

发布时间：2018-03-25 22:41

本文选题：变速器　切入点：双中间轴　出处：《吉林大学》2012年硕士论文

【摘要】：双中间轴变速器是一种典型的重型变速器，与其他重型变速器相比，其最大的特点是具有两根完全相同的中间轴，这样在同等工况下，每根中间轴所分配的功率便为单中间轴变速器的一半，双中间轴变速器还具有很多其特有的技术，如二轴以及二轴齿轮的浮动设计、一系列的修正齿形设计、特有的同步器设计等等，这些技术使双中间轴变速器具有很多突出的优点，解决了普通单中间轴变速器无法解决的很多问题，具有其他变速器无法比拟的优越性。由于采用双中间轴设计，那么在变速器运转过程中必然同时会有两个中间轴主动齿轮与一个二轴被动齿轮啮合传动，为了抵消对齿误差以及齿轮制造误差对于二轴齿轮啮合的影响，二轴以及二轴上的齿轮必须采用浮动的方式。本文着重研究双中间轴变速器浮动问题，对于二轴以及二轴上齿轮的浮动方式进行全方位探讨，，通过对多种品牌产品的研究对目前双中间轴变速器二轴以及二轴齿轮的浮动方式提出相关的设计方案。一直以来二轴以及二轴齿轮浮动多采用间隙配合，但是间隙量的大小并没有给出明确的规定，大多数厂商都采用较大的间隙量以避免齿轮误差造成不能正确啮合对变速器的使用寿命造成影响，然而采用大间隙对于变速器的承载能力以及结构的紧凑性以及变速器的使用性能等都会有一定程度的影响，所以本文重点研究二轴齿轮浮动量与变速器装配过程中的对齿误差以及齿轮制造误差等因素的关系，通过采用相关理论分析，以及recurdyn多体动力学仿真，对误差与浮动量的关系提出理论计算公式以及对计算公式的仿真验证，分析仿真结果可得出二轴齿轮的浮动量大小以及浮动过程中特有的浮动方式，对理论计算起到了很好的补充作用。通过对浮动问题的研究，本文将提出一些降低浮动量的措施，这些措施都具有一定可实施性，通过对某品牌双中间轴变速器产品进行理论计算得出可以满足要求的最大间隙量，对目前已有的产品进行相关改进将进一步提高其使用性能，对实际生产具有一定的指导意义。
[Abstract]:The dual intermediate shaft transmission is a typical heavy duty transmission. Compared with other heavy duty transmissions, its biggest characteristic is that it has two identical intermediate shafts, so that under the same working conditions, Each intermediate shaft is allocated half as much power as a single intermediate shaft transmission, and the dual intermediate shaft transmission also has many of its unique technologies, such as the floating design of two shafts and two shaft gears, a series of modified gear designs, The special synchronizer design and so on, these technologies make double intermediate shaft transmission have many outstanding advantages, solve many problems that ordinary single intermediate shaft transmission can not solve, have the superiority that other transmission can't compare. Because of the design of double intermediate shaft, there must be two intermediate shaft active gear and a two axis passive gear meshing transmission in the course of transmission operation. In order to counteract the influence of tooth error and gear manufacturing error on the meshing of biaxial gears, the gears on two axes and on two shafts must be floated. In this paper, the floating problem of double intermediate shaft transmission is studied emphatically, and the floating mode of two shaft and two axle upper gear is discussed in all directions. Through the research of various brand products, this paper puts forward the relevant design scheme for the floating mode of two-shaft and two-axis gear of two-axis transmission with intermediate shaft. However, the size of clearance is not clearly defined, most manufacturers use larger clearance to avoid gear error caused by incorrect engagement on the transmission's service life, However, the use of large clearance will have a certain degree of influence on the bearing capacity of transmission, the compactness of structure and the performance of transmission. So this paper focuses on the relationship between the floating quantity of two-axis gear and the gear error and gear manufacturing error in the assembly process of transmission. By using the relevant theory analysis and recurdyn multi-body dynamics simulation, the paper studies the relationship between the two shaft gear floating quantity and the gear manufacturing error in the assembly process of the transmission. For the relationship between error and floating quantity, the theoretical calculation formula and the simulation verification of the calculation formula are put forward. By analyzing the simulation results, the size of the floating quantity of the two-axis gear and the special floating mode in the floating process can be obtained. It plays a very good supplementary role to the theoretical calculation. Through the study of the floating problem, this paper will put forward some measures to reduce the floating amount, which are all feasible. Through the theoretical calculation of a brand double intermediate shaft transmission product, the maximum clearance can be obtained. The improvement of the existing products will further improve its performance, and have a certain guiding significance to the actual production.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.41

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