轻型商用车齿轮齿条转向器的台架试验研究

发布时间：2018-04-12 16:20

本文选题：轻型商用车 + 齿轮齿条转向器　；参考：《江苏大学》2016年硕士论文

【摘要】：轻型商用车是商用车领域的一个重要细分类别,它在结构特征和性能要求上更接近于乘用车,因此对转向系统有着特殊的外部条件和设计要求。轻型商用车的前轴载荷高于乘用车,有较高的转向阻力,但是设计上又追求乘用车的转向轻便和灵敏。轻型商用车的底盘结构不同于乘用车,驾驶员对转向系统传递的发动机振动和路面激励感知更加明显,但是设计上又经常对标乘用车的舒适驾驶感受。因此,轻型商用车对转向系统的性能要求更加的严苛。转向器是转向系统的核心部件,转向器的质量和性能的优劣直接决定着整个转向系统和整车转向性能的优劣。因此,在新车型的开发过程中,对转向器是否满足车辆性能要求的考核就显得尤其重要。如果将转向器的样件装配到试验样车上,再对整车进行性能和可靠性的评估,不但试验的周期较长,试验费用较高,而且在车辆的性能指标不合格时,很难准确的评估出转向器的问题点和改进方向。这时,我们就需要设计出一套转向器的台架试验方法和技术要求,将整车状态下的有关转向性能的目标和要求分解和量化到转向器的每一个单项的台架试验中进行考核和评价。本研究课题针对轻型商用车这一特殊的车辆分类,围绕车辆的性能和可靠性要求,对齿轮齿条式转向器的台架试验方法,以及限值目标或评价标准进行研究和探索。本课题的研究内容包括齿轮齿条转向器的性能试验、强度试验和耐久试验。先研究试验项目所要表征的产品特性与整车的技术目标的关联。再设计台架试验的具体操作方法,包括样件在试验台上的固定方式,试验设备的安装与调试,试验环境与条件的选取等试验前的准备工作,以及试验步骤和记录检测结果的方法。最后将转向器供应商在新车型开发过程中提交的样件按技术要求进行台架试验,并对试验结果进行合格与否的分析与判定。本研究课题的成果是设计和总结出了一套完善的转向器台架试验的技术要求和试验方法,不但可以应用于轻型商用车所使用的齿轮齿条式转向器的产品型式验收,还可以推广应用到具有相同结构和相似设计要求的转向器新品开发过程中,有较强的实用价值和指导意义。
[Abstract]:Light commercial vehicle is an important subdivision in the field of commercial vehicle, which is closer to passenger vehicle in terms of structural characteristics and performance requirements, so it has special external conditions and design requirements for steering system.The front axle load of the light commercial vehicle is higher than that of the passenger car, which has higher steering resistance, but the light and sensitive steering of the passenger vehicle is pursued in the design.The chassis structure of the light commercial vehicle is different from that of the passenger car, and the driver's perception of engine vibration and road excitation transmitted by the steering system is more obvious, but the comfortable driving experience of the standard passenger car is often found in the design.Therefore, the light commercial vehicle steering system performance requirements more stringent.Steering gear is the core component of steering system. The quality and performance of steering gear directly determine the steering performance of the whole steering system and the whole vehicle.Therefore, in the development of new vehicle, it is very important to check whether the steering gear meets the requirements of vehicle performance.If the steering gear sample is fitted to the test vehicle, and the performance and reliability of the whole vehicle are evaluated, not only the test period is longer, the test cost is higher, but also the vehicle performance index is not up to standard.It is difficult to accurately estimate the problem point and improvement direction of the steering gear.At this point, we need to design a set of steering gear bench test methods and technical requirements, and decompose and quantify the steering performance objectives and requirements in the whole vehicle state to be evaluated and evaluated in each individual bench test of the steering gear.Aiming at the special vehicle classification of light commercial vehicle, the paper studies and explores the test method of gear rack steering gear on the bench, as well as the limit target or evaluation standard, around the requirements of vehicle performance and reliability.The research contents include performance test, strength test and durability test of gear rack steering gear.First, study the relationship between the product characteristics of the test project and the technical objectives of the whole vehicle.The specific operation methods of redesigning the bench test, including the fixing mode of the sample on the test bench, the installation and commissioning of the test equipment, the selection of the test environment and conditions, etc., the preparation work before the test,And the test procedure and the method of recording the test result.Finally, the samples submitted by the steering gear supplier in the development process of the new vehicle are tested on the bench according to the technical requirements, and the test results are analyzed and judged to be qualified or not.The result of this research is to design and summarize a set of perfect technical requirements and test methods of steering gear bench test, which can not only be applied to the type acceptance of gear rack steering gear used in light commercial vehicles.It can also be popularized and applied to the development of new products of steering gear with the same structure and similar design requirements, which has strong practical value and guiding significance.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U467.3

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