Design method of initial tangent arc heights of main and subsidiary springs of high-intensity first-level gradually varied rigidity plate spring

Abstract

The invention relates to a design method of initial tangent arc heights of main and subsidiary springs of a high-intensity first-level gradually varied rigidity plate spring, and belongs to the technical field of bearing steel plate springs. By the adoption of the design method of the initial tangent arc heights of the main and subsidiary springs of the high-intensity first-level gradually varied rigidity plate spring, initial tangent arc heights of the main spring and the subsidiary spring of the high-intensity first-level gradually varied rigidity plate spring are designed according to the structural parameter of the main spring, the length and the elastic modulus of a first piece of the subsidiary spring, the intensified rigidity of the main spring, and the composite intensified rigidity, contact loads, rated loads and remaining tangent arc height design requirement values of the main and subsidiary springs. It can be known from a model machine loading test that, the provided design method of the initial tangent arc heights of the main and subsidiary springs of the high-intensity first-level gradually varied rigidity plate spring is correct, accurate and reliable initial tangent arc height design values of the main and subsidiary springs of the high-intensity first-level gradually varied rigidity plate spring can be obtained, and a reliable technological basis for the high-intensity first-level gradually varied rigidity plate spring design and the CAD software development are laid. By utilizing the method, the design level, the quality and the performance of a product and the vehicle driving smoothness can be improved; meanwhile, the design and test expense of the product is reduced, and the product development speed is accelerated.

Description

technical field [0001] 本发明涉及车辆悬架钢板弹簧,特别是高强度一级渐变刚度板簧主副簧初始切线弧高的设计方法。 Background technique [0002] 为了满足在不同载荷下的车辆行驶平顺性及悬架渐变偏频保持不变的设计要求,随着高强度钢板材料的出现,可采用高强度一级渐变刚度板簧,其中,高强度一级渐变刚度板簧的主簧挠度及夹紧刚度,影响悬架系统偏频及车辆行驶平顺性,且主簧挠度总不同载荷下的计算,制约着强度一级渐变刚度板簧的主副簧切线弧高设计。然而,由于主簧和副簧在渐变过程中的渐变复合夹紧刚度的不仅与高强度一级渐变刚度板簧的结构有关,而且还与接触载荷大小有关,因此,高强度一级渐变刚度板簧在不同载荷下主簧挠度的计算非常复杂,据所查资料可知,先前国内外一直未给出高强度一级渐变刚度板簧主副簧初始切线弧高的设计方法。随着车辆行驶速度及其对平顺性要求的不断提高,对高强度一级渐变刚度设计板簧提出了更高要求,因此,必须建立一种精确、可靠的高强度一级渐变刚度板簧主副簧初始切线弧高的设计方法,为高强度一级渐变刚度板簧设计奠定可靠的技术基础,满足车辆行业快速发展、车辆行驶平顺性及高强度一级渐变刚度板簧的设计要求,提高产品设计水平、质量和性能,满足车辆行驶平顺性的设计要求;同时,降低设计及试验费用,加快产品开发速度。 Contents of the invention [0003] 针对上述现有技术中存在的缺陷,本发明所要解决的技术问题是提供一种简便、可靠的高强度一级渐变刚度板簧主副簧初始切线弧高的设计方法,设计流程图,如 figure 1 shown. 板簧采用高强度钢板,宽度为b,弹性模量为E,各片板簧为以中心穿装孔对称的结构,其安装夹紧距的一半L 0 为骑马螺栓夹紧距的一半L 0 ;高强度一级渐变刚度板簧的一半对称结构如 figure 2 所示,由主簧1和副簧2构成,其中,主簧1的片数为n,各片主簧的厚度为h i ,一半作用长度为L it ,一半夹紧长度为L i = L it -L 0 / 2,i=1,2,…,n;副簧2的片数为m,各片副簧的厚度为h Aj ,一半作用长度为L Ajt ,一半夹紧长度为L Aj = L Ajt -L 0 / 2,j=1,2,…,m。主簧初始切线弧高为H gM0 ...

AI Technical Summary

Problems solved by technology

However, since the gradual compound clamping stiffness of the main spring and auxiliary spring in the gradual change process is not only related to the structure of the high-strength grade-one graded-stiffness leaf spring, but also related to the contact load, the high-strength grade-one graded-stiffness plate The calculation of the deflection of the main spring under different loads of the spring is very complicated. According to the research data, there has been no design method for the initial tangent arc height of the main and auxiliary springs of the high-strength one-level gradual stiffness leaf spring at home and abroad.

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