Design method for free tangent line arc heights of root curvilinear-style unequal thickness stacked plate spring

Abstract

The invention relates to a design method for free tangent line arc heights of a root curvilinear-style unequal thickness stacked plate spring, and belongs to the technical field of suspension steel plate springs. According to the design method, the free tangent line arc heights of all plate spring bodies of the root curvilinear-style unequal thickness stacked plate spring can be designed accordingto the number of the plate spring bodies, the structural parameters of all the plate spring bodies, the elasticity modulus, the u-bolt clamping distance, pre-clamping stresses of all the plate springbodies and the assembly clamping tangent line arc height required value of the first plate spring body. As can be known through prototype testing that the design method for the free tangent line archeights of the root curvilinear-style unequal thickness stacked plate spring is correct, and a reliable technical method is provided for designing the free tangent line arc heights of all the plate spring bodies. By adoption of the method, the effect that the assembly clamping tangent line arc height of the first plate spring body and the pre-clamping stresses of all the plate spring bodies meet the design requirements can be guaranteed, the design level of the product is increased, reliability is improved, service life is prolonged and vehicle travelling safety is improved. Meanwhile, the design and test expenses of the product are reduced and the development speed of the product is increased.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the free tangent arc height of a root curved non-equal thickness superimposed leaf spring. Background technique [0002] Multi-leaf superimposed leaf springs are widely used parts in vehicle suspension springs. Usually, in order to improve the production process, improve the production efficiency of leaf springs and meet the complex force requirements of the first leaf spring, each leaf spring is formed by a curved surface. And the thickness of the first leaf spring is greater than the thickness of the other leaf springs, that is, the root curved non-equal thickness stacked leaf springs. Through the different free tangent arc heights of each leaf spring, ensure the pre-clamping tangent arc height of the first leaf spring after being pre-clamped by the center mounting bolt, and the assembly of the leaf spring after the saddle bolt assembly and clamping The a...

AI Technical Summary

Problems solved by technology

However, according to the researched data, it is known that due to the influence of the center piercing bolt clamping and saddle bolt assembly clamping on the leaf spring arc height, and the free tangent arc height of each leaf spring and the center piercing bolt pre-clamped The relationship between the pre-clamping tangent arc height, the assembly clamping tangent arc height after saddle bolt assembly and clamping, and the calculation of the influence coefficient of saddle bolt arc height have not been given before. Accurate and reliable root curve type non-equal thickness stacked plate The design method of spring free tangent arc height cannot meet the requirements of rapid development of vehicles and modern CAD design of suspension leaf springs

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