The invention relates to a design method for the limit deflections of end part contact type less-leaf parabola type main and auxiliary springs, and belongs to the technical field of suspension steel plate springs. According to the method, the limit deflections of the end part contact type less-leaf parabola type main and auxiliary springs can be designed according to the structural parameters, the elastic modulus, the maximum allowable safe stress and the free length of a limiting block of all leaf springs. A prototype loading transformation test shows that the design method for the limit deflections of the end part contact type less-leaf parabola type main and auxiliary springs is correct, an accurate and reliable limit deflection design value can be obtained, and a reliable technological basis is laid for the design of the end part contact type less-leaf parabola type main and auxiliary springs and the development of CAD software. By the use of the method, the design level, the quality and the performance of a product can be improved, and the vehicle running smoothness can be improved; meanwhile, the cost for product design and test is reduced, and the product development speed is increased.

Design method for limit deflections of end part contact type less-leaf parabola type main and auxiliary springs

The invention relates to a method for designing limiting deflection of few-leaf two-end-reinforced plate springs with ends of non-equal structures, and belongs to the technical field of suspension steel plate springs. The limiting deflection of the few-leaf two-end-reinforced plate springs with the ends of the non-equal structures can be designed by the aid of the method according to structural parameters, elastic modulus and the maximum allowable safety stress of various leaf springs and the free lengths of limiting stoppers. The method has the advantages that as known from sample machine loading deformation experiments and tests, the method for designing the limiting deflection of the few-leaf two-end-reinforced plate springs with the ends of the non-equal structures is correct, accurate and reliable limiting deflection design values can be obtained by the aid of the method, and a reliable technical foundation can be laid for designing the few-leaf two-end-reinforced plate springs with the ends of the non-equal structures and developing CAD (computer-aided design) software; the design level of products can be upgraded by the aid of the method, the quality and the performance of the products and the riding comfort of vehicles can be improved, the design, experiment and test costs of the products can be reduced, and the product development speeds can be increased.

Method for designing limiting deflection of few-leaf two-end-reinforced plate springs with ends of non-equal structures

The invention discloses a design method for length of a non-end-contact type less-leaf parabola variable-section auxiliary spring, and belongs to the technical field of suspension steel plate springs The design method comprises the following steps: establishing a design mathematical model for one half length LA of the auxiliary spring according to composite rigidity design requirement values of primary and auxiliary springs, structure parameters of each main spring leaf, elastic modulus, number of auxiliary spring leafs, thickness of a root straight section of the auxiliary spring, and a thickness ratio of a parabola section of the auxiliary spring; and designing the length of the non-end-contact type less-leaf parabola variable-section auxiliary spring According to a design example and ANSYS simulation verification, the method can obtain an accurate and reliable length design value of the non-end-contact type less-leaf parabola variable-section auxiliary spring, so that reliable technical basis is provided for designing non-end-contact type less-leaf parabola variable-section primary and auxiliary springs and developing a CAD software; and the method can be utilized for improving product design level, product quality and performance as well as vehicle travelling smoothness; and meanwhile, the design and test cost further can be reduced, and the product development speed is quickened

Design method for length of non-end-contact type less-leaf parabola variable-section auxiliary spring

The invention relates to a fiber-reinforced plastic (FRP) composite material main spring and auxiliary spring assembly. The FRP composite material main spring and auxiliary spring assembly comprises an FRP composite material main spring body, a front spring eye, a front outer bush, a front inner bush, a front shaft pipe, an upper cover plate, a lower bolster, a rear spring eye, a rear outer bush,a rear inner bush, a rear shaft pipe, an FRP composite material auxiliary spring body, a center pin shaft and an abrasion-resisting plate. According to the FRP composite material main spring and auxiliary spring assembly, the bearing capacity and the riding comfort of a vehicle in a no-load state or a full load state are considered and met. FRP composite material plate springs cannot be completelybroken, and the riding safety of the vehicle is guaranteed. The weight of a plate spring suspension is greatly reduced, and the fuel efficacy is improved. The riding comfort of the vehicle is improved. The structure of FRP composite material plate spring bodies and a metal connection piece is improved, the reliability of the longitudinally arranged FRP composite material plate springs is improved, the service life of the longitudinally arranged plate spring suspension is prolonged, it is unnecessary to replace the elastic components of the plate springs within the service life range of the whole vehicle, and the use cost of the plate springs is greatly reduced. The gap between the upper cover plate and a U-shaped bolt and the gap between the lower bolster and the U-shaped bolt are small,the stress swinging of a rear axle is effectively prevented, and the riding stability of the vehicle is improved.

Fiber-reinforced plastic (FRP) composite material main spring and auxiliary spring assembly

The invention relates to a designing method of the limiting deflection of few-leaf root-enhanced plate springs with different-structure ends, and belongs to the technical field of hanger bracket steel plate springs. According to the designing method, the limiting deflection of the few-leaf root-enhanced plate springs with different-structure ends can be designed according to the structural parameters, the elasticity modulus, the maximum allowable safety stress and the limiting-block free length of all the spring. A sample-machine loading deformation test shows that the designing method of the limiting deflection of the few-leaf root-enhanced plate springs with different-structure ends is correct, an accurate and reliable limiting-deflection design value can be obtained, and the reliable technology basis is laid for designing of the few-leaf root-enhanced plate springs with different-structure ends and CAD software development. By means of the designing method, the design level, the quality and the performance of the product and the vehicle driving smoothness can be improved; meanwhile, the product design cost and the testing cost are reduced, and the product development speed is increased.

Designing method of limiting deflection of few-leaf root-enhanced plate spring with different-structure ends

The invention relates to a design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps, and belongs to the technical field of suspension steel plate springs. The method comprises the steps that according to the structural size and elastic modulus of each parabolic type variable cross-section main spring, an end point deformation coefficient of each main spring and a deformation coefficient Gx-CD of the Nth main spring on the contact point of an auxiliary spring and the end straight section; then, according to the auxiliary spring acting load design requirement value and the end point deformation coefficient of each main spring, the endpoint force FN of the Nth main spring is obtained; then, according to the thickness h2 of the straight section at the root of the Nth main spring, the FN and the Gx-CD, the main and auxiliary gaps between the contact points of the auxiliary springs and the end straight sections of the main springs are designed. According to simulation verification, the accurate and reliable main and auxiliary spring gap design values can be obtained by means of the method, the auxiliary spring acting load design requirement is met, and the product design level and performance and the vehicle ride comfort are improved; meanwhile, the product development speed is increased, and the design and testing expenses are lowered.

Design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps

The invention relates to a computing method of deflection of a non-end-contact type few-leaf parabolic main and auxiliary spring structure and belongs to the technical field of suspension steel plate springs According to the computing method, the main and auxiliary spring deflection of a non-end-contact type few-leaf parabolic tapered leaf spring can be designed according to structural parameters and elasticity modulus of the main and auxiliary spring structure A model machine loading deformation experiment test indicates that the computing method of deflection of the non-end-contact type few-leaf parabolic main and auxiliary spring structure is correct, an accurate and reliable main and auxiliary spring deflection computation value can be obtained, and reliable technological base is established for camber height design of the non-end-contact type few-leaf parabolic main and auxiliary spring structure and development of CAD (computer aided design) software; with the adoption of the method, design level, quality and performance of a product and driving comfort of a vehicle can be improved, besides, cost of product design and experiment testing is reduced, and the product development is accelerated

Computing method of deflection of non-end-contact type few-leaf parabolic main and auxiliary spring structure

The invention relates to a design method for the arc height of an end-non-isomorphic few-leaf root-strengthening-type steel plate spring, belonging to the technical field of suspension steel plate springs According to the design method, the initial tangent arc height of the end-non-isomorphic few-leaf root-strengthening-type steel plate spring can be designed according to the structure parameters, the elastic modulus, the rated load and a residue tangent arc height design required value under the rated load of each leaf of spring According to a model machine loading deformation test, the design method for the arc height of the end-non-isomorphic few-leaf root-strengthening-type steel plate spring is correct; an accurate and reliable initial tangent arc height design value can be obtained; and a reliable technical basis is provided for design and CAD software development of the end-non-isomorphic few-leaf root-strengthening-type steel plate spring By utilizing the method, the product design level, quality and performance and automobile driving smoothness can be improved; meanwhile, product design and testing cost is lowered; and product development is accelerated

Wang Xiao

Papers

Design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps

Computing method of deflection of non-end-contact type few-leaf parabolic main and auxiliary spring structure

Design method for limit deflections of end part contact type less-leaf parabola type main and auxiliary springs

Design method for arc height of end-non-isomorphic few-leaf root-strengthening-type steel plate spring

Method for designing limiting deflection of few-leaf two-end-reinforced plate springs with ends of non-equal structures