30results about How to "Accurate and reliable design value" patented technology

The invention relates to a design method for a root thickness of a non-end-contact few-leaf oblique-line type auxiliary spring, and belongs to the technical field of suspension steel plate springs. The design method disclosed by the invention is capable of designing a thickness of a straight section of a root of the non-end-contact few-leaf oblique-line type variable-section auxiliary spring according to the structural parameters and elasticity modulus of each main spring of a non-end-contact few-leaf oblique-line type variable-section main-auxiliary spring, the length of the auxiliary spring, the thickness ratio of the oblique-line segments of the auxiliary spring, and a composite stiffness design requirement value KMAT of the main-auxiliary spring. Through examples and simulation verification, the design method for the root thickness of the non-end-contact few-leaf oblique-line type variable-section auxiliary spring, which is provided by the invention, is correct, an accurate and reliable design value of the root thickness of the auxiliary spring can be obtained, a reliable design method is provided for the root thickness of the auxiliary spring, and the design level, product quality and performance, and vehicle running smoothness of the non-end-contact few-leaf oblique-line type variable-section main-auxiliary spring are improved by virtue of the method; and meanwhile, design and test expenses can also be reduced, and the development speed of products can be accelerated.

The invention relates to a design method for gaps of main and auxiliary springs of a high-strength first-level gradual-change-rigidity leaf spring and belongs to the technical field of suspension steel plate springs. According to the design method, the gaps of the main and auxiliary springs of the high-strength first-level gradual-change-rigidity leaf spring can be designed according to design requirement values of a main spring structure parameter, the first-piece auxiliary spring length, the elastic modulus, the main spring intensifying rigidity, the main and auxiliary spring composite intensifying rigidity, a contact load, a rated load and the remaining tangent line arc height under the rated load. It can be seen that from a model machine loading test, the design method for the gaps of the main and auxiliary springs of the high-strength first-level gradual-change-rigidity leaf spring is right, accurate and reliable design values of the gaps of the main and auxiliary springs can be obtained, and a reliable technical basis is laid for design of the high-strength first-level gradual-change-rigidity leaf spring and CAD software development. By means of the method, the product design level, quality and performance and the vehicle running smoothness can be improved; and meanwhile, the product designing and experiment testing cost is reduced, and the product development speed is increased.

The invention relates to a design method for the outer diameter of a torsion tube of an internal offset non-coaxial cab stabilizer bar system, and belongs to the technical field of cab suspension. According to the radial stiffness of the rubber bushing and the load coefficient of the torsional rubber bushing, the present invention utilizes the relationship between the roll angle stiffness and linear stiffness of the stabilizer bar system and the structure of the stabilizer bar and the radial stiffness of the rubber bushing to establish a torsion tube Mathematical model of outer diameter design and analytical design method. Through the design example and simulation verification, it can be seen that the method can obtain accurate and reliable design value of the outer diameter of the torsion tube, which provides a reliable design method for the design of the cab suspension and the inner offset non-coaxial cab stabilizer bar system, and It has laid a reliable technical foundation for the development of CAD software. Using this method can not only improve the design level of the cab suspension and stabilizer bar system, reduce the cab roll and buoyancy movement, improve the ride comfort and safety of the vehicle, but also reduce design and test costs and speed up product development speed.

The invention relates to a design method for the length of a swing arm of an internal offset non-coaxial cab stabilizer bar system, and belongs to the technical field of cab suspension. According to the design requirements of the cab on the roll angle stiffness of the stabilizer bar system, the structural parameters and material characteristic parameters of the stabilizer bar system, the mathematical model and the Matlab program are designed through the length of the swing arm, and the inwardly offset non-coaxial cab is stable. The swing arm length of the rod system is solved and designed. Through design examples and simulation verification, it can be seen that this method can obtain accurate and reliable swing arm length design values ​​of the stabilizer bar system, provide a reliable design method for the design of the cab suspension and stabilizer bar system, and lay a solid foundation for the development of CAD software Reliable technical foundation. Using this method can not only improve the design level and quality of the cab suspension and stabilizer bar system, improve the ride comfort and safety of the vehicle, but also reduce design and test costs and speed up product development.

The invention relates to a design method for the wall thickness of an inner circular sleeve of a rubber bush of an inner offset cab stabilizer bar, and belongs to the technical field of cab suspension. According to the structural parameters and material characteristic parameters of the internally biased cab stabilizer bar system, the present invention can utilize the roll angle stiffness and the equivalent line stiffness of the stabilizer bar, the radial stiffness of the rubber bushing, the equivalent combined line stiffness and the inner circle The relationship between the wall thickness of the sleeve, establish the design mathematical model of the wall thickness of the inner circle sleeve, and use Matlab to solve the design. Through the example design and ANSYS simulation verification, it can be seen that the method can obtain accurate and reliable design value of the wall thickness of the inner circular sleeve of the rubber bushing of the internal offset cab stabilizer bar, and provides a reliable design method for the stabilizer bar system. Using this method can improve the design level and performance of the stabilizer bar system without increasing the cost, and improve the ride comfort and safety of the vehicle; at the same time, it can also reduce design and test costs and speed up product development.

The invention discloses a design method for free tangent line arc heights of end non-iso-structured small-blade variable-section plate springs, and belongs to the technical field of suspension small-blade variable-section plate springs. The method can design the free tangent line arc heights of each plate spring of the end non-iso-structured small-blade variable-section plate springs according tothe number of the plate springs, structural parameters of each plate spring, elastic modules, thicknesses of root and end gaskets, an initial tangent line arc height of the first plate spring after assembly clamping and design requested values of pre-clamping stress of each plate spring. Through prototype testing, the design method for the free tangent line arc heights of the end non-iso-structured small-blade variable-section plate springs is correct; and a reliable technical method is provided for design of the free tangent line arc heights of each plate spring. The method can guarantee theinitial tangent line arc height of the first plate spring and pre-clamping stress of each plate spring to meet design requirements, improves the product design level, reliability and service life andthe vehicle driving safety, meanwhile, reduces the design and testing costs, and accelerates the product development speed.

The invention relates to a design method for the blanking length of each main spring of a high-strength three-stage gradually changing stiffness leaf spring, and belongs to the technical field of vehicle suspension leaf springs. The present invention can design the initial tangent arc height of the main spring and the initial surface shape of the first main spring according to the structural parameters of each main spring and auxiliary spring, the middle diameter of the lifting lug, the elastic modulus, the rated load and the residual tangent arc height of the rated load. On the basis of the calculation, the blanking length of each main spring of the high-strength three-stage gradient stiffness leaf spring is designed through the micro-element surface and superposition calculation. It can be seen from the test results of the blanking process of the prototype that the design method of the blanking length of each main spring of the high-strength three-stage gradient stiffness leaf spring provided by the present invention is correct, and the accurate and reliable blanking length of each main spring can be obtained The design value has laid a reliable technical foundation for the modern CAD design of high-strength three-stage gradient stiffness leaf springs; at the same time, using this method can save materials, improve production efficiency, and have significant economic benefits.

The invention relates to a design method for the length of a torsion tube of an external offset non-coaxial cab stabilizer bar, and belongs to the technical field of cab suspension. The present invention takes the length of the torsion tube as a parameter, uses the load coefficient expression of the torsion rubber bushing, the equivalent combination line stiffness expression of the rubber bushing, and the equivalent line stiffness expression of the torsion tube to establish the torsion tube of the stabilizer bar Design the mathematical model of the length, and solve the design through the Matlab program. Through the design example and ANSYS simulation verification, it can be seen that the method can obtain accurate and reliable design value of the torsion tube length, which provides a reliable technical basis for the design of the stabilizer bar system and the development of CAD software. Using this method, the design level and quality of the stabilizer bar system can be improved only by adjusting the length of the torsion tube without increasing the product cost, and the design requirements of the roll angle stiffness of the stabilizer bar system can be met, and the ride comfort and performance of the vehicle can be improved. Safety; at the same time, design and test costs can also be reduced.

The invention relates to a design method for a gap between a primary spring and a secondary spring of a non-equal partial frequency first-level gradient stiffness plate spring, and belongs to the technical field of suspension steel plate springs. According to the design method, the gap between the primary spring and the secondary spring of the non-equal partial frequency first-level gradient stiffness plate spring can be designed according to design requirement values of structural parameters of each primary spring and the corresponding secondary spring, an elasticity modulus, primary spring intensifying stiffness, primary and secondary spring composite intensifying stiffness, contact load, rated load, and remaining tangent arc height under the rated load. Model machine loading flexibility experimental results show that the design method for the gap between the primary spring and the secondary spring provided by the invention is correct; a reliable technical foundation is laid for the design of the non-equal partial frequency first-level gradient stiffness plate spring and the development of CAD software. By utilizing the method, an accurate and reliable design value of the gap of the primary spring and the secondary spring can be obtained; the design level, the quality and the performance of a product can be improved; the driving smoothness and the safety of a vehicle can be improved; meanwhile, the design and experimental test cost of the product can be reduced; the development speed of the product is accelerated.

The invention relates to a design method for a root thickness of a non-end-contact few-leaf oblique-line type auxiliary spring, and belongs to the technical field of suspension steel plate springs. The design method disclosed by the invention is capable of designing a thickness of a straight section of a root of the non-end-contact few-leaf oblique-line type variable-section auxiliary spring according to the structural parameters and elasticity modulus of each main spring of a non-end-contact few-leaf oblique-line type variable-section main-auxiliary spring, the length of the auxiliary spring, the thickness ratio of the oblique-line segments of the auxiliary spring, and a composite stiffness design requirement value KMAT of the main-auxiliary spring. Through examples and simulation verification, the design method for the root thickness of the non-end-contact few-leaf oblique-line type variable-section auxiliary spring, which is provided by the invention, is correct, an accurate and reliable design value of the root thickness of the auxiliary spring can be obtained, a reliable design method is provided for the root thickness of the auxiliary spring, and the design level, product quality and performance, and vehicle running smoothness of the non-end-contact few-leaf oblique-line type variable-section main-auxiliary spring are improved by virtue of the method; and meanwhile, design and test expenses can also be reduced, and the development speed of products can be accelerated.

The invention relates to a design method for the length of a rubber sleeve of a coaxial cab stabilizer bar, and belongs to the technical field of cab suspension. According to the design requirements of the roll angle stiffness of the stabilizer bar system, the structure and material characteristic parameters of the coaxial stabilizer bar, and the inner circle radius ra, outer circle radius rb and material characteristic parameters of the rubber sleeve, the length Lx of the rubber sleeve can be adjusted. Perform analytical design. Through the example calculation and ANSYS simulation verification, it can be seen that the accurate and reliable design value of the length Lx of the rubber sleeve can be obtained by using this method, which lays a reliable technical foundation for the development of CAD software for the coaxial cab mount and stabilizer bar system. Using this method can not only improve the design level of the stabilizer bar system, but also meet the design requirements of the roll angle stiffness of the stabilizer bar system without increasing the cost, and improve the ride comfort of the vehicle only by adjusting the length Lx of the rubber sleeve. and riding comfort; at the same time, it can also reduce design and test costs.

The invention relates to a matching design method for pre-clamping stress of few pieces of root reinforced non-equal-thickness variable-section plate springs on the root portion and belongs to the technical field of few pieces of variable-section plate springs of a suspension frame. According to the matching design method, according to structural parameters of the plate springs, the elastic modulus, the rated load and the allowed stress of the first plate spring under the rated load, matching design is performed on the pre-clamping stress of the plate springs of the few pieces of root reinforced end portion non-equal-thickness parabola-shaped variable-section plate springs. It can be known from a prototype test that the matching design method for the pre-clamping stress of the few pieces of root reinforced non-equal-thickness variable-section plate springs is correct, a matching design value of the accurate and reliable pre-clamping stress can be obtained, and a reliable technical basis is laid for design of the arc height of free tangents of the plate springs. By means of the method, it can be guaranteed that the pre-clamping stress of the plate springs meets the design requirement, the design level and the reliability of products are improved, the service life of the products is prolonged, and the running safety of vehicles is improved; and meanwhile, the design and experiment cost of the products is reduced, and the product development speed is increased.

The invention relates to a simulation checking method for the maximum limit deflection of a first-grade plate spring with unequal bias frequency and gradually-changed stiffness and belongs to the technical field of suspension steel plate springs. The maximum limit deflection of the first-grade plate spring with the unequal bias frequency and the gradually-changed stiffness can be subjected to simulation checking on the basis of simulation calculation of a contact load and determination of a maximum allowable load according to the structure parameter, elastic modulus and maximum allowable stress of each of main springs and auxiliary springs as well as initial tangent camber height design values of the main springs and the auxiliary springs. Known by example simulation checking and model machine loading deflection tests, the simulation checking method for the maximum limit deflection of the first-grade plate spring with the unequal bias frequency and the gradually-changed stiffness, provided by the invention, is correct. By using the method, an accurate and reliable simulation checking value for the maximum limit deflection can be obtained, the design level and reliability of a product can be improved, the service life of the product can be prolonged, and the driving safety of a vehicle can be improved; and meanwhile, the designing and experiment testing expenses can also be reduced, and the development speed of the product can be increased.

The invention relates to a simulation test algorithm for the maximum limit deflection of a plate spring with non-equal bias frequency and one-stage gradient stiffness, and belongs to the technical field of suspension leaf springs. The present invention can be based on the contact load simulation calculation and maximum allowable load determination based on the structural parameters, elastic modulus, maximum allowable stress, and initial tangent arc height design value of each main spring and auxiliary spring. In the above, the simulation calculation of the maximum limit deflection of the first-order gradient stiffness leaf spring with unequal bias frequency is carried out. Through the example simulation calculation and the prototype load deflection test, it can be known that the simulation test algorithm of the maximum limit deflection of the non-equal bias frequency one-stage gradient stiffness leaf spring provided by the present invention is correct. Using this method can obtain accurate and reliable maximum limit deflection simulation calculation value, improve product design level, reliability and service life and vehicle driving safety; at the same time, it can also reduce design and test costs and speed up product development.

The invention relates to a design method for the diameter of a coaxial cab stabilizer bar, and belongs to the technical field of cab suspension. According to the design requirements of the cab on the roll angle stiffness of the stabilizer bar system, the structural parameters of the coaxial stabilizer bar system, the ratio of the inner and outer diameters of the torsion tube and the material characteristic parameters, the structural parameters and material characteristic parameters of the rubber bushing, Analytical design of the diameter of the coaxial cab stabilizer bar. Through the design example and simulation verification, it can be seen that the method can obtain the accurate and reliable design value of the diameter of the coaxial cab stabilizer bar, and provides a reliable design method for the design of the cab suspension and stabilizer bar system. A solid technical foundation has been laid. Using this method can not only improve the design level and quality of the coaxial cab suspension and stabilizer bar system, improve the ride comfort and safety of the vehicle, but also reduce design and test costs and speed up product development.

The invention relates to a design method for the feeding length of each main spring of a high-strength three-grade gradual-change-stiffness plate spring and belongs to the technical field of vehicle suspension steel plate springs. According to the design method, according to the structural parameters of each main spring and each auxiliary spring, the mean diameter of a lifting lug, the elasticity modulus, the rated load and the rated load remaining tangent arc height, based on initial tangent arc height design of each main spring and initial curved surface shape calculation of a first main spring, the feeding design of each main spring of the high-strength three-grade gradual-change-stiffness plate spring is designed through infinitesimal curved surface and superposition calculation. A sample machine feeding machining test result shows that the design method for the feeding length of each main spring of the high-strength three-grade gradual-change-stiffness plate spring is right, the accurate and reliable design value of the feeding length of each main spring can be obtained, and a reliable technical foundation is laid for modern CAD of the high-strength three-grade gradual-change-stiffness plate spring; and meanwhile, materials can be saved, the production efficiency is improved, and the design method has remarkable economic benefits.

The invention relates to a design method for the length of a coaxial cab stabilizer bar swing arm, and belongs to the technical field of cab suspension. The invention can analyze and design the length of the swing arm of the coaxial stabilizer bar according to the required value of the roll angle stiffness design of the cab stabilizer bar system, the structure and material characteristic parameters of the stabilizer bar, and the structure and material characteristic parameters of the rubber bushing. Through examples and ANSYS simulation verification, it can be known that this method can obtain accurate and reliable design value of the length of the coaxial stabilizer bar swing arm, which provides a reliable design method for the cab suspension and stabilizer bar system design, and lays a solid foundation for the development of CAD software. a solid technical foundation. Using this method can not only improve the design level and quality of the coaxial cab suspension and stabilizer bar system, but also improve the ride comfort and ride comfort of the vehicle; at the same time, it can also reduce design and test costs and speed up product development.

The invention relates to a design method for gradually-changing gaps of a double-stage auxiliary spring type non-equal offset-frequency plate spring with gradually-changing stiffness, and belongs to the technical field of suspension steel plate springs. According to the design method, the two-stage gradually-changing gaps delta MA1 and delta A12 of the double-stage auxiliary spring type non-equal offset-frequency plate spring with the gradually-changing stiffness can be designed according to structural parameters, the elastic modulus, the u-bolt clamping distance, the contact load each time, and the remaining tangential arc height required value under a rated load of each main spring and each auxiliary spring. It can be known, from a result of a prototype loading deflection test, that the design method of the gradually-changing gaps of the two-stage auxiliary spring type non-equal offset-frequency type plate spring with the gradually-changing stiffness is correct, and a reliable technological base is laid for design for the two-stage auxiliary spring type non-equal offset-frequency type plate spring with the gradually-changing stiffness and CAD software development. By adoption of the method, accurate and reliable design values of the two-stage gradually-changing gaps can be obtained, the design level of products is increased, and travelling smoothness and safety of vehicles are improved; and meanwhile, the design and test cost can be further lowered, and product development can be accelerated.

The invention relates to a design method for the wall thickness of a torsion tube of a coaxial cab stabilizer bar system, and belongs to the technical field of cab suspension. The present invention can carry out the torsion tube wall thickness of the coaxial stabilizer bar system according to the cab's design requirements for the roll angle stiffness of the stabilizer bar system, the structure and material characteristic parameters of the stabilizer bar system, and the structure and material characteristic parameters of the rubber bushing. Analyze the design. Through example calculation and simulation verification, it can be known that this method can obtain accurate and reliable design value of the torsion tube wall thickness of the coaxial cab stabilizer bar, which provides a reliable design method for the design of the cab suspension and stabilizer bar system, and is a good tool for CAD. Software development lays a solid technical foundation. Using this method can not only improve the design level and quality of the coaxial cab suspension and stabilizer bar system, improve the ride comfort and riding comfort of the vehicle; at the same time, it can also reduce design and test costs and speed up product development.

The invention relates to a design method for the inner diameter of a torsion tube of an internal offset non-coaxial cab stabilizer bar system, and belongs to the technical field of cab suspension. According to the design requirements of the roll angle stiffness, the structural parameters and material characteristic parameters of the inner offset non-coaxial cab stabilizer bar system, the radial stiffness of the rubber bushing, the equivalent combination line stiffness and the torsional rubber bushing The load factor of the bushing is used to analyze the inner diameter of the torsion tube of the stabilizer bar system. Through the design example and simulation verification, it can be seen that the method can obtain the accurate and reliable design value of the inner diameter of the torsion tube of the internal offset non-coaxial cab stabilizer bar system, which provides a reliable design method for the design of the stabilizer bar system, and can be used for CAD software The development has laid a solid technical foundation. Using this method can not only improve the design level of the cab suspension and stabilizer bar system, improve the ride comfort and safety of the vehicle, but also reduce design and test costs and speed up product development.

The invention relates to a design method for the outer radius of a rubber sleeve of a coaxial cab stabilizer bar, and belongs to the technical field of cab suspension. The present invention can be based on the design requirements of the cab suspension on the roll angle stiffness of the stabilizer bar system, the structure and material characteristic parameters of the coaxial stabilizer bar, and the inner circle radius ra, length Lx and material characteristic parameters of the rubber sleeve. The outer circle radius rb of the set is analyzed and designed. Through the example calculation and ANSYS simulation verification, it can be seen that the accurate and reliable design value of the outer circle radius rb of the coaxial cab stabilizer bar rubber sleeve can be obtained by using this method, which can not only improve the design of the coaxial cab suspension and stabilizer bar system level and quality, and without increasing the cost, only through the adjustment design of the outer circle radius rb of the rubber sleeve, the design requirements of the roll angle stiffness of the stabilizer bar system can be achieved, and the driving comfort and ride comfort of the vehicle can be improved; at the same time, Design and test costs can also be reduced.

The invention relates to a design method for the inner radius of a rubber sleeve of a coaxial cab stabilizer bar, and belongs to the technical field of cab suspension. The present invention can analyze and design the inner circle radius ra of the rubber sleeve according to the design requirements of the cab's roll angle stiffness, the structure and material characteristic parameters of the coaxial stabilizer bar, and the structure and material characteristic parameters of the rubber bushing. Through example calculation and ANSYS simulation verification, it can be seen that the design value of the inner circle radius ra of the rubber sleeve can be obtained accurately and reliably by using this method, which has established a reliable technical foundation for the development of CAD software for the coaxial cab mount and stabilizer bar system. Using this method can not only improve the design level of the coaxial cab stabilizer bar system, but also can meet the design requirements of the roll angle stiffness without increasing the cost, only by adjusting the design of the inner circle radius ra of the rubber sleeve , improve the ride comfort and ride comfort of the vehicle; at the same time, it can also reduce the design and test costs.

The invention relates to a design method for the length of a torsion tube of an internal offset non-coaxial cab stabilizer bar system, and belongs to the technical field of cab suspension. According to the design requirements of the roll angle stiffness of the stabilizer bar system, the structural parameters and material characteristic parameters of the stabilizer bar system, the mathematical model and the Matlab program are designed through the length of the torsion tube, and the non-coaxial cab stabilizer bar system is offset inwardly. The length of the torsion tube is solved for the design. Through the design example and simulation verification, it can be seen that the method can obtain accurate and reliable design value of the torsion tube length of the inner offset non-coaxial cab stabilizer bar system, which provides a reliable design for the design of the cab suspension and stabilizer bar system method, and laid a reliable technical foundation for the development of CAD software. Using this method can not only improve the design level and quality of the cab suspension and stabilizer bar system, improve the ride comfort and safety of the vehicle, but also reduce design and test costs and speed up product development.

The invention relates to a design method for the inner diameter of a torsion tube of an external offset non-coaxial cab stabilizer bar, and belongs to the technical field of cab suspension. According to the design requirement value of the cab roll angle stiffness, the structural parameters and material characteristic parameters of the stabilizer bar system, the outer deflection can be adjusted through the radial stiffness of the rubber bushing, the equivalent combination line stiffness and the load coefficient of the torsional rubber bushing. Analytical design of the inner diameter of the torsion tube of the non-coaxial cab stabilizer bar. Through the design example and ANSYS simulation verification, it can be seen that the method can obtain the accurate and reliable design value of the inner diameter of the torsion tube of the external offset non-coaxial cab stabilizer bar, which provides a reliable design method for the design of the stabilizer bar system, and can be used for CAD software The development has laid a solid technical foundation. The method can improve the design level, quality and performance of the cab suspension and the stabilizer bar system, improve the ride comfort and safety of the vehicle; at the same time, it can also reduce the design and test costs and speed up product development.

The invention relates to a design method for the internal offset of a torsion tube of an internal offset non-coaxial cab stabilizer bar, and belongs to the technical field of cab suspension. According to the design requirements of the cab on the roll angle stiffness of the stabilizer bar system, the structural parameters and material characteristic parameters of the stabilizer bar system, the design mathematics of the torsion tube inner offset of the inner offset non-coaxial cab stabilizer bar system can be established Model, and use the Matlab program to solve the design of the internal offset of the torsion tube. Through the design example and simulation verification, it can be known that the method can obtain accurate and reliable design value of torsion tube internal offset, provides a reliable design method for the design of the cab suspension and stabilizer bar system, and establishes a reliable foundation for the development of CAD software. technical foundation. Using this method can not only improve the design level and quality of the cab suspension and stabilizer bar system, improve the ride comfort and safety of the vehicle, but also reduce design and test costs and speed up product development.

The invention relates to a method for designing the working load of a non-end contact type parabolic leaf spring secondary spring, and belongs to the technical field of suspension leaf springs. According to the vehicle mass parameters, the structural parameters of each leaf spring, the elastic modulus, and the maximum allowable safety stress, the invention can design the starting load of the auxiliary spring of the non-end contact parabolic leaf spring. Through the prototype loading deformation test, it can be seen that the non-end contact parabolic leaf spring secondary spring working load design method provided by the present invention is correct, and the accurate and reliable secondary spring starting working load design value can be obtained, which is the non-terminal The design of the external contact type parabolic primary and secondary springs and the development of CAD software have laid a reliable technical foundation. The method can improve the product design level, quality and performance, and the ride comfort of the vehicle, and at the same time, reduce the cost of product design and test and test, and accelerate the speed of product development.

The invention relates to a method for designing limiting deflections of two-stage auxiliary spring type non-equal offset frequency type leaf springs with gradually changing stiffness, and belongs to the technical field of suspension leaf springs. According to the method, design can be carried out on the maximum limiting deflection of the two-stage auxiliary spring type non-equal offset frequency type leaf springs with gradually changing stiffness on the basis of calculation of clamping stiffness, gradually changing stiffness and maximum allowable load according to structure parameters, U-bolt clamping distances, loads of each contact and maximum allowable stresses of each main spring and each auxiliary spring. Prototype loading deflection experiments prove that the method for designing limiting deflections of two-stage auxiliary spring type non-equal offset frequency type leaf springs with gradually changing stiffness is correct, and a reliable technical method is provided for the design of limiting deflections of two-stage auxiliary spring type non-equal offset frequency type leaf springs with gradually changing stiffness. By utilizing the method, correct and reliable maximum limiting deflection design values can be obtained, the design level, reliability and vehicle running safety of products can be improved, the design and experiment expenses can be reduced, and the product development speed can be improved.