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 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 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 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 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 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 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.