Unlock instant, AI-driven research and patent intelligence for your innovation.
A Design Method of Parabolic Leaf Spring
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of a leaf spring and a design method, which is applied to the field of automobile leaf spring suspension, can solve the problems of difficulty in determining the range of errors, calculation errors, and difficulty in establishing a model, so as to improve the design calculation accuracy, eliminate calculation errors, and output results conveniently. Effect
Active Publication Date: 2020-06-09
SINO TRUK JINAN POWER
View PDF5 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0002] In the existing design methods of parabolic leaf springs, the known technology is a simplified formula derived by the method of material mechanics for truck leaf springs. It is necessary to use correction coefficients to correct the calculation results, and the error is large, which is not suitable for the design and calculation of parabolic leaf springs. The process is cumbersome and not suitable for application; some design and calculations use the finite element method, and the established model is difficult to be consistent with the designed product, resulting in calculation errors
Therefore, the existing design and calculation methods have large errors, and it is not easy to determine the range of errors
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0035] 1. Design a two-piece parabolic leaf spring, load 38677N, half-leaf spring load 9669N, leaf spring width 90mm, half-piece effective length 900mm, half-piece straight section length 90mm, end thickness 15mm, half-piece parabolic cut-off position 710mm.
[0036] 2. The material of the leaf spring is 51CrMoV4, which is used in off-road conditions, and the stress of the leaf spring is determined to be 500MPa.
[0037] leaf spring thickness h x The change rule is:
[0038]
[0039] 3. The thickness expression of the actual structure of the leaf spring is:
[0040]
[0041] After the expression is determined, a series of discretized x can be obtained according to the set 50mm spacing, and then a series of leaf spring thickness h can be obtained x Discrete values, and finally output these values to obtain the leaf spring thickness h that can be rolled x value:
[0054] 1. Design a three-piece parabolic leaf spring with a load capacity of 28174N. The first and second pieces each load 9669N, the width of the leaf spring is 90mm, the effective length of the half piece is 900mm, the length of the straight section of the half piece is 90mm, the thickness of the end is 15mm, and the cut-off position of the parabola of the half piece is 710mm; the third piece loads 8836N, the width of the leaf spring is 90mm, and the half piece is effective The length is 900mm, the length of the half-piece straight section is 90mm, the end thickness is 22mm, and the cut-off position of the half-piece parabola is 710mm;
[0055] 2. The leaf spring material is 51CrMoV4, and the leaf spring stress is determined to be 615MPa.
[0056] 3. The thickness expression of the actual structure of the leaf spring is:
[0057]
[0058] After the expression is determined, a series of discretized x can be obtained according to the set 50mm spacing, and then a series of ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention discloses a parabolic steel plate spring design method. The end and root portions of a parabolic steel plate spring are cross sections having the same thickness, the cross sections at the middle positions of the end and root portions of the parabolic steel plate spring change in thickness according to a parabolic law; according to the equal-stress requirement of the parabolic steel plate spring, the thicknesses, at all positions, of the plat spring at a parabola are determined according to an equal-stress principle, the thicknesses can be output according to different step lengths, then a plate spring shape is calculated under the equal-stress condition, the rigidity of the plate spring is calculated, and finally whether the rigidity of the plate spring meets the design requirement or not according to the offset frequency requirement. The convenient and accurate calculating method is provided for design of few parabolic steel plate springs and is easy to operate, quick to calculate and high in calculation accuracy, and output results facilitate guidance on production and product inspection.
Description
technical field [0001] The invention relates to a design method of a parabolic leaf spring, which belongs to the technical field of automobile leaf spring suspension. Background technique [0002] In the existing design methods of parabolic leaf springs, the known technology is a simplified formula derived by the method of material mechanics for truck leaf springs. It is necessary to use correction coefficients to correct the calculation results, and the error is large, which is not suitable for the design and calculation of parabolic leaf springs. The process is cumbersome and not suitable for application; some design calculations are made using the finite element method, and the established model is difficult to be consistent with the designed product, resulting in calculation errors. Therefore, the existing design and calculation methods have large errors, and it is not easy to determine the range of errors. Contents of the invention [0003] The technical problem to b...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More