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

Abstract

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.

Description

technical field

[0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for designing the arc height of a leaf spring of a few-piece root-reinforced type with non-isomorphic ends. Background technique

[0002] With the rapid development of energy saving, comfort, light weight and safety of automobiles, leaf springs with variable cross-sections have light weight, high material utilization, no friction or small friction between sheets, low vibration and noise, and long service life. Advantages, it is increasingly concerned by vehicle suspension experts, manufacturers and vehicle manufacturers, and has been widely used in vehicle suspension systems. Usually, in order to meet the design requirements of processing technology, stress intensity, stiffness and lug thickness, a small number of variable cross-section leaf springs are processed into parabolic, oblique, root reinforced, end reinforced, and both ends reinforced types. In addition, due...

Examples

Embodiment 1

[0028] Embodiment 1: The sheet number N=2 of a certain few-sheet root-reinforced variable-section leaf spring, wherein, half the length L of each leaf spring M =575mm, width b=60mm, thickness h of the straight section at the root 2M =11mm, the end thickness h of the oblique line segment 2Mp =10.20mm, half of the installation distance l 3 = 55mm, the length of the oblique line segment Δl = 30mm, the distance from the root of the oblique line segment to the end point of the spring l 2M =L M -l 3 =520mm, the distance from the root of the parabola to the end point of the spring l 2Mp =L M -l 3 -Δl=490mm, modulus of elasticity E=200GPa, thickness ratio of the oblique segment of each leaf spring γ M = h 2Mp / h 2M =0.93; Thickness h of the straight end section of the first piece of spring 1M1 =7mm, the thickness ratio of the parabola segment β 1 = h 1M1 / h 2Mp =0.69; the thickness h of the straight section at the end of the second leaf spring 1M2 =6mm, the thickness rat...

Embodiment 2

[0048] Embodiment 2: The sheet number N=2 of a certain few-sheet root-reinforced variable-section leaf spring, wherein, half the length L of each leaf spring M =600mm, width b=60mm, thickness h of the straight section at the root 2M = 12mm, the end thickness h of the oblique line segment 2Mp =11mm, half of the installation distance l 3 = 60mm, the length of the slanted line Δl = 30mm, the distance from the root of the slanted line to the end of the spring l 2M =L M -l 3 =540mm, the distance from the root of the parabola to the end point of the spring l 2Mp =L M -l 3 -Δl=510mm, modulus of elasticity E=200GPa, thickness ratio of the oblique segment of each leaf spring γ M = h 2Mp / h 2M =0.92; Thickness h of the straight end section of the first leaf spring 1M1 = 7mm, the thickness ratio of the parabola segment β 1 = h 1M1 / h 2Mp =0.64; the thickness h of the straight section at the end of the second leaf spring 1M2 =6mm, the thickness ratio of the parabola segment ...

technical field

[0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for designing the arc height of a leaf spring of a few-piece root-reinforced type with non-isomorphic ends. Background technique

[0002] With the rapid development of energy saving, comfort, light weight and safety of automobiles, leaf springs with variable cross-sections have light weight, high material utilization, no friction or small friction between sheets, low vibration and noise, and long service life. Advantages, it is increasingly concerned by vehicle suspension experts, manufacturers and vehicle manufacturers, and has been widely used in vehicle suspension systems. Usually, in order to meet the design requirements of processing technology, stress intensity, stiffness and lug thickness, a small number of variable cross-section leaf springs are processed into parabolic, oblique, root reinforced, end reinforced, and both ends reinforced types. In addition, due...

Examples

Embodiment 1

[0028] Embodiment 1: The sheet number N=2 of a certain few-sheet root-reinforced variable-section leaf spring, wherein, half the length L of each leaf spring M =575mm, width b=60mm, thickness h of the straight section at the root 2M =11mm, the end thickness h of the oblique line segment 2Mp =10.20mm, half of the installation distance l 3 = 55mm, the length of the oblique line segment Δl = 30mm, the distance from the root of the oblique line segment to the end point of the spring l 2M =L M -l 3 =520mm, the distance from the root of the parabola to the end point of the spring l 2Mp =L M -l 3 -Δl=490mm, modulus of elasticity E=200GPa, thickness ratio of the oblique segment of each leaf spring γ M = h 2Mp / h 2M =0.93; Thickness h of the straight end section of the first piece of spring 1M1 =7mm, the thickness ratio of the parabola segment β 1 = h 1M1 / h 2Mp =0.69; the thickness h of the straight section at the end of the second leaf spring 1M2 =6mm, the thickness rat...

Embodiment 2

[0048] Embodiment 2: The sheet number N=2 of a certain few-sheet root-reinforced variable-section leaf spring, wherein, half the length L of each leaf spring M =600mm, width b=60mm, thickness h of the straight section at the root 2M = 12mm, the end thickness h of the oblique line segment 2Mp =11mm, half of the installation distance l 3 = 60mm, the length of the slanted line Δl = 30mm, the distance from the root of the slanted line to the end of the spring l 2M =L M -l 3 =540mm, the distance from the root of the parabola to the end point of the spring l 2Mp =L M -l 3 -Δl=510mm, modulus of elasticity E=200GPa, thickness ratio of the oblique segment of each leaf spring γ M = h 2Mp / h 2M =0.92; Thickness h of the straight end section of the first leaf spring 1M1 = 7mm, the thickness ratio of the parabola segment β 1 = h 1M1 / h 2Mp =0.64; the thickness h of the straight section at the end of the second leaf spring 1M2 =6mm, the thickness ratio of the parabola segment ...

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