Automobile composite board spring

Abstract

The invention belongs to the field of automobile parts and particularly relates to an automobile composite board spring. The automobile composite board spring comprises a steel plate sprig piece located on the upper portion and at least one composite material spring piece located on the lower portion. The steel plate sprig piece and the composite material spring pieces are overlaid up and down and are connected into a whole through fasteners. According to the automobile composite board spring, the composite structure of the steel plate sprig piece and the composite material spring pieces is adopted, structure design is reasonable, the effect is significant, when the automobile composite board spring is installed on an automobile chassis and road jolts are transmitted to the spring through an axle, the high-strength composite material spring pieces absorb most vibration through elasticity of the composite material spring pieces, and good vibration reducing performance is achieved. The steel plate sprig piece mainly achieves the effects of connection with an automobile body and bearing of a small quantity of torsion and shear stress caused by steering and braking, and thus overall strength is ensured. Composite materials are light, so that the weight of the whole automobile board spring is reduced, and the effects of weight reducing, emission reducing and load increasing are very significant.

Description

technical field

[0001] The invention relates to an automobile composite leaf spring, which belongs to the field of automobile accessories. Background technique

[0002] Automobile leaf spring (an elastic element widely used in automobile suspension) is a safety component that connects the axle and the body through different types of shock absorbers. Attached directly to the body, it can also be mounted directly on the shock absorber. At present, the vast majority of automobile leaf springs are made of spring steel through a series of complex processes such as heat treatment. The weight of each group is about 50-500 kg, and the vehicle has at least four groups, with a total weight of about 200-2000 kg. Lightweight (reducing emissions and increasing load at the same time) is a major issue in the automobile industry. If the weight of the automobile leaf spring is too heavy, it will increase fuel consumption and reduce the loading capacity of the automobile. Therefore, the weig...

Examples

Embodiment 1

[0023] Such as figure 1 As shown, the automobile composite leaf spring includes a leaf spring 2 at the top and a composite spring 4 at the bottom. The leaf spring 2 and the composite spring 4 are stacked up and down and connected as a whole by fasteners. The leaf spring sheet 2 in the present embodiment is a variable cross-section, and its thickness is 8-18mm (thickness gradually decreases from the center to both ends); the composite material spring sheet 4 adopts glass fiber reinforced composite material, and its thickness is 20-65mm.

[0024] A central gasket 3 and two end wear-reducing blocks 5 are arranged between the leaf spring sheet 2 and the composite material spring sheet 4, wherein the central gasket 3 (made of steel material, such as low alloy steel, etc.) is located in the middle , both ends of wear-reducing blocks 5 (made of steel materials, such as low-alloy steel, etc.) are symmetrically arranged on the left and right; The spring sheet installation pad 6 adopts...

Embodiment 2

[0029] Such as figure 2 As shown, the leaf spring sheet 2 of the automobile composite leaf spring is an equal section, and its thickness is 12mm; the composite material spring sheet 4 adopts carbon fiber reinforced composite material, and its thickness is 20-65mm, and other structures are the same as in Embodiment 1.

[0030] Since the weight of carbon fiber composite material is 22% of that of steel, the weight of the whole set of automobile leaf springs can be further reduced by 50%-320%. It has been reduced from 29.6kg to the current 10.3kg; the fatigue strength has been increased from no more than 650MPa to more than 1000MPa; the fatigue life has been increased from 80,000 times to 200,000 times.

technical field

[0001] The invention relates to an automobile composite leaf spring, which belongs to the field of automobile accessories. Background technique

[0002] Automobile leaf spring (an elastic element widely used in automobile suspension) is a safety component that connects the axle and the body through different types of shock absorbers. Attached directly to the body, it can also be mounted directly on the shock absorber. At present, the vast majority of automobile leaf springs are made of spring steel through a series of complex processes such as heat treatment. The weight of each group is about 50-500 kg, and the vehicle has at least four groups, with a total weight of about 200-2000 kg. Lightweight (reducing emissions and increasing load at the same time) is a major issue in the automobile industry. If the weight of the automobile leaf spring is too heavy, it will increase fuel consumption and reduce the loading capacity of the automobile. Therefore, the weig...

Examples

Embodiment 1

[0023] Such as figure 1 As shown, the automobile composite leaf spring includes a leaf spring 2 at the top and a composite spring 4 at the bottom. The leaf spring 2 and the composite spring 4 are stacked up and down and connected as a whole by fasteners. The leaf spring sheet 2 in the present embodiment is a variable cross-section, and its thickness is 8-18mm (thickness gradually decreases from the center to both ends); the composite material spring sheet 4 adopts glass fiber reinforced composite material, and its thickness is 20-65mm.

[0024] A central gasket 3 and two end wear-reducing blocks 5 are arranged between the leaf spring sheet 2 and the composite material spring sheet 4, wherein the central gasket 3 (made of steel material, such as low alloy steel, etc.) is located in the middle , both ends of wear-reducing blocks 5 (made of steel materials, such as low-alloy steel, etc.) are symmetrically arranged on the left and right; The spring sheet installation pad 6 adopts...

Embodiment 2

[0029] Such as figure 2 As shown, the leaf spring sheet 2 of the automobile composite leaf spring is an equal section, and its thickness is 12mm; the composite material spring sheet 4 adopts carbon fiber reinforced composite material, and its thickness is 20-65mm, and other structures are the same as in Embodiment 1.

[0030] Since the weight of carbon fiber composite material is 22% of that of steel, the weight of the whole set of automobile leaf springs can be further reduced by 50%-320%. It has been reduced from 29.6kg to the current 10.3kg; the fatigue strength has been increased from no more than 650MPa to more than 1000MPa; the fatigue life has been increased from 80,000 times to 200,000 times.

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