CN116044945A - Sleeve type air spring air bag and manufacturing method thereof - Google Patents

Abstract

The invention discloses a sleeve type air spring air bag, which relates to the field of air springs and comprises an inner layer rubber layer, an inner layer fiber layer, an outer layer fiber layer and an outer layer rubber layer which are sequentially arranged from an inner layer to an outer layer of a sleeve, wherein the inner layer rubber layer is formed by overlapping two opposite edges of a rubber sheet around a circle, the inner layer fiber layer is formed by seamlessly splicing the two opposite edges of the fiber sheet around the periphery of the inner layer rubber layer, the outer layer fiber layer is formed by seamlessly splicing the two opposite edges of the fiber sheet around the periphery of the inner layer fiber layer, and the outer layer rubber layer is formed by overlapping the two opposite edges of the rubber sheet around the periphery of the outer layer fiber layer. The invention has the advantages that: the thickness of the product is kept uniform, and the axial force can be uniformly dispersed on the product, so that the service life of the air spring is prolonged.

Description

A sleeve type air spring air bag and its manufacturing method

technical field

The invention relates to the field of air springs, in particular to a sleeve-type air spring airbag and a manufacturing method thereof.

Background technique

Vehicles with air suspension can take into account ride comfort, comfort, handling stability and safety at the same time, which is one of the development trends of automobile suspension. The air spring is the core component of the air suspension. It is an elastic element that uses the reaction force of the compressed air inside the rubber airbag as the elastic restoring force. It has excellent working characteristics such as variable stiffness, adjustable height, and long life. In the ever-growing application of air springs, in the development trend of lightweight, intelligent, and multi-functional vehicles, higher requirements are put forward for air springs: sleeve-type air spring airbag thickness uniformity requirements, while ensuring the life of the airbag.

The patent document whose notification number is CN211166303U discloses a vehicle body height adjustment device for trailer axles, including an air spring, the air spring includes a first rubber layer, the outer side of the first rubber layer is connected with a carbon fiber film layer, and the carbon fiber film A second rubber layer is attached to the outer side of the layer. The fiber layer of the existing air spring airbag is overlapped when the product is formed, and the overlapped area is overlapped by two layers. After the product is vulcanized, the size and thickness of the overlapped part is relatively thick. Because the air spring reciprocates up and down when it works, the uneven size and thickness will cause the axial force of the air spring to be unstable, which will greatly affect the service life of the air spring.

Contents of the invention

The technical problem to be solved by the invention is how to make the thickness of the sleeve-type air spring air bag uniform.

The present invention solves the above-mentioned technical problems through the following technical means: a sleeve-type air spring airbag, comprising an inner rubber layer, an inner fiber layer, an outer fiber layer and an outer A rubber layer, the inner rubber layer is formed by lapping two opposite sides after a circle of rubber sheets, and the inner fiber layer is formed by lapping the outer circumference of the inner rubber layer with a fiber sheet. Seam splicing, the outer fiber layer is seamlessly spliced by fiber sheets around the outer circumference of the inner fiber layer and then two opposite sides are seamlessly spliced, and the outer rubber layer is made of rubber sheets surrounding the outer fiber layer The outer periphery of the layer is formed by lapping two opposite sides after a week.

Preferably, the unfolded shapes of the inner fiber layer and the outer fiber layer are both parallelograms, and the splicing sides are inclined to the length direction of the tube they enclose.

Preferably, the splicing edges of the inner fiber layer and the outer fiber layer are arranged symmetrically.

Preferably, the unfolded shapes of the inner rubber layer and the outer rubber layer are both rectangular, and the overlapping sides are parallel to the length direction of the cylinder they enclose.

Preferably, the width of the overlapping area of the inner rubber layer and the outer rubber layer is 2-8 mm.

A method for manufacturing a sleeve-type air spring airbag, which is used to manufacture the sleeve-type air spring airbag, comprising the following steps: arranging an inner rubber layer, an inner fiber layer, an outer fiber layer and an outer rubber layer in a row Unfold and spread on the workbench, the forming machine head rotates and moves downward from the starting edge of the inner rubber layer, when the forming machine head touches the inner rubber layer, the forming machine head turns outward while rotating The direction of the rubber layer moves so that the inner rubber layer, the inner fiber layer, the outer fiber layer and the outer rubber layer form a cylindrical shape sequentially from the inside to the outside.

Preferably, the size and distance of the inner rubber layer, the inner fiber layer, the outer fiber layer and the outer rubber layer are as follows:

A=O+d;

B=0÷4;

C=A+h ₁ ;

D=O×3-C+2B;

E=A+h ₁ +h ₂ ;

F=O×4-C-D-E+3B;

G=A+h ₁ +h ₂ +h ₃ ;

Among them, O is the perimeter of the molding machine head; A is the unfolded width of the inner rubber layer; B is the distance between the bottom edge of the inner rubber layer and the bottom edge of the inner fiber layer; C is the bottom edge width of the inner fiber layer; D is the distance between the bottom of the inner fiber layer and the bottom of the outer fiber layer; E is the width of the bottom of the outer fiber layer; F is the distance between the bottom of the outer fiber layer and the bottom of the outer rubber layer; G is the outer layer The unfolded width of the rubber layer; d is the width of the overlapping area of the inner rubber layer; h ₁ is the thickness of the inner rubber layer; h ₂ is the thickness of the inner fiber layer; h ₃ is the thickness of the outer fiber layer.

Preferably, the dimensional accuracy of B is ±1mm, the dimensional accuracy of C is ±0.1mm, the dimensional accuracy of D is ±1mm, the dimensional accuracy of E is ±0.1mm, the dimensional accuracy of F is ±1mm, and the dimensional accuracy of C is ±2mm.

The advantages of the present invention are: only the inner rubber layer and the outer rubber layer of the sleeve type air spring airbag of the present invention have overlapping parts, because these two parts are pure rubber layers, fluidity and ductility are good during vulcanization, and the overlapping parts are not It will be too thick, so it will not be affected; and the inner fiber layer and the outer fiber layer have no overlapping parts, which ensures the uniformity of thickness; because the thickness of the product remains uniform, the axial force received can be evenly distributed on the product, increasing the air The service life of the spring; the structural modification is small and the operability is strong.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a conventional sleeve-type air spring airbag.

Fig. 2 is a partially enlarged schematic diagram of area A of the existing sleeve-type air spring airbag.

Fig. 3 is a partially enlarged schematic view of area B of the existing sleeve-type air spring airbag.

Fig. 4 is a schematic cross-sectional view of a sleeve-type air spring airbag according to an embodiment of the present invention.

Fig. 5 is a partially enlarged schematic diagram of area C of the sleeve-type air spring airbag according to the embodiment of the present invention.

Fig. 6 is a partially enlarged schematic view of area D of the sleeve-type air spring airbag according to the embodiment of the present invention.

Fig. 7 is a schematic diagram of a manufacturing method of a sleeve-type air spring airbag according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in Figures 1 to 3, the inner rubber layer 10, the inner fiber layer 20, the outer fiber layer 30 and the outer rubber layer 40 of the existing sleeve-type air spring airbag are all formed by overlapping after a circle. , on the partially enlarged diagrams of Fig. 2 and Fig. 3, it can be clearly seen that the overlapping areas of the inner fiber layer 20 and the outer layer fiber layer 30 are two layers superimposed together, and the width of the overlapping part is 2-8mm. This leads to uneven thickness of the product after vulcanization, and the overlapping part is too thick, which cannot meet the ideal size requirements.

As shown in Figures 4 to 7, the embodiment of the present invention discloses a sleeve-type air spring airbag, which includes an inner rubber layer 11, an inner fiber layer 21, and an outer fiber layer arranged sequentially from the inner layer of the cylinder to the outer layer of the cylinder. 31 and the outer rubber layer 41, the inner rubber layer 11 is formed by lapping two opposite sides after a circle of rubber sheets, and the inner fiber layer 21 is formed by two opposite sides after the outer circumference of the inner rubber layer 11 is surrounded by fiber sheets The outer layer of fiber layer 31 is seamlessly spliced by two opposite sides after a week around the outer circumference of the inner layer of fiber layer 21 by a fiber sheet, and the outer layer of rubber layer 41 is formed by a rubber sheet around the outer circumference of the outer layer of fiber layer 31 A week later the two opposite sides are joined together.

The unfolded shapes of the inner rubber layer 11 and the outer rubber layer 41 are both rectangular, and the overlapping sides are parallel to the length direction of the tube they enclose, and the width of the overlapping area is 2-8 mm.

The unfolded shapes of the inner fiber layer 21 and the outer layer fiber layer 31 are parallelograms, and the splicing sides are inclined to the longitudinal direction of the tube they encircle, and the splicing sides of the inner layer fibrous layer 21 and the outer layer fiber layer 31 are arranged symmetrically.

The embodiment of the present invention also discloses a method for manufacturing a sleeve-type air spring airbag, which is used to manufacture the sleeve-type air spring airbag, comprising the following steps: the inner rubber layer 11, the inner fiber layer 21, and the outer fiber layer 31 and the outer rubber layer 41 are arranged in a row in turn and laid flat on the workbench. The molding head 5 moves downward while rotating clockwise from the starting edge of the inner rubber layer 11. When the molding head 5 touches the inner When laying the rubber layer 11, the molding machine head 5 becomes and moves toward the direction of the outer rubber layer 41 while rotating clockwise, so that the inner rubber layer 11, the inner fiber layer 21, the outer fiber layer 31 and the outer rubber layer 41 is surrounded into a cylindrical shape sequentially from the inside to the outside.

The size and the distance of inner layer rubber layer 11, inner layer fiber layer 21, outer layer fiber layer 31 and outer layer rubber layer 41 are as follows:

A=O+d;

B＝O÷4(±1mm);

C＝A+h ₁ (±0.1mm);

D＝O×3－C+2B(±1mm);

E＝A+h ₁ +h ₂ (±0.1mm);

F＝O×4－C－D－E+3B(±1mm);

G＝A+h ₁ +h ₂ +h ₃ (±2mm);

Wherein, O is the 5 perimeters of the molding head; A is the unfolded width of the inner rubber layer 11; B is the distance between the bottom edge of the inner rubber layer 11 and the bottom edge of the inner layer fiber layer 21; C is the width of the inner layer fiber layer 21 Bottom edge width; D is the distance between the bottom edge of the inner layer fiber layer 21 and the bottom edge of the outer layer fiber layer 31; E is the bottom edge width of the outer layer fiber layer 31; F is the bottom edge of the outer layer fiber layer 31 and the outer rubber layer 41 is the distance from the bottom edge; G is the unfolded width of the outer rubber layer 41; d is the width of the overlapping area of the inner rubber layer 11; h ₁ is the thickness of the inner rubber layer 11; h ₂ is the thickness of the inner fiber layer 21 Thickness; h ₃ is the thickness of the outer fiber layer 31.

The base angles H, I, J, and K of the inner layer rubber layer 11, the inner layer fiber layer 21, the outer layer fiber layer 31 and the outer layer rubber layer 41 are respectively 90°, 54°, 54°, 90°, and the inner layer The height L of the rubber layer 11, the height M of the inner fiber layer 21 and the outer layer fiber layer 31, and the height N of the outer rubber layer 41 are equal, and the dimensional accuracy is ±5 mm.

Working principle: When working, the molding head 5 rotates clockwise and then falls. When it touches the inner rubber layer 11, the molding head 5 turns clockwise and moves toward the outer rubber layer 41. The inner rubber The layer 11 circles around the cylindrical molding head 5, and the overlapping area overlaps by 2-8mm to complete the process; when forming the inner fiber layer 21, we strictly control the size of the inner fiber layer 21 for each model of product The width accuracy is ±0.1mm, the inner fiber layer 21 is covered on the inner rubber layer 11, and the two opposite sides are just seamlessly spliced after a circle around the molding head 5, with no gaps and no overlapping parts; similarly, The outer layer of fiber layer 31 is covered on the inner layer of fiber layer 21, and the two opposite sides are just seamlessly spliced after a circle on the molding head 5, without gaps or overlapping parts; finally, the outer layer of rubber layer 41 is covered on the outer layer of fiber layer 31, on the forming machine head 5 around a circle, the overlapping area overlaps by 2-8mm, and completes the working steps.

The sleeve-type air spring airbag of the present invention only has the overlapping parts of the inner layer rubber layer 11 and the outer layer rubber layer 41. Because these two parts are pure rubber layers, they have good fluidity and ductility during vulcanization, and the overlapping parts will not be too thick. Therefore, it does not affect; while the inner fiber layer 21 and the outer layer fiber layer 31 have no overlapping parts, which ensures the uniformity of thickness; because the thickness of the product remains uniform, the axial force received can be evenly distributed on the product, which increases the performance of the air spring. Service life, the bench fatigue life of the air spring can reach 3.2 million times after testing, far exceeding the national standard.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications are made to the technical solutions, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (8)

1. A sleeve-type air spring air bag is characterized in that: comprising an inner rubber layer, an inner fiber layer, an outer fiber layer and an outer rubber layer arranged successively from the tube inner layer to the tube outer layer, the inner layer The rubber layer is formed by lapping two opposite sides of the rubber sheet around the outer circumference of the inner rubber layer, and the inner fiber layer is formed by seamless splicing of the two opposite sides after the fiber sheet surrounds the outer circumference of the inner rubber layer. The first fiber layer is made of fiber sheets that surround the outer circumference of the inner fiber layer and then two opposite sides are seamlessly spliced, and the outer rubber layer is made of rubber sheets that surround the outer circumference of the outer fiber layer and then two opposite sides Edges are joined together. 2. The sleeve-type air spring airbag as claimed in claim 1, wherein: the expanded shape of the inner fiber layer and the outer layer fiber layer is a parallelogram, and the splicing side is inclined to the cylinder surrounded by it. the length direction. 3. The sleeve type air spring airbag according to claim 2, characterized in that: the splicing sides of the inner fiber layer and the outer fiber layer are arranged symmetrically. 4. The sleeve-type air spring airbag as claimed in claim 1, wherein the expanded shape of the inner rubber layer and the outer rubber layer is a rectangle, and the overlapping edges are parallel to the cylinder formed by them. the length direction. 5 . The sleeve-type air spring airbag according to claim 1 , wherein the width of the overlapping area of the inner rubber layer and the outer rubber layer is both 2-8 mm. 6 . 6. A method for making a sleeve-type air spring air bag, for making the sleeve-type air spring air bag according to any one of claims 1-5, comprising the following steps: the inner rubber layer, the inner fiber layer, the outer The first fiber layer and the outer rubber layer are arranged in a row and spread out on the workbench. The molding head moves downward while rotating from the starting edge of the inner rubber layer. When the molding head touches the inner rubber layer At this time, the forming machine head changes to move towards the direction of the outer rubber layer while rotating, so that the inner rubber layer, the inner fiber layer, the outer fiber layer and the outer rubber layer form a cylindrical shape from the inside to the outside. 7. the manufacture method of sleeve type air spring airbag as claimed in claim 6 is characterized in that: the size and the distance of inner layer rubber layer, inner layer fiber layer, outer layer fiber layer and outer layer rubber layer are as follows: A=O+d; B=0÷4; C=A+h ₁ ; D=O×3-C+2B; E=A+h ₁ +h ₂ ; F=O×4-C-D-E+3B; G=A+h ₁ +h ₂ +h ₃ ; Among them, O is the perimeter of the molding machine head; A is the unfolded width of the inner rubber layer; B is the distance between the bottom edge of the inner rubber layer and the bottom edge of the inner fiber layer; C is the bottom edge width of the inner fiber layer; D is the distance between the bottom of the inner fiber layer and the bottom of the outer fiber layer; E is the width of the bottom of the outer fiber layer; F is the distance between the bottom of the outer fiber layer and the bottom of the outer rubber layer; G is the outer layer The unfolded width of the rubber layer; d is the width of the overlapping area of the inner rubber layer; h ₁ is the thickness of the inner rubber layer; h ₂ is the thickness of the inner fiber layer; h ₃ is the thickness of the outer fiber layer. 8. The manufacturing method of the sleeve type air spring air bag as claimed in claim 7, characterized in that: the dimensional accuracy of B is ±1mm, the dimensional accuracy of C is ±0.1mm, the dimensional accuracy of D is ±1mm, and the size of E The accuracy is ±0.1mm, the dimensional accuracy of F is ±1mm, and the dimensional accuracy of C is ±2mm.

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