Air spring production method and air spring

Abstract

The application discloses an air spring production method and an air spring, and relates to the field of air springs.The method comprises the following steps: step one, vulcanizing and fixedly connecting a skin bag, an upper pressing ring, a lower pressing ring and a guide sleeve into an integrated structure, the upper pressing ring is fixedly connected to the outer circle of the upper end of the skin bag, the lower pressing ring is fixedly connected to the outer circle of the lower end of the skin bag, and the guide sleeve is arranged outside the skin bag and fixedly connected to the middle section of the skin bag; step two, respectively arranging an upper air chamber and a piston of the air spring into the upper and lower ends of the skin bag, pressing the upper pressing ring and the lower pressing ring by external force, deforming the upper pressing ring and the lower pressing ring, and tightly fixing the skin bag on the upper air chamber and the piston.The application has the advantages that the number of parts to be assembled on site is reduced, the positioning difficulty is reduced, the positioning precision is improved, the assembly quality of the air spring assembly is greatly improved, and the production capacity is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air spring, in particular to an air spring production method and air spring. BACKGROUND

[0002] In the air spring shock absorber assembly structure, it can be divided into two parts: air spring assembly and shock absorber assembly. The air spring assembly is composed of upper air chamber, rubber bag and piston. The connection between them is that the rubber bag is pressed tightly on the upper air chamber and the piston by two compression rings. The patent document with the publication number CN208885848U discloses a double-constrained new type of suspension air spring. The upper iron piece, the first compression ring and the rubber air bag are sealed by pressure buckling. The rubber air bag, the piston and the second compression ring are buckled and sealed. The existing air spring production method is to press on the compression ring by external force, and the rubber bag is fixed on the upper air chamber and the piston by the deformation of the compression ring. During the processing, the positioning of the three parts of the compression ring part, the rubber bag part and the upper air chamber part, and the positioning of the three parts of the compression ring part, the rubber bag part and the piston part are required. The positioning is difficult and the positioning accuracy is difficult to guarantee. SUMMARY

[0003] The technical problem to be solved by the present application is how to reduce the positioning difficulty of air spring production and improve the positioning accuracy.

[0004] The present application solves the above technical problems by the following technical means: an air spring production method, comprising the following steps:

[0005] Step one, the rubber bag, the upper compression ring, the lower compression ring and the guide sleeve of the air spring are fixedly connected into an integrated structure. The upper compression ring is fixedly connected to the outer circle of the upper end of the rubber bag. The lower compression ring is fixedly connected to the outer circle of the lower end of the rubber bag. The guide sleeve is arranged outside the rubber bag and fixedly connected to the middle section of the rubber bag.

[0006] Step two, the upper air chamber and the piston of the air spring are respectively arranged in the upper and lower ends of the rubber bag. External force is pressed on the upper compression ring and the lower compression ring. The rubber bag is fixedly arranged on the upper air chamber and the piston by the deformation of the upper compression ring and the lower compression ring.

[0007] Since the rubber bag, the upper compression ring, the lower compression ring and the guide sleeve are fixedly connected into an integrated structure, the internal support ring is cancelled. Therefore, during on-site assembly, only the two ends of the rubber bag need to be assembled and pressed tightly with the corresponding upper air chamber and piston. The number of on-site assembly parts is reduced, the positioning difficulty is reduced, the positioning accuracy is improved, the assembly quality of the air spring assembly is greatly improved, and the production capacity is greatly improved.

[0008] Preferably, step one specifically comprises the following steps:

[0009] 1.1, forming a straight cylindrical rubber bag;

[0010] 1.2, send the skin bag into the mold vulcanization, to achieve the semi-vulcanization state;

[0011] 1.3, the semi-vulcanized skin bag is respectively expanded and shaped at the positions corresponding to the upper and lower pressure rings and the guide sleeve, until the outer surface of the skin bag is respectively attached to the inner surface of the upper and lower pressure rings and the guide sleeve and is bonded together under the fluidity of the rubber;

[0012] 1.4, the skin bag with the upper and lower pressure rings and the guide sleeve is sent into the mold for secondary vulcanization, so that it is completely shaped, and the skin bag, the upper and lower pressure rings and the guide sleeve are fixed into an integrated structure.

[0013] Preferably, in step 1.3, an adhesive is applied to the inner surfaces of the upper and lower pressure rings and the guide sleeve.

[0014] Preferably, in step 1.3, the expansion method is a mechanical air pressure expansion type.

[0015] Preferably, in step 1.3, the expansion method is a mechanical expansion type.

[0016] Preferably, the lower end, the middle section and the upper end of the skin bag are respectively expanded by using corresponding shape expansion blocks.

[0017] Preferably, the lower end, the middle section and the upper end of the skin bag are respectively expanded by using an expansion tooling, and the expansion tooling comprises an intermediate rod, a shaping plate, a roller and a sliding block; a plurality of shaping plates are uniformly distributed around the intermediate rod, the upper end of each shaping plate is rotatably connected to the intermediate rod, and the lower end of each shaping plate is provided with a roller; the cross section of the sliding block gradually increases from top to bottom, the intermediate rod passes through the center of the sliding block and is in sliding cooperation with the sliding block, and the rollers of each shaping plate are in rolling cooperation with the outer side surface of the sliding block.

[0018] An air spring comprises a skin bag, an upper air chamber, a piston, an upper pressure ring, a lower pressure ring and a guide sleeve, the skin bag, the upper pressure ring, the lower pressure ring and the guide sleeve are fixedly connected into an integrated structure, the upper pressure ring is fixedly connected to the outer circle of the upper end of the skin bag, the lower pressure ring is fixedly connected to the outer circle of the lower end of the skin bag, and the guide sleeve is arranged outside the skin bag and is fixedly connected to the middle section of the skin bag.

[0019] The advantages of the present application are:

[0020] 1. The number of parts to be assembled on site is reduced, the positioning difficulty is reduced, the positioning accuracy is improved, the assembly quality of the air spring assembly is greatly improved, and the production capacity is also greatly improved.

[0021] 2. The skin bag is expanded after forming, and can be formed into a straight cylinder during forming, so that the forming process is simple and the precision is high.

[0022] 3. The expansion tooling has an ingenious structure and is easy to use, and can expand the bladder quickly and easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an existing air spring assembly.

[0024] Figure 2 Schematic diagram of the existing fixing method of the bladder and the guide sleeve.

[0025] Figure 3 Schematic diagram of the fixing method of the bladder and the upper pressure ring in embodiment 1 of the present invention.

[0026] Figure 4 Schematic diagram of the fixing method of the bladder and the lower pressure ring in embodiment 1 of the present invention.

[0027] Figure 5 Schematic diagram of the fixing method of the bladder and the guide sleeve according to the first embodiment of the present invention.

[0028] Figure 6 Schematic diagram of the process of expanding the bladder of the expansion tool in Example 3 of the present invention.

[0029] Figure 7 Schematic diagram of the process of expanding the bladder of the expansion tool according to the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0030] To make the objectives, 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 only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] like Figure 1 、 Figure 2 As shown, the existing air spring assembly includes a bladder 1, an upper air chamber 2, a piston 3, two upper and lower pressure rings 4 (only the upper one is shown in the figure), a support ring 5, and a guide sleeve 6.

[0032] The existing air spring production method is to first install the upper air chamber 2 and the piston 3 into the two ends of the conical bladder 1 respectively, and then, after the bladder 1, the upper air chamber 2 and the pressure ring 4 are positioned relative to each other, an external force is applied to the pressure ring 4. Through the deformation of the pressure ring 4, the upper part of the bladder 1 is pressed and fixed on the upper air chamber 2, and the bladder 1, the piston 3 and another pressure ring are installed in the same way; the bladder 1 and the guide sleeve 6 are fixed in a way that a support ring 5 is provided inside the bladder 1 to stretch the middle section of the bladder 1, and the 6a part of the guide sleeve 6 is buckled with an external force to deform it inward, and a pressing force is applied to the bladder 1 to fix them together.

[0033] The prior method needs to position three parts of the ring 4, the bladder 1 and the upper air chamber 2, three parts of another ring, the bladder 1 and the piston 3, and three parts of the guide sleeve 6, the bladder 1 and the piston 5, which is difficult to position and hard to guarantee the positioning accuracy. Moreover, the prior bladder 1 must be conical, and the upper end opening must be larger than the lower end opening to form the overturning working area, which is complex in process and low in accuracy.

[0034] Embodiment one

[0035] The embodiment discloses an air spring production method, which comprises the following steps:

[0036] Step one, vulcanization and fixed connection of the bladder 1, the upper ring 41, the lower ring 42 and the guide sleeve 6 of the air spring into an integrated structure, the upper ring 41 is fixedly connected to the outer circle of the upper end of the bladder 1, the lower ring 42 is fixedly connected to the outer circle of the lower end of the bladder 1, and the guide sleeve 6 is arranged outside the bladder 1 and fixedly connected to the middle section of the bladder 1;

[0037] As shown in the figure, step one specifically comprises the following steps: Figures 3 to 5

[0038] 1.1, forming a straight cylinder-shaped bladder 1;

[0039] 1.2, sending the bladder 1 into a mold for vulcanization to reach a semi-vulcanization state, in which the rubber molecular chain has not yet formed a network structure and still has a certain fluidity, so that the bladder 1 can be expanded and shaped;

[0040] 1.3, expanding and shaping the semi-vulcanized bladder 1 at positions corresponding to the upper ring 41, the lower ring 42 and the guide sleeve 6, respectively, and the expansion method adopts air pressure expansion, until the outer surface of the bladder 1 is completely attached to the inner surface of the upper ring 41, the lower ring 42 and the guide sleeve 6 and is bonded together under the fluidity of the rubber, and will not shrink back;

[0041] 1.4, sending the bladder 1 with the upper ring 41, the lower ring 42 and the guide sleeve 6 into a mold for secondary vulcanization, the secondary vulcanization temperature is 150℃, the pressure is 1MPA, and the vulcanization time is 10min, so that the rubber is completely shaped, and the bladder 1, the upper ring 41, the lower ring 42 and the guide sleeve 6 are fixed into an integrated structure.

[0042] Step two, the upper air chamber 2 and the piston 3 of the air spring are respectively arranged in the upper and lower ends of the bladder 1, and are pressed on the upper ring 41 and the lower ring 42 by external force, so that the bladder 1 is tightly fixed on the upper air chamber 2 and the piston 3 through the deformation of the upper ring 41 and the lower ring 42.

[0043] ​Working principle: Since the skin bag 1, the upper pressing ring 41, the lower pressing ring 42 and the guide sleeve 6 are fixedly connected into an integrated structure, the internal support ring is cancelled, so that during on-site assembly, only the two ends of the skin bag 1 are assembled and pressed against the upper air chamber 2 and the piston 3 respectively, the number of on-site assembly parts is reduced, the positioning difficulty is reduced, the positioning accuracy is improved, the air spring assembly assembly quality is greatly improved, and the production capacity is greatly improved.

[0044] An air spring, comprising a skin bag 1, an upper air chamber 2, a piston 3, an upper pressing ring 41, a lower pressing ring 42 and a guide sleeve 6, the skin bag 1, the upper pressing ring 41, the lower pressing ring 42 and the guide sleeve 6 are fixedly connected into an integrated structure, the upper pressing ring 41 is fixedly connected to the outer circle of the upper end of the skin bag 1, the lower pressing ring 42 is fixedly connected to the outer circle of the lower end of the skin bag 1, and the guide sleeve 6 is arranged outside the skin bag 1 and fixedly connected to the middle section of the skin bag 1.

[0045] Example two

[0046] The difference between this embodiment and example one is that in step 1.3, the inner surfaces of the upper pressing ring 41, the lower pressing ring 42 and the guide sleeve 6 are smeared with adhesive to increase the firmness of adhesion.

[0047] Example three

[0048] The difference between this embodiment and example one is that in step 1.3, the expansion method adopts a mechanical expansion type, as shown in Figure 6 The lower end of the skin bag 1 adopts a frustum-shaped expansion block 7, and the middle section and the upper end of the skin bag 1 also adopt corresponding expansion blocks, so as to expand the skin bag 1.

[0049] Example four

[0050] The difference between this embodiment and example one is that in step 1.3, the expansion method adopts a mechanical expansion type, as shown in Figure 7 The lower end, the middle section and the upper end of the skin bag 1 are respectively expanded by an expansion tool 8.

[0051] The expansion tool 8 is similar to an umbrella rib structure, comprising a middle rod 81, a shaping plate 82, a roller 83 and a sliding block 84; a plurality of shaping plates 82 are evenly distributed around the circumference of the middle rod 81, the upper end of each shaping plate 82 is rotatably connected to the middle rod 81, and the lower end of each shaping plate 82 is provided with a roller 83; the cross section of the sliding block 84 gradually increases from top to bottom, the middle rod 81 passes through the center of the sliding block 84 and is in sliding cooperation with the sliding block 84, and the rollers 83 of each shaping plate 82 are in rolling cooperation with the outer side surface of the sliding block 84.

[0052] In use, the expansion tool 8 is inserted into the skin bag 1, and the sliding block 84 is pushed upward to expand the skin bag 1.

[0053] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; 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 embodiments of the present application.

Claims

1. A method for producing an air spring, characterized in that: The following steps are involved: Step 1: The bladder, upper pressure ring, lower pressure ring and guide sleeve of the air spring are vulcanized and fixedly connected into an integrated structure. The upper pressure ring is fixedly connected to the upper outer ring of the bladder, the lower pressure ring is fixedly connected to the lower outer ring of the bladder, and the guide sleeve is arranged on the outside of the bladder and fixedly connected to the middle section of the bladder; Step 1 includes the following steps: 1.1, forming a straight cylindrical bladder; 1.2, put the bladder into the mold for vulcanization to reach a semi-vulcanized state; 1.

3. Expand and shape the semi-vulcanized bladder corresponding to the upper pressure ring, lower pressure ring and guide sleeve respectively until the outer surface of the bladder is respectively in contact with the inner surface of the upper pressure ring, lower pressure ring and guide sleeve and bonded together under the action of the fluidity of the rubber; 1.

4. Send the bladder with the upper pressure ring, lower pressure ring and guide sleeve into the mold for secondary vulcanization to make it completely fixed and realize that the bladder, upper pressure ring, lower pressure ring and guide sleeve are fixed into an integrated structure; Step 2: Install the upper air chamber and piston of the air spring into the upper and lower ends of the bladder respectively, press the upper and lower pressure rings with external force, and deform the upper and lower pressure rings to tighten and fix the bladder on the upper air chamber and piston.

2. The air spring production method according to claim 1, characterized in that: In step 1.3, apply adhesive to the inner surfaces of the upper pressure ring, lower pressure ring, and guide sleeve respectively.

3. The air spring production method according to claim 1, wherein: In step 1.3, mechanical expansion is used as the expansion method.

4. The air spring production method according to claim 3, characterized in that: The lower end, middle section and upper end of the bladder are expanded respectively using expansion blocks of corresponding shapes.

5. The air spring production method according to claim 3, characterized in that: An expansion tool is used to expand the lower end, middle section and upper end of the bladder respectively. The expansion tool includes an intermediate rod, a shaping plate, rollers and a slider; multiple shaping plates are evenly distributed around the intermediate rod, and the upper end of each shaping plate is rotatably connected to the intermediate rod, and the lower end of each shaping plate is provided with a roller; the cross-section of the slider gradually increases from top to bottom, the intermediate rod passes through the center of the slider and slides with the slider, and the rollers of each shaping plate are rollingly fitted on the outer side of the slider.

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