Novel integral bag skin structure for air spring

Abstract

The utility model provides a novel air spring's integral bladder skin structure, including bladder skin, upper buckling ring, lower buckling ring, locking ring and support ring, bladder skin is extruded and woven integratedly, bladder skin, upper buckling ring, lower buckling ring, locking ring, support ring adopt heat vulcanization bonding mode synchronous vulcanization integration, and the integral bladder skin structure is formed by extrusion and weaving. An inner cavity structure of an adopted vulcanization mold is matched with the outline of the bag skin, the vulcanization mold comprises an upper mold, a middle mold and a lower mold which are sequentially in butt joint, an annular groove matched with the locking ring is formed in the inner wall of the upper end of the middle mold, and an annular groove matched with the supporting ring is formed in the inner wall of the lower end of the middle mold. An annular groove matched with the upper buckling ring is formed in the inner wall of the upper end of the upper die, and an annular groove matched with the lower buckling ring is formed in the inner wall of the lower end of the lower die. By the adoption of the technical scheme, the capsule skin and the rings are vulcanized into a whole synchronously, the problem easily occurring when a traditional capsule skin structure is assembled is solved, and the product performance is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to a novel integral bladder skin structure for air springs. Background Art

[0002] The bladder skin, also known as the airbag, is an essential component of the automobile air suspension. It is buckled on the upper and lower end covers, the base and other connecting parts to form a closed chamber. The air is inflated and deflated to achieve air shock absorption, providing a high level of extreme comfort. The bladder skin is a core component of the air spring assembly. The performance of the bladder skin determines the smoothness and handling stability of the entire air suspension assembly.

[0003] At present, the bladder skins on the market are basically made of inner and outer rubber layers and at least two layers of rubber cord fabrics rolled into a cylindrical structure (also called tire blank) by the traditional layer-pasting method, and then placed in a vulcanization mold and vulcanized into a rubber elastic body after being heated by a heat medium. During assembly, the assembly parts connected to the bladder skin are assembled and fastened separately using sub-components such as buckling rings, intermediate support rings and even locking rings. Because rubber products are relatively soft, there are problems such as inaccurate ring positioning, non-concentricity, relative sliding, assembly equipment tooling and high operating requirements. Utility Model Content

[0004] The utility model provides a novel integral bladder structure for an air spring, which solves the problems of inaccurate ring positioning and low assembly efficiency that are prone to occur during the assembly of a traditional bladder structure by synchronously vulcanizing the bladder with upper and lower buckle rings, a locking ring and a support ring.

[0005] The utility model provides the following technical solutions:

[0006] A novel integral bladder structure for an air spring comprises a bladder, an upper buckle ring, a lower buckle ring, a locking ring and a support ring. The bladder is formed as an integral body by extrusion and weaving. The bladder, the upper buckle ring, the lower buckle ring, the locking ring and the support ring are simultaneously vulcanized into one body by hot vulcanization bonding. The inner cavity structure of the vulcanization mold used matches the contour of the bladder. The vulcanization mold comprises an upper mold, a middle mold and a lower mold which are connected in sequence. The inner wall of the upper end of the middle mold has a ring groove matching the locking ring, the inner wall of the lower end of the middle mold has a ring groove matching the support ring, the inner wall of the upper end of the upper mold has a ring groove matching the upper buckle ring, and the inner wall of the lower end of the lower mold has a ring groove matching the lower buckle ring.

[0007] Optionally, the shape of the capsule skin includes one of a cylindrical shape, a trumpet shape, a gourd shape or a heterogeneous structure.

[0008] Optionally, the upper buckling ring, the lower buckling ring, the locking ring and / or the supporting ring are seamless rings or welded rings.

[0009] Optionally, the upper buckling ring, the lower buckling ring, the locking ring and / or the supporting ring are subjected to surface treatment and then an adhesive is sprayed on the inner side of the ring.

[0010] Optionally, the outer walls at both ends of the middle mold have step rings, the inner wall at the lower end of the upper mold has an inverted step ring that is pressed into the step ring at the upper end of the middle mold, and the inner wall at the upper end of the lower mold has an inverted step ring that is pressed into the step ring at the lower end of the middle mold.

[0011] Optionally, the outer walls of the upper end of the upper mold and the lower end of the lower mold are provided with step rings, and the vulcanization mold also includes an upper locking mechanism and a lower locking mechanism. The inner wall of the lower end of the upper locking mechanism is provided with an inverted step ring that matches the step ring at the upper end of the upper mold, and the inner wall of the upper end of the lower locking mechanism is provided with an inverted step ring that matches the step ring at the lower end of the lower mold.

[0012] The new air spring integral bladder structure of the embodiment of the utility model abandons the traditional layer-by-layer molding process and adopts the extrusion weaving technology to form the bladder in one piece; and the bladder is simultaneously vulcanized into one with the upper and lower buckle rings, the locking ring and the support ring by hot vulcanization bonding. Compared with the traditional bladder structure, there is no need to assemble the bladder embryo with the buckling ring, the support ring and other components, which can solve the problem that the ring cannot be accurately positioned during the assembly of the traditional bladder structure, resulting in unequal installation and possible relative sliding, and effectively avoid the risk of ring falling off during product application; at the same time, it also solves the problem of high requirements for assembly equipment tooling and operation, which can effectively improve the assembly efficiency; and the finished product EOL test is stable and the pass rate is high.

[0013] The novel integral bladder skin structure for the air spring of the embodiment of the utility model also has the advantages of simple structure, reliable performance, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a structural schematic diagram of a novel integral bladder skin structure and a vulcanization mold for an air spring according to an embodiment of the utility model;

[0016] Figure 2 This is a structural schematic diagram of a novel integral bladder skin structure for an air spring according to an embodiment of the utility model;

[0017] Figure 3 It is a partial enlarged schematic diagram of the structure of the integral bladder skin structure for the new air spring according to an embodiment of the utility model.

[0018] Reference numerals:

[0019] 1. Bag skin; 2. Upper buckle ring; 3. Locking ring; 4. Support ring; 5. Lower buckle ring; 6. Middle mold; 7. Upper mold; 8. Lower mold; 9. Upper locking mechanism; 10. Lower locking mechanism. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited to the basic implementation disclosed below.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] like Figure 1-3 As shown, a new type of integral bladder structure for an air spring according to an embodiment of the utility model comprises a bladder 1, an upper buckle ring 2, a lower buckle ring 5, a locking ring 3 and a support ring 4. The bladder 1 is an extruded woven one-piece bladder, and is synchronously vulcanized into one with the upper buckle ring 2, the lower buckle ring 5, the locking ring 3 and the support ring 4 by hot vulcanization bonding. The inner cavity structure of the vulcanization mold used matches the contour of the bladder 1. The vulcanization mold comprises an upper mold 7, a middle mold 6 and a lower mold 8 which are connected in sequence. The inner wall of the upper end of the middle mold 6 has a ring groove matching the locking ring 3, the inner wall of the lower end of the middle mold 6 has a ring groove matching the support ring 4, the inner wall of the upper end of the upper mold 7 has a ring groove matching the upper buckle ring 2, and the inner wall of the lower end of the lower mold 8 has a ring groove matching the lower buckle ring 5.

[0023] In the integral bladder skin structure for the new air spring of the embodiment of the utility model, the bladder skin 1 is equivalent to the bladder skin embryo. The bladder skin abandons the traditional layer-pasting molding process and is made by extrusion and weaving (winding) one-piece molding technology; the bladder skin structure synchronously vulcanizes the bladder skin with the upper and lower buckle rings, the locking ring 3, and the support ring 4 into one, and there is no need to perform the assembly steps of the bladder skin embryo and the buckling ring, the support ring 4 and other components. It can solve the problem that the buckling ring, the support ring 4 and the locking ring 3 cannot be accurately positioned during the assembly of the traditional bladder skin structure, resulting in unequal installation and possible relative sliding, and effectively avoid the risk of ring falling during product application; at the same time, it also solves the problem of high requirements for assembly equipment tooling and operation, and can effectively improve the assembly efficiency; and the finished product EOL test is stable and the pass rate is high.

[0024] In practical applications, the structure of the bladder skin 1 can be cylindrical, trumpet-shaped, gourd-shaped, and of course, other special structures. It can be based on the vehicle input mass parameters, suspension motion parameters, suspension working stroke, empty spring design load and spatial layout parameters in the application conditions, and fit the initial stiffness curve data with the required stiffness curve to finally calculate the contour of the bladder skin, and calculate the bladder skin length, effective area, design position of the ring, etc.

[0025] In this embodiment, the upper buckling ring 2, the lower buckling ring 5, the locking ring 3 and / or the supporting ring 4 can be seamless rings or welded rings, and the ring surface needs to be sandblasted to increase the surface roughness, and then degreased and phosphated, and then a hot vulcanized adhesive is applied to the ring surface (it can be a single coating or a double coating), and finally dried; in practice, the ring surface treatment can also be replaced by spraying an adhesive on the inside of the ring after the ring is electroplated.

[0026] According to the exemplary embodiment of the utility model, the vulcanization mold used in the bladder structure adopts a segmented structure, and the inner cavity after the combination of each segment mold is a bladder wheel hub; in order to facilitate the installation of the ring and the disassembly of the finished product, the mold is opened and closed at the ring design position, and the ring grooves corresponding to each ring are pre-opened on the inner wall of the mold. Specifically, the ring groove corresponding to the locking ring 3 is opened at the joint of the upper mold 7 and the middle mold 6, and the ring groove corresponding to the support ring 4 is opened at the joint of the lower mold 8 and the middle mold 6, and the ring grooves corresponding to the upper and lower buckle rings are opened at both ends of the upper and lower molds. The joints of each segment mold are then docked by step pressing. Specifically, the outer walls of the upper and lower ends of the middle mold 6 have step rings (annular steps), the inner wall of the lower end of the upper mold 7 has an inverted step ring that presses the step ring at the upper end of the middle mold 6, and the inner wall of the upper end of the lower mold 8 has an inverted step ring that presses the step ring at the lower end of the middle mold 6. The upper and lower molds press the middle mold 6, which is equivalent to the middle mold 6 adopting an open door design, which is convenient for demolding the product after vulcanization.

[0027] Further, the vulcanization mold further includes an upper locking mechanism 9 and a lower locking mechanism 10, which are used for locking at the upper and lower ends respectively. Specifically, the outer walls of the upper end of the upper mold 7 and the lower end of the lower mold 8 have step rings, the inner wall of the lower end of the upper locking mechanism 9 has an inverted step ring matching the step ring at the upper end of the upper mold 7, and the inner wall of the upper end of the lower locking mechanism 10 has an inverted step ring matching the step ring at the lower end of the lower mold 8. The upper locking mechanism 9 and the lower locking mechanism 10 can be ring / cylindrical structures.

[0028] In an optional embodiment, the processing method of the novel air spring integral bladder skin structure may include the following process:

[0029] 1. Design and calculate the bladder hub, bladder length, effective area and design position of each ring, and extrude and weave the bladder;

[0030] 2. Design and make vulcanization mold (refer to the above structure and requirements);

[0031] 3. Make each ring and perform surface treatment and apply adhesive;

[0032] 4. Place each ring in the corresponding position of the vulcanization mold, then put in the bladder skin, close the middle mold, upper and lower molds in turn, and lock the upper and lower locking mechanisms to close the mold;

[0033] 5. Pass heat medium to cure;

[0034] Finally, the bladder skin (bladder skin embryo) is synchronously vulcanized with the ring coated with hot vulcanizing adhesive to become one, and demolded after the product is formed.

[0035] In actual application scenarios, the upper and lower buckle rings, support rings, locking rings, etc. in the integral bladder skin structure for the new air spring of the embodiment of the utility model can all adopt devices with corresponding functions in the prior art. In addition, other devices or components can be set in the integral bladder skin structure for the new air spring, or the actual installation position of each device or component can be adjusted to achieve the practical application or other functions of the integral bladder skin structure for the new air spring. For example, the support rings and locking rings in the integral bladder wall structure can be increased or decreased according to design requirements, and accordingly, the vulcanization mold is increased or decreased in sections, and the ring grooves on the inner wall of the mold are also increased or decreased accordingly.

[0036] It should be pointed out that, according to the needs of implementation, the various components described in the embodiments of the present utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present utility model.

[0037] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A novel integral bladder skin structure for an air spring, characterized in that: It includes a bladder skin, an upper buckle ring, a lower buckle ring, a locking ring and a support ring. The bladder skin is formed by extrusion and weaving. The bladder skin, the upper buckle ring, the lower buckle ring, the locking ring and the support ring are synchronously vulcanized into one by hot vulcanization bonding. The inner cavity structure of the vulcanization mold used is matched with the contour of the bladder skin. The vulcanization mold includes an upper mold, a middle mold and a lower mold that are connected in sequence. The inner wall of the upper end of the middle mold has a ring groove matching the locking ring, the inner wall of the lower end of the middle mold has a ring groove matching the support ring, the inner wall of the upper end of the upper mold has a ring groove matching the upper buckle ring, and the inner wall of the lower end of the lower mold has a ring groove matching the lower buckle ring.

2. A novel integral bladder skin structure for an air spring according to claim 1, characterized in that: The shape of the capsule skin includes one of a cylindrical shape, a trumpet shape, a gourd shape or a heterogeneous structure.

3. The novel integral bladder skin structure for air spring according to claim 1 is characterized in that: The upper buckling ring, the lower buckling ring, the locking ring and / or the supporting ring are seamless rings or welded rings.

4. The novel integral bladder skin structure for air spring according to claim 1 is characterized in that: The upper buckling ring, the lower buckling ring, the locking ring and / or the supporting ring are subjected to surface treatment and then an adhesive is sprayed on the inner side of the ring.

5. The novel integral bladder skin structure for air spring according to claim 1 is characterized in that: The outer walls at both ends of the middle mold have step rings, the inner wall at the lower end of the upper mold has an inverted step ring that is pressed into the step ring at the upper end of the middle mold, and the inner wall at the upper end of the lower mold has an inverted step ring that is pressed into the step ring at the lower end of the middle mold.

6. The novel integral bladder skin structure for air spring according to claim 1 is characterized in that: The outer walls of the upper end of the upper mold and the lower end of the lower mold are provided with step rings, and the vulcanization mold also includes an upper locking mechanism and a lower locking mechanism. The inner wall of the lower end of the upper locking mechanism is provided with an inverted step ring matching the step ring at the upper end of the upper mold, and the inner wall of the upper end of the lower locking mechanism is provided with an inverted step ring matching the step ring at the lower end of the lower mold.

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