Assembly device for air spring

Abstract

The utility model relates to the technical field of air springs, and discloses an assembling device of an air spring. The assembling device of the air spring is used for installing the supporting ring of the air spring in the bag skin of the air spring. The assembling device comprises an inflation bag, a fixing cylinder, a first fixing ring and a second fixing ring. The air inflation bag can be arranged in the bag skin, and the bag skin can be tightly pressed on the inner wall of the fixing cylinder when the air inflation bag is in an air inflation state. When the bag skin is pressed on the inner wall of the fixing cylinder by the inflatable bag, the first fixing ring and the second fixing ring can be arranged in the bag skin in a sleeved mode, and the first fixing ring and the second fixing ring are located at the first end and the second end, opposite in the axial direction of the fixing cylinder, of the bag skin respectively. By means of the assembling device, when the supporting ring is installed on the bag skin of the air spring, the bag skin can be prevented from being strained, and therefore the sealing performance of the bag skin is guaranteed, and the service life of the bag skin is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of air springs, and in particular to an assembly device for an air spring. Background Art

[0002] Air springs are components that use the compressibility of gas to achieve elastic support and are widely used in vehicle suspension systems. They typically consist of an aluminum casing, a rubber bladder, and a support ring. The support ring is larger in diameter than the rubber bladder and needs to be installed inside the rubber bladder to fit snugly onto the aluminum casing, effectively pressing the rubber bladder and aluminum casing together.

[0003] Currently, air spring support rings mostly use physical stretching to open the rubber bladder, and then install the support ring into the corresponding position of the rubber bladder. Therefore, the rubber bladder is easily damaged during the installation of the support ring, thereby affecting the sealing and life of the rubber bladder. Utility Model Content

[0004] An embodiment of the present application provides an assembly device for an air spring.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides an assembly device for an air spring, which is used to install the support ring of an air spring in the bladder skin of the air spring. The assembly device includes an inflatable bag, a fixed tube, a first fixed ring and a second fixed ring. The inflatable bag can be arranged in the bladder skin, and the inflatable bag can press the bladder skin against the inner wall of the fixed tube when inflated. When the bladder skin is pressed against the inner wall of the fixed tube by the inflatable bag, the first fixed ring and the second fixed ring can be sleeved in the bladder skin, and the first fixed ring and the second fixed ring are respectively located at the opposite first and second ends of the bladder skin along the first direction, so as to press the first and second ends of the bladder skin onto the inner wall of the fixed tube, respectively, and the first direction is parallel to the axial direction of the fixed tube.

[0007] In some embodiments of the present application, the bladder skin is expanded by inflating the air bag so that the bladder skin is pressed against the fixed tube by the air bag, thereby ensuring the uniformity of the force applied to the bladder skin when it is expanded, and preventing the bladder skin from being stretched, thereby ensuring the sealing effect and service life of the bladder skin. In addition, after the bladder skin is pressed against the fixed tube, the bladder skin can be fixed to the inner wall of the fixed tube at opposite ends along the first direction by the first fixing ring and the second fixing ring, so as to facilitate the subsequent installation of the support ring. Fixing the bladder skin by the first fixing ring and the second fixing ring can also ensure the uniformity of the force applied to the bladder skin, so that the bladder skin can be evenly expanded during the entire process of installing the support ring, thereby further ensuring that the bladder skin is not stretched.

[0008] In a possible implementation of the first aspect, a plurality of through holes are formed on the wall of the fixed cylinder, and the plurality of through holes are located between the first end and the second end along the first direction, and each of the plurality of through holes is connected to the negative pressure device.

[0009] In some embodiments of the present application, a negative pressure device can evacuate air from the through-hole, thereby creating a negative pressure state in the through-hole, allowing the bladder skin to be adsorbed onto the inner wall of the fixed cylinder. It is understood that since the first and second ends of the bladder skin are respectively secured by the first and second securing rings, securing other portions of the bladder skin through the negative pressure state of the through-hole can improve the securing effect of the bladder skin.

[0010] In a possible implementation of the first aspect, the plurality of through holes are arranged at intervals along the circumference of the fixed cylinder.

[0011] It can be understood that in the embodiment of the present application, the through holes arranged at intervals along the axial direction of the fixed cylinder can improve the uniformity of the through holes in adsorbing the capsule skin, so as to avoid damage to the capsule skin caused by uneven adsorption of the capsule skin.

[0012] In a possible implementation of the first aspect, along the first direction, the plurality of through holes are located in a middle portion of the fixing cylinder.

[0013] In one possible implementation of the first aspect, the first fixing ring includes a first annular wall and a second annular wall extending in a first direction, the first annular wall and the second annular wall being stacked in the first direction. The first annular wall and the second annular wall have the same inner diameter, and the outer diameter of the first annular wall is larger than the outer diameter of the second annular wall.

[0014] In one possible implementation of the first aspect, the outer diameter of the first annular wall is greater than the inner diameter of the fixed tube. The outer diameter of the second annular wall is less than or equal to the inner diameter of a bladder cover that is sleeved over the inflatable bladder when the bladder is inflated, such that the second annular wall can press the first end of the bladder cover against the inner wall of the fixed tube.

[0015] In some embodiments of the present application, because the outer diameter of the second annular wall is smaller than the inner diameter of the bladder shell, the second annular wall can extend into the bladder shell, thereby pressing the bladder shell against the inner wall of the fixing tube. Furthermore, because the outer diameter of the first annular wall is larger than the inner diameter of the fixing tube, the fixing tube can provide support for the first fixing ring, thereby securing the first fixing ring.

[0016] In a possible implementation of the first aspect above, the first annular wall and the second annular wall are an integrally formed structure.

[0017] In a possible implementation of the first aspect, the assembly device further includes a telescopic structure fixedly connected to the inflatable bag, and capable of moving the inflatable bag into or out of the fixed cylinder along a first direction.

[0018] In some embodiments of the present application, the telescopic structure can be used to pull the inflatable bag away from the fixed tube, thereby facilitating the installation of the bag cover over the inflatable bag. Furthermore, after the first and second fixing rings secure the bag cover to the fixed tube, the telescopic structure can be used to pull the inflatable bag away from the fixed tube to facilitate installation of the support ring.

[0019] In a possible implementation of the first aspect, the assembly device further includes an inflation device, the inner cavity of the airbag is in communication with the inflation device, and the inflation device is capable of inflating the airbag to put the airbag into an inflated state.

[0020] In a possible implementation of the first aspect above, the assembly device further includes an installation structure, which can fix the bladder skin on the inner wall of the fixing cylinder and can install the support ring into the bladder skin along the first direction after the inflatable bladder is pulled out of the fixing cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1A A top view showing an assembly device for a support ring of an air spring;

[0022] Figure 1B A cross-sectional view showing an assembly device for a support ring of an air spring ( Figure 1A AA cross-section of );

[0023] Figure 2A According to some embodiments of the present application, a top view of an assembly device is shown;

[0024] Figure 2B According to some embodiments of the present application, a schematic cross-sectional structure diagram of an assembly device is shown ( Figure 2A BB section in);

[0025] Figure 3A According to some embodiments of the present application, a schematic diagram of a structure in which an inflatable bag does not extend into a fixing tube is shown;

[0026] Figure 3B According to some embodiments of the present application, a schematic structural diagram of an inflatable bag entering an inflated state in a fixed tube is shown;

[0027] Figure 3C According to some embodiments of the present application, a schematic structural diagram of installing a support tube into a rubber bladder is shown. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0029] The present application provides an assembly device for an air spring, which can evenly expand the rubber bladder skin of the air spring onto the inner wall of the fixed tube through an inflatable bag, and then fix the expanded rubber bladder skin to the inner wall of the fixed tube through a fixing ring and other devices, and finally install the support ring into the inside of the rubber bladder skin to complete the installation of the support ring. The installation process does not require expanding the rubber bladder skin by stretching, thereby avoiding the rubber bladder skin from being stretched, thereby ensuring the sealing performance and life of the rubber bladder skin.

[0030] Next, we will introduce the installation process of the air spring.

[0031] For example, Figure 1A and Figure 1B A schematic diagram of an assembly device for a support ring of an air spring is shown, wherein: Figure 1A A top view of the mounting arrangement of the support ring of the air spring is shown. Figure 1B A cross-sectional view showing an assembly device for a support ring of an air spring ( Figure 1A AA cross-section of the image).

[0032] In the figures herein, the X direction is the length direction of the assembly device 100, the Y direction is the width direction of the assembly device 100, and the Z direction is the height direction of the assembly device 100. The X direction, the Y direction, and the Z direction may be perpendicular to each other.

[0033] Reference Figure 1A and Figure 1B The assembly device 100 of the support ring of the air spring (hereinafter referred to as the assembly device 100 ) includes a fixing tool 10 and a stretching tool 20 .

[0034] The fixing fixture 10 includes a base 11 and a fixing platform 12 . The fixing platform 12 is a cylindrical structure. The fixing platform 12 is disposed on the base 11 along the Z direction and forms a step surface 13 with the base 11 .

[0035] The air spring's rubber bladder 01 is cylindrical. When installing the support ring 02, it can be placed on the mounting platform 12, allowing it to extend in the Z direction. The rubber bladder 01 includes a first end 011 and a second end 012 that are opposite in the Z direction. The second end 012 is positioned on a stepped surface, allowing the mounting platform 12 to support and secure the rubber bladder 01 and to expand the second end 012 of the rubber bladder 01.

[0036] Along the Z direction, the height of the first end portion 011 of the rubber bladder skin 01 is higher than the fixed platform 12. To this end, the first end portion 011 of the rubber bladder skin 01 can be stretched by the stretching tool 20, thereby stretching the first end portion 011 of the rubber bladder skin 01 so that the support ring 02 can enter the interior of the rubber bladder skin 01 from the first end portion 011 of the rubber bladder skin 01.

[0037] After the rubber bladder 01 is placed on the fixed platform 12, stretching fixtures 20 are spaced apart around the circumference of the rubber bladder 01. The stretching fixtures 20 include stretching arms 21 extending in the N direction, perpendicular to the Z direction. They also include fixed arms 22 extending in the Z direction, which are used to stretch the rubber bladder 01.

[0038] For example, when stretching the rubber bladder 01, the stretching tool 20 can approach the first end 011 of the rubber bladder 01 along the N direction. The stretching tool 20 then extends the fixed arm 22 from the first end 011 of the rubber bladder 01 into the interior of the rubber bladder 01 along the Z direction. The stretching tool 20 can then move away from the rubber bladder 01 along the N direction, causing the fixed arm 22 of the stretching tool 20 to stretch the first end 011 of the rubber bladder 01 outward. In other words, multiple stretching tools 20 can stretch the first end 011 of the rubber bladder 01 outward along the circumference of the rubber bladder 01, thereby expanding the first end 011 of the rubber bladder 01. Finally, the processing personnel or other mechanical devices (such as grippers) can insert the support ring 02 from the first end 011 of the rubber bladder 01 into the interior of the rubber bladder 01 to complete the installation of the support ring 02.

[0039] It is understood that during the installation of the support ring 02 within the rubber bladder 01, multiple stretching tools 20 are required to stretch the first end 011 at multiple different points along the circumference of the rubber bladder 01, thereby expanding the first end 011. In other words, this stretching method uses multi-point stretching rather than a 360° uniform stretching. Therefore, the installation of the support ring 02 can easily damage the rubber bladder 01, thereby affecting the sealing performance and service life of the rubber bladder 01.

[0040] In order to solve the above problems, the present application proposes an assembly device for an air spring, which includes an inflatable bag, a fixing tube, a first fixing ring and a second fixing ring. When installing a support ring for the rubber bag skin, the rubber bag skin can be placed on the inflatable bag, and the inflatable bag is inflated to expand the rubber bag skin so that the rubber bag skin fits the fixing tube, and then the rubber bag skin is fixed to the fixing tube through the first fixing ring and the second fixing ring, and finally the support ring is installed inside the rubber bag skin.

[0041] In the assembly device of the air spring of the present application, the rubber bladder skin is evenly expanded by inflating the air bag, thereby reducing damage to the rubber bladder skin during the expansion process, ensuring the sealing performance of the rubber bladder skin, and improving the service life of the rubber bladder skin.

[0042] Next, the assembly device in the embodiment of the present application is introduced.

[0043] For example, Figure 2A and Figure 2B FIG. 1 shows a schematic structural diagram of an assembly device 100 of the present application, wherein: Figure 2A According to some embodiments of the present application, a top view of an assembly device 100 is shown. Figure 2B According to some embodiments of the present application, a cross-sectional structural diagram of an assembly device 100 is shown ( Figure 2A BB section in the figure).

[0044] Reference Figure 2A and Figure 2B The assembly device 100 includes an inflatable bag 30 , a fixing tube 40 , a first fixing ring 50 and a second fixing ring 60 .

[0045] The inflatable bag 30 can be disposed in a rubber bag skin 01 (as an example of a bag skin), and when inflated, the inflatable bag 30 can press the rubber bag skin 01 against the inner wall of the fixing tube 40 .

[0046] For example, when installing the support ring 02 on the rubber bladder skin 01, the rubber bladder skin 01 can be placed on the inflatable bladder 30, that is, the inflatable bladder 30 is placed inside the rubber bladder skin 01. The inflatable bladder 30 can then enter the fixed tube 40 and be inflated to enter the inflated state, thereby pressing the rubber bladder skin 01 against the inner wall of the fixed tube 40.

[0047] In some embodiments of the present application, after the rubber bladder 01 is pressed against the inner wall of the fixed tube 40 by the inflatable bladder 30, the first fixing ring 50 and the second fixing ring 60 can be installed within the rubber bladder 01. The first fixing ring 50 and the second fixing ring 60 are respectively located at the first end 011 and the second end 012 of the rubber bladder 01, which are opposite in the Z direction (or the axial direction of the fixed tube 40, where the Z direction can be used as an example of a first direction). This presses the first end 011 and the second end 012 of the rubber bladder 01 against the inner wall of the fixed tube 40.

[0048] In some embodiments of the present application, the first fixing ring 50 includes a first annular wall 51 and a second annular wall 52 extending along the Z direction, and the first annular wall 51 and the second annular wall 52 are stacked along the Z direction. The first annular wall 51 and the second annular wall 52 can be an integrally formed structure, or the first annular wall 51 and the second annular wall 52 can be fixed together by gluing, clamping, or welding. The embodiments of the present application do not limit the method of fixing the first annular wall 51 and the second annular wall 52.

[0049] The inner diameter d1 of the first annular wall 51 and the inner diameter d2 of the second annular wall 52 are the same, and the outer diameter d3 of the first annular wall 51 is larger than the outer diameter d4 of the second annular wall 52, so that the surfaces of the first annular wall 51 and the second annular wall 52 opposite to the fixed cylinder 40 along the Z direction form a stepped surface.

[0050] The outer diameter d3 of the first annular wall 51 is greater than the inner diameter d5 of the fixing cylinder 40 , so that the fixing cylinder 40 can receive the first annular wall 51 to fix the first fixing ring 50 .

[0051] The outer diameter d4 of the second annular wall 52 is less than or equal to the inner diameter d6 of the rubber bladder cover 01 that fits over the inflatable bladder 30 when the bladder 30 is inflated. This allows the second annular wall 52 to extend into the fixing tube 40 and press the first end 011 of the rubber bladder cover 01 against the inner wall of the fixing tube 40, thereby evenly expanding the first end 011 of the rubber bladder cover 01 to facilitate installation of the support ring 02.

[0052] Similarly, the second fixing ring 60 includes a third annular wall 61 and a fourth annular wall 62. The sizes of the third annular wall 61 and the fourth annular wall 62 and their functions at the second end 012 of the rubber bag skin 01 can refer to the sizes of the first annular wall 51 and the second annular wall 52 of the first fixing ring 50 and their functions at the first end 011. The embodiments of the present application do not elaborate on the second fixing ring 60.

[0053] In some embodiments of the present application, a plurality of through holes 41 are formed in the wall of the fixed tube 40. Along the Z direction, the plurality of through holes 41 are located between the first end 011 and the second end 012. Furthermore, each of the plurality of through holes 41 is in communication with the negative pressure device 70. When the inflatable bladder 30 enters an inflated state, thereby pressing the rubber bladder skin 01 against the inner wall of the fixed tube 40, the negative pressure device 70 can absorb air within each through hole 41, thereby forming a negative state within each through hole 41, thereby adsorbing the rubber bladder skin 01 against the inner wall of the fixed tube 40, thereby further improving the fixing effect of the rubber bladder skin 01.

[0054] In some embodiments of the present application, multiple through holes 41 are spaced apart along the circumference of the fixed cylinder 40. Furthermore, along the Z direction, multiple through holes 41 are located in the center of the fixed cylinder 40. It is understood that since the first end 011 and second end 012 of the rubber bladder 01, which are opposite in the Z direction, are secured by the first fixing ring 50 and the second fixing ring 60, respectively, multiple through holes 41 can be located in the center of the fixed cylinder 40 along the Z direction, thereby securing the rubber bladder 01 in the center of the fixed cylinder 40 and improving the securing effect of the rubber bladder 01. In some embodiments of the present application, the number of through holes 41 can be determined based on the requirements for securing the rubber bladder 01, and can range from 4 to 32, for example, 4, 8, 16, etc.

[0055] Next, the installation process of the support ring 02 in the embodiment of the present application is introduced.

[0056] For example, Figures 3A to 3C A schematic diagram of the installation process of the support ring 02 of an air spring is shown. Figure 3A According to some embodiments of the present application, a schematic structural diagram is shown in which the inflatable bag 30 does not extend into the fixing tube 40 . Figure 3B According to some embodiments of the present application, a schematic structural diagram of an inflatable bag 30 entering an inflated state in a fixing tube 40 is shown. Figure 3C According to some embodiments of the present application, a structural schematic diagram of installing a support ring 02 into a rubber bladder skin 01 is shown.

[0057] Reference Figure 3A When installing the support ring 02 for the rubber bladder skin 01 of the air spring, the rubber bladder skin 01 can be placed on the inflatable bladder 30. It is understood that during this process, the inflatable bladder 30 has not yet extended into the fixing tube 40. Therefore, the staff can conveniently place the rubber bladder skin 01 on the inflatable bladder 30 manually or through other mechanical devices.

[0058] In some embodiments of the present application, the assembly device 100 further includes a telescopic structure 80, which is fixedly connected to the inflatable bag 30. The telescopic structure 80 can move the inflatable bag 30 into or out of the interior of the fixed tube 40 along the Z direction. Therefore, after the rubber bag skin 01 is placed on the inflatable bag 30, the telescopic structure 80 can move the inflatable bag 30 into the interior of the fixed tube 40.

[0059] Reference Figure 3B After the telescopic structure 80 sends the inflatable bag 30 with the rubber bag skin 01 into the interior of the fixed tube 40, the inflatable bag 30 can enter the inflated state, thereby pressing the rubber bag skin 01 onto the inner wall of the fixed tube 40.

[0060] For example, in some embodiments of the present application, the assembly device 100 also includes an inflation device 90, and the inner cavity of the inflatable bag 30 is connected to the inflation device 90. The inflation device 90 can inflate the inflatable bag 30 to make the inflatable bag 30 enter an inflated state, thereby pressing the rubber bag skin 01 onto the inner wall of the fixed tube 40.

[0061] Reference Figure 3C After the inflatable bag 30 presses the rubber bag skin 01 onto the inner wall of the fixed tube 40, the assembly device 100 can fix the rubber bag skin 01 on the inner wall of the fixed tube 40 through the first fixing ring 50, the second fixing ring 60 and the negative pressure device 70.

[0062] For example, the first fixing ring 50 and the second fixing ring 60 approach the fixing cylinder 40 along the Z direction, thereby securing the first end 011 and the second end 012 of the rubber bladder 01 to the inner wall of the fixing cylinder 40 via the second annular wall 52 and the fourth annular wall 62, respectively. Furthermore, the negative pressure device 70 can extract air from the interior of the through-hole 41, thereby creating a negative pressure state in the through-hole 41 and adsorbing the rubber bladder 01 to the inner wall of the fixing cylinder 40, thereby securing the rubber bladder 01. It should be understood that this application does not limit the order in which the first fixing ring 50, the second fixing ring 60, and the through-hole 41 are secured to the rubber bladder 01.

[0063] Then, the inflation device 90 extracts the gas in the inner cavity of the inflatable bag 30 , and then the telescopic structure 80 withdraws the inflatable bag 30 from the fixing tube 40 .

[0064] It can be understood that in the above process, the rubber bag skin 01 can be first fixed to the inner wall of the fixed tube 40 through the negative pressure device 70 and the through hole 41, and then the air in the inner cavity of the inflatable bag 30 is extracted through the inflation device 90, the telescopic structure 80 extracts the inflatable bag 30 from the fixed tube 40, and then the first end 011 and the second end 012 of the rubber bag skin 01 are fixed to the fixed tube 40 by the first fixing ring 50 and the second fixing ring 60.

[0065] Continue to refer to Figure 3C In some embodiments of the present application, the assembly device 100 further includes an installation structure 03. After the rubber bladder skin 01 is secured to the inner wall of the fixing tube 40 and the inflatable bladder 30 is removed from the fixing tube 40, the installation structure 03 can install the support ring 02 into the rubber bladder skin 01 along the Z direction, thereby completing the installation of the support ring 02. Thereafter, the negative pressure device 70 stops extracting gas from the through hole 41, and the first and second fixing rings 50 and 60 can be moved away from the fixing tube 40 along the Z direction. This allows the rubber bladder skin 01, with the support ring 02 installed, to be removed, facilitating the installation of the support ring 02 for the next rubber bladder skin 01.

[0066] It can be understood that during the installation of the support ring 02 within the rubber bladder 01, the inflatable bladder 30 can evenly expand the rubber bladder 01, i.e., the force applied to the rubber bladder 01 is more uniform in all directions, thereby preventing damage to the rubber bladder 01. Furthermore, when the first and second fixing rings 50 and 60 secure the rubber bladder 01, they also ensure that the force applied to the rubber bladder 01 is uniform in all directions, thus ensuring that the rubber bladder 01 is not damaged by uneven stretching during the complete installation of the support ring 02, thereby maintaining the sealing performance of the rubber bladder and guaranteeing the service life of the rubber bladder 01.

[0067] In the above description of this embodiment, unless otherwise specified, " / " represents "or." For example, A / B can identify either A or B. "And / or" in this document simply describes an association relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent the existence of A alone, B alone, or both A and B. Furthermore, in this embodiment, the values ​​of each data range include the end value. For example, "A=10-50" means that A can include both 10 and 50.

Claims

1. An assembly device for an air spring, for mounting a support ring of an air spring in a bladder of the air spring; characterized in that: The assembly device includes an inflatable bag, a fixing tube, a first fixing ring and a second fixing ring; The inflatable bag can be arranged in the bag skin, and when inflated, the inflatable bag can press the bag skin against the inner wall of the fixing tube; When the bladder skin is pressed against the inner wall of the fixed tube by the inflatable bag, the first fixing ring and the second fixing ring can be sleeved inside the bladder skin, and the first fixing ring and the second fixing ring are respectively located at the opposite first end and second end of the bladder skin along the first direction, so as to press the first end and the second end of the bladder skin against the inner wall of the fixed tube respectively, and the first direction is parallel to the axial direction of the fixed tube.

2. The assembly device according to claim 1, wherein: A plurality of through holes are formed on the wall of the fixed cylinder, and along the first direction, the plurality of through holes are located between the first end and the second end; Furthermore, each through hole in the plurality of through holes is communicated with the negative pressure device.

3. The assembly device according to claim 2, wherein: The plurality of through holes are arranged at intervals along the circumferential direction of the fixing cylinder.

4. The assembly device according to claim 2 or 3, characterized in that Along the first direction, the plurality of through holes are located in the middle of the fixing cylinder.

5. The assembly device according to claim 1, wherein: The first fixing ring includes a first annular wall and a second annular wall extending along the first direction, and the first annular wall and the second annular wall are stacked along the first direction; The first annular wall and the second annular wall have the same inner diameter; The outer diameter of the first annular wall is greater than the outer diameter of the second annular wall.

6. The assembly device according to claim 5, characterized in that The outer diameter of the first annular wall is greater than the inner diameter of the fixed cylinder; The outer diameter of the second annular wall is smaller than or equal to the inner diameter of the bladder skin which is sleeved on the bladder when the bladder is inflated, so that the second annular wall can press the first end of the bladder skin onto the inner wall of the fixing tube.

7. The assembly device according to claim 5 or 6, characterized in that The first annular wall and the second annular wall are integrally formed.

8. The assembly device according to claim 1, wherein: The assembly device further includes a telescopic structure, which is fixedly connected to the inflatable bag; The telescopic structure can move the inflatable bag into or out of the interior of the fixing tube along the first direction.

9. The assembly device according to claim 1, wherein: The assembly device further includes an inflation device, and the inner cavity of the inflation bag is in communication with the inflation device; The inflation device can inflate the air bag to put the air bag into an inflated state.

10. The assembly device according to claim 1, wherein: The assembly device further includes a mounting structure, which can fix the bladder skin on the inner wall of the fixing tube and can install the support ring into the bladder skin along the first direction after the inflatable bladder is pulled out of the fixing tube.

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