Installation apparatus for air-spring inner support ring

Abstract

The present application relates to the technical field of air spring installation. Provided is an installation apparatus for an air-spring inner support ring. The installation apparatus for an air-spring inner support ring comprises: a negative pressure module, which is provided with a working cavity, wherein a cavity wall of the working cavity is provided with a plurality of air holes and an air path interface, at least one air hole being in communication with an external ventilation apparatus by means of the air path interface; an expansion module, which at least comprises an elastic air bag capable of expanding and contracting in a radial direction, the outer peripheral face of the elastic air bag being used for fitting an air-spring casing; two sealing modules, each of which has an initial position for separating from the negative pressure module and a sealing position for fitting to the negative pressure module; and a guide device, which comprises at least two guide bases, wherein guide columns are provided between the guide bases, and the base bases are respectively connected to two ends of each guide column. Using the technical solution of the present application can improve installation efficiency for an air-spring inner support ring, and also does not cause friction damage during installation, improving installation accuracy for the inner support ring.

Description

Air spring inner support ring installation equipment Technical Field

[0001] This application relates to the field of air spring installation technology, and more specifically, to an air spring inner support ring installation device. This application claims priority to patent application number 2023112795066, filed with the State Intellectual Property Office of China on September 28, 2023, entitled "Air Spring Inner Support Ring Installation Device." Background Art

[0002] In recent years, air springs have gradually become popular in automobile suspensions. In order to fix the relative position of the outer casing and the bladder in the design of air springs, it has gradually become necessary to place a large-diameter steel ring into the small-diameter bladder as an inner support ring to buckle the outer casing.

[0003] At present, in the process application, there are two methods: forcibly pushing the inner support ring to press it into the inside of the bladder skin, and flipping and folding the bladder skin to move the inner support ring from the outside of the bladder skin to the inside. The first method can easily cause bladder skin wear during the squeezing process, and the second solution has low control accuracy for the position of the inner support ring. At the same time, the production efficiency of both methods is relatively low.

[0004] Currently, no effective solutions have been proposed for the above technical problems.

[0005] Summary of the Invention

[0006] The main purpose of the present application is to provide an air spring inner support ring installation device to solve the problems of low installation efficiency, component wear and low installation position accuracy in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an air spring inner support ring installation device is provided, comprising: a negative pressure module, the negative pressure module is provided with a working chamber, a plurality of air holes and a first air path interface are provided on the cavity wall of the working chamber, at least one air hole is connected to an external ventilation device through the first air path interface; an expansion module, the expansion module is arranged in the working chamber, the expansion module at least includes an elastic air bag that can expand and contract in a radial direction, the outer peripheral surface of the elastic air bag is used to cover the air spring skin, the elastic air bag expands in the radial direction of the negative pressure module, and can drive the skin to expand in the radial direction to a preset tightening state; a sealing module, there are two sealing modules, and the two sealing modules They are respectively arranged at both ends of the negative pressure module, and the sealing modules are movably arranged relative to the negative pressure module along the axial direction of the negative pressure module. The two sealing modules respectively have an initial position away from the negative pressure module and a sealing position close to the negative pressure module; wherein, when the bag skin is in a preset tensioned state, the two sealing modules can be moved along the initial position to the sealing position, so that at least part of the sealing module extends to between the bag skin and the elastic airbag to separate the bag skin from the elastic airbag; when the sealing module is in the sealing position, a sealed space is formed between the sealing module, the bag skin and the wall of the working chamber, and the sealed space forms a negative pressure space through the first air path interface, the air hole and the external ventilation equipment, so that the bag skin maintains the preset tensioned state.

[0008] Furthermore, the air spring inner support ring installation device also includes a guide device, which includes: a guide seat, at least two guide seats, multiple guide columns are arranged between the two guide seats, the two guide seats are respectively connected to the two ends of the guide column, the guide column is extended along the axial direction of the negative pressure module, and the sealing module is slidably connected to the guide column.

[0009] Furthermore, the negative pressure module is provided with a plurality of axially through-holes, at least part of the guide columns are passed through the assembly holes, the two guide seats are respectively located at both ends of the negative pressure module, and a sealing module is provided between each guide seat and the negative pressure module.

[0010] Furthermore, the plurality of air holes are arranged in a matrix.

[0011] Furthermore, the diameter of the pores is D1, and the distance between adjacent pores is L, wherein 1 mm ≤ D1 ≤ 3 mm, and L < 10 mm.

[0012] Furthermore, the working cavity includes a large diameter cavity and a small diameter cavity adjacent to each other in the axial direction, the diameter of the large diameter cavity is larger than the diameter of the small diameter cavity, and a step surface for installing the inner support ring is formed at the connection between the large diameter cavity and the small diameter cavity.

[0013] Furthermore, the thickness of the bladder skin is H1, the outer diameter of the inner support ring is D2, the diameter of the large diameter cavity is D3, and the diameter of the small diameter cavity is D4, wherein D4≥D2+2*H1+1, H1+D2 / 2≤D3-D4, and the measurement units of H1, D2, D3, and D4 are all mm.

[0014] Furthermore, the sealing module includes: an annular body, which is provided with a plurality of through holes for the guide column to pass through, and the annular body is slidably arranged along the guide column; an annular boss structure is provided along the inner circular edge of the annular body, the annular boss structure protrudes from one end of the annular body facing the negative pressure module, and the diameter of the annular boss structure is gradually reduced in the direction away from the annular body; when the bladder skin is in a preset tensioned state and the sealing module moves from the initial position to the sealing position, the annular boss structure extends between the bladder skin and the elastic airbag to separate the bladder skin from the elastic airbag.

[0015] Furthermore, an annular groove is provided on the annular body, and a sealing ring is provided in the annular groove. When the sealing module is in the sealing position, the sealing ring abuts against the end face of the negative pressure module.

[0016] Furthermore, the expansion module also includes: an upper plug, which is connected to the first end of the elastic airbag to seal the first end of the elastic airbag; a lower seat, which is connected to the second end of the elastic airbag to seal the second end of the elastic airbag, and a second air path interface is provided on the lower seat, and the internal space of the elastic airbag is connected to the external ventilation equipment through the second air path interface.

[0017] By applying the technical solution of the present application, when the elastic airbag expands and drives the bag skin to a preset tensioned state, the sealing module can separate the bag skin from the elastic airbag, and at the same time, a sealed space is formed between the sealing module, the bag skin and the wall of the working chamber. The sealed space forms a negative pressure space through the first air path interface, the air hole, and the external ventilation equipment to keep the bag skin in the preset tensioned state. At this time, the inner support ring can be pressed into the bag skin, and after the inner support ring is placed in the specified position, the negative pressure can be canceled to retract the bag skin. Compared with the prior art method of forcibly pushing the inner support ring into the inside of the bag skin and flipping and folding the bag skin, this embodiment can reduce the friction damage to the bag skin, inner support ring and other components during the installation of the inner support ring, and effectively improve the installation efficiency and installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0019] FIG1 shows a schematic structural diagram of a first embodiment of an air spring inner support ring installation tooling device according to the present application;

[0020] FIG2 shows a schematic structural diagram of a second embodiment of an air spring inner support ring installation tooling device according to the present application;

[0021] FIG3 shows a schematic structural diagram of a first embodiment of a negative pressure module according to the present application;

[0022] FIG4 shows a schematic structural diagram of a second embodiment of a negative pressure module according to the present application;

[0023] FIG5 shows a schematic structural diagram of an embodiment of a guide device according to the present application;

[0024] FIG6 shows a schematic structural diagram of a first embodiment of a sealing module according to the present application;

[0025] FIG7 shows a schematic structural diagram of a second embodiment of a sealing module according to the present application;

[0026] FIG8 shows a schematic structural diagram of a third embodiment of a sealing module according to the present application;

[0027] FIG9 shows a schematic structural diagram of an embodiment of an expansion module according to the present application;

[0028] FIG10 shows a schematic structural diagram of a third embodiment of an air spring inner support ring installation tooling device according to the present application;

[0029] FIG11 shows an enlarged schematic diagram of portion A in FIG10 ;

[0030] FIG12 is a schematic structural diagram of a fourth embodiment of an air spring inner support ring installation tooling device according to the present application;

[0031] FIG. 13 is an enlarged schematic diagram of portion B in FIG. 12 .

[0032] Among them, the above-mentioned drawings include the following figure marks: 1. Negative pressure module; 2. Expansion module; 3. Sealing module; 4. Guide device; 5. Bag skin; 6. Fastening screw; 7. Inner support ring; 10. Working chamber; 100. Air hole; 101. First air path interface; 102. Assembly hole; 11. Large diameter cavity; 12. Small diameter cavity; 21. Elastic airbag; 22. Upper plug; 23. Lower seat; 230. Second air path interface; 31. Annular body; 32. Annular boss structure; 33. Sealing ring; 34. Drive motor; 41. Guide seat; 42. Guide column. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0037] 1 to 13 , according to a specific embodiment of the present application, an air spring inner support ring installation tooling device is provided.

[0038] The air spring inner support ring installation tooling equipment includes a negative pressure module 1, an expansion module 2 and a sealing module 3. The negative pressure module 1 is provided with a working chamber 10. A plurality of air holes 100 and a first air path interface 101 are provided on the cavity wall of the working chamber 10. At least one air hole 100 is connected to the external ventilation device through the first air path interface 101; the expansion module 2 is arranged in the working chamber 10, and the expansion module 2 at least includes an elastic air bag 21 that can expand and contract in the radial direction. The outer peripheral surface of the elastic air bag 21 is used to cover the bag skin 5 of the air spring. The elastic air bag 21 expands in the radial direction of the negative pressure module 1, and can drive the bag skin 5 to expand in the radial direction to a preset tightening state; there are two sealing modules 3, and the two sealing modules 3 are respectively arranged in the negative pressure module 1, the sealing modules 3 are movably arranged relative to the negative pressure module 1 along the axial direction of the negative pressure module 1, and the two sealing modules 3 respectively have an initial position away from the negative pressure module 1 and a sealing position in contact with the negative pressure module 1; wherein, when the bladder skin 5 is in a preset tensioned state, the two sealing modules 3 can be moved from the initial position to the sealing position, so that at least part of the sealing module 3 extends to between the bladder skin 5 and the elastic airbag 21 to separate the bladder skin 5 from the elastic airbag 21; when the sealing module 3 is in the sealing position, a sealed space is formed between the sealing module 3, the bladder skin 5 and the cavity wall of the working chamber 10, and the sealed space forms a negative pressure space through the first air path interface 101, the air hole 100, and the external ventilation equipment, so that the bladder skin 5 maintains the preset tensioned state.

[0039] By applying the technical solution of this embodiment, when the elastic airbag 21 expands and drives the bag skin 5 to a preset tensioned state, the sealing module 3 can separate the bag skin 5 from the elastic airbag 21, and at the same time, a sealed space is formed between the sealing module 3, the bag skin 5 and the cavity wall of the working chamber 10. The sealed space forms a negative pressure space through the first air path interface 101, the air hole 100, and the external ventilation equipment, so that the bag skin 5 maintains the preset tensioned state. At this time, the inner support ring 7 can be pressed into the bag skin 5, and after the inner support ring 7 is placed in the specified position, the negative pressure is canceled to retract the bag skin 5. Compared with the prior art method of forcibly pushing the inner support ring 7 into the interior of the bag skin 5 and flipping the bag skin 5, this embodiment can reduce the friction damage to the bag skin 5, the inner support ring 7 and other components during the installation of the inner support ring 7, and effectively improve the installation efficiency and installation accuracy.

[0040] The air spring inner support ring installation tooling also includes a guide device 4, which includes at least two guide seats 41. A plurality of guide posts 42 are disposed between the two guide seats 41. The two guide seats 41 are respectively connected to the ends of the guide posts 42. The guide posts 42 extend along the axial direction of the negative pressure module 1 and are slidably connected to the sealing module 3. The provision of the guide device 4 ensures the coaxial relationship between the sealing module 3 and the negative pressure module 1 and the expansion module 2 during axial movement.

[0041] In an exemplary embodiment of the present application, the guide seat 41 is a circular ring structure, and a plurality of guide posts 42 are arranged at intervals along the circumference of the guide seat 41 .

[0042] In an exemplary embodiment of the present application, the relative position of the negative pressure module 1 and the guide device 4 can be adjusted by adjusting the fastening screws 6 on the negative pressure module 1, so as to more flexibly cope with the solutions of the inner support ring 7 in different positions.

[0043] Specifically, the negative pressure module 1 is provided with a plurality of axially extending assembly holes 102, with at least a portion of the guide posts 42 extending through the assembly holes 102. Two guide seats 41 are located at either end of the negative pressure module 1, with a sealing module 3 disposed between each guide seat 41 and the negative pressure module 1. This arrangement ensures that the sealing modules 3 at both ends maintain an axial relationship with the negative pressure module 1.

[0044] Furthermore, the air holes 100 on the negative pressure module 1 are arranged in a matrix. When the negative pressure module 1 is working, the internal matrix air path creates a negative pressure, adsorbing the inflated bladder skin 5 on the inner cavity. This arrangement allows for flexible and maneuverable suction and discharge of gas to create negative pressure.

[0045] Specifically, to ensure an ideal negative pressure effect, it is necessary to ensure that the distance L between adjacent pores 100 is less than 10 mm, and the diameter D1 of the pore 100 is between 1 and 3 mm, that is, L<10 mm, 1 mm≤D1≤3 mm.

[0046] Specifically, the working chamber 10 of the negative pressure module 1 includes a large-diameter chamber 11 and a small-diameter chamber 12 adjacent to each other in the axial direction. The diameter of the large-diameter chamber 11 is larger than the diameter of the small-diameter chamber 12, and a step surface is formed at the connection between the large-diameter chamber 11 and the small-diameter chamber 12 for mounting the inner support ring 7. To ensure effective positioning of the step surface, the inner diameter of the step surface should be 1 mm larger than the sum of the outer diameter of the inner support ring 7 and twice the thickness of the bladder skin 5. The thickness of the bladder skin 5 is H1, the outer diameter of the inner support ring 7 is D2, the diameter of the large-diameter chamber 11 is D3, and the diameter of the small-diameter chamber 12 is D4. Then, D4 ≥ D2 + 2 * H1 + 1, H1 + D2 / 2 ≤ D3 - D4, where the measurement units of H1, D2, D3, and D4 are all mm.

[0047] Furthermore, the sealing module 3 includes an annular body 31 having a plurality of through holes for the guide column 42 to pass through, and the annular body 31 is slidably arranged along the guide column 42; an annular boss structure 32 is provided on the inner circular edge of the annular body 31, and the annular boss structure 32 is provided at one end of the annular body 31 facing the negative pressure module 1, and the diameter of the annular boss structure 32 is gradually reduced in the direction away from the annular body 31; when the bladder skin 5 is in a preset tensioned state and the sealing module 3 moves from the initial position to the sealing position, the annular boss structure 32 extends along the axial movement to between the bladder skin 5 and the elastic airbag 21, separating the bladder skin 5 from the elastic airbag 21.

[0048] In an exemplary embodiment of the present application, the sealing module 3 further includes a driving motor 34 , and the output shaft of the driving motor 34 is driven by the annular body 31 through a transmission assembly, which may be a gear rack, a worm gear, or other structures.

[0049] Furthermore, an annular groove is formed on the annular body 31, which houses a sealing ring 33. When the sealing module 3 is in the sealing position, the sealing ring 33 abuts the end face of the negative pressure module 1. The sealing ring 33 can seal the sealed space formed by the annular body 31, the negative pressure module 1, and the bladder skin 5, ensuring that the negative pressure module 1 can effectively absorb the bladder skin 5.

[0050] Furthermore, the expansion module 2 includes an upper plug 22 and a lower seat 23. The upper plug 22 is connected to the first end of the elastic airbag 21 to block the first end of the elastic airbag 21; the lower seat 23 is connected to the second end of the elastic airbag 21 to block the second end of the elastic airbag 21. The lower seat 23 is provided with a second air path interface 230. The interior space of the elastic airbag 21 is connected to the external ventilation device through the second air path interface 230. The elastic airbag 21 is expanded by filling gas into the interior, thereby propping up the airbag skin 5 and making it adhere to the working chamber 10 of the negative pressure module 1.

[0051] The present application also provides a preferred embodiment of an air spring inner support ring installation tooling device.

[0052] Specifically, the air spring inner support ring installation tooling equipment includes a negative pressure module 1, an expansion module 2, a guide device 4 and two sealing modules 3, wherein the expansion module 2 includes an elastic airbag 21, an upper plug 22 and a lower seat 23. The elastic airbag 21, the upper plug 22 and the lower seat 23 constitute a sealed cavity. A second air path interface 230 is provided on the lower seat 23 to connect with the external air pipe. By filling gas into the sealed cavity, the elastic airbag 21 is expanded, and then the bag skin 5 is propped up, so that the bag skin 5 is attached to the inner cavity of the negative pressure module 1.

[0053] The negative pressure module 1 generates negative pressure through its internal matrix of air holes 100, adsorbing the expanded bladder skin 5 onto the inner cavity. The inner cavity of the negative pressure module 1 is designed with a stepped surface structure to position the inner support ring 7. To ensure the ideal negative pressure effect, the air holes 100 should be spaced less than 10mm apart, and the diameter of the air holes 100 should be 1-3mm. To ensure effective positioning of the stepped surface, the inner diameter of the stepped surface is controlled to be 1mm larger than the sum of the outer diameter of the inner support ring 7 and twice the thickness of the bladder skin 5. At the same time, the step thickness is controlled between the thickness of the bladder skin 5 and 1 / 2 the thickness of the inner support ring 7.

[0054] The guide device 4 ensures the coaxiality of the sealing modules 3 at both ends with the negative pressure module 1 and the expansion module 2 during axial movement. The relative position of the negative pressure module 1 and the guide device 4 can be adjusted by loosening the fastening screws 6 on the negative pressure module 1, providing more flexibility in adapting to different internal support ring positions.

[0055] The two sealing modules 3 are symmetrically arranged, and each sealing module 3 is composed of a drive motor 34, an annular body 31 and a sealing ring 33. The drive motor 34 is connected to the annular body 31, pushing the annular body 31 to move axially along the guide device 4. The inner ring edge of the annular body 31 has an annular boss structure 32, which is a wedge boss. The wedge boss is used to separate the elastic airbag 21 and the bag skin 5 on the fitted expansion module 2, and is inserted into the fitting gap between the elastic airbag 21 and the bag skin 5 through the axial movement of the wedge, thereby achieving separation. The sealing ring 33 is used to achieve sealing between the negative pressure module 1 and the sealing module 3, so that a closed cavity is formed between the negative pressure module 1 and the bag skin 5.

[0056] The use process of the air spring inner support ring installation tooling equipment in this embodiment is as follows: the bladder skin 5 is placed - the expansion module 2 is expanded - the sealing module 3 is cut in - the negative pressure module 1 is negatively pressurized - the expansion module 2 is deflated and withdrawn - the inner support ring 7 is placed - the sealing module 3 is cut out and the negative pressure module 1 is depressurized.

[0057] The specific operation steps are as follows: first, place the bladder skin 5 on the outside of the expansion module 2, and maintain a specific relative position relationship between the bladder skin 5 and the expansion module 2; by filling high-pressure gas into the expansion module 2, the elastic airbag 21 in the expansion module 2 is deformed and expands with the bladder skin 5. As shown in Figures 10 and 11, the sealing modules 3 at both ends move axially toward the negative pressure module 1 under the action of the driving motor 34, and the wedge on the edge of the annular body 31 is inserted into the gap between the bag skin 5 and the elastic airbag 21 through the sharp corner, thereby realizing the separation of the bag skin 5 and the elastic airbag 21. At the same time, the sealing ring 33 of the sealing module 3 contacts the negative pressure module 1 to form a sealed environment composed of two sealing modules 3, the negative pressure module 1 and the bag skin 5. At this time, the negative pressure module 1 starts to inhale, forming a negative pressure, and the expansion module 2 deflates. As shown in Figures 12 and 13, the elastic airbag 21 returns to its size before expansion, the bag skin 5 and the elastic airbag 21 are completely separated, and the expansion module 2 is withdrawn. At this time, the bag skin 5 can continue to maintain its expanded state by relying on the negative pressure on the negative pressure module 1, and the inner support ring 7 is placed in. The inner support ring 7 will fall on the step surface of the inner cavity of the negative pressure module 1. After placement, the sealing module 3 is cut out and the negative pressure module 1 is depressurized, the bladder skin 5 returns to its pre-expansion state, and the inner support ring 7 is placed into the designated position inside the bladder skin 5. It should be noted that the withdrawal of the expansion module 2 can be after the placement of the inner support ring 7.

[0058] The application of the air spring inner support ring installation tooling equipment in the above embodiment can realize the placement of large-diameter inner support ring 7 (the outer diameter of the inner support ring 7 is much larger than the inner diameter of the bladder skin 5), effectively improving the installation efficiency, without wear of components during the installation process, and with higher installation position accuracy.

[0059] The technical solution of this embodiment adopts the combination of the above-mentioned expansion module, negative pressure module, guide device, sealing module and corresponding process steps, thereby eliminating the traditional method of forcibly pushing the inner support ring to press it into the interior of the bladder skin and the method of flipping and folding the bladder skin, thereby improving the efficiency of installing the inner support ring of the air spring. At the same time, there is no friction damage during the installation process, and high-precision installation of the inner support ring position is achieved.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also fall within the scope of this application.

[0062] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0063] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An air spring inner support ring installation device, characterized in that: include: A negative pressure module (1), the negative pressure module (1) being provided with a working chamber (10), a plurality of air holes (100) and a first air path interface (101) being provided on a chamber wall of the working chamber (10), at least one of the air holes (100) being connected to an external ventilation device via the first air path interface (101); An expansion module (2), the expansion module (2) being arranged in the working chamber (10), the expansion module (2) comprising at least an elastic airbag (21) which can expand and contract in a radial direction, the outer peripheral surface of the elastic airbag (21) being used for sleeve-mounting a bag skin (5) of an air spring, the elastic airbag (21) expanding in a radial direction of the negative pressure module (1), and being able to drive the bag skin (5) to expand in a radial direction to a preset tensioned state; A sealing module (3), wherein there are two sealing modules (3), the two sealing modules (3) are respectively arranged at two ends of the negative pressure module (1), the sealing module (3) is movably arranged relative to the negative pressure module (1) along the axial direction of the negative pressure module (1), and the two sealing modules (3) respectively have an initial position away from the negative pressure module (1) and a sealing position in contact with the negative pressure module (1); Wherein, when the bladder skin (5) is in the preset tensioned state, the two sealing modules (3) can move from the initial position to the sealing position, so that at least part of the sealing module (3) extends between the bladder skin (5) and the elastic airbag (21), so as to separate the bladder skin (5) from the elastic airbag (21); When the sealing module (3) is in the sealing position, a sealed space is formed between the sealing module (3), the bladder skin (5) and the cavity wall of the working cavity (10), and the sealed space forms a negative pressure space through the first air path interface (101), the air hole (100) and the external ventilation equipment, so that the bladder skin (5) maintains the preset tension state.

2. The air spring inner support ring installation device according to claim 1, characterized in that: The air spring inner support ring installation device further comprises a guide device (4), wherein the guide device (4) comprises: A guide seat (41), wherein there are at least two guide seats (41), a plurality of guide columns (42) are arranged between the two guide seats (41), the two guide seats (41) are respectively connected to the two ends of the guide column (42), the guide column (42) is extended along the axial direction of the negative pressure module (1), and the sealing module (3) is slidably connected to the guide column (42).

3. The air spring inner support ring installation device according to claim 2, characterized in that: The negative pressure module (1) is provided with a plurality of axially through-going assembly holes (102), at least part of the guide columns (42) are inserted into the assembly holes (102), the two guide seats (41) are respectively located at two ends of the negative pressure module (1), and a sealing module (3) is arranged between each guide seat (41) and the negative pressure module (1).

4. The air spring inner support ring installation device according to claim 1, characterized in that: The plurality of air holes (100) are arranged in a matrix.

5. The air spring inner support ring installation device according to claim 1, characterized in that: The diameter of the pores (100) is D1, and the distance between adjacent pores (100) is L, wherein 1 mm≤D1≤3 mm, and L<10 mm.

6. The air spring inner support ring installation device according to claim 1, characterized in that: The working chamber (10) comprises a large-diameter chamber (11) and a small-diameter chamber (12) adjacent to each other in the axial direction, the diameter of the large-diameter chamber (11) being larger than the diameter of the small-diameter chamber (12), and a step surface for mounting an inner support ring (7) is formed at the connection between the large-diameter chamber (11) and the small-diameter chamber (12).

7. The air spring inner support ring installation device according to claim 6, characterized in that: The thickness of the bladder skin (5) is H1, the outer diameter of the inner support ring is D2, the diameter of the large-diameter cavity (11) is D3, and the diameter of the small-diameter cavity (12) is D4, wherein D4≥D2+2*H1+1, H1+D2 / 2≤D3-D4, and the measurement units of H1, D2, D3, and D4 are all mm.

8. The air spring inner support ring installation device according to claim 2, characterized in that: The sealing module (3) comprises: An annular body (31), wherein a plurality of through holes are formed on the annular body (31) for the guide column (42) to pass through, and the annular body (31) is slidably arranged along the guide column (42); An annular boss structure (32) is arranged along the inner circular edge of the annular body (31), the annular boss structure (32) protrudes from one end of the annular body (31) facing the negative pressure module (1), and the diameter of the annular boss structure (32) is arranged to gradually decrease in a direction away from the annular body (31); When the bladder skin (5) is in the preset tensioned state and the sealing module (3) moves from the initial position to the sealing position, the annular boss structure (32) extends between the bladder skin (5) and the elastic airbag (21) to separate the bladder skin (5) from the elastic airbag (21).

9. The air spring inner support ring installation device according to claim 8, characterized in that: The annular body (31) is also provided with an annular groove, in which a sealing ring (33) is arranged. When the sealing module (3) is in the sealing position, the sealing ring (33) abuts against the end surface of the negative pressure module (1).

10. The air spring inner support ring installation device according to claim 1, characterized in that: The expansion module (2) further comprises: an upper plug (22), the upper plug (22) being connected to the first end of the elastic airbag (21) so as to block the first end of the elastic airbag (21); A lower seat (23), wherein the lower seat (23) is connected to the second end of the elastic airbag (21) to block the second end of the elastic airbag (21); a second air path interface (230) is provided on the lower seat (23); and the internal space of the elastic airbag (21) is connected to the external ventilation device via the second air path interface (230).

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