Air spring posture holding tool and control method

Abstract

The present application relates to the technical field of vehicle parts, and particularly relates to an air spring posture holding tool and a control method, the structure of the air spring posture holding tool comprises a base; a quick-change positioning assembly which is detachably installed at the middle part of the base, the top part of the quick-change positioning assembly is provided with a conical positioning surface, and the bottom part of the air spring is clamped on the conical positioning surface; two clamping claws which are movably arranged at the two sides of the quick-change positioning assembly, the two clamping claws can clasp the air spring along the radial direction; a sliding table cylinder assembly which is installed at the bottom part of the clamping claw, the sliding table cylinder assembly can move up and down along with the clamping claw when power is off; and a guide rod cylinder assembly which is installed at the bottom part of the sliding table cylinder assembly, the guide rod cylinder assembly can be locked at the current position when power is off. The air spring posture holding tool and the control method can solve the problems of poor universality of the existing assembly tool and easy deviation and damage of the air spring.

Description

Technical Field

[0001] This application relates to the field of vehicle component technology, and in particular to an air spring attitude holding fixture and control method. Background Technology

[0002] Air suspension is widely used in passenger vehicles. As a core component, the assembly posture of the vertical air spring directly affects the accuracy of the vehicle height calibration, ride comfort, and service life of the air spring. During the vehicle prototyping stage, due to the changing state of prototype vehicles, frequent model changes, and non-fixed assembly stations, traditional tooling is difficult to meet the actual needs of flexible use, rapid model changeover, and repeated disassembly and assembly debugging on the prototyping site.

[0003] Existing assembly tooling has significant shortcomings in prototyping scenarios. Its versatility is poor; a single tooling unit can only be adapted to air springs for a specific vehicle model. When prototyping multiple vehicle models on mixed lines, tooling investment is high and switchover efficiency is low. Furthermore, existing assembly tooling is generally a rigid, static clamping structure. During inflation, the air spring's airbag expands, easily leading to problems such as posture shift, lateral tilting, and scratches on the airbag surface. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide an air spring attitude holding fixture and control method to solve the problems of poor versatility of existing assembly fixtures and the easy displacement and damage of air springs.

[0005] According to a first aspect of the present invention, an air spring attitude holding fixture is provided, wherein the air spring attitude holding fixture includes: a base; a quick-change positioning assembly detachably mounted in the middle of the base, the top of the quick-change positioning assembly being provided with a conical positioning surface, and the bottom of the air spring being engaged with the conical positioning surface; two clamping claws movably disposed on both sides of the quick-change positioning assembly, the two clamping claws being capable of radially clamping the air spring; a slide cylinder assembly mounted on the bottom of the clamping claws, the slide cylinder assembly being capable of driving the clamping claws to move up and down when energized, and the slide cylinder assembly being capable of moving up and down with the clamping claws when de-energized; and a guide rod cylinder assembly mounted on the bottom of the slide cylinder assembly, the guide rod cylinder assembly being capable of driving the slide cylinder assembly to move in the horizontal direction when energized, and the guide rod cylinder assembly being capable of locking in the current position when de-energized.

[0006] Preferably, the air spring attitude holding fixture further includes a guide limit cover, which is installed on the top of the air spring. The guide limit cover includes: a positioning part, which is engaged on the top of the air spring; a limiting part, which is disposed above the positioning part, and a gap is provided between the limiting part and the positioning part, and the top of the limiting part is tapered; and an elastic element, which is disposed within the gap.

[0007] Preferably, the two guide rod cylinder assemblies are respectively disposed on both sides of the quick-change positioning assembly. Each guide rod cylinder assembly includes: a guide rod portion arranged radially along the air spring and fixed to the top of the base; a movable cylinder body installed on the guide rod portion and moving along the guide rod portion; and a center-sealed solenoid valve connected to the movable cylinder body. When the left coil of the center-sealed solenoid valve is energized, the movable cylinder body moves towards the air spring; when the right coil of the center-sealed solenoid valve is energized, the movable cylinder body moves away from the air spring; and when the center-sealed solenoid valve is de-energized, the movable cylinder body is locked in its current position.

[0008] Preferably, the slide cylinder assembly includes: a cylinder body mounted on the top of the movable cylinder, the cylinder body moving horizontally with the movable cylinder; a lifting slide connected to the cylinder body via a piston rod, the clamping claw fixed to the top of the lifting slide; and a central venting solenoid valve connected to the cylinder body, wherein when the left coil of the central venting solenoid valve is energized, the piston rod of the cylinder body extends; when the right coil of the central venting solenoid valve is energized, the piston rod of the cylinder body retracts; and when the central venting solenoid valve is de-energized, the piston rod of the cylinder body moves up and down with the clamping claw.

[0009] Preferably, the base includes: a base body with casters at the bottom; an air compressor installed on the base body, the air compressor being connected to the slide cylinder assembly and the guide rod cylinder assembly; a quick-connect air supply connector integrated on the base body, the quick-connect air supply connector being able to connect to an external air source, the quick-connect air supply connector being connected to the slide cylinder assembly and the guide rod cylinder assembly; an electronic control unit installed on the base body, the electronic control unit being provided with a mobile power supply, the electronic control unit being electrically connected to the slide cylinder assembly and the guide rod cylinder assembly to control the energization of the center-sealed solenoid valve and the center-leaking solenoid valve; and a power interface located on the electronic control unit, the power interface being able to connect to an external power source.

[0010] Preferably, the quick-change positioning assembly includes: a plurality of support plates of different sizes, one of which is detachably mounted on the middle of the base; and a plurality of conical sleeves, wherein a conical positioning surface is formed on the top of the conical sleeves, the plurality of conical sleeves of different sizes, one of which is detachably mounted on the top of the support plate.

[0011] Preferably, the side of the clamping claw facing the air spring is formed as an arc surface, a flexible buffer layer is provided on the arc surface, and an annular boss portion protruding radially is provided on the outer periphery of the air spring, with the two clamping claws clamped and fixed below the annular boss portion.

[0012] Preferably, the air spring has an opening at its top, the bottom end of the positioning part is engaged in the opening, the elastic element is a spring, the top end of the positioning part has a first spring groove, the bottom end of the limiting part has a second spring groove, and the elastic element is engaged and fixed between the first spring groove and the second spring groove.

[0013] According to a second aspect of the present invention, a control method for an air spring attitude holding fixture is provided, wherein the air spring attitude holding fixture is an air spring attitude holding fixture as described above, and the control method for the air spring attitude holding fixture includes: moving the base to the assembly position of the prototype vehicle; mounting the air spring above the quick-change positioning assembly; mounting the guide limit cover above the air spring to achieve alignment between the air spring and the vehicle body or frame; fixing the base and setting the opening and closing range and lifting stroke of the clamping claw; controlling the slide cylinder assembly to drive the clamping claw to rise to a preset height; and controlling the guide rod. The cylinder assembly drives the clamping claw to feed radially to clamp the air spring; the slide cylinder assembly and the guide rod cylinder assembly are de-energized, and the guide rod cylinder assembly is locked in its current position, so that the clamping claw continues to clamp the air spring, and the slide cylinder assembly moves up and down with the clamping claw; inflation is started, so that gas enters the air spring, and the clamping claw rises with the air spring. After inflation reaches the preset pressure, pressure holding and leak detection and height calibration are performed, and assembly data is recorded; the air spring is depressurized, and the slide cylinder assembly and the guide rod cylinder assembly are reset, moving the base to the assembly position of the next prototype vehicle.

[0014] Preferably, when it is necessary to replace the prototype vehicle or the air spring, the quick-change positioning component is replaced according to the specifications of the air spring of the current prototype vehicle, and the opening and closing range and lifting stroke of the clamping claw are adjusted.

[0015] The air spring attitude holding fixture and control method of this invention includes a quick-change positioning component detachably mounted in the middle of a base. The top of the quick-change positioning component has a conical positioning surface, and the bottom of the air spring is engaged with this surface, thus achieving initial positioning. Two clamping claws are movably mounted on both sides of the quick-change positioning component, capable of radially clamping the air spring for further positioning and preventing displacement. A slide cylinder assembly is mounted at the bottom of the clamping claws, driving them to move up and down when energized. A guide rod cylinder assembly is mounted at the bottom of the slide cylinder assembly, driving it to move horizontally when energized. This configuration allows for adjustment of the clamping claw position to accommodate air springs of different sizes, and the quick-change positioning component can be adaptively replaced according to the air spring's dimensions, thereby improving the versatility of the air spring attitude holding fixture. Furthermore, the guide rod cylinder assembly can lock in its current position when power is off, allowing the clamping claw to continuously hold the air spring. The slide cylinder assembly can also move up and down with the clamping claw when power is off, thus achieving claw-driven movement. This ensures that as the airbag inflates and lifts the air spring, the clamping claw dynamically aligns the air spring and prevents scratches between the clamping claw and the airbag. This effectively solves the problems of poor versatility in existing assembly tooling and the susceptibility of air springs to misalignment and damage.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the air spring attitude holding fixture according to the present invention.

[0019] Figure 2 This is a schematic diagram of a portion of the structure of the air spring attitude holding fixture according to the present invention.

[0020] Figure 3 This is a schematic diagram of the air circuit of the slide cylinder assembly of the air spring attitude holding fixture according to the present invention.

[0021] Figure 4This is a schematic diagram of the air circuit of the guide rod cylinder assembly of the air spring attitude holding fixture according to the present invention.

[0022] Reference numerals: 1-Base; 10-Base body; 11-Electrical control unit; 110-Control button; 12-Power interface; 13-Cast; 2-Quick-change positioning assembly; 21-Support plate; 22-Conical sleeve; 3-Clamping claw; 4-Slide cylinder assembly; 41-Cylinder body; 42-Lifting slide; 43-Middle-leakage solenoid valve; 5-Guide rod cylinder assembly; 51-Guide rod part; 52-Moving cylinder body; 53-Middle-sealing solenoid valve; 6-Guide limit cover; 61-Positioning part; 62-Limiting part; 63-Elastic element; 7-Air spring; 70-Annular boss part; 71-Conical limiting surface. Detailed Implementation

[0023] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0024] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0025] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0026] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0027] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0028] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0029] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0030] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0031] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0032] like Figures 1 to 4As shown, according to a first aspect of the present invention, an air spring attitude holding fixture is provided, the air spring attitude holding fixture including a base 1, a quick-change positioning assembly 2, a clamping claw 3, a slide cylinder assembly 4, and a guide rod cylinder assembly 5.

[0033] In the following description, reference will be made to Figures 1 to 4 The specific structure of the aforementioned components of the air spring attitude-maintaining fixture and the connection relationship of the aforementioned components are described in detail.

[0034] like Figures 1 to 4 As shown, in this embodiment, the quick-change positioning assembly 2 is detachably installed in the middle of the base 1. The top of the quick-change positioning assembly 2 is provided with a conical positioning surface, and the bottom of the air spring 7 is engaged with the conical positioning surface, thereby achieving initial positioning. Two clamping claws 3 are movably arranged on both sides of the quick-change positioning assembly 2. The two clamping claws 3 can radially clamp the air spring 7, thereby achieving further positioning and preventing the air spring 7 from shifting. A slide cylinder assembly 4 is installed at the bottom of the clamping claws 3. When energized, the slide cylinder assembly 4 can drive the clamping claws 3 to move up and down. A guide rod cylinder assembly 5 is installed at the bottom of the slide cylinder assembly 4. When energized, the guide rod cylinder assembly 5 can drive the slide cylinder assembly 4 to move horizontally. This arrangement allows the position of the clamping claws 3 to be adjusted to accommodate air springs 7 of different sizes. The quick-change positioning assembly 2 can be adaptively replaced according to the size of the air spring 7, thereby improving the versatility of the air spring attitude maintenance fixture. Furthermore, the guide rod cylinder assembly 5 can lock in its current position when power is off, allowing the clamping claw 3 to continuously clamp the air spring 7. The slide cylinder assembly 4 can move up and down with the clamping claw 3 when power is off, thus achieving dynamic alignment of the clamping claw 3. This ensures that as the airbag inflates and drives the air spring 7 to rise, the clamping claw 3 can dynamically align the air spring 7 and avoids scratching between the clamping claw 3 and the airbag, which could cause damage to the airbag.

[0035] Preferred, such as Figure 1 and Figure 2As shown, in this embodiment, the base 1 can be a rigid frame structure, and the quick-change positioning assembly 2 is detachably installed in the center of the base 1 to be adaptively adjusted according to the size of the air spring 7. Specifically, the quick-change positioning assembly 2 can include a support plate 21 and a conical sleeve 22. Multiple support plates 21 and conical sleeves 22 are used. The support plate 21 is a disc-shaped component that is bolted to the top of the base 1. The multiple support plates 21 have different sizes, and the operator can select one of the support plates 21 to install in the center of the base 1 according to the diameter of the air spring 7. A conical positioning surface is formed on the top of the conical sleeve 22. Since the multiple conical sleeves 22 have different sizes, the dimensions of the conical positioning surfaces of different conical sleeves 22 are also different. A cylindrical or conical through hole is formed at the bottom of the air spring 7, allowing the bottom of the air spring 7 to be precisely engaged with the top of one of the conical sleeves 22. The operator can select one of the support plates 21 to install in the center of the base 1 according to the diameter of the through hole at the bottom of the air spring 7.

[0036] Preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the clamping claws 3 are movably disposed on opposite sides of the quick-change positioning assembly 2 to clamp the air spring 7 and prevent the air spring 7 from tipping over or tilting during inflation. The side of the clamping claws 3 facing the air spring 7 is formed as an arc surface, and a flexible buffer layer is provided on the arc surface to increase friction and prevent scratching the air bladder of the air spring 7. Specifically, the flexible buffer layer can be a polyurethane flexible buffer layer. The outer periphery of the air spring 7 is provided with a radially protruding annular boss 70, and the two clamping claws 3 can be clamped and fixed below the annular boss 70.

[0037] Preferred, such as Figure 1 and Figure 2As shown, in this embodiment, the air spring attitude holding fixture may further include a guide limiting cover 6. The guide limiting cover 6 is installed on the top of the air spring 7 to guide and limit the height of the air spring 7 from the top, preventing the air spring 7 from tipping over or tilting during inflation. The guide limiting cover 6 includes a positioning part 61, a limiting part 62, and an elastic element 63. The positioning part 61 is engaged at the top of the air spring 7. The limiting part 62 is positioned above the positioning part 61, and a gap is provided between the limiting part 62 and the positioning part 61. The elastic element 63 is disposed within the gap, allowing the limiting part 62 and the positioning part 61 to move relative to each other. The top of the limiting part 62 is tapered to cooperate with the annular structure of the prototype vehicle body. During the inflation of the air spring 7, the guide limiting cover 6 continuously rises until the limiting part 62 is engaged in the annular structure of the vehicle body, at which point the guide limiting cover 6 provides guidance for the air spring 7. When the elastic element 63 is compressed to the point where the limiting part 62 contacts the positioning part 61, the guide limiting cover 6 can limit the air spring 7 in the vertical direction.

[0038] Furthermore, preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the air spring 7 has an opening at its top, and the bottom end of the positioning part 61 is engaged within the opening. Specifically, a conical limiting surface 71 can be provided within the opening at the top of the air spring 7, and the bottom end of the positioning part 61 can be formed into a cone shape, so that the bottom end of the positioning part 61 can be engaged within the conical limiting surface 71. The elastic element 63 can be a spring, and a first spring groove is provided at the top end of the positioning part 61, and a second spring groove is provided at the bottom end of the limiting part 62. The elastic element 63 is engaged and fixed between the first spring groove and the second spring groove.

[0039] Preferred, such as Figure 1 , Figure 2 and Figure 1As shown, in this embodiment, two guide rod cylinder assemblies 5 are respectively disposed on both sides of the quick-change positioning assembly 2. Each guide rod cylinder assembly 5 includes a guide rod portion 51, a movable cylinder body 52, and a center-sealed solenoid valve 53. The guide rod portion 51 is arranged radially along the air spring 7, and its end is fixed to the top of the base 1 by bolts. The movable cylinder body 52 is mounted on the guide rod portion 51 and can move along it. The center-sealed solenoid valve 53 is connected to the movable cylinder body 52, and can specifically be a three-position five-way center-sealed solenoid valve. When the left coil of the center-sealed solenoid valve 53 is energized, the movable cylinder body 52 moves towards the air spring 7; when the right coil of the center-sealed solenoid valve 53 is energized, the movable cylinder body 52 moves away from the air spring 7; when the center-sealed solenoid valve 53 is de-energized, the movable cylinder body 52 is locked in its current position, thereby adjusting the horizontal position of the clamping claw 3.

[0040] Preferred, such as Figure 2 As shown, in this embodiment, there are two slide cylinder assemblies 4, each mounted on a separate movable cylinder 52. Specifically, each slide cylinder assembly 4 includes a cylinder body 41 and a lifting slide 42. The bottom of the cylinder body 41 is bolted to the top of the movable cylinder 52, allowing the cylinder body 41 to move horizontally with the movable cylinder 52. The lifting slide 42 is connected to the cylinder body 41 via a piston rod extending from the top of the lifting slide 42, and a clamping claw 3 is fixed to the top of the lifting slide 42. A center-leaking solenoid valve 43 is connected to the cylinder body 41; this center-leaking solenoid valve 43 can be a three-position five-way center-leaking solenoid valve. When the left coil of the central leakage solenoid valve 43 is energized, the piston rod of the cylinder body 41 extends to drive the clamping claw 3 to rise; when the right coil of the central leakage solenoid valve 43 is energized, the piston rod of the cylinder body 41 retracts to drive the clamping claw 3 to descend; when the central leakage solenoid valve 43 is de-energized, the piston rod of the cylinder body 41 can move up and down with the clamping claw 3 to allow the clamping claw 3 to float with the air spring 7.

[0041] Further optimized, such as Figure 4As shown, in this embodiment, the base 1 includes a base body 10, an air compressor, a quick-connect air supply connector, an electronic control unit 11, and a power interface 12. The quick-change positioning assembly 2, the slide cylinder assembly 4, and the guide rod cylinder assembly 5 are mounted on the base body 10. Casters 13 are provided at the bottom of the base body 10 to facilitate the movement of the tooling held in position by the air spring. The casters 13 may have a locking structure to easily fix the position of the base 1. The air compressor is bolted to the base body 10 and is connected to the slide cylinder assembly 4 and the guide rod cylinder assembly 5. The quick-connect air supply connector is integrated into the base body 10 and can be connected to an external air source. The quick-connect air supply connector is connected to the slide cylinder assembly 4 and the guide rod cylinder assembly 5, and at least one of the air compressor and the quick-connect air supply connector supplies air to the slide cylinder assembly 4 and the guide rod cylinder assembly 5 to drive the gripping claw 3 to move. The electronic control unit 11 is bolted to the base body 10. The electronic control unit 11 is equipped with a portable power source and is electrically connected to the slide cylinder assembly 4 and the guide rod cylinder assembly 5 to control the energization of the center-sealed solenoid valve 53 and the center-leaking solenoid valve 43 (i.e., to control the energization or de-energization of the coils) and to supply power to the slide cylinder assembly 4 and the guide rod cylinder assembly 5. The electronic control unit 11 may also be equipped with a power interface 12, which can be connected to an external power source, allowing the electronic control unit 11 to be powered by an external power source when the portable power source is unavailable. The electronic control unit 11 may be equipped with a control button 110 to control the energization of the coils of the center-sealed solenoid valve 53 and the center-leaking solenoid valve 43, thereby controlling the movement of the clamping claw 3.

[0042] In addition, such as Figures 1 to 3 Figures 1 to 4 Figures 1 to 4As shown, according to a second aspect of the present invention, a control method for an air spring attitude holding fixture is provided. The air spring attitude holding fixture is as described above. The control method for the air spring attitude holding fixture includes: moving a base 1 to the assembly position of a prototype vehicle; installing an air spring 7 above a quick-change positioning assembly 2; installing a guide limit cover 6 above the air spring 7 to achieve alignment between the air spring 7 and the vehicle body or frame; fixing the base 1 and setting the opening and closing range and lifting stroke of the clamping claw 3; controlling the slide cylinder assembly 4 to drive the clamping claw 3 to rise to a preset height; and controlling the guide limit cover 6 to rise to a preset height. The lever cylinder assembly 5 drives the clamping claw 3 to feed radially to clamp the air spring 7; the slide cylinder assembly 4 and the guide rod cylinder assembly 5 are de-energized, and the guide rod cylinder assembly 5 is locked in the current position, so that the clamping claw 3 continues to clamp the air spring 7, and the slide cylinder assembly 4 moves up and down with the clamping claw 3; inflation is started, so that gas enters the air spring 7, and the clamping claw 3 rises with the air spring 7. After inflation to the preset pressure, pressure holding and leak detection and height calibration are performed, and the assembly data is recorded; the air spring 7 is depressurized, and the slide cylinder assembly 4 and the guide rod cylinder assembly 5 are reset, and the base 1 is moved to the assembly position of the next prototype vehicle.

[0043] Specifically, in this embodiment, the operator can move the base 1 to the assembly position of the prototype vehicle using the casters, then install the air spring 7 above the quick-change positioning assembly 2, and install the guide limit cover 6 above the air spring 7 to achieve alignment between the air spring 7 and the vehicle body or frame, completing the radial and circumferential positioning for assembly. After positioning, the casters 13 can be locked using the locking structure to fix the position of the base 1, and the opening and closing range and lifting stroke of the clamping claw 3 can be set. Then, the operator can use the control button 110 on the electronic control unit 11 to control the slide cylinder assembly 4 to drive the clamping claw 3 to rise to a preset height, and control the guide rod cylinder assembly 5 to drive the clamping claw 3 to feed radially, so that the clamping claw 3 clamps the air spring 7.

[0044] Then, the operator can control the de-energization of the center-sealed solenoid valve 53 of the slide cylinder assembly 4 and the center-leaking solenoid valve 43 of the guide rod cylinder assembly 5 via the electronic control unit 11. This locks the guide rod cylinder assembly 5 in its current position, allowing the clamping claw 3 to continuously clamp the air spring 7. The slide cylinder assembly 4 moves up and down with the clamping claw 3, thereby achieving the purpose of making the clamping claw 3 move accordingly.

[0045] Then, the operator can start inflation, allowing gas to enter the air spring 7. The air bladder of the air spring 7 inflates, causing the air spring 7 to rise, while the clamping claw 3 rises synchronously with the air spring 7 to maintain the air bladder's upright posture and radial restraint throughout the process. After inflation to the preset pressure, the operator can perform pressure holding and leak detection, simultaneously completing the air suspension height calibration and recording the assembly data.

[0046] Finally, the operator disconnects the air spring 7 from the inflation component, depressurizes the air spring 7, and controls the slide cylinder assembly 4 and guide rod cylinder assembly 5 to reset. Thus, after completing the trial assembly of the air spring 7, the base 1 can be moved to the assembly position of the next prototype vehicle for the next round of trial assembly.

[0047] Furthermore, preferably, in the embodiment, when it is necessary to replace the prototype vehicle or the air spring 7, the operator should replace the quick-change positioning component 2 according to the specifications of the air spring 7 of the current prototype vehicle, so as to ensure that the support plate 21 and the conical sleeve 22 are compatible with the size of the air spring 7, and to adjust the opening and closing range and lifting stroke of the clamping claw 3 accordingly.

[0048] During use, the quick-change positioning assembly 2, the clamping claw 3, and the guide limit cover 6 can provide all-around alignment for the air spring 7 from the top, middle, and bottom, preventing the air spring 7 from tipping over or tilting during inflation. When energized, the slide cylinder assembly 4 drives the clamping claw 3 to move up and down, and the guide rod cylinder assembly 5 drives the slide cylinder assembly 4 to move horizontally. This allows for adjustment of the clamping claw 3 to accommodate air springs 7 of different sizes. The quick-change positioning assembly 2 can be adapted to the size of the air spring 7, thus improving the versatility of the air spring posture maintenance fixture. Furthermore, when de-energized, the guide rod cylinder assembly 5 locks in its current position, ensuring the clamping claw 3 continuously clamps the air spring 7. When de-energized, the slide cylinder assembly 4 moves up and down with the clamping claw 3, thus achieving automatic alignment of the clamping claw 3. This ensures that during the process of the airbag inflating and causing the air spring 7 to rise, the clamping claw 3 can dynamically straighten the air spring 7 and avoid scratching between the clamping claw 3 and the airbag, which would cause the airbag to be scratched.

[0049] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air spring attitude holding fixture, characterized in that, The air spring attitude holding fixture includes: Base; A quick-change positioning assembly is detachably installed in the middle of the base. The top of the quick-change positioning assembly is provided with a conical positioning surface, and the bottom of the air spring is engaged with the conical positioning surface. Two clamping claws are movably disposed on both sides of the quick-change positioning assembly, and the two clamping claws are capable of clamping the air spring radially; A slide cylinder assembly is installed at the bottom of the clamping claw. When energized, the slide cylinder assembly drives the clamping claw to move up and down; when de-energized, the slide cylinder assembly moves up and down along with the clamping claw. A guide rod cylinder assembly is installed at the bottom of the slide cylinder assembly. When the guide rod cylinder assembly is powered on, it can drive the slide cylinder assembly to move in the horizontal direction. When the power is off, the guide rod cylinder assembly can be locked in the current position.

2. The air spring attitude holding fixture according to claim 1, characterized in that, The air spring attitude holding fixture also includes a guide limit cover, which is installed on the top of the air spring. The guide limit cover includes: The positioning part is engaged at the top of the air spring; A limiting part is disposed above the positioning part, a gap is provided between the limiting part and the positioning part, and the top of the limiting part is tapered; and An elastic element is disposed within the gap.

3. The air spring attitude holding fixture according to claim 2, characterized in that, The two guide rod cylinder assemblies are respectively disposed on both sides of the quick-change positioning assembly, and the guide rod cylinder assembly includes: A guide rod is arranged radially along the air spring and is fixed to the top of the base; A movable cylinder body is mounted on the guide rod portion, and the movable cylinder body moves along the guide rod portion; and A center-sealed solenoid valve is connected to the movable cylinder. When the left coil of the center-sealed solenoid valve is energized, the movable cylinder moves towards the air spring; when the right coil of the center-sealed solenoid valve is energized, the movable cylinder moves away from the air spring; when the center-sealed solenoid valve is de-energized, the movable cylinder is locked in its current position.

4. The air spring attitude holding fixture according to claim 3, characterized in that, The slide cylinder assembly includes: The cylinder body is mounted on the top of the movable cylinder body, and the cylinder body moves horizontally with the movable cylinder body; A lifting slide is connected to the cylinder body via a piston rod, and the clamping claw is fixed to the top of the lifting slide; and A central leakage solenoid valve is connected to the cylinder body. When the left coil of the central leakage solenoid valve is energized, the piston rod of the cylinder body extends; when the right coil of the central leakage solenoid valve is energized, the piston rod of the cylinder body retracts; when the central leakage solenoid valve is de-energized, the piston rod of the cylinder body moves up and down with the clamping claw.

5. The air spring attitude holding fixture according to claim 4, characterized in that, The base includes: The base body is equipped with casters at the bottom; An air compressor is installed on the base body, and the air compressor is connected to the slide cylinder assembly and the guide rod cylinder assembly; A quick-connect air supply connector is integrated into the base body. The quick-connect air supply connector can be connected to an external air source. The quick-connect air supply connector is connected to the slide cylinder assembly and the guide rod cylinder assembly. An electronic control unit, installed on the base body, is equipped with a mobile power supply. The electronic control unit is electrically connected to the slide cylinder assembly and the guide rod cylinder assembly to control the energization of the center-sealed solenoid valve and the center-leaking solenoid valve; and A power interface is provided in the electronic control unit, and the power interface can be connected to an external power source.

6. The air spring attitude holding fixture according to claim 2, characterized in that, The quick-change positioning component includes: Multiple support plates, the multiple support plates being of different sizes, one of the support plates being detachably mounted to the center of the base; and Multiple conical sleeves, wherein a conical positioning surface is formed on the top of the conical sleeves, the multiple conical sleeves having different sizes, and one of the conical sleeves being detachably mounted on the top of the support plate.

7. The air spring attitude holding fixture according to claim 2, characterized in that, The side of the clamping claw facing the air spring is formed as an arc surface, and a flexible buffer layer is provided on the arc surface. The outer periphery of the air spring is provided with a radially protruding annular boss, and the two clamping claws are clamped and fixed below the annular boss.

8. The air spring attitude holding fixture according to claim 2, characterized in that, The air spring has an opening at its top, the bottom end of the positioning part is engaged in the opening, the elastic element is a spring, the top end of the positioning part has a first spring groove, the bottom end of the limiting part has a second spring groove, and the elastic element is engaged and fixed between the first spring groove and the second spring groove.

9. A control method for an air spring attitude holding fixture, characterized in that, The air spring attitude holding fixture is the air spring attitude holding fixture according to any one of claims 2 to 8, and the control method of the air spring attitude holding fixture includes: Move the base to the assembly position of the prototype vehicle, install the air spring above the quick-change positioning assembly, and install the guide limit cover above the air spring to achieve alignment between the air spring and the vehicle body or frame; Fix the base and set the opening and closing range and lifting stroke of the clamping claw; The slide cylinder assembly is controlled to drive the clamping claw to rise to a preset height, and the guide rod cylinder assembly is controlled to drive the clamping claw to feed radially to clamp the air spring; The slide cylinder assembly and the guide rod cylinder assembly are de-energized, the guide rod cylinder assembly is locked in the current position, the clamping claw continues to clamp the air spring, and the slide cylinder assembly moves up and down with the clamping claw; Inflate the air spring by starting the inflation process, and the clamping claws will rise with the air spring. After inflation to the preset pressure, perform pressure holding and leak detection and height calibration, and record the assembly data. The air spring is depressurized, and the slide cylinder assembly and the guide rod cylinder assembly are reset to move the base to the assembly position of the next prototype vehicle.

10. The control method for the air spring attitude holding fixture according to claim 9, characterized in that, When it is necessary to replace the prototype vehicle or the air spring, replace the quick-change positioning component according to the specifications of the air spring of the current prototype vehicle, and adjust the opening and closing range and lifting stroke of the clamping claw.

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