Full-automatic air bag compression device and working method thereof

Abstract

The invention discloses a full-automatic air bag compression device and a working method thereof.The device comprises a top limiting plate, a bottom supporting plate, a jacking device, an inflation device and a pressure relief device, the top limiting plate and the bottom supporting plate are oppositely arranged up and down, and the jacking device is in transmission connection with the bottom supporting plate; the air bag assembly is placed between the top limiting plate and the bottom supporting plate, the air inflation device and the pressure relief device are both connected with the air bag assembly, the air inflation device is used for inflating the air bag assembly, and the pressure relief device is used for relieving pressure of the air bag assembly. The full-automatic air bag compression device is used for carrying out air bag compression on the air bag assembly, the operation defects caused by vehicle assembly are avoided, meanwhile, full-automatic and standardized operation can be achieved, the operation difference is reduced, and the labor cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of airbag assembly, and in particular to a full-automatic airbag compression device and a working method thereof. Background Art

[0002] In the vehicle's air suspension system, the airbag assembly is one of the key components. The airbag assembly includes an upper airbag seat, a lower airbag seat and an airbag body. The airbag assembly is arranged between the tire and the axle, and mainly plays a role of cushioning and supporting.

[0003] The existing airbag assembly needs to be assembled on the vehicle. The so-called on-vehicle assembly is to first assemble the uncompressed airbag assembly to the corresponding position on the vehicle and then compress it. This installation method has a great safety hazard. The reason is that when the airbag assembly is in an uncompressed state, the total assembly height of the airbag assembly is approximately 560mm, and the center angle deviation between the upper seat of the airbag and the lower seat of the airbag is about 10° (the deviation value varies with the height). During assembly, the vehicle air pressure (0.9Mpa) needs to be filled and the airbag is compressed. This process is prone to the airbag suddenly exploding, causing safety accidents. At the same time, the existing operation varies from person to person.

[0004] Even though it is easy to think of adopting a non-vehicle assembly method, how to automatically and standardizedly compress the airbag body to a predetermined degree while ensuring safety is currently a problem that needs to be solved. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a fully automatic airbag compression device and a working method thereof.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] On the one hand, the present invention provides a fully automatic airbag compression device, including a top limit plate, a bottom support plate, a lifting device, an inflation device and a pressure relief device, the top limit plate and the bottom support plate are arranged relatively to each other in an upper and lower manner, the lifting device is transmission-connected to the bottom support plate to drive the bottom support plate to move away from or close to the top limit plate, the airbag assembly is placed between the top limit plate and the bottom support plate, the inflation device and the pressure relief device are both connected to the airbag assembly, the inflation device is used to inflate the airbag assembly, and the pressure relief device is used to relieve the pressure of the airbag assembly.

[0008] Furthermore, it also includes a contact switch, which is electrically connected to the inflation device. When the contact switch is triggered, the inflation device is activated to inflate the airbag assembly.

[0009] Furthermore, the contact switch is arranged on the lower surface of the top limiting plate.

[0010] Further, it further includes a travel induction switch, and the travel induction switch is electrically connected to the jacking device. When the travel induction switch is triggered, the operation of the jacking device is stopped.

[0011] Further, it further includes an airbag pressure monitoring sensor, and the airbag pressure monitoring sensor is electrically connected to the pressure relief device. When the actual pressure value of the airbag assembly detected by the pressure relief device is equal to the set pressure value of the airbag assembly, the pressure relief device is stopped from discharging pressure.

[0012] Further, it further includes a pressure regulating valve, and the pressure regulating valve is used to adjust the inflation air pressure of the inflation device for the airbag assembly.

[0013] On the other hand, the present invention also provides a working method for a fully automatic airbag compression device, including:

[0014] Controlling the jacking device to jack up an airbag assembly placed between the top limit plate and the bottom support plate;

[0015] When the top of the airbag assembly moves upward and contacts the top limit plate, start the inflation device to inflate the airbag assembly, and at the same time, the jacking device continues to jack up the airbag assembly to compress the airbag assembly;

[0016] During the compression process of the airbag assembly, start the pressure relief device to exhaust air from the airbag assembly;

[0017] When the jacking device reaches the maximum stroke, stop working, and stop the inflation device from continuing to inflate the airbag assembly;

[0018] When the airbag assembly stops inflating and it is detected that the actual pressure value of the airbag assembly is equal to the set pressure value of the airbag assembly, stop the pressure relief device from continuing to exhaust air from the airbag assembly.

[0019] Further, when simultaneously inflating and exhausting air from the airbag assembly, the inflation amount is greater than the exhaust air amount.

[0020] Further, before the top of the airbag assembly moves upward and contacts the top limit plate and after the top of the airbag moves upward and contacts the top limit plate, the inflation air pressure released by the inflation device during the former process is greater than the inflation air pressure released by the inflation device during the latter process.

[0021] Further, after stopping the pressure relief device from continuing to exhaust air from the airbag assembly when the airbag assembly stops inflating and it is detected that the actual pressure value of the airbag assembly is equal to the set pressure value of the airbag assembly, it further includes:

[0022] Controlling the jacking device to retract downward from the maximum stroke position to return the airbag assembly to the initial position.

[0023] Compared with the prior art, the present invention has the following beneficial effects: a fully automatic airbag compression device, including a top limit plate, a bottom support plate, a lifting device, an inflating device and a pressure relief device, the top limit plate and the bottom support plate are arranged relatively up and down, the lifting device is connected to the bottom support plate in a transmission manner to drive the bottom support plate to move away from or close to the top limit plate, the airbag assembly is placed between the top limit plate and the bottom support plate, the inflating device and the pressure relief device are both connected to the airbag assembly, the inflating device is used to inflate the airbag assembly, and the pressure relief device is used to relieve the pressure of the airbag assembly. By using a fully automatic airbag compression device to compress the airbag assembly, the operational disadvantages caused by on-vehicle assembly are avoided. At the same time, it can be fully automatic and standardized, reducing the differences in operation and saving labor costs.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of a fully automatic airbag compression device provided in a specific embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of an airbag assembly provided in a specific embodiment of the present invention;

[0028] Figure 3 A working method of a fully automatic airbag compression device provided by a specific embodiment of the present invention Figure 1 ;

[0029] Figure 4 A working method of a fully automatic airbag compression device provided by a specific embodiment of the present invention Figure 2 .

[0030] Reference numerals

[0031] 1. Top limit plate; 2. Bottom support plate; 3. Lifting device; 4. Airbag assembly; 41. Airbag body; 42. Airbag upper seat; 43. Airbag lower seat. DETAILED DESCRIPTION

[0032] Next, in combination with specific embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0038] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a fully automatic airbag compression device, including a top limit plate 1, a bottom support plate 2, a lifting device 3, an inflation device and a pressure relief device. The top limit plate 1 and the bottom support plate 2 are arranged relatively to each other up and down, and the lifting device 3 is transmission connected with the bottom support plate 2 to drive the bottom support plate 2 to move away from or close to the top limit plate 1. The airbag assembly 4 is placed between the top limit plate 1 and the bottom support plate 2. The inflation device and the pressure relief device are both connected to the airbag assembly 4. The inflation device is used to inflate the airbag assembly 4, and the pressure relief device is used to relieve the pressure of the airbag assembly 4.

[0039] The top limit plate 1 and the bottom support plate 2 are the limit parts in the compression process of the airbag assembly 4. Their structure and arrangement are the basis for realizing the compression function. The top limit plate 1 and the bottom support plate 2 are made of high-strength metal material. The two are arranged parallel to each other up and down. The cross-sectional area of ​​the top limit plate 1 is greater than or equal to the cross-sectional area of ​​the airbag upper seat 42 of the airbag assembly 4, and the cross-sectional area of ​​the bottom support plate 2 is greater than or equal to the cross-sectional area of ​​the airbag lower seat 43 of the airbag assembly 4. This design is to improve the stability of the airbag body 41 of the airbag assembly 4 when compressing.

[0040] In this embodiment, the fully automatic airbag compression device includes a frame, a top limit plate 1 is provided on the top of the frame, a partition is provided in the middle of the frame, a through hole is opened in the middle of the partition, and a bottom support plate 2 is connected to a lifting device 3. The relative movement of the bottom support plate 2 relative to the top limit plate 1 is realized by the power action of the lifting device 3.

[0041] The jacking device 3, as the core component for driving the movement of the bottom pallet 2, can specifically be a jack. Of course, in some embodiments, the jacking device 3 can be in the form of an electric hydraulic push rod. The cylinder body of the electric hydraulic push rod is fixedly installed on the base of the device through bolts, and one end of the push rod is firmly connected to the central position of the lower surface of the bottom pallet 2 by welding. The electric hydraulic push rod is driven by a motor to drive a hydraulic pump, and the push rod is pushed to extend and retract through the pressure of hydraulic oil, thereby realizing the lifting control of the bottom pallet 2. The jacking device 3 can also use an electric screw jack to replace the electric hydraulic push rod. The electric screw jack drives the screw to rotate through a motor, making the nut move linearly on the screw, thereby realizing the lifting of the bottom pallet 2.

[0042] The inflation device is used to inflate the airbag assembly 4. Specifically, it can use an air compressor as the air source. The air compressor is connected to the inflation port of the airbag assembly 4 through a pressure-resistant rubber hose, and a solenoid valve and a pressure regulating valve are provided on the hose. When it is necessary to inflate the airbag assembly 4, the controller sends a signal to open the solenoid valve, and the air compressor fills the compressed air into the airbag assembly 4 through the hose. The pressure regulating valve can accurately control the air pressure during inflation. In one embodiment, the inflation device can also use a gas storage tank in combination with a pressure reducing valve to replace the air compressor. The gas storage tank pre-stores gas at a certain pressure, and the output air pressure is adjusted through the pressure reducing valve, which can also realize the function of inflating the airbag assembly 4.

[0043] The function of the pressure relief device is to relieve the pressure of the airbag assembly 4. A pneumatic pressure relief valve can be used. The pneumatic pressure relief valve is installed at the air release port of the airbag assembly 4 and is connected to a small air pump through an air pipe. When it is necessary to perform a pressure relief operation, the air pump is started to provide air pressure to the pneumatic pressure relief valve, causing its valve to open, and the gas in the airbag assembly 4 is discharged through the pressure relief valve. In one embodiment, the pressure relief device can also use an electromagnetic pressure relief valve, which controls the opening and closing of the valve through electromagnetic force. Compared with the pneumatic pressure relief valve, the electromagnetic pressure relief valve has a faster response speed and more precise control.

[0044] Through the above-mentioned fully automatic airbag compression device, disadvantages such as limited operation space and complex operation during traditional on-vehicle assembly are avoided, and the fully automatic control of the compression process of the airbag assembly 4 is realized. The standardized operation process of the device reduces the operation differences caused by different operators and ensures the consistency of product quality. At the same time, the automated operation reduces the dependence on manpower, greatly saves labor costs, and improves production efficiency.

[0045] In one embodiment, the fully automatic airbag compression device further includes a contact switch, which is electrically connected to the inflation device. When the contact switch is triggered, the inflation device is started to inflate the airbag assembly 4.

[0046] The contact switch can use a micro switch as the basic structure. This micro switch has the characteristics of small size, high sensitivity, and reliable operation. The contacts of the micro switch are electrically connected to the controller of the inflation device through wires. When the airbag assembly 4 moves upward under the action of the lifting device 3 and contacts the top limit plate 1, it will squeeze the micro switch, causing the contacts inside the micro switch to close, thus forming an electrical signal path and transmitting the trigger signal to the controller of the inflation device.

[0047] Through the designed contact switch, the precise linkage between the inflation operation and the airbag compression process is achieved, ensuring that the inflation device will only start when the airbag assembly 4 contacts the top limit plate 1 and reaches the predetermined compression starting position, avoiding the impact of premature or late inflation on the airbag compression effect and quality, and improving the stability and reliability of airbag compression. On the other hand, through the automated trigger mechanism, the manual judgment and operation links are reduced, further improving the automation degree and production efficiency of the entire airbag compression device, and reducing the risk of human operation errors.

[0048] Of course, in some embodiments, a proximity switch can be used to replace the micro switch. The proximity switch is based on the principle of electromagnetic induction or capacitance induction and can detect the approach of an object without direct contact with the airbag assembly 4. When the airbag assembly 4 rises into the sensing range of the proximity switch, the proximity switch will generate an induction signal and transmit it to the controller, thereby starting the inflation device. This method avoids mechanical contact, reduces switch wear, and improves the service life and stability of the device. In addition, a pressure sensor can also be used as the trigger element. When the airbag assembly 4 contacts the top limit plate 1 and generates a certain pressure, the pressure sensor converts the pressure signal into an electrical signal and transmits it to the controller to start the inflation device. The pressure sensor can not only accurately sense the contact state but also more precisely control the timing and conditions of inflation start by setting the pressure threshold.

[0049] In one embodiment, the contact switch is arranged on the lower surface of the top limit plate 1.

[0050] The contact switch can be installed on this surface by means of bolts or adhesives. To ensure the accuracy of induction, the micro switch is usually installed in the central area or at multiple evenly distributed positions on the lower surface of the top limit plate 1.

[0051] When the lifting device 3 drives the airbag assembly 4 on the bottom support plate 2 to move upward, once the top of the airbag assembly 4 touches the contact switch on the lower surface of the top limit plate 1, the switch action will be triggered. The contact switch usually has two contact states: normally open and normally closed. When not triggered, the normally open contact is in the open state and the normally closed contact is in the closed state; when the airbag assembly 4 touches and presses the contact switch, the normally open contact closes and the normally closed contact opens. This change in state generates an electrical signal, which is transmitted through the connected wire to the control circuit of the inflation device.

[0052] Since the contact switch is directly installed on the lower surface of the top limit plate 1, it can most directly sense whether the airbag assembly 4 has reached the predetermined compression position, thus ensuring that the inflation device starts at the appropriate time, avoiding the impact of premature or late inflation on the airbag compression effect, and ensuring the stability and consistency of the airbag compression quality. Secondly, this installation method makes the structure of the whole device more compact and reasonable. The contact point between the contact switch and the airbag assembly 4 is clear, reducing unnecessary mechanical transmission and signal transmission links, reducing the probability of failure, and improving the reliability and stability of the device.

[0053] In one embodiment, the fully automatic airbag compression device further includes a travel induction switch, which is electrically connected to the lifting device 3. When the travel induction switch is triggered, the operation of the lifting device 3 is stopped.

[0054] The travel induction switch can be an electromagnetic induction type or a photoelectric induction type switch. Taking the electromagnetic induction type travel induction switch as an example, it is installed on the frame, and its specific position is determined according to the maximum travel of the lifting device 3.

[0055] When the lifting device 3 reaches the maximum travel position, the induction trigger enters the induction range of the induction head of the travel induction switch. For the electromagnetic induction type switch, the induction trigger will change the magnetic field around the induction head, so that the induction head generates an electrical signal. After the signal processing module receives the signal from the induction head, it generates a control signal through processing and sends it to the control circuit of the lifting device 3. After receiving the signal, the control circuit immediately cuts off the power source of the lifting device 3 to stop the operation of the lifting device 3.

[0056] By setting the travel induction switch to control the travel of the lifting device 3, the situation of damage to the top limit plate 1, the bottom support plate 2 or the airbag assembly 4 caused by excessive lifting is avoided, protecting the safety of the equipment and products. Secondly, the consistency and accuracy of the airbag compression process are ensured. Each compression operation can stop at the same travel position, making the compression degree of each airbag assembly 4 consistent, and improving the stability of the product quality. In addition, manual intervention is reduced and the production efficiency is improved.

[0057] In some embodiments, in addition to the above electromagnetic induction type and photoelectric induction type stroke induction switches, it can also be a mechanical limit switch, a switch triggered by mechanical collision.

[0058] In one embodiment, the full-automatic airbag compression device further includes an airbag pressure monitoring sensor, which is electrically connected to the pressure relief device. When the actual pressure value detected by the pressure relief device is equal to the set pressure value of the airbag assembly 4, the pressure relief device stops relieving pressure.

[0059] The airbag pressure monitoring sensor can be a high-precision piezoresistive pressure sensor, which is installed at the gas path interface of the airbag assembly 4 by means of threaded connection. For example, a standard threaded interface is reserved near the inflation port of the airbag body 41 of the airbag assembly 4, and the threaded end of the pressure detection sensor is screwed in and tightened to ensure a sealed connection and prevent gas leakage from affecting the detection accuracy. The sensor is electrically connected to the control circuit of the pressure relief device through a shielded cable, and the shielded cable can effectively reduce external electromagnetic interference and ensure the accuracy of signal transmission.

[0060] The airbag pressure monitoring sensor continuously monitors the gas pressure inside the airbag assembly 4. When the actual pressure value reaches the set pressure value, the control circuit outputs a control signal to drive the solenoid valve in the pressure relief device to close, thereby stopping the pressure relief device from relieving pressure.

[0061] Through the designed airbag pressure monitoring sensor, the precise control of the pressure during the compression of the airbag assembly 4 is ensured, so that the airbag body 41 is compressed under the pressure that meets the design requirements, effectively avoiding the problems of damage to the airbag body 41 caused by excessive pressure or insufficient pressure affecting the performance of the airbag assembly 4, and improving the product quality and reliability. Secondly, the automatic control of the pressure relief process is realized, eliminating the need for manual real-time monitoring and manual adjustment of the pressure relief device, reducing the risk of human operation errors, and improving the stability and efficiency of the production process. In addition, through the linkage of the pressure detection sensor and the pressure relief device, the airbag compression process can also be optimized to ensure that each airbag assembly 4 is compressed under the same pressure conditions, guaranteeing the consistency of product quality.

[0062] In addition to the above-mentioned piezoresistive pressure sensor, the airbag pressure monitoring sensor can also adopt a capacitive pressure sensor or a pressure switch, etc.

[0063] In one embodiment, the full-automatic airbag compression device further includes a pressure regulating valve, which is used to regulate the inflation air pressure of the inflation device for the airbag assembly 4.

[0064] The pressure regulating valve can be a direct-acting pressure regulating valve, which is composed of a valve body, a valve core, an adjustment knob, a spring and other components. The valve body is provided with an air inlet, an air outlet and an exhaust port. The air inlet is connected to the air source (such as an air compressor) of the inflation device through a pressure-resistant air pipe, and the air outlet is connected to the inflation port of the airbag body 41 through an air pipe.

[0065] During actual installation, the pressure regulating valve is horizontally fixed on the air pipeline between the inflation device and the airbag body 41, and a stable connection can be achieved through a threaded interface to ensure that the air pipeline is sealed and does not leak.

[0066] The setting of the pressure regulating valve realizes the adjustment of the inflation pressure according to requirements, which helps to improve production efficiency and quality.

[0067] As Figures 1 to 4 shown, the embodiment of the present invention also provides a working method based on the above-mentioned fully automatic airbag compression device, and the method includes the following steps: S10-S50.

[0068] S10. Control the lifting device 3 to lift the airbag assembly 4 placed between the top limit plate 1 and the bottom support plate 2 upward.

[0069] The control system can adopt a PLC (programmable logic controller). After the operator presses the start button on the control panel, the PLC sends a start command to the drive motor of the lifting device 3. Taking the electric hydraulic push rod as the lifting device 3 as an example, the motor drives the hydraulic pump to operate, and the hydraulic pump injects hydraulic oil into the cylinder of the push rod to push the push rod to extend upward, thereby driving the bottom support plate 2 connected to the push rod to rise. Before the bottom support plate 2 rises, the operator needs to place the airbag assembly 4 stably in the central position of the bottom support plate 2 and fix it to ensure that the airbag assembly 4 is evenly stressed during the subsequent compression process.

[0070] S20. When the airbag assembly 4 moves upward until its top contacts the top limit plate 1, start the inflation device to inflate the airbag assembly 4, and at the same time, the lifting device 3 continues to lift the airbag assembly 4 to compress the airbag assembly 4.

[0071] When the airbag assembly 4 rises with the bottom support plate 2, the contact switch (such as a micro switch) installed on the lower surface of the top limit plate 1 monitors the contact state in real time. Once the airbag upper seat 42 of the airbag assembly 4 contacts the top limit plate 1, the micro switch is pressed and triggered, and its internal contacts are closed, generating an electrical signal and transmitting it to the PLC. After receiving the signal, the PLC immediately sends a start command to the controller of the inflation device, for example, controls the air compressor of the inflation device to start working, and inflates the airbag assembly 4 through the connected hose. At the same time, the PLC continuously sends an operation command to the lifting device 3 to keep it in an upward movement state and continue to compress the airbag assembly 4.

[0072] S30. During the compression process of the airbag assembly 4, start the pressure relief device to exhaust air from the airbag assembly 4.

[0073] After the inflation device starts to work, the PLC synchronously sends a start command to the pressure relief device to open the pressure relief device (such as a pneumatic pressure relief valve). During the process of the airbag assembly 4 being compressed and inflated, the internal gas pressure will gradually increase. To prevent damage to the airbag due to excessive pressure, the pressure relief device needs to discharge some gas in a timely manner. The airbag pressure monitoring sensor continuously monitors the internal pressure of the airbag and transmits the data to the PLC.

[0074] It should be noted that when inflating and exhausting air from the airbag assembly 4 simultaneously, the inflation volume is greater than the exhaust volume. The advantage of such a design is that it can ensure that the internal pressure of the airbag body 41 rises within a safe range, enabling the internal gas pressure of the airbag body 41 to increase gradually and smoothly. At the same time, it can keep a certain positive pressure inside the airbag body 41. When the lifting device 3 lifts the airbag assembly 4, the airbag is more easily compressed to the required shape and size under the action of the positive pressure, which helps to effectively compress the airbag assembly 4 and ensure that the compression effect meets the design requirements.

[0075] S40. When the lifting device 3 reaches its maximum stroke, stop working and stop the inflation device from continuing to inflate the airbag assembly 4.

[0076] The stroke of the lifting device 3 is controlled by a stroke induction switch. When the bottom support plate 2 drives the airbag assembly 4 to rise to the maximum stroke, the installed stroke induction switch (such as an electromagnetic induction switch) is triggered. After the electrical signal generated by the induction switch is transmitted to the PLC, the PLC immediately cuts off the power supply of the drive motor of the lifting device 3 to make it stop working. At the same time, the PLC sends a stop command to the inflation device, shuts down the air compressor, and controls the solenoid valve of the inflation device to close to stop inflating the airbag assembly 4.

[0077] S50. When the airbag assembly 4 stops inflating and it is detected that the actual pressure value of the airbag assembly 4 is equal to the set pressure value of the airbag assembly 4, stop the pressure relief device from continuing to exhaust air from the airbag assembly 4.

[0078] After inflation stops, the airbag pressure monitoring sensor continuously monitors the internal pressure of the airbag. When the detected actual pressure value is equal to the preset pressure value, the sensor transmits the signal to the PLC. After receiving the signal, the PLC sends a closing command to the pressure relief device to control the pneumatic pressure relief valve to close and stop exhausting air.

[0079] In an embodiment, before the top of the airbag assembly 4 moves upward and touches the top limit plate 1, compared with after the top of the airbag moves upward and touches the top limit plate 1, the inflation air pressure released by the inflation device during the former process is greater than that during the latter process.

[0080] The advantage of such a design is that before the airbag assembly 4 moves upward and its top contacts the top limit plate 1, a relatively large inflation pressure can enable the airbag to quickly fill with gas in the initial stage. This helps the airbag to quickly reach a certain degree of expansion before being restricted by the top limit plate 1, laying a foundation for the subsequent compression process, reducing the overall compression time, and improving production efficiency. When the top of the airbag contacts the top limit plate 1, the airbag is restricted in the up and down directions. At this time, if a relatively large inflation pressure is continued, it may cause excessive local stress on the airbag, increasing the risk of airbag damage. Reducing the inflation pressure enables the airbag to be compressed in a more gentle manner under the restricted state, ensuring the integrity of the airbag structure and improving the product qualification rate.

[0081] In one embodiment, as Figure 4 shown, after step S50, the following steps are further included: S60.

[0082] S60. Control the lifting device 3 to retract downward from the maximum stroke position so that the airbag assembly 4 returns to the initial position.

[0083] When the PLC receives the signal of "actual pressure value equals set pressure value" transmitted by the airbag pressure monitoring sensor and sends a closing instruction to the pressure relief device, the PLC will further execute a preset program and send a reverse rotation instruction to the drive motor of the lifting device 3. Taking the electric hydraulic push rod as the lifting device 3 as an example, after the drive motor receives the reverse instruction, the hydraulic pump changes the flow direction of the hydraulic oil, causing the hydraulic oil to flow back from the cylinder of the push rod. Under the action of the hydraulic oil pressure and the self - weight of the push rod, the push rod begins to retract downward, facilitating the worker to take out the compressed airbag assembly 4 and completing the entire compression process.

[0084] For steps S10 - S60, the full - automation control of the compression process of the airbag body 41 is realized. A series of operations such as lifting, inflation, pressure relief, and stopping are automatically coordinated and completed, reducing manual intervention and the risk of human operation errors, and greatly improving production efficiency. Secondly, through the precise linkage and control of each device, such as the contact switch accurately triggering the inflation timing, the stroke induction switch accurately controlling the lifting stroke, and the pressure detection sensor real - time monitoring the pressure, etc., the accuracy and consistency of parameters such as the force, inflation, and pressure of the airbag assembly 4 during the compression process are ensured, improving the product quality and qualification rate. In addition, this method can adapt to airbag assemblies 4 of different models and specifications. By presetting relevant parameters (such as inflation pressure, set pressure value, lifting stroke, etc.), the automatic compression of various airbag products can be realized, enhancing the versatility and production flexibility of the equipment.

[0085] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An automatic airbag compression device, characterized in that, It includes a top limit plate, a bottom support plate, a jacking device, an inflation device and a pressure relief device. The top limit plate and the bottom support plate are arranged opposite to each other vertically. The jacking device is in driving connection with the bottom support plate to drive the bottom support plate to move away from or close to the top limit plate. An airbag assembly is placed between the top limit plate and the bottom support plate. Both the inflation device and the pressure relief device are connected to the airbag assembly. The inflation device is used to inflate the airbag assembly, and the pressure relief device is used to relieve the pressure of the airbag assembly.

2. The fully automatic airbag compression device according to claim 1, wherein, It further includes a contact switch, which is electrically connected to the inflation device. When the contact switch is triggered, the inflation device is started to inflate the airbag assembly.

3. The fully automatic airbag compression device according to claim 2, wherein, The contact switch is arranged on the lower surface of the top limit plate.

4. The fully automatic airbag compression device according to claim 1, characterized in that It further includes a travel induction switch, which is electrically connected to the jacking device. When the travel induction switch is triggered, the operation of the jacking device is stopped.

5. The full-automatic airbag compression device according to claim 1, characterized in that, It further includes an airbag pressure monitoring sensor, which is electrically connected to the pressure relief device. When the actual pressure value of the airbag assembly detected by the pressure relief device is equal to the set pressure value of the airbag assembly, the pressure relief device is stopped from relieving the pressure.

6. The fully automatic airbag compression device according to claim 1, characterized in that, It further includes a pressure regulating valve, which is used to regulate the inflation air pressure of the inflation device for the airbag assembly.

7. A working method of a fully automatic airbag compression device, characterized in that, It includes: Controlling the jacking device to jack up the airbag assembly placed between the top limit plate and the bottom support plate; When the top of the airbag assembly moves upward and touches the top limit plate, starting the inflation device to inflate the airbag assembly, and at the same time, the jacking device continues to jack up the airbag assembly to compress the airbag assembly; During the compression process of the airbag assembly, starting the pressure relief device to relieve the pressure and exhaust the air from the airbag assembly; When the jacking device reaches the maximum stroke, stop its operation and stop the inflation device from continuing to inflate the airbag assembly; When the airbag assembly stops inflating and it is detected that the actual pressure value of the airbag assembly is equal to the set pressure value of the airbag assembly, stop the pressure relief device from continuing to relieve the pressure and exhaust the air from the airbag assembly.

8. The working method of a fully automatic airbag compression device according to claim 7, characterized in that, When inflating and relieving the pressure and exhausting the air from the airbag assembly at the same time, the inflation volume is greater than the pressure relief and exhaust volume.

9. The working method of a fully automatic airbag compression device according to claim 7, characterized in that, Before the top of the airbag assembly moves upward and touches the top limit plate and after the top of the airbag moves upward and touches the top limit plate, the inflation air pressure released by the inflation device in the former process is greater than that in the latter process.

10. The working method of a fully automatic airbag compression device according to claim 7, characterized in that, After stopping the pressure relief device from continuing to relieve the pressure and exhaust the air from the airbag assembly when the airbag assembly stops inflating and it is detected that the actual pressure value of the airbag assembly is equal to the set pressure value of the airbag assembly, it further includes: Controlling the jacking device to retract downward from the maximum stroke position to make the airbag assembly return to the initial position.

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