A gas bag based object catapult

Abstract

The application provides a gas bag-based object ejection device, which comprises an ejection bin and an ejection mechanism arranged in the ejection bin, and the ejection mechanism comprises: an ejection gas bag, the ejection gas bag comprises a first side sealing part and a second side sealing part, the first side sealing part and the second side sealing part are sewn at edge positions and form an inflation space between the first side sealing part and the second side sealing part; the first side sealing part and the second side sealing part are overlapped and tightly attached to each other before the inflation space is inflated; an air passage assembly, the air passage assembly is arranged on the first side sealing part and is connected with the outside of the ejection gas bag and the inflation space; and an inflation assembly, the inflation assembly is connected with the inflation space through the air passage assembly, the inflation assembly is used for inflating the inflation space, and the inflation pressure can be adjusted in multiple stages. The ejection device provided by the application has simple structure, can realize stable pressure distribution and can avoid damaging the ejected object during ejection.

Description

Technical Field

[0001] This disclosure generally relates to the field of mechanical ejection technology, and more specifically to an object ejection device based on an air bag. Background Technology

[0002] In the field of mechanical catapult technology, there is a clear demand for object catapult functions in scenarios such as logistics sorting, emergency delivery, and special operations. In particular, it is necessary to accurately achieve stable catapult launch of specific weights and initial velocities to ensure the efficiency and reliability of the operation process and meet the core requirements for catapult accuracy and stability in different scenarios.

[0003] Traditional catapults mostly rely on spring, electromagnetic or hydraulic drive. These devices generally have problems such as complex structure, large overall size or high operating energy consumption, making it difficult to adapt to the above-mentioned scenarios' requirements for compactness, lightweight and low energy consumption of catapults. Furthermore, for fragile objects, catapults driven by these methods are prone to damage. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an object ejection device based on an air bag to solve the above problems.

[0005] This application provides an object ejection device based on an airbag, including an ejection chamber and an ejection mechanism disposed inside the ejection chamber, the ejection mechanism including: An ejection airbag, comprising a first side seal and a second side seal, wherein the edges of the first side seal and the second side seal are sewn together to form an inflation space between the first side seal and the second side seal; before inflation, the first side seal and the second side seal are stacked and pressed tightly against each other. A ventilation assembly is disposed on the first side seal and connects the inflation space with the outside of the ejection air bag; An inflation assembly is provided, which is connected to the inflation space via the ventilation assembly. The inflation assembly is used to inflate the inflation space, and the inflation pressure can be adjusted in multiple levels.

[0006] According to the technical solution provided in the embodiments of this application, the area where the first side seal and the second side seal are sewn together is coated with sealant.

[0007] According to the technical solution provided in the embodiments of this application, the ventilation component includes: An air nozzle passes through the first side seal, with one end extending into and communicating with the inflation space, and the other end communicating with the inflation assembly. A connecting part is placed within the inflation space and located around the air nozzle. The connecting part is integrally and sealed to the air nozzle and is sewn onto the first side seal.

[0008] According to the technical solution provided in the embodiments of this application, the area where the connecting part and the first side sealing part are sewn together is coated with sealant.

[0009] According to the technical solution provided in the embodiments of this application, the air nozzle is located at the center of the first side seal.

[0010] According to the technical solution provided in the embodiments of this application, the air nozzle is placed on the inner wall of one end outside the inflation space to form a guide portion, and the radial dimension of the guide portion near the inflation space is smaller than the radial dimension away from the inflation space.

[0011] According to the technical solution provided in the embodiments of this application, a pressure sensor is provided in the inflation space near the air nozzle to provide real-time feedback on the pressure status inside the inflation space.

[0012] According to the technical solution provided in the embodiments of this application, the end of the air inlet far from the inflation space is also provided with an independent pressure relief valve, which is used to release air from the inflation space when there is overpressure.

[0013] According to the technical solution provided in the embodiments of this application, both the first side seal and the second side seal are double-layer structures, with the inner layer being nylon material and a polyurethane sealing film, and the outer layer being covered with a leak-proof coating.

[0014] According to the technical solution provided in the embodiments of this application, the inflatable assembly includes: Air source device, the air source device being used to provide compressed air; A pressure regulating component, comprising an air inlet and multiple air outlets that can be opened and closed, wherein the air inlet is connected to the air source device. A switching valve, which connects multiple air outlets and air nozzles, is used to control the airflow.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: by sewing the edges of the first and second side seals of the ejection airbag to form an inflation space, and stacking the two tightly before inflation, the ejection mechanism structure is simplified and the overall volume is reduced. It also improves the sealing performance and pressure distribution stability of the inflation space, avoiding the problems of poor sealing and uneven pressure of traditional pneumatic airbags. Furthermore, the ejection method of the airbag can effectively prevent damage to the ejected object. The ventilation component provides a stable channel for inflation. With the multi-level adjustable inflation component, it can adapt to different ejection scenarios and solve the defects of traditional devices such as complex structure, large size, or poor pressure adaptability, thus helping to achieve stable ejection of objects. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A schematic diagram of the structure of the airbag-based object ejection device provided in this application; Figure 2 for Figure 1 The diagram shows the structure of the ejection airbag in the airbag-based object ejection device after inflation. Figure 3 A cross-sectional view of the ejection airbag and ventilation assembly; Figure 4 This is a schematic diagram of the ejection airbag located on one side of the first side seal.

[0017] Reference numerals: 10, ejection airbag; 11, first side seal; 12, second side seal; 13, sealant; 20, ventilation assembly; 21, air nozzle; 22, connecting part; 23, guide part; 24, pressure sensor; 25, independent pressure relief valve; 30, inflation assembly; 31, air source device; 32, pressure regulating component; 33, switch valve. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Please refer to Figures 1-4 This application provides an object ejection device based on an airbag, including an ejection chamber and an ejection mechanism disposed inside the ejection chamber, the ejection mechanism including: The ejection airbag 10 includes a first side seal 11 and a second side seal 12, the edges of the first side seal 11 and the second side seal 12 are sewn together to form an inflation space between the first side seal 11 and the second side seal 12; before inflation, the first side seal 11 and the second side seal 12 are stacked and pressed tightly against each other. Ventilation component 20, which is disposed on the first side seal 11 and connects the inflation space with the outside of the ejection air bag 10; An inflation component 30 is connected to the inflation space via the ventilation component 20. The inflation component 30 is used to inflate the inflation space, and the inflation pressure can be adjusted in multiple levels.

[0021] Specifically, the ejection chamber is a shell structure with a regular accommodating cavity. Its inner wall may have a slight guide slope to limit the movement direction of the object to be ejected and ensure a stable ejection path. The object to be ejected is placed inside the ejection chamber near the output end of the ejection mechanism, directly contacting the ejection air bag 10 of the ejection mechanism. Guide wheels may be provided on the object to be ejected and on the inner wall of the ejection chamber to further improve the smoothness of the object's movement within the ejection chamber.

[0022] Specifically, both the first side seal 11 and the second side seal 12 are flexible sheet structures that can expand smoothly during inflation. The edges of the first side seal 11 and the second side seal 12 are connected by a continuous sewing process. Through the tight sewing along the outer periphery of both, a closed inflation space is formed between the first side seal 11 and the second side seal 12. In the uninflated state (i.e., before the inflation space is inflated), the first side seal 11 and the second side seal 12 are completely stacked and tightly pressed against each other. At this time, the overall thickness of the ejection airbag 10 is relatively thin, which can effectively save the installation space inside the ejection chamber and adapt to compact usage scenarios. The ventilation component 20 serves as a dedicated gas channel between the inflation space and the external inflation component 30, ensuring that the compressed air output by the inflation component 30 can enter the inflation space in a directional and leak-free manner. At the same time, residual gas in the inflation space can also be discharged through this component after ejection. The inflation component 30 is detachably connected to the external end of the ventilation component 20. Its main function is to provide a stable pressure of compressed air for the inflation space, and it has multi-level pressure adjustment capability. In actual use, the output air pressure can be preset and adjusted by the inflation component 30 according to the mass of the object to be launched (such as 5kg, 7kg, 10kg, etc.): for example, for a 10kg object, the inflation pressure is adjusted to the corresponding value to ensure that the object obtains a target initial velocity of 10m / s; for a 5kg object, the pressure is adjusted to a lower value to match the initial velocity of 5m / s, thereby achieving precise matching between objects of different masses and target launch velocities. Through the launch drive method provided in this application, combined with the flexible material of the first side seal 11 and the second side seal 12, a stable launch force can be provided to the object being launched, while avoiding damage to the object being launched by the launch device.

[0023] Workflow: First, place the object to be ejected into the ejection chamber, ensuring that the object is against the side of the second side seal 12 of the ejection air bag 10 away from the first side seal 11, so that there is no relative sliding between the object and the second side seal 12; Second, activate the inflation assembly 30, which inflates compressed air into the inflation space through the ventilation assembly 20. During inflation, the inflation space expands instantaneously, pushing the first side seal 11 and the second side seal 12 apart. The second side seal 12 simultaneously applies a uniform thrust to the object, causing the object to move along the guide direction of the ejection chamber.

[0024] Furthermore, the area where the first side seal 11 and the second side seal 12 are sewn together is coated with sealant 13.

[0025] Specifically, to improve the airtightness of the ejection airbag 10, sealant 13 is evenly applied to the sewing area of ​​the first side seal 11 and the second side seal 12. During assembly of the ejection airbag 10, sealant 13 is first applied to the edge areas of the first side seal 11 and the second side seal 12 to be connected. The sealant 13 is an elastic adhesive that is compatible with the flexible substrate of the side seal and has high-pressure sealing and anti-aging properties. The application range can cover the subsequent sewing line and an area of ​​2-4 mm on each side. After applying the adhesive, the adhesive areas of the first side seal 11 and the second side seal 12 are aligned and attached, and slight pressure is applied to initially bond and fix the adhesive layer. Then, continuous sewing is performed along the center trajectory of the adhesive area to form a double sealing structure of adhesive bonding and sewing fixation.

[0026] Furthermore, the ventilation assembly 20 includes: Air nozzle 21, which penetrates the first side seal 11, with one end extending into the inflation space and communicating with the inflation space, and the other end communicating with the inflation assembly 30; The connecting part 22 is placed in the inflation space and is located around the air nozzle 21. The connecting part 22 is integrally sealed with the air nozzle 21 and is sewn onto the first side seal 11.

[0027] Specifically, the nozzle 21 is made of a hard metal material suitable for high-pressure inflation scenarios. It has a hollow tubular structure with a T-shaped cross-section, and the inner diameter of the tube is adapted to the inflation flow rate requirements. During assembly, a mounting hole matching the outer diameter of the nozzle 21 is first opened at a preset position on the first side seal 11. Before assembling the first side seal 11 and the second side seal 12, the nozzle 21 is passed through the mounting hole, so that one end of the nozzle 21 extends to the outside of the ejection air bag 10, and the other end remains in the inflation space. The end remaining in the inflation space is directly connected to the inflation space for gas delivery; the end extending to the outside is used for detachable connection with the inflation assembly 30 for easy device assembly and maintenance. The connecting part 22 is an annular plate structure integrally formed with the nozzle 21, using the same material as the first side seal 11. It achieves an integral sealed connection through injection molding or welding. Its entirety is located within the inflation space and surrounds the end of the nozzle 21 that extends into the inflation space. The outer diameter of the connecting part 22 is larger than the diameter of the mounting hole on the first side seal 11. During assembly, the connecting part 22 is attached to the inner surface of the first side seal 11 facing the inflation space. Then, a continuous sewing method consistent with the edge sewing process of the first side seal 11 and the second side seal 12 is used to tightly sew and fix it to the first side seal 11 along the outer peripheral edge of the connecting part 22.

[0028] Furthermore, the area where the connecting part 22 and the first side sealing part 11 are sewn together is coated with sealant 13.

[0029] Specifically, before sewing the connecting part 22 to the first side seal 11, a suitable sealant 13 is applied to the sewing area in advance. After the sealant 13 has cured, the connecting part 22 and the first side seal 11 are continuously sewn together to improve the airtightness between the connecting part 22 and the first side seal 11.

[0030] Furthermore, the air nozzle 21 is located at the center of the first side seal 11.

[0031] Specifically, the air nozzle 21 is positioned at the center of the first side seal 11. This arrangement allows the compressed air delivered by the inflation assembly 30 to diffuse evenly from the center of the first side seal 11 to the periphery of the inflation space, ensuring a balanced pressure distribution within the inflation space and avoiding unstable ejection force caused by excessively high or low local pressure.

[0032] Furthermore, the air nozzle 21 is placed on the inner wall of one end outside the inflation space to form a guide portion 23, and the radial dimension of the guide portion 23 near the inflation space is smaller than the radial dimension away from the inflation space.

[0033] Specifically, the guide section 23 has a gradient structure, with its radial dimension on the side closer to the inflation space being smaller than that on the side farther from the inflation space, forming a funnel-shaped or conical transition. This structure can guide the air supply line of the inflation assembly 30 to quickly align with the nozzle 21 interface, reducing the difficulty of docking. At the same time, it ensures smooth airflow when compressed air enters the nozzle 21, avoiding the impact of airflow obstruction at the interface on inflation efficiency, and ensuring that the inflation space is stably pressurized as required.

[0034] Furthermore, a pressure sensor 24 is provided in the inflation space near the air nozzle 21 to provide real-time feedback on the pressure status inside the inflation space.

[0035] Specifically, the probe of pressure sensor 24 faces the interior of the inflation space to collect real-time pressure data within the cavity. A control module is also configured, electrically connected to both pressure sensor 24 and inflation assembly 30. This module receives the real-time internal pressure value transmitted by pressure sensor 24. When the internal pressure reaches a preset target pressure level of inflation assembly 30, the control module immediately sends a stop inflation signal to inflation assembly 30. If the internal pressure does not reach the target value, the control module continuously instructs inflation assembly 30 to supply air, thereby dynamically feeding back and precisely controlling the internal pressure of the inflation space to ensure stable ejection force.

[0036] Furthermore, the end of the air inlet 21 away from the inflation space is also provided with an independent pressure relief valve 25, which is used to release air from the inflation space when there is overpressure.

[0037] Specifically, an independent pressure relief valve 25 is installed at the end of the air nozzle 21 furthest from the inflation space. This valve is connected to the cavity of the air nozzle 21 and is independent of the pressure control structure of the inflation assembly 30. When the pressure inside the inflation space exceeds a preset safety value due to abnormal conditions, the independent pressure relief valve 25 will automatically open to release excess gas from the inflation space; once the internal pressure drops to a safe range, the valve will automatically close. Simultaneously, the control module can receive the opening and closing signals of the independent pressure relief valve 25 to assist in monitoring the air pressure safety status and prevent damage to the ejection airbag or impact on ejection stability due to overpressure.

[0038] Furthermore, both the first side seal 11 and the second side seal 12 are double-layered structures, with the inner layer being made of nylon material and a polyurethane sealing film, and the outer layer being covered with a leak-proof coating.

[0039] Specifically, the inner layers of the first side seal 11 and the second side seal 12 utilize the high airtightness of nylon and polyurethane materials to further enhance the sealing effect of the inflation space; the outer layer is covered with a leak-proof coating, which improves the structural strength of the side seals while further preventing gas leakage. Preferably, the nylon material is nylon 66.

[0040] Furthermore, the inflation assembly 30 includes: Air source device 31, which is used to provide compressed air; Pressure regulating component 32, the pressure regulating component 32 includes an air inlet end and multiple air outlet ends that can be opened and closed, the air inlet end being connected to the air source device 31; A switching valve 33 is connected to multiple air outlets and air nozzles 21, and is used to control the airflow.

[0041] Specifically, the air source device 31 can be a high-pressure air cylinder or an airbag generator to provide compressed air; the pressure regulator 32 has an air inlet and multiple controllable air outlets, with the air inlet connected to the air source device 31, and different air outlets corresponding to different pressure levels to achieve multi-level pressure regulation; the two ends of the switching valve 33 are respectively connected to the multiple air outlets of the pressure regulator 32 and the air nozzle 21 to control the airflow. The control module can be electrically connected to the pressure regulator 32 and the switching valve 33, and according to the internal pressure fed back by the pressure sensor 24, controls the pressure regulator 32 to switch the air outlet level and the switching valve 33 to precisely adapt to different ejection pressure requirements.

[0042] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An object ejection device based on an airbag, characterized in that, It includes an ejection chamber and an ejection mechanism disposed inside the ejection chamber, the ejection mechanism including: An ejection airbag (10) includes a first side seal (11) and a second side seal (12). The edges of the first side seal (11) and the second side seal (12) are sewn together to form an inflation space between them. Before inflation, the first side seal (11) and the second side seal (12) are stacked and pressed tightly against each other. Ventilation assembly (20), the ventilation assembly (20) is disposed on the first side seal (11) and connects the inflation space with the outside of the ejection air bag (10); An inflation component (30) is connected to the inflation space through the ventilation component (20). The inflation component (30) is used to inflate the inflation space, and the inflation pressure can be adjusted in multiple levels.

2. The airbag-based object ejection device according to claim 1, characterized in that, The area where the first side seal (11) and the second side seal (12) are sewn together is coated with sealant (13).

3. The airbag-based object ejection device according to claim 2, characterized in that, The ventilation assembly (20) includes: The air nozzle (21) passes through the first side seal (11), with one end extending into the inflation space and communicating with the inflation space, and the other end communicating with the inflation assembly (30). The connecting part (22) is placed in the inflation space and is located around the air nozzle (21). The connecting part (22) is integrally sealed with the air nozzle (21) and sewn onto the first side seal (11).

4. The airbag-based object ejection device according to claim 3, characterized in that, The area where the connecting part (22) and the first side sealing part (11) are sewn together is coated with sealant (13).

5. The airbag-based object ejection device according to claim 4, characterized in that, The air nozzle (21) is located at the center of the first side seal (11).

6. The airbag-based object ejection device according to claim 5, characterized in that, The air nozzle (21) is placed on the inner wall of one end outside the inflation space to form a guide portion (23), and the radial dimension of the guide portion (23) near the inflation space is smaller than the radial dimension away from the inflation space.

7. The airbag-based object ejection device according to claim 6, characterized in that, A pressure sensor (24) is installed in the inflation space near the air nozzle (21) to provide real-time feedback on the pressure status inside the inflation space.

8. The airbag-based object ejection device according to claim 7, characterized in that, The air nozzle (21) is also provided with an independent pressure relief valve (25) at the end away from the inflation space, which is used to release air from the inflation space when there is overpressure.

9. The airbag-based object ejection device according to claim 1, characterized in that, Both the first side seal (11) and the second side seal (12) are double-layer structures, with the inner layer being made of nylon material and polyurethane sealing film, and the outer layer being covered with a leak-proof coating.

10. The airbag-based object ejection device according to claim 3, characterized in that, The inflation assembly (30) includes: An air source device (31) is used to provide compressed air; Pressure regulating component (32), the pressure regulating component (32) includes an air inlet end and multiple air outlet ends that can be opened and closed, the air inlet end being connected to the air source device (31); A switching valve (33) is connected to multiple air outlets and air nozzles (21) for controlling the air flow.

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