Airbag gas generator shell sealing performance detection device

Abstract

The utility model relates to the technical field of gas generator sealing detection, and discloses a safety airbag gas generator shell sealing performance detection device which comprises a base, a liquid storage tank is fixedly installed on one side of the upper end face of the base, the top end of the liquid storage tank is in threaded connection with a sealing cover, and a lifting assembly is arranged on the sealing cover. A gas generator shell is arranged on the lifting assembly and connected with an inflation assembly, a barometer is fixedly installed on the sealing cover, the receiving end of the barometer vertically penetrates through the sealing cover downwards, gas is injected into the gas generator shell through the arranged inflation assembly, and the gas pressure value of the barometer is observed in the gas injection process. The gas generator shell leaks gas, the leaked gas causes the gas pressure in the liquid storage tank to rise, and therefore it is judged that the gas generator shell does not have the sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of gas generator sealing detection, and in particular to a device for detecting the sealing performance of a housing of a safety airbag gas generator. Background Art

[0002] In order to protect the passengers, an airbag system is usually installed in the car. The airbag system usually includes a gas generator that is activated and discharges gas due to a collision of the vehicle, and an airbag that introduces gas to inflate. The gas generator is a safety component, and the reliability and product stability requirements are extremely high. Therefore, the shell needs to be tested for sealing when the gas generator is produced.

[0003] Existing devices have some drawbacks during use. For example, when performing leak detection on the airbag gas generator housing, it is only possible to detect whether the airbag gas generator housing is leaking gas, but it is difficult to determine the leakage point of the leaking gas. For example, pressure decay tests or foam tests, although they can determine whether there is a leak, often cannot provide the precise location of the leak point. These methods are more based on evaluating the overall performance of the entire system or component, rather than detecting specific leak points. Utility Model Content

[0004] The utility model aims to provide a device for detecting the sealing performance of a housing of a safety airbag gas generator, so as to solve the problem that when performing leakage detection on the housing of a safety airbag gas generator, only whether the housing of the safety airbag gas generator leaks gas can be detected, but it is difficult to determine the leakage point of the leaked gas.

[0005] The utility model provides the following technical solution: a device for detecting the sealing performance of a safety airbag gas generator housing, comprising a base, a liquid storage tank being fixedly mounted on one side of an upper end surface of the base, a sealing cover being threadedly connected to the top end of the liquid storage tank, a lifting assembly being arranged on the sealing cover, a gas generator housing being arranged on the lifting assembly, a charging assembly being connected to the gas generator housing, a pressure gauge being fixedly mounted on the sealing cover, and a receiving end of the pressure gauge passing vertically downward through the sealing cover.

[0006] As a preferred embodiment of the above technical solution, the lifting assembly includes two screw rods vertically penetrating the sealing cover, the two screw rods are arranged laterally symmetrically, and the two screw rods are rotatably connected to the sealing cover, a driving motor is fixedly installed on the top of the two screw rods, a movable sleeve is threadedly sleeved on the outer wall of the bottom of the two screw rods, and connecting blocks are fixedly connected to the side walls of the two movable sleeves, a storage plate is fixedly connected between the two connecting blocks, and the gas generator housing is detachably fixed to the storage plate.

[0007] As a preferred embodiment of the above technical solution, a plurality of threaded holes are provided in a circular array on the storage plate, and matching bolts are inserted into the threaded holes. The gas generator housing is fixed to the storage plate through the bolts and the threaded holes.

[0008] As a preferred embodiment of the above technical solution, a plurality of cylindrical pads are fixed in a circular array on the upper end surface of the storage plate.

[0009] As a preferred embodiment of the above technical solution, anti-dropping blocks are fixedly installed at the bottom ends of the two screw rods.

[0010] As a preferred embodiment of the above technical solution, two mounting frames are fixedly mounted on the upper end surface of the sealing cover, and the two driving motors are fixedly mounted on the corresponding mounting frames.

[0011] As a preferred embodiment of the above technical solution, the inflation assembly includes an air pump fixedly mounted on a base and a through tube fixedly connected to the center of a sealing cover, an air outlet end of the air pump is fixedly connected to an air guide tube, an end of the air guide tube away from the air pump passes through the through tube and the end is fixed to the air inlet end of a gas generator housing.

[0012] As a preferred embodiment of the above technical solution, a plurality of auxiliary handles are annularly fixedly connected to the outer wall of the sealing cover.

[0013] As a preferred embodiment of the above technical solution, a plurality of racks for placing sealing covers are fixed in a circular array on the other side of the upper end surface of the base.

[0014] As a preferred embodiment of the above technical solution, a controller is fixedly mounted on the upper end surface of the base, an alarm is fixedly mounted on the upper end surface of the controller, the barometer is electrically connected to the controller, and the controller is electrically connected to the alarm.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In the utility model, gas is injected into the gas generator shell by means of the provided inflation component, and the air pressure value of the barometer is observed during the injection process. When the air pressure value rises, the gas generator shell is leaking, and the leaked gas causes the air pressure in the liquid storage tank to rise. Therefore, it is judged that the gas generator shell is not sealed. In order to find the leakage point of the gas generator shell, the gas generator shell can be lowered into the liquid by means of the provided lifting component, so that the gas generator shell is completely immersed in the liquid, and then the reaction of various parts of the gas generator shell is observed. If bubbles are constantly coming out at a certain place, it means that the leakage point is here. The device can not only detect the sealing of the generator shell, but also find the leakage point, and the structure is simple and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of a three-dimensional structure from a first-view perspective of a device for testing the sealing performance of a housing of a safety airbag gas generator;

[0018] Figure 2 A schematic diagram of the third perspective structure of a device for testing the sealing performance of a housing of a safety airbag gas generator;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the lifting assembly from the first perspective;

[0020] Figure 4 It is a schematic diagram of the distribution structure of the cylindrical pad and the threaded hole;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the lifting assembly from a second perspective.

[0022] In the figure: 10, base; 11, liquid storage tank; 12, sealing cover; 121, auxiliary handle; 13, gas generator housing; 14, pressure gauge; 15, storage rack; 20, screw rod; 21, drive motor; 22, movable sleeve; 23, connecting block; 24, storage plate; 25, threaded hole; 26, bolt; 27, cylindrical spacer; 28, anti-slip block; 29, mounting bracket; 30, air pump; 31, through pipe; 32, air guide pipe; 40, controller; 41, alarm. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Example 1

[0025] like Figure 1 and Figure 5As shown, the utility model provides a technical solution: a device for detecting the sealing performance of a safety airbag gas generator housing, comprising a base 10, a liquid storage tank 11 is fixedly installed on one side of the upper end surface of the base 10, a sealing cover 12 is threadedly connected to the top of the liquid storage tank 11, and a plurality of auxiliary handles 121 are fixedly connected in an annular manner on the outer wall of the sealing cover 12, and the auxiliary handles 121 are arranged to facilitate the staff to grasp the sealing cover 12, a lifting assembly is arranged on the sealing cover 12, a gas generator housing 13 is arranged on the lifting assembly, and an inflation assembly is connected to the gas generator housing 13, and a barometer 14 is fixedly installed on the sealing cover 12, and the receiving end of the barometer 14 vertically passes through the sealing cover 12 downward, and during specific use, firstly, the inner side of the liquid storage tank 11 is filled with liquid (such as distilled water), and it does not need to be filled up, and the liquid level can be located in the middle position of the liquid storage tank 11, and then the sealing cover 12 is threadedly tightened On the liquid storage tank 11, the gas generator shell 13 is then injected with gas through the provided inflation assembly. During the injection process, the air pressure value of the barometer 14 is observed. When the air pressure value rises, the gas generator shell 13 is leaking, and the leaked gas causes the air pressure in the liquid storage tank 11 to rise. Therefore, it is judged that the gas generator shell 13 is not sealed. In order to find the leakage point of the gas generator shell 13, the gas generator shell 13 can be lowered into the liquid through the provided lifting assembly, so that the gas generator shell 13 is completely immersed in the liquid, and then the reaction of various parts of the gas generator shell 13 is observed. If bubbles are constantly coming out somewhere, it means that the leakage point is here. It should be noted that the liquid storage tank 11 is made of transparent material to facilitate observation by the staff. The device can not only detect the sealing of the generator shell, but also find the leakage point. It has a simple structure and is practical.

[0026] As an implementation method in this embodiment, Figure 3 and Figure 4As shown, the lifting assembly includes two screw rods 20 that vertically penetrate the sealing cover 12. The two screw rods 20 are symmetrically arranged laterally, and the two screw rods 20 are rotatably connected to the sealing cover 12. The screw rods 20 rotate on the sealing cover 12 through the sealing bearing. The bottom ends of the two screw rods 20 are fixedly installed with anti-dropping blocks 28 to prevent the movable sleeve 22 from falling off due to excessive rotation of the screw rods 20. The top ends of the two screw rods 20 are fixedly installed with drive motors 21. Two mounting frames 29 are fixedly installed on the upper end surface of the sealing cover 12. The two drive motors 21 are fixedly installed on the corresponding mounting frames 29 to stably install the drive motors 21. The two screw rods 20 are fixed, and a movable sleeve 22 is threadedly sleeved on the outer wall at the bottom. The side walls of the two movable sleeves 22 are fixedly connected with connecting blocks 23. A storage plate 24 is fixedly connected between the two connecting blocks 23. The gas generator housing 13 is detachably fixed on the storage plate 24. During specific use, the screw rod 20 is driven to rotate by the provided driving motor 21, so that the screw rod 20 drives the movable sleeve 22 to rotate, and the movable sleeve 22 moves up and down on the outer wall of the screw rod 20, thereby driving the storage plate 24 up and down through the connecting block 23, so that the gas generator housing 13 moves up and down synchronously.

[0027] As an implementation method in this embodiment, Figure 4 As shown, a plurality of threaded holes 25 are provided in a circular array on the storage plate 24, and matching bolts 26 are inserted into the threaded holes 25. The gas generator housing 13 is fixed to the storage plate 24 by the bolts 26 and the threaded holes 25, so that the gas generator housing 13 will not be offset during the up and down movement.

[0028] As an implementation method in this embodiment, Figure 4 As shown, a plurality of cylindrical pads 27 are fixed in a circular array on the upper end surface of the placement plate 24. During specific use, the cylindrical pads 27 are arranged so that the lower end surface of the gas generator housing 13 does not contact the upper end surface of the placement plate 24, allowing the liquid to contact the lower end surface of the gas generator housing 13.

[0029] As an implementation method in this embodiment, Figure 1 and Figure 5 As shown, the inflation assembly includes an air pump 30 fixedly mounted on the base 10 and a through-tube 31 fixedly connected to the center of the sealing cover 12. The air outlet end of the air pump 30 is fixedly connected to an air guide tube 32. The end of the air guide tube 32 away from the air pump 30 passes through the through-tube 31 and the end is fixed to the air inlet end of the gas generator housing 13. During specific use, the air pump 30 is set to fill the inner side of the gas generator housing 13 with gas, and the air guide tube 32 is used to connect the air pump 30 and the gas generator housing 13, and the through-tube 31 is used to insert the air guide tube 32.

[0030] As an implementation method in this embodiment, Figure 2 As shown, a plurality of racks 15 for placing sealing covers 12 are fixed in a circular array on the other side of the upper end surface of the base 10. The sealing covers 12 are placed on the racks 15. Placing the sealing covers 12 on the racks 15 can facilitate the staff to install and fix the gas generator housing 13.

[0031] As an implementation method in this embodiment, Figure 2 As shown, a controller 40 is fixedly installed on the upper end surface of the base 10, an alarm 41 is fixedly installed on the upper end surface of the controller 40, the barometer 14 is electrically connected to the controller 40, and the controller 40 is electrically connected to the alarm 41. During specific use, the barometer 14 uses a digital barometer 14, and the digital barometer 14 has a serial port function, which can be connected to a computer or controller 40 through the serial port for data transmission. When the value on the barometer 14 reaches the preset value of the controller 40, the controller 40 will activate the alarm 41 to sound an alarm after receiving the data, thereby reminding the staff that the sealing of the gas generator housing 13 is unqualified.

[0032] Working principle: first, fill the inner side of the liquid storage tank 11 with liquid (such as distilled water), it does not need to be filled up, the liquid level can be in the middle of the liquid storage tank 11, then screw the sealing cover 12 onto the liquid storage tank 11, and then inject gas into the gas generator housing 13 through the provided inflation component, observe the air pressure value of the barometer 14 during the injection process, when the air pressure value rises, the gas generator housing 13 is leaking, and the leaked gas causes the air pressure in the liquid storage tank 11 to rise, so it is judged that the gas generator housing 13 is not airtight, and in order to find the leaking point of the gas generator housing 13, the gas generator housing 13 can be lifted and lowered by the provided lifting component. The body 13 is lowered into the liquid. When in use, the drive motor 21 is provided to drive the screw 20 to rotate, so that the screw 20 drives the movable sleeve 22 to rotate, and the movable sleeve 22 moves up and down on the outer wall of the screw 20, thereby driving the storage plate 24 to move up and down through the connecting block 23, so that the gas generator shell 13 moves up and down synchronously, so that the gas generator shell 13 is completely immersed in the liquid, and then observe the reaction of various parts of the gas generator shell 13. If bubbles are constantly coming out somewhere, it means that the leak is here. It should be noted that the liquid storage tank 11 is made of transparent material for observation by staff.

[0033] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A device for testing the sealing performance of a housing of a safety airbag gas generator, comprising a base (10), characterized in that: A liquid storage tank (11) is fixedly mounted on one side of the upper end surface of the base (10); a sealing cover (12) is threadedly connected to the top end of the liquid storage tank (11); a lifting assembly is arranged on the sealing cover (12); a gas generator housing (13) is arranged on the lifting assembly; the gas generator housing (13) is connected to an inflation assembly; a pressure gauge (14) is fixedly mounted on the sealing cover (12); a receiving end of the pressure gauge (14) vertically passes through the sealing cover (12) downward.

2. The airbag gas generator housing sealing performance detection device according to claim 1, characterized in that: The lifting assembly comprises two screw rods (20) vertically penetrating the sealing cover (12), the two screw rods (20) being arranged symmetrically in the transverse direction, and the two screw rods (20) being rotatably connected to the sealing cover (12), a driving motor (21) being fixedly mounted on the top of the two screw rods (20), a movable sleeve (22) being threadedly sleeved on the outer wall of the bottom of the two screw rods (20), a connecting block (23) being fixedly connected to the side wall of the two movable sleeves (22), a storage plate (24) being fixedly connected between the two connecting blocks (23), and the gas generator housing (13) being detachably fixed on the storage plate (24).

3. The airbag gas generator housing sealing performance detection device according to claim 2, characterized in that: The storage plate (24) is provided with a plurality of threaded holes (25) in an annular array, each of the threaded holes (25) is provided with an adapted bolt (26), and the gas generator housing (13) is fixed to the storage plate (24) via the bolts (26) and the threaded holes (25).

4. The airbag gas generator housing sealing performance detection device according to claim 3, characterized in that: A plurality of cylindrical pads (27) are fixed in an annular array on the upper end surface of the storage plate (24).

5. The airbag gas generator housing sealing performance detection device according to claim 2, characterized in that: Anti-drop blocks (28) are fixedly mounted at the bottom ends of the two screw rods (20).

6. The airbag gas generator housing sealing performance detection device according to claim 2, characterized in that: Two mounting frames (29) are fixedly mounted on the upper end surface of the sealing cover (12), and the two driving motors (21) are fixedly mounted on the corresponding mounting frames (29).

7. The airbag gas generator housing sealing performance detection device according to claim 1, characterized in that: The inflation assembly comprises an air pump (30) fixedly mounted on a base (10) and a through-tube (31) fixedly connected to the center of a sealing cover (12); an air outlet end of the air pump (30) is fixedly connected to an air guide tube (32); an end of the air guide tube (32) away from the air pump (30) passes through the through-tube (31) and an end thereof is fixed to an air inlet end of a gas generator housing (13).

8. The airbag gas generator housing sealing performance detection device according to claim 1, characterized in that: A plurality of auxiliary handles (121) are annularly fixedly connected to the outer wall of the sealing cover (12).

9. The airbag gas generator housing sealing performance detection device according to claim 1, characterized in that: A plurality of racks (15) for placing sealing covers (12) are fixed in a circular array on the other side of the upper end surface of the base (10).

10. The airbag gas generator housing sealing performance detection device according to claim 1, characterized in that: A controller (40) is fixedly mounted on the upper end surface of the base (10), an alarm (41) is fixedly mounted on the upper end surface of the controller (40), the barometer (14) is electrically connected to the controller (40), and the controller (40) is electrically connected to the alarm (41).

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