CN210800703U

CN210800703U - Gas generator vacuumizing helium injection device for safety airbag

Info

Publication number: CN210800703U
Application number: CN201921465164.6U
Authority: CN
Inventors: 吴屋良宽
Original assignee: Jun Sheng Automotive Safety System Changxin Co ltd
Current assignee: Jun Sheng Automotive Safety System Changxin Co ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-06-19
Anticipated expiration: 2029-09-04

Abstract

The utility model discloses a vacuumizing helium injection device of a gas generator for an air bag, relating to the technical field of gas generator processing devices; the helium filling machine comprises a vacuum cavity for accommodating a gas generator to vacuumize and fill helium into the gas generator, a carrying mechanism for carrying the gas generator to and from the vacuum cavity, a vacuum pump for vacuumizing the vacuum cavity, and a helium filling machine for filling helium into the vacuum cavity. The utility model provides a helium device is annotated with gas generator evacuation for air bag, helium high-usage. In addition, the helium injection device has good quality, environmental protection and simple structure.

Description

Gas generator vacuumizing helium injection device for safety airbag

Technical Field

The utility model belongs to the technical field of gas generator processingequipment, in particular to gas generator evacuation helium injection device for air bag.

Background

The gas generator is an important part of the automobile safety airbag, and helium needs to be injected when the gas generator is produced and processed; traditional gas generator includes the lower cover, be located the lower cover around and with lower cover integrated into one piece's flange, with lower cover complex upper cover, traditional helium's of annotating technology is: a gap of about 8mm is kept between the upper cover and the lower cover, a helium injection pipe extends into the gap, helium is directly injected through a helium injection machine, the helium exhausts air in the gas generator, the concentration of the helium in the gas generator is slowly increased through long-time helium injection, and in the process, the helium is continuously discharged into the air through the 8mm gap, so that the air is polluted, and meanwhile, the helium is wasted.

Chinese patent CN204279333U, patent name "pyrotechnic gas generator for car air bag", disclose a pyrotechnic gas generator for car air bag, on cover and be equipped with the short circuit ring, the short circuit ring is connected with some firearm, and upper cover and some firearm are connected structure as an organic whole, upper cover internally mounted has the injection molding, and the injection molding is connected with the biography firetube, is equipped with the venthole on the biography firetube, and the second sealing strip is installed to venthole department, the internally mounted of biography firetube and filter has the medicament, be provided with first filler and second filler between medicament and second fixed ring, be connected with first solid fixed ring on the filter, the inferior valve is equipped with the venthole, and first sealing strip is installed to venthole department. The gas generator adopts the traditional helium injection process, and the air is polluted in the helium injection process, and meanwhile, the helium is wasted.

Disclosure of Invention

The utility model aims at overcoming the shortcoming that prior art helium utilization ratio is low, providing a gas generator evacuation helium filling device for air bag, the helium utilization ratio is high.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a vacuumizing helium injection device for a gas generator for an air bag comprises a vacuum cavity for accommodating the gas generator to vacuumize and inject helium to the gas generator, a conveying mechanism for conveying the gas generator to and from the vacuum cavity, a vacuum pump for vacuumizing the vacuum cavity, and a helium injection machine for injecting helium to the vacuum cavity. The gas generator is placed in a vacuum cavity, the vacuum pump is used for pumping air into the vacuum cavity, the air is pumped out, so that the air in the gas generator is pumped out, then the helium injection machine works, helium is injected into the vacuum cavity, the helium enters the gas generator, then the carrying mechanism carries the gas generator which is subjected to helium injection to a friction welding device for friction welding, and finally the upper cover and the lower cover are welded together. The volume of the vacuum cavity is slightly larger than that of the gas generator, so that the waste of helium is greatly reduced, and the utilization rate of the helium is greatly improved.

Preferably, the vacuum cavity comprises a lower cavity, an upper cavity which is positioned above the lower cavity and is matched with the lower cavity, and a lifting mechanism for lifting the upper cavity, wherein the lower cavity is provided with a vacuumizing hole for connecting the vacuum pump and a helium injection hole for connecting the helium injection machine. The lower cavity is used for supporting the gas generator, the upper cavity and the lower cavity form a vacuum cavity after descending, and the upper cavity is convenient for the carrying mechanism to carry the gas generator after ascending, and the structure is simple.

Preferably, the lower cavity comprises a lower cover groove matched with a lower cover of the gas generator, the upper cover comprises an upper cover groove used for accommodating a flange exposed above the lower cavity and the upper cover when the gas generator is placed on the lower cavity, a gap exists between the flange and the upper edge of the lower cavity, and the carrying mechanism is a carrying mechanism for clamping the flange for carrying. The lower cover groove is matched with the lower cover, helium waste is reduced, and a gap exists between the flange and the upper edge of the lower cavity, so that clamping is facilitated.

As preferred, handling mechanism includes the linear motor of horizontal placing, vertical second linear motor, fixture of placing, linear motor includes track portion, sliding connection the portion of slideing on the track portion, second linear motor includes second track portion, the second sliding connection of rigid coupling on the portion of slideing on the second track portion, fixture includes bottom plate, two chucks of sliding connection on the bottom plate of rigid coupling on the second sliding portion, be located two chucks between the chuck gear, be located the motor that just is used for the rotating gear on the bottom plate, the chuck is close to another chuck one side and all is equipped with the recess that is used for embedding the flange, the chuck is close to the equal rigid coupling in another chuck one side and has the rack, and the rack toothing of one of them chuck is in the upside of gear, and the rack toothing of another chuck is in the downside of gear. The linear motor is used as a displacement device, so that the structure is simple, and the maintenance and the replacement are convenient.

Preferably, the chuck comprises a sliding block connected to the bottom plate in a sliding manner, a supporting rod fixedly connected to one side, far away from the bottom plate, of the sliding block, and a clamping block fixedly connected to one side, far away from the sliding block, of the supporting rod, the groove is formed in the clamping block, and the rack is fixedly connected to the sliding block. The supporting rods are horizontally arranged, and the clamping blocks are used for clamping the flanges.

Preferably, the lifting mechanism comprises a top plate located above the upper cavity, a second support column used for supporting the top plate, an electric cylinder fixedly connected to the top plate, a lifting plate located below the top plate and connected with the electric cylinder, and a guide rod penetrating through the top plate and slidably connected with the top plate, wherein the bottom end of the guide rod is connected to the lifting plate, and the upper cavity is fixedly connected to the lifting plate. The structure is simple.

Preferably, an assembling mechanism for assembling the gas generator is arranged on one side of the lower cavity, the assembling mechanism comprises a supporting ring, a supporting column and a correlation sensor, the supporting ring is used for being embedded into the lower cover and dragging a flange around the lower cover, the supporting column is used for supporting the supporting ring, the correlation sensor is used for detecting the assembling accuracy of the upper cover and the lower cover, and a second groove used for enabling the flange to be embedded into the groove is formed in the supporting ring. In order to ensure the quality of helium injection, the gap between the upper cover and the lower cover is not large, only 2mm is needed, the leakage is prevented from being too fast after the helium injection is good and during the transportation, meanwhile, the helium injection pipe does not need to be stretched into, and the 2mm gap is enough for nitrogen to flow in; in order to ensure the size of the gap, before the gas generator is placed in the vacuum cavity, the installation condition is detected by using the correlation sensor, and the installation precision is ensured.

The utility model has the advantages that: the utility model provides a helium device is annotated with gas generator evacuation for air bag, helium high-usage. In addition, the helium injection device has good quality, environmental protection and simple structure.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic view of another perspective of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a schematic view of another viewing angle of the present invention;

FIG. 5 is an enlarged view at B in FIG. 4;

FIG. 6 is a schematic view of a clamping mechanism;

FIG. 7 is a schematic view of the gas generator after it is placed on the lower chamber;

FIG. 8 is an enlarged view at C of FIG. 7;

FIG. 9 is an enlarged view of FIG. 7 at D;

fig. 10 is a schematic diagram of a gas generator.

In the figure: the gas generator comprises a gas generator 1, a lower cavity 2, an upper cavity 3, a vacuumizing hole 4, a helium injection hole 5, a lower cover 6, a flange 7, an upper cover 8, a lower cover groove 9, an upper cover groove 10, a rail part 11, a sliding part 12, a second rail part 13, a second sliding part 14, a bottom plate 15, a chuck 16, a gear 17, a groove 18, a rack 19, a supporting ring 21, a support column 22, an opposite sensor 23, a top plate 24, a second support column 25, an electric cylinder 26, a lifting plate 27, a guide rod 28, a support rod 29, a second groove 30, a clamping block 31 and a slide block 32.

Detailed Description

The invention will be further explained in detail with reference to the drawings and the following detailed description:

example (b):

fig. 1 to 10 show a gas generator evacuation helium injection device for an airbag, including a vacuum chamber for accommodating a gas generator 1 to evacuate and inject helium to the gas generator 1, and a transport mechanism for transporting the gas generator 1 to and from the vacuum chamber; the vacuum cavity comprises a lower cavity 2, an upper cavity 3 which is positioned above the lower cavity 2 and is matched with the lower cavity 2, and a lifting mechanism for lifting the upper cavity 3, wherein the lower cavity 2 is provided with a vacuumizing hole 4 for connecting a vacuum pump and a helium injection hole 5 for connecting a helium injection machine; elevating system is including being located the roof 24 of last cavity 3 top, being used for supporting second pillar 25 of roof 24, rigid coupling on roof 24 electric jar 26, be located roof 24 below and with the lifter plate 27 that electric jar 26 is connected, wear to establish on roof 24 and with roof 24 sliding connection's guide bar 28, guide bar 28 bottom is connected on lifter plate 27, go up cavity 3 rigid coupling on lifter plate 27. The gas generator 1 comprises a lower cover 6, a flange 7 which is positioned around the lower cover 6 and is integrally formed with the lower cover 6, and an upper cover 8 matched with the lower cover 6, wherein the lower cavity 2 comprises a lower cover groove 9 matched with the lower cover 6, the upper cover 8 comprises an upper cover groove 10 used for accommodating the flange 7 exposed above the lower cavity 2 and the upper cover 8 when the gas generator 1 is placed on the lower cavity 2, a gap is formed between the flange and the upper edge of the lower cavity, and the carrying mechanism is a carrying mechanism for clamping the flange 7 for carrying; the carrying mechanism comprises a linear motor which is transversely arranged, a second linear motor which is vertically arranged and a clamping mechanism, the linear motor comprises a track part 11 and a sliding part 12 connected on the track part 11 in a sliding way, the second linear motor comprises a second track part 13 fixedly connected with the sliding part 12, a second sliding part 14 connected with the second track part 13 in a sliding way, the clamping mechanism comprises a bottom plate 15 fixedly connected on the second sliding part 14, two clamping heads 16 connected on the bottom plate 15 in a sliding way, a gear 17 positioned between the two clamping heads 16, a motor positioned on the bottom plate 15 and used for rotating the gear 17, a groove 18 for embedding the flange 7 is arranged on one side of the chuck 16 close to the other chuck 16, a rack 19 is fixedly connected on one side of the chuck 16 close to the other chuck 16, the rack 19 of one chuck 16 is meshed with the upper side of the gear 17, and the rack 19 of the other chuck 16 is meshed with the lower side of the gear 17; the chuck 16 comprises a sliding block 32 connected to the bottom plate 15 in a sliding manner, a supporting rod 29 fixedly connected to one side of the sliding block 32 far away from the bottom plate 15, and a clamping block 31 fixedly connected to one side of the supporting rod 29 far away from the sliding block 32, the groove 18 is positioned on the clamping block 31, and the rack 19 is fixedly connected to the sliding block 32; lower cavity 2 one side is equipped with the assembly devices who is used for assembling gas generator 1, assembly devices is including the filler ring 21 that is used for imbedding lower cover 6 and drags flange 7 around lower cover 6, the pillar 22 that is used for supporting filler ring 21, the correlation sensor 23 that is used for detecting upper cover 8 and lower cover 6 assembly accuracy, be equipped with the second recess 30 that is used for flange 7 embedding recess 18 on the filler ring 21.

When the embodiment is used:

firstly, embedding a lower cover 6 into a supporting ring 21, enabling a flange 7 to abut against the supporting ring 21, then placing an upper cover 8 on the lower cover 6, arranging vertically-placed fixing rods on two opposite sides of the supporting ring 21, wherein an opposite-shooting sensor 23 comprises a transmitting end and a receiving end, the transmitting end and the receiving end are respectively fixedly connected to the fixing rods on the two opposite sides of the supporting ring 21, and judging the assembling condition of the lower cover and the upper cover 8 by utilizing the opposite-shooting sensor 23 is a conventional means and is not described in detail; after the gas generator 1 is assembled, the sliding part 12 slides to the corresponding position of the gas generator 1 along the rail part 11, the sliding part 12 drives the second rail part 13 to slide, the second rail part 13 drives the second sliding part 14 to slide, then, the second sliding part 14 slides along the second rail part 13, the second sliding part 14 drives the clamping blocks 31 to move to the height of the flange 7, the clamping blocks 31 are positioned at two opposite sides of the lower cover, at this time, the gear 17 rotates, the rack 19 slides, the two clamping blocks 31 are folded, the lower ends of the clamping blocks 31 enter the second groove 30, the flange 7 is embedded into the groove 18, the second sliding part 14 rises, the gas generator 1 is lifted, the gas generator 1 moves to the upper part of the lower cavity 2 under the driving of the sliding part 12, then the second sliding part 14 descends, the lower cover is embedded into the lower cover groove 9, when the lower cover is embedded into the lowest point of the lower cover groove 9, a gap exists between the flange 7 and the upper edge of the lower cavity 2, then the clamping block 31 is loosened, the electric cylinder 26 moves, the guide rod 28 slides on the top plate 24, the electric cylinder 26 drives the lifting plate 27 to descend, the lifting plate 27 drives the upper cavity 3 to descend, the flange 7 and the upper cover 8 enter the upper cover groove 10, the lower edge of the upper cavity 3 is attached to the upper edge of the lower cavity 2 to form a vacuum cavity, the vacuum pump operates to extract air in the vacuum cavity, the air is extracted from the vacuum cavity through the vacuumizing hole 4, negative pressure is formed in the vacuum cavity, after certain negative pressure is achieved, extraction is stopped, the helium injector works, the helium injector is mature prior art, the helium injector injects helium gas into the vacuum cavity through the helium injecting hole 5, a gap of about 2mm is left between the upper cover 8 and the lower cover 6, the helium gas enters the gas generator 1 through the gap, when the pressure in the vacuum cavity reaches a certain value, the helium injector stops working, the upper cavity 3 ascends under the action of the lifting mechanism, then the clamping block 31 is folded, the flange 7 is clamped, the gas generator 1 is lifted, then the gas generator is horizontally conveyed to a friction welding device for friction welding, the friction welding device is mature prior art, repeated description is not needed, and finally the upper cover 8 and the lower cover are welded together.

It should be noted that, there are several air outlets used for inflating the air bag on the upper cover 8, there are aluminium foils used for sealing on the air outlet, therefore, in the course of carrying from lower cover to friction welding apparatus, only 2mm space between lower cover and the upper cover 6 will leak helium, the speed of this leakage does not basically influence the concentration of helium; the traditional helium injection process comprises the following steps: a gap of about 8mm is kept between the upper cover and the lower cover, a helium injection pipe extends into the gap, helium is directly injected through a helium injection machine, the helium exhausts air in the gas generator 1, the concentration of the helium in the gas generator 1 is slowly increased through long-time helium injection, and in the process, the helium is continuously discharged into the air through the 8mm gap, so that the air is polluted, and meanwhile, the helium is wasted.

Claims

1. A vacuumizing helium injection device of a gas generator for an air bag is characterized by comprising a vacuum cavity, a conveying mechanism, a vacuum pump and a helium injection machine, wherein the vacuum cavity is used for accommodating the gas generator to vacuumize and inject helium to the gas generator, the conveying mechanism is used for conveying the gas generator to and from the vacuum cavity, the vacuum pump is used for vacuumizing the vacuum cavity, and the helium injection machine is used for injecting helium to the vacuum cavity.

2. The gas generator vacuumizing helium injection device for an airbag as claimed in claim 1, wherein the vacuum cavity comprises a lower cavity, an upper cavity located above the lower cavity and matched with the lower cavity, a lifting mechanism for lifting the upper cavity, and a vacuumizing hole and a helium injection hole, the vacuumizing hole is used for being connected with the vacuum pump, and the helium injection hole is used for being connected with the helium injection machine, and the vacuumizing hole is arranged on the lower cavity.

3. The gas generator evacuation helium injection device for an airbag according to claim 2, wherein the lower chamber comprises a lower cover groove adapted to a lower cover of the gas generator, the upper chamber comprises an upper cover groove for accommodating a flange exposed above the lower chamber and the upper cover when the gas generator is placed on the lower chamber, a gap exists between the flange and an upper edge of the lower chamber, and the carrying mechanism is a carrying mechanism for clamping the flange for carrying.

4. The gas generator evacuation helium injection device for an airbag according to claim 3, wherein the carrying mechanism comprises a horizontally disposed linear motor, a vertically disposed second linear motor, and a clamping mechanism, the linear motor comprises a rail portion and a sliding portion slidably connected to the rail portion, the second linear motor comprises a second rail portion fixedly connected to the sliding portion and a second sliding portion slidably connected to the second rail portion, the clamping mechanism comprises a bottom plate fixedly connected to the second sliding portion, two chucks slidably connected to the bottom plate, a gear located between the two chucks, and a motor located on the bottom plate and used for rotating the gear, a groove for embedding a flange is provided on one side of each chuck close to the other chuck, a rack is fixedly connected to one side of each chuck close to the other chuck, and the rack of one chuck is engaged with the upper side of the gear, the rack of the other chuck is engaged on the lower side of the gear.

5. The gas generator vacuum-pumping helium-injecting device for an airbag according to claim 4, wherein the collet comprises a slider slidably connected to the bottom plate, a support rod fixedly connected to a side of the slider away from the bottom plate, and a clamping block fixedly connected to a side of the support rod away from the slider, the groove is located on the clamping block, and the rack is fixedly connected to the slider.

6. The gas generator vacuum-pumping helium-injecting device for an airbag according to claim 2, 3, 4 or 5, wherein the lifting mechanism comprises a top plate located above the upper cavity, a second support for supporting the top plate, an electric cylinder fixedly connected to the top plate, a lifting plate located below the top plate and connected to the electric cylinder, and a guide rod penetrating the top plate and slidably connected to the top plate, wherein the bottom end of the guide rod is connected to the lifting plate, and the upper cavity is fixedly connected to the lifting plate.

7. The gas generator vacuumizing helium injection device for an airbag according to claim 3, wherein an assembling mechanism for assembling the gas generator is provided at one side of the lower cavity, the assembling mechanism comprises a supporting ring for embedding the lower cover and dragging the flange around the lower cover, a supporting column for supporting the supporting ring, and a correlation sensor for detecting the assembling accuracy of the upper cover and the lower cover, and a second groove for embedding the flange into the groove is provided on the supporting ring.