Anti-explosion structure and packaging and transportation device for automobile safety airbag gas generator

Abstract

The present invention discloses an anti-explosion structure for a gas generator of an automobile safety airbag, comprising at least one threading point installed on the gas generator; the gas generator is restricted by the at least one threading point. And a packaging and transportation device for the anti-explosion structure for the gas generator of an automobile safety airbag, comprising a packaging box, a support frame and a connecting rope; the packaging box is provided with a support frame; a plurality of gas generators are installed side by side on the support frame; the gas generator is provided with a plurality of threading points; the connecting rope is connected in series with each threading point on the plurality of gas generators and then closed. The present invention has the characteristics that a single gas generator has a restrictive effect, and when a plurality of gas generators are connected in series, the gas generators are restrained to prevent the ejected objects and the burning objects attached to the ejected objects from being thrown outward.

Description

Technical Field

[0001] The invention relates to a transport packaging device, in particular to an anti-explosion structure and a packaging and transport device for a gas generator of an automobile safety airbag. Background Art

[0002] The airbag is a type of safety device, mainly composed of a folded airbag, a plastic cover, a metal bracket, a gas generator, a sensor, etc. Its working principle is: the ECU receives the sensor signal and detects that the speed change exceeds the preset value. After comprehensive analysis and judgment from all aspects, it sends an ignition command to the SRS inflator. The gas-generating agent in the ignition device explodes after ignition, generating nitrogen that quickly fills the open airbag. The new airbag also uses a hybrid gas generator containing compressed gas.

[0003] Because airbags and their gas generators may have dangerous properties such as explosion and compressed gas, their packaging must meet the relevant requirements of the Orange Book (United Nations Recommendations on the Transport of Dangerous Goods) and be tested in the Small Orange Book (United Nations Recommendations on the Transport of Dangerous Goods, Standards and Test Manual) to determine their hazard category.

[0004] Airbags can have multiple classifications and UN numbers based on test results: such as UN0503 safety device, pyrotechnic material, Class 1 explosives, item 1.4G; UN3268 safety device, electrically activated, Class 9 miscellaneous dangerous goods; UN3538 articles containing non-flammable, non-toxic gas, not otherwise specified, Class 2 gas, item 2.2, etc. Different test results are closely related to their structure. Some airbags only contain gas generating powder, some only contain compressed gas, and some contain both gas generating powder and compressed gas. Therefore, the UN number and formal shipping name should be determined based on the structural characteristics of the airbag and the test results of UN6c.

[0005] Among these classifications, UN3268 Safety device, electrically started, Class 9 Miscellaneous Dangerous Goods has the least danger and the lowest transportation cost.

[0006] UN6c test - external fire (bonfire) test The standard for determining the hazard classification level is: if there is an overall explosion phenomenon, it is classified as Class 1, Item 1.1; if there is no overall explosion phenomenon, but the verification screen is perforated or the kinetic energy of the metal projectile exceeds 20J, it is classified as Class 1, Item 1.2; if there is no situation that the product is classified into Item 1.1 or Item 1.2, but a fireball extends out of the verification screen or the burning material flies out of 15m or the heat radiation per 100kg at 15m is greater than 4kw / m 2, classified as Class 1, Item 1.3; if there is no situation that would classify the product into Item 1.1 or Item 1.2 and Item 1.3, but a fireball or flame extends beyond the flame by 1m, or the burning object flies out by 5m, or the verification screen has a dent greater than 4mm, or the kinetic energy of the metal projectile exceeds 8j, or the heat radiation of the combustion is greater than 4kw / m per 100kg at 5m 2 , classified as Class 1, Division 1.4; if the product is not classified into Divisions 1.1, 1.2, 1.3 and 1.4, it shall be classified into Division 1.4s of Class 1. If the article is not manufactured to produce actual explosion or pyrotechnic effects, it shall be excluded from Class 1 explosives according to the relevant provisions of the Orange Book (United Nations Recommendations on the Transport of Dangerous Goods) and may be classified as Class 9 dangerous goods.

[0007] It can be seen from this that if the airbag and its gas generator are to be successfully classified as UN3268 safety device, electrically started, Class 9 miscellaneous dangerous goods, its combustion products, projections, flames or fireballs, thermal radiation and other indicators must be controlled in the 6C test, and according to Special Provisions 280 of the Orange Book UN3268, no shell rupture shall occur in the 6C test.

[0008] In order to control the dangerous effects of airbags and their gas generators, there are currently two common methods. One is to change the product structure and reduce the amount of medicine to reduce the kinetic energy when it is ejected; the other is to reinforce the packaging and install an iron cage inside the packaging to control the burning and ejected materials. (Yan Chun, Cui Yunxiao, et al., Improvement and exploration of passenger airbag factory packaging, "Packaging Engineering", 2019, 40(23): 124-129; Yan Chun, You Lanhua, et al., Research on improvement of dangerous goods packaging for passenger airbags, "Popular Science and Technology", 2019, 21(237): 146-148) This technology is the closest to the existing technology.

[0009] At present, both methods have defects. The first method reduces the amount of medicine, which will cause the various product standards of automobile airbags to fail to meet the design requirements. Although the second method is good, the iron cage is expensive to make and its weight is large, which increases the transportation cost and is not conducive to promotion. Summary of the invention

[0010] The purpose of the present invention is to provide an anti-explosion structure and a packaging and transportation device for an automobile safety airbag gas generator in view of the defects of the prior art.

[0011] In order to achieve the above-mentioned purpose of the present invention, the following technical scheme is adopted:

[0012] An anti-explosion structure for a gas generator of an automobile safety airbag comprises a connecting cable and at least one cable penetration point installed on the gas generator; the connecting cable restricts and fixes the gas generator through at least two cable penetration points.

[0013] Working principle:

[0014] The connecting rope is used to limit and fix the gas generator through at least two rope penetration points on the gas generator. Under the limiting effect of the rope penetration points and the connecting rope, when the gas generator encounters fire, combustion and explosion, no ejected objects and burning objects attached to the ejected objects will be thrown outward.

[0015] As a further improvement of the technical solution, the connecting rope connects at least two gas generators in series through a rope passing point, and after the series connection, the two ends of the connecting rope are fixedly connected.

[0016] As a further improvement of the technical solution, the anti-explosion structure of an automobile airbag gas generator of the present invention also includes a wire-through piece; the wire-through point is a surplus thread on the gas generator; the wire-through piece and the surplus thread are threadedly connected; wherein the connecting rope is connected in series with at least one wire-through piece on each of at least two gas generators to form a closed and fixed connection.

[0017] As a further improvement of the technical solution, the cable insertion member includes a cable insertion ring and a support; the cable insertion ring is arranged on the support; and the support is threadedly connected to the surplus thread.

[0018] As a further improvement of the technical solution, the cable threading member includes a cable body, a socket and a cable hole; the socket is opened along the axis of the cable body, and the socket is provided with an internal thread, and the socket and the surplus thread are threadedly connected; the cable hole is opened on the side of the cable body and passes through the cable body, and is used for the connecting cable to pass through and connect.

[0019] As a further improvement of the technical solution, the cable insertion point is at least one through hole on the gas generator; then, the connecting cable passes through at least one through hole on each of at least two gas generators to connect the at least two gas generators in series.

[0020] As a further improvement of the technical solution, the anti-explosion structure of the automobile airbag gas generator of the present invention also includes a lock buckle; the lock buckle is used to lock the connecting rope to close the connection.

[0021] A packaging and transportation device for the anti-explosion structure of the above-mentioned automobile airbag gas generator also includes a packaging box and a support frame; the support frame is installed in the packaging box; a plurality of gas generators are installed side by side on the support frame; wherein each of the plurality of gas generators is restricted to the support frame through a cable insertion point; or, the connecting cable passes through the respective cable insertion points on the plurality of gas generators to connect the plurality of gas generators in series, and after the series connection, the two ends of the connecting cable are fixedly connected.

[0022] As a further improvement of the technical solution, the support frame includes multiple anti-collision plates, cells, U-shaped grooves and support pads; the multiple anti-collision plates are crisscrossed to form multiple cells; U-shaped grooves are opened on the sides of the cells; and support pads are provided on the tops of the connections between the cells.

[0023] As a further improvement of the technical solution, the support frame includes an end face bracket, an intermediate bracket, a limiting rod and a support rod; an end face bracket is installed at each end of the intermediate bracket; the support rod is arranged on the intermediate bracket, and a plurality of limiting rods are arranged at intervals on the support rod.

[0024] As a further improvement of the technical solution, an anti-explosion structure of an automobile airbag gas generator of the present invention also includes a wire threading piece; the wire threading point is a surplus thread on the gas generator; the wire threading piece and the surplus thread are threadedly connected.

[0025] As a further improvement of the technical solution, the cable insertion member includes a cable insertion ring and a support; the cable insertion ring is arranged on the support; and the support is threadedly connected to the surplus thread.

[0026] As a further improvement of the technical solution, the cable threading member includes a cable body, a socket and a cable hole; the socket is opened along the axis of the cable body, and the socket is provided with an internal thread, and the socket and the surplus thread are threadedly connected; the cable hole is opened on the side of the cable body and passes through the cable body, and is used for the connecting cable to pass through and connect.

[0027] As a further improvement of the technical solution, the cable threading point is a through hole on the gas generator.

[0028] As a further improvement of the technical solution, the anti-explosion structure of the automobile airbag gas generator of the present invention also includes a lock buckle; the lock buckle is used to lock the connecting rope to close the connection.

[0029] As a further improvement of the technical solution, the lock buckle is any one of a U-shaped clip, a lead seal buckle, an eight-shaped buckle or a butterfly buckle.

[0030] As a further improvement of the technical solution, the support frame includes multiple anti-collision plates, cells, U-shaped grooves and support pads; the multiple anti-collision plates are crisscrossed to form multiple cells; U-shaped grooves are opened on the sides of the cells; and support pads are provided on the tops of the connections between the cells.

[0031] The present invention has significant improvements over the prior art:

[0032] 1. The present invention restricts the gas generator through the cable penetration point on the gas generator. When the restricted gas generator burns and explodes, no projectiles and burning materials attached to the projectiles will be thrown outward.

[0033] 2. The present invention uses a connecting rope to connect at least two gas generators in series, and utilizes the characteristic that multiple gas generators will not explode at the same time, and distributes the kinetic energy of one gas generator when it explodes to the remaining multiple gas generators, thereby restraining a single gas generator and preventing the projectiles and the burning materials attached to the projectiles from being thrown outward.

[0034] 3. The cable insertion point of the present invention uses the redundant threads on the metal bracket of the gas generator. The number of the redundant threads can be multiple, and the number of connections between the cable insertion piece and the redundant threads is one or two; the cable insertion piece can facilitate the connection of the cable to connect the gas generators in series. The cable insertion point can reasonably utilize the redundant threads on the gas generator of the airbag, and the function of the airbag will not be damaged after packaging.

[0035] 4. The cable insertion point of the present invention can be a through hole on the metal bracket on the gas generator that is not equipped with screws. There are multiple through holes, which can provide convenience for connecting the gas generators in series with the connecting cable.

[0036] 5. All parts involved in the present invention are standard parts sold on the market, which greatly reduces the cost of use.

[0037] 6. In the present invention, both the fixing and later disassembly work can be performed using electric tools, which greatly saves labor costs.

[0038] 7. The overall cost of the present invention is less than 50 yuan, the price is cheap, and it is conducive to promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0040] Figure 1 This is a schematic structural diagram of a packaging device for an automobile safety airbag gas generator according to the present invention;

[0041] Figure 2 This is a schematic diagram of the structure of the packaging box and the support frame installed in the present invention;

[0042] Figure 3 It is a structural schematic diagram of the support frame of the present invention;

[0043] Figure 4 This is a schematic diagram of the structure of multiple gas generators connected in series using connecting cables according to the present invention;

[0044] Figure 5A gas generator for a vehicle safety airbag is provided with a threading point, a threading member is installed on the threading point, and the threading point is a structural schematic diagram of a threaded structure;

[0045] Figure 6 A gas generator for a car airbag is provided with a cable insertion point, which is a structural schematic diagram of a through-hole structure

[0046] Figure 7 A structural schematic diagram of a cable threading member;

[0047] Figure 8 Another structural schematic diagram of a cable threading member;

[0048] Fig. 9 It is a structural schematic diagram of another structure of the support frame of the present invention;

[0049] Fig.10 for Fig. 9 A schematic diagram of the structure of the support frame for installing the gas generator;

[0050] Fig.11 A schematic diagram of an explosion test for the present invention;

[0051] Fig.12 It is a schematic diagram after the explosion test of the present invention is completed;

[0052] Fig.13 A schematic diagram of a residual sample after the explosion test of the present invention;

[0053] Fig.14 This is a schematic diagram comparing the front and back sides of screen No. 1 used in the explosion test of the present invention before and after the explosion test;

[0054] Fig.15 This is a schematic diagram comparing the front and back sides of the No. 2 screen used in the explosion test of the present invention before and after the explosion test;

[0055] Fig.16 This is a schematic diagram comparing the front and back sides of the No. 3 screen used in the explosion test of the present invention before and after the explosion test;

[0056] Fig.17 For comparison with test A, each gas generator in this test group is placed separately in a packaging box, and there is no connection between the gas generators. Schematic diagram of the explosion test of the test group;

[0057] Fig.18 This is a schematic diagram after the explosion test for comparison test A;

[0058] Fig.19 This is a schematic diagram comparing the front and back sides of screen No. 1 used in the explosion test before and after the explosion test for comparison test A;

[0059] Fig. 20 This is a schematic diagram comparing the front and back sides of the No. 2 screen used in the explosion test before and after the explosion test for comparison test A;

[0060] Fig.21 This is a schematic diagram comparing the front and back sides of the No. 3 screen used in the explosion test before and after the explosion test for comparison test A;

[0061] Fig. 22 For comparison with Test A, there is a schematic diagram of metal projectiles flying out of the explosion test site; after measurement, the metal projectile flew out 60.8 meters from the explosion test center, the mass of the metal projectile was about 434.7g, and the kinetic energy of the metal projectile exceeded 20J;

[0062] Fig.23 For comparison with test B, an iron cage is installed in the test group, and each gas generator is placed separately in the iron cage, and there is no connection between the gas generators. Schematic diagram of the test group performing an explosion test;

[0063] Fig.24 Schematic diagram of the explosion test performed by the test group for comparison with test B;

[0064] Fig.25 This is a schematic diagram after the explosion test for comparison test B;

[0065] Fig.26 This is a schematic diagram comparing the front and back sides of screen No. 1 used in the explosion test before and after the explosion test for comparison test B;

[0066] Fig. 27 This is a schematic diagram of the front and back of the No. 2 screen used in the explosion test before and after the explosion test for comparison test B;

[0067] Fig.28 This is a schematic diagram of the front and back of the No. 3 screen used in the explosion test before and after the explosion test for comparison test B;

[0068] Fig.29 For comparison with Test B, there is a schematic diagram of the metal projectile flying out of the explosion test site; after measurement, the metal projectile flew 8.45 meters away from the center of the explosion test, the mass of the metal projectile was about 570.7g, and the kinetic energy of the metal projectile exceeded 8J;

[0069] Names and serial numbers of components in the figure:

[0070] 1-packing box, 2-gas generator, 3-locking buckle, 4-connecting rope, 5-rope threading piece, 51-rope threading ring, 52-support, 53-rope body, 54-jack, 55-rope hole, 6-rope threading point, 7-support frame, 71-anti-collision plate, 72-cell, 73-U-shaped notch, 74-support pad, 75-end bracket, 76-middle bracket, 77-limiting rod, 78-support rod. DETAILED DESCRIPTION

[0071] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present application.

[0072] Embodiment 1:

[0073] like Figures 1 to 29 As shown, a gas generator for an automobile safety airbag includes a connecting cable 4 and at least one cable insertion point 6 installed on the gas generator 2; the connecting cable 4 restricts and fixes the gas generator 2 through the at least two cable insertion points 6.

[0074] The gas generators 2 are placed individually and independently, and there is no connection between them. The gas generators 2 are also not fixedly connected to the packaging box used for packaging. When burning or exploding, the gas generators 2 are not restrained, and ejected objects, burning objects, and metal objects are thrown out.

[0075] The present invention has the following ways to constrain the gas generator:

[0076] Method 1: The gas generator 2 is restricted to the packaging box used for transportation through the cable point 6. Each gas generator in the packaging box is restricted and connected to the packaging box. Therefore, each gas generator and the packaging box form a connected whole. When the airbag burns and explodes, each gas generator is restrained by the packaging box, so that each gas generator is restrained by the packaging box, so that no burning material is thrown out. The residues of the combustion and explosion of the gas generator are confined to the combustion and explosion site.

[0077] Method 2: Two or more gas generators are connected in series, so that the gas generators are constrained, so when the gas generator explodes, no burning material is thrown out. The residues of the gas generator combustion and explosion are confined to the combustion and explosion site.

[0078] The number of the cable insertion points provided on the gas generator is 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, etc. At least one cable insertion point on the gas generator is restricted.

[0079] Embodiment 2:

[0080] Compared with the embodiment 1, the difference lies in that a restriction method between the gas generators is provided, and a connecting rope 4 is added.

[0081] like Figure 1 and 4 As shown, the connecting rope 4 connects at least two gas generators 2 in series through the rope passing point 6, and after the series connection, the two ends of the connecting rope 4 are fixedly connected.

[0082] The number of gas generators 2 installed is generally 2, 4, 6, 8, 10 or 12.

[0083] The connecting cable 4 is flexible and high temperature resistant. The surface of the connecting cable 4 is wrapped with a protective cover. The protective cover prevents friction from damaging all accessories on the airbag.

[0084] Serial connection method:

[0085] The number of cable passing points of the connecting cable 4 passing through each gas generator 2 is more than one, so that each gas generator is connected in series through the connecting cable. After the connection in series, the two ends of the connecting cable are fixedly connected.

[0086] Working method:

[0087] The connecting rope 4 connects at least two gas generators 2 in series. Under the action of the connecting rope 4, the gas generators are restrained from each other.

[0088] At least two gas generators are connected in series. When a fire occurs, the possibility of multiple gas generators exploding at the same time during the burning process is almost zero. In addition, there are many air holes on the gas generator module. When the internal gas-producing agent burns and explodes, the pressure can be released, so that the shell will not be broken. The danger comes from the shell itself being thrown outward when the gas-producing agent inside the gas generator explodes and releases gas due to heat, forming projectiles. Sometimes these projectiles are also hung with the burning chemical fiber airbag bags that are ejected, becoming combustion products. The present invention connects multiple gas generators in series through connecting ropes, and uses the characteristic that multiple gas generators will not explode at the same time to distribute the kinetic energy of a gas generator when it explodes to the remaining multiple gas generators, thereby achieving the control of a single gas generator, limiting the projectiles and the combustion products attached to the projectiles from being thrown outward, thereby achieving the purpose of reducing the danger level of the safety airbag.

[0089] Embodiment 3:

[0090] Compared with the embodiment 1 or 2, the difference lies in that: a structural form of the cable insertion point is provided and a cable insertion member is additionally installed, so that the cable insertion member is convenient for connecting the cable to connect the gas generators in series.

[0091] like Figure 1 and 5 As shown, the cable insertion point 6 is a surplus thread on the gas generator 2; the cable insertion member 5 is threadedly connected to the surplus thread; wherein the connecting cable 4 is connected in series with at least one cable insertion member 5 on at least two gas generators 2 and then closed and fixedly connected.

[0092] The redundant threads on the gas generator can be screws on the metal bracket on the gas generator. The redundant threads have multiple, such as 1, 2, 3, 4, 5 or 6.

[0093] The number of connections between the threading member 5 and the surplus thread is more than one, and the number of connections is generally 1, 2 or 3. The threading member 5 can provide serial connection convenience for the connecting cable 4; at least one threading member is installed on each gas generator 2. When the gas generators need to be connected in series, the threading members on the gas generators are connected in series by using the connecting cable, so that multiple gas generators can be connected in series.

[0094] Embodiment 4:

[0095] Compared with the third embodiment, the difference lies in that a structural form of the cable threading member is provided.

[0096] like Figure 6 As shown, the cable insertion member 5 includes a cable insertion ring 51 and a support 52; the cable insertion ring 51 is arranged on the support 52; and the support 52 is threadedly connected to the surplus thread.

[0097] The support 52 is threadedly connected with the surplus thread, thereby achieving a fixed support.

[0098] The cable-threading switch 51 is in a circular ring structure, which can facilitate the penetration of the connecting cable, thereby facilitating the serial connection of the gas generators.

[0099] Embodiment 5:

[0100] Compared with the third embodiment, the difference lies in that another structural form of the cable threading member is provided.

[0101] like Figure 7 As shown, the cable threading member 5 includes a cable body 53, a socket 54 and a cable hole 55; the socket 54 is opened along the axis of the cable body 53, and the socket 54 is provided with an internal thread, and the socket 54 and the surplus thread are threadedly connected; the cable hole 55 is opened on the side of the cable body 53 and penetrates the cable body 53, which is used for the connecting cable 4 to pass through and connect.

[0102] The cable body 53 is threadedly connected with the surplus thread through the insertion hole 54, so as to fix the cable body 53.

[0103] The cable hole 55 can provide convenience for the connection cable to penetrate. When the gas generators are connected in series, the connection cable needs to be penetrated through the cable holes 55 on the gas generators to realize the connection of the gas generators in series.

[0104] Embodiment 6:

[0105] Compared with any one of embodiments 1-3, the difference lies in that another structural form of the cable threading point is provided.

[0106] like Figure 6 As shown, the cable point 6 is at least one through hole on the gas generator 2; then, the connecting cable 4 passes through at least one through hole on each of at least two gas generators 2 to connect the at least two gas generators 2 in series. After the connection, the two ends of the connecting cable are fixedly connected.

[0107] The through hole is a through hole provided on the upper bracket of the gas generator for installing screws.

[0108] The number of the through holes is multiple, such as 1, 2, 3, 4, 5, 6 or 8.

[0109] Embodiment 7:

[0110] Compared with any one of the embodiments 2-6, the difference is that a lock buckle 3 is additionally installed. The lock buckle is used to facilitate the closing and connection of the two ends of the connecting rope.

[0111] like Figure 1 and 4 As shown, the lock buckle 3 is used to lock the connection rope 4 to close the connection. The lock buckle can facilitate the closed connection of the two ends of the connection rope. Thus, the series-connected gas generators can form a series-connected whole. This is more conducive to limiting the explosion of each gas generator.

[0112] Embodiment 8:

[0113] Compared with Example 7, the difference lies in that a structural form of the lock is provided.

[0114] The lock buckle 3 is a U-shaped clamp. After the connecting rope 4 connects the gas generators 2 in series, the two ends of the connecting rope are fixed by using the U-shaped clamp.

[0115] Embodiment 9:

[0116] Compared with Example 7, the difference is that another structural form of the lock is provided.

[0117] The lock buckle 3 is a lead seal buckle. After the connecting rope 4 connects the gas generators 2 in series, the two ends of the connecting rope are fixed by the lead seal buckle.

[0118] Embodiment 10:

[0119] Compared with Example 7, the difference is that another structural form of the lock is provided.

[0120] The lock buckle 3 is an eight-shaped buckle. One end of the connecting rope is connected to one end of the eight-shaped buckle, and the other end of the connecting rope passes through each gas generator, so that the connecting rope connects each gas generator in series; and the other end of the connecting rope is connected to the other end of the eight-shaped buckle.

[0121] Embodiment 11:

[0122] Compared with Example 7, the difference is that yet another structural form of the lock is provided.

[0123] The lock buckle 3 is a butterfly buckle. After the connecting rope 4 connects the gas generators 2 in series, the two ends of the connecting rope are fixed by the butterfly buckle.

[0124] Embodiment 12:

[0125] A packaging and transportation device for the anti-explosion structure of the automobile airbag gas generator described in any one of the above embodiments 1 to 11, comprising a packaging box 1 and a support frame 7; the support frame 7 is installed in the packaging box 1; a plurality of gas generators 2 are installed side by side on the support frame 7; wherein the gas generator 2 is restricted to the support frame 7 by a rope insertion point 6; and / or the connecting rope 4 passes through the rope insertion point 6 on each gas generator 2 to connect the plurality of gas generators 2 in series, and after the series connection, the two ends of the connecting rope 4 are fixedly connected.

[0126] Installation and connection structure of gas generator:

[0127] One is a connection structure between the gas generator and the supporting frame:

[0128] A plurality of gas generators are mounted on the support frame, and each gas generator is fixedly connected to a restriction. Therefore, the plurality of gas generators and the support frame constitute an integral connection structure, and each gas generator is restrained by the support frame. Therefore, when a fire occurs and one of the gas generators explodes, due to the restraint of the support frame and the remaining gas generators, no projectiles and burning materials attached to the projectiles will be thrown outward during the explosion.

[0129] The second is the connection structure between the connecting rope and multiple gas generators:

[0130] The connecting rope 4 penetrates through the rope points 6 on each gas generator 2 to connect the multiple gas generators 2 in series, and after the series connection, the two ends of the connecting rope 4 are fixedly connected. After the two ends of the connecting rope are fixedly connected, when a gas generator among the multiple gas generators explodes, the multiple gas generators will not explode at the same time, and the exploded gas generator is restricted by the remaining gas generators through the connecting rope, and will not be thrown out when it explodes.

[0131] Third, the gas generator adopts the connection structure of the cable point and the connecting cable:

[0132] A plurality of gas generators are installed on the support frame, each gas generator is fixedly connected to the restriction, and then the gas generators are connected in series by a connecting rope, so as to strengthen the restriction effect on the gas generator.

[0133] Embodiment 13:

[0134] Compared with Example 12, the difference is that a structural form of the supporting frame is provided.

[0135] like Figure 3 As shown, the support frame 7 includes a plurality of anti-collision plates 71, cells 72, U-shaped notches 73 and support pads 74; the plurality of anti-collision plates 71 are crisscrossed to form a plurality of cells 72; a U-shaped notch 73 is provided on the side of the cell 72; and a support pad 74 is provided on the top of the connection between each cell 72.

[0136] The unit cell 72 is used to place the gas generator 2 .

[0137] The U-shaped notch 73 is used to insert or remove the gas generator into the cell 72 .

[0138] The support pad 74 can provide support to the top of the packaging box to prevent the gas generator in the cell from being squeezed during stacking installation.

[0139] Embodiment 14:

[0140] Compared with the embodiment 13, the difference lies in that a structural form of the anti-collision plate 71 and the support pad 74 is provided.

[0141] The anti-collision plate 71 and the support pad 74 are made of foam board, which have a buffering effect, and prevent the anti-collision plate from blocking the gas generator from hitting the box body of the box when the box shakes during transportation or handling, thereby protecting the gas generator.

[0142] Embodiment 15:

[0143] Compared with any one of Example 12, the difference is that another structural form of the support frame is provided.

[0144] like Fig. 9 As shown, the support frame 7 includes an end face bracket 75, an intermediate bracket 76, a limiting rod 77 and a support rod 78; an end face bracket 75 is installed at each end of the intermediate bracket 76, and the support rod 78 is arranged on the intermediate bracket 76, and a plurality of limiting rods 77 are arranged at intervals on the support rod 78.

[0145] The diameter of each rod of the support frame is selected to be 2mm to overcome burning damage.

[0146] The plurality of gas generators 2 form an integral connection structure with the support frame 7 via the limiting rod 77, and the gas generators are limited to each other by the support frame.

[0147] The limiting rod 77 is connected to the through hole on the gas generator 2. The gas generator 2 is sleeved on the limiting rod 77 through the through hole thereon, so that the limiting rod 77 will limit the gas generator 2 on the support frame 7, thereby constraining the gas generator. When the gas generator burns and explodes, the exploded gas generator is restricted by the unexploded gas generator and the support frame, and no projectiles and burning materials attached to the projectiles will be thrown out.

[0148] Embodiment 16:

[0149] Compared with any one of Examples 2-15, the difference is that a protective cover is added.

[0150] The surface of the connecting cable 4 is wrapped with a protective cover, which prevents friction from damaging all accessories on the airbag.

[0151] The connecting rope 4 has a flexible structure and is resistant to high temperatures.

[0152] Experimental comparison:

[0153] The present invention, comparative test A and comparative test B were subjected to explosion tests.

[0154] The explosion test conducted by the present invention shows that Figure 8-13 During the test, the following phenomena were observed:

[0155] (1) Flames extend beyond 5m from the flame boundary;

[0156] (2) No burning material flies beyond 5 m from the package boundary;

[0157] (3) No metal projectiles with kinetic energy exceeding 8 J were found;

[0158] (4) Compare the test results before and after to verify that the screen has no perforations or dents larger than 4 mm.

[0159] Based on the test results, the transportation hazard level of the present invention excludes Class 1. Safe transportation can be achieved.

[0160] Comparative test A explosion test shows Figure 14-19 During the test, the following phenomena were observed:

[0161] (1) Flames extend beyond 5m from the flame boundary;

[0162] (2) No burning material flies beyond 5 m from the package boundary;

[0163] (3) Several metal projectiles were found, one of which had a mass of about 434.7 g and flew 60.8 meters from the test center. The kinetic energy of the metal projectiles exceeded 20 J (such as Fig.19 );

[0164] (4) Compare the test results before and after to verify that the screen has no perforations or dents larger than 4 mm.

[0165] Based on the test results, the transport hazard level of comparative test A is Class 1 and the category is 1.2.

[0166] Comparative test B explosion test shows Figure 20-26 During the test, the following phenomena were observed:

[0167] (1) Flames extend beyond 5m from the flame boundary;

[0168] (2) No burning material flies beyond 5 m from the package boundary;

[0169] (3) Several metal projectiles were found, one of which had a mass of about 570.7 g and flew 8.45 meters from the test center. The kinetic energy of the metal projectiles exceeded 8 J (such as Fig.26 );

[0170] (4) Compare the test results before and after to verify that the screen has no perforations or dents larger than 4 mm.

[0171] Based on the test results, the transport hazard level of comparative test B is Class 1, Division 1.4, non-S compatibility group.

[0172] Through observation of the residues after burning, it was found that the metal gas generator shell remained intact, while the airbag, plastic decorative cover and 1mm thick metal bracket all had varying degrees of damage. However, the 2mm thick gas generator shell and the screws and nuts connecting the metal bracket could withstand the high temperature of the fire and the collision during the explosion, and remained intact after burning.

[0173] According to the above test, it can be concluded that multiple gas generators in the same packaging box will not explode at the same time.

[0174] According to the comparison of the above test results, it can be seen that the present invention connects the gas generators in the packaging box in series by connecting ropes. When a fire occurs in the packaging box, during the combustion process, the gas generators are connected in series by connecting ropes, and the gas generators will not explode at the same time during the combustion process. Instead, the kinetic energy of the explosion of one gas generator is distributed to the remaining multiple gas generators, thereby achieving the restraint of a single gas generator, preventing the generation of projectiles and burning materials attached to the projectiles, thereby achieving the purpose of reducing the hazard level of the airbag.

[0175] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the protection scope of the invention.

Claims

1. An anti-explosion structure for an automobile airbag gas generator, Features: It comprises a connecting rope (4) and at least one rope penetration point (6) installed on a gas generator (2); the connecting rope (4) is used to restrict and fix the gas generator (2) via at least two rope penetration points (6); It also includes a cable insertion piece (5); the cable insertion point (6) is a surplus thread on the gas generator (2); the cable insertion piece (5) and the surplus thread are threadedly connected; wherein the connecting cable (4) is connected in series with at least one cable insertion piece (5) on each of at least two gas generators (2) to form a closed and fixed connection; The cable insertion member (5) comprises a cable insertion ring (51) and a support (52); the cable insertion ring (51) is arranged on the support (52); the support (52) and the surplus thread are threadedly connected; The cable threading member (5) further comprises a cable body (53), an insertion hole (54) and a cable hole (55); the insertion hole (54) is opened along the axis of the cable body (53), and the insertion hole (54) is provided with an internal thread, and the insertion hole (54) is threadedly connected to the surplus thread; The cable hole (55) is opened on the side of the cable body (53) and penetrates the cable body (53), and is used for the connecting cable (4) to penetrate and connect.

2. The anti-explosion structure of the automobile airbag gas generator according to claim 1, Features: The cable insertion point (6) is at least one through hole on the gas generator (2); the connecting cable (4) passes through at least one through hole on each of the at least two gas generators (2) to connect the at least two gas generators (2) in series.

3. The anti-explosion structure of the automobile airbag gas generator according to claim 1 or 2, Features: It also comprises a lock buckle (3); the lock buckle (3) is used to lock the connecting rope (4) to close the connection.

4. A packaging and transportation device for the anti-explosion structure of the automobile airbag gas generator according to any one of claims 1 to 3, Features: It also includes a packaging box (1) and a supporting frame (7); A support frame (7) is installed in the packaging box (1); A plurality of gas generators (2) are mounted side by side on the support frame (7); Wherein, each of the plurality of gas generators (2) is restricted to a support frame (7) via a cable penetration point (6).

5. The packaging and transportation device of the anti-explosion structure of the automobile safety airbag gas generator according to claim 4, Features: The support frame (7) comprises a plurality of anti-collision plates (71), cells (72), U-shaped notches (73) and support pads (74); The plurality of anti-collision plates (71) are intersected in a vertical and horizontal manner to form a plurality of cells (72); A U-shaped notch (73) is provided on the side of the cell (72); A support pad (74) is provided on the top of the connection between each unit cell (72).

6. The packaging and transportation device of the anti-explosion structure of the automobile safety airbag gas generator according to claim 4, Features: The support frame (7) comprises an end face support (75), an intermediate support (76), a limiting rod (77) and a support rod (78); An end face bracket (75) is mounted on each end of the intermediate bracket (76); The support rod (78) is arranged on the middle bracket (76), and a plurality of limiting rods (77) are arranged at intervals on the support rod (78).

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