CN106828397B - Airbag device and method for manufacturing same - Google Patents
Airbag device and method for manufacturing same Download PDFInfo
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- CN106828397B CN106828397B CN201710028562.0A CN201710028562A CN106828397B CN 106828397 B CN106828397 B CN 106828397B CN 201710028562 A CN201710028562 A CN 201710028562A CN 106828397 B CN106828397 B CN 106828397B
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- cover body
- air bag
- flexible cover
- panel
- airbag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
- B60R21/2176—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together the air bag components being completely enclosed in a soft or semi-rigid housing or cover
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
- B60R2021/23504—Inflatable members characterised by their material characterised by material
- B60R2021/23509—Fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
- B60R2021/23533—Inflatable members characterised by their material characterised by the manufacturing process
- B60R2021/23538—Sewing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Air Bags (AREA)
Abstract
The invention relates to the technical field of passive safety devices of automobiles, in particular to an airbag device and a manufacturing method thereof. Compared with the prior art, the flexible cover body has the advantages that the weight of the flexible cover body is reduced by about 90 percent compared with that of the traditional shell body, the structure is simple, the processing is convenient, and the cost is low. Meanwhile, the flexible cover body has the function of wrapping the film by the air bag, so that the film wrapping parts in the prior art are saved. In addition, the technical scheme of the invention can be directly applied to the design of the conventional air bag, the retainer and the lower mounting part, and the performance of the air bag assembly is equivalent to that of the prior art, so that the air bag assembly is easy to popularize and apply.
Description
Technical Field
The invention relates to the technical field of passive safety devices of automobiles, in particular to an air bag device and a manufacturing method thereof.
Background
Automotive airbags are used to protect occupants within a vehicle during a vehicle collision event. On the secondary driver side, a secondary driver airbag for front collision protection is installed in the instrument panel. The common passenger airbag includes an airbag, a gas generator for inflating the airbag, a housing for accommodating the airbag and the gas generator, an upper mounting portion for mounting and connecting with an upper body of the instrument panel, and a lower mounting portion for mounting and connecting with a cross member of the instrument panel. The common shell is made of metal sheet metal or hard plastic, has large weight and high cost, and does not accord with the technical development trend of light weight and low cost.
A flexible housing for an airbag module is disclosed in the publication CN 101213118A. The housing includes a collar formed of a rigid material for connecting the housing to the vehicle and a chute assembly formed of a flexible material for securing the collar. The chute assembly is secured to the flange to form a housing cavity containing the inflatable cushion. However, this patent still requires the use of a rigid collar structure and the attachment of the collar to the chute assembly is complex, time consuming and costly.
An elastic cover for an airbag module having an outer wall constructed of an elastic material and a bracket designed for attachment to a vehicle is disclosed in publication CN1942346 a. Upon deployment, the cushion is released from the housing through the bracket, the inflator remains in the housing and inflation gas is delivered into the cushion through the housing. However, the cover body, the inflator pump and the instrument board beam are not connected and fixed, the cover body and the inflator pump are not supported enough, and noise is easy to generate during vibration; and gas is flushed into the cushion pad through the cover body, so that the structural design of the cover body and the cushion pad is complex, and the reliability and the applicability are to be verified.
Patent publication No. CN102574496a discloses an airbag device in which an outer bag is sewn from a sheet-like member into a three-dimensional shape having an outer bag side bottom portion and an outer bag side peripheral wall portion standing on the periphery of the outer bag side bottom portion, the outer bag side bottom portion being fixed to an inflator, while the outer bag side peripheral wall portion is fitted so as to surround a folded airbag and be capable of being sandwiched between the inflated and opened airbag and a cover side peripheral wall portion. The patent proposes a solution for the application scenario of an airbag device integrated with an airbag cover, i.e. a slotted instrument panel, but for the application scenario of an airbag cover integrated with an instrument panel, i.e. a seamless instrument panel, the outer bag cannot provide sufficient directional support for the inflation of the airbag during the airbag ignition operation, and there is a risk of the airbag being squeezed out from between the cover side peripheral wall portion and the inflator fixing plate.
Patent publication No. US20120001405A1 discloses an airbag module, the housing of which comprises an airbag cavity made of flexible material for accommodating an airbag, and an airbag cover, also made of flexible material, in combination with the airbag housing, for covering the airbag. However, the airbag case is not connected to the instrument panel upper body, and there is a risk that the airbag is squeezed out from between the flexible case and the instrument panel upper body side wall when the airbag is in a bursting operation. The gas generator support piece adopts flexible material, can't provide sufficient support for gas generator and air bag, thereby there is the risk that gas generator and air bag neck too much downward movement influence the air bag and be full of the package shape at air bag point explosion during operation, and when air bag does not point explosion at ordinary times, there is the risk that air bag vibrates along with the vehicle and produces the noise. In addition, the design of the shell reinforcing member is too complex and costly.
Therefore, it is necessary to design an airbag device having a flexible case with a simple structure and a method for manufacturing the same, which can provide sufficient directional support in the inflation process of an airbag, ensure reliable product performance, eliminate risks such as vibration noise, and simultaneously realize weight reduction and cost reduction.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an air bag device with a flexible shell and a manufacturing method thereof, which have simple structures, can provide enough directional support in the inflation process of an air bag, ensure reliable product performance, eliminate risks such as vibration noise and the like, and realize light weight and cost reduction.
In order to achieve the above object, the present invention is an airbag device comprising an airbag, a gas generator, a flexible cover, a rigid lower mounting portion, and a retainer, characterized in that: the retainer is located inside the air bag, the air bag after compression and folding is placed in the flexible cover body, the flexible cover body wraps the air bag, a weakening line is arranged on the upper surface of the flexible cover body, the upper surface of the flexible cover body is connected with the upper instrument board body, and the lower rigid mounting part is connected between the instrument board beam and the bottom of the flexible cover body.
The studs of the retainer sequentially pass through the air bag, the flexible cover body, the rigid lower mounting part and the gas generator and then are connected with the nuts.
The flexible cover body is by the top panel and four side boards that a slice formula fabric was constituteed, and the front side of top panel, rear side, left side and right side limit are equipped with the convex part respectively, and the convex part surface is equipped with cover body mounting hole, and after the screw passed cover body mounting hole, with instrument board upper body coupling, the below of convex part is equipped with the side board of downwardly extending, adopts the concatenation seam to sew up between two adjacent side boards to form the protruding structure of sewing up, the lower part of side board is equipped with the link hole, and the link hole is hung on the double-screw bolt of holder after inwards buckling of side board.
The convex parts are formed by folding double-layer fabrics along cutting lines and sewing along sewing lines.
The flexible cover body is by the top panel and the side board that a slice formula fabric was constituteed, and the front side of top panel, rear side, left side and right side limit are equipped with the convex part respectively, and the convex part surface is equipped with cover body mounting hole, and after the screw passed cover body mounting hole, with instrument board upper body coupling, the below of front side convex part is equipped with the side board of downwardly extending, and the side board includes four sides, is equipped with the department of cutting between two adjacent sides, adopts the concatenation seam to sew up between two sides of head and tail to form the protruding structure of sewing up, the lower part of side board is equipped with the hitching hole, and the hitching hole is hung on the double-screw bolt of holder after inwards buckling of side board.
The front convex part is formed by folding double-layer fabrics along cutting lines and sewing along sewing lines, and the rear convex part, the left convex part and the right convex part are formed by overlapping an upper panel and a side panel and sewing along the sewing lines.
The cutting lines are alternately arranged by the breaking parts and the lap joint parts, the length of the breaking parts is larger than that of the lap joint parts, and the two ends of the cutting lines are lap joint parts.
The flexible cover body is by the top panel and four side board that rubber or thermoplastic elastomer made, top panel and four side board integrated into one piece, and the front side, the rear side, left side and right side limit of top panel are equipped with the convex part respectively, and the convex part surface is equipped with cover body mounting hole, and after the screw passed cover body mounting hole, with instrument board upper body coupling, the below of convex part is equipped with downwardly extending's side board, four side board end to end, the lower part of side board is equipped with the link hole, the side board inwards buckles the back, the link hole is hung on the double-screw bolt of holder.
The method comprises the following steps: step 1, a retainer is arranged in an air bag, and a stud is exposed from the air bag; step 2, folding the compressed air bag to enable the space volume of the air bag to be equivalent to the cavity space of the flexible cover body; step 3, the folded air bag and the retainer are arranged in the cavity of the flexible cover body; step 4, bending a side panel of the flexible cover body to enable the hanging hole to be hung on the stud; and 5, sleeving the mounting holes of the rigid lower mounting part and the gas generator into the studs in sequence, and screwing nuts into the studs and tightening.
Compared with the prior art, the flexible cover body has the advantages that the weight of the flexible cover body is reduced by about 90 percent compared with that of the traditional shell body, the structure is simple, the processing is convenient, and the cost is low. Meanwhile, the flexible cover body has the function of wrapping the film by the air bag, so that the film wrapping parts in the prior art are saved. In addition, the technical scheme of the invention can be directly applied to the design of the conventional air bag, the retainer and the lower mounting part, and the performance of the air bag assembly is equivalent to that of the prior art, so that the air bag assembly is easy to popularize and apply.
Drawings
Fig. 1 is a schematic sectional view showing an assembly of an airbag device and an instrument panel according to embodiment 1 of the present invention.
Fig. 2 is a schematic view of an airbag device according to embodiment 1 of the present invention.
Fig. 3 is a schematic view of an airbag device according to embodiment 1 of the present invention.
FIG. 4 is a schematic view of a cover, airbag and retainer assembly according to embodiment 1 of the present invention.
Fig. 5 is a schematic view of the natural state of the cover according to embodiment 1 of the present invention.
Fig. 6 is a schematic illustration of a fabric panel prior to seaming for the cover of example 1 of the present invention.
Fig. 7 is a natural state diagram of the cover according to embodiment 2 of the present invention.
Fig. 8 is a schematic view showing the laying of the fabric sheet before the cover body is sewn in example 2 of the present invention.
Fig. 9 is a schematic view illustrating a natural state view of a cover according to embodiment 3 of the present invention.
Fig. 10 is a schematic view of a natural state view angle of a cover according to embodiment 3 of the present invention.
Detailed Description
The invention will now be further described with reference to examples.
Example 1
Referring to fig. 1 and 2, the airbag device in this example includes an airbag, a gas generator, a flexible cover, a rigid lower mounting portion, and a retainer. The retainer 5 is located inside the air bag 3, the compressed and folded air bag 3 is placed in the flexible cover body 1, and the flexible cover body 1 wraps the air bag 3. The instrument panel beam 7a is connected with the bottom of the flexible cover 1 by a rigid lower mounting part 2. The upper surface of the rigid lower mounting part 2 is attached to the bottom of the flexible cover 1, and the lower surface of the rigid lower mounting part 2 is attached to the gas generator 4. The stud bolts 51 of the retainer 5 pass through the air bag 3, the flexible cover 1, the rigid lower mounting part 2 and the gas generator 4 in sequence, and then are connected and fastened with the nuts 6. The rigid lower mounting portion 2 is made of sheet metal, and mounting holes 21 are provided on the rigid lower mounting portion 2 to fix the airbag device to the instrument panel cross member 7a by bolts 8 a.
Referring to fig. 3-5, the flexible cover 1 is made of a flexible material, including a fabric, a single or mixed material sheet having similar characteristics to a fabric, a one-time-fabricable rubber, a thermoplastic elastomer, or other materials having similar characteristics. In this example, the flexible cover 1 is made of a one-piece fabric top panel 11 and four side panels 121, and the top surface of the flexible cover 1, i.e. the top panel 11, is provided with lines of weakness 15. For tearing as the airbag 3 expands during operation, so that the airbag 3 is punched out from the tearing portion.
When not assembled into the airbag device, the flexible cover 1 presents a cavity with 5 closed faces and 1 open face on the main body. Specifically, it consists of an upper panel 11 and four side panels 121. The four side panels 121 are bendable, and can be easily bent by hand during assembly, and automatically return to the original state during disassembly. The front, rear, left and right sides of the upper panel 11 are respectively provided with a convex portion 111, the surface of the convex portion 111 is provided with a plurality of cover mounting holes 111a, the screws 8b pass through the cover mounting holes 111a and then are connected with the instrument panel upper body 7b, and the convex portion 111 is formed by folding a double-layer fabric along a cutting line 961 and sewing along a sewing line 141. The side panels 121 extending downwards are arranged below the convex parts 111, two adjacent side panels 121 are connected into a whole by stitching with stitching lines 131a, and stitching protruding structures 131 are formed at stitching positions, so that the formed flexible cover body 1 is provided with 5 closed surfaces and 1 open surface.
In assembling the airbag device, the following steps are produced: step 1, a retainer 5 is arranged in an air bag 3, and a stud 51 is exposed from the air bag 3; step 2, folding the compressed air bag 3 to enable the space volume of the air bag 3 to be equivalent to the cavity space of the flexible cover body 1; step 3, the folded air bag 3 and the retainer are arranged in the cavity of the flexible cover body 1; step 4, bending the side panel 121 of the flexible cover 1 to enable the hanging hole 121a at the lower part of the side panel 121 to be hung on the stud 51; and 5, sleeving the mounting holes of the rigid lower mounting part 2 and the gas generator 4 into the studs 51 in sequence, and screwing nuts into the studs and tightening to form the complete air bag device.
Referring to fig. 6, the specific forming method of the flexible cover 1 of the present embodiment is: the fabric sheet shown in fig. 6 is cut from a piece of flat fabric. The fabric sheet 9 comprises a center sheet 91 and four ear sheets 921. After folding and stitching, a flexible cover 1 as shown in fig. 5 is formed.
As shown in fig. 6, intermittent cutting lines 961 are provided between the center sheet 91 and the ear sheets 921, and the cutting lines 961 are specifically characterized in that: the breaking parts and the lap parts are alternately arranged, namely a section of breaking parts, a section of lap parts, a section of breaking parts and the like; the length of the breaking portion is much greater than that of the lapping portion, and both ends of the single cutting line 961 are lapping portions, so as to ensure that the ear piece 921 can be folded along the cutting line 961 easily, and after the sewing line 141 is sewn, the edge of the ear piece 921 and the edge of the center piece 91 are still adhered together, that is, the protruding portion 111 is a whole piece in shape.
The central panel 91 is provided with a line of weakness 15 at its middle, similar in character to cut line 961. The weakening line 15 is in this example in the shape of the letter H, but the weakening line 15 can also be designed in other shapes as desired. A plurality of upper mounting holes 911a are formed in the central piece 91 near the cutting line 961, a plurality of lower mounting holes 921a are formed in the lug 921 near the cutting line 961, the number of the lower mounting holes 921a corresponds to that of the upper mounting holes 911a, and the lower mounting holes 921a and the upper mounting holes 911a are symmetrical along the cutting line 961. The lower side edge of the ear piece 921 is provided with two hooking holes 121a, and both ends of the ear piece are provided with extension parts 921c.
In the stitching, the tab 921 is folded along the cut line 961 so that the upper mounting holes 911a and the lower mounting holes 921a are aligned one by one and overlapped. A sewing line 141 is sewn to completely attach the tab 921 to the edge of the center piece 91 to form a flange-like convex portion 111, and the upper mounting hole 911a and the lower mounting hole 921a are aligned and overlapped to form a cover mounting hole 111a. The non-fixing portions of the tabs 921 are turned up along the sewing lines 141 to be erected, the extending portions 921c of the adjacent two tabs 921 are overlapped and spliced, and a spliced sewing line 131a is sewn to be fixed, thereby forming the sewing protrusion structure 131. The upstanding portions of the tabs 921 form the side panels 121 of the flexible enclosure 1 and the central tab 91 forms the upper panel 11 of the flexible enclosure 1, the complete flexible enclosure 1.
When the airbag device is in the explosion operation, the convex part 111 arranged on the flexible cover body 1 and the upper instrument panel body 7b is stressed more, and other parts of the flexible cover body 1 are stressed less. In this embodiment, the two-layer fabric is disposed at the position of the protruding portion 111 with large stress, and the single-layer fabric is disposed at other positions with small stress, so that the strength of the flexible cover body 1 is ensured, and unnecessary cost waste is avoided.
According to the sample test results of example 1, the sewing thread 141 adopts a single needle flat stitch sewing process, the sewing thread adopts a 20# upper thread and a 20# lower thread, and the sewing density adopts 26-32 needles/100 mm; the splicing suture line 131a adopts a sewing process of double-needle flat stitch, the sewing thread adopts a 20# upper thread and a 20# lower thread, the sewing density adopts 26-32 needles/100 mm, the strength can meet the performance requirement, and the sewing cost is low. In addition, the sewing process of splicing the suture 131a and adopting double-needle flat seams at the positions can avoid the risk of loosening of the tail ends of the suture caused by adopting a chain stitch process. In the arrangement of the sewing process, the sewing thread 141 is sewn first, and then the splicing thread 131a is sewn. With the arrangement method, when sewing the suture line 141, the lug 921 can be folded and flattened as required, so that the suture line 141 can be continuously sewn at one time, and the working time required for sewing is reduced.
Compared with the conventional design adopting the rigid cover, because the flexible cover 1 is formed by flexible materials, tolerance accumulation from the upper instrument panel body 7b to the transverse instrument panel beam 7a can be absorbed and contained, internal stress generated in the whole system due to tightening of the bolts 8a and the screws 8b respectively is avoided, and the damage risk of the upper instrument panel body 7b and the installation position of the screws 8b is reduced. At the same time, the flexible cover 1 can block the propagation of vehicle vibrations along the path of the upper instrument panel body 7b, the airbag device, the instrument panel cross member 7a, reducing the risk of noise of the instrument panel system.
The rigid lower mounting part 2 of the invention provides sufficient directional support for the air bag 3 and the gas generator 4, is not only beneficial to ensuring the flushing direction of the air bag 3 when the air bag device works, but also can rigidly fix the gas generator 4, and avoids disordered swinging or noise generation when the vehicle vibrates. The convex part 111 on the flexible cover body 1 is fixedly connected with the upper instrument panel body 7b, so that a powerful support is provided for the upper part of the flexible cover body 1, and disordered expansion of the air bag 3 to the periphery during expansion is avoided. The rigid lower mounting part 2 is connected with the instrument panel beam 7a, so that high-strength support is provided for the gas generator 4, the gas generator 4 is prevented from excessively moving downwards when the safety airbag is in explosion, and meanwhile, the risk of vibration noise is reduced. The cover body of the invention has simple structural design, simple manufacturing process and low cost, and is beneficial to popularization and application.
Example 2
This example only shows differences from example 1, and the same parts as in example 1 will not be repeated.
In this example, the flexible cover 1 is composed of an upper panel 11 and a side panel 121 made of one piece of fabric, the front side, the rear side, the left side and the right side of the upper panel 11 are respectively provided with a convex portion 111, the surface of the convex portion 111 is provided with a cover mounting hole 111a, a screw 8b passes through the cover mounting hole 111a and then is connected with the instrument panel upper body 7b, the front convex portion 111 is formed by folding over a double-layer fabric along a cutting line 961 and sewing along a sewing line 141, and the rear side, the left side and the right side convex portions 111 are overlapped by the upper panel 11 and the side panel 121 and sewing along the sewing line 141. The side panel 121 extending downwards is arranged below the front side convex part 111, the side panel 121 comprises four side surfaces, a cutting part 921e is arranged between two adjacent side surfaces, a splicing suture 131a is adopted for stitching between the front side surface and the rear side surface, a stitching convex structure 131 is formed, a hanging hole 121a is arranged at the lower part of the side panel 121, and after the side panel 121 is bent inwards, the hanging hole 121a is hung on the stud 51 of the retainer 5.
Referring to fig. 7 and 8, the fabric sheet 9 in this embodiment includes a center sheet 91 and ear sheets 921. The ear piece 921 includes four side surfaces, the center piece 91 is connected to only one side surface, a cutting line 961 is provided at the connection between the two side surfaces, a cut portion 921e is provided between the adjacent side surfaces, and extension portions 921c are provided at the end portions of the front and rear side surfaces.
In the stitching, the tab 921 is folded along the cut line 961 so that the upper mounting holes 911a and the lower mounting holes 921a are aligned one by one and overlapped. The sewing thread 141 attaches the tab 921 to the edge portion of the center piece 91 to form the front convex portion 111. The tab 921 is folded over along the seam 141 so as to be perpendicular to the center piece 91. The tab 921 is sequentially folded along the cut portion 921e and the extending direction thereof while the upper mounting holes 911a are aligned one by one with the lower mounting holes 921a, and the sewing thread 141 attaches the tab 921 to the center piece 91 and forms the rear, left, and right protruding portions 111, respectively. Finally, the two extending portions 921c are overlapped and spliced, and a splicing suture 131a is sewn and fixed, so that a stitching protruding structure 131 is formed, and the complete flexible cover body 1 is formed.
The number of the sutures in this example is smaller than that in example 1, and the manufacturing efficiency of the flexible cover 1 can be improved.
Example 3
This example only shows differences from example 1, and the same parts as in example 1 will not be repeated.
In this example, the flexible cover 1 is made of rubber or thermoplastic elastomer and comprises an upper panel 11 and four side panels 121, the upper panel 11 and the four side panels 121 are integrally formed, the front side, the rear side, the left side and the right side of the upper panel 11 are respectively provided with a convex part 111, the surface of the convex part 111 is provided with a cover mounting hole 111a, a screw 8b penetrates through the cover mounting hole 111a and then is connected with the instrument panel upper body 7b, a downward extending side panel 121 is arranged below the convex part 111, the four side panels 121 are connected end to end, a hanging hole 121a is arranged at the lower part of the side panel 121, and after the side panel 121 is bent inwards, the hanging hole 121a is hung on a stud 51 of the retainer 5. The tab 111 has a greater thickness than the four side panels 121 so as to withstand the greater stress of the tab area without wasting material on the less stressed side panels.
Referring to fig. 9 and 10, the flexible cover 1 in the present embodiment is formed by one-time processing of a flexible raw material. The flexible raw material comprises rubber, thermoplastic elastomer or other materials having similar properties. The manufacturing method includes injection molding, hot press molding, or other similar methods. By adopting the technical scheme and the processing method of the embodiment, the cutting and sewing procedures are not needed, and the production and processing efficiency can be improved.
When not assembled, the flexible cover 1 can maintain the natural state as shown in fig. 9 and 10. The four side panels 121 can be easily bent by hand when the airbag device is assembled, and automatically return to the original state when disassembled.
Claims (3)
1. An airbag device comprising an airbag, a gas generator, a flexible cover, a rigid lower mounting portion and a retainer, characterized in that: the retainer (5) is positioned in the air bag (3), the compressed and folded air bag (3) is placed in the flexible cover body (1), the air bag (3) is covered by the flexible cover body (1), a weakening line (15) is arranged on the upper surface of the flexible cover body (1), the upper surface of the flexible cover body (1) is connected with the upper instrument panel body (7 b), and the lower rigid mounting part (2) is adopted between the transverse instrument panel beam (7 a) and the bottom of the flexible cover body (1); the flexible cover body (1) is composed of an upper panel (11) and side panels (121) which are made of one piece of fabric, the front side, the rear side, the left side and the right side of the upper panel (11) are respectively provided with a convex part (111), the surface of the convex part (111) is provided with a cover body mounting hole (111 a), a screw (8 b) penetrates through the cover body mounting hole (111 a) and then is connected with an instrument panel upper body (7 b), a side panel (121) which extends downwards is arranged below the front convex part (111), the side panel (121) comprises four side surfaces, a cutting part (921 e) is arranged between two adjacent side surfaces, a splicing seam (131 a) is adopted between the two side surfaces at the front and the rear, a seaming convex structure (131) is formed, the lower part of the side panel (121) is provided with a hooking hole (121 a), and after the side panel (121) is inwards bent, the hooking hole (121 a) is hung on a stud (51) of the retainer (5); the front convex part (111) is formed by folding double-layer fabrics along a cutting line (961) and sewing along a sewing line (141), and the rear, left and right convex parts (111) are formed by overlapping an upper panel (11) and a side panel (121) and sewing along the sewing line (141).
2. An airbag apparatus according to claim 1, wherein: the cutting lines (961) are alternately arranged by breaking parts and overlapping parts, the length of the breaking parts is larger than that of the overlapping parts, and two ends of the cutting lines (961) are both overlapping parts.
3. A method of manufacturing an airbag apparatus according to claim 1, characterized in that: the method comprises the following steps: step 1, a retainer is arranged in an air bag, and a stud is exposed from the air bag; step 2, folding the compressed air bag to enable the space volume of the air bag to be equivalent to the cavity space of the flexible cover body; step 3, the folded air bag and the retainer are arranged in the cavity of the flexible cover body; step 4, bending a side panel of the flexible cover body to enable the hanging hole to be hung on the stud; and 5, sleeving the mounting holes of the rigid lower mounting part and the gas generator into the studs in sequence, and screwing nuts into the studs and tightening.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710028562.0A CN106828397B (en) | 2017-01-16 | 2017-01-16 | Airbag device and method for manufacturing same |
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| CN201710028562.0A CN106828397B (en) | 2017-01-16 | 2017-01-16 | Airbag device and method for manufacturing same |
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| CN106828397A CN106828397A (en) | 2017-06-13 |
| CN106828397B true CN106828397B (en) | 2023-05-05 |
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| CN107860759A (en) * | 2017-10-31 | 2018-03-30 | 江苏大学 | A kind of preparation method of molecular engram sensor with SERS activity and application |
| EP3947053A4 (en) * | 2019-03-29 | 2022-08-10 | MCPP Innovation LLC | All tpo airbag assemblies |
| CN110182158B (en) * | 2019-05-17 | 2024-04-26 | 延锋汽车智能安全***有限责任公司 | Airbag device and method for manufacturing same |
| CN114103862B (en) * | 2020-08-28 | 2023-08-04 | 广州汽车集团股份有限公司 | Automobile escape device and automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5393090A (en) * | 1993-06-02 | 1995-02-28 | General Motors Corporation | Fabric housing for air bag inflator |
| JP5523793B2 (en) * | 2009-10-30 | 2014-06-18 | 芦森工業株式会社 | Airbag device |
| JP6091772B2 (en) * | 2011-06-10 | 2017-03-08 | 芦森工業株式会社 | Airbag device |
| DE102012003351A1 (en) * | 2012-02-21 | 2013-08-22 | Trw Automotive Gmbh | Airbag module and module with an instrument panel and a gas bag module |
| WO2015024544A1 (en) * | 2013-08-20 | 2015-02-26 | Trw Automotive Gmbh | Airbag module and assembly comprising an instrument panel and an airbag module |
| WO2015024543A1 (en) * | 2013-08-20 | 2015-02-26 | Trw Automotive Gmbh | Airbag module, and assembly comprising a dashboard and an airbag module |
| CN206485305U (en) * | 2017-01-16 | 2017-09-12 | 延锋百利得（上海）汽车安全***有限公司 | A kind of air bag device |
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Effective date of registration: 20191216 Address after: 200120 Building 8, No. 88, Shengrong Road, Pudong New Area, Shanghai Applicant after: Shanghai Lingang Junsheng automobile safety system Co.,Ltd. Applicant after: YANFENG AUTOMOBILE INTELLIGENT SAFETY SYSTEM Co.,Ltd. Address before: 201315 No. 426 Pu Pu Road, Cambridge Industrial Zone, Shanghai, Pudong New Area Applicant before: YANFENG KSS (SHANGHAI) AUTOMOTIVE SAFETY SYSTEMS Co.,Ltd. |
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