WO2018026175A1 - 자동차의 에어백 하우징 - Google Patents

자동차의 에어백 하우징 Download PDF

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Publication number
WO2018026175A1
WO2018026175A1 PCT/KR2017/008305 KR2017008305W WO2018026175A1 WO 2018026175 A1 WO2018026175 A1 WO 2018026175A1 KR 2017008305 W KR2017008305 W KR 2017008305W WO 2018026175 A1 WO2018026175 A1 WO 2018026175A1
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WO
WIPO (PCT)
Prior art keywords
housing
airbag
housing body
hook
reinforcement
Prior art date
Application number
PCT/KR2017/008305
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
이성우
김동영
김동원
최현진
변계웅
강용한
김희준
Original Assignee
아우토리브 디벨롭먼트 아베
(주)엘지하우시스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 아우토리브 디벨롭먼트 아베, (주)엘지하우시스 filed Critical 아우토리브 디벨롭먼트 아베
Priority to CN201780045721.6A priority Critical patent/CN109843655B/zh
Publication of WO2018026175A1 publication Critical patent/WO2018026175A1/ko

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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
    • B60R21/20—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/14—Clamps
    • 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
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/718—Cosmetic equipment, e.g. hair dressing, shaving equipment
    • 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
    • B60R2021/2177—Reaction canisters characterised by material
    • B60R2021/2178—Plastic

Definitions

  • the present invention relates to an airbag housing for an automobile manufactured using a fiber reinforced thermoplastic composite.
  • airbags are mounted on a vehicle to protect the passengers from impacts in the event of a collision of the vehicle on the set speed.
  • Air bags When a collision is detected by the sensor, the actuating device is exploded and the airbag is inflated momentarily by the explosion gas. At this time, the time for fully operating the airbag from the collision is very short. Air bags also use gas stored in a high pressure gas or high pressure gas container resulting from the rapid combustion of solids.
  • the airbag system for mounting and operating the airbag consists of an airbag module and a shock detection module including sensors, batteries and diagnostics.
  • the airbag housing has a box shape in which one side is opened to receive the airbag in a folded state therein, and an airbag door is coupled to an opening of the airbag housing. It is known that the airbag housing and the airbag door are combined by a snap fit method. According to the snap fit method, for example, a hook is formed at one side of the airbag housing, and a hook hole is formed at the holding part of the airbag door, so that the hook of the airbag housing is caught by the hook hole of the airbag door.
  • the airbag housing is required to be formed of a material having physical properties that can withstand the impact energy generated during airbag deployment.
  • the airbag is required to be formed of a material having proper durability even when exposed to a high temperature and high humidity use environment or a low temperature use environment.
  • the performance of the compressed gas propellant may be degraded to generate excessive internal pressure, and the airbag housing may be ruptured when the airbag is deployed to injure passengers.
  • the engaging portion of the airbag housing for example, the hook hook portion to which the airbag door is coupled is fragile, so that a crack or damage may occur at the hook hook portion when the airbag is deployed, and the passenger may be injured.
  • the airbag housing is generally formed of a metallic composite to secure the physical properties as described above.
  • the metal composite is formed in this way, the weight of the vehicle is increased, and the manufacturing process is very cumbersome.
  • Patent Document 1 US Patent No. US 8,348,302
  • Patent Document 2 US Patent No. US 8,459,688
  • An object of the present invention is to provide an airbag housing for automobiles, which is capable of reducing the weight of the airbag housing, ensuring durability suitable for use in an environment of impact, high temperature, and low temperature, which is applied during airbag deployment.
  • a housing body having an opening on one side to define a receiving portion for receiving the airbag in a folded state, formed of a fiber-reinforced thermoplastic composite; And a reinforcing structure which is injection molded to surround the outer surface of the bottom of the housing body and the outer surface of the side of the housing body after inserting the housing body, and formed of a fiber-reinforced thermoplastic composite having a lower strength than the housing body.
  • the housing body may be formed of a continuous fiber reinforced thermoplastic composite, and the reinforcing structure may be formed of a long fiber reinforced thermoplastic composite or a short fiber reinforced thermoplastic composite.
  • Hook skeleton protrudes outwardly of the housing main body at a predetermined interval on the opening side of the side of the housing main body, and the reinforcing structure is formed to surround the hook skeleton, the catch is caught in the engaging hole of the airbag door in its distal end It may include an additional extension hook reinforcement.
  • An upper portion of the side of the housing body may include a bent portion bent at an angle to the outside of the housing body, the reinforcement structure may have an internal reinforcement extending from the hook skeleton to the bent portion.
  • the hook skeleton may include an inclined portion that is inclined outwardly from the side of the housing body and an extension that protrudes outwardly of the housing body from the inclined portion to be orthogonal to the side portion of the housing body.
  • a stepped portion may be formed between the inclined portion and the extension portion of the hook skeleton.
  • Mounting brackets protrude from two other sidewalls of the housing body connecting the two sidewalls of the housing body in which the hook skeleton is formed, and the reinforcing structure may include an injection molded bracket reinforcement surrounding the mounting bracket.
  • An inflator hole may be formed at the bottom of the housing body and the reinforcing structure.
  • the reinforcing structure may further include reinforcing ribs for reinforcing the side portion and the bottom portion of the housing body.
  • the weight of the airbag housing may be reduced, and under the use environment of various temperature ranges, the strength sufficient to withstand the impact applied when the airbag is deployed. It can be secured.
  • the airbag housing may be formed in double layers by compression molding and injection molding, thereby increasing the strength of the airbag housing.
  • the hook portion and the mounting portion of the structurally vulnerable airbag housing are composed of a double layer, thereby preventing the passenger from being injured by preventing the hook portion and the mounting portion of the airbag housing from being damaged.
  • the upper opening side of the airbag housing is formed in a double layer, it is possible to reduce the deformation of the opening side of the airbag housing when the airbag deployment. Accordingly, the vehicle internal structure adjacent to the airbag housing, for example, an instrument panel or an airbag door, may be damaged to prevent passengers from being injured.
  • FIG. 1 is a longitudinal sectional view showing a passenger seat airbag device according to an embodiment of the present invention.
  • Figure 2 is an exploded perspective view showing the configuration of the airbag housing according to an embodiment of the present invention.
  • FIG 3 is an internal perspective view of an airbag housing according to an embodiment of the present invention.
  • FIG. 4 is a bottom perspective view of an airbag housing according to an embodiment of the present invention.
  • FIG. 5 is a cross-sectional view taken along the line VV of FIG. 3.
  • FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 3.
  • reference numeral U denotes the opening side direction of the airbag housing 100
  • reference numeral L denotes the bottom side direction of the airbag housing facing the opening side of the airbag housing 100.
  • an airbag housing 100 of a vehicle is mounted to a passenger seat side instrument panel 1.
  • the airbag housing 100 may be mounted on a steering wheel or a driver's side instrument panel of the vehicle.
  • the airbag housing 100 is formed in a cylindrical shape with one surface open to accommodate the airbag 3 in a folded state.
  • the airbag housing 100 may have various shapes such as a cylinder or a square cylinder. According to one embodiment of the invention, the airbag housing 100 has a rectangular cylinder shape.
  • a plurality of hooks 101 are provided on an upper sidewall of the airbag housing 100.
  • the hook portion 101 is formed around the opening side of the airbag housing 100 to couple the airbag housing 100 with the airbag door 10.
  • Hook portion 101 may be formed in plurality, it may be formed on both sides of the airbag housing 100 facing each other.
  • the airbag housing 100 includes a housing body 110 and a reinforcement structure 130.
  • the housing body 110 is formed of a fiber reinforced thermoplastic composite, such as a continuous fiber reinforced thermoplastic composite.
  • the reinforcing structure 130 inserts the housing main body 110 into the injection mold, and then injects injection molding material to inject the injection material to surround the outer surface of the bottom of the housing main body 110 and the outer surface of the side of the housing main body 110. It can be formed by.
  • the reinforcing structure 130 is made of a fiber reinforced thermoplastic composite having a lower strength than the housing body 110, such as a short fiber reinforced thermoplastic composite or a long fiber reinforced thermoplastic composite. Is formed to complement the strength of the housing body 110.
  • the airbag housing 100 is formed of two layers using two kinds of fiber-reinforced thermoplastic composites having different strengths, thereby reducing weight and having excellent specific stiffness and specific strength. have.
  • the reinforcing structure 130 may be manufactured to be a separate structure from the housing main body 110 and fitted to the outside of the housing main body 110.
  • the bottom of the airbag housing 100 is provided with an inflator accommodating portion 9 in which an inflator 6 is installed, and the inflator accommodating portion 9 is formed in a cylindrical shape with one surface open to accommodate the inflator 6. do.
  • the inflator accommodating part 9 may have a cylindrical shape protruding downward from the airbag housing 100.
  • the airbag 3 is provided to expand and deploy through the opening of the airbag housing 100 when the inflator 6 is operated, and the inflator 6 is provided to inject gas into the airbag 3.
  • a portion of the airbag 3 is connected to the inflator 6 so that gas can be supplied from the inflator 6.
  • the inflator 6 is arranged to inflate and expand the airbag 3 by blowing gas toward the opening side of the airbag housing 100.
  • the airbag 3 is coupled to the bottom of the airbag housing 100 via the coupling member 8.
  • the airbag door 10 is formed in a cylindrical shape with a lower surface opened.
  • the airbag door 10 has an opening corresponding to the opening of the airbag housing 100 to be coupled to surround the airbag housing 100.
  • the airbag door 10 includes a door part 11 covering an opening of the airbag housing 100, a housing loop 13 extending from both sides of the door part 11, and coupled to the instrument panel 1, and a door part ( And a support 15 protruding from the bottom of 11).
  • the door part 11 of the airbag door 10 includes a rupture part 11a and a hinge part 11b.
  • the rupture portion 11a is a portion that is ruptured by the inflation of the airbag 3
  • the hinge portion 11b is a portion that becomes the hinge axis of the door portion 11 that is opened in accordance with the hinge motion.
  • the tearing part 11a is heat-opened.
  • the door portion 11 is cut to the vicinity of the hinge portion 11b starting from the rupture of the rupture portion 11a so that the airbag 3 is expanded and deployed out of the airbag door 10.
  • the strut portion 15 of the airbag door 10 may be formed to correspond to the side surface of the airbag housing 100 to surround the side surface of the airbag housing 100.
  • the strut portion 15 has a locking hole 15a formed to be coupled to the hook 101 of the airbag housing 100.
  • Figure 2 is an exploded perspective view showing the configuration of the airbag housing according to an embodiment of the present invention
  • Figure 3 is an internal perspective view of the airbag housing according to an embodiment of the present invention
  • Figure 4 is an embodiment of the present invention Bottom perspective view of an airbag housing according to the present invention.
  • the airbag housing 100 includes the housing body 110 and the entire outer surface of the side portions 111, 112, 113, and 114 of the housing body 110 and the bottom portion 115, and the side portions 111, 112, 113, and 114 of the housing body 110.
  • Reinforcement structure 130 is configured to surround a portion of the inner surface.
  • the housing body 110 may be formed by compression molding using a fiber reinforced thermoplastic composite, such as a continuous fiber reinforced thermoplastic composite.
  • the reinforcing structure 130 may be formed integrally with the housing body 110 by inserting the housing body 110 and then injection molding the fiber reinforced thermoplastic composite. 2 shows a state in which the reinforcing structure 130 is separated from the housing body 110 for ease of description.
  • the reinforcing structure 130 may be manufactured to be a product separated from the housing main body 110 and fitted to the housing main body 110.
  • the housing main body 110 is formed to have an approximately rectangular parallelepiped shape, and defines an inner space S, and the air bag 3 (see FIG. 1) is folded in the inner space S.
  • the housing body 110 may include two side portions 111 and 112 facing each other on the long side, and side portions 113 and 114 on the short side disposed between the two side portions 111 and 112 on the long side, and a bottom portion 115.
  • a plurality of hook skeletons 116 protrude outwardly at regular intervals on the upper ends of the long sides 111 and 112.
  • Mounting brackets 118 may be provided to protrude to the outside of the housing body 110 at the side portions 113 and 114 of the short sides.
  • the mounting bracket 118 allows the airbag housing 100 to be mounted directly or indirectly on an internal structure of the vehicle, such as the instrument panel 1, the airbag door 10, or the cowl cross bar.
  • the mounting bracket 118 is formed with a bracket hole 118a through which a coupling member, for example, a fastening bolt passes.
  • a fastening hole 115b is formed to allow engagement.
  • the reinforcing structure 130 is formed to surround the entire outer surface of the bottom 115 and the sides 111, 112, 113, and 114 of the housing body 110, the hook skeleton 116, and the mounting bracket 118.
  • the reinforcement structure 130 includes a bottom reinforcement 135 corresponding to the bottom 115 of the housing body 110 and side reinforcements 131, 132, 133, and 134 corresponding to the side portions 111, 112, 113, and 114 of the housing body 110.
  • the side reinforcement portions 131 and 132 of the long sides of the reinforcement structure 130 are formed with hook reinforcement portions 136 formed to surround the hook skeleton 116 of the housing body 110, and the side reinforcement of the short sides of the reinforcement structure 130 is formed.
  • the parts 133 and 134 may include bracket reinforcement parts 138 formed to surround the mounting bracket 118 of the housing body 110.
  • hook portion 101 a portion of the hook skeleton 116 wrapped in the hook reinforcement 136
  • mounting portion 103 a portion of the mounting bracket 118 wrapped in the bracket reinforcement 138
  • the reinforcing structure 130 has an inner reinforcement 137 partially covering the inner surfaces of the sides 111, 112, 113, and 114 of the housing body 110, so that the side of the housing body 110 adjacent to the hook skeleton 116 and the mounting bracket 118 is formed. Increase the reinforcement strength of the upper portions of (111, 112, 113, 114).
  • the inner reinforcement part 137 reinforces surrounding the upper portion of the inner surfaces of the side parts 111, 112, 113, and 114 of the housing body 110 to prevent the opening of the airbag housing 100 from being opened when the airbag is deployed.
  • a part connected to the airbag housing 110 for example, the instrument panel 1 or the airbag door 10, may be prevented from being damaged, thereby preventing the passenger from being injured.
  • the inner reinforcement portion 137 is disposed adjacent to the hook portion 101 and the mounting portion 103 to increase the support strength of the hook portion 101 and the mounting portion 103, so that the hook during the airbag deployment It is possible to prevent the passenger from being injured by preventing cracks or damage to the unit 101 and the mounting unit 103.
  • Reinforcing ribs 139 are formed on the outer surfaces of the bottom reinforcement 135 and the side reinforcement 131, 132, 133, 134 of the reinforcement structure 130 to increase durability.
  • the bottom reinforcement 135 of the reinforcing structure 130 has an inflator hole 135a corresponding to the inflator hole 115a of the bottom 115 of the housing body 110 and the bottom 115 of the housing body 110.
  • the fastening hole 135b corresponding to the fastening hole 115b is formed.
  • FIG. 5 is a cross-sectional view taken along the line VV of FIG. 3.
  • the hook skeleton 116 is formed with an inclined portion 116a formed to be inclined at an angle from the upper end of the side portions 111 and 112 of the housing body 110 and the side portions 111 and 112 of the housing body 110. ) And an extension portion 116b protruding from the inclined portion 116a to the outside of the housing body 110. A stepped portion 116c is formed between the inclined portion 116a and the extension portion 116b.
  • the hook skeleton 116 is wrapped through the hook reinforcement 136 of the reinforcement structure 130.
  • the hook reinforcement 136 extends from the side reinforcements 131 and 132 of the reinforcement structure 130 along the inclined portion 116a and the extension 116b of the hook skeleton 116 to surround the hook skeleton 116.
  • the internal forming portion 136a of the hook reinforcing portion 136 formed on the inner surface of the inclined portion 116a side of the hook skeleton 116 extends with the internal reinforcing portion 137 and is formed to be substantially orthogonal.
  • the thickness of the portion supporting the inclined portion 116a of the hook skeleton 116 can be relatively thick, thereby increasing the supporting strength of the hook skeleton 116.
  • the housing body 110 is inserted into the injection mold by the step 116c between the inclined portion 116a and the extension portion 116b of the hook skeleton 116, and then injection molded and solidified into a thermoplastic composite.
  • the contact area may be increased to allow the reinforcing structure 130 to be firmly in contact with the hook skeleton 116.
  • a locking part 136b protruding substantially parallel to the side reinforcement parts 131 and 132 of the reinforcement structure 130 is extended to a locking hole formed in the support part 15 of the airbag door 10. (15a) (see Fig. 1).
  • the starting point of the inclined portion 116a of the hook skeleton 116 and the side portions 111 and 112 of the housing main body 110 have a step by a predetermined distance D to the bent portions 111a and 112a in the outward direction of the housing main body 110.
  • the internal reinforcement part 137 is formed in this step part.
  • the bent portions 113a and 114a are also substantially formed on the side portions 113 and 114 of the housing body 110 and the inner reinforcement portion 137 surrounds the entire upper surface of the housing body 110 (FIG. 6). Reference).
  • the internal reinforcement part 137 extends from the side reinforcement parts 131, 132, 133, and 134 of the reinforcement structure 130 to extend to the inner surface of the side parts 111, 112, 113, and 114 of the air bag body 110, and when the air bag is inflated, the reinforcement structure 130 is connected to the air bag body ( It is possible to prevent the separation from the 110).
  • the hook portion 101 of the airbag housing 100 has a high strength hook skeleton 116 and the hook skeleton 116 wrapped around the hook skeleton 116 as described above, the strength of the hook skeleton 116 It consists of a hook reinforcement 136 to reinforce, and extends with the internal forming portion 136a of the hook reinforcement 136 is formed with an internal reinforcement 137. In such a configuration, when the airbag is deployed, it is possible to effectively prevent cracks or rupture of the hook portion 101.
  • FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 3.
  • the mounting bracket 118 protrudes outward from the side portions 113 and 114 of the short sides of the housing main body 110.
  • the mounting bracket 118 is formed with a bracket hole 118a.
  • the mounting bracket 118 inserts the housing body 110 into the injection mold, and then reinforces the bracket formed by extending from the side reinforcement parts 133 and 134 of the reinforcement structure 130 when forming the reinforcement structure 130 by injection molding.
  • the bracket reinforcing part 138 has a hole 138a corresponding to the bracket hole 118a.
  • the airbag housing 100 in which the housing body 110 and the reinforcement structure 130 are integrated is connected to an internal structure of the vehicle, such as the instrument panel 1, the airbag door 10, or the cowl crossbar. Can be coupled through the member.
  • the housing body 110 may include a fiber reinforced thermoplastic composite, for example, a continuous fiber reinforced thermoplastic composite, which has excellent mechanical rigidity and is capable of being lightweight.
  • the housing body 110 includes a predetermined weight percent continuous fiber and a predetermined weight percent thermoplastic composite.
  • the housing body 110 may include 50 to 70% by weight of continuous fibers and 30 to 50% by weight of a thermoplastic composite.
  • the continuous fiber may be one of glass fiber, carbon fiber and natural fiber.
  • Thermoplastic composites include at least one selected from polyamide (PA), polyethylene (polyethylent, PE), polypropylene (PP), polyisobutylene, and polyethylene terephthalate (PET) can do.
  • the thermoplastic composite may use one selected from polyamide or polypropylene.
  • the housing body 110 may include 40 wt% polyamide (PA) and 60 wt% glass fiber.
  • the housing body 110 may include 40 wt% polypropylene (PP) and 60 wt% glass fibers.
  • the reinforcing structure 130 may include a long fiber reinforced thermoplastic composite or a short fiber reinforced thermoplastic composite having a lower strength than the housing body 110.
  • the reinforcing structure 130 may include a predetermined weight percent thermoplastic and a predetermined weight percent long fiber.
  • Thermoplastics may use selected ones of polyamide or polypropylene.
  • the long fiber is 6 mm to 25 mm in length, and any one of glass fiber and carbon fiber natural fiber can be used.
  • the reinforcing structure 130 may include 70% by weight of polyamide (PA) and 30% by weight of long fiber glass fibers. In another embodiment, the reinforcing structure 130 may include 60 wt% polypropylene (PP) and 40 wt% long fiber glass fibers.
  • PA polyamide
  • PP polypropylene
  • the reinforcing structure 130 may include a predetermined weight percent thermoplastic and a predetermined weight percent short fibers.
  • the thermoplastic composite may use one selected from polyamide or polypropylene.
  • the short fibers have a shorter length than the long fibers, and any one of glass fibers and carbon fibers natural fibers can be used.
  • the inflator 6 when a controller (not shown) detects a collision based on a signal from a sensor during a vehicle collision, the inflator 6 is operated by the controller. When the inflator 6 is operated to eject gas into the airbag 3, the airbag 3 is inflated and presses the airbag door 10 upward in the direction of the arrow. Subsequently, when the rupture portion 11a of the airbag door 10 is ruptured by the inflation pressure of the airbag 3, and the airbag door 10 is rotated about the hinge portion 11b, the airbag 3 is moved to the airbag housing ( 100) to expand and deploy towards the passenger to protect the passenger.
  • the airbag housing 100 is formed in a double layer by using a fiber reinforced thermoplastic composite having different strengths, so that the airbag 3 is not ruptured by the airbag inflation pressure. Can withstand
  • the airbag housing 100 includes, for example, a high strength housing body 110 formed of a continuous fiber reinforced thermoplastic composite and a continuous fiber reinforced thermoplastic composite that surrounds the housing body 110 to form the housing body 110.
  • a reinforcing structure 130 formed of a long fiber reinforced thermoplastic composite or a short fiber reinforced thermoplastic composite. Therefore, when inflating the airbag (3), it can be stably endured without bursting.
  • the reinforcing structure 130 has reinforcing ribs 139 formed on the side reinforcing parts 131, 132, 133, 134 and the bottom reinforcing part 135 to further supplement the strength.
  • the airbag housing 100 is composed of a housing body 110 of an excellent continuous fiber reinforced thermoplastic composite having a basic durability that can withstand the airbag inflation pressure while reducing the weight of the airbag housing 100.
  • the reinforcing structure 130 may be integrally formed on the outer surface of the housing main body 110 using a long fiber or a short fiber reinforced thermoplastic composite, thereby reinforcing the overall strength of the housing main body 110 and the reinforcing structure 130.
  • the inner reinforcing portion 137 is additionally configured on the upper inner surfaces of the side parts 111, 112, 113, and 114 of the housing main body 110 to reinforce the strength of the opening-side circumferential portion of the housing main body 110.
  • the inner reinforcement part 137 also surrounds the housing body 110 as a whole, and serves to firmly fix the injection-molded reinforcement structure 130 to the housing body 110. That is, as the reinforcing structure 130 is formed by injection molding on the outer surface of the housing main body 110 using a material having a different strength from that of the housing main body 110, the reinforcing structure 130 has an airbag expansion force in the airbag main body 110. Can be separated from.
  • the internal reinforcement part 137 extends from the side reinforcement parts 131, 132, 133 and 134 of the reinforcement structure 130 to extend to the inner surface of the side parts 111, 112, 113, and 114 of the airbag body 110 so that the reinforcement structure 130 is the airbag body 110. It can be prevented from detaching from.
  • a hook skeleton 116 protrudes from an outer side of the housing main body 110 at an upper end of the side portions 111 and 112 of the long sides of the housing main body 110.
  • Hook portion 101 consisting of a hook reinforcement portion 130 extending from the side reinforcement portion (131,132) of the reinforcement structure 130 to surround the 116 as a whole.
  • the hook skeleton 116 includes an inclined portion 116a extending outwardly at an angle from the sides 111 and 112 of the housing body 110, and the hook reinforcement 136 is an inclined portion 116a of the hook skeleton 116.
  • the reinforcing strength of the hook frame 116 may be relatively thick, thereby increasing the reinforcing strength.
  • the inner shape part 136a is formed to be connected to the inner reinforcement part 137 surrounding the inner surfaces of the side parts 111, 112, 113, and 114 of the housing body 110, thereby enhancing the reinforcing effect of the hook skeleton 116.
  • a stepped portion 116c is formed between the inclined portion 116a and the extension portion 116b of the hook skeleton 116 to increase the contact area with the hook reinforcement portion 136, so that the hook reinforcement portion 136 is connected to the hook skeleton ( 116 can be firmly contact supported.
  • the mounting bracket 118 protrudes outward from the side portions 113 and 114 of the short sides of the housing main body 110, and the mounting bracket 118 is a bracket reinforcement 138 of the reinforcing structure 130. Strengthen while enclosing overall. In this configuration, when the airbag is inflated, a portion in which the mounting bracket 118 is formed may be prevented from being separated from the housing body 110 or cracks may be prevented from injuring the passenger.
  • the bracket reinforcement 138 may be formed to extend with the internal reinforcement 137 to increase the reinforcing effect of the mounting bracket 118.
  • the airbag housing 100 can secure durability while reducing weight by forming a double layer using a fiber-reinforced thermoplastic composite, and ensuring proper durability even in a high or low temperature use environment. It is possible and can be manufactured easily.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Air Bags (AREA)
PCT/KR2017/008305 2016-08-03 2017-08-01 자동차의 에어백 하우징 WO2018026175A1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780045721.6A CN109843655B (zh) 2016-08-03 2017-08-01 汽车的安全气囊外壳

Applications Claiming Priority (2)

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KR1020160098770A KR101810004B1 (ko) 2016-08-03 2016-08-03 자동차의 에어백 하우징
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