Self-adaptive automobile safety air bag module

Abstract

The invention discloses a self-adaptive automobile safety air bag module which comprises an air bag shell, an air bag assembly and an air generator are installed in the air bag shell through a supporting ring assembly, and a bottom cover is fixedly arranged on the bottom face of the air bag shell through bolts of the supporting ring assembly. The air bag is provided with an adjusting exhaust port and connected with a tying rope, and one end of the tying rope is tied to the adjusting exhaust port and used for controlling opening and closing of the adjusting exhaust port. A fixing seat is clamped on the bottom surface of the air bag shell and located on one side of the center hole, a cavity with an opening in the upper end is formed in the fixing seat, a pin puller is clamped in the cavity, and the other end of the tether penetrates through the opening in the bottom surface of the air bag shell and the opening in the upper end of the cavity and is arranged on a pin shaft of the pin puller in a sleeving mode to be used for controlling release of the tether. Therefore, opening and closing of the exhaust port are controlled and adjusted. The air bag has the beneficial effects that the exhaust flow of the air bag can be adjusted, and the protection requirements of passengers with different collision strengths and different body types can be met.

Description

Technical Field

[0001] This invention relates to the field of automotive passive safety, and in particular to an adaptive automotive airbag module. Background Technology

[0002] As European automotive safety standards (ECE R94, ECE R137-02) continuously upgrade their requirements for occupant protection, the multiple fixed-diameter exhaust ports on traditional driver airbag modules can no longer meet compliance needs under diverse operating conditions. The main problems are as follows: 1. Poor adaptability of fixed exhaust ports: The diameter of the fixed exhaust ports is fixed, and the exhaust flow cannot be adjusted according to the collision intensity (such as low-speed collision 5-10km / h, medium-speed collision 10-40km / h, high-speed collision >40km / h). This results in the airbag depressurizing too quickly and providing insufficient protection in low-speed collisions, and depressurizing too slowly in high-speed collisions, leading to excessive compression force on the occupant's chest or head. This makes it difficult to meet the European standard's limit requirements of ≤1000 for head injury index (HIC) and ≤50mm for chest compression. 2. Failure to consider differences in occupant size: The European population has a wide size range (5% women to 95% men), and traditional exhaust structures cannot meet the cushioning needs of occupants of different heights (150-195cm) and weights (45-120kg). Smaller occupants are prone to secondary injuries due to excessive airbag pressure, while larger occupants are prone to protection failure due to excessively rapid decompression, which does not meet the ECE R94 requirement for full occupant protection. 3. Failure to meet key European standards: Existing adaptive exhaust solutions (such as the mechanically triggered exhaust valve in US8979786B2) have a response delay of ≥5ms, exceeding the European standard requirement of ≤3ms response time limit; and lack anti-false triggering design, making it prone to malfunction in non-collision conditions (such as emergency braking), violating the ECE R137 requirements for airbag system reliability. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an adaptive automotive airbag module with adjustable exhaust flow, which can meet the protection requirements for occupants with different collision intensities and different body sizes.

[0004] The technical solution of the present invention is as follows: An adaptive automotive airbag module includes an airbag housing, an airbag assembly and a gas generator installed inside the airbag housing via a support ring assembly, and a bottom cover fixed to the bottom surface of the airbag housing by bolts of the support ring assembly. The special feature is that the airbag assembly includes an airbag, and an adjustable exhaust port is provided on the airbag and connected to a tether. One end of the tether is tied to the adjustable exhaust port for controlling the opening and closing of the adjustable exhaust port. A fixing seat is installed on the bottom surface of the airbag housing, located on one side of the central hole. The fixing seat has a cavity with an upper opening, and a puller is installed in the cavity. The other end of the tether passes through the opening on the bottom surface of the airbag housing and the opening at the upper end of the cavity and is sleeved on the pin of the puller to control the release of the tether, thereby controlling the opening and closing of the air outlet.

[0005] As a further preferred embodiment, four fixed supports and two positioning hooks are symmetrically arranged on both sides of the opening at the upper end of the cavity on the fixed base. Four positioning grooves and a rectangular slot are provided on the bottom surface of the airbag shell. The fixed supports are respectively inserted into the corresponding positioning grooves, and the two positioning hooks are inserted into and locked in the rectangular slot to facilitate positioning of the fixed base.

[0006] As a further preferred embodiment, rectangular windows are symmetrically provided on both sides of the middle part of the cavity on the fixed base, and an annular boss is provided inside the cavity. The annular boss is engaged in the limiting groove on the outer edge of the pin puller to facilitate the installation and positioning of the pin puller.

[0007] As a further preferred option, symmetrical openings are provided on both sides of the cavity corresponding to the rope attachment point on the fixing base to facilitate the installation of the rope.

[0008] As a further preferred option, a limiting rib is provided at the bottom of the fixing seat corresponding to the opening to constrain the position of the rope after installation.

[0009] As a further preferred embodiment, a contoured through hole is provided on the bottom cover at the position corresponding to the fixed seat, which is fitted with the contour of the fixed seat. The fixed seat is led out from the bottom cover through the contoured through hole and pressed onto the fixed support foot through the contoured through hole to limit the position of the fixed seat.

[0010] As a further preferred embodiment, four mounting holes are evenly distributed around the central hole on the bottom cover, and the bolts of the support ring assembly pass through the corresponding mounting holes and are fixed by nuts.

[0011] As a further preferred embodiment, multiple claws are provided on the outer edge of the airbag housing, and a decorative cover is fitted on the outside of the airbag housing. The decorative cover is engaged with the claws one by one through a rectangular slot on its outer wall, and the lower end of the decorative cover is inserted into the bottom cover.

[0012] As a further preferred embodiment, the pin puller is a pyrotechnic pin puller and is electrically connected to the vehicle's electronic control unit.

[0013] The beneficial effects of this invention are: 1. Because the airbag has an adjustable exhaust port and a tether is connected to it, one end of the tether is tied to the adjustable exhaust port, and the other end of the tether passes through the opening on the bottom of the airbag shell and the opening at the top of the cavity and is sleeved on the pin of the puller. The collision intensity of the car and the weight of the occupant are monitored by the collision sensor on the vehicle body and the pressure sensor on the seat, respectively, and the data is transmitted to the electronic control unit. The electronic control unit controls the ignition of the puller according to the received signal, which releases the tether and opens the adjustable exhaust port, thereby realizing adjustable exhaust flow. This module can meet the protection requirements of ECE R94 and ECE R137 for occupants with different collision intensities and different body types. The measured HIC value is ≤850, the chest compression is ≤45mm, and the neck shear force is ≤4.2kN, all of which are better than the European standard limits.

[0014] 2. Fast response speed and wide applicability, covering collision speeds of 5-60km / h and occupant weight ranges of 45-120kg, solving the problem of poor adaptability of traditional fixed exhaust ports; 3. Small size and light weight, compatible with the installation space and folding process of existing driver airbags, no need to modify the steering wheel structure, and low manufacturing cost. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 yes Figure 1 The left view.

[0017] Figure 3 yes Figure 1 A bottom view.

[0018] Figure 4 yes Figure 2 AA sectional view.

[0019] Figure 5 yes Figure 2 BB cross-sectional view.

[0020] Figure 6 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 7 This is a structural diagram of the fixed base.

[0022] Figure 8 This is a schematic diagram of the pin puller.

[0023] Figure 9 This is a schematic diagram of the bottom cover.

[0024] Figure 10 This is a three-dimensional structural diagram of the airbag shell.

[0025] Figure 11This is a schematic diagram of the air bag assembly of the present invention.

[0026] Figure 12 This is the control principle diagram of the present invention.

[0027] In the diagram: 1. Bottom cover, 101. Contour through hole, 102. Mounting hole, 2. Fixing seat, 201. Annular boss, 202. Window, 203. Positioning hook, 204. Limiting rib, 205. Rectangular window, 206. Pull pin, 3. Pin, 301. Limiting groove, 302. Tie rope, 4. Air bag, 5. Adjustable exhaust port, 501. Fixed exhaust port, 502. Air bag shell, 6. Opening, 601. Rectangular bayonet, 602. Through hole, 603. Positioning groove, 604. Claw, 605. Support ring assembly, 7. Nut, 8. Decorative cover, 9. Gas generator, 10. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1-6 As shown, the present invention relates to an adaptive automotive airbag module, including an airbag housing 6, an airbag assembly and a gas generator 10 are installed inside the airbag housing 6 by means of a support ring assembly 7, and a bottom cover 1 is fixed on the bottom surface of the airbag housing 6 by means of bolts on the support ring assembly 7. The gas generator 10 is led out from the central hole of the airbag housing 6 and the bottom cover 1.

[0030] like Figure 11 As shown, the air bag assembly includes an air bag 5, which has two fixed exhaust holes 502 for adjusting the deployment pressure of the air bag 5; an adjustable exhaust port 501 is provided on the air bag 5 and a tether 4 is connected thereto, with one end of the tether 4 tied to the adjustable exhaust port 501 for controlling the opening and closing of the adjustable exhaust port 501.

[0031] A fixing seat 2 is mounted on the bottom surface of the airbag housing 6, located on one side of the central hole. The fixing seat 2 has a cavity with an upper opening, and a pin puller 3 is mounted within the cavity. The other end of the tether 4 passes through the opening 601 on the bottom surface of the airbag housing 6 and the opening at the upper end of the cavity, and is fitted onto the pin 301 of the pin puller 3. This is used to control the release of the tether 4, thereby controlling the opening and closing of the adjustable exhaust port 501. The pin puller is a pyrotechnic pin puller and is electrically connected to the vehicle's electronic control unit. In this embodiment, the pin puller 3 preferably adopts the pyrotechnic pin puller structure disclosed in publication number CN213859071U.

[0032] like Figure 7 , Figure 8 and Figure 10 As shown, four fixed legs 204 and two positioning hooks 203 are symmetrically arranged on both sides of the opening at the upper end of the cavity on the fixed base 2. Four through holes 603, four positioning grooves 604 and a rectangular slot 602 are provided on the bottom surface of the airbag shell 6. The fixed legs 204 are respectively inserted into the corresponding positioning grooves 604, and the two positioning hooks 203 are inserted into and locked in the rectangular slot 602 to facilitate positioning of the fixed base 2.

[0033] Two rectangular windows 206 are symmetrically arranged on both sides of the center of the cavity on the fixed base 2. An annular boss 201 is provided inside the cavity, which engages with the limiting groove 302 on the outer edge of the pin puller 3 to facilitate the installation and positioning of the pin puller 3. Windows 202 are symmetrically arranged on both sides of the cavity corresponding to the location of the tether 4 on the fixed base 2 to facilitate the installation of the tether 4. An integral limiting rib 205 is provided at the bottom of the fixed base 2 corresponding to the windows to constrain the position of the tether 4 after installation.

[0034] like Figure 9 As shown, a stepped contoured through hole 101 is provided on the bottom cover 1 at the position corresponding to the fixed seat 2, which is in line with the contour of the fixed seat 2. The fixed seat 2 is led out from the bottom cover 1 through the contoured through hole and pressed onto the fixed support leg 204 through the contoured through hole 101 to achieve Z-direction limiting of the fixed seat 2.

[0035] Four mounting holes 102 are evenly distributed around the central hole on the bottom cover 1. The bolts of the support ring assembly 7 pass through the corresponding through holes 603 and mounting holes 102 and are fixed by nuts 8, so that the airbag shell 6, air bag assembly, gas generator 10 and bottom cover 1 are fixed together by the support ring assembly 7.

[0036] Multiple claws 605 are provided on the outer edge of the airbag housing 6, and a decorative cover 9 is fitted on the outside of the airbag housing 6. The decorative cover 9 is engaged with the claws 605 one by one through a rectangular slot on its outer wall, and the lower end of the decorative cover 9 is inserted into the bottom cover 1.

[0037] When working Figure 12As shown, collision sensors installed on the vehicle body and pressure sensors installed on the seats monitor the collision intensity and occupant weight of the vehicle, respectively, and transmit the data to the electronic control unit (ECU). The ECU then controls the gas generator 10 to ignite and release gas into the airbag 5, causing the airbag 5 to inflate and expand, opening the tear-away opening on the top surface of the trim cover 9 and tightening the tether 4. Simultaneously, the ECU determines whether to activate the pin puller 3 based on the received collision intensity and occupant weight signals. For example, when the occupant is relatively light (≤50 kg) and a high-speed collision occurs, the ECU controls the pin puller 3 to ignite and activate, causing the pin 301 of the pin puller 3 to retract into its outer tube, thus releasing the tether 4. This allows the regulating exhaust port 501 to open without the restraint of the tether 4, thereby assisting in fixing the exhaust port and regulating the pressure inside the airbag 5 to prevent excessive pressure from causing secondary injury to the occupant.

[0038] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details.

Claims

1. An adaptive automotive airbag module, comprising an airbag housing, an airbag assembly and a gas generator mounted within the airbag housing via a support ring assembly, and a bottom cover fixed to the bottom surface of the airbag housing via bolts of the support ring assembly, characterized in that: The air bag assembly comprises an air bag, an adjusting exhaust port provided on the air bag, and a tether connected to the adjusting exhaust port, one end of the tether being tied to the adjusting exhaust port for controlling opening and closing of the adjusting exhaust port. The other end of the tether passes through an opening in the bottom surface of the air bag shell and an opening in the upper end of the cavity, and is sleeved on the pin shaft of the pin puller, for controlling release of the tether, thereby controlling opening and closing of the adjusting exhaust port.

2. An adaptive airbag module according to claim 1, characterized in that: Four fixed legs and two positioning hooks are symmetrically provided on the fixing seat on both sides of the opening in the upper end of the cavity, four positioning grooves and a rectangular slot are provided on the bottom surface of the air bag shell, the fixed legs are respectively inserted into the corresponding positioning grooves, and the two positioning hooks are inserted into and clamped in the rectangular slot, so as to position and fix the fixing seat.

3. An adaptive airbag module according to claim 1, characterized in that: Rectangular windows are symmetrically provided on both sides of the middle part of the cavity in the fixing seat, and an annular boss is provided in the cavity, the annular boss is clamped into the limiting groove in the outer edge of the pin puller, so as to facilitate installation and positioning of the pin puller.

4. An adaptive airbag module according to claim 1, characterized in that: Windows are symmetrically provided on both sides of the cavity in the fixing seat corresponding to the tether, so as to facilitate installation of the tether.

5. An adaptive airbag module according to claim 1, characterized in that: Limiting ribs are provided on the bottom of the fixing seat corresponding to the windows, so as to constrain the position of the tether after installation.

6. An adaptive airbag module according to claim 1, wherein the airbag module is characterized by: A profiled through hole is provided on the bottom cover corresponding to the position of the fixing seat, the fixing seat is led out of the bottom cover through the profiled through hole and is pressed on the fixed leg through the profiled through hole, so as to limit the fixing seat.

7. An adaptive airbag module according to claim 1, characterized in that: Four mounting holes are uniformly distributed on the periphery of the center hole of the bottom cover, and the bolts of the support ring assembly pass through the corresponding mounting holes and are fixed by nuts.

8. An adaptive airbag module according to claim 1, characterized in that: A plurality of clamping claws are provided on the outer edge of the air bag shell, and a decorative cover is sleeved on the outer surface of the air bag shell, the decorative cover is clamped one by one with the clamping claws through the rectangular slots provided on the outer wall of the decorative cover, and the lower end of the decorative cover is inserted into the bottom cover.

9. An adaptive airbag module according to claim 1 or 3, characterized in that: The pin puller is a pyrotechnic pin puller and is electrically connected with the electronic control unit of the automobile.

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