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a gas generator

A gas generator and exhaust hole technology, which is applied in the direction of vehicle safety arrangement, pedestrian/occupant safety arrangement, transportation and packaging, etc. problems, to achieve the effect of improving assembly space, reducing quality, and increasing output pressure

Active Publication Date: 2017-09-12
SHANGHAI LINGANG JOYSON SAFETY SYST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current pyrotechnic gas generator, the gas generated by the gas-generating medicine 6 will pass through the annular filter 51 according to the shortest distance to the exhaust hole 4-1, so the annular filter 51 usually only has a part of it It plays a filtering effect, but the part of the annular filter screen 51 far away from the exhaust hole 4-1 does not play a good filtering effect, and the utilization rate of the annular filter screen 51 is not high
[0004] In addition, this commonly used pyrotechnic gas generator structure also has a defect: the effective charge space of the gas-generating powder 6 is relatively small, and in order to achieve the predetermined output, the size of the gas generator has to be designed to be large and heavy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 2 , The present invention is a gas generator, comprising an upper shell, a lower shell, an igniter seat, an igniter, a filter screen, and a propagating cartridge. The igniter seat 1 is embedded in the center of the upper case 2 , the igniter seat 1 is connected with the igniter 3 , and the upper case 2 is connected with the lower case 4 . The filter screen 5 is cake-shaped, and the filter screen 5 is placed at the bottom of the lower shell 4 and covers the exhaust hole 4-1. The assembling space of the propellant 7 is formed between the bottom surface of the propellant cartridge 11 and the bottom surface of the propellant cartridge 11, and the assembling space of the gas-generating propellant 6 is formed between the ignition seat 1, the upper shell 2, the lower shell 4, the propellant cartridge 11 and the filter screen 5 .

[0025] The gas-generating agent 6 and the propagating agent 7 used in the pyrotechnic gas generator can be gas-generating agents and p...

Embodiment 2

[0034] This example only illustrates the differences from Example 1, and the same parts as Example 1 will not be repeated.

[0035] see image 3 , the center of the bottom of the lower shell 4 is provided with a pit structure, the exhaust hole 4-1 is located on the side wall of the pit structure, the filter screen 5 is filled in the pit structure, the outer diameter of the filter screen 5 and the inner diameter of the pit structure quite.

[0036] In order to prevent the burning residue of the gas-generating medicine 6 from slipping away from the gap between the filter screen 5 and the pit structure, the following design can be adopted: the upper end of the filter screen 5 is higher than the bottom plane of the lower shell 4, and the outer surface of the upper end of the filter screen 5 is provided with Step, the step fits with the bottom plane of the lower case 4 .

[0037] The concavo-convex structure of the lower shell 4 in this example allows all the gas generated by the...

Embodiment 3

[0039] This example only illustrates the differences from Embodiments 1 and 2, and the same parts as Embodiments 1 and 2 will not be repeated.

[0040] see Figure 4 , The bottom of the lower shell 4 is provided with an annular groove structure, and the filter screen 5 is filled in the annular groove structure. The exhaust hole 4 - 1 is located on the inner wall of the annular groove structure, and the exhaust hole 4 - 1 of the gas generator is no longer located on the outer circle of the lower shell 4 but inside the lower shell 4 .

[0041] The gas produced by the gas-generating drug 6 in this example is filtered and discharged by the filter screen 5, and is not directly sprayed to the air bag that needs to be inflated, but is refracted by the inner wall of the groove of the lower shell 4, and then flows to the air bag of the safety air bag. Inflate. In this way, in the initial stage of inflation, the impact on the peripheral parts of the airbag caused by excessive gas or o...

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PUM

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Abstract

The invention relates to the field of automobile passive safety, and particularly relates to a gas generator. The gas generator comprises an upper shell, a lower shell, an igniter seat, an igniter, a filter screen and a starting mix case, wherein the filter screen is cake-shaped, is arranged at the bottom of the lower shell and covers a gas vent; the starting mix case is arranged outside the igniter in a sleeved manner and is connected to the bottom of the igniter seat; a starting mix assembly space is formed between the bottom surface of the igniter and the bottom surface of the starting mix case; and a gas-forming chemical assembly space is formed among the igniter seat, the upper shell, the lower shell, the starting mix case and the filter screen. Compared with the prior art, the gas generator has the beneficial effects that the cake-shaped filter screen is arranged at the bottom of the gas generator and takes effect to the maximum limit; the lower shell is designed to be of a concave-convex structure so as to fit the assembly and fixation of the filter screen, so that gas generated by gas-forming chemicals passes through the filter screen from every direction; the whole filter screen plays a part in filtration; under the condition that a gas-forming chemical formula and the outline dimension of the gas generator are unchanged, the output pressure of the gas generator is increased, and the mass and earlier-stage output slope of the gas generator are reduced.

Description

technical field [0001] The invention relates to the field of automobile passive safety, in particular to a gas generator. Background technique [0002] see figure 1 , the existing pyrotechnic gas generator structure mostly adopts the lower shell 4 and the upper shell 2 in the shape of a cylindrical cup body. The ring wall of the lower shell 4 is evenly distributed with exhaust holes 4-1, A ring-shaped filter screen 51 is set, and a cup-shaped fire transfer cartridge 11 is arranged in the ring-shaped filter screen 51 , and the gas-generating powder 6 is assembled between the fire transfer cartridge 11 and the ring-shaped filter screen 51 . After the igniter seat 1 provided with the igniter 3 is centrally connected with the upper case 2 , it is located in the transfer cartridge 11 , and the transfer charge 7 is assembled between the transfer cartridge 11 and the igniter 3 . [0003] In the current pyrotechnic gas generator, the gas generated by the gas-generating medicine 6 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R21/264
CPCB60R21/264B60R21/2644
Inventor 张海龙庄晓吴水波于杰
Owner SHANGHAI LINGANG JOYSON SAFETY SYST CO LTD