CN212332587U

CN212332587U - Trigger for instantaneous lifting of automobile front cover

Info

Publication number: CN212332587U
Application number: CN202020554875.7U
Authority: CN
Inventors: 刘忠; 冉启权; 耿会角; 李卫
Original assignee: Hebei Dongfang Ruifeng Automobile Safety Component Co ltd
Current assignee: Hebei Dongfang Ruifeng Automobile Safety Component Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2021-01-12
Anticipated expiration: 2030-04-15

Abstract

A trigger for instantly lifting a front cover of an automobile comprises an ignition mechanism, a gas production medicine box, a shell, a piston rod and a gas production medicine; the ignition mechanism is arranged at the inner lower end of the shell, a gas production medicine box is arranged at the upper end of the ignition mechanism, and gas production medicines are contained in the gas production medicine box; the upper end of the gas production medicine box is provided with a piston rod, and the upper part of the shell is provided with an opening and can accommodate the piston rod to extend out; the upper side part of the shell is provided with an exhaust hole which penetrates through the shell. The utility model discloses a cooperation setting of ignition mechanism, gas production medicine box and piston, the action that lifts up at completion automobile bonnet rear portion that can be simple quick has avoided taking place because of the complicated condition that leads to trigger material with high costs of structure before, and this makes the trigger compare the structure simpler, material cost is lower with before to lift up fast, the buffering is effectual, better to pedestrian's protection effect.

Description

Trigger for instantaneous lifting of automobile front cover

Technical Field

The utility model relates to an automobile safety technical field, especially a trigger that is used for car shroud lifting in the twinkling of an eye belongs to the automobile parts field.

Background

Currently, in the safety problem of car accidents, the injury to the driver and the injury to the pedestrian are minimized. When the automobile collides with a pedestrian from the front, the head of the collided pedestrian probably collides with the front cover of the automobile again, so that secondary damage is caused. At present, two active safety protection systems for a pedestrian collided with the front of an automobile are mainly used, wherein one system is to lift the rear part of a front cover of the automobile to a designed height instantly so as to buffer the collision force between a human body and the front cover when the human body falls on the front cover, and therefore the head injury of the collided pedestrian is reduced. At present, the trigger in the market utilizes gunpowder to generate thrust to push a piston rod structure, and the structure of the trigger mainly comprises a wire harness, a fixed support, a bar code label, an igniter, an injection molding body, gas generation explosive particles, a gas generation cartridge case, a filtering structure, a piston rod, a sealing ring, a shell, a metal end cover, a plastic end cap and the like, wherein the wire harness, the fixed support, the bar code label, the igniter, the injection molding body, the gas generation explosive particles, the gas generation cartridge case, the filtering structure, the piston rod, the sealing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a simple structure, low price, the smaller trigger of automobile bonnet lifting in the twinkling of an eye of diameter.

The problem is solved through following technical scheme:

a trigger for instantly lifting a front cover of an automobile comprises an ignition mechanism, a gas production medicine box, a shell, a piston rod and a gas production medicine; the ignition mechanism is arranged at the inner lower end of the shell, a gas production medicine box is arranged at the upper end of the ignition mechanism, and gas production medicines are contained in the gas production medicine box; the upper end of the gas production medicine box is provided with a piston rod, and the upper part of the shell is provided with an opening and can accommodate the piston rod to extend out; the upper side part of the shell is provided with an exhaust hole which penetrates through the shell.

Above-mentioned trigger of automobile front shroud lifting in twinkling of an eye, the upper portion of shell is equipped with the fixed bolster, and the fixed bolster connects the automobile bonnet.

Above-mentioned trigger of automobile front shroud lifting in twinkling of an eye, the piston rod is equipped with the reducing, and the top opening part of shell inwards is equipped with and keeps off the ring with reducing complex.

According to the trigger for instantly lifting the front cover of the automobile, the top of the shell is provided with the plastic cap.

The trigger for instantly lifting the front cover of the automobile comprises a wire harness, an igniter seat, a short circuit ring and a thermosensitive material.

The utility model discloses a cooperation setting of ignition mechanism, gas production medicine box and piston, the action that lifts up at completion automobile bonnet rear portion that can be simple quick has avoided taking place because of the complicated condition that leads to trigger material with high costs of structure before, and this makes the trigger compare the structure simpler, material cost is lower with before to lift up fast, the buffering is effectual, better to pedestrian's protection effect.

Drawings

Fig. 1 is a schematic view of the cross-sectional structure of the present invention.

The list of labels in the figure is: 1. the ignition device comprises an ignition tool, 2 gas production medicine boxes, 3 shells, 4 piston rods, 5 baffle rings, 6 plastic caps, 7 fixing supports, 8 sealing rings, 9 gas production medicines, 10 wire harnesses, 11 exhaust holes and 12 ignition tool seats.

Detailed Description

As shown in fig. 1, the utility model comprises an ignition mechanism, a gas production medicine box 2, a piston rod 4, a shell 3 and a gas production medicine 9. The housing 3 is a cylindrical structure, and an ignition mechanism is arranged at the inner lower end of the housing 3. The ignition mechanism comprises an igniter 1 and an igniter base 12, the igniter base 12 is fixed at the lower end of the inside of the shell 3, and the igniter 1 is fixed at the upper end of the igniter base 12; the igniter 1 is internally provided with a thermosensitive material and a short-circuit ring, the short-circuit ring extends out of the igniter seat through a wiring harness 10, and the other end of the wiring harness 10 is connected with an ECU (electronic control unit) of a pedestrian front collision protection system of an automobile. The upper end of the igniter 1 is provided with a gas production medicine box 2, and the gas production medicine box 2 is filled with a gas production medicine 9. The gas generating agent 9 is pyrotechnic composition and consists of nitroguanidine, pentaamino tetrazole, guanidine nitrate, potassium perchlorate, basic copper nitrate and other auxiliary agents; when the igniter 1 explodes, the gas generating agent 9 can be rapidly combusted, and a large amount of nontoxic and harmless gas is generated. The upper end of the gas production medicine box 2 is provided with a piston rod 4, and the upper part of the shell 3 is provided with an opening and can accommodate the piston rod 4 to extend out. The piston rod 4 is provided with a reducing diameter which is thin at the top and thick at the bottom, a baffle ring 5 is arranged at the opening at the top of the shell 3, and the baffle ring 5 is matched with the reducing diameter and used for preventing the piston rod 4 from completely flying out. A plastic cap 6 is provided at the upper ends of the piston rod 4 and the housing 3 for covering the housing 3 and the piston rod 4. A certain gap exists between the piston rod 4 and the inner wall of the shell 3, so that the piston rod 4 can move upwards smoothly, and the lower ends of the piston rod 4 and the inner wall of the shell 3 are provided with sealing rings 8 for ensuring the air tightness of the piston rod 4 and the shell 3. An exhaust hole 11 penetrating the housing 3 is opened in the upper side portion of the housing 3, and the height position of the exhaust hole 11 is located below the piston rod 4 after being completely bounced, so that the exhaust hole 11 starts to be deflated after the piston rod 4 is completely bounced, thereby generating buffering. The exhaust holes 11 are preferably a plurality of holes arranged from top to bottom, and the aperture is gradually reduced from top to bottom; therefore, the air leakage speed is fastest after the piston rod 4 is completely bounced, and the air leakage speed is gradually reduced in the process that the piston rod 4 is pressed down, so that a better buffering effect can be provided. The upper part of the upper side exhaust hole 11 of the shell 3 is provided with a fixed bracket 7, and the other end of the fixed bracket 7 is connected with an automobile front cover system.

The trigger for the instant lifting of the front cover of the automobile comprises the following triggering processes: when a pedestrian front collision occurs, the automobile pedestrian front collision protection system ECU sends an ignition current pulse through the wire harness 10 and then detonates the igniter 1, and high-temperature and high-pressure gas generated by explosion pushes the piston rod 4 to move upwards. When the igniter 1 explodes, the gas producing medicine 9 is ignited rapidly, and a large amount of nontoxic and harmless gas produced by the rapid combustion of the gas producing medicine 9 further pushes the piston rod 4 to move upwards and drives the rear end of the front cover of the automobile to rise. After the piston rod 4 reaches the highest designed position, the rear end of the front cover of the automobile also reaches the designated height. At the moment, the head of the pedestrian is pressed down when the head of the pedestrian collides with the front cover of the automobile, the exhaust holes 11 exhaust gas outwards so as to buffer the impact on the head of the pedestrian, and the front cover resets after the exhaust holes 11 exhaust gas.

Claims

1. The utility model provides a trigger that car front shroud lifted in twinkling of an eye which characterized in that: comprises an ignition mechanism, a gas production medicine box (2), a shell (3), a piston rod (4) and a gas production medicine (9); the ignition mechanism is arranged at the inner lower end of the shell (3), the upper end of the ignition mechanism is provided with a gas production medicine box (2), and the gas production medicine box (2) is filled with gas production medicine (9); the upper end of the gas production medicine box (2) is provided with a piston rod (4), the upper part of the shell (3) is opened and the piston rod (4) can be extended out; the upper side part of the shell (3) is provided with an exhaust hole (11) which penetrates through the shell (3).

2. The trigger for the instantaneous lifting of the front cover of the automobile as claimed in claim 1, wherein: the upper portion of shell (3) is equipped with fixed bolster (7), and fixed bolster (7) are connected the automobile bonnet.

3. The trigger for the instantaneous lifting of the front cover of the automobile as claimed in claim 1, wherein: the piston rod (4) is provided with a variable diameter, and a baffle ring (5) matched with the variable diameter is inwards arranged at the opening at the top of the shell (3).

4. The trigger for the instantaneous lifting of the front cover of the automobile as claimed in claim 1, wherein: the top of the shell (3) is provided with a plastic cap (6).

5. The trigger for the instantaneous lifting of the front cover of the automobile as claimed in any one of claims 1 to 4, wherein: the ignition mechanism consists of a wire harness (10), an ignition tool (1), an ignition tool seat (12), a short circuit ring and a thermosensitive material.