CN212332589U - Trigger for instantaneous lifting of automobile engine cover - Google Patents

Abstract

The utility model discloses a trigger for the instantaneous lifting of an automobile engine cover, which comprises an ignition mechanism, a gas production drug, a shell and a piston rod; the ignition mechanism consists of a wire harness, an ignition tool seat, a thermosensitive material and pyrotechnic composition; the ignition mechanism is arranged at the inner lower end of the shell, and the upper end of the ignition mechanism is provided with a gas producing agent; the piston rod is connected in the shell in a sliding manner; the piston rod is cylindrical with a sealed upper end and an opened lower end, and the gas production medicine is strip-shaped and is positioned inside the piston rod; the upper part of the shell is opened and can accommodate the piston rod to extend out. The utility model discloses a long banding product gas medicine is filled and is burnt gas production in the piston rod, and gaseous very first time drives the piston rod and pops out and outwards push up the automobile front cover from the shell, the dose measurement of product gas medicine is accurate, and the size is adjustable, is favorable to adjusting medicament release gas speed in advance, and the utility model discloses a sensitivity is high, simple structure, easily production.

Description

Trigger for instantaneous lifting of automobile engine cover

Technical Field

The utility model relates to a trigger, especially a trigger of automobile engine shroud lifting in twinkling of an eye.

Background

The automobile and safety are always the same topic, the number of dead people in car accidents is more than million worldwide every year, while the number of dead people in Chinese car accidents is the first of the world, and nearly 20 million people die of car accidents every year. The tragic phenomenon has to arouse thinking behind the tragic phenomenon, the correct knowledge of traffic safety is not popularized in every brain, and the indifference or even the invisibility of traffic rules is very important. However, besides the lack of traffic awareness, there are some reasons for the safety protection of the automobile itself. 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. Although people have achieved certain performance in the development of triggers at present, the requirements of the market are far from sufficient. The trigger structure on the market mainly comprises a wire harness, a fixed support, an igniter, an injection molding body, gas generating drug particles, a gas generating drug cylinder, 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 is connected with the whole vehicle through the trigger. This results in a complex structure, a large volume and a high cost of the trigger, which is not favorable for its popularization and use.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a trigger of automobile engine shroud lifting in the twinkling of an eye of little volume, simple structure.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a trigger for instantly lifting an automobile engine cover comprises an ignition mechanism, a gas producing medicine, a shell and a piston rod; the ignition mechanism consists of a wire harness, an ignition tool seat, a thermosensitive material and pyrotechnic composition; the ignition mechanism is arranged at the inner lower end of the shell, and the upper end of the ignition mechanism is provided with a gas producing agent; the piston rod is connected in the shell in a sliding manner; the piston rod is cylindrical with a sealed upper end and an opened lower end, and the gas production medicine is strip-shaped and is positioned inside the piston rod; the upper part of the shell is opened and can accommodate the piston rod to extend out.

According to the trigger for instantly lifting the automobile engine cover, the lower end of the piston rod is provided with the buffer arc which is bent outwards, and the piston rod on the lower side of the buffer arc is attached to the inner wall of the shell; and a limiting device matched with the buffer arc is inwards arranged at the opening at the top of the shell.

The trigger for instantly lifting the automobile engine cover cap is characterized in that a sealing ring is arranged between a shell at the lower part of the limiting device and the piston rod.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the utility model fills the long strip-shaped gas producing medicine in the piston rod and burns, the gas produced by burning the gas producing medicine drives the piston rod to pop out from the shell and outwards push the front cover of the automobile at the first time, and the reaction speed of the trigger for lifting the front cover of the automobile after the automobile is impacted is improved; the long strip-shaped gas production medicine is matched with the piston rod of the hollow barrel, so that the space required for containing the gas production medicine is reduced, the size of the trigger is reduced, and the weight of the trigger is reduced. The dose measurement of gas production medicine is accurate, and the size is adjustable, is favorable to adjusting medicament release gas speed in advance to sensitivity is high, simple structure, easily production.

In addition, the buffer arc is matched with the limiting device to prevent the piston rod from being ejected out of the shell; and the air tightness is increased through the sealing ring, the speed of ejecting the piston rod out of the shell is ensured, and the sensitivity of the trigger is improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

The reference numbers in the figures are: 1-an ignition mechanism, a wire harness 1-1, an igniter 1-2 and an igniter base 1-3; 2-gas producing medicine; 3-a housing; 4-piston rod, 4-1-buffer arc; 5-a plastic end cap; 6-sealing ring; 7-fixing the bracket; 8-a limiting device.

Detailed Description

As shown in fig. 1, the trigger for instantaneous lifting of the engine cover of the automobile comprises an ignition mechanism 1, a gas generating medicine 2, a shell 3 and a piston rod 4. The ignition mechanism 1 comprises a wire harness 1-1, an ignition tool 1-2, an ignition tool seat 1-3, a thermosensitive material, pyrotechnic composition and the like; the wire harness 1-1 is arranged at the lower end of the igniter base 1-3, and the igniter 1-2 is arranged at the upper end of the igniter base 1-3; the igniter 1-2 is filled with heat sensitive material and pyrotechnic composition. The ignition mechanism 1 is arranged in the middle of the lower end of the housing 3 and is located at the lower end of the piston rod 4. The shell 3 is a cylinder structure with two ends penetrating through, and a piston rod 4 in sliding fit is arranged in the shell. The piston rod 4 is in a cylindrical shape with a sealed upper end and an opened lower end, the gas production medicine 2 is filled in the piston rod, the gas production medicine 2 is in a long strip shape, and the dosage can be adjusted according to the weight of a front cover of a vehicle. The gas generating agent 2 is pyrotechnic composition and consists of nitroguanidine, pentaamino tetrazole, guanidine nitrate, potassium perchlorate, basic copper nitrate and other auxiliary agents; when the igniter explodes, the gas charge 2 can be rapidly combusted, and a large amount of nontoxic and harmless gas is generated to push the piston rod 4 upwards. The lower end of the piston rod 4 extends outwards to form a buffer arc 4-1; the buffering arc 4-1 is a ring body or at least two arc blocks which are uniformly distributed, and a piston rod 4 at the lower end is attached to the shell 3. 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. The top opening of the shell 3 is inwardly provided with a limiting device 8 matched with the buffering arc 4-1, and the limiting device 8 is a ring body or at least two limiting blocks vertically opposite to the arc block and is used for buffering the piston rod 4 ejected at a high speed and preventing the piston rod 4 from completely flying out. The lower end of the limiting device 8 is provided with a sealing ring 6; the sealing ring 6 is attached to the inner wall of the shell 3 and attached to the outer wall of the piston rod 4 inwards, and is used for ensuring the air tightness of the piston rod 4 during sliding. A plastic end cap 5 is arranged at the upper ends of the piston rod 4 and the housing 3, and the plastic end cap 5 is connected to the upper end of the housing 3 in a buckling mode and used for covering the housing 3 and the piston rod 4. And a fixed support 7 is arranged on the outer side of the upper part of the shell 3, and the other end of the fixed support 7 is connected with an automobile front cover system.

The trigger for the instant lifting of the automobile engine cover comprises the following triggering processes: when a pedestrian is in frontal collision, the ECU of the automobile pedestrian frontal collision protection system sends an ignition current pulse through the wire harness and then detonates the ignition tool 1-2, and high-temperature and high-pressure gas generated by explosion pushes the piston rod 4 to move upwards. When the igniter explodes, the gas generating agent 2 is rapidly ignited, and a large amount of nontoxic and harmless gas generated by rapid combustion further pushes the piston rod 4 to move upwards and simultaneously 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 this moment, the head of the collided pedestrian is pressed down when contacting with the front cover of the automobile, and the gas in the shell 3 and the piston rod 4 is compressed under the pressing-down condition, so that certain buffering is generated, and the collided pedestrian is protected in a buffering way.

Claims (3)

1. The utility model provides a trigger that car engine shroud lifted in twinkling of an eye which characterized in that: comprises an ignition mechanism (1), a gas producing medicine (2), a shell (3) and a piston rod (4); the ignition mechanism (1) is composed of a wire harness (1-1), an ignition tool (1-2), an ignition tool seat (1-3), a thermosensitive material and pyrotechnic composition; the ignition mechanism is arranged at the inner lower end of the shell (3), and the upper end of the ignition mechanism is provided with a gas producing agent (2); the piston rod (4) is connected in the shell (3) in a sliding manner; the piston rod (4) is cylindrical with a sealed upper end and an opened lower end, and the gas production drug (2) is strip-shaped and is positioned inside the piston rod (4); the upper part of the shell (3) is opened and can accommodate the piston rod (4) to extend out.

2. The trigger for instantaneous lifting of the engine cover of an automobile as claimed in claim 1, wherein: the lower end of the piston rod (4) is provided with an outward-bent buffer arc (4-1), and the piston rod (4) at the lower side of the buffer arc (4-1) is attached to the inner wall of the shell (3); and a limiting device (8) matched with the buffer arc (4-1) is inwards arranged at the opening at the top of the shell (3).

3. The trigger for instantaneous lifting of the engine cover of an automobile as set forth in claim 2, wherein: and a sealing ring (6) is arranged between the shell (3) at the lower part of the limiting device (8) and the piston rod (4).

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