阅读说明：本技术 一种板式吸能抗坠毁座椅 (Plate-type energy-absorbing crash-resistant seat ) 是由 杨林 王小明 薛美萍 白林峰 王荣祥 李昌 林赞敏 于 2020-04-27 设计创作，主要内容包括：本发明涉及直升机座椅设计制造技术领域,公开了一种板式吸能抗坠毁座椅,包括椅盆和椅腿,椅腿设有C型结构槽和抗坠毁组件；抗坠毁组件位于C型结构槽内；抗坠毁组件包括吸能板、滑动板和高度调节锁定板,吸能板位于滑动板和高度调节锁定板之间；高度调节锁定板开设有高度调节锁定孔,高度调节锁定板通过高度调节锁定孔与椅腿连接,吸能板包括固定端和活动端,吸能板的固定端与高度调节锁定板的下端连接；吸能板的活动端与滑动板连接；所述滑动板的两侧与所述高度调节锁定板相互卡合,滑动板通过螺栓与椅盆连接。本发明吸能平稳可控,减小了常规翻转管或扩张管式吸能器对空间的占用,同时提升了加工工艺性,提高了制作成品率。(The invention relates to the technical field of helicopter seat design and manufacture, and discloses a plate type energy-absorbing crash-resistant seat which comprises a seat basin and seat legs, wherein the seat legs are provided with C-shaped structural grooves and crash-resistant components; the anti-crash component is positioned in the C-shaped structural groove; the anti-crash assembly comprises an energy absorption plate, a sliding plate and a height adjusting locking plate, wherein the energy absorption plate is positioned between the sliding plate and the height adjusting locking plate; the height adjusting locking plate is provided with a height adjusting locking hole, the height adjusting locking plate is connected with the chair legs through the height adjusting locking hole, the energy absorbing plate comprises a fixed end and a movable end, and the fixed end of the energy absorbing plate is connected with the lower end of the height adjusting locking plate; the movable end of the energy absorption plate is connected with the sliding plate; the two sides of the sliding plate are mutually clamped with the height adjusting locking plate, and the sliding plate is connected with the chair basin through bolts. The energy absorption device has stable and controllable energy absorption, reduces the occupation of the conventional overturn pipe or expansion pipe type energy absorber to the space, simultaneously improves the processing manufacturability and improves the manufacturing yield.)

1. A plate-type energy-absorbing crash-resistant seat comprises a seat basin and seat legs, and is characterized in that the seat legs are provided with C-shaped structural grooves and crash-resistant components; the anti-crash assembly is positioned in the C-shaped structure groove and can slide in the C-shaped structure groove; the anti-crash assembly comprises an energy absorption plate (8), a sliding plate (6) and a height adjusting locking plate (4), wherein the energy absorption plate (8) is positioned between the sliding plate (6) and the height adjusting locking plate (4); the height adjusting locking plate (4) is provided with a height adjusting locking hole (5), the height adjusting locking plate (4) is connected with the chair legs (3) through the height adjusting locking hole (5), and the position of the anti-crash assembly on the chair legs is limited through the height adjusting locking hole (5); the energy absorption plate (8) comprises a fixed end (1) and a movable end (2), and the fixed end (1) of the energy absorption plate (8) is connected with the lower end of the height adjusting locking plate (4); the movable end (2) of the energy absorption plate is connected with the sliding plate (6); the two sides of the sliding plate (6) are mutually clamped with the height adjusting locking plate (4), and the sliding plate (6) is connected with the chair basin through bolts.

2. The plate-type energy-absorbing crash-resistant seat according to claim 1, wherein a fixed end (1) of the energy-absorbing plate is bolted to a lower end of the height-adjusting locking plate (4); the movable end (2) of the energy absorption plate is connected with the sliding plate (6) through bolts.

3. The plate-type energy-absorbing crash-resistant seat according to claim 1 or 2, wherein the energy-absorbing plate is a metal sheet.

4. The plate-type energy-absorbing crash-resistant seat according to claim 3, wherein the upper portion of the energy-absorbing plate is curved.

Technical Field

The invention relates to the technical field of helicopter seat design and manufacture, in particular to a plate type energy-absorbing crash-resistant seat.

Background

In order to improve the survival rate of passengers, a helicopter is generally provided with an anti-crash energy-absorbing seat, a buffering energy absorber is arranged between a framework and a seat basin, and the energy absorber has good plastic deformation property, so that most of impact kinetic energy is dissipated through large plastic deformation and a damage process of a structure, the amplitude of impact force is greatly reduced, and the impact effect is slowed down.

For example, the national patent publication CN110171573A entitled "crash-resistant seat for driver of universal energy absorber and crash-resistant method" includes: the energy-saving chair comprises a framework (1), a chair basin (2), a universal energy absorber (3), a first cushion block (4), a second cushion block (5) and a connecting rod (6); the universal energy absorber (3) comprises a first circular steel plate (3-1), a second circular steel plate (3-2) and a plurality of U-shaped sheet metal parts (3-3); the universal energy absorber (3) is arranged between the chair basin (2) and the framework (1). At present, the domestic crash-resistant seat mainly adopts a turnover pipe or an expansion pipe type energy absorber, and the following problems exist in the use process:

the overturning pipe or expansion pipe type energy absorber is large in size and can only be arranged outside the seat framework, occupies space and has influence on the arrangement of the seat structure;

the influence of the thickness of the pipe wall on the starting force value of the energy absorber is large, the tolerance of the energy absorber needs to be strictly controlled, but the rejection rate and the cost are increased by improving the tolerance grade;

the manufacturing process is complex, no matter the tube is turned over or expanded, the welding process and preprocessing are needed, metal flaw detection is needed, the manufacturing period is long, the welding process has high requirements on suppliers, and the control is not easy.

Disclosure of Invention

The invention aims to provide a plate type energy-absorbing crash-resistant seat, so that the problems in the prior art are solved.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a plate-type energy-absorbing crash-resistant seat comprises a seat basin and seat legs, wherein the seat legs are provided with C-shaped structural grooves and crash-resistant components; the anti-crash component is positioned in the C-shaped structure groove and can slide in the C-shaped structure groove; the anti-crash component comprises an energy absorption plate (8), a sliding plate (6) and a height adjusting locking plate (4), wherein the energy absorption plate (8) is positioned between the sliding plate (6) and the height adjusting locking plate (4); the height adjusting locking plate (4) is provided with a height adjusting locking hole (5), the height adjusting locking plate (4) is connected with the chair legs (3) through the height adjusting locking hole (5), and the position of the crash-resistant component on the chair legs is limited through the height adjusting locking hole (5); the energy absorption plate (8) comprises a fixed end (1) and a movable end (2), and the fixed end (1) of the energy absorption plate (8) is connected with the lower end of the height adjusting locking plate (4); the movable end (2) of the energy absorption plate is connected with the sliding plate (6); the two sides of the sliding plate (6) are mutually clamped with the height adjusting locking plate (4), and the sliding plate (6) is connected with the chair basin through bolts.

Further, a fixed end (1) of the energy absorption plate is connected with a lower end bolt of a height adjusting locking plate (4); the movable end (2) of the energy absorption plate is connected with the sliding plate (6) through bolts.

Further, the energy absorption plate is a metal thin plate.

Furthermore, the upper part of the energy absorption plate is bent.

The energy absorption principle of the invention is to absorb energy by utilizing the metal plastic deformation principle. When the movable end (2) is forced to move along a set direction, namely the sliding plate (6) drives the movable end (2) of the energy absorption plate to turn downwards along the height adjusting locking plate (4), the metal material at the turning plastic deformation area (9) is subjected to plastic deformation so as to absorb energy.

When the airplane crashes, the chair basin is subjected to great impact load and moves downwards relative to the chair legs, because the fixed end (1) of the energy-absorbing plate is connected with the lower end of the height adjusting locking plate (4) and the movable end (2) of the energy-absorbing plate is connected with the sliding plate (6), under the condition of great impact load, the downward impact force of the chair basin is transferred to the sliding plate (6) through the supporting rod, the sliding plate (6) can move downwards along with the chair basin, as the movable end (2) of the energy-absorbing plate is connected with the sliding plate (6), the movable end (2) of the energy-absorbing plate can deform, the sliding plate (6) drives the movable end (2) of the energy-absorbing plate to turn downwards along the height adjusting locking plate (4), the deformation process enables the energy absorber to absorb the crash energy, reduces the acceleration of the seat basin reacting on the human body, and ensures the safety of passengers in the aircraft crash process.

The thickness and the width of the energy absorbing plate can be flexibly designed according to the specific crash resistance index requirements (such as survival rate indexes of 75%, 85%, 90%, 95% and the like) of the seat or the requirements of installation models (such as 27/29 helicopters and 23 small navigation airplanes).

The invention has the beneficial effects that: the energy absorption plate provided by the invention is formed by bending a metal thin plate with good plasticity, and connecting hole positions are prefabricated at two ends according to design requirements. The energy absorption plate not only has the characteristic that the impact force value of a conventional energy absorber is stable and controllable, but also can be embedded into a chair leg structure of the chair due to the fact that the energy absorption plate occupies a small space in the height direction, so that the space occupation is reduced, the chair is simpler to use, and the problem of equipment arrangement at the rear part of the chair is solved. In addition, the energy absorption plate is a thin plate with the thickness of 1.5-2mm, has light dead weight and good specific energy consumption, namely the energy value absorbed by the unit dead weight is high. The thickness of the energy absorption plate is less than the wall thickness fluctuation of the pipe, the manufacturing consistency is good, the yield is high, the energy absorption plate can be formed at one time by adopting a bending process, and the processing manufacturability is good. The invention solves the defects of complex manufacturing process, strict control factor and high cost of the turnover pipe or expansion pipe type energy absorber, and simultaneously, the energy absorbing plate has stable working load and small occupied space and can be conveniently integrated in the seat sliding part or the framework.

Drawings

FIG. 1 is a schematic diagram of a structure of an energy absorbing plate according to a first embodiment of the present invention.

FIG. 2 is an enlarged schematic view of a connection structure of an energy absorbing plate and a leg according to a first embodiment of the present invention.

FIG. 3 is a schematic view of the energy absorbing plate according to the first embodiment before absorbing energy.

FIG. 4 is a schematic view of a first embodiment of an energy absorbing plate after energy absorption.

1. The device comprises a fixed end, a movable end, a chair leg, a height adjusting locking plate, a height adjusting locking hole, a sliding plate, a height adjusting locking hole, an energy absorbing plate fixing hole, a height adjusting locking hole, an energy absorbing plate, a turnover plastic deformation area and a turnover plastic deformation area, wherein the fixed end.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.