RU170553U1 - Energy-absorbing device, mainly for aircraft and helicopter seats - Google Patents

Abstract

The utility model relates to the field of aircraft construction, more specifically to energy-absorbing devices used mainly for airplane and helicopter seats, and can be used to increase their reliability. The objective of this proposed utility model is to develop an energy-absorbing device, mainly for airplane and helicopter seats, having increased reliability, in addition, the design of the energy-absorbing device should ensure its uninterrupted operation when exposed to high-speed aircraft lutational loads. This task is achieved by the fact that in the energy-absorbing device, mainly for aircraft seats and helicopters, mounted on an aircraft seat containing a frame made in the form of racks, cup seats, suspension units made in the form of mounting brackets, and containing a container of energy-absorbing devices The energy-absorbing element located in it, made of a U-shaped stainless steel sheet, one end of which abuts against the container and the other connected to the bracket Nyi, the tape is made with a loop with an additional bend and is fixed on the lower bracket for fastening the bowl with the clamp and screws, while a latch is installed in the loop of the element. 2 ill.

Description

Technical field

The utility model relates to the field of aircraft construction, more specifically to energy-absorbing devices, used mainly for aircraft seats and helicopters, and can be used to increase their reliability.

State of the art

Known "Seat of an airplane with energy-absorbing elements" according to patent GB 2397865, class. B60N 2/42; B60N 2/427; B64D 11/06; B64D 25/04; F16F 7/12 of 08/04/2004. According to the patent, the chair contains a chair cup, frame, suspension units and energy absorbing nodes. The chair cup is made in the form of a back and a base attached to it. The frame is made in the form of two parallel vertical racks interconnected by horizontal rods parallel to each other. Horizontal rods are fixed at the ends of the uprights. Racks and rods are made in the form of pipes.

The energy absorbing unit comprises a metal plate and a bending device. The bending device is made in the form of a box-shaped case with rollers installed in it. The metal plate is mounted parallel to the axis of the chair. One end of the plate is mounted on a vertical rack of the frame, and the other on a horizontal rack. In this case, the plate is located in the bending device so that it interacts with all the rollers. The plate may be made of different thickness. The suspension unit is made in the form of a bracket mounted on vertical uprights, with eyes and a fastener with which the bracket is mounted on the wall of the aircraft. With the eyes, the suspension unit interacts with the bending device of the energy-absorbing unit. During overloads, the suspension unit connected to the bending device moves along the plate mounted on the chair frame, so that the movement of the suspension unit and the bending mechanism causes plastic deformation of the plate. Due to plastic deformation of the plate, energy absorption occurs.

The disadvantage of this invention is the increased metal consumption and low reliability of the energy-absorbing device, especially when exposed to lateral loads on the chair.

The closest technical solution, selected as a prototype, is the energy-absorbing seat of an aircraft according to the patent RU 2500582. According to the invention, the energy-absorbing seat of an aircraft contains a frame made in the form of racks, a seat cup, suspension units and an energy-absorbing device.

The energy-absorbing device includes a housing with a curved plate installed in it and is made in the form of a boxed part, provided with grooves for the guide racks, eyes for mounting on the frame racks, a niche for installing the plate. At the other end, the plate is fixed to the suspension assembly. Suspension nodes are made in the form of sliders movably mounted in guide racks.

The grooves are made on the walls of the housing. The niche is equipped with a stop, in which a curved U-shaped plate abuts against one end. The other end of the plate is fixed with screws on the lower slider. The housing of the energy-absorbing device is rigidly mounted on racks using eyes. The upper and lower sliders are mounted movably in the guide racks, while rigidly fixed to the chair cup with uniaxial hinges.

The disadvantages of this technical solution are the low reliability of the design of the energy-absorbing mechanism, unreliable fastening method, unreliable fastening of the tape through the use of a threaded connection and the rapid wear of the energy-absorbing mechanism.

Utility Model Essence

The objective of this proposed utility model is the development of an energy-absorbing device, mainly for aircraft seats and helicopters, with increased reliability.

In addition, the design of the energy-absorbing device should ensure its uninterrupted operation when exposed to high operational loads on the aircraft.

This object is achieved in that in an energy-absorbing device, mainly for airplane and helicopter seats, mounted on an aircraft seat, comprising a frame made in the form of struts, a cup of a chair, suspension units made in the form of brackets, and containing a container of the energy-absorbing device located in it is an energy-absorbing element made of a U-shaped stainless steel sheet, one end of which abuts against the container, and the other is connected to the mounting bracket, the tape is made with etley with additional limb and fixed to the lower arm mounting seat bowl via clamp and screws, wherein the loop element is installed in the lock.

This design of the container of the energy-absorbing device can improve the reliability of the energy-absorbing mechanism.

In addition, the fixing of the tape in the node of the energy-absorbing element is carried out by means of a clip mounted on the rack of the chair with screws. This embodiment of the fastening of the tape in the node of the energy-absorbing element allows to increase the fatigue strength and reliability of the fastening of the tape in operation due to the elimination of threaded fastening with screws and holes for them.

List of drawings

The utility model is illustrated by drawings, in which:

FIG. 1 shows a side view of a chair frame rack, with the chair cup removed;

FIG. 2 shows a lower bracket for attaching a bowl chair with an energy absorbing device.

Utility Model Implementation

The energy-absorbing seat of an aircraft contains a frame made in the form of racks 1-a, 1-b (Fig. 1), a seat cup (not shown in the drawing), suspension units made in the form of mounting brackets, and an energy-absorbing device. The mounting brackets 2, 3 (Fig. 1) are made in the form of sliders, movably mounted in the guide racks. The racks are equipped with guides with an energy-absorbing device rigidly installed in each of them.

The energy-absorbing device includes a container 4 (Fig. 1, 2) made of HGSA steel 30 with an anti-corrosion coating. The container 4 is a bracket that covers the guide surface of the rack. In the upper part of the container has eyes and through them pivotally mounted on the rack using the axis 5 (Fig. 2). The axis is fixed with a washer.

An energy-absorbing element 6 is installed inside the container (Fig. 2). It is made of 1.5 mm thick stainless steel sheet. The element has a U-shape, one end of which is fixed on the lower mounting bracket. The free end in turn abuts against the container.

At the fixed end, the tape is made with a loop with an additional bend and is fixed to the lower bracket of the fastening 3 (Fig. 1, 2) of the chair seat using the clamp 7 (Fig. 2) and two screws, while the latch 8 is installed in the loop of the element (Fig. 2).

The energy-absorbing element of the helicopter seat is as follows.

In an emergency landing, the inertial load from a seated person is perceived by the bowl of the chair and transmitted through the bolts of the bowl to the upper and lower mounting brackets. The brackets begin to slide down the guide surface, while the tape is pulled out of the container and due to deformation reduces the load on the chair and the person.

Due to the fact that the container is fixed on the rack, and the groove in which the energy-absorbing element is placed does not allow it to bend, plastic deformation of the element occurs and, accordingly, the shock energy is quenched.

Claims (1)

An energy-absorbing device, mainly for airplane and helicopter seats, mounted on an aircraft seat made with a frame in the form of racks, a cup of a chair, suspension units made in the form of mounting brackets, and containing an energy-absorbing device container with an energy-absorbing element located in it made of stainless steel sheet U-shaped steel, one end of which abuts against the container, and the other connected to the mounting bracket, characterized in that the tape is made with a loop with an additional o bend and fixed on the lower bracket for fastening the bowl of the chair with the clamp and screws, while the latch is installed in the loop of the element.

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