Seat energy absorber using rolling pipe

Abstract

The utility model belongs to the technical field of seats, and particularly relates to a seat energy absorber using a turnup pipe, which comprises an inner sleeve and an outer sleeve sleeved outside the inner sleeve, an inner sleeve connecting lug and an outer sleeve connecting lug are respectively arranged at the outer ends of the inner sleeve and the outer sleeve, the inner sleeve and the outer sleeve are both made of carbon fiber materials, and the turnup pipe is arranged in the outer sleeve. A layer of stainless steel sleeve is arranged on the outer surface of the inner sleeve, one end or two ends of the stainless steel sleeve is / are provided with a turnup pipe which is formed by firstly flanging outwards and then flanging, and the outer surface of the turnup pipe is connected with the inner surface of the outer sleeve in a bonding mode. The energy absorber has no influence on passengers and the environment, is low in manufacturing, mounting and maintaining cost, light in weight and high in strength, and is suitable for aero seats.

Description

Technical Field

[0001] The utility model belongs to the technical field of seats, and particularly relates to a seat energy absorber using a rolled tube. Background Art

[0002] In recent years, the aircraft market has been booming. Such aviation seats need to be designed specifically according to different dynamic impact load requirements in relevant civil aviation regulations. When the belly of the aircraft impacts the ground or water surface, a large deceleration curve will be transmitted to the human body through the seat, reducing the falling speed of the human body to zero. Considering the human body's tolerance limit, it is necessary to install an energy absorber on the seat to absorb the energy exceeding the human body's tolerance limit, so as to avoid damage to the human spine and other parts and ensure the safety of the crew in case of an accident. Summary of the Invention

[0003] The purpose of the utility model is to provide a seat energy absorber using a rolled tube, which can absorb impact energy and reduce harm to the crew.

[0004] The purpose of the utility model is solved as follows:

[0005] A seat energy absorber using a rolled tube includes an inner sleeve and an outer sleeve sleeved outside the inner sleeve. Inner sleeve lugs and outer sleeve lugs are respectively arranged at the outer ends of the inner sleeve and the outer sleeve. Both the inner sleeve and the outer sleeve are made of carbon fiber material. A layer of stainless steel sleeve is arranged on the outer surface of the inner sleeve. Rolled tubes formed by first turning the edge outwards and then turning the edge inwards are arranged at one or both ends of the stainless steel sleeve. The outer surface of the rolled tube is adhesively bonded to the inner surface of the outer sleeve. The size of the adhesive bonding connection is selected according to the force in the expected working condition and the shear strength of the glue, and the size of the bonding area is selected to ensure the energy absorption effect achieved by the plastic deformation of the rolled tube after being impacted.

[0006] As a further optimization of the above technical solution of the utility model, the inner sleeve and the stainless steel sleeve are adhesively bonded.

[0007] As a further optimization of the above technical solution of the utility model, a gap is arranged between the stainless steel sleeve and the turned-in edge.

[0008] As a further optimization of the above technical solution of the utility model, the length of the turned-in edge is one-half to one-fifteenth of the length of the inner sleeve. Energy-absorbing prepregs are laid on part or all of the area of the rolled tube. The prepregs are composite materials such as carbon fiber and glass fiber.

[0009] As a further optimization of the above technical solution of the present utility model, the inner sleeve is a first cylindrical body. One end of the first end cap is integrally formed with a first ear, and the periphery of the other end is integrally formed with a first mounting ring. The first mounting ring is sleeved on the outer surface of one end of the first cylindrical body and is adhesively connected.

[0010] As a further optimization of the above technical solution of the present utility model, there is a certain distance between the outer end of the curling tube and the end of the first cylindrical body on the side of the inner sleeve ear.

[0011] As a further optimization of the above technical solution of the present utility model, the outer sleeve is a second cylindrical body. One end of the second end cap is integrally formed with a second ear, and the periphery of the other end is integrally formed with a second mounting ring. The second mounting ring is sleeved on the outer surface of one end of the cylindrical body and is adhesively connected.

[0012] As a further optimization of the above technical solution of the present utility model, the mounting surfaces of the first ear and the second ear are parallel or perpendicular to each other.

[0013] As a further optimization of the above technical solution of the present utility model, the outer sleeve ear is fixed on the component in the seat back that needs to absorb energy, and the inner sleeve ear is fixed on the fixed component of the seat.

[0014] As a further optimization of the above technical solution of the present utility model, the inner sleeve ear is fixed on the component in the seat back that needs to absorb energy, and the outer sleeve ear is fixed on the fixed component of the seat.

[0015] The advantages of the present utility model compared with the prior art are as follows:

[0016] 1. Safety: The present utility model can start to absorb energy under specific impact stress and protect the human spine during the whole impact process.

[0017] 2. Stability: During the impact process, the present utility model can maintain an appropriate platform stress with basically no fluctuation.

[0018] 3. Designability: The present utility model can combine the basic parts according to different design conditions and is applicable to tensile and compression type curling tube energy absorbers.

[0019] 4. Irreversible energy conversion: During the whole energy absorption process of the present utility model, the human body kinetic energy is converted into heat energy and released through the plastic deformation of the curling tube material, and it has no impact on the occupants and the environment.

[0020] 5. Cost and installation: The structure of the present utility model is simple, and the manufacturing, installation and maintenance costs are low.

[0021] 6. Light weight and high strength: Compared with all-metal materials, the carbon fiber material used in this utility model has a high specific strength. When used as the sleeve material, it can significantly reduce the weight and prevent the sleeve itself from stretching due to insufficient strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional schematic diagram in which the mounting surfaces of the first lug and the second lug of this utility model are perpendicular to each other.

[0023] Figure 2 is a front view in which the mounting surfaces of the first lug and the second lug of this utility model are perpendicular to each other.

[0024] Figure 3 is a top view in which the mounting surfaces of the first lug and the second lug of this utility model are perpendicular to each other.

[0025] Figure 4 is Figure 3 a sectional view taken along line A-A of

[0026] Figure 5 is Figure 4 an enlarged view of part C of

[0027] Figure 6 is a front view in which the mounting surfaces of the first lug and the second lug of this utility model are parallel to each other.

[0028] Figure 7 is Figure 6 a sectional view taken along line B-B of

[0029] Figure 6 and Figure 7 also shows the process of the hand deformation of the rolled-up tube.

[0030] Figure 8 is a schematic diagram of the specific modulus and specific strength of different types of fibers and traditional bulk fibers (the ratio is the response quantity divided by the density). DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following further describes this utility model with specific embodiments in conjunction with the drawings. Refer to Figures 1 - 8 :

[0032] A seat energy absorber using a rolled-up tube, including an inner sleeve 30 and an outer sleeve 10 sleeved outside the inner sleeve 30. Inner sleeve lugs 40 and outer sleeve lugs 20 are respectively arranged at the outer ends of the inner sleeve 30 and the outer sleeve 10. Both the inner sleeve 30 and the outer sleeve 10 are made of carbon fiber material. A layer of stainless steel sleeve 50 is arranged on the outer surface of the inner sleeve 30. One end or both ends of the stainless steel sleeve 50 are provided with a rolled-up tube 53 formed by first turning out the flange 51 and then turning out the flange 52. The outer surface of the rolled-up tube 53 is adhesively bonded and connected to the inner surface of the outer sleeve 10.

[0033] As a further optimization of the above technical solution of the present utility model, the inner sleeve 30 and the stainless steel sleeve 50 are adhesively connected with an adhesive.

[0034] As a further optimization of the above technical solution of the present utility model, a gap L4 is provided between the stainless steel sleeve 50 and the rear flanging 52, and this gap can be obtained by calculation or test according to the radius and wall thickness of the curling pipe and the energy and energy absorption stroke under specific working conditions.

[0035] As a further optimization of the above technical solution of the present utility model, the length L2 of the rear flanging 52 is one-half to one-fifteenth of the length L1 of the inner sleeve 30, and this distance is determined according to the strength of the adhesive and the magnitude of the impact force. The part or all areas of the curling pipe are covered with energy-absorbing prepreg.

[0036] As a further optimization of the above technical solution of the present utility model, the inner sleeve 30 is a first cylindrical body. One end of the first end cap 43 is integrally formed with a first ear 44, and the periphery of the other end is integrally formed with a first mounting ring 42. The first mounting ring 42 is sleeved on the outer surface of one end of the first cylindrical body and adhesively connected.

[0037] As a further optimization of the above technical solution of the present utility model, there is a certain distance L3 between the outer end of the curling pipe 53 and the end of the first cylindrical body on the side of the inner sleeve ear 40, forming an elastic deformation space for the curling pipe 53.

[0038] As a further optimization of the above technical solution of the present utility model, the outer sleeve 10 is a second cylindrical body. One end of the second end cap 23 is integrally formed with a second ear 24, and the periphery of the other end is integrally formed with a second mounting ring 22. The second mounting ring 22 is sleeved on the outer surface of one end of the cylindrical body and adhesively connected.

[0039] As a further optimization of the above technical solution of the present utility model, the mounting surfaces 21 and 41 of the outer sleeve ear 20 and the inner sleeve ear 40 are parallel or perpendicular to each other to meet different connection requirements.

[0040] As a further optimization of the above technical solution of the present utility model, the outer sleeve ear 20 is fixed on the component of the seat that needs energy absorption, and the inner sleeve ear 40 is fixed on the fixed component of the seat.

[0041] As a further optimization of the above technical solution of the present utility model, the inner sleeve ear 40 is fixed on the component of the seat that needs energy absorption, and the outer sleeve ear 20 is fixed on the fixed component of the seat.

[0042] When the impact force on the fixing component of the seat is transmitted to the roll-up tube 53 through the outer sleeve lug 20 or the inner sleeve lug 40, the impact force transmitted to the seat back after the roll-up tube 53 plastically deforms to absorb the impact energy is significantly reduced, and thus the impact on the human body is smaller, achieving the purpose of energy absorption and buffering.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still make simple substitutions or modifications of similar technologies to the technical solutions or technical features recorded in the foregoing embodiments, and these simple substitutions or modifications do not cause the essence of the corresponding technical solutions to deviate from the spirit and essence of the technical solutions of the embodiments of the present invention, and are still within the protection scope of the present invention.

Claims

1. A seat energy absorber using a roll-up tube, comprising an inner sleeve and an outer sleeve sleeved outside the inner sleeve, wherein the inner sleeve and the outer sleeve are provided with inner sleeve ears and outer sleeve ears at the outer ends thereof, respectively, and characterized in that: The inner sleeve and the outer sleeve are both made of carbon fiber material. A layer of stainless steel sleeve is provided on the outer surface of the inner sleeve. One end or both ends of the stainless steel sleeve are provided with a rolled tube formed by first flanging outward and then flanging backward. The outer surface of the rolled tube is bonded to the inner surface of the outer sleeve by an adhesive.

2. A seat energy absorber using a roll-up tube according to claim 1, characterized in that: The inner sleeve is bonded to the stainless steel sleeve by using an adhesive.

3. A seat energy absorber using a roll-up tube according to claim 1, characterized in that: A gap is arranged between the stainless steel sleeve and the rear flange.

4. A seat energy absorber using a roll-up tube according to claim 1, characterized in that: The length of the rear flange is one-half to one-fifteenth of the length of the inner sleeve, and energy-absorbing prepreg is attached to part or all of the area of ​​the rolled tube.

5. The seat energy absorber using a roll-up tube according to claim 1, characterized in that: The inner sleeve is a first cylindrical body, one end of the first end cover is integrally formed with a first ear, and the periphery of the other end is integrally formed with a first mounting ring, and the first mounting ring is sleeved on the outer surface of one end of the first cylindrical body and bonded.

6. A seat energy absorber using a roll-up tube according to claim 5, characterized in that: The outer end of the roll-up tube is at a certain distance from the end of the first cylindrical body on the ear side of the inner sleeve.

7. The seat energy absorber using a roll-up tube according to claim 1, characterized in that: The outer sleeve is a second cylindrical body, one end of the second end cover is integrally formed with a second ear, and the periphery of the other end is integrally formed with a second mounting ring, and the second mounting ring is sleeved on the outer surface of one end of the cylindrical body and bonded.

8. The seat energy absorber using a roll-up tube according to claim 1, characterized in that: The mounting surfaces of the outer sleeve lug and the inner sleeve lug are parallel or perpendicular to each other.

9. A seat energy absorber using a roll-up tube according to any one of claims 1 to 8, characterized in that: The outer sleeve ear is fixed to a component in the seat back that needs to absorb energy, and the inner sleeve ear is fixed to a fixed component of the seat.

10. A seat energy absorber using a roll-up tube according to any one of claims 1 to 8, characterized in that: The inner sleeve ear is fixed to a component in the seat back that needs to absorb energy, and the outer sleeve ear is fixed to a fixed component of the seat.

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