CN204250371U - A kind of variable load energy absorption device of helicopter crash proof seat - Google Patents
A kind of variable load energy absorption device of helicopter crash proof seat Download PDFInfo
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- CN204250371U CN204250371U CN201420723701.3U CN201420723701U CN204250371U CN 204250371 U CN204250371 U CN 204250371U CN 201420723701 U CN201420723701 U CN 201420723701U CN 204250371 U CN204250371 U CN 204250371U
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Abstract
The utility model relates to a kind of variable load energy absorption device of helicopter crash proof seat, comprise rolled tube, upset pipe, support tube, connecting bushing, steel ball, top connection, strut member, pull bar, pull head, block, steel ball fixed outer cylinder, lower adaptor and control hand wheel, upset pipe is welded on support tube inside, the upper end of support tube is welded on the inside of connecting bushing, lower end is welded on support tube, pull bar is connected with pull head through strut member, rolled tube is closed by steel ball fixed outer cylinder, lower adaptor is connected with pull bar through the hole of steel ball fixed outer cylinder, steel ball is enclosed in the hole of steel ball fixed outer cylinder by block, the face that block is relative with steel ball is inclined-plane, steel ball gives prominence to the part of steel ball fixed outer cylinder inside face in the depressed part on rolled tube top, spring is provided with below block.The utility model variable load energy absorption device according to its energy-absorbing load of the weight regulation of occupant, can guarantee that the overload that all occupants bear is no more than the Human Tolerance limit.
Description
Technical field
The utility model relates to energy absorption device, more particularly, relates to a kind of variable load energy absorption device of helicopter crash proof seat.
Background technology
Because helicopter flight height is low, before improper ground connection, the reaction time of pilot control action is short, easy to be born impaired, therefore, requires that helicopter possesses anti-crash performance.In the anti-crash technology of helicopter except adopting energy-absorbing alighting gear, anti-crash head and airframe structure, anti-crash fuel tank and rotor structure, most important is exactly crash proof seat, and energy absorption device is the critical component of helicopter crash proof seat.
What existing helicopter crash proof seat generally adopted is surely carry energy absorption device, can only provide best protection, make it move downward with the deceleration/decel being not more than 14.5G for the occupant of the 50th hundredths weight.But, surely carry energy absorption device for too gently or the protection of too heavy occupant but so ineffective; For the occupant of Heavy Weight, energy-absorbing load is too little, and has potential seat to break through the danger on helicopter floor; And lightweight occupant can not make full use of actv. impact stroke, may be subject to impacting than the higher deceleration/decel of anticipation.Surely carry occupant's narrow application range of energy absorption device, best overload protection can not be provided for all occupants.
Summary of the invention
The technical problems to be solved in the utility model is, provides a kind of variable load energy absorption device of helicopter crash proof seat of adjustable energy-absorbing load.
The utility model solves the technical scheme that its technical matters adopts: the variable load energy absorption device constructing a kind of helicopter crash proof seat, comprises rolled tube, upset pipe, support tube, connecting bushing, steel ball, top connection, strut member, pull bar, pull head, block, steel ball fixed outer cylinder, lower adaptor and control hand wheel, described upset pipe is welded on support tube inside, the depressed part of described pull head is bonded in upset pipe upper end, the upper end of described support tube is welded on the inside of connecting bushing, described top connection is connected with described connecting bushing, the upper end of described rolled tube is welded on the outside of connecting bushing, lower end is welded on support tube, described pull bar is connected with pull head through strut member, rolled tube is closed by described steel ball fixed outer cylinder, described lower adaptor is connected with pull bar through the hole of steel ball fixed outer cylinder, steel ball is enclosed in the hole of steel ball fixed outer cylinder by described block, the face that described block is relative with described steel ball is inclined-plane, steel ball gives prominence to the part of steel ball fixed outer cylinder inside face in the depressed part on rolled tube top, spring is provided with below described block, block can freely up and down move, described control hand wheel is connected with steel ball fixed outer cylinder by screw thread.
In such scheme, variable load energy absorption device also comprises the locating dowel pin that limit stop is rotated, and described locating dowel pin is arranged on described block through the bar-shaped trough on steel ball fixed outer cylinder.
In such scheme, variable load energy absorption device also comprises the stop screw that restriction steel ball fixed outer cylinder rotates, and the bar-shaped trough that described stop screw is each passed through on steel ball fixed outer cylinder is arranged on support tube.
In such scheme, the surface of described rolled tube scribbles lubricant.
In such scheme, the inclined-plane of described block scribbles lubricant.
Implement the variable load energy absorption device of helicopter crash proof seat of the present utility model, there is following beneficial effect:
At initial condition, steel ball overhang is maximum, and tightly push down the recessed position in rolled tube, cw turns control hand wheel, and block moves downward and Compress Spring, and move downward in process at block, steel ball overhang reduces gradually; Conter clockwise turns control hand wheel, and block is upward movement under spring upwards application force, and in block upward movement process, steel ball overhang increases gradually.Steel ball overhang is larger, and the radial deformation that during energy absorption device work, steel ball produces on rolled tube is larger, and energy-absorbing load is larger.Otherwise steel ball overhang is less, the radial deformation that during energy absorption device work, steel ball produces on rolled tube is less, and energy-absorbing load is less.Therefore, the utility model is by turning the size of control hand wheel and adjustable energy-absorbing load, easy to use.
The utility model variable load energy absorption device can according to its energy-absorbing load of the weight regulation of occupant; the male occupant that can be the 95th hundredths provides best protection to the female occupant of the 5th hundredths; make it all move downward with the deceleration/decel being not more than 14.5G, guarantee that the overload that all occupants bear is no more than the Human Tolerance limit.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the front view of the variable load energy absorption device of the utility model helicopter crash proof seat;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 a-Fig. 3 c is the control process schematic diagram of steel ball overhang;
Fig. 4 is the structural representation after the work of variable load energy absorption device.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe detailed description of the invention of the present utility model in detail.
The utility model variable load energy absorption device is the energy absorbing component for helicopter crash proof seat, and it comprises rolled tube 1, upset pipe 2, support tube 3, connecting bushing 4, steel ball 5, top connection 6, strut member 7, pull bar 8, spring 9, pull head 10, stop screw 11, block 12, steel ball fixed outer cylinder 13, locating dowel pin 14, lower adaptor 15, control hand wheel 16.
As shown in Figure 1 and Figure 2, top connection 6 is connected with the main framing of helicopter crash proof seat, and lower adaptor 15 is connected with the chair basin of helicopter crash proof seat.It is inner that upset pipe 2 is welded on support tube 3, and pull head 10 depressed area is coated with and is adhesive in upset pipe 2 upper end, and the upper end of support tube 3 is welded on the inside of connecting bushing 4.The upper end of rolled tube 1 is welded on the outside of connecting bushing 4, and lower end is welded on support tube 3.The material of rolled tube 1, upset pipe 2 will have excellent rigidity and ductility.Pull bar 8 is connected with pull head 10 by screw thread through strut member 7.Rolled tube 1 is closed by steel ball fixed outer cylinder 13.Four bar-shaped troughs 17 that four stop screws 11 are each passed through on steel ball fixed outer cylinder 13 are arranged on support tube 3, guarantee that steel ball fixed outer cylinder 13 can not rotate, and guarantee that it can not hinder steel ball fixed outer cylinder 13 straight-line motion downwards.Lower adaptor 15 is threaded with pull bar 8 through the hole of steel ball fixed outer cylinder 13.Four steel balls 5 are enclosed in four holes of steel ball fixed outer cylinder 13 by block 12, and steel ball 5 gives prominence to the part of steel ball fixed outer cylinder 13 inside face in the depressed part on rolled tube 1 top.Have spring 9 below block 12, block 12 can freely up and down move.Locating dowel pin 14 is arranged on block 12 through the bar-shaped trough on steel ball fixed outer cylinder 13, the degree of freedom of locating dowel pin 14 only limit stop 12 rotation direction.Control hand wheel 16 is connected with steel ball fixed outer cylinder 13 by screw thread.
The variable load principle of work of this device is that occupant drives control hand wheel 16 according to the weight sum of the body weight of self and its belongings, the degree of depth making it produce radial deformation on rolled tube 1 by regulating the difference of steel ball 5 overhang is different, thus reaches the object of variable load.As shown in Fig. 3 a-Fig. 3 c, there is inclined-plane 18 block 12 inside, and inclined-plane 18 determines with the relative position of steel ball 5 distance that steel ball fixed outer cylinder 13 inside face given prominence to by steel ball 5.Lubricant can be coated in the surface on the inclined-plane of rolled tube 1 and block 12.Steel ball 5 overhang is larger, and the radial deformation that during energy absorption device work, steel ball 5 produces on rolled tube 1 is larger, and energy-absorbing load is larger.Otherwise steel ball 5 overhang is less, the radial deformation that during energy absorption device work, steel ball 5 produces on rolled tube 1 is less, and energy-absorbing load is less.Cw turns control hand wheel 16 and block 12 can be driven to move downward, and when block 12 moves to extreme lower position, steel ball 5 will depart from completely with the depressed part of rolled tube 1.Conter clockwise turns control hand wheel 16, and block 12 is upward movement under spring 9 acts on, and when block 12 moves to extreme higher position, steel ball 5 tightly will prop up the depressed part of rolled tube 1.
As shown in Figure 4, when variable load energy absorption device works, when steel ball 5 and steel ball fixed outer cylinder 13 entirety move downward, upset pipe 2 overturns simultaneously, at first, static friction is produced between steel ball 5 and rolled tube 1, steel ball 5 fine motion after a while, then, static friction is converted into friction of rolling, steel ball 5 squeezing roll pressure pipe 1, makes it produce 4 uniform radial depressions portions, road.In the process, there are two kinds of different distortion in rolled tube 1 and upset pipe 2 simultaneously: one is the axial deformation overturning pipe 2, by being inverted, makes inside and outside to overturn; Two is make rolled tube 1 produce radial deformation by steel ball 5 effect.The utility model energy absorption device absorbs energy by the plastic deformation overcoming material.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, also can make a lot of form, these all belong within protection of the present utility model.
Claims (5)
1. the variable load energy absorption device of a helicopter crash proof seat, it is characterized in that, comprise rolled tube (1), upset pipe (2), support tube (3), connecting bushing (4), steel ball (5), top connection (6), strut member (7), pull bar (8), pull head (10), block (12), steel ball fixed outer cylinder (13), lower adaptor (15) and control hand wheel (16);
It is inner that described upset pipe (2) is welded on support tube (3), the depressed part of described pull head (10) is bonded in upset pipe (2) upper end, the upper end of described support tube (3) is welded on the inside of connecting bushing (4), described top connection (6) is connected with described connecting bushing (4), the upper end of described rolled tube (1) is welded on the outside of connecting bushing (4), lower end is welded on support tube (3), described pull bar (8) is connected with pull head (10) through strut member (7), rolled tube (1) is closed by described steel ball fixed outer cylinder (13), described lower adaptor (15) is connected with pull bar (8) through the hole of steel ball fixed outer cylinder (13), steel ball (5) is enclosed in the hole of steel ball fixed outer cylinder (13) by described block (12), the face that described block (12) is relative with described steel ball (5) is inclined-plane (18), the part of outstanding steel ball fixed outer cylinder (13) inside face of steel ball (5) is in the depressed part on rolled tube (1) top, described block (12) below is provided with spring (9), block (12) can freely up and down move, described control hand wheel (16) is connected with steel ball fixed outer cylinder (13) by screw thread.
2. the variable load energy absorption device of helicopter crash proof seat according to claim 1, it is characterized in that, variable load energy absorption device also comprises the locating dowel pin (14) that limit stop (12) is rotated, and described locating dowel pin (14) is arranged on described block (12) through the bar-shaped trough on steel ball fixed outer cylinder (13).
3. the variable load energy absorption device of helicopter crash proof seat according to claim 1, it is characterized in that, variable load energy absorption device also comprises the stop screw (11) that restriction steel ball fixed outer cylinder (13) rotates, and the bar-shaped trough (17) that described stop screw (11) is each passed through on steel ball fixed outer cylinder (13) is arranged on support tube (3).
4. the variable load energy absorption device of helicopter crash proof seat according to claim 1, is characterized in that, the surface of described rolled tube (1) scribbles lubricant.
5. the variable load energy absorption device of helicopter crash proof seat according to claim 1, is characterized in that, the inclined-plane (18) of described block (12) scribbles lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420723701.3U CN204250371U (en) | 2014-11-27 | 2014-11-27 | A kind of variable load energy absorption device of helicopter crash proof seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420723701.3U CN204250371U (en) | 2014-11-27 | 2014-11-27 | A kind of variable load energy absorption device of helicopter crash proof seat |
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| CN204250371U true CN204250371U (en) | 2015-04-08 |
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| CN201420723701.3U Active CN204250371U (en) | 2014-11-27 | 2014-11-27 | A kind of variable load energy absorption device of helicopter crash proof seat |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830108A (en) * | 2017-11-23 | 2018-03-23 | 航宇救生装备有限公司 | A kind of anti-creep rolling-type energy absorber that can be combined with seat mobile jib |
| CN109376400A (en) * | 2018-09-28 | 2019-02-22 | 湖北文理学院 | Crash proof seat energy absorber key parameter determines method and device |
| CN111572781A (en) * | 2020-04-27 | 2020-08-25 | 北京安达维尔航空设备有限公司 | Plate-type energy-absorbing crash-resistant seat |
| CN112141344A (en) * | 2020-10-14 | 2020-12-29 | 航宇救生装备有限公司 | Crash-resistant seat with adjustable backrest angle |
| CN112224420A (en) * | 2020-10-14 | 2021-01-15 | 航宇救生装备有限公司 | Crash-resistant seat capable of changing load and absorbing energy |
| CN113562179A (en) * | 2021-08-30 | 2021-10-29 | 航宇救生装备有限公司 | Crash-resistant seat employing extruded tube energy absorber |
-
2014
- 2014-11-27 CN CN201420723701.3U patent/CN204250371U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830108A (en) * | 2017-11-23 | 2018-03-23 | 航宇救生装备有限公司 | A kind of anti-creep rolling-type energy absorber that can be combined with seat mobile jib |
| CN107830108B (en) * | 2017-11-23 | 2023-11-21 | 航宇救生装备有限公司 | Creep-resistant rolling energy absorber capable of being combined with main rod of seat |
| CN109376400A (en) * | 2018-09-28 | 2019-02-22 | 湖北文理学院 | Crash proof seat energy absorber key parameter determines method and device |
| CN111572781A (en) * | 2020-04-27 | 2020-08-25 | 北京安达维尔航空设备有限公司 | Plate-type energy-absorbing crash-resistant seat |
| CN112141344A (en) * | 2020-10-14 | 2020-12-29 | 航宇救生装备有限公司 | Crash-resistant seat with adjustable backrest angle |
| CN112224420A (en) * | 2020-10-14 | 2021-01-15 | 航宇救生装备有限公司 | Crash-resistant seat capable of changing load and absorbing energy |
| CN112224420B (en) * | 2020-10-14 | 2023-12-05 | 航宇救生装备有限公司 | Crash-resistant seat capable of changing load and absorbing energy |
| CN112141344B (en) * | 2020-10-14 | 2024-04-09 | 航宇救生装备有限公司 | Anti-crash seat with adjustable backrest angle |
| CN113562179A (en) * | 2021-08-30 | 2021-10-29 | 航宇救生装备有限公司 | Crash-resistant seat employing extruded tube energy absorber |
| CN113562179B (en) * | 2021-08-30 | 2023-10-27 | 航宇救生装备有限公司 | Crash-resistant seat using extruded tube energy absorber |
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