CN2129265Y

CN2129265Y - Plane door integrated with stepladder

Info

Publication number: CN2129265Y
Application number: CN 92222122
Authority: CN
Inventors: 俞建荣
Original assignee: BEIJING PETRO-CHEMICAL INDUSTRY PROFESSIONAL SCHOOL
Current assignee: BEIJING PETRO-CHEMICAL INDUSTRY PROFESSIONAL SCHOOL
Priority date: 1992-05-22
Filing date: 1992-05-22
Publication date: 1993-04-07
Anticipated expiration: 2002-05-22

Abstract

The utility model provides a plane door which is used in a medium and small-sized plane to integrate a door and stepladders. The open of the plane door and the close of the plane door are realized by a combined mechanism which is composed of a collecting and releasing mechanism and a balancing mechanism, wherein, the collecting and releasing mechanism is used to meet the requirements of the position of the door moving in the air and the track of the door moving in the air; the balancing mechanism is used to balance resistance force or the torque of the resistance force, the balance resistance force or the torque of the operating resistance force is caused by the gravitation of the door and is applied on an operating staff to open and close the door, and the operating staff can easily collect the door or lower the door.

Description

Plane door integrated with stepladder

The utility model is a kind of hatch door mechanism that aircraft door and airstair are united two into one.

What home-built aircraft adopted at present is the sliding type hatch door, the airstair that the passenger need assist up and down, and opening and closing hatch door and folding and unfolding airstair is the twice program of separately carrying out, and has so not only operated inconvenience but also has influenced work efficiency.The sliding type hatch door is progressively to slip in the cabin in its opening procedure, needs slide rail and has increased the fuselage wall thickness simultaneously.In addition, hatch door is opened the back and occupy certain space in fuselage, has reduced the fuselage interior available space.Because the weight of airstair is not through overbalance, its eccentric weight will be born by operating personal, has increased labour intensity.In order to alleviate the too much burden of operating personal, often airstair do little and simple and crude, this makes troubles for again the passenger up and down.

The utility model proposes a kind of aircraft door that is mainly used in the door ladder unification of middle-size and small-size aircraft, the switching of this aircraft door is realized that by door ladder unification mechanism door ladder unification mechanism then is made up of jack and equalizing gear.Jack is in order to requirements such as the position of realizing the hatch door aerial sports and tracks, and equalizing gear then is used for balance and imposes on operation resistance or the resisting moment that operating personal opens and closes hatch door because of what the gravity of hatch door caused.Jack system is the plane hinge four bar structures of easy realization the most simply and.Equalizing gear is the box-like equalizing gear of cylindrical cam spring assembly, this equalizing gear makes the characteristic of the non-linear energy storage characteristic of spring and cylindrical cam groove curve ingenious and organically combine, effectively the moment of torsion when the operation resistance that causes of balance hatch door gravity or balance jack drive spindle (operating handle place bar) diverse location.This equalizing gear also can be used for other around the gravity of axle low-speed rotation member or the balance of moment of torsion.Door ladder unification aircraft door takes up space and is limited in the passageway that passes in and out hatch door, can not reduce the fuselage interior available space.

Door ladder unification mechanism and the external invention that the utility model proposes

US Patent 4，086，726（B.K.Moses，5／1978）

DE Patent 3265－876－G24 3145－15724

GB Patent 2111－120－B14

Compare, the folding and unfolding and the equilibrium problem of door ladder unification aircraft door have not only been solved, and designed door ladder unification mechanism is more succinct exquisite, and can make suffered working resistance of drive spindle or resisting moment in the scope of 360 degree, be able to balance, be not subjected to the influence of required balance angular range, it is constructed as accompanying drawing 1, shown in Figure 2.

Accompanying drawing 1 is a door ladder unification aircraft door opening schematic perspective view.

Accompanying drawing 2 is a door ladder unification aircraft door opening schematic side view.

Accompanying drawing 3 is a door ladder unification aircraft door closure state schematic side view.

(1)-airframe among the figure; (2)-have a hatch door of inner step; (2 ')-airstair; (3)-handrail; (41), (42), (5)-jack side link; (6)-hatch door passageway sidewall; (7)-equalizing gear.

Accompanying drawing 4 is a curved groove cylindrical cam spring balancing structural scheme of mechanism.

Accompanying drawing 5 is for having the cylindrical cam spring balancing structural scheme of mechanism of symmetrical cam profile.Comprising cam contour surface figure and cam body transparent view.

(71) are cam among the figure; (72) be driven member; (73) be drive spindle; (74) be pressure spring; T is the moment and the direction of required balance, and (75) are roller.

Below in conjunction with description of drawings embodiment of the present utility model: the jack of forming gate jointly by rod member (41), (42), (5) and hatch door (2), fuselage (1) is finished the draw-in and draw-off function of gate.The identical both sides that are arranged symmetrically in hatch door of the size of rod member (41), (42), and be installed in the two side, hatch door passageway (6); Handrail (3) can be used as the handle that opens and closes hatch door, certainly also can be at the place's of being fixedly hinged peace one handle of rod member (41) with fuselage (1), and when turning handle, rod member (41) drives the jack movement therewith, thereby makes hatch door (2) open or close.Because of the keying of hatch door (2) is to be undertaken by the handle that is fixed on the bar (41), so bar (41) also claims drive spindle.Look actual conditions bar (42) or bar (5) and also can be used as the drive spindle that handle is installed.

Equalizing gear (7) is installed in the hinged place of drive spindle (41) or drive spindle (42) and fuselage (1), also can respectively adorn an equalizing gear in this two hinged place simultaneously certainly, and this will decide as the case may be.Cylindrical cam (71) and drive spindle (41) or (42) are affixed and coaxially rotate around the hinge center, driven member (72) is fixing, its end roller 75 because of the rotation of cam (71) along the relative motion of cam plug helix, driven member (72) hinders the rotation of cam 71, and produces a moment of torsion opposite with cam (71) hand of rotation with the moment of torsion of balance drive spindle or the gravity of hatch door.

Below do an into explanation with regard to equalizing gear:

Figure 4 shows that the box-like equalizing gear of a kind of cylindrical cam spring assembly.Cam (71) is the cylindrical cam that is made of the continuous complex curve Surface Groove of an axial space, and hunting gear (72) can be along the cam path relative motion, and roller or other antifriction apparatus are equipped with in its end, to reduce friction drag and the wearing and tearing that produce because of relative motion.Driven member (72) and cam (71) but also coaxial cooperation, both have common axis like this, just can choose one wantonly and maintain static, another can rotate relatively around common axis line, what person fixes and will be determined on a case-by-case basis among both so.

Fig. 5 is the cylindrical cam spring balancing structural scheme of mechanism with symmetrical cam profile, it is stressed more shown in Figure 4 the sort of for well, has certain supremacy clause, but its can balance angle limits within the scopes of 180 degree, if the angle of required balance surpasses 180 degree, then should adopt equalizing gear shown in Figure 4.

The utility model fixedly illustrates the principle of work of this combination mechanism with driven member (72).When the time spent of doing that cam (71) is subjected to moment T, the driven member (72) of being close to cam (71) groove inside face just produces the moment T of a counteraction cylindrical cam _FWith balancing torque T, and change along with the variation of moment T, also because the rotation of cam, the cam path different parts contacts with driven member (72), and make the cam sway, spring (74) correspondingly extends and shortens and store and release energy, and we can say that therefore this equalizing gear is to produce balancing torque by means of the effect of two sides of cam path and driven member (72).For making the suffered moment of torsion of cam be able to balance, just must make cam path shape profile satisfy certain rule, so that along with the carrying out that moves, the energy that Hookean spring is stored can overcome the merit that moment T is done.Open and close to guarantee that hatch door is stable, alleviate labor intensity of operating personnel.

Claims

1, a kind of door ladder unification aircraft door of being made up of hatch door (2) and airstair (2 ') that is mainly used in medium and small aircraft, it is characterized in that: the switching of aircraft door is realized that by door ladder unification mechanism door ladder unification mechanism is made up of jack and equalizing gear.

2, door ladder unification aircraft door according to claim 1 is characterized in that: jack system is made up of fuselage (1), hatch door (2), the bar (41), (42), (5) that are connected with fuselage.

3, door ladder unification aircraft door according to claim 1, it is characterized in that: equalizing gear is made up of garden post cam (71), cam follower (72) and spring (74), and equalizing gear is installed in the hinged place of jack drive spindle and fuselage.Garden post cam (71), cam follower (72) both one of affixed with this side link at fuselage hinge place, and with this side link around the coaxial rotation in hinge center, another part and fuselage are affixed.Roller (75) is equipped with in the end of driven member (72), the friction and wear when reducing along the cam path relative motion.