CN110965870B

CN110965870B - Non-dangerous cabin door bolt lifting mechanism

Info

Publication number: CN110965870B
Application number: CN201911250217.7A
Authority: CN
Inventors: 丛家勇; 陶金库; 杨炎通; 梁东明; 张秀丽; 王健
Original assignee: AVIC Sac Commercial Aircraft Co Ltd
Current assignee: AVIC Sac Commercial Aircraft Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2021-07-09
Anticipated expiration: 2039-12-09
Also published as: CN110965870A

Abstract

The invention relates to a non-dangerous cabin door bolt lifting mechanism, wherein a door structure is provided with a bolt shaft and a lifting locking shaft, the lifting locking shaft is hinged with an opening mechanism of a cabin door, a bolt cam is coaxially connected on the bolt shaft, the bolt cam is arranged between an upper roller and a lower roller, the upper roller and the lower roller form a moving assembly through a connecting piece, and the moving assembly is connected to the door structure through two hinged positions; the inner ends of the two lifting locking shafts are respectively in threaded connection with the left lifting locking piece and the right lifting locking piece, the inner ends of the left lifting locking piece and the right lifting locking piece are provided with limiting grooves, the inner ring of the upper roller is in interference fit with the limiting shaft, and the two ends of the limiting shaft respectively enter the limiting grooves of the left lifting locking piece and the right lifting locking piece after the cabin door is lifted; wherein the left side lift lock and the right side lift lock are hinged to the latch shaft. The mechanism realizes latching and lifting of the cabin door in a cam driving mode, is efficient and convenient, and has strong designability and accurate mechanism time sequence control.

Description

Non-dangerous cabin door bolt lifting mechanism

Technical Field

The invention relates to a non-dangerous cabin door bolt lifting mechanism, and relates to the field of passenger plane cabin door mechanisms.

Background

The latch mechanism of the non-dangerous cabin door of the civil aircraft is a functional component which is clearly required by airworthiness regulations, can play a role in preventing the cabin door from being opened accidentally in a closed state of the cabin door, fully considers the motion track of the cabin door, ensures that the cabin door can be reliably locked at a closed position under normal working conditions, and accurately controls the motion time sequence of the cabin door in the normal opening process of the cabin door. The cam mechanism has the remarkable characteristics that the angle and the time sequence of the motion mechanism can be distributed according to needs, various motion lifting tracks can be accurately realized, the power back-driving control of the mechanism can be realized by utilizing the arc locking function of the cam, the latch mechanism is simpler, the number of parts is greatly reduced, and various functional requirements can be easily realized by controlling the motion tracks.

Disclosure of Invention

The invention aims to provide a non-dangerous cabin door latch lifting mechanism which realizes latching and lifting of a cabin door in a cam driving mode, is efficient, convenient and fast, and has strong designability and accurate mechanism time sequence control.

In order to solve the above problems, the specific technical scheme of the invention is as follows: a non-dangerous cabin door bolt lifting mechanism is provided with a bolt shaft and a lifting locking shaft on a cabin door structure, wherein the lifting locking shaft is hinged with an opening mechanism of a cabin door; the inner ends of the two lifting locking shafts are respectively in threaded connection with the left lifting locking piece and the right lifting locking piece, the inner ends of the left lifting locking piece and the right lifting locking piece are provided with limiting grooves, the inner ring of the upper roller is in interference fit with the limiting shaft, and the two ends of the limiting shaft respectively enter the limiting grooves of the left lifting locking piece and the right lifting locking piece after the cabin door is lifted; wherein the left side lift lock and the right side lift lock are hinged to the latch shaft.

When the bolt cam drives the upper roller to move, the lower roller and the bolt cam have a clearance without contacting.

A method of effecting upward movement of a door using a non-hazardous door latch lifting mechanism, comprising the steps of:

1) the bolt shaft is driven to drive the bolt cam to rotate clockwise, the upper idler wheel is forced to move upwards under the action of the bolt cam, and the connecting piece hinged on the cabin door structure drives the cabin door to lift upwards;

2) the latch shaft rotates relatively between the left lifting locking piece and the right lifting locking piece, and when the latch shaft is rotated, the lifting locking shaft, the left lifting locking piece and the right lifting locking piece are stationary;

3) the limiting shaft moves upwards along with the upper idler wheel, and after the movement is finished, two ends of the limiting shaft respectively enter clamping grooves of a left lifting locking piece and a right lifting locking piece which are arranged on the lifting locking shaft, so that the cabin door is ensured to provide enough freedom degree restraint for the opening mechanism;

4) when the bolt cam drives the upper idler wheel to move, the lower idler wheel and the cam have a gap and are not contacted, and when the cabin door is in a completely closed state, and if the cabin door has an upward movement door opening trend due to the conditions of airplane bumping and the like, the bolt cam stops the lower idler wheel from moving upwards through the lower surface, so that the cabin door structure is prevented from moving upwards, and the function of locking the cabin door is achieved;

5) the bolt shaft is driven to drive the bolt cam to rotate anticlockwise, and the upper idler wheel is attached to the upper surface of the bolt cam to drive the cabin door structure to move downwards until the cabin door structure returns to the full bolt-up position; if the upper roller fails to follow the latch cam to move the hatch door structure downwardly due to some accident, the lower surface of the cam will contact the lower roller and drive the hatch door downwardly until it returns to the fully latched position.

The invention has the following beneficial effects:

1. the cabin door lifting mechanism is driven by the cam, the rotating cam shaft drives the latch cam to rotate in the lifting process, the idler wheel arranged on the cabin door structure is matched with the cam, the cabin door is lifted under the driving of the cam, the mechanism locking is realized through the base circle surface of the cam, the mechanism principle is simple, and the performance is reliable;

2. the cam has accurate time sequence, the structural characteristics of the cam can realize motion control according to various time sequence requirements, and a cam curve can be processed at will on the premise of meeting the size requirement of a processing cutter, so that various motion time sequence changes are accurately met;

3. the space required by the bolt lifting mechanism is compact, the bolt lifting mechanism is convenient to arrange in a cabin door structure with limited size, the space occupied by the mechanism is saved, excessive installation and connection are not needed, the number of parts of the cabin door mechanism is reduced, and the mechanism arrangement space of the cabin door is obviously saved;

4. the cam mechanism has the advantages of high reliability, reliable motion stroke and good applicability, can be widely applied to various types of non-dangerous cabin doors, and can reliably lock the cabin doors at the closing or opening positions.

Drawings

Fig. 1 is a schematic view of the connection of the present invention to a fuselage structure.

Figure 2 is a schematic view of the latch lifting mechanism of the present invention.

FIG. 3 is a schematic view of the state of the latch cam at the start of lifting of the present invention.

FIG. 4 is a schematic view of the latch cam at the end of the lift of the present invention.

Detailed Description

As shown in fig. 1 to 4, a non-hazardous door latch lifting mechanism, a latch shaft 1 and two coaxially arranged lifting locking shafts 2 are provided on a door structure 4, the lifting locking shafts 2 are hinged with a door opening mechanism 3, a latch cam 8 is coaxially connected on the latch shaft 1, the latch cam 8 is arranged between an upper roller 6 and a lower roller 9, the upper roller 6 and the lower roller 9 form a moving assembly through a connecting piece 10, and the moving assembly is connected to the door structure 4 through two hinges; the inner ends of the two lifting locking shafts 2 are respectively in threaded connection with the left lifting locking piece 5 and the right lifting locking piece 7, the inner ends of the left lifting locking piece 5 and the right lifting locking piece 7 are provided with limiting grooves, the inner ring of the upper idler wheel 6 is in interference fit with the limiting shaft 11, and the two ends of the limiting shaft 11 respectively enter the limiting grooves of the left lifting locking piece 5 and the right lifting locking piece 7 after the cabin door is lifted; wherein the left lift lock 5 and the right lift lock 7 are hinged to the latch shaft 1.

When the bolt cam 8 drives the upper roller 6 to move, the lower roller 9 and the bolt cam 8 have a clearance without contact.

1) the bolt shaft 1 is driven to drive the bolt cam 8 to rotate clockwise, the upper idler wheel 6 is forced to move upwards under the action of the bolt cam 8, and the connecting piece 10 hinged on the cabin door structure 4 drives the cabin door to lift upwards;

2) the latch shaft 1 relatively rotates between the left lifting locking piece 5 and the right lifting locking piece 7, and when the latch shaft 1 is rotated, the lifting locking shaft 2 is still with the left lifting locking piece 5 and the right lifting locking piece 7;

3) the limiting shaft 11 moves upwards along with the upper idler wheel 6, and after the movement is finished, two ends of the limiting shaft 11 respectively enter clamping grooves of a left lifting locking piece 5 and a right lifting locking piece 7 which are arranged on the lifting locking shaft 2, so that the cabin door is ensured to provide enough freedom degree restraint for the opening mechanism 3;

4) when the bolt cam 8 drives the upper roller 6 to move, the lower roller 9 and the cam have a gap without contacting, when the cabin door is in a completely closed state, if the cabin door has an upward movement door opening trend due to the conditions of airplane bump and the like, the bolt cam 8 prevents the lower roller 9 from moving upwards through the lower surface, so that the cabin door structure 4 is prevented from moving upwards, and the effect of locking the cabin door is achieved;

5) by driving the latch shaft 1 to rotate the latch cam 8 counterclockwise, the upper roller 6 engages with the upper surface of the latch cam 8 to move the door structure 4 downward until it returns to the fully latched position. If the upper roller 6 is not able to follow the latch cam 8 to move the door structure 4 downwards due to some accident, the lower surface of the cam 8 will come into contact with the lower roller 9 and drive the door downwards. Until it returns to the fully latched position.

What has been described above is merely a preferred embodiment of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the principle of the present invention, and the protection scope of the present invention should be considered.

Claims

1. The utility model provides a non-dangerous hatch door bolt hoist mechanism is equipped with latch shaft (1) and lift locking axle (2) on hatch door structure (4), and lift locking axle (2) are articulated with opening mechanism (3) of hatch door, its characterized in that: coaxially connecting a bolt cam (8) on a bolt shaft (1), wherein the bolt cam (8) is arranged between an upper roller (6) and a lower roller (9), and the upper roller (6) and the lower roller (9) form a moving assembly through a connecting piece (10), and the moving assembly is connected to a cabin door structure (4) through two hinged joints; the inner ends of the two lifting locking shafts (2) are respectively in threaded connection with the left lifting locking piece (5) and the right lifting locking piece (7), the inner ends of the left lifting locking piece (5) and the right lifting locking piece (7) are provided with limiting grooves, the inner ring of the upper roller (6) is in interference fit with the limiting shaft (11), and the two ends of the limiting shaft (11) respectively enter the limiting grooves of the left lifting locking piece (5) and the right lifting locking piece (7) after the cabin door is lifted; wherein the left lifting locking piece (5) and the right lifting locking piece (7) are hinged with the latch shaft (1).

2. A non-hazardous door latch lifting mechanism according to claim 1, wherein: when the bolt cam (8) drives the upper roller (6) to move, the lower roller (9) and the bolt cam (8) have a clearance without contact.

3. A method of effecting upward movement of a door using the non-hazardous door latch lifting mechanism of claim 1, comprising the steps of:

1) the bolt shaft (1) is driven to drive the bolt cam (8) to rotate clockwise, the upper idler wheel (6) is forced to move upwards under the action of the bolt cam (8), and the cabin door is driven to lift upwards through the connecting piece (10) hinged on the cabin door structure (4);

2) the latch shaft (1) relatively rotates between the left lifting locking piece (5) and the right lifting locking piece (7), and when the latch shaft (1) is rotated, the lifting locking shaft (2) is still with the left lifting locking piece (5) and the right lifting locking piece (7);

3) the limiting shaft (11) moves upwards along with the upper idler wheel (6), after the movement is finished, two ends of the limiting shaft (11) respectively enter limiting grooves of a left lifting locking piece (5) and a right lifting locking piece (7) which are arranged on the lifting locking shaft (2), and the cabin door is guaranteed to provide enough freedom degree restraint for the opening mechanism (3);

4) when the bolt cam (8) drives the upper roller (6) to move, the lower roller (9) and the bolt cam (8) have a gap without contact, and when the cabin door is in a completely closed state, if the cabin door has an upward movement door opening trend due to the condition of airplane bumping, the bolt cam (8) prevents the lower roller (9) from moving upwards through the lower surface, so that the cabin door structure (4) is prevented from moving upwards, and the effect of locking the cabin door is achieved;

5) the bolt shaft (1) is driven to drive the bolt cam (8) to rotate anticlockwise, and the upper roller (6) is attached to the upper surface of the bolt cam (8) to drive the cabin door structure (4) to move downwards until the cabin door structure returns to the full-bolt-up position; if the upper roller (6) cannot drive the cabin door structure (4) to move downwards along with the bolt cam (8) due to some accident, the lower surface of the bolt cam (8) is contacted with the lower roller (9) to drive the cabin door to move downwards until the cabin door returns to the full-latching position.