CN219056592U

CN219056592U - Foldable quick-release boarding ladder

Info

Publication number: CN219056592U
Application number: CN202223548566.7U
Authority: CN
Inventors: 柳洪芬; 冯冬翔; 蒋立宅
Original assignee: AVIC First Aircraft Institute
Current assignee: AVIC First Aircraft Institute
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-23
Anticipated expiration: 2032-12-29

Abstract

The utility model belongs to the technical field of airplane security equipment, and discloses a foldable quick-release boarding ladder, which comprises the following components: armrests, upper boarding stairs and lower boarding stairs; the upper boarding ladder is hinged with the lower boarding ladder; the armrests are connected with the upper boarding ladder; hinge arms are arranged at two ends of the top of the upper boarding ladder and are matched with fixed supports on the floor of the airplane to fix the boarding ladder. The boarding ladder further includes: springs, steel cables, pulleys; one end of the spring is fixed on the side wall of the upper boarding ladder, and the other end of the spring is connected with one end of the steel cable; the pulley is arranged at the bottom of the side wall of the upper boarding ladder; the steel cable winds around the pulley and is connected with the top of the lower boarding ladder, and the other end of the steel cable is connected with the top of the lower boarding ladder.

Description

Foldable quick-release boarding ladder

Technical Field

The utility model belongs to the technical field of aircraft security equipment, and relates to a foldable quick-release boarding ladder.

Background

The boarding ladder is mainly used for a crew to get on or off an airplane and is one of essential important guarantee equipment for the airplane. The large-scale aircraft and the land-based aircraft mostly adopt the form of independent boarding steps, and at present, the independent boarding steps mainly have two forms:

1. leaning ladder: the rubber leaning head and the anti-slip skirting are used for fixing the machine body;

2. hanging ladder form: is fixed with a special notch of the airplane body through a fixing machine part.

Both of the two forms of the boarding ladder have the problems of easy detachment from the fuselage, difficult detachment and installation from the fuselage and poor use convenience and maneuverability.

Disclosure of Invention

The utility model provides a foldable quick-release boarding ladder which can be quickly disassembled and assembled, has high safety, has the functions of on-board retractable operation, is convenient to operate, can be folded and stored, and reduces storage space.

A collapsible quick release gate comprising: a handrail 1, an upper boarding ladder 2 and a lower boarding ladder 3;

the upper boarding ladder 2 is hinged with the lower boarding ladder 3; the handrail 1 is connected with an upper boarding ladder 2;

hinge arms are arranged at two ends of the top of the upper boarding ladder and are matched with fixed supports on the floor of the airplane to fix the boarding ladder.

Further, the boarding ladder further comprises: a spring 5 and a steel cable 6;

one end of the spring 5 is fixed on the side wall of the upper boarding ladder 2, and the other end of the spring 5 is connected with one end of the steel cable 6;

the other end of the steel cable is connected with the top of the lower boarding ladder 3.

Further, the boarding ladder further comprises: two rollers 4;

the two rollers 4 are arranged at two ends of the bottom of the lower boarding ladder 3 and are used for ground sliding.

Further, the boarding ladder further comprises: a handrail quick release pin 9;

the handrail 1 is connected with the upper boarding ladder 2 through a handrail quick release pin 9.

Further, the boarding ladder further comprises: quick release pins 8 of the boarding ladder;

the hinge arm at the top of the upper boarding ladder is connected with a support on the floor of the airplane through a boarding ladder quick-release pin 8.

Further, the boarding ladder further comprises: a pulley 7;

the pulley 7 is arranged at the bottom of the side wall of the upper boarding ladder;

the steel cable 6 is connected with the top of the lower boarding ladder 3 by winding the pulley 7.

Compared with the common boarding ladder, the boarding ladder has higher safety, skillfully utilizes the spring steel cable assembly to connect the boarding ladder and the disembarking ladder, realizes the functions of retraction, opening and folding of boarding on the boarding ladder, and improves the convenience of use.

Drawings

FIG. 1 is a schematic view of a collapsible quick release gate;

fig. 2 is a schematic view of the boarding ladder in an erect state;

fig. 3 is a schematic view of the lower gate in a closed state;

FIG. 4 is a schematic view of a lower gate passing dead point;

FIG. 5 is a fully open schematic view of the lower gate;

in the figure, a handrail is 1, an upper boarding ladder is 2, a lower boarding ladder is 3, rollers are 4, springs are 5, steel ropes are 6, pulleys are 7, quick-release pins of the boarding ladder are 8, and quick-release pins of the handrail are 9.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent, and the technical solutions in the embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments are some, but not all, embodiments of the utility model. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

A foldable quick-release boarding ladder can realize the quick-retraction and lowering functions of the boarding ladder by operating an armrest on the boarding ladder or operating a tail end roller of a lower ladder on the ground, and the boarding ladder is folded to stand in a cabin after retraction or can realize the quick-release function by a quick-release pin.

As shown in fig. 1, the elevator consists of an armrest 1, an upper boarding ladder 2, a lower boarding ladder 3, rollers 4, springs 5, steel ropes 6, pulleys 7, boarding ladder quick-release pins 8 and armrest quick-release pins 9. The boarding ladder is connected with a support on the floor in the cabin through a boarding ladder quick-release pin, so that a quick-release function is realized. The boarding ladder handrail can be folded and unfolded through the handrail quick-release pin. The upper and lower boarding stairs are hinged through a fixed rotating shaft, one end of a spring is fixed on the side wall of the upper boarding stairs, and the other end of the spring is connected with one end of a steel cable; the pulley is arranged at the bottom of the side wall of the upper boarding ladder; the steel cable bypasses the pulley and is connected with the top of the lower boarding ladder, the other end of the steel cable is connected with the top of the lower boarding ladder, and the control of the magnitude and the change of the direction of the spring moment acting on the lower boarding ladder are realized through the springs, the steel cable and the pulley components which are connected with the upper boarding ladder and the lower boarding ladder.

As shown in fig. 2 to 5, when the operating handrail puts down the boarding ladder, the included angle between the lower boarding ladder and the upper boarding ladder is gradually increased under the action of gravity, the spring moment is reduced along with the gradual increase of the included angle, when a certain clamping degree is reached, the spring moment changes direction, partial gravity moment is overcome, the lower boarding ladder is gradually opened along with the continuous increase of the included angle, and forms a closing angle of not more than 75 degrees with the ground when the boarding ladder touches the ground, and then the end roller of the boarding ladder is pushed to roll outwards under the action of gravity until the boarding ladder is completely opened, and the boarding ladder is retracted into the reverse process.

Claims

1. A collapsible quick release airstair, characterized in that: the boarding ladder includes: a handrail (1), an upper boarding ladder (2) and a lower boarding ladder (3);

the upper boarding ladder (2) is hinged with the lower boarding ladder (3); the handrail (1) is connected with the upper boarding ladder (2);

2. A collapsible quick release gate according to claim 1, wherein: the boarding ladder further includes: a spring (5) and a steel cable (6);

one end of the spring (5) is fixed on the side wall of the upper boarding ladder (2), and the other end of the spring (5) is connected with one end of the steel cable (6);

the other end of the steel cable is connected with the top of the lower boarding ladder (3).

3. A collapsible quick release gate according to claim 2, wherein: the boarding ladder further includes: two rollers (4);

the two rollers (4) are arranged at two ends of the bottom of the lower boarding ladder (3) and used for ground sliding.

4. A collapsible quick release gate according to claim 3, wherein: the boarding ladder further includes: a handrail quick release pin (9);

the handrail (1) is connected with the upper boarding ladder (2) through a handrail quick-release pin (9).

5. The collapsible quick release gate as defined in claim 4 wherein: the boarding ladder further includes: a quick release pin (8) of the boarding ladder;

the hinge arm at the top of the upper boarding ladder is connected with a support on the floor of the airplane through a boarding ladder quick-release pin (8).

6. The collapsible quick release gate as defined in claim 5 wherein: the boarding ladder further includes: a pulley (7);

the pulley (7) is arranged at the bottom of the side wall of the upper boarding ladder;

the steel cable (6) is connected with the top of the lower boarding ladder (3) by winding around the pulley (7).