Boarding ladder self-adaptive adjusting mechanism, using method thereof and boarding ladder

Abstract

The invention provides a self-adaptive adjusting mechanism of an airladder, a using method of the self-adaptive adjusting mechanism and the airladder, and belongs to the technical field of aviation technology comprehensive guarantee. The self-adaptive adjusting mechanism of the airladder comprises trundles, wheel forks, a movable cylinder, a rotating shaft and a spring cylinder; the rotating shaft is assembled in the movable cylinder through a bearing, the spring cylinder is fixedly connected with the upper end of the movable cylinder, and the inner diameter of the spring cylinder is larger than the outer diameter of the rotating shaft. The wheel forks are fixedly connected with the ends, away from the spring barrels, of the rotating shafts, the trundles are installed on the wheel forks, the spring barrels are fixed to the lower portion of the boarding ladder body structure, and the movable barrels are provided with clamping holes allowing the clamping pieces to penetrate through. The invention has better manufacturability and bearing capacity; the structure is simple, height adjustment can be automatically completed by means of gravity, and the height of the airstairs can be automatically adjusted to adapt to angle changes.

Description

Technical Field

[0001] This invention belongs to the field of aviation technology integrated support technology, and particularly relates to an adaptive adjustment mechanism for boarding stairs and its usage method, as well as the boarding stairs themselves. Background Art

[0002] The aircraft boarding door is located in the front section of the aircraft. Because it is far from the center of gravity of the aircraft, the height of the boarding door rings will change due to changes in the aircraft's fuel level and load. In order to adapt to changes in the aircraft's status, the original boarding ladder had to be manually adjusted in height before each use to accommodate the angle changes, which made it inconvenient to operate.

[0003] Therefore, there is a need for an adaptive adjustment mechanism for boarding stairs that can automatically adjust the height of the boarding stairs to adapt to changes in angle. Summary of the Invention

[0004] To address the technical problem of existing boarding ladders requiring manual height adjustment to accommodate angle changes, resulting in poor operational convenience, this invention provides a convenient and automatically adjustable boarding ladder mechanism. The technical solution is as follows:

[0005] In one aspect, an adaptive adjustment mechanism for an boarding ladder is provided, including casters, wheel forks, movable cylinders, slewing shafts, and spring cylinders;

[0006] The rotating shaft is assembled inside the movable cylinder via bearings. The spring cylinder is fixedly connected to the upper end of the movable cylinder, and the inner diameter of the spring cylinder is larger than the outer diameter of the rotating shaft. The wheel fork is fixedly connected to the end of the rotating shaft away from the spring cylinder. The caster is installed on the wheel fork. The spring cylinder is fixed below the main structure of the boarding ladder. The movable cylinder is provided with a snap-fit ​​hole that allows snap-fit ​​parts to pass through.

[0007] Optionally, the locking element is a fixing pin, and the movable cylinder has a threaded hole that matches the fixing pin. The fixing pin is screwed onto the movable cylinder and locked onto the rotating shaft through the threaded hole.

[0008] Optionally, the retaining pin is hexagonal in shape.

[0009] The adaptive adjustment mechanism of the boarding ladder also includes an Allen wrench for turning the fixing pin when the fixing pin is inserted into the threaded hole of the movable cylinder.

[0010] Optionally, the spring cylinder is welded to the upper end of the movable cylinder.

[0011] Alternatively, the wheel fork is welded to the end of the slewing shaft away from the spring cylinder.

[0012] In a second aspect, a boarding ladder is provided, including the boarding ladder adaptive adjustment mechanism described in any of the first aspects, and the boarding ladder main body structure located above the spring cylinder.

[0013] Thirdly, a method of using the adaptive adjustment mechanism for a boarding ladder as described in any of the first aspects is provided, the method comprising:

[0014] After the flight, before boarding, passengers hang the boarding ladder. Under the influence of gravity, the main structure of the boarding ladder compresses the spring device in the spring cylinder. The rotating shaft is compressed into the spring cylinder due to elasticity. Under the influence of gravity, the rotating shaft rotates around the movable cylinder through the bearing to adapt to the terrain. The locking piece is inserted into the threaded hole of the movable cylinder to limit the rotating shaft. At this time, the rotating shaft cannot retract or rotate, achieving a locked state and realizing automatic altitude adjustment. At this time, passengers can freely board and disembark the aircraft via the boarding ladder.

[0015] Optionally, the locking element is a hexagonal fixing pin. When the rotating shaft is limited, the fixing pin is inserted into the threaded hole of the movable cylinder and the fixing pin is turned by an Allen wrench.

[0016] The beneficial effects of this invention are at least as follows:

[0017] This invention provides an adaptive adjustment mechanism for a boarding ladder, including casters, wheel forks, a movable cylinder, a slewing shaft, and a spring cylinder. The slewing shaft is mounted inside the movable cylinder via bearings. The spring cylinder is fixedly connected to the upper end of the movable cylinder, and the inner diameter of the spring cylinder is larger than the outer diameter of the slewing shaft. The wheel fork is fixedly connected to the end of the slewing shaft away from the spring cylinder. The casters are mounted on the wheel forks, and the spring cylinder is fixed below the main structure of the boarding ladder. The movable cylinder has a snap-fit ​​hole that allows a snap-fit ​​component to pass through. This invention has good manufacturability and load-bearing capacity; its structure is simple, and it can automatically adjust its height using gravity to adapt to changes in angle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the adaptive adjustment mechanism;

[0019] Among them: 1-caster, 2-wheel fork, 3-bearing, 4-moving cylinder, 5-swivel shaft, 6-fixed pin, 7-spring cylinder. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0022] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0024] See Figure 1 An embodiment of the present invention provides an adaptive adjustment mechanism for a boarding ladder, including casters 1, wheel forks 2, movable cylinders 4, rotating shafts 5, and spring cylinders 7;

[0025] The rotary shaft 5 is assembled inside the movable cylinder 4 via bearing 3.

[0026] The upper end of the spring cylinder 7 is fixedly connected to the movable cylinder 4, and the inner diameter of the spring cylinder 7 is larger than the outer diameter of the rotating shaft 5.

[0027] The wheel fork 2 is fixedly connected to the end of the slewing shaft 5 away from the spring cylinder 7.

[0028] Caster 1 is mounted on wheel fork 2.

[0029] Spring cylinder 7 is fixed to the bottom of the main structure of the boarding ladder.

[0030] The movable cylinder 4 is provided with a snap-fit ​​hole that allows the snap-fit ​​component to pass through.

[0031] An embodiment of the present invention provides a method for Figure 1 The method of using the adaptive adjustment mechanism of the boarding ladder shown includes:

[0032] After the flight, before boarding, the passengers hang the boarding ladder. Under the influence of gravity, the main structure of the boarding ladder compresses the spring device in the spring cylinder 7. The rotating shaft 5 is compressed into the spring cylinder 7 due to the elasticity. Under the influence of gravity, the rotating shaft 5 rotates around the movable cylinder 4 through the bearing 3 to adapt to the terrain. The snap-fit ​​is inserted into the threaded hole of the movable cylinder 4 to limit the rotating shaft 5. At this time, the rotating shaft 5 cannot retract or rotate, and it reaches the locked state, realizing automatic altitude adjustment. At this time, the passengers can freely board and disembark the aircraft via the boarding ladder.

[0033] In one embodiment, the locking element is a hexagonal fixing pin 6. When the rotating shaft 5 is limited, the fixing pin 6 is inserted into the threaded hole of the movable cylinder 4, and the fixing pin 6 can be turned by an Allen wrench.

[0034] An embodiment of the present invention provides an adaptive adjustment mechanism for a boarding ladder, including casters 1, wheel forks 2, bearings 3, movable cylinders 4, rotating shafts 5, fixed pins 6, and spring cylinders 7;

[0035] Among them, the caster 1 is mounted on the wheel fork 2 and welded to the slewing shaft 5. The slewing shaft 5 is assembled inside the movable cylinder 4, and the spring cylinder 7 is welded and fixed to the movable cylinder 4.

[0036] The movable cylinder 4 has a threaded hole for matching the fixing pin 6. The fixing pin 6 is screwed onto the movable cylinder 4 and is secured to the rotating shaft 5 through the threaded hole.

[0037] In one embodiment, the fixing pin 6 has a hexagonal structure, and the mechanism further includes an internal hex wrench for turning the fixing pin 6 when it is inserted into the threaded hole of the movable cylinder 4.

[0038] The remaining connection relationships in this embodiment are the same as those in the above embodiments and will not be repeated here.

[0039] The adjustment mechanism is mechanical.

[0040] like Figure 1 As shown, after the flight, before boarding, the personnel hang the boarding ladder. Under the influence of gravity, the spring device in the spring cylinder 7 is squeezed by the main structure of the boarding ladder. The rotating shaft 5 is compressed into the spring cylinder 7 due to the elastic effect. Under the influence of gravity, the rotating shaft 5 can rotate around the movable cylinder 4 through the bearing 3 to adapt to the terrain. The fixing pin 6 is inserted into the threaded hole of the movable cylinder 4, and the fixing pin 6 is manually turned to limit the rotating shaft 5. At this time, the rotating shaft 5 cannot retract or rotate, and reaches the locked state, realizing automatic altitude adjustment. At this time, the personnel can freely board and disembark the aircraft through the boarding ladder.

[0041] An embodiment of the present invention also provides a boarding ladder, including a boarding ladder adaptive adjustment mechanism provided in the embodiment of the present invention, and a boarding ladder main structure located above the spring cylinder 7.

[0042] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Furthermore, any parts of the present invention not described in detail are conventional techniques.

Claims

1. An adaptive adjustment mechanism for a boarding ladder, characterized in that: Including casters, wheel forks, movable cylinders, slewing shafts, and spring cylinders; Among them, the rotating shaft is assembled inside the movable cylinder through a bearing, the spring cylinder is fixedly connected to the upper end of the movable cylinder, and the inner diameter of the spring cylinder is larger than the outer diameter of the rotating shaft; the wheel fork is fixedly connected to the end of the rotating shaft away from the spring cylinder, the caster is installed on the wheel fork, the spring cylinder is fixed under the main structure of the boarding ladder, and the movable cylinder is provided with a clamping hole allowing the clamping piece to pass through.

2. The self-adaptive adjustment mechanism of the boarding ladder according to claim 1, characterized in that: The clamping piece is a fixing pin, a threaded hole matching the fixing pin is provided on the movable cylinder, the fixing pin is screwed on the movable cylinder and clamped on the rotary shaft through the threaded hole.

3. The self-adaptive adjustment mechanism of the boarding ladder according to claim 2, characterized in that: The fixing pin is a hexagonal structure. The self-adaptive adjustment mechanism of the boarding ladder also includes: an inner hexagonal wrench, which is used to screw the fixing pin when the fixing pin is inserted into the threaded hole of the movable cylinder.

4. The self-adaptive adjustment mechanism of the boarding ladder according to claim 1, characterized in that: The spring cylinder is fixed to the upper end of the movable cylinder by welding.

5. The self-adaptive adjustment mechanism of the boarding ladder according to claim 1, characterized in that: The wheel fork is welded to one end of the rotary shaft away from the spring tube.

6. A boarding ladder, characterized in that: It comprises the self-adaptive adjustment mechanism of the boarding ladder as described in any one of claims 1 to 5, and a main structure of the boarding ladder located above the spring tube.

7. A method for using the self-adaptive adjustment mechanism of a boarding ladder according to any one of claims 1 to 5, characterized in that: The method comprises: After the flight, the personnel hang up the boarding ladder before boarding. Under the influence of gravity, the spring device in the spring cylinder is squeezed by the main structure of the boarding ladder, and the rotating shaft is compressed into the spring cylinder due to the elasticity. Under the influence of gravity, the rotating shaft rotates around the movable cylinder through the bearing to adapt to the terrain. The clamping part is inserted into the threaded hole of the movable cylinder to limit the rotating shaft. At this time, the rotating shaft cannot shrink or rotate, and reaches a locked state, realizing automatic height adjustment. At this time, personnel can freely get on and off the plane through the boarding ladder.

8. The method according to claim 7, characterized in that The clamping piece is a fixing pin with a hexagonal structure. When limiting the rotating shaft, the fixing pin is inserted into the threaded hole of the movable cylinder and the fixing pin is screwed with an inner hexagon wrench.

Images