A boarding ladder

Abstract

The present application relates to the field of aviation machinery, in particular to a kind of for boarding ladder;The present application provides a kind of boarding ladder, set on helicopter, it includes: boarding ladder installation frame, set on the surface of helicopter;And boarding ladder installation cover is rotatably connected with the boarding ladder installation frame, and boarding ladder installation cover is equipped with boarding step, when the boarding ladder installation cover is opened, it is used for stepping and boarding;One end of the boarding ladder installation cover is equipped with locking point, the boarding ladder installation frame is equipped with lock hook, when the boarding ladder installation cover is closed, it is used for buckling the locking point;Realize that boarding step is set in the interior of machine body when not being used, when the flight of helicopter, air resistance is avoided, further, make boarding step not easy to damage in the process of flight, further improve the service life.

Description

Technical Field

[0001] This invention relates to the field of aviation machinery, and more specifically to a boarding ladder. Background Technology

[0002] Boarding ladders are widely used on helicopters, facilitating easy boarding and disembarking. They come in various forms, primarily divided into aircraft-integrated ladders and ground-based ladders. Currently, ground-based ladders are bulky and require additional ground crew for operation, making them quite inconvenient.

[0003] A small and easy-to-operate stepless retractable boarding step has emerged. For example, the utility model with publication number CN208731206U, entitled "A Stepless Retractable Boarding Step and a Stepless Retractable Boarding System," discloses that the stepless retractable boarding step includes a mounting bracket, a rocker wheel mechanism, a transmission mechanism, a step, and a connecting arm. The rocker wheel mechanism is located at the top of the mounting bracket, and the transmission mechanism is located at the bottom of the mounting bracket and is connected to the rocker wheel mechanism. One end of the connecting arm is located on one side of the step and is set at an angle to the step. A slide rail mechanism is provided at the bottom of the mounting bracket, and the end of the connecting arm away from the step is slidably connected to the slide rail mechanism. The connecting arm is also connected to the transmission mechanism. The rocker wheel mechanism can drive the connecting arm to slide relative to the slide rail mechanism through the transmission mechanism.

[0004] However, in the aforementioned technologies, the boarding ramp is located on the outside of the fuselage, which will cause air resistance to the helicopter's flight. Furthermore, the boarding ramp is exposed to the outside, making it prone to damage during flight and reducing its service life. Summary of the Invention

[0005] This invention was made to solve the above-mentioned problems, and its purpose is to provide a boarding ladder that can improve the safety performance of the boarding ladder.

[0006] This invention provides a boarding ladder, installed on a helicopter, comprising: a boarding ladder mounting frame, disposed on the surface of the helicopter; and a boarding ladder mounting cover, rotatably connected to the boarding ladder mounting frame, wherein the boarding ladder mounting cover is provided with a boarding step for stepping on and boarding when the boarding ladder mounting cover is opened; one end of the boarding ladder mounting cover is provided with a locking point, and the boarding ladder mounting frame is provided with a locking hook, wherein the locking hook is used to engage the locking point when the boarding ladder mounting cover is closed.

[0007] The boarding ladder provided by the present invention may also have the following features: the locking hook includes: a locking hook portion for engaging and disengaging with a locking point; a first rotatable connecting portion disposed at one end of the locking hook portion for rotatably connecting with the boarding ladder mounting frame; a button portion disposed at the other end of the locking hook portion, which, when pressed, disengages the locking hook portion from the locking point; and a torsion spring installed on the first rotatable connecting portion, which, when the button portion is released, automatically resets the locking hook portion.

[0008] The boarding ladder provided by the present invention may also have the following features: the boarding ladder mounting frame is provided with a locking mounting groove, the locking hook also includes a locking hook mounting component, which is fastened to the locking mounting groove, the locking mounting component includes: a limiting part, which is used to abut against the button part after the release button part is released; and a rotating connecting part two, a pin passing through the rotating connecting part one and connecting to the rotating connecting part two.

[0009] The boarding ladder provided by the present invention may also have the following feature: the button part and the locking hook part are integrally connected, and the button part and the locking hook part form an obtuse angle.

[0010] The boarding ladder provided by the present invention may also have the following features: wherein the boarding ladder includes a first boarding ladder, the first boarding ladder includes a first boarding ladder mounting frame and a first boarding ladder mounting cover, and a first step part is installed on the inner side of the first boarding ladder mounting cover, forming a step surface with the inner surface of the first boarding ladder mounting cover.

[0011] The boarding ladder provided by the present invention may also have the following features: the first boarding ladder mounting cover includes a protruding limiting part and a limiting rod receiving groove, and a limiting rod is installed on the first boarding ladder mounting frame. When the first boarding ladder mounting cover is opened, the limiting rod abuts against the protruding limiting part, so that the first boarding ladder mounting cover is at a predetermined angle; when the first boarding ladder mounting cover is closed, the limiting rod is placed in the limiting rod receiving groove.

[0012] The boarding ladder provided by the present invention may also have the following features: wherein the boarding ladder further includes: a second boarding ladder, which is located on one side of the first boarding ladder, the second boarding ladder including a second boarding ladder mounting frame, which is elongated; a second boarding ladder mounting cover, which is elongated; and a second boarding step, which is disposed at the end of the second boarding ladder mounting cover, forming two steps with the first boarding ladder mounting cover.

[0013] The boarding ladder provided by the present invention may also have the following features: the second boarding step is rotatably connected to the second boarding ladder mounting cover; when the second boarding ladder mounting cover is opened, the second boarding step and the second boarding ladder mounting cover are set perpendicularly; when the second boarding ladder mounting cover is closed, the second boarding ladder mounting cover encloses the second boarding step within the second boarding ladder mounting frame.

[0014] The boarding ladder provided by the present invention may also have the following features: the second boarding ladder mounting cover is provided with a second limiting structure, which is used to abut against the second boarding step when the second boarding ladder mounting cover is opened; the second boarding ladder also includes a rope, one end of which is connected to the second boarding ladder mounting cover, for pulling the rope upward to close the second boarding ladder mounting cover.

[0015] The boarding ladder provided by the present invention may also have the following feature: wherein the second boarding ladder further includes a third boarding step, which is installed on the second boarding ladder mounting cover, forming a three-step system with the second boarding step and the first boarding ladder mounting cover.

[0016] The role and effect of invention

[0017] According to the present invention, a boarding ladder is provided on the surface of a helicopter with a boarding ladder mounting frame and a boarding ladder mounting cover, and the boarding ladder mounting cover is provided with boarding steps and locking points. The boarding ladder mounting frame is provided with locking hooks. This allows the boarding steps to be installed inside the fuselage when not in use. During helicopter flight, this avoids causing air resistance. Furthermore, it makes the boarding steps less prone to damage during flight, thus further improving their service life.

[0018] Furthermore, the button and torsion spring design allows the ladder mounting cover to be opened simply by pressing the button, making it very convenient. The torsion spring also ensures that the locking hook automatically resets.

[0019] Furthermore, the limiting part on the locking hook mounting component can limit the button part, cooperating with the force of the torsion spring to ensure the repeated use of the button part. Furthermore, the button part and the locking hook part form an obtuse angle, making pressing easier. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the boarding ladder in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the boarding ladder in an embodiment of the present invention;

[0022] Figure 3 yes Figure 2 A sectional view;

[0023] Figure 4 This is a schematic diagram of the structure of the locking hook and locking hook mounting components in an embodiment of the present invention;

[0024] Figure 5 This is a partial enlarged view of the boarding ladder at the locking hook position in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the boarding ladder in the open state in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the first boarding ladder in an embodiment of the present invention;

[0027] Figure 8 yes Figure 7 A magnified view of a portion of the image; and

[0028] Figure 9 This is a schematic diagram of the structure of the first boarding ladder in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 1-Ladder mounting frame; 2-Ladder mounting cover; 11-Locking hook; 21-Locking point; 12-Torsion spring; 13-Locking hook mounting component; 111-Locking hook part; 112-Rotating connection part one; 113-Button part; 101-Locking mounting groove; 131-Limiting part; 132-Rotating connection part two; a-First boarding ladder; 1a-First boarding ladder mounting frame; 2a-First boarding ladder mounting cover; 3a-First step part; 4a-Fixing component; 5a-Second torsion spring; 41a-Limiting rod; 42a Rotating rod; 43a-Fixing base; 21a-Protruding limiting part; 22a-Limiting rod receiving groove; b-Second boarding ladder; 1b-Second boarding ladder mounting frame; 2b-Second boarding ladder mounting cover; 3b-Second boarding step; 4b-Rope; 5b-Third boarding step. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the boarding ladder of the present invention.

[0031] Reference Figure 1 The present invention provides a boarding ladder, as shown in the reference. Figure 1 and Figure 2 It is installed on the helicopter, for example below the cockpit door, for pilot boarding. It includes: a boarding ladder mounting frame 1, a boarding ladder mounting cover 2, and a boarding step 3. The boarding ladder mounting frame 1 is mounted on the surface of the helicopter (the dotted line indicates the helicopter surface); the boarding ladder mounting cover 2 is rotatably connected to the boarding ladder mounting frame 1; the boarding step 3 is located on the boarding ladder mounting cover 2. When the boarding ladder mounting cover 2 is opened, the pilot steps on the boarding step 3 and uses it for support to board the helicopter; one end of the boarding ladder mounting cover 2 has a locking point 21, and the boarding ladder mounting frame has a locking hook 11, as shown in the reference. Figure 3 When the boarding ladder mounting cover 2 is closed, the locking hook 11 engages with the locking point 21, locking the boarding step 3 within the boarding ladder mounting cover 2 and the boarding ladder mounting frame 1.

[0032] Reference Figure 4 The locking hook 11 includes a locking hook portion 111, a rotating connecting portion 112, and a button portion 113. The locking hook portion 111 is used to engage and disengage with the locking point 21. The rotating connecting portion 112 is located at one end of the locking hook portion 111 and is used to rotatably connect with the ladder mounting frame 1. The button portion 113 is located at the other end of the locking hook portion 111. Pressing the button portion 113 can cause the locking hook portion 111 to swing and disengage from the locking point 21, thereby opening the ladder mounting cover 2. A torsion spring 12 is installed on the rotating connecting portion 112. When the button portion 113 is released, the torsion spring 12 can cause the locking hook portion 111 to automatically reset.

[0033] Specifically, the locking hook 11 also includes a locking hook mounting component 13. The ladder mounting frame 1 is provided with a locking mounting groove 101. The locking hook mounting component 13 is installed in the locking mounting groove 101 and is fastened to the locking mounting groove 101. The locking hook mounting component 13 includes a limiting part 131 and a rotating connecting part 2 132. A pin passes through the rotating connecting part 112 and the rotating connecting part 2 132, so that the rotating connecting part 112 and the rotating connecting part 2 132 are rotatably connected. A torsion spring 12 is sleeved on the pin, one end of which abuts against the locking hook 11, and the other end of which abuts against the locking hook mounting component 13 or the ladder mounting frame 1. The button part 113 has a recessed limiting platform near the limiting part 131. After the button part is released, the torsion spring 12 causes the locking hook 11 to rotate and causes the limiting platform to abut against the limiting part 131, thereby causing the button part 113 to abut against and be restricted within the limiting part 131.

[0034] Furthermore, the button part 113 and the locking hook part 111 are integrally formed, and the button part 113 and the locking hook part 111 form an obtuse angle. When the button part 113 is pressed, the pressing direction does not intersect with the rotation axis of the locking hook 11, thereby making it more convenient to press.

[0035] Reference Figures 6 to 8 Specifically, the boarding ladder includes a first boarding ladder a, which includes a first boarding ladder mounting frame 1a, a first boarding ladder mounting cover 2a, and a first step part 3a. The first step part 3a is installed on the inner side of the first boarding ladder mounting cover 2a, and the first step part 3a and the inner surface of the first boarding ladder mounting cover 2a form a stepping surface. The first step part 3a is provided with an anti-slip surface, such as a corrugated pattern or multiple protrusions.

[0036] The first ladder mounting cover 2a includes a protruding limiting part 21a and a limiting rod receiving groove 22a. A limiting rod 41a is installed on the first ladder mounting frame 1a. When the first ladder mounting cover 2a is opened, the limiting rod 41a abuts against the protruding limiting part 21a, so that the first ladder mounting cover 2a is at a predetermined angle. When the first ladder mounting cover 2a is closed, the limiting rod 41a is placed in the limiting rod receiving groove 22a. Specifically, it also includes a fixing component 4a, which includes a limiting rod 41a, a rotating rod 42a, and a fixing base 43a. The rotating rod 42a on the fixing component 4a passes through the first ladder mounting frame 1a and the first ladder mounting cover 2a, so that the first ladder mounting cover 2a is rotatably connected to the rotating rod 42a. A second torsion spring 5a is sleeved on the rotating rod 42a, which abuts against the first ladder mounting frame 1a and the first ladder mounting cover 2a respectively. After the button part 113 is pressed, the second torsion spring 5a causes the first ladder mounting cover 2a to open automatically. Specifically, there are two fixing components 4a, which are respectively installed at both ends of the first ladder mounting cover 2a.

[0037] Reference Figure 6The boarding stairs also include a second boarding stairs b, which is located on one side of the first boarding stairs a. The second boarding stairs b includes a second boarding stairs mounting frame 1b, a second boarding stairs mounting cover 2b, and a second boarding stairs 3b. The second boarding stairs mounting frame 1b is elongated; the second boarding stairs mounting cover 2b is elongated; and the second boarding stairs 3b is located at the end of the second boarding stairs mounting cover 2b, forming two steps with the first boarding stairs mounting cover 2a.

[0038] The second boarding step 3b is rotatably connected to the second boarding ladder mounting cover 2b. When the second boarding ladder mounting cover 2b is opened, the second boarding step 3b and the second boarding ladder mounting cover 2b are set perpendicularly. When the second boarding ladder mounting cover 2b is closed, the second boarding ladder mounting cover 2b encloses the second boarding step 3b within the second boarding ladder mounting frame 1b.

[0039] The second boarding ladder mounting cover 2b is provided with a second limiting structure. When the second boarding ladder mounting cover 2b is opened, the second limiting structure is used to abut against the second boarding footplate 3b. The second boarding ladder also includes a rope 4b, one end of which is connected to the second boarding ladder mounting cover 2b, and the other end passes through a pulley and a limiting hole. Pulling the rope 4b upward causes the second boarding ladder mounting cover 2b to rotate upward and close.

[0040] The second boarding ladder b also includes a third boarding step 5b, which is installed on the second boarding ladder mounting cover 2b, forming a three-step system with the second boarding step 3b and the first boarding ladder mounting cover 2a.

[0041] Working principle:

[0042] When not in use, the boarding ladder in this invention is referred to Figure 3 The ladder mounting cover 2 is in the locked state, and the boarding footboard 3 is locked inside the ladder mounting frame 1. The locking point 21 on the ladder mounting cover 2 is engaged with the locking hook 11 on the ladder mounting frame 1.

[0043] When boarding is required, press the button 113 on the locking hook 11 to rotate the locking hook 111 and disengage it from the locking point 21. The boarding ladder mounting cover 2 pops out under the action of the second torsion spring 5a or opens automatically under the action of gravity. Taking the boarding ladder as an example, which includes a first boarding ladder a and a second boarding ladder b, pressing the button 113 on the locking hook 11 opens the first boarding ladder mounting cover 2a on the first boarding ladder a and the second boarding ladder mounting cover 2b on the second boarding ladder b. During the opening process, the protruding limiting part 21a on the first boarding ladder mounting cover 2a abuts against the limiting rod 41a, so that the first boarding ladder mounting cover 2a is in contact with the limiting rod 41a. The near-horizontal position facilitates the stepping of the first footrest 3a on the first boarding ladder cover 2a for boarding. During the opening process, the second boarding footrest 3b and the third boarding footrest 5b on the second boarding ladder cover 2b are opened under the action of gravity and are perpendicular to the second boarding ladder cover 2b. The elongated shape of the second boarding ladder cover 2b makes the second boarding footrest 3b lower than the first boarding ladder cover 2a, thus forming a two-stage footrest with the first boarding ladder cover 1a, which facilitates the pilot's left and right feet to step on the footrest to board the aircraft. Furthermore, the third boarding footrest 5b forms a third-stage footrest for boarding.

[0044] After boarding is complete, pull the first boarding ladder cover 2a upwards, bringing the locking point 21 on the cover closer to the locking hook 11 on the frame 1a. This engages the locking point 21 with the hook 11, closing the first boarding ladder a. Pull the rope 4b upwards, causing the second boarding ladder cover 2b to rotate upwards. During this process, the second boarding step 3b and the third boarding step 5b re-engage with the second boarding ladder cover 2b under gravity. Finally, the locking point 21 on the cover 2b engages with the locking hook 11 on the frame 1b, closing the second boarding ladder b.

[0045] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A boarding ladder, installed on a helicopter, characterized in that, include: A ladder mounting frame is installed on the surface of the helicopter; as well as The ladder mounting cover is rotatably connected to the ladder mounting frame, and the ladder mounting cover is provided with a boarding step, which is used to step on and board the aircraft when the ladder mounting cover is opened; One end of the ladder mounting cover is provided with a locking point, and the ladder mounting frame is provided with a locking hook. When the ladder mounting cover is closed, the locking hook is used to engage the locking point. The locking hook includes: The locking hook is used to engage and disengage with the locking point; A rotating connecting part 1 is provided at one end of the locking hook part and is used to rotatably connect with the ladder mounting frame; A button is located at the other end of the locking hook portion. When the button is pressed, the locking hook portion disengages from the locking point. A torsion spring is installed on the rotating connection part, which is used to automatically reset the locking hook part when the button part is released; The ladder mounting frame is equipped with a locking mounting slot. The lock hook further includes a lock hook mounting component, which is fastened to the locking mounting groove. The lock hook mounting component includes: A limiting part, which, after the button part is released, abuts against the button part; and Rotary connecting part two, a pin passes through the rotary connecting part one and connects to the rotary connecting part two; The button portion and the locking hook portion are integrally connected, and the button portion and the locking hook portion form an obtuse angle.

2. The boarding ladder according to claim 1, characterized in that: in, The boarding ladder includes a first boarding ladder, which includes a first boarding ladder mounting frame and a first boarding ladder mounting cover. A first step is installed on the inner side of the first boarding ladder mounting cover, and forms a step surface with the inner surface of the first boarding ladder mounting cover.

3. The boarding ladder according to claim 2, characterized in that: in, The first ladder mounting cover includes a protruding limiting part and a limiting rod receiving groove. A limiting rod is installed on the first ladder mounting frame. When the first ladder mounting cover is opened, the limiting rod abuts against the protruding limiting part, so that the first ladder mounting cover is at a predetermined angle. When the first ladder mounting cover is closed, the limiting rod is placed in the limiting rod receiving groove.

4. The boarding ladder according to claim 3, Its features are: The boarding ladder further includes a second boarding ladder, which is located on one side of the first boarding ladder. The second boarding ladder includes a second boarding ladder mounting frame, which is elongated. The second ladder mounting cover is long and narrow; and The second boarding step is located at the end of the second boarding ladder mounting cover, forming a two-step board with the first boarding ladder mounting cover.

5. The boarding ladder according to claim 4, characterized in that: in, The second boarding step is rotatably connected to the second boarding ladder mounting cover. When the second boarding ladder mounting cover is opened, the second boarding step and the second boarding ladder mounting cover are set perpendicularly. When the second boarding ladder mounting cover is closed, the second boarding ladder mounting cover encloses the second boarding step within the second boarding ladder mounting frame.

6. The boarding ladder according to claim 5, characterized in that: in, The second boarding ladder mounting cover is provided with a second limiting structure, which is used to abut against the second boarding step when the second boarding ladder mounting cover is opened; the second boarding ladder also includes a rope, one end of which is connected to the second boarding ladder mounting cover, for pulling the rope upward to close the second boarding ladder mounting cover.

7. The boarding ladder according to claim 6, characterized in that: in, The second boarding ladder also includes a third boarding step, which is installed on the second boarding ladder mounting cover, forming a three-step system with the second boarding step and the first boarding ladder mounting cover.

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