Composite material airstairs with bidirectional self-locking performance

Abstract

The utility model provides a composite material airstairs with bidirectional self-locking performance, which comprises an upper half section of ladder assembly, and the top end of the upper half section of ladder assembly is connected with a friction disc assembly through a top bending section; the bottom end of the upper half section ladder frame is provided with a lower half section ladder frame through a folding mechanism; a bidirectional self-locking mechanism for locking an unfolded or folded state is mounted on the folding mechanism in a matched manner; pedals are fixedly arranged between the upper half section ladder frame and the lower half section ladder frame and are made of composite materials; and the bottom end of the lower half section of ladder frame is connected with an anti-skid supporting leg assembly. The airstairs are of a folding structure and can be conveniently folded after being used, so that the occupied space is reduced; the main body material is made of a composite material, so that the weight is effectively reduced; and meanwhile, the spring is adopted to drive the double-shaft self-locking mechanism, so that the airstairs can be quickly self-locked in an unfolded state and a folded state, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of boarding ladders, and in particular relates to a composite material boarding ladder with a two-way self-locking performance. Background Art

[0002] For some special models of aircraft, pilots need to use an external boarding ladder when entering the cockpit. The existing boarding ladder adopts an integral structure, which occupies a large storage space and is inconvenient to store. Moreover, it is mainly made of aluminum alloy profiles, which is heavy and inconvenient to carry. Utility Model Content

[0003] The utility model aims to provide a composite boarding ladder with bidirectional self-locking performance. The boarding ladder adopts a folding structure and can be conveniently folded after use to reduce the occupied space. The main body material is made of composite materials, which effectively reduces its weight. At the same time, a spring-driven biaxial self-locking mechanism is adopted, so that the boarding ladder can quickly self-lock in the open and folded states, thereby improving work efficiency.

[0004] In order to realize the above-mentioned technical features, the purpose of the utility model is achieved as follows: a composite material boarding ladder with bidirectional self-locking performance, comprising an upper ladder frame, the top of the upper ladder frame is connected with a friction disc assembly through a top curved section; the bottom end of the upper ladder frame is installed with a lower ladder frame through a folding mechanism; the folding mechanism is cooperated with a bidirectional self-locking mechanism for locking the unfolded or folded state; pedals are fixedly installed between the upper ladder frame and the lower ladder frame, and both are made of composite materials; the bottom end of the lower ladder frame is connected with an anti-slip support foot assembly.

[0005] The friction disc assembly comprises a rubber disc body, a first connecting seat is arranged on the back of the rubber disc body, the first connecting seat is connected with a first hinge seat through a first pin shaft, and the first hinge seat is arranged at the end of the top curved section.

[0006] A handle is arranged on the top of the upper half ladder frame.

[0007] The folding mechanism includes a double-ear connecting seat and a single-ear connecting seat, the double-ear connecting seat is plug-connected with the upper half of the ladder frame, and the single-ear connecting seat is plug-connected with the lower half of the ladder frame. A center hole is provided at the center of the double-ear connecting seat and the single-ear connecting seat, and a first locking hole and a second locking hole are symmetrically processed on both sides of the center hole.

[0008] Wear-resistant bushings are fixedly installed at the positions of the central hole, the first locking hole and the second locking hole.

[0009] The two-way self-locking mechanism includes a pressing handle, a central shaft is fixedly installed on the center of the end surface of the pressing handle by a connecting screw, the central shaft passes through the center hole, a connecting plate is fixed to the end of the central shaft, and a first short pin and a second short pin are symmetrically fixed to the inner end surface of the connecting plate. The first short pin and the second short pin are selectively matched with the corresponding first locking hole and the second locking hole to realize the unfolding locking or folding locking of the folding mechanism, and a spring is mounted on the end of the central shaft close to the pressing handle.

[0010] The anti-skid support foot assembly includes a second hinged seat fixed at the bottom end of the lower half ladder frame, the second hinged seat is hinged to a second connecting seat through a second pin shaft, and the bottom end of the second connecting seat is provided with an anti-skid bottom plate, and anti-skid spikes are installed on the anti-skid bottom plate.

[0011] The utility model has the following beneficial effects:

[0012] 1. The boarding ladder of the utility model adopts a foldable structure, which can be conveniently folded after use to reduce the occupied space; and the main material is made of composite materials, which effectively reduces its weight; at the same time, a spring-driven double-axis self-locking mechanism is adopted, so that the boarding ladder can quickly self-lock in the open and folded states, thereby improving work efficiency.

[0013] 2. The friction disc assembly can be used to contact the outer wall of the aircraft, thereby increasing the friction force and at the same time providing a good protective effect on the outer wall of the aircraft.

[0014] 3. The handles mentioned above make it easy to hold the handles during climbing, thereby ensuring safety during the climbing process.

[0015] 4. The folding mechanism mentioned above ensures that the boarding ladder is locked in the working state when unfolded and in the storage state when folded, thereby reducing the occupied storage space.

[0016] 5. The above-mentioned two-way self-locking mechanism can realize the locking of the ladder after it is unfolded, thereby ensuring normal boarding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 This is a three-dimensional diagram of the utility model from the first perspective.

[0019] Figure 2 This is a three-dimensional diagram from the second viewing angle of the present invention.

[0020] Figure 3 For this utility model Figure 1 Partial view of center A.

[0021] Figure 4 For this utility model Figure 1 Partial view of middle B.

[0022] Figure 5 For this utility model Figure 1 Partial view of center C.

[0023] Figure 6 For this utility model Figure 2 Medium D partial view.

[0024] Figure 7 It is a three-dimensional diagram of the folding mechanism of the utility model.

[0025] Figure 8 It is a three-dimensional diagram of the bidirectional self-locking mechanism of the utility model.

[0026] Fig. 9 This is a diagram of the locked state when the folding mechanism of the utility model is unfolded.

[0027] Fig.10 This is a diagram of the locking state of the folding mechanism of the utility model when folded.

[0028] In the figure: friction disc assembly 1, top curved section 2, upper ladder frame 3, pedal 4, handle 5, folding mechanism 6, lower ladder frame 7, anti-skid support foot assembly 8, two-way self-locking mechanism 9;

[0029] The rubber disc 101, the first connecting seat 102, the first pin shaft 103, and the first hinge seat 104;

[0030] Double-ear connection seat 601, single-ear connection seat 602, center hole 603, second locking hole 604, first locking hole 605;

[0031] A second hinge seat 801, a second pin shaft 802, a second connecting seat 803, an anti-skid bottom plate 804, and anti-skid spikes 805;

[0032] Pressing handle 901 , connecting screw 902 , central axis 903 , spring 904 , first short pin 905 , connecting plate 906 , second short pin 907 . DETAILED DESCRIPTION

[0033] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0034] See also Figure 1-10A composite boarding ladder with bidirectional self-locking performance comprises an upper ladder frame 3, the top of which is connected to a friction disc assembly 1 through a top curved section 2; a lower ladder frame 7 is installed at the bottom of the upper ladder frame 3 through a folding mechanism 6; a bidirectional self-locking mechanism 9 for locking the unfolded or folded state is installed on the folding mechanism 6; pedals 4 are fixedly installed between the upper ladder frame 3 and the lower ladder frame 7, respectively, and both are made of composite materials; an anti-slip foot support assembly 8 is connected at the bottom of the lower ladder frame 7. This boarding ladder adopts a folding structure, which can be conveniently folded after use to reduce the occupied space; and the main material is made of composite materials, which effectively reduces its weight; at the same time, a spring-driven double-axis self-locking mechanism is adopted, so that the boarding ladder can quickly self-lock in the open and folded states, thereby improving work efficiency. In the specific use process, the upper ladder frame 3 and the lower ladder frame 7 are hinged by adopting the folding mechanism 6, so as to facilitate the folding of the two, so as to achieve the purpose of folding to reduce space. The unfolded or folded state can be locked by the two-way self-locking mechanism 9 .

[0035] Furthermore, the friction disc assembly 1 includes a rubber disc body 101, a first connection seat 102 is disposed on the back of the rubber disc body 101, the first connection seat 102 is connected to a first hinge seat 104 via a first pin shaft 103, and the first hinge seat 104 is disposed at the end of the top curved section 2. The friction disc assembly 1 can be used to contact the outer wall of the aircraft, thereby increasing the friction force and at the same time having a good protective effect on the outer wall of the aircraft.

[0036] Further, a handle 5 is provided on the top of the upper half ladder frame 3. The handle 5 is convenient for holding the handle 5 during climbing, thereby ensuring the safety during climbing.

[0037] Furthermore, the folding mechanism 6 includes a double-ear connection seat 601 and a single-ear connection seat 602, the double-ear connection seat 601 is plug-connected with the upper half ladder frame 3, and the single-ear connection seat 602 is plug-connected with the lower half ladder frame 7. The central parts of the double-ear connection seat 601 and the single-ear connection seat 602 are provided with a central hole 603, and the two sides of the central hole 603 are symmetrically processed with a first locking hole 605 and a second locking hole 604. The above-mentioned folding mechanism 6 ensures that the two-way self-locking mechanism 9 with two-way 180° self-locking is locked in the working state when the boarding ladder is unfolded and in the storage state when folded, thereby reducing the storage space occupied.

[0038] Furthermore, wear-resistant bushings are fixedly installed at the positions of the central hole 603, the first locking hole 605 and the second locking hole 604. The wear-resistant bushings play an effect of reducing friction in the subsequent process.

[0039] Further, the two-way self-locking mechanism 9 includes a pressing handle 901, a central shaft 903 is fixedly installed at the center of the end surface of the pressing handle 901 through a connecting screw 902, the central shaft 903 passes through the central hole 603, a connecting plate 906 is fixed to the end of the central shaft 903, a first short pin 905 and a second short pin 907 are symmetrically fixed to the inner end surface of the connecting plate 906, and the first short pin 905 and the second short pin 907 are selectively matched with the corresponding first locking hole 605 and the second locking hole 604 to achieve the unfolding locking or folding locking of the folding mechanism 6, and the central shaft 903 is sleeved with a spring 904 at one end close to the pressing handle 901. The above-mentioned two-way self-locking mechanism 9 can achieve the locking of the ladder after unfolding, thereby ensuring normal boarding operation. During the specific working process, when the ladder needs to be unfolded, the pressing handle 901 is manually pressed, and the pressing handle 901 will compress the spring 904 and push out the connecting plate 906 through the central axis 903, so that the first short pin 905 and the second short pin 907 are disengaged from the corresponding first locking hole 605 and the second locking hole 604, and then the folding mechanism 6 is rotated and folded. After it is rotated into place, the pressing handle 901 is released. At this time, the spring 904 will pop up the central axis 903, and then drive the connecting plate 906 through the central axis 903, and then reinsert the first short pin 905 and the second short pin 907 into the first locking hole 605 and the second locking hole 604 through the connecting plate 906, thereby achieving the locking purpose.

[0040] Furthermore, the anti-skid foot support assembly 8 comprises a second hinged seat 801 fixed at the bottom end of the lower half ladder frame 7, the second hinged seat 801 is hingedly connected to a second connecting seat 803 via a second pin shaft 802, an anti-skid bottom plate 804 is arranged at the bottom end of the second connecting seat 803, and anti-skid spikes 805 are installed on the anti-skid bottom plate 804. The anti-skid foot support assembly 8 has an anti-skid effect, thereby ensuring safety during climbing.

[0041] The specific working process and principle of this utility model:

[0042] When the unfolded state of the boarding ladder is converted into the folded state for storage, the pressing handle 901 of the two-way self-locking mechanism 9 is pressed and the pressing handle 901 is rotated. At the same time, the first short pin 905 and the second short pin 907 can be rotated. At this time, the boarding ladder frame is turned over. Then the pressing handle 901 is rotated accordingly. The first short pin 905 and the second short pin 907 are inserted into the corresponding first locking hole 605 and the second locking hole 604, and the spring pressure completes the self-locking.

Claims

1. A composite boarding ladder with bidirectional self-locking performance, characterized in that: The invention comprises an upper ladder frame (3), the top end of which is connected to a friction disc assembly (1) via a top curved section (2); the bottom end of the upper ladder frame (3) is mounted with a lower ladder frame (7) via a folding mechanism (6); the folding mechanism (6) is equipped with a bidirectional self-locking mechanism (9) for locking the unfolded or folded state; pedals (4) are fixedly mounted between the upper ladder frame (3) and the lower ladder frame (7), and are both made of composite materials; the bottom end of the lower ladder frame (7) is connected to an anti-skid foot support assembly (8).

2. A composite boarding ladder with bidirectional self-locking performance according to claim 1, characterized in that: The friction disc assembly (1) comprises a rubber disc body (101), a first connecting seat (102) being arranged on the back of the rubber disc body (101), the first connecting seat (102) being connected to a first hinge seat (104) via a first pin shaft (103), and the first hinge seat (104) being arranged at the end of the top curved section (2).

3. A composite boarding ladder with bidirectional self-locking performance according to claim 1, characterized in that: A handle (5) is provided on the top of the upper ladder frame (3).

4. The composite boarding ladder with bidirectional self-locking performance according to claim 1, characterized in that: The folding mechanism (6) comprises a double-ear connection seat (601) and a single-ear connection seat (602); the double-ear connection seat (601) is plug-connected to the upper half ladder frame (3); the single-ear connection seat (602) is plug-connected to the lower half ladder frame (7); a central hole (603) is provided at the central part of the double-ear connection seat (601) and the single-ear connection seat (602); and a first locking hole (605) and a second locking hole (604) are symmetrically processed on both sides of the central hole (603).

5. A composite boarding ladder with bidirectional self-locking performance according to claim 4, characterized in that: Wear-resistant bushings are fixedly installed at the locations of the central hole (603), the first locking hole (605) and the second locking hole (604).

6. A composite boarding ladder with bidirectional self-locking performance according to claim 4, characterized in that: The bidirectional self-locking mechanism (9) comprises a pressing handle (901), a central shaft (903) is fixedly mounted on the central part of the end surface of the pressing handle (901) via a connecting screw (902), the central shaft (903) passes through the central hole (603), a connecting plate (906) is fixed to the end of the central shaft (903), a first short pin (905) and a second short pin (907) are symmetrically fixed to the inner end surface of the connecting plate (906), and the first short pin (905) and the second short pin (907) are selectively matched with the corresponding first locking hole (605) and the second locking hole (604) to realize the unfolding locking or folding locking of the folding mechanism (6), and a spring (904) is sleeved on one end of the central shaft (903) close to the pressing handle (901).

7. The composite boarding ladder with bidirectional self-locking performance according to claim 1, characterized in that: The anti-skid support foot assembly (8) comprises a second hinged seat (801) fixed to the bottom end of the lower half ladder frame (7); the second hinged seat (801) is hingedly connected to a second connecting seat (803) via a second pin shaft (802); an anti-skid bottom plate (804) is arranged at the bottom end of the second connecting seat (803); and anti-skid spikes (805) are installed on the anti-skid bottom plate (804).

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