Folding boarding ladder and aircraft

Abstract

The present invention discloses a foldable boarding ladder and an aircraft. The foldable boarding ladder comprises: a folding and unfolding mechanism, comprising: a telescopic member and a connecting rod assembly, the telescopic member is extendably arranged in a storage compartment via a folding and unfolding opening, the telescopic member moves between a first position and a second position along a first direction, and the connecting rod assembly is connected to the telescopic member; a pedal, the pedal is connected to the connecting rod assembly to be folded and unfolded along with the folding and unfolding mechanism; a driving mechanism is transmission-connected with the telescopic member to drive the telescopic member to move; the connecting rod assembly is constructed such that when the telescopic member is in a first position, the connecting rod assembly is folded, so that the connecting rod assembly, the pedal and the telescopic member are stored in the storage compartment, the pedal blocks the folding and unfolding opening, and a side surface of the pedal facing away from the folding and unfolding mechanism matches the outer surface of the fuselage, and when the telescopic member is in a second position, the connecting rod assembly is unfolded, so that the pedal is unfolded outside the storage compartment. The foldable boarding ladder of the present invention can be carried randomly, is easy to fold and unfold, and meets the lightweight requirements of the aircraft.

Description

Technical Field

[0001] The invention relates to the field of aircraft, and in particular to a foldable boarding ladder and an aircraft. Background Art

[0002] In the design of electric vertical take-off and landing aircraft (eVTOL), boarding stairs, as an important part of manned aircraft, directly affect the safety and efficiency of passengers boarding. Most traditional boarding stairs are fixed on the ground and cannot meet the needs of eVTOL for flexible deployment and rapid response. In addition, existing boarding stairs have many deficiencies in folding and automation. They are usually unable to achieve full folding or automated operation, resulting in difficulties in random installation, large size, and increased weight and complexity of the aircraft. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a foldable boarding ladder and an aircraft, wherein the foldable boarding ladder can be carried randomly, automatically stored, conveniently folded and unfolded, and has a fast response speed, which is conducive to meeting the lightweight design requirements of the aircraft.

[0004] In a first aspect, an embodiment of the present invention provides a foldable boarding ladder, which is applied to an aircraft, wherein the fuselage of the aircraft has a storage compartment and a storage opening connected to the storage compartment, the foldable boarding ladder comprises: a storage and extension mechanism, comprising: a telescopic member and a connecting rod assembly, the telescopic member is extendably arranged in the storage compartment via the storage opening, the telescopic member moves between a first position and a second position along a first direction, and the connecting rod assembly is connected to the telescopic member; a pedal, the pedal is connected to the connecting rod assembly to be retracted and extended along with the storage and extension mechanism; a driving mechanism is transmission-connected to the telescopic member to drive the telescopic member to move; the connecting rod assembly is constructed so that when the telescopic member is in the first position, the connecting rod assembly is folded, so that the connecting rod assembly, the pedal and the telescopic member are stored in the storage compartment, the pedal blocks the storage opening, and a side surface of the pedal facing away from the storage and extension mechanism matches the outer surface of the fuselage, and when the telescopic member is in the second position, the connecting rod assembly is unfolded, so that the pedal is unfolded outside the storage compartment.

[0005] The foldable boarding ladder of the present invention can be stored in a storage compartment and is convenient to carry. Under the action of the driving mechanism, the telescopic member of the folding and unfolding mechanism performs telescopic movement between a first position and a second position, so that the foldable boarding ladder can be folded and unfolded, with a high degree of automation, and the folding and unfolding of the foldable boarding ladder is convenient. The foldable boarding ladder only includes a folding and unfolding mechanism, a pedal, and a driving mechanism, wherein the pedal is a fuselage structural member when folded in the first state, and the overall structure is simple, which is conducive to meeting the lightweight requirements of the aircraft.

[0006] In some embodiments, the connecting rod assembly includes two groups of first retractable devices arranged at intervals along the second direction, the first retractable device includes a first connecting rod, a first rocker rod and a first retractable rod, the first connecting rod is arranged parallel to the telescopic member, the two ends of the first rocker rod are rotatably connected to the telescopic member and the first connecting rod respectively, the two ends of the first retractable rod are connected to the telescopic member and the pedal respectively, the first retractable rod also includes a connection point located between the two ends, the connection point is rotatably connected to the first connecting rod, and the first rocker rod is arranged parallel to the first retractable rod.

[0007] According to some embodiments of the present invention, the retracting and deploying mechanism further includes: an auxiliary retracting device, wherein the auxiliary retracting device is disposed in the storage cabin, and the auxiliary retracting device is constructed to push the first rocker rod when the telescopic member moves toward the first position, and the first rocker rod swings to drive the first connecting rod and the first retracting and deploying rod to move, so that the first connecting rod, the first rocker rod, the first retracting and deploying rod and the telescopic member overlap.

[0008] According to some embodiments of the present invention, the auxiliary contraction device has a limit end, and when the telescopic member is in the first position, the limit end abuts against the side wall of the first connecting rod, and the first connecting rod and the first rocker rod are located above the limit end; when the telescopic member is in the second position, the limit end is spaced apart from the first connecting rod, and the first connecting rod is located below the limit end.

[0009] According to some embodiments of the present invention, when the telescopic member is in the second position, the limit end contacts the first swing rod, and / or when the telescopic member is in the second position, the limit end is spaced apart from the first swing rod.

[0010] According to some embodiments of the present invention, the pedal is arranged in parallel with the telescopic member, and the connecting rod assembly also includes a second retractable rod, both ends of which are rotatably connected to the telescopic member and the pedal respectively, and the second retractable rod and the first retractable rod are parallel to and spaced apart from each other along the first direction.

[0011] According to some embodiments of the present invention, the connecting rod assembly further includes a stabilizing rod, both ends of which are rotatably connected to the middle portion of the first retractable rod and the middle portion of the second retractable rod, respectively, and the stabilizing rod is parallel to the telescopic member.

[0012] According to some embodiments of the present invention, the connecting rod assembly also includes a second swing rod, both ends of which are rotatably connected to the telescopic member and the middle part of the first connecting rod, respectively, and the second swing rod, the first swing rod and the first retractable and extendable rod are arranged in parallel.

[0013] In some embodiments, it also includes: a guide member, the guide member is arranged in the storage compartment, and the telescopic member cooperates with the guide member to guide along the first direction.

[0014] In a second aspect, an embodiment of the present invention further provides an aircraft, comprising: a fuselage, defining a storage compartment; and the above-mentioned folding boarding ladder, wherein the folding boarding ladder is arranged in the storage compartment.

[0015] The aircraft of the present invention is provided with the foldable boarding ladder, which is automatically folded and unfolded when the aircraft takes off and lands, making it convenient for passengers to get on and off the aircraft. The foldable boarding ladder has a simple structure and occupies less space inside the aircraft, which is conducive to improving the utilization rate of the interior space of the aircraft. At the same time, it meets the lightweight requirements of the aircraft, ensures the endurance of the aircraft, and thus improves user satisfaction.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is one of the structural schematic diagrams of the foldable boarding ladder of an embodiment of the present invention;

[0019] Figure 2 This is the second structural schematic diagram of the foldable boarding ladder according to an embodiment of the present invention;

[0020] Figure 3 is a partial structural schematic diagram of a foldable boarding ladder according to an embodiment of the present invention;

[0021] Figure 4 is a state diagram of a retractable device when the telescopic member of the embodiment of the present invention is located at a first position;

[0022] Figure 5 is a state diagram of a retractable device when the telescopic member of the embodiment of the present invention is located between the first position and the second position;

[0023] Figure 6 is a state diagram of a retractable device when the telescopic member of the embodiment of the present invention is located at the second position;

[0024] Figure 7 is a state diagram of the foldable boarding ladder on the aircraft when the telescopic member of the embodiment of the present invention is in the first position;

[0025] Figure 81 is a state diagram of the foldable boarding ladder on the aircraft when the telescopic member according to an embodiment of the present invention is in the second position.

[0026] Reference numerals:

[0027] 100-Folding boarding ladder;

[0028] 110-folding and unfolding mechanism; 111-retractable member;

[0029] 112-connecting rod assembly; 1120-first retractable device; 1121-first connecting rod; 1122-first swing rod; 1123-first retractable rod; 1123a-connecting point; 1124-second retractable rod; 1125-stabilizing rod; 1126-second swing rod;

[0030] 113- auxiliary contraction device; 1131- limit end;

[0031] 120- pedals;

[0032] 130-driving mechanism; 131-driving member; 132-transmission device;

[0033] 140-guide member;

[0034] 200 - aircraft;

[0035] 210-Storage compartment. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] Most of the existing boarding ladders are fixed on the ground, which cannot meet the needs of eVTOL for flexible deployment and rapid response. Existing boarding ladders are usually unable to achieve full folding or automatic operation, resulting in difficulties in random installation, large size, and increased weight and complexity of the aircraft.

[0038] In view of this, the present invention provides a foldable boarding ladder and an aircraft. The foldable boarding ladder can be carried randomly, stored automatically, is easy to fold and unfold, has a fast response speed, and is conducive to meeting the lightweight design requirements of the aircraft.

[0039] refer to Figures 1 to 8 In a first aspect, an embodiment of the present invention provides a foldable boarding ladder 100 , which can be applied to an aircraft 200 , wherein a fuselage of the aircraft 200 has a storage compartment 210 and a storage opening connected to the storage compartment 210 .

[0040] The foldable boarding ladder 100 may include a folding and unfolding mechanism 110 , a step 120 , and a driving mechanism 130 .

[0041] The retractable mechanism 110 may include a telescopic member 111 and a connecting rod assembly 112. The telescopic member 111 is disposed in the storage compartment 210 and can be extended through the retractable opening. The telescopic member 111 is extended along a first direction (eg Figure 6 The pedal 120 is connected to the connecting rod assembly 112 to be retracted and extended along with the retracting and extending mechanism 110.

[0042] When the telescopic member 111 moves between the first position and the second position, the connecting rod assembly 112 is driven to move synchronously, thereby completing the folding and unfolding of the foldable boarding ladder 100. For example, when the telescopic member 111 is located at the first position, the connecting rod assembly 112 is folded, so that the connecting rod assembly 112, the pedal 120 and the telescopic member 111 are stored in the storage compartment 210, and when the telescopic member 111 is located at the second position, the connecting rod assembly 112 is unfolded, so that the pedal 120 is unfolded outside the storage compartment 210. In this way, the foldable boarding ladder 100 of this embodiment has a high degree of automation and convenient folding and unfolding operations.

[0043] The telescopic member 111 moves from the second position to the first position, driving the connecting rod assembly 112 to fold the pedal 120. The folding method can be that the connecting rod assembly 112 and the pedal 120 are folded to a state flush with the telescopic member 111, and are stored in the storage compartment 210 with the telescopic member 111, which occupies a small space and is conducive to the lightweight design of the aircraft 200. Alternatively, the folding method of the folding structure can also be that the telescopic member 111 moves from the second position to the first position, and the pedal 120 is turned over by the connecting rod assembly 112 and stored in the storage compartment 210. The process of the telescopic member 111 moving from the first position to the second position to unfold the foldable boarding ladder 100 is opposite to the above-mentioned folding process, which will not be repeated here.

[0044] The driving mechanism 130 is connected to the telescopic member 111 in transmission connection to drive the telescopic member 111 to move, wherein the transmission connection between the driving mechanism 130 and the telescopic member 111 may include but is not limited to gear transmission, chain transmission, or directly pushing the telescopic member 111 to telescope.

[0045] In addition, when the telescopic member 111 is in the first position, the pedal 120 blocks the storage opening, and the side surface of the pedal 120 facing away from the storage and deployment mechanism 110 matches the outer surface of the fuselage, so that the pedal 120 forms a fuselage structural member of the aircraft 200. After the pedal 120 blocks the storage opening, the side surface of the pedal 120 facing away from the storage and deployment mechanism 110 can overlap with the curved surface of the fuselage surface, which can ensure the beauty of the fuselage appearance and ensure that the aerodynamic performance of the aircraft 200 is not affected. When the telescopic member 111 is in the second position, the connecting rod assembly 112 is unfolded, so that the pedal 120 is unfolded outside the storage cabin 210, and the passengers get on and off the aircraft 200 through the pedal 120.

[0046] The foldable boarding ladder 100 of the present invention can be stored in the storage compartment 210 and is convenient to carry. This allows passengers to board and disembark in non-airport areas, thereby increasing the applicable area of ​​the aircraft 200. Under the action of the drive mechanism 130, the telescopic member 111 of the folding and unfolding mechanism 110 performs telescopic movement between a first position and a second position, so that the foldable boarding ladder 100 can be folded and unfolded, with a high degree of automation, and the folding and unfolding of the foldable boarding ladder 100 is convenient. The foldable boarding ladder 100 only includes the folding and unfolding mechanism 110, the pedal 120, and the drive mechanism 130, wherein the pedal 120 constitutes a fuselage structural member when folded in the first state, and the overall structure is simple, which is conducive to meeting the lightweight requirements of the aircraft 200.

[0047] refer to Figure 1 , Figure 3 and Figure 6 In some embodiments, the connecting rod assembly 112 may include two groups of first retractable devices 1120 spaced apart along the second direction. The first retractable device 1120 may include a first connecting rod 1121, a first swing rod 1122, and a first retractable rod 1123. The first connecting rod 1121 is arranged in parallel with the telescopic member 111. The two ends of the first swing rod 1122 are rotatably connected to the telescopic member 111 and the first connecting rod 1121, respectively. The two ends of the first retractable rod 1123 are connected to the telescopic member 111 and the pedal 120, respectively. The first retractable rod 1123 also includes a connection point 1123a located between the two ends. The connection point 1123a is rotatably connected to the first connecting rod 1121. The first swing rod 1122 is arranged in parallel with the first retractable rod 1123.

[0048] It can be understood that the two ends of the pedal 120 are rotatably connected to the first retracting and unfolding rods 1123 of the two first retracting and unfolding devices 1120 respectively. The first connecting rod 1121, the first swing rod 1122 and the first retracting and unfolding rod 1123 of the first retracting and unfolding device 1120 can form a parallelogram structure with the telescopic member 111, because the four sides of the parallelogram mechanism always maintain the property of being relatively parallel to each other. During the movement of the telescopic member 111 between the first position and the second position along the first direction, the first swing rods 1122 of the two first retracting and unfolding devices 1120 will swing, thereby driving the two first retracting and unfolding rods 1123 to swing synchronously, thereby driving the pedal 120 to be folded and unfolded.

[0049] The swing of the first swing arm 1122 may be caused by a trigger device (such as the auxiliary retraction device 113 described below) disposed in the storage compartment 210 exerting an action on the first connecting rod 1121 or the first swing arm 1122 .

[0050] refer to Figure 1 and Figure 2 According to some embodiments of the present invention, the folding and unfolding mechanism 110 may further include: an auxiliary contraction device 113, the auxiliary contraction device 113 is arranged in the storage cabin 210, when the telescopic member 111 moves toward the first position, the auxiliary contraction device 113 pushes the first swing rod 1122, the first swing rod 1122 swings to drive the first connecting rod 1121 and the first folding and unfolding rod 1123 to move, so that the first connecting rod 1121, the first swing rod 1122, the first folding and unfolding rod 1123 and the telescopic member 111 overlap. For example, when the telescopic member 111 moves from the second position to the first position, the auxiliary retracting device 113 may have a lifting surface. When the first retracting device 1120 moves to the first position along with the telescopic member 111, the auxiliary retracting device 113 acts on the first swing rod 1122, causing the first swing rod 1122 to swing, gradually lifting the first connecting rod 1121, so that the spacing between the first connecting rod 1121 and the telescopic member 111 changes, and then the first swing rod 1122 swings to be flush with the telescopic member 111. At this time, the first connecting rod 1121 is completely moved to the top of the auxiliary retracting device 113. At this time, the first connecting rod 1121, the first swing rod 1122, the first retracting rod 1123 and the telescopic member 111 overlap, so that the internal space of the aircraft 200 occupied by the foldable boarding ladder 100 is small, which is conducive to improving the utilization rate of the internal space of the aircraft 200. On the other hand, the structure of the retracting and extending mechanism 110 is simple, which is conducive to meeting the lightweight requirement of the aircraft 200, thereby ensuring the flight time of the aircraft 200.

[0051] refer to Figure 2 , Figure 4 , Figure 5 and Figure 6According to some embodiments of the present invention, the auxiliary contraction device 113 has a limiting end 1131, and the limiting end 1131 may have the above-mentioned lifting surface, and the lifting surface may be an inclined surface, or the lifting surface may also be a curved surface.

[0052] refer to Figure 4 When the telescopic member 111 is in the first position, the limit end 1131 abuts against the side wall of the first connecting rod 1121, the first connecting rod 1121 and the first swing rod 1122 are located above the limit end 1131, and the four-bar structure formed by the first connecting rod 1121, the first swing rod 1122, the first retractable rod 1123 and the telescopic member 111 is contracted to a linear overlapping state, so that the internal space of the aircraft 200 is occupied as little as possible; when the telescopic member 111 is in the second position, the limit end 1131 is spaced from the first connecting rod 1121, and the first connecting rod 1121 is located below the limit end 1131. At this time, the first connecting rod 1121 is separated from the limit end 1131 and is no longer lifted by the limit end 1131. The first connecting rod 1121 moves horizontally in space, and the distance between it and the telescopic member 111 increases. The first swing rod 1122 and the first retractable rod 1123 swing, so that the pedal 120 is unfolded. The structure is simple and the folding and unfolding process of the folding boarding ladder 100 is convenient. On the one hand, it is conducive to meeting the lightweight requirement of the aircraft 200. On the other hand, the structural reliability of the folding boarding ladder 100 is high.

[0053] It can be understood that in different installation modes, when the telescopic member 111 is in the second position, the first swing rod 1122 can be located on the left side of the limit end 1131 (see Figure 6 ), of course, when the telescopic member 111 is in the second position, the first swing rod 1122 can also be located on the right side of the limit end 1131 (not shown in the figure). At this time, the moving direction of the telescopic member 111 when the folding boarding ladder 100 is folded and extended is opposite to that in the present embodiment.

[0054] refer to Figure 6 According to some embodiments of the present invention, when the telescopic member 111 is in the second position, the limiting end 1131 contacts the first swing rod 1122 .

[0055] It can be understood that when the telescopic member 111 is in the first position, the limit end 1131 pushes against the first connecting rod 1121 above. At this time, the first connecting rod 1121, the first swing rod 1122, the first retractable rod 1123 and the telescopic member 111 form overlapping straight lines. The telescopic member 111 moves to the second position. It only needs the limit end 1131 to be disconnected from the first connecting rod 1121. Under the action of gravity, the first connecting rod 1121 and the telescopic member 111 are staggered, and the first swing rod 1122 will begin to swing. When the folding boarding ladder 100 is unfolded to the extreme position, the limit end 1131 can contact the first swing rod 1122. Of course, the limit end 1131 can be disconnected from the first retractable device 1120, that is, when the telescopic member 111 is in the second position, the limit end 1131 can be spaced apart from the first swing rod 1122. In this way, the structural reliability of the folding boarding ladder 100 in the unfolded state is improved.

[0056] refer to Figure 6 According to some embodiments of the present invention, the pedal 120 is arranged in parallel with the telescopic member 111, and the connecting rod assembly 112 further includes a second retractable rod 1124, the two ends of which are rotatably connected to the telescopic member 111 and the pedal 120, respectively, and the second retractable rod 1124 is arranged parallel to and spaced from the first retractable rod 1123 along the first direction. In this way, the first retractable rod 1123, the second retractable rod 1124, the pedal 120 and the telescopic member 111 form another parallel four-bar structure, and since the telescopic member 111 does not rotate, during the folding and unfolding process of the folding boarding ladder 100, the pedal 120 moves in a horizontal direction, and the folding and unfolding process of the pedal 120 is more stable. In other words, when the foldable boarding ladder 100 is in a folded state, the pedal 120, the first rocker arm 1122, the first connecting rod 1121, the first retractable rod 1123, the second retractable rod 1124 and the telescopic member 111 form a linear overlapping structure, further reducing the occupied internal space of the aircraft 200.

[0057] It can be understood that the step 120 moves horizontally during the process of folding and unfolding the foldable boarding ladder 100, and does not have a flipping action. In this way, the step 120 blocks the storage opening when it is folded in the storage compartment 210. In this way, the opening area of ​​the storage opening where the end surface of the step 120 facing away from the telescopic member 111 matches the outer surface of the fuselage is small, so the aerodynamic performance of the aircraft 200 is slightly affected.

[0058] refer to Figure 6According to some embodiments of the present invention, the connecting rod assembly 112 may further include a stabilizing rod 1125, the two ends of which are rotatably connected to the middle of the first retractable rod 1123 and the middle of the second retractable rod 1124, respectively, and the stabilizing rod 1125 is parallel to the telescopic member 111. In this way, the stabilizing rod 1125 is used as a reinforcement structure to improve the stability of the parallel four-bar structure formed by the first retractable rod 1123, the second retractable rod 1124, the pedal 120 and the telescopic member 111, thereby making the folding and unfolding process of the pedal 120 more stable, and improving the structural reliability of the foldable boarding ladder 100.

[0059] refer to Figure 4 , Figure 5 and Figure 6 According to some embodiments of the present invention, the connecting rod assembly 112 may further include a second swing rod 1126, the two ends of which are rotatably connected to the telescopic member 111 and the middle of the first connecting rod 1121, respectively, and the second swing rod 1126, the first swing rod 1122 and the first retractable rod 1123 are arranged in parallel. Since the length of the first connecting rod 1121 is relatively long, when the limiting end 1131 just starts to push and lift the end of the first connecting rod 1121 away from the pedal 120, the end of the first connecting rod 1121 close to the pedal 120 may sag under the action of gravity, which may cause the first connecting rod 1121 to break. By setting the second swing rod 1126 as a reinforcement structure, the stability of the four-rod structure formed by the first connecting rod 1121, the first swing rod 1122, the first retractable rod 1123 and the telescopic member 111 is improved, so that the unfolding and folding operations of the folding boarding ladder 100 are more reliable.

[0060] refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the foldable boarding ladder 100 may further include a guide member 140, which is disposed in the storage compartment 210, and the telescopic member 111 cooperates with the guide member 140 in a first direction. For example, the guide member 140 may be a guide rail or a guide column, which extends in the first direction, and the telescopic member 111 is provided with a slot that cooperates with the guide rail, or a ring that cooperates with the guide column, so that the accuracy of the telescopic movement of the telescopic member 111 is improved, thereby improving the reliability of the structure of the foldable boarding ladder 100.

[0061] refer to Figure 1In some embodiments, the driving mechanism 130 may include a driving member 131 and a transmission device 132, wherein the transmission device 132 is respectively connected to the driving member 131 and the telescopic member 111, and the driving member 131 drives the telescopic member 111 to move through the transmission device 132. Thus, by controlling the driving member 131 to drive the telescopic member 111 to extend and retract, the folding and unfolding of the foldable boarding ladder 100 can be automatically performed, thereby reducing the operation complexity of the foldable boarding ladder 100.

[0062] Further, the driving member 131 includes at least one of a telescopic cylinder and a driving motor. For example, the driving member 131 may be a telescopic cylinder, and the telescopic end of the telescopic cylinder is fixedly connected to the telescopic member 111, or the telescopic end of the telescopic cylinder may directly constitute the telescopic member 111. Alternatively, the driving member 131 may also be a driving motor, and the driving motor enables the telescopic member 111 to telescope through the transmission device 132. Of course, the driving member 131 may also be a combination of a telescopic cylinder and a driving motor, and the telescopic member 111 is enabled to telescope through the transmission device 132.

[0063] The transmission device 132 may include: at least one of a gear rack device, a ball screw device, and a transmission chain device. For example, the transmission device 132 may be a gear rack device, wherein the gear is disposed at the output end of the driving motor, the rack is disposed on the telescopic member 111, and the rack extends along the first direction, the gear is meshed with the rack, and the driving motor drives the telescopic member 111 to telescopically move through the gear rack device. Alternatively, the transmission device 132 may also be a ball screw device, wherein the lead screw is rotatably connected to one end of the telescopic member 111, and the driving motor drives the lead screw to rotate and move along the first direction, thereby driving the telescopic member 111 to telescopically move along the first direction. Alternatively, the driving member 131 and the telescopic member 111 may also be transmitted through a transmission chain device.

[0064] The principles of the foldable boarding ladder 100 of the present invention are:

[0065] refer to Figure 4 , the telescopic member 111 is in the first position, the pedal 120, the first rocker arm 1122, the first connecting rod 1121, the first retractable rod 1123, the second retractable rod 1124 and the telescopic member 111 form a linear overlapping structure, which is stored in the storage compartment 210. At this time, the pedal 120 blocks the retractable opening, and the surface of the side of the pedal 120 facing away from the retractable mechanism 110 is flush with the outer surface of the fuselage.

[0066] refer to Figure 5, the driving mechanism 130 is started, so that the telescopic member 111 moves from the first position to the second position, the first retractable device 1120 moves out of the retractable opening along with the telescopic member 111, and the first connecting rod 1121 slides along the upper side of the limit end 1131 until the first connecting rod 1121 is disconnected from the limit end 1131, at which time the pedal 120 is completely extended out of the retractable opening. The telescopic member 111 continues to move to the second position, the limit end 1131 begins to contact the first swing rod 1122, the first swing rod 1122 begins to swing, and the pedal 120 is extended in space in a parallel manner to the first direction.

[0067] refer to Figure 6 , until the telescopic member 111 reaches the second position, the pedal 120 is fully unfolded, and the unfolding process of the foldable boarding ladder 100 is completed.

[0068] The folding process of the foldable boarding ladder 100 is opposite to the unfolding process, which will not be described in detail here.

[0069] refer to Figure 7 and Figure 8 In a second aspect, an embodiment of the present invention further provides an aircraft 200 , comprising: a fuselage, defining a storage compartment 210 ; and the above-mentioned folding boarding ladder 100 , wherein the folding boarding ladder 100 is disposed in the storage compartment 210 .

[0070] The aircraft 200 of the present invention is provided with the foldable boarding ladder 100, and the foldable boarding ladder 100 is automatically folded and unfolded when the aircraft 200 takes off and lands, so that passengers can conveniently get on and off the aircraft 200. The foldable boarding ladder 100 has a simple structure and occupies less space inside the aircraft 200, which is conducive to improving the utilization rate of the space inside the aircraft 200. At the same time, it meets the lightweight requirements of the aircraft 200, ensures the endurance of the aircraft 200, and thus improves user satisfaction.

[0071] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0072] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0073] In the description of the present invention, "plurality" means two or more.

[0074] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0075] In the description of the present invention, "above", "over" and "on" a first feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0077] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A foldable boarding ladder (100), applied to an aircraft (200), wherein the fuselage of the aircraft (200) comprises a storage compartment (210) and a storage opening communicating with the storage compartment (210), characterized in that: The foldable boarding ladder (100) comprises: The retractable and unfoldable mechanism (110) comprises: a telescopic member (111) and a connecting rod assembly (112); the telescopic member (111) is disposed in the storage compartment (210) so as to be extendable via the retractable and unfoldable opening; the telescopic member (111) moves between a first position and a second position along a first direction; and the connecting rod assembly (112) is connected to the telescopic member (111); a pedal (120), the pedal (120) being connected to the connecting rod assembly (112) so as to be retracted and extended along with the retracting and extending mechanism (110); A driving mechanism (130) is transmission-connected to the telescopic member (111) to drive the telescopic member (111) to move; The connecting rod assembly (112) is constructed such that when the telescopic member (111) is located at the first position, the connecting rod assembly (112) is folded, so that the connecting rod assembly (112), the pedal (120) and the telescopic member (111) are stored in the storage compartment (210); the pedal (120) blocks the storage opening, and a side surface of the pedal (120) facing away from the storage and unfolding mechanism (110) matches an outer surface of the fuselage; when the telescopic member (111) is located at the second position, the connecting rod assembly (112) is unfolded, so that the pedal (120) is unfolded outside the storage compartment (210); The connecting rod assembly (112) comprises two groups of first retractable and extendable devices (1120) arranged at intervals along the second direction, the first retractable and extendable devices (1120) comprising a first connecting rod (1121), a first swing rod (1122) and a first retractable and extendable rod (1123), the first connecting rod (1121) being arranged in parallel with the telescopic member (111), the two ends of the first swing rod (1122) being rotatably connected to the telescopic member (111) and the first connecting rod (1121), the two ends of the first retractable and extendable rod (1123) being connected to the telescopic member (111) and the pedal (120), the first retractable and extendable rod (1123) further comprising a connection point (1123a) located between the two ends, the connection point (1123a) being rotatably connected to the first connecting rod (1121), the first swing rod (1122) being arranged in parallel with the first retractable and extendable rod (1123); The folding and unfolding mechanism (110) further comprises: an auxiliary contraction device (113), wherein the auxiliary contraction device (113) is arranged in the storage cabin (210). The auxiliary retraction device (113) is constructed to push the first swing rod (1122) when the telescopic member (111) moves toward the first position, and the first swing rod (1122) swings to drive the first connecting rod (1121) and the first retractable rod (1123) to move, so that the first connecting rod (1121), the first swing rod (1122), the first retractable rod (1123) and the telescopic member (111) overlap.

2. The foldable boarding ladder (100) according to claim 1, characterized in that: The auxiliary contraction device (113) has a limiting end (1131), and when the telescopic member (111) is in the first position, the limiting end (1131) abuts against a side wall of the first connecting rod (1121), and the first connecting rod (1121) and the first swing rod (1122) are located above the limiting end (1131); When the telescopic member (111) is in the second position, the limiting end (1131) and the first connecting rod (1121) are arranged at a distance, and the first connecting rod (1121) is located below the limiting end (1131).

3. The foldable boarding ladder (100) according to claim 2, characterized in that: When the telescopic member (111) is in the second position, the limiting end (1131) contacts the first swing rod (1122), or, When the telescopic member (111) is in the second position, the limiting end (1131) and the first swing rod (1122) are spaced apart.

4. The foldable boarding ladder (100) according to claim 1, characterized in that: The pedal (120) is arranged in parallel with the telescopic member (111), and the connecting rod assembly (112) further comprises a second retractable rod (1124), two ends of the second retractable rod (1124) are rotatably connected to the telescopic member (111) and the pedal (120), and the second retractable rod (1124) and the first retractable rod (1123) are arranged in parallel and at intervals along the first direction.

5. The foldable boarding ladder (100) according to claim 4, characterized in that: The connecting rod assembly (112) further comprises a stabilizing rod (1125), the two ends of which are rotatably connected to the middle portion of the first retractable rod (1123) and the middle portion of the second retractable rod (1124), respectively, and the stabilizing rod (1125) is parallel to the telescopic member (111).

6. The foldable boarding ladder (100) according to claim 1, characterized in that: The connecting rod assembly (112) further comprises a second swing rod (1126), the two ends of which are rotatably connected to the telescopic member (111) and the middle part of the first connecting rod (1121), respectively, and the second swing rod (1126), the first swing rod (1122) and the first retractable and deployable rod (1123) are arranged in parallel.

7. The foldable boarding ladder (100) according to claim 1, characterized in that: Also includes: A guide member (140), wherein the guide member (140) is disposed in the storage compartment (210), and the telescopic member (111) cooperates with the guide member (140) to guide along the first direction.

8. An aircraft (200), characterized in that: include: A fuselage defining a storage compartment (210); The foldable boarding ladder (100) according to any one of claims 1 to 7, wherein the foldable boarding ladder (100) is arranged in the storage compartment (210).

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