Emergency awning retracting device and boarding bridge

Abstract

The utility model relates to the technical field of boarding bridges, in particular to an awning emergency retracting device and a boarding bridge. The emergency awning retracting device comprises a first bearing seat, a second bearing seat and a reciprocating driving mechanism, the first bearing seat is used for being installed on a front arm of an awning opening and closing mechanism, the second bearing seat is used for being installed on a rear arm of the awning opening and closing mechanism, and one end of the reciprocating driving mechanism is movably installed on the first bearing seat; the other end of the reciprocating driving mechanism is movably installed on the second bearing seat, and the reciprocating driving mechanism can drive the front arm to rotate around a hinge shaft of the front arm and the rear arm in the set direction so that the awning can be retracted. Wherein the articulated shaft between the front arm and the rear arm is named as a first articulated shaft. When the propeller of the awning opening and closing mechanism goes wrong, the reciprocating driving mechanism can drive the front arm to rotate around the first hinge shaft of the front arm and the rear arm in the set direction, and therefore the awning is retracted.

Description

Technical Field

[0001] The present application relates to the technical field of boarding bridges, and particularly to an awning emergency retraction device and a boarding bridge. Background Art

[0002] In the related art, an awning is provided on the boarding bridge, and the awning is extended and retracted through an awning opening and closing mechanism. After the boarding bridge approaches the aircraft, the awning is unfolded and attached to the outer shell of the aircraft to achieve the docking between the boarding bridge and the aircraft.

[0003] CN106828965B discloses an opening and closing mechanism for an awning, an awning device and a boarding bridge. The awning opening and closing mechanism mainly includes components such as a thruster (cylinder or oil cylinder), a swing arm, a front arm and a rear arm. Through the expansion and contraction of the thruster, the linkage of components such as the swing arm is driven, so as to realize the conversion of the awning opening and closing mechanism between the extended state and the retracted state.

[0004] For example, when the awning opening and closing mechanism is converted from the fully extended state to the fully retracted state, the thruster starts to extend. The thruster pushes the swing arm to rotate around the hinge axis between the swing arm and the rear arm in the first direction (for example, clockwise). The front arm can rotate around the aforementioned hinge axis in the first direction under the push of the swing arm. Since the awning is hinged to the front arm, the awning also starts to rotate around the hinge axis between the awning and the floor in the first direction under the drive of the front arm, thereby driving the awning to retract.

[0005] However, when the thruster has a problem, it cannot drive the swing arm to move, resulting in the swing arm being unable to drive the front arm to move, and further unable to drive the awning to retract. At this time, the takeoff of the aircraft will be affected. Utility Model Content

[0006] The purpose of the present application is to provide an awning emergency retraction device and a boarding bridge to ensure that the awning can be normally retracted when the thruster has a problem.

[0007] Based on the above purpose, the present application provides an awning emergency retraction device, including a first bearing seat, a second bearing seat and a reciprocating drive mechanism. The first bearing seat is used to be installed on the front arm of the awning opening and closing mechanism, the second bearing seat is used to be installed on the rear arm of the awning opening and closing mechanism. One end of the reciprocating drive mechanism is movably installed on the first bearing seat, and the other end of the reciprocating drive mechanism is movably installed on the second bearing seat. The reciprocating drive mechanism can drive the front arm to rotate around its hinge axis with the rear arm in a set direction to retract the awning.

[0008] In an embodiment of the present application, the reciprocating drive mechanism includes a first rod portion and a second rod portion. One end of the first rod portion is provided with a first protrusion, and one end of the second rod portion is provided with a second protrusion. The other end of the first rod portion is threadedly connected to the other end of the second rod portion. The second rod portion can move relative to the first rod portion to drive the forearm to rotate in a set direction around its hinge axis with the rear arm and retract the awning.

[0009] In an embodiment of the present application, the first bearing seat has a first receiving groove, and the second bearing seat is provided with a second receiving groove. The opening of the second receiving groove faces away from the opening of the first receiving groove.

[0010] The first protrusion is movably installed in the first receiving groove, and the first protrusion can rotate relative to the first bearing seat.

[0011] The second protrusion has a contact surface that cooperates with the bottom of the second receiving groove, so that the angle between the second rod portion and the rear arm is adjustable. The groove wall of the second receiving groove is used to limit the second rod portion from rotating around its own axis.

[0012] In an embodiment of the present application, the surface of the first protrusion is a spherical crown curved surface, and the inner wall of the first receiving groove is adapted to the spherical crown curved surface.

[0013] In an embodiment of the present application, both the bottom of the second receiving groove and the contact surface are curved surfaces.

[0014] In an embodiment of the present application, one of the first rod portion and the second rod portion is provided with a threaded hole, and the other is provided with an external thread.

[0015] In an embodiment of the present application, the reciprocating drive mechanism includes a telescopic device. One end of the telescopic device is hinged to the first bearing seat, and the other end of the telescopic device is hinged to the second bearing seat.

[0016] In an embodiment of the present application, the telescopic device is a cylinder, an electric cylinder or a hydraulic cylinder. One of the cylinder body and the piston rod of the telescopic device is hinged to the first bearing seat, and the other is hinged to the second bearing seat.

[0017] In an embodiment of the present application, the awning emergency retraction device further includes a storage box. The storage box includes a box body, and a placement groove for placing the first bearing seat, the second bearing seat and the reciprocating drive mechanism is provided in the box body.

[0018] For the above purposes, the present application further provides a boarding bridge, which includes a canopy, a canopy opening and closing mechanism, and the canopy emergency retraction device. The canopy opening and closing mechanism includes a front arm and a rear arm. The first end of the front arm is connected to the canopy. The front arm and the rear arm are hinged by a hinge shaft. The first bearing seat is installed on the front arm, and the first bearing seat is located on one side of the hinge shaft close to the first end of the front arm; the second bearing seat is installed on the rear arm.

[0019] The beneficial effects of the present application mainly lie in:

[0020] When the canopy emergency retraction device provided by the present application is in use, the first bearing seat is installed on the front arm of the canopy opening and closing mechanism, and the second bearing seat is installed on the rear arm of the canopy opening and closing mechanism. When there is a problem with the thruster of the canopy opening and closing mechanism, the rear arm cannot move, and the position of the hinge shaft between the rear arm and the front arm is also fixed. Since one end of the reciprocating drive mechanism is movably installed on the first bearing seat and the other end of the reciprocating drive mechanism is movably installed on the second bearing seat, when the reciprocating drive mechanism moves, it can drive the front arm to rotate around its first hinge shaft with the rear arm in a set direction, so as to retract the canopy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the canopy emergency retraction device provided by the embodiment of the present application;

[0023] Figure 2 It is a schematic structural diagram of the second bearing seat in the canopy emergency retraction device provided by the embodiment of the present application from one perspective;

[0024] Figure 3 It is a schematic structural diagram of the second bearing seat in the canopy emergency retraction device provided by the embodiment of the present application from another perspective;

[0025] Figure 4 It is a schematic structural diagram of the first rod portion in the canopy emergency retraction device provided by the embodiment of the present application;

[0026] Figure 5 It is a schematic structural diagram of the second rod portion in the canopy emergency retraction device provided by the embodiment of the present application;

[0027] Figure 6Schematic structural diagram of the awning emergency retraction device provided by an embodiment of the present application, installed on an awning opening and closing mechanism;

[0028] Figure 7 Schematic comparison diagram of the states of two positions during the working process of the awning emergency retraction device provided by an embodiment of the present application;

[0029] Figure 8 Another schematic structural diagram of the awning emergency retraction device provided by an embodiment of the present application.

[0030] Explanation of reference numerals is as follows:

[0031] 10, 10’ - First bearing seat; 20, 20’ - Second bearing seat; 21 - Second receiving groove; 211 - Bottom of the groove; 212 - Wall of the groove; 30 - First rod portion; 31 - First protruding portion; 40 - Second rod portion; 41 - Second protruding portion; 411 - Contact surface; 412 - Limit mating surface; 50 - Forearm; 51 - Upper arm portion; 52 - Connecting portion; 53 - Lower arm portion; 60 - Rear arm; 70 - Thruster; 81 - Front frame; 82 - Tarpaulin; 90 - Floor; 101 - First hinge shaft; 102 - Second hinge shaft; 200 - Telescopic device. Detailed implementation manners

[0032] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0033] In the description of the present application, it should be noted that terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, terms such as "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] See Figures 1 to 8 As shown, this embodiment provides an awning emergency retraction device, which includes a first carrier seat 10, a second carrier seat 20, and a reciprocating drive mechanism. The first carrier seat 10 is used for installation on the front arm 50 of the awning opening and closing mechanism, the second carrier seat 20 is used for installation on the rear arm 60 of the awning opening and closing mechanism, one end of the reciprocating drive mechanism is movably installed on the first carrier seat 10, the other end of the reciprocating drive mechanism is movably installed on the second carrier seat 20, and the reciprocating drive mechanism can drive the front arm 50 to rotate around its hinge axis with the rear arm 60 in a set direction to retract the awning. Among them, the hinge axis between the front arm 50 and the rear arm 60 is named the first hinge axis 101.

[0036] For the awning emergency retraction device provided in this embodiment, during use, the first carrier seat 10 is installed on the front arm 50 of the awning opening and closing mechanism, and the second carrier seat 20 is installed on the rear arm 60 of the awning opening and closing mechanism. When there is a problem with the thruster 70 of the awning opening and closing mechanism, the rear arm 60 cannot move, and the position of the hinge axis between the rear arm 60 and the front arm 50 is also fixed. Since one end of the reciprocating drive mechanism is movably installed on the first carrier seat 10 and the other end of the reciprocating drive mechanism is movably installed on the second carrier seat 20, when the reciprocating drive mechanism moves, it can drive the front arm 50 to rotate around its first hinge axis 101 with the rear arm 60 in a set direction, so as to retract the awning. If the boarding bridge can still be withdrawn, the upper retracted part of the awning is separated from the aircraft fuselage through the awning emergency retraction assembly, and the aircraft leaves the stand after the boarding bridge is withdrawn; if the boarding bridge cannot be withdrawn, the upper end of the awning is retracted and separated from the aircraft fuselage through the awning emergency retraction assembly (the retraction amount is greater than the case where the bridge can be withdrawn), and then the aircraft leaves the stand.

[0037] See Figure 6 As shown, the front arm 50 includes an upper arm portion 51, a lower arm portion 53 that are integrally formed or fixedly connected together, and a connecting portion 52 connecting the upper arm portion 51 and the lower arm portion 53. Among them, the upper arm portion 51 and the lower arm portion 53 are respectively formed by extending from both ends of the connecting portion 52 in opposite directions. The first carrier seat 10 is installed on the connecting portion 52.

[0038] In this embodiment, see Figure 6As shown, the awning includes a front frame 81 and a tarp 82. The front frame 81 can be a flexible frame, so that it can better fit the outer contour shape at the aircraft hatch. The upper end of the front frame 81 is hinged to the upper arm portion 51 of the front arm, and the lower end portion of the front frame 81 is hinged to the floor 90 of the boarding bridge through a second hinge shaft 102. When the reciprocating drive mechanism moves, it can drive the front arm 50 to rotate around its hinge shaft with the rear arm 60 in a set direction, and then drive the front frame 81 to rotate around the second hinge shaft 102 between it and the boarding bridge floor 90, so that the awning is retracted.

[0039] Exemplarily, the front frame 81 rotates around the second hinge shaft 102 in the counterclockwise direction to retract the awning.

[0040] In a possible design, referring to Figure 1 As shown, the reciprocating drive mechanism includes a first rod portion 30 and a second rod portion 40. A first protrusion 31 is provided at one end of the first rod portion 30, and a second protrusion 41 is provided at one end of the second rod portion 40; the other end of the first rod portion 30 is threadedly connected to the other end of the second rod portion 40. The second rod portion 40 can move relative to the first rod portion 30 to drive the front arm 50 to rotate around the first hinge shaft 101 in a set direction and retract the awning.

[0041] In some embodiments, referring to Figure 4 As shown, the first rod portion 30 is provided with a threaded hole, and the second rod portion 40 is provided with an external thread.

[0042] In some other embodiments, the first rod portion 30 is provided with an external thread, and the second rod portion 40 is provided with a threaded hole.

[0043] In some other embodiments, the first rod portion 30 can be a rod with a ball head at one end and provided with an external thread, and the second rod portion 40 can be a square nut with a spherical surface.

[0044] Exemplarily, referring to Figure 7 As shown, when the awning needs to be retracted, rotate the first rod portion 30 so that the first rod portion 30 moves along its own axis and the overall length of the first rod portion 30 and the second rod portion 40 is shortened, thereby driving the front arm 50 to rotate around the hinge shaft, and then slowly retracting the awning. Among them, the axis of the first rod portion 30 and the axis of the second rod portion 40 are basically coincident, and the axis of the first rod portion 30 changes with the position change of the first rod portion 30.

[0045] In one embodiment, the awning emergency retraction device further includes a driving member (not shown in the figure), and the driving member is connected to the first rod portion 30 to drive the first rod portion 30 to rotate around its own axis.

[0046] In some embodiments, the driving member can be a manual driving member. Exemplarily, the manual driving member can be a crank, such as a straight crank, an L-shaped crank or a Z-shaped crank. By rotating the crank by hand, the first rod portion 30 is driven to rotate about its own axis; the manual driving member can also be a ratchet wrench, for example, a ratchet wrench with variable length.

[0047] In some other embodiments, the driving member can also be an electric driving member, such as a motor, and the power output shaft of the motor is in transmission connection with the first rod portion 30.

[0048] Exemplarily, taking the driving member as a crank as an example, during installation, a hole can be opened at one end of the first protrusion 31 away from the first rod portion 30, and then the crank is installed in the hole. The sleeve can also be installed at one end of the first protrusion away from the first rod portion, and the crank is installed in the sleeve.

[0049] In this possible design, the first bearing seat 10 has a first receiving groove, and a through hole is provided at the bottom of the first receiving groove for the first rod portion 30 to pass through; an opening is provided on one side of the first bearing seat 10, and the opening communicates with the first receiving groove. The size of the opening can be adapted to the diameter of the first rod portion 30, which is convenient for installing the first rod portion 30 into the first receiving groove, and then moving the first rod portion 30 so that the first protrusion 31 is located in the first receiving groove. The surface of the first protrusion 31 can be a spherical crown curved surface, and the inner wall of the first receiving groove is adapted to the spherical crown curved surface. Exemplarily, the first protrusion 31 can be a sphere. The first protrusion 31 can rotate relative to the first bearing seat 10 about its spherical center.

[0050] See Figure 2 and Figure 3 As shown in, the second bearing seat 20 is provided with a second receiving groove 21, and the notch of the second receiving groove 21 faces away from the notch of the first receiving groove, ensuring that the first rod portion 30 can move in the direction close to the second rod portion 40; the second protrusion 41 has a contact surface 411 that cooperates with the bottom 211 of the second receiving groove 21, so that the angle between the second rod portion 40 and the rear arm 60 is adjustable, and the groove wall 212 of the second receiving groove 21 is used to limit the rotation of the second rod portion 40 about its own axis.

[0051] In some embodiments, both the bottom 211 of the second receiving groove 21 and the contact surface 411 are curved surfaces. Exemplarily, both the bottom 211 of the second receiving groove 21 and the contact surface 411 are spherical crown curved surfaces that cooperate with each other.

[0052] The second protrusion 41 can be formed by cutting a spherical structure, and the formed surface can be used as a limiting mating surface 412 that cooperates with the groove wall 212 of the second receiving groove 21 to prevent the second protrusion 41 from rotating relative to the second bearing seat 20 about the axis of the second rod portion 40.

[0053] It should be understood that the limiting mating surface 412 can be a plane or a curved surface. In theory, as long as the limiting mating surface 412 is not a spherical surface.

[0054] See Figure 7 As shown, when the first rod portion 30 moves relative to the second rod portion 40 and drives the forearm 50 to rotate counterclockwise around the first hinge axis 101, that is, when the forearm 50 moves from the solid line position of Figure 7 to the dashed line position, the angle between the connecting portion 52 and the first rod portion 30 will change. Since the inner wall of the first receiving groove is adapted to the spherical crown curved surface of the first protrusion 31, the angle between the first rod portion 30 and the connecting portion 52 is adjustable, that is, the first rod portion 30 can be adaptively adjusted relative to the position of the connecting portion 52 to prevent jamming between the first rod portion 30 and the connecting portion 52. At the same time, the angle between the second rod portion 40 and the rear arm 60 will also change. Since the contact surface 411 is adapted to the bottom 211 of the second receiving groove 21, the angle between the second rod portion 40 and the rear arm 60 is adjustable, that is, the second rod portion 40 can be adaptively adjusted relative to the position of the rear arm 60 to prevent jamming between the second rod portion 40 and the rear arm 60.

[0055] In summary, the awning emergency retraction device provided in this embodiment can ensure that the awning retraction process is smoother.

[0056] It should be understood that there is a certain gap between the limiting mating surface 412 and the groove wall 212 of the second receiving groove 21, which can reserve a certain space for the second protrusion 41 to ensure that the second protrusion 41 can rotate relative to the second carrier 20, thereby realizing the adaptive adjustment of the position of the second rod portion 40.

[0057] In another possible design, see Figure 8 As shown, the reciprocating drive mechanism includes a telescopic device 200. One end of the telescopic device 200 is hinged to the first carrier 10', and the other end of the telescopic device 200 is hinged to the second carrier 20'.

[0058] Exemplarily, both the first carrier 10' and the second carrier 20' are provided with mounting holes, and hinge shafts are installed in the mounting holes.

[0059] In this another possible design, the telescopic device 200 is a cylinder, an electric cylinder or a hydraulic cylinder. One of the cylinder body and the piston rod of the telescopic device 200 is hinged to the first carrier 10', and the other is hinged to the second carrier 20'.

[0060] Exemplarily, the telescopic device 200 is an electric cylinder. The cylinder body of the electric cylinder is hinged to the first bearing seat 10', and the piston rod of the electric cylinder is hinged to the second bearing seat 20'. The piston rod of the electric cylinder shortens to drive the front arm 50 to rotate around its hinge axis with the rear arm 60 in a set direction, so as to retract the awning.

[0061] In one embodiment, the awning emergency retraction device further includes a storage box (not shown in the figure). The storage box includes a box body, and a placement groove for placing the first bearing seat 10, the second bearing seat 20, and the reciprocating drive mechanism is provided in the box body.

[0062] Exemplarily, a gasket with a placement groove can be provided in the box body to limit and protect the first bearing seat 10, the second bearing seat 20, and the reciprocating drive mechanism, and prevent the parts from colliding and rubbing against each other. A handle can be provided outside the box body. Of course, the storage box can also be fixed at a certain place on the boarding bridge, such as the corner of the arrival gate.

[0063] Taking the reciprocating drive mechanism including the first rod portion 30 and the second rod portion 40 as an example, when not in use daily, the first rod portion 30, the second rod portion 40, the first bearing seat 10, and the second bearing seat 20 can be disassembled and placed in the storage box. Of course, they can also be kept assembled together and placed in the storage box as a whole; in principle, they should not be always installed on the awning opening and closing mechanism to avoid affecting the normal opening and closing of the awning opening and closing mechanism. When in need of use, the first rod portion 30 and the second rod portion 40 can be assembled together first, the second protruding portion 41 is inserted into the second receiving groove 21, and then the first rod portion 30 is rotated according to the actual distance to adjust the overall length of the first rod portion 30 and the second rod portion 40, so that the first protruding portion 31 can be inserted into the first receiving groove, and then the first rod portion 30 is rotated again to make the first rod portion 30 and the second rod portion 40 approach each other relatively, thereby driving the front arm 50 to rotate around its hinge axis with the rear arm 60 in a set direction, and further driving the awning to slowly retract.

[0064] This embodiment also provides a boarding bridge, which includes an awning, an awning opening and closing mechanism, and the awning emergency retraction device provided in this embodiment. The awning opening and closing mechanism includes a front arm 50 and a rear arm 60. The first end of the front arm 50 is connected to the awning. The front arm 50 is hinged to the rear arm 60 through a hinge axis. The first bearing seat 10 is installed on the front arm 50, and the first bearing seat 10 is located on one side of the hinge axis close to the first end of the front arm 50; the second bearing seat 20 is installed on the rear arm 60.

[0065] For the boarding bridge provided in this embodiment, since the awning emergency retraction device provided in this embodiment is used, when the thruster 70 of the awning opening and closing mechanism fails and cannot be used, the first carrier 10 can be installed on the front arm 50 of the awning opening and closing mechanism, and the second carrier 20 can be installed on the rear arm 60 of the awning opening and closing mechanism. When the reciprocating drive mechanism moves, it can drive the front arm 50 to rotate around its hinge axis with the rear arm 60 in a set direction, so that the awning is retracted.

[0066] Exemplarily, the first carrier 10 is detachably installed on the front arm 50, and the second carrier 20 is detachably installed on the rear arm 60.

[0067] It should be understood that when the reciprocating drive mechanism includes a telescopic device, the first carrier 10' and the second carrier 20' can be plate-like structures with mounting holes. At this time, the first carrier and the second carrier can also be welded to the corresponding positions of the front arm 50 and the rear arm 60 respectively, as long as the normal operation of the awning opening and closing mechanism is not affected.

[0068] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An emergency awning retracting device, characterized in that: It includes a first bearing seat, a second bearing seat and a reciprocating drive mechanism, the first bearing seat is used to be installed on the front arm of the awning opening and closing mechanism, the second bearing seat is used to be installed on the rear arm of the awning opening and closing mechanism, one end of the reciprocating drive mechanism is movably installed on the first bearing seat, and the other end of the reciprocating drive mechanism is movably installed on the second bearing seat, and the reciprocating drive mechanism can drive the forearm to rotate along a set direction around the hinge axis between it and the rear arm to retract the awning.

2. The awning emergency retracting device according to claim 1, characterized in that: The reciprocating drive mechanism includes a first rod portion and a second rod portion, one end of the first rod portion is movably mounted on a first bearing seat, and one end of the second rod portion is movably mounted on a second bearing seat; the other end of the first rod portion is threadedly connected to the other end of the second rod portion, and the second rod portion can move relative to the first rod portion to drive the forearm to rotate along a set direction around the hinge axis between it and the rear arm and retract the awning.

3. The awning emergency retracting device according to claim 2, characterized in that: The first bearing seat has a first receiving groove, and the second bearing seat is provided with a second receiving groove, wherein the notch of the second receiving groove is away from the notch of the first receiving groove; A first protrusion is provided at one end of the first rod portion, the first protrusion is movably mounted in the first receiving groove, the first protrusion can rotate relative to the first bearing seat, and the first rod portion can rotate around its own axis; A second protrusion is provided at one end of the second rod portion, and the second protrusion has a contact surface that matches with the bottom of the second accommodating groove so that the angle between the second rod portion and the rear arm can be adjusted. The groove wall of the second accommodating groove is used to limit the rotation of the second rod portion around its own axis.

4. The awning emergency retracting device according to claim 3, characterized in that: The surface of the first protrusion is a spherical crown curved surface, and the inner wall of the first receiving groove is matched with the spherical crown curved surface.

5. The awning emergency retracting device according to claim 3, characterized in that: The bottom of the second containing groove and the contact surface are both curved surfaces.

6. The awning emergency retracting device according to claim 2, characterized in that: One of the first rod portion and the second rod portion is provided with a threaded hole, and the other is provided with an external thread.

7. The awning emergency retracting device according to claim 1, characterized in that: The reciprocating drive mechanism comprises a telescopic device, one end of which is hinged to the first bearing seat, and the other end of which is hinged to the second bearing seat.

8. The awning emergency retracting device according to claim 7, characterized in that: The telescopic device is a pneumatic cylinder, an electric cylinder or a hydraulic cylinder. One of the cylinder body and the piston rod of the telescopic device is hinged to the first bearing seat, and the other is hinged to the second bearing seat.

9. The awning emergency retracting device according to any one of claims 1 to 8, characterized in that: It also includes a storage box, which includes a box body, and a placement groove for placing the first bearing seat, the second bearing seat and the reciprocating drive mechanism is provided in the box body.

10. A boarding bridge, characterized in that: It comprises an awning, an awning opening and closing mechanism and an awning emergency retraction device according to any one of claims 1 to 9, wherein the awning opening and closing mechanism comprises a front arm and a rear arm, the first end of the front arm is connected to the awning, the front arm and the rear arm are hinged via a hinge shaft, the first bearing seat is mounted on the front arm, the first bearing seat is located on a side of the hinge shaft close to the first end of the front arm; the second bearing seat is mounted on the rear arm.

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