Awning emergency withdrawing device and boarding bridge

Abstract

The utility model relates to the technical field of boarding bridges, in particular to an awning emergency withdrawing device and a boarding bridge. The awning emergency withdrawing device comprises a pressing block and an ejector rod, the pressing block is used for being installed at the end, away from the awning, of a front arm of the awning opening and closing mechanism, the ejector rod is used for making contact with a swing arm of the awning opening and closing mechanism, the ejector rod is in threaded connection with the pressing block, and the ejector rod can rotate around the axis of the ejector rod and move relative to the pressing block. And the front arm is driven to rotate around a hinged shaft of the front arm and the swing arm in a set direction, and the awning is retracted. When the awning opening and closing mechanism is used, the pressing block can be installed at the end, away from the awning, of the front arm of the awning opening and closing mechanism, the ejector rod makes contact with a swing arm of the awning opening and closing mechanism, and due to the fact that a propeller of the awning opening and closing mechanism cannot work and the swing arm cannot move, the ejector rod is rotated to drive the pressing block to move; therefore, the front arm is driven to rotate around the hinged shaft of the front arm and the swing arm in the set direction, and 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 to fit the outer shell of the aircraft, so as to realize 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 telescopic movement 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 of 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 pressing block and a ejector rod. The pressing block is used to be installed at the end of the front arm of the awning opening and closing mechanism away from the awning. The ejector rod is used to contact the swing arm of the awning opening and closing mechanism. The ejector rod is threadedly connected to the pressing block. The ejector rod can rotate around its own axis and move relative to the pressing block, so as to drive the front arm to rotate around its hinge axis with the swing arm in a set direction and retract the awning.

[0008] In an embodiment of the present application, the pressing block is used to be installed in the receiving groove of the front arm. The pressing block has a contact surface that matches the bottom of the receiving groove, so that the angle between the ejector rod and the front arm can be adjusted. The groove wall of the receiving groove is used to limit the pressing block and the ejector rod to rotate together.

[0009] In an embodiment of the present application, the awning emergency retraction device further includes a bearing seat, which is used to connect to the end of the forearm away from the awning. The bearing seat has a bearing surface and a limiting surface. The pressing block has a contact surface and a limiting mating surface. The contact surface is adapted to the bearing surface so that the angle between the ejector rod and the forearm is adjustable; the limiting mating surface is adapted to the limiting surface to limit the pressing block and the ejector rod from rotating together.

[0010] In an embodiment of the present application, the bearing surface and the contact surface are curved surfaces.

[0011] In an embodiment of the present application, the end face of the ejector rod for contacting the swing arm is a spherical crown curved surface.

[0012] In an embodiment of the present application, the awning emergency retraction device further includes a gasket, which is used to be installed on the swing arm. The gasket is provided with a first guiding groove, and the end of the ejector rod is located in the first guiding groove.

[0013] In an embodiment of the present application, the awning emergency retraction device further includes a driving member, which is connected to the ejector rod to drive the ejector rod to rotate around its own axis.

[0014] In an embodiment of the present application, the driving member is a crank or a ratchet wrench.

[0015] In an embodiment of the present application, the awning emergency retraction device further includes a storage box, and a placement position for placing the ejector rod and the pressing block is arranged inside the storage box.

[0016] Based on the above purpose, the present application further provides a boarding bridge, which includes an awning, an awning opening and closing mechanism and the awning emergency retraction device described above. The awning opening and closing mechanism includes a forearm and a swing arm. One end of the forearm is connected to the awning, the pressing block is installed at the end of the forearm away from the awning, and the swing arm is hinged to the part between the two ends of the forearm.

[0017] The beneficial effects of the present application mainly lie in:

[0018] For the awning emergency retraction device provided by the present application, during use, the pressing block can be installed at the end of the forearm of the awning opening and closing mechanism away from the awning, so that the ejector rod contacts the swing arm of the awning opening and closing mechanism. Since the thruster of the awning opening and closing mechanism cannot work and the swing arm cannot move, at this time, rotate the ejector rod to move relative to the pressing block, thereby driving the forearm to rotate around its hinge axis with the swing arm in a set direction, and further retracting the awning. Description of the Drawings

[0019] 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, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Structural schematic diagram of the awning emergency retraction device provided by the embodiment of the present application;

[0021] Figure 2 Structural schematic diagram of the cooperation between the awning emergency retraction device and the awning opening and closing mechanism provided by the embodiment of the present application;

[0022] Figure 3 For Figure 2 Partial enlarged view of position A in

[0023] Figure 4 Structural schematic diagram of the awning opening and closing mechanism cooperating with the awning emergency retraction device in the embodiment of the present application;

[0024] Figure 5 For Figure 4 Partial enlarged view of position B in

[0025] Figure 6 Structural schematic diagram of one perspective of the bearing seat in the awning emergency retraction device provided by the embodiment of the present application;

[0026] Figure 7 Structural schematic diagram of another perspective of the bearing seat in the awning emergency retraction device provided by the embodiment of the present application;

[0027] Figure 8 Schematic diagram of the state comparison of two positions during the working process of the awning emergency retraction device provided by the embodiment of the present application;

[0028] Figure 9 Schematic diagram of the state when the awning in the boarding bridge provided by the embodiment of the present application is docked with the aircraft;

[0029] Figure 10 Schematic diagram of the state when the awning in the boarding bridge provided by the embodiment of the present application is in the (partially) retracted state.

[0030] The description of the reference numerals is as follows:

[0031] 11 - ejector rod; 12 - pressing block; 121 - contact surface; 1221 - first surface; 1222 - second surface; 13 - driving member; 14 - bearing seat; 141 - mounting portion; 142 - bearing surface; 143 - limiting surface; 1431 - sub - side wall; 15 - gasket; 151 - first guiding groove; 21 - front arm; 211 - upper arm portion; 212 - connecting portion; 213 - lower arm portion; 22 - swing arm; 23 - rear arm; 24 - hinge shaft; 25 - thruster; 31 - front frame; 32 - tarpaulin; 40 - floor. Detailed implementation manner

[0032] The technical solutions of the present application will be clearly and completely described below 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 in 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 thus cannot be understood 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 limited, terms such as "installation", "connection", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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 situations.

[0035] See Figures 1 to 10 As shown, this embodiment provides an emergency retraction device for a awning, including a pressing block 12 and an ejector rod 11. The pressing block 12 is used to be installed at the end of the front arm 21 of the awning opening - closing mechanism away from the awning, and the ejector rod 11 is used to contact the swing arm 22 of the awning opening - closing mechanism. The ejector rod 11 is threadedly connected to the pressing block 12. The ejector rod 11 can rotate around its own axis and can move relative to the pressing block 12 to drive the front arm 21 to rotate around its hinge shaft 24 with the swing arm 22 in a set direction and retract the awning.

[0036] The canopy emergency retraction device provided in this embodiment can be used by installing the pressing block 12 on the end of the forearm 21 of the canopy opening and closing mechanism away from the canopy, so that the top rod 11 contacts the swing arm 22 of the canopy opening and closing mechanism. Since the propeller 25 of the canopy opening and closing mechanism cannot work and the swing arm 22 cannot move, the top rod 11 is rotated to move relative to the pressing block 12, thereby driving the forearm 21 to rotate along the set direction around the hinge shaft 24 between it and the swing arm 22, thereby retracting the canopy. If the boarding bridge can still be withdrawn, the canopy emergency retraction assembly is used to retract the upper end of the canopy from the aircraft fuselage, and the aircraft leaves the aircraft stand after the boarding bridge is withdrawn; if the boarding bridge cannot be withdrawn, the canopy emergency retraction assembly is used to retract the upper end of the canopy from the aircraft fuselage (the retraction amount is greater than the aforementioned case where the bridge can be withdrawn), and then the aircraft leaves the aircraft stand.

[0037] In this embodiment, the pressing block 12 is provided with a threaded hole, and the ejector rod 11 is provided with an external thread.

[0038] In this embodiment, see Figure 9 As shown, the awning includes a front frame 31 and a tarpaulin 32. The front frame 31 can be a flexible frame so that it can better match the outer contour shape of the aircraft hatch. The lower end of the front frame 31 is hinged to the floor 40 of the boarding bridge.

[0039] In one embodiment, see Figure 1 As shown, the awning emergency retracting device further comprises a driving member 13, which is connected to the top rod 11 to drive the top rod 11 to rotate around its own axis.

[0040] In some embodiments, the driving member 13 can be a manual driving member. Exemplarily, the manual driving member 13 can be a crank, such as a straight-line crank, an L-shaped crank, or a Z-shaped crank. The crank is connected to the end of the push rod 11 away from the swing arm 22. The push rod 11 is driven to rotate around its own axis by the hand crank. The manual driving member 13 can also be a ratchet wrench, for example, a ratchet wrench with variable length.

[0041] In other embodiments, the driving member 13 may also be an electric driving member, such as a motor, and the power output shaft of the motor is transmission-connected to the push rod 11 .

[0042] In one embodiment, see Figure 3 , Figure 6 and Figure 7 As shown, the awning emergency withdrawal device also includes a bearing seat 14, which is used to connect to the end of the forearm 21 away from the awning, and the bearing seat 14 has a bearing surface 142 and a limiting surface 143. The pressure block 12 has a contact surface 121 and a limiting matching surface. The contact surface 121 is adapted to the bearing surface 142 so that the angle between the push rod 11 and the forearm 21 is adjustable; the limiting matching surface is adapted to the limiting surface 143 to limit the pressure block 12 from rotating together with the push rod 11.

[0043] Exemplarily, refer to Figure 2 As shown, the forearm 21 includes an integrally formed or fixedly connected upper arm portion 211, a lower arm portion 213, and a connecting portion 212 connecting the upper arm portion 211 and the lower arm portion 213. Among them, the upper arm portion 211 and the lower arm portion 213 are respectively formed by extending from both ends of the connecting portion 212 in opposite directions.

[0044] The bearing seat 14 can be detachably connected to the lower arm portion 213 of the forearm 21 through a fastener. The fastener can be a pin, a bolt, or can also include a bolt and a nut. Exemplarily, refer to Figure 6 As shown, the bearing seat 14 has a mounting portion 141. The mounting portion 141 is provided with a through hole, and the lower arm portion 213 is provided with a threaded hole. The bolt passes through the through hole and is connected to the threaded hole of the lower arm portion 213 to mount the bearing seat 14 on the forearm 21.

[0045] Refer to Figure 7 As shown, an opening is provided on one side of the bearing seat 14. The bearing seat 14 has a receiving cavity. The receiving cavity communicates with the opening. The bottom of the receiving cavity forms a bearing surface 142, and the side wall of the receiving cavity forms a limiting surface 143.

[0046] The contact surface 121 of the pressing block 12 faces the bearing surface 142, and the limiting and mating surface of the pressing block 12 faces the side wall of the receiving cavity. Exemplarily, the pressing block 12 can be formed by cutting a spherical segment structure. Specifically, along a direction parallel to a diameter of the spherical segment structure, the spherical segment structure is cut. The two first surfaces 1221 formed after cutting are symmetrically located on both sides of the diameter. Along a direction parallel to another diameter of the spherical segment structure, the spherical segment structure is cut. The second surface 1222 formed after cutting is symmetrically located on both sides of the other diameter. Among them, the other diameter is perpendicular to the diameter. The second surface 1222 and the first surface 1221 may intersect or may not intersect; the two first surfaces 1221 and one second surface 1222 together form the limiting and mating surface, or the two second surfaces 1222 and one first surface 1221 together form the limiting and mating surface.

[0047] Of course, the limiting and mating surface is not limited to one form. Theoretically, as long as the limiting and mating surface is not a spherical surface.

[0048] In this embodiment, both the bearing surface 142 and the contact surface 121 are curved surfaces. Exemplarily, the bearing surface 142 and the contact surface 121 are spherical crown curved surfaces that cooperate with each other. Among them, the bearing surface 142 is provided with a through hole for the ejector rod 11 to pass through; the threaded hole on the pressing block 12 penetrates the contact surface 121. Refer to Figure 8 As shown, when the pressing block 12 moves relative to the ejector rod 11 and drives the forearm 21 to rotate counterclockwise around the hinge axis 24, that is to say, the forearm 21 moves fromFigure 8 When the solid line position of the [description is missing, assumed to be a certain component] moves to the dashed line position, the lower arm portion 213 will swing away from the swing arm 22 and will deflect relative to the ejector rod 11. Since the contact surface 121 is adapted to the bearing surface 142, the angle between the ejector rod 11 and the lower arm portion 213 of the front arm 21 is adjustable. That is, the pressing block 12 can drive the ejector rod 11 to adaptively adjust its position relative to the lower arm portion 213, preventing jamming between the ejector rod 11 and the lower arm portion 213, and thus ensuring a smoother process of retracting the awning.

[0049] See Figure 7 As shown, the side wall of the receiving cavity includes three sub-side walls 1431, and the three sub-side walls 1431 can cooperate with the limiting mating surface to prevent the pressing block 12 and the ejector rod 11 from rotating together, and thus realize the movement of the pressing block 12 along the axis of the ejector rod 11. Among them, the axis of the ejector rod 11 changes with the position of the ejector rod 11.

[0050] It should be understood that there is a certain gap between the limiting surface 143 and the limiting mating surface, which can reserve a certain space for the pressing block 12 to ensure that the pressing block 12 can rotate relative to the bearing surface 142 of the bearing seat 14, so as to realize the adaptive adjustment of the position of the ejector rod 11.

[0051] In other embodiments, in combination with Figure 1 , Figure 4 and Figure 5 As shown, the pressing block 12 can also be directly installed in the receiving groove of the front arm 21. The pressing block 12 has a contact surface 121 that cooperates with the bottom of the receiving groove, and the contact surface 121 and the bottom of the receiving groove can also be mutually cooperating spherical crown curved surfaces, so that the angle between the ejector rod 11 and the front arm 21 is adjustable; the groove wall of the receiving groove is used to limit the rotation of the pressing block 12 and the ejector rod 11 together, so as to ensure that the pressing block 12 can move along the axis of the ejector rod 11 to drive the front arm 21 to rotate around its hinge axis 24 with the swing arm 22 in a set direction and retract the awning.

[0052] In one embodiment, see Figure 1 As shown, the end face of the end of the ejector rod 11 that abuts against the swing arm 22 is a spherical crown curved surface. This can ensure that the ejector rod 11 can be flexibly adjusted during the movement process, and at the same time, it also ensures that a surface-to-surface contact is formed between the end of the ejector rod 11 and the swing arm 22, reducing the wear between the ejector rod 11 and the swing arm 22.

[0053] In one embodiment, see Figure 5As shown, the awning emergency retraction device further includes a gasket 15, which is used to be installed on the swing arm 22. The gasket 15 is provided with a first guide groove 151, and the end of the top rod 11 is located in the first guide groove 151. By providing the gasket 15, the swing arm 22 can be further prevented from being worn. When the gasket 15 is damaged, the gasket 15 can be directly replaced, which reduces the cost and prolongs the service life of the front arm 21.

[0054] Exemplarily, a portion of the groove wall of the first guide groove 151 can be a spherical cap surface that matches the end of the push rod 11. Along the length direction of the swing arm 22, the size of the first guide groove 151 is larger than the size of the push rod 11. This can reserve a certain amount of movement space for the push rod 11 to achieve angle adjustment of the push rod 11.

[0055] In one embodiment, the awning emergency retraction device further comprises a storage box (not shown in the figure), and a placement position for placing the push rod 11 and the pressure block 12 is provided inside the storage box.

[0056] In this embodiment, the push rod 11, the pressure block 12, the driving member 13 and the bearing seat 14 (if any) can all be placed in a storage box. A pad with a limiting groove can be provided in the storage box to limit and protect the push rod 11, the pressure block 12, the driving member 13 and the bearing seat 14 to prevent the various parts from colliding and rubbing against each other. Among them, the limiting groove forms a placement position. Exemplarily, the contour shape of the limiting groove for placing the push rod 11 is adapted to the outer contour of the push rod 11 to limit the push rod and reduce the risk of the push rod escaping from the limiting groove. A handle can be provided on the outside of the storage box. Of course, the storage box can also be fixed somewhere on the boarding bridge, such as a corner of the pick-up port.

[0057] When not in use, the push rod 11, the pressure block 12 and the driving member 13 can be disassembled and placed in a storage box, or they can be assembled together and placed in the storage box as a whole. In principle, they should not be installed on the lower arm 213 all the time, so as not to affect the normal opening and closing of the awning opening and closing mechanism. When it is needed, the push rod 11, the pressure block 12 and the driving member 13 can be assembled together first, and then the push rod 11 can be loaded into the accommodating cavity from the opening of the bearing seat 14, and the pressure block 12 can be limited in the accommodating cavity. During the initial installation, a certain distance can be reserved between the end of the push rod 11 and the bottom of the groove, and then the driving member 13 can be used to drive the push rod 11 to rotate, so that the end of the push rod 11 is against the bottom of the groove, and the push rod 11 continues to rotate, relative to the pressure block 12, along the axis of the push rod 11, and then the front arm 21 is driven to rotate around the hinge shaft 24 between it and the swing arm 22, driving the awning to slowly retract.

[0058] This embodiment also provides a boarding bridge, which includes a canopy, a canopy opening and closing mechanism, and the canopy emergency retraction device provided in this embodiment. The canopy opening and closing mechanism includes a front arm 21 and a swing arm 22. One end of the front arm 21 is connected to the canopy, and a pressing block 12 is installed at the end of the front arm 21 away from the canopy. The swing arm 22 is hinged to the part between the two ends of the front arm 21.

[0059] For the boarding bridge provided in this embodiment, since the canopy emergency retraction device provided in this embodiment is used, when the thruster 25 of the canopy opening and closing mechanism has problems and cannot be used, the pressing block 12 can be installed at the end of the front arm 21 of the canopy opening and closing mechanism away from the canopy, so that the ejector rod 11 contacts the swing arm 22 of the canopy opening and closing mechanism. By rotating the ejector rod 11 around its own axis, the movement of the pressing block 12 is driven, thereby driving the front arm 21 to rotate around the hinge axis 24 between it and the swing arm 22 of the canopy opening and closing mechanism in a set direction, and then the canopy is retracted.

[0060] In one embodiment, the front arm 21 is provided with a receiving groove, and the end face of the front arm 21 is provided with an opening, and the opening communicates with the receiving groove; the pressing block 12 is detachably installed in the receiving groove, the contact surface 121 of the pressing block 12 faces the bottom of the receiving groove, and the limiting mating surface of the pressing block 12 faces the groove wall of the receiving groove; the pressing block 12 has a contact surface 121 and a limiting mating surface, the contact surface 121 is adapted to the bottom of the receiving groove, so that the angle between the ejector rod 11 and the front arm 21 is adjustable; the limiting mating surface is adapted to the groove wall of the receiving groove to limit the pressing block 12 from rotating together with the ejector rod 11.

[0061] In this embodiment, the bottom of the receiving groove and the contact surface 121 are spherical crown curved surfaces that cooperate with each other. Among them, a through hole is provided at the bottom of the receiving groove for the ejector rod 11 to pass through. Since the contact surface 121 is adapted to the bottom of the receiving groove, the angle between the ejector rod 11 and the lower arm portion 213 of the front arm 21 is adjustable, that is, the pressing block 12 can drive the ejector rod 11 to adaptively adjust its position relative to the lower arm portion 213, preventing jamming between the ejector rod 11 and the lower arm portion 213, and thus ensuring that the canopy retraction process is smoother.

[0062] The groove wall of the receiving groove includes three sub-groove walls, and the three sub-groove walls can cooperate with the limiting mating surface to prevent the pressing block 12 from rotating together with the ejector rod 11, and thus realize the movement of the pressing block 12 along the axis of the ejector rod 11. Among them, the axis of the ejector rod 11 changes with the position of the ejector rod 11.

[0063] It should be understood that there is a certain gap between the groove wall of the receiving groove and the limiting mating surface, which can reserve a certain space for the pressing block 12 and ensure that the pressing block 12 can rotate relative to the bottom of the receiving groove, so as to realize the adaptive adjustment of the position of the ejector rod 11.

[0064] In one embodiment, the swing arm 22 is provided with a second guiding groove, and one end of the ejector rod 11 in contact with the swing arm 22 is located in the second guiding groove. Exemplarily, a part of the groove wall of the second guiding groove can be a spherical crown curved surface adapted to the end of the ejector rod 11. Along the length direction of the swing arm 22, the size of the second guiding groove is larger than that of the ejector rod 11, so as to reserve a certain movement space for the ejector rod 11 and realize the angle adjustment of the ejector rod 11. Exemplarily, the shape of the second guiding groove can be the same as that of the first guiding groove.

[0065] It should be understood that when the front arm 21 is provided with a receiving groove, the bearing seat 14 can be omitted; when the swing arm 22 is provided with a second guiding groove, the gasket 15 can be omitted, so as to reduce the number of parts of the awning emergency retraction device and facilitate installation and storage. Correspondingly, when the awning emergency retraction device includes the bearing seat 14, the receiving groove may not be provided on the front arm 21, and when the awning emergency retraction device includes the gasket 15, the second guiding groove may not be provided on the swing arm 22, so as to improve the structural strength of the front arm 21 and the swing arm 22.

[0066] 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. A canopy emergency retraction device, characterized in that: The utility model comprises a pressing block and a push rod, wherein the pressing block is used to be installed at the end of the forearm of the awning opening and closing mechanism away from the awning, and the push rod is used to contact the swing arm of the awning opening and closing mechanism, and the push rod is threadedly connected with the pressing block, and the push rod can rotate around its own axis and move relative to the pressing block to drive the forearm to rotate along the set direction around the hinge axis between the forearm and the swing arm, and retract the awning.

2. The awning emergency retraction device according to claim 1, characterized in that: The pressing block is used to be installed in the receiving groove of the forearm. The pressing block has a contact surface that matches the bottom of the receiving groove so that the angle between the push rod and the forearm can be adjusted; the groove wall of the receiving groove is used to limit the pressing block from rotating together with the push rod.

3. The awning emergency retraction device according to claim 1, characterized in that: It also includes a bearing seat, which is used to connect with the end of the forearm away from the canopy. The bearing seat has a bearing surface and a limiting surface. The pressure block has a contact surface and a limiting matching surface. The contact surface is matched with the bearing surface so that the angle between the push rod and the forearm can be adjusted; the limiting matching surface is matched with the limiting surface to limit the pressure block from rotating together with the push rod.

4. The awning emergency retraction device according to claim 3, characterized in that: The bearing surface and the contact surface are curved surfaces.

5. The awning emergency retraction device according to claim 1, characterized in that: The end surface of one end of the push rod for contacting the swing arm is a spherical cap curved surface.

6. The awning emergency retraction device according to claim 1, characterized in that: It also includes a gasket, which is used to be installed on the swing arm. The gasket is provided with a first guide groove, and the end of the push rod is located in the first guide groove.

7. The awning emergency retraction device according to any one of claims 1 to 6, characterized in that: The invention also comprises a driving member, which is connected with the push rod to drive the push rod to rotate around its own axis.

8. The awning emergency retraction device according to claim 7, characterized in that: The driving member is a crank or a ratchet wrench.

9. The awning emergency retraction device according to any one of claims 1 to 6, characterized in that: It also includes a storage box, wherein a placement position for placing the push rod and the pressing block is arranged inside the storage box.

10. A boarding bridge, characterized in that: The invention 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 forearm and a swing arm, one end of the forearm is connected to the awning, the pressing block is installed at the end of the forearm away from the awning, and the swing arm is hinged to the part between the two ends of the forearm.

Images