Gangway door retraction device

Abstract

The present application relates to a kind of gangway door retraction device, belong to gangway door technical field, it includes gangway door lock, buffer mechanism and unlocking mechanism, wherein, gangway door lock includes lock seat assembly, lock box assembly and prompt component, lock seat assembly includes lock seat and lock pin, lock box assembly includes lock box and lock hook, prompt component includes microswitch, double-end swing arm piece and elastic piece.The present application is by being set up prompt component to make operator can accurately understand whether gangway door has been unlocked when carrying out lower operation and accurately understand whether gangway door has been completely retracted when carrying out retraction operation, to be able to prevent operator to exert force when gangway door is still in the state of not unlocking or not completely unlocking, simultaneously can prevent gangway door to appear retraction not in position condition, to make operator can better carry out the retraction operation of gangway door.

Description

Technical Field

[0001] This invention relates to a gangway door retraction device, belonging to the field of gangway door technology. Background Technology

[0002] Currently, aircraft commonly use gangways for passengers to board and disembark. When in use, the gangway is opened and lowered to rest against the ground; when not in use, it is closed and retracted into the cabin. Therefore, a gangway retraction mechanism is needed to achieve the opening and closing of the gangway.

[0003] When lowering the gangway door, it is necessary to first unlock the gangway door and then apply force to lower it. However, with the existing gangway door retraction device, it is difficult for the operator to accurately know whether the gangway door has been unlocked, which means that the gangway door may still be locked or not fully unlocked when the operator applies force. In addition, when retracting the gangway door, it is also difficult for the operator to accurately know whether the gangway door has been fully retracted, which can easily lead to incomplete retraction.

[0004] Therefore, in order to better perform the opening and closing operations of the gangway doors, a new and optimized gangway door opening and closing device is needed. Summary of the Invention

[0005] The purpose of this invention is to provide a gangway door retraction device that can better perform gangway door retraction operations.

[0006] This invention provides a gangway door retraction device, characterized by the following features:

[0007] The gangway door lock is installed on the gangway door and its frame and is used to lock or unlock the gangway door.

[0008] A buffer mechanism is used to output resistance in the opposite direction of rotation during the opening of the gangway door and to output assistance in the same direction of rotation during its closing; and

[0009] The unlocking mechanism, located on the gangway door, is used to unlock the gangway door lock.

[0010] The gangway door locks include:

[0011] A lock seat assembly is provided on the door frame of the gangway door, including a lock seat and a locking pin fixedly provided on the lock seat;

[0012] A lock box assembly, mounted on the gangway door, includes a lock box and a lock hook rotatably disposed within the lock box. The lock hook has a long latch and a short latch, with a lock groove formed between the long latch and the short latch; and

[0013] A notification component, mounted on the lock seat assembly, is used to indicate whether the gangway door lock is in a locked or unlocked state, thereby indicating that the gangway door is locked or unlocked, including:

[0014] A micro switch is mounted on the lock base;

[0015] The double-headed swing arm is rotatably mounted on the lock seat and can rotate between the first trigger position and the second trigger position.

[0016] When the double-headed swing arm is in the first triggered position, the first swing end of the double-headed swing arm presses the contact of the micro switch to close it; when the double-headed swing arm is in the second triggered position, the first swing end of the double-headed swing arm disengages from the contact of the micro switch to open it.

[0017] An elastic element, mounted on the lock seat, is used to give the double-headed swing arm a tendency to rotate toward the first trigger position.

[0018] During the closing process of the gangway door, the locking pin and the long locking tongue collide to make the locking hook rotate in the locking direction. During this process, the locking pin gradually engages with the locking groove. At the same time, the short locking tongue engages with the second swing end of the double-headed swing arm and drives the double-headed swing arm to rotate gradually from the first trigger position to the second trigger position.

[0019] As the gangway door gradually opens from the closed state, the locking hook rotates in the unlocking direction under the action of external force. During this process, the locking pin gradually disengages from the locking groove, and at the same time, the short locking tongue disengages from the second swing end of the double-headed swing arm. Under the action of the elastic element, the double-headed swing arm gradually rotates from the second trigger position to the first trigger position.

[0020] The gangway door retraction device provided by the present invention may also have the following features:

[0021] The double-headed swing arm is a rod, with its middle section forming a rotational support with the lock seat.

[0022] The first swing end of the double-headed swing arm is equipped with a trigger part, which is used to press the contact of the micro switch.

[0023] The second swing end of the double-headed swing arm is provided with a drive engagement part, which is used to engage with the short locking tongue drive.

[0024] The gangway door retraction device provided by the present invention may also have the following features:

[0025] The short locking tongue is provided with a driving structure for driving engagement with the driving mating part, and includes an adjacent guide part and a driving part.

[0026] The guide section is used to guide the drive mating section to engage with the drive section, and the drive section is used to engage with the drive mating section.

[0027] Both the drive section and the drive mating section have convex arc surfaces, while the guide section has an inclined surface.

[0028] When the locking hook rotates in the locking direction, the drive engagement part first abuts against the guide part, and then, under the action of the guide part, abuts against the drive engagement part, thereby driving the double-headed swing arm to rotate from the first trigger position to the second trigger position.

[0029] The gangway door retraction device provided by the present invention may also have the following features:

[0030] Specifically, the longer bolt extending towards the pin is greater than the shorter bolt extending towards the pin.

[0031] The drive structure is located on the side wall of the short latch facing away from the long latch, and the guide part is connected to the extension end of the short latch.

[0032] During the closing process of the gangway door, the locking pin engages with the side wall of the long latch facing the short latch, causing the locking hook to rotate in the locking direction.

[0033] The gangway door retraction device provided by the present invention may also have the following features:

[0034] The buffer mechanism includes a first buffer component and a second buffer component.

[0035] One of the two is located on one side of the gangway door in the width direction, and the other is located on the other side of the gangway door in the width direction;

[0036] The first buffer component includes:

[0037] The first moving part can move in the first direction or in the opposite direction of the first direction;

[0038] The first pull rope component has one end connected to the first moving component via a drive connection, and the other end connected to the door frame of the gangway door.

[0039] A buffer is provided to output resistance when the first moving member moves in a first direction, so as to control the speed at which the first moving member moves in that direction, thereby controlling the speed at which the gangway door opens; and

[0040] The first elastic reset element is at least used to drive the first moving element to move back to its original position in the opposite direction of the first direction.

[0041] The second buffer component includes:

[0042] The second moving part can move in the first direction or in the opposite direction of the first direction;

[0043] The second pull rope is connected at one end to the second moving part and at the other end to the door frame of the gangway door.

[0044] An elastic element is used to output resistance when the second moving member moves in a first direction and to output assistance when the second moving member moves in the opposite direction to the first direction; and

[0045] The second elastic reset element is at least used to drive the second moving element to move back to its original position in the opposite direction of the first direction.

[0046] During the opening of the gangway door, the first and second moving parts move along the first direction;

[0047] During the closing process of the gangway door, the first and second moving parts move back to their original positions in the opposite direction of the first direction.

[0048] The gangway door retraction device provided by the present invention may also have the following features:

[0049] The buffer is a hydraulic buffer that extends along the moving direction of the first moving member. Its movable end is connected to the first moving member, and its fixed end is connected to the gangway door.

[0050] The gangway door retraction device provided by the present invention may also have the following features:

[0051] The elastic element is used to output resistance after the second moving element moves a certain distance in the first direction, at which point the gangway door opens to a certain angle.

[0052] The elastic element is a pneumatic strut that extends along the moving direction of the second moving element, which has a movable connecting part.

[0053] The movable end of the elastic element is connected to the movable connecting part, so that after the second moving element moves a certain distance in the first direction, it forms an abutting fit with the movable end of the elastic element.

[0054] The fixed end of the elastic element is connected to the gangway door.

[0055] The gangway door retraction device provided by the present invention may also have the following features:

[0056] The movable connecting part is a waist-shaped groove that extends along the moving direction of the second moving part.

[0057] The movable end of the elastic element has a sliding rod that slides in conjunction with the waist-shaped groove.

[0058] When the second moving member moves along the first direction to abut against the side wall in the extension direction of the movable connection, the elastic member begins to output resistance.

[0059] The gangway door retraction device provided by the present invention may also have the following features:

[0060] The first elastic reset member is also used to assist in outputting resistance when the first moving member moves along the first direction and to assist in outputting assistance when the first moving member moves in the opposite direction of the first direction.

[0061] The first elastic reset member includes two pneumatic struts that extend along the moving direction of the first moving member and are located on opposite sides of the buffer member.

[0062] The movable end of the pneumatic strut is connected to the first moving part, and the fixed end is connected to the gangway door.

[0063] The gangway door retraction device provided by the present invention may also have the following features:

[0064] The second elastic reset member is also used to assist in outputting resistance when the second moving member moves along the first direction and to assist in outputting assistance when the second moving member moves in the opposite direction of the first direction.

[0065] The second elastic element includes two tension springs, one end of which is connected to the second movable element and the other end of which is connected to the gangway door.

[0066] Therefore, the present invention has the following advantages compared with the prior art:

[0067] According to the gangway door retraction device involved in this embodiment, the gangway door retraction device includes a gangway door lock, a buffer mechanism, and an unlocking mechanism. The gangway door lock includes a lock seat assembly, a lock box assembly, and a warning assembly. The lock seat assembly includes a lock seat and a lock pin; the lock box assembly includes a lock box and a lock hook; the lock hook has a long lock tongue and a short lock tongue, and a lock groove is formed between the long and short lock tongues. The warning assembly includes a micro switch, a double-headed swing arm, and an elastic element. When it is necessary to open the gangway door, the operator first unlocks the gangway door lock through the unlocking mechanism, thereby unlocking the gangway door. Specifically, during the process of gradually opening the gangway door from a closed state, the lock hook rotates along the unlocking direction under the action of the unlocking mechanism and external force. During the rotation, the locking pin gradually disengages from the locking groove, and at the same time, the short locking tongue disengages from the second swing end of the double-headed swing arm. Under the action of the elastic element, the double-headed swing arm gradually rotates from the second trigger position to the first trigger position. When the gangway door is opened to a certain angle, the locking pin completely disengages from the locking groove. At the same time, the double-headed swing arm rotates to the first trigger position, which changes the state of the micro switch. This triggers the micro switch to send a signal indicating that the gangway door lock is in the unlocked state, thus indicating that the gangway door has been unlocked. Then, the operator can apply force to the gangway door to make it rotate and open to the ground. During this process, the buffer mechanism can output resistance in the opposite direction of its rotation, thereby slowing down the opening speed of the gangway door.

[0068] When the gangway door needs to be closed, the operator applies force to rotate it and close it. During the closing process, the buffer mechanism provides assistance in the same direction as the rotation, thereby reducing the operating force required to close the door. Simultaneously, the locking hook moves synchronously with the gangway door. During this movement, the long latch on the hook engages with the locking pin on the door frame, causing the hook to rotate in the locking direction. As it rotates, the locking pin gradually engages with the lock groove. At the same time, the short latch engages with the second swing end of the double-headed swing arm, driving the double-headed swing arm to rotate gradually from the first trigger position to the second trigger position. When the gangway door is fully closed, the locking pin and lock groove are fully engaged, locking the gangway door. When the double-headed swing arm rotates to the second trigger position, the state of the micro switch is changed, thereby triggering the micro switch to send a signal indicating that the gangway door lock is in the locked state, thus indicating that the gangway door is locked and fully retracted. This allows the operator to accurately know whether the gangway door is unlocked during the lowering operation and whether it is fully retracted during the retraction operation. This prevents the gangway door from being locked or not fully unlocked when the operator applies force, and also prevents the gangway door from being incompletely retracted, thus allowing the operator to better perform the gangway door raising and lowering operations. Attached Figure Description

[0069] Figure 1 This is a three-dimensional structural schematic diagram of the gangway door retraction device in an embodiment of the present invention;

[0070] Figure 2 This is a three-dimensional structural diagram of the gangway door lock in an embodiment of the present invention;

[0071] Figure 3 This is a schematic diagram of the structure of the double-headed swing arm component in its first trigger position in an embodiment of the present invention;

[0072] Figure 4 This is a schematic diagram of the structure of the double-headed swing arm component in its second trigger position in an embodiment of the present invention;

[0073] Figure 5 This is a three-dimensional structural diagram of the lock seat assembly in an embodiment of the present invention;

[0074] Figure 6 This is a three-dimensional structural diagram of the lock box assembly in an embodiment of the present invention;

[0075] Figure 7 This is a cross-sectional view of the lock seat assembly in an embodiment of the present invention;

[0076] Figure 8 This is a partial structural schematic diagram of the lock box assembly in an embodiment of the present invention;

[0077] Figure 9This is a schematic diagram of the distribution structure of the buffer mechanism in an embodiment of the present invention;

[0078] Figure 10 This is a three-dimensional structural diagram of the first buffer component in an embodiment of the present invention;

[0079] Figure 11 This is a three-dimensional structural diagram of the second buffer component in an embodiment of the present invention;

[0080] Figure 12 This is a cross-sectional view of the buffer component in an embodiment of the present invention;

[0081] Figure 13 This is a partial structural schematic diagram of the second buffer component in an embodiment of the present invention;

[0082] Figure 14 This is a three-dimensional structural diagram of the second box body in an embodiment of the present invention;

[0083] Figure 15 This is a partial structural schematic diagram of the first buffer component in an embodiment of the present invention;

[0084] Figure 16 This is a schematic diagram of the distribution structure of the first roller in an embodiment of the present invention;

[0085] Figure 17 This is a schematic diagram of the distribution structure of the second roller in an embodiment of the present invention;

[0086] Figure 18 This is a schematic diagram of the main structure of the unlocking mechanism in an embodiment of the present invention;

[0087] Figure 19 This is a schematic diagram of the main view structure of the internal unlocking component in an embodiment of the present invention;

[0088] Figure 20 This is a schematic diagram of the main structure of the external unlocking component in an embodiment of the present invention.

[0089] The markings in the attached diagram are described below:

[0090] gangway door retraction device 100a; gangway door lock 10;

[0091] Lock seat assembly 11; Lock seat 111; Mounting part 111a; Locking pin 112; Support shaft 113;

[0092] Lock box assembly 12; lock box 121; lock hook 122; long lock tongue 122a; short lock tongue 122b; drive structure 1221; guide part 1221a; drive part 1221b; lock groove 122c; first reset member 123; stop member 124; second reset member 125;

[0093] Prompt component 13; micro switch 131; double-headed swing arm 132; trigger part 132a; drive engagement part 132b; elastic element 133;

[0094] Buffer mechanism 20;

[0095] First buffer assembly 21; First moving part 211; First pull rope part 212; Buffer part 213; Outer tube 213a; Inner rod 213b; Piston ring 213c; First elastic reset part 214; First box 215; First roller 216; First roller unit 216a;

[0096] Second buffer assembly 22; second moving part 221; movable connecting part 221a; second pull rope part 222; elastic part 223; slide bar part 223a; second elastic reset part 224; second housing 225; mounting hole 225a; second roller 226; second roller unit 226a;

[0097] Unlocking mechanism 30; inner unlocking component 31; outer unlocking component 32; first pull rope 33; second pull rope 34. Detailed Implementation

[0098] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following describes the gangway door retraction device of the present invention in detail with reference to the embodiments and accompanying drawings.

[0099] This embodiment provides a gangway door retraction device that enables better gangway door retraction and extension operations.

[0100] Figure 1 This is a three-dimensional structural schematic diagram of the gangway door retraction device in an embodiment of the present invention.

[0101] like Figure 1 As shown, the gangway door retraction device 100a of this embodiment includes a gangway door lock 10, a buffer mechanism 20, and an unlocking mechanism 30. The gangway door lock 10 is disposed on the gangway door and its frame, and is used to lock or unlock the gangway door. The buffer mechanism 20 is used to output resistance opposite to the direction of rotation during the opening of the gangway door and to output assistance in the same direction as the direction of rotation during its closing. The unlocking mechanism 30 is disposed on the gangway door and is used to unlock the gangway door lock 10.

[0102] It should be noted that the bottom of the gangway door is hinged to the door frame, and the gangway door lock 10 is located at the top of the gangway door and the corresponding part of the door frame. When in use, the gangway door rotates around the hinge point between itself and the door frame to open or close.

[0103] Figure 2 This is a three-dimensional structural diagram of the gangway door lock in an embodiment of the present invention; Figure 3This is a schematic diagram of the structure of the double-headed swing arm component in its first trigger position in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the double-headed swing arm component in its second trigger position in an embodiment of the present invention.

[0104] like Figures 2 to 4 As shown, the gangway door lock 10 includes a lock seat assembly 11, a lock box assembly 12, and a notification assembly 13. The lock seat assembly 11 is mounted on the door frame of the gangway door and includes a lock seat 111 and a locking pin 112 fixedly mounted on the lock seat 111. The lock box assembly 12 is mounted on the gangway door and includes a lock box 121 and a locking hook 122 rotatably mounted within the lock box 121. The locking hook 122 has a long locking tongue 122a and a short locking tongue 122b, with a locking groove 122c formed between the long locking tongue 122a and the short locking tongue 122b. The notification assembly 13 is mounted on the lock seat assembly 11 and is used to indicate whether the gangway door lock 10 is in a locked or unlocked state, thus indicating that the gangway door has been locked or unlocked. It includes a micro switch 131, a double-headed swing arm 132, and an elastic element 133. The micro switch 131 is mounted on the lock seat 111. The double-headed swing arm 132 is rotatably mounted on the lock seat 111 and can rotate between a first trigger position and a second trigger position. When the double-headed swing arm 132 is in the first trigger position, the first swinging end of the double-headed swing arm 132 presses the contact of the micro switch 131 to close it; when in the second trigger position, the first swinging end of the double-headed swing arm 132 disengages from the contact of the micro switch 131 to open it. An elastic element 133 is mounted on the lock seat 111 to give the double-headed swing arm 132 a tendency to rotate towards the first trigger position. Figure 3 The direction indicated by D1 is the locking direction. Figure 4 The direction indicated by D2 is the unlocking direction.

[0105] Understandably, when it is necessary to open the gangway door, the operator first unlocks the gangway door lock 10 through the unlocking mechanism 30, thereby unlocking the gangway door. Specifically, as the gangway door gradually opens from the closed state, the locking hook 122 rotates in the unlocking direction under the action of the unlocking mechanism 30 and external force. During the rotation, the locking pin 112 gradually disengages from the locking groove 122c, and at the same time, the short locking tongue 122b disengages from the second swing end of the double-headed swing arm 132. Under the action of the elastic member 133, the double-headed swing arm 132 gradually moves from the second trigger position to the first trigger position. When the gangway door is opened to a certain angle, the locking pin 112 completely disengages from the locking groove 122c. At the same time, the double-headed swing arm 132 rotates to the first trigger position, which changes the state of the micro switch 131. This triggers the micro switch 131 to send a signal indicating that the gangway door lock 10 is in the unlocked state, thus indicating that the gangway door has been unlocked. Then, the operator can apply force to the gangway door to make it rotate and open to the ground. During this process, the buffer mechanism 20 can output resistance in the opposite direction of its rotation, thereby slowing down the opening speed of the gangway door.

[0106] When the gangway door needs to be closed, the operator applies force to rotate and close it. During the closing process, the buffer mechanism 20 provides assistance in the same direction as the rotation, thereby reducing the operating force required to close the door. During this process, the locking hook 122 moves synchronously with the gangway door. During this movement, the long locking tongue 122a on the locking hook 122 engages with the locking pin 112 on the door frame, causing the locking hook 122 to rotate in the locking direction. During rotation, the locking pin 112 gradually engages with the locking groove 122c. Simultaneously, the short locking tongue 122b engages with the second swing end of the double-headed swing arm 132, driving the double-headed swing arm 132 to gradually rotate from the first trigger position to the second trigger position. When the gangway door is fully closed, the locking pin 112 and the locking groove 122c are fully engaged. The locking mechanism of the gangway door lock 10 is achieved simultaneously. At the same time, the double-headed swing arm 132 rotates to the second trigger position, changing the state of the micro switch 131. This triggers the micro switch 131 to send a signal indicating that the gangway door lock 10 is locked, thus indicating that the gangway door is locked and fully retracted. This allows the operator to accurately know whether the gangway door is unlocked during the lowering operation and whether it is fully retracted during the retraction operation. This prevents the gangway door from being locked or not fully unlocked when the operator applies force, and also prevents the gangway door from being incompletely retracted. This allows the operator to better perform the gangway door lowering and retraction operations.

[0107] Figure 5 This is a three-dimensional structural diagram of the lock seat assembly in an embodiment of the present invention.

[0108] like Figure 5As shown, the double-headed swing arm 132 is a rod, with its middle portion forming a rotatable support with the lock seat 111. The first swing end of the double-headed swing arm 132 is provided with a trigger part 132a, which is used to press the contact of the micro switch 131. The second swing end of the double-headed swing arm 132 is provided with a drive engagement part 132b, which is used for drive engagement with the short locking tongue 122b.

[0109] Understandably, when the locking hook 122 rotates in the locking direction, the long locking tongue 122a on the locking hook 122 engages with the driving engagement part 132b of the second swing end on the double-headed swing arm 132, thereby driving the double-headed swing arm 132 to rotate from the first trigger position to the second trigger position, so that the trigger part 132a of the first swing end on the double-headed swing arm 132 disengages from the contact of the micro switch 131 and puts it in the open state, thereby realizing the change of the state of the micro switch 131.

[0110] In this embodiment, the double-headed swing arm 132 is mounted on the lock seat 111 via a support shaft 113. The support shaft 113 is fixed on the lock seat 111, and the double-headed swing arm 132 is rotatably sleeved on the support shaft 113.

[0111] Figure 6 This is a three-dimensional structural diagram of the lock box assembly in an embodiment of the present invention.

[0112] like Figure 6 As shown, a drive structure 1221 is provided on the short locking tongue 122b, which is used to drive and engage with the drive engagement part 132b, and includes a guide part 1221a and a drive part 1221b arranged adjacent to each other. The guide part 1221a is used to guide the drive engagement part 132b to drive and engage with the drive part 1221b, and the drive part 1221b is used to drive and engage with the drive engagement part 132b.

[0113] Understandably, when the locking hook 122 rotates in the locking direction, the driving engagement part 132b first abuts against the guide part 1221a, and then, under the action of the guide part 1221a, abuts against the driving engagement part 132b, thereby driving the double-headed swing arm 132 to rotate from the first trigger position to the second trigger position.

[0114] Figure 7 This is a cross-sectional view of the lock seat assembly in an embodiment of the present invention.

[0115] like Figure 6 and Figure 7 As shown, both the driving part 1221b and the driving mating part 132b are convex arc surfaces, and the guiding part 1221a is an inclined surface.

[0116] Understandably, when the locking hook 122 rotates in the locking direction, the driving engagement part 132b first abuts against the guide part 1221a, and then, as the locking hook 122 continues to rotate, the driving engagement part 132b gradually abuts against the driving part 1221b. Since the driving part 1221b is a convex arc surface, it can push the double-headed swing arm 132 to rotate to the second trigger position during the engagement process. When the driving engagement part 132b abuts against the convex position of the driving part 1221b, the double-headed swing arm 132 rotates to the second trigger position. During the engagement process, the guide part 1221a plays a transitional role and guides the driving engagement part 132b to abut against the driving part 1221b.

[0117] like Figure 7 As shown, the elastic element 133 is a compression spring, one end of which abuts against the lock seat 111, and the other end abuts against a side wall in the swing direction of the trigger part 132a. The other side wall in the swing direction of the trigger part 132a corresponds to the contact of the micro switch 131. In the unlocked state, the double-headed swing arm 132 is held in the first trigger position by the action of the elastic element 133.

[0118] Understandably, when the drive structure 1221 engages with the drive engagement part 132b, the double-headed swing arm 132 rotates from the first trigger position to the second trigger position, during which the elastic element 133 gradually accumulates force; when the drive structure 1221 disengages from the drive engagement part 132b, the double-headed swing arm 132 rotates from the second trigger position to the first trigger position under the reset action of the elastic element 133, and the trigger part 132a on the double-headed swing arm 132 presses the contact of the micro switch 131.

[0119] like Figure 6 As shown, the length of the long latch 122a extending toward the side where the locking pin 112 is located is greater than the length of the short latch 122b extending toward the side where the locking pin 112 is located. The drive structure 1221 is provided on the side wall of the short latch 122b facing away from the long latch 122a, and the guide part 1221a is connected to the extension end of the short latch 122b.

[0120] Understandably, during the closing process of the gangway door, the locking pin 112 engages with the side wall of the long locking tongue 122a facing the short locking tongue 122b, causing the locking hook 122 to rotate in the locking direction. This allows the locking hook 122 to push the double-headed swing arm 132 to rotate to the second trigger position through the drive structure 1221 during rotation.

[0121] Figure 8 This is a partial structural schematic diagram of the lock box assembly in an embodiment of the present invention.

[0122] like Figure 8As shown, the lock box assembly 12 also includes a first reset member 123, a stop member 124, and a second reset member 125. The first reset member 123 is disposed within the lock box 121 and is used to give the lock hook 122 a tendency to rotate in the unlocking direction. The stop member 124 is rotatably disposed within the lock box 121 and is used to block the lock hook 122 in the direction of rotation in the unlocking direction. The second reset member 125 is disposed within the lock box 121 and is used to give the stop member 124 a tendency to rotate toward the side where the lock hook 122 is located, thereby blocking the lock hook 122.

[0123] Understandably, the stop 124 can resist the force of the first reset member 123, keeping the hook 122 engaged with the lock groove 122c, thus keeping the gangway door lock 10 in a locked state. In addition, after the stop 124 rotates away from the hook 122 under the action of external force to remove the obstruction, the hook 122 can rotate in the unlocking direction under the action of the first reset member 123, thereby disengaging from the lock groove 122c. After the external force on the stop 124 is removed, the hook 122 can rotate to the position that forms an obstruction to the hook 122 under the action of the second reset member 125.

[0124] In this embodiment, both the first reset member 123 and the second reset member 125 are torsion springs, and the lock hook 122 and the stop member 124 are both installed inside the lock box 121 via fixed shafts. Specifically, the first reset member 123 and the second reset member 125 are respectively sleeved on their corresponding fixed shafts. One end of the first reset member 123 abuts against the side wall of the lock box 121, and the other end abuts against the lock hook 122. One end of the second reset member 125 abuts against the side wall of the lock box 121, and the other end abuts against the stop member 124.

[0125] Figure 9 This is a schematic diagram of the distribution structure of the buffer mechanism in an embodiment of the present invention; Figure 10 This is a three-dimensional structural diagram of the first buffer component in an embodiment of the present invention; Figure 11 This is a three-dimensional structural diagram of the second buffer component in an embodiment of the present invention.

[0126] like Figure 9 and Figure 10As shown, the buffer mechanism 20 includes a first buffer assembly 21 and a second buffer assembly 22. One of them is disposed on one side of the gangway door in the width direction, and the other is disposed on the other side of the gangway door in the width direction. The first buffer assembly 21 includes a first moving member 211, a first pull rope member 212, a buffer member 213, and a first elastic reset member 214. The first moving member 211 can move in a first direction or in the opposite direction. One end of the first pull rope member 212 is drivenly connected to the first moving member 211, and the other end is connected to the door frame of the gangway door. The buffer member 213 is used to output resistance when the first moving member 211 moves in the first direction to control the speed of the first moving member 211 moving in that direction, thereby controlling the opening speed of the gangway door. The first elastic reset member 214 is at least used to drive the first moving member 211 back to its original position in the opposite direction of the first direction. Figure 9 The direction indicated by D3 is the first direction.

[0127] like Figure 11 As shown, the second buffer assembly 22 includes a second movable member 221, a second pull rope member 222, an elastic member 223, and a second elastic reset member 224. The second movable member 221 can move in a first direction or in the opposite direction. One end of the second pull rope member 222 is drivenly connected to the second movable member 221, and the other end is connected to the door frame of the gangway door. The elastic member 223 is used to output resistance when the second movable member 221 moves in the first direction and to output assistance when the second movable member 221 moves in the opposite direction. The second elastic reset member 224 is at least used to drive the second movable member 221 back to its original position in the opposite direction.

[0128] Understandably, during the opening of the gangway door, the gangway door body 10 rotates around its hinge point with the door frame. During this process, the lengths of the first pull rope 212 and the second pull rope 222 are stretched, causing the first pull rope 212 to pull the first moving member 211 to move along a first direction. During the movement of the first moving member 211, the buffer member 213 outputs resistance to reduce the speed of the first moving member 211 moving along that direction. At the same time, the second pull rope 222 pulls the second moving member 221 to move along the first direction. During the movement of the second moving member 221, the elastic member 223 outputs resistance to reduce the speed of the second moving member 221 moving along that direction. The combined resistance output by the buffer member 213 and the elastic member 223 can slow down the stretching speed of the first pull rope 212 and the second pull rope 222, thereby slowing down the opening of the gangway door. Speed; During the closing process of the gangway door, the first moving part 211 moves back to its original position in the opposite direction of the first direction under the action of the first elastic reset part 214, and the second moving part 221 moves back to its original position in the opposite direction of the first direction under the action of the second elastic reset part 224. The elastic part 223 provides assistance during the movement of the second moving part 221 back to its original position, thereby pulling the first pull rope part 212 and the second pull rope part 222 to retract. When retracting, the gangway door is assisted by the first pull rope part 212 and the second pull rope part 222 together in the same direction as its rotation, thereby reducing the operating force of closing the door. In this way, the first buffer assembly 21 and the second buffer assembly 22 can achieve a stable output of force value, and make the output force value more consistent with the change of the gravity value of the gangway door, ultimately achieving a smoother opening process of the gangway door.

[0129] Figure 12 This is a cross-sectional structural diagram of the buffer component in an embodiment of the present invention.

[0130] like Figure 12 As shown, the buffer 213 is a hydraulic buffer and extends along the moving direction of the first moving member 211. Its movable end is connected to the first moving member 211, and its fixed end is connected to the gangway door.

[0131] like Figure 12 As shown, the buffer 213 includes an outer tube 213a, an inner rod 213b, and a piston ring 213c. The piston ring 213c is slidably fitted inside the outer tube 213a and has small holes penetrating both ends of its axial direction. One end of the inner rod 213b slides into the outer tube 213a and is fixedly connected to the piston ring 213c, while the other end forms the movable end of the buffer 213 and is fixedly connected to the first moving member 211. The end of the outer tube 213a that is relatively away from the inner rod 213b forms the fixed end of the buffer 213 and is fixedly connected to the first housing 215.

[0132] Understandably, as the first moving member 211 moves along the first direction, it drives the inner rod 213b to move, thereby causing the piston ring 213c to slide inside the outer tube 213a. During the movement of the piston ring 213c, the hydraulic oil inside the outer tube 213a is compressed. The hydraulic oil will pass through the small hole of the piston ring 213c. Since the diameter of the small hole on the piston ring 213c is limited, the flow rate of the internal hydraulic oil is restricted. Therefore, the buffer member 213 outputs resistance to the first moving member 211, thereby limiting the speed of the first moving member 211 and slowing down the opening speed of the gangway door.

[0133] Figure 13 This is a partial structural schematic diagram of the second buffer component in an embodiment of the present invention.

[0134] like Figure 11 and Figure 13 As shown, the elastic element 223 outputs resistance after the second moving element 221 moves a certain distance in the first direction, at which point the gangway door opens to a certain angle. The elastic element 223 is a pneumatic strut extending along the moving direction of the second moving element 221, which has a movable connecting portion 221a. The movable end of the elastic element 223 is connected to the movable connecting portion 221a, so that after the second moving element 221 moves a certain distance in the first direction, it forms an abutting engagement with the movable end of the elastic element 223. The fixed end of the elastic element 223 is connected to the gangway door.

[0135] Understandably, during the movement of the second moving member 221 along the first direction, the elastic member 223 is compressed. During the compression process, the elastic member 223 outputs resistance to reduce the speed of the second moving member 221. During the movement of the second moving member 221 in the opposite direction of the first direction, the elastic member 223 extends. During the extension process, the elastic member 223 outputs assistance to reduce the operating force for closing the door. After the second moving member 221 moves a certain distance along the first direction and forms abutment with the movable end of the elastic member 223, during the continued movement of the second moving member 221 along the first direction, the second moving member 221 begins to compress the elastic member 223, causing the elastic member 223 to start outputting resistance. Thus, the elastic member 223 can intervene to output resistance after the gangway door is opened to a certain angle, thereby ensuring that the gangway door can be opened normally.

[0136] In this embodiment, the elastic element 223 begins to output resistance when the gangway door is opened to 80°. In actual use, the gravity of the gangway door reaches its maximum when it is opened to 100°.

[0137] like Figure 13As shown, the movable connecting portion 221a is a waist-shaped groove and extends along the moving direction of the second moving member 221. The movable end of the elastic member 223 has a sliding rod 223a that slides in conjunction with the waist-shaped groove. When the second moving member 221 moves along the first direction until the sliding rod 223a abuts against the side wall in the extending direction of the movable connecting portion 221a, the elastic member 223 begins to output resistance.

[0138] Understandably, when the second moving member 221 begins to move along the first direction, through the cooperation between the sliding member 223a and the movable connecting part 221a, the second moving member 221 will first generate a certain displacement relative to the elastic member 223. During this displacement process, the second moving member 221 and the elastic member 223 will generate relative movement, so that the elastic member 223 will not output resistance. Until the sliding member 223a abuts against the side wall in the extension direction of the movable connecting part 221a, after abutting, the second moving member 221 compresses the elastic member 223, so that the elastic member 223 begins to output resistance.

[0139] like Figure 13 As shown, the elastic element 223 can be adjusted in position along the moving direction of the second moving element 221, thereby adjusting the timing of the output resistance of the elastic element 223.

[0140] Understandably, by adjusting the position of the elastic member 223 along the moving direction of the second moving member 221, the distance between the sliding rod member 223a and the side wall in the extending direction of the movable connection 221a can be adjusted, thereby adjusting the timing of the elastic member 223 outputting resistance, and better adapting to different states of the gangway door.

[0141] Figure 14 This is a three-dimensional structural diagram of the second box in an embodiment of the present invention.

[0142] like Figure 14 As shown, the second housing 225 has multiple mounting holes 225a, which are spaced apart along the moving direction of the second moving member 221. The fixed end of the elastic member 223 is connected and fixed to one of the mounting holes 225a. Specifically, the fixed end of the elastic member 223 is connected and fixed to one of the mounting holes 225a by a screw.

[0143] Understandably, by adjusting the fixed end of the elastic element 223 to be connected and fixed with different mounting holes 225a, the position of the elastic element 223 can be adjusted along the moving direction of the second moving element 221, thereby adjusting the timing of the output resistance of the elastic element 223.

[0144] In this embodiment, there are 4 mounting holes 225a. Of course, in other alternative embodiments, there may be 5 or 6 holes, and no specific limitation is made here.

[0145] Figure 15This is a partial structural schematic diagram of the first buffer component in an embodiment of the present invention.

[0146] like Figure 10 and Figure 15 As shown, the first elastic reset member 214 is also used to assist in outputting resistance when the first moving member 211 moves along the first direction and to assist in outputting assistance when the first moving member 211 moves in the opposite direction of the first direction. The first elastic reset member 214 includes two pneumatic struts that extend along the moving direction of the first moving member 211 and are located on opposite sides of the buffer member 213. The movable end of the pneumatic strut is connected to the first moving member 211, and the fixed end is connected to the gangway door.

[0147] Understandably, during the opening of the gangway door, the first moving member 211 compresses the first elastic reset member 214 as it moves along the first direction. During the compression process, the first elastic reset member 214 outputs resistance, thereby enabling it to play an auxiliary role in outputting resistance during the opening of the gangway door, which is more conducive to achieving a smoother opening process. In addition, during the closing of the gangway door, the first elastic reset member 214 extends and drives the first moving member 211 to move back to its original position in the opposite direction of the first direction. During the return movement of the first moving member 211, the movable end of the buffer member 213 also moves, thereby providing return assistance after the buffer member 213 is fully compressed. Furthermore, it can also play an auxiliary role in outputting assistance during the closing of the gangway door, further reducing the operating force required to close the door.

[0148] In this embodiment, the movable ends of the two pneumatic struts are fixedly connected to the first movable component 211, and the fixed ends are fixedly connected to the first housing 215.

[0149] It should be noted that after the gangway door is opened 10°, it will slowly open downwards under gravity until it is fully open at 135°. In this embodiment, when the gangway door is opened to 100°, its gravitational force reaches a maximum of 328.5N, 123N at the initial 15°, and 216N at the final 135°. To address this, the first elastic reset member 214 consists of two 150N pneumatic struts, and the elastic member 223 is a 400N pneumatic strut, ensuring that the first buffer assembly 21 and the second buffer assembly 22 initially output a combined resistance of 90N, guaranteeing the normal opening of the gangway door. Furthermore, the elastic member 223 only begins to function when the gangway door is opened to 80°. After intervention, the elastic member 223 outputs a force of 120N, and the first buffer assembly 21 and the second buffer assembly 22 together output a force of 210N, less than the 216N force at the final opening of the gangway door, ensuring that the gangway door can be fully opened.

[0150] like Figure 11 and Figure 13As shown, the second elastic reset member 224 is also used to assist in outputting resistance when the second moving member 221 moves in the first direction and to assist in outputting assistance when the second moving member 221 moves in the opposite direction of the first direction. The second elastic member 223 includes two tension springs, one end of which is connected to the second moving member 221 and the other end of which is connected to the gangway door.

[0151] Understandably, during the opening of the gangway door, the second moving member 221 stretches the second elastic reset member 224 as it moves along the first direction. During the stretching process, the second elastic reset member 224 outputs resistance, thereby enabling the second elastic reset member 224 to play an auxiliary role in outputting resistance during the opening of the gangway door, which is more conducive to achieving a smoother opening process. In addition, during the closing of the gangway door, the second elastic reset member 224 retracts and resets, driving the second moving member 221 to move back to its original position in the opposite direction of the first direction. It can also play an auxiliary role in outputting assistance during the closing of the gangway door, thereby further reducing the operating force required to close the door.

[0152] Figure 16 This is a schematic diagram of the distribution structure of the first roller in an embodiment of the present invention.

[0153] like Figure 10 and Figure 16 As shown, the first buffer assembly 21 also includes a first housing 215 and two sets of first rollers 216. The first housing 215 is fixed to the side of the gangway door in the width direction, and the first moving member 211 is slidably disposed within the first housing 215. The two sets of first rollers 216 have multiple first roller units 216a, one set of first rollers 216 is disposed on the first housing 215, and the other set of first rollers 216 is disposed on the first moving member 211. The first pull rope 212 is wound around the multiple first roller units 216a within the two sets of first rollers 216, with one end connected to the first housing 215 and the other end extending out of the first housing 215 and connected to the door frame of the gangway door.

[0154] Understandably, during the opening of the gangway door, since one end of the first pull rope 212 is fixed to the door frame of the gangway door, the first pull rope 212 can be stretched. When the first pull rope 212 is stretched, under the action of multiple first roller units 216a in the two sets of first rollers 216, it can pull the first moving member 211 to move in the first direction, thereby enabling the gangway door to be opened. The multiple first roller units 216a can tighten the first pull rope 212 and ensure that the length of the first pull rope 212 is long enough to ensure that the action of opening the gangway door can be completed.

[0155] Figure 17 This is a schematic diagram of the distribution structure of the second roller in an embodiment of the present invention.

[0156] like Figure 11 and Figure 17 As shown, the second buffer assembly 22 also includes a second housing 225 and two sets of second rollers 226. The second housing 225 is fixed to the side of the gangway door in the width direction, and the second moving member 221 is slidably disposed within the second housing 225. The two sets of second rollers 226 have multiple second roller units 226a, one set of second rollers 226 is disposed on the second housing 225, and the other set of second rollers 226 is disposed on the second moving member 221. The second pull rope member 222 is wound around the multiple second roller units 226a within the two sets of second rollers 226, with one end connected to the second housing 225 and the other end extending out of the second housing 225 and connected to the door frame of the gangway door.

[0157] Understandably, during the opening of the gangway door, since one end of the second pull rope 222 is fixed to the door frame of the gangway door, the second pull rope 222 can be stretched. When the second pull rope 222 is stretched, under the action of multiple second roller units 226a in the two sets of second rollers 226, it can pull the second moving member 221 to move in the first direction, thereby enabling the gangway door to be opened. The multiple second roller units 226a can tighten the second pull rope 222 and ensure that the length of the second pull rope 222 is long enough to ensure that the action of opening the gangway door can be completed.

[0158] It should be noted that the multiple first rollers 216a and second rollers 226a are arranged at intervals. In this embodiment, the first pull rope member 212 and the second pull rope member 222 are both steel wire ropes. The first pull rope member 212 passes through multiple first roller units 216a in sequence, and the second pull rope member 222 passes through multiple second roller units 226a in sequence, so as to ensure that the lengths of the first pull rope member 212 and the second pull rope member 222 are sufficiently long.

[0159] In this embodiment, there are eight first roller units 216a and eight second roller units 226a, with three disposed on the first moving member 211 or the second moving member 221 and five disposed on the first housing 215 or the second housing 225. However, this is not a limitation; there may also be four first roller units 216a and four second roller units 226a. The specific number of first roller units 216a and second roller units 226a is not limited.

[0160] Figure 18 This is a schematic diagram of the main structure of the unlocking mechanism in an embodiment of the present invention.

[0161] like Figure 1 and Figure 18As shown, the unlocking mechanism 30 includes an inner unlocking component 31, an outer unlocking component 32, a first pull rope 33, and a second pull rope 34. The inner unlocking component 31 is disposed on the surface of the gangway door facing the cabin interior and is used to unlock the gangway door lock 10 from inside the cabin. The outer unlocking component 32 is disposed on the surface of the gangway door facing the cabin exterior and is used to unlock the gangway door lock 10 from outside the cabin.

[0162] In this embodiment, there are two gangway door locks 10. The two gangway door locks 10 are arranged on the gangway door at intervals, thereby forming two locking points between the gangway door and the door frame to ensure the stability of the locking.

[0163] Figure 19 This is a schematic diagram of the main view structure of the internal unlocking component in an embodiment of the present invention; Figure 20 This is a schematic diagram of the main structure of the external unlocking component in an embodiment of the present invention.

[0164] like Figure 3 , Figure 18 as well as Figure 19 As shown, the two gangway door locks 10 are respectively connected to the inner unlocking assembly 31 via a first pull rope 33. Specifically, one end of the first pull rope 33 is fixedly connected to the rotating end of the stop member 124, and the other end is fixedly connected to a swing end of the inner swing arm of the inner unlocking assembly 31.

[0165] Understandably, when the inner unlocking component 31 is working, it can drive the swing arm inside the inner unlocking component 31 to rotate. During the rotation of the swing arm, it can pull the stop 124 inside the two gangway door locks 10 to rotate toward the side away from the lock hook 122 through the first pull rope 33, thereby removing the stop 124 from blocking the lock hook 122 in the unlocking direction. As a result, the lock hook 122 can rotate in the unlocking direction under the action of the first reset component 123, thereby unlocking the gangway door lock 10.

[0166] like Figure 18 and Figure 20 As shown, the inner unlocking component 31 is connected to the outer unlocking component 32 via a second pull rope 34. Specifically, one end of the second pull rope 34 is fixedly connected to a swing end of the inner swing arm of the inner unlocking component 31, and the other end is fixedly connected to a swing end of the inner swing arm of the outer unlocking component 32.

[0167] Understandably, when the external unlocking component 32 is in operation, it can pull the swing arm in the internal unlocking component 31 to rotate via the second pull rope 34, thereby pulling the stop 124 in the two gangway door locks 10 to rotate toward the side away from the lock hook 122 via the first pull rope 33, thereby unlocking the gangway door lock 10.

[0168] In this embodiment, the structure of the inner unlocking component 31 and the outer unlocking component 32 is consistent with the structure of the "inner locking disc component and outer locking disc component" disclosed in Chinese Invention Patent CN202111268319.9, so it will not be described in detail here.

[0169] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A gangway door retraction device, characterized in that, include: A gangway door lock (10) is installed on the gangway door and its door frame for locking or unlocking the gangway door; A buffer mechanism (20) is used to output resistance in the opposite direction of rotation during the opening of the gangway door and to output assistance in the same direction of rotation during its closing. as well as An unlocking mechanism (30) is provided on the gangway door for unlocking the gangway door lock (10). The gangway door lock (10) includes: A lock seat assembly (11) is provided on the door frame of the gangway door, including a lock seat (111) and a locking pin (112) fixedly provided on the lock seat (111); A lock box assembly (12), disposed on the gangway door, includes a lock box (121) and a lock hook (122) rotatably disposed within the lock box (121). The lock hook (122) has a long lock tongue (122a) and a short lock tongue (122b), and a lock groove (122c) is formed between the long lock tongue (122a) and the short lock tongue (122b); and A notification component (13), disposed on the lock seat assembly (11), is used to indicate whether the gangway door lock (10) is in a locked or unlocked state, thereby indicating that the gangway door has been locked or unlocked, including: A micro switch (131) is disposed on the lock base (111); The double-headed swing arm (132) is rotatably mounted on the lock seat (111) and can rotate between the first trigger position and the second trigger position. When the double-headed swing arm (132) is in the first trigger position, the first swing end of the double-headed swing arm (132) presses the contact of the micro switch (131) to close it; when the double-headed swing arm (132) is in the second trigger position, the first swing end of the double-headed swing arm (132) disengages from the contact of the micro switch (131) to open it; and An elastic element (133), disposed on the lock seat (111), is used to give the double-headed swing arm (132) a tendency to rotate toward the first trigger position. During the closing process of the gangway door, the locking pin (112) and the long locking tongue (122a) collide and engage, causing the locking hook (122) to rotate in the locking direction. During this process, the locking pin (112) gradually engages with the locking groove (122c), while the short locking tongue (122b) engages with the second swing end of the double-headed swing arm (132) and drives the double-headed swing arm (132) to gradually rotate from the first trigger position to the second trigger position. As the gangway door gradually opens from the closed state, the locking hook (122) rotates in the unlocking direction under the action of the unlocking mechanism (30) and external force. During this process, the locking pin (112) gradually disengages from the locking groove (122c), and at the same time, the short locking tongue (122b) disengages from the second swing end of the double-headed swing arm (132). Under the action of the elastic member (133), the double-headed swing arm (132) gradually rotates from the second trigger position to the first trigger position.

2. The gangway door retraction device according to claim 1, characterized in that: in, The double-headed swing arm (132) is a rod, the middle part of which forms a rotational support with the lock seat (111). The first swing end of the double-headed swing arm (132) is provided with a trigger part (132a), which is used to press the contact of the micro switch (131). The second swing end of the double-headed swing arm (132) is provided with a drive engagement part (132b), which is used to drive engagement with the short locking tongue (122b).

3. The gangway door retraction device according to claim 2, characterized in that: in, The short locking tongue (122b) is provided with a driving structure (1221), which is used to drive and engage with the driving engagement part (132b), and includes an adjacent guide part (1221a) and a driving part (1221b). The guide portion (1221a) is used to guide the drive mating portion (132b) to drive and engage with the drive portion (1221b), and the drive portion (1221b) is used to drive and engage with the drive mating portion (132b). Both the driving part (1221b) and the driving mating part (132b) are convex arc surfaces, and the guiding part (1221a) is an inclined surface. When the locking hook (122) rotates in the locking direction, the driving engagement part (132b) first abuts against the guide part (1221a), and then abuts against the driving engagement part (132b) under the action of the guide part (1221a), thereby driving the double-headed swing arm (132) to rotate from the first trigger position to the second trigger position.

4. The gangway door retraction device according to claim 3, characterized in that: in, The length of the long latch (122a) extending toward the side where the locking pin (112) is located is greater than the length of the short latch (122b) extending toward the side where the locking pin (112) is located. The drive structure (1221) is disposed on the side wall of the short latch (122b) facing away from the long latch (122a), and the guide portion (1221a) is connected to the extension end of the short latch (122b). During the closing process of the gangway door, the locking pin (112) engages with the side wall of the long latch (122a) facing the short latch (122b) to cause the locking hook (122) to rotate in the locking direction.

5. The gangway door retraction device according to any one of claims 1-4, Its features are: The buffer mechanism (20) includes a first buffer component (21) and a second buffer component (22). One of the two is located on one side of the gangway door in the width direction, and the other is located on the other side of the gangway door in the width direction; The first buffer component (21) includes: The first moving part (211) can move in a first direction or in the opposite direction of the first direction; The first pull rope (212) is driven to the first moving part (211) at one end and connected to the door frame of the gangway door at the other end. A buffer (213) is provided to output resistance when the first moving member (211) moves along the first direction, so as to control the speed at which the first moving member (211) moves along that direction, thereby controlling the speed at which the gangway door opens; and The first elastic reset member (214) is at least used to drive the first moving member (211) to move back to its original position in the opposite direction of the first direction. The second buffer component (22) includes: The second moving part (221) can move in the first direction or in the opposite direction of the first direction; The second pull rope (222) is driven to the second moving part (221) at one end and connected to the door frame of the gangway door at the other end; An elastic element (223) is configured to output resistance when the second moving member (221) moves in the first direction and to output assistance when the second moving member (221) moves in the opposite direction to the first direction; and The second elastic reset member (224) is at least used to drive the second moving member (221) back to its original position in the opposite direction of the first direction. During the opening of the gangway door, the first moving part (211) and the second moving part (221) move along the first direction; During the closing of the gangway door, the first moving part (211) and the second moving part (221) move back to their original positions in the opposite direction to the first direction.

6. The gangway door retraction device according to claim 5, characterized in that: in, The buffer (213) is a hydraulic buffer and extends along the moving direction of the first moving member (211). Its movable end is connected to the first moving member (211), and its fixed end is connected to the gangway door.

7. The gangway door retraction device according to claim 5, characterized in that: in, The elastic element (223) is used to output resistance after the second moving element (221) moves a certain distance along the first direction, at which time the gangway door opens to a certain angle. The elastic element (223) is a pneumatic strut and extends along the moving direction of the second moving element (221). The second moving element (221) has a movable connecting part (221a). The movable end of the elastic member (223) is connected to the movable connecting part (221a) so that the second moving member (221) moves a certain distance along the first direction and then forms an abutment with the movable end of the elastic member (223). The fixed end of the elastic element (223) is connected to the gangway door.

8. The gangway door retraction device according to claim 7, characterized in that: in, The movable connecting part (221a) is an oblong groove and extends along the moving direction of the second moving member (221). The movable end of the elastic element (223) has a sliding rod (223a) that slides with the waist-shaped groove. When the second moving member (221) moves along the first direction to abut against the side wall of the movable connecting part (221a) in the extending direction, the elastic member (223) begins to output resistance.

9. The gangway door retraction device according to claim 5, characterized in that: in, The first elastic reset member (214) is also used to assist in outputting resistance when the first moving member (211) moves along the first direction and to assist in outputting assistance when the first moving member (211) moves in the opposite direction of the first direction. The first elastic reset member (214) includes two pneumatic struts that extend along the moving direction of the first moving member (211) and are located on opposite sides of the buffer member (213). The movable end of the pneumatic strut is connected to the first movable component (211), and the fixed end is connected to the gangway door.

10. The gangway door retraction device according to claim 5, characterized in that: in, The second elastic reset member (224) is also used to assist in outputting resistance when the second moving member (221) moves along the first direction and to assist in outputting assistance when the second moving member (221) moves in the opposite direction of the first direction. The second elastic member (223) includes two tension springs, one end of which is connected to the second movable member (221) and the other end of which is connected to the gangway door.

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