Sliding door structure with emergency exit and emergency throwing method thereof

Abstract

The invention provides a sliding door structure with an emergency exit and an emergency throwing method thereof.In the structure, an upper sliding rail, a middle sliding rail and a lower sliding rail are fixed to a machine body structure, a sliding door slides in the upper sliding rail, the middle sliding rail and the lower sliding rail through a pulley and a swing arm, and the sliding door is provided with an emergency exit channel above the waterline position; the ball socket support, the first lock seat, the second lock seat and the sliding block are installed on the periphery of an emergency exit channel on the sliding door. The bulb hinge, the bolt throwing mechanism, the handle, the transparent protective cover plate and the interior trim panel are mounted on the emergency door; the emergency door is respectively matched with the ball socket support, the first lock seat and the second lock seat through the ball head hinge and the bolt throwing mechanism and is fixed on the sliding door; the handle is connected with the bolt throwing mechanism and is used for operating the throwing emergency door; the overland and overwater emergency evacuation requirements can be met at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of structural design, and in particular relates to a sliding door structure with an emergency exit and an emergency throwing method thereof. Background Art

[0002] In order to meet the requirements of crane rescue, airborne airdrop, etc., large transport helicopters are generally equipped with sliding doors on the side of the fuselage that slide open along the surface of the fuselage. The sliding door opening is flush with the cabin floor, and the sliding doors serve as emergency exits on both sides of the cabin.

[0003] Airworthiness requirements require that large transport helicopters have emergency exits on both sides of the cabin that are flush with the cabin floor openings for emergency evacuation on land, and emergency exits on both sides of the cabin that are above the waterline for emergency evacuation on water. The waterline is generally higher than the cabin floor. When a helicopter makes an emergency landing on water, the bottom of the outer surface of the sliding door is immersed in water, making it difficult to open the sliding door. Directly opening the sliding door will cause water to enter the cabin. General sliding doors cannot meet the requirements for emergency evacuation on water.

[0004] Therefore, it is necessary to provide a sliding door structure that can not only realize the sliding function but also meet the emergency exit requirements for emergency evacuation on land and water. Summary of the invention

[0005] In order to solve the problem in the prior art that it is difficult to open the sliding door, directly opening the sliding door will cause water to enter the cabin, and the sliding door cannot meet the requirements of emergency evacuation on water, the present invention provides a sliding door structure with an emergency exit and an emergency release method thereof, which adopts a sliding door design with a normal sliding function, and at the same time, an emergency door is arranged above the waterline position of the sliding door. After the emergency door is released, it serves as an emergency exit for emergency evacuation on water, and the sliding door meets the requirements of emergency exits for emergency evacuation on land and on water at the same time. The technical solution is as follows:

[0006] In a first aspect, a sliding door structure with an emergency exit is provided, comprising: a sliding door 10, an emergency door 20, an upper slide rail 30, a pulley 31, a swing arm 32, a middle slide rail 40, a lower slide rail 50, an emergency exit channel 60, a ball and socket support 70, a first lock seat 80, a second lock seat 90, a slider 100, a ball head hinge 110, a latch release mechanism 120, a handle 130, a transparent protective cover 140, and an interior panel 150; wherein the upper slide rail 30, the middle slide rail 40, and the lower slide rail 50 are fixed to the fuselage structure, the sliding door 10 slides in the upper slide rail 30, the middle slide rail 40, and the lower slide rail 50 through five groups of pulleys 31 and two groups of swing arms 32, and the sliding door 10 is provided with an emergency exit channel 60 above the waterline position. Exit channel 60; ball and socket bearing 70, first lock seat 80, second lock seat 90 and slider 100 are installed around emergency exit channel 60 on sliding door 10; ball hinge 110, latch release mechanism 120, handle 130, transparent protective cover 140 and interior panel 150 are installed on emergency door 20; emergency door 20 is respectively matched with ball and socket bearing 70, first lock seat 80 and second lock seat 90 through ball hinge 110 and latch release mechanism 120 and fixed on sliding door 10; handle 130 is connected with latch release mechanism 120 for operating and releasing emergency door 20, and transparent protective cover 140 and interior panel 150 are used to protect handle 130 and latch release mechanism 120.

[0007] The emergency exit passage 60 is a structure with a flange, which covers the inner surface of the emergency door 20 and shields the ball hinge 110 on the emergency door 20 and the pin of the pin throwing mechanism 120 .

[0008] The emergency exit passage 60 is a rectangular opening with rounded corners, with an opening size of 520 mm in width and 950 mm in height. The bottom of the emergency exit passage 60 is higher than the waterline, and the transition between the inner surfaces of the sliding door 10 and the emergency door 20 is smooth with no exposed objects.

[0009] Furthermore, a sealing strip 160 is provided between the emergency door 20 and the sliding door 10 , and the cross section of the sealing strip 160 is a triangular inner cavity with a long side structure.

[0010] Among them, an upper slide rail 30 is arranged on the top of the sliding door 10, a middle slide rail 40 is arranged in the middle position of the rear part, and a lower slide rail 50 is arranged at the bottom. The pulleys 31 at the front upper end and the rear upper end of the sliding door 10 slide in the upper slide rail 30, the pulley 31 in the middle of the rear end of the sliding door 10 slides in the middle slide rail 40, and the pulleys 31 at the front lower end and the rear lower end of the sliding door 10 slide in the lower slide rail 50; the pulleys 31 at the rear upper end and the rear lower end are connected to the sliding door 10 through the swing arm 32, and the swing arm 32 releases the Z-direction rotation freedom of the pulleys 31 at the rear upper end and the rear lower end. The three sets of slide rails, five sets of pulley groups and two sets of swing arms jointly ensure the sliding stability and connection stiffness of the sliding door 10.

[0011] Among them, a ball socket support 70 is provided at the top position of the emergency exit channel 60 on the sliding door 10, and a ball hinge 110 is installed on the top of the emergency door 20. The ball hinge 110 is inserted into the ball socket support 70 to cooperate in limiting the front and rear and inside and outside positions of the emergency door 20; the emergency door 20 can rotate in the ball socket support 70 around the rotating axis of the ball center connecting the front and rear ball hinges 110, and can fall down along the ball socket opening of the ball socket support 70.

[0012] Among them, the latch releasing mechanism 120 includes: a latch 121, a bottom latch 122, a rocker arm 123, a pull rod 124, a spring pre-tensioning mechanism 125 and a limiting column 126; wherein the rocker arm 123 is fixedly connected to the handle 130, the rocker arm 123 is respectively connected to the front and rear two latches 121 and the bottom latch 122 through three pull rods 124, and the rocker arm 123 is connected to the spring pre-tensioning mechanism 125; the spring pre-tensioning mechanism 125 pre-tensions the opening and closing positions of the latch releasing mechanism 120, and the limiting column 126 limits the closing position of the latch releasing mechanism 120.

[0013] Among them, a first lock seat 80 is arranged on both sides of the bottom of the emergency exit channel 60 on the sliding door 10, and a lock seat 90 and two front and rear sliders 100 are arranged at the bottom of the emergency exit channel 60; the two sides of the bottom of the emergency door 20 are inserted into the first lock seat 80 on the sliding door 10 through the front and rear two latches 121 to limit the inside and outside positions; the bottom of the emergency door 20 is inserted into the second lock seat 90 on the sliding door 10 through the bottom latch 122 to limit the front and rear positions; the slider 100 contacts the bottom inclined surface of the emergency door 20; the closed state of the latch 121 is an over-dead point state, and when the handle 130 is turned to throw it, the latch 121 is first inserted and then pulled out from the first lock seat 80.

[0014] Among them, the transparent protective cover 140 is installed on the outer surface of the handle 130 to protect the handle 130 from misoperation, and an easy-to-break hole is provided at the mounting screw on the upper end of the transparent protective cover 140; the interior panel 150 is installed between the handle 130 and the latch releasing mechanism 120 to cover the latch releasing mechanism 120; except for the handle 130 and the transparent protective cover 150, there is no other exposed object on the inner surface of the emergency door 20.

[0015] In a second aspect, there is provided an emergency ejection method for a sliding door structure as described in any one of the first aspects, the method comprising: first breaking off the transparent protective cover plate 140 to expose the handle 130 during emergency evacuation; rotating the handle 130, the handle 130 drives the rocker arm 123 to pull the front and rear two latches 121 and the bottom latch 122 out of the first lock seat 80 and the second lock seat 90; pushing the handle 130 outward, the ball head hinge 110 at the top of the emergency door 20 rotates around the ball center connecting shaft of the front and rear ball socket supports 70, and the bottom inclined surface of the emergency door 20 slides out along the slider 100; pushing the handle 130 downward to eject the emergency door 20, and the emergency door 20 falls down along the ball socket opening of the ball socket support 70 under the action of gravity and thrust.

[0016] The beneficial effects of the present invention are at least:

[0017] 1. Large-sized sliding doors can be used, and can meet the requirements of emergency evacuation on land and water at the same time;

[0018] 2. The emergency door does not affect the daily use of the sliding door;

[0019] 3. After the emergency door is released, the passage is barrier-free;

[0020] 4. The emergency door is simple and reliable to operate, and easy to install and disassemble;

[0021] 5. The overall rigidity and sealing effect of sliding doors and emergency doors are good, and the transition is natural and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a sliding door with an emergency exit according to the present invention;

[0023] Figure 2 This is a schematic diagram of the sliding door emergency exit passage of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the emergency door of the present invention;

[0025] Figure 4 It is a schematic diagram of the ball joint and ball socket support structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the latch throwing mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the cooperation between the ball head hinge and the ball socket support of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the latch releasing mechanism of the present invention. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below through specific implementation modes and drawings.

[0030] See also Figure 1 and Figure 3 An embodiment of the present invention provides a sliding door structure with an emergency exit, comprising: a sliding door 10, an emergency door 20, an upper slide rail 30, a pulley 31, a swing arm 32, a middle slide rail 40, a lower slide rail 50, an emergency exit channel 60, a ball and socket support 70, a first lock seat 80, a second lock seat 90, a slider 100, a ball hinge 110, a latch throwing mechanism 120, a handle 130, a transparent protective cover 140, an interior panel 150 and a sealing strip 160, etc.;

[0031] Among them, the upper slide rail 30, the middle slide rail 40 and the lower slide rail 50 are fixed on the fuselage structure.

[0032] The sliding door 10 slides in the upper slide rail 30, the middle slide rail 40 and the lower slide rail 50 through five sets of pulleys 31 and two sets of swing arms 32. The sliding door 10 is provided with an emergency exit passage 60 above the waterline. The ball and socket support 70, the first lock seat 80, the second lock seat 90 and the slider 100 are installed around the emergency exit passage 60 on the sliding door 10. The ball hinge 110, the latch release mechanism 120, the handle 130, the transparent protective cover plate 140 and the interior panel 150 are installed on the emergency door 20.

[0033] The emergency door 20 is respectively matched with the ball and socket support 70, the first lock seat 80 and the second lock seat 90 through the ball hinge 110 and the latch ejection mechanism 120 and fixed on the sliding door 10.

[0034] The handle 130 is connected to the latch ejection mechanism 120 and is used to operate and eject the emergency door 20 .

[0035] The transparent protective cover plate 140 and the interior trim plate 150 are used to protect the handle 130 and the latch ejection mechanism 120 .

[0036] Figure 1 FIG. 1 is a schematic diagram of the structure of a sliding door with an emergency exit according to the present invention, wherein the sliding door 10 is in an open state. Figure 1 As shown,

[0037] In the sliding door structure with emergency exit of the present invention, an emergency door 20 is arranged in the middle and upper part of the sliding door 10. The emergency door 20 is usually installed on the sliding door 10 and is not opened, which does not affect the daily opening, closing and sealing of the sliding door 10. In an emergency, the emergency exit passage serves as an emergency escape exit. The opening of the sliding door 10 is flush with the cabin floor, and the emergency exit passage 60 is located above the waterline. After the sliding door 10 is opened normally, it becomes a type II emergency exit and can be used as an emergency evacuation exit on land. After the emergency door 20 is opened, it serves as an emergency evacuation exit on water.

[0038] The sliding door 10 is a rectangle whose height is greater than its width, and the emergency exit passage 60 in the middle is also a rectangle whose height is greater than its width. The sliding door 10 is connected to the slide rail on the fuselage through pulleys and slides in the slide rail. In order to ensure the connection rigidity of the sliding door 10, five pulleys 31 are arranged at the four corners of the sliding door 10 and the middle and rear part behind the emergency exit passage 60. Based on the principle of three points being coplanar, in order to avoid sliding jam, a three-slide rail design is adopted, with an upper slide rail 30 arranged at the top, a middle slide rail 40 arranged at the middle position of the rear, and a lower slide rail 50 arranged at the bottom. In order to avoid over-constraint and simplify the slide rail design, the pulleys 31 at the rear upper end and the rear lower end of the sliding door 10 are connected to the sliding door 10 through swing arms 32. The swing arms 32 release the Z-direction rotational freedom of the pulleys 31 at the rear upper end and the rear lower end. The three sets of slide rails, the five sets of pulleys and the two sets of swing arms jointly ensure the sliding stability and connection rigidity of the sliding door 10.

[0039] The pulleys 31 at the front upper end and the rear upper end of the sliding door 10 slide in the upper slide rail 30, the pulley 31 in the middle of the rear end of the sliding door 10 slides in the middle slide rail 40, and the pulleys 31 at the front lower end and the rear lower end of the sliding door 10 slide in the lower slide rail 50.

[0040] The upper slide rail 30 , the middle slide rail 40 and the lower slide rail 50 are all curved slide rails. When the sliding door 10 is opened and slid, it will first slide outward and then slide backward, and the swing arm 32 will rotate relative to the sliding door 10 and the pulley 31 in the curved section.

[0041] Figure 2 The schematic diagram of the sliding door emergency exit passage of the sliding door structure with emergency exit of the present invention is shown in FIG. The emergency exit passage 60 is a rectangular opening with rounded corners, with an opening width of 520 mm and a height of 950 mm. The bottom of the emergency exit passage 60 is higher than the waterline, and the opening size is larger than the Type III emergency exit required by airworthiness, and there is no raised shielding around it.

[0042] The emergency exit passage 60 is a structure with a flange, which covers the inner surface of the emergency door 20, shielding the ball hinge 110 on the emergency door 20 and the latch of the latch throwing mechanism 120; the transition between the sliding door 10 and the inner surface of the emergency door 20 is smooth and without exposed objects.

[0043] A ball and socket support 70 is provided at the top position around the emergency exit channel 60 on the sliding door 10, a first lock seat 80 is provided on both sides of the bottom of the emergency exit channel 60 on the sliding door 10, and a second lock seat 90 and two front and rear sliders 100 are provided at the bottom of the emergency exit channel 60; the ball and socket support 70, the first lock seat 80, the second lock seat 90 and the slider 100 are used to limit and fix the installation of the emergency door 20.

[0044] Figure 3Schematic diagram of an emergency door 20 of a sliding door structure with an emergency exit according to the present invention, wherein a glass is installed in the middle upper part for observing the outside conditions during daily and emergency evacuation.

[0045] Two sets of ball hinges 110 are arranged at the top of the emergency door 20, and a latch throwing mechanism 120, a handle 130, a transparent protective cover plate 140, and an interior panel 150 are arranged at the middle lower part of the emergency door 20. A transparent protective cover plate 140 is installed on the handle 130 to cover the handle 130 to prevent the emergency door from being thrown away due to accidental touching of the handle 130 in daily use. An easy-to-break hole is arranged at the mounting screw on the upper end of the transparent protective cover plate 140, and the transparent protective cover plate 140 can be broken off during emergency evacuation, and the transparent protective cover plate 140 will break horizontally from the easy-to-break hole, and then the handle 130 will be completely exposed.

[0046] The upper surface of the bolt throwing mechanism 120 is provided with an interior decoration plate 150 to protect the mechanism from being exposed. The interior decoration plate 150 is provided with a handle shaft through hole and a handle rotation depression, and the depth and width of the depression can accommodate a human hand to grasp and rotate the handle.

[0047] The inner surface of the emergency door 20 has no other exposed objects except the handle 130 and the transparent protective cover plate 140. The interior trim plate 150 is flush with the inner surface of the emergency door 20.

[0048] Figure 4 It is a schematic diagram of the ball hinge 110 and the ball socket support 70 of the emergency door. The neck between the ball head of the ball hinge 110 and the mounting surface is contracted and transitioned. The ball head of the ball hinge 110 has the same radius as the ball socket of the ball socket support 70. The ball head of the ball hinge 110 is inserted into the ball socket of the ball socket support 70 to limit the front and rear and inside and outside positions of the emergency door. The emergency door 20 can rotate in the ball socket support 70 around the rotating axis of the ball center line connecting the front and rear ball hinges 110, and can fall down along the ball socket opening of the ball socket support 70.

[0049] Figure 5 1 is a schematic diagram of the latch ejection mechanism 120, in which the transparent protective cover plate 140 and the interior panel 150 are removed. The latch ejection mechanism 120 includes: a latch 121, a bottom latch 122, a rocker arm 123, a pull rod 124, a spring preload mechanism 125 and a limit column 126;

[0050] The rocker arm 123 is fixedly connected to the handle 130, and the rocker arm 123 is respectively connected to the front and rear two latches 121 and the bottom latch 122 through three pull rods 124. The rocker arm 123 is connected to the spring preload mechanism 125; turning the handle 130 can drive the rocker arm 123 to simultaneously pull the front and rear two latches 121 and the bottom latch 122 out of the emergency door 20 through the three pull rods 124. The spring preload mechanism 125 preloads the open and closed positions of the latch ejection mechanism 120, and the limit column 126 limits the closed position of the latch ejection mechanism 120.

[0051] The two sides of the bottom of the emergency door 20 are inserted into the first lock seat 80 on the sliding door 10 through the front and rear two latches 121 to limit the inside and outside positions; the bottom of the emergency door 20 is inserted into the second lock seat 90 on the sliding door 10 through the bottom latch 122 to limit the front and rear positions; the sliding block 100 contacts the bottom inclined surface of the emergency door 20; the closed state of the latch 121 is the over-dead point state, and when the handle 130 is turned to throw it, the latch 121 is first inserted and then pulled out from the first lock seat 80.

[0052] Figure 6 It is a cross-sectional diagram of the fitting point between the ball hinge 110 and the ball socket support 70 at the upper end of the emergency door. The ball head of the ball hinge 110 at the top of the emergency door 20 is inserted into the ball socket of the ball socket support 70. The contraction of the neck between the ball head of the ball hinge 110 and the mounting surface allows the ball hinge 110 to avoid the wall of the ball socket when the ball socket support 70 rotates, thereby allowing the emergency door 20 to rotate a maximum of 10 degrees relative to the sliding door 10.

[0053] Figure 7 Schematic diagram of the emergency door latch throwing mechanism 120, the latch 121 is installed in the latch hole in the middle of the inner cavity of the emergency door 20, and the latch 121 is inserted into the first lock seat 80 on the sliding door 10 when the emergency door is closed.

[0054] like Figure 6 and Figure 7 As shown, when the emergency door is closed, the emergency exit channel 60 is folded to cover the emergency door 20, and only the ball hinge 110 and the two front and rear latches 121 and the bottom latch 122 are partially exposed to the installation observation gap, forming a good shielding transition as a whole, which is simple and beautiful without the need to increase the interior covering seams.

[0055] like Figure 6 and Figure 7 As shown, there is a sealing strip 160 between the emergency door 20 and the sliding door 10 to seal and waterproof the emergency door. In one embodiment, the cross section of the sealing strip 160 is a triangular inner cavity with a long side structure, which combines the advantages of the high compression stiffness of the hollow sealing strip and the large compression amount of the L-shaped sealing strip. The triangular inner cavity ensures a certain compression stiffness, and the long side structure makes the compression amount of the sealing strip large. The transition between the emergency door and the sliding door is natural, the sealing is good, and it does not affect the daily use of the sliding door.

[0056] The emergency door 20 is limited by inserting the upper ball hinge 110 into the ball socket support 70, and the front and rear two pins 121 on both sides of the lower end are inserted into the first lock seat 80 to limit the inside and outside positions, and the bottom pin 122 at the lower end is inserted into the lock seat 90 to limit the front and rear positions, and the upper and lower positions are limited by the bottom inclined surface of the emergency door 20 and the slider 100. In this way, the emergency door 20 is locked on the sliding door 10.

[0057] The emergency release method process in the embodiment of the present invention is as follows:

[0058] 1) During emergency evacuation, first break off the transparent protective cover 140 to expose the handle 130;

[0059] 2) Turn the handle 130, and the handle 130 drives the rocker arm 123 to pull the front and rear two latches 121 and the bottom latch 122 out of the first lock seat 80 and the second lock seat 90;

[0060] 3) Push the handle 130 outward, the ball hinge 110 on the top of the emergency door 20 rotates around the ball center connecting shaft of the front and rear ball socket supports 70, and the bottom inclined surface of the emergency door 20 slides out along the slider 100;

[0061] 4) Push the handle 130 downward to throw away the emergency door 20, and the emergency door 20 falls down along the ball socket opening of the ball socket support 70 under the action of gravity and thrust.

[0062] The above only expresses the implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. In addition, the parts not detailed in the present invention are all conventional technologies.

Claims

1. A sliding door structure with an emergency exit, characterized in that: include: A sliding door (10), an emergency door (20), an upper sliding rail (30), a pulley (31), a swing arm (32), a middle sliding rail (40), a lower sliding rail (50), an emergency exit passage (60), a ball socket support (70), a first lock seat (80), a second lock seat (90), a slider (100), a ball head hinge (110), a latch ejection mechanism (120), a handle (130), a transparent protective cover (140), and an interior panel (150); wherein the upper sliding rail (30), the middle sliding rail (40), and the lower sliding rail (50) are fixed on the fuselage structure, the sliding door (10) slides in the upper sliding rail (30), the middle sliding rail (40), and the lower sliding rail (50) through the pulley (31) and the swing arm (32), and the sliding door (10) is at the waterline position. An emergency exit passage (60) is arranged above the sliding door (10); a ball and socket support (70), a first lock seat (80), a second lock seat (90) and a sliding block (100) are installed around the emergency exit passage (60) on the sliding door (10); a ball hinge (110), a latch release mechanism (120), a handle (130), a transparent protective cover plate (140) and an interior trim plate (150) are installed on the emergency door (20); the emergency door (20) is respectively matched with the ball and socket support (70), the first lock seat (80) and the second lock seat (90) through the ball hinge (110) and the latch release mechanism (120) and is fixed on the sliding door (10); the handle (130) is connected to the latch release mechanism (120) and is used to operate and release the emergency door (20).

2. The sliding door structure with emergency exit according to claim 1, characterized in that: The emergency exit passage (60) is a structure with a flange, and the flange covers the inner surface of the emergency door (20), shielding the ball hinge (110) on the emergency door (20) and the latch of the latch throwing mechanism (120).

3. The sliding door structure with emergency exit according to claim 1, characterized in that: The emergency exit passage (60) is a rectangular opening with rounded corners, with an opening width of 520 mm and a height of 950 mm. The bottom of the emergency exit passage (60) is higher than the waterline.

4. The sliding door structure with emergency exit according to claim 1, characterized in that: A sealing strip (160) is provided between the emergency door (20) and the sliding door (10), and the cross section of the sealing strip (160) is a triangular inner cavity with a long side structure.

5. The sliding door structure with emergency exit according to claim 1, characterized in that: An upper slide rail (30) is arranged at the top of the sliding door (10), a middle slide rail (40) is arranged at the middle position of the rear part, and a lower slide rail (50) is arranged at the bottom. The pulleys (31) at the front upper end and the rear upper end of the sliding door (10) slide in the upper slide rail (30), the pulley (31) at the middle of the rear end of the sliding door (10) slides in the middle slide rail (40), and the pulleys (31) at the front lower end and the rear lower end of the sliding door (10) slide in the lower slide rail (50); the pulleys (31) at the rear upper end and the rear lower end are connected to the sliding door (10) through a swing arm (32), and the swing arm (32) releases the Z-direction rotational freedom of the pulleys (31) at the rear upper end and the rear lower end. The slide rail, the pulley block and the swing arm jointly ensure the sliding stability and connection rigidity of the sliding door (10).

6. The sliding door structure with emergency exit according to claim 1, characterized in that: A ball socket support (70) is arranged at the top of the emergency exit passage (60) on the sliding door (10); a ball hinge (110) is installed at the top of the emergency door (20); the ball hinge (110) is inserted into the ball socket support (70) to cooperate with the front and rear and inside and outside positions of the emergency door (20) to limit the front and rear and inside and outside positions; the emergency door (20) can rotate in the ball socket support (70) around the rotation axis of the ball center connecting line of the front and rear ball hinges (110) and can fall down along the ball socket opening of the ball socket support (70).

7. The sliding door structure with emergency exit according to claim 1, characterized in that: The latch pin ejection mechanism (120) comprises: a latch pin (121), a bottom latch pin (122), a rocker arm (123), a pull rod (124), a spring pre-tensioning mechanism (125) and a limiting column (126); wherein the rocker arm (123) is fixedly connected to a handle (130), the rocker arm (123) is respectively connected to two front and rear latch pins (121) and the bottom latch pin (122) through a pull rod (124), and the rocker arm (123) is connected to the spring pre-tensioning mechanism (125); the spring pre-tensioning mechanism (125) pre-tensions the open and closed positions of the latch pin ejection mechanism (120), and the limiting column (126) limits the closed position of the latch pin ejection mechanism (120).

8. The sliding door structure with emergency exit according to claim 1, characterized in that: A first lock seat (80) is arranged on both sides of the bottom of the emergency exit passage (60) on the sliding door (10), and a second lock seat (90) and two front and rear sliders (100) are arranged on the bottom of the emergency exit passage (60); the two sides of the bottom of the emergency door (20) are inserted into the first lock seat (80) on the sliding door (10) through two front and rear latches (121) to limit the inside and outside positions; the bottom of the emergency door (20) is inserted into the lock seat (90) on the sliding door (10) through the bottom latch (122) to limit the front and rear positions; the slider (100) contacts the bottom inclined surface of the emergency door (20); the closed state of the latch (121) is an over-dead point state, and when the handle (130) is turned to throw, the latch (121) is first inserted into and then pulled out of the first lock seat (80).

9. The sliding door structure with emergency exit according to claim 1, characterized in that: The transparent protective cover plate (140) is mounted on the outer surface of the handle (130), and an easy-to-break hole is provided at the mounting screw position on the upper end of the transparent protective cover plate (140); and the interior trim plate (150) is mounted between the handle (130) and the latch ejection mechanism (120).

10. An emergency release method for the sliding door structure according to any one of claims 1 to 9, characterized in that: During emergency evacuation, the transparent protective cover plate (140) is first broken off to expose the handle (130); the handle (130) is rotated, and the handle (130) drives the rocker arm (123) to pull the front and rear two latches (121) and the bottom latch (122) out of the first lock seat (80) and the second lock seat (90); the handle (130) is pushed outward, and the ball head hinge (110) at the top of the emergency door (20) rotates around the ball center connection shaft of the front and rear ball socket supports (70), and the bottom inclined surface of the emergency door (20) slides out along the slider (100); the handle (130) is pushed downward to throw away the emergency door (20), and the emergency door (20) falls down along the ball socket opening of the ball socket support (70) under the action of gravity and thrust.

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