Double-opening sliding door system

Abstract

The present invention discloses a double-opening plug sliding door system, including: a load-bearing drive mechanism, a transmission mechanism, an auxiliary lock assembly, a lock hook, a door leaf, a door frame molding, etc. The load-bearing drive mechanism is connected to the door leaf and drives the door leaf to open and close. In the double-opening plug sliding door system provided by the present invention, the load-bearing drive mechanism is supported by linear guide rails and end rolling bearings arranged alternately up and down, and the structure is simple and space-saving. The auxiliary lock assembly on the side of the door system is linked with the locking device of the mechanism, and no additional power source is required, which saves energy consumption, occupies a small space, and has reliable locking. In addition, the upper movement trajectory of the door leaf is different from the lower movement trajectory. According to different movement trajectories, a variety of restraint devices are provided, so that the door system has multi-point constraints, and the door system has high load-bearing strength and good sealing performance.

Description

Technical Field

[0001] The invention relates to a double-opening plug sliding door system, belonging to the technical field of rail transportation devices. Background Art

[0002] Double-opening plug doors are widely used in subways and intercity vehicles. However, due to the fewer side restraint points of the door system, traditional subway plug doors have problems such as howling and shaking during operation. In order to meet the requirements of high-speed operation, intercity plug doors have pneumatic or electric locking devices added to the side of the door system.

[0003] Although the pneumatic or electric locking devices added to the sides of the existing door systems meet the strength and sealing requirements, the complex locking devices result in high cost, high energy consumption, large space occupation and difficult maintenance of the door systems.

[0004] In addition, the bearing drive mechanism of some subway and intercity sliding plug doors is large in size, which exceeds the opening range of the car body, occupies a large space, and affects the interior space and the appearance of the cover. Some sliding plug door bearing drive mechanisms are also small in size, but usually use multi-level guide rails or multiple bearing beams, and the structure is complicated. It can be seen that those skilled in the art are in urgent need of improving the structure of the existing double-opening sliding plug doors. Summary of the invention

[0005] Purpose: In order to overcome the deficiencies in the prior art, the present invention provides a double-opening plug sliding door system to overcome the problems of the existing door system, such as large space occupation, few or many side restraint points, complex structure, high energy consumption, and difficult installation and maintenance.

[0006] Technical solution: To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A double-opening plug sliding door system, comprising: a load-bearing driving mechanism, a transmission mechanism, an auxiliary lock assembly, a lock hook, a balancing roller, a door leaf, a door frame molding, a threshold, and a swing arm assembly;

[0008] The bearing drive mechanism is connected to the door leaf and drives the door leaf to open and close. The bearing drive mechanism is equipped with a left upper rail and a right upper rail, and the left upper rail and the right upper rail each include a straight line segment, a curved line segment, and a groove segment, and the straight line segment, the curved line segment, and the groove segment are connected in sequence;

[0009] The bearing drive mechanism is provided with a transmission plate, and a driving roller is provided on the transmission plate. The driving roller on the left transmission plate is movably connected to the left upper guide rail, and the driving roller on the right transmission plate is movably connected to the right upper guide rail. During the door leaf opening and closing process, the driving roller moves along the guide rail to control the movement trajectory of the upper part of the door leaf.

[0010] The lower part of the door leaf is provided with a lower guide rail, and swing arm assemblies are installed on both sides of the door system. The free end of the swing arm assembly is connected to a guide roller, and the guide roller is movably connected to the lower guide rail of the door leaf; during the opening and closing process of the door, the lower guide rail moves along the guide roller to control the movement trajectory of the lower part of the door leaf;

[0011] The lock hooks are installed at the lower sides of the door system, and the balancing rollers are installed at the upper part of the door system. In the final stage of closing the door leaf, the balancing wheel applies a downward force to the door leaf.

[0012] The auxiliary lock assembly is installed on the side of the door system, one end of the transmission mechanism is connected to the auxiliary lock assembly, and the other end is located on the bearing drive mechanism. The bearing drive mechanism drives the transmission mechanism to move during the rotation locking and unlocking process, and controls the locking and unlocking of the side locking assembly through the transmission mechanism.

[0013] The side of the door leaf is provided with a lock buckle. After the door leaf is closed, the auxiliary lock assembly and the lock hook are respectively engaged with the lock buckle on the door leaf to realize the constraint on the side of the door leaf.

[0014] A lower stop pin is arranged below the door leaf, and an insert block is installed on the threshold, the insert block has a stop pin groove, and after the door leaf is closed, the lower stop pin is engaged with the stop pin groove of the threshold insert block to realize the constraint on the lower part of the door leaf.

[0015] The door frame strips are installed on the upper part and both sides of the door system, and the door sill is installed at the bottom of the door system. The door leaf is surrounded by sealing strips, and after the door leaf is closed, the sealing strips are pressed tightly on the door frame strips and the door sill surface.

[0016] As a preferred solution, the bearing drive mechanism comprises: a bracket, a screw rod is arranged between two brackets, the screw rod is driven by a driving motor, two screw rod nuts are sleeved on the screw rod, one end of each screw rod nut is rotatably connected to one end of a transmission frame through a first shaft pin, the other end of the transmission frame is hinged to one end of a transmission plate, and the other end of the transmission plate is connected to a door carrying frame;

[0017] The two brackets are both provided with roller grooves, rolling bearings are movably connected in the roller grooves, a load-bearing beam is connected between the rolling bearings, an upper linear guide and a lower linear guide are provided on one side of the load-bearing beam, the upper linear guide and the lower linear guide are arranged in the upper and lower directions in the vertical direction, one door-carrying frame is connected to the upper slider of the upper linear guide, and the other door-carrying frame is connected to the upper slider of the lower linear guide; the free ends of the two door-carrying frames are respectively connected to the upper part of the door leaf;

[0018] As a preferred solution, the transmission mechanism includes a transmission shaft, a transmission fork is fixed on the transmission shaft, the transmission shaft is connected to one end of the first rotating arm, the other end of the first rotating arm is connected to one end of the first connecting rod, and the other end of the first connecting rod is connected to one end of the second rotating arm; a mounting block is also provided on the transmission shaft, a limiting column is provided on the mounting block, and the transmission fork contacts with the limiting column when resetting;

[0019] As a preferred embodiment, the auxiliary lock assembly includes a lock body, a rotatable lock fork is arranged in the lock body, a torsion spring is arranged in the lock fork, under the action of the torsion spring, the lock fork is initially in a reset state, and a second roller is arranged at the rear end of the lock fork; a rotating shaft is also arranged in the lock body, and an inner swing arm is installed on the rotating shaft. When the door leaf is closed, the lock fork is locked with the lock column on the side of the door leaf, and the rotating shaft drives the inner swing arm to rotate. When the inner swing arm rotates into place, the front end of the inner swing arm contacts the second roller, one end of the rotating shaft is connected to one end of the drive shaft through a universal joint, and the other end of the drive shaft is connected to the other end of the second rotating arm; the first shaft pin drives the transmission fork to rotate.

[0020] As a preferred solution, a bearing slideway is provided in the roller groove, and a rolling bearing is movably connected in the bearing slideway.

[0021] As a preferred solution, support rollers are provided at both ends of the rear end of the load-bearing beam, and the support rollers are movably connected to the inner side of the bracket.

[0022] As a preferred embodiment, the auxiliary lock assembly is provided in plurality, the end of the rotating shaft of each auxiliary lock assembly is connected to the driving shaft of the next auxiliary lock assembly through a universal joint, and the driving shaft of the first auxiliary lock assembly is connected to the second rotating arm.

[0023] As a preferred solution, an unlocking mechanism is further included, which includes an unlocking handle, which is rotatably connected to the transmission mechanism and is used to drive the transmission mechanism to move in the opposite direction. An unlocking elastic component is provided on the transmission mechanism for resetting the unlocking handle.

[0024] As a preferred embodiment, the transmission fork position maintaining mechanism includes: a mounting plate, a limiting link movably connected to the mounting plate, and an elastic component is sleeved on the limiting link; a rotating block is provided on the transmission shaft, the free end of the rotating block is rotatably connected to one end of the limiting link, and the elastic component is used to maintain the force in the rotation direction of the rotating block.

[0025] As a preferred solution, a double-lip or multi-lip sealing strip is installed on the door leaf to make the door system airtight.

[0026] Beneficial effects: The double-opening plug sliding door system provided by the present invention has multi-point constraints, the door system has high strength and good sealing performance, the load-bearing drive mechanism is loaded by linear guide rails and end rolling bearings arranged in an up-and-down staggered manner, the structure is simple, and space is saved, the door system is provided with a side auxiliary lock, the auxiliary lock is linked with the mechanism locking device, no additional power source is required, energy consumption is saved, and the space is small, and the locking is reliable. The side auxiliary lock assembly adopts a universal joint, and multiple auxiliary locks are connected on one side of the door system to meet different locking strength requirements. Multiple locking devices only need one driving source, and the structure is simple; the side auxiliary locking device is not only suitable for flat doors, but also for curved doors, with good versatility and convenient adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a double-opening plug sliding door system of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the bearing drive mechanism of the present invention;

[0029] Figure 3 is a cross-sectional schematic diagram of the bearing drive mechanism of the present invention;

[0030] Figure 4 is a top view of the structure of the door system of the present invention;

[0031] Figure 5 The transmission mechanism structure of the present invention is schematically shown in FIG. Figure 1 ;

[0032] Figure 6 The transmission mechanism structure of the present invention is schematically shown in FIG. Figure 2 ;

[0033] Figure 7 It is a schematic diagram of the structure of the auxiliary lock assembly of the present invention;

[0034] Figure 8 It is a schematic diagram of the lock body related structure of the present invention;

[0035] Fig. 9 It is a structural schematic diagram of the transmission fork position holding mechanism of the present invention;

[0036] Fig.10 is a schematic structural diagram of the unlocking mechanism of the present invention;

[0037] Fig.11 It is a front view structural diagram of the top balancing roller of the door system of the present invention;

[0038] Fig.12 It is a top view of the structure of the side lock hook of the door system of the present invention;

[0039] Fig.13 It is a schematic structural diagram of the lower stop pin at the lower part of the door system of the present invention;

[0040] Fig.14 is a schematic structural diagram of a lower swing arm assembly of a door system of the present invention;

[0041] Fig.15 It is a schematic diagram of the coordination of the bearing drive mechanism, the transmission mechanism, and the transmission fork position holding mechanism when the door leaf is in the closed / open state and the transmission fork is in the critical state of contacting / disengaging from the first shaft pin;

[0042] Fig.16 It is a schematic diagram of the coordination of the bearing drive mechanism, the transmission mechanism, and the transmission fork position holding mechanism after the door leaf is closed;

[0043] Fig.17 It is a schematic diagram of the cooperation between the lock column on the side of the door leaf and the lock fork of the auxiliary lock assembly in the critical state of contacting / disengaging the pin when the door leaf is closed / opened;

[0044] Fig.18 This is a schematic diagram of the cooperation between the lock column on the side of the door leaf and the lock fork of the auxiliary lock assembly when the door leaf is closed;

[0045] Fig.19 This is a schematic diagram of the coordination of the bearing drive mechanism, the transmission mechanism, and the transmission fork position holding mechanism after the transmission fork is disengaged when the door leaf is in the open state;

[0046] Fig. 20 It is a schematic diagram of the double-lip sealing strip of a door leaf of the present invention. DETAILED DESCRIPTION

[0047] The present invention will be further described below in conjunction with specific embodiments.

[0048] like Figure 1 As shown, a double-opening plug sliding door system of the present invention includes: a bearing drive mechanism 1, a transmission mechanism 2, an auxiliary lock assembly 3, and a door leaf 4. The bearing drive mechanism is connected to two door leaves to drive the door leaves to open and close. When the door leaves are opened and closed, the bearing drive mechanism drives the transmission mechanism to rotate to generate displacement to control the auxiliary lock assembly and the side of the door leaf to lock and unlock, thereby realizing multi-point constraint on the double-opening plug sliding door system.

[0049] like Figure 2-4As shown, the bearing drive mechanism 1 is located at the upper end of the door system, and the bearing drive mechanism 1 includes: a bracket 101, a screw rod 102 is arranged between the two brackets 101, one end of the screw rod 102 is connected to the driving motor 103 through a transmission belt, two screw rod nuts 104 are sleeved on the screw rod 102, one end of each screw rod nut 104 is rotatably connected to one end of a transmission frame 105 through a first shaft pin 106, the other end of the transmission frame 105 is hinged to one end of a transmission plate 107, and the other end of the transmission plate 107 is connected to a door carrying frame 108; the two brackets 101 are provided with rollers A bearing slide 109 is arranged in the roller groove, and a rolling bearing 110 is movably connected in the bearing slide 109. A load-bearing beam 111 is connected between the rolling bearings 110. An upper linear guide 112 and a lower linear guide 113 are arranged on one side of the load-bearing beam 111. The upper linear guide 112 and the lower linear guide 113 are arranged in the upper and lower directions in the vertical direction. One door-carrying frame 108 is connected to the upper slider of the upper linear guide 112, and the other door-carrying frame 108 is connected to the upper slider of the lower linear guide 113; the free ends of the two door-carrying frames 108 are respectively connected to the upper part of the door leaf 4. A driving roller 114 is arranged on the transmission plate 107; the driving roller on the left transmission plate is movably connected to the upper left guide rail 115, and the driving roller on the right transmission plate is movably connected to the upper right guide rail 116. During the opening and closing process of the door leaf 4, the driving roller moves along the guide rail to control the movement trajectory of the upper part of the door leaf, such as Fig.18 As shown in track I.

[0050] The upper left guide rail 115 and the upper right guide rail 116 both include a straight section 1151, a curved section 1152, and a groove section 1153. The straight section, the curved section, and the groove section are connected in sequence. When the driving roller moves to the end of the groove section, the door leaf is closed in place, and the transmission frame rotates and retracts; when the driving roller starts to move from the end of the groove section, the door leaf gradually opens through the curved section and the straight section, and the transmission frame rotates and opens. Support rollers 117 are provided at both ends of the load-bearing beam 110. The support rollers 117 are movably connected to the inner side of the bracket 101 to prevent the load-bearing beam from moving along the X direction.

[0051] During the door opening and closing process, the driving motor drives the lead screw to drive the door leaf to move in the X direction along the linear guide rail, and at the same time move in the Y direction along with the load-bearing beam, and realize the plugging action under the constraint of the upper guide rail.

[0052] like Figure 5-6As shown, the transmission mechanism 2 includes a transmission shaft 201, and both ends of the transmission shaft 201 are respectively connected to the bracket 101 for rotation. A transmission fork 202 is fixed on the transmission shaft 201, and the transmission fork 202 cooperates with one end of the first shaft pin 106. When the first shaft pin 106 rotates and retracts with the transmission frame 105, the transmission fork 202 rotates downward with the first shaft pin; when the first shaft pin rotates and opens with the transmission frame 105, the transmission fork 202 rotates upward with the first shaft pin until the transmission fork 202 is separated from the first shaft pin. The transmission shaft 201 is connected to one end of the first rotating arm 203, and the other end of the first rotating arm 203 is connected to one end of the first connecting rod 204, and the other end of the first connecting rod 204 is connected to one end of the second rotating arm 205. The transmission shaft 201 is also provided with a mounting block 206, and a limiting column 207 is provided on the mounting block 206. When the transmission fork 202 rotates upward, it contacts the limiting column 207.

[0053] like Figure 7-8 As shown, the auxiliary lock assembly 3 includes a lock body 301, a rotatable lock fork 302 is arranged in the lock body 301, a torsion spring 303 is arranged in the lock fork 302, under the action of the torsion spring 303, the lock fork 302 is initially in a reset state, and a second roller 304 is arranged at the rear end of the lock fork 302; a rotating shaft 305 is also arranged in the lock body 301, and an inner swing arm 306 is installed on the rotating shaft 305. When the door leaf is closed, the lock fork 302 is locked with the lock column 401 on the side of the door leaf 4, and the rotating shaft 305 drives the inner swing arm 306 to rotate. After the inner swing arm 306 rotates into place, the front end of the inner swing arm 306 contacts the second roller 304, and one end of the rotating shaft 305 is connected to one end of the driving shaft 307 through a universal joint, and the other end of the driving shaft 307 is connected to the other end of the second rotating arm 205.

[0054] like Fig. 9As shown, the transmission fork position holding mechanism 5 includes: a mounting plate 501, on which a limit link 502 is movably connected, and the limit link 502 is sleeved with an elastic component 503 such as a compression spring; a rotating block 504 is provided on the transmission shaft 201, and the free end of the rotating block 504 is rotatably connected to one end of the limit link 502. When the transmission fork 202 rotates upward, the rotating block 504 is driven to rotate, and the rotating block 504 drives the limit link 502 to rotate. The transmission fork 202 cannot continue to rotate upward due to the limit column 207, and at the same time, the elastic component 503 is stretched through the limit link 502 to maintain the rotating block 504 to continue to rotate upward, thereby ensuring that the transmission fork 202 is stationary. When the transmission fork 202 rotates downward, it drives the rotating block 504 to rotate, and the rotating block 504 drives the limiting link 502 to rotate. The rotating point of the transmission fork 202 has passed the maximum rotation position of the hinge between the transmission plate 107 and the transmission frame 105. Due to the lower limit, it cannot continue to rotate downward. At the same time, the elastic component 503 maintains the rotating block 504 through the limiting link 502 to continue to rotate and flip downward, ensuring that the transmission fork 202 is locked and motionless.

[0055] like Fig.10 As shown, the transmission mechanism 2 is provided with an unlocking mechanism 6, which includes an unlocking handle 601, which is rotatably connected to the transmission mechanism and used to drive the transmission mechanism to move in the opposite direction. The transmission mechanism is provided with an unlocking elastic component 602, which is used to reset the unlocking handle. The unlocking handle can be installed on any component of the transmission mechanism, such as the transmission shaft, the first transmission arm, the first connecting rod, etc., as long as it can drive one of the components to move in the opposite direction, so as to realize the rotation of the drive shaft to drive the auxiliary lock assembly to unlock. The unlocking elastic component, such as a torsion spring, is sleeved on the transmission shaft, and under the action of the torsion spring, it is ensured that the unlocking handle is in a reset state after being released.

[0056] like Figure 1 As shown, the top and both sides of the door system are provided with door frame moldings 7. The bottom of the door system is provided with a threshold 8. The door leaf 4 is surrounded by a sealing strip 9. After the door leaf is closed, the strip is pressed against the door frame molding and the threshold to achieve sealing.

[0057] like Fig.11 As shown, a balancing roller 10 is arranged above the door system, and a supporting screw 1130 is arranged on the balancing roller 10. The supporting screw 1130 can adjust the height of the balancing roller 10 and provide supporting force to the balancing roller. During the closing process of the door leaf, the balancing roller will provide a vertical downward restraining force to the top of the door leaf to prevent the lower part of the door leaf from separating to both sides.

[0058] like Fig.12 As shown, lock hooks 11 are provided at the lower parts of both sides of the door system. When the door leaf is closed, the lock hooks 11 and the lock buckles 402 on the door leaf enter the grooves of the lock hooks 11. When the door leaf is subjected to load, the lock hooks restrain the door leaf.

[0059] like Fig.13 As shown, a lower stop pin 12 is arranged under the door leaf 4, and an insert block 13 is installed on the threshold 8. The insert block 13 has a stop pin groove 14. After the door leaf is closed, the lower stop pin enters the stop pin groove of the threshold insert block, and when the door leaf is subjected to load, the lower part of the door leaf is restrained.

[0060] like Fig.14 As shown, a lower guide rail 15 is provided at the lower part of the door leaf 4, and swing arm assemblies 16 are provided on both sides of the door system. The free end of the swing arm assembly 16 is connected to a guide roller 17, and the guide roller is movably connected to the lower guide rail in the door leaf. During the door opening and closing process, the lower guide rail moves along the guide roller to control the movement trajectory of the lower part of the door leaf, as shown in FIG. Fig.12 As shown in track II, the door leaf slides along the upper guide rail and the lower guide rail under the drive of the bearing drive mechanism, thereby realizing the door opening and closing action.

[0061] Embodiment 1:

[0062] When the system is used, the tops of the two brackets carrying the driving mechanism are mounted on the mounting plate at the top of the vehicle body, and the bottom of the mounting plate is also fixed with the left upper rail and the right upper rail. One end of the lock body of the auxiliary lock assembly is mounted on the side of the vehicle body. The mounting plate of the transmission fork position holding mechanism is fixed to the mounting plate at the top of the vehicle body. The door frame pressure strip is mounted on the top and both sides of the door frame of the vehicle body, and the door sill is mounted on the bottom of the door frame of the vehicle body. The balancing roller is mounted on the mounting plate at the top of the vehicle body. One end of the lock hook is mounted on the side of the vehicle body. One end of the swing arm assembly is mounted on the side of the vehicle body.

[0063] Embodiment 2:

[0064] When the door leaf is closed, the motor drives the screw nut on the screw to move toward the middle, driving the roller to move from the straight section to the curved section. Constrained by the curved section, the screw nut drives the transmission frame to move toward the middle while rotating downward along the screw. Fig.15 As shown, until the first shaft pin contacts the transmission fork, driving the transmission fork to rotate downward, the transmission fork drives the transmission shaft to rotate, and drives the rotating block to rotate, and the rotating block drives the limit connecting rod to rotate. Fig.16 As shown, when the driving roller enters the groove section, the lead screw nut completes rotation, and the first shaft pin and the transmission fork stop rotating. Since the transmission plate and the transmission frame are hinged, and the transmission frame and the lead screw nut are hinged through the first shaft pin, the positions of the first shaft pin and the transmission fork are lower than the line connecting the hinge point of the transmission plate and the transmission frame and the center point of the lead screw, that is, they have passed the dead point. Moreover, the transmission fork is driven to the final position by the first pin shaft, and the first shaft pin and the transmission fork are locked below the dead point under the action of the transmission fork position holding mechanism, which can effectively hinder the outward pulling force and upward movement force of the door leaf transmitted through the transmission frame.

[0065] like Fig.17As shown in FIG. 1 , when the door leaf is closed, the lock column on the side of the door leaf contacts the lock fork, driving the lock fork to rotate, and the second roller also rotates until the door leaf is completely closed, as shown in FIG. Fig.18 As shown, the lock column and the lock fork are locked, and the second roller rotates into place. The transmission shaft rotates with the transmission fork, driving the first rotating arm, the first connecting rod, and the second rotating arm to rotate in sequence. The second rotating arm drives the driving shaft to rotate, and the driving shaft drives the rotating shaft to rotate through the universal joint. The rotating shaft drives the inner swing arm to rotate and contact the second roller. At this point, the locking of the lock fork and the lock column is completed. In addition, multiple auxiliary lock components can be connected in series through universal joints to achieve locking of multiple lock fork points on the door leaf.

[0066] At the same time, when the door leaf is closed, in order to ensure smooth movement, the support rollers arranged on both sides of the rear end of the load-bearing beam are movably connected to the inner side of the bracket arranged on the top of the vehicle body to prevent the load-bearing beam from moving in the X direction. At the same time, under the constraint of the guide rail and the bearing slideway on the load-bearing beam, smooth movement in the Y direction is ensured. Driven by the two door carriers, the two door leaves are closed to the middle, and the top of the door leaf is ensured to have a vertical downward constraint force through the downward pressure of the balance roller to prevent the lower part of the door leaf from separating to both sides. The lower part of the door leaf is movably connected to the lower guide rail of the door leaf through the guide roller at the free end of the swing arm assembly to ensure that the door leaf does not separate when moving. After the door leaf is closed, the side and bottom of the door leaf are constrained by the lock buckle and lock hook, the lower stop pin and the stop pin groove on the threshold, respectively, to further achieve multi-point constraint. In addition, the door leaf is sealed by the sealing strips around the door leaf in contact with the door frame strip and the threshold.

[0067] Embodiment 3:

[0068] When the door leaf is opened, the motor drives the screw nut on the screw rod to move. Due to the constraint of the groove segment, the screw nut drives the transmission frame to rotate upward, and drives the first shaft pin and the transmission fork to rotate upward. Since the transmission plate and the transmission frame are hinged, the transmission plate can remain stationary. Fig.15 As shown, until the transmission fork stops at the limit column, the first shaft pin is ready to disengage from the transmission fork, and the transmission fork rotates upward, driving the transmission shaft to rotate, and releasing the constraint of the inner swing arm on the second roller at the rear of the lock fork through the first rotating arm and other components, completing the unlocking of the auxiliary lock assembly. At the same time, the transmission fork remains stationary under the action of the transmission fork position holding mechanism.

[0069] like Fig.19 As shown, after the first pin shaft is disengaged from the transmission fork, the screw nut continues to rotate upward. In the curved section, the transmission frame flips while driving the door leaf to open to both sides through the transmission plate and the door carrying frame until the roller completes the curved section stroke and the screw nut completes the rotation. When the roller is in the straight section, the screw nut moves horizontally until the door leaf is fully opened.

[0070] like Fig.17As shown, when the door leaf is opened, in order to ensure smooth movement, the support rollers arranged at both ends of the load-bearing beam are movably connected to the inner side of the bracket installed on the top of the vehicle body to prevent the load-bearing beam from moving in the X direction. At the same time, under the constraint of the guide rail and the bearing slideway on the load-bearing beam, smooth movement in the Y direction is ensured. Driven by the two door carriers, the two door leaves are opened to both sides. The top of the door leaf is ensured to have a vertical downward constraint force through the downward pressure of the balance roller to prevent the lower part of the door leaf from separating to both sides. The lower part of the door leaf is movably connected to the lower guide rail of the door leaf through the guide roller at the free end of the swing arm assembly to ensure that the door leaf does not disengage when moving. The inner swing arm disengages from the second roller at the rear of the lock fork, and the lock column on the side of the door leaf is ready to withdraw from the lock fork. The lock fork is reset under the action of the torsion spring to complete the unlocking of the auxiliary lock assembly. At the same time, the lock buckle and the lower stop pin at the bottom of the door leaf are disengaged from the lock hook and the stop pin groove on the threshold respectively.

[0071] Embodiment 4:

[0072] When the side door needs to be unlocked manually, the unlocking handle is manually turned, and the unlocking handle drives the transmission shaft to rotate, and in turn drives the first rotating arm, the first connecting rod, and the second rotating arm to rotate, the second rotating arm drives the driving shaft to rotate, the driving shaft drives the rotating shaft to rotate, and the rotating shaft drives the inner swing arm to rotate and disengage from the second roller to release the limit of the lock fork. At the same time, the transmission shaft drives the transmission fork to rotate the transmission frame upward to release the dead point locking state. When the manual unlocking is completed, the door leaf can be manually opened outward, and the unlocking handle is reset under the action of the torsion spring.

[0073] Embodiment 5:

[0074] The door leaf is equipped with double lip sealing strips, such as Fig. 20 As shown, after the door leaf is closed, the rubber strip is pressed tightly against the door frame strip and the door threshold surface, making the door system airtight;

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-opening plug sliding door system, comprising: Carrying drive mechanism, transmission mechanism, auxiliary lock assembly, lock hook, balance roller, door leaf, door frame strip, door threshold, swing arm assembly; The bearing drive mechanism is connected to the door leaf and drives the door leaf to open and close; the bearing drive mechanism is equipped with an upper left guide rail and an upper right guide rail, and the upper left guide rail and the upper right guide rail each include a straight line segment, a curved line segment, and a groove segment, and the straight line segment, the curved line segment, and the groove segment are connected in sequence; The bearing drive mechanism is provided with a transmission plate, on which a driving roller is arranged. The driving roller on the left transmission plate is movably connected to the left upper guide rail, and the driving roller on the right transmission plate is movably connected to the right upper guide rail. During the opening and closing process of the door leaf, the driving roller moves along the guide rail to control the movement trajectory of the upper part of the door leaf. The lower part of the door leaf is provided with a lower guide rail, and swing arm assemblies are installed on both sides of the door system. The free end of the swing arm assembly is connected to a guide roller, and the guide roller is movably connected to the lower guide rail of the door leaf; during the opening and closing process of the door, the lower guide rail moves along the guide roller to control the movement trajectory of the lower part of the door leaf; The lock hooks are installed at the bottom of both sides of the door system, and the balancing rollers are installed at the top of the door system. In the final stage of closing the door leaf, the balancing rollers exert a downward force on the door leaf. The auxiliary lock assembly is installed on the side of the door system, one end of the transmission mechanism is connected to the auxiliary lock assembly, and the other end is located on the bearing drive mechanism; the bearing drive mechanism drives the transmission mechanism to move during the rotation locking and unlocking process, and controls the locking and unlocking of the side locking assembly through the transmission mechanism; The door leaf has a lock buckle on the side, and after the door leaf is closed, the lock fork of the auxiliary lock assembly is locked with the lock column on the side of the door leaf; A lower stop pin is arranged below the door leaf, and an insert block is installed on the threshold, the insert block has a stop pin groove, and after the door leaf is closed, the lower stop pin is engaged with the stop pin groove of the threshold insert block to realize the restraint of the lower part of the door leaf; The door frame moldings are installed on the upper part and both sides of the door system, and the door sill is installed on the lower part of the door system; The door leaf is provided with sealing strips around it, and after the door leaf is closed, the sealing strips are pressed tightly against the door frame molding and the door threshold surface; The bearing drive mechanism comprises: a bracket, a screw rod is arranged between two brackets, the screw rod is driven by a driving motor, two screw rod nuts are sleeved on the screw rod, one end of each screw rod nut is rotatably connected to one end of a transmission frame through a first shaft pin, the other end of the transmission frame is hinged to one end of a transmission plate, and the other end of the transmission plate is connected to a door carrying frame; The two brackets are both provided with roller grooves, rolling bearings are movably connected in the roller grooves, a load-bearing beam is connected between the rolling bearings, an upper linear guide and a lower linear guide are provided on one side of the load-bearing beam, the upper linear guide and the lower linear guide are arranged in the upper and lower directions in the vertical direction, one door-carrying frame is connected to the upper slider of the upper linear guide, and the other door-carrying frame is connected to the upper slider of the lower linear guide; the free ends of the two door-carrying frames are respectively connected to the upper part of the door leaf; The transmission mechanism includes a transmission shaft, both ends of the transmission shaft are installed on the mechanism bracket, a transmission fork is fixed on the transmission shaft, the transmission shaft is connected to one end of the first rotating arm, the other end of the first rotating arm is connected to one end of the first connecting rod, and the other end of the first connecting rod is connected to one end of the second rotating arm; the middle part of the transmission shaft is installed on the mounting block, a limiting column is arranged on the mounting block, and the transmission fork contacts with the limiting column when resetting.

2. A double-opening plug sliding door system according to claim 1, characterized in that: The auxiliary lock assembly includes a lock body, a rotatable lock fork is provided in the lock body, a torsion spring is provided in the lock fork, under the action of the torsion spring, the lock fork is initially in a reset state, and a second roller is provided at the rear end of the lock fork; a rotating shaft is also provided in the lock body, and an inner swing arm is installed on the rotating shaft. When the door leaf is closed, the lock fork is locked with the lock column on the side of the door leaf, and the rotating shaft drives the inner swing arm to rotate. When the inner swing arm rotates into place, the front end of the inner swing arm contacts the second roller, one end of the rotating shaft is connected to one end of the drive shaft through a universal joint, and the other end of the drive shaft is connected to the other end of the second rotating arm; the first shaft pin drives the transmission fork to rotate.

3. A double-opening plug sliding door system according to claim 1, characterized in that: A bearing slideway is arranged in the roller groove, and a rolling bearing is movably connected in the bearing slideway.

4. A double-opening plug sliding door system according to claim 1, characterized in that: Support rollers are arranged at both ends of the load-bearing beam, and the support rollers are movably connected to the inner side of the bracket.

5. The double-opening sliding door system according to claim 1, characterized in that: The auxiliary lock assembly is provided in plurality, and the end of the rotating shaft of each auxiliary lock assembly is connected to the driving shaft of the next auxiliary lock assembly through a universal joint, and the driving shaft of the first auxiliary lock assembly is connected to the second rotating arm.

6. A double-opening plug sliding door system according to claim 1, characterized in that: It also includes an unlocking mechanism, which includes an unlocking handle. The unlocking handle is rotatably connected to the transmission mechanism and is used to drive the transmission mechanism to move in the opposite direction. The transmission mechanism is provided with an unlocking elastic component for resetting the unlocking handle.

7. The double-opening sliding door system according to claim 1, characterized in that: It also includes a transmission fork position holding mechanism, which includes: a mounting plate, a limit link movably connected to the mounting plate, and an elastic component is sleeved on the limit link; a rotating block is provided on the transmission shaft, and the free end of the rotating block is rotatably connected to one end of the limit link, and the elastic component is used to maintain the force in the rotation direction of the rotating block.

8. The double-opening sliding door system according to claim 1, characterized in that: The sealing strip adopts a double-lip or multi-lip sealing strip, so that the door system has an airtight function.

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