Single-leaf sliding plug door system

Abstract

A single-leaf sliding plug door system, comprising a door leaf (2) and a door frame, wherein a mounting lock assembly and a bearing and driving mechanism (1) are provided on the door frame; a driving electric motor (1-3-1) of the bearing and driving mechanism (1) is configured to drive a lead screw (1-3-2) to rotate, a transmission frame (1-3-4) is driven by the lead screw (1-3-2) to move in the axial direction of the lead screw (1-3-2), a lead screw (1-3-3) nut rotates, and then a transmission plate (1-3-5) is driven by the transmission frame (1-3-4) to move along an upper guide rail (1-2); the door leaf (2) is connected to the transmission plate (1-3-5), and is driven by the transmission plate (1-3-5) to perform push and pull actions along the upper guide rail (1-2); and the mounting lock assembly is arranged on two sides of the door frame, and comprises a lock hook (6-1 / 7-1), which is driven by the lead screw nut (1-3-3) to rotate and fits with a lock catch (2-4 / 2-5) arranged on the door leaf (2). In the single-leaf sliding plug door system, an auxiliary latching structure is linked with pushing and pulling actions for the door leaf, and the pushing and pulling actions for the door leaf and unlocking and locking actions for the auxiliary latching structure can be completed at the same time by means of the single power source of the bearing and driving mechanism, and thus power sources are saved on and the energy consumption is reduced; moreover, costs are reduced and the structure is simplified.

Description

Single sliding door system Technical Field

[0001] The present invention relates to the technical field of rail transit vehicles, and in particular to a single-opening plug sliding door system. Background Art

[0002] The single-opening plug door system refers to a door system that opens or closes the vehicle door by pulling the door leaf out or inserting it into the vehicle body. It is mainly used in intercity trains or high-speed trains.

[0003] Due to safety considerations of intercity trains or high-speed trains, the door leaves are usually heavy. Therefore, the sliding action of the door leaves requires the vehicle to be equipped with a strong power source to drive the main locking structure that implements the sliding action of the door leaves. At the same time, there is also an auxiliary locking structure that requires other power sources to drive, which leads to the disadvantages of the sliding door system such as high cost and energy consumption, large space occupation, and complex structure.

[0004] On the basis of ensuring necessary performance such as safety and reliability, lightweight, low cost, compactness and simplified structure are the inevitable development trends of single-opening plug sliding door systems, which are difficult to meet with existing single-opening plug sliding door systems. Summary of the Invention

[0005] Purpose of the invention: The present invention provides a single-opening plug sliding door system, which aims to solve the technical problems existing in the existing single-opening plug sliding door system, including the high cost and energy consumption, large space occupation, and complex structure caused by the need for multiple power sources to drive the plug structure and the locking structure.

[0006] Technical solution: The present invention provides a single-opening plug sliding door system, including a door leaf and a door frame, wherein the door frame is provided with an installation lock assembly and a bearing drive mechanism, wherein: the bearing drive mechanism includes an upper guide rail and a driving mechanism, and the driving mechanism includes a driving motor, a screw rod, a screw rod nut, a transmission frame and a transmission plate; the driving motor is used to drive the screw rod to rotate, and under the drive of the screw rod, the transmission frame moves along the axial direction of the screw rod, the screw rod nut rotates, and the transmission plate moves along the upper guide rail under the drive of the transmission frame; the upper guide rail includes a first part and a second part, the first part is an arc, and the second part is a straight line; the door leaf is connected to the transmission plate and performs a plugging action along the upper guide rail under the drive of the transmission plate; the installation lock assembly is arranged on both sides of the door frame, and includes a lock hook, the lock hook rotates under the drive of the screw rod nut, and the lock hook cooperates with a lock catch arranged on the door leaf. During the door opening process, the lock hook rotates to the unlocking position to release the lock catch. During the door closing process, the lock catch enters the groove of the lock hook, and the lock hook rotates to the locking position to limit the release of the lock catch.

[0007] Specifically, the load-bearing driving mechanism also includes a load-bearing beam and hangers arranged on both sides of the load-bearing beam, and the hangers are respectively provided with bearing slides. Load-bearing bracket assemblies are provided on both sides of the load-bearing beam, and the bearings on the load-bearing bracket assemblies are provided in corresponding bearing slides; a linear slide rail is provided on the load-bearing beam, and the door leaf is connected to the transmission plate through the linear slide rail; the transmission plate drives the door leaf to perform a plugging action along the linear slide rail and the upper guide rail, and in the process of the transmission plate moving along the arc part of the upper guide rail, it drives the load-bearing beam to move along the bearing slide.

[0008] Specifically, the driving mechanism also includes a roller guide shaft, a locking fork, an outer swing rod and a shift fork synchronization assembly, the roller guide shaft contacts the screw nut and the locking fork respectively, the locking fork clamps the shift fork synchronization assembly, and the outer swing rod is respectively arranged at both ends of the shift fork synchronization assembly; the mounting lock assembly includes a transmission shaft and a lock hook rotating shaft; the outer swing rod is connected to the transmission shaft of the mounting lock assembly through a connecting rod and an upper rotating arm; the roller guide shaft rotates under the drive of the screw nut, and the roller guide shaft drives the shift fork synchronization assembly and the outer swing rod to rotate synchronously through the locking fork, and the outer swing rod drives the transmission shaft to rotate through the connecting rod and the upper rotating arm, and the transmission shaft drives the lock hook rotating shaft to rotate, and the lock hook rotates with the rotation of the lock hook rotating shaft.

[0009] Specifically, a cam is provided on the fork synchronization assembly, and a corresponding roller is provided on the supporting bracket assembly on one side of the arc portion of the upper guide rail; during the door closing process, the cam and the fork synchronization assembly rotate synchronously, and when the cam pushes the roller to cross the step of the hanger through rotation, the roller of the supporting bracket assembly limits the pulling-out action of the door leaf.

[0010] Specifically, the installation lock assembly includes an upper lock hook, a lower lock hook, an upper transmission shaft and a lower transmission shaft. The upper lock hook and the lower lock hook are respectively arranged on the upper and lower sides of the door frame. The upper transmission shaft is respectively connected to the upper rotating arm and the lock hook rotating shaft of the upper lock hook, and the lower transmission shaft is respectively connected to the lock hook rotating shaft of the upper lock hook and the lock hook rotating shaft of the lower lock hook.

[0011] Specifically, the mounting lock assembly further includes a universal joint, and the lock hook rotating shaft of the upper lock hook is respectively connected to the upper transmission shaft and the lower transmission shaft through the universal joint.

[0012] Specifically, a return torsion spring is provided on the lock hook, which is used to keep the lock hook in the locked position through elastic action.

[0013] Specifically, the load-bearing drive mechanism further includes a door-carrying frame, and the door leaf is connected to the transmission plate via the door-carrying frame.

[0014] Specifically, a lower guide rail is provided on the door leaf, a left swing arm assembly is provided on the door frame, a guide rail roller is provided on the left swing arm assembly, and the guide rail roller cooperates with the lower guide rail.

[0015] Specifically, a roller restraint assembly is provided on the door leaf, and the roller restraint assembly includes a restraint roller and a corresponding roller bracket, which is used to restrain the roller from rolling against the vehicle body during the process of closing the door.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the auxiliary locking structure and the door leaf plug pulling action are linked, and the door leaf plug pulling action and the opening and closing actions of the auxiliary locking structure can be completed simultaneously by a power source of the carrying drive mechanism, which saves power source and reduces energy consumption while reducing costs and simplifying the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic structural diagram of a single-opening plug sliding door system provided by the present invention;

[0018] Figures 2(a) and 2(b) are schematic diagrams of the sealing structure of the single-opening plug sliding door system provided by the present invention;

[0019] FIG3 is a schematic structural diagram of a left swing arm assembly of a single-opening plug sliding door system provided by the present invention;

[0020] FIG4(a) and FIG4(b) are schematic structural diagrams of the installation lock components on both sides of the single-opening plug sliding door system provided by the present invention;

[0021] FIG5(a) and FIG5(b) are schematic structural diagrams of the position limiting components on both sides of the single-opening plug sliding door system provided by the present invention;

[0022] FIG6 is a schematic structural diagram of a bearing drive mechanism of a single-opening plug sliding door system provided by the present invention;

[0023] FIG7 is a schematic structural diagram of the upper guide rail of the single-opening plug sliding door system provided by the present invention;

[0024] FIG8 is a cross-sectional view of the load-bearing drive mechanism of the single-opening plug sliding door system provided by the present invention in a locked state;

[0025] FIG9 is a schematic diagram of a partial structure of a single-opening plug sliding door system provided by the present invention;

[0026] FIG10 is a schematic diagram of a partial structure of an auxiliary lock of a single-opening plug sliding door system provided by the present invention;

[0027] FIG11 is a schematic structural diagram of the auxiliary locks on both sides of the single-opening plug sliding door system provided by the present invention;

[0028] FIG12( a ) and FIG12( b ) are schematic diagrams showing the locked state of the auxiliary locks on both sides of the single-opening plug sliding door system provided by the present invention; Carrying drive mechanism 1, door carrier 1-1, upper guide rail 1-2, driving mechanism 1-3, carrying beam 1-4, left hanger 1-5, right hanger 1-6, left bearing bracket assembly 1-7, right bearing bracket assembly 1-8, shift fork synchronization assembly 1-9, driving motor 1-3-1, screw 1-3-2, screw nut 1-3-3, transmission frame 1-3-4, transmission plate 1-3-5, linear guide 1-4-1, bearing slide 1-5-1 / 1-6-1, bearing 1-7-1 / 1-8-1, locking fork 1-9-1, cam 1-9-2, outer swing arm 1-9-3, roller guide shaft 1-3-3-1, roller 1-3-5-1, door leaf 2, lower guide rail 2-1, sealing strip 2-2, roller constraint assembly 2-3, constraint roller 2-3-1, roller bracket 2- 3-2, lock buckle 2-4 / 2-5, limit bracket 2-6 / 2-7, upper pressure strip welding part 3, rear pressure strip welding part 4, front pressure strip welding part 5, rear mounting lock assembly 6, front mounting lock assembly 7, lock hook 6-1 / 7-1, inner swing arm 6-2 / 7-2, return torsion spring 6-3 / 7-3, limit assembly 8, left swing arm assembly 9, guide roller 9-1, rear synchronization rod assembly 10, front synchronization rod assembly 11, upper transmission shaft 10-1 / 11-1, lower transmission shaft 10-2 / 11-2, universal joint 10-3 / 11-3, door sill 12, isolation unlocking device 13, in-vehicle emergency unlocking device 14, electric key switch 15, in-vehicle button 16, external operating device 17, front connecting rod 18, rear connecting rod 19, front upper rotating arm 20, rear upper rotating arm 21. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0030] Refer to Figure 1, which is a structural schematic diagram of the single-opening plug sliding door system provided by the present invention, refer to Figure 6, which is a structural schematic diagram of the bearing drive mechanism of the single-opening plug sliding door system provided by the present invention, refer to Figure 4(a) and Figure 4(b), which are structural schematic diagrams of the installation lock components on both sides of the single-opening plug sliding door system provided by the present invention.

[0031] The present invention provides a single-opening plug sliding door system, including a door leaf 2 and a door frame, wherein the door frame 2 is provided with a mounting lock assembly and a bearing drive mechanism 1, wherein: the bearing drive mechanism 1 includes an upper guide rail 1-2 and a drive mechanism 1-3, the drive mechanism 1-3 includes a drive motor 1-3-1, a screw rod 1-3-2, a screw rod nut 1-3-3 and a transmission frame 1-3-4 and a transmission plate 1-3-5; the drive motor 1-3-1 is used to drive the screw rod 1-3-2 to rotate, and under the drive of the screw rod, the transmission frame 1-3-4 moves axially along the screw rod 1-3-2, the screw rod nut 1-3-3 rotates, and the transmission plate 1-3-5 is driven by the screw rod. The plate 1-3-5 moves along the upper guide rail under the drive of the transmission frame 1-3-4; the upper guide rail includes a first part and a second part, the first part is an arc, and the second part is a straight line; the door leaf is connected to the transmission plate 1-3-5, and performs a plugging action along the upper guide rail under the drive of the transmission plate; the installation lock assembly is arranged on both sides of the door frame, including a lock hook, which rotates under the drive of the screw nut, and the lock hook cooperates with the lock buckle arranged on the door leaf. During the door opening process, the lock hook rotates to the unlocking position to release the lock buckle. During the door closing process, the lock buckle enters the groove of the lock hook, and the lock hook rotates to the locking position to limit the release of the lock buckle.

[0032] In a specific implementation, referring to FIG4 , the mounting lock assembly can specifically include a front mounting lock assembly 7 and a rear mounting lock assembly 6, which are respectively arranged on both sides of the door frame. In the locked state, the front lock catch 2-4 and the rear lock catch 2-5 are respectively located in the grooves of the lock hook 7-1 of the front mounting lock assembly 7 and the lock hook 6-1 of the rear mounting lock assembly 6. The pulling out of the door leaf will drive the lock catch on the door leaf to move outward. However, in the position shown in FIG4 , that is, in the locked position, the lock hook can limit the lock catch from moving outward, confining the lock catch in its groove, thereby limiting the pulling out of the door leaf 2. During the door opening process, when the screw nut 1-3-3 drives the lock hooks 6-1 and 7-1 to rotate, the lock catches 2-4 and 2-5 can move outward, and the door leaf can be pulled out. The mounting lock assembly and the lock catch form the auxiliary lock structure of the present invention.

[0033] In a specific implementation, referring to FIG6 , the track of the upper guide rail 1-2 is divided into an arc portion and a straight portion. When the transmission frame 1-3-4 moves along the arc portion, it can drive the door leaf to move in the arc direction at the same time, so as to pull the door leaf out of or insert the door leaf into the vehicle body. When the transmission frame 1-3-4 moves along the straight portion, it can drive the door leaf to move in the straight direction at the same time, so as to pull the door leaf out and move it to one side of the vehicle body, or move the door leaf from one side of the vehicle body to the position to be inserted into the vehicle body.

[0034] In a specific implementation, the screw 1-3-2 of the bearing drive mechanism 1 can simultaneously drive the transmission plate 1-3-5 and the screw nut. When the door leaf 2 is inserted into the vehicle body, driven by the transmission plate, the lock hook of the mounting lock assembly, driven by the screw nut, simultaneously rotates to the locked position. When the door leaf is fully inserted into the vehicle body, the lock catch enters the groove of the lock hook, and the lock hook is in the locked position. In other words, the insertion action and the locking action of the auxiliary lock structure are simultaneously driven by a single power source. The same principle applies to the door leaf pulling out action. The lock hook rotates to the unlocked position to release the lock catch, and the door leaf is pulled out of the vehicle body under the drive of the transmission plate.

[0035] Refer to FIG7 , which is a schematic structural diagram of the upper guide rail of the single-opening plug sliding door system provided by the present invention.

[0036] In a specific implementation, a roller 1-3-5-1 is installed on the transmission plate 1-3-5, and the roller is sleeved in the upper guide rail 1-2. During the door opening and closing process, the roller 1-3-5-1 rolls along the upper guide rail 1-2.

[0037] In specific implementation, the structure provided by the present invention can carry the driving mechanism 1 through a single power source, and simultaneously complete the door pulling action and the auxiliary lock opening and closing action, while saving power source and reducing energy consumption, reducing costs and simplifying the structure.

[0038] In an embodiment of the present invention, the bearing drive mechanism 1 also includes a bearing beam 1-4, and hangers arranged on both sides of the bearing beam 1-4, and bearing slides are respectively provided on the hangers. Bearing bracket assemblies are provided on both sides of the bearing beam 1-4, and the bearings on the bearing bracket assemblies are provided in corresponding bearing slides; a linear slide rail is provided on the bearing beam 1-4, and the door leaf is connected to the transmission plate through the linear slide rail; the transmission plate drives the door leaf to perform a plugging action along the linear slide rail and the upper guide rail 1-2, and in the process of the transmission plate moving along the arc portion of the upper guide rail 1-2, it drives the bearing beam 1-4 to move along the bearing slide.

[0039] In a specific implementation, referring to Figures 6 and 8, the load-bearing bracket assembly includes a left load-bearing bracket assembly 1-7 and a right load-bearing bracket assembly 1-8 arranged on both sides of the load-bearing beam 1-4, and the bearings 1-7-1 and 1-8-1 on the two load-bearing bracket assemblies are respectively arranged on the bearing slide 1-5-1 of the left hanger 1-5 and the bearing slide 1-6-1 of the right hanger 1-6. The load-bearing beam 1-4 and the hangers 1-5 and 1-6 on both sides thereof are connected and matched through bearings and bearing slides.

[0040] In a specific implementation, the bearing slides 1-5-1 and 1-6-1 are usually set to be substantially perpendicular to the direction of the vehicle body. The bearing slides limit the bearings, thereby limiting the movement of the left load-bearing bracket assembly 1-7 and the right load-bearing bracket assembly 1-8 on both sides of the load-bearing beam 1-4, and finally limit the load-bearing beam 1-4 to move only along the bearing slides. That is, when the transmission plate moves on the arc part of the upper guide rail, the load-bearing beam 1-4 moves accordingly in a direction substantially perpendicular to the vehicle body, pulled out of or inserted into the vehicle body, and assists the door leaf 2 in being pulled out of and inserted into the vehicle body. However, due to the limitation of the bearing slides, the load-bearing beam 1-4 cannot move in the direction along the vehicle body. The door leaf 2 can move along the linear guide rail 1-4-1 on the load-bearing beam 1-4 while being pulled out of and inserted into the vehicle body.

[0041] Refer to FIG9 , which is a partial structural diagram of the single-opening plug sliding door system provided by the present invention; refer to FIG10 , which is a partial structural diagram of the auxiliary lock of the single-opening plug sliding door system provided by the present invention.

[0042] In an embodiment of the present invention, the driving mechanism also includes a roller guide shaft 1-3-3-1, a locking fork 1-9-1, an outer swing rod 1-9-3 and a shift fork synchronization assembly 1-9, the roller guide shaft is in contact with the screw nut 1-3-3 and the locking fork 1-9-1 respectively, the locking fork 1-9-1 clamps the shift fork synchronization assembly 1-9, and the outer swing rod is respectively arranged at both ends of the shift fork synchronization assembly 1-9; the mounting lock assembly includes a transmission shaft and a lock hook shaft; the outer swing rod is connected to the transmission shaft of the mounting lock assembly through a connecting rod 18 / 19 and an upper rotating arm 20 / 21; the roller guide shaft rotates under the drive of the screw nut 1-3-3, the roller guide shaft drives the shift fork synchronization assembly 1-9 and the outer swing rod to rotate synchronously through the locking fork, the outer swing rod drives the transmission shaft to rotate through the connecting rod 18 / 19 and the upper rotating arm 20 / 21, the transmission shaft drives the lock hook shaft to rotate, and the lock hook rotates with the rotation of the lock hook shaft.

[0043] In practice, roller guide shaft 1-3-3-1 rotates concentrically with lead screw nut 1-3-3, driving lock fork 1-9-1 to flip upward, which in turn rotates shift fork synchronization assembly 1-9, and in turn, the outer swing arms 1-9-3 at both ends rotate synchronously. The outer swing arms 1-9-3 are further connected to the front upper rotating arm 20 on the right side of door leaf 2 and the rear upper rotating arm 21 on the left side of door leaf 2 via the front connecting rod 18 and rear connecting rod 19 on either side, respectively.

[0044] In an embodiment of the present invention, a cam 1-9-2 is provided on the fork synchronization assembly, and a corresponding roller is provided on the supporting bracket assembly on one side of the arc portion of the upper guide rail; during the door closing process, the cam 1-9-2 rotates synchronously with the fork synchronization assembly, and when the cam pushes the roller to cross the step of the bracket by rotation, the roller of the supporting bracket assembly limits the pulling-out action of the door leaf 2.

[0045] In specific implementations, referring to Figures 6, 9, and 10, a roller is mounted on the right support bracket assembly 1-8 (the support bracket assembly on the curved portion of the upper guide rail) and engages with a cam 1-9-2 on the corresponding shift fork synchronization assembly. During door closing, the cam rotates to push the roller over the step on the bracket, whereupon the roller abuts against the step on the right side bracket 1-6, locking the door. During door opening, the cam 1-9-2 rotates in the opposite direction, pushing the roller off the bracket step to unlock the door.

[0046] Refer to Figure 11, which is a structural schematic diagram of the auxiliary locks on both sides of the single-opening plug sliding door system provided by the present invention, and refer to Figure 12(a) and Figure 12(b), which are schematic diagrams of the locked states of the auxiliary locks on both sides of the single-opening plug sliding door system provided by the present invention.

[0047] In an embodiment of the present invention, the installation lock assembly includes an upper lock hook, a lower lock hook, an upper transmission shaft 10-1 and 11-1, and a lower transmission shaft 10-2 and 11-2. The upper lock hook and the lower lock hook are respectively arranged on the upper and lower sides of the door frame. The two ends of the upper transmission shaft are respectively connected to the upper rotating arm and the lock hook rotating shaft of the upper lock hook, and the two ends of the lower transmission shaft are respectively connected to the lock hook rotating shaft of the upper lock hook and the lock hook rotating shaft of the lower lock hook.

[0048] In an embodiment of the present invention, the mounting lock assembly further comprises a universal joint, and the lock hook shaft of the upper lock hook is respectively connected to the upper transmission shaft 10-1 / 11-1 and the lower transmission shaft 10-2 / 11-2 via the universal joint 10-3 / 11-3.

[0049] In the embodiment of the present invention, a return torsion spring 6-3 / 7-3 is provided on the locking hook 6-1 / 7-1, which is used to keep the locking hook 6-1 / 7-1 in the locked position through elastic action.

[0050] In a specific implementation, the rear synchronization rod assembly 10 and the front synchronization rod assembly 11 include an upper transmission shaft 10 - 1 / 11 - 1 and a lower transmission shaft 10 - 2 / 11 - 2 , respectively.

[0051] In a specific implementation, inner swing arms 7-2 and 6-2 are respectively installed on the rotating shafts of the front-mounted lock assembly 7 and the rear-mounted lock assembly 6 on both sides, and the inner swing arms 6-2 / 7-2 can rotate together with the lock hook rotating shaft.

[0052] In practice, the auxiliary lock structure is adjusted horizontally, i.e., by adjusting the relative positions of the lock hooks 6-1 and 7-1 and the lock catches 2-5 and 2-4, thereby adjusting the tightness of the fit between the lock hooks and the door lock catches. Thanks to the use of universal joints 10-3 and 11-3, the auxiliary lock structure can be adjusted horizontally without affecting its normal operation, making it very convenient.

[0053] In an embodiment of the present invention, the bearing drive mechanism further includes a door carrying frame 1-1, and the door leaf is connected to the transmission plate via the door carrying frame 1-1.

[0054] Refer to FIG3 , which is a schematic structural diagram of the left swing arm assembly of the single-opening plug sliding door system provided by the present invention.

[0055] In the embodiment of the present invention, a lower guide rail 2-1 is provided on the door leaf, a left swing arm assembly 9 is provided on the door frame, a guide rail roller 9-1 is provided on the left swing arm assembly 9, and the guide rail roller 9-1 cooperates with the lower guide rail 2-1.

[0056] In a specific implementation, the door leaf slides along the upper guide rail 1-2 and the lower guide rail 2-1 under the drive of the bearing drive mechanism, thereby realizing the door opening and closing action.

[0057] In an embodiment of the present invention, a roller restraint assembly 2-3 is provided on the door leaf. The roller restraint assembly 2-3 includes a restraint roller 2-3-1 and a corresponding roller bracket 2-3-2, which is used to restrain the roller 2-3-1 from rolling against the vehicle body during the door closing process.

[0058] In a specific implementation, the roller bracket 2-3-2 provides support force to the constraint roller 2-3-1. During the closing process of the door leaf, the constraint roller 2-3-1 will provide a constraint force to the door leaf perpendicular to the vehicle body to prevent the door leaf from swinging.

[0059] Referring to Figures 1 and 2 , the upper bead weldment 3, rear bead weldment 4, and front bead weldment 5 are mounted on the upper, left, and right sides of the door frame, respectively. The door sill 12 is mounted below the door frame. Door leaf 2 is surrounded by sealing strips 2-2. When the door leaf is closed, the strips press against the upper bead weldment 3 and the door sill 12, creating a seal.

[0060] Referring to Figures 5(a) and 5(b), limiting components 8 are respectively provided on the upper and lower sides of the front pressure strip welding part 5, and limiting brackets 2-6 and limiting brackets 2-7 are respectively provided on the upper and lower sides of the door leaf 2. After the door leaf is closed, the limiting component 8 contacts the limiting brackets 2-6 and limiting brackets 2-7, and when the door leaf is subjected to load, the door leaf is restrained.

[0061] In a specific implementation, the single-opening plug door system is also provided with an isolation unlocking device 13, an in-vehicle emergency unlocking device 14, an electric key switch 15, an in-vehicle button 16 and an external operating device 17.

Claims

1. A single-opening plug sliding door system, characterized in that: It comprises a door leaf and a door frame, wherein the door frame is provided with a mounting lock assembly and a bearing drive mechanism, wherein: The bearing drive mechanism comprises an upper guide rail and a drive mechanism, wherein the drive mechanism comprises a drive motor, a screw rod, a screw rod nut, a transmission frame and a transmission plate; the drive motor is used to drive the screw rod to rotate, and under the drive of the screw rod, the transmission frame moves along the axial direction of the screw rod, the screw rod nut rotates, and the transmission plate moves along the upper guide rail under the drive of the transmission frame; the upper guide rail comprises a first part and a second part, the first part is an arc, and the second part is a straight line; The door leaf is connected to the transmission plate and is driven by the transmission plate to perform a plugging action along the upper guide rail; The installation lock assembly is arranged on both sides of the door frame, and includes a lock hook. The lock hook rotates under the drive of the screw nut, and the lock hook cooperates with a lock buckle arranged on the door leaf. During the door opening process, the lock hook rotates to the unlocking position to release the lock buckle. During the door closing process, the lock buckle enters the groove of the lock hook, and the lock hook rotates to the locking position to limit the release of the lock buckle.

2. The single-opening plug sliding door system according to claim 1, characterized in that: The load-bearing driving mechanism also includes a load-bearing beam and hangers arranged on both sides of the load-bearing beam, and bearing slides are respectively arranged on the hangers. Load-bearing bracket assemblies are arranged on both sides of the load-bearing beam, and the bearings on the load-bearing bracket assemblies are arranged in corresponding bearing slides; a linear slide rail is arranged on the load-bearing beam, and the door leaf is connected to the transmission plate through the linear slide rail; the transmission plate drives the door leaf to perform a plugging action along the linear slide rail and the upper guide rail, and in the process of the transmission plate moving along the arc part of the upper guide rail, it drives the load-bearing beam to move along the bearing slide.

3. The single-opening plug sliding door system according to claim 1, characterized in that: The driving mechanism also includes a roller guide shaft, a locking fork, an outer swing rod and a shift fork synchronization assembly, the roller guide shaft is in contact with the screw nut and the locking fork respectively, the locking fork clamps the shift fork synchronization assembly, and the outer swing rod is respectively arranged at both ends of the shift fork synchronization assembly; the mounting lock assembly includes a transmission shaft and a lock hook rotating shaft; the outer swing rod is connected to the transmission shaft of the mounting lock assembly through a connecting rod and an upper rotating arm; the roller guide shaft rotates under the drive of the screw nut, the roller guide shaft drives the shift fork synchronization assembly and the outer swing rod to rotate synchronously through the locking fork, the outer swing rod drives the transmission shaft to rotate through the connecting rod and the upper rotating arm, the transmission shaft drives the lock hook rotating shaft to rotate, and the lock hook rotates with the rotation of the lock hook rotating shaft.

4. The single-opening plug sliding door system according to claim 3, characterized in that: A cam is provided on the fork synchronization assembly, and a corresponding roller is provided on the bearing bracket assembly on one side of the arc portion of the upper guide rail; during the door closing process, the cam and the fork synchronization assembly rotate synchronously, and when the cam pushes the roller to cross the step of the bracket by rotation, the roller of the bearing bracket assembly limits the pulling-out action of the door leaf.

5. The single-opening plug sliding door system according to claim 3, characterized in that: The installation lock assembly includes an upper lock hook, a lower lock hook, an upper transmission shaft and a lower transmission shaft. The upper lock hook and the lower lock hook are respectively arranged on the upper and lower sides of the door frame. The upper transmission shaft is respectively connected to the upper rotating arm and the lock hook rotating shaft of the upper lock hook, and the lower transmission shaft is respectively connected to the lock hook rotating shaft of the upper lock hook and the lock hook rotating shaft of the lower lock hook.

6. The single-opening plug sliding door system according to claim 5, characterized in that: The mounting lock assembly also includes a universal joint, and the lock hook rotating shaft of the upper lock hook is respectively connected to the upper transmission shaft and the lower transmission shaft through the universal joint.

7. The single-opening plug sliding door system according to claim 1, characterized in that: The lock hook is provided with a return torsion spring for keeping the lock hook in a locked position through elastic action.

8. The single-opening plug sliding door system according to claim 1, characterized in that: The bearing drive mechanism also includes a door carrying frame, and the door leaf is connected to the transmission plate via the door carrying frame.

9. The single-opening plug sliding door system according to claim 1, characterized in that: The door leaf is provided with a lower guide rail, the door frame is provided with a left swing arm assembly, the left swing arm assembly is provided with a guide rail roller, and the guide rail roller cooperates with the lower guide rail.

10. The single-opening plug sliding door system according to claim 1, characterized in that: The door leaf is provided with a roller restraint assembly, which comprises a restraint roller and a corresponding roller bracket, and is used for the restraint roller to resist the rolling of the vehicle body during the process of closing the door.

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