A double-leaf sliding door

Abstract

The application discloses a double-leaf sliding door, which comprises a bearing beam, two end support pieces, and is characterized in that the bearing beam is movably arranged in the front-back direction; the two end support pieces are respectively connected to the left and right ends of the bearing beam and are provided with synchronous racks extending in the front-back direction; the left and right ends of the bearing beam are provided with synchronous gears which are engaged with the synchronous racks and used for controlling the movement in the front-back direction. The double-leaf sliding door has the effect of improving the sealing performance when the two door leaves are closed.

Description

Technical Field

[0001] This application relates to the field of train equipment, and in particular to a double-opening sliding door. Background Technology

[0002] During train travel, due to the high speed, if the doors are not well sealed, it will cause significant wind noise inside the train.

[0003] Double-leaf train doors require multiple points of constraint to achieve a reliable locking and sealing effect when closed. Existing structures for achieving multi-point constraint are primarily located in the load-bearing drive mechanism at the top of the double door panels. However, existing double-door structures are prone to situations where one door is closed tightly while the other is not. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a double-leaf sliding door that improves the sealing performance of both door panels when closed.

[0005] This application provides a double-opening sliding door, including a load-bearing beam and two end support members, wherein the load-bearing beam is movable in the front-to-back direction; wherein... The two end brackets are respectively connected to the left and right ends of the load-bearing beam, and are provided with synchronous racks extending in the front-back direction; The left and right ends of the load-bearing beam are provided with synchronous gears, which mesh with the synchronous rack to control the movement in the forward and backward directions.

[0006] Optionally, the two end brackets are provided with support rails extending in the front-to-back direction; The left and right ends of the load-bearing beam are provided with rail fittings, which are installed on the support rails to bear the load and guide the movement in the forward and backward directions.

[0007] Optionally, the support rail is located inside the end bracket; the synchronous rack is located on the lower side of the end bracket, with its teeth facing downwards. The track fitting is located at the end of the load-bearing beam; the synchronous gear is located below the track fitting.

[0008] Optionally, the track fitting is a track slider, which is fitted onto the support track; or The track fitting is a rolling bearing, which is supported on the supporting track.

[0009] Optionally, the track fitting is a rolling bearing; the synchronizing gear is coaxially arranged with the track fitting.

[0010] Optionally, the double-opening sliding door also includes a reverse threaded screw, two sets of door sliding blocks, two door carrying frames, two door changing guide rails, two nut pieces, and two nut head guide rails; The reverse threaded screw is connected between the two end support members and includes a left section and a right section with opposite helical directions, and is located on the upper side of the load-bearing beam member; the two nuts are fitted onto the reverse threaded screw and are located on the left section and the right section respectively; The front side of the load-bearing beam is provided with two door body linear guide rails, which extend in the left and right direction and are arranged parallel to each other at intervals in the top and bottom; two sets of door body sliding blocks are respectively fitted onto the two door body linear guide rails; Two door-shaped guide rails are respectively located above the two door frames, and include a first straight section and a curved section; the first straight section is located on the outer side and is parallel to the door straight guide rail; the curved section is located on the inner side and is curved to the rear and inner sides. The two door-carrying frames are respectively connected to the two sets of door body sliding blocks; the two door-carrying frames are provided with two door-carrying connecting arms protruding rearward; the two door-carrying connecting arms are respectively connected to the tail ends of the two nut pieces; the upper ends of the two door-carrying frames are respectively provided with two guide heads, and the two guide heads are respectively engaged with the two door body variable guide rails to generate a front-back component force when the curved section moves, so as to drive the door-carrying frames and the bearing beam to move in the front-back direction, and drive the head end of the nut piece to swing around the reverse threaded screw as a reversing lever; The two nut head guide rails include a second straight section and a locking groove section. The second straight section is arranged parallel to the door body straight guide rail. The locking groove section is arranged on the inner side and turns at a right angle to the front side. The head ends of the two nuts respectively mate with the two nut head guide rails, so that when the door is locked, the head ends of the nuts are confined within the locking groove section.

[0011] Optionally, the double-leaf sliding door also includes two door panels and two door locking components; The pillar locking component includes a pillar rod, a locking connecting arm, a rod sleeve gear, a locking fork, and an auxiliary lock support; The two uprights extend vertically and are rotatably connected to the two end brackets respectively; One end of each of the two locking door connecting arms is connected to one of the two load-bearing beams, and the other end is connected to one of the two uprights, which are used to drive the uprights to rotate when the load-bearing beams move back and forth; The auxiliary lock support is fixedly connected to the outer door frame; the lock door fork is rotatably mounted on the auxiliary lock support, and the rotation axis of the lock door fork is parallel to the rotation axis of the column rod; the front end of the lock door fork is provided with a clamping groove; The gear sleeve is fitted onto the column rod and is used to rotate with the column rod to drive the door locking fork to rotate; The two door panels are respectively connected to the two door-carrying frames, and a locking pin is provided at the corresponding door locking fork; During the closing process, as the locking pin moves inward and backward, it inserts into the clamping groove at the front end of the door locking fork, and the opening path direction of the locking pin is perpendicular to the groove wall of the clamping groove.

[0012] Optionally, the pillar locking device further includes a toggle cam; The actuating cam is rotatably mounted on the auxiliary lock support; the actuating cam includes a base circle portion and a lever portion; the base circle portion is provided with teeth and meshes with the lever sleeve gear; the lever portion abuts against the tail section of the lock door fork; During the closing process, the lever of the actuating cam swings outward. When the door is locked, the end face of the lever abuts against the tail section of the locking fork, and the tail section of the locking fork is perpendicular to the lever to form a dead point.

[0013] Optionally, the pillar locking component further includes a reset elastic element; The reset elastic element is connected to the door locking fork. When the door is closed, the reset elastic element accumulates elastic force to drive the door locking fork to reset.

[0014] Optionally, the front end of the locking fork includes an inner locking hook and an outer locking hook forming the clamping groove; The extension length of the inner locking hook is longer than the extension length of the outer locking hook; During the closing process, when the locking pin moves inward, the locking pin passes over the outer locking hook, the inner locking hook receives the locking pin, and guides it into the clamping groove.

[0015] The double-leaf sliding door provided in this application enhances the synchronicity of the two sides of the load-bearing beam during the sliding motion by setting synchronous gears, thereby improving the sealing performance of the two door leaves when they are closed. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the double-opening sliding door of this application.

[0018] Figure 2-1 for Figure 1 The diagram shows the structural schematic of the load-bearing drive mechanism in the double-opening sliding door.

[0019] Figure 2-2 for Figure 2-1 A magnified view of the framed area.

[0020] Figure 3-1 for Figure 1 The diagram shows a structural schematic of the drive mechanism in a double-opening sliding door from another perspective.

[0021] Figure 3-2 for Figure 3-1 A magnified view of the area circled in the middle.

[0022] Figure 4-1 for Figure 1 This is a structural schematic diagram of the drive mechanism in a double-opening sliding door from another perspective.

[0023] Figure 4-2 for Figure 4-1 A magnified view of the area circled in the middle.

[0024] Figure 5-1 This is a schematic diagram of the load-bearing drive mechanism in the second embodiment of the double-opening sliding door of this application.

[0025] Figure 5-2 for Figure 5-1 A magnified view of the area circled in the middle.

[0026] Figure 6-1 for Figure 1 The diagram shows another view of the structure of the drive mechanism in the double-opening sliding door.

[0027] Figure 6-2 for Figure 6-1 A magnified view of the area circled in the middle.

[0028] Figure 7 for Figure 1 The diagram shows a partial structural schematic of the central pillar locking mechanism of a double-opening sliding door.

[0029] Figure 8-1 for Figure 1 A partial structural diagram of the central pillar locking component of the double-opening sliding door, shown from another perspective.

[0030] Figure 8-2 for Figure 8-1 A magnified view of some parts in the middle circle area.

[0031] Figure 9 for Figure 8-2 The diagram shows a cross-sectional view of the structure in the open position along the AA direction.

[0032] Figure 10 for Figure 8-2 The diagram shows a cross-sectional view of the structure in the closed position along the AA direction. Detailed Implementation

[0033] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this application. Based on the description of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0034] In the description of this application, unless otherwise expressly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms based on the specific circumstances.

[0035] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product is usually placed in during use. They are used only for the convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] The terms “first,” “second,” “third,” etc., are merely used to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0037] The terms “include,” “contain,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0038] Please see Figure 1 This application discloses a first embodiment of a double-opening sliding door.

[0039] The double-leaf sliding door includes two door panels 1000 that open and close to the left and right; and a load-bearing drive mechanism disposed above the door panels 1000. In the diagram, the arrow on the x-axis points to the left, and the opposite direction points to the right. The arrow on the y-axis points forward, and the opposite direction points to the rear. The arrow on the z-axis points upward, and the opposite direction points to the downward.

[0040] The double-leaf sliding door provided in this application improves the sealing performance of the sliding door system.

[0041] Please see Figure 2-1 and Figure 2-2 This application discloses a double-opening sliding door, including a load-bearing beam 100 and two end support members 200, wherein the load-bearing beam 100 is movable in the front-back direction.

[0042] Please see Figure 3-1 and Figure 3-2 The two end brackets 200 are respectively connected to the left and right ends of the bearing beam 100, and are provided with synchronous racks 210 extending in the front-back direction.

[0043] Synchronous gears 110 are provided at both ends of the supporting beam 100. The synchronous gears 110 mesh with the synchronous rack 210 to control the movement in the forward and backward directions. Specifically, the synchronous gears 110 pass through the interior of the supporting beam 100 to achieve the effect of synchronous rotation of the synchronous gears 110 on both sides.

[0044] In this embodiment, by setting the synchronizing gear 110, the synchronicity of the two sides of the load-bearing beam 100 during the sling movement can be enhanced, thereby improving the sealing performance of the two door panels when they are closed.

[0045] Please refer to Figure 3-1 , Figure 3-2 , Figure 4-1 and Figure 4-2 Furthermore, in the first embodiment, the two end brackets 200 are provided with support rails 220 extending in the front-rear direction.

[0046] The left and right ends of the load-bearing beam 100 are provided with track fittings 120, which are installed on the support track 220 for bearing load and guiding movement in the forward and backward directions.

[0047] In this embodiment, by setting the support rail 220 and the rail fitting 120, the stability of the front and rear sliding of the load-bearing beam 100 can be enhanced, thereby improving the sealing performance of the two door panels when closed. Furthermore, by setting the synchronous gears 110 on both end faces of the load-bearing beam 100 and the rail fitting 120, space can be better utilized, and the structure is simpler and lighter.

[0048] Furthermore, in the first embodiment, the support rail 220 is disposed on the inner side of the end bracket 200; the synchronous rack 210 is disposed on the lower side of the end bracket 200, and the tooth surface is disposed facing downward.

[0049] The track fitting 120 is located at the end of the bearing beam 100; the synchronous gear 110 is located below the track fitting 120.

[0050] In this embodiment, the inner side and lower end face of the end bracket 200 are fully utilized, resulting in high space utilization and lighter weight.

[0051] Furthermore, in the first embodiment, the track fitting 120 is a track slider, fitted onto the support track 220. Of course, in other embodiments, the track fitting 120 can also be a rolling bearing, supported on the support track 220.

[0052] In this embodiment, by selecting the track fitting 120 as the track slider, the corresponding support track 220 can be selected as the engineering guide rail. On the one hand, the engineering guide rail itself has a simple structure and good economy; on the other hand, the door body linear guide rail 130 on the bearing beam 100 can also be selected as the same type of engineering guide rail, thereby further enhancing the economy of the product, reducing the difficulty of material preparation, and increasing the convenience of maintenance.

[0053] In other embodiments, please refer to Figure 5-1 and Figure 5-2 This application presents a second embodiment of a double-opening sliding door. Based on the first embodiment, this embodiment modifies relevant parts of the support track 220, track fitting 120, synchronous rack 210, and synchronous gear 110, as detailed below: The track fitting 120a is a rolling bearing; the synchronizing gear 110a is coaxially arranged with the track fitting 120a. Correspondingly, the synchronizing rack 210a and the supporting track 220a are adaptively adjusted.

[0054] Please refer to Figure 2-1 and Figure 2-2 , Figure 3-1 and Figure 3-2 , Figure 4-1 and Figure 4-2 , Figure 6-1and Figure 6-2 Furthermore, in the first embodiment, the double-opening sliding door also includes a reverse threaded screw 300, two sets of door body sliding blocks 400, two door carrying frames 500, two door body variable guide rails 600, two nut pieces 700, and two nut head guide rails 800. The reverse threaded screw 300 is connected between the two end support members 200 and includes a left section 310 and a right section 320 with opposite helical directions, and is located on the upper side of the bearing beam member 100; the two nut members 700 are fitted on the reverse threaded screw 300 and are located on the left section 310 and the right section 320 respectively.

[0055] The front side of the supporting beam 100 is provided with two door linear guide rails 130, which extend in the left and right direction and are arranged in parallel with vertical spacing; two sets of door sliding sliders 400 are respectively fitted on the two door linear guide rails 130.

[0056] Two door-shaped guide rails 600 are respectively disposed above the two door-carrying frames 500, and include a first straight section 610 and a curved section 620; the first straight section 610 is disposed on the outer side and is disposed parallel to the door straight guide rail 130; the curved section 620 is disposed on the inner side and is bent to the rear and inner sides. Two door-carrying frames 500 are respectively connected to two sets of door body sliding sliders 400; two door-carrying connecting arms 510 protrude rearward from the two door-carrying frames 500; the two door-carrying connecting arms 510 are respectively connected to the tail ends 710 of the two nut parts 700; two guide heads 520 protrude from the upper ends of the two door-carrying frames 500 respectively, and the two guide heads 520 cooperate with the two door body variable guide rails 600 respectively, for generating a front-back component force when the curved section 620 moves, so as to drive the door-carrying frames 500 and the bearing beam 100 to move in the front-back direction, and drive the head end 720 of the nut part 700 to swing around the reverse threaded screw 300 as a reversing lever.

[0057] The two nut head guide rails 800 include a second straight section 810 and a locking groove section 820. The second straight section 810 is arranged parallel to the door body straight guide rail 130. The locking groove section 820 is arranged on the inner side and turns at a right angle to the front side.

[0058] The head ends 720 of the two nut pieces 700 respectively mate with the two nut head guide rails 800, so that when the door is locked, the head ends 720 of the nut pieces 700 are confined within the locking groove section 820, such as... Figure 6-1 and Figure 6-2 As shown.

[0059] In this embodiment, when the reverse threaded screw 300 is driven by the motor, it will drive the two nuts 700 to move accordingly to close the door, or move in the opposite direction to open the door. When opening the door, the nuts 700 drive the door carrier 500 to move outward; under the action of the door body guide rail 600, the door carrier 500 will move outward and forward; when the door carrier 500 moves forward, it will move forward together with the supporting beam 100, and drive the head end 720 of the nuts 700 to move backward and move out of the locking groove section 820. When the door carrier 500 moves outward, it will move in the left and right direction relative to the supporting beam 100.

[0060] When the door closes, the nut 700 drives the door carrier 500 to move inward; under the action of the door body guide rail 600, the door carrier 500 will move inward and backward; when the door carrier 500 moves inward, it will move in the left and right direction relative to the supporting beam 100. When the door carrier 500 moves backward, it will move backward together with the supporting beam 100, and drive the head end 720 of the nut 700 to move forward and enter the locking groove section 820.

[0061] In this embodiment, the drive is achieved by the reverse threaded screw 300, which provides a large driving torque and good synchronization of the two nut components 700. Furthermore, by setting the nut component 700 to have a reversing lever swing effect, it can cooperate with the locking groove section 820 to form a dead point for locking the door, thereby improving the sealing performance of the two door panels when they are closed.

[0062] Please see Figure 1 Furthermore, in the first embodiment, the double-leaf sliding door also includes two door panels 1000 and two door locking components 900. Please refer to... Figure 1 The two pillar locking components 900 are located on the left and right sides of the two door panels 1000 respectively, and lock the edges of the door panels 1000 when the two door panels 1000 are closed.

[0063] Please see Figure 7 , Figure 8-1 and Figure 8-2 , Figure 9 , Figure 10 The pillar locking component 900 includes a pillar rod 910, a locking connecting arm 920, a rod sleeve gear 930, a locking fork 940, and an auxiliary lock support 960.

[0064] The two uprights 910 extend vertically and are rotatably connected to the two end brackets 200 respectively. Specifically, the uprights 910 are arranged along the door leaf 1000, are generally in a zigzag shape, and are connected by casters at the zigzag points.

[0065] One end of each of the two door locking connecting arms 920 is connected to one of the two load-bearing beams 100, and the other end is connected to one of the two column rods 910, which are used to drive the column rods 910 to rotate when the load-bearing beams 100 move back and forth.

[0066] The auxiliary lock support 960 is fixedly connected to the outer door frame; the door lock fork 940 is rotatably mounted on the auxiliary lock support 960, and the rotation axis of the door lock fork 940 is parallel to the rotation axis of the column rod 910; the front end of the door lock fork 940 is provided with a clamping groove 941.

[0067] The sleeve gear 930 is sleeved on the column rod 910 and rotates with the column rod 910 to drive the door locking fork 940 to rotate. The sleeve gear 930 can directly drive the door locking fork 940 to rotate, or it can indirectly drive the door locking fork 940 to rotate. This embodiment uses an indirect drive method (via actuating the cam 950). Directly driving the door locking fork 940 to rotate can be achieved through direct gear engagement.

[0068] The two door panels 1000 are respectively connected to the two door carriers 500, and a locking pin 1010 is provided at the corresponding door locking fork 940; During the closing process, as the locking pin 1010 moves inward and backward, it inserts into the clamping groove 941 at the front end of the door locking fork 940, and the opening path direction of the locking pin 1010 is perpendicular to the groove wall of the clamping groove 941. Figure 10 As shown.

[0069] In this embodiment, the pillar locking component 900 converts the forward and backward movement of the supporting beam component 100 into its own rotational power, which then drives the locking fork 940 to rotate. Thus, when the door is closed, the locking pin 1010 is engaged in the clamping groove 941, thereby increasing the auxiliary locking points on the left and right sides of the two door leaves 1000, and thus enhancing the sealing performance of the door leaves 1000 when locking.

[0070] Furthermore, in the first embodiment, the pillar locking component 900 also includes a toggle cam 950.

[0071] The actuating cam 950 is rotatably mounted on the auxiliary lock support 960; the actuating cam 950 includes a base circle portion 951 and a lever portion 952; the base circle portion 951 is provided with teeth and meshes with the lever sleeve gear 930; the lever portion 952 abuts against the tail section 944 of the lock door fork 940.

[0072] During the closing process, the lever portion 952 of the actuating cam 950 swings outward. When the door is locked, the end face of the lever portion 952 abuts against the tail section 944 of the locking fork 940, and the tail section 944 of the locking fork 940 forms a right angle with the lever portion 952 to create a dead point. Figure 10 As shown.

[0073] In this embodiment, when the door is closed, the lever portion 952 of the actuating cam 950 is directed towards the rotation center of the actuating cam 950, so it can withstand a large force without changing its relative position, thus achieving a secure locking effect.

[0074] Furthermore, in the first embodiment, the pillar locking member 900 also includes a reset elastic member 970.

[0075] The reset elastic element 970 is connected to the door locking fork 940. When the door is closed, the reset elastic element 970 accumulates elastic force to drive the door locking fork 940 to reset. Specifically, the reset elastic element 970 is a torsion spring; in other embodiments, it can also be a tension spring, a repulsive magnetic element, etc.

[0076] In this embodiment, by setting a reset elastic element 970, the door locking fork 940 can be driven to reset, thereby preventing the door locking fork 940 from not swinging into place after the door is opened, which would affect the next engagement with the locking pin 1010.

[0077] Furthermore, in the first embodiment, the front end of the locking fork 940 includes an inner locking hook 942 and an outer locking hook 943 forming the clamping groove 941.

[0078] The inner locking hook 942 extends longer than the outer locking hook 943 and is located on the closing path of the locking pin 1010.

[0079] During the closing process, when the locking pin 1010 moves inward, the locking pin 1010 passes over the outer locking hook 943, and the inner locking hook 942 receives the locking pin 1010 and guides it into the clamping groove 941.

[0080] In this embodiment, by setting the inner locking hook 942 to be longer, it can be ensured that the locking pin 1010 can enter the clamping groove 941 each time, thereby ensuring and enhancing the sealing performance of the door leaf 1000 when locking.

[0081] Please refer to Figure 8-1 and Figure 8-2 In this embodiment, a door lock component 900 has a set of door lock connecting arms 920, a rod sleeve gear 930, a door lock fork 940, and an auxiliary lock support 960 in the upper and lower halves of the longitudinal direction of its column rod 910. This allows the door leaf 1000 to be locked more securely.

[0082] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0083] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A double-opening sliding door, comprising a load-bearing beam (100) and two end support members (200), wherein the load-bearing beam (100) is movable in the front-rear direction; characterized in that, The two end brackets (200) are respectively connected to the left and right ends of the load-bearing beam (100), and are provided with synchronous racks (210) extending in the front-back direction; The left and right ends of the supporting beam (100) are provided with synchronous gears (110), which mesh with the synchronous rack (210) to control the movement in the forward and backward directions; The two end brackets (200) are provided with support rails (220, 220a) extending in the front-rear direction; The left and right ends of the load-bearing beam (100) are provided with track fittings (120, 120a), which are installed on the support track (220, 220a) for bearing load and guiding movement in the front and back directions; The double-opening sliding door also includes a reverse threaded screw (300), two sets of door body sliding blocks (400), two door carrying frames (500), two door body variable guide rails (600), two nut pieces (700), and two nut head guide rails (800); The reverse threaded screw (300) is connected between the two end support members (200) and includes a left section (310) and a right section (320) with opposite helical directions, and is located on the upper side of the load-bearing beam member (100); the two nut members (700) are fitted on the reverse threaded screw (300) and are located on the left section (310) and the right section (320) respectively; The front side of the supporting beam (100) is provided with two door body linear guide rails (130), which extend in the left and right direction and are arranged parallel to each other at intervals in the upper and lower directions; two sets of door body sliding blocks (400) are respectively fitted on the two door body linear guide rails (130); Two door-mounted guide rails (600) are respectively located above the two door frames (500), and include a first straight section (610) and a curved section (620); the first straight section (610) is located on the outer side and is parallel to the door-mounted straight guide rail (130); the curved section (620) is located on the inner side and is curved to the rear and inner sides; Two door-carrying frames (500) are respectively connected to two sets of door body sliding blocks (400); two door-carrying connecting arms (510) protrude rearward from the two door-carrying frames (500); the two door-carrying connecting arms (510) are respectively connected to the tail ends (710) of the two nut pieces (700); two guide heads (520) protrude from the upper ends of the two door-carrying frames (500), and the two guide heads (520) cooperate with the two door body variable guide rails (600) respectively, for generating a front-to-back component force when the curved section (620) moves, so as to drive the door-carrying frames (500) and the bearing beam (100) to move in the front-to-back direction, and drive the head end (720) of the nut piece (700) to swing around the reverse threaded screw (300) as a reversing lever; The two nut head guide rails (800) include a second straight section (810) and a locking groove section (820). The second straight section (810) is arranged parallel to the door body straight guide rail (130). The locking groove section (820) is arranged on the inner side and turns at a right angle to the front side. The head ends (720) of the two nut pieces (700) respectively cooperate with the two nut head guide rails (800) for limiting the head ends (720) of the nut pieces (700) within the locking groove section (820) when the door is locked. The double-leaf sliding door also includes two door panels (1000) and two pillar locking components (900); The pillar lock assembly (900) includes a pillar rod (910), a lock connecting arm (920), a rod sleeve gear (930), a lock fork (940), and an auxiliary lock support (960); The two column rods (910) extend vertically and are rotatably connected to the two end brackets (200) respectively; One end of each of the two door locking connecting arms (920) is connected to one of the two bearing beams (100), and the other end is connected to one of the two column rods (910), which are used to drive the column rods (910) to rotate when the bearing beams (100) move back and forth; The auxiliary lock support (960) is fixedly connected to the outer door frame; the lock door fork (940) is rotatably mounted on the auxiliary lock support (960), and the rotation axis of the lock door fork (940) is parallel to the rotation axis of the column rod (910); the front end of the lock door fork (940) is provided with a clamping groove (941); The gear sleeve (930) is sleeved on the column rod (910) and is used to follow the rotation of the column rod (910) to drive the door locking fork (940) to rotate. The two door panels (1000) are respectively connected to the two door carriers (500), and a locking pin (1010) is provided at the corresponding locking fork (940); During the closing process, when the locking pin (1010) moves inward and backward, the locking pin (1010) inserts into the clamping groove (941) at the front end of the door lock fork (940), and the opening path direction of the locking pin (1010) is perpendicular to the groove wall of the clamping groove (941).

2. The double-opening sliding door as described in claim 1, characterized in that, The support rail (220) is located inside the end bracket (200); the synchronous rack (210) is located on the lower side of the end bracket (200), and the tooth surface is facing downward. The track fitting (120) is located at the end of the bearing beam (100); the synchronous gear (110) is located below the track fitting (120).

3. The double-opening sliding door as described in claim 2, characterized in that, The track fitting (120) is a track slider, which is fitted onto the support track (220); or The track fitting (120) is a rolling bearing, which is supported on the support track (220).

4. The double-opening sliding door as described in claim 1, characterized in that, The track fitting (120a) is a rolling bearing; the synchronous gear (110a) is coaxially arranged with the track fitting (120a).

5. The double-opening sliding door as described in claim 1, characterized in that, The pillar locking component (900) also includes a toggle cam (950); The actuating cam (950) is rotatably mounted on the auxiliary lock support (960); the actuating cam (950) includes a base circle portion (951) and a lever portion (952); the base circle portion (951) is provided with teeth and meshes with the lever sleeve gear (930); the lever portion (952) abuts against the tail section (944) of the lock door fork (940); During the closing process, the lever portion (952) of the actuating cam (950) swings outward. When the door is locked, the end face of the lever portion (952) abuts against the tail section (944) of the door locking fork (940), and the tail section (944) of the door locking fork (940) is at a right angle to the lever portion (952) to form a dead point.

6. The double-leaf sliding door as described in claim 5, characterized in that, The pillar locking component (900) also includes a reset elastic component (970); The reset elastic element (970) is connected to the door locking fork (940). When the door is closed, the reset elastic element (970) accumulates elastic force to drive the door locking fork (940) to reset.

7. The double-leaf sliding door as described in claim 5, characterized in that, The front end of the locking fork (940) includes an inner locking hook (942) and an outer locking hook (943) forming the clamping groove (941); The inner locking hook (942) extends longer than the outer locking hook (943); During the closing process, when the locking pin (1010) moves inward, the locking pin (1010) passes over the outer locking hook (943), the inner locking hook (942) receives the locking pin (1010) and guides it into the clamping groove (941).

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