Sliding door assembly

Abstract

This application discloses a sliding door assembly, wherein the sliding door assembly includes a frame, a top rail body, at least one door leaf unit, at least one sliding unit, and at least one locking rail unit. The frame includes a top plate and a bottom plate opposite each other, the bottom plate forming a bottom rail. The top rail body is disposed on the top plate and forms a sliding space. The door leaf unit is located between the top plate and the bottom plate. The sliding unit includes a sliding connecting component and a sliding component movably disposed in the sliding space. The sliding component is disposed on the top of the door leaf unit through the sliding connecting component. The locking rail unit includes a locking rail component and a locking rail connecting component. The locking rail component is fixed to the bottom of the door leaf unit through the locking rail connecting component. The locking rail component retains a portion pressed away from the door leaf unit and locks the bottom rail to prevent the entire door leaf unit from swaying along the extension direction perpendicular to the sliding space.

Description

Technical Field

[0001] This application relates to the field of aluminum alloy sliding door technology, and more particularly to sliding door components. Background Technology

[0002] A sliding door, also known as a push-pull door, is a door in which an aluminum profile door frame surrounds the door leaf and is movably mounted in a fixed track via a pulley assembly, allowing the door leaf to move along the extension direction of the fixed track. Sliding doors are commonly used in decoration projects.

[0003] During the installation of existing sliding doors, after the aluminum profile door frame is wrapped around the door leaf, the pulley assembly is first installed on the top of the aluminum profile door frame. At the same time, fixed tracks and limiting guide rails are installed above and below the aluminum profile door frame, respectively. After the pulleys of the pulley assembly are movably engaged in the fixed tracks and the aluminum profile door frame is held above the limiting guide rails, the aluminum profile door frame is lowered by adjusting the nuts in the pulley assembly, and the limiting guide rails are movably engaged in the grooves at the bottom of the aluminum profile door frame to prevent the aluminum profile door frame from shaking.

[0004] When adjusting the nut in the pulley assembly, the limiting rail needs to be precisely engaged in the groove at the bottom of the aluminum profile door frame, and the limiting rail needs to maintain a distance from the inner wall of the groove at the bottom of the aluminum profile door frame to prevent the movement of the aluminum profile door frame from being restricted due to friction between the inner wall of the groove at the bottom of the aluminum profile door frame and the limiting rail when the aluminum profile door frame is moved.

[0005] Therefore, when adjusting the nuts in the pulley assembly, it is necessary to pay attention to the relative position between the groove at the bottom of the aluminum profile door frame and the limiting guide rail. It is necessary to prevent the limiting rail from not being engaged in the groove at the bottom of the aluminum profile door frame, and at the same time, to prevent the limiting rail from going too deep into the groove at the bottom of the aluminum profile door frame and contacting the inner wall of the groove. This will make it difficult to adjust the nuts in the pulley assembly and is prone to errors when adjusting the nuts in the pulley assembly. Utility Model Content

[0006] To address the aforementioned technical problems and achieve at least one advantage of this application, this application provides a sliding door assembly, wherein the sliding door assembly includes:

[0007] A frame, comprising a top plate and a bottom plate, the bottom plate and the top plate being arranged opposite each other in the direction of gravity, the bottom plate extending in the same direction as the top plate, and the bottom plate partially protruding towards the top plate along the extending direction to form a bottom rail;

[0008] A top rail body is disposed on the top plate in a manner consistent with the extending direction of the top plate, and the top rail body forms a sliding space along the extending direction;

[0009] At least one door leaf unit is disposed between the top plate and the bottom plate, and the door leaf unit remains vertical in the direction of gravity;

[0010] At least one sliding unit, the sliding unit including at least one sliding component and at least one sliding connecting component corresponding to the sliding component, the sliding component being disposed within the sliding space in a manner slidable along the extension direction of the sliding space, and the sliding component being disposed at the top of the door unit in the direction of gravity via the sliding connecting component; and

[0011] At least one rail unit, the rail unit including a rail assembly and a rail connecting assembly, the rail assembly including a mounting member, at least one elastic connecting member and at least one rail roller, the mounting member being fixed to the bottom of the door panel unit in the direction of gravity via the rail connecting assembly, the rail roller being disposed on the mounting member via the elastic connecting member, and the rail roller being held in a spring-loaded manner by the elastic connecting member in a direction away from the door panel unit and pressed against the bottom rail, the axial direction of the rail roller being perpendicular to the extension direction of the bottom rail, the rail roller being able to roll along the extension direction of the bottom rail, and the rail roller being circumferentially provided with a rail space to accommodate the bottom rail.

[0012] According to one embodiment of this application, both the elastic connecting member and the track roller are implemented in pairs. The two track rollers are respectively disposed on the mounting member through the two elastic connecting members, and the two track rollers are respectively held in a spring-loaded manner in a direction away from the door leaf unit and pressed against the bottom rail. The two track rollers are respectively arranged front and back in the extension direction of the bottom rail, and the two track rollers can roll along the extension direction of the bottom rail. The axial direction of the two track rollers is perpendicular to the extension direction of the bottom rail. The two track rollers are respectively provided with track-positioning spaces along the circumferential direction to accommodate the bottom rail.

[0013] According to one embodiment of this application, the elastic connecting member further includes a connecting roller and a spring-loaded member. One end of the connecting roller is rotatably connected to the mounting member via a rotating shaft passing through the connecting roller and the mounting member. The track-locking roller is rotatably mounted to the other end of the connecting roller. The spring-loaded member is disposed between the connecting roller and the mounting member in a manner that allows the connecting roller to always rotate about the rotating shaft and drives the track-locking roller to press away from the door leaf unit.

[0014] According to one embodiment of this application, the door leaf unit includes a door leaf body and a door frame. The door frame is implemented by including a rectangular door frame aluminum profile. The door frame surrounds the periphery of the door leaf body in an enclosing manner, and the door frame forms at least one first frame groove at the bottom of the door leaf unit in the gravity direction. The locking rail connection assembly includes at least one second insert, a second pressing frame member, at least one second connector, and a mounting connector. The second insert is disposed in the first frame groove in a manner that allows it to slide into the first frame groove. The second pressing frame member is attached to the door frame. At least one second connector is threadedly connected to the second insert in a manner that passes through the second pressing frame member and inserts into the second insert. The mounting connector is threadedly connected to the second insert in a manner that passes through the mounting member and the second pressing frame member and inserts into the second insert.

[0015] According to one embodiment of this application, the top rail main body extends towards each other to form two extensions in a manner that covers the sliding space along a direction perpendicular to the extension of the sliding space, and a sliding channel communicating with the sliding space is formed between the two extensions. The sliding assembly includes a sliding body, at least one pair of sliding members, and at least one main body connector. The pair of sliding bodies are rotatably connected to the sliding members. The pair of sliding bodies and the sliding members are both disposed in the sliding space in a manner that allows them to slide along the extension direction of the sliding space. The pair of sliding bodies are respectively placed on the surfaces of the two extensions. One end of the main body connector passes through the sliding channel and is disposed on the sliding body. The other end of the main body connector is disposed on the sliding connection assembly. The sliding connection assembly is fixed to the top of the door frame.

[0016] According to one embodiment of this application, the door frame forms at least one second frame groove at the top of the entire door leaf unit in the direction of gravity. The sliding connection assembly includes at least one first insert, a first pressing frame member, and at least one first connector corresponding to the first insert. The first insert is disposed in the second frame groove in a manner that allows it to slide into the second frame groove. The first pressing frame member is attached to the door frame. The first connector is threadedly connected to the first insert in a manner that allows it to pass through the first pressing frame member and into the first insert. One end of the main connector movably passes through the first pressing frame member, and the sliding body is disposed at the other end of the main connector.

[0017] According to one embodiment of this application, the sliding body is threadedly connected to the end of the body connector away from the first pressure frame member.

[0018] According to one embodiment of this application, the top rail body also has two hook wheel portions, and the two extension portions extend into the sliding space near the sliding channel to form the two hook wheel portions.

[0019] According to one embodiment of this application, the first frame groove is implemented as a T-shaped groove, the second insert is implemented as a T-shaped aluminum profile slider, and the second connector and the mounting connector are both implemented as screws.

[0020] According to one embodiment of this application, the springback element is implemented as a torsion spring. Attached Figure Description

[0021] Figure 1 A perspective view of a preferred embodiment of this application is shown.

[0022] Figure 2 It shows Figure 1 A magnified view of a portion of point A in the diagram.

[0023] Figure 3 This is a schematic diagram showing the state of the sliding component sliding into the sliding space in a preferred embodiment of this application.

[0024] Figure 4 It shows Figure 3 A magnified view of a portion of point B in the diagram.

[0025] Figure 5 A perspective view of the sliding unit described in a preferred embodiment of this application is shown.

[0026] Figure 6 A perspective view of the rail unit described in a preferred embodiment of this application is shown.

[0027] Figure 7 It shows Figure 6 A schematic cross-sectional view of the rail unit described in the document. Detailed Implementation

[0028] The following description is intended to disclose this application and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of this application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of this application.

[0029] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying 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, the above terms should not be construed as limitations on this application.

[0030] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0031] refer to Figures 1 to 7 A preferred embodiment of the sliding door assembly according to this application will be described in detail below, wherein the sliding door assembly includes a frame 10, a top rail body 20, at least one door leaf unit 30, at least one sliding unit 40 and at least one locking rail unit 50.

[0032] Specifically, the frame 10 includes a top plate 11 and a bottom plate 12. The bottom plate 12 and the top plate 11 are arranged opposite each other in the direction of gravity, and the bottom plate 12 extends in the same direction as the top plate 11. The bottom plate 12 protrudes towards the top plate 11 along its extending direction to form a bottom rail 121.

[0033] The top rail body 20 is disposed on the top plate 11 in a manner consistent with the extending direction of the top plate 11. The top rail body 20 forms a sliding space 201 along the extending direction.

[0034] The door leaf unit 30 is disposed between the top plate 11 and the bottom plate 12, and the door leaf unit 30 remains vertical in the direction of gravity.

[0035] The sliding unit 40 includes at least one sliding component 41 and at least one sliding connection component 42 corresponding to the sliding component 41. The sliding component 41 is disposed in the sliding space 201 in a manner that allows it to slide along the extension direction of the sliding space 201, and the sliding component 41 is disposed at the top of the door leaf unit 30 in the direction of gravity via the sliding connection component 42.

[0036] The rail-mounting unit 50 includes a rail-mounting assembly 51 and a rail-mounting connecting assembly 52. ​​The rail-mounting assembly 51 includes a mounting member 511, at least one elastic connecting member 512, and at least one rail-mounting roller 513. The mounting member 511 is fixed to the bottom of the door leaf unit 30 in the direction of gravity via the rail-mounting connecting assembly 52. ​​The rail-mounting roller 513 is disposed on the mounting member 511 via the elastic connecting member 512, and the rail-mounting roller 513 is held in a spring-loaded manner, pressed away from the door leaf unit 30 and against the bottom rail 121, and can roll along the extending direction of the bottom rail 121. The axial direction of the rail-mounting roller 513 is perpendicular to the extending direction of the bottom rail 121. The rail-mounting roller 513 has a circumferentially formed rail space 51301 for accommodating the bottom rail 121.

[0037] As an example, the top rail body 20 is mounted to the top plate 11 by screws, and the sliding assembly 41 is disposed on the top of the door leaf unit 30 via the sliding connection assembly 42. The mounting member 511 is disposed on the bottom of the door leaf unit 30 via the rail connection assembly 52. ​​The rail roller 513 is then movably connected to the mounting member 511 via the elastic connection member 512 in a rollable manner while maintaining a pressure away from the door leaf unit 30. To position the door leaf unit 30 between the top plate 11 and the bottom plate 12 so that it can move along the extension direction of the sliding space 201, it is necessary to... First, the guide roller actuator 513 controls some components within the elastic connecting member 512 to undergo elastic deformation, keeping the guide roller actuator 513 close to the door leaf unit 30. Then, the sliding assembly 41 is slid into the sliding space 201 in a manner that allows it to move along the extension direction of the sliding space 201. Subsequently, by releasing the guide roller actuator 513, and under the rebound force of some components within the elastic connecting member 512, the guide roller actuator 513 rebounds to actively press against the bottom rail 121, while the bottom rail 121 is accommodated within the rail placement space 51301 at the point where it is pressed by the guide roller actuator 513.

[0038] It is understood that when the door panel unit 30 is pushed along the extending direction of the sliding space 201, the door panel unit 30 will drive the sliding component 41 to slide within the sliding space 201 via the sliding connection component 42. Simultaneously, the track roller 513 will roll along the extending direction of the bottom rail 121 while remaining pressed against the surface of the bottom rail 121. Since the bottom rail 121 is accommodated within the track space 51301 at the point where it is pressed by the track roller 513, and the track space 51301 is located circumferentially to the track roller 513, when the door panel unit 30 as a whole wobbles along the extending direction perpendicular to the sliding space 201, the track roller 513 abuts against the bottom rail 121 at both axial ends to lock the bottom rail 121, thereby preventing the door panel unit 30 from wobbling along the extending direction perpendicular to the sliding space 201 and improving the stability when pushing the door panel unit 30.

[0039] Meanwhile, since the track roller 513 can roll along the extension direction of the bottom rail 121 on the surface of the bottom rail 121, the resistance when pushing the door leaf unit 30 can be reduced, so as to facilitate pushing the door leaf unit 30.

[0040] It is worth mentioning that, during the installation of the sliding door assembly, it is only necessary to control the track roller 513 to move it close to the door leaf unit 30 and release the track roller 513 to actively maintain it pressing away from the door leaf unit 30 and against the bottom rail 121, thereby making the installation of the sliding door assembly easier to operate. At the same time, under the action of the elastic connecting member 512, the track roller 513 is always actively pressed away from the door leaf unit 30 and against the bottom rail 121, so as to prevent the door leaf unit 30 from shaking along the extension direction perpendicular to the sliding space 201 due to the track roller 513 derailing when pushing the door leaf unit 30 to move along the extension direction of the sliding space 201.

[0041] Preferably, both the elastic connecting member 512 and the track roller actuator 513 are implemented in pairs. The two track roller actuators 513 are respectively disposed on the mounting member 511 via the two elastic connecting members 512, and the two track roller actuators 513 are held in a spring-loaded manner, pressed away from the door leaf unit 30 and against the bottom rail 121. The two track roller actuators 513 are respectively arranged front and rear along the extending direction of the bottom rail 121, and the two track roller actuators 513 are respectively rollable along the extending direction of the bottom rail 121. The axial directions of the two track roller actuators 513 are perpendicular to the extending direction of the bottom rail 121. The two track roller actuators 513 are respectively provided with track-positioning spaces 51301 along the circumferential direction to accommodate the bottom rail 121. Since both the elastic connecting member 512 and the track roller 513 are implemented in pairs, the stability of the door leaf unit 30 is improved when the door leaf unit 30 is pushed along the extension direction of the sliding space 201, and the possibility of the door leaf unit 30 as a whole swaying along the extension direction perpendicular to the sliding space 201 is further reduced.

[0042] In this embodiment, the elastic connecting member 512 further includes a connecting roller 5121 and a spring-loaded member 5122. One end of the connecting roller 5121 is rotatably connected to the mounting member 511 via a rotating shaft passing through the connecting roller 5121 and the mounting member 511. The spring-loaded member 5122 is disposed between the connecting roller 5121 and the mounting member 511. The track-clamping roller 513 is rotatably mounted on the other end of the connecting roller 5121 so that, under the action of the spring-loaded member 5122, the connecting roller 5121 always maintains a tendency to rotate about the rotating shaft and drive the track-clamping roller 513 to press away from the door leaf unit 30, thereby keeping the track-clamping roller 513 pressed against the bottom rail 121.

[0043] As an example, the springback element 5122 is implemented to include a torsion spring, such as Figure 7 As shown, the spring-loaded member 5122 is sleeved on the rotating shaft, and the two torsion arms of the spring-loaded member 5122 abut against the mounting member 511 and the connecting roller member 5121, respectively.

[0044] In another modified embodiment, the elastic connecting member 512 further includes a connecting roller 5121 and a spring. Both ends of the spring are fixed to the connecting roller 5121 and the mounting member 511. The track-mounting roller 513 is rotatably mounted to the connecting roller 5121 so that, under the action of the spring, the connecting roller 5121 always maintains a tendency to push the track-mounting roller 513 away from the door leaf unit 30, thereby keeping the track-mounting roller 513 pressed against the bottom rail 121.

[0045] To enable those skilled in the art to understand this application, in at least one embodiment of this application, the elastic connecting member 512 further includes the connecting roller 5121 and the spring-loaded member 5122, one end of the connecting roller 5121 is rotatably connected to the mounting member 511 through a rotating shaft passing through the connecting roller 5121 and the mounting member 511, the spring-loaded member 5122 is disposed between the connecting roller 5121 and the mounting member 511, and the rail-clamping roller 513 is rotatably mounted on the other end of the connecting roller 5121.

[0046] Preferably, the door leaf unit 30 includes a door leaf body 31 and a door frame 32. The door frame 32 is implemented as a rectangular door frame aluminum profile. The door frame 32 surrounds the periphery of the door leaf body 31 in an enclosing manner, and the door frame 32 forms at least one first frame groove 3201 at the bottom of the door leaf unit 30 in the gravity direction of the whole.

[0047] The rail connection assembly 52 includes at least one second insert 521, a second clamping frame member 522, at least one second connector 523, and a mounting connector 524. The second insert 521 is disposed within the first frame groove 3201 such that it can slide into the first frame groove 3201. The second clamping frame member 522 is attached to the door frame 32. At least one second connector 523 is threadedly connected to the second insert 521, passing through the second clamping frame member 522 and inserting into the second insert 521. By increasing the screw-in depth of the second connector 523 into the second insert 521, the second insert 521 and the second clamping frame member 522 clamp the door frame 32, thereby fixing the second insert 521 and the second clamping frame member 522 in a predetermined position. The mounting connector 524 is threaded to the second insert 521 in such a way that it passes through the mounting member 511 and the second pressure frame member 522 and is inserted into the second insert member 521, so that the mounting member 511 is fixed to the surface of the second pressure frame member 522 by increasing the screwing depth of the mounting connector 524 threaded to the second insert member 521.

[0048] As an example, the first frame groove 3201 is implemented as a T-shaped groove. The second insert 521 is implemented as a T-shaped aluminum profile slider. The second connector 523 and the mounting connector 524 are both implemented as screws.

[0049] Preferably, the top rail body 20 extends towards each other in a manner that covers the sliding space 201 in a direction perpendicular to the sliding space 201 to form two extensions 21, and a sliding channel 202 communicating with the sliding space 201 is formed between the two extensions 21.

[0050] The sliding assembly 41 includes a sliding body 411, at least one pair of sliding members 412, and at least one main body connector 413. The pair of sliding bodies 411 are rotatably connected to the sliding members 412. Both the pair of sliding bodies 411 and the sliding members 412 are slidably disposed within the sliding space 201, extending along its extension direction, and the pair of sliding bodies 411 are respectively positioned on the surfaces of the two extension portions 21. One end of the main body connector 413 passes through the sliding channel 202 and is disposed on the sliding body 411, while the other end of the main body connector 413 is disposed on the sliding connecting assembly 42, which is fixed to the top of the door frame 32. In other words, the sliding member 412 is fixed to the top of the door frame 32 sequentially via the main body connector 413 and the sliding connecting assembly 42.

[0051] It is understood that when the door leaf unit 30 is pushed along the extension direction of the sliding space 201, the door frame 32 of the door leaf unit 30 will sequentially drive a pair of sliding members 412 to roll on the surfaces of the two extension portions 21 and move along the extension direction of the sliding space 201 through the sliding connection assembly 42, the main body connector 413 and the sliding body 411. At the same time, the end of the main body connector 413 near the sliding body 411 will slide within the sliding channel 202 along the extension direction of the sliding channel 202.

[0052] Furthermore, the sliding member 412 is implemented in two pairs, and the two pairs of sliding members 412 are rotatably connected to the sliding body 411 in a relative manner. The two pairs of sliding members 412 are arranged one in front of the other in the extension direction of the sliding channel 202. By increasing the number of sliding members 412, the contact area between the sliding member 412 and the extension portion 21 is increased, and the pressure at the contact point between a single sliding member 412 and the extension portion 21 is reduced. As a result, when the door leaf unit 30 is pushed along the extension direction of the sliding space 201, the door frame 32 of the door leaf unit 30 is more likely to be driven by the sliding connection assembly 42, the main body connector 413 and the sliding body 411 to roll the sliding member 412 on the surface of the extension portion 21 and move along the extension direction of the sliding space 201, thereby improving the stability when the door leaf unit 30 is pushed along the extension direction of the sliding space 201.

[0053] As an example, the slider 412 is implemented to include a roller.

[0054] Preferably, the door frame 32 forms at least one second frame groove 3202 at the top of the door leaf unit 30 in the direction of gravity. The sliding connection assembly 42 includes at least one first insert 421, a first frame pressing member 422, and at least one first connector 423 corresponding to the first insert 421. The first insert 421 is disposed in the second frame groove 3202 in a manner that allows it to slide into the second frame groove 3202. The first frame pressing member 422 is attached to the door frame 32. The first connector 423 is threadedly connected to the first insert 421 in a manner that passes through the first frame pressing member 422 and inserts into the first insert 421, so that by increasing the screw-in depth of the first connector 423 into the first insert 421, the first insert 421 and the first frame pressing member 422 clamp the door frame 32, thereby fixing the first insert 421 and the first frame pressing member 422 to a predetermined position on the door frame 32. One end of the main body connector 413 movably passes through the first pressure frame 422, and the sliding body 411 is disposed at the other end of the main body connector 413.

[0055] Furthermore, the sliding body 411 is threaded to the end of the main body connector 413 away from the first pressure frame member 422, so that by rotating the sliding body 411, the distance between the sliding body 411 and the first pressure frame member 422 can be changed, thereby changing the distance between the sliding member 412 and the top of the door frame 32, so as to adjust the overall ground height of the door leaf unit 30 according to actual needs.

[0056] As an example, the second frame groove 3202 is implemented as a T-shaped groove. The first insert 421 is implemented as a T-shaped aluminum profile slider. The first connector 423 and the main connector 413 are both implemented as screws.

[0057] Preferably, the top rail body 20 also has two hook wheel portions 22. The two extension portions 21 extend into the sliding space 201 near the sliding channel 202 to form two hook wheel portions 22, so that when the two pairs of sliding members 412 roll on the surfaces of the two extension portions 21 and move along the extension direction of the sliding space 201, the two hook wheel portions 22 block and limit the rolling direction of the two pairs of sliding members 412, thereby preventing the two pairs of sliding members 412 from hitting the inner wall of the sliding space 201 and obstructing the pushing of the door leaf unit 30.

[0058] Those skilled in the art should understand that the embodiments of this application described above and shown in the accompanying drawings are merely examples and do not limit the scope of this application. The advantages of this application have been fully and effectively implemented. The functional and structural principles of this application have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of this application without departing from the stated principles.

Claims

1. A sliding door assembly, characterized in that, The sliding door assembly includes: A frame, comprising a top plate and a bottom plate, the bottom plate and the top plate being arranged opposite each other in the direction of gravity, the bottom plate extending in the same direction as the top plate, and the bottom plate partially protruding towards the top plate along the extending direction to form a bottom rail; A top rail body is disposed on the top plate in a manner consistent with the extending direction of the top plate, and the top rail body forms a sliding space along the extending direction; At least one door leaf unit is disposed between the top plate and the bottom plate, and the door leaf unit remains vertical in the direction of gravity; At least one sliding unit, the sliding unit including at least one sliding component and at least one sliding connecting component corresponding to the sliding component, the sliding component being disposed within the sliding space in a manner slidable along the extension direction of the sliding space, and the sliding component being disposed at the top of the door unit in the direction of gravity via the sliding connecting component; and At least one rail unit, the rail unit including a rail assembly and a rail connecting assembly, the rail assembly including a mounting member, at least one elastic connecting member and at least one rail roller, the mounting member being fixed to the bottom of the door panel unit in the direction of gravity via the rail connecting assembly, the rail roller being disposed on the mounting member via the elastic connecting member, and the rail roller being held in a spring-loaded manner by the elastic connecting member in a direction away from the door panel unit and pressed against the bottom rail, the axial direction of the rail roller being perpendicular to the extension direction of the bottom rail, the rail roller being able to roll along the extension direction of the bottom rail, and the rail roller being circumferentially provided with a rail space to accommodate the bottom rail.

2. The sliding door assembly according to claim 1, characterized in that, Both the elastic connecting member and the track roller are implemented in pairs. The two track rollers are respectively disposed on the mounting member through the two elastic connecting members, and the two track rollers are respectively held in a spring-loaded manner in a direction away from the door leaf unit and pressed against the bottom rail. The two track rollers are respectively arranged front and back in the extension direction of the bottom rail, and the two track rollers can roll along the extension direction of the bottom rail. The axial direction of the two track rollers is perpendicular to the extension direction of the bottom rail. The two track rollers are respectively provided with track-positioning spaces along the circumferential direction to accommodate the bottom rail.

3. The sliding door assembly of claim 2, wherein, The elastic connecting member further includes a connecting roller and a spring-loaded member. One end of the connecting roller is rotatably connected to the mounting member via a rotating shaft passing through the connecting roller and the mounting member. The track-locking roller is rotatably mounted to the other end of the connecting roller. The spring-loaded member is disposed between the connecting roller and the mounting member in a manner that allows the connecting roller to always rotate around the rotating shaft and drives the track-locking roller to press away from the door leaf unit.

4. The sliding door assembly of claim 3, wherein, The door leaf unit includes a door leaf body and a door frame. The door frame is implemented by including a rectangular door frame aluminum profile. The door frame surrounds the periphery of the door leaf body in an enclosing manner, and the door frame forms at least one first frame groove at the bottom of the door leaf unit in the direction of gravity. The locking rail connection assembly includes at least one second insert, a second pressing frame member, at least one second connector, and a mounting connector. The second insert is disposed in the first frame groove in a manner that allows it to slide into the first frame groove. The second pressing frame member is attached to the door frame. At least one second connector is threadedly connected to the second insert in a manner that passes through the second pressing frame member and inserts into the second insert. The mounting connector is threadedly connected to the second insert in a manner that passes through the mounting member and the second pressing frame member and inserts into the second insert.

5. The sliding door assembly of claim 4, wherein, The main body of the top rail extends towards each other in a manner that covers the sliding space in a direction perpendicular to the extension of the sliding space to form two extensions, and a sliding channel communicating with the sliding space is formed between the two extensions. The sliding assembly includes a sliding body, at least one pair of sliding members, and at least one main body connector. The pair of sliding bodies are rotatably connected to the sliding members. The pair of sliding bodies and the sliding members are both disposed in the sliding space in a manner that allows them to slide along the extension direction of the sliding space. The pair of sliding bodies are respectively placed on the surfaces of the two extensions. One end of the main body connector passes through the sliding channel and is disposed on the sliding body. The other end of the main body connector is disposed on the sliding connection assembly. The sliding connection assembly is fixed to the top of the door frame.

6. The sliding door assembly of claim 5, wherein, The door frame forms at least one second frame groove at the top of the entire door leaf unit in the direction of gravity. The sliding connection assembly includes at least one first insert, a first pressing frame member, and at least one first connector corresponding to the first insert. The first insert is disposed in the second frame groove in a manner that allows it to slide into the second frame groove. The first pressing frame member is attached to the door frame. The first connector is threadedly connected to the first insert in a manner that allows it to pass through the first pressing frame member and into the first insert. One end of the main connector can movably pass through the first pressing frame member. The sliding body is disposed at the other end of the main connector.

7. The sliding door assembly of claim 6, wherein, The sliding body is threadedly connected to the end of the body connector away from the first pressure frame.

8. The sliding door assembly of claim 7, wherein, The top rail body also has two hook wheel sections, and the two extension sections extend into the sliding space near the sliding channel to form the two hook wheel sections.

9. The sliding door assembly according to claim 8, characterized in that, The first frame groove is implemented as a T-shaped groove, the second insert is implemented as a T-shaped aluminum profile slider, and the second connector and the mounting connector are both implemented as screws.

10. A sliding door assembly according to any one of claims 3 to 9, wherein, The spring-loaded component includes a torsion spring.

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