Sliding door assembly

Abstract

The utility model relates to the technical field of vehicles, in particular to a sliding door assembly which comprises a sliding door outer plate, a sliding door inner plate and a connecting structure, the sliding door inner plate comprises an inner main plate and a window frame ring plate which are connected, a connecting plate is arranged on the top of the window frame ring plate, a plurality of reinforcing ribs are arranged on the connecting plate, and the connecting structure is arranged on the inner main plate. The multiple reinforcing ribs are arranged on the connecting plate at intervals. The connecting structures comprise one or more of a spot welding structure, a structural adhesive layer and an expansion adhesive layer, the connecting structures are arranged on the connecting plate at intervals, and the reinforcing ribs are connected with the sliding door outer plate through the connecting structures. The sliding door inner plate and the sliding door outer plate of the sliding door assembly have good connection stability, the sliding door inner plate can firmly and stably reinforce and support the sliding door outer plate through the connecting plate provided with the reinforcing ribs and the connecting structure, the electrophoresis exhaust space of the sliding door assembly is enlarged, the electrophoresis deformation condition of the sliding door outer plate is reduced, and the service life of the sliding door assembly is prolonged. And the rusting condition of the sliding door inner plate and the sliding door outer plate is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a sliding door assembly. Background Art

[0002] Multi-purpose vehicles such as family cars and business cars are generally equipped with sliding doors. When opened, the sliding doors take up little space, making it convenient for passengers to enter and exit the vehicle, and facilitating the entry and exit of passengers and the loading of cargo.

[0003] In the prior art, a sliding door consists of a connected outer panel and inner panel. The outer panel has a large flat surface. The inner panel has expansion adhesive grooves, which are then applied with expansion adhesive to form an expansion adhesive layer to support the outer panel. This method places high demands on the dimensional accuracy of the components themselves, the precision of the sheet metal welding, and the expansion coefficient of the expansion adhesive. Failure to meet the welding accuracy requirements often leads to problems such as debonding, which inconveniences welding and painting. Furthermore, the expansion adhesive provided by the inner panel to the outer panel is poorly supported, making the outer panel susceptible to deformation during electrophoretic coating. This can significantly increase electrophoretic defects within the cavities of the inner and outer panels, leading to problems such as sheet metal rust. Utility Model Content

[0004] The purpose of the present utility model is to provide a sliding door assembly to solve the problem in the related art that the sliding door inner panel supports the sliding door outer panel by means of expansion glue, but the supporting effect is poor, so that the sliding door outer panel is easily deformed during electrophoretic coating, which easily causes poor electrophoresis in the cavity of the sliding door inner panel and the sliding door outer panel, and is prone to rust.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The utility model provides a sliding door assembly, which includes:

[0007] Sliding door outer panel;

[0008] The sliding door inner panel comprises an inner main panel and a window frame ring panel connected to each other, wherein a connecting plate is provided on the top of the window frame ring panel, and a plurality of reinforcing ribs are provided on the connecting plate, wherein the plurality of reinforcing ribs are arranged at intervals on the connecting plate;

[0009] The connecting structure includes one or more of a spot welding structure, a structural adhesive layer and an expansion adhesive layer. There are multiple connecting structures, and the multiple connecting structures are arranged at intervals on the connecting plate. The reinforcing ribs are connected to the sliding door outer panel through the connecting structure.

[0010] In some embodiments, the connecting plate includes an annular plate and a straight plate connected to each other, the straight plate is arranged in the inner hole of the annular plate to separate the inner hole of the annular plate into multiple windows, the annular plate can be connected to the sliding door outer panel through the spot welding structure and the structural adhesive layer, and the straight plate can be connected to the sliding door outer panel through the expansion adhesive layer.

[0011] In some embodiments, the straight plate is provided with the reinforcing rib, the top of the reinforcing rib is concave to form a groove, and the expansion adhesive layer can partially fill the groove.

[0012] In some embodiments, the sliding door assembly also includes an upper hinge reinforcement plate, an outward opening handle mounting bracket and a lower hinge reinforcement plate fixedly connected in sequence, and the upper hinge reinforcement plate, the outward opening handle mounting bracket and the lower hinge reinforcement plate are arranged on the inner wall of the sliding door inner plate.

[0013] In some embodiments, the sliding door assembly also includes a lock body reinforcement plate, which is arranged on the inner wall of the sliding door inner plate, and the combination of the upper hinge reinforcement plate, the outward opening handle mounting bracket and the lower hinge reinforcement plate and the lock body reinforcement plate are arranged on both sides of the window frame ring plate.

[0014] In some embodiments, a portion of the upper hinge reinforcement plate is disposed on the inner wall of the inner main plate, and another portion is disposed on the surface of the window frame ring plate and the connecting plate;

[0015] Wherein, the upper hinge reinforcement plate can extend and be connected between two adjacent reinforcement ribs.

[0016] In some embodiments, a portion of the lock body reinforcement plate is disposed on the inner wall of the inner main plate, and another portion is disposed on the surface of the window frame ring plate and the connecting plate;

[0017] Wherein, the lock body reinforcement plate can extend and be connected between two adjacent reinforcement ribs.

[0018] In some embodiments, a hollow hole is provided on the inner main board, a connecting frame is provided on the edge of the hollow hole, the connecting frame is supported between the inner main board and the sliding door outer panel, and the connecting frame is connected to the sliding door outer panel.

[0019] In some embodiments, the connecting frame includes:

[0020] A vertical plate connected to the inner main plate;

[0021] A flat plate is bent and arranged on the top of the vertical plate, and the flat plate is connected to the outer plate of the sliding door.

[0022] In some embodiments, a plurality of the connecting frames are provided, and the plurality of connecting frames are spaced apart along the circumference of the hollow hole.

[0023] The beneficial effects of the utility model are:

[0024] The utility model provides a sliding door assembly, wherein a connecting plate with reinforcing ribs is provided on the window frame ring plate of the sliding door inner panel of the sliding door assembly, thereby effectively increasing the mechanical strength of the sliding door inner panel at the window position, reducing deformation, and ensuring the connection accuracy of the connecting plate to the sliding door outer panel through a connecting structure. Multiple connecting structures can be connected and fixed between the reinforcing ribs and the sliding door outer panel. The spot welding structure, the structural adhesive layer, and the expansion adhesive layer can be combined to increase the stability of the connection between the sliding door inner panel and the sliding door outer panel by combining the fixing stability of the spot welding structure, the high strength and load-bearing capacity of the structural adhesive layer, and the elasticity and corrosion resistance of the expansion adhesive layer. The sliding door inner panel can provide a firm and stable support for the sliding door outer panel by providing the connecting plate with reinforcing ribs and the connecting structure, thereby increasing the space for electrophoresis exhaust of the sliding door assembly, reducing the deformation of the sliding door outer panel during electrophoresis, and avoiding rusting of the sliding door inner panel and the sliding door outer panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the positional relationship between the sliding door outer panel and the sliding door inner panel in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the outer structure of the inner panel of the sliding door in an embodiment of the present utility model;

[0027] Figure 3 This is an axonometric view of the outer structure of the inner panel of the sliding door in the embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the inner structure of the sliding door inner panel in an embodiment of the present utility model;

[0029] Figure 5 Schematic diagram of the positions of the upper hinge reinforcement plate, the outward opening handle mounting bracket and the lower hinge reinforcement plate in an embodiment of the present utility model.

[0030] In the picture:

[0031] 1. Sliding door outer panel;

[0032] 2. Sliding door inner panel; 21. Inner main panel; 22. Window frame ring plate;

[0033] 23. Connecting plate; 231. Ring plate; 232. Straight plate;

[0034] 24. Reinforcement ribs; 241. Grooves;

[0035] 25. Hollow hole;

[0036] 26. Connecting frame; 261. Vertical plate; 262. Flat plate;

[0037] 3. Connection structure; 31. Spot welding structure; 32. Structural adhesive layer; 33. Expansion adhesive layer;

[0038] 4. Upper hinge reinforcement plate; 5. Outward handle mounting bracket; 6. Lower hinge reinforcement plate; 7. Lock body reinforcement plate. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0040] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0043] like Figures 1 to 4As shown, an embodiment of the present invention provides a sliding door assembly, which includes a sliding door outer panel 1, a sliding door inner panel 2, and a connecting structure 3. The sliding door inner panel 2 includes a connected inner main panel 21 and a window frame ring panel 22. The window frame ring panel 22 is provided with a connecting plate 23 on top. The connecting plate 23 is provided with multiple reinforcing ribs 24. The multiple reinforcing ribs 24 are spaced apart on the connecting plate 23. The reinforcing ribs 24 can effectively increase the strength of the connecting plate 23 and ensure connection accuracy. The connecting structure 3 includes one or more of a spot welding structure 31, a structural adhesive layer 32, and an expansion adhesive layer 33. That is, the spot welding structure 31, the structural adhesive layer 32, and the expansion adhesive layer 33 can be provided individually or in combination. Multiple connecting structures 3 are provided, and multiple connecting structures 3 are spaced apart on the connecting plate 23. The reinforcing ribs 24 are connected to the sliding door outer panel 1 through the connecting structure 3 to form a multi-point fixation.

[0044] In this configuration, the connection plate 23 with the reinforcing ribs 24 provided on the window frame ring plate 22 of the sliding door inner panel 2 can effectively increase the mechanical strength of the sliding door inner panel 2 at the window position, reduce deformation, and ensure the connection accuracy of the connection plate 23 to the sliding door outer panel 1 via the connection structure 3. Multiple connection structures 3 can connect and secure the reinforcing ribs 24 to the sliding door outer panel 1.

[0045] The spot weld structure 31 has a small heat-affected zone, minimal weld deformation, and a secure connection, adapting to various welding positions and providing excellent fixation between the inner and outer sliding door panels 2 and 1. The structural adhesive layer 32 fills the relatively large gap between the connecting plate 23 and the outer sliding door panel 1 and, upon curing, provides extremely high bond strength. The structural adhesive layer 32 exhibits a certain degree of elasticity, absorbing vibration and coping with thermal expansion and contraction between the connecting plate 23 and the outer sliding door panel 1. This provides excellent shock and impact resistance, reduces debonding, and evenly distributes stress, minimizing damage to the structural strength of the connecting plate 23 and the outer sliding door panel 1. After curing, the expanding adhesive layer 33 exhibits high flexibility and uniform foaming, as well as excellent elasticity, corrosion resistance, and heat resistance.

[0046] Optionally, the spot welding structure 31, the structural adhesive layer 32 and the expansion adhesive layer 33 can be arranged in combination, and the fixing stability of the spot welding structure 31, the high strength and bearing capacity of the structural adhesive layer 32, and the elasticity and corrosion resistance of the expansion adhesive layer 33 are combined to increase the connection stability between the sliding door inner panel 2 and the sliding door outer panel 1. The sliding door inner panel 2 can firmly and stably strengthen the support of the sliding door outer panel 1 through the connecting plate 23 and the connecting structure 3 provided with reinforcing ribs 24, thereby increasing the space for exhaust of the sliding door assembly during electrophoresis, reducing the deformation of the sliding door outer panel 1 during electrophoresis, and avoiding the rusting of the sliding door inner panel 2 and the sliding door outer panel 1. It solves the problem in the related art that the sliding door inner panel 2 supports the sliding door outer panel 1 through the expansion adhesive, but the supporting effect is poor, which makes the sliding door outer panel 1 easy to deform during electrophoretic coating, and easily causes poor electrophoresis in the cavity of the sliding door inner panel 2 and the sliding door outer panel 1, and is easy to rust.

[0047] In some other embodiments, the connection structure 3 may also be provided between a portion of the surface of the connection plate 23 and the sliding door outer panel 1 , thereby further enhancing the connection stability between the connection plate 23 and the sliding door outer panel 1 .

[0048] like Figures 2 to 4 As shown, in some embodiments, the connecting plate 23 includes a connected annular plate 231 and a straight plate 232. The straight plate 232 is disposed within the inner hole of the annular plate 231 to divide the inner hole of the annular plate 231 into a plurality of windows. The straight plate 232 is connected to the annular plate at both ends to provide reinforced support for the inner side of the annular plate 231. The annular plate 231 is connected to the sliding door outer panel 1 via a spot weld structure 31 and a structural adhesive layer 32, thereby forming a stable connection between the annular plate 231 and the sliding door outer panel 1. The straight plate 232 is connected to the sliding door outer panel 1 via an expandable adhesive layer 33. The straight plate 232 is required to withstand multi-directional stress from the annular plate 231 and the sliding door outer panel 1. The expansion adhesive layer 33 ensures that the straight plate 232 and the sliding door outer panel 1 have good elasticity and shock resistance while maintaining a stable connection, thereby reducing deformation.

[0049] In this embodiment, the annular plate 231 and the straight plate 232 of the connecting plate 23, the connecting plate 23 and the window frame ring plate 22, and the window frame ring plate 22 and the inner main plate 21 are all integrally formed, so that the entire sliding door inner plate 2 has good strength.

[0050] In some embodiments, a reinforcing rib 24 is provided on the straight plate 232, and the top of the reinforcing rib 24 is concave to form a groove 241, and the expansion adhesive layer 33 can be partially filled into the groove 241, that is, the reinforcing rib 24 can form a further reinforcing structure through the concave, thereby increasing the structural strength of the reinforcing rib 24 itself, and the groove 241 can provide an accommodating space for the expansion adhesive layer 33, so that the expansion adhesive layer 33 and the reinforcing rib 24 form an intervening card connection, thereby increasing the connection stability of the expansion adhesive layer 33 on the reinforcing rib 24, so that the expansion adhesive layer 33 can provide a stable and reinforced support for the sliding door outer panel 1.

[0051] like Figures 4 and 5 As shown, in some embodiments, the sliding door assembly also includes an upper hinge reinforcement plate 4, an outward opening handle mounting bracket 5 and a lower hinge reinforcement plate 6 fixedly connected in sequence. The upper hinge reinforcement plate 4, the outward opening handle mounting bracket 5 and the lower hinge reinforcement plate 6 are fixedly arranged on the inner wall of the sliding door inner panel 2. In this manner, on the basis of strengthening and supporting the upper hinge, handle and lower hinge, the upper hinge reinforcement plate 4, the outward opening handle mounting bracket 5 and the lower hinge reinforcement plate 6 are fixedly connected as a whole, which can provide overall support for the inner wall of the sliding door inner panel 2, strengthen the overall strength of the sliding door inner panel 2 and the upper hinge reinforcement plate 4, the outward opening handle mounting bracket 5 and the lower hinge reinforcement plate 6, thereby strengthening the support performance of the sliding door outer panel 1 and reducing the deformation of the sliding door outer panel 1.

[0052] In this embodiment, the upper hinge reinforcement plate 4, the outward opening handle mounting bracket 5, and the lower hinge reinforcement plate 6 can be integrally formed or independently fabricated and then secured via welding, clamping, or other means, thereby providing excellent mechanical strength. The connections between the upper hinge reinforcement plate 4, the outward opening handle mounting bracket 5, and the lower hinge reinforcement plate 6 and the sliding door inner panel 2 can be, but are not limited to, spot welding or structural adhesive bonding.

[0053] like Figures 4 and 5 As shown, in some embodiments, the sliding door assembly also includes a lock body reinforcement plate 7, which is fixedly arranged on the inner wall of the sliding door inner plate 2, and a combination of the upper hinge reinforcement plate 4, the outward opening handle mounting bracket 5 and the lower hinge reinforcement plate 6 and the lock body reinforcement plate 7 are respectively arranged on both sides of the window frame ring plate 22, which can strengthen the support of the inner main board 21 on both sides of the window frame ring plate 22, thereby improving its support strength for the sliding door outer plate 1 and reducing the deformation of the sliding door outer plate 1.

[0054] In this embodiment, the connection between the lock body reinforcement plate 7 and the sliding door inner panel 2 can be, but is not limited to, spot welding or structural adhesive bonding.

[0055] like Figures 4 and 5As shown, in some embodiments, a portion of the upper hinge reinforcement plate 4 is arranged on the inner wall of the inner main plate 21, and the other portion is arranged on the surface of the window frame ring plate 22 and the connecting plate 23. The upper hinge reinforcement plate 4 can extend and be connected between two adjacent reinforcement ribs 24, that is, the upper hinge reinforcement plate 4 can not only provide reinforcement support to the inner main plate 21, but also provide reinforcement support to the window frame ring plate 22 and the connecting plate 23, and the upper hinge reinforcement plate 4 can also provide reinforcement support between two adjacent reinforcement ribs 24, thereby reducing the stress deformation between the reinforcement ribs 24 and improving the overall structural stability of the sliding door inner panel 2.

[0056] In some embodiments, a portion of the lock body reinforcement plate 7 is arranged on the inner wall of the inner main plate 21, and the other portion is arranged on the surface of the window frame ring plate 22 and the connecting plate 23. The lock body reinforcement plate 7 can extend and connect between two adjacent reinforcement ribs 24, that is, the lock body reinforcement plate 7 can jointly reinforce and support the inner main plate 21, the window frame ring plate 22 and the connecting plate 23, and can also reinforce and support between two adjacent reinforcement ribs 24, further improving the overall structural stability of the sliding door inner panel 2.

[0057] like Figures 2 to 5 As shown, in some embodiments, a hollow hole 25 is provided on the inner main board 21, and a connecting frame 26 is provided on the edge of the hollow hole 25. The connecting frame 26 is supported between the inner main board 21 and the sliding door outer panel 1, and the connecting frame 26 is connected to the sliding door outer panel 1. With such a configuration, the connecting frame 26 can provide reinforced support in the circumferential direction of the hollow hole 25. The connecting frame 26 can be fixedly connected and supported between the inner main board 21 and the sliding door outer panel 1, which can reduce the deformation of the inner main board 21, so that the sliding door inner panel 2 as a whole can provide stable support for the sliding door outer panel 1.

[0058] In this embodiment, the connecting frame 26 and the inner main board 21 are integrally formed, thereby improving the structural strength of the joint between the connecting frame 26 and the inner main board 21 .

[0059] like Figures 4 and 5 As shown, in some embodiments, the connecting frame 26 includes a vertical plate 261 and a flat plate 262. The vertical plate 261 is connected to the inner main plate 21, and the flat plate 262 is bent and arranged on the top of the vertical plate 261. The surface of the flat plate 262 is connected to the sliding door outer panel 1, so that there is a larger connection area between the connecting frame 26 and the sliding door outer panel 1, thereby improving the connection stability between the connecting frame 26 and the sliding door outer panel 1, and strengthening the supporting performance of the sliding door inner panel 2 main body to the sliding door outer panel 1.

[0060] In this embodiment, the vertical plate 261 and the flat plate 262 of the connecting frame 26, and the connecting frame 26 and the inner main board 21 are all integrally formed, so that the joints between the vertical plate 261 and the flat plate 262, and the joints between the connecting frame 26 and the inner main board 21 have good structural strength.

[0061] like Figures 4 and 5 As shown, in some embodiments, a plurality of connecting frames 26 are provided, and the plurality of connecting frames 26 are arranged at intervals along the circumference of the hollow hole 25, which can strengthen the structural strength of the inner main board 21 in the circumference of the hollow hole 25, reduce the deformation of the inner main board 21, and thus improve the overall supporting performance of the sliding door inner panel 2 on the sliding door outer panel 1.

[0062] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A sliding door assembly, characterized in that: include: Sliding door outer panel(1); A sliding door inner panel (2) comprises an inner main panel (21) and a window frame ring panel (22) connected to each other, a connecting panel (23) being provided on the top of the window frame ring panel (22), a plurality of reinforcing ribs (24) being provided on the connecting panel (23), and the plurality of reinforcing ribs (24) being arranged at intervals on the connecting panel (23); A connecting structure (3), wherein the connecting structure (3) includes one or more of a spot welding structure (31), a structural adhesive layer (32), and an expansion adhesive layer (33); a plurality of the connecting structures (3) are provided, and the plurality of connecting structures (3) are spaced apart on the connecting plate (23); and the reinforcing rib (24) is connected to the sliding door outer panel (1) via the connecting structure (3).

2. The sliding door assembly according to claim 1, characterized in that: The connecting plate (23) comprises an annular plate (231) and a straight plate (232) connected to each other. The straight plate (232) is arranged in the inner hole of the annular plate (231) to separate the inner hole of the annular plate (231) into a plurality of windows. The annular plate (231) can be connected to the sliding door outer plate (1) through the spot welding structure (31) and the structural adhesive layer (32). The straight plate (232) can be connected to the sliding door outer plate (1) through the expansion adhesive layer (33).

3. The sliding door assembly according to claim 2, characterized in that: The straight plate (232) is provided with the reinforcing rib (24), the top of the reinforcing rib (24) is concave to form a groove (241), and the expansion adhesive layer (33) can partially fill the groove (241).

4. The sliding door assembly according to claim 1, characterized in that: The sliding door assembly further comprises an upper hinge reinforcement plate (4), an outward opening handle mounting bracket (5) and a lower hinge reinforcement plate (6) which are fixedly connected in sequence, and the upper hinge reinforcement plate (4), the outward opening handle mounting bracket (5) and the lower hinge reinforcement plate (6) are arranged on the inner wall of the sliding door inner plate (2).

5. The sliding door assembly according to claim 4, characterized in that: The sliding door assembly further comprises a lock body reinforcement plate (7), the lock body reinforcement plate (7) being arranged on the inner wall of the sliding door inner plate (2), and a combination of the upper hinge reinforcement plate (4), the outward opening handle mounting bracket (5) and the lower hinge reinforcement plate (6) and the lock body reinforcement plate (7) being arranged on both sides of the window frame ring plate (22).

6. The sliding door assembly according to claim 5, characterized in that: A portion of the upper hinge reinforcement plate (4) is arranged on the inner wall of the inner main plate (21), and another portion is arranged on the surface of the window frame ring plate (22) and the connecting plate (23); Wherein, the upper hinge reinforcement plate (4) can extend and be connected between two adjacent reinforcement ribs (24).

7. The sliding door assembly according to claim 5, characterized in that: A portion of the lock body reinforcement plate (7) is arranged on the inner wall of the inner main plate (21), and another portion is arranged on the surface of the window frame ring plate (22) and the connecting plate (23); Wherein, the lock body reinforcement plate (7) can extend and be connected between two adjacent reinforcement ribs (24).

8. The sliding door assembly according to claim 1, wherein: The inner main board (21) is provided with a hollow hole (25), and a connecting frame (26) is provided at the edge of the hollow hole (25). The connecting frame (26) is supported between the inner main board (21) and the sliding door outer board (1), and the connecting frame (26) is connected to the sliding door outer board (1).

9. The sliding door assembly according to claim 8, characterized in that: The connecting frame (26) comprises: A vertical plate (261), the vertical plate (261) being connected to the inner main plate (21); A flat plate (262) is bent and arranged on the top of the vertical plate (261), and the flat plate (262) is connected to the sliding door outer plate (1).

10. The sliding door assembly according to claim 8, wherein: A plurality of the connecting frames (26) are provided, and the plurality of the connecting frames (26) are arranged at intervals along the circumference of the hollow hole (25).

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