Folding door structure

Abstract

The utility model discloses a folding door structure which comprises an overhead rail assembly, a first suspension wheel assembly, a second suspension wheel assembly and a door plate assembly. The hanger rail assembly comprises a hanger rail body, and a guide sliding rail is formed at the top of the hanger rail body. The first suspension wheel assembly comprises a first suspension wheel seat and a first suspension wheel body, one end of the first suspension wheel seat is slidably connected to the guide sliding rail through the first suspension wheel body, and the other end forms a first mounting part; the second suspension wheel assembly comprises a second suspension wheel seat and a second suspension wheel body, one end of the second suspension wheel seat is slidably connected to the guide sliding rail through the second suspension wheel body, and the other end forms a second mounting part; the door plate assembly comprises a first door plate and a second door plate, a first door shaft is arranged at the top of the first door plate and is hinged to the first mounting part; a second door shaft is arranged at the top of the second door plate and hinged to the second mounting part. According to the utility model, the visual transparency and the open feeling can be improved, the risk of clamping hands is reduced, and the cleaning is relatively simple.

Description

TECHNICAL FIELD

[0001] The utility model relates to furniture technical field, concretely relates to a folding door structure. BACKGROUND

[0002] The folding door is a door system composed of multiple door plate units, can fold or push away like a book page, and is commonly used in balcony, patio, courtyard, commercial space or indoor and outdoor connecting place. The structural design makes the door fold into a very compact form when being opened, provides maximum opening space, and can ensure visual permeability and aesthetic appearance.

[0003] The existing folding door generally needs to be installed with square frame fixing in advance, and the design of the frame column occupies a part of space, the overall visual effect is relatively thick, the visual permeability and openness are slightly inferior, on the other hand, the design of the frame column is easy to pinch hands, and is inconvenient to clean. INVENTION CONTENTS

[0004] In order to overcome the defects of the prior art, the purpose of the utility model is to provide a folding door structure which can improve the visual permeability and openness, reduce the risk of pinching hands, and is relatively simple to clean.

[0005] The purpose of the utility model is realized by adopting the following technical scheme:

[0006] A folding door structure, characterized by comprising a hanging rail assembly, a first suspension wheel assembly, a second suspension wheel assembly and a door plate assembly.

[0007] The hanging rail assembly comprises a hanging rail body, and a guide sliding rail is formed at the top of the hanging rail body.

[0008] The first suspension wheel assembly comprises a first suspension wheel seat and a first suspension wheel body, one end of the first suspension wheel seat is connected to the guide sliding rail through the first suspension wheel body, and the other end forms a first mounting portion.

[0009] The second suspension wheel assembly comprises a second suspension wheel seat and a second suspension wheel body, one end of the second suspension wheel seat is connected to the guide sliding rail through the second suspension wheel body, and the other end forms a second mounting portion.

[0010] The door plate assembly comprises a first door plate and a second door plate, the top of the first door plate is provided with a first door shaft, the first door shaft is hinged to the first mounting portion, the top of the second door plate is provided with a second door shaft, the second door shaft is hinged to the second mounting portion, and the side surface of the first door plate is hinged to the side surface of the second door plate, so that the first door plate and the second door plate can rotate relatively to form a folded state and an unfolded state.

[0011] In an alternative embodiment, a ground rail assembly is further included, which is arranged below the overhead rail assembly in the direction of gravity; the ground rail assembly comprises a ground rail body, a countersunk screw and a first expansion pipe, the ground rail body is provided with a plurality of connecting through holes along the length direction thereof; the first expansion pipe is embedded in the ground, and the countersunk screw is connected with the first expansion pipe through the connecting through holes, so as to fix the ground rail body to the ground.

[0012] In an alternative embodiment, a limiting sliding groove is formed in the ground rail body, and the limiting sliding groove is arranged in the same direction as the guide sliding rail;

[0013] The first door plate is fixed with a first limiting pulley at the bottom, the first limiting pulley is rolling connected in the limiting sliding groove, the second door plate is fixed with a second limiting pulley at the bottom, and the second limiting pulley is rolling connected in the limiting sliding groove.

[0014] In an alternative embodiment, the first door plate comprises a first connecting frame, the first connecting frame comprises a first top edge frame, a first left edge frame, a first right edge frame and a first bottom edge frame, and a first panel is mounted between the first top edge frame, the first left edge frame, the first right edge frame and the first bottom edge frame.

[0015] In an alternative embodiment, the first door shaft is fixed to the end of the first top edge frame through a first connecting plate, and an anti-falling part is formed at the top of the first door shaft.

[0016] A connecting groove is formed in the first mounting portion, the connecting groove has an opening end, the first door shaft enters into the connecting groove through the opening end of the connecting groove, and the first door shaft is limited to be axially separated out through the anti-falling part.

[0017] The opening end of the connecting groove is provided with an anti-falling hole, and an anti-falling pin is matched in the anti-falling hole, the end of the anti-falling pin enters into the connecting groove through the anti-falling hole, and the first door shaft is limited to be separated out from the opening end of the connecting groove.

[0018] In an alternative embodiment, the second door plate comprises a second connecting frame, the second connecting frame comprises a second top edge frame, a second left edge frame, a second right edge frame and a second bottom edge frame, and a second panel is mounted between the second top edge frame, the second left edge frame, the second right edge frame and the second bottom edge frame.

[0019] The first right edge frame and the second left edge frame are connected through a hinge, so that the first door plate and the second door plate can be relatively rotated.

[0020] The first door shaft is arranged close to the first left edge frame, and the second door shaft is arranged close to the second right edge frame.

[0021] In an alternative embodiment, the first panel and the second panel are both glass panels, and a plurality of support strips are arranged between the glass panels.

[0022] In an alternative embodiment, the hanger rail body is provided with a plurality of connecting through holes along the length direction thereof.

[0023] The hanger rail assembly further comprises an isolation sleeve, a bolt and a second expansion pipe, the second expansion pipe is used for being embedded in a wall surface, and the bolt is sequentially connected with the connecting through hole, the isolation sleeve and the second expansion pipe.

[0024] In an alternative embodiment, the first hanger wheel body is circumferentially provided with a guide sliding groove, the guide sliding groove is matched with the guide sliding rail, and the first hanger wheel body is slidably connected to the hanger rail body through cooperation of the guide sliding groove and the guide sliding rail.

[0025] In an alternative embodiment, the hanger rail body is provided with a limiting pulling groove at each end thereof.

[0026] The first hanger wheel seat is provided with a locking hole, and a locking piece is matched with the locking hole; the relative position of the first hanger wheel assembly and the hanger rail body is locked through the locking piece sequentially penetrating the locking hole and the limiting pulling groove.

[0027] Compared with the prior art, the utility model has the advantages of:

[0028] The folding door structure of the utility model is provided with the first door plate and the second door plate, the first door plate and the second door plate are connected through the hinge, and the first door plate and the second door plate can rotate relative to each other; the first door plate top is connected with the hanger rail body through the first hanger wheel assembly, and the second door plate top is connected with the hanger rail body through the second hanger wheel assembly, so that the first door plate can rotate relative to the hanger rail body around the first door shaft, and the first door plate can also slide in the length direction of the hanger rail body, the second door plate can rotate relative to the hanger rail body around the second door shaft, and the second door plate can also slide in the length direction of the hanger rail body, the switching between the folding state and the unfolded state of the door plate assembly is realized, the folding door structure of the utility model realizes the fixation and installation of the door plate assembly through the hanger rail assembly, various stand columns are not needed to be arranged, better visual permeability and openness can be provided, the frameless design reduces the risk of hand clamping, there is no cleaning dead angle, and cleaning is relatively simple. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a perspective view of the folding door structure of example 1.

[0030] Figure 2 It is a structure schematic view of the hanger rail assembly of the folding door structure of example 1.

[0031] Figure 3 Structure diagram of a first hanger wheel assembly of the folding door structure of Example 1;

[0032] Figure 4 Structure diagram of a first hanger wheel assembly of the folding door structure of Example 1 from another angle;

[0033] Figure 5 Left view of the first hanger wheel assembly of the folding door structure of Example 1;

[0034] Figure 6 Structure diagram of a ground rail assembly of the folding door structure of Example 1;

[0035] Figure 7 Structure diagram of a door panel assembly of the folding door structure of Example 1;

[0036] Figure 8 Enlarged view of part A of the folding door structure of Example 1;

[0037] Figure 9 Connection relationship diagram of the components of the folding door structure of Example 1.

[0038] In the figure: 10, hanger rail assembly; 11, hanger rail body; 111, guide slide rail; 112, limiting pull groove; 113, locking piece; 12, isolation sleeve; 13, bolt; 14, second expansion pipe; 20, first hanger wheel assembly; 21, first hanger wheel seat; 211, first mounting part; 212, connecting groove; 213, anti-falling hole; 214, locking hole position; 22, first hanger wheel body; 221, guide slide groove; 30, second hanger wheel assembly; 31, second hanger wheel seat; 32, second hanger wheel body; 321, second mounting part; 40, door panel assembly; 41, first door panel; 411, first door shaft; 412, first limiting pulley; 413, first connecting frame; 414, first faceplate; 415, first connecting plate; 416, anti-falling part; 42, second door panel; 421, second door shaft; 423, second connecting frame; 424, second faceplate; 50, ground rail assembly; 51, ground rail body; 511, limiting slide groove; 52, countersunk screw; 53, first expansion pipe. DETAILED DESCRIPTION

[0039] The utility model is further described below in combination with the drawings and specific embodiments. It should be noted that the embodiments described below or the technical features between them can be combined to form new embodiments without conflict. Unless otherwise specified, the materials and equipment used in the embodiments can be purchased from the market. The examples of the embodiments are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the application and cannot be understood as limiting the application.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically specified.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "communicated", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The terms "first", "second", and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0043] Embodiment 1:

[0044] Please refer to Figures 1-9 The embodiment provides a folding door structure, which comprises a hanging rail assembly 10, a first hanging wheel assembly 20, a second hanging wheel assembly 30, a door panel assembly 40 and a ground rail assembly 50.

[0045] The hanging rail assembly 10 comprises a hanging rail body 11, and a guide sliding rail 111 is formed at the top of the hanging rail body 11;

[0046] The first suspension wheel assembly 20 comprises a first suspension wheel base 21 and a first suspension wheel body 22. One end of the first suspension wheel base 21 is connected to the guide rail 111 through the first suspension wheel body 22, and the other end forms a first mounting portion 211 for connecting with the door panel assembly 40.

[0047] The second suspension wheel assembly 30 comprises a second suspension wheel base 31 and a second suspension wheel body 32. One end of the second suspension wheel base 31 is connected to the guide rail 111 through the second suspension wheel body 32, and the other end forms a second mounting portion 321 for connecting with the door panel assembly 40.

[0048] The door panel assembly 40 comprises a first door panel 41 and a second door panel 42. The first door panel 41 is provided with a first door shaft 411 at the top, which is hinged to the first mounting portion 211. The second door panel 42 is provided with a second door shaft 421 at the top, which is hinged to the second mounting portion 321. The side of the first door panel 41 is hinged to the side of the second door panel 42, so that the first door panel 41 and the second door panel 42 can rotate relative to each other to form a folded state and an unfolded state.

[0049] In this embodiment, the first door panel 41 and the second door panel 42 are connected by a hinge, so that they can rotate relative to each other. The first door panel 41 is connected to the overhead rail body 11 through the first suspension wheel assembly 20 at the top, and the second door panel 42 is connected to the overhead rail body 11 through the second suspension wheel assembly 30 at the top. The first door panel 41 can rotate around the first door shaft 411 relative to the overhead rail body 11, and can also slide in the length direction of the overhead rail body 11 (i.e. the direction of the guide rail 111). The second door panel 42 can rotate around the second door shaft 421 relative to the overhead rail body 11, and can also slide in the length direction of the overhead rail body 11. This embodiment realizes the switching of the door panel assembly 40 between the folded state and the unfolded state through the overhead rail assembly 10. The folding door structure of this embodiment realizes the fixation and installation of the door panel assembly 40 through the overhead rail assembly 10, which eliminates the need for various stand columns, provides better visual transparency and openness, and reduces the risk of pinching hands due to the frameless design. In addition, there is no cleaning dead angle, and cleaning is relatively simple.

[0050] Specifically, the ground rail assembly 50 is pre-buried below the gravity direction of the overhead rail assembly 10. The ground rail assembly 50 comprises a ground rail body 51, a countersunk screw 52 and a first expansion pipe 53. The ground rail body 51 is provided with a plurality of connecting through holes along its length direction. The first expansion pipe 53 is pre-buried in the ground, and the countersunk screw 52 is connected to the first expansion pipe 53 through the connecting through holes, thereby fixing the ground rail body 51 to the ground.

[0051] The ground rail body 51 is formed with a limiting sliding groove 511, which is U-shaped in cross section and has a bottom wall and side walls. The limiting sliding groove 511 is arranged in the same direction as the guide sliding rail 111.

[0052] The first door plate 41 is fixed with a first limiting pulley 412 at the bottom. The first limiting pulley 412 is coaxially arranged with the first door shaft 411. The first limiting pulley 412 is rollingly connected in the limiting sliding groove 511. Specifically, the first limiting pulley 412 is rollingly in contact with the side wall of the limiting sliding groove 511 in the circumferential direction. The second door plate 42 is fixed with a second limiting pulley at the bottom, which is rollingly connected in the limiting sliding groove 511. The ground rail assembly 50 is arranged to limit the bottom of the first door plate 41 and the second door plate 42, thereby improving the stability of the door plate assembly 40. The first limiting pulley 412 and the second limiting pulley are arranged to improve the smoothness of the door plate assembly 40 during folding or unfolding.

[0053] The first door plate 41 comprises a first connecting frame 413, which comprises a first top edge frame, a first left edge frame, a first right edge frame, and a first bottom edge frame. The first top edge frame, the first left edge frame, the first right edge frame, and the first bottom edge frame are sequentially connected end to end to form a square frame. The first top edge frame, the first left edge frame, the first right edge frame, and the first bottom edge frame can be made of aluminum profiles. In this embodiment, a first panel 414 is mounted between the first top edge frame, the first left edge frame, the first right edge frame, and the first bottom edge frame. The first panel 414 is usually a glass panel. The edges of the glass panel are clamped in the clamping grooves formed on the first bottom edge frame, the first top edge frame, the first left edge frame, and the first right edge frame. The first panel 414 can also be composed of a plurality of small panel unit assemblies. The plurality of panel units are spliced by support strip frames. Those skilled in the art can implement according to actual needs.

[0054] The first door shaft 411 is fixed to the end of the first top edge frame through a first connecting plate 415. The first door shaft 411 is formed with an anti-disengagement portion 416 at the top.

[0055] The first mounting portion 211 is provided with a connecting groove 212 adapted to the first door shaft 411 and horizontally arranged. The connecting groove 212 has an opening end. The first door shaft 411 enters the connecting groove 212 through the opening end of the connecting groove 212. The anti-disengagement portion 416 limits the axial disengagement of the first door shaft 411.

[0056] The connecting slot 212 is provided with a anti-drop hole 213 at the opening end, and an anti-drop pin is matched in the anti-drop hole 213; by penetrating the anti-drop pin into the connecting slot 212 through the anti-drop hole 213, the first door shaft 411 is limited to be pulled out from the opening end of the connecting slot 212.

[0057] Based on the above structure, when the first door plate 41 is installed, only the first door shaft 411 of the first door plate 41 needs to be penetrated into the connecting slot 212 through the opening end of the connecting slot 212, and then the anti-drop pin is penetrated from the anti-drop hole 213, so that the first door plate 41 can be locked with the first hanger wheel assembly 20, and the installation is more convenient and stable.

[0058] The second door plate 42 comprises a second connecting frame 423, the second connecting frame 423 comprises a second top frame, a second left frame, a second right frame and a second bottom frame, and a second panel 424 is installed between the second top frame, the second left frame, the second right frame and the second bottom frame. The first door shaft 411 is arranged close to the first left frame; and the second door shaft 421 is arranged close to the second right frame. The structure of the second door plate 42 of the embodiment is basically the same as that of the first door plate 41, and the two are arranged side by side and connected at the head and tail.

[0059] Further, the hanger rail body 11 is provided with a plurality of connecting through holes along the length direction thereof;

[0060] The hanger rail assembly 10 further comprises an isolation sleeve 12, a bolt 13 and a second expansion pipe 14; the second expansion pipe 14 is used for being pre-buried in the wall surface, and the bolt 13 is sequentially penetrated through the connecting through hole, the isolation sleeve 12 and the second expansion pipe 14 to be connected. By arranging the isolation sleeve 12, the hanger rail body 11 is isolated from the wall surface, and enough space is provided for the sliding of the first hanger wheel assembly 20 and the second hanger wheel assembly 30, so as to prevent the door plate assembly 40 from colliding with the wall surface in the opening and closing process. The mode that the hanger rail assembly 10 is directly connected with the wall surface in the embodiment occupies small space, can meet the installation in a narrow area, and is more practical.

[0061] The first hanger wheel body 22 is circumferentially provided with a guide sliding groove 221, the guide sliding groove 221 is matched with the guide sliding rail 111, and the first hanger wheel body 22 is slidably connected to the hanger rail body 11 through the cooperation of the guide sliding groove 221 and the guide sliding rail 111. Under the action of gravity, the circumferential guide sliding groove 221 of the first hanger wheel body 22 can be tightly matched with the surface of the guide sliding rail 111, and under the limiting action of the inner wall of the guide sliding groove 221, the first hanger wheel body 22 is prevented from being pulled out from both sides of the guide sliding rail 111, so as to provide more stable cooperation between the first hanger wheel body 22 and the hanger rail body 11.

[0062] The limit pull groove 112 is arranged at both ends of the overhead rail body 11 respectively; the first suspension wheel seat 21 is provided with a locking hole 214, and the locking hole 214 is matched with a locking piece 113; the first suspension wheel assembly 20 and the relative position of the overhead rail body 11 are locked by the locking piece 113 sequentially penetrating through the locking hole 214 and the limit pull groove 112. Of course, the second suspension wheel assembly 30 and the other end of the overhead rail body 11 can be fixed according to actual needs, and the opening and closing direction of the folding door can be switched.

[0063] As an extension of the present embodiment, a plurality of door panels can be arranged according to actual conditions, the plurality of door panels are connected through hinges, the top is connected with the overhead rail assembly 10 through the suspension wheel assembly, and the bottom is also connected with the ground rail assembly 50 through the limit pulley, so that the folding door with different widths is realized. Although some components and embodiments of the present application have been illustrated and described, many modifications and changes (for example, changes in size, dimension, structure, shape and proportion of each element, mounting arrangement, material use, color, orientation, etc.) can be made by those skilled in the art without departing from the scope and spirit of the claims.

[0064] Finally, it should be noted that: the above-mentioned embodiments are only preferred embodiment modes of the present application, and cannot be used to limit the scope of protection of the present application, and any non-substantial changes and replacements made by those skilled in the art on the basis of the present application all belong to the scope of protection required by the present application.

Claims

1. A folding door structure, characterized by The application relates to a door structure, which comprises a hanging rail assembly, a first suspension wheel assembly, a second suspension wheel assembly and a door plate assembly. The hanging rail assembly comprises a hanging rail body, and a guide sliding rail is formed at the top of the hanging rail body. The first suspension wheel assembly comprises a first suspension wheel seat and a first suspension wheel body, one end of the first suspension wheel seat is slidably connected to the guide sliding rail through the first suspension wheel body, and the other end of the first suspension wheel seat forms a first mounting part. The second suspension wheel assembly comprises a second suspension wheel seat and a second suspension wheel body, one end of the second suspension wheel seat is slidably connected to the guide sliding rail through the second suspension wheel body, and the other end of the second suspension wheel seat forms a second mounting part. The door plate assembly comprises a first door plate and a second door plate, a first door shaft is arranged at the top of the first door plate, the first door shaft is hingedly connected to the first mounting part, a second door shaft is arranged at the top of the second door plate, the second door shaft is hingedly connected to the second mounting part, the side surface of the first door plate is hingedly connected to the side surface of the second door plate, so that the first door plate and the second door plate can be relatively rotated to form a folding state and an unfolding state.

2. A folding door structure according to claim 1, characterized in that The application further relates to a ground rail assembly, which is arranged below the hanging rail assembly in the direction of gravity, and comprises a ground rail body, countersunk screws and a first expansion pipe, a plurality of connecting through holes are formed in the ground rail body along the length direction of the ground rail body, the first expansion pipe is embedded in the ground, and the countersunk screws are connected to the first expansion pipe through the connecting through holes, so that the ground rail body is fixed to the ground.

3. A folding door structure according to claim 2, characterized in that A limiting sliding groove is formed in the ground rail body, and the limiting sliding groove is arranged in the same direction as the guide sliding rail. A first limiting pulley is fixed to the bottom of the first door plate, the first limiting pulley is rollingly connected to the limiting sliding groove, a second limiting pulley is fixed to the bottom of the second door plate, and the second limiting pulley is rollingly connected to the limiting sliding groove.

4. The folding door structure of claim 1, wherein The first door plate comprises a first connecting frame, the first connecting frame comprises a first top edge frame, a first left edge frame, a first right edge frame and a first bottom edge frame, and a first panel is arranged between the first top edge frame, the first left edge frame, the first right edge frame and the first bottom edge frame.

5. A folding door structure according to claim 4, characterized in that The first door shaft is fixed to the end of the first top edge frame through a first connecting plate, and a anti-disengagement part is formed at the top of the first door shaft. A connecting groove is formed in the first mounting part, the connecting groove has an opening end, the first door shaft enters the connecting groove through the opening end of the connecting groove, and the anti-disengagement part limits the axial disengagement of the first door shaft. An anti-disengagement hole is arranged at the opening end of the connecting groove, and an anti-disengagement pin is matched in the anti-disengagement hole, the end of the anti-disengagement pin enters the connecting groove through the anti-disengagement hole, and the anti-disengagement pin limits the disengagement of the first door shaft from the opening end of the connecting groove.

6. The folding door structure of claim 4, wherein The second door plate comprises a second connecting frame, the second connecting frame comprises a second top edge frame, a second left edge frame, a second right edge frame and a second bottom edge frame, and a second panel is arranged between the second top edge frame, the second left edge frame, the second right edge frame and the second bottom edge frame. The first right edge frame is hingedly connected to the second left edge frame, so that the first door plate and the second door plate can be relatively rotated. The first door shaft is arranged close to the first left edge frame, and the second door shaft is arranged close to the second right edge frame.

7. A folding door structure according to claim 6, characterized in that The first panel and the second panel are glass panels, and a plurality of support strips are arranged between the glass panels.

8. The folding door structure of claim 1, wherein The hanging rail body is provided with a plurality of connecting through holes along the length direction thereof; The hanging rail assembly further comprises an isolation sleeve, a bolt and a second expansion pipe; the second expansion pipe is used for being pre-buried in a wall surface; and the bolt is sequentially connected with the connecting through hole, the isolation sleeve and the second expansion pipe.

9. The folding door structure of claim 1, wherein The first suspension wheel body is circumferentially provided with a guide sliding groove, and the guide sliding groove is matched with the guide sliding rail; the first suspension wheel body is slidingly connected to the hanging rail body through cooperation of the guide sliding groove and the guide sliding rail.

10. The folding door structure of claim 1, wherein Limiting pull grooves are respectively arranged at both ends of the hanging rail body. A locking hole is arranged on the first suspension wheel seat, and a locking member is matched with the locking hole; the relative position of the first suspension wheel assembly and the hanging rail body is locked through the locking member sequentially penetrating the locking hole and the limiting pull groove.

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