Folding door with upper track for bearing load

Abstract

The folding door comprises a frame, a leaf frame and an upper pulley assembly, the frame comprises an upper frame, a mounting groove is formed in the upper frame, a rail is arranged in the mounting groove, the upper pulley assembly comprises an upper pulley and a connecting piece, the upper pulley and the rail are arranged in a sliding mode, and the upper pulley is connected with the leaf frame through the connecting piece. When the fan frame is subjected to external force, the fan frame moves relative to the frame; the upper frame is provided with an opening facing the external space, the mounting groove and the opening form an open space, and the upper pulley is detachably arranged in the open space. Compared with a traditional lower track load-bearing folding door, the upper track load-bearing design is adopted, the load-bearing capacity of the folding door is improved, and even if the door leaf is high, the pulley device in the lower frame cannot bear too large pressure, so that the service life is prolonged; and secondly, when the upper pulley needs to be maintained or replaced, the upper pulley can be maintained or replaced without disassembling the whole door frame, and the cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of folding doors, and in particular to a folding door with an upper track bearing load. Background Art

[0002] With the development of society, people's pursuit of quality of life is getting higher and higher. The size and width of the partition entrance doors required by houses are getting wider and wider, and the height is also getting higher and higher. The traditional swing doors cannot be used in this scenario because of the load-bearing of the hinges and the large space they take up when opened. The sliding doors can only open half of the area at most when opened, which goes against the original intention of pursuing a large-area entrance door and cannot be used in the same scenario. Therefore, people have designed a door and window system that can meet the requirements of high load-bearing, small opening space and large opening area - the traditional folding door system.

[0003] However, the existing traditional folding door systems on the market usually use a lower track to bear the weight of all door leaves. This method has the problem that the higher the door leaves are, the greater the tilting angle will be, which can easily cause the lower track, lower pulley and guide wheel to be subjected to excessive pressure, affecting the service life or even making them unable to be used normally. There are also a few folding doors that use upper tracks to bear the weight, but their tracks are generally closed tracks, and the pulleys installed in them are difficult to disassemble and repair, resulting in high costs. Summary of the invention

[0004] The purpose of the present invention is to provide a folding door with an upper track bearing the load, aiming to solve the technical problem that the existing folding doors have high costs because the tracks are generally closed tracks and the pulleys installed therein are difficult to disassemble and repair.

[0005] In order to solve the above technical problems, the purpose of the present invention is achieved through the following technical solutions:

[0006] The present invention provides a folding door supported by an upper track, comprising a frame, a sash frame and an upper pulley assembly, wherein the frame comprises an upper frame, a mounting groove is arranged in the upper frame, a track is arranged in the mounting groove, the upper pulley assembly comprises an upper pulley and a connecting piece, the upper pulley is slidably arranged with the track, the upper pulley is connected to the sash frame through the connecting piece, and when the sash frame is subjected to an external force, the sash frame moves relative to the frame; the upper frame is provided with an opening facing the external space, the mounting groove and the opening form an open space, and the upper pulley is detachably arranged in the open space.

[0007] Furthermore, the upper pulley is installed in the installation groove, the upper pulley is connected to the connecting member, and the fan frame is suspended and installed on the upper frame through the connecting member.

[0008] Furthermore, a protrusion is provided in the track, and a groove is provided on the outer edge of the upper pulley, and the groove slides relative to the protrusion.

[0009] Furthermore, the frame also includes a lower frame, the lower frame is provided with a guide groove, a lower guide wheel is provided in the guide groove, one end of the lower guide wheel is movably connected to the guide groove, and the other end is fixedly connected to the fan frame.

[0010] Furthermore, the frame also includes two vertical frames, the upper frame is located at the top of the vertical frame and fixedly connected to the vertical frame, the lower frame is located at the bottom of the vertical frame and fixedly connected to the vertical frame, and the upper frame, the lower frame and the vertical frame together enclose a door leaf space.

[0011] Furthermore, the number of the sash frames is several, and the several sash frames are arranged transversely in the door leaf space; a hinge is provided between two adjacent sash frames, and one of the sash frames close to the two vertical side frames is hinged to the vertical side frames through the hinge.

[0012] Furthermore, a door leaf is provided inside the leaf frame, and a sealing member is provided between the door leaf and the leaf frame to form a good sealing effect between the door leaf and the leaf frame.

[0013] Furthermore, the hinged component is a hinge.

[0014] Furthermore, a mounting piece is provided between the fan frame and the connecting piece, and the upper pulley is fixedly connected to the fan frame via the connecting piece and the mounting piece.

[0015] Furthermore, a decorative cover is provided on one side of the upper pulley.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the present invention connects the upper frame and the sash frame to each other through the upper pulley, and utilizes the upper pulley to slide and connect with the track in the upper frame to make the sash frame reciprocate in the frame, and the upper pulley and the track support the sash frame to play the role of upper track load-bearing. Compared with the traditional lower track load-bearing folding door, the present invention adopts the upper track load-bearing design, and the load-bearing capacity of the folding door is improved. Even if the door leaf is high, it will not cause the pulley device in the lower frame to bear excessive pressure, thereby extending the service life; secondly, when the upper pulley needs to be repaired or replaced, the present invention can repair or replace the upper pulley without disassembling the entire door frame, and the cost paid is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 It is a cross-sectional view of the frame of a conventional folding door structure commonly found on the market;

[0019] Figure 2 It is a cross-sectional view of the movable fan of a conventional folding door structure commonly found on the market;

[0020] Figure 3 It is a vertical section diagram of a conventional folding door structure commonly found on the market;

[0021] Figure 4 A cross-sectional view of a frame of a folding door supported by an upper track provided in an embodiment of the present invention;

[0022] Figure 5 A cross-sectional view of a sash frame of a folding door supported by an upper track provided in an embodiment of the present invention;

[0023] Figure 6 A vertical cross-sectional view of a folding door with an upper track bearing load provided by an embodiment of the present invention;

[0024] Figure 7 A cross-sectional view of a folding door with an upper track bearing the load provided in an embodiment of the present invention.

[0025] Reference numerals:

[0026] 1. Frame; 11. Upper frame; 111. Track; 1111. Protrusion; 112. Mounting groove; 12. Lower frame; 121. Guide groove; 13. Vertical frame; 2. Sash frame; 21. Hinge; 22. Door leaf; 23. Seal; 24. Mounting piece; 3. Upper pulley; 31. Groove; 32. Connector; 33. Decorative cover; 4. Lower guide wheel;

[0027] 5. Frame; 51. Vertical frame; 52. Vertical frame auxiliary frame; 53. Lower frame; 531. Track; 532. Side guard; 54. Upper frame; 541. Guide groove; 6. Movable fan; 7. Lower pulley; 8. Upper guide wheel. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0030] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0031] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] See also Figure 1-3, which discloses a common traditional folding door structure on the market, wherein the main structure is composed of a frame 5 and a movable leaf 6, wherein the frame 5 is composed of a vertical frame 51, a vertical frame auxiliary frame 52, a lower frame 53, and an upper frame 54, wherein the lower frame 53 includes a track 531 and a retaining edge 532, and the upper frame 54 includes a guide groove 541; wherein the movable leaf 6 is composed of a movable leaf profile and a pressing line. Secondly, the standard hardware of the traditional folding door structure includes a lower pulley 7 and an upper guide wheel 8, wherein the lower pulley 7 acts on the track 531 to bear the load, and wherein the upper guide wheel 8 acts in the guide groove 541 to guide. The lower pulley 7 acts on the track 531. Therefore, when the size of the movable fan 6 is higher, its own weight will increase, and the inclination angle will also increase along the track 531, so that the surface contact between the lower pulley 7 and the track 531, and between the upper guide wheel 8 and the guide groove 541 will become point contact. Therefore, higher requirements will be placed on the track 531, the lower pulley 7 and the upper guide wheel 8, and the service life will also be greatly affected, and even the problem of being unusable will occur. Moreover, when there is wind pressure or other forces, the movable fan 6 will even swing, which is likely to cause safety hazards. The traditional folding door structure needs to install the lower pulley 7 and the upper guide wheel 8 to meet the basic requirement that the movable fan 6 can slide, and for aesthetic considerations, a retaining edge 532 is often designed on the lower frame 53 to hide the lower pulley 7. Therefore, during installation, the lower pulley 7 needs to be installed in the lower frame 53 in a slot-through solution before the frame 5 can be assembled. Therefore, this design often leads to the problem that when the lower pulley 7 needs to be repaired or replaced, the entire door frame needs to be disassembled before the lower pulley 7 can be repaired or replaced, which results in a very high cost.

[0033] See also Figures 4 to 7 A specific embodiment of the present invention discloses a folding door with an upper track bearing load, comprising a frame 1, a sash frame 2 and an upper pulley assembly, wherein the frame 1 comprises an upper frame 11, a mounting groove 112 is provided in the upper frame 11, a track 111 is provided in the mounting groove 112, the upper frame 11 is provided with a track 111, the upper pulley assembly comprises an upper pulley 3 and a connecting member 32, the upper pulley 3 is slidably arranged with the track 111, the upper pulley 3 is connected to the sash frame 2 through the connecting member 32, and when the sash frame 2 is subjected to external force, the sash frame 2 moves relative to the frame 1.

[0034] Specifically, in this embodiment, the upper frame 11 is made of high-strength material to ensure that it can withstand the overall weight of the folding door and the dynamic load during operation. On the rear side of the upper frame 11, a mounting groove 112 matching the upper pulley 3 is provided. The shape and size of the mounting groove 112 are precisely adjusted according to the design of the upper pulley 3 to ensure that the upper pulley 3 can be stably installed therein. The depth of the mounting groove 112 can be sufficient to accommodate the upper pulley 3 and its connecting member 32, while leaving an appropriate gap for sliding and adjustment. A precision-machined track 111 is provided in the mounting groove 112, which provides a stable and smooth sliding path for the pulley device. The cross-sectional shape of the track 111 is optimized to reduce the friction and wear of the pulley during the sliding process, while ensuring the accuracy and stability of the sliding. The upper pulley 3 is a key component connecting the sash frame 2 and the track 111. The pulley is made of wear-resistant and low-friction materials to ensure stability and durability for long-term use. One end of the upper pulley 3 is connected to the track 111 through a precision bearing or sliding mechanism to ensure that the pulley slides smoothly on the track 111. The other end is firmly connected to the top of the sash frame 2 by bolts, nuts or other fasteners to form a stable load-bearing structure. The sash frame 2, as the main part of the folding door, is composed of multiple sash frame units connected together by a connector 32 to form a foldable continuous structure. Each sash frame unit is equipped with an upper pulley 3 to ensure that the entire folding door can slide smoothly and smoothly during opening and closing. Due to the sturdy design of the upper frame 11 and the track 111, and the stable connection between the upper pulley 3 and the sash frame 2 through the connector 32, the folding door can easily withstand a large weight and is suitable for various high-load application scenarios, while reducing shaking and instability caused by gravity. Secondly, the load-bearing design of the upper track 111 reduces the use and wear of the lower pulley, thereby reducing maintenance costs and time costs.

[0035] like Figure 6 As shown, the upper frame 11 is provided with an opening toward the external space, the mounting groove 112 and the opening form an open space, and the upper pulley 3 is detachably disposed in the open space.

[0036] Specifically, the upper frame 11 is provided with an opening toward the external space, and this design is mainly for the convenience of installation, removal and maintenance of the upper pulley 3. The shape and size of the opening are usually determined according to the shape and size of the upper pulley 3 to ensure that the upper pulley 3 can smoothly enter and leave the open space. The upper pulley 3 is connected to the sash frame 2 by a specific installation method and is designed to be detachable. This means that when necessary, the upper pulley 3 can be easily taken out of the open space for replacement or maintenance. This design improves the maintainability and service life of the folding door and reduces the maintenance cost.

[0037] like Figure 6As shown, the upper pulley 3 is installed in the installation groove 112 , the upper pulley 3 is connected to the connecting member 32 , and the sash frame 2 is suspended and installed on the upper frame 11 through the connecting member 32 .

[0038] Specifically, the sash frame 2 is suspended in the mounting groove 112 of the upper frame 11 through the connector 32, and the weight and dynamic load of the sash frame 2 will be transmitted to the upper frame 11 and the track 111 through the connector 32 and the upper pulley 3. After the installation is completed, the position and angle of the sash frame 2 are adjusted to ensure that the gap and contact angle between it and the track 111 are in the optimal state. The connector 32 and the sash frame 2 are firmly fixed to the upper frame 11 by tightening bolts, nuts or other fixings. Through the synergistic effect of the upper frame 11, the mounting groove 112, the upper pulley 3 and the connector 32, the sash frame 2 can be stably suspended on the upper frame 11 and maintain appropriate gaps and contacts during the sliding process. This helps to reduce looseness or deformation caused by vibration or impact, while reducing the use and wear of the lower pulley, thereby improving the structural stability and service life of the folding door.

[0039] like Figure 4 and Figure 6 As shown, a protrusion 1111 is provided in the track 111 , and a groove 31 is provided on the outer edge of the upper pulley 3 , and the groove 31 slides relative to the protrusion 1111 .

[0040] Specifically, the outer edge of the upper pulley 3 is provided with a groove 31, which cooperates with the protrusion 1111 in the track 111 to ensure good contact and support with the protrusion 1111 of the track 111 during the sliding process. The design of the protrusion 1111 in the track 111 increases the contact area and friction between the track 111 and the upper pulley 3, thereby improving the stability and accuracy of the sliding. This reduces the shaking and instability during the sliding process, making the folding door more stable and smooth during the opening and closing process.

[0041] like Figure 6 As shown, the frame 1 also includes a lower frame 12 , which is provided with a guide groove 121 , in which a lower guide wheel 4 is provided, one end of the lower guide wheel 4 is movably connected to the guide groove 121 , and the other end is fixedly connected to the fan frame 2 .

[0042] Specifically, the guide groove 121 is a structure provided on the lower frame 12, and is used to guide the sliding of the lower guide wheel 4. In this embodiment, one end of the lower guide wheel 4 is connected to the guide groove 121, and the other end is fixedly connected to the bottom of the sash frame 2 by screws. Through the connection between the lower guide wheel 4 and the guide groove 121, the door leaf 22 can slide along a predetermined track during the opening and closing process, thereby improving the stability of the door leaf 22. This design can also effectively prevent the door leaf 22 from shaking or deflecting during the sliding process, ensuring that the movement track of the door leaf 22 is accurate. The shape and size of the guide groove 121 are optimized according to the shape and sliding requirements of the lower guide wheel 4. The cross-sectional shape of the guide groove 121 can be a straight groove, a dovetail groove, or other shapes, depending on the design and application scenario of the folding door.

[0043] Under the influence of gravity, the fan frame 2 is in a naturally vertical state. If there is wind pressure or other forces, the lower guide wheel 4 acts in the guide groove 121 to guide the movement of the fan frame 2, so that the upper pulley 3 and the track 111, as well as the lower guide wheel 4 and the guide groove 121 always maintain surface contact, which greatly improves the service life of the upper pulley 3, the track 111 and the lower guide wheel 4.

[0044] like Figure 6-7 The frame 1 also includes two vertical frames 13. The upper frame 11 is located at the top of the vertical frame 13 and is fixedly connected to the vertical frame 13. The lower frame 12 is located at the bottom of the vertical frame 13 and is fixedly connected to the vertical frame 13. The upper frame 11, the lower frame 12 and the vertical frame 13 together enclose a door leaf space.

[0045] Specifically, the vertical frame 13 is usually designed as a long strip, and its height and width are determined according to the size of the door leaf 22 and the design requirements. The upper frame 11 is located at the top of the vertical frame 13 and is fixedly connected to the vertical frame 13. The connection method can be welding, bolt connection, snap connection or other reliable connection methods. During the connection process, it is necessary to ensure that the connection between the upper frame 11 and the vertical frame 13 is firm and stable, and there is no obvious gap or deformation. The lower frame 12 is located at the bottom of the vertical frame 13 and is fixedly connected to the vertical frame 13. The connection method can also be welding, bolt connection, snap connection, etc. During the connection process, in addition to ensuring the firmness and stability of the connection, it is also necessary to pay attention to the gap between the lower frame 12 and the ground or track 111 to ensure that the folding door can be opened and closed smoothly. The upper frame 11, the lower frame 12 and the vertical frame 13 are assembled according to the design requirements to form a complete frame structure. During the assembly process, it should be ensured that the connection between the components is firm and stable, and the overall structure is flat and there is no obvious deformation or gap phenomenon. Through the structure and connection of the frame 1, the upper frame 11, the lower frame 12 and the vertical frame 13 together enclose a door leaf space. This space is used to install the door leaf 22 of the folding door, ensuring that the door leaf 22 can stably slide on the track 111 during opening and closing, and maintain good sealing and sound insulation.

[0046] like Figure 7 As shown, there are several leaf frames 2, and the leaf frames 2 are arranged in sequence from left to right in the door leaf space.

[0047] Specifically, according to the design requirements and usage scenarios of the folding door, the number of the sash frames 2 can be several. These sash frames 2 are usually arranged in sequence from left to right in the door leaf space to form a continuous folding structure. The number of sash frames 2 can be flexibly adjusted according to the width, height and required folding effect of the door leaf 22. By arranging several sash frames 2 in sequence, the folding door can be flexibly unfolded and folded, thereby making full use of the door leaf space. This helps to save indoor space and make the indoor layout more reasonable and beautiful.

[0048] like Figure 6-7 As shown, the sash frame 2 is movably connected in the door leaf space, a hinge 21 is provided between two adjacent sash frames 2, and one of the sash frames 2 close to the two vertical side frames 13 is hinged to the vertical side frames 13 through the hinge 21.

[0049] Specifically, the sash frame 2 is one of the core components of the folding door, which is used to support and protect the door leaf 22. The design of the sash frame 2 usually takes into account strength, weight and aesthetics. In this embodiment, the sash frame 2 is made of a light and strong material, such as aluminum alloy or stainless steel, to ensure that it can bear the weight of the door leaf 22 and maintain structural integrity during long-term use. During installation, one end of the hinge 21 is fixed to the sash frame 2, and the other end is fixed to the vertical frame 13 or the adjacent sash frame 2. By adjusting the fastening degree and angle of the hinge 21, the stability and smoothness of the sash frame 2 during opening and closing can be ensured.

[0050] like Figure 6-7 As shown, a door leaf 22 is further provided inside the leaf frame 2 , and a seal 23 is provided between the door leaf 22 and the leaf frame 2 to form a good sealing effect between the door leaf 22 and the leaf frame 2 .

[0051] Specifically, in order to form a good sealing effect between the door leaf 22 and the leaf frame 2, and prevent external factors such as dust, water vapor and noise from entering the room, especially in occasions requiring high air tightness and water tightness (such as bathroom doors, kitchen doors, etc.), a seal 23 is provided at the contact portion between the leaf frame 2 and the door leaf 22. The seal 23 is usually made of elastic material (such as rubber, silicone, EPDM, etc.), has good elasticity and wear resistance, and can be tightly attached to the leaf frame 2 when the door leaf 22 is closed, forming an effective sealing barrier.

[0052] It can be understood that the articulated member 21 in this embodiment is a hinge, and in other embodiments it can also be a hinge or other structure, which can be specifically configured according to actual conditions.

[0053] like Figure 6 As shown, a mounting member 24 is provided between the fan frame 2 and the connecting member 32 , and the upper pulley 3 is fixedly connected to the fan frame 2 via the connecting member 32 and the mounting member 24 .

[0054] Specifically, the mounting member 24 is a key component for connecting the sash frame 2 and the connecting member 32, and its design needs to match the sash frame 2 and the connecting member 32. The mounting member 24 in this embodiment is a screw, and in other embodiments, it can also be a connecting structure such as a rivet or a bolt, which can be specifically set according to actual conditions. Through the synergistic effect of the mounting member 24, the connecting member 32 and the upper pulley 3, the connection between the sash frame 2 and the upper pulley 3 is more firm and reliable. This combined installation method can effectively reduce the looseness or deformation caused by vibration or impact, and improve the structural stability of the folding door or sliding door.

[0055] like Figure 6 As shown, a decorative cover 33 is provided on one side of the upper pulley 3 .

[0056] Specifically, after installing the upper pulley 3, the decorative cover 33 can be installed to hide the upper pulley 3, thereby improving the aesthetics of the folding door. The decorative cover 33 can also play a role in safety protection. The exposed upper pulley 3 may have certain safety hazards, such as sharp edges that may scratch people or damage items. By installing the decorative cover 33, these risks can be effectively reduced. In some cases, the upper pulley 3 may generate noise during the sliding process. The decorative cover 33 can be used as a sound insulation material to reduce the friction noise between the upper pulley 3 and the track 111, thereby improving the user experience of the folding door. The decorative cover 33 can also provide certain protection for the upper pulley 3 to prevent dust, dirt and other debris from entering the upper pulley 3 and affecting its sliding effect and life.

[0057] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A folding door with upper track bearing, characterized in that: It comprises a frame, a fan frame and an upper pulley assembly, wherein the frame comprises an upper frame, a mounting groove is arranged in the upper frame, a track is arranged in the mounting groove, the upper pulley assembly comprises an upper pulley and a connecting piece, the upper pulley is slidably arranged with the track, the upper pulley is connected with the fan frame through the connecting piece, and when the fan frame is acted by an external force, the fan frame moves relative to the frame; The upper frame is provided with an opening toward the external space, the mounting groove and the opening form an open space, and the upper pulley is detachably arranged in the open space.

2. The upper track load-bearing folding door according to claim 1, characterized in that: The upper pulley is installed in the installation groove, the upper pulley is connected to the connecting member, and the fan frame is suspended and installed on the upper frame through the connecting member.

3. The upper track load-bearing folding door according to claim 2, characterized in that: A protrusion is arranged in the track, and a groove is arranged on the outer edge of the upper pulley, and the groove slides relative to the protrusion.

4. The upper track load-bearing folding door according to claim 1, characterized in that: The frame also includes a lower frame, the lower frame is provided with a guide groove, a lower guide wheel is provided in the guide groove, one end of the lower guide wheel is movably connected to the guide groove, and the other end is fixedly connected to the fan frame.

5. The upper track load-bearing folding door according to claim 4, characterized in that: The frame also includes two vertical frames, the upper frame is located at the top of the vertical frame and fixedly connected to the vertical frame, the lower frame is located at the bottom of the vertical frame and fixedly connected to the vertical frame, and the upper frame, the lower frame and the vertical frame together enclose a door leaf space.

6. The upper track load-bearing folding door according to claim 5, characterized in that: There are a plurality of sash frames, which are arranged transversely in the door leaf space; a hinge is provided between two adjacent sash frames, and one of the sash frames close to the two vertical side frames is hinged to the vertical side frames through the hinge.

7. The upper track load-bearing folding door according to claim 1, characterized in that: A door leaf is also arranged inside the leaf frame, and a sealing member is arranged on the door leaf and the leaf frame to form a good sealing effect between the door leaf and the leaf frame.

8. The upper track load-bearing folding door according to claim 6, characterized in that: The hinged part is a hinge.

9. The upper track load-bearing folding door according to claim 2, characterized in that: A mounting piece is provided between the fan frame and the connecting piece, and the upper pulley is fixedly connected to the fan frame through the connecting piece and the mounting piece.

10. The upper track load-bearing folding door according to claim 9, characterized in that: A decorative cover is provided on one side of the upper pulley.

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