Pulley assembly and linkage door system comprising same

Abstract

The utility model discloses a pulley assembly and a linkage door system comprising the same. The pulley assembly is used for the linkage door system and comprises a sliding seat, a pulley assembly and a pulley assembly, the first belt pulley is connected to the first end of the sliding seat; the fixed seat is used for being fixed to a transverse frame of the door leaf, and the second end of the fixed seat and the second end of the sliding seat are oppositely arranged; and the elastic piece is arranged between the fixed seat and the sliding seat, and the elastic piece is configured to apply acting force away from the fixed seat to the sliding seat. Therefore, by integrating the first belt pulley on the sliding seat, the number of parts is reduced, the mounting steps are simplified, the mounting efficiency is improved, the overall design of the pulley assembly is more compact, the occupied space is small, and the attractiveness and the space utilization rate of the door leaf are improved; in the installation process, automatic tightening of the belt can be achieved through simple operation, additional adjustment is not needed, installation convenience is improved, and automatic and accurate adjustment of the tightening degree of the belt is achieved.

Description

Technical Field

[0001] This utility model relates to the field of door and window hardware accessories, and in particular to pulley assemblies and linkage door systems including them. Background Technology

[0002] Among sliding doors, there is a type called a linked door, which refers to a door where, as one door opens and closes, the other doors open and close slowly in tandem. A linked door typically consists of multiple doors, each located on a separate track and interconnected via a linkage mechanism. Specifically, the linkage mechanism includes a belt, a first pulley, and a linkage element. In existing technology, the linkage mechanism and load-bearing rollers of a linked door are usually located on the top and bottom sides of the door leaf, respectively. However, with changing market demands, the need to integrate the linkage mechanism and load-bearing rollers onto the same side of the door leaf is becoming increasingly prominent. While this modification improves aesthetics and space utilization, it also introduces problems such as installation complexity and difficulty in adjusting belt tension. Utility Model Content

[0003] In order to overcome at least one of the defects described in the prior art, the present invention provides a pulley assembly and a linkage door system including the pulley assembly, which is designed to simplify the installation process, optimize the structural compactness, and realize automatic adjustment of belt tension.

[0004] The technical solution adopted by this utility model to solve its problem is:

[0005] A pulley assembly for a linkage door system includes: a sliding seat with rollers; a first pulley connected to a first end of the sliding seat; a fixed seat for fixing to the horizontal frame of the door leaf, the fixed seat and the second end of the sliding seat being disposed opposite each other; and an elastic element disposed between the fixed seat and the sliding seat, the elastic element being configured to apply a force away from the fixed seat to the sliding seat.

[0006] According to some embodiments of the present invention, the first end of the elastic element is connected to the fixed base, the second end of the sliding base is provided with a second connecting block, and the second end of the elastic element is engaged with the second connecting block.

[0007] According to some embodiments of the present invention, the second connecting block has a second slot and a second guide surface, and the second end of the elastic member can move along the second guide surface until it is engaged in the second slot.

[0008] According to some embodiments of the present invention, the second connecting block is a horizontally extending column, and the second guide surface is inclined to the axis of the second connecting block.

[0009] According to some embodiments of the present invention, the cross-section of the second connecting block in the direction perpendicular to the axis gradually decreases in the direction away from the second slot.

[0010] According to some embodiments of the present invention, the axis of the first pulley is arranged in the vertical direction; the diameter of the first pulley is greater than the width of the roller in the horizontal direction.

[0011] According to some embodiments of the present invention, the pulley assembly further includes an adjusting member, a transmission mechanism, and a roller seat. The sliding seat is movably connected to the roller seat, the roller is disposed on the roller seat, the transmission mechanism is disposed between the sliding seat and the roller seat, the adjusting member is rotatably connected to the first end of the sliding seat, and the adjusting member and the transmission mechanism are drively connected. When the adjusting member rotates, the sliding seat can move up and down relative to the roller seat under the drive of the transmission mechanism.

[0012] According to some embodiments of the present invention, the first end of the sliding seat is provided with a connecting seat, the first pulley is installed on the connecting seat, the connecting seat is provided with a clearance hole, and the clearance hole is disposed opposite to the adjusting member.

[0013] According to some embodiments of the present invention, the connecting seat is detachably connected to the first end of the sliding seat, and the second connecting block is detachably connected to the second end of the sliding seat.

[0014] In addition, this utility model also provides a linkage door system, including the pulley assembly as described above, and also includes a door / window sash, a belt and a second pulley. The door / window sash is provided with a horizontal frame, the horizontal frame is provided with a mounting groove, the sliding seat and the fixed seat are provided in the mounting groove, the first pulley is located at the first end of the horizontal frame, the second pulley is located at the second end of the horizontal frame, and the belt is wound around the first pulley and the second pulley.

[0015] According to some embodiments of the present invention, the mounting groove has a groove top wall and a limiting wall, the limiting wall and the groove top wall are arranged opposite to each other, the fixing seat has an abutment wall located above the limiting wall, and the fixing seat is provided with a first fastener, the first fastener can abut against the groove top wall to make the abutment wall press down on the limiting wall.

[0016] According to some embodiments of the present invention, the linkage door system further includes a second fastener. When the first pulley is subjected to a force exerted by the elastic member on the sliding seat away from the fixed seat, causing the belt to be taut, the second fastener is used to fix the relative position of the first pulley and the mounting groove.

[0017] In summary, the pulley assembly and the linkage door system including it provided by this utility model have at least the following technical effects:

[0018] By integrating the first pulley into the sliding seat, the number of parts is reduced, the installation steps are simplified, and the installation efficiency is improved. The overall design of the pulley assembly is more compact, occupies less space, and enhances the aesthetics and space utilization of the door leaf. Furthermore, during installation, the sliding seat can be pressed against the elastic element to compress it, and then the sliding seat can be released. The elastic element applies a force away from the fixed seat to the sliding seat, causing it to automatically move to the optimal installation position. The first pulley moves synchronously with the sliding seat, thus achieving automatic belt tensioning. In this way, by utilizing the elastic element, automatic belt tensioning can be achieved through simple operation during installation without additional adjustments, improving the convenience of installation and enabling automatic and precise adjustment of belt tension. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the pulley assembly according to an embodiment of the present invention from a first-view perspective;

[0020] Figure 2 This is an exploded view of the pulley assembly according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0022] Figure 4 This is a schematic diagram of the pulley assembly according to an embodiment of the present invention from a second perspective.

[0023] Figure 5 This is a schematic diagram of the structure of the door and window sash according to an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram of the assembly structure of the horizontal frame and pulley assembly in a third-person perspective according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the horizontal border structure of an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the assembly structure of the horizontal frame and pulley assembly in a fourth-angle view according to an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the assembly structure of the horizontal frame and pulley assembly (belt not shown) of an embodiment of the present invention from a fifth perspective.

[0028] The meanings of the reference numerals in the attached figures are as follows:

[0029] 1. Sliding seat; 11. Second connecting block; 111. Second slot; 112. Second guide surface; 12. Limiting groove; 2. First pulley; 3. Fixed seat; 31. First connecting block; 32. Abutting wall; 33. First fastener; 4. Elastic element; 5. Roller seat; 51. Roller; 6. Transmission mechanism; 61. Guide column; 62. Transmission seat; 621. Guide groove; 7. Adjusting element; 8. Connecting seat; 81. Positioning wall; 82. Second fastener; 83. Clearance hole; 9. Door / window sash; 91. Horizontal frame; 92. Mounting groove; 921. Groove top wall; 922. Limiting wall; 10. Belt; 20. Second pulley; 30. Linkage element. Detailed Implementation

[0030] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0031] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] Please see Figures 1 to 7 This embodiment discloses a pulley assembly for a linkage door system. The pulley assembly includes a sliding seat 1, a first pulley 2, a fixed seat 3, and an elastic element 4. The sliding seat 1 is connected to the horizontal frame 91 of the door leaf to guide the movement of the door leaf. The sliding seat 1 can ensure that the door leaf can move smoothly and steadily along the track. The first pulley 2 is connected to the first end of the sliding seat 1 and is used for the belt 10 to be wound to realize the linkage function between the door leaves. The fixed seat 3 is fixed to the horizontal frame 91 of the door leaf. The second ends of the fixed seat 3 and the sliding seat 1 are arranged opposite each other. The fixed seat 3 serves as a support point and together with the sliding seat 1, it forms the basic frame of the pulley assembly. The elastic element 4 is disposed between the fixed seat 3 and the sliding seat 1. The elastic element 4 is configured to apply a force away from the fixed seat 3 to the sliding seat 1.

[0035] The pulley assembly provided in this embodiment reduces the number of parts, simplifies the installation steps, and improves installation efficiency by integrating the first pulley 2 into the sliding seat 1. The overall design of the pulley assembly is more compact, occupies less space, and improves the aesthetics and space utilization of the door leaf. During installation, the sliding seat 1 can be pressed against the elastic element 4 to compress the elastic element 4, and then the sliding seat 1 can be released. The elastic element 4 applies a force away from the fixed seat 3 to the sliding seat 1, which can make the sliding seat 1 automatically move to the optimal installation position. The first pulley 2 moves synchronously with the sliding seat 1, thereby achieving the purpose of automatic tensioning of the belt 10. In this way, by utilizing the function of the elastic element 4, the belt 10 can be automatically tensioned through simple operation during the installation process without additional adjustment, which improves the convenience of installation and enables automatic and precise adjustment of the belt 10 tension.

[0036] like Figure 1 and Figure 2 As shown, preferably, in this embodiment, the first end of the elastic element 4 is connected to the fixed base 3, and the second end of the sliding base 1 is provided with a second connecting block 11, with the second end of the elastic element 4 snapped into the second connecting block 11. Thus, the snap-fit ​​design of the elastic element 4 and the second connecting block 11 allows for easy disassembly of the sliding base 1 and the elastic element 4 when maintenance and replacement are required, reducing maintenance costs and improving the maintainability of the pulley assembly.

[0037] like Figure 2 and Figure 3 As shown, further, in this embodiment, the second connecting block 11 has a second slot 111 and a second guide surface 112. The second end of the elastic member 4 can move along the second guide surface 112 until it is engaged in the second slot 111. Thus, the design of the second guide surface 112 allows the second end of the elastic member 4 to move along a defined path during installation. This not only simplifies the installation steps but also ensures that the elastic member 4 can be accurately engaged in the second slot 111, thereby avoiding performance problems caused by improper installation. Furthermore, once the second end of the elastic member 4 is engaged in the second slot 111, the connection between the sliding seat 1 and the elastic member 4 becomes more stable due to the limiting effect of the slot. This stable connection helps improve the overall stability of the pulley assembly, ensuring excellent performance during long-term use. In addition, when it is necessary to disassemble or replace the elastic member 4, it can be easily removed from the second slot 111 by simply moving the second end of the elastic member 4 in the opposite direction of the second guide surface 112. This design greatly simplifies the disassembly process and reduces maintenance costs.

[0038] like Figure 2 and Figure 3As shown, preferably, in this embodiment, the second connecting block 11 is a laterally extending column, and the second guide surface 112 is inclined to the axis of the second connecting block 11. Thus, the inclined second guide surface 112 provides a clear installation path for the second end of the elastic member 4. During installation, the elastic member 4 can move smoothly along this inclined surface until it is engaged in the second slot 111. This design not only simplifies the installation steps but also improves the accuracy and convenience of installation.

[0039] like Figure 2 and Figure 3 As shown, more preferably, in this embodiment, the cross-section of the second connecting block 11 gradually decreases in the direction perpendicular to the axis away from the second slot 111. This gradually decreasing cross-section design of the second connecting block 11 provides a natural guiding path for the second end of the elastic member 4. During installation, the elastic member 4 can move smoothly along this gradually decreasing cross-section until it engages with the second slot 111. This design not only further simplifies the installation steps but also improves the accuracy and convenience of installation. Furthermore, when it is necessary to disassemble the elastic member 4, the gradually decreasing cross-section of the second connecting block 11 can also be utilized. By applying appropriate force, the second end of the elastic member 4 can easily slide out of the second slot 111 along the gradually decreasing cross-section. This design makes the disassembly process simpler and faster, reducing maintenance costs.

[0040] Specifically, in this embodiment, the second connecting block 11 has a cross-shaped cross-section perpendicular to the axis. This cross-shaped design maintains structural strength while effectively saving materials. This helps reduce production costs and improve the product's cost-effectiveness.

[0041] It should be noted that in some other embodiments, the cross-section of the second connecting block 11 in the direction perpendicular to the axis can also be circular or square, etc., whichever is selected according to actual needs, and is not limited here.

[0042] like Figure 2 As shown, specifically in this embodiment, the fixing base 3 is also provided with a first connecting block 31, and the first end of the elastic member 4 is engaged with the first connecting block 31; the shape and function of the first connecting block 31 are roughly the same as the shape and function of the second connecting block 11, and will not be described in detail here.

[0043] like Figure 1 , Figure 2 and Figure 4As shown, in this embodiment, the pulley assembly further includes an adjusting member 7, a transmission mechanism 6, and a roller seat 5. The sliding seat 1 is movably connected to the roller seat 5, the roller 51 is disposed on the roller seat 5, the transmission mechanism 6 is disposed between the sliding seat 1 and the roller seat 5, the adjusting member 7 is rotatably connected to the first end of the sliding seat 1, and the adjusting member 7 and the transmission mechanism 6 are connected in a transmission manner. When the adjusting member 7 rotates, the sliding seat 1 can move up and down relative to the roller seat 5 under the drive of the transmission mechanism 6.

[0044] like Figure 1 , Figure 2 and Figure 4 As shown, preferably, in this embodiment, the transmission mechanism 6 includes a guide post 61 and a transmission seat 62; the guide post 61 is fixedly mounted on the roller seat 5; the transmission seat 62 is provided with a guide groove 621 extending along a first direction, the first direction being inclined to the horizontal direction, and the guide groove 621 and the guide post 61 are slidably connected; the adjusting member 7 is threadedly connected to the transmission seat 62; when the adjusting member 7 rotates, under the guidance of the guide groove 621 and the guide post 61, the adjusting member 7 drives the transmission seat 62 to move along the first direction, and the adjusting member 7 can fix the relative position of the sliding seat 1 and the transmission seat 62 in the vertical direction. Under the drive of the transmission seat 62, the sliding seat 1 moves up and down relative to the roller seat 5. Thus, on the one hand, the sliding connection between the guide post 61 and the guide groove 621 on the transmission seat 62 achieves precise guidance of the transmission seat 62 in the first direction. This design ensures the stability and accuracy of the transmission seat 62 during movement, reduces errors caused by shaking or offset, and has a relatively compact structure that occupies less space. On the other hand, the adjusting member 7 is rotatably connected to the sliding seat 1 and threadedly connected to the transmission seat 62. The adjusting member 7 can not only drive the transmission seat 62 to move in the first direction, but also fix the relative position of the sliding seat 1 and the transmission seat 62 in the vertical direction. Users can easily adjust the position of the transmission seat 62 by rotating the adjusting member 7. This design provides flexible adjustment capability, enabling the transmission mechanism 6 to adapt to different working requirements or environmental changes, thereby improving the stability and reliability of the entire transmission mechanism 6.

[0045] like Figure 4 and Figure 9 As shown, preferably, in this embodiment, the axis of the first pulley 2 is arranged in the vertical direction; the diameter of the first pulley 2 is larger than the width of the roller 51 in the horizontal direction. In this way, interference between the roller 51 and the belt 10 wound on the first pulley 2 can be avoided, the potential interference between the two can be reduced, and the smoothness of belt 10 transmission and the stability of roller 51 sliding can be ensured.

[0046] Specifically, in this embodiment, the first direction can be referenced. Figure 2 In the e1 direction.

[0047] It should be noted that in some other embodiments, the transmission mechanism 6 may also be, but is not limited to, a gear transmission mechanism 6 or a cam transmission mechanism 6, etc., and can be selected according to actual needs. There is no unique limitation here.

[0048] like Figure 1 , Figure 2 and Figure 4 As shown, preferably, in this embodiment, the sliding seat 1 is provided with a limiting groove 12 extending in the vertical direction. The limiting groove 12 and the guide post 61 are slidably connected to provide guidance for the up-and-down movement of the sliding seat 1 relative to the roller seat 5. Thus, on the one hand, the sliding connection between the limiting groove 12 and the guide post 61 ensures the stability and accuracy of the sliding seat 1 during up-and-down movement, effectively preventing the sliding seat 1 from deviating or shaking during movement. On the other hand, the sliding connection between the limiting groove 12 and the guide post 61 helps reduce friction and wear, thereby extending the service life of the transmission mechanism 6. Under stress, the limiting groove 12 can effectively disperse stress, preventing the sliding seat 1 from deforming or being damaged due to excessive force.

[0049] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, preferably, in this embodiment, the first end of the sliding seat 1 is provided with a connecting seat 8, the first pulley 2 is installed on the connecting seat 8, the connecting seat 8 is provided with a clearance hole 83, the clearance hole 83 is arranged opposite to the adjusting member 7 so that the operating tool can pass through the clearance hole 83, thereby facilitating the connection between the operating tool and the adjusting member 7 to rotate the adjusting member 7. Thus, on the one hand, the connecting seat 8 is cleverly set at the first end of the sliding seat 1. This design not only provides a stable mounting base for the first pulley 2, but also ensures the stability and reliability of the first pulley 2 during rotation. On the other hand, the first pulley 2 is precisely mounted on the connecting seat 8. This layout enables the pulley assembly to transmit power efficiently and meet the needs of various application scenarios. Furthermore, the connecting seat 8 is provided with an avoidance hole 83. This hole is set opposite to the adjusting component 7, cleverly avoiding the interference area of ​​the adjusting component 7. Through the avoidance hole 83, the operating tool can be directly connected to the adjusting component 7 without complicated auxiliary tools or additional operating steps. Once the operating tool is connected to the adjusting component 7, the user can easily rotate the adjusting component 7 to achieve precise control of the up and down movement of the sliding seat 1.

[0050] like Figure 2 As shown, preferably, in this embodiment, the connecting seat 8 is detachably connected to the first end of the sliding seat 1, and the second connecting block 11 is detachably connected to the second end of the sliding seat 1. Thus, both the connecting seat 8 and the second connecting block 11 are detachable, and the sliding seat 1 can be selected from conventional models, reducing the shape and size requirements of the sliding seat 1, thereby reducing the design cost.

[0051] like Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, this embodiment also provides a linkage door system, including the pulley assembly as described above, as well as a door / window sash 9, a belt 10, and a second pulley 20. The door / window sash 9 is provided with a horizontal frame 91, and the horizontal frame 91 is provided with a mounting groove 92. The sliding seat 1 and the fixed seat 3 are disposed in the mounting groove 92. The first pulley 2 is located at the first end of the horizontal frame 91, and the second pulley 20 is located at the second end of the horizontal frame 91. The belt 10 is wound around the first pulley 2 and the second pulley 20. In this way, a dedicated mounting groove 92 is provided on the horizontal frame 91 of the door / window sash 9, and the sliding seat 1 and the fixed seat 3 are cleverly placed in this groove. This layout not only ensures the stability and reliability of the pulley assembly, but also makes the whole system more compact and beautiful.

[0052] like Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, preferably, in this embodiment, the mounting groove 92 has a groove top wall 921 and a limiting wall 922, which are arranged opposite to each other. The fixing seat 3 has an abutment wall 32 located above the limiting wall 922. The fixing seat 3 is provided with a first fastener 33, which can abut against the groove top wall 921 to make the abutment wall 32 press down on the limiting wall 922. In this way, the mounting groove 92 is cleverly designed with a groove top wall 921 and a limiting wall 922, which are arranged opposite to each other to form a stable frame, providing a solid foundation for the installation of the fixing seat 3. Thus, during installation, the user only needs to place the fixing seat 3 into the mounting groove 92 and then adjust the position of the first fastener 33 so that it abuts against the top wall 921 of the groove. As the first fastener 33 is gradually tightened, the abutting wall 32 will press down the limiting wall 922, thereby ensuring the stability of the fixing seat 3 in the mounting groove 92. In addition, the introduction of the first fastener 33 also allows the user to fine-tune the position of the fixing seat 3 relative to the mounting groove 92 according to actual needs. This design not only improves the flexibility of installation, but also ensures the stability and reliability of the entire linkage door system.

[0053] like Figure 2 , Figure 4 , Figure 6 and Figure 7As shown, preferably, in this embodiment, the linkage door system further includes a second fastener 82. When the first pulley 2 is subjected to a force exerted by the elastic member 4 on the sliding seat 1 away from the fixed seat 3, causing the belt 10 to be taut, the second fastener 82 is used to fix the relative position of the first pulley 2 and the mounting groove 92. More specifically, the second fastener 82 is connected to the aforementioned connecting seat 8, and the second fastener 82 is used to fix the relative position of the connecting seat 8 and the mounting groove 92.

[0054] like Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, preferably, in this embodiment, the connecting seat 8 is provided with a positioning wall 81 opposite to the limiting wall 922. The second fastener 82 is connected to the connecting seat 8 in a direction inclined to the horizontal. When one end of the second fastener 82 abuts against the top wall 921 of the groove, the positioning wall 81 can press down on the limiting wall 922, thereby fixing the relative position of the connecting seat 8 and the mounting groove 92. Thus, the connecting seat 8 is provided with a positioning wall 81 opposite to the limiting wall 922. This design allows the second fastener 82 to more effectively fix the relative position of the connecting seat 8 and the mounting groove 92. When the second fastener 82 is connected to the connecting seat 8 in a direction inclined to the horizontal, one end of it abuts against the top wall 921 of the groove, which can press down on the limiting wall 922, thereby achieving a fixing effect. Furthermore, when it is necessary to adjust the tension of the elastic element 4, the user can easily loosen the second fastener 82 to release the relative position fixation between the connecting seat 8 and the mounting groove 92. This design not only improves the convenience of adjustment, but also ensures the stability and safety of the system during the adjustment process.

[0055] Specifically, such as Figure 9 As shown, the linkage door system includes multiple door panels, and adjacent door panels are connected by a linkage 30. The belt 10 is wound around the first pulley 2, the second pulley 20 and the linkage 30. The linkage 30 is used to drive the other door panel to move when one door panel moves.

[0056] Specifically, in this embodiment, both the first fastener 33 and the second fastener 82 are screws.

[0057] Specifically, in this embodiment, the elastic element 4 is a spring. It should be noted that in some other embodiments, the elastic element 4 may also be, but is not limited to, a disc spring or elastic rubber, etc., depending on the actual needs, and is not limited here.

[0058] In summary, the pulley assembly and the linkage door system including it disclosed in this utility model can bring at least the following beneficial technical effects:

[0059] 1) By integrating the first pulley 2 into the sliding seat 1, the number of parts is reduced, the installation steps are simplified, and the installation efficiency is improved. The overall design of the pulley assembly is more compact, occupies less space, and improves the aesthetics and space utilization of the door leaf.

[0060] 2) By utilizing the elastic element 4, the belt 10 can be automatically tightened through simple operation during installation without additional adjustment, which improves the convenience and accuracy of installation. The automatic adjustment of the belt 10 tension is thus achieved.

[0061] 3) The snap-fit ​​design of the elastic element 4 and the second connecting block 11 makes it easy to disassemble the sliding seat 1 and the elastic element 4 when maintenance and replacement are required, which reduces maintenance costs and improves the maintainability of the pulley assembly.

[0062] 4) The design of the second guide surface 112 enables the second end of the elastic element 4 to move along a clear path during installation. This not only simplifies the installation steps, but also ensures that the elastic element 4 can be accurately snapped into the second slot 111, thereby avoiding performance problems caused by improper installation.

[0063] 5) When it is necessary to disassemble or replace the elastic element 4, simply move the second end of the elastic element 4 in the opposite direction of the second guide surface 112 to easily remove it from the second slot 111. This design greatly simplifies the disassembly process and reduces maintenance costs.

[0064] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A pulley assembly for a linkage door system, characterized in that, include: A sliding seat (1) is provided with rollers (51); The first pulley (2) is connected to the first end of the sliding seat (1); A fixing seat (3) is used to fix the door leaf to the horizontal frame (91), and the second ends of the fixing seat (3) and the sliding seat (1) are arranged opposite to each other; An elastic element (4) is disposed between the fixed seat (3) and the sliding seat (1), and the elastic element (4) is configured to apply a force to the sliding seat (1) away from the fixed seat (3).

2. The pulley assembly according to claim 1, characterized in that, The first end of the elastic element (4) is connected to the fixed seat (3), and the second end of the sliding seat (1) is provided with a second connecting block (11); the second connecting block (11) has a second slot (111) and a second guide surface (112); the second end of the elastic element (4) can move along the second guide surface (112) until it is engaged in the second slot (111).

3. The pulley assembly according to claim 2, characterized in that, The cross-section of the second connecting block (11) in the direction perpendicular to the axis gradually decreases in the direction away from the second slot (111).

4. The pulley assembly according to claim 1, characterized in that, The axis of the first pulley (2) is set in the vertical direction; the diameter of the first pulley (2) is greater than the width of the roller (51) in the horizontal direction.

5. The pulley assembly according to claim 2 or 3, characterized in that, The pulley assembly also includes an adjusting member (7), a transmission mechanism (6), and a roller seat (5). The sliding seat (1) is movably connected to the roller seat (5) and the roller (51) is disposed on the roller seat (5). The transmission mechanism (6) is disposed between the sliding seat (1) and the roller seat (5). The adjusting member (7) is rotatably connected to the first end of the sliding seat (1) and the adjusting member (7) and the transmission mechanism (6) are connected in a transmission manner. When the adjusting member (7) rotates, the sliding seat (1) can move up and down relative to the roller seat (5) under the drive of the transmission mechanism (6).

6. The pulley assembly according to claim 5, characterized in that, The first end of the sliding seat (1) is provided with a connecting seat (8), the first pulley (2) is installed on the connecting seat (8), the connecting seat (8) is provided with a clearance hole (83), and the clearance hole (83) is disposed opposite to the adjusting member (7).

7. The pulley assembly according to claim 6, characterized in that, The connecting seat (8) is detachably connected to the first end of the sliding seat (1), and the second connecting block (11) is detachably connected to the second end of the sliding seat (1).

8. A linkage door system, characterized in that, The assembly includes the pulley assembly as described in any one of claims 1-7, and further includes a door / window sash (9), a belt (10), and a second pulley (20). The door / window sash (9) is provided with a horizontal frame (91), the horizontal frame (91) is provided with a mounting groove (92), the sliding seat (1) and the fixed seat (3) are disposed in the mounting groove (92), the first pulley (2) is located at the first end of the horizontal frame (91), the second pulley (20) is located at the second end of the horizontal frame (91), and the belt (10) is wound around the first pulley (2) and the second pulley (20).

9. The linkage door system according to claim 8, characterized in that, The mounting groove (92) has a groove top wall (921) and a limiting wall (922), the limiting wall (922) and the groove top wall (921) are arranged opposite to each other, the fixing seat (3) has an abutment wall (32) located above the limiting wall (922), the fixing seat (3) is provided with a first fastener (33), the first fastener (33) can abut against the groove top wall (921) so that the abutment wall (32) presses down the limiting wall (922).

10. The linkage door system according to claim 8, characterized in that, The linkage door system also includes a second fastener (82). When the first pulley (2) is subjected to a force exerted by the elastic element (4) on the sliding seat (1) away from the fixed seat (3) to tighten the belt (10), the second fastener (82) is used to fix the relative position of the first pulley (2) and the mounting groove (92).

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