Pulley mechanism and door system comprising same

Abstract

The utility model discloses a pulley mechanism and a door system comprising the same. The pulley mechanism comprises a pulley seat; the connecting seat is vertically and movably connected to the pulley seat; the connecting frame comprises a transverse plate and a vertical plate, the transverse plate is fixedly connected to the connecting base, the vertical plate is fixedly connected to the transverse plate, and the side, away from the transverse plate, of the vertical plate is used for being connected with the door body; the transmission mechanism is arranged between the connecting seat and the pulley seat; the axis of the adjusting piece extends in the horizontal direction, the adjusting piece is rotationally connected to the side end of the connecting base and is in transmission connection with the transmission mechanism, and when the adjusting piece rotates, the connecting base can move up and down relative to the pulley base under the driving of the transmission mechanism. When the height of the door body needs to be adjusted, an operator can rotate the adjusting part at the side end part, so that the operator does not need to strenuously rotate the adjusting screw in the vertical direction in a narrow space, and particularly, the operator can more easily and quickly adjust the height of the door body in furniture environments such as a wardrobe with limited space.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window hardware accessories, in particular to a pulley mechanism and a door system comprising the pulley mechanism. Background Art

[0002] The cabinet door system usually includes a pulley mechanism, a slide rail, a cabinet body and a door body. The pulley mechanism includes a pulley seat, a connecting piece and an adjusting screw. The slide rail is fixed to the cabinet body, the pulley seat is slidably set on the slide rail, the connecting piece is movably connected to the pulley seat up and down, the door body is fixed on the connecting piece, and the axis of the adjusting screw extends in the vertical direction. The adjusting screw is rotatably connected to the connecting piece and is threadedly connected to the pulley seat. By rotating the adjusting screw, the connecting piece can be driven to slide up and down relative to the pulley seat, thereby achieving the purpose of adjusting the door body height. However, due to the small distance between the adjusting screw and the top wall of the cabinet body, the adjusting screw position is not easy to reach during actual operation, and users often feel inconvenience when adjusting the height. Especially in wardrobe doors, this problem is more obvious. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the present invention provides a pulley mechanism and a door system including the pulley mechanism, aiming to improve the convenience of adjusting the height of the door body.

[0004] The technical solution adopted by the present invention to solve the problem is:

[0005] A pulley mechanism comprises: a pulley seat; a connecting seat, movably connected to the pulley seat up and down, and the connecting seat is used to connect a door body; a connecting frame, comprising a horizontal plate and a vertical plate, the horizontal plate is fixed to the connecting seat, the vertical plate is fixed to the horizontal plate, and the side of the vertical plate away from the horizontal plate is used to connect the door body; a transmission mechanism, arranged between the connecting seat and the pulley seat; an adjusting member, the axis of which extends in the horizontal direction, the adjusting member is rotatably connected to the side end of the connecting seat and is transmission-connected to the transmission mechanism, and when the adjusting member rotates, the connecting seat can move up and down relative to the pulley seat under the drive of the transmission mechanism.

[0006] According to some embodiments of the present utility model, the transmission mechanism includes a guide column and a transmission seat; the guide column is fixed to the pulley seat; the transmission seat is provided with a guide groove extending along a first direction, the first direction is inclined to the horizontal direction, and the guide groove and the guide column are slidingly connected; the adjusting member is threadedly connected to the transmission seat; when the adjusting member rotates, under the guidance of the guide groove and the guide column, the adjusting member drives the transmission seat to move along the first direction, and the adjusting member can fix the relative positions of the connecting seat and the transmission seat in the vertical direction, and under the drive of the transmission seat, the connecting seat moves up and down relative to the pulley seat.

[0007] According to some embodiments of the present invention, the connecting seat is provided with a limiting groove extending in a vertical direction, and the limiting groove is slidably connected to the guide column.

[0008] According to some embodiments of the present invention, the pulley mechanism further includes a limiting plate, which is arranged at the side end portion of the connecting seat, and the limiting plate is provided with a limiting groove, which is connected to the outer peripheral side of the adjusting member to limit the axial movement of the adjusting member.

[0009] According to some embodiments of the present invention, the connecting seat is provided with an accommodating cavity, the pulley seat and the transmission seat are arranged in the accommodating cavity, and the cavity wall of the accommodating cavity is against the opposite side walls of the pulley seat and is in sliding contact with the opposite side walls of the pulley seat.

[0010] According to some embodiments of the present invention, the transmission seat is provided with a clearance opening, the pulley seat is rotatably provided with a roller, the roller is used to roll on the track, and the roller is located in the clearance opening.

[0011] According to some embodiments of the present invention, the pulley mechanism also includes a limit hook, which is rotatably connected to the pulley seat, and the limit hook can rotate between a first position and a second position; when the limit hook is rotated to the first position, the limit hook is used to engage with the track to limit the up and down movement of the pulley seat; when the limit hook is rotated to the second position, the limit hook releases the movement restriction on the pulley seat.

[0012] According to some embodiments of the present invention, the pulley seat is provided with a first card slot and a second card slot, and the limit hook is provided with a card block; when the limit hook rotates to the first position, the card block is engaged in the first card slot to keep the limit hook in the first position; when the limit hook rotates to the second position, the card block is engaged in the second card slot to keep the limit hook in the second position.

[0013] According to some embodiments of the present invention, an opening is further provided at the side end portion of the connecting seat, and the limiting hook is provided with an operating position for cooperating with an operating tool, and the operating position is arranged opposite to the opening.

[0014] In addition, the present invention also provides a door system, including the pulley mechanism as described above, and also including a track and a door body, the pulley seat is slidably arranged on the track, and the door body is fixed to the connecting seat.

[0015] In summary, the pulley mechanism and the door system including the pulley mechanism provided by the present invention have at least the following technical effects:

[0016] The adjusting part is arranged horizontally and is rotatably connected to the side end of the connecting seat. When the height of the door body needs to be adjusted, the operator can rotate the adjusting part at the side end, so that the operator does not need to laboriously turn the vertical adjusting screw in a small space. In this way, the convenience of the adjustment operation is significantly improved, especially in furniture environments such as wardrobes with limited space. The operator can complete the adjustment of the door body height more easily and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a door system (door body not shown) according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of a pulley mechanism according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the exploded structure of the pulley mechanism of an embodiment of the utility model from a first perspective;

[0020] Figure 4 This is a schematic diagram of the exploded structure of the pulley mechanism according to an embodiment of the utility model at a second viewing angle;

[0021] Figure 5 for Figure 4 A partial enlarged view of part A in the middle;

[0022] Figure 6 This is a schematic diagram of the exploded structure of the pulley mechanism of an embodiment of the utility model from a third perspective.

[0023] The meanings of the reference numerals are as follows:

[0024] 1. Pulley seat; 11. Roller; 12. First rotating shaft; 13. First clamping slot; 14. Second clamping slot; 2. Connecting seat; 21. Limiting slot; 22. Accommodating chamber; 23. Opening; 3. Transmission mechanism; 31. Guide column; 32. Transmission seat; 321. Guide slot; 322. Yield opening; 323. Transmission protrusion; 3231. Transmission threaded hole; 4. Adjusting member; 5. Connecting frame; 51. Horizontal plate; 52. Vertical plate; 6. Limiting plate; 61. Limiting slot; 7. Limiting hook; 71. Block; 72. Operating position; 73. Second rotating shaft; 8. Track; 81. Groove. DETAILED DESCRIPTION

[0025] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] See also Figures 1 to 4 , this embodiment discloses a pulley mechanism, including a pulley seat 1, a connecting seat 2, a transmission mechanism 3, an adjusting member 4 and a connecting frame 5; the connecting seat 2 is movably connected to the pulley seat 1 up and down; the connecting frame 5 includes a horizontal plate 51 and a vertical plate 52, the horizontal plate 51 is fixed to the connecting seat 2, and the vertical plate 52 is fixed to the horizontal plate 51, and the side of the vertical plate 52 away from the horizontal plate 51 is used to connect the door body; the transmission mechanism 3 is arranged between the connecting seat 2 and the pulley seat 1; the axis of the adjusting member 4 extends in the horizontal direction, and the adjusting member 4 is rotatably connected to the side end of the connecting seat 2 and is transmission-connected with the transmission mechanism 3. When the adjusting member 4 rotates, driven by the transmission mechanism 3, the connecting seat 2 can move up and down relative to the pulley seat 1, thereby driving the horizontal plate 51 and the vertical plate 52 to move up and down, thereby realizing the height adjustment of the door body.

[0030] Specifically, in this embodiment, the pulley mechanism can be applied to a cabinet door system, and in particular, the pulley mechanism can be applied to a wardrobe door system.

[0031] A pulley mechanism is provided in this embodiment, in which the adjusting member 4 is arranged horizontally and rotatably connected to the side end of the connecting seat 2. When the height of the door body needs to be adjusted, the operator can rotate the adjusting member 4 at the side end, so that the operator does not need to laboriously turn the vertical adjusting screw in a small space. In this way, the convenience of the adjustment operation is significantly improved, especially in a furniture environment such as a wardrobe with limited space, the operator can complete the adjustment of the door body height more easily and quickly.

[0032] like Figure 2 、 Figure 3 and Figure 4As shown, preferably, in this embodiment, the transmission mechanism 3 includes a guide column 31 and a transmission seat 32; the guide column 31 is fixed to the pulley seat 1; the transmission seat 32 is provided with a guide groove 321 extending along a first direction, the first direction is inclined to the horizontal direction, and the guide groove 321 and the guide column 31 are slidingly connected; the adjusting member 4 is threadedly connected to the transmission seat 32; when the adjusting member 4 rotates, under the guidance of the guide groove 321 and the guide column 31, the adjusting member 4 drives the transmission seat 32 to move along the first direction, and the adjusting member 4 can fix the relative position of the connecting seat 2 and the transmission seat 32 in the vertical direction. Driven by the transmission seat 32, the connecting seat 2 moves up and down relative to the pulley seat 1. In this way, on the one hand, through the sliding connection between the guide column 31 and the guide groove 321 on the transmission base 32, precise guidance of the transmission base 32 in the first direction is achieved. This design ensures the stability and accuracy of the transmission base 32 during movement, reduces errors caused by shaking or offset, and has a relatively compact structure and occupies less space; on the other hand, the adjusting member 4 is rotatably connected to the connecting base 2 and threadedly connected to the transmission base 32. The adjusting member 4 can not only drive the transmission base 32 to move along the first direction, but also fix the relative position of the connecting base 2 and the transmission base 32 in the vertical direction. The user can conveniently adjust the position of the transmission base 32 by rotating the adjusting member 4. This design provides flexible adjustment capabilities, so that the transmission mechanism 3 can adapt to different working requirements or environmental changes, thereby improving the stability and reliability of the entire transmission mechanism 3.

[0033] Specifically, in this embodiment, the first direction can refer to Figure 3 The e1 direction in .

[0034] It should be noted that, in some other embodiments, the transmission mechanism 3 may also be, but is not limited to, a gear transmission mechanism or a cam transmission mechanism, etc., which can be selected according to actual needs and is not limited here.

[0035] like Figure 2 、 Figure 3 and Figure 4 As shown, preferably, in this embodiment, the connecting base 2 is provided with a limiting groove 21 extending in the vertical direction, and the limiting groove 21 and the guide post 31 are slidably connected to provide guidance for the up and down movement of the connecting base 2 relative to the pulley base 1. In this way, on the one hand, the sliding connection between the limiting groove 21 and the guide post 31 ensures the stability and accuracy of the connecting base 2 during the up and down movement, and effectively prevents the connecting base 2 from deflecting or shaking during the movement. On the other hand, the sliding connection between the limiting groove 21 and the guide post 31 helps to reduce friction and wear, thereby extending the service life of the transmission mechanism 3. When subjected to stress, the limiting groove 21 can effectively disperse the stress and prevent the connecting base 2 from being deformed or damaged due to excessive stress.

[0036] like Figure 3 、 Figure 4and Figure 6 As shown, preferably, in this embodiment, the pulley mechanism further includes a limiting plate 6, which is disposed at the side end of the connecting seat 2. The limiting plate 6 is provided with a limiting groove 21, which is connected to the outer peripheral side of the adjusting member 4 to limit the axial movement of the adjusting member 4. In this way, the limiting plate 6 and the limiting groove 21 thereon provide additional support and guidance for the adjusting member 4, helping to maintain the stability of the adjusting member 4 during the adjustment process, preventing it from deflecting or shaking due to uneven force, and ensuring the stability of the adjusting member 4 in the axial direction. This avoids unnecessary axial movement of the adjusting member 4 due to external force or long-term use, thereby maintaining the stability and reliability of the pulley mechanism.

[0037] like Figure 4 and Figure 6 As shown, preferably, in this embodiment, the connecting base 2 is provided with a accommodating cavity 22, the pulley base 1 and the transmission base 32 are arranged in the accommodating cavity 22, and the cavity wall of the accommodating cavity 22 is arranged against the opposite side walls of the pulley base 1 and is in sliding contact with the opposite side walls of the pulley base 1. In this way, the design of the accommodating cavity 22 enables the pulley base 1 and the transmission base 32 to be tightly installed together, reducing the additional installation space and the number of components, and improving the compactness of the structure. In addition, the sliding contact between the cavity wall of the accommodating cavity 22 and the opposite side walls of the pulley base 1 ensures the stability of the connecting base 2 when it moves up and down relative to the pulley base 1, reduces the friction and resistance during the movement, and enables the connecting base 2 to move more smoothly. At the same time, the sliding contact also reduces the noise generated by friction, thereby improving the quiet performance of the system.

[0038] Preferably, in this embodiment, the opposite side walls of the transmission base 32 abut against and are in sliding contact with the walls of the accommodating chamber 22. Thus, the sliding contact between the opposite side walls of the transmission base 32 and the walls of the accommodating chamber 22 ensures the stability of the transmission base 32 during movement and reduces frictional resistance between the transmission base 32 and the walls of the accommodating chamber 22. This design reduces shaking and deviation of the transmission base 32 when subjected to force, thereby making the movement of the transmission base 32 more stable and smooth.

[0039] like Figure 3 、 Figure 4 and Figure 6As shown, preferably, in this embodiment, the transmission seat 32 is provided with a clearance opening 322, and the pulley seat 1 is rotatably provided with a roller 11, which is used to roll on the track 8, and the roller 11 is located in the clearance opening 322. In this way, on the one hand, the rolling of the roller 11 on the track 8 ensures that the pulley seat 1 can move smoothly along the track 8. This design reduces the friction resistance between the pulley seat 1 and the track 8, and the pulley seat 1 moves more easily and quickly; on the other hand, the design of the clearance opening 322 helps to optimize the structural compactness of the transmission mechanism 3. By reasonably setting the size and shape of the clearance opening 322, it can be ensured that the roller 11 will not interfere with the transmission seat 32 or other components during movement, thereby avoiding the need for additional installation space or support components. This compact structural design not only reduces the overall cost, but also improves the reliability of the system. Specifically, in this embodiment, the roller 11 is rotatably connected to the pulley seat 1 via the first rotating shaft 12, and the axis of the first rotating shaft 12 is set in the horizontal direction.

[0040] like Figure 3 、 Figure 4 and Figure 6 As shown, preferably, in this embodiment, a transmission protrusion 323 is fixedly provided on the transmission base 32, and the transmission protrusion 323 is provided with a transmission threaded hole 3231. The adjustment member 4 is threadedly connected to the transmission threaded hole 3231. In this way, not only a stable connection between the adjustment member 4 and the transmission base 32 is ensured, but also the adjustment process can be made more accurate and reliable.

[0041] like Figure 1 As shown, further, in this embodiment, the pulley mechanism further includes a limit hook 7, which is rotatably connected to the pulley seat 1 and can rotate between a first position and a second position; when the limit hook 7 rotates to the first position, the limit hook 7 is used to engage with the track 8 to limit the up and down movement of the pulley seat 1; when the limit hook 7 rotates to the second position, the limit hook 7 releases the movement restriction on the pulley seat 1. Figure 1 As shown, when the limit hook 7 is rotated to the first position, its shape and position are designed to be able to engage with a specific part (such as a groove 81, a flange, etc.) on the track 8. This engaging relationship effectively limits the vertical jump of the pulley seat 1, thereby improving the stability and accuracy of the pulley mechanism during movement; when the limit hook 7 is rotated to the second position, it is no longer engaged with the track 8, thereby releasing the restriction on the movement of the pulley seat 1, which allows the pulley seat 1 to move freely on the track 8 without being hindered by the limit hook 7. This state is usually used in scenarios where the pulley mechanism needs to be adjusted in position. Specifically, in this embodiment, the limit hook 7 is rotatably connected to the pulley seat 1 via the second rotating shaft 73.

[0042] like Figure 4 、 Figure 5 and Figure 6As shown, preferably, in this embodiment, the pulley seat 1 is provided with a first engaging groove 13 and a second engaging groove 14, and the limiting hook 7 is provided with a clamping block 71; when the limiting hook 7 rotates to the first position, the clamping block 71 is engaged in the first engaging groove 13 to maintain the limiting hook 7 in the first position; when the limiting hook 7 rotates to the second position, the clamping block 71 is engaged in the second engaging groove 14 to maintain the limiting hook 7 in the second position. In this way, when the limiting hook 7 rotates to the first position, the clamping block 71 thereon will naturally fall into the first engaging groove 13 on the pulley seat 1. This clamping relationship ensures that the limiting hook 7 can be firmly maintained in the first position when it is necessary to limit the pulley seat 1 from jumping up and down, and is not easily loosened or shifted due to external factors; similarly, when the limiting hook 7 rotates to the second position, the clamping block 71 will be engaged in the second engaging groove 14. This design allows the limiting hook 7 to remain stable even when the limit on the movement of the pulley seat 1 is released, avoiding unnecessary shaking or interference.

[0043] Such as 4 and Figure 5 As shown, preferably, in this embodiment, the side end of the connecting base 2 is further provided with an opening 23, and the limiting hook 7 is provided with an operating position 72 for cooperating with an operating tool, and the operating position 72 is arranged opposite the opening 23. Thus, on the one hand, the operating position 72 on the limiting hook 7 is designed to match the shape and size of the head of an operating tool (such as a wrench, screwdriver, etc.). This design allows the user to easily rotate or push the limiting hook 7 using a standard operating tool without the need for special tools or equipment. On the other hand, by arranging the operating position 72 opposite the opening 23, the user can conveniently control the rotation of the limiting hook 7 using the operating tool. This design not only simplifies the operation process but also improves the efficiency and accuracy of the operation. At the same time, the opening 23 also provides sufficient space for the operating tool to rotate or push.

[0044] like Figures 1 to 6 As shown, in addition, this embodiment also provides a door system, including the pulley mechanism as described above, and also including a track 8 and a door body, the pulley seat 1 is slidably set on the track 8, and the door body is fixed to the connecting seat 2. The door system has all the advantages of the above-mentioned pulley mechanism and will not be repeated here.

[0045] Preferably, in this embodiment, a groove 81 extending along the length is provided on the lower side of the track 8 , and when the limiting hook 7 rotates to the first position, the limiting hook 7 engages with the groove 81 to limit the up and down movement of the pulley seat 1 .

[0046] Specifically, in this embodiment, two tracks 8 are provided, and two door bodies, pulley mechanisms and connecting frames 5 are correspondingly provided. The two pulley mechanisms are provided on the two tracks 8 in a one-to-one correspondence, the two connecting frames 5 are connected to the two connecting seats 2 in a one-to-one correspondence, and the two door bodies are fixed on the two connecting frames 5 in a one-to-one correspondence. Preferably, the horizontal plate 51 and the vertical plate 52 are connected in an L-shape to avoid interference between the two door bodies.

[0047] In summary, the pulley mechanism disclosed in the present invention and the door system including the pulley mechanism can at least bring the following beneficial technical effects:

[0048] 1) When the door height needs to be adjusted, the operator can rotate the adjustment member 4 at the side end, eliminating the need for the operator to laboriously rotate the vertical adjustment screw in a narrow space. This significantly improves the convenience of the adjustment operation, especially in a furniture environment such as a wardrobe with limited space, allowing the operator to adjust the door height more easily and quickly;

[0049] 2) The sliding connection between the guide post 31 and the guide groove 321 on the transmission base 32 enables precise guidance of the transmission base 32 in the first direction. This design ensures the stability and accuracy of the transmission base 32 during movement, reduces errors caused by shaking or offset, and has a relatively compact structure, occupying less space.

[0050] 3) The adjustment member 4 not only drives the transmission base 32 to move in the first direction, but also fixes the relative position of the connecting base 2 and the transmission base 32 in the vertical direction. The user can conveniently adjust the position of the transmission base 32 by rotating the adjustment member 4. This design provides flexible adjustment capabilities, allowing the transmission mechanism 3 to adapt to different working requirements or environmental changes, thereby improving the stability and reliability of the entire transmission mechanism 3;

[0051] 4) The sliding connection between the limiting groove 21 and the guide column 31 ensures the stability and accuracy of the connecting base 2 during the up and down movement, and effectively prevents the connecting base 2 from deflecting or shaking during the movement.

[0052] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A pulley mechanism, characterized in that: include: Pulley seat (1); A connecting seat (2) movably connected to the pulley seat (1) in an up-and-down manner; A connecting frame (5) comprises a transverse plate (51) and a vertical plate (52), wherein the transverse plate (51) is fixedly connected to the connecting seat (2), and the vertical plate (52) is fixedly connected to the transverse plate (51), and a side of the vertical plate (52) away from the transverse plate (51) is used for connecting to the door body; A transmission mechanism (3) is arranged between the connecting seat (2) and the pulley seat (1); The adjusting member (4) has an axis extending in the horizontal direction. The adjusting member (4) is rotatably connected to the side end of the connecting seat (2) and is transmission-connected to the transmission mechanism (3). When the adjusting member (4) rotates, the connecting seat (2) can move up and down relative to the pulley seat (1) under the drive of the transmission mechanism (3).

2. The pulley mechanism according to claim 1, wherein: The transmission mechanism (3) comprises a guide column (31) and a transmission seat (32); the guide column (31) is fixed to the pulley seat (1); the transmission seat (32) is provided with a guide groove (321) extending along a first direction, the first direction being inclined to a horizontal direction, and the guide groove (321) and the guide column (31) are slidably connected; The adjusting member (4) is threadedly connected to the transmission seat (32); when the adjusting member (4) rotates, under the guidance of the guide groove (321) and the guide column (31), the adjusting member (4) drives the transmission seat (32) to move along the first direction, and the adjusting member (4) can fix the relative positions of the connecting seat (2) and the transmission seat (32) in the vertical direction. Driven by the transmission seat (32), the connecting seat (2) moves up and down relative to the pulley seat (1).

3. The pulley mechanism according to claim 2, wherein: The connecting seat (2) is provided with a limiting groove (21) extending in a vertical direction, and the limiting groove (21) and the guide column (31) are slidably connected.

4. The pulley mechanism according to claim 2, wherein: The pulley mechanism further comprises a limiting plate (6), the limiting plate (6) being arranged at the side end portion of the connecting seat (2), the limiting plate (6) being provided with a limiting groove (21), the limiting groove (21) being connected to the outer peripheral side of the adjusting member (4) to limit the axial movement of the adjusting member (4).

5. The pulley mechanism according to claim 2, wherein: The connecting seat (2) is provided with an accommodating cavity (22), the pulley seat (1) and the transmission seat (32) are arranged in the accommodating cavity (22), and the cavity wall of the accommodating cavity (22) is arranged against the opposite side walls of the pulley seat (1) and is in sliding contact with the opposite side walls of the pulley seat (1).

6. The pulley mechanism according to claim 5, characterized in that: The transmission seat (32) is provided with a clearance opening (322), and the pulley seat (1) is rotatably provided with a roller (11), the roller (11) is used for rolling on the track (8), and the roller (11) is located in the clearance opening (322).

7. The pulley mechanism according to any one of claims 1 to 6, characterized in that: The pulley mechanism further comprises a limit hook (7), wherein the limit hook (7) is rotatably connected to the pulley seat (1), and the limit hook (7) can rotate between a first position and a second position; when the limit hook (7) is rotated to the first position, the limit hook (7) is used to engage with the track (8) to limit the up and down movement of the pulley seat (1); when the limit hook (7) is rotated to the second position, the limit hook (7) releases the movement restriction on the pulley seat (1).

8. The pulley mechanism according to claim 7, characterized in that: The pulley seat (1) is provided with a first clamping groove (13) and a second clamping groove (14), and the limiting hook (7) is provided with a clamping block (71); when the limiting hook (7) rotates to the first position, the clamping block (71) is clamped in the first clamping groove (13) to keep the limiting hook (7) in the first position; when the limiting hook (7) rotates to the second position, the clamping block (71) is clamped in the second clamping groove (14) to keep the limiting hook (7) in the second position.

9. The pulley mechanism according to claim 7, characterized in that: The side end portion of the connecting seat (2) is also provided with an opening (23), and the limiting hook (7) is provided with an operating position (72) for cooperating with an operating tool, and the operating position (72) is arranged opposite to the opening (23).

10. Door system, characterized in that, It comprises the pulley mechanism according to any one of claims 1 to 9, and further comprises a track (8) and a door body, wherein the pulley seat (1) is slidably arranged on the track (8), and the door body is fixed to the connecting seat (2).

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