Pulley mechanism and furniture hidden door comprising same

Abstract

The utility model discloses a pulley mechanism and furniture hidden door including it. Pulley mechanism includes: mounting seat, wheel subassembly sets up in mounting seat, and wheel subassembly is used for along horizontal direction slidingly arranged in track, connecting seat is used for connecting the hinge of door body, and connecting seat is connected in mounting seat, first adjusting structure sets up between connecting seat and mounting seat, and the position of connecting seat relative to mounting seat in first direction can be adjusted to drive first adjusting structure, and first direction is parallel with the sliding direction of wheel subassembly, second adjusting structure sets up between connecting seat and mounting seat, and the position of connecting seat relative to mounting seat in second direction can be adjusted to drive second adjusting structure, and second direction is parallel with horizontal and perpendicular with first direction. Thus, the installer can drive first adjusting structure and second adjusting structure, and the position of connecting seat relative to mounting seat is adjusted flexibly, thereby makes pulley mechanism in the best installation position quickly and accurately, and the assembly difficulty is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of door and window hardware accessories, specifically relating to pulley mechanisms and furniture hidden doors including them. Background Technology

[0002] Concealed doors in furniture, as described in related technologies, typically include a door body, hinges, a track, and a pulley mechanism. The track is installed on the cabinet or wall, and the pulley mechanism is installed on the track. The door body is rotatably connected to the pulley mechanism via hinges. Guided by the hinges, the door body can rotate relative to the cabinet or wall between the open and closed positions. When the door body is in the open position, it can slide to one side of the cabinet or wall under the guidance of the pulley mechanism to achieve concealment.

[0003] However, the assembly of hidden doors in furniture is relatively complex. The pulley mechanism needs to be connected to both the track and the hinges. Due to production deviations and assembly errors, the pulley mechanism may not be in the optimal installation position when installed on the cabinet or wall. If the pulley mechanism is too close to the cabinet or wall, the door in the open position cannot slide to one side of the cabinet or wall under the guidance of the pulley mechanism. If the pulley mechanism is too far away from the cabinet or wall, even if the door in the open position slides to one side of the cabinet or wall under the guidance of the pulley mechanism, it will still occupy a lot of indoor space. In addition, when the door is in the open position, if the pulley mechanism is too far out in its sliding direction, the part of the door that protrudes from the cabinet or wall after sliding to one side will be too large, affecting the overall aesthetics of the hidden door. Utility Model Content

[0004] In order to overcome at least one of the defects described in the prior art, the present invention provides a pulley mechanism and a furniture hidden door including the pulley mechanism, aiming to solve the problems of poor door sliding, large space occupation, and poor aesthetics caused by the difficulty in accurately controlling the installation position of the pulley mechanism of the furniture hidden door.

[0005] The technical solution adopted by this utility model to solve its problem is: A pulley mechanism for a concealed door in furniture includes: a mounting base; a wheel assembly disposed on the mounting base, the wheel assembly being slidably mounted on a track in a horizontal direction; a connecting base for connecting a hinge to a door body, the connecting base being connected to the mounting base; a first adjustment structure disposed between the connecting base and the mounting base, driving the first adjustment structure to adjust the position of the connecting base relative to the mounting base in a first direction, the first direction being parallel to the sliding direction of the wheel assembly; and a second adjustment structure disposed between the connecting base and the mounting base, driving the second adjustment structure to adjust the position of the connecting base relative to the mounting base in a second direction, the second direction being parallel to the horizontal direction and perpendicular to the first direction.

[0006] As an optional implementation, the mounting base is provided with a first slide groove extending along the first direction, and the second adjustment structure includes an adjustment rod disposed along the second direction, the adjustment rod being threadedly connected to the connecting base and rotatably connected to the first slide groove.

[0007] As an optional implementation, the adjusting rod is provided with a connecting ring groove on its periphery, and a limiting groove wall is provided in the first sliding groove, wherein the connecting ring groove and the limiting groove wall are engaged.

[0008] As an optional implementation, the mounting base is provided with a second sliding groove extending along the first direction, the first sliding groove and the second sliding groove are spaced apart, the connecting base is provided with a guide post, and the guide post is slidably disposed in the second sliding groove.

[0009] As an optional implementation, the first adjustment structure includes a rotating member rotatably connected to the connecting seat, which can drive the connecting seat to move along the first direction when it rotates.

[0010] As an optional implementation, the rotating component is provided with a cochlear-shaped protrusion, and the mounting base is provided with two abutting protrusions, with the protrusions being drivenly connected between the two abutting protrusions.

[0011] As an optional implementation, the wheel assembly includes a wheel body and a wheel seat, the wheel body is disposed on the wheel seat, the mounting seat is connected to the wheel seat, and a third adjustment structure is provided between the mounting seat and the wheel seat, the third adjustment structure being used to adjust the position of the mounting seat relative to the wheel seat in the vertical direction.

[0012] As an optional implementation, the third adjustment structure includes a fastener, a fastening hole disposed on the mounting base, and a connecting groove disposed on the wheel seat. The connecting groove is disposed in a vertical direction, and the fastener is detachably connected to the fastening hole and the connecting groove.

[0013] As an optional implementation, one of the mounting base and the wheel seat is provided with a rotating hole, and the other of the two is provided with a rotating column, and the rotating column and the rotating hole are rotatably connected.

[0014] In addition, this utility model also includes a furniture hidden door, including the pulley mechanism as described in any of the above embodiments, and also includes a track, a door body and a hinge. The wheel assembly is slidably disposed on the track in the horizontal direction, and the door body is rotatably connected to the connecting seat through the hinge.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: Firstly, by setting up a first adjustment structure and a second adjustment structure, even with production deviations and assembly errors during installation, it is not necessary to precisely determine the optimal position of the pulley mechanism during initial installation. Installers can first complete the approximate installation, and then flexibly adjust the position of the connecting seat relative to the mounting seat by driving the first and second adjustment structures. This allows the pulley mechanism to be quickly and accurately positioned at the optimal installation location, greatly reducing assembly difficulty and effectively improving assembly efficiency. Secondly, by using the first adjustment structure to adjust the position of the connecting seat in the first direction, reasonable adjustments can allow the door to slide deeper into the cabinet or wall, reducing the protruding part of the door and making the overall appearance of the hidden door cleaner and more aesthetically pleasing, thus improving the overall quality and visual effect of the furniture. By using the second adjustment structure to adjust the position of the connecting seat in the second direction, the position of the door perpendicular to the sliding direction can be precisely adjusted. Reasonable adjustments can precisely control the distance between the door and the cabinet or wall in the sliding direction, ensuring that when the door is in the open position, it can smoothly slide to the cabinet or wall under the guidance of the pulley mechanism, avoiding problems such as obstructed sliding or excessive space occupation caused by improper distance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the pulley mechanism according to an embodiment of this application; Figure 2 This is an exploded structural diagram of the pulley mechanism according to an embodiment of this application; Figure 3 This is a schematic diagram of the assembly structure of the mounting base and the connecting base according to an embodiment of this application; Figure 4This is a cross-sectional structural diagram of the mounting base and connecting base during assembly according to an embodiment of this application; Figure 5 This is a schematic diagram of the rotating component according to an embodiment of this application; Figure 6 This is a three-dimensional structural diagram of a furniture hidden door according to an embodiment of this application.

[0018] Explanation of key figure labels: 1. Mounting base; 11. First slide groove; 111. Limiting groove wall; 12. Second slide groove; 13. Abutment protrusion; 14. Fastening hole; 15. Rotation hole; 2. Wheel assembly; 21. Wheel body; 22. Wheel seat; 221. Connecting groove; 222. Rotating column; 3. Connecting base; 31. Guide column; 32. First adjusting hole; 33. Second adjusting hole; 4. First adjusting structure; 41. Rotating component; 411. Protruding rib; 412. First operating part; 5. Second adjusting structure; 51. Adjusting rod; 511. Connecting ring groove; 512. Second operating part; 6. Third adjusting structure; 61. Fastener; 7. Track; 8. Door body; 9. Hinge; 10. Cabinet body; 20. Connecting plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0023] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0024] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0025] Please see Figures 1 to 6 This application provides a pulley mechanism for a hidden door in furniture. The pulley mechanism includes a mounting base 1, a wheel assembly 2, a connecting base 3, a first adjustment structure 4, and a second adjustment structure 5. The wheel assembly 2 is disposed on the mounting base 1 and is slidably mounted on a track 7 in a horizontal direction. The connecting base 3 is used to connect the hinge 9 of the door body 8 and is connected to the mounting base 1. The first adjustment structure 4 is disposed between the connecting base 3 and the mounting base 1. Driving the first adjustment structure 4 can adjust the position of the connecting base 3 relative to the mounting base 1 in a first direction, which is parallel to the sliding direction of the wheel assembly 2. The second adjustment structure 5 is disposed between the connecting base 3 and the mounting base 1. Driving the second adjustment structure 5 can adjust the position of the connecting base 3 relative to the mounting base 1 in a second direction, which is parallel to the horizontal direction and perpendicular to the first direction.

[0026] The pulley mechanism disclosed in this application, in a first aspect, by setting a first adjustment structure 4 and a second adjustment structure 5, even if there are production deviations and assembly errors during the installation process, it is not necessary to accurately determine the optimal position of the pulley mechanism at the initial installation; the installer can first complete the installation roughly, and then flexibly adjust the position of the connecting seat 3 relative to the mounting seat 1 by driving the first adjustment structure 4 and the second adjustment structure 5, thereby quickly and accurately placing the pulley mechanism in the optimal installation position, greatly reducing the assembly difficulty and effectively improving the assembly efficiency. Secondly, by adjusting the position of the connecting seat 3 in the first direction using the first adjustment structure 4, the door 8 can be slid deeper into the cabinet 10 or wall after sliding, reducing the protruding part of the door 8 and making the overall appearance of the hidden door of the furniture neater and more beautiful, thus improving the overall quality and visual effect of the furniture. By adjusting the position of the connecting seat 3 in the second direction using the second adjustment structure 5, the position of the door 8 perpendicular to the sliding direction can be precisely adjusted. By adjusting it properly, the distance between the door 8 and the cabinet 10 or wall in the sliding direction can be precisely controlled, ensuring that when the door 8 is in the open position, it can slide smoothly to the cabinet 10 or wall under the guidance of the pulley mechanism, avoiding problems such as obstructed sliding or excessive space occupation caused by improper distance.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment, the mounting base 1 is provided with a first slide groove 11 extending along a first direction, and the second adjustment structure 5 includes an adjustment rod 51 arranged along a second direction. The adjustment rod 51 is threaded to the connecting base 3 and rotatably connected to the first slide groove 11. Thus, when the adjustment rod 51 is rotated, the precision of the threaded transmission allows for precise linear movement of the connecting base 3 along the second direction with a small amount of rotation. This ensures that the door 8 maintains an appropriate distance from the cabinet 10 or wall during sliding, avoiding friction or excessive gaps. The first slide groove 11 extends along the first direction, providing the adjustment rod 51 with the means to rotate and move. The first groove 11 provides space and guides the movement of the adjusting rod 51. When the connecting seat 3 moves along the first direction, the first groove 11 guides the adjusting rod 51 to move smoothly, avoiding problems such as jamming or offset during the movement of the adjusting rod 51. At the same time, the adjusting rod 51 adjusts the connecting seat 3 in the second direction, enabling the structure to adapt to installation errors under different conditions. No matter how much deviation the connecting seat 3 has in the first or second direction during initial installation, it can be corrected through corresponding adjustment operations, greatly improving the flexibility and success rate of installation and reducing the requirements for the installation environment and the skills of the installers.

[0028] like Figure 1 , Figure 2 , Figure 3and Figure 4 As shown, in one embodiment, a connecting ring groove 511 is provided on the periphery of the adjusting rod 51, and a limiting groove wall 111 is provided in the first sliding groove 11. The connecting ring groove 511 and the limiting groove wall 111 are engaged. Thus, during the adjustment of the position of the connecting seat 3, when the adjusting rod 51 is rotated, due to the engagement between the connecting ring groove 511 and the limiting groove wall 111, the adjusting rod 51 will not axially move due to external axial force or the reaction force generated by the threaded transmission. This ensures the stability and accuracy of the adjustment process, avoids adjustment failure or inaccurate adjustment caused by axial movement of the adjusting rod 51, and allows the connecting seat 3 to move smoothly in the second direction as expected.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment, the end of the adjusting rod 51 away from the mounting base 1 is provided with a second operating part 512. The second operating part 512 is used to connect with an operating tool (such as a screwdriver or wrench). The connecting base 3 is provided with a second adjusting hole 33. The adjusting rod 51 is threadedly connected to the second adjusting hole 33, and the second operating part 512 is located in the second adjusting hole 33.

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment, the mounting base 1 is provided with a second slide groove 12 extending along a first direction. The first slide groove 11 and the second slide groove 12 are spaced apart. The connecting base 3 is provided with a guide post 31, which slides in the second slide groove 12, forming a double constraint in cooperation with the adjusting rod 51. During the adjustment of the connecting base 3, the adjusting rod 51 mainly controls the movement of the connecting base 3 in the second direction (perpendicular to the first direction), while the sliding of the guide post 31 in the second slide groove 12 restricts the offset of the connecting base 3 in the first direction and other possible directions. This double constraint mechanism makes the movement trajectory of the connecting base 3 more stable, avoiding structural shaking or offset caused by unidirectional adjustment, thereby improving the structural stability of the entire pulley mechanism.

[0031] It should be noted that in some other embodiments, the second adjustment structure 5 may also be, but is not limited to, a telescopic rod capable of telescopic extension in the second direction. It can be selected according to actual needs and is not limited here.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in one embodiment, the first adjustment structure 4 includes a rotating member 41, which is rotatably connected to the connecting seat 3. When the rotating member 41 rotates, it can drive the connecting seat 3 to move along a first direction. Thus, this design can achieve extremely precise displacement adjustment of the connecting seat 3 by utilizing the angle change of the rotating member 41. The user only needs to perform the simple action of rotating the rotating member 41 to adjust the position of the connecting seat 3 in the first direction, reducing the difficulty of operation.

[0033] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, the rotating component 41 is provided with a cochlear-shaped protrusion 411, and the mounting base 1 is provided with two abutting protrusions 13. The protrusion 411 is drivenly connected between the two abutting protrusions 13. Thus, when the rotating component 41 rotates, the protrusion 411 interacts with the two abutting protrusions 13. As the rotation angle changes, the contact point between the protrusion 411 and the abutting protrusions 13 continuously changes, thereby driving the connecting base 3 to make continuous and precise displacement along the first direction. This adjustment method can meet the needs of fine-tuning the position of components such as hidden doors in furniture. Furthermore, the two abutting protrusions 13 constrain and drive the cochlear-shaped protrusion 411 from both sides. This symmetrical layout ensures that the rotating component 41 is subjected to uniform force during rotation, reducing shaking and jamming caused by uneven force on one side. The contact surface between the rib 411 and the abutting protrusion 13 can maintain a relatively stable contact state during rotation, ensuring the smoothness of transmission, making the movement of the connecting seat 3 smoother, and avoiding noise and vibration caused by unstable transmission.

[0034] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, a first operating part 412 is provided on the side of the rotating member 41 away from the mounting base 1. The first operating part 412 is used to connect with an operating tool (such as a screwdriver or wrench). The connecting base 3 is provided with a first adjustment hole 32, and the first operating part 412 is rotatably disposed in the first adjustment hole 32.

[0035] It should be noted that in some other embodiments, the first adjustment structure 4 may also be, but is not limited to, a gear and rack structure. The choice can be made according to actual needs, and no single limitation is made here.

[0036] like Figure 1 and Figure 2As shown, in one embodiment, the wheel assembly 2 includes a wheel body 21 and a wheel seat 22. The wheel body 21 is disposed on the wheel seat 22, and the mounting base 1 is connected to the wheel seat 22. A third adjustment structure 6 is provided between the mounting base 1 and the wheel seat 22. The third adjustment structure 6 is used to adjust the vertical position of the mounting base 1 relative to the wheel seat 22. Thus, during the installation and use of the furniture hidden door, due to factors such as uneven ground and installation errors, the door body 8 may be uneven, with one end higher than the other. By operating the third adjustment structure 6, the height of the mounting base 1 can be precisely adjusted, thereby moving the entire door body 8 vertically and keeping the door body 8 horizontal, ensuring that the door body 8 can open and close smoothly, and improving the installation accuracy and performance of the door body 8.

[0037] like Figure 1 and Figure 2 As shown, in one embodiment, the third adjustment structure 6 includes a fastener 61, a fastening hole 14 disposed on the mounting base 1, and a connecting groove 221 disposed on the wheel seat 22. The connecting groove 221 is arranged vertically, and the fastener 61 is detachably connected to the fastening hole 14 and the connecting groove 221. Thus, the connecting groove 221 is arranged vertically, and the fastener 61 is detachably connected to the fastening hole 14 and the connecting groove 221. By loosening the fastener 61, the mounting base 1 can move freely vertically along the connecting groove 221 on the wheel seat 22. The user can adjust the mounting base 1 to a precise position according to actual needs, and then tighten the fastener 61 to fix it. Furthermore, the third adjustment structure 6 consists only of the fastener 61, the fastening hole 14, and the connecting groove 221, resulting in a simple and clear structure. This simple structure reduces the number and complexity of components, lowers the probability of failure, and improves the reliability of the structure. Meanwhile, the connection between each component is clear, and the fastener 61 fits tightly with the fastening hole 14 and the connecting groove 221, which can withstand the various forces generated during the sliding of the door body 8 and ensure the stable operation of the wheel assembly 2.

[0038] like Figure 1 and Figure 2 As shown, in one embodiment, both the mounting base 1 and the wheel seat 22 are provided with a rotating hole 15 and a rotating column 222, which is rotatably connected to the rotating hole 15. This rotatable connection design of the rotating column 222 and the rotating hole 15 overcomes the limitation of single-direction adjustment, allowing the mounting base 1 to rotate slightly relative to the wheel seat 22 at multiple angles. In the installation of hidden doors in furniture, in addition to the common horizontal and vertical adjustments, this rotational adjustment function can precisely correct the position of the mounting base 1 when encountering complex situations such as non-perpendicular walls or slightly tilted floors.

[0039] like Figure 6As shown, this application embodiment also provides a furniture concealed door, including the pulley mechanism as described in any of the above embodiments, and further including a track 7, a door body 8, and a hinge 9. The track 7 is used to install on the cabinet 10 or the wall. The wheel assembly 2 is slidably mounted on the track 7 in the horizontal direction. The door body 8 is rotatably connected to the connecting seat 3 via the hinge 9. Under the guidance of the hinge 9, the door body 8 can rotate relative to the connecting seat 3 between the closed position and the open position. Under the guidance of the pulley mechanism, the door body 8 in the open position can slide to one side of the cabinet 10 or the cavity to achieve concealment. Thus, the door body 8 is rotatably connected to the connecting seat 3 via the hinge 9. Under the guidance of the hinge 9, the door body 8 can rotate flexibly between the closed position and the open position. Furthermore, through the cooperation of the pulley mechanism and the track 7, the door body 8 can slide smoothly in the horizontal direction. Under the guidance of the pulley mechanism, the door body 8 can slide to one side of the cabinet 10 or the cavity to achieve perfect concealment without occupying additional external space, making the space more neat and open.

[0040] In one embodiment, the furniture concealed door further includes a connecting plate 20, which is fixedly connected to the connecting seat 3, and a hinge 9 is connected between the connecting plate 20 and the door body 8.

[0041] It should be noted that in some other embodiments, the connecting plate 20 may not be provided, and the hinge 9 may be connected between the connecting seat 3 and the door body 8.

[0042] In one embodiment, the furniture concealed door includes two pulley mechanisms, which are arranged vertically at intervals. A connecting plate 20 is arranged vertically, and both ends of the connecting plate 20 are respectively connected to the connecting seats 3 of the two pulley mechanisms so that the two pulley mechanisms can slide synchronously.

[0043] In summary, the pulley mechanism and the furniture concealed door including it disclosed in this utility model can bring at least the following beneficial technical effects: (1) By setting the first adjustment structure 4 and the second adjustment structure 5, the installer can first complete the installation roughly, and then drive the first adjustment structure 4 and the second adjustment structure 5 to flexibly adjust the position of the connecting seat 3 relative to the mounting seat 1, so as to quickly and accurately put the pulley mechanism in the best installation position. (2) By adjusting the position of the connecting seat 3 in the first direction using the first adjustment structure 4, the door 8 can be slid to the cabinet 10 or the side of the wall and placed in a deeper position, reducing the protruding part of the door 8 and making the overall appearance of the hidden door of the furniture neater and more beautiful. (3) By using the second adjustment structure 5 to adjust the position of the connecting seat 3 in the second direction, the position of the door 8 in the direction perpendicular to the sliding direction can be precisely adjusted. Through reasonable adjustment, the distance between the door 8 and the cabinet 10 or the wall in the sliding direction can be precisely controlled. (4) By operating the third adjustment structure 6, the height of the mounting base 1 can be precisely adjusted, thereby driving the entire door 8 to move in the vertical direction, keeping the door 8 in a horizontal state, ensuring that the door 8 can open and close smoothly, and improving the installation accuracy and performance of the door 8.

[0044] 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 mechanism for concealed doors in furniture, characterized in that, include: Mounting base (1); A wheel assembly (2) is disposed on the mounting base (1), and the wheel assembly (2) is slidably disposed on the track (7) in the horizontal direction; A connecting seat (3) is used to connect the hinge (9) of the door body (8), and the connecting seat (3) is connected to the mounting seat (1); A first adjustment structure (4) is disposed between the connecting seat (3) and the mounting seat (1). Driving the first adjustment structure (4) can adjust the position of the connecting seat (3) relative to the mounting seat (1) in a first direction, the first direction being parallel to the sliding direction of the wheel assembly (2). The second adjustment structure (5) is disposed between the connecting seat (3) and the mounting seat (1). Driving the second adjustment structure (5) can adjust the position of the connecting seat (3) relative to the mounting seat (1) in a second direction, the second direction being parallel to the horizontal direction and perpendicular to the first direction.

2. The pulley mechanism according to claim 1, characterized in that, The mounting base (1) is provided with a first slide groove (11) extending along the first direction, and the second adjustment structure (5) includes an adjustment rod (51) arranged along the second direction. The adjustment rod (51) is threaded to the connecting base (3) and rotatably connected to the first slide groove (11).

3. The pulley mechanism according to claim 2, characterized in that, The adjusting rod (51) has a connecting ring groove (511) on its periphery, and a limiting groove wall (111) is provided in the first sliding groove (11). The connecting ring groove (511) and the limiting groove wall (111) are engaged with each other.

4. The pulley mechanism according to claim 2, characterized in that, The mounting base (1) is provided with a second slide groove (12) extending along the first direction. The first slide groove (11) and the second slide groove (12) are spaced apart. The connecting base (3) is provided with a guide post (31), and the guide post (31) slides in the second slide groove (12).

5. The pulley mechanism according to any one of claims 1-4, characterized in that, The first adjustment structure (4) includes a rotating member (41), which is rotatably connected to the connecting seat (3). When the rotating member (41) rotates, it can drive the connecting seat (3) to move along the first direction.

6. The pulley mechanism according to claim 5, characterized in that, The rotating component (41) is provided with a cochlear-shaped protrusion (411), and the mounting base (1) is provided with two abutting protrusions (13). The protrusion (411) is connected to the two abutting protrusions (13).

7. The pulley mechanism according to any one of claims 1-4, characterized in that, The wheel assembly (2) includes a wheel body (21) and a wheel seat (22). The wheel body (21) is disposed on the wheel seat (22). The mounting seat (1) is connected to the wheel seat (22). A third adjustment structure (6) is provided between the mounting seat (1) and the wheel seat (22). The third adjustment structure (6) is used to adjust the position of the mounting seat (1) relative to the wheel seat (22) in the vertical direction.

8. The pulley mechanism according to claim 7, characterized in that, The third adjustment structure (6) includes a fastener (61), a fastening hole (14) provided in the mounting base (1) and a connecting groove (221) provided in the wheel seat (22). The connecting groove (221) is provided in the vertical direction, and the fastener (61) is detachably connected to the fastening hole (14) and the connecting groove (221).

9. The pulley mechanism according to claim 7, characterized in that, The mounting base (1) and the wheel seat (22) are provided with a rotating hole (15) on one side and a rotating column (222) on the other side. The rotating column (222) and the rotating hole (15) are rotatably connected.

10. A furniture concealed door, characterized in that, The pulley mechanism as described in any one of claims 1-9 further includes a track (7), a door body (8), and a hinge (9), wherein the wheel assembly (2) is slidably disposed on the track (7) in the horizontal direction, and the door body (8) is rotatably connected to the connecting seat (3) via the hinge (9).

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