Pulley assembly and drifting door and window system comprising same

Abstract

The utility model discloses a pulley assembly and a drifting door and window system comprising the same. The pulley assembly comprises a first pulley seat; the first swing arm is rotationally connected to the first pulley seat, and the first swing arm can rotate between a storage position and an unfolding position relative to the first pulley seat; and the elastic assembly is in transmission connection with the first swing arm, and the elastic assembly is used for elastically driving the first swing arm to rotate to the storage position or the unfolding position in the rotating process. When rotating, the first swing arms can act on the elastic assembly to enable the elastic assembly to deform so as to generate elastic potential energy, and the elastic assembly can provide driving force for the first swing arms close to the storage position or the unfolding position by restoring deformation, so that the first swing arms close to the storage position are driven to rotate to the storage position. Or the first swing arm close to the unfolding position is driven to rotate to the unfolding position, in this way, it can be ensured that the first swing arm reaches the storage position or the unfolding position in the rotating process, and then the problem that the first swing arm is not rotated in place is avoided.

Description

Technical Field

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

[0002] Side-sliding doors and windows, known as drifting doors and windows in the market, have the property of being able to move the door and window sashes horizontally out of the door and window frames and make the door and window sashes slide in a straight line outside the door and window frames, so that they do not take up too much extra space and have a large opening area.

[0003] The pulley assembly of the drifting door and window includes a pulley seat and a swing arm. The pulley seat is slidably connected to the track of the door and window sash, and the swing arm is rotatably connected to the pulley seat and rotatably connected to the door and window sash. The swing arm can rotate between a storage position and a deployment position relative to the pulley seat. The door and window sash can be moved out of or into the door and window frame through the action of the swing arm. Specifically, when the swing arm is in the storage position, the door and window sash moves into the door and window frame, and when the swing arm is in the deployment position, the door and window sash moves out of the door and window frame. However, during the rotation process, the swing arm may stop before reaching the storage position or before reaching the deployment position. That is to say, the swing arm may not rotate into place when switching between the storage position and the deployment position, thereby causing the door and window sash connected to the swing arm to not move into place. Utility Model Content

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, the utility model provides a pulley assembly and a drifting door and window system including the same, which can prevent the first swing arm from stopping before reaching the storage position or before reaching the deployment position during the rotation process, thereby ensuring that the first swing arm reaches the storage position or the deployment position during the rotation process, thereby avoiding the problem of the first swing arm not being able to rotate into place.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A pulley assembly comprises: a first pulley seat; a first swing arm, rotatably connected to the first pulley seat, the first swing arm being rotatable relative to the first pulley seat between a storage position and an extended position; an elastic component, transmission-connected to the first swing arm, the elastic component being used to elastically drive the first swing arm to rotate to the storage position or the extended position during rotation.

[0007] According to some embodiments of the present utility model, the pulley assembly includes a first rotating shaft, the first rotating shaft is connected to the first pulley seat, and the first swing arm rotates around the first rotating shaft; the elastic assembly includes a first transmission arm and a first elastic member, a first end of the first transmission arm is hinged to the first swing arm through a first hinge shaft, a second end of the first transmission arm is hinged to the first pulley seat through a second hinge shaft, and the first elastic member is disposed between the first hinge shaft and the second hinge shaft; when the first swing arm rotates around the first rotating shaft, the relative distance between the first hinge shaft and the second hinge shaft changes to cause elastic deformation of the first elastic member; the first elastic member drives the first swing arm to rotate to the storage position or the deployment position during the rotation process by restoring the deformation.

[0008] According to some embodiments of the present utility model, the first transmission arm is provided with a first waist-shaped slot, the second hinge shaft is slidably connected to the first waist-shaped slot, and the second hinge shaft can move along the first waist-shaped slot to change the relative distance from the first hinge shaft.

[0009] According to some embodiments of the present utility model, the first transmission arm is provided with a first installation cavity, the first elastic member is disposed in the first installation cavity, one end of the first elastic member abuts against the inner cavity wall of the first installation cavity, and the other end of the first elastic member abuts against the second hinge shaft.

[0010] According to some embodiments of the present utility model, the second hinge shaft includes a shaft body and two limiting platforms, the shaft body is slidably connected to the first waist-shaped slot, the two limiting platforms are spaced along the axial direction of the shaft body, and the two limiting platforms are clamped on both sides of the first transmission arm.

[0011] According to some embodiments of the present utility model, the first pulley seat has a connecting bottom wall and a connecting top wall arranged oppositely, one end of the first rotating shaft is connected to the connecting bottom wall, and the other end of the first rotating shaft is connected to the connecting top wall.

[0012] According to some embodiments of the present utility model, a first connecting block is provided at a first end of the first transmission arm, a second connecting block is provided on one side of the first swing arm, the first connecting block and the second connecting block are arranged oppositely, and the first hinge shaft is connected to the first connecting block and the second connecting block.

[0013] According to some embodiments of the present utility model, a first arc-shaped slot is provided at a first end of the first transmission arm, and a second arc-shaped slot is provided on one side of the first swing arm; the first connecting block is located in the second arc-shaped slot, and the second connecting block is located in the first arc-shaped slot.

[0014] In addition, the utility model also provides a drifting door and window system, including the pulley assembly as described above, and also including a door and window frame and a door and window sash, the door and window frame has a door and window track, the first pulley seat is slidably arranged on the door and window track, and the first swing arm is rotatably connected to the door and window sash.

[0015] According to some embodiments of the utility model, the door and window track includes an upper track and a lower track, the first pulley seat is slidably connected to the upper track, and the first swing arm is rotatably connected to the upper side of the door and window sash; the drift door and window system also includes a pulley mechanism, the pulley mechanism includes a second pulley seat, a second swing arm and an elastic mechanism, the second pulley seat is slidably connected to the lower track, the second swing arm is rotatably connected to the second pulley seat and rotatably connected to the lower side of the door and window sash, the second swing arm can rotate between a storage state and a deployment state relative to the second pulley seat, the elastic mechanism is transmission-connected to the second swing arm, and the elastic mechanism is used to elastically drive the second swing arm to rotate to the storage state or the deployment state during the rotation process.

[0016] In summary, the pulley assembly and the drifting door and window system including the pulley assembly provided by the utility model have at least the following technical effects:

[0017] When rotating, the first swing arm can act on the elastic component to cause the elastic component to deform and thus generate elastic potential energy. The elastic component can restore the deformation to provide driving force to the first swing arm close to the storage position or close to the deployed position, thereby driving the first swing arm close to the storage position to rotate to the storage position, or driving the first swing arm close to the deployed position to rotate to the deployed position. In this way, the first swing arm can be prevented from stopping before reaching the storage position or before reaching the deployed position during the rotation process, thereby ensuring that the first swing arm reaches the storage position or the deployed position during the rotation process, thereby avoiding the problem of the first swing arm not being able to rotate into place. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the pulley assembly (in the storage position) of an embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the pulley assembly (in the unfolded position) of an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the exploded structure of the pulley assembly (in the deployed position) of the embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the pulley mechanism (in the storage state) of an embodiment of the utility model;

[0022] Figure 5Schematic diagram of the pulley mechanism (when in the deployed state) according to an embodiment of the present utility model;

[0023] Figure 6 Exploded structural schematic diagram of the pulley mechanism (when in the deployed state) according to an embodiment of the present utility model;

[0024] Figure 7 Schematic diagram of the drift door and window system (when the door and window sash moves into the door and window frame) according to an embodiment of the present utility model;

[0025] Figure 8 Schematic diagram of the drift door and window system (when the door and window sash moves out of the door and window frame) according to an embodiment of the present utility model.

[0026] Among them, the meanings of the reference numerals are as follows:

[0027] 100, pulley assembly; 1, first pulley seat; 11, connecting bottom wall; 12, connecting top wall; 2, first swing arm; 21, second connecting block; 22, second arc-shaped groove; 3, elastic component; 31, first transmission arm; 311, first waist-shaped groove; 312, first installation cavity; 313, first connecting block; 314, first arc-shaped groove; 32, first elastic member; 33, first hinge shaft; 34, second hinge shaft; 341, shaft body; 342, limiting platform; 4, first rotating shaft; 5, pulley mechanism; 51, second pulley seat; 52, second swing arm; 53, elastic mechanism; 531, second transmission arm; 5311, second waist-shaped groove; 532, second elastic member; 533, third hinge shaft; 534, fourth hinge shaft; 54, second rotating shaft; 6, door and window frame; 61, upper track; 62, lower track; 7, door and window sash. Detailed implementation manners

[0028] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled 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.

[0031] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0032] See also Figure 1 , Figure 2 and Figure 3 The present embodiment discloses a pulley assembly 100 for a drifting door and window system, the pulley assembly 100 comprises a first pulley seat 1, a first swing arm 2 and an elastic assembly 3; the first swing arm 2 is rotatably connected to the first pulley seat 1, and the first swing arm 2 can rotate between a storage position and a deployment position relative to the first pulley seat 1; the elastic assembly 3 is transmission-connected to the first swing arm 2, and the elastic assembly 3 is used to elastically drive the first swing arm 2 to rotate to the storage position or the deployment position during the rotation process.

[0033] Also, see Figures 4 to 8 The present embodiment also discloses a drifting door and window system, comprising the pulley assembly 100 as described above, and also comprising a door and window frame 6 and a door and window sash 7. Specifically, in the present embodiment, the door and window track comprises an upper track 61 and a lower track 62, the first pulley seat 1 is slidably connected to the upper track 61, and the first swing arm 2 is rotatably connected to the upper side of the door and window sash 7; the drifting door and window system also comprises a pulley mechanism 5, the pulley mechanism 5 comprises a second pulley seat 51, a second swing arm 52 and an elastic mechanism 53, the second pulley seat 51 is slidably connected to the lower track 62, the second swing arm 52 is rotatably connected to the second pulley seat 51 and is rotatably connected to the lower side of the door and window sash 7, the second swing arm 52 can rotate between a storage state and an expanded state relative to the second pulley seat 51, the elastic mechanism 53 is transmission-connected to the second swing arm 52, and the elastic mechanism 53 is used to elastically drive the second swing arm 52 to rotate to a storage state or an expanded state during the rotation process.

[0034] Specifically, Figure 1 , Figure 4 and Figure 7 As shown, in this embodiment, when the first swing arm 2 rotates to the storage position relative to the first pulley seat 1 and the second swing arm 52 rotates to the storage state relative to the second pulley seat 51, the door and window sash 7 moves into the door and window frame 6; Figure 2 , Figure 5 and Figure 8 As shown, when the first swing arm 2 rotates to the unfolded position relative to the first pulley seat 1 and the second swing arm 52 rotates to the unfolded position relative to the second pulley seat 51, the door and window sash 7 moves out of the door and window frame 6 and can slide along the door and window track outside the door and window frame 6.

[0035] A pulley assembly 100 provided in this embodiment. When the first swing arm 2 rotates, it can act on the elastic assembly 3 to cause the elastic assembly 3 to deform and generate elastic potential energy. The elastic assembly 3 can provide a driving force to the first swing arm 2 close to the storage position or the deployment position by restoring the deformation, so as to drive the first swing arm 2 close to the storage position to rotate to the storage position, or drive the first swing arm 2 close to the deployment position to rotate to the deployment position. In this way, it can be avoided that the first swing arm 2 stops before reaching the storage position or before reaching the deployment position during the rotation process, so that the first swing arm 2 can be assisted to reach the storage position or the deployment position during the rotation process, and further avoid the problem that the first swing arm 2 cannot rotate in place.

[0036] As Figure 1 , Figure 2 and Figure 3 shown, specifically, in this embodiment, the pulley assembly 100 includes a first rotating shaft 4. The first rotating shaft 4 is connected to the first pulley seat 1. The first swing arm 2 rotates around the first rotating shaft 4 between the storage position and the deployment position. Preferably, in this embodiment, the elastic assembly 3 includes a first transmission arm 31 and a first elastic member 32. The first end of the first transmission arm 31 is hinged to the first swing arm 2 through a first hinge shaft 33. The second end of the first transmission arm 31 is hinged to the first pulley seat 1 through a second hinge shaft 34. The first elastic member 32 is arranged between the first hinge shaft 33 and the second hinge shaft 34. When the first swing arm 2 rotates around the first rotating shaft 4, the relative distance between the first hinge shaft 33 and the second hinge shaft 34 changes to cause the first elastic member 32 to generate elastic deformation. The first elastic member 32 can drive the transmission arm to move by restoring the deformation, so as to provide a driving force to the first swing arm 2 close to the storage position or the deployment position, and further assist in driving the first swing arm 2 close to the storage position to rotate to the storage position, or assist in driving the first swing arm 2 close to the deployment position to rotate to the deployment position.

[0037] More specifically, in this embodiment, the first swing arm 2 can rotate relative to the first pulley seat 1 to the intermediate position. When the first swing arm 2 rotates from the storage position or the deployment position towards the intermediate position, the relative distance between the first hinge shaft 33 and the second hinge shaft 34 gradually decreases. At this time, the first elastic member 32 is pushed to generate deformation. When the first swing arm 2 rotates from the intermediate position towards the storage position or the deployment position, the relative distance between the first hinge shaft 33 and the second hinge shaft 34 gradually increases. At this time, the first elastic member 32 restores the deformation to assist in driving the first transmission arm 31 to move (that is, to assist in increasing the relative distance between the first hinge shaft 33 and the second hinge shaft 34), so as to provide a driving force for the rotation of the first swing arm 2, and further assist in driving the first swing arm 2 close to the storage position to rotate to the storage position, or assist in driving the first swing arm 2 close to the deployment position to rotate to the deployment position.

[0038] AsFigure 3 As shown, preferably, in this embodiment, the first transmission arm 31 is provided with a first waist-shaped slot 311, and the second hinge shaft 34 is slidably connected to the first waist-shaped slot 311. The second hinge shaft 34 can move along the first waist-shaped slot 311 to change the relative distance from the first hinge shaft 33. In this way, it provides guidance for the movement of the second hinge shaft 34 relative to the first hinge shaft 33.

[0039] As Figure 3 shown, preferably, in this embodiment, the second hinge shaft 34 includes a shaft body 341 and two limiting platforms 342. The shaft body 341 is slidably connected to the first waist-shaped slot 311. The two limiting platforms 342 are arranged at intervals along the axial direction of the shaft body 341, and the two limiting platforms 342 are clamped on both sides of the first transmission arm 31. In this way, it avoids the problem of tilting when the second hinge shaft 34 moves relative to the first hinge shaft 33, thereby ensuring the cooperation stability between the first swing arm 2 and the first transmission arm 31.

[0040] Specifically, in this embodiment, the first hinge shaft 33 and the second hinge shaft 34 always remain parallel.

[0041] Preferably, in this embodiment, in order to improve the structural compactness and reduce the occupied space, the first transmission arm 31 is provided with a first installation cavity 312. The first elastic member 32 is arranged in the first installation cavity 312. One end of the first elastic member 32 abuts against the inner cavity wall of the first installation cavity 312, and the other end of the first elastic member 32 abuts against the second hinge shaft 34.

[0042] As Figure 3 shown, preferably, in this embodiment, the first pulley seat 1 has a connecting bottom wall 11 and a connecting top wall 12 arranged oppositely. One end of the first rotating shaft 4 is connected to the connecting bottom wall 11, and the other end of the first rotating shaft 4 is connected to the connecting top wall 12. In this way, it improves the installation stability of the first rotating shaft 4, thereby improving the rotation stability of the first swing arm 2 relative to the first pulley seat 1.

[0043] Preferably, in this embodiment, a first connecting block 313 is provided at the first end of the first transmission arm 31, and a second connecting block 21 is provided on one side of the first swing arm 2. The first connecting block 313 and the second connecting block 21 are arranged oppositely, and the first hinge shaft 33 is connected to the first connecting block 313 and the second connecting block 21. In this way, it improves the hinge stability between the first transmission arm 31 and the first swing arm 2.

[0044] As Figure 3As shown, more preferably, in this embodiment, a first arc-shaped groove 314 is provided at the first end of the first transmission arm 31, and a second arc-shaped groove 22 is provided on one side of the first swing arm 2; the first connection block 313 is located in the second arc-shaped groove 22, and the second connection block 21 is located in the first arc-shaped groove 314, so as to avoid interference problems when the first transmission arm 31 and the first swing arm 2 rotate relative to each other.

[0045] It should be noted that in this embodiment, the structure and function of the elastic mechanism 53 are similar to those of the elastic component 3. Specifically, as Figure 4 、 Figure 5 and Figure 6 shown, in this embodiment, the pulley mechanism 5 includes a second rotating shaft 54, the second rotating shaft 54 is connected to the second pulley seat 51, and the second swing arm 52 rotates around the second rotating shaft 54 between the storage state and the deployment state; preferably, in this embodiment, the elastic mechanism 53 includes a second transmission arm 531 and a second elastic member 532, the first end of the second transmission arm 531 is hinged to the second swing arm 52 through a third hinge shaft 533, the second end of the second transmission arm 531 is hinged to the second pulley seat 51 through a fourth hinge shaft 534, and the second elastic member 532 is arranged between the third hinge shaft 533 and the fourth hinge shaft 534; when the second swing arm 52 rotates around the second rotating shaft 54, the relative distance between the third hinge shaft 533 and the fourth hinge shaft 534 changes to cause elastic deformation of the second elastic member 532; the second elastic member 532 can drive the transmission arm to move by restoring the deformation, so as to provide a driving force for the second swing arm 52 approaching the storage state or the deployment state, and further assist in driving the second swing arm 52 approaching the storage state to rotate to the storage state, or assist in driving the second swing arm 52 approaching the deployment state to rotate to the deployment state.

[0046] As Figure 4 、 Figure 5 and Figure 6 shown, more specifically, in this embodiment, the second swing arm 52 can rotate relative to the second pulley seat 51 to the intermediate position. When the second swing arm 52 rotates from the storage state or the deployment state towards the intermediate position, the relative distance between the third hinge shaft 533 and the fourth hinge shaft 534 gradually decreases, and at this time the second elastic member 532 is pushed to generate deformation; when the second swing arm 52 rotates from the intermediate position towards the storage state or the deployment state, the relative distance between the third hinge shaft 533 and the fourth hinge shaft 534 gradually increases, and at this time the second elastic member 532 restores the deformation to assist in driving the movement of the second transmission arm 531 (that is, to assist in increasing the relative distance between the third hinge shaft 533 and the fourth hinge shaft 534), so as to provide a driving force for the rotation of the second swing arm 52, and further assist in driving the second swing arm 52 approaching the storage state to rotate to the storage state, or assist in driving the second swing arm 52 approaching the deployment state to rotate to the deployment state.

[0047] As Figure 6 shown, preferably, in this embodiment, the second transmission arm 531 is provided with a second waist-shaped groove 5311, and the fourth hinge shaft 534 is slidably connected to the second waist-shaped groove 5311. The fourth hinge shaft 534 can move along the second waist-shaped groove 5311 to change the relative distance from the third hinge shaft 533. In this way, it provides guidance for the movement of the fourth hinge shaft 534 relative to the third hinge shaft 533.

[0048] In summary, the pulley assembly 100 disclosed by the present utility model and the drift window and door system including the same can at least bring the following beneficial technical effects:

[0049] 1) It can prevent the first swing arm 2 from stopping before reaching the storage position or before reaching the deployment position during the rotation process, so as to assist the first swing arm 2 to reach the storage position or the deployment position during the rotation process, and further avoid the problem of the first swing arm 2 not rotating in place;

[0050] 2) The first waist-shaped groove 311 can provide guidance for the movement of the second hinge shaft 34 relative to the first hinge shaft 33, and the second waist-shaped groove 5311 can provide guidance for the movement of the fourth hinge shaft 534 relative to the third hinge shaft 533;

[0051] 3) The two limiting platforms 342 are arranged at intervals along the axial direction of the shaft body 341 to prevent the second hinge shaft 34 from tilting when moving relative to the first hinge shaft 33, thereby ensuring the cooperation stability between the first swing arm 2 and the first transmission arm 31;

[0052] 4) The first elastic member 32 is arranged in the first installation cavity 312 to make the overall structure of the pulley mechanism 5 more compact, thereby reducing the occupied space.

[0053] The technical means disclosed by the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. Pulley assembly (100), characterized in that, Comprising: A first pulley seat (1); A first swing arm (2) rotatably connected to the first pulley seat (1), the first swing arm (2) being rotatable relative to the first pulley seat (1) between a storage position and a deployed position; An elastic component (3) drivingly connected to the first swing arm (2), the elastic component (3) being configured to elastically drive the first swing arm (2) to rotate to the storage position or the deployed position during rotation.

2. The pulley assembly (100) according to claim 1, wherein, The pulley assembly (100) includes a first rotating shaft (4), the first rotating shaft (4) being connected to the first pulley seat (1), and the first swing arm (2) rotating around the first rotating shaft (4); The elastic component (3) includes a first transmission arm (31) and a first elastic member (32), a first end of the first transmission arm (31) being hinged to the first swing arm (2) through a first hinge shaft (33), a second end of the first transmission arm (31) being hinged to the first pulley seat (1) through a second hinge shaft (34), and the first elastic member (32) being disposed between the first hinge shaft (33) and the second hinge shaft (34); When the first swing arm (2) rotates around the first rotating shaft (4), the relative distance between the first hinge shaft (33) and the second hinge shaft (34) changes to cause elastic deformation of the first elastic member (32); the first elastic member (32) drives the first swing arm (2) to rotate to the storage position or the deployed position during rotation by restoring deformation.

3. The pulley assembly (100) according to claim 2, wherein, The first transmission arm (31) is provided with a first waist-shaped slot (311), the second hinge shaft (34) being slidably connected to the first waist-shaped slot (311), and the second hinge shaft (34) being movable along the first waist-shaped slot (311) to change the relative distance from the first hinge shaft (33).

4. The pulley assembly (100) according to claim 3, wherein, The first transmission arm (31) is provided with a first installation cavity (312), the first elastic member (32) being disposed in the first installation cavity (312), one end of the first elastic member (32) abutting against the inner cavity wall of the first installation cavity (312), and the other end of the first elastic member (32) abutting against the second hinge shaft (34).

5. The pulley assembly (100) according to claim 3, characterized in that, The second hinge shaft (34) includes a shaft body (341) and two limiting platforms (342), the shaft body (341) being slidably connected to the first waist-shaped slot (311), the two limiting platforms (342) being spaced along the axial direction of the shaft body (341), and the two limiting platforms (342) clamping both sides of the first transmission arm (31).

6. The pulley assembly (100) according to claim 2, characterized in that, The first pulley seat (1) has a connecting bottom wall (11) and a connecting top wall (12) arranged oppositely, one end of the first rotating shaft (4) being connected to the connecting bottom wall (11), and the other end of the first rotating shaft (4) being connected to the connecting top wall (12).

7. The pulley assembly (100) according to claim 2, characterized in that, A first connecting block (313) is provided at the first end of the first transmission arm (31), a second connecting block (21) is provided at one side of the first swing arm (2), the first connecting block (313) and the second connecting block (21) are arranged opposite to each other, and the first hinge shaft (33) is connected to the first connecting block (313) and the second connecting block (21).

8. The pulley assembly (100) according to claim 7, characterized in that, A first arc-shaped groove (314) is provided at the first end of the first transmission arm (31), and a second arc-shaped groove (22) is provided at one side of the first swing arm (2); the first connecting block (313) is located in the second arc-shaped groove (22), and the second connecting block (21) is located in the first arc-shaped groove (314).

9. Drifting door and window system, characterized in that, It comprises a pulley assembly (100) as described in any one of claims 1 to 8, and also comprises a door and window frame (6) and a door and window sash (7), wherein the door and window frame (6) has a door and window track, the first pulley seat (1) is slidably arranged on the door and window track, and the first swing arm (2) is rotatably connected to the door and window sash (7).

10. The drift door and window system according to claim 9, wherein The door and window track comprises an upper track (61) and a lower track (62), the first pulley seat (1) is slidably connected to the upper track (61), and the first swing arm (2) is rotatably connected to the upper side of the door and window sash (7); the drift door and window system also comprises a pulley mechanism (5), the pulley mechanism (5) comprises a second pulley seat (51), a second swing arm (52) and an elastic mechanism (53), the second pulley seat (51) is slidably connected to the lower track (62), the second swing arm (52) is rotatably connected to the second pulley seat (51) and is rotatably connected to the lower side of the door and window sash (7), the second swing arm (52) can rotate between a storage state and an expanded state relative to the second pulley seat (51), the elastic mechanism (53) is transmission-connected to the second swing arm (52), and the elastic mechanism (53) is used to elastically drive the second swing arm (52) to rotate to the storage state or the expanded state during the rotation process.

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