Hanging wheel structure and door and window thereof

Abstract

The utility model provides a hanger rail structure and a door and window thereof, the hanger rail structure comprises a pulley block and a pulley mounting rack, the pulley block comprises a first pulley and a second pulley, the width of the first pulley is smaller than that of a notch of a hanger rail mounting groove, and the width of the second pulley is smaller than that of the notch of the hanger rail mounting groove. The first pulley is slidably connected to the pulley mounting frame in the width direction of the pulley mounting frame, and the first pulley is rotatably connected to the pulley mounting frame and used for being connected to the pulley mounting frame in a sliding interval of the first pulley. The first pulley is upwards screwed into or downwards screwed out of the hanger rail mounting groove along the notch of the hanger rail mounting groove; and the second pulley is connected to the pulley mounting frame and is used for being hung on the hanger rail before the first pulley is screwed into the hanger rail mounting groove. The hanging wheel structure does not need to be inserted from the two sides of the top edge profile of the frame body, the hanging wheel structure and installation of the whole window are simplified, and the machining efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window hardware, and particularly relates to a hanging wheel structure. Background Art

[0002] The pulley cooperates with a slide rail fixed on the door frame to hoist the door leaf, so as to achieve the purpose of lateral movement of the door leaf. When installing a sliding door and window with a hanging rail, it is necessary to first insert the pulley from both sides of the top edge profile of the frame body into the hanging rail inside the frame body, and then install the top edge profile of the frame body and the pulley to form an integral body first, and then install other side frames of the frame body and the fan body. The installation process is complex and the production efficiency is low. Content of the Utility Model

[0003] The purpose of the utility model is to provide a hanging wheel structure, so as to realize that the pulley can be installed on the hanging rail from the notch direction of the hanging rail installation groove of the top edge profile of the frame body, so as to improve the installation efficiency of the door and window.

[0004] The first aspect of the utility model provides a hanging wheel structure, which includes a pulley mounting bracket and a pulley set. The pulley set is slidably connected to the hanging rail of the frame body, and the hanging rail is arranged on both sides of the notch of the hanging rail installation groove on the frame body;

[0005] Wherein, the pulley set includes a first pulley and a second pulley. The width of the first pulley is smaller than the width of the notch of the hanging rail installation groove. The first pulley is slidably connected to the pulley mounting bracket along the width direction of the pulley mounting bracket, and the first pulley is rotatably connected to the pulley mounting bracket, so as to enable the first pulley to be screwed into or out of the hanging rail installation groove upward or downward along the notch of the hanging rail installation groove within the sliding range of the first pulley; the second pulley is connected to the pulley mounting bracket and is used for hanging on the hanging rail before the first pulley is screwed into the hanging rail installation groove.

[0006] Optionally, the second pulley is fixedly connected to the pulley mounting bracket, and is used for vertically or obliquely inserting the second pulley and the pulley mounting bracket into the hanging rail installation groove from bottom to top before the first pulley is screwed into the hanging rail installation groove, and the second pulley is hung on the hanging rail.

[0007] Optionally, the second pulley is slidably connected to the pulley mounting bracket along the width direction of the pulley mounting bracket, and is used for vertically or obliquely inserting the second pulley and the pulley mounting bracket into the hanging rail installation groove from bottom to top within the sliding range of the second pulley before the first pulley is screwed into the hanging rail installation groove, and the second pulley is hung on the hanging rail.

[0008] Optionally, the first pulley is provided with a first sliding portion, and the pulley mounting bracket is provided with a first sliding connection portion. The first sliding portion is slidably connected to the first sliding connection portion along the width direction of the pulley mounting bracket; the second pulley is provided with a second sliding portion, and the pulley mounting bracket is provided with a second sliding connection portion. The second sliding portion is slidably connected to the second sliding connection portion along the width direction of the pulley mounting bracket.

[0009] Optionally, the first sliding portion is a first sliding hole, the first sliding connection portion is a sliding shaft, the first sliding hole is penetrated by the sliding shaft, the axial direction of the sliding shaft is the same as the width direction of the pulley mounting bracket, the first sliding hole is slidable along the axial direction of the sliding shaft, and the first sliding hole is rotatable along the direction perpendicular to the axial direction of the sliding shaft.

[0010] Optionally, the second sliding portion is a second sliding hole, the second sliding connection portion is the sliding shaft integrally formed with the first sliding connection portion, and the second sliding hole is slidable along the axial direction of the sliding shaft.

[0011] Optionally, the first pulley is further provided with a rotating portion, and the pulley mounting bracket is provided with a rotation braking portion. The rotating portion is used for connecting with the rotation braking portion after the first pulley is screwed into the hanging rail mounting groove to limit the rotation of the first pulley.

[0012] Optionally, the rotating portion is an arc-shaped groove, the rotation braking portion is a positioning shaft, and the axial direction of the positioning shaft is the same as the width direction of the pulley mounting bracket; the arc-shaped groove can be slidably clamped on the positioning shaft after the first pulley is screwed into the hanging rail mounting groove to limit the rotation of the first pulley.

[0013] Optionally, the positioning shaft is provided with a limiting portion for limiting the first pulley to slide between one side of the pulley mounting bracket and the first position of the pulley mounting bracket.

[0014] Optionally, the hanging wheel structure further includes a positioning member disposed between the first pulley and the second pulley for limiting the sliding of the first pulley and the second pulley after the first pulley and the second pulley are respectively located in the corresponding hanging rails.

[0015] Optionally, the positioning member includes a positioning portion, a first engaging portion, and a second engaging portion. The upper ends of the first pulley and the second pulley are respectively provided with first engaging portions, and the lower ends of the first pulley and the second pulley are respectively provided with second engaging portions. The positioning portion is used to be inserted between the first pulley and the second pulley to limit the sliding of the first pulley and the second pulley. The first engaging portion is inserted into the first engaging portion, and the second engaging portion is inserted into the second engaging portion to position the positioning member.

[0016] A second aspect of the present utility model provides a door and window, including a frame body, a sash body, and the above-mentioned hanging wheel structure. The upper end of the hanging wheel structure is slidably connected to the hanging rail of the frame body, and the lower end of the hanging wheel structure is connected to the sash body through a hanging box.

[0017] The beneficial effects of this solution are as follows:

[0018] In the hanging wheel structure of this solution, the first pulley in the pulley group is slidably and rotatably installed on the pulley mounting bracket, and the second pulley is slidably installed on the pulley mounting bracket. By adjusting the relative position between the first pulley and the second pulley, first insert the first pulley and the pulley mounting bracket into the hanging rail installation groove, so that the first pulley is hung on one side of the hanging rail, and then rotate the second pulley into the hanging rail installation groove and hang it on the other side of the hanging rail, so as to realize inserting the hanging wheel structure from the bottom up into the hanging rail installation groove from the notch of the hanging rail installation groove. This hanging wheel structure does not need to be inserted from both sides of the top edge profile of the frame body, simplifies the installation of the hanging wheel structure and the whole window, and can improve the processing efficiency. Description of the Drawings

[0019] Figure 1 It is a partial structural schematic diagram of the hanging rail sliding door and window of the present utility model;

[0020] Figure 2 It is a structural schematic diagram of the hanging wheel structure of the present utility model;

[0021] Figure 3 It is a connection structural schematic diagram of the first pulley and the pulley mounting bracket;

[0022] Figure 4 It is a connection structural schematic diagram of the second pulley and the pulley mounting bracket;

[0023] Figure 5 It is a structural schematic diagram of the first pulley;

[0024] Figure 6 It is a structural schematic diagram of the second pulley;

[0025] Figure 7 It is a structural schematic diagram of the positioning member;

[0026] Figure 8Schematic diagram of the installation process for installing the hanging wheel structure onto the hanging rail.

[0027] Explanation of the reference numerals in the attached drawings:

[0028] 1. Frame; 101. Hanging rail; 102. Hanging rail installation groove; 2. Hanging wheel structure

[0029] 10. Pulley mounting bracket; 11. Sliding shaft; 12. Positioning shaft; 121. Limiting portion

[0030] 20. Pulley set; 21. First pulley; 211. First sliding hole; 212. Arc-shaped groove; 213. First lug portion; 22. Second pulley; 221. Second sliding hole; 222. Second lug portion; 201. First clamping portion; 202. Second clamping portion

[0031] 30. Positioning member; 31. Positioning portion; 32. First engaging portion; 33. Second engaging portion

[0032] 40. Buffer Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These are 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; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the terms in the present utility model can be understood according to specific circumstances.

[0035] See Figure 1, this solution discloses a door and window, which is a suspended-rail 101 type suspended-rail sliding door and window, including a frame body 1, a sash body (not shown in the figure), and a suspended wheel structure 2. The upper end of the suspended wheel structure 2 is slidably connected to the suspended rail 101 of the frame body 1, and the lower end of the suspended wheel structure 2 is connected to the sash body through a suspension box.

[0036] Specifically, referring to Figures 2 - 8 , the suspended wheel structure 2 includes a pulley mounting bracket 10, a buffer 40, and two sets of pulley groups 20. The two sets of pulley groups 20 are respectively arranged on both sides of the pulley mounting bracket 10 and are used to drive the sash body to be slidably connected to the suspended rail 101; the buffer 40 is arranged inside the pulley mounting bracket 10 and is used to buffer when the sash body slides.

[0037] The pulley group 20 is slidably connected to the suspended rail 101 of the frame body 1, and the suspended rail 101 is arranged on both sides of the notch of the suspended rail mounting groove 102 on the frame body 1;

[0038] The pulley group 20 includes a first pulley 21 and a second pulley 22. The width d1 of the first pulley 21 is less than the notch width D of the suspended rail mounting groove 102. The first pulley 21 is slidably connected to the pulley mounting bracket 10 along the width direction of the pulley mounting bracket 10, and the first pulley 21 is rotatably connected to the pulley mounting bracket 10. The first pulley 21 slides within the sliding interval between one side of the pulley mounting bracket 10 and the first position of the pulley mounting bracket 10. Within the sliding interval of the first pulley 21, the first pulley 21 can screw the first slide rail pulley up or down into or out of the suspended rail mounting groove 102 along the notch of the suspended rail mounting groove 102.

[0039] The second pulley 22 is fixedly installed on the pulley mounting bracket 10 or slidably connected to the pulley mounting bracket 10.

[0040] When the second pulley 22 is fixedly connected to the pulley mounting bracket 10, before the first pulley 21 is screwed into the suspended rail mounting groove 102, the second pulley 22 and the pulley mounting bracket 10 are vertically or obliquely inserted into the suspended rail mounting groove 102 from bottom to top, and the first pulley 21 is hung on the suspended rail 101.

[0041] When the second pulley 22 is slidably connected to the pulley mounting bracket 10, the second pulley 22 is slidably connected to the pulley mounting bracket 10 along the width direction of the pulley mounting bracket 10. The second pulley 22 slides within the sliding interval between the other side of the pulley mounting bracket 10 and the second position of the pulley mounting bracket 10. Before the first pulley 21 is screwed into the suspended rail mounting groove 102, the second pulley 22 can be vertically or obliquely inserted into the suspended rail mounting groove 102 from bottom to top with the pulley mounting bracket 10 within the sliding interval, and the first pulley 21 is slidably connected to the suspended rail 101.

[0042] If the second pulley 22 and the pulley mounting bracket 10 in the second position are vertically inserted into the hanging rail mounting groove from bottom to top, when the second pulley 22 is in the second position, the total width d2 of the second pulley 22 and the pulley mounting bracket 10 is less than the notch width D of the hanging rail mounting groove.

[0043] It should be noted that the first pulley 21 and the second pulley 22 in this solution need to be arranged side by side on the pulley mounting bracket 10. When the hanging wheel structure 2 is hung on the hanging rail 101, the first pulley 21 is on one side of the pulley mounting bracket 10, and the second pulley 22 is on the other side of the pulley mounting bracket 10. The first position refers to the position where the first pulley 21 slides to contact the second pulley 22 when the second pulley 22 is on the other side of the pulley mounting bracket 10. The second position refers to the position where the second pulley 22 slides to contact the first pulley 21 when the first pulley 21 is on one side of the pulley mounting bracket 10. It can be understood that the first position and the second position are respectively the sliding limit positions of the first pulley 21 and the second pulley 22, and the first pulley 21 and the second pulley 22 can be inserted into the hanging rail mounting groove 102 without being in the limit positions.

[0044] In the hanging wheel structure 2 of this solution, the first pulley 21 in the pulley set 20 is slidably and rotatably mounted on the pulley mounting bracket 10, and the second pulley 22 is slidably mounted on the pulley mounting bracket 10. By adjusting the relative positions between the first pulley 21 and the second pulley 22, first insert the first pulley 21 and the pulley mounting bracket 10 into the hanging rail mounting groove 102 so that the first pulley 21 is hung on one side of the hanging rail 101, and then screw the second pulley 22 into the hanging rail mounting groove 102 and hang it on the other side of the hanging rail 101 to realize inserting the hanging wheel structure 2 into the hanging rail mounting groove 102 from the notch of the hanging rail mounting groove 102 from bottom to top. This hanging wheel structure 2 does not need to be inserted from both sides of the top edge profile of the frame body 1, simplifies the installation of the hanging wheel structure 2 and the entire window, and can improve the processing efficiency.

[0045] In this embodiment, the first pulley 21 is provided with a first sliding portion, and the pulley mounting bracket 10 is provided with a first sliding connection portion. The first sliding portion is slidably connected to the first sliding connection portion along the width direction of the pulley mounting bracket 10; the second pulley 22 is provided with a second sliding portion, and the pulley mounting bracket 10 is provided with a second sliding connection portion. The second sliding portion is slidably connected to the second sliding connection portion along the width direction of the pulley mounting bracket 10. It can be understood that the sliding range that the first sliding connection portion can drive the first sliding portion is between one side of the pulley mounting bracket 10 and the first position of the pulley mounting bracket 10. The sliding range that the second sliding connection portion can drive the second sliding portion is between the other side of the pulley mounting bracket 10 and the second position of the pulley mounting bracket 10.

[0046] Specifically, the first sliding part is the first sliding hole 211, the first sliding connection part is the sliding shaft 11, the first sliding hole 211 is penetrated through the sliding shaft 11, the axial direction of the sliding shaft 11 is the same as the width direction of the pulley mounting bracket 10, the first sliding hole 211 is slidable along the axial direction of the sliding shaft 11, and the first sliding hole 211 is rotatable along the direction perpendicular to the axial direction of the sliding shaft 11. The cooperation between the first sliding hole 211 and the sliding shaft 11 can simultaneously achieve the sliding and rotation of the first pulley 21, with a simple structure and convenient processing.

[0047] Further, the second sliding part is the second sliding hole 221, the second sliding connection part is the sliding shaft 11 integrally formed with the first sliding connection part, and the second sliding hole 221 is slidable along the axial direction of the sliding shaft 11. Setting the sliding connection parts of the first pulley 21 and the second pulley 22 as the integrally formed sliding shaft 11 facilitates processing and the synchronous operation of the first pulley 21 and the second pulley 22.

[0048] It should be noted that the sliding shaft 11 includes a first sliding area and a second sliding area. The first pulley 21 is rotatably slidably arranged in the first sliding area, and the second pulley 22 slides in the second sliding area. In actual production design, the structures of the first pulley 21 and the second pulley 22 can be set to the same structure, which is convenient for processing and installation. Of course, since the second pulley 22 in this solution does not require a rotatable function, the first sliding area and the second sliding area can also be set to different structures. For example, the first sliding area is a circular shaft part, and the first sliding hole 211 can slide and rotate; the second sliding area is set to a shaft part with other regular or irregular shapes other than circular, and the shape of the second sliding hole 221 is adapted to the shape of the shaft part in the second sliding area, so that the second sliding hole 221 can slide but not rotate in the second sliding area.

[0049] In this embodiment, the first pulley 21 is further provided with a rotating part, and the pulley mounting bracket 10 is provided with a rotation braking part. The rotating part is used to connect with the rotation braking part after the first pulley 21 is screwed into the suspension rail mounting groove 102 to limit the rotation of the first pulley 21. The cooperation setting of the rotating part and the rotation braking part can achieve that after the first pulley 21 rotates to an angle at which it can slide into the suspension rail 101, the rotation stops, so as to facilitate further translation and sliding into the suspension rail 101.

[0050] Specifically, the rotating part is an arc-shaped groove 212, and the rotation braking part is a positioning shaft 12. The axial direction of the positioning shaft 12 is the same as the width direction of the pulley mounting bracket 10. After the first pulley 21 is screwed into the hanging rail mounting groove 102, the arc-shaped groove 212 can be slidably clamped on the positioning shaft 12 to limit the rotation of the first pulley 21. After the arc-shaped groove 212 is engaged with the positioning shaft 12, the rotation can be stopped. At the same time, since the positioning shaft 12 is a circular shaft piece adapted to the shape of the arc-shaped groove 212, the first pulley 21 can further slide on the positioning shaft 12 to facilitate sliding into the hanging rail 101. It should be noted that the rotating part of this solution is used to block the further rotation of the first pulley 21, and as long as it is adapted to the shape of the positioning shaft 12, its specific shape does not need to be limited.

[0051] Further, the second pulley 22 can also be slidably connected to the positioning shaft 12 to enhance the sliding stability.

[0052] Further, a limiting part 121 is provided on the positioning shaft 12 to limit the first pulley 21 to slide between one side of the pulley mounting bracket 10 and the first position of the pulley mounting bracket 10. The limiting part 121 can be a protrusion provided on the positioning shaft 12 to prevent the first pulley 21 from sliding beyond the sliding range.

[0053] See Figure 7 , the hanging wheel structure 2 further includes a positioning member 30. The positioning member 30 is provided between the first pulley 21 and the second pulley 22 to limit the first pulley 21 and the second pulley 22 from sliding along the width direction of the pulley mounting bracket 10 after the first pulley 21 and the second pulley 22 are respectively located in the corresponding hanging rails 101.

[0054] Specifically, the positioning member 30 includes a positioning part 31, a first engaging part 32 and a second engaging part 33. First engaging parts 201 are respectively provided at the upper ends of the first pulley 21 and the second pulley 22, and second engaging parts 202 are respectively provided at the lower ends of the first pulley 21 and the second pulley 22. The positioning part 31 is used to be inserted between the first pulley 21 and the second pulley 22 to limit the sliding of the first pulley 21 and the second pulley 22. The first engaging part 201 is inserted into the first engaging part 32, and the second engaging part 202 is inserted into the second engaging part 33 for positioning the positioning member 30.

[0055] The first engaging part 32 is a rigid positioning hook groove, the second engaging part 33 is an elastic positioning hook groove, and both the first engaging part 201 and the second engaging part 202 are positioning hook parts. After the first engaging part 201 is inserted into the first engaging part 32, the second engaging part 202 is then inserted onto the second engaging part 33 to fix the positioning member 30. The positioning member 30 is provided with a protruding ear seat towards the hanging rail 101 for carrying a dust removing member.

[0056] It should be noted that a first lug portion 213 is provided at the lower edge of the first pulley 21, and a second lug portion 222 is provided at the lower edge of the second pulley 22. The first lug portion 213 is used to move the first pulley 21 to slide or rotate, and the second lug portion 222 is used to move the second pulley 22 to slide.

[0057] Refer to Figure 8 , when the second pulley is slidably connected to the pulley mounting bracket 10, an example of the installation method of the hanging pulley structure 2 of this solution is as follows:

[0058] In the initial state, the pulley mounting bracket 10 is outside the hanging rail mounting groove 102. Rotate the first pulley 21 to be below the pulley mounting bracket 10 and slide it to one side, and slide the second pulley 22 to the second position to contact the first pulley 21;

[0059] Move the pulley mounting bracket 10 to below the notch of the hanging rail mounting groove 102. At this time, the combined width of the second pulley 22 and the pulley mounting bracket 10 is less than the notch width, and insert the pulley mounting bracket 10 into the hanging rail mounting groove 102 from bottom to top;

[0060] Slide the second pulley 22 to the other side of the pulley mounting bracket 10 to connect the second pulley 22 to the hanging rail 101. At the same time, slide the first pulley 21 to the first position to contact the first pulley 21. At this time, the first pulley 21 is below the notch of the hanging rail mounting groove 102;

[0061] Rotate the first pulley 21 into the hanging rail mounting groove 102, and then slide the first pulley 21 to the other side of the pulley mounting bracket 10 to connect the second pulley 22 to the hanging rail 101, and the installation of the hanging pulley structure 2 is completed.

[0062] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A hanging wheel structure, characterized in that: include: Pulley mounting bracket, A pulley block, wherein the pulley block is slidably connected to a hanging rail of the frame, and the hanging rail is arranged on both sides of a notch of a hanging rail installation slot on the frame; Wherein, the pulley group includes a first pulley and a second pulley, the width of the first pulley is smaller than the slot width of the hanging rail mounting groove, the first pulley is slidably connected to the pulley mounting frame along the width direction of the pulley mounting frame, and the first pulley is rotatably connected to the pulley mounting frame, and is used to make the first pulley rotate upward into or downward out of the hanging rail mounting groove along the slot of the hanging rail mounting groove within the sliding range of the first pulley; the second pulley is connected to the pulley mounting frame, and is used to be hung on the hanging rail before the first pulley is rotated into the hanging rail mounting groove.

2. The hanging wheel structure according to claim 1, characterized in that: The second pulley is fixedly connected to the pulley mounting frame, and is used to vertically or obliquely insert the second pulley and the pulley mounting frame into the hanging rail mounting groove from bottom to top before the first pulley is screwed into the hanging rail mounting groove, and the second pulley is hung on the hanging rail.

3. The hanging wheel structure according to claim 1, characterized in that: The second pulley is slidably connected to the pulley mounting frame along the width direction of the pulley mounting frame, and is used to vertically or obliquely insert the second pulley and the pulley mounting frame into the hanging rail mounting groove from bottom to top within the sliding range of the second pulley before the first pulley is screwed into the hanging rail mounting groove, and the second pulley is hung on the hanging rail.

4. The hanging wheel structure according to claim 3, characterized in that: The first pulley is provided with a first sliding portion, the pulley mounting frame is provided with a first sliding connection portion, and the first sliding portion is slidably connected to the first sliding connection portion along the width direction of the pulley mounting frame; the second pulley is provided with a second sliding portion, the pulley mounting frame is provided with a second sliding connection portion, and the second sliding portion is slidably connected to the second sliding connection portion along the width direction of the pulley mounting frame.

5. The hanging wheel structure according to claim 4, characterized in that: The first sliding portion is a first sliding hole, the first sliding connection portion is a sliding shaft, the first sliding hole is penetrated by the sliding shaft, the axial direction of the sliding shaft is in the same direction as the width direction of the pulley mounting frame, the first sliding hole can slide along the axial direction of the sliding shaft, and the first sliding hole can rotate along the axial direction perpendicular to the sliding shaft.

6. The hanging wheel structure according to claim 5, characterized in that: The second sliding portion is a second sliding hole, the second sliding connection portion is the sliding shaft integrally formed with the first sliding connection portion, and the second sliding hole is slidable along the axial direction of the sliding shaft.

7. The hanging wheel structure according to claim 1, characterized in that: The first pulley is also provided with a rotating part, and the pulley mounting frame is provided with a rotating brake part, and the rotating part is used to connect with the rotating brake part after the first pulley is screwed into the hanging rail mounting groove to limit the rotation of the first pulley.

8. The hanging wheel structure according to claim 7, characterized in that: The rotating part is an arc-shaped groove, and the rotating braking part is a positioning shaft, and the axial direction of the positioning shaft is in the same direction as the width direction of the pulley mounting frame; the arc-shaped groove can be slidably engaged on the positioning shaft after the first pulley is screwed into the hanging rail mounting groove, so as to limit the rotation of the first pulley.

9. The hanging wheel structure according to claim 1, characterized in that: The hanging wheel structure also includes a positioning member, which is arranged between the first pulley and the second pulley, and is used to limit the first pulley and the second pulley from sliding along the width direction of the pulley mounting frame after the first pulley and the second pulley are respectively located on the corresponding hanging rails.

10. The hanging wheel structure according to claim 9, characterized in that: The positioning member includes a positioning portion, a first clamping portion and a second clamping portion. The upper end of the first pulley and the upper end of the second pulley are respectively provided with a first clamping portion, and the lower end of the first pulley and the lower end of the second pulley are respectively provided with a second clamping portion. The positioning portion is used to be inserted between the first pulley and the second pulley to limit the sliding of the first pulley and the second pulley. The first clamping portion is inserted into the first clamping portion, and the second clamping portion is inserted into the second clamping portion for positioning the positioning member.

11. A door and window, characterized in that: It comprises a frame, a fan body and a hanging wheel structure as described in any one of claims 1 to 10, wherein the upper end of the hanging wheel structure is slidably connected to the hanging rail of the frame, and the lower end of the hanging wheel structure is connected to the fan body through a hanging box.

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