Hanging wheel mounting device and door and window thereof

Abstract

The utility model provides a hanging wheel installation device and a door and window thereof, the hanging wheel installation device comprises a pulley installation rack, a buffer, two groups of pulley blocks and a hanging box, the two groups of pulley blocks are respectively connected to two ends of the pulley installation rack and are connected to hanging rails of a frame body in a sliding manner, and the hanging rails are arranged on two sides of a notch of a hanging rail installation groove on the frame body; one end of the hanging box is connected with the fan body, and the other end of the hanging box is connected to the pulley installation frame and used for dispersing the weight of the fan body to the two pulley blocks. And the buffer is arranged in the pulley mounting frame and is used for buffering when the fan body slides. According to the scheme, the hanging box is mounted on the pulley mounting frame, so that the weight of the fan body can be dispersed to the two pulley blocks, the sliding friction force of the two pulley blocks is balanced, the two pulley blocks cannot tilt under the gravity condition, the sliding stability of the pulley blocks sliding on the hanging rail is improved, and the push-pull stability of the fan body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window hardware, in particular to a hanging wheel installation device. Background Art

[0002] The pulley cooperates with the slide rail fixed on the door frame to suspend the door leaf, thereby achieving the purpose of lateral movement of the door leaf. The existing hanging wheel installation device includes a load-bearing pulley block, a pulley mounting frame, an auxiliary pulley block and a hanging box, wherein the load-bearing pulley block and the auxiliary pulley block are respectively arranged at both ends of the pulley mounting frame, and the load-bearing pulley block and the auxiliary pulley block slide synchronously on the hanging rail, and the hanging box is installed on the load-bearing pulley block for connecting the fan body. Since the weight of the fan body connected to the hanging box is borne by the load-bearing pulley block, its sliding friction force is greater than that of the auxiliary pulley block, and the auxiliary pulley block is at the other end of the pulley mounting frame and is easy to tilt, which is not conducive to the stable sliding of the fan body. Utility Model Content

[0003] The utility model aims to provide a hanging wheel installation device to improve the sliding stability of a pulley block on a frame hanging rail.

[0004] The first aspect of the utility model provides a hanging wheel installation device, including a pulley mounting frame, two groups of pulley blocks and a hanging box, the two groups of pulley blocks are respectively connected to the two ends of the pulley mounting frame, and are slidably connected to the hanging rail of the frame, and the hanging rail is arranged on both sides of the slot of the hanging rail mounting slot on the frame; one end of the hanging box is connected to the fan body, and the other end of the hanging box is connected to the pulley mounting frame, and the installation position of the hanging box deviates from the installation position of the pulley block, which is used to distribute the weight of the fan body to the two groups of pulley blocks.

[0005] Optionally, the distance between the hanging box and one group of the pulley blocks is smaller than the distance between the hanging box and another group of the pulley blocks.

[0006] Optionally, the pulley group includes a first pulley and a second pulley, the width of the first pulley is smaller than the width of the slot of the hanging rail mounting slot, 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 slot along the slot of the hanging rail mounting slot 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 slot.

[0007] Optionally, the second pulley is fixedly connected to the pulley mounting frame, and before the first pulley is screwed into the hanging rail mounting groove, the second pulley and the pulley mounting frame are vertically or obliquely inserted into the hanging rail mounting groove from bottom to top, and the second pulley is hung on the hanging rail.

[0008] Optionally, 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.

[0009] Optionally, 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.

[0010] 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 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; 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 can slide along the axial direction of the sliding shaft.

[0011] Optionally, the first pulley is further 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.

[0012] Optionally, 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.

[0013] Optionally, 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 in the corresponding hanging rails.

[0014] The second aspect of the utility model provides a door and window, comprising a frame, a fan body and the above-mentioned hanging wheel installation device, the pulley block is slidably connected to the hanging rail of the frame, and the hanging box is connected to the fan body.

[0015] The beneficial effects of this solution are:

[0016] In this solution, the hanging box is installed on the pulley mounting frame, so that the weight of the fan body can be distributed to the two sets of pulley blocks. The sliding friction of the two sets of pulley blocks is balanced, and the two sets of pulley blocks will not tilt up under the influence of gravity, thereby improving the sliding stability of the pulley blocks sliding on the hanging rails, that is, increasing the push-pull stability of the fan body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the partial structure of the hanging rail sliding door and window;

[0018] Figure 2 A schematic diagram of the partial structure of the hanging rail sliding door and window without the positioning parts;

[0019] Figure 3 It is a structural schematic diagram of the hanging wheel installation device of the utility model;

[0020] Figure 4 is a schematic diagram of the connection structure between the first pulley and the pulley mounting frame;

[0021] Figure 5 is a schematic diagram of the connection structure between the second pulley and the pulley mounting frame;

[0022] Figure 6 is a structural schematic diagram of the first pulley;

[0023] Figure 7 is a schematic diagram of the structure of the second pulley;

[0024] Figure 8 is a schematic diagram of the structure of the positioning member;

[0025] Fig. 9 Schematic diagram of the installation process for installing the hanging wheel mounting device onto the hanging rail.

[0026] Description of Figure Numbers:

[0027] 1. Frame; 101. Hanging rail; 102. Hanging rail mounting groove; 2. Fan body; 3. Hanging wheel mounting device;

[0028] 10. Pulley mounting frame; 11. Sliding shaft; 12. Positioning shaft; 121. Limiting part; 13. Hanging box mounting seat;

[0029] 20, pulley block; 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;

[0030] 30. Positioning member; 31. Positioning portion; 32. First snap-in portion; 33. Second snap-in portion;

[0031] 40. Buffer;

[0032] 50. Hanging box. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] In the description of the present utility model, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and 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 cannot be understood as a limitation on the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, or it can be a communication between the two components. For ordinary technicians in this field, the specific meanings of the terms in the present utility model can be understood according to specific circumstances.

[0035] See also Figure 1-2 The present invention discloses a door and window, which is a hanging rail sliding door and window, comprising a frame 1, a fan body 2 and a hanging wheel mounting device 3, wherein the upper end of the hanging wheel mounting device 3 is slidably connected to the hanging rail 101 of the frame 1, and the lower end of the hanging wheel mounting device 3 is connected to the fan body 2.

[0036] Specifically, see Figure 3-8 The hanging wheel installation device 3 includes a pulley installation frame 10, a buffer 40, two pulley blocks 20 and a hanging box 50. The two pulley blocks 20 are respectively connected to the two ends of the pulley installation frame 10 and are slidably connected to the hanging rail 101 of the frame 1. The hanging rail 101 is arranged on both sides of the notch of the hanging rail installation groove 102 on the frame; one end of the hanging box 50 is connected to the fan body 2, and the other end of the hanging box 50 is connected to the pulley installation frame 10. The installation position of the hanging box 50 deviates from the installation position of the pulley block 20, and is used to distribute the weight of the fan body 2 to the two pulley blocks 20. The buffer 40 is arranged in the pulley installation frame 10, and is used to buffer when the fan body 2 slides.

[0037] In this solution, the hanging box 50 is installed on the pulley mounting frame 10, so that the weight of the fan body 2 can be distributed to the two sets of pulley blocks 20, and the sliding friction of the two sets of pulley blocks 20 is balanced. The two sets of pulley blocks 20 will not tilt up when subjected to gravity, thereby improving the sliding stability of the pulley blocks 20 sliding on the hanging rail 101, that is, increasing the push-pull stability of the fan body 2.

[0038] It can be understood that the pulley mounting frame 10 is provided with a hanging box mounting seat 13 for installing the hanging box, the hanging box mounting seat 13 is provided with an internally threaded mounting hole, the hanging box is provided with an externally threaded hanging rod, and the hanging rod is threadedly connected to the mounting hole to achieve the connection between the pulley mounting frame 10 and the fan body 2.

[0039] In this embodiment, the distance between the hanging box 50 and one group of pulley blocks 20 is smaller than the distance between the hanging box 50 and another group of pulley blocks 20 .

[0040] It should be noted that since the pulley mounting frame 10 is relatively long, if the hanging box 50 is installed in the middle position of the pulley mounting frame 10, it is easy to cause it to bend. Therefore, the present solution sets the hanging box 50 at a position close to a group of pulley blocks 20, that is, one group of pulley blocks is a load-bearing pulley block, and the other group of pulley blocks is an auxiliary pulley block. The load-bearing pulley block mainly bears the weight of the fan body, and the auxiliary pulley block also bears the weight of the fan body, which can not only disperse the gravity, but also avoid the possibility of the auxiliary pulley block tilting, thereby improving the sliding stability of the pulley block on the hanging rail.

[0041] The pulley group 20 includes a first pulley 21 and a second pulley 22. The width d1 of the first pulley 21 is smaller than the slot width D of the hanging rail mounting groove 102. The first pulley 21 can be slidably connected to the pulley mounting frame 10 along the width direction of the pulley mounting frame 10, and the first pulley 21 can be rotatably connected to the pulley mounting frame 10. The first pulley 21 slides in a sliding range between one side of the pulley mounting frame 10 and the first position of the pulley mounting frame 10. In the sliding range of the first pulley 21, the first pulley 21 can rotate the first slide rail pulley upward into or downward out of the hanging rail mounting groove 102 along the slot of the hanging rail mounting groove 102.

[0042] The second pulley 22 is fixedly mounted on the pulley mounting frame 10 or slidably connected to the pulley mounting frame 10 .

[0043] When the second pulley 22 is fixedly connected to the pulley mounting frame 10, before the first pulley 21 is screwed into the hanging rail mounting groove 102, the second pulley 22 and the pulley mounting frame 10 are vertically or obliquely inserted into the hanging rail mounting groove 102 from bottom to top, and the first pulley 21 is hung on the hanging rail 101.

[0044] When the second pulley 22 is slidably connected to the pulley mounting frame 10, the second pulley 22 is slidably connected to the pulley mounting frame 10 along the width direction of the pulley mounting frame 10, and the second pulley 22 slides in the sliding range between the other side of the pulley mounting frame 10 and the second position of the pulley mounting frame 10. Before the first pulley 21 is screwed into the hanging rail mounting groove 102, the second pulley 22 can be vertically or obliquely inserted into the hanging rail mounting groove 102 from bottom to top with the pulley mounting frame 10 within the sliding range, and the first pulley 21 is slidably connected to the hanging rail 101.

[0045] If the second pulley 22 and the pulley mounting frame 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 frame 10 is smaller than the slot width D of the hanging rail mounting groove.

[0046] It should be noted that the first pulley 21 and the second pulley 22 in this solution need to be arranged in parallel on the pulley mounting frame 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 frame 10, and the second pulley 22 is on the other side of the pulley mounting frame 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 frame 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 frame 10. It can be understood that the first position and the second position are the sliding limit positions of the first pulley 21 and the second pulley 22, respectively, and the first pulley 21 and the second pulley 22 can be inserted into the hanging rail mounting groove 102 without being at the limit position.

[0047] The hanging wheel structure 2 of the present solution installs the first pulley 21 in the pulley block 20 on the pulley mounting frame 10 in a slidable and rotatable manner, and installs the second pulley 22 on the pulley mounting frame 10 in a slidable manner. By adjusting the relative position between the first pulley 21 and the second pulley 22, the first pulley 21 and the pulley mounting frame 10 are first inserted 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 the second pulley 22 is screwed into the hanging rail mounting groove 102 and hung on the other side of the hanging rail 101, so as to insert the hanging wheel structure 2 from the bottom to the top through the notch of the hanging rail mounting groove 102 into the hanging rail mounting groove 102. This hanging wheel structure 2 does not need to be inserted from both sides of the top side profile of the frame 1, which simplifies the installation of the hanging wheel structure 2 and the entire window, and can improve processing efficiency.

[0048] In this embodiment, the first pulley 21 is provided with a first sliding portion, the pulley mounting frame 10 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 10; the second pulley 22 is provided with a second sliding portion, the pulley mounting frame 10 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 10. It can be understood that the first sliding connection portion can drive the first sliding portion to slide from one side of the pulley mounting frame 10 to the first position of the pulley mounting frame 10. The second sliding connection portion can drive the second sliding portion to slide from the other side of the pulley mounting frame 10 to the second position of the pulley mounting frame 10.

[0049] Specifically, the first sliding portion is the first sliding hole 211, the first sliding connection portion is the sliding shaft 11, the first sliding hole 211 is penetrated by the sliding shaft 11, the axial direction of the sliding shaft 11 is in the same direction as the width direction of the pulley mounting frame 10, the first sliding hole 211 can slide along the axial direction of the sliding shaft 11, and the first sliding hole 211 can rotate along the axial direction perpendicular to the sliding shaft 11. The cooperation between the first sliding hole 211 and the sliding shaft 11 can realize the sliding and rotation of the first pulley 21 at the same time, and the structure is simple and the processing is convenient.

[0050] Further, the second sliding portion is a second sliding hole 221, the second sliding connection portion is a sliding shaft 11 integrally formed with the first sliding connection portion, and the second sliding hole 221 is slidable along the axial direction of the sliding shaft 11. The sliding connection portion between the first pulley 21 and the second pulley 22 is set as an integrally formed sliding shaft 11, which facilitates processing and synchronous operation of the first pulley 21 and the second pulley 22.

[0051] 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 and slidingly 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 to facilitate processing and installation. Of course, since the second pulley 22 in this solution does not need a rotatable function, the first sliding area and the second sliding area can also be set to different structures, such as the first sliding area is a circular shaft, and the first sliding hole 211 can slide and rotate; the second sliding area is set to a regular or irregular shape shaft other than a circle, and the shape of the second sliding hole 221 is adapted to the shape of the shaft of the second sliding area, so that the second sliding hole 221 can slide but not rotate in the second sliding area.

[0052] In this embodiment, the first pulley 21 is further provided with a rotating part, and the pulley mounting frame 10 is provided with a rotating brake part, and the rotating part is used to connect with the rotating brake part after the first pulley 21 is screwed into the hanging rail mounting groove 102, so as to limit the rotation of the first pulley 21. The cooperative arrangement of the rotating part and the rotating brake part can realize that after the first pulley 21 rotates to an angle that allows it to slide into the hanging rail 101, it stops rotating, so as to facilitate further translation and sliding into the hanging rail 101.

[0053] Specifically, the rotating part is an arc-shaped groove 212, and the rotating brake part is a positioning shaft 12. The axial direction of the positioning shaft 12 is in the same direction as the width direction of the pulley mounting frame 10; the arc-shaped groove 212 can be slidably connected to the positioning shaft 12 after the first pulley 21 is screwed into the hanging rail mounting groove 102, so as to limit the rotation of the first pulley 21. After the arc-shaped groove 212 is connected to the positioning shaft 12, the rotation can be stopped. At the same time, since the positioning shaft 12 is a circular shaft member that matches the shape of the arc-shaped groove 212, the first pulley 21 can further slide on the positioning shaft 12, so as to slide into the hanging rail 101. It should be noted that the rotating part of this scheme is used to prevent the first pulley 21 from rotating further. As long as the positioning shaft 12 can prevent the rotating part from rotating further, its specific shape does not need to be limited.

[0054] Furthermore, the second pulley 22 may also be slidably connected to the positioning shaft 12 to enhance sliding stability.

[0055] Furthermore, a limiting portion 121 is provided on the positioning shaft 12 to limit the first pulley 21 from sliding between one side of the pulley mounting frame 10 and the first position of the pulley mounting frame 10. The limiting portion 121 can be a protrusion provided on the positioning shaft 12 to prevent the first pulley 21 from sliding beyond the sliding range.

[0056] See also Figure 8 The hanging wheel installation device 3 also includes a positioning member 30, which is arranged between the first pulley 21 and the second pulley 22, and is used to limit the first pulley 21 and the second pulley 22 from sliding along the width direction of the pulley mounting frame 10 after the first pulley 21 and the second pulley 22 are respectively located in the corresponding hanging rails 101.

[0057] Specifically, the positioning member 30 includes a positioning portion 31, a first clip-in portion 32 and a second clip-in portion 33. The upper ends of the first pulley 21 and the second pulley 22 are respectively provided with a first clip-in portion 201, and the lower ends of the first pulley 21 and the second pulley 22 are respectively provided with a second clip-in portion 202. The positioning portion 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 clip-in portion 201 is inserted into the first clip-in portion 32, and the second clip-in portion 202 is inserted into the second clip-in portion 33, which are used to position the positioning member 30.

[0058] The first snap-in portion 32 is a rigid positioning hook groove, the second snap-in portion 33 is an elastic positioning hook groove, the first snap-in portion 201 and the second snap-in portion 202 are both positioning hook portions, after the first snap-in portion 201 is inserted into the first snap-in portion 32, the second snap-in portion 202 is inserted into the second snap-in portion 33 to fix the positioning member 30; the positioning member 30 is provided with a protruding ear seat toward the hanging rail 101 for carrying the dust removal member.

[0059] It should be noted that a first lug 213 is provided at the lower edge of the first pulley 21, and a second lug 222 is provided at the lower edge of the second pulley 22. The first lug 213 is used to drive the first pulley 21 to slide or rotate, and the second lug 222 is used to drive the second pulley 22 to slide.

[0060] See also Fig. 9 The installation method of the hanging wheel installation device 3 of this scheme is as follows:

[0061] In the initial state, the pulley mounting frame 10 is outside the hanging rail mounting groove 102, the first pulley 21 is rotated to be below the pulley mounting frame 10 and slides to one side, and the second pulley 22 is slid to the second position to contact the first pulley 21;

[0062] Move the pulley mounting frame 10 to the bottom of the slot of the hanging rail mounting groove 102. At this time, the combined width of the second pulley 22 and the pulley mounting frame 10 is smaller than the slot width. Insert the pulley mounting frame 10 into the hanging rail mounting groove 102 from bottom to top.

[0063] Slide the second pulley 22 to the other side of the pulley mounting frame 10 so that the second pulley 22 is connected to the hanging rail 101, and 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 under the notch of the hanging rail mounting groove 102;

[0064] The first pulley 21 is rotated to enter the hanging rail installation groove 102, and then the first pulley 21 is slid to the other side of the pulley mounting frame 10, so that the second pulley 22 is connected to the hanging rail 101, and the installation of the hanging wheel installation device 3 is completed.

[0065] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A hanging wheel installation device, characterized in that: include: Pulley mounting bracket, Two groups of pulley blocks, the two groups of pulley blocks are respectively connected to the two ends of the pulley mounting frame, and are slidably connected to the hanging rails of the frame, and the hanging rails are arranged on both sides of the notches of the hanging rail mounting grooves on the frame; A hanging box, one end of which is connected to the fan body, and the other end of which is connected to the pulley mounting frame. The installation position of the hanging box deviates from the installation position of the pulley block, and is used to distribute the weight of the fan body to the two pulley blocks.

2. The hanging wheel installation device according to claim 1, characterized in that: The distance between the hanging box and one group of the pulley blocks is smaller than the distance between the hanging box and another group of the pulley blocks.

3. The hanging wheel installation device according to claim 1, characterized in that: 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.

4. The hanging wheel installation device according to claim 3, 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.

5. The hanging wheel installation device according to claim 3, 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.

6. The hanging wheel installation device according to claim 5, 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.

7. The hanging wheel installation device according to claim 6, 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; 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 can slide along the axial direction of the sliding shaft.

8. The hanging wheel installation device according to claim 3, 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.

9. The hanging wheel installation device according to claim 8, 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.

10. The hanging wheel installation device according to claim 3, characterized in that: The hanging wheel installation device 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.

11. A door and window, characterized in that: It comprises a frame, a fan body and a hanging wheel installation device as described in any one of claims 1 to 10, wherein the pulley block is slidably connected to the hanging rail of the frame, and the hanging box is connected to the fan body.

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