Pulley mechanism for sliding doors and windows

Abstract

The present application relates to a pulley mechanism for sliding doors and windows, comprising a housing, a clamping frame, a guide frame, a pulley assembly, and an adjustment assembly. The clamping frame and the guide frame are provided with matching clamping guide structures. The pulley assembly, the housing, and the guide frame are provided with matching height adjustment guide structures. The adjustment assembly is connected to the housing and the clamping frame. When the adjustment assembly is positively adjusted, the clamping frame moves toward its first end gradually approaching the first end of the housing, while the clamping guide structure guides the clamping frame to produce a downward displacement to abut against a notch below the door and window sash. When the adjustment assembly is positively adjusted, the housing also moves toward its first end gradually approaching the first end of the clamping frame, while the height adjustment guide structure guides the pulley assembly to produce a downward displacement to adjust the height of the pulley exposed above the lower end of the housing. The pulley mechanism achieves clamping installation with the door and window sash and pulley height adjustment through positive adjustment of an adjustment assembly.

Description

Technical Field

[0001] The present application relates to sliding doors and windows, and more particularly to a pulley mechanism for sliding doors and windows. Background Art

[0002] With the popularization of the concept of green building, users have higher and higher requirements for the convenience and stability of door and window hardware installation. In particular, the frames of doors and windows are getting narrower and narrower. Conventional self-tapping screw installation (which will hit the glass) can no longer meet user needs. The existing narrow-frame sliding doors and windows on the market adopt a fixing method in which the pulley mechanism is clamped in the groove below the door and window fan body through a clamping plate. The clamping plate needs to be tightened from the bottom of the pulley mechanism upward with a screw, and then the pulley height of the pulley mechanism is adjusted by an additional adjustment screw. The clamping of the clamping plate is only achieved by the pre-tightening force of the screw, and it is easy to loosen due to long-term vibration. Moreover, because the clamping plate needs to be tightened from the bottom of the pulley mechanism upward, during installation, it is necessary to first install the pulley mechanism into the groove below the fan body and clamp it with the clamping plate, then hang the fan, and then debug the pulley height of the pulley mechanism, which is cumbersome to operate. Summary of the Invention

[0003] The technical problem to be solved by the present application is to provide a pulley mechanism for sliding doors and windows that can complete the clamping and height adjustment of the pulley mechanism through one adjustment in response to the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present application to solve its technical problem is: a pulley mechanism for sliding doors and windows, a shell, a clamping frame, a guide frame, a pulley assembly and an adjustment assembly are proposed, wherein: the clamping frame is installed in the shell, and there is a gap between the first end of the pulley of the clamping frame in the rolling direction and the corresponding first end of the shell, the guide frame is installed in the shell, and the guide frame has a top that is higher than the upper end of the shell; the clamping frame and the guide frame are provided with a matching clamping guide structure, and the clamping guide structure guides the clamping frame to produce a downward displacement when the clamping frame moves relative to the shell in the direction of making the first end of the clamping frame close to the first end of the shell; the pulley assembly is installed in the shell, and the pulley assembly has at least one pulley that cooperates with the lower rail; the pulley assembly, the shell and the guide frame are provided with a matching and a control panel having the first control panel and the second control panel having the first control panel and the second control panel respectively control the adjustment panel to adjust the position of the adjustment panel and the adjustment panel when the adjustment panel is in a state of being rotated.

[0005] According to one embodiment of the pulley mechanism of the sliding door and window described in the present application, when the pulley mechanism is installed between the bottom of the door and window sash and the lower rail, the top of the guide frame abuts the upper end of the slot below the door and window sash, and the pulley is supported on the lower rail. The positive adjustment of the adjustment component first causes the clamping frame to move toward its first end gradually approaching the first end of the shell while guiding the clamping frame to produce a downward displacement through the clamping guide structure until the clamping frame abuts against the slot below the door and window sash and is prevented from moving, thereby causing the shell to move toward its first end gradually approaching the first end of the clamping frame while guiding the pulley assembly to produce a downward displacement relative to the shell and the guide frame through the height adjustment guide structure until the pulley is exposed to the maximum height of the lower end of the shell.

[0006] According to one embodiment of the pulley mechanism of the sliding door and window described in the present application, the adjustment assembly includes an adjusting screw and an adjusting nut, the adjusting nut is clamped on the first end of the clamping frame, the adjusting screw passes through the first end of the outer shell and is threadedly connected to the adjusting nut, and when the adjusting screw is rotated, the outer shell and the clamping frame are driven to move relative to each other.

[0007] According to one embodiment of the pulley mechanism of the sliding door and window described in the present application, the clamping guide structure includes a clamping guide groove extending obliquely relative to the horizontal direction and a first vertical guide groove correspondingly opened on the guide frame and extending vertically, and the clamping frame is provided with a clamping member which is simultaneously passed through the clamping guide groove and the first vertical guide groove through a clamping guide shaft so as to move up and down with the horizontal movement of the clamping frame; when the adjusting assembly is positively adjusted to make the clamping frame move horizontally toward its first end gradually approaching the first end of the shell, the clamping member moves downward under the guidance of the clamping guide shaft moving along the clamping guide groove and the first vertical guide groove until the overlapping edge of the clamping member abuts the lower end of the notch.

[0008] According to one embodiment of the pulley mechanism for sliding doors and windows described in the present application, the clamping frame and the housing are provided with a first horizontal movement guide structure that cooperates to guide the clamping frame and the housing to generate relative movement in the horizontal direction.

[0009] According to one embodiment of the pulley mechanism of the sliding door and window described in the present application, the clamping guide structure includes a clamping guide groove and a clamping guide shaft respectively provided on the clamping frame and the guide frame, the clamping guide shaft being passed through the clamping guide groove; when the adjustment assembly is adjusted in the positive direction, the clamping frame moves in an inclined direction toward the first end of the shell gradually approaching its first end under the guidance of the clamping guide shaft moving along the clamping guide groove, and at the same time generates a downward displacement until the overlapping edge provided on the clamping frame abuts the lower end of the notch.

[0010] According to one embodiment of the pulley mechanism of the sliding door and window described in the present application, the height adjustment guide structure includes a height adjustment guide groove and a height adjustment guide shaft extending obliquely relative to the horizontal direction, which are respectively arranged on the pulley assembly and the outer shell, and a second vertical guide groove extending vertically correspondingly opened on the guide frame, and the height adjustment guide shaft is simultaneously passed through the height adjustment guide groove and the second vertical guide groove; when the adjustment assembly is positively adjusted to move the outer shell toward the direction in which its first end gradually approaches the first end of the clamping frame, the pulley assembly moves downward under the guidance of the height adjustment guide shaft moving along the height adjustment guide groove and the second vertical guide groove.

[0011] According to one embodiment of the pulley mechanism of the sliding door and window described in the present application, the height adjustment guide structure includes a height adjustment guide groove and a first height adjustment guide shaft extending obliquely relative to the horizontal direction, which are separately arranged on the pulley assembly and the outer shell, and a second vertical guide groove and a second height adjustment guide shaft extending vertically, which are separately arranged on the guide frame and the pulley assembly. The first height adjustment guide shaft passes through the height adjustment guide groove, and the second height adjustment guide shaft passes through the second vertical guide groove; when the adjustment assembly is positively adjusted to make the outer shell move toward the direction in which its first end gradually approaches the first end of the clamping frame, the pulley assembly moves downward under the guidance of the first height adjustment guide shaft moving along the height adjustment guide groove and the second height adjustment guide shaft moving along the second vertical guide groove.

[0012] According to one embodiment of the pulley mechanism of the sliding door and window described in the present application, the pulley assembly includes a pulley mounting frame and two pulleys rotatably mounted at both ends of the pulley mounting frame, and the pulley mounting frame and the outer shell are provided with a matching height adjustment guide structure.

[0013] According to one embodiment of the pulley mechanism of the sliding door and window described in the present application, the pulley mechanism is provided with at least two pulley assemblies arranged in a horizontal direction.

[0014] The pulley mechanism of the sliding door and window implemented in the present application has the following beneficial effects: the pulley mechanism of the sliding door and window according to the embodiment of the present application can realize the clamping installation of the pulley mechanism and the door and window fan body and adjust the pulley height through the positive adjustment of an adjustment component, so that the pulley mechanism and the fan body are clamped stably and will not loosen; moreover, the pulley mechanism can realize the function of first hanging the fan body, then installing the pulley mechanism into the slot below the fan body, then clamping the pulley mechanism into the slot, and then adjusting the pulley height, making the installation operation of the door and window easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0016] Figure 1 This is a schematic diagram of the overall structure of the pulley mechanism of the sliding door and window of the first embodiment of the present application;

[0017] Figure 2 yes Figure 1 The overall structural diagram of the pulley mechanism from another angle is shown;

[0018] Figure 3 yes Figure 1 Schematic diagram of the exploded structure of the pulley mechanism shown;

[0019] Figure 4 yes Figure 2 A partial enlarged view of

[0020] Figure 5 is a top view of the clamping frame in the first embodiment of the present application;

[0021] Figure 6 is a schematic structural diagram of the clamping member in the first embodiment of the present application;

[0022] Figure 7 is a schematic diagram of the exploded structure of the pulley assembly in the first embodiment of the present application;

[0023] Figure 8 yes Figure 1 The structure diagram of the pulley mechanism shown is in the initial state when it is installed below the door and window fan body;

[0024] Figure 9 yes Figure 8 The pulley mechanism shown is in an initial state and is in coordination with the fan body;

[0025] Figure 10 yes Figure 8 A schematic structural diagram of a second state in which the pulley mechanism is clamped in the notch below the fan body;

[0026] Figure 11 yes Figure 10 The structure diagram of the pulley mechanism shown is in the second state and cooperates with the fan body;

[0027] Figure 12 yes Figure 10 A schematic structural diagram of the pulley mechanism in the third state of adjusting the pulley height is shown;

[0028] Figure 13 yes Figure 12 The structure diagram of the pulley mechanism shown is in the third state and cooperates with the fan body;

[0029] Figure 14 yes Figure 12 The structure diagram of the pulley mechanism shown continues to adjust the pulley height to the highest state;

[0030] Figure 15 yes Figure 14 The pulley mechanism shown is in the highest state and is coordinated with the fan body;

[0031] Figure 16 This is a schematic structural diagram of the initial state of the pulley mechanism of the sliding door and window of the second embodiment of the present application installed below the door and window fan body;

[0032] Figure 17 yes Figure 16 A schematic structural diagram of a second state in which the pulley mechanism is clamped in the notch below the fan body;

[0033] Figure 18 yes Figure 17 The structure diagram of the pulley mechanism shown is to adjust the pulley height to the highest state. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely intended to explain this application and are not intended to limit this application. Furthermore, the embodiments and features of the embodiments in this application may be combined with each other unless there is a conflict.

[0035] Figure 1 FIG. 1 shows a schematic diagram of the overall structure of a pulley mechanism 100 for a sliding door and window according to the first embodiment of the present application. Figure 1 As shown, the pulley mechanism 100 is mainly composed of a housing 10, a clamping frame 20, clamping members 30a and 30b, a guide frame 40, a pulley assembly 50, and an adjustment assembly 60. The clamping frame 20 is installed in the housing 10, and a certain distance is between the first end of the clamping frame 20 in the rolling direction of the pulley and the corresponding first end of the housing 10. The guide frame 40 is installed in the housing 10, and the guide frame 40 has a top that is higher than the upper end of the housing 10. The clamping frame 20 and the guide frame 40 are provided with a matching clamping guide structure to guide the clamping members 30a and 30b provided on the clamping frame 20 to produce a downward displacement with the horizontal movement of the clamping frame 20 when the clamping frame 20 moves horizontally relative to the housing 10 so that the first end of the clamping frame 20 approaches the first end of the housing 10. The pulley assembly 50 is installed in the housing 10. The pulley assembly 50, the housing 10, and the guide frame 40 are equipped with a height adjustment guide structure that cooperates. This structure guides the pulley assembly 50 to move downward relative to the housing 10 and the guide frame 40 when the housing 10 moves horizontally relative to the clamping frame 20 in a direction that brings the first end of the housing 10 closer to the first end of the clamping frame 20. The adjustment assembly 60 is connected to the housing 10 and the clamping frame 20, respectively, to adjust the relative horizontal positions of the housing 10 and the clamping frame 20. When the adjustment assembly 60 is adjusted in a positive direction, the clamping frame 20 moves horizontally toward the first end of the housing 10, while simultaneously guiding the clamping members 30a and 30b to move downward through the clamping guide structure to abut against the notch 201 below the door or window sash. When the adjustment assembly 60 is adjusted in the positive direction, the housing 10 is moved in a horizontal direction toward the first end of the clamping frame 20, and at the same time, the pulley assembly 50 is guided by the height adjustment guide structure to produce a downward displacement relative to the housing 10 and the guide frame 40 to adjust the height of the pulleys 52a and 52b exposed from the lower end of the housing 10.

[0036] See Figure 3As shown, the housing 10 is formed by splicing a rear housing 11 and a front housing 12. The rear housing 11 has a rear side wall 111 extending in the horizontal direction. The first end of the rear side wall 111 in the horizontal direction (i.e. Figure 3 The left end of the rear side wall 111 is formed toward the front shell 12 to form a first bending wall 112, and a first through hole 113 is provided in the middle of the first bending wall 112. Figure 3 The right end in the middle of the front shell 12 forms a second bent wall 114 toward the front shell 12, and a splicing groove 115 is formed on the outer side of the second bent wall 114 away from the rear side wall 111. The front shell 12 has a front side wall 121 extending in the horizontal direction. The first end of the front side wall 121 in the horizontal direction forms a third bent wall 122 toward the rear shell 11, and a second through hole 123 is formed in the middle of the third bent wall 122. The second end of the front side wall 121 in the horizontal direction, which is opposite to the first end, forms a fourth bent wall 124 toward the rear shell 11, and a splicing protrusion 125 (see FIG. 1 ) that matches the shape of the splicing groove 115 is formed on the outer side of the fourth bent wall 124 away from the front side wall 121. Figure 2 As shown). When the splicing protrusion 125 on the fourth bending wall 124 of the front shell 12 is inserted into the splicing groove 115 of the second bending wall 114 of the rear shell 11, the third bending wall 122 of the front shell 12 and the first bending wall 112 of the rear shell 11 are staggered and abutted against each other in the horizontal direction, and the second through hole 123 is coaxially aligned with the first through hole 113, thereby splicing to form the upper and lower open shell 10. Figure 3 As shown, first avoidance grooves 116 and 126 are correspondingly provided at the middle of the lower ends of the rear side wall 111 of the rear shell 11 and the front side wall 121 of the front shell 12, and two second avoidance grooves 119a, 119b and 129a, 129b are symmetrically provided at the upper ends. The rear side wall 111 and the front side wall 121 also respectively have two first mounting holes 117a, 117b and 127a, 127b at positions away from the two second avoidance grooves 119a, 119b and 129a, 129b towards the two ends. The two first mounting holes 117a, 117b and 127a, 127b can be vertically staggered near the upper and lower ends of the rear side wall 111 and the front side wall 121, respectively. In addition, the rear side wall 111 and the front side wall 121 are respectively defined with two groups of four second mounting holes 118a, 118b, 118c, 118d and 128a, 128b, 128c, 128d above the first avoiding grooves 116 and 126.

[0037] The clamping frame 20 is installed in the housing 10 in a manner that it can move relative to the housing 10 in the horizontal direction. Figure 3 and Figure 5As shown, the clamping frame 20 is composed of a first clamping plate 21a, a second clamping plate 21b, and a clamping connecting plate 22. The first clamping plate 21a and the second clamping plate 21b are symmetrically spaced apart from each other in the front and rear directions. The clamping connecting plate 22 is connected to the corresponding first ends of the first clamping plate 21a and the second clamping plate 21b in the horizontal direction. The clamping connecting plate 22 has a third through hole 23 coaxially aligned with the first through hole 113 and the second through hole 123 of the housing 10. The first clamping plate 21a and the second clamping plate 21b have the same structure and are symmetrically arranged in the front and rear directions. Each has a first wall 211, a second wall 212, a third wall 213, a fourth wall 214, and a fifth wall 215 connected in sequence from the first end to the second end. The third wall 213 and the front and rear side walls 111 and 121 of the housing 10 are coplanar, the second wall 212 and the fourth wall 214 are coplanar and offset inward relative to the third wall 213, and the first wall 211 and the fifth wall 215 are coplanar and offset outward relative to the second wall 212 and the fourth wall 214. When the clamping frame 20 is installed in the housing 10, the third wall 213 is positioned within the first avoidance grooves 116 and 126 at the lower ends of the front and rear side walls 111 and 121 of the housing 10, the second wall 212 and the fourth wall 214 have gaps with the front and rear side walls 111 and 121 of the housing 10, and the first wall 211 and the fifth wall 215 are close to the front and rear side walls 111 and 121 of the housing 10. Furthermore, the first wall 211 and the fifth wall 215 of the first clamping plate 21a and the second clamping plate 21b are respectively provided with first horizontal guide grooves 216a and 216b extending in the horizontal direction. The two first horizontal guide grooves 216a and 216b are also vertically staggered corresponding to the first mounting holes 117a, 117b and 127a, 127b on the housing 10. The two horizontal guide shafts 71a and 71b pass through the first horizontal guide grooves 216a and 216b on the front and rear sides of the clamping frame 20 and are then installed in the corresponding first mounting holes 117a, 127a and 117b, 127b on the front and rear sides of the housing 10, thereby forming a horizontal guide structure that guides the horizontal movement of the clamping frame 20 and the housing 10, thereby enabling the clamping frame 20 to move horizontally relative to the housing 10. The second wall 212 and the fourth wall 214 of the first clamping plate 21a and the second clamping plate 21b are also respectively provided with clamping guide grooves 217a and 217b extending obliquely relative to the horizontal direction. The clamping members 30a and 30b are respectively installed in the clamping guide grooves 217a and 217b on the front and rear sides of the clamping frame 20 through the two ends of the clamping guide shafts 72a and 72b, so as to move up and down with the horizontal movement of the clamping frame 20 under the joint guidance of the first vertical guide grooves 414a and 414b of the guide frame 40.The clamping guide grooves 217a and 217b, the first vertical guide grooves 414a and 414b, and the clamping guide shafts 72a and 72b together constitute a clamping guide structure. As the clamping frame 20 moves horizontally toward its first end gradually approaching the first end of the housing 10 under the guidance of the first guide shafts 71a and 71b moving along the first horizontal guide grooves 216a and 216b, the clamping frame 20 acts on the clamping guide shafts 72a and 72b through the clamping guide grooves 217a and 217b, causing the clamping members 30a and 30b to move downward under the guidance of the clamping guide shafts 72a and 72b moving along the clamping guide grooves 217a and 217b and the first vertical guide grooves 414a and 414b. For details, see. Figure 6 In the illustrated embodiment, each clamping member 30a, 30b includes a first side wall 31 and a second side wall 32 disposed front and rear, and a connecting wall 33 connected to the bottoms of the first and second side walls 31, 32. The first and second side walls 31, 32 are provided with coaxially aligned first and second clamping holes 34, 35, respectively. The ends of the clamping guide shafts 72a, 72b, after passing through the first and second clamping holes 34, 35, are inserted into the clamping guide slots 217a, 217b on the front and rear sides of the clamping frame 20, as well as the first vertical guide slots 414a, 414b on the front and rear sides of the guide frame 40, thereby driving the clamping members 30a, 30b to move up and down with the horizontal movement of the clamping frame 20. A first ledge 36 extending rearward is provided at the top of the first side wall 31, and a second ledge 37 extending forward is provided at the top of the second side wall 32. Both the first and second ledges 36, 37 extend from the front and rear sides of the housing 10 to fit into the notch 201 below the door and window sash 200. The aforementioned clamping guide structure guides the clamping members 30a and 30b on the clamping frame 20 to move downwardly with the horizontal movement of the clamping frame 20 as the clamping frame 20 moves horizontally relative to the housing 10, such that the first end of the clamping frame 20 approaches the first end of the housing 10, until the first and second lap edges 36 and 37 of the clamping members 30a and 30b abut the lower end of the notch 201, preventing further movement. Second clearance slots 119a and 119b, and 129a and 129b, respectively, are defined on the front and rear sides of the housing 10 to provide clearance for the first and second lap edges 36 and 37, respectively.

[0038] The pulley assembly 50 is installed in the housing 10 in such a manner that it can move up and down along with the horizontal movement of the housing 10. Figure 3 and Figure 7 As shown, the pulley assembly 50 includes a first pulley assembly 50a and a second pulley assembly 50b arranged horizontally and having the same structure. The first pulley assembly 50a and the second pulley assembly 50b each have a pulley mounting frame 51 and two pulleys 52a and 52b rotatably mounted on the horizontal ends of the pulley mounting frame 51. This design can evenly distribute the weight of the door and window sash to each pulley mounting frame and pulley, reducing pressure. Figure 7 As shown, the pulley mounting frame 51 includes a first mounting plate 511a and a second mounting plate 511b spaced apart from each other in the front and rear directions, and two connecting plates 512a and 512b connected to the bottom ends of the first and second mounting plates 511a and 511b. Two outer folded walls 5111 and 5112 are connected to the horizontal ends of the first and second mounting plates 511a and 511b, respectively, and are offset outward from the first and second mounting plates 511a and 511b. Third mounting holes 513a and 513b are defined in the front and rear outer folded walls at each end for mounting the pulleys 52a and 52b. Two parallel height adjustment guide slots 514a and 514b are defined in the first and second mounting plates 511a and 511b of the pulley mounting frame 51, extending obliquely relative to the horizontal direction. The inclination of the height adjustment guide slots 514a and 514b is opposite to that of the clamping guide slots 217a and 217b on the clamping frame 20. The design of the two height adjustment guide grooves 514a and 514b is conducive to balancing the forces on the pulleys 52a and 5ab at both ends of the pulley mounting frame 51. An anti-slip block 53 is also clamped between the first mounting plate 511a and the second mounting plate 511b of the pulley mounting frame 51. The anti-slip block 53 is installed between the two connecting plates 512a and 51ab at the bottom of the pulley mounting frame 51. Figure 7 As shown, the anti-slip block 53 has a horizontally extending slot 531 at its bottom and a front-to-back limiting slot 532 at its top. Two limiting ribs 533 are symmetrically positioned on either side of the limiting slot 532. The limiting block 53 also has a left through slot 534 and a right through slot 535 symmetrically positioned below the limiting slot 532. Vertically extending cantilevers 536 are positioned within the left and right through slots 534 and 535, respectively. The end of the cantilever 536 in the left through slot 534 is provided with a block 537 that protrudes from the front of the anti-slip block 53. Similarly, the end of the cantilever in the right through slot 535 is provided with a block (not visible in the figure) that protrudes from the rear of the anti-slip block 53. The first and second mounting plates 511a and 511b of the pulley mounting frame 51 are provided with corresponding slots 516a and 516b for the anti-slip block 53 to be installed and engaged with the front and rear clamping blocks 537. Fourth mounting holes 515a and 515b are also provided corresponding to the limiting groove 532 of the anti-slip block 53. After the anti-slip block 53 is positioned by the front and rear clamping blocks 537 engaging the slots 516a and 516b on the front and rear sides of the pulley mounting frame 51, the second height adjustment guide shaft 74 passes through the fourth mounting holes 515a and 515b provided on the front and rear sides of the pulley mounting frame 51, and the limiting groove 532 of the anti-slip block 53 abuts against the limiting rib 533, thereby securing the anti-slip block 53 within the pulley mounting frame 51. The anti-slip block 53 moves up and down with the pulleys 52a and 52b but is suspended relative to the lower slide rail to ensure that no interference occurs when the pulleys 52a and 52b roll along the lower slide rail. The sliding groove 531 at the bottom of the anti-slip block 53 prevents the entire pulley mechanism 100 from falling off the lower slide rail.

[0039] See also Figure 3 As shown, the first pulley assembly 50a and the second pulley assembly 50b are placed in the space between the third walls 213 on the front and rear sides of the clamping frame 20. The first pulley assembly 50a passes through the height adjustment guide grooves 514a and 514b on the front and rear sides and the second horizontal guide grooves 415a and 415b on the front and rear sides of the guide frame 40 through two first height adjustment guide shafts 73a and 73b, and is then installed into the two third mounting holes 118a, 128a and 118b, 128b corresponding to the front and rear sides of the housing 10. At the same time, the second vertical guide groove 416a on the front and rear sides of the guide frame 40 is passed through the second height adjustment guide shaft 74. Similarly, the second pulley assembly 50b is inserted into the corresponding two third mounting holes 118c, 128c and 118d, 128d on the front and rear sides of the housing 10 via the two first height adjustment guide shafts 73c, 73d through the height adjustment guide grooves 514a, 514b and the second horizontal guide grooves 415c, 415d on the front and rear sides of the guide frame 40. Simultaneously, the second pulley assembly 50b is inserted into the corresponding two third mounting holes 118c, 128c and 118d, 128d on the front and rear sides of the housing 10 via the second height adjustment guide shaft 74 through the second vertical guide groove 416b on the front and rear sides of the guide frame 40. The height adjustment guide grooves 514a, 514b, the second vertical guide grooves 416a, 416b, the first height adjustment guide shafts 73a, 73b, 73c, and 73d, and the second height adjustment guide shaft 74 together constitute a height adjustment guide structure. When the housing 10 moves horizontally toward its first end gradually approaching the first end of the clamping frame 20 under the guidance of the first guide shafts 71a and 71b moving along the first horizontal guide grooves 216a and 216b, the first height adjustment guide shafts 73a, 73b and 73c, 73d act on the height adjustment guide grooves 514a, 514b of the first pulley assembly 50a and the second pulley assembly 50b respectively, causing the first pulley assembly 50a and the second pulley assembly 50b to move along the height adjustment guide grooves 514a, 514b while the second height adjustment guide shaft 74 moves downward under the guidance of the second vertical guide grooves 416a, 416b.

[0040] See also Figure 3As shown, the guide frame 40 includes a first guide plate 41a and a second guide plate 41b, symmetrically spaced apart from each other, and a guide connecting plate 42 connected to the upper ends of the first and second guide plates 41a, 41b. The left and right ends of the first and second guide plates 41a, 41b are respectively provided with vertically extending first vertical guide slots 414a and 414b, through which the clamping guide shafts 72a and 72b of the clamping members 30a and 30b pass, thereby guiding the vertical movement of the clamping members 30a and 30b. The upper ends of the first and second guide plates 41a, 41b are further provided with fifth clearance slots 413a and 413b, facing the first vertical guide slots 414a and 414b, to clear the first and second lap edges 36 and 37 of the clamping members 30a and 30b. A fourth avoidance groove 411 is defined at the lower middle ends of the first guide plate 41a and the second guide plate 41b for avoiding the two pulleys of the first pulley assembly 50a and the second pulley assembly 50b that are close to each other. Fifth avoidance grooves 412a and 412b are defined at positions away from the ends of the fourth avoidance groove 411 for avoiding the two pulleys of the first pulley assembly 50a and the second pulley assembly 50b that are separated from each other. The first guide plate 41a and the second guide plate 41b are also respectively provided with two vertically extending second vertical guide grooves 416a and 416b that pass through the ends of the second height adjustment guide shaft 74 of the first pulley assembly 50a and the second pulley assembly 50b to guide the first pulley assembly 50a and the second pulley assembly 50b in upward and downward movement. The first guide plate 41a and the second guide plate 41b are also provided with second horizontal guide grooves 415a and 415b extending in the horizontal direction on the left and right sides of the second vertical guide groove 416a respectively, for the two first height adjustment guide shafts 73a and 73b of the height adjustment guide grooves 514a and 514b on the first pulley assembly 50a to pass through and then be installed into the second mounting holes 118a and 118b on the front and rear sides of the outer shell 10. Second horizontal guide grooves 415c and 415d extending in the horizontal direction are respectively provided on the left and right sides of the second vertical guide groove 416b for the two first height adjustment guide shafts 73c and 73d of the height adjustment guide grooves 514a and 514b on the second pulley assembly 50b to pass through and then be installed into the second mounting holes 118c and 118d on the front and rear sides of the outer shell 10. The second horizontal guide grooves 415a~415d constitute a horizontal guide structure for guiding the horizontal movement of the outer shell 10.

[0041] See also Figure 3 Combine Figure 1 and Figure 2As shown, the guide frame 40 is installed above the clamping frame 20 within the housing 10. The first guide plate 41a and the second guide plate 41b of the guide frame 40 are respectively inserted into the gaps between the second wall 212 and the fourth wall 214 on the front and rear sides of the clamping frame 20 and the front and rear side walls 111 and 121 of the housing 10, forming the entire pulley mechanism 100 into a compact whole. The guide connecting plate 42 of the guide frame 40 has a top that is higher than the upper end of the housing 10. After the pulley mechanism 100 is installed between the lower end of the door and window sash 200 and the lower rail, it abuts the upper end of the notch 201, thereby bearing the weight of the sash 200.

[0042] See further Figure 4As shown, the adjustment assembly 60 includes an adjustment screw 61 and an adjustment nut 62 for adjusting the relative position of the housing 10 and the clamping frame 20. The adjustment screw 61 passes through the second through-hole 123 of the third bent wall 122 and the first through-hole 113 of the first bent wall 112 of the housing 10 from the outside of the first end of the housing 10, and then passes through the third through-hole 23 on the first end clamping connecting plate 23 of the clamping frame 20, which is spaced apart from the first end of the housing 10, and is threadedly connected to the adjustment nut 62 fixed to the inside of the first end of the clamping frame 20. In the illustrated embodiment, the adjustment nut 62 is a square nut fixed between the first clamping plate 21a and the second clamping plate 21b of the clamping frame 20 and prevents rotation. In addition, the adjustment assembly 60 is further provided with a limit plate 63 that is fixed to the adjustment screw 61 on the inside of the first end of the housing 10 to limit the adjustment screw 61 to rotation relative to the housing 10 and prevent axial movement. During installation and commissioning, when the adjusting screw 61 is turned forward, there is no relative displacement between the adjusting nut 62 and the clamping frame 20. The force applied to the adjusting nut 62 is consistent with the adjustment direction of the adjusting screw 61, which saves effort, maintains a stable force state, and is not easily loosened. When the adjusting screw 61 is turned forward, the rotation of the adjusting screw 61 relative to the adjusting nut 62 causes the clamping frame 20 to move toward its first end gradually approaching the first end of the housing 10 under the guidance of the horizontal guide shafts 71a, 71b moving along the first horizontal guide grooves 216a, 216b. At the same time, the clamping members 30a, 30b are displaced downward under the guidance of the height adjustment guide shafts 72a, 72b moving along the clamping guide grooves 217a, 217b and the first vertical guide grooves 414a, 414b until the first and second lap edges 36, 37 abut against the notch 201 below the door and window sash 200. When the adjusting screw 61 is screwed in the forward direction, the rotation of the adjusting screw 61 relative to the adjusting nut 62 can also cause the housing 10 to move toward its first end gradually approaching the first end of the clamping frame 20 under the guidance of the horizontal guide shafts 71a, 71b moving along the first horizontal guide grooves 216a, 216b, and at the same time, the first pulley assembly 50a and the second pulley assembly 50b move along the height adjustment guide grooves 514a, 514b while the second height adjustment guide shaft 74 moves along the second vertical guide grooves 416a, 416b to produce a downward displacement relative to the housing 10 to adjust the height of the pulleys 52a, 52b exposed to the lower end of the housing 10.

[0043] According to the first embodiment of the present application, the pulley mechanism 100 can be installed in the notch 201 below the fan body 200 after the fan is hung on the door or window, and the guide frame 40 abuts against the upper end of the notch 201, and the pulleys 52a and 52b of the pulley assembly 50 abut against the lower rail (see Figure 9During the positive adjustment of the adjusting screw 61 of the adjusting assembly 60, the clamping frame 20, which is not subjected to force, is first moved horizontally toward its first end gradually approaching the first end of the housing 10, thereby driving the clamping members 30a and 30b to move downward under the guidance of the clamping guide structure, until the first and second lap edges 36 and 37 of the clamping members 30a and 30b abut against the lower end of the notch 201 to prevent the clamping frame 20 from continuing to move horizontally (see Figure 11 ), thereby causing the housing 10 to move horizontally relative to the clamping frame 20 toward its first end gradually approaching the first end of the clamping frame 20, thereby driving the pulley assembly 50 to move downward relative to the housing 10 under the guidance of the height adjustment guide structure, until the pulleys 52a, 52b of the pulley assembly 50 are exposed to the maximum height of the lower end of the housing 10 (see Figure 15 In this way, the pulley mechanism 100 can be clamped and installed with the door and window body 200 by operating an adjustment component 60, and then the pulley can be adjusted to a suitable height. The door and window body 200 can be hung first, and then the pulley mechanism 100 is installed in the slot 201 below the door and window body 200. The pulley mechanism 100 is then clamped in the slot 201, and then the pulley height is adjusted, making the installation operation of the door and window easier.

[0044] The specific operation process of the pulley mechanism 100 according to the above embodiment of the present application to realize the step-by-step clamping adjustment function of first hanging the fan, then installing and clamping, and then adjusting the pulley height is as follows:

[0045] After the fan body 200 of the door and window is hung, the pulley mechanism 100 is installed between the notch 201 below the fan body 200 and the lower rail in the initial state, see Figure 8 and Figure 9 As shown, the guide connecting plate 42 of the guide frame 40 abuts the upper end of the slot 201, the pulleys 52a and 52b of the first and second pulley assemblies 50a and 50b abut the lower rails, and the first and second lap edges 36 and 37 of the clamping members 30a and 30b are inserted into the slot 201. To support the gravity of the fan body 200, the second height adjustment guide shafts 74 of the first and second pulley assemblies 50a and 50b abut the upper ends of the second vertical guide grooves 416a and 416b on the guide frame 20, respectively. The first height adjustment guide shafts 73a-73d are located at the left ends of the second horizontal guide grooves 415a-415d and the lower ends of the height adjustment guide grooves 514a-514d, so that the pulley mechanism 100 as a whole has a minimum height h1 in the initial state. In this initial state, the clamping frame 20 and the clamping members 30a, 30b are in a relaxed state due to no force, and the clamping guide shafts 72a, 72b passing through the clamping members 30a, 30b are simultaneously located at the upper ends of the first vertical guide shafts 414a, 414b and the clamping guide grooves 217a, 217b.

[0046] Then see Figure 10and Figure 11 As shown, by turning the adjusting screw 61 in the forward direction, the unstressed clamping frame 20 will first move its first end gradually closer to the first end of the housing 10 ( Figure 10 The clamping frame 20 (as indicated by the left-pointing arrow in the figure) moves horizontally relative to the housing 10, and through the clamping guide grooves 217a and 217b, acts on the clamping guide shafts 72a and 72b, driving the clamping members 30a and 30b to gradually move downward along the first vertical guide grooves 414a and 414b until the first and second lap edges 36 and 37 of the clamping members 30a and 30b abut the lower end of the notch 201 and cannot move further downward. At this point, further horizontal movement of the clamping frame 20 is also prevented, and the pulley mechanism 100 is in the second state, clamped and installed in the notch 201 of the fan body 200. In this second state, the first and second pulley assemblies 50a and 50b do not move, and the pulley mechanism 100 as a whole still maintains the minimum height h1.

[0047] Then see Figure 12 and Figure 13 As shown, the adjusting screw 61 is continuously screwed forward. Since the horizontal movement of the clamping frame 20 toward the first end thereof gradually approaching the first end of the housing 10 has been prevented, the axial movement of the adjusting screw 61 relative to the adjusting nut 62 drives the housing 10 relative to the clamping frame 20 in the opposite direction toward the first end of the housing 10 gradually approaching the first end of the clamping frame 20 ( Figure 12 The first pulley assembly 50a and the second pulley assembly 50b move horizontally along the second horizontal guide grooves 415a~415d through the first height adjustment guide shafts 73a~73d, and at the same time act on the height adjustment guide grooves 514a~514d of the first pulley assembly 50a and the second pulley assembly 50b respectively, driving the first pulley assembly 50a and the second pulley assembly 50b to gradually move downward relative to the housing 10 along the second vertical guide grooves 416a and 416b through the second height adjustment guide shaft 74, and the pulleys 52a and 52b of the first pulley assembly 50a and the second pulley assembly 50b are gradually exposed from the lower end of the housing 10. At this time, the pulley mechanism 100 is in the third state of adjusting the pulley height, and the overall height is gradually adjusted to be higher. Until the second height adjustment guide shafts 74 of the first pulley assembly 50a and the second pulley assembly 50b respectively abut against the lower ends of the second vertical guide grooves 416a and 416b of the guide frame 20, the first pulley assembly 50a and the second pulley assembly 50b cannot move downward any further, and the pulleys 52a and 52b are exposed to the maximum height of the lower end of the housing 10, see Figure 14 and Figure 15As shown. At this point, the first height adjustment guide shafts 73a-73d move to the right end of the second horizontal guide slots 415a-415d and the upper end of the height adjustment guide slots 514a-514d as the housing 10 moves horizontally. At this point, the pulley mechanism 100 is adjusted to its highest position, with the entire mechanism having a maximum height h2. Of course, when adjusting the height after hanging the fan, it is only necessary to adjust the height of the pulley exposed at the lower end of the housing to an appropriate height to ensure that the fan body is installed in a balanced manner and can be pushed and pulled smoothly. Adjusting to the maximum height is not necessary.

[0048] According to the pulley mechanism 100 of the above embodiment of the present application, when the door and window fan body 200 is first hung and then installed under the fan body 200, the fan body 200 can be clamped first and then the pulley height can be adjusted by forward screwing the adjusting screw 61. The clamping force of the clamping parts 30a and 30b comes from the pressure of the fan body 200 on the first pulley assembly 50a and the second pulley assembly 50b, which is transferred to the clamping frame 20 and the outer shell 10, ensuring that the clamping is stable and will not loosen. According to the above-mentioned embodiment of the present application, the pulley mechanism 100 can also be clamped and installed in the slot 201 of the door and window sash body 200 before the door and window sash body 200 is hung. However, since the outer shell 10 and the clamping frame 20 are not subjected to force, when the adjustment component 60 is adjusted in the positive direction, the clamping and pulley height adjustment are carried out synchronously. The pulley needs to be adjusted to the highest state so that the outer shell 10 cannot move in the direction of its first end gradually approaching the first end of the clamping frame 20. Only then can the pulley mechanism 100 be clamped in the slot 201 through the clamping members 30a and 30b.

[0049] Figures 16 to 18 Schematic diagrams of the structure of the pulley mechanism 1000 of the sliding door and window according to the second embodiment of the present application in different states of being installed below the door and window fan body are shown. Figures 16 to 18The pulley mechanism 1000 of the second embodiment shown has a structure and operating principle substantially identical to that of the pulley mechanism 100 of the first embodiment, primarily comprising a housing 1100, a clamping frame 1200, a guide frame 1400, a pulley assembly 1500, and an adjustment assembly 1600. The clamping frame 1200 is mounted within the housing 1100, with a certain distance between a first end of the clamping frame 1200 in the pulley's rolling direction and a corresponding first end of the housing 1100. The clamping frame 1200 defines clamping guide slots 1210a and 1210b extending obliquely relative to the horizontal direction, and the guide frame 1400 is provided with clamping guide shafts 1710a and 1710b extending through the corresponding clamping guide slots 1210a and 1210b. The clamping guide grooves 1210a, 1210b and the clamping guide shafts 1710a, 1710b together constitute a clamping guide structure, which guides the clamping frame 20 relative to the housing 10 in an inclined direction, gradually approaching the first end of the housing 10, while simultaneously causing downward displacement, until the ledges 1220a and 1220b provided on the clamping frame 20 move downward to abut the lower end of the notch in the door or window sash. The pulley assembly 1500 is mounted within the housing 1100. Similar to the pulley mechanism 100 of the first embodiment, the pulley mechanism 1000 comprises two horizontally arranged pulley assemblies 1500 of identical structure. Each pulley assembly 1500 is equipped with height adjustment guide shafts 1730a and 1730b, which extend through the second vertical guide grooves 1410a and 1410b defined in the guide frame 40 and the corresponding height adjustment guide grooves 1110a and 1110b defined in the housing 1100. Height adjustment guide grooves 1110a, 1110b, second vertical guide grooves 1410a, 1410b, and third guide shafts 1730a, 1730b collectively constitute a height adjustment guide structure, which is used to guide pulley assembly 1500 to move downward relative to housing 1100 when housing 1100 moves relative to clamping frame 1200 in a direction that brings the first end of housing 1100 closer to the first end of clamping frame 1200. Guide frame 1400 is installed above clamping frame 1200 within housing 1100. Guide frame 1400 has a top portion that protrudes above the upper end of housing 1100. When pulley mechanism 1000 is installed between the lower surface of the door or window sash and the lower rail, it abuts the upper end of the notch, thereby bearing the weight of the sash. Different from the guide frame 40 in the pulley mechanism 100 of the first embodiment, the guide frame 1400 is only provided with second vertical guide grooves 1410a and 1410b corresponding to the height adjustment guide shafts 1730a and 1730b of the pulley mechanism 1500 to guide the up and down movement of the pulley assembly 1500.The adjustment assembly 1600 includes an adjustment screw 1610 and an adjustment nut 1620. The adjustment nut 1620 can be retained in a vertical slot on the inner side of the first end of the clamping frame 1200, as long as no rotational movement relative to the clamping frame 1200 occurs. The adjustment screw 1610 passes through the first end of the housing 1100 and is threadedly connected to the adjustment nut 1620. When the adjustment screw 1610 is rotated, the housing 1100 and the clamping frame 1200 move relative to each other, thereby adjusting the relative position of the housing 1100 and the clamping frame 1200. When the adjustment screw 1610 of the adjustment assembly 1600 is adjusted in a positive direction, the clamping frame 1200 is guided by the clamping guide structure toward its first end, gradually moving closer to the first end of the housing 1100. Simultaneously, the clamping frame 1200 is displaced downward, and the lap edges 1220a and 1220b abut against the notch 201 below the door or window sash. When the adjusting screw 1610 of the adjusting assembly 1600 is adjusted in the positive direction, the housing 1100 can also move toward its first end gradually approaching the first end of the clamping frame 1200 under the guidance of the height adjustment guide structure, while causing the pulley assembly 1500 to move downward relative to the housing 1100 to adjust the height of the pulley exposed at the lower end of the housing 1100.

[0050] According to the second embodiment of the present application, the pulley mechanism 1000 can be installed in the slot below the door or window after the door or window is hung, with the guide frame 1400 abutting against the upper end of the slot, and the pulley of the pulley assembly 1500 abutting against the lower rail, see Figure 16 As shown. Due to the need to bear the gravity of the fan body, the height adjustment guide shafts 1730a, 1730b of the pulley assembly 1500 respectively abut against the height adjustment guide grooves 1110a, 1110b on the housing 1100 and the upper ends of the second vertical guide grooves 1410a, 1410b on the guide frame 1400, so that the pulley mechanism 1000 as a whole has a minimum height in the initial state. In this initial state, the clamping frame 1200 is in a relaxed state due to no force, and the clamping guide shafts 1710a, 1710b are located at the lower ends of the clamping guide grooves 1210a, 1210b. Then see Figure 17 As shown, by turning the adjustment screw 1610 forward, the unstressed clamping frame 1200 will first be guided by the clamping guide shafts 1710a and 1710b along the clamping guide slots 1210a and 1210b to gradually move toward its first end in an inclined direction closer to the first end of the housing 1100, while also moving downward relative to the housing 10, until the lap edges 1220a and 1220b on the clamping frame 1200 abut against the lower end of the slot and cannot move further downward. At this point, the continued movement of the clamping frame 1200 is also prevented, and the pulley mechanism 1000 is in the second state of being clamped and installed in the slot of the fan body. In this second state, the pulley assembly 1500 does not move, and the pulley mechanism 1000 as a whole still has the minimum height. Then refer to Figure 18As shown, the adjusting screw 1610 is continuously screwed forward. Since the movement of the clamping frame 1200 toward the first end thereof gradually approaching the first end of the housing 1100 has been blocked, the axial movement of the adjusting screw 1610 relative to the adjusting nut 1620 drives the housing 1100 toward the first end of the housing 1100 gradually approaching the first end of the clamping frame 1200. The height adjustment guide shafts 1730a and 1730b move tiltedly along the height adjustment guide grooves 1110a and 1110b, respectively, and the height adjustment guide shafts 1730a and 1730b act on the height adjustment guide grooves 1110a and 1110b. The pulley assembly 1500 is gradually moved downward along the second vertical guide grooves 1410a and 1410b relative to the housing 1100, and the pulley of the pulley assembly 1500 gradually emerges from the lower end of the housing 1100 until the height adjustment guide shafts 1730a and 1730b respectively abut against the lower ends of the height adjustment guide grooves 1110a and 1110b and the second vertical guide grooves 1410a and 1410b. The pulley assembly 1500 can no longer move downward, and the pulley is exposed to the maximum height of the lower end of the housing. At this time, the pulley mechanism 1000 is adjusted to the highest state, and the entire structure has the maximum height, as shown in FIG. Figure 18 shown.

[0051] According to the second embodiment of the present application, the pulley mechanism 1000 of the sliding door and window can realize the clamping installation of the pulley mechanism 1000 and the door and window fan body and adjust the pulley height through the positive adjustment of an adjustment component 1600, so that the pulley mechanism 1000 and the fan body are clamped stably and will not loosen.

[0052] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A pulley mechanism for sliding doors and windows, characterized in that: It includes a housing, a clamping frame, a guide frame, a pulley assembly and an adjustment assembly, wherein: The clamping frame is installed in the housing, and a gap is formed between a first end of the clamping frame in the rolling direction of the pulley and a corresponding first end of the housing. The guide frame is installed in the housing, and the guide frame has a top portion that is higher than the upper end of the housing. The clamping frame and the guide frame are provided with a matching clamping guide structure, and the clamping guide structure guides the clamping frame to produce a downward displacement when the clamping frame moves relative to the housing in a direction that brings the first end of the clamping frame closer to the first end of the housing. The pulley assembly is installed in the housing, and the pulley assembly has at least one pulley that cooperates with the lower rail; the pulley assembly, the housing, and the guide frame are provided with a height adjustment guide structure that cooperates, and the height adjustment guide structure guides the pulley assembly to move downward relative to the housing and the guide frame when the housing moves relative to the clamping frame in a direction that brings the first end of the housing close to the first end of the clamping frame; The adjusting assembly is connected to the housing and the clamping frame respectively to adjust the relative position of the housing and the clamping frame, and when the adjusting assembly is positively adjusted, the clamping frame is moved in a direction in which its first end gradually approaches the first end of the housing, and at the same time, the clamping frame is guided by the clamping guide structure to produce a downward displacement to press against the notch below the door and window sash body, and when the adjusting assembly is positively adjusted, the housing is also moved in a direction in which its first end gradually approaches the first end of the clamping frame, and at the same time, the pulley assembly is guided by the height adjustment guide structure to produce a downward displacement relative to the housing and the guide frame to adjust the height of the pulley exposed from the lower end of the housing; the adjusting assembly includes an adjusting screw and an adjusting nut; The clamping guide structure includes a clamping guide groove extending obliquely relative to the horizontal direction and a first vertical guide groove correspondingly provided on the guide frame and extending vertically. The clamping frame is provided with a clamping member which is simultaneously passed through the clamping guide groove and the first vertical guide groove through a clamping guide shaft so as to move up and down with the horizontal movement of the clamping frame. When the adjustment assembly is positively adjusted to make the clamping frame move horizontally toward its first end gradually approaching the first end of the shell, the clamping member moves downward under the guidance of the clamping guide shaft along the clamping guide groove and the first vertical guide groove until the overlapping edge of the clamping member abuts the lower end of the notch.

2. The pulley mechanism for sliding doors and windows according to claim 1, characterized in that: When the pulley mechanism is installed between the bottom of the door and window sash body and the lower lower rail, the top of the guide frame abuts the upper end of the slot below the door and window sash body, and the pulley is supported on the lower lower rail. Positive adjustment of the adjustment component first causes the clamping frame to move toward its first end gradually approaching the first end of the shell while guiding the clamping frame to produce a downward displacement through the clamping guide structure until the clamping frame abuts against the slot below the door and window sash body and is blocked from moving, thereby causing the shell to move toward its first end gradually approaching the first end of the clamping frame while guiding the pulley assembly to produce a downward displacement relative to the shell and the guide frame through the height adjustment guide structure until the pulley is exposed to the maximum height of the lower end of the shell.

3. The pulley mechanism for sliding doors and windows according to claim 1 or 2, characterized in that: The adjusting nut is clamped on the first end of the clamping frame, and the adjusting screw is threadedly connected to the adjusting nut after passing through the first end of the shell. When the adjusting screw is rotated, the shell and the clamping frame are driven to move relative to each other.

4. The pulley mechanism for sliding doors and windows according to claim 1, characterized in that: The clamping frame and the shell are provided with a horizontal guide structure that cooperates to guide the clamping frame and the shell to produce relative movement in the horizontal direction.

5. The pulley mechanism for sliding doors and windows according to claim 1, characterized in that: The clamping guide structure includes a clamping guide groove and a clamping guide shaft respectively provided on the clamping frame and the guide frame, which extend obliquely relative to the horizontal direction, and the clamping guide shaft is passed through the clamping guide groove; when the adjustment assembly is adjusted positively, the clamping frame moves in an oblique direction toward the first end of the shell gradually approaching its first end under the guidance of the clamping guide shaft moving along the clamping guide groove, while generating a downward displacement until the overlapping edge of the clamping frame contacts the lower end of the notch.

6. The pulley mechanism for sliding doors and windows according to claim 1, characterized in that: The height adjustment guide structure includes a height adjustment guide groove and a height adjustment guide shaft respectively provided on the pulley assembly and the housing and extending obliquely relative to the horizontal direction, and a second vertical guide groove correspondingly provided on the guide frame and extending vertically. The height adjustment guide shaft is simultaneously passed through the height adjustment guide groove and the second vertical guide groove. When the adjustment assembly is positively adjusted to move the housing toward its first end gradually approaching the first end of the clamping frame, the pulley assembly moves downward under the guidance of the height adjustment guide shaft moving along the height adjustment guide groove and the second vertical guide groove.

7. The pulley mechanism for sliding doors and windows according to claim 1, characterized in that: The height adjustment guide structure includes a height adjustment guide groove and a first height adjustment guide shaft, which are respectively provided on the pulley assembly and the shell and extend obliquely relative to the horizontal direction, and a second vertical guide groove and a second height adjustment guide shaft, which are respectively provided on the guide frame and the pulley assembly and extend vertically. The first height adjustment guide shaft is passed through the height adjustment guide groove, and the second height adjustment guide shaft is passed through the second vertical guide groove. When the adjustment assembly is positively adjusted to make the shell move toward the direction in which its first end gradually approaches the first end of the clamping frame, the pulley assembly moves downward under the guidance of the first height adjustment guide shaft moving along the height adjustment guide groove and the second height adjustment guide shaft moving along the second vertical guide groove.

8. The pulley mechanism for sliding doors and windows according to claim 1, characterized in that: The pulley assembly includes a pulley mounting frame and two pulleys rotatably mounted on both ends of the pulley mounting frame. The pulley mounting frame and the housing are provided with matching height adjustment guide structures.

9. The pulley mechanism for sliding doors and windows according to claim 8, characterized in that: The pulley mechanism is provided with at least two pulley assemblies arranged in a horizontal direction.

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